Lingaliro la Lithium charge and discharge & kapangidwe ka njira yowerengera magetsi(2)

Lingaliro la Lithium charge and discharge & mapangidwe a njira yowerengera magetsi

2. Chiyambi cha mita ya batri

2.1 Ntchito yoyambitsa mita yamagetsi

Kuwongolera batri kumatha kuonedwa ngati gawo la kayendetsedwe ka mphamvu.Pakuwongolera batri, mita yamagetsi ndiyomwe imayang'anira kuchuluka kwa batri.Ntchito yake yayikulu ndikuwunika mphamvu yamagetsi, kulipiritsa / kutulutsa kutentha kwa batri, ndikuyerekeza momwe batire ilili (SOC) ndi kuchuluka kwathunthu (FCC) ya batri.Pali njira ziwiri zoyezera kuchuluka kwa batire: njira yotseguka yamagetsi (OCV) ndi njira ya coulometric.Njira ina ndi ma dynamic voltage algorithm yopangidwa ndi RICHTEK.

2.2 Njira yotseguka yamagetsi

Ndikosavuta kuzindikira mita yamagetsi pogwiritsa ntchito njira yamagetsi yotseguka, yomwe ingapezeke poyang'ana momwe magetsi amayendera.Mphamvu yamagetsi yotseguka imaganiziridwa kuti ndi mphamvu yamagetsi ya batri pamene batire ikupumula kwa mphindi zopitilira 30.

Mapiritsi a batri amasiyana ndi katundu, kutentha ndi ukalamba wa batri.Chifukwa chake, voltmeter yotseguka yokhazikika siyingathe kuyimira bwino ndalama;Mkhalidwe wa ndalama sungathe kuyerekezedwa poyang'ana pa tebulo lokha.Mwa kuyankhula kwina, ngati chikhalidwe cha malipiro chikuyerekezedwa ndi kuyang'ana pa tebulo, cholakwikacho chidzakhala chachikulu.

Chithunzi chomwe chili pansipa chikuwonetsa kuti mawonekedwe (SOC) amagetsi a batri omwewo ndi osiyana kwambiri ndi njira yotseguka yamagetsi pansi pa kuyitanitsa ndi kutulutsa.

Chithunzi 5. Magetsi a batri pansi pazigawo zolipiritsa ndi kutulutsa

Zitha kuwoneka kuchokera pachithunzi chomwe chili pansipa kuti chikhalidwe cha malipiro chimasiyana kwambiri pansi pa katundu wosiyana panthawi yotulutsa.Chifukwa chake, njira yamagetsi yotseguka ndi yoyenera pamakina omwe amafunikira kulondola kwanthawi yayitali, monga magalimoto ogwiritsira ntchito mabatire a lead-acid kapena magetsi osasokoneza.

Chithunzi 6. Mphamvu ya batri pansi pa katundu wosiyana panthawi yotulutsa

2.3 Njira ya Coulometric

Mfundo yogwiritsira ntchito coulometry ndiyo kulumikiza chotsutsa chodziwikiratu pa njira yolipiritsa / yotulutsa batri.ADC imayesa mphamvu yamagetsi pa kukana kuzindikira ndikuisintha kukhala mtengo wamakono wa batri yomwe imayimbidwa kapena kutulutsidwa.The real-time counter (RTC) ikhoza kuphatikiza mtengo wapano ndi nthawi kuti mudziwe kuchuluka kwa ma coulombs omwe akuyenda.

Chithunzi 7. Njira yoyambira yogwiritsira ntchito njira yoyezera coulomb

Njira ya Coulometric imatha kuwerengera molondola kuchuluka kwa nthawi yeniyeni pakulipiritsa kapena kutulutsa.Ndi kauntala ya coulomb ya charger ndi discharge coulomb counter, imatha kuwerengera mphamvu yotsalira yamagetsi (RM) ndi kuchuluka kwacharge (FCC).Panthawi imodzimodziyo, mphamvu yotsalira yotsalira (RM) ndi mphamvu zonse (FCC) zingagwiritsidwenso ntchito kuwerengera momwe ndalama zimakhalira (SOC = RM / FCC).Kuphatikiza apo, imathanso kuyerekeza nthawi yotsalayo, monga kutha kwa mphamvu (TTE) ndi kudzaza mphamvu (TTF).

Chithunzi 8. Njira yowerengera ya njira ya coulomb

Pali zinthu ziwiri zazikulu zomwe zimayambitsa kupatuka kwa coulomb metrology.Choyamba ndikudziunjikira zolakwika za offset pakuzindikira komwe kulipo komanso muyeso wa ADC.Ngakhale kuti cholakwika choyezera ndi chaching'ono ndi luso lamakono, ngati palibe njira yabwino yothetsera vutoli, cholakwikacho chidzawonjezeka ndi nthawi.Chithunzi chomwe chili pansipa chikuwonetsa kuti pakugwiritsa ntchito, ngati palibe kuwongolera munthawi yake, cholakwika chosonkhanitsidwa chilibe malire.

Chithunzi 9. Kulakwitsa kochulukira kwa njira ya coulomb

Pofuna kuthetsa cholakwika chosonkhanitsidwa, pali nthawi zitatu zomwe zingatheke pakugwira ntchito kwa batri: mapeto a malipiro (EOC), mapeto a kutulutsa (EOD) ndi kupuma (Relax).Batire ili ndi mphamvu zonse ndipo malo opangira (SOC) ayenera kukhala 100% pamene mapeto otsatsira afika.Kutha kwa kutulutsa kumatanthawuza kuti batri yatulutsidwa kwathunthu ndipo malo operekera (SOC) ayenera kukhala 0%;Kungakhale mtheradi voteji mtengo kapena kusintha ndi katundu.Ikafika pamalo ena onse, batire sililipiritsidwa kapena kutulutsidwa, ndipo limakhalabe m'derali kwa nthawi yayitali.Ngati wogwiritsa ntchito akufuna kugwiritsa ntchito mpumulo wa batri kuti akonze zolakwika za njira ya coulometric, ayenera kugwiritsa ntchito voltmeter yotseguka panthawiyi.Chithunzi chomwe chili pansipa chikuwonetsa kuti zolakwika zomwe zili pamwambapa zitha kuwongoleredwa.

Chithunzi 10. Zoyenera kuthetsa kulakwitsa kowonjezereka kwa njira ya coulometric

Chinthu chachiwiri chachikulu chomwe chimayambitsa kupotoza kolondola kwa njira ya coulomb metering ndikulakwitsa kwamphamvu (FCC), komwe ndiko kusiyana pakati pa kapangidwe ka batri ndi mphamvu yeniyeni ya batire.Full charge capacity (FCC) idzakhudzidwa ndi kutentha, ukalamba, katundu ndi zinthu zina.Chifukwa chake, njira yophunziriranso komanso yolipirira mphamvu zolipiridwa mokwanira ndizofunikira kwambiri panjira ya coulometric.Chithunzi chomwe chili pansipa chikuwonetsa momwe zolakwika za SOC zimachulukira pamene kuchuluka kwa ndalama kumachulukitsidwa komanso kuchepetsedwa.

Chithunzi 11. Mchitidwe wolakwika pamene mphamvu yokwanira yamalipiro ndi yowonjezereka komanso yocheperapo