Battery Hookup new listing “Case 100x 3.3v 2200mah - 200x 18650 Lifepo4” for $100.00 + shipping

[sam_sam_sam]

On the other hand, BH hasn't responded about my dead pack... could have been used for more storage...alas it's dead.

Give them a few days and still no response send them another email about it again and point out that you already sent them an email about this issue already be patient but be persistent about it sometime they are a little slow to respond to emails

In your email to them did you include any pictures of the issue if not when you send the next email include this information this time and ask them if they need you to open the battery pack for any testing that they need you to do

if they do not respond let me know and I will see what I can do about it or send me the battery pack that is having the issue and I will send you one that I did a load test on and I will deal with them about it this issue because I need a battery pack to scarified for splitting apart to see if it can be done safely because I want to build something but I am not very eager to split a working battery pack I have done this in the past and things did not go well and this battery pack went into flames twice in very short period of time so I very reluctant to do it with good battery cell pack

I did a voltage test on all of my 24 volt battery packs and they all roughly have the same voltage level but what I noticed is that the voltage unbalance profile voltage differences between is all over the place so far no two battery packs are not the same interesting results I would have thought that there would be some similarities between battery packs the battery amperage are similar in nature the response of the BMS protection boards are very similar in nature which I am glad to see

What is the voltage and current requirements for the inverter system that you are using need to know what the lowest voltage and minimum current is required for proper operation because there might be a certain conditions that it does not preform adequately for the battery pack configuration I have seen this issue before with certain conditions with certain devices and sometimes it is not documented and if this is the case then you have do your own testing and determine what the actual conditions will cause the issue and is there a work around for this condition

If you have a multi meter that can do 10 amp load you need to test if each battery pack is output the same amount current from each pack it could be that the BMS protection boards might not want to play with each other in this configuration and you might need to just use one BMS protection board that can handle your inverter

[eccerr0r]

Well, the intent was to open and modify one or two to 12V, and a bad pack is the best candidate for such experimentation. It would be nice if I got what i paid for, all I understood when I bought them, they should all be working...

Damn. Rainy day today, no solar energy. Need to recharge after draining a bunch of these batteries...

[sam_sam_sam]

Please let me know how easy it is to separate the battery packs

[eccerr0r]

Will be waiting for BH's response first... and I don't think I'll be really breaking apart the pack, more of...reconfiguring it...

[sam_sam_sam]

Will be waiting for BH's response first... and I don't think I'll be really breaking apart the pack, more of...reconfiguring it...

Let me know what BH respond is

Do you plan on cutting the buss bar that connects the two sides of the battery cells to make them independent of each other
I thought about doing it this way but having to put hook up wires to each battery cell is appealing undertaking I would rather split it down the middle and flipping it over and use tabbing to connect each of the battery cells together I just not sure how this is going to turn out but I going to use a battery pack that tests the lowest amp hour to be gene pig for the mad scientist to be donator battery pack for science purposes hopefully things do not go horribly wrong

I will let you know how it turns out if things went horribly wrong or it was a successful undertaking and will try it again for a couple more battery splitting down the middle of the battery packs

[eccerr0r]

Don't know yet. Wonder if I should just go ahead and start the dissection...

[sam_sam_sam]

Don't know yet. Wonder if I should just go ahead and start the dissection...

It might help to know what is wrong with this battery pack is the BMS board or is it just self discharging battery cells then you would know the direction to go in

[eccerr0r]

Still treating it as if it were a new device and until BH gives word, everything is stalled...

Right now I'm having doubts at the service quality of BH...

[eccerr0r]

So how are you opening these packs, need to figure out a way so that I could somewhat tape these shut once more and at least use it for electrical insulation without it wanting to just fall off?

I might have to assume batteryhookup is not going to honor the fact these batteries are all supposed to be working.

[sam_sam_sam]

So how are you opening these packs, need to figure out a way so that I could somewhat tape these shut once more and at least use it for electrical insulation without it wanting to just fall off?

I might have to assume batteryhookup is not going to honor the fact these batteries are all supposed to be working.

Like I said before preset about it do not give up that easily or send it to me and I will deal with them about it

All you have to do is cut the heat shrink tubing along the cables just do not cut into them the first layer the second layer is done the same way but it is not as easy to do as the first layer but it is doable and just peal it off of plastic plates that are around the battery cells just be careful with the top plastic plate because the BMS board is just underneath it the other end has a foam block that needs to be removed but it glued on so it is a little hard to get started but once started the rest of it is a lot easier

[eccerr0r]

Well shipping these things is totally not worth it. Just wondering if I should start just slicing into this bad one now before getting any response.

OTOH was able to get 80Wh of battery power onto my house... as if it really is that much. Voltage too low/GTI didn't think it could draw more than 3 amps from the batteries. Using a couple in parallel so 3A isn't even close to battery or BMS limits...

[sam_sam_sam]

OTOH was able to get 80Wh of battery power onto my house... as if it really is that much. Voltage too low/GTI didn't think it could draw more than 3 amps from the batteries. Using a couple in parallel so 3A isn't even close to battery or BMS limits...

