Short Circuit Sign Detection System and Short Circuit Sign Detection Method
AssigneesNissan Motor Co., Ltd., RENAULT s.a.s.
InventorTetsuya Aoki
Life of this patent
Estimating the term…
Abstract
A short circuit precursor detection system includes a battery cell, a temperature sensor that measures a battery temperature, a resistance measurement unit that measures electrolyte resistance of a solid-state electrolyte of the battery cell, and a determination unit that determines presence or absence of a precursor of occurrence of short circuit between a positive electrode and a negative electrode. The determination unit determines that the precursor is present when an amount of decrease of the electrolyte resistance measured by the resistance measurement unit during charging is larger than an amount of decrease of the electrolyte resistance caused by change in the battery temperature by a predetermined value or more.
Claims7
A short circuit precursor detection system comprising:
- a battery including a positive electrode, a negative electrode containing lithium, and a solid-state electrolyte;
- and
- a controller including a processor, wherein the controller:
- measures a battery temperature as a temperature of the battery;
- measures an electrolyte resistance of the solid-state electrolyte;
- determines presence or absence of a precursor of short circuit that occurs between the positive electrode and the negative electrode;
- and
- determines that the precursor is present when an amount of decrease of the electrolyte resistance measured during charging is larger than an amount of decrease of the electrolyte resistance caused by a change in the battery temperature by a predetermined value or more.
A short circuit precursor detection method for determining presence or absence of a precursor of occurrence of short circuit between a positive electrode and a negative electrode of a battery including the positive electrode, the negative electrode containing lithium, and a solid-state electrolyte, comprising:
- measuring a battery temperature as a temperature of the battery;
- measuring an electrolyte resistance of the solid-state electrolyte;
- and
- determining that the precursor is present when an amount of decrease of the electrolyte resistance during charging is larger than an amount of decrease of the electrolyte resistance caused by a temperature change of the battery by a predetermined value or more.
Dependencies are inferred from the claim text.