Battery cell group module, battery pack and power utilization device

Abstract

The utility model belongs to a battery cell group module, a battery pack and an electric device in the technical field of power batteries. The battery cell group module comprises a plurality of battery cell stacking bodies and a plurality of battery cell groups, wherein the battery cell stacking bodies are provided with connecting electrode tabs and comprise a plurality of battery cells; the connecting beams are arranged between every two adjacent battery cell stacking bodies; the two side plate groups are distributed on the two sides of the battery cell stacking bodies, each side plate group comprises a plurality of detachably connected side plate sections, and the side plate sections located on the two sides of the same battery cell stacking body are detachably connected with the two ends of the corresponding connecting beams respectively and can clamp the battery cell stacking bodies; the busbar bracket is arranged on the connecting beam; and the busbar is fixed on the busbar bracket and is connected with the connecting pole lug, and the busbar is connected with the other busbar connected on the adjacent battery core stacking body. And the busbar is directly positioned and assembled on the connecting beam through the busbar bracket to realize limiting and fixing, so that the assembly efficiency and the space utilization rate are improved, and the cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of power battery technology, and in particular relates to a cell assembly module, a battery pack and an electrical device. Background Technology

[0002] With the widespread application of battery technology, it is often necessary to combine multiple battery cell stacks to meet power demand. During the installation of battery cell stacks, not only the space utilization problem needs to be considered, but also the limiting and fixing of the battery cell stack tabs. Because the battery cell stack tabs are relatively soft, especially the tabs of pouch cells, they are prone to positional displacement during installation, making it difficult to limit and fix the busbar connected to the tabs. Busbar assembly and positioning are difficult, which is not conducive to improving assembly efficiency and reducing costs. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a battery cell module, battery pack and power device to solve the problems of busbar limiting and fixing difficulties in the prior art, so as to improve assembly efficiency, space utilization and reduce costs.

[0004] To achieve the above and other related objectives, this utility model provides a battery cell assembly module, comprising:

[0005] Multiple battery cell stacks are arranged along a first direction, each battery cell stack has connecting tabs, and each battery cell stack includes multiple battery cells stacked along a second direction.

[0006] A connecting beam is arranged between two adjacent battery cell stacks;

[0007] Two side plate groups are distributed on both sides of the cell stack along the second direction. Each side plate group includes multiple side plate segments distributed along the first direction and detachably connected. The side plate segments located on both sides of the same cell stack are detachably connected to the two ends of the corresponding connecting beam. The side plate segments can clamp and fix the cell stack when connected to the connecting beam.

[0008] A busbar support is located between the battery cell stack and the connecting beam, and is mounted on the connecting beam;

[0009] A busbar, which is fixed on the busbar bracket and connected to the connecting electrode tab, and is connected to another busbar connected to an adjacent cell stack.

[0010] Optionally, the battery cell module further includes a connecting electrode base, which is fixed on the connecting beam, and the busbars connected to the adjacent ends of two adjacent battery cell stacks are connected and fixed on the connecting electrode base.

[0011] Optionally, the top of the connecting beam is provided with a first positioning groove, and the connecting pole base is engaged and fixed with the first positioning groove.

[0012] Optionally, the connecting electrode base spans the connecting beam along the first direction and is connected to the busbar brackets located on both sides of the connecting beam as an integral structure, and the connecting electrode base is fixed to the connecting beam through the busbar brackets.

[0013] Optionally, the two busbars connecting two adjacent cell stacks are bent towards each other and placed on the connection electrode base and connected and fixed.

[0014] Optionally, the busbar has a first connecting portion, and at least a portion of the connecting electrode tab extends straight along the first direction to form a second connecting portion, the second connecting portion being connected and fixed to the first connecting portion.

[0015] Optionally, the second connecting portion is located between the first connecting portion and the side plate segment and is stacked with the first connecting portion in the second direction, and the side plate segment is provided with a welding clearance hole corresponding to the second connecting portion.

[0016] Optionally, the busbar bracket is riveted and / or embedded to the connecting beam.

[0017] Optionally, the cell assembly module further includes a battery management system, which includes multiple slave control boards. The slave control boards are mounted and fixed on the side plate segment, and the slave control boards are electrically connected to the cell stack body corresponding to the side plate segment.

