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To make an electric vehicle 60V using 18650 type lithium batteries, at least 192 of these batteries are required.

Specific plan: Use a battery spot welding machine to connect individual 18650 batteries through nickel spot welding!

Every 12 batteries are connected in parallel as a group, and then 16 groups of such batteries are connected in series, which is closer to 60V40ah.

Parallel connection of every 12 batteries, with a capacity of 12 * 3400/1000=40.8AH;

16 sets in series, voltage of 16 * 3.7=59.2V

The total demand is 12 * 16=192 sections.

Special reminder: Lithium batteries are highly sensitive to voltage and must be equipped with reliable battery protection board devices before use. Plays a protective role!

You haven't considered the issue of voltage. A single 18650 battery has a rated voltage of only 3.7V, while an electric vehicle battery pack requires at least 48V (36V is rare), and it takes about 13 18650 batteries connected in series to achieve the desired voltage. So according to your connection method, 130 18650 batteries are needed to form a battery pack, which means that every 10 batteries are connected in parallel, and then 13 such batteries are connected in series to achieve a capacity of 48V30AH. A regular brand 18650 battery would definitely cost over a thousand yuan for 130 units.

This is all the materials needed to assemble a set of 18650 electric vehicle lithium batteries, including a stainless steel battery box

List of materials required for assembling 18650 electric vehicle lithium batteries

This is the accessory material, wire adhesive tape heat shrink film, and a voltmeter. The voltmeter is installed on the battery box to determine the battery level

List of materials required for assembling 18650 electric vehicle lithium batteries

The partition and bracket for fixing 18650 batteries, as well as the protective plate, must be included. Lithium batteries must have a protective plate, otherwise they will be scrapped after one use

List of materials required for assembling 18650 electric vehicle lithium batteries

The most crucial factor is the 18650 battery, and electric vehicles must choose power cells

List of materials required for assembling 18650 electric vehicle lithium batteries

Directly shipped by the manufacturer, the battery cells must be genuine. The battery cells from counterfeit manufacturers have a short lifespan and a relatively high failure rate

List of materials required for assembling 18650 electric vehicle lithium batteries

Finally, just put it into the battery box, stainless steel is better

List of materials required for assembling 18650 electric vehicle lithium batteries

The weight of the battery box

The battery is a domestically produced 18650 lithium battery from the Yangtze River. After testing, the battery life is still very good, and the price is very cheap at 4.5 yuan per unit. It is difficult for people without spot welding machines to assemble it themselves. Today, we will make a battery pack made with an electric soldering iron

This is a protective board, because it is a small battery, the board does not require much current and is not expensive at 60 yuan

The board also comes with a balance, which ensures that each group of batteries is fully charged during charging

Let's arrange it first and put it in the battery box, which is just right, much lighter than lead-acid. This way, one hand can lift the electric bike and carry it upstairs without fear of theft

Copper bars need to be punched and then welded because copper has good conductivity and will not rust over time

This way of soldering, one per second, very fast, provided that the power of the soldering iron is greater than 60W, low-power ones are more difficult to solder

After drilling, it needs to be polished

Once welded in this way, the battery compartment can be installed and used

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