JP2009193783A - Battery pack - Google Patents

Battery pack Download PDF

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JP2009193783A
JP2009193783A JP2008032055A JP2008032055A JP2009193783A JP 2009193783 A JP2009193783 A JP 2009193783A JP 2008032055 A JP2008032055 A JP 2008032055A JP 2008032055 A JP2008032055 A JP 2008032055A JP 2009193783 A JP2009193783 A JP 2009193783A
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battery
battery pack
base member
covering
end surface
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JP5243810B2 (en
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Shinji Ota
晋志 大田
Takeshi Ishimaru
毅 石丸
Masunori Hamaguchi
益徳 濱口
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Panasonic Corp
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Panasonic Corp
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    • 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

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  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery pack allowing a safety member to be surely attached to a small-area end surface of a battery. <P>SOLUTION: The safety member 3 is provided with: a base member 9 covering the end surface of a battery 2 with electrodes 7 and 8 exposed, and having lock claws 15 and 16 projecting in the front-rear direction; a circuit composing member 10 for composing a circuit electrically connected to the electrodes 7 and 8; a thermostat 11 controlling the circuit; and a cover member 12 lockable to the lock pawls 15 and 16 in a state of covering the circuit composing member 10 and the thermostat 11. The cover member 12 has an extension part 28 extending to front and rear side surfaces of the battery 2 in the state of covering the circuit composing member 10 and the thermostat 11, and is further provided with a label 5 stuck to a side surface of the battery 2 and the extension part 28 to be wound around the side surface of the battery 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、過充電や過放電等の誘因が検知されたときに、熱暴走や内部短絡の発生を阻止すべく回路を制御する***材を搭載した電池パックに関するものである。   The present invention relates to a battery pack equipped with a safety member that controls a circuit to prevent the occurrence of thermal runaway or internal short circuit when an incentive such as overcharge or overdischarge is detected.

一般に、電池と、前記電池の熱暴走や内部短絡等の発生を阻止するための***材とを備えた電池パックが知られている。前記***材は、電池の極に電気的に接続される回路基板と、過充電や過放電等の誘因が検知されたときに前記回路基板の回路を制御する制御部材とを備えている。   In general, a battery pack including a battery and a safety member for preventing the battery from causing a thermal runaway, an internal short circuit, or the like is known. The safety member includes a circuit board that is electrically connected to a battery pole, and a control member that controls the circuit of the circuit board when an incentive such as overcharge or overdischarge is detected.

例えば、特許文献１には、二次電池等の取付対象物の取付面に取り付けられた保護装置が開示されている。具体的に、取付対象物の取付面には、鉤状部が形成された複数の突起片が立設されており、これら突起片が保護装置の受入部に圧入されることによって、受入部の段差部と各突起片の鉤状部とが係止されて、取付対象物に保護装置が取り付けられる。
特開２００６−４７８３号公報 For example, Patent Document 1 discloses a protection device attached to an attachment surface of an attachment object such as a secondary battery. Specifically, a plurality of projecting pieces formed with hook-shaped portions are erected on the mounting surface of the mounting object, and these projecting pieces are press-fitted into the receiving portion of the protective device. The step portion and the hook-like portion of each projection piece are locked, and the protection device is attached to the attachment object.
JP 2006-4783 A

近年では、電池パックの薄型化が進められているため、前記***材を取り付ける位置は、電池の厚み方向と直交する方向に向く小面積の端面に限られるという事情がある。   In recent years, since the battery pack has been made thinner, the position where the safety member is attached is limited to the end face of a small area facing the direction orthogonal to the thickness direction of the battery.

ここで、前記特許文献１の保護装置の取付面が小面積となると、保護装置に含まれる部材（回路基板や制御部材）を前記取付面内の限られたスペースにレイアウトすることが必要となるため、この取付面内に前記突起片を立設するためのスペースを確保するのは困難である。   Here, when the mounting surface of the protection device of Patent Document 1 has a small area, it is necessary to lay out members (circuit boards and control members) included in the protection device in a limited space in the mounting surface. For this reason, it is difficult to secure a space for erecting the protruding piece in the mounting surface.

また、前記特許文献１では、取付面に各突起片を立設することとしているため、これら突起片に係止するための受入部の段差部は、各突起片に対し前記取付面と直交する方向に並ぶこととなり、電池パック全体が厚み方向と直交する方向に必要以上に大きくなってしまうおそれもある。   Moreover, in the said patent document 1, since it is supposed that each projection piece is standingly arranged in the attachment surface, the level | step-difference part of the receiving part for latching to these projection pieces is orthogonal to the said attachment surface with respect to each projection piece. As a result, the entire battery pack may be unnecessarily large in the direction perpendicular to the thickness direction.

本発明は、上記課題に鑑みてなされたものであり、電池の小面積の端面に対して***材を確実に取り付けることができる電池パックを提供することを目的とする。   This invention is made | formed in view of the said subject, and it aims at providing the battery pack which can attach a safety member reliably with respect to the end surface of the small area of a battery.

上記課題を解決するために、本発明は、厚み方向と直交する方向に向く端面に電極が形成された電池と、前記電池の端面に搭載された***材とを有する電池パックであって、前記***材は、前記電極を露出させた状態で前記電池の端面を覆うとともに前記電池の厚み方向に突出する係止爪を有するベース部材と、前記電極と電気的に接続された回路を構成するための回路構成部材と、所定の誘因が検知されたときに前記回路を制御する制御部材と、前記回路構成部材及び前記制御部材を覆った状態で前記ベース部材の係止爪と係止可能な被覆部材と、前記被覆部材に設けられ、前記回路構成部材及び制御部材を覆った状態で前記電池の厚み方向の側面まで延びる延出部とを備え、前記電池の側面に巻きつけられるように前記電池の側面及び前記被覆部材の延出部に貼着される貼着部材をさらに備えていることを特徴とする電池パックを提供する。   In order to solve the above problems, the present invention is a battery pack comprising a battery having an electrode formed on an end surface facing a direction orthogonal to the thickness direction, and a safety member mounted on the end surface of the battery, The safety member constitutes a base member having an engaging claw that covers the end face of the battery with the electrode exposed and protrudes in the thickness direction of the battery, and a circuit electrically connected to the electrode. A circuit member, a control member that controls the circuit when a predetermined incentive is detected, and a cover that can be locked with a locking claw of the base member while covering the circuit component and the control member The battery includes a member and an extending portion that is provided on the covering member and extends to a side surface in the thickness direction of the battery in a state of covering the circuit component member and the control member, and is wound around the side surface of the battery. Aspects and To provide a battery pack, characterized in that it further comprises a sticking member which is attached to the extending portion of the covering member.

