Dab tsi yog qhov kev them nqi thiab kev tso tawm?
Charge thiabtso tawmyam ntxwv
Lithium-Ion roj teeb feem ntau siv ob-theem charging txoj kev los xyuas kom meej kev nyab xeeb, kev ntseeg siab, thiab kev them nqi. Thawj theem yog qhov tam sim no tsis tu ncua nrog voltage limiting, thiab theem ob yog qhov tsis tu ncua voltage nrog tam sim no limiting. Qhov siab tshaj plaws voltage txwv rau them lub lithium-ion roj teeb txawv nyob ntawm seb cov khoom siv cathode. Qhov yooj yim them / tawm qhov hluav taws xob nkhaus ntawm lithium-ion roj teeb tau qhia hauv daim duab 3-11. Cov nkhaus hauv daim duab siv tus nqi / tawm tam sim no ntawm C / 3. Rau cov roj teeb lithium-ion sib txawv, qhov sib txawv tseem ceeb yog ob npaug:
1) Qhov zoo tshaj tam sim no tus nqi rau thawj theem nws txawv nyob ntawm seb lub roj teeb lub cathode khoom thiab cov txheej txheem tsim. Feem ntau, tam sim no ntau yam ntawm 0.2C txog 0.3C yog siv. Thaum siv hluav taws xob ceev, 1C, 2C, lossis ntau dua tuaj yeem ua haujlwm.
2) Cov roj ntsha lithium sib txawv-ion roj teeb muaj qhov sib txawv tseem ceeb hauv lub sijhawm tam sim no, thiab qhov feem pua ntawm cov peev txheej uas tuaj yeem them los ntawm qhov tam sim no mus rau tag nrho cov peev txheej kuj sib txawv heev. Los ntawm qhov kev xav ntawm kev siv lub tsheb fais fab, lub sij hawm ntev tam sim no ua rau lub sij hawm them tag nrho luv dua, uas muaj txiaj ntsig zoo rau kev siv.
Lithium-ion roj teeb voltage yog qhov ruaj khov thiab txo qis hauv cov theem pib thiab nruab nrab ntawm kev tso tawm, tab sis poob sai sai hauv cov theem tom qab, raws li qhia hauv ntu DE ntawm daim duab 3-11. Kev tswj kom zoo yog qhov tseem ceeb thaum lub sijhawm no los tiv thaiv kev tso tawm ntau dhau thiab tsis muaj kev puas tsuaj rau lub roj teeb.
Cov yam ntxwv cuam tshuam rau kev them nqi
(1) Cov txiaj ntsig ntawm kev them nyiaj tam sim no ntawm kev them tus yam ntxwv Kev Siv qee yam NCM lithium- ion roj teeb nrog lub peev xwm ntsuas ntawm 242Ah ua piv txwv, nyob rau hauv cov xwm txheej ntawm SOC=0% thiab qhov kub thiab txias ntawm 20 degree, cov nqi sib txawv tau siv los them. Cov txiaj ntsig tau pom nyob rau hauv Table 3-1 thiab qhov kev them nyiaj nkhaus yog qhia hauv daim duab 3-12.
Table 3-1 Charging Parameters rau cov nqi sib txawv
| Tam sim no / A (Rate) | CC-CV①Tag nrho Lub Sijhawm | Tsis tu ncua CurrentTime/s | Total ChargedCapacity/A·h | Total ChargedEnergy/W·h | Tsis tu ncua CurrentCharged Capacity/A·h | Tsis tu ncua VoltageCharged Zog / W·h | 170AhTime/s | 170AhCurrent/A |
|---|---|---|---|---|---|---|---|---|
| 4.84/(0.02C) | 182220 | 182220 | 245.74 | 942.54 | 245.74 | 942.54 | 127400 | 4.85 |
| 12.1/(0.05C) | 72318.5 | 72318.5 | 243.70 | 935.37 | 243.70 | 935.37 | 50400 | 12.11 |
| 24.2/(0.1C) | 36206.8 | 35800 | 243.20 | 935.77 | 241.03 | 926.69 | 25200 | 24.24 |
| 48.4/(0.2C) | 18317.5 | 17560 | 241.08 | 933.32 | 236.32 | 912.16 | 12600 | 48.44 |
| 80.7/(0.33C) | 11443.6 | 10490 | 243.50 | 946.27 | 235.29 | 910.08 | 7590 | 80.76 |
| 121/(0.5C) | 7936.6 | 6900 | 243.92 | 952.95 | 232.09 | 900.85 | 5110 | 121.09 |
① CC, Tsis tu ncua tam sim no; CV, tsis tu ncua Voltage.
