WO2018088208A1 - Système de batterie rechargeable - Google Patents

Système de batterie rechargeable Download PDF

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Publication number
WO2018088208A1
WO2018088208A1 PCT/JP2017/038450 JP2017038450W WO2018088208A1 WO 2018088208 A1 WO2018088208 A1 WO 2018088208A1 JP 2017038450 W JP2017038450 W JP 2017038450W WO 2018088208 A1 WO2018088208 A1 WO 2018088208A1
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WO
WIPO (PCT)
Prior art keywords
secondary battery
battery system
thin film
conductive thin
cleavage valve
Prior art date
Application number
PCT/JP2017/038450
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English (en)
Japanese (ja)
Inventor
啓 坂部
Original Assignee
株式会社日立製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社日立製作所 filed Critical 株式会社日立製作所
Publication of WO2018088208A1 publication Critical patent/WO2018088208A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/52—Removing gases inside the secondary cell, e.g. by absorption
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a secondary battery system.
  • secondary battery systems incorporating a large number of batteries such as power storage devices for mobile objects, power storage devices for grid connection stabilization, and emergency power storage devices have attracted attention.
  • the secondary batteries used in these secondary battery systems are cleaved when the internal pressure rises and the gas inside the secondary battery is discharged from a predetermined path in order to prevent the secondary battery from bursting due to the rise in internal pressure.
  • a valve is provided. When this cleavage valve operates, the secondary battery cannot exhibit its original performance. For this reason, the secondary battery system performs automatic stop or degenerate operation of the secondary battery system, switching to a spare battery, or the like under a situation in which the cleavage valve operates or seems to have operated.
  • a detection means is required for the secondary battery system to detect the operation of the cleavage valve.
  • a detection means in Patent Document 1, a cleavage valve and a signal line are integrated, and the signal line is cut when the cleavage valve is cleaved.
  • the battery system can detect the operation of the cleavage valve by electrically detecting that the signal line is disconnected.
  • Patent Document 3 a material whose electrical characteristics change due to the contact of ejecta is placed on the discharge path.
  • any of the methods for detecting the change in the state of the secondary battery using the change in the state of the signal line it is necessary that the valve be cleaved immediately below the detection means. For this reason, it is necessary to have a device for starting the cleavage from a predetermined part of the cleavage valve and the accuracy of creating the cleavage valve.
  • the reason why the cleavage had to occur directly under the signal line, etc., is that the signal line is a one-dimensional “line”, whereas the cleavage valve is a two-dimensional “surface”, and the dimension does not match. .
  • This invention is providing the secondary battery system which can detect operation
  • a secondary battery having a cleavage valve that cleaves under specific conditions, a conductive thin film installed on the cleavage valve, and a measuring instrument that measures a voltage or resistance generated when a current is passed through the conductive thin film.
  • 1 is a configuration diagram of a secondary battery system according to an embodiment of the present invention.
  • 1 is a configuration diagram of a secondary battery system according to an embodiment of the present invention.
  • 1 is a configuration diagram of a secondary battery system according to an embodiment of the present invention.
  • 1 is a configuration diagram of a secondary battery system according to an embodiment of the present invention. It is a block diagram of the electroconductive thin film which concerns on one Embodiment of this invention.
  • a conductive thin film not a signal line, is installed so as to block a duct or a cleavage valve of a secondary battery. Then, whether the conductive thin film is broken is confirmed by using a resistance meter or the like, and if it is broken, it is determined that the cleavage valve is operated.
  • FIG. 1 illustrates a configuration of a detection unit that detects the operation of a cleavage valve.
  • the secondary battery system 100 includes a secondary battery 1, a conductive thin film 11, a resistance meter 12, and a signal line 13 that connects the resistance meter 12 and the conductive thin film 11.
  • the secondary battery 1 has a positive electrode terminal 41, a negative electrode terminal 42, and a cleavage valve 21.
  • the positive electrode terminal 41 and the negative electrode terminal 42 protrude in the direction in which the cleavage valve 21 is installed.
  • the secondary battery system 100 includes a plurality of secondary batteries 1, the secondary batteries 1 are connected in series.
  • the positive electrode terminal 41 and the negative electrode terminal 42 of the secondary battery 1 adjacent to each other are connected by a bus bar (not shown).
  • the secondary battery 1 further has a duct 14, and the conductive thin film 11 is installed on the duct through which the discharge from the cleavage valve 21 passes to block the duct 14.
  • the cleavage valve 21 is opened under specific conditions such as when the internal pressure of the secondary battery 1 is increased, and the pressure is released by discharging the contents of the secondary battery 1 such as gas. As a result, the secondary battery 1 can be prevented from being ruptured, and the contents can be discharged from a predetermined duct connected to the cleavage valve 21.
  • the conductive thin film 11 is placed on the cleavage valve 21.
