Electrophoresis Box for Grid Charging - 2005 Civic Hybrid

  #1  
Old 04-29-2019, 11:24 PM
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Default Electrophoresis Box for Grid Charging - 2005 Civic Hybrid

Well gents after way too much research and not wanting/having $200 to $300 to spend on an ebay grid charger I picked up an electrophoresis unit off of eBay. So I ran some wires through the trunk and connected them to the battery. All great at this point except that for my "harness" I did not install a diode thinking I might want to also do a full discharge as part of my attempt at restoring my sons 2005 Civic Hybrid performance. Of course the trick is that now you have these wires in your son's trunk with 170 volts on them waiting to discharge on something. I've already devised some slip on protectors to use when not charging but he still has to touch them when connecting to the charger(banana leads). My other concern is the 1 to 2 inch sparks that go flying when I connect the charging harness positive lead to the eletrophoresis unit(yes the unit is powered off when I am connecting).

In addition after a brief 7 hour overnight charge at 300 ma I noted today that the side airbags light is now coming on almost in perfect synch with the Green charge bars coming and going.
 
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Old 04-30-2019, 12:27 AM
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Default Re: Electrophoresis Box for Grid Charging - 2005 Civic Hybrid

Charging for any length of time without battery cooling is a perfect way to destroy the pack.

Most electrophoresis units are not equipped to be used with anything but a simple resistive load. NOT having a diode in the line is likely going to destroy the unit (with this "1 to 2 inch sparks that go flying").
 
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Old 04-30-2019, 09:17 AM
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Default Re: Electrophoresis Box for Grid Charging - 2005 Civic Hybrid

S. Keith:

Thanks for the input. The pack was at 160 volts when I connected the charger. For all your aforementioned reasons I won't be attempting any further charging until I can get a 12 volt supply connected to the fan.
 
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Old 04-30-2019, 09:28 AM
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Default Re: Electrophoresis Box for Grid Charging - 2005 Civic Hybrid

You will need a 12V/10A supply and a PWM controller. You can't just force the fan to run by applying 12V to the (+) and (-). You can short the PWM wire to ground to run the fan at full blast, but some have reported this to be a permanent change, i.e., the fan runs full blast even after the harness is disconnected.

Search this site. Someone recently found a suitable controller.

Alternatively, you could put a 10A charger on the 12V and turn the car's ignition ON (engine off). The car will manage the battery temperature as needed.
 
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Old 04-30-2019, 02:18 PM
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Default Re: Electrophoresis Box for Grid Charging - 2005 Civic Hybrid

Originally Posted by mr1997 View Post
Well gents after way too much research and not wanting/having $200 to $300 to spend on an ebay grid charger I picked up an electrophoresis unit off of eBay. So I ran some wires through the trunk and connected them to the battery. All great at this point except that for my "harness" I did not install a diode thinking I might want to also do a full discharge as part of my attempt at restoring my sons 2005 Civic Hybrid performance. Of course the trick is that now you have these wires in your son's trunk with 170 volts on them waiting to discharge on something. I've already devised some slip on protectors to use when not charging but he still has to touch them when connecting to the charger(banana leads). My other concern is the 1 to 2 inch sparks that go flying when I connect the charging harness positive lead to the eletrophoresis unit(yes the unit is powered off when I am connecting).
Put a >200V diode in the positive lead at the power supply so that current will only flow out of it. When you attach the leads the diode will prevent any current from flowing into the power supply, because said current could damage it.

You should not see sparks at all, let alone 1 to 2 inch ones. A spark like that at connection (when the wires draw close together) implies an impossibly high voltage for the battery, in the many kV range:

https://hackaday.com/2016/12/08/meas...-probe-tricks/

It is possible to get sparks that long when breaking a connection if there are large inductors (coils) in the circuit.

I used an electrophoresis power supply and it was very unstable when attached directly to the battery. They are designed for resistive loads, not loads which are in any way reactive. Placing a 30 ohm drop resistor with a big heat sink on it in series with the battery resulted in a 10V drop across that resistor and stabilized the power supply. This is described somewhere in a series of posts I made on InsightCentral.net

Originally Posted by mr1997 View Post
In addition after a brief 7 hour overnight charge at 300 ma I noted today that the side airbags light is now coming on almost in perfect synch with the Green charge bars coming and going.
If you really saw sparks as large as you indicated it could easily have fried any number of components. That said, I think it is more likely that you now have a short between the car's frame and the battery ground. Normally the battery is floating with respect to the car frame. Probably your harness is now grounding it to the frame, intentionally or otherwise. You will want to fix that ASAP. Be extremely careful, if that is the situation and one hand is on the frame and the other comes near the positive side of the battery you could receive a lethal shock.
 
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