Nhanho yekupedzisira mukugadzirwa kwe lithium bhatiri ndeyekugiresa uye kuvharidzira iyo lithium bhatiri kuti ive nechokwadi chekuenderana kwebhatiri module uye kuita kwakanakisa kwebhatiri module. Sezvinozivikanwa kune vese, mamodule anoumbwa nemabhatiri ane kuenderana kwakanyanya ane hupenyu hwesevhisi hurefu, nepo ma modules ane hurombo hunoenderana anowanzo wedzera-chaji uye yakawandisa-kuburitsa nekuda kwekuita kwebhakiti, uye hupenyu hwavo hwebhatiri hunowedzera kukurumidza. Semuyenzaniso, mabhatiri akasiyana anogona kukonzera kubuda kwakasiyana kwakadzama kwetambo yega yega yebhatiri. Iwo mabhatiri ane diki diki uye kusashanda zvakanaka achasvika kuzara kuchaja nyika pamberi. Nekuda kweizvozvo, mabhatiri ane hukuru hukuru uye kuita kwakanaka haakwanise kusvika kune yakazara charge state. Kusapindirana kwebhatiri voltages kunoita kuti bhatiri rimwe nerimwe riri mutambo inofambirana richajine rimwe nerimwe. Bhatiri rine simba repamusoro rinochaja bhatiri nemhepo yakaderera, iyo inokurumidza kukurumidza kuparara kwebhatiri uye inopedza simba retambo yose yebhatiri. Bhatiri rine chiyero chepamusoro-chekuzvibvisa chine simba guru rekurasikirwa. Kusapindirana kwemitengo yekuzviburitsa kunokonzera misiyano yechaji chimiro uye voltage yemabhatiri, inokanganisa kushanda kwetambo dzebhatiri. Uye saka iyi misiyano yebhatiri, kushandiswa kwenguva refu kuchakanganisa hupenyu hweiyo module yese.

Mufananidzo

FIG. 1.OCV- inoshanda voltage – polarization voltage diagram

Kusarudzwa kwebhatiri uye kuongorora ndekwekudzivirira kubuda kwemabhatiri asingaenderane panguva imwe chete. Iyo bhatiri yemukati kuramba uye yekuzviburitsa bvunzo inofanirwa. Kazhinji kutaura, bhatiri yemukati kuramba yakakamurwa kuita ohm yemukati kuramba uye polarization yemukati kuramba. Ohm yemukati kuramba ine electrode zvinhu, electrolyte, diaphragm kuramba uye kubata kuramba kwechikamu chimwe nechimwe, kusanganisira yemagetsi impedance, ionic impedance uye kubata impedance. Polarization yemukati kuramba inoreva kushorwa kunokonzerwa nekupolarization panguva ye electrochemical reaction, kusanganisira electrochemical polarization yemukati kuramba uye concentration polarization yemukati kuramba. Iyo ohmic kuramba kwebhatiri inotarirwa neiyo yakazara conductivity yebhatiri, uye kupikisa kwepolarization kwebhatiri kunotsanangurwa neiyo yakasimba phase diffusion coefficient ye lithium ion mu electrode inoshanda zvinhu. Kazhinji, kupikisa kwemukati kwemabhatiri e-lithium hakuparadzanisiki kubva pakugadzirwa kwemaitiro, zvinhu pachayo, zvakatipoteredza nezvimwe zvinhu, izvo zvichaongororwa nekududzirwa pasi apa.

Kutanga, kugadzirwa kwemaitiro

(1) Iyo yakanaka uye yakaipa electrode formulations ine yakaderera yemukati ye conductive agent, zvichikonzera hombe yemagetsi transmission impedance pakati pezvinhu uye muunganidzi, ndiko kuti, yakakwirira yemagetsi impedance. Lithium mabhatiri anopisa nekukurumidza. Zvisinei, izvi zvinogadziriswa nekugadzirwa kwebhatiri, semuenzaniso, bhatiri resimba kuti rifungisise chiyero chekuita, inoda chikamu chepamusoro che conductive agent, chakakodzera chiyero chikuru chekubhadhara uye kubuda. Capacity bhatiri yati wedzerei simba, yakanaka uye yakaipa zvinhu chikamu chichava chakakwira zvishoma. Sarudzo idzi dzinoitwa pakutanga kwekugadzirwa kwebhatiri uye hazvigone kuchinjika nyore.

