As the light electric vehicle (LEV) market, especially e-bikes, e-scooters, cargo bikes, and electric wheelchairs, continues to expand rapidly across Europe, safety has become the top priority. Lithium-ion batteries power these devices, but they also introduce risks such as thermal runaway, fire, and electrical failures if not properly designed and tested. For OEMs, engineers, and procurement managers, sourcing an EN50604-1 certified lithium battery supplier is now a critical step in ensuring product reliability, regulatory alignment, and successful market entry.
EN 50604-1 stands as the key European standard for secondary lithium batteries used in light EV applications. For engineers and purchase managers sourcing batteries for EU markets, choosing EN50604-1 compliant or EN50604-1 certified batteries is critical for regulatory compliance, product safety, reduced liability, and smooth market access.
This comprehensive guide explains what EN 50604-1 entails, why it matters in 2026, the specific tests involved, how to evaluate suppliers, and practical steps to source reliable certified battery packs. Whether you are developing a new e-bike platform or managing procurement for fleet production, this article will help you make informed decisions.
What Is EN 50604-1 and Why Does It Matter?
EN 50604-1:2016 (with amendments A1:2021 and A2:2025) is titled Secondary lithium batteries for light EV (electric vehicle) applications — Part 1: General safety requirements and test methods. Developed by CENELEC, it provides detailed safety requirements and test procedures specifically for removable lithium-ion battery packs and systems intended for light electric vehicles.
Scope:
- Applies to removable traction battery systems/packs.
- Covers Voltage Class A (≤ 60 V DC / 30 V AC) and Voltage Class B (higher voltages within defined limits).
- Targeted applications: e-bikes (EPACs), e-scooters, electric cargo bikes, wheelchairs, and other L1–L7 category light EVs.
- Focuses on safety under normal use, foreseeable misuse, and abuse conditions.
The A2:2025 amendment clarifies testing procedures based on feedback from accredited test institutes, with mandatory national implementation scheduled by June 2026.
Why EN50604-1 Compliance Is Critical in 2026
EN 50604-1 directly supports CE marking and integrates with EN 15194:2017 + A1:2023 (the core standard for electrically power-assisted cycles – EPACs). The EN 15194:2017+A1:2023 transition was extended to 15 May 2026 for full presumption of conformity, after which compliance with EN 50604-1 becomes effectively required for new e-bike models across the EU, with particularly strict enforcement in markets like France.
Key benefits include:
- Prevention of thermal runaway and fire hazards.
- Robust protection against mechanical damage, electrical faults, and environmental stress.
- Reduced risk of product recalls, insurance issues, or market bans.
- Easier access to EU distributors and retailers who demand certified batteries.
- Alignment with the EU Battery Regulation and Machinery Directive.
Without proper EN50604-1 compliance, batteries may prevent overall product certification under EN 15194, leading to delays or rejection in key European markets.
EN50604-1 vs Other Battery Standards (Quick Comparison)
Standard | Primary Focus | Best Suited For | Transport Safety | Region |
|---|---|---|---|---|
EN 50604-1 | LEV traction battery safety | Electric bicycles, electric scooters, cargo bikes | No | EU |
EN 15194:2017+A1:2023 | Complete EPAC (e-bike) safety & performance | Electrically power-assisted cycles | No | EU |
IEC 62133-2 | Portable rechargeable batteries | Consumer electronics | No | International |
UN 38.3 | Lithium battery transport safety | Shipping of all Li batteries | Yes | Global |
UL 2271 | Light electric vehicle batteries | North American LEVs | No | USA/Canada |
In short:
- EN50604-1 = battery safety
- EN15194 = full e-bike system safety
- UN38.3 = transport safety
Key Requirements and Tests in EN 50604-1
The standard combines design requirements with rigorous performance and abuse testing at the battery pack/system level. It emphasizes a reliable Battery Management System (BMS) to prevent overcharge, over-discharge, short circuits, and thermal issues.
Core Design Requirements
- Robust mechanical enclosure with adequate electrical isolation.
- Effective cell balancing and fault detection in the BMS.
- Clear marking and labeling (voltage, capacity, warnings, manufacturer info).