[0018] Optionally, the battery cell includes a pouch cell.

[0019] To achieve the above and other related objectives, this utility model also provides a battery pack, including the cell assembly module as described above.

[0020] Optionally, the battery pack further includes an upper cover and a plate-shaped lower housing, the upper cover being sealed to the lower housing to define an installation space for accommodating the cell assembly module, the installation space being filled with coolant that immerses the cell stack.

[0021] To achieve the above and other related objectives, this utility model also provides an electrical device, including the battery cell assembly module as described above.

[0022] Optionally, the electrical device includes a vehicle, the bottom of which has an installation space, and the battery cell module is installed in the installation space.

[0023] As described above, the battery cell module, battery pack, and power supply device of this utility model have at least the following beneficial effects: multiple side plate segments are detachably connected to the connecting beam to provide clamping force for fixing the battery cell stack, which not only facilitates transportation but also allows for flexible setting of the number of side plate segments according to needs. This facilitates flexible adjustment of the space accommodating the battery cell stack based on the number of battery cell stacks, making assembly flexible and improving space utilization and reducing costs. Based on this, the busbar connected to the connecting electrode tabs of the battery cell stack is directly positioned and assembled on the connecting beam through the busbar bracket. This not only achieves the limiting and fixing of the busbar but also eliminates the need for additional support structures to support the busbar bracket, simplifying the structure and assembly process, which is conducive to improving assembly efficiency and further improving space utilization and reducing costs. Attached Figure Description

[0024] Figure 1 This is a partial structural schematic diagram of the battery cell assembly module of this utility model in Embodiment 1;

[0025] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle;

[0026] Figure 3 for Figure 1 A partial connection diagram of the central busbar, connecting electrode base, and connecting beam;

[0027] Figure 4 for Figure 1 A partially exploded view of the central busbar, connecting pole base, and connecting beam;

[0028] Figure 5 for Figure 1 A partial side view of the section connecting the pole tab and the side plate;

[0029] Figure 6 for Figure 1 A partial side view showing the connection between the central busbar, the connecting pole base, and the connecting beam;

[0030] Figure 7 for Figure 1 A partial sectional view from a first-person perspective of the connection status of the busbar, connecting pole base, and connecting beam;

[0031] Figure 8 for Figure 1 A partial sectional view from a second perspective of the connection status of the central busbar, connecting pole base, and connecting beam;

[0032] Figure 9This is a partial structural schematic diagram of the battery cell assembly module of this utility model, Embodiment 2;

[0033] Figure 10 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present invention;

[0034] Figure 11 for Figure 10 A schematic diagram of the explosion of the battery pack;

[0035] Figure 12 This is a simplified structural diagram of an embodiment of the electrical device of this utility model.

[0036] Part Number Explanation

[0037] The battery cell module 100, battery cell stack 1, battery cell 11, connecting electrode tab 111, second connecting part 1111, connecting beam 2, first positioning groove 21, positioning hole 22, snap-fit ​​groove 23, side plate assembly 3, side plate segment 31, fourth connecting part 311, welding clearance hole 312, second locking member 32, connecting electrode base 41, busbar 42, riveting hole 421, first connecting part 422, third connecting part 423, first locking member 43, busbar bracket 5, snap-fit ​​protrusion 51, positioning post 52, rivet 53, slave control board 61, lower box 7, upper cover 8, battery pack 200, vehicle 300, installation space 301. Detailed Implementation

