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Cooling system for on-vehicle secondary battery

A technology of secondary battery and cooling system, applied in the field of cooling system, can solve the problems of overheating of secondary battery, passenger discomfort, cooling of secondary battery, etc., and achieve the effect of ensuring whether there is abnormality and suppressing discomfort

Active Publication Date: 2016-10-26
TOYOTA JIDOSHA KK
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, when the cooling fan is driven at a fixed duty ratio, it is of course difficult to perform appropriate cooling according to the temperature of the secondary battery. For example, if the rotation speed is insufficient to sufficiently cool the secondary battery, there is a possibility that the secondary battery may overheat.
[0008] In addition, in order to cope with the high temperature of the secondary battery, constant control of the cooling fan in a high output state (such as the maximum duty ratio) has been studied, but this will cause excessive cooling (overcooling) of the secondary battery
In addition, there was a problem that the noise of the cooling fan became louder, causing discomfort to passengers.

Method used

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  • Cooling system for on-vehicle secondary battery
  • Cooling system for on-vehicle secondary battery
  • Cooling system for on-vehicle secondary battery

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Embodiment Construction

[0025]

[0026] Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, a system configuration of a hybrid vehicle 90 equipped with an on-vehicle secondary battery cooling system 80 according to the present embodiment will be described. also, figure 1 The dotted line in represents the signal line.

[0027] This hybrid vehicle 90 is a hybrid vehicle that uses two types of power sources (motor generators 16 and 18 and engine 20 ) for driving wheels 26 . Main battery 10 for driving a vehicle is connected to positive and negative input terminals of system main relay 13 via positive bus bar 11 a and negative bus bar 12 a. The main battery 10 is, for example, a rechargeable secondary battery such as a nickel metal hydride battery or a lithium ion battery.

[0028] The positive side output terminal and the negative side output terminal of the system main relay 13 are connected to the step-up transformer 14 via the positive side...

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Abstract

If the battery temperature (TB) of the main battery (10) is equal to or higher than the first temperature (T0) after a hybrid power vehicle is started, the cooling system performs first constant control for driving the cooling fan (40) with a first command value a predetermined duration and also performs the problem detection processing based on an actual rotation rate of the cooling fan (40) during the constant control. In addition, the battery temperature (TB) of the main battery (10) is equal to or higher than the first temperature (T0) during inhibition of the first constant control under a predetermined condition and a noise level within a vehicle interior is equal to or higher than a predetermined value (Lo), the cooling system performs second constant control for driving the cooling fan (40) with a second command value (D3) and performs the problem detection processing based on an actual rotation rate of the cooling fan (40) during the second constant control. And in this way, discomfort of passengers and over-temperature of a secondary battery can be suppressed, and a chance for detection of the cooling fan is fully ensured.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2015-080686 filed on April 10, 2015, and the contents thereof are incorporated herein by reference. technical field [0002] The present invention relates to a cooling system for cooling a secondary battery for driving a hybrid vehicle. Background technique [0003] A hybrid vehicle is equipped with a secondary battery (battery) that stores electrical energy for driving the vehicle. The temperature of the secondary battery rises as charge and discharge are performed due to its own internal resistance. Therefore, in the prior art, some solutions have been proposed, that is, a cooling fan is provided around the secondary battery, and the secondary battery is forcedly air-cooled by the cooling fan. [0004] For example, Japanese Patent Application Laid-Open No. 2010-158964 discloses a cooling device for electrical components of a vehicle, which includes a cooling fan near a secondary battery. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18H01M10/625H01M10/613H01M10/48B60L50/16
CPCH01M10/613H01M10/625B60L58/26H01M10/48H01M2220/20H01M10/633H01M10/6563Y02T10/70Y02E60/10
Inventor 泉纯太町田清仁土生雅和落合清惠
Owner TOYOTA JIDOSHA KK
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