Battery temperature detection method, control system, battery and unmanned aerial vehicle

Abstract

The embodiment of the invention provides a battery temperature detection method, a control system, a battery and an unmanned aerial vehicle. The method comprises the steps of acquiring an electrical parameter of a battery (60); determining internal resistance of the battery (60) according to the electrical parameter; and determining a current internal temperature of the battery (60) according to the internal resistance of the battery (60). The internal resistance of the battery (60) is determined according to a current and a voltage of the battery (60), the internal resistance of the battery (60) is the most effective value of representing chemical activity of a lithium ion battery, compared with a temperature of a battery cell surface sensed by a temperature sensor, the determined internal temperature of the battery (60) is more approximate to the actual temperature of the interior of the battery cell of the battery (60) according to the internal resistance of the battery (60), and acrash accident of the unmanned aerial vehicle (100) flying due to excessively low battery temperature is prevented.

Description

technical field [0001] The embodiments of the present invention relate to the field of unmanned aerial vehicles, and in particular to a battery temperature detection method, a control system, a battery and an unmanned aerial vehicle. Background technique [0002] In the prior art, unmanned aerial vehicles use lithium-ion batteries as the power supply. In order to prevent the performance of lithium-ion batteries from being affected by temperature, a temperature sensor is attached to the surface of the battery cell of the lithium-ion battery, and the temperature sensor senses the temperature on the surface of the battery cell. And transmit the temperature of the battery core surface to the flight controller, and the flight controller determines whether to allow the unmanned aerial vehicle to take off according to the temperature of the battery core surface sensed by the temperature sensor. [0003] However, the temperature on the surface of the cell does not represent the temp...

AI Technical Summary

Problems solved by technology

[0003] However, the temperature on the surface of the cell does not represent the temperature inside the cell. For example, when a lithium-ion battery is transferred from a low-temperature environment to a normal temperature environment, the temperature on the surface of the cell rises rapidly as the temperature of the surrounding environment increases, while the temperature inside the cell The temperature did not rise quickly, causing the temperature sensed by the temperature sensor to be higher than the temperature inside the battery cell. The flight controller determined that the temperature of the lithium-ion battery had reached the take-off condition based on the temperature on the surface of the battery cell sensed by the temperature sensor, allowing the flight The controller took off, and at this time the temperature inside the battery cell was still very low, the chemical activity inside the lithium-ion battery was still very low, and the discharge capacity was insufficient, which caused the unmanned aerial vehicle to explode.

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