本発明によれば、係止爪によりベース部材と被覆部材とが互いに係止されるとともに、貼着部材が電池の側面に巻きつけられることにより、延出部と電池とが固定されることになる。つまり、貼着部材によって電池に固定されたベース部材に対して被覆部材が係止されているため、これらベース部材及び被覆部材を電池に固定することが可能となる。   According to the present invention, the base member and the covering member are locked to each other by the locking claws, and the extending portion and the battery are fixed by winding the sticking member around the side surface of the battery. Become. That is, since the covering member is locked to the base member fixed to the battery by the sticking member, the base member and the covering member can be fixed to the battery.

そして、本発明においては、電池の厚み方向と直交する方向に向く端面に設けられるベース部材から前記厚み方向に係止爪を突出させているため、前記端面上のスペースを回路構成部材及び制御部材のために有効に活用しながら、当該端面の外側に係止爪を設けることができる。そして、この係止爪及び貼着部材を利用して***材と電池とを固定することができるので、電池の小面積の端面に対しても***材を確実に取り付けることができる。   And in this invention, since the latching claw is protruded in the said thickness direction from the base member provided in the end surface which faces in the direction orthogonal to the thickness direction of a battery, the space on the said end surface is made into a circuit component member and a control member. For this reason, a locking claw can be provided on the outer side of the end face while being effectively utilized. And since a safety member and a battery can be fixed using this latching claw and a sticking member, a safety member can be reliably attached also to the end surface of the small area of a battery.

また、本発明では、係止爪を厚み方向に突出させているため、この係止爪と係止するための構成が電池の厚み方向と直交する方向に並ぶのを抑制することができるため、同方向に電池パック全体が大きくなるのを抑制することができる。   Further, in the present invention, since the locking claw protrudes in the thickness direction, it is possible to suppress the configuration for locking with the locking claw from being arranged in a direction orthogonal to the thickness direction of the battery. It can suppress that the whole battery pack becomes large in the same direction.

前記電池パックにおいて、前記延出部には、前記ベース部材の係止爪と係止可能な係止部が形成されていることが好ましい。   In the battery pack, it is preferable that a locking portion that can be locked with a locking claw of the base member is formed in the extending portion.

この構成によれば、係止爪に係止した延出部が前記貼着部材によって電池の側面に固定されることにより、係止を解除する方向の延出部の移動が拘束されて、延出部と係止爪との係止状態をより確実に保持することが可能となる。   According to this configuration, the extension portion locked to the locking claw is fixed to the side surface of the battery by the sticking member, so that the movement of the extension portion in the direction to release the locking is restricted, and the extension portion is extended. It is possible to hold the locking state between the protruding portion and the locking claw more reliably.

具体的に、前記延出部に前記係止爪が挿入される孔を前記係止部として形成した場合には、前記係止爪を孔に挿入した状態で、前記延出部の移動を貼着部材によって拘束することができるので、延出部と係止爪との係止状態を確実に保持することができる。   Specifically, when the hole into which the locking claw is inserted is formed as the locking part in the extending part, the movement of the extending part is affixed with the locking claw inserted into the hole. Since it can be restrained by the wearing member, the locked state between the extending portion and the locking claw can be reliably held.

前記電池パックにおいて、前記回路構成部材は、基板と、前記基板と前記電池の電極とを電気的に接続するための導電部材とを備え、前記ベース部材は、前記電池の端面から所定の間隔を空けて前記基板を保持するように構成されているとともに、前記導電部材は、前記基板と電池との間に設けられていることが好ましい。   In the battery pack, the circuit component member includes a substrate and a conductive member for electrically connecting the substrate and the electrode of the battery, and the base member has a predetermined distance from an end surface of the battery. Preferably, the conductive member is provided between the substrate and the battery while being configured to hold the substrate in an empty space.

この構成によれば、係止爪を設けるためのベース部材を利用して、導電部材の配置のためのスペースを確保しながら、基板を保持することができる。   According to this configuration, it is possible to hold the substrate while securing a space for the arrangement of the conductive member by using the base member for providing the locking claw.

前記電池パックにおいて、前記導電部材は、前記電池の電極に固定された固定部材を備え、前記固定部材を介して前記ベース部材と電池とが互いに固定されていることが好ましい。   In the battery pack, it is preferable that the conductive member includes a fixing member fixed to an electrode of the battery, and the base member and the battery are fixed to each other via the fixing member.

この構成によれば、前記貼着部材だけでなく、固定部材を介してベース部材を電池に固定することができるので、電池と***材との取り付け強度をより強くすることが可能となる。   According to this configuration, since the base member can be fixed to the battery via the fixing member as well as the sticking member, the attachment strength between the battery and the safety member can be further increased.

具体的に、前記固定部材を、前記電池の端面との間で前記ベース部材の一部を挟んだ状態で前記電極に固定することができる。   Specifically, the fixing member can be fixed to the electrode in a state where a part of the base member is sandwiched between the end surface of the battery.

このようにすれば、固定部材と電池の端面との間にベース部材を挟持させることができる。   In this way, the base member can be sandwiched between the fixing member and the end face of the battery.

