JP2003162987A - Board-integrated battery and battery pack - Google Patents

Board-integrated battery and battery pack

Info

Publication number
JP2003162987A
JP2003162987A JP2002358930A JP2002358930A JP2003162987A JP 2003162987 A JP2003162987 A JP 2003162987A JP 2002358930 A JP2002358930 A JP 2002358930A JP 2002358930 A JP2002358930 A JP 2002358930A JP 2003162987 A JP2003162987 A JP 2003162987A
Authority
JP
Japan
Prior art keywords
battery
resin
substrate
main body
resin molded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002358930A
Other languages
Japanese (ja)
Inventor
Kanehito Masumoto
兼人 増本
Katsumi Takatsu
克己 高津
Kunio Tsuruta
邦夫 鶴田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2002358930A priority Critical patent/JP2003162987A/en
Publication of JP2003162987A publication Critical patent/JP2003162987A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a board-integrated battery in which a secondary battery and a circuit board are integrated with a mold resin, and to provide a battery pack. <P>SOLUTION: The resin is filled in between a battery body 101 and a circuit board 102 electrically connected to the battery body to integrate both. Notched parts are formed at both ends of the board 120, and the outer peripheral shape except the notched parts agrees with a shape of both side-faces of the secondary battery. <P>COPYRIGHT: (C)2003,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、外部接続性及び安
全性を向上させた電池及び小型の携帯電子機器等の電池
電源に適するように小型薄型化を図った電池パックの堅
牢性の向上に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery pack having improved external connectivity and safety, and an improved robustness of a battery pack which is made compact and thin so as to be suitable for a battery power source for small portable electronic devices and the like. It is a thing.

【0002】[0002]

【従来の技術】携帯電子機器の小型化あるいは薄型化、
更には高機能化の進展は著しく、それに伴ってその電源
となる電池あるいは電池パックに小型、薄型で高容量化
が要求されている。小型で高容量化を可能にする電池と
してリチウム系電池が有効であり、中でも扁平な角形の
リチウムイオン二次電池は機器の薄型化に好適であり、
繰り返し使用ができる二次電池として携帯電話機などの
携帯電子機器への適用が増加している。
2. Description of the Related Art Miniaturization or thinning of portable electronic devices,
Further, the progress of higher functionality is remarkable, and accordingly, a battery or a battery pack serving as a power source thereof is required to be small and thin and have a high capacity. A lithium-based battery is effective as a battery that is small and enables high capacity, and among them, a flat prismatic lithium-ion secondary battery is suitable for thinning the device,
As a rechargeable secondary battery, its application to mobile electronic devices such as mobile phones is increasing.

【0003】前記リチウム系電池はエネルギー密度が高
く、電解液として可燃性の有機溶媒を用いているため、
安全性への配慮が重要となる。何らかの原因によって異
常が生じたときにも人体や機器に損傷を与えないように
安全性を確保する必要がある。例えば、電池の正極、負
極間が何らかの原因によって短絡した場合、エネルギー
密度の高い電池では過大な短絡電流が流れ、内部抵抗に
よってジュール熱が発生して電池は温度上昇する。電池
が高温になると正極板活物質と電解液との反応や電解液
の気化、分解などが生じて電池内部のガス圧が急上昇
し、電池は破裂や発火に至る恐れがある。電池が高温状
態に陥る原因は上記外部短絡だけでなく、二次電池を過
充電した場合や、電池を装填した携帯電子機器を暖房機
の傍らに置いたり、炎天下に駐車した車内に放置した場
合なども該当する。
Since the lithium-based battery has a high energy density and uses a flammable organic solvent as an electrolytic solution,
Consideration of safety is important. It is necessary to ensure safety so as not to damage the human body or equipment even if an abnormality occurs for some reason. For example, when a short circuit occurs between the positive electrode and the negative electrode of the battery for some reason, an excessive short-circuit current flows in the battery having high energy density, Joule heat is generated due to internal resistance, and the temperature of the battery rises. When the temperature of the battery rises, the reaction between the positive electrode active material and the electrolytic solution, vaporization and decomposition of the electrolytic solution may occur, and the gas pressure inside the battery may rise rapidly, which may cause the battery to burst or ignite. Not only the above-mentioned external short circuit causes the battery to fall into a high temperature state, but also when the secondary battery is overcharged, the portable electronic device with the battery placed near the heater, or left in the car parked in the hot sun. And so on.

【0004】リチウム系電池では、電池が異常状態に陥
ることを防止すると共に、異常状態に陥った場合にも危
険な状態にならないようにする機能が設けられる。電池
自体の機能として、極板の活物質や電解液が過剰な反応
を起こしにくいように工夫され、セパレータとして用い
られるポリオレフィン系微多孔膜は異常な高温になると
軟化して細孔が塞がれることによるシャットダウン機能
が備わっている。また、異常に温度上昇したときに入出
力回路を遮断する温度ヒューズや異常内圧を外部に放出
する安全弁が設けられ、円筒形のリチウム電池では、封
口部に入出力回路と直列に接続したPTC(Posit
ive Temperature Coeffcien
t)素子を配設して、外部短絡による過大電流を制限す
る保護機能が設けられている。
The lithium-based battery is provided with a function of preventing the battery from falling into an abnormal state and preventing a dangerous state even if the battery falls into an abnormal state. The function of the battery itself is to prevent excessive reaction of the active material and electrolyte of the electrode plate, and the polyolefin microporous film used as a separator softens and closes its pores at abnormally high temperatures. It has a shutdown function. In addition, a temperature fuse that shuts off the input / output circuit when the temperature rises abnormally and a safety valve that releases the abnormal internal pressure to the outside are provided. In a cylindrical lithium battery, the PTC (connected to the input / output circuit in series at the sealing part) Posit
Ive Temperature Coeffcien
t) An element is provided to provide a protection function for limiting an excessive current due to an external short circuit.

【0005】電池内に前記温度ヒューズやPTC素子を
設けることができない小型の電池や角形の電池では、外
付けの回路部品としてPTC素子や温度ヒューズが配線
接続され、更に二次電池では過充電や過放電から二次電
池を保護する電池保護回路を構成した回路基板が設けら
れ、これらの構成要素は二次電池と共にパックケース内
に収容して電池パックの形態に構成される。
In the case of a small battery or a prismatic battery in which the thermal fuse or the PTC element cannot be provided in the battery, the PTC element or the thermal fuse is connected by wiring as an external circuit component, and the secondary battery is overcharged or overcharged. A circuit board that constitutes a battery protection circuit that protects the secondary battery from over-discharge is provided, and these components are housed in a pack case together with the secondary battery to form a battery pack.

【0006】しかし、パックケースは樹脂成形によって
製造されるため、成形用金型の製作費が高く、その費用
がパックケースのコストに加わってコストアップをまね
くことや、金型の開発期間が長いこともあって、携帯電
話機のように新機種の投入間隔が短い携帯電子機器の電
池パックに対応させることが困難になっている。また、
樹脂成形における成形可能な肉厚には限度があり、逆に
強度を保持するためには肉厚を増す必要があり、電池パ
ックの小型化、薄型化に限度がある。
However, since the pack case is manufactured by resin molding, the manufacturing cost of the molding die is high, the cost is added to the cost of the pack case, and the cost is increased, and the development period of the mold is long. For this reason, it is difficult to support a battery pack of a portable electronic device such as a mobile phone in which a new model has a short insertion interval. Also,
There is a limit to the wall thickness that can be molded in resin molding, and conversely it is necessary to increase the wall thickness in order to maintain strength, and there is a limit to downsizing and thinning the battery pack.

【0007】また、電池や電池パックは、それを分解す
ることによる危険性や間違った使用や興味本位で使用さ
れることを防ぐために、分解し難いように構成すること
や、分解したことが分かるように構成することが安全確
保上で重要である。また、携帯電子機器に適用されるこ
とを考慮すると、落下等による衝撃や振動に耐え得る堅
牢な構造や電子回路部位の耐湿性が要求される。このよ
うな分解し難く堅牢且つ耐湿性を有する構造を実現すべ
く、電池保護回路等を構成した回路基板と電池とを樹脂
モールディングにより一体化することが構想されてい
る。
Further, it can be seen that the battery or the battery pack is constructed so that it is difficult to disassemble or that it has been disassembled in order to prevent the danger of disassembling the battery, the wrong use, or the use of the battery in an interesting manner. It is important to ensure the safety of the structure. Further, considering that it is applied to portable electronic devices, it is required to have a robust structure capable of withstanding shock and vibration due to a drop or the like and moisture resistance of electronic circuit parts. In order to realize such a structure that is hard to disassemble, is robust, and has moisture resistance, it is envisioned that the circuit board that constitutes the battery protection circuit and the battery are integrated by resin molding.

【0008】上記樹脂モールディングによる電池パック
は、特許文献1および特許文献2に開示されたものがあ
り、二次電池と回路基板とを接続部材により固定した中
間完成品を金型内に配置し、回路基板に形成した外部接
続端子が外部露出するようにして中間完成品の周囲に樹
脂を充填して二次電池と回路基板とを一体化している。
Battery packs using the above resin molding are disclosed in Patent Documents 1 and 2, and an intermediate finished product in which a secondary battery and a circuit board are fixed by a connecting member is placed in a mold, A resin is filled around the intermediate finished product so that the external connection terminals formed on the circuit board are exposed to the outside to integrate the secondary battery and the circuit board.

【0009】また、特許文献3では、二次電池と回路基
板とを接続部材により接続したものを金型内に配置し、
回路基板を樹脂封止して二次電池上又はパックケース
(電池蓋体)に固定する構成、あるいは回路基板と二次
電池とを樹脂封止する構成が開示されている。
Further, in Patent Document 3, a secondary battery and a circuit board connected by a connecting member are placed in a mold,
There is disclosed a configuration in which a circuit board is resin-sealed and fixed on a secondary battery or a pack case (battery lid), or a circuit board and a secondary battery are resin-sealed.

【0010】[0010]

【特許文献1】特開2002−134077号公報[Patent Document 1] Japanese Patent Laid-Open No. 2002-134077

【0011】[0011]

【特許文献2】特開2002−166447号公報[Patent Document 2] Japanese Patent Laid-Open No. 2002-166447

【0012】[0012]

【特許文献3】特開2000−315483号公報[Patent Document 3] Japanese Patent Laid-Open No. 2000-315483

【0013】[0013]

【発明が解決しようとする課題】携帯電子機器などの電
源として用いられる小型の電池に前述した温度ヒューズ
やPTC素子などの電子部品を接続するには、電池と電
子部品とをケース内に収容した電池パックの形態に構成
する必要があり、コストアップにつながる。また、前記
温度ヒューズやPTC素子などの熱感応素子は電池と熱
結合させた状態に配置することが重要で、電池と一体化
した構造に構成する必要がある。従って、電池パックの
形態に構成することなく、電池の外部に熱感応素子を一
体化した構造の電池が望まれている。
In order to connect the electronic components such as the above-mentioned temperature fuse and PTC element to a small battery used as a power source for portable electronic equipment, the battery and the electronic components are housed in a case. It is necessary to form the battery pack, which leads to an increase in cost. Further, it is important that the heat sensitive element such as the thermal fuse and the PTC element is arranged in a state of being thermally coupled to the battery, and it is necessary to form a structure integrated with the battery. Therefore, there is a demand for a battery having a structure in which a heat sensitive element is integrated with the outside of the battery without forming the battery pack.

