Okulondoola obudde kwa ddala-Kiki?
BMS yeetaaga okumanya ebigenda mu maaso munda mu paaka. Voltage buli cell, total current, ebbugumu ku points eziwera. Data eno ejja mu continuously, so si sampled omulundi gumu mu kaseera. Ekyo kya ddala-Okulondoola obudde.
Okupima kwa vvulovumenti .
Wano ssente ezisinga we zigenda mu dizayini ya BMS.
Buli cell oba parallel group yetaaga line yaayo eya voltage sense okudda ku analog front end IC. Ku pack ya 16s eyo eddukanyizibwa. Ku 100S+ EV pack otunuulira multiple AFE chips daisy-okujeemera awamu, empuliziganya eyeetongodde wakati waabwe, ne waya harness etwala okufuba okwa nnamaddala okuyisa obulungi. Noise pickup lulwana lwa buli kiseera. Waya za Long Sense zikola nga antenna. Ebibiri ebikyusiddwa biyamba. Okukuuma waggulu-amakubo agaliwo kati okuva ku layini z’amakulu kiyamba ebisingawo.
Afe accuracy spec esinga nnyo abantu okusuubira. Obutoffaali bwa NMC bulina mpozzi 1.4V za vvulovumenti ezisobola okukozesebwa. Ku 4.2V ojjudde. Ku 4.25V oba o plating lithium n'otta cell. Oyo ye 50mV ya margin. Singa AFE yo eba n'obutuufu bwa ±15mV omaze okwokya okuyita mu kitundu ekisukka mu kimu eky'embalirira yo ku nsobi y'okupima yokka. Eno y'ensonga lwaki high-Voltage packs okuva mu supplier ya lithium battery pack yonna esaanira ekozesa AFES-6815, 6813, omutendera ogwo. Eza layisi zikola bulungi ku 4S Power Tool Packs. Si lwa kusika.
LFP esinga kusonyiwa ku nkomerero ya waggulu naye voltage curve ebeera flat nnyo wakati ne soc okubalirira okukaluba. Okwetaaga obutuufu obulungi olw’ensonga ey’enjawulo.
Mu buliwo
Hall Effect sensa oba shunts. Ebisenge biba bya njawulo mu masannyalaze ekintu eky’anguyira dizayini. Shunts zisinga kutuufu naye zituula mu kkubo lya current, kale BMS sensing circuit yetaaga okukwata common-mode voltage yenkana pack voltage. Si kitono ku nkola ya 400V.
Shunts nazo zisaasaanya amaanyi. A 100μω shunt ku 500A ekka 50mV n’okwokya 25W. Ebbugumu eryo ly’olina okuddukanya. Era shunt resistance ewunyiriza n’ebbugumu, kale okusoma okuliwo kati kuwugula nalyo okuggyako ng’osasula. Dizayini za BMS eza layisi tezikola. Olwo Soc n’atambula mu bbanga ly’olunaku nga tewali amanyi lwaki.
Ebbugumu
Thermistors zibeera za buseere. Okuteeka ekifo kye kitundu ekizibu.
Pack eyinza okuba n’obutoffaali 200 naye nga 6- 8 zokka sensa z’ebbugumu. Bagenda wa? Obutoffaali obuli mu kifo kya geometry businga kuba businga kuba bwa bbugumu kubanga buzingiddwamu ensibuko endala ez’ebbugumu. Obutoffaali okumpi ne casing bufiirwa ebbugumu eri ambient. Obutoffaali obuli okumpi ne busbars busitula ebbugumu eryakolebwa okuva mu biyungo eby’amasannyalaze amangi. Omukozi wa lithium battery system akola kino akola bulungi CFD oba waakiri thermal model ennyangu nga tannaba kwewaayo mu bifo bya sensa. Abasigadde bateeka thermistor emu buli module era basuubira okusinga.
Sensulo erina okukwata ku katoffaali. obutalengejja mu mpewo okumpi n’akasenge. Ebbugumu ly’empewo eriri munda mu kisenge terikutegeeza kumpi kintu kyonna ku bbugumu ery’okungulu kw’obutoffaali. Tulabye enjawulo ya diguli 8-10 wakati w’empewo n’obugulumivu bw’obutoffaali mu paaka ezaali zirabika obulungi ku mpapula.
