108results about How to "Good anti-collision" patented technology

Aspects for achieving efficient data access to data elements in a relational database management system are provided. In a computer-implemented method aspect, the efficient data access occurs by establishing a hash table for data elements of a database in a predetermined continuous space of allocated storage, and optimizing utilization of the hash table during database query operations through linear hashing, wherein extension of the hash table occurs automatically to increase a number of pages in the hash table without discernible interruptions of data access to the data elements.

The invention discloses a conveniently-used cargo box applied to ship transportation. The cargo box comprises an outer box and an inner box, wherein the upper part of the outer surface of the outer box is fixedly connected with two mutually-symmetric support rods; one end away from the outer box of each support rod is fixedly connected with a ring-shaped fixing ring; a clamping groove is formed in the inner bottom wall of the outer box; the inner side wall of the outer box is fixedly connected with two groups of mutually-symmetric first buffer springs; the inner box is located inside the outer box; one end away from the outer box of each first buffer spring is fixedly connected with the outer side of the inner box; the bottom of the inner box is fixedly connected with clamping blocks which are matched with the clamping groove; and the clamping blocks are clamped in the clamping groove. Through the conveniently-used cargo box applied to ship transportation, the external force can be effectively buffered; the damage to cargos can be effectively avoided; the cargos can be effectively protected; the effective transportation of the cargos is ensured; the collision resistance is high; the cargo box can be effectively locked; the cargo box is more convenient to use.

The invention relates to a metal-fiber foamed aluminum composite layer plate. The composite layer plate comprises at least one metal plate layer, at least one fiber layer and at least one foamed aluminum layer, wherein the fiber layer and the foamed aluminum layer are alternately bonded through a high-temperature-resistant polymer adhesive compound; as the outermost layer, the metal plate layer is bonded with the fiber layer through a high-hardness polymer adhesive compound. The invention further relates to a preparation method of the metal-fiber foamed aluminum composite layer plate. The preparation method mainly comprises the following steps: surface decontaminating treatment is performed on the metal plate layer and the foamed aluminum layer, treated surfaces are coated with the high-temperature-resistant polymer adhesive compound and the high-hardness polymer adhesive compound, and pressure curing treatment is performed after all the layers are bonded together. Compared with a metal foamed aluminium sandwich structure, the metal-fiber foamed aluminum composite layer plate disclosed by the invention has a better mechanical property, a better characteristic of shock absorption and a better performance of sound insulation, and also has a good performance resistant to high-speed impact, a good capability resistant to bending deformation, an extremely high performance of fire resistance, and low cost.

The invention relates to the technical field of forklift batteries, and discloses an anti-shock and anti-falling forklift battery. The forklift battery comprises a protective box, wherein the bottom wall of an inner cavity of the protective box is fixedly equipped with two supporting legs. The anti-shock and anti-falling forklift battery is provided with pulling springs and sliding blocks, the battery will press a second U-shaped block and limit blocks when there is a shock so as to enable the second U-shaped block to drive supporting rods to press the sliding blocks downward, and then the sliding blocks move towards the left and right, so that the pulling springs are driven to stretch, the pulling springs can play a role of shock absorption, the battery is prevented from being contacted with the bottom wall of the inner cavity of the protective box to result in great shock and collision. The downward movement of the limit blocks will press fixing blocks to move downward, and the pulling springs will also be pressed to move downward, thereby being capable of playing a good anti-collision and shock absorption effect on the battery, preventing the bottom of the battery from resultingin collision and shock with the bottom wall of the protective box, playing a good role of shock absorption and shock resistance, and enabling the service life of the battery to be longer.

The invention discloses a sea-crossing bridge pier anti-collision buffer device and belongs to the field of bridge safety protection. The device comprises a first anti-collision assembly. The first anti-collision assembly and a second anti-collision assembly are connected to a pier in a sleeving mode. The second anti-collision assembly is connected with the first anti-collision assembly through asteel rope; the first anti-collision assembly comprises a protective gasket connected to the outer side of the pier in a sleeving mode; a main ring sleeve is arranged on the outer side of the protective gasket; and a coaxial ring groove is formed in the inner wall surface of the main ring sleeve, two ring grooves are formed in the inner wall surface of the main ring sleeve, rotatable sliding steelrings are installed in the ring grooves and connected with the outer wall surface of the protective gasket through supporting pieces, the supporting pieces are arranged in a surrounding mode, and a first buoyancy air bag is arranged between the upper supporting piece and the lower supporting piece and surrounds the protective gasket. According to the device, a protection position can be adjustedalong with a water level, the piers in water can be protected at the same time, a ship movement direction can be changed during collision, graded collision is achieved, ship collision damage is reduced, and a radial impact force borne by skilled transition is decreased.

