The advantages and disadvantages of lithium batteries

Advantages:

Energy ratio is high. With high storage energy density, it has reached 460-600Wh/kg, which is about 6-7 times of lead-acid battery.

The service life is long, the service life can reach more than 6 years, and the battery with lithium iron phosphate as the positive electrode is charged and discharged with 1CDOD, and the record can be used 10,000 times;

High rated voltage (single working voltage is 3.7V or 3.2V), which is equal to the series voltage of 3 nickel-cadmium or nickel-hydrogen rechargeable batteries, which is convenient for forming battery power packs;

With high power bearing capacity, lithium-iron phosphate lithium-ion battery for electric vehicles can achieve 15-30C charge and discharge capacity, which is convenient for high-intensity start-up acceleration;

The self-discharge rate is very low, which is one of the most outstanding advantages of the battery. Currently, it can generally be 1%/month or less, less than 1/20 of the nickel-hydrogen battery;

Lightweight, the weight in the same volume is about 1/5-6 of the lead acid product

High temperature and low adaptability, can be used in the environment of -20 ° C - 60 ° C, after the process treatment, can be used in -45 ° C environment;

Green, no matter whether it produced, used or scrapped; it does not contain any toxic and harmful heavy metal elements and substances such as lead, mercury and cadmium.

Production does not consume water, which is very beneficial for China that lacks water.

Lithium battery advantages

Lithium-ion battery (Li-ion, lithium ion battery): Lithium-ion batteries are widely used because of their lightweight, large capacity, and no memory effect. Many digital devices now use lithium-ion batteries as power supplies, even though they the price is relatively expensive. Lithium-ion batteries have a high energy density, and their capacity is 1.5 to 2 times that of nickel-hydrogen batteries of the same weight, and has a very low self-discharge rate. In addition, the lithium-ion battery has almost no "memory effect" and does not contain toxic substances, which is also an important reason for its wide application.

In addition, please note that the outside of the lithium battery is generally marked with English 7.2Vlithiumionbattery (lithium battery) or 7.2Vlithiumsecondarybattery (lithium secondary battery), 7.2Vlithiumionrechargeablebattery (rechargeable lithium battery), so users must see the appearance of the battery block when purchasing the battery. Prevent cadmium nickel and nickel hydride batteries from being mistaken for lithium batteries because they do not see the type of battery.

The no-memory effect greatly facilitates the user of the mobile phone. The user does not have to discharge and recharge every time he charges, and can charge the mobile phone at any time as desired.

Lithium battery

The disadvantage of lithium batteries is that they are expensive, so they not widely used now, and mainly used in handheld computers, like PDAs, communication devices, cameras,specials,specials,speciales, instruments, and so on. With the development of technology, process improvement and increased production, the price of lithium batteries will continue to decline, and the application will be more common.

Good safety performance ※ the polymer lithium battery is made of aluminum plastic flexible packaging, which is different from the metal casing of the liquid battery. Once the safety hazard occurs, the liquid battery is easy to explode, and the polymer battery can only be air drum.

The thickness is small and can made thinner. ※ Ordinary liquid lithium battery adopts the method of customizing the outer casing first, and then plugging the positive and negative materials. The thickness is 3.6mm or less, there is a technical bottleneck, and the polymer battery core does not have this problem. The thickness can be it can be less than 1mm, which is in line with the current demand for mobile phones.

Lightweight ※ the weight of the polymer battery is 40% lighter than the steel shell lithium battery of the same capacity specification, which is 20% lighter than the aluminum battery.

Large capacity ※Polymer battery is 10-15% higher than the same size steel shell battery, 5-10% higher than aluminum shell battery, becoming the first choice for color screen mobile phone and MMS mobile phone. Now the new color screen and MMS mobile phone on the market Polymer cells are also mostly used.

The internal resistance is small ※ the internal resistance of the polymer battery is smaller than that of the general liquid battery. At present, the internal resistance of the domestic polymer battery can even be less than 35mΩ, which greatly reduces the self-consumption of the battery and prolongs the standby time of the mobile phone. It can fully reach the level of international standards. A polymer lithium battery that supports large discharge currents is an ideal choice for remote control models and is the most promising alternative to nickel-metal hydride batteries.

Shape can be customized ※ Polymer battery can increase or decrease the thickness of the battery according to customer's needs, develop new battery model, cheap price, short mold opening period, and some can even customized according to the shape of mobile phone to make full use of battery casing Space, increase battery capacity.

Good discharge characteristics ※ Polymer batteries use colloidal electrolytes, which have stable discharge characteristics and a higher discharge platform than liquid electrolytes.

The design of the protection board is simple ※Because of the polymer material, the battery core cannot ignite or explode, and the battery core itself has sufficient safety. Therefore, the protection circuit design of the polymer battery can consider omitting the PTC and the fuse, thereby saving the battery cost.

The lithium battery has high voltage and lightweight. The average voltage of a single cell can reach 3.7V or 3.2V. It is equivalent to the series voltage of 2-4 nickel-hydrogen batteries or nickel separator cells. If the customer requires the voltage of the battery to pass, then the lithium battery is also convenient to form a lithium battery pack, which is convenient and quick to increase the voltage of the lithium battery.

The energy and density of lithium batteries are also high for other batteries. Lithium batteries have high-energy storage density. Currently, the density of lithium batteries can reach 450-620Wh/kg, which is 5-7 times that of lead-acid batteries. If people choose batteries, they will also consider a very important issue, that is, pollution.

Compare against battery weight. A lithium battery weighs about 5-6 times the weight of a lead-acid battery. Although the weight of the lithium battery is not much different from the weight of the polymer lithium battery. However, looking at capacity and longevity, people will choose lithium batteries.

Lithium batteries have a long service life, and a lithium battery can last for more than 6 years without accidents for up to 9 years. The normal number of uses is more than 1000 times. If the number of accidental uses does not occur, it can reach 1500 times or more.

Self-discharge is low and there is no memory effect. Production of a lithium battery to lithium battery body with a protective plate can make the lithium battery have an overcharge and over discharge effect. The lithium battery itself has high power carrying capacity, and it selected by the electric vehicle can achieve a high effect capacity of 15-30C charge and discharge, to accelerate the high-intensity start of the vehicle.

Lithium batteries are environmentally friendly, and it does not contain lead, mercury or cadmium.

The page contains the contents of the machine translation.