【0014】また、二次電池の場合には、電池温度を検
出して充電制御や安全制御などに利用される。前記電池
温度を検出するために、二次電池に接してサーミスタ等
の温度検出センサが配置され、検出出力を制御回路に入
力する他、外部接続端子から充電器に提供するように構
成される。温度検出センサを配設するには電池パックの
形態に構成することになるが、電池パックの製造工数が
増加するばかりでなく、電池温度を正確に検出できるよ
うに配置するための構造を設けるためにコストアップが
伴う問題点があった。
In the case of a secondary battery, the battery temperature is detected and used for charging control, safety control and the like. In order to detect the battery temperature, a temperature detection sensor such as a thermistor is arranged in contact with the secondary battery, and the detection output is input to the control circuit and is also provided to the charger from the external connection terminal. The temperature detection sensor is arranged in the form of a battery pack, but not only the number of manufacturing steps of the battery pack is increased, but also a structure for arranging so as to accurately detect the battery temperature is provided. There was a problem with the increase in cost.

【0015】また、小型の電池はその構造上から正極、
負極は異なる面に形成されている。正極、負極を同一平
面上や接続に容易となる面に形成できれば使用上の便が
向上する。例えば、円筒形の電池では一方端に正極、他
方端に負極が形成されている。従って、この電池を使用
する機器側では、電池の収容スペースの両側に電池の正
極、負極に接続するための接続部材を配設することにな
る。また、角形の電池では、封口部に正極、負極を設け
ることができるが、両極は同一平面上になく、段差があ
るため、外部接続構造が複雑になる問題がある。機器の
小型化あるいは薄型化に伴って電池の正極、負極に対す
る外部接続構造を簡易に構成したい要求が高まってい
る。
A small battery has a positive electrode because of its structure,
The negative electrodes are formed on different surfaces. If the positive electrode and the negative electrode can be formed on the same plane or on a surface that facilitates connection, convenience in use is improved. For example, in a cylindrical battery, a positive electrode is formed at one end and a negative electrode is formed at the other end. Therefore, on the equipment side using this battery, connecting members for connecting to the positive electrode and the negative electrode of the battery are arranged on both sides of the accommodation space of the battery. Further, in the prismatic battery, the positive electrode and the negative electrode can be provided in the sealing portion, but since both electrodes are not on the same plane and there is a step, there is a problem that the external connection structure becomes complicated. Along with the downsizing and thinning of devices, there is an increasing demand for a simple structure of an external connection structure for the positive electrode and the negative electrode of a battery.

【0016】また、樹脂モールドにより電池と回路基板
等を一体化するとき、樹脂が電池や回路基板に接合しな
いので一体化が充分になされず、樹脂モールドで電池や
回路基板を包み込む必要があり、結果的に樹脂成形され
たパックケースに電池や回路基板を収容した電池パック
と同様の形態となり、小型化や薄型化を達成することが
できない課題があった。
Further, when the battery and the circuit board are integrated with the resin mold, the resin is not joined to the battery or the circuit board, so that the integration is not sufficient and it is necessary to wrap the battery and the circuit board with the resin mold. As a result, the battery pack has the same form as a battery pack in which a battery and a circuit board are housed in a resin-molded pack case, and there is a problem that miniaturization and thinning cannot be achieved.

【0017】上記特許文献3に開示された構成において
は、回路基板は両面テープにより電池に固定した後に樹
脂モールドがなされ、樹脂は少なくとも電池の3面にま
たがってモールドされるため、電池と回路基板とが固着
した状態になるが、前述したように樹脂と金属とは基本
的に接合していないため、振動や衝撃を受けた場合など
に樹脂モールドは電池から剥がれる恐れが多分にある。
電池や電池パックは携帯電子機器に適用することを主目
的としており、振動や衝撃は不可避であり、樹脂モール
ドが電池などの金属に係合した状態を得る必要がある。
In the structure disclosed in Patent Document 3, the circuit board is fixed to the battery with the double-sided tape and then resin-molded, and the resin is molded over at least three surfaces of the battery. However, since the resin and the metal are basically not bonded to each other as described above, there is a possibility that the resin mold may peel off from the battery when subjected to vibration or shock.
Batteries and battery packs are mainly applied to portable electronic devices, vibration and shock are unavoidable, and it is necessary to obtain a state in which a resin mold is engaged with a metal such as a battery.

【0018】また、同上従来技術においては、電池パッ
クの外部接続構造は、樹脂モールドされた中の回路基板
から外に引き出したリード線の先端にコネクタが設けら
れており、機器との接続は機器側のコネクタと雄雌間の
嵌合によってなされる。この外部接続構造は比較的大型
の機器で電池収容スペースに余裕がある場合には問題は
ないが、本願発明の電池パックが主目的とする小型の機
器では電池収容スペースに余裕が少ないのが当然で、こ
の接続構造を適用することは困難である。本願発明の電
池又は電池パックの機器側との接続構造は、機器側の電
池収容スペースに電池又は電池パックを収納したとき、
そこに設けられた機器側接触端子(プローブ)が電池又
は電池パックの所定位置に外部露出する外部接続端子に
圧接するようにしたものである。外部接続端子を形成し
た回路基板と電池とを樹脂モールドして電池パックに構
成し、機器側の電池収容スペースに設けられた機器側接
続端子と前記外部接続端子とが接触抵抗が小さい状態に
圧接させるには、電池パックの外形寸法及び外部接続端
子の位置は高精度に形成する必要がある。このような接
触による接続の場合に、形成精度が低いと、機器側接続
端子と外部接続端子との接触抵抗が大きくなり、接触不
良や電圧降下などの異常を来すことになる。
Further, in the above prior art, in the external connection structure of the battery pack, the connector is provided at the tip of the lead wire drawn out from the resin-molded circuit board, and the connection with the device is made by the device. It is made by fitting between the connector on the side and the male and female. This external connection structure is not a problem when the battery accommodation space is relatively large in a relatively large device, but it is natural that the battery accommodation space is small in the small device mainly intended by the battery pack of the present invention. Therefore, it is difficult to apply this connection structure. The connection structure with the device side of the battery or battery pack of the present invention, when the battery or battery pack is stored in the battery storage space of the device side,
A device side contact terminal (probe) provided there is pressed against an external connection terminal exposed to a predetermined position of a battery or a battery pack. A circuit board on which external connection terminals are formed and a battery are resin-molded to form a battery pack, and the device-side connection terminals provided in the battery-accommodating space on the device side and the external connection terminals are pressure-welded to each other with a low contact resistance To do so, the external dimensions of the battery pack and the positions of the external connection terminals must be formed with high accuracy. In the case of connection by such contact, if the forming accuracy is low, the contact resistance between the device-side connection terminal and the external connection terminal becomes large, resulting in abnormalities such as poor contact and voltage drop.

【0019】本発明が目的とするところは、電池と基板
とを樹脂モールディングにより一体化した電池及び電池
パックを提供することにある。
An object of the present invention is to provide a battery and a battery pack in which a battery and a substrate are integrated by resin molding.

【0020】[0020]

【課題を解決するための手段】上記目的を達成するため
の本発明は、1又は複数の電池本体と、この電池本体の
上面に対して平行に配設されて少なくとも外部接続用端
子が形成された基板と、この基板と前記電池本体とを電
気的に接続する接続部材と、充填成形された樹脂が電池
本体及び基板それぞれの任意面に固着して両者を一体化
した樹脂モールド体と、この樹脂モールド体を電池本体
及び/又は基板に係合させる係合手段と、を備えて構成
された基板一体化電池であって、前記基板の外周縁形状
が前記電池本体の扁平な一側面の形状に合致しているこ
とを特徴とする。
According to the present invention for achieving the above object, one or a plurality of battery main bodies and at least external connection terminals are formed in parallel with the upper surface of the battery main body. A substrate, a connecting member for electrically connecting the substrate and the battery main body, a resin molded body in which the filled and molded resin is fixed to arbitrary surfaces of the battery main body and the substrate to integrate them, and An engaging battery for engaging a resin molded body with a battery body and / or a substrate, wherein the outer peripheral edge of the substrate has a flat one side surface shape. It is characterized by conforming to.

【0021】上記構成の基板一体化電池は、電池本体と
基板とを樹脂モールド体により一体化し、加えて、前記
基板の外周縁形状が前記電池本体の扁平な一側面の形状
に合致しているので、一体化した部位の堅牢性を向上さ
せることができる。
In the substrate-integrated battery having the above structure, the battery main body and the substrate are integrated by the resin mold body, and in addition, the shape of the outer peripheral edge of the substrate matches the shape of one flat side surface of the battery main body. Therefore, the robustness of the integrated portion can be improved.

【0022】また、上記目的を達成するための本発明
は、1又は複数の電池本体と、この電池本体の上面に対
して平行に配設されて少なくとも外部接続用端子が形成
された基板と、この基板と前記電池本体とを電気的に接
続する接続部材と、充填成形された樹脂が電池本体及び
基板それぞれの任意面に固着して両者を一体化した樹脂
モールド体と、この樹脂モールド体を電池本体及び/又
は基板に係合させる係合手段と、を備えて構成された基
板一体化電池に対し、少なくとも前記外部接続用端子を
外部露出させ、基板及び樹脂モールド体を被覆する上部
樹脂成形体と、電池本体の基板配設面の反対面を被覆す
る下部樹脂成形体と、上部樹脂成形体及び下部樹脂成形
体の一部と電池本体の胴部分とを被覆して巻着された巻
着シートとにより外面を被覆して構成され、下部樹脂成
形体があらかじめ成形された樹脂成形板からなり、前記
樹脂成形板が電池本体の基板配設面の反対面全面を被覆
することを特徴する。
Further, according to the present invention for achieving the above object, one or a plurality of battery main bodies, and a substrate which is arranged in parallel with an upper surface of the battery main body and on which at least external connection terminals are formed, A connecting member for electrically connecting the substrate and the battery main body, a resin molded body in which the filled and molded resin is adhered to arbitrary surfaces of the battery main body and the substrate to integrate them, and the resin molded body. An upper resin molding for exposing at least the external connection terminal to the outside and covering the substrate and the resin molded body with respect to the substrate integrated battery configured to include the battery main body and / or the engaging means for engaging with the substrate. A body, a lower resin molded body that covers the surface of the battery main body opposite to the surface on which the substrate is provided, a part of the upper resin molded body and the lower resin molded body, and a body part of the battery body Outside with the wearing sheet The constructed by coating the lower resin molded body is made of preformed resin molded plate, the resin molded plate is characterized by coating the opposite surface entire surface of the substrate arrangement surface of the cell body.