また、前記ベース部材に前記固定部材を通すための貫通孔を形成し、前記固定部材を前記貫通孔に圧入することにより、前記ベース部材を電池に固定する構成とすることもできる。   The base member may be fixed to the battery by forming a through hole for passing the fixing member through the base member and press-fitting the fixing member into the through hole.

このようにすれば、貫通孔に対する固定部材の摺動抵抗によってベース部材を電池に固定することができる。   In this way, the base member can be fixed to the battery by the sliding resistance of the fixing member with respect to the through hole.

前記電池パックにおいて、前記ベース部材と前記被覆部材とを両者の係止状態を解除することなく分解したときに前記ベース部材、前記被覆部材の少なくとも一方が破壊するように、前記ベース部材及び被覆部材の強度が設定されていることが好ましい。   In the battery pack, when the base member and the covering member are disassembled without releasing their locking state, at least one of the base member and the covering member is destroyed. Is preferably set.

この構成によれば、ベース部材と被覆部材とを無理に分解したときに、これら部材の少なくとも一方が破壊されるため、***材が他の電池に再利用されるのを抑制することができる。   According to this configuration, when the base member and the covering member are forcibly disassembled, at least one of these members is destroyed, so that the safety member can be prevented from being reused by another battery.

前記電池パックにおいて、前記ベース部材を前記電池の端面に仮止めするための仮止め部材をさらに備えていることが好ましい。   The battery pack preferably further includes a temporary fixing member for temporarily fixing the base member to the end surface of the battery.

この構成によれば、ベース部材を電池に仮止めした状態で回路構成部材及び制御部材を組み付けることができるため、これらの部材をベース部材が移動可能な状態で組み付ける場合と比較して、作業性を向上することができる。   According to this configuration, since the circuit component member and the control member can be assembled with the base member temporarily fixed to the battery, the workability is improved as compared with the case where these members are assembled with the base member movable. Can be improved.

前記電池パックにおいて、前記ベース部材と前記被覆部材とは、両者が予め設定された向きとされた状態で互いに係止可能に構成されている一方、前記向き以外の向きとされた状態おいては係止不能とされていることが好ましい。   In the battery pack, the base member and the covering member are configured to be able to be locked to each other in a state in which both are set in a preset direction, while in a state in which the base member and the covering member are in a direction other than the direction. It is preferable that locking is impossible.

この構成によれば、ベース部材と被覆部材とが間違った向きで係止されるのを抑制することができる。   According to this structure, it can suppress that a base member and a coating | coated member are latched in the wrong direction.

本発明によれば、電池の小面積の端面に対して***材を確実に取り付けることができる。   According to the present invention, the safety member can be securely attached to the end surface of the small area of the battery.

以下、本発明の好ましい実施形態について図面を参照して説明する。   Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の実施形態に係る電池パック１の全体構成を示す斜視図である。図２は、図１の電池パック１の分解斜視図である。   FIG. 1 is a perspective view showing an overall configuration of a battery pack 1 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the battery pack 1 of FIG.

図１及び図２を参照して、電池パック１は、電池２と、電池２の端面に搭載された***材３と、前記***材３と反対側の電池２の端面に取り付けられた底部材４と、前記電池２の側面に巻き付けられたラベル（貼着部材）５とを備えている。   1 and 2, a battery pack 1 includes a battery 2, a safety member 3 mounted on the end surface of the battery 2, and a bottom member attached to the end surface of the battery 2 opposite to the safety member 3. 4 and a label (sticking member) 5 wound around the side surface of the battery 2.

電池２は、薄板状に形成されたリチウムイオン電池である。この電池２は、厚み方向（以下、前後方向と称す）と直交する方向に向く端面（以下、上端面と称す）６に形成された正極７及び負極８を有している。これら正極７及び負極８は、それぞれ電池２の幅方向（以下、正極７側を左、負極８側を右とする）に並んで配置されている。   The battery 2 is a lithium ion battery formed in a thin plate shape. The battery 2 includes a positive electrode 7 and a negative electrode 8 formed on an end surface (hereinafter referred to as an upper end surface) 6 that faces in a direction orthogonal to a thickness direction (hereinafter referred to as a front-rear direction). These positive electrode 7 and negative electrode 8 are arranged side by side in the width direction of the battery 2 (hereinafter, the positive electrode 7 side is the left and the negative electrode 8 side is the right).

***材３は、前記電池２の上端面６を覆うように設けられたベース部材９と、前記正極７及び負極８に電気的に接続された回路を構成するための回路構成部材１０と、所定の温度（誘因）が検知されたときに前記回路を遮断するサーモスタット１１と、前記回路構成部材１０及びサーモスタット１１を覆う被覆部材１２とを備えている。   The safety member 3 includes a base member 9 provided so as to cover the upper end surface 6 of the battery 2, a circuit constituent member 10 for constituting a circuit electrically connected to the positive electrode 7 and the negative electrode 8, a predetermined member A thermostat 11 that shuts off the circuit when a temperature (incentive) is detected, and a covering member 12 that covers the circuit constituent member 10 and the thermostat 11.

図３は、図２のベース部材９及び回路構成部材１０を電池２に組み付けた状態を示す斜視図である。図４は、図１のIV−IV線断面図である。   FIG. 3 is a perspective view showing a state in which the base member 9 and the circuit constituent member 10 of FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.

図２〜図４を参照して、ベース部材９は、合成樹脂からなる成形品である。このベース部材９は、電池２の上端面６よりも若干小さな面積とされたベース本体１４と、このベース本体１４の前後の端面からそれぞれ突出する左右一対の係止爪１５、１６と、これら係止爪１５と係止爪１６との間でベース本体１４上に立設する前後一対の支持板１７とを備えている。   2 to 4, the base member 9 is a molded product made of a synthetic resin. The base member 9 includes a base body 14 having an area slightly smaller than the upper end surface 6 of the battery 2, a pair of left and right locking claws 15 and 16 projecting from front and rear end surfaces of the base body 14, and A pair of front and rear support plates 17 standing on the base body 14 is provided between the pawl 15 and the locking pawl 16.

