Battery Manufacturing Quality Standards

Quality Is Built In — Not Inspected In

At Leolus Energy, every battery pack that leaves our facility goes through a defined quality process — from incoming cell inspection to final discharge testing before dispatch. Our drone battery customers depend on reliable power for critical operations, and our solar and ESS customers need cycle-life consistency over years. This page describes how we build for that standard.

Why this matters for your application: A battery that fails in the field isn't just a cost — it's a downed drone mid-spray operation, a solar system offline at night, or a delivery missed. We design and assemble with field failure as the outcome we are engineering against.

Our Quality Control Process

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1. Incoming Cell Inspection

Every batch of cells is received and individually tested for capacity, internal resistance, and open circuit voltage before entering production. Cells outside specification are rejected at intake — not discovered later in a completed pack.

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2. Cell Matching & Grading

Cells for each pack are matched by internal resistance and capacity within a tight tolerance band. Mismatched cells cause early capacity loss and cell imbalance — matching them at build time is fundamental to pack longevity.

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3. Controlled Assembly

Pack assembly follows documented work instructions. Connection quality, cell orientation, insulation, and mechanical structure are each verified before the BMS is installed. We do not use batch shortcuts on assembly steps.

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4. BMS Validation

Every Battery Management System is validated against protection thresholds — overcharge cutoff, over-discharge cutoff, cell balance trigger, temperature limit, and short-circuit response. BMS failure modes are tested, not assumed to pass.

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5. Charge & Discharge Test

Each completed pack undergoes a full charge-discharge cycle to verify actual capacity against rated capacity. Packs that do not meet capacity within specification are set aside for investigation and do not ship.

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6. Final Inspection & Dispatch

A completed pack is visually and electrically inspected before packaging. Pack voltage, connector integrity, labelling, and packaging protection are verified. Packs are dispatched at a storage-safe charge level (typically 50–60%).

Why Semi-Solid State Technology Raises the Quality Bar

Conventional LiPo cells use liquid electrolyte — a flammable material that creates a fundamental safety constraint at pack level. Our Nexfly series uses semi-solid state cells, which shifts the quality baseline:

Reduced thermal runaway risk: Semi-solid electrolyte dramatically reduces the flammability hazard that defines most lithium battery safety incidents. This is not a performance claim — it is a materials property of the electrolyte chemistry.
More consistent cell-to-cell performance: Semi-solid cell manufacturing produces tighter tolerance in capacity and internal resistance, which makes pack matching more precise and pack lifespan more predictable.
Better ageing characteristics: Solid electrolyte cells degrade more predictably over charge cycles than liquid electrolyte cells. This means cycle life estimates are more reliable — the pack performs close to specification for longer before capacity drop becomes operationally significant.
Mechanical stability: No liquid means no electrolyte migration under mechanical stress or vibration — relevant for drone applications where packs experience significant vibration load during every flight.

Registration & Compliance

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MSME Registered

Leolus Energy is registered under the MSME Act. This registration is relevant for government procurement, PLI-scheme drone OEM compliance, and formal supplier qualification by corporate and institutional buyers.

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Make in India — Domestic Manufacturer

Our manufacturing facility is located at Electronics City, Bangalore. All battery packs are assembled in India. This matters for government procurement rules requiring domestically manufactured components and for PLI-eligible drone OEM supply chains.

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9+ Years of Manufacturing Experience

Formerly Carbon Compass Enterprises, the company has been manufacturing lithium battery packs since 2016. That operational history informs our quality protocols — we have seen failure modes in the field and have engineered against them.

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Application-Specific Testing Protocols

Drone batteries are tested differently from solar street light batteries or ESS packs. We apply discharge profiles and stress conditions relevant to each application type. A drone battery is tested at the discharge rates it will see in the field — not at lab baseline.

For OEM Buyers — What We Can Provide

If you are qualifying Leolus Energy as an OEM supplier, the following documentation is available on request:

Cell data sheets and cell-level test reports for the specific cells used in your pack
Battery pack specifications document (voltage, capacity, dimensions, weight, thermal, BMS specifications)
BMS protection threshold documentation
MSME registration certificate
Sample packs for independent testing and evaluation before bulk order
Incoming quality control process documentation for your supplier audit

Request Quality Documentation or Samples

If you are evaluating Leolus Energy as a battery supplier for your OEM drone programme, solar project, or industrial application — contact us to request documentation, sample packs, or a technical conversation with our engineering team.

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Battery Manufacturing Quality — How We Build Every Pack