Bosch battery recharge cycles

sjpt

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Jun 8, 2018
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Is the Bosch system really stupid enough that I need to go to a service agent to find the number of recharge cycles on a battery? I hope not, but can't see how to find it on the Intuvia display. If so, is this because of bad design or cynical lock-in?
 

Nealh

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Aug 7, 2014
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It's by design and not fault, just like their batteries and all else Bosch a closed locked in market.
No third party or after market mods to tamper so you are reliant on dealers.
 

Gubbins

Esteemed Pedelecer
Yep, been there and done that, although in my case and having bought a few bikes from my prefered dealer they were always happy to do small things like this as part of their aftersales service.....And lets not beat about the bush here.. It is a very small thing that takes little time and effort.
 

sjpt

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Jun 8, 2018
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Thanks for the reply; pretty much as I expected. Alas, my wife's bike is 25 years old and mine 15 and I do our own repairs, so I don't have that much of a relationship with the local bike shops. I'll ask them anyway; they are friendly. (the Bosch dealer map doesn't know they moved 5 years ago).

I can see the full discharge test is beyond what the Intuvia display might be able to show, but it seems absurd it can't show battery recharge cycles; that is something any user will want to keep in mind. Also I see that firmware upgrades need to go back to the dealer

Recently bought a second hand Motus from a bike shop that is not close enough to drop back to for minor things. They promised a battery report, but I stupidly forgot to get it when I got the bike.
 
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Gubbins

Esteemed Pedelecer
Thanks for the reply; pretty much as I expected. Alas, my wife's bike is 25 years old and mine 15 and I do our own repairs, so I don't have that much of a relationship with the local bike shops. I'll ask them anyway; they are friendly. (the Bosch dealer map doesn't know they moved 5 years ago).

I can see the full discharge test is beyond what the Intuvia display might be able to show, but it seems absurd it can't show battery recharge cycles; that is something any user will want to keep in mind. Also I see that firmware upgrades need to go back to the dealer

Recently bought a second hand Motus from a bike shop that is not close enough to drop back to for minor things. They promised a battery report, but I stupidly forgot to get it when I got the bike.
When I was selling one I took it in for a battery charge cycle report which added up all the part charges to complete cycles and they emailed it to me.. worth a phone call?
 

sjpt

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Jun 8, 2018
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Yes, thanks; I'll try the local shop and see what they can do. I still think it absurd that the recycle count isn't something that is just available of the display. The display is in touch with the battery anyway for other details.
 

wheeliepete

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Feb 28, 2016
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Why would Bosch include it when it's another opportunity for their dealers to make money? Unless you are planning on selling the bike, I wouldn't get too hung up on the number of charge cycles. The battery is going to deteriorate over time regardless of whether you know or not. Bosch batteries seem to have a reasonable life span, so you can make an educated guess by the age,mileage and range of the bike. I certainly wouldn't pay to find out, put the money in your re-cell fund.
 

zakventis

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Aug 28, 2017
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Is the Bosch system really stupid enough that I need to go to a service agent to find the number of recharge cycles on a battery? I hope not, but can't see how to find it on the Intuvia display. If so, is this because of bad design or cynical lock-in?
I have had my Trek/Performance CX/500W/Intuvia bike for 18 months now. Shortly after taking delivery, with a fully charged battery, I rode a 10 mile circuit. I then recorded the power consumed (24 miles of a theoretical 103 miles on Eco - having first reset the range).
10 / 24 x 103 = 43 miles - the theoretical maximum range on a fully charged battery. Many rides since then have proved that figure to be pretty accurate - in hilly Wales I actually get about 42 miles from a full charge.

Every 6 months I carry out the same calculation. After one year it was 40 miles but at 18 months the calculation had dropped to 34 miles and so I set out on a longer ride to check it. After 35.35 miles, less than a mile from home, the system shut down! So again, the calculation proved to be pretty accurate.

It represents a 16% loss of capacity over 18 months/6,000 miles. If that rate of loss is linear it should take about 4 years to to reach the 60% capacity Bosch guarantee after 2 years which would still get me about 25 miles range. That's reasonable, I reckon.

Well, that's my (nerdy) way of doing it!

Also... In all that time the Bosch motor has performed faultlessly, only requiring the motor mount nuts/torx to be tightened to stop it creaking. And the rest of the bike is still good - one rear wheel bearing replaced, plus, of course, chains, drive rings and cassette.
 

Fat Rat

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Jun 7, 2018
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I wouldn't get too hung up on the number of charge cycles. The battery is going to deteriorate over time regardless of whether you know or not
I certainly wouldn't pay to find out,
Definitely the above

Just ride the thing and enjoy it :)
 

sjpt

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Jun 8, 2018
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Yes, I am just enjoying it. The reason I was interested was the bike was 2nd hand with claimed low mileage, but I was getting less out of the battery than I was expecting so I was a little suspicious. Too late to do anything about it now anyway.
 

Nev

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May 1, 2018
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If that rate of loss is linear it should take about 4 years to to reach the 60% capacity Bosch guarantee after 2 years which would still get me about 25 miles range. [/ QUOTE]

I am not sure about this. Using your figures the rate of loss does not appear to be linear it seems to be increasing.

In the first 12 months it has dropped by only 3 miles ( from 43 down to 40 miles). In the next 6 months however it has dropped by 6 miles (from 40 down to 34). That's a substantial increase in the loss of range in the last 6 months compared to the first 12 months.

I don't know if the battery will continue to increase its rate of loss, hopefully someone reading this will reply and let us know.
 

Nev

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May 1, 2018
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Zakventis, I tried to reply to your post using the quotes function but messed it up some how or other, this is what I was trying to post.

I am not sure if the rate of loss is linear . Using your figures the rate of loss appears to be increasing.

In the first 12 months it has dropped by only 3 miles ( from 43 down to 40 miles). In the next 6 months however it has dropped by 6 miles (from 40 down to 34). That's a substantial increase in the loss of range in the last 6 months compared to the first 12 months.

If we were to split the 3 miles loss of range in the first 12 months in half and say it lost 1.5 miles in the first 6 months and another 1.5 miles in the next 6 month period.

Then the 6 miles lost in the last 6 months is 4 times larger than the previous 6 monthly loss.

I don't know if the battery will continue to increase its rate of loss, hopefully someone reading this will reply and let us know.