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Originally Posted by efuture Hi, great work, i completed the whole thread in one go, awesome conversion. I have some basic questions, looking forward learning from you, hope this will give a clear picture to other members as well, |
To begin with, we Should have you too on board to help us create more awesome stuff. From your questions, queries, suggestion, its quite evident that you're one of India's Einsteins.
So I will try to answer the questioned / queries, and again, I may be wrong in a few places, apologies for the same in advance, We are enthusiasts trying to create fun vehicles for R&D.
1. Yes We are using the Kirloskar Motor that is also used in the E2O plus
However we are trying to produce higher torque with a different controller and parameters. Plus we have the 1st gear for an added mechanical advantage thus amplifying the torque further.
2. 3.35Volts x 16 cells = 13.4 KWh. On Full charge we assume 20% higher voltage thus 14.9 KWh ~ 15 KWh. Please correct me if I'm wrong here.
You're right in the range calculations however the weight of our car isn't 1.1 ton, we have tried a lot of things to get the weight of the car down, thus providing a better power to weight ratio.
3. The port provided in the car is only for the regular charger. For fast charging we have to directly connect the batteries manually. Still working on the same. Our next vehicles we are trying to implement CCS Connectors. We have just ordered the necessary hardware for that yesterday itself :P
4. You're right yet again, but the weight factor needs to be adjusted. Also this was by taking the batteries to extreme critical, driving in cold conditions, and with absolutely no power electronics apart from motor controller.
5. Yes we understand reaching 0% is bad, Learning and trying to implement good BMS Solutions. Thanks for your input.
6. SOC is not shown, but is measured. Still need to have it on the display. the BMS Monitors every cell electrically and thermally. Still working on all of this. I don't have a finished product. It's a work in progress.
7. Please don't get me wrong, but there's seriously a lot of work that goes into even fitting bought out components. You'll see the list of things we will be engineering and working upon in the Youtube series that we are launching soon. Starting off with the Maruti 800 build. Will take most of your considerations made here too. For the CAN Network, NO We have not touched the CAN YET. However we are working on it, and again we are still learning, and implementing as and when possible. We take time off our regular work and do this whenever possible. Thanks for your inputs once again.
8. I really believe it is possible, however I also know I have a LOOONNNGGG Way to go before I actually make a Reliable, and Safe Kit like that. But the day will come. When it does, you'll be the first one I Ping

Also When I meant 600 BHP, I meant an EV Equivalent to a 600 BHP ICE Vehicle. Please don't misunderstand it to be 450 KW of Motor Power.
9. Like Mentioned previously, I'm not a battery expert, thanks for your valuable inputs, I'll research some more on this topic.
10 & 11. I actually have and may be my luck but nothing has happened so far.. I'll take a look into this and do some research. Thanks yet again.
12. Fuses are located not between cells, but on the line from the Cell to the BMS. Incase of a short circuit, the BMS Cuts of the main relay. That's what. I meant by fuses on each battery. And no it cannot stop short circuit between one cell.
13. Still a work in progress, and we wish to disclose that information in the youtube series.
14. I'll take a look into this, thank you for your suggestion.
15. I'm glad you feel EV conversion is simple. I believe we will see more conversions soon from enthusiasts then.
Yes regarding safety there are lot of concerns, I am still exploring and learning the same, plus everyone knows batteries are very dangerous and explosive. I just thought there's no need to explain what people probably already know, BUT you have a valid point, I should have mentioned it; will mention it in my further videos. But just because its dangerous doesn't mean we shouldn't explore it right? After all Fuel also was explosive. I know batteries are far more explosive, but at the moment, we do not have an alternate choice. If someone comes up with a safer and better battery, I'll be more than happy to implement it.
Plus, I wasn't doing this for money, fame, or even to sell my car in the open market. I was just doing it for Academic purposes and to share my knowledge with others. Such projects cannot be commercialised so easily without proper safety guidelines. A Commercial kit needs to be entirely different. But it all starts with projects and R&D, doesn't it?
Im really glad you have built EVs too. It's great to have you onboard, and an honour to have your valuable inputs that can be used on our work further.
Good day brother, Take care. Thanks.
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