Liquid-cooled battery pack

Abstract

The present application relates to battery pack heat management technical field, specifically relates to a kind of liquid-cooled battery pack.The present application provides a kind of liquid-cooled battery pack, including liquid-cooled plate cabin body, battery pack is arranged in liquid-cooled plate cabin body, liquid-cooled plate cabin body is by liquid-cooled plate cabin body upper plate, liquid-cooled plate cabin body rear plate, liquid-cooled plate cabin body front plate and liquid-cooled plate cabin body lower plate welding molding, liquid-cooled plate cabin body inner middle position is provided with liquid-cooled plate, liquid-cooled plate is by pipeline, rear sealing plate, front flow channel and water nozzle sealing plate welding molding, pipeline is air pipe type section bar, liquid-cooled plate cabin body left and right sides are all fixed with side sealing plate, liquid-cooled plate cabin body front side is fixed with front sealing plate.The present application has liquid-cooled plate and uses air pipe type section bar to set up middle narrow flow channel, reduces flow channel area, can simultaneously cool two sides battery, improves cooling efficiency and cooling more evenly, liquid-cooled plate cabin uses integrated scheme, the load-bearing of structure will be higher, and the advantages that load deformation amount will be smaller.

Description

Technical Field

[0001] This invention relates to the field of battery pack thermal management technology, and more specifically to a liquid-cooled battery pack. Background Technology

[0002] With the rapid development and continuous updates of the energy storage market, liquid cooling for single-sided battery cooling has been widely used in the energy storage industry.

[0003] Existing liquid cooling solutions for battery packs mostly use independent water-cooled plates laid flat at the bottom of the battery. The water-cooled plates are assembled separately from the casing, resulting in a loose overall structure, poor casing load-bearing capacity, and large deformation under load. Conventional water-cooling channels have a wide cross-section, low coolant flow rate, and poor heat exchange efficiency on both sides. The assembly process of the separate water-cooled plates and casing is complicated, and the casing forming only uses a single sheet metal process, resulting in poor adjustability of structural strength.

[0004] This invention proposes a liquid-cooled battery pack. By adopting an integrated liquid cooling plate compartment, the structural load-bearing capacity is improved and the deformation under load is reduced. By using a duct-type profile for the liquid cooling plate, the flow channel area is reduced, the coolant flow rate and the heat exchange efficiency on both sides are increased, and the battery modules on both sides of the liquid cooling plate are cooled at the same time. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a liquid-cooled battery pack to solve the technical problems mentioned in the background art, which are that existing liquid cooling solutions for battery packs mostly use independent water-cooling plates laid flat at the bottom of the battery, with the water-cooling plates and the housing assembled separately, resulting in a loose overall structure, poor housing load-bearing capacity, large deformation under load, large cross-section of conventional water-cooling channels, low coolant flow rate, poor heat exchange efficiency on both sides, and multiple assembly steps for the separate water-cooling plates and the housing, with the housing forming only using a single sheet metal process, resulting in poor adjustability of structural strength.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a liquid-cooled battery pack, including a liquid-cooled plate compartment, in which the battery pack is disposed. The liquid-cooled plate compartment is formed by welding together an upper plate, a rear plate, a front plate, and a lower plate. A liquid-cooled plate is disposed in the middle of the liquid-cooled plate compartment. The liquid-cooled plate is formed by welding together a pipe, a rear sealing plate, a front flow channel, and a water nozzle sealing plate. The pipe is a duct-type profile. Side sealing plates are fixed on both the left and right sides of the liquid-cooled plate compartment, and a front sealing plate is fixed on the front side of the liquid-cooled plate compartment.

[0007] In one possible implementation, two liquid cooling plate nozzles are provided on the front plate of the liquid cooling plate compartment. The front plate of the liquid cooling plate compartment has through holes, and the liquid cooling plate nozzles are inserted into the interface of the front flow channel through the through holes and welded.

[0008] In one possible implementation, a rear sealing plate is welded to the rear end of the pipe, and two water nozzle sealing plates are welded to the front end of the pipe, with a front flow channel welded to the front end of the two water nozzle sealing plates.

[0009] In one possible implementation, a liquid-cooled plate rear plate is welded to the rear end of the upper plate of the liquid-cooled plate compartment, a liquid-cooled plate front plate is welded to the front end of the upper plate of the liquid-cooled plate compartment, a liquid-cooled plate lower plate is welded to the lower end of the rear plate of the liquid-cooled plate compartment, and the lower end of the front plate of the liquid-cooled plate compartment is welded to the lower plate of the liquid-cooled plate compartment.

