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 which are arranged along a first direction, each battery cell stacking body is provided with a tab, and each battery cell stacking body comprises a plurality of battery cells which are stacked along a second direction; the connecting beams are arranged between two adjacent battery cell stacking bodies; the two side plate groups are distributed on the two sides of the battery cell stacking bodies in the second direction, each side plate group comprises a plurality of side plate sections distributed in the first direction, 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 clamp the battery cell stacking bodies during connection; a plurality of busbar supports, wherein a part of the busbar supports are positioned and assembled on the side plate sections; and the plurality of busbars are arranged on the corresponding busbar brackets and are connected with the tabs. And the busbar is directly positioned and assembled on the side plate sections through the busbar bracket to realize limiting and fixing, so that the assembly efficiency is improved, the space utilization rate is 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 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] Multiple busbar brackets, some of which are positioned and assembled on the side plate section;

[0009] Multiple busbars are installed on corresponding busbar brackets and connected to the tabs.

[0010] Optionally, the battery cell module further includes a low-voltage output electrode base, which is mounted on the side plate segment. The electrode tabs of some of the battery cell stacks include low-voltage output electrode tabs. The busbar connected to the low-voltage output electrode tabs is a low-voltage output busbar. The low-voltage output busbar is mounted on the busbar bracket positioned and assembled with the side plate segment and is fixedly connected to the low-voltage output electrode base.

[0011] Optionally, the low-voltage output electrode base and the side plate section are locked and fixed by a first locking member.

[0012] Optionally, the side plate segment is provided with a first positioning groove and a locking hole. The low-voltage output electrode base includes a main body and a locking part. One end of the main body is positioned and installed in the first positioning groove. When the main body is assembled in place, the locking part is aligned with the locking hole and locked and fixed by the first locking member. The output end of the low-voltage output busbar is bent and fixed on the other end of the main body.

[0013] Optionally, the tabs of a portion of the cell stack include high-voltage output tabs, and the busbar connected to the high-voltage output tabs is a high-voltage output busbar; an insulating partition is arranged between two adjacent cells of the cell stack having the high-voltage output tabs, a portion of the busbar bracket is positioned and mounted on the insulating partition, and the high-voltage output busbar is mounted on the busbar bracket positioned and mounted with the insulating partition.

[0014] Optionally, the cell assembly module further includes a connecting electrode base, which is mounted on the connecting beam. The tabs of some of the cell stacks include connecting electrode tabs, and the busbar connected to the connecting electrode tabs is a connecting electrode busbar. The connecting electrode busbar is mounted on the busbar bracket positioned and assembled with the side plate segment, and two connecting electrode buses connected to the adjacent ends of two adjacent cell stacks are fixed and connected on the connecting electrode base.

[0015] Optionally, the top of the connecting beam is provided with a second positioning groove, the connecting electrode base is snapped and fixed with the second positioning groove, and the two connecting electrode busbars connected to the two adjacent battery cell stacks are bent and folded towards each other and placed on the connecting electrode base and fixed.

[0016] Optionally, the side plate segments located on both sides of the battery cell stack are clamped and fixed to the battery cell stack along the second direction, and the side plate segments are positioned and assembled with the busbar bracket along the second direction.

[0017] Optionally, the busbar bracket is snapped and / or riveted to the side plate segment.

[0018] Optionally, the side plate segment is provided with a snap-fit ​​groove, and the busbar bracket positioned on the side plate segment is provided with a snap-fit ​​protrusion. The snap-fit ​​protrusion extends into the snap-fit ​​groove along the second direction and snaps into the snap-fit ​​groove. And / or, the side plate segment is provided with a positioning hole, and the busbar bracket is provided with a positioning post. The positioning post extends into the positioning hole along the second direction to cooperate with the positioning hole for positioning.

[0019] Optionally, the sidewall of the side plate segment facing the cell stack is provided with an insulating film for insulatingly separating the side plate segment from the cell stack.

