In recent years, with the rapid development of data center industry, people pay more and more attention to the security of data center, and the storage battery has become the focus of attention. In order to solve the battery in use, we need to look at it from the point of view of the system, in order to use the battery, power security has a greater help. Figure 1 is the system model of the computer room. When the power is cut off, the battery acts as an emergency power supply. The battery in the database may have more than 90% of the life cycle rarely encountered power failure, but the battery must always be in normal condition, otherwise the battery can not discharge, the consequences will be very serious. So keeping the battery in a healthy and reliable state is the only way to keep the power in the data center safe. According to the survey, 65 per cent of the respondents considered that ups battery failure was the main cause of the outage of the data centre; ups system failure accounted for the largest proportion (25 per cent) in 2016; and lead-acid batteries were the main cause of ups failure with a 50 per cent probability.Battery failure can actually be divided into three reasons: First, quality problems, such as leakage and micro-short circuit. In general, the UPS grounding system shall comply with the IEC60346 low voltage grounding system standard. This means that for most ups, the center wire of the battery pack and the Battery Rack are grounded. So when the battery pack leakage, electrolyte flow to the battery rack, the battery pack will form a short circuit, causing an accident. If there is a micro-short-circuit battery in the battery pack, when the battery discharge, the micro-short-circuit battery voltage will drop sharply, resulting in less standby time. The second issue is ge maintenance, and table 1 is the international battery test maintenance standard. Although the maintenance specifications of the project are not many, but the data room because of the large number of storage batteries, there are also hundreds less, many can even reach the gold. So these programs can’t be 100% reliable. And battery charging, different battery manufacturers may have different charging voltage requirements, if set according to a uniform standard, can cause the battery to undercharge or overcharge, prolonged undercharging and overcharging can result in premature battery life terminationThe final problem is battery aging. Table 2 shows the charging and discharging principle of the battery. As can be seen from table 2, side effects exist throughout the battery life cycle, which is the root cause of battery aging. In short, traditional maintenance methods alone are not sufficient to maintain high battery availability. Is there a better way to maintain it? In fact, the Battery Management System (BMS) is a good solution. But to improve the availability of the battery through bms, we should not only understand the actual performance data of the battery for the first time, but also monitor the running status of the battery in real time, find out the hidden trouble in time and send an alarm, instruct the repairman to handle it correctly, avoid unnecessary accidents, accurately assess the battery health condition (Soh = residual capacity/rated capacity) , provide a basis for battery replacement and effective use of ladders. It not only reduces the risk of the system using the battery, but also avoids the unnecessary waste of resources.The key to improve the battery utilization rate is (1) to accurately collect the key characteristic information of each battery, judge the battery leakage situation, and issue an alarm to prompt the user to solve the problem, avoid Fire 2 condition monitoring connection tape: Closely Monitor the change of the temperature and contact internal resistance of the battery terminal, analyze the data from two aspects, judge the loose situation of the connection tape, issue an alarm to prompt the user to solve the problem, fire Prevention 3 MICRO-SHORT-CIRCUIT FAULT MONITORING: Closely Monitor whether the battery open-circuit voltage has micro-short-circuit fault, and issue an alarm to prompt users to solve, to avoid insufficient battery power. (2) accurate analysis and judgment of Battery Information Data. Accurate estimation of SOC and Soh: by analyzing and summarizing the collected data, more accurate SOC and Soh can be obtained by using the neural network algorithm, which can effectively guide the operation and maintenance of battery 2, self-diagnosis of power supply charging management parameters: through self-diagnosis of battery voltage and ambient temperature, analyze whether the parameters of uniform charging, floating charging and power supply temperature compensation are set correctly, and if the settings are wrong, aLARM MAINTENANCE PERSONNEL 3 management: through the discharge current and set capacitor load current comparison, can determine whether the power capacity is normal, if there is an error, alarm maintenance personnel. (3) visually display the data results and provide targeted maintenance guidance.

Intelligent charging control: through the intelligent control of battery charging, after the battery is fully charged, the charging circuit can be disconnected to avoid battery overcharging, reduce grid corrosion and water loss and other side effects. In order to further delay the aging of the battery itself, make the battery in the best health state, and give full play to its original performance in the whole life cycle, in order to ensure the safe operation of system 2, high temperature protection: under high temperature conditions, the system can disconnect the charging circuit, on the one hand, greatly reduce the aging rate of the battery at high temperature, on the other hand, improve the high temperature performance of the battery, the intelligent charge control and the high temperature protection measures relate to the battery circuit control, the limited charge circuit and the discharge circuit, battery Management System for each battery alarm line has a complete library of experts. The battery management system is designed to ensure the seamless discharge interval of the battery is 0 Ms. the related parameters and states are comprehensively analyzed, and the fault causes are determined step by step. This not only increases the efficiency of operation and maintenance, but also reduces the manpower and material resources required for maintenance work, daily automated testing: automatic testing of battery equipment according to operating and maintenance management systems and procedures, and according to rules set by the user, and generate test report, improve test efficiency, reduce the error rate of manual test. Through the Battery Management System can let the operator understand the cause of alarm, through the expert system for fault analysis and alarm guidance, so that maintenance becomes easy. Battery Management Systems should enable anyone who does not know about batteries to become a battery maintenance expert through the system platform.