Case Study: Energy-Storage Box Painting Line, East China
Summary
An energy-storage box painting line for a manufacturer of boxes for battery storage systems in East China, comprising surface preparation, container-scale paint booths for primer and topcoat, drying and forced cooling, a transfer system between stations and exhaust with VOC treatment. Boxes move between stations so each follows the same sequence and receives the same film build. The line is in production in 2026.
Project Background
The client builds energy-storage boxes for battery storage systems. MUSI supplied its energy-storage box painting line.
The Challenge
An energy-storage box stands outdoors for the whole service life of the batteries inside it. The paint has to protect the steel against sun, rain and corrosion for years, every seam and door frame has to be covered, and output has to keep up with fast-growing storage demand.
MUSI's Solution
MUSI supplied a painting line sized for energy-storage boxes: surface preparation, container-scale paint booths for primer and topcoat, drying and forced cooling, and exhaust treatment, with boxes moved between stations so each one follows the same sequence and receives the same film build.
Equipment Scope
- Surface preparation
- Container-scale paint booths for primer and topcoat
- Drying and forced cooling
- Transfer system between stations
- Exhaust and VOC treatment
Results
The line paints energy-storage boxes for the client’s storage products.
Selection logic: why this configuration
Container-scale booths with lifting work platforms were chosen so operators reach the top and the door areas of a 20-ft box without scaffolding, and a transfer system between fixed stations was preferred to a continuous chain at the client's volume. Drying with forced cooling after each coat keeps the takt short between primer and topcoat.
Scope of supply and key components
| Item | Specification | Notes |
|---|---|---|
| Surface preparation | ||
| Paint booths | Container-scale, lifting work platforms | |
| Drying | Drying and forced cooling | |
| Transfer system | Between stations | |
| Exhaust and VOC treatment |
Key components
Key components are available from international brands, configurable per customer specification, so that spare parts can be sourced locally over the life of the line. Brand names below are the usual options for this type of equipment; the brands actually fitted are fixed in the contract specification.
| Component | Brands available on request |
|---|---|
| Automatic liquid guns, pumps and 2K proportioners | Graco ProMix 2KS, Sames Airmix, WAGNER AirCoat, Nordson, Binks (Carlisle Fluid Technologies) |
| Oven and dryer gas burners | Riello RS series, Weishaupt monarch WM-G, Baltur TBG, Honeywell Maxon OVENPAK, Eclipse |
| PLC and HMI | Siemens SIMATIC S7-1500, Mitsubishi Electric MELSEC iQ-R, Schneider Electric Modicon, OMRON NX, Rockwell Automation Allen-Bradley |
| Variable-frequency drives | ABB ACS580, Siemens SINAMICS G120, Danfoss VLT, Schneider Electric Altivar, Yaskawa, Mitsubishi Electric |
| Booth ceiling and intake filter media | Freudenberg Viledon, AAF SureStop, Camfil, MANN+HUMMEL |
| RTO ceramic media and burners | Lantec MLM, Honeywell Maxon line burners, Riello RS, Eclipse |
| Conveyor gear motors | SEW-EURODRIVE, NORD DRIVESYSTEMS, Bonfiglioli, Siemens, Sumitomo Drive Technologies |
| Sensors and temperature controllers | SICK, Pepperl+Fuchs, OMRON E5CC, Honeywell UDC, Yokogawa UT, ifm, KEYENCE |
Not included in the scope of supply
- Civil works, foundations and pits
- Building services up to the battery limit: power supply, gas, compressed air, water and drainage
- Local permits, emission approvals and third-party inspections
- Paint or powder supply, unless stated in the contract
Services included with every line: engineering design, manufacturing, shipping documentation, installation supervision, commissioning, operator training, warranty and spare parts.
Typical programme
The durations below are typical for equipment of this class and are given for planning; they are not the recorded schedule of this project. A complete line usually runs 90–180 days from contract to acceptance, a single unit 30–60 days.
| Stage | Typical duration | What happens |
|---|---|---|
| Site survey and workpiece review | 5–10 days | Remote review of drawings and photos, or an engineer visit |
| Layout and detail design | 15–30 days | Layout drawing, utilities list and specification sign-off |
| Manufacturing | 45–90 days | Booths, ovens, conveyor, pretreatment and controls built and pre-assembled at the works |
| Shipping | 20–45 days | Sea freight; equipment shipped in sections for on-site assembly |
| Installation | 15–40 days | MUSI supervision with the client's installation crew or MUSI crew |
| Commissioning, training and acceptance | 7–15 days | Trial runs on the client's parts, operator training, acceptance record |
Applicability and limits
The line is sized for the client's box dimensions and volume; the general 20-ft box line design is shown on the related energy-storage case pages. The coating system follows the box buyer's specification.
Results shown in this case study reflect the stated operating conditions and should not be interpreted as guaranteed performance under different feed, production, environmental, or site conditions.
After-sales and spare parts
Warranty on a MUSI coating line runs from acceptance: 12 months on the complete line excluding consumables, 36 months on critical components such as motors, drives and the PLC, and 60 months on structural parts such as steel structure, ducting and oven bodies. Failures within warranty, excluding misuse, are repaired free of charge.
Support starts remotely: the service line is staffed around the clock, a preliminary diagnosis with recommendations is given within 2 hours, and where a site visit is needed an engineer reaches any major city within 72 hours. A spare-parts inventory is held at the Changzhou headquarters with same-day shipping, and customers can keep a dedicated parts stock at MUSI for emergencies. Details are on the after-sales service page.
FAQ
How do operators reach the top of a 20-ft box in a booth? From lifting work platforms inside the booth, which raise the operator to the roof and upper door areas without scaffolding.
Why forced cooling after drying? So a box can go from primer drying to the topcoat booth without waiting to cool naturally, which shortens the cycle between coats.
What stations make up the line? Surface preparation, primer and topcoat booths, drying with forced cooling, a transfer system and exhaust treatment.
Is a continuous conveyor needed? Not at this client's volume; a transfer system between fixed stations keeps the sequence with less equipment.
Is the line in production? Yes, painting energy-storage boxes for the client's storage products.
Next step: a configuration proposal for a similar line
If your parts, volumes or plant conditions are close to this project, MUSI can return a line configuration and layout proposal. To prepare it we need four things:
- Photos and dimensions of the workpieces, with weight and material
- Required output (pieces per hour or per day, and shifts)
- Number of colours and how often colour changes are needed
- Available floor space and ceiling height, with the utilities on site
Message us on WhatsApp with these details, or use the quotation form.
Published 2026-09-26 · Updated 2026-09-30 · Last technical review: 2026-09-30
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Provided by Lin Cong, Technical Director, MUSI Technology