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, are provided with connecting electrode tabs, and comprise a plurality of battery cells arranged along a second direction; 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 in the second direction, each side plate group comprises a plurality of side plate sections which are distributed in the first direction and are detachably connected, 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 connecting beam respectively and clamp the battery cell stacking bodies when being connected with the connecting beam; a bridging busbar; and the connection electrode busbars are connected with the connection electrode tabs, the projections of the connection electrode busbars connected with the connection electrode tabs of part of two adjacent battery cell stacking bodies in the first direction are staggered, and the connection electrode busbars are connected through the bridging busbars. And the assembly is flexible, the creepage distance is increased, the space utilization rate and the safety 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 space utilization needs to be considered, but also electrical safety. In particular, the connecting busbars of the high-voltage connecting tabs of adjacent battery cell stacks are generally directly connected. The creepage distance is short during connection, which can easily lead to electrical safety accidents. 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 the high voltage connection tabs between adjacent battery cell stacks being close together, resulting in short creepage distance and low safety during connection, so as to improve space utilization and safety performance.

[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] Connect bus;

[0009] A connecting bus is connected to the connecting electrode tab, and the projections of the connecting bus corresponding to the connecting electrode tabs of at least two adjacent cell stacks are offset in the first direction, and are connected through the bridging bus.

[0010] Optionally, a portion of the cells in the same cell stack form a first sub-stack, and another portion of the cells form a second sub-stack. The first sub-stacks of two adjacent cell stacks are close to the same side plate group, and the second sub-stacks of two adjacent cell stacks are close to another side plate group. The connecting tabs include the first tab of the first sub-stack and the second tab of the second sub-stack. The first tab of the first sub-stack and the second tab of the second sub-stack in the same cell stack are respectively connected to the second tab of the second sub-stack and the first tab of the first sub-stack in adjacent cell stacks through the bridging bus.

[0011] Optionally, the number of cells in the two first sub-stacks of two adjacent cell stacks is not equal, and the number of cells in the two second sub-stacks of two adjacent cell stacks is not equal.

[0012] Optionally, the height direction of the connecting beam is a third direction, and in this third direction, the top of the connecting beam is lower than the top of the cell stack, and the bridging bus is fixed to the top of the connecting beam.

[0013] Optionally, the first tab and the second tab connected to the same bridging bus have opposite polarities, and the portion between the two ends of one of the bridging buses extends along the second direction across the other bridging bus and is spaced apart from the other bridging bus in the third direction.

[0014] Optionally, the battery cell module further includes an insulating component, and the portion between the two ends of the bridging bus is a bridging portion, which is covered by the insulating component.

[0015] Optionally, an insulating partition is provided between the first sub-stack and the second sub-stack of the same cell stack, and the connecting electrode bus is mounted on the insulating partition through a bus bracket.

[0016] Optionally, the battery cell module further includes a connecting electrode base, which is mounted on the connecting beam, and the connecting electrode busbar and the bridging busbar are connected and fixed to the connecting electrode base.

[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 projections of the connecting electrode busbars connected by the connecting electrode tabs of two adjacent battery cell stacks are staggered in the first direction, and the series and parallel connection of two adjacent battery cell stacks is achieved by bridging the busbars. This helps to increase the spacing between the connecting electrode busbars that need to be connected, thereby increasing the creepage distance and improving safety performance. Attached Figure Description

[0024] Figure 1 This is a partial structural schematic diagram of the battery pack of this utility model, Embodiment 1;

[0025] Figure 2 for Figure 1 A partially enlarged schematic diagram of the CEC module;

[0026] Figure 3 for Figure 1 Top view of the battery pack;

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

[0028] Figure 5 for Figure 1 Exploded view of a partial structure of the CEC module;

[0029] Figure 6 for Figure 1 A partial structural diagram showing the connection between the intermediate busbar, the connecting pole base, and the connecting beam;

[0030] Figure 7 for Figure 1 A simplified schematic diagram of the structure of the battery pack;

[0031] Figure 8 This is a schematic diagram of the structure of the battery pack in Embodiment 2 of this utility model;

[0032] Figure 9 for Figure 8 A schematic diagram of the explosion of the battery pack;

[0033] Figure 10 This is a simplified structural diagram of an embodiment of the electrical device of this utility model.

