How can we use lithium-ion battery solar street lights in low-temperature areas?

1. The choice of battery cell The solar lithium ion battery currently on the market is 18650 battery cell, which is divided into power lithium battery and ordinary battery. Although the entire positive and negative electrode material system and structure are the same, the power lithium ion battery is The positive and negative electrode material particles are smaller than the ordinary type (increasing the surface area and speeding up the chemical reaction rate). The diaphragm material and electrolyte used have better conductivity. In addition, the lugs drawn from the positive and negative electrodes are also more dynamic than the ordinary type. More (reduce the internal resistance of the tab and meet the larger current). In addition, power lithium batteries are more resistant to low temperatures than ordinary ones, and most of the so-called low-temperature batteries on the market are also power lithium batteries. Therefore, if we use batteries in these low-temperature areas in the north, remember to choose power batteries. Second, the choice of shell The shell mentioned here is packaged on the battery pack to protect its safety. There are two types of shells on the market: aluminum shell and plastic. The most popular one is the aluminum shell. Because of the sliding groove on the back, we can directly fix the solar bracket with flat-head screws as long as we drill holes on the bracket. The installation of the plastic shell requires welding a storage room. We generally use iron plates to be bent into a straight U-shaped groove, which is placed on the bracket and the socket. Because the thermal conductivity of aluminum shell is better, we recommend using plastic shell in northern Kazakhstan. Although the cost is a little higher, the heat insulation is good. Third, the choice of insulation layer The choice of adding insulation layer is to let the lithium-ion battery play the role of insulation and heat preservation under the low temperature of winter. We will add a layer of insulation cotton on the outermost part of the lithium-ion battery pack, or directly use a foaming agent. It fills the whole shell, which can also be used for heat preservation. The choice of insulation layer lies with the customer, and there is no mandatory requirement. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What are the differences between dry batteries and hydro batteries? Which is better?