Module assembly, battery pack and electric device

Abstract

The application provides a module assembly, a battery pack and a power utilization device. The module assembly comprises two battery modules and a BMU assembly. The two battery modules are oppositely arranged along a first direction, and a containing space is formed between the two battery modules. The BMU assembly is arranged in the containing space and connected to the two battery modules. Two module assemblies are oppositely arranged, and the containing space between the modules can be used to place the BMU, so as to improve the utilization rate of the space resource of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a module assembly, a battery pack, and an electrical device. Background Technology

[0002] In related technologies, the electrical architecture of battery packs is mostly arranged in a single branch, which means that the space inside the battery pack has not been effectively utilized. Utility Model Content

[0003] Embodiments of this application provide a module assembly, battery, and power device that can improve the technical problem of low space utilization efficiency in battery packs.

[0004] In a first aspect, this application provides a module component, the module component comprising:

[0005] Two battery modules;

[0006] The two battery modules are arranged opposite each other along a first direction, and an accommodating space is formed between the two battery modules;

[0007] The BMU component is disposed within the accommodating space and connected to the two battery modules.

[0008] In some embodiments, the two battery modules include a first battery module and a second battery module, wherein the first battery module includes a plurality of first battery cells and the second battery module includes a plurality of second battery cells;

[0009] Multiple first battery cells are arranged sequentially along a second direction, and multiple second battery cells are arranged sequentially along a second direction, which is different from the first direction.

[0010] In some embodiments, the BMU component includes a first BMU group and a second BMU group;

[0011] The first BMU group and the second BMU group are arranged along a first direction, the first BMU group is connected to the first battery module, and the second BMU group is connected to the second battery module.

[0012] In some embodiments, the first BMU group includes a plurality of first BMUs, and the plurality of first BMUs are arranged sequentially along a second direction;

[0013] The second BMU group includes multiple second BMUs, which are arranged sequentially along the second direction.

[0014] In some embodiments, along a first direction, a plurality of first battery cells of the first battery module and a plurality of second battery cells of the second battery module are symmetrically arranged, and a plurality of first BMUs of the first BMU group and a plurality of second BMUs of the second BMU group are symmetrically arranged.

[0015] In some embodiments, the module assembly further includes a first low-voltage acquisition harness and a second low-voltage acquisition harness;

[0016] One end of the first low-voltage acquisition harness is connected to one of the first BMU groups, and the other end of the first low-voltage acquisition harness is connected to the first battery module.

[0017] One end of the second low-voltage acquisition harness is connected to a second BMU group, and the other end of the second low-voltage acquisition harness is connected to a second battery module.

[0018] In some embodiments, each of the first battery cells includes a stacked first sub-battery cell and a second sub-battery cell, and the module assembly further includes a first connecting bar connected between the first sub-battery cell and the second sub-battery cell;

[0019] Each of the second battery cells includes a third sub-battery cell and a fourth sub-battery cell stacked together. The module assembly also includes a second connecting bar connected between the third sub-battery cell and the fourth sub-battery cell.

[0020] In some embodiments, the first sub-battery unit includes a first extension that extends beyond the second sub-battery unit and protrudes near the second battery module, and the third sub-battery unit includes a second extension that extends beyond the fourth sub-battery unit and protrudes near the first battery module.

[0021] A receiving space is formed between the second sub-unit, the fourth sub-unit, the first extension, and the second extension, and the BMU assembly is mounted in the receiving space. In some embodiments, the module assembly further includes a first jumper bar, which connects between the first sub-battery unit of one first battery unit and the second sub-battery unit of another first battery unit;

[0022] The module assembly further includes a second bridge bar connected between the third sub-cell of one second battery cell and the fourth sub-cell of another second battery cell.

[0023] In some embodiments, the module assembly further includes a connector mounting panel mounted within the accommodating space and extending from the first battery module to the second battery module.

[0024] In some embodiments, the module assembly further includes a first high-voltage connector and a second high-voltage connector, one end of the first high-voltage connector is connected to a first sub-battery unit located at the beginning end, and the other end of the first high-voltage connector is connected to a connector mounting panel; one end of the second high-voltage connector is connected to a second sub-battery unit located at the end end, and the other end of the second high-voltage connector is connected to a connector mounting panel.

