Mobile system shreds lithium-ion batteries onsite, stabilizes them for transport

As the volume of end-of-life lithium-ion batteries continues to grow, safely transporting damaged or spent battery packs has become one of the industry's biggest challenges. Shipping costs continue to rise, hazardous material requirements add complexity, and concerns over thermal events remain a significant liability for recyclers, utilities, insurers, and processors.

John Neuens, industrial consultant at BCA Industries, has spent years evaluating how these challenges can be addressed before batteries ever leave the collection site. BCA provides complete custom recycling systems for complex industrial and commercial applications. 

Rather than focusing solely on improving transportation practices, the company began exploring whether batteries could instead be processed into a substantially inert material on-site, reducing both safety risks and the regulatory burden associated with moving hazardous battery packs.

"The biggest problem with transporting lithium-ion batteries isn't simply the cost or the fact that they are regulated as hazardous material. The real issue is that they are inherently dangerous to move," explains Neuens. "The EPA and DOT have held numerous meetings and issued guidance on possible approaches, and they regularly attend lithium-ion battery recycling conferences to provide updates. The discussion continues, but the transportation problem has not really been solved."

Those discussions extended well beyond recycling companies. Neuens says BCA met with insurance providers involved in lithium-ion recycling operations, processors, and cleanup projects to better understand where the industry's greatest exposure exists. A consistent theme emerged: insurers were far more interested in eliminating transportation risk than simply managing it. 

"Those conversations made it clear they were very interested in a system that could take batteries to a relatively inert state before transportation," says Neuens. "If the material can be stabilized onsite, it becomes much safer to ship and may even qualify for shipment as non-hazardous material, depending on the circumstances."

He adds that in many cases, recycling facilities are not located close to where batteries reach end of life. Instead of transporting large volumes of batteries long distances, a mobile recycling system can be brought directly to the batteries. That not only shortens the chain of custody but also reduces liability by eliminating multiple handling and transportation steps where problems are more likely to occur.

Those conversations ultimately led BCA to begin designing a portable version of its battery recycling technology. Rather than replicating a full-scale processing facility, the mobile platform incorporates the critical components required to safely shred batteries, recover valuable black mass, and prepare the remaining material for transportation without the complexity of a permanent installation.

"Customers are understandably concerned about processing batteries indoors. A portable system removes much of that concern while also reducing some of the permitting issues associated with permanent installations," says Neuens.

BCA's on-site battery processing system safely recovers critical materials 

The system is designed around two semi-trailers. One houses the shredding and material handling equipment, while the second contains the water treatment and filtration systems that separate recovered black mass from the remaining materials.

BCA packages the recovered material in steel drums rather than bulk bags, allowing the material to stabilize before shipment and providing additional assurance that no residual chemical reactions remain active.

Because many temporary processing locations cannot discharge contaminated process water, BCA also developed a water treatment approach that allows wastewater to be collected and processed through an environmental services partner rather than released onsite. 

From a technical standpoint, the portable system relies on many of the same core engineering principles used in the company's larger recycling plants. The batteries are shredded within a sealed nitrogen and water environment, while agitation and controlled water separation recover black mass without excessively reducing the remaining materials into fine particles. 

An inert nitrogen environment can help prevent thermal runaway by substantially reducing the available oxygen concentration, which is crucial for combustion and the propagation of a fire within a battery experiencing thermal runaway. This can effectively "smother" the reaction and prevent it from escalating further.

Although the mobile platform simplifies the overall process, it captures approximately half of the available high-purity black mass during initial processing. That material can be sold directly into established recycling markets or through specialty brokers, providing operators with an immediate revenue stream while substantially reducing transportation hazards.

"Most industry professionals have come to realize that the economics of recycling lie not just in metal separation, but in recovering black mass," says Neuens. "Black mass after filtration to pCAM [a precursor cathode active material] can go right back into new battery production or into new products and applications, which is why it has value. Almost all the value is in the lithium and the black mass."

Recovered inert material is then transported to licensed downstream processors for additional refinement and purification. By converting batteries into a more stable material before transportation, BCA believes many of today's logistical and insurance challenges can be reduced significantly.

The first deployment is expected to support cleanup work involving large quantities of lithium-ion battery packs. While the system can process multiple battery chemistries and formats, including pouch cells, cylindrical cells, and modules, Neuens notes that each presents different operational challenges. Pouch cells, for example, generally produce higher black mass recovery but also require greater attention because of their increased chemical reactivity during processing.

The system can be configured to accommodate these variations, allowing processing parameters to be adjusted for different battery chemistries and form factors while maintaining safe, consistent, and efficient operation.

Neuens believes mobile processing represents the logical next step for large segments of the battery recycling industry. Processing batteries as close as possible to where they are stored reduces transportation exposure, shortens liability chains, and allows cleanup projects to begin without waiting for permanent processing capacity to become available.

Although permanent battery recycling facilities will continue to play a central role, Neuens envisions portable processing systems providing an additional option for utilities, battery collectors, cleanup contractors, and organizations managing large inventories of end-of-life lithium-ion batteries.