# US 2017/0288593 A1 · Power supply system

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2017/0288593 A1
- Document ID: US20170288593A1
- Status: Published application
- Kind: A1
- Application number: 15/470,022
- Filed: 2017-03-27
- Published: 2017-10-05
- Earliest claimed: 2016-03-31
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Kota Suzuki; Tomoko Oba
- Web page: https://patentgrep.com/patent/US20170288593A1

## CPC

- H02P 27/08: with pulse width modulation
- B60L 3/003: {relating to inverters}
- B60L 3/04: Cutting off the power supply under fault conditions (protective devices and circuit arrangements in general H01H; H02H)
- B60L 53/22: Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
- H02M 1/08: Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M 1/32: Means for protecting converters other than automatic disconnection
- H02M 3/158: including plural semiconductor devices as final control devices for a single load
- H02M 7/539: with automatic control of output wave form or frequency (H02M7/5375 - H02M7/5387 take precedence)
- B60L 2240/36: Temperature of vehicle components or parts
- B60L 2240/525: Temperature of converter or components thereof
- H02M 1/327: {against abnormal temperatures}
- H02P 25/03: with brushless excitation
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- Y02T 10/92: Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
- Y02T 90/12: Electric charging stations
- Y02T 90/14: Plug-in electric vehicles
- H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- 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
- 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 converter includes one chip constituted a switching device and a diode. An electronic control unit is configured to calculate a temperature estimated value of the switching device from control conditions of the converter, restrict a control upper-limit value of charge power or discharge power of a battery, when a detection value of a temperature sensor is higher than the temperature estimated value of the switching device, and the detection value of the temperature sensor exceeds a protection temperature of the diode, and restrict a control upper-limit value of charge power or discharge power of the battery, when the detection value of the temperature sensor is lower than the temperature estimated value of the switching device, and the detection value of the temperature sensor exceeds a protection temperature of the switching device.

## Claims

### Claim 1

A power supply system configured to supply electric power to a load, the power supply system comprising:
a battery;
a first positive line connected to a positive electrode of the battery;
a second positive line connected to a positive terminal of the load;
a negative line connected between a negative terminal of the load and a negative electrode of the battery;
a converter configured to perform voltage conversion between the battery and the load, the converter including
a first switching device and a second switching device connected in series between the second positive line and the negative line, such that the first switching device is located closer to the second positive line than the second switching device, and the second switching device is located closer to the negative line than the first switching device,
a first diode connected in antiparallel with the first switching device, the first switching device and the first diode constituting one chip,
a second diode connected in antiparallel with the second switching device,
a connection node connected to the first switching device, the second switching device, and the first positive line, and
a reactor provided on the first positive line or on the negative line between the second switching device and the negative electrode of the battery;
a temperature sensor configured to detect a temperature of the chip; and
an electronic control unit configured to
i) calculate a temperature estimated value of the first switching device from control conditions of the converter,
ii) restrict a control upper-limit value of discharge power of the battery, when a detection value of the temperature sensor is higher than the temperature estimated value of the first switching device, and the detection value of the temperature sensor exceeds a protection temperature of the first diode, and
iii) restrict a control upper-limit value of charge power of the battery, when the detection value of the temperature sensor is lower than the temperature estimated value of the first switching device, and the detection value of the temperature sensor exceeds a protection temperature of the first switching device.

### Claim 2 (depends on 1)

The power supply system according to claim 1, wherein the power supply system being installed on a vehicle,
the vehicle includes:
a motor;
a radiator;
a water pump;
a water channel that circularly connects an interior of the converter, the radiator, and the water pump in series; and
a water temperature sensor configured to detect a temperature of a cooling water that flows through the water channel; and
the electronic control unit is configured to
i) calculate an estimated temperature difference between a temperature of the first switching device and the temperature of the cooling water detected by the water temperature sensor, based on at least one of information indicating whether the motor is in power running mode or the motor is in regenerative mode, amount of current passing through the converter, a boosting ratio of the converter, and a switching frequency, and
ii) calculate the temperature estimated value of the first switching device, by adding the estimated temperature difference to the temperature of the cooling water detected by the water temperature sensor.

