Battery module and battery device

Abstract

The present disclosure relates to a battery module and a battery device, the battery module comprising: a housing, the top of which is provided with an opening for adding a cooling liquid, the housing being provided with at least one water outlet for discharging the cooling liquid; and the battery cell is mounted in the shell, and at least part of the battery cell is soaked in the cooling liquid. The cooling liquid enters the shell from the opening in the top of the shell, the battery cell is arranged in the shell, at least part of the battery cell is soaked in the cooling liquid to cool the battery cell, the battery cell is directly soaked in the cooling liquid, so that the contact area of the battery cell and a cooling medium is larger, the cooling speed is higher, at least one water outlet is formed in the shell, and the battery cell is cooled through the cooling liquid. The cooling liquid enters the shell and is discharged into the lower shell from the water outlet, so that the cooling liquid discharged from the upper part can cool the lower battery cell, and the cooling of a plurality of battery modules can be realized by only arranging one water inlet end at the uppermost part, and the structure is simple.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery heat dissipation, and specifically, to a battery module and a battery device. Background Art

[0002] With the sharp increase in the demand for energy storage products, lithium iron phosphate batteries are widely used in the energy storage field. However, due to the characteristics of lithium iron phosphate battery cells themselves, their safety performance and lifespan have become major problems. Currently, the mainstream cooling solutions in the market are air cooling and cold plate liquid cooling. Air cooling mainly uses air conditioning for refrigeration, and the cooling medium is air, which has the problem of low heat dissipation efficiency. The heat exchange form of cold plate liquid cooling is mainly to pass coolant in the cold plate to contact the battery for heat exchange with the battery, which has problems such as large contact thermal resistance and small heat exchange area. Summary of the Utility Model

[0003] The purpose of the present disclosure is to provide a battery module and a battery device, which can solve the above technical problems.

[0004] To achieve the above purpose, the present disclosure provides a battery module, including: a housing having an opening at the top for adding coolant, and the housing is provided with at least one water outlet for discharging the coolant; and battery cells installed in the housing and at least part of the battery cells are immersed in the coolant.

[0005] Optionally, the water outlet is arranged on the bottom plate of the housing, and there is a first flow channel between the battery cells and the bottom plate.

[0006] Optionally, there are several water outlets, and several water outlets are evenly distributed on the bottom plate.

[0007] Optionally, there are several water outlets, and the liquid discharge amount of the water outlet located at the center of the bottom plate is greater than that of the water outlet located at the edge of the bottom plate.

[0008] Optionally, the water outlet includes a slotted opening and a through hole, the aperture of the slotted opening is larger than that of the through hole, the slotted opening is arranged at the center of the bottom plate, the through holes are arranged outside the slotted opening and the distance between the through holes gradually increases from the center of the bottom plate to the edge.

[0009] Optionally, the battery module further includes a switch for controlling the opening and closing of the water outlet.

[0010] Optionally, the switch includes a driving device, a moving plate, and a supporting plate. A first water leakage hole corresponding to the water outlet is formed in the moving plate, and a second water leakage hole corresponding to the water outlet is formed in the supporting plate. The moving plate is disposed between the supporting plate and the bottom plate and is in contact with the supporting plate and the bottom plate. The driving device is connected to the moving plate to drive the moving plate to move in the horizontal direction, so that the first water leakage hole is misaligned or aligned with the water outlet and the second water leakage hole.

[0011] Optionally, the battery module further includes a first diversion plate. The water outlet is disposed on at least one of the bottom plate and / or the side wall of the housing. The first diversion plate extends to the outside of the housing and is inclined downward at one end close to the housing for diverting the coolant flowing out of the water outlet of the upper-layer battery module.

[0012] Optionally, one end of the first diversion plate close to the housing is connected to the top of the side wall of the housing, and the opposite end extends out of the housing.

[0013] Optionally, the battery cell includes at least two batteries, and a heat conducting strip is disposed between adjacent two batteries to form a second flow channel between the batteries.

[0014] The present disclosure further provides a battery device, including: a cabinet body, an inlet pipe and an outlet pipe are connected to the cabinet body; and the above-mentioned battery module. There are several groups of the battery modules, and the several groups of battery modules are arranged up and down in the cabinet body. At least one water outlet end of the inlet pipe extends above the battery module located at the top and is connected with a spray head, so that the coolant enters the battery module located at the top and sequentially flows into the battery modules below.

