Specify the cell, not only the size
18650 identifies a form factor. Chemistry, rated capacity, current limits and manufacturer documentation still matter.
ENGINEERING BRIEF
Good requirements make better decisions.
Jetray’s corporate website describes cell selection, BMS design, prototyping and custom pack services. Use this brief to discuss the scope and feasibility of your own project.
From requirements to review
Make the important interfaces explicit.
Explore 18650 pack configurations for compact equipment. Cell selection, current demand and the pack layout all belong in the same engineering conversation.
Photograph from the Jetray corporate factory page.
Review the pack structure
Series and parallel arrangements affect the operating voltage, capacity and protection architecture.
Approve a representative sample
Check the fit, runtime and load behavior using production-representative equipment and agreed test conditions.
A practical project brief
What to share with the engineering team.
Electrical
Nominal system voltage, allowable input window, continuous current, peak current and peak duration.
Mechanical
Available envelope, fixing points, weight constraints, cable routing, connector and polarity.
Charging & communication
Charger model, charging opportunities, temperature sensing and required BMS or communication signals.
Project & documentation
Intended use, target markets, sample quantities, forecast volume, required test evidence and revision controls.
Project review stages
Keep the decisions and the documents together.
Use these review gates to organize a project discussion with the supplier. The agreed scope and deliverables are confirmed for the individual project.
| Stage | Information to align | Decision to record |
|---|---|---|
| Requirements brief | Exact cell model, series/parallel arrangement and measured load; Cell retention, equipment heat and service access | The equipment needs, mandatory limits and open questions. |
| Configuration review | Keep the selected cell model, series/parallel layout, protection and interconnect details together in the controlled specification. | The proposed model or design scope, interface drawing and document revision. |
| Sample evaluation | Representative equipment, operating cycle and acceptance procedure. | Results, deviations and changes needed before the next stage. |
| Order preparation | The approved configuration, quantity, packaging and required shipment documents. | The purchase specification, acceptance method and agreed commercial terms. |
A useful conversation starts with a specification
Tell us what your equipment needs.
Share the load, dimensions and intended use. Ask for a current model specification and a project review.