[0010] In one possible implementation, the upper plate, lower plate, and rear plate of the liquid-cooled plate compartment are all provided with grooves. The liquid-cooled plate is embedded in the grooves of the upper plate, lower plate, and rear plate and is welded and fixed respectively. The upper plate and lower plate of the liquid-cooled plate compartment are both provided with insertion slots. The inner side plates of the liquid-cooled plate compartment are inserted between the insertion slots of the upper plate and lower plate and welded and fixed.

[0011] In one possible implementation, the battery pack includes multiple batteries placed inside a liquid-cooled plate chamber and located on the left and right sides of the liquid-cooled plate. A front and rear spacer insulating plate is fixed between each pair of adjacent front and rear batteries, and a middle spacer insulating plate is fixed between each pair of adjacent vertically spaced batteries. Insulating thermally conductive pads are fixed on both sides of the liquid-cooled plate. The middle spacer insulating plate and the front and rear spacer insulating plates are fixedly connected to the insulating thermally conductive pads. A front end insulating plate is fixed to the rear side of the two side panels inside the liquid-cooled plate chamber, and a rear end insulating plate is fixed to the front side of the rear panel of the liquid-cooled plate chamber. Upper and lower insulating plates are fixed to the inner sides of the two side sealing plates.

[0012] In one possible implementation, the front end of the liquid-cooled plate compartment is fixed with a negative power connector, a positive power connector, a gas fire nozzle, a slave control fixing plate, a slave control communication connector, a fire communication connector, a fire detector, and a slave control plate.

[0013] In one possible implementation, fuses and insulators are fixed on the two side plates inside the liquid-cooled plate housing. An output aluminum busbar is fixed at the negative output position on the upper left side of the battery pack. The output aluminum busbar is fixedly connected to the negative power connector. An output aluminum busbar is fixed at the front end of the two side plates inside the liquid-cooled plate housing. The output aluminum busbar is fixedly connected to the positive power connector and the fuse. An output aluminum busbar is fixed at the positive output position on the upper right side of the battery pack. The output aluminum busbar is fixedly connected to the fuse.

[0014] In one possible implementation, the upper end of the battery is fixed with a battery insulating strip, the battery is fixed with a series aluminum busbar one and a series aluminum busbar two by external stud fasteners, and the lower end of the battery pack is fixed with a series aluminum busbar three at the negative terminal output position.

[0015] In one possible implementation, the side sealing plate and the front sealing plate are respectively attached with side sealing plate pressure strips and front sealing plate pressure strips, and an explosion-proof valve is fixed to the front end of the front sealing plate.

[0016] The beneficial effects of this invention are as follows: Compared with the prior art, this invention achieves the simultaneous function of the liquid cooling plate as a heat exchange component and internal reinforcing rib of the chamber by directly embedding the liquid cooling plate into the grooves of each plate of the chamber through welding. This significantly improves the overall load-bearing capacity and reduces the load deformation. By using duct profiles for the pipeline, a narrow flow channel in the middle of the cavity is achieved to increase the medium flow rate. The outer walls of the profiles are directly attached to the battery, allowing for simultaneous cooling on both sides with a smaller temperature difference and improved heat dissipation efficiency. By first integrally welding the liquid cooling plate and then welding it to the chamber, multiple sealing seams are reduced, lowering the risk of coolant leakage. This invention solves the technical problems of existing battery pack liquid cooling solutions, which often use independent water cooling plates laid flat at the bottom of the battery, with the water cooling plate and the chamber assembled separately. These solutions result in a loose overall structure, poor chamber load-bearing capacity, and large load deformation. Conventional water cooling channels have large cross-sections, resulting in low coolant flow rates and poor heat exchange efficiency on both sides. Furthermore, the assembly process of the separate water cooling plate and the chamber is complex, and the chamber forming only involves a single sheet metal process, leading to poor structural strength adjustability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a liquid-cooled battery pack provided by the present invention.

[0018] Figure 2 This is an exploded view of the side sealing plate and the front sealing plate in a liquid-cooled battery pack provided by the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of a liquid-cooled battery pack provided by the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of the front panel of the liquid cooling plate compartment in a liquid-cooled battery pack provided by the present invention.

[0021] Figure 5 This is a schematic diagram of the internal structure of the front sealing plate in a liquid-cooled battery pack provided by the present invention.

