JP2019075287A - Protection element - Google Patents

Protection element Download PDF

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JP2019075287A
JP2019075287A JP2017200826A JP2017200826A JP2019075287A JP 2019075287 A JP2019075287 A JP 2019075287A JP 2017200826 A JP2017200826 A JP 2017200826A JP 2017200826 A JP2017200826 A JP 2017200826A JP 2019075287 A JP2019075287 A JP 2019075287A
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plate
electrode
thermal energy
conductor
pair
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JP7029784B2 (en
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田中 嘉明
Yoshiaki Tanaka
嘉明 田中
彰博 窪田
Akihiro Kubota
彰博 窪田
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Uchihashi Estec Co Ltd
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Uchihashi Estec Co Ltd
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Priority to JP2017200826A priority Critical patent/JP7029784B2/en
Priority to PCT/JP2018/022882 priority patent/WO2019077798A1/en
Priority to CN201880002223.8A priority patent/CN109937463B/en
Priority to KR1020187032158A priority patent/KR102595612B1/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/74Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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

Abstract

To provide a protection element in which malfunction is less likely to occur, although a large current can be fed.SOLUTION: A protection element 10 includes a positive electrode 22 and a negative electrode 24, an inter-electrode conductor 26, a joint material 28, a compression coil spring, a heat energy feed zone 32, and a support material 34. The inter-electrode conductor 26 is placed across the positive electrode 22 and the negative electrode 24. The joint material 28 joins the inter-electrode conductor 26 to the positive electrode 22 and the negative electrode 24, respectively. The compression coil spring applies a separation force to the inter-electrode conductor 26. The heat energy feed zone 32 supplies heat energy to the joint material 28. One end 60 of one tabular part 50 of the positive electrode 22 spills out of support material 34. The one tabular part 50 is tabular. One end 64 of the other tabular part 54 of the negative electrode 24 spills out of the support material 34 in a direction different from the one tabular part 50. The other tabular part 54 is placed on the same plane as the one tabular part 50. The other tabular part 54 is tabular.SELECTED DRAWING: Figure 2

Description

本発明は、保護素子に関する。   The present invention relates to a protection device.

特許文献1は、保護素子にかかる発明を開示する。特許文献1にかかる保護素子においては、過電流の通電により発熱する過電流発熱性片の両端部の各端部を電極の対の各電極に直接接触させる。この接触のもとで過電流発熱性片の各端部と各電極とが互いに低融点可溶材で連結される。特許文献1にかかる保護素子においては、過電流発熱性片を電極から脱離させる応力熱エネルギーを保有させたバネを設けている。特許文献1にかかる保護素子においては、被保護機器の異常時に通電されて発熱し、その発生熱で低融点可溶材を溶融させる抵抗器が付加される。しかも、抵抗器の本体に絶縁被覆が設けられる。抵抗器本体の両端部が絶縁被覆を介して各電極に接触されている。   Patent Document 1 discloses an invention related to a protective element. In the protective element according to Patent Document 1, the respective end portions of both ends of the overcurrent heating piece which generates heat due to the application of the overcurrent are brought into direct contact with the electrodes of the pair of electrodes. Under this contact, each end of the over-current exothermic piece and each electrode are connected to each other by a low melting point fusible material. The protective element according to Patent Document 1 is provided with a spring that holds stress thermal energy that causes the overcurrent heating piece to be detached from the electrode. In the protective element according to Patent Document 1, a resistor is added which is energized when the device to be protected is abnormal to generate heat, and the generated heat melts the low melting point soluble material. Moreover, the main body of the resistor is provided with an insulating coating. Both ends of the resistor body are in contact with the electrodes via the insulating coating.

特許文献1に開示された保護素子によれば、直流加電のもとで使用しても、低融点合金のマイグレーションを排除して過電流遮断を適確に行い得る。   According to the protective element disclosed in Patent Document 1, even when used under direct current charging, the migration of the low melting point alloy can be eliminated and the overcurrent interruption can be properly performed.

特開2009−212006号公報JP, 2009-212006, A

しかしながら、特許文献1に開示された保護素子には、大きな電流が流れる回路を保護できる仕様にし難いという問題点がある。大きな電流が流れる回路を保護できる仕様にしようとすると、誤動作が生じやすくなる。本発明は、このような問題を解決するためになされたものである。本発明の目的は、流し得る電流の大きさの割に誤動作が生じ難い保護素子を提供することにある。   However, the protection element disclosed in Patent Document 1 has a problem that it is difficult to make a specification capable of protecting a circuit through which a large current flows. If a specification is made to protect a circuit through which a large current flows, a malfunction may easily occur. The present invention has been made to solve such problems. An object of the present invention is to provide a protective element which is less likely to cause a malfunction in spite of the magnitude of the current which can flow.

図面を参照し本発明の保護素子を説明する。なおこの欄で図中の符号を使用したのは発明の内容の理解を助けるためであって内容を図示した範囲に限定する意図ではない。   The protective element of the present invention will be described with reference to the drawings. It is to be noted that the use of reference numerals in the drawings in this section is for the purpose of assisting understanding of the contents of the invention, and is not intended to limit the contents to the illustrated range.

上述した課題を解決するために、本発明のある局面に従うと、保護素子10,310は、電極22,24の対と、電極間導体26と、接合材28と、弾性体30と、熱エネルギ供給部32と、保持体34,334とを備える。電極間導体26は、電極22,24の対間に配置される導体である。接合材28は、電極間導体26を電極22,24の対それぞれへ接合する。弾性体30が電極間導体26に分離力を加える。熱エネルギ供給部32は、接合材28へ熱エネルギを供給する。保持体34,334は、電極22,24の対、電極間導体26、接合材28、弾性体30、および、熱エネルギ供給部32を保持する。分離力は電極間導体26が電極22,24の対から離れる方向の力である。接合材28の強度が所定の温度で所定の強さを下回る。その所定の温度は熱エネルギ供給部32から熱エネルギが供給されることによって到達する温度である。所定の強さは分離力に耐える強さである。電極22,24の対の一方が、一方板状部50を有している。一方板状部50の一端60が保持体34,334の外にはみ出す。一方板状部50の他端62が接合材28によって電極間導体26に接合される。一方板状部50は板状である。電極22,24の対の他方が他方板状部54を有している。他方板状部54の一端64が一方板状部50とは異なる方向に向かって保持体34,334の外にはみ出す。他方板状部54の他端66が接合材28によって電極間導体26に接合される。他方板状部54は一方板状部50と同一平面上に配置される。他方板状部54は板状である。   In order to solve the problems described above, according to one aspect of the present invention, the protection elements 10 and 310 include a pair of electrodes 22 and 24, an interelectrode conductor 26, a bonding material 28, an elastic body 30, and thermal energy. A supply unit 32 and holding members 34 and 334 are provided. The interelectrode conductor 26 is a conductor disposed between the pair of electrodes 22 and 24. The bonding material 28 bonds the interelectrode conductor 26 to the pair of electrodes 22 and 24 respectively. The elastic body 30 applies a separation force to the interelectrode conductor 26. The thermal energy supply unit 32 supplies thermal energy to the bonding material 28. The holders 34 and 334 hold the pair of electrodes 22 and 24, the inter-electrode conductor 26, the bonding material 28, the elastic body 30, and the thermal energy supply unit 32. The separation force is a force in the direction in which the interelectrode conductor 26 is separated from the pair of electrodes 22, 24. The strength of the bonding material 28 falls below a predetermined strength at a predetermined temperature. The predetermined temperature is a temperature reached by the supply of thermal energy from the thermal energy supply unit 32. The predetermined strength is the strength to withstand the separation force. One of the pair of electrodes 22 and 24 has one plate portion 50. On the other hand, one end 60 of the plate-like portion 50 protrudes out of the holding body 34, 334. On the other hand, the other end 62 of the plate-like portion 50 is joined to the inter-electrode conductor 26 by the joining material 28. On the other hand, the plate-like portion 50 is plate-like. The other of the pair of electrodes 22 and 24 has the other plate-like portion 54. On the other hand, one end 64 of the plate-like portion 54 protrudes out of the holding body 34, 334 in a direction different from that of the one plate-like portion 50. The other end 66 of the plate-like portion 54 is joined to the inter-electrode conductor 26 by the joining material 28. The other plate-like portion 54 is disposed on the same plane as the one plate-like portion 50. The plate-like portion 54 is plate-like.

