Mini Review: Implementing Gas Sensors in Battery Management Systems for Determining Battery Lifespan

Lithium-ion (Li-ion) battery technology improvements have enabled their widespread use in various applications, ranging from portable electronics to electric vehicles. One major challenge is ensuring the safety and reliability of batteries, especially regarding the thermal runaway risks that can happen due to internal damage or degradation. The current article discusses the feasibility and potential applications of incorporating gas sensors within battery packs as a preliminary detection mechanism for monitoring and identifying potential failures before they escalate into catastrophic events. Gas sensors allow for the detection of certain volatile gases released from battery constituent materials upon degradation, such as carbon dioxide (CO₂), carbon monoxide (CO), hydrogen (H₂), and volatile organic compounds (VOCs). Gas sensors can help detect such abnormal conditions by continuously monitoring these gases and providing an early warning, thus preventing more significant damage. Gas Sensors Operating Principle: This review article provides an overview of the operating principles of gas sensors, focusing on the selective detection of target gases based on chemical reactions and electrochemical, pelletized, or semiconductor-based sensing technologies. The paper further details the value of using gas sensors in battery management systems (BMS), offering the potential for improved battery safety, validated operational lifetime, and a more proactive approach to battery health monitoring. The difficulties in making it available for real-world applications, such as the durability of the sensor, the accuracy under conditions used in practice, and its inclusion in existing BMS frameworks, are also highlighted. From gas sensors that help monitor the chemical composition of the battery to the modification of standard Li-ion cells for practical usage, the integration of complementary and interdependent technologies could enhance the safety and reliability of batteries, ultimately increasing their practical cycle life while reducing downtime and the risk of safety hazards. Gas sensors used for real-time monitoring and early recognition of danger zones represent a promising development in better battery technology with increased practical applicability of Li-ion batteries in vessels and a wide range of industrial sectors.