UL SUBJECT 2056-2015 UL Outline for Investigation Safety of Power Banks (Issue 2).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNOVEMBER 3, 20151UL 2056Outline of Investigation for Safety of Power BanksIssue Number: 2November 3, 2015Summary of TopicsThis second issue of the Outline of Investigation for Safety of PowerBank

2、s, UL 2056, and now includes power banks with direct plug-inconstruction for connection to the ac mains supply.ULs Outlines of Investigation are copyrighted by UL. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outlines of Investigation an

3、d all copyrights, ownerships, and rights regardingthose Outlines of Investigation shall remain the sole and exclusive property of UL.COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNOVEMBER 3, 2015U

4、L 20562No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Components 43 Units of Measurement .54 Undated References 55 Reference Publications 56 Glossary .6CONSTRUCTION7 General 6PERFORMANCE8 Ge

5、neral 79 Power Input Test 810 Overload of Output Ports Test .811 Flammability of Photovoltaic Cells Test .812 Capacity Verification Test .9MARKINGS13 General .9INSTRUCTIONS14 General .915 Instructions Pertaining to Risk of Fire or Injury to Persons .10APPENDIX AStandards for ComponentsA1NOVEMBER 3,

6、2015 UL 2056 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover power banks, sometimes also known as portable USB chargers or portableback-up battery power, which are standalone devices that incorp

7、orate batteries for mobile powering of lowvoltage electronic devices.1.2 These requirements cover products with the following power characteristics:a) Input:1) Supplied by dc power source rated maximum 60 Vdc; or2) Supplied by ac mains power source, through direct plug-in construction.b) Output: Pro

8、vides dc output(s) rated maximum 60 Vdc.1.3 These requirements do not cover products with dedicated inputs from external photovoltaic panels orvehicle 12 Vdc adapters, or other power pack products under the scope of the Outline of Investigation forPortable Power Packs, UL 2743.1.4 These requirements

9、 cover products with integral photovoltaic cells as power source.2 Components2.1 A component of a product covered by this outline of investigation shall comply with the requirementsfor that component. See Appendix A for a list of standards covering components generally used in theproducts covered by

10、 this outline of investigation.2.2 Lithium ion cells shall comply with either the Standard for Lithium Batteries, UL 1642 or the Standardfor Secondary Cells and Batteries Containing Alkaline or Other Non-Acid Electrolytes SafetyRequirements for Portable Sealed Secondary Cells, and for Batteries Made

11、 From Them, for Use inPortable Applications, UL 62133.2.3 Nickel cells shall comply with either the Standard for Household and Commercial Batteries, UL 2054or the Standard for Secondary Cells and Batteries Containing Alkaline or Other Non-Acid Electrolytes Safety Requirements for Portable Sealed Sec

12、ondary Cells, and for Batteries Made From Them, for Usein Portable Applications, UL 62133.NOVEMBER 3, 2015UL 20564UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3 Units of Measurement3.1 Values stated without parentheses are the requirement.

13、Values in parentheses are explanatory orapproximate information.4 Undated References4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall beinterpreted as referring to the latest edition of that code or standard.5 Reference Publications5.1 The following

14、 standards are referenced in this outline of investigation, and portions of thesereferenced standards as identified in this outline may be essential for compliance.UL StandardsUL 1310Class 2 Power UnitsUL 1642Lithium BatteriesUL 2054Household and Commercial BatteriesUL 60950-1Information Technology

15、Equipment Safety Part 1: General RequirementsUL 62133Secondary Cells and Batteries Containing Alkaline or Other Non-Acid Electrolytes Safety Requirementsfor Portable Sealed Secondary Cells, and for Batteries Made from Them, for Use in Portable ApplicationsUL 62368-1Audio/Video, Information and Commu

16、nication Technology Equipment Part 1: Safety RequirementsIEC StandardsIEC 61960Secondary Cells and Batteries Containing Alkaline or Other Non-Acid Electrolytes Secondary LithiumCells and Batteries for Portable ApplicationsNOVEMBER 3, 2015 UL 2056 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER R

17、EPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6 Glossary6.1 DIRECT PLUG-IN CONSTRUCTION A construction which employs a blade assembly on theenclosure for connection to the ac mains circuit.6.2 POWER BANK Also known as portable USB chargers or portable back-up battery power. Astandalone, porta

