Battery assembly and battery module

Abstract

The utility model provides a battery assembly and a battery module, the battery assembly comprises a plurality of battery cells, the plurality of battery cells are arranged in sequence along the Y direction, each battery cell is provided with a pole on a first end face of the Z direction, and a plurality of bars are connected with one ends of the plurality of poles deviating from the first end face, so that the plurality of battery cells are connected in series or in parallel. A clamping groove is jointly defined by each bar, the pole connected with the bar and the first end face, the pressing piece is at least partially embedded in the multiple clamping grooves, the part, embedded in the clamping groove, of the pressing piece is suitable for applying pressure to the first end face, expansion of the battery cell in the Z direction is limited, the pressing piece is easy to install and operate, and the clamping piece is convenient to use. And the assembly efficiency of the battery assembly is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage technology field, concretely relates to battery assembly and battery module. BACKGROUND

[0002] The battery module on the market currently usually includes a shell and a plurality of battery cells installed on the shell, the bottom of the plurality of battery cells is fixedly connected to a liquid cooling plate through a heat-conducting structure adhesive, and the top of the battery cell expands in the Z direction when the battery cell expands due to constraints at the bottom of the battery cell. In the related art, a pressing member is usually provided to suppress the expansion of the top of the battery cell in the Z direction. However, the pressing member is usually connected and fixed to the shell through a connecting member, which results in complicated installation operation of the pressing member. SUMMARY

[0003] Embodiments of the utility model provide a battery assembly and a battery module, which can simplify the installation operation of a pressing member for suppressing the expansion of the top of a battery cell in the Z direction.

[0004] In a first aspect, embodiments of the utility model provide a battery assembly.

[0005] In an embodiment, the battery assembly comprises:

[0006] a plurality of battery cells, the plurality of battery cells are arranged in sequence along a Y direction, and each battery cell is provided with a pole at a first end face in a Z direction;

[0007] a plurality of B pieces, each B piece is connected to one end of a pole away from the first end face to arrange the plurality of battery cells in series or in parallel, and each B piece, the pole connected to the B piece, and the first end face jointly enclose a clamping groove;

[0008] a pressing member, the pressing member is at least partially embedded in the plurality of clamping grooves.

[0009] In an embodiment, the first end face is provided with two poles, the two poles are arranged at intervals along an X direction, and the two poles have first sides facing away from each other, and the B piece, the first side connected to the B piece, and the first end face jointly enclose the clamping groove.

[0010] In an embodiment, the clamping groove is arranged to extend along the Y direction.

[0011] The pressing member comprises a plurality of first pressing strip segments arranged at intervals, each first pressing strip segment extends along the Y direction, and the plurality of first pressing strip segments are respectively embedded in the plurality of clamping grooves.

[0012] In an embodiment, a first heat-conducting structure adhesive is further arranged between the pole and the first pressing strip segment; and / or,

[0013] A second heat-conducting structural adhesive is arranged between the first end face and the first pressing strip segment.

[0014] In an embodiment, an insulating support is further included, the insulating support is mounted to the first end face, and the insulating support has a plurality of mounting holes.

[0015] The plurality of bus bars are adapted to be connected to one end of the plurality of pole columns away from the first end face through the plurality of mounting holes, and the periphery of each bus bar abuts against the inner side wall of the corresponding mounting hole.

[0016] In an embodiment, the first end face is provided with two pole columns, the two pole columns are spaced apart along the X direction, the two pole columns have oppositely arranged second sides, a gap is formed between the second sides and the inner side wall of the mounting hole, and a third heat-conducting structural adhesive is filled in the gap.

[0017] In an embodiment, the pressing member includes a plurality of first pressing strip segments embedded in the plurality of clamping grooves.

[0018] The inner side wall of each mounting hole is convexly provided with a pressing segment, each pressing segment is below the corresponding bus bar and is used to press the corresponding first pressing strip segment.

[0019] In an embodiment, the hardness of the first pressing strip segment is greater than the hardness of the pressing segment.

[0020] In an embodiment, the insulating support further includes a connecting arm between the two mounting holes along the Y direction.

[0021] The pressing member further includes a plurality of second pressing strip segments, the plurality of second pressing strip segments are one-to-one corresponding to the plurality of connecting arms, and each second pressing strip segment is adapted to be pressed to the first end face by the corresponding connecting arm.

[0022] In an embodiment, the plurality of second pressing strip segments are integrally formed with the plurality of first pressing strip segments.

[0023] In an embodiment, the insulating support includes two frame bodies spaced apart along the X direction and connected to the first end face, and each frame body includes:

[0024] A first connecting portion between adjacent two pole columns along the X direction, the first connecting portion extends along the Y direction;

[0025] A second connecting portion on a side opposite to the adjacent two pole columns along the X direction, and the second connecting portion is opposite to the first connecting portion.

[0026] A plurality of third connecting portions are arranged along the Y direction at intervals and between the first connecting portion and the second connecting portion, two ends of each of the connecting portions are connected with the first connecting portion and the second connecting portion respectively, so that the first connecting portion, the second connecting portion and two adjacent third connecting portions jointly form the mounting hole, and the third connecting portion comprises the connecting arm.

