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83results about How to "Reduced risk of thermal runaway" patented technology

Lithium battery and manufacturing method thereof

The invention provides a lithium battery. The lithium battery comprises a positive electrode plate, a negative electrode plate, a separator and electrolyte solution, wherein the separator is positioned between the positive electrode plate and the negative electrode plate for defining an accommodating area in which the electrolyte solution is positioned; a thermal actuation protection film is arranged on a material surface of the positive electrode plate or the negative electrode plate; and when the temperature of the lithium battery rises to the temperature for the thermal actuation, which isabout 80 to 280 DEG C, the thermal actuation protection film undergoes cross linking reaction to prevent thermal runaway so as to further prevent the battery from exploding. The invention also provides a manufacturing method for the lithium battery.
Owner:IND TECH RES INST

Power battery top cover and power battery using top cover

The invention belongs to the technical field of power batteries, and especially relates to a power battery top cover and a power battery using the top cover. The power battery top cover comprises a top cover sheet, and a firs pole pillar, a second pole pillar, a pressure release valve, a liquid injection hole, pneumatic overturning sheets and a resistor block, the first pole pillar is in insulation connection with the top cover sheet, the second pole pillar is electrically connected with the top cover sheet through the resistor block, the pneumatic overturning sheets are electrically connected with the top cover sheet, the conductive block is arranged above the pneumatic overturning sheets, a baffle plate is arranged under the pressure release valve, the pneumatic overturning sheets comprise a first pneumatic overturning sheet and a second pneumatic overturning sheet, and the thickness of the first pneumatic overturning sheet is smaller than the thickness of the second pneumatic overturning sheet; and when the pressure in the power battery increases, the pneumatic overturning sheet and the second pneumatic overturning sheet sequentially move upward in order to electrically connect the first pole pillar with the second pole pillar. Compared with power battery top covers in the prior art, the power battery top cover disclosed in the invention makes the power battery have an excellent safety protection function in overcharging, nailing, short circuit and hot box test.
Owner:东莞永蓝电子科技有限公司

Shielding gas charging battery pack suitable for new energy automobile

The invention relates to a shielding gas charging battery pack suitable for a new energy automobile. The battery pack comprises a battery pack shell (2) and a battery pack body (1) in the battery packshell (2). The device further comprises a gas cylinder (12), a sensor and an MCU (13), wherein the gas cylinder (12) is filled with protective gas and is communicated with the interior of the batterypack shell (2) through the gas valve (11), the sensor is respectively connected with the battery pack shell (2) and the MCU (13), the MCU (13) is connected with the gas valve (11), and the MCU (13) monitors the state of the interior of the battery pack shell (2) through the sensor and controls the opening and closing of the gas valve (11). Compared with the prior art, the battery pack is filled with protective gas, so that air can be isolated under the condition that the structural weight is not increased, and a flame-retardant effect is achieved; Gas can flow forcibly to enhance the heat dissipation effect; And a gas supplementing system is arranged to cope with gas leakage.
Owner:TONGJI UNIV

Electrode active material for lead-acid storage battery

InactiveCN106876667AHigh porosityInhibition of agglomeration and cloggingLead-acid accumulatorsCell electrodesSpecific energyMixed type
The invention discloses an electrode active material for a lead-acid storage battery. The electrode active material comprises lead powder and composite material granules; the lead powder comprises one or more kinds of metal lead powder, ball-milling lead powder, Barton lead powder, Pb<2>O powder, PbO powder, Pb<2>O<3> powder, Pb<3>O<4> powder and PbO<2> powder; and the composite material granules comprise one or more kinds of coating type composite material granules and mixed type composite material granules. By virtue of the electrode active material for the lead-acid storage battery with an improved formula, the specific power, specific energy, active material utilization rate, charging-discharging efficiency, cycle life, low-temperature performance and the like of the applied lead-acid storage battery can be obviously improved.
Owner:杨春晓

