1、BRITISH STANDARD AEROSPACE SERIES BS EN 2570:1996 Nickel-cadmium batteries Technical specification The European Standard EN 2570:1996 has the status of a British Standard ICS 29.220.30; 49.060BSEN 2570:1996 This British Standard, having been prepared under the direction of the Engineering Sector Boa
2、rd, was published under the authority of the Standards Board and comes into effect on 15 November 1996 BSI 11-1998 The following BSI references relate to the work on this standard: Committee reference ACE/6 Draft for comment 92/83151 DC ISBN 0 580 26324 X Committees responsible for this British Stan
3、dard The preparation of this British Standard was entrusted to Technical Committee ACE/6, Aerospace batteries, upon which the following bodies were represented: British Airways British Cable Makers Confederation British Rubber Manufacturers Association Civil Aviation Authority (Airworthiness Divisio
4、n) Federation of the Electronics Industry Ministry of Defence Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No. Date CommentsBSEN2570:1996 BSI 11-1998 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 2570 3 Li
5、st of references Inside back coverBSEN 2570:1996 ii BSI 11-1998 National foreword This British Standard has been prepared by Technical Committee ACE/6 and is the English language version of EN 2570:1996 Aerospace series Nickel-cadmium batteries Technical specification published by the European Commi
6、ttee for Standardization (CEN). EN 2570 was produced as a result of international discussion in which the United Kingdom took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct applic
7、ation. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred to Corresponding British Standard ISO 7137:1992 BS 3G 229:1993 Schedule for environmental conditions and test procedures for airborne equipment IEC 51-1:1984 (EN
8、 60051:1989) BS 89 Direct acting indicating analogue electrical measuring instruments and their accessories Part 1:1990 Specification for definitions and general requirements common to all Parts BS EN 60952 Aircraft batteries IEC 952-1:1988 (EN 60952-1:1993) BS EN 60952-1:1993 General test requireme
9、nts and performance levels IEC 952-2:1991 (EN 60952-2:1993) BS EN 60952-2:1993 Design and construction requirements EN 3042:1991 BS EN 3042:1992 Quality assurance. EN aerospace products. Qualification procedure Summary of pages This document comprises a front cover, an inside front cover, pages i an
10、d ii, theEN title page, pages 2 to 20, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2570
11、 July 1996 ICS 49.060 Descriptors: Aircraft industry, aircraft equipment, electric batteries, storage batteries, nickel cadmium batteries, characteristics, test, quality assurance, marking English version Aerospace series Nickel-cadmium batteries Technicalspecification Srie arospatiale Batteries dac
12、cumulateurs au nickel-cadmium Spcification technique Luft- und Raumfahrt Nickel-Cadmium-Batterien Technische Lieferbedingungen This European Standard was approved by CEN on 1995-06-29. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving
13、 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 CEN member. This European Standard exists in three official version
14、s (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Den
15、mark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36,
16、 B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 2570:1996 EEN2570:1996 BSI 11-1998 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Associ
17、ation, this Standard has received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsem
18、ent, at the latest by January 1997 and conflicting national standards shall be withdrawn at the latest by January 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium,
19、Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 0 Introduction 3 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Design 3 5 Tests 7 6 Quality assurance 18 7
20、 Marking 19 8 Accompanying documents 19 9 Delivery 19 Figure 1 Battery connector 5 Figure 2 Adaptor position for horizontal coupling 6 Figure 3 Adaptor position for vertical coupling 6 Figure 4 Orientation of battery for the mechanical shock, vibration, acceleration and inversion tests 11 Figure 5 1
21、2 Figure 6 13 Table 1 5 Table 2 7 Table 3 7 Table 4 10 Table 5 14 Table 6 17 Table 7 18 Table 8 19 Table 9 19EN2570:1996 BSI 11-1998 3 0 Introduction This standard has taken into consideration IECstandards 952-1 and 952-2 implemented at European level as EN 60952-1 and EN 60952-2. 1 Scope This stand
22、ard provides information on design and specifies complementary requirements for nickel-cadmium batteries for aerospace applications. It is applicable whenever referenced. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. Thes
23、e normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undate
24、d references the latest edition of the publication referred to applies. ISO 7137, Aircraft Environmental conditions and test procedures for airborne equipment (Endorsement of EUROCAE/ED-14C and RTCA/DO-160C). IEC 51-1, Direct acting indicating analogue electrical measuring instruments and their acce
25、ssories Part 1: Definitions and general requirements common to all parts. IEC 952-1, Aircraft batteries Part 1: General test requirements and performance levels. IEC 952-2, Aircraft batteries Part 2: Design and construction requirements. EN 3042, Aerospace series Quality assurance EN aerospace produ
26、cts Qualification procedure. 3 Definitions For the purposes of this standard, the following definitions apply: nickel-cadmium cell rechargeable alkaline accumulator in which the positive active mass is nickel-based and the negative active mass is cadmium-based rated capacity C 1 quantity of electric
27、ity (in Ah) which the cell is capable of delivering in 1 h, throughout its normal service life, after full charge, under conditions defined with regard to temperature and end discharge voltage recharged capability the recharged capability is the product (in Ah) of the discharge current values and th
28、e duration charge or discharge currents level of direct current (in A) at which charging 1)or discharging 1)is carried out charged battery battery which has been charged, unless otherwise indicated, in accordance with the procedure described in 5.1.6 end discharge voltage voltage at which discharge
