Bosch battery readouts.

[Andy McNish]

The one thing I find most frustrating about the Bosch system is the battery remaining charge readouts on their controllers and the battery itself.

First of all I don't understand why it simply cant be expressed as a %, as every smartphone battery has been for years, for example. 20% chunks really are too big especially once the battery gets down below 40%. With one bar showing I might have enough battery power to do a 30km flat ride on Eco or I might run out in ten yards time...

Secondly it is apparent to me, now I am doing a consistent commmute, that the 5 bars on my 500W/hr battery do not represent 100W each.

Two days ago I set off with a full battery (100%).
It dropped to 4 bars (nominally 80%) after 32km (mostly on Tour with a little Eco).

This morning I had 3 bars showing when I set off of the same route, done in the same time, in the same conditions (maybe a little warmer ambient temperature) and with the same boost.

So I had on the face of it at least 40% battery left when I set out this morning. But by the time I had done 20km it had dropped under 20% (i.e. gone down to one bar). Perhaps small differences in a ride might have accounted for a few %, but basically it looks to me like the 100-80% bar on the Bosch display in fact reflects 50% more Watts than the 40-20% one. I'll probaby get close to ending the commute tonight at 0%, so I'll keep an eye out to see if the drop off continues.

Is this a known issue?

 

[soundwave]

as you can see it is all over the place problem is it try to guess what range is left depending how you ride the bike and what mode was last used and it is just crap lol.

 

[Artstu]

View attachment 30568View attachment 30569

as you can see it is all over the place problem is it try to guess what range is left depending how you ride the bike and what mode was last used and it is just crap lol.

Yes but that's the difference between eco and turbo, nothing to do with the thrust of this thread.

 

[Fishy]

Quote

"Secondly it is apparent to me, now I am doing a consistent commmute, that the 5 bars on my 500W/hr battery do not represent 100W each."

All batteries are like this, 100% to 50%, is not the same as 50% to 0%.

 

[soundwave]

Yes but that's the difference between eco and turbo, nothing to do with the thrust of this thread.

err i get more than 6 miles in turbo with a full batt lol

 

[Artstu]

I just want to say I feel a whole lot better about the range on my 6 year old Bosch classic, was having range envy for the briefest of moments.

 

[Deleted member 25121]

The one thing I find most frustrating about the Bosch system is the battery remaining charge readouts on their controllers and the battery itself.

First of all I don't understand why it simply cant be expressed as a %, as every smartphone battery has been for years, for example. 20% chunks really are too big especially once the battery gets down below 40%. With one bar showing I might have enough battery power to do a 30km flat ride on Eco or I might run out in ten yards time...

Secondly it is apparent to me, now I am doing a consistent commmute, that the 5 bars on my 500W/hr battery do not represent 100W each.

Two days ago I set off with a full battery (100%).
It dropped to 4 bars (nominally 80%) after 32km (mostly on Tour with a little Eco).

This morning I had 3 bars showing when I set off of the same route, done in the same time, in the same conditions (maybe a little warmer ambient temperature) and with the same boost.

So I had on the face of it at least 40% battery left when I set out this morning. But by the time I had done 20km it had dropped under 20% (i.e. gone down to one bar). Perhaps small differences in a ride might have accounted for a few %, but basically it looks to me like the 100-80% bar on the Bosch display in fact reflects 50% more Watts than the 40-20% one. I'll probaby get close to ending the commute tonight at 0%, so I'll keep an eye out to see if the drop off continues.

Is this a known issue?

Basically the resolution of the display method is very poor with just 5 bars.
For example, with the 3rd bar displayed the available charge could be anything between 60% and 41% and with the 2nd bar displayed the charge could be anything between 40% and 21%. So if you start a journey with the 3rd bar showing and finish with the 2nd bar showing (and it could have been showing for a while) you could have used anything between 60%-21%=39% and 41%-40%=1% of charge.

It's only displaying an estimate of charge available and the accuracy will depend on temperature, age of batteries, assistance level, terrain etc etc but the poor resolution of the 5 bar display is the biggest limitation.

My Bosch Kiox display shows numerically the estimated distance left with a resolution of 1 km or mile and charge left with a resolution of 1%, this seems to work very well.

 

[Artstu]

My Bosch Kiox display shows numerically the estimated distance left with a resolution of 1 km or mile, which is great.

I never ever use the range feature, but the battery indicator looks just the job.

https://cdn.shoplightspeed.com/shops/608251/files/12404927/800x700x2/bosch-kiox-display-2019.jpg

 

[soundwave]

the app now works with kiox check other thread

 

[Andy McNish]

Yes but that's the difference between eco and turbo, nothing to do with the thrust of this thread.

Was this a mispost? It's a new thread about exactly this issue !?

 

[Andy McNish]

Basically the resolution of the display method is very poor with just 5 bars.
For example, with the 3rd bar displayed the available charge could be anything between 60% and 41% and with the 2nd bar displayed the charge could be anything between 40% and 21%. So if you start a journey with the 3rd bar showing and finish with the 2nd bar showing (and it could have been showing for a while) you could have used anything between 60%-21%=39% and 41%-40%=1% of charge.

It's only displaying an estimate of charge available and the accuracy will depend on temperature, age of batteries, assistance level, terrain etc etc but the poor resolution of the 5 bar display is the biggest limitation.

My Bosch Kiox display shows numerically the estimated distance left with a resolution of 1 km or mile and charge left with a resolution of 1%, this seems to work very well.

