Battery module

Abstract

The application relates to the technical field of batteries, in particular to a battery module, which comprises a plurality of battery cell modules and inter-module liquid cooling plates; wherein the plurality of battery cell modules are arranged along one or more of the X direction, the Y direction and the Z direction to form a spatial array structure, and an inter-module liquid cooling plate is arranged between any two adjacent battery cell modules; any battery cell module comprises at least one battery cell group, and when the number of battery cell groups is multiple, the multiple battery cell groups are arranged along one of the X direction, the Y direction and the Z direction. It can be seen that the application designs a battery cell module with multiple rows, multiple columns and / or multiple layers, so that more battery cells can be arranged in limited space, the electric quantity is greatly improved, one inter-module liquid cooling plate is shared between two adjacent battery modules, the lightweight design is facilitated while cooling is achieved, and the space and parts are saved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery module. Background Technology

[0002] With the development of unmanned aerial vehicles, in order to increase the driving range, how to increase the power capacity within a limited space has become an important task of battery design. However, the existing soft-pack cell assembly scheme usually follows the design concept of electric vehicles, adopting a single row + single layer arrangement scheme. The cooling method is usually to cool the sides or large surface of the cell, which results in low volume utilization, many types of materials, and high weight. Utility Model Content

[0003] The purpose of this application is to provide a battery module that, to a certain extent, solves the technical problems of existing soft-pack cell assembly schemes, which usually follow the design concept of electric vehicles and adopt a single row + single layer arrangement. The cooling method is usually cooling the sides or large surface of the cells, which results in low volume utilization, many types of materials, and high weight.

[0004] This application provides a battery module, including: a cell module and an inter-module liquid cooling plate; wherein, the number of cell modules is multiple, and they are arranged along one or more of the X, Y and Z directions to form a spatial array structure, and the inter-module liquid cooling plate is disposed between at least some of the adjacent cell modules; each cell module includes at least one cell group, and when the number of cell groups is multiple, the multiple cell groups are arranged along one of the X, Y and Z directions.

[0005] In the above technical solution, the inter-module liquid cooling plate is further connected to the adjacent battery cell module through thermally conductive structural adhesive.

[0006] In any of the above technical solutions, further, along the arrangement direction of two adjacent battery cell modules, the projection of the inter-module liquid cooling plate between the two modules completely covers the projection of the adjacent battery cell module.

[0007] In any of the above technical solutions, the edge of the inter-module liquid cooling plate is provided with an overflow blocking part.

[0008] In any of the above technical solutions, the battery module further includes an inter-cell liquid cooling plate, and the inter-cell liquid cooling plate is provided between any two adjacent cell groups in each cell module.

[0009] In any of the above technical solutions, the inter-cell liquid cooling plate is further connected to the adjacent cell assembly via thermally conductive structural adhesive.

[0010] In any of the above technical solutions, further, along the arrangement direction of two adjacent battery cell groups, the projection of the inter-cell liquid cooling plate between the two completely covers the projection of the adjacent battery cell group.

[0011] In any of the above technical solutions, the inter-module liquid cooling plate is further connected to the inter-cell liquid cooling plate in the adjacent cell module through a connecting component.

[0012] In any of the above technical solutions, the liquid cooling plate between the battery cells is further made of low-density aluminum-magnesium alloy.

[0013] In any of the above technical solutions, the cell module further includes end plates and side plates; wherein, along a direction perpendicular to the arrangement direction of the multiple cell groups, the end plates are provided at both ends of the assembly formed by the multiple cell groups; along the arrangement direction of the multiple cell groups, the side plates are provided on both sides of the assembly formed by the multiple cell groups, and the two ends of any side plate are connected to the two end plates; the inter-module liquid cooling plate is connected to the side plates and / or end plates of the adjacent cell module.

[0014] In any of the above technical solutions, further, in a direction perpendicular to the arrangement direction of the multiple battery cell groups, the projection of the assembly formed by the multiple battery cell groups falls completely into the projection of the end plate.

[0015] In any of the above technical solutions, the side plate is further U-shaped.

