Page 23 - TBIS_15194-2019_(EN)_3nd

TBIS 15194:2019

After the test the battery pack shall show no damage that could lead to emission of
dangerous substances (gas or liquid) ignition, fire or overheating.

Other standards and transportation regulation given in national and international
regulations, give additional requirements for general design of the battery and
battery pack.

4.2.11 Maximum speed for which the electric motor gives assistance

4.2.11.1 Requirements

The electrical motor assistance shall stop when the EPAC reaches a speed of 25 km/h
or lower speed if limited by design.
The maximum speed of the EPAC for which the electric motor gives assistance shall

not differ by more than +10 % from the maximum assistance speed indicated in the
marking required by Clause 5 when determined according to the test method
described in 4.2.11.2.

4.2.11.2 Test method

4.2.11.2.1 Test conditions

The test shall be performed either on a test track, a test bench or on a stand that
keeps the motor driven wheel free of the ground.

b) The speed-measuring device used for the test shall have the following
characteristics:
1) Accuracy: ± 2 %;
2) Resolution: 0,1 km/h.
c) The ambient temperature shall be between 5 °C and 35 °C.

d) Maximum wind speed: 3 m/s.
e) The battery shall be fully charged according to the manufacturer instructions.
4.2.11.2.2 Test procedure

Any appropriate method for checking for this requirement is acceptable; one solution

is to measure the cut-off speed, another being to measure the torque output. The
following example describes the cut-off speed test.

a)Pre-condition the EPAC by running it for 5 min at 80 % of the maximum assistance
speed as declared by the manufacturer.

b)Record continuously the current and note the speed at which the current drops to
a value equal to or less than “no load current point”.

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