Battery pack and powered device

Abstract

The application provides a battery pack and an electric device. Second battery units are stacked on a side of first units away from a second battery module, fourth battery units are stacked on a side of third battery units away from a first battery module, and the first battery units, the second battery units, the third battery units and the fourth battery units form an avoiding groove. The avoiding groove is used for avoiding a beam structure or other components of a vehicle, so as to maximize the use of a special-shaped space in the vehicle, thereby placing more battery units and increasing the total energy of the battery pack, and meeting the demand of long endurance of the vehicle.

Description

Technical Field

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

[0002] In related technologies, vehicles typically use multiple small-capacity standard battery packs connected in series and parallel, mounted on the sides of the vehicle frame. This design results in irregular shapes in the vehicle's undercarriage space, making it difficult to design and manufacture standard battery packs that can only be placed in specific areas. This leads to low overall volumetric utilization and insufficient battery capacity to meet the vehicle's long-range requirements. Utility Model Content

[0003] The embodiments of this application provide a battery pack and an electrical device that can improve the technical problem of poor battery life in irregularly shaped spaces.

[0004] In a first aspect, embodiments of this application provide a battery module, the battery module comprising:

[0005] First battery module;

[0006] The second battery module is disposed opposite to the first battery module;

[0007] The first battery module includes a first battery unit and a second battery unit, wherein the second battery unit is stacked on the side of the first battery unit away from the second battery module;

[0008] The second battery module includes a third battery unit and a fourth battery unit, wherein the fourth battery unit is stacked on the side of the third battery unit away from the first battery module;

[0009] The first battery unit, the second battery unit, the third battery unit, and the fourth battery unit form a clearance groove.

[0010] In some embodiments, the first battery module and the second battery module are disposed opposite to each other along a first direction, the first battery unit and the second battery unit are stacked along a second direction, and the third battery unit and the fourth battery unit are stacked along a second direction;

[0011] The first direction is the length or width direction of the battery pack, and the second direction is the height direction of the battery pack.

[0012] In some embodiments, the first battery module includes a plurality of first battery cells, which are stacked in the first battery unit and the second battery unit along a second direction, and each first battery cell is disposed along a third direction.

[0013] The second battery module includes multiple second battery cells, which are stacked in the third and fourth battery units along a second direction, and each first battery cell is disposed along a third direction.

[0014] The third direction is different from the first direction and the second direction.

[0015] In some embodiments, the first battery module includes a first connection bar, and a plurality of stacked first battery cells are connected through the first connection bar;

[0016] The second battery module includes a second connecting bar, through which multiple stacked second battery cells are connected.

[0017] In some embodiments, the first battery module includes a first liquid cooling pipe disposed between a plurality of stacked first battery cells;

[0018] The second battery module includes a second liquid cooling pipe disposed between multiple stacked second battery cells.

[0019] In some embodiments, the first battery module includes a first FPC and a second FPC, a plurality of first battery cells located in the first battery unit are connected to the first FPC, and a plurality of first battery cells located in the second battery unit are connected to the second FPC.

[0020] The second battery module includes a third FPC and a fourth FPC. A plurality of second battery cells located in the third battery unit are connected to the third FPC, and a plurality of second battery cells located in the fourth battery unit are connected to the fourth FPC.

[0021] In some embodiments, the battery pack includes a plurality of first battery modules, which are arranged sequentially along a third direction to form a first battery assembly;

[0022] The battery pack includes multiple second battery modules, which are arranged sequentially along a third direction to form a second battery assembly. The first battery assembly and the second battery assembly are arranged opposite each other along a first direction.

[0023] In some embodiments, the battery pack includes a first series connector and a second series connector;

[0024] Two adjacent first battery modules are connected by a first serial connector;

[0025] Two adjacent second battery modules are connected by a second serial connector.

[0026] In some embodiments, the battery pack includes a housing, a plurality of first battery components and a plurality of second battery components are disposed in the housing, the battery pack includes a heat insulation portion, and the heat insulation portion is provided between any one of the first battery components and the housing.

[0027] In some embodiments, the battery pack includes a base plate for supporting the first battery assembly and the second battery assembly. The base plate has a pressure relief channel and a pressure relief hole. The pressure relief channel communicates with the pressure relief hole, and the first battery assembly and the second battery assembly can release pressure through the pressure relief hole.

