Ac to dc low voltage high current

[teoman]

I think that you should somehow find the specs for the battery pack.

Can you see the cells in the pack?

[TimV]

The battery is closed.

[teoman]

Do you have any access to the High voltage terminals?

If you want to fiddle with high voltage that is.

[teoman]

Maybe something like this:
Look what I found on AliExpress
DC DC 8~32V to 45~390V Adjustable High Voltage Boost Converter ZVS Step up Booster Module Capacitor Charge Board New Arrival-in Integrated Circuits from Electronic Components & Supplies on Aliexpress.com | Alibaba Group

(This one is only 200mA output)

To directly feed the pack.

With a half full pack, you should not have any balancing issues. And you can assemble your cells to low voltage configurations.

[TimV]

The orange wiring are the high voltage cables. The only problem is that there are way to many cables running from the battery to ... that i have no idea what the main voltage cables are... Thats something i want to know.

[HaroldinCR]

Just an assumption that you are questioning the Volvo hybrid in this thread ?

The voltage is 400. If you can locate the inverter that drives the motor, that will show the HV cables.

About the extra cells that you want to solder together, if this is what you mean, I would vote against soldering and get a resistance welder that spot welds nickle strips to the cells, quickly, without heating the cells, which will have very detrimental effects on the cells.

If you are not sure about the inverter location, respond here and I will do some research for that location. I will also try to find a printout of the cables exiting the battery for the Volvo hybrid ? Does this image help you ?

https://commons.wikimedia.org/wiki/F...nd_battery.jpg

[oldtamiyaphile]

If you stop charging at 14.6v (~80%), your lithium batteries will last longer.

Second vote for NOT soldering batteries!

[teoman]

http://youtu.be/o1NFbchHeM8


Diy spot welder.

[TimV]

That spot welder looks super easy. In fact, i have all the stuf laying around to make one myself.

The only problem i see, what if one cell fails? It shorts all the parallel cels with it.

Ive opend a lot of electical bike batteries with shortet out cells because of a single failed cell. That is only 500Wh. But when i have 1200+ cells ... That is 11 000Wh

More then enough to start a big fire...

[TimV]

Originally Posted by HaroldinCR

Just an assumption that you are questioning the Volvo hybrid in this thread ?

The voltage is 400. If you can locate the inverter that drives the motor, that will show the HV cables.

About the extra cells that you want to solder together, if this is what you mean, I would vote against soldering and get a resistance welder that spot welds nickle strips to the cells, quickly, without heating the cells, which will have very detrimental effects on the cells.

If you are not sure about the inverter location, respond here and I will do some research for that location. I will also try to find a printout of the cables exiting the battery for the Volvo hybrid ? Does this image help you ?

https://commons.wikimedia.org/wiki/F...nd_battery.jpg

Ive had my trunk dismanteld to the level of the pics ive posted. So far i did not had enough evidence to point out the main leads. I have filmed it and hope to upload it tomorrow.

This here is pioneerwork. This is never been done before. So not an easy task.

Hope it will work out.
Going to contact Volvo to hopefully get some help.