Power distribution device, battery assembly, battery pack, and electrical equipment

Abstract

The application relates to the technical field of electrical equipment, and provides a power distribution device, a battery assembly, a battery pack and a power utilization equipment. The power distribution device comprises a base, a component assembly and a circuit board. The component assembly is arranged in a cavity of the base, so that the base can protect the component assembly. Component devices in the component assembly can be electrically connected with the circuit board through connecting rows. The component devices and the connecting rows are connected in a welding mode, so that the connection between the component devices and the connecting rows is stable and reliable. When the power distribution device is in a vibrating environment, the component devices and the connecting rows can still be stably and reliably connected. The welding of the component devices and the connecting rows can also increase the contact area of the component devices and the connecting rows, so that the contact resistance of the component devices and the connecting rows is greatly reduced. When the power distribution device is powered on, the heat generation of the welding positions of the component devices and the connecting rows is greatly reduced, and the stability and reliability of the power distribution device are improved.

Description

Technical Field

[0001] This application relates to a power distribution device, battery assembly, battery pack, and electrical equipment, belonging to the field of electrical equipment technology. Background Technology

[0002] The distribution box is a key control component in the battery pack. By integrating components such as high-voltage relays and fuses, the distribution box can control the on / off state of the circuit. When overcurrent, short circuit, or leakage is detected, the fuse will cut off the circuit, and the relay will act according to the instructions of the BMS (Battery Management System) to prevent equipment damage or safety accidents.

[0003] Currently, components in distribution boxes are electrically connected by bolts. This connection method generates a lot of heat during the operation of the distribution box, leading to instability in its operation. Utility Model Content

[0004] This application provides a power distribution device, battery assembly, battery pack, and electrical equipment to solve the problem of high heat generation in the connection method of components and circuit boards in the power distribution box in the related art.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] In a first aspect, this application provides a power distribution device, comprising:

[0007] The base has a cavity;

[0008] A component assembly is disposed within the cavity. The component assembly includes a connecting bar and components. The connecting bar is welded to the components to make the connecting bar electrically connected to the components.

[0009] A circuit board is disposed in the cavity, and the circuit board is electrically connected to the component assembly.

[0010] In some embodiments, the connecting bar is an aluminum structural component.

[0011] In some embodiments, there are multiple connecting rows, and at least a portion of the multiple connecting rows are welded together.

[0012] In some embodiments, the connection bar is stacked on top of the component;

[0013] The connecting bar includes a first limiting part, and the component includes a second limiting part. The first limiting part and the second limiting part are mutually limiting in at least one direction perpendicular to the stacking direction of the connecting bar and the component.

[0014] In some embodiments, the first limiting part is an opening formed in the connecting bar, the second limiting part is an electrical connection terminal of the component, the second limiting part is inserted into the first limiting part, and the second limiting part is welded to the connecting bar.

[0015] In some embodiments, the second limiting part is an aluminum structural component.

[0016] In some embodiments, the number of the components is multiple, and the multiple components are welded to multiple connection bars.

[0017] In some embodiments, the plurality of said components include a main positive relay and a main negative relay.

[0018] In some embodiments, the component assembly further includes a fuse, one end of which is connected to one of the plurality of connection bars, and the other end of which is connected to the component.

[0019] In some embodiments, the fuse includes a connecting piece with a connecting hole, and the connecting bar includes a connecting end that passes through the connecting hole and is welded to the connecting piece.

[0020] In some embodiments, the connecting end is an aluminum structural component.

[0021] In some embodiments, the base further has an opening communicating with the cavity, the circuit board is disposed opposite to the component assembly, and the side of the circuit board facing away from the component assembly is opposite to the opening.

[0022] In some embodiments, the power distribution device further includes a connector through which the component assembly is electrically connected to the circuit board.

[0023] In some embodiments, one end of the connector is soldered to the connector bar, and the other end of the connector is inserted into the circuit board.

[0024] Secondly, based on the power distribution device described above, this application also provides a battery assembly that includes the power distribution device described above.

