Method for detecting early failure interface problem of lead storage battery

The invention discloses a method for detecting an early failure interface problem of a lead storage battery, and the method comprises the steps: sequentially carrying out the overdischarge and large-current recharging of a battery, monitoring the voltage change of the battery during the large-current recharging, and determining a monitored voltage time curve graph; determining a tangent change in the voltage time curve graph, screening an abnormal feature segment of the voltage time curve graph according to the tangent change, and determining an identification segment of the peak according to the length of the abnormal feature segment; identifying a peak in the voltage time curve graph, and judging whether the peak accords with an interface problem; when a plurality of peaks exist, the process is repeated until all the peaks are traversed; the detection process is simplified, whether the interface problem exists in the battery or not is rapidly judged through the steps of over-discharging and large-current re