[0020] Optionally, the cell assembly module further includes a battery management system, which includes multiple slave control boards mounted on the side plate segment and electrically connected to the cell stack corresponding to the side plate segment.

[0021] Optionally, the battery cell includes a pouch cell.

[0022] To achieve the above and other related objectives, this utility model also provides a battery pack, including the cell assembly module as described above.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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 tabs of the battery cell stack is directly positioned and assembled on the side plate segment 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 install 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

[0027] Figure 1 This is a partial structural schematic diagram of an embodiment of the battery cell assembly module of this utility model;

[0028] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle;

[0029] Figure 3 for Figure 1 A magnified schematic diagram of part B in the middle;

[0030] Figure 4 for Figure 1 A partial connection diagram of the medium and low voltage output bus, the low voltage output electrode base, and the side plate section;

[0031] Figure 5 for Figure 1 A partial exploded view of the medium and low voltage output busbar, the low voltage output pole base, and the side plate section;

[0032] Figure 6 for Figure 1 A partial sectional view of the connection between the central busbar support and the side plate section;

[0033] Figure 7 for Figure 1 A partial connection diagram of the connecting busbar, connecting base, side plate section and connecting beam;

[0034] Figure 8 for Figure 1 A partially exploded view of the connecting busbar, connecting base, side plate section, and connecting beam;

[0035] Figure 9 for Figure 1 A magnified schematic diagram of part C in the middle;

[0036] Figure 10 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present invention;

[0037] Figure 11 for Figure 10 A schematic diagram of the explosion of the battery pack;

[0038] Figure 12 This is a simplified structural diagram of an embodiment of the electrical device of this utility model.

[0039] Part Number Explanation

[0040] The battery pack module 100, battery cell stack 1, battery cell 11, electrode tab 111, connecting beam 2, second positioning groove 21, side plate assembly 3, side plate segment 31, first connecting part 311, first positioning groove 312, snap-fit ​​groove 313, positioning hole 314, locking hole 315, second locking member 32, low-voltage output electrode base 41, main body 411, locking part 412, low-voltage output busbar 42, riveting hole 421, first locking member 43, connecting electrode base 44, connecting electrode busbar 45, third locking member 46, fourth locking member 47, high-voltage output electrode base 48, high-voltage output busbar 49, busbar bracket 5, snap-fit ​​protrusion 51, positioning post 52, riveting post 53, lower housing 6, slave control board 71, upper cover 8, insulating partition 9, battery pack 200, vehicle 300, installation space 301. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] See Figures 1 to 9In some optional embodiments, this utility model provides a cell assembly module 100, which includes multiple cell stacks 1, multiple busbar supports 5, multiple busbars, connecting beams 2, and two side plate assemblies 3. In addition to the above components, the cell assembly module may also include a low-voltage output electrode base 41 and / or a connecting electrode base 44 and / or a high-voltage output electrode base 48 and / or a battery management system (BMS). The multiple cell stacks 1 are arranged along a first direction, each cell stack 1 has a tab 111, and each cell stack 1 includes multiple cells 11 stacked along a second direction. Connecting beams 2 are arranged between adjacent cell stacks 1, and the number of connecting beams 2 can be multiple, distributed along the first direction. 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. Partial busbar brackets 5 are positioned and assembled on the side plate segments 31. Multiple buses are respectively installed on the corresponding busbar brackets 5 and connected to the tabs 111. The busbars and the tabs 111 can be welded and fixed. The busbars and the busbar brackets 5 can be riveted and fixed. For example, the busbar brackets 5 are provided with riveting posts 53, and the busbars are provided with riveting holes 421 corresponding to the riveting posts 53. The riveting posts 53 and the riveting holes 421 are riveted and fixed to connect and fix the busbars and the busbar brackets 5.

[0044] Optionally, cell 11 includes pouch cell 11.

[0045] 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.

[0046] 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 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, which helps to simplify the structure and improve the rigidity of the overall structure.

[0047] 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 first connecting part 311 corresponding to the connecting beam 2, and the first connecting part 311 is connected and locked to the connecting beam 2 by a second locking member 32. Further, the two first 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, which makes the connection simple, convenient, and reliable.

