Protecting method and apparatus for battery undervoltage

Abstract

The under-voltage protection method includes the following steps: inputting the cell voltage as power source voltage to the voltage comparator; comparing the power source voltage with one preset reference voltage in the voltage comparator; and cutting off the power supply loop from the cell in case the power source voltage is lower than the preset reference voltage, or else returning back to the comparing step. The present invention also provides one under-voltage protector, which includes under-voltage protecting circuit and cell on-off controlling circuit. The present invention can realize the under-voltage protection of cell simply and reliably at low cost and without need of software control and data communication, electromagnetic interference and environment dependence.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a battery undervoltage protection method and device. Background technique [0002] In the network communication system, a power failure of the mains will cause the suspension of the use of the network communication equipment, thereby interrupting the communication service. In order to enable the communication business to be carried out normally when the mains power is cut off, the equipment in the network communication system is generally equipped with a battery, and the battery is used to continue to supply power to the network communication equipment when the mains power is cut off, so as to solve the power consumption in the case of a mains power failure. supply, so as to ensure the normal operation of communication services. [0003] Reasonable allocation of battery capacity can make the communication service uninterrupted and ensure the normal operation of the...

AI Technical Summary

Problems solved by technology

[0016] Since the voltage-specific monitoring module will occupy the position of the communication equipment business board, the capacity of the main business of the communication equipment will be reduced, and the cost of the network communication equipment will increase to a certain extent.

[0017] At the same time, since the voltage-specific monitoring module needs to communicate with the rectifier module and the backplane to complete related functions, this requires that the voltage-specific monitoring module, the rectifier module and the backplane must be compatible, and the use range of a certain voltage-specific monitoring module is limited. limit

[0018] The voltage-specific monitoring module controls the battery under-voltage protection. In fact, it has gone through a first-level A / D conversion, and often requires software. There are many control devices, complicated circuits, and the control method is too complicated.

There are high-voltage 48V and low-voltage small signals. The layout and wiring in the module are exquisite, the implementation is difficult, and the development cycle is long; and the chance of single point failure increases, such as A / D converter, single-chip microcomputer, memory, etc. Any failure, or even software When an error occurs, it may lead to the inability to protect the battery from undervoltage; the communication between the devices in the module and the background of the network management system is a high-speed signal, generally using 9.6k, 19.2k bits and other frequencies, and the high-frequency signal passes through the communication port and the public ground. Lines and other channels interfere with the surrounding environment, which will affect the design of EMC (electromagnetic compatibility)

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