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Advice about UPS battery maintenance -

by:KEBO      2020-04-18
1, the battery charged floating pressure monitor ( 1) In large UPS generally are equipped with a monitoring device, by monitoring the setting of float charging voltage on the floor, to monitor the health status of the battery, processed if it is abnormal. ( 2) Measured with a multimeter float charging voltage of the battery. 2, the capacity of the battery test normally on battery capacity test regularly, can choose the following capacity test method. An off-line measuring method ( In the case of conditions allow) ( 1) After the battery charged from UPS let stand for 1 h, the environment temperature is 25 ℃ & plusmn; 5 ℃ under the condition of external ( Smart) Dummy load, with 10 hours discharge rate discharge test. ( 2) Before the start of discharge shall be measured battery terminal voltage, temperature and time. ( 3) Discharge records should be measured during the battery terminal voltage, discharge current, indoor temperature, measuring time interval of 1 h, the discharge current fluctuation shall not exceed 1% of the specified value. ( 4) During the discharge voltage of the battery shall be recorded in measurement of and room temperature, measuring time interval of 1 h. In the final discharge measurement at any time, so that to accurately determine the time of discharge end voltage. ( 5) Discharge current multiplied by the discharge time is the battery capacity. In 10 hours of battery discharge, if the temperature is 25 ℃, the actual measuring the capacity of the period shall be in accordance with the type conversion into 25 ℃ when the capacity of the Ce: Ce = Cr / [ 1+K( 第t - 25℃) ] Type: t— The context in which the discharge temperature K— Temperature coefficient ( 10 hours discharge rate, K = 0. 006/℃; 3 hours discharge rate, K = 0. 008/℃; 1 hour rate is discharging, K = 0. 01/℃( 6) After the discharge, want to undertake to the battery charging, filling the quantity of released power of 1. More than 2 times. On-line measurement method ( 1) In dc power supply system, adjust output voltage to the voltage protection, UPS power supply by the battery to the actual load, find out the lowest voltage of the battery in the discharge, capacity, the worst of a storage battery as a capacity test object. ( 2) Open the UPS to recharge batteries, battery, such as after a full charge stability more than 1 h. ( 3) To ( 1) When discharge to find out the worst in the battery only 10 hours rate discharge experiment was carried out. Measure and record before and after discharge the battery terminal voltage, temperature, discharge time and room temperature. After every 1 h measurement record time, discharge fast to termination voltage, shall, from time to time measurement records, in order to accurately record the discharge time. ( 4) Discharge current multiplied by the discharge time is the battery capacity. If the room temperature is 25 ℃, should be in accordance with the type ( 1) Converted to 25 ℃ when the capacity. ( 5) After the discharge test, with the charger for the battery only to supplement the electric, restore its capacity. ( 6) According to the measured discharge curve drawing record data. Check the discharge test method in order to grasp the general capacity of the battery at any time, check the discharge test is necessary, the method is: ( 1) In the dc power supply system, adjust the UPS output voltage to the voltage protection, power supply by the battery to the actual load. Battery discharge measurement records before and after each battery terminal voltage, temperature, room temperature and discharge time. Released the rated capacity of 30% ~ 40%. ( 2) After the discharge, want to undertake to the battery charging, filling the quantity of released power of 1. More than 2 times. ( 3) According to measuring discharge curve drawing recorded data, reserved for future measurement again. Description: ( 1) Battery for UPS power supply system, an off-line measuring method is not recommended for capacity test. ( 2) On-line measurement method and check the capacity test, for itself have battery discharge test function of UPS equipment, need to open the battery to discharge the battery discharge detection function test. For without the function of UPS, need to shut off the ac input power, discharge experiment was carried out. Note ( 1) In capacity during testing to ensure the system is very important, so should know in advance when to do capacity test mains presence of planned power outages, standby generator set should be in good condition. ( 2) In front of the battery discharge capacity test, used multimeter, internal resistance meter, conductance meter for a preventive test the performance of the battery. ( 3) To ensure the accuracy of the capacity test, professional battery capacity should be adopted for the online test instrument and dummy load test. 3 big start instantaneous output current battery test in the process of actual use, UPS backup type of inverter power supply from the mains power supply to switch time required is less than 7 ms, general design for the 4 ~ 5 ms. Abnormal when the mains power supply, storage battery must be less than 4 ~ 5 ms time needed for the output load current. Such as in failure of the battery, battery could meet the requirements of above the terminal voltage and capacity, but when large current discharge is unqualified, this kind of circumstance belongs to exist hidden dangers, the battery has been in a state of unqualified. Due to the nature of instantaneous output current battery only when closing the utility to test, so in the case of unclear battery performance test is risky, generally is not recommended for the test.
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