The battery is designed and produced by VELOKS. Only new quality cells from Panasonic is used. For 1, 2 and 3 kWh batteries NCR18650PF 2900 mAh are used, and for 4 kWh NCR18650B 3400 mAh are used.
The batteries consist of 16 “cells blocks” in series, i.e. 60 V nominal. Each “cell block” consist of either 6, 12, 18 or 21 matched cells in parallel. The cells are connected via 100% pure nickel strips that are spot welded to the cells. To ensure equal current load to each individual cells, the main power wires are connected to the cells blocks by means of a solid cobber bus, and “cells blocks” are interconnected in series between each individual cells by nickel strips. The battery box is a sandwich construction that is made of carbon fiber as the outside layers, Kevlar as the middle layers, and fiber glass as inside layers. This ensures a very strong and stiff, yet crack resistant box, which is electrical isolated.
The battery is protected by means of a battery management system (BMS). The BMS will limit the charge current to 10A and limit the discharge current to 80A to protect the battery. Also when charging the battery, the “cells blocks” are automatically balanced when the battery is charged to 100%.
The VELOKS MK3 trike support battery capacities from 1 kWh to 4 kWh, and such batteries have a relatively high weight from 6 kg to 17 kg. By placing this weight at the center under the seat, it will improve the stability of the trike (lower center of gravity). It also “hides” the large battery from sight and makes the trikes look better. Thirdly, the battery has 4 mounting points, and can be easily removed by opening the two snap clips and sliding out the battery. This is handy if you need to charge the battery inside due to lack of external power, or to ensure that the battery starts with maximum capacity when it is very cold outside.
The battery box contains the lithium cells, the motor controller and the battery management system. The total weight of the battery box is for 1.5, 2 and 2.5 kKh = 12 Kg and for 3.0 kWh = 13.8 Kg
Depends on two things, the charger maximum current, and the installed battery capacity. Using the standard charger (8A) that comes with the trike, for the 2 kWh battery, charging an empty battery to 100% will take approx 5 hours. If the charger deliver less or more than 8A, the charging time will change accordingly. (i.e a 5A charger will increase the above charging times by 60%).