47results about How to "Inhibit thermal runaway" patented technology

The invention discloses an electric automobile battery module thermorunaway safety fire extinguishing system. The electric automobile battery module thermorunaway safety fire extinguishing system comprises battery cells (9), a housing (8), a liquid storage tank (4), fire protection valves (2), temperature sensors (5), pressure sensors (6), and a controller (1); a plurality of the battery cells (9) are connected in parallel so as to form a battery unit, and a plurality of the battery units are connected in parallel so as to form a battery module; fire-proof materials (7) are arranged in the housing (8) at equal intervals; the liquid storage tank (4) is used for cooling the battery module; the fire protection valves (2) are used for controlling flowing of liquid; the temperature sensors (5) and the pressure sensors (6) are used for monitoring the temperature and gas signals of the battery module, and sending the temperature and gas signals to the controller; and the controller (1) is used for controlling opening and closing of the fire protection valves (2) based on the temperature and gas signals so as to cool the battery module and inhibit battery cell thermorunaway. The invention also discloses a fire extinguishing method using the electric automobile battery module thermorunaway safety fire extinguishing system. The electric automobile battery module thermorunaway safety fire extinguishing system and the fire extinguishing method are capable of inhibiting thermorunaway of the battery module effectively, and are high in automation degree.

The invention provides an immersed liquid cooling battery pack. The battery pack includes a case cover, a battery box forming the sealed space with the box cover, a steam guide plate which is a wedge-shaped plate with the middle protruding upwards, a partition plate which is mounted in the middle of the battery box and divides the battery box into an upper box and a lower box, a steam hole which is positioned at the middle of the steam guide plate and is communicated with an upper box and a lower box, two liquid leakage grooves which are formed on two sides of the steam guide plate correspondingly and communicate with the upper box and the lower box, a battery mounted and fixed in the lower box, the cooling liquid which is injected into the lower box to soak the battery, a power fan mounted and fixed on the steam hole on the steam guide plate, a stirring fan which is fixedly arranged at the bottom of the lower box and is soaked by the cooling liquid, a cooling fan mounted and fixed onthe box cover, and a rotating shaft is a rotating shaft which is fixedly mounted by the power fan, the stirring fan and the cooling fan together, wherein the the cooling liquid is low-boiling-point insulating liquid with the boiling point of 30-70 DEG C.

The lithium ion secondary battery according to one embodiment of the present invention comprises, in an electrode, an electrode active material, a conductive auxiliary, and a binding material. The binding material is formed from: a binding component that binds the conductive auxiliary and forms conduction paths between the electrode active material; and a melting point depressant that depresses the melting point of the binding component. The melting point depressant is a PTC-functionality-imparting component that reduces the melting start temperature of the binding material and thereby gives the lithium ion secondary battery PTC functionality. When a conductive foreign substance has generated short circuit heat inside the lithium ion secondary battery, the binding material around the foreign substance is melted, and the conduction paths are cut off.

The invention relates to a self-destruction structure, an electrolyte, an electrode, a diaphragm and a battery. The self-destruction structure is used for being accommodated in a battery. The self-destruction structure includes a first shell and a chemical inhibitor. A first space is defined by the first shell. The chemical inhibitor is accommodated in the first space. The chemical inhibitor is used for inhibiting redox reaction during thermal runaway of the battery, and the gasification temperature of the chemical inhibitor is lower than the triggering temperature of thermal runaway of the battery. When the battery is overcharged, overheated and short-circuited, the redox reaction in the battery is accelerated, and a large amount of heat is generated. And the overall temperature of the self-destruction structure rises. The temperature of the chemical inhibitor in the self-destruction structure rises, and the gasification volume expands. The chemical inhibitor breaks through the firsthousing and diffuses to the battery electrolyte. And the chemical inhibitor is used for blocking the redox reaction during thermal runaway of the battery, so that the thermal runaway of the battery isrestrained, and the safety of the battery is improved. The self-destruction structure has important value for the safety design of the lithium ion battery with high specific energy.

