Title:
ENERGY STORAGE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/047499
Kind Code:
A1
Abstract:
The present invention provides a novel energy storage system. The energy storage system includes a secondary battery, a current measurement circuit, a voltage measurement circuit, and a control circuit, wherein the secondary battery has a negative electrode, the negative electrode contains graphite and silicon, the current measurement circuit and the voltage measurement circuit are each electrically connected to the control circuit, the control circuit has a function that starts charging of the secondary battery, the control circuit has a function that uses a current value detected by the current measurement circuit and a voltage value detected by the voltage measurement circuit to perform a first operation for calculating the voltage derivative of the quantity of electricity in the charging current of the secondary battery and a second operation for detecting an extreme value of the voltage derivative, and the control circuit has a function that stops charging when a predetermined time has elapsed since the detection of the extreme value in the second operation.
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Inventors:
NAKAO TAISUKE (JP)
MIKAMI MAYUMI (JP)
TAJIMA RYOTA (JP)
OSADA TAKESHI (JP)
MIKAMI MAYUMI (JP)
TAJIMA RYOTA (JP)
OSADA TAKESHI (JP)
Application Number:
PCT/IB2023/058465
Publication Date:
March 07, 2024
Filing Date:
August 28, 2023
Export Citation:
Assignee:
SEMICONDUCTOR ENERGY LAB (JP)
International Classes:
H02J7/10; H01M10/48
Domestic Patent References:
| WO2011036760A1 | 2011-03-31 | |||
| WO2022015116A1 | 2022-01-20 |
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