[0025] The module assembly also includes a third high-voltage connector and a fourth high-voltage connector. One end of the third high-voltage connector is connected to the third sub-battery unit located at the first end, and the other end of the fourth high-voltage connector is connected to the connector mounting panel. One end of the third high-voltage connector is connected to the fourth sub-battery unit located at the end, and the other end of the fourth high-voltage connector is connected to the connector mounting panel.

[0026] In some embodiments, the module assembly further includes a plurality of low-voltage communication harnesses connected between the BMU assembly and the connector mounting panel.

[0027] In some embodiments, the length of the accommodating space is between 36% and 40% of the height of the module assembly, and / or;

[0028] The depth of the accommodating space is between 9% and 13% of the height of the module component.

[0029] In some embodiments, the volume of the accommodating space accounts for 3%-5% of the volume of the module assembly.

[0030] Secondly, this application also provides a battery pack, including the module assembly as described above.

[0031] Thirdly, this application also provides an electrical device, including the battery pack as described above.

[0032] This application provides a module assembly, a battery pack, and an electrical device. The module assembly includes two battery modules and a BMU assembly. The two battery modules are arranged opposite to each other along a first direction, forming an accommodating space between them. The BMU assembly is disposed within the accommodating space and connected to the two battery modules. The opposite arrangement of the two module assemblies, with the accommodating space between the modules used to house the BMU, improves the utilization rate of battery pack space resources. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of the module component provided in an embodiment of this application;

[0035] Figure 2 This is a top view of the module component provided in the embodiments of this application. Figure 1 ;

[0036] Figure 3 This is a front view of the module component provided in an embodiment of this application;

[0037] Figure 4 This is a side view of the module component provided in an embodiment of this application;

[0038] Figure 5 This is a top view of the module component provided in the embodiments of this application. Figure 2 .

[0039] Explanation of reference numerals in the attached figures:

[0040] 100. Module assembly; 1001. Accommodation space; 101. Battery module;

[0041] 10. First battery module; 11. First battery unit; 111. First sub-battery unit; 1111. First extension; 112. Second sub-battery unit;

[0042] 20. Second battery module; 21. Second battery unit; 211. Third sub-battery unit; 2111. Second extension; 212. Fourth sub-battery unit;

[0043] 30. BMU component; 31. First BMU group; 311. First BMU; 32. Second BMU group; 321. Second BMU;

[0044] 41. First connecting row; 42. Second connecting row;

[0045] 51. First span joint; 52. Second span joint;

[0046] 61. First low-voltage acquisition harness; 62. Second low-voltage acquisition harness;

[0047] 70. Connector mounting panel; 71. First high-voltage connector; 72. Second high-voltage connector; 73. Third high-voltage connector; 74. Fourth high-voltage connector.

[0048] 80. Low-voltage communication harness. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0050] Please refer to Figure 1 , Figure 2 , Figure 1 This is a schematic diagram of the structure of the module component provided in the embodiments of this application. Figure 2 This is a top view of the module component provided in the embodiments of this application. Figure 1 This application provides a module assembly 100, which includes two battery modules 101 arranged opposite to each other along a first direction, and forming an accommodating space 1001 between the two battery modules 101. The module assembly 100 also includes a BMU assembly 30, which is disposed within the accommodating space 1001 and connected to the two battery modules 101.

[0051] In related technologies, a single-row battery arrangement typically requires the use of a BMU assembly 30, which often results in low space utilization efficiency within the battery pack. In this application, however, two battery modules 101 are arranged symmetrically, and the space 1001 between the modules is specifically designed to accommodate the BMU assembly 30. By placing the BMU assembly 30 between two opposing battery modules 101, space waste caused by a single-row arrangement is effectively avoided, optimizing the overall layout and spatial arrangement of the module components. This improves the space utilization rate of the battery pack while ensuring battery performance and safety.

[0052] In some embodiments, the two battery modules include a first battery module 10 and a second battery module 20. The first battery module 10 includes a plurality of first battery units 11, and the second battery module 20 includes a plurality of second battery units 21. The plurality of first battery units 11 are arranged sequentially along a second direction, and the plurality of second battery units 21 are arranged sequentially along a second direction, which is different from the first direction.

