New energy automobile battery heat exchange system

Abstract

The invention provides a new energy automobile battery heat exchange system, comprising: a battery module comprising a plurality of cells; the heat exchange device comprises a hollow bottom plate, a frame body and a top plate, a liquid inlet is formed in one side of the bottom plate, a liquid outlet is formed in one side of the top plate, a plurality of communicating parts are evenly distributed on the top plate and the bottom plate respectively, the interiors of the bottom plate, the frame body and the top plate are communicated through the communicating parts, and a plurality of containing spaces are formed in the frame body. The plurality of battery cells are respectively inserted into the plurality of accommodating spaces; the protection box is used for bearing the heat exchange device, air cooling channels are arranged between the top wall of the protection box and the two side walls in the length direction and the outer wall of the heat exchange device, and an air inlet and an air outlet are formed in the two opposite sides of the protection box correspondingly. According to the invention, the plurality of accommodating spaces are arranged to uniformly dissipate heat of each battery cell, and when an individual battery cell is abnormal, other battery cells are prevented from being damaged through isolation of the accommodating spaces. By arranging the air cooling channel, the heat exchange effect of the heat exchange device on each battery cell is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery heat dissipation, and in particular to a battery heat exchange system for new energy vehicles. Background Art

[0002] With the gradual improvement of people's environmental awareness, the popularity rate of electric vehicles is getting higher and higher. During the use of the battery, a large amount of heat will be generated, and it is necessary to cool it down. At this time, it is necessary to transfer the heat dissipated by the battery to the outside through heat exchange to protect the battery and thus ensure the normal and stable operation of the equipment. Currently, coolant is usually used to take away the heat generated by the battery to achieve the purpose of cooling the battery. However, most of them only exchange heat with the bottom surface and side walls of the battery pack, and the heat exchange effect is poor. In addition, the cooling effect of the coolant on the replacement batteries at different positions on its flow path is different, which affects the service life of the replacement batteries. Summary of the Invention

[0003] The main purpose of the present invention is to provide a battery heat exchange system for new energy vehicles to solve the problems existing in the prior art, such as poor heat exchange effect of the battery, and different cooling effects of the coolant on the replacement batteries at different positions on its flow path, which affect the service life of the replacement batteries.

[0004] To solve the above problems, the present invention adopts the following technical solution. A battery heat exchange system for new energy vehicles includes: a battery module, including a plurality of battery cells; a heat exchange device, including a bottom plate, a frame body and a top plate with a hollow interior. An inlet is provided on one side of the bottom plate, and an outlet is provided on one side of the top plate. A plurality of communication parts are evenly distributed on the top plate and the bottom plate respectively. The interiors of the bottom plate, the frame body and the top plate are connected through the plurality of communication parts. A plurality of accommodation spaces are provided in the frame body, and the plurality of battery cells are respectively inserted into the plurality of accommodation spaces; a protective box for carrying the heat exchange device. An air-cooling channel is provided between the top wall and the two side walls in the length direction of the protective box and the outer wall of the heat exchange device. An air inlet and an air outlet are respectively provided on the opposite sides of the protective box.

[0005] Further, the frame body includes a rectangular frame that penetrates up and down, a plurality of horizontal partitions and a plurality of vertical partitions fixed in the rectangular frame. The plurality of horizontal partitions and the plurality of vertical partitions divide the interior of the rectangular frame into a plurality of accommodation spaces. The interiors of the plurality of horizontal partitions, the plurality of vertical partitions and the rectangular frame are all hollow structures and are interconnected. A plurality of through holes communicating with the interior are respectively opened at the top end and the bottom end of the frame body for receiving the plurality of communication parts.

[0006] Further, the communication part includes a sleeve. One end of the sleeve is located inside the bottom plate or the top plate, and the other end of the sleeve extends into the interior of the frame body. A check valve assembly is provided at one end of the sleeve close to the frame body.

[0007] Further, a valve chamber is provided at one end of the interior of the sleeve close to the frame body. The diameter of the valve chamber is larger than the inner diameter of the sleeve, so that a step is formed between the valve chamber and the inner wall of the sleeve. A plurality of openings communicating with the outside are provided on the side wall of the valve chamber. The check assembly includes a sphere slidably disposed in the valve chamber and an elastic part for pushing the sphere to move towards the step. The diameter of the sphere is larger than the inner diameter of the sleeve.

