WO2016017567A1 - Élément de protection et circuit de protection - Google Patents

Élément de protection et circuit de protection Download PDF

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Publication number
WO2016017567A1
WO2016017567A1 PCT/JP2015/071205 JP2015071205W WO2016017567A1 WO 2016017567 A1 WO2016017567 A1 WO 2016017567A1 JP 2015071205 W JP2015071205 W JP 2015071205W WO 2016017567 A1 WO2016017567 A1 WO 2016017567A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating element
electrodes
electrode
soluble conductor
conductor
Prior art date
Application number
PCT/JP2015/071205
Other languages
English (en)
Japanese (ja)
Inventor
千智 小森
吉弘 米田
貴史 藤畑
Original Assignee
デクセリアルズ株式会社
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 デクセリアルズ株式会社 filed Critical デクセリアルズ株式会社
Publication of WO2016017567A1 publication Critical patent/WO2016017567A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material

Definitions

  • Some types of protection elements perform overcharge protection or overdischarge protection operation of the battery pack by turning on / off the output using an FET switch built in the battery pack.
  • FET switch When the FET switch is short-circuited for some reason, when a lightning surge or the like is applied and an instantaneous large current flows, the output voltage drops abnormally due to the life of the battery cell, or conversely an excessively abnormal voltage
  • a protection element made of a fuse element having a function of cutting off the current path by an external signal is used. .
  • this type of protective element has been used for applications with a relatively low current capacity, such as mobile phones and notebook computers, but the use of lithium-ion secondary batteries has been expanding in recent years, resulting in higher currents.
  • Applications for example, electric tools such as electric drivers, transportation equipment such as hybrid cars, electric vehicles, electric assist bicycles, etc. are being studied, and some are being adopted. In these applications, it is desired to realize a protection element that can handle a large current capacity.
  • the heating element extraction electrode functioning as the collector electrode of the molten conductor is omitted, the molten conductor stays in the region between the first and second electrodes located immediately above the heating element, and the first, There is also a possibility that the second electrode cannot be disconnected.
  • a protection circuit includes an energization circuit including first and second terminals connected to an external circuit, a fuse connecting the first terminal and the second terminal, and heat generation. And a power supply circuit that supplies power to the heat generating element.
  • the power supply circuit is connected to a control unit that controls power supply to the heat generating element.
  • the insulating member 17 covering the heating element 14 can be made of glass, for example.
  • the protection element 1 can efficiently transfer the heat of the heating element 14 to the first soluble conductor 13 by covering the heating element 14 with the insulating member 17.
  • the insulating member 17 may be laminated between the heating element 14 and the surface 10 a of the insulating substrate 10.
  • the first and second heating element electrodes 18 and 19 are formed on the front surface 10a of the insulating substrate 10 and connected to the first and second power supply terminals 18a and 19a formed on the back surface 10b of the insulating substrate 10, respectively. Has been.
  • the first and second heating element electrodes 18 and 19 are connected to an external circuit that supplies power to the heating element 14 when the protective element 1 is activated via the first and second feeding terminals 18a and 19a (FIG. 4). reference).
  • the flux 20 is applied to the upper part and / or the lower part of the first soluble conductor 13. .
  • the protective element 1 is provided with a cover member 21 that protects the inside of the insulating substrate 10.
  • the inside of the protection element 1 is protected by covering the insulating substrate 10 with the cover member 21.
  • the cover member 21 has a side wall 24 that constitutes a side surface of the protection element 1 and a top surface portion 25 that constitutes an upper surface of the protection element 1, and the side wall 24 is connected to the insulating substrate 10. It becomes a lid which covers the surface 10a of the.
  • the cover member 21 is formed using an insulating member such as a thermoplastic plastic, ceramics, or a glass epoxy substrate.
  • the battery pack 30 includes a battery stack 35, a first control unit 40 that controls charging / discharging of the battery stack 35, the protection element 1 to which the present invention that cuts off charging when the battery stack 35 is abnormal, and each battery. And a second control unit 41 that activates the protection element 1 in response to a voltage abnormality of the cells 31 to 34.
  • the current control element 37 is composed of, for example, an FET, and when the voltage value of the battery cells 31 to 34 exceeds a predetermined overdischarge or overcharge state by a detection signal output from the second control unit 41. Then, the power feeding circuit 3 is energized to control the charge / discharge current path of the battery stack 35 to be cut off regardless of the switching operation of the current control elements 42 and 43.
  • the second control unit 41 When the second control unit 41 detects any abnormal voltage of the battery cells 31 to 34, it outputs a cutoff signal to the current control element 37. Then, the current control element 37 controls the current so that the heating element 14 is energized. A current flows from the battery stack 35 to the power supply circuit 3 via the first power supply terminal 18a and the first heating element electrode 18, and the heating element 14 starts to generate heat. The protection element 1 melts the first soluble conductor 13 by the heat generated by the heating element 14.
  • a timer is set in the second control unit 41, and the power feeding circuit 3 of the heating element 14 is energized for a predetermined time sufficient to melt the first fusible conductor 13. Therefore, in the protection element 1, the heat generation of the heating element 14 is stopped after the first soluble conductor 13 is melted.
  • the second control unit 41 may vary the heat generation time according to the voltage of the battery cells 31 to 34 or the battery stack 35. For example, when the voltage of the battery cells 31 to 34 or the battery stack 35 is lowered, the amount of heat for reliably blocking the first fusible conductor 13 is ensured by increasing the energization time to the heating element 14. be able to.
  • the heating element 14 and one of the first and second electrodes 11 and 12 may be connected.
  • symbol is attached
  • the protective element 1 is insulated by the heating element 14 by using a material having excellent thermal conductivity such as fine ceramic as the material of the insulating substrate 10.
  • the first soluble conductor 13 can be heated and blown in the same manner as when formed on the surface 10 a of the substrate 10.
  • the protective element 60 is arranged with the first soluble conductor 13 superimposed on the heating element 14, and the second soluble conductor 61 is arranged at a position offset from the heating element 14. May be.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Fuses (AREA)