[0048] Optionally, the two ends of the cell stack 1 distributed along the first direction have tabs 111, and there is a gap between the connecting beam 2 and the tabs 111 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 111 of the cell stack 1. This helps to avoid squeezing the tabs 111 and affecting the performance of the cell stack 1, and also helps to ensure the insulation effect. The side plate segments 31 located on both sides of the same cell stack 1 cooperate to 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 cooperation of the two side plate segments 31 to clamp the sides with the largest surface area of ​​the cell 11 helps to improve the stability of the overall structure.

[0049] Optionally, the side plate segment 31 includes a metal plate, the busbar includes a copper bar, the busbar bracket 5 includes a plastic bracket, and an insulating film is provided on the side wall of the side plate segment 31 facing the cell stack 1 to insulate and separate the side plate segment 31 from the cell stack 1. The insulating film on the side plate segment 31 has an insulating protection function, which insulates and separates the side plate segment 31 from the busbar and the electrode 111, which helps to prevent arcing between the side plate segment 31 and the busbar and between the side plate segment 31 and the electrode 111.

[0050] 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 and fix the battery cell stack 1, thereby achieving the fixation of the battery cell stack 1. The structure is stable, and no additional support plate is required to support the battery cell stack 1 to meet the transportation requirements, which helps to reduce assembly steps and lower costs. In addition, the side plate assembly 3 includes multiple independently arranged side plate segments 31, and the side plate segments 31 and the connecting beam 2 can be detachably connected, which facilitates flexible assembly according to the number of battery cell stacks 1, avoids space waste, and is beneficial to This improves space utilization and further reduces costs. Furthermore, the busbar connected to the partial tabs 111 of the battery cell stack 1 is fixed to the side plate section 31 by the busbar bracket 5. On the one hand, the side plate section 31 can provide stable support for the busbar, realizing the limitation and fixation of the busbar. The position of the busbar is not easy to shift, the structure is stable, and it is conducive to reducing the difficulty of assembly positioning. On the other hand, by supporting the busbar by the side plate section 31, there is no need to set up a separate support structure to install the busbar bracket 5, which simplifies the structure and further improves space utilization, assembly efficiency and reduces costs.

[0051] See Figure 1 and Figure 11 In some optional embodiments, in the first direction, connecting beams 2 corresponding to the ends of the side plate group 3 are also provided on both sides of the battery cell module 100. That is, a connecting beam 2 forming an end beam is also arranged on the side of the battery cell stack 1 located away from its adjacent battery cell stack 1. The end beam corresponds to and is connected to the end of the side plate group 3. The connecting beam 2 located between two adjacent battery cell stacks 1 forms an intermediate beam. The ends of the two side plate groups 3 are connected by the end beam, which is beneficial to further improve the stability of the corresponding battery cell stack 1 being clamped and the rigidity of the overall structure.

[0052] Optional, see Figure 1 In the first direction, the ends of the two side plate assemblies 3 are fastened together by straps. Specifically, the straps are correspondingly set to the ends of the side plate assemblies 3. The straps are looped around the ends of the two side plate assemblies 3 so that the two side plate assemblies 3 move towards each other and clamp the corresponding cell stack 1. This can ensure the stability of the cell stack 1 being clamped without the need for end beams. Compared with end beams, the straps occupy less space and are lighter, which is beneficial to improving space utilization and increasing the energy density of the cell assembly module.

[0053] It is understandable that the ends of the two side plate groups 3 can be connected only by end beams; or, the ends of the two side plate groups 3 can be secured only by straps; or, the ends of the two side plate groups 3 can be connected by end beams and also secured by straps to further improve the stability of the overall structure.

