Nkau mi gaw, ma langai hpe chyu jaw ai hte garan kau ai lam hpe ma hkum lu ai hte shingdaw yu nna, grai n-gun ja ai:
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2. Kanu kawa gaw ma hpe aten shagu n jaw ai rai yang, hkaulan mam gaw grau grau shinggyin la na re, battery overcharge hte bung ai;
3. Ma gaw lawan ladan hka ja ai rai yang, battery hpe grai makawp maga ai hte bung ai, hkaulan mam hpe hka ja na matu loi ai;
Lithium battery ni a matu, hkaulan mam hpe hpaji masa hku n lu jaw sha nna, n lu sha ai rai yang, battery a prat hpe shayawm ya ai hta n-ga, kalang lang battery hpe makawp maga ai hte bawm kapaw ai zawn re ai hkrit tsang hpa masa ni hpe mung byin shangun chye ai. Dai majaw ndai masa hpe gara hku hkang na?
Kalang lang, lithium battery kata hta PCB board hpe ap nawng da ai makawp maga lam nga ai, dai hpe battery unit hte rau shinggyin tawn da ai. Shi a makawp maga ai npu hta, lithium battery a pru wa ai voltage hpe shim lum ai voltage range kata kaw hkang lu ai, ngu ai gaw, battery a charge hte n-gun hpe jahkring kau ai voltage hte htum mat ai voltage hpe jahkring kau lu ai.
Battery a bungli galaw ai voltage gaw shim lum ai shara hta jan ai rai yang, n mai gram lajang lu ai hkra machyi lam ni gaw battery kata kaw byin wa chye ai, dai gaw battery hpe hkra machyi shangun ai, dai gaw battery a kata na ninghkap ai lam law wa ai hte n-gun yawm wa ai hta dan dawng nga ai.
▌Lithium battery makawp maga ai board
Lithium battery makawp maga ai board gaw, lawu na sumla hta madun da ai zawn, IC, MOS tube, resistor capacitor, fuse FUSE, etc. ni hpe hpaw shalawm ai.
Shinggan port hta, TH gaw nbung katsi ai hpe sawk sagawn ai, 10K NTC gaw battery a negative electrode hte matut da ai; ID gaw- shara hpe mu lu ai hta battery rai nna, madung hku nna 47K/10K resistor hpe resistor a n kaja ai electrode hte matut da ai, nkau mi gaw 0R resistor ni rai nga ai; TH hte ID ni gaw lata la mai ai, lithium battery yawng n lu ai.
▌shingran Madim Lam
Battery gaw charge galaw nga ai shaloi, ya aten gaw battery pack a positive electrode de lwi shang wa nna, FUSE hku lai wa ai hpang, negative electrode kaw na lwi pru wa ai. Lawu kaw na MOS tube lahkawng gaw on state kaw nga ai. Lawu na sumla kaw na red arrow hte madun da ai hte maren:
Charge galaw ai shaloi, control IC X1 gaw 5th pin VDD hte 6th pin VSS lapran na voltage hpe galoi mung yu na re. Ndai voltage gaw overcharge cut{4}}off voltage hta grau kaba ai (sh) maren sha rai nna, overcharge voltage a aten ladaw hpe hkan sa ai shaloi, X1 gaw 3rd pin hpe hkang ai hku nna MOS tube Q2 hpe pat kau na re. Q2 hpe pat kau ngut ai hpang, charge circuit hpe daw kau ai (Q2 a hkum hkrang diode D2 hpe mung reverse cut{12}}off galaw ai). Ndai aten hta, battery gaw pru wa lu ai.
Lahta na masa lahkawng kaw na langai mi hpe hkan sa ai shaloi, charge makawp maga ai lam hpe shapraw mai ai: 1. Battery cell a lahkawng maga na voltage gaw, makawp maga lam a makawp maga ai lam a overcharge voltage de hkrat wa ai IC{1}} Battery pack a pru wa ai npawt nhpang hta n-gun n law ai aten du hkra, battery pack a pru wa ai jahtum hta load langai hpe bang u.
▌ Ninghtawn{0}} n-gun n-gun hpe makawp maga ai lam
Battery gaw n-gun hpe lahkawng maga na load de shapraw ai shaloi, lawu na sumla hta na red arrow hte maren current lwi ai.
Battery hpe hpaw dat ai shaloi, control chip IC X1 gaw 5th pin hku nna C1 ntsa na voltage hpe mu lu na re. Ndai voltage gaw discharge cut{4}}off voltage hta n law ai rai nna aten ladaw langai mi tup nga ai shaloi, control IC gaw DO pin hku nna Q1 hpe gang je kau na matu hkang na re, ndai aten hta discharge circuit hpe dawm kau na re.
Lahta na masa ni hpe hkan sa ai shaloi, IC X1 gaw over{1}} n-gun n-gun hpe makawp maga ai lam hpe matut mahkai ya ai: lit hpe yeng seng kau u, battery pack hpe charge galaw u, VM-VDD lapran na voltage gaw over{3}} n-gun bai jat wa ai voltage manu de du wa ai shaloi, control IC X1 gaw MOS tube Q1 hpe bai hpaw na re.
▌ Hkrang n kap ai/kadun ai circuit hpe makawp maga ai
Grai makawp maga ai lam gaw IC X1 a lahkawng ngu na pin (VM) hku nna control MOS tube hku nna lwi nga ai voltage hpe mu lu ai. Voltage grai kaba nna aten ladaw langai mi tup nga ai rai yang, control IC gaw Q1 hpe pat kau nna, discharge circuit hpe dawm kau na re. Output load hpe shaw kau nna, control IC gaw Q1 hpe shi hkrai shi bai hpaw na re.
▲ Makawp maga ai lam gaw 21A lithium battery makawp maga ai board re
Dai majaw, n-gun grai ja ai makawp maga ai voltage VM gaw 0.1 ~ 0.2V rai nna, ndai manu gaw IC model hte seng ai.
VM hta n-ga, ya aten hta grai makawp maga ai manu gaw, MOS tube lahkawng Q1 hte Q2 a on{0}} hpe bai htang ai lam hte mung matut mahkai nga ai. MOS tube a on{3}}resistance gaw grau kaba ai rai yang, makawp maga ai current manu gaw kaji na re.
Ga shadawn, MOS tube a kata na n-gun gaw 20mΩ rai nna, lata la ai control IC gaw 0.15V a manu hpe grai law hkra lu ai rai yang, grai law ai makawp maga ai current gaw: 0.15V/(0.02*2){5}}A rai ra ai.
▌ IC hkrat sum ai shaloi makawp maga ai lam
Nkau makawp maga board ni gaw kata kaw fuse ni nga na re, dai gaw control IC n lu ai hpang lahkawng ngu na makawp maga ai lit hpe gun hpai na re, raitim, teng sha manu jahpu hpe mung jat wa na re.
