PERFORMANCE DETERIORATION DETECTING APPARATUS AND PERFORMANCE DETERIORATION DETECTING METHOD FOR ENERGY STORAGE DEVICE, AND ENERGY STORAGE SYSTEM

• US 20170102436A1
• Filed: 12/20/2016
• Published: 04/13/2017
• Est. Priority Date: 11/30/2012
• Status: Active Grant

• Current Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation)
• Original Assignee: GS Yuasa International Ltd. (GS Yuasa Corporation)
• Inventors: Tao, Yohei, Yamate, Shigeki
• Granted Patent: US 9,864,017 B2
• Time in Patent Office: Days
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 58/16 responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
• CPC Class Codes: B60Y 2200/91 Electric vehicles
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: B60Y 2400/112 Batteries
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: G01R 31/385 Arrangements for measuring battery or accumulator variables for monitoring G01R31/382
• 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
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 4/505 of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
• CPC Class Codes: H01M 4/525 of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/005 Detection of state of health [SOH]
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries

Abstract

A performance deterioration detecting apparatus configured to detect a performance deterioration start state of an energy storage device. The performance deterioration start state is an initial state of deterioration in performance of the energy storage device. The apparatus includes a performance deterioration determiner configured to determine that the energy storage device is in the performance deterioration start state based on a displacement of peak position in a capacity-voltage property of the energy storage device with time. The capacity-voltage property indicates a relation between a capacity variation amount (dQ/dV) and a voltage (V).

Claims

1. A performance deterioration detecting apparatus configured to detect a performance deterioration start state of an energy storage device, wherein the performance deterioration start state is an initial state of deterioration in performance of the energy storage device, the apparatus comprising:

a performance deterioration determiner configured to determine that the energy storage device is in the performance deterioration start state based on a displacement of peak position in a capacity-voltage property of the energy storage device with time,

wherein the capacity-voltage property indicates a relation between a capacity variation amount (dQ/dV) and a voltage (V).

2. The performance deterioration detecting apparatus according to claim 1, wherein the performance deterioration determiner determines that the energy storage device is in an initial state of sudden deterioration in chargeable or dischargeable capacity of the energy storage device.

3. The performance deterioration detecting apparatus according to claim 1, wherein the performance deterioration determiner determines that the energy storage device is in an initial state of sudden deterioration in input-output performance indicated by an input-output property of the energy storage device.

4. An energy storage system comprising:

an energy storage device; and

the performance deterioration detecting apparatus according to claim 1.

5. The energy storage system according to claim 4, wherein the performance deterioration determiner determines that the energy storage device is in an initial state of sudden deterioration in chargeable or dischargeable capacity of the energy storage device.

6. The energy storage system according to claim 4, wherein the performance deterioration determiner determines that the energy storage device is in an initial state of sudden deterioration in input-output performance indicated by an input-output property of the energy storage device.

7. The energy storage system according to claim 4, wherein a maximum current flowing the energy storage device is limited if the performance deterioration determiner determines that the energy storage device is in the performance deterioration start state.

8. The energy storage system according to claim 4, further comprising:

a vehicle on which the energy storage device is mounted.

9. The energy storage system according to claim 8, wherein the performance deterioration determiner determines that the energy storage device is in an initial state of sudden deterioration in input-output performance indicated by an input-output property of the energy storage device.

10. The energy storage system according to claim 4, wherein the energy storage device comprises a lithium-ion secondary battery.

11. A performance deterioration detecting method of detecting a performance deterioration start state of an energy storage device, wherein the performance deterioration start state is an initial state of deterioration in performance of the energy storage device, the method comprising:

determining, by a performance deterioration determiner, that the energy storage device is in the performance deterioration start state based on a displacement of peak position in a capacity-voltage property of the energy storage device with time,

wherein the capacity-voltage property indicates a relation between a capacity variation amount (dQ/dV) and a voltage (V).