Custom Lithium Battery Design

  • High Voltage - 1000V
  • Subsea - Pressure Tolerant & Compensated
  • Charger Integration
  • System Integration
  • Custom Battery Management Systems
  • Custom Enclosure Design

Interested in our Battery Design & Manufacture Services?

Want to work with us to build your solution?


One of the key services that Altertek offer is the custom design of Lithium batteries bespoke to customer requirements.

We specialise in designing Lithium batteries for all situations, often with unusual requirements making them difficult to obtain off the shelf. We can easily handle irregular criteria, such as ultra high power densities, unusual shapes, modular design and custom integration.

With access to Lithium Cells from the world’s top manufacturers, we can design Lithium batteries from 1V up to 1000V in any number of parallel configurations to achieve the required performance. Previous projects have required us to design lithium batteries that operate at above 800V and output 200kW continuously but can be split into low voltage modules for ease of transport to test locations.

We can take care of all the mechanical, hardware and software design aspects and even design to ISO26262 for automotive applications.

  • Industrial Energy Storage
  • Hybrid & Electric Vehicles
  • Aerospace, Rail & Motorsport
  • Experimental & Prototype Lithium Batteries

Subsea Batteries

A major project completed by the Altertek team put a high power 800V Lithium battery over 3Km underwater for a subsea application to power equipment.

The Lithium battery was designed into a pressure compensated enclosure. Although many believed it could not be achieved, the enclosure successfully survived testing at simulated 3km depth and temperature.

The team designed the entire system, including the mechanical holding system, High Voltage Battery Management Systems, charge and discharge control systems and application integration.

As a result we are confident in designing and manufacturing batteries that can survive operation in subsea applications for use on:

  • ROV
  • UAV & AUV
  • Subsea Equipment
  • Submarines & Submersibles

View the Research

Take a look at the summary research paper on our subsea battery management system.

Got a project we can help with? Get in touch →