Battery Management System

A battery management system (BMS) is the control layer that makes a lithium battery safe and measurable: it watches every cell, enforces the pack's limits, calculates the state of charge and speaks to the charger and the load. Torphan's BMS platform is the PCS BMS — a DC 36 to 72V board set for 16-cell lithium iron phosphate packs, with active balancing and multi-bus communication.

Datasheet values

ItemSpecification
Working voltageDC 36~72 V
Max power3 W (not including balancing loss)
Cell quantity16 per BMS
Cell voltage measuring range1.0~5.0 V
Cell voltage measurement error+/-0.2%
Current measurement error+/-0.5%
Temperature quantity6 per BMS
Temperature measurement range-20 to 85 C
Temperature measurement error+/-1 C
BalancingActive balancing
Balance current2 A
Communication3 x CAN bus, 1 x RS485
Baud rate250 Kbps (CAN), 9600 (RS485)
DO port2 pcs
PO port8 pcs

What the BMS does

The manufacturer's feature list for its lithium ion battery BMS is specific: state of charge calculations; cell over-voltage and under-voltage protection; intelligent battery balancing (active); battery charger control; pack temperature monitoring; and health monitoring of the battery pack. Cells are protected against over-voltage, under-voltage, over-current, over-temperature and under-temperature according to the programmed limits in the battery profile, and the BMS triggers error codes if a cell or the pack falls into poor health.

On the storage side, the same platform is one of the three core components of the energy storage system alongside the cells and the power conversion system: it monitors voltage, current, temperature and state of charge in real time, and protects the battery to secure the safety and lifespan of the whole system.

Display and monitoring options

The range also records display units that show the internal condition of the battery cell by cell, with current parameters and historical data for reference in continuous use — the operator-facing half of the BMS. For fleet and plant integration, communication runs over three CAN buses and RS485.

Ordering a BMS

BMS specification starts from the pack: cell count, working voltage, balance current and communication requirements. Send those four items — or the pack datasheet they belong to — for a quoted configuration. Minimum order quantities and lead times are confirmed on quotation.

BMS and related systems

Request a quotation

Minimum order quantities and lead times are confirmed on quotation. Certificates available upon request.

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