[0028] Secondly, this application provides an electrical device including the battery pack as described above.

[0029] In some embodiments, the battery pack further includes an electrical component and a cover, the electrical component being disposed in the clearance groove, the cover covering the electrical component, the first battery module, and the second battery module, and the electrical device further includes a mounting beam mounted on the cover.

[0030] In some embodiments, an installation space is formed between the electrical component and the second battery unit and the fourth battery unit, and the mounting beam includes two mounting rods, with each installation space having one of the mounting rods.

[0031] In some embodiments, the electrical equipment further includes two mounting brackets, which are respectively mounted on the first battery module and the second battery module, and each of the mounting rods is fixed to one of the mounting brackets.

[0032] In some embodiments, the shortest distance between the mounting beam and the clearance groove is greater than or equal to 10 mm.

[0033] The beneficial effects of the embodiments of this application are as follows:

[0034] In the embodiments of this application, the second battery unit is stacked on the side of the first unit away from the second battery module, and the fourth battery unit is stacked on the side of the third battery unit away from the first battery module. The first, second, third, and fourth battery units surround and form a clearance groove. The clearance groove is used to avoid the vehicle's beam structure or other components, so as to maximize the use of irregularly shaped spaces in the vehicle, thereby placing more battery units, increasing the total energy of the battery pack, and meeting the vehicle's long range requirements. Attached Figure Description

[0035] 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.

[0036] Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of this application;

[0037] Figure 2 yes Figure 1 An exploded view of the battery pack shown.

[0038] Figure 3 yes Figure 1 The front view of the battery pack shown;

[0039] Figure 4 yes Figure 1 A cross-sectional view of the battery pack shown;

[0040] Figure 5 yes Figure 4 The cross-sectional view of the first battery module shown;

[0041] Figure 6 This is a partial structural diagram of the electrical equipment provided in this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100. Battery pack; 1001. Clearance groove; 1002. Housing; 1003. Base plate

[0044] 10. First battery module; 101. First battery cell; 11. First battery unit; 12. Second battery unit; 13. First battery assembly;

[0045] 20. Second battery module; 201. Second battery cell; 21. Third battery unit; 22. Fourth battery unit; 23. Second battery assembly;

[0046] 30. Electrical components;

[0047] 40. Cover;

[0048] 200, Mounting beam; 2001, Installation space; 202, Mounting rod. 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] In related technologies, vehicles typically use multiple small-capacity standard battery packs connected in series and parallel, primarily mounted on the sides of the vehicle frame. This design results in irregularly shaped spaces under the vehicle, making it difficult to design and manufacture a standard 100mAh battery pack that can only be placed in specific areas. This leads to low overall volumetric efficiency and insufficient battery capacity to meet the demands of long-range driving.

[0051] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of this application. Figure 2 yes Figure 1 An exploded view of the battery pack 100 is shown. This application provides a battery pack 100, which includes a first battery module 10 and a second battery module 20, the second battery module 20 being disposed opposite to the first battery module 10. The first battery module 10 includes a first battery unit 11 and a second battery unit 12, the second battery unit 12 being stacked on the side of the first battery unit 11 away from the second battery module 20. The second battery module 20 includes a third battery unit 21 and a fourth battery unit 22, the fourth battery unit 22 being stacked on the side of the third battery unit 21 away from the first battery module 10.

[0052] The first battery unit 11, the second battery unit 12, the third battery unit 21 and the fourth battery unit 22 form a clearance groove 1001.

[0053] Understandably, by using the first battery unit 11, the second battery unit 12, the third battery unit 21, and the fourth battery unit 22 to form a clearance slot 1001, the clearance slot 1001 can avoid the vehicle's beam structure or other components without altering the original vehicle structure, maximizing the use of irregularly shaped space inside the vehicle. This design allows for the placement of more battery units within a limited space, thereby significantly increasing the total energy storage of the battery pack 100. Increasing the total energy of the battery pack 100 improves the vehicle's range and meets the needs of long-distance travel.

