Analysis and comparison of the advantages and disadvantages of the four power batteries

Samsung SDI company, everyone can be a little strange, but in the sale of new energy vehicles use SDI company battery is not in the minority. The Roewe e950 and Dongfeng automobile parts of new energy vehicles, the Samsung SDI the ternary lithium ion batteries. In addition, Samsung SDI for BMW i3 and i8 plug-in hybrid sports car, the Volkswagen passat GTE and audi other battery electric supply.

Samsung Note7 recently half an year is even the stewardess thunder to account for.When boarding the announcer will bother to inform passengers: please bring Samsung Note7 passengers, the phone will be sent to fly again after staff at!In August this year, Samsung launched its annual flagship phone - Samsung Note7, frequent battery explosion spontaneous combustion in the whole world, eventually had to halt to the sale of all global recall.Samsung Note7 used batteries, is produced by Samsung SDI company ternary lithium batteries, said the Samsung battery, because Samsung mobile phone batteries could cause the crisis has spread to the automobile industry.

Samsung SDI company, everyone can be a little strange, but in the sale of new energy vehicles use SDI company battery is not in the minority.The roewe e950 and dongfeng automobile parts of new energy vehicles, the Samsung SDI also three yuan lithium ion batteries.In addition, Samsung SDI for BMW i3 and i8 plug-in hybrid sports car, the Volkswagen passat GTE and audi other battery electric supply.In addition, Samsung battery crisis, led to the Jianghuai iEV6S temporarily shut down.

The first killer of new energy vehicles, battery explosion

How can speak of pure electric vehicles, not to mention the tesla!On November 4, this year in Indianapolis, a ModelS under the high speed impact as a tree, causing vehicles on fire, two passengers were killed in the car.This is the fourth fire accident nate tesla this year.

The battery, and tesla use is provided by Panasonic in 18650Cobalt acid lithium batteries.The material of batteries and other mainstream electric vehicles use lithium iron phosphate batteries compared with poor safety, fire risk is big, but the energy density is higher.ModelS can have such a great range, a big factor is the energy density of battery, but the risk is also multiplied.

Booming in recent years, new energy vehicles, with the progress of state subsidies and new energy technology, pure electric car prices gradually reduce, walk into homes, provides a better choice for green travel.

Although the pure electric vehicle has good momentum of development, with the popularity of electric cars.Also brings many problems, electric cars, the problem of spontaneous combustion in recent years, also make the batteries of electric cars security also let the concern of the public.This issue is under analysis of lithium ion battery really so "hot"?

Many friends know, gasoline belongs to flammable, explosive energy, electric vehicle power battery is not a vegetarian, temper is also very hot.Such as the top media headlines this year Samsung mobile phone "explosion door" event.Is caused by the mobile phone charging battery explosion, which also makes the public to know the power of lithium battery.

Batteries used in the present, pure electric vehicles, mostly lithium-ion batteries, lithium batteries because, with other than battery, it has high voltage, high specific energy, charge and discharge, long service life, no memory effect, no pollution, quick charging, low self-discharge rate, and the advantages of the safety level of working temperature range, is widely used in electric energy.

Usually we say that the most main power battery batteries, lithium manganese acid lithium iron phosphate batteries, cobalt acid lithium batteries and ternary lithium batteries (nickel cobalt manganese) three yuan.

The above all kinds of battery has advantages and disadvantages, summarized as follows:

The ternary lithium battery:

Advantages: high energy density, tap density is high

Disadvantages: poor safety, high temperature resistance, poor, poor life, high-power discharge, poor, elements, toxic (ternary lithium battery power after the charging and discharging temperature rise sharply, release oxygen, so it's easy to burn after high temperature).

lithium iron phosphate battery:

Advantages: long life, charge and discharge rate, good security, high temperature resistance, elements, harmless, the cost is low

Disadvantages: low energy density, tap density is low.

Manganese acid lithium battery:

Advantages: high tap density and low cost

Disadvantages: high temperature resistance is poor, manganese acid lithium temperature rise sharply after long time use, the battery life decay.

Cobalt acid lithium battery:

Usually used for 3 c products, security is very poor, not suitable for power battery

Lithium-ion batteries due to the lithium chemistry is very lively, makes the lithium metal processing, storage, use and require very high to the environment.

Lithium battery is a diaphragm avoid contact is the cathode.In the use of a certain period or after intense collision occurs, the lithium batteries are easily occur in anode diaphragm displacement, internal lithium inside the battery is directly connected, short circuit, resulting in cell spontaneous combustion.

Ordinary lithium ion battery electrolyte for organic liquid, can take place at not too high temperature adverse reactions, produce gas, easy to cause burning and explosion after expansion.If under the collision electrolyte leakage and was easy to burst into flames.

If fuel car intense collision occurs, unless the fuel tank is broken, and car.Fuel vehicles, by contrast, intense collision occurs, lower risk than the electric car fire.

Conclusion: compared with fuel vehicles, electric cars, although the more environmental protection, but the risk of power battery is very high, and after a fire vehicle fire extinguisher alone is difficult to fire;For electric cars, how to solve the security of the power battery is very important topic.

The page contains the contents of the machine translation.