熱エネルギ供給部32が接合材28へ熱エネルギを供給することにより接合材28が所定の温度に到達すると接合材28の接合強度は所定の強さを下回る。接合材28の接合強度が所定の強さを下回ると接合材28は分離力に耐えられなくなる。分離力に耐えられなくなるので、弾性体30によって電極間導体26は電極22,24の対から離される。これにより電極22,24の対間の電流は遮断される。熱エネルギ供給部32が接合材28へ熱エネルギを供給するまで、電極22,24の対の一方から電極間導体26を経て電極22,24の対の他方へ電流を流すことが可能である。電流が流れることに伴い、電極22,24の対と、電極間導体26とは熱を発生させる。一方板状部50の一端60が保持体34,334の外にはみ出すので、電極22,24の対と電極間導体26とが生じさせた熱は、保持体34,334の外に流出する。他方板状部54の一端64が一方板状部50とは異なる方向に向かって保持体34,334の外にはみ出すので、電極22,24の対と電極間導体26とが生じさせた熱は、保持体34,334の外に流出する。他方板状部54が一方板状部50と同一平面上に配置される。一方板状部50の他端62と他方板状部54の他端66とが接合材28によって電極間導体26に接合される。これにより、電極22,24の対の一方から電極間導体26を経て電極22,24の対の他方へわたる電流の経路のうち次に述べられる部分が同一平面上に配置されることとなる。その部分は、一方板状部50により形成される部分、および、他方板状部54により形成される部分である。電流の経路のある部分が同一平面上に配置されると、その部分が同一平面上にない場合に比べ、その部分の電流の経路の距離が抑えられる。距離が抑えられると電気抵抗は小さくなる。電気抵抗が小さくなると流れる電流の大きさの割に発熱量は少なくなる。一方板状部50は板状である。他方板状部54も板状である。板状の電極は、直径がその板状の電極の厚さと等しい線状の電極に比べて、電気抵抗が小さい。電気抵抗が小さくなると流れる電流の大きさの割に発熱量は少なくなる。電極22,24の対が生じさせた熱が少なく、かつ、その熱が保持体34,334の外に流出すると、そうでない場合に比べ、接合材28の温度は上昇し難くなる。接合材28の温度が上昇し難いと、その温度が上昇しやすい場合に比べ、電極22,24の対が発生させる熱によって接合材28の接合強度が所定の強さを下回る可能性は低くなる。その可能性が低くなると、流れる電流の大きさの割に誤動作が生じ難くなる。その結果、流し得る電流の大きさの割に誤動作が生じ難い保護素子を提供できる。   When the bonding material 28 reaches a predetermined temperature by the thermal energy supply unit 32 supplying thermal energy to the bonding material 28, the bonding strength of the bonding material 28 falls below the predetermined strength. When the bonding strength of the bonding material 28 falls below a predetermined strength, the bonding material 28 can not withstand the separation force. The elastic body 30 separates the interelectrode conductor 26 from the pair of electrodes 22 and 24 because the separation force can not be tolerated. As a result, the current between the pair of electrodes 22 and 24 is cut off. It is possible to flow current from one of the pair of electrodes 22, 24 through the interelectrode conductor 26 to the other of the pair of electrodes 22, 24 until the thermal energy supply 32 supplies thermal energy to the bonding material 28. As the current flows, the pair of electrodes 22 and 24 and the interelectrode conductor 26 generate heat. On the other hand, since one end 60 of the plate-like portion 50 protrudes out of the holding body 34, 334, the heat generated by the pair of electrodes 22, 24 and the interelectrode conductor 26 flows out of the holding body 34, 334. On the other hand, since one end 64 of the plate-like portion 54 protrudes out of the holding body 34, 334 in a direction different from that of the one plate-like portion 50, the heat generated by the pair of electrodes 22, 24 and the inter-electrode conductor 26 is , Flow out of the holding body 34,334. The other plate portion 54 is disposed on the same plane as the one plate portion 50. The other end 62 of the one plate portion 50 and the other end 66 of the other plate portion 54 are joined to the interelectrode conductor 26 by the joining material 28. As a result, a portion of the current path extending from one of the pair of electrodes 22 and 24 to the other of the pair of electrodes 22 and 24 via the interelectrode conductor 26 is disposed on the same plane. The portion is a portion formed by the one plate portion 50 and a portion formed by the other plate portion 54. When a portion of the current path is disposed on the same plane, the distance of the current path of the portion is reduced as compared to the case where the portion is not on the same plane. When the distance is reduced, the electrical resistance decreases. As the electric resistance decreases, the amount of heat generation decreases in proportion to the magnitude of the flowing current. On the other hand, the plate-like portion 50 is plate-like. The plate-like portion 54 is also plate-like. The plate-like electrode has a smaller electrical resistance than a linear electrode whose diameter is equal to the thickness of the plate-like electrode. As the electric resistance decreases, the amount of heat generation decreases in proportion to the magnitude of the flowing current. If the heat generated by the pair of electrodes 22 and 24 is small and the heat flows out of the holding body 34 and 334, the temperature of the bonding material 28 is less likely to rise as compared with the case where it is not. If the temperature of the bonding material 28 does not easily rise, the possibility that the bonding strength of the bonding material 28 falls below a predetermined strength due to the heat generated by the pair of electrodes 22 and 24 is lower than when the temperature easily rises. . If the possibility becomes low, it becomes difficult for a malfunction to occur in proportion to the magnitude of the flowing current. As a result, it is possible to provide a protective element which is less likely to cause a malfunction in spite of the magnitude of the current that can be flowed.

また、上述した電極22,24の対の一方が、一方板状部50に加え、一方支持部52,352を有していることが望ましい。一方支持部52,352は、保持体34,334に接することで一方板状部50の他端62を支えるよう一方板状部50の他端62に設けられる。この場合、電極22,24の対の他方が、他方板状部54に加え、他方支持部56,356を有していることが望ましい。他方支持部56,356は、保持体34,334に接することで他方板状部54の他端66を支えるよう他方板状部54の他端66に設けられる。   Further, it is desirable that one of the pair of electrodes 22 and 24 described above has the one support portion 52 and 352 in addition to the one plate portion 50. On the other hand, the support portions 52 and 352 are provided on the other end 62 of the one plate portion 50 so as to support the other end 62 of the one plate portion 50 by being in contact with the holding members 34 and 334. In this case, it is desirable that the other of the pair of electrodes 22 and 24 have the other support 56 and 356 in addition to the other plate 54. The other support portions 56 and 356 are provided on the other end 66 of the other plate-like portion 54 so as to support the other end 66 of the other plate-like portion 54 by being in contact with the holding members 34 and 334.

一方支持部52,352が保持体34,334に接することで一方板状部50の他端62を支える。他方支持部56,356が保持体34,334に接することで他方板状部54の他端66を支える。これにより、支えられない場合に比べ、一方板状部50および他方板状部54の位置が安定する。位置が安定すると、電流の経路が安定する。電流の経路が安定すると、電流の経路の長さも安定する。その長さが安定すると、流れる電流の大きさの割に誤動作が生じ難くなる。   On the other hand, the support portions 52 and 352 contact the holding members 34 and 334 to support the other end 62 of the one plate portion 50. The other support portion 56, 356 contacts the holding body 34, 334 to support the other end 66 of the other plate-like portion 54. Thereby, compared with the case where it can not support, the position of the one plate-like-part 50 and the other plate-like-part 54 is stabilized. When the position is stabilized, the current path is stabilized. When the current path is stabilized, the length of the current path is also stabilized. When the length is stabilized, a malfunction does not easily occur in proportion to the magnitude of the flowing current.

もしくは、上述した一方支持部52が、一方接触部80と、一方連結部82とを有していることが望ましい。一方接触部80は、保持体34に接触する。一方接触部80は、一方板状部50に対向する。一方接触部80は、金属製である。一方連結部82は、一方接触部80の一端100と一方板状部50の他端62とを連結する。一方連結部82は、金属製である。この場合、他方支持部56が、他方接触部86と、他方連結部88とを有していることが望ましい。他方接触部86は、保持体34に接触する。他方接触部86は、他方板状部54に対向する。他方接触部86は、金属製である。他方連結部88は、他方接触部86の一端102と他方板状部54の他端66とを連結する。他方連結部88は、金属製である。   Alternatively, it is desirable that the above-described one-side support portion 52 includes the one-side contact portion 80 and the one-side connection portion 82. On the other hand, the contact portion 80 contacts the holder 34. On the other hand, the contact portion 80 faces the one plate portion 50. On the other hand, the contact portion 80 is made of metal. On the other hand, the connection portion 82 connects one end 100 of the one contact portion 80 and the other end 62 of the one plate portion 50. On the other hand, the connecting portion 82 is made of metal. In this case, it is desirable that the other support portion 56 have the other contact portion 86 and the other connection portion 88. The contact portion 86 contacts the holder 34. The other contact portion 86 faces the other plate portion 54. The other contact portion 86 is made of metal. The other connection portion 88 connects one end 102 of the other contact portion 86 and the other end 66 of the other plate-like portion 54. On the other hand, the connecting portion 88 is made of metal.

一方接触部80が一方板状部50に対向し、かつ、他方接触部86が他方板状部54に対向すると、次に述べられる場合に比べて、電極22,24の対の間隔を狭くできる。その場合とは、一方接触部80が一方連結部82から見て一方板状部50と反対側に配置される場合、および、他方接触部86が他方接触部86から見て他方板状部54と反対側に配置される場合である。一方接触部80が保持体34に接触し、一方連結部82が一方接触部80の一端100と一方板状部50の他端62とを連結する。一方接触部80および一方連結部82が金属製である。他方接触部86が保持体34に接触し、他方連結部88が他方接触部86の一端102と他方板状部54の他端66とを連結する。他方接触部86および他方連結部88が金属製である。これにより、次に述べられる場合に比べ、一方板状部50と他方板状部54と電極間導体26において生じた熱が一方支持部52および他方支持部56へ多く伝わる。その場合とは、一方連結部82が直接保持体34に接触する場合、および、他方連結部88が直接保持体34に接触する場合である。熱が多く伝わるので、接合材28の温度は上昇し難くなる。接合材28の温度が上昇し難いと、その温度が上昇しやすい場合に比べ、流れる電流の大きさの割に誤動作が生じ難くなる。   When the one contact portion 80 faces the one plate portion 50 and the other contact portion 86 faces the other plate portion 54, the distance between the pair of electrodes 22 and 24 can be narrowed compared to the case described next. . In this case, when the one contact portion 80 is disposed on the opposite side of the one plate portion 50 as viewed from the one connection portion 82, and the other plate portion 54 as viewed from the other contact portion 86. And the case where it is arranged on the opposite side. The one-side contact portion 80 contacts the holder 34, and the one-side connection portion 82 connects the one end 100 of the one-side contact portion 80 and the other end 62 of the one-plate portion 50. The one-side contact portion 80 and the one-side connection portion 82 are made of metal. The other contact portion 86 contacts the holder 34, and the other connection portion 88 connects one end 102 of the other contact portion 86 and the other end 66 of the other plate-like portion 54. The other contact portion 86 and the other connection portion 88 are made of metal. Thereby, heat generated in the one plate portion 50, the other plate portion 54, and the interelectrode conductor 26 is transmitted to the one support portion 52 and the other support portion 56 more than in the case described below. In that case, one connection portion 82 directly contacts the holder 34, and the other connection portion 88 directly contacts the holder 34. Since much heat is transmitted, the temperature of the bonding material 28 hardly rises. If the temperature of the bonding material 28 does not easily rise, a malfunction will not easily occur in proportion to the magnitude of the flowing current, as compared to the case where the temperature tends to rise.

