External capacitor short circuit detection circuit for battery protection chip and detection method

Abstract

The invention discloses an external capacitor short circuit detection circuit for a battery protection chip, which comprises a grounded capacitor C0, a comparator A0 with the positive electrode connected with the other end of the capacitor C0, reference voltage VREF with the negative electrode grounded and the positive electrode connected with the negative electrode of the comparator A0, a switchK2 with one end connected with the output end of the comparator A0 and grounded, a K1 with one end connected with the switch K2 and the other end connected with an external current source, a switch S1connected with the external current source, a pull-up resistor R1 with one end connected with the switch S1 and the other end connected with the capacitor C0, a switch S0 connected with the pull-up resistor R1 and a pull-down resistor R0 with one end grounded and the other end connected with the switch S0. By using the above circuit, before the battery protection chip triggers related protectiondetection, through detection on existence of the capacitor, the battery is ensured to work in an absolutely safe environment, no static power consumption is introduced when the battery is in a normalenvironment, the whole power consumption of the battery protection chip is reduced, and the use value and the promotion value are thus high.

Description

technical field [0001] The invention relates to a detection circuit and a detection method, in particular to an external capacitance short-circuit detection circuit and a detection method for a battery protection chip. Background technique [0002] The battery protection chip is an essential part of electronic equipment with batteries. It is used to provide reliable protection for the safe operation of the battery and ensure that the battery can provide energy for the electronic equipment normally. In order to ensure the battery life as much as possible, the static power consumption of the protection chip must As small as possible, based on the above basis, it is especially important for the battery protection chip to provide safe and reliable protection and small static power consumption. [0003] Due to the specific environment where the battery is installed and used, such as mobile phones, mobile power supplies, drones and other electronic equipment, it is inevitable to v...

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Problems solved by technology

[0007] The purpose of the present invention is to provide an external capacitor short-circuit detection circuit and detection method for battery protection chips, which mainly solves the problem that

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