Lithium-ion battery: The star of energy storage batteries

It is called lithium-ion battery because lithium exists in the form of ions in the positive and negative electrodes of the battery as well as in the electrolyte. Compared with other energy storage batteries, it has outstanding advantages such as high energy storage per unit volume, no memory effect, no need to consider the depth of power consumption before charging, high energy conversion rate, low self-discharge rate and long service life.lithium ion battery assembly

Due to the unique technical advantages, lithium-ion batteries are now widely used in the military field, becoming an indispensable source of energy in a military operation.

Military base storage energy. Plateau, border defense, island troops away from the rear base, the energy supply line is long, the development and utilization of wind energy, solar energy and other renewable energy has become an inevitable trend. The use of lithium-ion battery energy storage can not only solve the problem of intermittency and poor stability of renewable energy generation, but also has the function of peak load and basin filling.battery cell machine It is a key technology to realize the energy security of remote military bases. However, this lithium-ion battery is not safe for large-scale energy storage applications. It is prone to smoke, fire and even explosion in case of fire.

Field power supply. The square-cabin energy storage system using lithium-ion batteries does not have the problems of diesel generator noise and obvious infrared characteristics, which significantly enhances the covertness and survivability of electrical energy security. However, for the field power supply environment, lithium-ion batteries have poor low-temperature performance and other problems, such as -40 ℃ conditions, the battery charging and discharging capacity is less than half of the room temperature conditions.

High-energy weapon power supply.prismatic cell assembly Electromagnetic artillery, lasers, high-power microwave and other new high-energy weaponry is more and more widely used, and the output power of directed energy weapons is getting bigger and bigger. This lithium-ion battery can be charged and discharged at a very high rate, and can be used as a power source for high-energy weapons. However, with the trend of miniaturization of high-energy weapons, the volumetric power density of existing lithium-ion batteries still needs to be further improved to meet the requirements of miniaturization and lightweighting of vehicle and airborne weapons.

Unmanned equipment power source. At present, mainstream small and miniature unmanned equipment are using lithium-ion batteries as their main power source. However, the endurance time of UAVs powered by lithium-ion batteries is usually around half an hour, which is the biggest problem that restricts the application of military unmanned equipment in combat.

Warfighter power source. With the acceleration of the trend of informationization, visualization, and intelligence of the single soldier equipment, the demand for electric energy is increasing rapidly. Lithium-ion power battery is the main power source of the current world's man-portable equipment. However, with the increasing degree of informatization of single soldier and squad combat, soldiers have to carry more batteries in the course of carrying out missions. The current high energy density power source is the bottleneck technology that restricts the continuous combat of future soldiers.

Therefore, future lithium-ion battery research will focus on the following areas.

One is high energy density. With the continuous improvement of energy density, the battery contains more energy under the same volume or weight, which can comprehensively improve the range and endurance of drones, underwater vehicles and single-soldier equipment. Second, high safety. Through the use of solid electrolyte instead of the traditional flammable organic electrolyte, lithium-ion batteries have a higher level of safety, and will not cause a secondary explosion after being hit by artillery fire, which meets the requirements of large military bases and energy storage pods for large-capacity, high-security energy storage. Third, high environmental adaptability. Improve the diffusion ability of lithium ions in the electrode material and the conductivity of the electrolyte at low temperatures, so that the battery can be charged and discharged normally under cold conditions, thus effectively enhancing the global combat capability of field power stations and weaponry. The fourth is high power density. Through relevant research, the rapid charging and discharging performance of lithium-ion batteries has been continuously improved, so as to meet the pulse power demand for instantaneous energy release of new weapons.

Energy is the material foundation and power source of modern warfare, and lithium-ion batteries play a very important role from large military bases to individual teams, and from aviation spacecraft to underwater equipment. With the breakthrough of key technologies, lithium-ion batteries will have a wider application prospect in the military field.