Charging voltage filtering method, device and equipment and computer readable storage medium

Abstract

The invention provides a charging voltage filtering method and device, electronic equipment and a computer readable storage medium. The charging voltage filtering method comprises the following steps: collecting the maximum voltage in the automobile charging process; when it is determined that the maximum voltage is larger than the voltage threshold value, the maximum voltage difference value in the preset time period is calculated; logically judging a voltage interval to which the highest voltage difference value belongs; and executing a corresponding filtering strategy command according to the voltage interval to which the highest voltage difference value belongs. According to the embodiment of the invention, the charging stop of the whole vehicle due to voltage abrupt change can be avoided, so that the insufficient charging amount of the whole vehicle and deviation from the real endurance level are avoided.

Description

technical field [0001] The present application belongs to the field of charging voltage filtering, and in particular, relates to a charging voltage filtering method, device, electronic device, and computer-readable storage medium. Background technique [0002] In the charging environment of new energy vehicles and charging piles, high-voltage components will cause certain radiation and interference effects on the vehicle wiring harness; during the charging process, the battery management system (BMS) will be affected by electromagnetic compatibility from other high-voltage components. Due to the influence of Electromagnetic Compatibility (EMC) interference, it will cause a certain range of jumps in the single voltage acquisition module (such as figure 1 shown), the voltage acquisition module will accidentally mutate more than 200mV (such as figure 2 shown), or a small-amplitude jump with a certain period of regularity (such as image 3 In the process of cell voltage jump,...

AI Technical Summary

Problems solved by technology

[0002] In the charging environment of new energy vehicles and charging piles, the high-voltage components will cause certain radiation and interference effects on the vehicle wiring harness; during the charging process, the battery management system (Battery management system, BMS) will be subject to electromagnetic compatibility from other high-voltage components Electromagnetic Compatibility (EMC) interference will cause a certain range of jumps in the single voltage acquisition module (such as figure 1 shown), the voltage acquisition module will accidentally change over 200mV (such as figure 2 shown), or regular small-amplitude jumps with a certain period (such as image 3 shown); in the process of cell voltage jump, it is estimated according to the charging threshold or State of charge (SOC), which will lead to inaccurate estimation of the real SOC or after the BMS detects that the jump voltage value is higher than the charge cut-off voltage value , the SOC estimate will be corrected to 100% stop charging or stop charging early

EMC interference causes a sudden change in voltage to stop the charging of the vehicle, which will eventually lead to insufficient charging of the vehicle and deviation from the true battery life

[0003] Therefore, how to avoid the sudden change in voltage to stop the charging of the whole vehicle, thereby avoiding insufficient charging of the whole vehicle and deviating from the true endurance level is a technical problem urgently needed to be solved by those skilled in the art.

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