Dɛn ne charge ne discharge su?
charge na .yi noesu
Lithium-ion batere taa de Two-afã a wɔde charge di dwuma de hwɛ hu sɛ ahobammɔ, ahotoso, ne charge a ɛyɛ adwuma yiye. Stage a edi kan no yɛ daa current a voltage anohyeto, na second stage no yɛ constant voltage a current anohyeto. Voltage anohyeto a ɛsen biara a wɔde charge lithium-ion battery no gu ahorow gyina cathode ade no so. Lithium-ion battery no mu ahoɔden a ɛyɛ den/discharge curves no yɛ nea wɔakyerɛ wɔ Mfonini 3-11 mu. Curves a ɛwɔ mfonini no mu no de charge/discharge current a ɛwɔ C/3 di dwuma. Wɔ lithium-ion batere ahorow ho no, nsonsonoe atitiriw no yɛ abien:
1) Constant current value a eye sen biara ma stage a edi kan no gu ahorow gyina battery no cathode ade ne ne yɛ so. Mpɛn pii no, wɔde mprempren kwan a ɛyɛ 0.2C kosi 0.3C di dwuma. Wɔ nsɛm a ɛfa ahoɔden a wɔde di dwuma ntɛmntɛm ho no, wobetumi de 1C, 2C, anaa mpo dodow a ɛkɔ soro adi dwuma.
2) Lithium-ion batere ahorow da nsonsonoe kɛse adi wɔ mprempren bere tenten a ɛkɔ so daa no mu, na tumi no fã a wobetumi de mprempren a ɛkɔ so daa no abɔ ho ka wɔ tumi a ɛwɔ hɔ nyinaa mu no nso gu ahorow kɛse. Sɛ yɛhwɛ anyinam ahoɔden kar a wɔde di dwuma a mfaso wɔ so a, mprempren bere tenten a ɛkɔ so daa no de bere tiaa a wɔde bɔ kar no nyinaa ba, a mfaso wɔ so kɛse ma dwumadie.
Lithium-ion battery voltage no gyina na ɛso tew nkakrankakra wɔ discharge mfiase ne mfinimfini, nanso ɛkɔ fam ntɛmntɛm wɔ akyiri yi fã ahorow no mu, sɛnea wɔada no adi wɔ Segment DE a ɛwɔ Mfonini 3-11 mu no. Nkonimdi a etu mpɔn ho hia kɛse wɔ saa gyinabea yi mu na amma batere no agyae dodo na asɛe a wontumi nsakra no.
Nneɛma a ɛka charge su ahorow .
(1) Nkɛntɛnso a ɛwɔ .Charging current .Wɔ charge su a ɛfa NCM lithium-ion battery pɔtee bi a ɛwɔ tumi a wɔakyerɛ sɛ ɛyɛ 242a·h sɛ nhwɛso no, wɔ tebea horow a ɛwɔ SOC=0% ne daa ɔhyew a ɛyɛ 20℃, na wɔde charge rates ahorow dii dwuma de bɔɔ charge. Parameter results no yε כ Table 3-1 na charging curve no yε כ kyerε wכ Mfonini 3-12 mu.
Table 3-1 charging parameters ma charge rates ahorow .
| Mprempren/A(ɔboɔ) . | CC-CV1 bere nyinaa . | Bere nyinaa bere a ɛwɔ hɔ/s . | Nneɛma a wɔde ahyɛ mu nyinaa/A·H . | Total chargeEnergy/W·H . | Daa current a wɔbɔ ho ka/A·H . | Ahoɔden/W·H ahoɔden a ɛwɔ ahoɔden mu daa . | 170a·htime/s . | 170A·Hcurrent/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, current a ɛkɔ so daa; CV, ahoɔden a ɛkɔ so daa.
Sɛnea wɔada no adi wɔ Table 3-1 mu no, mprempren bere a ɛkɔ so daa no so tew nkakrankakra bere a charging current kɔ soro no, na tumi ne ahoɔden a wobetumi de ahyɛ mu wɔ current a ɛkɔ so daa ase no nso so tew nkakrankakra. Fa charge ne discharging tumi a ɛyɛ 1/2 (kyerɛ sɛ, SOC=50%) sɛ gyinapɛn no, charge bere a wɔhwehwɛ no so tew bere a charge current kɔ soro no; Bere a ɛho hia ma 0.1C no bɛyɛ mpɛn 5 sen 0.5C. Wɔ saa tebea yi mu no, mprempren nsonsonoe a ɛwɔ sɛ wɔkɔ so gye sika no sua, enti bere a wɔde gye sika ma 30A·H a etwa to no nyɛ soronko koraa. Enti, wɔ battery no charging current a wɔma ho kwan no mu, a ɛma charging current no kɔ soro, ɛwom sɛ ɛtew tumi ne ahoɔden a wobetumi de ahyɛ mu wɔ current a ɛkɔ so daa ase de, nanso ɛboa ma bere a wɔde charge no nyinaa so tew. Wɔ battery pack dwumadie a ɛyɛ adwuma mu no, wobetumi de lithium-ion battery no charging current a ɛboro so no adi dwuma ama charge, na sɛ wɔduru voltage anohyetoɔ no so wie a, wobetumi ayɛ constant voltage charging. Eyi ma bere a wɔde gye sika no so tew bere a ɛhwɛ ma wonya ahobammɔ no. Nanso, charging current a wɔbɛma akɔ soro no nso bɛma ahoɔden a ɛyera no akɔ soro esiane battery no mu ahoɔden a ɛko tia nti. Wɔbu ahoɔden a wɔde di dwuma wɔ mu resistance no ho akontaa sɛnea equation (3-4) kyerɛ no.
