Non-welded battery module using anisotropic conductive film

Thermal-damage-free multi-layer electrode connection module based on staggered ACF bonding

This technology replaces the high-temperature welding methods traditionally used for electrical connection and stacking of battery electrodes with Anisotropic Conductive Film (ACF), utilizing a staggered arrangement and metal plate/particle support structures to achieve series or parallel connections.

Conventional high-temperature, high-voltage welding used in battery module assembly imposes thermal stress on batteries, reducing their lifespan and stability. Furthermore, it presents potential safety risks during the manufacturing process.

This technology eliminates the need for welding by placing an ACF containing conductive particles and particle supports at the battery electrode connection points. It ensures structural stability by using a staggered film structure between the first and second electrode layers, along with additional metal plates and insulating spacers to selectively form series or parallel connections. It can be applied to heat-sensitive pouch cell modules, stacked batteries for small wearable devices, and research or prototype battery packs that require frequent reassembly, allowing module assembly to be completed solely through film bonding without the need for welding equipment.

‍

‍

Key Features:

• A first anisotropic conductive film that connects the first-layer battery electrodes arranged in a row in pairs
• A second anisotropic conductive film that connects the second-layer battery electrodes arranged above the first-layer electrodes in pairs, positioned in a staggered arrangement relative to the first film
• A third anisotropic conductive film bonded between the first-layer and second-layer battery electrodes, containing particle supports
• An insulating spacer placed on the metal plate above the lower film, parallel to the upper film, to implement parallel connections between electrodes

‍