Dɛn na ɛregye current?
Customer yi ne ho adi ne spec sheet a ɔrebisa sɛ wobetumi agye charge wɔ 1C anaa. Wobɛtumi. Nanso 1c yɛ ceiling, ɛnyɛ nyansahyɛ. Nnipa pii nnya saa nsonsonoeɛ yi, anaasɛ wɔnya nanso wɔnnhwɛ. Enkosi sɛ battery no bewu ntɛm na ɛsɛ sɛ obi kyerɛkyerɛ nea ankɔ yiye mu.
Charging current yɛ sɛnea wobɛpia anyinam ahoɔden ntɛmntɛm akɔ batere no mu. Amperes. Sɛ wohwɛ amps nkutoo a mfaso nni so, ɛsɛ sɛ wuhu abusuabɔ a ɛda tumi. 100AH battery a ɛwɔ 100a no ntam no yɛ 1c, wɔ nsusuwii mu no, ɛyɛ ma wɔ dɔnhwerew biako mu. Wɔ 50A no ɛyɛ 0.5C, nnɔnhwerew abien. 18650 nkwammoaa a wɔakyerɛ sɛ ɛyɛ 2600mAh, 0.5C kyerɛ 1.3A. C-rate yɛ nnwuma mu gyinapɛn kwan a wɔfa so de batere ahorow a ne kɛse yɛ pɛ toto ho wɔ kwan a ɛyɛ pɛ so.
Lithium batere dodow no ara yɛ yiye wɔ 0.5C mu ma wɔde di dwuma da biara da. Yɛayɛ forklift battery bere tenten a ɛbɛma yɛahu packs pii a 1C charge akum no. Ɛnyɛ sɛ 1c ntumi nyɛ adwuma, bere tiaa mu no ɛyɛ papa, nanso wɔ kyinhyia ahanu anaa anum akyi no nsonsonoe no da adi. 0.5C packs no da so ara retu mmirika denneennen, 1C no dedaw no so tew tumi. Wubetumi akyerɛkyerɛ chemistry no mu nyinaa a wopɛ, nkurɔfo nnye nni kosi sɛ wobehu data no afi wɔn ankasa po so ahyɛn mu.
Dɛn nti na eyi si? Ɛsɛ sɛ lithium ions no hyɛ graphite layers a ɛwɔ anode no so no mu bere a wɔrebɔ no. current dodo, ions ntumi nhyehyɛ ntɛmntɛm sɛnea ɛbɛyɛ a ɛbɛkɔ mu, ɛboaboa ano wɔ soro sɛ dade lithium mmom. Metallic lithium nyin yɛ dendrites, pokes fa separator no mu, internal short circuit, thermal runaway. Battery factory nsɛm a esisi no yɛ nsɛm ho amanneɛbɔ asram kakraa biara mprempren. Mpɛn pii no nneɛma pii a ɛde ba, nanso nsɛm a ɛfa ho no da adi wɔ ntini no mu nhwehwɛmu no mu mpɛn pii sen sɛnea wɔn a wɔyɛ no pɛ sɛ wogye tom.
Lithium battery a wɔde charge no wɔ afã abiɛsa.
Obiara a ɔwɔ adwuma no mu nim eyi nanso ɛnyɛ obiara na ɔde n’adwene si abiɛsa no nyinaa so.
Pre-gye .
Voltage a ɛwɔ 3V ase no, worentumi mfa current a edi mũ nkɔbɔ no. Anode material structure nya unstable bere a deep discharge akyi, a ɛhyɛ current wɔ ma irreversible damage. Pre-charge stage de bɛyɛ 10% a ɛyɛ normal current di dwuma, nkakrankakra de voltage san ba soro. Ebia 0.05C kosi sɛ voltage bɛsan aba bio. Lots of cheap chargers skip eyi koraa. Battery tena awɔw bere nyinaa mu wɔ adekoradan a wɔanhyew mu, voltage drops to 2-point-biribi, spring ba na obi plugs no straight in at full current. Asram asia akyi no, ɔhaw ahorow fi ase da adi. Yehu saa nhyehyɛe yi afe biara fi atifi fam adetɔfo hɔ. Nkɔmmɔbɔ koro no ara, nea efi mu ba koro no ara.
Mprempren mprempren .
Constant current stage yɛ heavy lifting no. Mprempren a ɛkɔ so siesie bere a voltage foro kɔ soro no, 0.5C ma wudu bɛyɛ 80% wɔ nea ennu nnɔnhwerew abien mu. Eyi ne baabi a ahoɔden dodow no ara kɔ mu Ɛnyɛ pii a wobɛkyerɛkyerɛ mu afa ɔfã yi ho, ɛyɛ adwuma sɛnea wobɛhwɛ kwan no.
ahoɔden a ɛkɔ so daa .
