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In order to improve and take full control of the battery on the Super Soco TC Max I'll try to build a new upgraded one. I think I can improve range around 25% by using 18650 cells. First thing to do is gather the parts and plan out how to arrange the 18650's. Some cell holders are obtained from AliExpress.

 

TC Max Battery Compartment

 

These cell holders are designed for 80 18650 cells. They will form a 16 parallel, 5 series module. There will be four modules stacked and connected in series making up a 16 parallel, 20 series battery pack with 320 cells total. I spent some time trying different cell holders in different arrangements. These ones cram the most cells in whilst maintaining an easy shape to work with. The holes between cells can accept a 4mm fibreglass rod to stop the modules moving around.

 

TC Max 18650 Battery Module

 

The new pack looks like it will be a good bit smaller than the original. Weight should also be considerably less. I've found some good quality 3500mAh cells which will make the entire pack 56Ah. A good upgrade from the original 45Ah battery.

 

TC Max Battery 18650

 

In order to maintain the cells within set parameters a BMS must be used. This Ant BMS seems to have plenty of cool features and spec including bluetooth programming and data acquisition. The temperature sensors are a bit big to fit between cells so I'll look for an alternative. The TC Max should pull around 70 Amps peak so the 100 Amp specification of this unit is fine.

 

Super Soco TC Max BMS

 

This additional communication module should allow the bikes original battery meter to work.

 

Super Soco Communication Module

 

Once the small holes in the cell holders are drilled clear with a 4mm drill bit, fibreglass rods can be inserted. These will help to maintain the structure of the battery and hold the PTFE separators in place. 

 

Super Soco DIY Battery

 

1mm PTFE sheets are cut down to size and drilled to allow the fibreglass rods to pass through. PTFE has a high melting point so should remain intact even if high temperatures occur. It will insulate the modules from each other to prevent short circuit.

 

Super Soco Rebuild Battery

 

320 LG MJ1 cells are purchased and assembled into modules. The LG cells are rated at 3500mAh and maximum discharge current of 10A. The bike should pull just over 4A per cell so well within specification.

 

 

Two layers of 0.2mm pure nickel sheet are welded using a K-Weld welder. Extra tabs are left on the sides to allow the modules series connections and BMS cell connections.

 

 

 

 

These battery sockets are available online. They seem to be good quality and will allow the use of the original plug on the bike.

 

Super Soco TC Max Battery Connector

 

Super Soco TC Max Battery Connector

 

The BMS has built in bluetooth to allow programming and monitoring of cell voltages. To make it possible to check the pack and cell voltages without the use of a phone, a screen will be added to the battery. This unit should display total voltage, individual cell voltages and current both in and out of the battery. I believe it will also allow the BMS to be turned on and of or reset.

 

Super Soco TC Max Ant BMS Screen

 

To be continued as I gather more parts...

 

 

 

 

 

 

 

 

 

Comments  

# Arpad 2022-07-10 11:23
Hi Tim,

This battery looks amazing, also the quality of work you put on in looks great.

Would you consider making one more for sale?

I'm getting my TC max soon, and would like a bigger battery, but unfortunately my electrical/elec tronics skills are close to 0.

Thanks,
Arpad
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# Tim 2022-07-28 12:45
Hi Arpad,
Thanks but sorry I can't make you one. The standard battery should give you good range.
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# Kai 2022-06-30 10:44
Hi Tim,
Thanks for sharing this upgrade.
Planning to buy a TC max but the range for one way is just not sufficient for my commute (since i live uphill from my work). In your opinion, would it be possible to connect such a pack in parallel to increase range. The pack could be mounted in a saddle pack...
Cheers
Kai
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# Tim 2022-07-03 03:52
Hi Kai,
Yes you could connect in parallel. You would need to make sure the voltage of each pack was the same before connection. I would say a pack about half the size of this pack might fit on the back.
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# tourp 2022-06-16 19:01
Hey, awesome build! I would like to build a 72v battery with the most amps possible with 300 cells. So i believe it should be a 20s15p battery pack. I also have the cells holders. How should i do it ? thanks!
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# Tim 2022-07-03 23:25
Hi, 20s 15p should give you good current. What cells are you using?
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# Paul 2022-06-04 14:03
Hi mate, Your Blog on this subject is excellent, I would have loved more detail, but have a question or two :

1, the control board (I see it's offered for sale with the BMS) would it be the same one for CPX, or would I enquire better with the supplier ?

2, the control board is installed inside the battery case ?

3, is there a fuse also installed ?

thanks
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# Tim 2022-07-03 23:27
Hi, which control board?
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# Jesus 2022-05-28 15:07
Hi Tim,

I want to build the biggest energy battery pack that fits in the motorcycle´s battery pack compartment.

We begin by battery pack´s height. I think that it could consists in six modules stacked (six modules * 65 mm per module = 390 mm). I imagine that we would have to remothe the storage tray. Do you think that this is posible?

Six modules * 80 cells per module = 480 cells (3,6 V * 3,5 Ah = 12,6 Wh)

480 cells * 12,6 Wh per cell = 6,048 kWh

Thanks in advance
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# Tim 2022-05-29 17:01
I think doing 5 high might fit but might not. 6 definitely not. I've added a few pictures to show space with 1 extra cell height.
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# Jesus 2022-06-01 12:17
Hi im,

Thank you so much for the pictures and for your time.

At the fourth picture of your blog, we can see your four-modules battery pack next to the TC Max´s battery pack original case.

According to that picture, I think that we could add an additional module to your four-modules battery pack (in total five modules) and we would have a similar height to the TC Max´s battery pack original case.

The height of the TC Max´s battery pack original case is 321 mm. The height of five modules stacked is 325 mm (five modules * 65 mm per module = 325 mm).

We have a similar height in both cases.

Am I wrong about something?

Thanks in advance.
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# Tim 2022-07-03 23:37
I have about 1.5cm of foam under the battery in the pictures. So 5 should most likely fit. Let me know how you get on.
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# Andras 2022-04-27 16:34
Hi mate,

this project is really cool, congrat! I have a TC Max and I want to copy your battery pack :) Your youtube video contains almost every detail, I have two missing things: the alternative heat sensors and the battery case. can you give me some hints (maybe links ;) )

thanks!!!!
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# Tim 2022-04-28 17:33
Hi Andras,

The heat sensors are standard thermistors. I used Vishay ones I got off ebay. Manufacturer code NTCLE300E3103SB . The top and bottom covers are made from 9mm polypropylene also purchased from ebay... https://www.ebay.co.uk/itm/361824620070?var=631087054490. The outer cover was 0.8mm polypropylene sheet... https://www.ebay.co.uk/itm/224642170534. If you're ordering the other parts from AliExpress please use my links. Thanks. Be careful. Good luck!
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# palmag999@gmail.com 2022-04-15 16:02
quando costa ricostruire una batteria per super soco tc max da 72 v
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# Tim 2022-04-15 16:07
£1700
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