192results about How to "Meet the cost" patented technology

The invention discloses an intelligent charging method. The intelligent charging method includes detecting state of charge of a patrol robot; sending a pre-charge request when the detected state of charge is lower than the set threshold value; establishing the marriage relation according to the received per-charge request; verifying identity of the patrol robot within the charging range based on the established marriage relation; starting a charging power supply for the verified patrol robot. According to the arrangement, special charging request of the patrol robot is met through methods including charging reserve and start and stop controlling of the charging power supply, the problem that multiple patrol robots need to be charged is solved, low-carbon and energy-saving effect is achieved, wireless charging technology is adopted, charging efficiency is improved, and element cost is lowered; manual work is free during the whole charging of the patrol robot, and the actual automation and intelligentization is realized. The invention further provides an intelligent charging system, the patrol robot and the charging power supply.

The scheme of the invention discloses a vehicle assistance driving system based on the infrared thermal imaging and millimeter wave radar technology. The main functions include pedestrian and vehicledetection, image and sound fusion and collision early warning in driving of the vehicle. The early warning system uses the following technical characteristics: the infrared camera and the millimeter wave radar specialized for vehicle-mounted assistance driving, the data acquired by the radar, such as the distance, the direction and the speed and the images acquired by the infrared camera are fusedfor screening and determining the pedestrians or the vehicles, the pedestrian or vehicle characteristics are extracted through the algorithm, finally the result is displayed on the visual interface and multidimensional early warning information including images, numbers and sound is provided.

The invention discloses an automatic driving-oriented edge computation resource management method. The method comprises the following steps of: carrying out uniform management and dynamic distributionon edge-side resources according to a demand, for computation resources, of an automatic driving business, so as to realize real-time interaction with an autonomous vehicle; migrating the computationto an edge computation node; and storing mass automatic driving data according to a customer demand so as to relieve the pressure, for computation and storage demands, of the vehicle. Compared with the prior art, the method has the advantages that the computation, storage and network resources of edge sides are pooled to form transparent and high-availability resource infrastructure nodes, so that high-availability computation ability is provided for automatic driving businesses, and large-capacity and low-cost storage services and edge side high-speed network services are provided at the same time; resource isolation between businesses and data is realized, and resource switching is dynamically completed, so that the computation, storage and network are respectively charged as required and then the charging is more reasonable; the value maximization of the computation and storage resources is realized; and the automatic driving efficiency is improved.

The present invention relates to a method and device for extraction of a rod-shaped ground object. The method comprises: obtaining three-dimensional laser point cloud data, and removing low spatial points in the three-dimensional laser point cloud data to obtain a candidate point cloud set; dividing the candidate point cloud set to obtain an independent point cloud set corresponding to an independent ground object; identifying the rod-shaped ground object point cloud set in the independent point cloud set according to the projection of the independent point cloud set on a horizontal plane; and performing line extraction of the rod-shaped ground object point cloud set, and obtaining the upper and lower end points of the rod-shaped ground object according to the extracted elevation of the rod-shaped ground object point cloud on a straight line so as to effectively ensure the precision of the extracted rod-shaped ground object and satisfy the requirement of a high-precision map.

A method for continuous microwave expansion of cut tobacco comprises the following steps: impregnating the cut tobacco in an expanding agent; recycling the expanding agent in an impregnating device after impregnation; carrying out microwave expansion on the impregnated cut tobacco by a microwave dryer to obtain the expanded cut tobacco. The expanded cut tobacco comprises one or more than two components of ethanol with 4-12 carbon atoms, ketone with 4-12 carbon atoms, halogenether with 2-12 carbon atoms, alkane with 3-12 carbon atoms or alkane with 3-12 carbon atoms substituted by 2 halogen atoms. The filling value of the expanded cut tobacco reaches above 7.5, the cutting ratio is above 90%, the moisture content after expansion is 12-13%, the expansion of the cut tobacco is even without water damaged cut tobacco; the whole set of devices has low energy consumption and high automation, and continuous closed mass production can be carried out.

