SYSTEM AND METHOD FOR REGULATING THE TEMPERATURE OF AN ELECTROCHEMICAL BATTERY

• US 20160141734A1
• Filed: 06/13/2014
• Published: 05/19/2016
• Est. Priority Date: 06/18/2013
• Status: Active Grant

• Current Assignee: Renault Sas (Renault)
• Original Assignee: Renault Sas (Renault)
• Inventors: BUI VAN, Anh Linh, ERCAN, Ali, LALLICH, Sylvain, PERICHON, Pierre
• Granted Patent: US 9,947,976 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/4207 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/615 Heating or keeping warm
• CPC Class Codes: H01M 10/617 for achieving uniformity or desired distribution of temperature
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/637 characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching means for preventing undesired use or discharge H01M50/572
• CPC Class Codes: H01M 2200/10 Temperature sensitive devices
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 50/574 Devices or arrangements for the interruption of current
• CPC Class Codes: H01M 50/581 in response to temperature
• 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 90/14 Plug-in electric vehicles

Abstract

A system and method regulate the temperature of an electrochemical battery. The system can be incorporated in a hybrid or electric motor vehicle including at least two electrical-energy-accumulating elements, each element including at least one electrochemical cell. The system increases the intensity of the value of the current flowing through the battery up to a first threshold value and includes a module for disconnecting and connecting an electrical-energy-accumulating element.

Claims

1-9. -9. (canceled)

10. A system for regulating the temperature of an electrochemical battery of a hybrid or electric motor vehicle, including at least two electrical-energy-accumulating elements, each comprising at least one electrochemical cell, the system comprising:

means for increasing an intensity of a value of a current flowing through the battery up to a first threshold value, including a module for disconnecting and connecting an electrical-energy-accumulating element.

11. The regulating system as claimed in claim 10, including a module for determining the electrical-energy-accumulating element(s) to be disconnected or connected as a function of temperature of the accumulating elements measured by a measurement means.

12. The regulating system as claimed in claim 10, in which the disconnection and connection module includes means for switching the flow of the current in the different electrical-energy-accumulating elements.

13. The regulating system as claimed in claim 10, in which the electrochemical cells are lithium-iron cells.

14. The regulating system as claimed in claim 10, in which the electrochemical battery includes N electrical-energy-accumulating elements and the disconnection and connection module is capable of disconnecting or connecting N−

1 energy-accumulating elements.

15. A method for regulating the temperature of an electrochemical battery of a motor vehicle having a hybrid or electric power train, including at least two electrical-energy-accumulating elements, each comprising at least one electrochemical cell, the method comprising:

increasing a value of an intensity of a current flowing through the battery up to a first threshold value by disconnecting or by connecting at least one of the electrical-energy-accumulating elements.

16. The temperature-regulating method as claimed in claim 15, in which the electrical-energy-accumulating element to be disconnected is determined as a function of a temperature and/or a location in the battery and/or a state of health of the electrical-energy-accumulating element.

17. The temperature-regulating method as claimed in claim 15, in which the electrical-energy-accumulating element is determined as a function of power required by a user.

18. The temperature-regulating method as claimed in claim 16, in which the temperature of the electrical-energy-accumulating elements is homogenized by switching a flow of the current in the different electrical-energy-accumulating elements.