[Skupik]

Hi

I’v managed to salvage some Tier Okai 400B external batteries.
Those are 47V 14.7Ah/690Wh batteries.
Made out of Samsung’s INR21700-50e cells in 13s config.
Battery itself is quite heavy, with big aluminium casing having a handle and a display on top -showing SOC%, battery Voltage and temperature.

On the top there is only a bunch of small cables connected to the LCD itself.


On the bottom - we got MR60-M connector with common „+” and two grounding ports - one for load, and second for charging. Also a 5-pin communication connector.


Everything held together with bunch of Torx security T10 screws. Very well waterproofed with two gaskets and extreme amounts of conformal coating silicone paste.


It’d be really hard to get the battery out from the case (because of the silicone) and access to the BMS, but I’ll try.

More pics will follow.
If anyone know how to wake the battery up using built-in BMS - please PM me.

[satann]

how many volts u measure? i only get 24 v on mine eventho it says 97% charged why?

[Jesus]

wow you're quite lucky to have these.
Can you confirm that the internal battery and the swappable battery are the same?

Thanks

Hi

I’v managed to salvage some Tier Okai 400B external batteries.
Those are 47V 14.7Ah/690Wh batteries.
Made out of Samsung’s INR21700-50e cells in 13s config.
Battery itself is quite heavy, with big aluminium casing having a handle and a display on top -showing SOC%, battery Voltage and temperature.

On the top there is only a bunch of small cables connected to the LCD itself.


On the bottom - we got MR60-M connector with common „+” and two grounding ports - one for load, and second for charging. Also a 5-pin communication connector.


Everything held together with bunch of Torx security T10 screws. Very well waterproofed with two gaskets and extreme amounts of conformal coating silicone paste.


It’d be really hard to get the battery out from the case (because of the silicone) and access to the BMS, but I’ll try.

More pics will follow.
If anyone know how to wake the battery up using built-in BMS - please PM me.

[baubabauu]

Tried to push cells ouț and this happened


I am waiting for other way to work the battery.
It runs into protection after a few seconds

[ivymetro]

Angle grinder dude.

[iddik75014]

Hi Skupik,

Are you showing on your pictures that battery ?

I have that one but I don't know how to take it off from the scooter :



Could you please tell me how to proceed for extraction of the battery ?

Hi

I’v managed to salvage some Tier Okai 400B external batteries.
Those are 47V 14.7Ah/690Wh batteries.
Made out of Samsung’s INR21700-50e cells in 13s config.
Battery itself is quite heavy, with big aluminium casing having a handle and a display on top -showing SOC%, battery Voltage and temperature.

On the top there is only a bunch of small cables connected to the LCD itself.


On the bottom - we got MR60-M connector with common „+” and two grounding ports - one for load, and second for charging. Also a 5-pin communication connector.


Everything held together with bunch of Torx security T10 screws. Very well waterproofed with two gaskets and extreme amounts of conformal coating silicone paste.


It’d be really hard to get the battery out from the case (because of the silicone) and access to the BMS, but I’ll try.

More pics will follow.
If anyone know how to wake the battery up using built-in BMS - please PM me.

[baubabauu]

Search for okai es400 v4 forum and there are the explanations for removing the battery

[feaoafhzap]

Deleted

[STO]

I have 15pices of the okai es 400b battery

I like to build a powerwall and use the battery s

But I dont like to rip them apart

Is there some communication I need or tldid they stay on all the time?

[Marius Petz]

To charge the battery there are 4 pins. There are 2 rows with 7 ports for pins in a row. in the first row it's pin 5 & 7. in the second row it's pin 1 & 3