Raws li pom nyob rau hauv Table 3-1, lub sij hawm tam sim no tsis tu ncua maj mam txo nrog kev nce nqi tam sim no, thiab lub peev xwm thiab lub zog uas tuaj yeem them raws li qhov tam sim no kuj maj mam txo. Siv lub peev xwm them thiab tso tawm ntawm 1/2 (piv txwv li, SOC=50%) raws li tus qauv, lub sijhawm them yuav tsum tau txo qis nrog kev them nqi tam sim no; Lub sij hawm xav tau rau 0.1C yog kwv yees li 5 npaug rau 0.5C. Nyob rau hauv cov xwm txheej no, qhov sib txawv tam sim no rau kev them nyiaj txuas ntxiv yog me me, yog li lub sijhawm them rau 30Ah kawg tsis txawv ntau. Yog li ntawd, nyob rau hauv lub roj teeb uas tso cai rau them tam sim no, ua kom cov nqi them tam sim no, txawm tias txo lub peev xwm thiab lub zog uas tuaj yeem raug them raws li qhov tam sim no, pab txo lub sijhawm them tag nrho. Hauv kev siv cov roj teeb pob siv tau, qhov siab tshaj plaws tso cai them tam sim no ntawm lithium-ion roj teeb tuaj yeem siv rau kev them nyiaj, thiab tom qab ncav cuag qhov ntsuas hluav taws xob, qhov hluav taws xob tas li tuaj yeem ua tiav. Qhov no txo cov sij hawm them nyiaj thaum ua kom muaj kev nyab xeeb ntawm kev them nyiaj. Txawm li cas los xij, kev nce cov nqi them tam sim no kuj yuav ua rau muaj zog poob vim lub roj teeb sab hauv. Lub zog noj nyob rau hauv lub internal kuj yog xam raws li qhov sib npaug (3-4).
Qhov twg E yog lub zog siv los ntawm kev ua haujlwm sab hauv;
r yog lub roj teeb lub zog sab hauv;
t yog lub sijhawm them nyiaj hloov pauv;
Kuv yog tus them tam sim no;
t₁ thiab t₂ yog lub sijhawm pib thiab xaus.
Kev sim dav dav tau pom tias lub zog sab hauv ntawm lithium{0}}ion roj teeb hloov pauv hauv 0.4 mΩ thaum them nyiaj. Yog li ntawd, qhov sib npaug (3-4) qhia tau hais tias lub zog noj vim lub roj teeb sab hauv yog qhov tseem ceeb muaj feem xyuam nrog lub sij hawm them, tab sis quadratically cuam tshuam nrog cov nqi them tam sim no. Thaum lub sij hawm them tam sim no tsis tu ncua, qhov loj ntawm cov nqi them tam sim no yog qhov tseem ceeb cuam tshuam nrog kev siv hluav taws xob sab hauv; kev them nyiaj ntau dua tam sim no ua rau muaj kev siv zog ntau dua. Thaum lub sij hawm tas li voltage, tsis tshua muaj theem tam sim no, lub sij hawm them nyiaj dhau los ua qhov tseem ceeb cuam tshuam nrog kev siv hluav taws xob sab hauv; Lub sijhawm them nyiaj ntev dua ua rau muaj kev siv zog ntau dua. Xav txog tag nrho cov txheej txheem them nqi, txij li cov nqi them tam sim no muaj kev sib raug zoo nrog rau kev siv zog sab hauv thiab yog qhov tseem ceeb cuam tshuam rau nws, kev them nyiaj ntau dua tam sim no ua rau muaj kev siv zog ntau dua. Hauv kev siv roj teeb siv tau, qhov tsim nyog them tam sim no yuav tsum raug xaiv los ntawm kev xav txog ob qho tib si them lub sijhawm thiab kev ua haujlwm.
