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Customer story · BESS and BMS development

From 24 cells to 2 × 132 channels: BMS testing that grew with a second-life storage business.

Scalable battery management system (BMS) testing supported the customer's growing business: from a compact development platform to two comprehensive test systems for second-life battery storage.

Read customer storyAll customer stories

Developing a BMS for second-life batteries

Our customer develops Battery Energy Storage Systems (BESS) based on second-life batteries from electric vehicles and relies on an in-house developed Battery Management System (BMS).

For initial development and BMS validation, a customer-specific Battery Cell Simulator (BCS) was implemented with 24 simulated battery cells as well as temperature, shunt, and insulation resistance (RISO) simulation. This allowed cell conditions, balancing functions, faults and boundary cases to be tested safely and reproducibly with defined simulated inputs.

Expanding test capacity as the company grows

As the company grew, the requirements for test capacity and production-related testing increased. The original setup was therefore expanded to two comprehensive BMS test systems, each featuring 132 cell BCS channels, 40 NTC/PTC channels, as well as integrated shunt and RISO simulation.

Initial development

24 simulated cells, temperature, shunt and RISO simulation.

Expanded test capacity

Two systems, each with 132 cell channels, 40 NTC/PTC channels, shunt and RISO simulation.

Compact and rack configurations of the comemso Battery Cell Simulator
BCS product family.

Project basis: anonymised customer project information supplied by comemso. The configuration and outcomes described here relate to this project; no independent certification report is presented.

More customer stories

Published customer project · Thailand
More power and EMC capability for a Thai test laboratory.
Read the story
Anonymised customer account · EVCA Multi Mobile
Precharge diagnosis after seven months of charging complaints, with about three minutes of recording analysis.
Precharge diagnosis
Customer story · Czech Metrology Institute · 2026
The Czech national metrology institute calibrates chargers from its own service vehicle.
Read the story →

Plan your BMS test system.

Connect your cell, sensor and test-capacity requirements to the right system.

Explore the Battery Cell SimulatorDiscuss your BMS test task

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