【0023】上記構成の電池パックは、電池本体と基板
とを樹脂モールド体により一体化し、更に少なくとも基
板上の外部接続端子を外部露出させて外装被覆を施した
もので、外装被覆は、少なくとも外部接続端子を外部露
出させて基板及び樹脂モールド体を被覆する上部樹脂成
形体と、電池の基板配設面の反対面を被覆する下部樹脂
成形体とを備えて構成され、加えて、下部樹脂成形体を
あらかじめ成形された樹脂成形板とし、これが電池本体
の基板配設面の反対面全面を被覆することによって、下
部樹脂成形体部分の強度を一層高めることができるの
で、電池パックの堅牢性を向上させることができる。
In the battery pack having the above-mentioned structure, the battery main body and the substrate are integrated by a resin mold body, and at least the external connection terminals on the substrate are exposed to the outside to provide an exterior coating. An upper resin molded body that exposes the connection terminals to the outside and covers the substrate and the resin molded body, and a lower resin molded body that covers the surface of the battery opposite to the substrate mounting surface are formed. By making the body into a pre-molded resin molded plate and covering the entire surface of the battery main body opposite to the substrate mounting surface, the strength of the lower resin molded body can be further increased, thus improving the robustness of the battery pack. Can be improved.

【0024】[0024]

【発明の実施の形態】以下、添付図面を参照して本発明
の実施形態について説明し、本発明の理解に供する。
尚、以下に示す実施形態は本発明を具体化した一例であ
って、本発明の技術的範囲を限定するものではない。
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
The embodiments described below are examples of embodying the present invention and do not limit the technical scope of the present invention.

【0025】図1は、第1の実施形態に係る電池100
a,100bの外観を示すもので、扁平角形のリチウム
イオン二次電池として構成されたものである。電池本体
101はその正極及び負極に接続された端子板(基板)
102と樹脂モールド体103により一体化され、端子
板102の外面上に正極外部接続端子104及び負極外
部接続端子105が形成されている。電池100aは、
端子板102を電池本体101の封口面と平行に配置
し、正極外部接続端子104及び負極外部接続端子10
5を上面に設けた構成である。電池100bは、端子板
102を電池本体101の側面と平行に配置し、正極外
部接続端子104及び負極外部接続端子105を側面端
に設けた構成である。
FIG. 1 shows a battery 100 according to the first embodiment.
2A and 2B show the appearance of a and 100b, and are configured as a flat prismatic lithium ion secondary battery. The battery body 101 is a terminal plate (substrate) connected to its positive and negative electrodes
102 and the resin molded body 103 are integrated, and the positive electrode external connection terminal 104 and the negative electrode external connection terminal 105 are formed on the outer surface of the terminal plate 102. The battery 100a is
The terminal plate 102 is arranged parallel to the sealing surface of the battery body 101, and the positive electrode external connection terminal 104 and the negative electrode external connection terminal 10 are arranged.
5 is provided on the upper surface. The battery 100b has a configuration in which the terminal plate 102 is arranged in parallel with the side surface of the battery body 101, and the positive electrode external connection terminal 104 and the negative electrode external connection terminal 105 are provided at the side surface ends.

【0026】前記電池本体101は、図2に示すよう
に、横断面形状が長円形の有底筒状に形成されたアルミ
ニウム製の電池缶22内に発電要素を収容し、その開口
端は封口板23がレーザー溶接されることによって封口
されている。電池缶22に接合して電池正極となる封口
板23には、その中央に上ガスケット24a及び下ガス
ケット24bにより絶縁して電池負極となるリベット2
5が締結されている。また、封口板23の一部は箔状板
を貼り合わせたクラッド板に形成されており、クラッド
板部分に放出口20aを形成した安全弁20が構成され
ている。また、封口板23の両側には樹脂モールド体1
03を電池本体101に係合する一対の係合部材26が
形成されている。この係合部材26の形成方法は、封口
板23にプレス加工により形成する方法、係合部材26
を封口板23に溶接接合する方法のいずれかを採用する
ことができる。尚、27は電解液注入口を閉じる封栓
で、電池缶22内に電解液を注入した後、電解液注入口
は封栓27によって閉じられ、封栓27は封口板23に
溶接される。
As shown in FIG. 2, the battery body 101 accommodates a power generating element in an aluminum battery can 22 formed in a bottomed cylindrical shape having an oval cross section, and its open end is sealed. The plate 23 is sealed by laser welding. The sealing plate 23, which is joined to the battery can 22 and serves as a battery positive electrode, has a rivet 2 serving as a battery negative electrode, which is insulated at its center by an upper gasket 24a and a lower gasket 24b.
5 has been concluded. Further, a part of the sealing plate 23 is formed as a clad plate obtained by laminating foil-shaped plates, and the safety valve 20 in which the discharge port 20a is formed in the clad plate portion is configured. Further, the resin mold body 1 is provided on both sides of the sealing plate 23.
A pair of engaging members 26 for engaging 03 with the battery main body 101 are formed. The method of forming the engaging member 26 is the method of forming the sealing plate 23 by pressing, and the engaging member 26.
Any of the methods of welding and joining the sealing plate 23 to the sealing plate 23 can be adopted. Reference numeral 27 is a sealing plug that closes the electrolytic solution inlet. After the electrolytic solution is injected into the battery can 22, the electrolytic solution inlet is closed by the sealing plug 27, and the sealing plug 27 is welded to the sealing plate 23.

【0027】上記構成になる電池本体101には、図3
に示すように、リベット25に一方電極板を接合してP
TC素子110が配設され、PTC素子110の他方電
極板は封口板23上に貼着された絶縁シート21上に配
置され、後述する正極接続リード板(接続部材)108
と接合される。PTC素子110上には後述する樹脂の
充填成形時にPTC素子110が熱破壊されないように
断熱シート16は配設される。また、安全弁20の放出
口20aを覆って樹脂シート40が貼着される。
The battery main body 101 having the above-mentioned structure is shown in FIG.
As shown in FIG.
The TC element 110 is arranged, the other electrode plate of the PTC element 110 is arranged on the insulating sheet 21 stuck on the sealing plate 23, and a positive electrode connection lead plate (connection member) 108 described later is provided.
Is joined with. The heat insulating sheet 16 is disposed on the PTC element 110 so that the PTC element 110 is not thermally destroyed during the filling and molding of a resin described later. Further, the resin sheet 40 is attached to cover the discharge port 20a of the safety valve 20.

【0028】また、端子板102は、図4に示すよう
に、外面側となる一方面に正極外部接続端子104及び
負極外部接続端子105が形成され、電池本体101に
対向する内面側となる他方面に電池本体101と接続す
る正極接続ランド106及び負極接続ランド107が形
成されている。前記正極外部接続端子104及び負極外
部接続端子105は板面上に貼り付けられた銅箔をエッ
チングして形成することができるが、板面に端子部材を
取り付けて構成することもできる。電池100bのよう
に側面に正極外部接続端子104及び負極外部接続端子
105を設けた構成は、機器側の接続端子と摺動接触さ
せるのに好適な構造なので、板状の端子部材を端子板1
02に取り付けることが望ましい。尚、端子板102の
一方面と他方面との間は図示しないスルーホール及び回
路パターンにより要所が接続されている。
As shown in FIG. 4, the terminal plate 102 has a positive electrode external connection terminal 104 and a negative electrode external connection terminal 105 formed on one surface which is the outer surface side, and the other is the inner surface side which faces the battery body 101. A positive electrode connection land 106 and a negative electrode connection land 107 that are connected to the battery body 101 are formed on the direction. The positive electrode external connection terminal 104 and the negative electrode external connection terminal 105 can be formed by etching a copper foil attached on the plate surface, but can also be configured by attaching a terminal member to the plate surface. Since the configuration in which the positive electrode external connection terminal 104 and the negative electrode external connection terminal 105 are provided on the side surface like the battery 100b is suitable for sliding contact with the connection terminal on the device side, a plate-shaped terminal member is used as the terminal board 1.
It is desirable to attach it to 02. In addition, important points are connected between one surface and the other surface of the terminal board 102 by through holes and circuit patterns (not shown).

【0029】前記正極接続ランド106及び負極接続ラ
ンド107には、図4(c)に示すように、それぞれ正
極接続リード板108、負極接続リード板(接続部材)
109の一端が半田付けにより接合される。この端子板
102は、図5に示すように、正極接続リード板108
の他端を封口板23に接合し、負極接続リード板109
の他端を前記PTC素子110の他方電極板に接合して
電池本体101に接続される。図1(a)に示した電池
100aに構成する場合には、端子板102は図5
(a)に示すように封口板23と平行になるように正極
接続リード板108及び負極接続リード板109を折り
曲げる。図1(b)に示した電池100bに構成する場
合には、図5(a)に示すように封口板23に対して直
交した状態のままでよい。
As shown in FIG. 4C, the positive electrode connecting land 106 and the negative electrode connecting land 107 respectively have a positive electrode connecting lead plate 108 and a negative electrode connecting lead plate (connecting member).
One end of 109 is joined by soldering. As shown in FIG. 5, this terminal board 102 has a positive electrode connection lead plate 108.
The other end of the negative electrode connection lead plate 109 is joined to the sealing plate 23.
The other end is joined to the other electrode plate of the PTC element 110 and connected to the battery body 101. When the battery 100a shown in FIG.
As shown in (a), the positive electrode connecting lead plate 108 and the negative electrode connecting lead plate 109 are bent so as to be parallel to the sealing plate 23. When the battery 100b shown in FIG. 1B is constructed, the battery 100b may remain in a state orthogonal to the sealing plate 23 as shown in FIG. 5A.

【0030】上記のように電池本体101と端子板10
2とを接続した後、図6に示すように、電池本体101
と端子板102との間に樹脂を充填成形して電池本体1
01と端子板102とを一体化する。電池本体101は
その表面の大部分が金属体であり、充填成形された樹脂
モールド体103と接合し難いが、封口板23上に取り
付けられた係合部材26が樹脂モールド体103に包み
込まれ、そのアンダーカット部分で樹脂モールド体10
3に係合するので、樹脂モールド体103に対する投錨
効果が得られ、樹脂モールド体103は電池本体101
に接合した状態となる。端子板102は正極接続リード
板108や負極接続リード板109が樹脂モールド体1
03内に包み込まれて樹脂モールド体103と係合する
が、更に係合性を向上させるには、リベット状の突起を
設けると、係合部材26と同様の効果が得られる。充填
成形される樹脂としては、熱可塑性ポリアミド樹脂が用
いられる。この樹脂は、接着性、電気絶縁性、耐薬品性
に優れており、さらに190℃〜230度の範囲で成型
可能なことから電池本体101、PTC素子110等へ
の熱影響を抑制することができる。
As described above, the battery body 101 and the terminal plate 10
2 is connected to the battery main body 101, as shown in FIG.
The battery main body 1 is formed by filling and molding resin between the terminal plate 102 and the terminal plate 102.
01 and the terminal board 102 are integrated. Most of the surface of the battery main body 101 is a metal body, and it is difficult to join the resin molded body 103 that has been filled and molded, but the engagement member 26 mounted on the sealing plate 23 is wrapped in the resin molded body 103, The resin molded body 10 in the undercut portion
3, the anchor effect for the resin mold body 103 is obtained, and the resin mold body 103 is connected to the battery main body 101.
It will be in a state of being joined to. In the terminal plate 102, the positive electrode connecting lead plate 108 and the negative electrode connecting lead plate 109 are the resin molded body 1.
Although it is wrapped in 03 and engages with the resin mold body 103, in order to further improve the engaging property, a rivet-shaped projection is provided, and the same effect as the engaging member 26 can be obtained. A thermoplastic polyamide resin is used as the resin to be filled and molded. This resin has excellent adhesiveness, electrical insulation, chemical resistance, and can be molded in the range of 190 ° C. to 230 ° C., so that it can suppress the thermal influence on the battery body 101, the PTC element 110, and the like. it can.