ベース本体１４は、両面テープ３２によって前記電池２の上端面６に貼り付けられている。また、ベース本体１４には、前記正極７及び負極８をそれぞれ上に露出させるための貫通孔１８及び１９が設けられている。   The base body 14 is affixed to the upper end surface 6 of the battery 2 with a double-sided tape 32. The base body 14 is provided with through holes 18 and 19 for exposing the positive electrode 7 and the negative electrode 8 upward.

係止爪１５、１６は、前記ベース本体１４の前端面から前にそれぞれ突出しているとともに、前記ベース本体１４の後端面からそれぞれ後ろに突出してしている。これら係止爪１５、１６は、図４に詳しく示すように、それぞれの下面が電池２の上端面６と略平行とされているとともに、それぞれの上面は先端に向かうに従い下がる傾斜面とされている。これにより、被覆部材１２を被せる際における被覆部材１２と係止爪１５、１６との間の摺動抵抗を少なくすることができ、係止爪１５、１６の変形を小さなものとすることができる。   The locking claws 15 and 16 protrude forward from the front end surface of the base body 14 and protrude rearward from the rear end surface of the base body 14. As shown in detail in FIG. 4, the lower surfaces of the locking claws 15 and 16 are substantially parallel to the upper end surface 6 of the battery 2, and the upper surfaces are inclined surfaces that descend toward the tip. Yes. Thereby, the sliding resistance between the covering member 12 and the locking claws 15 and 16 when the covering member 12 is covered can be reduced, and the deformation of the locking claws 15 and 16 can be made small. .

各支持板１７は、それぞれの上端面によって後述する基板２３の前後縁部を下から支持するようになっている。これにより、基板２３と電池２の上端面６との間には、サーモスタット１１及び後述するリード板２０〜２２を配置するためのスペースが確保される。   Each support plate 17 supports the front and rear edge portions of the substrate 23 to be described later from below by the respective upper end surfaces. Thereby, a space for arranging the thermostat 11 and lead plates 20 to 22 described later is secured between the substrate 23 and the upper end surface 6 of the battery 2.

図２〜図４を参照して、回路構成部材１０は、正極７に溶接された第１リード板２０と、この第１リード板２０上に溶接された第２リード板２１と、前記ベース本体１４上の右端に固定された第３リード板２２と、前記第２リード板２１及び第３リード板２２と電気的に接続された基板２３とを備えている。   2 to 4, the circuit component 10 includes a first lead plate 20 welded to the positive electrode 7, a second lead plate 21 welded on the first lead plate 20, and the base body. 14 is provided with a third lead plate 22 fixed to the right end on 14, and the second lead plate 21 and the substrate 23 electrically connected to the third lead plate 22.

第１リード板２０は、前記貫通孔１８内に圧入された状態で正極７に溶接されている。したがって、第１リード板２０の外側面と貫通孔１８の内側面との間の摺動抵抗によって、ベース部材９が電池２から外れ難くなっている。これに加えて、第２リード板２１は、電池２の上端面６とによってベース本体１４の左端部分を上下に挟むように第１リード板２０に溶接されているため、この第２リード板２１によってもベース部材９が電池２に固定されることになる。   The first lead plate 20 is welded to the positive electrode 7 while being press-fitted into the through hole 18. Therefore, the base member 9 is not easily detached from the battery 2 due to the sliding resistance between the outer surface of the first lead plate 20 and the inner surface of the through hole 18. In addition to this, the second lead plate 21 is welded to the first lead plate 20 so that the left end portion of the base body 14 is sandwiched between the upper end surface 6 of the battery 2 and the second lead plate 21. As a result, the base member 9 is fixed to the battery 2.

また、第２リード板２１は、上下に板片２１ａ、２１ｂが平行するコの字型の部分を有し、上の板片２１ａが基板２３に形成された回路パターンに電気的に接続されている。第３リード板２２は、上下に板片２２ａ、２２ｂが平行するコの字型に形成され、上の板片２２ａが基板２３の回路パターンに電気的に接続されている。   The second lead plate 21 has a U-shaped portion in which the upper and lower plate pieces 21 a and 21 b are parallel, and the upper plate piece 21 a is electrically connected to a circuit pattern formed on the substrate 23. Yes. The third lead plate 22 is formed in a U-shape in which the plate pieces 22 a and 22 b are parallel to each other on the upper and lower sides, and the upper plate piece 22 a is electrically connected to the circuit pattern of the substrate 23.

サーモスタット１１は、前記負極８に溶接されたリード部２４と、このリード部２４と電気的に接続された機能素子２５とを備えている。機能素子２５は、例えば、バイメタル等からなる変位板２５ａを有している。前記変位板２５ａは、***材３内部の温度が所定の温度となったときに変形して、前記第３リード板２２の下の板片２２ｂに接触し、又は板片２２ｂから離間することにより、電池２の熱暴走や内部短絡の発生を抑制する方向に前記基板２３の回路を制御するようになっている。なお、前記ベース本体１４に形成された孔１４ａは、サーモスタット１１に対して電池２の熱が伝わり易くするための連通孔として機能する。   The thermostat 11 includes a lead portion 24 welded to the negative electrode 8 and a functional element 25 electrically connected to the lead portion 24. The functional element 25 has a displacement plate 25a made of, for example, bimetal. The displacement plate 25a is deformed when the temperature inside the safety member 3 reaches a predetermined temperature, and comes into contact with or separates from the plate piece 22b below the third lead plate 22. The circuit of the substrate 23 is controlled in a direction to suppress the occurrence of thermal runaway and internal short circuit of the battery 2. The hole 14 a formed in the base body 14 functions as a communication hole for facilitating the heat of the battery 2 to be transmitted to the thermostat 11.

