from chemistry to pack
Lithium-ion batteries are the backbone of modern electric vehicles (EVs) and energy storage systems, but their high energy density comes with severe safety risks. The primary threat is thermal runaway (TR), an uncontrollable, self-sustaining chain reaction where a battery’s heat generation vastly exceeds its ability to dissipate heat. During TR, internal temperatures can rapidly escalate … Read more
Author: Dominic Pascal Förstermann, Akkuracy Battery chemistry choices affect everything from product safety certifications to insurance and procurement decisions — yet the common viewpoint remains “LFP is safe, NMC is dangerous.” But is that actually true? This article looks at the empirical data. In order to describe the safety aspects fully, it is split into … Read more
Authors: Antonio Garcia Martinez, Carlos Micó, Imad Elkourchi, and Jaime Martín CALBET (CALorimetric Battery Energy Tool) is an in-house thermodynamic model developed at CMT – Clean Mobility & Thermofluids, Universitat Politècnica de València (UPV) to analyze the thermal runaway (TR) behavior of lithium-ion cells under accelerating rate calorimetry (ARC) conditions. The model has been designed to provide a fast, robust, and … Read more
The Lithium-Hydrogen Gas battery cell operates through redox of H2/H+ on the cathode and Li/Li+ on the anode. The universal properties of the H2 cathode enable the battery to demonstrate attractive electrochemical performance, including high theoretical specific energy up to 2825 Wh kg−1, discharge voltage of 3 V, round-trip efficiency of 99.7 %, reversible areal capacity of 5–20 mAh cm−2, all-climate characteristics with a … 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
This post presents an example of the Thermal Runaway Modeling and Calibration of an LFP Battery Cell using the ARC device, the HWS test protocol and Simcenter Amesim. An abuse test is the most direct way to challenge the thermal stability limits of a Li-ion cell and characterize the thermal runaway phenomena. The Accelerating Rate Calorimeter (ARC) test … Read more
Maintaining battery production quality and improving performance, lifetime, and safety requires application of a variety of analytical techniques. Confirming material composition and purity, ensuring the homogeneity of electrode slurries, detecting defects that can cause short circuits and certifying feedstock materials extracted from recycled batteries are all processes that depend on analytical testing. Investigating the mechanisms … Read more
Enhancing Li-Ion Battery Safety: The Imperative of Rupture Disc Integration for Overpressure Mitigation Author: OsecoElfab Introduction The rapid growth of Li-Ion batteries in various industries, including electric vehicles, portable electronics, and renewable energy storage, brings to the forefront a critical safety concern: thermal runaway and its potential to trigger overpressure explosions. To address this imminent … Read more
Author: Nrusimhan Seshadri, Balance Batteries Having looked at the challenges and regulatory standards relating to fire hazards posed by Li-ion batteries in the previous article, in this article we will have a look at some of the fire mitigation strategies deployed across 10 BEVs in the current market. The choice of thermal barrier materials (TBMs) for a … Read more
Author: Nrusimhan Seshadri, Balance Batteries Thermal hazards of (Li-ion batteries) LiB’s are well known. The spontaneous exothermic release of energy from LiBs when subjected thermal, mechanical and/or electrical abuse is referred as thermal runaway. Though the chances of thermal runaway in modern EV’s are extremely low, the danger posed by EV battery fires can’t be … Read more