Lithium battery ultra-low power consumption protection device based on battery protection circuit

Abstract

The invention discloses a lithium battery ultra-low power consumption protection device based on a battery protection circuit. The device comprises a battery, a battery protection chip, a load, a maincontrol processor, a triode, a first resistor and a second resistor, wherein a power supply positive input port and a power supply negative input port of the battery protection chip are electricallyconnected with a positive electrode and a negative electrode of the battery respectively; a voltage detection port of the battery protection chip is electrically connected with one end of the load; the other end of the load is electrically connected with the power supply positive input port and the power supply negative input port of the battery protection chip; a GPIO port of the main control processor is electrically connected with a base electrode of the triode, a collector electrode of the triode is electrically connected with a positive electrode of the battery, the first resistor and thesecond resistor are electrically connected between the positive electrode of the battery and the collector electrode of the triode in sequence, and an emitter electrode of the triode is electricallyconnected to the load. The lithium battery ultra-low power consumption protection device based on the battery protection circuit provided by the invention can realize longer standby time and prolong the service life of the lithium battery.

Description

technical field [0001] The invention relates to the technical field of lithium battery protection, in particular to a lithium battery ultra-low power consumption protection device based on a battery protection circuit. Background technique [0002] In recent years, more and more products such as PDAs, mobile phones, cameras, portable music devices, game consoles, mopeds, electric vehicles, and Bluetooth devices have begun to use lithium batteries as their main power source. The reason is nothing more than the advantages of lithium batteries such as small size, high energy density, no memory effect, high cycle life, high voltage, and low self-discharge rate. Since lithium batteries are different from nickel-cadmium and nickel-metal hydride batteries, it is necessary to consider the safety during charging and discharging and the prevention of characteristic deterioration. But because of this, the protection against overcharge, overdischarge, overcurrent and short circuit curr...

AI Technical Summary

Problems solved by technology

[0039] To sum up, the main disadvantage of the existing technology is that the quiescent current of the traditional lithium battery protection chip is several uA, so that the lithium battery must be charged if the standby time is not long enough, and the lithium battery is frequently charged and discharged, and the battery The service life will be greatly shortened

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