Case Study: Energy-Storage Box Painting Line, Jiangyin
Summary
An energy-storage box painting line for the new-energy business of an industrial group founded in 1993, based in Jiangyin, Jiangsu, which builds grid-side, commercial and industrial, and residential storage systems with its own PCS, EMS and BMS and is expanding into Europe. The line comprises surface preparation, container-scale paint booths for primer and topcoat, drying and forced cooling, a transfer system between stations and exhaust with VOC treatment. The reference configuration on this page is a current 20-ft box line design. The line is in production in 2026.
Project Background
The client, based in Jiangyin, Jiangsu, is the new-energy business of an industrial group founded in 1993. It builds energy-storage systems for grid-side, commercial and industrial, and residential use, together with its own PCS, EMS and BMS, and is expanding into Europe. 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
Reference Configuration: 20-ft Energy-Storage Box Line
The figures below come from a current 20-ft energy-storage box line design. They show how a line of this type is typically configured; each plant’s line is sized to its own product mix and output.
| Workpiece | 20-ft box, 6,058 × 2,438 × 2,591 mm, up to 2,500 kg |
|---|---|
| Conveyor | Box-pulling chain (32A roller chain), approx. 280 m |
| Surface preparation | Automatic shot blasting room (10 × 6.6 × 5 m) with servo reciprocators on both sides and top; cleaning room with automatic blow-off; abrasive recovery and cartridge dust collector |
| Liquid paint booths | Primer, intermediate and topcoat booths, 10 × 6.6 × 5.2 m, reciprocators on both sides, top and bottom; interior-cavity primer applied by robot |
| Robots | Yaskawa 7-axis explosion-proof, 15 kg payload, 2,700 mm reach, on travel rails |
| Paint supply | Graco high-pressure airless automatic guns; 2K automatic mixing for primer, intermediate and topcoat |
| Powder booth | Automatic, 9.8 × 4.9 × 4.2 m; cyclone and cartridge recovery; explosion isolation valves and flameless venting |
| Ovens | Paint drying 80–120 °C; powder curing 200–220 °C; direct natural-gas heating (280,000 and 440,000 kcal/h burners); forced cooling after each oven |
| Quality check | Rain test chamber, 10 × 6 × 5 m |
| VOC treatment | 160,000 m³/h dry filtration + activated carbon adsorption + catalytic combustion |
| Output | Reference layout: 20 boxes per 12 hours. MUSI’s fastest energy-storage box lines release one finished box per minute. |
Results
The line paints energy-storage boxes for the client’s storage systems. At their fastest, MUSI’s energy-storage box lines release one finished box per minute.
Selection logic: why this configuration
Container-scale booths were specified although the client is a systems integrator rather than a container maker, because its grid-side products are 20-ft boxes and the finish is judged by utility customers against container standards. A transfer system between stations was chosen so the line runs its current volume with the option to add stations as the European business grows.
Scope of supply and key components
| Item | Specification | Notes |
|---|---|---|
| Surface preparation | ||
| Paint booths | Container-scale, primer and topcoat | |
| 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) |
| Painting robots | ABB IRB 5500, FANUC P-350iA, Yaskawa MOTOMAN MPX series, KUKA, Kawasaki |
| 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 |
| 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 reference configuration is a design for 20-ft boxes and its output is a design value; this line is sized to the client's box programme. Boxes for Europe may need coating systems and VOC limits set by the destination market, covered in the Europe guide linked below.
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
What finish do grid-side energy-storage boxes need? A container-grade exterior system for years outdoors, full coverage of seams and doors, and a sealing check; the reference configuration shows the typical stations.
Can a systems integrator run its own box painting line? Yes; this client paints its own boxes so that enclosure quality and lead time are under its control rather than a container supplier's.
What VOC requirements apply for boxes going to Europe? The destination market sets the paint system and emission rules; the Europe guide linked below explains what changes in the paint shop.
How are boxes moved between stations? By a transfer system, so each box follows the same primer, topcoat, drying and cooling sequence.
Is the line running? Yes, painting energy-storage boxes for the client's storage systems.
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