[0054] See Figure 1 , Figure 2 , Figures 4 to 6 In some optional embodiments, the low-voltage output electrode base 41 is mounted on the side plate section 31, the electrode tab 111 of part of the cell stack 1 includes a low-voltage output electrode tab, the bus connected to the low-voltage output electrode tab is a low-voltage output bus 42, the low-voltage output bus 42 is mounted on the bus bracket 5 which is positioned and assembled with the side plate section 31, and is fixedly connected to the low-voltage output electrode base 41, and the low-voltage output bus 42 is suitable for outputting low voltage.

[0055] Optionally, the low-voltage output electrode base 41 and the side plate section 31 are locked together by a first locking member 43. Further, the first locking member 43 includes a bolt.

[0056] Optionally, the side plate segment 31 is provided with a first positioning groove 312 and a locking hole 315. The low-voltage output electrode base 41 includes a main body 411 and a locking part 412. One end of the main body 411 is positioned and installed in the first positioning groove 312. When the main body 411 is assembled in place, the locking part 412 is aligned with the locking hole 315 and locked and fixed by a first locking member 43. The output end of the low-voltage output busbar 42 is bent and fixed on the other end of the main body 411 and can be locked and fixed by a third locking member 46, which includes a bolt. Further, a portion of the main body 411 extends along the height direction of the side plate segment 31 to form the locking part 412. When one end of the main body 411 is assembled in place with the first positioning groove 312, the locking part 412 fits against the inner side wall of the side plate segment 31. One end of the first locking member 43 passes through the locking part 412 and locks and fixes itself to the side plate segment 31. The structure is stable and the connection is reliable.

[0057] 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 and the height direction of the cell 11 are the same, that is, the Z direction in the figure.

[0058] Specifically, during assembly, the low-voltage output electrode base 41 is fixed on the side plate section 31, and the low-voltage output busbar 42 is installed on the busbar bracket 5, which is positioned and assembled with the side plate section 31. The busbar bracket 5 provides positioning support for the low-voltage output busbar 42. The output end of the low-voltage output busbar 42 is locked and fixed to the low-voltage output electrode base 41 by the third locking member 46. After the side plate section 31 moves closer to the connecting beam 2 along the second direction and is assembled with the connecting beam 2, the connecting end of the low-voltage output busbar 42 is connected to the power supply. The low-voltage output electrode tabs of the cell stack 1 are welded and fixed. The low-voltage output bus 42, which is supported and fixed by the side plate section 31, is connected to the low-voltage output electrode base 41, which is also supported and fixed by the side plate section 31. The low-voltage output electrode base 41 and the low-voltage output bus 42 are not easy to shake or shift in position, which ensures the stability of the output end of the low-voltage output bus 42 when it is connected and fixed to the low-voltage output electrode base 41 by the third locking member 46. This is conducive to the stable output of low voltage of the cell stack 1.

[0059] In the above embodiment, the low-voltage output electrode base 41 and the busbar bracket 5 connected to the low-voltage output busbar 42 of the battery cell module 100 are fixed on the side plate section 31. The side plate section 31 provides support for the low-voltage output electrode base 41 and the busbar bracket 5, making it less likely for the low-voltage output electrode base 41 and the busbar to shift position. The structure is stable, which is conducive to the stable output of low voltage of the battery cell stack 1.

[0060] See Figure 1 and Figure 9 In some optional embodiments, the tabs 11 of a portion of the cell stack 1 include high-voltage output tabs, and the bus connected to the high-voltage output tabs is a high-voltage output bus 49; an insulating partition 9 is arranged between two adjacent cells 11 of the cell stack 1 with high-voltage output tabs, a partial bus support 5 is positioned and assembled on the insulating partition 9, and the high-voltage output bus 49 is installed on the bus support 5 positioned and assembled with the insulating partition 9, and the high-voltage output bus 49 is suitable for outputting high voltage.

[0061] Optionally, a portion of the insulating partition 9 is clamped and fixed between two adjacent cells 11 within the same cell stack 1, and another portion of the insulating partition 9 extends out between the two adjacent cells 11. The busbar bracket 5 corresponding to the high-voltage output busbar 49 is positioned and connected to the other portion of the insulating partition 9, so that the busbar bracket 5 is installed on the insulating partition 9 to provide positioning support for the high-voltage output busbar 49.

