Immersed cooling battery module and battery pack

Abstract

The utility model provides an immersed cooling battery module and a battery pack. The immersed cooling battery module comprises a module shell, a fixed plate arranged in the module shell and a plurality of battery cells arranged on the fixed plate, the interior of the module shell is divided into a first cavity and a second cavity by the fixing plate, and a plurality of limiting grooves are formed in the two opposite side faces of the fixing plate. The battery cells are respectively arranged in the first cavity and the second cavity, the left side and the right side of the module shell are respectively provided with a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are communicated with the first cavity and the second cavity, and the liquid inlet and the liquid outlet are connected into a cooling liquid circulating pipeline. According to the immersed cooling battery module disclosed by the utility model, through the arrangement of the liquid inlet and the liquid outlet, the cooling liquid can circularly flow in the module shell and is in full contact with the side part of the battery core shell to generate heat exchange, so that the cooling effect on the battery core is improved, the working performance of the battery module is improved, and the performance of the whole vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to an immersion cooling battery module.

[0002] The utility model also relates to a battery pack provided with the above-mentioned immersion cooling battery module. Background Art

[0003] With the development of electric vehicles, the thermal safety of electric vehicle power batteries has become one of the important performance indicators of electric vehicles. In power batteries, the battery module is equipped with multiple cells arranged in a certain arrangement. When the power battery is working, since each cell is arranged in a relatively small module shell, heat will accumulate and cause the temperature in the battery module to exceed its normal working temperature. If the heat cannot be dissipated in time, it will cause the battery performance to decay faster, reduce the service life and even cause the battery to catch fire. Therefore, it is particularly important to cool and dissipate the heat of the cells in the battery module.

[0004] At present, the cooling methods commonly used for battery modules of battery packs include: passive air cooling, active air cooling, and active cooling with liquid cooling plates. Among them, passive air cooling only relies on the flow of air to carry away the heat generated by the battery cells. Its cooling effect is poor, the cooling efficiency is low, and it is difficult to ensure the sealing of the battery pack. When using active cooling with a liquid cooling plate, it is usually difficult to completely fit each battery cell with the liquid cooling plate. Especially when the battery cell is a cylindrical battery cell, the contact area between the battery cell and the liquid cooling plate is small, and there is still a problem of poor cooling effect on the battery cell, which leads to a decrease in the working performance of the battery module and difficulty in improving the performance of the entire vehicle. Utility Model Content

[0005] In view of this, the utility model aims to propose an immersion cooling battery module to improve the cooling effect of each battery cell, thereby improving the working performance of the battery module and enhancing the performance of the entire vehicle.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] An immersion cooling battery module comprises a module shell, a fixing plate arranged in the module shell, and a plurality of battery cells arranged on the fixing plate; the fixing plate divides the interior of the module shell into a first cavity and a second cavity, and a plurality of limiting grooves are arranged on two opposite sides of the fixing plate; each of the battery cells is arranged in the first cavity and the second cavity, and the bottom of the battery cell can be fixed in the limiting groove; a liquid inlet and a liquid outlet are respectively arranged on the left and right sides of the module shell, the liquid inlet and the liquid outlet are both connected to the first cavity and the second cavity, and the liquid inlet and the liquid outlet are connected to a cooling liquid circulation pipeline.

[0008] Further, in the height direction of the module housing, the liquid outlet is located above each of the battery cells.

[0009] Further, the limiting grooves are arranged in a dot matrix row and column pattern on the fixing plate, and the limiting grooves in adjacent two rows or adjacent two columns are staggered.

[0010] Further, in the transverse direction, the number of the limiting grooves in any row does not exceed 10.

[0011] Further, the two poles of the battery cell are respectively located at the top of the battery cell and on the battery cell housing;

[0012] A bus bar is provided between adjacent two columns of the battery cells; the bus bar is connected in parallel with each of the battery cells in the same column, and the bus bar is connected in series with each of the battery cells in adjacent two columns.

[0013] Further, two connection terminals are provided at the top of the module housing; one pair of the connection terminals passes through the top of the module housing and extends into the first cavity, and is connected to each of the battery cells in the first cavity; the other pair of the connection terminals passes through the top of the module housing and extends into the second cavity, and is connected to each of the battery cells in the second cavity.

