Patch lead for BOSCH batteries

Edruid

New Member
Hi ebikers,
Newbie here, thanks for having me on.
I want to make a patch lead to plug rack-mounted batteries into my BOSCH GEN4 performance line CX motor.
Stands to reason if you get one male and one female plug on a lead you can use that to plug in
Maybe use different / cheaper format batteries (than £££$$$powertubes).
Anyone done this?
Anyone know where to get the plugs/sockets?
Cheers
edruid
 

fooferdoggie

Well-Known Member
its not goinjg to happen. the batteries and motor all talk to each other. you cant even add in another bosch battery to a bike without having a manufacturer level flash dongle to update the motor.
 

Alaskan

Well-Known Member
I have owned 5 Bosch powered bikes. I am a capable mechanic and electrician and do much of my bike work. However when it comes to Bosch stuff, I always defer to a Bosch authorized shop to do the work.

Bosch's motors and batteries have a well earned reputation for being rock solid and reliable. The price of their gear reflects that reputation. They are not a bargain basement or do it yourself company. Bosch is also known to stand behind their products beyond the written warranty period on occasion. I would not do anything that would jeopardize this.

What you are proposing will definitely void your warranty. Plus Bosch has wiring harnesses and mounts that could accomplish what you want. Full integration of a second battery requires Bosch service equipment and software to complete and integrate with the bike. You will end up paying a few hundred dollars more for professional, authorized Bosch installation, but the battery alone plus the needed hardware will cost over $1,000. Getting it done the right way will be money well spent. Trying to cobble it together yourself would just be risking way too much, in my opinion.
 

fooferdoggie

Well-Known Member
even a dealer cant flash the motor for a second battery. a bosch rep can but that would be an issue to find one to do it. our tandem was designed for two batteries but they never flashed the motor to handle two of them. my dealer cant do it the rep can though. but the problem with two batteries on a Bosch is you will drain both batteries even if you only need one.
 

Edruid

New Member
its not goinjg to happen. the batteries and motor all talk to each other. you cant even add in another bosch battery to a bike without having a manufacturer level flash dongle to update the motor.
Had no idea you had to register new batteries with dealer!!!
 

Edruid

New Member
even a dealer cant flash the motor for a second battery. a bosch rep can but that would be an issue to find one to do it. our tandem was designed for two batteries but they never flashed the motor to handle two of them. my dealer cant do it the rep can though. but the problem with two batteries on a Bosch is you will drain both batteries even if you only need one.
AHA, I see the confusion. I actually only want to run one at a time. My Cube Stereo has a tailor-fit compartment for the battery in the downtube - they cost £780GBP!. So what I want is is to be able use cheaper format BOSCH batteries that don'r fit inside the frame. BOSCH actually sell some adapters. Basically I want to go bike-packing and thinking I could run cheaper rack-mounted Watts to get me between basecamps then run my £££ powertube on the technical freerides. Which would also protect the battery health of the ey-wateringly expesive 625 powertube. So anyone done that?
 

Edruid

New Member
I have owned 5 Bosch powered bikes. I am a capable mechanic and electrician and do much of my bike work. However when it comes to Bosch stuff, I always defer to a Bosch authorized shop to do the work.

Bosch's motors and batteries have a well earned reputation for being rock solid and reliable. The price of their gear reflects that reputation. They are not a bargain basement or do it yourself company. Bosch is also known to stand behind their products beyond the written warranty period on occasion. I would not do anything that would jeopardize this.

What you are proposing will definitely void your warranty. Plus Bosch has wiring harnesses and mounts that could accomplish what you want. Full integration of a second battery requires Bosch service equipment and software to complete and integrate with the bike. You will end up paying a few hundred dollars more for professional, authorized Bosch installation, but the battery alone plus the needed hardware will cost over $1,000. Getting it done the right way will be money well spent. Trying to cobble it together yourself would just be risking way too much, in my opinion.
AHA, I see the confusion. I actually only want to run one at a time. My Cube Stereo has a tailor-fit compartment for the battery in the downtube - they cost £780GBP!. So what I want is is to be able use cheaper format BOSCH batteries that don't fit inside the frame. BOSCH actually sell some adapters. Basically I want to go bike-packing and thinking I could run cheaper rack-mounted Watts to get me between basecamps then run my £££ powertube on the technical freerides. Which would also protect the battery health of the eye-wateringly expesive 625 powertube. So anyone done that?
 

