With the rapid development of lithium-ion use, the use of lithium batteries is further penetrating into the military, aviation and other technical fields. These fields require lithium-ion batteries for low-temperature use in the range of -40 degrees, or even lower. Due to the unique technical advantages, low-temperature lithium-ion batteries are now widely used in the military field, becoming an indispensable source of energy in military combat.
The application of military lithium battery pack covers many military fields such as land (man-portable systems, army combat vehicles, military communication equipment), sea (submarines, underwater robots), air (unmanned reconnaissance aircraft), and sky (satellites, spaceships).
Ultra-low temperature lithium battery pack usually refers to the battery used in a low temperature minus 50 ℃ environment, the current military low-temperature lithium battery is also the minimum to work at such a temperature, but due to the special use of the environment, the military ultra-low temperature lithium battery standard is to adapt to certain conditions.
Military equipment power supply energy density, endurance time, volume and weight are important factors that affect the operational capability of the troops, lithium batteries have high energy density, small size, light weight, long cycle life, small self-discharge rate, no memory effect, good low-temperature performance, reliable use, low maintenance costs, can be quickly charged, high current discharge time and many other advantages, is the first choice for military equipment power supply. Usually, the design of military lithium batteries need to consider the long-term stable use in the outdoor environment. In addition to the need to have a wide temperature characteristics, in the structure of the seal, shock resistance, explosion-proof need to have a special design. Stability and safety are the first factors to be considered.
The production of military special lithium battery pack usually needs to have the following characteristics
1. High reliability: In any conditions need to ensure the stable output of lithium batteries at all times.
2. High adaptability: in different climatic conditions, to ensure that high-intensity electromagnetic, high / low air pressure, high radioactive radiation and high salt and other special environments can be used normally.
3. High safety: In the case of high-intensity shock and blow, the battery can also ensure safety, and will not cause personal injury or death due to the battery itself.
The main features of military low-temperature lithium battery pack are as follows
●Battery body: modularized monoblocks are combined in series and parallel through detachable connections.
●Temperature control module: It can be self-heating function, which needs to meet the normal work of special extreme environment.
●Protection module: It records the battery status and can prompt in abnormal situation or disconnect the working status of the battery.
●SOC calculation module: Accurately display the battery power condition, and it needs to have the function of automatically calibrating the display power to ensure that the battery charge state is accurately displayed.
●Control and communication module: To realize the communication and data transmission within the system.
According to the discharge performance distinction: multiplier type low temperature lithium battery, energy storage type low temperature lithium battery.
A, low temperature multiplier type lithium battery pack is used for infrared laser equipment, strong light type armed police equipment, acoustic armed police equipment.
B, low temperature storage type lithium battery pack is widely used in military tablet PC, paratrooper device, military navigator, UAV backup starter power, special flight instrument power, satellite signal receiving device, marine data monitoring equipment, atmospheric data monitoring equipment, outdoor video identification equipment, oil exploration and testing equipment, railroad line monitoring equipment, power grid outdoor monitoring equipment, military warm shoes, vehicle backup power.
Summary: The application of low temperature lithium battery pack is very wide, but the cost is much higher than that of conventional lithium batteries. So usually, low-temperature lithium battery pack products are mainly used in special fields, military and industrial fields of energy storage power supply system, or some vehicle power supply system. Because of the lithium battery itself technology. Any is a major obstacle to the popularity of wide temperature lithium batteries.
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