Advantages and disadvantages of lithium battery of electric vehicles

There are many lead acid batteries. Lead-acid batteries have the lowest price, and it is widely used. China is the biggest producer of lead-acid battery in the world. Its composition contains less pollution and good recyclability. The disadvantage is that specific volume is small. That is to say, under the same capacity, battery weight and volume is bigger. The lead-acid battery is basically developed by floating type of battery. Floating battery don't adapt to the quick charge and large current discharge. Although technical personnel have spent a lot of work to carry on the effective improvement, it can enter the practical, while the cycle life is not very ideal.

Classification of gel battery is a kind of lead-acid battery development, the simplest approach, is added in the sulfuric acid gelling agent, sulfuric acid electro-hydraulic colloidal becomes. Electro-hydraulic of colloidal battery often called gel battery. Broadly speaking, the difference between gel battery and conventional lead-acid battery is not just about electro-hydraulic to gel.

Solidification states such as water-based gel, look from electrochemical classification structure and characteristics belong to gel battery. And like a knot in the plate grid with high polymer material, commonly known as the ceramic plate gate, can be regarded as the application characteristics of gel battery. Recent laboratory existing in plate, a targeted coupling agent is added to the formula has greatly increased the plate, the utilization of active substance reacts according to nonpublic information can reach 70 wh/kg weight than energy level, these are the current industry practice and needs to be industrialized application example of gel battery.

The difference between gel battery and conventional lead-acid batteries, from the initial understanding of gel electrolyte, a further development to research infrastructure of electrolyte electrochemical properties, and the application of sheeting and active substances. Its most important characteristic for: use a smaller industrial cost, along the 150 - year history of the lead-acid battery industry way to create more high-quality batteries, its flat discharge curve, inflection point, high specific energy, especially more than 20% higher power than conventional lead-acid batteries, life in general, about twice the length of a conventional lead-acid battery, high temperature and low temperature properties is much better.

Lithium ion batteries

Specific volume of lithium ion batteries are better than Ni-Mh batteries, for the same capacity of lead-acid battery, the weight of the lithium ion battery is equivalent to a laptop computer, so that the old women and children can be used. The life also can do better than Ni-Mh batteries. The current mobile phone batteries are basically used this battery. The lithium battery Internal resistance is relatively large, used on electric bikes will be you feel the car battery to completely discharge the power shortage. Lithium ion battery more problem is mainly in explode to over charge and discharge the battery, cell phone batteries are using monomer battery, again after a good protection circuit to cooperate to use, largely free battery explosion problem. And used on electric bikes, must use string battery pack, and the complexity of the string of battery protection circuit much bigger than that of the monomer battery protection circuit, and greatly increase the cost of materials. Currently the cost of a good lithium battery protection circuit is closed to the cost of the battery. While polymer lithium battery explosion damage is lower than the lithium ion battery, but also there is the possibility of explosion and combustion. This is like the lithium ion battery need to solve the problem.

1, lithium battery, light weight, average 4 kg, general girl can carry away very easily; Lead-acid battery is a set of general 17 kg, big man upstairs dead-beat also there.

2, lithium battery charge and discharge times of up to 1200 times, available about 3-5 years; Lead acid battery charge and discharge times to 300 times or so, only can use 1 to 2 years.

3, lithium traction motor for high speed toothed commonly, itself has a one-way guiding role, much like a flywheel, no electricity is like riding a bicycle as easily; Lead-acid electric motor is generally low speed with no teeth, no electricity, people should overcome the resistance of the phase line magnetic field lines when riding, basically it did not move, can only find a car away.

Buy lithium trams key is to see batteries, lithium electricity now whether imported or domestic technology has been very mature, market is rare, because the market purchasing power shortage, is not the manufacturer no seer.

General battery with this end there will be a manufacturer logo, better to have: dual dint, perseverance, Lishen, depressive Weida, Beyma, etc, but the price is expensive, with the peace of mind.

Lithium battery light weight small size

Lithium battery electric vehicle brand diversification at present, in the aspect of dynamic performance and the lead-acid battery (simple electric bicycle), charging 6 ~ 8 hours, depending on the battery capacity can run 30 ~ 45 kilometers, the weight is only about 1/5 of the lead-acid battery, and lithium battery cover 2 years commonly at present, lead-acid battery warranty 1 year.

Lithium-ion batteries have free activation

Lithium battery is easy to activate, if after 3 to 5 times the normal charge and discharge cycle can activate cells, back to normal capacity. Due to the characteristics of lithium battery itself, determines its almost no memory effect. New lithium battery in the process of activation, so users don't need special method and the device.

Lithium battery with memory effects

For lead-acid battery, nickel batteries, always worry about battery memory effect, and electric bicycle lithium battery with no memory effect, can be at ease charge and don't have to worry about the battery before charging power usage.

Lithium battery long cycle life

Lithium ion battery charge and discharge in 1 c rate, the cycle life is greater than or equal to 500 times, 500 times of electric capacity, 70% greater than the nominal TongLiang. And lead-acid battery even discharge at 0.5 to 0.15 C to charge, the cycle life less than or equal to 350 times, electric capacity is less than or equal to 60%.

Wide working temperature range

Electric bicycle lithium ion battery can be in 25 to 55 degrees within the scope of work, its capacitance can mark said 70% of capacity, while lead-acid batteries can only work within 10 to 40 degrees, not working in 25 degrees.

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Lithium battery charging time is short, the green environmental protection

Due to the electric bicycle lithium ion battery has the characteristics of large current charge, so the charging time as long as 4 to 5 hours, while lead-acid batteries need eight to ten hours. The corrosive environment harmful heavy metal lead, and it belongs to high environmental protection products.

Lead-acid battery technology cost is cheap, simple faults charge-discharge life of an average of 300 times to 300 times shorter lifespan, volume weight.

Lithium battery is one fifth of the lead-acid battery with the same capacity. It has long charge and discharge cycle life: ternary polymer li-ion battery charge and discharge times are 1000 times, and the highest electric charging and discharging life of lithium iron phosphate is over 2000 times. Weakness: the price is high, so the penetration rate of lithium ion battery is less than lead-acid. 90% electric cars and tricycle use lead-acid batteries.

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