Bsi bs en 50342 5 2010 (2011)

BS EN 50342-5:2010 Incorporating March 2011 corrigendum BSI Standards Publication Lead-acid starter batteries Part 5: Properties of battery housings and handles NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW raising standards worldwide™ BS EN 50342-5:2010 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 50342-5:2010 The UK participation in its preparation was entrusted to Technical Committee PEL/21, Secondary cells and batteries A list of organizations represented on this committee can be obtained on 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 © BSI 2010 ISBN 978 580 75054 ICS 29.220.20 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2010 Amendments issued since publication Date Text affected 31 March 2011 Corrections in missing figure and missing text EUROPEAN STANDARD EN 50342-5 NORME EUROPÉENNE November 2010 EUROPÄISCHE NORM ICS 29.220.20 English version Lead-acid starter batteries Part 5: Properties of battery housings and handles Batteries d'accumulateurs de démarrage au plomb Partie 5: Propriétés des poignées et des bacs et couvercles de batteries Blei-Akkumulatoren-Starterbatterien Teil 5: Eigenschaften der Batteriekästen und -griffe This European Standard was approved by CENELEC on 2010-11-01 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels © 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 50342-5:2010 E EN 50342-5:2010 –2– Foreword This European Standard was prepared by the Technical Committee CENELEC TC 21X, Secondary cells and batteries It was submitted to the Unique Acceptance Procedure and was accepted by CENELEC as EN 50342-5 on 2010-11-01 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN and CENELEC shall not be held responsible for identifying any or all such patent rights The following dates were fixed: – – latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement latest date by which the national standards conflicting with the EN have to be withdrawn (dop) 2011-11-01 (dow) 2013-11-01 –3– EN 50342-5:2010 Contents Scope Normative references Definitions 4 Examinations 4.1 General 4.2 Examination of the raw materials 4.2.1 General 4.2.2 Examination on resistance against chemical substances 4.3 Examinations of the battery case 4.3.1 General 4.3.2 Test on disruptive strength 4.3.3 Warm storage 4.3.4 Top load test 4.3.5 Examination on specimens taken out of a battery case 4.3.6 Heat resistance test 4.4 Examinations on the battery 4.4.1 General 4.4.2 Bulge test 4.4.3 Impact test 4.4.4 Strength of the handles tested with continuous load 4.4.5 Strength of the handles tested with sudden load 4.4.6 Hardness of hold-downs for bottom fixation 4.4.7 Thermal shocks 10 Annex A (normative) Datasheet „Material for battery container‟ 11 Annex B (informative) Datasheet „Specimen of battery container‟ 12 Annex C (informative) Devices for testing the ledges .13 Annex D (informative) Impact test on battery container 14 Annex E (informative) Laboratory equipment to test the resistance against chemicals 18 Bibliography 19 Figures Figure – Top load test Figure – Sudden load test Figure C.1 – Device for testing the ledges, fixation by means of a wedge 13 Figure C.2 – Device for testing ledges, paw with metering device 13 Figure D.1 – Examples of impacts and injection points on the containers 15 Figure D.2 – Examples of holes 16 Figure D.3 – Examples of holes/cracks 16 Figure E.1 – Laboratory equipment to test the resistance against chemicals 18 Table Table – Resistance against chemicals EN 50342-5:2010 –4– Scope This European Standard covers multicell battery housings produced of polypropylene as the preferred material for lead-acid batteries as an energy storage device for cranking combustion engines, for lighting and for additional equipment used in road vehicles These batteries are all referred to as starter batteries This European Standard describes battery housings for batteries usable within the engine compartment and for installation under conditions where they are protected from light Batteries of this European Standard not provide additional features for special protection from light Therefore, batteries with limited protection from light are to be treated as a special case The purpose of this European Standard is to describe the properties of battery housings for its use in combustion vehicles by means of uniform examination procedures and by defining the requirements for the raw material and the complete part The test procedure and requirements for the complete housing are described in the main part Test