Battery system and method for determining abnormality of battery

Patent metadata

Field	Value
Publication number	US-11817565-B2
Application number	US-202117171097-A
Country	US
Kind code	B2
Filing date	Feb 9, 2021
Priority date	Feb 17, 2020
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

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 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 battery system 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. A battery system 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 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.

5. A method for determining an abnormality of 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, the method comprising:
a first voltage measuring step of measuring, by a first voltage sensor, a first voltage that is a voltage between a terminal of a reference cell belonging to the plurality of the laminated cell, and the plate,
a second voltage measuring step of measuring, by a second voltage sensor, 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
a first determining step of determining, by an electronic control unit, an abnormality based on the first voltage and the second voltage.

6. A method for determining an abnormality of 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, the method comprising:
a first voltage measuring step of measuring, by a first voltage sensor, a first voltage that is a voltage between a terminal of a reference cell belonging to the plurality of the laminated cell, and the plate,
a supplemental voltage measuring step of measuring, by a supplemental voltage sensor, 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 from the plate, and
a second determining step of determining, by an electronic control unit, 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

• H01M10/482 Primary

  for several batteries or cells simultaneously or sequentially · CPC title

• H02J7/005

  Electricity · mapped topic