[0053] Understandably, the first battery module 10 and the second battery module 20 are arranged along the first direction, and the multiple first battery units 11 and multiple second battery units 21 are arranged sequentially along the second direction, which can make the module structure neatly arranged and improve space utilization.

[0054] In some examples, the first battery module 10 includes six first battery units 11 arranged sequentially along a second direction, and the second battery module 20 includes six second battery units 21 arranged sequentially along a second direction. The first direction can be the length direction of the battery, and the second direction can be the width direction of the battery.

[0055] In some embodiments, the BMU component 30 includes a first BMU group 31 and a second BMU group 32, the first BMU group 31 and the second BMU group 32 are arranged along a first direction, the first BMU group 31 is connected to the first battery module 10, and the second BMU group 32 is connected to the second battery module 20.

[0056] Specifically, the BMU (Battery Management Unit) is a key component of the Battery Management System (BMS). The main function of the BMU is to monitor, manage, and protect various battery parameters to ensure safe, stable, and efficient operation of the battery during operation. It not only improves battery performance and lifespan but also prevents damage caused by improper use such as overcharging, over-discharging, and overheating, ensuring the safety of the battery system.

[0057] In some embodiments, the first BMU group 31 includes a plurality of first BMUs 311, which are arranged sequentially along a second direction, and the second BMU group 32 includes a plurality of second BMUs 321, which are arranged sequentially along a second direction.

[0058] In some examples, the first BMU group 31 includes 6 first BMUs 311, which are arranged sequentially along the second direction, and the second BMU group 32 includes 6 second BMUs 321, which are arranged sequentially along the second direction.

[0059] In some embodiments, along a first direction, a plurality of first battery cells 11 of the first battery module 10 and a plurality of second battery cells 21 of the second battery module 20 are symmetrically arranged, and a plurality of first BMUs 311 of the first BMU group 31 and a plurality of second BMUs 321 of the second BMU group 32 are symmetrically arranged.

[0060] Understandably, the first battery unit 11 and the second battery unit 21 are symmetrically arranged, the first BMU 311 and the second BMU 321 are symmetrically arranged, each first BMU 311 is connected to the first battery unit 11 near the first BMU 311, and each second BMU 321 is connected to the second battery unit 21 near the second BMU 321.

[0061] In some embodiments, the module assembly 100 further includes a first low-voltage acquisition harness 61 and a second low-voltage acquisition harness 62. One end of the first low-voltage acquisition harness 61 is connected to the first BMU group 31, and the other end of the first low-voltage acquisition harness 61 is connected to the first battery module 10. One end of the second low-voltage acquisition harness 62 is connected to the second BMU group 32, and the other end of the second low-voltage acquisition harness 62 is connected to the second battery module 20.

[0062] Specifically, the low-voltage acquisition harness is a crucial component of the battery management system (BMS), responsible for acquiring low-voltage signals from the battery pack for data transmission and monitoring. These signals typically involve parameters such as battery pack voltage, current, and temperature, providing real-time monitoring data. This information is vital for the BMS's operation, assisting it in performing tasks such as battery charge / discharge control, equalization management, and fault detection, ultimately ensuring the safe and efficient operation of the batteries.

[0063] Understandably, since the first BMU group 31 and the second BMU group 32 are located in the middle area of ​​the module assembly 100 and are symmetrically arranged, the wiring of the first low-voltage acquisition harness 61 and the second low-voltage acquisition harness 62 is relatively simple and the wiring operation is less difficult.

[0064] Please refer to Figures 3-4 , Figure 3 This is a front view of the module component provided in an embodiment of this application. Figure 4 This is a side view of a module assembly provided in an embodiment of this application. In some embodiments, each first battery unit 11 includes a stacked first sub-battery unit 111 and a second sub-battery unit 112, and the module assembly 100 further includes a first connecting bar 41 connected between the first sub-battery unit 111 and the second sub-battery unit 112. Each second battery unit 21 includes a stacked third sub-battery unit 211 and a fourth sub-battery unit 212, and the module assembly 100 further includes a second connecting bar 42 connected between the third sub-battery unit 211 and the fourth sub-battery unit 212.

