Battery module and battery device

Abstract

The utility model relates to a battery module and a battery device, the battery module comprises: a shell, the top of which is provided with an opening for adding a cooling liquid, and one side of a bottom plate of the shell is provided with a water outlet; the battery cell is mounted in the shell, and at least part of the battery cell is soaked in the cooling liquid; and the thermal runaway prevention device is used for increasing the flow of the cooling liquid during thermal runaway. The cooling liquid enters the shell from the opening in the top of the shell, the battery cell is arranged in the shell, and at least part of the battery cell is soaked in the cooling liquid to cool the battery cell, so that the contact area of the battery cell and the cooling liquid is large, the heat dissipation efficiency is higher, the cooling liquid flows into the shell below from the water outlet formed in one side of the bottom plate of the shell, and the cooling effect is better. The cooling liquid can horizontally flow while flowing up and down, the flowing distance is increased to enhance the cooling effect, and the thermal runaway prevention device can increase the flow of the cooling liquid when the battery module is in thermal runaway, enhance the heat dissipation effect and prevent the battery module from being damaged.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery heat dissipation, and particularly 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, with air as the cooling medium, and there is a problem of low heat dissipation efficiency; the heat exchange form of cold plate liquid cooling is mainly to introduce a coolant into the cold plate to contact the battery for heat exchange with the battery, and there are 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 a coolant, and a water outlet is provided on one side of the bottom plate of the housing; battery cells installed in the housing and at least part of the battery cells are immersed in the coolant; and a thermal runaway prevention device for increasing the flow rate of the coolant during thermal runaway.

[0005] Optionally, the thermal runaway prevention device is configured as a thermal runaway channel, and / or a control valve, and the control valve is provided at the water outlet and can control the flow rate to increase the flow rate of the coolant during thermal runaway.

[0006] Optionally, the thermal runaway prevention device is configured as the thermal runaway channel, and the position of the thermal runaway channel is higher than the height of the battery cells.

[0007] Optionally, the thermal runaway channel is at least provided on one side wall of the housing, and the battery module further includes a first deflector plate extending to the outside of the housing, and the end of the first deflector plate close to the housing is inclined downward for guiding the coolant flowing out of the thermal runaway channel of the upper layer of the battery module.

[0008] Optionally, the end of the first deflector 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.

[0009] Optionally, the thermal runaway prevention device is configured as the thermal runaway channel, and the battery module further includes a partition plate vertically provided on one side of the water outlet to separate the water outlet from the battery cells, a water passing hole is provided at the lower part of the partition plate, and the thermal runaway channel is provided at the upper part of the partition plate.

[0010] Optionally, the water flow through the thermal runaway channel is greater than that through the water hole.

[0011] Optionally, the position of the thermal runaway channel is higher than the height of the battery cell.

[0012] Optionally, the position of the thermal runaway channel is lower than the height of the battery cell. The thermal runaway channel includes multiple groups of first through-holes arranged at intervals up and down, and the aperture of the first through-holes gradually increases from bottom to top.

[0013] Optionally, the battery module further includes a rectifying plate, which is inclined at the opening of the housing and gradually decreases from the opposite side of the housing where the water outlet is provided to the side where the water outlet is provided. A plurality of openings are formed on the rectifying plate, and the aperture of the openings gradually increases as the rectifying plate decreases.

[0014] Optionally, a plurality of vertically arranged protrusions are provided on the surface of the rectifying plate facing away from the battery cell. The protrusions are arranged on one side of the lower end of the opening, and the size of the protrusions gradually increases in the direction of the decrease of the rectifying plate.

[0015] Optionally, the lower side of the rectifying plate extends towards the partition and has a gap with the partition.

[0016] Optionally, the thermal runaway prevention device is configured as the control valve. The control valve includes an outer cylinder, an inner cylinder disposed within the outer cylinder and fitting with the outer cylinder, and a first driving device for driving the inner cylinder to rotate. The outer cylinder is provided with a water inlet and a drain outlet, and the water inlet and the drain outlet are arranged at intervals along the extending direction of the outer cylinder so that the inner cylinder corresponds to only one of the water inlet and the drain outlet. A plurality of first adjustment areas are provided on the inner cylinder in the circumferential direction to adjust the water flow rate of the water outlet. Each first adjustment area is respectively provided with first water holes with different apertures, and the aperture of the first water holes in one of the first adjustment areas is zero.