[0054] In some embodiments, the clearance groove 1001 has a length of 1127 mm, a width of 915 mm, and a height of 235 mm. The clearance groove 1001 is used to reserve the installation distance for beam structures or other components. This size design ensures that the clearance groove 1001 can reasonably avoid vehicle structures and improve space utilization.

[0055] In some embodiments, the first battery module 10 and the second battery module 20 are disposed opposite to each other along a first direction, the first battery unit 11 and the second battery unit 12 are stacked along a second direction, and the third battery unit 21 and the fourth battery unit 22 are stacked along the second direction. The first direction is the length or width direction of the battery pack 100, and the second direction is the height direction of the battery pack 100.

[0056] In some embodiments, the first battery module 10 includes a plurality of first battery cells 101, which are stacked in the first battery unit 11 and the second battery unit 12 along a second direction, and each first battery cell 101 is disposed along a third direction. The second battery module 20 includes a plurality of second battery cells 201, which are stacked in the third battery unit 21 and the fourth battery unit 22 along a second direction, and each first battery cell 101 is disposed along a third direction, which is different from the first direction and the second direction.

[0057] The third direction can be the length or width direction of the battery pack. For example, the first direction is the width direction of the battery pack 100, and the third direction is the length direction of the battery pack. Multiple first battery cells 101 and multiple second battery cells 201 are stacked, so that the first battery module 10 and the second battery module 20 have more space to accommodate the battery cells that are laid down, thereby increasing the space utilization rate.

[0058] The first battery cell 101 or the second battery cell 201 may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., which are not limited herein.

[0059] Please refer to Figures 3-5 , Figure 3 yes Figure 1 The front view of the battery pack 100 shown is shown. Figure 4 yes Figure 1 The cross-sectional view of the battery pack 100 shown is shown. Figure 5 yes Figure 4 The diagram shows a cross-sectional view of the first battery module 10. In some embodiments, the first battery module 10 includes a first connecting bar, through which the stacked first battery cells 101 are connected. The second battery module 20 includes a second connecting bar, through which the stacked second battery cells 201 are connected.

[0060] A connector is a system used to ensure electrical connections and thermal management between battery cells, which is crucial for the performance and safety of the battery pack. The first and second connectors can have irregular shapes. The first connector connects the first battery cell 101 in series or in parallel, and the second connector connects the second battery cell 201 in series or in parallel, ensuring a stable and safe electrical connection between the battery cells.

[0061] In some embodiments, the first battery module 10 includes a first liquid cooling pipe disposed between a plurality of stacked first battery cells 101. The second battery module 20 includes a second liquid cooling pipe disposed between a plurality of stacked second battery cells 201.

[0062] Understandably, the battery pack 100 generates heat during operation, especially during charging and discharging. To prevent battery damage or safety issues due to overheating, the coolant (such as water or a coolant) flowing within the liquid cooling pipes absorbs the heat generated by the battery pack 100, helping to lower the battery temperature and maintain it within its optimal operating temperature range. Furthermore, the liquid cooling pipe design allows the coolant to cover all areas inside the first battery module 10 and the second battery module 20, achieving uniform temperature control and preventing localized overheating. Improving battery performance and lifespan, the serpentine cooling pipes, through effective heat dissipation, prevent performance degradation or shortened lifespan due to overheating, ensuring the battery operates in a highly efficient and safe state.

[0063] In some embodiments, the first battery module 10 includes a first FPC and a second FPC, with a plurality of first battery cells 101 located in the first battery unit 11 connected to the first FPC, and a plurality of first battery cells 101 located in the second battery unit 12 connected to the second FPC. The second battery module 20 includes a third FPC and a fourth FPC, with a plurality of second battery cells 201 located in the third battery unit 31 connected to the third FPC, and a plurality of second battery cells 201 located in the fourth battery unit 22 connected to the fourth FPC.

[0064] Flexible printed circuits (FPCs) are a common connection method, especially in the design of battery pack 100, used to achieve efficient electrical connections. FPCs are lightweight and flexible, with good adaptability and durability, and are widely used for connections between battery pack 100 and the battery management system. In this application, the upper and lower battery cells of the first battery module 10 and the second battery module 20 are acquired through two FPCs, and two acquisition interfaces are output, enabling data acquisition and processing of the upper and lower parts of the battery modules separately.