[0034] Part Number Explanation

[0035] The battery cell module 100, battery cell stack 1, battery cell 11, first sub-stack 12, first tab 121, second sub-stack 13, second tab 131, connecting beam 2, first positioning groove 21, side plate assembly 3, side plate segment 31, connecting electrode base 41, connecting electrode bus 42, bridging bus 43, bridging part 431, first locking member 44, insulating member 45, bus bracket 5, insulating partition 6, slave control board 71, lower housing 8, upper cover 9, battery pack 200, vehicle 300, installation space 301. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] See Figures 1 to 6 and Figure 9In some optional embodiments, the present invention provides a cell assembly module 100, which includes multiple cell stacks 1, two side plate assemblies 3, connecting beams 2, bridging busbars 43 and connecting electrode busbars 42; in addition to the above-mentioned components, the cell assembly module 100 may also include an insulating component 45 and / or a connecting electrode base 41 and / or a battery management system (BMS). Multiple battery cell stacks 1 are arranged along a first direction, and at least some of the battery cell stacks 1 have connecting tabs. Each battery cell stack 1 includes multiple battery cells 11 stacked along a second direction. A connecting beam 2 is arranged between two adjacent battery cell stacks 1. Two side plate groups 3 are distributed on both sides of the battery 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 battery 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 battery cell stack 1 when connected to the connecting beam 2. Connecting electrode busbars 42 are connected to the connecting tabs of the battery cell stack 1, and the projections of the connecting electrode busbars 42 connected to the connecting tabs of at least two adjacent battery cell stacks 1 are staggered in the first direction and connected by bridging busbars 43, thereby realizing the series and parallel connection of two adjacent battery cell stacks 1.

[0039] Optionally, there can be multiple connecting beams 2, distributed along the first direction. Further details can be found in [link to documentation]. Figure 1 In the first direction, the ends of the two side plate assemblies 3 are fastened together by straps. The straps are correspondingly positioned to the ends of the side plate assemblies 3. The straps are looped around the ends of the two side plate assemblies 3, causing the two side plate assemblies 3 to move towards each other and clamp the corresponding cell stack 1. This ensures the stability of the cell stack 1 being clamped without the need for end beams. Compared to end beams, the straps occupy less space and are lighter, which helps to improve space utilization and increase the energy density of the cell assembly module 100; or, see Figure 9 In the first direction, connecting beams 2 corresponding to the ends of the side plate groups 3 are also provided on both sides of the cell assembly module 100. That is, a connecting beam 2 forming an end beam is also arranged on the side of the cell stack 1 located away from its adjacent cell stack 1. The end beam corresponds to and connects with the ends of the side plate groups 3. The connecting beam 2 located between two adjacent cell stacks 1 forms an intermediate beam. The ends of the two side plate groups 3 are connected by the end beam, which helps to further improve the stability of the corresponding cell stack 1 being clamped and the rigidity of the overall structure. It can be understood that the ends of the two side plate groups 3 can be connected only by the end beam; or, the ends of the two side plate groups 3 can be fastened only by wrapping with straps; or, the ends of the two side plate groups 3 can be connected by both the end beam 2 and the straps can be provided to wrap and fasten the ends of the two side plate groups 3, further improving the stability of the overall structure.

[0040] 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 configuration. 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, and the adjacent ends of two adjacent side plate segments 31 on the same side can be connected and fixed to the same connecting beam 2, which helps to simplify the structure.

[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, the battery cell 11 has tabs, and some of the tabs of the battery cell 11 are formed as connecting tabs of the battery cell stack 1. Further, the battery cell 11 includes a pouch cell 11.

[0043] Optionally, the connecting bus 42 includes a copper bar.

[0044] Optionally, the bridging bus 43 includes copper bars.