baabi a E yɛ ahoɔden a ɛwɔ mu a ɛko tia no;
R yɛ batere no mu ahoɔden a ɛko tia;
T yɛ charging time variable;
Me ne charging current;
T1 ne T2 yɛ charge mfiase ne awiei bere.
Sɔhwɛ a ɛkɔ akyiri ada no adi sɛ lithium-ion batere no mu ahoɔden a ɛko tia no sesa wɔ 0.4 mΩ mu bere a wɔrebɔ charge no. Enti, equation (3-4) kyerɛ sɛ ahoɔden a wɔde di dwuma esiane battery mu resistance nti no titiriw ne charging bere wɔ linearly, nanso ɛfa quadratically abusuabɔ a ɛne charging current no wɔ abusuabɔ. Wɔ daa current charging stage mu no, charging current no kɛseyɛ ne ade titiriw a ɛwɔ nkɛntɛnso wɔ mu resistance ahoɔden a wɔde di dwuma no so; Charging current a ɛkorɔn no ma ahoɔden a wɔde di dwuma kɛse ba. Wɔ daa voltage, low current stage, charging bere bɛyɛ ade titiriw a ɛwɔ nkɛntɛnso wɔ mu resistance ahoɔden a wɔde di dwuma; Bere tenten a wɔde bɔ ka no ma ahoɔden a wɔde di dwuma kɛse ba. Sɛ yɛhwɛ charge nhyehyɛe no nyinaa a, esiane sɛ charging current no wɔ quadratic abusuabɔ a ɛne emu resistance ahoɔden a wɔde di dwuma no wɔ na ɛyɛ ade titiriw a ɛka no nti, charge current a ɛkorɔn no de ahoɔden a ɛwɔ mu no ahoɔden a wɔde di dwuma kɛse ba. Wɔ battery a wɔde di dwuma yiye mu no, ɛsɛ sɛ wɔpaw charging current a ɛfata denam bere a wɔde bɛbɔ ka ne sɛnea ɛyɛ adwuma yiye no nyinaa a wobesusuw ho yiye no so.
(2) Effect of depth of discharge on charging characteristics under a constant temperature of 20℃, wɔyɛɛ nsuo a ɛfiri nsuo mu ho sɔhwɛ wɔ NCM lithium-ion battery a ɛwɔ tumi a wɔakyerɛ sɛ ɛyɛ 66.2 A·h. Wɔde batere no too nsuo mu wɔ 0.5C mu kɔɔ nsuo a ɛfiri nsuo mu (DOD) (10%→100%) mu, a ɛne tebea a ɛwɔ ahoɔden (SOC) a ɛyɛ 90%→0% hyia. Wɔkyerɛw voltage, current, ne capacity data wɔ bere a wɔreyɛ adwuma no. Bere a wɔagye wɔn ahome simma 60 akyi no, wɔde batere no bɔɔ ka 0.5C (CC). Bere a woduu cutoff voltage no ho no, wɔdan charging mode no kɔɔ constant voltage (CV) so. Bere a current no nnu 0.05C no, wogyaee adeyɛ no, na wɔkyerɛw voltage, current, ne capacity data. Data a ɛfa ho no wɔakyerɛ wɔ Table 3-2. Lithium-ion battery no charging curves a ɛwɔ discharge tebea horow no mu bun ahorow mu no wɔakyerɛ wɔ Mfonini 3-13 mu.
