3 X 18650 Roj Teeb Peev Tester: 6 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:28

Muaj ntau cov lus qhia yuav ua li cas tsim arduino raws cov peev txheej ntsuas hauv internet. Qhov ntawd yog, tias nws yog txheej txheem ntev los ntsuam xyuas lub peev xwm roj teeb. Cia peb hais tias koj xav tso 2000mAh roj teeb nrog ~ 0.5A tam sim no. Nws yuav siv sijhawm tas mus li (qhov tseeb: 4 teev). Kuv tau sim nrhiav txoj hauv kev nrawm dua los qhia ntau lub peev xwm ntawm tes. Kev tso tawm ntau ntxiv tam sim no tsis yog qhov muaj kev nyab xeeb, tshwj xeeb tshaj yog thaum koj lub nra hnyav tiv taus. Kev tiv thaiv qis dua = thauj khoom ntau dua = lub zog ntau dua (cua sov) kom tawg.

Yeej peb tso tawm cov cell kom ua tiav ob lub hom phiaj sib txawv:

• peev xwm qhia tau
• tso tawm mus rau ~ 40% ntawm tag nrho lub peev xwm, los muab kev nyab xeeb nruj rau cov cell siv tsis tau ntev dua

Txhawm rau ua kom tau raws li tau hais los saum no, Kuv txiav txim siab los tsim ntau lub chaw tso tawm cell. Muaj ob hom thiab cov ntawv qhia yooj yim, tuaj yeem ua haujlwm los ntawm ib lub pob. Cov yam ntxwv ntxiv yog sab hauv tsis kam (Rw) suav.

Kuv tsis yog tus kws tshaj lij hauv qhov teeb meem no, yog li koj ua txhua yam ntawm koj tus kheej RISK. Cov lus pom thiab cov lus pom zoo tau txais tos.

Kev tshoov siab thiab lub hauv paus los ntawm ob txoj haujlwm uas kuv tau pom:

www.instructables.com/id/DIY-Arduino-Batte…

arduinowpraktyce.blogspot.com/2018/02/test…

Kauj ruam 1: BOM

Peb yuav xav tau:

• 1 x Arduino Nano
• 3 x IRLZ44N Mosfet
• 1x3 roj teeb tuav
• 3x Cement resistor - piv txwv li 10R 10W - nyeem txog qhov no hauv ntu tom ntej
• 3x5mm liab LED
• Laub khawm
• LCD - hauv qhov haujlwm no kuv siv 16x2 i2c LCD
• 1 x 10 k resistor
• 9x4k7 ua
• 3x1k tiv
• 1 x 100R resistor
• 1x Ntsia Hlau davhlau ya nyob twg rau kev txuas fais fab txuas (7-12V) - yeem yog tias koj xav tau lub zog siv lub cuab yeej nrog arduino mini USB
• 1x 4 tus pin poj niam header, 2.54
• 1x 15 Goldpin poj niam lub taub hau, 2.54mm (xaiv tau - yog tias koj xav mus modular)
• 1x Buzzer (yeem)

Kauj Ruam 2: Schematic thiab Txoj Cai Kev Ua Haujlwm

Lub hlwb ntawm kuv qhov project yog arduino nano. Arduino tswj 3 mosfet, uas tau siv los qhib / kaw 3 lub roj teeb hluav taws xob nrog cov khoom sib xws. Peb tab tom ntsuas (siv 3 qhov sib faib hluav taws xob) qhov hluav taws xob ntawm cov hluav taws xob los txiav txim siab qhov ntws tam sim no los ntawm lub zog tiv thaiv - siv txoj cai Ohm.

Kuv = V / R

Qhov poob qis hla lub zog tiv thaiv kab mob yuav luag sib npaug ntawm qhov ntsuas hluav taws xob ntawm cov roj teeb txuas (piv txwv tias cov khoom sib txuas zoo thiab cov xov hlau zoo), yog li tsis tas yuav ntsuas qhov ntsuas hluav taws xob ua ntej thiab tom qab cov resistors. Cov faib hluav taws xob tau siv los tiv thaiv cov xov tooj ntawm tes los ntawm kev txhawb nqa peb lub cuab yeej.

Paub txog qhov hluav taws xob thiab qhov tam sim no dhau lub sijhawm tso tawm, peb muaj peev xwm xam lub peev xwm ntawm tes.

Kauj Ruam 3: Xaiv Lub Hwjchim Resistors

Tus nqi tiv thaiv yog nyob ntawm kev tso tawm tam sim no uas peb xav kom ua tiav. Piv txwv tias max 0.5A tam sim no, tus nqi tiv thaiv yuav tsum yog:

R = V (max cell voltage) / I (tawm tam sim no) = 4.2V / 0.5 = 8.4 Ohm

Siv 10R resistor, koj yuav tau txais:

Kuv = V / R = 4.2V / 10 ohm = 0.42A

Tus hlub resistor tus nqi, siab dua tam sim no.

TSEEM CEEB !! Muaj ntau lub zog yuav tsum tau yaj tawm, yog li tus tiv thaiv yuav kub dua. Peb tuaj yeem txiav txim siab yam tsawg resistor zog raws li:

Min zog = I^2 * R = 0.42^2 * 10 = 1.76W

Kuv siv 3R3 17W resistors, txawm li cas los xij kuv cov lus qhia yog siv 10R (10W lossis li ntawd) - nws yuav tswj lub zog tsis muaj dej thiab nws qhov kub yuav nyob nyab xeeb.

Kauj ruam 4: Arduino Code

Koj yuav tsum tau kho cov ntsuas hauv qab no raws li koj qhov ntsuas ntsuas:

R1, R2, R3 - lub zog tiv thaiv qhov tseem ceeb [ohm]

RB1, RB2, RB3 - B1 -B3 Circuit Court tsis kam. R1+0.1 nyob ze txaus [Ohm]

X1, X2, X3 - qhov sib faib hluav taws xob sib piv. Yog tias koj tsis xav ntsuas nws tiag tiag, koj tuaj yeem nkag mus tsuas yog 2

luv - ntsuas Interwal (ms) - default 5000 ms

voltRef - Qhov ntsuas hluav taws xob ntsuas ntawm arduino tus pin 5V thiab GND - default 5.03

Kauj Ruam 5: PCB

Npaj rau kev xaj / kos duab:)

Kauj ruam 6: Ntawv qhia zaub mov

Xovxwm luv (nrog ~ 1s ncua nruab nrab ntawm nias tom ntej) - hloov tus nqi

Nias ntev - paub meej

Thawj qib ntawm cov ntawv qhia zaub mov: xaiv hom (ntsuas lub peev xwm lossis tso tawm yooj yim rau qhov ntsuas hluav taws xob)

Qib thib ob ntawm cov ntawv qhia zaub mov: xaiv qhov tsawg kawg nkaus voltage, qhov kawg ntawm kev ntsuas tshwm sim.

Thaum kev ntsuas ntawm ib qho tshwj xeeb ntawm tes tau ua tiav, lub vijtsam kawg tau tshwm, uas koj tuaj yeem pom lub roj teeb muaj peev xwm thiab kev tiv thaiv sab hauv (Rw).