from chemistry to pack
The BYD battery self heating system in the Denza Z9 GT means that even in cold conditions it just adds 3 minutes to the charge time. Not quite as the quote is from 20% SOC in -30°C conditions and not the 10% SOC starting point when the battery is warm. In the BYD European patent … Read more
What are the options for Thermal Interface Materials (TIM)? What is TIM? This is Thermal Interface Material and is designed to bridge the gap between surfaces and hence enable a better heat transfer. Thermal interface materials (TIMs) can be grouped and broken down in a few different ways, primarily by their product format (how they … Read more
The cell to cell temperature gradient in a battery pack will limit the performance and lifetime. However, there will always be a cell temperature gradient and a cell to cell temperature gradient. It is very difficult not to have if we are rejecting or absorbing heat. The cell to cell temperature differences can be due … Read more
Whatever the cell format and however we cool it there will be a temperature gradient. This is described by Fourier’s Law of Conduction. An empirical law stating that the rate of heat flow is directly proportional to the temperature gradient and the area of heat transfer, and inversely proportional to the thickness of the material. … Read more
AION Engineering INC When selecting cells for a battery pack, one of the most critical considerations is the discharge C-rate. While datasheets provide discharge ratings, understanding the difference between continuous and peak discharge C-rates — and their thermal implications — is essential for safe and efficient battery design. What is Continuous Discharge C-Rate? The continuous … Read more
AION Engineering INC Cylindrical cells are widely recognized as the most suitable format for high-speed roll-to-roll production, offering scalability and manufacturing efficiency. However, despite their structural advantages, thermal management remains a critical design challenge, especially under high-power operating conditions. Cylindrical cells are widely recognized as the most suitable format for high-speed roll-to-roll production, offering scalability … Read more
through Design, Thermal Management, and Revival Techniques Abstract Battery life (longevity) is a cornerstone of electric vehicle (EV) sustainability, particularly in fleet-heavy regions like India, where high usage, climate stress, and inconsistent charging behaviours accelerate degradation. At Yanti Innovative Electromotive Solutions, we focus on a revival-first approach to extend the functional life of EV batteries. … Read more
The 2022 Kia EV6 is an interesting vehicle, perhaps mostly because of the specifications around the battery pack. Specifications that have been achieved with some small steps in design. This platform is shared with the Hyundai Ioniq 5. The 2021 Hyundai Ioniq 5 pack had 30 modules and a total of 72.6kWh. In this design … Read more
What can we learn from Battery Benchmarking? was presented at the Battery Tech Show 2024 and has been abrieviated and turned into a post. We don’t have the resources to take batteries apart, but there are lots out there who do and they share lots of data. On top of that there are certification reports, … Read more
Creating a model of the thermal runaway process is complex as it covers a large number of subject areas. In order to model this it is important to take a multi-physics and multi-scale approach. Pannala et al [1, 2] published this time versus length plot back in 2015 and it shows an important aspect of … Read more