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. Comprising a plurality of sub-stacking body units and middle partition plates, the plurality of sub-stacking body units are stacked and separated by the middle partition plates, and each sub-stacking body unit comprises a plurality of battery core stacking bodies; the connecting beams are arranged at the two ends of the battery cell stacking body; 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 connecting beams located at the two ends of the corresponding battery cell stacking body and clamp and fix the battery cell stacking bodies during connection; wherein the middle partition plates are fixedly connected with the connecting beams in the sub-stacking body units located on the upper layers of the middle partition plates. Assembling is flexible, connection is reliable, the space utilization rate and the strength of the overall structure can be improved, cost is reduced, and quality is improved.

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 electricity is becoming more diversified, often requiring the combination of multiple battery cell stacks to meet power needs. Multiple battery cell stacks are generally laid out in a single layer and fixed by a frame, resulting in poor overall structural stability. Moreover, existing frames are difficult to adjust flexibly according to the number of battery cell stacks after forming, which easily leads to wasted space and increased costs, and is not conducive to improving space utilization. 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, battery pack and power device to solve the problems of poor overall structural stability, poor assembly flexibility and low space utilization of multiple cell stacks in the prior art, so as to improve the structural stability and space utilization of the cell assembly module, battery pack and power device.

[0004] To achieve the above and other related objectives, this utility model provides a battery cell assembly module, including multiple sub-stacked units and a middle partition. The multiple sub-stacked units are stacked and arranged in layers, and adjacent layers of sub-stacked units are separated by the middle partition. Each sub-stacked unit includes:

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

[0006] Multiple connecting beams are provided at both ends of each of the cell stacks distributed along the first direction;

[0007] Two side plate groups are distributed along the second direction on both sides of the cell stack. 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 connecting beams located at both ends of the corresponding cell stack and clamp and fix the cell stack when connected.

[0008] The intermediate partition is connected and fixed to the connecting beam in the sub-stack unit located above it.

[0009] Optionally, a plurality of the connecting beams in the upper sub-stack unit of two adjacent sub-stack units are formed on the intermediate partition plate between the two adjacent sub-stack units.

[0010] Optionally, the stacking direction of the plurality of sub-stacked body units is a third direction, and in the third direction, the side plate group located on the upper layer and the side plate group located on the lower layer are connected and locked together along the third direction by a first locking member.

[0011] Optionally, the stacking direction of the plurality of sub-stacked units is a third direction, in which the connecting beam located on the upper layer and the connecting beam located on the lower layer are connected and locked along the third direction by a second locking member.

[0012] Optionally, each of the sub-stack units has a connection tab, and the connection tabs of two adjacent sub-stack units are connected by a bridging bus.

[0013] Optionally, the connecting electrode tab is connected to a connecting electrode bus. One end of the bridging bus and the connecting electrode bus connected to the upper sub-stack unit are fixed to the connecting beam of the upper sub-stack unit through the same connecting electrode base. The other end of the bridging bus and the connecting electrode bus connected to the lower sub-stack unit are fixed to the side plate assembly of the lower sub-stack unit through another connecting electrode base.

[0014] Optionally, the sub-stack unit 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 corresponding to the side plate segment.

[0015] Optionally, the battery cell includes a pouch cell.

[0016] To achieve the above and other related objectives, this utility model also provides a battery pack, including the cell assembly module as described above.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] As described above, the battery cell module, battery pack, and power supply device of this utility model have at least the following beneficial effects: The detachable connection of multiple side plate segments to the connecting beam provides clamping force to fix the battery cell stack, making it less likely for the battery cell stack to detach and disperse. Furthermore, it allows for flexible adjustment of the number of side plate segments according to requirements, thus facilitating flexible adjustment of the accommodating space based on the number of battery cell stacks in each sub-stack unit. This flexible assembly improves space utilization and reduces costs. Based on this, the multi-layer sub-stack units are arranged in a compact layout, further improving space utilization, which in turn improves energy density and reduces costs. Adjacent sub-stack units are separated by intermediate partitions connected to the connecting beam, ensuring insulation performance while making the connection more reliable. This improves the overall structural strength and stability, thereby enhancing product quality. Attached Figure Description

