Battery protection system and method

Abstract

The embodiment of the invention discloses a battery protection method which comprises the following steps: collecting voltages at two ends of a large brake switch by a whole vehicle control unit, one end of the large brake switch is connected with a storage battery, and the other end of the large brake switch is connected with a vehicle-mounted storage battery direct-current transformer; and then comparing the voltage difference between the two ends of the large-gate switch, determining that the vehicle is abnormally closed when the voltage difference between the two ends of the large-gate switch is greater than a preset threshold value, i.e., the large-gate switch is disconnected before the key is not OFF, and aiming at the condition, the vehicle control unit controls the storage battery direct-current transformer to be powered off. Therefore, the power battery does not supply power any more, vehicle energy waste is avoided, and the power battery is protected.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to a battery protection system and method. Background technique [0002] Some new energy vehicles include mechanical brakes. Under normal circumstances, the operation process of stopping the vehicle includes: the driver first turns off the key, and then disconnects the mechanical brakes. However, it often occurs that the driver forgets to turn off the key and directly disconnects the mechanical gate. And due to the particularity of the electrical principle of new energy, when the vehicle is in a high-voltage state, since the vehicle battery DC transformer DC / DC has been supplying power to the vehicle controller and other components, after the machine gate is disconnected, the high and low voltage of the vehicle cannot be disconnected. circuit, so the high and low voltage circuits are always working, resulting in waste of electric energy of the vehicle and power loss of the power ...

AI Technical Summary

Problems solved by technology

However, it often happens that the driver forgets to turn off the key and directly disconnects the mechanical gate

And due to the particularity of the electrical principle of new energy, when the vehicle is in a high-voltage state, since the vehicle battery DC transformer DC / DC has been supplying power to the vehicle controller and other components, after the machine gate is disconnected, the high and low voltage of the vehicle cannot be disconnected. circuit, so the high and low voltage circuits are always working, resulting in waste of vehicle power and power battery loss, which will not only affect the normal operation of the vehicle but also shorten the battery life

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