Dɛn Ne Plastic Hot Sealing a Wɔde Siesie Lithium-ion Batere?
Pouch cell huammɔdi wɔ afuw mu? Bɛyɛ 60-70% hwehwɛ ɔhaw ahorow a ɛfa nsɔano ho. Ɛnyɛ cathode no, ɛnyɛ separator no, ɛnyɛ BMS no mpo-film abien pɛ a na ɛnkyekyere yiye. Hot sealing nya ebia nkratafa abien wɔ battery adesua nhoma dodow no ara mu, nanso ɛde warranty ho nsɛm pii ba sen sɛnea nkurɔfo pɛ sɛ wogye tom.
Sini a Ɛyɛ Adwuma Nyinaa
Aluminium laminate film wɔ nnwuma abiɛsa a wɔaboaboa ano wɔ ade biako mu. Nylon a ɛwɔ akyi no gye nsensanee na esiw oxygen kwan. Mfinimfini aluminium layer ma nsuo gyae-eyi ne akwansideɛ ankasa, ɛfiri sɛ nsuo a ɛyɛ hyew nketenkete mpo ne LiPF6 yɛ adwuma ma ɛyɛ HF mframa. CPP a ɛwɔ mu (cast polypropylene) no nwene bere a wɔretoto mu no ma ɛyɛ abusuabɔ ankasa.
Ɛte sɛ nea ɛyɛ tẽẽ. Wɔ nneyɛe mu no, sɛ wobɛma layers abiɛsa no nyinaa ayɛ biako wɔ 2-3 second sealing cycle mu a, egye process control pii sen sɛnea adwumayɛ dodow no ara hwɛ kwan bere a wodi kan de pouch line si hɔ no.
DNP, Showa Denko, ne Youlchon da so ara de laminate sini a ɛyɛ fɛ no mu dodow no ara ma wɔ wiase nyinaa. Chinafoɔ a wɔyɛ nneɛma-Zijiang, Daoming, ne afoforɔ kakraa bi-atoto nsonsonoeɛ no mu wɔ mfimfini-tier applications mu, ɛwom sɛ high-cycle-nkwa nkwammoaa no da so ara taa spec Japanese anaa Korean sini. Nneɛma a wɔpaw no nya nsɔano nneyɛe so nkɛntɛnso kɛse sen sɛnea datasheets no kyerɛ.
Sɛnea Nsɔano Yɛ Adwuma Ankasa
Nnua abien a ɛyɛ hyew, atifi ne ase, mia laminate sini a wɔabobɔw no. Ɔhyew no yɛ digrii 185 kosi digrii 225 wɔ bar no ani. Nanso nea mfiri ho nhoma ahorow no nsi so dua ni: CPP layer hyew kowie bɛyɛ digrii 10 a ɛba fam sen bar hyew efisɛ ɔhyew fa nylon ne aluminium mu kan. Digrii 215 setpoint kyerɛ bɛyɛ digrii 205 wɔ bonding interface ankasa no so.
Side seals run cooler-185℃yɛ nea ɛtaa ba efisɛ ɛyɛ film-to-film bonding kɛkɛ. Top seals hia 210-220℃efisɛ electrode tabs punch fa package no mu na tab sealant film de thermal mass ka ho. Saa sealant (mpɛn pii no PP a wɔasesa) no ɛsɛ sɛ ɛkyekyere bere koro mu wɔ dade tab no ani ne CPP layer no so. Nkitahodi ahorow abiɛsa, nsɔano kyinhyia biako.
Fusion adwinnade no fa polymer nkɔnsɔnkɔnsɔn interdiffusion ho. CPP du viscous flow tebea mu, nkɔnsɔnkɔnsɔn tu fa interface no so wɔ nhyɛso ase, afei ɛkyekyere bere a biribiara dwo no. DSC curves ma aguadi laminate film dodow no ara kyerɛ melt window a ɛwɔ 160℃ne 215℃ntam -endothermic peaks abien a ɛhyɛ ahye no agyirae. Adwumayɛ a wɔbɛyɛ wɔ saa mmepɔw no ntam no ne botae no.