[0027] In an embodiment, each of the bar piece and the insulating support is further provided with a positioning structure, the positioning structure comprises a positioning protrusion and a positioning groove matched with the positioning protrusion, one of the positioning protrusion and the positioning groove is arranged on the bar piece, and the other is arranged on the insulating support.

[0028] In an embodiment, the thickness of the pressing member is L1, the thickness of the pole is L2, and 0 < L1 / L2 < 1.

[0029] In an embodiment, the thickness of the pressing member is L1, the thickness of the pole is L2, and 0 < L1 / L2 < 1.

[0030] In an embodiment, the thickness of the pressing member is L1, the thickness of the pole is L2, and 0 < L1 / L2 < 1.

[0031] In an embodiment, the thickness of the pressing member is L1, the thickness of the pole is L2, and 0 < L1 / L2 < 1.

[0032] In an embodiment, the battery module comprises the battery assembly as described above.

[0033] In an embodiment, a plurality of the battery assemblies are arranged along the X direction at intervals.

[0034] The embodiment of the utility model has the advantages of:

[0035] In this embodiment of the invention, multiple battery cells are arranged sequentially along the Y-axis. This arrangement helps to disperse the heat generated by the cells during charging and discharging, reducing local overheating. Furthermore, this compact structural design, with multiple cells arranged sequentially along the Y-axis, optimizes the space utilization of the battery assembly, thereby improving its energy density and power density. Each cell's first end face is provided with two terminals spaced apart along the X-axis. This design facilitates series or parallel connection via terminals, improving the overall performance of the battery assembly. A clamping element is embedded in a slot formed by the terminals, terminals, and the first end face of the cell. This simplifies the installation of the clamping element and improves the assembly efficiency of the battery assembly. Because the clamping element is embedded in the slot of each cell, it can apply pressure to the corresponding first end face. The pressure is evenly distributed among the cells, ensuring that each cell receives the same suppressive force and avoiding localized overvoltage or undervoltage. The combination of the clamping plate and the clamping component enhances the structural rigidity of the entire battery assembly, maintaining its stability and integrity even when the cells expand. Furthermore, the expansion of the cells in the Z direction is limited, reducing the relative displacement between cells and thus lowering the risk of loosening or disconnection at the connection points. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a cross-sectional schematic diagram of a battery assembly (at one angle) provided in an embodiment of this utility model;

[0038] Figure 2 yes Figure 1 The diagram shown is a magnified view of part A.

[0039] Figure 3 yes Figure 1 A three-dimensional structural diagram of the battery assembly (partial structure) shown;

[0040] Figure 4 This is a cross-sectional schematic diagram of the battery assembly (from another angle) provided in an embodiment of this utility model;

[0041] Figure 5 This is a three-dimensional structural schematic diagram of the clamping member provided in an embodiment of this utility model;

[0042] Figure 6 This is a three-dimensional structural diagram of the frame provided in an embodiment of the present utility model;

[0043] Figure 7 is a sectional view of the battery module provided by the embodiment of the utility model.

[0044] Mark explanation:

[0045] 100, battery module;

[0046] 10, battery assembly, 1, battery cell, 11, first end face, 12, pole, 121, first side, 122, second side, 2, b piece, 3, clamping groove, 4, compression part, 41, first compression strip section, 42, second compression strip section, 51, first heat-conducting structural glue, 52, second heat-conducting structural glue, 53, third heat-conducting structural glue, 54, fourth heat-conducting structural glue, 6, insulating support, 61, mounting hole, 62, compression section, 63, connecting arm, 64, frame body, 641, first connecting part, 6411, groove, 642, second connecting part, 643, third connecting part, 8, CCS integrated board;

[0047] 20, shell, 201, mounting cavity;

[0048] 30, liquid cooling plate;

[0049] 40, foaming glue. Specific implementation

[0050] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the utility model, and is not used to limit the utility model. In the utility model, the orientation words such as 'up' and 'down' are usually used to indicate the up and down of the device in the actual use or working state, and the specific is the direction of the drawing in the drawing; and 'inner' and 'outer' are used to the contour of the device.

[0051] The battery module on the market at present usually includes shell and multiple battery cells installed on the shell, the bottom of the multiple battery cells is fixedly bonded with the liquid cooling plate through heat-conducting structural glue, as the bottom of the battery cell is constrained, when the battery cell expands, the top of the battery cell will expand in Z direction, in the related art, the compression part is usually arranged to restrain the expansion of the top of the battery cell in Z direction, however, the compression part is usually fixedly connected with the shell through the connecting part, thus, the installation operation of the compression part is tedious.

[0052] In view of this, the utility model provides a battery assembly, Figures 1 to 6The battery assembly provided by the utility model can simplify the installation operation of the compression member used to suppress the expansion of the top of the battery cell in the Z direction. The battery assembly will be described in detail below with reference to the main drawings.

