Vehicle Engineering (VE), Volume 3, 2015 doi: 10.14355/ve.2015.03.005
www.seipub.org/ve
Research on the Charging Regime of Intelligent Charger of Automotive Valve‐ regulated Lead‐acid Battery Suyun Luo*1, Peng Jia2, Yangchun Wu3, Lei Tang4 Shanghai University of Engineering Science, No.333, Longteng Road, Songjiang District, Shanghai, China, 201620 *1
luosuyun@sues.edu.cn; 2122100352@qq.com; 31060156185@qq.com; 4tommy9106@sohu.com
Abstract Charger has a great impact on the performance and service life of battery and charging regime is significant for intelligent charger. Researchers usually combine two or three charging methods to get a good performance charging regime, but the effect is still less than satisfactory and cannot charge and renovate the battery at the same time. This article studies on charging regime of intelligent charger based on normal charging methods character analysis of VRLA battery and references to some charger products regimes, and gives a seven phases regime including Resonant composite pulse charging, soft start, bulk charge, absorption, battery test, recondition and float. From the result shown in experiments, this charging regime resolves the problem of failing to charge and renovate batteries simultaneously, implementing a high performance charging. Keywords Valve Regulated lead‐acid battery; Charging Regime; Intelligent Charging; Resonant Composite Pulse Charging
Introduction Lead‐acid batteries were invented more than a century ago and now they remain the most widely used type of rechargeable battery and are used in many applications such as automotive, traction and stationary applications, uninterruptible power supplies (UPS), solar traffic lights, telecommunications and energy storage devices for renewable energy. Rechargeable batteries used for automotive are divided into starter battery and power battery. Starter batteries used in normal gasoline engine and diesel engine automobile are usually Lead‐acid batteries, while power batteries applied in pure electric vehicle and hybrid electric vehicle are typed into lead‐acid battery, NI‐MH battery, Ni‐Cd battery, sodium‐sulfur battery and Lithium‐ion battery etc. Although with the disadvantages of low energy and low power density, lead‐acid batteries are still ranked an important position in automobile field for good price, convenient manufacture and maintenance. The performance and service life of battery are affected greatly by charging regime and so do the performance of vehicle. This article will discuss the intelligent charger charging regimes of valve regulated lead‐acid battery. Types and Charging Methods of Lead-Acid Batteries Applied in Vehicle Types of Lead‐Acid Batteries Applied in Vehicle Lead‐acid batteries are classified into flooded (or wet) batteries and VRLA (Valve‐regulated lead‐acid) batteries according to whether gas emission is permitted during operation.VRLA batterie is developed base on traditional flooded batteries. It has better performances on service life and maintenance. In order to extend the service life and minimize maintenance, immobiliezed electrolyte was used in VRLA battery. With the immobilized electrolyte, the oxygen generated during the charge is captured and recombined in the battery, in the so‐called “oxygen recombination cycle”, and gases are allowed to escape only if the internal pressure exceeds a certain level by means of pressure‐release valves so that water loss during battery operation is minimized. There are two distinctly different types of technologies for immobilizing the electrolyte in VRLA batteries. One is the absorptive glass mat (AGM) technology. For AGM batteries, the sulfuric acid electrolyte is captured in an absorptive glass mat separator. The other is gel technology. In GEL batteries the sulfuric acid solution is mixed
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