Method for Preheating a Battery of an Electrically Operated Motor Vehicle, and Charging Device

• US 20200130535A1
• Filed: 12/26/2019
• Published: 04/30/2020
• Est. Priority Date: 06/27/2017
• Status: Active Grant

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: ROBERT, Francois-Xavier
• Granted Patent: US 11,325,501 B2
• Time in Patent Office: Days
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2250/14 by input of vehicle departure time
• CPC Class Codes: B60L 50/66 Arrangements of batteries
• CPC Class Codes: B60L 53/00 Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
• CPC Class Codes: B60L 53/50 Charging stations characterised by energy-storage or power-generation means
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: B60L 58/24 for controlling the temperature of batteries
• CPC Class Codes: B60L 58/27 by heating
• CPC Class Codes: H01M 10/443 in response to temperature
• CPC Class Codes: H01M 10/486 for measuring temperature
• CPC Class Codes: H01M 10/615 Heating or keeping warm
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/63 Control systems charging or discharging in response to temperature H01M10/44 , H01M10/443; measurement of temperature H01M10/48 , H01M10/486
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H02J 7/007194 of the battery
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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: 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]

Abstract

A method for preheating a battery of an electrically driven motor vehicle, in particular an electric vehicle or a hybrid vehicle, controls a charging process and a discharging process of the battery in such a way that a minimum temperature of the battery is attained at a departure time of the motor vehicle.

Claims

1. A method for preheating a battery of an electrically driven motor vehicle, the method comprising:

controlling both a charging process and a discharging process of the battery such that a minimum temperature of the battery is reached at a departure time of the motor vehicle.

2. The method according to claim 1, wherein

during the charging process and during the discharging process of the battery, a temporal profile of a charging current and of a discharging current of the battery is controlled, and the battery is heated by the charging current and by the discharging current.

3. The method according to claim 1, wherein

the departure time of the motor vehicle is set by a user, and

the battery is preheated depending on the departure time.

4. The method according to claim 1, wherein

the battery is preheated such that the minimum temperature of the battery is maintained continuously.

5. The method according to claim 1, wherein

electrical energy is fed to an electricity grid during the discharging process from the battery, which battery is connected to the electricity grid by a charging device of the motor vehicle.

6. The method according to claim 1, wherein

a temperature of the battery is measured, and

the charging process and/or the discharging process is controlled or regulated depending on the measured temperature.

7. The method according to claim 1, wherein

the vehicle is an electric vehicle or a hybrid vehicle.

8. A charging apparatus of an electrically driven motor vehicle, comprising:

a first interface to a temperature sensor for measuring a temperature of a battery of the vehicle, and

a second interface for receiving a set departure time, and

a control unit for setting a charging process and a discharging process of the battery based on the detected temperature and the set departure time, wherein

the control unit controls both the charging process and the discharging process of the battery such that a minimum temperature of the battery is reached at the set departure time of the motor vehicle.

9. The charging apparatus according to claim 8, further comprising:

a third interface to a control device of the motor vehicle for operating an air-conditioning system during the discharging process.

10. The charging apparatus according to claim 8, further comprising:

a fourth interface to a controller of an electricity grid.

11. The charging apparatus according to claim 8, wherein

the vehicle is an electric vehicle or a hybrid vehicle.

12. A motor vehicle comprising a charging apparatus according to claim 8.