mkove electronics

Mkove Battery Monitor MK70

 

We are proud manufacturers of the Mkove Battery Monitor Mk70, a smart and high quality lead acid battery monitoring system.

 

MK70's are currently out of stock. More are being manufactured.

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Suitable for 12 or 24 volt lead acid battery systems, the MK70 is suitable for use in boats, remote homes, remote vehicles, forklifts, trucks or similar applications. It is an advanced monitoring system which will show you the state of charge of your battery system. It does this through a number of strategies which will keep the battery monitor system closely aligned to the state of charge of your battery.

 

Installation Video

 

 

 

Operation Video

 

 

 

 

Accuracy

 

Accuracy is essential in a battery monitoring system. Most battery monitors will wander up to a quarter of an amp even when there is no load on the battery. They do this because of the long sense lines which are run from the battery to the display and calculation unit. We use a two module system to sense the voltage and current close the battery and then use a digital signal which is immune to interference to send the data to the display unit. Using this system the data is transmitted at the full accuracy at which it is sensed. This gives you a much more accurate picture of your battery use and gives the battery monitor much more accurate data to work with.

 

The internal voltage and current sense IC is the Texas Instruments INA226, released in August 2011, and is the industry's most accurate current shunt monitor.

 

Intelligent Systems

 

Battery monitors generally rely on detecting when the battery is full to maintain synchronisation with the battery. (Reference [1] [2] [3]). If the battery isn't charged to full regularly they can quickly lose synchronisation with the battery and report an inaccurate state of charge.

 

The MK70 uses a number of unique techniques to keep the state of charge accurate.

 

It uses state of charge guarding which watches the battery when it is in a resting state. After one hour in a resting state it uses a state of charge table to calculate the state of charge for the current resting voltage. It then applies an accuracy window of 40% to the current state of charge. If the state of charge is out by more than 40% it will slowly apply a correction factor to bring the reported state of charge to within 40% of the calculated resting state of charge and keep doing this while ever the battery is resting. The accuracy window slowly reduces from 40% after one hour to 10% after 24 hours. This is because the resting voltage to state of charge calculation becomes more accurate the longer the battery has been resting. After 24 hours in a continual resting state the accuracy window will remain at 10%.

 

It uses temperature data from the sensor unit, internal resistance calculations and charge efficiency data to to make the most accurate adjustments to the state of charge possible. As the battery is cycled these calculations are updated to match the history of the battery.

 

It also uses a system which can adjust the current state of charge while the battery is being charged. It does this by making many calculations while the battery is under charge, each calculation could be inaccurate by a few percent, although they are usually very accurate, but when combined and slowly applied on a continual basis result in a very accurate state of charge calculation during charging. These calculations are slowly applied to the reported state of charge to keep the monitor accurately aligned with the battery. This means that a battery can be partially charged and the system will still be able to align itself with the actual state of the battery.

 

Simpler Installation

units and shunt

connectors

 

All battery monitors require a shunt to be installed to measure the current flowing into and out of the battery. Almost all require the shunt to be installed in the negative or ground side of the system. With the MK70 the shunt can be installed in either the positive or negative main cable from the battery.

 

By using a two module system all of the more complicated wiring can be done close to the battery with short and low capacity wires. There are only three wires which need to be run from the sensor unit to the main display unit. The cable length between the sensor and main units can be up to fifty meters without any loss of accuracy.

 

 

Please see our Articles page for more information.

The manual for this product can be found here.