Inika i-3.3V i-voltage kwinkqubo yesiphaluka ngebhetri ye-lithium, kwaye inomsebenzi wokutshaja kwe-USB kunye nokugcinwa kwe-overcharge.

Ukutshaja kwe-USB kukhetha isekethe yetshiphu yeTP4056 ukuba igqitywe. I-TP4056 yibhetri ye-lithium-ion yeseli enye ezinzileyo yangoku/itshaja ezinzileyo yombane ehambelana netshaja. I-architecture ye-PMOSFET ikhethwe ngaphakathi kwaye idibaniswe ne-anti-reverse yokutshaja isiphaluka, ngoko ke akukho diode yokuhlukanisa yangaphandle efunekayo. Ingxelo ye-Thermal inokulungelelanisa ngokusebenzayo ukutshaja ukunyanzela ubushushu be-chip phantsi kokusebenza kwamandla aphezulu okanye iimeko zobushushu obuphezulu. I-voltage yokutshaja izinzile kwi-4.2V, kwaye umbane wokutshaja unokusetwa ngaphandle ngaphandle kwe-resistor. Xa umbane wokutshaja ufikelela kwisishumi sexabiso elimiselweyo emva kokufikelela kumbane wokugqibela wokutshaja, i-TP4056 iya kuphelisa ngokusebenzayo umjikelezo wokutshaja.

Xa kungabikho i-voltage yegalelo, i-TP4056 ingena ngenkuthalo kwimeko ephantsi yangoku, inciphisa ukuvuza kwebhetri yangoku ukuya ngaphantsi kwe-2uA. I-TP4056 inokubekwa kwakhona kwimodi yokuvala xa kukho umbane, ukunciphisa unikezelo lwangoku kwi-55uA. Inkcazo yephini ye-TP4056 iboniswe kolu luhlu lulandelayo.

Umzobo wesekethe yokutshaja i-USB umi ngolu hlobo lulandelayo:

Uhlalutyo lweSekethe: I-Header2 yi-terminal yokudibanisa, kunye ne-B + kunye ne-B_ zidibene ngokwahlukileyo kwiipali ezilungileyo kunye nezibi zebhetri ye-lithium. I-Pin 4 kunye ne-Pin 8 ye-TP4056 idityaniswe kumbane wombane we-USB we-5V, kunye ne-Pin 3 iqhagamshelwe kwi-GND ukugqiba unikezelo lwamandla kunye nokusebenza kwe-chip. Xhuma i-1 ipini ye-TEMP kwi-GND, cima umsebenzi wokubeka iliso kwibhetri, i-2 pin PROG idibanise i-resistor R23 uze udibanise kwi-GND, umbane wokutshaja unokuqikelelwa ngokwefomula elandelayo.

I-5-pin BAT inikezela ngokutshaja ngoku kunye ne-4.2V yombane wokutshaja kwibhetri. Izibane zesalathiso ze-D4 kunye ne-D5 zikwimeko yokutsala, ebonisa ukuba ukutshaja kuphelile kwaye ukutshaja kuyaqhubeka. Iya kukhanya xa i-pin ye-chip yoqhagamshelo iphantsi. I-Pin 6 STDBY ihlala ikwimo ephezulu yokuthintela ngexesha lokutshaja ibhetri. Ngalo mzuzu, i-D4 icimile. Xa ukutshaja kugqityiwe, kutsalwa phantsi ukuya kwinqanaba eliphantsi ngokutshintsha kwangaphakathi. Okwangoku, i-D4 ivuliwe, ebonisa ukuba ukutshaja kugqityiwe. Ngokuchasene noko, kwiprojekthi yokutshaja ibhetri, iwotshi ye-CHRG ikwinqanaba eliphantsi xa i-pin 7 ivuliwe, kwaye i-D5 ivuliwe ngalo mzuzu, ebonisa ukuba iyatshaja. Xa ukutshaja kugqityiwe, kukwimeko ephezulu yokuphazamiseka, kwaye i-D5 icimile ngalo mzuzu.

I-lithium ibhetri ye-lithium i-overcharge kunye ne-overdischarge yokugcinwa kwesekethe ikhetha i-chip ye-DW01 kwaye isebenzisana ne-MOS tube 8205A ukugqiba. I-DW01 yi-lithium yokugcinwa kwebhetri yesekethe yesekethe ye-chip kunye ne-high-precision voltage monitoring kunye neesekethe zokulibaziseka kwexesha. Inkcazo yephini ye-chip ye-DW01 iboniswe kwitheyibhile engezantsi.

