Using power supply peak charging
For users who have long been in low-voltage low voltage or frequently-powered power for a long time, in order to prevent the battery from being prematurely damaged by long-term charging, the battery is fully utilized to charge the battery to ensure battery at each discharge. There is a sufficient charging time. When the battery is depressed, it is charged to 90% of the rated capacity of at least 10 to 12 h. Pay attention to the selection of the charger.
The UPS power supply-free seal battery cannot be charged with a controllable silicon-type "fast charger". This is because this charger will cause the battery to be in the harsh charging state of "instantaneous abortion charge" and "instantaneous transient charging. This state will make the battery can be reduced, and the battery will be scrapped in severe cases. When using the UPS power supply of the constant voltage cut-off charging loop, be careful not to adjust the battery voltage too much protection work point, otherwise, it is prone to overflow charging in its initial charging. Of course, it is best to use both constant current, Another constant pressure charger is charged.
Ensure the temperature of the power supply
The capacity of the battery is closely related to the ambient temperature. In general, the performance parameters of the battery are calibrated at room temperature to be 20 ° C, when the temperature is below 20 ° C, the capacity of the electric storage will be reduced, while the temperature is above 20 ° C, it is available The capacity used will increase slightly. Different models of different models are different from the degree of temperature. According to statistics, at -20 ° C, the battery can only reach around 60% of the nominal capacity. The impact of visible temperatures cannot be ignored.
Of course, it is necessary to extend the service life of the battery pack not only pay attention to maintenance, but also consider load characteristics (resistivity, inductance, capacitance) and size when choosing. Do not allow the battery to be over-light operation for a long time, so as to avoid the battery discharge current.
Periodic inspection
Regularly check the end voltage and internal resistance of each unit battery. For a 12V unit battery, if the end voltage between each unit battery is found in the inspection, the unit cell should be balanced to restore the internal resistance of the battery to restore the internal resistance of the battery to restore the internal resistance of the battery by more than 0.4 V or more than 80mΩ or more, the internal resistance of each unit battery exceeds 80mΩ. And eliminate end voltage between each unit cell. When charging is charged, the charge voltage is 13.5 to 13.8.8V. Most battles through a good balanced charging process can return its internal resistance to 30 mΩ or less.
During operation, the UPS power supply is eliminated by the above-mentioned imbalance generated by each unit battery characteristic over time, it is impossible to rely on the charging circuit inside the UPS power supply to be eliminated, so a significantly uneven battery has occurred. In group, if the offline is not taken in time, its unevenness will become more and more serious.
Re-floating charge
The UPS power supply is re-loaded with the battery to float the battery to the battery by the electric circuit of the charging child product in the machine. The UPS power supply is in a floating state without the discharge process, which is equivalent to the state of "storage." If this state has been too long, the battery is not scrapped due to "storage for too long", which is mainly manifested as an increase in battery internal resistance, and the internal resistance can reach several Ω.
It is found that at room temperature 20 ° C, after storage for 1 month, the capacity of the battery is about 97% of its rated value, and if it is not used for 6 months, its use capacity is 80% of the rated capacity. If the storage temperature is increased, its usable capacity will decrease. It is therefore recommended that the user is best to unplug the mains input every 20 ° C, so that the UPS power supply is operated in a state of providing energy from the battery to the inverter. However, this operation should not be too long, and about 30 minutes of the load is about 30% of the rated output, approximately 10 min.
Reduce depth discharge
The service life of electricity is closely related to the depth of it is discharged. The lighter the load of the UPS power supply, the larger the ratio of the electric storage capacity and its rated capacity, and in this case, when the UPS power is too low due to the low battery voltage, the battery is automatically turned off The depth of the discharge is relatively deep.
How does the actual process reduce the battery depth discharge? Method is simple: When the UPS power is in the mainstream disruption, changed from the battery to the inverter, most UPS power supplies will ring around 4s. Periodic alarm sound, notifying the user that it is now available by the battery. When the alarm sound is heard, it will indicate that the power supply is already depth discharge, and the emergency treatment should be carried out immediately, close the UPS power supply. Not forced, generally don't let the UPS power have been working until the battery voltage is too low and the automatic shutdown is over. , Read the full article, original title: 5 methods for lowering the total failure rate of UPS power
Article Source: [Micro Signal: Ofweekgongkong, WeChat public number: OfWeek Industrial Control] Welcome to add attention! Please indicate the source of the article.
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