[0015] Optionally, the inlet pipe has a plurality of water outlet ends arranged at intervals up and down, and each water outlet end extends above one of the battery modules, and at least one battery module is disposed between adjacent two water outlet ends.

[0016] Optionally, the battery cell includes at least two batteries. The batteries located in the same battery module are arranged in parallel with each other, and the batteries in adjacent two groups of battery modules are arranged perpendicular to each other.

[0017] Optionally, the battery device further includes a second diversion plate. One end of the second diversion plate far from the housing is connected to the inner wall of the cabinet body, and the opposite end is inclined downward and located above the housing and extends within the range of the opening.

[0018] Optionally, the battery device further includes a power device, a first three-way valve, and a second three-way valve. The power device and the first three-way valve are disposed on the water inlet pipe, and the second three-way valve is disposed on the water outlet pipe. The first three-way valve and the second three-way valve are connected to each other for internal circulation within the cabinet.

[0019] Optionally, there are multiple battery devices. The water inlet pipe of at least one battery device is connected to a water supply pipe, and the water outlet pipe of at least one battery device is connected to a drain pipe.

[0020] Through the above technical solution, in the battery module provided by the present disclosure, the coolant enters the housing from the opening at the top of the housing. The battery cells are disposed within the housing and at least partially immersed in the coolant to cool the battery cells. Directly immersing the battery cells in the coolant can increase the contact area between the battery cells and the cooling medium and improve the cooling speed. At least one water outlet is provided on the housing. The coolant enters the housing and is discharged from the water outlet to the lower housing. In this way, the coolant discharged from above can cool the battery cells below, and only one water inlet is provided at the top to achieve the cooling of multiple battery modules, with a simple structure.

[0021] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0023] Figure 1 is a schematic structural view of the battery module in the present disclosure;

[0024] Figure 2 is a front view of the battery module in the present disclosure;

[0025] Figure 3 is a top view of the battery module in the present disclosure;

[0026] Figure 4 is a bottom view of the battery module in the present disclosure;

[0027] Figure 5 is a bottom view of another embodiment of the battery module in the present disclosure;

[0028] Figure 6 is a front view of the battery module with a deflector in the present disclosure;

[0029] Figure 7 is a front view of another embodiment of the battery module with a deflector in the present disclosure;

[0030] Figure 8 is the front view of the battery module with a switch in the present disclosure;

[0031] Figure 9 is the developed view of the bottom plate, the moving plate and the support plate in the present disclosure;

[0032] Figure 10 is the schematic structural diagram of the parallel connection of the battery devices in the present disclosure;

[0033] Figure 11 is the schematic structural diagram of another embodiment of the battery device in the present disclosure.

[0034] Explanation of reference numerals

[0035] 1. Housing; 101. Opening; 102. Bottom plate; 103. Water outlet; 1031. Groove; 1032. Through hole; 2. Electric core; 21. Battery; 22. Heat conducting strip; 3. First flow channel; 4. Second flow channel; 5. First deflector; 6. Switch; 61. Driving device; 62. Moving plate; 621. First water leakage hole; 63. Support plate; 631. Second water leakage hole; 7. Cabinet; 8. Water inlet pipe; 9. Water outlet pipe; 10. Power device; 11. First three-way valve; 12. Second three-way valve; 13. Cooling coil; 14. Sprinkler head; 15. Water supply pipe; 16. Drain pipe; 17. Fire pipe; 18. Second deflector. Detailed description of the specific embodiment

[0036] The following will describe in detail the specific embodiments of the present disclosure with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present disclosure, and are not intended to limit the present disclosure.

[0037] In the present disclosure, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" generally refer to the upper, lower, top, and bottom of the corresponding components in the gravity direction in the use state, and "inner, outer" refer to the inner and outer relative to the contour of the component or structure itself. In addition, it should be noted that the terms such as "first, second" are used to distinguish one element from another, and do not have sequence and importance. In addition, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same elements.

[0038] As Figures 1-9As shown, the present disclosure provides a battery module. For example, the battery module can be a battery pack. The battery module includes: a housing 1 having an opening 101 at its top for adding coolant. For example, the top plate may not be provided to increase the area of the opening 101. At least one water outlet 103 for discharging the coolant is provided on the housing 1. The area of the opening 101 is greater than the sum of the areas of all the water outlets 103 so that the coolant can be retained in the housing 1; and battery cells 2 installed in the housing 1 and at least part of the battery cells 2 are immersed in the coolant.