[0014] Further, the module housing includes a frame body, and two cover plates hermetically connected to the front and rear ends of the frame body; a fixing plate is provided in the frame body, and the fixing plate is arranged parallel to the two cover plates; the liquid outlet and the liquid inlet are respectively arranged on the left and right side walls of the frame body.

[0015] Further, mounting feet are provided on the left and right side walls of the frame body, and the immersion cooling battery module is connected to the battery pack housing through the mounting feet; the mounting feet are close to the bottom of the frame body, and both the liquid outlet and the liquid inlet are located above the mounting feet.

[0016] Compared with the prior art, the present utility model has the following advantages:

[0017] For the immersion cooling battery module of the present utility model, through the arrangement of the liquid inlet and the liquid outlet, the coolant in the coolant circulation pipeline can circulate in the first cavity and the second cavity in the module housing, and fully contact with the side part of the battery cell housing to perform heat exchange. Compared with the prior art, it has a larger heat exchange area, and makes the temperature between each battery cell uniform, so as to improve the cooling effect on the battery cell, thereby improving the working performance of the battery module and enhancing the performance of the whole vehicle.

[0018] In addition, the liquid outlet is located above each battery cell, enabling the coolant to completely submerge each battery cell, thereby ensuring the cooling effect of the coolant on each battery cell. The limiting grooves are arranged in rows and columns on the fixing plate, which can make each battery cell arranged closely, thus increasing the loading capacity of the battery cells and enhancing the capacitance of the immersion-cooled battery module. Horizontally, the number of limiting grooves in any row does not exceed 10, which can prevent the temperature of the coolant from being too high, ensure the uniformity of the temperature of each battery cell, and improve the cooling effect on each battery cell.

[0019] In addition, the two poles of the battery cell are respectively located at the top of the battery cell and on the battery cell housing. The busbars connect the battery cells in the same column in parallel, and the busbars connect the battery cells in two adjacent columns in series, so as to facilitate the connection of the battery cells inside the immersion-cooled battery module, and thus facilitate the assembly of the immersion-cooled battery module. Two connection terminals are provided at the top of the module housing, and each pair of connection terminals is respectively connected to the battery cells in the first cavity and the second cavity, ensuring the stable connection between each battery cell and the electrical equipment outside the immersion-cooled battery module.

[0020] Furthermore, the module housing includes a frame body and a cover plate. Through the combined setting of the frame body and the cover plate, after installing components such as the battery cells and the busbars in the frame body, the cover plate is buckled on the frame body to achieve the sealing of the module housing, thus facilitating the assembly operation of the immersion-cooled battery module. Mounting feet are provided on the left and right side walls of the frame body to improve the fixing effect and stability of the immersion-cooled battery module in the battery pack.

[0021] Another object of the present invention is to provide a battery pack, which includes a battery pack housing and the immersion-cooled battery module provided in the battery pack housing.

[0022] Further, the immersion-cooled battery modules are configured to be multiple arranged in sequence along the length direction of the battery pack housing; an inlet liquid main pipe and an outlet liquid main pipe are provided in the battery pack housing, and the inlet liquid ports and the outlet liquid ports of each immersion-cooled battery module are respectively connected to the coolant circulation pipeline outside the battery pack through the inlet liquid main pipe and the outlet liquid main pipe.

[0023] The battery pack and / or the battery pack module of the present invention BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 is the overall structural schematic diagram of the immersion-cooled battery module according to Embodiment 1 of the present invention;

[0026] Figure 2 Structural schematic diagram of the fixing plate and the frame according to the first embodiment of the present utility model;

[0027] Figure 3 Internal structural schematic diagram of the immersion cooling battery module according to the first embodiment of the present utility model;

[0028] Figure 4 Internal structural schematic diagram of the immersion cooling battery module from another perspective according to the first embodiment of the present utility model;

[0029] Figure 5 Of the present utility model Figure 4 Enlarged view of the position shown as a in

[0030] Figure 6 Overall structural schematic diagram of the battery according to the second embodiment of the present utility model;

[0031] Figure 7 Explosion diagram of the battery according to the second embodiment of the present utility model;

[0032] Explanation of reference numerals:

[0033] 1, module housing; 1a, first cavity; 1b, second cavity;

[0034] 101, frame; 102, cover plate; 103, mounting foot;

[0035] 2, fixing plate; 201, limiting groove;

[0036] 3, battery cell; 4, liquid inlet; 5, liquid outlet;

[0037] 6, bus bar; 601, first connection part; 602, second connection part;

[0038] 7, terminal; 8, sampling terminal;

[0039] 9, battery pack housing; 901, upper housing; 902, lower housing;

[0040] 10, liquid inlet main pipe; 11, liquid outlet main pipe; 12, battery energy distribution unit. Detailed implementation manners

[0041] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0042] In the following description, specific details such as specific system architectures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0043] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationships such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and should not be construed as indicating or implying relative importance.

