# US 8,541,118 B2 · Lithium-ion battery and method for regenerating the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,541,118 B2 - Document ID: US8541118B2 - Status: Granted - Kind: B2 - Application number: 13/004,148 - Filed: 2011-01-11 - Published: 2011-07-14 - Granted: 2013-09-24 - Earliest claimed: 2010-01-13 - Assignees: Hitachi, Ltd. - Applicants: Takefumi Okumura; Ryo Inoue; Toshio Abe - Inventors: Takefumi Okumura; Ryo Inoue; Toshio Abe - Web page: https://patentgrep.com/patent/US8541118B2 ## CPC - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/058: Construction or manufacture - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02W 30/84: Recycling of batteries or fuel cells - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT ## Abstract This invention provides a lithium-ion battery in which a coating film forming agent degradation reaction is prevented. A lithium-ion battery 100 in which electrodes 1 and 2 and an electrolyte are accommodated in a battery container 13 , and which has a means of for adding a coating film forming agent 20 for adding a coating film forming agent 21 that forms a coating film on the surface of each of electrodes 1 and 2 to an electrolyte in a battery container 13 is provided. With the use of such means of adding a coating film forming agent 20, a reaction of electrochemical degradation of a coating film forming agent 21 is prevented, allowing long-term preservation. Also, with the addition of a coating film forming agent 21 to an electrolyte, a deteriorated coating film on the surface of each of electrodes 1 and 2 is repaired such that a lithium-ion battery 100 can be regenerated, resulting in extension of battery life. ## Claims ### Claim 1 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. ### Claim 2 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 having a configuration whereby external force is manually applied to the housing means from the exterior of the battery container so as to allow the coating film forming agent to be released from the housing means. ### Claim 3 (depends on 1) The lithium-ion battery according to claim 1, wherein the means of adding a coating film forming agent has an inlet through which the coating film forming agent can be introduced into the battery container. ### Claim 4 (depends on 1) A method for regenerating the lithium-ion battery according to claim 1, comprising controlling the actuator to allow the coating film forming agent to be released from the housing means, thereby adding the coating film forming agent to the electrolyte in the battery container. ### Claim 5 (depends on 2) The lithium-ion battery according to claim 2, wherein the means of adding a coating film forming agent has an inlet through which the coating film forming agent can be introduced into the battery container. ### Claim 6 (depends on 2) A method for regenerating the lithium-ion battery according to claim 2, comprising applying an external force to the housing means from the exterior of the battery container so as to allow the coating film forming agent to be released from the housing means, thereby adding the coating film forming agent to the electrolyte in the battery container.