もしくは、上述した熱エネルギ供給部32が、一方熱エネルギ生成部120と、他方熱エネルギ生成部122と、電力供給導体124とを有していることが望ましい。一方熱エネルギ生成部120は、一方板状部50と接触する。一方熱エネルギ生成部120は、一方板状部50の他端62を介して接合材28と対向する。一方熱エネルギ生成部120は、一方連結部82と接触する。一方熱エネルギ生成部120は、一方接触部80と接触する。一方熱エネルギ生成部120は、電力を受けて熱エネルギを生成する。他方熱エネルギ生成部122は、他方板状部54と接触する。他方熱エネルギ生成部122は、他方板状部54の他端66を介して接合材28と対向する。他方熱エネルギ生成部122は、他方連結部88と接触する。他方熱エネルギ生成部122は、他方接触部86と接触する。他方熱エネルギ生成部122は、電力を受けて熱エネルギを生成する。電力供給導体124は、一方熱エネルギ生成部120および他方熱エネルギ生成部122に電力を供給する導体である。   Alternatively, it is preferable that the above-described thermal energy supply unit 32 includes a thermal energy generation unit 120, a thermal energy generation unit 122, and a power supply conductor 124. On the other hand, the thermal energy generation unit 120 contacts the one plate portion 50. On the other hand, the thermal energy generating unit 120 faces the bonding material 28 via the other end 62 of the one plate portion 50. On the other hand, the thermal energy generation unit 120 contacts the one connection unit 82. On the other hand, the thermal energy generating unit 120 contacts the one contact unit 80. Meanwhile, the thermal energy generation unit 120 receives the power and generates thermal energy. On the other hand, the thermal energy generating unit 122 contacts the other plate-like portion 54. On the other hand, the thermal energy generating unit 122 faces the bonding material 28 via the other end 66 of the other plate-like portion 54. On the other hand, the thermal energy generating unit 122 is in contact with the other connecting unit 88. On the other hand, the thermal energy generating unit 122 contacts the other contact unit 86. On the other hand, the thermal energy generation unit 122 receives the power and generates thermal energy. The power supply conductor 124 is a conductor that supplies power to the thermal energy generation unit 120 and the thermal energy generation unit 122.

電力供給導体124が、一方熱エネルギ生成部120および他方熱エネルギ生成部122に電力を供給する。一方熱エネルギ生成部120は、電力を受けて熱エネルギを生成する。一方熱エネルギ生成部120も、電力を受けて熱エネルギを生成する。一方熱エネルギ生成部120は、一方板状部50の他端62を介して接合材28と対向する。一方熱エネルギ生成部120は、一方板状部50、一方連結部82、および、一方接触部80と接触する。他方熱エネルギ生成部122は、他方板状部54の他端66を介して接合材28と対向する。他方熱エネルギ生成部122は、他方板状部54、他方連結部88、および、他方接触部86と接触する。これにより、一方熱エネルギ生成部120および他方熱エネルギ生成部122が生成した熱エネルギが接合材28によく伝わる。それらの熱エネルギが良く伝わると、そうでない場合に比べ、熱エネルギ供給部32が熱エネルギを供給することに起因する接合材28の温度上昇は生じ易くなる。その結果、流れる電流の大きさの割に誤動作が生じ難くなる。   The power supply conductor 124 supplies power to the one side thermal energy generating unit 120 and the other side thermal energy generating unit 122. Meanwhile, the thermal energy generation unit 120 receives the power and generates thermal energy. Meanwhile, the thermal energy generation unit 120 also receives the power and generates thermal energy. On the other hand, the thermal energy generating unit 120 faces the bonding material 28 via the other end 62 of the one plate portion 50. On the other hand, the thermal energy generating unit 120 is in contact with the one plate portion 50, the one coupling portion 82, and the one contact portion 80. On the other hand, the thermal energy generating unit 122 faces the bonding material 28 via the other end 66 of the other plate-like portion 54. On the other hand, the thermal energy generating portion 122 is in contact with the other plate portion 54, the other connecting portion 88, and the other contact portion 86. As a result, the thermal energy generated by the one-side thermal energy generation unit 120 and the other-side thermal energy generation unit 122 is well transmitted to the bonding material 28. When the thermal energy is well transmitted, the temperature rise of the bonding material 28 due to the thermal energy supply unit 32 supplying thermal energy is more likely to occur than in the case where the thermal energy is not transmitted well. As a result, malfunction is less likely to occur in proportion to the magnitude of the flowing current.

もしくは、上述した保護素子10,310が、空間形成体36をさらに備えることが望ましい。空間形成体36は、一方板状部50から見て一方熱エネルギ生成部120とは反対側および他方板状部54から見て他方熱エネルギ生成部122とは反対側に空間を形成する。   Alternatively, it is desirable that the above-described protective element 10, 310 further include the space forming body 36. The space forming member 36 forms a space on the side opposite to the one side of the thermal energy generating portion 120 as viewed from the one plate portion 50 and on the opposite side as the other side of the thermal energy generating portion 122 as viewed from the other side.

空間形成体36が、一方板状部50から見て一方熱エネルギ生成部120とは反対側および他方板状部54から見て他方熱エネルギ生成部122とは反対側に外部と連通する空間を形成する。これにより、そこに空間よりも断熱性の高い物質が存在する場合に比べ、そこに電極22,24の対と電極間導体26とが発生させた熱が排出され易くなる。その熱が排出され易いので、流れる電流の大きさの割に誤動作が生じ難くなる。   A space forming body 36 communicates with the outside on the side opposite to the heat energy generating portion 120 as viewed from the one plate portion 50 and on the other side as viewed from the other plate portion 54 and the other side as the heat energy generating portion 122 Form. As a result, the heat generated by the pair of electrodes 22 and 24 and the interelectrode conductor 26 is more easily discharged, as compared with the case where a material having a higher heat insulating property than the space is present there. Since the heat is easily discharged, a malfunction does not easily occur in proportion to the magnitude of the flowing current.

また、上述した保持体34,334が、基礎となる底部130と、一方電極固定部132と、他方電極固定部134とを有していることが望ましい。一方電極固定部132は、底部130から立つように設けられる。一方電極固定部132には、一方板状部50が固定される。一方板状部50は、底部130との間に間隔を開けて配置されるように固定される。一方板状部50は、熱エネルギ供給部32に対向するよう固定される。他方電極固定部134は、底部130から一方電極固定部132に対向して立つように設けられる。他方電極固定部134には、他方板状部54が固定される。他方板状部54は、他方板状部54が一方板状部50と同一平面上に配置されるように固定される。他方板状部54は、他方板状部54が底部130との間に間隔を開けて配置されるように固定される。他方板状部54は、他方板状部54が熱エネルギ供給部32に対向するように固定される。   In addition, it is desirable that the above-described holder 34 and 334 have a bottom 130 serving as a base, a first electrode fixing portion 132, and a second electrode fixing portion 134. On the other hand, the electrode fixing portion 132 is provided to stand from the bottom portion 130. The one plate portion 50 is fixed to the electrode fixing portion 132. Meanwhile, the plate-like portion 50 is fixed so as to be spaced apart from the bottom portion 130. On the other hand, the plate-like portion 50 is fixed to face the thermal energy supply portion 32. The other electrode fixing portion 134 is provided to stand from the bottom portion 130 so as to face the one electrode fixing portion 132. The other plate-like portion 54 is fixed to the other electrode fixing portion 134. The other plate-like portion 54 is fixed so that the other plate-like portion 54 is disposed on the same plane as the one plate-like portion 50. The other plate-like portion 54 is fixed so that the other plate-like portion 54 is spaced apart from the bottom portion 130. The other plate-like portion 54 is fixed so that the other plate-like portion 54 faces the thermal energy supply portion 32.

一方電極固定部132には、一方板状部50が上述されたように固定される。他方電極固定部134には、他方板状部54が上述されたように固定される。これにより、一方板状部50および他方板状部54と底部130との間に熱エネルギ供給部32が配置されることとなる。ここに熱エネルギ供給部32が配置されることで、熱エネルギ供給部32が供給する熱エネルギが一方板状部50および他方板状部54に供給され易くなる。熱エネルギが供給され易くなると、熱エネルギ供給部32が熱エネルギを供給することに起因する接合材28の温度上昇は生じ易くなる。その結果、流れる電流の大きさの割に誤動作が生じ難くなる。   The one plate portion 50 is fixed to the electrode fixing portion 132 as described above. The other plate-like portion 54 is fixed to the other electrode fixing portion 134 as described above. As a result, the thermal energy supply portion 32 is disposed between the one plate portion 50 and the other plate portion 54 and the bottom portion 130. By arranging the thermal energy supply unit 32 here, the thermal energy supplied by the thermal energy supply unit 32 can be easily supplied to the one plate portion 50 and the other plate portion 54. When the thermal energy is easily supplied, the temperature rise of the bonding material 28 due to the thermal energy supply unit 32 supplying the thermal energy tends to occur. As a result, malfunction is less likely to occur in proportion to the magnitude of the flowing current.

もしくは、上述した一方電極固定部132が、一方電極脇固定部140の対と、一方電極支持部142とを有していることが望ましい。一方電極脇固定部140の対は、底部130から立つように設けられる。一方電極脇固定部140の対は、一方板状部50を挟んで固定するように配置される。一方電極支持部142は、一方電極脇固定部140の対の間において底部130から立つように設けられる。一方電極支持部142が、一方平坦面150を有している。一方平坦面150は、一方電極脇固定部140よりも他方電極固定部134側に張出して一方板状部50を支える。他方電極固定部134が、他方電極脇固定部146の対と、他方電極支持部148とを有していることが望ましい。他方電極脇固定部146の対は、底部130から一方電極固定部132に対向して立つように設けられる。他方電極脇固定部146の対は、他方板状部54を挟んで固定するように配置される。他方電極支持部148は、他方電極脇固定部146の対の間において底部130から一方電極支持部142に対向して立つように設けられる。他方電極支持部148が、他方平坦面156を有している。他方平坦面156は、一方平坦面150と同一平面上に配置される。他方平坦面156は、他方電極脇固定部146よりも一方電極固定部132側に張出して他方板状部54を支える。   Alternatively, it is desirable that the above-described one-electrode fixing portion 132 has a pair of one-electrode side fixing portions 140 and a one-electrode support portion 142. On the other hand, the pair of electrode side fixing parts 140 is provided to stand from the bottom part 130. On the other hand, the pair of electrode side fixing portions 140 is disposed so as to fix the one plate portion 50 therebetween. On the other hand, the electrode support portion 142 is provided to stand from the bottom portion 130 between the pair of the electrode side fixing portions 140. On the other hand, the electrode support portion 142 has a flat surface 150. On the other hand, the flat surface 150 protrudes toward the other electrode fixing portion 134 side than the one electrode side fixing portion 140 and supports the one plate portion 50. It is desirable that the other electrode fixing portion 134 have a pair of the other electrode side fixing portion 146 and the other electrode support portion 148. On the other hand, the pair of electrode side fixing portions 146 is provided to stand from the bottom portion 130 to face the one electrode fixing portion 132. On the other hand, the pair of electrode side fixing portions 146 is disposed so as to fix the other plate-like portion 54 therebetween. The other electrode support portion 148 is provided to stand from the bottom portion 130 to face the one electrode support portion 142 between the pair of the other electrode side fixing portions 146. The other electrode support portion 148 has the other flat surface 156. On the other hand, the flat surface 156 is arranged on the same plane as the one flat surface 150. On the other hand, the flat surface 156 projects toward the one electrode fixing portion 132 side with respect to the other electrode side fixing portion 146 to support the other plate-like portion 54.

