Lithium Battery Knowledge

Battery technology is the biggest threshold for the vigorous promotion and development of electric vehicles, and the battery industry is at a stage where the development of lead-acid batteries and traditional lithium batteries is at a bottleneck. The battery industry and even the electric vehicle industry have brought new changes. So which is better, graphene battery or lithium-ion battery? What is the difference between graphene batteries and lithium batteries?

Lithium-ion batteries have the advantages of light weight, large capacity, and no memory effect, so they are widely used. Many digital devices use lithium-ion batteries as power sources, although their prices are relatively expensive. Lithium-ion batteries have high energy density, their capacity is 1.5 to 2 times that of nickel-metal hydride batteries of the same weight, and they have a very low self-discharge rate. In addition, lithium-ion batteries have almost no "memory effect" and the advantages of no toxic substances are also important reasons for their wide application. There are also many types of lithium batteries. This article compares the two types of lithium batteries: 18650 lithium battery and 26650 lithium battery.

There are two main types of rechargeable batteries on the market: nickel-metal hydride batteries and lithium-ion batteries, and the problem that people are concerned about whether the batteries cannot be charged is mostly for these two types. Batteries of the same type and specification can be connected in parallel, in series and in combination to form assembled batteries with different numbers of cells. As a common phenomenon, people want to understand the reasons behind the failure of batteries and battery packs to charge and seek solutions.

Nickel-metal hydride batteries and lithium-ion batteries are widely used in the market. They are non-polluting and environmentally friendly batteries and are important areas for new energy development. So which is better, Ni-MH battery or Li-ion battery?

In order to effectively improve the storage capacity of lithium batteries, people generally adopt the method of increasing the battery capacity to achieve the purpose. However, limited by the nature of the raw materials used, the increase in capacity is always limited, so increasing the voltage value has become another way to improve the power storage capacity of lithium batteries. As we all know, the nominal voltage of lithium battery is 3.6V or 3.7V, and the maximum voltage is 4.2V. So, why can't the voltage of lithium batteries get a bigger breakthrough? In the final analysis, this is also determined by the material and structural properties of lithium batteries.

The performance test of lithium battery mainly includes voltage, internal resistance, capacity, internal pressure, self-discharge rate, cycle life, sealing performance, safety performance, storage performance, appearance, etc. Others include overcharge, overdischarge, weldability, corrosion resistance sex, etc

At present, China's vehicle power lithium battery technology route chooses the same lithium iron phosphate route as the United States. There is no doubt that lithium iron phosphate batteries have many advantages: high stability and relatively cheap price, but their energy density (higher energy density can better solve the problem of battery life) has very limited room for improvement.

Prices of some of the raw materials used to make lithium-ion batteries for electric vehicles continue to soar, the latest data shows. Lithium carbonate rose by 14,000 yuan/ton today, and the latest quotation was 380,000 yuan/ton; lithium hydroxide rose by 10,500 yuan to 11,500 yuan per ton, and lithium iron phosphate, the cathode material, rose by 7,500 yuan per ton.

Many users who use laptops will have a question, "Does the laptop need to be plugged in all the time?". This article focuses on this question and talks about my own views.

With the transformation of automobile electrification, consumers' acceptance of pure electric vehicles has gradually increased, and pure electric vehicles on the market have become more and more popular, but at the same time, the shortcomings of pure electric vehicles have also been exposed.