[0045] In the above embodiment, the battery cell assembly module 100, with the side plate assembly 3 cooperating with the connecting beam 2, can provide pre-tightening force to clamp the battery cell stack 1 to fix 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 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 further reduce costs. Furthermore, the two connecting electrode busbars 42, which are respectively connected to the connecting electrode tabs of two adjacent battery cell stacks 1, have their projections staggered in the first direction and are electrically connected through the bridging busbar 43. This not only enables the series and parallel connection of adjacent battery cell stacks 1, but also helps to increase the creepage distance of the two connecting electrode tabs during electrical connection, thereby reducing the probability of electrical safety accidents and improving the safety performance of the battery cell assembly module 100.

[0046] See Figures 1 to 6 In some optional embodiments, a portion of the cells 11 of the same cell stack 1 form a first sub-stack 12, and another portion of the cells 11 form a second sub-stack 13. The first sub-stacks 12 of two adjacent cell stacks 1 are close to the same side plate group 3, and the second sub-stacks 13 of two adjacent cell stacks 1 are close to the other side plate group 3. That is, the arrangement direction of the first sub-stacks 12 and the second sub-stacks 13 of two adjacent cell stacks 1 is the same in the second direction. For example, the first sub-stacks 12 and the second sub-stacks 13 of two adjacent cell stacks 1 are arranged from left to right in the second direction, or from right to left in the second direction. The connecting tabs include the first tab 121 of the first sub-stack 12 and the second tab 131 of the second sub-stack 13. The first tab 121 of the first sub-stack 12 and the second tab 131 of the second sub-stack 13 in the same cell stack 1 are respectively connected to the second tab 131 of the second sub-stack 13 and the first tab 121 of the first sub-stack 12 in the adjacent cell stack 1 through the bridging bus 43; for example, two adjacent cell stacks 1 are the first cell stack and the second cell stack, respectively. The connection bus 42 connected to the first tab 121 of the first sub-stack 12 of the first cell stack is connected to the connection bus 42 connected to the second tab 131 of the second sub-stack 13 of the second cell stack through a bridging bus 43. The connection bus 42 connected to the second tab 131 of the second sub-stack 13 of the first cell stack is connected to the connection bus 42 connected to the first tab 121 of the first sub-stack 12 of the second cell stack through another bridging bus 43.

[0047] Optionally, the number of cells 11 in the two first sub-stacks 12 of two adjacent cell stacks 1 is not equal, and the number of cells 11 in the two second sub-stacks 13 of two adjacent cell stacks 1 is not equal. Further, the total number of cells 11 in each cell stack 1 can be equal. If the number of cells 11 in the first sub-stack 12 is greater than the number of cells 11 in the first sub-stacks 12 of the adjacent cell stacks 1, then the number of cells 11 in the second sub-stack 13 is less than the number of cells 11 in the second sub-stacks 13 of the adjacent cell stacks 1; or, if the number of cells 11 in the first sub-stack 12 is less than the number of cells 11 in the first sub-stacks 12 of the adjacent cell stacks 1, then the number of cells 11 in the second sub-stack 13 is greater than the number of cells 11 in the second sub-stacks 13 of the adjacent cell stacks 1. By adjusting the number of cells 11 in the first sub-stack 12 and the second sub-stack 13 of adjacent cell stacks 1, the connecting busbars 42 connected to each sub-stack can be distributed at intervals in the second direction, and the interval distance can be adjusted flexibly. This allows for staggered overlap between two connecting tabs through the bridging busbars 43, which helps to improve the creepage distance of each sub-stack when connected. In particular, compared with the layout where the connecting tabs of two adjacent cell stacks 1 are arranged facing each other and directly connected in the first direction, the creepage distance of adjacent cell stacks 1 when connected is increased, thus improving electrical safety.

[0048] See Figures 1 to 7 In some alternative embodiments, the height direction of the connecting beam 2 is the third direction. In the third direction, the top of the connecting beam 2 is lower than the top of the cell stack 1, and the bridging bus 43 is fixed to the top of the connecting beam 2.

[0049] 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.