Feedback current control device and overhead working truck

ActiveCN112078368AAvoid the risk of lithium analysisReduce the probability of lithium analysisSpeed controllerCircuit monitoring/indicationElectrical batteryControl engineering
The invention relates to the technical field of engineering machinery, and discloses a feedback current control device and an overhead working truck. The feedback current control device comprises a feedback current capturing module, a first switch module and a control module, wherein the feedback current capturing module is located on a current capturing circuit and is used for capturing a feedback current; the first switch module is used for conducting or switching off the current capturing circuit; and the control module comprises a first receiving unit and a first control unit, and the first receiving unit is used for receiving a first voltage at one end of a driver on a power supply circuit, a second voltage at one end of a battery and the temperature of the battery, the first controlunit is used for executing the following operation according to the difference value of the first voltage and the second voltage and the temperature of the battery, under the condition that the difference value of the first voltage and the second voltage is greater than a preset voltage and the temperature of the battery is less than or equal to a preset temperature, the current capturing circuitis conducted by controlling the first switch module, and the feedback current is captured by the feedback current capturing module. According to the feedback current control device and the overhead working truck, the probability of lithium precipitation of the battery and the risk of thermal runaway of the battery can be greatly reduced.
Owner:ZOOMLION INTELLIGENT ACCESS MASCH CO LTD

Lithium battery system and overhead working truck

ActiveCN112259829AAvoid the risk of lithium analysisReduce the probability of lithium analysisCell temperature controlSecondary cells charging/dischargingControl theoryElectric current flow
The invention relates to the technical field of engineering machinery, and discloses a lithium battery system and an overhead working truck. The lithium battery system comprises a battery and a feedback current control device, wherein the feedback current control device comprises a plurality of current capture module groups, each module group comprises a heating module matched with the position ofa battery module and used for capturing feedback current, a first switch module used for conducting a current capture branch where the switch module is located, and a control module used for receiving a first voltage and a second voltage on a main circuit and the average temperature of the battery, controlling the first switch module in each current capture module group to switch on the current capture branch in which the first switch module is located when the difference between the first voltage and the second voltage is greater than a preset voltage and the average temperature of the battery is less than or equal to a preset temperature, and converting the feedback current into heat energy by the heating module to heat the corresponding module. According to the invention, the probability of lithium precipitation of the battery and the risk of thermal runaway of the battery can be greatly reduced.
Owner:ZOOMLION INTELLIGENT ACCESS MASCH CO LTD

Cylindrical power battery module

ActiveCN108110171ASolve the problem of low thermal stabilityImproved temperature distribution consistencySecondary cellsCell component detailsPower batteryHeat management
The invention discloses a cylindrical power battery module, and relates to the technical field of power battery heat management. The cylindrical power battery module comprises a ventilating device, breathing pipes, a battery pack top fixing disc, a battery module and a battery bottom fixing disc; the bottom surface of the battery module is fixed to the battery bottom fixing disc; the end of the battery module is fixed to the battery pack top fixing disc; the battery module consists of cylindrical batteries which are arranged neatly in lines and rows; the breathing pipes are mounted at gaps among the cylindrical batteries; through holes are formed in pipe bodies of the breathing pipes; one end of each breathing pipe is closed, and the other end of each breathing pipe is connected with the ventilating device in a closed manner; the ventilating device is mounted at the top of the battery pack top fixing disc; and a temperature sensor is arranged in the battery pack. The cylindrical powerbattery module is applicable to the technical field of power battery heat management, and can effectively reduce the temperature rise of the batteries of the battery pack, and improve the temperaturedifference consistency of various batteries of the power battery module.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Electric vehicle battery management system and method for managing power batteries by using same

InactiveCN112477691AAvoid decreased activityReduce the risk of high-pressure kinetic energyConverter typesElectric vehicle charging technologyAutomotive engineeringElectrical battery
The invention discloses an electric vehicle battery management system and a method for managing a battery by using the same, which can realize the real-time monitoring of the overdischarge of a storage battery and the temperature of a power battery, ensure the normal power supply of the storage battery and reduce the risk that high-voltage kinetic energy cannot be provided. The system comprise a low-voltage power supply module, a high-voltage power supply module and a direct-current transformer DC-DC; a battery management controller BMS is integrated with a power distribution system PDU, an electric heating device and a cooling device are arranged on the outer surface of the power battery, a temperature sensor is electrically connected with the battery management controller BMS, and the battery management controller BMS controls the electric heating device and the cooling device to adjust the temperature of the power battery according to temperature information of the temperature sensor. The battery management controller BMS is in communication connection with a cloud platform through a vehicle machine TBOX, and the method for managing the battery by applying the system comprises astorage battery control management method and a power battery control management method.
Owner:上海融和挚达智能科技有限公司