[0021] Figure 1 This is a partial structural schematic diagram of an embodiment of the battery cell assembly module of this utility model;

[0022] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle;

[0023] Figure 3 for Figure 1 Exploded view of the core module of China Electronics Technology Group Corporation (CETC);

[0024] Figure 4 for Figure 1 Structural diagram of the connecting beam and the intermediate partition plate;

[0025] Figure 5 for Figure 1 A schematic diagram of the structure of the CNEDC cell module when the side panel assembly is removed;

[0026] Figure 6 for Figure 1 A first-person sectional view of the CEC module;

[0027] Figure 7 for Figure 1 A cross-sectional view of the CEC module from a second perspective;

[0028] Figure 8 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present invention;

[0029] Figure 9 for Figure 8 Exploded view of a portion of the battery pack structure;

[0030] Figure 10 This is a simplified structural diagram of an embodiment of the electrical device of this utility model.

[0031] Part Number Explanation

[0032] The battery cell module 100, battery cell stack 1, battery cell 11, connecting beam 2, second threaded hole 21, side plate assembly 3, side plate segment 31, first threaded hole 311, first locking member 32, third locking member 33, connecting pole base 41, connecting pole bus 42, bridging bus 43, output pole bus 44, output pole base 45, intermediate partition 5, slave control board 61, lower housing 7, upper cover 8, battery pack 200, vehicle 300, installation space 301. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] See Figures 1 to 3 and Figure 9In some optional embodiments, this utility model provides a cell assembly module 100, which includes multiple sub-stack units and a middle partition 5. The multiple sub-stack units are stacked and arranged in layers, and adjacent layers of sub-stack units are separated by the middle partition 5. Each sub-stack unit includes multiple cell stacks 1, multiple connecting beams 2, and two side plate groups 3. In addition to the above-mentioned components, the sub-stack unit may also include a connecting electrode base 41 and / or an output electrode bus 44 and / or an output electrode base 45 and / or a battery management system (BMS). Multiple cell stacks 1 of the same sub-stack unit are arranged along a first direction, and each cell stack 1 includes multiple cells 11 stacked along a second direction. The multi-layer sub-stack units are stacked along a third direction, and each layer of sub-stack units has connecting electrode tabs. Each cell stack 1 has connecting beams 2 arranged at both ends distributed along the first direction, that is, there are multiple connecting beams 2, and the multiple connecting beams 2 are distributed along the first direction. Two side plate groups 3 of the same sub-stack unit are distributed along the second direction on both sides of the cell stack 1. 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 distributed along the second direction are detachably connected to the connecting beams 2 located at both ends of the corresponding cell stack 1 distributed along the first direction, and clamp and fix the cell stack 1 during connection. That is, the side plate segments 31 located around the same cell stack 1 and the connecting beams 2 are connected and cooperate with each other to provide pre-tightening force to fix the cell stack 1, which helps to prevent the cell stack 1 from falling off and scattering. Adjacent sub-stack units are insulated and separated by a middle partition 5, and the middle partition 5 is connected and fixed to the connecting beam 25 in the upper sub-stack unit. The connection between the side plate segments 31 and the connecting beams 2 also allows the side plate segments 31 to be connected to the middle partition 5 through the connecting beams 2. The side plate segments 31, the connecting beams 2 and the middle partition 5 can be connected into a whole, which helps to improve the strength of the overall structure.

