# US 10,766,378 B2 · Electrically powered vehicle and method for controlling electrically powered vehicle

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- Number: US 10,766,378 B2
- Document ID: US10766378B2
- Status: Granted
- Kind: B2
- Application number: 16/223,797
- Filed: 2018-12-18
- Published: 2019-06-27
- Granted: 2020-09-08
- Earliest claimed: 2017-12-21
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Hiroyuki Obata
- Web page: https://patentgrep.com/patent/US10766378B2

## CPC

- B60L 55/00: Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
- B60K 6/445: Differential gearing distribution type
- B60L 50/13: using AC generators and AC motors
- B60W 20/13: in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
- H01M 10/443: {in response to temperature}
- H01M 10/486: {for measuring temperature}
- B60K 6/26: characterised by the motors or the generators
- B60L 2210/40: DC to AC converters
- B60L 2240/14: Acceleration
- B60L 2240/545: Temperature
- B60L 2250/28: Accelerator pedal thresholds
- B60W 2510/246: Temperature
- B60Y 2200/91: Electric vehicles
- B60Y 2200/92: Hybrid vehicles
- H01M 2200/10: Temperature sensitive devices
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/00: Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T 10/62: Hybrid vehicles
- Y02T 10/72: Electric energy management in electromobility
- Y04S 10/126: the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
- 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
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS

## Abstract

An ECU is configured to perform output restriction control if first and second conditions are satisfied when a cell temperature is more than a threshold temperature determined based on a thermal destruction temperature of a sealing member. On the other hand, the ECU is configured not to perform the output restriction control if one of the first and second conditions is not satisfied even when the cell temperature is more than the threshold temperature. The first condition is satisfied when an acceleration time period is more than a predetermined time period. The second condition is satisfied when the temperature increase ratio of the cell is more than a restriction value.

## Claims

### Claim 1

An electrically powered vehicle comprising:
a motor configured to generate vehicle driving power;
a secondary battery configured to supply electric power to the motor;
a temperature sensor configured to detect a temperature of the secondary battery; and
a controller configured to control an output of the secondary battery, wherein
the controller is configured to perform output restriction control to restrict the output of the secondary battery if a first condition and a second condition are satisfied when the temperature of the secondary battery is more than a threshold temperature, the threshold temperature being determined based on a thermal destruction temperature of a sealing member configured to seal a space between a case of the secondary battery and an electrode terminal,
the controller is configured not to perform the output restriction control if at least one of the first condition and the second condition is not satisfied even when the temperature of the secondary battery is more than the threshold temperature,
the first condition is satisfied when an acceleration time period indicating a time period of continuous acceleration of the electrically powered vehicle is more than a predetermined time period, and
the second condition is satisfied when a temperature increase ratio of the secondary battery is more than a predetermined restriction value.

### Claim 2 (depends on 1)

The electrically powered vehicle according to claim 1, wherein
based on an upper limit temperature of the secondary battery, the threshold temperature is set to a temperature lower than the upper limit temperature, and
based on the thermal destruction temperature, the upper limit temperature is set to a temperature lower than the thermal destruction temperature.

### Claim 3 (depends on 2)

The electrically powered vehicle according to claim 2, wherein the predetermined time period and the restriction value are set in accordance with the upper limit temperature in order to avoid the temperature of the secondary battery from becoming more than the upper limit temperature.

### Claim 4 (depends on 2)

The electrically powered vehicle according to claim 2, wherein
based on an upper limit value of the temperature increase ratio, the restriction value is set to a value smaller than the upper limit value,
the threshold temperature is changeable to such an extent that the threshold temperature is not more than the upper limit temperature, and
the upper limit value is set to be smaller as the threshold temperature is higher.

### Claim 5

A method for controlling an electrically powered vehicle,
the electrically powered vehicle including
a motor configured to generate vehicle driving power,
a secondary battery configured to supply electric power to the motor, and
a temperature sensor configured to detect a temperature of the secondary battery,
the method comprising:
determining whether or not the temperature of the secondary battery is more than a threshold temperature, the threshold temperature being determined based on a thermal destruction temperature of a sealing member configured to seal a space between a case of the secondary battery and an electrode terminal;
determining whether or not an acceleration time period indicating a time period of continuous acceleration of the electrically powered vehicle is more than a predetermined time period;
determining whether or not a temperature increase ratio of the secondary battery is more than a predetermined restriction value; and
performing output restriction control to restrict an output of the secondary battery if the acceleration time period is more than the predetermined time period and the temperature increase ratio is more than the restriction value when the temperature of the secondary battery is more than the threshold temperature, wherein
even when the temperature of the secondary battery is more than the threshold temperature, the output restriction control is not performed if the acceleration time period is less than or equal to the predetermined time period or if the temperature increase ratio is less than or equal to the restriction value.