# US 2013/0154356 A1 · Motor-driven refrigerating apparatus for vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154356 A1 - Document ID: US20130154356A1 - Status: Published application - Kind: A1 - Application number: 13/716,594 - Filed: 2012-12-17 - Published: 2013-06-20 - Earliest claimed: 2011-12-19 - Assignees: Denso Corporation - Inventors: Kenji Nakajima - Web page: https://patentgrep.com/patent/US20130154356A1 ## CPC - B60R 16/033: characterised by the use of electrical cells or batteries (for propulsion puposes B60K1/04; supplying batteries to, or removing batteries from, vehicles B60S5/06; testing of charge state G01R31/36) - B60H 1/00371: {for vehicles carrying large numbers of passengers, e.g. buses} - B60H 1/00428: {electric} - B60H 1/3222: {characterised by the compressor driving arrangements, e.g. clutches, transmissions or multiple drives (B60H1/3208, B60H1/3226 take precedence)} - B60H 2001/3292: {Compressor drive is electric only} - Y02T 10/88: Optimized components or subsystems, e.g. lighting, actively controlled glasses - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A vehicle has a low-voltage power generator driven by an engine, a standard low-voltage battery and a standard low-voltage electric load. Additional equipment has an additional low-voltage battery for supplying electric power to an additional low-voltage electric load. The additional low-voltage battery is charged with electric power from the low-voltage power generator. The additional equipment further has a high-voltage battery for supplying electric power to a high-voltage electric load, and a converter for converting low-voltage electric power from the low-voltage power generator to high-voltage electric power. When relays are opened during a period in which engine operation is stopped, the electric power is supplied from the additional low-voltage battery to the converter, so that the high-voltage electric power is supplied to the high-voltage electric load, such as a motor-driven compressor. ## Claims ### Claim 1 In a refrigerating apparatus for a vehicle having an engine for driving the vehicle, wherein the refrigerating apparatus is operated not only in a period in which the engine is operated but also in a period in which engine operation is stopped, the refrigerating apparatus comprises: a low-voltage electric load operated with low-voltage electric power; a motor-driven compressor operated with high-voltage electric power, voltage of which is higher than that of the low-voltage electric power; a low-voltage battery for supplying the low-voltage electric power to the low-voltage electric load; a high-voltage battery for supplying the high-voltage electric power to the motor-driven compressor; a low-voltage power charging unit for charging the low-voltage battery with the electric power generated during the period in which the engine is operated; and a high-voltage power charging unit for charging the high-voltage battery with the electric power generated during the period in which the engine is operated. ### Claim 2 (depends on 1) The refrigerating apparatus according to claim 1, wherein the low-voltage battery is composed of a lead battery, and the high-voltage battery is composed of a lithium ion battery or a nickel metal-hydride battery. ### Claim 3 (depends on 1) The refrigerating apparatus according to claim 1, wherein the low-voltage electric load includes; an electric fan; and a control unit. ### Claim 4 (depends on 1) The refrigerating apparatus according to claim 1, wherein the low-voltage battery is composed of; a standard low-voltage battery, which is normally provided in the vehicle; and an additional low-voltage battery, which is additionally provided in the vehicle. ### Claim 5 (depends on 4) The refrigerating apparatus according to claim 4, wherein the low-voltage power charging unit has a switch, which is provided between the standard low-voltage battery and the additional low-voltage battery, wherein the switch is closed during the period in which the engine is operated, in order to connect the standard low-voltage battery and the additional low-voltage battery to each other, and wherein the switch is opened during the period in which the engine operation is stopped, in order to disconnect the standard low-voltage battery and the additional low-voltage battery from each other. ### Claim 6 (depends on 1) The refrigerating apparatus according to claim 1, wherein the low-voltage power charging unit includes; a low-voltage power generator driven by the engine; and a circuit device for supplying electric power generated by the low-voltage power generator to the low-voltage battery, and wherein the high-voltage power charging unit includes; a converter for converting the low-voltage electric power generated by the low-voltage power generator to the high-voltage electric power. ### Claim 7 (depends on 6) The refrigerating apparatus according to claim 6, wherein the high-voltage power charging unit includes a switch, the switch is closed during the period in which the engine is operated, in order to connect the low-voltage battery and the converter with each other, and the switch is opened during the period in which the engine operation is stopped, in order to disconnect the low-voltage battery and the converter from each other. ### Claim 8 (depends on 1) The refrigerating apparatus according to claim 1, wherein the low-voltage power charging unit includes a low-voltage power generator, which is driven by the engine and supplies electric power generated to the low-voltage battery; and wherein the high-voltage power charging unit includes a high-voltage power generator, which is driven by the engine and supplies electric power generated to the high-voltage battery. ### Claim 9 A vehicle system for a vehicle, which has an engine for driving the vehicle and additional equipment including an air-conditioning apparatus, wherein the air-conditioning apparatus is operated not only in a period in which the engine is operated but also in a period in which engine operation is stopped, and wherein the vehicle system comprises: a standard low-voltage electric load operated with low-voltage electric power; a standard low-voltage battery for supplying its low-voltage electric power to the standard low-voltage electric load; and a low-voltage power generator driven by the engine and supplying its generated low-voltage electric power to the standard low-voltage battery, wherein the air-conditioning apparatus comprises; an additional low-voltage electric load operated with low-voltage electric power; a motor-driven compressor operated with high-voltage electric power, voltage of which is higher than that of the low-voltage electric power; an additional low-voltage battery for supplying its low-voltage electric power to the additional low-voltage electric load; a high-voltage battery for supplying its high-voltage electric power to the motor-driven compressor; a converter for converting low-voltage electric power to high-voltage electric power, wherein an input side of the converter is operatively connected to the standard low-voltage