[0016] In any of the above technical solutions, the end plates of two adjacent battery cell modules are further connected.

[0017] In any of the above technical solutions, one of the end plates of two adjacent battery cell modules is provided with a guide post, and the other is provided with a guide hole, and the guide post and the guide hole cooperate with each other.

[0018] In any of the above technical solutions, the battery module further includes a total positive output terminal and a total negative output terminal, and the total positive output terminal and the total negative output terminal are disposed on opposite sides of one of the outermost end plates.

[0019] In any of the above technical solutions, each cell in each cell module has a tab formed on one side, and all the tabs in the same cell module have the same orientation; all the cells in each cell module are jointly provided with a tab support plate, and the tab support plate is connected to the end plate and / or the side plate.

[0020] In any of the above technical solutions, the battery module further includes a connecting bar, and two adjacent cell groups in two adjacent cell modules are electrically connected through the connecting bar. The connecting bar is disposed on the side of the end plate away from the cell, and the end plate has a clearance through hole corresponding to the connecting bar.

[0021] In any of the above technical solutions, the thickness direction of the battery cell is the same as the X direction, the length direction of the battery cell is the same as the Y direction, and the height direction of the battery cell is the same as the Z direction.

[0022] In any of the above technical solutions, the battery cell assembly further includes a battery cell, a heat insulation layer, and a buffer layer; wherein each battery cell assembly includes multiple battery cells, and the multiple battery cells are arranged sequentially along the thickness direction of the battery cells to form a row of battery cells, and the thickness direction of the battery cells is the same as the direction perpendicular to the arrangement direction of the multiple battery cell assemblies; the heat insulation layer and the buffer layer are interposed between the multiple battery cells.

[0023] In any of the above technical solutions, further, in each of the battery cell groups, along the arrangement direction of the plurality of battery cells, each pair of adjacent battery cells is a group, and the heat insulation layer is provided between the two battery cells in a group, and the buffer layer is provided between two adjacent groups of battery cells; along the arrangement direction of the plurality of battery cells, the buffer layer is provided on the outside of the first battery cell in the first group, and the buffer layer is provided on the outside of the last battery cell in the last group.

[0024] In any of the above technical solutions, further, along the arrangement direction of the plurality of battery cells, the distance between any two adjacent battery cells is 0.5-3mm.

[0025] In any of the above technical solutions, the heat insulation layer is further made of a felt material that is resistant to temperatures of 200-800℃.

[0026] In any of the above technical solutions, the thickness of the heat insulation layer is further 0.8-5mm.

[0027] In any of the above technical solutions, the buffer layer is further made of polyurethane polymer material.

[0028] In any of the above technical solutions, the thickness of the buffer layer is further 0.8-5mm.

[0029] In any of the above technical solutions, the thickness of the battery cell is T, and 4mm≤T≤25mm.

[0030] In any of the above technical solutions, the height of the battery cell is H, and 80mm≤H≤250mm.

[0031] In any of the above technical solutions, the length of the battery cell is W, and 80mm≤W≤150mm.

[0032] In any of the above technical solutions, further, along the arrangement direction of the plurality of cells in each of the cell groups, the length of each cell group is 50-800mm.

[0033] In any of the above technical solutions, the liquid cooling plate between modules is further made of low-density aluminum-magnesium alloy.

[0034] Compared with the prior art, the beneficial effects of this application are as follows: This application proposes a novel battery module in which cell modules are arranged in one or more of the X, Y, and Z directions to form a spatial array structure, i.e., forming multiple rows, columns, and / or layers of cell modules. This allows for the arrangement of more cells within a limited space, greatly increasing the capacity. Furthermore, adjacent battery modules share a single inter-module liquid cooling plate, which not only provides cooling but also contributes to lightweight design, while saving space and components. By reducing the number of liquid cooling plates, the number of pipes and connection points is correspondingly reduced, further improving the safety and reliability of the single-cell module. Attached Figure Description To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 An exploded view of the battery module provided in the embodiments of this application; Figure 2 An assembly diagram of the battery module provided in the embodiments of this application; Figure 3 This is another assembly diagram of the battery module provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the battery cell module provided in the embodiments of this application; Figure 5 A partial structural schematic diagram of the battery cell module provided in an embodiment of this application; Figure 6 This is a schematic diagram of the battery cell structure provided in an embodiment of this application.