The invention discloses a navigation robot obstacle detection method and system. The system mainly comprises an ultrasonic detection module, an ultrasonic scanning module, an infrared detection compensation module and a robot core control module, wherein the ultrasonic detection module is mainly realized by amplifying a 40 kHz high-voltage driving signal and an ultrasonic receiving signal. The module is erected on a scanning steering engine to realize front non-dead-angle 180-degree scanning detection. By combining infrared range finding, the compensation of a navigation robot ultrasonic blind region is realized. A driving circuit is realized by establishing an H bridge with a field effect transistor. In a navigation robot, planar multi-point sensing is realized by using a pair of ultrasonic probes; the range finding range can reach 5.9 m at farthest; and a detection blind region is reduced to 2 cm. The system has the characteristics of low cost, small detection blind region, high anti-diffraction capacity, high real-time property and the like and has broad industrialization prospect. The method and the system can be used for the fields of micro robot navigation, environmental detection, intelligent vehicle active safety and the like.

The invention discloses a touch module and a manufacture method thereof. The touch module comprises a touch induction layer and a cover plate, wherein the upper surface of the cover plate is in an arc-shaped curved surface structure; the touch induction layer is integrally arranged on the lower surface of the cover plate in an in-mold forming mode; and an arc-shaped curved surface shell with a touch induction function is formed by the touch induction layer and the cover plate. The manufacture method for the touch module comprises the following steps of providing the cover plate which is provided with an upper surface and a lower surface with the arc-shaped curved surface structure; arranging the touch induction layer; and arranging the touch induction layer on the lower surface of the cover plate in an integral forming mode by the in-mold injection forming technology to form the arc-shaped curved surface shell with the touch induction function. According to the touch module disclosed by the invention, the touch induction layer and the cover plate can be directly combined to form the integral-forming shell with the arc-shaped curved surface structure by the in-mold injection forming technology, thereby being favorable for satisfying the requirements of thin and light property, high performance and diversified appearance of a touch panel.

The invention discloses a solar cell module based on a glass conductive backboard and a manufacturing method of the solar cell module. The solar cell module is simple and reliable, low-cost common glass and the processing techniques like mature glass coating and sand blasting are utilized, an existing expensive backboard (a copper-clad plate) and existing complex photolithography are replaced, requirements for packaging techniques of low-cost and large-capacity back contact cell modules are met, and curve of battery pieces caused by high-temperature welding is avoided. Water and steam are prevented from affecting metal films and the battery pieces by means of protection of double-surface glass, and using reliability of the module is improved. Therefore, the solar cell module based on the glass conductive backboard and the manufacturing method of the solar cell module are particularly suitable for industrialization of the back contact cell modules.

The invention relates to a water quality in-situ pre-treatment method in a water source region. According to the method provided by the invention, a water channel is arranged according to a terrain of the water source region by taking a water fetching opening of a water supply plant as an end point, a photocatalytic purification region, a combined ecological floating bed purification region and an aquatic plant purification region are separately arranged along the water channel, and in-situ pretreatment is carried out on an inflow of the water supply plant in the water channel. The water channel is enclosed by isolating barriers, and a block for intercepting garbage and floating plants is arranged at the water inlet end of the water channel. The three purification regions can be combined in adaptation to local conditions. Compared to the prior art, the method provided by the invention effectively couples four in-situ water quality purification technologies: photocatalysis, ecological floating bed, ecological contact oxidation filler and plant repair. The method is simple in structural design, low in material cost, small in interference by construction and operation on the outside world, simple to maintain and manage, free of additional added chemical agents and safe and free of secondary pollution and can be used for effectively improving the inflow water quality of the water supply plant, so that the main water quality indexes are enhanced by at least one grade.

A method, apparatus and system are disclosed for utilizing a mechanical air redirection device with air cooled computer assemblies in order to evenly distribute airflow to provide balanced cooling of heat producing components, such as memory chips and boards. The present invention improves the thermal distribution and dissipation of heat for computer and memory systems when some memory devices are removed or left uninstalled.

The invention relates to a modern agricultural production technology for pollution-free organic vegetables, in particular to a method for producing original ecological organic vegetables. In the method, a fermenting liquid fertilizer, electrolytic functional water and physical light induced insecticidal control are comprehensively applied to the whole process of pollution-free organic vegetable production. The contradiction between quantity and quality in vegetable production is solved. By using the method for planting the vegetables, the sanitation and the safety of the vegetable are guaranteed, the vegetable yield is improved, and the income of farmers is increased; by adopting the method for planting the vegetables, no pesticide residue and no environmental pollution are achieved, and soil can be improved; therefore, the method is favorable for sustainable development. Chemical pesticides are replaced by the electrolytic functional water and a germicidal lamp, so that the damage tothe body of farmers caused by of spraying pesticides is stopped and civilized production requirements are met. Compared with other pollution-free organic vegetable planting methods and conventional production methods of chemical agriculture, the method for producing the original ecological organic vegetables also has the advantages of convenience for use, labor and time conservation, low cost, good effect and the like.