[0053] With reference to Figures 1 to 3 The battery assembly 10 comprises a plurality of battery cells 1, a plurality of busbars 2 and a compression member 4. The plurality of battery cells 1 are arranged in sequence along the Y direction. Each battery cell 1 is provided with a pole 12 on the first end face 11 in the Z direction. The plurality of busbars 2 are connected to the ends of the plurality of poles 12 away from the first end face 11, so as to arrange the plurality of battery cells 1 in series or in parallel. Each busbar 2, the pole 12 connected to the busbar 2 and the first end face 11 jointly form a clamping groove 3. The compression member 4 is at least partially embedded in the plurality of clamping grooves 3.

[0054] In the embodiment of the utility model, the plurality of battery cells 1 are arranged in sequence along the Y direction. This arrangement mode is helpful to disperse the heat generated by the battery cells 1 during charging and discharging, and reduce the local overheating phenomenon. In addition, the compact structure design of the arrangement of the plurality of battery cells 1 in sequence along the Y direction is helpful to optimize the space utilization of the battery assembly 10, so as to improve the energy density and power density of the battery assembly 10. The first end face 11 of each battery cell 1 is provided with a pole 12. This design is convenient for series connection or parallel connection through the busbar 2, and improves the overall performance of the battery assembly 10. The compression member 4 is embedded in the clamping groove 3 jointly formed by the busbar 2, the pole 12 and the first end face 11 of the battery cell 1. In this way, the installation operation of the compression member is simple, and the assembly efficiency of the battery assembly 10 is improved. Since the compression member 4 is embedded in the clamping groove 3 of each battery cell 1, the compression member can apply pressure to the corresponding first end face. The pressure is uniformly distributed between the battery cells 1, so as to ensure that each battery cell 1 receives the same restraining force, and avoid the local overpressure or underpressure condition. The combination of the busbar 2 and the compression member 4 enhances the structural rigidity of the entire battery assembly 10. Even in the case of expansion of the battery cells 1, the stability and integrity of the battery assembly 10 can be maintained, and the expansion of the battery cells 1 in the Z direction is limited, so as to reduce the relative displacement between the battery cells 1, thereby reducing the risk of loosening or disconnection of the connection part.

[0055] It should be noted that the first end face 11 in the Z direction means that the normal line of the first end face 11 is parallel to the Z direction. In addition, the compression member 4 has a certain elastic deformation capacity. This elastic deformation capacity enables the compression member 4 to deform to a certain extent when the battery cells 1 expand, so as to absorb and relieve the expansion force of the battery cells 1, and avoid excessive impact on the battery assembly 10. The compression member 4 can be made of various materials, for example, the compression member 4 can be made of resin or plastic. Specifically, the material of the compression member 4 can be selected as needed, which is not limited in the present application.

[0056] With reference toFigure 2 In an embodiment, the first end surface is provided with two pole columns 12, the two pole columns 12 are arranged along the X direction and have first sides 121 facing away from each other, the gasket 2, the first sides 121 connected with the gasket 2 and the first end surface 11 jointly form the clamping groove 3, so that each battery cell 1 has sufficient space between the two clamping grooves 3 for the installation of the pressing member 4, ensuring sufficient space for the operation and installation of the pressing member 4, making the operation simple.

[0057] Referring to Figure 4 and Figure 5 In an embodiment, the clamping groove 3 extends along the Y direction, the pressing member 4 includes a plurality of first pressing strips 41 arranged at intervals, each first pressing strip 41 extends along the Y direction, and the plurality of first pressing strips 41 are respectively embedded in the plurality of clamping grooves 3, so that the clamping groove 3 provides precise guidance and positioning for the first pressing strip 41, enabling the first pressing strip 41 to be accurately embedded and fixed at a predetermined position. Since the first end surface 11 is part of the clamping groove 3, through the close cooperation of the clamping groove 3 and the first pressing strip 41, the first pressing strip 41 has a certain deformation when installed in the clamping groove 3, and the deformed first pressing strip 41 can exert pressure on the first end surface 11, so that the pressure can balance the expansion force of the battery cell 1 in the Z direction, thereby avoiding or reducing the expansion of the battery cell 1 in the Z direction. In addition, the extension directions of the clamping groove 3 and the first pressing strip 41 are consistent, making the overall battery assembly 10 more compact and reasonable in spatial layout, thereby improving the space utilization rate. The consistent extension directions of the clamping groove 3 and the first pressing strip 41 make the installation operation simple and improve the installation efficiency.

[0058] It should be noted that in other embodiments, the shapes of the first pressing strip 41 and the clamping groove 3 are adapted to each other, and the shapes of the first pressing strip 41 and the clamping groove 3 can also be V-shaped, W-shaped or C-shaped, etc. Specifically, the present application does not limit the shapes of the first pressing strip 41 and the clamping groove 3.

[0059] Referring to Figure 2 In an embodiment, a first heat-conducting structural adhesive 51 is further provided between the pole column 12 and the first pressing strip 41, so that the first heat-conducting structural adhesive 51, as a material with high heat conduction performance, mainly functions to rapidly transfer heat from the pole column 12 to the first pressing strip 41, and then dissipate the heat through the heat dissipation design of the first pressing strip 41. In addition to the heat conduction function, the first heat-conducting structural adhesive 51 also plays a role in fixing and connecting the pole column 12 and the first pressing strip 41. It can fill the small gap between the two, forming a stable connection interface, preventing the first pressing strip 41 from loosening or falling off due to vibration or temperature changes.