一方電極固定部132が、一方電極脇固定部140の対と、一方電極支持部142とを有していると、一方板状部50の位置および他方板状部54の位置が安定する。一方平坦面150が他方電極固定部134側に張出して一方板状部50を支えると、そうでない場合に比べ、一方板状部50の位置が安定する。他方平坦面156が一方電極固定部132側に張出して他方板状部54を支えると、そうでない場合に比べ、他方板状部54の位置が安定する。これにより、電流の経路が安定する。電流の経路が安定すると、流れる電流の大きさの割に誤動作が生じ難くなる。   When the one electrode fixing portion 132 includes the pair of one electrode side fixing portions 140 and the one electrode support portion 142, the position of the one plate portion 50 and the position of the other plate portion 54 become stable. When the flat surface 150 projects toward the other electrode fixing portion 134 to support the one plate portion 50, the position of the one plate portion 50 is stabilized as compared with the case where it is not so. On the other hand, when the flat surface 156 overhangs the one electrode fixing portion 132 and supports the other plate-like portion 54, the position of the other plate-like portion 54 is stabilized as compared with the case where it is not so. This stabilizes the current path. When the current path is stabilized, it becomes difficult to cause a malfunction due to the magnitude of the flowing current.

本発明によれば、流し得る電流の大きさの割に誤動作が生じ難い保護素子を提供できる。   According to the present invention, it is possible to provide a protective element which is less likely to cause a malfunction in spite of the magnitude of the current that can flow.

本発明のある実施形態にかかる二次電池保護回路の回路図である。FIG. 1 is a circuit diagram of a secondary battery protection circuit according to an embodiment of the present invention. 本発明のある実施形態にかかる保護素子の、空間形成体が除去された状態での斜視図である。FIG. 7 is a perspective view of the protection device according to an embodiment of the present invention in a state in which the space forming body is removed. 図2のA−A断面図である。It is AA sectional drawing of FIG. 本発明のある実施形態にかかる保護素子の、電極などが除去された状態での斜視図である。It is a perspective view in the state where an electrode etc. were removed, of a protection element concerning an embodiment of the present invention. 本発明のある変形例にかかる保護素子の断面図である。FIG. 7 is a cross-sectional view of a protection device according to a certain modified embodiment of the present invention.

以下、本発明について図面に基づき詳細に説明する。以下の説明では、同一の部品には同一の符号を付してある。それらの名称及び機能も同一である。従って、それらについての詳細な説明は繰り返さない。   Hereinafter, the present invention will be described in detail based on the drawings. In the following description, the same components are denoted by the same reference numerals. Their names and functions are also identical. Therefore, the detailed description about them is not repeated.

[二次電池保護回路の説明]
図1は本実施形態にかかる二次電池保護回路を示している。本実施形態にかかる二次電池保護回路は、負荷200と、充電電源202と、スイッチ204と、制御素子206と、保護素子10とを備える。周知のトランジスターはスイッチ204として利用できる素子の一種である。制御素子206は二次電池220の過充電もしくは過放電を検知する。制御素子206は、それらのうち少なくとも1つを検知するとスイッチ204へスイッチオン信号を発信する。スイッチ204は、スイッチオン信号を受信すると「オン」状態となる。これにより、スイッチ204を経て電流が流れることとなる。保護素子10は、過電流、過充電、及び、過放電のいずれかが生じた場合に二次電池220を負荷200もしくは充電電源202から遮断する。
[Description of Secondary Battery Protection Circuit]
FIG. 1 shows a secondary battery protection circuit according to the present embodiment. The secondary battery protection circuit according to the present embodiment includes a load 200, a charging power supply 202, a switch 204, a control element 206, and a protection element 10. A known transistor is a type of element that can be used as the switch 204. Control element 206 detects overcharging or overdischarging of secondary battery 220. The control element 206 sends a switch on signal to the switch 204 when it detects at least one of them. When the switch 204 receives the switch on signal, the switch 204 is in the “on” state. As a result, current flows through the switch 204. The protection element 10 disconnects the secondary battery 220 from the load 200 or the charging power source 202 when any of an overcurrent, an overcharge, and an overdischarge occurs.

[構成の説明]
図2は、本実施形態にかかる保護素子10の斜視図である。図2において保護素子10は組み立てられた状態で示されている。この図において、保護素子10の一部は取り除かれている。図3は図2のA−A断面図である。図2と図3とに基づいて、本実施形態にかかる保護素子10の構成を説明する。
[Description of configuration]
FIG. 2 is a perspective view of the protective element 10 according to the present embodiment. In FIG. 2 the protective element 10 is shown in the assembled state. In this figure, part of the protection element 10 is removed. FIG. 3 is a cross-sectional view taken along line A-A of FIG. The configuration of the protective element 10 according to the present embodiment will be described based on FIGS. 2 and 3.

本実施形態にかかる保護素子10は、正極22と、負極24と、電極間導体26と、接合材28と、圧縮コイルバネ30と、熱エネルギ供給部32と、保持体34と、空間形成体36と、リード用絶縁体38とを備える。   The protective element 10 according to the present embodiment includes the positive electrode 22, the negative electrode 24, the inter-electrode conductor 26, the bonding material 28, the compression coil spring 30, the thermal energy supply unit 32, the holding body 34, and the space forming body 36. And a lead insulator 38.

正極22と負極24とは電極である。これらを介して本実施形態にかかる保護素子10に電流が流れる。本実施形態においては、正極22は二次電池220に接続される。負極24は負荷200および充電電源202に接続される。本実施形態においては、正極22と負極24とは互いに対向するよう配置される。電極間導体26は、正極22と負極24との間にまたがって配置される導体である。本実施形態の場合、接合材28は電極間導体26を正極22に接合する。本実施形態の場合、別の接合材28は電極間導体26を負極24に接合する。圧縮コイルバネ30は、正極22と負極24との間に配置される。圧縮コイルバネ30が電極間導体26に分離力を加える。分離力は電極間導体26が正極22および負極24から離れる方向の力である。熱エネルギ供給部32は、接合材28へ熱エネルギを供給する。保持体34は、正極22、負極24、電極間導体26、接合材28、圧縮コイルバネ30、および、熱エネルギ供給部32を保持する。保持体34は耐熱性を有する。空間形成体36は、保持体34に接続される。空間形成体36は、正極22、負極24、および、電極間導体26の周りに空間を形成する。この空間は保護素子10の外部と連通する空間である。リード用絶縁体38は、電極間導体26と圧縮コイルバネ30とが直接接触することを防止する。これにより電極間導体26と圧縮コイルバネ30との間が絶縁される。   The positive electrode 22 and the negative electrode 24 are electrodes. A current flows through the protective element 10 according to the present embodiment through these. In the present embodiment, the positive electrode 22 is connected to the secondary battery 220. Negative electrode 24 is connected to load 200 and charging power supply 202. In the present embodiment, the positive electrode 22 and the negative electrode 24 are disposed to face each other. The inter-electrode conductor 26 is a conductor disposed across the positive electrode 22 and the negative electrode 24. In the case of the present embodiment, the bonding material 28 bonds the interelectrode conductor 26 to the positive electrode 22. In the case of the present embodiment, another bonding material 28 bonds the interelectrode conductor 26 to the negative electrode 24. The compression coil spring 30 is disposed between the positive electrode 22 and the negative electrode 24. The compression coil spring 30 applies a separation force to the interelectrode conductor 26. The separation force is a force in the direction in which the interelectrode conductor 26 is separated from the positive electrode 22 and the negative electrode 24. The thermal energy supply unit 32 supplies thermal energy to the bonding material 28. The holder 34 holds the positive electrode 22, the negative electrode 24, the inter-electrode conductor 26, the bonding material 28, the compression coil spring 30, and the thermal energy supply unit 32. The holding body 34 has heat resistance. The space former 36 is connected to the holder 34. The space formation body 36 forms a space around the positive electrode 22, the negative electrode 24, and the interelectrode conductor 26. This space is a space communicating with the outside of the protection element 10. The lead insulator 38 prevents the interelectrode conductor 26 and the compression coil spring 30 from being in direct contact with each other. Thereby, the interelectrode conductor 26 and the compression coil spring 30 are insulated.

正極22は、一方板状部50と、一方支持部52とを有している。一方板状部50の一端60が保持体34の外にはみ出す。一方板状部50の他端62が接合材28によって電極間導体26に接合される。一方板状部50は板状である。一方支持部52は、一方板状部50の他端62に設けられる。一方支持部52は、保持体34に接することで一方板状部50の他端62を支える。   The positive electrode 22 has a one-plate portion 50 and a one-side support 52. On the other hand, one end 60 of the plate-like portion 50 protrudes out of the holder 34. On the other hand, the other end 62 of the plate-like portion 50 is joined to the inter-electrode conductor 26 by the joining material 28. On the other hand, the plate-like portion 50 is plate-like. On the other hand, the support portion 52 is provided at the other end 62 of the one plate portion 50. On the other hand, the support portion 52 supports the other end 62 of the one plate portion 50 by being in contact with the holding body 34.

一方支持部52は、一方接触部80と、一方連結部82とを有している。一方接触部80は、保持体34に接触する。一方接触部80は、一方板状部50に対向する。一方連結部82は、一方接触部80の一端100と一方板状部50の他端62とを連結する。その結果、本実施形態においては、側面から見た正極22の形は「J」という文字に似ている。   On the other hand, the support portion 52 has a one-side contact portion 80 and a one-side connection portion 82. On the other hand, the contact portion 80 contacts the holder 34. On the other hand, the contact portion 80 faces the one plate portion 50. On the other hand, the connection portion 82 connects one end 100 of the one contact portion 80 and the other end 62 of the one plate portion 50. As a result, in the present embodiment, the shape of the positive electrode 22 viewed from the side is similar to the letter “J”.

