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| Diode for charging lithium batteries necessary? |
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| Jenoin:
I have read that for charging lithium batteries using a bench power supply, that it is important to use a diode or verify that the power supply in question has means to prevent high reverse current. I am converting a a golf cart to lithium ion batteries and I am planning to charge using a Sorensen DCS 80V 13A power supply that I picked up off of eBay. It appears to me that this particular power supply has diodes built into the DC output circuit and shouldn't need any additional protection. I have attached an image of the circuit. Feel free to let me know if you disagree or agree. According to the manual, you can hook multiple power supplies of this type together in parallel for high current applications as well, which also makes me think it shouldn't need an extra output diode to prevent reverse power. I have a BMS on my battery which is a 14s 58.8V leaf derived assembly. Thanks for any assistance |
| KC0PPH:
You should not charge lithium batteries from a power supply. Either build a proper charger or buy one. I use ones from revoletrix for my Rc batteries. These batteries are no joke. |
| amyk:
--- Quote from: KC0PPH on May 07, 2019, 02:04:08 am ---You should not charge lithium batteries from a power supply. Either build a proper charger or buy one. I use ones from revoletrix for my Rc batteries. These batteries are no joke. --- End quote --- A lion charger is a power supply. The only important things are voltage and current, as long as you keep those within the limits the battery will charge just fine. (Dave himself has done a video on this.) |
| KC0PPH:
A power supply that monitors individual cell voltages, provides over voltage protection and can follow the correct charge curve. As I said build a correct one or buy one. Your an idiot if you think you can charge a multicell lithium battery with just a power supply. |
| KC0PPH:
Is the BMS a Battery Management System? If so look up to see if it handles the charging of the batteries and you just have to supply it with a fixed voltage? It is common for chargers to require a DC supply. My Revo requires a 12-24V DC power supply and will charge up to 8s packs. (BuckBoost Converter) |
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