Battery temperature control system

• US 8,564,241 B2
• Filed: 04/17/2012
• Issued: 10/22/2013
• Est. Priority Date: 10/03/2008
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Masuda, Eiji
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): PIGGUSH, AARON C
• Application Number:
  US13/448,570
• Publication Number:
  US 20120200263A1
• Time in Patent Office: 553 Days
• Field of Search: 320/104, 320/130, 320/134, 320/136, 320/152, 320/153, 702/56, 702/142, 701/111
• US Class Current: 320/104
• CPC Class Codes: H02J 7/00309 Overheat or overtemperature protection
• CPC Class Codes: H02J 7/0049 Detection of fully charged condition
• CPC Class Codes: H02J 7/007194 of the battery
• CPC Class Codes: H02J 7/1423 with multiple batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A battery temperature control system, in temperature rise control, sets a maximum chargeable current and a maximum dischargeable current based on detection values of current, voltage, and temperature of a high-voltage battery, and controls charging/discharging power so that the current of the high-voltage battery does not exceed the maximum chargeable current or the maximum dischargeable current. For this reason, it is possible to prevent the high-voltage battery from abnormal heating and promptly raise its temperature according to change in the internal state of the high-voltage battery. In this control, a plurality of electrical equipment is selectively used. The amplitude of charging/discharging is controlled to reduce vibration noise and driving force fluctuation.

Claims

1. A battery temperature control system that carries out temperature rise control to raise temperature of a battery mounted in a vehicle by periodically repeating charging and/or discharging of the battery, the battery temperature control system comprising:

limiting means for limiting at least either of a cycle period or an amplitude of charging and/or discharging of the battery so that vibration noise and/or driving force fluctuation is reduced during execution of the temperature rise control; and

vehicle speed detecting means for detecting vehicle speed,

wherein the limiting means limits at least either the cycle period or the amplitude in accordance with the vehicle speed detected by the vehicle speed detecting means;

wherein a limitation value of the at least either the cycle period or the amplitude is mitigated with an increase in the vehicle speed; and

wherein the limiting means limits the amplitude based on both the cycle period and the vehicle speed.

2. The battery temperature control system of claim 1, further comprising:

driving intention detecting means for detecting driver'"'"'s driving intention, wherein the limiting means limits at least either the cycle period or the amplitude in accordance with the driver'"'"'s driving intention detected by the driving intention detecting means.

3. A battery temperature control system that carries out temperature rise control to raise temperature of a battery mounted in a vehicle by periodically repeating charging or discharging of the battery, the battery temperature control system comprising:

a processing system, including a processor, configured to limit at least either a cycle period or an amplitude of the charging or discharging of the battery so that vibration noise or driving force fluctuation is reduced during execution of the temperature rise control; and

a vehicle speed detector configured to detect a vehicle speed;

wherein the processing system is configured to limit said at least either the cycle period or the amplitude in accordance with the vehicle speed detected by the vehicle speed detector;

wherein a limitation value of said at least either the cycle period or the amplitude is mitigated with an increase in the vehicle speed; and

wherein the processing system is configured to limit the amplitude based on both the cycle period and the vehicle speed.

4. The battery temperature control system of claim 3, further comprising:

a driving intention detector configured to detect a driver'"'"'s driving intention, wherein the processing system is configured to limit said at least the cycle period or the amplitude in accordance with the driver'"'"'s driving intention detected by the driving intention detector.