Device for estimating cycle life of battery

A battery cycle and estimation device technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of deep battery life judgment accuracy and the most controversial
CN102135603AActive Publication Date: 2011-07-27IND TECH RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
IND TECH RES INST
Publication Date
2011-07-27

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Abstract

The invention relates to a device for estimating the cycle life of a battery, comprising a measuring unit, an observer unit, an adaptability parameter unit, an inner voltage estimating unit, an open-circuit voltage estimating unit, a battery cycle life computing unit and a battery residual electricity quantity estimator, wherein the measuring unit is used for measuring the working currents, the working voltages and the working temperature of the battery; the observer unit can observe the voltage of the output end of the battery and the voltage of an RC (Resistance Capacitance) parallel circuit of the battery; the adaptability parameter unit can update the parameter values of the battery; the inner voltage estimating unit can estimate the inner voltages of the RC parallel circuit of the battery; the open-circuit voltage estimating unit can compute the static open-circuit voltages of the battery; the battery cycle life computing unit can compute the cycle life value of the battery; and the battery residual electricity quantity estimator can estimate the residual electricity quantity value of the battery.
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Description

technical field

[0001] The present invention relates to a device for estimating the cycle life of a battery, in particular to a device which uses an adaptive algorithm to estimate the internal resistance of the battery from the input operating voltage and operating current, and then estimate the cycle life of the battery. , for real-time measurement and estimation, so it has the characteristics of continuous monitoring. This device is also applicable to lead-acid, nickel metal hydride and lithium-ion batteries. Background technique

[0002] In terms of battery status monitoring function, it is divided into two parts: state of charge (SOC) estimation and cycle life (state of health, SOH) estimation, which are currently more frequently discussed topics, such as electric vehicle The battery pack management is in charge of a battery management system (Battery Management System, BMS), which is responsible for monitoring the battery status, having an overcharge / discharge protectio...

Claims

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