procedures for the raw material are determined in Annex A Annex B recommends possible test procedures for the material properties taken out of the complete housings, without being normative 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 EN 50342-2 Lead-acid starter batteries – Part 2: Dimensions of batteries and marking of terminals IEC 60050-482 International Electrotechnical Vocabulary – Part 482: Primary and secondary cells and batteries EN ISO 527 (series) Plastics – Determination of tensile properties (ISO 527 series) Definitions For the purposes of this document, the terms and definitions given in IEC 60050-482 and the following apply 3.1 battery housing welded unit of battery case and lid 3.2 battery container case with multiple cell compartments 3.3 Battery lid cover for common covering of all cells of a battery case 3.4 hold-downs ledges at the lower part of the battery case for fixation within vehicle ( see EN 50342-2 and EN 50342-4) –5– EN 50342-5:2010 Examinations 4.1 General Depending on the requirements, the examination has to be carried out on standardized samples of raw materials, battery case, battery housing, or complete battery 4.2 Examination of the raw materials 4.2.1 General The examination of the raw materials has to be performed by the supplier of the raw material in accordance to specifications of Annex A and, if not agreed otherwise, be documented in the material specification of a new PP material to be purchased These examinations are preferably ISO Standards The specimens shall be selected according to the specifications in Annex A and the tests are to be carried out according to the specifications in Annex A For documentation the form of Annex A shall be used The samples must be aged before starting the test for at least days at (23°± 0,5) °C and must be tested within months The material properties which have only low impact on the complete housing properties, e g due to the design of the battery housing, are mentioned in the annexes only for information 4.2.2 Examination on resistance against chemical substances The purpose of this test is to check if chemical substances which can occur in the vicinity of batteries and have some chemical affinity to PP can significantly weaken the material properties The test shall be carried out on specimens 5A according to EN ISO 527 The specimens are prepared by injection moulding and must be aged at 100 °C for 4d before starting the test Each sample has to be weighed and all samples for one liquid are treated together under reflux at a temperature and time according to Table In Annex E a laboratory equipment for heat treatment under reflux is depicted For statistical reasons the test shall be carried out on at least samples After treatment each sample shall be dried, weighed and then tested on tensile according to EN ISO 527 The maximum change in weight and tensile strength at yield relative in % to the initial data before treatment with chemicals is given in Table Table – Resistance against chemicals Substance Test temperature for boiling under reflux °C Test time for boiling under reflux Max change in weight Max change in tensile at yield h % % 70 72 10 -20 70 72 10 -30 70 72 20 -30 Biodiesel (Rape seed methyl ester) 70 72 15 -30 Brake fluid DOT 70 72 ±5 Cooling agent (Commercial mixture) 70 72 < 0,5 ±5 Sulphuric acid 1,28 g/ml at 25 °C 70 000 < 0,5 ±5 Synthetic motor oil a Gasoline > 95 ROZ Diesel b c a According to DIN 51604-B , b c according to DIN EN 590 , according to DIN EN 14214 EN 50342-5:2010 4.3 –6– Examinations of the battery case 4.3.1 General These examinations have to be performed by the manufacturer of the battery / case / lid and documented with an “Initial Sample Inspection Report” that shall be provided to the purchaser or by the battery producer in case of complete batteries 4.3.2 Test on disruptive strength The purpose of this test is to prove an injection quality without risk of acid leakage by small holes Apparatus: Commercial high voltage generator with connected adequate test electrodes, in most 1) cases two adjacent plates The voltage must be adjustable up to 25 kV ± KV DC or AC sinus peak to peak with a frequency of 50±10 Hz The maximum output current of the generator must be adjustable to a current limit ≤ mA Execution: The sample to be tested must be dry It has to be positioned between the test electrodes in a way, that one electrode contacts the internal side, the other the outer side of the sample The applied voltage has to be adjusted to generate field strength of at least 5kV / mm up to