Valve control seal type lead-acid storage battery health condition monitoring method

A lead-acid battery, health state technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as poor accuracy and difficult online prediction

Inactive Publication Date: 2015-04-29
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for monitoring the health state of a valve-controlled sealed lead-acid battery, which solves the problems of poor accuracy in monitoring the health state of the current lead-acid battery and difficulty in online prediction

Method used

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  • Valve control seal type lead-acid storage battery health condition monitoring method
  • Valve control seal type lead-acid storage battery health condition monitoring method
  • Valve control seal type lead-acid storage battery health condition monitoring method

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Embodiment Construction

[0087] The present invention will be described in detail below in combination with specific embodiments.

[0088] The steps of the method for monitoring the health state of the valve-controlled sealed lead-acid battery of the present invention are as follows: figure 1 shown, follow the steps below:

[0089] Step 1: Mathematical model of the battery: The internal reaction of the battery is very complex, and the parameters are highly nonlinear, and these parameters are constantly changing under different working environments. Therefore, it is basically extremely complicated and unrealistic to establish a battery model through the internal reaction relationship of the battery. In the actual application of the battery, the external characteristic parameters of the battery are usually measured, so according to the change curve of the battery discharge terminal voltage, the shape and change characteristics of the discharge curve are analyzed, so as to establish the function model o...

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Abstract

The invention discloses a valve control seal type lead-acid storage battery health condition monitoring method. According to a storage battery terminal voltage (V) and depth of discharge (DOD) changing curve fitting mathematic model, only after parameters in the model are identified, can the depth of discharge (DOD*) of a battery under the full-capacity discharge condition be solved with a bisection method; then, temperature variables are used for converting the depth of discharge (DOD*) into the depth of discharge (DOD*[25]) at the standard temperature of 25 DEG C; finally an SOH value of the battery can be calculated according to the definition of the storage battery health condition (SOH). The valve control seal type lead-acid storage battery health condition monitoring method has the advantages that the lead-acid storage battery health condition monitoring is high in accuracy, and on-line forecasting can be carried out.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to a method for monitoring the health state of a valve-controlled sealed lead-acid battery. Background technique [0002] State of health - when the battery is fully charged, the ratio of the actual capacity of the battery to the rated capacity, expressed in SOH, characterizes the degree of attenuation of battery performance; [0003] On-line battery monitoring technology—under normal operating conditions where the battery pack does not exit the power system, use an online monitoring device to test the performance parameters of the battery, and use a certain calculation method or mathematical model to analyze the data to obtain the battery health status a method of [0004] Short-term discharge——Use the battery online monitoring device to keep the battery in the discharge state without disconnecting the charging power supply for 0.5 hours. Sampling and collecting data such as the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 刘仰光马江敏
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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