[0044] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0045] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0046] Embodiment 1

[0047] This embodiment relates to an immersion-cooled battery module. In terms of the overall structure, as Figure 1 、 Figure 2 and Figure 3 shown, the immersion-cooled battery module includes a module housing 1, a fixing plate 2, and a plurality of battery cells 3.

[0048] Among them, the fixing plate 2 is arranged inside the module housing 1, and the fixing plate 2 divides the interior of the module housing 1 into a first cavity 1a and a second cavity 1b. A plurality of limiting grooves 201 are provided on both opposite side surfaces of the fixing plate 2. Each battery cell 3 is separately arranged in the first cavity 1a and the second cavity 1b, and the bottom of the battery cell 3 can be inserted into the limiting groove 201. Liquid inlets 4 and liquid outlets 5 are respectively arranged on the left and right sides of the module housing 1. The liquid inlets 4 and the liquid outlets 5 are both communicated with the first cavity 1a and the second cavity 1b, and the liquid inlets 4 and the liquid outlets 5 are connected to a coolant circulation pipeline.

[0049] As described above, by setting the liquid inlet 4 and the liquid outlet 5, the coolant in the coolant circulation pipeline can circulate in the first cavity 1a and the second cavity 1b in the module shell 1, and fully contact with the side of the battery cell 3 shell to exchange heat. Compared with the prior art, it has a larger heat exchange area and makes the temperature between each battery cell 3 uniform, so as to improve the cooling effect of the battery cell 3, thereby improving the working performance of the battery module and enhancing the performance of the entire vehicle.

[0050] Based on the above overall introduction, specifically, the battery cells 3 of this embodiment are arranged on both sides of the fixed plate 2, which increases the loading capacity of the battery cells 3 of a single immersion cooling battery module to increase the capacity of the immersion cooling battery module. In the specific implementation, the bottom of the battery cell 3 of this embodiment is connected to the limit groove 201 of the fixed plate 2 by bonding to ensure the stability of the connection between the battery cell 3 and the fixed plate 2. In addition, the coolant circulation pipeline of this embodiment is arranged on the vehicle loaded with the immersion cooling battery module, and the coolant circulation pipeline is connected to the cooling system of the vehicle.

[0051] In addition, in order to prevent leakage of each battery cell 3 immersed in the coolant, the coolant of this embodiment can adopt a conventional insulating coolant well known to those skilled in the art, such as mineral oil, fluorinated liquid, etc., which can have good insulation properties and can exchange heat with each battery cell 3 to take away the heat generated by the battery cell 3.

[0052] In addition, in this embodiment, since the liquid inlet 4 and the liquid outlet 5 are arranged on both sides of the battery module, the coolant mainly flows horizontally through the gaps between the rows of the battery cells 3. At the same time, since the coolant will heat up due to the heating of the battery cells 3, the coolant will also flow along the gaps between the columns of the battery cells 3. Therefore, the battery cells 3 of this embodiment can preferably adopt cylindrical battery cells 3, so that when the coolant flows through the battery cells 3 from any direction, the heat exchange area between the battery cells 3 and the coolant remains basically consistent, so as to ensure that when the coolant in the first cavity 1a and the second cavity 1b generates heat convection in different directions due to the heat generated by the battery cells 3, the cooling effect on the battery cells 3 is not affected by the flow direction of the coolant, thereby ensuring the uniformity of the cooling of the battery cells 3.

