BMS 12/200

Victron Battery Management System BMS 12/200

BMS 12/200 for 12,8 Volt Lithium-Iron-Phosphate batteries Specially designed for vehicles and boats
The MS 12/200 ensures:

• 12V 200A load output, short circuit proof
• Li-ion battery over-discharge protection
• Starter battery discharge protection
• Adjustable alternator current limit
• On-off switch with remote control

Why you need a Battery Management System (BMS):
1. An LFP cell will be destroyed if the voltage across the cell drops to less than 2,5V.

2. An LFP cell will be destroyed if the voltage across the cell rises to more than 4,2 V. Lead-acid batteries will eventually also be destroyed when they are deeply discharged or overcharged, but not immediately. A lead-acid battery will recover from total discharge even after being left in a discharged state for days or weeks (depending on the type and brand of battery).

3. The cells of an LFP battery do not automatically balance at the end of the charge cycle. The cells of a battery are not 100% identical. Therefore, when recycled, some cells will be fully charged or discharged sooner than others. Differences will increase if the cells are not balanced/balanced from time to time.

In a lead-acid battery a small current will continue to flow even after one or more cells are fully charged (the main effect of this current is the decomposition of water into hydrogen and oxygen). This current helps to fully charge other lagging cells, thus equalizing the state of charge of all cells.

However, the current flowing through a fully charged LFP cell is almost zero, and therefore lagging cells will not be fully charged. Over time the differences between cells can become so extreme that even though the overall battery voltage is within limits, some cells will be damaged by over or under voltage.

Therefore, a LiFePO battery must be protected by a BMS that actively balances individual cells and prevents under- and over-voltage

Specifications