SOH evaluation method for electrochemical device, electronic equipment and battery system

The embodiment of the invention provides a SOH (state of health) evaluation method for an electrochemical device, electronic equipment and a battery system. The method comprises the steps that intermittent charging operation is conducted on the electrochemical device, the reference internal resistance and the lithium precipitation SOC of the electrochemical device are obtained in the intermittent charging operation, and the reference internal resistance is used for indicating the internal resistance when the electrochemical device is charged to the first SOC; and the SOH of the electrochemical device is determined based on the lithium precipitation SOC, the reference internal resistance and a pre-established lithium precipitation SOC-reference internal resistance-SOH mapping relation. Based on the scheme, the internal resistance and the lithium precipitation state of the electrochemical device are considered, and the SOH is evaluated from the two dimensions of the internal resistance and the lithium precipita