Constant voltage stage yɛ nea nkurɔfo ani gye ho sɛ wobehuruw. Afei voltage bɔ ceiling-4.2V wɔ cell biara ma ternary chemisries te sɛ NMC, 3.65V ma LFP-current ɛsɛ sɛ ɛyɛ teateaa wɔ n’ankasa so. Voltage kura steady, current drops bere a cell no bɛn ma, termination at around 0.01C. Saa 2600mAh 18650 no kyerɛ bɛyɛ 26mA wɔ awiei pɛɛ. Saa fã yi gye bɛyɛ dɔnhwerew biako. Sɛ worehwɛ dɔn no na wuhia forklift no asan akɔ fam a, saa phase yi twa tiaa. Result is either 10-15% undercharged anaasɛ woresi so dua sɛ cathode no rebɔ mmɔden sɛ ɔbɛhyɛ tumi pii wɔ mu.
Ɔhyew mu ade .
Ɔhyew sesa nneɛma. Cold electrolyte yɛ viscous, ions ntumi nkɔ yiye. 0.5C koro no ara a ɛyɛ adwuma yiye wɔ dan mu hyew mu no betumi ama lithium plating aba fam wɔ nwini ase. Cold storage ne frigye warehouse applications hia battery a heating systems asisi mu.ma nkwammoaa yɛ hyew anyɛ yiye koraa no 5℃ansa na woagye charge current. Adetɔfo susuw sɛ ɔhyew ho ka a ɛho nhia kosi sɛ batere bewuwu ntɛm. Afei wɔba bebisa nea enti a obiara ammɔ wɔn kɔkɔ. Yɛbɔɔ wɔn kɔkɔ ampa. Spec sheet no ka sɛ adwumayɛ mu ɔhyew a ɛwɔ hɔ no yɛ nea enti.
LFP di ayayade ho dwuma yiye sen Ternary, nea enti a edi tumi wɔ honam fam nneɛma ho dwuma mu mprempren no fã. Nkwammoaa bi a wɔakyerɛ sɛ ɛyɛ 15C a wɔde charge. can handle it’t mean ɛsɛ sɛ ɛyɛ. Yɛde ntotoho sɔhwɛ ahorow, 1C vs 0.5C bere tenten charge, mfe abien a ɛne no sɛ cycling. Na tumi mu nsonsonoe yɛ 8-12% a egyina sɛnea wɔhwɛ ɔhyew so yiye so. Ɛnyɛ catastrophic nanso ɛno yɛ sika ankasa bere a worehwɛ po so ahyɛn a wɔde besi ananmu ho ka.
Asiane a ɛwɔ adwumayɛ mu .
Asɛm foforo a ɛba bere nyinaa ne charger matching. 0.5C charger a wɔasi ama 200AH no 100A. Swap wɔ 100ah replacement battery mu na mpofirim ara na wowɔ 1c sɛ woabɔ wo tirim sɛ anaasɛ woanyɛ saa. Ɛsi bere nyinaa wɔ nnwinnadeɛ a wɔayɛ no foforɔ ne batere a wɔde sesa mu. Obiara nhwɛ sɛ charger no da so ara fata ma pack foforo no anaa. Battery yɛ adwuma yiye kosi sɛ ɛrenyɛ yiye.
Asɛm bi wɔ hɔ wɔ forklift battery adwuma no mu, battery ho ka yɛ 30% wɔ lɔre no nyinaa mu. OSHA wɔ mmara pɔtee bi a ɛfa mmeae a wɔbɔ ka ho, 1910.178, ahwehwɛde ahorow a ɛfa hydrogen mframa a wɔde ma ho, mmeae a wɔde aniwa hohoro, acid a wɔde di dwuma. Lead-Acid Era Na eyinom yɛ ahyɛde efisɛ hydrogen gas a ɛboaboa ano bere a wɔrebɔ charge no yɛ nea ɛpae. Lithium Era Hydrogen haw no kɔe nanso thermal runaway asiane no sesae ara kwa. Asiane soronko, ɛda so ara hia sɛ wɔde wɔn adwene si so.
Charging current yɛ nɔma bi a ɛwɔ spec krataa no so ara kwa. Nea ɛwɔ n’akyi ne bere tenten a wo battery no bɛkɔ so atra hɔ ne sɛ ebia biribi ankɔ yiye ansa na ɛsɛ sɛ ɛba. Nya nea wɔpaw no yiye bere a worekyerɛ nnwinnade, a ne bo nyɛ den sen sɛ wode batere besi ananmu bere a ɔhaw ahorow aba akyi no.