[0025] Thirdly, based on the power distribution device or battery assembly described above, this application also provides a battery pack, including a battery module and the power distribution device described above, wherein the battery module is electrically connected to the power distribution device, or includes the battery assembly described above.

[0026] Fourthly, based on the power distribution device, battery assembly, or battery pack described above, this application also provides an electrical device, including the power distribution device, battery assembly, or battery pack described above.

[0027] In the power distribution device provided in this application, the component assembly is housed within the cavity of the base, allowing the base to protect the component assembly. The component assembly is the main component of the power distribution device, and the components within it are electrically connected to the circuit board via connecting strips. The components are connected to the connecting strips by welding, ensuring a stable and reliable connection. This allows the components and connecting strips to remain stably and reliably connected even when the power distribution device is in a vibrating environment. Welding the components to the connecting strips also increases the contact area between the components and the connectors, significantly reducing the contact resistance. This results in a substantial reduction in heat generation at the welded joints when the power distribution device is energized, thus improving the stability and reliability of the power distribution device.

[0028] The battery assembly provided in this application includes the aforementioned power distribution device, which makes the battery pack operation safer and more stable.

[0029] The battery pack provided in this application includes the aforementioned power distribution device or battery assembly, making the battery pack operation safer and more stable.

[0030] The electrical equipment provided in this application includes the aforementioned battery packs, battery modules, or power distribution devices, making the operation of the electrical equipment safer and more stable. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of a power distribution device provided in an embodiment of this application;

[0033] Figure 2 A schematic diagram of the component assembly of the power distribution device provided in the embodiments of this application;

[0034] Figure 3 A front view schematic diagram of the gas components of the power distribution device provided in the embodiments of this application;

[0035] Figure 4 This is a schematic diagram of the components and connecting blocks of the power distribution device provided in the embodiments of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100 - Base; 110 - Cavity; 120 - Opening;

[0038] 200 - Component assembly; 210 - Connecting bar; 211 - First connecting surface; 212 - First limiting part; 213 - Connecting end; 220 - Component; 221 - Second limiting part; 230 - Fuse; 231 - Connecting piece; 232 - Connecting hole;

[0039] 300-Connector;

[0040] 400 - Circuit board. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, not all 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. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0042] The distribution box is a key control component in the battery pack. By integrating components such as high-voltage relays and fuses, the distribution box can control the on / off state of the circuit. When overcurrent, short circuit, or leakage is detected, the fuse will cut off the circuit, and the relay will act according to the instructions of the BMS (Battery Management System) to prevent equipment damage or safety accidents.

[0043] Currently, components in distribution boxes are electrically connected to current-carrying busbars via bolts. Bolts need to mate with corresponding nuts or threaded holes. However, bolted connections are limited by machining precision and tolerances, making it impossible to guarantee full contact between components and current-carrying busbars. This results in incomplete contact surfaces and resistance between the components and busbars. Such connections generate significant heat during operation, leading to instability in the distribution box. Furthermore, bolted connections are prone to loosening under vibration, further destabilizing the connection. Assembling the distribution box also requires separate bolt installation, increasing the number of components, cost, and assembly complexity. Additionally, bolted connections increase the weight of the distribution box.

[0044] In the power distribution device proposed in this application, the component assembly is housed within the cavity of the base, allowing the base to protect the component assembly. The component assembly is the main component of the power distribution device, and the components within it are electrically connected to the circuit board via connecting strips. The components are connected to the connecting strips by welding, ensuring a stable and reliable connection. This allows the components and connecting strips to remain stably and reliably connected even when the power distribution device is in a vibrating environment. Welding the components to the connecting strips also increases the contact area between the components and the connectors, significantly reducing the contact resistance. This results in a substantial reduction in heat generation at the welded joints when the power distribution device is energized, thus improving the stability and reliability of the power distribution device.

[0045] The battery pack proposed in this application includes the aforementioned power distribution device, making the battery pack operation safer and more stable.

