Double-battery high-temperature charging protection circuit

Abstract

The invention provides a double-battery high-temperature charging protection circuit. The double-battery high-temperature charging protection circuit comprises a detection circuit, a charging management IC, a first battery and a second battery. The detection circuit comprises a first comparator, a second comparator and an inverter. By implementing the embodiment of the invention, for the electronic equipment with two batteries, only one charging management IC can be used for carrying out temperature detection on the two batteries, and high-temperature charging protection is carried out according to a temperature detection condition so that the charging safety of a double-battery electronic product can be ensured by low-cost hardware.

Description

technical field [0001] The invention relates to the technical field of circuits, in particular to a double-battery high-temperature charging protection circuit. Background technique [0002] For common electronic products with batteries, charging at high temperature (greater than 45°C) is prohibited, because charging at high temperature will damage the battery body, which may cause the risk of battery expansion or explosion. Generally, a system with a battery must have a power management IC to manage the charging and discharging process of the battery. A key point of the power management IC is to avoid charging the battery at high temperatures. When the temperature is in a normal environment (10~ 45°C) before charging. [0003] At present, the common power management ICs on the market only have one NTC interface, that is to say, they can only detect the ambient temperature state of one battery, so as to protect the battery from charging under high temperature conditions, bu...

AI Technical Summary

Problems solved by technology

[0003] At present, the common power management ICs on the market only have one NTC interface, that is to say, they can only detect the ambient temperature state of one battery, so as to protect the battery from charging under high temperature conditions, but there is nothing to do for products with two batteries. , unless another power management IC is added to add an NTC interface

However, due to the high price of charging management ICs, adding a new power management IC will greatly increase the hardware cost of electronic equipment.

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