A battery system integrating heat exchange, fire protection and thermal safety

Abstract

The present invention discloses a battery system integrating heat exchange, fire protection and thermal safety, which includes an electric box integrated liquid cooling plate. A protective frame is fixed on one side plate surface of the electric box integrated liquid cooling plate to form a battery placement space. A module isolation plate is arranged inside the protective frame, and the module isolation plate divides the battery placement space into multiple isolation chambers. Battery modules are arranged in the isolation chambers; one end of the protective frame is a breathable plate; an explosion-proof foam is arranged between the breathable plate and the battery modules; a U-shaped fire protection pipe network is arranged on the module isolation plate, and fire nozzles corresponding to the battery modules are arranged on the U-shaped fire protection pipe network. The battery system integrating heat exchange, fire protection and thermal safety disclosed by the present invention can control the temperature of the battery system, and at the same time can integrate heat exchange, fire protection and thermal safety, so that the functions of each component are improved, the use and safety performance of the battery system can be improved, and there are fewer component designs, which can reduce the manufacturing time and cost of the overall system and improve the product quality reliability.

Description

Technical Field

[0001] The present invention relates to the technical fields of lithium batteries and new energy, and particularly to a battery system integrating heat exchange, fire protection and thermal safety. Background Art

[0002] Developing and using new energy vehicles, rail transit vehicles, ships and other means of transportation powered by lithium-ion battery systems, as well as new energy power energy storage systems with them as the main energy conversion components, has become a key breakthrough direction in industrial technology. Due to many advantages such as environmental protection and energy conservation, lithium-ion batteries have set off a new round of energy technology revolution and received extensive attention from countries around the world.

[0003] As the core of new energy products, the lithium-ion battery system has many system components and complex integration, and its safety is also the top priority of the reliability of new energy equipment. Its charging and discharging process is an electrochemical reaction process of lithium-ion materials. Due to its material characteristics, lithium-ion batteries will generate heat during operation. After long-term use, the internal temperature of the battery cells will exceed 60°C or even higher. If the temperature of the battery cells is too high, local thermal runaway of the battery cells will occur. Thermal runaway of the battery refers to an accumulative enhancement effect on the battery temperature during the use of the battery, which gradually damages the battery and causes phenomena such as fire and explosion, and thermal spread to other battery cells in the system. If effective measures such as heat insulation, cooling, fire extinguishing and re-ignition suppression are not taken, the battery system will experience serious thermal runaway. If directional smoke exhaust and heat exhaust are not carried out during the thermal runaway process, it will cause serious consequences such as battery combustion and explosion. When the temperature is below 0°C, the battery discharge capacity decreases significantly. Temperature affects the charge and discharge rate, power capacity, cycle life and safety of the battery. Meeting the requirements of the battery system for heat exchange, fire protection and safety in design, reducing the number of functional components in system integration, adopting an integrated design, and using multi-dimensional and multi-level safety protection in terms of battery safety to prevent major safety problems such as battery explosion are the main breakthrough directions for subsequent technologies. This patent proposes a design technology integrating heat exchange, fire protection and thermal safety to address the safety challenges of lithium battery systems and improve battery safety.

[0004] Currently, the heat exchange functions of mainstream battery systems are all achieved by components such as air-cooling channels or liquid-cooling plates. Most liquid-cooling plates are separated from the battery box, and designs for heat conduction and fixed installation are required. Liquid-cooling plates mostly adopt stamping or blow-brazing processes and are installed in the battery box. Their manufacturing process is complex, the manufacturing molds are costly, the materials of the liquid-cooling plates are thin, and large deformations will occur after long-term use, resulting in an increase in local temperature difference, corrosion of the heat exchange medium, and a relatively large hidden danger of liquid leakage. The fire protection system uses a heptafluoropropane medium combined with fire sprinklers to penetrate deep into the battery PACK, or aerosol fire extinguishing devices are built into the battery PACK. Heptafluoropropane is a clean gas chemical fire extinguishing agent that mainly uses chemical extinguishing with a physical extinguishing effect. It is colorless, odorless, low-toxic, non-conductive, and does not pollute the protected object, and will not damage property and precision facilities. However, it cannot effectively perform rapid physical cooling on the single battery cells with high temperature and heat generation, and cannot accurately spray and extinguish the fire in the area of the burning battery cells, resulting in a poor fire extinguishing effect. For batteries with fire protection failure or severe thermal runaway, no thermal safety design is adopted to conduct thermal insulation and delay the thermal runaway speed of the battery system from "single battery cell" to "whole", and no directional exhaust of smoke is carried out for the battery system with thermal runaway to prevent the occurrence of major safety problems such as deflagration and explosion. Currently, there are many components for heat exchange, fire protection, and system integration, and the process is complex. The lack of integrated and multi-dimensional linkage design in the system designs of thermal management, fire protection, thermal safety, etc. to ensure the safe use of batteries is also one of the main reasons for current battery safety accidents. Summary of the Invention