[0036] Figure label: 1-Battery cell module, 11-Battery cell group, 111-Battery cell, 1111-Taper, 112-Insulation layer, 113-Buffer layer, 12-End plate, 121-Guide post, 13-Side plate, 14-Liquid cooling plate between cells, 2-Liquid cooling plate between modules, 3-Thermal conductive structural adhesive, 4-Total positive output pole, 5-Total negative output pole, 6-Taper support plate, 7-Connecting bar, 8-Protective cover, 9-Adapter component. Detailed Implementation

[0037] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0038] The components of the embodiments of this application described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0039] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] The following reference Figures 1 to 6 This application describes a battery module according to some embodiments.

[0043] See Figures 1 to 5As shown, an embodiment of this application provides a battery module, including: a cell module 1 and an inter-module liquid cooling plate 2; wherein, there are multiple cell modules 1, and they are arranged along one or more of the X, Y and Z directions to form a spatial array structure, and an inter-module liquid cooling plate 2 is provided between at least some of two adjacent cell modules 1; each cell module 1 includes at least one cell group 11, and when there are multiple cell groups 11, the multiple cell groups 11 are arranged along one of the X, Y and Z directions.

[0044] As can be seen from the structure described above, this application proposes a novel battery module in which the cell modules 1 are arranged in one or more of the X, Y, and Z directions to form a spatial array structure, that is, to form multiple rows, columns, and / or layers of cell modules 1, thereby arranging more cells 111 in a limited space, which greatly improves the power capacity. Moreover, a single inter-module liquid cooling plate 2 is shared between two adjacent battery modules, which not only provides cooling but also contributes to lightweight design, while also saving space and components. Due to the reduction in the number of liquid cooling plates, the number of pipes and connection points is correspondingly reduced, further improving the safety and reliability of the single-cell module.

[0045] Furthermore, preferably, there are two battery cell modules 1, which are stacked together along the Z direction to form an upper and lower layer structure, and each battery cell module 1 contains two battery cell groups 11, which are arranged sequentially along the Y direction, and multiple battery cells 111 in each battery cell group 11 are arranged sequentially along the X direction.

[0046] It should be noted that the number of battery cell modules 1 is not limited to two, but can be more than two, depending on the actual needs; the number of battery cell groups 11 in each battery cell module 1 is also not limited to two, but can be less than two or more than two, depending on the actual needs.

[0047] In addition, it should be noted that the stacking direction of the battery cell module 1 is not limited to stacking along the Z direction alone, but can also be stacked along other directions. That is to say, multiple battery cell modules 1 can be stacked along the X and Y directions to form a cuboid structure, or multiple battery cell modules 1 can be stacked along the X and Z directions to form a cuboid structure, or multiple battery cell modules 1 can be stacked along the X, Y and Z directions to form a cuboid structure. Based on this, examples can be given: Example 1: When there are eight battery cell modules 1, the eight battery cell modules 1 can be stacked simultaneously along the X, Y, and Z directions to form a cuboid structure. The upper layer has four battery cell modules 1, which are arranged in a row along the X and Y directions, and the lower layer has four battery cell modules 1, which are also arranged in a row along the X and Y directions. Example 2: When there are four battery cell modules 1, the four battery cell modules 1 can be stacked along the X and Z directions to form a cuboid structure, or the four battery cell modules 1 can be stacked along the Y and Z directions to form a cuboid structure, or the battery cell modules 1 can be stacked along the Y and Z directions to form a cuboid structure. Example 3: When there are two battery cell modules 1, the two battery cell modules 1 can also be stacked along the X or Y direction to form a cuboid structure.