[0038] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0039] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0040] See Figures 1 to 5 , Figure 9 and Figure 11In some optional embodiments, the present invention provides a cell assembly module 100, which includes multiple cell stacks 1, connecting beams 2, two side plate assemblies 3, busbar brackets 5, and busbars 42. In addition to the above-mentioned components, the cell assembly module 100 may also include a connecting electrode base 41 and / or a battery management system (BMS). Multiple cell stacks 1 are arranged along a first direction, and at least some of the cell stacks 1 have connecting electrode tabs 111. Each cell stack 1 includes multiple cells 11 stacked along a second direction. Connecting beams 2 are arranged between adjacent cell stacks 1. The number of connecting beams 2 can be multiple, and the multiple connecting beams 2 are distributed along the first direction. In the first direction, the side of the cell stack 1 located away from the adjacent cell stack 1 can be optionally provided with connecting beams 2 as needed. Providing connecting beams 2 helps to further improve the stability of the corresponding cell stack 1 being clamped and fixed. Two side plate assemblies 3 are distributed along the second direction on both sides of the cell stack 1. Each side plate assembly 3 includes multiple side plate segments 31 distributed along the first direction and detachably connected. The side plate segments 31 located on both sides of the same cell stack 1 are detachably connected to the two ends of the corresponding connecting beam 2. The side plate segments 31 can clamp and fix the cell stack 1 when connected to the connecting beam 2. The busbar bracket 5 is located between the cell stack 1 and the connecting beam 2 and is installed on the connecting beam 2. The busbar 42 is fixed on the busbar bracket 5 and connected to the connecting electrode tab 111 of the corresponding cell stack 1. The busbar 42 is also connected to another busbar 42 connected to the adjacent cell stack 1 to realize the series and parallel connection of adjacent cell stacks 1. The busbar 42 and the connecting electrode tab 111 of the cell stack 1 can be welded and fixed.

[0041] In this application, the first direction is perpendicular to the second direction. Specifically, the arrangement direction of the multiple cell stacks 1, the arrangement direction of the multiple side plate segments 31 in each side plate group 3, the length direction of the side plate segments 31, the arrangement direction of the multiple connecting beams 2, the length direction of the cell stack 1, and the length direction of the cell 11 are the same as the first direction, i.e., the X direction in the figures; the arrangement direction of the multiple cells 11 in each cell stack 1, the arrangement direction of the two side plate groups 3, the length direction of the connecting beams 2, the width direction of the cell stack 1, and the thickness direction of the cell 11 are the same as the second direction, i.e., the Y direction in the figures.

[0042] Optionally, cell 11 may include pouch cells.

[0043] Optionally, busbar 42 includes a copper busbar, and busbar bracket 5 includes a plastic bracket.

[0044] The battery cell assembly module 100 of the above embodiment, in cooperation with the side plate assembly 3 and the connecting beam 2, can provide pre-tightening force to clamp the battery cell stack 1 to achieve the fixation of the battery cell stack 1. The structure is stable and does not require additional support plates to support the battery cell stack 1, which can meet the transportation requirements, thus reducing production steps and lowering costs. In addition, the side plate assembly 3 includes multiple independently arranged side plate segments 31. The side plate segments 31 can be detachably connected to each other and to the connecting beam 2, which facilitates flexible assembly according to the number of battery cell stacks 1, avoids space waste, and helps to improve space utilization and efficiency. Firstly, it reduces costs. Secondly, the busbar 42, which is connected to the connecting tab 111 of the battery cell stack 1, is fixed to the connecting beam 2 by the busbar bracket 5. On the one hand, the connecting beam 2 can provide stable support for the busbar bracket 5, thereby limiting and fixing the busbar bracket 5, and thus limiting and fixing the busbar 42. The position of the busbar 42 is not easy to shift, the structure is stable, and it is beneficial to reduce the difficulty of assembly and positioning. On the other hand, the busbar bracket 5 is supported by the connecting beam 2, eliminating the need to set up a separate support structure to support the busbar bracket 5, simplifying the structure and further improving the space utilization rate.

[0045] See Figures 1 to 9 In some alternative embodiments, the connecting electrode base 41 is fixed on the connecting beam 2, and the busbar 42 connected to the adjacent ends of two adjacent cell stacks 1 is connected and fixed on the connecting electrode base 41.

[0046] Optionally, the connecting pole base 41 includes a plastic base, which is insulated and mounted on the connecting beam 2.

[0047] See Figures 1 to 8 In some alternative embodiments, the connecting pole base 41 is snapped and fixed to the connecting beam 2.

[0048] Optionally, the top of the connecting beam 2 is provided with a first positioning groove 21, and the connecting pole base 41 is snapped and fixed to the first positioning groove 21. Further, the connecting pole base 41 is provided with a buckle, and the groove wall of the first positioning groove 21 is provided with a slot that cooperates with the buckle. At least a part of the connecting pole base 41 extends into the first positioning groove 21 and is engaged with the slot by the buckle.

