# US 2014/0197777 A1 · Electricity supply system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197777 A1 - Document ID: US20140197777A1 - Status: Published application - Kind: A1 - Application number: 14/166,551 - Filed: 2014-01-28 - Published: 2014-07-17 - Earliest claimed: 2011-07-29 - Assignees: BYD Company Limited; Shenzhen BYD Auto R&D Company Limited - Applicants: BYD Company Limited; Shenzhen BYD Auto R&D Company Limited - Inventors: Zhiwei TONG; Jianhua ZHU; Zhipei LU; Qing LAI - Web page: https://patentgrep.com/patent/US20140197777A1 ## CPC - H01M 10/637: characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching (means for preventing undesired use or discharge H01M50/572) - B60L 58/22: Balancing the charge of battery modules - B60L 58/27: by heating - H01M 10/4207: {for several batteries or cells simultaneously or sequentially} - H01M 10/615: Heating or keeping warm - H01M 10/625: Vehicles - H02J 7/342: {The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging (with circuits for polarity protection H02J7/68)} - H02J 7/52: for charge balancing, e.g. equalisation of charge between batteries - H02J 7/56: Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters - B60L 2240/545: Temperature - B60L 2240/547: Voltage - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - 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 - 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 - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An electricity supply system comprises: a battery module, a control module, and a distribution box. The battery module includes at least two in-series modules, each comprising at least two battery groups connected in series. The control module is connected with the battery module and includes an IGBT module, a relay module, and a relay control module. The relay module includes a plurality of relays K. Each in-series module is connected to the relay module. The relay module is connected to the IGBT module. The relay control module is configured for controlling ON or OFF of each relay K so as to select an in-series module to work with the IGBT module. The distribution box is connected with the control module. ## Claims ### Claim 1 An electricity supply system, comprising: a battery module, comprising at least two in-series modules, each in-series module comprising at least two battery groups connected in series; a control module connected with the battery module, comprising: an insulated gate bipolar transistor (IGBT) module, a relay module comprising a plurality of relays, wherein each in-series module is connected to the relay module, and the relay module is connected to the IGBT module, a relay control module configured for controlling ON or OFF of each relay so as to select one or more in-series module to work with the IGBT module; and a distribution box connected with the control module. ### Claim 2 (depends on 1) The electricity supply system according to claim 1, wherein the battery group comprises: a first battery group connected with the distribution box via a first relay, which is connected with the first battery group in series; a plurality of middle battery groups, each middle battery group connected with the distribution box via a second relay, which is connected with the middle battery group in series, and connected with the IGBT module via a third relay, which is connected with the middle battery group in series; and a last battery group connected with the IGBT module via a fourth relay, which is connected with the last battery group in series. ### Claim 3 (depends on 1) The electricity supply system according to claim 1, wherein each in-series module comprises two battery groups connected in series. ### Claim 4 (depends on 1) The electricity supply system according to claim 1, wherein the relay includes an electromagnetic relay. ### Claim 5 (depends on 1) The electricity supply system according to claim 1, wherein the relay control module includes a single-chip microcomputer. ### Claim 6 (depends on 1) The electricity supply system according to claim 1, wherein the IGBT module is connected with the distribution box. ### Claim 7 (depends on 1) The electricity supply system according to claim 1, wherein two adjacent in-series modules are connected via a relay. ### Claim 8 A method for heating a battery group, comprising: configuring a battery module to comprise at least two in-series modules, wherein each of the at least two in-series modules comprises at least two battery groups connected in series; configuring a control module comprising an insulated gate bipolar transistor (IGBT) module, a relay module and a relay control module, wherein the relay module is configured to comprise a plurality of relays, each in-series module is connected to the relay module, and the relay module is connected to the IGBT module, the relay control module is configured to control ON or OFF of each relay so as to select one or more in-series module to work with the IGBT module; and configuring a distribution box to connect with the IGBT module and the relay module. ### Claim 9 (depends on 8) The method for heating a battery group according to claim 8, wherein the in-series module comprises: a first battery group connected with the distribution box via a first relay, which is connected with the first battery group in series; a plurality of middle battery groups, each middle battery group connected with the distribution box via a second relay, which is connected with the middle battery group in series, and connected with the IGBT module via a third relay, which is connected with the middle battery group in series; and a last battery group connected with the IGBT module via a fourth relay, which is connected with the last battery group in series. ### Claim 10 (depends on 8) The method for heating a battery group according to claim 8, wherein the at least two in-series modules includes an in-series module having a maximum voltage and an in-series module having a minimum voltage connected in parallel. ### Claim 11 (depends on 8) The method for heating a battery group according to claim 8, wherein each in-series module is configured to comprise a first battery group and a second battery group connected in series. ### Claim 12 (depends on 8) The method for heating a battery group according to claim 8 further comprising: configuring a relay control module to control ON or OFF of each relay so as to connect a first battery group in a first in-series module to the distribution box directly and to connect a second battery group in the first in-series module to the distribution box via the IGBT module. ### Claim 13 (depends on 8) The method for heating a battery group according to claim 8, comprising: configuring a relay control module to control ON or OFF of each relay so as to connect a first battery group in a first in-series module to the distribution box directly, and to connect a second battery group in a second in-series module to the distribution box via the IGBT module, wherein the first battery group in the first in-series module, a second battery group in the first in-series module, a first battery group in the second in-series module and the second battery group in the second in-series module are connected in series. ### Claim 14 (depends on 8) The method for heating a battery group according to claim 8, wherein the relay includes an electromagnetic relay. ### Claim 15 (depends on 8) The method for heating a battery group according to claim 8, wherein the relay control module includes a single-chip microcomputer. ### Claim 16 (depends on 8) The method for heating a battery group according to claim 8, wherein the IGBT module is connected with the distribution box. ### Claim 17 (depends on 8) The method for heating a battery group according to claim 8, wherein two adjacent in-series modules are connected via a relay.