[0008] Further, the elastic part is a compression spring.

[0009] Further, one end of the sleeve close to the frame body is detachably connected with a cover plate, and two ends of the compression spring respectively abut against the cover plate and the sphere.

[0010] Further, safety valves are provided at the tops of the plurality of battery cells, and a plurality of ventilation openings penetrating up and down are provided on the top plate. The bottoms of the plurality of ventilation openings respectively cover the tops of the plurality of safety valves.

[0011] Further, stoppers are respectively fixedly provided at the four corners inside the protection box. The opposite surfaces of the two stoppers on both sides in the length direction of the protection box are inner sides. Two sides in the length direction of the heat exchange device respectively abut against the inner sides of the corresponding stoppers, so that a U-shaped air-cooling channel is formed between the interior of the protection box and the heat exchange device.

[0012] Further, a plurality of grooves are provided on the top surface of the bottom plate. The plurality of grooves are adapted to the bottoms of the plurality of battery cells and are used for carrying and covering the bottoms of the plurality of battery cells.

[0013] Further, a plurality of grooves are provided on the bottom surface of the top plate. The plurality of grooves are adapted to the tops of the plurality of battery cells and are used for carrying and covering the tops of the plurality of battery cells.

[0014] The beneficial effects of the present invention are as follows: By providing a plurality of accommodation spaces, each battery cell can be fully and evenly cooled. Compared with the prior art, the heat dissipation efficiency is improved. At the same time, when an individual battery cell has an abnormality, through the isolation of the accommodation space, damage to other battery cells can be avoided. By providing an air-cooling channel, the heat exchange device can be cooled to improve the heat exchange effect of the heat exchange device on each battery cell. At the same time, when an individual battery cell has an abnormality, the smoke generated by the battery cell can be quickly discharged through the air-cooling channel, avoiding affecting other battery cells and causing the loss to expand. Description of the Drawings

[0015] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0016] Figure 1Isometric view of the battery thermal exchange system of the new energy vehicle of the present invention; Figure 2 Schematic internal structure diagram of the battery thermal exchange system of the new energy vehicle of the present invention; Figure 3 Isometric view of the heat exchange device of the present invention; Figure 4 Schematic installation structure diagram of the battery module of the present invention; Figure 5 Exploded structure schematic diagram of the heat exchange component of the present invention; Figure 6 Schematic internal structure diagram of the housing of the present invention; Figure 7 Schematic bottom surface structure diagram of the top plate; Figure 8 Cross-sectional view of the heat exchange component of the present invention; Figure 9 Is Figure 8 Enlarged view of part A of; Figure 10 Schematic structure diagram of the air-cooling channel of the present invention.

[0017] Explanation of reference numerals 1. Battery module; 11. Battery cell; 111. Safety valve; 2. Heat exchange device; 21. Bottom plate; 211. Liquid inlet; 212. Groove; 22. Housing; 221. Rectangular frame; 222. Horizontal partition; 223. Vertical partition; 224. Accommodation space; 225. Through hole; 23. Top plate; 231. Liquid outlet; 232. Ventilation port; 24. Connecting part; 241. Sleeve; 2411. Valve chamber; 2412. Step; 2413. Opening; 242. Check valve assembly; 2421. Sphere; 2422. Elastic part; 243. Cover plate; 3. Protection box; 31. Air inlet; 32. Air outlet; 33. Block; 331. Inner side; 4. Air-cooling channel. Detailed implementation manners