The invention relates to a solidifiable belt which is used for the pipeline mending leakage and the cable mending and protection. The belt is characterized in that a layer of flame retardant polyurethane prepolymer mixture is coated on glass fiber cloth and then is packed in vacuum way to obtain the solidifiable belt. Flame retarding agent and polyhydroxy compound are used for the mixing. Then, under the protection of inert gas, polyisocyanate and the polyhydroxy compound are polymerized to obtain prepolymer with -NCO end. Added with catalyst, the prepolymer with -NCO end is coated on the glass fiber cloth without alkali or with low alkali, rolled and packed in vacuum to obtain a finished product. When the belt is used, the package is opened and the belt is winded on the outside of the cable or the pipeline. Through the reaction between polyurethane prepolymer and water in the air, a melting-free and thawing-free elastic protective layer is obtained after the rapid solidification. The solidifiable belt which is used for the pipeline mending leakage and the cable mending and protection has the beneficial effects that the belt is winded on the outside of the cable or the pipeline when in use and the melting-free and thawing-free elastic protective layer is obtained through the reaction between polyurethane prepolymer and water in the air after the rapid solidification. And the solidifiable belt has the effects of perfect insulation, flame retardancy, waterproof, leakproof and anti-collision.

The invention discloses a high-voltage electrostatic precipitator. The high-voltage electrostatic precipitator comprises a high-voltage generation module and electrostatic precipitation boards, and is characterized by further comprising a base and at least one mounting rod mounted above the base, wherein the high-voltage generation module is mounted in the mounting rod, the electrostatic precipitation boards are distributed on the mounting rod and connected with the high-voltage generation module through wires. The high-voltage electrostatic precipitator can be made in a simulation tree shape, is simple in structure, safe, attractive and elegant, can be combined organically with urban or home environment and can also have a decorative function; the electrostatic precipitator is long in service life and low in energy consumption, can absorb and precipitate suspended particulates and PM 2.5 in urban public places and home in an omnibearing and three-dimensional manner, and has good performance of wind resistance, collision resistance and bending resistance; and further, a solar panel is adopted for power supply, so that the electrostatic precipitator is independent from external power supply while saving the energy, and the application field of the electrostatic precipitator is broadened effectively.

A bulletproof helmet free of connectors and hole connections is prepared as forming and distributing multi-group connection elements symmetrically to central axis in bulge free mode as per requirement of connection-fastening system at internal wall of casque shell when said shell is formed by nonmetal material, enabling to connect said system to said elements in separated way, using a regulation-fastening belt to connect said shell and said system together to form Y shaped three-way regulation-fastening unit with lower jaw part being able to be regulated dynamically.

The invention relates to a municipal road construction sign which comprises a base and universal wheels arranged at the bottom end of the base. A supporting plate is arranged over the base. A plurality of bottom springs are connected between the supporting plate and the base. The supporting plate is further provided with a supporting rod which extends upward vertically. A top sign is arranged on the supporting rod, and the bottom end of the top sign is rotatably connected with the top end of the supporting rod through a bearing. A pushing rod which extends upward vertically is further arranged at the top end of the top sign. A cover body is arranged at the top end of the pushing rod. An accumulator and an LED light are arranged at the bottom end of the cover body separately. The accumulator and the LED light are connected through a wire. An LED switch is connected with the wire in series. Meanwhile, a plurality of top springs are connected between the bottom end of the top sign and the upper portion of the supporting rod. By means of the structure, the municipal road construction sign is good in anticollision or damping and buffering property, so that the safety of pedestrians and vehicles is guaranteed greatly.

The invention discloses an anti-shear self restoring pier joint comprising a pier, a base, an unbonded prestressed steel bar, a plurality of anti-shear components and a plurality of reserved ductile steel bars, wherein the pier and the anti-shear components are positioned on the base; the anti-shear components are positioned around the pier; the upper end of the unbonded prestressed steel bar is connected with the pier and the lower end of the unbonded prestressed steel bar is connected with the base; and the upper end of each reserved ductile steel bar is connected with the pier and the lower end of each reserved ductile steel bar is connected with the base. The anti-shear self restoring pier joint facilitates the anti-shearing and anti-collision of the pier and can effectively improve the safety redundancy of the pier.

