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Power supply circuit of battery

A technology for power supply circuit and battery charging, which is applied to battery circuit devices, circuit devices, battery load switching, etc., and can solve problems such as communication systems not working properly.

Inactive Publication Date: 2018-05-04
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because, after the backup power supply is fed, the communication system may still not work normally when the mains power supply is normal.

Method used

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  • Power supply circuit of battery

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Embodiment Construction

[0029] In order to make the purpose of the invention, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0030] see figure 1 with figure 2 , a schematic circuit diagram of a battery-powered circuit in the present invention, comprising: a main power circuit unit 11, a constant current feedback circuit unit 12, a constant voltage feedback circuit unit 13, and a control circuit unit 14, wherein:

[0031] The main power circuit unit 11 includes an energy storage element L1, and the main power circuit unit 11 is used to: control the charging of the energy storage element L1 and the battery BAT by the constant current power su...

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Abstract

The invention discloses a power supply circuit of a battery. The power supply circuit comprises a main power circuit unit, a constant-current feedback circuit unit, a constant-voltage feedback circuitunit and a control circuit unit, wherein the main power circuit unit comprises an energy storage component and is used for controlling a constant-current power supply to charge the energy storage component and a battery or charging the battery by the energy storage component according to a control signal output from the control circuit, and the control circuit unit is used for outputting the control signal to the main power circuit unit according to a current comparison result and a voltage comparison result. Compared with the prior art, the power supply circuit of the battery has the advantages that the constant-current charging function of the circuit is started and an input voltage is enabled not to be pulled down by the battery when difference between an output voltage of an AC / DC power supply and a battery voltage is excessively large and a charging current of the battery exceeds a set value.

Description

technical field [0001] The invention belongs to the field of battery technology, and more specifically, the invention relates to a battery power supply circuit. Background technique [0002] Lithium battery energy storage is used as a backup power supply for communication equipment. When the mains power cannot be supplied, the front-end AC / DC power supply cannot work. Due to its particularity, it needs to continuously supply power to the equipment. The backup power supply plays a vital role at this time. . However, if the mains power cannot be supplied for a long time, the energy of the backup power cannot be replenished in time, and the energy of the backup power is also exhausted, in order to ensure that the battery will not be over-discharged, the BMS will turn off the battery output and stop external discharge; until the mains supply is normal, The AC / DC constant current power supply will charge the communication system and backup battery. If the minimum working voltag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0072H02J7/0036H02J2207/20H02J7/00714H02J7/007182H02J7/00H02J7/0068
Inventor 叶伏明沈高松
Owner CONTEMPORARY AMPEREX TECH CO
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