Baabi a Nneɛma a Wɔyɛ no Di Aperepere
Tab seal a ɛyɛ fĩ
ranks sɛ huammɔdi kwan a ɛtaa ba. Electrolyte a wɔde ahyɛ mu ma no ba ansa na wɔasɔw ano awiei koraa, na nkae biara a ɛwɔ nsɔano no ani no kunkum ahoɔden a ɛka bom no. Solvent vapor mpo betumi asesa CPP soro ahoɔden araa ma ɛde ɔhaw ahorow bɛba. Nnwumayɛbea ahorow bi de IPA popa mmeae a wɔde nsɔano ayɛ; adwumayɛ a eye kyɛn so di nsu a ɛyɛ nwini so na wɔde mmeae a ɛho tew a wɔahyira so di dwuma ma nsɔano anammɔn a etwa to no. BIlithium battery pack a wɔde maa ɛwɔ afuo mu ahotosoɔ a ɛkorɔn taa wɔ protocols a ɛyɛ katee wɔ ha-fata sɛ wobisa ho asɛm wɔ bere a worefata.
Ɔhyew a ɛyɛ pɛ wɔ sealing bar no ho
de pow pii ba sen sɛnea nnipa dodow no ara hu. Ɔhyew nneɛma nkyekyɛ pɛpɛɛpɛ wɔ bar tenten mu. Ntini a ɛyɛ nwini ma fusion a enni mũ; mmeae a ɛyɛ hyew ma squeeze-out baabi a wɔpia CPP a ayɛ hyew fi seal zone no, na ɛma mmeae a ɛyɛ mmerɛw a ɛyɛ tratraa a ɛpaapae bere a onwini no. Multi-zone temperature control boa, nanso nhama pii da so ara tu mmirika single-zone bars na wogye scrap rates a ɛkorɔn kɛkɛ.
Pia-fi mu na micro-krak
ɛba bere a ɔhyew anaa nhyɛso kɔ soro dodo no. Polymer a ayɛ nwini nni baabiara a ɛbɛkɔ gye sɛ efi nsɔano beae no nkyɛnkyɛn. Nneɛma a aka a ɛyɛ tratraa no nya nhyɛso mu mpaapaemu wɔ onwini bere mu-ɛtɔ mmere bi a wohu wɔ kɛseyɛ ase, ɛtɔ mmere bi a ɛnte saa. Eyinom bɛyɛ akwan a nsu a ɛtwetwe bere kɔ so no. Profiled sealing heads a ɛwɔ ridges ne channels hwɛ nneɛma a ɛsen so yiye sen flat bars, ɛwom sɛ ɛho ka dɔɔso na ɛhwehwɛ sɛ wɔde tolerances a emu yɛ den ma wɔ nhyehyɛe mu de.
Tab a wɔde ntama ayɛ delamination
yi adi wɔ asram pii akyi wɔ nkwammoaa a wɔde fa po so hyɛn mu akyi. Ɛsɛ sɛ sealant film a ɛwɔ electrode tabs so no bata dade-ne-adhesive, adhesive-to-adhesive (baabi a layers hyia), ne adhesive-to-CPP. Sɛ woyera interface biara a, ɛkyerɛ sɛ awiei koraa no electrolyte wicks fa tab no so. Nkwammoaa no twa nsu a ɛtwetwe ho sɔhwɛ a edi kan no mu, afei wodi nkogu wɔ afuw mu bere a awiei koraa no, nea ɛtwetwe brɛoo no bubu no. Onyin ho sɔhwɛ ahorow a wɔyɛ no ntɛmntɛm no kyere eyinom bi, nanso ɛnyɛ ne nyinaa.
Dry vs Ɔhyew Lamination Sini ahorow
Sɛnea wɔyɛɛ laminate sini no ankasa ka sɛnea wɔde nsɔano yɛ.
Ɔhyew lamination de MPP adhesive kyekyere CPP wɔ aluminium mu wɔ ɔhyew ne nhyɛso ase. Adeyɛ no yɛ adwuma nanso ɔhyew a wɔde hyɛ mu no betumi asɛe ade a wɔde nkata so no. Bilithium batere a wɔde yɛ OEMnhyehyɛe ahorow adan akɔ dry lamination films-adhesive cures wɔ ɔhyew a ɛba fam, tra hɔ a ɛyɛ mmerɛw kɛse, di deep draws ho dwuma yiye.