[0060] Continuing to refer to Figure 2In an embodiment, a second heat-conducting structural adhesive 52 is further arranged between the first end face 11 and the first compression strip segment 41. In this way, the second heat-conducting structural adhesive 52, as a high-efficiency heat-conducting material, plays a core role in rapidly transferring heat from the first end face 11 of the battery cell 1 to the first compression strip segment 41, and then dissipating the heat to the external environment through the heat dissipation design of the first compression strip segment 41, thereby achieving effective heat management. In addition to the heat conduction function, the second heat-conducting structural adhesive 52 can fill the small gap between the first end face 11 and the first compression strip segment 41, forming a stable connection interface, and preventing the first compression strip segment 41 from loosening or falling off due to vibration or temperature change.

[0061] It should be noted that the features of the first heat-conducting structural adhesive 51 arranged between the pole 12 and the first compression strip segment 41 and the second heat-conducting structural adhesive 52 arranged between the first end face 11 and the first compression strip segment 41 can be set alternatively or simultaneously. When both features are set simultaneously, the heat dissipation effect and the fixing effect are the best.

[0062] Referring to Figure 3 and Figure 4 In an embodiment, an insulating support 6 is further included, which is installed on the first end face 11. The insulating support 6 has a plurality of mounting holes 61, and the plurality of tabs 2 are adapted to pass through the plurality of mounting holes 61 and be connected to the end of the plurality of poles 12 away from the first end face 11. The periphery of each tab 2 abuts against the inner side wall of the corresponding mounting hole 61. In this way, the insulating support 6 provides stable support for the tabs 2, which helps to reduce the loosening or displacement of the tabs 2 caused by vibration or impact, thereby ensuring the stability and durability of the connection between the tabs 2 and the poles 12. The mounting holes 61 on the insulating support 6 provide accurate positioning for the connection between the tabs 2 and the poles 12, so as to ensure that the tabs 2 can accurately pass through and be connected to the poles 12, thereby reducing performance problems or safety hazards caused by inaccurate connection.

[0063] It should be noted that the insulating support 6 is designed to provide electrical isolation to prevent current or voltage from flowing in a path that should not flow. Therefore, the insulating support 6 is made of a material with high insulation performance, such as plastic, ceramic, or special insulating resin. In addition, the tabs 2 need to be electrically connected to the poles, and therefore the material of the tabs 2 is a conductive metal, such as aluminum, iron, or copper, or an alloy. Specifically, the present application does not limit this.

[0064] Referring to Figure 2In an embodiment, the first end face 11 is provided with two polar posts 12, which are spaced apart along the X direction and have oppositely arranged second sides 122. A gap is formed between the second side 122 and the inner side wall of the mounting hole 61, and the third thermally conductive structural adhesive 53 is filled in the gap. In this way, the third thermally conductive structural adhesive 53 is filled in the gap between the second side 122 of the polar post 12 and the inner side wall of the mounting hole, forming an efficient heat conduction path. This helps to quickly transfer the heat generated by the battery cell 1 during operation to the insulating support 6, thereby accelerating heat dissipation and reducing the operating temperature of the battery cell 1. The third thermally conductive structural adhesive 53 has better thermal conductivity than air, so filling the gap can reduce heat accumulation caused by air resistance. This helps to keep the battery cell 1 within an appropriate operating temperature range, improving the overall performance and lifespan of the battery assembly 10. The third thermally conductive structural adhesive 53 not only has a heat conduction effect, but also has a certain adhesive strength. It can firmly fix the polar post 12 in the mounting hole, preventing loosening or falling off caused by vibration or impact. This fixing effect helps to maintain the stability of the internal structure of the battery assembly 10 and improves the reliability of the system. The filling of the third thermally conductive structural adhesive 53 can disperse the stress concentration of the polar post 12 around the mounting hole, reducing material fatigue or damage caused by excessive stress. This helps to prolong the service life of the battery assembly 10.

[0065] With reference to Figure 2 and Figure 6 In an embodiment, the compression member 4 includes a plurality of first compression strip segments 41 embedded in the plurality of clamping grooves 3. The inner side wall of each mounting hole 61 is provided with a compression segment 62, each compression segment 62 is located below the corresponding gasket 2 and is used to compress the corresponding first compression strip segment 41. In this way, when the gasket 2 passes through the mounting hole 61 and connects with the polar post 12, the compression segment 62 will generate a pressure on the first compression strip segment 41 towards the first end face 11, so that the pressure can balance the Z-direction expansion force of the battery cell 1, avoiding or reducing the Z-direction expansion deformation of the battery cell 1.

