Blade Battery Technology

A blade battery is a structural innovation of the Lithium Iron Phosphate (LFP) battery. The battery cells are designed in a long, thin blade shape, hence the name "blade battery".  While the blade battery retains the core characteristics of a traditional prismatic cell, it features a more elongated and slim design. The dimensions may vary slightly depending on the model.

The operating principle of a blade battery is similar to that of conventional lithium-ion batteries. during charging, lithium ions move from the positive electrode through the electrolyte to the negative electrode while releasing electrons. The discharge process is the reverse. The unique design of the blade battery allows lithium ions to move more quickly, enhancing both charge and discharge speeds and efficiency. This is consistent with the basic operating principle of all lithium-ion batteries, while the main innovation of the blade battery lies in its structural breakthrough.

The blade battery pack adopts a CTP (Cell-to-Pack) design, bypassing the need for traditional battery modules. Due to the change in cell structure, the battery pack design is also altered. The traditional casing is eliminated, with the blade cells themselves acting as the structural beams and energy storage units. The pack design uses a honeycomb aluminum plate, with two high-strength aluminum plates attached to the top and bottom, with blade cells arranged in between. This design eliminates the need for traditional modules, improving space efficiency and allowing more cells to fit within the same volume.

• Cost Efficiency and Energy Density: The blade battery eliminates the module design, reducing the number of secondary components by 40%. This not only significantly lowers material costs but also boosts the volumetric energy density of the battery pack.
• Structural Efficiency: Unlike traditional batteries that are wound, blade batteries use a stacked design. Compared to the wound structure, the stacked design provides more uniform current density and superior internal heat dissipation, making it more suitable for high-power discharge. As a result, blade batteries exhibit better cycle performance, safety characteristics, and energy density.

The blade battery’s greatest strength is its safety. After structural optimization, it can withstand the most demanding puncture tests without catching fire or exploding, meeting national safety standards.

Puncture tests are considered the most rigorous for power batteries. Even widely used ternary lithium batteries in electric vehicles have not passed these tests. However, blade batteries, when punctured, do not ignite or emit smoke, and the surface temperature remains between 30–60°C.

Additionally, under extreme weight tests, a 46-ton fully-loaded truck was able to crush the blade battery pack without causing leakage, deformation, or smoke. After this test, the battery pack was still functional when reinstalled in the vehicle. These extreme testing conditions demonstrate the blade battery's high safety and strength performance.

Blade batteries support over 5,000 charge and discharge cycles, with the accumulated mileage far exceeding the vehicle's expected service life.