Pūnaha Whakahaere Pūhiko – BMS is a core important part people can’t ignore while building their own lithium battery pack. Some people maybe confused about how to choose the right BMS for a lithium battery pack. Below are some tips:
NO.1 Confirm the lithium battery type
Different lithium battery cells have different nominal voltages. Hei tauira, ternary lithium nominal 3.6V, lithium iron phosphate nominal 3.2V, and lithium titanate nominal 2.0V. Depending on the type, the protection IC of the BMS is also different.
Hei tauira, a ternary lithium battery, a conventional protection IC, the overvoltage of the single cell will be around 4.25V, and the undervoltage of the single cell will be around 2.8V. The IC of lithium iron phosphate generally sets the overvoltage of the cell to about 3.7V and the undervoltage of the cell to about 2.5V.
NO.2 Whakapumautia te maha o nga raupapa papahiko lithium
Ko te maha o nga raupapa papahiko lithium e hono tika ana ki te ngaohiko. Hei tauira, lithium ternary 20 te maha o nga raupapa pākahiko lithium, ko te ngaohiko ingoa ko 72V, me te awhe ngaohiko ko 60V ~ 84V.
Ko te ngongo BMS MOS me te TVS kua tohua me tu ki te uara ngaohiko neke atu i te 100V. Kore, ka pakaru te pākahiko lithium i te BMS i raro i nga tikanga rereke.
NO.3 Whakapumautia te naianei o te kete pākahiko lithium
Ko te uara o naianei o te kohinga pākahiko lithium he mea tino nui hoki mo te kowhiringa o te BMS. Tae atu ki te utu o naianei me te tuku o naianei, ia tonu, te tere o te manawa, take.
Ma tenei anake ka taea te kowhiri i te BMS rite. Hei tauira, ko te naianei tonu o te 20A ka hiahiatia he ngongo MOS o 4pcs, a ka taea te whakamahi i te ngongo MOS me te iti o te aukati o roto me te 3pcs. Mo te utu me te tuku iahiko, me wehe te maha o nga ngongo MOS.
NO.4 Whakapumautia mehemea kua wehea te tauranga putanga, he rite ranei
Ko te aratau atanga o te taputapu waea kawenga, te aratau putanga o te tauranga wehe, taua tauranga ranei, he mea nui ake hoki mo te kete pākahiko.
Ki te whakaaro me utu te 10A me te tuku i te 50A, ka taea e koe te whiriwhiri i tetahi BMS me nga tauranga motuhake, ka iti ake te utu me te iti ake te rahi i te whakamahi tika i te 50A BMS me te tauranga kotahi.
NO.5 Te kowhiringa rahi o te BMS
E ai ki te hoahoa hanganga o te putea pākahiko lithium, Me whiriwhiri e koe te rahi o te BMS kia rite ki te whakatika i roto, Me whai whakaaro ano koe mehemea he mea tika ki te whakawhanake i tetahi rahi motuhake, BMS whakauru.
NO.6 Whakapumautia mehemea e tika ana kia whai korero
Kei roto ko IIC SMBUS RS485 RS23 CAN UART LIN me etahi atu. He ihirangi kawa korero motuhake, me whakarite ano he BMS motuhake.
NO.7 Ka hiahiatia etahi atu mahi
Hei tauira, ahakoa e hiahia ana koe ki tetahi kōwae here onāianei, mahi whakaōrite, mahi i mua i te utu, take.
Mena kei te ruarua tonu koe me pehea te whiriwhiri i te BMS tika mo to kete pākahiko lithium DIY, nau mai haere mai whakapā mai waiho mai ranei nga korero i raro nei.
