The Difference between Lead-acid Battery and Lithium Battery
Lead-acid process is simple, cheap, short charge and discharge life of 300 to 500 times on average, heavy volume.
With the same capacity is lead acid weight of 5, charge and discharge life is long: ternary polymer charge and discharge times 1000 times, the highest lithium iron phosphate charge and discharge life of 2000 times. Disadvantages: high price so the penetration rate is less than the wide lead acid, electric cars and tricycles are 90% of the lead-acid battery.
Are lead or lithium batteries better for electric cars? Of course the lithium battery is good! Lithium batteries are better. Both the volume and weight of lithium batteries are more than 3 times higher than lead-acid batteries. Lithium batteries are smaller and lighter. Long cycle life. The cycle life of lithium battery used in electric vehicle is generally more than 800 times. The lithium battery with lithium iron phosphate anode material can reach about 2000 times, exceeding the lead acid battery by 1.5 ~ 5 times. This greatly reduces the cost of lithium battery, extends the service life and improves the convenience. 1. In terms of battery capacity, lithium batteries generally have a capacity of 8-10 amperes, while lead-acid batteries have a capacity of about 20 amperes. 2. Driving kilometers
Lead acid batteries explode? Lithium batteries are safer to use
Electric vehicle spontaneous combustion explosion often occurs, most are caused by battery charge and discharge, experts explain, lead-acid battery charge time is too long, charge to the end, the poles into effective substances, if continue to charge, will produce a lot of hydrogen, oxygen gas. When the concentration of this mixed gas in the air accounts for 4%, and there is no time to escape, if the exhaust hole blocked or too much gas, meet open fire will explode, light damage to the battery, heavy injury, damage. In other words, lead-acid batteries, if overcharged, increase the chances of an explosion. Currently, lead-acid batteries on the market do not provide any "overcharge protection", which makes lead-acid batteries, especially at the end of charging, extremely dangerous.
Now lithium battery can be very good to avoid this problem, such as lithium intelligence dog BMS battery management system can provide full protection to the battery, the function includes: charge/discharge high and low temperature protection; Single over-charge/over-discharge voltage protection; Charge/discharge overcurrent protection; Cell balance; Short circuit protection; Charging reminders and so on. One is to try to extend the life of the battery, two is more secure to ensure.
Durability:
Lead-acid battery generally deep charge and discharge within 400 times, memory, life of about two years. If the use of maintenance-free lead-acid battery, it is important to note that the battery water loss is small, the use of generally do not need to add distilled water. Lithium battery is durable, slow consumption, charge and discharge more than 500 times, and no memory, the general life of 4-5 years.
According to experts, in terms of durability, lithium battery has good seismic resistance, the battery in the fully charged state is safely fixed, vibrates at the amplitude of 4mm and frequency of 16.7hz for 1 hour, no leakage, no expansion and rupture of the battery, and the open circuit voltage is normal; Good overcharge resistance, 25 c, fully charged battery 0.1ca charging 48 hours, no leakage, no battery expansion and rupture, open circuit voltage normal, capacity maintenance rate of more than 95%; Good resistance to large current, fully charged battery 2CA discharge 5 minutes or 10CA discharge 5 seconds, no conductive part fuse, no appearance deformation.
Volume and quality:
General lead-acid battery pack weight is 16-30 kg, large volume; Lithium battery is generally in 2-6 kg, the volume is relatively small, so riding light, easy to carry. As far as quality is concerned, it is difficult to define which is better or worse. Consumers can buy batteries produced by regular manufacturers according to their own needs.
Price, warranty period:
At present, the mainstream battery in the market is 48 volts. If it is replaced, the lead-acid battery will cost about 700 yuan and the warranty period is one year. Lithium batteries are relatively expensive, costing around 1,200 yuan, but with a three-year warranty.
Driving km:
With the same 48-v battery, both lead-acid and lithium-battery electric cars can travel 30 to 40 kilometers on a full charge. The speed depends largely on the size of the motor used.
Battery capacity:
The lead-acid battery has a capacity of about 20 hours. Lithium battery capacity for any configuration.
Environmental protection:
In 2012, the state issued the "lead-acid battery industry access conditions", after the restructuring and integration of the lead-acid industry, most manufacturers have adopted the internalization of cadmium and arsenic free green production, more environmental protection, more energy saving, only in the recycling process, if the method is not appropriate may cause pollution; Lithium batteries are relatively green in production and recycling.
1: gold bell cover iron cloth shirt (hard!) Lead-acid boss has been in line with his strong he strong, qingfengfushan. He heng ren he heng, bright moon as the principle of the river. Lead-acid batteries are well fed, so you can throw them away, tinker with them, and keep using them.
2: cabbage price (cheap!) It is because of this that the leader of lead has been able to dominate the battery society for many years. Cheap, in addition to cheap or cheap.
3: recycling and recasting (recyclable reverse repair) lead-acid batteries come with recyclable skills. After being used out, you can go to the electric car store to exchange the old for the new, and you can exchange a new set of batteries after making up the price difference to minimize the loss, which is a big benefit for users.
Now that we are done with it, let's take a look at the disadvantages of lead-acid battery: large volume and weight, limited battery capacity, short life, lead-acid battery is generally in deep charge and deep discharge 400 times or less, with memory, life of about two years.
1: the hebrev light work (light weight, small size) since childhood light work into the lithium battery and the market with the same capacity of lead-acid battery compared, the volume of lithium battery is lead-acid battery volume 2/3, weight is about one-third of the weight of lead-acid battery. A lithium-ion battery of the same size has more capacity than a lead-acid battery, and the weight loss adds about 10% to the vehicle's range.
2: health durability (life expectancy) lithium battery is deep health, the average life of lithium battery is about 4 years, than the lead acid battery life is about 1.5 times higher, more than 500 times charge and discharge, the battery has no memory, strong earthquake resistance.
3: heir-passed qidong expelling method (overcharge resistance, good charge-discharge resistance) since childhood, the lithium battery can get through the odd eight pulse, so that under normal temperature, the lithium battery can be charged continuously for 48 hours without the battery expansion, leakage, rupture and other accidents, the capacity remains above 95%. And in the special charger, can be charged and discharged quickly.
Lithium battery has many advantages, but its disadvantages are more obvious.
Lithium batteries are expensive to make, with expensive equipment accounting for about 40% of production costs and about three times the price of lead-acid batteries. Moreover, lithium batteries are not recyclable, so they can only be thrown away if they are worn out, or they can be buried somewhere. After thousands of years, later generations will dig them out and find them as antiques.
The most important problem is the potential safety hazard of fire and explosion of lithium battery, especially in the case that consumers are cheated by unscrupulous dealers to buy inferior lithium battery without their knowledge. In the case of electric vehicle, this kind of sealing condition is not very good, and it is easy for moisture to lead to poor contact and other reasons to cause potential safety hazard. But now the technical performance of lithium battery is also improving, is also using high security materials, the existence of security risks may be just small trivial worries, perhaps not for a long time is the world of lithium battery also maybe.