(2) Qhov cuam tshuam ntawm qhov tob ntawm qhov tso tawm ntawm Kev Ua Haujlwm Raws li qhov ntsuas kub tsis tu ncua ntawm 20 degree, kev kuaj tawm tau ua tiav ntawm NCM lithium{2}}ion roj teeb nrog lub peev xwm ntsuas ntawm 66.2 Ah. Lub roj teeb tau tso tawm ntawm tus nqi ntawm 0.5C mus rau qhov sib txawv ntawm qhov tob ntawm qhov tso tawm (DOD) (10% → 100%), sib xws rau Lub Xeev Tus Nqi (SOC) ntawm 90% → 0%. Voltage, tam sim no, thiab cov ntaub ntawv muaj peev xwm raug kaw thaum lub sijhawm tso tawm. Tom qab so rau 60 feeb, lub roj teeb tau them ntawm tus nqi ntawm 0.5C (CC). Thaum qhov kev txiav tawm hluav taws xob tau mus txog, hom kev them nyiaj tau hloov mus rau qhov tsis tu ncua (CV). Thaum qhov tam sim no tsawg dua 0.05C, cov txheej txheem raug kaw, thiab cov ntaub ntawv voltage, tam sim no, thiab cov ntaub ntawv muaj peev xwm raug kaw. Cov ntaub ntawv cuam tshuam tau qhia hauv Table 3-2. Kev them nyiaj tam sim no ntawm cov roj teeb lithium-ion nyob rau hauv qhov sib txawv ntawm qhov tob ntawm qhov paug tawm tau pom hauv daim duab 3-13.
Table 3-2 Charging Test Parameters ntawm txawv qhov tob ntawm kev tso tawm
| SOC | DOD | Tso tawm | Them nqi | Sib npaug - Peev Xwm Peev Xwm ①/W·h | Sib npaug -CapacityDischarged Energy②/W·h | Them sij hawm / min | Tsis tu ncua CurrentTime/min | Tsis tu ncua CurrentCharged Capacity/A·h | Nruab Nrab Them Nqi Them Nqi Zog ③/min | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Peev xwm / Ah | Zog / W·h | Peev xwm / Ah | Zog / W·h | ||||||||
| 80.00 | 20.00 | 13.35 | 54.03 | 13.48 | 55.88 | 27.94 | 27.02 | 41.13 | 33.50 | 12.32 | 3.05 |
| 70.00 | 30.00 | 20.02 | 80.16 | 19.99 | 82.08 | 27.36 | 26.72 | 59.23 | 50.83 | 18.69 | 2.96 |
| 60.00 | 40.00 | 26.69 | 105.62 | 26.61 | 108.19 | 27.05 | 26.41 | 77.72 | 68.50 | 25.19 | 2.92 |
| 50.00 | 50.00 | 33.36 | 130.42 | 33.27 | 133.61 | 26.72 | 26.08 | 96.02 | 86.67 | 31.87 | 2.89 |
| 40.00 | 60.00 | 40.04 | 154.61 | 39.95 | 158.50 | 26.42 | 25.77 | 114.18 | 104.83 | 38.55 | 2.86 |
| 30.00 | 70.00 | 46.71 | 178.38 | 46.61 | 182.97 | 26.14 | 25.48 | 132.28 | 123.00 | 45.22 | 2.84 |
| 20.00 | 80.00 | 53.38 | 201.73 | 53.26 | 207.07 | 25.88 | 25.22 | 150.40 | 141.00 | 51.84 | 2.82 |
| 10.00 | 90.00 | 60.05 | 224.45 | 59.92 | 230.62 | 25.62 | 24.94 | 168.47 | 159.17 | 58.52 | 2.81 |
① Sib npaug- Peev Xwm Charged Zog: Lub zog them raws li qhov hloov pauv SOC (piv txwv li, 10%). Piv txwv li: yog tias lub peev xwm them ntawm 90% DOD yog 30W·h, qhov sib npaug- lub peev xwm them lub zog yog 30W·h; yog tias lub peev xwm them ntawm 80% DOD yog 50W·h, qhov sib npaug- lub peev xwm them lub zog yog 25W·h.