### Claim 3

A power supply system configured to supply electric power to a load, the power supply system comprising:
a battery;
a first positive line connected to a positive electrode of the battery;
a second positive line connected to a positive terminal of the load;
a negative line connected between a negative terminal of the load and a negative electrode of the battery;
a converter configured to perform voltage conversion between the battery and the load, the converter including
a first switching device and a second switching device connected in series between the second positive line and the negative line, such that the first switching device is located closer to the second positive line than the second switching device, and the second switching device is located closer to the negative line than the first switching device,
a first diode connected in antiparallel with the first switching device, the first switching device and the first diode constituting one chip,
a second diode connected in antiparallel with the second switching device, the second switching device and the second diode constituting one chip,
a connection node connected to the first switching device, the second switching device, and the first positive line,
a reactor provided on the first positive line or on the negative line between the second switching device and the negative electrode of the battery;
a temperature sensor configured to detect a temperature of the chip; and
an electronic control unit configured to
i) calculate a temperature estimated value of the second switching device from control conditions of the converter,
ii) restrict a control upper-limit value of charge power of the battery, when a detection value of the temperature sensor is higher than the temperature estimated value of the second switching device, and the detection value of the temperature sensor exceeds a protection temperature of the second diode, and
iii) restrict a control upper-limit value of discharge power of the battery, when the detection value of the temperature sensor is lower than the temperature estimated value of the second switching device, and the detection value of the temperature sensor exceeds a protection temperature of the second switching device.

### Claim 4 (depends on 3)

The power supply system according to claim 3, wherein the power supply system being installed on a vehicle,
the vehicle includes:
a motor;
a radiator;
a water pump;
a water channel that circularly connects an interior of the converter, the radiator, and the water pump in series; and
a water temperature sensor configured to detect a temperature of a cooling water that flows through the water channel, and the electronic control unit is configured to
i) calculate an estimated temperature difference between a temperature of the second switching device and the temperature of the cooling water detected by the water temperature sensor, based on at least one of information indicating whether the motor is in power running mode or the motor is in regenerative mode, amount of current passing through the converter, a boosting ratio of the converter, and a switching frequency, and
ii) calculate the temperature estimated value of the second switching device, by adding the estimated temperature difference to the temperature of the cooling water detected by the water temperature sensor.

### Claim 5

A power supply system configured to supply electric power to a load, the power supply system comprising:
a battery;
a converter configured to perform voltage conversion between the battery and the load, the converter including
a switching device,
a diode connected in antiparallel with the switching device, the switching device and the diode constituting one chip;
a temperature sensor configured to detect a temperature of the chip; and
an electronic control unit configured to
i) calculate a temperature estimated value of the switching device from control conditions of the converter,
ii) restrict a control upper-limit value of charge power or discharge power of the battery, when a detection value of the temperature sensor is higher than the temperature estimated value of the switching device, and the detection value of the temperature sensor exceeds a protection temperature of the diode, and
iii) restrict a control upper-limit value of charge power or discharge power of the battery, when the detection value of the temperature sensor is lower than the temperature estimated value of the switching device, and the detection value of the temperature sensor exceeds a protection temperature of the switching device.

### Claim 6 (depends on 5)

The power supply system according to claim 5, wherein the power supply system being installed on a vehicle,
the vehicle includes:
a motor;
a radiator;
a water pump;
a water channel that circularly connects an interior of the converter, the radiator, and the water pump in series; and
a water temperature sensor configured to detect a temperature of a cooling water that flows through the water channel, and
the electronic control unit is configured to
i) calculate an estimated temperature difference between a temperature of the switching device and the temperature of the cooling water detected by the water temperature sensor, based on at least one of information indicating whether the motor is in power running mode or the motor is in regenerative mode, amount of current passing through the converter, a boosting ratio of the converter, and a switching frequency, and
ii) calculate the temperature estimated value of the switching device, by adding the estimated temperature difference to the temperature of the cooling water detected by the water temperature sensor.