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Guangzhou Great Power Energy & Technology CO., LTD.

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Which Is Better, Lithium Battery or Lead-Acid Battery Electric Bicycle?

Aug. 31, 2020

Lithium batteries are better. Lithium batteries are more than 3 times higher than lead-acid batteries in terms of volume ratio energy or weight ratio energy. Lithium batteries are smaller, lighter, and have a long cycle life. The key to running far is battery capacity.

For example, both are 48V20AH. Lithium batteries and lead-acid batteries are basically the same because the capacity is the same, but the lithium batteries are lighter, so they can be slightly farther than lead-acid batteries.

But if the lithium battery is 48V10AH and the lead-acid is 48V20AH, then lead-acid is definitely far away, needless to say. To put it simply, whoever has the larger capacity will run far. The advantage of lithium battery over lead acid is that it is lighter and can discharge at large current.

Although lead-acid batteries are bulky, they are more stable and safer than lithium batteries! As long as it is a battery, whether it is a lithium battery or a lead-acid battery, it is a heavy pollution commodity!

1. At present, there are still more lead-acid batteries for electric vehicles on the market than lithium batteries. The reason may be that the cost of lithium batteries is still relatively high. Therefore, in the design of the existing "lithium electric bicycle" products, the capacity configuration of reducing the lithium battery is often used to correspondingly reduce the implementation cost of the whole vehicle, and this makes the existing "lithium electric bicycle" product models too unitary.

Lead-acid batteries and lithium batteries cannot be judged solely on the basis of good or bad. Both have their own advantages and disadvantages and are suitable for different groups of people. At present, most of the lithium battery products on the market are "electric bicycle" and the range is not very long, but like four-wheel electric vehicles, four-wheel electric scooters for the elderly, which are relatively long-range, the current situation is still more suitable for "lead-acid batteries".

Lithium Batteries

2. Lithium ions mainly rely on the movement of lithium ions between the positive electrode and the negative electrode to work. During the charging and discharging process, Li+ intercalates and deintercalates back and forth between the two electrodes: when recharging the battery, Li+ deintercalates from the positive electrode and inserts into the negative electrode through the electrolyte, the negative electrode is in a lithium-rich state; the opposite is true when discharging. Generally, batteries containing lithium elements are used as electrodes. At this stage, the most negative electrodes are graphite. Compared with lead-acid batteries, lithium batteries have the advantages of a lightweight, large specific capacity, and long cycle life.

3. The electrodes of lead-acid batteries are mainly made of lead and its oxides, and the electrolyte is a sulfuric acid solution. In the charged state of a lead-acid battery, the main component of the positive electrode is lead dioxide and the main component of the negative electrode is lead; in the discharged state, the main component of the positive and negative electrodes are lead sulfate.

4. Except for both batteries, they are all energy storage devices. Lead-acid batteries are safer and cheaper, but their energy density is lower than that of lithium batteries, so lead-acid batteries are larger.

If you want to talk about the endurance, other conditions are exactly the same, and the battery capacity is also the same, it may be that the lithium battery is a little bit better, why? Because the lithium battery is lighter, the weight of the whole car is lighter, of course, it runs a little longer.

The above information is provided by the lipo battery manufacturer.