The shape of an electric tricycle battery is primarily determined by the battery type and the structural design of the vehicle itself. Currently, common battery shapes can be broadly categorized into three types: square blocks, elongated modular assemblies, and custom-designed modular structures.
Lead-acid batteries typically utilize a square or rectangular prismatic cell design; each individual unit operates at 12V, and multiple units are connected in series to form a complete battery pack. While this structural shape is relatively regular, it is characterized by its large volume and heavy weight; consequently, it requires a dedicated battery compartment for secure mounting and is commonly found in traditional electric tricycles.
Lithium batteries, conversely, offer greater flexibility in terms of shape, frequently appearing as elongated bars, flat rectangular units, or modular assemblies. Given their higher energy density, lithium batteries allow for customized designs based on specific cell arrangements, making them easier to adapt to the chassis space constraints of various vehicle models. Some electric tricycles even employ "non-standard custom battery packs"-uniquely shaped designs tailored to the specific dimensions of the vehicle frame-to maximize space utilization.
In certain high-end or specialized electric tricycles, an integrated battery module structure is adopted. This design encapsulates multiple individual battery cells within a single, unified housing, resulting in a more compact overall form while simultaneously enhancing vibration resistance and protective capabilities. This structure not only optimizes space efficiency but also improves the battery's stability and safety when operating under complex road conditions.