[0017] Optionally, the thermal runaway prevention device is configured as the control valve. The control valve includes a first disc, a second disc fitting with the first disc, and a second driving device for driving the first disc to rotate. A notch is provided on one of the first disc and the second disc, and a plurality of second adjustment areas corresponding to the notch are provided on the other of the two. Each second adjustment area is respectively provided with second water holes with different apertures, and the aperture of the second water holes in one of the second adjustment areas is zero.

[0018] Optionally, the thermal runaway prevention device is configured as the thermal runaway channel and the control valve. The thermal runaway channel includes multiple groups of second through holes arranged at intervals up and down, and the aperture of the second through holes is the same as that of the water passing holes. The control valve includes a piston that is arranged on one side of the partition plate close to the water outlet and can move up and down, and a driving rod that drives the piston to move. The piston fits with the partition plate and the inner wall of the housing so that the coolant can only pass through the water passing holes and the thermal runaway channel located below the piston.

[0019] Optionally, the battery cell includes at least two batteries, and a heat conduction strip is provided between adjacent two of the batteries to form a flow channel between the batteries.

[0020] The present disclosure also provides a battery device, including: a cabinet body, an inlet water pipe and an outlet water 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 at intervals up and down in the cabinet body, and the water outlets of adjacent two groups of battery modules are arranged opposite to each other at intervals. At least one water outlet end of the inlet water pipe extends above the battery module at the top and is connected with a spray head, so that the coolant enters the battery module at the top and then flows into the battery modules below in sequence.

[0021] Optionally, the inlet water pipe has multiple 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 arranged between adjacent two water outlet ends.

[0022] Optionally, the battery device further includes a second flow guide plate, one end of the second flow guide plate away from the housing is connected to the inner wall of the cabinet body, and the other relative end is located above the housing and extends into the range of the opening.

[0023] 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 arranged on the inlet water pipe, the second three-way valve is arranged on the outlet water pipe, and the first three-way valve and the second three-way valve are connected to each other for circulation in the cabinet body.

[0024] Optionally, there are multiple battery devices, the inlet water pipe of at least one battery device is connected to a water supply pipe, and the outlet water pipe of at least one battery device is connected to a drain pipe.

[0025] Through the above technical solution, in the battery module provided by the present disclosure, the coolant enters the housing through the opening at the top of the housing. The battery cells are arranged in the housing and at least partially immersed in the coolant to cool the battery cells. In this way, the contact area between the battery cells and the coolant is large, and the heat dissipation efficiency is higher. The coolant flows into the lower housing through the water outlet arranged on one side of the bottom plate of the housing, which can make the coolant flow horizontally while flowing up and down, increasing the flow distance to enhance the cooling effect. In this way, only one water inlet is arranged at the top to achieve the cooling of multiple battery modules, and the structure is simple; the thermal runaway prevention device can increase the flow rate of the coolant when the battery module has a thermal runaway, enhance the heat dissipation effect, and prevent the battery module from being damaged.

[0026] Other features and advantages of the present disclosure will be described in detail in the following specific implementation section. Brief Description of the Drawings

[0027] 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:

[0028] Figure 1 is a schematic structural diagram of the battery module in the present disclosure;

[0029] Figure 2 is a front view of the battery module with a flow guide plate in the present disclosure;

[0030] Figure 3 is a front view of another embodiment of the battery module with a flow guide plate in the present disclosure;

[0031] Figure 4 is a front view of the battery module with a partition plate in the present disclosure;

[0032] Figure 5 is a top view of the battery module with a partition plate in the present disclosure;

[0033] Figure 6 is a schematic structural diagram of the partition plate in the present disclosure;

[0034] Figure 7 is a schematic structural diagram of another embodiment of the partition plate in the present disclosure;

[0035] Figure 8 is a front view of the battery module with a rectifying plate in the present disclosure;

[0036] Figure 9 is a top view of the rectifying plate in the present disclosure;

[0037] Figure 10 is a front view of the battery module with a control valve in the present disclosure;

[0038] Figure 11 is a top view of a battery module with a control valve in the present disclosure;

[0039] Figure 12 is a developed view of an inner cylinder in the present disclosure;

[0040] Figure 13 is a top view of a second embodiment of a battery module with a control valve in the present disclosure;

[0041] Figure 14 is a top view of a first disc in the present disclosure;

[0042] Figure 15 is a top view of a second disc in the present disclosure;

[0043] Figure 16 is a front view of a third embodiment of a battery module with a control valve in the present disclosure;

[0044] Figure 17 is Figure 16 a schematic structural view of a partition plate in the embodiment;

[0045] Figure 18 is a schematic structural view of a parallel connection of battery devices in the present disclosure;

[0046] Figure 19 is a schematic structural view of another embodiment of a battery device in the present disclosure.