about 10kV To find the operation threshold a test sample e.g a battery case with a thrilled hole of 1.0 ± 0.1 mm in diameter can be used The electric field is adjusted until the set current limit is reached Requirement: No disruptive discharge = set current limit is reached 1) Electrodes with brush design can be beneficial The electric field is higher on the surface of a tip but decreases with square of distance; system must be checked by experiment 4.3.3 Warm storage The purpose of this test is to prove the stability of the battery case The test discovers internal tensions of the injection moulding process which would result in a warping of the container Apparatus: Heated cabinet with sufficient power The air temperature shall be recovered to the target temperature within 10 after the probe has been installed therein The temperature must be kept at °C Execution: The battery case is put into the preheated heat cabinet (120 2) °C in a way that it is not mechanically stressed It shall not touch other probes or the walls of the heat cabinet and it should be evenly distributed to the available space After h of storage the battery case shall be taken out of the heat cabinet and shall be cooled to room temperature Requirements: The surface must remain even, no change of the original colour shall occur Deformation of the walls to the central position less than 1.5 % referred to the width of the cells Changes in overall dimensions in length width and height shall be less than 1.5 % 4.3.4 Top load test The purpose of this test is to check if the lid will withstand the forces of top loaded fixations and is performed on complete batteries Apparatus: Heating cabinet with sufficient size to be loaded with one battery and power to heat up the battery to 85 ± 2°C Stamp with a size of cm x cm of heat resistant material (steel, aluminium, copper) loaded with a weight of 25 ± kg (equivalent to 250N / 4cm² = 61,6 N/cm²) The system shall be fixed mechanically by a stabilization frame which assures the force being applied even without tilting Metering device with a precision of ±0,1 mm Execution: The battery is placed into the heating cabinet and the stamp is positioned between two centre cells above the cell separate wall The cabinet is closed and heated to 85 ± 2°C After 24 h the battery is taken out and allowed to cool down to room temperature and the impression of the stamp is measured with the metering device Requirements: The depth of the impression should not exceed mm –7– EN 50342-5:2010 Figure – Top load test 4.3.5 Examination on specimens taken out of a battery case These examinations shall document the combination of raw material, design and injection process For some information specimens can also taken out of the walls of the battery housing and checked according to Annex B It has to be considered, that specimen cut out of battery cases are not according to standard ISO conditions and the results can vary largely This information can only be used for special aspects for information or comparison and not as standard 4.3.6 Heat resistance test The purpose of this test is to secure, that during a normal battery life even under elevated temperatures as they may occur in hot climate regions or batteries mounted near the engine, there will be no degradation of the PP material Degradation during battery life would result in a damage of the container and acid loss The test is carried out preferably with welded dummies but also containers and lids can be used The parts are placed into a heating cabinet A direct contact of the parts in the walls or floor mats must be avoided so isolating spacers out of wood or heat resistance poly material have to be used The parts are placed into a heating cabinet and exposed to 150 ± 2°C of circulating air After 300 h exposure (or 400 h for materials with increased heat stability) the parts have to be taken out of the cabinet, cooled for 24 h to room temperature After 24 h inspection and test can be made Requirements: no thermal decomposition, brittleness or cracks should be detected by visual and manual inspection Drop a ball with (900 ± 20) g weight and 60 mm diameter from a high of 30 cm to the surface of the tested part: no mechanical damage shall occur White marks (stress whitening) can be accepted 4.4 Examinations on the battery 4.4.1 General With these examinations the service performance of the battery housing for the use in combustion engine vehicles shall be proved EN 50342-5:2010 –8– 4.4.2 Bulge test The purpose of this test is to verify the stiffness of the