Inopa 3.3V voltage kune yedunhu system kuburikidza ne lithium bhatiri, uye ine basa re USB yekuchaja uye overcharge kugadzirisa.

USB kuchaja inosarudza TP4056 chip circuit kuti ipedze. TP4056 is single-cell lithium-ion bhatiri yakagadzikana yazvino / yakagadzikana voltage linear charger. Iyo PMOSFET dhizaini inosarudzwa mukati uye yakasanganiswa ne-anti-reverse kuchaja wedunhu, saka hapana yekunze yekuzviparadzanisa diode inodiwa. Thermal mhinduro inogona kushingaira kugadzirisa kuchaja ikozvino kumanikidzira chip tembiricha pasi pekushanda kwesimba repamusoro kana mamiriro ekushisa ambient. Iyo yekuchaja voltage yakagadzikana pa4.2V, uye ikozvino yekuchaja inogona kuiswa kunze kuburikidza neinopikisa. Kana iyo yekuchaja yasvika pachikamu chimwe chete chegumi cheiyo yakatarwa mushure mekusvika kune yekupedzisira yekuchaja voltage, TP4056 inoshingairira kumisa kutenderera kwekuchaja.

Kana pasina magetsi ekuisa, TP4056 inoshingairira kupinda munzvimbo yakaderera yazvino, ichidzikisa bhatiri rekudonha ikozvino kusvika pasi pe2uA. TP4056 inogona zvakare kuiswa mukuvhara modhi kana paine magetsi, ichidzikisa kugovera ikozvino ku55uA. Tsanangudzo yepini yeTP4056 inoratidzwa mutafura inotevera.

Iyo USB yekuchaja yedunhu dhizaini yakaita seiyi:

Kuongorora kwedunhu: Header2 ndiyo yekubatanidza terminal, uye B+ neB_ zvakabatanidzwa zvakasiyana kune yakanaka uye yakaipa mapango e lithium bhatiri. Pin 4 nePin 8 yeTP4056 yakabatana ne USB magetsi emagetsi e5V, uye Pin 3 yakabatana neGND kuti ipedze magetsi uye kugonesa chip. Batanidza 1 pini TEMP kuGND, dzima bhatiri tembiricha yekutarisa basa, 2 pini PROG batanidza resistor R23 uye wozobatanidza kuGND, ikozvino yekuchaja inogona kufungidzirwa maererano neinotevera fomula.

Iyo 5-pini BAT inopa kuchaja ikozvino uye 4.2V yekuchaja voltage kubhatiri. Chiratidzo chinovhenekera D4 uye D5 chiri munzvimbo yekudhonza-kumusoro, zvichiratidza kuti kuchaja kwapera uye kuchaja kuri kuitika. Ichavhenekera kana iyo yekubatanidza chip pin yadzikira. Pin 6 STDBY inogara iri mune yakakwira-impedance state panguva yekuchaja bhatiri. Panguva ino, D4 yadzima. Kana kuchaja kwapera, inodhonzerwa pasi kusvika padanho rakaderera neiyo yemukati switch. Panguva ino, D4 yakabatidzwa, zvichiratidza kuti kuchaja kwapera. Kusiyana neizvi, muchirongwa chekuchaja bhatiri, wachi yeCHRG iri padanho rakaderera kana pini 7 iripo, uye D5 iripo panguva ino, zvichiratidza kuti iri kuchaja. Kana kuchaja kwapera, iri munzvimbo yakakwira impedance, uye D5 yakadzimwa panguva ino.

Iyo lithium bhatiri yakawandisa uye overdischarge kugadzirisa dunhu inosarudza DW01 chip uye inoshanda pamwe neMOS chubhu 8205A kupedzisa. DW01 iri lithium bhatiri rekuchengetedza redunhu chip ine yakakwirira-chaiyo voltage yekutarisa uye nguva yekunonoka maseketi. Tsanangudzo yepini yeDW01 chip inoratidzwa mutafura pazasi.

