BMW Intelligent Battery Sensor 7570031

MarkS · 1st April 2020, 11:53

Rover 75s have a record of issues with flat batteries.
To that end I have purchased a BMW Intelligent Battery Sensor, 7570031, off an old BMW E87.
This is essentially a 35mm2 battery negative cable, with a built in current sensor, battery voltmeter, et al, which monitors the state of battery.
It has a 2 pin connector, the bit serial data interface. This uses a LIN (Local Interconnect Network) bus interface to extract the information.

Is there anybody here that knows about this technology.
I am looking to build some kind of remote readable battery monitor for the R75.

clf · 1st April 2020, 12:29

Quote:

Originally Posted by MarkS

Rover 75s have a record of issues with flat batteries.
To that end I have purchased a BMW Intelligent Battery Sensor, 7570031, off an old BMW E87.
This is essentially a 25mm2 battery negative cable, with a built in current sensor, battery voltmeter, et al, which monitors the state of battery.
It has a 2 pin connector, the bit serial data interface. This uses a LIN (Local Interconnect Network) bus interface to extract the information.

Is there anybody here that knows about this technology.
I am looking to build some kind of remote readable battery monitor for the R75.

All cars have issues with batteries. It is not limited to 75s. How about something like THIS instead?

sworks · 1st April 2020, 13:15

The 75 never had a battery load sensor and iirc no Lin bus (I’d need to check) as it’s quite newish technology. Most manufacturers that use battery load sensors use them for stop start and smart charge reasons. The engine ecu has the ability to read battery state of charge and battery state of health. Lin bus is also used for park sensors and body electrics as it’s quite a slow speed, a single wire that switches between system voltage and earth. I think there’s possibly an easier way of what your trying to achieve either by an extra volt meter, amp meter or torque app set up.

MarkS · 1st April 2020, 13:37

The BM2 suggested, measures the battery voltage. This won't tell you the current being drawn from the battery after shutdown, or if something has not shutdown properly. It will only highlight a discharging battery, long after the problem has occurred.

The BMW IBS has already been designed and manufactured to do exactly what is required. I believe it will measure a shutdown current of up to 10A, although what the minimum is, is unknown.

Just remove the existing battery ground wire, replace by the IBS, and monitor the battery properly.

All it needs is an interface to extract that information.

MarkS · 1st April 2020, 13:58

The LIN bus connector has 2 wires.
One is grey.
The other is white with a blue trace.

Is one used for transmit data from master to slave ?
Is the other used to receive data from slave to master ?

Does the IBS have a specific predefined address to reply to ?

I believe LIN bus started in ~ 2002.

sworks · 1st April 2020, 18:42

When I suggested an amp meter it was more a test of the parasitic drain to see if you had an issue. The battery load sensors I’m familiar with have two wires, one is a 12volt feed, the other is the lin signal from the engine ECU

COLVERT · 1st April 2020, 19:11

All you need is a plug in meter/voltage tester in the cigarette lighter.

Bought one over here in France for a few Euros.

You can also get phone USB chargers that have a continuous voltage/battery readout on them.

Again 3 or 4 Euros.-----

75 tinkerer · 1st April 2020, 19:54

When I'm checking currents I use those big fat fuses as sense resistors, trouble is not all the loads go through them. I've rigged up a lead which enables me to replace one of the small fuses with an external one and uses that as a sense resistor - I've never used it.

Pete

MarkS · 3rd April 2020, 06:06

Quote:

Originally Posted by MarkS

I believe it will measure a shutdown current of up to 10A, although what the minimum is, is unknown.

It transpires the shutdown current is in the order of 9 - 21mA, depending on car model, with a warning message sent if the shutdown current exceeds 80mA.

https://www.bimmerfest.com › ...PDF
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Contents Energy management Models Introduction System ... - Bimmerfest

MarkS · 10th April 2020, 18:59

Has anybody in the Bournemouth area got a BMW, Mini, or Rolls Royce, with an Intelligent Battery Sensor, that is happy to be monitored.