被覆部材１２は、前記ベース部材９及び回路構成部材１０を上方及び側方から覆うように有底容器状に形成された合成樹脂からなる成形品である。具体的に、被覆部材１２は、天板２６と、この天板２６の周縁から下方に延びる側壁２７と、この側壁２７から下方に延びる前後一対の延出部２８とを有している。   The covering member 12 is a molded product made of a synthetic resin formed in a bottomed container shape so as to cover the base member 9 and the circuit component member 10 from above and from the side. Specifically, the covering member 12 includes a top plate 26, a side wall 27 extending downward from the peripheral edge of the top plate 26, and a pair of front and rear extending portions 28 extending downward from the side wall 27.

天板２６は、前記電池２の上端面６よりも若干大きな面積に設定され、前記基板２３を上から覆うようになっている。この天板２６には、３つの開口２６ａが形成され、これら開口２６ａによって前記基板２３上に形成されたパッド２３ａが上に露出するようになっている。   The top plate 26 is set to have a slightly larger area than the upper end surface 6 of the battery 2 and covers the substrate 23 from above. Three openings 26a are formed in the top plate 26, and the pads 23a formed on the substrate 23 are exposed upward by these openings 26a.

側壁２７は、被覆部材１２が正規に取り付けられた状態において、その下端が電池２の上端面６と略同等の位置、又はこれより若干上の位置となる深さ寸法とされている（図４参照）。   The side wall 27 has a depth dimension such that, in a state where the covering member 12 is properly attached, the lower end of the side wall 27 is substantially the same position as or slightly above the upper end face 6 of the battery 2 (FIG. 4). reference).

各延出部２８は、前記側壁２７のうちの前後の長辺部からそれぞれ下方に延びて形成されている。これら延出部２８は、図４に示すように、それぞれ電池２の上端面６の高さ位置から電池２の高さ寸法の５％〜２０％、すなわち、１ｍｍ〜８ｍｍ、好ましくは２ｍｍ〜６ｍｍ下の位置までの範囲Ｅ１にわたり、電池２の側面にオーバーラップする深さ寸法とされている。また、延出部２８には、前後方向に貫通する左右一対の係止孔２８ａ、２８ｂが前記各係止爪１５、１６に対応する位置に設けられている。これら係止孔２８ａ、２８ｂ内にそれぞれ係止爪１５、１６が挿入することにより、ベース部材９と被覆部材１２とが係止されることとなる。   Each extending portion 28 is formed extending downward from the front and rear long side portions of the side wall 27. As shown in FIG. 4, these extending portions 28 are 5% to 20% of the height dimension of the battery 2 from the height position of the upper end surface 6 of the battery 2, that is, 1 mm to 8 mm, preferably 2 mm to 6 mm. The depth dimension overlaps the side surface of the battery 2 over the range E1 up to the lower position. The extending portion 28 is provided with a pair of left and right engaging holes 28 a and 28 b penetrating in the front-rear direction at positions corresponding to the respective engaging claws 15 and 16. The base member 9 and the covering member 12 are locked by inserting the locking claws 15 and 16 into the locking holes 28a and 28b, respectively.

底部材４は、両面テープ２９を介して電池２の下端面に固定されている。この底部材４は、電池２の前後の側面を挟むように配置された前後一対の立設板３０、３１を備えている。   The bottom member 4 is fixed to the lower end surface of the battery 2 via a double-sided tape 29. The bottom member 4 includes a pair of front and rear standing plates 30 and 31 disposed so as to sandwich the front and rear side surfaces of the battery 2.

ラベル５は、前記電池２の前後左右の側面に巻き付けられている。より具体的に、ラベル５は、前記各延出部２８の上端部から前記底部材４の立設板３０、３１の下端部までの範囲Ｅ２（図６参照）にわたり電池２の外側に巻きつけられている。このラベル５の貼着により、被覆部材１２と底部材４と電池２とが一体に保持されることになる。   The label 5 is wound around the front, rear, left and right sides of the battery 2. More specifically, the label 5 is wound around the outside of the battery 2 over a range E2 (see FIG. 6) from the upper end portion of each extending portion 28 to the lower end portions of the standing plates 30 and 31 of the bottom member 4. It has been. By attaching the label 5, the covering member 12, the bottom member 4, and the battery 2 are held together.

以下、図１、図３、図５及び図６を参照して、前記電池パック１の製造方法について説明する。   Hereinafter, a method for manufacturing the battery pack 1 will be described with reference to FIGS. 1, 3, 5, and 6.

まず、図１に示すように、ベース部材９を両面テープ３２によって電池２の上端面６に仮止めする。この状態で、図３に示すように、ベース本体１４の貫通孔１８に第１リード板２０を圧入するとともに、この第１リード板２０を正極７に溶接する。これにより、ベース部材９が電池２に固定される。   First, as shown in FIG. 1, the base member 9 is temporarily fixed to the upper end surface 6 of the battery 2 with a double-sided tape 32. In this state, as shown in FIG. 3, the first lead plate 20 is press-fitted into the through hole 18 of the base body 14, and the first lead plate 20 is welded to the positive electrode 7. Thereby, the base member 9 is fixed to the battery 2.

そして、前記第１リード板２０に対して第２リード板２１を溶接するとともに、貫通孔１９を通してサーモスタット１１のリード部２４を負極８に溶接し、さらに、第３リード板２２をベース本体１４上に取り付ける。   Then, the second lead plate 21 is welded to the first lead plate 20, the lead portion 24 of the thermostat 11 is welded to the negative electrode 8 through the through hole 19, and the third lead plate 22 is attached to the base body 14. Attach to.

次いで、図５に示すように、前記ベース部材９の支持板１７の上に基板２３を載置するとともに、この基板２３の上から被覆部材１２を被せることにより、図６に示すように、ベース部材９の各係止爪１５、１６を係止孔２８ａ、２８ｂに挿入して、被覆部材１２とベース部材９とを係止させる。   Next, as shown in FIG. 5, the substrate 23 is placed on the support plate 17 of the base member 9, and the covering member 12 is placed on the substrate 23 to cover the base member 9 as shown in FIG. 6. The locking claws 15 and 16 of the member 9 are inserted into the locking holes 28a and 28b, and the covering member 12 and the base member 9 are locked.

