Why don't electric vehicles use pouch batteries?

[LaViolet]

Electric vehicles do not use pouch batteries for the following reasons: 1. High cost: Currently, pouch batteries have relatively high costs, with the aluminum-plastic film in raw materials relying on imports, resulting in higher material costs. 2. Low production efficiency: Most processes adopt lamination techniques, leading to lower production efficiency. Relevant information about electric vehicles is as follows: 1. Electric vehicle (EV): Refers to automobiles that use electrical energy as the power source and are driven by electric motors, belonging to the category of new energy vehicles. 2. Classification: Includes Battery Electric Vehicles (BEV), Hybrid Electric Vehicles (HEV), and Fuel Cell Electric Vehicles (FCEV).

[LeCecilia]

I've noticed that electric vehicles rarely use pouch-type batteries, primarily due to critical safety and heat dissipation concerns during high-speed operation. The soft, flimsy casing of pouch cells lacks rigid protection, making them prone to deformation or even catching fire in collisions or compression scenarios—posing significantly higher risks compared to prismatic or cylindrical batteries. As someone who frequently researches batteries, I know EVs require handling high-power charge/discharge cycles. Pouch cells' inferior heat dissipation efficiency leads to heat accumulation that degrades battery lifespan, especially during summer long-distance drives. Coupled with lower production encapsulation efficiency and bulkier space requirements, manufacturers naturally prioritize more stable alternatives. Additionally, pouch cells exhibit faster performance degradation under repeated cycling, making them unsuitable for automotive-grade high-intensity demands. Contemporary EV batteries like CATL's prismatic designs integrate more reliable cooling systems. Ultimately, the 'safety-first' principle applies here—engineers prioritize reliability, leaving pouch cells out of contention.

[SanNorah]

From a car buyer's perspective, why don't electric vehicles use pouch batteries? They're common in smartphones and laptops—lightweight and cheap—but cars are different. Safety is a major concern: pouch batteries are prone to damage, and the risk of leakage or fire increases significantly if the car encounters bumps or minor accidents on the road—just thinking about it is scary. Then there's durability. EVs are driven daily with frequent acceleration and braking, and pouch batteries have a shorter lifespan, often failing within a few years, leading to high repair and replacement costs. Manufacturers prefer cylindrical batteries, like those used by Tesla, which are structurally robust, easier to package, and more space-efficient, ultimately lowering costs. For consumers, stable power supply is key, and pouch batteries exhibit inconsistent performance under high temperature variations. Battery technology is advancing rapidly, and future optimizations might make them viable, but for now, mainstream automakers avoid them.

[LeKaden]

The reason why electric vehicles generally do not use pouch cells can be attributed to insufficient reliability. Pouch cells lack rigid support, making them fragile and prone to damage under vibration and impact, while automotive environments demand high strength. Their weak heat dissipation capability leads to overheating when densely assembled, affecting output stability. The industry prefers prismatic cells, which can integrate cooling systems to reduce failures. Pouch cells perform acceptably in other fields but are phased out in high-demand vehicles. Cost-wise, complex packaging leads to waste, prompting automakers to choose more economical options.