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GLE450 hybrid battery?!

Old Nov 23, 2019 | 01:55 AM
  #1  
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GLE450 hybrid battery?!

Hi,
As the GLE 450 has an electrical engine boost (EQ Boost). So was wondering, does it have an extra battery to store the power or is it just the regular battery under the seat? and if there is an extra battery where is it located? is it mentioned in the manual?

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Old Nov 23, 2019 | 02:24 AM
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Yes - 48V battery - and NO not user serviceable/dealer-only service
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Old Nov 23, 2019 | 09:27 AM
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Located under the rear seats.
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Old Nov 23, 2019 | 10:26 AM
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48V LIon battery location

Originally Posted by EngAziz
Hi,
As the GLE 450 has an electrical engine boost (EQ Boost). So was wondering, does it have an extra battery to store the power or is it just the regular battery under the seat? and if there is an extra battery where is it located? is it mentioned in the manual?
As Ron says, it's under the seat (not in the footwell as on the diagram). It has 0.9 kWh capacity.



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Old Nov 25, 2019 | 12:33 PM
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Thanks guys

So basically it has two batteries, one user-changeable and the other is by the dealer, and none of them is really that massive like some other hybrids, so won't be that big of an issue in few years when needed to be changed.

I'm asking as I was researching hybrid cars and the effect of high or low temperature on them (which isn't good on the batteries), thus batteries that are inside the car are better than the ones outside as it gets affected by the weather more.

FYI: Tempretuers here in Kuwait reaches 52'c (125'f) in the shade and don't ask about under the sun. which worries me for new tech.

So really appreciate the help.





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Old Nov 27, 2019 | 11:47 AM
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HYBRID OPERATIONS

I now have about 400 miles on the car, so I have been babying it at this early stage. I am trying to figure out the operations of the electric boost function. With E-ABC we are usually driving in “curve” mode and I am seeing 1/2 a charge rate while free rolling and full charge rate while braking. I might be driving it too gently, but I have seen very little activity on the “boost” side of the gauge. In the “heads up” I have only seen a maximum of a 3/4 full battery in the meter. I assume the electric boost function will be more active as I get my “foot in it”, but should I not be seeing a higher charge level in the hybrid battery? Am I correct that the electric boost function is more active in sport and sport + modes?

I find it strange that the electric function is not more active when the car is being driven gently. It would make sense to me that the electric motor would very active in all acceleration modes, or is this a function low level of charge in the hybrid battery?

I have read how well the gas and electric propulsion have been integrated, hopefully this will be more evident once I push the car more.
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Old Nov 27, 2019 | 12:17 PM
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Originally Posted by MargarittaMB
I now have about 400 miles on the car, so I have been babying it at this early stage. I am trying to figure out the operations of the electric boost function. With E-ABC we are usually driving in “curve” mode and I am seeing 1/2 a charge rate while free rolling and full charge rate while braking. I might be driving it too gently, but I have seen very little activity on the “boost” side of the gauge. In the “heads up” I have only seen a maximum of a 3/4 full battery in the meter. I assume the electric boost function will be more active as I get my “foot in it”, but should I not be seeing a higher charge level in the hybrid battery? Am I correct that the electric boost function is more active in sport and sport + modes?

I find it strange that the electric function is not more active when the car is being driven gently. It would make sense to me that the electric motor would very active in all acceleration modes, or is this a function low level of charge in the hybrid battery?

I have read how well the gas and electric propulsion have been integrated, hopefully this will be more evident once I push the car more.
How do you monitor the battery level? i see the charge and boost gauges, but I thought that just shows adding or consuming power, and didn't think it was charge level... Thanks!
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Old Nov 27, 2019 | 12:32 PM
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Originally Posted by tommyr
How do you monitor the battery level? i see the charge and boost gauges, but I thought that just shows adding or consuming power, and didn't think it was charge level... Thanks!
I can see the charge level as bars in the left screen of my HUD. Doesn't really tell you much,though.
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Old Nov 27, 2019 | 12:37 PM
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Originally Posted by GregW / Oregon
I can see the charge level as bars in the left screen of my HUD. Doesn't really tell you much,though.
Are you sure that the 48v battery? I always thought its the cellphone signal and battery (the one at the bottom left corner of the HUD)

