Recreating battery pack

[hak4fun]

I need to recreate a 8.4v 7 cell battery pack. Basically this: http://www.ebay.com/itm/8-4V-1000mAh-Ni-MH-Rechargeable-Battery-7-Cells-For-HobbyZone-RC-Plane-Car-Boat-/151355768317?hash=item233d81bdfd:g:274AAOSw7I5Tw5-r

 

I am not sure how I would go about wiring that up... Can someone give me alittle help?

[Huntsman]

Why would you want to do it yourself? Do you already have the cells? 

 

Assuming you do, you will need either a high power soldering iron or spot welder. Also some aluminium/zinc strips for connections. Then 8.4V 7 cells should be all 7 cells connected in series, assuming your cells are 1.2V.

 

If you ask me, not worth the trouble unless you already have the materials and tools ready.

[hak4fun]

17 hours ago, Huntsman said:

Why would you want to do it yourself? Do you already have the cells? 

 

Assuming you do, you will need either a high power soldering iron or spot welder. Also some aluminium/zinc strips for connections. Then 8.4V 7 cells should be all 7 cells connected in series, assuming your cells are 1.2V.

 

If you ask me, not worth the trouble unless you already have the materials and tools ready.

I have the tools required, I have done this before with a different pack. I just wanted to make sure I understood how this specific pack was put together.

 

I can buy the cells for $5, and build the packs myself and save $7 per pack Thats quite abit of money sense I need somewhere around 6 battery packs so I can do continous flight.

[PineappleHolidays]

1 hour ago, hak4fun said:

I have the tools required, I have done this before with a different pack. I just wanted to make sure I understood how this specific pack was put together.

 

I can buy the cells for $5, and build the packs myself and save $7 per pack Thats quite abit of money sense I need somewhere around 6 battery packs so I can do continous flight.

But wouldn't li ion be better then ?

[W-L]

On 6/2/2016 at 1:07 PM, hak4fun said:

I need to recreate a 8.4v 7 cell battery pack. Basically this: http://www.ebay.com/itm/8-4V-1000mAh-Ni-MH-Rechargeable-Battery-7-Cells-For-HobbyZone-RC-Plane-Car-Boat-/151355768317?hash=item233d81bdfd:g:274AAOSw7I5Tw5-r

 

I am not sure how I would go about wiring that up... Can someone give me alittle help?

Ni-MH are a nominal 1.2V batteries so the 7 batteries would be wired in series to give a total 8.4V

[hak4fun]

3 hours ago, Mihemine said:

But wouldn't li ion be better then ?

I guess if I wanted to change my whole ecosystem. Almost all my RC stuff runs on Nimh. Don't want to invest in a new battery type right now.

[hak4fun]

3 hours ago, Mihemine said:

But wouldn't li ion be better then ?

I guess if I wanted to change my whole ecosystem. Almost all my RC stuff runs on Nimh. Don't want to invest in a new battery type right now.

[Huntsman]

But NiMH is not efficient in terms of power to weight ratio. LiPo would fare better in that regard. Also be sure to balance charge the cells if you put them in series like that.

[hak4fun]

On 6/3/2016 at 11:44 PM, Huntsman said:

But NiMH is not efficient in terms of power to weight ratio. LiPo would fare better in that regard. Also be sure to balance charge the cells if you put them in series like that.

This is true. but... I have already invested in Ni-MH. I do plan to switch to liPO, just not right now. I want to do it all at once.