18、ble power supply with built-in lithium or nickel batteries and dc/dc converter circuitry formobile use of powering electronic devices through USB or similar universal interfaces.CONSTRUCTION7 General7.1 Power banks shall comply with the requirements in the Standard for Household and CommercialBatter

19、ies, UL 2054.7.2 The input port from external power supply is in general dc jack or USB port, and shall not be of thetypes described in 1.3.7.3 If the built-in dc/dc converter circuitry generates voltage exceeding 42.4 Vac or 60 Vdc, this circuitryshall comply with the applicable requirements of eit

20、her the Standard for Information TechnologyEquipment Safety Part 1: General Requirements, UL 60950-1 or the Standard for Audio/Video,Information and Communication Technology Equipment Part 1: Safety Requirements, UL 62368-1.7.4 For power banks with direct plug-in construction, the following shall be

21、 met:a) The power bank and its built-in ac/dc power supply shall comply with the applicablerequirements of either the Standard for Information Technology Equipment Safety Part 1:General Requirements, UL 60950-1 or the Standard for Audio/Video, Information andCommunication Technology Equipment Part 1

22、: Safety Requirements, UL 62368-1.b) A barrier shall be provided between the built-in ac/dc power supply and built-in battery pack.The barrier shall comply with the requirements of electrical insulation and fire enclosure ofeither the Standard for Information Technology Equipment Safety Part 1: Gene

23、ralRequirements, UL 60950-1 or the Standard for Audio/Video, Information and CommunicationTechnology Equipment Part 1: Safety Requirements, UL 62368-1.NOVEMBER 3, 2015UL 20566UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPERFORMANCE8 General

24、8.1 Unless otherwise superseded by a requirement in this Outline, power banks shall comply with therequirements of battery packs in the Standard for Household and Commercial Batteries, UL 2054.8.2 For the Abnormal Charging Test and Abusive Overcharge Test in the Standard for Household andCommercial

25、Batteries, UL 2054, 8.3 8.5 shall be followed.8.3 The tests shall be conducted at the input point of battery protecting circuit. Note This means dc/dcconverter circuitry will be bypassed to result in battery overcharging, which is required for the evaluationof protecting circuit.8.4 For the Abnormal

26、 Charging Test in the Standard for Household and Commercial Batteries, UL 2054,the following shall be taken as maximum current Ic: Rated maximum charging current of the built-in battery(rather than the power bank).8.5 For the Abusive Overcharge Test in the Standard for Household and Commercial Batte

27、ries, UL 2054,the C5amp rate of the built-in battery (rather than the power bank) shall be taken for the purpose of thistest.8.6 For the Battery Pack Component Temperature Test and Battery Pack Surface Temperature Test inthe Standard for Household and Commercial Batteries, UL 2054, 8.7 and 8.8 shall

28、 be followed.8.7 For output loading temperature test, a fully charged power bank shall be discharged. Any load of theoutput ports that can be operated at the same time shall be considered to result in maximum temperaturerise.8.8 For input loading temperature test, a fully discharged power bank shall

29、 be charged in accordance withmanufacturers specifications. Any load of the output ports that can be operated at the same time shall beconsidered to result in maximum temperature rise.8.9 Each output port shall be a limited power source in accordance with the Standard for Household andCommercial Bat

30、teries, UL 2054, the Standard for Information Technology Equipment Safety Part 1:General Requirements, UL 60950-1, or the Standard for Audio/Video, Information and CommunicationTechnology Equipment Part 1: Safety Requirements, UL 62368-1, or a Class 2 power source inaccordance with the Standard for

31、Class 2 Power Units, UL 1310.8.10 Each output port shall be a SELV circuit in accordance with the Standard for Information TechnologyEquipment Safety Part 1: General Requirements, UL 60950-1 or be an ES1 in accordance with theStandard for Audio/Video, Information and Communication Technology Equipme

32、nt Part 1: SafetyRequirements, UL 62368-1.NOVEMBER 3, 2015 UL 2056 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9 Power Input Test9.1 The current input to a power bank shall not exceed 110% of the marked input current rating of thepower ba

33、nk, when the power bank is operated under the conditions of maximum normal load.9.2 Maximum normal load shall consist of the maximum current draw while the power bank is operatingin all possible modes. This may include charging the built-in battery, and output ports unloaded or loadedat the rated ma

