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A battery detection circuit and detection method

A battery detection and detection method technology, applied in the electronic field, can solve problems such as complex calculation of internal resistance

Active Publication Date: 2019-07-02
ZHANGZHOU EASTERN INTELLIGENT METER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, using this algorithm, due to the introduction of many influencing factors (such as temperature, load and aging factors, etc.), the calculation of internal resistance is very complicated

Method used

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  • A battery detection circuit and detection method
  • A battery detection circuit and detection method
  • A battery detection circuit and detection method

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Embodiment Construction

[0031] Certain words are used to refer to specific components in the description and claims, and those skilled in the art should understand that manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a basis for distinction. The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] figure 1 is a schematic diagram of the battery detection circuit of the embodiment of the present invention. Such as figure 1 As shown, the battery detection circuit includes: battery V, battery equivalent internal resistance R S , the first constant voltage source V1, the first resistor R1, the second constant voltage source V2, the second resistor R2, the switch SW, the current detection resistor R fg and equivalent load resistance R L .

[0033] Among them, t...

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Abstract

The present invention discloses a battery detection circuit and a detection method. The detection method comprises the following steps of controlling the first control end of a selector switch and the second control end of the selector switch to be switched on, maintaining the switched-on state for a first predetermined period of time to allow a first constant-voltage source to be connected with the battery detection circuit, and obtaining a first voltage and a first current; controlling the first control end of the selector switch and the third control end of the selector switch to be switched on, maintaining the switched-on state for a third predetermined period of time to allow a second constant-voltage source to be connected with the battery detection circuit, and obtaining a second voltage and a second current; and obtaining the resistance value of the equivalent internal resistance of a battery according to the first voltage, the first current, the second voltage and the second current. Based on the above manner, the internal resistance of the battery can be obtained in the relatively simple manner. Therefore, the practical application of the circuit and the method is facilitated.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a battery detection circuit and a detection method. Background technique [0002] With the continuous development of contemporary electronic technology, mobile devices have gradually entered the lives of mass consumers. Therefore, the attention to power management of devices is also increasing day by day. Lithium-ion batteries, as a new type of energy supply equipment, have also entered large-scale commercial stage. [0003] As the number of battery charge and discharge cycles increases, the phenomenon of "aging" occurs in lithium batteries, which is mainly manifested in two aspects: the decrease of battery chemical capacity and the increase of battery internal impedance. Among them, the increase of the internal impedance of the battery is particularly obvious, and the increase of the internal resistance will accelerate the output voltage of the battery to reach the cut-off ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/389G01R27/08
CPCG01R31/389
Inventor 李岳
Owner ZHANGZHOU EASTERN INTELLIGENT METER