Battery cell, battery, and electric apparatus

Patent metadata

Field	Value
Publication number	US-2025070426-A1
Application number	US-202418947118-A
Country	US
Kind code	A1
Filing date	Nov 14, 2024
Priority date	Sep 21, 2022
Publication date	Feb 27, 2025
Grant date	—

Abstract

A battery cell, a battery, and an electric apparatus are described. A sampling module is connected to a housing and electrically connected to a conductor. At least one conductor is disposed on the housing and electrically connected to an electrode terminal. When status signals from the battery cell are collected, signals from at least one collection point of the sampling module are directly transmitted by the electrode terminal. In this way, the sampling module is integrated on the end cover and at least one conductor is electrically connected to the electrode terminal, which changes the conventional method of transmitting signals to CMC through a flexible circuit board and wiring harness, avoids the transmission of status signals from being affected by factors such as interference coupling and wiring harness short-circuiting, shortens the signal transmission path, and improves the reliability of signal collection by the sampling module.

First claim

1 . A battery cell, comprising:
a housing; an electrode terminal; at least one conductor, disposed on the housing and electrically connected to the electrode terminal; and a sampling module, connected to the housing and electrically connected to the conductor.

2 . The battery cell according to claim 1 , wherein the sampling module has at least one conductive portion, and when the sampling module is connected to the housing, the conductive portion is electrically connected to the conductor.

3 . The battery cell according to claim 2 , wherein the housing is provided with a connecting member, the connecting member is electrically connected to the conductor, and when the sampling module is connected to the housing, the conductive portion is electrically connected to the connecting member.

4 . The battery cell according to claim 3 , wherein the housing has a mounting region, the connecting member is located in the mounting region, and the sampling module is mounted in the mounting region.

5 . The battery cell according to claim 4 , wherein the sampling module is detachably mounted in the mounting region.

6 . The battery cell according to claim 4 , wherein the battery cell further comprises a limiting structure disposed on the housing, wherein the limiting structure is constructed to limit the sampling module within the mounting region and to crimp the conductive portion onto the connecting member accordingly.

7 . The battery cell according to claim 6 , wherein the limiting structure comprises a first limiting piece, wherein the first limiting piece and the connecting member are spaced apart within the mounting region along a preset direction, the preset direction being perpendicular to a thickness direction of the housing in the mounting region, and the first limiting piece limits one end of the sampling module in the preset direction.

8 . The battery cell according to claim 7 , wherein the limiting structure further comprises a second limiting piece, wherein the second limiting piece limits a side face of the sampling module facing away from the mounting region.

9 . The battery cell according to claim 8 , wherein at least one of the first limiting piece and the second limiting piece is movable or deformable to allow the sampling module to be limited or released within the mounting region.

10 . The battery cell according to claim 9 , wherein the mounting region is provided with a first concave portion, wherein the first limiting piece is disposed on an inner wall of the first concave portion and at least partially protrudes from the first concave portion, and the first limiting piece is constructed to be elastically pressed into the first concave portion.

11 . The battery cell according to claim 10 , wherein in the thickness direction of the housing in the mounting region, there is a mounting gap between the second limiting piece and the mounting region, the mounting gap being constructed to allow the sampling module squeezing the first limiting piece to move along the preset direction, and when the sampling module moves to a point where the conductive portion is crimped onto the connecting member, the first limiting piece springs up and limits one end of the sampling module.

12 . The battery cell according to claim 11 , wherein the sampling module is provided with a notch, wherein the notch is configured for the sampling module to pass through the second limiting piece.

13 . The battery cell according to claim 10 , wherein the connecting member comprises a connecting piece electrically connected to the conductor, the mounting region is provided with a second concave portion spaced apart from the first concave portion along the preset direction, and the connecting piece is elastically disposed on the inner wall of the second concave portion and at least partially protrudes from the second concave portion.

14 . The battery cell according to claim 13 , wherein in the same connecting member, the connecting piece is provided in at least two, and all the connecting pieces are spaced apart on an inner wall of the second concave portion and electrically connected to the same conductor.

15 . The battery cell according to claim 6 , wherein the limiting structure further comprises a third limiting piece, wherein the third limiting piece is located at an end of the mounting region close to the connecting member, and a limiting gap is left between the third limiting piece and the mounting region.

16 . The battery cell according to claim 4 , wherein the connecting member is electrically plugged in the conductive portion.

17 . The battery cell according to claim 16 , wherein the conductive portion comprises a plug-in protrusion protruding from a surface of the sampling module, wherein the plug-in protrusion is plug-fitted with the connecting member.

18 . The battery cell according to claim 17 , wherein the connecting member comprises a first clamping piece and second clamping piece disposed in the mounting region, wherein the plug-in protrusion is inserted between the first clamping piece and the second clamping piece.

19 . The battery cell according to claim 17 , wherein the connecting member comprises a conductive elastic piece disposed in the mounting region, a plug-in hole extending along the thickness direction of the housing in the mounting region is formed in the mounting region, the plug-in protrusion is plug-fitted with the plug-in hole, the conductive elastic piece is disposed on a side wall of the plug-in hole and abuts against the plug-in protrusion under the elastic force of the conductive elastic piece, and the conductor is electrically connected to the plug-in protrusion through the conductive elastic piece.

20 . The battery cell according to claim 4 , wherein the battery cell further comprises a fastener, the sampling module is provided with a through hole extending along the thickness direction of the housing, and the fastener passes through the through hole to be connected to the mounting region of the housing.

21 . The battery cell according to claim 19 , wherein the electrode terminal, the plug-in protrusion, the conductor, and the plug-in hole are all provided in two, wherein the two plug-in protrusions and the two plug-in holes are both spaced apart along the preset direction, the preset direction is perpendicular to the thickness direction of the housing in the mounting region, one electrode terminal is electrically connected to one conductive elastic piece through one conductor, one conductive elastic piece is electrically connected to one plug-in protrusion, the other electrode terminal is electrically connected to the other conductive elastic piece through the other conductor, and the other conductive elastic piece is electrically connected to the other plug-in protrusion.

22 . The battery cell according to claim 20 , wherein the number of conductive elastic pieces in the plug-in hole is two, and the two conductive elastic pieces are located on opposite sides of the plug-in protrusion.

23 . The battery cell according to claim 4 , wherein the housing is provided with a mounting groove, wherein the mounting region is a bottom wall of the mounting groove.

24 . The battery cell according to claim 1 , wherein the housing comprises a shell and an end cover covering the shell, wherein the sampling module, the electrode terminal, and the conductor are all connected to the end cover.

25 . The battery

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Kang Hairong
• He Jia
• Zheng Chenling
• Wang Chong
• Zhou Fangjie

Classifications

• H01M50/55

  on the same side of the cell · CPC title

• H01M50/147

  Lids or covers · CPC title

• H01M50/172

  Arrangements of electric connectors penetrating the casing · CPC title

• H01M50/569 Primary

  Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals (battery terminal connectors with integrated measuring arrangements G01R31/364) · 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