[0065] Specifically, the first sub-cell unit 111 or the third sub-cell unit 211 can be a 9P17S battery unit, and the second sub-cell unit 112 or the fourth sub-cell unit 212 can be a 9P8S battery unit. A 9P17S battery module refers to a battery module composed of 9 parallel cells and 17 series cells, while a 9P8S battery module refers to a battery module composed of 9 parallel cells and 8 series cells. The 9P17S module is larger and heavier than the 9P8S module, so the 9P8S battery module is placed on the upper layer and the 9P17S battery module is placed on the lower layer to maintain the structural stability of the battery modules.

[0066] Understandably, since each first battery unit 11 includes a first sub-battery unit 111 and a second sub-battery unit 112, and each second battery unit 21 includes a third sub-battery unit 211 and a fourth sub-battery unit 212, when the first battery unit 11 and the second battery unit 21 have the same structure, the first connecting bar 41 and the second connecting bar 42 can adopt the same structure, so that the first connecting bar 41 and the second connecting bar 42 can be reused, saving the mold opening cost of the connecting bar.

[0067] In some embodiments, one end of the first low-voltage acquisition harness 61 is connected to the first BMU 311, a branch of the other end of the first low-voltage acquisition harness 61 is connected to the first sub-battery unit 111, and a branch of the other end of the first low-voltage acquisition harness 61 is connected to the second sub-battery unit 112. One end of the second low-voltage acquisition harness 62 is connected to a second BMU 321, a branch of the other end of the second low-voltage acquisition harness 62 is connected to the third sub-battery unit 211, and a branch of the other end of the second low-voltage acquisition harness 62 is connected to the fourth sub-battery unit 212.

[0068] Please refer to point 5. Figure 5 This is a top view of the module component provided in the embodiments of this application. Figure 2 In some embodiments, the first sub-battery unit 111 includes a first extension 1111 protruding beyond the second sub-battery unit 112 and close to the second battery module 20, and the third sub-battery unit 211 includes a second extension 2111 protruding beyond the fourth sub-battery unit 212 and close to the first battery module 10. A receiving space 1001 is formed between the second sub-battery unit 112, the fourth sub-battery unit 212, the first extension 1111, and the second extension 2111, and the BMU assembly 30 is mounted in the receiving space 1001.

[0069] In some embodiments, the module assembly 100 further includes a first bridge 51, which connects a first sub-battery unit 111 of one first battery cell 11 and a second sub-battery unit 112 of another first battery cell 11. The module assembly 100 further includes a second bridge 52, which connects a third sub-battery unit 211 of one second battery cell 21 and a fourth sub-battery unit 212 of another second battery cell 21.

[0070] It is understandable that each first battery unit 11 and second battery unit 21 is arranged in sequence. When the first battery unit 11 and the second battery unit 21 have the same structure, the first crossbar 51 and the second crossbar 52 can adopt the same structure, so that the first crossbar 51 and the second crossbar 52 can be reused, saving the mold opening cost of the crossbar.

[0071] In some embodiments, the module assembly 100 further includes a connector mounting panel 70, which is mounted within the accommodating space 1001 and extends from the first battery module 10 to the second battery module 20. The connector mounting panel 70 is a key component in the battery pack design used to install and secure various connectors within the battery pack, ensuring stable and safe electrical and communication connections within the battery pack, and providing necessary connection ports for critical systems such as the battery management system.

[0072] In some embodiments, the module assembly 100 further includes a first high-voltage connection bar 71 and a second high-voltage connection bar 72. One end of the first high-voltage connection bar 71 is connected to a first sub-battery unit 111 located at the beginning end, and the other end of the first high-voltage connection bar 71 is connected to a connector mounting panel 70. One end of the second high-voltage connection bar 72 is connected to a second sub-battery unit 111 located at the end end, and the other end of the second high-voltage connection bar 72 is connected to the connector mounting panel 70.

[0073] The module assembly 100 further includes a third high-voltage connection bar 73 and a fourth high-voltage connection bar 74. One end of the third high-voltage connection bar 73 is connected to the third sub-battery unit 211 located at the first end, and the other end of the third high-voltage connection bar 73 is connected to the connector mounting panel 70. One end of the fourth high-voltage connection bar 74 is connected to the fourth sub-battery unit 212 located at the end, and the other end of the fourth high-voltage connection bar is connected to the connector mounting panel 70.

