FEH reconditioning - GreenHybrid - Hybrid Cars

FEH reconditioning

  #1  
Old 12-02-2018, 03:51 PM
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Default FEH reconditioning

See:

https://www.greenhybrid.com/forums/f...98/#post266456

The following power supplies:

https://www.mouser.com/ProductDetail/709-LPC100-350

and

https://www.mouser.com/ProductDetail/709-APC35-350

Wired with output in series and input in parallel can provide up to 386V of 350mA charging to the FEH battery. That should be more than sufficient to obtain true 100% SoC. Optimally, the pack would need to be cooled in a way that simulates its normal cooling system operation to ensure the pack doesn't overheat. If the cover is off, and a box fan is placed face down on the pack, that should be sufficient. NEVER charge to full without some form of cooling. Charging for 8 hours or less from a KNOWN EMPTY battery can be done without cooling.

Use 3 light bulbs wired in series to DISCHARGE your pack to progressively lower levels over a long period of time followed by a very long charge (25 hours).

Steps:
  1. Charge for 25 hours
  2. Discharge with 3X 100W bulbs in series to 250V, record discharge time to 300V
  3. Discharge with 3X 40W bulbs in series to 200V (swapping the bulbs will cause a voltage bounce. Normal)
  4. Charge for 25 hours*
  5. Discharge with 3X 100W bulbs in series to 250V, record discharge time to 300V
  6. Discharge with 3X 40W bulbs in series to 125V (swapping the bulbs will cause a voltage bounce. Normal)
  7. Charge for 25 hours*
  8. Discharge with 3X 100W bulbs in series to 250V, record discharge time to 300V
  9. Discharge with 3X 40W bulbs in series to 125V (swapping the bulbs will cause a voltage bounce. Normal)
  10. Charge for 25 hours*
  11. Test drive.
*charging with these power supplies from low voltage can be problematic. Since they auto-adjust voltage to regulate the 350mA current flow, they aren't often in sync. You may want to make provisions for taking the APC-35-350 out of the circuit until 286V is reached. Charge time of 25 hours is assuming 350mA of actual charge current. If you get less than that, you need to charge for longer.

A harbor freight cheapo multimeter in 10A mode in series with the charge/discharge (NOT DIRECTLY CONNECTED TO THE BATTERY TERMINALS!!!!) would allow you to compute charged/extracted capacity over time and actually estimate pack health.

The above process will take you about a week and cost you about $75. It will either work, or it won't. Consider that you will be exposing yourself to potentially lethal voltages. Do so at your own risk.

Good luck
 

Last edited by S Keith; 12-10-2018 at 05:51 AM.
  #2  
Old 12-04-2018, 10:55 PM
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Default Re: FEH reconditioning

I'm curious why you would recommend the two 120VAC chargers, rather than the 220V 150-350?
 
  #3  
Old 12-04-2018, 10:56 PM
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Default Re: FEH reconditioning

Where do you live?
 
  #4  
Old 12-04-2018, 11:49 PM
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Default Re: FEH reconditioning

San Diego
 
  #5  
Old 12-05-2018, 12:01 AM
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Default Re: FEH reconditioning

Since you are in America, you do not have access to single phase 220V, hence my recommendation.
 
  #6  
Old 12-10-2018, 04:50 AM
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Default Re: FEH reconditioning

Awesome timing. I just bought a high mileage escape hybrid and was looking for resources to build a grid charger. I've built dozens for the 1st gen Insight. That link you gave is perfect. As for battery cooling while discharging. Why not connect the built in fan to your charger with a seperate switch and 12v (guessing its 12) supply? It would allow you to install the wiring and not have to keep everything open.

Thanks for the writeup.
 
  #7  
Old 12-10-2018, 05:08 AM
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Default Re: FEH reconditioning

Because, like almost every fan besides the G1 Insight, they are PWM controlled and can't be driven simply by applying a voltage.

Cooling during discharge is not necessary. I have clarified my original post.
 
  #8  
Old 12-10-2018, 05:11 AM
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Default Re: FEH reconditioning

Originally Posted by S Keith View Post
Because, like almost every fan besides the G1 Insight, they are PWM controlled and can't be driven simply by applying a voltage.

Cooling during discharge is not necessary. I have clarified my original post.
Awesome thanks
 
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