I love how you’re including safety tips here and there. Lots of new people coming into the space, I hope they’re seeing this and taking notes because I know I am!
I can't believe RUclips waited 2 days to tell me you had a new video!! Looks like this was a fun little project. Looking forward to seeing how you install the batteries.
Details, but good and important details. It's pretty cool to see how much you put into multi-step strain relief and cable management. Also, thanks for the shots of your good dog keeping you company.
Interesting to note that there are (apparently) no temperature sensors in the battery modules, that seems like a security flaw. Good on you for retrofitting them.
Yep everyone becomes a instant Internet Keyboard Warrior / Know it all. They would never dare say anything in person - but way easy to talk behind there electronic devices LOL
Great to see. I'm using the same batteries in my project and enjoy seeing how you are approaching it. I bought the thermistors that are small metal cylinders and was not intending to put them inside the plastic enclosures, but it's definitely food for thought.
Careful with that! Most metal covered temperature switches/some sensors is NOT insulated and one wire is directly short to the casing!. Ceramic ones are much safer
You must have been going non-stop, Jeremy, you tuckered out your Quality Control Supervisor, lol. Love that you aren't skipping any details. It seems like a minor detail, but if one of those cells decides to go nuclear, you will at least have a warning and be able to do something to prevent a disaster. Saw a video of what can happen if one cell in a bank fails, and it is like a string of firecrackers, one fails and triggers the others. Scary stuff in all honesty.
Interesting, didn't know you just stick them on and the cell warms the outside of the epoxy to give a temp reading, I thought for sure you would have current running through them to sense heat. Learn something new everyday! Thanks for sharing these small details. I will probably be using the same batteries.
@@ElectricSuperCar My company does the same with hydraulic pressure sensors. voltage applied to a coil as the coil changes shape due to pressure it effects the resistance and we know the pressure being applied.
@@ElectricSuperCar yeah I get it. I guess I just never knew it worked through the epoxy. I was expecting a 3rd wire that you solder on the battery. Very cool.
That looks great! It's nice to see a little bit of cable control in these projects, and a lot of forethought (e.g. connectors on each thermocouple.) most of these EV projects make me want to cry with the cable control I would recommend a second dollop of the JB weld for your strain relief instead of kapton tape. kapton will not provide a whole lot of strain relief especially with vibrations over time. The goal of strain relief is to put the force of a wire pull on the insulation of the wire as opposed to the solder joint or the point where the thermistor is bonded to the battery. Also (I couldn't see if you did this in the video) you could find somewhere on the outside to cable tie the wires down. you want to make sure those wires are locked down when they come through the plastic enclosure so they don't rub and abrade on each other. for your next project, I would also recommend you consider some RTV silicone as opposed to the hot glue. Hot glue will work fine, and I don't know what your temperatures will be like but when you are getting to the higher temperatures hot glue can start to soften and loose adhesion. RTV silicone will give you the same softness and flexibility, but will hold up a lot better over time.
Thank you for making these videos. I must have missed the info about the batteries you're using. What are they out of and where did you get them? Thank you!
Thanks Jeremy! Attention to detail as always, the little things always add up to big things. Hope the job search is successful real soon for you. Did you decide to not sell your first car? Was the displaying at the car museum a very short term thing?
So what are these going to plug in to? And how it is going to alert you to a problem? Also, have you mentioned how you're controlling both motors? Or is it the front 'slave' set up from a T3P? I'm planning an AWD EV too, sounds like a similar path, but different car! So really watching closely!
Since it's part of the fire prevention system, and it's not from a reputable source, but from what i understand, some Chinese vendor, I would make a test jig, to test each thermistor. a basic arduino some code and your up and running. Then heat them to almost max and let it cool down. Heat cycle it a few times and make sure they revert to the same temp expected. This way you can have confidence in the hardware. I would not trust them for safety unless tested.
Out of curiosity, why "JB weld" instead of a thermal epoxy? I've genuinely never tested the thermal epoxy for conductivity, so just curious if you've seen otherwise
Just did the same conductivity test you had with a heat sink I used the thermal epoxy on years ago, and it still reads as a open loop. FWIW, I used MG Chemicals 8329TFF
I forget if you have told us ... what battery modules do you use? Are they "energy dense" (optimized for range) or "power dense" (optimized for acceleration)? If I convert my MR2 spyder (poor man's Porsche) to electric, I want to keep weight down but have good acceleration. I hardly care about range at all. Edit - never mind. Found the answer below: ruclips.net/video/tFOPTWkAJcQ/видео.html
What type of thermistor? There are several different curves that you can get, but they all are described by three curves PTC (positive temperature coefficient) NTC (negative temperature coefficient) and linear. All are curves, but very much not the same. Some more exposition is required to not mislead your audience.
Didn't understand how it's going to stop the battery fire? Especially if you left the car for the night and it spontaneously got on fire. Even if you in the car it might just let you know when you should get the fuck out, but it will not stop the fire.
