An electric vehicle battery protection circuit

Abstract

The invention discloses an electromobile battery protecting circuit which comprises a main circuit, a voltage detecting module, a battery loop current detecting module, a battery temperature detecting module, an electromobile inertia detecting module, an electromagnetic relay switch module and a singlechip control module, wherein the detecting modules are used for detecting the battery monomer voltage, the battery loop current and the battery temperature, transmitting signals to the singlechip control module, and analyzing the variation trend of the current, the voltage and the temperature. With the adoption of the circuit, the external voltage and current of an electromobile battery are detected and the the electromobile battery under abnormal states such as over-voltage, over-current, under-voltage and the like is cut off to be protected, the output features of the battery are predicated in advance, the charge abnormity of the battery is detected and protected, and furthermore, due to the inertia detection on an electromobile, a power supply circuit is cut off under the condition that the battery is in good condition when the electromobile has various faults, therefore, the the power supply circuit is prevented against battery combustion and explosion.

Description

technical field [0001] The invention relates to the fields of pure electric vehicles and hybrid electric vehicles, in particular to a battery protection circuit for electric vehicles. Background technique [0002] At present, the battery protection technology of electric vehicles includes two parts: one is to isolate the battery from the outside by attaching metal or non-metal devices to the outside of the battery, preventing battery damage or reducing battery collision and vibration, so as to prevent battery combustion and explosion , to achieve the protection of electric vehicles and personnel. The second is to cut off the power supply of the electric vehicle in time under abnormal circumstances by controlling the on-off of the battery circuit of the electric vehicle, so as to realize the protection of the battery and personnel. It mainly judges whether the working state of the battery is normal through the comparison and analysis of the voltage and current detection of t...

AI Technical Summary

Problems solved by technology

These methods only realize the management of the battery by detecting the parameters of the external current and voltage, without estimating and predicting the internal state of charge of the battery, and cannot predict the internal charge characteristics of the battery, and the control also has hysteresis. Timely prediction of battery failure and protection of circuits

At the same time, these devices do not take into account the timely protection of the battery when the electric vehicle has various faults such as collisions and rollovers when the battery is intact, so as to prevent the battery from being damaged due to collisions, etc., resulting in combustion and explosion.

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