[0048] In addition, it should be noted that the arrangement of the battery cells 11 in each battery cell module 1 is not limited to the arrangement along the Y direction, but can also be arranged in a single column along the X or Z direction, depending on the actual needs.

[0049] In addition, the multiple cells 111 of each cell group 11 can also be arranged along the Y direction or the Z direction.

[0050] In this embodiment, preferably, as follows: Figures 1 to 3 As shown, the inter-module liquid cooling plate 2 is connected to the adjacent cell module 1 through thermally conductive structural adhesive 3. This not only strengthens the connection between the inter-module liquid cooling plate 2 and the cell module 1, but also conducts heat to accelerate the cooling of the cell 111. Moreover, the adhesive application is simple and convenient. In this embodiment, preferably, as follows: Figures 1 to 3 As shown, along the arrangement direction of two adjacent cell modules 1, the projection of the inter-module liquid cooling plate 2 completely covers the projection of the adjacent cell module 1. This ensures that the inter-module liquid cooling plate 2 can provide uniform heat dissipation to the corresponding cell module 1 from all directions. Of course, this is not the only option; it can be designed according to actual needs. In this embodiment, preferably, the edge of the inter-module liquid cooling plate 2 is provided with an overflow blocking part (not shown in the figure). This overflow blocking part can effectively prevent glue from overflowing, thereby ensuring the strength and thermal conductivity of the bonding part, and since the glue will not overflow, it will not affect other components.

[0051] Furthermore, preferably, the overflow blocking part is a high-density foam material formed on the edge of the inter-module liquid cooling plate 2.

[0052] Furthermore, preferably, the edges of the inter-module liquid cooling plate 2 at both ends along its length direction are provided with glue overflow blocking parts. Of course, it is not limited to this. Glue overflow blocking parts can also be provided on the edges of the inter-module liquid cooling plate 2 in other directions, depending on the actual needs. In this embodiment, preferably, as follows: Figure 4 As shown, the battery module also includes a liquid cooling plate 14 between cells, and a liquid cooling plate 14 between any two adjacent cell groups 11 in each cell module 1 is provided.

[0053] As can be seen from the structure described above, a liquid cooling plate 14 is also provided between two adjacent battery cell groups 11 inside the battery cell module 1, which plays a role in heat dissipation inside the battery cell module 1, improves the heat dissipation effect, and ensures the normal operation of the battery cell 111. In this embodiment, preferably, as follows: Figure 4 As shown, the inter-cell liquid cooling plate 14 is connected to the adjacent cell group 11 by thermally conductive structural adhesive 3, which not only strengthens the connection between the inter-module liquid cooling plate 2 and the cell module 1, but also conducts heat to accelerate the cooling of the cell 111. Moreover, the adhesive application is simple and convenient. In this embodiment, preferably, as follows: Figure 4 As shown, along the arrangement direction of two adjacent cell groups 11, such as the Y direction, the projection of the inter-cell liquid cooling plate 14 completely covers the projection of the adjacent cell group 11. This allows the inter-cell liquid cooling plate 14 to provide uniform heat dissipation to the corresponding cell group 11 from all directions. Of course, this is not the only option; it can be designed according to actual needs. In this embodiment, preferably, as follows: Figures 2 to 4 As shown, the cell module 1 also includes an end plate 12 and a side plate 13; wherein, along a direction perpendicular to the arrangement direction of the multiple cell groups 11, such as the X direction, both ends of the assembly formed by the multiple cell groups 11 are provided with end plates 12; along the arrangement direction of the multiple cell groups 11, both sides of the assembly formed by the multiple cell groups 11 are provided with side plates 13, and both ends of any side plate 13 are connected to the two end plates 12; the inter-module liquid cooling plate 2 is connected to the side plate 13 and / or end plate 12 of the adjacent cell module 1, and preferably can be connected by means of bolts, clips or adhesives. As can be seen from the structure described above, the end plate 12 provides the force and displacement to suppress the battery cell 111 during the cycling process, and the side plate 13 mainly provides the force to suppress the battery cell 111 during the cycling process. It is also connected to the end plate 12 by welding, screwing or hot riveting, etc., to completely fix the four sides of the assembly of multiple battery cell groups 11, making the overall structure more robust and stable. In this embodiment, preferably, as follows: Figures 2 to 4 As shown, along a direction perpendicular to the arrangement direction of the multiple battery cell groups 11, such as the X direction, the projection of the assembly formed by the multiple battery cell groups 11 falls completely within the projection of the end plate 12. As can be seen from the structure described above, the end plate 12 can completely cover the large side of the battery cell 111, effectively suppressing the expansion of the large side of the battery cell 111. Of course, it is not limited to this. In this embodiment, preferably, as follows: Figure 4 As shown, the side plate 13 is U-shaped. The U-shaped side plate 13 can wrap around the entire side of the battery cell assembly 11 along its length and extends to the outer sides of the front and rear end plates 12, making the side plate 13 fit more firmly and stably with the end plates 12. Of course, it is not limited to this, and the shape of the side plate 13 is not limited to this and can be designed according to actual needs. In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the end plates 12 of two adjacent battery cell modules 1 are connected, thereby connecting all the battery cell modules 1 together, making the overall strength higher, and of course, not limited to this.

