# US 2019/0356136 A1 · Electric battery recharge method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0356136 A1 - Document ID: US20190356136A1 - Status: Published application - Kind: A1 - Application number: 16/410,446 - Filed: 2019-05-13 - Published: 2019-11-21 - Earliest claimed: 2018-05-16 - Assignees: STMicroelectronics (Tours) SAS - Applicants: STMicroelectronics (Tours) SAS - Inventors: Emmanuel Bailly - Web page: https://patentgrep.com/patent/US20190356136A1 ## CPC - H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00) - G01R 19/16528: {using digital techniques or performing arithmetic operations (using digital techniques to measure a voltage or a current, see G01R19/25)} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/0562: Solid materials - H02J 7/90: Regulation of charging or discharging current or voltage - H01M 6/40: Printed batteries {, e.g. thin film batteries} - H01M 10/0436: {Small-sized flat cells or batteries for portable equipment} - H01M 10/052: Li-accumulators - H02J 7/94: in response to battery current - 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 - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC 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 method and system of recharging an electric battery, include an alternation of phases of recharge at a constant current and of phases of recharge at constant voltage. ## Claims ### Claim 1 A method of recharging an electric battery, comprising alternating phases of recharge at a constant current and phases of recharge at constant voltage. ### Claim 2 (depends on 1) The method of claim 1, wherein the phases of recharge at constant current and the phases of recharge at constant voltage have predetermined durations. ### Claim 3 (depends on 2) The method of claim 2, wherein the predetermined duration of each phase of recharge at constant current is set before the beginning of said phase according to a value of a current measured in the battery at the end of the previous phase of recharge at constant voltage. ### Claim 4 (depends on 3) The method of claim 3, wherein an intensity of the recharge current applied to the battery at each phase of recharge at constant current is set before the beginning of said phase according to the value of the current measured in the battery at the end of the previous phase of recharge at constant voltage. ### Claim 5 (depends on 4) The method of claim 4, wherein a quantity of charges injected into the battery at each phase of recharge at constant current is a decreasing function of the current measured in the battery at the end of the previous phase of recharge at constant voltage. ### Claim 6 (depends on 1) The method of claim 1, wherein the phases of recharge at constant voltage all have substantially the same duration. ### Claim 7 (depends on 3) The method of claim 3, wherein the phases of recharge are interrupted in response to the current measured in the battery at the end of a phase of recharge at constant voltage reaching a predetermined low threshold. ### Claim 8 (depends on 1) The method of claim 1, wherein each phase of recharge at constant current is separated from the next phase of recharge at constant voltage by a rest phase. ### Claim 9 A system, comprising: an electric battery; and a recharge circuit coupled to the electric battery and configured to alternately apply constant currents and constant voltages to the electric battery. ### Claim 10 (depends on 9) The system of claim 9, wherein the electric battery comprises a lithium-ion type solid electrolyte microbattery. ### Claim 11 (depends on 9) The system of claim 9, wherein the electric battery comprises a thin-film battery having a solid electrolyte, and the thin-film battery configured to withstand overvoltages across the thin-film battery responsive to the constant currents being applied to the thin-film battery. ### Claim 12 (depends on 9) The system of claim 9, wherein the recharge circuit comprises a microcontroller. ### Claim 13 (depends on 9) The system of claim 9, wherein the recharge circuit is configured to apply constant currents to the electric battery during constant current phases of operation and to apply constant voltages to the electric battery during constant voltage phases of operation, each of the constant current and constant voltage phases of operation having a predetermined duration. ### Claim 14 (depends on 13) The system of claim 13, wherein the recharge circuit is configured to measure a value of recharge current charging the electric battery at an end of each constant voltage phase of operation, and is configured to set a value of the constant current in the subsequent constant current phase of operation based on the measured value of recharge current. ### Claim 15 (depends on 14) The system of claim 14, wherein the recharge circuit is further configured to set a duration of the subsequent constant current phase of operation based on the measured value of recharge current. ### Claim 16 (depends on 15) The system of claim 15, wherein each constant voltage phase of operation has a same duration. ### Claim 17 (depends on 13) The system of claim 13, wherein each constant current phase of operation is separated from the subsequent constant voltage phase of operation by a rest phase, the recharge circuit configured to place the electric battery in an open-circuit condition during each rest phase. ### Claim 18 A battery charger configured to be coupled to a battery and configured to alternately operate in a constant current phase and a constant voltage phase, the battery charger configured to supply a constant current to the battery during each constant current phase and to supply a constant voltage across the battery during each constant voltage phase. ### Claim 19 (depends on 18) The battery charger of claim 18 further configured to measure a value of a charging current supplied to the battery during each constant voltage phase. ### Claim 20 (depends on 19) The battery charger of claim 19, wherein the battery charger is further configured to decrease a value of the constant current supplied during each constant current phase based the measured value of the charging current in the preceding constant voltage phase.