Electric motor coach storage battery protection system and method thereof

Abstract

The invention discloses an electric motor coach storage battery protection system and a method thereof, an auxiliary power supply provides a working power supply for a system voltage sampling circuit and maintains a power supply for a processor in a deep dormant state, and a main power supply is controlled by a main power supply control circuit and provides a working power supply for the system during normal work. A charging control circuit is respectively connected with the processor and a charger, the charger is connected with an automobile storage battery, the voltage sampling circuit is connected with the automobile storage battery and the processor, and by automatically detecting the voltage value of the automobile storage battery, when the voltage is reduced to be required to charge the automobile storage battery, the system is automatically connected with the vehicle-mounted DC / DC charger to charge the automobile storage battery; the voltage of the current battery is monitored in real time, and when the battery is fully charged and the voltage rises to a set voltage value, the system disconnects the charger and enters a deep sleep mode, and when the voltage of the storage battery drops again and needs to be charged, an external sampling circuit provides a trigger signal to wake up the system and charge the storage battery again.

Description

technical field [0001] The invention belongs to the technical field of new energy automobile parts, in particular to a battery protection system and method for electric passenger cars. Background technique [0002] With the development of automotive electronics technology, there are more and more electronic devices used in cars, especially for commercial electric buses. Due to the requirements of regulations and standards, many electronic monitoring devices are always in continuous operation, such as remote data monitoring systems. , the monitoring system of each operating platform, the battery management system, etc., require the low-voltage power supply system of the car to provide continuous and uninterrupted working power. Even when the car is stopped, the battery of the car still supplies power to the low-voltage system. After short-term or long-term parking in the field, if the low-voltage system is not charged in time during the period, it is easy to run out of batter...

AI Technical Summary

Problems solved by technology

[0002] With the development of automotive electronics technology, there are more and more electronic devices used in cars, especially for commercial electric buses. Due to the requirements of regulations and standards, many electronic monitoring devices are always in continuous operation, such as remote data monitoring systems. , the monitoring system of each operating platform, the battery management system, etc., require the low-voltage power supply system of the car to provide continuous and uninterrupted working power. Even when the car is stopped, the battery of the car still supplies power to the low-voltage system. After a short-term or long-term parking in the field, if the low-voltage system is not charged in time during the period, it is easy to run out of battery power, resulting in the failure of the vehicle to run or reducing the service life of the battery or even scrapping the battery.

[0003] In actual vehicle applications, in order to avoid battery power loss for vehicles that have been parked for a long time, maintenance personnel generally turn off the main power switch of the vehicle, but the load connected to the battery pile head is still in working condition, and the battery is still active. The discharge phenomenon exists. In order to ensure that the car battery has a safe voltage range when the vehicle is stopped, maintenance personnel are required to inspect each car, perform regular maintenance, charge vehicles with low voltage and maintain the battery regularly. Time-consuming and labor-intensive, but also increased labor costs

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