[0039] Through the above technical solution, the coolant enters the housing 1 from the opening 101 at the top of the housing 1. The battery cells 2 are arranged in the housing 1 and at least part of them are immersed in the coolant to cool the battery cells 2. It can be fully immersed or partially immersed. Directly immersing the battery cells 2 in the coolant can make the contact area between the battery cells 2 and the cooling medium larger and the cooling speed faster. At least one water outlet 103 is provided on the housing 1. The coolant enters the housing 1 and is discharged from the water outlet 103 into the lower housing 1. In this way, the coolant discharged from above can cool the battery cells 2 below, and only one water inlet is provided at the top to achieve the cooling of multiple battery modules, with a simple structure.

[0040] As an alternative embodiment, the water outlet 103 is provided on the bottom plate 102 of the housing 1. The coolant entering the housing 1 flows out from the bottom plate 102 into the lower housing 1. A first flow channel 3 is provided between the battery cells 2 and the bottom plate 103, that is, there is a gap between the battery cells 2 and the bottom plate 102. For example, the battery cells 2 can be supported and fixed by means of a mounting bracket.

[0041] As Figure 4 shown, a plurality of water outlets 103 are provided. The plurality of water outlets 103 are evenly distributed on the bottom plate 102. The water outlet 103 can be a slot 1031 or a through hole 1032. In this way, the coolant can be evenly dripped into the lower housing 1 to evenly cool the battery cells 2 in the housing 1, and the dripping method will not cause impact on the battery cells 2 due to water pressure problems.

[0042] In other embodiments, as Figure 5 shown, a plurality of water outlets 103 are provided. The liquid discharge amount of the water outlet 103 located at the center of the bottom plate 102 is greater than the liquid discharge amount of the water outlet 103 located at the edge of the bottom plate 102. The liquid discharge amount at the center of the bottom plate 102 is greater than that at the edge. In this way, the leaked coolant will form a turbulent flow on the surface of the next-layer battery module. Compared with the uniform downward flow, the turbulent flow can continuously change the flow direction and speed of the fluid during the heat transfer process, thereby increasing the contact area between the fluid and the solid heat transfer surface to increase the heat absorption effect of the coolant.

[0043] Optionally, the water outlet 103 includes a slot 1031 and a through hole 1032. The aperture of the slot 1031 is larger than that of the through hole 1032. The slot 1031 is provided at the center of the bottom plate 102, and the through holes 1032 are provided outside the slot 1031 and the distance between the through holes 1032 gradually increases from the center of the bottom plate 102 to the edge. By providing a slot 1031 with a larger aperture at the center of the bottom plate 102 and making the through holes 1032 closer to the center more dense, the liquid discharge amount at the center of the bottom plate 102 is made larger.

[0044] As an alternative embodiment, as Figure 6 shown, the battery module further includes a first deflector 5. The water outlet 103 is provided on the bottom plate 102 of the housing 1, and / or the water outlet 103 is provided on at least one of the side walls of the housing 1. The first deflector 5 extends to the outside of the housing 1 and the end close to the housing 1 is inclined downward for deflecting the coolant flowing out of the water outlet 103 of the upper battery module. The water outlet 103 can be provided on the bottom plate 102, or the water outlet 103 can be provided on at least one side wall of the housing 1, or the water outlet 103 is provided on both the bottom plate 102 and the side walls. The coolant is discharged from the side wall of the housing 1, or is discharged from the top opening 101 during overflow and falls onto the lower first deflector 5. The first deflector 5 deflects the coolant flowing out from above into the housing 1. If thermal runaway occurs and the system increases the liquid injection amount, simply increasing the liquid injection amount can no longer meet the cooling requirements, that is, the coolant cannot reach the thermally runaway battery module in a short time and in sufficient quantity. At this time, the cooperation between the water outlet 103 on the side wall and the first deflector 5 is required to increase the liquid inflow amount of the coolant entering the battery module. After increasing the liquid injection amount, the liquid level in the housing 1 rises. The coolant flows out from the water outlet 103 on the side wall and falls onto the first deflector 5. The first deflector 5 deflects the falling coolant into the housing 1, so that the coolant can reach the thermally runaway battery module faster.

