GB 34668-2024Safety technical specification for electrical self-balancing vehicles (English PDF)

3 Terms and definitions

4 Test conditions

5 General safety requirements

6 Electrical safety

7 Mechanical safety

8 Environmental reliability

9 Test methods

10 Marking and instructions

Foreword

This document is drafted in accordance with the rules given in GB/T 1.1-2020, Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

This document replaces GB/T 34668-2023, Safety requirements and test methods for electrical self-balancing vehicles. In addition to structural adjustments and editorial changes, the main technical changes compared with GB/T 34668-2023 are as follows:

a) the "Scope" has been changed (see Clause 1; Clause 1 of the 2023 edition);

b) the term "wheel spin" has been added (see 3.8);

c) the conditions for the rider and for the test vehicle have been changed (see 4.2 and 4.4; 4.2 and 4.4 of the 2023 edition);

d) the "non-metallic materials" requirement has been changed to a "flame retardancy" requirement (see 5.1; 5.1.1 of the 2023 edition);

e) the requirements for metallic materials have been deleted (see 5.1.2 of the 2023 edition);

f) a requirement for clearance between moving parts has been added (see 5.3.2);

g) the requirements for overspeed protection, low battery protection, and hill-holding capability and protection have been changed (see 5.4.1, 5.4.2 and 5.4.3; 5.4.1, 5.4.2 and 5.4.3 of the 2023 edition);

h) the requirement and test method for speed limitation on low battery alarm of the battery pack have been deleted (5.4.6 and 9.1.6 of the 2023 edition);

i) the requirement for protection against wheel spin has been changed (see 5.4.7; 5.4.8 of the 2023 edition);

j) a requirement and test method for switch control protection have been added (see 5.4.8 and 9.1.8);

k) the requirements for cells and battery packs have been changed (see 5.5.1; 5.5.1 of the 2023 edition);

l) "fuse" has been changed to "circuit breaking protective device" (see 5.5.4; 5.5.4 of the 2023 edition);

m) the requirement and test method for heating have been changed (see 6.4 and 9.2.4; 6.4 and 9.2.4 of the 2023 edition);

n) a requirement and test method for charging port protection have been added (see 6.6 and 9.2.6);

o) a requirement and test method for insulation resistance have been added (see 6.7 and 9.2.7);

p) a requirement and test method for partial immersion in water have been added (see 8.3 and 9.4.3);

q) the test method for overcharge protection during energy recovery has been changed (see 9.1.5; 9.1.5 of the 2023 edition);

r) the test method for electric strength has been changed (see 9.2.5; 9.2.5 of the 2023 edition);

s) the dynamic strength test has been changed (see 9.3.3; 9.3.3 of the 2023 edition);

t) requirements for permanent marking and for durability have been added (see 10.2.3 and 10.2.4);

u) the instructions for use have been changed (see 10.4; 10.4 of the 2023 edition).

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.

This document was proposed by and is under the jurisdiction of the Ministry of Industry and Information Technology of the People's Republic of China.

The previous editions of this document and of the document it replaces are as follows:

- first published in 2017 as GB/T 34668-2017, first revised in 2023;

- this is the second revision.