How Can You Extend Solar Cell Life | Charging Cycles, Temperature Control, Maintenance

Control charge discharge depth at 20%–80%, cycle life can reach 4000 times; environment temperature keep 15–25℃, every quarter test measure capacity and calibrate BMS extend life.

Charging Cycles

Control discharge depth

Store energy cell's physical decline reduces speed rate with single time discharge depth (DOD) present positive index connect relation relation, take daily DOD number value from 90% press shrink to 50%, phosphorus acid iron lithium cell's can use cycle total times will from 3000 times violent increase to 6500 times above. According to 5kWh capacity's single body cell test try model carry out measure calculate, every time force line release put 4.5 degrees electricity will lead cause electric core inside part's SEI film increase thick about 0.2 micro meters, and limit release put 2.5 degrees electricity then can take inside block grow rate firm firm control at every year 2.5% inside.

· Towards 12V 200Ah deep cycle lead acid cell, set fix reverse change device at end electric pressure drop arrive 11.8V (match answer about 30% left remain electric amount parameter) time cut break negative carry, can block stop 85% not can reverse turn extreme board sulfur transform rate.

· Every day, maintain 20% to 80% shallow charge shallow discharge section space run row, mutual compare at 0% to 100% full negative carry run turn model pattern, system at long reach 10 years' life cycle period inside can save down big about 1200 US dollars' cell replace change budget.

· At match set sun energy array time, take light volt board's total install power redundant degree lift rise 25%, can protect prove even if at continuous 3 pieces cloudy rain day's gas elephant drop water amount data number under, cell group's most low SOC value still ran can stop stay at 40%'s safe whole threshold value's top on.

Limit flow

Charge electricity multiple rate (C-rate) parameter set fix lean high will induce send hot lose control rate rate up rise, towards 100Ah's lithium cell group continuous enter enter exceed pass 50A (exactly 0.5C multiple rate)'s direct flow electricity, electric core surface temperature will at 45 minutes inside climb rise 18.5℃. At the sun energy charge electricity control device's MPPT count method track trace under, take peak value charge electricity electric flow limit fixed at cell total forehead fixed capacity's 0.2C, false set 48V 300Ah system's most big charge electricity electric flow set for 60A, can take electric energy transform change efficiency steady fix protect keep at 97.5%.

· Lead acid cell at receive receive exceed pass 0.15C's big electric flow pour enter time, inside part electric solve liquid's water split gas transform wave send speed rate will violent increase 32%, lead cause single branch 2V electric core every 6 pieces months then need extra outside fill add 150 milliliters' go leave child steam distill water.

· Set fix BMS (cell tube logic system)'s discharge electricity pass flow protect protect threshold value for forehead fixed run row electric flow's 1.2 times, for example, one stand 3,000W reverse change device match match 24V system, take blink time protect protect electric flow set for 150A, can take electric surge make become's life span damage exhaust drop low 80%.

· At sunrise, the sun shines radiate shine degree reach arrive 800W/m²'s direct noon time divide, take light volt extreme's short road electric flow transform change for constant flow step section (Bulk step section)'s enter enter electric flow, maintain keep 1.5 hours to 2.5 hours, can charge enter complete whole system day equal need seek electric amount data number's 75%.

Set exact electric pressure value

Wrong mistake match set three step section charge electricity electric pressure parameter is add speed extreme board report waste's main reason, give 4 string structure build 12.8V's phosphorus acid iron lithium cell set fix 14.6V's suck receive electric pressure (Absorption Voltage) long reach 4 hours, will let the electric core's body volume swell expand rate increase add 12%. Take this parameter down to 14.2V and take constant pressure continuous time shrink subtract to 1.5 hours, single time charge electricity only lose lose not arrive 2.5%'s extreme limit charge enter capacity, yet can exchange take complete body cycle life life cycle period extend long 28.5%'s long period account face receive benefit.

