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Cooling control method for vehicle-mounted power battery of hybrid electric vehicle

A hybrid vehicle and power battery technology, applied in battery temperature control, batteries, secondary batteries, etc., can solve problems such as excessive cooling, high energy consumption, and low cooling efficiency

Active Publication Date: 2014-07-02
湖南科霸汽车动力电池有限责任公司
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  • Description
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Problems solved by technology

[0011] The purpose of the present invention is to overcome the deficiencies of cooling system cooling hysteresis, excessive cooling, insufficient cooling, low cooling efficiency, high energy consumption and high noise in the prior art, and provide a cooling system with good energy saving effect, high cooling efficiency, and effective Cooling control method for vehicle-mounted power battery of hybrid electric vehicle to avoid excessive cooling, insufficient cooling and cooling hysteresis

Method used

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  • Cooling control method for vehicle-mounted power battery of hybrid electric vehicle
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  • Cooling control method for vehicle-mounted power battery of hybrid electric vehicle

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0051] Such as figure 1 The illustrated embodiment is a cooling control method for a vehicle-mounted power battery of a hybrid electric vehicle, comprising the following steps:

[0052] Step 100, use the power battery internal resistance tester to measure the data of the power battery internal resistance R changing with the battery temperature and the battery state of charge parameter SOC (State of charge), and compare the battery internal resistance R, battery temperature and the corresponding SOC The data is stored in the battery management system;

[0053] Step 200, the battery management system measures the operating current I of the battery, the load voltage U of the battery, and the temperature T of the cooling air at the air inlet of the battery pack through current, voltage and temperature sensors f，in and the temperature T of the coo...

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Abstract

The invention discloses a cooling control method for a vehicle-mounted power battery of a hybrid electric vehicle, which comprises the following steps: acquiring related parameters of a battery collected by a battery management system sensor, and calculating the heating value of the battery in unit time according to the related parameters; calculating the theoretical heat exchange value of the battery surface in unit time according to the heating value of the battery, the surface temperature of the battery and the temperature of cooling air at air inlets / outlets of a battery pack based on the heat transfer theory; determining the cooling air quantity in unit time according to the temperature of cooling air at the air inlets / outlets of the battery pack and the theoretical heat exchange value; and changing a blower output signal to enable a blower to output the calculated cooling air quantity. The cooling control method disclosed by the invention has the characteristics of correcting the air quantity of the blower in real time and ensuring the smooth temperature change of the battery according to the change trend of the surface temperature of the battery.

Description

technical field [0001] The invention relates to the technical field of automotive battery safety control, in particular to a cooling control method for a vehicle-mounted power battery of a hybrid electric vehicle, which has good energy-saving effect, high cooling efficiency, and effectively avoids excessive cooling, insufficient cooling, and cooling lag. Background technique [0002] During the operation of a hybrid electric vehicle, the power battery is being charged and discharged at any time, which is accompanied by a large amount of heat generation, resulting in a high internal temperature of the battery. The characteristics of large temperature inertia and large delay cause the battery surface temperature to change slowly. In the traditional control method of the power battery cooling system, the fan generally adopts the method of controlling the air volume of the fan based on the temperature of the battery surface. The slow change of the battery surface temperature ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/60H01M10/613H01M10/625H01M10/633H01M10/6563
CPCH01M2220/20Y02E60/10
Inventor 孙志文储爱华朱建新于海生马智涛张彤王瑞平
Owner 湖南科霸汽车动力电池有限责任公司
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