Operation and maintenance of German solar battery

The balanced charging of German solar battery has accumulated some experience everywhere, but it is difficult to grasp it reasonably. Long-term non-balanced charging or frequent balanced charging are harmful to battery packs. Specifically, it should comply with the regulations of manufacturers. It is also necessary to evaluate the current status of battery packs and determine whether balanced charging should be carried out. For some backward acid-proof batteries, they should be charged separately to restore their capacity. If the treatment is ineffective, they should be replaced. It is not suitable to charge the whole battery evenly.

Batteries that lag behind should be charged separately to restore their capacity. If the treatment is ineffective, they should be replaced. It is not appropriate to use the method of balanced charging for the whole group of batteries to deal with individual backward batteries, so as to prevent most normal batteries from being overcharged and discharged.

According to the investigation, the checking discharge cycle of German solar battery group varies from place to place. Due to the strict technical requirements, poor mastery of the work will affect the performance and service life of the battery group. Therefore, the key to VRLA batteries is to do a good job in daily operation and maintenance, so that the batteries are not overcharged or undercharged, and do not exceed the allowable temperature. If the battery is evaluated comprehensively, the checked discharge cycle can be extended appropriately.

The German solar storage battery should be checked and charged completely, and three checks and charges will be conducted every year. After six years of operation, VRLA batteries will not be in good general condition, and their capacity may decline. It is advisable to check the charge and discharge five to six times a year.

The floating charge voltage value of German sunlight battery should be revised with the change of ambient temperature. Its reference temperature is 25 C and the correction value is 3 mV when the temperature rises 1 C. That is to say, when the temperature rises 1 C, the floating charge voltage value of single VRLA battery with 2 V should be reduced by 3 mV, instead, the floating charge voltage should be increased by 3 mV. The operating temperature of VRLA battery should be kept at 5-30 C. The maximum temperature should not exceed 35 degrees Celsius.

The floating charge voltage of VRLA batteries should be controlled to (2.23-2.28) V when the temperature is 25 C, generally 2.25V. However, the value of floating charge voltage should be corrected with the change of ambient temperature. When the corrected value is (+1 C), it is (3-5) mV, which is generally suitable for 3 mV.  That is, when the temperature is increased by 1 degrees, the floating charge voltage should decrease (3~5) mV. Conversely, when the temperature is reduced by 1 degrees, the floating charge voltage should be increased (3~5) mV.

Temperature has an important influence on the life of German solar battery. It is required that the operating temperature should be kept between 5 and 30 C, and the maximum should not exceed 35 C. Those who can not meet the requirements should install air-conditioning or take other heating and cooling measures.

When the AC power supply interruption can not be restored in time, so that the discharge capacity of the battery group exceeds 20% or more of its rated capacity, after restoring the AC power supply, the charging device should be started manually or automatically immediately, and the battery group should be recharged according to the normal charging method prescribed by the manufacturer. Or charge the battery pack according to constant current limit voltage charging constant voltage charging floating charging mode.

When the short-term interruption of AC power supply makes the discharge capacity of German sunlight battery exceed its rated capacity, it is not necessary to recharge the battery pack. Especially, it is not suitable to use the automatic charging device to recharge the battery pack according to the mode of constant current and voltage limiting charging-constant voltage charging-floating charging. Prevent DC busbar voltage from damaging two times and affect battery performance. Therefore, in the operation of short-term AC power outage, if there is no need to recharge the battery, the charging device should be directly transferred to floating charging operation.

If the short interruption time of AC power supply is longer and the discharge capacity of German sunlight battery exceeds 20% or more of its rated capacity, the battery pack should be recharged in time after the AC power supply is restored.