CHARGING DEVICE AND CHARGING METHOD

• US 20140042968A1
• Filed: 04/22/2011
• Published: 02/13/2014
• Est. Priority Date: 04/22/2011
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Hiroe, Yoshihiko
• Granted Patent: US 9,126,488 B2
• Time in Patent Office: Days
• US Class Current: 320/109
• CPC Class Codes: B60L 2260/56 Temperature prediction, e.g. for pre-cooling
• CPC Class Codes: B60L 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: B60L 53/665 Methods related to measuring, billing or payment
• CPC Class Codes: B60L 58/24 for controlling the temperature of batteries
• CPC Class Codes: H01M 10/443 in response to temperature
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H02J 7/007194 of the battery
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/167 Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/14 Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A charging device for charging a battery (10) by an external power supply (2) includes a temperature sensor (46) for detecting the temperature of the battery, a charger (4) receiving electric power from the external power supply to charge the battery, and a control device (50) controlling the charger such that the battery is charged at a charging rate determined based on the temperature difference between a charging/discharging limitation start temperature and the battery temperature. Preferably, the control device (50) determines the charging rate based on the difference between the amount of charge corresponding to full charge of the battery (10) and the current remaining amount of charge, and the temperature difference. Preferably, the vehicle (100) on which the battery (10) is mounted repeatedly carries out charging and vehicle-running. The control device (50) determines the charging rate according to the temperature increase expected amount when the vehicle runs next time.

Claims

1. A charging device for charging a battery mounted on a vehicle by an external power supply,

said vehicle configured to increase limitation on electric power charged to and discharged from said battery according to increase in temperature of said battery when said battery temperature exceeds a predetermined temperature,

said charging device comprising:

a temperature sensor for detecting the temperature of said battery,

a charger receiving electric power from said external power supply to charge said battery, and

a control device controlling said charger such that said battery is charged at a charging rate determined based on a temperature difference between said predetermined temperature and said battery temperature,

said vehicle on which said battery is mounted being capable of repeatedly executing a charging operation towards said battery from outside the vehicle and a vehicle-running operation,

said control device determining said charging rate based on a temperature increase expected amount when said vehicle runs next time and said temperature difference.

2. The charging device according to claim 1, wherein said control device determines said charging rate based on a difference between an amount of charge corresponding to full charge of said battery and a current remaining amount of charge, and said temperature difference.

3. (canceled)

4. A charging method for charging a battery mounted on a vehicle by an external power supply,

said vehicle configured to increase limitation on electric power charged to and discharged from said battery according to increase in temperature of said battery when said battery temperature exceeds a predetermined temperature,

said charging method comprising the steps of:

detecting a temperature of said battery,

calculating a temperature difference between said predetermined temperature and said battery temperature, and

charging said battery such that charging of said battery is executed at a charging rate determined based on said temperature difference,

said vehicle on which said battery is mounted being capable of repeatedly executing a charging operation towards said battery from outside the vehicle and a vehicle-running operation,

said step of charging determining said charging rate based on a temperature increase expected amount when said vehicle runs next time and said temperature difference.

5. The charging method according to claim 4, wherein said step of charging determines said charging rate based on a difference between an amount of charge corresponding to full charge of said battery and a current remaining amount of charge, and said temperature difference.

6. (canceled)