Charge voltage controller for energy storage device, energy storage apparatus, battery charger for energy storage device, and charging method for energy storage device

A charge voltage controller for a chargeable and dischargeable energy storage device including an electrode assembly having a positive electrode and a negative electrode,

• wherein the charge voltage controller is configured to control upper limit voltage applied to charge the energy storage device in accordance with at least one of charge time of the energy storage device, current inputted to the energy storage device, temperature of the energy storage device, and a state of charge of the energy storage device, to inhibit potential of the negative electrode from being lower than deposition potential at which metal ions transmitting and receiving an electric charge between the positive electrode and the negative electrode are deposited at the negative electrode, and
• wherein the charge voltage controller is configured to control the upper limit voltage further in accordance with a temporary power decrease of the energy storage device, the temporary power decrease being recoverable power decrease, and
• wherein the charge voltage controller is configured to decrease the upper limit voltage when the temporary power decrease is large.