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Crushing Huge Lithium Ion Batteries with Hydraulic Press Do not try at home.

Someone built an electric vehicle which charges from solar and is a means for human conveyance :)

What?

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Hello, Lately it has been so hot outside. The solar power fridge I have been running for two months has finally started to decline in charge at the end of each day. It is time to connect an AC charger to the battery. The victron AC charger arrived. It says it can charge at 17 Ampere DC, but I...

https://diysolarforum.com/members/richardfromeg4.43351/ As of today, this profile has advertising promotional material in the profile background. How do people feel about the profile background being used for commercial promotional purposes? I Feel Bad About It. Mine is icebergs because I'm a...

my current power bank is insufficient for my needs. dear friends, the internet has delivered the solution to me. the best design for portable power bank that maybe never run out. dear Geng has released a design for 27,000,000-mAh portable power bank i hope my harbor freight 100W panel can...

Hi all, Saw a post about someone who made a rig to test flashlight brightness, to compare devices to their claimed lumen output. They seem to do other stuff too. Just learned about it today. Always great to compare the box label to the real performance. Their methodological grit seems...

When I load a thread and scroll down away from the topic, the top bar shows "Forums, What's new, Resources, Members, Wiki, DIY Solar Blueprints" then some notification stuff Can we have an option to display the thread topic right below this, so when people are scrolled halfway down when loaded...

the thorough explanation was pleasant for me. hope some might enjoy / learn :)

Dear solar diy hackers, this video talks about how the inside of battery works, perhaps enjoy ☀️ no affiliation with channel, i enjoy learning ? if there are flaws or inaccuracies in the video, please bring them up so we can learn more about the various principles of operation of lithium ion...

As an amateur, finding myself constantly ignorant of electrical engineering concepts, these pictures guided me home on kW vs kVA ??

Hi, Some people spend a lot of money on fancy shunt resistor device to monitor How Many Amperes running through their system in real-time. Victron seems to sell one that is popular, but it’s really expensive. Shunt is just a big resistor, when Amperes flow across it, one side has slightly...

has anyone used these before? integrated resistor that contacts first before the full connection. https://www.amazon.com/Pigtails-XT-90S-Connector-Silicon-Battery/dp/B083SC9P71/ seems kinda neat. never tried it myself. dunno what the resistor value is. if i get one i’ll try to measure that...

Update to someone building a solar tug boat. Apparently it pulled them 20 miles and used photovoltaics for input and LiFePO4 cells for storage.

Hi All, As an amateur, learning about the electronic engineering aspects is something I have a lot to improve upon. This blog post that I recently read explained some of the issues related to applying voltage to circuits with capacitors/inductors, in a way that helped me feel less confused...

I really enjoyed this talk. It's sort of long at 1.25 hour, and chock full of good info. Plain english. It helped me fill in some of the gaps in my understanding of LiFePO4 cell chemistry. Of which there are many. You could say my understanding has many gaps which lithium ion knowledge could...

This image only has masculine figures. Everyone can discover something new. Good luck on your current curiosity or fixation. Carbon animates all of our lives. Good luck.

Seen on interwebs.. https://hackaday.com/2021/09/18/solar-powered-autonomous-tugboat-for-rescuing-autonomous-vessels/ Two 100W panels on a small water vessel, charging LiFePO4 cells with an MPPT solar charge controller ? 76mm brass propellers who you gonna call.. ?

good luck on your project

38,400 J discharged through an AWG22 copper conductor. ~0.01 kWh delivered from a capacitor bank at thousands of volts. it appears the conductor turns into a cloud of copper vapor... not sure what bearing this has on any DIY builds.

Has anyone done this or want to talk about doing this? Run water/glycol through tube on backside of solar panel, use heat pump to cool down solar panel so much that humidity from local air condenses onto the solar panel, if mounted at an angle, it drips off, taking dirt with it. It would even...

Hello, People like lower temperatures for some times, and higher temperatures for other times. It seems to need a lot of electricity energy.. Heat pumps, especially in the form of refrigerant based compressor systems, and also peltier based systems, are capable of controlling heat flow with...

This webite offers browser and mobile app based noise generators which are customizable. https://mynoise.net/ It’s free, and the sounds range from forest wind leaves birds ???, to machines airplanes cars train traffic boat?, various chanting and sci-fi sounding stuff if you’re into that. Hope...

This video goes over a variety of ways to thermally manage a battery pack. Edit: added some excerpts. The speaker's accent made comprehension slightly difficult for me at times, but the content is quite good so I just gotta post it.

An article from last year, that I recently read, had some interesting insights about LFP tech going forward. An executive summary for yall: Just quoting this part because it's mildly nuanced: China MIIT regulations approved in May 2020 will require EVs to inhibit any fire or explosion within...

This on anyone’s radar? Seems relevant to the interests of the community. Source: https://roskill.com/news/batteries-the-true-drivers-behind-lfp-demand-new-safety-standards-costs-ip-rights-esg-simplified-battery-pack-designs/

https://roskill.com/news/batteries-the-true-drivers-behind-lfp-demand-new-safety-standards-costs-ip-rights-esg-simplified-battery-pack-designs/

https://openscad.org/ This free program lets you design your solar rack or battery pack by writing a text file that describes it, and the 3D model is automatically generated from the description text file. For example, to make a battery cell all you need to do is type cube([200,100,50]); This...