Equalisation charging

[Dan Sun]

before this MG EZS, I had another electrical car. it used Lithium iron phosphate battery，and very often it will lost some capacity and I have to send it to the service center for equalisation charging.
MG EZS used ternary lithium ion battery, it is much better than Lithium iron phosphate battery since it is naturally more center distributed of individual cell voltage. it is a reason why I select MG EZS rather than a BYD car, which promised life long free service on its Lithium iron phosphate battery.

within the electrical car, there are hundreds or thousands of battery cells, the service guy will wire each individual cells for charging, this is what I understood how the equalisation charging is working. it is a very time/labour consuming process and therefore very expensive.

but when I read the manual of MG ZS EV, I found AC slow charging will conduct the equalisation charging at end of the charging process. I wonder if someone know if that is real case? how come MG can implement such complicate wiring to conduct the equalisation charge?
it was conduct on the cell level? or only equalisation charge on the packs of the battery cells?

 

[Lovemyev]

but when I read the manual of MG ZS EV, I found AC slow charging will conduct the equalisation charging at end of the charging process. I wonder if someone know if that is real case?

Yes - This is correct.
MG recommend a balance cycle to be carried out on a A/C charger, once a month.

 

[Kithmo]

As I understand it, the cells are arranged in blocks and it's these individual blocks of cells that are monitored and individually charged whilst balancing. So the wiring is not really complicated, it's just a loom of very small wires with tappings off for each block.

 

[JodyS21]

before this MG EZS, I had another electrical car. it used Lithium iron phosphate battery，and very often it will lost some capacity and I have to send it to the service center for equalisation charging.
MG EZS used ternary lithium ion battery, it is much better than Lithium iron phosphate battery since it is naturally more center distributed of individual cell voltage. it is a reason why I select MG EZS rather than a BYD car, which promised life long free service on its Lithium iron phosphate battery.

within the electrical car, there are hundreds or thousands of battery cells, the service guy will wire each individual cells for charging, this is what I understood how the equalisation charging is working. it is a very time/labour consuming process and therefore very expensive.

but when I read the manual of MG ZS EV, I found AC slow charging will conduct the equalisation charging at end of the charging process. I wonder if someone know if that is real case? how come MG can implement such complicate wiring to conduct the equalisation charge?
it was conduct on the cell level? or only equalisation charge on the packs of the battery cells?

I thought all electric cars did equalisation charges, indeed I thought it needed to be done too frequently for it to be done at service times.

There's "only" 108 cells in the ZS, so not that many really, easy enough to wire each up for equalising.