Table 3-2 charging test parameters wɔ discharge no mu bun soronko mu .
| Soc . | Dod . | Yi no | Kwaadu | Ɛyɛ pɛ-Capacitycharged ahoɔden1 . | Ɛyɛ pɛ-CapacityDischarged ahoɔden②/w·h . | chargingtime/min . | Bere nyinaa bere a ɛwɔ hɔ/min . | Daa current a wɔbɔ ho ka/A·H . | Sɛ wɔkyekyem pɛpɛɛpɛ a, charging timeper unit no tumi ③/min . | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Tumi/a·h . | Ahoɔden/W·H . | Tumi/a·h . | Ahoɔden/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 Equal-Ahoɔden a ɛwɔ ahoɔden: ahoɔden a wɔde ahyɛ mu wɔ SOC nsakraeɛ korɔ no ara ase (sɛ nhwɛsoɔ, 10%). Sɛ nhwɛsoɔ: Sɛ charge tumi a ɛwɔ 90% DOD no yɛ 30W·h a, equal-tumi a ɛwɔ ahoɔden a ɛwɔ ahoɔden no yɛ 30W·h; Sɛ charge tumi a ɛwɔ 80% DOD no yɛ 50W·h a, equal-tumi ahoɔden a ɛwɔ ahoɔden no yɛ 25W·h.
.
3 sɛ wɔkyekyem pɛpɛɛpɛ a, bere a wɔde bɔ ka wɔ unit biara mu /min: bere a wɔde bɔ ka / ahoɔden a wɔde bɔ ka.
Efi Table 3-2 ne Mfonini 3-13 mu no, wobetumi de nsɛm a edidi so yi aba awiei:
1) Ɛnam sɛ nsuo a ɛfiri mu no mu dɔ kɔ soro nti, berɛ a wɔde gye sika no kɔ soro, nanso sɛ wɔkyekyɛ mu a, berɛ a wɔde gye sika wɔ afiri biara mu no so tew, a ɛkyerɛ sɛ bere a wɔde bɔ no kɔ soro no ne nsuo a ɛfiri nsuo mu no mu dɔ no nhyia.
2) Ɛnam sɛ ɛkɔ soro deep of discharge nti, constant current charging time no fã a ɛkɔ so kɔ total charging time no kɔ soro, na constant current charging capacity no fã no kɔ soro. Nokwarem no, nneɛma abien titiriw na ɛde saa su ahorow yi ba: nea edi kan no, nsu a ɛkɔ akyiri a ɛkɔ akyiri no hwehwɛ bere tenten na ama batere no ayɛ kɛse koraa; Nea ɛto so abien no, nsu a ɛkɔ akyiri a ɛkɔ akyiri no ne ahoɔden a ɛba fam no hyia, na ɛma ahoɔden kakraa bi na ɛde ba batere no mu wɔ current ne charge bere tebea koro no ara mu.
(3) Nsunsuansoɔ a ɛwɔ ɔhyeɛ so wɔ charge su lithium-ion battery so no, wɔde charge wɔ ambient temperature ahodoɔ ase. Fa 66.2 A·H NCM lithium-ion battery sɛ nhwɛsoɔ no, wɔde current ne voltage limiting kwan a ɛkɔ so daa dii dwuma. Wɔkyerɛw charge parameters a charging current anohyeto no yɛ 1.3 A ne 3.3 A, sɛnea wɔakyerɛ wɔ Table 3-3 no. Wɔ saa discharge current koro no ara ase no, battery voltage no bɛnya drop a ɛyɛ nnam, sɛdeɛ wɔakyerɛ wɔ Mfonini 3-13 no. Nanso, esiane sɛ ahoɔden no kɔ so yɛ kɛse nti, ahoɔden a ɛma nsu fi mu ba no da so ara yɛ kɛse. Wɔ afiri a edi kan a ɛma nsu no fi mu no mu no, ahoɔden a batere no mu ahoɔden a ɛko tia no de di dwuma no ma batere no hyew yɛ kɛse, ɛma lithium-ion batere no nneɛma a ɛyɛ adwuma no dwumadi yɛ kɛse, na ɛma batere no ahoɔden kɔ soro, na ɛnam so ma ahoɔden a wotumi yi fi mu no yɛ kɛse. Wɔ mfinimfini ne akyiri yi stages a discharge, battery voltage so tew, na ahoɔden a woyi fi mu wɔ unit bere biara mu no so tew sɛnea ɛfata.
Wɔ ɔhyew koro no ara mu na ɛwɔ discharge termination voltage koro no ara no, discharge termination currents ahorow no bɛma nsonsonoe aba wɔ tumi ne ahoɔden a wɔayi no adi no mu. Mpɛn pii no, wɔ ɔhyew tebea a ɛfata mu no, dodow no ara na current no sua, dodow no ara na tumi ne ahoɔden a ɛba no yɛ kɛse. Sɛnea ɛte wɔ nsu a wɔde fi ayaresabea a yɛaka ho asɛm wɔ atifi hɔ no mu no, 0.2C yi tumi ne ahoɔden 3.2% sen 1C.
