CATL marked a milestone in energy storage innovation at its "Real Energy" 2025 Technology Day with the launch of its mass-produced 587Ah lithium iron phosphate (LiFePO4) energy storage cell. The breakthrough product redefines industry standards for large-capacity energy storage, combining cutting-edge technology with real-world reliability, safety, and efficiency.

A New Era for Energy Storage Performance

CATL’s 587Ah cell represents a paradigm shift in energy storage design, prioritising holistic optimisation over mere capacity expansion. After three years of rigorous development, the cell achieves an unprecedented balance of compliance, system integration, and electrochemical performance.

• ● System-Level Efficiency: Engineered for 20-foot containers and 1500V systems, the design slashes component counts from 30,000 to 18,000 while adhering to 45-ton transport limits, streamlining deployment and reducing costs.

• ● Unmatched Metrics: The cell delivers superior energy density (434Wh/L, a 10% increase over previous generations), 96.5% round-trip efficiency (RTE), and a 5% boost in lifecycle return on investment (ROI).

• ● Manufacturing Excellence: CATL’s production process ensures PPB-level defect rates, 7.5 sigma quality control, 50% faster output, and 57% lower carbon emissions compared to conventional methods.

Three Pillars of Real Value

CATL emphasises that true energy storage solutions must deliver tangible benefits across performance, safety, and reliability. The 587Ah cell exemplifies this philosophy through groundbreaking advancements:

1. True Performance

• ● Material Innovation: A revamped LiFePO4 cathode and proprietary electrolyte system elevate energy density by 10% at the cell level and 25% at the system level.

• ● Longevity: The cell integrates self-healing anionic electrolytes and multi-functional film-forming additives, enabling a verifiable ultra-long lifespan.

2. True Safety

• ● 3D Defence System: A combination of flame-retardant electrolytes, non-diffusing anodes, and heat-resistant separators ensures zero fire or explosion incidents under extreme conditions, including overcharge, thermal runaway, and nail penetration tests.

• ● Certified Compliance: The cell meets stringent national standards (GB/T 36276, GB 44240), underscoring its robustness for global deployment.

3. True Reliability

• ● Self-Discharge Mitigation: Innovative materials and structural designs address traditional lithium battery limitations, reducing fault rates to levels an order of magnitude lower than stacked battery alternatives.

• ● Precision Manufacturing: Advanced data forecasting and production controls guarantee consistent performance across large-scale deployments.

CATL Legacy of Leadership

With over 256 GWh of energy storage systems deployed in more than 1,000 projects worldwide—and a flawless safety record—CATL has consistently driven industry evolution. The CATL 280Ah LiFePO4 cell and 314Ah cells previously set benchmarks, and the 587Ah model now raises the bar further, aligning with global demand for high-value, policy-driven energy storage solutions.

As the energy sector transitions toward sustainable and scalable storage, CATL’s 587Ah cell positions the company at the forefront of this transformation. By marrying technological innovation with real-world applicability, CATL reaffirms its commitment to powering a cleaner, more efficient energy future.