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GB 24427-2021 English PDF (GB24427-2021)

GB 24427-2021 English PDF (GB24427-2021)

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GB 24427-2021: Content limitation of mercury, cadmium and lead for zinc anode primary battery

This document specifies the limit requirements, inspection methods, and conformity determination requirements for mercury, cadmium and lead contents in standardized zinc-manganese dioxide batteries, zinc-silver oxide batteries, and zinc-air batteries. This document is applicable to the production, testing and acceptance of standardized zinc-manganese dioxide batteries, zinc-silver oxide batteries, zinc-air batteries and batteries composed of multiple single cells.
GB 24427-2021
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 29.220.10
CCS K 82
Replacing GB 24427-2009, GB 24428-2009
Content Limitation of Mercury, Cadmium and Lead for
Zinc Anode Primary Battery
ISSUED ON: APRIL 30, 2021
IMPLEMENTED ON: NOVEMBER 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Standardized Zinc-Silver Oxide, Zinc-Air, Zinc-Manganese Dioxide Button Batteries ... 5
5 Limit Requirements for Mercury, Cadmium, and Lead Contents in Zinc Anode Primary Batteries ... 6
6 Test Methods of Mercury, Cadmium and Lead contents in Batteries ... 7 7 Conformity Determination of Mercury, Cadmium and Lead Contents in
Batteries ... 7
8 Marking ... 8
Appendix A (Informative) Size Code Comparison List for New and Old Model Nomenclature of the Button Batteries ... 9
Content Limitation of Mercury, Cadmium and Lead for
Zinc Anode Primary Battery
1 Scope
This document specifies the limit requirements, inspection methods, and conformity determination requirements for mercury, cadmium and lead contents in standardized zinc-manganese dioxide batteries, zinc-silver oxide batteries, and zinc-air batteries. This document is applicable to the production, testing and acceptance of standardized zinc-manganese dioxide batteries, zinc-silver oxide batteries, zinc-air batteries and batteries composed of multiple single cells.
2 Normative References
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this document.
GB/T 8897.1 Primary Batteries - Part 1: General
GB/T 8897.2 Primary Batteries - Part 2: Physical and Electrical Specifications GB/T 8897.3 Primary Batteries - Part 3: Watch Batteries
GB/T 20155 Determination of Mercury, Cadmium and Lead in Battery
3 Terms and Definitions
For the purpose of this document, the following terms and definitions apply. 3.1 Primary cell
The basic functional unit of the power supply that is designed according to the non- chargeable design and directly converts chemical energy into electrical energy. NOTE: It consists of electrodes, electrolytes, containers, terminals, and usually an isolation layer.
3.2 Primary battery
A battery that is composed of one or more single primary cells equipped with necessary devices (such as housing, terminal, sign and protection device).
3.3 Button battery
A cylindrical battery with a total height smaller than its diameter, resembling a button or coin.
3.4 Small button battery
Button battery with a mass of less than 1g.
3.5 Mercury-free battery
Button battery with mercury content no greater than 5??g/g, and other batteries with mercury content no greater than 1??g/g.
3.6 Cadmium-free battery
Battery with cadmium content no more than 20??g/g.
3.7 Lead-free battery
Battery with lead content no more than 40??g/g.
3.8 Zinc anode primary battery
Primary battery that takes zinc as the anode, includes but not limited to zinc- manganese dioxide batteries, zinc-silver oxide batteries, and zinc-air batteries. 4 Standardized Zinc-Silver Oxide, Zinc-Air, Zinc-
Manganese Dioxide Button Batteries
4.1 Zinc-silver oxide button batteries
Zinc-silver oxide button batteries standardized in GB/T 8897.2 include SR41, SR42, SR43, SR44, SR48, SR54, SR55, SR57, SR58, SR59, SR60, SR62, SR63, SR64, SR65, SR66, SR67, SR68, SR69 batteries.
Zinc-silver oxide button batteries standardized in GB/T 8897.3 include SR516, SR521, SR527, SR614, SR616, SR621, SR626, SR712, SR714, SR716, SR721, SR726,
SR731, SR736, SR754, SR916, SR920, SR927, SR936, SR1126, SR1130, SR1136, SR1142, SR1154 batteries.
--- If the mercury, cadmium, and lead contents of one sample battery are higher than the limit requirements in Table 1, while that of the other sample battery is lower than the limit requirements in Table 1, then another two sample batteries are retested. If there is still sample battery fails to meet the requirements in the second time, it shall be determined that the mercury, cadmium and lead contents do not meet the requirements.
7.3 The battery mass is less than 1g (small button battery)
Two sample batteries are tested each time; and each sample batteries are composed of several batteries with a mass of no more than 1g. The judgment shall be carried out according to 7.2.
8 Marking
8.1 Identification
It shall be according to the marking requirements in GB/T 8897.1.
8.2 Identification of hazardous substances
8.2.1 Identification of mercury content
When the mercury content of button batteries is no more than 5??g/g, and the mercury content of other batteries is no more than 1??g/g, it can be marked as "mercury-free battery".
8.2.2 Identification of cadmium content
When the cadmium content of the battery is no more than 20??g/g, it can be marked as "cadmium-free battery".
8.2.3 Identification of lead content
When the lead content of the battery is no more than 40??g/g, it can be marked as "lead-free battery".
8.2.4 Identification of multi-component hazardous substance
If it meets the hazardous substance limit requirements in 8.2.1 and 8.2.2 at the same time, it can be marked as "mercury-free and cadmium-free batteries"; if it meets the hazardous substance limit requirements in 8.2.1 and 8.2.3 at the same time, it can be marked as "mercury-free and lead-free batteries"; if it meets the hazardous substance limit requirements in 8.2.1, 8.2.2 and 8.2.3 at the same time, it can be marked as "mercury-free, cadmium-free and lead-free batteries".

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