本実施形態の場合、正極22は一体となっている。したがって、一方板状部50と、一方接触部80と、一方連結部82とは、金属製である。より具体的には、これらは銅製である。   In the case of the present embodiment, the positive electrode 22 is integrated. Therefore, the one plate portion 50, the one contact portion 80, and the one connection portion 82 are made of metal. More specifically, they are made of copper.

負極24は、他方板状部54と、他方支持部56とを有している。他方板状部54の一端64が一方板状部50とは正反対の方向に向かって保持体34の外にはみ出す。他方板状部54の他端66が接合材28によって電極間導体26に接合される。他方板状部54は一方板状部50と同一平面上に配置される。ここで言う「同一平面」とは、一方板状部50と他方板状部54との間に電極間導体26を載せて接合材28で接続できる程度に高低差が少ないことを意味する。他方板状部54は板状である。他方支持部56は、他方板状部54の他端66に設けられる。他方支持部56は、保持体34に接することで他方板状部54の他端66を支える。   The negative electrode 24 has the other plate-like portion 54 and the other support portion 56. On the other hand, one end 64 of the plate-like portion 54 protrudes out of the holding body 34 in the direction exactly opposite to that of the one plate-like portion 50. The other end 66 of the plate-like portion 54 is joined to the inter-electrode conductor 26 by the joining material 28. The other plate-like portion 54 is disposed on the same plane as the one plate-like portion 50. Here, “the same plane” means that the height difference is small enough to place the inter-electrode conductor 26 between the one plate portion 50 and the other plate portion 54 and connect them with the bonding material 28. The plate-like portion 54 is plate-like. The other support portion 56 is provided at the other end 66 of the other plate portion 54. The other support portion 56 supports the other end 66 of the other plate-like portion 54 by being in contact with the holding body 34.

他方支持部56は、他方接触部86と、他方連結部88とを有している。他方接触部86は、保持体34に接触する。他方接触部86は、他方板状部54に対向する。他方連結部88は、他方接触部86の一端102と他方板状部54の他端66とを連結する。その結果、本実施形態においては、側面から見た負極24の形は「J」という文字に似ている。   The other support portion 56 has the other contact portion 86 and the other connection portion 88. The contact portion 86 contacts the holder 34. The other contact portion 86 faces the other plate portion 54. The other connection portion 88 connects one end 102 of the other contact portion 86 and the other end 66 of the other plate-like portion 54. As a result, in the present embodiment, the shape of the negative electrode 24 viewed from the side is similar to the letter “J”.

本実施形態の場合、負極24は一体となっている。したがって、他方板状部54と、他方接触部86と、他方連結部88とは、金属製である。より具体的には、これらは銅製である。   In the case of the present embodiment, the negative electrode 24 is integrated. Therefore, the other plate-like portion 54, the other contact portion 86, and the other connection portion 88 are made of metal. More specifically, they are made of copper.

電極間導体26は、電流が流れると発熱する。本実施形態の場合、電極間導体26は、金属製の平板である。その結果、一方支持部52および他方支持部56が配置される平面に平行な方向から電極間導体26を見た場合にその電極間導体26はまっすぐに見える。ここで言う「まっすぐ」とは、一方板状部50が延びる方向と他方板状部54が延びる方向とに沿うことを意味する。電極間導体26に電流が流れる。   The interelectrode conductor 26 generates heat when current flows. In the case of the present embodiment, the interelectrode conductor 26 is a flat plate made of metal. As a result, when the interelectrode conductor 26 is viewed from the direction parallel to the plane in which the one support portion 52 and the other support portion 56 are disposed, the interelectrode conductor 26 looks straight. The term "straight" as used herein means along the direction in which the one plate portion 50 extends and the direction in which the other plate portion 54 extends. A current flows in the interelectrode conductor 26.

本実施形態の場合、接合材28の接合強度は、所定の温度で所定の強さを下回る。本実施形態の場合、その「所定の温度」とは、次に述べられる発熱によって到達する温度である。その発熱とは、過電流が流れている電極間導体26及び熱エネルギを供給する熱エネルギ供給部32の少なくとも一方による発熱である。本実施形態の場合、その「所定の強さ」とは、上述された分離力に耐える強さである。本実施形態の場合、接合材28は上述した「所定の温度」を融点とする合金である。   In the case of the present embodiment, the bonding strength of the bonding material 28 falls below a predetermined strength at a predetermined temperature. In the case of this embodiment, the "predetermined temperature" is a temperature reached by the heat generation described next. The heat generation is heat generation by at least one of the interelectrode conductor 26 through which the overcurrent flows and the heat energy supply unit 32 which supplies heat energy. In the case of this embodiment, the “predetermined strength” is a strength that can withstand the separation force described above. In the case of the present embodiment, the bonding material 28 is an alloy whose melting point is the above-described “predetermined temperature”.

図4は、本実施形態にかかる保護素子10の、電極などが除去された状態での断面図である。図2乃至図4に基づいて、本実施形態にかかる熱エネルギ供給部32の構成が説明される。本実施形態にかかる熱エネルギ供給部32は、一方熱エネルギ生成部120と、他方熱エネルギ生成部122と、電力供給導体124とを有している。一方熱エネルギ生成部120は、一方板状部50と接触する。一方熱エネルギ生成部120は、一方板状部50の他端62を介して接合材28と対向する。一方熱エネルギ生成部120は、一方連結部82と接触する。一方熱エネルギ生成部120は、一方接触部80と接触する。一方熱エネルギ生成部120は、図示されない電気抵抗を有している。これにより、一方熱エネルギ生成部120は、電力を受けて熱エネルギを生成する。   FIG. 4 is a cross-sectional view of the protective element 10 according to the present embodiment in a state where the electrodes and the like are removed. The configuration of the thermal energy supply unit 32 according to the present embodiment will be described based on FIGS. 2 to 4. The thermal energy supply unit 32 according to the present embodiment includes a thermal energy generation unit 120, a thermal energy generation unit 122, and a power supply conductor 124. On the other hand, the thermal energy generation unit 120 contacts the one plate portion 50. On the other hand, the thermal energy generating unit 120 faces the bonding material 28 via the other end 62 of the one plate portion 50. On the other hand, the thermal energy generation unit 120 contacts the one connection unit 82. On the other hand, the thermal energy generating unit 120 contacts the one contact unit 80. On the other hand, the thermal energy generating unit 120 has an electrical resistance (not shown). Accordingly, the thermal energy generating unit 120 receives the power and generates thermal energy.

他方熱エネルギ生成部122は、他方板状部54と接触する。他方熱エネルギ生成部122は、他方板状部54の他端66を介して接合材28と対向する。他方熱エネルギ生成部122は、他方連結部88と接触する。他方熱エネルギ生成部122は、他方接触部86と接触する。他方熱エネルギ生成部122は、図示されない電気抵抗を有している。これにより、他方熱エネルギ生成部122は、電力を受けて熱エネルギを生成する。   On the other hand, the thermal energy generating unit 122 contacts the other plate-like portion 54. On the other hand, the thermal energy generating unit 122 faces the bonding material 28 via the other end 66 of the other plate-like portion 54. On the other hand, the thermal energy generating unit 122 is in contact with the other connecting unit 88. On the other hand, the thermal energy generating unit 122 contacts the other contact unit 86. On the other hand, the thermal energy generating unit 122 has an electrical resistance (not shown). Thus, the other-side heat energy generation unit 122 receives the power and generates heat energy.

電力供給導体124は導体である。電力供給導体124は、一方熱エネルギ生成部120および他方熱エネルギ生成部122に電力を供給する。本実施形態の場合、電力供給導体124は、リード用端子160と、端子側導線162と、連結導線164と、電極側導線166とを有する。リード用端子160の一端が保持体34の外にはみ出す。本実施形態の場合、リード用端子160はスイッチ204に接続される。端子側導線162は、リード用端子160と一方熱エネルギ生成部120とに接続される。端子側導線162は、リード用端子160を介して流れる電流を一方熱エネルギ生成部120に供給する。連結導線164は、一方熱エネルギ生成部120を介して流れる電流を他方熱エネルギ生成部122に供給する。電極側導線166は、他方熱エネルギ生成部122に接続される。電極側導線166は、圧縮コイルバネ30を貫通する。電極側導線166の端部は、図示されない低融点合金によって電極間導体26と接続されている。この低融点合金は、過電流が流れている電極間導体26及び熱エネルギを供給する熱エネルギ供給部32の少なくとも一方の発熱によって溶ける。これにより、電極側導線166と電極間導体26とは電流が流れ得るように接続されている。電極側導線166は、他方熱エネルギ生成部122を介して流れる電流を電極間導体26に供給する。   The power supply conductor 124 is a conductor. The power supply conductor 124 supplies power to the one side thermal energy generating unit 120 and the other side thermal energy generating unit 122. In the case of the present embodiment, the power supply conductor 124 includes the lead terminal 160, the terminal side lead wire 162, the connection lead wire 164, and the electrode side lead wire 166. One end of the lead terminal 160 protrudes out of the holder 34. In the case of the present embodiment, the lead terminal 160 is connected to the switch 204. The terminal side lead wire 162 is connected to the lead terminal 160 and the one side thermal energy generation unit 120. The terminal side lead wire 162 supplies the current flowing through the lead terminal 160 to the one-side thermal energy generation unit 120. The connecting wire 164 supplies the current flowing through the thermal energy generator 120 to the other thermal energy generator 122. The electrode side lead wire 166 is connected to the other thermal energy generating unit 122. The electrode side lead wire 166 penetrates the compression coil spring 30. The end of the electrode-side conductor 166 is connected to the inter-electrode conductor 26 by a low melting point alloy (not shown). The low melting point alloy is melted by heat generation of at least one of the interelectrode conductor 26 through which the overcurrent flows and the thermal energy supply unit 32 which supplies thermal energy. Thereby, the electrode side conducting wire 166 and the interelectrode conductor 26 are connected so that current can flow. The electrode side lead wire 166 supplies the current flowing through the thermal energy generating unit 122 to the inter-electrode conductor 26.