[0036] In this invention, the first direction, the second direction, and the third direction are perpendicular to each other. Specifically, the arrangement direction of multiple cell stacks 1 in the same sub-stack unit, the arrangement direction of multiple side plate segments 31 in each side plate group 3, the length direction of the side plate segments 31, the arrangement direction of 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 multiple cells 11 in each cell stack 1, the arrangement direction of the two side plate groups 3 corresponding to the same sub-stack unit, the length direction of the connecting beams 2, the width direction of the cell stack 1, the thickness direction of the cell 11, and the second direction are the same, i.e., the Y direction in the figures.

[0037] Optionally, the number of sub-stacked units is two, and the two sub-stacked units are stacked in two layers along a third direction.

[0038] Optionally, multiple side plate segments 31 within the same side plate group 3 of the same sub-stack unit 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. This assembly is simple and flexible, and the number of side plate segments 31 within the side plate group 3 can be increased or decreased according to the actual number of battery cell stacks 1 required, in order to meet different charge requirements and facilitate universal configuration. 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 connected and fixed by a third locking member 33, which includes bolts. The connection is simple, convenient, and reliable.

[0039] Optionally, each sub-stack unit has a connecting tab, and the connecting tabs of two adjacent sub-stack units are connected by a bridging bus 43, thereby realizing the series-parallel connection of two sub-stack units.

[0040] Optionally, the battery cell 11 includes a pouch cell, with tabs at both ends of the battery cell 11 distributed along the first direction. Alternatively, 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. Further, in each sub-stack unit, some of the battery cell 11 located on the side of the battery cell stack 1 in the first direction have tabs formed as connecting tabs. The connecting tabs of two adjacent sub-stack units are located on the same side of the battery cell assembly module 100 for connection via the bridging bus 43. The connecting beam 2 has a gap with the tab ends of the battery cell stack 1; that is, 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 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 two side plate segments 31 cooperate to clamp the sides with the largest surface area of ​​the cell 11, which helps to improve the stability of the overall structure.

[0041] Optionally, the top-level sub-stacking unit has an output electrode tab connected to an output bus 44. The output bus 44 is fixed to the connecting beam 2 of the top-level sub-stacking unit via an output electrode base 45. The output bus 44 is suitable for outputting the voltage of the cell assembly module 100. Furthermore, the output electrode tabs and connecting electrode tabs are distributed along a first direction on both sides of the sub-stacking unit. The output bus 44 connected to the output electrode tabs and the connecting bus 42 connected to the connecting electrode tabs are distributed along the first direction on both sides of the sub-stacking unit, resulting in a compact and reasonable layout that minimizes mutual interference.

[0042] In the above embodiment, the battery cell assembly module 100, with the side plate assembly 3 cooperating with the connecting beam 2, can provide a 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. 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 is convenient for flexible assembly according to the number of battery cell stacks 1, avoids space waste, and is conducive to improving space utilization and energy density, thereby helping to reduce costs. In addition, multiple sub-stack units are stacked and separated by the middle partition 5. This not only makes the layout compact, but also insulates and separates the sub-stack units of adjacent layers. The connecting beam 2 is connected and fixed to the middle partition 5, and the side plate assembly 3 is connected and fixed to the connecting beam 2. The mutual connection and fixation helps to improve the strength of the overall structure, thereby helping to improve product quality.

[0043] See 3 to Figure 7 In some alternative embodiments, multiple connecting beams 2 in the upper sub-stack unit of two adjacent sub-stack units are formed on the intermediate partition plate 5 between the two adjacent sub-stack units.

[0044] Optionally, the stacking direction of the multiple sub-stack units is a third direction. In the third direction, the side plate group 3 of the upper sub-stack unit and the side plate group 3 of the lower sub-stack unit are connected and locked along the third direction by a first locking member 32, which includes a bolt. Further, in the third direction, the side plate segment 31 of the upper sub-stack unit and the side plate segment 31 of the lower sub-stack unit have their orthographic projections in the third direction coincide. The side plate segment 31 is provided with a first threaded hole 311 that penetrates the side plate segment 31 along the third direction, and the first threaded hole 311 on the upper side plate segment 31 is aligned with the first threaded hole 311 on the lower side plate segment 31. The first locking member 32 passes through each layer of side plate segment 31 along the third direction and connects and locks each layer of side plate segment 31.

