Reasons and solutions for bubbles and solutions for base station colloidal battery

　　Author ：Iflowpower – Portable Power Station Supplier

In recent years, with the expansion of user communication and the improvement of service levels, mobile communication networks quickly extend towards the countryside. In many outdoor marginal base stations, a large number of colloidal batteries began to use colloidal batteries as a basic guarantee. Since the type base station is completely exposed to the wild, it is found in maintenance practice.

In the high temperature environment in the South, the colloidal battery will have a housing bulging, which has a greater impact on the life of the battery and the reliability of communication power supply. Causes of colloidal battery bulge analysis of colloidal cells are solidified in a gel coagulation between the polar groups, the negative electrode plate, and the separator, and the electrolyte is not flowing, and the recycle is high in high temperature environments, high charging efficiency, Long service life, etc., and also have significant advantages in energy saving, reducing pollution.

In the maintenance practice, the colloidal battery was very serious after the installation of about half a year: the sidewalls and shell cover of the battery have varying degrees of bulging; the safety valve is very obvious, the battery cover surface The distribution of acid liquid traces is basically "sprayed" in a safe valve; battery leakage causes battery row bodies to be rusted; safety valve cracked. From maintenance records and on-site conditions, the reason for this phenomenon has the following aspects: First, the safety valve is not smooth. The safety valve has the purpose of adjusting the internal air pressure of the battery, and it should be able to release internal gas in time.

The colloidal battery is in the initial use of the electrolyte in the battery compares the "rich", and the gas precipitation during the charging process is large. If the problem of the safety valve makes the exhaust, when the amount of gas precipitation in the charging process is large to some extent, the housing is blocked due to "flatulence", and even the safety valve cracked. Second, the battery management program chip parameter design of the switching power supply system does not match the use characteristics of the colloidal battery.

By comparing the bulk battery site switching power parameter setting and the unbelled battery station switching power supply parameter setting, the switching power supply manufacturer of the battery bulge site is found to make the battery full of energy (ie, after charging is completed, use small current. Continue to charge the battery). When the battery is charged down to 10 mA / AH conversion conditions, all charge can not be converted to the floating program, and the flow rate is also possible (the current is possible in the high temperature environment).

The rebound increased, the time of the continued flow rate is generally 4 ~ 10 hours). In addition, the power supply of the outdoor base station is poor, and the power failure is frequent. It is bound to cause the switching power supply to charge the battery, and also accelerate the corrosion rate of the battery electrode and the downtime of the battery.

The temperature is extremely high in the battery. Third, the temperature sensing line of the colloidal battery warehouse is not accessed, and the system cannot achieve the conversion from all-on-floating charge when the temperature reaches 40 ¡ã C. In high temperature environments, the temperature compensation function is actually increasing the total floating voltage of the battery pack, which directly leads to the final charging current of the battery that the charging current will increase, and the internal analysis of the battery is continuously affected.

Gas and fever, thereby adding electrolysis of colloidal electrolyte water, causing battery drums. Fourth, the battery ventilation condition is poor. The design of the battery cabinet is due to the full consideration of anti-theft safety, resulting in poor ventilation and natural heat dissipation ability, and the temperature of the battery pack occurs in time during the charging process, which also affects the battery of the battery.

The solution to the bulk battery bulge is based on the above analysis. In the maintenance work, summarize solutions to colloidal batteries. On the one hand, according to the characteristics of the colloidal battery, the battery charging management software of the switching power supply is changed as follows: 1.

In order to shorten the time to charge, prevent overcharged battery drum, reset all floating conversion conditions, set the original set current Value 10mA / AH as a basic conversion condition is changed to automatically convert to floating operation when the current value drops to 20 mA / AH. Second, connect the temperature sensor of the switching power supply to the battery cabinet, so that the floating charge of the switching power supply can be adjusted with the ambient temperature. New overwhelming protection.

Third, in order to prevent the battery excess charge, shorten all charge protection time, change the all-charge protection time from 18 hours (all the setting of the protection time is to prevent battery thermal out of control, when all charging flow cannot be reduced to the setting When the floating conversion current value, the system is enforced to floating in accordance with time during time. Fourth, extend the on-time basis, prevent overall frequency of large currents. Change to 180 days by creating the original setting value of 100 days in time.

5. Cancel the freewheeling function of the switching power supply to prevent the battery caused by overcharge. Through the modification of the battery charging parameters, it is important to prevent the switching power supply to charge the colloidal battery in the case of sufficient electricity of the battery.

On the other hand, in order to prevent the quality of the safety valve, the exhaust gas is not smooth, you should pay attention to the inspection of the safety valve in the daily inspection, while requiring battery manufacturers to further improve the quality inspection and manufacturing process of the safety valve to ensure the safety valve After reaching the valve, you can open the valve and exhaust. Through the above treatment, after a period of observation, the colloidal battery does not appear in the housing bulge, and the operation is in normal state. In summary, in the southern high temperature environment, according to the characteristics of the colloidal battery, in the case of ensuring that the battery is fully charged, the floating threshold current value and all charge protection time are prevented, preventing the battery over the colloid Battery housing is onhibiting problems, while doing a good job of overtemperature protection and strengthening the inspection of the safety valve, finding the problem to remember to improve the efficiency of the colloidal battery and life.

In this way, the strength of the colloidal battery has the advantage of reducing lead and acid contamination environment.