Recent content by vreppeto

I will take it. I live in Salem, Or 97305 . shipping looks like 25 or 30$ ups ground. Which kit? How many watts?

I'm sorry says my controller is not the same. The programming cable will only work with Pei scooter controllers. He told me to cancel the order so I did

There is no info on this scooter. Tracking this stuff down has been difficult so I hope this will help some people that are looking for info.

So I found this controller when I went to replace the one in my ev standnride. PEI Scooter sells it here...

According this guy https://github.com/delboy711/BST900 the bst900w uses a ucc3803 pwm controller. I think I will try the serial connection on the dpx800s to see if I can query the controller. here is a forum for the bst-900w on eevblog...

I bought two of dpx800s from drok on amazon. Both of them failed almost immediately. They both overheated due to a failure of the fan. The mosfet controlling the fan is hiding under the cooling fan next to fan power plug. It is labeled d4184. This appears to be a 40v mosfet. The mosfet that...

the link may not be valid any longer but it is " https://jag35.com/collections/lithium-batteries/products/12v-a123-nec-alm12v7-ups-battery-modules " as of 6/12/22 . When you click purchase it leads to an entirely different product at batteryclearinghouse.com "...

I have been looking at lubricants for the blue gear. The molykote em-50L appears to be a PAO lubricant with lithium thickeners and a molybdenum additive. It seems to be a unique blend. Here is a decent article on lubricant selection...

Someone said something about A123 lifepo4 being extremely volatile so it is not always true but the liitokala 32700 lifepo4 cells seem to be pretty safe. I was charging 16s2p in a honeycombed pack with hot glue and shrink tape. The analog balance board failed and I was sitting right next to it...

No judgement from me. I am grateful you are willing to share these details to save me from a similar fate. So can I assume one of the takeaways here is that redundancy is key in development of a safe charging protocol? I am thinking a smart bms and a smart balance board so either can stop the...

I know it seems okay to you to high jack someone else's thread for such an argument but it's not. If you want to argue about it start another thread. I imagine if you mention my name I will be notified. If you do then anyone who cares to join in the milieu is welcome. If you choose to do so...

Did you find this site yet? https://jkbms.com or this one? http://www.enjpower.com/

Not very convincing. https://www.youtube.com/watch?v=Qzt9RZ0FQyM

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I use a cc/cv power source for charging. In order to charge my cells I set the OCV and the current limit of the power supply then hit start. Because of resistance I have to set the OCV at 5v in order for the cells to charge at 3.65v. As soon as the charge voltage goes to 3.7v I lower the OCV...