1results about How to "Accurate detection and judgment" patented technology

The invention provides a battery pack, a battery pack acquisition line impedance anomaly detection method and a vehicle, and relates to the technical field of vehicles. An impedance detection loop composed of a detection switch and a first resistor is arranged in a battery pack, a battery management system obtains a first voltage value and a second voltage value of the input end of an analog-to-digital converter of an analog front-end chip by controlling opening and closing of the detection switch, and then the first voltage value and the second voltage value are obtained by combining a preset impedance judgment threshold value. And whether the acquired line impedance is abnormal can be accurately judged. According to the battery pack provided by the invention, early and accurate detection of the impedance abnormity of the acquisition line can be realized, and the situation that the battery management system misjudges the voltage of the battery monomer due to the impedance abnormity of the acquisition line is avoided, so that potential safety hazards such as over-charge, over-discharge, short circuit and thermal runaway caused by unbalance of charge and discharge strategies are prevented, the after-sales maintenance cost is reduced, and the service life of the battery pack is prolonged. And the operation safety and stability of the power battery pack in a new energy electric vehicle, an energy storage system and industrial equipment are ensured.