[0047] Description of Reference Numerals

[0048] 1. Housing; 101. Opening; 2. Electric Core; 21. Battery; 22. Heat Conductive Strip; 3. Partition Plate; 31. Thermal Runaway Channel; 311. First Through Hole; 312. Second Through Hole; 32. Water Passing Hole; 4. Water Outlet; 5. First Deflector; 6. Flow Channel; 7. Rectifying Plate; 71. Projection; 72. Opening; 8. Gap; 9. Control Valve; 91. Outer Cylinder; 911. Water Inlet; 92. Inner Cylinder; 921. First Adjustment Area; 922. First Water Passing Hole; 93. First Driving Device; 94. First Disc; 941. Notch; 95. Second Disc; 951. Second Adjustment Area; 952. Second Water Passing Hole; 96. Driving Rod; 97. Piston; 10. Cabinet; 11. Water Inlet Pipe; 12. Water Outlet Pipe; 13. Power Device; 14. First Three-Way Valve; 15. Second Three-Way Valve; 16. Water Supply Pipe; 17. Drain Pipe; 18. Fire Pipe; 19. Cooling Coil; 20. Sprinkler; 211. Second Deflector. Detailed Embodiments

[0049] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0050] In the present disclosure, unless otherwise stated, the directional words used, such as "upper, lower, top, and bottom", generally refer to the upper, lower, top, and bottom of the corresponding component in the direction of gravity when in use, and "inside and outside" refer to the inside and outside relative to the outline of the component or structure itself. In addition, it should be noted that the terms used, such as "first, second", etc., are used to distinguish one element from another, and do not have order and importance. In addition, in the description with reference to the drawings, the same mark in different drawings represents the same element.

[0051] like Figure 1-17 As shown, the present disclosure provides a battery module, for example, the battery module can be a battery module, the battery module includes: a shell 1, a top of which has an opening 101 for adding coolant, and a water outlet 4 is opened on one side of the bottom plate of the shell 1; a battery cell 2, which is installed in the shell 1 and the battery cell 2 is at least partially immersed in the coolant; and an anti-thermal runaway device, which is used to increase the flow rate of the coolant in the event of thermal runaway.

[0052] Through the above technical scheme, in the battery module provided by the present invention, the coolant enters the shell 1 from the opening 101 at the top of the shell 1, the battery cell 2 is arranged in the shell 1 and at least partially immersed in the coolant to cool the battery cell 2, so that the contact area between the battery cell 2 and the coolant is large, and the heat dissipation efficiency is higher. The coolant flows into the shell 1 below from the water outlet 4 arranged on one side of the bottom plate of the shell 1. After the coolant enters the shell 1 below, it also flows out from the water outlet 4 on one side. In this way, the coolant can flow horizontally while flowing up and down, increasing the flow distance to enhance the cooling effect. In this way, only one water inlet end is arranged at the top to achieve the cooling of multiple battery modules, and the structure is simple; the thermal runaway protection device can increase the flow rate of the coolant when thermal runaway occurs in the battery module, enhance the heat dissipation effect, and prevent damage to the battery module.

[0053] As an optional embodiment, the thermal runaway prevention device is configured as a thermal runaway channel 31, and / or a control valve 9, which is arranged at the water outlet 4 and can control the flow rate to increase the flow rate of the coolant in the event of thermal runaway. That is, the thermal runaway prevention device is configured as a thermal runaway channel 31, or the thermal runaway prevention device is configured as a control valve 9, or the thermal runaway prevention device is configured as a thermal runaway channel 31 and a control valve 9, and the thermal runaway channel 31 is used to overflow when thermal runaway occurs, so as to increase the flow rate of the coolant and take away more heat, and the control valve 9 can control the output of the coolant, thereby increasing the output of the coolant in the event of thermal runaway.