[0054] Furthermore, preferably, the end plates 12 of two adjacent battery cell modules 1 can be connected by bolts, welding, or snap-fit, etc.

[0055] In this embodiment, preferably, as follows: Figure 1 As shown, one of the end plates 12 of two adjacent battery cell modules 1 is provided with a guide post 121, and the other is provided with a guide hole. The guide post 121 and the guide hole cooperate to play a role in assembly positioning, which helps to improve assembly efficiency. Of course, the guide post 121 and the guide hole can be omitted.

[0056] In this embodiment, preferably, as follows: Figure 4 As shown, the battery module also includes a total positive output terminal 4 and a total negative output terminal 5, and the total positive output terminal 4 and the total negative output terminal 5 are disposed on opposite sides of one of the outermost end plates 12.

[0057] As can be seen from the structure described above, integrating the total positive output 4 and the total negative output 5 onto the same end plate 12 results in higher integration and facilitates wiring, improving operational convenience. Furthermore, the total positive output 4 and the total negative output 5 are located on opposite sides of the same end plate 12, so they do not interfere with each other. In this embodiment, preferably, as follows: Figure 4 and Figure 6 As shown, each cell 111 in each cell module 1 has a tab 1111 formed on one side, and all the tabs in the same cell module 1 have the same orientation. That is, all the cells 111 in the same cell module 1 have tabs 1111 led out on one side, and the tabs 1111 in the same cell module 1 have the same orientation. For example, all the tabs 1111 in the same cell module 1 are set to the top, that is, all the cells 111 in the same cell module 1 have tabs 1111 led out from the top. In a single cell module 1, all the tabs 1111 are oriented towards the bottom, meaning that all cells 111 in the same cell module 1 have bottom tabs 1111. Alternatively, all the tabs 1111 in the same cell module 1 are oriented towards the side, meaning that all cells 111 in the same cell module 1 have side tabs in the same direction. It can be seen that the single-sided tab structure improves the volume utilization rate of the cell 111 by 5-10% compared to the double-sided tab structure, reduces the amount of structural components, and reduces the weight by 15-20%.

[0058] Furthermore, preferably, in this embodiment with only two battery cell modules 1, the lead tabs 1111 of the upper and lower battery cell modules 1 face opposite directions, for example, the top lead tab 1111 of the upper battery cell module 1 and the bottom lead tab 1111 of the lower battery cell module 1. Of course, it is not limited to this.

[0059] Furthermore, preferably, all the cells 111 in each cell module 1 are provided with a tab support plate 6, and the tab support plate 6 is connected to the end plate 12 and / or the side plate 13. It can be seen that for the tabs 1111 leading out from the same side, the same tab support plate 6 can be provided, which saves parts, reduces weight, and can fix the tab support plate 6 to the end plate 12 and / or the side plate 13 together, thus providing reinforcement.