battery housing at higher temperatures The stiffness influences the mechanical durability of the battery The test is performed with a battery housing (box and lid welded) Apparatus: Heated cabinet with sufficient power The air temperature shall be recovered to the target temperature of 90 °C latest after 10 after the probe has been installed therein The temperature must be kept at °C Metering device with a precision of ± 0.05 mm Execution: The battery housing is filled with ethylene glycol up to the maximum marking After 24 h at room temperature the dimension is measured over the front sides (case walls parallel to the plates) and recorded as L1 The battery housing is to be placed into the heat cabinet for 24 h at (90 ± 2) °C Afterwards the battery is taken out of the heat cabinet Within 30 s of the measurement of maximum dimension over the front sides is repeated and recorded as L2 Requirement: ((L2 – L1)/L1) x 100 % < % 4.4.3 Impact test The test shall prove the relation of hardness to toughness of the battery housing which is critical at low temperature The test is performed with a battery housing (dummy – box and lid welded), battery or parts of battery housing (box and lid separate) Apparatus: Execution: - Polished steel ball with (900 20) g mass 60 mm diameter - Dropping device with control of height (e.g plastic tube) - Steel plate as support, minimum thickness 10 mm - Freezer of appropriate size, in order to accept the sample and the lower part of the dropping device To ensure a specimen temperature of (-30 stored for at last 24 in the freezer 3) °C at ball impact the sample has to be During the test, the sample should be placed evenly and plane with the samples reversed surface on the steel plate to allow contact with the cooled air Depending on the battery design this fit could be difficult, and the use of individually designed supports for even fit must be applied The bottom of the battery housing should be hit once by the ball from a 30 cm height in the middle of each cell If the injection points are located in the centre of the cells the ball should hit the surface aside and not directly on the injection points – in any case the ball should never directly drop to the injection points If needed, not only the bottom but also all sides can be tested in the same way For clear decisions on a reliable statistical basis the test has to be performed with at least 10 samples randomly picked over h production (Annex D can be used as example) Requirements: Maximum number of damage has to be defined in a statistical way (see Annex D) White marks at the hit places will be tolerated In case of doubt the tested parts can be filled with coloured water and placed on a white blotting paper to detect cracks 4.4.4 Strength of the handles tested with continuous load The purpose of this test is to prove the strength of the handles and their fixations to the battery for manual handling If handles are fixed at the lid the welding of lid and box is tested additionally The test is performed with a battery housing (box and lid welded) or fixed lid only The handles including their fixations to the battery should withstand to the forces that normally occur when a person transports or handles the battery By handling the batteries with handling-apparatus and/or robots the below mentioned load limits may not be exceeded –9– Apparatus: EN 50342-5:2010 - Climate chamber with sufficient power - Pulling device (tensile test apparatus) with sufficient force - Holding plate of 70 mm width Execution: The test is performed at, -30 °C, 23 °C and +50 °C, in each case °C The battery or lid with handle shall be fixed to the pulling device in a manner allowing one handle to be pulled up vertically The handle is hocked into the holding plate and is connected to the pulling device Then the handle is pulled with a speed of 50mm/min until to the re-quested force has been reached Batteries with handles fixated at the lid have to be fixed in a manner, that the welding joint between box and lid is extremely used with pulling force Requirement: Three-times of the battery weight to a max force of 800 N Deformations of the handles are acceptable The transport function must be secured The welding must be checked after this test with the following procedure One of the two gas openings of the cover is closed, the other is applied with a tube The battery is immerged into a water bath, with the lid totally flooded A pressure of 200 mbar is applied for No leakage of air may be observed (plugs, welding, etc.) 4.4.5 Strength of the handles