[0054] As a first alternative embodiment, the thermal runaway prevention device is configured as a thermal runaway channel 31, and the position of the thermal runaway channel 31 is higher than the height of the battery cell 2. For example, the thermal runaway channel 31 is at least provided on one side wall of the housing 1. The battery module further includes a first deflector 5. The first deflector 5 extends to the outside of the housing 1, and one end of the first deflector 5 close to the housing 1 is inclined downward to guide the coolant flowing out of the thermal runaway channel 31 of the upper-layer battery module. Normally, the battery cell 2 is immersed in the coolant. If thermal runaway occurs, the system increases the liquid injection volume, the liquid level rises, and the coolant overflows from the thermal runaway channel 31. At this time, simply increasing the liquid injection volume 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, because the overflowing coolant will only flow into the battery device and will not enter the lower battery module. At this time, the cooperation between the side-wall thermal runaway channel 31 and the first deflector 5 is required to increase the inflow volume of the coolant entering the battery module. After increasing the liquid injection volume, the liquid level in the housing 1 rises. The coolant falls on the first deflector 5 after flowing out of the thermal runaway channel 31, and the first deflector 5 deflects the falling coolant into the housing 1, so that the coolant can reach the thermally runaway battery module faster. Of course, in other embodiments, the thermal runaway channel 31 can also be provided at the top of the housing.

[0055] 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 thermal runaway channel 31 can be provided on one side wall of the housing 1 or on the opposite two side walls. The position of the first deflector 5 corresponds to the position of the thermal runaway channel 31 of the upper battery module. The thermal runaway channels 31 of two adjacent sets of battery modules above and below can be provided on the same side, or on the opposite sides. Of course, they can also be provided on both opposite sides.

[0056] Optionally, as Figure 4-9 shown, the thermal runaway prevention device is configured as a thermal runaway channel 31. The battery module further includes a partition 3. The partition 3 is vertically provided on one side of the water outlet 4 to separate the water outlet 4 from the battery cell 2. A water passing hole 32 is provided at the lower part of the partition 3, and a thermal runaway channel 31 is provided at the upper part of the partition 3. The water passing capacity of the thermal runaway channel 31 is greater than that of the water passing hole 32. The water passing hole 32 is provided at the lower part of the partition 3 to achieve the purpose of controlling the flow rate. The water passing capacity of the water passing hole 32 is less than the water outlet capacity of the water outlet 4, so as to prevent the coolant entering the housing 1 from flowing out of the housing 1 quickly and not being retained. Normally, the coolant flows out through the water passing hole 32 and is discharged from the housing 1 through the water outlet 4. During thermal runaway, the liquid injection volume is increased, the liquid level rises, and the coolant overflows from the thermal runaway channel 31 and enters the lower housing 1 through the water outlet 4 for cooling, which can accelerate the circulation speed of the coolant and can also quickly reach the thermally runaway battery module to add new coolant to the overheated battery module.

[0057] In one embodiment, as Figure 6 shown, the position of the thermal runaway channel 31 is higher than the height of the battery cell 2. Since the battery cell 2 is normally immersed in the coolant and the liquid level is lower than the thermal runaway channel 31, there is no overflow at this time. During thermal runaway, the liquid injection amount is increased, the liquid level rises, and the coolant overflows from the thermal runaway channel 31 and enters the lower housing 1 for cooling.

[0058] In another embodiment, as Figure 7 shown, the position of the thermal runaway channel 31 is lower than the height of the battery cell 2. The thermal runaway channel 31 includes a plurality of groups of first through holes 311 arranged at intervals up and down, and the aperture of the first through holes 311 gradually increases from bottom to top. At this time, it is an incomplete immersion mode. Normally, the battery cell 2 is partially immersed in the coolant. When thermal runaway occurs, the liquid injection amount is increased, and the coolant flows out from the thermal runaway channel 31. The overflow flow rate is larger as the liquid level goes up, which can achieve the purpose of adjusting the gear until the maximum liquid outflow amount is reached.

