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source:Industry News release time:2025-07-10 Hits: Popular:AG11 battery
The second-life utilization of liquid lithium-ion batteries refers to the practice of reusing retired batteries from electric vehicles (EVs) or consumer electronics in lower-demand applications after their primary service life. This approach maximizes the value of lithium-ion batteries by extending their functional lifecycle, reducing environmental impact, and lowering energy storage costs.
Liquid lithium-ion batteries, typically using liquid electrolytes, retain significant residual capacity (often 60–80% of original capacity) when retired from EVs due to performance degradation. Instead of immediate recycling, these batteries can be repurposed for stationary energy storage systems (e.g., grid storage, renewable energy buffering), backup power supplies, or low-speed electric vehicles. Key steps in second-life utilization include battery health assessment, reconditioning, and system integration:
Health Assessment: Non-destructive testing (e.g., electrochemical impedance spectroscopy, voltage/capacity profiling) evaluates cell integrity, identifying usable modules while discarding faulty units.
Reconditioning: Cells are sorted, rebalanced, and repackaged into new battery packs with customized battery management systems (BMS) to adapt to the target application’s voltage and current requirements.
System Integration: Retrofitted batteries are integrated into new systems with safety features (e.g., thermal management, overcharge protection) to ensure reliability.
Benefits of second-life utilization include:
Cost Efficiency: Second-life batteries offer a 30–50% cost reduction compared to new batteries for stationary storage, making renewable energy grids more affordable.
Environmental Sustainability: Extending battery life reduces raw material demand (e.g., lithium, cobalt) and minimizes e-waste. For example, a single EV battery can power a household’s energy storage system for 5–8 years post-vehicle use.
Grid Stability: Repurposed batteries store excess solar/wind energy, mitigating intermittency issues and enhancing grid resilience.
Challenges include standardized testing protocols, safety concerns from degraded cells, and commercial viability due to fragmented supply chains. However, with advancements in AI-driven battery diagnostics and policy support (e.g., EU Battery Regulation promoting second-life use), this field is gaining traction.
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