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Lighter doesn't mean worse !
Is there a correlation between battery weight and battery quality?
One of the frequently asked questions is about the weight of the batteries manufactured by our company. Customers often compare the weight of a stock battery to ours.
Indeed, there is some correlation between the weight of the finished battery and the quality of the assembly and the quality of the cells. It is especially noticeable when comparing two batteries made of identical cells.
Indeed, there is some correlation between the weight of the finished battery and the quality of the assembly and the quality of the cells. It is especially noticeable when comparing two batteries made of identical cells.
At Techmake LAB 90% of batteries are assembled on 21700 cells from Panasonic, Tesla, LG, Samsung, Eve, Lishin and other proven manufacturers. Capacity of such cells is 4.8-5Ah, weight of one cell is 70 grams.
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Stock batteries of bicycles Minako, Jetson, Amiko, Virus, HUACHI, scooters Citycoco are assembled from cells 18650 capacity of such cells 2,5-2,6 AH, weight 45-49 grams.
Let's take the example of a 60V 20AH battery - it consists of 64 21700 cells and has a weight of 4.6 kg (without case). If such an assembly is assembled from 18650 cells, the number of cells used is 128 pcs, and the weight of such a battery without the case is 5.8 kg. Therefore, it is misleading to determine the quality of the battery only by weight.
Let's take the example of a 60V 20AH battery - it consists of 64 21700 cells and has a weight of 4.6 kg (without case). If such an assembly is assembled from 18650 cells, the number of cells used is 128 pcs, and the weight of such a battery without the case is 5.8 kg. Therefore, it is misleading to determine the quality of the battery only by weight.
TO THE SAME
In this case there is rather an inverse dependence - the battery assembled from 21700 cells will be lighter, but the quality of such assembly will be higher, because the number of cells used in parallel is less, the number of connections is less, and therefore the potential probability of welding defects is also less.
outcome
At the moment, there is a growing trend among manufacturers of electric vehicles to use 21700 cells instead of 18650, because there is another feature of this design - more efficient use of the remaining free space between the assembly and the walls of the case.
Another feature of this design is the more efficient utilization of the remaining free space between the assembly and the enclosure walls. The techmake lab store offers a huge assortment of batteries for electric vehicles.
Another feature of this design is the more efficient utilization of the remaining free space between the assembly and the enclosure walls. The techmake lab store offers a huge assortment of batteries for electric vehicles.
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LLC "TECHMEIK LAB"
TIN: 9718220288 KPP: 771801001
Legal address: Moscow, Elektrozavodskaya St., 21, office 205.
TIN: 9718220288 KPP: 771801001
Legal address: Moscow, Elektrozavodskaya St., 21, office 205.