Cell information acquisition circuit and cell internal resistance acquisition method

Abstract

The invention relates to the technical field of new energy batteries, and discloses a cell information acquisition circuit and a cell internal resistance acquisition method. The cell information acquisition circuit comprises a voltage acquisition circuit, an equalization circuit, a first signal acquisition point and a second signal acquisition point. The voltage acquisition circuit comprises a first voltage acquisition resistor and a second voltage acquisition resistor; the equalization circuit comprises an equalization triode switch, an equalization driving resistor and an equalization resistor, one end of the equalization driving resistor is connected with a grid electrode of the equalization triode switch, the other end of the equalization driving resistor is provided with a first signal acquisition point, and a second signal acquisition point is arranged between the equalization resistor and a drain electrode of the equalization triode switch. According to the invention, the internal resistance of the battery cell is acquired through the compatibility of the multiplex voltage acquisition circuit and the equalization circuit, so that the circuit structure complexity and the hardware cost are reduced, and the integrated acquisition of the voltage information, the equalization information and the internal resistance information of the battery cell is realized.

Description

technical field [0001] The invention relates to the technical field of new energy batteries, in particular to a cell information collection circuit and a cell internal resistance collection method. Background technique [0002] With the rapid development of new energy vehicle technology, higher and higher requirements are also put forward for the product performance, reliability and safety of its key components. As the core component of new energy electric vehicles, power batteries have very high safety requirements. Real-time data collection of battery cells is required to monitor their operating conditions. The existing cell information collection circuit involves a variety of information collection, such as voltage information, current information, voltage balance information, etc., so its overall structure is generally more complicated. In addition, the existing cell information collection circuit generally does not provide cells. The internal resistance detection funct...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a battery information collection circuit and a battery internal resistance collection method, aiming to solve the technical problem of how to reduce the complexity of the battery information collection circuit and realize the collection of various battery information at low cost

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