# US 12,119,773 B2 · Power supply system and method for controlling power supply system

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- Number: US 12,119,773 B2
- Document ID: US12119773B2
- Status: Granted
- Kind: B2
- Application number: 17/927,483
- Filed: 2020-05-28
- Published: 2023-07-06
- Granted: 2024-10-15
- Earliest claimed: 2020-05-28
- Assignees: Nissan Motor Co., Ltd.; Ampere S.A.S.
- Applicants: Nissan Motor Co., Ltd.; Ampere S.A.S.
- Inventors: Yukinori Tsukamoto
- Web page: https://patentgrep.com/patent/US12119773B2

## CPC

- B60L 1/00: Supplying electric power to auxiliary equipment of vehicles (circuit arrangements for charging batteries H02J7/00)
- H02P 5/74: controlling two or more AC dynamo-electric motors (H02P5/46, H02P5/60 take precedence)
- B60L 3/04: Cutting off the power supply under fault conditions (protective devices and circuit arrangements in general H01H; H02H)
- B60L 50/60: using power supplied by batteries (in combination with fuel cells B60L50/75)
- B60L 58/20: having different nominal voltages
- H02M 7/53871: {with automatic control of output voltage or current}
- B60L 2210/10: DC to DC converters
- Y02T 10/72: Electric energy management in electromobility
- 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
- H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- 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 power source system mounted in a vehicle includes: a first power source (2); a first load (41) operated by electric power supplied from the first power source (2); a first controller (9) that controls an operation of the first load (41) by a first program; a second power source (8) connected to the first power source (2) via a converter (7); a second load (11) operated by electric power supplied from the second power source (8); a second controller (10) that controls an operation of the second load (11) by a second program; an electric power disconnecting device (3) that connects or disconnects between the first power source (2) and the first load (41); and a third controller (12) that controls the electric power disconnecting device (3). When the first program is changed, the third controller (12) disconnects the first power source (2) from the first load (41) by the electric power disconnecting device (3) before a change process of the first program is started.

## Claims

### Claim 1

A power source system mounted in a vehicle, the power source system comprising:
a first power source;
a first load configured to be operated by electric power supplied from the first power source;
a first controller configured to control an operation of the first load using a first program;
a second power source connected to the first power source via a converter;
a second load configured to be operated by electric power supplied from the second power source;
a second controller configured to control an operation of the second load using a second program;
an electric power disconnecting device configured to connect and disconnect the first power source and the first load;
a third controller that controls configured to control the electric power disconnecting device;
a capacitor configured to smooth an output voltage of the first power source; and
a discharge circuit configured to discharge an electric charge accumulated in the capacitor, wherein:
the third controller is configured to, upon receiving a request to change the first program, before the first program is changed:
disconnect the first power source from the first load using the electric power disconnecting device, and
after the first power source is disconnected from the first load, discharge the electric charge accumulated in the capacitor using the discharge circuit.

### Claim 2 (depends on 1)

The power source system according to claim 1, wherein:
the third controller is configured to, upon receiving a request to change the second program, before the second program is changed, connect the first power source and the first load using the electric power disconnecting device.

### Claim 3 (depends on 2)

The power source system according to claim 2, wherein:
the third controller is configured to, after the second program is changed, disconnect the first power source from the first load and the converter using the electric power disconnecting device.

### Claim 4

A power source system mounted in a vehicle, the power source system comprising:
a first power source;
a plurality of first loads configured to be operated by electric power supplied from the first power source;
a first controller comprising a plurality of first controllers configured to control respective operations of the plurality of first loads by a respective plurality of first programs;
a second power source connected to the first power source via a converter;
a second load configured to be operated by electric power supplied from the second power source;
a second controller configured to control an operation of the second load using a second program;
an electric power disconnecting device configured to connect and disconnect the first power source and the plurality of first loads; and
a third controller configured to control the electric power disconnecting device;
wherein:
the electric power disconnecting device is configured to connect and disconnect the first power source and the converter,
the plurality of first loads and the converter are connected to the first power source in parallel via the electric power disconnecting device, and
the third controller is configured to, upon receiving a request to sequentially change the plurality of first programs:
before a first of the plurality of first programs is changed, disconnect the first power source from the plurality of first loads using the electric power disconnecting device;
after the first of the plurality of first programs is changed, connect the first power source and the converter using the electric power disconnecting device, and
before a second of the plurality of first programs is changed, disconnect the first power source from the converter using the electric power disconnecting device.

### Claim 5

A power source system control method for controlling a power source system mounted in a vehicle, wherein:
the power source system includes:
a first power source;
a first load configured to be operated by electric power supplied from the first power source;
a first controller configured to control an operation of the first load using a first program;
a second power source connected to the first power source via a converter;
a second load configured to be operated by electric power supplied from the second power source;
a second controller configured to control an operation of the second load using a second program;
an electric power disconnecting device configured to connect and disconnect the first power source and the first load;
a third controller that controls configured to control the electric power disconnecting device;
a capacitor configured to smooth an output voltage of the first power source; and
a discharge circuit configured to discharge an electric charge accumulated in the capacitor; and
upon receiving a request to change the first program, before the first program is changed, the method comprises;
disconnecting the first power source from the first load using the electric power disconnecting device; and
after the first power source is disconnected from the first load, discharging the electric charge accumulated in the capacitor using the discharge circuit.