GB/T 34570.1-2017 in English

《GB/T 34570.1-2017电动工具用可充电电池包和充电器的安全 第1部分：电池包的安全》由TC68（全国电动工具标准化技术委员会）归口，主管部门为中国电器工业协会。

ChinaStandards.net is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.

GB/T 34570 consists of the following parts under the general title Safety for Rechargeable Battery Packs and Chargers for Electric Tools:

——Part 1: Safety for Rechargeable Battery Packs;

——Part 2: Safety for Chargers.

This part is Part 1 of GB/T 34570.

This part is developed in accordance with the rules given in GB/T 1.1-2009.

This part was proposed by China Electrical Equipment Industry Association.

This part is under the jurisdiction of SAC/TC 68 National Technical Committee on Electric Tools of Standardization Administration of China.



Safety for Rechargeable Battery Packs and Chargers for Electric Tools -
Part 1: Safety for Rechargeable Battery Packs

1 Scope

This part of GB/T 34570 specifies the safety requirements for detachable or separable battery pack and integral battery of motor-operated hand-held, transportable electric tools and lawn and garden tools powered by rechargeable battery.

This part is applicable to battery pack with the maximum nominal voltage of d.c. 75 V.

This part is not applicable to:

——General purpose battery packs or batteries installed and used by user;

——Lead-acid batteries;

——Lithium metal type battery packs and batteries;

——Safety for chargers.

2 Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 3883.1-2014 Safety of Motor-operated Hand-held, Transportable Electric Tools and Lawn and Garden Tools - Part 1: General Requirements
GB/T 5169.11-2006 Fire Hazard Testing for Electric and Electronic Products - Part 11: Glowing/Hot-wire Based Test Methods - Glow-wire Flammability Test Method for End-products
GB/T 5169.16-2008 Fire Hazard Testing for Electric and Electronic Products - Part 16: Test Flames - 50W Horizontal and Vertical Flame Test Methods
GB/T 5169.21-2006 Fire Hazard Testing for Electric and Electronic Products - Part 21: Abnormal Heat - Ball Pressure Test
GB/T 16842-2008 Protection of Persons and Equipment by Enclosures - Probe for Verification
GB/T 16855.1-2008 Safety of Machinery - Safety-related Parts of Control Systems - Part 1: General Principles for Design
GB/T 17626.2-2006 Electromagnetic Compatibility (EMC) - Testing and Measurement Techniques - Electrostatic Discharge Immunity Test
GB 21966-2008 Safety of Primary and Secondary Lithium Cells and Batteries during Transport
GB/T 22084.1-2008 Secondary Cells and Batteries Containing Alkaline or Other Non-acid Electrolytes - Portable Sealed Rechargeable Single Cells - Part 1: Nickel-cadmium
GB/T 22084.2-2008 Secondary Cells and Batteries Containing Alkaline or Other Non-acid Electrolytes - Portable Sealed Rechargeable Single Cells - Part 2: Nickel-metal Hydride
GB/T 28164-2011 Secondary Cells and Batteries Containing Alkaline or Other Non-acid Electrolytes - Safety Requirements for Portable Sealed Secondary Cells, and for Batteries Made from Them, for Use in Portable Application
IEC 61960 Secondary Cells and Batteries Containing Alkaline or Other Non-acid Electrolytes - Secondary Lithium cells and Batteries for Portable Applications

3 Terms and Definitions

For the purpose of this document, the following terms and definitions apply.

3.1

cell

electrochemical unit consisting of electrode, electrolyte, vessel, terminal and generally diaphragm and realizing the basic function of directly converting chemical energy into and providing electric energy

3.2

battery

combination of one or more cells used for supplying electric energy to tools

3.3

battery pack

the combination of battery, cell management (control) and shell

Note: cell management (control), besides combining into a whole with battery and shell, may be arranged on the main body of battery tool or in switch assembly, or also in chargers matching with battery tool.

3.4

charging system

combination of circuit systems used for charging, balancing and/or maintaining the battery charging state

3.5

battery system

combination of battery pack, charging system and tool as well as connection possibly existing between them when used

3.6

battery tool

tool powered by rechargeable battery

3.7

C5 rate

current value of a battery or battery pack which is discharged for 5h so that its voltage drops to the cut-off point specified by the cell producer

3.8

charger

part or whole of charging system contained in an independent shell, with the charger containing at least all energy conversion circuits

Note: in such a case, tools may be charged via a power cord or a built-in plug connected to power socket, an independent charger therefore does not necessarily contain all the charging systems.

