Battery module and battery device

Abstract

The utility model relates to a battery module and a battery device, and the battery module comprises a shell which is provided with a water inlet and a water outlet; the water inlet is connected with the first pipeline, so that cooling liquid can enter the shell through the first pipeline; and the battery cell is mounted in the shell, and at least part of the battery cell is soaked in the cooling liquid. Immersed cooling is adopted, the cooling liquid enters the shell from the first pipeline, 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, and the heat dissipation efficiency is higher.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery heat dissipation, and more 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, with air as the cooling medium, and has the 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 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 that can solve the above technical problems.

[0004] To achieve the above purpose, the present disclosure provides a battery module, including: a housing provided with a water inlet and a water outlet; a first pipeline, the water inlet is connected to the first pipeline so that the coolant can enter the housing through the first pipeline; and a battery cell installed in the housing and at least part of the battery cell is immersed in the coolant.

[0005] Optionally, the battery module further includes a second pipeline connected to the water outlet.

[0006] Optionally, the water inlet and the water outlet are arranged at different heights in the height direction on the side of the housing.

[0007] Optionally, the water inlet and the water outlet are arranged on opposite sides of the housing, or the water inlet and the water outlet are arranged on the same side of the housing.

[0008] Optionally, a plurality of horizontally arranged flow guiding plates are provided in the housing, and the plurality of flow guiding plates are arranged at intervals up and down and two adjacent flow guiding plates are arranged staggeredly so that the coolant can flow in an S shape.

[0009] Optionally, the battery cell includes a plurality of batteries, and a heat conducting strip is provided between two adjacent batteries to form a flow channel between the batteries.

[0010] Optionally, the length of the heat conducting strip is L1, the length of the battery is L2, and 1 / 2L2 < L1 < L2. A plurality of heat conducting strips at the same height all extend along the same end in the length direction of the battery to form the flow guiding plate.

[0011] Optionally, the water inlet direction of the water inlet is the same as the length direction of the battery.

[0012] Optionally, the top of the housing has an opening, and a plurality of drip holes for dripping the coolant are formed in the bottom plate of the housing.

[0013] Optionally, one side of the housing is provided with an openable and closable cover body so that the housing can be configured as a closed cavity.

[0014] Optionally, the cover body is configured as a heat exchange plate with a cooling channel inside to contact the coolant in the housing for heat exchange. An inlet and an outlet connected to the cooling channel are provided on the heat exchange plate.

[0015] The present disclosure also 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, a plurality of the battery modules are provided, and the plurality of battery modules are arranged at intervals up and down in the cabinet body and the outlet and the inlet are sequentially connected through the first pipeline. At least one water outlet end of the inlet pipe is connected to the inlet of the battery module at the top so that the coolant enters the battery module at the top and sequentially flows into the battery modules below.

[0016] Optionally, the inlet pipe has a plurality of water outlet ends arranged at intervals up and down, each water outlet end is respectively connected to the inlet of one of the battery modules, at least one battery module is provided between two adjacent water outlet ends, and the outlet of the battery module at the bottom and located between the two water outlet ends is communicated with the cabinet body to discharge the coolant into the cabinet body.

[0017] 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 pipe, the second three-way valve is arranged on the outlet pipe, and the first three-way valve and the second three-way valve are connected to each other for circulation in the cabinet body.

[0018] Optionally, a plurality of the battery devices are provided, the inlet pipe of at least one battery device is connected to a water supply pipe, and the outlet pipe of at least one battery device is connected to a drain pipe.

[0019] Through the above technical solution, the present disclosure adopts immersion cooling. The coolant enters the housing from the first pipeline, and 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.

