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EVDRIVER
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Re: Quick, No Tool, Access to Emergency Battery Disconnect

Mon Oct 31, 2011 11:23 pm

This is a bit pointless and actually more dangerous. In an accident the battery contractor opens containing ALL HV to the inside of the pack which is why there is no need for easy access to this area. If for some reason the pack were damaged it would be even more dangerous. Clearly Nissan does not want people easily messing with this while the car is in motion. I would not doubt it is listed in the first responders guide but that would purely be for liability. The likely hood of shock in an EV accident is extremely low and access to this is not going to make a difference. This connection splits the pack in half lowering the voltage.

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TonyWilliams
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Re: Quick, No Tool, Access to Emergency Battery Disconnect

Tue Nov 01, 2011 12:06 am

EVDRIVER wrote:....Clearly Nissan does not want people easily messing with this while the car is in motion. I would not doubt it is listed in the first responders guide but that would purely be for liability... This connection splits the pack in half lowering the voltage.


Interesting perspective. I'm not sure where the concept of "messing with this while in motion" even entered the equation (surely, I could "mess with it" with a 10mm wrench just about as easily).

Here's what the service manual says about this switch:

Service Plug
• The service plug is included in the Li-ion battery to securely dis- connect the high voltage during high voltage part inspection and maintenance.
• The service plug is installed on the upper surface of the battery pack. The plug can be removed when the leg-room mounted ser- vice plug cover is removed.
• Always use insulating protective equipment when removing and installing service plug.

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EVDRIVER
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Re: Quick, No Tool, Access to Emergency Battery Disconnect

Tue Nov 01, 2011 12:17 am

Yes it's for service so there is no need for thumb screws. If one had kids they would surely find a way to open it when the car is moving.

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TonyWilliams
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Re: Quick, No Tool, Access to Emergency Battery Disconnect

Tue Nov 01, 2011 12:41 am

EMERGENCY SHUT-OFF SYSTEM
The emergency shut-off system is activated and the high-voltage system automatically turns off in the following conditions:
- Front and side collisions in which the air bags are deployed.
- Certain rear collisions.
- Certain EV (Electric Vehicle) system malfunc-tions

For the above collisions and the certain EV (Electric Vehicle) system malfunctions, the READY to drive indicator light will turn off. See “Warning/indicator lights and audible remin- ders” in the “2. Instruments and controls” section.

The emergency shut-off activates for the above collisions to minimize risk of an event that could cause injury or an accident. If the emergency shut-off system activates, the EV system may not switched to READY to drive position, contact a NISSAN certified LEAF dealer. Even if the power switch is switched to READY to drive position, the system may shut-off suddenly. Therefore, drive cautiously to the nearest NISSAN certified LEAF dealer or contact a NISSAN certified LEAF dealer as soon as possible.

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Ingineer
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Re: Quick, No Tool, Access to Emergency Battery Disconnect

Tue Nov 01, 2011 12:46 am

For the curious: (Disclaimer: DANGER HIGH VOLTAGE - DON'T IF YOU AREN'T QUALIFIED!)

What's under the cover:
Image

Almost identical to a Prius service plug, only larger, it's a disconnect and fuse assembly. It electrically breaks the pack into halves.

Unplugged!
Image

Image

Here's the 225A fuse inside:
Image

-Phil
Easily Learn Electricity HERE! - - - - Website: http://evseupgrade.com/ - - - - Like us on Facebook: EVSE Upgrade

Herm
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Re: Quick, No Tool, Access to Emergency Battery Disconnect

Tue Nov 01, 2011 1:46 am

Humm, an easy place to measure pack current and half voltage.. PHIL!!!

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Ingineer
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Re: Quick, No Tool, Access to Emergency Battery Disconnect

Tue Nov 01, 2011 8:45 am

Herm wrote:Humm, an easy place to measure pack current and half voltage.. PHIL!!!
I do not recommend this. The best way is via the CAN bus, as the car has already instrumented well for these metrics.

-Phil
Easily Learn Electricity HERE! - - - - Website: http://evseupgrade.com/ - - - - Like us on Facebook: EVSE Upgrade

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garygid
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Re: Quick, No Tool, Access to Emergency Battery Disconnect

Tue Nov 01, 2011 8:48 am

I agree, Pack Voltage and Amps seem to be available on the EV-CAN bus.
At least, that is where the SOC-Meter gets that information to display.
See SOC/GID-Meter and CAN-Do Info
2011 LEAF, sold in 2015
2010 Prius, 2014 silver Tesla S
Nissan EVSE, mod to 240/120v 16A
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

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TonyWilliams
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Re: Quick, No Tool, Access to Emergency Battery Disconnect

Tue Nov 01, 2011 9:00 am

Ingineer wrote:
Herm wrote:Humm, an easy place to measure pack current and half voltage.. PHIL!!!
I do not recommend this. The best way is via the CAN bus, as the car has already instrumented well for these metrics.

-Phil


Ok, new possibility.... WELDING !!! Pop out big, fat fuse, insert two cables, and do welding, Mad Max style.

<<<<<----- Yes, KIDDING... DON'T TRY THIS AT HOME.

GPowers
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Re: Quick, No Tool, Access to Emergency Battery Disconnect

Tue Nov 01, 2011 9:36 am

Ingineer wrote:For the curious: (Disclaimer: DANGER HIGH VOLTAGE - DON'T IF YOU AREN'T QUALIFIED!)

What's under the cover:

-Phil


Thanks for the photos and playing to our curiosity :)
Leaf Num: 7922, Silver, SL w/440 quick charge, Yuckey light cloth interior (now a nice leather), Delivered on 8/26/11

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