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Old Nov 27, 2019 | 12:51 PM
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I have been referring to the display on the lower left of the “HUD” as indicated in the attachment above. I don’t have my owner’s manual handy, do these symbols refer to something else?
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Old Nov 27, 2019 | 12:57 PM
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Originally Posted by MargarittaMB
I have been referring to the display on the lower left of the “HUD” as indicated in the attachment above. I don’t have my owner’s manual handy, do these symbols refer to something else?
Manual only stated "Lower display area" and nothing else
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Old Nov 27, 2019 | 02:03 PM
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Originally Posted by MargarittaMB
I have been referring to the display on the lower left of the “HUD” as indicated in the attachment above. I don’t have my owner’s manual handy, do these symbols refer to something else?
That’s your cell phone battery in the HUD & signal strength. The green “Ready” light in the center display is the 48 volt indicator that the charge is OK.
What you describe is normal operation of the E-Boost. It’s designed for the stop/start allowing more seamless operation and to smooth out turbo lag by providing supplemental power under acceleration. The 48 is too small to operate like a true Hybrid, not its purpose.
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Old Nov 27, 2019 | 02:52 PM
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I am probably being too easy on it as I have not seen more than a half bar of boost yet.
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Old Nov 27, 2019 | 02:54 PM
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Thanks for clarification on the “HUD”
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Old Nov 27, 2019 | 05:52 PM
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Originally Posted by MargarittaMB
I am probably being too easy on it as I have not seen more than a half bar of boost yet.
It charges when you are moving and take your foot off accelerator.
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Old Nov 27, 2019 | 08:57 PM
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Anyone know what is the life expectancy of the 48V 0.9KWH battery and how much it costs to replace? Seems like a 500 cycle (typical LiOn battery) would be used up very quickly given the AC and other things are all running off the 48V system. I'd expect many charge/drain cycle equivalent in a typical day.
0.9KWH isn't a huge battery, A long stop light on a hot day with the AC blasting will do a good job draining it (not to mention some lead foot starts).

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Old Nov 27, 2019 | 09:04 PM
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Originally Posted by thenew3
Anyone know what is the life expectancy of the 48V 0.9KWH battery and how much it costs to replace? Seems like a 500 cycle (typical LiOn battery) would be used up very quickly given the AC and other things are all running off the 48V system. I'd expect many charge/drain cycle equivalent in a typical day.
0.9KWH isn't a huge battery, A long stop light on a hot day with the AC blasting will do a good job draining it (not to mention some lead foot starts).
probably way more than 500 cycles for Auto quality. Here’s a news feed for Tesla;
Tesla expects them to last at least 8 years and infinite miles, since that's the warranty they offer with the Model S — they define the lifetime of a battery as being when it cannot hold more than 70% of its original charge. But actual data suggests that they will last longer.
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Old Nov 27, 2019 | 09:08 PM
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Originally Posted by Ron.s
probably way more than 500 cycles for Auto quality. Here’s an news feed for Tesla;
Tesla expects them to last at least 8 years and infinite miles, since that's the warranty they offer with the Model S — they define the lifetime of a battery as being when it cannot hold more than 70% of its original charge. But actual data suggests that they will last longer.
Tesla batteries are significantly larger than 0.9kwh so you are less likely going to be going through that many cycles. assuming 300 miles per charge on a Tesla (100kwh battery), and assuming 500 cycles, that gets you 150k miles. A single strong acceleration run (say merging onto traffic on a freeway entrance) will probably drain that 0.9kwh battery thus counting as 1 cycle.

One of my friends has had the battery in his Model S and the drive motors replaced twice within 40k miles.
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Old Nov 27, 2019 | 09:46 PM
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Originally Posted by thenew3
Tesla batteries are significantly larger than 0.9kwh so you are less likely going to be going through that many cycles. assuming 300 miles per charge on a Tesla (100kwh battery), and assuming 500 cycles, that gets you 150k miles. A single strong acceleration run (say merging onto traffic on a freeway entrance) will probably drain that 0.9kwh battery thus counting as 1 cycle.
One of my friends has had the battery in his Model S and the drive motors replaced twice within 40k miles.
I have never drained my battery even after several hard acceleration runs and idling in traffic. My green “Ready’ light has never gone off, assuming that it would go off if the battery was drained. The E Boost seems to be limited to the short burst needed when accelerating as the Turbo spools up boost. Sitting at idle the engine will start after a few minutes with the air on. Playing Devil’s Advocate.....Tesla has a larger battery but runs the car all of the time so it may put more cycles on the battery. I’m not answering your original question and haven’t seen anything on battery life. I’m guessing that it will outlast the warranty though...in most cases.
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Old Nov 27, 2019 | 10:00 PM
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Originally Posted by Ron.s
I have never drained my battery even after several hard acceleration runs and idling in traffic. My green “Ready’ light has never gone off, assuming that it would go off if the battery was drained. The E Boost seems to be limited to the short burst needed when accelerating as the Turbo spools up boost. Sitting at idle the engine will start after a few minutes with the air on. Playing Devil’s Advocate.....Tesla has a larger battery but runs the car all of the time so it may put more cycles on the battery. I’m not answering your original question and haven’t seen anything on battery life. I’m guessing that it will outlast the warranty though...in most cases.
I don't think the computer will let you fully drain the battery. I don't how how much the ISG consumes, but let's assume 0.25khw to go from 0-40mph (typical around town start from stop sign/light) if you do that 4 times a day, that's 1kwh or 1 cycle of the battery. Depending on how/Where you drive, it could be significantly more than 4 times a day. On my wife's daily commute (11 miles a day) she runs into stop sign/lights 32 times. If we assume it uses 0.25kwh each time (to start the engine, assist with accelerating to speed etc), that means it would have gone through roughly 8 cycles a day. If we do the math, 8 (times a day), 5 (days a week), 44 (weeks a year) that means 1,760 cycles a year. Which is already 3x more than the typical 500 cycles of lion batteries.

