Analytical device, analysis method, manufacturing method, electric storage device, electric storage system, electronic device, electric vehicle and electric power system
An analytical device is provided. The analytical device includes a battery condition analysis section configured to detect a state change of a constituent member of a battery based on a change in peak of a relaxation time in a predetermined frequency band.
1. A battery analytical device, comprising:
a battery condition analysis section including an alternating current generator, a voltage measuring section and a calculating section,
wherein the alternating current generator is configured to generate an alternating current with a constant amplitude and provide the alternating current to a battery, and
wherein the battery condition analysis section including the alternating current generator is configured to detect a state change of a constituent member of the battery based on a change in peak of a relaxation time distribution in a predetermined frequency band,
wherein the battery condition analysis section determines deterioration of a positive electrode of the battery in a case that the change in peak of the relaxation time distribution at 1 to 10 Hz is equal to or more than a first predetermined value, and
wherein the battery condition analysis section determines deterioration of a negative electrode of the battery in a case that the change in peak of the relaxation time distribution at 10 to 100 Hz is equal to or more than a second predetermined value.
2. The battery analytical device according to claim 1 , wherein the battery condition analysis section is configured to identify the constituent member of the battery.
3. The battery analytical device according to claim 1 , wherein the battery condition analysis section is configured to determine the relaxation time distribution of a frequency band with an arc shape on a Nyquist diagram obtained from a measurement result of an AC impedance of the battery.
4. The battery analytical device according to claim 1 , wherein the battery includes a lithium ion secondary battery.
5. The battery analytical device according to claim 1 , wherein the state change of the constituent member indicates deterioration of the constituent member.
6. An electric storage device comprising:
a battery; and
the battery analytical device according to claim 1 ,
wherein the battery is connected to the battery analytical device.
7. An electric storage system comprising:
the electric storage device according to claim 6 ; and
a processor that controls the electric storage device.
8. An electric vehicle comprising:
the electric storage device according to claim 6 ; and
a conversion device including a motor configured to receive supply of electric power from the electric storage device and convert the electric power into a driving force of a vehicle.
9. The electric vehicle according to claim 8 further comprising an information processing device.
10. An electric power system comprising the electric storage device according to claim 6 , wherein the electric storage device is a power supply.