Pouch cells, also known as soft pack batteries, are the slim, flexible lithium batteries found in smartphones, tablets, laptops, power banks, and increasingly in electric vehicles and energy storage systems. Their lightweight aluminum-plastic film casing makes them popular with device makers, but it also makes them one of the more demanding feedstocks for a recycling line. Unlike cylindrical or prismatic cells with rigid steel or aluminum shells, a pouch cell has no protective metal housing, so it behaves very differently inside a crusher. This article explains how li-ion battery breaking and separating equipment is designed to process pouch cells safely and recover the valuable materials inside them.
Why pouch cells need special handling
Pouch cells create a different set of challenges than hard-shell batteries during recycling:
- No rigid shell. The soft aluminum-plastic pouch gives the cell almost no mechanical protection, so it deforms and tears easily under pressure rather than cracking cleanly like a metal casing.
- Flammable electrolyte. The liquid inside contains volatile organic solvents. Once the pouch is punctured, these vapors can ignite if they meet oxygen and a heat source.
- Residual charge. A pouch cell that still holds charge can short-circuit internally when damaged, driving temperatures up quickly and risking thermal runaway.
- Thin foils mixed with film. The cathode and anode materials sit on thin aluminum and copper foils, separated by plastic film, so the valuable powder is tightly bound to lightweight metals and plastics that must be separated later.
Step by step: how breaking and separating equipment processes pouch cells
Step 1: Discharging. Before any mechanical processing, pouch cells are discharged to remove residual charge. A complete lithium battery recycling plant starts with a discharging step that brings the cells down to a safe voltage level, which dramatically reduces the risk of thermal runaway and fire during crushing.
Step 2: Pre-crushing under an inert atmosphere. The discharged cells are fed into a pre-crusher or shredder. For pouch cells, the crushing chamber is kept under an inert atmosphere, usually nitrogen, to displace oxygen. This matters because a punctured pouch can release flammable electrolyte vapor, and an oxygen-free environment prevents it from igniting. Low-speed, high-torque blades tear the pouch open gradually rather than smashing it violently, which keeps heat generation under control.
Step 3: Secondary crushing and granulation. After pre-crushing, the material moves to a secondary crusher or granulator that reduces it to a consistent particle size. This stage liberates the cathode and anode materials from the aluminum and copper foils, preparing the mixture for separation.
Step 4: Magnetic separation. A magnetic separator pulls out iron and steel fragments, such as cell tabs, busbars, and any steel parts that came in with the feed, so they do not contaminate the downstream products.
Step 5: Black mass separation. The crushed material is then screened and classified. Black mass, the fine powder containing lithium, nickel, cobalt, manganese, and graphite from the cathode and anode, is separated from the coarser foils and plastics using vibrating screens, airflow separation, and sometimes gravity separation. This is the most valuable output of the line.
Step 6: Copper and aluminum recovery. The remaining stream is further separated to recover copper foil and aluminum foil as clean granules. Airflow and density-based separation sort these metals from the plastic separator film, which is collected separately.
Step 7: Dust and gas control. Throughout the process, an air pollution control system captures dust and neutralizes any harmful gases before they are released. Pulse bag dust collectors and gas treatment units keep the plant compliant with environmental requirements and safe for operators.
What comes out the other end
From a mixed pile of pouch cells, a breaking and separating line recovers:
- Black mass (lithium, nickel, cobalt, manganese, graphite)
- Copper granules
- Aluminum granules
- Iron and steel
- Plastic separator film
Choosing the right equipment
Not every crusher is suited to pouch cells. When evaluating li battery recycling equipment, look for a line that includes:
- Inert atmosphere protection in the crushing chamber
- Temperature monitoring with automatic shutdown interlocks
- A complete process: discharging, pre-crushing, secondary granulation, magnetic separation, and black powder separation
- Integrated dust collection and gas treatment
- Custom design matched to your capacity and battery mix
Conclusion
Pouch cells are here to stay, and so is the need to recycle them safely. The right breaking and separating equipment turns a challenging, hazardous feedstock into clean, saleable materials (black mass, copper, aluminum, and plastic) while protecting operators and the environment. If you are planning a lithium battery recycling project, work with a supplier who understands how each battery format behaves in the line.
