How to Fix a Renogy 170ah Lifepo4 Battery

This video walks you through adding a balancer and top balancing the cells. This should sort out these batteries and make them work again!
0:00 Intro
0:56 Opening the Case
5:10 Checking the state of the Cells before charging
6:13 Top Balancing using a Benchtop Power Supply
10:29 Lifepo4 Cells and they're relationship between voltage and SOC
12:24 Installing the Balancer and Switch
20:02 Powering up the balancer and checking it's working
21:50 Finishing the Top Balancing with the balancer and power supply
23:55 Result of balancing and top balancing
25:26 Refitting the case and screwing it closed
26:33 Conclusion
High Temperature Battery Tape: www.amazon.co.uk/dp/B0BVFHZQY...
5.5a BMS 4s Active Balancer Board with protective case
www.amazon.co.uk/dp/B0CKHCGSN...
DPDT Latching Switch
www.amazon.co.uk/dp/B09Z61114...
5a 30v Benchtop Power supply
www.amazon.co.uk/dp/B0BTDH41Y...
22awg single core wire
www.ebay.co.uk/itm/1450858449...
Crimp Terminals
www.amazon.co.uk/Taiss-Connec...
Heat Shrink Tubing
www.amazon.co.uk/Eventronic-E...
Self Tapping Metal Screws
www.amazon.co.uk/FandWay-Dril...

Пікірлер: 13

  • @OMEGOOLIEBIRD
    @OMEGOOLIEBIRD2 ай бұрын

    Thanks so much for this, I have just bought 2x of them.. it will be a horrific feeling hacking into them before I have even used them, but better that than damage the cells with poor balance on the first charge! Mine will be under the van, so I will have to seal them with silicone when putting them back together! I will run the balancer switch into the van, so I can access it. I will also run a balance lead out of the pack into the van so I can actually monitor the cells when needed. I fly RC planes, and in the RC hobby, with mostly lithium batteries being used, we have little things you can plug into a balance lead to quickly read the voltage of each cell and the total voltage.

  • @meerkatfilmsuk

    @meerkatfilmsuk

    2 ай бұрын

    That's a great idea to have the balancer switch and cell voltages on a remote loom! I feel your pain opening a new battery, but I don't regret it at all, they have been perfect since doing this. Good Luck!

  • @OMEGOOLIEBIRD

    @OMEGOOLIEBIRD

    2 ай бұрын

    @@meerkatfilmsuk I really appreciate your effort in making the video, it is a fantastic resource for the rest of us! Thank you!

  • @Kehoe-ge4iq
    @Kehoe-ge4iq3 ай бұрын

    Sadly a little late for that! I think the on/off switch might be a giveaway... that and the fact that's its nicely balanced now...

  • @Kehoe-ge4iq
    @Kehoe-ge4iq4 ай бұрын

    This is amazing! Thank you for this. My 5 month old exact battery won’t show higher that 13.29 volts after sitting for days and days on small ac powered automatic lip04 charger. Do you have a recommendation on a bench top power supply?

  • @Allaboutcampers123

    @Allaboutcampers123

    4 ай бұрын

    You may have the same problem, I think it's common on these lifepo4 batteries. I have the cheapest amazon 5amp benchtop. I would recommend getting a better one, with 10amps and 2 decimal places for voltage. So you can be more precise. Good luck with the repair!

  • @Kehoe-ge4iq

    @Kehoe-ge4iq

    3 ай бұрын

    Finished the mod last night. The balancer has done an excellent job! Just a quick question, is there any issue with the balancer being on when the battery is back in the truck camper system while hooked up to the solar charge controller and the inverter charger?

  • @Kehoe-ge4iq

    @Kehoe-ge4iq

    3 ай бұрын

    Also, what hoops did you have jump thru to get renogy to send you a new one?

  • @meerkatfilmsuk

    @meerkatfilmsuk

    3 ай бұрын

    There's no problem with the balancer being on while the battery is being charged from solar. I generally switch my balancer off and only stick it on from time to time but I know some people have it active all the time and I don't think it causes any issues.@@Kehoe-ge4iq

  • @meerkatfilmsuk

    @meerkatfilmsuk

    3 ай бұрын

    they made me make a video showing it not charging properly, obviously you'd need to do this before modding it!@@Kehoe-ge4iq

  • @Kehoe-ge4iq
    @Kehoe-ge4iq3 ай бұрын

    Sadly a little late for that! I think the on/off switch might be a giveaway... that and the fact that's its nicely balanced now...