Kodi 18650 lithiamu-ion batire chitetezo board njira ndi chiyani?

2022/04/08

Wolemba: Iflowpower -Portable Power Station Supplier

Pankhani yomwe lithiamu ion batire yoteteza bolodi ndi yachibadwa, VDD ndi yapamwamba, VSS, VM ndi yochepa, DO, CO ndi yapamwamba, pamene VDD, VSS, VM yasinthidwa, DO kapena CO mapeto Level idzasintha. 1 30 miliyoni, kotero kukana kwake sikumakhudza magwiridwe antchito a dera. Kugwiritsa ntchito dera lachitetezo kuli m'chigawo chino.

μKalasi A, nthawi zambiri zosakwana 7μA. 2 Mphamvu yamagetsi ndi 4.1V), ndipo imatembenuzidwa kuti ipitirire nthawi zonse kuti ipereke ndalama mpaka panopa ikucheperachepera.

Panthawi yolipiritsa, ngati dera la charger latayika, mphamvu ya batri idzapitilirabe mphamvu ya batri ikadutsa 4.2V. Panthawi imeneyi, batire voteji adzapitiriza kuwuka, ndipo pamene voteji batire mlandu kuposa 4.

3V, batire ndi mankhwala Mbali zochita zidzachulukirachulukira, kubweretsa kuwonongeka kwa batri kapena zovuta zachitetezo. Mu batire yokhala ndi dera loteteza, pomwe IC yowongolera imayesedwa ku voteji ya batri ifika 4.28V (mtengo uwu umatsimikiziridwa ndi IC yowongolera, pini ya CO idzasintha ndi voteji yayikulu mpaka zero voltage, kotero kuti V2 imazimitsidwa, potero imadula chozungulira, kuti chojambuliracho chizitha kulipiritsidwa ku batri, ndikusewera chitetezo cha charger.

Panthawiyi, chifukwa cha kukhalapo kwa V2 yokha, batire imatha kutulutsa katundu wakunja ndi diode. Pamene IC yolamulira imayesedwa ku magetsi a batri, pali nthawi yochedwa, ndipo kutalika kwa nthawi yochedwa kumatsimikiziridwa ndi C3, kawirikawiri imayikidwa ku 1 sekondi, ndipo imayambitsa chenjezo chifukwa cha kusokoneza. woweruza.

3, batire yotetezedwa mopitilira muyeso ikuchepa pang'onopang'ono ndikutulutsa, pomwe mphamvu ya batire imatsikira ku 2.5V, ngati batire imatulutsidwa mosalekeza Idzawononga batire kwamuyaya. Pakutulutsa kwa batri, pomwe IC yowongolera imayesedwa kumagetsi a batri pansi pa 2.

3V (mtengo uwu umatsimikiziridwa ndi IC yolamulira, pini ya DO idzasintha kuchokera pamagetsi apamwamba kufika pa zero voteji, kotero kuti V1 imadutsa ndi kalozera Tembenuzani kuti muzimitse, potero kudula dera lotulutsa, kuchititsa kuti batire itulutse katunduyo. , ndikusewera chitetezo chotulutsa kwambiri.Panthawiyi, chifukwa cha kukhalapo kwa v1 vs. VD1 yokha, chojambuliracho chimatha kulipiritsidwa ndi diode.

Popeza mphamvu ya batri silingatsitsidwe m'malo otetezedwa mopitilira muyeso, kugwiritsa ntchito komweko kwa dera lachitetezo kumakhala kochepa, ndipo IC yowongolera idzalowa m'malo otsika mphamvu, ndipo gawo lonse lachitetezo limawononga zosakwana 0.1.μA.

Pamene IC yolamulira imayesedwa ku magetsi a batri ndi osachepera 2.3V, pali nthawi yochedwa, ndipo kutalika kwa nthawi yochedwa kumatsimikiziridwa ndi C3, kawirikawiri imayikidwa ku 100 milliseconds, ndipo chenjezo limayambitsidwa ndi kusokoneza. Chiweruzo .

4, batire yachitetezo chafupipafupi Pamene dera lamagetsi lili lalikulu pakutulutsa katundu, IC yowongolera imatsimikiza kuti gawo lalifupi la katundu limatsimikiziridwa ngati U0.9V idapangidwa kuti ipange U0.9V (mtengo uwu umatsimikiziridwa ndi IC yowongolera .

) Pini ya DO idzasintha mofulumira kuchokera kumagetsi apamwamba kupita ku voteji ya zero, kotero kuti V1 idzazimitsidwa kuti izimitse, potero imadula dera lotulutsa, ndikugwira ntchito ku chitetezo chachifupi. Chitetezo chozungulira chachifupi ndichofupika kwambiri, nthawi zambiri chimakhala chochepera ma microseconds 7. Mfundo yake yogwirira ntchito ndi yofanana ndi chitetezo cha overcurrent, koma chiweruzo ndi chosiyana, ndipo nthawi yochedwa chitetezo ndi yosiyana.

Kuphatikiza pa IC yolamulira, pali gawo la nicker m'derali, lomwe ndi MOSFET, lomwe limasewera kusinthana kozungulira. Popeza cholumikizidwa pakati pa batire ndi katundu wakunja, impedance yake conduction imakhala ndi ntchito ya batri. Zotsatira, pamene MOSFET yosankhidwa ili bwino, kusokoneza kwake kumakhala kochepa, kukana kwa mkati kwa paketi ya batri kumakhala kochepa, mphamvu yolemetsa imakhala yamphamvu, ndi mphamvu yamagetsi yomwe imagwiritsidwa ntchito ikatulutsidwa.

5, chitetezo chochulukirapo chifukwa cha mawonekedwe amafuta a lithiamu-ion mabatire, phukusi la batri limafotokoza kuti kutulutsa kwawo kumapitilira 2C (C = mphamvu ya batri / ola), zomwe zingayambitse kuwonongeka kwa batire pamene batire ipitilira 2C kutulutsa komweko. nkhani. Panthawi yotulutsa katunduyo, kutulutsa komweko kumalumikizidwa motsatizana, chifukwa cha MOSFET's conduction impedance, voliyumu imapezeka pamapeto onse awiri, mtengo wamagetsi u = I * RDS * 2, RDS ndi imodzi MOSFET imayatsidwa. , V-phazi pa control IC imayesedwa pamtengo wamagetsi. Pamene ma IC osiyanasiyana ali ndi makhalidwe osiyanasiyana), pini ya DO idzasintha ndi mphamvu yamagetsi mpaka zero voteji, kotero kuti V1 azimitsidwa kuti azimitse, potero kudula dera lotulutsa, kotero kuti panopa ndi zero mu kuzungulira, ndi imathandizira kugwiritsa ntchito chitetezo chambiri.

Pakuyesa kwa IC, pali nthawi yochedwa pakati pa kuyesa kwa IC, ndipo pali nthawi yochedwa. Kutalika kwa nthawi yochedwa kumatsimikiziridwa ndi C3, kawirikawiri 13 milliseconds, ndipo cholakwikacho chimayamba chifukwa chosalungama. Muzomwe tafotokozazi pamwambapa, kuyesa kwake kopitilira muyeso sikungokhala pa kuwongolera kwa IC, komanso kumadalira pa-impedance ya MOSFET.

MOSFET ikayatsidwa, IC yolamulira yofanana, chitetezo chake chambiri Chochepa mtengo. .

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