What Technical Data to Prepare Before Custom Low-Voltage E-Powertrain Development

2026-08-29

Shenzhen Jinhaixin Holdings Co., Ltd outlines the key technical documents, parameters, and application details B2B buyers should prepare before starting a custom low-voltage e-powertrain (motor, controller, battery) development project—improving requirement clarity, supplier communication efficiency, and solution fit.

Custom low-voltage e-powertrain projects (typically combining a motor, drive controller, and battery pack) move faster and fit better when requirements are clear from day one. This page provides a practical technical information checklist for B2B teams to prepare before starting a custom development discussion—helping reduce back-and-forth and improve solution matching.

Who this checklist is for: product managers, R&D, purchasing, and engineering teams preparing to communicate requirements to a supplier.
Brand context: Shenzhen Jinhaixin Holdings Co., Ltd provides low-voltage e-powertrain design and customization services, including BLDC hub motors, drive controllers, and energy battery packs.

1) Project & Application Scenario (Start Here)

A concise scenario definition prevents parameter mismatches later. Share as much as is known—even preliminary assumptions are useful if labeled as “target” or “TBD”.

End product type: e-bike / scooter / AGV / small EV / industrial equipment / other low-voltage platform.
Use environment: indoor/outdoor, dust/water exposure, salt fog, altitude, temperature range, storage conditions.
Duty profile: typical route or task cycle, start-stop frequency, continuous run time, peak events.
Key loads & constraints: payload, slope grade, target speed range, available installation space.
Target timeline: sample dates, pilot build, mass production window, expected annual volume (if available).

2) Performance Targets (What “Good” Looks Like)

Vehicle / System-Level Targets

Speed & acceleration targets (with load condition stated).
Gradeability (e.g., sustained slope %, distance/time).
Range / energy consumption expectation (test method or assumptions if any).
Noise & ride feel requirements (if relevant).

Critical Notes for Clear Targeting

Separate continuous vs peak requirements (power/torque/current).
State test conditions: ambient temperature, load, tire size, gearing (if any), battery SOC window.
If targets are “must-have” vs “nice-to-have”, label them to speed trade-off decisions.

3) Electrical Architecture & Interfaces

Provide the planned electrical architecture so the motor, controller, and battery pack can be matched as a system.

Module	Information to Prepare
Battery pack	Target voltage class (nominal/min/max), capacity target, peak/continuous discharge current, charge method, BMS needs (protections, balancing), connector type, fuse strategy, packaging constraints.
Drive controller	Supply voltage range, phase current limits, control method/inputs (throttle, torque request, speed request), communication interface needs (if applicable), regen strategy (if needed), sensor compatibility.
Motor (BLDC hub or other)	Rated/peak power targets, speed range, torque requirement, sensor type (Hall/sensorless), phase wiring, insulation expectations, temperature sensing needs.
System wiring	Harness layout constraints, connector preferences, cable length limits, EMC considerations, grounding strategy, serviceability requirements.

Tip: If you already have a preliminary wiring diagram, interface control document (ICD), or connector list, sharing it early can significantly improve communication efficiency.

4) Mechanical Constraints & Installation Requirements

Mechanical fit and thermal margins are common sources of redesign. Provide dimensional boundaries and integration constraints up front.

Envelope & mounting: available space, mounting points, axle/dropout details (for hub motors), tolerance expectations.
Mass targets: any weight limits by module or for total system.
Cooling approach: natural convection / airflow / conduction to chassis; any sealed enclosure constraints.
Ingress protection expectation: exposure to rain, washdown, mud; sealing and venting preferences.
Noise & vibration: constraints, expected vibration profile, mounting isolation needs.

5) Operating Conditions & Reliability Expectations

Temperature range: operating and storage; hot start / cold start requirements.
Humidity / corrosion conditions: coastal use, salt spray risk, chemicals.
Lifetime expectation: duty cycles, working hours, maintenance intervals (if defined).
Failure mode concerns: what must be prevented (e.g., thermal runaway risk management via BMS protections, stall protection behavior, over-current limits).

6) Compliance, Safety & Documentation Needs

Specify your target market(s) and any internal standards so the development path aligns with compliance and procurement requirements.

Target sales regions/markets: where the end product will be sold or deployed.
Required safety features: electrical protections, isolation strategy, charging protections, mechanical guarding.
Required deliverables: drawings, BOM, test reports, interface documents, labeling requirements, packaging specifications.
Change control: expectations for revision tracking and approval steps (helpful for stable supply).

Note: Compliance requirements vary by industry and destination. Providing the intended application and market early allows the supplier to recommend an appropriate verification plan without over-design.

7) Validation Plan (How You Will Evaluate Samples)

Align on validation methods before prototypes are built. Even a simple plan helps prevent misunderstandings about “pass/fail”.

Bench tests: no-load, load points, efficiency mapping, controller protection behavior, BMS protection checks.
Thermal checks: continuous operation at representative loads, hotspot monitoring, derating logic (if required).
Integration tests: harness fit, connectors, mechanical clearances, assembly process.
Field trials: real duty cycle verification, user experience feedback, fault log collection method.
Acceptance criteria: what metrics must be met, what deviations are acceptable, and what triggers redesign.

8) What to Send to Start Efficient Supplier Communication

Recommended Package (Minimum)

Scenario description + duty profile
Performance targets (continuous vs peak)
Voltage/current assumptions + preferred charging approach
Mechanical envelope + mounting constraints
Any non-negotiable compliance or documentation requirements

Helpful Attachments (If Available)

Sketches/CAD outlines, mounting drawings, connector photos
Existing system BOM or component references (for compatibility discussion)
Test expectations or internal spec sheets
Known issues from previous versions (to avoid repeating pitfalls)

Working with Shenzhen Jinhaixin: Customization Scope (Low-Voltage Three-Electric System)

As an integrated design, R&D, customization, manufacturing, and sales company, Shenzhen Jinhaixin Holdings Co., Ltd supports B2B customers across the key low-voltage e-powertrain modules: BLDC hub motors, drive controllers, and energy battery packs. By aligning technical data early, both sides can focus on engineering trade-offs and integration details instead of repeated clarification.

If you are preparing a custom development inquiry, consider organizing your information using the sections above. A structured requirement package typically enables faster feasibility review, clearer quotation scope, and smoother prototype validation planning.