- Protection against reverse polarity, insulation failure, and external damage.
Main Test Categories
EN 50604-1 includes electrical, mechanical, environmental, thermal, and system-level tests:
Electrical Tests
- Overcharge protection
- External short circuit
- Over-discharge and overcurrent
- Insulation resistance and dielectric voltage withstand
- Cell imbalance simulation
Mechanical Tests
- Vibration endurance (simulating road conditions)
- Shock and impact
- Drop test
- Crush and mechanical abuse
Environmental & Thermal Tests
- Thermal cycling and high/low temperature operation
- Humidity and salt spray resistance
- Water immersion or exposure
- External fire exposure and thermal runaway propagation prevention
System & BMS Tests
- BMS functionality under fault conditions
- Failure of cooling or thermal management (if applicable)
The A2:2025 amendment provides clearer guidance on test setups and acceptance criteria. Batteries must demonstrate no fire, no explosion, no leakage, and no dangerous venting in most abuse scenarios. Testing is performed by accredited third-party laboratories (e.g., TÜV, VDE). Self-declaration is insufficient, buyers should always request full test reports and a valid Declaration of Conformity (DoC).
How to Choose an EN50604-1 Certified Battery Supplier (Step-by-Step Checklist)
This is the most critical part of the decision-making process. A structured evaluation can significantly reduce risk and improve long-term outcomes.
1. Verify Certification Authenticity
Start by confirming that the supplier’s compliance claims are legitimate:
- Request model-specific test reports
- Ensure alignment with EN 50604-1:2016 + A1:2021
- Verify testing was conducted by accredited laboratories
Be cautious of generic or outdated reports that do not match the actual product.
2. Evaluate BMS Engineering Capability
The BMS is the core of battery safety and intelligence. Assess whether the supplier offers:
- In-house BMS development
- Advanced protection algorithms
- Communication protocol support (CAN, RS485, UART)
- Diagnostic and data logging functions
Suppliers with in-house BMS development typically provide higher reliability and greater customization flexibility.
3. Assess Structural and Thermal Design
A certifed battery must perform reliably under real-world conditions. Evaluate:
- Anti-vibration and shock-resistant design
- Efficient thermal management
- Compact and application-specific integration
This is particularly important for e-bikes and scooters operating on uneven terrain.
4. Check Manufacturing and Quality Systems
Compliance must extend beyond prototypes to mass production. Key indicators include:
- Quality certifications such as ISO9001 or IATF16949
- Automated production lines
- Full traceability of materials and components
EN50604-1 compliance must be consistent across mass production, not just initial test samples.
5. Evaluate Customization Capability
Most OEM projects require tailored solutions. A strong supplier should offer:
- Flexible voltage and capacity configurations
- Custom form factor design
- Support for multi-battery or parallel systems
Customization capability often reflects the supplier’s underlying engineering strength.
Tritek’s EN50604-1 Battery Solutions
As a dedicated EN50604-1 lithium battery manufacturer, Tritek specializes in designing and manufacturing high-quality, third-party-certified lithium battery packs for the European LEV market. Our packs have successfully passed rigorous testing, including the latest amendments, and are trusted by OEMs in e-bikes, e-scooters, and cargo applications.
Key Features:
- Voltage options: 36V, 48V, 60V, 72V and custom configurations
- Optimized cell chemistries for safety and cycle life (including LFP)
- Advanced BMS with multi-layer protections, balancing, and communication
- Robust IP-67 enclosures engineered to pass vibration, shock, and environmental tests
- Complete documentation package: EN 50604-1, UN 38.3, ECE R136, and more
- Flexible customization for connectors, mounting, display integration, and capacity
We support both standard models and fully customized developments. Our engineering team collaborates closely with clients to ensure seamless integration and fast vehicle system certification under EN 15194.
Conclusion
EN50604-1 has become a critical benchmark for lithium battery safety in the European LEV market. However, true compliance goes far beyond obtaining a test report, it requires deep engineering expertise, robust system design, and consistent manufacturing capability.
For companies entering or expanding in the European LEV market, working with an experienced EN50604-1 capable supplier can reduce risk, streamline certification, and accelerate time to market.