Ebintu ebikozesebwa mu kukola ebbugumu nabyo bikulu. Okukwatagana okukalu wakati wa thermistor ne cell can kirina obuziyiza obw’ebbugumu obw’amaanyi. Okusoma kusigadde emabega. Sensulo we yalage 45℃obutoffaali buyinza okuba nga bwatuuka dda ku 52℃ne bulinnya.
BMS by'ekola ne data .
Soc okubalirira kye kintu ekikulu. Coulomb okubala kugatta current mu bbanga. OCV Okunoonya kukwatagana ne vvulovumenti y’okuwummula okutuuka ku mbeera ya chajingi. Kalman filters oba ebifaananako bwe bityo bigatta ebibiri bino. Tewali n’emu ku zino ekola bulungi. Coulomb okubala drifts kubanga current measurement tetuukiridde era toyinza kumanya starting point entuufu. OCV Lookup yeetaaga pack okuwummula okumala akaseera ekintu ekitabaawo mu continuous operation. Kalman filter eyamba naye nga nnungi yokka nga cell model gye yazimbako, era obutoffaali bukaddiwa.
Okubalirira kwa SOH kulondoola okuvunda. Obusobozi buggwaawo, okukula kw’obuziyiza. Kino kitera okutegeeza buli luvannyuma lwa kiseera okuddukanya ekisannyalazo ekifugibwa oba okufuluma n’okugeraageranya ku ntandikwa. Enkola ezimu zigezaako okugiteebereza ku yintaneeti okuva mu data y’emirimu. Ebivuddemu byawukana.
Protection logic nnyangu. Voltage waggulu nnyo, lekera awo okucaajinga. Wansi nnyo, mulekere awo okufulumya. Current waggulu nnyo, disconnect. Ebbugumu eriri waggulu nnyo, ereka oba okukutuka. Bino biba bigerageranya ku threshold byokka. Okufuna thresholds right kitwala ekirowoozo ekimu-Too tight era ggwe false-Trip buli kiseera, too loose n'oleka obutoffaali okwonooneka.
Okubalansiza .
Obutoffaali buwuguka okumala ekiseera. Passive balancing eyokya charge esukkiridde okuyita mu resistors, mu bujjuvu ku 50-100mA. Kiba kigenda mpola. Mu kiseera ky’okusalirawo enzirukanya ya chajingi ey’essaawa 4 eyinza okutambula 200-400mAh. Singa obutoffaali bwo buba 2000mAh out of balance that's not going to cut it.
Active balancing ekyusa charge wakati w’obutoffaali nga ekozesa inductors oba capacitors. Yanguwa nnyo, ekola bulungi, ya bbeeyi, nzibu. Ku makolero lithium battery solutions nga packs cycle hard buli lunaku, active balancing ekola amakulu. Ku pack etuula ku 50% SOC ebiseera ebisinga ng’okozesa oluusi n’oluusi, passive ebeera nnungi.
Enjogerezaganya
Bus ya can ku mmotoka. Modbus olw'okuyimirira. Bombi bakola. Londa kyonna enkola endala gy’ekozesa.
Cloud connectivity ewulikika bulungi ku lupapula. Mu nkola ekitundu ky’ebifo birina siginiini y’obutoffaali bwa kasasiro era omuteeka teyakola ssente za antenna ey’ebweru. Okutema data mu kitundu n’okuteeka buli luvannyuma lwa kiseera kikola bulungi ku kussa mu nkola kwa lithium battery provider okusinga obungi okusinga okulowooza ku kuyungibwa okutambula buli kiseera.
Omutindo .
ISO 6469 ne UN ECE R100 ku mmotoka. UL 9540 olw’okutereka ebintu ebiyimiridde. OSHA ne koodi z’omuliro ez’omu kitundu ez’ebifo ebisasulira amakolero. Omukwanaganya wa Lithium Battery OEM alina okumanya ebikwata ku katale k’ogenderera. Ebyetaago by’okulondoola okweyawula mu mutindo gw’emmotoka bitambula abantu okusinga ekintu ekirala kyonna mu kukola volume.
REAL-Okulondoola obudde si kwa kwesalirawo. Ekibuuzo kiri nti obutuufu n’obumanyirivu bwe weetaaga, era ekyo kisinziira ku butoffaali, okukozesa, n’ebiva mu kukifuna mu bukyamu.