The invention discloses an anti-collision road guardrail. The anti-collision road guardrail comprises protective barriers and a stand column, wherein the stand column is movably provided with a connecting plate capable of connecting the end parts of two adjacent protective barriers, the connecting plate is arranged on the side, facing a road, of the stand column and can move towards the directionof the stand column, a first elastic buffering mechanism is arranged between the connecting plate and the stand column, the first elastic buffering mechanism can give reverse elastic acting force of the connecting plate when the connecting plate moves towards the stand column, the end parts of the two adjacent protective barriers are correspondingly pivoted at the two ends of the connecting plate,a second elastic buffering mechanism is arranged between the protective barriers and the connecting plate, and the second elastic buffering mechanism can give reverse elastic acting force of the protective barriers when the protective barriers swing towards the outside direction of the road along the pivot joint. The invention has the advantages that the structure is simple, a better buffering effect is provided for the acting force generated when a vehicle is impacted, especially the deflection acting force generated during bending deformation of the protective barriers.

The invention relates to a method for manufacturing an aluminum alloy handle. The method is technologically characterized by including the steps of casting, refinement, extrusion, saw cutting, pattern brushing, machining, surface treatment, packaging, storage and others. The aluminum alloy handle has the advantages of being high in strength, resistant to corrosion, abrasion and collision, beautiful in appearance, luxurious, gorgeous, high in finished product rate, low in comprehensive cost and the like, and the method is applied to door handles of a refrigerator, a freezer, a microwave oven and other household appliances.

The invention discloses a medical detector with anti-collision performance, which comprises a protective box and a box cover. Two symmetrical locking grooves are opened on the edge of the upper surface of the protective box, and the inner wall of the protective box is fixedly connected with A buffer shell suitable for the protective box, the top of the buffer shell is fixedly connected with a limiting plate. The medical detector with anti-collision performance can effectively store the main body of the medical detector, and can lift and move the main body of the medical detector, effectively avoiding the influence of water stains on the main body of the medical detector, and effectively ensuring the safety of the medical detector. The normal use of the medical detector is more convenient to use, and it can effectively release the external force, avoiding the influence of the external force on the medical detector, and has good anti-collision performance, which can effectively protect the stored medical detector. A certain anti-skid performance effectively guarantees the relative stability of the protection box, has a certain buffer performance, and has a better protection effect.

The invention discloses a UHF RFID reader based on a beam switching smart antenna and belongs to the technical field of radio frequency identification. The UHF RFID reader is characterized in that during signal transmitting, a digital module controls a radio-frequency transceiver module to produce a radio frequency signal according to commands and communication protocol of a controller, meanwhile, the digital module controls a beam change-over switch to switch corresponding channels of a beam former according to the beam switching control algorithm, the radio frequency signal generates an output signal of which the phase difference conforms to a certain rule after passing through the beam former, and the output signal is amplified by a power amplifier and then fed into an antenna array through a transmit-receive duplexer. The gains of all power amplifiers are controlled by the digital module. Electromagnetic waves radiated by antenna array elements are stacked in the space to form a high-gain narrow beam. During signal receiving, the process is opposite to that during signal transmitting. According to the invention, the maximal read-write distance, the effective recognition zone, the collision resistance, the positioning accuracy and the like are all improved.

The invention discloses a floating body of a mud discharge pipe, and belongs to the technical field of the design and manufacturing of a mud discharge pipeline used in dredging engineering. The technical scheme is that: the floating body of the mud discharge pipe comprises two half-pipe floating bodies which consist of a metal reinforcing framework layer and an elastic material layer and have a structure of an inner wall layer, an outer wall layer and a closed cavity, and is characterized in that: the whole surface of the metal reinforcing framework layer is coated with the elastic material layer. Compared with the prior art, the invention has the obvious progress and prominent substantial characteristics that: the floating body of the mud discharge pipe keeps high technical characteristics in the prior art, has higher corrosion resistance, longer service life, lower using cost, is more convenient and quicker to install and transport, and the like.

