A charging circuit with protection for displaying electric quantity

Abstract

The invention discloses a protected charging circuit capable of displaying the electric quantity. The charging circuit comprises a battery, a protecting circuit and a charge circuit, and is characterized by further comprising an electric quantity display circuit, wherein the protecting circuit, the battery, the electric quantity display circuit and the charge circuit are connected in sequence, and a switch S1 is arranged between the positive pole of the battery and the electric quantity display circuit; the electric quantity display circuit comprises a lamp LED 0, n LED lamps, n triodes, (n+1) capacitors, 2n resistors and a chip U1, the lamp LED 0 displays the battery shape, the chip U1 comprises n same-phase input ends, n reversed-phase input ends and n output ends, the battery shape displayed by the lamp LED 0 is divided into n portions, each portion corresponds to one LED lamp, and n is greater than or equal to 2; during charging, the n LED lamps prompt charging in a horse race lamp mode, less and less LED lamps flicker along with increasing of the electric quantity, and the LED lamps display the electric quantity after being turned on constantly. The protected charging circuit capable of displaying the electric quantity can display the charging state in the horse race lamp mode in a charging process, and meanwhile the purpose of preventing overcharging can be achieved.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a charging circuit with protection for displaying electric quantity. Background technique [0002] The 21st century is an era of rapid technological and economic development. Following the rapid development, the energy storage industry has also developed a strong momentum. Lithium batteries have high energy density, high output power, long life, high charge and discharge efficiency, wide applicable temperature range, low self-discharge, good load characteristics, good temperature storage performance, low internal resistance, no memory effect, fast charging, Features such as high security, high reliability, low cost, and reusability have been widely used in portable electronic products. Portable electronic devices, such as the appearance of touch-screen mobile phones such as Apple mobile phones and Samsung mobile phones, and the appearance of various tablet computers, ...

AI Technical Summary

Problems solved by technology

However, under the conditions of overcharge, overdischarge, overtemperature or external circuit short circuit, etc., the pressure and heat of the lithium-ion battery will increase greatly, which will easily cause electric sparks, combustion and even explosion. Therefore, there is no doubt that the lithium-ion battery needs an additional Protect the circuit, and energy storage products must require a multi-functional and safe charging system to ensure their normal charging work

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