# US 12,113,384 B2 · Dual battery power management system and its battery controller and method for controlling the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,384 B2 - Document ID: US12113384B2 - Status: Granted - Kind: B2 - Application number: 17/719,411 - Filed: 2022-04-13 - Published: 2023-06-29 - Granted: 2024-10-08 - Earliest claimed: 2021-12-29 - Assignees: Inventec Appliances (Pudong) Corporation; Inventec Appliances Corp.; Inventec Appliances (Shanghai) Co. Ltd. - Applicants: Inventec Appliances (Pudong) Corporation; Inventec Appliances Corporation; Inventec Appliances (Shanghai) Co. Ltd. - Inventors: Ming-Tsan Lin - Web page: https://patentgrep.com/patent/US12113384B2 ## CPC - H02J 7/575: {Parallel/serial switching of connection of batteries to charge or load circuit} - H02J 7/855: {with circuits adapted for supplying loads from the battery} - H02J 7/933: {the cycle being controlled or terminated in response to electric parameters} - H02M 3/158: including plural semiconductor devices as final control devices for a single load - H02M 3/1582: {Buck-boost converters (H02M3/1584 takes precedence)} - H02J 2207/20: Charging or discharging characterised by the power electronics converter - H02M 1/0032: {Control circuits allowing low power mode operation, e.g. in standby mode} - H02M 1/36: Means for starting or stopping converters - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A dual battery power management system, its battery controller and method for controlling the same have been provided. The dual battery power management system includes a load module, a battery controller, a first battery and a second battery. The battery controller is electrically connected to the load module for receiving an electrical requirement demanded by the load module. The battery controller is provided with a DC-DC converter and a serial-parallel switch. The first battery is employed to provide a first input voltage which is converted to a converted DC voltage by the DC-DC converter. The second battery is electrically connected to the serial-parallel switch and is used to provide a second input voltage. Upon the aforementioned electrical requirement, the battery controller controls the series-parallel switch to be operated at a serial mode or a parallel mode. ## Claims ### Claim 1 A dual battery power management system, comprising: a load module; a battery controller, electrically connected to the load module, for receiving an electrical requirement from the load module, wherein the battery controller has a DC-DC converter and a series-parallel switch connected to the DC-DC converter; a first battery, electrically connected to the DC-DC converter, for providing a first input voltage which is converted into a converted DC voltage by the DC-DC converter and the converted DC voltage is applied to the series-parallel switch; and a second battery, electrically connected to the series-parallel switch, for providing a second input voltage applied to the series-parallel switch; wherein the battery controller controls the series-parallel switch to be operated at either a series mode or a parallel mode in response to the electrical requirement; wherein the series-parallel switch controls the converted DC voltage and the second input voltage to be a series output voltage applied to the load module under the series mode; wherein the series-parallel switch controls the converted DC voltage and the second input voltage to be a parallel output voltage applied to the load module under the parallel mode; wherein the battery controller comprises a processor for receiving the electrical requirement and controlling the DC-DC converter and the series-parallel switch in response to the electrical requirement; switching the parallel mode to the series mode in response to a first threshold by the processor; and switching the series mode to the parallel mode in response to a second threshold by means of the processor. ### Claim 2 (depends on 1) The dual battery power management system according to claim 1, wherein the load module comprises a motor and motor driver. ### Claim 3 (depends on 1) The dual battery power management system according to claim 1, further comprising a charger utilized to charge the first battery. ### Claim 4 A battery controller, electrically connected to a first battery and a second battery, to be operated at either a series mode or a parallel mode in response to an electrical requirement provided by a load module, comprising: a DC-DC converter for receiving a first input voltage provided by the first battery and converting the first input voltage into a converted DC voltage; and a series-parallel switch for receiving the converted DC voltage and a second input voltage provided by the second battery; wherein the series-parallel switch controls the converted DC voltage and the second input voltage to be a series output voltage applied to the load module under the series mode; wherein the series-parallel switch controls the converted DC voltage and the second input voltage to be a parallel output voltage applied to the load module under the parallel mode; wherein the battery controller comprises a processor for receiving the electrical requirement and controlling the DC-DC converter and the series-parallel switch in response to the electrical requirement; switching the parallel mode to the series mode in response to a first threshold by the processor; and switching the series mode to the parallel mode in response to a second threshold by means of the processor. ### Claim 5 A method for controlling a battery controller which is electrically connected to a first battery and second batter and operated at either a series mode or a parallel mode in response to an electrical requirement provided by a load module; the method comprising: providing a DC-DC converter for receiving a first input voltage provided by the first battery and converting the first voltage into a converted DC voltage; and providing a series-parallel switch for receiving the converted DC voltage and a second input voltage provided by the second battery; wherein the series-parallel switch controls the converted DC voltage and the second input voltage to be a series output voltage applied to the load module under the series mode; wherein the series-parallel switch controls the converted DC voltage and the second input voltage to be a parallel output voltage applied to the load module under the parallel mode; providing a processor for receiving the electrical requirement and controlling the DC-DC converter and the series-parallel switch in response to the electrical requirement; switching the parallel mode to the series mode in response to a first threshold by the processor; and switching the series mode to the parallel mode in response to a second threshold by means of the processor. ### Claim 6 (depends on 1) The method according to claim 1, further comprising: adjusting a duty cycle of the converted DC voltage by means of pulse-width modulation (PWM) while switching the parallel mode to the series mode. ### Claim 7 (depends on 6) The method according to claim 6, wherein the first threshold is the second input voltage and the second threshold is 90% of the second input voltage. ### Claim 8 (depends on 1) The method according to claim 1, further comprising: providing a charger utilized to charge the first battery.