[0065] In some embodiments, the battery 100 includes a plurality of first battery modules 10, which are sequentially arranged along a third direction to form a first battery assembly 13. The battery pack 100 includes a plurality of second battery modules 20, which are sequentially arranged along a third direction to form a second battery assembly 23, and the first battery assembly 13 and the second battery assembly 23 are arranged opposite to each other along a first direction.

[0066] Understandably, the first battery module 10 and the second battery module 20 are arranged along a third direction, and the first battery assembly 13 and the second battery assembly 23 are arranged opposite each other along a first direction, which can make the module structure neatly arranged and improve space utilization.

[0067] In some embodiments, the battery pack 100 includes a first series connector and a second series connector, with two adjacent first battery modules 10 connected through the first series connector and two adjacent second battery modules 20 connected through the second series connector.

[0068] In some cases, the first and second series connectors can be stacked structures. Stacked connections minimize contact resistance at connection points, thus avoiding current loss and overheating due to poor contact, and increasing current conduction efficiency between battery modules. Series connectors allow multiple battery modules to be interconnected to form battery packs, meeting the high-voltage requirements of high-power devices.

[0069] In some embodiments, the battery pack 100 includes a housing 1002, the first battery assembly 13 and the second battery assembly 23 are disposed within the housing 1002, the battery pack 100 includes a heat insulation portion, and the heat insulation portion is provided between either the first battery assembly 13 or the second battery assembly 23 and the housing 1002.

[0070] It is understandable that batteries may generate a large amount of heat during charging and discharging. Improper management could lead to overheating, or even fire or thermal runaway. Therefore, installing a heat insulation layer on the outside of the battery module is crucial for ensuring the safety of the battery pack 100. This enhances the safety of the battery system, effectively prevents the risks of overheating, fire, or heat spread, and strengthens the thermal management and insulation protection of the battery pack 100. The heat insulation layer can be heat-insulating foam, heat-insulating coating, heat-insulating film, etc., and this application does not limit its application to these materials.

[0071] In some embodiments, foam or potting compound is used to fill the spaces between two adjacent first battery modules 10 and two adjacent second battery modules 20. The main functions of the foam or potting compound are to provide structural support, insulation, heat dissipation, shock absorption, and waterproofing. It is typically used to fill gaps between battery modules to ensure the safety, reliability, and performance of the battery pack 100. For example, it helps prevent battery modules from moving due to vibration or impact during use, thereby reducing the risk of damage and enhancing the stability of the battery pack 100. Furthermore, batteries generate heat during charging and discharging; the foam and potting compound materials typically have a certain thermal conductivity, which helps to evenly distribute and dissipate heat, preventing localized overheating of the battery.

[0072] In some embodiments, the battery pack 100 includes a base plate 1003 for supporting the first battery assembly 13 and the second battery assembly 23. The base plate has a pressure relief channel and a pressure relief hole. The pressure relief channel communicates with the pressure relief hole, and the first battery assembly 13 and the second battery assembly 23 can release pressure through the pressure relief hole.

[0073] Setting up a pressure relief channel within the base plate 1003 further increases the space for gas containment, providing the pressure relief system with greater capacity to alleviate gas pressure. This improves the overall safety and pressure relief effect of the battery pack 100, thereby reducing the risk of thermal runaway propagation.

[0074] Please refer to Figure 6 , Figure 6This is a partial structural schematic diagram of the electrical device provided in this application. This application also provides an electrical device including a battery as described above, which provides 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's use can be ensured, and its service life can be improved.

[0075] In some embodiments, the battery pack 100 further includes an electrical component 30 disposed in the clearance slot 1001. The electrical component 30 is spaced apart from the second battery unit 12 and the fourth battery unit 22, and each forms an installation space 2001. The electrical device further includes a mounting beam 200, which includes two mounting rods 202. Each installation space 2001 is provided with one mounting rod 202.

[0076] Specifically, electrical component 30 can be a BMU component. The BMU (Battery Management Unit) is a key component of the battery management system. The main function of the BMU is to monitor, manage, and protect various parameters of the battery to ensure its safe, stable, and efficient operation 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.