[0053] In order to ensure the cooling effect of each battery cell 3, Figure 4As shown, in this embodiment, in the height direction of the module housing 1, the liquid outlet 5 is located above each of the battery cells 3. It can be understood that setting the liquid outlet 5 above each battery cell 3 enables the coolant in the module housing 1 to completely submerge each battery cell 3 before the coolant can flow back to the coolant circulation pipeline through the liquid outlet 5, so that each battery cell 3 can be in full contact with the coolant to ensure the cooling effect of the coolant on each battery cell 3. At the same time, when the coolant in the module housing 1 is heated due to the heat generated by the battery cells 3, the hotter coolant moves upward due to its reduced density. Setting the liquid outlet 5 above each battery cell 3 can, to a certain extent, facilitate the rapid discharge of the heated coolant, accelerate the circulation speed of the coolant, and further improve the cooling effect on the battery cells 3.

[0054] In specific implementation, the liquid inlet 4 of this embodiment is located below the liquid outlet 5, and the liquid inlet 4 is arranged near the bottom of the module housing 1. Specifically, the distance A between the liquid inlet 4 and the bottom of the module housing 1 and the height H of the module housing 1 satisfy: A ≤ 0.4H. When the coolant enters the first cavity 1a and the second cavity 1b through the liquid inlet 4, the coolant can flow towards the bottom of the module housing 1 by gravity, so that each battery cell 3 near the bottom is submerged to ensure the cooling effect on each battery cell 3.

[0055] In order to increase the loading capacity of the battery cells 3 and thus improve the capacitance of the immersion-cooled battery module, the limiting grooves 201 of this embodiment are arranged in a dot matrix row and column pattern on the fixing plate 2, and the limiting grooves 201 in adjacent rows are staggered. With this arrangement, the cylindrical battery cells 3 can be arranged in the most compact manner, thereby increasing the loading capacity of the battery cells 3 and improving the capacitance of the immersion-cooled battery module. At the same time, arranging the battery cells 3 in this way makes the gaps between the battery cells 3 smaller. While ensuring the circulation of the coolant between the battery cells 3, it can reduce the volume of the coolant in the immersion-cooled battery module, thereby increasing the circulation speed of the coolant and reducing the overall weight of the immersion-cooled battery module.

[0056] In order to improve the cooling effect on the battery cells 3, in the horizontal direction, the number of limiting grooves 201 in any row does not exceed 10, so that the number of battery cells 3 in any row does not exceed 10. It can be understood that the liquid inlet 4 and the liquid outlet 5 are respectively arranged on both sides of the module housing 1, and the coolant mainly flows horizontally through the gaps between the rows of the battery cells 3. During the process of the coolant flowing from the liquid inlet 4 to the liquid outlet 5, the coolant passes through each battery cell 3 in turn and is gradually heated during the flow towards the liquid outlet 5. If the number of limiting grooves 201 in the horizontal direction, that is, the number of battery cells 3, is too large, the temperature of the coolant is too high, making it difficult to effectively cool each battery cell 3 on the side where the liquid outlet 5 is located, resulting in uneven temperatures of the battery cells 3 and a decrease in the cooling effect on the battery cells 3.

[0057] Therefore, the number of the limiting slots 201 of any row is not more than 10, which can avoid the overhigh temperature of the coolant, ensure the temperature uniformity of each battery cell 3, and improve the cooling effect on each battery cell 3. In this embodiment, the number of the limiting slots 201 of any row is set to 7. Of course, for the battery cells 3 in the immersion cooling battery module of this embodiment, the fewer the number of the battery cells 3 in the transverse direction, the better the cooling effect of the coolant on each battery cell 3.

[0058] Since the bottom ends of the battery cells 3 are inserted into the limiting slots 201 of the fixing plate 2, in order to facilitate the connection of each battery cell 3, as Figure 4 shown, the two poles of the battery cell 3 of this embodiment are respectively located at the top of the battery cell 3 and on the battery cell 3 housing. Specifically, the top of the battery cell 3 is the positive pole, and the battery cell 3 housing is the negative pole. A bus bar 6 is arranged between two adjacent columns of the battery cells 3. The bus bar 6 is connected in parallel with the battery cells 3 in the same column, and the bus bar 6 is connected in series with the battery cells 3 in two adjacent columns. That is, in the transverse direction, the bus bar 6 connects the positive poles and negative poles of two adjacent columns of the battery cells 3, and in the longitudinal direction, the bus bar 6 connects the positive poles or negative poles of the battery cells 3 in the same column to connect the battery cells 3 in the same column in parallel. With such a setting, by arranging the bus bar 6 on the top of each battery cell 3, each battery cell 3 can be connected in series and parallel, so as to facilitate the connection of each battery cell 3 inside the immersion cooling battery module, and thus facilitate the assembly of the immersion cooling battery module. In specific implementation, as Figure 5 shown, the bus bar 6 is connected to the top and the housing of the battery cell 3 by spot welding, and a first connecting portion 601 for connecting the top end of the battery cell 3 and an arc-shaped second connecting portion 602 for connecting the housing of the battery cell 3 are formed on the bus bar 6.

