# US 11,309,595 B2 · Rechargeable battery cell and method for producing and operating a rechargeable battery cell > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,595 B2 - Document ID: US11309595B2 - Status: Granted - Kind: B2 - Application number: 16/012,981 - Filed: 2018-06-20 - Published: 2018-10-18 - Granted: 2022-04-19 - Earliest claimed: 2015-12-21 - Assignees: Bayerische Motoren Werke Aktiengesellschaft - Applicants: Bayerische Motoren Werke Aktiengesellschaft - Inventors: Jan Philipp Schmidt - Web page: https://patentgrep.com/patent/US11309595B2 ## CPC - H01M 10/4257: {Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries} - H01M 10/052: Li-accumulators - 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 - 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 10/484: {for measuring electrolyte level, electrolyte density or electrolyte conductivity} - H01M 10/486: {for measuring temperature} - H01M 2010/4278: {Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller} - 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 A rechargeable battery cell includes a cathode, an anode, an electrolyte, and a sensor that is arranged in the rechargeable battery cell. The sensor has at least two sensor electrodes and is accommodated in the rechargeable battery cell without a sheathing at least in sections. Moreover, the at least two sensor electrodes are operated in an electrical potential range that protects the sensor and/or the sensor electrodes against corrosion by the electrolyte. A method for producing and operating a rechargeable battery cell of this kind is also provided. ## Claims ### Claim 1 An accumulator cell comprising: a cathode arranged at a first end of the accumulator cell; an anode arranged at a second end of the accumulator cell that is opposite to the first end; an electrolyte arranged inside of the accumulator cell; and a sensor having at least two sensor electrodes, wherein the sensor is arranged in a central portion of the accumulator cell and is completely surrounded by and in direct contact with the electrolyte except for end portions of the at least two sensor electrodes which project outside of the electrolyte, wherein the at least two sensor electrodes are operated in an electrical potential range that protects the sensor and/or the sensor electrodes from corrosion by the electrolyte, wherein the accumulator cell, in which the sensor is arranged, is a lithium ion accumulator, and wherein a housing of the sensor is completely surrounded by and directly in contact with the electrolyte. ### Claim 2 (depends on 1) The accumulator cell according to claim 1, wherein a first sensor electrode is connected in the accumulator cell such that it is operated at an electric potential of the cathode, and/or a second sensor electrode is connected in the accumulator cell such that it is operated at an electric potential of the anode. ### Claim 3 (depends on 1) The accumulator cell according to claim 1, wherein a first sensor electrode is coupled to the cathode and operated at an electric potential of the cathode, and/or a second sensor electrode is coupled to the anode and operated at an electric potential of the anode. ### Claim 4 (depends on 1) The accumulator cell according to claim 1, further comprising a controller, wherein the controller is coupled to the sensor and configured to drive the sensor. ### Claim 5 (depends on 1) The accumulator cell according to claim 1, wherein the at least two sensor electrodes are not protected within the electrolyte by a passive corrosion protection. ### Claim 6 (depends on 1) The accumulator cell according to claim 1, wherein the at least two sensor electrodes are wired in the accumulator cell such that they are operated in a potential range from greater than 0 V to 3 V with respect to the electrolyte. ### Claim 7 (depends on 1) The accumulator cell according to claim 1, wherein the sensor is a temperature sensor, resistance sensor, gas pressure sensor, or a strain gauge. ### Claim 8 A method for the manufacture and operation of an accumulator cell, the method comprising the acts of: arranging a sensor in an interior of the accumulator cell so that the sensor is directly exposed to electrolyte in the accumulator cell; connecting sensor electrodes of the sensor to an anode and/or a cathode of the accumulator cell; and operating the sensor electrodes in an electric potential range that protects against corrosion caused by the electrolyte; wherein the accumulator cell, in which the sensor is arranged, is a lithium ion accumulator; and wherein a housing of the sensor is completely surrounded by and directly in contact with the electrolyte. ### Claim 9 (depends on 8) The method according to claim 8, wherein the sensor electrodes are operated in a potential range from greater than 0 V to 3 V with respect to the electrolyte. ### Claim 10 (depends on 1) The accumulator cell according to claim 1, wherein the sensor is housed in the accumulator cell at least partially without cladding. ### Claim 11 (depends on 4) The accumulator cell according to claim 4, wherein the controller is read wirelessly and/or through provided terminals. ### Claim 12 (depends on 6) The accumulator cell according to claim 6, wherein the potential range is 0.1 V to 2 V. ### Claim 13 (depends on 9) The method according to claim 9, wherein the electric potential range is from 0.1 V to 2 V.