Technology & R&D

Q: What thermal runaway certifications are required for marine batteries?

Key standards include IEC 62619 (industrial battery safety – no fire, no explosion, no propagation after thermal runaway), UL 9540A (thermal runaway propagation test), and DNVGL-CG-0339 (class society guidelines). HyMatt products are designed to these standards, with DNV certification in progress, providing compliance evidence for your project.

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Technology Driven, Marine‑Grade Reliable

R&D Philosophy

Safety

Thermal runaway prevention, electrical protection, and mechanical reliability are highest priorities, implemented through multi‑level redundancy.

Efficiency

Maximise system energy efficiency through cell selection, BMS strategies, and thermal management, reducing total cost of ownership.

Customization

No one‑size‑fits‑all; engineering tailored to actual vessel operating conditions (vibration, salt spray, C‑rate, space constraints).

Technology Stack

Cell

Module

System

Integration

Testing & Validation Capabilities

Electrical

Battery cycler, high‑precision DAQ

Environmental

Temp/humidity chamber, salt spray chamber, vibration table

Safety

Overcharge tester, short circuit tester, nail/crush machine

BMS function

HIL simulation platform

Thermal Runaway Safety – FAQs

What is thermal runaway and why should I care?

Thermal runaway is an uncontrollable chain reaction inside a lithium battery that can lead to smoke, fire or even explosion. For marine batteries, this risk directly impacts crew safety, vessel assets and certification. HyMatt uses multiple layers of protection from cell to system level to minimize this risk.

Is LFP safer than NMC?

Yes. LFP has a thermal runaway trigger temperature about 70°C higher than NMC (270°C vs 150-200°C). In nail penetration tests, LFP’s temperature rise rate is 1/100th of NMC’s. LFP is less prone to fire or explosion under overcharge, crush and nail penetration tests, making it the preferred chemistry for marine applications.

If one cell fails, will it destroy the whole battery system?

No. HyMatt uses a defense-in-depth design: aerogel insulation between cells effectively blocks heat propagation, module-level active cooling, BMS real-time monitoring and fault isolation. Even if a single cell goes into thermal runaway, heat and fire will not spread to adjacent cells or modules. A nitrogen injection system is also available to further suppress combustion.

What thermal runaway certifications are required for marine batteries?

Key standards include IEC 62619 (industrial battery safety – no fire, no explosion, no propagation after thermal runaway), UL 9540A (thermal runaway propagation test), and DNVGL-CG-0339 (class society guidelines). HyMatt products are designed to these standards, with DNV certification in progress, providing compliance evidence for your project.

Do seawater, vibration and salt fog increase thermal runaway risk?

If sealing fails, seawater can cause short circuits between cells; long-term vibration may lead to internal structural fatigue. HMT battery systems meet IP67 rating (module-level waterproof/dustproof) and pass marine-grade vibration testing (simulating trawling, net hauling and rough seas), ensuring seal integrity and structural reliability under harsh marine conditions, preventing external factors from triggering thermal runaway.

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Products: LanghESS-P1; HyMatt-P1

Custom Solutions: LanghESS-S1 Battery System; LanghESS-C1 Containerized System; Propulsion Integration; Shore Power

Applications: Workboats; Small Passenger Vessels; Tugboat; Merchant Vessel; Cruise Ship; Fishing Boats

Contact Us: Bd.C2, No.999 East Gaolang Road, Wuxi, 214124, China; hymatt@hymatt.com; 0510-88705530