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Many specific details are set forth in the following description in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0019] Please refer to Figures 1 to 4As shown, a heat exchange system for a new energy vehicle battery includes a battery module 1, a heat exchange device 2, and a protective box 3. The battery module 1 includes a plurality of battery cells 11 connected in parallel / series to supply power to the electric vehicle. The battery cells 11 are of the prior art and can be selected as square lithium iron phosphate battery cells 11 with a length between 100 and 200 millimeters and a width and height within the range of 60 to 100 millimeters, which will not be elaborated here. Please refer to Figure 4 As shown, the heat exchange device 2 is used to hold a plurality of battery cells 11, that is, a plurality of battery cells 11 are arranged inside the heat exchange device 2 to evenly dissipate heat from the plurality of battery cells 11 through the heat exchange device 2. Please refer to Figure 2 and Figure 10 As shown, the protective box 3 is used to carry the heat exchange device 2, that is, the heat exchange device 2 is placed inside the protective box 3, and there are gaps between the top wall and the two side walls in the length direction of the protective box 3 and the outer wall of the heat exchange device 2. The gaps form an air-cooling channel 4. Air inlets 31 and air outlets 32 are respectively provided on two opposite sides of the protective box 3 for air-cooling the heat exchange device 2 and further exchanging heat with the battery module 1. In other words, by arranging the protective box 3 outside the heat exchange device 2, while protecting the heat exchange device 2, the heat exchange device 2 can also be air-cooled.

[0020] Please continue to refer to Figure 2 and Figure 10 As shown, in this embodiment, stoppers 33 are respectively fixedly provided at the four corners inside the protective box 3. The opposite surfaces of the two stoppers 33 on both sides in the length direction of the protective box 3 are inner side surfaces 331. The two sides in the length direction of the heat exchange device 2 are respectively abutted against the inner side surfaces 331 of the corresponding stoppers 33, so that a U-shaped air-cooling channel 4 is formed between the inside of the protective box 3 and the heat exchange device 2. It should be noted that the air inlets 31 and air outlets 32 of the protective box 3 are connected to the outside to take away the heat inside the protective box 3 through natural wind from the outside or a blower in the prior art. That is, the natural wind from the outside is blown into the protective box 3 through the air inlet 31 by a blower, and then the heat inside the heat exchange device 2 is taken away through the air outlet 32.

[0021] Please refer to Figures 3 and Figure 5As shown, in this embodiment, the heat exchange device 2 includes a bottom plate 21, a frame 22, and a top plate 23 that are fixedly connected in sequence from bottom to top. The interiors of the bottom plate 21, the frame 22, and the top plate 23 are all hollow structures for accommodating the coolant. Specifically, a liquid inlet 211 is provided on one side of the bottom plate 21, and a liquid outlet 231 is provided on one side of the top plate 23. A plurality of communication parts 24 are evenly distributed on the top plate 23 and the bottom plate 21 respectively. The interiors of the bottom plate 21, the frame 22, and the top plate 23 are connected through the plurality of communication parts 24. Thereby, the coolant can enter from the liquid inlet 211 of the bottom plate 21, sequentially pass through the interior of the bottom plate 21, the interior of the frame 22, and the interior of the top plate 23, and then flow out from the liquid outlet 231 to take away the heat of the battery cell 11. It should be noted that the coolant can be liquid water or refrigerant in the prior art, and can be connected to the vehicle's air conditioning system. After the coolant exchanges heat with the battery cell 11, the vehicle's radiator can be used to cool down the coolant, which will not be elaborated here.

[0022] Please refer to Figure 5 and Figure 6 As shown, in this embodiment, a plurality of accommodation spaces 224 are provided in the frame 22, and a plurality of battery cells 11 are respectively inserted into the plurality of accommodation spaces 224. Specifically, the frame 22 includes a rectangular frame 221 that penetrates up and down, a plurality of horizontal partitions 222 and a plurality of vertical partitions 223 fixedly arranged in the rectangular frame 221. The plurality of horizontal partitions 222 and the plurality of vertical partitions 223 divide the interior of the rectangular frame 221 into a plurality of accommodation spaces 224. The interiors of the plurality of horizontal partitions 222, the plurality of vertical partitions 223, and the rectangular frame 221 are all hollow structures and are interconnected. A plurality of through holes 225 communicating with the interior are respectively opened at the top end and the bottom end of the frame 22 for receiving the plurality of communication parts 24, that is, one end of the communication part 24 is inserted into the corresponding through hole 225 to realize the connection of the interiors of the bottom plate 21, the wide body, and the top plate 23.