The invention discloses a service-oriented industrial production control and monitoring method and system. The system is mainly formed by intelligent devices, an intelligent device control and acquisition module, local control platform servers, local control platform clients, a cloud platform server, and a cloud platform client. Services provided by different production server providers are combined and planned by high-efficiency production process planning, local control platforms and a cloud platform perform graded monitoring and information sharing on the intelligent devices, each local control platform dynamically updates fault determination conditions to the cloud platform, the cloud platform performs synchronization with the local control platforms regularly, the learning ability and the online upgrading ability of the intelligent devices can be improved, the fault detection ability and the fault early warning ability of the intelligent devices are improved, the system represents combination of intelligent production, intelligent factories, and intelligent business, the production management is more efficient, and the system is an important composition of intelligent manufacture.

The invention belongs to the field of function materials and particularly relates to an amorphous-nanocrystalline composite magnetic power core and a production method thereof. The amorphous-nanocrystalline composite magnetic power core is mainly made of iron-based amorphous powder, iron-based nanocrystalline powder, organic binder, and insulating agent. The insulating agent is a mixture of inorganic oxide, carbide and nitride. The organic binder and the insulating agent account for 0.5-2wt% and 0.5-4wt% of total weight of the two powders respectively. The production method includes: amorphous strip embrittlement, mechanical breaking for powdering, screening, passivation and insulation coating, die pressing, and heat treatment. The amorphous-nanocrystalline composite magnetic power core has excellent soft magnetic properties, thermal stability and mechanical strength under medium and high frequencies, and can be massively used for various inductive components, such as filters, current regulators and energy storage components, on various switch power modules.

The invention discloses an encryption method for an error learning problem in ring domain and a circuit. The method comprises the following steps: sampling a polynomial and a noise polynomial and performing the number-theory transformation; operating the result after the number-theory transformation, obtaining a public key and a ciphertext, and completing the encryption of the to-be-encrypted information. The invention also discloses a circuit to realize the method and the circuit comprises: an encryption controller, a to-be-encrypted information storage device, a Gaussian sampling module, a read-only storage device, a Gaussian data storage module, a number-theory conversion processor, an iterative modular multiplication module and a ciphertext storage module. The Gaussian sampling module samples and generates a polynomial and a noise polynomial; the number-theory conversion processor is used to perform the number-theory transformation to the polynomial, the noise polynomial and the constant polynomial and to generate the ciphertext after operations on the to-be-encrypted information, the noise polynomial and the public key. The method and the circuit of the invention greatly increase the operational efficiency of the circuit, reduce the loss of the circuit, and ease the realization cost of an encryption circuit for the error learning problem in ring domain.

The invention relates to a low-current line selection device and a control method for inhibiting unbalanced current by way of differential filtration. The low-current grounding line selection device comprises a multi-channel alternating-current sampled signal input interface, an operational amplifier filter module, an analog / digital conversion module, a central processor module, a power module, a human-computer module and a communication module, wherein the multi-channel alternating-current sampled signal input interface, the operational amplifier filter module and the analog / digital conversion module are sequentially connected, the analog / digital conversion module, the human-computer module and the communication module are respectively bidirectionally connected with the central processor module, and the power module is connected with each part to supply power. The device adopts a zero-sequence current differential filtration algorithm which can effectively extract zero-sequence current fault component, and therefore can effectively extract the zero-sequence current fault component in a high-unbalanced current power supply system during normal operation, and thereby the line selection accuracy of the low-current grounding line selection device can be increased.

