Patent ID: 11906594
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC G  B  H  Y | IPC B  G  H

Claim 3:
4. A method for detecting an anomaly of a secondary battery in an electric vehicle,
wherein a vehicle comprises a secondary battery, a learned neural network portion for estimating internal resistance of the secondary battery, a regenerative brake for performing regenerative charging on the secondary battery, and a charging circuit for the regenerative charging of the secondary battery,
wherein the method comprises:
performing regenerative charging of the secondary battery when a brake of the vehicle runs;
measuring data of the secondary battery while the electric vehicle is stopped with regenerative charging not running;
inputting the data of the secondary battery to the learned neural network portion;
outputting estimated internal resistance of the secondary battery from the learned neural network portion; and
comparing a value of the estimated internal resistance with a reference value stored in advance as a range of a normal internal resistance in a memory.