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Battery DC resistance evaluation system

A DC resistance and evaluation system technology, applied in secondary batteries, measuring resistance/reactance/impedance, circuits, etc., can solve problems such as the influence of noise on measurement results

Inactive Publication Date: 2016-06-01
YOKOGAWA ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When a large-capacity power supply is used, measurement results are easily affected by noise generated from the above-mentioned equipment, for example

Method used

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Embodiment Construction

[0031] In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown schematically in order to simplify the drawings.

[0032] Hereinafter, an embodiment of the present invention will be described in detail using the drawings. figure 1 It is a block diagram showing the configuration of a battery DC resistance evaluation system (this system) according to an embodiment of the present invention.

[0033] like figure 1 As shown, this system is used to evaluate the electrical characteristics of the battery 1 . This system has: DCR analyzing device 4 , AC power supply 5 and impedance measuring device 6 . The battery 1 to be measured is connected to an AC power source 5 and an impedance measu...

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Abstract

The present invention provides a battery DC resistance evaluation system, which includes an impedance measurement device for measuring the AC impedance of a secondary battery and a DC resistance analysis device, the DC resistance value analysis device is based on the measurement results of the impedance measurement device, according to the The response voltage of the secondary battery is calculated based on the circuit constants calculated by the equivalent circuit of the secondary battery, the current value included in the battery DC resistance measurement conditions, and the OCV as an open circuit voltage value, and based on the response voltage and The DC resistance measurement condition of the battery is used to calculate the internal DC resistance value of the secondary battery. According to the system described above, it is possible to efficiently measure the DC resistance of the battery in a short time without using a large-capacity power supply.

Description

[0001] Related application: This application claims the priority of Japanese Patent Application No. 2012-098622 filed with Japan Patent Office on April 24, 2012. technical field [0002] The invention relates to a battery DC resistance evaluation system. Background technique [0003] For example, one of performance evaluation indexes of a secondary battery used in a hybrid vehicle is a direct current resistance (DCR; DirectCurrentResistance) inside the battery. For example, a specific test method for such DCR is stipulated and published in "Japan Electric Vehicle Association Standard JEVSD714 DC Resistance Calculation Method of Sealed Nickel-Hydrogen Battery for Hybrid Vehicles" (Non-Patent Document 1). [0004] Figure 12 It is a block diagram showing an example of a conventional DCR measurement system. like Figure 12 As shown, a charging and discharging device 2 and a voltage and current measuring device 3 are connected to a battery 1 as a measurement object. The chargi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/02
CPCY02E60/10G01R27/08H01M10/48G01R31/389G01R31/3842G01R31/3648G01R31/374G01R19/16528G01R19/16542B60L58/10
Inventor 小濑一幸浜野哲志数见昌弘吉武哲
Owner YOKOGAWA ELECTRIC CORP