FAQ
How do I verify if a supplier is truly EN50604-1 certified?
Check for model-specific test reports, confirm the testing laboratory, and ensure the certified product matches the one being supplied.
Can one supplier provide BMS, battery, and charger together?
Yes. Integrated suppliers often provide better system compatibility, reduced risk, and faster development timelines.
What information should I prepare before sourcing a battery?
You should define voltage, capacity, application scenario, certification requirements, and any customization needs.
How long does EN50604-1 certification take?
Typically 8–12 weeks for testing once prototypes are ready, plus design validation time.
EN50604-1 Supplier Audit Scorecard (Pre-Order Evaluation Tool)
Use this scorecard to systematically evaluate and compare EN50604-1 battery suppliers before placing an order. Assign scores based on evidence, not claims.
Scoring Method
- Score each item from 1 to 5
- 1 = Poor / Not provided
- 3 = Acceptable / Partial
- 5 = Excellent / Fully verified
- 1 = Poor / Not provided
- 3 = Acceptable / Partial
- 5 = Excellent / Fully verified
- Total Score: 100 points
1. Certification & Compliance (Weight: 25%)
Criteria | What to Check | Score (1–5) |
|---|---|---|
EN50604-1 Test Report | Full report (not summary), model-specific | ☐ |
Accredited Lab | TÜV / VDE / SGS or equivalent | ☐ |
Configuration Consistency | Cells, BMS, structure match certified version | ☐ |
Declaration of Conformity | Valid and complete documentation | ☐ |
Additional Certifications | UN38.3, IEC62133, etc. | ☐ |
Subtotal ( /25): ☐
2. BMS Engineering Capability (Weight: 20%)
Criteria | What to Check | Score (1–5) |
|---|---|---|
In-house BMS Development | Not outsourced / black-box | ☐ |
Protection Functions | OVP, UVP, OCP, OTP, SCP | ☐ |
Communication Protocols | CAN, RS485, UART support | ☐ |
Diagnostics & Logging | Fault records, data traceability | ☐ |
Subtotal ( /20): ☐
3. Structural & Thermal Design (Weight: 15%)
Criteria | What to Check | Score (1–5) |
|---|---|---|
Anti-Vibration Design | Suitable for real road conditions | ☐ |
Thermal Management | Heat dissipation under load | ☐ |
IP Rating | IP65 / IP67 verified | ☐ |
Subtotal ( /15): ☐
4. Manufacturing & Quality Control (Weight: 20%)
Criteria | What to Check | Score (1–5) |
|---|---|---|
Quality System | ISO9001 / IATF16949 | ☐ |
Production Automation | Consistency in mass production | ☐ |
Traceability System | Cell → Pack tracking | ☐ |
Batch Consistency | Stable performance across orders | ☐ |
Subtotal ( /20): ☐
5. Customization & Integration Capability (Weight: 10%)
Criteria | What to Check | Score (1–5) |
|---|---|---|
Voltage/Capacity Flexibility | Fits your application | ☐ |
Mechanical Design | Mounting, connectors, form factor | ☐ |
System Integration | Vehicle compatibility support | ☐ |
Subtotal ( /10): ☐
6. Project Execution & Support (Weight: 10%)
Criteria | What to Check | Score (1–5) |
|---|---|---|
Engineering Support | Responsiveness, technical depth | ☐ |
Development Timeline | Sample → certification → mass production | ☐ |
After-Sales Support | Warranty, issue resolution | ☐ |
Subtotal ( /10): ☐
Final Score
Score Range | Evaluation |
|---|---|
85–100 | Excellent supplier (low risk, recommended) |
70–84 | قابل选 / acceptable (needs verification) |
50–69 | High risk (significant gaps) |
<50 | Not recommended |
References
- CENELEC. EN 50604-1:2016 + A1:2021 + A2:2025 – Secondary lithium batteries for light EV applications. General safety requirements and test methods.
- LEVA-EU (March 2026). EN 15194 transition ends 15 May 2026 – Only the updated version with reference to EN 50604-1 may be used thereafter.
- Regulation (EU) 2023/1542 on batteries and waste batteries (EU Battery Regulation). Official Journal of the European Union.
