Engtin nge state of charge hi estimate ang?
SOC estimate 1000 a ni.
Battery hman lai hian battery pakhata charge (SOC) chu parameter pawimawh ber pakhat a ni. SOC hi charge/discharge rate (current), temperature, self-discharge, leh aging ang chi thilin a nghawng avangin battery te hian hman laiin nonlinearity sang tak an lantir a, hei hian SOC estimate dik tak chu a ti harsa hle.
SOC estimation tih dan tur .
hman tlanglawn .SOC estimation tih dan tur .Discharge experiment method, ampere-hour integration method, Open-circuit voltage method, load voltage method, internal resistance method, neural network method, leh Kalman filtering method te pawh a tel.
1) Discharge experiment hmanga thil tih dan tur. Discharge experiment method hi SOC estimation method rintlak ber a ni. Continuous discharge atan constant current a hmang a, discharge current leh time product chu charge la awm chu a ni. Discharge experiment method hi laboratory-ah hman a ni fo a, battery zawng zawngah hman theih a ni a, mahse a chhiatna langsar tak pahnih a nei a: pakhatnaah chuan hun tam tak a mamawh a Pahnihnaah chuan battery hnathawh chu tihtawp a ngai a ni. Discharge experiment method hi electric lirthei tlan lai tan a tha lo a, mahse electric vehicle battery enkawlna atan pawh hman theih a ni.
2)Ampere-Darkar inzawmkhawm dan. Ampere-hour integration method hi SOC estimation hman tlanglawn ber a ni. Mahse, he method hian a hnuaia harsatnate hi a nei a ni: dik lo .current tehna .SOC calculation deviation-ah a hruai a, hun kal zelah tihsual a pung khawm a, a lian chho zel a; Charge-Battery-a discharge efficiency ngaihtuah a ngai a; Errors chu high-temperature condition hnuaiah emaw, battery a inthlak danglam chuan emaw a lian zawk thin. Current tehna dik lo chu high-performance current sensor hmangin chinfel theih a ni a, mahse a man a sang chho zel a; Charge solving charge-discharge efficiency chuan experimental data tam tak master a ngai a, charge-discharge efficiency atana empirical formula siam a ngai bawk. Electric vehicle battery zawng zawng tan ampere-hour integration method hman theih a ni. Tuna tehna hi a dik a, a tir lama estimation state atana data tling a awm chuan SOC estimation method awlsam leh rintlak tak a ni thei.
3)A hawng-circuit voltage hman dan. Discharge tawp lama battery pakhat circuit voltage chu battery electromotive force nen a inhnaih hle. Cobalt-acid battery electromotive force hi electrolyte concentration a innghat a, battery discharge nen proportional-a tlahniam a nih avangin Open-circuit voltage hmangin SOC estimate theih a ni. MH/NI battery leh lithium-ion battery te tana open{{8} circuit voltage leh SOC inzawmna linearity hi cobalt-acid battery angin a tha lo hle a, mahse an inzawmna tur chu SOC estimate nan hman theih a la ni tho a, a bik takin charging tan leh a tawp lamah result tha zawk nen. Open-circuit voltage method-a harsatna lian tak chu battery chu voltage a stabilize theih nan hun rei tak a chawlh a ngai a, battery state chu a hnathawh atanga a dinhmun nghet taka a lo harh chhuah theih nan darkar engemaw zat emaw darkar sawm aia tam emaw a ngai a, chu chuan tehnaah harsatna engemaw zat a thlen a Eng chen nge chawlh hun tur tihfel pawh hi harsatna a ni a, chuvangin he hman dan hi a chauh hman a nih chuan parked state-a electric lirthei tan chauh a tha. Open-circuit voltage method hian charging tan tirh leh tawp lamah SOC estimation performance tha tak a nei a, ampere-hour integration method nen a inkawp fo thin.