[0023] It should be noted that by providing the frame 22, the plurality of battery cells 11 are respectively located in the plurality of accommodation spaces 224 to achieve the purpose of uniformly dissipating heat from each battery cell 11. At the same time, through the wrapping of the plurality of horizontal partitions 222, the plurality of vertical partitions 223, the top plate 23, and the bottom plate 21, heat exchange can be performed on each side wall of the battery cell 11. Compared with the heat exchange system in the prior art (which only dissipates heat from the bottom and side walls of the battery pack), the heat dissipation effect is greatly improved, thereby reducing the situation that a certain battery cell 11 in the battery module 1 overheats, causing damage to the battery cell 11 or affecting the life of the battery module 1.

[0024] Please refer to Figure 5 and Figure 7As shown, preferably, a plurality of grooves 212 are provided on the top surface of the bottom plate 21 and the bottom surface of the top plate 23, and are respectively adapted to the bottoms and tops of the plurality of battery cells 11, for carrying and covering the plurality of battery cells 11, so that each battery cell 11 is fixed in each accommodation space 224, preventing the battery cells 11 from shaking while increasing the tightness between the battery cells 11 and the heat exchange device 2, thereby improving the heat dissipation effect.

[0025] Please refer to Figure 4 and Figure 10 As shown, in this embodiment, safety valves 111 are provided at the tops of the plurality of battery cells 11, and a plurality of ventilation openings 232 penetrating up and down are provided on the top plate 23. The bottoms of the plurality of ventilation openings 232 are respectively covered above the plurality of safety valves 111, and the tops of the plurality of ventilation openings 232 are communicated with the top of the U-shaped air-cooling channel 4. It should be noted that the safety valve 111 of the battery cell 11 is a prior art. When the pressure inside the battery rises to a certain level due to various reasons (such as overcharging, over-discharging, short circuit or external high temperature, etc.), the safety valve 111 will automatically open, releasing the gas accumulated inside the battery, thereby reducing the internal pressure and preventing the battery from expanding, deforming or even exploding due to excessive pressure. By providing a plurality of ventilation openings 232 covered above the safety valves 111, when the battery is abnormal, the safety valve 111 will automatically open, discharging the internal gas, and discharging it in time through the air-cooling channel 4, avoiding damage to the entire battery module 1 caused by the gas with too high temperature, and even causing a fire. Additionally, when the battery cell 11 overheats or is about to catch fire, smoke may emerge from the safety valve 111. At this time, the smoke is discharged to the outside in time through the air-cooling channel 4, avoiding affecting other battery cells 11, and at the same time can remind the driver that the battery has a fault.

[0026] Please refer to Figure 8 and Figure 9As shown, in this embodiment, the communication part 24 includes a sleeve 241. One end of the sleeve 241 is located inside the bottom plate 21 or the top plate 23. In other words, one end of the sleeve 241 of the communication part 24 of the bottom plate 21 is located inside the bottom plate 21, and the sleeve 241 of the communication part 24 of the top plate 23 is located inside the top plate 23. The other end extends into the interior of the frame 22, thereby enabling the interiors of the bottom plate 21, the frame 22, and the top plate 23 to communicate with each other. A check valve assembly 242 is provided at one end of the sleeve 241 close to the frame 22. Specifically, a valve chamber 2411 is provided at one end of the interior of the sleeve 241 close to the frame 22. The diameter of the valve chamber 2411 is larger than the inner diameter of the sleeve 241, so that a step 2412 is formed between the valve chamber 2411 and the inner wall of the sleeve 241. A plurality of openings 2413 communicating with the outside are provided on the side wall of the valve chamber 2411. The check valve assembly 242 includes a sphere 2421 slidably disposed in the valve chamber 2411 and an elastic part 2422 for pushing the sphere 2421 to move towards the direction close to the step 2412. Preferably, the elastic part 2422 is a compression spring, and the diameter of the sphere 2421 is larger than the inner diameter of the sleeve 241.

[0027] Preferably, please refer to Figure 9 As shown, a cover plate 243 is detachably connected to one end of the sleeve 241 close to the frame 22. Both ends of the compression spring are respectively abutted against the cover plate 243 and the sphere 2421. By providing the cover plate 243, it is convenient to install the compression spring, as well as for subsequent maintenance and replacement.