[0066] In an embodiment, the first pressing strip segment 41 has a higher hardness than the pressing segment 62, so that the first pressing strip segment 41 can maintain its shape and stability more effectively when subjected to external pressure or vibration. This difference in hardness makes the first pressing strip segment 41 a "strong point" in the structure, capable of bearing greater loads, thereby enhancing the structural strength of the entire battery assembly 10. In the battery assembly 10, stress concentrations can occur in certain areas due to the presence of components such as the battery cell 1, the pole 12, the gasket 2, etc. When the first pressing strip segment 41 has a higher hardness, it can to some extent disperse these stress concentrations, reducing material fatigue or damage caused by excessive stress. In addition, the higher hardness of the first pressing strip segment 41 means that it can better resist external pressure and deformation. When the battery cell 1 generates a Z-direction expansion force due to factors such as charging and discharging, temperature changes, etc., the first pressing strip segment 41 can maintain its shape and stability, effectively limiting the expansion of the battery cell 1 in the Z-direction. Although the pressing segment 62 has a lower hardness, it plays a key role in cooperation with the first pressing strip segment 41. The pressing segment 62 presses the first pressing strip segment 41, to some extent, increasing the pressure exerted by the first pressing strip segment 41 on the first end face 11, thereby better inhibiting the expansion and deformation of the battery cell 1 in the Z-direction. At the same time, the pressing segment 62 can also to some extent disperse the direct impact of the battery cell 1 expansion force on the first pressing strip segment 41. Since the pressing segment 62 has a lower hardness, it can to some extent absorb the stress and deformation generated when the battery cell 1 expands, thereby reducing the impact on the first pressing strip segment 41 and the entire connection structure, thereby helping to prolong the service life of the battery assembly 10 and improve its reliability.

[0067] With reference to Figure 4 and Figure 6 In an embodiment, the insulating support 6 further comprises a connecting arm 63 between the two mounting holes 61 in the Y-direction, and the pressing member 4 further comprises a plurality of second pressing strip segments 42, which are one-to-one corresponding to the plurality of connecting arms 63. Each second pressing strip segment 42 is adapted to be pressed by the corresponding connecting arm 63 to the first end face 11, so that the second pressing strip segment 42 can exert pressure on the corresponding area of the first end face 11, thereby inhibiting the expansion and deformation of the battery cell 1 in the Z-direction.

[0068] With reference to Figure 5In an embodiment, the plurality of second pressing strip segments 42 are integrally formed with the plurality of first pressing strip segments 41. In this way, the integrally formed design allows the plurality of second pressing strip segments 42 and the plurality of first pressing strip segments 41 to be quickly taken and placed, improving the installation efficiency of the pressing member 4. The integrally formed plurality of second pressing strip segments 42 and the plurality of first pressing strip segments 41 are connected through the continuity of the material itself. When subjected to external pressure or vibration, the integrally formed structure can better maintain its shape and stability, reducing the risk of deformation and damage. During the charging and discharging process of the battery cell 1, its expansion and contraction are dynamically changing. The integrally formed plurality of second pressing strip segments 42 and the plurality of first pressing strip segments 41 can adjust accordingly with the expansion and contraction of the battery cell 1, maintaining a dynamic balance with the battery cell 1. This balanced state helps to reduce the internal stress of the battery cell 1 due to expansion, prolonging the service life of the battery assembly 10. By integrally forming the plurality of second pressing strip segments 42 with the plurality of first pressing strip segments 41, a continuous support surface can be formed inside the battery assembly 10. The support surface not only enhances the overall stability of the structure, but also effectively supports and limits the expansion deformation of the battery cell 1. The integrally formed design simplifies the production process, reducing assembly steps and the like in the production process. This not only reduces production costs, but also shortens the production cycle and improves production efficiency.

[0069] With reference to Figure 4In an embodiment, the insulating support 6 comprises two frame bodies 64 spaced along the X direction and connected to the first end surface 11, so that the overall stability of the support is enhanced by connecting the first end surface 11 to two frame bodies 64 spaced along the X direction. Each frame body 64 comprises a first connecting portion 641 between two adjacent pole columns 12 along the X direction, a second connecting portion 642 opposite to the first connecting portion 641 and located on a side away from the two adjacent pole columns 12 along the X direction, and a plurality of third connecting portions 643 spaced along the Y direction and between the first connecting portion 641 and the second connecting portion 642. The two ends of each connecting portion are connected to the first connecting portion 641 and the second connecting portion 642, respectively, so that the adjacent two third connecting portions 643, the first connecting portion 641 and the second connecting portion 642 jointly form a mounting hole 61. The third connecting portion 643 comprises a connecting arm 63. Since each frame body 64 is composed of the first connecting portion 641, the second connecting portion 642 and the plurality of third connecting portions 643, a stable frame structure is formed, and the structure is simple. In addition, the first connecting portion 641 and the second connecting portion 642 serve as the main support structure, and the third connecting portion 643 further reinforces the overall structure, thereby improving the rigidity and stability of the support. The clear layout of the first connecting portion 641, the second connecting portion 642 and the third connecting portion 643 (the connecting arm 63) makes the assembly process more intuitive and simple, and reduces the possibility of assembly errors.

[0070] It should be noted that the two frame bodies 64 can be separately arranged or integrally formed. Specifically, the present application does not limit this.

