Electric vehicle battery temperature self-calibration detection method
A battery temperature, electric vehicle technology, applied in the direction of radiation pyrometry, measuring electricity, measuring devices, etc., can solve the problems of slow temperature changes, long working hours of temperature sensors, and decreased sensitivity of temperature sensors, so as to improve stability and The effect of longevity
Active Publication Date: 2020-11-10
JIANGXI DIBIKE
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Problems solved by technology
In the prior art, the temperature sensor is usually used in the correction process to collect the temperature of the battery management system and the surrounding temperature. However, the temperature sensor is instantaneous, and the temperature propagation has a certain delay, especially when the car is in some working conditions (such as just starting, long-term low gear and slow speed, etc.), the temperature of the fuel auxiliary drive unit may change slowly due to slow conduction, so that the temperature acquisition process of the fuel auxiliary drive unit needs to be continuously corrected by the ambient temperature, which makes the temperature sensor in The working time at the approximate temperature is longer, which will easily cause the sensitivity of the temperature sensor to decrease
In addition, the heat exchange between the temperature of the environment where the car, engine and battery are located and the temperature of the engine and battery takes a certain amount of time, and the temperature value detected by the temperature sensor, even after being corrected for the ambient temperature, is difficult to be compared with the battery management system. How to control the battery working state such as charging or discharging to establish an accurate and fast model
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[0046] Such as figure 1 As shown, according to a preferred embodiment of the present invention, a kind of electric vehicle battery temperature self-calibration detection method suitable for hybrid electric vehicles is provided, comprising:
[0047] (1) The detection parameter sets of N distributed batteries are respectively collected by the temperature sensor at t1, t2, t3, t4, t5, t6, t7 and t8. Each set corresponds to the position of each battery, and each set Both include: temperature T1 of the fuel auxiliary drive unit 燃料 , battery temperature T1 电 and ambient temperature T1 环 , where N is an integer greater than 5;
[0048] (2) During the period from time t1 to time t8, the temperature T2 of the fuel auxiliary drive unit of N distributed batteries is photographed and output by the infrared detector 燃料 , battery temperature T2 电 The infrared picture, thus obtains N infrared pictures;
[0049] (3) When the temperature T1 燃料 When the preset temperature warning value i...
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The present invention provides a electric vehicle battery temperature self-correcting detection method suitable for a hybrid vehicle on infrared temperature detection in order to better control the battery temperature of the hybrid vehicle. The method overcomes the problem that for a hybrid car whose battery is distributely arranged, especially a 4WD hybrid car whose battery is distributely arranged, the fuel auxiliary drive unit does not have a real-time reference on the temperature of the power assist drive unit. Through the numerical processing of the infrared image, the calibration parameters for correcting battery control of the battery management system are obtained, which improves the stability and life of the battery.
Description
technical field [0001] The invention belongs to the technical field of automobile battery control, and in particular relates to a self-correcting detection method for electric automobile battery temperature. Background technique [0002] At present, most of the battery management systems of electric vehicles are configured in the front or rear of the vehicle in a centralized structure. However, with the development of electric vehicles, people are increasingly aware of the advantages of hybrid vehicles in terms of energy saving and driving convenience compared with electric vehicles. For the driving system of the hybrid electric vehicle widely used at present, it is provided with a fuel-assisted driving unit (usually a gasoline engine or a diesel engine) and an electric-assisted driving unit (usually a storage battery), and the two cooperate to work together. Realize the driving of hybrid electric vehicles. [0003] When a hybrid vehicle accelerates or climbs a slope, it r...
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IPC IPC(8): G01J5/00G01R31/374
CPCG01J5/00G01J2005/0077
Inventor 刘文平
Owner JIANGXI DIBIKE