[0028] During implementation, the coolant flows into the bottom plate 21 from the liquid inlet 211 to dissipate heat from the bottom surface of the battery module 1. When the coolant in the bottom plate 21 is full, the coolant inside the bottom plate 21 flows into a plurality of sleeves 241 on the bottom plate 21 and pushes against a plurality of spheres 2421. At this time, the elastic part 2422 is compressed, and the coolant can uniformly flow into the frame 22 through a plurality of openings 2413. Similarly, when the coolant in the frame 22 is full, it enters the top plate 23 through a plurality of sleeves 241 on the top plate 23 and then is discharged through the liquid outlet 231.

[0029] It should be noted that by providing a plurality of communication parts 24, the coolant can flow uniformly through the bottom plate 21, the frame 22, and the top plate 23, thereby uniformly dissipating heat from each battery cell 11, avoiding damage to a certain battery cell 11 caused by uneven coolant flow, which may lead to a shortened lifespan of the battery module 1. And by providing the check valve assembly 242, the coolant flow can be made more uniform.

[0030] For example, after the coolant flows into the bottom plate 21 from the liquid inlet 211, when the coolant enters a part of the sleeve 241, due to the blockage of the corresponding check component 242, the coolant will not flow into the frame 22 temporarily, but will flow to other parts that are not filled with coolant. Only after the bottom plate 21 is filled with coolant, the coolant will squeeze each check component 242 due to the external pressure (the coolant can be injected into the bottom plate 21 through a pump body set externally), and then flow into the frame 22. That is, the flow rate and flow volume of the coolant entering the frame 22 are almost the same, thereby ensuring that the multiple battery cells 11 of the battery module 1 can be evenly cooled, and avoiding the problem of uneven heat dissipation of the multiple battery cells 11.

[0031] When the present invention is specifically implemented, first, the multiple battery cells 11 of the battery module 1 are respectively placed in the multiple accommodation spaces 224 of the heat exchange device 2, and then the bottom plate 21, the frame 22 and the top plate 23 in the heat exchange device 2 are fixedly connected to each other. At this time, the bottom surface and the side surface of each battery cell 11 are respectively attached to the bottom plate 21 and the frame 22, and the safety valve 111 on the top surface of the battery cell 11 is connected to the air-cooling channel 4 through the corresponding ventilation port 232. Then, a coolant is injected into the bottom plate 21 from the liquid inlet 211 through an external pump body. When the bottom plate 21 is filled with the coolant, the coolant uniformly flows into the frame 22 through the multiple communication parts 24 evenly distributed on the bottom plate 21. At the same time, with the help of the multiple check components 242, the coolant entering each communication part 24 can flow into the frame 22 with almost equal flow rate and flow volume, thereby ensuring that the multiple battery cells 11 of the battery module 1 can be evenly cooled. Similarly, the multiple communication parts 24 on the top plate 23 are also used to enable the coolant in the frame 22 to flow out evenly.

[0032] When the battery cell 11 overheats or is about to catch fire, smoke may emerge from the safety valve 111. At this time, the smoke can be discharged to the outside in time through the air-cooling channel 4, avoiding affecting other battery cells 11, and at the same time, it can remind the driver that the battery has a fault, so that the driver can take timely precautions.

[0033] By setting multiple accommodation spaces 224, the present invention can fully and evenly cool each battery cell 11. Compared with the prior art, the heat dissipation efficiency is greatly improved. At the same time, when an individual battery cell 11 is abnormal, through the isolation of the accommodation space 224, other battery cells 11 are avoided from being damaged. By setting the air-cooling channel 4, the heat exchange device 2 can be cooled to improve the heat exchange effect of the heat exchange device 2 on each battery cell 11. At the same time, when an individual battery cell 11 is abnormal (overheating or catching fire), the smoke generated by the battery cell 11 can be quickly discharged through the air-cooling channel 4, avoiding affecting other battery cells 11 and causing the loss to expand.