I appreciate your comment! Understanding why battery fires happen will help your understanding of why this is important. Li-ion is very stable unless it is over-charged, over-depleted, or too hot from charge or discharge. All of these conditions are managed by the battery management system. Having thermistors will allow the battery management system to stop charge or discharge, this preventing battery fires. Otherwise you are flying blind.
From Pakistan! Keep up the Good work and may God bless you and take away all your problems.
Thanks Friend!
I love how you’re including safety tips here and there. Lots of new people coming into the space, I hope they’re seeing this and taking notes because I know I am!
Absolutely!!
I can't believe RUclips waited 2 days to tell me you had a new video!! Looks like this was a fun little project. Looking forward to seeing how you install the batteries.
More to come!
Details, but good and important details. It's pretty cool to see how much you put into multi-step strain relief and cable management. Also, thanks for the shots of your good dog keeping you company.
Thanks for the comment!
Interesting to note that there are (apparently) no temperature sensors in the battery modules, that seems like a security flaw. Good on you for retrofitting them.
You're a brave man, doing this work on video, for an audience of frothing internet ninnies.
Yep everyone becomes a instant Internet Keyboard Warrior / Know it all. They would never dare say anything in person - but way easy to talk behind there electronic devices LOL
Thanks for the comment!
Great work on details like stress relief on cables and connector's im pretty sure these project is gonna be epic.
Most definitely!
It’s okay camera, I can’t focus either. 😂
Love the videos! It always amazes me how much wiring goes into a car build. Keep up the great work!
Exactly!!
Great to see. I'm using the same batteries in my project and enjoy seeing how you are approaching it. I bought the thermistors that are small metal cylinders and was not intending to put them inside the plastic enclosures, but it's definitely food for thought.
Good luck with your project!
Careful with that!
Most metal covered temperature switches/some sensors is NOT insulated and one wire is directly short to the casing!.
Ceramic ones are much safer
@@tullgutten Thanks. I'm not attaching mine to the cell tabs. They will be isolated and just reading the ambient air temp inside the battery box.
Keep the project up and living the real dream! And not the sarcastic way everyone keeps saying "Mon-Fri"
👍
You must have been going non-stop, Jeremy, you tuckered out your Quality Control Supervisor, lol. Love that you aren't skipping any details. It seems like a minor detail, but if one of those cells decides to go nuclear, you will at least have a warning and be able to do something to prevent a disaster. Saw a video of what can happen if one cell in a bank fails, and it is like a string of firecrackers, one fails and triggers the others. Scary stuff in all honesty.
Thanks for the comment!
10:45 love your new dog, he's totally relaxed. Great episode Jeremy, cheers.
👍💪✌️
Thanks Friend!
Interesting, didn't know you just stick them on and the cell warms the outside of the epoxy to give a temp reading, I thought for sure you would have current running through them to sense heat. Learn something new everyday! Thanks for sharing these small details. I will probably be using the same batteries.
Voltage is applied to the thermistors. Temperature changes the resistance values which the battery management system interprets as temperature.
@@ElectricSuperCar My company does the same with hydraulic pressure sensors. voltage applied to a coil as the coil changes shape due to pressure it effects the resistance and we know the pressure being applied.
Nice!
@@ElectricSuperCar yeah I get it. I guess I just never knew it worked through the epoxy. I was expecting a 3rd wire that you solder on the battery. Very cool.
Attention to the details makes it a great pleasure to watch!
Thanks friend!
i love the new thumbnail design!
Modifying the battery pack is an interesting idea
Seemed necessary
I like these “short” videos every now and then.
Thanks for watching!
That looks great! It's nice to see a little bit of cable control in these projects, and a lot of forethought (e.g. connectors on each thermocouple.) most of these EV projects make me want to cry with the cable control
I would recommend a second dollop of the JB weld for your strain relief instead of kapton tape. kapton will not provide a whole lot of strain relief especially with vibrations over time. The goal of strain relief is to put the force of a wire pull on the insulation of the wire as opposed to the solder joint or the point where the thermistor is bonded to the battery. Also (I couldn't see if you did this in the video) you could find somewhere on the outside to cable tie the wires down. you want to make sure those wires are locked down when they come through the plastic enclosure so they don't rub and abrade on each other.
for your next project, I would also recommend you consider some RTV silicone as opposed to the hot glue. Hot glue will work fine, and I don't know what your temperatures will be like but when you are getting to the higher temperatures hot glue can start to soften and loose adhesion. RTV silicone will give you the same softness and flexibility, but will hold up a lot better over time.
Thanks for the comment!
Im so happy. There’s another video from the GOAT.🐐
I’m not a bot if you wanted to know.
LOL! Thanks for the comment!
Love the thumbnail!!
Very interesting, safety is so important.
Absolutely
The puppy keeping you company.
My new helper!
Awesome episode. Short and sweet. Also, nice dog, lol. Keep up going; I can't wait to see more.
More to come!