[0022] Figure 6 A schematic diagram of the insulation treatment structure of a liquid-cooled battery pack provided by the present invention. Figure 1 .

[0023] Figure 7 A schematic diagram of the insulation treatment structure of a liquid-cooled battery pack provided by the present invention. Figure 2 .

[0024] Figure 8 An exploded view of the liquid cooling plate compartment in a liquid-cooled battery pack provided by the present invention.

[0025] Figure 9 This is a schematic diagram of the structure of a liquid cooling plate in a liquid-cooled battery pack provided by the present invention.

[0026] Figure 10 This is a schematic diagram of the structure of a water nozzle sealing plate in a liquid-cooled battery pack provided by the present invention.

[0027] Figure 11 This is a schematic diagram of the structure of the two side plates inside the liquid cooling plate compartment of a liquid-cooled battery pack provided by the present invention.

[0028] Attached diagram labels: 1. Liquid-cooled plate compartment; 1.1. Liquid-cooled plate; 1.2. Upper plate of liquid-cooled plate compartment; 1.3. Lower plate of liquid-cooled plate compartment; 1.4. Rear plate of liquid-cooled plate compartment; 1.5. Front plate of liquid-cooled plate compartment; 1.6. Internal side plates of liquid-cooled plate compartment; 1.7. Liquid-cooled plate water nozzle; 1.1.1. Pipe; 1.1.2. Rear sealing plate; 1.1.3. Front flow channel; 1.1.4. Water nozzle sealing plate; 2. Side sealing plate; 3. Front sealing plate; 4. Explosion-proof valve; 5. Side sealing plate pressure strip; 6. Front sealing plate pressure strip; 7. Battery insulation pressure strip; 8. Battery; 9. Series aluminum busbar one; 1 0. Series aluminum busbar 2; 11. Slave control fixed plate; 12. Gas fire extinguishing nozzle; 13. Slave control communication connector; 14. Fire communication connector; 15. Positive power connector; 16. Negative power connector; 17. Fire detector; 18. Slave control board; 19. Fuse; 20. Insulator; 21. Output aluminum busbar 1; 22. Series aluminum busbar 3; 23. Output aluminum busbar 2; 24. Output aluminum busbar 3; 25. Insulating thermal conductive rubber pad; 26. Front insulation plate; 27. Rear insulation plate; 28. Upper and lower insulation plates; 29. ​​Intermediate spacer insulation plate; 30. Front and rear spacer insulation plates. Detailed Implementation

[0029] To address the aforementioned technical problems, the present invention provides a liquid-cooled battery pack. The technical solution and embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0030] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can refer to fixed connection, detachable connection, or integral connection; for those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0033] like Figures 1 to 11 As shown, the present invention provides a liquid-cooled battery pack, including a liquid-cooled plate compartment 1, in which the battery pack is disposed. The liquid-cooled plate compartment 1 is formed by welding together an upper liquid-cooled plate compartment 1.2, a rear liquid-cooled plate compartment 1.4, a front liquid-cooled plate compartment 1.5, and a lower liquid-cooled plate compartment 1.3. A liquid-cooled plate 1.1 is disposed in the middle position inside the liquid-cooled plate compartment 1. The liquid-cooled plate 1.1 is formed by welding together a pipe 1.1.1, a rear sealing plate 1.1.2, a front flow channel 1.1.3, and a water nozzle sealing plate 1.1.4. The liquid-cooled plate compartment 1 is an integrated assembly structure with high overall load-bearing strength and small deformation under load. The compartment forming process adopts casting welding or sheet metal processing welding. Casting welding is used for high-strength scenarios, and sheet metal welding is used for lightweight and low-cost scenarios.

[0034] Pipeline 1.1.1 is a duct-type profile. The duct-type profile is used to set a narrow flow channel in the middle, which reduces the flow channel area, increases the flow rate of coolant, and increases the heat transfer coefficient of the side wall of pipeline 1.1.1. The outer walls on both sides of pipeline 1.1.1 are attached to the battery modules on the left and right sides to achieve simultaneous cooling on both sides, with a smaller temperature difference and higher heat dissipation efficiency. The front sealing plate 3 and the side sealing plate 2 seal the liquid cooling plate compartment 1.