[0020] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. Brief Description of the Drawings

[0021] 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 embodiments, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0022] Figure 1 is a schematic structural view of the battery module in the present disclosure;

[0023] Figure 2 is a schematic view for showing the positions of the water inlet and the water outlet, wherein the position of the water inlet is lower than that of the water outlet;

[0024] Figure 3 is a schematic view for showing the positions of the water inlet and the water outlet, wherein the position of the water inlet is higher than that of the water outlet;

[0025] Figure 4 is a front view of the battery module with a flow guide plate in the present disclosure, wherein the water inlet and the water outlet are located on opposite sides;

[0026] Figure 5 is a front view of the battery module with a flow guide plate in the present disclosure, wherein the water inlet and the water outlet are located on the same side;

[0027] Figure 6 is a front view of the battery in the present disclosure;

[0028] Figure 7 is a front view of the housing in the present disclosure, wherein a heat exchange plate is provided on one side of the housing;

[0029] Figure 8 is a top view of the bottom plate of the housing in the present disclosure;

[0030] Figure 9 is a schematic structural view of the battery device in the present disclosure;

[0031] Figure 10 is a schematic structural view of another embodiment of the battery device in the present disclosure;

[0032] Figure 11 is a schematic structural view of the parallel connection of the battery devices in the present disclosure.

[0033] Description of the Reference Numerals

[0034] 1. Housing; 101. Opening; 102. Bottom plate; 103. Drip hole; 104. Water inlet; 105. Water outlet; 2. Battery cell; 21. Battery; 22. Heat conducting strip; 23. Flow guiding plate; 3. Pipeline; 4. Cover body; 41. Liquid inlet; 42. Liquid outlet; 5. Cabinet; 6. Water inlet pipe; 7. Water outlet pipe; 8. Power device; 9. First three-way valve; 10. Second three-way valve; 11. Water supply pipe; 12. Drain pipe; 13. Cooling coil; 14. Fire pipe. Detailed implementation manners

[0035] The following will describe in detail the specific implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0036] In the present disclosure, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" generally refer to the upper, lower, top, and bottom of the corresponding components in the gravity direction under 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 sequentiality and importance. In addition, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same elements.

[0037] As Figures 1-8 shown, the present disclosure provides a battery module. For example, the battery module can be a battery module group. The battery module includes: a housing 1, on which a water inlet 104 and a water outlet 105 are provided; a first pipeline 3, and the water inlet 104 is connected to the first pipeline 3 so that the coolant can enter the housing 1 through the first pipeline 3; and a battery cell 2, which is installed in the housing 1 and at least part of the battery cell 2 is immersed in the coolant.

[0038] Through the above technical solution, the present disclosure adopts immersion cooling. The coolant enters the housing 1 from the first pipeline 3. The battery cell 2 is arranged in the housing 1 and at least part of it is immersed in the coolant to cool the battery cell 2. In this way, the contact area between the battery cell 2 and the coolant is large, and the heat dissipation efficiency is higher. The coolant flows out from the water outlet 105 and enters the lower housing 1. For example, the position of the water outlet 105 can be higher than the bottom plate 102 of the housing 1. In this way, at least part of the coolant can be retained in the housing 1, and the water inlet pressure of the water inlet 104 can also be increased. The water inlet of the water inlet 104 can be pressurized by devices such as a pump, and the water outlet pressure of the water outlet 105 will surely be less than the pressure of the water inlet 104. In this way, the coolant in the housing 1 can be increased to achieve the purpose of immersing the battery cell 2. In this way, only one water inlet end is arranged at the top to realize the cooling of multiple battery modules, and the structure is simple.

[0039] As an alternative embodiment, the battery module further includes a second pipeline 15. The second pipeline 15 is connected to the water outlet 105. The coolant in the housing 1 flows out through the second pipeline 15 and enters the lower housing 1, instead of being connected to the water inlet 104 of this battery module for self-circulation.

[0040] As an alternative embodiment, as Figures 2-5 shown, the water inlet 104 and the water outlet 105 are arranged at different heights in the vertical direction on the side of the housing 1. This can increase the flow distance of the coolant and the contact time with the battery cells 2, thereby enhancing the cooling effect. For example, the position of the water inlet 104 is higher than that of the water outlet 105, or the position of the water inlet 104 is lower than that of the water outlet 105. When the position of the water inlet 104 is lower than that of the water outlet 105, the position of the water outlet 105 is higher than that of the battery cells 2 to achieve the purpose of submerging the battery cells 2.