そして、図６に示す範囲Ｅ２にわたりラベル５を電池２の側面に巻きつけるように貼着する。つまり、前記電池２の側面の上部にオーバーラップして配置された延出部２８と、電池２の側面とに跨るようにして、電池２及び***材３の双方を側方からラベル５によって巻きつける。これにより、***材３が電池２に対して固定される。   Then, the label 5 is stuck so as to be wound around the side surface of the battery 2 over a range E2 shown in FIG. That is, both the battery 2 and the safety member 3 are wound from the side by the label 5 so as to straddle the extending portion 28 arranged to overlap the upper part of the side surface of the battery 2 and the side surface of the battery 2. Put on. Thereby, the safety member 3 is fixed to the battery 2.

以上説明したように、前記電池パック１によれば、係止爪１５、１６によりベース部材９と被覆部材１２とが互いに係止されるとともに、ラベル５が電池２の側面に巻きつけられることにより、延出部２８と電池２とが固定されることになる。つまり、ラベル５によって電池２に固定されたベース部材９に対して被覆部材１２が係止されているため、これらベース部材９及び被覆部材１２を電池２に固定することが可能となる。   As described above, according to the battery pack 1, the base member 9 and the covering member 12 are locked to each other by the locking claws 15 and 16, and the label 5 is wound around the side surface of the battery 2. The extending portion 28 and the battery 2 are fixed. That is, since the covering member 12 is locked to the base member 9 fixed to the battery 2 by the label 5, the base member 9 and the covering member 12 can be fixed to the battery 2.

そして、前記電池パック１においては、電池２の厚み方向（前後方向）と直交する方向（上）に向く上端面６に設けられるベース部材９から前後方向に係止爪１５、１６を突出させているため、前記端面６上のスペースを回路構成部材１０及びサーモスタット１１のために有効に活用しながら、当該上端面６の外側に係止爪１５、１６を設けることができる。そして、この係止爪１５、１６及びラベル５を利用して***材３と電池２とを固定することができるので、電池２の小面積の上端面６に対しても***材３を確実に取り付けることができる。   And in the said battery pack 1, the latching claws 15 and 16 are made to protrude in the front-back direction from the base member 9 provided in the upper end surface 6 which faces in the direction (upward) orthogonal to the thickness direction (front-back direction) of the battery 2. Therefore, the locking claws 15 and 16 can be provided outside the upper end surface 6 while effectively utilizing the space on the end surface 6 for the circuit component 10 and the thermostat 11. And since the safety member 3 and the battery 2 can be fixed using these latching claws 15 and 16 and the label 5, the safety member 3 can be securely attached to the upper end surface 6 of the small area of the battery 2. Can be attached.

また、前記電池パック１では、係止爪１５、１６を前後方向に突出させているため、この係止爪１５、１６と係止するための構成が電池２の厚み方向と直交する上下方向に並ぶのを抑制することができるため、同方向に電池パック１全体が大きくなるのを抑制することができる。   Further, in the battery pack 1, the locking claws 15, 16 are projected in the front-rear direction, so that the configuration for locking with the locking claws 15, 16 is in the vertical direction perpendicular to the thickness direction of the battery 2. Since it can suppress that it arranges, it can suppress that the battery pack 1 whole becomes large in the same direction.

前記実施形態のように、延出部２８に形成された係止孔２８ａ、２８ｂに係止爪１５、１６を挿入させる構成によれば、延出部２８がラベル５によって電池２の側面に固定されることにより、係止を解除する方向の延出部２８の移動が拘束されて、延出部２８と係止爪１５、１６との係止状態をより確実に保持することができる。   According to the configuration in which the locking claws 15 and 16 are inserted into the locking holes 28 a and 28 b formed in the extending portion 28 as in the above embodiment, the extending portion 28 is fixed to the side surface of the battery 2 by the label 5. As a result, the movement of the extending portion 28 in the direction of releasing the locking is restrained, and the locking state between the extending portion 28 and the locking claws 15 and 16 can be more reliably maintained.

なお、前記実施形態では、延出部２８を前後に貫通する係止孔２８ａ、２８ｂを例に挙げて説明しているが、延出部２８を必ずしも貫通している必要はなく、例えば、延出部２８の内側面に係止爪１５、１６と係止可能な鉤形状を施しておけば、延出部２８と係止爪１５、１６とを係止することができる。   In the embodiment described above, the locking holes 28a and 28b penetrating the extending portion 28 in the front-rear direction are described as examples. However, the extending portions 28 are not necessarily penetrated. If a hook shape that can be locked to the locking claws 15, 16 is provided on the inner side surface of the protruding portion 28, the extending portion 28 and the locking claws 15, 16 can be locked.

前記電池パック１のように、ベース部材９が電池２の上端面６から所定の間隔を空けて基板２３を保持するように構成され、これら基板２３と電池２の上端面６との間に第１〜第３リード板２０〜２２を配置するようにした構成によれば、係止爪１５、１６を設けるためのベース部材９を利用して、第１〜第３リード板２０〜２２の配置のためのスペースを確保しながら、基板２３を保持することができる。   Like the battery pack 1, the base member 9 is configured to hold the substrate 23 at a predetermined interval from the upper end surface 6 of the battery 2, and between the substrate 23 and the upper end surface 6 of the battery 2, According to the configuration in which the first to third lead plates 20 to 22 are arranged, the arrangement of the first to third lead plates 20 to 22 is performed using the base member 9 for providing the locking claws 15 and 16. The board | substrate 23 can be hold | maintained, ensuring the space for.

前記電池パック１のように、ベース部材９の貫通孔１８に対し、正極７に溶接された第１リード板２０を圧入することにより、ベース部材９と電池２とを固定する構成とすれば、貫通孔１８に対する第１リード板２０の摺動抵抗によってベース部材９を電池に固定することができる。   If the base member 9 and the battery 2 are fixed by press-fitting the first lead plate 20 welded to the positive electrode 7 into the through hole 18 of the base member 9 as in the battery pack 1, The base member 9 can be fixed to the battery by the sliding resistance of the first lead plate 20 with respect to the through hole 18.