【0031】なお、図5に示すように、端子板102は
電池本体101の両側面の円弧に合致した円弧コーナー
に切り欠きを設けた形状となっており、切り欠きを除く
外周縁は電池本体101の形状に略一致している。ま
た、樹脂モールド体103は、図1(a)に示すよう
に、端子板102の形状に一致して電池本体101の両
側面の円弧に合致して円弧コーナーに角型の切り欠きを
設けた形状となっており、端子板102の円弧コーナー
部が樹脂モールド体103から露出して形成される。
As shown in FIG. 5, the terminal plate 102 has a shape in which notches are provided at arc corners that match the arcs on both sides of the battery body 101, and the outer peripheral edge excluding the notches is the battery body. The shape is substantially the same as that of 101. Further, as shown in FIG. 1A, the resin mold body 103 has rectangular cutouts at the arc corners that conform to the shape of the terminal plate 102 and the arcs on both side surfaces of the battery body 101. The terminal plate 102 has a circular shape and is formed so that the arcuate corner portion of the terminal plate 102 is exposed from the resin mold body 103.

【0032】また、端子板102及び電池本体101の
樹脂モールド体103と接する面に樹脂及び金属と接着
性のよい接着剤を塗布することによって、樹脂モールド
体103と電池本体101及び端子板102との接合性
を向上させることもできる。この接着剤としては、ポリ
アミド樹脂のホットメルト接着剤や、エポキシ樹脂系、
シリコン変成樹脂系の接着剤が用いられる。
Further, by applying an adhesive having a good adhesive property to the resin and the metal to the surfaces of the terminal plate 102 and the battery body 101 which are in contact with the resin molded body 103, the resin mold body 103 and the battery body 101 and the terminal plate 102 are connected to each other. It is also possible to improve the bondability of. As this adhesive, a hot-melt adhesive of polyamide resin, an epoxy resin-based adhesive,
A silicone modified resin adhesive is used.

【0033】上記構成になる電池100a,100b
は、正極外部接続端子104と負極外部接続端子105
との間が何らかの原因によって外部短絡された場合に、
短絡による過大な短絡電流によってPTC素子110が
温度上昇し、その温度が設定されたトリップ温度を越え
たとき、通常温度状態では僅少な抵抗値であるPTC素
子110はトリップ現象により抵抗値を急増させるの
で、短絡電流は一気に規制されて電池本体101が外部
短絡により温度上昇して破裂等の事態に陥ることを防止
する。PTC素子110は電池本体101が高温環境に
曝されたときにも温度上昇によってトリップするので、
高温環境で電池本体101が使用状態となることを防止
する。即ち、電池100a,100bはPTC素子11
0の内蔵した安全機能を備えたものとなる。
Batteries 100a and 100b having the above structure
Is a positive electrode external connection terminal 104 and a negative electrode external connection terminal 105.
If an external short circuit occurs between the
When the temperature of the PTC element 110 rises due to an excessive short-circuit current due to a short circuit and the temperature exceeds a set trip temperature, the PTC element 110, which has a small resistance value in a normal temperature state, rapidly increases the resistance value due to a trip phenomenon. Therefore, the short-circuit current is regulated at a stretch to prevent the battery main body 101 from rising in temperature due to an external short circuit and falling into a situation such as a rupture. Since the PTC element 110 trips due to the temperature rise even when the battery body 101 is exposed to a high temperature environment,
The battery body 101 is prevented from being used in a high temperature environment. That is, the batteries 100a and 100b are the PTC element 11
It will be equipped with 0 built-in safety function.

【0034】また、電池100a,100bが異常温度
にまで上昇して電池本体101内にガスが発生すると、
電池本体101が破裂に至る恐れがあるが、発生したガ
スの圧力が安全弁20を作動圧力に達すると、安全弁2
0はその箔状板部分が破断して異常上昇した内圧を外部
に放出する。安全弁20の放出口20a上は樹脂シート
40により塞がれ、更に樹脂モールド体103で覆われ
ているので、放出口20aから噴出したガスは樹脂シー
ト40及び樹脂モールド体103と電池本体101との
界面から外部に放出される。従って、電池本体101が
温度上昇によって破裂に至ることは防止され、前記PT
C素子110と共に二重の安全機能が設けられた電池1
00a,100bに構成することができる。
When the batteries 100a and 100b rise to an abnormal temperature and gas is generated in the battery body 101,
The battery main body 101 may burst, but when the pressure of the generated gas reaches the operating pressure of the safety valve 20, the safety valve 2
In the case of 0, the foil-like plate portion is broken and the abnormally increased internal pressure is released to the outside. Since the discharge port 20a of the safety valve 20 is covered with the resin sheet 40 and further covered with the resin mold body 103, the gas ejected from the discharge port 20a is generated between the resin sheet 40 and the resin mold body 103 and the battery body 101. It is released from the interface to the outside. Therefore, it is possible to prevent the battery main body 101 from rupturing due to the temperature rise.
Battery 1 with double safety function together with C element 110
00a, 100b.

【0035】上記にように構成された電池100a、1
00bは、更に外装被覆を設けることによって外観及び
強度の向上を図ることができる。外装被覆は、図6
(b)に示すように、正極外部接続端子104及び負極
外部接続端子105上に開口部を形成して端子板102
上を被覆し、樹脂モールド体103の側周面を被覆する
二次モールド体120と、電池本体101の側周面に巻
着した巻着シート121とによるもので、図7に示すよ
うな外観の電池100c,100dに仕上げることがで
きる。巻着シート121は、ポリプロピレン樹脂、ポリ
エチレンテレフタレート樹脂、ポリカーボネート樹脂、
及びこれらを含む樹脂等が用いられ、この樹脂に粘着層
を付与することで、電池100a、100bに貼付され
るものである。また、前記の巻着シート121に所望の
機能を有するフィルムを用いることで、電池としての機
能を高める効果を奏する。例えば、前記の樹脂に代え
て、ガラス繊維等を分散させた繊維強化型フィルムを用
いることで、電池の強度を高めるという効果が得られ
る。また、アクリルプロポリマー中に高濃度でニッケル
粉、カーボニル鉄粉を分散させることで巻着シート12
1にEMI(電磁妨害)シールド層を付与することもで
きる。このシールド層を形成した巻着シート121は、
端子板102に実装される電子部品への電磁妨害に加
え、この電池が装着される機器への電磁妨害を抑制する
効果を奏する。また、巻着シート121に色彩、模様等
の装飾を施すこともできる。特に、電池が外部に露出す
る構成を有する機器に適用される場合には、機器側の色
彩、色調に応じた巻着シート121が用いられる。
Batteries 100a, 1 constructed as described above
00b can be improved in appearance and strength by further providing an exterior coating. The exterior coating is shown in FIG.
As shown in (b), the terminal plate 102 is formed by forming openings on the positive electrode external connection terminal 104 and the negative electrode external connection terminal 105.
The secondary mold body 120 that covers the upper surface and covers the side peripheral surface of the resin mold body 103 and the winding sheet 121 that is wound around the side peripheral surface of the battery body 101 have an appearance as shown in FIG. The batteries 100c and 100d can be finished. The winding sheet 121 is made of polypropylene resin, polyethylene terephthalate resin, polycarbonate resin,
Also, a resin or the like containing these is used, and by applying an adhesive layer to this resin, the resin is attached to the batteries 100a and 100b. In addition, by using a film having a desired function for the winding sheet 121, it is possible to enhance the function as a battery. For example, the effect of increasing the strength of the battery can be obtained by using a fiber reinforced film in which glass fibers or the like are dispersed instead of the resin. Further, by winding nickel powder and carbonyl iron powder in high concentration in the acrylic propolymer, the wound sheet 12
1 may be provided with an EMI (electromagnetic interference) shield layer. The winding sheet 121 having this shield layer is
In addition to the electromagnetic interference to the electronic parts mounted on the terminal board 102, the electromagnetic interference to the equipment in which this battery is mounted is suppressed. Further, the winding sheet 121 can be decorated with colors, patterns and the like. In particular, when applied to a device having a structure in which a battery is exposed to the outside, a wrapping sheet 121 according to the color and tone of the device is used.

【0036】次いで、第2の実施形態に係る電池パック
について説明する。本実施形態は、扁平角形のリチウム
イオン二次電池を用いて携帯電話機に適用する電池パッ
クを構成した例を示すものである。携帯電話機に適用す
る電池パックは、小型、軽量、薄型に加えて高機能化に
対応する高エネルギー密度、携帯機器として避けられな
い落下等による衝撃に耐え得る機械的強度、分解され難
い構造、短絡や過充電、高温等から二次電池を保護する
安全機能などを備えることが要求されており、以下に示
す電池パックはこれらの要件を満たすように構成されて
いる。
Next, the battery pack according to the second embodiment will be described. This embodiment shows an example in which a flat-type lithium-ion secondary battery is used to configure a battery pack applied to a mobile phone. The battery pack applied to mobile phones is small, lightweight, thin, and has a high energy density that supports high functionality, mechanical strength that can withstand impacts such as drops that are inevitable as mobile devices, a structure that is difficult to disassemble, and a short circuit. It is required to have a safety function for protecting the secondary battery from overcharging, high temperature, etc., and the battery pack shown below is configured to meet these requirements.

【0037】図8は、実施形態に係る電池パック1の外
観を示すもので、一方端面に正極端子及び負極端子、温
度検出端子からなる外部接続端子6を外部露出させ、後
述するテスト端子30上に水没シール9を貼着し、扁平
な非対称形状に構成されている。図9は、この電池パッ
ク1を分解して各構成要素を示したもので、以下に主な
構成要素の詳細と組み立て手順について説明する。
FIG. 8 shows the external appearance of the battery pack 1 according to the embodiment. The external connection terminal 6 including a positive electrode terminal, a negative electrode terminal, and a temperature detection terminal is externally exposed on one end surface of the test terminal 30 to be described later. A submerged seal 9 is attached to the surface of the container to form a flat asymmetric shape. FIG. 9 shows the components of the battery pack 1 disassembled, and the details of the main components and the assembly procedure will be described below.

