Electrical connection assembly for power distribution unit, power distribution unit and vehicle

Abstract

The utility model relates to an electric connection assembly for a power distribution unit, the power distribution unit and a vehicle. The power distribution unit comprises a shell, a first bus bar is arranged in the shell, and the electric connection assembly comprises a support which is detachably fixed on the shell; the first wiring end is provided with a first end part and a second end part, and the first end part of the first wiring end is fixed at the bracket; the first stud is provided with a threaded hole and is fixed above the first end part of the first terminal, and the first bus bar is fixed on the first stud through a first bolt; a first conductive post fixed above the first end portion of the first terminal and electrically connected with the first bus bar; and the first insulation heat dissipation piece is located below the first end portion of the first wiring end, the first insulation heat dissipation piece is provided with a first side and a second side, the first side of the first insulation heat dissipation piece is in direct contact with the first end portion of the first wiring end, and the second side of the first insulation heat dissipation piece is in direct contact with the shell.

Description

Technical Field

[0001] The present application relates to the field of electrical connection technology, and in particular, to an electrical connection assembly for a power distribution unit, a power distribution unit provided with the electrical connection assembly, and a vehicle equipped with the power distribution unit. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present disclosure. To the extent described in this section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present disclosure.

[0003] With the continuous development of new energy technologies, hydrogen fuel cells are gradually entering the transportation sector due to their green and energy-saving characteristics. In new energy vehicles, the power distribution unit is used to distribute the electrical power of the power battery (such as the battery stack) and / or external power supply to multiple components of the vehicle, such as the motor, onboard transformer unit, heating device, air conditioning compressor, etc. Utility Model Content

[0004] According to the present application, an electrical connection assembly for a power distribution unit is provided. The power distribution unit includes a housing, a first bus bar is disposed in the housing, and the electrical connection assembly includes:

[0005] a bracket, which is detachably fixed to the housing;

[0006] a first terminal having a first end and a second end, wherein the first end of the first terminal is fixed to the bracket;

[0007] a first stud having a threaded hole and fixed above the first end of the first terminal, wherein the first bus bar is fixed to the first stud by a first bolt;

[0008] a first conductive post fixed above the first end of the first terminal and electrically connected to the first bus bar; and

[0009] a first insulating heat sink located below the first end portion of the first terminal and configured to isolate the first end portion of the first terminal from the housing; and wherein the first insulating heat sink has a first side and a second side; the first side of the first insulating heat sink is in direct contact with the first end portion of the first terminal, and the second side of the first insulating heat sink is in direct contact with the housing.

[0010] Optionally, in the aforementioned electrical connection assembly, a second bus bar is provided in the housing, wherein the electrical connection assembly further comprises:

[0011] a second terminal having a first end and a second end, wherein the first end of the second terminal is fixed to the bracket;

[0012] a second stud having a threaded hole and fixed above the first end of the second terminal, wherein the second bus bar is fixed to the second stud by a second bolt;

[0013] a second conductive post fixed above the first end of the second terminal and electrically connected to the second bus bar; and

[0014] A second insulating heat sink is located below the first end portion of the second terminal and is used to isolate the first end portion of the second terminal from the shell, and the second insulating heat sink has a first side and a second side, the first side of the second insulating heat sink is in direct contact with the first end portion of the second terminal, and the second side of the second insulating heat sink is in direct contact with the shell.

[0015] Optionally, in the electrical connection assembly as described above, the first stud and the second stud are fixed above the first end of the first terminal and the first end of the second terminal respectively by riveting; and / or

[0016] The first conductive pillar and the second conductive pillar are respectively fixed above the first end of the first terminal and the first end of the second terminal by welding; and / or

[0017] The first conductive column and the second conductive column are configured as annular conductive columns and are respectively sleeved on the outside of the first stud and the second stud.

[0018] Optionally, in the aforementioned electrical connection assembly, the first terminal and the second terminal are made of copper or tin-plated aluminum alloy; and / or

[0019] The outer sides of the first conductive pillar and the second conductive pillar are provided with a silver plating layer, a nickel plating layer or a tin plating layer; and / or

[0020] The housing is made of die-cast aluminum; and / or

[0021] The bracket is formed by plastic overmolding.

[0022] Optionally, in the electrical connection assembly as described above, fins for heat dissipation are provided below the portion of the shell that contacts the first insulating heat sink and the second insulating heat sink.

[0023] Optionally, in the electrical connection assembly as described above, the first terminal is a positive terminal, and the second terminal is a negative terminal.

