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  1. batteryGOLD

    Charger will not connect with Li-ion battery on tree trimmer

    low volts.. some slovenliness outhere.. Maybe all cells are finished or not.. if each one of 10 cells has at least 0,3V it could be revived.. depends on cells quality/brand (when cells go under 1V it could be unrecovered, or some go into internal shortcircuit, some cells break & go open.. or if...
  2. batteryGOLD

    Interesting.I wonder if it has 2 BMS

    Just cut battery to see whats inside (do autopsy!) Sure is two output cables connected to same output from single BMS (I inspected hundreds of batteries and no one uses dual BMS..) Is just a simple trick to feed dual supply controllers! and it works great for 90% cases :unsure:
  3. batteryGOLD

    What Electrical Components on BMS limit Continuous Discharge Current?

    Take an example of a 30A rated BMS, it will handle twice Amps means 60A continous with no problems for many seconds, and will detect overcurrent at 120A (4 times rated current) But it will detect short circuit at 200A (it will cut power at this point, similar to active fuse) This is example for...
  4. batteryGOLD

    Bosch Powerpack 500 with only 420Wh

    lucky those packs don't have 30Q leaking voltage cells !! just sayin.. Samsung 30Q cells tend to get voltage voltage leak problem over time, maybe a random cronic 30Q disease.. no one knows why, but it could happen sometimes, anywhere at time frame usage.. (if just one cell is leaking, the...
  5. batteryGOLD

    6 punctures in 16 months, help!

    Hi there. no tyre is bullet proof! unless tyre is made of steal mesh. maybe could add a steal mesh inside tyre :unsure: or just use bicycle tubeless foam.. some people use slime for tyres air tube extra protection, but it will get into a dirty mess..
  6. batteryGOLD

    Can you run 12V heater on a 60V battery pack?

    I've done a similar xperiment w/ 60V battery to power a 12V 100W LED panel U need to use a step-down / buck dc-dc converter 60V to 12V for your app requirements 5A 60W, soo maybe a min 100W step-down dc/dc module would work fine 60W, is it really a heatear?? :unsure:
  7. batteryGOLD

    When to charge Lithium battery.

    There is only one way to keep any battery constant soc charged @ 50% +/-0.01% The way is to connect a 50% SOC battery to veicule & to some high drain charge source simultaneous ( voltage equals number of S elements times 3.7V ), while Ur usin battery at veicule ride (charging same rate of...
  8. batteryGOLD

    When to charge Lithium battery.

    There is only one or more rules worldwide for optimizing lithium battery chargin & life! Put at charge whenever possible! The battery preferes small packets of charge instead of a full duty charge! Allways carry charger with U, put battery at charge whenever possible, don't stole energy...
  9. batteryGOLD

    how to test faulty bms

    Hi people, check tha faulty new bms (I took one randomly from new lot, and got faulty. what is tha probability of any other bms,from same lot, same problem? or tha probabilty of find at least one workin from that lot? ) does not have high limit voltage cut protection, voltage at this...
  10. batteryGOLD

    Easy way to add SuperCaps for better regen etc..? (white paper)

    instead of supercapacitors could use high C LiPo's, saving a lot of money and space.. :unsure: Is there any advantages/dangers of paralleling a Lithium battery with a high C , few capacity LiPo's same S elements? maybe need to limit voltage max 4,2,V and minimum 3,3V to match LiPo voltage...
  11. batteryGOLD

    72v vs 96v same output

    basic electronics, a system with lower current is more efficient. less heat at components, cables, and motor coils. current is equivalent to water pressure in a tube in terms of performance, both 28kW, you have to test to see results! in terms of range, more volts with less amps discharge...
  12. batteryGOLD

    PSU vs charger

    PSU is not a Charger! but in some cases could work as a charger.. but make sure U know what U'r doin.. :unsure: PSU is a power supply unit, constant Volts Charger is current supply, constant Amperes Soo when chargin a battery, remember to limit those Amps.. so better ideia to use a charger.. a...
  13. batteryGOLD

    What kind of safety measures do you take when building battery at home?

    at EU time 15:31 people should be workin or doin anything else, instead of checking tha forum! at this time is duty time! so everyone worldwide should be doin useful stuff!
  14. batteryGOLD

