![]() The illustration below highlights these points on battmon screenshot taken from automotive battery in good health starting car engine (10 seconds chart recorder scroll window). Visually on screen and, such as whether battery is accepting charge and how well. on motor vehicle while driving, when parked, and when engine is off.without the need to remove battery from automobile.Estimated battery capacity (A*Hrs) based on coulombic charge accepted and charge releasedīattmon can provide important battery health information:.Battery cranking amperes (CA), and if temperature is low enough, then cold cranking amperes (CCA).Engine Starting: Current draw and Duration.State of Charge SoC (0 to 100%), separately, while. ![]() The following raw automotive battery parameters are displayed and recordedīased on them, the above data from automotive battery, the following battery parameters are computed, displayed live at run time and logged to SD card as well NET application battmon.ĭescribed below automotive battery smart monitor (battmon) has significant capabilities to obtain, display and record several key battery parameters, and figure out several other battery properties based on several charge or engine starting cycles to notify user about battery health and life expectancy. It combines hardware and software relatively well and can communicate with software running on Windows PC with ease over serial connection.Ī diagram below illustrates how automotive battery parameters are measured by microcontroller, processed, logged and optionally sent to Windows PC ruining. ![]() Arduino microcontroller platform appeared to be a good start for these sensors. To provide the equivalent of smart battery chip functionality for lead acid battery, the same three sensors are need: voltage, current and temperature. Depending on the capabilities of smart battery chip, it may send out raw data or perform computation to present more advanced data, based on raw input data, for example count number of battery charge-discharge cycles. Smart battery chip as it commonly is seen in modern batteries such as lithium batteries continuously collects three run time parameters: battery voltage, battery current, and battery temperature. Yet there is enough room in any motor vehicle to have a tiny sensor which can monitor lead acid battery at real time, so a small project was created to get proper hardware and software to work together to provide smart battery like features for automotive battery.Ī simple and non-intrusive approach was used so that no cables or wires are to be cut or disconnected in the automobile, only probes are attached to battery terminals, and one non-contact current sensor on battery cable. Lead acid batteries are commonly made simple and lack any kind of smart battery chip in them, leaving the automotive shop with the task to test battery. Many modern types of batteries (such as lithium batteries) are designed with a smart battery chip built in, which provides a great deal of information about their state of charge and so on. This article demonstrates a combination of hardware and software to create a practical mobile engineering tool to monitor and check health along with many other parameters of Lead acid battery, automotive battery was chosen as an easy example.
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