4)Load voltage hman dan tur. Instant discharge a tan chuan voltage chu open-circuit voltage state atanga load voltage state thlengin rang takin a inthlak thin. Battery load current chu a awm reng chuan SOC nena load voltage danglamna pattern chu Open-SOC hmanga circuit voltage nen a inang a ni. Load voltage method thatna chu battery pack soc chu real time-in a estimate thei a, constant-current discharge laiin result tha tak a nei bawk. Practical application-ah chuan driver battery voltage hian load voltage hman danah harsatna a thlen thin. He harsatna chinfel nan hian battery voltage data, independent dynamic load voltage, leh SOC te mathematical model a ngai a; Chuvangin, load voltage method hi lirthei tak takah chuan hman a tlem hle a, mahse battery charge criterion atan hman a ni fo-discharge cutoff.
5) Chhungril lama dodalna hmanrua. Battery internal resistance hi AC internal resistance leh DC internal resistance ah then a ni a, chungte chu SOC (State of Charge) nen a inzawm tlat a ni. Battery AC impedance hi battery voltage leh current inkara transfer function a ni a, complex variable a ni a, chu chuan battery-in AC current a do theihna a entir a, AC impedance meter hmanga teh a ni. Battery AC impedance hi temperature hian nasa takin a nghawng a; Battery a settled hnua open-circuit state-a teh tur nge charging leh discharging lai emaw chu sawisel hlawh tak leh lirthei tak takah hman a tlem hle. DC Internal Resistance hian battery-in DC current a do theihna a entir a, hun rei lo te chhunga battery voltage inthlak danglamna leh current inthlak danglamna ratio nen a inang a ni. A tak taka tehnaah chuan battery chu open-circuit state atanga tan constant current-ah charge emaw discharge emaw a ni a; Load voltage leh open-circuit voltage inkar danglamna chu hun bituk chhunga, current value-a then chu DC internal resistance a ni. Lead-acid battery tan chuan DC internal resistance hi a hnu lama discharge stage-ah nasa takin a pung a, battery SOC estimate nan hman theih a ni a MH/NI battery leh lithium-ion battery te DC internal resistance variation hi lead-acid battery nen a danglam a, hman a tlem hle. DC internal resistance magnitude chu chhut hun chhung hian a nghawng a ni. Hun bi hi 10ms aia tawi a nih chuan ohmic internal resistance chauh hriat theih a ni a; Hun bituk a rei chuan a chhunga resistance chu a buaithlak zual zel a ni. Cell pakhat chhunga a chhunga resistance dik taka teh chu a harsa a, chu chu DC internal resistance method drawback a ni. Internal resistance method hi battery pakhata discharge hnuhnung zawka state of charge (SOC) estimate nan a tha a, ampere-hour integration method nen pawh hman theih a ni.
6)Neural network hman dan. Battery hi nonlinear system sang tak a ni a, a charge-discharge process atan mathematical model dik tak siam a harsa hle. Neural network-te hian fundamental nonlinear characteristics, parallel structure, leh zirlai theihna an nei a. Anni hian external excitations atan corresponding output an siam thei a, chutiang chuan battery dynamic characteristics chu SOC estimate turin an simulate thei bawk. A tlangpuiin 3-layer neural network hi battery SOC estimate nan hman tlanglawn a ni a: input leh output layer-a neuron awm zat chu problem requirement tak tak atanga teh a ni a, a tlangpuiin linear function a ni Hidden layer-a neuron awm zat hi harsatna complexity leh a mamawh analysis accuracy-ah a innghat a ni. Battery SOC estimate na atana hman tlanglawn input variable te chu voltage, current, accumulated discharged capacity, temperature, internal resistance, leh ambient temperature te an ni. Neural network input variable thlan hi a dik em tih leh variable awm zat hian a dik em tih chu model dikna leh computational load dik tak a nghawng nghal vek em tih a ni. Neural network method hi battery hrang hrangah hman theih a ni a, mahse a chhiatna chu training atan reference data tam tak a mamawh a, estimation error chu training data leh training method hian nasa takin a nghawng a ni.
7)Kalman filter hman dan. Kalman filter theory ngaihdan bulpui ber chu dynamic system pakhat dinhmun chu minimum variance tih awmzia neia siam a ni. Battery SOC estimation-a hman a nih chuan battery hi dynamic system anga ngaih a ni a, SOC hi a internal state zinga mi a ni. Battery SOC estimate na atana Kalman filter method zirchianna chu tun hnaiah chauh a tan a ni. Hetiang hmanrua hi battery hrang hrang atan a tha a, hmanraw dang nena khaikhin chuan Electric Vehicle Battery Packs te chu current inthlak danglamna lian tak tak nei te tan SOC estimation atan a tha hle. SOC estimate a pe mai bakah SOC estimation error a pe bawk. Mahse, he method hian a that lohna chu algorithm hi a complex lutuk a, system-a computational capability sang tak a mamawh avangin practical stage-ah a la lut lo a ni.
