APPARATUS AND METHOD FOR INSPECTING ALL-SOLID BATTERY

• US 20150048838A1
• Filed: 04/19/2012
• Published: 02/19/2015
• Est. Priority Date: 04/19/2012
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ose, Norihiro
• Granted Patent: US 9,903,918 B2
• Time in Patent Office: Days
• US Class Current: 324/430
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: G01R 31/382 Arrangements for monitoring battery or accumulator variables, e.g. SoC
• CPC Class Codes: G01R 31/3842 combining voltage and current measurements
• CPC Class Codes: G01R 31/3865 related to manufacture, e.g. testing after manufacture
• CPC Class Codes: G01R 31/389 Measuring internal impedance, internal conductance or related variables
• CPC Class Codes: G01R 31/392 Determining battery ageing or deterioration, e.g. state of health

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.

Claims

1. An apparatus for inspecting an all-solid battery, the apparatus comprising:

a storage section storing a relationship between a battery capacity at which a voltage abnormality occurs in the all-solid battery 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 at which the voltage abnormality occurs in the all-solid battery is calculated from the relationship stored in the storage section and the resistance calculated by the resistance calculation section.

2. The apparatus for inspecting an all-solid battery according to claim 1, wherein the resistance calculation section calculates the resistance based on a current and voltage in charging the all-solid battery when a state of charge of the all-solid battery is 0% or more and 20% or less.

3. The apparatus for inspecting an 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.

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

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

10. The apparatus for inspecting an all-solid battery according to claim 9, wherein a charging rate of the constant current is 10 C or less.

5. A method for inspecting an all-solid battery, the method comprising:

a grasping step of grasping a relationship between a battery capacity at which a voltage abnormality occurs in the all-solid battery and a resistance of the all-solid battery;

a resistance calculation step of calculating the resistance based on a current and voltage in charging the all-solid battery; and

a capacity calculation step of calculating the battery capacity at which the voltage abnormality occurs in the all-solid battery from the relationship grasped in the grasping step and the resistance calculated in the resistance calculation step.

6. The method for inspecting an all-solid battery according to claim 5, wherein the resistance is calculated in the resistance calculation step based on a current and voltage in charging the all-solid battery when a state of charge of the all-solid battery is 0% or more and 20% or less.

7. The method for inspecting an all-solid battery according to claim 5, wherein the resistance is calculated in the resistance calculation step based on a current and voltage in charging at a constant current.

8. The method for inspecting an all-solid battery according to claim 7, wherein a charging rate of the constant current is 10 C or less.

11. The method for inspecting an all-solid battery according to claim 6, wherein the resistance is calculated in the resistance calculation step based on a current and voltage in charging at a constant current.

12. The method for inspecting an all-solid battery according to claim 11, wherein a charging rate of the constant current is 10 C or less.