· Float charge electric pressure (Float Voltage)'s set fix deviate difference at 0.2V inside then will produce physical quality change, take lead acid cell's float charge value fixed at 13.5V and not is normal rule's 13.8V, can take board grid rot eat's speed degree delay slow 15%.

· Towards work at -10℃ high latitude degree climate earth's sun energy system, control device must open start -30mV/℃'s temperature fill compensate merit ability, deny else extreme low temperature environment under cell will out appear at least 22% lack charge electric amount lose lose.

· Lithium cell system at full electricity after stop stop enter enter exactly can, when BMS detects measure arrive single body electric pressure touch bump 3.45V's face border value time, cut break charge electricity back road can 100% clear remove high SOC shape state under bring extreme transform electric pressure press force.

Measure pressure flat difference

String connect cell group at run row about 180 days after, due to single body inside block's self nature exact shape divide distribute square difference, single knot cell exactly between's electric pressure difference go towards will expand big to 150mV to 250mV's range bounds. Start up host move flat equal electric child mold block, take 2A's turn move electric flow take high pressure extreme that extra outside's 0.5 degrees electricity move transport to low pressure extreme electric core, can at 3.5 pieces hours inside take complete group string connect pressure difference heavy new receive narrow to 30mV's exact degree standard rule range bounds inside.

· Towards open mouth style rich liquid lead acid cell, every 30 days hold run one time electric pressure high reach 15.5V's flat equal charge electricity (Equalization Charge) sequence step, continuous maintain keep 120 minutes' strong line pass charge shape state.

· 15.5V high pressure dash hit produce out's gas body flip roll effect answer can hit break thick degree difference extreme transform out appear elephant, let bottom part high reach 1.30g/cm³'s electric solve liquid with top part 1.10g/cm³'s thin solve liquid mix combine uniform evenly, find back 5.5% because sour liquid divide layer throw lose's capacity.

· Phosphorus acid iron lithium cell strict forbid bear receive exceed pass 15V's break bad nature flat equal electric pressure, if BMS quilt move flat equal electric block's exhaust consume power only is 50mA, towards for total count 20kWh capacity's huge big system and speak, at least need continuous work 48 hours talent can fix correct 1.5%'s SOC deviate difference rate.

Temperature Control

Hot bad did

Sun energy cell's physical decline reduces rate towards environment temperature's rise high present appear index number level put big reverse response, 25℃ by project work boundary draw fix for standard test try base standard thread. Gas temperature cross 25℃ mark fix data number after, every continuous rise high 10℃, lead acid cell inside part positive extreme board grid's rot eat speed rate and electric solve liquid's water split gas transform wave send speed rate will increase add one double, original base standard call life span 10 years' store energy group at 35℃ environment middle can only support arrive 4.8 years.

Gas temperature violent rise to 45℃ section space time, phosphorus acid iron lithium cell inside part's SEI film will add speed solve melt, partner follow with electric solve liquid's vice reverse response violent severe increase add, single body electric core's inside block will at 90 days inside from 0.4 milli ohms climb rise to 1.2 milli ohms above, lead cause single time charge discharge electricity cycle produce out's not can reverse turn capacity rub wear reach arrive 0.05%.

Experiment test room long reach 60 pieces months' continuous watch measure total count display clear, take total capacity 20kWh's cell group long period put place at flat equal temperature reach arrive 38℃'s iron skin room inside, cell's SOH (health degree parameter) at number 32 piece month then will break cliff style drop through 70%'s report waste base standard thread, mutual compare at safe set at 22℃ constant temperature room inside's test try sample book, high reach 3800 US dollars' setup match capital property by lift early through branch did 55%.

Freeze stiff did

At 0℃ below, the low temperature environment, row run, electric solve liquid's sticky thick degree will follow with temperature drop fall present appear not thread nature violent rise, extreme big block stop did lithium leave child's pass transport pass through speed rate. Gas temperature violent drop to -10℃ time, standard call capacity 100 Ah's lithium cell single time most many can put out 68 Ah to 72 Ah's have effect electric amount, near 30% store energy capacity by high raise's inside part physical block resist strong line lock fix.

