Cell supervision circuit and battery pack

Patent metadata

Field	Value
Publication number	US-2020161605-A1
Application number	US-201916422863-A
Country	US
Kind code	A1
Filing date	May 24, 2019
Priority date	Nov 15, 2018
Publication date	May 21, 2020
Grant date	—

Abstract

The disclosure relates to a cell supervision circuit and a battery pack. The cell supervision circuit comprises a circuit board; a heat transfer unit including a metal plate disposed adjacent to the circuit board, wherein the heat transfer unit dissipates heat through the metal plate; and a fixing plate connected to the heat transfer unit, wherein the fixing plate includes a body portion and an elastic portion formed on the body portion, and the elastic portion is used for filling a gap between the metal plate and the fixing plate. In the cell supervision circuit according to the embodiment of the disclosure, the problem of heat resistance instability generated during heat dissipation is solved, and the heat dissipation effect of the cell supervision circuit is improved.

First claim

What is claimed is:

1 . A cell supervision circuit, comprising:
a circuit board; a heat transfer unit including a metal plate disposed adjacent to the circuit board, wherein the heat transfer unit dissipates heat through the metal plate; and a fixing plate connected to the heat transfer unit, wherein the fixing plate includes a body portion and an elastic portion formed on the body portion, and the elastic portion is used for filling a gap between the metal plate and the fixing plate.

2 . The cell supervision circuit according to claim 1 , wherein the body portion of the fixing plate has a surface and a second surface that are opposite to each other, the first surface is disposed adjacent to the metal plate, and the elastic portion is formed by being recessed from the body portion in a direction from the second surface to the first surface.

3 . The cell supervision circuit according to claim 2 , wherein notches are provided on both sides of the elastic portion, and the notches penetrates through the body portion.

4 . The cell supervision circuit according to claim 3 , wherein the elastic portion comprises two connecting members which are disposed to be spaced apart from each other, each connecting member has one end which is hung with respect to the main body.

5 . The cell supervision circuit according to claim 3 , wherein a groove is provided in the elastic portion, and the groove is formed by being recessed from the elastic portion in a direction from the first surface to the second surface.

6 . The cell supervision circuit according to claim 1 , wherein the number of the elastic portion is one or more, and the metal plate is fixedly connected to the elastic portion.

7 . The cell supervision circuit according to claim 6 , wherein the heat transfer unit further includes a backing plate for supporting the metal plate, a stepped groove is provided in the backing plate, and the metal plate is fitted into the stepped groove and is in contact with the elastic portion.

8 . The cell supervision circuit according to claim 7 , wherein two or more ribs are provided in the stepped groove to support the metal plate.

9 . The cell supervision circuit according to claim 1 , wherein a heat-conducting pad is further provided between the circuit board and the metal plate of the heat transfer unit.

10 . A battery pack, comprising a cell supervision circuit according to claim 1 .

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Ruan Shengshen
• Wang Peng

Classifications

• H01M10/613

  Cooling or keeping cold · CPC title

• H01M10/667

  the system being an electronic component, e.g. a CPU, an inverter or a capacitor · CPC title

• H01M10/425 Primary

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• H05K1/0201

  Thermal arrangements, e.g. for cooling, heating or preventing overheating · CPC title

• H01M2/1016 Primary

  Electricity · mapped topic