[0046] The electrical equipment proposed in this application includes the aforementioned battery pack or power distribution device, making the operation of the electrical equipment safer and more stable.

[0047] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0048] This application discloses a power distribution device, with reference to... Figure 1 As shown, it includes a base 100, a component assembly 200, and a connector 300. This power distribution device can be used in a battery pack.

[0049] The base 100 is the basic component of the power distribution device of this application, and it can provide a mounting base for at least some other components of the power distribution device. The base 100 can be made of polymer, making it relatively lightweight and non-conductive. Alternatively, parts of the base 100 that do not contact other components can be made of metal, thus giving the base 100 better structural strength, durability, and reliability, and ensuring good insulation performance.

[0050] The base 100 has a cavity 110, which is a hollow structure within the base 100. The component assembly 200 is disposed within the cavity 110 of the base 100, allowing the base 100 to protect the component assembly 200. The component assembly 200 is a major component of the power distribution device of this application. The component assembly 200 is a conductive element and may include multiple components 220 required by the power distribution device, such as relays and fuses 230, thus making the component assembly 200 a conductive element.

[0051] refer to Figure 2 and Figure 4As shown, the connector 300 is also a conductive component. The component assembly 200 has a first connecting surface 211, and the connector 300 has a second connecting surface. The first connecting surface 211 and the second connecting surface of the connector 300 are abutted, allowing the component assembly 200 and the connector 300 to contact each other. Since both the component assembly 200 and the connector 300 are conductive components, they can be electrically connected. The connector 300 is also electrically connected to the circuit board 400, allowing the component assembly 200 to be electrically connected to the circuit board 400 via the connector 300. Specifically, a BMS, i.e., a battery management system, can be installed on the circuit board 400.

[0052] The circuit board 400 is positioned opposite the bottom wall of the cavity 110, allowing the component assembly 200 and the circuit board 400 to be installed using the depth space of the cavity 110, thus making the structure of the power distribution device of this application more compact. The first connecting surface 211 of the component assembly 200 and the second connecting surface of the connector 300 intersect the bottom wall of the cavity 110, so that the connection part of the component assembly 200 and the connector 300 intersects at the bottom wall of the cavity 110. Specifically, the connector 300 can be in the form of a thin sheet structure, with the thickness direction of the connector 300 parallel to the second connecting surface. This allows the end of the connector 300 to face the circuit board 400, making it easier to connect the circuit board 400 to the connector 300. Specifically, the connecting end of the thin sheet structure connector 300 is one end side. By making the end of the connector 300 face the circuit board 400, the end of the connector 300 can be directly inserted into the circuit board 400 to achieve electrical connection between the two.

[0053] refer to Figures 2 to 4 As shown, the component assembly 200 of this application may include a connecting strip 210 and components 220. The first connecting surface 211 of the component assembly 200 is disposed on the connecting strip 210. Correspondingly, the connector 300 contacts and is electrically connected to the connecting strip 210. The component 220 is electrically connected to the connecting strip 210, so that the component 220 can be electrically connected to the connector 300 through the connecting strip 210, and then electrically connected to the circuit board 400.

[0054] In some embodiments, the component 220 in this application can be electrically connected to the connecting bus 210 by soldering. This not only allows the component 220 to be electrically connected to the connecting bus 210, but also allows the connecting bus 210 to be fixedly connected to the component 220. Specifically, the connector 300 can be soldered to the component assembly 200 by tin soldering.

[0055] After the connecting busbar 210 and component 220 are connected by welding, the connection between component 220 and connecting busbar 210 is stable and reliable. This ensures a stable and reliable connection even when the power distribution equipment is in a vibrating environment. Increasing the electrical contact area between connecting busbar 210 and component 220 reduces the internal resistance between them. The welding method ensures a stable and reliable connection between component 220 and connecting busbar 210, maintaining a stable and reliable connection even when the power distribution equipment is in a vibrating environment. Welding component 220 to connector 210 increases the contact area between them, significantly reducing contact resistance. This results in a substantial decrease in heat generation at the welded joint when the power distribution device is energized, improving its stability and reliability. Furthermore, welding eliminates the need for bolts, reducing the overall weight of the connected device and thus lowering its overall weight.