【0038】電池パック1に用いる二次電池2は、第1
の実施形態に示した電池に適用した電池本体101(図
2参照)と同一の構成であり、その説明は省略する。
The secondary battery 2 used in the battery pack 1 is the first
The battery main body 101 has the same configuration as the battery main body 101 (see FIG. 2) applied to the battery shown in the embodiment, and the description thereof will be omitted.

【0039】二次電池2には、図10に示すように、リ
ベット25に温度ヒュ−ズ10の一方接続片10aが溶
接される。温度ヒューズ10の上面には破線で示すよう
に断熱シート16が貼着され、後述する樹脂充填時に温
度ヒューズ10が溶断することを防止している。温度ヒ
ューズ10の他方接続片10bは封口板23上に貼着さ
れた絶縁シート21上に配置され、後述する負極リード
板5の一端にスポット溶接により接合される。また、温
度ヒューズ10は熱伝導性の接着剤によって封口板23
に接着され、二次電池2と熱結合した状態に配設され
る。尚、ここでは温度ヒューズ10を適用しているが、
前述の電池100a,100bのようにPTC素子11
0を適用することもできる。
In the secondary battery 2, as shown in FIG. 10, one connecting piece 10a of the temperature fuse 10 is welded to the rivet 25. A heat insulating sheet 16 is adhered to the upper surface of the thermal fuse 10 as shown by a broken line to prevent the thermal fuse 10 from being blown out at the time of resin filling described later. The other connecting piece 10b of the thermal fuse 10 is arranged on the insulating sheet 21 stuck on the sealing plate 23, and is joined to one end of a negative electrode lead plate 5 described later by spot welding. In addition, the thermal fuse 10 has a sealing plate 23 made of a heat conductive adhesive.
And is disposed in a state of being thermally coupled to the secondary battery 2. Although the thermal fuse 10 is applied here,
Like the batteries 100a and 100b described above, the PTC element 11
It is also possible to apply 0.

【0040】図11に示すように、二次電池2を過充電
や過放電、過電流から保護する保護回路を構成した回路
基板3は、その外面側となる一方面に前記外部接続端子
6やテスト端子30が形成され、二次電池2側となる他
方面に集積回路部品をはじめとする電子部品31が実装
され、両側に二次電池2に接続するための正極半田付け
ランド32、負極半田付けランド33が形成されてい
る。前記正極半田付けランド32には正極リード板(接
続部材)4の一端が半田付けされ、負極半田付けランド
33には負極リード板(接続部材)5の一端が半田付け
される。尚、各図において回路基板3に形成されている
回路パターンやスルーホール等の表示は省略している。
As shown in FIG. 11, the circuit board 3 constituting a protection circuit for protecting the secondary battery 2 from overcharge, overdischarge, and overcurrent has the external connection terminals 6 and the external connection terminals 6 on one surface which is the outer surface side. A test terminal 30 is formed, an electronic component 31 such as an integrated circuit component is mounted on the other surface of the secondary battery 2 side, and positive electrode soldering lands 32 for connecting to the secondary battery 2 and negative electrode solder are provided on both sides. The attachment land 33 is formed. One end of the positive electrode lead plate (connection member) 4 is soldered to the positive electrode solder land 32, and one end of the negative electrode lead plate (connection member) 5 is soldered to the negative electrode solder land 33. It should be noted that, in each drawing, the display of circuit patterns, through holes, etc. formed on the circuit board 3 is omitted.

【0041】この接続加工を終えた回路基板3は、二次
電池2に対し、正極リード板4の他端は封口板23の板
面に、負極リード板5の他端は前記温度ヒューズ10の
他方接続片10b上に、それぞれスポット溶接される。
この接続状態では、回路基板3は封口板23の板面に対
して直交する方向になっているので、図11(b)に示
すように、正極及び負極の各リード板4、5を折り曲
げ、回路基板3の板面と封口板23の板面との間に間隙
を設け、略並行になる状態に整形する。このように二次
電池2に回路基板3を接続して、図12(a)に示すよ
うな樹脂充填対象物7が形成される。
With respect to the secondary battery 2, the circuit board 3 that has completed this connection process has the other end of the positive electrode lead plate 4 on the plate surface of the sealing plate 23 and the other end of the negative electrode lead plate 5 of the thermal fuse 10. Spot welding is performed on the other connection piece 10b.
In this connection state, since the circuit board 3 is in a direction orthogonal to the plate surface of the sealing plate 23, the lead plates 4 and 5 for the positive electrode and the negative electrode are bent as shown in FIG. A space is provided between the plate surface of the circuit board 3 and the plate surface of the sealing plate 23, and the circuit board 3 is shaped in a substantially parallel state. In this way, the circuit board 3 is connected to the secondary battery 2 to form the resin filling target 7 as shown in FIG.

【0042】上記樹脂充填対象物7の二次電池2と回路
基板3との間の間隙に樹脂を充填成形し、一次モールド
体(第1の枠体)11を形成して二次電池2と回路基板
3とを一体化する。一次モールド体11の形成は、一次
モールド金型内に樹脂充填対象物7を収容して、図13
に示すように、二次電池2と回路基板3との間に樹脂を
充填成形する。
A resin is filled in the gap between the secondary battery 2 and the circuit board 3 of the resin-filled object 7 to form a primary mold body (first frame) 11 to form a secondary battery 2. The circuit board 3 is integrated. The primary mold body 11 is formed by accommodating the resin-filled object 7 in the primary mold die as shown in FIG.
As shown in FIG. 3, resin is filled between the secondary battery 2 and the circuit board 3 and molded.

【0043】図14に示すように、一次モールド金型の
下型36は、可動部41が付勢手段45によって固定部
42側に移動可能に構成され、可動部41には真空吸着
部43が設けられている。前記可動部41を後退させた
状態にして下型36内に樹脂充填対象物7を配置し、可
動部41を前進させると二次電池2はその底面が固定部
42の内壁面に押し付けられて位置決めされる。一方、
回路基板3は真空吸着部43からの真空吸引により真空
吸着部43の壁面に密着して位置決めされる。
As shown in FIG. 14, in the lower die 36 of the primary molding die, the movable portion 41 is movable to the fixed portion 42 side by the urging means 45, and the movable portion 41 has the vacuum suction portion 43. It is provided. When the resin-filled object 7 is placed in the lower mold 36 with the movable portion 41 retracted and the movable portion 41 is moved forward, the bottom surface of the secondary battery 2 is pressed against the inner wall surface of the fixed portion 42. Positioned. on the other hand,
The circuit board 3 is positioned in close contact with the wall surface of the vacuum suction portion 43 by vacuum suction from the vacuum suction portion 43.

【0044】前記二次電池2の底面から回路基板3の外
部接続端子形成面までの高さ寸法Hは、二次電池2の高
さ寸法hのバラツキ及び回路基板3が一定位置に固定さ
れていないことが原因で変動するが、回路基板3は真空
吸引によって一定位置に固定され、可動部41は二次電
池2の高さ寸法hに応じて、その前進量が変化するの
で、下型36内に位置決めされた二次電池2と回路基板
3とは、それらの間の間隙の高さ寸法Gの変化により、
二次電池2の底面から回路基板3の外部接続端子形成面
までの高さ寸法Hは一定の状態になる。
The height dimension H from the bottom surface of the secondary battery 2 to the external connection terminal forming surface of the circuit board 3 is such that the height dimension h of the secondary battery 2 varies and the circuit board 3 is fixed at a fixed position. Although it fluctuates due to the absence, the circuit board 3 is fixed at a fixed position by vacuum suction, and the moving amount of the movable portion 41 changes in accordance with the height dimension h of the secondary battery 2. The secondary battery 2 and the circuit board 3 positioned in the inside are changed by the change in the height dimension G of the gap between them.
The height dimension H from the bottom surface of the secondary battery 2 to the external connection terminal formation surface of the circuit board 3 becomes constant.

【0045】上記のように二次電池2と回路基板3とを
位置決めした下型36上を上型で閉じ、二次電池2と回
路基板3との間の間隙に樹脂を注入する。注入された樹
脂は、図13に示すように、回路基板3に実装された電
子部品31や正極及び負極の各リード板4、5の周囲に
も回り込んで回路基板3に接合し、二次電池2の封口板
23上に形成された係合突起26のアンダーカット部分
にも回り込んで封口板23に接合する。樹脂は電子部品
31や二次電池2、あるいは温度ヒューズ10に悪影響
を与えない程度の温度で流動化し、温度低下により固化
する熱可塑性ポリアミド樹脂が好適である。この樹脂の
一例としては、TRL社製熱可塑性ポリアミド樹脂サー
メルト817が用いられる。サーメルト817は、19
0〜210℃の成型が可能であり、また固化時間が5秒
と短いことから、電池、電子部品への熱影響を排除でき
る特徴を有する。
The lower mold 36 on which the secondary battery 2 and the circuit board 3 are positioned as described above is closed by the upper mold, and the resin is injected into the gap between the secondary battery 2 and the circuit board 3. As shown in FIG. 13, the injected resin also wraps around the electronic components 31 mounted on the circuit board 3 and the lead plates 4 and 5 for the positive and negative electrodes to bond to the circuit board 3, The undercut portion of the engaging projection 26 formed on the sealing plate 23 of the battery 2 is also wrapped around and joined to the sealing plate 23. The resin is preferably a thermoplastic polyamide resin that fluidizes at a temperature that does not adversely affect the electronic component 31, the secondary battery 2, or the thermal fuse 10 and solidifies when the temperature decreases. As an example of this resin, a thermoplastic polyamide resin cermelt 817 manufactured by TRL is used. Thermert 817 is 19
Since it can be molded at 0 to 210 ° C and the solidification time is as short as 5 seconds, it has a feature that heat influence on batteries and electronic parts can be eliminated.

【0046】樹脂の温度が比較的低くても200℃を越
える温度であるため、溶断温度が例えば104℃に設定
されている温度ヒューズ10に触れると、温度ヒューズ
10は溶断して電池パック1自体の機能を停止させてし
まうことになる。その対策は、温度ヒューズ10上に断
熱シート16を貼着して、樹脂の熱が温度ヒューズ10
に伝熱することを抑えている。
Since the temperature of the resin exceeds 200 ° C. even if the temperature of the resin is relatively low, when the thermal fuse 10 whose melting temperature is set to 104 ° C. is touched, the thermal fuse 10 melts and the battery pack 1 itself. The function of will be stopped. The countermeasure is to attach the heat insulating sheet 16 on the thermal fuse 10 so that the heat of the resin is
It suppresses heat transfer to.