[0071] In an embodiment, each of the bar piece 2 and the insulating support 6 is further provided with a positioning structure, which includes a positioning protrusion and a positioning groove matched with the positioning protrusion, one of which is arranged on the bar piece 2 and the other of which is arranged on the insulating support 6. Thus, the use of the positioning protrusion and the positioning groove can ensure that the bar piece 2 can be accurately installed at the predetermined position of the insulating support 6 during assembly. Such accurate positioning reduces assembly errors and improves the accuracy and consistency of overall assembly. Through the locking effect of the positioning structure, the connection between the bar piece 2 and the insulating support 6 is more stable. The positioning protrusion is embedded in the positioning groove to form a mechanical lock, which effectively prevents the bar piece 2 from being displaced or falling off under the action of vibration or external force. The design of the positioning structure makes the assembly process more intuitive and simple. The operator only needs to align the positioning protrusion with the positioning groove and then gently push it in to complete the assembly, without the need for complex adjustment and calibration steps, thereby improving the assembly efficiency. Accurate assembly and stable connection help to improve the overall reliability of the product. The positioning structure ensures the close fit between the bar piece 2 and the insulating support 6, reducing the risk of failure and damage due to improper assembly or loose connection.

[0072] With reference to Figures 1 to 3 The battery assembly further includes a CCS integrated board 8 on which an FPC board for collecting temperature and voltage is integrated. The CCS integrated board 8 is installed between the two frame bodies 64. The CCS integrated board 8 integrates multiple functions such as electrical connection, temperature sampling, and voltage sampling. Installing the CCS integrated board 8 between the two frame bodies 64 can more effectively utilize the space inside the battery assembly 10. This layout not only saves valuable space resources but also helps to improve the energy density and overall performance of the battery assembly 10.

[0073] With reference to Figure 6 The bottom of the first connecting part 641 is provided with a groove 6411 for the CCS integrated board 8. Thus, the installation operation of the CCS integrated board 8 is simple through the provision of the groove 6411.

[0074] In an embodiment, the thickness of the pressing member 4 is L1 and the thickness of the pole 12 is L2, where 0 < L1 / L2 < 1. Thus, it is ensured that the pressing member 4 has sufficient strength to press multiple battery cells 1, so that the pressure exerted by the pressing member 4 on the first end surface 11 can suppress the expansion of the battery cells 1, reducing the relative displacement between the battery cells 1, thereby reducing the risk of loose or disconnected connection.

[0075] It should be noted that the ratio of the thickness of the pressing member 4 to the thickness of the pole 12 can also be 0.1, 0.2, 0.4, 0.5, 0.6, 0.8, 0.9, etc. Specifically, the ratio of the thickness of the pressing member 4 to the thickness of the pole 12 can be selected as needed, which is not limited in the present application.

[0076] In an embodiment, the thickness of the pressing member 4 is L1, and the pressure that the pressing member 4 can withstand is P. When 1 mm≤L1≤2 mm, the thickness of the pressing member 4 is in the range of 1 mm to 2 mm, which can ensure that the pressing member 4 is not easily deformed or damaged when pressure is applied, so that the pressing member 4 can provide stable pressing force, thereby better inhibiting the expansion of the battery cell 1. If the thickness of the pressing member 4 is greater than 2 mm, the weight and volume of the entire battery pack may be increased, which is not conducive to lightweight and small design. At the same time, the thickness of the pressing member 4 greater than 2 mm may increase the manufacturing cost. When the thickness of the pressing member 4 is less than 1 mm, the pressing member 4 may not be able to provide sufficient strength and rigidity, and is prone to deformation during pressing, thereby affecting the pressing effect. The pressure that the pressing member 4 can withstand satisfies 1 MPa≤P≤2 MPa, so that in this range, the pressing member 4 can exert sufficient pressure on the first end surface 11 to effectively inhibit the expansion of the battery cell 1, reduce the relative displacement between the battery cells 1, and thereby reduce the risk of loosening or disconnection of the connection part. When the pressure that the pressing member 4 can withstand is greater than 2 MPa, it may cause damage or deformation of the surface of the battery cell 1, and even affect the performance and service life of the battery cell 1. When the pressure that the pressing member 4 can withstand is less than 1 MPa, the pressing member 4 may not be able to effectively inhibit the expansion of the battery cell 1, resulting in an increase in the relative displacement between the battery cells 1, thereby increasing the risk of loosening or disconnection of the connection part.

[0077] It should be noted that the thickness of the pressing member 4 can be 1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.6 mm, 1.8 mm, 1.9 mm, or 2 mm, etc. Specifically, the thickness of the pressing member 4 can be selected as needed, which is not limited in the present application.

[0078] In an embodiment, the pressure per unit volume of the pressing member 4 applied to the first end surface 11 is F, wherein 0.02 MPA≤F≤2 MPA, so that setting a specific pressure range (0.02 MPA≤F≤2 MPA) can ensure that the pressing member 4 exerts stable and appropriate pressure on the first end surface 11 to effectively inhibit the expansion of the battery cell 1, reduce the relative displacement between the battery cells 1, and thereby reduce the risk of loosening or disconnection of the connection part, and in addition, it can also prevent excessive pressure from causing damage to the first end surface 11. When the pressure value is greater than 2 MPa, the pressing member 4 will exert excessive pressure on the first end surface 11, which will cause damage or deformation of the first end surface 11. When the pressure is less than 0.02 MPa, the pressing member 4 may not be able to effectively inhibit the expansion of the battery cell 1, resulting in an increase in the relative displacement between the battery cells 1, thereby increasing the risk of loosening or disconnection of the connection part.