[0077] In some embodiments, when the electrical equipment is a vehicle, the mounting beam 200 is disposed at the bottom of the vehicle. The electrical equipment also includes a mounting bracket installed outside the housing 1002, to which the mounting beam 200 is fixed. The clearance slot 1001 can accommodate the electrical assembly 30, and an installation space 2001 is formed between the electrical assembly 30 and the second battery unit 12 and the fourth battery unit 22 on both sides. The installation space 2001 can accommodate the mounting rod 202, realizing the connection of the battery pack 100 and ensuring the maximum utilization of irregular space.

[0078] In some embodiments, the battery pack 100 further includes a cover 40 covering the electrical component 30, the first battery module 10, and the second battery module 20, wherein the shape of the cover 40 is adapted to the electrical component 30, the first battery module 10, and the second battery module 20.

[0079] Understandably, the cover 40, which covers the electrical component 30, the first battery module 10, and the second battery module 20, enhances the overall structural stability of the enclosure and prevents the electrical component 30, the first battery module 10, and the second battery module 20 from being impacted by external forces. The battery pack 100 also has pre-reserved mounting positions around its perimeter, allowing for a secure locking and fixation between the battery pack 100 and the electrical equipment. This not only ensures a more stable connection between the enclosure and the electrical equipment but also improves the enclosure's durability, shock resistance, and safety during use.

[0080] In some embodiments, the battery pack 100 includes a low-voltage acquisition harness connected to the electrical component 30 and the first battery assembly 13 and the second battery assembly 23. The low-voltage acquisition harness is an important part of the battery management system, responsible for acquiring low-voltage signals from the battery pack 100 for data transmission and monitoring. These signals typically relate to parameters such as battery voltage, current, and temperature, providing real-time monitoring data.

[0081] In some embodiments, the battery pack 100 further includes a connector mounting panel, which is mounted within the clearance groove 1001 and located on one side of the electrical component 30. The connector mounting panel is a key component in the design of the battery pack 100 for installing and securing various connectors within the battery pack 100, ensuring stable and safe electrical and communication connections within the battery pack 100, and providing necessary connection ports for critical systems such as the battery management system.

[0082] In some embodiments, the battery pack 100 includes two mounting brackets, which are respectively mounted on the first battery module 10 and the second battery module 20, and each mounting rod 202 is fixed to one of the mounting brackets. Specifically, each mounting bracket has an installation space, and the mounting bracket covers the first battery module 10 and the second battery module 20, respectively. The mounting rod 202 is disposed between the two mounting brackets, and each mounting rod is fixed to one mounting bracket. This design enhances the robustness and safety of the battery pack, reducing the risk of the battery pack loosening or falling off due to equipment vibration or movement. In addition, this connection method ensures the stable performance of the battery pack in various environments, helping to improve the overall reliability and efficiency of the electrical equipment.

[0083] In some embodiments, the shortest distance between the mounting beam 200 and the clearance groove 1001 is greater than or equal to 10 mm. Specifically, the shortest distance is the straight-line distance between any point on the clearance groove 1001 and any point on the mounting beam 200, and this straight line is perpendicular to two parallel straight lines passing through the two points. Since the clearance groove 1001 is formed by two battery modules, if the shortest distance between a point on the mounting beam 200 and a point on the first battery module 10 is A, then the length of A is greater than or equal to 10 mm. The shortest distance between the mounting beam 200 and the clearance groove 1001 can be 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, etc. It is understood that reserving a margin of greater than or equal to 10 mm is to ensure sufficient clearance during assembly to avoid mutual interference between the mounting beam 200 and the battery pack 100, thereby improving the stability and reliability of the overall structure.

[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 battery pack (100), characterized in that, The battery pack (100) includes: First battery module (10); The second battery module (20) is disposed opposite to the first battery module (10); The first battery module (10) includes a first battery unit (11) and a second battery unit (12), wherein the second battery unit (12) is stacked on the side of the first battery unit (11) away from the second battery module (20); The second battery module (20) includes a third battery unit (21) and a fourth battery unit (22), wherein the fourth battery unit (22) is stacked on the side of the third battery unit (21) away from the first battery module (10); The first battery unit (11), the second battery unit (12), the third battery unit (21), and the fourth battery unit (22) form a clearance groove (1001).