The invention discloses an electronic production equipment storage box with an anti-collision function. The electronic production equipment storage box with the anti-collision function comprises a storage box body, wherein two symmetric limiting grooves are formed in the edges of the upper surface of the storage box body; a sealing plate is placed on the upper surface of the storage box body; clamping grooves are formed in the inner bottom wall of the storage box body; an accommodating box is placed in the storage box body; and the outer side surfaces of the accommodating box are fixedly connected with two symmetric first strong springs. According to the electronic production equipment storage box with the anti-collision function, fixing seats and buffering rods are arranged on the outer side surfaces of the accommodating box, impact on the storage box body can be buffered by the elasticity of second strong springs under the combined action of chutes and sliding blocks, the anti-collision effect is good, by cooperation of sliding of the accommodating box through the clamping grooves and clamping blocks and damping of the first strong springs, the anti-collision effect of the storage box body is good, and electronic storage equipment is protected favorably.

The invention discloses a welding tool storage box with anti-collision function. Both are provided with a first clamping slot. The welding tool storage box with anti-collision function utilizes the elastic force of the first buffer spring, and the buffer plate can move reasonably in the buffer cavity, so that the external force can be effectively slowed down, and the storage box can be effectively avoided. , to avoid damage to welding tools, good anti-collision performance, can stack the placement seat, can effectively protect the welding tools, more convenient to use, has a certain anti-slip performance, avoids the sliding of welding tools, and uses Due to the elastic force of the second buffer spring, the sealing plug can move up and down, thereby effectively extruding and protecting the placement seat, effectively ensuring the normal use of people, and the storage effect is good.

The invention discloses a chemicals storage tank which comprises an outer tank, and an inner tank arranged in the outer tank. The inner part of the inner tank is a storage cavity. A seal cover is arranged at the top end of the outer tank, and rollers are fixed to the bottom; a snap joint is arranged at a covered part of the seal cover and the outer tank, and a sensor is arranged on the snap joint;and a roller control device is arranged on each roller and is electrically connected to the sensor. The chemicals storage tank is simple in structure and is mainly used for storing, transporting andusing chemical products, so that the safety of the inner tank is guaranteed effectively and the safety in a transportation process is guaranteed. The chemicals storage tank is further good in corrosion resistance and impact resistance.

The invention provides an assembled reinforced protection and isolation guardrail, and belongs to the field of highway traffic facilities. The installation and operation of the assembled reinforced protection and isolation guardrail is significantly simplified, the assembly speed is fast, the industrialization process is advantageously promoted, the construction cost is low, the industrialized disassembly is convenient and the installation is easy. The collision prevention and shock absorption coordination energy dissipation capability of the guardrail is strong, the impact force can be fullydissipated, an energy-dissipating steel plate composite structure and a light energy-dissipating material arranged in a collision-prevention device and extruding each other can provide stable dampingforce, shock absorption and energy-dissipating capacity through the impact force acting on the collision-prevention device. The energy-dissipating steel plate composite structure has good coordinationand connection performance, can disperse and transmit the impact force, and can significantly improve the energy dissipation efficiency. The guardrail has good application effect, strong practicability, more convenient assemblage, and can be replaced well if damaged, has the ability to protect the vehicle against collision and damage, and the service life of the guardrail can be greatly increased.

The invention relates to the technical field of vehicle sensors, in particular to an automobile low-speed driving anti-collision ultrasonic sensor which comprises an aluminum shell with an opening at one end; a piezoelectric wafer which is fixedly arranged at one end, far away from the opening, in the aluminum shell and is tightly attached to the inner wall of the aluminum shell, wherein electric energy and sound energy are mutually converted by the piezoelectric wafer; a control panel which is arranged in the aluminum shell, wherein a gap is formed between the control panel and the piezoelectric wafer, the control panel is electrically connected with the piezoelectric wafer, filler is arranged between the control panel and the piezoelectric wafer, and the filler absorbs sound signals; and a damping material which is loaded in the aluminum shell, wherein the wall thickness of the end, provided with the piezoelectric wafer, of the aluminum shell is 0.2 mm to 0.4 mm. According to the invention, electric energy and sound energy are mutually converted through the piezoelectric wafer, ultrasonic waves are emitted for detection, and the wall thickness of the end, provided with the piezoelectric wafer, of the aluminum shell is 0.2 mm to 0.4 mm, so that the loss of the sound energy is reduced, the vibration frequency of the sound energy is better matched with the vibration frequency of the ultrasonic waves, the detection distance is farther, and collision prevention is better carried out.