[0060] In this embodiment, preferably, as follows: Figure 3 As shown, the battery module also includes a connecting strip 7. Two adjacent cell groups 11 in two adjacent cell modules 1 are electrically connected through the connecting strip 7. The connecting strip 7 is disposed on the side of the end plate 12 away from the cell 111, and the end plate 12 has a clearance through hole corresponding to the connecting strip 7.

[0061] As can be seen from the structure described above, the connecting strip 7 is used to realize the electrical connection between two close battery cell groups 11 between two different battery cell modules 1. The connecting strip 7 is installed on the end plate 12 to support the busbar, making the busbar more stable. The end plate 12 is provided with a clearance through hole corresponding to the connecting strip 7 to achieve clearance. Furthermore, preferably, the connecting row 7 is provided with a protective cover 8, and the protective cover 8 is detachably fastened to the outside of the connecting row 7.

[0062] In this embodiment, preferably, as follows: Figure 5 As shown, the battery cell assembly 11 includes battery cells 111, a heat insulation layer 112, and a buffer layer 113; wherein, each battery cell assembly 11 includes multiple battery cells 111, and the multiple battery cells 111 are arranged sequentially along the thickness direction of the battery cells 111 to form a row of battery cells, and the thickness direction of the battery cells 111 is the same as the direction perpendicular to the arrangement direction of the multiple battery cell assemblies 11, such as the X direction; the heat insulation layer 112 and the buffer layer 113 are interspersed between the multiple battery cells 111. Based on the structure described above, the heat insulation layer 112 serves to insulate against thermal runaway, which is to prevent the thermal diffusion of the battery cell 111. The buffer layer 113 serves to buffer and absorb expansion forces, which is to meet the needs of dimensional changes in the battery cell 111 during cycling. Furthermore, preferably, in this embodiment, the thickness direction of the battery cell 111 is the same as the X direction, the length direction of the battery cell 111 is the same as the Y direction, and the height direction of the battery cell 111 is the same as the Z direction, satisfying the requirements for stacking and use. Of course, it is not limited to this; the thickness direction, length direction, and height direction of the battery cell 111 can also be reasonably selected. Examples are as follows: Example 1: The thickness direction of the battery cell 111 can also be the same as the Y direction, the length direction of the battery cell 111 can also be the same as the X direction, and the height direction of the battery cell 111 can also be the same as the Z direction; Example 2: The thickness direction of the battery cell 111 can also be the same as the Z direction, the length direction of the battery cell 111 can also be the same as the X direction, and the height direction of the battery cell 111 can also be the same as the Y direction; Example 3: The length direction of the battery cell 111 can also be the same as the Z direction, the height direction of the battery cell 111 can also be the same as the X direction, and the thickness direction of the battery cell 111 can also be the same as the Y direction.