    Going from 52v to 72v on a Phaserunner - effects on lower speed performance?

    anyone remember SAFETY when riding scooter, patinetes,etc . remember, u'r not inside a metal car, so body is only defensive against riding circustances/environment ! google source: Kinetic energy is energy possessed by an object in motion. The earth revolving around the sun, you walking down...
  15. batteryGOLD

    Going from 52v to 72v on a Phaserunner - effects on lower speed performance?

    check example the xiaomi m365 (runs a 10S 42V battery) controller main capacitor 63v and the MOSFETs are 75V_max 80A STB75NF75. at good hardware design, the capacitors used are not running at limit voltage.. (42V using 63V caps is different design than a 58.2V running w/ 63V caps.. (this...
  16. batteryGOLD

    When you had a cell go bad. What was the main mistake you did?

    don't trust any cells.. pyrotechnic stuff is not 100% trustable.. careful there is just a 0.03% chance of igniting battery.. but depends, it could rise to 1% or 20% or 100%! depends on how U use it 🎃 do you trust at Sony made in Japan cells or U prefer china cells?
  17. batteryGOLD

    Going from 52v to 72v on a Phaserunner - effects on lower speed performance?

    this is a 38% overclock voltage (careful to not explode controller capacitors, but controller may continue running even w exploded capacitors!) U can't simply use voltage racio to convert into speed racio 40km/h to 55km/h.. the dificulty of speed increases fast because air friction math is not...
  18. batteryGOLD

    When you had a cell go bad. What was the main mistake you did?

    & also careful about "iBMS's" / smart BMS's with BT app. most chinease apps installed @ phone have permissions to Ur phone files and other phone system permissions.. Careful when installing ANY app at you phone! learn about online security, do not install crazy apps :unsure:
  19. batteryGOLD

    Going from 52v to 72v on a Phaserunner - effects on lower speed performance?

    see what people do to xiaomi m365 trotinete / patinete some crazy people add one or two extra elements in serial w 10S battery voltage rise from 42V to 46,2V or 50,4V ( this overclocks voltage by 20% ) is 20% extra voltage safe for a xiaomi m365 controller? any performance reports / reviews...
  20. batteryGOLD

    Going from 52v to 72v on a Phaserunner - effects on lower speed performance?

    most controllers handle "overclocked voltage" a conttroller rated for 14S battery, could easy support extra volts usin a 16S battery (check internal input capacitors voltage) 58.8V to 67.2V this is about just 15% voltage increase overclock.. those extra volts will give more performance...
  21. batteryGOLD

    When you had a cell go bad. What was the main mistake you did?

    only need to use insulation cards if no use of plastic holders. this way adds electrical separator between S elements, than U could use hot glue to give extra structure, plus adesive arround battery to secure all cells!.. Is is better to use holders or save some dollars on some holders and spend...
  22. batteryGOLD

    What´s the difference between a BMS with a C- and P- wire compared to one with a shared wire for C/P?

    I don't know the answer to Ur question.. and add more electric veicules to tha list "Most ebikes have no regen Most e-scooters have regen. Faster and stronger vehicles may have regen" Patinete/trotinete Xiaomi m365 has regenerative braking.. plus many other trotinetes, some don't have fisical...
  23. batteryGOLD

    Hydraulic Press vs. e-bike battery

    tha youtuber didn't even crushed a simple 3S LiPo 100C battery fully charged at 100%.. those LiPo fires are super massive! powertool battery will give much more pressure fire, but for less time is different to smash a 10%SOC battery vs 100% SOC battery or regular cells vs high current cells...
  24. batteryGOLD

    Hydraulic Press vs. e-bike battery

    wowww did youtuber charged all batteries full before goin under press? a 100% charged battery will do much more fire than a 50% charged battery! (even at 20% soc charged battery fire is massive!)
  25. batteryGOLD

    What kind of safety measures do you take when building battery at home?

    what happen if u throw ethyl alcohol inside that cylindrical container? maybe 100mL ethilic alcool,better sprayed inside container, & than use a lighter to star fire.. careful with that experiment.. first try a gallon container, spray ethilic alcohol, than put a fire.. see it like a rocket...
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