HP Generic Cell Qual Test SpecRev107.docx

1、HP Generic Cell Qual Test SpecRev107Lithium ion, lithium ion polymer and thin advanced lithium ion cell qualification test specificationRevision 1.07June 19, 2009Document Revision HistoryDateRev Description08/01/021.00Initial release10/17/021.01Changed to HP format12/03/021.02Added 60 deg C cycle li

2、fe test, and added data summary tables for different temperature cycle life tests. 04/01/031.03Corrected 2.6.3 to read “Cycle #2”.Added picture to 3.4 and listed alternate foam insulation material.Clarified parameters page with C-Rate equivalency and definition of “N/A”.04/03/031.04Revised header to

3、 include cell and manufacturer information. Added Appendix 2, cell design and manufacturing process information summary table.04/10/031.05Made process additions to Appendix 2. Converted tables in Appendix 1 to Excel tables with formulas. Changed 2.1 to read, “Fourpacks are assembled”. Added comment

4、to 3.1 regarding handheld application safety testing.04/20/061.06Changed to 2P3S in 2.1. Lowered high temperature cycling requirements in 2.4 and 2.5. Changed closed foam insulation thickness in 3.4. Changed Appendix A to include the following: 60 changed to 55C; Power supply voltage for overcharge

5、test is 18.5V.06/19/091.07Changed 40C to 45C for cycle life testing1. ScopeThis test specification describes the procedures used to evaluate the cycle performance of a core pack (or soft pack) of cells and the safety performance of individual cells. This document applies to lithium ion, lithium ion

6、polymer and thin advanced lithium ion cells used in HP notebook and handheld products.2. Core pack cycle life performance2.1. Pack configurationCells are connected into an XP by YS matrix, whereXP = the number of cells connected in parallel, andYS = the number of cells in seriesFor example; 2P3S (tw

7、o cells in parallel and 3 cells in series), 1P4S, 2P3S, etc. Four such core packs are assembled for cycle life testing.2.2. Measured parameters2.2.1. VoltageMeasure and record the total voltage of the core pack vs. time throughout the cycle life test.Measure and record the voltage of each bank of pa

8、rallel cells in the core pack. If the test equipment is capable, a back-up charge termination condition is set to Vov, and charge is terminated if any one bank of parallel cells exceeds this value. Likewise, if possible a back-up discharge termination is set at Vuv to stop discharge if any one bank

9、of parallel cells goes below this value.The core packs are charged by a constant current, constant voltage (CCCV) method, and they are discharged at either constant current or constant power according to the test procedure.2.2.2. CurrentMeasure and record the current going into and out of the core p

10、ack vs. time throughout the cycle life test.2.2.3. TemperatureMeasure and record the temperature of a cell near the center of the core pack vs. time throughout the cycle life test.2.3. Calculated valuesCalculate and record capacity (Ah) going into and out of the core pack vs. time, and energy (Wh) g

11、oing into and out of the core pack vs. time throughout the cycle life test. 2.4. Charge and discharge temperature conditions for core pack during cycle life test2.4.1. Cycle one core pack in an environmental chamber set at 10oC, +/- 2oC.2.4.2. Cycle one core pack in an environmental chamber set at25

12、oC, +/- 2oC, or in a room whose ambient temperature remains near this value.2.4.3. Cycle one core pack in an environmental chamber set at45oC, +/- 2oC.2.4.4. Cycle one core pack in an environmental chamber set at55oC, +/- 2oC.2.5. Pass criteria for core pack cycle life testA core pack is considered

13、to have passed the cycle life performance portion of the qualification test if:2.5.1. For a core packs cycled at 25oC, 45oCThe energy (Wh) delivered at cycle #300 is greater than or equal to 80% of the energy (Wh) delivered at cycle #32.5.2. For a core pack cycled at 55oCThe energy (Wh) delivered at

14、 cycle #300 is greater than or equal to 70% of the energy (Wh) delivered at cycle #3An exception will be made for low capacity consumer cells. For these cells, 60% of the Wh delivered at cycle #3 will be acceptable.2.5.3. For a core packs cycled at 10oCThe energy (Wh) delivered at cycle #300 is grea

15、ter than or equal to 50% of the energy (Wh) delivered at cycle #32.6. Core pack cycle test procedure2.6.1. Cycle #0Discharge at Ind constant current to VeodRest for 15 minutes2.6.2. Cycle #1Charge at Inc constant current to Vcl. Terminate charge when current tapers to IctRest for 15 minutesDischarge

16、 at Ind constant current to Veod Rest for 15 minutes2.6.3. Cycle #2Charge at Inc constant current to Vcl. Terminate charge when current tapers to IctRest for 15 minutesDischarge at IC constant current to Veod Rest for 15 minutes2.6.4. Cycle #3 through #300Charge at Isc constant current to Vcl. Termi