  • the conductive thin film 11 is in contact with the secondary battery 1 (cleavage valve 21), and in FIG. 3, the conductive thin film 11 is installed so as to block the duct 14 of the contents of the secondary battery 1. Yes.
  • the cleavage valve 21 operates and the pressure is released, the pressure of the cleavage valve 21 and the conductive thin film 11 rises, and the conductive thin film 11 is broken.
  • the release of gas accompanying the operation of the cleavage valve 21 is converted into a two-dimensional phenomenon called a change in surface pressure, and the state change of the secondary battery 1 regardless of the installation position of the cleavage valve 21. Can be detected.
  • the two-dimensional phenomenon of change in surface pressure is further converted into a substantially one-dimensional change of change in the cross-sectional area of the conductive thin film 11 due to the breaking of the conductive thin film 11. Since the change in the cross-sectional area of the conductive thin film 11 can be converted into a change that can be easily detected electrically, such as a change in resistance value or a change in tension, the breaking of the conductive thin film 11 can be easily detected. In addition, since it is once converted into a two-dimensional phenomenon in the detection flow, detection is possible regardless of the installation position of the cleavage valve 21 as described above.
  • the resistance meter 12 measures the voltage or resistance generated when a current is passed through the conductive thin film 11, and measures the resistance of the conductive thin film 11 via the signal line 13. When the measured resistance value changes, it is determined that the conductive thin film 11 is broken, that is, the cleavage valve 21 is operated. Since the resistance value changes due to temperature and aging deterioration, it may be determined that the cleavage valve 21 is operated only when the resistance value suddenly changes.
  • the main method of the resistance meter 12 is to obtain a resistance value from a voltage generated when a current is passed through a measurement target, which can be realized with a small number of parts.
  • the conductive thin film 11 is desirably a resistor having an appropriate resistance value of, for example, 1 k ⁇ to 1 M ⁇ . Thereby, the power consumption of the resistance meter 12 can be reduced.
  • a tension meter may be used instead of the resistance meter 12. In this case, when a rapid decrease in tension occurs, it is determined that the cleavage valve 21 has been operated. With this configuration, not only the operation of the cleavage valve 21 but also the expansion of the secondary battery 1 can be detected.
  • the conductive thin film 11 is installed so as to block the duct 14 serving as a discharge path for the contents of the secondary battery 1 from the cleavage valve 21, and the resistance change is measured to measure the resistance change. Can be determined. With this method, it is possible to determine the operation of the cleavage valve 21 regardless of the installation position of the cleavage valve 21, so that the working accuracy of the cleavage valve 21 can be relaxed. In addition, since the conductive thin film 11 is quickly broken and an opening necessary for discharging from the secondary battery 1 is generated, it is possible to ensure both the area of the conductive thin film 11 and the opening.
  • FIG. 4 is a configuration diagram of a secondary battery system according to an embodiment of the present invention.
  • the secondary battery system 100 includes a plurality of secondary batteries 1, and detects any one of the cleavage valves 21 of each secondary battery 1 that operates.
  • the secondary battery 1 is installed side by side on a plane so that the cleavage valves 21 are arranged on the same plane.
  • the conductive thin film 11 covers each cleavage valve 21 with a single film. In other words, the conductive thin film 11 is continuously formed with respect to the cleavage valves 21 of the plurality of secondary batteries 1.
  • the resistance meter 12 measures the resistance with respect to the single film, and determines that the cleavage valve has operated when the resistance value changes suddenly.
  • the cross-sectional area of the conductive thin film 11 is reduced only by operating one of the cleavage valves 21 of each secondary battery 1, and it is detected that any of the cleavage valves 21 has been operated. it can. Further, the number of the conductive thin film 11, the resistance meter 12, and the signal line 13 necessary for this detection can be reduced as compared with the first embodiment.
  • each cleavage valve 21 is covered with one conductive thin film 11.
  • the film may be divided and an ohmmeter 12 and a signal line 13 may be attached to each.
  • the films may be divided, the respective films are connected by the signal line 13, and the resistance meter 12 may be one.
  • FIG. 5 is a configuration diagram of a conductive thin film according to an embodiment of the present invention.
  • the processed conductive thin film 11 in the first embodiment or the second embodiment will be described.
  • FIG. 5A shows the conductive thin film 11 having a small-diameter hole 31 formed therein.
  • the small-diameter hole 31 has a diameter of about 1 mm, for example.
  • FIG. 5B shows the conductive thin film 11 with a cut 32.
  • This notch 32 becomes the starting point of tearing, so that the tearing valve 21 can be reliably torn during operation.
  • the effect similar to the electroconductive thin film 11 is acquired by covering a part of the cut 32 with the cleavage valve 21.
  • a specific breakage portion 33 subjected to heat treatment, chemical treatment, thinning treatment, or the like is provided so that a part of the conductive thin film 11 is more easily broken than others. Thereby, it can prevent that a fracture