[0035] In one optional embodiment, two liquid cooling plate nozzles 1.7 are provided on the front plate 1.5 of the liquid cooling plate compartment. The front plate 1.5 of the liquid cooling plate compartment has through holes. The liquid cooling plate nozzles 1.7 are inserted into the interface of the front flow channel 1.1.3 through the through holes and welded. A rear sealing plate 1.1.2 is welded to the rear end of the pipe 1.1.1. Two nozzle sealing plates 1.1.4 are welded to the front end of the pipe 1.1.1. The front end of the two nozzle sealing plates 1.1.4 is welded to the front flow channel 1.1.3. The two nozzle sealing plates 1.1.4 and the front flow channel 1.1.3 are brazed to form a closed cooling medium circuit. The front end of the liquid cooling plate compartment 1 achieves dual-channel heat exchange through the two nozzle sealing plates 1.1.4 and the front flow channel 1.1.3. The coolant fully contacts the heat exchange wall surface, improving the heat exchange utilization rate.

[0036] In one optional embodiment, a liquid-cooled plate rear plate 1.4 is welded to the rear end of the upper liquid-cooled plate housing 1.2, a liquid-cooled plate front plate 1.5 is welded to the front end of the upper liquid-cooled plate housing 1.2, a liquid-cooled plate lower plate 1.3 is welded to the lower end of the rear liquid-cooled plate housing 1.4, and the lower end of the front liquid-cooled plate 1.5 is welded to the lower liquid-cooled plate housing 1.3. The liquid-cooled plate housing 1 is an integrated assembly structure with high overall load-bearing strength and small deformation under load. The housing forming process uses casting welding or sheet metal processing welding. Casting welding is used in high-strength scenarios, and sheet metal welding is used in lightweight and low-cost scenarios.

[0037] In one optional embodiment, the upper plate 1.2, lower plate 1.3, and rear plate 1.4 of the liquid-cooled plate compartment are all provided with grooves. The liquid-cooled plate 1.1 is embedded in the grooves of the upper plate 1.2, lower plate 1.3, and rear plate 1.4 and is welded and fixed respectively. The upper plate 1.2 and lower plate 1.3 of the liquid-cooled plate compartment are both provided with insertion slots. The upper plate 1.2 and the liquid-cooled plate 1.4 of the liquid-cooled plate compartment are connected to the liquid-cooled plate compartment. The inner side plates 1.6 of the liquid-cooled plate compartment are inserted and welded between the insertion slots of the lower plate 1.3 of the compartment. The liquid-cooled plate 1.1 is directly embedded into the grooves of each plate of the liquid-cooled plate compartment 1 and welded. The liquid-cooled plate 1.1 also serves as a heat exchange component and an internal reinforcing rib of the liquid-cooled plate compartment 1, which greatly improves the overall load-bearing capacity and significantly reduces the load deformation. The liquid-cooled plate 1.1 is first integrally welded and then spliced ​​with the liquid-cooled plate compartment 1, reducing multiple sealing joints and reducing the risk of coolant leakage.

[0038] In one optional embodiment, the battery pack includes multiple batteries 8 placed inside the liquid cooling plate chamber 1 and located on the left and right sides of the liquid cooling plate 1.1. A front and rear spacer insulating plate 30 is fixed between every two adjacent batteries 8, and a middle spacer insulating plate 29 is fixed between every two adjacent batteries 8. Insulating thermally conductive pads 25 are fixed on both sides of the liquid cooling plate 1.1. The middle spacer insulating plate 29 and the front and rear spacer insulating plates 30 are fixedly connected to the insulating thermally conductive pads 25. A front end insulating plate 26 is fixed to the rear side of the two side plates 1.6 inside the liquid cooling plate chamber, and a rear end insulating plate 27 is fixed to the front side of the rear plate 1.4 of the liquid cooling plate chamber. Upper and lower insulating plates 28 are fixed to the inner sides of the two side sealing plates 2. The insulating thermally conductive pads 25 are attached to the liquid cooling plate 1.1 to increase the thermal contact area and insulation effect of the bottom of the battery 8. The front end insulating plate 26, rear end insulating plate 27, upper and lower insulating plates 28, middle spacer insulating plate 29, and front and rear spacer insulating plate 30 are used to insulate the battery 8 to prevent damage to the blue film of the battery 8 and increase safety risks.