[0005] The present invention proposes a battery system integrating heat exchange, fire protection, and thermal safety, which solves the problem that when the existing battery systems are integrated, components such as the heat exchange system, fire protection system, thermal safety, and box structure are designed separately and are independent systems in terms of function and application, resulting in a large number of components and complex processes in production and manufacturing, and a single function in terms of safety guarantee, and unable to form a multi-dimensional and integrated safety guarantee mechanism for the heat-fire-thermal safety of the battery.

[0006] The technical means adopted by the present invention are as follows:

[0007] A battery system integrating heat exchange, fire protection, and thermal safety includes a battery module, a box upper cover, a U-shaped fire protection pipe network, a protective frame, an electric box integrated liquid-cooling plate, explosion-proof foam, a ventilation plate, and a module isolation plate;

[0008] One side plate surface of the electric box integrated liquid-cooling plate is fixed with the protective frame, and the protective frame and the electric box integrated liquid-cooling plate enclose a battery placement space for accommodating the battery module;

[0009] At least one module isolation plate is arranged in the protective frame, and the module isolation plate divides the battery placement space into a plurality of parallel isolation chambers, and each isolation chamber is internally provided with the battery module;

[0010] At one end along the direction in which the isolation cavity is arranged, the protective frame is a ventilation plate;

[0011] An explosion-proof foam is provided between the ventilation plate and the battery module in the isolation cavity;

[0012] The U-shaped fire protection pipe network is provided on the module isolation plate, and fire protection nozzles corresponding to the battery module are provided on the U-shaped fire protection pipe network;

[0013] The upper cover of the box body is buckled with the protective frame.

[0014] Furthermore, an explosion-proof valve is further included, and the explosion-proof valve is arranged on the upper cover of the box body and / or the protective frame.

[0015] Furthermore, a hollow cavity is arranged inside the module isolation plate, and fireproof and heat-insulating glue is filled in the hollow cavity.

[0016] Furthermore, the integrated liquid-cooling plate of the electrical box includes a liquid-cooling plate housing and stretching ribs arranged inside the liquid-cooling plate housing. The stretching ribs divide the inner cavity of the liquid-cooling plate housing into cooling channels, and a coolant inlet and a coolant outlet are provided on the liquid-cooling plate housing.

[0017] Furthermore, the U-shaped fire protection pipe network includes a fire protection working medium spraying pipe arranged on the module isolation plate and a connecting pipe for connecting a plurality of the fire protection working medium spraying pipes.

[0018] Furthermore, a heat-conducting pad is further included, and the heat-conducting pad is arranged between the integrated liquid-cooling plate of the electrical box and the battery module.

[0019] Compared with the prior art, the battery system based on integrated heat exchange, fire protection and thermal safety of the present invention has the following beneficial effects: Since an integrated liquid-cooling plate of the electrical box, a module isolation plate, a U-shaped fire protection pipe network and a protective frame are provided, and an explosion-proof foam and a ventilation plate are provided at one end of the protective frame, during the use of the battery module, a thermal management system composed of components such as the integrated liquid-cooling plate of the electrical box and the heat-conducting pad performs temperature control on the battery, can perform high-temperature cooling and low-temperature heating on the battery system, and can simultaneously integrate heat exchange, fire protection and thermal safety, so that the functions of each component are improved, the use and safety performance of the battery system can be improved, and with fewer component designs, the overall system manufacturing time and cost can be reduced, and the product quality reliability can be improved. Description of the Drawings

[0020] Figure 1 It is a structural diagram of the battery system based on integrated heat exchange, fire protection and thermal safety disclosed by the present invention;

[0021] Figure 2Structural diagram of the connection between the module isolation plate and the fire protection pipe network;

[0022] Figure 3 Internal structural diagram of the integrated liquid cooling plate of the electrical box;

[0023] Figure 4 Schematic diagram of the flow of the fire protection working medium of the battery system integrating heat exchange, fire protection and thermal safety disclosed by the present invention;

[0024] Figure 5 Thermal safety schematic diagram of the battery system integrating heat exchange, fire protection and thermal safety disclosed by the present invention, that is, the schematic diagram of the flue gas flow;

[0025] Figure 6 Schematic diagram of the flue gas passing through the breathable plate.