[0062] Optionally, the low-voltage output bus 42 and the high-voltage output bus 49 are located on opposite sides of the cell assembly module 100 in the first direction. The high-voltage output bus 49 is suitable for outputting high voltage, and the low-voltage output bus 42 is suitable for outputting low voltage. The same cell assembly module 100 can output both high and low voltage, which not only meets different usage scenarios but also makes the layout more compact, which is beneficial to improving space utilization and reducing costs.

[0063] Specifically, during the assembly process, the high-voltage output bus 49 is mounted on the insulating partition 9 via the bus bracket 5. The connecting end of the high-voltage output bus 49 is welded and fixed to the high-voltage output electrode tab. The insulating partition 9 provides support for the high-voltage output bus 49 to facilitate the welding operation between the high-voltage output bus 49 and the high-voltage output electrode tab. After the connecting end of the high-voltage output bus 49 is welded and fixed to the high-voltage output electrode tab, the output end of the high-voltage output bus 49 is then connected and fixed to the high-voltage output electrode base 48, which is beneficial for the high-voltage output bus 49 to stably output high voltage.

[0064] See Figure 1 , Figure 3 , Figures 6 to 8 In some optional embodiments, the connecting electrode base 44 is mounted on the connecting beam 2, the electrode tab 111 of part of the cell stack 1 includes the connecting electrode tab, the busbar connected to the connecting electrode tab is the connecting electrode busbar 45, the connecting electrode busbar 45 is mounted on the busbar bracket 5 which is positioned and assembled with the side plate section 31, and the two connecting electrode buses 45 connected to the adjacent ends of two adjacent cell stacks 1 are fixed and connected on the connecting electrode base 44 to realize the series and parallel connection of two adjacent cell stacks 1.

[0065] Optionally, the top of the connecting beam 2 is provided with a second positioning groove 21, and the connecting electrode base 44 is engaged and fixed with the second positioning groove 21. The two connecting electrode busbars 45 connecting two adjacent battery cell stacks 1 are bent and folded towards each other and placed on the connecting electrode base 44 and fixed by a fourth locking member 47. Further, the fourth locking member 47 includes a bolt.

[0066] Specifically, during the assembly process, the connecting electrode base 44 is fixed on the connecting beam 2, and the busbar bracket 5 corresponding to the connecting electrode busbar 45 is positioned and assembled on the side plate section 31. The busbar bracket 5 provides positioning support for the connecting electrode busbar 45. The side plate section 31 moves closer to the connecting beam 2 along the second direction and is assembled and connected to the connecting beam 2. After the side plate section 31 and the connecting beam 2 are assembled in place, the connecting end of the connecting electrode busbar 45 is welded and fixed to the connecting electrode tab of the cell stack 1. The output end of the connecting electrode busbar 45 is locked and fixed to the connecting electrode base 44 by the fourth locking member 47. The connecting electrode busbar 45, which is supported and fixed by the side plate section 31, is connected to the connecting electrode base 44, which is supported and fixed by the connecting beam 2. The connecting electrode base 44 and the connecting electrode busbar 45 are not easy to shake or shift in position, ensuring the stability of the connecting electrode busbar 45 and the connecting electrode base 44 when connected by the fourth locking member 47.

[0067] In the above embodiment, the cell assembly module 100 has a connecting electrode base 44 and a busbar bracket 5 connected to the connecting electrode busbar 45, which are respectively fixed on the connecting beam 2 and the side plate section 31. The connecting beam 2 and the side plate section 31 provide support for the connecting electrode base 44 and the busbar bracket 5, respectively. The connecting electrode base 44 and the connecting electrode busbar 45 are not prone to positional displacement, the structure is stable, and it is beneficial to the series and parallel connection between the cell stack 1.

[0068] See Figure 1 , Figure 5 , Figure 6 and Figure 8 In some alternative embodiments, the busbar bracket 5 is snapped and / or riveted to the side plate segment 31.