(2) kune yakawandisa binder mune yakanaka uye yakaipa electrode formula. Iyo binder kazhinji i polymer material (PVDF, SBR, CMC, nezvimwewo) ine simba rekuvharisa. Kunyange zvazvo chikamu chepamusoro chebhainda muchiyero chepakutanga chinobatsira kuvandudza simba rekubvisa remapango, hazvina kunaka kune kupikisa kwemukati. Mukugadzirwa kwebhatiri kurongedza hukama pakati pebhainda uye bhainda dosage, iyo inozotarisa pakupararira kwebhainda, kureva, slurry kugadzirira maitiro, nesezvinogoneka kuve nechokwadi kupararira kwebhainda.

(3) Izvo zvinongedzo hazvina kuparadzirwa zvakaenzana, iyo conductive mumiriri haina kuparadzirwa zvizere, uye yakanaka conductive network chimiro haina kuumbwa. Sezvinoratidzwa muFigure 2, A inyaya yekusapararira zvakanaka kwe conductive agent, uye B inyaya yekupararira kwakanaka. Kana huwandu hwe conductive agent hwakafanana, shanduko yekukurudzira inozokanganisa kupararira kwe conductive agent uye kupikisa kwemukati kwebhatiri.

Mufananidzo 2. Kupararira kusina kunaka kwe conductive agent (A) Uniform dispersion ye conductive agent (B)

(4) Iyo binder haina kunyungudika zvachose, uye mamwe ma micelle particles aripo, zvichikonzera kukwirira kwemukati kwebhatiri. Hazvina mhosva kusanganiswa kwakaoma, kusanganiswa kwehafu-yakaoma kana kunyorova kusanganiswa, zvinotarisirwa kuti binder powder inonyungudika zvachose. Hatigoni kutevera kushanda zvakanaka zvakanyanya uye kufuratira chinangwa chinodiwa icho binder inoda imwe nguva kuti iparadzwe zvizere.

(5) Iyo electrode compaction density ichakanganisa kupikisa kwemukati kwebhatiri. Iyo compact density yeplate ye electrode idiki, uye porosity pakati pezvimedu mukati me electrode plate yakakwirira, iyo isingakodzeri kutapurirana kwema electrons, uye kupikisa kwemukati kwebhatiri kwakakwira. Kana pepa re electrode rakanyatsobatanidzwa zvakanyanya, electrode poda particles inogona kudarika, uye electron transmission nzira inova yakareba mushure mekupwanya, iyo isingakodzeri kubhadharisa uye kubuda kushanda kwebhatiri. Zvakakosha kusarudza iyo yakakodzera compaction density.

(6) Welding yakaipa pakati peyakanaka uye isina kunaka electrode lug uye fluid muunganidzi, virtual welding, yakakwira bhatiri kuramba. Yakakodzera welding parameters inofanira kusarudzwa panguva yewelding, uye welding parameters senge welding simba, amplitude uye nguva inofanira kuvandudzwa kuburikidza neDOE, uye hutano hwekushongedza hunofanira kutongwa nekugadzirisa simba uye chitarisiko.

(7) kupenengura kwakashata kana kusamira zvakanaka, mukaha uripo pakati pe diaphragm, platifomu yakanaka nendiro isina kunaka yakakura, uye ion impedance yakakura.

(8) Battery electrolyte haina kunyatsopinzwa mune yakanaka uye yakaipa electrode uye diaphragm, uye electrolyte dhizaini mvumo haina kukwana, izvo zvinozotungamira kune yakakura ionic impedance yebhatiri.

