BS PD IEC TR 62914-2014 Secondary cells and batteries containing alkaline or other non-acid electrolytes Experimental procedure for the forced internal short-circuit test .pdf

1、BSI Standards Publication Secondary cells and batteries containing alkaline or other non-acid electrolytes Experimental procedure for the forced internal short-circuit test of IEC 62133:2012 PD IEC/TR 62914:2014National foreword This Published Document is the UK implementation of IEC/TR 62914:2014.

2、The UK participation in its preparation was entrusted by Technical Committee PEL/21, Secondary cells and batteries, to Subcommittee PEL/21/1, Secondary cells and batteries containing alkaline and other non-acidic electrolytes. A list of organizations represented on this committee can be obtained on

3、request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2014. Published by BSI Standards Limited 2014 ISBN 978 0 580 85992 2 ICS 29.220.30 Compliance with a

4、 British Standard cannot confer immunity from legal obligations. This Published Document was published under the authority of the Standards Policy and Strategy Committee on 30 September 2014. Amendments/corrigenda issued since publication Date Text affected PUBLISHED DOCUMENT PD IEC/TR 62914:2014 IE

5、C TR 62914 Edition 1.0 2014-05 TECHNICAL REPORT Secondary cells and batteries containing alkaline or other non-acid electrolytes Experimental procedure for the forced internal short-circuit test of IEC 62133:2012 INTERNATIONAL ELECTROTECHNICAL COMMISSION L ICS 29.220.30 PRICE CODE ISBN 978-2-8322-16

6、22-4 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside PD IEC/TR 62914:2014 2 IEC TR 62914:2014 IEC 2014 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 6 2 Normative references 6 3

7、 Experimental procedure of the forced internal short-circuit test 6 3.1 Example of preparation of nickel particle . 6 3.1.1 Material and tools 6 3.1.2 Example of a nickel particle preparation procedure 6 3.2 Positioning (or placement) of a nickel particle . 7 3.3 Damaged separator precaution . 8 3.4

8、 Caution for rewind separator and electrode . 8 3.5 Insulation film for preventing short circuit 8 3.6 Cautions on disassembling cell . 8 3.7 Protective goods for safety . 9 3.8 Cautions in case of fire during disassembling . 9 3.9 Cautions for disassembling process and pressurizing electrode core 9

9、 3.10 Recommended specifications of a pressurizing device 9 Bibliography 11 Figure 1 Dimensions of a completed nickel particle 7 Figure 2 Positioning of nickel particle when it cannot be placed in the specified area 8 Figure 3 Cylindrical cell 8 Figure 4 Distance / time ratio of several types of pre

10、ssurizing devices . 10 Table 1 Recommended specifications of a pressurizing device 10 PD IEC/TR 62914:2014IEC TR 62914:2014 IEC 2014 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ SECONDARY CELLS AND BATTERIES CONTAINING ALKALINE OR OTHER NON-ACID ELECTROLYTES EXPERIMENTAL PROCEDURE FOR THE FORCED IN

11、TERNAL SHORT-CIRCUIT TEST OF IEC 62133:2012 FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all

12、 questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Public

13、ation(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IE

14、C collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of op

15、inion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to

16、 ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparent

17、ly to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certifi

18、cation bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall

19、 attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal

20、 fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publi

21、cation. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. The main task of IEC technical committees is to prepare International Standards. Ho

22、wever, a technical committee may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art“. IEC/TR 62914, which is a technical report, has been prepared by subcommitt

23、ee 21A: Secondary cells and batteries containing alkaline or other non-acid electrolytes, of IEC technical committee 21: Secondary cells and batteries. PD IEC/TR 62914:2014 4 IEC TR 62914:2014 IEC 2014 The text of this technical report is based on the following documents: Enquiry draft Report on vot

24、ing 21A/537/DTR 21A/549/RVC Full information on the voting for the approval of this technical report can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of

25、this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of

26、 this publication may be issued at a later date. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printe

27、r. PD IEC/TR 62914:2014IEC TR 62914:2014 IEC 2014 5 INTRODUCTION The second edition of IEC 62133 was published on December, 2012. This technical report provides supplemental information to perform the forced internal short-circuit test of IEC 62133:2012. PD IEC/TR 62914:2014 6 IEC TR 62914:2014 IEC

28、2014 SECONDARY CELLS AND BATTERIES CONTAINING ALKALINE OR OTHER NON-ACID ELECTROLYTES EXPERIMENTAL PROCEDURE FOR THE FORCED INTERNAL SHORT-CIRCUIT TEST OF IEC 62133:2012 1 Scope This Technical Report identifies experimental procedures for the forced internal short-circuit tests in terms of designati

29、on, dimensions, tests and requirements. It supplements 8.3.9 of IEC 62133:2012. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undate

30、d references, the latest edition of the referenced document (including any amendments) applies. IEC 62133:2012, 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 porta

31、ble applications 3 Experimental procedure of the forced internal short-circuit test 3.1 Example of preparation of nickel particle 3.1.1 Material and tools The necessary material and tools required for this preparation are listed below. a) a nickel piece: Prepare nickel plate (soft temper; ISO 6208,

