PRANA series · BMS

Battery Management Systems

PRANA Series: 1500V DC Automotive-Grade Hardware Intelligence

BMS Hardware|

Overview Silicon & Hardware State of Charge Active Balancing Safety

Overview

Sub-millisecond cell safety for 1500V high-voltage storage

PRANA BMS is Powertrace’s proprietary high-voltage battery management system, designed and coded in India for mission-critical utility and industrial applications. PRANA provides continuous monitoring of cell voltages (±1 mV accuracy), temperatures, and electrochemical impedance.

With active cell balancing to prevent capacity loss and dual-MCU galvanic isolation, PRANA ensures maximum usable battery lifespan past 6,000 cycles.

Silicon specifications

Hardware-Level Precision

Built on automotive-grade microcontrollers with redundant CAN 2.0B / Modbus TCP communication buses and optical galvanic isolation.

1500V DC

Bus isolation voltage

± 1 mV

Voltage measurement accuracy

< 1 ms

Telemetry loop refresh

Three-tier monitoring · cell to system

BMU

Battery Module Unit

Sits on every module: reads each cell's voltage and temperature and balances the cells.

BCMU

Battery Cluster Management Unit

Coordinates the modules in a string, measures string current and insulation, and drives its contactors.

BMS

System Master

Aggregates every cluster into one system view and reports SoC, SoH and alarms to the VYOM EMS.

PRANA Master-Slave Topology: Supports up to 24 battery modules per string with multi-string master controller coordination.

State of charge

Accurate where LFP is hardest to read

PRANA's adaptive EKF holds its state-of-charge estimate within ±2% through a full dynamic cycle, including the flat voltage region where common methods drift or guess.

Illustrative comparison based on Powertrace's SOC algorithm model.

±2%

maximum SOC error with PRANA's adaptive EKF

±5%

hunting by a standard Kalman filter on the flat region

~10%

drift from coulomb counting after two hours

Designed in-house

The board behind the estimate

PRANA's state-of-charge algorithm runs on hardware our team designs, from layout to firmware.

Cell sense connector

16 cell-voltage taps (C1–C16) and two temperature inputs (TEMP1, TEMP2).

Analog Front End (AFE)

Monitors individual cell voltages, measures module temperatures, and executes cell balancing and fault protection.

Balancing switches

One switch per cell (Q1–Q16) to bleed charge from fuller cells.

Balancing resistors

Dissipate the excess charge so all cells stay level.

Communication ports

Link the board to the rest of the battery system.

PRANA · cell monitoring board

Longevity engineering

Active vs Passive Balancing Capabilities

How PRANA prevents thermal runaways and extends pack life past 6,000 cycles.

Active Balancing (Bidirectional)

Transfers energy from higher-charged cells to lower-charged cells during charging and discharging with up to 5A balancing current, minimizing heat generation.

State-of-Health (SoH) Estimation

Electrochemical model-based Kalman filtering tracks cell impedance degradation and capacity fade to alert operators before failure occurs.

Real-Time Insulation Monitoring

A dedicated analog front end measures insulation resistance (IR) continuously while the system runs, catching degrading isolation before it becomes a ground fault.

Automotive & utility compliance

Certified Compliance & Multi-Tier Safety

PRANA hardware is built to satisfy rigorous IEC 62619 and UL 1973 standards for stationary and motive energy storage applications.

IEC 62619 Compliant1500V Galvanic IsolationNFPA 855 Ready

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