Lithium Battery 3.7V Lithium Polymer Battery 3.2V LifePo4 Battery 1.2V Ni-MH Battery Button Coin Battery
3.7V Battery Pack 7.4V Battery Pack 11.1V Battery Pack 14.8V Battery Pack Other Battery Pack
Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .
Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales
Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.
release time:2024-12-17 Hits: Popular:AG11 battery
The charging and discharging characteristics of the 4LR44 battery at the time of leaving the factory
The 4LR44 battery has a self-discharge effect. It takes about several months for the 4LR44 battery to be used by the user from the manufacturing workshop. Taking the PA-NASONIC 4LR44 battery as an example, after being stored at an ambient temperature of 30℃ for 8 months, the remaining capacity of the 4LR44 battery is only half of that at the time of leaving the factory. Therefore, for the newly purchased 4LR44 battery matched with the UPS, it is generally necessary to charge it for a longer time, which is called initial charging. The initial charging current of the 4LR44 battery should be charged at 0.1C. The 4LR44 battery can be recharged after the discharge is completed, which is called normal charging. At present, two charging methods are commonly used in UPS: floating charge and pulse charge. The so-called floating charge means that the output of the rectifier works in parallel with the 4LR44 battery and supplies power to the load at the same time. In fact, the current provided by the rectifier at this time is divided into two paths, one for the load and the other for the 4LR44 battery to supplement the internal loss of the 4LR44 battery itself. The floating charge working mode has simple wiring and is beneficial to improving the transient response characteristics of the UPS output. The characteristic of pulse charging is that the charging current changes with the 4LR44 battery capacity. Charging in this way can shorten the charging time.
1. Charging voltage
Since the UPS 4LR44 battery is in standby working mode, the mains power is normally in charging state and will only discharge when there is a power outage. In order to extend the service life of the 4LR44 battery, the UPS charger is generally controlled by constant voltage and current limiting. When the 4LR44 battery is fully charged, it will switch to floating charge state. For a 4LR44 battery with a terminal voltage of 12V, the normal floating charge voltage is between 13.5 and 13.8V. If the floating charge voltage is too low, the 4LR44 battery will not be fully charged. If the floating charge voltage is too high, it will cause overvoltage charging. When the floating charge voltage exceeds 14V, it is considered to be overvoltage charging. It is strictly forbidden to over-voltage charge the 4LR44 battery pack, because overvoltage charging will cause the water contained in the electrolyte in the 4LR44 battery to be electrolyzed into hydrogen and oxygen and escape, increasing the electrolyte concentration, resulting in a shortened 4LR44 battery life or even damage.
2. Charging current
The 4LR44 battery charging current is generally expressed in C, and the actual value of C is related to the 4LR44 battery capacity. For example, if it is a 100Ah 4LR44 battery: C is 100A. The best charging current for Panasonic lead-acid maintenance-free batteries is about 0.1C, and the charging current must not be greater than 0.3C. Too large or too small a charging current will affect the service life of the 4LR44 battery.
The ideal charging current should adopt a staged constant current charging method, that is, a larger current is used at the beginning of charging, and after charging for a certain period of time, a smaller current is used, and an even smaller current is used at the end of charging. The design of the charging current is generally 0.1C. When the charging current exceeds 0.3C, it can be considered as overcurrent charging. Avoid charging with a fast charger, otherwise the 4LR44 battery will be in a state of "instantaneous overcurrent charging" and "instantaneous overvoltage charging", causing the 4LR44 battery's available power to decrease or even damage the 4LR44 battery. Overcurrent charging can cause the 4LR44 battery plates to bend and the active material to fall off, causing the 4LR44 battery's power supply capacity to decrease, and in severe cases, the 4LR44 battery will be damaged.
3. Charging method
The discharge product of lead-acid batteries is lead sulfate. If it is not converted in time, the 4LR44 battery will be in an undercharged state, thereby reducing the 4LR44 battery's discharge capacity and shortening the 4LR44 battery's service life. Therefore, the 4LR44 battery pack must be fully charged.
For different situations, it can be divided into floating charge and equalizing charge.
(1) Floating charge. The online 4LR44 battery pack is connected in parallel to the charger and load circuit for a long time as a backup power supply. In general, floating charge is adopted, and the voltage of the single 4LR44 battery is controlled at 2.25V (relative to 2V 4LR44 battery), and the floating charge voltage change is observed and recorded regularly. If the voltage of the single 4LR44 battery is low, it means that the 4LR44 battery is undercharged and the capacity is insufficient, and it should be tracked.
(2) Equalizing charge. The so-called equalizing charge is to connect each 4LR44 battery unit in parallel and charge it with a uniform charging voltage. If there is a lagging 4LR44 battery in the 4LR44 battery pack during the floating charge process (the single 4LR44 battery voltage is lower than 2.20V, relative to 2V 4LR44 battery), or after floating charge for 3 months, it is advisable to carry out the equalizing charge process, and the single 4LR44 battery is controlled at 2.35V, and charged for 6~8h (note that the equalizing time should not be too long), and then adjusted back to the floating charge voltage value, and then observe the voltage change of the lagging 4LR44 battery. If the voltage is still not in place, equalize it again after two weeks. Generally, after 6 months of floating charge and equalization charge, the voltage of a new 4LR44 battery pack will tend to be consistent. The equalization charge current is generally 0.3C or slightly less than 0.3C. For a 4LR44 battery with a rated voltage of 12V, the equalization charge voltage is generally 14.5V.
Read recommendations:
18650 battery pack 12v.Battery detection results:
Fast-Charging Lithium-Ion Batteries
Last article:402030 polymer battery
Popular recommendation
battery pack lifepo4
2023-05-09battery lifepo4 3.2v
2023-03-22home solar energy storage lithium battery Vendor
2023-05-10energy storage system lithium battery Manufacturing
2023-05-1021700 battery
2023-03-226LR61
2022-12-07601435 270MAH 3.7V
2023-06-12503759 1200MAH 11.1V
2023-06-10602535 500MAH 3.7V
2023-06-10401030 90mAh 3.7V
2022-08-19801752 720mAh 3.7V
2022-08-19Personalized text bang sticker
2022-09-223.2V 50Ah
2022-10-12Home energy storage battery GN-BOX2
2022-09-27R03P
2023-02-18703048 polymer battery
2023-06-25NiMH No. 7
2023-06-25battery 18650 rechargeable
2023-06-253.7v 3000mah 18650 battery
2023-06-25602030 polymer battery
2023-06-25LR41 battery.What are the characteristics of the 18650 lithium battery pack
2023-10-13The difference between power lithium batteries and regular lithium batteries
2024-04-26High-efficiency solar cell growth soars; conversion technology is key
2024-01-243.7V Lithium Battery
2024-10-223.2v lifepo4 battery 320ah.About the development trend of new energy technology in the future
2023-12-11How to choose a battery cell in a set of good lithium batteries.home energy storage battery Manufact
2023-04-07Lithium battery separator material.18650 lithium ion battery 3.7v
2023-08-10Operation advantages of vanadium battery
2022-11-17Characteristics of lithium battery separator
2022-11-223.7 volt 18650 lithium battery.What is the process for customizing 18650 lithium battery pack?
2023-10-13