SOC estimation method hrang hrang chungchanga zirchianna thuk tak hmangin, ampere-hour integration method chu a tir lamah chuan a bulpui atan thlan a ni. Battery current dik taka tehna hmangin, open-circuit voltage method nen a inzawm a, battery charge-discharge efficiency, temperature, aging, leh self-discharge te ngaihtuah a, electric vehicle thianghlim tak takte power battery dynamic chu a awm thei a ni. Electric lirthei thianghlim tan chuan battery pack hian a bul berah chuan full-charge leh full-discharge state-ah a thawk a, charging process tam zawk chu constant-Tun dinhmunah a awm a ni. Charging an tih zawh hnuah initial value determination point a stable deuh hlek a (charging zawh chuan SOC chu 100% emaw a overcharged deuh emaw a ni). Battery pack-a charge-discharge efficiency a sang hle (95% aia sang) a nih chuan charge-discharge efficiency chu 1 emaw, constant value engemaw zat emaw nen a inang thei a ni. Hetiang hmang hian SOC chhut nan hian result tha tak tak a hmu thei a ni. Charge tinte accumulated error-discharge cycle chu a bul berah chuan a hnuaia charging tihfel a nih chuan a bul tanna SOC value recalibration nen a bo vek a ni.
SOC estimation input dik tak hriat theihna turin battery voltage, current, leh temperature information te chiang taka tehna sang-a tih hian theoretical analysis leh experimental data fitting hmanga battery model tha tak din a nih chuan; Charge tawp lama SOC siamthat leh SOC tihsual awmsa tihbo nan discharge; Tin, battery charge-discharge efficiency factors, temperature, aging, leh self-discharge effects te ngaihtuah hian high-Precision estimation of system SOC a thleng thei a ni. Battery state-of-charge estimation algorithm chu Figure 17-12-ah hian kan hmu a.
(1) SOC initial value chhiar dan .SOC initial value chu power-off-a dah SOC leh temperature-OCV-Soc lookup table atanga SOC hmuh chu system offline time nena inzawm coefficient hmanga multiply a ni. SOC initial value hi system a power on apiangin chhiar a ngai thin.
(2) Cell pakhat zel SOC value chhiar dan leh Cell pakhat zel SOC value siamthatna SOH valueBattery capacity chu temperature leh charging current hmanga table en atanga hmuh a ni a, battery capacity chu SOH hmanga table enin siamthat a ni. Current chu ampere-hour method hmangin integrated a ni a, chu chu SOC change value hmuh theihna tur capacity hmangin a then a ni. SOC change value chu individual cell SOC value hmuh theih nan initial value ah add a ni.
(3) Battery Pack Soc chhiar dan .System chu power on leh a nih chuan read SOC initial value chu battery pack soc angin an la a; Discharge condition-a a awm chuan battery pack SOC chuan cell pakhat zel SOC zinga value tlem ber a chhiar a; Charging condition leh charging a zawh loh chuan battery pack SOC chuan maximum module SOC value a chhiar a; Charging condition leh charging zawh a nih chuan battery pack SOC chu 1 ah dah a ni.
(4)Cell pakhat zel SOC siamthat dan tur charge/discharge tawp lamah .System chu charging condition-ah a awm a, battery pack SOC chu 0.8 aia tam a nih chuan, chu system chu charging tawp lamah a awm tihna a ni a System chu discharging condition-ah a awm a, battery pack SOC chu 0.3 aia tlem a nih chuan, chu system chu discharging tawp lamah a awm tihna a ni. System chu charge/discharge tawp lamah a awm a nih chuan SOC chu siamthat a ngai a ni. Charge/discharge tawp lama SOC chhut dan chu temperature, charge/discharge current, leh voltage hmanga table enin SOC value hmuh a ni.