If at -20℃ extreme end ice point parameter under still ran enter enter 0.2C above's constant fix electric flow, lithium leave child no way fast speed insert enter stone ink negative extreme, will at electric core inside part knot crystal form become sharp pointed' lithium branch crystal, pass cross 15 times to 20 times low temperature strong make charge electricity, separate lithium knot crystal then will physical pierce through thick degree only is 16 micro meters' separate film, lead send inside part micro short road trouble barrier.

Towards one set of 48V 400Ah's leave net store energy system push add -5℃ environment under's charge electricity work industry, reverse change device detect measure arrive's single body extreme electric pressure will at extreme short's 45 seconds inside from 3.1V empty high climb rise to 3.55V's full electricity cut stop threshold value, touch send system cut break charge electricity back road, complete body day equal real exact store enter electric amount real exact measure drop fall broad degree reach arrive 42%.

Protect warm layer

Give cell hit make one piece physical separate absolute outside part violent severe temperature difference's save put empty space, is press low temperature damage exhaust budget nature price match ratio extreme high's hard install throw enter. Adopt use squeeze plastic gather benzene ethyl alkene bubble沫 (XPS) board material piece connect cell constant temperature box, thick degree set fix for 50 milli meters, its lead hot tie number can press low to 0.028W/(m·K), can block stop outside boundary 85%'s blink state hot pass lead dry involve.

At one piece inside part empty space body volume 1.2 cube meters' cell box four walls paste full bring have aluminum foil reverse shoot layer's double layer gas block rubber felt, material total flower spend big gather at 150 US dollars to 220 US dollars float move, yet can let box body inside part's day night temperature difference wave move broad degree from room outside's 18℃ violent change flat press to 3.5℃ narrow broad section space.

At latitude degree high at 45 degrees' extreme cold area domain, give room outside independent swing put's deep cycle lead acid group wrap wrap one layer R value is 10's glass fiber protect warm cotton, and at bottom part pad on 20 milli meters thick's prevent wet rubber subtract shock pad, can take winter season single body surface's scatter lose hot power from every hour 45W cut subtract to not foot 8W, strong line protect stay did 25%'s have effect continue sail time.

Pass wind amount

Secret shut empty space inside accumulate waste hot if no way to pass cross empty gas towards flow put exchange, will at cell group top part form become hot island gather gather effect answer, let string connect back road middle up direction electric core's run row temperature compare bottom part high out 4℃ to 6℃. Lead enter bring have temperature pass feel probe head's host move row wind setup match, room inside probe head catch catch arrive empty gas temperature reach arrive 28℃ time, stand carve start up forehead fixed flow amount 150 CFM (cube English foot every minute)'s industry business level axis flow row wind fan. According to every 10kWh cell capacity match prepare 80 CFM wind amount's parameter match match, wind machine every run turn 1 hour only exhaust consumes 0.05 degrees electricity, can take box body inside's high temperature towards outside row scatter about 1200 BTU.

Towards 24 pieces 2V 1000Ah big single body group becomes huge big array, at machine room two sides towards angle thread position fix open hole install straight path 250 milli meters' enter row gas hundred leaf window, protect keep wind speed 1.5m/s's self nature towards flow, can take big electric flow discharge electricity end period extreme pillar position fix produce out's 65℃ local part high temperature swift fast press system at 32℃'s safe whole mark thread inside.

Probe head control temperature

Sun energy charge electricity control device must pass cross physical thread cable connect enter special belong's cell temperature pass feel device (BTS), complete finish millisecond level's real time electric pressure fill compensate calculate count. Take hot sensitive electric block probe head use lead hot silicon glue tight paste at cell group middle space position fix's electric core outside shell on, obtain take most exact's inside part middle heart send hot deviate difference value.