[0049] The battery cell module 100 in the above embodiment has a simple and convenient connection between the connecting electrode base 41 and the connecting beam 2.

[0050] See Figure 9 In some optional embodiments, the connecting pole base 41 spans the connecting beam 2 along the first direction and is connected to the busbar brackets 5 located on both sides of the connecting beam 2 as an integral structure, and the connecting pole base 41 is fixed to the connecting beam 2 by the busbar brackets 5.

[0051] In the above embodiment, the battery cell module 100 can fix the connecting electrode base 41 at the same time as the busbar bracket 5 and the connecting beam 2 are assembled and fixed, which helps to reduce assembly steps and improve assembly efficiency.

[0052] See Figure 1 , Figure 3 , Figure 4 , Figure 7 and Figure 8 In some alternative embodiments, the busbar bracket 5 is riveted and / or embedded to the connecting beam 2.

[0053] Optionally, the connecting beam 2 is provided with a positioning hole 22, and the busbar bracket 5 is provided with a positioning post 52. The positioning post 52 extends into the positioning hole 22 along the first direction and is positioned in conjunction with the positioning hole 22. The connecting beam 2 is provided with a snap-fit ​​groove 23, and the busbar bracket 5 is provided with a snap-fit ​​protrusion 51. The snap-fit ​​protrusion 51 extends into the snap-fit ​​groove 23 along the first direction and is embedded and snap-fitted into the snap-fit ​​groove 23. The snap-fit ​​protrusion 51 and the snap-fit ​​groove 23 are interference-fitted to achieve the limiting and fixing of the busbar bracket 5. Furthermore, the cross-section of the snap-fit ​​protrusion 51 is an isosceles trapezoid, and the snap-fit ​​groove 23 is an isosceles trapezoidal groove adapted to the shape of the snap-fit ​​protrusion 51, which facilitates the positioning and assembly of the snap-fit ​​protrusion 51 in the snap-fit ​​groove 23.

[0054] In the above embodiment, the connection between the busbar bracket 5 and the connecting beam 2 in the battery cell module 100 is simple, convenient and reliable. The connecting beam 2 provides stable support and limit for the busbar bracket 5, so that the busbar 42 is not easy to deviate, which helps to reduce the assembly difficulty and improve the assembly effect.

[0055] See Figure 3 and Figure 4 In some optional embodiments, the busbar bracket 5 and the busbar 42 can be riveted together. For example, the busbar bracket 5 is provided with rivets 53, and the busbar 42 is provided with rivet holes 421 corresponding to the rivets 53. The rivets 53 and the rivet holes 421 are riveted together to connect and fix the busbar 42 and the busbar bracket 5. The connection is simple and reliable.

[0056] See Figures 3 to 6 and Figure 8 In some alternative embodiments, the busbar 42 has a first connection portion 422, and at least a portion of the connecting tab 111 extends straight along a first direction to form a second connection portion 1111, the second connection portion 1111 being connected and fixed to the first connection portion 422.

[0057] Optionally, the second connecting part 1111 is located between the first connecting part 422 and the side plate section 31 and is stacked with the first connecting part 422 in the second direction. The side plate section 31 is provided with a welding clearance hole 312 corresponding to the second connecting part 1111. The welding clearance hole 312 provides clearance space for the welding operation of connecting electrode tab 111 and busbar 42, so that after the side plate section 31 is assembled with the connecting beam 2 to fix the battery cell stack 1, the welding operation of the second connecting part 1111 connecting electrode tab 111 and the first connecting part 422 of busbar 42 can be performed directly.

[0058] In the above embodiment, the connecting tabs 111 of the battery cell stack 1 can be directly welded and fixed to the busbar 42 without roll forming or bending, which helps to reduce the process flow, improve production efficiency and reduce costs.

