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 the battery cell stacking bodies are provided with connecting pole lugs; a connecting beam; 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 corresponding connecting beams respectively and clamp and fix the battery cell stacking bodies during connection; the connecting electrode busbar is connected with the connecting electrode tab, and a part of the connecting electrode busbar is overlapped with a part of another connecting electrode busbar connected with the adjacent battery core stacking body to form an overlapped structure; and at least part of the connecting pole base can be telescopically adjusted so as to be in contact with the lap joint structure and fixedly connected with the lap joint structure. The side plate sections and the connecting beams are assembled flexibly, the space utilization rate can be improved, the connecting pole base can stretch out and draw back to eliminate installation gaps in the connecting pole busbar assembling process, and the assembling difficulty 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] Currently, with the increasingly widespread application of batteries, the demand for power is becoming more diversified. Multiple battery cell stacks are often combined to meet this demand, requiring consideration not only of space utilization but also of the reliability of the connections between the stacked cells. This is especially true for cell-to-pack (CTP) batteries, where stacked cells are connected in series and parallel via connecting busbars. During the overlapping of two connecting busbars, installation gaps can easily arise due to assembly tolerances in the overlapping direction, making it difficult to lock the connecting busbars securely. This affects the connection effect and consequently the reliability of the electrical connection between the stacked cells, hindering product quality improvement. 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 cell assembly module, a battery pack, and an electrical device to solve the problems of difficult electrical connection and poor connection reliability between cell stacks in the prior art.

[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 connecting electrode bus is provided, wherein the connecting electrode bus is connected to the connecting electrode tab, and a portion of the connecting electrode bus and a portion of another connecting electrode bus connected to the adjacent cell stack form an overlapping structure.

[0009] A connecting pole base is mounted on the connecting beam, and at least a portion of the connecting pole base is telescopically adjustable to contact and be fixedly connected to the overlapping structure.

[0010] Optionally, the two overlapping connecting busbars are partially bent towards each other to form an overlapping portion. The overlapping portions of the two connecting busbars are stacked in a third direction to form the overlapping structure. The overlapping structure and the connecting base are distributed along the third direction. At least a portion of the connecting base is adapted to be telescopically adjusted along the third direction to contact the overlapping structure and be connected and fixed by a first locking member.

[0011] Optionally, the connecting pole base includes a base body, a top cover, a floating locking member, and an elastic member. The elastic member is installed in the base body and connected to the floating locking member. The elastic member has an elastic force to drive the floating locking member to move along the third direction. The top end of the floating locking member extends out of the base body through the top cover to contact the overlapping structure and be connected and fixed to the first locking member.

[0012] Optionally, the top cover has an opening, the floating locking member has a limiting surface, the top end of the floating locking member extends out of the seat body through the opening, and the limiting surface abuts against the bottom surface of the top cover to limit the distance by which the top end of the floating locking member extends out of the seat body.

[0013] Optionally, the elastic element includes a spring, which is in a compressed state when the limiting surface abuts against the bottom surface of the top cover.

[0014] Optionally, the two overlapping connecting busbars are a first busbar and a second busbar, wherein the overlapping portion of the first busbar is farther away from the connecting base than the overlapping portion of the second busbar, and the hardness of the first busbar is less than that of the second busbar.

[0015] Optionally, the first locking element includes a bolt, and the floating locking element includes a nut, which is connected and locked to the bolt.

[0016] Optionally, the seat body is snapped and fixed to the connecting beam, and the top cover covers the top of the seat body and is snapped and fixed to the seat body.

[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. This not only makes the battery cell stack less likely to fall off and scatter during transportation, facilitating transportation, but also allows for flexible setting of the number of side plate segments according to requirements. This facilitates flexible adjustment of the space accommodating the battery cell stack based on its quantity, resulting in flexible assembly, improved space utilization, and reduced costs. Based on this, the overlapping connecting electrode busbars are fixed by connecting to a connecting electrode base with telescopic adjustment function. The connecting electrode base can telescopically adjust its contact with the connecting electrode busbar to eliminate installation gaps caused by assembly tolerances. This improves installation tolerance, reduces installation difficulty, and enhances the reliability of electrical connections between battery cell stacks, thereby improving product quality. Attached Figure Description

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

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

[0026] Figure 3 for Figure 1 A schematic diagram of the structure of the CNEDC cell module when the side panel assembly is removed;

[0027] Figure 4 for Figure 3 A magnified schematic diagram of part B in the middle;

[0028] Figure 5 for Figure 1 A partial connection diagram of the middle connecting bus and the connecting base from a first-view perspective;

[0029] Figure 6 for Figure 1 A partial connection diagram of the middle connecting bus and the connecting base from a second perspective;

[0030] Figure 7 for Figure 1 A partial sectional view of the connection between the intermediate connecting bus and the connecting base;

[0031] Figure 8 for Figure 1 A schematic diagram of the structure of the middle connecting pole base;

[0032] Figure 9 for Figure 8 An exploded view of the central connecting pole base;

[0033] Figure 10 This is a schematic diagram of the structure of an embodiment of the battery pack of this utility model.