fooferdoggie

Well-Known Member
AHA, I see the confusion. I actually only want to run one at a time. My Cube Stereo has a tailor-fit compartment for the battery in the downtube - they cost £780GBP!. So what I want is is to be able use cheaper format BOSCH batteries that don'r fit inside the frame. BOSCH actually sell some adapters. Basically I want to go bike-packing and thinking I could run cheaper rack-mounted Watts to get me between basecamps then run my £££ powertube on the technical freerides. Which would also protect the battery health of the ey-wateringly expesive 625 powertube. So anyone done that?
nope still cant do it unless someone could flash the motor. but after you work out the cost of the smaller battery all the parts and installation I doubt your going to save any money.
 

Alaskan

Well-Known Member
Just to be clear, when a second battery is added to a Bosch bike it can be integrated with a mount and cable tying it in to the power management system in the motors processor. When the second battery is mounted, the estimated range will reflect the total wattage available in both batteries. The bike will pull 5% of the battery capacity out of each bike alternating back and forth so that as the battery begins to heat up, it is switched to the other battery. This actually adds a small amount to the range. The second battery can be left on the bike for charging. The charging protocol is to fully charge one battery and then charge the second battery. They are not charged at the same time. In my opinion, paying for the extra battery, it would not add much extra cost to install the battery mount and integrated cabling to fully integrate the second battery into the bike. I have done both, have a bike with an integrated second battery and just carrying around an extra in a trunk bag. That works but integrated is way better.
 

Edruid

New Member
Just to be clear, when a second battery is added to a Bosch bike it can be integrated with a mount and cable tying it in to the power management system in the motors processor. When the second battery is mounted, the estimated range will reflect the total wattage available in both batteries. The bike will pull 5% of the battery capacity out of each bike alternating back and forth so that as the battery begins to heat up, it is switched to the other battery. This actually adds a small amount to the range. The second battery can be left on the bike for charging. The charging protocol is to fully charge one battery and then charge the second battery. They are not charged at the same time. In my opinion, paying for the extra battery, it would not add much extra cost to install the battery mount and integrated cabling to fully integrate the second battery into the bike. I have done both, have a bike with an integrated second battery and just carrying around an extra in a trunk bag. That works but integrated is way better.
Cool! Well i asked Bosch and they said to ask CUBE who said to ask the Guys in the shop - who said to ask BOSCH. If you have insight on what exactly to ask for of whom, I would be eternally grateful. Thnaks edruid
 

fooferdoggie

Well-Known Member
Cool! Well i asked Bosch and they said to ask CUBE who said to ask the Guys in the shop - who said to ask BOSCH. If you have insight on what exactly to ask for of whom, I would be eternally grateful. Thnaks edruid
only cube has the dongle to flash the motor. or a bosch rep. myself I my tandem has the hardware to carry the second battery but the dealer could not find the cable or flash the motor so it would work. but it works out because I don't want both batteries getting used when I find I don't need the second battery. its not hard to get some of the parts you need https://www.electriccyclery.com/pro...arts/bosch-parts-electric-bike-motor-battery/
 

Edruid

New Member
only cube has the dongle to flash the motor. or a bosch rep. myself I my tandem has the hardware to carry the second battery but the dealer could not find the cable or flash the motor so it would work. but it works out because I don't want both batteries getting used when I find I don't need the second battery. its not hard to get some of the parts you need https://www.electriccyclery.com/pro...arts/bosch-parts-electric-bike-motor-battery/
Thanks - couldn't see any plugs and sockets on there though :(
 

fooferdoggie

Well-Known Member
Thanks - couldn't see any plugs and sockets on there though :(
second page. but trying to get a battery mounted onto something that is not designed fro it would mean building some kind fo frame to hold it as the lock as to function to hold the battery in place. then you will need to get matching keys so you dont have to deal with two keys. I just cant see this saving any money at all and costing far more if you can actually find someone to do it for you.
 
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Alaskan

Well-Known Member
Once you have the battery mounts affixed to the bike and have it wired in to the bikes system, you have the option of clicking in the second battery or leaving it at home if you know you won't need it. The system will automatically recognize when you have one or two batteries on board and behave accordingly. This is not a do it yourself project. It should be done by a knowledgeable Bosch certified shop. They will know exactly which parts to get and where to find them.