[0050] Optionally, the bridging bus 43 is insulated and fixed to the top of the connecting beam 2 via the connecting electrode base 41, and the bridging bus 43 is insulated and fixed to the connecting beam 2. Further, the connecting electrode base 41 is mounted on the connecting beam 2, and the connecting electrode bus 42 and the bridging bus 43 are connected and fixed to the connecting electrode base 41. Specifically, the top of the connecting beam 2 is provided with a first positioning groove 21, at least a portion of the connecting electrode base 41 extends into the first positioning groove 21 and is engaged and fixed to the first positioning groove 21, one end of the connecting electrode bus 42 is electrically connected to the connecting electrode tab of the cell stack 1, and the other end of the connecting electrode bus 42 is bent and stacked on the connecting electrode base 41 along a third direction with one end of the bridging bus 43, and connected and fixed by a first locking member 44, which includes a bolt. The connection is simple, convenient, and reliable.

[0051] Optionally, the first tab 121 and the second tab 131 connected by the same bridging bus 43 have opposite polarities, and the portion between the two ends of one of the bridging bus 43 extends along the second direction across the other bridging bus 43 and is distributed at intervals with the other bridging bus 43 in the third direction. By reasonably allocating the positive and negative polarities of the battery cells 11, the bridging bus 43 can connect the two sub-stacks of two adjacent battery cell stacks 1 in series, and avoid cross contact with the other bridging bus 43. The layout is compact and helps to improve space utilization. Furthermore, the portion between the two ends of the bridging bus 43 is a bridging part 431, and an insulating element 45 is covered on the bridging part 431. The insulating element 45 covers the bridging part 431, which is beneficial for insulation. Specifically, one of the bridging bus 43 is Ω-shaped, and the other bridging bus 43 is I-shaped. The Ω-shaped bridging bus 43 crosses the I-shaped bridging bus 43 in the second direction.

[0052] Optionally, an insulating partition 6 is provided between the first sub-stack 12 and the second sub-stack 13 of the same cell stack 1, or in other words, an insulating partition 6 is provided between some adjacent cells 11 of the same cell stack 1. The connecting electrode bus 42 is mounted on the insulating partition 6 through the bus bracket 5. The bus bracket 5 includes a plastic bracket. The connecting electrode bus 42 can be riveted and fixed to the bus bracket 5. Since the material of the connecting electrode tab is relatively soft, it is difficult to provide stable installation support for the connecting electrode bus 42. The insulating partition 6 can provide installation support for the connecting electrode bus 42 through the bus bracket 5. The connecting electrode bus 42 is not easy to shake, which helps to reduce the connection difficulty between the connecting electrode bus 42 and the bridging bus 43. The insulating partition 6 is bonded and fixed to the cells 11 of the first sub-stack 12 and the cells 11 of the second sub-stack 13 of the same cell stack 1 on both sides in the second direction. Furthermore, in the first direction, the length of the insulating partition 6 is not less than the length of the insulating film of the cell 11; in the third direction, the width of the insulating partition 6 is not less than the maximum width of the electrode stack of the cell 11, which helps to ensure the insulation effect.

[0053] In the above embodiment, the battery pack module 100 is insulated and fixed to the connecting beam 2 via the bridging bus 43. This not only utilizes the unused space above the connecting beam 2 to improve space utilization, but also eliminates the need for additional components to support the bridging bus 43. This helps reduce the number of parts, simplify the structure, and further improve space utilization.

[0054] See Figure 9 In 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.

[0055] Optionally, each side panel segment 31 is equipped with a slave control board 71, 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 71. The slave control boards 71 ​​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 71.

[0056] 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.

[0057] See Figure 8 and Figure 9 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.

[0058] Optionally, the battery pack 200 also includes an upper cover 9 and a plate-shaped lower housing 8. A side panel 31 is connected to the lower housing 8 to mount the cell stack 1 onto the lower housing 8. The upper cover 9 and the lower housing 8 are sealed together to define an installation space containing the cell assembly module 100. The installation space is filled with coolant that immerses the cell stack 1. Furthermore, the outer casing formed by the connection of the upper cover 9 and the lower housing 8 has an inlet and an outlet. Coolant fills 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 excellent cooling effect. The gap between the connecting beam 2 and the top cover 9 provides space for the cross-connect busbar 43, which helps to make full use of the idle space and improve space utilization. In addition, the side plate group 3 and the connecting beam 2 in the battery cell module 100 work together to fix the battery cell stack 1, so that there is no need to set up extra beam structures on the outer periphery of the plate-shaped lower box 8 to fasten the battery cell stack 1, which helps to simplify the structure, reduce weight and reduce cost.

