Battery pack and thermal engineering
for electric vehicles.

An independent engineering practice. From concept and simulation through test and validation — every decision documented, so your suppliers can quote and your certifier can accept.

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What we do

Block diagram of a vehicle thermal system: duty cycle, powertrain, battery pack, thermal system and cabin HVAC, all co-ordinated by one controller.

EV thermal & energy management

Design, modelling, control and validation built around thermal, energy and lifetime requirements.

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Illustrative render of an electric-vehicle traction battery pack: a flat sealed cover in a slim aluminium frame, with the high-voltage connector at one end.

Battery pack design, simulation & engineering

From a fuzzy pack request to a buildable, costed and certifiable specification.

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Selected work

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Bench photograph of a hardware-in-the-loop test rig: an aluminium frame carrying power electronics, current sensors, coolant lines and dense wiring harnesses.
EV Thermal

Modelling & validation platform

  • 1D system and 3D flow/thermal models calibrated against measured data — component calibration, system coupling and multi-condition test correlation.
  • Rapid prototyping and hardware-in-the-loop for real-time control-strategy evaluation — dSPACE / MicroAutoBox / HIL.
  • Component test benches, vehicle duty cycles and reliability testing.
Two plots of air-conditioning energy consumption over time, comparing an MPC controller against a PID controller.
EV Thermal

Thermal & energy management control

  • System and battery-state models fused to co-ordinate propulsion power with thermal actuators.
  • MPC and ECMS strategies benchmarked against a baseline controller in co-simulation.
  • Layered evaluation: model simulation, HIL and vehicle test, with performance and real-time capability judged separately.
Photograph of an instrumented vehicle on a chassis dynamometer inside a climatic test cell.
EV Thermal

Hybrid-vehicle thermal management co-development

  • System model built and calibrated against bench and vehicle measurements.
  • Component concept matched to the thermal duty cycle — compressors, valves, coolant loops and heat exchangers.
  • Coordinated control strategy across power split and thermal flow, assessed on a vehicle-level environmental cycle.

Vehicle-level environmental cycle, run in the climatic test cell.

About

Located in Shanghai, Violaeon is an independent battery-pack engineering practice, working with manufacturers in Europe and North America who are too small for a tier-1’s attention and too specialised for a standard pack.

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