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Device and method for detecting abnormality of electric storage device

一种蓄电装置、检测装置的技术，应用在用电装置、测量装置、电路装置等方向，能够解决成本增加、热量产生、处理时间增加等问题

Inactive Publication Date: 2010-01-06
PANASONIC EV ENERGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the structure of measuring the battery block voltage and current of each battery block, the battery block voltage requires an A / D converter, which may lead to an increase in cost
In addition, since the IR is calculated by the least square method based on the battery block voltage and current, there is a problem of an increase in processing time and an increase in the load of the processing program due to an increase in the amount of calculation
In addition, when the calculation speed is increased in this state, the generation of heat may be caused, which may hinder the size reduction of the detection device

Method used

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  • Device and method for detecting abnormality of electric storage device
  • Device and method for detecting abnormality of electric storage device
  • Device and method for detecting abnormality of electric storage device

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Embodiment Construction

[0014] Preferred embodiments of the present invention will now be described.

[0015] FIG. 1 shows the configuration of a battery pack abnormality detection device in this embodiment. Similar to the battery pack control device shown in FIG. 14, this abnormality detection device is equipped in a hybrid vehicle, and detects abnormality of the battery pack. FIG. 1 does not show the battery power input and output section 1 , the vehicle control section 5 , the engine control section 13 , etc. shown in FIG. 14 because these elements are similar to those in FIG. 14 . These elements will not be described again.

[0016] In FIG. 1 , an assembled battery 100 as a power storage device includes a plurality of battery blocks B1 to Bn, and the battery blocks B1 to Bn are connected in series. Each battery block includes one or more individual batteries connected in series. For example, each battery is a nickel metal hydride battery or a lithium ion battery.

[0017] Voltage sensors 120 ...

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Abstract

Provided is an abnormality detecting device for detecting an abnormality of electric storage devices such as a battery pack. Comparators (140-1) to (140-n) detect timing in which a voltage reaches a prescribed voltage, for each block of a battery pack (100). A judging section (160) detects a current at a time when the voltage reaches the prescribed voltage, and a representative current value is calculated for each block. The deviation of the representative current value of each block is compared with the threshold value, and when the deviation is large, it is judged that there are abnormalities such as short-circuiting, minute short-circuiting, IR (internal resistance) increase, capacitance reduction, and the like.

Description

technical field [0001] The present invention relates to a device, method, and program for detecting abnormality of a power storage device, particularly a technique for detecting abnormality of a power storage device such as a battery pack including a plurality of battery blocks connected in series. Background technique [0002] In the prior art, a battery block is constructed by connecting one or more batteries in series and a battery pack formed by connecting a plurality of battery blocks in series is equipped in a hybrid vehicle and an electric vehicle, and a method for measuring each battery of the battery pack has been developed block voltage or current and means for detecting anomalies. The basic method to detect anomalies is to measure the voltage and current of each battery block, and calculate the internal resistance (IR) by the least square method. Anomalies are detected based on increases or deviations in IR. [0003] FIG. 12 shows the results of a graph of curre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36G01R31/00H01G11/00H01G11/10H01G11/14H01G13/00H01G15/00H01M10/48H02J7/00H02J7/02
CPCG01R19/16542H01M10/482B60L2260/56Y02T10/7061G01R31/3624G01R31/3658B60L3/0046Y02T10/7011B60L11/1864Y02T10/7005G01R31/3842G01R31/396B60L58/21B60L58/15B60L58/14Y02T10/70Y02E60/10
Inventor 中西利明
Owner PANASONIC EV ENERGY CO LTD
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