[0056] In some embodiments, the connection bar 210 of this application is stacked on the component 220, so that the component 220 can be made into the connection bar 210 so that the component 220 is fixed to the connection bar 210.

[0057] To facilitate soldering of component 220 to connector 210, connector 210 may include a first limiting portion 212, and component 220 may include a second limiting portion 221. The first limiting portion 212 and the second limiting portion 221 engage in a limiting fit in at least one direction perpendicular to the stacking direction of connector 210 and component 220. This fixes the first limiting portion 212 and the second limiting portion 221 relative to each other in at least one direction perpendicular to the stacking direction of connector 210 and component 220. Correspondingly, component 220 and connector 210 can also be relatively fixed in at least one direction perpendicular to the stacking direction of connector 210 and component 220. This improves the stability and reliability of the electrical connection between component 220 and connector 210.

[0058] Specifically, when assembling component 220 and connecting strip 210, the first limiting part 212 and the second limiting part 221 can be installed in place first, so that component 220 and connecting strip 210 are in a limiting fit, and then the connecting strip 210 and component 220 are welded. In this way, the limiting fit of the first limiting part 212 and the second limiting part 221 can also serve to pre-fix component 220 and connecting strip 210.

[0059] In some implementations, reference Figures 2 to 4As shown, the first limiting part 212 of this application is an opening formed on the connecting block 210, and the second limiting part 221 is the electrical connection end of the component 220. The electrical connection end of the component 220 has a protruding structure. The second limiting part 221 can be embedded in the first limiting part 212, so that the inner wall of the first limiting part 212 can limit the second limiting part 221. In this way, the first limiting part 212 and the second limiting part 221 can be relatively fixed, so that the component 220 and the connecting block 210 can be relatively fixed. The second limiting part 221 is welded to the connecting block 210, thereby making the second limiting part 221 and the connecting block 210 electrically connected, and further making the component 220 and the connecting block 210 electrically connected. This also makes the welding of the component 220 and the connecting block 210 convenient.

[0060] In other embodiments, the second limiting part 221 may be an opening formed on the component 220, and the first limiting part 212 may be an electrical connection terminal on the connecting bar 210. The first limiting part 212 is embedded in the second limiting part 221, which also allows the first limiting part 212 to be matched with the second limiting part 221.

[0061] In some embodiments, both the second limiting part 221 and the connecting row 210 of this application can be made of aluminum structural components. This makes the electrical connection between the second limiting part 221 and the connecting row 210 stable and reliable, and also reduces the difficulty of the welding process between the second limiting part 221 and the connecting row 210, making the welding of the two more convenient.

[0062] In some implementations, reference Figure 2 As shown, the number of components 220 and connection bars 210 in this application can be set to multiple. Multiple components 220 can be electrically connected to multiple connection bars 210. Multiple components 220 include main positive relays and main negative relays.

[0063] In some implementations, reference Figure 2 As shown, the component assembly 200 of this application may further include a fuse 230, which is disposed on the connection bus 210, such that the fuse 230 is electrically connected to the connection bus 210. The fuse 230 is electrically connected to the main positive relay through the connection bus 210. The main positive relay, the main negative relay, and the fuse 230 can constitute the main electrical components of the power distribution device.

[0064] In some implementations, reference Figure 3As shown, the fuse 230 includes a connecting piece 231, which may have a connecting hole 232. A connecting end 213 may be provided on the connecting strip 210. The connecting end 213 passes through the connecting hole 232 and is welded to the connecting piece 231 of the fuse 230. The connecting piece 231 is also an aluminum structural component, so the material of the connecting piece 231 is the same as that of the connecting strip 210, and the electrical connection between the connecting piece 231 and the connecting strip 210 is stable and reliable.

