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This $20 hammer crimper will last a lifetime and costs the same as only 2pcs of 4/0 lugs Hammer is not included ;) TEMCo Hammer Lug Crimper Tool 5 Year Warranty by TEMCo Industrial Learn more: https://www.amazon.com/dp/B00E1UUVT0/ref=cm_sw_em_r_mt_dp_U_CAmnEbF47GKVQ

Float cannot overcharge because it's voltage is set to less or equal to resting OCV of a battery, so there is no current flowing into the battery at float. Float is not there to charge the battery, it is there to supply whatever loads present to prevent discharge of the battery. If the battery...

This is true only when all batteries in series are in the ON state. But the moment any one battery BMS goes to OFF state ( any protection event like cell voltage or temperature ) that BMS will "see" combined voltage of the whole pack. @Steve_S is correct that it's all about voltage rating of the...

You can get 10 years from cells charged to 3.5V and even to 3.55V, while using 80%-90% of their actual capacity, but you have to realize that temperature effects aging just as much as voltage and also that calendar aging exists even if you don't use them at all. All 3 factors matter, so take...

This is physically impossible when all cells are connected in parallel, which is a premise for this procedure. As cells become fuller and fuller, their individual SOC gets equalized naturally because current splits naturally between cells based on their demand, which is controlled naturally by...

Exactly 3.73 hours, or 3 hrs and 44 minutes. Assuming your charger is connected to the battery with very little voltage loss, i.e. heavy gauge and very short cables. At these parameters the entire charge will be in CC mode, so the math is very simple - (280AH * 60%) / 45A BTW, this thread is...

Guys, I am giving away this battery for FREE, so you can get some use from it, learn something, use it as paperweight or a door stop if you want ;) This battery was used in my home made EV for a while, then for my bench testing, but I recently got newer cells, so I don't need this one anymore...

Yes Will, you are missing something. The fact that 99% of people online are not electrical engineers and have no idea what technologies are best for specific applications. If words “super” or “nano” are used, then people will believe anything, just like snake oil of 19th century. Also, caps...

won't catch fire or explode??? my friend, you have not worked enough with capacitors to make this statement. They explode spectacularly, you will never forget it. almost all the benefits you listed are marginal compared to modern Li cells and Li cells are also improving constantly, so the catch...

@Delta-V IMO you still got a really good deal on a 24V 348AH battery. The fact that you were able to get 100% capacity speaks for pretty well matched and balanced cells. I looked up the BMS IC specs, from BYD, and it looks like a decent simple BMS design, without fancy bells and whistles, but...

Not true at all. Read the specs for charge, it states voltage and termination current. Those 2 values are related and you can adjust both in either direction and still get 100% charge. Battery is not charged by voltage, it's charged by Coulombs , or Amps over time. Voltage simply facilitates the...

I buy my stuff from this supplier, never been disappointed https://www.circuitspecialists.com/switch_mode_power_supplies

Imagination and ingenuity applies to all technologies alike. Electrons are much harder to trap due to their small size and mobility, while ions are easier to trap and release using carefully formulated materials. Electrons love to jump thru dielectric barriers, so thickness of the barrier and...

This BMS not only can't handle so many Amps, it also can't handle the voltage of 4 series connections, so it blew up quite easily. If you need a 48V battery for your vessel, you should build a single 16S battery with a single 16S BMS, which controls a heavy duty contactor, because MOSFET BMSs...

Thank you, but Electrical Engineering college courses and 12 years working in this industry taught me better that some YouTube videos. It's been a while since I checked this forum, but clearly FUD is still king around here. Here is an example of reputable SCC...

This is an excellent advise based on years of experience. Also, make sure lug is bolted tight, but don't exceed torque value, stripping the threads in your expensive battery ( depends on terminal type ). Use lock washers, but never ever put any washers under the lug. Yes, I have seen people do...

Sorry, but all of your assumptions and conclusions are wrong. 22AWG wires are for cell voltage sensing, not for carrying current and have nothing to do with BMS current ratings. BMS does not shunt and sense at the same time, it uses time multiplexing to temporarily turn off shunting when it...

I only become electrical person when my body completes the circuit, see my avatar. All other times I'm electro-chemical person, you know the neurons and stuff... ;)

What are the dimensions and weight of each battery? Based on your test numbers it looks like you have 100AH batteries, and not even good ones at that. Based on how the seller has treated you I hope no one else will ever buy from them again. I would use every possible option to get a refund or at...

Don't think in terms of problems where there are probably none. So many newbies ruin their cells or make problems when there weren't any, just because of mindset that something is wrong. Don't deplete 1 cell, there is no point in doing it until you know for sure. Here is a simple path: 1. Charge...

I never claimed float is necessary for the battery, but it can be beneficial for the customer's application. This is the key of our disagreement. You certainly don't need to float a lithium battery, as it has virtually no self-discharge, but it could be helpful to maintain a fully charged...

I am very sorry if I offended you in any way. This is just my weird personality showing in the way I write on forums. It is entirely on me, not you. Welcome to the forum and thanks for sharing your experience, it could help others prevent making a mistake.

Will, please look into different UL standards for batteries and the difference between UL Listed and UL Recognized labels. There are lots of shady statements made by some battery makers when they mention UL. For example, UL1642 deals with individual cells while UL2054 is for small rechargeable...

Except that hardly anyone is selling A cells in retail market, especially not on Ali or even Amazon. My crystal ball tells me that most sellers will soon claim their cells are all A grade, which of course is impossible to prove because grading is not an industry standard, it is up to each...

It's a vicious circle: - consumers want to support local manufacturing - local government is hostile to local manufacturers - few local manufacturers who survive can't compete with cheap offshore labor - consumers shop around and buy cheap offshore product - consumers complain there are no local...

There is no such evidence, it's all just gossip from inexperienced consumers, not understanding nuances and repeating false assumptions made in online forums.

My data is my personal experience, which means squat unless I post my name and company, which I choose not to at this point, maybe later when my company has a competitive product to offer for DIY market. There are scientific papers you can find easily via Google, where names of scientists and...

You say you are lazy, but seem to create a lot of work for yourself ;) My question is why do you think you need to do any balancing at all? And if you actually really need to ( very unlikely ), why not just do one cell at a time after a full pack charge? Charge the pack, see which cell is...