The invention relates to the technical field of power cables. The invention further discloses a high-performance double-layer co-extrusion insulating flame-retardant fire-resistant computer cable. Thecable comprises conductors, insulators, a wrapping tape, an inner sheath, an armor and an outer sheath. The insulators are arranged on the outer sides of the conductors and are made of polypropylenematerials, the plurality of conductors are embedded in the wrapping tape, fillers are embedded among the conductors in the wrapping tape, the inner sheath is arranged on the outer side of the wrappingtape, and the armor is arranged on the outer side of the inner sheath. According to the high-performance double-layer co-extrusion insulating flame-retardant fire-resistant computer cable, the insulators at the outer sides of the conductors are made of a polypropylene material; therefore, the heat resistance, rigidity and tensile strength of the cable are improved; and the armor is a linkage armor made of an aluminum alloy belt, and compared with a common double-steel-belt wrapping mode adopted by a common cable, the aluminum alloy belt and a non-magnetic material adopted by the linkage armordo not generate eddy currents, and the heat dissipation performance, the side pressure resistant performance and the anti-collision performance are good, , the inside is smooth and the insulator is not cut, and the safety coefficient is high.

The invention discloses a fruit and vegetable cultivation box with anti-collision function. The middle part of the box is fixedly connected with a slider matching the chute, and the slider is clamped in the chute, and two groups of symmetrical gaps are opened on the inner wall of the cultivation box. The fruit and vegetable cultivation box with anti-collision function is provided with a gap inside the cultivation box, a fixing seat is arranged inside the gap, and a buffer rod, a clamping block, a clamping groove and a spring are arranged inside the fixing seat, and the spring The elastic force, under the joint action of the clamping groove and the clamping block, can make the buffer rod always push the buffer plate close to the cultivation box. When the cultivation box is hit by an external force, it can stabilize the cultivation box, and the anti-collision performance is good. The fruit tree seedlings are effectively prevented from being damaged due to external force collisions, and the cultivation efficiency is improved.

The invention discloses a traction drive multi-car shared multi-hoistway circular operation elevator. The elevator is composed of a multi-hoistway structure, multiple independent operation cars, multi-layer stacked traction rope guide wheel translation driving parts, multi-layer stacked car rope hitch firmware translation driving parts, multi-layer stacked traction machines and multiple counterweight rope hitch firmwares, wherein the multi-hoistway structure comprises four vertical operation hoistways, one upper translation hoistway, one lower translation hoistway, multiple independent counterweight vertical up-and-down movement spaces, a multi-layer guide wheel and car rope hitch firmware translation driving part supporting frame and a multi-layer traction machine and counterweight rope hitch firmware supporting frame. According to the elevator, all the cars are driven by the traction machines and translation driving devices to do vertical and upper and lower translation operation, guide wheels of the translation driving parts and traction ropes on the rope hitch firmwares are driven to do horizontal and longitudinal translation through horizontal translation driving devices and longitudinal translation driving devices, so that multiple cars can share the hoistways for circular operation, the elevator is a multi-hoistway circular operation elevator capable of integrating existing technologies, and the hoistway utilization rate can be increased.

The invention discloses an air purifier with anti-collision function, which comprises a base, the upper surface of the base is provided with a groove, the inner bottom wall of the groove is fixedly connected with fixed seats arranged equidistantly, and each fixed seat The upper surface of each cavity is provided with cavities, and the inner side wall of each cavity is provided with two symmetrical slide grooves, and the inside of each cavity is placed with a support rod suitable for the cavity. The air purifier with anti-collision function can increase the stability of the purifier body by arranging a base under the purifier body, and can increase the friction of the base by arranging an anti-skid block on the bottom surface of the base to prevent the purifier body from Falling over due to collision ensures that the main body of the purifier is not damaged. By setting a fixed seat and a support rod inside the base, under the action of the chute and the slider, the elastic force of the second spring can be used to prevent the main body of the purifier from being damaged. The external force collision is buffered, and the anti-collision effect is better.

