Why do car use lead batteries instead of lithium batteries?

After the battery for the car is used for more than 2 years, the discharge capacity will decrease, and the life of the general vehicle battery will not exceed 4 years. Compared with lead-acid batteries, lithium batteries have the advantages of high energy density, long life and small size. Why not switch to lithium batteries?

Lead storage battery is resistant to high and low temperatures

The biggest reason is that lead-acid batteries are resistant to high and low temperatures. At low temperatures, the discharge performance of a lithium battery is declining in attenuation. At minus 10 degrees, it will quickly lose power, and a lead-acid battery can start a car at minus 50 degrees. Lithium batteries are also afraid of high temperatures, and the engine compartment temperature of fuel vehicles is very high. Generally, lithium batteries should be protected up to 70 degrees.

Lead storage battery is more stable

Lead-acid batteries are safer than lithium batteries. When a lithium battery is discharged at a large current, lithium crystals are easily formed in the negative electrode, which may pierce the separator, causing the battery to short-circuit and explode. Due to the particularity of the driving conditions of the car, it is necessary to select a battery with high stability.

Lead batteries cost less

Finally, it is the cost of the old growth talk. The battery capacity of the general family car is 54-60Ah, the capacity is 0.648KWH, and the selling price is generally about 4~500 yuan. If the lithium battery is used, the lithium battery of the same capacity is probably needed. 70 batteries, priced at 1000+, the cost comparison is clear at a glance. At this stage, lithium batteries are not likely to replace lead batteries, and it may be possible to use lithium batteries in the near future if problems such as technology and cost are solved.

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