[0059] See Figure 1 , Figure 2 , Figure 4 and Figure 7 In some optional embodiments, two busbars 42 connecting two adjacent cell stacks 1 are bent towards each other and placed on the connecting electrode base 41 and connected and fixed. Specifically, a third connecting portion 423 is formed by partially bending the two busbars 42 connecting two adjacent cell stacks 1 towards each other. The third connecting portions 423 of the two busbars 42 are stacked upwards in third direction. The two stacked third connecting portions 423 are placed on the connecting electrode base 41 and locked and fixed to the connecting electrode base 41 by a first locking member 43, which includes a bolt.

[0060] In this application, the height direction of the cell stack 1, the height direction of the connecting beam 2, the height direction of the side plate segment 31, the height direction of the cell 11 and the third direction are the same, namely the Z direction in the figure.

[0061] See Figures 1 to 4 In some optional embodiments, multiple side plate segments 31 of the same side plate group 3 correspond one-to-one with multiple battery cell stacks 1. That is, each battery cell stack 1 has an independent side plate segment 31 arranged on each side along the second direction. The assembly is simple and flexible, and the number of side plate segments 31 in the side plate group 3 can be increased or decreased according to the actual number of battery cell stacks 1 to meet the requirements of different charge capacities and facilitate universal setting. Among them, the connecting beam 2 located between two adjacent battery cell stacks 1 can correspond to two battery cell stacks 1 at the same time. The adjacent ends of two adjacent side plate segments 31 in the same side plate group 3 can be connected and fixed to the same connecting beam 2, sharing the same connecting beam 2, which helps to simplify the structure and improve the rigidity of the overall structure.

[0062] Optionally, the side plate segment 31 can be an aluminum profile, an injection-molded part, or a die-cast part. The side plate segment 31 has a fourth connecting part 311 corresponding to the connecting beam 2, and the fourth connecting part 311 is connected and locked to the connecting beam 2 by a second locking member 32. Further, the fourth connecting parts 311 of two adjacent side plate segments 31 in the same side plate group 3 are stacked to form an overlapping structure, and the second locking member 32 passes through the overlapping structure to connect and lock to the connecting beam 2. The second locking member 32 includes a bolt, and the connection is simple, convenient, and reliable.

[0063] Optionally, the two ends of the cell stack 1 distributed along the first direction have tabs, and there is a gap between the connecting beam 2 and the tabs of the cell stack 1. That is, the length of the side plate segment 31 is greater than the length of the cell stack 1, so that the connecting beam 2 does not contact the tabs of the cell stack 1. This is beneficial to avoid squeezing the tabs and affecting the performance of the cell stack 1, and also to ensure the insulation effect. Among them, some of the tabs are formed as connecting tabs 111. The side plate segments 31 located on both sides of the same cell stack 1 clamp and fix the cell stack 1 along the second direction. The two sides of the cell 11 distributed along the second direction are the sides with the largest surface area of ​​the cell 11. The two side plate segments 31 cooperate to clamp the sides with the largest surface area of ​​the cell 11, which helps to improve the stability of the overall structure.

[0064] See Figure 11 In some alternative embodiments, the battery management system includes a main control board and multiple slave control boards 61. The multiple slave control boards 71 ​​are mounted and fixed on the side plate section 31 and are electrically connected to the cell stack 1 corresponding to the side plate section 31.

[0065] Optionally, each side panel segment 31 is equipped with a slave control board 61, which is electrically connected to the corresponding cell stack 1 to diagnose and control the cell stack 1 based on the voltage signals of multiple cells 11 in the cell stack 1. Specifically, the main control board is connected to multiple slave control boards 61. The slave control boards 61 can acquire the voltage signals of the cells 11 through a flexible printed circuit (FPC), and the main control board diagnoses and controls each cell 11 separately through the multiple slave control boards 61.

[0066] The battery cell module 100 in the above embodiment can be assembled into a battery pack without a casing, so that it can be directly installed and used in the future, which helps to simplify the subsequent installation and use process.