[0045] In one embodiment, one end of the first deflector 5 close to the housing 1 is connected to the top of the side wall of the housing 1, and the opposite end extends out of the housing 1. The water outlet 103 can be provided on one side wall or on the opposite two side walls. The position of the first deflector 5 corresponds to the position of the water outlet 103 of the upper battery module. If the water outlet 103 is only provided on the bottom plate 102, in order to ensure that all the overflowing coolant is deflected into the housing 1, the first deflector 5 needs to be provided around the housing. The water outlets 103 of the upper and lower adjacent battery modules can be provided on the same side, or on the opposite sides, or of course on both opposite sides.

[0046] In another embodiment, water outlets 103 are provided on both the bottom plate and the side wall of the housing 1. The battery module further includes a first guide plate 5 which extends to the outside of the housing 1 and is inclined downward at the end close to the housing 1 for guiding the coolant flowing out of the water outlet 103 of the upper battery module. If thermal runaway occurs and the system increases the liquid injection volume, simply increasing the liquid injection volume can no longer meet the cooling requirements at this time, that is, the coolant cannot reach the thermally runaway battery module in a short time and in sufficient quantity. At this time, the cooperation between the water outlet 103 on the side wall and the first guide plate 5 is required to increase the inflow volume of the coolant entering the battery module. After the liquid level in the housing 1 rises after increasing the liquid injection volume, the coolant flows out of the water outlet 103 on the side wall and falls on the first guide plate 5, and the first guide plate 5 guides the falling coolant into the housing 1, so that the coolant can reach the thermally runaway battery module faster.

[0047] As an alternative implementation, as Figures 8-9 shown, the battery module further includes a switch 6 for controlling the opening and closing of the water outlet 103. The switch 6 can actively close the water outlet 103 to prevent the housing 1 from dripping coolant downward. Under normal working conditions, when multiple housings 1 are filled with coolant, the battery cells 2 can be immersed in the coolant, and there is no need for the coolant to circulate. Therefore, the switch 6 is provided to keep the coolant in the housing 1.

[0048] Optionally, as Figure 9 shown, the switch 6 includes a driving device 61, a moving plate 62 and a supporting plate 63. A first water leakage hole 621 corresponding to the water outlet 103 is formed on the moving plate 62, and a second water leakage hole 631 corresponding to the water outlet 103 is formed on the supporting plate 63. The moving plate 62 is arranged between the supporting plate 63 and the bottom plate 102 and is in contact with the supporting plate 63 and the bottom plate 102. The driving device 61 is connected to the moving plate 62 to drive the moving plate 62 to reciprocate horizontally, so that the first water leakage hole 621 is misaligned or aligned with the water outlet 103 and the second water leakage hole 631. The moving plate 62 and the supporting plate 63 are both arranged parallel to the bottom plate 102. The side part of the supporting plate 63 can be connected to the bottom plate 102 to support the moving plate 62. The moving plate 62 moves horizontally under the drive of the driving device 61. The driving device 61 can be a motor, an electric telescopic rod, etc. Of course, it can also be a magnetic device arranged on both sides of the moving plate 62, such as an electromagnet, and the moving plate 62 is moved to both sides by turning on and off the electromagnets on both sides. When the first water leakage hole 621 is aligned with the water outlet 103 and the second water leakage hole 631, a water outlet channel is formed between the water outlet 103, the first water leakage hole 621 and the second water leakage hole 631, so that the coolant can flow out through the water outlet channel; when the first water leakage hole 621 is misaligned with the water outlet 103 and the second water leakage hole 631, the moving plate 62 blocks the water outlet 103 and the second water leakage hole 631, so that the coolant stays in the housing 1.

[0049] As an alternative implementation, as Figures 1-3 shown, the battery cell 2 includes at least battery cells 21. For example, the battery cells 21 are blade batteries. A heat conduction strip 22 is provided between two adjacent battery cells 21 to form a second flow channel 4 between the battery cells 21. There are at least two heat conduction strips 22, and the heat conduction strips 22 are silicone heat conduction strips, which can quickly transfer the heat of the battery cells 21 into the coolant in the battery module. At the same time, a gap is formed between two adjacent battery cells 21 to form the second flow channel 4, so that the coolant can enter the second flow channel 4 to enhance the cooling effect of the battery cells 21. In addition, the lithium battery itself will generate gas, and the battery cells 21 will expand after being used for a long time. On the one hand, the heat conduction strip 22 absorbs this expansion, and on the other hand, it has a good heat insulation effect, so that even if one of the battery cells 21 catches fire, it will not ignite other battery cells 21.