The invention discloses a perfluorohexanone fire extinguishing method suitable for a lithium iron phosphate energy storage battery prefabricated cabin, which takes a battery cluster as a local application protection unit, takes the whole energy storage battery prefabricated cabin as a total flooding fire extinguishing object, and adopts a perfluorohexanone fire extinguishing mode combining local application and total flooding to extinguish open fire in a firing lithium iron phosphate battery. And the thermal runaway is inhibited. The system can effectively extinguish a fire in the energy storage battery cabin and inhibit thermal runaway development, does not cause harm and damage to a protected object, and does not cause secondary disasters; the energy storage battery cabin is protected in a one-control-one mode, the reliability is high, the manufacturing cost is low, the anti-freezing performance is good, and the application range is wide. Meanwhile, the defects in the prior art can be overcome, the fire protection problem of the lithium iron phosphate energy storage battery prefabricated cabin is solved, and large-scale application of the lithium iron phosphate energy storage battery prefabricated cabin can be promoted.

A polyolefin microporous membrane has a piercing elongation of 2.30 mm or lower and the temperature of the stress variation point is 80.0 DEG C or higher and the stress peak value is 1.8 g or lower inthermomechanical analysis (TMA) of the width direction of the polyolefin microporous membrane.

The invention relates to a solid electrolyte interface membrane (SEI-membrane)-coated negative electrode material composite material, a preparation method and a lithium ion battery adopting the composite material. The solid electrolyte interface membrane is a compact and uniform A1<2>O<3> ceramic membrane. The compact and uniformly-coated SEI membrane is fabricated on surface of the negative electrode material by a solid phase membrane formation method, a liquid phase membrane formation method or a chemical membrane formation method. The negative electrode material coated with the SEI membranehas relatively high structural stability and thermal stability, so that the lithium ion battery by taking the material as the negative electrode shows excellent cycle stability. The pass rate of no ignition and no explosion in an assembled NCM523 ternary flexibly-packaged lithium ion battery acupuncture experiment can reach 100%, so that the thermal runaway of the lithium ion batteries is suppressed effectively and the safety of the lithium ion batteries of short-circuit caused by extreme cases of puncturing and external force and the like can be improved. In addition, the preparation methodof the invention is simple, environmentally-friendly and low in cost, and suitable for large scale production.

The invention provides a nonaqueous secondary battery and a nonaqueous secondary battery pack that are extremely safe, being unlikely to emit smoke or explode even when a nail penetrates the battery in a charged state. In a flat nonaqueous secondary battery (10), an electrode assembly formed by stacking or winding a positive electrode and a negative electrode with a separator interposed therebetween is sealed in a laminated outer body (11) together with a nonaqueous electrolyte, and a positive electrode tab (12) and a negative electrode tab (13) are led out from the laminated outer body (11). The separator has a rupture elongation of 50% or more in at least the TD direction or the MD direction. A metal plate (14) connected to the positive electrode tab (12) is placed on an outer principal surface (15) of the laminated outer body (11).

The invention provides a thermal safety structure of a battery pack. The thermal safety structure comprises a battery box body, a thermal safety pipeline and a pressure relief structure, wherein the thermal safety pipeline is arranged on the battery box body; the thermal safety pipeline comprises a cooling liquid inlet and at least two jet orifices, the cooling liquid inlet is communicated with anexternal cooling system, the jet orifices are located in the battery box body and located on the lower portion of the battery box body, and a first valve located between the cooling liquid inlet andthe jet orifices is arranged on the thermal safety pipeline; the pressure relief structure is arranged on the battery box body. The invention further provides a battery pack thermal management systemwhich comprises a battery manager and the battery pack thermal safety structure. A vehicle is also provided. The low-temperature and low-pressure liquid cooling liquid sprayed out of the cooling liquid is in contact with the high-temperature single battery and then is quickly evaporated into a gas state, the gas cooling liquid can fully exchange heat with the single battery in the gradual rising process, and the temperature of the single battery can be quickly reduced along with continuous spraying and vaporization heat absorption of the cooling liquid; and thermal runaway of the single battery is effectively inhibited.

A lithium storage element contains a positive electrode that contains a lithium compound other than an active material, a negative electrode, a separator, and a non-aqueous electrolytic solution containing lithium ions, for which an active material is applied on both surfaces of a nonporous positive electrode collector, and a negative electrode active material capable of storing and releasing lithium ions is applied on both surfaces of a nonporous negative electrode collector. The relationships 0.85<=Cx1/Cy1<=1.15, 0.85<=Ax1/Ay1<=1.15, 0.80<=(Ax1+Cx1)/(Ay1+Cy1)<=1.20, 0.1<=Cx2 (g/m2)<=18, 0.1<=Cy2 (g/m2)<=18, 0.60<=Cy2/Cx2<=1.70, and 0.60<=Cx2/Cy2<=1.70 are satisfied, where Cx1 is the basis weight of the positive electrode active material layer Cx surface, Cy1 is the basis weight of the other positive electrode active material layer Cy surface, Ay1 is the basis weight of the negative electrode active material layer Ay surface facing opposite the Cy surface, Ax1 is the basis weight of the other negative electrode active material layer Ax surface, Cx2 is the lithium compound amount per area of the Cx surface, and Cy2 is the lithium compound amount per area of the Cy surface.

