What are the reasons for the swelling of colloidal batteries?

The main reasons for this phenomenon are as follows: First, the safety valve is not exhausted smoothly. The safety valve has the purpose of adjusting the internal air pressure of the battery, and should be able to release the internal gas in time under normal circumstances. In the initial stage of use of a gel battery, since the electrolyte inside the battery is relatively rich, a large amount of gas is precipitated during the charging process. If there is a problem with the safety valve and the exhaust is not smooth, when the amount of gas released during the battery charging process is large to a certain extent, the housing will swell due to flatulence, and even the safety valve port may crack. 2. The battery management program chip parameter design of the switching power supply system is inconsistent with the use characteristics of the gel battery. By comparing the switching power supply parameter settings of the bulging battery site and the switching power supply parameter setting of the non-blowing battery site, it is found that the switching power supply manufacturer at the bulging battery site has designed a continuous current equalization function in order to fully charge the battery (that is, use low current after charging Continue to charge the battery). When the equalizing current of the battery drops to the conversion condition of 10mA/Ah, the equalizing charge fails to switch to the floating charge program, and freewheeling equalization is required (the current of equalizing during the freewheeling phase in a high temperature environment may still be The rebound rises, and the freewheeling equalization time is generally 4 to 10 hours). In addition, the outdoor base station has poor power supply conditions and frequent power outages, which will inevitably cause the switching power supply to overcharge the battery every time it is charged. It also accelerates the corrosion rate of the battery electrodes and the battery's loss of water. The extremely high temperature inside the battery causes the battery shell to swell. 3. The temperature sensing line of the colloidal battery compartment is not connected, causing the system to fail to switch from equal charge to floating charge when the temperature reaches 40°C. In a high temperature environment, the failure of the temperature compensation function actually increases the total float voltage of the battery pack, which directly causes the final charging current of the battery to not be reduced, but it will increase the charging current by multiples and continue to affect the internal analysis of the battery. Gas and heat, thereby intensifying the electrolysis of the colloidal electrolyte water, causing the battery to swell. Fourth, the battery has poor ventilation conditions. The design of the battery cabinet fully considers the anti-theft safety, resulting in poor ventilation and natural heat dissipation capacity of the battery pack, and the temperature of the battery pack during the charging process cannot be diffused in time, which also has a certain impact on the swelling of the battery shell. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the characteristics of mobile phone batteries?