Specific plan: Use a battery spot welder to connect individual 18650 batteries by spot welding on nickel foil.
All 12 batteries are connected in parallel in a group, then 16 groups of these batteries are connected in series, which is closer to 60V40ah.
All 12 batteries are connected in parallel, the capacity is 12*3400/1000=40.8AH
16 groups are connected in series, the voltage is 16*3 .7=59.2V;
The total request is 12*16=192 nodes.
The common 18650 rechargeable lithium battery has a voltage of 3.6 or 3.7 V. When fully charged, it is 4.2 V. This does not matter much to do with the power (capacity) of 18650 batteries. from 1800mAh to 2600mAh (the capacity of 18650 battery is mainly 2200~2600mAh), the main capacity even has a capacity of 3500 or 4000mAh or more.
InfDetailed information:
Common 18650 batteries are divided into lithium-ion batteries and lithium iron phosphate batteries. The rated voltage of lithium ion battery is 3.7V, the charging cutoff voltage is 4.2V, the rated voltage of lithium iron phosphate battery is 3.2V, the cutoff voltage charging is 3.6V, capacity is generally 1200mAh. 3350 mAh, common capacity is 2200 mAh-2600 mAh.
Baidu Encyclopedia-18650 lithium battery
Can 18650 battery be welded
1. Nickel sheets are inexpensive and the shapes can be irregular and diverse. .
2. Spot welding technology is mature, and the spot welding machines on the market are also very cheap.
3. Spot welding of combined lithium batteries can basically ignore production tools and save money.omit a lot of costs.
4. Maintenance and disassembly after welding are also more convenient. Some disassembled batteries only need to polish the cell welding surface for reuse. Nickel foils are easy to solder, have strong tin absorption, and are more economical and affordable than copper foils. Additionally, copper has a drawback: it oxidizes easily in air. When the battery is opened, there will be green color. patina --- DeVos lithium battery reminds you!
Generally, the tabs of 18650 batteries, whether lithium batteries or cylindrical batteries like nickel-metal hydride, should be made of nickel sheets. I don't know if my understanding is correct. nickel foil, it needs When you use copper wires for series connection or lead wires, you can use a method ofe welding suitable for nickel sheets, for example using an electric soldering iron. Welding uses Weioding WE88C welding wire with low temperature of 230 degrees. and welding with WE88C-F flux
< p>If it is other materials, I hope to continue to ask, I can continue to answer you, I wish you good luck!