Thoughts on using a 52V pack with the Tongsheng TSD08Z motor

[Bonwit]

I’m wanting to run my TSD08Z with my existing 52V pack. It’s my understanding, however, that the controller’s firmware will trigger an error code when it sees this higher voltage, even though the motor is said to (generally) be able to handle the additional 4 volts. While I know the cell count can be changed using OSF, I’m actually otherwise quite happy with the factory firmware and don’t want to go down that rabbit hole. I'm thinking a solution would be to wire a string of six 1N4007 diodes in series with the white Switched Battery return wire from the display to fool the controller into seeing 54.6 volts, thus avoiding an error code. Has anyone experienced any issues running this motor with 52 volts? Obviously, I’d want to take it easy on the power until the pack drained down to something below 54.6, but I like this solution better than limiting my pack charge or introducing inefficiencies by using big diodes to limit the actual battery voltage.

 

[n00b]

Idk what that motor is.
A lot of Tongshengs can be hacked.

 

[Bonwit]

The TSD08Z is Tongsheng’s improved version of the TSD02B. Stronger and much better heat dissipation, decent factory firmware and, of course, torque sensing. I’m loving it, and planning to replace my Bafang BBSHD with another one.

 

[n00b]

The TSD08Z is Tongsheng’s improved version of the TSD02B. Stronger and much better heat dissipation, decent factory firmware and, of course, torque sensing. I’m loving it, and planning to replace my Bafang BBSHD with another one.

So what is the TSDZ8?
I think you can flash the firmware on that, the hardware will definitely support 52v.
You'll have to buy a USB dongle.
It takes some computer savviness.
I'm sure there's 52v hacked firmware ready to go somewhere.
You may not have to do anything. It's only 4 more volts.
Your inline diode thing could work, but what about when the battery gets down to 54.6?

 

[E-HP]

The TSD08Z is Tongsheng’s improved version of the TSD02B. Stronger and much better heat dissipation, decent factory firmware and, of course, torque sensing. I’m loving it, and planning to replace my Bafang BBSHD with another one.

Never heard of your motor, but have my Tsdz8 running on 52v. I’m using the EKD01 display. Can you post a pic of your motor and display?

 

[n00b]

Never heard of your motor, but have my Tsdz8 running on 52v. I’m using the EKD01 display. Can you post a pic of your motor and display?

Did you have to flash anything?

 

[E-HP]

Did you have to flash anything?

I’m running the latest non-OSF firmware from the tongsheng Facebook group. But, it’s an option in the EKD01 display available when running the original firmware as well.

 

[n00b]

I’m running the latest non-OSF firmware from the tongsheng Facebook group. But, it’s an option in the EKD01 display available when running the original firmware as well.
View attachment 384080

Someday I'll get mine running. Looking for the right bike now.

 

[Bonwit]

Never heard of your motor, but have my Tsdz8 running on 52v. I’m using the EKD01 display. Can you post a pic of your motor and display?

Yeah, I miss-wrote that. It's the TSDZ8

 

[Bonwit]

I’m running the latest non-OSF firmware from the tongsheng Facebook group. But, it’s an option in the EKD01 display available when running the original firmware as well.
View attachment 384080

I'd like to know more about the "official" Tongsheng firmware. Does it allow you to change the cell count? Changing it on the EKD01 display probably won't work, as this limit is hard coded in the controller. To the best of my knowledge, changing it on the display only affects the "battery remaining" gas gauge on the display, but I'd like to be proven wrong.

 

[E-HP]

I'd like to know more about the "official" Tongsheng firmware. Does it allow you to change the cell count? Changing it on the EKD01 display probably won't work, as this limit is hard coded in the controller. To the best of my knowledge, changing it on the display only affects the "battery remaining" gas gauge on the display, but I'd like to be proven wrong.

It works, but I feel no desire to prove you wrong.

 

[Bonwit]

It works, but I feel no desire to prove you wrong.

Well, that's encouraging (I guess). I'll certainly give it a try before I cut into the display cable.

 

[Bonwit]

I’m running the latest non-OSF firmware from the tongsheng Facebook group. But, it’s an option in the EKD01 display available when running the original firmware as well.
View attachment 384080

I see there are several Tongsheng FB Groups. Do you happen to have a link to the firmware file?

 

[E-HP]

Well, that's encouraging (I guess). I'll certainly give it a try before I cut into the display cable.

Not sure why you would cut into the display cable.
These guys sell the TSDZ8. Check the 4th battery option (52V 20Ah). You can send them an email and ask them what the heck they think they're doing.

Varstrom 48V 750W TSDZ8 with Torque Sensor | 140Nm TongSheng Mid Drive Motor | E-Bike Conversion Kits

The TSDZ8 support more than 10 minutes of climbing riding. On the float road its maximum speed can reach 55km/h.

varstrom.com

 

[E-HP]

I see there are several Tongsheng FB Groups. Do you happen to have a link to the firmware file?

There are instructions and links here, plus the hardware can be purchased as well. You might find the hardware on eBay or aliexpress cheaper, but you have to be careful on the versions. Good luck.

TSDZ8 firmware update using J-Link JLink v9 programming kit

ebikestuff.eu

In case you decide to go OSF after already investing the money on the hardware:

TSDZ8 OSF (open source firmware)

I propose to discuss in this thread all the questions/issues about the open source firmware for TSDZ8 motor. Initially the first posts about this OSF firmware have been put in another thread ( e.g. new tsdz8 pswpower ) but I realized that it can be confusing to know if a post is related to the...

endless-sphere.com