A method for diagnosing the fault of electric vehicle liquid cooling pipeline resistance increase based on electronic water pump
A technology of electric vehicles and electronic water pumps, applied in vehicle testing, pumps, pump devices, etc., can solve the problems of time-consuming, labor-intensive and inconvenient, and achieve the effects of low cost, scientific and reasonable diagnostic methods, and good user experience
Active Publication Date: 2022-04-26
XIANGTAN UNIV
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Problems solved by technology
[0004] In the current known technical means, it is necessary to disassemble the liquid cooling pipeline on the electric vehicle and have the manufacturer and maintenance manufacturer use a professional test bench to test the liquid cooling pipeline to determine whether there is a failure of increased resistance. This method is time-consuming very inconvenient
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[0037] A pure electric vehicle uses a liquid-cooled pipeline system for thermal management. The coolant is water. The composition of the liquid-cooled pipeline can be found in the attached figure 1 , in order to better illustrate the diagnosis method of the fault of liquid cooling pipeline resistance increase, figure 1 The motor and controller of the electronic water pump and the control module (BMU) of the battery management system are also drawn. In this embodiment, in order to realize the fault diagnosis function of increased resistance of the liquid-cooled pipeline, appropriate software and hardware improvements are made mainly based on the chip of the electronic water pump controller, so that its storage and computing functions are more powerful. The liquid cooling pipeline system includes three types of heat exchangers: a heat exchanger for temperature regulation of the battery pack, a heat exchanger for temperature regulation of the main drive motor of electric vehicles...
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The invention discloses a method for diagnosing the fault of increased resistance of a liquid cooling pipeline of an electric vehicle based on an electronic water pump. The electronic water pump includes a centrifugal pump, an adjustable speed motor and a controller. Permanent storage, read and record the speed, voltage and current of the adjustable-speed motor during the use of the electric vehicle, look-up table calculation of the power value of the adjustable-speed motor, and compare and judge the power value. The method provided by the invention is scientific and reasonable, has low cost, is stable and reliable, has wide adaptability, is easy to realize, and does not interfere with the normal use of the electric vehicle.
Description
technical field [0001] The invention relates to the field of electric vehicles, in particular to a method for diagnosing the fault of increased resistance of a liquid cooling pipeline of an electric vehicle based on an electronic water pump. Background technique [0002] Electric vehicles have outstanding advantages such as green environmental protection, comfort and energy saving, and are an important field of current economic and social development. At present, most electric vehicles use lithium-ion power battery packs to provide energy to the main drive motor to drive the electric vehicle, and use a liquid-cooled pipeline system to manage the heat of the battery pack and the main drive motor to ensure that the working process of the two is within a reasonable temperature range. . The liquid cooling pipeline usually consists of a centrifugal pump and its supporting adjustable speed motor, pipeline, solenoid valve group, expansion tank and several heat exchangers. The sole...
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IPC IPC(8): G01M17/007G01L13/00F04D13/06F04D15/00
CPCG01M17/007G01L13/00F04D13/06F04D15/0066
Inventor 张翮辉常春平游浩林孟步敏刘金刚卢海山
Owner XIANGTAN UNIV