[0065] In some implementations, reference Figure 4 As shown, among the multiple connecting bars 210 of this application, at least two connecting bars 210 can be connected, and the two connecting bars 210 are welded together, which makes the connection between the two connecting bars 210 stable and reliable.

[0066] Specifically, among the multiple connecting bars 210, some connecting bars 210 are connected to components 220; these are called the first connecting bars, and some connecting bars 210 are called the second connecting bars, which are connected to the first connecting bars. By soldering the first connecting bars to the second connecting bars, components 220 can be more easily electrically connected to other components via the connecting bars 210. Furthermore, the length of a single connecting bar 210 can be reduced, lowering the manufacturing complexity of the connecting bars 210.

[0067] In some implementations, reference Figures 1 to 2 As shown, the first connecting surface 211 and the second connecting surface in this application can be perpendicular to the bottom wall of the cavity 110, that is, the first connecting surface 211 and the second connecting surface are perpendicular to the depth direction of the cavity 110. Correspondingly, the connector 300 can be vertically arranged in the cavity 110 of the base 100. Since the connector 300 is a thin sheet structure, it occupies less space in the length and width directions of the cavity 110, allowing for more space in the cavity 110 to install other components of the power distribution device, such as the component assembly 200.

[0068] In some implementations, reference Figures 1 to 2As shown, the base 100 in this application may also have an opening 120, which communicates with the cavity 110 and is opposite to the bottom wall of the cavity 110. When assembling the power distribution device of this application, the component assembly 200 and the connector 300 can be installed in the cavity 110 through the opening 120. The side of the circuit board 400 facing away from the component assembly 200 is opposite to the opening 120, allowing the component assembly 200 and the circuit board 400 to be stacked along the depth direction of the cavity 110. This allows the component assembly 200 and the circuit board 400 to fully utilize the depth space of the cavity 110, resulting in a smaller overall structure that occupies less space in the length and width directions of the cavity 110. This makes the structure of the base 100 more compact, and ultimately makes the structure of the power distribution device of this application more compact.

[0069] In some implementations, reference Figure 1 As shown, the circuit board 400 of this application can cover the component assembly 200, thus shielding the component assembly 200 within the cavity 110 of the base 100. Accordingly, the circuit board 400 can protect the component assembly 200, making its installation and operation more reliable.

[0070] In some implementations, reference Figures 1 to 2 As shown, the connector 300 of this application can be plugged into the circuit board 400, so that the connector 300 and the circuit board 400 are electrically connected. Specifically, the circuit board 400 can have a plug interface corresponding to the connector 300, and the end of the connector 300 facing the circuit board 400 can be plugged into the plug interface of the circuit board 400. This makes the electrical connection structure between the connector 300 and the circuit board 400 easy to assemble, and the electrical connection effect is stable and reliable.

[0071] In addition, in other embodiments, the end of the connector 300 can be bent so that the end of the connector 300 can be inserted into the interface of the circuit board 400 after bending, so as to improve the stability and reliability of the electrical connection between the connector 300 and the circuit board 400.

[0072] In some embodiments, to further enhance the stability and reliability of the electrical connection between the connector 300 and the component assembly 200, the connector 300 can be welded to the component assembly 200. Specifically, laser welding can be used to penetrate the connector 300 and the component assembly 200, thereby welding the connector 300 to the component assembly 200.

[0073] After the connector 300 is connected to the component assembly 200 by welding, the electrical connection contact area between the connector 300 and the component assembly 200 can be increased, thereby reducing the internal resistance between the connector 300 and the component assembly 200.

[0074] In some implementations, reference Figure 2 As shown, the number of connectors 300 in this application can also be set to multiple, and all multiple connectors 300 are electrically connected to the connecting bar 210. Correspondingly, the connecting bar 210 has multiple first connecting surfaces 211. The multiple connectors 300 can be electrically connected to the main positive relay, the main negative relay, and the fuse 230 respectively through the connecting bar 210, so that the main positive relay, the main negative relay, and the fuse 230 can all be electrically connected to the circuit board 400.