[0059] Optionally, as Figure 8-9 shown, the battery module further includes a rectifying plate 7. The rectifying plate 7 is inclined and arranged at the opening 101 of the housing 1, and the rectifying plate 7 gradually decreases from the side opposite to the side where the housing 1 is provided with the water outlet 4 to the side where the water outlet 4 is provided. A plurality of through holes 72 are formed on the rectifying plate 7, and the aperture of the through holes 72 gradually increases as the rectifying plate 7 decreases. A plurality of vertically arranged protrusions 71 are provided on the rectifying plate 7. The protrusions 71 are arranged on the surface of the rectifying plate 7 facing away from the battery cell 2. The protrusions 71 are arranged on one side of the lower end of the through hole 72, and the size of the protrusions 71 gradually increases in the direction in which the rectifying plate 7 decreases, that is, the protrusions 71 are arranged on the side of the through hole 72 away from the incoming water. The protrusions 71 start to be arranged from the second through hole 72 along the water flow direction. Of course, baffles are provided on both sides of the rectifying plate 7 extending in the same direction as the water flow direction to prevent the coolant from flowing out from the side. The coolant flowing into the upper housing 1 is in the form of an impact water column, that is, it can only quickly cool one side of the next-level battery module, and there may be a problem of uneven temperature at both ends of the next-level battery module, that is, the temperature is low on the side close to the coolant impact side and high on the side far away. Then, by installing the rectifying plate 7, the effect of uniform flow can be achieved. The coolant flows from the higher end of the rectifying plate 7 to the lower end, and evenly flows into the housing 1 through the through holes 72 while flowing. As the flowing water volume decreases, the aperture of the through holes 72 becomes larger and larger, and gradually increasing protrusions 71 are provided starting from the second through hole 72 to increase the residence time of the coolant, so as to achieve the purpose that the outflow amount of the through hole 72 at the back is the same as that of the through hole 72 in the front.

[0060] Among them, as Figure 8As shown, the lower side of the rectifying plate 7 extends towards the partition plate 3 and there is a gap 8 between it and the partition plate 3. Under the condition of thermal runaway, the system increases the injection volume of the coolant. Since the flow rate of the rectifying plate 7 is limited by a maximum value, it is necessary to introduce the coolant exceeding the passing capacity of the rectifying plate 7 into the battery module through the gap 8 between the rectifying plate 7 and the partition plate 3. One end of the rectifying plate 7 does not exceed the partition plate 3 to ensure that the coolant can flow into the housing 1 instead of directly flowing away from the water outlet 4.

[0061] As a second alternative embodiment, the thermal runaway prevention device is configured as a control valve 9. In one embodiment, as Figure 10-12 shown, the control valve 9 includes an outer cylinder 91 provided at the water outlet 4, an inner cylinder 92 provided inside the outer cylinder 91 and fitting with the outer cylinder 91, and a first driving device 93 for driving the inner cylinder 92 to rotate. The outer cylinder 91 is horizontally arranged at the water outlet 4. The first driving device 93 is connected to the inner cylinder 92 to drive the inner cylinder 92 to rotate. The part of the outer cylinder 91 located inside the housing 1 is provided with a water inlet 911, and the part of the outer cylinder 91 located outside the housing 1 is provided with a drain port. The water inlet 911 and the drain port are arranged at intervals along the extending direction of the outer cylinder 91 so that the inner cylinder 92 only corresponds to one of the water inlet 911 or the drain port, that is, the length of the inner cylinder 92 is less than the length of the outer cylinder 91, and the inner cylinder 92 can only cover one of the water inlet 911 or the drain port. The water output of the housing 1 is controlled by controlling the water passing volume of one of them. The inner cylinder 92 is provided with a plurality of first adjustment areas 921 in the circumferential direction to adjust the water output of the water outlet 4. Each first adjustment area 921 is respectively provided with first water passing holes 922 with different apertures, and the aperture of the first water passing holes 922 in one of the first adjustment areas 921 is zero. The water inlet 911 and the drain port have the same aperture. The first adjustment areas 921 are the same size as the water inlet 911 and the drain port so that the first adjustment areas 921 can cover the water inlet 911 or the drain port. By rotating the inner cylinder 92, different first adjustment areas 921 correspond to the water inlet 911 or the drain port to adjust the liquid output. When rotating to the first adjustment area 921 where the aperture of the first water passing holes 922 is zero, the water outlet 4 is closed.