@@ElectricSuperCar Are you really going to try to keep the same weight on the car? It would be amazing if you could pull that off.
Probably not, but I will try
Good work
Thank you! Cheers!
Awesome ✌🏻✌🏻✌🏻
Looking at your work gradually you are achieving the milestone.👍🏻👍🏻👍🏻
Feeling excited 🥰🥰🥰
Best wishes ✌🏻✌🏻✌🏻
Keep it up 💪🏻💪🏻💪🏻
Thanks friend!
Another interesting video and love the inclusion of the doggy :)
Thank you very much!
Nicely detailed video, I am wondering how thermally conductive the JB Weld is, though.
Great point!
Cheers! Great job man!
Thank you! Cheers!
I really enjoyed the content, but my like you get for the cute sleeping puppy....
😴
Thank you for making these videos. I must have missed the info about the batteries you're using. What are they out of and where did you get them?
Thank you!
Just for you!
ruclips.net/video/tFOPTWkAJcQ/видео.html
Just for you!
ruclips.net/video/tFOPTWkAJcQ/видео.html
Think your dog is happy you’re home at moment :)
Yep! Worked out great!
Great video, thanks!!
My pleasure!
How many batteries are you using to charge your vehicle since you' have do motors on your Porsche and doesn't that get expensive I'm just wondering
Thanks for the content
Just for you!
How much more would it have been to purchase batteries with these parts already installed?
Would have had to be different battery modules
Thanks Jeremy! Attention to detail as always, the little things always add up to big things. Hope the job search is successful real soon for you. Did you decide to not sell your first car? Was the displaying at the car museum a very short term thing?
No serious buyers 🤷
Nice Video, How are you going to monitor them?
With a battery management system
always good work..congrad for your new look 😉
Thank you! 😃
So what are these going to plug in to? And how it is going to alert you to a problem?
Also, have you mentioned how you're controlling both motors? Or is it the front 'slave' set up from a T3P? I'm planning an AWD EV too, sounds like a similar path, but different car! So really watching closely!
More detail to come! Stay tunned!
Since it's part of the fire prevention system, and it's not from a reputable source, but from what i understand, some Chinese vendor, I would make a test jig, to test each thermistor. a basic arduino some code and your up and running. Then heat them to almost max and let it cool down. Heat cycle it a few times and make sure they revert to the same temp expected. This way you can have confidence in the hardware. I would not trust them for safety unless tested.
Good call! I like the thought of testing. I will likely copy
Out of curiosity, why "JB weld" instead of a thermal epoxy?
I've genuinely never tested the thermal epoxy for conductivity, so just curious if you've seen otherwise
Also, I'm all for hot glue on everything stress relief! Except fingers... that only adds stress
Just did the same conductivity test you had with a heat sink I used the thermal epoxy on years ago, and it still reads as a open loop.
FWIW, I used MG Chemicals 8329TFF
Thanks for the info!
Nobody asked but I like the new look of the thumbnail.
Nice!
Very interesting... I just wish that your videos were at LEAST WEEKLY... that would be AWESOME!!!!!!!!!!!
I will try!
awesome🔥
Thanks Friend!
Thermistors, Thermistors, Thermistors and yet another one. Patients and dedication is needes 😂
One big answer: you have solar panels in your house?
Any battery bank like q backup?
Or have to pay NY taxes to have solar panels in that place?
I do not have any solar panels yet.
@@ElectricSuperCar thanks
I forget if you have told us ... what battery modules do you use? Are they "energy dense" (optimized for range) or "power dense" (optimized for acceleration)? If I convert my MR2 spyder (poor man's Porsche) to electric, I want to keep weight down but have good acceleration. I hardly care about range at all. Edit - never mind. Found the answer below: ruclips.net/video/tFOPTWkAJcQ/видео.html
This vid is HOT! Or should I say SO COOL!?
LOL! 🤣
Alternate title: How to prevent a fire.
You don't stop a fire with termistors.
What type of thermistor? There are several different curves that you can get, but they all are described by three curves PTC (positive temperature coefficient) NTC (negative temperature coefficient) and linear. All are curves, but very much not the same. Some more exposition is required to not mislead your audience.
The battery management system that I have can handle any of these types. The ones that I used are NTC
😀 👍👌
Algorithm comment 👍
Thanks for that!
👋👍
Thanks!
😀 👍👌.!.
👍
Seems like putting a band-aid on a shotgun wound
More like a vaccine preventing a disease.
Didn't understand how it's going to stop the battery fire? Especially if you left the car for the night and it spontaneously got on fire. Even if you in the car it might just let you know when you should get the fuck out, but it will not stop the fire.
I appreciate your comment! Understanding why battery fires happen will help your understanding of why this is important. Li-ion is very stable unless it is over-charged, over-depleted, or too hot from charge or discharge. All of these conditions are managed by the battery management system. Having thermistors will allow the battery management system to stop charge or discharge, this preventing battery fires. Otherwise you are flying blind.