Inspection | Electric Balance Scooter Inspection Standards and Requirements

1. Material safety inspection requirements

1. Flame retardant properties of non-metallic materials

• Grading standards:

  • V-0: Single burning time ≤ 10 seconds, total burning time ≤ 50 seconds

  • V-1: Single burning time ≤ 30 seconds, total burning time ≤ 250 seconds

  • Test method: UL94 vertical burning test (sample thickness 2.0±0.1mm)

• Key component requirements:

  • The battery compartment housing must meet V-1 level

  • The circuit board substrate must pass the GWIT 775℃ test

  • The material dripping from the pedal surface must not ignite the cotton pad

2. Metal parts protection

• Anticorrosion treatment:

  • Aluminum alloy anodized film thickness ≥ 10μm

  • Salt spray test for steel parts ≥ 96 hours (ISO 9227)

  • Electroplating layer adhesion test (cross-cut method level 1)

• Insulation design:

  • The gap between the metal shell and the charged body is ≥2.5mm

  • Use PTFE or silicone rubber insulating gaskets

  • Insulation resistance after damp heat test ≥10MΩ

2. Structural safety inspection standards

1. Shell protection design

• Requirements for activation:

  • A T8 or higher screwdriver is required for disassembly

  • The anti-dismantling structure has at least 3 fixing points

  • Waterproof grade IP34 (rain test for 10 minutes)

2. Edge security processing

• Protrusion specifications:

  • Exposed thread extension ≤ thread diameter

  • The end of the tubular object is rounded R ≥ 1.0mm

  • Use a 2mm radius probe to detect no sharp points

3. Mechanical strength verification

• Static load:

  • Pedal load 150kg (5 minutes)

  • Handle tensile strength ≥500N

  • Deformation ≤3mm

• Dynamic testing:

  • Drop test (1m height, 3 directions)

  • Vibration test (5-200Hz, 3 hours)

  • Fatigue test (100,000 pedal strokes)

3. Electrical safety testing system

1. Battery system safety

• Lithium battery requirements:

  • Complies with GB/T 40559-2021 standard

  • Overcharge/overdischarge protection response time <1s

  • Short circuit protection action current ≥ 3C

• Test items:

  • Needle puncture test (Φ5mm steel needle)

  • Extrusion test (13kN pressure)

  • Thermal runaway propagation test

2. Circuit protection design

• Insulation performance:

  • Primary circuit withstand voltage 1500V/1min

  • Insulation resistance ≥100MΩ (500VDC)

  • Creepage distance ≥4.0mm

• Overload protection:

  • Motor winding temperature rise ≤75K

  • Fuse I²t characteristic matching

  • Cable temperature monitoring (≤90°C)

3. Charging system inspection

• Charger requirements:

  • Complies with GB 4943.1-2022 standard

  • Anti-reverse polarity design

  • Output ripple ≤ 200mV

• Charging protection:

  • Charging lock function

  • Temperature monitoring accuracy ±2℃

  • Automatic stop when full (accuracy ±1%)

4. Functional safety test specifications

1. Speed protection system

• Speed limit function:

  • Overspeed alarm threshold ≤ 20km/h

  • Rocker angle ≥10°

  • Deceleration gradient ≤ 1m/s²

2. Low battery protection

• Early warning mechanism:

  • Level 1 alarm (20% battery remaining)

  • Level 2 speed limit (10% battery remaining)

  • Power-off protection voltage accuracy ±50mV

3. Special working condition protection

• Hill parking:

  • Maintain a 15° incline for ≥5 minutes

  • Anti-rollback function

  • Torque compensation response time <0.5s

• Instability protection:

  • Stop within 5 seconds after dumping

  • Motor stall current ≤ 2 times rated

  • Automatic power off function

5. Environmental adaptability test

1. Climate testing

• Temperature Cycle:

  • -20℃~60℃ (10 cycles)

  • Storage test (-40℃~70℃)

  • High temperature and high humidity (40°C/95%RH)

2. Protection level verification

• Dustproof test:

  • Φ1.0mm steel wire probe

  • 8-hour dust blowing test

• Waterproof test:

  • Rain test (10L/min)

  • Water splash test (all directions)

3. Electromagnetic compatibility

• Radiated emission: ≤30dBμV/m (30-1000MHz)

• Electrostatic discharge: ±8kV contact discharge

• Radiated immunity: 10V/m (80-1000MHz)

6. Packaging and transportation inspection

1. Packaging safety

• Drop test:

  • Falling from corner/edge/surface (1.2m high)

  • Package compression test (500kg)

• Environmental protection:

  • Moisture-proof packaging (≤85%RH)

  • Thickness of shockproof material ≥30mm

2. Signage system

• Product Identification:

  • Laser engraving depth ≥ 0.3mm

  • Including maximum load, speed level

  • QR code traceability system

• Warning signs:

  • Safety icons

  • Prohibited modification tips

  • Charging precautions

Implementation of this specification requires compliance with the latest version of GB/T 34667-2017, "Safety Requirements and Test Methods for Electric Self-Balancing Scooters." Export products must also comply with the EU EN 17128:2020 standard. Manufacturers are advised to establish a fault tree analysis (FTA) system to verify the reliability of protection functions. Smart self-balancing scooters must also pass RF certification testing for wireless communications (such as Bluetooth).