[0024] Optionally, in the aforementioned electrical connection assembly, the first insulating heat dissipation member and the second insulating heat dissipation member are integrated into one body; and / or

[0025] The first insulating heat dissipation member and the second insulating heat dissipation member include at least one of thermally conductive insulating paper or thermally conductive insulating tape.

[0026] Optionally, in the electrical connection assembly as described above, the bracket is fixed to the housing by bolt connection.

[0027] In addition, according to the present application, a power distribution unit is also provided, and the power distribution unit is provided with the above-mentioned electrical connection assembly.

[0028] In addition, according to the present application, a vehicle is also provided, which is equipped with the above-mentioned power distribution unit and battery stack.

[0029] It can be seen that the electrical connection assembly for the power distribution unit of the present application has a simple structure, is easy to install, and saves materials. The electrical connection assembly can quickly dissipate heat from the connection between the power distribution unit and the battery stack through the housing, thereby achieving the purpose of efficient cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The disclosure of this application will be more easily understood with reference to the accompanying drawings. Those skilled in the art will readily appreciate that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the figures represent similar components, where:

[0031] Figure 1 exemplarily showing a structural schematic diagram of an electrical connection assembly for a power distribution unit disclosed in the present application as viewed from a first perspective;

[0032] Figure 2 exemplarily showing a cross-sectional schematic diagram of the electrical connection assembly for a power distribution unit disclosed in the present application when installed in a housing of the power distribution unit;

[0033] Figure 3 exemplarily showing an exploded structural diagram of an electrical connection assembly for a power distribution unit disclosed in the present application;

[0034] Figure 4 exemplarily showing a cross-sectional schematic diagram of an electrical connection assembly for a power distribution unit disclosed in the present application;

[0035] Figure 5A partial structural diagram exemplarily showing a first terminal and a second terminal of an electrical connection assembly for a power distribution unit disclosed in the present application being interconnected with a first bus bar and a second bus bar respectively; and

[0036] Figure 6 The schematic diagram of the structure of the electrical connection assembly for the power distribution unit disclosed in the present application viewed from a second perspective is exemplarily shown. DETAILED DESCRIPTION

[0037] To make the above-mentioned purposes, features, and advantages of the present application more clearly understood, the following detailed description of specific embodiments of the present application is provided in conjunction with the accompanying drawings. First, it should be noted that directional terms such as "up," "down," "left," "right," "front," "rear," "inside," "outside," "top," and "bottom" mentioned or potentially mentioned in this specification are defined relative to the structures shown in the accompanying drawings. These are relative concepts and may vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] Fuel cell vehicles (FCVs) have become increasingly popular in recent years. In the propulsion systems of these vehicles, a power distribution unit (PDU) distributes the electrical power from the battery stack among various components of the vehicle, such as the motor, onboard transformer, heater, and air conditioning compressor.

[0040] Figure 1 The structure of the electrical connection assembly for the power distribution unit according to the present application is shown. Figure 2 and Figure 3It can be clearly seen that the power distribution unit 10 includes a shell 100, which is made of die-cast aluminum and a first bus bar 11 is arranged in the shell 100. The electrical connection assembly 200 is composed of components such as a bracket 210, a first terminal 220, a first stud 230, a first conductive column 240 and a first insulating heat dissipation member 250. The bracket 210 is fixed to the shell 100 in a detachable manner, such as a bolt connection. The first terminal 220 has a first end 221 for inputting power to the power distribution unit 10 and a second end 222 for introducing power from a battery stack (not shown). The first end 221 of the first terminal 220 is fixed to the bracket 210. For example, the bracket 210 can be made of plastic and fixed to the first end 221 of the first terminal 220 by an overmolding process. The second end 222 is electrically connected to the battery stack, for example, through a first copper column 223. The first stud 230 has a threaded hole (refer to Figure 4 ) and fixed above the first end portion 221 of the first terminal 220, for example, by means of pressure riveting, wherein the first busbar 11 is fixed to the first stud 230 by a first bolt 110. The first conductive post 240 is fixed above the first end portion 221 of the first terminal 220, for example, by means of welding, so as to ensure good conduction. In addition, the first conductive post 240 can be configured as an annular conductive post and sleeved on the outside of the first stud 230, wherein the first conductive post 240 maintains electrical connection with the first busbar 11, as shown in FIG. Figure 5 shown.

