1. One of the prerequisites for military low-temperature batteries is that the larger the capacity and the lighter the weight, the better;
There are many kinds of low-temperature batteries at present, and each low-temperature battery has various advantages and disadvantages. The only batteries that can meet the requirements are polymer lithium batteries, lithium iron phosphate batteries, and ternary lithium cobalt oxide batteries. . Among the three low-temperature lithium batteries, polymer lithium batteries have the highest energy density and lightest weight, followed by ternary lithium cobalt oxide batteries, and finally lithium iron phosphate batteries.
The main performance of low-temperature batteries in today's sales market is rough as follows:
Charging temperature: 0℃~45℃.
Discharge temperature: -40℃~+60℃.
-40℃ discharge capacity ≥80%
-30℃ discharge capacity ≥90%
-40℃ discharge capacity ≥70%
Possesses high-quality low-temperature cycling characteristics, which can complete the electric cycle for 300 weeks and the capacity retention rate is over 85%
Weight is a key element in military equipment, especially in individual combat. The light load of the power supply will directly affect the efficiency and safety of soldiers performing tasks. The reasonable discharge capacity of low-temperature batteries directly affects the endurance of electronic equipment. The difficulty also affects the total time allowed for soldiers to perform tasks.
2. Low-temperature lithium batteries used in the military must meet certain testing standards.
Regardless of the machinery and equipment used in civilian, military or special industries, the safety factor of the battery is a key element that must be considered. Only different uses or application places have different specifications for the safety factor of rechargeable batteries. Military low-temperature lithium batteries have relatively high safety factors. First, rechargeable batteries must undergo gunshot experiments, and the batteries must not explode or ignite. Second, in high-intensity collisions and collisions, the battery must ensure safety and prevent casualties.
3. The specifications for military low-temperature lithium batteries should meet certain charging requirements at a certain temperature:
Because the low-temperature natural environment is very harmful to the battery performance, it is a relatively difficult technology to complete the battery charging of the rechargeable battery in the low-temperature natural environment. The military low-temperature lithium battery is generally charged in the outdoor room, and the working temperature is high. See around -20℃, so military low-temperature batteries must consider this basic standard. Especially when charging in the open air, the battery should be charged at -40 degrees.
4. The standard for military low-temperature batteries should have a certain service life.
The low temperature will seriously harm the work of rechargeable batteries, and the service life of the battery has always been a flaw. The main hazard of low temperature to rechargeable batteries is the problem of lithium analysis. If the relative regulations cannot be met in the production process, the service life of low-temperature rechargeable batteries will be greatly shortened because of the excessively fast lithium extraction rate. Although low-temperature lithium batteries use special raw materials, their service life is still very different compared with lithium batteries at room temperature. Therefore, the service life of military low-temperature lithium batteries is generally one year or longer.
5. Transport safety regulations.
Military low-temperature lithium batteries have regulations on the safety factor of transportation, which are higher than those of general export foreign trade transportation vehicles. Because military batteries are more complicated to transport in the natural environment, the vibration of one object is more complicated than other objects. When exposed to vibrations, the lithium batteries inside the rechargeable battery will not be prone to short-circuit failures or common failures.
