# US 12,759,404 B2 · Battery management system communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,759,404 B2 - Document ID: US12759404B2 - Status: Granted - Kind: B2 - Application number: 18/192,359 - Filed: 2023-03-29 - Published: 2024-10-03 - Granted: 2026-10-13 - Earliest claimed: 2023-03-29 - Assignees: Toyota Motor North America, Inc.; Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Motor North America, Inc. - Inventors: Norman Lu; Maximilian Parness - Web page: https://patentgrep.com/patent/US12759404B2 ## CPC - B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors} - B60L 3/04: Cutting off the power supply under fault conditions (protective devices and circuit arrangements in general H01H; H02H) - G01R 31/3842: combining voltage and current measurements - H01M 10/441: {for several batteries or cells simultaneously or sequentially} - H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing} - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY ## Abstract An example operation includes one or more of providing, by a battery, electricity to a device, determining a configuration of the provided electricity based on a first battery management system (BMS) that contains voltage and current requirements, and configuring a second BMS, based on the determining. ## Claims ### Claim 1 A method, comprising: detachably coupling an auxiliary battery to a device that includes an internal battery through an external port of the device; determining a state of charge (SOC) of the internal battery with a battery management system (BMS) of the internal battery, wherein the SOC is determined based on information received via a communication from a BMS of the auxiliary battery which includes a SOC of the auxiliary battery; determining whether to supply power to a power consuming component of the device from the auxiliary battery or the internal battery of the device based on a comparison of the SOC of the internal battery to a SOC threshold that controls selection of the auxiliary battery or the internal battery; and configuring a switch within the device to control the power consuming component of the device to receive power directly from the auxiliary battery based on the determination. ### Claim 2 (depends on 1) The method of claim 1, wherein the configuring is responsive to the auxiliary battery being attached to a port of the device. ### Claim 3 (depends on 2) The method of claim 2, comprising: providing electricity, from the auxiliary battery, to the power consuming component of the device based on the configured switch. ### Claim 4 (depends on 1) The method of claim 1, further comprising directing electricity from the internal battery to components of the device that consume a lower amount of electricity compared to other components of the device. ### Claim 5 (depends on 1) The method of claim 1, wherein the configuring comprises: disabling non-essential components of the device when the SOC of the internal battery and another SOC of the auxiliary battery are below a threshold. ### Claim 6 (depends on 1) The method of claim 1, wherein the switch comprises a first switch associated with the auxiliary battery and a second switch associated with the internal battery, and the configuring comprises configuring the first and second switches. ### Claim 7 (depends on 1) The method of claim 1, comprising: receiving a code associated with the auxiliary battery; and authenticating, by the device, the auxiliary battery based on the received code. ### Claim 8 A system, comprising: at least one processor; and a memory, wherein the at least one processor and the memory are communicably coupled, wherein the at least one processor is configured to: detachably couple an auxiliary battery to a device that includes an internal battery through an external port of the device; determine a state of charge (SOC) of the internal battery with a battery management system (BMS) of the internal battery, wherein the SOC is determined based on information received via a communication from a BMS of the auxiliary battery which includes a SOC of the auxiliary battery; determine whether to supply power to a power consuming component of the device from the auxiliary battery or the internal battery of the device based on a comparison of the SOC of the internal battery to a SOC threshold that controls selection of the auxiliary battery or the internal battery; and configure a switch within the device to control the power consuming component of the device to receive power directly from the auxiliary battery based on the determination. ### Claim 9 (depends on 8) The system of claim 8, wherein the at least one processor is configured to configure the switch responsive to the auxiliary battery being attached to a port of the device. ### Claim 10 (depends on 9) The system of claim 9, wherein the at least one processor is further configured to: provide electricity, from the auxiliary battery, to the power consuming component of the device based on the configured switch. ### Claim 11 (depends on 8) The system of claim 8, wherein the at least one processor is configured to direct electricity to components of the device which consume a lower amount of electricity compared to other components of the device. ### Claim 12 (depends on 8) The system of claim 8, wherein the at least one processor is configured to: disable non-essential components of the device when the SOC of the internal battery and another SOC of the auxiliary battery are below a threshold. ### Claim 13 (depends on 8) The system of claim 8, wherein the switch comprises a first switch associated with the auxiliary battery and a second switch associated with the internal battery, and the at least one processor configures the first and second switches. ### Claim 14 (depends on 8) The system of claim 8, wherein the at least one processor is further configured to: receive a code associated with the auxiliary battery; and authenticate, by the device, the auxiliary battery based on the received code. ### Claim 15 A computer-readable storage medium comprising instructions, that when read by a processor, cause the processor to perform: detachably coupling an auxiliary battery to a device that includes an internal battery through an external port of the device; determining a state of charge (SOC) of the internal battery based on a battery management system (BMS) of the internal battery, wherein the SOC is determined based on information received via a communication from a BMS of the auxiliary battery which includes a SOC of the auxiliary battery; determining whether to supply power to a power consuming component of the device from the auxiliary battery or the internal battery of the device based on a comparison of the SOC of the internal battery to a SOC threshold that controls selection of the auxiliary battery or the internal battery; and configuring a switch within the device to control the power consuming component of the device to receive power directly from the auxiliary battery based on the determination. ### Claim 16 (depends on 15) The computer-readable storage medium of claim 15, wherein the configuring is responsive to the auxiliary battery being attached to a port of the device. ### Claim 17 (depends on 16) The computer-readable storage medium of claim 16, comprising: providing electricity, from the auxiliary battery, to the power consuming component of the device based on the configured switch. ### Claim 18 (depends on 15) The computer-readable storage medium of claim 15, wherein the processor is further configured to perform directing electricity to components of the device which consume a lower amount of electricity compared to other components of the device. ### Claim 19 (depends on 15) The computer-readable storage medium of claim 15, wherein the switch comprises a first switch associated with the auxiliary battery and a second switch associated with the internal battery, and the configuring comprises configuring the first and second switches. ### Claim 20 (depends on 1) The method of claim 1, further comprising transmitting the communication between the BMS of the auxiliary battery and the BMS of the internal battery via the external port.