Technical FAQs 4

How can a high voltage multiplexer improve battery monitoring accuracy?

A high voltage multiplexer of 17-cell battery monitoring analog front end (AFE) is adopted to acquire each cell voltage for accurate monitoring. Besides, a current compensation scheme is proposed to tackle the current leakage in each channel to further improve the acquisition accuracy.

Are battery pack monitoring schemes accurate?

Although some battery pack monitoring schemes have increased the number of measurable channels in a chip for higher voltage battery packs, the issue of accuracy caused by the common mode voltage difference in each unit of series battery pack remains unsolved.

How is current derived from a voltage sampling structure?

The current flowing through the channel, I in, is derived from the extracted voltage sampling structure. The compensation current, I c1, is obtained through a unit gain negative feedback loop formed by the low voltage amplifier and M 2.

What is a 17-cell battery monitoring analog front end?

This paper presents the design of a 17-cell battery monitoring analog front end using 0.18 μm high voltage BCD technology. To achieve high-accuracy battery voltage measurement, a differentiated multi-channel high-voltage switch array and a battery sense structure with leakage current compensation are employed.

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Battery cabinet current sampling

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Simplify Voltage and Current Measurement in Battery

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