[0041] Among them, as Figures 4-5 shown, the water inlet 104 and the water outlet 105 are arranged on opposite sides of the housing 1, or the water inlet 104 and the water outlet 105 are arranged on the same side of the housing 1. Arranging the water inlet 104 and the water outlet 105 on opposite sides can increase the flow distance of the coolant, while arranging them on the same side facilitates connecting the pipeline 3 during installation.

[0042] Optionally, as Figures 4-6 shown, a plurality of horizontally arranged flow guiding plates 23 are provided in the housing 1. The plurality of flow guiding plates 23 are arranged at different heights in the vertical direction and two adjacent flow guiding plates 23 are staggered so that the coolant can flow in an S shape. Arranging the flow guiding plates 23 can extend the flow distance of the coolant, thereby increasing the cooling time, and can also make the coolant flow along a set route, preventing the coolant from flowing out of the water outlet 105 without fully contacting the battery cells 2 when the water inlet 104 and the water outlet 105 are arranged on the same side of the housing 1.

[0043] Among them, as Figure 1 and Figure 6As shown in the figure, the battery cell 2 includes a number of batteries 21. For example, the battery 21 is a blade battery. A heat conducting strip 22 is provided between two adjacent batteries 21 to form a flow channel between the batteries 21. The heat conducting strip 22 is a silicone heat conducting strip, which can quickly conduct the heat of the battery 21 into the coolant in the battery module. At the same time, a gap is formed between two adjacent batteries 21 to form a flow channel, which allows the coolant to enter the flow channel to enhance the cooling effect of the battery 21. In addition, the lithium battery itself will generate gas, and the battery 21 will expand after being used for a long time. On the one hand, the heat conducting strip 22 absorbs this expansion, and on the other hand, it has a good heat insulation effect. If one battery 21 burns, it will not ignite the adjacent battery 21. The length of the heat conducting strip 22 is L1, and the length of the battery 21 is L2, and 1 / 2L2 < L1 < L2. A plurality of heat conducting strips 22 at the same height all extend along the same end in the length direction of the battery 21 to form a flow guiding plate 23. By forming the flow guiding plate 23 with the heat conducting strip 22, there is no need to separately set the flow guiding plate 23. At this time, the pipeline 3 connected to the water inlet 104 needs to extend into the range of the flow guiding plate 23 to make the coolant flow along the flow guiding plate 23.

[0044] Optionally, as Figure 1 shown, the water inlet direction of the water inlet 104 is the same as the length direction of the battery 21, that is, it extends in the same direction as the flow guiding plate 23, which is convenient for the coolant to enter the flow channel and flow. If the water inlet direction is perpendicular to the length direction of the battery 21, it cannot be guaranteed that the coolant can enter the flow channel at a relatively long distance from the water inlet 104. For example, a nozzle that can spray the liquid in a dispersed manner can be provided on the pipeline 3 of the water inlet 104 so that the coolant entering the housing 1 can enter multiple flow channels and be in uniform contact with the battery cell 2.

[0045] As an alternative implementation, as Figure 1 and Figure 8 shown, the top of the housing 1 has an opening 101, and a number of drip holes 103 for dripping the coolant are provided on the bottom plate 102 of the housing 1. The water output of the drip holes 103 is less than the water input of the water inlet 104, so that the coolant can be retained in the housing 1. After the coolant enters the housing 1, it drips from a number of drip holes 103 provided on the bottom plate 102 and enters the lower housing 1 through the opening 101, which can make the coolant be in uniform contact with the battery cell 2 and there will be no problem of water pressure impacting the battery cell 2.

[0046] As an alternative implementation, as Figure 7 shown, one side of the housing 1 is provided with an openable cover 4 so that the housing 1 can be constructed as a closed cavity. For example, the cover 4 is provided on the top of the housing 1. The sealed cavity can protect the battery cell 2 in the housing 1. When the battery cell 2 overheats and burns, it will not affect other battery modules, and at the same time, the burning of other battery modules will not affect this battery module either.