29、shall be stopped. This is obtained by multiplying the voltage per cell by the number of cells maintenance cycle indispensable periodic maintenance and monitoring operation. This is described in the manufacturers maintenance manuals battery case case, not including the lid, containing the battery cel
30、ls and on which the connector is fixed cell container container enclosing the positive and negative plates, the electrolyte etc 4 Design Batteries shall be : made up of electrical cells with vented containers in a battery case from which gas can escape; designed to: a) provide an emergency back-up a
31、nd indirect starting of the main engines (normal batteries); b) provide instantaneous high power and direct starting (high-power or high current batteries); c) satisfy new requirements (e.g. long service life). 1) Current , e.g.: A () C 1 Ah t h () - = C 1 A 10 -0,1 C 1 A =EN2570:1996 4 BSI 11-1998
32、4.1 Battery case The battery case shall be: of metal or other material, resistant to corrosion and, unless otherwise specified, leakproof; designed to hold 19 or 20 cells and such that any movement of the cells is avoided and that they can be removed. Where only 19 cells are required, a suitable dum
33、my shall replace the twentieth cell. Seals and accessories shall be resistant to electrolyte (see 5.3.6) and to the temperatures (see5.4.3 and 5.4.4). The case may be fitted in its upper section with air circulation ducts. The arrangement and form of this device are described in the product standard
34、s. 4.2 Lid (of the battery case) The materials of the lid and its accessories shall have the same characteristics as those of the case. The lid may: be provided with a seal and fitting devices, but is not necessarily sealed; serve to secure the battery and/or have a separate attachment system. These
35、 options are described in the product standard. 4.3 Battery cells Cell containers and lids They shall be: made of insulating material which is resistant to the operating conditions; joined together by a weld which is resistant to atmospheric pressure. Vent plugs Each cell shall be fitted with a vent
36、 plug in plastic material which is resistant to electrolyte and has a seal. The plug shall contain a device to permit the escape of gas and to prevent the escape of liquid if the battery is inverted. The vents shall open at an internal overpressure of between 14 kPa and 70 kPa. The vent plug shall f
37、ulfil its function in all specified tests, at the pressures defined in 5.2.6.1. 4.4 Electrolyte Shall be an aqueous solution of potassium hydroxide. Purity of the solution shall conform to the battery manufacturers specifications. 4.5 Connections between cells These shall be in nickel-coated metal.
38、The type of metal and the section of connections shall be selected so as to be able to withstand the maximum current which the battery can supply. The lock washers shall not damage the connections or the terminal nuts. Where internal monitoring devices are required, these shall not affect the batter
39、y characteristics. 4.6 Identification of polarity The cells shall bear positive polarity markings (+) and if necessary negative (). The battery case shall also bear polarity markings: the positive pole of the receptacle shall be on the right, viewed from the outside. 4.7 Battery connector See Figure
40、 1 and Table 1, Figure 2 and Figure 3 and Table 2. The location of the battery connector is defined in the product standards, in conformity with Table 3. Dimensions and tolerances are in millimetres.EN2570:1996 BSI 11-1998 5 Table 1 Figure 1 Battery connector B C D E F G H I J K L M N O P min. 0,10
41、max. max. 0,05 9,93 17,02 38,91 9,53 1,27 3,18 1,57 16,51 1,70 14,68 16 23,22 3,58 0,97 2,36 Unless otherwise specified, tolerances are 0,13 mm.EN2570:1996 6 BSI 11-1998 Figure 2 Adaptor position for horizontal coupling Figure 3 Adaptor position for vertical couplingEN2570:1996 BSI 11-1998 7 Table 2
42、 Table 3 4.8 Electrical characteristics 4.8.1 Rated voltage 4.8.1.1 Of a cell 1,2 V The recommended number of cells for 28 V d.c. system is 20. 4.8.1.2 Of the battery 1,2 V multiplied by the number of cells connected in series. 4.8.2 Rated capacity It shall correspond to that indicated in the produc
43、t standard. 5 Tests 5.1 General The manufacturer shall supply all accompagning documents (see 8), approved in advance, which may be necessary for the performance and monitoring of tests. 5.1.1 Test conditions Unless otherwise indicated, these are as follows: ambient temperature (23 5) C; pressure 85
44、 kPa to 106 kPa; relative humidity 85 %. The batteries to be tested shall be in a vertical position, with or without a lid, depending on the type of test. Unless otherwise required, the vent plugs shall be fitted. The cells shall not be used outside the battery case. 5.1.2 Thermal stabilization Ther
45、mal stabilization is reached when a probe inserted between two centre cells reaches the required temperature, to 1 K, for 1 h. All batteries heated or cooled in a test shall be left to rest, on open circuit, at the ambient temperature of the test station for at least 16 h. 5.1.2.1 High temperature t
46、ests 16 h to 24 h, at the specified temperature, without exceeding 12 h between charge and discharge. 5.1.2.2 Low temperature tests 16 h to 24 h at the specified temperature. 5.1.3 Connections Batteries shall be connected electrically using the appropriate connector. The battery voltage shall be mea
47、sured at the connection points between the cable and the aircraft-side connector; the voltage drop in the connector shall be taken into account. Cables connected to connectors shall be of a suitable section so that in high temperature rapid discharge tests the temperature of the connector terminals
48、remains lower than that of the internal battery connections. Connections between cells shall be tightened at the terminals to the torque (on the bolt or nut) specified by the manufacturer. 5.1.4 Measuring equipment Electrical measuring equipment shall have an accuracy at least equivalent to category
49、 0,5 (seeIEC51-1), including shunts. Voltmeters shall have a resistance of at least1000W/V and thermometers shall be accurate to less than 1 K. 5.1.5 Instructions maintenance During the course of tests, batteries shall undergo the necessary maintenance operations specified by the manufacturer. All operations, including reconditioning, shall be recorded in the test report. Examples: the quantity of distilled water added shall be stated; measurement of