[0062] Another embodiment, as Figure 13-15As shown, the thermal runaway prevention device is configured as a control valve 9. The control valve 9 includes a first disk 94 near the interior of the housing 1, a second disk 95 disposed outside the first disk 94 and in contact with the first disk 94, and a second driving device for driving the first disk 94 to rotate. A notch 941 is provided on one of the first disk 94 or the second disk 95, and a plurality of second adjustment regions 951 corresponding to the notch 941 are provided on the other. Each second adjustment region 951 is respectively provided with second water passing holes 952 of different apertures, and the aperture of the second water passing holes 952 in one of the second adjustment regions 951 is zero. The first disk 94 and the second disk 95 are horizontally arranged. The second driving device is disposed in the housing 1 for driving the first disk 94 to rotate. The notch 941 can be provided on the first disk 94 or the second disk 95. Taking the case where it is provided on the second disk 95 as an example, the second disk 95 is fixed, and by rotating the first disk 94, different second adjustment regions 951 are made to correspond to the notch 941 to adjust the liquid discharge amount. When rotating to the second adjustment region 951 where the aperture of the second water passing holes 952 is zero, the water outlet 4 is closed.

[0063] As a third alternative embodiment, as Figure 16-17 shown, the thermal runaway prevention device is configured as a thermal runaway channel 31 and a control valve 9. The thermal runaway channel 31 includes multiple groups of second through holes 312 arranged at intervals up and down, and the aperture of the second through holes 312 is the same as the aperture of the water passing holes 32. The control valve 9 includes a piston 97 disposed on one side of the partition 3 near the water outlet 4 and capable of moving up and down, and a driving rod 96 for driving the piston 97 to move. For example, the driving rod 96 is a telescopic rod to reduce the occupied space. The piston 97 is in contact with the partition 3 and the inner wall of the housing 1 so that the coolant can only pass through the water passing holes 32 and the thermal runaway channel 31 located below the piston 97. The piston 97 seals the space between the partition 3 and the housing 1. In this way, even if the liquid level in the housing 1 is higher than the piston 97, the coolant will only flow into the space above the piston 97. The coolant can only pass through the water passing holes 32 and the thermal runaway channel 31 located below the piston 97. By adjusting the position of the piston 97 up and down, the number of exposed second through holes 312 is adjusted to regulate the flow rate. The higher the position of the piston 97, the greater the liquid discharge amount.

[0064] As an optional embodiment, the battery cell 2 includes at least two batteries 21, for example, the battery 21 is a blade battery, and a thermal conductive strip 22 is provided between two adjacent batteries 21 to form a flow channel 6 between the batteries 21. At least two thermal conductive strips 22 are provided, and at least two thermal conductive strips 22 are arranged at intervals and extend in the same direction. The thermal conductive strip 22 is a silicone thermal conductive strip, which can quickly transfer the heat of the battery 21 to the coolant in the battery module, and at the same time, there is a gap between two adjacent batteries 21 to form the flow channel 6, so that the coolant can enter the flow channel 6 to enhance the cooling effect of the battery 21; in addition, the lithium battery itself will produce gas, and the battery 21 will expand after a long time of use. The thermal conductive strip 22 absorbs this expansion on the one hand, and has a good heat insulation effect on the other hand. Even if one of the batteries 21 burns, it will not ignite other batteries 21.

[0065] like Figure 18-19 As shown, the present disclosure also provides a battery device, for example, the battery device can be a battery device, a container, etc., the battery device includes: a cabinet 10, the cabinet 10 is connected to a water inlet pipe 11 and a water outlet pipe 12, for example, a water tank can be arranged at the bottom of the cabinet 10, the water outlet pipe 12 is connected to the water tank to discharge the coolant in the battery device; and the above-mentioned battery modules, the battery modules are provided with a plurality of groups, the plurality of groups of battery modules are arranged in the cabinet 10 at intervals up and down, and the water outlets 4 of two adjacent groups of battery modules are arranged at intervals relative to each other, so that the coolant can enter from one side of the housing 1 and be discharged from the other side. The water flows out from one side to increase the flow distance of the coolant and take away more heat. The water inlet pipe 11 has at least one water outlet end extending to the top of the battery module at the top and is connected to a nozzle 20, so that the coolant enters the battery module at the top and flows into the battery module below in turn. A cooling coil 19 can be set 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 19, and then drips back into the battery module. A fire hose 18 can also be connected to the top of the cabinet 10 to spray the coolant when thermal runaway occurs or a fire breaks out in the cabinet.