[0050] As Figures 10-11 shown, the present disclosure also provides a battery device. For example, the battery device can be a battery cabinet, a container, etc. The battery device includes: a cabinet body 7, an inlet water pipe 8 and an outlet water pipe 9 are connected to the cabinet body 7. For example, a water tank can be arranged at the bottom of the cabinet body 7, and the outlet water pipe 9 is connected to the water tank to discharge the coolant in the battery device; and the above-mentioned battery module. There are several groups of battery modules, and several groups of battery modules are arranged up and down in the cabinet body 7. For example, they can be placed through brackets. The inlet water pipe 8 has at least one water outlet end extending above the battery module at the top and is connected with a spray head 14, so that the coolant enters the battery module at the top and flows into the lower battery modules in sequence. A cooling coil 13 can be arranged at the water outlet end above the battery module. When thermal runaway occurs, part of the coolant evaporates and condenses after encountering the cooling coil 13 and then drips back into the battery module again. Multiple battery modules are arranged up and down at intervals in the battery device and are filled with coolant by spraying coolant from the top. A fire fighting pipe 17 can also be connected to the top of the cabinet body 7 to spray coolant when thermal runaway or a fire occurs in the cabinet.

[0051] As another alternative implementation, as Figure 11 shown, the inlet water pipe 8 can also have a plurality of water outlet ends arranged at intervals up and down. Each water outlet end extends above one of the battery modules, and at least one battery module is provided between two adjacent water outlet ends. Of course, several battery modules can also be provided. Setting a plurality of water outlet ends and spray heads 14 can accelerate the liquid injection speed of the battery module.

[0052] As an alternative implementation, the battery cell 2 includes at least two battery cells 21. The battery cells 21 in the same battery module are arranged parallel to each other, and the battery cells 21 in two adjacent groups of battery modules are arranged perpendicular to each other. The battery cells 21 in the upper and lower layers of battery modules are in a vertical state to increase the complexity of the flow channel and the heat dissipation effect.

[0053] As an alternative embodiment, the battery device further includes a second flow guide plate 18. One end of the second flow guide plate 18 away from the housing 1 is connected to the inner wall of the cabinet body, and the opposite end is inclined downward and located above the housing 1 and extends within the range of the opening 101. The coolant of the upper battery module flows out from the water outlet 103 on the side wall and falls on the second flow guide plate 18, and the second flow guide plate 18 guides the coolant into the lower battery module.

[0054] As an alternative embodiment, as Figure 10 shown, the battery device further includes a power device 10, a first three-way valve 11, and a second three-way valve 12. The power device 10 and the first three-way valve 11 are arranged on the water inlet pipe 8, and the second three-way valve 12 is arranged on the water outlet pipe 9. The first three-way valve 11 and the second three-way valve 12 are connected to each other for internal circulation within the cabinet body 7. The power device 10 includes a water tank and a pump, and the water tank plays a role in storing water and buffering. The power device 10 injects the coolant into the battery module within the cabinet body 7 through the water inlet pipe 8. The first three-way valve 11 and the second three-way valve 12 being interconnected can put the cabinet body 7 into an internal circulation state; when thermal runaway occurs, the injection volume is increased and the second three-way valve 12 is closed to fill the entire battery device with the coolant.

[0055] As an alternative embodiment, as Figure 10 shown, there are multiple battery devices. The water inlet pipe 8 of at least one battery device is connected to the water supply pipe 15, and the water outlet pipe 9 of at least one battery device is connected to the drain pipe 16. For example, multiple battery devices can be connected in series or in parallel. When connected in series, the water inlet pipe 8 of the first battery device is connected to the water supply pipe 15 to supply water to the battery device, and the water outlet pipe 9 of the last battery device is connected to the drain pipe 16 to discharge the coolant, and the remaining battery devices are connected through the water outlet pipe 9; when connected in parallel, the water inlet pipe 8 of each battery device is connected to the water supply pipe 15, and the water outlet pipe 9 of each battery device is connected to the drain pipe 16. Multiple battery devices can be connected in parallel through one water supply pipe 15 and one drain pipe 16, without the need to connect pipelines to each battery device individually.