Abstract

L'invention concerne un élément de protection, dont la taille est réduite et la valeur nominale accrue et qui est susceptible de conserver des caractéristiques de fusibles, même dans des cas où une électrode de sortie d'élément chauffant n'est pas présente. L'élément de protection de l'invention comprend : un substrat isolant (10) doté de première et seconde électrodes (11, 12) ; un premier conducteur fusible (13) supporté par les première et seconde électrodes (11, 12) et provoquant un court-circuit entre les première et seconde électrodes (11, 12) ; et un élément chauffant (14) prévu dans une région (15) entre la première électrode (11) et la seconde électrode (12) et qui fusionne le premier conducteur fusible (13) par production de chaleur au moyen de l'application d'un courant. Le premier conducteur fusible (13) est superposé sur l'élément chauffant (14) dans la région (15) entre la première électrode (11) et la seconde électrode (12). La mouillabilité du conducteur fusible est améliorée en recouvrant au moins une surface d'un métal à faible point de fusion (13a) par un métal à haut point de fusion (13b), qui présente un point de fusion plus élevé que le métal à faible point de fusion (13a).
PCT/JP2015/071205 2014-08-01 2015-07-27 Élément de protection et circuit de protection WO2016017567A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-157668 2014-08-01
JP2014157668A JP2016035816A (ja) 2014-08-01 2014-08-01 保護素子及び保護回路

Publications (1)

Publication Number Publication Date
WO2016017567A1 true WO2016017567A1 (fr) 2016-02-04

Family

ID=55217468

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/071205 WO2016017567A1 (fr) 2014-08-01 2015-07-27 Élément de protection et circuit de protection

Country Status (3)

Country Link
JP (1) JP2016035816A (fr)
TW (1) TW201611069A (fr)
WO (1) WO2016017567A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107579195A (zh) * 2017-08-21 2018-01-12 广州市云通磁电股份有限公司 柱形动力电池及其组装方法
CN109074988A (zh) * 2016-03-23 2018-12-21 迪睿合株式会社 保护元件
CN114586253A (zh) * 2019-10-30 2022-06-03 迪睿合株式会社 保护元件及保护电路

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6959964B2 (ja) * 2016-03-23 2021-11-05 デクセリアルズ株式会社 保護素子
JP7089758B2 (ja) * 2018-09-12 2022-06-23 内橋エステック株式会社 保護素子
JP7433811B2 (ja) * 2019-08-23 2024-02-20 デクセリアルズ株式会社 ヒューズエレメント、ヒューズ素子および保護素子

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08236305A (ja) * 1995-02-28 1996-09-13 Sony Chem Corp 保護回路及び保護素子
JP2001035331A (ja) * 1999-07-19 2001-02-09 Sony Corp スイッチング素子
JP2010003665A (ja) * 2008-05-23 2010-01-07 Sony Chemical & Information Device Corp 保護素子及び二次電池装置
JP2012003878A (ja) * 2010-06-15 2012-01-05 Sony Chemical & Information Device Corp 保護素子、及び、保護素子の製造方法
JP2013149606A (ja) * 2011-12-19 2013-08-01 Dexerials Corp 保護素子、保護素子の製造方法、及び、保護素子が組み込まれたバッテリモジュール
JP2013229295A (ja) * 2012-03-29 2013-11-07 Dexerials Corp 保護素子

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08236305A (ja) * 1995-02-28 1996-09-13 Sony Chem Corp 保護回路及び保護素子
JP2001035331A (ja) * 1999-07-19 2001-02-09 Sony Corp スイッチング素子
JP2010003665A (ja) * 2008-05-23 2010-01-07 Sony Chemical & Information Device Corp 保護素子及び二次電池装置
JP2012003878A (ja) * 2010-06-15 2012-01-05 Sony Chemical & Information Device Corp 保護素子、及び、保護素子の製造方法
JP2013149606A (ja) * 2011-12-19 2013-08-01 Dexerials Corp 保護素子、保護素子の製造方法、及び、保護素子が組み込まれたバッテリモジュール
JP2013229295A (ja) * 2012-03-29 2013-11-07 Dexerials Corp 保護素子

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109074988A (zh) * 2016-03-23 2018-12-21 迪睿合株式会社 保护元件
CN109074988B (zh) * 2016-03-23 2020-03-06 迪睿合株式会社 保护元件
CN107579195A (zh) * 2017-08-21 2018-01-12 广州市云通磁电股份有限公司 柱形动力电池及其组装方法
CN114586253A (zh) * 2019-10-30 2022-06-03 迪睿合株式会社 保护元件及保护电路

Also Published As

Publication number Publication date
JP2016035816A (ja) 2016-03-17
TW201611069A (zh) 2016-03-16

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