07-09-2020, 12:15 PM | #11 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
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Re: Failed Lithium project
hiway44, I am guessing that charger was setup for a 16 LiFePO4 pack, You may want to call them and ask how to adjust the output voltage.
Until You get the PC board removed it will be hard to tell if You have a current limiting path in the pack. PingEye3, that diagram is missing the Controller LV and HV disabling setup. |
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07-09-2020, 01:06 PM | #12 | |
Gone Wild
Join Date: Sep 2014
Location: Orlando, FL
Posts: 1,308
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Re: Failed Lithium project
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07-09-2020, 01:19 PM | #13 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
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Re: Failed Lithium project
My concern is someone will use the diagram as is without realizing it is not providing LV or HV cell protection while driving or during Regen (if applicable).
I know you understand all this, but lot of users will not realize that is the case. |
07-09-2020, 01:28 PM | #14 | |
Gone Wild
Join Date: Sep 2014
Location: Orlando, FL
Posts: 1,308
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Re: Failed Lithium project
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07-09-2020, 01:50 PM | #15 |
Not Yet Wild
Join Date: Sep 2019
Posts: 34
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Re: Failed Lithium project
I just got off the phone with T.Direct. My power pack needed to be adjusted and wasn't. I have it now adjusted to 58.1 volts. I was transfer twice prior to getting somebody who knew what I was talking about.
I am sure its the PC Board causing the problem with the voltage drop. I cannot wait until my busbars arrive. Thank you all for being so kind and helpful! Steve Jefferies |
07-09-2020, 08:47 PM | #16 |
Not Yet Wild
Join Date: Sep 2019
Posts: 34
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Re: Failed Lithium project
Is this normal? First full charge I was able to get it to 57.8 volts. The charger was set to 58.0 / 58.1 I have been pulling 225 to 250 amps while riding around in the yard at times.
I think the lag and lost of volts was due to the PC Board. Once I get the busbars I should have a better connection with a solid connection. I can also adjust the controller more if needed. Thanks. |
07-09-2020, 10:24 PM | #17 |
Getting Wild
Join Date: Dec 2018
Location: Music City USA
Posts: 149
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Re: Failed Lithium project
Glad this is working out for you. Your cart looks great. I love reading about others experiences. I have learned a lot reading all the different ways to make improvements in our carts. Good luck with the rest of your build.
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07-11-2020, 11:53 AM | #18 | |
Gone Wild
Join Date: Sep 2014
Location: Orlando, FL
Posts: 1,308
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Re: Failed Lithium project
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07-11-2020, 12:17 PM | #19 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
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Re: Failed Lithium project
PingEye3, I am not try to slam anything, How does the BMS stop the battery drain if a cell goes under or over voltage while driving?
You must have some other circuit not shown in that drawing for pack protection while motoring, all that drawing shows is how the BMS protects the pack while charging. Am I missing something? |
07-11-2020, 02:38 PM | #20 |
Gone Wild
Join Date: Apr 2017
Location: SE TN
Posts: 2,226
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Re: Failed Lithium project
Ping Eye3, You can add my pingeye3 clone to that list of success builds. Sergio, in pingeye3's build the charging circuit goes through the BMS. If the BMS detects an overvoltage it shuts down the charging circuit and the 48v's to the accessory 48-12v converter. This will remove power from the relay you add to lock out the cart. The LV, over/under temperature is tied in with the same circuit that the lock button uses on the bluetooth interface.
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