[0047] Optionally, the cover 4 can be configured in any suitable structure. Exemplarily, in the present disclosure, the cover 4 is configured as a heat exchange plate with a cooling channel inside to contact the coolant in the housing 1 for heat exchange. The heat exchange plate is provided with a liquid inlet 41 and a liquid outlet 42 connected to the cooling channel. The heat exchange plate can contact and exchange heat with the coolant in the housing 1 to enhance the cooling effect. For example, the liquid inlet 41 can be connected to the water inlet pipe 6 connected to the pipeline 3 at the water inlet 104, and the liquid outlet 42 discharges the coolant into the battery device. Multiple liquid outlets 42 can be connected through a main pipe for unified liquid discharge, or can be individual outlets for separate liquid discharge.

[0048] As Figures 9-11 shown, the present disclosure also provides a battery device. For example, the battery device can be a battery cabinet or a container, etc. The battery device includes: a cabinet body 5, a water inlet pipe 6 and a water outlet pipe 7 are connected to the cabinet body 5. For example, a water tank can be provided at the bottom of the cabinet body 5, and the water outlet pipe 7 is connected to the water tank to discharge the coolant in the battery device; and the above-mentioned battery modules. There are several battery modules, and several battery modules are arranged at intervals up and down in the cabinet body 5 and are sequentially connected to the water outlet 105 and the water inlet 104 through the first pipeline 3, that is, the water outlet 105 of the upper layer is connected to the water inlet 104 of the lower layer, and then connected in sequence to connect multiple battery modules in series. The water inlet pipe 6 has at least one water outlet end connected to the water inlet 104 of the battery module at the top, 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 provided 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. A fire fighting pipe 14 can also be connected to the top of the cabinet body 5 to spray coolant in case of thermal runaway or fire in the cabinet.

[0049] Optionally, as Figure 10 shown, the water inlet pipe 6 has multiple water outlet ends arranged at intervals up and down, and each water outlet end is respectively connected to the water inlet 104 of one of the battery modules. At least one battery module is provided between adjacent two water outlet ends. Of course, multiple battery modules can also be provided. By setting multiple water outlet ends, the liquid injection speed of the battery modules can be increased. The water outlet 105 of the battery module arranged at the bottom and located between two water outlet ends is communicated with the cabinet body 5 to discharge the coolant into the cabinet body 5. Of course, the water outlet 105 of the battery module at the bottom in the cabinet body 5 is also communicated with the cabinet body 5, so that the liquid injection speed of the cabinet body 5 can be increased.

[0050] Optionally, as Figures 9-11As shown in the figure, the battery device further includes a power device 8, a first three-way valve 9, and a second three-way valve 10. The power device 8 and the first three-way valve 9 are arranged on the water inlet pipe 6. The first three-way valve 9 is used to control the on-off of the water inlet pipe 6. The second three-way valve 10 is arranged on the water outlet pipe 7. The second three-way valve 10 is used to control the on-off of the water outlet pipe 7. The first three-way valve 9 and the second three-way valve 10 are connected to each other for internal circulation within the cabinet 5. The power device 8 includes a water tank and a pump. The water tank plays a role in storing water and buffering. The power device 8 injects the coolant into the battery module within the cabinet 5 through the water inlet pipe 6. The first three-way valve 9 and the second three-way valve 10 being interconnected can make the cabinet 5 enter the internal circulation state, that is, closing the end of the first three-way valve 9 connected to the water inlet pipe 6 and closing the end of the second three-way valve 10 connected to the water outlet pipe 7. In the normal state, the internal circulation within the cabinet 5 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 10 to fill the entire battery device with coolant.