[0026] In the figure: 1. Battery module, 2. Upper cover of the box body, 3. U-shaped fire protection pipe network, 4. Protective frame, 5. Integrated liquid cooling plate of the electrical box, 6. Explosion-proof foam, 7. Breathable plate, 8. Module isolation plate, 9. Battery placement space, 10. Isolation cavity, 11. Fire protection nozzle, 12. Explosion-proof valve, 13. Shell of the liquid cooling plate, 14. Tensile rib, 15. Cooling flow channel, 16. Coolant inlet, 17. Coolant outlet, 18. Fire protection working medium spraying pipe, 19. Connecting pipe, 20. Thermal conductive pad, 21. Hollow cavity, 22. Installation hole, 23. Fireproof aerogel pad, 24. Fireproof and heat-insulating glue, 25. Fire protection working medium inlet, 26. Breathable hole. Detailed implementation mode

[0027] As Figure 1 shown, the battery system integrating heat exchange, fire protection and thermal safety disclosed by the present invention includes a battery module 1, an upper cover 2 of the box body, a U-shaped fire protection pipe network 3, a protective frame 4, an integrated liquid cooling plate 5 of the electrical box, an explosion-proof foam 6, a breathable plate 7 and a module isolation plate 8;

[0028] One side plate surface of the integrated liquid cooling plate 5 of the electrical box is fixed with the protective frame 4, and the protective frame 4 and the integrated liquid cooling plate 5 enclose a battery placement space 9 for accommodating the battery module 1;

[0029] At least one module isolation plate 8 is arranged in the protective frame 4, and the module isolation plate 8 divides the battery placement space 9 into a plurality of parallel isolation cavities 10, and each isolation cavity 10 is internally provided with the battery module 1;

[0030] At one end along the arrangement direction of the isolation cavity 10, the protective frame 4 is a breathable plate 7;

[0031] An explosion-proof foam 6 is arranged between the breathable plate 7 and the battery module 1 in the isolation cavity 10;

[0032] The module isolation plate 8 is provided with the U-shaped fire-fighting pipe network 3, and the U-shaped fire-fighting pipe network 3 is provided with a fire-fighting nozzle 11 corresponding to the battery module 1;

[0033] The box upper cover 2 is buckled with the protective frame 4 .