また、前記第１リード板２０に溶接された第２リード板２１と電池２との間でベース部材９の一部を挟むようにした構成とすれば、第２リード板２１と電池２の上端面６との間にベース部材９を挟持させることができる。   Further, if a configuration is adopted in which a part of the base member 9 is sandwiched between the second lead plate 21 welded to the first lead plate 20 and the battery 2, the second lead plate 21 and the battery 2 are placed on top of each other. The base member 9 can be sandwiched between the end surface 6.

前記電池パック１のように、ベース部材９を両面テープ３２によって電池２の上端面６に仮止めするようにした構成によれば、ベース部材９を電池２に仮止めした状態で回路構成部材１０及びサーモスタット１１を組み付けることができるため、作業性を向上することができる。   According to the configuration in which the base member 9 is temporarily fixed to the upper end surface 6 of the battery 2 with the double-sided tape 32 as in the battery pack 1, the circuit component member 10 is temporarily fixed to the battery 2. And since the thermostat 11 can be assembled | attached, workability | operativity can be improved.

なお、前記電池パック１において、ベース部材９と被覆部材１２とを両者の係止状態を解除することなく分解したときに、ベース部材９、被覆部材１２の少なくとも一方が破壊するように、ベース部材９及び被覆部材１２の強度を設定することが好ましい。   In the battery pack 1, when the base member 9 and the covering member 12 are disassembled without releasing their locked state, at least one of the base member 9 and the covering member 12 is destroyed. 9 and the strength of the covering member 12 are preferably set.

このようにすれば、ベース部材９と被覆部材１２とを無理に分解したときに、これら部材の少なくとも一方が破壊されるため、***材３が他の電池２に再利用されるのを抑制することができる。   In this way, when the base member 9 and the covering member 12 are forcibly disassembled, at least one of these members is destroyed, so that the safety member 3 is prevented from being reused by another battery 2. be able to.

具体的に、例えば、被覆部材１２を無理やりベース部材９から取り外そうとしたときに、前記各係止爪１５、１６が潰れるように、ベース部材９の材質を被覆部材１２の材質よりもやわらかいものとすることができる。また、強度の調整は、材質を異なるものとするだけでなく肉厚寸法の調整によっても行うことができる。   Specifically, for example, when the covering member 12 is forcibly removed from the base member 9, the material of the base member 9 is softer than the material of the covering member 12 so that the locking claws 15 and 16 are crushed. Can be. The strength can be adjusted not only by using different materials, but also by adjusting the wall thickness.

また、前記電池パック１では、前後に等間隔で係止爪１５、１６を設けているが、例えば、これら係止爪１５、１６の間隔を前後で異なるものとし、これに応じて被覆部材１２の係止孔２８ａ、２８ｂの間隔を設定することにより、ベース部材９に対して被覆部材１２を係止するための向きを一の向きに規制することができる。このようにすれば、被覆部材１２を正規の位置から左右に１８０°反転した状態で、ベース部材９に取り付けられるのを抑制することができる。   Further, in the battery pack 1, the locking claws 15 and 16 are provided at equal intervals in the front and rear. For example, the intervals between the locking claws 15 and 16 are different in the front and rear, and the covering member 12 is correspondingly changed. By setting the interval between the locking holes 28a and 28b, the direction for locking the covering member 12 with respect to the base member 9 can be restricted to one direction. If it does in this way, it can control that covering member 12 is attached to base member 9 in the state where 180 degrees turned right and left from the regular position.

なお、ベース部材９と被覆部材１２との係止のための向きを規制することは、係止爪１５、１６の間隔の調整だけでなく、例えば、係止爪１５、１６及び係止孔２８ａ、２８ｂの数を前後で異なるものとすることや、ベース部材９及び被覆部材１２の上から見たときの形状が点対象とならない形状とすることによっても行うことができる。   The direction for locking the base member 9 and the covering member 12 is regulated not only by adjusting the distance between the locking claws 15 and 16 but also by, for example, the locking claws 15 and 16 and the locking holes 28a. , 28b may be different between before and after, or the shape when viewed from above the base member 9 and the covering member 12 may be a shape that does not become a point object.

本発明の実施形態に係る電池パックの全体構成を示す斜視図である。It is a perspective view which shows the whole structure of the battery pack which concerns on embodiment of this invention. 図１の電池パックの分解斜視図である。It is a disassembled perspective view of the battery pack of FIG. 図２のベース部材及び回路構成部材を電池に組み付けた状態を示す斜視図である。It is a perspective view which shows the state which assembled | attached the base member and circuit structure member of FIG. 2 to the battery. 図１のIV−IV線断面図である。It is the IV-IV sectional view taken on the line of FIG. 図２の電池パックについてベース部材及び回路構成部材を組み付けた状態を示す斜視図である。It is a perspective view which shows the state which assembled | attached the base member and the circuit structural member about the battery pack of FIG. 図５の電池パックについて被覆部材を組み付けた状態を示す斜視図である。It is a perspective view which shows the state which assembled | attached the coating | coated member about the battery pack of FIG.