2. The battery pack (100) according to claim 1, characterized in that, The first battery module (10) and the second battery module (20) are arranged opposite to each other along a first direction, the first battery unit (11) and the second battery unit (12) are stacked along a second direction, and the third battery unit (21) and the fourth battery unit (22) are stacked along a second direction; The first direction is the length or width direction of the battery pack (100), and the second direction is the height direction of the battery pack (100).

3. The battery pack (100) according to claim 2, characterized in that, The first battery module (10) includes a plurality of first battery cells (101), which are stacked in the first battery unit (11) and the second battery unit (12) along a second direction, and each first battery cell (101) is disposed along a third direction. The second battery module (20) includes a plurality of second battery cells (201), which are stacked in the third battery unit (21) and the fourth battery unit (22) along a second direction, and each first battery cell (101) is disposed along a third direction; The third direction is different from the first direction and the second direction.

4. The battery pack (100) according to claim 3, characterized in that, The first battery module (10) includes a first connecting bar, and multiple stacked first battery cells (101) are connected through the first connecting bar; The second battery module (20) includes a second connecting bar, and multiple stacked second battery cells (201) are connected through the second connecting bar.

5. The battery pack (100) according to claim 3, characterized in that, The first battery module (10) includes a first liquid cooling pipe, which is disposed between a plurality of stacked first battery cells (101); The second battery module (20) includes a second liquid cooling pipe disposed between a plurality of stacked second battery cells (201).

6. The battery pack (100) according to claim 3, characterized in that, The first battery module (10) includes a first FPC and a second FPC. A plurality of first battery cells (101) located in the first battery unit (11) are connected to the first FPC, and a plurality of first battery cells (101) located in the second battery unit (12) are connected to the second FPC. The second battery module (20) includes a third FPC and a fourth FPC. A plurality of second battery cells (201) located in the third battery unit (21) are connected to the third FPC, and a plurality of second battery cells (201) located in the fourth battery unit (22) are connected to the fourth FPC.

7. The battery pack (100) according to any one of claims 3-6, characterized in that, The battery pack (100) includes a plurality of first battery modules (10), which are arranged sequentially along a third direction to form a first battery assembly (13); The battery pack (100) includes a plurality of second battery modules (20), which are arranged sequentially along a third direction to form a second battery assembly (23), and the first battery assembly (13) and the second battery assembly (23) are arranged opposite to each other along a first direction.

8. The battery pack (100) according to claim 7, characterized in that, The battery pack (100) includes a first series connector and a second series connector; Two adjacent first battery modules (10) are connected by a first serial connector; Two adjacent second battery modules (20) are connected by a second serial connector.

9. The battery pack (100) according to claim 7, characterized in that, The battery pack (100) includes a housing (1002), the first battery assembly (13) and the second battery assembly (23) are disposed inside the housing (1002), the battery pack (100) includes a heat insulation part, and the heat insulation part is provided between either the first battery assembly (13) or the second battery assembly (23) and the housing (1002).

10. The battery pack (100) according to claim 7, characterized in that, The battery pack (100) includes a base plate (1003) for supporting the first battery assembly (13) and the second battery assembly (23). The base plate (1003) has a pressure relief channel and a pressure relief hole. The pressure relief channel communicates with the pressure relief hole, and the first battery assembly (13) and the second battery assembly (23) can release pressure through the pressure relief hole.

11. An electrical appliance, characterized in that, Includes the battery pack (100) as described in any one of claims 1-10.

12. The electrical equipment according to claim 11, characterized in that, The battery pack (100) also includes an electrical component (30), which is disposed in the clearance slot (1001). The electrical component (30) is spaced apart from the second battery unit (12) and the fourth battery unit (22), and each forms an installation space (2001). The electrical equipment also includes a mounting beam (200), which includes two mounting rods (202). Each installation space (2001) is provided with one mounting rod (202).

13. The electrical equipment according to claim 12, characterized in that, The electrical equipment also includes two mounting brackets, which are respectively mounted on the first battery module (10) and the second battery module (20), and each of the mounting rods (202) is fixed to one of the mounting brackets.

14. The electrical equipment according to claim 12, characterized in that, The shortest distance between the mounting beam (200) and the clearance groove (1001) is greater than or equal to 10 mm.

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