[0034] Specifically, Figure 3 As shown, the electric box integrated liquid cooling plate is a metal plate with a built-in heat exchange circuit, which can exchange heat for the battery pack. In the present application, the electric box integrated liquid cooling plate 5 is formed by extruding an aluminum profile, and the electric box integrated liquid cooling plate 5 includes a liquid cooling plate shell 13 and a stretching rib 14 arranged in the liquid cooling plate shell 13. The stretching rib 14 divides the inner cavity of the liquid cooling plate shell 13 into a cooling channel 15. The liquid cooling plate shell 13 is provided with a coolant inlet 16 and a coolant outlet 17. The electric box integrated liquid cooling plate 5 is made of thicker material, so the battery module 1 can be fixedly connected to the electric box integrated liquid cooling plate by bolts. The electric box integrated liquid cooling plate 5 serves as both a system load-bearing unit and an internal thermal management unit. A protective edge is welded on one side of the plate surface of the electric box integrated liquid cooling plate 5. The frame 4, the protective frame 4 and the electric box integrated liquid cooling plate 5 enclose a battery placement space 9 for accommodating the battery module 1. A module isolation plate 8 is also welded on the electric box integrated liquid cooling plate. The module isolation plate 8 divides the battery placement space 9 into a plurality of parallel isolation chambers 10. Each isolation chamber 10 contains the battery module 1. The battery module adopts the mainstream square battery cell in the market. The battery cell has an exhaust valve in the middle. Its main function is to discharge the combustible smoke and high-pressure gas inside the thermal runaway battery cell from the battery cell body in time to reduce the risk of explosion. A hollow cavity 21 is provided in the module isolation plate 8. The hollow cavity 21 is filled with fireproof heat-insulating glue 24. A fireproof aerogel pad 23 is provided between the module isolation plate 8 and the battery module. Preferably, a thermal pad 20 is provided between the electric box integrated liquid cooling plate 5 and the battery module 1. At one end of the direction in which the isolation chamber 10 is arranged, the protective frame 4 is a breathable plate 7. In this embodiment, an aluminum breathable plate is welded on the back of the battery system; the explosion-proof foam 6 is provided between the breathable plate 7 and the battery module 1 in the isolation chamber 10; the U-shaped fire protection pipe network 3 is provided on the module isolation plate 8, such as Figure 2As shown, the U-shaped fire protection pipe network 3 includes a fire protection working medium spraying pipe 18 arranged on the module isolation plate 8 and a connecting pipe 19 for connecting a plurality of the fire protection working medium spraying pipes 18. A fire protection spray nozzle 11 corresponding to the battery module 1 is provided on the U-shaped fire protection pipe network 3. In this embodiment, the fire protection working medium spraying pipe and the module heat insulation plate 8 are of an integrated structure, that is, one end of the hollow cavity in the upper part of the module heat insulation plate is interconnected through the connecting pipe 19, and the other end is sealed with a baffle or other structures; the upper cover 2 of the box body is buckled with the protection frame 4 to encapsulate the battery module in the battery box body of the closed space surrounded by the electric box integrated liquid cooling plate, the protection frame and the upper cover of the box body. The battery box body is an outer shell for wrapping the battery module and can be externally fixed and connected to protect the internal battery, etc. In this embodiment, the upper cover of the box body is fixedly connected to the protection frame and the top of the U-shaped fire protection pipe network by screws.

[0035] Furthermore, the battery system based on heat exchange, fire protection and thermal safety disclosed by the present invention further includes an explosion-proof valve 12, and the explosion-proof valve 12 is arranged on the upper cover 2 of the box body and / or the protection frame 4. In this embodiment, the explosion-proof valve is arranged in the upper cover of the box body.

[0036] For the battery system based on heat exchange, fire protection and thermal safety disclosed by the present invention, since there are an electric box integrated liquid cooling plate, a module isolation plate, a U-shaped fire protection pipe network and a protection frame, and one end of the protection frame is provided with an explosion-proof foam and a ventilation plate, the battery module generates heat during use. In the battery system disclosed in this application, the electric box integrated liquid cooling plate is equipped. The electric box integrated liquid cooling plate can introduce a heat exchange working medium, and a thermal management system composed of components such as the electric box integrated liquid cooling plate and a heat conduction pad performs temperature control on the battery, and can perform high-temperature cooling and low-temperature heating on the battery system. Since the electric box integrated liquid cooling plate is formed by extrusion of flat aluminum profiles, the cold plate has internal flow channels and is externally equipped with a liquid inlet, a liquid outlet and pipelines, and is made by friction stir welding process and machining. It can not only exchange heat for the module but also serve as the bottom load-bearing unit of the battery system. The cross-section of the internal flow channel can strengthen the bottom strength, reduce the number of components while improving the heat exchange capacity of the components, and simplify the system integration process. Under high-temperature working conditions, the high-temperature battery transfers heat to the electric box integrated liquid cooling plate through the bottom heat conduction pad, and the external refrigerator is turned on. The refrigerator passes the low-temperature refrigerant into the electric box integrated liquid cooling plate through the external pipeline by a high-pressure pump, and the refrigerant circulates in the pump group to take away the heat, so that the battery is cooled. The heat transfer path is: battery module - heat conduction pad - electric box integrated liquid cooling plate - refrigerant.