The invention discloses a workflow group scheduling method in multi-cloud environment and based on embodiment self-adaptive distribution and integration. The method includes that workflow tasks are compressed by means of preprocessing, so that execution time of an algorithm is reduced; a task deadline dynamic dividing method based on embodiment execution performance is designed, so that utilization rate of execution embodiments is increased from the local level of single workflow; corresponding execution embodiment resources are dynamically distributed and integrated on the basis of performance needs of a current workflow group, so that the execution embodiment utilization rate is increased globally, and cost expenditure is reduced; task sets are dynamically scheduled onto corresponding embodiments for execution according to a principle of prioritizing latest deadline, so that each task is ensured to be executed completely before a corresponding sub deadline. The method is utilized toconduct in-depth study on optimization scheduling and embodiment self-adaptive distribution and integration of workflow groups with deadlines locally and globally, so that the performance needs of theworkflow groups are met while resource utilization rate is increased, and execution cost expenditure is lowered.

A ''short-range overloading vacuum prepressing---dynamic discharging consolidation combination method'' to dealing with the soft soil ground foundation, its features are : overloading prepressing the vacuum membranes of conventional vacuum prepressing method with covering water; proceeding the settlement observation to each settlement observation points according the vacuum prepressing operating rules, continuing prepressing 5~10 days after the prepressing settlement above 80% of calculate settlement, then stopping the water overloading vacuum prepressing after ensuring stable completely; removing the vacuum membrane and sun-curing 1~2 days, then proceeding the dynamic dewatering consolidation to eliminating the stored water in sand cushions which is leaved when overloading vacuum prepressing rapidly, then dynamic consolidation or roller compaction after the water level below 1.5m. Its beneficial effects are: it can eliminate the water in muck soil during a short time and enhance the consolidation degree; it makes the skin soil layer get the greatest density, meets the requirements of load bearing capacity and rigidity rapidly and prevents rebound phenomenon; it shortens the construction period and lowers the costs and applies to large area project filling soil recently which has large thickness saturated soft soil particularly.

The invention provides a Fenton printing-dyeing-wastewater deep treatment method. The Fenton printing-dyeing-wastewater deep treatment method includes the steps that 1, pretreated wastewater flows into a Fenton chemical feeding pond, and ferrous sulfate, hydrogen peroxide and sulfuric acid are sequentially put into the Fenton chemical feeding pond; 2, the wastewater flows through three boxes of the Fenton chemical feeding pond to enter a Fenton reaction pond, the mixture is sufficiently stirred in the Fenton reaction pond to be subjected to a Fenton reaction, and the wastewater obtained after the Fenton reaction is subjected to aeration treatment and then enters a flocculation pond; 3, alkali is added into the flocculation pond, the PH value is adjusted to 6.5 to 7, and polymeric flocculants are added to carry out a flocculation reaction; 4, the wastewater in the flocculation pond enters a settling pond to be subjected to mud-water separation after being subjected to the flocculation reaction, and the settling time ranges from 2.5 h to 3.0 h. The Fenton printing-dyeing-wastewater deep treatment method has the advantages of being high in practicability, efficiency, reliability, stability, automation degree and the like; treatment cost is low, running and operation are easy and convenient, and the removing rate is high and stable.

The invention discloses a thick-specification wide X65M pipeline steel hot-rolled rolled plate and a manufacturing method thereof. The hot-rolled rolled plate is prepared from, by mass percent, 0.06%-0.08% of C, not larger than 0.25% of Si, 1.45%-1.60% of Mn, 0.045%-0.055% of Nb, 0.020%-0.030% of Ti, 0.25%-0.35% of Cr, 0.09%-0.12% of Mo, 0.020%-0.050% of Alt, not larger than 0.015% of P, not larger than 0.008% of S and the balance Fe and inevitable impurities. The thick-specification wide X65M pipeline steel hot-rolled rolled plate is designed through C-Mn-Nb-Ti-Cr-Mo alloy ingredients, and the hot-rolled rolled plate with low cost and excellent comprehensive performance is obtained in combination with a clean steel smelting and TMCP controlled rolling and controlled cooling process.

The invention provides a preparation method of kiwi fruit powder. The preparation method includes the steps that after kiwi fruits are subjected to vacuum freeze drying in a vacuum freeze drying device, seed-pulp separation is carried out in a low-temperature seed-pulp separation device; vacuum freeze drying specifically includes the procedures that a temperature probe is placed in a sample disc containing the kiwi fruits, quick freezing is carried out on the kiwi fruits, the refrigeration rate is reduced to range from -20 DEG C to -30 DEG C from the room temperature of +25 DEG C, operation is completed within 2-3 hours, the kiwi fruit slices are frozen, the state is kept for 30 min to 2 hours, and then lyophilization is carried out; obtained pulp is smashed in a low-temperature pulp low-speed smasher, and the kiwi fruit powder is obtained. The method is simple in preparation process, and the content of vitamin C in the kiwi fruits can be reserved to the maximum degree.

