GB/T 44258-2024Earth-moving machinery - Battery electric wheel loaders for plateau tunnels (English PDF)

Foreword

SAC/TC 334 is in charge of this English translation. In case of any doubt about the contents of English translation, the Chinese original shall be considered authoritative.

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

Attention is drawn to the possibility that some of the elements of this standard 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 right.

This standard was proposed by China Machinery Industry Federation.

This standard was prepared by SAC/TC 334 National Technical Committee on Earth-moving Machinery of Standardization Administration of China.

1 Scope

China's national standard for the battery electric wheel loader built to work inside a tunnel on the high plateau, and it exists because two hard problems meet in the same machine. The first is the tunnel: a diesel loader working a heading burns oxygen and fills a confined space with exhaust, and the ventilation plant that keeps the face breathable is one of the largest costs of driving a tunnel at all. Take the engine out and that cost falls away, along with the noise and the heat. The second is the altitude: above two thousand metres the thin air derates a diesel engine badly, but it also thins the insulation clearances of electrical equipment, changes how air cooling works, and puts the battery through a wide daily temperature swing - which is why the standard leans on the plateau apparatus standard and on the insulation coordination standard rather than treating the machine as an ordinary electric loader. This document specifies the parameters, requirements, inspection rules, signs, packaging, transport and storage of battery electric wheel loaders for plateau tunnels and describes the corresponding test methods. It applies to the manufacture and testing of wheel loaders for plateau tunnels whose operating energy is supplied entirely by an on-board rechargeable energy storage system and whose maximum motor-driven operating voltage falls in class B. This record is drawn from the official English translation issued by the standardization body, not from a translation of our own.

This document specifies the parameters, requirements, inspection rules, signs, packaging, transport and storage of battery electric wheel loaders for plateau tunnels, and describes the corresponding test methods.

This document is applicable to the manufacturing and detection of wheel loaders for plateau tunnels, with the operation energy fully powered by the on-board rechargeable energy storage system and maximum motor-driven operation voltage classified as class B voltage.

2 Normative references

The following documents contain provisions which, through normative reference in this text, constitute essential provisions of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

The documents cited run from GB/T 4208 through the earth-moving machinery series, the electric vehicle and power battery standards and the plateau and low-voltage insulation standards, to JB/T 5947, JB/T 12462 and JB/T 12463; the complete list with the full titles is given under the normative references of this record.

3 Terms and definitions

For the purpose of this document, the terms and definitions given in GB/T 25602, GB/T 25604, GB/T 44254 and the following apply.

3.1 battery electric wheel loader for plateau tunnels: wheel loaders applicable to working in plateau tunnels, with the operation energy fully powered by the on-board rechargeable energy storage system and driven by electric motors.

4 Parameters

The main parameters of battery electric wheel loaders for plateau tunnels (hereinafter referred to as battery electric wheel loaders) are given in Annex A.

A Annex A (informative) Main parameters of battery electric wheel loaders

Annex A carries Table A.1, Main parameters of battery electric wheel loaders, which lists the parameters by which a machine of this type is described commercially.

B Annex B (informative) Battery electric wheel loader test record

Annex B carries the two record forms used when the machine is tested: Table B.1, Operation performance test record, and Table B.2, Comprehensive heat balance test record.