[0059] In this embodiment, two connection terminals 7 are arranged on the top of the module housing 1. Among them, one pair of connection terminals 7 passes through the top of the module housing 1 and extends to the first cavity 1a, and is communicated with each battery cell 3 in the first cavity 1a. The other pair of connection terminals 7 passes through the top of the module housing 1 and extends to the second cavity 1b, and is communicated with each battery cell 3 in the second cavity 1b. With such a setting, it is ensured that each battery cell 3 is stably connected to the electrical equipment outside the immersion cooling battery module. In specific implementation, the connection terminal 7 can be connected to the corresponding battery cell 3 through a wire. At the same time, two sampling terminals 8 are also arranged on the top of the module housing 1, and the two sampling terminals 8 are respectively connected to the sampling assemblies in the first cavity 1a and the second cavity 1b, and are used for monitoring the working states of each battery cell 3.

[0060] To facilitate the assembly of the battery module, the module housing 1 of this embodiment includes a frame body 101 and two cover plates 102 hermetically connected to the front and rear ends of the frame body 101. A fixing plate 2 is provided inside the frame body 101, and the fixing plate 2 is arranged parallel to the two cover plates 102. The liquid outlet 5 and the liquid inlet 4 are respectively arranged on the left and right side walls of the frame body 101. Through the combined setting of the frame body 101 and the cover plates 102, after components such as the battery cells 3 and the bus bars 6 are installed in the frame body 101, the cover plates 102 are buckled on the frame body 101 to achieve the sealing of the module housing 1, thus facilitating the assembly operation of the immersion-cooled battery module and being conducive to the maintenance work of the immersion-cooled battery module.

[0061] Since the immersion-cooled battery modules are usually configured to be multiple in the battery pack, in order to improve the fixing stability of the immersion-cooled battery modules in the battery pack, mounting feet 103 are provided on the left and right side walls of the frame body 101 of this embodiment, and the immersion-cooled battery module is connected to the battery pack housing 9 through the mounting feet 103. The mounting feet 103 are close to the bottom of the frame body 101, and both the liquid outlet 5 and the liquid inlet 4 are located above the mounting feet 103. In specific implementation, through holes are provided in the safety feet of this embodiment, and the connecting piece can pass through these through holes to fix the immersion-cooled battery module on the battery pack housing 9, so as to improve the fixing effect and stability of the immersion-cooled battery module in the battery pack.

[0062] In summary, for the immersion-cooled battery module of this embodiment, through the setting of the liquid inlet 4 and the liquid outlet 5, the coolant in the coolant circulation pipeline can circulate in the first cavity 1a and the second cavity 1b in the module housing 1, and fully contact the side part of the battery cell 3 housing to conduct heat exchange. Compared with the prior art, it has a larger heat exchange area, and makes the temperatures of the battery cells 3 uniform, so as to improve the cooling effect on the battery cells 3, thereby improving the working performance of the battery module and enhancing the vehicle performance.

[0063] Embodiment Two

[0064] This embodiment relates to a battery pack, as Figure 6 , Figure 7 shown. In terms of the overall structure, the battery pack includes a battery pack housing 9 and the immersion-cooled battery module as described in Embodiment One provided inside the battery pack housing 9.