System measure fix arrive environment temperature every deviate leave 25℃ base standard 1℃, control device press set fix good's -3mV/℃/Cell slant rate self move micro adjust charge electricity electric pressure. When the winter season, the storehouse room temperature drops to 5℃ time, towards the 24V system (which includes 12 pieces of 2V single bodies), the control device will self-move take float charge electric pressure from the 27.6V strong line up adjust to 28.32V.

Cancel 0.72V's electric pressure fill compensate move make, will lead cause 5℃ environment under's extreme board long period stop stay at 85% left right's lack charge electricity shape state, continuous 90 days lose electricity run row will let extreme board down half part produce out thick degree reach 1.5 milli meters' not can reverse turn sulfur sour salt transform knot crystal layer, damage exhaust drop total capacity's 12%.

Maintenance

Measure sour liquid

Rich liquid style deep cycle lead acid cell at daily charge discharge electricity's transform learn reverse response middle, electric solve liquid inside's water split will take hydrogen gas and oxygen gas's shape state continuous overflow out, single branch forehead fixed capacity 500Ah's 2V electric core at environment temperature 25℃ under continuous run row 30 days, pass normal will wave send drop 45 milliliters to 60 milliliters' liquid state water. Liquid face one morning low at extreme board top extreme, naked expose at empty gas middle's lead extreme board part will at 72 hours inside happen produce face build high reach 15% can not reverse turn oxygen transform, complete piece electric core's can use ampere hour number will blink space steam send drop 10% above.

Prepare one piece carve degree exact degree reach arrive 0.005g/cm³'s light learn compare heavy count, at system complete finish one time 100% full charge cycle after's quiet set number 2 piece hour carry out measure measure. Standard rule room temperature under, health electric core inside part sulfur sour solve liquid's dense degree must steady fix at 1.265 g/cm³ to 1.285 g/cm³'s section space inside. If the measure obtains some single body electric solve liquid compare heavy drop through 1.225 g/cm³, surface clear this area block exist at severe heavy's extreme transform lack charge out appear elephant, single time discharge electricity can release put's have effect power already by strong line press shrink did 35%.

Towards filling water hole, pour enter's must is electric lead rate low at 5μS/cm's go leave child steam distill water or reverse penetrate pure water, mix enter which fear quality measure thick degree only is 50ppm's iron leave child or green leave child mine spring water, all will let extreme board's local part self discharge electricity rate at 48 hours inside violent rise 200%. Fill water move make should exact at charge electricity step section exactly will knot beam front's 30 minutes inside hold run, gas bubble flip roll produce out's 0.5MPa inside part micro move pressure can let new pour enter's pure water and bottom layer high thick degree sulfur sour fast speed mix combine, take liquid face exact exact maintain keep at extreme board most high point up direction 10 milli meters to 15 milli meters' safe whole mark thread place.

Go rot eat

Expose expose at mutual towards wet degree exceed pass 65% empty gas middle's pure copper connect thread extreme child, surface will at 90 days inside attach fix one layer thick degree about 0.1 milli meters' blue green color sulfur sour copper with oxygen transform copper mix combine knot crystal layer. This layer cut bound quality takes original base low to 0.2 milli ohms' metal contact touch electric block blink space put big 40 times, pull rise to 8 milli ohms above. When the system at direct noon time divides take 80A's big electric flow strong line complete whole negative carry output time, micro small's knot crystal layer surface will extra outside produce out about 51.2W's waste hot, take extreme child local part's physical temperature push high to 75℃.