The invention discloses a low-voltage distribution reactive compensation comprehensive distribution box, which belongs to the technical field of distribution boxes, and comprises a box body, a driving motor, a side water tank, a heat removal and ash removal assembly, an electric air pump, an exhaust assembly, a transmission gear and an inner protection plate, and a box door is mounted outside the box body through a hinge. According to the power distribution box, the inner protection plate is installed inside the power distribution box, in the normal use process of the power distribution box at ordinary times, if the outside generates huge impact force on the front face of the power distribution box, the limiting convex shafts will be squeezed into the installation grooves of the transmission gears, and the two inner protection plates move in the same direction through the transmission effect; the two inner protection plates are instantaneously combined to form a high-strength protection surface, a sound anti-collision surface is formed for reactive compensation electrical elements in the distribution box at the moment when impact force is applied to the box door, a good protection effect is generated for the elements, meanwhile, the design can also prevent some lawbreakers from maliciously damaging the box door, internal components are protected, and the using effect is improved.

The present invention discloses a method for stabilizing a tapping temperature based on ladle automatic positioning, belonging to the metallurgy field. The method comprises the steps that: based on the radio frequency identification technology, card readers are installed at positions where a ladle is operated, and a plurality of electronic tags are installed at front, back, left and right outer surfaces of the ladle; the card readers perform identification of the ladle when the position of the ladle is changed; a homemade algorithm is employed to calculate the temperature of the ladle based oninformation such as the position of the ladle and the initial temperature of the ladle; temperature loss of liquid steel is obtained when tapping according to different ladle temperatures; the liquidsteel temperature of a converter smelting terminal point is dynamically regulated to balance the temperature loss; and finally, a stable tapping temperature of the liquid steel in the ladle is obtained. The method for stabilizing a tapping temperature based on ladle automatic positioning overcomes defects that it is difficult to stabilize the tapping temperature of the liquid steel and productionstability is influenced, stabilizes the tapping temperature of the liquid steel, ensures the stability of the production rhythm, obtains a stable casting temperature for follow-up continuous castingand ensures stability of the casting blank quality.

The invention discloses a multifunctional heat-proof oil tank, which comprises an oil tank, wherein the outer surface layer of the oil tank is provided with one or more heat insulating layers; one or more hermetic cavities are formed between every two adjacent heat insulating layers as well as between the oil tank and each heat insulating layer; a heat insulating medium is arranged in each hermetic cavity; and a temperature sensor is also arranged in the hermetic cavity. Due to the adoption of the oil tank, the influence of external temperature on fuel oil is reduced greatly, and heat proofing, freezing proofing, collision proofing and explosion proofing are realized.

The invention provides an assembly type crash barrier connection system for a sharp turn, belonging to the field of road traffic facilities. A plurality of stand columns are arranged outside the sharpturn, two crooked connection handrails are arranged between two stand columns in the middle, a plurality of rotational energy consumption barrels are arranged between the two crooked connection handrails, two ends of the crooked connection handrails and the stand columns are connected and fixed, a plurality of connective fixing rods are arranged on the crooked connection handrails, outer barrelsand inner barrels are arranged in the rotational energy consumption barrels, rubber energy consumption layers are arranged between the outer barrels and the inner barrels, the internal spaces of the inner barrels are hollow areas, two ends of a light-weight energy consumption buffer guardrail plate and the stand columns are connected and fixed by connecting pieces, and a transitional connection rubber column is arranged between the light-weight energy consumption buffer guardrail plate and the rotational energy consumption barrel which is close to the light-weight energy consumption buffer guardrail plate; the beneficial effect is that the installation and operation of the system are remarkably simplified, the assembly speed is fast, the construction is simple, the construction cost is low, and the industrialized disassembly is quite convenient.

A steel battery pack shell of a new energy automobile comprises a body which is a frame body, and at least one cross beam is arranged in the frame body in the length direction; the frame body is made of a hollow closed profile with a special-shaped section, and the hollow closed profile with the special-shaped section is composed of an upper cavity and a lower cavity which are formed by rolling or stamping and welding a plate blank; the upper cavity positioned at the upper part of the profile is of a triangular or quadrilateral structure, and the top surface of the upper cavity is a matching surface connected with a steel battery pack shell cover plate; the lower cavity positioned at the lower part of the profile is an L-shaped cavity; and the cover plate and the bottom plate are respectively arranged on the upper end surface and the lower end surface of the body frame body and are connected with the body frame body through processes such as screw joint, glue joint or welding. The weight and the cost of the steel battery pack shell applying the ultrahigh-strength steel are lower than those of an existing aluminum or steel battery pack shell under the same design requirement.