[0039] In one optional embodiment, fuses 19 and insulators 20 are fixed on the two side plates 1.6 inside the liquid-cooled plate compartment. An output aluminum busbar 21 is fixed at the negative output position on the upper left side of the battery pack. The output aluminum busbar 21 is fixedly connected to the negative power connector 16. An output aluminum busbar 23 is fixed at the front end of the two side plates 1.6 inside the liquid-cooled plate compartment. The output aluminum busbar 23 is fixedly connected to the positive power connector 15 and fuses 19. An output aluminum busbar 34 is fixed at the positive output position on the upper right side of the battery pack. The output aluminum busbar 324 is fixedly connected to fuses 19. The front end of the front plate 1.5 of the liquid-cooled plate compartment is fixed with a negative power connector 16, a positive power connector 15, a gas fire nozzle 12, a slave control fixing plate 11, a slave control communication connector 13, a fire communication connector 14, a fire detector 17, and a slave control plate 18. Fuses 19, conductive busbars, etc. can be directly fixed at the front end of the front plate 1.5 of the liquid-cooled plate compartment. All connections are in an open state for easy subsequent maintenance.

[0040] In one optional embodiment, a battery insulating strip 7 is fixed to the upper end of the battery 8. The battery 8 is fixed with series aluminum busbar 1 9 and series aluminum busbar 2 10 by external stud fasteners. A series aluminum busbar 3 22 is fixed at the negative output position at the lower end of the battery pack. The battery insulating strip 7 is used to press the battery 8 tightly, which helps to prevent shaking that could cause it to protrude or reduce its fit with the liquid cooling plate 1.1. In this solution, the battery terminal type is nut type, which is fastened with bolts for easy subsequent maintenance. Alternatively, the battery terminal type can be welded.

[0041] In one optional embodiment, side sealing plates 2 are fixed on both the left and right sides of the liquid-cooled plate compartment 1, and a front sealing plate 3 is fixed on the front side of the liquid-cooled plate compartment 1. Side sealing plate pressure strips 5 and front sealing plate pressure strips 6 are respectively attached to the side sealing plates 2 and the front sealing plate 3. An explosion-proof valve 4 is fixed to the front end of the front sealing plate 3. After the side sealing plate pressure strips 5 and the front sealing plate pressure strips 6 are attached, they are fixed by the side sealing plates 2 and the front sealing plate 3. The protection level can reach IP67, sealing the liquid-cooled plate compartment 1 into an independent closed space. When a single cell thermally runs away, the compartment restrains the flame and high-temperature smoke from spreading outward and prevents it from spreading to the whole vehicle. With the help of the explosion-proof valve 4, the internal high-temperature and high-pressure gas can be released in a controllable manner to avoid the compartment from exploding. The sealing plates are reserved with lifting holes for easy transportation.

[0042] Working principle: Coolant flows in through the upper inlet side liquid cooling plate nozzle 1.7, passes through the front flow channel 1.1.3 and merges into the inlet of the two nozzle sealing plates 1.1.4. After the two inlets, the coolant is split into two streams and enters the pipe 1.1.1 for heat exchange. After the heat exchange is completed, the two streams flow back to the nozzle sealing plate 1.1.4, and then enter the front flow channel 1.1.3 to merge. The coolant is discharged from the lower outlet side liquid cooling plate nozzle 1.7. The batteries 8 on the left and right sides of the liquid cooling plate 1.1 are in contact with the liquid cooling plate 1.1. The liquid cooling plate 1.1 absorbs the heat generated by the batteries 8 to cool the batteries.

[0043] The above description is merely a preferred embodiment of the present invention, and the specific embodiments described above are not intended to limit the present invention. Various modifications and variations can be made within the scope of the technical concept of the present invention. All refinements, modifications, or equivalent substitutions made by those skilled in the art based on the above description are within the scope of protection of the present invention.

Claims

1. A liquid-cooled battery pack, characterized in that, The device includes a liquid-cooled plate compartment (1), which houses a battery pack. The liquid-cooled plate compartment (1) is formed by welding together an upper plate (1.2), a rear plate (1.4), a front plate (1.5), and a lower plate (1.3). A liquid-cooled plate (1.1) is located in the middle of the liquid-cooled plate compartment (1). The liquid-cooled plate (1.1) is formed by welding together a pipe (1.1.1), a rear sealing plate (1.1.2), a front flow channel (1.1.3), and a water nozzle sealing plate (1.1.4). The pipe (1.1.1) is a duct-type profile. Side sealing plates (2) are fixed on both the left and right sides of the liquid-cooled plate compartment (1), and a front sealing plate (3) is fixed on the front side of the liquid-cooled plate compartment (1).

2. The liquid-cooled battery pack according to claim 1, characterized in that, Two liquid cooling plate nozzles (1.7) are provided on the front plate (1.5) of the liquid cooling plate compartment. The front plate (1.5) of the liquid cooling plate compartment has through holes. The liquid cooling plate nozzles (1.7) are inserted into the interface of the front flow channel (1.1.3) through the through holes and welded.