[0075] Based on the power distribution device described above, this application also proposes a battery assembly including the power distribution device described above.

[0076] Based on the power distribution device or battery assembly described above, this application also proposes a battery pack, including a battery module and the power distribution device described above, wherein the battery module is electrically connected to the power distribution device, or includes a battery assembly.

[0077] Based on the power distribution device, battery assembly, or battery pack described above, this application also proposes an electrical device that includes the power distribution device, battery assembly, or battery pack described above.

[0078] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0079] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0080] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0081] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A power distribution device, characterized in that, include: The base (100) has a cavity (110); A component assembly (200) is disposed within the cavity (110). The component assembly (200) includes a connecting bar (210) and a component (220). The connecting bar (210) is welded to the component (220) so that the connecting bar (210) and the component (220) are electrically connected. A circuit board (400) is disposed in the cavity (110), and the circuit board (400) is electrically connected to the component assembly (200).

2. The power distribution device according to claim 1, characterized in that, The connecting bar (210) is an aluminum structural component.

3. The power distribution device according to claim 1, characterized in that, The number of connecting rows (210) is multiple, and at least a portion of the multiple connecting rows (210) are welded together.

4. The power distribution device according to claim 2, characterized in that, The connecting bar (210) is stacked on the component (220). The connecting bar (210) includes a first limiting part (212), and the component (220) includes a second limiting part (221). The first limiting part (212) and the second limiting part (221) are engaged in a limiting cooperation in at least one direction perpendicular to the stacking direction of the connecting bar (210) and the component (220).

5. The power distribution device according to claim 4, characterized in that, The first limiting part (212) is an opening in the connecting bar (210), the second limiting part (221) is an electrical connection terminal of the component (220), the second limiting part (221) is inserted into the first limiting part (212), and the second limiting part (221) is welded to the connecting bar (210).

6. The power distribution device according to claim 4, characterized in that, The second limiting part (221) is an aluminum structural component.

7. The power distribution device according to claim 3, characterized in that, The number of the components (220) is multiple, and the multiple components (220) are welded to the multiple connecting bars (210).

8. The power distribution device according to claim 7, characterized in that, The plurality of said components (220) include a main positive relay and a main negative relay.

9. The power distribution device according to claim 3, characterized in that, The component assembly (200) also includes a fuse (230), one end of which is connected to one of the plurality of connection bars (210), and the other end of which is connected to the component (220).

10. The power distribution device according to claim 9, characterized in that, The fuse (230) includes a connecting piece (231) with a connecting hole (232). The connecting bar (210) includes a connecting end (213) which passes through the connecting hole (232) and is welded to the connecting piece (231).

11. The power distribution device according to claim 10, characterized in that, The connecting end (213) is an aluminum structural component.

12. The power distribution device according to any one of claims 1-11, characterized in that, The base (100) also has an opening (120) communicating with the cavity (110), the circuit board (400) is disposed opposite to the component assembly (200), and the side of the circuit board (400) facing away from the component assembly (200) is opposite to the opening (120).

13. The power distribution device according to any one of claims 1-11, characterized in that, The power distribution device also includes a connector (300), through which the component assembly (200) is electrically connected to the circuit board (400).

14. The power distribution device according to claim 13, characterized in that, One end of the connector (300) is welded to the connecting bar (210), and the other end of the connector (300) is inserted into the circuit board (400).

15. A battery assembly, characterized in that, Includes the power distribution equipment as described in any one of claims 1-14.

16. A battery pack, characterized in that, It includes a battery module and a power distribution device as described in any one of claims 1-14, wherein the battery module is electrically connected to the power distribution device, or includes a battery assembly as described in claim 15.

17. An electrical appliance, characterized in that, It includes the power distribution device as described in any one of claims 1-14, or the battery assembly as described in claim 15, or the battery pack as described in claim 16.

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