The battery capacity is the basis of determining product work life and time of use. It is also the case of testing the product in the market in the market. If the capacity is abundant, he is one of the key costs. The larger the battery capacity, the working time will be more long, So we have seen a lot of non-capacity battery packs, in fact, the factory reducing battery costs in order to drive the market with price.1, reduce the floating charge voltage method: This method is to refer to a "discharge switch" on the floating rectifier, when placed in the discharge switch position, the floating voltage of the rectifier is automatically reduced from 54V to 48V, and the voltage of the battery is also Immediately drop from 54V to 51.8V (the electric power of the battery is approximately 2.16V / only) then dropped from 51.8V to 48V, and the battery can be more than the random monitor voltage drop curve.
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2, online discharge method: At this time, simply adjust the floating voltage setting or turn off all rectifiers, use the actual load device to load the battery immediately transferred to the discharge state from the floating state, and then the maintenance personnel are observed, and record a battery Discharge voltage, current (can generally select one hour or two-hour discharge time), with the discharge total voltage is not less than 45.6, and then determine whether there is no backward battery by random monitoring voltage by each battery, and can pass through discharge current Multiping the number of electron number (data sheet provided by the manufacturer) by the discharge time is calculated to calculate the approximate discharge capacity, and it is inferred that the performance of a battery pack is good.
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3, the fake load discharge method, using this method discharge can only be taken out of a set of battery packs to disengaged from the floating capacity, and connect various forms of load resistance as the fake load at the time of discharge, then The discharge current (or 3 hours 1 hour discharge current) can be selected from 10 hours, and the battery voltage, temperature, and the like are recorded, and finally, at 1.8V (10 hours) as a final voltage, then it can be calculated a battery. The actual capacity of the group is easy. (1 hour discharge termination voltage is 1.75V / single)
Sealed battery capacity test (pseudo-load discharge method) Operating steps:
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(1) Battery group balance charging
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(2) Battery set out of the floating circuit
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(3) Battery group access to fake load
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(4) Adjust the false load switch to make the battery pack at a 10-hour current discharge.
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(5) The total voltage of the battery group per hour, single battery voltage, discharge current, room temperature.
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(6) The battery pack voltage is gradually decreased, and the discharge current will be reduced; the discharge current should be adjusted in time to maintain the 10-hour rate.
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(7) When a single battery voltage is close to 1.80V, it should pay close attention to the battery voltage and increase the number of meter memories.
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(8) Electricity is immediately aborted when a battery voltage dropped to 1.80V.
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(9) Remove the open circuit, measure the static voltage of the battery pack.
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(10) On the monitoring module, set the floating voltage equal to the battery pack static voltage.
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(11) Press the battery pack after the capacity test into the floating circuit.
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(12) Verify the monitoring module to make it a battery charging current ≤ 2.5i10.
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(13) Adjust the floating voltage of the monitoring module to restore it to the original float.
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(14) According to the battery discharge record, the battery discharge capacity is calculated.
In order to ensure power supply, the rectifier is in the power-on state, and the floating charge voltage is lowered to a voltage at a slightly lower than normal discharge. Once the battery is abnormal, the rectifier will automatically power. The battery voltage value can be determined by the table. As in the topic, check the table's battery discharge one hour end voltage is 1.99V, then the floating voltage is set at 1.98 * 24 = 47.5V. Recommend: LiFePO4 Battery Manufacturer Energy storage battery Manufacturer Integrated machine energy storage battery series Manufacturer Lead lithium battery Manufacturer Outdoor Backup Battery Manufacturer Portable outdoor power supply Manufacturer Power battery Manufacturer Powerwall LiFePO4 Battery Manufacturer Battery rack Manufacturers Telecom LiFePO4 Battery Manufacturer Wall mounted battery storage Manufacturer China Lifepo4 Battery