[0067] See Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 7During assembly, the busbar bracket 5 and the connecting electrode base 41 are first fixed to the connecting beam 2, so that the busbar 42 installed on the corresponding busbar bracket 5 is positioned and fixed. Then, the side plate section 31 is connected to the connecting beam 2 to fasten multiple cells 11 in the cell stack 1, thereby clamping and fixing the cell stack 1. The connecting electrode tab 111 protrudes from the welding clearance hole 312 on the side plate section 31. The connecting electrode tab 111 is pressed to the busbar 42 by the welding pressure head tool, and welding is performed to weld and fix the connecting electrode tab 111 to the busbar 42. The side plate section 31, the busbar bracket 5, and the connecting electrode base 41 are all connected to the connecting beam 2. That is to say, the connecting beam 2 can serve as a positioning reference, which is conducive to the alignment of the busbar 42 with the welding clearance hole 312, which helps to reduce the alignment difficulty and thus facilitates the welding operation of the connecting electrode tab 111 to the busbar 42.

[0068] See Figure 10 and Figure 11 In some alternative embodiments, the present invention also provides a battery pack 200, including the cell assembly module 100 as described in any of the above embodiments.

[0069] Optionally, the battery pack 200 also includes an upper cover 8 and a plate-shaped lower housing 7. Side plate segments 31 are connected to the lower housing 7 to mount the cell stack 1 onto the lower housing 7. The upper cover 8 and the lower housing 7 are sealed together to define an installation space for accommodating the cell assembly module 100. The installation space is filled with coolant to immerse the cell stack 1. Furthermore, the outer shell formed by the connection of the upper cover 8 and the lower housing 7 has an inlet and an outlet. Coolant is filled into the installation space from the inlet until it flows out from the outlet, ensuring the installation space is completely filled. The cell stack 1 within the installation space is fully immersed in the coolant, achieving immersion cooling with good cooling effect. Additionally, the side plate assembly 3 and the connecting beam 2 in the cell assembly module 100 cooperate to fix the cell stack 1, eliminating the need for additional beam structures on the outer periphery of the plate-shaped lower housing 7 to secure the cell stack 1. This simplifies the structure, reduces weight, and lowers costs.

[0070] Optionally, the battery pack 200 contains only one cell module 100. The assembled cell module 100 can be directly installed into the lower casing 7 of the battery pack 200, simplifying the subsequent installation steps and making the installation simple and efficient.

[0071] For details, see Figure 11During the assembly process, the side plate section 31 of the side plate assembly 3 is connected to the connecting beam 2 to clamp and fix the corresponding cell stack 1. The slave control board 61 of the battery management system is fixed on the side plate section 31 and connected to the corresponding cell stack 1. After the cell assembly module 100 is assembled, the assembled cell assembly module 100 is placed on the lower housing 7. The side plate section 31 is connected and fixed to the lower housing 7 to fix the cell assembly module 100. The upper cover 8 is installed and sealed to the lower housing 7 to define the installation space. Coolant is poured into the installation space and the coolant immerses the cell stack 1 to achieve immersion cooling, thus completing the final assembly.

[0072] After the battery pack 200 and the cell assembly module 100 in the above embodiment are assembled, they can be directly installed on the lower housing 7 of the battery pack. It is not necessary to install the cell stack 1 and electrical structural components such as the control board 61 separately in the lower housing 7. The structure is simple and the installation operation is simple and convenient.

[0073] See Figure 1 and Figure 12 In some alternative embodiments, the present invention also provides an electrical device, including the battery cell module 100 as described in any of the above embodiments.

[0074] Optionally, the electrical device includes a vehicle 300, the bottom of which has an installation space 301. The battery cell module 100 is installed within the installation space 301 to form the vehicle's power supply module. Further, the vehicle 300 has a chassis with the installation space 301 within it. The battery cell module 100 can be connected to the chassis, allowing it to be directly installed within the chassis's installation space 301. This design is simple, compact, and improves space utilization. Specifically, the side plate segment 31 of the battery cell module 100 is connected to the chassis to secure the battery cell stack 1.

[0075] Optionally, the vehicle contains only one battery cell module 100. The assembled battery cell module 100 can be directly installed into the installation space 301 of the electrical device. The overall structure of the battery cell module 100 does not require secondary assembly, which simplifies the subsequent installation steps and makes the installation simple and efficient. In addition, the vehicle chassis protects the battery cell module 100, eliminating the need for an additional outer shell to protect it, which simplifies the structure and helps reduce costs.