So I'm concerned about the longevity of that 48V LiOn battery and cost of replacement. If we're talking about a couple hundred every other year, that's not going to bother me too much, but if we're looking at a few grand every other year, then yikes!

Sorry, waiting for my car to come in has the idle mind wondering about all kinds of things
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Old Nov 27, 2019 | 10:15 PM
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Originally Posted by thenew3
I don't think the computer will let you fully drain the battery. I don't how how much the ISG consumes, but let's assume 0.25khw to go from 0-40mph (typical around town start from stop sign/light) if you do that 4 times a day, that's 1kwh or 1 cycle of the battery. Depending on how/Where you drive, it could be significantly more than 4 times a day. On my wife's daily commute (11 miles a day) she runs into stop sign/lights 32 times. If we assume it uses 0.25kwh each time (to start the engine, assist with accelerating to speed etc), that means it would have gone through roughly 8 cycles a day. If we do the math, 8 (times a day), 5 (days a week), 44 (weeks a year) that means 1,760 cycles a year. Which is already 3x more than the typical 500 cycles of lion batteries.

So I'm concerned about the longevity of that 48V LiOn battery and cost of replacement. If we're talking about a couple hundred every other year, that's not going to bother me too much, but if we're looking at a few grand every other year, then yikes!
Sorry, waiting for my car to come in has the idle mind wondering about all kinds of things
You make a good point & it’s interesting that no one has written about it This will be a bigger issue on the GLE 53 that adds the electric Turbo to the EQ Boost.
My understanding on the Ready light is that it will go off when the battery is discharged to the %reserve limit established-a notice that it will not function for boost or start/stop. The reserve should be the limit set to keep from excess discharge and enough to start the car at least one more time. It would be nice to see a bar graph of the charge instead of the Ready light.
Maybe our resident expert Fabris can enlighten us with facts.
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Old Nov 27, 2019 | 10:22 PM
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Originally Posted by Ron.s
You make a good point & it’s interesting that no one has written about it This will be a bigger issue on the GLE 53 that adds the electric Turbo to the EQ Boost.
My understanding on the Ready light is that it will go off when the battery is discharged to the %reserve limit established-a notice that it will not function for boost or start/stop. The reserve should be the limit set to keep from excess discharge and enough to start the car at least one more time. It would be nice to see a bar graph of the charge instead of the Ready light.
Maybe our resident expert Fabris can enlighten us with facts.
It would be nice to have some indication of the SOC (State Of Charge) of that battery. I'm not too concerned about it going so low down to whatever the reserve limit is, as the computer should be monitoring and managing that. It's the frequent charge/discharge that will quickly add up. The small size of the battery doesn't help.
It doesn't matter if you do one long deep discharge down to the reserve, or many smaller discharge cycles that add up to whatever the reserve is, overall it's still going to count as 1 battery cycle.

I know someone with a Volvo XC90 T8 that is plug in hybrid with a 9.x KWH battery. They've already had the battery wear out at just over 50k miles. Granted that model actually can use the electric motor to drive the car. But I think they left it in normal/comfort mode 99% of the time and let the computer manage ICE vs EV motor and the charge cycles. Luckily they had an extended warranty that covered the replacement. Otherwise it was going to be a very expensive repair.

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Old Nov 29, 2019 | 12:33 PM
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Li-Ion battery life

Originally Posted by thenew3
I know someone with a Volvo XC90 T8 that is plug in hybrid with a 9.x KWH battery. They've already had the battery wear out at just over 50k miles. Granted that model actually can use the electric motor to drive the car. But I think they left it in normal/comfort mode 99% of the time and let the computer manage ICE vs EV motor and the charge cycles. Luckily they had an extended warranty that covered the replacement. Otherwise it was going to be a very expensive repair.
I'm surprised the warranty didn't exclude it as a "wear item."
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Old Nov 29, 2019 | 04:43 PM
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Originally Posted by GregW / Oregon
I'm surprised the warranty didn't exclude it as a "wear item."
Volvo battery warranty

Volvo covers the battery for 8 yr/100k miles or 10 yr/150k miles depending on the state you are in.

They say the battery is good for the life of the car, but of the two people I know with the T8 hybrid, both has had problems with battery and electric motors. One needed battery and motor replaced, the second only had motor replaced but now battery is acting up.

Same with Tesla. I only know a handful of folks with Tesla. Everyone of them has had to have their battery and motor replaced at least once.
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