[0056] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0057] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0058] In addition, any combination can be made among various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should equally be regarded as the content disclosed by the present disclosure.

Claims

1. A battery module, characterized in that: include: A shell having an opening at the top for adding coolant, and the shell having at least one water outlet for discharging the coolant; as well as A battery cell is installed in the housing and at least partially immersed in the coolant.

2. The battery module according to claim 1, characterized in that: The water outlet is arranged on the bottom plate of the shell, and a first flow channel is provided between the battery core and the bottom plate.

3. The battery module according to claim 2, characterized in that: There are a plurality of water outlets, and the plurality of water outlets are evenly distributed on the bottom plate.

4. The battery module according to claim 2, characterized in that: There are a plurality of water outlets, and the liquid output of the water outlet located at the center of the bottom plate is greater than the liquid output of the water outlet located at the edge of the bottom plate.

5. The battery module according to claim 4, characterized in that: The water outlet includes a groove and a through hole, the aperture of the groove is larger than the aperture of the through hole, the groove is arranged at the center of the bottom plate, the through hole is arranged outside the groove, and the distance between the through holes gradually increases from the center of the bottom plate to the edge.

6. The battery module according to claim 2, characterized in that: The battery module also includes a switch for controlling the opening and closing of the water outlet.

7. The battery module according to claim 6, characterized in that: The switch includes a driving device, a movable plate and a supporting plate, the movable plate is provided with a first water leakage hole corresponding to the water outlet, the supporting plate is provided with a second water leakage hole corresponding to the water outlet, the movable plate is arranged between the supporting plate and the bottom plate and is in contact with the supporting plate and the bottom plate, the driving device is connected to the movable plate to drive the movable plate to move in a horizontal direction so that the first water leakage hole is misaligned or aligned with the water outlet and the second water leakage hole.

8. The battery module according to claim 1, characterized in that: The battery module also includes a first guide plate, the water outlet is arranged on the bottom plate of the shell and / or the water outlet is arranged on at least one of the side walls of the shell, the first guide plate extends to the outside of the shell and is inclined downward near one end of the shell to guide the coolant flowing out of the water outlet of the upper battery module.

9. The battery module according to claim 8, characterized in that: One end of the first guide plate close to the shell is connected to the top of the side wall of the shell, and the other end extends out of the shell.

10. The battery module according to claim 1, characterized in that: The battery core includes at least two batteries, and a heat-conducting strip is arranged between two adjacent batteries to form a second flow channel between the batteries.

11. A battery device, characterized in that: include: a cabinet body, to which a water inlet pipe and a water outlet pipe are connected; and According to the battery module described in any one of claims 1-10, the battery module is provided with a plurality of groups, and the plurality of groups of the battery modules are arranged up and down in the cabinet, and the water inlet pipe has at least one water outlet end extending to the top of the battery module located at the top and connected to a nozzle, so that the coolant enters the battery module located at the top and flows into the battery modules below in sequence.

12. The battery device according to claim 11, characterized in that: The water inlet pipe has a plurality of water outlet ends spaced apart from each other in the upper and lower parts, each of the water outlet ends extends to the top of one of the battery modules, and at least one battery module is arranged between two adjacent water outlet ends.

13. The battery device according to claim 11, characterized in that: The battery core includes at least two batteries. The batteries in the same battery module are arranged parallel to each other, and the batteries in two adjacent groups of battery modules are arranged perpendicular to each other.

14. The battery device according to claim 11, characterized in that: The battery device further comprises a second guide plate, wherein one end of the second guide plate away from the shell is connected to the inner wall of the cabinet, and the other end of the second guide plate is inclined downward and is located above the shell and extends to the range of the opening.

15. The battery device according to claim 11, characterized in that: The battery device also includes a power device, a first three-way valve and a second three-way valve. The power device and the first three-way valve are arranged on the water inlet pipe, the second three-way valve is arranged on the water outlet pipe, and the first three-way valve and the second three-way valve are connected to each other for circulation in the cabinet.

16. The battery device according to claim 11, characterized in that: The battery device is provided in plurality, the water inlet pipe of at least one of the battery devices is connected to the water supply pipe, and the water outlet pipe of at least one of the battery devices is connected to the drainage pipe.

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