[0069] Optionally, the side plate section 31 is provided with a snap-fit ​​groove 313, and the busbar bracket 5 positioned and assembled on the side plate section 31 is provided with a snap-fit ​​protrusion 51. The snap-fit ​​protrusion 51 extends into the snap-fit ​​groove 313 along the second direction and engages with the snap-fit ​​groove 313 to snap and fix it.

[0070] Optionally, the side plate section 31 is provided with a positioning hole 314, and the busbar bracket 5 is provided with a positioning post 52. The positioning post 52 extends into the positioning hole 314 in the second direction to cooperate with the positioning hole 314 for positioning and guidance, so as to facilitate the engagement and locking between the locking protrusion and the locking groove 313.

[0071] In the above embodiment, the connection between the busbar bracket 5 and the side plate section 31 in the battery cell module 100 is simple, convenient and reliable. The side plate section 31 provides stable support and limit for the busbar bracket 5, so that the busbar is not easy to deviate, which helps to reduce the assembly difficulty and improve the assembly effect.

[0072] See Figure 11In some alternative embodiments, the battery management system includes a main control board and a plurality of slave control boards 71, 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.

[0073] Optionally, each side plate segment 31 is equipped with a slave control board 71, which is electrically connected to the cell stack 1 corresponding to the side plate segment 31, so as to diagnose and control the cell stack 1 according to the voltage signals of the multiple cells 11 in the cell stack 1.

[0074] The main control board is connected to multiple slave control boards 71. The slave control boards 71 ​​can collect the voltage signal of the battery cell 11 through a flexible printed circuit (FPC). The main control board diagnoses and controls each battery cell 11 through the multiple slave control boards 71.

[0075] The battery cell module in the above embodiment can be assembled into a battery pack device 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.

[0076] 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.

[0077] Optionally, the battery pack 200 also includes a plate-shaped lower housing 6 and an upper cover 8. The cell assembly module 100 is placed on the lower housing 6, and the upper cover 8 is sealed to the lower housing 6 to define an installation space for accommodating the cell assembly module 100. The installation space is filled with coolant that submerges the cell stack 1. Furthermore, the outer shell formed by the connection of the upper cover 8 and the lower housing 6 is provided with an inlet and an outlet. Coolant is filled into the installation space from the inlet until it flows out from the outlet, so that the coolant fills the installation space. The cell stack 1 in the installation space is completely submerged in the coolant, achieving immersion cooling with good cooling effect.

[0078] Specifically, 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 71 of the battery management system is fixed on the side plate section 31 and electrically 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 6. The side plate section 31 is connected and fixed to the lower housing 6 to fix the cell assembly module 100. The upper cover 8 is installed and sealed to the lower housing 6 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.

[0079] The battery pack 200 of the above embodiment, after the cell assembly module 100 is completed, can be directly installed on the lower housing 6 of the battery pack 200. The structure is simple and the installation operation is simple and convenient.

[0080] See 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.

[0081] Optionally, the electrical device includes a vehicle 300, the bottom of which has an installation space 301, and the battery cell module 100 is installed in the installation space 301 to form the vehicle's power supply module.

[0082] Optionally, the vehicle 300 has a chassis with an installation space 301. The battery cell module 100 can be connected to the chassis so that it can be directly installed in the installation space 301, resulting in a simple structure and compact layout, which is beneficial for improving space utilization. Furthermore, the side plate section 31 of the battery cell module 100 is connected to the chassis to fix the battery cell stack 1.

[0083] Optionally, the vehicle has only one battery cell module 100. The assembled battery cell module 100 can be directly installed into the installation space 301 of the vehicle 300. 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.

[0084] In the above embodiment, after the battery cell module 100 is assembled, it can be directly installed in the installation space 301 of the vehicle 300. The vehicle chassis protects the battery cell module 100, eliminating the need for an additional outer shell to protect the battery cell module 100. This simplifies the structure and helps reduce costs.