[0041] In the above embodiment, the first insulating heat dissipation member 250 can be made of a high-performance heat dissipation material with an insulating function, such as a TIM or a heat dissipation paste, and the first insulating heat dissipation member 250 is arranged below the first end portion 221 of the first terminal 220 to isolate the first end portion 221 of the first terminal 220 from the housing 100. The first insulating heat dissipation member 250 has a first side 251 and a second side, wherein the first side 251 of the first insulating heat dissipation member 250 is in direct contact with the first end portion 221 of the first terminal 220, that is, the first end portion 221 of the first terminal 220 is directly exposed from the bracket 210 (refer to FIG. 2 ). Figure 6 ); on the other hand, the second side of the first insulating heat sink 250 is in direct contact with the housing 100. Thus, it can be seen that the electrical connection assembly according to the present application can not only ensure mutual insulation between the first terminal and the housing via the first insulating heat sink, but also quickly conduct heat at the first terminal to the housing via the first insulating heat sink, thereby effectively solving the heat dissipation problem and ensuring the normal operation of the power distribution unit.

[0042] Continue to refer Figure 2 and Figure 4 A second busbar 12 is disposed within the housing 100 of the power distribution unit 10. The electrical connection assembly 200 further includes a second terminal 260, a second stud 270, a second conductive post 280, and a second insulating heat sink. The second terminal 260 has a first end 261 and a second end 262. The first end 261 of the second terminal 260 is secured to the bracket 210, and the second end 262 is electrically connected to the battery stack, for example, via a second copper post 263. The second stud 270 has a threaded hole and is secured above the first end 261 of the second terminal 260, for example, by rivet riveting. The second busbar 12 is secured to the second stud 270 by a second bolt 120. The second conductive post 280 is secured above the first end 261 of the second terminal 260, for example, by welding, to ensure good electrical conduction. Furthermore, the second conductive post 280 can be configured as a ring-shaped conductive post and sleeved around the second stud 270, wherein the second conductive post 280 maintains electrical connection with the second busbar 12. The second insulating heat sink can be made of a high-performance heat-dissipating material with insulating properties, such as a TIM or heat-dissipating paste. The second insulating heat sink is disposed below the first end 261 of the second terminal 260 to isolate the first end 261 of the second terminal 260 from the housing 100. The second insulating heat sink has a first side and a second side. The first side of the second insulating heat sink is in direct contact with the first end 261 of the second terminal 260, meaning that the first end 261 of the second terminal 260 is directly exposed from the bracket 210. The second side of the second insulating heat sink is in direct contact with the housing 100, ensuring that heat from the second terminal 260 is rapidly transferred to the housing 100 through the second insulating heat sink. In this case, the first terminal 220 can be a positive terminal, and the second terminal 260 can be a negative terminal.

[0043] It will be readily apparent to those skilled in the art that the first terminal 220 and the second terminal 260 are made of a conductive material such as copper. Furthermore, to save costs, the first terminal 220 and the second terminal 260 can also be made of a tin-plated aluminum alloy. Specifically, the first terminal 220 and the second terminal 260 are made of aluminum with a tinned exterior. Furthermore, the first conductive pillar 240 and the second conductive pillar 280 can be made of a conductive material such as copper, and the exteriors of the first conductive pillar 240 and the second conductive pillar 280 can be provided with a silver plating layer, a nickel plating layer, or a tin plating layer, thereby improving the conductivity of both the first conductive pillar 240 and the second conductive pillar 280.

[0044] Since the studs are arranged above the terminal and are not associated with the housing 100, there is no need to reserve space inside the housing 100 for the rivet studs, so the thickness of the housing 100 can be set relatively small. In addition, fins (not shown) for heat dissipation are provided below the portion of the housing 100 that contacts the first insulating heat dissipation member 250 and the second insulating heat dissipation member, so that the housing 100 can quickly dissipate heat into the air. As an optional solution, the first insulating heat dissipation member 250 and the second insulating heat dissipation member are integrated into one body, such as Figure 3 For another example, the first insulating heat dissipation member 250 and the second insulating heat dissipation member include thermally conductive insulating paper, thermally conductive insulating tape or other similar components.

[0045] In addition, the present application also provides a power distribution unit 10 , which is provided with the above-mentioned electrical connection assembly 200 .

[0046] In addition, the present application also provides a vehicle, which is equipped with the above-mentioned power distribution unit 10 and battery stack. The vehicle can be a hydrogen energy vehicle.

[0047] In summary, the electrical connection assembly for a power distribution unit of the present application ensures good insulation by placing the exposed terminals in direct contact with the housing. This allows heat from the higher-temperature terminals to be transferred directly to the lower-temperature housing via a highly heat-dissipating insulating medium, thereby achieving efficient heat dissipation. Furthermore, the use of the electrical connection assembly simplifies the structure and saves material and space. Therefore, it is highly recommended that this electrical connection assembly be incorporated into a power distribution unit and promoted for use in vehicles.

