What are the factors that affect the uneven float voltage of the battery?
What are the factors that affect the uneven float voltage of the battery?
During the long-term operation of the battery, the main reasons for the large floating charge pressure difference are as follows:
1. Frequent power outages
Currently, the battery charging is not enough. With the gradual miniaturization of telecommunications networks, battery charging has shifted from the original density to decentralization. Many locations are located in the suburbs and remote villages, blocking the city. Because this kind of regional power supply system is not very normal, it is a very busy season, and the frequency of failures often occurs. Usually, there are 24 power outages a week, ranging from 1 hour to 24 hours, or even several days. Frequent power failure is a small current shallow charge-discharge cycle system, sometimes a small current deep charge-discharge cycle system, or even an overcharge-discharge system. Rechargeable batteries usually do not charge and discharge immediately after charging and discharging, but start to charge and discharge. Therefore, in such an application standard, part of the active material of the rechargeable battery will fail. Now the rechargeable battery is out of date, causing a floating charge pressure difference.
2. Ambient temperature hazards
At this stage, most of the rechargeable batteries in the access network are installed in self-built rooms. Generally, the rooms do not have central air-conditioning, and only hot air fans are used for ventilation. The natural environment standard is dry weather and poor temperature. In hot and dry summer, the rechargeable battery is in a serious state, the rechargeable battery lacks water, the rechargeable battery is low, and the composite efficiency is high. There will be a pressure difference in the operating voltage of the rechargeable battery.
3. In the case of floating charge, the floating charge voltage is less than that of the battery. At present, the main reason for the battery is: the battery short-circuit fault caused by the internal micro-short circuit fault, mainly including the lead slag short-circuit fault, the baffle double short-circuit fault and the baffle short-circuit fault. This situation can be determined by measuring the open circuit voltage after the lead of the rechargeable battery is left for 30 minutes. Lithium battery electrolyte has high residual components, especially Fe, Mn and organic compound Cl positive ions will cause insufficient battery power, leading to poor battery status. The negative potassium thiocyanate causes the battery to fail. When the rechargeable battery cannot be charged and discharged for a long time after being deeply charged and discharged, the rechargeable battery is prone to produce potassium thiocyanate. Qualitative analysis of potassium thiocyanate to determine whether rechargeable batteries are present. Failure of the rechargeable battery level causes a backup state. The main reason for the failure of the positive level is that the abnormal circulatory system method causes the positive level to fail, and the volume attenuation coefficient is large, which leads to lag.
4. Mixed use of different types of rechargeable batteries
Different types of batteries refer to the same manufacturer series but different capacities or the same capacity but different manufacturers. However, When mixing, due to the different main parameters of the design scheme, the difference in battery charge and discharge levels will lead to differences in charge and discharge levels, differences in acid-liquid comparison, differences in composite high efficiency, and differences in operating pressure of on-off valves. The mutual use of rechargeable batteries of different sizes will cause overcharge loss and undercharge of the battery. The main disadvantage of the new and old rechargeable batteries is that the acid-liquid ratio of the rechargeable batteries is different. The acid-liquid ratio of the new rechargeable battery is relatively large, and the working voltage of the new rechargeable battery is higher when it floats, but the application will remain balanced after a period of time.
5. The float voltage of the battery charging device is set according to the single (20c) float voltage
The total working voltage of the 48v series lithium battery pack is. In the field safety inspection, it was found that the setting of the floating working voltage of the mechanical equipment is not very uniform. Most of the setting is in the middle, which is suitable for summer use, but the winter is low, which can easily cause insufficient battery charging.
6. The uniformity of the working voltage of the floating-charge battery during the manufacturing process is related to the uniformity of the process and raw materials. The unevenness of each process or raw material is finally concentrated together, which is reflected in the unevenness of flotation. Therefore, production process management is an important factor in dealing with differential pressure.
7. The regulation of battery charging is effective, and the regulation of battery charging can alleviate the problem of uneven working voltage. It is best to do it once a year.