8205A yakajairika dhiraivha N-chiteshi inokwidziridzwa simba FET, yakakodzera kugadzirisa bhatiri kana yakaderera-voltage switching maseketi. Chimiro chemukati che chip chinoratidzwa mumufananidzo uri pasi apa.

Iyo lithium bhatiri yekuchaja uye kugadzirisa dunhu inoratidzwa mumufananidzo uri pazasi.

Kuongorora kwedunhu: Header3 is a toggle switch to control kana lithium bhatiri simba rinoshandiswa.

Kushanda kwakajairika kwerithium bhatiri: Kana lithium bhatiri iri pakati pe2.5V ne4.3V, ese mapini 1 uye 3 eDW01 akabuda akakwira mwero, uye voltage yepini 2 ndeye 0V. Zvinoenderana nedhiyagiramu ye8205A, pini 1 nepini 3 yeDW01 zvakabatanidzwa nepini 5 nepini 4 ye8205A. Zvinogona kuoneka kuti ese ari maviri MOS transistors ari mukufambisa. Panguva ino, danda rakashata reti lithium bhatiri rakabatana kune simba rekupa pasi P_ ye microcontroller circuit, uye lithium bhatiri yakajairika. powered by.

Overcharge kuchengetedza kutonga: Kana iyo lithium bhatiri ichichajwa kuburikidza neTP4056 dunhu, iyo lithium bhatiri simba rinowedzera sezvo nguva yekuchaja ichiwedzera. Kana simba rebhatiri reti lithium richikwira kusvika ku4.4V, DW01 inofunga kuti simba rebhatiri re lithium ratova mumamiriro ekuwedzera, uye pakarepo inoshandura pini 3 kuti ibudise 0V, uye 8205A chip G1 haina magetsi, zvichiita kuti MOS tube. kumira. Panguva ino, lithium bhatiri B_ haina kubatanidzwa kune redunhu simba rekupa P_ ye-single-chip microcomputer, ndiko kuti, dunhu rekuchaja reti lithium bhatiri rakavharwa, uye kubhadharisa kunomiswa. Kunyangwe iyo overcharge control switch chubhu yakadzimwa, kutungamira kweiyo diode yemukati kwakafanana neyekuyerera kwedunhu, saka kana mutoro wekuburitsa wakabatana pakati peP + neP_, unogona kuramba uchiburitswa. Kana iyo voltage ye lithium bhatiri yakaderera pane 4.3V, iyo DW01 inomisa iyo overcharge kuchengetedza mamiriro. Panguva ino, lithium bhatiri B_ yakabatana kune simba rekupa P_ ye microcontroller circuit, uye yakajairika kuchaja uye kubuda kunoitwa zvakare.

Kuwedzeresa-kuburitsa kuchengetedza kudzora: Kana iyo lithium bhatiri inoburitswa nemutoro wekunze, iyo voltage yelithium bhatiri inodonha zvishoma nezvishoma. DW01 inoona voltage yelithium bhatiri kuburikidza neR26 resistor. Apo magetsi anodonha kusvika ku2.3V, DW01 inofunga kuti lithium battery voltage yatova mu-over-discharge voltage condition, uye pakarepo inoshandura pini 1 kuti ibudise 0V, uye 8205A chip G2 haina magetsi zvichiita kuti MOS tube imire. Panguva ino, lithiamu bhatiri B_ haina kubatanidzwa kune redunhu simba rekupa P_ ye-single-chip microcomputer, ndiko kuti, kubuda kweiyo lithium bhatiri yakavharwa, uye kubuda kunomira. Kana yakabatana neiyo TP4056 yedunhu yekuchaja, mushure mekunge DW01 yaona voltage yekuchaja kuburikidza neB_, inodzora pini 1 kuburitsa yakakwira mwero. Panguva ino, lithium bhatiri B_ yakabatana kune simba rekupa P_ yeiyo microcontroller wedunhu, uye yakajairika kuchaja uye kuburitsa kunoitwa zvakare.