[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, connecting beam 2, first mounting groove 21, side plate assembly 3, side plate segment 31, connecting electrode base 41, base 411, second mounting groove 4111, top cover 412, opening 4121, floating locking element 413, limiting surface 4131, elastic element 414, connecting electrode busbar 42, overlapping part 421, overlapping structure 422, first locking element 51, second locking element 52, third locking element 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 4 , Figure 9 and Figure 11In some optional embodiments, this utility model provides a cell assembly module 100, which includes multiple cell stacks 1, connecting beams 2, two side plate assemblies 3, connecting electrode bases 41, and connecting electrode busbars 42. In addition to the above components, the cell assembly module 100 may also include a battery management system (BMS). Multiple cell stacks 1 are arranged along a first direction, and each cell stack 1 has connecting electrode tabs 111. Each cell stack 1 includes multiple cells 11 stacked along a second direction. A connecting beam 2 is 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 a connecting beam 2 as needed. Providing a connecting beam 2 helps to further improve the stability of the corresponding cell stack 1 being clamped and fixed. Two side plate groups 3 are distributed on both sides of the cell stack 1 along the second direction. Each side plate group 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 connecting bus 42 is connected to the connecting tab 111 of the cell stack 1, and a portion of the connecting bus 42 and another connecting bus 42 connected to the adjacent cell stack 1 overlap to form an overlap structure 422. The two cell stacks 1 are connected through the connecting bus 42 to realize the series and parallel connection of the cell stacks 1. The connecting base 41 is installed on the connecting beam 2. At least a portion of the connecting base 41 can be telescopically adjusted to contact and be fixed with the overlap structure 422, so as to eliminate the installation gap between the connecting bus 42 and the connecting base 41 due to assembly tolerance, which is beneficial to improve the reliability of the connection and fixation between the connecting bus 42.

[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, two overlapping connecting busbars 42 are partially bent towards each other to form an overlapping portion 421. The overlapping portions 421 of the two connecting busbars 42 are stacked in a third direction to form an overlapping structure 422. The overlapping structure 422 and the connecting base 41 are distributed along a third direction. At least a portion of the connecting base 41 is adapted to telescopically adjust along a third direction to contact the overlapping structure 422 and be connected and fixed by a first locking member 51. Further, the first locking member 51 includes a bolt.

[0043] 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 section 31, the height direction of the cell 11, the stacking direction of the overlapping part 421 and the third direction are the same, namely the Z direction in the figure.

[0044] Optionally, 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 different charge requirements and facilitate universal setting. The side plate segment 31 can be an aluminum profile, injection molded part or die-cast part. The side plate segment 31 has a first connecting part corresponding to the connecting beam 2. The first connecting part and the connecting beam 2 can be locked and fixed by a second locking member 52, which includes bolts. The connection is simple, convenient and reliable.

[0045] Optionally, the battery cell 11 includes a pouch cell. Further, the two ends of the battery cell 11 distributed along the first direction have tabs, or in other words, the two ends of the battery cell stack 1 distributed along the first direction are tab ends, and some of the tabs of the battery cell 11 are formed as connecting tabs 111 of the battery cell stack 1. The connecting beam 2 has a gap with the tab ends of the battery cell stack 1, meaning the length of the side plate segment 31 is greater than the length of the battery cell stack 1, allowing the connecting beam 2 to avoid contact with the tab ends of the battery cell stack 1. This helps avoid squeezing the tab ends and affecting the performance of the battery cell stack 1, and also helps ensure insulation. The side plate segments 31 located on both sides of the same battery cell stack 1 cooperate to clamp and fix the battery cell stack 1 along the second direction. The two sides of the battery cell 11 distributed along the second direction are the sides with the largest surface area of ​​the battery cell 11. The two side plate segments 31 cooperating to clamp the sides with the largest surface area of ​​the battery cell 11 helps improve the stability of the overall structure.

