Industrial cordless power tools keep developing towards higher power and heavy-duty operation. Restricted by the physical structure of cells, conventional wound lithium batteries have obvious bottlenecks in continuous high-current output, heat control and fast charging, and cannot adapt to high-intensity, continuous working scenarios.
To tackle industry pain points, blade-structure battery packs provide product solutions. Based on the core technology of pouch blade cells, they achieve remarkable improvements in key parameters including internal resistance, discharge capacity and heat dissipation efficiency.
According to product technical documents, this battery series adopts laminated stacked cell design with prominent structural advantages over traditional wound cells. Wound cells are made of rolled electrodes, featuring high internal resistance and massive heat generation under high-current operation. Blade cells use a flat stacked structure with shorter current conduction paths. The cell internal resistance is ≤3mΩ, and the tested pack internal resistance is as low as 7.97mΩ. For reference, the internal resistance of conventional wound battery packs can reach 118mΩ, showing a dramatic performance gap.
In terms of practical performance, these blade battery packs support 0‑100% full charging within 10 minutes, deliver 100A continuous discharge, and withstand pulse discharge of 160‑200A. The low internal resistance effectively reduces heat generation during operation and mitigates power attenuation under heavy loads, suiting various harsh working environments of cordless tools.
Regarding the product portfolio, blade battery packs have formed serialized products of multiple specifications, including QZ‑21700ST‑4.0Ah and QZ‑21700ST‑8.0Ah, with capacities ranging from 4.0Ah to 8.0Ah. They can be matched with industrial cordless power tools requiring different power levels and runtimes.
Industry analysis shows competition in the lithium battery sector has shifted from simple capacity comparison to competition over fundamental cell manufacturing processes. With strengths in internal resistance, heat dissipation and discharge performance, the blade technology is expected to become a key development direction for high-power tool batteries, offering new power supply options for heavy-duty power tools and high-frequency operation scenarios.