I-8205A ngumbhobho oqhelekileyo we-N-chaneli ophuculweyo wamandla we-FET, olungele ukugcinwa kwebhetri okanye iisekethe zokutshintsha i-voltage ephantsi. Isakhiwo sangaphakathi se-chip siboniswe kumzobo ongezantsi.

Ukutshaja kwebhetri ye-lithium kunye nokugcinwa kwesekethe kuboniswe kumzobo ongezantsi.

Uhlalutyo lwesekethe: I-Header3 lutshintsho lokuguqula ukulawula ukuba ibhetri ye-lithium iyasetyenziswa.

Ukusebenza okuqhelekileyo kwebhetri ye-lithium: Xa ibhetri ye-lithium iphakathi kwe-2.5V kunye ne-4.3V, zombini izikhonkwane ze-1 kunye ne-3 ze-DW01 eziphuma kwinqanaba eliphezulu, kunye ne-voltage ye-pin 2 yi-0V. Ngokomzobo weskimu we-8205A, i-pin 1 kunye ne-pin 3 ye-DW01 ziqhagamshelwe ngokwahlukileyo kwi-pin 5 kunye ne-4 ye-8205A. Ingabonwa ukuba zombini iitransistors zeMOS ziyaqhuba. Kulo mzuzu, i-pole negative yebhetri ye-lithium ixhunywe kumhlaba wokunikezelwa kwamandla P_ wesiphaluka se-microcontroller, kwaye ibhetri ye-lithium iyinto eqhelekileyo. Ixhaswa ngu.

Ukulawulwa kokugcinwa kwe-Overcharge: Xa ibhetri ye-lithium ihlawuliswa ngesekethe ye-TP4056, amandla ebhetri ye-lithium aya kwanda njengoko ixesha lokutshaja landa. Xa i-voltage yebhetri ye-lithium iphakama ukuya kwi-4.4V, i-DW01 icinga ukuba i-voltage yebhetri ye-lithium sele ikwimeko yokugqithiswa, kwaye ngokukhawuleza ilawula i-pin 3 ukuya kwimveliso ye-0V, kwaye i-8205A chip G1 ayinayo i-voltage, ibangela ityhubhu ye-MOS. ukumisa. Kulo mzuzu, ibhetri ye-lithium B_ ayixhunyiwe kwi-circuit power supply P_ ye-microcomputer ye-single-chip, oko kukuthi, isiphaluka sokushaja ibhetri ye-lithium ivaliwe, kwaye ukutshaja kumisiwe. Nangona i-tube yokutshintsha i-overcharge control ivaliwe, isalathiso se-diode yayo yangaphakathi ifana neyesekethe yokukhupha, ngoko ke xa umthwalo wokukhupha udibene phakathi kwe-P + kunye ne-P_, usenokukhutshwa. Xa i-voltage yebhethri ye-lithium iphantsi kwe-4.3V, i-DW01 imisa imeko yokugcinwa kwe-overcharge. Kulo mzuzu, ibhetri ye-lithium B_ ixhunyiwe kumandla ombane P_ wesiphaluka se-microcontroller, kwaye intlawulo eqhelekileyo kunye nokukhutshwa kuyenziwa kwakhona.

Ukulawulwa kokugcinwa kokukhutshwa ngokugqithiseleyo: Xa ibhetri ye-lithium ikhutshwe ngomthwalo wangaphandle, i-voltage yebhetri ye-lithium iya kuhla ngokukhawuleza. I-DW01 ibona umbane webhetri ye-lithium nge-R26 resistor. Xa i-voltage yehla ukuya kwi-2.3V, i-DW01 icinga ukuba i-lithium ibhetri ye-lithium sele ikwimeko yombane ogqithisiweyo, kwaye ngokukhawuleza ilawula i-pin 1 kwimveliso ye-0V, kunye ne-8205A chip G2 ayinayo i-voltage ebangela ukuba ityhubhu ye-MOS ime. Kulo mzuzu, ibhetri ye-lithium B_ ayixhunyiwe kwi-circuit power supply P_ ye-microcomputer ye-single-chip, oko kukuthi, isiphaluka sokukhutshwa kwebhetri ye-lithium ivaliwe, kwaye ukukhutshwa kuvaliwe. Xa uqhagamshelwe kwisekethe ye-TP4056 yokutshaja, emva kokuba i-DW01 ibone i-voltage yokutshaja nge-B_, ilawula i-pin 1 ukukhupha izinga eliphezulu. Kulo mzuzu, ibhetri ye-lithium B_ ixhunyiwe kumandla ombane P_ wesiphaluka se-microcontroller, kwaye intlawulo eqhelekileyo kunye nokukhutshwa kuyenziwa kwakhona.