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esc1-overview

M365 Classic/Pro ECU [ESC1]

ECU used in Xiaomi m365 and m365 pro

Version history

1.3 and lower – ST14xxx or mixed, U4 TPS54160
1.4 – ST15810
1.5 – some boards now feature NCEP85T14, tinned B+
2.1 – major overhaul, NCEP85T14, tinned traces, U4 SY8502 (up to 85V), PRO only
3.0 – same as 2.1 with reinforced traces from factory, and no PCB markings, PRO only

Specification

FETs used: ST14810, ST15810, NCEP85T14, NCE8596A (clone only)
Driver: MT8006A
Input capacitance: 63V 1000uF, 63V 33uF, 100V 100nF

Connectors

  • Interface
    • PAP03-V [B038-PASK] – BMS, rear light
    • PAP05-V [B058-PASK] – Motor halls
    • PAP04-V [B048-PASK] – BLE
  • Power
    • Amass XT-30 PCB Female – Battery input
  • Motor
    • 4.8/6.3 L-Shaped spring terminal - C/B/A phase connector

Resources

Known issues / modification ideas

  • TPS54160 [1.5 and below] only accepts 56V safely, for more input voltage, trace cut method must be implemented, see here
  • SY8502 [2.1 and above] accepts up to 85V input, 65V safely
  • TO220 MOSFET packages are poorly thermally connected to the case, see here for possible improvements
  • B+ rail has poor electrical conductivity, see here for a fix
  • Phase connectors are known to be improperly crimped, it’s advisable to solder wires directly and attach MT30 or MT60 for better contact
  • Excessive braking current can burn MOSFET packages, due to active brake implementation

Photos

1.4/1.5
cloud.scooterhacking.org_tidings_wiki_esc1_photos_15_front.jpg

cloud.scooterhacking.org_tidings_wiki_esc1_photos_15_back.jpg

cloud.scooterhacking.org_tidings_wiki_esc1_photos_14_back.jpg

2.1/3.0

cloud.scooterhacking.org_tidings_wiki_esc1_photos_21_real_front.jpg

cloud.scooterhacking.org_tidings_wiki_esc1_photos_30_front.jpg

cloud.scooterhacking.org_tidings_wiki_esc1_photos_30_back.jpg

Thanks goes to Topol for providing the above pictures.

esc1-overview.txt · Last modified: 2021/06/23 07:59 by tidings