The invention provides an air-cooling lithium battery pack thermal management system and method with a high protection level. The system comprises a battery pack, a battery pack casing and an externalair-cooling module. A micro heat pipe array is attached to the surface of a battery or a battery module, and a protruding portion of the micro heat pipe array is attached to the battery pack shell. The external air-cooling module is in close contact with the outer surface of the battery pack outer casing, the external air-cooling module has an air-cooling fin inside and a fan at a side. Accordingto the invention, the micro heat pipe array with high heat transfer and an air cooling mode are effectively combined, the heat inside the battery can be effectively transmitted to the outside, the temperature is prevented from being too high, the uniform temperature of the battery is ensured, the heat dissipation efficiency is high. The control system can automatically start the fan, the externalair-cooling fin automatically dissipate heat to achieve un-cooling energy-saving heat dissipation, the automatic heat dissipation is carried out when the battery is heated during the parking of an electric vehicle, and major safety risks such as thermal runaway are greatly suppressed.

The invention relates to a sandwich electrode and a battery. The sandwich electrode includes an electrode shell and a chemical inhibitor. A first space is defined by the electrode shell. The chemicalinhibitor is accommodated in the first space. The gasification temperature of the chemical inhibitor is lower than the triggering temperature of thermal runaway of the battery. Before the battery is subjected to thermal runaway, the chemical inhibitor is gasified and expanded and breaks through the electrode shell. The chemical inhibitor diffuses to the battery electrolyte. The chemical inhibitoris used for inhibiting oxidation-reduction reaction during thermal runaway of the battery, so that the rate of heat generated in the battery is reduced, and heat accumulation is avoided. And furthermore, the sandwich electrode improves the safety of the battery.

The invention discloses a water cooling system of a thermal power plant energy storage system, and a method. According to the invention, cold water in an evaporator and hot water in a thermal control device are subjected to heat exchange through a heat exchanger, so that thermal runaway of an energy storage system can be effectively restrained, and the system safety is greatly improved; a steam pipeline can effectively utilize low-grade steam of a thermal power plant, so that the energy consumption is low, and the heat dissipation efficiency is high; through liquid cooling, heat dissipation is uniform, the temperature difference of a battery core can be reduced, and the service life of the battery core is prolonged; and the stable work of the energy storage system in an environment of -40 DEG C to 60 DEG C can be met.

The invention relates to a trimethylsilyl-containing propynyl phosphate compound and a preparation method and application thereof, the structural general formula of the trimethylsilyl-containing propynyl phosphate compound is shown in the specification, and R1 and R2 are selected from one of Si atom-containing compounds, alkane groups, aryl groups or heteroaryl groups.

The invention discloses a microwave focusing method ceramic welding device and method, and relates to the technical field of microwave ceramic welding. The device comprises a single-mode resonant cavity, a cover plate and an adjustable piston structure, one side part of the single-mode resonant cavity is provided with a microwave power input port, and the side surface opposite to the direction of the microwave power input port is a concave-surface-shaped metal reflecting surface capable of reflecting microwaves and focusing the microwaves on one point; pressurizing mechanisms capable of pressurizing ceramic to be subjected to microwave welding in the single-mode resonant cavity are symmetrically mounted on the other two opposite side parts of the single-mode resonant cavity, and a vacuumizing opening is formed in the side part of the single-mode resonant cavity. The device is simple in structure, easy to control, relatively uniform in electric field and temperature distribution and stable in operation, can improve the problem that stress is generated due to non-uniform microwave field distribution, adopts the focusing reflecting surface with the ellipsoid curved surface to reflect and focus microwave beams, overcomes the defects that a traditional non-focusing device is high in microwave source power requirement and high in manufacturing cost, and improves the device reliability. The welding size of materials is improved, and the types of welding materials are increased.