Welding lithium-ion cells 18650 into a package
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Welding lithium-ion cells into a package
We weld cells using a professional welding machine with pure nickel strips 99.9% acc. individual client project. Before welding, the cells undergo tests for capacity and internal resistance
Three steps to order a package:
1. CONTACT
2. CELLS
3. BASKET
Note:
The cells are welded into a battery pack upon customer order. Due to the custom nature of the order, this item is non-returnable and cannot be modified after welding.
Basket template for printing is available in the file below – use it to simulate the shape and dimensions of the battery pack being built. Note: Print at a 1:1 scale. After printing, check whether both marked dimensions of 50mm are accurate. If not, the baskets may have been printed at a different scale, and the dimensions will not match.
Download template - Click here
The actual capacity of the battery pack (available capacity) is always lower than the nominal capacity of the pack (the nominal capacity of the cells it consists of). It is generally assumed that a finished battery based on a pack will have approximately 10% less real capacity than the theoretical nominal capacity. This is due to various factors, such as the decrease in cell capacity under load or the unused capacity left by the BMS (discharge to the minimum cell voltage of around 2.7V) to extend the battery's lifespan.
If your BMS has an activation circuit (two white wires) and it is disconnected (wires are not shorted), you need to connect (short) the wires to turn on the BMS.
Example battery packs made by our company
Each cell and package in the nexun.pl online store is covered by a 24-month warranty for consumers and a 12-month warranty for companies.
The warranty covers:
- Cell damage
- Capacity decline (over 15% per year)
The warranty does not cover:
- Errors in assembly that do not comply with the manual or workmanship
- Improper maintenance
- Mechanical damage
- Changes in the product's operating characteristics depending on weather conditions (temperature)
- Water damage
To maximize battery life, use the following recommendations:
1. Fully charge the battery after each ride
2. Fully charge the battery every 3-4 weeks when you do not use it, e.g. winter break.
3. In the autumn and winter (temperature below +12*C), lithium-ion batteries have a lower capacity (by max. 30%) than in the summer, which results in a shorter range. This is normal. During this period, do not use the full powerf or the first 10-15 minutes of riding.