battery and/or the additional low-voltage battery, while an output side of the converter is connected to the high-voltage battery and the motor-driven compressor, so that the electric power from the standard low-voltage battery and/or the additional low-voltage battery is converted to the high-voltage electric power to be supplied to the high-voltage battery and the motor-driven compressor; a first switching device provided between the standard low-voltage battery and the additional low-voltage battery; and a second switching device provided between the standard low-voltage battery and the converter, wherein the first and second switching devices are closed during the period in which the engine is operated, so that the electric power is supplied from the standard low-voltage battery and/or the additional low-voltage battery to the converter and converted by the converter to the high-voltage electric power, and wherein the first and second switching devices are opened during the period in which the engine operation is stopped, so that the motor-driven compressor is operated with the electric power from the high-voltage battery. ### Claim 10 A vehicle system for a vehicle, which has an engine for driving the vehicle and additional equipment including an air-conditioning apparatus, wherein the air-conditioning apparatus is operated not only in a period in which the engine is operated but also in a period in which engine operation is stopped, and wherein the vehicle system comprises: a standard low-voltage electric load operated with low-voltage electric power; a standard low-voltage battery for supplying its low-voltage electric power to the standard low-voltage electric load; and a low-voltage power generator driven by the engine and supplying its generated low-voltage electric power to the standard low-voltage battery, wherein the air-conditioning apparatus comprises; an additional low-voltage electric load connected to the standard low-voltage battery and operated with low-voltage electric power; a motor-driven compressor operated with high-voltage electric power, voltage of which is higher than that of the low-voltage electric power; a high-voltage battery for supplying its high-voltage electric power to the motor-driven compressor; a converter for converting low-voltage electric power to high-voltage electric power, wherein an input side of the converter is operatively connected to the standard low-voltage battery and/or the low-voltage power generator, while an output side of the converter is connected to the high-voltage battery and the motor-driven compressor, so that the electric power from the standard low-voltage battery is converted to the high-voltage electric power to be supplied to the high-voltage battery and the motor-driven compressor; a switching device provided between the standard low-voltage battery and the converter, wherein the switching device is closed during the period in which the engine is operated, so that the low-voltage electric power from the standard low-voltage battery and/or the low-voltage power generator is supplied to the converter and converted by the converter to the high-voltage electric power, and wherein the switching device is opened during the period in which the engine operation is stopped, so that the motor-driven compressor is operated with the electric power only from the high-voltage battery. ### Claim 11 A vehicle system for a vehicle, which has an engine for driving the vehicle and additional equipment including an air-conditioning apparatus, wherein the air-conditioning apparatus is operated not only in a period in which the engine is operated but also in a period in which engine operation is stopped, and wherein the vehicle system comprises: a standard low-voltage electric load operated with low-voltage electric power; a standard low-voltage battery for supplying its low-voltage electric power to the standard low-voltage electric load; and a low-voltage power generator driven by the engine and supplying its generated low-voltage electric power to the standard low-voltage battery, wherein the air-conditioning apparatus comprises; a high-voltage power generator driven by the engine for generating high-voltage electric power; an additional low-voltage electric load connected to the standard low-voltage battery and operated with low-voltage electric power; a motor-driven compressor operated with high-voltage electric power, voltage of which is higher than that of the low-voltage electric power; a high-voltage battery for supplying its high-voltage electric power to the motor-driven compressor; a switching device provided between the high-voltage power generator and the motor-driven compressor; wherein the switching device is closed during the period in which the engine is operated, so that the high-voltage electric power generated at the high-voltage power generator is supplied to the motor-driven compressor, and wherein the switching device is opened during the period in which the engine operation is stopped, so that the motor-driven compressor is operated with the electric power only from the high-voltage battery. ### Claim 12 A vehicle system for a vehicle, which has an engine for driving the vehicle and additional equipment including an air-conditioning apparatus, wherein the air-conditioning apparatus is operated not only in a period in which the engine is operated but also in a period in which engine operation is stopped, and wherein the vehicle system comprises: a standard low-voltage electric load operated with low-voltage electric power; a standard low-voltage battery for supplying its low-voltage electric power to the standard low-voltage electric load; and a low-voltage power generator driven by the engine and supplying its generated low-voltage electric power to the standard low-voltage battery, wherein the air-conditioning apparatus comprises; an additional low-voltage electric load operated with low-voltage electric power; an additional low-voltage battery for supplying its low-voltage electric power to the additional low-voltage electric load; a first switching device provided between the low-voltage power generator as well as the standard low-voltage battery and the additional low-voltage battery; a high-voltage power generator driven by the engine for generating high-voltage electric power; a motor-driven compressor operated with high-voltage electric power, voltage of which is higher than that of the low-voltage electric power; a high-voltage battery for supplying its high-voltage electric power to the motor-driven compressor; a second switching device provided between the high-voltage power generator and the motor-driven compressor; wherein the second switching device is closed during the period in which the engine is operated, so that the high-voltage electric power generated at the high-voltage power generator is supplied to the motor-driven compressor, and wherein the second switching device is opened during the period in which the engine operation is stopped, so that the motor-driven compressor is operated with the electric power only from the high-voltage battery.