17、nate charge when current tapers to IctRest for 15 minutes Discharge at Psd constant power to VeodRest for 15 minutesRepeat up to 300 cycles2.6.5. Optional periodic discharge variations for cycle #3 through #300.Sometimes it is desirable to periodically monitor the energy delivered by a pack when dis

18、charged at a rate different than the standard discharge rate. If required, Appendix 1 will list parameters to be applied to this section of the cycle life test regime from cycle #3 through cycle #300.Repeat the following charge and discharge every N cycles as described in Appendix 1 for the cells un

19、der test.Charge at Iasc constant current to Vcl. Terminate charge when current tapers to IctRest for 15 minutesDischarge at Pasd constant power to VeodRest for 15 minutesReturn to test parameters set in paragraph 2.6.4 for the next(N-1) cycles. Repeat every N cycles3. Cell safety performance3.1. Un-

20、cycled cell safety test overviewTest NameTest Temperature(Cell)Test CurrentPower Supply VoltageTest Duration(Hours)Number of cells testedUC1 Overcharge25oCIOC1VpsET13UC2 Overcharge25oCIOC2VpsET23UC3 Overcharge25oCIOC3VpsET33Overcharge tests are performed on individual cells for notebook applications

21、. A total of nine overcharge tests are performed for a given cell model.The overcharge test procedures vary slightly between cylindrical and prismatic lithium ion cells, and lithium ion polymer or thin advanced lithium ion cells. The lithium ion polymer and thin advanced lithium ion cells sometimes

22、require the mechanical constraint of the final battery pack to prevent them from distorting and burning. If such constraint is required to pass the test, it should be noted along with the overcharge test results.Overcharge tests for handheld applications should be performed on core packs of cells (l

23、ess protection circuitry) as they would be configured in the final application. The current, voltage and configuration information for these tests should be noted along with the overcharge test results. 3.2. Measured parameters3.2.1. WeightMeasure and record cell weight before and after the overchar

24、ge test.3.2.2. VoltageMeasure and record cell voltage vs. time throughout the overcharge test.3.2.3. CurrentMeasure and record the current going into the cell vs. time throughout the overcharge test.3.2.4. TemperatureMeasure and record the cell temperature vs. time throughout the overcharge test.3.3

25、. Cell state of chargeThe cells that are used for these safety tests are brought to 100 % state of charge under standard charge conditions prior to the start of the test.3.4. Cell thermal environmentThe safety tests are performed on individual cells at room temperature. The cells are wrapped with a

26、single layer of Fiberglas insulation. This insulation should be approximately 1.0 inch (25 mm) thick in its uncompressed state. Alternate material is closed cell foam approximately 12 mm thick (see photo).3.5. Pass criteria for safety testsA cell is considered to have passed a given safety test if a

27、ll of the following conditions are met:3.5.1. No smoke is emitted from the cell3.5.2. No fire is emitted from the cell3.5.3. Less than 0.2 weight percent of the cell contents is lost3.6. Cylindrical and prismatic lithium ion liquid electrolyte cell procedure3.6.1. Place the fully charged cell in a f

28、ume hood that provides adequate ventilation in case the cell vents or burns. Connect the power supply and overcharge the cell for the specified period of time. 3.7. Lithium ion polymer and thin advanced lithium ion cell procedure3.7.1. Place the fully charged cell in a fume hood that provides adequa

29、te ventilation in case the cell vents or burns. Connect the power supply and overcharge the cell for the specified period of time. Initially perform this test with the cell unconstrained on the bench.3.7.2. If the cell burns, repeat the test with a piece of Plexiglas or other rigid material placed o

30、ver the cell to simulate a battery case that constrains, or restricts, the expansion of the cell in the thickness dimension. Report this or any other condition required to pass the overcharge test.Appendix A Cell test parameters and Test Results SummaryChemistry (Anode/Cathode)Graphite/Cobalt OxideN

31、ominal Voltage of cell (V) at C/5 dischargeper manufacturer3.7Nominal Energy of cell (Wh) at C/5 discharge per manufacturer Cell weight (g) ParameterValueDescriptionXPYSParallel by series core pack configuration matrixVcl4.2Pack charge clamp voltage (V)Veod3.0Pack discharge cutoff voltage (V)Vov4.35Cell over voltage cutoff (V)Vps18.5Power supply voltage (V) for overcharge testVuv2.75Cell under voltage cutoff (V)IascN/AAlternate specified pack charge current (mA)ICPack C-Rate (mA) for the cell under testIctP