34、ximum normal load. Any load that can be operated at the same time shall be consideredin order to obtain the maximum normal load.10 Overload of Output Ports Test10.1 Each power output pin of output port shall be overloaded in accordance with 10.2 10.5.10.2 In accordance with manufacturers specificati

35、ons, fully charge the built-in battery of power bank.10.3 The power bank is covered with one layer of cheesecloth and placed on a softwood board coveredwith one layer of tissue paper.10.4 Each power output pin of output port shall then be loaded to draw the maximum current, for at least1h.10.5 After

36、 this test, the cheesecloth and tissue paper shall remain intact.11 Flammability of Photovoltaic Cells Test11.1 This test shall be conducted if the power bank is provided with integral photovoltaic cells as a powersource.11.2 In accordance with manufacturers specifications, fully charge the built-in

37、 battery of the power bank.11.3 The power bank is covered with one layer of cheesecloth and placed on a softwood board coveredwith one layer of tissue paper.11.4 The power bank is subjected to single component fault that is likely to occur and which would resultin flammability issue of the photovolt

38、aic cells, such as back-feed of battery power, and is kept in this statefor1h.11.5 After this test, the cheesecloth and tissue paper shall remain intact.NOVEMBER 3, 2015UL 20568UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL12 Capacity Verifi

39、cation Test12.1 The marked electrical capacity of power bank, measured at the power output pin of output port, shallcomply with the Standard for Secondary Cells and Batteries Containing Alkaline or Other Non-AcidElectrolytes Secondary Lithium Cells and Batteries for Portable Applications, IEC 61960,

40、 Clause 7.3.1,Discharge Performance at 20 C (Rated Capacity), and the modified test method in 12.2.12.2 The power bank is discharged at a constant current equals to rated current of the output port, untilits voltage is equal to the end-of-discharge voltage of the output port, specified by the manufa

41、cturer.MARKINGS13 General13.1 Unless otherwise superseded by a requirement in this Outline, power banks shall comply with therequirements in the Standard for Household and Commercial Batteries, UL 2054.13.2 For electrical ratings, the following information shall be provided:a) Input rating in Vdc or

42、 Vac and A. If there are more than one input ports, the rating of eachport shall be provided;b) Output rating in Vdc and A. If there are more than one output ports, it shall include rating ofeach port and the combined rating (if it is not equal to the summation of all ports); andc) Electrical capaci

43、ty in Ah or mAh. If there are more than one output ports/output ratings, eitherthe capacity of each port/rating shall be provided, or the minimum capacity of these ports/ratings shall be provided.INSTRUCTIONS14 General14.1 Power banks shall be provided with legible instructions pertaining to the pro

44、per selection andreplacement of its power supply or charger.14.2 Power banks shall be provided with legible instructions pertaining to a risk of fire or injury to personsassociated with the use of the product.14.3 An illustration is allowed with a required instruction to clarify the intent but shall

45、 not replace thewritten instruction.NOVEMBER 3, 2015 UL 2056 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL15 Instructions Pertaining to Risk of Fire or Injury to Persons15.1 Instructions pertaining to a risk of fire or injury to persons sh

46、all warn the user of reasonablyforeseeable risks and state the precautions to be taken to reduce such risks. Such instructions shall bepreceded by the heading INSTRUCTIONS PERTAINING TO RISK OF FIRE OR INJURY TO PERSONSor the equivalent.15.2 Unless otherwise indicated, the text of the instructions i

47、n 15.4 shall be in the words specified orwords that are equivalent, clear, and understandable. Substitution of the signal word DANGER forWARNING is allowed when the risk associated with the product is such that a situation exists which, ifnot avoided, will result in death or serious injury.15.3 Numb

48、ering of the items in the list in 15.4 and including other instructions pertaining to a risk of fireor injury to persons that the manufacturer determines to be necessary and that do not conflict with theintent of the instructions are acceptable.15.4 The instructions pertaining to a risk of fire or i

49、njury to persons shall include those items in thefollowing list that are applicable to the product. The statement IMPORTANT SAFETY INSTRUCTIONSor the equivalent shall precede the list, and the statement SAVE THESE INSTRUCTIONS or theequivalent shall either precede or follow the list. The word WARNING shall be entirely in upper caseletters or shall be emphasized to distinguish it from the rest of the text.IMPORTANT SAFETY INSTRUCTIONSWARNING When using this product, basic precautions should always be followed