[0066] As another optional implementation, Figure 19 As shown, the water inlet pipe 11 has a plurality of water outlet ends spaced apart from each other, each water outlet end extends to the top of one of the battery modules, and there is at least one battery module between two adjacent water outlet ends. Of course, there may also be a plurality of battery modules. By providing a plurality of water outlet ends and nozzles 20, the liquid injection speed of the battery module can be accelerated.

[0067] Another embodiment, such as Figure 3As shown in the figure, the battery device further includes a second flow guide plate 211. One end of the second flow guide plate 211 away from the housing 1 is connected to the inner wall of the cabinet 10, and the other opposite end is located above the housing 1 and extends into the range of the opening 101. The coolant of the upper battery module flows out from the thermal runaway channel 31 and falls on the second flow guide plate 211, and the second flow guide plate 211 guides the coolant into the lower battery module.

[0068] As an alternative implementation, as Figure 18-19 shown in the figure, the battery device further includes a power device 13, a first three-way valve 14, and a second three-way valve 15. The power device 13 and the first three-way valve 14 are arranged on the water inlet pipe 11. The first three-way valve 14 is used to control the on-off of the water inlet pipe 11. The second three-way valve 15 is arranged on the water outlet pipe 12. The second three-way valve 15 is used to control the on-off of the water outlet pipe 12. The first three-way valve 14 and the second three-way valve 15 are connected to each other for internal circulation in the cabinet 10. The power device 13 includes a water tank and a pump. The water tank plays a role in storing water and buffering. The power device 13 injects the coolant into the battery module in the cabinet 10 through the water inlet pipe 11. The first three-way valve 14 and the second three-way valve 15 being interconnected can put the cabinet 10 into an internal circulation state, that is, closing the end of the first three-way valve 14 connected to the water inlet pipe 11 and closing the end of the second three-way valve 15 connected to the water outlet pipe 12. In the normal state, the internal circulation in the cabinet 10 can meet the heat dissipation requirements of the battery module without adding new coolant; when thermal runaway occurs, increase the injection volume and close the second three-way valve 15 to fill the entire battery device with coolant.

[0069] As an alternative implementation, as Figure 18 shown in the figure, there are multiple battery devices. The water inlet pipe 11 of at least one battery device is connected to the water supply pipe 16, and the water outlet pipe 12 of at least one battery device is connected to the drain pipe 17. For example, multiple battery devices can be connected in series or in parallel. When connected in series, the water inlet pipe 11 of the first battery device is connected to the water supply pipe 16 to supply water to the battery device, and the water outlet pipe 12 of the last battery device is connected to the drain pipe 17 to discharge the coolant, and the remaining battery devices are connected through the water outlet pipe 12; when connected in parallel, the water inlet pipe 11 of each battery device is connected to the water supply pipe 16, and the water outlet pipe 12 of each battery device is connected to the drain pipe 17. Multiple battery devices can be connected in parallel through one water supply pipe 16 and one drain pipe 17 without each battery device being individually connected to a pipeline.

[0070] During actual use, a temperature detection device can be arranged in the housing 1 to detect the temperature inside the housing 1. When one or a few battery modules have a relatively high temperature, inject coolant to fill the battery module where thermal runaway occurs. When more battery modules have thermal runaway, increase the injection volume and close the second three-way valve 15 to fill the entire battery device with coolant.

[0071] The preferred embodiments of the present disclosure have been described in detail above in conjunction with 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.

[0072] In addition, it should be noted that, in the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0073] Furthermore, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A battery module, characterized in that: include: A shell having an opening on the top for adding coolant, and a water outlet on one side of the bottom plate of the shell; A battery cell, mounted in the housing and at least partially immersed in the coolant; as well as The thermal runaway prevention device is used to increase the flow rate of the coolant in the event of thermal runaway.

2. The battery module according to claim 1, characterized in that: The thermal runaway prevention device is configured as a thermal runaway channel and / or a control valve, wherein the control valve is disposed at the water outlet and can control the flow rate so as to increase the flow rate of the coolant in the event of thermal runaway.