The invention discloses a spread spectrum code synchronous transmitting method and a spread spectrum code synchronous transmitting device and belongs to the technical field of wireless signals. The method comprises the following steps that external spread spectrum signals are obtained; a group of local codes are locally generated and are respectively multiplied and integrated with external spread spectrum signals, the quadratic sum is obtained according to integral results, the integral power value is obtained, and the local code with the maximal integral power value is used as a matching local code; E, P and L matching local codes are generated and are respectively multiplied and integrated with external spread spectrum signals, the quadratic sum is obtained according to integral results, three paths of integral power values are obtained, and the phase difference is obtained according to the three paths of integral power values; the matching local code when the phase difference is zero is used as a capturing local code; and synchronous transmitting codes are generated according to the capturing local code and are sent. The method and the device have the advantages that the synchronous transmitting of the transmitting codes and the external spread spectrum signals can be realized, the limitation of spread spectrum code synchronization on the network structure and scale is reduced, and the demands of networks on high synchronization precision, simple structure and low cost are met.

A project management scheduling method applies critical path scheduling to separate the duration of each activity of the project into a group of segmented time segments attached to each other. The computer implemented method converts all activity relationships into finish-to-start between time segments without lead or lag times and corrects float and critical path calculations. Additional time segments representing daily events having either a positive or negative effect on time segment duration can be inputted and the project schedule adjusted accordingly. The method can also be employed in the conversion of existing critical path method scheduling systems.

The invention belongs to the technical field of concrete preparation, and in particular, relates to frost-resistant and crack-proof concrete suitable for one-time forming of a super high face plate rockfill dam face plate, and a preparation method and an application thereof. The concrete includes cement, a mineral additive, a shrinkage reducing agent, a water reducing agent, an air entraining agent, an expansive agent, mixed fibers, an aggregate mixture and water. Through adjusting and choosing the composition and proportion, the frost-resistant grade of the obtained concrete exceeds F400, thecrack-proof grade is grade I, and the anti-permeability ability is not lower than W12 grade. The collapsibility of newly blended concrete prepared by the method is controlled at 50-70 mm; no separation phenomenon of slurry and a skeleton exists in a process of chute pouring, and the requirement of continuous pouring of the face plate rockfill dam face plate. In addition, the amount of the cementand the mineral additive in the concrete and the water-binder ratio of the concrete are optimized by a calculation formula obtained from extensive experiments and summaries, so the repeated experiments and adjustment processes required in preparation of traditional face plate concrete are omitted and the process of determination of the mixing proportion is simplified.

The invention discloses a working method for logistics management terminal, and the method comprises the following steps: providing power to a system; initializing an acquisition terminal; acquiring data by a main control module respectively through a real-time clock module, a data uploading and positioning module, a temperature and humidity measurement module and an impact angle measurement module; determining by the main control module whether to send the data or not; and in the standby situation through the main control module, shutting down some nonworking modules, entering a sleep mode and waiting for the next wake-up. According to the modularized design of the management terminal, the modules, independent from each other, are coordinated and controlled by a main control module. This improves the working efficiency and reliability of the management terminal, and facilitates debugging and maintenance.

The invention provides a refrigerator, a control method and a control device. The refrigerator comprises a door, an induction lamp, a photosensitive sensor, an infrared sensor, a switching button and a controller, wherein the induction lamp, the photosensitive sensor, the infrared sensor, the switching button and the controller are arranged on the door, the induction lamp, the photosensitive sensor, the infrared sensor and the switching button are all electrically connected with the controller, the photosensitive sensor is used for detecting the intensity of environmental illumination around the refrigerator, the infrared sensor is used for detecting the movement condition of a human around the refrigerator, the controller is used for sending a control command to the switching button according to at least one of the detection result of the photosensitive sensor, the detection result of the infrared sensor and the current time, and the switching button is used for switching control modes of the induction lamp according to the received control command so that the on-off state of the induction lamp can be controlled. By means of the technical scheme, the requirement of a user for flexibly adjusting the control modes can be met while cost is not increased, user experience is improved, and the cost performance of the induction lamp is improved.