[0045] In this invention, the stacking direction of the multiple sub-stacked units, 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 attached figure.

[0046] Optionally, the stacking direction of the multiple sub-stacked units is a third direction. In the third direction, the connecting beam 2 of the upper sub-stacked unit and the connecting beam 2 of the lower sub-stacked unit are connected and locked along the third direction by a second locking member. Further, in the third direction, the orthographic projections of the connecting beam 2 of the upper sub-stacked unit and the connecting beam 2 of the lower sub-stacked unit in the third direction coincide. The connecting beam 2 is provided with a second threaded hole 21 that penetrates the connecting beam 2 along the third direction, and the second threaded hole 21 on the upper connecting beam 2 is aligned with the second threaded hole 21 on the lower connecting beam 2. The second locking member passes through each layer of connecting beam 2 along the third direction and connects and locks each layer of connecting beam 2, thereby achieving the connection and fixation between each layer of connecting beam 2, which is beneficial to further improve the strength of the overall structure.

[0047] Specifically, during the assembly process, after each cell stack 1 of the lower sub-stack unit is fixed by connecting the side plate section 31 to the connecting beam 2, the middle partition 5 is installed first, and then the upper sub-stack unit is assembled. The upper sub-stack unit and the middle partition 5 are assembled and placed together on top of the lower sub-stack unit. Then, the side plate section 31 of the upper sub-stack unit and the side plate section 31 of the lower sub-stack unit are connected and locked by the first locking member 32.

[0048] In the above embodiment, the battery cell module 100 has at least a portion of the connecting beam 2 and the middle partition 5 as an integral structure, which is reliable and helps to improve the strength of the overall structure. In addition, the side plate segments 31 of the side plate group 3 are connected to the connecting beam 2, and the upper and lower side plate segments 31 are connected and fixed, which is equivalent to the side plate segments 31 being indirectly connected to the middle partition 5. This allows multiple side plate groups 3, multiple connecting beams 2 and the middle partition 5 to be connected into a whole, which helps to improve the strength of the overall structure of the battery cell module.

[0049] See Figures 1 to 3 In some optional embodiments, the connecting electrode tab is connected to the connecting electrode bus 42. One end of the bridging bus 43 and the connecting electrode bus 42 connected to the upper sub-stack unit are fixed to the connecting beam 2 of the upper sub-stack unit through the same connecting electrode base 41. The other end of the bridging bus 43 and the connecting electrode bus 42 connected to the lower sub-stack unit are fixed to the side plate group 3 of the lower sub-stack unit through another connecting electrode base 41.

[0050] Optionally, in the third direction, the connection base 41 of the upper sub-stack unit is offset from the connection base 41 of the lower sub-stack unit in the second direction. Further, the bridging bus 43 includes a main body extending in the third direction, with both ends bent and extending in opposite directions in the second direction to form second connection portions. The two second connection portions are respectively connected and fixed to the two connection bases 41 of adjacent sub-stack units. Specifically, one end of the connection bus 42 overlaps with one of the second connection portions on the connection base 41 of the upper sub-stack unit and is locked to the corresponding connection base 41 by a fourth locking member. The other end of the connection bus 42 overlaps with another second connection portion on the connection base 41 of the lower sub-stack unit and is locked to the corresponding connection base 41 by a fourth locking member, which includes a bolt.

[0051] In the above embodiment, the battery cell module 100 has a connecting base 41 that provides installation support for the connecting bus 42 and the bridging bus 43, so that the connecting bus 42 and the bridging bus 43 can be connected and fixed, which helps to reduce assembly difficulty and improve assembly efficiency.

[0052] See Figure 9 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.

[0053] 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.