3. The battery module according to claim 2, characterized in that: The thermal runaway prevention device is configured as the thermal runaway channel, and the position of the thermal runaway channel is higher than the height of the battery cell.

4. The battery module according to claim 3, characterized in that: The thermal runaway channel is at least arranged on one side wall of the shell, and the battery module also includes a first guide plate, which extends to the outside of the shell and is tilted downward near one end of the shell to guide the coolant flowing out of the thermal runaway channel of the upper battery module.

5. The battery module according to claim 4, 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.

6. The battery module according to claim 2, characterized in that: The thermal runaway prevention device is configured as the thermal runaway channel, and the battery module further comprises a partition, which is vertically arranged on one side of the water outlet to separate the water outlet from the battery cell, a water hole is provided at the lower portion of the partition, and the thermal runaway channel is provided at the upper portion of the partition.

7. The battery module according to claim 6, characterized in that: The water flow rate of the thermal runaway channel is greater than the water flow rate of the water hole.

8. The battery module according to claim 6, characterized in that: The position of the thermal runaway channel is higher than the height of the battery cell.

9. The battery module according to claim 6, characterized in that: The position of the thermal runaway channel is lower than the height of the battery core. The thermal runaway channel includes a plurality of groups of first through holes spaced apart from each other, and the apertures of the first through holes gradually increase from bottom to top.

10. The battery module according to claim 8 or 9, characterized in that: The battery module also includes a rectifier plate, which is obliquely arranged at the opening of the shell and gradually lowered from the opposite side of the shell where the water outlet is provided to the side where the water outlet is provided, and a plurality of openings are provided on the rectifier plate and the apertures of the openings gradually increase as the rectifier plate is lowered.

11. The battery module according to claim 10, characterized in that: A surface of the rectifier plate on one side away from the battery core is provided with a plurality of vertically arranged protrusions, the protrusions are arranged on one side of the lower end of the opening and the size of the protrusions gradually increases as the rectifier plate is lowered.

12. The battery module according to claim 10, characterized in that: A lower side of the rectifying plate extends toward the partition plate and a gap is formed between the rectifying plate and the partition plate.

13. The battery module according to claim 2, characterized in that: The thermal runaway prevention device is constructed as the control valve, which includes an outer cylinder, an inner cylinder arranged in the outer cylinder and fitted with the outer cylinder, and a first driving device that drives the inner cylinder to rotate. The outer cylinder is provided with a water inlet and a drain, and the water inlet and the drain are spaced apart along the extension direction of the outer cylinder so that the inner cylinder corresponds to one of the water inlet or the drain, and the inner cylinder is provided with a plurality of first adjustment areas along the circumferential direction to adjust the water output of the water outlet, and each of the first adjustment areas is provided with first water holes with different apertures, and the aperture of the first water holes in one of the first adjustment areas is zero.

14. The battery module according to claim 2, characterized in that: The thermal runaway prevention device is constructed as the control valve, which includes a first disc, a second disc attached to the first disc, and a second driving device for driving the first disc to rotate. One of the first disc or the second disc is provided with a notch, and the other of the two is provided with a plurality of second adjustment areas corresponding to the notch, each of the second adjustment areas is provided with second water holes with different apertures, and the aperture of the second water holes in one of the second adjustment areas is zero.

15. The battery module according to claim 6, characterized in that: The thermal runaway prevention device is constructed as the thermal runaway channel and the control valve, the thermal runaway channel includes a plurality of groups of second through holes spaced apart from each other and the aperture of the second through holes is the same as the aperture of the water hole, the control valve includes a piston which is arranged on a side of the partition close to the water outlet and can move up and down, and a driving rod which drives the piston to move, the piston is fitted with the partition and the inner wall of the shell so that the coolant can pass through the water hole and the thermal runaway channel below the piston.

16. 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 flow channel between the batteries.

17. 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 1-16, the battery module is provided with a plurality of groups, the plurality of groups of the battery modules are arranged in the cabinet at upper and lower intervals and the water outlets of two adjacent groups of the battery modules are arranged relatively at intervals, 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.

18. The battery device according to claim 17, 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.

19. The battery device according to claim 17, 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 located above the shell and extends into the range of the opening.

20. The battery device according to claim 17, 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.

21. The battery device according to claim 17, 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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