[0063] In this embodiment, preferably, as follows: Figure 5As shown, in each cell group 11, along the arrangement direction of the multiple cells 111, such as the X direction, each pair of adjacent cells 111 is a group, and a heat insulation layer 112 is provided between the two cells 111 in a group, and a buffer layer 113 is provided between two adjacent groups of cells 111; along the arrangement direction of the multiple cells 111, a buffer layer 113 is provided on the outside of the first cell 111 in the first group of cells 111, and a buffer layer 113 is provided on the outside of the last cell 111 in the last group of cells 111. As can be seen from the structure described above, the heat insulation layer 112 and the buffer layer 113 are more evenly and rationally distributed, and the heat insulation, buffering and absorption of expansion force are better. Of course, the arrangement of the heat insulation layer 112 and the buffer layer 113 can also be designed arbitrarily. In this embodiment, preferably, as follows: Figure 5 As shown, along the arrangement direction of the multiple cells 111, such as the X direction, the distance L between any two adjacent cells 111 is 0.5-3mm, ensuring sufficient gap for installing the heat insulation layer 112 or the buffer layer 113. In this embodiment, preferably, as follows: Figure 5 As shown, the insulation layer 112 is made of felt material with a temperature resistance of 200-800℃, which has good heat insulation effect and low cost. Of course, other materials can also be used for the insulation layer 112. In this embodiment, preferably, as follows: Figure 5 As shown, the thickness t1 of the insulation layer 112 is 0.8-5mm. If the thickness of the insulation layer 112 is too small, it will not play a role in heat insulation. If the thickness of the insulation layer 112 is too large, it will take up space. Therefore, the value is taken within the above range. Of course, the thickness of the insulation layer 112 is not limited to the above. It can also be less than 0.8mm or greater than 5mm, depending on the actual needs of the design. In this embodiment, preferably, as follows: Figure 5 As shown, the buffer layer 113 is made of polyurethane polymer material, which mainly meets the size change requirements of the battery cell 111 during cycling. In this embodiment, preferably, as follows: Figure 5 As shown, the thickness t2 of the buffer layer 113 is 0.8-5mm. If the thickness of the buffer layer 113 is too small, it will not be able to absorb the expansion force and meet the needs of the dimensional changes of the cell 111 during the cycle. If the thickness of the buffer layer 113 is too large, it will occupy space. Therefore, the value is taken within the above range. Of course, the thickness of the buffer layer 113 is not limited to the above. It can also be less than 0.8mm or greater than 5mm, depending on the actual needs of the design. In this embodiment, preferably, as follows: Figure 6As shown, the thickness of cell 111 is T, and 4mm≤T≤25mm; the height of cell 111 is H, and 80mm≤H≤250mm; the length of cell 111 is W, and 80mm≤W≤150mm. As can be seen from the structure described above, designing the battery cell 111 as flat helps to arrange more battery cells 111 in a limited space. Of course, the size of the battery cell 111 is not limited to the above and can be designed according to actual needs. In this embodiment, preferably, as follows: Figure 2 As shown, along the arrangement direction of multiple battery cells 111, such as the X direction, the length of each battery cell group 11 is 50-800mm, which meets the usage requirements. Of course, it is not limited to this. As the number of battery cells 111 increases or decreases, the length of each battery cell group 11 can be less than 50mm or greater than 800mm, depending on the actual needs. In this embodiment, preferably, the liquid cooling plate 2 between modules is made of low-density aluminum-magnesium alloy, which has good thermal conductivity and low mass. Of course, the material of the liquid cooling plate 2 between modules is not limited to this. In this embodiment, preferably, the liquid cooling plate 14 between the cells is made of low-density aluminum-magnesium alloy, which has good thermal conductivity and low mass. Of course, the material of the liquid cooling plate 14 between the cells is not limited to this. In this embodiment, preferably, as follows: Figure 2 As shown, the inter-module liquid cooling plate 2 is connected to the inter-cell liquid cooling plate 14 in the adjacent cell module 1 through the adapter 9, so that the inter-module liquid cooling plate 2 and the inter-cell liquid cooling plate 14 are connected to form a flow path. The adapter 9 can be a block with an internal cavity and a connecting port, or it can be an existing pipeline, etc., depending on the actual needs.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery module, characterized in that, include: The battery cell module and the inter-module liquid cooling plate; wherein, the number of battery cell modules is multiple, and they are arranged along one or more of the X, Y and Z directions to form a spatial array structure, and the inter-module liquid cooling plate is provided between at least some of the adjacent battery cell modules; each battery cell module includes at least one battery cell group, and when the number of battery cell groups is multiple, the multiple battery cell groups are arranged along one of the X, Y and Z directions.

2. The battery module according to claim 1, characterized in that, The inter-module liquid cooling plate is connected to the adjacent battery cell module via thermally conductive structural adhesive; and / or Along the arrangement direction of two adjacent battery cell modules, the projection of the inter-module liquid cooling plate between them completely covers the projection of the adjacent battery cell module; and / or The edge of the liquid cooling plate between the modules is provided with an overflow blocking part.

3. The battery module according to claim 1, characterized in that, The battery module also includes a liquid cooling plate between cells, and the liquid cooling plate between cells is provided between any two adjacent cells in each cell module.