[0074] In some embodiments, the module assembly 100 further includes a plurality of low-voltage communication harnesses 80 connected between the BMU assembly 30 and the connector mounting panel 70.

[0075] In some examples, each of the low-voltage communication harnesses 80 is connected between the first BMU311 and the connector mounting panel 70, and / or each of the low-voltage communication harnesses 80 is connected between the second BMU321 and the connector mounting panel 70.

[0076] For example, a low-voltage communication harness 80 is connected between the first BMU 311 and the connector mounting panel 70, and the low-voltage communication harness 80 is also connected between the second BMU 321 and the connector mounting panel 70. Alternatively, a low-voltage communication harness may be connected between the first BMU 311 and the connector mounting panel 70, while the second BMU communicates wirelessly with other electrical devices.

[0077] In some embodiments, the length D1 of the accommodating space 1001 accounts for 36%-40% of the length D2 of the module assembly 100. Specifically, the length D1 of the accommodating space 1001 may account for 36%, 36.5%, 37%, 37.5%, 38%, 38.5%, 39%, 39.5%, 40%, etc., of the length D2 of the module assembly 100, and this application does not limit it.

[0078] In some embodiments, the depth W1 of the accommodating space 1001 accounts for 9%-13% of the height W2 of the module assembly 100. Specifically, the depth W1 of the accommodating space 1001 may account for 9%, 9.5%, 10%, 11.5%, 12%, 12.5%, 13%, etc. of the height W2 of the module assembly 100, and this application does not limit it.

[0079] Understandably, the 1001 dimensional design effectively improves space utilization while ensuring overall strength and stability. At the same time, this dimensional design facilitates the assembly of other modular components, optimizes the overall layout, and improves assembly efficiency.

[0080] In some embodiments, the volume of the accommodating space 1001 accounts for 3%-5% of the volume of the module assembly 100. Specifically, the volume of the accommodating space 1001 may account for 3%, 3.3%, 3.5%, 3.7%, 3.9%, 4.1%, 4.5%, 4.7%, 5%, etc., and this application does not limit it.

[0081] The dimensional design of the accommodating space 1001 effectively improves space utilization and optimizes the design of the module component 100. This design ensures ample placement space while avoiding excessive waste of space, thereby improving energy density and overall performance.

[0082] This application also provides a battery pack, which includes the module assembly 100 as described above.

[0083] This application also provides an electrical device, which includes a battery pack as described above, used to provide electrical energy to the device. The electrical device can be an electric vehicle, power tool, electric bicycle, energy storage system, drone, mobile device, etc. By incorporating a battery, the safety of the electrical device can be ensured, and its service life can be improved.

[0084] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A module assembly (100), characterized in that, include: Two battery modules (101); The two battery modules (101) are arranged opposite to each other along a first direction, and an accommodating space (1001) is formed between the two battery modules (101); BMU component (30), which is disposed within the accommodating space (1001) and connected to the two battery modules (101).

2. The module assembly (100) according to claim 1, characterized in that, The two battery modules (101) include a first battery module (10) and a second battery module (20), wherein the first battery module (10) includes a plurality of first battery cells (11) and the second battery module (20) includes a plurality of second battery cells (21); Multiple first battery cells (11) are arranged sequentially along a second direction, and multiple second battery cells (21) are arranged sequentially along a second direction, which is different from the first direction.

3. The module assembly (100) according to claim 2, characterized in that, The BMU component (30) includes a first BMU group (31) and a second BMU group (32); The first BMU group (31) and the second BMU group (32) are arranged along the first direction. The first BMU group (31) is connected to the first battery module (10), and the second BMU group (32) is connected to the second battery module (20).

4. The module assembly (100) according to claim 3, characterized in that, The first BMU group (31) includes a plurality of first BMUs (311), and the plurality of first BMUs (311) are arranged sequentially along the second direction; The second BMU group (32) includes a plurality of second BMUs (321), which are arranged sequentially along the second direction.