(9) Nzira yekugadzira yakashata, iyo graphite anode pamusoro SEI haina kugadzikana, inokanganisa kupikisa kwemukati kwebheteri.

(10) Zvimwe, senge kusarongeka kwakashata, kusakwenenzverwa kwenzeve dzedanda, kudonha kwebhatiri uye kunyorova kwakanyanya, zvine simba guru pakupikiswa kwemukati kwe lithium mabhatiri.

Chechipiri, zvinhu

(1) Kupokana kweanode uye anode zvinhu zvakakura.

(2) Pesvedzero yediaphragm zvinhu. Senge diaphragm ukobvu, saizi yeporosity, saizi yepore uye zvichingodaro. Ukobvu hunoenderana nekupikiswa kwemukati, iyo yakaonda iyo yemukati kuramba idiki, kuitira kuti uwane yakakwira simba kubhadharisa uye kuburitsa. Sediki sezvinobvira pasi peimwe simba remuchina, kukora kwesimba rekupinza ndiko kuri nani. Saizi yepore uye saizi yepore ye diaphragm ine hukama neiyo impedance yekutakura ion. Kana iyo pore saizi iri diki zvakanyanya, inowedzera iyo ion impedance. Kana iyo pore saizi yakakura kwazvo, haingakwanise kutsaura zvachose iyo yakanaka yakanaka uye yakaipa poda, iyo inotungamira nyore kupfupi pfupi kana kubayiwa ne lithium dendrite.

(3) Kupesvedzera kwezvinhu zve electrolyte. Iyo ionic conductivity uye viscosity ye electrolyte yakabatana neiyo ionic impedance. Iyo yakakura iyo ionic kutamisa impedance, iyo yakakura kuramba kwemukati kwebhatiri, uye zvakanyanya kukomba polarization mukuchaja nekuburitsa.

(4) Pesvedzero yezvinhu zvakanaka zvePVDF. Chikamu chepamusoro chePVDF kana kuti yakakwira molecular uremu zvakare inotungamira kune yakakwira yemukati kuramba kwe lithium bhatiri.

(5) Pesvedzero yezvakanaka conductive zvinhu. Kusarudzwa kwemhando ye conductive agent ndiyo yakakoshawo, yakadai seSP, KS, conductive graphite, CNT, graphene, nezvimwewo, nekuda kwekasiyana morphology, conductivity performance ye lithium battery yakasiyana, zvakakosha zvikuru kusarudza. iyo conductive agent ine yakakwirira conductivity uye yakakodzera kushandiswa.

(6) pesvedzero yezvakanaka uye zvisina kunaka pole nzeve zvinhu. Ukobvu hwepango nzeve yakaonda, iyo conductivity yakashata, kuchena kwechinhu chinoshandiswa hakusi kukwirira, conductivity yakashata, uye kupikisa kwemukati kwebheteri kwakakwirira.

(7) iyo foil yemhangura ine oxidized uye yakasungwa zvakashata, uye iyo aluminiyumu foil zvinhu zvine urombo conductivity kana oxide pamusoro, izvo zvinozotungamira mukupikiswa kwemukati kwebhatiri.

Mufananidzo

Zvimwe zvinhu

(1) Internal resistance test instrument kutsauka. Icho chiridzwa chinofanira kuongororwa nguva dzose kudzivirira mhedzisiro yebvunzo isina kunaka inokonzerwa nechiridzwa chisina kunaka.

(2) Kusagadzikana kwebhatiri mukati mekudzivirira kunokonzerwa nekushanda kusina kunaka.

(3) Mhoteredzo yakashata yekugadzira, yakadai sekudzora guruva nehunyoro. Hupfu hweworkshop inodarika mwero, inotungamira mukuwedzera kwekupikiswa kwemukati kwebhatiri, kuzviburitsa kunowedzera. Kunyorova kweworkshop kwakakwira, kuchakanganisawo kuita lithium bhatiri.