When discussing battery performance, attention is often focused on cell chemistry, energy density, and charging capability. However, one component that can have a significant impact on the safety, reliability, and lifespan of a pouch cell is the tab.
At Avocet Battery Materials, we specialise in manufacturing pouch cell tabs, and we understand that even small variations in tab design, materials, or production quality can affect the performance of the entire battery.
Common Causes of Tab Failure
Pouch cell tabs provide the electrical connection between the electrodes inside the cell and the external circuit. During the life of a battery, these tabs are exposed to mechanical stress, temperature changes, and demanding operating conditions.
If a tab is not properly designed or manufactured, several issues can occur, including:
- Loss of electrical connection due to tab detachment
- Mechanical fatigue and cracking over time
- Corrosion or oxidation affecting conductivity
- Increased resistance and heat generation
- Short circuits caused by damage or poor assembly
In severe cases, excessive heat build-up can contribute to cell failure and create wider safety concerns.
Why Material Selection Matters
The performance of a pouch cell tab begins with the material itself.
Factors such as conductivity, mechanical strength, surface condition, thickness, and corrosion resistance all influence how the tab performs throughout the battery’s life.
At Avocet Battery Materials, we work closely with customers to ensure the correct material and tab design are selected for their specific application. Whether the requirement is high power, fast charging, lightweight construction, or long-term durability, the tab specification must align with the demands of the cell.
Testing for Long-Term Reliability
Producing a high-quality tab is about more than meeting a drawing specification.
Our testing programme includes peel strength evaluation and advanced ageing studies designed to simulate demanding battery conditions. These tests help verify that the tab and polymer seal continue to perform reliably even when exposed to elevated temperatures and long-term stress.
By validating performance before production, manufacturers can reduce risk and improve confidence in the finished cell.
Small Component, Big Impact
The tab may represent only a small part of the overall battery, but its influence on safety, reliability, and performance should not be underestimated.
As battery technologies continue to advance across electric vehicles, aerospace, eVTOL, energy storage, and defence applications, the importance of well-designed tabs will only continue to grow.
At Avocet Battery Materials, our focus is simple: to provide pouch cell tabs that help customers build safer, more reliable batteries.
Meet Us at The Battery Show Europe
If you’re attending The Battery Show Europe from 9–11 June, we’d love to discuss your current battery projects and how our pouch cell tabs can support your development and production goals.
Book a meeting with our team here:
https://calendly.com/avocetmaterialsgroup/abm-meeting
We look forward to meeting you in person.
