The battery is the heart of an electric vehicle. However, the generic term “lithium-ion battery” encompasses a wide range of very different technologies, each with its own characteristics, preferred applications, and long-term value potential. Understanding these differences means understanding what determines a vehicle’s actual lifespan, its reparability, and its role in a circular economy.
01 — Major chemical families: distinct profiles for distinct needs
All lithium-ion batteries share the same basic electrochemical principle. What sets them apart is the composition of their positive electrode—the cathode—which determines their performance, aging behavior, and compatibility with repair and recycling processes.
NMC | Nickel-Manganese-Cobalt — the dominant technology in the European automotive market. High energy density, mature and proven technology, deployed on a large scale by virtually all premium manufacturers. Excellent balance between performance, durability, and cost. |
LFP | Lithium Iron Phosphate — Exceptional durability and longevity, with no cobalt or nickel. LFP withstands full charge cycles and temperature fluctuations, making it the benchmark chemistry for heavy-duty applications and long service life. It is a natural choice for industrial vehicles —buses, heavy-duty trucks, and construction equipment—where the high initial investment justifies a battery designed to last well beyond the lifecycle of a passenger car. From the perspective of mineral resources,it is also the most environmentally sound approach: by eliminating the need for cobalt and nickel, it significantly reduces the strain on critical and geopolitically sensitive raw materials. |
NCA | Nickel-Cobalt-Aluminum — maximizes energy density, developed for Tesla's early high-end vehicles. Less common in newer models, having been supplanted by more recent NMC formulations. |
LTO | Lithium titanate — A niche chemical formulation offering exceptional durability (up to 20,000 cycles) and very high charging speed. Intended for professional and niche applications. |
02— Longevity: Chemistry lays the foundation; usage does the rest
A battery’s chemistry lays the foundation; usage does the rest. Two mechanisms degrade a battery : Cyclic aging,wear and tear caused by charging and discharging—is less critical than commonly believed in a fully electric vehicle (a Renault R5 has a theoretical range of 600,000 km), but it is a major concern for the small batteries in hybrid vehicles. And calendar aging,natural degradation while at rest depending on the charge level and storage temperature. It is BMS (Battery Management System) that controls the interaction between these two factors, and its quality directly determines the battery’s actual lifespan.
A battery that is used properly does not age in a linear fashion. How it is used in the early years determines its condition over time—and regularly monitoring its health allows you to anticipate issues long before any deterioration becomes noticeable.
At Circulacar, every vehicle undergoes a thorough diagnostic evaluation: cell-by-cell reading, analysis of charging history, and assessment of the actual State of Health (SOH). This precision allows us not only to intervene at the right time, but also to act with surgical precision—if a cell shows a significantly degraded state of health compared to the others, we replace it individually, without touching the rest of the pack.
03 — Circularity: The battery has many lives
A car battery is considered to have reached the end of its useful life when its capacity drops below 70 to 80 percent of its original capacity. But this threshold does not mean the end of its value—far from it.
A Second Life
A battery removed from a vehicle retains a substantial amount of energy that can be fully utilized in less demanding applications: residential or commercial stationary storage, solar systems, industrial backup power, and grid regulation. Depending on the battery’s chemistry and condition, this second life can provide an additional ten to fifteen years of use.
The market is rapidly taking shape, driven by demand for renewable energy storage and European regulatory requirements. Battery traceability—including usage history and documented health status—is becoming a key asset in this model.
Recycling
When neither repair nor repurposing is feasible, recycling comes into play. Hydroelectrochemical processes make it possible to recover lithium, cobalt, nickel, and manganese at rates that are increasing year by year. The ultimate goal is a closed-loop economy in which raw materials from recycling are used to fuel the production of new cells.
At Circulacar, our batteries are fully disassemblable.Rather than shredding the entire pack—a process that mixes materials and reduces their purity—we methodically separate each component. This approach allows us to recycle each component under optimal conditions, achieving a level of purity far superior to that obtained through conventional shredding processes.
04 — Repairability: A Challenge of Both Design and Expertise
Whether a battery can be repaired depends on two inseparable factors: how it was designed by the manufacturer, and the level of expertise of the person working on it.
From a design perspective, everything hinges on the battery pack: Can the modules be accessed without dismantling the assembly? Can individual cells be replaced? Can third-party tools read the BMS data? These design choices vary considerably from one manufacturer to another and directly determine the feasibility of maintenance work.
In terms of expertise, several skills are essential:
- Cell-by-cell diagnostics, which allow for the precise identification of the fault rather than replacing the entire battery pack.
- Cell balancing, which restores the pack’s uniformity and overall performance.
- The availability of parts —cells, connectors, sensors—and expertise in reconditioning procedures.
- The traceability of each intervention, which provides a documented history that can be leveraged throughout the remainder of the product lifecycle.
The European regulatory framework is evolving in this direction. The Battery Regulation, which will be phased in starting in 2024, establishes a mandatory digital passport for each battery, detailing its composition, health status, and usage history. This is a structural step forward that reinforces the circular economy approach and legitimizes stakeholders capable of operating with this level of precision.
05 — Our Solution: Circulacar’s Expertise at the Service of Your Batteries
At Circulacar, we start from a simple belief : the value of a battery doesn’t end with its first life..
We are involved at every stage: from battery design, through after-sales service (diagnosis and repair), to reuse for a second life—all with precision and transparency.
