Cell performance chu eng nge ni?

Cell performance chu eng nge ni?

Cell performance hi a bik takin a then chu a then a ni a, chungte chu electrical performance, safety performance, mechanical performance, leh environment performance te an ni.

(1) Rated theihna a ni .0.5C-a chhuah chuan cell pakhata discharge hun chu min 120 aia tlem ( 90% aia tam emaw, a tlukpui emaw) a ni tur a ni lo va, battery pack-a discharge hun chhung chu 114 min aia tlem ( 90% aia tam emaw, a tlukpui emaw a ni tur a ni lo. He indicator hi lithium battery rated capacity supplier delivery standard-a thil pawimawh ber pakhat a ni.

(2) 1C discharge theihna .Discharge 1C-ah chuan cell pakhata discharge hun chu 57min aia tlem (95%) a ni tur a ni lo va, battery pack-a discharge hun chhung chu 45min (90%) aia tlem lo tur a ni.

(3) Low-Temperature atanga chhuah theihna .0.5C-a discharge -20℃-ah chuan cell emaw battery pack emaw pakhata discharge hun chu 72 min ( 60% aia tam emaw, a tlukpui emaw) aia tlem lo a ni tur a ni. Low-temperature performance hian energy lirthei thar thlasik hun a nghawng nghal a, power battery low temperature discharge specification-a ngaih pawimawh ber a ni.

(4) High-Temperature atanga chhuah theihna .0.5C-a 55 degree-a chhuah chuan cell pakhata discharge hun chu 114min (95%) aia tlem lo a ni tur a ni a, battery pack-a chhuah hun chhung chu 108min (90%) aia tlem lo tur a ni.

(5) Charge retention leh recovery theihna .Ni 28 chhung room temperature-a full charge-a dah a nih hnuah, charge retention-a chhuah hun chhung chu min 96 aia tlem ( 80% aia tam emaw, a tlukpui emaw) a ni lo vang a, charge recovery-a chhuah hun chhung chu min 108 aia tlem lo ( 90% aia tam emaw, a tlukpui emaw) a ni tur a ni. Hei hi energy storage battery ni 28 chhunga charge retention rate atana reference indicator pawimawh tak a ni.

(6) Storage performance 1000 a ni.Storage test atana thlan chhuah single cell emaw battery pack emaw chu siam a nih atanga thla thum aia rei lo tur a ni a, a dahkhawm hmain a capacity 50%-60% ah charge tur a ni. 40℃± 5℃leh relative humidity 45%-75% vel awmna hmunah ni 90 chhung dah tur a ni. Storage period zawhah battery pack chu lak chhuah a ni a, 0.2C-a charge kim vek a, 60min chhung dah phalsak a ni a, chutah chuan constant current 0.5C-ah cut-off voltage-ah discharge a ni. A chunga experiment hi vawi 3 tih leh theih a ni a, discharge hun chhung hi 72min (60%) aia tlem lo a ni tur a ni.

(7) Cycle nun .Single cell emaw battery pack emaw chu 0.2C ah charge a ni a, cycling atan 0.5C ah discharge a ni. Discharge capacity chu vawi hnih a zawnin 72 min (60%) aia hniam a nih chuan test hi tihtawp a ni. Cell pakhata cycle life chu cycle 600 aia tlem a ni tur a ni lo va, battery pack cycle life pawh cycle 500 aia tlem lo a ni tur a ni. Car company leh energy storage project tam zawk tan chuan power battery pack 500-cycle life chu supplier thlanna atana threshold bulpui ber a ni ta a ni.

