Table of Contents

1. Certification Roadmap for Energy Storage Batteries
2. Dangerous Goods Classification & Packaging
3. Export Documentation Checklist
4. Step-by-Step Shipping Process
5. Common Pitfalls & How to Avoid Them
6. Frequently Asked Questions

1. Certification Roadmap for Energy Storage Batteries

Before your battery leaves the factory floor, every model must carry valid documentation from accredited laboratories and regulatory bodies. Missing a single certification can hold an entire shipment at customs.

Step 1: UN38.3 Testing (Mandatory for All Lithium Batteries)

The UN38.3 test manual requires every battery model to pass eight consecutive tests before any transport mode accepts it:

• T1 — Altitude Simulation: Validates pressure vessel integrity at 11,000m equivalent altitude.
• T2 — Thermal Testing: 8 cycles between -40°C and +65°C to verify structural stability.
• T3 — Vibration: Sinusoidal vibration across frequency ranges simulating transport shock.
• T4 — Shock: Half-sine pulse tests (15G for cells, 50G for complete batteries).
• T5 — External Short Circuit: Tests thermal runaway resistance under short-circuit conditions.
• T6 — Impact/Crush: Mechanical damage simulation with a 9.1kg weight dropped from 0.6m.
• T7 — Overcharge: Charges battery to 120% of rated capacity with subsequent discharge.
• T8 — Forced Discharge: Simulates reverse polarity conditions during transport.

All eight tests must pass before a CNAS/ILAC-accredited lab issues the UN38.3 report. The report typically takes 10–15 working days and costs $2,000–$5,000 per model depending on test configuration.

Step 2: IEC 62619 (Stationary Application Safety)

IEC 62619 is the international safety standard for industrial lithium-ion cells and batteries in stationary applications. This certification verifies:

• Electrical safety under overcharge, over-discharge, and short-circuit conditions
• Thermal stability and fire resistance of cell chemistry
• Mechanical integrity during normal operation and fault conditions
• Insulation resistance and dielectric strength of packaging

European market: Required under the Low Voltage Directive (LVD) 2014/35/EU for grid-connected energy storage installations.

North American market: Often required by insurance providers and utility interconnection programs as proof of safety engineering rigor.

Step 3: UL 1973 (North America)

UL 1973 is the standard for lithium-ion batteries used in energy storage systems. Key requirements include:

• Thermal management verification — batteries must prevent thermal propagation across individual cells
• Enclosure fire resistance — minimum 15-minute fire rating for accessible battery enclosures
• Electrical protection — overcurrent, short-circuit, and ground-fault detection
• BMS verification — Battery Management System effectiveness under simulated faults

Additional Certifications by Destination

2. Dangerous Goods Classification & Packaging

Lithium energy storage batteries are classified as Class 9 (Miscellaneous Dangerous Goods) under the UN Model Regulations. Correct classification determines everything from packaging to carrier acceptance.

UN Number Assignment

• UN3480: Lithium-ion batteries shipped standalone (packaged alone)
• UN3481: Lithium-ion batteries contained in equipment or packed with equipment
• UN3536: Lithium-ion batteries installed in cargo transport units (for large battery containers)

Packaging Requirements

Every shipment must meet UN packaging standards under Packing Instructions PI965, PI966, or PI967 depending on configuration:

• UN-certified corrugated containers: Must pass drop tests (1.2m for most packages) and vibration tests.
• Lithium battery handling label (UN3480): Required on every outer package, minimum 120mm × 110mm.
• Net weight limits: Max 30kg per inner package for cells; complete battery systems vary by capacity but are often limited to 35kg per package.
• State of charge limitation: Lithium-ion batteries must not exceed 30% state of charge (SOC) when shipped, unless special provisions apply under PI967 Section II.

3. Export Documentation Checklist

Complete and accurate documentation is the difference between smooth clearance and costly delays at customs. Here is the full checklist:

4. Step-by-Step Shipping Process

Here is the practical workflow for exporting energy storage batteries by ocean freight (the most common method):

1. Pre-shipment preparation (10–15 days before loading): Confirm UN38.3 reports are current, prepare MSDS/SDS in both English and destination language, verify all test certificates against the latest regulatory editions.
2. DG freight booking (7–10 days before): Contact a DG-certified freight forwarder with lithium battery experience. Provide UN number, class, net weight, and packaging details. Forwarders unable to accept Class 9 goods will require alternative arrangements.
3. Customs declaration (before loading): Submit the Export Declaration Form, commercial invoice, packing list, and DG documentation through the Chinese customs system (单一窗口). The commodity code for lithium-ion energy storage batteries is typically HS 8507.60 or 8517.70 depending on configuration.
4. Loading & sealing (port day): Ensure containers are loaded in a DG-capable area of the terminal. Each container receives a DG placard and the shipper’s declaration is submitted to the carrier.
5. Vessel departure & transit (10–25 days): Track vessel AIS data. Inform your buyer of expected arrival date 7 days in advance so they can arrange customs clearance.
6. Destination procedures: Provide the buyer with a complete digital document package including scanned originals of all certificates, bill of lading, and insurance documents.

5. Common Pitfalls & How to Avoid Them

Frequently Asked Questions

What is the typical lead time for a complete export order?
Production takes 15–25 days for standard models. After production, allow 3–5 days for documentation preparation and customs clearance at origin, plus 10–25 days ocean transit time depending on destination.

Can you ship batteries with a SOC above 30%?
Under PI967 Section II, batteries charged to more than 30% SOC can be shipped as non-limited goods provided they meet all safety engineering requirements including thermal propagation resistance. Our factory discharges all export units to ≤30% SOC for standard shipments.

Do you provide documentation in multiple languages?
Yes. MSDS, UN38.3 reports, and transport certificates are provided in English. We can also prepare versions in your local language upon request.