[0079] It should be noted that the pressure per unit volume of the pressing member 4 to be applied to the first end surface 11 can be 0.02MPA, 0.04MPA, 0.05MPA, 0.08MPA, 0.1MPA, 0.12MPA, 0.13MPA, 0.15MPA, 0.19MPA, 0.2MPA, 0.22MPA, 0.28MPA, 0.3MPA, 0.4MPA, 0.5MPA, 0.6MPA, 0.72MPA, 0.9MPA, 1.1MPA, 1.3MPA, 1.5MPA, 1.7MPA, 1.9MPA, 2MPA, etc., and specifically, the pressure per unit volume of the pressing member 4 to be applied to the first end surface 11 can be selected as needed, which is not limited in the application.

[0080] With reference to Figure 7 The embodiment of the utility model also proposes a battery module 100, battery module 100 includes the battery assembly 10 as mentioned above, the specific structure of battery assembly 10 refers to the above embodiment, because the battery module 100 of the utility model adopts all the technical solutions of the above all embodiments, therefore at least has all the beneficial effects brought by the technical solutions of the above embodiments, here will not be repeated.

[0081] With reference to Figure 7 In an embodiment, a plurality of battery assemblies 10 are provided, and the plurality of battery assemblies 10 are arranged at intervals along the X direction. In this way, on the one hand, the energy density of the battery module is improved. On the other hand, since the battery assemblies 10 generate heat during operation, if the heat cannot be dissipated in time, the battery temperature will rise, thereby affecting the performance and service life of the battery. The design of interval arrangement can increase the heat dissipation space between the battery assemblies 10, which is conducive to heat dissipation and reduces the temperature rise of the battery assemblies 10. The design of interval arrangement can reduce the thermal coupling effect between the battery assemblies 10 and reduce the risk of fire or explosion caused by local overheating. At the same time, in the case of abnormal conditions such as short circuit and overcharge, interval arrangement helps to isolate the fault area and prevent the spread of faults. When a certain battery assembly 10 fails, the design of interval arrangement can facilitate maintenance personnel to quickly locate and handle the fault, reducing the impact on the entire battery module 100.

[0082] With reference to Figure 7, the battery module 100 further comprises a housing 20, the housing 20 is formed with a mounting cavity 201, a plurality of battery assemblies 10 are installed in the mounting cavity 201, and the battery module 100 further comprises a liquid cooling plate 30, the liquid cooling plate 30 is clamped between the plurality of battery assemblies 10 and the bottom of the mounting cavity 201, and the liquid cooling plate 30 is in thermal conductive connection with the plurality of battery assemblies 10. In this way, through the circulation of the cooling liquid in the liquid cooling system, the liquid cooling plate 30 can quickly absorb the heat generated by the plurality of battery assemblies 10, thereby maintaining the stability of the temperature of the plurality of battery assemblies 10 and reducing the performance degradation and shortening of the service life caused by high temperature. Stable battery temperature helps to reduce the thermal stress inside the plurality of battery assemblies 10 and avoid accelerated aging of the materials of the plurality of battery assemblies 10, thereby prolonging the overall service life of the plurality of battery assemblies 10. The liquid cooling plate 30 is directly integrated in the mounting cavity 201 of the housing 20, without the need for additional heat dissipation space, optimizing the overall structure of the battery module 100 and improving the space utilization, making the battery module 100 more compact. Compared with traditional air cooling or other heat dissipation methods, the liquid cooling system can reduce the need for additional heat dissipation elements such as fans and heat sinks, thereby reducing manufacturing costs. Due to the high heat dissipation efficiency of the liquid cooling system, the battery module 100 can maintain high working efficiency in a wider range of working conditions, thereby improving the energy efficiency ratio of the entire battery module 100. In addition, the pressing member 4 is suitable for applying pressure to the first end face 11, so that the battery assembly 10 and the liquid cooling plate 30 can always be in thermal conductive connection, realizing the effective cooling of the battery assembly 10 by the liquid cooling plate and improving the service life of the battery assembly 10.

[0083] With reference to Figure 7 In an embodiment, the plurality of battery assemblies 10 are fixedly bonded to the liquid cooling plate 30 by the fourth thermally conductive structural adhesive 54. In this way, the fourth thermally conductive structural adhesive 54 has excellent thermal conductivity, which can quickly transfer the heat generated by the battery assemblies 10 to the liquid cooling plate 30. This efficient heat conduction helps to maintain the temperature stability of the battery assemblies 10 and prevent performance degradation or safety hazards caused by local overheating. Through the bonding of the fourth thermally conductive structural adhesive 54, the close contact between the battery assemblies 10 and the liquid cooling plate can be ensured, thereby achieving uniform distribution of heat and reducing the temperature difference between the battery assemblies 10, improving the consistency and stability of the battery module 100. The fourth thermally conductive structural adhesive 54 not only has excellent thermal conductivity, but also has high bonding strength. It can firmly bond the battery assemblies 10 to the liquid cooling plate 30, preventing loosening or falling off under conditions such as vibration and impact, and ensuring the overall structural stability and reliability of the battery module 100. The thermally conductive structural adhesive also has a certain flexibility, which can absorb part of the energy when subjected to external force, reducing the impact on the battery assemblies 10 and protecting the battery assemblies from damage.