(8) High-Temperature dahna tur . NunnaHigh-Temperature Storage Life Test atan hian siam a nih atanga thla thum aia rei lovah cell pakhat chauh thlan tur a ni. Storage hmain 50% ± 5% chu charge a ni a, chutah chuan cell chu ni 7 chhung ambient temperature 55℃± 2℃ah dah a ni. Ni 7 hnuah battery chu lak chhuah a ni a, ambient temperature 20℃± 5 degree-ah 120–300 min chhung dah phalsak a ni. A hmasa berin battery chu cut-off voltage 0.5C-ah discharge a ni a, chutah chuan min 30 hnuah 0.2C-ah charge a ni a, min 30 chhung chu a ding a, chutah chuan constant current 0.5C-ah cut-off voltage-ah a discharge a, chu capacity chu recovery capacity atan lak a ni. A chunga step te hian 1-kar khat chhunga cycle an siam a, experiment chu kar khat chhunga discharge hun 72 min (60%) aia tlem a nih chuan a tawp thin. Storage life chu ni 56 aia tlem (kar khatah cycle 8) a ni tur a ni lo. He test hi lithium iron phosphate tam zawkah chuan thil tih ngei ngei tur anga tarlan a ni a, battery high-temperature storage life supplier audit mamawhna a ni.

Electrical Performance

(1) Charging chhunzawm zel .Single cell chu constant current 0.2C hmanga charge a ni. Single cell terminal voltage chu charging limit voltage a thlen chuan constant voltage charging-ah a inthlak a, ni 28 chhung a enkawl a ni. Experiment zawhah chuan battery chu a leak, a vent, a rupture, a man tur a ni lo va, a puak tur a ni lo (full charge float charging nen a inang).

(2) Overcharge 100 a ni.Single cell chu constant current hmangin constant current 3C a ni a, chu chu constant current source hmangin a ni a, voltage chu 10V a thlen chuan battery a puak emaw, kangmei a chhuah emaw thlengin constant voltage charging-ah a inthlak a ni. Charging hun chu 90min emaw battery surface temperature a stabilize (temperature danglamna 45min chhunga 2℃aia tlem emaw a tlukpui emaw) a nih chuan charging hi tihtawp a ni. Battery chuan kangmei leh puak thei lo tur a ni lo; Battery pack hi regulated power supply hmangin constant current 0.5C a charge a, voltage 5NV a thlen chuan (N chu series cells awm zat) a nih chuan battery pack a puak emaw, kangmei a chhuah emaw thlengin constant voltage charging-ah a inthlak a ni. Charging hun chu 90min emaw battery pack surface temperature a stabilize (temperature danglamna 45min chhunga 2℃aia tlem emaw a tlukpui emaw) a nih chuan charging hi tihtawp a ni. Battery chuan kangmei leh puak thei lo tur a ni.

(3) Forced discharge (reverse charging) a ni.Single cell chu constant current 0.2C-ah cut-off voltage-ah a discharge hmasa a, chutah chuan cell chu 1C current hmanga reverse charge a ni. Charging hun hi 90min aia tlem lo a nih a ngai a ni. Battery chuan kangmei leh puak thei lo tur a ni lo; Battery pack-a cell pakhat chauh chu cut-off voltage-ah discharge a ni a, a bak zawng chu fully charged cell a ni a, chutah chuan battery pack chu constant current-ah 1C-a discharge a ni a, battery pack voltage 0V a nih thlengin, discharge chu tihtawp a ni. Battery chuan kangmei leh puak thei lo tur a ni.

(4) Short circuit test a ni a, a khelh dan tur a hriat theih.Single cell chu pawn lam atanga tawi-circuited 90min chhung emaw, cell surface temperature a stabilize thlengin (temperature danglamna chu 45min chhunga 2℃aia tlem emaw, a tlukpui emaw) a ni a, chutah chuan short circuit chu a tawp ta a ni. Pawn lam circuit resistance chu 50mΩ aia tlem a ni tur a ni a, battery chuan kangmei leh puak thei lo tur a ni; Battery pack positive leh negative pole te chu wire 0.1Ω aia tlem lo wire hmangin battery pack voltage 0.2V aia tlem emaw battery pack surface temperature a stabilize emaw (temperature difference 45min aia tlem emaw, a tlukpui emaw) emaw hmangin connect la, chutah chuan discharge chu tihtawp a ni ang. Battery chuan kangmei leh puak thei lo tur a ni.

