Patent ID: 9290904
Filing Date: 2016-03-22
CPC Classification: B60L,E02F,H01M,H02J,Y02E,Y02T

Claim Text:
1. A shovel, comprising: a lower-part movable body; an upper-part turnable body turnably mounted on the lower-part movable body; a boom including a first end rotatably attached onto the upper-part turnable body; an arm including a first end rotatably attached to a second end of the boom; a work element rotatably attached to a second end of the arm; an electrical energy storage device including a plurality of electrical energy storage cells, and mounted on the upper-part turnable body; a controller configured to control a charge and a discharge of the electrical energy storage device; and a plurality of voltage measurement parts configured to measure respective cell voltages of the plurality of electrical energy storage cells, wherein information on the cell voltages is transmitted to the controller, and wherein the controller is configured to determine whether to equalize the cell voltages of the plurality of electrical energy storage cells based on the cell voltages measured under a same condition during a key-on state.