[0037] In the case of local overheating of battery cells due to manufacturing or assembly process deviations of battery cells and battery abuse, etc., if local temperature control is not carried out, thermal runaway will eventually be induced. When the temperature of the battery cell is too high, and the battery cell is the smallest power unit of the battery system and close to the temperature upper limit, the fire detection will detect abnormal temperature through the BMS, and turn on the intelligent fire protection system to cool the battery cell. A small amount of fire extinguishing agent perfluorohexanone enters the U-shaped fire protection pipe network through the fire extinguishing agent inlet 25 of the U-shaped fire protection pipe network. The fire nozzles equipped on both sides of the U-shaped fire protection pipe network can spray the fire extinguishing agent into the battery module (battery PACK). As Figure 4 The arrow shown in indicates the flow direction of the fire extinguishing agent. The fire nozzles are close to the battery cells and can be directly attached to the outer surfaces of the battery cells on both sides to absorb the heat of the battery cells and cool the battery cells. When the temperature of the battery cell exceeds the upper limit and the smoke detector is triggered to detect the thermal runaway gas, a large amount of perfluorohexanone fire extinguishing agent is sprayed out from both sides of the U-shaped fire protection pipe network through the fire extinguishing agent inlet 25, precisely extinguishing the thermal runaway battery cells and submerging the battery PACK, suppressing the fire in the initial stage of occurrence and development, and suppressing the secondary reignition of the thermal runaway of the battery system. The battery PACK is a battery pack unit formed by fixing the battery cells through a frame and other accessory mechanisms.

[0038] The battery system disclosed in this application conducts thermal safety design for the thermal runaway of battery cells. Thermal safety is carried out from three dimensions: 1 Thermal inhibition; 2 Thermal barrier; 3 Thermal conduction.

[0039] Specifically, thermal inhibition: The integrated liquid cooling plate of the electrical box and the cooling of the fire extinguishing agent are used as effective means of thermal inhibition to suppress the temperature of the battery cells and prevent thermal runaway caused by excessive temperature.

[0040] Thermal isolation: As Figure 5 shown, the module isolation plate 8 and the protective frame 4 divide the battery system into several relatively airtight spaces. The inside of the module isolation plate 8 is designed with a hollow structure and filled with fireproof and heat-insulating glue, which can effectively isolate the temperature. Fireproof aerogel layers are pasted on both sides of the module isolation plate 8, the inner side of the protective frame 4 and the lower side of the box cover 2 to form a fireproof isolation space. Taking the module as the isolation unit, the battery cells that initially undergo thermal runaway can be controlled within the fireproof isolation space. The fireproof aerogel can effectively prevent the heat transfer of the burning battery cells and modules to the adjacent module spaces on the side, and the enclosed space can prevent the thermal runaway smoke and dust from leading to other module spaces, avoiding large-scale thermal runaway of the battery system.

[0041] Thermal conduction: When thermal runaway occurs in the battery system, the fire extinguishing agent perfluorohexanone will submerge the entire battery system for fire extinguishing. The air pressure in the battery pack increases. When the pressure is too high, the explosion-proof valves in different isolation spaces will gradually release the high-pressure gas to prevent explosion caused by excessive pressure. As Figure 5 and Figure 6As shown, when the thermal runaway of the battery is not relieved after the fire protection system executes an action, the battery temperature continues to increase, and the combustible high-temperature smoke and dust continue to increase. When the temperature of the high-temperature flue gas exceeds the limit temperature, the explosion-proof foam will rupture, and the flue gas will be quickly discharged outside the battery system through the ventilation holes on the ventilation plate, the pressure will be quickly released, and the system temperature will drop rapidly in a short time, preventing the thermal runaway of local battery cells from inducing overall thermal runaway. This design can effectively inhibit the speed of thermal spread and delay the thermal runaway speed of the battery system from "a small range of battery cells" to "a large range as a whole". It can perform side-directional flue gas discharge for the battery system with thermal runaway to prevent major safety problems such as deflagration and explosion. Figure 5 In the figure, label A indicates the position of the battery cell with thermal runaway, and label B indicates the direction of flue gas discharge. Perfluoromethylcyclohexane is an important alternative to Halon fire extinguishing agents. It is a compound of fluorinated ketones. It is a clear, colorless, and odorless liquid, supercharged with nitrogen, and stored in a high-pressure gas cylinder as part of a fire extinguishing system.

[0042] The patented solution applied in this application is applicable to the battery system fields of new energy electric vehicles, new energy electric locomotives, and new energy power energy storage prefabricated cabins. When integrating existing mainstream battery systems, components such as the heat exchange system, fire protection system, thermal safety, and box structure are designed separately and are independent systems in terms of function and application. There are many components and complex processes in production and manufacturing. In terms of safety guarantee, the function is single, and a multi-dimensional and integrated safety guarantee mechanism from battery heat - fire protection - thermal safety cannot be formed.

