Lead-acid storage battery cycle life detection method

Abstract

The invention relates to a lead-acid storage battery cycle life detection method. The method includes the following steps of: 1) charging: constant-current constant-voltage charging is performed withI2A current and 2.2-to-2.4V voltage per cell, after charging is carried out for first preset time, constant-current constant-voltage charging is performed with I2A current and 2.35-to-2.55V voltage per cell until charging is completed; and 2) discharging: constant-current discharging is performed with third preset current for third preset time, constant-current discharging is performed with fourthpreset current for fourth preset time, the above discharging steps are cycled until an end voltage appears, wherein the third preset current is greater than the fourth preset current. The step 1) andstep 2) are performed once, a large cycle is recorded; the above steps are cycled, and the number of large cycles is accumulated until the capacity of a battery is lower than the termination capacityof the battery, and the number of accumulated large cycles is the cycle life of the battery. According to the method of the invention, the actual use of the battery is simulated, so that the measuredbattery cycle life is more accurate.

Description

technical field [0001] The invention belongs to the technical field of storage battery detection, and in particular relates to a detection method for the cycle life of a lead-acid storage battery. Background technique [0002] Lead-acid batteries are the most widely used and cover the most fields, and their performance is particularly important. The cycle life is an important indicator to measure the performance of the battery. [0003] At present, the cycle life test of lead-acid batteries adopts the method of constant current discharge, that is, the method of constant current discharge is used to simulate the usage of the battery. For example: enterprise standard 100DOD cycle life detection method, including two, one is to use the car charger to charge manually, discharge 42.0V / group to terminate, the time required for one cycle life is about 17 hours; the other is to use the simulated car charging mode , Discharge 42.0V / group terminates, and the time required for one cyc...

AI Technical Summary

Problems solved by technology

For example: enterprise standard 100DOD cycle life detection method, including two, one is to use the car charger to charge manually, discharge 42.0V / group to terminate, the time required for one cycle life is about 17 hours; the other is to use the simulated car charging mode , Discharge 42.0V / group terminates, and the time required for one cycle life is about 16 hours; the above two detection methods require a long cycle and low detection efficiency, which greatly delays the launch of new products

[0004] In addition, when the lead-acid battery is used on urban roads, various non-constant current discharges such as acceleration, suspension during driving, and restart will inevitably occur; Cause a certain impact, thereby affecting the service life of the battery

Therefore, there is a large error in simulating and testing the service life of the battery by means of constant current discharge, which cannot accurately reflect the actual usage of the user.

Images