BMW I01 Product Information page 82

I01￿High-voltage￿Components
5.￿High-voltage￿Battery￿Unit
Index
1
2
3
4
5
6
7
8
9
5.2.￿External￿features
5.2.1.￿Mechanical￿interfaces
The￿housing￿of￿the￿high-voltage￿battery￿unit￿is￿connected￿mechanically￿to￿the￿Drive￿module￿of￿the
I01￿using￿a￿total￿of￿26￿screws.￿This￿way￿the￿weight￿and￿the￿acceleration￿forces￿occurring￿during￿the
journey￿are￿supported￿at￿the￿body.￿The￿mounting￿bolts￿are￿accessible￿directly￿from￿below,￿without
having￿to￿first￿disassemble￿the￿underbody￿paneling￿.￿For￿the￿removal￿of￿the￿high-voltage￿battery
unit￿firstly￿all￿preliminary￿work￿specified￿in￿the￿repair￿instructions￿(diagnosis,￿disconnecting￿from￿the
power￿supply,￿etc.)￿has￿to￿be￿performed.￿Before￿the￿mounting￿bolts￿are￿slackened￿the￿special￿tool￿for
lowering￿(mobile￿table￿lift￿MHT 1200)￿must￿be￿positioned￿below￿the￿high-voltage￿battery￿unit.
The￿electrical￿connection￿is￿established￿between￿the￿housing￿and￿Drive￿module￿by￿another￿potential
compensation￿screw.
The￿low￿resistance￿connection￿between￿the￿housing￿of￿the￿high-voltage￿battery￿unit￿and￿ground￿(=
Drive￿module)￿is￿a￿crucial￿prerequisite￿for￿the￿fault-free￿function￿of￿the￿automatic￿isolation￿monitoring.
This￿is￿why￿it￿is￿important￿to￿ensure￿the￿correct￿tightening￿torque￿is￿applied￿for￿this￿potential
compensation￿screw.
It￿is￿also￿important￿to￿ensure￿that￿neither￿the￿housing￿of￿the￿high-voltage￿battery￿unit￿nor￿the￿Drive
module￿at￿the￿respective￿bore￿holes￿is￿painted,￿corroded￿or￿dirty.￿The￿bare￿metal￿must￿be￿exposed￿if
necessary￿before￿the￿potential￿compensation￿screw￿is￿mounted.
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Explanation
Electric￿heating￿(EH)
High-voltage￿battery￿unit
Battery￿management￿electronics￿(SME)
Electrical￿machine
Range￿Extender￿Electrical￿Machine￿Electronics￿(REME)
Convenience￿charging￿electronics￿(KLE)
Charging￿socket￿at￿the￿vehicle
Electrical￿machine￿electronics￿(EME)
EKK