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne un système de batterie rechargeable avec lequel le fonctionnement d'une valve de rupture peut être détecté indépendamment de la position d'installation de la valve de rupture. Le système de batterie rechargeable comprend : une batterie rechargeable comportant une valve de rupture se rompant dans des conditions spécifiques ; un film conducteur mince installé au-dessus de la valve de rupture ; et un instrument de mesure mesurant la tension ou la résistance qui survient lorsqu'un courant circule à travers le film conducteur mince. Le film conducteur mince peut être installé de façon à entrer en contact avec la valve de rupture, le film conducteur mince peut être installé de manière à boucher un conduit, et la valeur de résistance du film conducteur mince peut être de 1 kΩ à 1 MΩ.
PCT/JP2017/038450 2016-11-08 2017-10-25 Système de batterie rechargeable WO2018088208A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016217730A JP2020024781A (ja) 2016-11-08 2016-11-08 二次電池システム
JP2016-217730 2016-11-08

Publications (1)

Publication Number Publication Date
WO2018088208A1 true WO2018088208A1 (fr) 2018-05-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/038450 WO2018088208A1 (fr) 2016-11-08 2017-10-25 Système de batterie rechargeable

Country Status (2)

Country Link
JP (1) JP2020024781A (fr)
WO (1) WO2018088208A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7210503B2 (ja) * 2020-04-28 2023-01-23 プライムアースＥｖエナジー株式会社 検出装置及び制御システム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08138649A (ja) * 1994-11-09 1996-05-31 Toray Ind Inc 非水系二次電池
JPH1131491A (ja) * 1997-07-09 1999-02-02 Matsushita Electric Ind Co Ltd 密閉型電池用防爆封口板およびその製造方法
JP2007265658A (ja) * 2006-03-27 2007-10-11 Denso Corp 蓄電素子モジュール
JP2010015956A (ja) * 2008-07-07 2010-01-21 Toyota Motor Corp 検出装置および蓄電装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08138649A (ja) * 1994-11-09 1996-05-31 Toray Ind Inc 非水系二次電池
JPH1131491A (ja) * 1997-07-09 1999-02-02 Matsushita Electric Ind Co Ltd 密閉型電池用防爆封口板およびその製造方法
JP2007265658A (ja) * 2006-03-27 2007-10-11 Denso Corp 蓄電素子モジュール
JP2010015956A (ja) * 2008-07-07 2010-01-21 Toyota Motor Corp 検出装置および蓄電装置

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