Battery system and method for determining abnormality of battery

Patent metadata

Field	Value
Publication number	US-12095057-B2
Application number	US-202318374010-A
Country	US
Kind code	B2
Filing date	Sep 28, 2023
Priority date	Feb 17, 2020
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

A battery system, capable of detecting a pore generated in an outer package film in an early stage, includes: a battery including a plurality of laminated cells arranged along a thickness direction and connected in series, and a plate arranged between a pair of the laminated cells; a first voltage sensor configured to measure a first voltage between a terminal of a reference cell belonging to the plurality of laminated cells, and the plate; a second voltage sensor configured to measure a second voltage between a terminal of the reference cell, and among the pair of laminated cells facing the plate, the laminated cell in the reference cell side; and an electronic control unit including a first obtaining unit configured to obtain the first voltage from the first voltage sensor.

First claim

What is claimed is:

1. A vehicle having a battery system comprising:
a battery including a plurality of laminated cells arranged along a thickness direction and connected in series, and a plate arranged between a pair of the laminated cells,
a first voltage sensor configured to measure a first voltage that is a voltage between a terminal of a reference cell belonging to the plurality of laminated cells, and the plate,
a second voltage sensor configured to measure a second voltage that is a voltage between the terminal of the reference cell and, among the pair of laminated cells that the plate is between, a laminated cell on a reference cell side of the plate, and
an electronic control unit; and

the electronic control unit includes:
a first obtaining unit configured to obtain the first voltage from the first voltage sensor,
a second obtaining unit configured to obtain the second voltage from the second voltage sensor, and
a first determining unit configured to determine an abnormality based on the first voltage and the second voltage.

2. The vehicle according to claim 1 , wherein
the battery system further comprises a third voltage sensor configured to measure a third voltage that is a voltage between the terminal of the reference cell and, among the pair of laminated cells that the plate is between, a laminated cell on an opposite side of the plate from the reference cell side of the plate, and

the electronic control unit further includes:
a third obtaining unit configured to obtain the third voltage from the third voltage sensor, and
a second determining unit configured to determine an abnormality based on the first voltage and the third voltage when the first determining unit determines an abnormality.

3. The vehicle according to claim 1 , wherein the battery includes a plurality of plates, and
the electronic control unit is configured to select the plate for measuring the first voltage from the plurality of plates.

4. A vehicle having a battery system comprising:
a battery including a plurality of laminated cells arranged along a thickness direction and connected in series, and a plate arranged between a pair of the laminated cells,
a first voltage sensor configured to measure a first voltage that is a voltage between a terminal of a reference cell belonging to the plurality of laminated cells, and the plate,
a supplemental voltage sensor configured to measure a supplemental voltage that is a voltage between the terminal of the reference cell and, among the pair of laminated cells that the plate is between, a laminated cell on an opposite side from a reference cell side of the plate, and
an electronic control unit; and

the electronic control unit includes:
a first obtaining unit configured to obtain the first voltage from the first voltage sensor,
a supplemental obtaining unit configured to obtain the supplemental voltage from the supplemental voltage sensor, and
a second determining unit configured to determine an abnormality based on the first voltage and the supplemental voltage.

Assignees

• Toyota Motor Co Ltd

Inventors

• Komiyama Keita

Classifications

• H02J7/84

  Control of state of health [SOH] · CPC title

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/80

  including monitoring or indicating arrangements · CPC title

• H01M2220/20

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

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title