Residual power display system and residual power display method for electric vehicle

Abstract

The invention discloses a residual power display system and a residual power display method for an electric vehicle. The system comprises a motor controller of the electric vehicle, a motor, a battery component, a voltage detector, a display and a processor, wherein the motor is controlled by the motor controller; and the battery component is used for supplying power to the motor and the motor controller. The processor obtains an initial voltage value corresponding to the battery component by utilizing the voltage detector, obtains the rotating speed of the motor from the motor controller to calculate the speed per hour of the electric vehicle, compares the speed per hour with a predetermined speed per hour threshold value and determines to display the initial voltage value on the display according to a comparison result, or obtains the output voltage value of the battery component periodically from the voltage detector, calculates an average voltage value periodically, and selects a low average voltage value and displays the low average voltage value on the display.

Description

technical field [0001] The present invention relates to an electric vehicle power display system and a power display method, and in particular to an electric vehicle residual power display system and a residual power display method for determining the timing of battery power detection based on the speed of the electric vehicle. Background technique [0002] Please refer to FIG. 1A, which shows a schematic diagram of the battery discharge curve of an electric vehicle in the prior art, FIG. 1B, a schematic diagram of the value deviation or drift of an analog voltage meter for an electric vehicle in the prior art, and FIG. 1C, a schematic diagram of an electric vehicle in the prior art. Schematic diagram of the value floating of the car digital voltage meter. In FIG. 1C , the digital voltage meter 2 is combined with a liquid crystal display 61 . [0003] In the prior art, taking a battery with a specification of 12V12Ah as an example, in order to obtain enough electric energy ...

AI Technical Summary

Problems solved by technology

[0011] This is more likely to cause the user to misjudge that the battery is damaged, or the battery is not fully charged after charging, so that the charging behavior will continue and the battery life will be shortened

What's more, it is easy to cause users to misjudge the failure of power controllers, displays or voltage meters and other instruments, and perform unnecessary instrument update operations, resulting in unnecessary instrument update costs

On the other hand, it is easy to cause users to have doubts about the quality of batteries or related instruments, thereby damaging the goodwill of related battery manufacturers or instrument manufacturers.

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