[0084] With reference to Figure 7In an embodiment, the plurality of battery assemblies 10 have gaps between the side walls of the mounting cavity, and the gaps are filled with foaming glue 40. After the foaming glue 40 fills the gaps, a continuous sealing layer is formed, which effectively prevents harmful substances such as dust, moisture, and humidity in the external environment from entering the inside of the battery module 100, thereby protecting the battery assemblies 10 from damage. The foaming glue 40 has good cushioning and shock absorption performance, and can absorb the vibration and impact that the battery module 100 receives during use or transportation, thereby protecting the battery assemblies 10 from mechanical damage. By filling the gaps, the foaming glue 40 can also enhance the stability of the battery assemblies 10 in the mounting cavity 201, and reduce loosening and displacement caused by vibration. Some foaming glue 40 (such as thermal insulation foaming glue 40) has certain heat conduction performance, which can assist in heat dissipation of the battery module 100 to a certain extent, thereby reducing the working temperature of the battery assemblies 10.

[0085] The above detailed description of the embodiments of the present application is provided, and the principles and implementation modes of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, the specific implementation modes and application ranges can be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A battery assembly, comprising: The utility model relates to a battery cell module and a battery cell module assembly method thereof. A plurality of battery cells are sequentially arranged along a Y direction, and each battery cell is provided with a pole at a first end surface in a Z direction. A plurality of buss bars are connected to one end of the poles away from the first end surface to connect the plurality of battery cells in series or in parallel. Each buss bar, the pole connected to the buss bar, and the first end surface jointly form a clamping groove.

2. The battery assembly of claim 1, wherein, The first end surface is provided with two poles, and the two poles are spaced apart along an X direction.

3. The battery assembly of claim 1, wherein, The clamping groove extends along the Y direction. The pressing member includes a plurality of first pressing strips spaced apart along the Y direction.

4. The battery assembly of claim 3, wherein, The first end surface and the first pressing strips are further provided with a second heat-conducting structural adhesive. The utility model further includes an insulating support mounted on the first end surface.

5. The battery assembly of any one of claims 1 to 4, wherein, The plurality of buss bars are connected to one end of the poles away from the first end surface through the plurality of mounting holes. The utility model further includes a third heat-conducting structural adhesive filled in the gap between the second side of the pole and the inner side wall of the mounting hole.

6. The battery assembly of claim 5, wherein, The pressing member includes a plurality of first pressing strips embedded in the clamping grooves.

7. The battery assembly of claim 5, wherein, The inner side wall of the mounting hole is provided with a pressing segment. The hardness of the first pressing strip is greater than that of the pressing segment.

8. The battery assembly of claim 7, wherein, The insulating support further includes a connecting arm between the two mounting holes along the Y direction.

9. The battery assembly of claim 7, wherein, The pressing member further includes a plurality of second pressing strips corresponding to the plurality of connecting arms. The plurality of second pressing strips are integrally formed with the plurality of first pressing strips.

10. The battery assembly of claim 9, wherein, The insulating support includes two frame bodies spaced apart along the X direction and connected to the first end surface.

11. The battery assembly of claim 9, wherein, Each frame body includes a first connecting portion between two adjacent poles along the X direction and extending along the Y direction. A second connecting portion is opposite to the first connecting portion and located on a side away from the two adjacent poles along the X direction. ​ A plurality of third connecting portions are arranged at intervals along the Y direction and between the first connecting portion and the second connecting portion, and two ends of each of the connecting portions are connected to the first connecting portion and the second connecting portion respectively, so that adjacent two third connecting portions, the first connecting portion and the second connecting portion jointly form the mounting hole, and the third connecting portion comprises the connecting arm.

12. The battery assembly of claim 5, wherein, Each of the bar piece and the insulating support is further provided with a positioning structure, the positioning structure comprises a positioning protrusion and a positioning groove matched with the positioning protrusion, one of the positioning protrusion and the positioning groove is arranged on the bar piece, and the other is arranged on the insulating support.

13. The battery assembly of any one of claims 1 to 4, wherein, The thickness of the compression member is L1, and the thickness of the pole is L2, wherein 0 < L1 / L2 < 1.

14. The battery assembly of any one of claims 1 to 4, wherein, The thickness of the compression member is L1, and the compression member can withstand a pressure of P, wherein 1mm ≤ L1 ≤ 2mm; and / or 1MPa ≤ P ≤ 2Mpa.

15. The battery assembly of any one of claims 1 to 4, wherein, The pressure applied by the compression member per unit volume to the first end surface is F, wherein 0.02MPA ≤ F ≤ 2MPA.

16. A battery module, comprising: The battery assembly comprises the battery assembly according to any one of claims 1 to 15.

17. The battery module of claim 16, wherein, A plurality of the battery assemblies are arranged at intervals along the X direction.

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