# US 2015/0147604 A1 · Method for reducing the dendritic metal deposition on an electrode and lithium-ion rechargeable battery which uses this method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0147604 A1 - Document ID: US20150147604A1 - Status: Published application - Kind: A1 - Application number: 14/553,635 - Filed: 2014-11-25 - Published: 2015-05-28 - Earliest claimed: 2013-11-27 - Assignees: Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Niluefer BABA - Web page: https://patentgrep.com/patent/US20150147604A1 ## CPC - H01M 10/4257: {Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) - H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing} - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - 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 ## Abstract In a method for reducing the dendritic metal deposition on an electrode, a non-dendritic state of the metal deposition is ascertained, and a magnetic or electric field is generated at the electrode and is modulated in such a way that it stabilizes the non-dendritic state of the metal deposition. The method is applied, e.g., to a lithium-ion rechargeable battery including an anode having an anode arrester, a cathode having a cathode arrester, and a separator, which are situated in a housing, in which a dendritic metal deposition at the anode is reduced with the aid of the method. ## Claims ### Claim 1 A method for reducing the dendritic metal deposition on an electrode, comprising: ascertaining a non-dendritic state of the metal deposition at the electrode; generating one of a magnetic or electric field at the electrode; and modulating the one of the magnetic or electric field to stabilize the non-dendritic state of the metal deposition. ### Claim 2 (depends on 1) The method as recited in claim 1, wherein the non-dendritic state of the metal deposition is ascertained by an analysis method of the non-linear pattern formation. ### Claim 3 (depends on 2) The method as recited in claim 2, wherein the analysis method of the non-linear pattern formation includes: transitioning a metal deposition on the electrode into a chaotic state; ascertaining unstable states of the metal deposition having a regular dynamic with the aid of an attractor reconstruction from an experimental time series of the system considered; and selecting a state from the unstable states as one of the non-dendritic state or a dendritically reduced state. ### Claim 4 A lithium-ion rechargeable battery, comprising: an anode having an anode arrester; a cathode having a cathode arrester; a separator; and a housing containing the anode, the cathode and the separator; wherein a dendritic metal deposition at the anode is reduced by: ascertaining a non-dendritic state of the metal deposition at the electrode; generating one of a magnetic or electric field at the electrode; and modulating the one of the magnetic or electric field to stabilize the non-dendritic state of the metal deposition. ### Claim 5 (depends on 4) The lithium-ion rechargeable battery as recited in claim 4, wherein the housing is situated in a solenoid configured to be passed through by a time-variable electric current to generate a magnetic field, and wherein the magnetic field is modulated to stabilize the non-dendritic state of the metal deposition at the anode. ### Claim 6 (depends on 5) The lithium-ion rechargeable battery as recited in claim 5, wherein the solenoid is supplied with electrical energy by the lithium-ion rechargeable battery. ### Claim 7 (depends on 4) The lithium-ion rechargeable battery as recited in claim 4, wherein the housing is coated with a material which is permanently magnetized to generate a magnetic field, and wherein the magnetic field is modulated to stabilize the non-dendritic state of the metal deposition at the anode. ### Claim 8 (depends on 4) The lithium-ion rechargeable battery as recited in claim 4, wherein a permanently magnetized material is situated in the housing to generate a magnetic field, and wherein the magnetic field is modulated to stabilize the non-dendritic state of the metal deposition at the anode. ### Claim 9 (depends on 8) The lithium-ion rechargeable battery as recited in claim 8, wherein the permanently magnetized material includes one of (i) a magnetizable material introduced into the separator in the form of particles, or (ii) a coating made of the magnetizable material on a side of the separator facing the anode. ### Claim 10 (depends on 8) The lithium-ion rechargeable battery as recited in claim 8, wherein the permanently magnetized material includes one of (i) a coating applied on the side of the anode facing the separator, or (ii) a coating applied between the anode and the anode arrester. ### Claim 11 A method for manufacturing a lithium-ion rechargeable battery, comprising: ascertaining a non-dendritic state of a metal deposition at an anode; and generating one of a magnetic field or electric field by a field generating element situated one of on or in the lithium-ion rechargeable battery; and modulating the one of the magnetic field or the electric field to stabilize the non-dendritic state of the metal deposition at the anode. ### Claim 12 (depends on 11) The method for manufacturing a lithium-ion rechargeable battery as recited in claim 11, wherein the field generating element is a magnetizable material which is permanently magnetized and situated one of on or in the lithium-ion rechargeable battery.