battery not charging fully?

cfhmachado · 10-11-2009, 06:28 PM

i recently purchased a used 06 prius with 59,000mi and noticed the batterys never fully charge. The most ive driven it has been about 60mi at once but still the batterys never come to a full charge, maybe 3/4. I have driven another one in the past, and it seems like it became fully charged after a few miles of driving. Any thoughts?

kenoarto · 10-11-2009, 06:37 PM

Your Prius is performing correctly. It's only your memory that is malfunctioning! When you search this forum using the term "battery" you will find several threads that go into great detail to explain why the Prius is designed to stay about 2/3 charged.

cfhmachado · 10-11-2009, 06:39 PM

It may be my memory, nicely put.

qbee42 · 10-11-2009, 11:03 PM

Quote:

Originally Posted by cfhmachado

It may be my memory, nicely put.

I can charge to the high limit (full bars on the display), but the control system tries to keep the charge at about 2/3rds.

Tom

Felt · 10-11-2009, 11:15 PM

I have read that the Prius computer manages the battery charge, keeping the charge between 40% and 80%. The purpose of which is to prolong the traction battery life.

I live in the mountains, and on long downhills the battery will register a full charge.

cfhmachado · 10-12-2009, 12:29 AM

Quote:

Originally Posted by Felt

I have read that the Prius computer manages the battery charge, keeping the charge between 40% and 80%. The purpose of which is to prolong the traction battery life.

I live in the mountains, and on long downhills the battery will register a full charge.

When i had first driven a prius it was in northern california in the sierras, and it did the same thing(full charge). But i live now in SE new mexico where there are very few ant hills , so it only gets to that 40-80%.

ken1784 · 10-12-2009, 01:08 AM

Following is a copy of my post at Gen III forum.
The control target is 60% SOC.
-----
As everybody wrote, Prius is trying to keep the charge level to the target SOC (state of charge).
So, it does not want to be full.

Ken@Japan

10-11-2009, 06:28 PM	#1
cfhmachado Junior Member Join Date: Oct 2009 Location: nm Posts: 3 My Car: 2006 Prius Model: N/A Package: #5 Touring Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	battery not charging fully? i recently purchased a used 06 prius with 59,000mi and noticed the batterys never fully charge. The most ive driven it has been about 60mi at once but still the batterys never come to a full charge, maybe 3/4. I have driven another one in the past, and it seems like it became fully charged after a few miles of driving. Any thoughts?

10-11-2009, 06:37 PM	#2
kenoarto Senior Member Join Date: Feb 2006 Location: Chicago, IL Posts: 117 My Car: Model: Package: Thanks: 2 Thanked 9 Times in 4 Posts Friends: 1	Re: battery not charging fully? Your Prius is performing correctly. It's only your memory that is malfunctioning! When you search this forum using the term "battery" you will find several threads that go into great detail to explain why the Prius is designed to stay about 2/3 charged.

10-11-2009, 06:39 PM	#3
cfhmachado Junior Member Join Date: Oct 2009 Location: nm Posts: 3 My Car: 2006 Prius Model: N/A Package: #5 Touring Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	Re: battery not charging fully? It may be my memory, nicely put.

10-11-2009, 11:15 PM	#5
Felt Senior Member Join Date: Jul 2009 Location: Northern Utah Posts: 111 My Car: 2010 Prius Model: IV Package: Navigation Thanks: 5 Thanked 12 Times in 11 Posts Friends: 0	Re: battery not charging fully? I have read that the Prius computer manages the battery charge, keeping the charge between 40% and 80%. The purpose of which is to prolong the traction battery life. I live in the mountains, and on long downhills the battery will register a full charge.

10-12-2009, 01:08 AM	#7
ken1784 SuperMID designer Join Date: Dec 2003 Location: Yokohama, JAPAN Posts: 1,991 My Car: 2010 Prius Model: N/A Package: G Thanks: 10 Thanked 273 Times in 125 Posts Friends: 8	Re: battery not charging fully? Following is a copy of my post at Gen III forum. The control target is 60% SOC. ----- As everybody wrote, Prius is trying to keep the charge level to the target SOC (state of charge). So, it does not want to be full. Ken@Japan

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
battery never fully charged - 8 bars	cajunejacz24	Gen III 2010 Prius Main Forum	16	08-10-2009 11:08 PM
Is My Battery Not Charging Fully?	bpollard	Gen III 2010 Prius Main Forum	10	07-23-2009 09:53 AM
motor kick in when the battery is fully charge	hc167	Gen II Prius Care, Maintenance and Troubleshooting	6	03-25-2009 03:58 PM
Fully charged battery?	nooaah	Gen II Prius Technical Discussion	6	11-30-2008 09:23 PM
Battery in the MFD display never gets fully charged?	BoisePrius	Gen II Prius Main Forum	6	04-10-2008 10:47 AM