図3と図4とに基づいて、本実施形態にかかる保持体34の構成が説明される。本実施形態にかかる保持体34は、基礎となる底部130と、一方電極固定部132と、他方電極固定部134と、弾性体台136と、変形吸収部138とを有している。一方電極固定部132は、底部130から立つように設けられる。一方電極固定部132には、一方板状部50が固定される。本実施形態の場合、一方電極固定部132によって固定されることにより、一方板状部50は、底部130との間に間隔を開けて配置されるように固定される。一方板状部50は、一方板状部50が一方熱エネルギ生成部120に対向するよう固定される。他方電極固定部134は、底部130から一方電極固定部132に対向して立つように設けられる。他方電極固定部134には、他方板状部54が固定される。本実施形態の場合、他方電極固定部134によって固定されることにより、他方板状部54は、他方板状部54が一方板状部50と同一平面上に配置されるように固定される。他方板状部54は、他方板状部54が底部130との間に間隔を開けて配置されるように固定される。他方板状部54は、他方板状部54が他方熱エネルギ生成部122に対向するように固定される。弾性体台136は、圧縮コイルバネ30を支える。変形吸収部138は、少なくとも保持体34に匹敵する耐熱性を持ち、かつ、保持体34よりも柔らかい合成樹脂である。変形吸収部138は、一方接触部80および他方接触部86に接触すると変形する。これにより、一方接触部80および他方接触部86が変形していても、それらの変形の影響が吸収される。   The configuration of the holder 34 according to the present embodiment will be described based on FIGS. 3 and 4. The holding body 34 according to the present embodiment includes a base 130 serving as a base, a first electrode fixing portion 132, a second electrode fixing portion 134, an elastic base 136, and a deformation absorbing portion 138. On the other hand, the electrode fixing portion 132 is provided to stand from the bottom portion 130. The one plate portion 50 is fixed to the electrode fixing portion 132. In the case of the present embodiment, the one plate portion 50 is fixed so as to be spaced apart from the bottom portion 130 by being fixed by the one electrode fixing portion 132. On the other hand, the plate-like portion 50 is fixed so that the one plate-like portion 50 faces the one side thermal energy generating portion 120. The other electrode fixing portion 134 is provided to stand from the bottom portion 130 so as to face the one electrode fixing portion 132. The other plate-like portion 54 is fixed to the other electrode fixing portion 134. In the case of the present embodiment, by being fixed by the other electrode fixing portion 134, the other plate-like portion 54 is fixed so that the other plate-like portion 54 is disposed on the same plane as the one plate-like portion 50. The other plate-like portion 54 is fixed so that the other plate-like portion 54 is spaced apart from the bottom portion 130. The other plate-like portion 54 is fixed so that the other plate-like portion 54 faces the other thermal energy generating portion 122. The elastic base 136 supports the compression coil spring 30. The deformation absorbing portion 138 is a synthetic resin which has heat resistance at least comparable to that of the holding body 34 and is softer than the holding body 34. The deformation absorbing portion 138 deforms when in contact with the one contact portion 80 and the other contact portion 86. Thereby, even if the one contact portion 80 and the other contact portion 86 are deformed, the influence of the deformation is absorbed.

本実施形態の場合、一方電極固定部132は、一方電極脇固定部140の対と、一方電極支持部142とを有している。一方電極脇固定部140の対は、底部130から立つように設けられる。一方電極脇固定部140の対は、一方板状部50を挟んで固定するように配置される。一方電極支持部142は、一方電極脇固定部140の対の間において底部130から立つように設けられる。一方電極支持部142が、一方平坦面150を有している。一方平坦面150は、一方電極脇固定部140よりも他方電極固定部134側に張出して一方板状部50を支える。   In the case of the present embodiment, the one-electrode fixing portion 132 has a pair of one-electrode side fixing portions 140 and a one-electrode support portion 142. On the other hand, the pair of electrode side fixing parts 140 is provided to stand from the bottom part 130. On the other hand, the pair of electrode side fixing portions 140 is disposed so as to fix the one plate portion 50 therebetween. On the other hand, the electrode support portion 142 is provided to stand from the bottom portion 130 between the pair of the electrode side fixing portions 140. On the other hand, the electrode support portion 142 has a flat surface 150. On the other hand, the flat surface 150 protrudes toward the other electrode fixing portion 134 side than the one electrode side fixing portion 140 and supports the one plate portion 50.

本実施形態の場合、他方電極固定部134は、他方電極脇固定部146の対と、他方電極支持部148とを有している。他方電極脇固定部146の対は、底部130から一方電極固定部132に対向して立つように設けられる。他方電極脇固定部146の対は、他方板状部54を挟んで固定するように配置される。他方電極支持部148は、他方電極脇固定部146の対の間において底部130から一方電極支持部142に対向して立つように設けられる。他方電極支持部148が、他方平坦面156を有している。他方平坦面156は、一方平坦面150と同一平面上に配置される。他方平坦面156は、他方電極脇固定部146よりも一方電極固定部132側に張出して他方板状部54を支える。   In the case of the present embodiment, the other electrode fixing portion 134 has a pair of the other electrode side fixing portion 146 and the other electrode support portion 148. On the other hand, the pair of electrode side fixing portions 146 is provided to stand from the bottom portion 130 to face the one electrode fixing portion 132. On the other hand, the pair of electrode side fixing portions 146 is disposed so as to fix the other plate-like portion 54 therebetween. The other electrode support portion 148 is provided to stand from the bottom portion 130 to face the one electrode support portion 142 between the pair of the other electrode side fixing portions 146. The other electrode support portion 148 has the other flat surface 156. On the other hand, the flat surface 156 is arranged on the same plane as the one flat surface 150. On the other hand, the flat surface 156 projects toward the one electrode fixing portion 132 side with respect to the other electrode side fixing portion 146 to support the other plate-like portion 54.

[動作の説明]
過電流、過充電、及び、過放電のいずれかが生じるまで、圧縮コイルバネ30は圧縮された状態である。その間、正極22と、負極24と、電極間導体26とには電流が流れている。電流が流れることにより、正極22と、負極24と、電極間導体26とは発熱する。発生した熱の一部は正極22および負極24を介して保護素子10の外へ流出する。発生した熱の他の一部は、空間形成体36が形成する空間に放出される。この空間は、一方板状部50から見て一方熱エネルギ生成部120とは反対側および他方板状部54から見て他方熱エネルギ生成部122とは反対側に形成される空間である。熱が流出したり放出されたりするので、そうでない場合に比べて、接合材28の温度上昇は抑えられる。
[Description of operation]
The compression coil spring 30 is in a compressed state until any of the over current, the over charge and the over discharge occurs. In the meantime, current flows in the positive electrode 22, the negative electrode 24, and the inter-electrode conductor 26. When the current flows, the positive electrode 22, the negative electrode 24, and the interelectrode conductor 26 generate heat. Part of the generated heat flows out of the protective element 10 through the positive electrode 22 and the negative electrode 24. Another part of the generated heat is released to the space formed by the space formation body 36. This space is a space formed on the side opposite to the one side of the thermal energy generating portion 120 as viewed from the one plate-like portion 50 and on the opposite side as the other side of the thermal energy producing portion 122 as viewed from the other side. Since heat flows out and is released, the temperature rise of the bonding material 28 is suppressed as compared with the case where it is not so.

二次電池220に過電流が流れると保護素子10の電極間導体26にも過電流が流れる。電流が流れると電極間導体26が急速に発熱する。電極間導体26が急速に発熱すると接合材28はその熱を受ける。過電流に起因する多くの熱があると、その熱を受けた接合材28は所定の温度に到達する。所定の温度に到達したその接合材28は溶ける。電極側導線166の端部と電極間導体26とを接続する低融点合金も溶ける。接合材28が溶けると圧縮コイルバネ30は電極間導体26を正極22及び負極24から離す。これにより、負荷200と二次電池220との間が遮断される。   When the overcurrent flows in the secondary battery 220, the overcurrent also flows in the interelectrode conductor 26 of the protection element 10. When a current flows, the interelectrode conductor 26 generates heat rapidly. When the interelectrode conductor 26 generates heat rapidly, the bonding material 28 receives the heat. When there is much heat due to the over current, the bonding material 28 that has received the heat reaches a predetermined temperature. The bonding material 28 that has reached the predetermined temperature melts. The low melting point alloy connecting the end of the electrode-side conductor 166 and the inter-electrode conductor 26 also melts. When the bonding material 28 melts, the compression coil spring 30 separates the interelectrode conductor 26 from the positive electrode 22 and the negative electrode 24. Thus, the load 200 and the secondary battery 220 are disconnected.

二次電池220が過放電状態になると、制御素子206はスイッチ204へスイッチオン信号を発信する。スイッチ204はスイッチオン信号を受信すると「オン」状態となる。スイッチ204が「オン」状態になると保護素子10の熱エネルギ供給部32に電流が流れる。電流が流れると熱エネルギ供給部32の一方熱エネルギ生成部120と他方熱エネルギ生成部122とは熱エネルギを生成する。熱エネルギを生成が生成されると接合材28はその熱を受ける。熱を受けると接合材28は所定の温度に到達する。所定の温度に到達したその接合材28は溶ける。その熱が伝わった低融点合金も溶ける。接合材28が溶けると圧縮コイルバネ30は電極間導体26を正極22及び負極24から離す。これにより、負荷200と二次電池220との間が遮断される。   When the secondary battery 220 is in the overdischarged state, the control element 206 sends a switch on signal to the switch 204. When the switch 204 receives the switch on signal, it turns to the "on" state. When the switch 204 is in the “on” state, a current flows in the thermal energy supply unit 32 of the protection element 10. When the current flows, the one thermal energy generating unit 120 and the other thermal energy generating unit 122 of the thermal energy supply unit 32 generate thermal energy. Bonding material 28 receives its heat when it produces thermal energy. When heat is received, the bonding material 28 reaches a predetermined temperature. The bonding material 28 that has reached the predetermined temperature melts. The low melting point alloy which the heat was transmitted also melts. When the bonding material 28 melts, the compression coil spring 30 separates the interelectrode conductor 26 from the positive electrode 22 and the negative electrode 24. Thus, the load 200 and the secondary battery 220 are disconnected.