[0046] 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 the multiple battery cells 11 of the battery cell stack 1 are not easy to fall off and scatter. No additional support plate is required to support the battery cell stack 1 to meet the transportation requirements, which helps to reduce production steps and reduce costs. Secondly, the side plate assembly 3 includes multiple independently set 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 and avoids space waste. This facilitates improved space utilization, battery energy density, and further cost reduction. Furthermore, the cell stacks 1 are connected in series and parallel via connecting busbars 42. The connecting busbars 42 contact and are fixed to the connecting base 41. At least a portion of the connecting base 41 is telescopic and has a floating adjustment function, allowing it to extend and float within a certain range to eliminate installation gaps with the connecting busbars 42. This reduces the difficulty of fixing the connecting busbars 42, ensuring a good connection effect and improving the reliability of the connections between the cell stacks 1, thereby enhancing product quality.

[0047] See Figures 3 to 9 In some alternative embodiments, the connecting pole base 41 includes a base body 411, a top cover 412, a floating locking member 413, and an elastic member 414. The elastic member 414 is installed inside the base body 411 and connected to the floating locking member 413. The elastic member 414 has an elastic force to drive the floating locking member 413 to move in a third direction. The top end of the floating locking member 413 extends out of the base body 411 through the top cover 412 to contact the overlapping structure 422 and be connected and fixed to the first locking member 51.

[0048] Optionally, the first locking member 51 includes a bolt, and the floating locking member 413 includes a nut, which is connected and locked to the bolt.

[0049] Optionally, the top cover 412 has an opening 4121, and the floating locking member 413 has a limiting surface 4131. The top end of the floating locking member 413 extends out of the seat body 411 through the opening 4121. The limiting surface 4131 abuts against the bottom surface of the top cover 412 to limit the distance by which the top end of the floating locking member 413 extends out of the seat body 411, which helps to prevent the floating locking member 413 from disengaging from the seat body 411 and to prevent the elastic force of the elastic member 414 from failing. Furthermore, the elastic member 414 includes a spring. When the limiting surface 4131 abuts against the bottom surface of the top cover 412, the spring is in a compressed state. The elastic member 414 is always in a compressed state within the telescopic adjustment range of the floating locking member 413, so that the elastic member 414 can continuously provide elastic force to act on the floating locking member 413, so that the floating locking member 413 can always maintain contact with the connecting busbar 42.

[0050] Optionally, the seat 411 is snapped and fixed to the connecting beam 2, and the top cover 412 covers the top of the seat 411 and is snapped and fixed to the seat 411. Furthermore, the top of the connecting beam 2 is provided with a first mounting groove 21, and the groove wall of the first mounting groove 21 is provided with a first locking groove. At least a part of the seat body 411 is installed in the first mounting groove 21, and the seat body 411 is provided with a first buckle corresponding to and engaging with the first locking groove. The seat body 411 is provided with a second locking groove, and the top cover 412 is provided with a second buckle corresponding to and engaging with the second locking groove. The seat body 411 is also provided with a second mounting groove 4111. At least a part of the floating locking member 413 and the elastic member 414 are located in the second mounting groove 4111. The two ends of the elastic member 414 abut against the bottom of the groove of the second mounting groove 4111 and the bottom end of the floating locking member 413, respectively. The floating locking member 413 can extend and retract upward under force so that the top end of the floating locking member 413 can extend out of the seat body 411 or retract into the seat body 411.

[0051] In the above embodiment of the battery cell module 100, the overlapping portions 421 of the two connected busbars 42 are stacked in the third direction. The extension and retraction adjustment direction of the floating locking member 413 is the same as the stacking direction of the two overlapping portions 421. The floating locking member 413 can not only move closer to the lower overlapping portion 421 under the action of the elastic member 414 to eliminate the installation gap, but also avoid excessive compression of the lower overlapping portion 421 to cause damage to the two overlapping portions 421. This helps to reduce the assembly difficulty and improve the assembly feasibility and product assembly quality.

[0052] See Figures 5 to 7 In some optional embodiments, the two overlapping connecting busbars 42 are respectively a first busbar and a second busbar. The overlapping portion 421 of the first busbar is farther away from the connecting base 41 than the overlapping portion 421 of the second busbar. The hardness of the first busbar is less than that of the second busbar. In other words, the hardness of the connecting busbar 42 with the overlapping portion 421 closer to the connecting base 41 is greater than the hardness of the connecting busbar 42 with the overlapping portion 421 farther away from the connecting base 41.

