How to Prepare a Custom Battery Pack RFQ
Prepare a custom battery pack RFQ with application, voltage, capacity, current, runtime, envelope, BMS, connector, charger, environment, certification, validation, and quantity inputs.
A useful battery RFQ is an engineering brief, not only a voltage and capacity request. Clear inputs reduce incorrect cell selection, repeated mechanical revisions, BMS protocol mismatch, charger problems, and quotation assumptions.
Direct answer
Treat the RFQ as an engineering brief: application and duty cycle, voltage window, continuous vs peak current, envelope, BMS, connector, charger, environment, certification market, validation, and quantity—not voltage and Ah alone.
1. Describe the equipment and duty cycle
State what the equipment does, how long it operates, how often current peaks occur, how it charges, and how the battery is installed or replaced.
- Equipment type
- Operating and idle time
- Runtime target
- Charging and service method
2. Provide electrical requirements
Provide the operating voltage window, not only a nominal voltage. Separate continuous and peak current and include pulse duration, regeneration, cutoff behavior, and charger information.
- Voltage window
- Capacity or runtime
- Continuous current
- Peak current and duration
- Charger voltage and current
3. Define mechanical and interface boundaries
Share a drawing or maximum envelope, weight limit, mounting points, connector location, cable length, service access, enclosure target, and any shock or vibration conditions.
- Maximum dimensions
- Weight limit
- Mounting orientation
- Connector and pinout
- Harness path
- Enclosure and sealing target
4. Confirm BMS, validation, and commercial inputs
Define protection, SOC, communication, charger handshake, fault behavior, target market, required tests, document scope, sample quantity, annual volume, and the maturity of existing drawings or specifications.
- CAN / RS485 / SMBus
- Protection thresholds
- Target certification market
- Validation plan
- Sample and annual quantity
- Custom OEM or assembly-only scope
5. What missing fields force quotation assumptions
If peak current, envelope, BMS protocol, charger behavior, or certification market is missing, the quote can only assume planning bands and may change after drawings and logs arrive. Missing maturity (design vs approved drawings) also decides whether the next step is Custom OEM or assembly service.
- No peak / pulse data → current and thermal assumptions
- No envelope / weight → structure and cell-format assumptions
- No protocol docs → communication assumptions
- No market / docs → certification and shipment assumptions
Engineering inputs
Complete custom battery RFQ fields
Related products and applications
Continue to the relevant product and engineering pages.
Custom OEM battery design
Design entry when cells, architecture, BMS, enclosure, or validation still need joint development.
Open Custom OEM battery design →Battery pack assembly service
Controlled assembly when approved cells, architecture, drawings, and test requirements are ready.
Open Battery pack assembly service →Manufacturing process and quality
Incoming inspection, matching, assembly, BMS integration, testing, and traceability.
Open Manufacturing process and quality →FAQ
Custom Battery Pack RFQ Preparation Checklist | Staricell
Can a custom battery pack be quoted with only voltage and capacity?
Only a rough assumption may be possible. Current, runtime, envelope, weight, BMS, connector, charger, environment, certification, validation, and quantity are needed for a meaningful engineering quotation.
What happens if the RFQ omits peak current or protocol documents?
The team can only quote planning assumptions for current, thermal rise, harness, and communication. Those assumptions must be re-confirmed after logs, drawings, and protocol files arrive—before locking cells or BMS firmware.
Which project stage fits assembly service vs. custom design?
Choose assembly when the cell, series-parallel architecture, BMS, enclosure, connector, drawings, and tests are ready for controlled production. Choose custom design when those decisions still need engineering development.