3.9

detachable battery pack

battery pack contained in a shell independent of battery tool, which is taken down from the tool when being charged

3.10

rupture

state of gas expelling, liquid overflow or solid ejection but without explosion, as a result of damage of cell vessel or battery pack shell

3.11

explosion

damage possibly caused by the condition that battery pack shell suddenly ruptures and main assemblies are ejected out

3.12

fire

the state that battery pack gives out flame

3.13

fully charged

charging the battery or battery pack until the most permissible fully charged state is reached of the cell charging system used together with tools

3.14

fully discharged battery/cell

unless the producer specifies another end-of-discharge voltage, the battery or cell shall be discharged at C5 rate until one of the following conditions appears:

——Discharge is stopped as a result of protective circuit action;

——The battery reaches total voltage, i.e., the average voltage of each cell reaches the final discharge voltage of cell chemical material;

——The voltage of a single cell reaches the final discharge voltage of cell chemical material.

3.15

general purpose battery packs/batteries

battery pack or battery provided by different producers, sold through various channels and used for various products from different producers

3.16

hazardous voltage

voltage between parts whose d.c. average value is greater than 60 V or, when a.c. peak-peak ripple value exceeds 10% of the average value, greater than the peak voltage of 42.4 V

3.17

integral battery

battery contained in battery tool, which is not taken down from the tool when being charged

Note: batteries which are taken down only for the purpose of disposal or recycle is regarded as integral batteries.

3.18

intended use

the use of product (including its parts, accessories, instructions and packaging), process or service, in accordance with the information provided by the producer

3.19

leakage

the state of battery pack leaking electrolyte, gas or other substances, which is not expected in design

3.20

maximum charging current

the maximum current allowed to pass through by cell which is being charged within the range of specific temperatures specified by cell producer and assessed in accordance with GB/T 28164-2011

3.21

nominal cell voltage

battery pack voltage marked on the battery pack and declared by the producer

3.22

overheat

state of battery pack in which its shell temperature rises to above 170℃ in the process of charging and discharging

3.23

rated capacity

battery capacity measured under rated conditions and indicated by the producer

3.24

reasonably foreseeable use

use of product, process or service not complying with the requirements of the producer, resulting from readily foreseeable human activities

3.25

separable battery pack

battery pack contained in a shell independent of battery tool, which is connected to battery tool via soft wire

3.26

specified operating region for charging

conditions for lithium ion battery operating within voltage and current ranges specified by the cell producer and assessed in accordance with GB/T 28164-2011 when being charged

3.27

upper limit charging voltage

the permissible maximum voltage of a lithium ion battery when being charged within the range of specific temperatures specified by cell producer and assessed in accordance with GB/T 28164-2011

3.28

venting

releasing excessive internal pressure of cell according to predesign to avoid the occurrence of explosion

4 General Requirements

4.1 The design and structure of battery pack shall ensure safety work and not cause danger to human or surrounding environment in intended use and reasonably foreseeable use of battery tool.

4.2 For the safety of cell or battery with its cell containing alkaline or other non-acid electrolytes, it shall meet the requirements of GB/T 28164-2011 for nickel cadmium battery, nickel-metal hydride battery and lithium ion battery. The performance of nickel cadmium battery shall meet the requirements of GB/T 22084.1-2008, that of nickel-metal hydride battery shall meet the requirements of GB/T 22084.2-2008 and that of lithium ion battery shall meet the requirements of IEC 61960.

4.3 Battery pack, serving as key functional assembly or part of the battery tool, shall meet the requirements of GB/T 3883.1-2014.

5 General Conditions of Test

5.1 The test meeting this part is type test, which shall be carried out by experienced technical personnel according to procedures, with properly protective measures taken, to avoid injury possibly caused.

5.2 Battery, cell management (control) and shell compose the integral battery pack; tests are carried out on each individual specimen, while fewer specimens may be used according to the requirements of the producer. For specimen with the cell management (control) arranged in battery tool main body or switch assembly, the battery tool shall be tested together with the specimen; if the cell management (control) is arranged in a matched charger, the matched charger shall be tested together with the specimen.

5.3 If a certain test is considered inapplicable from the view of the structure of battery tool or battery pack, such test may not be carried out.

Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 General Conditions of Test
6 Marking and Instructions
7 Structure
8 Electric Safety
9 Abnormal Operations
10 Mechanical Strength
11 Packaging, Transport, Storage and Disposal
Bibliography