Patent ID: 9252603
Filing Date: 2016-02-02
CPC Classification: H02H,H02J

Claim Text:
1. A power storage apparatus comprising: a first capacitor and a second capacitor which are connected in series; and a controller configured to apply a balance voltage to adjust a charging voltage between the first capacitor and the second capacitor, the controller comprising: wherein the balance voltage is determined based on the charging voltage and is applied to a node between the first capacitor and the second capacitor, wherein the controller is configured to determine an open state or a short state of at least one of the first capacitor and the second capacitor based on the charging voltage, and to apply the balance voltage to the node between the first capacitor and the second capacitor, wherein the controller further comprises a voltage follower to receive the balance voltage from the balance voltage generator and to output the balance voltage to a node between the first capacitor and the second capacitor, and wherein the voltage follower comprises: an operational amplifier to output the balance voltage according to the charging voltage and a feedback voltage from a node between the first capacitor and the second capacitor; a resistor to restrict a current flowing into the node; and a switch connected between the resistor and the node to output the balance voltage according to an activation signal.