HEV soft package battery cell and battery pack

InactiveCN112349950AGuaranteed high rate charge and discharge capabilityGuaranteed powerFinal product manufactureLi-accumulatorsPlastic filmBattery cell
The invention provides an HEV soft package battery cell and a battery pack, the HEV soft package battery cell comprises a battery cell main body and a battery cell tab, the battery cell main body is provided with an aluminum-plastic film shell, and a pole group and an electrolyte which are sealed in the aluminum-plastic film shell, the battery cell tab is provided with a positive pole tab and a negative pole tab, one ends of the positive pole tab and the negative pole tab are positioned in the aluminum-plastic film shell and are connected with pole group, and other ends of the positive pole tab and the negative pole tab extend out of the aluminum-plastic film shell. The battery cell is characterized in that the battery cell main body is of a cuboid structure, the length L of the battery cell main body is smaller than or equal to 250 mm, the width W and the thickness H of the battery cell main body meet the conditions that 20%L <= W <= 60%, and 1%L <= H <= 5%L. According to the HEV softpackage battery cell, the high-rate charging and discharging capacity of the battery cell can be guaranteed, the power performance of the battery cell is guaranteed, the safety performance of the battery cell can also be improved, and the HEV soft package battery cell has good practicability.
Owner:SVOLT ENERGY TECHNOLOGY CO LTD

Diaphragm coating slurry capable of improving safety performance of lithium ion battery and preparation method of diaphragm coating slurry

The invention discloses diaphragm coating slurry capable of improving the safety performance of a lithium ion battery. The diaphragm coating slurry comprises the following raw materials in parts by weight: 20-35 parts of an inorganic insulator, 0.2-3 parts of a dispersing agent, 3-5 parts of a binder, 0.1-2 parts of a surfactant and 50-80 parts of water. The invention also discloses a preparationmethod of the diaphragm coating slurry capable of improving the safety performance of the lithium ion battery, and the lithium ion battery diaphragm prepared from the diaphragm coating slurry. The coating formed by the diaphragm coating slurry on the surface of the diaphragm can effectively maintain the pore structure in the diaphragm after impact, and ensures that the battery has more uniform lithium ion flow in the charge-discharge process, thereby enhancing the safety performance of the lithium ion battery.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY

Battery emergency disconnection system based on accurate measurement and use method

The invention discloses a battery emergency disconnection system based on accurate measurement. The battery emergency disconnection system comprises a high-voltage electric load, a processor unit anda battery, wherein the battery is electrically connected with a burning explosion type fuse and a copper bar; the burning explosion type fuse is electrically connected with a high-voltage electric load through the processor unit, the copper bar is electrically connected with a temperature sensor through the processor unit, meanwhile, the copper bar and the temperature sensor are electrically connected with a relay, and the relay is electrically connected with the high-voltage electric load. According to the battery emergency disconnection system, the loss of charging and discharging of the battery is reduced through an alternative scheme, the action time of the fuse is prolonged, the current coverage range of the fuse for battery protection is increased, and the thermal runaway risk of thebattery due to overcurrent is reduced.
Owner:的卢技术有限公司

Polymer electrolyte, preparation method thereof and application of polymer electrolyte in solid-state battery

The invention provides a polymer electrolyte, a preparation method thereof and application of the polymer electrolyte in a solid-state battery. Monomers of the polymer electrolyte comprise a cyclopentene structural monomer and an active hydrogen structural monomer, a main chain of the polymer comprises a cyclopentene structure and an active hydrogen group, and the polymer electrolyte is obtained by in-situ polymerization and curing of the cyclopentene structural monomer, the active hydrogen structural monomer, an initiator, a cross-linking agent and an electrolyte. The polymer electrolyte has excellent thermal stability, and can generate a chemical integrated interface with an electrode in a battery curing stage, so that the interface performance is improved. The in-situ polymerization curing method is adopted to prepare the in-situ curing electrolyte, so that the interfacial compatibility of the solid-state battery is improved, the manufacturing cost of the solid-state battery is reduced, and the performance of the solid-state battery is improved.
Owner:BEIJING WELION NEW ENERGY TECH CO LTD

