Vrla Battery Pulse Charging Mechanism And Its Implementation

The development history and the present status of charging algorithms and the failure modes caused by it for valve-regulated lead-acid (VRLA) batteries are reviewed in this paper.Based on the studies on the charge features and the pulse charging principle of VRLA batteries a novel pulse charging technique is presented in this paper.A novel intelligence charging device is designed and made using technique of on-off power source and micro-control, which can generate positive/negative pulse charging and the result of pulse charging curver verify the proposed scheme. The parameters of pulse charging can be seted using program and meet the experimental require of researching pulse charging's the parameters.Under the partial state of charge (PSOC), the 100% Deepth of Discharge (DOD) experiments for the EV battery were made by using different charging algorithms.Under the high rate partial state of charge (HRPSOC) , the re-cycle experiments for the HEV battery were made. Also the recover experiments for the failed battery on the above experiments were made by using pulse charging algorithms. The experiments indicate that pulse-charge algorithm can make battery a good cycle life and pulse- charge has a good recovery effect on failed EV battery and failed HEV battery. The experimental results from different algorithms were analyzed by the positive and negative voltage testing method, SEM,XRD measurements etc. This research works show that the electric conductivity and the mechanical strength of both the active material and the interface are much improved, and the generation of the non-active Pbso₄ can be effectivily suppressed and its reactivation is effectively improved so that the re-cycle life of VRLA battery is greatly improved by using this method.The experiments and research of different pulse charging parameters were made in this paper. The pulse charging algorithms and its parameters that adapt different VRLA battery in different fields is presented. One good way that slove or slow battery's fail in the fact use was found.