Power distribution device and transportation device having power distribution device

Patent metadata

Field	Value
Publication number	US-12570150-B2
Application number	US-202318522015-A
Country	US
Kind code	B2
Filing date	Nov 28, 2023
Priority date	Aug 2, 2021
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

A power distribution device and a transportation device having the power distribution device are provided. The power distribution device includes a housing, a pre-charging circuit module, and a main positive circuit module. The housing has a mounting cavity. The pre-charging circuit module is configured to pre-charge a capacitor element in an electrical appliance, and includes a pre-charging relay. The pre-charging relay is connected with the housing. The main positive circuit module is configured to be closed after the pre-charging circuit module is opened. The main positive circuit module and the pre-charging circuit module are stacked in the mounting cavity in an up-down direction. The main positive circuit module includes a fuse and a main relay core. The main relay core is connected with the housing.

First claim

What is claimed is:

1 . A power distribution device, comprising:
a housing, having a mounting cavity; a pre-charging circuit module, configured to pre-charge a capacitor element in an electrical appliance and comprising a pre-charging relay, the pre-charging relay being connected with the housing; and a main positive circuit module, configured to be closed after the pre-charging circuit module is opened, the main positive circuit module and the pre-charging circuit module being stacked in the mounting cavity in an up-down direction, the main positive circuit module comprising a fuse and a main relay core, and the main relay core being connected with the housing; the power distribution device having an input terminal and a first output terminal, a first end of the fuse being the input terminal or connected with the input terminal, a second end of the fuse being connected with a first end of the main relay core, a second end of the main relay core being the first output terminal or connected with the first output terminal, a first end of the pre-charging circuit module being connected with the input terminal or the second end of the fuse, and a second end of the pre-charging circuit module being connected with the second end of the main relay core or the first output terminal, wherein the housing comprises a bottom shell and a surface cover; the surface cover is connected with the bottom shell through a snap-fit structure or a locking member to form the mounting cavity; the pre-charging relay is connected with the bottom shell through the clamping structure; and the main relay core is connected with the bottom shell through the potting structure, and wherein the surface cover is provided with a first mounting hole corresponding to an upper part of the pre-charging relay; the surface cover is provided with a second mounting hole and a third mounting hole corresponding to an upper part of the main relay core; the surface cover is provided with a mounting window for the fuse to be placed; the pre-charging relay is located below the first mounting hole; a first end of the fuse extends to a position above the first mounting hole; the second end of the fuse extends to a position above the second mounting hole; the first end of the main relay core is located below the second mounting hole; the second end of the main relay core is located below the third mounting hole; and the second end of the fuse is connected with the first end of the main relay core through a first locking member passing through the second mounting hole.

2 . The power distribution device according to claim 1 , wherein the pre-charging circuit module further comprises a pre-charging resistor; the pre-charging relay and the main relay core are respectively seated to two ends of the mounting cavity; the fuse and the pre-charging resistor are arranged between the pre-charging relay and the main relay core; the pre-charging resistor is seated to a bottom of the mounting cavity; and the fuse is located above the pre-charging resistor.

3 . The power distribution device according to claim 2 , wherein the fuse and the pre-charging resistor are close to the pre-charging relay and the main relay core.

4 . The power distribution device according to claim 1 , wherein the pre-charging relay is connected with the housing through a clamping structure or a potting structure; and the main relay core is connected with the housing through a potting structure or a clamping structure.

5 . The power distribution device according to claim 4 , wherein the potting structure is formed through solidification of potting adhesive.

6 . The power distribution device according to claim 1 , further having a second output terminal, and comprising a connecting wire harness, a first end of the connecting wire harness being inserted into the pre-charging relay through a first connecting terminal, and a second end of the connecting wire harness being the second output terminal.

7 . The power distribution device according to claim 6 , wherein the second end of the connecting wire harness is a connecting copper bar terminal.

8 . The power distribution device according to claim 6 , wherein the first connecting terminal is an insert terminal.

9 . The power distribution device according to claim 6 , wherein the input terminal is a current input terminal; and the first output terminal and the second output terminal are current output terminals.

10 . A power distribution device, comprising:
a housing, having a mounting cavity; a pre-charging circuit module, configured to pre-charge a capacitor element in an electrical appliance and comprising a pre-charging relay, the pre-charging relay being connected with the housing; and a main positive circuit module, configured to be closed after the pre-charging circuit module is opened, the main positive circuit module and the pre-charging circuit module being stacked in the mounting cavity in an up-down direction, the main positive circuit module comprising a fuse and a main relay core, and the main relay core being connected with the housing; the power distribution device having an input terminal and a first output terminal, a first end of the fuse being the input terminal or connected with the input terminal, a second end of the fuse being connected with a first end of the main relay core, a second end of the main relay core being the first output terminal or connected with the first output terminal, a first end of the pre-charging circuit module being connected with the input terminal or the second end of the fuse, and a second end of the pre-charging circuit module being connected with the second end of the main relay core or the first output terminal, wherein the pre-charging circuit module further comprises a pre-charging resistor; the pre-charging relay and the main relay core are respectively seated to two ends of the mounting cavity; the fuse and the pre-charging resistor are arranged between the pre-charging relay and the main relay core; the pre-charging resistor is seated to a bottom of the mounting cavity; and the fuse is located above the pre-charging resistor, and wherein a first end of the pre-charging resistor is inserted into the pre-charging relay through a second connecting terminal; a resistor wire harness is connected with a second end of the pre-charging resistor; the housing is provided with a wire slot for accommodating the resistor wire harness; and the second end of the pre-charging resistor is arranged above the second end of the fuse.

11 . The power distribution device according to claim 10 , wherein the first end of the pre-charging resistor is inserted into a body of the pre-charging relay through the second connecting terminal.

12 . The power distribution device according to claim 10 , wherein the second connecting terminal is an insert terminal.

13 . The power distribution device according to claim 1 , wherein the first end of the fuse is the input terminal and is provided with a first hole for a fastening screw to pass through; and the first output terminal is provided with a second hole for a fastening screw to pass through.

14 . The power distribution device according to claim 13 , wherein the input terminal is connected with a battery through the fastening screw; and the first output terminal is connected with the electrical appliance through the fastening screw.

15 . The power distribution device according to claim 1 , wherein an upper end of the surface cover is provided with a baffle; and the second mounting hole and the third mounting hole are respectively located on two sides of the baffle.

Assignees

• Byd Co Ltd

Inventors

• Wu Zhenhan
• Zeng Zhi

Classifications

• H02J7/345

  using capacitors as storage or buffering devices · CPC title

• H02B1/26

  Casings; Parts thereof or accessories therefor · CPC title

• H02B1/20

  Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards (installations of bus-bars H02G5/00) · CPC title

• H02B1/48

  Mounting of devices therein · CPC title

• B60K1/04

  of the electric storage means for propulsion · CPC title