Electrode plate as well as preparation method and application thereof

PendingCN114430019ASolve safety problems such as fire and explosionImprove securityNon-aqueous electrolyte accumulator electrodesElectrolytic agentElectrical battery
The invention provides an electrode pole piece and a preparation method and application thereof, the positive pole piece comprises a current collector and an active substance layer arranged on the surface of the current collector, the active substance layer comprises an active material, a conductive agent, a binder and a fluorophosphazene additive, and the oxygen index of the binder is gt; according to the invention, the oxygen index gt is adopted; the 95% high-flame-retardant resin binder has a high flame-retardant characteristic and is uniformly distributed in the pole piece, so that the high-flame-retardant fluororesin binder quenches a fire point in the first time under the condition that the battery is abused, the occurrence of thermal runaway in the battery is avoided, the risk of thermal runaway caused by internal short circuit after the battery is abused is greatly reduced, and the service life of the battery is prolonged. And the fluorophosphazene additive forms a stable SEI film on the surface of the positive electrode material during the first formation, so that the side reaction of the electrolyte and the high-nickel ternary positive electrode is inhibited, the service life of the battery is prolonged, and the safety of the battery is improved.
Owner:SVOLT ENERGY TECHNOLOGY CO LTD

Solid polymer electrolyte containing sulfonic acid or phosphoric acid derivative structure and its application in secondary lithium battery

The invention relates to a solid polymer electrolyte, and more particularly to a solid polymer electrolyte containing a sulfonic acid or phosphoric acid derivative structure and its application in a secondary lithium battery. The polymer in the solid electrolyte contains a sulfonic acid or phosphoric acid derivative structural unit, can be flame retarded, thereby reducing the risk of thermal runaway of the battery, and has a wide electrochemical window, and can be applied to a high voltage lithium battery. The invention also provides an application example of the above polymer electrolyte in a secondary lithium battery.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI

Switch magnetic resistance motor controller based on synchronous rectification technology

The invention discloses a switch magnetic resistance motor controller based on a synchronous rectification technology. The controller comprises a microprocessor, a first and gate, a first nand gate, a current sampling circuit, a sample amplification circuit, a magnetic resistance motor position sensor and a power transformer. In a motor operating stage, the microprocessor determines a currently switch-on phase by analyzing a signal from the switch magnetic resistance motor position sensor, and simultaneously determines the current state of the current according to the sample amplification signal of the sample amplification circuit. The microprocessor controls an upper and a lower follow current MOS (Metal oxide semiconductor) tube in the power transformer according to the state of the switch magnetic resistance motor position and the state of the current. The controller disclosed by the invention can utilize a MOS tube groove to provide a follow current channel in a switch magnetic resistance motor winding and follow current stage, and generates smaller switch-on loss than existing diode follow current technology, thus energy loss and power transformer temperature rise are reduced, the system is more reliable and safer, follow current tube low temperature effect is achieved, and the reliability and safety of the system are improved.
Owner:SOUTHEAST UNIV

Lithium battery positive electrode current collector, preparation method thereof, lithium battery and positive electrode thereof

The invention relates to the field of lithium batteries, in particular to a lithium battery positive electrode current collector, a preparation method thereof, a lithium battery and a positive electrode thereof. The positive electrode current collector comprises a polymer film, aluminum metal areas are arranged on the side faces of the two sides of the polymer film, aluminum metal layers are arranged on the aluminum metal areas, and the area of the aluminum metal layers is 40-70% of the area of the polymer film. The lithium battery provided by the invention adopts the positive electrode current collector, so that the energy density of the lithium metal battery is improved, the stripping and falling probability of the positive electrode active material is also reduced in the charging and discharging processes of the battery, the cycle life of the battery is further prolonged, in addition, the condition of micro short circuit of the lithium battery is further reduced, and the safety performance of the lithium battery is improved.
Owner:ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD

Anodic oxidation solution, battery shell, insulation protection method of battery shell and application of anodic oxidation solution

The invention belongs to the technical field of batteries and relates to an anodic oxidation solution, a battery shell, an insulation protection method of the battery shell and application of the anodic oxidation solution. The battery shell provided by the invention comprises a shell body and a protective layer arranged on the surface of the shell body, and the protective layer is made of a composite material formed by aluminum oxide and polyaniline. According to the battery shell provided by the invention, the insulating property and the corrosion resistance of the battery shell can be greatly improved.
Owner:SVOLT ENERGY TECHNOLOGY CO LTD

