Protection circuit, battery and aircraft

Abstract

The invention relates to the technical field of batteries, and discloses a protection circuit, a battery and an aircraft. The protection circuit comprises a charging and discharging circuit, an overvoltage protection circuit and a delay circuit. The overvoltage protection circuit and the delay circuit are connected with the charging and discharging circuit; when the input voltage input to the charging and discharging circuit is greater than a preset voltage threshold, the overvoltage protection circuit is switched on, so that the charging and discharging circuit is in a switch-off state to becut off; when the input voltage is decreased from a value greater than the preset voltage threshold to a value equal to the preset voltage threshold, the overvoltage protection circuit is disconnected, the delay circuit is used for delaying, the charging and discharging circuit enters a switch-on state after a preset delay time, and accordingly, the charging and discharging circuit is switched on.By the protection circuit, influences on normal power supply of the battery and damage to related devices, both caused by repeated fluctuations of the voltage output by the protection circuit at thecritical point of overvoltage protection, can be avoided, and accordingly, the service lives of the battery and the aircraft are prolonged.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a protection circuit, a battery with the protection circuit, and an aircraft with the battery. Background technique [0002] Batteries are an integral part of driving various electronic devices. For example, taking an aircraft such as a UAV as an example, the battery supplies power to the various systems of the UAV, such as powering the power unit of the UAV to drive its motor to rotate, thereby driving its propeller to rotate, so as to realize the power of the UAV. flight. In the application of the battery, in order to protect the battery itself and prolong the service life of the electronic equipment, some circuits with protective functions are usually set in the power supply circuit of the battery, so as to avoid abnormal power supply from causing damage to the components of the battery or electronic equipment. damage. For example, some overvoltage protection is usually d...

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found at least the following problems in the related art: Although the above-mentioned protection circuit can realize the function of overvoltage protection, the above-mentioned protection circuit often performs repeated switching actions at the critical point of overvoltage protection , resulting in constant fluctuations in the voltage output by the protection voltage, affecting the normal power supply of the battery, and even endangering the life of related components of electronic equipment, damaging electronic equipment, for example, causing accidents such as drone explosions

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