This section introduces two basic techniques for current sensing applications, low-side current sensing and high-side current sensing. Each technique has its own advantages and disadvantages, discussed in more detail in the following topics. There are a variety of current sensing technologies that can monitor the status of an HEV or EV battery. As shown in Figure 1, there are two main locations where you can measure current: top of stack (high-side sensing) and bottom of. The battery cabinet can not only measure, use the three-phase current, voltage, power, but also monitor the current, voltage, power factor of the multiple branches.