Performance evaluation method and device of pure electric vehicle liquid cooling system and electric vehicle
A technology for pure electric vehicles and electric vehicles, which is applied in the field of vehicle control of electric vehicles and can solve problems such as the inability to quantitatively evaluate liquid cooling systems.
Active Publication Date: 2019-10-18
BEIJING ELECTRIC VEHICLE
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[0003] The purpose of the embodiments of the present invention is to provide a performance evaluation method and device for a pure electric vehicle liquid cooling system and an electric vehicle, so as to solve the problem that the liquid cooling system cannot be quantitatively evaluated in the prior art
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[0077] l is the number of neurons in the hidden layer. According to currently recognized experience, the number of neurons in the hidden layer is 2 times the input amount plus 1. Therefore, in the embodiment of the present invention, l=9;
[0078] is a radial basis function, wherein the radial basis function of the embodiment of the present invention is a Gaussian radial basis function;
[0079] ||x-c i || is the distance from the input vector to the center of the node.
[0080] It should be noted here that the RBF neural network is pre-created, such as image 3 The architecture diagram of the RBF neural network shown in the following standard temperature rise T normal In the process, it can be applied directly. That is, the current external ambient temperature T outside , current output power P, output torque T q and the rotational speed R as input, the current standard temperature rise T is obtained through the RBF neural network normal .
[0081] Step 13, according t...
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The invention provides a performance evaluation method and device for a pure electric vehicle liquid cooling system and an electric vehicle, and relates to the technical field of vehicle control. Themethod comprises the steps that the revolving speed and the first temperature of a drive motor and a characterization signal indicating whether the liquid cooling system has a fault or not are periodically obtained; when the revolving speed of the drive motor is higher than the first preset revolving speed, the first temperature is larger than the first preset temperature, and the liquid cooling system has no faults, and after preset duration, the second temperature of the drive motor and the current standard temperature rise of the drive motor are obtained; according to the difference value between the second temperature and the first temperature and the standard temperature rise, the performance parameter Qi of the liquid cooling system in the ith sampling cycle is estimated; after the electric vehicle ends the power-on cycle, the current average performance parameter Q of the liquid cooling system is estimated according to a plurality of performance parameters Qi of the liquid cooling system. By means of the technical scheme, the quantification of the performance parameters of the liquid cooling system is achieved, and a guarantee is provided for the after-sales repairs and thefine design of a drive motor control strategy.
Description
technical field [0001] The invention belongs to the technical field of complete vehicle control of electric vehicles, and in particular relates to a performance evaluation method and device of a pure electric vehicle liquid cooling system and the electric vehicle. Background technique [0002] Pure electric vehicles drive the wheels through motors to drive the vehicle. During the driving process, the drive system will generate a lot of heat. In order to ensure the normal operation of the drive system, it is necessary to control the temperature of the drive system below a certain value through certain cooling methods. Currently , most electric vehicles dissipate heat from the drive system through the liquid cooling system. Therefore, the performance of the liquid cooling system is directly related to whether the drive system can work normally. The drive system cannot work normally, therefore, the quantitative evaluation of the performance of the liquid cooling system has beco...
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IPC IPC(8): B60K11/02B60R16/023G01M17/007G07C5/08
Inventor 李玮代康伟梁海强刘超范江楠
Owner BEIJING ELECTRIC VEHICLE