Lithium-ion battery and method for regenerating the same

A lithium-ion battery, comprising:

• electrode bodies and an electrolyte accommodated in a battery container;
• and
• a means of adding a coating film forming agent for adding a coating film forming agent that forms a coating film on the surface of each electrode body to the electrolyte in the battery container, the means of adding a coating film forming agent comprising a housing means for housing the coating film forming agent isolated from the electrolyte in the battery container and a releasing means for releasing the coating film forming agent from the housing means into the electrolyte, the releasing means
• comprising an actuator for applying external force to the housing means, thereby allowing the coating film forming agent to be released from the housing means and a controlling means for determining whether or not conditions predetermined based on the lithium-ion battery status are satisfied, controlling the actuator if it is determined that the conditions are satisfied, and thereby releasing the coating film forming agent from the housing means.