【0047】充填された樹脂を固化させると、図12
(b)に示すような中間完成品8として下型36から取
り出すことができる。この中間完成品8の周囲に外装被
覆を施すことによって電池パック1に形成することがで
きる。ここでは、外装被覆は、二次モールディングと巻
着シートの貼着によって施される。二次モールディング
を実施する前に、二次電池2の底面にインシュレータ1
4を貼着する。
When the filled resin is solidified, FIG.
The intermediate finished product 8 as shown in (b) can be taken out from the lower mold 36. The intermediate finished product 8 can be formed into the battery pack 1 by applying an outer coating on the periphery thereof. Here, the exterior coating is applied by attaching a secondary molding and a wrapping sheet. Before performing the secondary molding, the insulator 1 is attached to the bottom surface of the secondary battery 2.
Stick 4 on.

【0048】二次モールディングは、図15に示すよう
に、二次モールド金型46に前記中間完成品8を配置し
て、中間完成品8の所要部位に樹脂を成形する。二次モ
ールド金型46の下型47には中間完成品8を収容する
凹部50が形成されており、凹部50の一側壁面には内
方に進出付勢される3個の外部接続端子用突起51とテ
スト端子用突起52とが設けられ、対向する他側壁面に
は内方に進出付勢される底面用突起54が設けられてい
る。凹部50内に中間完成品8を配置し、前記外部接続
端子用突起51及びテスト端子用突起52、底面用突起
54を進出させると、外部接続端子用突起51は回路基
板3上に形成された3か所の外部接続端子6に圧接し、
テスト端子用突起52はテスト端子30に圧接し、底面
用突起54は二次電池2に底面に貼着されたインシュレ
ータ14に圧接する。
In the secondary molding, as shown in FIG. 15, the intermediate finished product 8 is placed in the secondary molding die 46, and a resin is molded at a required portion of the intermediate finished product 8. The lower mold 47 of the secondary molding die 46 is formed with a recess 50 for accommodating the intermediate finished product 8, and one side wall surface of the recess 50 is for three external connection terminals that are biased inward. A protrusion 51 and a test terminal protrusion 52 are provided, and a bottom face protrusion 54 that is urged to move inward is provided on the other side wall surface facing each other. When the intermediate finished product 8 is placed in the recess 50 and the external connection terminal projection 51, the test terminal projection 52, and the bottom surface projection 54 are advanced, the external connection terminal projection 51 is formed on the circuit board 3. Press contact with the external connection terminals 6 at 3 places,
The test terminal projection 52 is pressed against the test terminal 30, and the bottom projection 54 is pressed against the insulator 14 attached to the bottom surface of the secondary battery 2.

【0049】この状態の下型47上を上型48で閉じ、
上型48に設けられたゲート53から二次モールド金型
46内に樹脂を充填する。樹脂は4か所から二次モール
ド金型46内に射出され、図16に示すように、中間完
成品8の外部接続端子6及びテスト端子30を外部露出
させ、インシュレータ14の中央部を外部露出させ、一
次モールド体11及び回路基板3を被覆し、二次電池2
の封口板23上に固着した上部成形部17を形成すると
共に、二次電池2の底面にインシュレータ14の周囲を
包み込んで所定厚さに固着した下部成形部18を形成
し、更に前記上部成形部17と下部成形部18とを二次
電池の側面コーナーで連結する連結成形部19が形成さ
れる。
The upper mold 48 is closed on the lower mold 47 in this state,
Resin is filled into the secondary molding die 46 from the gate 53 provided on the upper die 48. The resin is injected into the secondary molding die 46 from four places, and as shown in FIG. 16, the external connection terminals 6 and the test terminals 30 of the intermediate finished product 8 are exposed to the outside, and the central portion of the insulator 14 is exposed to the outside. Then, the primary mold body 11 and the circuit board 3 are covered, and the secondary battery 2
An upper molding portion 17 fixedly formed on the sealing plate 23 is formed, and a lower molding portion 18 wrapping around the insulator 14 and fixed to a predetermined thickness is formed on the bottom surface of the secondary battery 2, and the upper molding portion is further formed. A connection molding portion 19 is formed that connects the lower molding portion 17 and the lower molding portion 18 at a side surface corner of the secondary battery.

【0050】一次モールディングと二次モールディング
において、それぞれ選択される樹脂の種類は同一であっ
ても異なるものであってもよい。樹脂の種類が同一の場
合、樹脂同士の密着度が高く、モールド部分の機械的強
度を高めることができる。また、樹脂の種類をが異なる
場合、各モールディング工程に要求される特性に応じた
樹脂を選択できる。例えば、一次モールディングは樹脂
による回路基板3の絶縁被覆、二次電池2との一体化を
主目的としており、回路基板3、温度ヒューズ10への
熱影響を考慮すると、低温成型が可能であり、且つ絶縁
性、金属部分との密着性に富んだ樹脂が選択されるが、
二次モールディングは、電池パックの外装を兼ねること
から、機械的強度に富み、且つ高い表面性状が求められ
る。二次モールディングの樹脂は、溶融状態にある樹脂
が熱影響の顕著になる構成部材(回路基板3上の電子部
品31、温度ヒューズ10)に直接接することがないの
で、一次モールディングの樹脂に比べて高温成形が要求
される樹脂(例えば、ABS樹脂等の樹脂材料)であっ
ても適用が可能である。
The types of resin selected in the primary molding and the secondary molding may be the same or different. When the types of resins are the same, the degree of adhesion between the resins is high, and the mechanical strength of the mold part can be increased. When different types of resin are used, the resin can be selected according to the characteristics required in each molding process. For example, the primary molding is mainly intended to insulate the circuit board 3 with resin and to integrate it with the secondary battery 2. Considering the heat influence on the circuit board 3 and the thermal fuse 10, low temperature molding is possible, In addition, a resin with excellent insulation and adhesion to metal parts is selected,
Since the secondary molding also serves as the exterior of the battery pack, it is required to have high mechanical strength and high surface properties. Since the resin in the secondary molding does not come into direct contact with the components (the electronic components 31 on the circuit board 3 and the thermal fuse 10) in which the resin in the molten state is significantly affected by heat, the resin in the secondary molding is more likely than the resin in the primary molding. The present invention can also be applied to resins that require high temperature molding (for example, resin materials such as ABS resin).

【0051】但し、異なる樹脂材料を選択した場合、樹
脂同士の密着性、機械的強度、材料の化学的な安定性等
を考慮する必要がある。また、二次モールディングに使
用する樹脂の色調は、一次モールディングで使用する樹
脂の色調と同程度、あるいは濃色にするのが好ましい。
これは二次モールディングに淡色樹脂を使用した場合、
一次モールディング樹脂の色調が透過し、電池パックの
美観を損ねてしまうためであり、同様の理由により、回
路基板3及びそれに塗布されたレジストの色彩に対して
も二次モールディング樹脂の色彩は同程度、あるいは濃
色にするのが好ましい。
However, when different resin materials are selected, it is necessary to consider the adhesion between the resins, the mechanical strength, the chemical stability of the materials, and the like. Further, it is preferable that the color tone of the resin used for the secondary molding be substantially the same as or darker than the color tone of the resin used for the primary molding.
This is when using a light color resin for the secondary molding,
This is because the color tone of the primary molding resin is transmitted, and the appearance of the battery pack is impaired. For the same reason, the color of the secondary molding resin is similar to that of the circuit board 3 and the resist applied to the circuit board 3. Or, it is preferable that the color is dark.

【0052】前記連結成形部19は、図17に示すよう
に、横断面形状が長円形の二次電池2の円弧側面の一方
側90度部位が直角に形成されるように樹脂が成形され
る。前記上部成形部17及び下部成形部18、連結成形
部19によって、図12に示した二次モールド体(第2
の枠体)12が形成される。
As shown in FIG. 17, the connection molding portion 19 is formed of resin so that a 90 ° portion on one side of the arc side surface of the secondary battery 2 having an oval cross section is formed at a right angle. . By the upper molding part 17, the lower molding part 18, and the connection molding part 19, the secondary molding body shown in FIG.
Frame body 12 is formed.

【0053】図16に示すように、前記上部成形部17
の周面の二次電池寄りには段差部38が形成されてお
り、これを貼着位置決め線として、二次電池2の側周面
を巻回して巻着シート13が巻着される。この後、テス
ト端子30を用いて動作状態が検査され、検査合格品に
はテスト端子30周囲の凹部内に水没シール9が貼着さ
れ、図8に示したような電池パック1に形成される。
As shown in FIG. 16, the upper molding part 17 is formed.
A stepped portion 38 is formed on the peripheral surface of the secondary battery near the secondary battery, and the winding sheet 13 is wound around the side peripheral surface of the secondary battery 2 using this as a sticking positioning line. After that, the operation state is inspected by using the test terminal 30, and the submerged seal 9 is attached in the recessed portion around the test terminal 30 to the product that passed the inspection, and the battery pack 1 as shown in FIG. 8 is formed. .

【0054】このように形成された電池パック1は、扁
平な一方面の両肩部分が二次電池2の両側面の円弧が表
面に現れる円弧コーナーに形成され、他方面の両肩部分
が連結成形部19によって角形コーナーに形成されるの
で、外部接続端子6が非対称位置に形成されていること
と相まって機器への逆装填が防止できる。また、円弧コ
ーナーは機器ケースの角部のアール形状に対応し、無駄
な空間が形成されることなく機器への収納が可能とな
る。
In the battery pack 1 thus formed, the flat shoulders on one side are formed at arc corners where the arcs on both sides of the secondary battery 2 appear on the surface, and the shoulders on the other side are connected. Since the molded portion 19 is formed in a rectangular corner, the external connection terminal 6 is formed in an asymmetrical position, and therefore the reverse loading to the device can be prevented. Further, the arcuate corner corresponds to the rounded shape of the corner of the device case, so that the device can be stored in the device without forming a useless space.

【0055】上記構成における二次モールド体12の構
成は、上部成形部17のみを二次モールディングとして
回路基板3及び一次モールド体11上に形成し、二次電
池2の底面には下部成形部18と同一形状に成形したイ
ンシュレータ14(ABS樹脂、ABS+PC樹脂、P
C樹脂の成型品)を貼着し、前記連結成形部19は設け
ない構造で、二次電池2の側周面と上部成形部17及び
インシュレータ14の端部を被覆して巻着シート13を
巻着することもできる。二次モールディングにより二次
モールド体12を成形する場合、二次モールディング
は、全体をモールドする必要がないため、形成領域のみ
を金型に入れて成形することができる。従って、二次電
池2全体を金型内に配置する必要がないため、電池への
熱影響を最少にする共に、金型の小型化を実現でき、製
造コストの削減の面でも効果的である。なお、インシュ
レータ14は二次電池2の底面の絶縁する役目をはたす
こというまでもないが、二次電池底面は樹脂モールド体
でなく、別成形品のインシュレータの構成にすることに
よって、電池の底面部の強度向上を図ることができる。
In the structure of the secondary molded body 12 in the above structure, only the upper molding part 17 is formed on the circuit board 3 and the primary molding body 11 as the secondary molding, and the lower molding part 18 is formed on the bottom surface of the secondary battery 2. Insulator 14 (ABS resin, ABS + PC resin, P
(C resin molded product) is affixed, and the connection molding portion 19 is not provided, and the winding sheet 13 is covered by covering the side peripheral surface of the secondary battery 2, the upper molding portion 17 and the end portion of the insulator 14. It can also be wrapped around. When the secondary molding body 12 is molded by the secondary molding, it is not necessary to mold the whole of the secondary molding, and therefore only the forming region can be put into the mold for molding. Therefore, since it is not necessary to dispose the entire secondary battery 2 in the mold, it is possible to minimize the heat effect on the battery, realize the downsizing of the mold, and effectively reduce the manufacturing cost. . Needless to say, the insulator 14 serves to insulate the bottom surface of the secondary battery 2, but the bottom surface of the secondary battery is not a resin molded body, but an insulator that is a separate molded product is used to form the battery. The strength of the bottom portion can be improved.

