Power battery manufacturer Dery Energy talks about the characteristics of power lithium batteries

Today, the power battery manufacturer Dery Energy talks about the characteristics of power lithium batteries

Power battery is a new type of high-energy battery successfully developed in the 20th century. The negative electrode of this battery is made of graphite and other materials, and the positive electrode is made of lithium iron phosphate, lithium cobaltate, lithium titanate, etc. It was put into practical use in the 1970s. Due to its high energy, high battery voltage, wide operating temperature range, and long storage life, it has been widely used in military and civilian small appliances.

high pressure

It is three times that of nickel-cadmium batteries and nickel-hydrogen batteries, and nearly twice that of lead-acid batteries, which is also an important reason for the high specific energy of power batteries. Therefore, when forming a power battery pack of the same voltage, the number of power batteries connected in series will be much less than that of lead-acid batteries and nickel-metal hydride batteries. If the number of single cells in the power battery is larger, the consistency requirements of the single cells in the battery pack will be higher, and the lifespan will be more difficult to achieve. Problems with two cells can cause problems with the entire battery, so it's not hard to see why a 48V lead-acid battery has a higher response than a 36V lead-acid battery. From this point of view, lithium batteries are more suitable for the use of power batteries. For example, a 36V lithium battery only needs 10 cells, while a 36V lead-acid battery needs 18 cells, that is, 3 12V battery packs, and each 12V lead-acid battery has 6 cells, which is 6 Cell works.

light weight

Power lithium battery manufacturers tell you that the specific energy is as high as 150Wh/Kg, which is 2 times that of nickel-metal hydride batteries and 4 times that of lead-acid batteries, so the weight is one-third to one-quarter of lead-acid batteries with the same energy. From this point of view, lithium batteries consume less resources, and due to the relatively large reserves of elements used in lithium manganate batteries, the prices of lead-acid and nickel-metal hydride batteries may further increase, and the cost of power batteries will also decrease. will be further reduced. The weight of the electric bicycle battery is 2.2-4 kg, the weight of the lead-acid battery is 12-20 kg, and the weight of the lithium battery is about one-quarter to one-third of the lead-acid battery 10Ah battery) is 10 kg lighter, the battery weight is reduced by 70%, and the vehicle weight is reduced by at least 20%. In addition, ordinary lithium-ion bicycles are simple electric bicycles, because the battery and the whole vehicle are very light, and the battery life of the same voltage and capacity is longer. The weight of ordinary electric bicycles is more than 40 kilograms, and the weight of electric bicycles with power batteries Weight is 7 to 26 kg.

longevity

The number of cycles can reach 1000~3000 times. If the capacity is kept at 70%, the 100% charge-discharge cycle of the battery pack can reach more than 200 times, and the service life can reach 5~8 years, and the service life is about 2~3 times that of the battery pack. Lead-acid batteries. With the innovation of technology and the improvement of equipment, the battery life will be longer and longer, and the cost performance will be higher and higher. The self-discharge rate is low, less than 5% per month.

massive

Good low temperature performance, power battery can run between -40 ℃ ~ +55 ℃, and water-based batteries (such as gallic acid battery, nickel-metal hydride battery) at low temperature, the performance of the electrolyte will be due to the poor fluidity of the electrolyte.

no memory

Therefore, there is no need to discharge before every charge like Ni-Cd and Ni-MH batteries, and can be charged anytime, anywhere. The depth of charge and discharge of the battery has little effect on the life of the battery. It can be fully charged and fully discharged. Our cycling tests are full charge and full discharge.

In addition to the high battery voltage, the maintenance board of the power lithium battery pack can monitor each single cell with high precision, intelligently manage low power consumption, and improve the functions of overcharge, overdischarge, temperature, overcurrent, short circuit maintenance, and lock self-recovery. And the reliable equalizing charging function greatly prolongs the life of the battery. However, other types of batteries (such as square lead-acid batteries) are in use, due to battery consistency, charger and other issues (due to cost and other reasons, lead-acid battery packs cannot be monitored and maintained per s single cell).

The above are the characteristics of power lithium battery manufacturers talking about power batteries, hoping to help everyone.