I would attach a picture, but this forum won't allow pictures that are too big in size to upload

1st April 2020, 11:53	#1
MarkS Gets stuck in Rover 75 Diesel Tourer, called Perseverance Join Date: Nov 2011 Location: Bournemouth Posts: 664 Thanks: 189 Thanked 157 Times in 108 Posts	BMW Intelligent Battery Sensor 7570031 Rover 75s have a record of issues with flat batteries. To that end I have purchased a BMW Intelligent Battery Sensor, 7570031, off an old BMW E87. This is essentially a 35mm2 battery negative cable, with a built in current sensor, battery voltmeter, et al, which monitors the state of battery. It has a 2 pin connector, the bit serial data interface. This uses a LIN (Local Interconnect Network) bus interface to extract the information. Is there anybody here that knows about this technology. I am looking to build some kind of remote readable battery monitor for the R75. Last edited by MarkS; 1st April 2020 at 20:53.. Reason: 35mm2

1st April 2020, 13:15	#3
sworks Been absent for a while… Rover 75 Tourer, Classic mini Cooper S, Abarth 595 competizione, MG TF and a Hyundai Tucson PHEV Join Date: Feb 2007 Location: Cumbria Posts: 13,065 Thanks: 1,033 Thanked 1,686 Times in 1,040 Posts	The 75 never had a battery load sensor and iirc no Lin bus (I’d need to check) as it’s quite newish technology. Most manufacturers that use battery load sensors use them for stop start and smart charge reasons. The engine ecu has the ability to read battery state of charge and battery state of health. Lin bus is also used for park sensors and body electrics as it’s quite a slow speed, a single wire that switches between system voltage and earth. I think there’s possibly an easier way of what your trying to achieve either by an extra volt meter, amp meter or torque app set up. __________________ ................................................. 'Marmite' Possibly one of the most famous 75 tourers produced! left the production line as the last of only Three Rover 75 tourers produced in Trophy Yellow. 48 hours later Longbridge closed. The last sold ordered 75 Tourer. Paid for by the Phoenix Four and handed over by John Towers to the Warwickshire Northampton Air ambulance service as a Rapid Response vehicle

1st April 2020, 13:37	#4
MarkS Gets stuck in Rover 75 Diesel Tourer, called Perseverance Join Date: Nov 2011 Location: Bournemouth Posts: 664 Thanks: 189 Thanked 157 Times in 108 Posts	The BM2 suggested, measures the battery voltage. This won't tell you the current being drawn from the battery after shutdown, or if something has not shutdown properly. It will only highlight a discharging battery, long after the problem has occurred. The BMW IBS has already been designed and manufactured to do exactly what is required. I believe it will measure a shutdown current of up to 10A, although what the minimum is, is unknown. Just remove the existing battery ground wire, replace by the IBS, and monitor the battery properly. All it needs is an interface to extract that information. Last edited by MarkS; 1st April 2020 at 13:46..

1st April 2020, 13:58	#5
MarkS Gets stuck in Rover 75 Diesel Tourer, called Perseverance Join Date: Nov 2011 Location: Bournemouth Posts: 664 Thanks: 189 Thanked 157 Times in 108 Posts	The LIN bus connector has 2 wires. One is grey. The other is white with a blue trace. Is one used for transmit data from master to slave ? Is the other used to receive data from slave to master ? Does the IBS have a specific predefined address to reply to ? I believe LIN bus started in ~ 2002. Last edited by MarkS; 1st April 2020 at 14:00..

1st April 2020, 18:42	#6
sworks Been absent for a while… Rover 75 Tourer, Classic mini Cooper S, Abarth 595 competizione, MG TF and a Hyundai Tucson PHEV Join Date: Feb 2007 Location: Cumbria Posts: 13,065 Thanks: 1,033 Thanked 1,686 Times in 1,040 Posts	When I suggested an amp meter it was more a test of the parasitic drain to see if you had an issue. The battery load sensors I’m familiar with have two wires, one is a 12volt feed, the other is the lin signal from the engine ECU __________________ ................................................. 'Marmite' Possibly one of the most famous 75 tourers produced! left the production line as the last of only Three Rover 75 tourers produced in Trophy Yellow. 48 hours later Longbridge closed. The last sold ordered 75 Tourer. Paid for by the Phoenix Four and handed over by John Towers to the Warwickshire Northampton Air ambulance service as a Rapid Response vehicle Last edited by sworks; 1st April 2020 at 18:45..

1st April 2020, 19:11	#7
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	All you need is a plug in meter/voltage tester in the cigarette lighter. Bought one over here in France for a few Euros. You can also get phone USB chargers that have a continuous voltage/battery readout on them. Again 3 or 4 Euros.-----

1st April 2020, 19:54	#8
75 tinkerer Regular poster Rover 75 Tourer Join Date: Mar 2013 Location: Darlington Posts: 95 Thanks: 12 Thanked 10 Times in 9 Posts	When I'm checking currents I use those big fat fuses as sense resistors, trouble is not all the loads go through them. I've rigged up a lead which enables me to replace one of the small fuses with an external one and uses that as a sense resistor - I've never used it. Pete