Electrochemical device and power supply control method

Abstract

An electrochemical device comprises a power supply main loop, a pre-charging circuit and a control module. The pre-charging circuit comprises a first switch and a thermosensitive element. The first switch is electrically connected to the control module and the power supply main loop, the thermosensitive element is electrically connected between the first switch and a load, and the control module is used for controlling the first switch to be switched on to switch on the pre-charging circuit so as to pre-charge an electric device through the pre-charging circuit. And after the pre-charging of the electric device reaches a preset condition, the control module controls the first switch to be switched off to switch off the pre-charging circuit so as to supply power to the electric device through the power supply main loop. The invention further provides a power supply control method of the electrochemical device. The pre-discharge circuit has the advantages of high integration level, low power consumption cost, high reliability and the like, and can avoid the safety problem of battery explosion caused by heating of the pre-discharge resistor.

Description

technical field [0001] The present application relates to an electrochemical device and a power supply control method of the electrochemical device. Background technique [0002] There is a large capacitor inside the electric vehicle controller. If there is no pre-charging circuit, when the vehicle is powered on, there is often no charge or only residual voltage on the capacitor. It is equivalent to directly connecting the battery power supply to both ends of the capacitor. An instantaneous short circuit may damage the battery and other high-voltage devices. Therefore, the function of the pre-charging circuit is to avoid the large current impact when powering on, thereby protecting the battery and high-voltage devices. [0003] In the prior art, a pre-discharge resistor and a control switch are usually used to realize the pre-charge function. However, the pre-discharge resistor will seriously heat up when subjected to overload power for a certain period of time. When the ...

AI Technical Summary

Problems solved by technology

In order to ensure the reliability of the pre-discharge resistor, it is usually necessary to use a high-power resistor, which will take up a lot of space and cannot be installed in the space of the miniaturized battery structure. The application is very limited, especially when the control switch fails. Cause the pre-discharge resistor to continue to heat up, which may cause smoke and burnout of the device, and even cause the battery to explode

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