4. The battery module according to claim 3, characterized in that, The liquid cooling plate between the cells is connected to the adjacent cell assembly via thermally conductive structural adhesive; and / or Along the arrangement direction of two adjacent cell groups, the projection of the inter-cell liquid cooling plate between them completely covers the projection of the adjacent cell group; and / or The inter-module liquid cooling plate is connected to the inter-cell liquid cooling plate in the adjacent cell module via a connecting component; and / or The liquid cooling plate between the battery cells is made of low-density aluminum-magnesium alloy.

5. The battery module according to claim 1, characterized in that, The cell module further includes end plates and side plates; wherein, along a direction perpendicular to the arrangement direction of the multiple cell groups, the end plates are provided at both ends of the assembly formed by the multiple cell groups; along the arrangement direction of the multiple cell groups, the side plates are provided on both sides of the assembly formed by the multiple cell groups, and the two ends of any side plate are connected to the two end plates; the inter-module liquid cooling plate is connected to the side plates and / or end plates of the adjacent cell module.

6. The battery module according to claim 5, characterized in that, Along a direction perpendicular to the arrangement direction of the plurality of battery cells, the projection of the assembly formed by the plurality of battery cells falls completely within the projection of the end plate; and / or The side panel is U-shaped; and / or The end plates of two adjacent battery cell modules are connected; and / or One of the end plates of two adjacent battery cell modules is provided with a guide post, and the other is provided with a guide hole, and the guide post and the guide hole cooperate with each other.

7. The battery module according to claim 5, characterized in that, The battery module further includes a total positive output terminal and a total negative output terminal, and the total positive output terminal and the total negative output terminal are disposed on opposite sides of one of the outermost end plates; and / or Each cell in each of the aforementioned cell modules has a tab formed on one side, and all tabs in the same cell module face the same direction; all cells in each cell module are jointly provided with a tab support plate, and the tab support plate is connected to the end plate and / or the side plate; and / or The battery module further includes a connecting strip, wherein two adjacent cell groups in two adjacent cell modules are electrically connected through the connecting strip, and the connecting strip is disposed on the side of the end plate away from the cell, and the end plate has a clearance through hole corresponding to the connecting strip; and / or The thickness direction of the battery cell is the same as the X direction, the length direction of the battery cell is the same as the Y direction, and the height direction of the battery cell is the same as the Z direction.

8. The battery module according to claim 1, characterized in that, The battery cell assembly includes a battery cell, a heat insulation layer, and a buffer layer; wherein each battery cell assembly includes multiple battery cells, and the multiple battery cells are arranged sequentially along the thickness direction of the battery cells to form a row of battery cells, and the thickness direction of the battery cells is the same as the direction perpendicular to the arrangement direction of the multiple battery cell assemblies; the heat insulation layer and the buffer layer are interspersed between the multiple battery cells.

9. The battery module according to claim 8, characterized in that, In each of the cell groups, along the arrangement direction of the multiple cells, every two adjacent cells form a group, and a heat insulation layer is provided between the two cells in a group, and a buffer layer is provided between two adjacent groups of cells; along the arrangement direction of the multiple cells, the buffer layer is provided on the outside of the first cell in the first group, and the buffer layer is provided on the outside of the last cell in the last group; and / or Along the arrangement direction of the plurality of battery cells, the distance between any two adjacent battery cells is 0.5-3 mm; and / or The insulation layer is made of felt-like material that can withstand temperatures of 200-800℃; and / or The thickness of the insulation layer is 0.8-5 mm; and / or The buffer layer is made of polyurethane polymer material; and / or The thickness of the buffer layer is 0.8-5mm.

10. The battery module according to any one of claims 1 to 9, characterized in that, The thickness of the battery cell is T, and 4mm ≤ T ≤ 25mm; and / or The height of the battery cell is H, and 80mm ≤ H ≤ 250mm; and / or The length of the battery cell is W, and 80mm ≤ W ≤ 150mm; and / or Along the arrangement direction of the plurality of cells in each of the cell groups, the length of each cell group is 50-800 mm; and / or The liquid cooling plate between modules is made of low-density aluminum-magnesium alloy.

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