[0059] Optionally, the battery pack 200 contains only one cell module 100. The assembled cell module 100 can be directly installed into the lower casing 8 of the battery pack 200, simplifying the subsequent installation steps and making the installation simple and efficient.

[0060] For details, see Figure 9During 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 8. The side plate section 31 is connected and fixed to the lower housing 8 to fix the cell assembly module 100. The upper cover 9 is installed and sealed to the lower housing 8 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.

[0061] After the battery pack of the above embodiment is assembled, the cell assembly module 100 can be directly installed on the lower housing 8 of the battery pack. It is not necessary to install the cell stack 1 and electrical structural components such as the control board 71 separately in the lower housing 8. The structure is simple and the installation operation is simple and convenient.

[0062] See Figure 1 and Figure 10 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.

[0063] 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.

[0064] 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.

[0065] The battery cell module 100, battery pack, and power supply device of this utility model are secured by the connection and cooperation of the side plate group 3 and the connecting beam 2, resulting in a stable and reliable overall structure. While meeting transportation requirements, the structure is simplified. Moreover, each side plate segment 31 of the side plate group 3 is independently detachable, allowing for flexible arrangement of the side plate segments 31 according to the number of battery cell stacks 1. This flexible assembly helps to improve space utilization and reduce costs. In addition, the two connecting electrode busbars 42 connecting the connecting electrode tabs of two adjacent battery cell stacks 1 are distributed at intervals along the stacking direction of multiple battery cell stacks 1. This helps to separate and distance the high-voltage connecting electrode positions between battery cell stacks 1, thereby improving the creepage distance when connected by the bridging busbars 43, enhancing electrical safety, and thus improving the overall structural safety performance.

[0066] 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.

[0067] 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. Connect bus; A connecting bus is connected to the connecting electrode tab, and the projections of the connecting bus corresponding to the connecting electrode tabs of at least two adjacent cell stacks are offset in the first direction, and are connected through the bridging bus.

2. The cell assembly module according to claim 1, characterized in that, A portion of the cells in the same cell stack form a first sub-stack, and another portion of the cells form a second sub-stack. The first sub-stacks of two adjacent cell stacks are close to the same side plate group, and the second sub-stacks of two adjacent cell stacks are close to another side plate group. The connecting tabs include the first tab of the first sub-stack and the second tab of the second sub-stack. The first tab of the first sub-stack and the second tab of the second sub-stack in the same cell stack are respectively connected to the second tab of the second sub-stack and the first tab of the first sub-stack in adjacent cell stacks through the bridging bus.

3. The battery cell module according to claim 2, characterized in that, The number of cells in the two first sub-stacks of two adjacent cell stacks is not equal, and the number of cells in the two second sub-stacks of two adjacent cell stacks is not equal.

4. The cell assembly module according to claim 2, characterized in that, The height direction of the connecting beam is a third direction. In this third direction, the top of the connecting beam is lower than the top of the cell stack, and the bridging bus is fixed to the top of the connecting beam.

5. The cell assembly module according to claim 4, characterized in that, The first tab and the second tab connected to the same bridging bus have opposite polarities, and the portion between the two ends of one of the bridging buses extends along the second direction across the other bridging bus and is spaced apart from the other bridging bus in the third direction.

6. The cell assembly module according to claim 1 or 5, characterized in that, The battery cell module also includes an insulating component, and the portion between the two ends of the bridging bus is a bridging portion, which is covered by the insulating component.

7. The cell assembly module according to claim 2, characterized in that, An insulating partition is provided between the first sub-stack and the second sub-stack of the same cell stack, and the connecting electrode bus is mounted on the insulating partition through a bus bracket.

8. The cell assembly module according to claim 1, characterized in that, The battery cell module also includes a connecting electrode base, which is mounted on the connecting beam. The connecting electrode bus and the bridging bus are connected and fixed to the connecting electrode 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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