[0034] The above description is only a preferred embodiment of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

Claims

1. A new energy vehicle battery heat exchange system, characterized in that: include: A battery module (1), comprising a plurality of battery cells (11); A heat exchange device (2), comprising a bottom plate (21) with a hollow interior, a frame (22) and a top plate (23); a liquid inlet (211) is provided on one side of the bottom plate (21); a liquid outlet (231) is provided on one side of the top plate (23); a plurality of connecting portions (24) are evenly distributed on the top plate (23) and the bottom plate (21); the interiors of the bottom plate (21), the frame (22) and the top plate (23) are connected via the plurality of connecting portions (24); a plurality of accommodating spaces (224) are provided in the frame (22); and a plurality of battery cells (11) are respectively plugged into the plurality of accommodating spaces (224); A protective box (3) is used to support the heat exchange device (2), and an air cooling channel (4) is provided between the top wall and two side walls in the length direction of the protective box (3) and the outer wall of the heat exchange device (2), and an air inlet (31) and an air outlet (32) are respectively provided on opposite sides of the protective box (3).

2. The new energy vehicle battery heat exchange system according to claim 1, characterized in that: The frame body (22) comprises a rectangular frame (221) that passes through from top to bottom, and a plurality of transverse partitions (222) and a plurality of longitudinal partitions (223) that are fixed in the rectangular frame (221); the plurality of transverse partitions (222) and the plurality of longitudinal partitions (223) divide the interior of the rectangular frame (221) into a plurality of accommodating spaces (224); the plurality of transverse partitions (222), the plurality of longitudinal partitions (223) and the interior of the rectangular frame (221) are all hollow structures and are interconnected; the top and bottom ends of the frame body (22) are respectively provided with a plurality of through holes (225) that are in communication with the interior thereof and are used to receive a plurality of connecting portions (24).

3. The new energy vehicle battery heat exchange system according to claim 1, characterized in that: The connecting portion (24) comprises a sleeve (241), one end of the sleeve (241) is located inside the bottom plate (21) or the top plate (23), the other end of the sleeve (241) extends into the interior of the frame (22), and a non-return assembly (242) is provided at one end of the sleeve (241) close to the frame (22).

4. The new energy vehicle battery heat exchange system according to claim 3, characterized in that: A valve chamber (2411) is provided inside the sleeve (241) at one end close to the frame (22); the diameter of the valve chamber (2411) is larger than the inner diameter of the sleeve (241), so that a step (2412) is formed between the valve chamber (2411) and the inner wall of the sleeve (241); a plurality of openings (2413) communicating with the outside are provided on the side wall of the valve chamber (2411); the non-return assembly (242) comprises a ball (2421) slidably arranged in the valve chamber (2411) and an elastic part (2422) used for pushing the ball (2421) to move in a direction close to the step (2412); the diameter of the ball (2421) is larger than the inner diameter of the sleeve (241).

5. The new energy vehicle battery heat exchange system according to claim 4, characterized in that: The elastic part (2422) is a compression spring.

6. The new energy vehicle battery heat exchange system according to claim 5, characterized in that: One end of the sleeve (241) close to the frame (22) is detachably connected to a cover plate (243), and two ends of the compression spring are respectively in contact with the cover plate (243) and the ball (2421).

7. The new energy vehicle battery heat exchange system according to claim 1, characterized in that: The top ends of the plurality of battery cells (11) are each provided with a safety valve (111), the top plate (23) is provided with a plurality of ventilation holes (232) that pass through from top to bottom, and the bottom ends of the plurality of ventilation holes (232) are respectively covered above the plurality of safety valves (111).

8. The new energy vehicle battery heat exchange system according to claim 1, characterized in that: Blocks (33) are fixedly provided at the four corners of the protection box (3), and the opposing surfaces of the two blocks (33) on both sides of the length direction of the protection box (3) are inner side surfaces (331). The two sides of the length direction of the heat exchange device (2) are respectively in contact with the corresponding inner side surfaces (331) of the block (33), so that a "J"-shaped air cooling channel (4) is formed between the interior of the protection box (3) and the heat exchange device (2).

9. The new energy vehicle battery heat exchange system according to claim 1, characterized in that: The top surface of the bottom plate (21) is provided with a plurality of grooves (212), and the plurality of grooves (212) are adapted to the bottoms of the plurality of battery cells (11) and are used to support and cover the bottoms of the plurality of battery cells (11).

10. The new energy vehicle battery heat exchange system according to claim 1, characterized in that: The bottom surface of the top plate (23) is provided with a plurality of grooves (212), and the plurality of grooves (212) are adapted to the tops of the plurality of battery cells (11) and are used to support and cover the tops of the plurality of battery cells (11).

Images