Battery impedance tester and measuring method

Abstract

The invention discloses a battery impedance tester and an internal resistance measuring method thereof. The battery impedance tester comprises an excitation signal generation module, a V-I conversion module, a signal conditioning module, an orthogonal decomposition module and a signal acquisition module. The excitation signal generation module is connected with the V-I conversion module and the orthogonal decomposition module, the V-I conversion module is further connected with the signal conditioning module and the battery to be tested, the signal conditioning module is further connected with the battery to be tested, and the signal conditioning module, the orthogonal decomposition module and the signal acquisition module are further connected in sequence. And the excitation signal generation module and the signal acquisition module are also connected with an external main control board. The battery impedance tester only integrates the excitation signal generation module, the V-I conversion module, the signal conditioning module, the orthogonal decomposition module and the signal acquisition module in an embedded manner, and does not comprise other control devices. The battery impedance testing device is low in cost, low in power consumption and small in size.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a battery impedance tester and a measurement method. Background technique [0002] With the diversification of the energy structure in modern society and the development trend of greening, the application scope of batteries is becoming wider and wider, and the market size is also becoming larger and larger, and the importance of performance evaluation of related products has become increasingly prominent. Its test indicators include voltage, capacity, internal resistance, power, etc., of which internal resistance is an important indicator for evaluating battery performance. Under normal circumstances, batteries with the same nominal capacity have stronger discharge capacity with smaller internal resistance, and weaker discharge capacity with larger internal resistance. During the use of the battery, along with the repeated charging and discharging processes, the elec...

AI Technical Summary

Problems solved by technology

The battery tester products of these instrument manufacturers have the characteristics of high precision, fast and easy operation, but their high application cost, bulky and heavy disadvantages also limit their application in automation solutions

In addition, in the R&D and production of electronic products, a variety of measuring instruments are often required. These instruments are bulky and have different manufacturers, which bring various cumbersome maintenance, update and debugging tasks in production activities, which are not conducive to promoting the current The process of intelligent manufacturing

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