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  1. M

    Need opinion : Designing a 7s14P in a small box 11*9

    Legend, thanks bro. That will make things way easier Much appreciated :bigthumb:
  2. M

    Need opinion : Designing a 7s14P in a small box 11*9

  3. M

    Need opinion : Designing a 7s14P in a small box 11*9

    I have two options One box is able to get two 7s7p stacked on top or sides Or the other options is the 11in one side and 9 in the other Limited with boxes as the either waterproof, or the space is critical. Ill have to make it work at the end :)
  4. M

    Need opinion : Designing a 7s14P in a small box 11*9

    What I understood is to build one side as 7s14p, and then fold it on top of itself, the back will be spot weld as 7s 7p and connect 0,2,4,6 with Maybe 14awg? basically just fold them together and connect them as 7s14p ? Cheers
  5. M

    Need opinion : Designing a 7s14P in a small box 11*9

    Yeah I will have to update the layout to get 7s not 8s Is there a better option that what I tried ? Thanks
  6. M

    Need opinion : Designing a 7s14P in a small box 11*9

    Thanks for your input, I had the same feeling today when I add the cells, the series connection is not strong. I have rearrange the cells now in the 12cells shape and I think this will be optimal in the series and the parralel connection. Let me know what you think.
  7. M

    Need opinion : Designing a 7s14P in a small box 11*9

    Hi guys, Just looking at option with the perfect flaw for the 7s14P I have a small box and Im limited with the way I can use the box. Application: trolling motor, step down converter for 12v phone charger Amperage draw: 18A max 29.4V and 42Ah Application 1: or Just two 7s7p on top of each...
  8. M

    BMS temp raise when using hobby charger with balancing

    Cheers bro for taking the time to answer my questions. I should have been clear but I think I confuse myself and you as well, I did another test this morning and found an interesting one. Im using ISDT T8, connecting the Positive and negative from the BMS output to the charger, and adding extra...
  9. M

    BMS temp raise when using hobby charger with balancing

    Hi guys, I tried to charge my 3s5p LGmh1 with a hobby Liion charger, If I only connect the POS and NEG from the bms to the charger it works fine with no heat and it will charger to the desire voltage 4.15V But when I connect the balance wires to the charger to balance the cells with up to 1A...
  10. M

    Parallel connecting high-V sub-pack modules with one (or more) BMS

    Hey guys, I have 98 new cells 35 of them in same production year and showing 100mAh lower the the rest of other production year. 3350mAh and 3450mAh LG MJ1 I need to have them 7s7p on top of each other to safe space and get them into a waterproof box, I thought of making two separate packs...
  11. M

    7s14P parallel BMS or Single ?

    Hey guys, I have 98 new cells 35 of them in same production year and showing 100mAh lower the the rest of other production year. 3350mAh and 3450mAh LG MJ1 I need to have them 7s7p on top of each other to safe space and get them into a waterproof box, I thought of making two separate packs...
  12. M

    How do I choose which battery is the best for my application

    Thanks Guys, the m36 has low A discharge up to 5A but 1000 Cycles. While mj1 have high A discharge rate up to 10A but 400 Cycles.
  13. M

    How do I choose which battery is the best for my application

    Hi there, Im building a pack for electric trolling motor and I would like to know what would be the best option for me.( or the safe discharge rate, so I don't heat the pack or over discharge it with the loads? The motor use 15A in continuous in full speed, with peak up to 18 max. so each...
  14. M

    7s15p or 3*7s5p to quickly charge?

    I have not got the cells yes, Im more likely to lean towards the harvested LGGB or LGDB with 3200mha. I'm not sure what do you mean by lots over 200, if its 7s=7cells in one row and 15p= 15*7 = 105 cells? they're definitely a lot but manageable size. I will have a look on the sale section...
  15. M

    7s15p or 3*7s5p to quickly charge?

    Im more likely to go with smart BMS and go below 4.1V as I would not need that longevity of the extra charge.
  16. M

    7s15p or 3*7s5p to quickly charge?

    Appreciate your time, well written and easy to understand. I would always do more research before trying anything for sure but great to know. Do you have a link to read about parallel charging or a place to read more about it. how to connect them to the parallel cells etc. I remember...
  17. M

    7s15p or 3*7s5p to quickly charge?

    Yeah I need to stop mixing the terminology 3000mAh 3.6V nominal 15p=45Ah
  18. M

    7s15p or 3*7s5p to quickly charge?

    It started to make sense to me, thanks for the heads up.
  19. M

    7s15p or 3*7s5p to quickly charge?

    My motor will draw continuous at full speed 15amp where most of the time will be about 10amp, Yeah I noticed the C charging rate would about 10.5amp which would take about 4.5 hours or so.
  20. M

    7s15p or 3*7s5p to quickly charge?

    So the pack is 7s*15p= 45amp and each cell when it discharge at rate of 1amp it gives 3000mha The motor takes about 15amp continuous and peak is 18amp with .5c per cell that would mean .5*3000=1.5amp per cell ,now do I multiply by the Series 7*3000 and then multiply *.5= 10.5 amp :shock: Sorry...
  21. M

    7s15p or 3*7s5p to quickly charge?

    Wouldn't it be easier to just buy big charger?
  22. M

    7s15p or 3*7s5p to quickly charge?

    Hey all, Planning on building a battery pack for trolling motor, I will be using LG hg2 chem. Battery model: LG HG2 Build: 7S15P or 3*7s5p I would like to break the pack to 3 small packs to allow for fast charging, I would rather have a 3 charger to charge 7s5P instead of charging 7s15P it...
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