But the second issue makes the first one worse
Basically I have a 40km commute. With the battery full and on Tour it uses one bar + 8km.
The next day sees me down to 3 bars/nearly two.
But on the third day, with the battery at the bottom of its 3 bar reading there's a good chance it will run out before I get back home.

I mean it's not really a huge deal in the sense that that's still more or less 120km on mostly 100% boost in terms of total range. But it irritates me that the battery indicator can't be more accurate. It doesn't seem like it should be rocket science.

Why not just set it up so that the battery reading is linear to the aggregate power left? Don't smartphones manage this?

 

[Artstu]

Was this a mispost? It's a new thread about exactly this issue !?

I see no mention of the displays estimated range in your post, so SW's post is off at a tangent as they often are.

 

[soundwave]

R200

www.bosch-ebike.com

In field tests relating to the eBike range, previous results depended heavily on the rider and the external conditions. Rider weight, tyres, air pressure, surface, weather, rider performance and behaviour cannot be reproduced in all cases, so the results are not generally comparable

 

[Artstu]

R200

www.bosch-ebike.com

In field tests relating to the eBike range, previous results depended heavily on the rider and the external conditions. Rider weight, tyres, air pressure, surface, weather, rider performance and behaviour cannot be reproduced in all cases, so the results are not generally comparable

But he's only talking about the battery gauge, NOT the range feature doh.

 

[soundwave]

the batt level and the range read out is all over the place as it try to guess what range is left depending on how the bike is being ridden.

the app now works if you have kiox.

Battery charge level (Android):
The current battery charge level of your system is displayed next to the bicycle icon under "My eBike". This feature is available in conjunction with Nyon.

Bosch Kiox E-Bike Display - anthrazit

Das Bosch eBike Display Kiox ist die neueste Display Generation für alle Bosch betriebenen E-Bikes mit Active- oder Performance Line…

www.elektrofahrrad24.de

cant buy it yet tho and only comes with new bikes atm.

 

[Deleted member 25121]

Why not just set it up so that the battery reading is linear to the aggregate power left? Don't smartphones manage this?

I don't know whether the display claims to show range left, charge left or power left but from what you describe it does look to be rather poor across the range, has it behaved this way since the battery was new?
I presume its a genuine Bosch battery that hasn't been re-celled.
My iPhone battery indicator seems to drop quickly when the battery is below 30% or so, it's not an easy calculation.

 

[soundwave]

I don't know whether the display claims to show range left, charge left or power left but from what you describe it does look to be rather poor across the range, has it behaved this way since the battery was new?
I presume its a genuine Bosch battery that hasn't been re-celled.
My iPhone battery indicator seems to drop quickly when the battery is below 30% or so, it's not an easy calculation.

on my old intuvia display even the time went out of wack pmsl

 

[Andy-Mat]

The one thing I find most frustrating about the Bosch system is the battery remaining charge readouts on their controllers and the battery itself.

First of all I don't understand why it simply cant be expressed as a %, as every smartphone battery has been for years, for example. 20% chunks really are too big especially once the battery gets down below 40%. With one bar showing I might have enough battery power to do a 30km flat ride on Eco or I might run out in ten yards time...

Secondly it is apparent to me, now I am doing a consistent commmute, that the 5 bars on my 500W/hr battery do not represent 100W each.

Two days ago I set off with a full battery (100%).
It dropped to 4 bars (nominally 80%) after 32km (mostly on Tour with a little Eco).

This morning I had 3 bars showing when I set off of the same route, done in the same time, in the same conditions (maybe a little warmer ambient temperature) and with the same boost.

So I had on the face of it at least 40% battery left when I set out this morning. But by the time I had done 20km it had dropped under 20% (i.e. gone down to one bar). Perhaps small differences in a ride might have accounted for a few %, but basically it looks to me like the 100-80% bar on the Bosch display in fact reflects 50% more Watts than the 40-20% one. I'll probaby get close to ending the commute tonight at 0%, so I'll keep an eye out to see if the drop off continues.

Is this a known issue?

Buy a battery capacity meter, they start really cheap on ebay.....maybe someone here can even recommend one?

12V~60V Lead Acid LiFePO4 Lithium Li-ion Battery Capacity Indicator Voltmeter | eBay

About the 12V Lead Acid battery(can use for 4S LiFePO4). About the 24V Lead Acid battery(can use for 8S LiFePO4). About the 48V Lead Acid battery(can use for 15S or 16S LiFePO4). About the 60V Lead Acid battery.

www.ebay.co.uk

regards

Andy

 

[soundwave]

Buy a battery capacity meter, they start really cheap on ebay.....maybe someone here can even recommend one?

12V~60V Lead Acid LiFePO4 Lithium Li-ion Battery Capacity Indicator Voltmeter | eBay

About the 12V Lead Acid battery(can use for 4S LiFePO4). About the 24V Lead Acid battery(can use for 8S LiFePO4). About the 48V Lead Acid battery(can use for 15S or 16S LiFePO4). About the 60V Lead Acid battery.

www.ebay.co.uk

regards

Andy

it wont work as the batt has to talk to the motor and if there is anything in between it wont even power on.

 

[Andy-Mat]

it wont work as the batt has to talk to the motor and if there is anything in between it wont even power on.

Why do you imagine they are being sold?
Because you say they don't work?
Think about it!!
Of course you can attach such a unit with just a modicum of knowledge....just need the correct unit for the nominal battery voltage.