Fireproof component, battery pack, and device using battery as power supply

Patent metadata

Field	Value
Publication number	US-12107288-B2
Application number	US-202217715783-A
Country	US
Kind code	B2
Filing date	Apr 7, 2022
Priority date	Oct 10, 2019
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

This application provides a fireproof component, a battery pack, and a device using the battery pack as a power supply. The fireproof component includes a main body and a frame. The frame includes a body portion, an extension portion, and an opening defined by an inner peripheral face of the body portion. The extension portion is located circumferentially outside the body portion and connected to the body portion. The extension portion extends along a third direction that is perpendicular to a plane defined by the frame and protrudes beyond the body portion. The main body covers the opening of the frame and is connected to the body portion. The main body and the frame of the fireproof component are parts independent of each other, and therefore, can be made of different materials and in different molding processes.

First claim

What is claimed is:

1. A fire proof component for use in a battery pack, the fireproof component comprising a main body and a frame;
wherein the frame comprises a body portion, an extension portion, and an opening defined by an inner peripheral face of the body portion, the extension portion is located outside the body portion along a circumferential direction of the body portion and connected to an outer peripheral face of the body portion, and the extension portion extends along a third direction and protrudes beyond the body portion; and
the main body covers the opening of the frame and is connected to the body portion;
wherein the main body is a mica board;
the battery module further comprises a plurality of batteries, and an explosion-proof valve is disposed in each of the batteries; and
a first part of the main body corresponds to the explosion-proof valves, a second part of the main body is located outside the explosion-proof valves, and the thickness of the first part of the main body is greater than the thickness of the second part of the main body.

2. The fireproof component according to claim 1 , wherein
in the third direction, the main body is located at one side of the body portion of the frame; or
the main body is accommodated in the opening.

3. The fireproof component according to claim 1 , wherein
in the third direction, the main body is located at one side of the body portion of the frame; and
a first connecting hole is disposed on the body portion, a second connecting hole is disposed on the main body, and the main body is connected to the body portion through the second connecting hole and the first connecting hole.

4. The fireproof component according to claim 3 , wherein
a third connecting hole is further disposed on the body portion of the frame, and the third connecting hole is disposed close to the extension portion in contrast with the first connecting hole; and
an avoidance notch is further disposed on the main body, and the avoidance notch is configured to expose the third connecting hole out of the main body.

5. The fireproof component according to claim 1 , wherein
the frame comprises a plurality of connecting pieces, the plurality of connecting pieces are spliced together in tandem, each of the connecting pieces comprises a first plate portion and a second plate portion, and the second plate portion extends along the third direction and protrudes beyond the first plate portion; and
the first plate portions of all the connecting pieces constitute the body portion of the frame, and the second plate portions of all the connecting pieces constitute the extension portion of the frame.

6. The fireproof component according to claim 5 , wherein each of the connecting pieces is a sheet metal part.

7. The fireproof component according to claim 5 , wherein, along a circumferential direction of the frame, a positioning slot is disposed at an end of one of two adjacent connecting pieces, and the positioning slot accommodates an end of the other of the two adjacent connecting pieces.

8. The fireproof component according to claim 5 , wherein the plurality of connecting pieces comprise two first connecting pieces and two second connecting pieces, the two first connecting pieces are spaced apart in a first direction, the two second connecting pieces are spaced apart in a second direction, and each of the second connecting pieces is connected to the two first connecting pieces.

9. The fireproof component according to claim 1 , wherein the main body is a mica board comprising a plurality of mica sheets and an adhesive disposed between every two adjacent mica sheets.

10. A battery pack, comprising a battery module and a fireproof component, wherein the fireproof component comprises a main body and a frame;
the frame comprises a body portion, an extension portion, and an opening defined by an inner peripheral face of the body portion, the extension portion is located outside the body portion along a circumferential direction of the body portion and connected to an outer peripheral face of the body portion, and the extension portion extends along a third direction and protrudes beyond the body portion;
the main body covers the opening of the frame and is connected to the body portion; and
the main body of the fireproof component and the body portion of the frame are located above the battery module, the extension portion is located outside the battery module along a circumferential direction of the battery module, and the body portion of the frame is fixedly connected to the battery module;
wherein the main body is a mica board;
the battery module further comprises a plurality of batteries, and an explosion-proof valve is disposed in each of the batteries; and
a first part of the main body corresponds to the explosion-proof valves, a second part of the main body is located outside the explosion-proof valves, and the thickness of the first part of the main body is greater than the thickness of the second part of the main body.

11. The battery pack according to claim 10 , wherein
the battery module is plural in number, and a plurality of battery modules are arranged in at least one row of module cells; and
the fireproof component is disposed on each row of module cells.

Assignees

• Contemporary Amperex Technology Co Ltd
• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Yang Shuo
• Lin Chengjin
• Wu Youxin
• Ji Jinqing

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• A62C3/16

  in electrical installations, e.g. cableways · CPC title

• H01M50/3425

  in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member · CPC title

• H01M50/383

  Flame arresting or ignition-preventing means · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title