tested with sudden load The purpose of this test is to establish what happens if one handle of a battery is suddenly subjected to the total weight of the battery plus the momentum resulting from the battery falling a set defined distance This happens if the battery is pulled out of a storage rack The battery is placed on a mobile table The battery is attached with a steel wire rope and a slit steel tube or adequate support (length 70 mm, diameter depending of the thickness of the handles, at least some space between mm - mm more than diameter) The mobile table is moved suddenly until the battery drops Instead of a mobile table also a crane can be used to pull the battery This test should be carried out using batteries of the same type that have been stored at -30 °C, 23 °C and 60 °C for a minimum of 12 h The test must be done immediately after the battery is taken out of the storage room Moving mobile table support Figure – Sudden load test Requirement: The handles of the battery must withstand the test without damage or rupture The personnel running this test must be equipped with sufficient personal security equipment to be prepared if the handle breaks and the battery falls to ground 4.4.6 Hardness of hold-downs for bottom fixation The purpose of this test is to prove the hardness of the fastening ledges within the range of elasticity against forces occurring when the battery is fastened to the vehicle The test covers standard bottom hold downs with a height of 10.5 mm according to EN 50342-2 EN 50342-5:2010 – 10 – The test is performed with battery housings or complete batteries Apparatus: Test device according to Figures C.1 and C.2 The battery is fixed on the right side by guide rail of ± 0,5 mm high and on the left side by two movable cotters with undercut toward the hold down to adjust differing widths The cotters have a high of 15 ± mm and are shaped to the hold downs The right fixation lever with 80 ± mm is shown in Fig C2 Heat cabinet with sufficient power Torquemeter with metering range from Nm to 32 Nm, precision Nm Metering device with a precision of ± 0.05 mm Indication: The fastening latch has to be torque-resistant The support for the fastening latch has to be designed in a way that the distance from lever to the metering device has to be equal to the distance between the lever and hold down Otherwise the result has to be converted by calculation according to the length of the levers In order to adjust a proper pretension a M8-screw with fine pitch thread has to be used Execution: This test shall be done at -30 °C, 23°C and 90°C The battery or the battery housing shall be positioned into the testing device and shall be centered to the middle notch Then it should be fixed lengthways with the adjacent wedge The fixation lever shall be stressed with the M8 screw and the torquemeter till Nm are reached In this position the meter device is to be adjusted to “0” The pretension shall be increased in Nm steps to (18 ± 1) Nm and after a pause of 30 minutes the distance of the deformation of the ledge is measured Requirement: Deformation with 12 Nm less than mm No damage 4.4.7 Thermal shocks 1) The target of this test is to check if the heat sealing is able to withstand the typical temperature changes which occur if the batteries are installed under the bonnet Procedure: The procedure should be done on batteries One of the two gas openings of the cover is closed; the other is applied with a tube The battery is immerged into a water bath, with the lid totally flooded A overpressure of 200 mbar is applied for No leakage of air may be observed (plugs, welding, etc.) The battery is cleaned, dried and put into a thermal conditioning cabinet at 24 h at –30 °C and subsequent for 24 h for +80 °C The temperature transition time should be as short as possible and not exceed 90 (or faster if specified) Afterwards of the thermal shock test the battery shall be tested again in the water bath at 200 mbar on leakage No bubbles shall be visible 1) Applicable only for batteries with central degassing system Licensed Copy: Mr Universiti Teknologi Malaysia User, Universiti Teknologi Malaysia, 14/07/2013 09:52, Uncontrolled Copy, (c) The British Standards Institution 2013 – 11 – EN 50342-5:2010 Annex A (normative) Datasheet ‘Material for battery container’ Datasheet A: 'Material for battery container' Date Producer: filled : yes / no Material : Pos Properties Density ( filler must be indicated ) Specimen ISO 1183 pressed plates Determination of melting and crystalization ISO 11357-3 + ISO 11357-7 temperature