[0048] Several specific embodiments have been listed above to illustrate in detail the electrical connection assembly for a power distribution unit, the power distribution unit, and the vehicle of the present application. These examples are intended only to illustrate the principles and implementation methods of the present application and are not intended to limit the present application. Persons skilled in the art may make various modifications and improvements without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions are intended to fall within the scope of the present application and are defined by the claims of the present application.

Claims

1. An electrical connection assembly for a power distribution unit, the power distribution unit (10) comprising a housing (100), a first bus bar (11) being arranged in the housing (100), characterized in that: The electrical connection assembly (200) comprises: a bracket (210) fixed to the housing (100) in a detachable manner; a first terminal (220) having a first end (221) and a second end (222), wherein the first end (221) of the first terminal (220) is fixed to the bracket (210); a first stud (230) having a threaded hole and fixed above the first end (221) of the first terminal (220), wherein the first busbar (11) is fixed to the first stud (230) by a first bolt (110); a first conductive column (240) fixed above the first end portion (221) of the first terminal (220) and electrically connected to the first bus bar (11); and A first insulating heat dissipation member (250) is located below the first end portion (221) of the first terminal (220) and is used to isolate the first end portion (221) of the first terminal (220) from the housing (100), and the first insulating heat dissipation member (250) has a first side (251) and a second side, the first side (251) of the first insulating heat dissipation member (250) is in direct contact with the first end portion (221) of the first terminal (220), and the second side of the first insulating heat dissipation member (250) is in direct contact with the housing (100).

2. The electrical connection assembly according to claim 1, wherein: A second bus bar (12) is provided in the housing (100), wherein the electrical connection assembly (200) further comprises: a second terminal (260) having a first end (261) and a second end (262), wherein the first end (261) of the second terminal (260) is fixed to the bracket (210); a second stud (270) having a threaded hole and fixed above the first end (261) of the second terminal (260), wherein the second bus bar (12) is fixed to the second stud (270) by a second bolt (120); a second conductive column (280) fixed above the first end (261) of the second terminal (260) and electrically connected to the second bus bar (12); and A second insulating heat sink is located below the first end (261) of the second terminal (260) and is used to isolate the first end (261) of the second terminal (260) from the housing (100), and the second insulating heat sink has a first side and a second side, the first side of the second insulating heat sink is in direct contact with the first end (261) of the second terminal (260), and the second side of the second insulating heat sink is in direct contact with the housing (100).

3. The electrical connection assembly according to claim 2, wherein: The first stud (230) and the second stud (270) are fixed above the first end (221) of the first terminal (220) and the first end (261) of the second terminal (260) respectively by means of riveting; and / or The first conductive column (240) and the second conductive column (280) are respectively fixed above the first end portion (221) of the first terminal (220) and the first end portion (261) of the second terminal (260) by welding; and / or The first conductive column (240) and the second conductive column (280) are configured as annular conductive columns and are respectively sleeved on the outside of the first stud (230) and the second stud (270).

4. The electrical connection assembly according to claim 2 or 3, characterized in that: The first terminal (220) and the second terminal (260) are made of copper or tin-plated aluminum alloy; and / or The outer sides of the first conductive column (240) and the second conductive column (280) are provided with a silver plating layer, a nickel plating layer or a tin plating layer; and / or The housing (100) is made of die-cast aluminum; and / or The bracket (210) is formed by plastic overmolding.

5. The electrical connection assembly according to claim 2 or 3, characterized in that: Fins for heat dissipation are provided below the portion of the housing (100) that contacts the first insulating heat dissipation member (250) and the second insulating heat dissipation member.

6. The electrical connection assembly according to claim 2 or 3, characterized in that: The first terminal (220) is a positive terminal, and the second terminal (260) is a negative terminal.

7. The electrical connection assembly according to claim 2 or 3, characterized in that: The first insulating heat dissipation member (250) and the second insulating heat dissipation member are integrated into one body; and / or The first insulating heat dissipation member (250) and the second insulating heat dissipation member include at least one of thermally conductive insulating paper or thermally conductive insulating tape.

8. The electrical connection assembly according to any one of claims 1 to 3, characterized in that: The bracket (210) is fixed to the housing (100) by means of bolt connection.

9. A power distribution unit, characterized in that: The power distribution unit (10) is provided with an electrical connection assembly (200) according to any one of claims 1-8.

10. A vehicle, characterized in that: The vehicle is equipped with a power distribution unit (10) according to claim 9 and a battery stack.

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