Our development process

We can support you with:

  • Custom battery system design and development
  • Mechanical and electrical engineering solutions
  • Validation and industrialisation of a battery design
  • Battery management systems design and development
  • System integration and materials research
  • Cells recommendation and components sourcing
  • Rapid prototyping: jigs, fixtures and pre-series PCBs
  • Software management
  • Testing services

How we work

Consulting and planning

Understanding your business needs is vitally important. We listen to your challenges before exploring all options to find the best possible solution for your business.

Our expertise and resources allow us to strategically consult, plan and execute each project to provide innovative, cost-efficient and tailored solutions. Our team is available to you at every phase of the product development process, providing technical support and guidance on the suitability and manufacturability of the battery system design.

Prototype services

Rapid prototypes are crucial in the early stages of battery design. They must be inexpensive and easy to produce to quickly explore all possible types of interaction and the best fit for an application.

Our engineering capabilities enable us to deliver highly representative functional prototypes for mechanical, plastic (FDM), metal and electronic components in a timely and effective manner.

Our dedicated in-house prototype laboratory ensures confidentiality and allows us to adapt promptly to your prototyping and product development needs.

Testing services

We provide thorough testing services to the highest possible standard. Our modern and well-equipped testing laboratory enables us to carry out periodic quality assurance testing for complex products, thus providing a complete technical service.

We can perform the following tests:

  • UN transportation test
  • IEC 62133
  • ESD to IEC61000-4-2
  • Multiple mechanical tests, including IP tests

Cell selection

Being an independent cell supplier, we're able to tailor our chemistry to deliver the best cell type for each application. This allows for greater flexibility to achieve the best solution, without compromising on quality or cost.

We have access to a wide supplier base and have established strategic relationships with all major worldwide cell manufacturers.

In addition, regular audits and independent cell testing help us ensure consistent quality of cells.  


JM is continuously investing in innovation and its manufacturing capabilities to be able to provide the best quality products for customers at scale.

Our production capabilities include manual, semi-automated and automated solutions. Our high-volume production experience and flexible approach enable us to design cost-effective production lines for our customers.

Contact us

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Sylwia Grela

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Petr Grzegorz

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A broader look at JM's battery systems expertise

Battery systems documentation

Terms of purchase and sale, and global supplier and packaging manuals