[0076] The battery cell module 100, battery pack 200, and power supply device of this utility model are connected and cooperated by the side plate group 3 and the connecting beam 2 to secure the battery cell stack 1. The overall structure is stable and reliable. While meeting transportation requirements, the structure is simplified. Moreover, each side plate segment 31 of the side plate group 3 is independently detachable, and the side plate segments 31 can be flexibly set according to the number of battery cell stacks 1, which is flexible in assembly, which is conducive to improving space utilization and reducing costs. In addition, the busbar 42 connected to the connecting electrode tab 111 of the battery cell stack 1 is positioned and installed on the connecting beam 2 through the busbar bracket 5. The connecting beam 2 realizes the limiting and fixing of the busbar 42. The positioning of the busbar 42 is reliable and it is not easy to have position displacement, which is conducive to improving assembly efficiency and quality. It also eliminates the need for additional support structures, which helps to simplify the structure, improve space utilization, and reduce costs.

[0077] In the description of this specification, the references to terms such as "this embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0078] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A battery cell assembly module, characterized in that, include: Multiple battery cell stacks are arranged along a first direction, each battery cell stack has connecting tabs, and each battery cell stack includes multiple battery cells stacked along a second direction. A connecting beam is arranged between two adjacent battery cell stacks; Two side plate groups are distributed on both sides of the cell stack along the second direction. Each side plate group includes multiple side plate segments distributed along the first direction and detachably connected. The side plate segments located on both sides of the same cell stack are detachably connected to the two ends of the corresponding connecting beam. The side plate segments can clamp and fix the cell stack when connected to the connecting beam. A busbar support is located between the battery cell stack and the connecting beam, and is mounted on the connecting beam; A busbar, which is fixed on the busbar bracket and connected to the connecting electrode tab, and is connected to another busbar connected to an adjacent cell stack.

2. The cell assembly module according to claim 1, characterized in that, The cell assembly module also includes a connecting electrode base, which is fixed on the connecting beam. The busbars connected to the adjacent ends of two adjacent cell stacks are connected and fixed on the connecting electrode base.

3. The battery cell module according to claim 2, characterized in that, The top of the connecting beam is provided with a first positioning groove, and the connecting pole base is engaged and fixed with the first positioning groove.

4. The cell assembly module according to claim 2, characterized in that, The connecting electrode base spans the connecting beam along the first direction and is connected to the busbar brackets located on both sides of the connecting beam as an integral structure. The connecting electrode base is fixed to the connecting beam through the busbar brackets.

5. The cell assembly module according to claim 3 or 4, characterized in that, The two busbars connected to the two adjacent cell stacks are bent and folded towards each other and placed on the connecting electrode base and connected and fixed.

6. The cell assembly module according to claim 1, characterized in that, The busbar has a first connecting portion, and at least a portion of the connecting electrode tab extends straight along the first direction to form a second connecting portion, the second connecting portion being connected and fixed to the first connecting portion.

7. The cell assembly module according to claim 6, characterized in that, The second connecting part is located between the first connecting part and the side plate segment and is superimposed on the first connecting part in the second direction. The side plate segment has a welding clearance hole corresponding to the second connecting part.

8. The cell assembly module according to claim 1, characterized in that, The busbar bracket is riveted and / or embedded to the connecting beam.

9. The cell assembly module according to claim 1, characterized in that, The cell assembly module also includes a battery management system, which includes multiple slave control boards. The slave control boards are mounted and fixed on the side plate segment, and the slave control boards are electrically connected to the cell stack body corresponding to the side plate segment.

10. The cell assembly module according to claim 1, characterized in that, The battery cells include pouch cells.

11. A battery pack, characterized in that, Includes the cell assembly module as described in any one of claims 1 to 10.

12. The battery pack according to claim 11, characterized in that, The battery pack also includes an upper cover and a plate-shaped lower housing. The upper cover and the lower housing are sealed together to define an installation space for accommodating the battery cell assembly module. The installation space is filled with coolant that immerses the battery cell stack.

13. An electrical appliance, characterized in that, Includes the cell assembly module as described in any one of claims 1 to 10.

14. The electrical appliance according to claim 13, characterized in that, The electrical device includes a vehicle, the bottom of which has an installation space, and the battery cell module is installed in the installation space.

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