Dry-process films taa ma mfɛnsere a ɛtrɛw a wɔde siw ano. Ɛtɔ da bi a thermal-process films kyerɛ edge-case cracking bere a ɛreyɛ adwuma a anka ɛrensi wɔ dry film mu. Ɛnkyerɛ sɛ thermal yɛ bɔne; nkwammoaa a ɛwɔ volume a ɛkorɔn-dɔɔso pii de di dwuma yiye. Nanso sɛ ɔhaw ahorow a ɛfa nsɔano ho ba na biribi foforo biara nkyerɛkyerɛ mu a, ɛfata sɛ wɔhwehwɛ ɔkwan a wɔfa so yɛ sini no mu.
Nnwinnade Ho Nsɛm a Wɔakyerɛw
Upper sealing bar taa tu mmirika sɛ "hann bar" a ɛyɛ torotoro a wɔde PTFE tape abɔ mu. Teflon siw nea ɛbɛbata bere a polymer piapia no ano, ɛma wogyae wɔ kyinhyia biara akyi, na ɛboa ma ɔhyew kyekyɛ mpo kakra. Teyp no sɛe na ɛhia sɛ wɔsesa no daa-PTFE a efĩ anaa asɛe no da adi sɛ soro agyiraeɛhyɛdeɛ wɔ sini a wɔatoto mu so.
Mpɛn pii no, ase bar no wɔ profiled surface a ɛwɔ mfinimfini kwan, a wɔde silicone rɔba adura ho. Silicone no ma wodi mmara so de di nsakrae a ɛba wɔ kɛseyɛ mu fi tab mmeae ahorow ho dwuma. Sɛ saa mmara no nni hɔ a, nhyɛso kyekyɛ no nkɔ pɛpɛɛpɛ na bond ahoɔden gu ahorow wɔ nsɔano no trɛw mu.
Asymmetric design-smooth top, profiled bottom-ma nhyɛsoɔ a wɔahyɛ so sen sɛ ɛbɛma ahoɔden a wɔde kyekyere kɛkɛ. Setup ho hia wɔ ha; milimita nkyem du mu kakraa bi a ɛba wɔ nsakrae a ɛba wɔ bar alignment mu no mu ba no yɛ nea ɛda adi.
Nsɛmmisa a Ɛda Process Maturity adi
Bere a supplier qualification, saa nsemmisa yi taa tetew oprehyɛn a anibere wom fi nea ɛbɛma warranty tiyɛ aba no ho:
Biaraamanne kwan so lithium batere a wɔde mayɛ ankasa process engineering betumi abua eyinom pɔtee. Ebia wɔn a wontumi nyɛ no de adwuma rema afoforo sen sɛnea wogye tom.
Supply Chain Nokwasɛm a Ɛyɛ
Wɔ nkwammoaa a ɛkɔ mfiridwuma nnwinnade mu-forklifts, AGVs, wim lifts, fam scrubbers-nneɛma no su ka nkwa nna mu ka sen adetɔ bo. BIlithium battery a wɔtɔn no kɛseakontaabu a egyina $/kWh nkutoo so no hwere asɛm no sɛ nsɔano huammɔdi ma ɔsom frɛ kɔ soro wɔ afe abiɛsa mu a.
Japanfo ne Koreafo sini ahorow a wɔde laminate ayɛ no bo yɛ den sen saa. Wɔn nso di nkogu kakraa bi. Chinafoɔ sini yɛ adwuma yie ma -kyinhyia dwumadie tiawa anaa baabi a ɛka nhyɛsoɔ di tumi. Fa material spec hyia ankasa use case sen sɛ wobɛ default akɔ cheapest-a ɛwɔ hɔ.
Wɔn a wɔyɛ lithium baterea wɔwɔ in-house sealing nimdeɛ taa yɛ sourcing gyinaesi pa wɔ ha. Wɔn a wɔtɔ turnkey lines na wɔtu mmirika sini biara a mfiri tɔnfoɔ no de nyansahyɛ maeɛ... nea ɛfiri mu ba no gu ahodoɔ.
Nsɔano nyɛ den wɔ adwene-ɔhyew, nhyɛso, onwini mu. Sɛ́ wobenya no yiye wɔ dodow a wɔyɛ mu, a tab penetrations, electrolyte efĩ asiane ahorow, ne thermal gradients, gye nhyehyɛe nteɛso pii sen sɛnea ɛnyɛ den no kyerɛ. Field reliability tracks pretty closely ne sɛnea manufacturer bi de adwene si anammɔn yi so.