A structure comprises a liquid crystal display body, a base including the first frame for placing and containing display body, a cover including the second frame integrated with the first one for covering on the base, multiple fixing hole surrounding periphery of the second frame, multiple concave opening at bottom edge of the second frame, multiple projection component fixed on the first frame periphery corresponding to position of multiple fixing hole and checked together with these holes and multiple positioning block component fixed at bottom edge of the first frame corresponding to position of multiple concave opening for protecting display body from damage by over pressing down of the second frame.

The invention discloses an onboard PCB inverted-F antenna 2.4 GHz radio frequency communication module. The module comprises a PCB antenna connected with a matching circuit and is an inverted-F antenna; the inverted-F antenna comprises a radiation body 3, a grounded end 1 and a feed-in end 2. The ground end extends downwards from one end of the radiation body. One end of the feed-in end is connected with the radiation body, and the other end of the feed-in end is connected with a radio frequency module. The onboard PCB inverted-F antenna 2.4 GHz radio frequency communication module has the advantages that cost is low, power consumption is low and long-distance transmission is achieved, the problem that communication performance of nodes in industrial internet-of-things communication is poor is solved, and the special requirements for a micro type, low cost, low power consumption and long-distance transmission of the wireless communication nodes are met.

The invention provides a sensitive material for detecting acetone gas. The sensitive material is prepared by compounding a WO3 nano-sheet with C3N4, wherein the WO3 nano-sheet is used as a matrix, C3N4 is used as sensitizer, and the mass percentage of C3N4 in the sensitive material is between 0.5wt% and 10wt%. The invention also provides a preparation method of the sensitive material, which comprises: preparing an ultra-thin WO3 nano-sheet by a self-assembly method; ultrasonically peeling prepared C3N4 in a solvent to obtain a dispersion liquid; and dropwise adding the dispersion liquid to theWO3 nano-sheet layer according to the mass percentage to form a composite gas sensitive material. According to the invention, the acetone detection performance of the sensitive material is improved by modifying the WO3 nano-sheet with C3N4 with a two-dimensional layered structure. A gas sensitive test result shows that the gas sensitive element has the advantages of high sensitivity to acetone vapor, fast response recovery, good anti-interference ability, good stability and the like, and can be used to selectively detect acetone gas in respiratory gases.

The invention provides an optical right-angle reflector and a manufacture method thereof. The method is used for manufacturing the optical right-angle reflector on a monocrystal silicon substrate, and comprises the steps of forming an etching mask on the surface of the substrate, wherein the etching mask comprises an opening for exposing the surface of the substrate, and the substrate is the monocrystal silicon substrate; wet etching the substrate with the etching mask to form an etched groove, wherein the etched groove at least comprises two side walls perpendicular to each other, the two side walls are silicon (110) crystal faces, and an included angle between each of the two side walls and the surface of the substrate is 45 degrees; and covering optical reflecting layers on the two side walls of the etched groove to form the right-angle reflector in the etched groove. The optical right-angle reflector manufactured according to the method provided by the invention is good in optical quality, high in precision, small in size and low in cost, a multi-groove right-angle reflector array can be conveniently manufactured, and thus the right-angle reflectors with large area can be acquired.

The invention provides a battery pack cooling device and a battery module using the same. The battery pack cooling device comprises at least one heat collection plate, at least one circulating pipeline, a cooling fin and an electromagnetic pump, wherein the heat collection plate clings to a battery pack to be cooled and is used for absorbing the heat of the battery pack to be cooled; the circulating pipeline is filled with liquid metal and is partially embedded in the heat collection plate; the cooling fin is connected with the circulating pipeline; the electromagnetic pump is used for providing magnetic field rotation powder for the liquid metal so as to drive the liquid metal to flow in the circulating pipeline in a circulating way. The battery pack cooling device adopts a way of combining the circulation cooling of the liquid metal with the cooling fin, so that the heat generated by the battery pack can be rapidly and effectively transferred into the outside; the battery pack cooling device is compact in whole structure and high in heat conduction efficiency, and is safe and reliable; furthermore, the liquid metal is driven by the electromagnetic pump, so that the driving efficiency is high, the energy consumption is low, the service life of a pump body is long, the cost of the cooling device is lowered, and the cooling requirement of the battery pack can be met.