BMS 10s LiPo/LiIon - 35A (symmetrical)
- Purpose: Battery 10s, LiPo/LiIon, Maximum continuous discharge current: 35A
BMS 10s LiPo/LiIon - 35A (symmetrical)
Battery management system (BMS) - it is a device that automates the entire process of using batteries. After connecting a suitable charger to the BMS, it monitors its proper charging and discharging. It is an integral part of a properly constructed electric bike.
Lithium batteries (lithium ion, lithium polymer and others) are serviceable and require care and attention. They cannot be charged above 4.2V per cell and discharged below 3V per cell. In order to supervise them in everyday use, a device called BMS was invented.
TASKS PERFORMED BY BMS:
During charging, it balances and aligns individual sections so that they do not exceed the maximum safe voltage of 4.2V / cell. It automatically cuts off the charger if any of the cells are close to being reloaded.
During discharge, it makes sure that we do not discharge the battery too deep. In the event that any of the cells is already discharged - the BMS will cut off the power supply to the bike in order not to damage the batteries.
He tries to align the cells so that they always have the same voltage. This extends the service life and failure-free operation of the entire power supply.
TEMPERATURE SENSOR AND SWITCHING CIRCUIT
BMS has a temperature sensor for thermal protection of the cells (insert the black sensor between the cells).
The BMS also has switch circuit to be used when the battery has its own on / off switch. Original the switch circuit is closed and the BMS is constantly turned on (it works like a normal, typical BMS). If you disconnect the switch circuit (white wire) and install an ON-OFF bistable switch on it, you will be able to turn the BMS output on and off.
Cabling is included with the BMS.
-B: We connect the MINUS from the battery to this field
-P: Connect the MINUS from the charger and MINUS from the controller to this field
The black wire here BC0-, is the first cell from the battery MINUS
Another red wire here BC1, is the first PLUS cell and the second MINUS
Another red wire here BC5 (from the right), is the fifth PLUS cell and the sixth MINUS cell
Another red wire or BC9- ninth PLUS cell
Another red wire here BXX- (Last wire) - The last battery cell (so FIRST from the plus)
Notes and Tips:
For proper operation, BMS requires an appropriate charger compatible with the battery operating voltage.
We recommend BMS assembly by people familiar with the subject of electronics / power. We suggest checking the correctness of connections 3x before the final start-up.
In an installation with a BMS, overcurrent circuit breakers, fuses and soft starters are not used. The BMS is not disconnected from the battery, it remains connected all the time.
The most common problems when connecting a BMS are confused and incorrectly soldered connectors to the cells: always check the connections 5x before connecting everything to the BMS. Draw everything on a piece of paper. Use a meter / multimeter. If in doubt, contact our technical department and study the connection diagram and descriptions available on the web.
The correct sequence of connecting the BMS:
1. Connect the battery cable (MINUS) to the appropriate field in the BMS -B
2. Connect the cable from the controller (MINUS) to the appropriate -P field
3. Connect the cable from the charger (MINUS) to the appropriate -P field
4. Connect the PLUS wires of the controller, battery and charger (it may spark slightly - this is normal)
5. Finally, connect the balancer cables to the balancer connector (make sure they are soldered in the correct order beforehand)
6. After completing the installation, connect the charger for a moment to activate and unlock the BMS at its first start-up.
You should avoid assembling the BMS cables in a different order, it may end up damaging them.