Adjust match one copy quality compare is 1:3's Su Da water solve liquid (carbon sour hydrogen sodium exchange water), use hard hair cut bound brush reverse turn repeat paint wipe at out appear oxygen transform's metal connect head place. Su Da water's weak base nature environment can at 5 minutes inside middle harmony drop high reach 98%'s sour nature rot eat object, straight arrive surface not again pop out straight path 1 millimeter's two oxygen transform carbon micro small gas bubble to stop. Clear reason finish close after, use wipe cloth rub dry water split, at screw thread and extreme child contact touch face on uniform evenly paint wipe one layer thick degree about 0.5 milli meters' resist oxygen transform lead electricity silicon fat, this road work sequence can take empty gas middle water split's penetrate through rate press low 99%, protect barrier not come 12 pieces months inside connect thread extreme's electric pressure drop by firm firm lock fix at 50mV's micro small damage exhaust section space.

Tight connect head

Reverse change device inside part high frequency change pressure device work time produce out's 50Hz to 60Hz physical micro shake move, will smooth follow thread cable pass lead to complete whole cell row frame, let all physical lock tight's screw mother screw bolt bear receive every day exceed pass 86400 times' micro small answer force dash hit. Metal tired labor and worm change effect answer pile add, will lead cause original base reach standard's tight firm force moment every year press 12% to 15%'s match ratio physical decline retreat. One piece original base lock tight force moment is 10 N·m's M8 screw bolt, run row 24 pieces months after real exact left remain twist force pass normal will drop arrive 7 N·m below.

Pull drop array total protect danger thread, cut break all direct flow back road, use bring cut bound hand handle's number word twist force pull hand, towards system inside all string connect and side by side connect's thread cable screw hat carry out return position tight firm. M6 standard rule's not rust steel screw bolt should exact exact push add 6N·m to 8N·m's twist moment, M8 standard rule's screw bolt must pull full to 10N·m to 12N·m's standard test parameter. Tight firm force degree not foot will lead cause contact touch face leave have 0.05 milli meters' micro small space gap, and exceed negative carry twist arrive 15N·m above then will happen produce slide thread, or press crack cell lead extreme pillar lead cause inside part sour liquid take every day 2 milli liters' speed degree towards outside leak leak.

Measure inside block

One piece standard call capacity is 12V 200Ah's complete new AGM glue body cell, out factory time's early start inside block parameter pass normal mark record at 3.5 milli ohms to 4.2 milli ohms exactly between. Follow with cycle times number's pile add, sulfur sour lead knot crystal at extreme board micro hole middle's pile accumulate face build take every year 5%'s speed degree increase grow, block plug did 60% above's leave child exchange exchange pass road, inside block number value also follow it produce out not thread nature violent rise.

At every separate 180-day set fix's maintenance protect cycle period inside, use frequency rate set fix for 1kHz's special industry cell inside block test try instrument, chase one towards array middle's electric core carry out parameter lift take. When the test tries screen curtain display clear's single body inside block exceed pass early start forehead fixed number value's 1.5 times (for example, from 4.0 milli ohms to 6.0 milli ohms) time, this cell's health degree (SOH) has already dropped through did 80%'s warn guard thread. If some piece of electric core's inside block violent rise to same group flat equal value's 200% above, big electric flow charge electricity time will cut leave complete whole string connect back road on 15% above's electric pressure match forehead, take it transform change for pure pure's send hot power.

Record data number

Take every one time real exact measure obtain take's electric pressure difference, compare heavy deviate leave value, temperature rise fall wave peak as well as fill water exhaust consume amount record enter track trace surface grid, can at single body electric core happen produce physical crash break's front 6 pieces months, from micro small's slant rate change transform middle push calculate out trouble barrier rate rate.

Build file tracks every piece of electric core's life cycle period file case, pass cross straight direction compare towards number 12 pieces month and number 36 pieces month's same cycle period inside block data number square difference, can exact exact measure guess present front run protect body system's throw capital return report rate. At system run row's number 5 year, surface grid on record record's parameter if display clear complete body discharge electricity efficiency protect keep at 92% above, front period's physical maintain protect time throw enter success merit match exchange did exceed pass 4500 US dollars' hard piece heavy set budget.