Is this a good thing or am I missing something here I do not know that much about GTI and how they function I only have a rough idea of the operation from what you have described in these post above

I do not think that the outcome is going to make a difference in what BH decides to do in this particular situation but I am disappointed with how they do not even reply to emails request I know that they are very slow to respond to emails in the past but from the looks of it this has gotten worse apparently

I would definitely dig into it and find out the cause of this battery pack issues and see if anything is salvageable from this battery pack or not and go from there

[eccerr0r]

It's a function of whatever the GTI decides to do (MPPT). I don't know the algorithm or limits of the GTI so can't tell if it's due to battery or GTI or even wiring that's limiting how much power it decides to pump into the system. Theoretically, however, batteries have much lower ESR than solar panels of which it was designed for, and the GTI may make assumptions that are not valid for batteries -- which also explains how the GTI works when I power it with a PSU.

And thus I need to get started hacking these batteries so that I can do some experiments on this.

As an aside I wonder if I need to somehow get 6 volt increments so I can use my UPS again, haven't used my 18V UPS since its lead acid batteries died... it is now known to eat batteries due to its crappy charger.

[sam_sam_sam]

As far as the crappy battery charger that does not like acid based battery packs it might not be so bad for Lipo 4 battery pack cells because from the testing that I have done on these BMS boards they seem to be decently made you might be able to reduce the voltage output down to 15 volts or so which should be fine unless it can not handle high current draw and starts hiccuping this might be an issue unless you can control the current if need be

I wondering what the issue really is with the GTI because I do not understand why an ESR value would be a determining factor in charging a battery pack I have never heard of such a thing that does not mean that it could be true but what would the reason be for monitoring this in the first place ( because if was monitoring this it would have to be a four wire system to be able to detect the difference in voltage from the solar panel cells and the GTI interface unless it has a 4 wire system how else would you be able to detect a voltage drop because your current would on two wires and the voltage monitoring would be on the other two wires and if you were going to do this then why would you not do the same thing from the GTI to the battery have four wire system as well and compare the results from both ends )

I have to wonder if it really is that the solar panels are not pushing enough current for the battery BMS balancing protection board but even this thought is not correct because I can turn down the current to less than 110 milliamperes and it is still charging my battery testing machine has an issue with the milliamperes being this low it thinks that the battery is fully charged when in reality it is not so I wondering if you got some kind of limitation that you have not discovered yet

The interesting thing about this is that when you use a power supply it works the way you expect it to this does not make much sense to me this would bother the hell out of me until I understand what is really going on with this but that just me when it comes to questions I can not understand what results that I am seeing

Here is something to try put a bunch of filtering capacitors on the output so you can eliminate the possibility that it using some type of frequency that makes it work better this is just a suggestion and a thought that came to mind


Or

Is it the BMS board behavior is different when charging from a battery pack I going to try this out and see if it behaves differently or not ( how I will run this test is as follows

Take a 24 volt battery pack that is fully charged and another 24 volt battery pack that is fully discharged by the BMS protection board with the individual battery cell voltage monitoring module and my multiple meter in the current mode and see what happens and at what point does the BMS turn off the current when it reaches what current level yes it might damage the BMS protection board but I curious to find out what this value is and if the BMS behavior is different when changing from a battery source


I would also like to do some GTI testing but I am not sure what I need for the application that I have in mind or doing some testing on a MPPT controller and even with this I am not sure what I need even for this application that I have in mind doing

or

a combination of both of them

What I mean by this is what specifically do I need to know and look for in the description when looking for one I would prefer one that dose NOT have a micro controller in it because I do not want to have to worry about what some developer wants to do about what ever problem they were trying to solve I want to see what these issues are myself

Right now I just want to get something to do a bunch of testing so I can understand what to expect and try to understand the algorithms that are used and for what reasons are they trying to accomplish by doing it that way

I mean I could make my battery testing machine work of a battery pack hooked to solar panels with a charging controller set up in a certain way that the battery pack does not get over charged but I do not think this is going to be very efficient way of doing things but I might test this idea but how do you determine efficiency on something like this

I have the voltage which is 12 volts for the battery testing controller and the charging relay that is used I can get the current required to run the battery testing machine correctly but what else is needed to do the calculations

[eccerr0r]

FUCK
Found out why this battery failed: IT WAS FUCKING SOAKED IN WATER, it's completely corroded!!!

[sam_sam_sam]

FUCK
Found out why this battery failed: IT WAS FUCKING SOAKED IN WATER, it's completely corroded!!!

Send these pictures to BH and get a little bit more forceful about it there was no way to know that is what happened to this battery pack

[eccerr0r]

sent. still no response...

[eccerr0r]

So, did I get ripped off?

[sam_sam_sam]

So, did I get ripped off?

I am not sure because yes they have been slow to respond in the past but now not to respond at all I really do not know what to tell you

[eccerr0r]

I was merely joking with their slogan " Don't Get Ripped Off, Get Hooked Up" ... eek.

Sigh. If they're going to give bad batteries they should say so, else if they said they are good "They all have good, consistent voltage and a 15a rated BMS" they better be good and back it up...

On the other hand do I have to worry about this pack doing "rapid uncontrolled self-disassembly"...