A pair of these packs came fitted to a non-running electric moped I purchased on a bit of a whim, I found very little information regarding these packs online so I decide to do a bit of investigation myself.
They are CANBUS controlled with internal breakers so there is zero output from the pack without the start-up messages to close the breakers.
Numbers on the Pack:
1 040 000 045
1100008907
85513
| Nominal Voltage | 46.8v |
| Nominal Capacity | 50.3Ah |
| Nominal Energy | 2387Wh |
| Max. Operating Voltage | 54v |
| Max. Charging Current | 20A |
| Max. Discharge Current | 120A |
The construction is the fairly common method with the 18650 cells being housed in a plastic carrier (in a 16s15p configuration) that is slid into an aluminium case with the BMS (and contactor in this instance) being part of the top/end cover (interestingly the main positive and negative outputs run down the side of the pack as flat nickel conductors with insulation on the outside so they don’t short out on the aluminium body).
Once all of the bolts are removed and the bottom cover has been withdrawn with enough force the pack can be pushed from the bottom out through the top.
If the pack has dropped below critical voltage it will not wake up and as such you cannot charge it but there is a way to “jump start” the pack directly without dismantling it.
It sounds crazy but if you drill a shallow 4mm hole in the position on the yellow “cross” below you’ll be right above the “hot” side of the (positive) contactor where you will be able to use a probe or a screw to touch the contactor input terminal which allows you measure the actual voltage of the pack and charge it directly if required.