【0056】また、上部成形部17と同一の外観形状に
二次モールド体12を予め樹脂成形により形成し、これ
を回路基板3上に被せて1次モールド体11を覆って貼
着し、二次電池2の底面には前述のインシュレータ14
aを貼着し、それらの端部と二次電池2の側周面を被覆
して巻着シート13を巻着するように構成することもで
きる。
Further, the secondary molded body 12 is formed in advance by resin molding so as to have the same external shape as that of the upper molding portion 17, and the secondary molded body 12 is covered on the circuit board 3 to be attached so as to cover the primary molded body 11. On the bottom surface of the secondary battery 2, the insulator 14 described above is provided.
It is also possible to attach a, and to cover the end portions and the side peripheral surface of the secondary battery 2 and wind the winding sheet 13.

【0057】次に、第3の実施形態に係る電池パックに
ついて説明する。本実施形態は、複数の二次電池を用い
た電池パックについて示すものである。
Next, a battery pack according to the third embodiment will be described. This embodiment shows a battery pack using a plurality of secondary batteries.

【0058】図18は、第3の実施形態に係る電池パッ
ク200の外観を示すもので、図19に示すように、扁
平角形に構成された2個の二次電池2a,2bを直列接
続して回路基板203に接続し、2個の二次電池2a,
2bと回路基板203とを樹脂モールド体202によっ
て一体化したものである。
FIG. 18 shows the external appearance of the battery pack 200 according to the third embodiment. As shown in FIG. 19, two flat batteries 2a and 2b each having a flat rectangular shape are connected in series. Connected to the circuit board 203 to connect the two secondary batteries 2a,
2b and the circuit board 203 are integrated by a resin mold body 202.

【0059】二次電池2a,2bは、基本的な構造は前
述の二次電池2と同様であるが、二次電池2a,2b間
の一体化を確実にするために電池缶22の底面にも係合
部材26、26が接合されている。回路基板203の正
極接続ランドと二次電池2bの電池缶22底面とは正極
接続リード板204で接続され、回路基板203の負極
接続ランドと二次電池2a上に配設された前記温度ヒュ
ーズ10の他方接続片10bとは負極接続リード板20
5で接続される。また、二次電池2aの封口板23と二
次電池2bのリベット25との間は直列接続リード板2
07で接続される。
The secondary batteries 2a and 2b have the same basic structure as that of the secondary battery 2 described above, but the secondary batteries 2a and 2b are provided on the bottom surface of the battery can 22 to ensure the integration between the secondary batteries 2a and 2b. Also, the engaging members 26, 26 are joined. The positive electrode connecting land of the circuit board 203 and the bottom surface of the battery can 22 of the secondary battery 2b are connected by a positive electrode connecting lead plate 204, and the temperature fuse 10 arranged on the negative electrode connecting land of the circuit board 203 and the secondary battery 2a. And the other connection piece 10b of the negative electrode connection lead plate 20
Connected at 5. Further, between the sealing plate 23 of the secondary battery 2a and the rivet 25 of the secondary battery 2b, the series connection lead plate 2 is provided.
It is connected at 07.

【0060】直列接続された2個の二次電池2a,2b
と回路基板203とは、図19に示すように、並列間に
所定間隔を設けて互いに逆向きとなるように金型内に配
置され、一次モールドがなされる。この工程において、
二次電池2a,2bの上下と並列間に樹脂が充填成形さ
れ、2個の二次電池2a,2bと回路基板203とを一
体化した樹脂モールド体202が形成される。二次電池
2a,2bの上下に設けられている係合部材26は樹脂
モールド体202に対して投錨効果を得て、二次電池2
a,2bに樹脂モールド体202を固着させる。従っ
て、正極及び負極の各接続リード板204,205と直
列接続リード板207で接続されただけで不安定な状態
の二次電池2a,2b及び回路基板203は堅固に一体
化される。
Two secondary batteries 2a, 2b connected in series
As shown in FIG. 19, the circuit board 203 and the circuit board 203 are arranged in a mold so as to be opposite to each other with a predetermined gap provided between them, and the primary molding is performed. In this process,
Resin is filled and molded between the upper and lower sides of the secondary batteries 2a and 2b and in parallel to form a resin mold body 202 in which the two secondary batteries 2a and 2b and the circuit board 203 are integrated. The engaging members 26 provided above and below the secondary batteries 2a and 2b have an anchoring effect on the resin mold body 202, and
The resin mold body 202 is fixed to a and 2b. Therefore, the secondary batteries 2a and 2b and the circuit board 203 which are unstable only by being connected to the positive and negative connection lead plates 204 and 205 and the serial connection lead plate 207 are firmly integrated.

【0061】図19に示す状態でも電池パックとして機
能するが、更なる強度の向上及び外観の向上のために外
装被覆を施すことにより、図18に示す電池パック20
0に形成することができる。外装被覆は、第2の実施形
態で示した電池パック1と同様に、二次モールドと巻着
シートとによって行なうことができる。また、二次電池
2aの封口板23上には、図10に示した場合と同様に
リベット25に接続して温度ヒューズ10が取り付けら
れ、安全弁20上には樹脂シート40が貼着される。
Although it functions as a battery pack even in the state shown in FIG. 19, a battery pack 20 shown in FIG. 18 is provided by applying an outer coating to further improve strength and appearance.
Can be formed to 0. The exterior coating can be performed by the secondary mold and the winding sheet as in the battery pack 1 shown in the second embodiment. Further, the thermal fuse 10 is attached to the sealing plate 23 of the secondary battery 2a by being connected to the rivet 25 as in the case shown in FIG. 10, and the resin sheet 40 is attached to the safety valve 20.

【0062】複数の二次電池を直列及び/又は並列に接
続した電池パックの構成は、上記第3の実施形態に示し
た2個の二次電池2a,2bを直列接続した形態の他、
必要に応じて任意数の二次電池を用いて構成することが
できる。例えば、図20に示すように、4個の二次電池
2a〜2dを直列接続した電池パックに構成することが
できる。この場合も各二次電池2a〜2dの封口板23
及び電池缶22の底面に係合部材26を設けて樹脂を充
填成形すると複数の二次電池2a〜2dと回路基板20
3とを強固に一体化することができる。
The configuration of the battery pack in which a plurality of secondary batteries are connected in series and / or in parallel is not limited to the form in which the two secondary batteries 2a and 2b shown in the third embodiment are connected in series.
It can be configured by using an arbitrary number of secondary batteries as needed. For example, as shown in FIG. 20, it is possible to configure a battery pack in which four secondary batteries 2a to 2d are connected in series. Also in this case, the sealing plate 23 of each of the secondary batteries 2a to 2d
Further, when the engaging member 26 is provided on the bottom surface of the battery can 22 and the resin is filled and molded, the plurality of secondary batteries 2a to 2d and the circuit board 20 are formed.
3 can be firmly integrated.

【0063】[0063]

【発明の効果】以上の説明の通り本発明に係る一体化電
池は、電池本体と基板とを樹脂モールド体により一体化
し、加えて、前記基板の外周縁形状が前記電池本体の扁
平な一側面の形状に合致しているので、一体化した部位
の堅牢性を向上させた電池に構成することができる。
As described above, in the integrated battery according to the present invention, the battery main body and the substrate are integrated by the resin mold body, and in addition, the outer peripheral edge shape of the substrate is one flat side surface of the battery main body. Since it conforms to the shape of, the battery can be configured to have improved robustness of the integrated portion.

【0064】また、本発明に係る電池パックは、樹脂成
形によるパックケースを用いることなく二次電池と回路
基板等を一体化した電池パックに構成することができ、
特に二次電池本体の基板配設面の反対面にあたる部位の
堅牢性を向上させた電池パックに構成することができ
る。これにより、小型薄型化を可能とすると共に、樹脂
モールドによる堅牢な構造により携帯電子機器のように
振動や衝撃が加わることが避け難い機器に適用するのに
好適なものとなる。また、樹脂成形によるケースを用い
ないので、樹脂成形金型を製作するための期間や費用が
削減され、多品種少量生産に適応させることができる。
Further, the battery pack according to the present invention can be constructed as a battery pack in which the secondary battery, the circuit board and the like are integrated without using a resin-molded pack case.
In particular, it is possible to form a battery pack in which the robustness of the portion of the secondary battery main body opposite to the surface on which the substrate is provided is improved. This makes it possible to reduce the size and thickness, and due to the robust structure of the resin mold, it is suitable for application to a device such as a portable electronic device in which vibration or impact is unavoidable. Further, since the case formed by resin molding is not used, the period and cost for manufacturing the resin molding die are reduced, and it is possible to adapt to high-mix low-volume production.

【図面の簡単な説明】[Brief description of drawings]

【図1】実施形態に係る電池の外観を示す斜視図。FIG. 1 is a perspective view showing an external appearance of a battery according to an embodiment.

【図2】電池本体の構成を示す(a)は平面図、(b)
は断面図。
FIG. 2A is a plan view showing the configuration of a battery body, and FIG.
Is a cross-sectional view.

【図3】電池本体にPTC素子を取り付けた状態での
(a)は平面図、(b)は断面図。
FIG. 3A is a plan view and FIG. 3B is a cross-sectional view with a PTC element attached to a battery body.

【図4】端子板の構成を(a)は外面側、(b)は内面
側、(c)はリード板取付け状態をそれぞれ示す斜視
図。
FIG. 4 is a perspective view showing the configuration of the terminal plate, where (a) is the outer surface side, (b) is the inner surface side, and (c) is the lead plate mounting state.

【図5】端子板の電池本体への取付け状態を示す斜視
図。
FIG. 5 is a perspective view showing how the terminal plate is attached to the battery body.

【図6】端子板と電池本体とを樹脂モールド体で一体化
した状態を示す断面図。
FIG. 6 is a cross-sectional view showing a state where a terminal plate and a battery body are integrated with a resin mold body.

【図7】外装被覆を施した状態の電池の斜視図。FIG. 7 is a perspective view of a battery with an outer coating.