[0054] 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.

[0055] See Figure 1 , Figure 8 and Figure 9 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.

[0056] 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 containing 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 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 good cooling effect. The side plate groups 3 and connecting beams 2 of each sub-stack unit 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. Specifically, the first locking member 32 passes through the side plate section 31 and is then connected and locked to the lower housing 7.

[0057] 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.

[0058] For details, see Figure 9 During the assembly process, the side plate segment 31 of the side plate group 3 of each sub-stack unit 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 segment 31 and connected to the corresponding cell stack 1. Multiple sub-stack units are stacked and connected to complete the assembly of the cell assembly module 100. After the cell assembly module 100 is assembled, the assembled cell assembly module 100 is placed on the lower housing 7. The side plate segment 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.

[0059] 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.

[0060] 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.

[0061] 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 a power supply module for the vehicle 300. 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 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.

[0062] Optionally, the vehicle 300 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.

[0063] 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. The assembly is flexible, which is conducive to improving space utilization, increasing energy density, and reducing costs. In addition, the multiple sub-stack units are stacked in layers, and the layout is compact, which is conducive to improving the energy density of the battery. Furthermore, the sub-stack units of adjacent layers are separated by the intermediate partition 5 connected to the connecting beam 2, which is conducive to improving the overall structural strength and reducing the risk of mutual interference between the sub-stack units of adjacent layers, thus improving product quality.

[0064] 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.

[0065] 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, The sub-stacked units include multiple sub-stacked units and intermediate partitions. The multiple sub-stacked units are stacked and arranged in layers, with adjacent layers of sub-stacked units separated by the intermediate partitions. Each sub-stacked unit includes: Multiple battery cell stacks are arranged along a first direction, and each battery cell stack includes multiple battery cells stacked along a second direction. Multiple connecting beams are provided at both ends of each of the cell stacks distributed along the first direction; Two side plate groups are distributed along the second direction on both sides of the cell stack. 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 connecting beams located at both ends of the corresponding cell stack and clamp and fix the cell stack when connected. The intermediate partition is connected and fixed to the connecting beam in the sub-stack unit located above it.

2. The cell assembly module according to claim 1, characterized in that, In two adjacent sub-stacked units, a plurality of connecting beams in the upper sub-stacked unit are formed on the intermediate spacer between the two adjacent sub-stacked units.

3. The cell assembly module according to claim 1 or 2, characterized in that, The stacking direction of the multiple sub-stacked units is a third direction. In the third direction, the side plate group located on the upper layer and the side plate group located on the lower layer are connected and locked together along the third direction by a first locking member.

4. The cell assembly module according to claim 1 or 2, characterized in that, The stacking direction of the multiple sub-stacked units is a third direction. In the third direction, the connecting beam located on the upper layer and the connecting beam located on the lower layer are connected and locked along the third direction by a second locking member.

5. The cell assembly module according to claim 1, characterized in that, Each of the sub-stack units has a connection tab, and the connection tabs of two adjacent sub-stack units are connected by a bridging bus.

6. The cell assembly module according to claim 5, characterized in that, The connecting electrode tab is connected to a connecting electrode bus. One end of the bridging bus and the connecting electrode bus connected to the upper sub-stack unit are fixed to the connecting beam of the upper sub-stack unit through the same connecting electrode base. The other end of the bridging bus and the connecting electrode bus connected to the lower sub-stack unit are fixed to the side plate assembly of the lower sub-stack unit through another connecting electrode base.

7. The cell assembly module according to claim 1, characterized in that, The sub-stack unit 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 corresponding to the side plate segment.

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

9. A battery pack, characterized in that, Includes the cell assembly module as described in any one of claims 1 to 8.

10. The battery pack according to claim 9, 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.

11. An electrical appliance, characterized in that, Includes the cell assembly module as described in any one of claims 1 to 8.

12. The electrical appliance according to claim 11, 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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