Semiconductor device

InactiveCN101661953AReduce bumpsInhibition of poor wettabilityTransistorSolid-state devicesMetal sheetHeight difference
A semiconductor device. In a discrete bipolar transistor with two layers of electrode structures, the emitter electrode in a first layer and the emitter region are connected via emitter contact holesof a first insulated film formed therebetween. The emitter electrode in the second layer and the emitter electrode in the first layer are connected via emitter through holes of a second insulated filmformed therebetween. Accordingly, the emitter contact holes and the emitter through holes are overlapped under the emitter electrode in the second layer so as to generate a height difference of a thickness of two insulated films. The height difference influences the surface of the emitter electrode in the second layer, thus producing bad adhesion owing to large bump when a metal sheet is bound onthe surface with a solder. Emitter contact holes formed under the emitter electrode in the first layer and emitter through holes formed thereon are arranged so as not to overlap each other, and, foreach emitter electrode, the multiple emitter contact holes and the multiple emitter through holes are provided so as to be separated from each other. Thereby, the top surface of an emitter electrode in a second layer is influenced by at most only a height difference of each emitter through hole formed in an insulated film having a larger thickness, and thus the flatness of the top surface of the emitter electrode in the second layer is improved. Accordingly, fixation failure of a metal sheet can be avoided.
Owner:SANYO ELECTRIC CO LTD +1

Aluminum-coated positive electrode material capable of inhibiting oxygen release and battery comprising aluminum-coated positive electrode material

The invention provides an aluminum-coated positive electrode material capable of inhibiting oxygen release and a battery comprising the aluminum-coated positive electrode material. The aluminum-coated positive electrode material comprises positive electrode active particles and an aluminum layer coated on the surfaces of the positive electrode active particles. According to the invention, the surface of the positive active particle is coated with the aluminum layer, and by utilizing the reducibility of the metal simple substance aluminum, when the battery is in thermal runaway, the positive active particle is decomposed to release oxygen, and the metal simple substance aluminum coated on the positive active particle can reduce oxygen to form a metal oxide, namely, aluminum oxide; the ignition of the combustible electrolyte under the condition that the released oxygen accumulates heat is avoided, and the risk of thermal runaway of the battery is effectively reduced. The metal simple substance aluminum has high electrical conductivity, the electrical conductivity of the positive electrode material can be improved, meanwhile, aluminum oxide is generated after the metal simple substance aluminum absorbs oxygen, the aluminum oxide is gradually lithiated in the charging and discharging process to form a fast ion conductor, the ionic conductivity of the positive electrode is improved, and the cycle life of the battery is prolonged.
Owner:SVOLT ENERGY TECHNOLOGY CO LTD

Unit module and battery pack

The invention relates to the field of batteries, and provides a unit module and a battery pack. Each unit module comprises at least one soft package battery cell and a shell assembly, an accommodating cavity for accommodating each soft package battery cell is formed in the shell assembly, and an exhaust hole for communicating the accommodating cavity to the outside is formed in one side, in the height direction of the soft package battery cell, of the shell assembly. Based on the structure, a unit module which is regularized, modularized, independent, better in strength and better in rigidity can be formed. No matter the position where thermal runaway happens to the soft package battery cell in the shell assembly is located at the tab, the edge sealing position or other positions of the soft package battery cell, heat and gas discharged by the soft package battery cell with thermal runaway are directionally discharged out of the unit module along the exhaust holes. Therefore, the battery pack can take thermal runaway protection measures based on directional exhaust path pre-design, the risk / speed of thermal runaway spreading to other unit modules can be reduced when a certain unit module is in thermal runaway, and the safety performance of the battery pack can be guaranteed and improved.
Owner:EVERGRANDE NEW ENERGY TECH SHENZHEN CO LTD

Battery pack integrated with vehicle body function and vehicle

The invention discloses a battery pack integrated with vehicle body functions and a vehicle. A vehicle body framework is provided with a tray structure; a containing cavity is formed between the floor and the tray structure; the battery module consists of a plurality of battery cells and is arranged in the accommodating cavity; the air duct is provided with an air inlet and a battery air outlet, the battery air outlet is formed in the containing cavity, at least part of the air duct body is arranged in the containing cavity, and the air inlet is connected with a whole vehicle air conditioning system; the battery pack is integrated with the vehicle body, the arrangement space of the battery pack is increased, the battery pack and the seat cabin share the warm air system, so that the heat management system and the vehicle body function are highly integrated, the internal space of the battery pack is optimized, and the cost is reduced; the arrangement of internal and external wiring harnesses of the battery pack is reduced; the battery management system selects an electricity taking object as a battery cell containing thermal runaway, so that the battery cell within the electricity taking range is rapidly discharged, and the risk of thermal runaway is reduced.
Owner:CHINA FIRST AUTOMOBILE
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