二次電池220が過充電状態になると、制御素子206はスイッチ204へスイッチオン信号を発信する。スイッチ204はスイッチオン信号を受信すると「オン」状態となる。スイッチ204が「オン」状態になると保護素子10の熱エネルギ供給部32に電流が流れる。電流が流れると熱エネルギ供給部32の一方熱エネルギ生成部120と他方熱エネルギ生成部122とは熱エネルギを生成する。熱エネルギを生成が生成されると接合材28はその熱を受ける。熱を受けると接合材28は所定の温度に到達する。所定の温度に到達したその接合材28は溶ける。その熱が伝わった低融点合金も溶ける。接合材28が溶けると圧縮コイルバネ30は電極間導体26を正極22及び負極24から離す。これにより、充電電源202と二次電池220との間が遮断される。   When the secondary battery 220 is overcharged, the control element 206 sends a switch on signal to the switch 204. When the switch 204 receives the switch on signal, it turns to the "on" state. When the switch 204 is in the “on” state, a current flows in the thermal energy supply unit 32 of the protection element 10. When the current flows, the one thermal energy generating unit 120 and the other thermal energy generating unit 122 of the thermal energy supply unit 32 generate thermal energy. Bonding material 28 receives its heat when it produces thermal energy. When heat is received, the bonding material 28 reaches a predetermined temperature. The bonding material 28 that has reached the predetermined temperature melts. The low melting point alloy which the heat was transmitted also melts. When the bonding material 28 melts, the compression coil spring 30 separates the interelectrode conductor 26 from the positive electrode 22 and the negative electrode 24. Thus, the charge power source 202 and the secondary battery 220 are disconnected.

[効果の説明]
以上のようにして、本実施形態にかかる保護素子10において、正極22から電極間導体26を経て負極24へわたる電流の経路のうち、次に述べられる部分の距離が抑えられている。その部分は、少なくとも一方板状部50により形成される部分、および、他方板状部54により形成される部分である。距離が抑えられると電気抵抗は小さくなる。一方板状部50は板状である。他方板状部54も板状である。板状の電極は、直径がその板状の電極の厚さと等しい線状の電極に比べて、電気抵抗が小さい。電気抵抗が小さくなると流れる電流の大きさの割に発熱量は少なくなる。しかも、一方板状部50の一端60と他方板状部54の一端64とは保持体34の外にはみ出している。それらがはみ出しているので、熱が保持体34の外へ次第に流出する。正極22と電極間導体26と負極24とが発生させる熱が少なく、かつ、その熱が保持体34の外に流出すると、そうでない場合に比べ、その熱に起因して接合材28の温度が上昇する可能性は低くなる。その結果、流し得る電流の大きさの割に誤動作が生じ難い保護素子10を提供できる。
[Description of effect]
As described above, in the protection element 10 according to the present embodiment, the distance of the portion to be described next in the current path from the positive electrode 22 to the negative electrode 24 via the interelectrode conductor 26 is suppressed. The portion is a portion formed by at least one plate-like portion 50 and a portion formed by the other plate-like portion 54. When the distance is reduced, the electrical resistance decreases. On the other hand, the plate-like portion 50 is plate-like. The plate-like portion 54 is also plate-like. The plate-like electrode has a smaller electrical resistance than a linear electrode whose diameter is equal to the thickness of the plate-like electrode. As the electric resistance decreases, the amount of heat generation decreases in proportion to the magnitude of the flowing current. Moreover, the one end 60 of the one plate portion 50 and the one end 64 of the other plate portion 54 protrude out of the holding body 34. As they are sticking out, heat will gradually drain out of the carrier 34. If the heat generated by the positive electrode 22, the inter-electrode conductor 26 and the negative electrode 24 is small, and the heat flows out of the holder 34, the temperature of the bonding material 28 due to the heat is higher than otherwise. It is less likely to rise. As a result, it is possible to provide the protection element 10 in which a malfunction does not easily occur in spite of the magnitude of the current that can flow.

しかも、本実施形態にかかる保護素子10において、正極22および負極24の位置は安定している。それらの位置が安定しているので、電流の経路が安定する。電流の経路が安定すると、流れる電流の大きさの割に誤動作が生じ難くなる。   Moreover, in the protective element 10 according to the present embodiment, the positions of the positive electrode 22 and the negative electrode 24 are stable. As their position is stable, the current path is stable. When the current path is stabilized, it becomes difficult to cause a malfunction due to the magnitude of the flowing current.

しかも、本実施形態にかかる保護素子10において、一方熱エネルギ生成部120および他方熱エネルギ生成部122が生成した熱エネルギが接合材28によく伝わる。それらの熱エネルギが良く伝わると、そうでない場合に比べ、熱エネルギ供給部32が熱エネルギを供給することに起因する接合材28の温度上昇は生じ易くなる。その結果、流れる電流の大きさの割に誤動作が生じ難くなる。   Moreover, in the protection element 10 according to the present embodiment, the thermal energy generated by the one thermal energy generation unit 120 and the other thermal energy generation unit 122 is well transmitted to the bonding material 28. When the thermal energy is well transmitted, the temperature rise of the bonding material 28 due to the thermal energy supply unit 32 supplying thermal energy is more likely to occur than in the case where the thermal energy is not transmitted well. As a result, malfunction is less likely to occur in proportion to the magnitude of the flowing current.

〈変形例の説明〉
上述した保護素子10は、本発明の技術的思想を具体化するために例示したものである。上述した保護素子10は、本発明の技術的思想の範囲内において種々の変更を加え得るものである。
<Description of Modification>
The above-described protective element 10 is illustrated to embody the technical idea of the present invention. The protective element 10 described above can be variously modified within the scope of the technical idea of the present invention.

例えば、正極22および負極24が突出する方向は反対側に限定されない。例えば、正極22および負極24の一方は他方に対して直交する方向に突出してもよい。   For example, the direction in which the positive electrode 22 and the negative electrode 24 protrude is not limited to the opposite side. For example, one of the positive electrode 22 and the negative electrode 24 may protrude in the direction orthogonal to the other.

また、電極間導体26の形態は、次に述べられる要件が満たされる上述されたものと別の形態であってもよい。その要件は、一方支持部52および他方支持部56が配置される平面に平行な方向から電極間導体26を見た場合にその電極間導体26がまっすぐに見えるという要件である。例えば電極間導体26はまっすぐな線状であってもよい。電極間導体26は、電極間導体26は、正極22の他端62の上と負極24の他端66の上とに載せられていてもよいし、一方支持部52および他方支持部56と同一平面上に配置されていてもよい。   Also, the form of the interelectrode conductor 26 may be another form than the one described above in which the requirements to be described next are satisfied. The requirement is that the inter-electrode conductor 26 looks straight when the inter-electrode conductor 26 is viewed from the direction parallel to the plane in which the one support portion 52 and the other support portion 56 are arranged. For example, the interelectrode conductor 26 may be straight and linear. The inter-electrode conductor 26 may be placed on the other end 62 of the positive electrode 22 and the other end 66 of the negative electrode 24, or the same as the one support portion 52 and the other support portion 56. It may be arranged on a plane.

また、保護素子10は、圧縮コイルバネ30に代え、電極間導体26に分離力を加え得る任意の弾性体を備えてもよい。   Further, the protective element 10 may be replaced by the compression coil spring 30 and may be provided with any elastic body capable of applying a separation force to the inter-electrode conductor 26.

また、正極22および負極24の形態は上述したものに限定されない。正極22は一方支持部52を有していなくてもよい。負極24は他方支持部56を有していなくてもよい。一方支持部および他方支持部の構成は上述したものに限定されない。一方支持部および他方支持部の少なくとも一方の形態が板状であってもよい。図5は、上述された実施形態の変形例にかかる保護素子310の断面図である。本変形例にかかる保護素子310は、上述された正極22と負極24と保持体34とに代えて、正極322と負極324と保持体334とを備えている。正極322は、一方板状部50と、一方支持部352とを有している。一方支持部352は、平板状である。一方支持部352は、保持体334に接することで一方板状部50の他端62を支える。その結果、正極322の側面から見た形は「L」という文字に似ることとなる。負極324は、他方板状部54と、他方支持部356とを有している。他方支持部356は、平板状である。他方支持部356は、保持体334に接することで他方板状部54の他端66を支える。その結果、負極324の側面から見た形は「L」という文字に似ることとなる。保持体334は、上述された保持体34に比べて開口から底部130までが浅い点を除けば、上述された保持体34と同様である。   Moreover, the form of the positive electrode 22 and the negative electrode 24 is not limited to what was mentioned above. The positive electrode 22 may not have the one support portion 52. The negative electrode 24 may not have the other support portion 56. The configurations of the one support portion and the other support portion are not limited to those described above. The form of at least one of the one support portion and the other support portion may be plate-like. FIG. 5 is a cross-sectional view of a protection element 310 according to a modification of the embodiment described above. The protection element 310 according to the present modification includes a positive electrode 322, a negative electrode 324, and a holding member 334, instead of the positive electrode 22, the negative electrode 24, and the holding member 34 described above. The positive electrode 322 includes a one plate portion 50 and a one support portion 352. On the other hand, the support portion 352 is flat. On the other hand, the support portion 352 supports the other end 62 of the one plate portion 50 by being in contact with the holding body 334. As a result, the shape viewed from the side of the positive electrode 322 resembles the letter “L”. The negative electrode 324 has the other plate-like portion 54 and the other support portion 356. On the other hand, the support portion 356 is flat. The other support portion 356 supports the other end 66 of the other plate-like portion 54 by being in contact with the holding body 334. As a result, the shape viewed from the side of the negative electrode 324 resembles the letter “L”. The holder 334 is similar to the holder 34 described above except that the opening to the bottom 130 is shallower than the holder 34 described above.

