Charging current safety control method

Abstract

The invention discloses a charging current safety control method. The method includes the steps of 1, acquiring a charging curve, to be specific, testing and sampling status changes in a battery charging process so as to obtain the charging curve; 2, in a constant-current charging state, monitoring ambient temperature, battery status, actual output capacity of a charger and actual output capacity of a power grid in real time, and adjusting charging current according to the acquired charging curve; 3, in a constant-voltage charging phase, adjusting the charging current according to an actual output of the charger; 4, in a trickle charging phase, acquiring the current battery status and charging current under the temperature environment according to the charging curve acquired in the step 1; 5, if the charging current is less than a preset threshold, ending charging, and stopping the charger from outputting. The method has the advantages that the charging current can be monitored in real time, real-time adjustment is performed according to comprehensive set current demands such as temperature environment, battery status and charger output, and charging safety is effectively guaranteed.

Description

technical field [0001] The invention relates to a battery management system, in particular to a charging current safety control method. Background technique [0002] At present, the battery management system monitors the charging current during the charging process, mainly to send the maximum allowable charging current to the charger according to the charging rate set by the battery manufacturer under different temperature environments, and requires the charger to output according to the required current. When the output capacity is limited, output according to the actual output capacity of the charger. Corresponding to the different requirements of charging current for different battery systems, even the same battery system has different requirements for charging current in different environments and different battery states. Carry out constant current charging according to the charging rate given by the battery manufacturer, regardless of whether the output of the charger...

AI Technical Summary

Problems solved by technology

Carry out constant current charging according to the charging rate given by the battery manufacturer, regardless of whether the output of the charger or the grid is stable or the actual condition of the battery. In the case of charging abnormalities such as changes, the charging current cannot be adjusted in real time according to the actual charging situation and battery status. These situations may lead to shortened battery life, prone to safety problems such as charging lines, charging equipment overheating and fire, or battery overcharging, etc. Happening

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