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Military ultra-low temperature lithium battery standard
1. One of the primary requirements for military low-temperature batteries is that the larger the capacity and the lighter the weight, the better;
At present, there are various types of low-temperature batteries, each with its own advantages and disadvantages. Only polymer lithium batteries, lithium iron phosphate batteries, and ternary lithium cobalt oxide batteries can meet the demand. Among these three types of 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.
At present, the performance of Grep low-temperature lithium batteries on the market is roughly as follows:
Charging temperature: 0 ℃~45 ℃
Discharge temperature: -40 ℃~60 ℃
-40 ℃ 0.2C discharge capacity ≥ 80%
-30 ℃ 0.2C discharge capacity ≥ 90%
-40 ℃ 0.5C discharge capacity ≥ 70%
Outstanding low-temperature cycling performance, capable of achieving 300 cycles of 0.2C charging and discharging power, with a capacity maintenance rate exceeding 85%
Low temperature high rate battery
Charging temperature: 0 ℃~45 ℃
Discharge temperature: -40 ℃~60 ℃
-Discharge capacity is 40 ℃ 3C ≥ 75%
-Discharge capacity at 40 ℃ 1C ≥ 85%
Military equipment attaches great importance to weight factors, especially electronic products used in individual combat. The weight of the power supply will directly affect the efficiency and safety of soldiers in carrying out tasks. The effective discharge capacity of low-temperature batteries is directly related to the durability of electronic products and also affects the total time width for soldiers to issue task permits.
2. The standard for using ultra-low temperature lithium batteries in the military should comply with certain safety regulations.
Whether it is for civilian, military or special field equipment applications, the safety of batteries is a key factor that needs to be considered, but different application areas or uses have different requirements and standards for the safety of batteries. The safety level requirements for military low-temperature lithium batteries are relatively high. One of the main reasons is that the battery should pass the shooting test and should not explode or burn. Other conditions are that during high-intensity impact and impact processes, the battery should ensure safety and not cause personal accidents.
3. At a certain temperature, military low-temperature battery standards should meet certain charging requirements:
Low temperature has a significant impact on battery efficiency, so completing battery charging in a low-temperature environment is a difficult technology. At present, Grepp battery technology can achieve this - fast charging at 20 ℃, and normal charging at 30 ℃. Military low-temperature lithium batteries are generally charged indoors in the wild, and the ambient temperature is usually around - therefore, military low-temperature batteries must meet this basic condition at around 20 ℃. In special circumstances, outdoor charging should meet the requirement of being rechargeable at around -40 degrees Celsius.
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