Voltage detection device and battery module

Patent metadata

Field	Value
Publication number	US-12546830-B2
Application number	US-202217935388-A
Country	US
Kind code	B2
Filing date	Sep 26, 2022
Priority date	Sep 29, 2021
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A first voltage detection device includes a plurality of first voltage detection portions connected to a plurality of lead portions of a plurality of battery cells, a first holding body holding the plurality of first voltage detection portions, and an insulator provided at the first holding body, at least a portion of the insulator being located between the different lead portions.

First claim

What is claimed is:

1 . A battery module comprising:
a plurality of battery cells, each of the plurality of battery cells including a positive electrode lead and a negative electrode lead, and a voltage detection device located on one side of the plurality of battery cells, wherein at least one positive electrode lead of at least one battery cell and at least one negative electrode lead of at least another one battery cell are connected on the one side to form a lead portion, the voltage detection device includes a voltage detection portion connected to the lead portion, a holding body holding the voltage detection portion, and an insulator provided at the holding body, at least a portion of the insulator is located between a pair of lead portions including the lead portion, and the lead portion includes a portion where the at least one positive electrode lead and the at least one negative electrode lead overlap each other.

2 . The battery module according to claim 1 , further comprising a housing body housing the plurality of battery cells, wherein
at least another portion of the insulator is located between the lead portion and at least a conductive portion of the housing body.

3 . The battery module according to claim 1 , wherein
the holding body includes a frame surrounding the lead portion and the voltage detection portion, and the frame includes the insulator.

4 . The battery module according to claim 1 , wherein
a plurality of positive electrode leads of at least two battery cells and a plurality of negative electrode leads of at least another two battery cells are connected on the one side to form the lead portion.

5 . The battery module according to claim 1 , wherein
each of the plurality of battery cells includes a positive electrode, a negative electrode, a separator, an exterior material housing the positive electrode, the negative electrode, and the separator, the positive electrode lead is electrically connected to the positive electrode and drawn from the exterior material, and the negative electrode lead electrically connected to the negative electrode and drawn from the exterior material.

6 . The battery module according to claim 1 , wherein
the voltage detection portion and the portion of the lead portion overlap each other.

7 . The battery module according to claim 1 , wherein
the at least one positive electrode lead and the at least one negative electrode lead are connected by laser welding.

8 . The battery module according to claim 1 , wherein
the portion of the lead portion and the voltage detection portion are connected by laser welding.

9 . The battery module according to claim 1 , wherein
the at least one positive electrode lead and the at least one negative electrode lead are directly connected to each other.

10 . The battery module according to claim 1 , wherein
the portion of the lead portion and the voltage detection portion are directly connected to each other.

11 . The battery module according to claim 1 , wherein
the at least one positive electrode lead and the at least one negative electrode lead are bonded to each other.

12 . The battery module according to claim 1 , wherein
the portion of the lead portion and the voltage detection portion are bonded to each other.

13 . A battery module comprising:
a plurality of battery cells, each of the plurality of battery cells including a positive electrode lead and a negative electrode lead, and a voltage detection device located on one side of the plurality of battery cells, wherein at least one positive electrode lead of at least one battery cell and at least one negative electrode lead of at least another one battery cell are connected on the one side to form a lead portion, the voltage detection device includes a voltage detection portion connected to the lead portion, a holding body holding the voltage detection portion, and an insulator provided at the holding body, at least a portion of the insulator is located between a pair of lead portions including the lead portion, and the at least one positive electrode lead and the at least one negative electrode lead are connected by laser welding.

14 . A battery module comprising:
a plurality of battery cells, each of the plurality of battery cells including a positive electrode lead and a negative electrode lead, and a voltage detection device located on one side of the plurality of battery cells, wherein at least one positive electrode lead of at least one battery cell and at least one negative electrode lead of at least another one battery cell are connected on the one side to form a lead portion, the voltage detection device includes a voltage detection portion connected to the lead portion, a holding body holding the voltage detection portion, and an insulator provided at the holding body, at least a portion of the insulator is located between a pair of lead portions including the lead portion, and the at least one positive electrode lead and the at least one negative electrode lead are directly connected to each other.

15 . A battery module comprising:
a plurality of battery cells, each of the plurality of battery cells including a positive electrode lead and a negative electrode lead, and a voltage detection device located on one side of the plurality of battery cells, wherein at least one positive electrode lead of at least one battery cell and at least one negative electrode lead of at least another one battery cell are connected on the one side to form a lead portion, the voltage detection device includes a voltage detection portion connected to the lead portion, a holding body holding the voltage detection portion, and an insulator provided at the holding body, at least a portion of the insulator is located between a pair of lead portions including the lead portion, and the at least one positive electrode lead and the at least one negative electrode lead are bonded to each other.

16 . The battery module according to claim 7 , wherein
the at least one positive electrode lead and the at least one negative electrode lead are directly connected to each other.

17 . The battery module according to claim 7 , wherein
the at least one positive electrode lead and the at least one negative electrode lead are bonded to each other.

18 . The battery module according to claim 16 , wherein
the at least one positive electrode lead and the at least one negative electrode lead are bonded to each other.

19 . The battery module according to claim 13 , wherein
the at least one positive electrode lead and the at least one negative electrode lead are directly connected to each other.

20 . The battery module according to claim 13 , wherein
the at least one positive electrode lead and the at least one negative electrode lead are bonded to each other.

Assignees

• Aesc Japan Ltd

Inventors

• IZAWA Takami
• Amagai Ryuichi
• Nakai Masayuki
• Toyosaki Shinkichi
• Yanagihara Yasuhiro

Classifications

• H01M10/482 Primary

  for several batteries or cells simultaneously or sequentially · CPC title

• H01M50/531

  Electrode connections inside a battery casing · CPC title

• G01R31/364

  Battery terminal connectors with integrated measuring arrangements · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M50/298

  characterised by the wiring of battery packs · CPC title