Apparatus and method for inspecting all-solid battery

Patent metadata

Field	Value
Publication number	US-9903918-B2
Application number	US-201214385592-A
Country	US
Kind code	B2
Filing date	Apr 19, 2012
Priority date	Apr 19, 2012
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

An object of the present invention is to provide an apparatus for inspecting an all-solid battery with which a battery capacity where a voltage abnormality occurs can be grasped before the voltage abnormality occurs. The present invention is an apparatus for inspecting an all-solid battery including a storage section storing a relationship between the battery capacity where the voltage abnormality occurs and a resistance of the all-solid battery, and a resistance calculation section calculating the resistance based on a current and voltage in charging the all-solid battery, wherein the battery capacity where the voltage abnormality occurs in the all-solid battery is calculated from the relationship stored in the storage section and the resistance calculated in the resistance calculation section.

First claim

The invention claimed is:

1. An apparatus for inspecting an all-solid battery, the all-solid battery including a solid electrolyte layer, the apparatus comprising:
a storage section storing a relationship between an all-solid battery capacity at which a voltage abnormality occurs in another all-solid battery having the same materials as the all-solid battery and a resistance of the other all-solid battery, wherein the voltage abnormality is a rapid lowering of the voltage of the all-solid battery that causes destruction to the all-solid battery; and
a resistance calculation section that, when a state of charge of the all-solid battery is in a range of 0% to 20%, calculates a resistance based on a measured current and measured voltage while charging the all-solid battery, wherein an all-solid battery capacity at which the voltage abnormality occurs in the all-solid battery is determined based on the relationship stored in the storage section and the resistance calculated by the resistance calculation section.

2. The apparatus for inspecting the all-solid battery according to claim 1 , wherein the resistance calculation section calculates the resistance based on a current and voltage in charging at a constant current.

3. The apparatus for inspecting the all-solid battery according to claim 2 , wherein a charging rate of the constant current is 10 C or less.

4. An apparatus for inspecting an all-solid battery, the all-solid battery including a solid electrolyte layer, the apparatus comprising:
a processor programmed to:
store a relationship between an all-solid battery capacity at which a voltage abnormality occurs in another all-solid battery having the same materials as the all-solid battery and a resistance of the other all-solid battery, wherein the voltage abnormality is a rapid lowering of the voltage of the all-solid battery that causes destruction to the all-solid battery; and
when a state of charge of the all-solid battery is in a range of 0% to 20%:
calculate a resistance based on a measured current and a measured voltage while charging the all-solid battery; and
determine, based on the stored relationship and the calculated resistance, an all-solid battery capacity at which the voltage abnormality occurs in the all-solid battery.

5. The apparatus for inspecting the all-solid battery according to claim 4 , wherein the processor is programmed to calculate the resistance based on a current and voltage in charging at a constant current.

6. The apparatus for inspecting the all-solid battery according to claim 5 , wherein a charging rate of the constant current is 10 C or less.

7. The apparatus for inspecting an all-solid battery according to claim 1 , wherein, based on the determined all-solid battery capacity, a charging rate in rapid charging is reduced from an initial plan.

8. The apparatus for inspecting an all-solid battery according to claim 1 , wherein, based on the determined all-solid battery capacity, the apparatus indicates that the all-solid battery should be replaced with another all-solid battery in which an occurrence of the voltage abnormality is not presumed.

9. The apparatus for inspecting an all-solid battery according to claim 4 , wherein the processor is further programmed to: based on the determined all-solid battery capacity, reduce a charging rate in rapid charging from an initial plan.

10. The apparatus for inspecting an all-solid battery according to claim 4 , wherein the processor is further programmed to: based on the determined all-solid battery capacity, indicate that the all-solid battery should be replaced with another all-solid battery in which an occurrence of the voltage abnormality is not presumed.

Assignees

• Ose Norihiro
• Toyota Motor Co Ltd

Inventors

• Ose Norihiro

Classifications

• G01R31/3865

  related to manufacture, e.g. testing after manufacture · CPC title

• G01R31/389 Primary

  Measuring internal impedance, internal conductance or related variables · CPC title

• G01R31/382

  Arrangements for monitoring battery or accumulator variables, e.g. SoC · CPC title

• G01R31/367

  Software therefor, e.g. for battery testing using modelling or look-up tables · CPC title

• G01R31/392

  Determining battery ageing or deterioration, e.g. state of health · CPC title