Battery charging control circuit

Abstract

The invention discloses a battery charging control circuit which comprises a direct-current voltage adjustment sub module and a battery charging sub module. The direct-current voltage adjustment sub module comprises a first connection end, wherein voltage output by the first connection end passes through a voltage adjustment circuit and then is transmitted to a second connection end through a first filter circuit, and the voltage adjustment circuit comprises a voltage output device. The battery charging sub module comprises the second connection end, wherein voltage output by the second connection end passes through a battery charging circuit and then is transmitted to a battery pack through a second filter circuit, the battery charging circuit comprises a battery charging circuit voltage current output device and a battery charging circuit voltage current output detection device, and the battery charging circuit voltage current output detection device feeds back detected signals to the battery charging circuit. Under the condition that external input voltage keeps unchanged, flexible voltage transformation is achieved, the battery charging control circuit is suitable for meeting charging requirements of various battery packs and the occupied area of a circuit board is small.

Description

technical field [0001] The invention relates to a control circuit, in particular to a battery charging control circuit. Background technique [0002] When the train video surveillance server is briefly powered off, it is easy to cause data loss or even damage to the surveillance storage hard disk. In this context, using uninterruptible protection power supply to provide stable power supply to the train video surveillance server can avoid this risk. The uninterrupted protective power supply uses a rechargeable battery as backup power. The rechargeable batteries used in ordinary uninterruptible power supplies are generally lithium-ion batteries or lead-acid batteries. Lithium-ion batteries are affected by temperature in a closed system environment and there are potential safety hazards. Lead-acid batteries are large in size and have a short lifespan, which is not suitable for train video surveillance. server. The uninterruptible power supply of the train video surveillance ...

AI Technical Summary

Problems solved by technology

The rechargeable batteries used in ordinary uninterruptible power supplies are generally lithium-ion batteries or lead-acid batteries. Lithium-ion batteries are affected by temperature in a closed system environment and there are safety hazards. Lead-acid batteries are large in size and have a short lifespan, so they are not suitable for train video surveillance. server

The uninterruptible power supply of the train video surveillance server uses a small-sized and high-safety lithium iron phosphate battery as a backup power supply. At present, most of the commonly used lithium iron phosphate battery charging circuits are controlled by single-chip microcomputers, which are suitable for large-scale lithium iron phosphate battery packs, but for small capacity , the application environment with a small number of serial parallels, this method is too complicated, and it is not conducive to realizing the charging function on a limited printed circuit board

Moreover, this method also needs to burn firmware, which will increase the production process and increase the complexity of production

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