[0085] 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 connected to the tab 111 of the battery cell stack 1 is positioned and installed on the side plate segment 31 through the busbar bracket 5. The side plate segment 31 realizes the limiting and fixing of the busbar. The busbar positioning 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.

[0086] 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.

[0087] 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 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. Multiple busbar brackets, some of which are positioned and assembled on the side plate section; Multiple busbars are installed on corresponding busbar brackets and connected to the tabs.

2. The cell assembly module according to claim 1, characterized in that, The cell assembly module also includes a low-voltage output electrode base, which is mounted on the side plate section. Some of the cell stacks have low-voltage output electrode tabs. The busbar connected to the low-voltage output electrode tab is a low-voltage output busbar. The low-voltage output busbar is mounted on the busbar bracket positioned and assembled with the side plate section and is fixedly connected to the low-voltage output electrode base.

3. The battery cell module according to claim 2, characterized in that, The low-voltage output electrode base and the side plate section are locked and fixed by the first locking member.

4. The cell assembly module according to claim 3, characterized in that, The side plate section is provided with a first positioning groove and a locking hole. The low-voltage output electrode base includes a main body and a locking part. One end of the main body is positioned and installed in the first positioning groove. When the main body is assembled in place, the locking part is aligned with the locking hole and locked and fixed by the first locking member. The output end of the low-voltage output busbar is bent and fixed on the other end of the main body.

5. The cell assembly module according to claim 1, characterized in that, The electrode tabs of a portion of the cell stack include high-voltage output electrode tabs, and the busbar connected to the high-voltage output electrode tabs is a high-voltage output busbar; an insulating partition is arranged between two adjacent cells of the cell stack having the high-voltage output electrode tabs, a portion of the busbar bracket is positioned and mounted on the insulating partition, and the high-voltage output busbar is mounted on the busbar bracket positioned and mounted with the insulating partition.

6. The cell assembly module according to claim 1, characterized in that, The cell assembly module also includes a connecting electrode base, which is mounted on the connecting beam. The tabs of some of the cell stacks include connecting electrode tabs. The busbar connected to the connecting electrode tabs is a connecting electrode busbar. The connecting electrode busbar is mounted on the busbar bracket that is positioned and assembled with the side plate section. Two connecting electrode buses connected to the adjacent ends of two adjacent cell stacks are fixed and connected on the connecting electrode base.

7. The cell assembly module according to claim 6, characterized in that, The top of the connecting beam is provided with a second positioning groove, and the connecting electrode base is snapped and fixed with the second positioning groove. The two connecting electrode busbars connected to the two adjacent battery cell stacks are bent and folded towards each other and placed on the connecting electrode base and fixed.

8. The cell assembly module according to claim 1, characterized in that, The side plate segments located on both sides of the battery cell stack are clamped and fixed to the battery cell stack along the second direction, and the side plate segments are positioned and assembled with the busbar bracket along the second direction.

9. The cell assembly module according to any one of claims 1 to 8, characterized in that, The busbar bracket is fixed to the side plate section by snap-fit ​​and / or riveting.

10. The cell assembly module according to claim 9, characterized in that, The side plate segment is provided with a snap-fit ​​groove, and the busbar bracket, which is positioned and assembled on the side plate segment, is provided with a snap-fit ​​protrusion. The snap-fit ​​protrusion extends into the snap-fit ​​groove along the second direction and snaps into the snap-fit ​​groove. And / or, the side plate segment is provided with a positioning hole, and the busbar bracket is provided with a positioning post. The positioning post extends into the positioning hole along the second direction to cooperate with the positioning hole for positioning.

11. The cell assembly module according to claim 1, characterized in that, An insulating film is provided on the side wall of the side plate segment facing the cell stack to insulate and separate the side plate segment from the cell stack.

12. 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 multiple slave control boards are mounted on the side plate segment and electrically connected to the cell stack body corresponding to the side plate segment.

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

14. A battery pack, characterized in that, Includes the cell pack module as described in any one of claims 1 to 13.

15. The battery pack according to claim 14, 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.

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

17. The electrical appliance according to claim 16, 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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