【図8】実施形態に係る電池パックの外観を示す斜視
図。
FIG. 8 is a perspective view showing the external appearance of the battery pack according to the embodiment.

【図9】電池パックの各構成要素を示す分解斜視図。FIG. 9 is an exploded perspective view showing each component of the battery pack.

【図10】二次電池に温度ヒューズを取り付けた状態を
示す(a)は平面図、(b)は断面図。
FIG. 10A is a plan view showing a state in which a thermal fuse is attached to a secondary battery, and FIG. 10B is a sectional view.

【図11】二次電池に回路基板を取り付けた状態を示す
斜視図。
FIG. 11 is a perspective view showing a state in which a circuit board is attached to the secondary battery.

【図12】電池パックの各製造工程における状態を示す
斜視図。
FIG. 12 is a perspective view showing a state in each manufacturing process of the battery pack.

【図13】二次電池に回路基板を樹脂モールド体によっ
て一体化した状態を示す断面図。
FIG. 13 is a cross-sectional view showing a state in which a circuit board is integrated with a secondary battery by a resin mold body.

【図14】一次モールド金型の構成を示す模式図。FIG. 14 is a schematic diagram showing a configuration of a primary molding die.

【図15】二次モールド金型の構成を示す斜視図。FIG. 15 is a perspective view showing the configuration of a secondary molding die.

【図16】二次モールド体を形成した状態を示す断面
図。
FIG. 16 is a sectional view showing a state in which a secondary mold body is formed.

【図17】連結成形部の形成位置を説明する断面図。FIG. 17 is a cross-sectional view illustrating a formation position of a connection molding portion.

【図18】複数の二次電池を用いた電池パックの外観を
示す斜視図。
FIG. 18 is a perspective view showing the appearance of a battery pack using a plurality of secondary batteries.

【図19】同上電池パックの一体化構造を説明する模式
図。
FIG. 19 is a schematic diagram illustrating an integrated structure of the battery pack of the same.

【図20】複数の二次電池を用いた電池パックの一体化
構造を説明する模式図。
FIG. 20 is a schematic diagram illustrating an integrated structure of a battery pack using a plurality of secondary batteries.

【符号の説明】[Explanation of symbols]

1 電池パック 2 二次電池 3 回路基板 4 正極リード板(接続部材) 5 負極リード板(接続部材) 6 外部接続端子 7 樹脂充填対象物 8 中間完成品 10 温度ヒューズ 11 一次モールド体 12 二次モールド体 13 巻着シート 14 インシュレータ(下部樹脂成形体) 16 断熱シート 17 上部成形部 18 下部成形部 19 連結成形部 23 封口板 26 係合突起 100a、100b、100c、100d 電池 101 電池本体 102 端子板(基板) 103 樹脂モールド体 104 正極外部接続端子 105 負極外部接続端子 1 battery pack 2 Secondary battery 3 circuit board 4 Positive electrode lead plate (connection member) 5 Negative electrode lead plate (connecting member) 6 External connection terminal 7 Resin filling target 8 Intermediate finished products 10 Thermal fuse 11 Primary mold body 12 Secondary mold body 13 Wrapping sheet 14 Insulator (lower resin molding) 16 Insulation sheet 17 Upper molding part 18 Lower molding part 19 Connection molding part 23 Seal plate 26 Engagement protrusion 100a, 100b, 100c, 100d batteries 101 Battery body 102 terminal board (board) 103 Resin mold body 104 Positive electrode external connection terminal 105 Negative electrode external connection terminal

───────────────────────────────────────────────────── フロントページの続き (72)発明者 鶴田 邦夫 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 Fターム(参考) 5H040 AA07 AA20 AS12 AY08 DD06 DD08 DD10 DD24 JJ05    ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kunio Tsuruta             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 5H040 AA07 AA20 AS12 AY08 DD06                       DD08 DD10 DD24 JJ05

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 1又は複数の電池本体と、この電池本体
の上面に対して平行に配設されて少なくとも外部接続用
端子が形成された基板と、この基板と前記電池本体とを
電気的に接続する接続部材と、充填成形された樹脂が電
池本体及び基板それぞれの任意面に固着して両者を一体
化した樹脂モールド体と、この樹脂モールド体を電池及
び/又は基板に係合させる係合手段と、を備えて構成さ
れた基板一体化電池であって、前記基板の外周縁形状が
前記電池本体の少なくとも扁平な一側面の形状に合致し
ていることを特徴とする基板一体化電池。
1. One or a plurality of battery main bodies, a substrate disposed in parallel with an upper surface of the battery main body and provided with at least an external connection terminal, and the substrate and the battery main body electrically. A connecting member to be connected, a resin molded body in which the filled and molded resin is fixed to arbitrary surfaces of the battery main body and the substrate to integrate them, and an engagement for engaging the resin molded body with the battery and / or the substrate. And an outer peripheral edge shape of the substrate conforming to the shape of at least one flat side surface of the battery main body.
【請求項2】 1又は複数の電池本体と、この電池本体
の上面に対して平行に配設されて少なくとも外部接続用
端子が形成された基板と、この基板と前記電池本体とを
電気的に接続する接続部材と、充填成形された樹脂が電
池本体及び基板それぞれの任意面に固着して両者を一体
化した樹脂モールド体と、この樹脂モールド体を電池本
体及び/又は基板に係合させる係合手段と、を備えて構
成された基板一体化電池に対し、少なくとも前記外部接
続用端子を外部露出させ、基板及び樹脂モールド体を被
覆する上部樹脂成形体と、電池本体の基板配設面の反対
面を被覆する下部樹脂成形体と、上部樹脂成形体及び下
部樹脂成形体の一部と電池本体の胴部分とを被覆して巻
着された巻着シートとにより、外面を被覆してなる電池
パックであって、下部樹脂成形体があらかじめ成形され
た樹脂成形板からなり、前記樹脂成形板が電池本体の基
板配設面の反対面全面を被覆することを特徴する電池パ
ック。
2. One or a plurality of battery main bodies, a substrate arranged in parallel to the upper surface of the battery main body and having at least external connection terminals formed thereon, and the substrate and the battery main body electrically. A connecting member to be connected, a resin molded body in which the filled and molded resin is fixed to arbitrary surfaces of the battery main body and the substrate to integrate them, and a member for engaging the resin molded body with the battery main body and / or the substrate. And an upper resin molded body that exposes at least the external connection terminal to the outside and covers the substrate and the resin mold body, and a battery mounting surface of the battery body. The outer surface is covered with a lower resin molded body that covers the opposite surface, and a wrapping sheet that is wound by covering a part of the upper resin molded body and the lower resin molded body and the body portion of the battery body. Battery pack, below 2. A battery pack, wherein the resin molded body comprises a resin molded plate which has been molded in advance, and the resin molded plate covers the entire surface of the battery main body opposite to the substrate mounting surface.
JP2002358930A 2001-06-28 2002-12-11 Board-integrated battery and battery pack Pending JP2003162987A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002358930A JP2003162987A (en) 2001-06-28 2002-12-11 Board-integrated battery and battery pack

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2001-196234 2001-06-28
JP2001196234 2001-06-28
JP2002358930A JP2003162987A (en) 2001-06-28 2002-12-11 Board-integrated battery and battery pack

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2002185398A Division JP3929839B2 (en) 2001-06-28 2002-06-26 Batteries and battery packs

Publications (1)

Publication Number Publication Date
JP2003162987A true JP2003162987A (en) 2003-06-06

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JP2004006213A (en) * 2002-03-22 2004-01-08 Matsushita Electric Ind Co Ltd Battery pack
WO2005069408A1 (en) * 2004-01-20 2005-07-28 Matsushita Electric Industrial Co., Ltd. Battery pack
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JP2006128062A (en) * 2004-10-28 2006-05-18 Samsung Sdi Co Ltd Secondary battery
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US7396600B2 (en) 2003-09-16 2008-07-08 Sanyo Electric Co., Ltd. Battery pack
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JP2003308815A (en) * 2002-02-13 2003-10-31 Matsushita Electric Ind Co Ltd Battery pack and its manufacturing method
JP4629952B2 (en) * 2002-02-13 2011-02-09 パナソニック株式会社 Manufacturing method of secondary battery
JP2011023369A (en) * 2002-02-13 2011-02-03 Panasonic Corp Battery pack
US7972721B2 (en) 2002-02-13 2011-07-05 Panasonic Corporation Method for manufacturing battery pack
JP4589596B2 (en) * 2002-03-22 2010-12-01 パナソニック株式会社 Battery pack
JP2004006213A (en) * 2002-03-22 2004-01-08 Matsushita Electric Ind Co Ltd Battery pack
EP1492176A1 (en) * 2002-03-22 2004-12-29 Matsushita Electric Industrial Co., Ltd. Battery pack
EP1492176A4 (en) * 2002-03-22 2009-08-05 Panasonic Corp Battery pack
US7396600B2 (en) 2003-09-16 2008-07-08 Sanyo Electric Co., Ltd. Battery pack
US7262956B2 (en) 2003-11-14 2007-08-28 Sony Corporation Battery pack and method for manufacturing the same
US7556885B2 (en) * 2003-11-14 2009-07-07 Sony Corporation Battery pack
WO2005069408A1 (en) * 2004-01-20 2005-07-28 Matsushita Electric Industrial Co., Ltd. Battery pack
US7846577B2 (en) 2004-01-20 2010-12-07 Panasonic Corporation Battery pack
JP2005243362A (en) * 2004-02-25 2005-09-08 Hitachi Maxell Ltd Manufacturing method of battery pack
US7951505B2 (en) 2004-04-27 2011-05-31 Panasonic Corporation Fuel cell system that supplies to individual cells of a fuel cell stack independently
JP4603906B2 (en) * 2004-10-28 2010-12-22 三星エスディアイ株式会社 Secondary battery
US8691408B2 (en) 2004-10-28 2014-04-08 Samsung Sdi Co., Ltd. Secondary battery including protective circuit module to protect battery when swelling occurs
JP2006128062A (en) * 2004-10-28 2006-05-18 Samsung Sdi Co Ltd Secondary battery
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JP2006228714A (en) * 2005-01-21 2006-08-31 Sony Corp Battery pack
JP2006202655A (en) * 2005-01-21 2006-08-03 Sony Corp Battery pack
JP2009259778A (en) * 2008-04-11 2009-11-05 Samsung Sdi Co Ltd Battery pack
US8178232B2 (en) 2008-04-11 2012-05-15 Samsung Sdi Co., Ltd. Battery pack
KR101126442B1 (en) 2009-05-22 2012-03-28 주식회사 이랜텍 Metal mold for battery pack case
JP2012023008A (en) * 2010-07-12 2012-02-02 Samsung Sdi Co Ltd Battery pack
US9118058B2 (en) 2010-07-12 2015-08-25 Samsung Sdi Co., Ltd. Battery pack having a flat external shape and designed for smaller and lighter devices

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