10,310…保護素子
22,322…正極
24,324…負極
26…電極間導体
28…接合材
30…圧縮コイルバネ
32…熱エネルギ供給部
34,334…保持体
36…空間形成体
38…リード用絶縁体
50…一方板状部
52,352…一方支持部
54…他方板状部
56,356…他方支持部
60,64,100,102…一端
62,66…他端
80…一方接触部
82…一方連結部
86…他方接触部
88…他方連結部
120…一方熱エネルギ生成部
122…他方熱エネルギ生成部
124…電力供給導体
130…底部
132…一方電極固定部
134…他方電極固定部
136…弾性体台
138…変形吸収部
140…一方電極脇固定部
142…一方電極支持部
146…他方電極脇固定部
148…他方電極支持部
150…一方平坦面
156…他方平坦面
160…リード用端子
162…端子側導線
164…連結導線
166…電極側導線
200…負荷
202…充電電源
204…スイッチ
206…制御素子
220…二次電池
DESCRIPTION OF SYMBOLS 10, 310 ... Protection element 22, 322 ... Positive electrode 24, 324 ... Negative electrode 26 ... Conductor between electrodes 28 ... Bonding material 30 ... Compression coil spring 32 ... Thermal energy supply part 34, 334 ... Holder 36 ... Space formation body 38 ... For lead Insulator 50: One plate-like portion 52, 352: One support portion 54: Other plate-like portion 56, 356: Other support portion 60, 64, 100, 102: One end 62, 66: Other end 80: One contact portion 82: On the other hand, the connection part 86 ... the other contact part 88 ... the other connection part 120 ... the one side thermal energy generation part 122 ... the other side the heat energy generation part 124 ... the power supply conductor 130 ... the bottom part 132 ... the one electrode fixing part 134 Body base 138 ... deformation absorption part 140 ... one electrode side fixing part 142 ... one electrode supporting part 146 ... other electrode side fixing part 148 ... other electrode supporting part 150 ... one flat surface 156 ... other surface Surface 160 ... lead terminal 162 ... terminal-side conductor 164 ... connecting conductors 166 ... electrode side conductor 200 ... load 202 ... charging power 204 ... switch 206 ... control device 220 ... secondary battery

Claims (7)

電極の対と、
前記電極の対の間に配置される導体である電極間導体と、
前記電極間導体を前記電極の対それぞれへ接合する接合材と、
前記電極間導体に分離力を加える弾性体と、
前記接合材へ熱エネルギを供給する熱エネルギ供給部と、
前記電極の対、前記電極間導体、前記接合材、前記弾性体、および、前記熱エネルギ供給部を保持する保持体とを備え、
前記分離力は前記電極間導体が前記電極の対から離れる方向の力であり、
前記接合材の接合強度が所定の温度で所定の強さを下回り、
前記所定の温度が前記熱エネルギ供給部から前記熱エネルギが供給されることによって到達する温度であり、
前記所定の強さは前記分離力に耐える強さである保護素子であって、
前記電極の対の一方が、前記保持体の外に一端がはみ出し、前記接合材によって前記電極間導体が他端に接合され、かつ、板状の、一方板状部を有しており、
前記電極の対の他方が、前記一方板状部とは異なる方向に向かって前記保持体の外に一端がはみ出し、前記接合材によって前記電極間導体が他端に接合され、前記一方板状部と同一平面上に配置され、かつ、板状の、他方板状部を有していることを特徴とする保護素子。
With a pair of electrodes,
An inter-electrode conductor which is a conductor disposed between the pair of electrodes;
A bonding material for bonding the inter-electrode conductor to each of the pair of electrodes;
An elastic body that applies a separation force to the interelectrode conductor;
A thermal energy supply unit for supplying thermal energy to the bonding material;
The pair of electrodes, the inter-electrode conductor, the bonding material, the elastic body, and a holder for holding the thermal energy supply unit,
The separation force is a force in a direction in which the interelectrode conductor is separated from the pair of electrodes,
The bonding strength of the bonding material falls below a predetermined strength at a predetermined temperature,
The predetermined temperature is a temperature reached by the supply of the thermal energy from the thermal energy supply unit,
The protection element according to claim 1, wherein the predetermined strength is strength to withstand the separation force.
One end of one of the pair of electrodes protrudes out of the holding body, the inter-electrode conductor is joined to the other end by the joining material, and it has a plate-like one-plate portion.
One end of the other of the pair of electrodes protrudes outside the holding body in a direction different from the one plate-like portion, and the interelectrode conductor is joined to the other end by the bonding material, and the one plate-like portion And a plate-like other plate-like portion disposed on the same plane.
前記電極の対の一方が、前記一方板状部に加え、前記保持体に接することで前記一方板状部の前記他端を支えるよう前記一方板状部の前記他端に設けられる一方支持部を有しており、
前記電極の対の他方が、前記他方板状部に加え、前記保持体に接することで前記他方板状部の前記他端を支えるよう前記他方板状部の前記他端に設けられる他方支持部を有していることを特徴とする請求項1に記載の保護素子。
One support portion provided on the other end of the one plate-like portion so as to support the other end of the one plate-like portion by being in contact with the holding body in addition to the one plate-like portion And have
The other support portion provided on the other end of the other plate-like portion so as to support the other end of the other plate-like portion by being in contact with the holding body in addition to the other plate-like portion of the other pair of electrodes The protection element according to claim 1, comprising:
前記一方支持部が、
前記保持体に接触し前記一方板状部に対向する金属製の一方接触部と、
前記一方接触部の一端と前記一方板状部の前記他端とを連結する金属製の一方連結部とを有しており、
前記他方支持部が、
前記保持体に接触し前記他方板状部に対向する金属製の他方接触部と、
前記他方接触部の一端と前記他方板状部の前記他端とを連結する金属製の他方連結部とを有していることを特徴とする請求項2に記載の保護素子。
The one support portion is
A metallic one-contact portion that contacts the holding body and faces the one plate-like portion;
It has a metal one connecting part which connects one end of the one contact part and the other end of the one plate-like part,
The other support portion is
Another metal contact portion that contacts the holder and faces the other plate-like portion;
The protection element according to claim 2, further comprising: a metal other connecting portion connecting the one end of the other contact portion and the other end of the other plate-like portion.
前記熱エネルギ供給部が、
前記一方板状部に接触し、前記一方板状部の前記他端を介して前記接合材と対向し、前記一方連結部と接触し、前記一方接触部と接触し、かつ、電力を受けて熱エネルギを生成する一方熱エネルギ生成部と、
前記他方板状部に接触し、前記他方板状部の前記他端を介して前記接合材と対向し、前記他方連結部と接触し、前記他方接触部と接触し、かつ、電力を受けて熱エネルギを生成する他方熱エネルギ生成部と、
前記一方熱エネルギ生成部および前記他方熱エネルギ生成部に前記電力を供給する導体である電力供給導体とを有していることを特徴とする請求項3に記載の保護素子。
The heat energy supply unit
It contacts the one plate-like portion, faces the bonding material through the other end of the one plate-like portion, contacts the one connection portion, contacts the one contact portion, and receives power. Generating thermal energy while generating thermal energy;
It contacts the other plate-like portion, faces the bonding material through the other end of the other plate-like portion, contacts the other connecting portion, contacts the other contacting portion, and receives power. A thermal energy generating unit that generates thermal energy;
4. The protection device according to claim 3, further comprising: a power supply conductor which is a conductor for supplying the power to the one heat energy generating portion and the other heat energy generating portion.
前記一方板状部から見て前記一方熱エネルギ生成部とは反対側および前記他方板状部から見て前記他方熱エネルギ生成部とは反対側に外部と連通する空間を形成する空間形成体をさらに備えることを特徴とする請求項4に記載の保護素子。   A space forming member forming a space communicating with the outside on the opposite side to the one thermal energy generating part as viewed from the one plate-like part and on the opposite side to the other thermal energy producing part as viewed from the other plate-like part The protection device according to claim 4, further comprising: 前記保持体が、
基礎となる底部と、
前記底部から立つように設けられ、前記底部との間に間隔を開け前記熱エネルギ供給部に対向するよう前記一方板状部が固定される一方電極固定部と、
前記底部から前記一方電極固定部に対向して立つように設けられ、前記他方板状部が前記一方板状部と同一平面上に配置され、前記他方板状部が前記底部との間に間隔を開けて配置され、かつ、前記他方板状部が前記熱エネルギ供給部に対向するよう前記他方板状部が固定される他方電極固定部とを有していることを特徴とする請求項1に記載の保護素子。
The holder is
The bottom to be the foundation,
A one-electrode fixing portion provided so as to stand from the bottom portion and having a space between the bottom portion and the one plate portion fixed to face the heat energy supply portion;
The other plate-like portion is disposed on the same plane as the one plate-like portion, and the other plate-like portion is spaced apart from the bottom portion. And a second electrode fixing portion fixed to the other plate-like portion such that the other plate-like portion faces the heat energy supply portion. The protection element described in.
前記一方電極固定部が、
前記底部から立つように設けられ、前記一方板状部を挟んで固定するように配置される一方電極脇固定部の対と、
前記一方電極脇固定部の対の間において前記底部から立つように設けられる一方電極支持部とを有しており、
前記一方電極支持部が、前記一方電極脇固定部よりも前記他方電極固定部側に張出して前記一方板状部を支える一方平坦面を有しており、
前記他方電極固定部が、
前記底部から前記一方電極脇固定部に対向して立つように設けられ、前記他方板状部を挟んで固定するように配置される他方電極脇固定部の対と、
前記他方電極脇固定部の対の間において前記底部から前記一方電極支持部に対向して立つように設けられる他方電極支持部とを有しており、
前記他方電極支持部が、前記一方平坦面と同一平面上に配置され、前記他方電極脇固定部よりも前記一方電極固定部側に張出して前記他方板状部を支える他方平坦面を有していることを特徴とする請求項6に記載の保護素子。
The one electrode fixing portion is
A pair of electrode side fixing portions provided so as to stand from the bottom and disposed so as to sandwich and fix the one plate portion;
A pair of electrode support portions provided so as to stand from the bottom portion between the pair of the one electrode side fixing portions;
The one electrode support portion has a one flat surface extending toward the other electrode fixing portion side than the one electrode side fixing portion to support the one plate-like portion.
The other electrode fixing portion is
A pair of other electrode side fixing portions provided so as to stand from the bottom portion facing the one electrode side fixing portion and sandwiching and fixing the other plate-like portion;
And a second electrode supporting portion provided to stand opposite to the first electrode supporting portion from the bottom portion between the pair of the second electrode side fixing portions,
The other electrode support portion is disposed on the same plane as the one flat surface, and has the other flat surface extending toward the one electrode fixing portion side than the other electrode side fixing portion to support the other plate-like portion. A protection device according to claim 6, characterized in that:
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JP2009212006A (en) * 2008-03-05 2009-09-17 Uchihashi Estec Co Ltd Circuit breaking method for excessive current and protection element

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KR101207581B1 (en) * 2011-10-31 2012-12-04 (주)엠에스테크비젼 Repeatable fuse for preventing over-current
KR101220283B1 (en) * 2011-12-08 2013-01-21 (주)엠에스테크비젼 Repeatable fuse for high current
JP5844669B2 (en) * 2012-03-26 2016-01-20 デクセリアルズ株式会社 Protective element
TW201528305A (en) * 2014-01-15 2015-07-16 Dexerials Corp Protection element

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JPH03155018A (en) * 1989-11-10 1991-07-03 Kokonoe Denki Kk Fuse breaker
JP2009212006A (en) * 2008-03-05 2009-09-17 Uchihashi Estec Co Ltd Circuit breaking method for excessive current and protection element

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