from chemistry to pack
“What are the benefits of a Magnesium battery pack enclosure?” arrived in my inbox with a link to the Estes Energy website. That got me looking at this particular design as a benchmark and also more generally about the use of magnesium as a structural material within the pack design. This post has been built … Read more
eUSRacing is a multidisciplinary team of students from the University of Seville, Spain. We design and manufacture an electric motorbike prototype for MotoStudent, a competition where universities from all over the world compete to build the best motorcycle for a MotoGP-style race at the MotorLand Arag´on Circuit. Engineering, marketing, and business students join forces with … Read more
The Ampace JP40 is a tabless 21700 cylindrical format cell designed to deliver high current discharge. Metrics A significant improvement in performance is achieved with the tabless design. The manufacturing video appears to show the ends of the jelly roll being bent over by an anvil that quickly comes in and punches the roll end … Read more
The 2025 Lucid Gravity battery has been hinted at and now finally we get some values via the EPA application data [1]. Plus some calculations based on the numbers we have been given. Pack This post has been built based on the support and sponsorship from: Thermo Fisher Scientific, Eatron Technologies, About:Energy, Quarto Technical Services and Alvatek. Module The module has … Read more
The 2024 Porsche 911 T-Hybrid battery pack is interesting as this is a high power HEV pack using 21700 cylindrical cells. In the image you can see the battery pack is quite small and sits over the front axle (top right-hand side of the image). Using the Battery Calculations Workbook it is possible to enter … Read more
The Electric Vehicles Clinic just released details of the Tesla Model 3 cell busbar failures. This is such an important topic that we thought we should cover these findings for the battery design community. In the Tesla Model 3 with the 21700 cell based battery packs the cell connections are single side and the connections … Read more
Metrics This post has been built based on the support and sponsorship from: Thermo Fisher Scientific, Eatron Technologies, About:Energy and Quarto Technical Services. Specifications It is interesting to note that in the EPA application the LDV 130 version has a usable pack energy of 76.3 kWh and our assumption is this based on the larger vehicle having slightly higher power … Read more
The Rivian R1 Gen 2 Battery has some big claims and appears to be a consolidation of the first generation of design (RIvian R1T Gen 1). The most obvious change is the enclosure profile as this is now a large high pressure casting. This accounts for a lot of their claims: This post has been … Read more
Initial tests of the Molicel P45B 21700 cells. By Stéphane Melançon, Melstronic Conditions: Measured with calibrated precision class 0.01 instruments for rated capacity measurement STANDARD at C/5 …. and more. All measurement including recharge were made using 4 wire (Kelvin) connections for top accuracy. 2 samples were tested: At C/5 At 1C : At 2C : … Read more
Ola S1 E-Scooter are the number one selling scooters in India in the electric 2 wheeler market. In 2023 Ola sold 252,647 units (till dec21). Ola S1 comes in three models: Ola S1 Pro, S1 Air and S1X. In this article we will see benchmarking of OLA battery pack for S1. S1 air and X … Read more