5. The module assembly (100) according to claim 4, characterized in that, Along the first direction, a plurality of first battery cells (11) of the first battery module (10) and a plurality of second battery cells (21) of the second battery module (20) are symmetrically arranged, and a plurality of first BMUs (311) of the first BMU group (31) and a plurality of second BMUs (321) of the second BMU group (32) are symmetrically arranged.

6. The module assembly (100) according to claim 3, characterized in that, The module assembly (100) also includes a first low-voltage acquisition harness (61) and a second low-voltage acquisition harness (62); One end of the first low-voltage acquisition harness (61) is connected to a first BMU group (31), and the other end of the first low-voltage acquisition harness (61) is connected to the first battery module (10). One end of the second low-voltage acquisition harness (62) is connected to a second BMU group (32), and the other end of the second low-voltage acquisition harness (62) is connected to the second battery module (20).

7. The module assembly (100) according to any one of claims 2-6, characterized in that, Each of the first battery cells (11) includes a first sub-battery cell (111) and a second sub-battery cell (112) stacked together. The module assembly (100) also includes a first connecting bar (41) connected between the first sub-battery cell (111) and the second sub-battery cell (112). Each of the second battery cells (21) includes a third sub-battery cell (211) and a fourth sub-battery cell (212) stacked together. The module assembly (100) also includes a second connecting bar (42) connected between the third sub-battery cell (211) and the fourth sub-battery cell (212).

8. The module assembly (100) according to claim 7, characterized in that, The first sub-battery unit (111) includes a first extension (1111) that protrudes beyond the second sub-battery unit (112) and near the second battery module (20), and the third sub-battery unit (211) includes a second extension (2111) that protrudes beyond the fourth sub-battery unit (212) and near the first battery module (10). An accommodating space (1001) is formed between the second sub-battery unit (112), the fourth sub-battery unit (212), the first extension (1111), and the second extension (2111), and the BMU assembly (30) is installed in the accommodating space (1001).

9. The module assembly (100) according to claim 7, characterized in that, The module assembly (100) further includes a first bridge bar (51) which is connected between a first sub-battery unit (111) of one first battery unit (11) and a second sub-battery unit (112) of another first battery unit (11). The module assembly further includes a second bridge (52) that connects between the third sub-cell (211) of one second battery cell (21) and the fourth sub-cell (212) of another second battery cell (21).

10. The module assembly (100) according to claim 7, characterized in that, The module assembly (100) further includes a connector mounting panel (70) which is mounted within the accommodating space (1001) and extends from the first battery module (10) to the second battery module (20).

11. The module assembly (100) according to claim 10, characterized in that, The module assembly (100) further includes a first high-voltage connector (71) and a second high-voltage connector (72). One end of the first high-voltage connector (71) is connected to a first sub-battery unit (111) located at the first end, and the other end of the first high-voltage connector (71) is connected to a connector mounting panel (70). One end of the second high-voltage connector (72) is connected to a second sub-battery unit (112) located at the end, and the other end of the second high-voltage connector (72) is connected to the connector mounting panel (70). The module assembly (100) further includes a third high-voltage connector (73) and a fourth high-voltage connector (74). One end of the third high-voltage connector (73) is connected to the third sub-battery unit (211) located at the first end, and the other end of the fourth high-voltage connector is connected to the connector mounting panel (70). One end of the third high-voltage connector (73) is connected to the fourth sub-battery unit (212) located at the end, and the other end of the fourth high-voltage connector (74) is connected to the connector mounting panel (70).

12. The module assembly (100) according to claim 10, characterized in that, The module assembly (100) also includes a low-voltage communication harness (80) connected between the BMU assembly (30) and the connector mounting panel (70).

13. The module assembly (100) according to any one of claims 2-6, characterized in that, The length D1 of the accommodating space (1001) is between 36% and 40% of the length D2 of the module assembly (100), and / or; The depth W1 of the accommodating space (1001) is between 9% and 13% of the height W2 of the module assembly (100).

14. The module assembly (100) according to any one of claims 2-6, characterized in that, The volume of the accommodating space (1001) accounts for 3%-5% of the volume of the module component 100.

15. A battery pack, characterized in that, Includes the module component (100) as described in any one of claims 1-14.

16. An electrical appliance, characterized in that, Includes the battery pack as described in claim 15.

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