[0053] Optionally, the connecting bus 42 includes a copper bar. Further, one of the two connecting bus 42s with a difference in hardness is a soft copper bar, and the other is a hard copper bar.

[0054] Optionally, the connecting electrode base 41 includes a plastic base with insulating properties.

[0055] In the above embodiment of the battery pack module 100, the connecting bus 42 with the overlapping portion 421 located above is softer than the connecting bus 42 with the overlapping portion 421 located below. This is beneficial for the connecting bus 42 located far from the connecting base 41 to adaptively adjust its position and for the two connecting bus 42 to be connected and locked. Specifically, the connecting bus 42 with the overlapping portion 421 located above is farther from the connecting base 41 than the connecting bus 421 located below. It is more prone to deformation during the connection and locking process. Therefore, the connecting bus 42 with the overlapping portion 421 located above is softer and easier to deform, which is beneficial for the locking and fixing of the connecting bus 42.

[0056] See Figure 11 In some optional embodiments, the battery management system includes a main control board and a plurality of slave control boards 61, which are mounted and fixed on the side plate section 31 and electrically connected to the cell stack 1 corresponding to the side plate section 31.

[0057] 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 the multiple cells 11 in the cell stack 1. Furthermore, 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.

[0058] 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.

[0059] See Figure 10 and Figure 11 In some alternative embodiments, the present invention also provides a battery pack 200, which includes the cell assembly module 100 as described in any of the above embodiments.

[0060] 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. The side plate assembly 3 and 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.

[0061] 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.

[0062] For details, see Figure 11 During 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.

[0063] After the battery pack 200 and the cell assembly module 100 of the above embodiment are assembled, they can be directly installed on the lower housing 7 of the battery pack 200. 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] The battery cell module 100, battery pack 200, and electrical 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 number of side plate segments 31 can be flexibly set according to the number of battery cell stacks 1. The assembly is flexible, which helps to improve space utilization and reduce costs. In addition, the connecting electrode busbar 42, which is electrically connected to two battery cell stacks 1 respectively, is connected and fixed to the connecting electrode base 41, which has the ability to extend and float to achieve adjustment. This helps to eliminate installation gaps during the installation process, reduce the difficulty of connection and assembly, improve the reliability of connection and assembly, and thus improve product quality.

[0068] 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.

[0069] 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 connecting electrode bus is provided, wherein the connecting electrode bus is connected to the connecting electrode tab, and a portion of the connecting electrode bus and a portion of another connecting electrode bus connected to the adjacent cell stack form an overlapping structure. A connecting pole base is mounted on the connecting beam, and at least a portion of the connecting pole base is telescopically adjustable to contact and be fixedly connected to the overlapping structure.

2. The cell assembly module according to claim 1, characterized in that, Two overlapping connecting busbars are partially bent towards each other to form an overlapping portion. The overlapping portions of the two connecting busbars are stacked in a third direction to form the overlapping structure. The overlapping structure and the connecting base are distributed along the third direction. At least a portion of the connecting base is adapted to be telescopically adjusted along the third direction to contact the overlapping structure and be connected and fixed by a first locking member.

3. The battery cell module according to claim 2, characterized in that, The connecting pole base includes a base body, a top cover, a floating locking member, and an elastic member. The elastic member is installed in the base body and connected to the floating locking member. The elastic member has an elastic force to drive the floating locking member to move along the third direction. The top end of the floating locking member extends out of the base body through the top cover to contact the overlapping structure and be connected and fixed to the first locking member.

4. The cell assembly module according to claim 3, characterized in that, The top cover has an opening, the floating locking member has a limiting surface, the top end of the floating locking member extends out of the body through the opening, and the limiting surface abuts against the bottom surface of the top cover to limit the distance by which the top end of the floating locking member extends out of the body.

5. The cell assembly module according to claim 4, characterized in that, The elastic element includes a spring, which is in a compressed state when the limiting surface abuts against the bottom surface of the top cover.

6. The cell assembly module according to claim 3, characterized in that, The two connecting busbars that overlap are a first busbar and a second busbar. The overlapping portion of the first busbar is farther away from the connecting base than the overlapping portion of the second busbar. The hardness of the first busbar is less than that of the second busbar.

7. The cell assembly module according to claim 3, characterized in that, The first locking element includes a bolt, and the floating locking element includes a nut, which is connected and locked to the bolt.

8. The cell assembly module according to claim 3, characterized in that, The base is snapped and fixed to the connecting beam, and the top cover covers the top of the base and is snapped and fixed to the base.

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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