② Sib npaug- Peev Xwm Tshem Tawm Zog: Lub zog tso tawm raws li kev hloov pauv SOC (piv txwv li, 10%).
③ Lub Sijhawm Them Nruab Nrab ntawm Ib Lub Zog / Min: Lub Sijhawm Them / Them Nqi.
Los ntawm Table 3-2 thiab Daim duab 3-13, cov lus xaus hauv qab no tuaj yeem kos:
1) Nrog rau qhov tob ntawm qhov tso tawm, lub sij hawm them nyiaj nce, tab sis qhov nruab nrab them lub sij hawm ntawm ib chav tsev muaj peev xwm txo qis, txhais tau hais tias qhov nce ntawm lub sij hawm them nyiaj tsis yog proportional rau qhov tob ntawm paug.
2) Nrog rau qhov tob ntawm qhov tso tawm, qhov feem pua ntawm lub sijhawm them tam sim no mus rau tag nrho lub sijhawm them nyiaj nce, thiab qhov feem pua ntawm cov nqi them tam sim no kom muaj peev xwm them tau nce ntxiv. Hauv kev muaj tiag, cov yam ntxwv no feem ntau tshwm sim los ntawm ob yam: ua ntej, qhov tob tob ntawm kev tso tawm yuav tsum tau siv sijhawm ntev dua kom them lub roj teeb; Thib ob, qhov tob tob ntawm qhov tso tawm sib haum mus rau qhov qis qis, ua rau lub zog tsawg dua raug them rau hauv lub roj teeb nyob rau hauv tib lub sijhawm tam sim no thiab them lub sijhawm.
(3) Kev cuam tshuam ntawm qhov kub thiab txias ntawm kev them nqi Lithium - ion roj teeb raug them raws li qhov ntsuas kub sib txawv. Siv 66.2 A·h NCM lithium-ion roj teeb ua piv txwv, siv txoj kev txwv qhov tam sim no thiab qhov hluav taws xob tsis tu ncua. Kev them nyiaj tsis raug kaw nrog qhov txwv tam sim no yog 1.3 A thiab 3.3 A, raws li qhia hauv Table 3-3. Nyob rau hauv tib lub tso tawm tam sim no, lub roj teeb voltage yuav muaj kev poob qis, raws li qhia hauv daim duab 3-13. Txawm li cas los xij, vim tias qhov hluav taws xob tseem nyob hauv siab, lub zog tawm hluav taws xob tseem siab. Nyob rau hauv thawj theem ntawm kev tso tawm, lub zog siv los ntawm lub roj teeb lub zog sab hauv ua rau kom lub roj teeb qhov kub thiab txias, txhim khu kev ua haujlwm ntawm lithium-ion roj teeb cov khoom siv, thiab nce lub roj teeb voltage, yog li nce lub zog uas tuaj yeem tso tawm. Nyob rau hauv nruab nrab thiab tom qab theem ntawm tso tawm, lub roj teeb voltage txo, thiab lub zog tso tawm ib chav tsev lub sij hawm txo raws li.
Nyob rau tib qhov kub thiab nrog tib qhov tso tawm qhov hluav taws xob, qhov sib txawv ntawm qhov kev txiav tawm tam sim no yuav ua rau muaj qhov sib txawv ntawm lub peev xwm thiab lub zog tso tawm. Feem ntau, nyob rau hauv qhov kub thiab txias, qhov qis dua tam sim no, lub peev xwm thiab lub zog tso tawm ntau dua. Raws li nyob rau hauv qhov kev sim tawm tau hais los saum no, 0.2C tso tawm 3.2% ntau lub peev xwm thiab lub zog ntau dua 1C.