Safety Performance

(1) Extrusion a ni a .Cell pakhat chu pressing plate pahnih lai takah dah la, zawi zawiin pressure chu 13kn ah tihsan rawh. Cylindrical cell tan chuan extrusion direction chu cylinder axis nen a inmil tur a ni; Prismatic cells tan chuan cell hmel zau leh tawi te chu extruded tur a ni. Cell tin hi extrusion pakhat chauh pek theih a ni a, test result chuan a kaihhnawih standard-a thu awmte chu a zawm tur a ni. Battery pack-ah steel rod diameter 15cm nei dah la, battery pack hmai zau leh tawi tak chu press la, battery original size 85%-ah extrude la, 5min chhung dah rawh. Battery pack tin hi extrusion pakhat chauh pek theih a ni.

(2) A luhchilh dan .Cell pakhat chauh chu steel fixture-ah dah la, cell plate-a perpendicular (steel nail chu cell-a awm reng a ni), 90min chhung chhunzawm la, cell surface temperature a stabilize hunah (temperature danglamna chu 2℃aia tlem emaw, a tlukpui emaw a nih chuan 90min chhung chhunzawm la)

(3) Thil rit tak a nghawng .Cell pakhat chauh chu rigid plane-ah dah la, cell lai takah chuan steel rod diameter 15.8mm flat-a zau dah la, plane nena inmil steel rod longitudinal axis chu dah rawh. Thil rit tak, mass 9.1kg nei chu cell lairil a steel rod chungah 610mm a sang atanga fall chhuah phal a ni a Cell pakhat chu cylindrical a nih chuan impact direction chu cylinder longitudinal axis nen a inmil tur a ni a; Single cell chu prismatic a nih chuan cell hmel zau leh tawi tak chu a nghawng tur a ni. Cell tin hi impact pakhat chauh a awm thei.

(4) mechanical shock a ni a, a man pawh a to hle.Battery emaw battery pack emaw chu rigidly fixed tur a ni (chu method chuan battery emaw battery pack emaw fixed surface zawng zawng a support thei) a, experimental equipment-ah a secure tur a ni. Battery emaw battery pack emaw chu a tlukpui shock pakhat, a sir lehlama perpendicular direction pathum-ah a awm tur a ni. A tlem berah kawng khat chu battery emaw battery pack emaw hmai zau tak nen a inmil tur a ni. Shock tin chu hetiang hian tih tur a ni: A tir lama 3ms chhunga acceleration average tlem ber chu 725m/s2 a ni tur a ni a, peak acceleration chu 1225-1715m/s2 inkar a ni tur a ni.

(5) Vibration 1000 a ni.Battery emaw battery pack emaw chu vibration testing atan fixture hmangin vibration table-ah direct-a dah emaw, dah emaw a ni. Test conditions te chu: frequency 10-55Hz, acceleration 29.4m/s2, xyz lam hawi pathum, direction tinah sweep cycle 10, leh sweep rate chu 1oct/min a ni.

(6)Free drop a awm bawk.Single cell emaw battery pack emaw chu 600mm a sang 600mm atanga 20mm thick hard wooden board cement floor-a dah, xyz pakhat zel atanga three directions pakhat zel atanga drop free turin phalsak a ni.

Cell Performance

(1) Baking a sang hle a ni.Single cell chu high-temperature explosion-proof box-ah dah la, 5℃/min rate-in 130 degree-ah tisang la, he temperature-ah hian 10min chhung dah rawh.

(2) Temperature sang tak dahna .Single cell emaw battery pack emaw chu oven-ah (75 ± 2) degree-ah 48h chhung dah rawh. Battery chu a leak tur a ni lo va, a chhuak tur a ni lo va, a rupture tur a ni lo va, a kang lo tur a ni lo va, a puak tur a ni lo.

(3) Pressure hniam .UL1642 (Underwriters Laboratories Inc.) Standard chu a hmu thei ang. Battery hi absolute pressure 11.6kPa leh temperature 20℃± 3℃a awm angin 6h chhung dah a ni . Battery chuan kangmei leh puak a man tur a ni lo va, perforation leh leakage a awm tur a ni lo.