[0065] Specifically, in this embodiment, in order to facilitate the connection between the immersion-cooled battery module and the coolant circulation pipeline, the immersion-cooled battery modules in this embodiment are configured to be arranged in sequence along the length direction of the battery pack housing 9, such that the liquid inlet 4 and the liquid outlet 5 of each immersion-cooled battery module are both located on the same side. Meanwhile, a liquid inlet main pipe 10 and a liquid outlet main pipe 11 are provided inside the battery pack housing 9. The liquid inlet 4 and the liquid outlet 5 of each immersion-cooled battery module are respectively connected to the coolant circulation pipeline outside the battery pack through the liquid inlet main pipe 10 and the liquid outlet main pipe 11. By connecting the liquid inlet main pipe 10 to the liquid inlet 4 of each immersion-cooled battery module and connecting the liquid outlet main pipe 11 to the liquid outlet 5 of each immersion-cooled battery module, it is convenient to connect each immersion-cooled battery module to the coolant circulation pipeline, thereby connecting each immersion-cooled battery module to the coolant circulation pipeline.

[0066] In specific implementation, the battery pack housing 9 of this embodiment includes an upper housing 901 and a lower housing 902 to facilitate the installation of the immersion-cooled battery module or other components into the battery pack. The mounting feet 103 of the immersion-cooled battery module are fixed to the lower housing 902. Meanwhile, a battery energy distribution unit 12 (BDU) is also provided inside the battery pack and is connected to the sampling terminals 8 of each immersion-cooled battery module.

[0067] Through the setting of the immersion-cooled battery module, the battery pack of this embodiment can improve the cooling effect on the immersion-cooled battery module in the battery pack, thereby facilitating the improvement of the working performance of the battery pack, and further improving the practical performance of the vehicle equipped with this battery pack.

[0068] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An immersion cooling battery module, characterized in that: It includes a module shell, a fixing plate arranged in the module shell, and a plurality of battery cells arranged on the fixing plate; The fixing plate divides the interior of the module housing into a first cavity and a second cavity, and a plurality of limiting grooves are provided on two opposite sides of the fixing plate; Each of the battery cells is disposed in the first cavity and the second cavity, and the bottom of the battery cell can be fixed in the limiting groove; The left and right sides of the module shell are respectively provided with a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are both connected to the first cavity and the second cavity, and the liquid inlet and the liquid outlet are connected to the coolant circulation pipeline.

2. The immersion cooling battery module according to claim 1, characterized in that: In the height direction of the module shell, the liquid outlet is located above each of the battery cells.

3. The immersion cooling battery module according to claim 1, characterized in that: The limiting grooves are arranged in rows and columns in a dot matrix on the fixing plate, and the limiting grooves in two adjacent rows or two adjacent columns are arranged in a staggered manner.

4. The immersion cooling battery module according to claim 3, characterized in that: In the horizontal direction, the number of the limiting grooves in any row does not exceed 10.

5. The immersion cooling battery module according to claim 3, characterized in that: The two poles of the battery cell are respectively located on the top of the battery cell and the battery cell shell; A busbar is provided between two adjacent columns of the battery cells; the busbar is connected in parallel to the battery cells in the same column, and the busbar is connected in series to the battery cells in two adjacent columns.

6. The immersion cooling battery module according to claim 1, characterized in that: Two pairs of connection terminals are provided on the top of the module housing; A pair of the connection terminals pass through the top of the module housing and extend into the first cavity, and are connected to each of the battery cells in the first cavity; Another pair of the connection terminals passes through the top of the module shell and extends into the second cavity, and is connected to each of the battery cells in the second cavity.

7. The immersion cooling battery module according to any one of claims 1 to 6, characterized in that: The module housing comprises a frame body and two cover plates sealedly connected to the front and rear ends of the frame body; The fixing plate is arranged in the frame, and the fixing plate is arranged parallel to the two cover plates.

8. The immersion cooling battery module according to claim 7, characterized in that: The left and right side walls of the frame are both provided with mounting feet, and the immersion cooling battery module is connected to the battery pack shell through the mounting feet; The mounting foot is close to the bottom of the frame, and the liquid outlet and the liquid inlet are both located above the mounting foot.

9. A battery pack, characterized in that: It comprises a battery pack shell, and an immersion-cooled battery module according to any one of claims 1 to 8 arranged in the battery pack shell.

10. The battery pack according to claim 9, characterized in that: The immersion cooling battery module is configured as a plurality of modules sequentially arranged along the length direction of the battery pack shell; A liquid inlet manifold and a liquid outlet manifold are provided in the battery pack shell, and the liquid inlet and the liquid outlet of each immersion cooling battery module are connected to the coolant circulation pipeline outside the battery pack through the liquid inlet manifold and the liquid outlet manifold respectively.

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