[0043] The battery system based on integrated heat exchange, fire protection, and thermal safety disclosed in this application adopts an integrated design, integrating the structures of heat exchange, fire protection, and thermal safety. It has the following prominent features:

[0044] 1. The functions of the heat exchange, fire protection, battery box, and thermal safety sub-components are improved, which can improve the usage and safety performance of the battery system.

[0045] 2. With fewer component designs, it can reduce the manufacturing time and cost of the overall system and improve the product quality reliability.

[0046] 3. The fire protection working medium can directly contact the surface of the battery cell for cooling and fire extinguishing, which can improve the fire protection effect.

[0047] 4. Ensure the safety of the battery from the functional concepts of controlling the battery temperature - cooling and fire extinguishing - heat conduction. Adopt a multi-dimensional, multi-strategy, and layer-by-layer linkage strategy from heat exchange - intelligent fire protection - thermal safety design to inhibit the explosion accident caused by the thermal runaway of the battery.

[0048] 5. The module isolation board between battery modules can effectively isolate temperature and heat. The system's directional hot flue gas discharge function can effectively reduce the concentration of combustible gases in the battery system, timely discharge the high-temperature energy outside the system, reduce the explosion risk of the battery system, and improve the battery safety.

[0049] Combined with the locomotive power battery system, the energy storage power battery system adopts a battery system with integrated heat exchange, fire protection and thermal safety design. Under the working state of the battery, the temperature difference between battery cells can be controlled within 3°C, and the highest temperature of the battery cells is controlled below 35°C, greatly improving the battery's performance and safety. The intelligent fire protection system can extinguish fires over the entire surface of the battery, quickly extinguish open flames and suppress re-ignition. Through thermal safety experiments, it can be known that the thermal runaway of battery cells is a chain reaction that requires a heat conduction path to quickly exhaust the high-temperature flue gas. The speed of thermal runaway will be reduced, and the probability that non-fired battery cells do not undergo thermal runaway will increase significantly, ensuring safety. The number of system-integrated components is reduced, and the overall assembly efficiency is improved.

[0050] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A battery system integrating heat exchange, fire protection and thermal safety, characterized in that: it includes a battery module, a box body upper cover, a U-shaped fire protection pipe network, a protective frame, an electric box integrated liquid cooling plate, explosion-proof foam, a breather plate and a module partition plate; One side plate surface of the electric box integrated liquid cooling plate is fixed with the protective frame, and the protective frame and the electric box integrated liquid cooling plate enclose a battery placement space for accommodating the battery module; At least one module partition plate is arranged in the protective frame, and the module partition plate divides the battery placement space into a plurality of parallel isolation cavities, and each isolation cavity is internally provided with the battery module; At one end along the arrangement direction of the isolation cavity, the protective frame is a breather plate; The explosion-proof foam is arranged between the breather plate and the battery module in the isolation cavity; The module partition plate is provided with the U-shaped fire protection pipe network, and the U-shaped fire protection pipe network is provided with fire spray nozzles corresponding to the battery modules; The box body upper cover is buckled with the protective frame; It further includes a heat-conducting pad, and the heat-conducting pad is arranged between the electric box integrated liquid cooling plate and the battery module.

2. The battery system integrating heat exchange, fire protection and thermal safety according to claim 1, characterized in that: It further includes an explosion-proof valve, and the explosion-proof valve is arranged on the box body upper cover and / or the protective frame.

3. The battery system integrating heat exchange, fire protection and thermal safety according to claim 1 or 2, characterized in that: The module partition plate is internally provided with a hollow cavity, and the hollow cavity is filled with fireproof and heat-insulating glue.

4. The battery system integrating heat exchange, fire protection and thermal safety according to claim 3, characterized in that: The electric box integrated liquid cooling plate includes a liquid cooling plate shell body and stretching ribs arranged in the liquid cooling plate shell body, and the stretching ribs divide the inner cavity of the liquid cooling plate shell body into cooling channels, and the liquid cooling plate shell body is provided with a coolant inlet and a coolant outlet.

5. The battery system integrating heat exchange, fire protection and thermal safety according to claim 1, characterized in that: The U-shaped fire protection pipe network includes a fire protection working medium spraying pipe arranged on the module partition plate and a connecting pipe for connecting a plurality of the fire protection working medium spraying pipes.

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