Method Melt Flow Rate Determination of moulding shrinkage ( MD or TD ) Test condition 5) granulate material ISO 1133 granulate material ISO 294-4 injected specimen D2 60 x 60 x mm according to ISO 294-3 Flexural Modulus ISO 178 ISO 179-1 Determination of hardness ball indentation part ( Rockwell ) ISO 2039-2 tensile modulus ( Young mod ) ISO 527-2 injected specimen '1eA' 1) 160° 170° I cryslalization point ( 10°K/min )4) [°C] 120° 130° I [g/10min] … 15 I 230 °C 2,16 kg before heat aging, 48 hours after molding [%] vertical and horizontal after heat aging, 2h 120 °C [%] vertical and horizontal + 23 °C mm/min mm/min mm/min - 20 °C [Mpa] [Mpa] [Mpa] 3) 1,3 1,5) 0,8 6) 1,3 … 1,8 I 3) I 250 350 6) 350 … 500 1000 1500 1700 … 2500 6) R R 2500 4000 3500 … 5000 6) [kJ/m²] > 10 20 R [kJ/m²] >3 > …6 6) R 80 … 95 2) tbd 6) R R - scale R- scale + 23 °C mm/min [Mpa] + 23 °C 50 mm/min [Mpa] 22 … 31 R + 23 °C 50 mm/min % 10 … 6) R tensile strength at break + 23 °C 50 mm/min [Mpa] 15 … 25 R elongation at break + 23 °C 50 mm/min % + 80 °C Mpa - 10d [%] tensile modulus ( Young mod ) + 23 °C mm/min [Mpa] tensile strength at yield + 23 °C 50 mm/min [Mpa] + 23 °C 50 mm/min % tensile strength at break + 23 °C 50 mm/min [Mpa] elongation at break + 23 °C 50 mm/min % 0,45 Mpa [°C] tensile like point [%] relativ to point injected specimen ISO 527-2/1A elongation at yield 10 I [°C] + 23°C 20mmx20mmx6 tensile strength at yield Info / Req [g/cm³] + 23 °C - 30 °C Charpy Impact Strength, notched by stamping Typical Value melting point ( 10°K/min ) 4) + 23 °C determined value 0,9 … 0,95 3) 0,95 1.05 6) + 90 °C injected specimen 80 x 10 x Unit Creep behaviour elongation at yield ISO 899-1 ISO 527-2 injected specimen ISO 5272/1A aging 120h , circulating air, 120°C , ISO 4577 11 Heat deflection 'HDT', method 'B' ISO 75-2 injected specimen prismatic 80 x 10 x mm 12 Aging with light, ISO 4892-2, only if necessary ISO 527-2 injected specimen ISO 527-2/1A like point 1000 1600 1700 … 2600 50 … 600 10 … 100 tbd R R 70 95 90 … 120 small data basis pressed plates to avoid inclusion of air 6) filled materials used typically for VRLA batteries 6) see data sheet stacking of samples to achieve at least mm recommended 5) R R 2) not filled materials 6) +/- 20 % relative to point The datasheet describes the new material in as-delivery condition The effect of additives or colorant can chage this data and must be checked separate depending on the resolution of the DSC R R 1) 4) 6) R ca 1,4 … 1,6 A 3) 6) R I EN 50342-5:2010 – 12 – Annex B (informative) Datasheet ‘Specimen of battery container’ Datasheet: 'Specimen of Battery Container' Container Suplier: Identification: Date: Mould-Size: Mould-Code: Material Code: Pos Properties Density Ash content Flexural Modulus Dielectric Strength Method Specimen ISO 1183 plate 20 x 20 mm EN 60 plate 20 x 20 mm ISO 178 t.b.d 5A Test condition +23 °C Unit Value Status [g/cm³] informativ [%] informativ + 90 °C [Mpa] informativ + 23 °C [Mpa] informativ informativ ISO 60243-1 5A t.b.d + 23 °C 50% Luftfeuchte [kV/mm] + 23 °C 358N 10s [N/mm²] yield stress [Mpa] informativ tensile strain at break [%] informativ Determination of hardness, ball identation method ISO 2039-1 Ball-D 5mm (9,8N) plate 20 x 20 mm Tensile properties ISO 527-2 ISO 527-2: 5B + 23 °C 50 mm/min Aging with heat 7.1 Appearance circulated air plate 20 x 20 mm better cover with Terminals 150 °C 400 h 7.2 Determination of hardness, ball identation method ISO 2039-1 Ball-D 5mm (9,8N) aged specimen (7.1) + 23 °C 358N ;10s [N/mm²] – 13 – EN 50342-5:2010 Annex C (informative) Devices for testing the ledges Figure C.1 – Device for testing the ledges, fixation by means of a wedge Figure C.2 – Device for testing ledges, fixation lever with metering device EN 50342-5:2010 – 14 – Annex D (informative) Impact test on battery container D.1 General The impact behaviour of battery containers is a property which can be statistically only evaluated by attributive measurements To differentiate between random results and real effects the amount of samples for a clear decision should range at 10 samples at least With only one sample it is statistically impossible to make a reliable decision D.2 Equipment Polished steel ball with (900 ± 20) g weight Dropping device with control of height Steel plate 10 mm thickness Cooling device of appropriate size, in order to store 10 containers and the steel plate D.3 Procedure The test is done at (-30 ± 3) °C The test is done with at least 10 containers because of statistic evaluation If the containers are injected with a