3. A liquid-cooled battery pack according to claim 2, characterized in that, The rear end of the pipe (1.1.1) is welded with a rear sealing plate (1.1.2), and the front end of the pipe (1.1.1) is welded with two water nozzle sealing plates (1.1.4), and the front end of the two water nozzle sealing plates (1.1.4) is welded with a front flow channel (1.1.3).

4. A liquid-cooled battery pack according to claim 1, characterized in that, The upper plate (1.2) of the liquid-cooled plate compartment is welded to the rear end of the liquid-cooled plate compartment rear plate (1.4), the upper plate (1.2) of the liquid-cooled plate compartment front plate (1.5) is welded to the front end of the liquid-cooled plate compartment front plate (1.5), the lower end of the liquid-cooled plate compartment rear plate (1.4) is welded to the lower end of the liquid-cooled plate compartment lower plate (1.3), and the lower end of the front plate (1.5) of the liquid-cooled plate compartment is welded to the lower plate (1.3).

5. A liquid-cooled battery pack according to claim 1, characterized in that, The upper plate (1.2), lower plate (1.3), and rear plate (1.4) of the liquid-cooled plate compartment are all provided with grooves. The liquid-cooled plate (1.1) is embedded in the grooves of the upper plate (1.2), lower plate (1.3), and rear plate (1.4) of the liquid-cooled plate compartment and is welded and fixed respectively. The upper plate (1.2) and lower plate (1.3) of the liquid-cooled plate compartment are both provided with insertion slots. The inner side plates (1.6) of the liquid-cooled plate compartment are inserted between the insertion slots of the upper plate (1.2) and lower plate (1.3) of the liquid-cooled plate compartment and are welded and fixed.

6. A liquid-cooled battery pack according to claim 5, characterized in that, The battery pack includes multiple batteries (8) placed inside the liquid cooling plate chamber (1) and located on the left and right sides of the liquid cooling plate (1.1). A front and rear spacer insulating plate (30) is fixed between each pair of adjacent batteries (8), and a middle spacer insulating plate (29) is fixed between each pair of adjacent batteries (8). Insulating thermally conductive rubber pads (25) are fixed on both sides of the liquid cooling plate (1.1). The middle spacer insulating plate (29) and the front and rear spacer insulating plates (30) are fixedly connected to the insulating thermally conductive rubber pads (25). A front end insulating plate (26) is fixed on the rear side of the two side plates (1.6) inside the liquid cooling plate chamber, and a rear end insulating plate (27) is fixed on the front side of the rear plate (1.4) of the liquid cooling plate chamber. Upper and lower insulating plates (28) are fixed on the inner sides of the two side sealing plates (2).

7. A liquid-cooled battery pack according to claim 1, characterized in that, The front end of the liquid-cooled plate cabin front plate (1.5) is fixed with a negative power connector (16), a positive power connector (15), a gas fire nozzle (12), a slave control fixing plate (11), a slave control communication connector (13), a fire communication connector (14), a fire detector (17), and a slave control plate (18).

8. A liquid-cooled battery pack according to claim 7, characterized in that, A fuse (19) and an insulator (20) are fixed on the two side plates (1.6) inside the liquid-cooled plate chamber. An output aluminum busbar one (21) is fixed at the negative output position on the upper left side of the battery pack. The output aluminum busbar one (21) is fixedly connected to the negative power connector (16). An output aluminum busbar two (23) is fixed at the front end of the two side plates (1.6) inside the liquid-cooled plate chamber. The output aluminum busbar two (23) is fixedly connected to the positive power connector (15) and the fuse (19). An output aluminum busbar three (24) is fixed at the positive output position on the upper right side of the battery pack. The output aluminum busbar three (24) is fixedly connected to the fuse (19).

9. A liquid-cooled battery pack according to claim 1, characterized in that, The battery (8) is fixed with a battery insulating strip (7) at the upper end. The battery (8) is fixed with a series aluminum busbar one (9) and a series aluminum busbar two (10) by external stud fasteners. The battery pack is fixed with a series aluminum busbar three (22) at the negative terminal output position at the lower end of the battery pack.

10. A liquid-cooled battery pack according to claim 1, characterized in that, The side sealing plate (2) and the front sealing plate (3) are respectively attached with side sealing plate pressure strip (5) and front sealing plate pressure strip (6), and an explosion-proof valve (4) is fixed at the front end of the front sealing plate (3).

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