Battery system and automobile

• US 8,643,341 B2
• Filed: 08/11/2011
• Issued: 02/04/2014
• Est. Priority Date: 02/23/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Hamaguchi, Hiroshi, Watanabe, Masanori
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): PIGGUSH, AARON C
• Application Number:
  US13/207,495
• Publication Number:
  US 20110291622A1
• Time in Patent Office: 908 Days
• Field of Search: 320/104, 320/134, 320/150, 320/155, 903/903, 903/907
• US Class Current: 320/150
• CPC Class Codes: B60L 3/0007 Measures or means for preventing or attenuating collisions
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 58/13 Maintaining the SoC within a determined range
• CPC Class Codes: B60L 58/24 for controlling the temperature of batteries
• CPC Class Codes: B60L 58/26 by cooling
• CPC Class Codes: B60L 58/27 by heating
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/486 for measuring temperature
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/615 Heating or keeping warm
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/633 characterised by algorithms, flow charts, software details or the like
• CPC Class Codes: H01M 10/6563 with forced flow, e.g. by blowers
• CPC Class Codes: H01M 10/6571 Resistive heaters arrangements for heating the battery by its resistance to the internal current H01M10/637
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

Disclosed is a battery system wherein safety of a lithium secondary battery can be enhanced by efficiently deactivating (inactivating) lithium metal deposited on a negative electrode of the lithium secondary battery. Also disclosed is an automobile. Specifically disclosed is a battery system comprising a lithium ion secondary battery and a temperature control unit for controlling the temperature of the lithium ion secondary battery. The temperature control unit performs such a control that the temperature T of the lithium ion secondary battery is maintained within the following range: 55° C.<T<65° C., for a predetermined time.

Claims

1. A battery system comprising:

a lithium on secondary battery; and

a temperature control device for controlling the temperature of the lithium on secondary battery,

wherein the temperature control device performs control to maintain the temperature T of the lithium ion secondary battery within the range;

55°

C.<

T<

65°

C. for a predetermined length of time, wherein

the lithium ion secondary battery is adapted to be mounted as an automobile drive power supply in an automobile,

the battery system is configured to enable charging of the lithium ion secondary battery by use of electric power supplied from an external power supply during parking of the automobile, and

the temperature control device performs control to maintain the temperature T of the lithium ion secondary battery within the range;

55°

C.<

T<

65°

by cooling or heating the lithium ion secondary battery throughout an entire period of time in which the lithium ion secondary battery is charged with electric power supplied from the external power supply from a start of charging the lithium ion secondary battery with electric power to an end of the charging of the lithium ion secondary battery with electric power.

2. The battery system according to claim 1, wherein

the temperature control device performs control to maintain the temperature of the lithium ion secondary battery at 60°

C. for a predetermined length of time.

3. The battery system according to claim 1, wherein

before performing second temperature control to maintain the temperature T of the lithium ion secondary battery within the range:

55°

C.<

T<

65°

C., the temperature control device performs first temperature control to maintain the temperature T of the lithium ion secondary battery within the range;

35°

C.≦

T≦

55°

C.

4. The battery system according to claim 3, wherein

the temperature control device performs the first temperature control to maintain the temperature T of the lithium ion secondary battery at 45°

C., and performs the second temperature control to maintain the temperature T of the lithium ion secondary battery at 60°

C.

5. An automobile equipped with the battery system according to claim 1.