multi cavity mould, it might be necessary to check containers of each cavity The 10 containers and the steal plate are cooled to (-30 ± 3) °C for at least h The ball is dropped from a height of 30 cm, once on the centre of each cell of the bottom of the container If the injection points are located in the middle of the cell, the ball is dropped approximately cm from the injection points (see Figure D.1) Don‟t drop onto a mark (for example the date or the number of the mould) – 15 – Impact position EN 50342-5:2010 Injection point Injection point Figure D.1 – Examples of impacts and injection points on the containers After the test, scores are given for each cell according the following rule: - white marks = 20 points, - crack = 10 points, - hole = point EN 50342-5:2010 – 16 – The following figures show examples of holes 20 points 20 points 20 points point 20 points point Figure D.2 – Examples of holes For the example in Figure D.2 the evaluation is: - one hole for centre cell = point, and - white marks for the neighbour cells = 20 points The picture on the right hand of Figure D.3 is an example for a crack (so 10 points) on the third cell 10 points 20 points point 20 points 20 points 20 points 20 points 20 points 20 points Figure D.3 – Examples of holes/cracks If the appearance of a crack is under doubt, the container is filled with water, systematically wiped dry, put on a piece of blotting paper and checked for leaching water The points for each cell of the containers are summarized and the average for all tested containers is calculated by division of the sum of all point divided by the amount of tested containers A damage score (average degree of damage) is calculated by subtracting the average result from 120 (120 = x 20 = maximum possible sum for one container) Damage score = 120 – average of score of 10 containers For evaluation a scale of judgement should be used, one reasonable window of judgement is seen below, but depending on the application variations are possible individually A “damage score” of is perfect Until “damage score” is acceptable Until 10 “damage score” is on the limit of acceptance More than 10 “damage score” is NOT acceptable Licensed Copy: Mr Universiti Teknologi Malaysia User, Universiti Teknologi Malaysia, 14/07/2013 09:52, Uncontrolled Copy, (c) The British Standards Institution 2013 – 17 – EN 50342-5:2010 EXAMPLE OF EVALUATION: An impact test has been done with 10 containers after storage at -30 °C for h The results of this test are documented in table seen below: times white marks and hole: x 20 + = 101 times white marks: x 20 = 120 10 1 1 2 2 bottom W W W W W W W W W W W W W W W W W W W W Number of the 10 checked containers W W W W L W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W 120 120 120 120 101 120 120 120 120 120 118,1 number of the cavity of the container Average of the score of the 10 containers 120 – 118,1 = 1,9  The damage score of the bottom of this container is 1,9 1,9 <  The damage score of the bottom of the container is acceptable EN 50342-5:2010 – 18 – Annex E (informative) Laboratory equipment to test the resistance against chemicals Figure E.1 – Laboratory equipment to test the resistance against chemicals – 19 – EN 50342-5:2010 Bibliography EN 60243 (series) Electrical strength of insulating materials - Test methods (IEC 60243 series) EN ISO 60 Plastics - Determination of apparent density of material that can be poured from a specified funnel (ISO 60:1977) EN ISO 178 Plastics - Determination of flexural properties (ISO 178) EN ISO 179 (series) Plastics - Determination of Charpy impact properties (ISO 179 series) EN ISO 294 (series) Plastics - Injection moulding of test specimens of thermoplastic materials (ISO 294 series) EN ISO 1133 Plastics - Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics (ISO 1133) EN ISO 1183 (series) Plastics - Methods (ISO 1183 series) EN ISO 2039 (series) Plastics - Determination of hardness (ISO 2039 series) EN ISO 6603 (series) Plastics - Determination (ISO 6603 (series) for determining of puncture the density impact of non-cellular behaviour of rigid plastics plastics EN ISO 11357 (series) Plastics - Differential scanning calorimetry (DSC) (ISO 11357 series) ISO 11443 Plastics - Determination of the fluidity of plastics using capillary and slit-die rheometers DIN 51604 FAM testing fluid for polymer materials This page deliberately left blank This page deliberately left blank British Standards Institution (BSI) BSI is the independent national body 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