[0051] Optionally, as Figure 11 shown, there are multiple battery devices. The water inlet pipe 6 of at least one battery device is connected to the water supply pipe 11, and the water outlet pipe 7 of at least one battery device is connected to the drain pipe 12. For example, multiple battery devices can be connected in series or in parallel. When connected in series, the water inlet pipe 6 of the first battery device is connected to the water supply pipe 11 to supply water to the battery device, and the water outlet pipe 7 of the last battery device is connected to the drain pipe 12 to discharge the coolant. The remaining battery devices are connected through the water outlet pipe 7; when connected in parallel, the water inlet pipe 6 of each battery device is connected to the water supply pipe 11, and the water outlet pipe 7 of each battery device is connected to the drain pipe 12. Multiple battery devices can be connected in parallel through one water supply pipe 11 and one drain pipe 12, without the need to connect pipelines for each battery device individually.

[0052] During actual use, a temperature detection device can be arranged within the housing 1 to detect the temperature within the housing 1. When one or a few battery modules have a relatively high temperature, inject coolant to fill the battery modules where thermal runaway occurs. When more battery modules have thermal runaway, increase the injection volume and close the second three-way valve 10 to fill the entire battery device with coolant.

[0053] 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.

[0054] In addition, it should be noted that, for the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0055] 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 also be regarded as the content disclosed by the present disclosure.

Claims

1. A battery module, characterized in that: include: A shell body, on which a water inlet and a water outlet are provided; a first pipeline, the water inlet being connected to the first pipeline so that the coolant can enter the shell through the first pipeline; 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 battery module further includes a second pipeline connected to the water outlet.

3. The battery module according to claim 2, characterized in that: The water inlet and the water outlet are arranged at a height interval on the side of the shell along the height direction.

4. The battery module according to any one of claims 1 to 3, characterized in that: The water inlet and the water outlet are arranged on opposite sides of the shell, or the water inlet and the water outlet are arranged on the same side of the shell.

5. The battery module according to claim 4, characterized in that: A plurality of horizontally arranged guide plates are arranged in the shell, and the plurality of guide plates are arranged at intervals up and down and two adjacent guide plates are arranged in a staggered manner so that the coolant can flow in an S shape.

6. The battery module according to claim 5, characterized in that: The battery core includes a plurality of batteries, and a heat-conducting strip is arranged between two adjacent batteries to form a flow channel between the batteries.

7. The battery module according to claim 6, characterized in that: The length of the heat conductive strip is L1, the length of the battery is L2, and 1 / 2L2<L1<L2, and the plurality of heat conductive strips at the same height extend along the same end in the length direction of the battery to form the guide plate.

8. The battery module according to claim 7, characterized in that: The water inlet direction of the water inlet is the same as the length direction of the battery.

9. The battery module according to claim 1, characterized in that: The top of the shell is provided with an opening, and the bottom plate of the shell is provided with a plurality of drip holes for dripping the cooling liquid.

10. The battery module according to claim 1, characterized in that: One side of the shell is provided with an openable and closable cover so that the shell can be constructed as a closed cavity.

11. The battery module according to claim 10, characterized in that: The cover body is constructed as a heat exchange plate with a cooling disc inside so as to contact with the cooling liquid in the shell for heat exchange. A liquid inlet and a liquid outlet connected to the cooling disc are provided on the heat exchange plate.

12. 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 1-11, a plurality of the battery modules are provided, and the plurality of the battery modules are arranged in the cabinet at intervals up and down, and the water outlet is connected to the water inlet in sequence through the first pipeline, and the water inlet pipe has at least one water outlet end connected to the water inlet of the battery module located at the top, so that the coolant enters the battery module located at the top and flows into the battery modules below in sequence.

13. The battery device according to claim 12, characterized in that: The water inlet pipe has a plurality of water outlet ends spaced apart from each other in an upper and lower direction, each of the water outlet ends is respectively connected to the water inlet of one of the battery modules, at least one battery module is arranged between two adjacent water outlet ends, and the water outlet of the battery module located between the two water outlet ends and at the bottom is connected to the cabinet to discharge the coolant into the cabinet.

14. The battery device according to claim 12, 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.

15. The battery device according to claim 12, 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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