2nd Nimh battery pack

[toyotechwv]

I'm sure it's on here somewhere, has anyone added a 2nd OEM HV battery pack to the Prius? If so can you steer me to some info? Thanks.

[efusco]

Check out cal-cars web site: California Cars Initiative for Plug-In Hybrids
Check you the Yahoo! tech forum: Prius_Technical_Stuff : To discuss the unique interface and poss

You should be able to find the info you need to decide if you want to proceed and to get you started.

[grizzly1]

Originally Posted by efusco

Check out cal-cars web site: California Cars Initiative for Plug-In Hybrids
Check you the Yahoo! tech forum: Prius_Technical_Stuff : To discuss the unique interface and poss

You should be able to find the info you need to decide if you want to proceed and to get you started.

Hey Efusco,I have been looking for the same info, those links are of no help as they only disscuss there battery conversions,we both want any info that talks about adding another Toyota pack to the original pack ,what would you gain in MPG?
Thanks
Harry

[efusco]

Originally Posted by grizzly1

Hey Efusco,I have been looking for the same info, those links are of no help as they only disscuss there battery conversions,we both want any info that talks about adding another Toyota pack to the original pack ,what would you gain in MPG?
Thanks
Harry

MPG gain is nominal, but there would be some. If you're looking for a cookbook with adding a 2nd OEM pack I don't think you'll find it. Those links are not "useless" if you have any idea what you're doing from a technical stand point. Everything you need to know about adding additional battery capacity of almost any type can be gleened from those sites. If you can't learn all you want from either the existing information there or by asking the appropriate questions then this is probably not a project you should risk taking on. Mistakes can lead to fire, damage to the car, damage to the existing battery, or even your death.

[bedrock8x]

There is no improvement in mpg by adding another Toyota pack to double the capacity because the energy to charge the packs comes from the gas. The existing pack's capacity is already optimized for FE and cost.
To improve mpg the only method is to do the conversion to a plug-in.

[toyotechwv]

Originally Posted by bedrock8x

There is no improvement in mpg by adding another Toyota pack to double the capacity because the energy to charge the packs comes from the gas. The existing pack's capacity is already optimized for FE and cost.
To improve mpg the only method is to do the conversion to a plug-in.

I'm more interested in an increase in system power for acceleration not MPG's. I figured this would be the most cost effective way to do so with this car.

Will be spending much time reviewing those sights, lots of info.

[efusco]

Originally Posted by bedrock8x

There is no improvement in mpg by adding another Toyota pack to double the capacity because the energy to charge the packs comes from the gas. The existing pack's capacity is already optimized for FE and cost.
To improve mpg the only method is to do the conversion to a plug-in.

While that may seem logical, it's not consistent with evidence and experience from the many who've added capacity...Wayne Brown foremost amongst them. He experienced approximately 10% bump in FE (city and hwy) with the added capacity.

[SageBrush]

Originally Posted by toyotechwv

I'm more interested in an increase in system power for acceleration not MPG's. I figured this would be the most cost effective way to do so with this car.

Will be spending much time reviewing those sights, lots of info.

Overall expect not. Capacity != power. Since the battery's power is dependent on SOC you will extend the maximal time you can pull ~ 20 kW, but you will not exceed that power rating. Somewhere overheating is going to limit things too.

[Flying White Dutchman]

have a look here

http://priuschat.com/forums/prius-mo...ristol-uk.html

[ken1784]

Originally Posted by toyotechwv

I'm more interested in an increase in system power for acceleration not MPG's. I figured this would be the most cost effective way to do so with this car.

If you had enough technical ability to hack the Hybrid ECU, the Battery ECU, the communication protocol and etc, you'll see 100kW(136PS) max system power plus 100km/h speed by EV only like following plug-in prototype.
Toyota Plug-in Hybrid information

Ken@Japan