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That's why at Gouach we created a system to build batteries without soldering! This makes them repairable and refillable :) Take a look at https://get.gouach.co

by oulipo 2y ago

That's why at Gouach we created a system to build batteries without soldering! This makes them repairable and refillable :) Take a look at https://get.gouach.com https://get.gouach.com if you're interested

serf 2y ago
first off : terrible advertising. second : how many times do mechanical-contact 18650s need to be attempted before it's settled universally that it's a bad idea for vehicles (like e-bikes that your advertisement mentions)? I hated the VRUZEND design too and they at least had the insight to use 18650s with overlapped bus-bars for the sake of rigidity and continuity through deformation. The design that you're using is, imo, most similar to the JAG35 pcb-over-terminal designs -- but as far as I know he doesn't bother trying to use PCBs over loose 18650s; only to interface with existing and pre-welded packs or packs with pre-welded stud interfaces, usually already fairly rigid prismatic packs [0] PCBs aren't that rigid necessarily; it's easy to imagine conditions in which batteries might drop out of the network. Even with lots of bolts and thick PCBs -- uneven thermal expansion due to a poorly made cell, for example. The kind of conditions that would fry a lot of motor controllers under load should the voltage suddenly change somewhere. No thanks. Let's stick with welding, it's now dirt-cheap to buy a battery welder and it's not nearly as irreversible as groups that sell things like this would make you believe. [0]: https://jag35.com/products/fully-assembled-12v-4s2p-1200a-lev60f-battery-lifepo4 https://jag35.com/products/fully-assembled-12v-4s2p-1200a-le...
- oulipo 2y ago
  Thanks for your comment! We have patented a design that uses the PCB plates, you can check details at https://docs.gouach.com https://docs.gouach.com. Our batteries are passing all certifications and vibration tests, and are running on 1500 free-floating e-bikes for around 2 years without issues!

by oulipo 2y ago

serf 2y ago

first off : terrible advertising. second : how many times do mechanical-contact 18650s need to be attempted before it's settled universally that it's a bad idea for vehicles (like e-bikes that your advertisement mentions)? I hated the VRUZEND design too and they at least had the insight to use 18650s with overlapped bus-bars for the sake of rigidity and continuity through deformation. The design that you're using is, imo, most similar to the JAG35 pcb-over-terminal designs -- but as far as I know he doesn't bother trying to use PCBs over loose 18650s; only to interface with existing and pre-welded packs or packs with pre-welded stud interfaces, usually already fairly rigid prismatic packs [0] PCBs aren't that rigid necessarily; it's easy to imagine conditions in which batteries might drop out of the network. Even with lots of bolts and thick PCBs -- uneven thermal expansion due to a poorly made cell, for example. The kind of conditions that would fry a lot of motor controllers under load should the voltage suddenly change somewhere. No thanks. Let's stick with welding, it's now dirt-cheap to buy a battery welder and it's not nearly as irreversible as groups that sell things like this would make you believe. [0]: https://jag35.com/products/fully-assembled-12v-4s2p-1200a-lev60f-battery-lifepo4 https://jag35.com/products/fully-assembled-12v-4s2p-1200a-le...

oulipo 2y ago
Thanks for your comment! We have patented a design that uses the PCB plates, you can check details at https://docs.gouach.com https://docs.gouach.com. Our batteries are passing all certifications and vibration tests, and are running on 1500 free-floating e-bikes for around 2 years without issues!