# US 12,113,181 B2 · Battery cell with an integrated control circuit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,181 B2 - Document ID: US12113181B2 - Status: Granted - Kind: B2 - Application number: 17/270,360 - Filed: 2019-10-15 - Published: 2021-10-21 - Granted: 2024-10-08 - Earliest claimed: 2018-10-15 - Assignees: Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Walter Von Emden; Joachim Joos; Johannes Grabowski - Web page: https://patentgrep.com/patent/US12113181B2 ## CPC - H01M 10/4257: {Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries} - H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00) - H01M 10/443: {in response to temperature} - 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 10/486: {for measuring temperature} - H02J 7/54: Passive balancing, e.g. using resistors or parallel MOSFETs - G01R 31/3842: combining voltage and current measurements - G01R 31/396: Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery - H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing} - H01M 2200/00: Safety devices for primary or secondary batteries - Y02E 60/10: Energy storage using batteries - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A battery cell. The battery cell incluedes a first terminal contact and a second terminal contact, an energy storage unit, a first transistor, a sensor system that is set up to acquire a state parameter of the battery cell, and a control circuit. A first pole of the energy storage unit is coupled to the first terminal contact, and a second pole of the energy storage unit is coupled to the second terminal contact. The first transistor is connected between the first terminal contact and the second terminal contact in series with the energy storage unit. The he control circuit is set up to control a switching process of the first transistor, the control circuit controlling the first transistor based on the acquired state parameter in order to control a charge current or a discharge current of the energy storage unit. ## Claims ### Claim 1 A battery cell, comprising: a first terminal contact; a second terminal contact; an energy storage unit; a first transistor; a sensor system configured to acquire a state parameter of the battery cell; and a control circuit; and a second transistor connected between the first terminal contact and the second terminal contact, parallel to the energy storage unit; wherein the control circuit is configured to control a switching process of the second transistor, wherein the second transistor is a thin-film MOSFET transistor, wherein the control circuit is configured to switch both the first transistor and the second transistor into a conductive state simultaneously, and wherein: a first pole of the energy storage unit is coupled to the first terminal contact, and a second pole of the energy storage unit is coupled to the second terminal contact, the first transistor is connected between the first terminal contact and the second terminal contact in series with the energy storage unit, and the control circuit is configured to control a switching process of the first transistor based on the acquired state parameter to control a charge current or a discharge current of the energy storage unit, wherein the first transistor and the second transistor are situated on an external surface of the energy storage unit. ### Claim 2 (depends on 1) The battery cell according to claim 1, wherein the sensor system includes a voltage sensor and/or a current sensor and/or a temperature sensor. ### Claim 3 (depends on 1) The battery cell as recited in claim 1, wherein the first transistor is a thin-film MOSFET transistor. ### Claim 4 (depends on 1) The battery cell as recited in claim 1, wherein the control circuit is configured to control the switching process of the first transistor for controlling the charge current or the discharge current through a pulsed switching of the first transistor or through an operation of the first transistor in a resistance operating mode. ### Claim 5 (depends on 1) The battery cell as recited in claim 1, wherein the control circuit is configured to control the switching process of the first transistor for controlling the charge current or the discharge current in such a way that a cell balancing is carried out. ### Claim 6 (depends on 1) The battery cell as recited in claim 1, wherein the control circuit is configured to ascertain a charge state of the energy storage unit, and/or a state of aging of the energy storage unit, and/or a functional state of the energy storage unit. ### Claim 7 A battery cell, comprising: a first terminal contact; a second terminal contact; an energy storage unit; a first transistor; a sensor system configured to acquire a state parameter of the battery cell; and a control circuit; wherein: a first pole of the energy storage unit is coupled to the first terminal contact, and a second pole of the energy storage unit is coupled to the second terminal contact, the first transistor is connected between the first terminal contact and the second terminal contact in series with the energy storage unit, and the control circuit is configured to control a switching process of the first transistor based on the acquired state parameter to control a charge current or a discharge current of the energy storage unit, wherein the first transistor is situated on an external surface of the energy storage unit, a first contact surface of the first transistor lies on the second pole of the energy storage unit, a plate-shaped conductor lies on a second contact surface of the first transistor that is oriented away from the external surface of the energy storage unit, and the plate-shaped conductor is electrically connected to the second terminal contact. ### Claim 8 (depends on 7) The battery cell as recited in claim 7, further comprising: a further transistor situated on the external surface of the energy storage unit, a first contact surface of the further transistor lying on the first pole of the energy storage unit, the plate-shaped conductor further lying on a second contact surface of the further transistor that is oriented away from the external surface of the energy storage unit.