符号の説明Explanation of symbols

１ 電池パック
２ 電池
３ ***材
５ ラベル（仮止め部材）
７ 正極
８ 負極
９ ベース部材
１０ 回路構成部材
１１ サーモスタット（制御部材）
１２ 被覆部材
１５、１６ 係止爪
２０〜２２ リード板（導電部材）
２３ 基板
２８ 延出部
２８ａ 係止孔 DESCRIPTION OF SYMBOLS 1 Battery pack 2 Battery 3 Safety member 5 Label (temporary fixing member)
7 Positive electrode 8 Negative electrode 9 Base member 10 Circuit component member 11 Thermostat (control member)
12 Cover member 15, 16 Locking claw 20-22 Lead plate (conductive member)
23 Substrate 28 Extension part 28a Locking hole

Claims (10)

厚み方向と直交する方向に向く端面に電極が形成された電池と、前記電池の端面に搭載された***材とを有する電池パックであって、
前記***材は、前記電極を露出させた状態で前記電池の端面を覆うとともに前記電池の厚み方向に突出する係止爪を有するベース部材と、前記電極と電気的に接続された回路を構成するための回路構成部材と、所定の誘因が検知されたときに前記回路を制御する制御部材と、前記回路構成部材及び前記制御部材を覆った状態で前記ベース部材の係止爪と係止可能な被覆部材と、前記被覆部材に設けられ、前記回路構成部材及び制御部材を覆った状態で前記電池の厚み方向の側面まで延びる延出部とを備え、
前記電池の側面に巻きつけられるように前記電池の側面及び前記被覆部材の延出部に貼着される貼着部材をさらに備えていることを特徴とする電池パック。 A battery pack having a battery in which an electrode is formed on an end surface facing a direction perpendicular to the thickness direction, and a safety member mounted on the end surface of the battery,
The safety member forms a circuit electrically connected to the electrode, and a base member having a locking claw that covers the end face of the battery with the electrode exposed and protrudes in the thickness direction of the battery. And a control member that controls the circuit when a predetermined incentive is detected, and can be locked with a locking claw of the base member in a state of covering the circuit component and the control member A covering member, and an extending portion provided on the covering member and extending to a side surface in the thickness direction of the battery in a state of covering the circuit component member and the control member,
The battery pack further comprising a sticking member that is stuck to the side face of the battery and the extending portion of the covering member so as to be wound around the side face of the battery. 前記延出部には、前記ベース部材の係止爪と係止可能な係止部が形成されていることを特徴とする請求項１に記載の電池パック。   The battery pack according to claim 1, wherein a locking portion that can be locked with a locking claw of the base member is formed in the extension portion. 前記延出部には、前記係止爪が挿入される孔が前記係止部として形成されていることを特徴とする請求項２に記載の電池パック。   The battery pack according to claim 2, wherein a hole into which the locking claw is inserted is formed in the extension portion as the locking portion. 前記回路構成部材は、基板と、前記基板と前記電池の電極とを電気的に接続するための導電部材とを備え、前記ベース部材は、前記電池の端面から所定の間隔を空けて前記基板を保持するように構成されているとともに、前記導電部材は、前記基板と電池との間に設けられていることを特徴とする請求項１〜３の何れか１項に記載の電池パック。   The circuit component member includes a substrate and a conductive member for electrically connecting the substrate and the electrode of the battery, and the base member holds the substrate at a predetermined interval from an end surface of the battery. The battery pack according to claim 1, wherein the battery pack is configured to be held, and the conductive member is provided between the substrate and the battery. 前記導電部材は、前記電池の電極に固定された固定部材を備え、前記固定部材を介して前記ベース部材と電池とが互いに固定されていることを特徴とする請求項４に記載の電池パック。   The battery pack according to claim 4, wherein the conductive member includes a fixing member fixed to an electrode of the battery, and the base member and the battery are fixed to each other via the fixing member. 前記固定部材は、前記電池の端面との間で前記ベース部材の一部を挟んだ状態で前記電極に固定されていることを特徴とする請求項５に記載の電池パック。   The battery pack according to claim 5, wherein the fixing member is fixed to the electrode in a state where a part of the base member is sandwiched between an end surface of the battery. 前記ベース部材には、前記固定部材を通すための貫通孔が形成されており、前記固定部材が前記貫通孔に圧入されることにより、前記ベース部材が電池に固定されていることを特徴とする請求項５又は６に記載の電池パック。   The base member is formed with a through hole for allowing the fixing member to pass therethrough, and the base member is fixed to the battery by press-fitting the fixing member into the through hole. The battery pack according to claim 5 or 6. 前記ベース部材と前記被覆部材とを両者の係止状態を解除することなく分解したときに前記ベース部材、前記被覆部材の少なくとも一方が破壊するように、前記ベース部材及び被覆部材の強度が設定されていることを特徴とする請求項１〜７の何れか１項に記載の電池パック。   The strength of the base member and the covering member is set such that at least one of the base member and the covering member is destroyed when the base member and the covering member are disassembled without releasing the locking state of both. The battery pack according to claim 1, wherein the battery pack is a battery pack. 前記ベース部材を前記電池の端面に仮止めするための仮止め部材をさらに備えていることを特徴とする請求項１〜８の何れか１項に記載の電池パック。   The battery pack according to claim 1, further comprising a temporary fixing member for temporarily fixing the base member to an end surface of the battery. 前記ベース部材と前記被覆部材とは、両者が予め設定された向きとされた状態で互いに係止可能に構成されている一方、前記向き以外の向きとされた状態おいては係止不能とされていることを特徴とする請求項１〜９の何れか１項に記載の電池パック。   The base member and the covering member are configured to be able to be locked with each other in a state in which both are set in a preset direction, while in the state in which the base member and the covering member are set in directions other than the above direction, they cannot be locked. The battery pack according to claim 1, wherein the battery pack is a battery pack.
JP2008032055A 2008-02-13 2008-02-13 Battery pack Active JP5243810B2 (en)

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JP2010219035A (en) * 2009-02-20 2010-09-30 Hitachi Maxell Ltd Battery pack and battery pack manufacturing method
JP2011091046A (en) * 2009-10-21 2011-05-06 Samsung Sdi Co Ltd Battery assembly
JP2011154999A (en) * 2010-01-26 2011-08-11 Samsung Sdi Co Ltd Battery assembly
KR101775546B1 (en) 2012-03-29 2017-09-06 삼성에스디아이 주식회사 Rechargeable battery

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JP2010219035A (en) * 2009-02-20 2010-09-30 Hitachi Maxell Ltd Battery pack and battery pack manufacturing method
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