System and method for using parallel power supply for electric vehicle test

Abstract

The invention provides a parallel power supply utilization system and method for electric vehicle tests. The system comprises a power battery (3), a constant voltage source (4) and a constant voltage source control system (5). The power battery is connected in parallel with the constant voltage source, and is connected with a driving motor and a power assembly. The constant voltage source and the constant voltage source control system are connected through serial ports. During the test, the power battery and the constant voltage source act together as the power source of the driving motor (2), and the voltage in the constant voltage source and a current collecting system monitor the current of the test system. When the current of the test system is close to the output upper limit of the constant voltage source, the outputted voltage of the constant voltage source is lowered through the constant voltage source control system so as to make the power battery provide power. When the current of the test system is close to the output lower limit of the constant voltage source, the outputted voltage of the constant voltage source is raised through the constant voltage source control system so as to make the power battery absorb the excessive power. According to the invention, a power battery and a constant voltage source are in parallel use, which not only increases the power upper limit of the constant voltage source without frequent stopping to charge the power battery, but also automatically allocates the proportion of the power supply by the power battery and the constant voltage source when in use so as to achieve the purpose of tests of the driving motor and power assembly.

Description

technical field [0001] The invention belongs to the field of automobile testing, and in particular relates to a technology for using a power supply for electric automobile testing when a drive motor and a power assembly for hybrid and pure electric automobiles are used for bench testing. Background technique [0002] Drive motor and powertrain are one of the key components of hybrid and pure electric vehicles, and their performance directly affects the driving ability of the vehicle. Performance and reliability testing of electric motors and powertrains is an essential part of the automotive development process. However, with the improvement of the user's requirements for the performance of the vehicle, the power of the motor is also gradually increased, so that it exceeds the upper limit of the output power of the existing constant voltage source. If the high-power constant voltage source is replaced, a lot of money will be wasted; if the power battery is used, frequent sh...

AI Technical Summary

Problems solved by technology

If the high-power constant voltage source is replaced, a lot of money will be wasted; if the power battery is used, frequent shutdowns are required to charge the battery, which will waste a lot of test time and human resources.

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