BATTERY TEMPERATURE CONTROL SYSTEM

• US 20120200263A1
• Filed: 04/17/2012
• Published: 08/09/2012
• Est. Priority Date: 10/03/2008
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: MASUDA, Eiji
• Granted Patent: US 8,564,241 B2
• Time in Patent Office: Days
• US Class Current: 320/130
• 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 the cycle period and 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.

2. The battery temperature control system of claim 1,

wherein the limiting means limits one of the cycle period and the amplitude based on the other.

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

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.

4. 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.