Lithium battery ni hta cell ni hpe balancing galaw ai lam gaw hpa rai ta?- Polinovel

Ngai gaw battery pack hpe 12 ning daram galaw ai. Marai langai ngai ngai hpe "balancing galaw ai gaw hpa galaw ai kun?", ngu san shagu sumla lahkawng hpe sha madun dan ai: langai gaw 2-old 36 V e-bike pack hpe rap ra ai lam n nga ai (1.8 V hta cell ni a daw mi, ngam ai 4.18 V hta ngam ai ni), kaga langai gaw 100 mA passive balance hte maren sha rai nga ai (3 ning na ai hpang 12 mV kata kaw nga ai cell ni yawng) langai sha rai nga ai. Dai gaw sumla langai hta lawm ai lam yawng rai nga ai.

Tengman ai pack ni hta, cell ni gaw galoi mung maren sha n shangai ai. 100 brand- Samsung 50E cells hpe tray langai kaw na la u: n-gun garan ai lam gaw ±30 mAh, self{5}} n-gun shayawm ai lam 2–3 lang shai hkat chye ai, kata lam hpe ninghkap lu ai atsam gaw 3–5 mΩ n bung chye ai. 200 cycle ngut ai hpang gawng kya ai ni gaw grau nna hpang hkrat mat ai. Balancing n galaw ai sha, pack capacity hpe charge ntsa na n-gun kya dik htum cell hte n-gun ja dik htum cell ni hpe dictate galaw ai. Shawng ningnan shaning hta sha 20–40 % lang mai ai atsam hpe nang sum mat ai.

Active Cell Balancing

Hpaga lam hta masha ni teng sha rap ra ai lam lahkawng sha nga ai:

Ndai gaw 20 kWh npu na pack ni hta 95 % lang ai.
Board ni hta mu lu na re ai chips ni:

TI BQ7699x2 / BQ769x3 / BQ78z100000

Analog arung arai ni LTC6804 / LTC68113813

Maxim MAX14920 / MAX14921

NXP MC337771 / MC33772

Typical bleed current: 80–150 mA (BQ76952 gaw pin lahkawng hpe parallel galaw yang 220 mA hpe shadut lu ai).
Masha law law hpe shapraw ai hta manu dan ai lam: galoi mung 27 Ω (sh) 33 Ω 2512 1 W package.
Trigger settings hpe ngai teng sha lang ai:
CV aten hta 15–25 mV hta sai pru hpang u, delta 6–8 mV npu de hkrat mat ai shaloi jahkring kau u.
mV 2 mV hpe hkan shachyut na matu shakut yang board hpe htani htana shadu na re.

Katsi ai gaw tengman ai manghkang re. 100 mA sai pru ai 16s scooter pack gaw BMS PCB ntsa de 7–8 W hpe dingyang kabai bang kau lu ai. Dai majaw, manu n-htuk ai ni 20-dillar e-bike board ni gaw jan hta hka lum ai hpang, warp hte crack byin ai.

Kalang mi ~30 kWh jan sa ai shaloi yawng ngu na daram gaw active de galai mat wa ai.

Tengman ai-nag ga ni hpe ngai myit daw myit hten ai lam ni hpe tsun dan ai:

Tesla Model S/X (2012–2021): HVJB ntsa na DC{2}}DC nlung kaji ni, ~1 module langai hta

BMW i3 (shaning ting): inductive transformer module, 24 hte1 ratio, 2 A .

BYD Blade packs: Infineon TLF35568 hpe madung tawn nna nbungli jawn ai board ni

Miwa n shamu n shamawt ai shingbyi shara ni: garan ginhka da ai DC{0}}DC modules ni gaw 15–20 A shamu shamawt nga ai 700 V string ting hta 15–20

Off{0}}{1}}}mung masa gaw masha ni teng sha mari ai:

Karum shingtau lam / Orion BMS Gen4 / REC Q / Dilithium: 5–8 A n-gun rawng ai katsi ai hte rau

Cell Balancing

OEM law malawng gaw SoC a ntsa 10–15 % hta sha rap ra ai, hpa majaw nga yang voltage curve gaw 3.45 V (NMC) shing nrai 3.40 V (LFP) a lawu de grai n-gun n rawng ai majaw re.
Tesla waits until >90 % SoC hte hpang jahtum na 30–60 min na charge hpe balancing galaw ai.
Ngai a 2017 BMW i3 log ni hta, inductive balancer gaw > 30 mV delta hte current < 5 A hpe pack galaw ai shaloi sha rawt wa ai hpe madun ai.

Ngai hta 2016–2018 npu na low{2}}}speed EV packs ni hte hpring ai drawer langai mi nga ai, dai gaw Miwa mungdan kaw na sai pru ai resistors ni hpe yeng seng kau nna $0.80 hpe hkye la lu ai. Shata 18 na ai hpang, n-gun kya ai cell ni gaw, hka pru ai shaloi, n kaja ai hku sa wa ai, magri ni htum mat ai, dendrites ni kaba wa ai, garan ginhka ai hka lim mat ai, wan hkru mat ai. Ngai gaw shata 14 laman 8–9 Ah de 8–9 Ah de hkrat mat ai hpe yu yu sai. Shanhte a ntsa $12 active balancer hpe slap galaw nna 18–19 Ah de bai du wa ai. Sharin la lu ai lam gaw yak hkak ai lam hpe sharin la wa ai.

kWh → passive npu hta kaja ai hte htani htana nga na re (scooter, power tools, drone)

400 V+ or >50 kWh → active n rai yang shaning shagu modules ni hpe galai na re

Dai ni dut shabra ai hkrak ai EV langai hpra gaw rap ra ai lam nga ai. Va resistor (sh) $300 active board re ai kun ngu ai hpe galai shai ai lam langai sha nga ai.

Dai gaw cell balancing re. Hpa mung mau hpa lam n nga ai. Kaja ai cell ni hpe grau lawan ai hku asak galu na matu dawdan ai lazy kanau langai mi a n-gun n rawng hkra pat kau ai sha re.

Cell Balancing