32、NW2200 (Ni 99.0) or NW2201 (Ni 99.0 -LC) 0,10 0,01 mm thick made into a piece 0,20 05 , 0 03 , 0 + mm wide and 2,00 0,30 mm long by slit processing or using a punching press; b) a stereomicroscope; c) a cutter knife; d) glass slides (2 slides: 1 mm or thicker with square corners); e) a graph paper (

33、1 mm square); f) a storage container for nickel particles. 3.1.2 Example of a nickel particle preparation procedure The following steps are to be undertaken: a) place graph paper on the stage of the stereomicroscope and focus the microscope on the lines of the graph paper; b) while looking through t

34、he microscope, place the nickel piece parallel to a line of the graph paper. The nickel piece should be placed horizontally, with its 0,20 mm sides extending downward perpendicularly from and its 2,0 mm sides running parallel to the line on the graph paper; c) place a glass slide vertically over the

35、 left half (1,0 mm) of the nickel piece. Use a line of the graph paper as a guide to position the edge of the glass slide; PD IEC/TR 62914:2014IEC TR 62914:2014 IEC 2014 7 d) while holding the glass slide in place with your fingers, fold and raise the right half (1,0 mm) of the nickel piece using a

36、cutter; e) place the other glass slide to the right of the nickel piece to sandwich the raised part. Slightly press the right slide against the raised part so that the nickel piece is bent to an angle of 90; f) Store the completed nickel particles in a storage container to prevent it from being defo

37、rmed before the test. NOTE The completed nickel particles can also be obtained in using a press machine. Figure 1 shows the nickel material after folding to a nickel particle. Figure 1 Dimensions of a completed nickel particle 3.2 Positioning (or placement) of a nickel particle The following represe

38、nts some recommendations on the way to place nickel particule: a) In the case that nickel particle cannot be placed in the position as described in draft IEC 62133, the position can be changed. b) For a prismatic cell, you may place a nickel particle in a flat area. However, it shall be positioned i

39、n the center of the pressurized surface. If it is difficult to place a nickel particle under the most outside layer, it may be placed under an inside layer as shown in Figure 2. c) A nickel particle shall not be placed in an area where the positive active material has come off from the aluminum foil

40、. If the material has come off in the specified area, place the nickel particle in another area where the positive active material exists, where the position can be pressed with the centre of the pressuring jig. d) The position of nickel particle may be determined by the cell manufacturer and the te

41、st agent. IEC 1810/14 1,1 0,25 0,1 0,02 (Including burr) 0,1 0,02 (Including burr) 90 10 R0,1 or less PD IEC/TR 62914:2014 8 IEC TR 62914:2014 IEC 2014 Figure 2 Positioning of nickel particle when it cannot be placed in the specified area 3.3 Damaged separator precaution The sample for evaluation sh

42、all not be used when a separator is damaged during preparation e.g., separator is torn. (When a separator is damaged, e.g., the membrane is ruptured; the cell shall not be used as a sample for evaluation) 3.4 Caution for rewind separator and electrode During rewinding the core to original position b

43、y pulling the positive, negative and separator, pay attention to avoid loosening the wound core. Figure 3 below shows an example of cylindrical cell. Figure 3 Cylindrical cell 3.5 Insulation film for preventing short circuit To prevent short circuit before the test, it is recommended to insert an in

44、sulation film of a thickness of 25 m or less. 3.6 Cautions on disassembling cell The following represents some recommendations on the way to disassemble the cell: a) Cells should be disassembled in an open-type dry chamber or a dry room, where the temperature is 20 C 5 C and the dew point temperatur

45、e is below 25 C. IEC 1812/14 Wound core 1. Unwind the wound core to the edge of coated area of positive electrode. Draw a line from outer separator to center. 2. Rewind the core after insertion of nickel particle. Nickel particle Marking Edge of coated area of position 3. When rewind the cor, return

46、 the marked area to the original position. IEC 1811/14 Outer positive electrode Separator Negative electrode Separator Positive electrode Nickel particle PD IEC/TR 62914:2014IEC TR 62914:2014 IEC 2014 9 b) Be careful not to short-circuit cells during disassembling. For example, use tools whose edges

47、 are made of ceramics or insulated. Take great care to disassemble sealing area of cells in particular. c) There are many different cell structures, so it is recommended to check with the manufacturer for the most appropriate structure and part where a short-circuit may easily happen. d) Cells short

48、-circuited during disassembling should not be used for the following test. 3.7 Protective goods for safety It is recommended that long sleeved protective clothing, protective glasses, a mask and gloves should be worn. 3.8 Cautions in case of fire during disassembling The following represents some re

49、commendations on the way to manage a fire: a) To prevent fire spreading, unnecessary flammable materials should not be placed in the work area. b) Take countermeasures to prevent the cell contents scattering when cells catch fire. For example, a fire protection cloth or sand should be available in the work area, and the gas should be exhausted effectively. 3.9 Cautions for disassembling process and pressurizing electrode core The following represents some recommendati