JP2004221024A - Battery - Google Patents

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Publication number
JP2004221024A
JP2004221024A JP2003010172A JP2003010172A JP2004221024A JP 2004221024 A JP2004221024 A JP 2004221024A JP 2003010172 A JP2003010172 A JP 2003010172A JP 2003010172 A JP2003010172 A JP 2003010172A JP 2004221024 A JP2004221024 A JP 2004221024A
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Japan
Prior art keywords
circuit board
unit cell
space
electrode terminal
battery
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JP2003010172A
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Japanese (ja)
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JP4162212B2 (en
Inventor
Tatsuya Kamata
龍也 鎌田
Masatomo Tanaka
正智 田中
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Maxell Holdings Ltd
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Hitachi Maxell Ltd
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Priority to JP2003010172A priority Critical patent/JP4162212B2/en
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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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery allowing a circuit board to be properly installed in a unit cell, and capable of reducing the cost of a die used for coating the circuit board. <P>SOLUTION: The opening of an armoring material 3 is closed by a sealing member 8 with an electrode body housed in the armoring material 3 of the unit cell 1. The circuit board 2 is installed in the unit cell 1. By disposing the sealing member 8 at a position of the armoring material 3 receding inward relative to the opening surface of the armoring material 3, a space 9 surrounded by the armoring material 3 with the front face opened is formed on the front side of the sealing member 8. A tip part of a negative electrode terminal 14 of the unit cell 1 pierces the sealing member 8. The space 9 is filled with a resin material 11 with the circuit board 2 housed in the space 9 by fitting the tip side of a lead body 18 of a negative electrode of the circuit board 2 to the terminal 14 of the unit cell 1. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、携帯電話などの小型電子機器の電源として用いるのに適した、特に薄型のリチウムイオン二次電池などの電池に関する。
【０００２】
【従来の技術】
保護回路などを有する回路基板を素電池に取り付けて一体化した電池が知られている。この従来例としては、回路基板を素電池に配置して、この素電池の電極端子に回路基板のリード体を接続したのち、絶縁ホルダで回路基板を素電池に固定して、回路基板を素電池に一体化するものがある（特許文献１参照）。
【０００３】
また、素電池の外面に回路基板を貼り付けて、この素電池の電極端子に回路基板のリード体を接続したのち、合成樹脂で素電池と共に前記回路基板全体を被覆して、回路基板を素電池に一体化するものがある（特許文献２参照）。
【０００４】
【特許文献１】
特開２００１−１９６０４８号公報（段落番号００２４、図１）
【特許文献２】
特開２０００−３１５４８３号公報（段落番号００２７、図４）
【０００５】
【発明が解決しようとする課題】
特許文献１・２の電池では、回路基板を素電池に位置決めする手段がないために、回路基板を素電池に一体化するまでに回路基板が動くおそれがある。この結果、回路基板のリード体が素電池の電極端子からずれた状態で接続されるおそれがあり、また、電池の組立において折り曲げなどの工程が入り、電池の組立工程を自動化することが困難であるところに問題がある。
【０００６】
更に特許文献２の電池では、素電池の外面の広い範囲を合成樹脂で被覆することになるため、この被覆を成形する金型の作成にコストが掛かるところに問題がある。
【０００７】
本発明の目的は、回路基板を素電池に適正に配置できるうえ、回路基板の被覆に使用する金型のコストを低減できる電池を得ることであり、また、電池の組立工程の自動化を容易にすることにある。
【０００８】
【課題を解決するための手段】
本発明が対象とする電池は、図２に示すごとく、開口を有する有底筒状の外装材３に電極体を収容した素電池１と、この素電池１に一体化した回路基板２とを有し、前記外装材３の開口が封口体８で塞がれており、前記電極体に電極端子１４が接続されて、当該電極端子１４の先端部が前記封口体８を貫通しており、前記回路基板２にリード体１８が接続されて、当該リード体１８の先端側が前記回路基板２から延出している。本発明は、前記封口体８が、前記外装材３の開口面より前記外装材３の内方に後退した位置に配置されることで、前記封口体８と前記外装材３の開口面との間に、前記外装材３で囲まれた空間９が形成されており、前記リード体１８が、前記電極端子１４の先端部に嵌合可能な形状に形成されており、前記リード体１８が前記電極端子１４の先端部に嵌合し、前記回路基板２が前記空間９内に収容された状態で、前記空間９内が樹脂材１１で充填されていることを特徴とする。
【０００９】
ここでの素電池１は、リチウムイオン二次電池や一次電池などが該当する。電極端子１４は、正極端子の場合と負極端子の場合とが含まれる。回路基板２は、小型電子機器としての通信機器に対する出力端子などを有しており、合成樹脂などで被覆されてモジュール化され、そのモジュールからリード体１８の先端側が延出している場合も含まれる。樹脂材１１は、ポリアミド樹脂や、ポリウレタン樹脂や、ポリカーボネート樹脂や、アクリロニトリルブタジエンスチレン樹脂などの合成樹脂などが該当する。
【００１０】
具体的には、図２に示すごとく、リード体１８が、電極端子１４に覆い被さることで嵌合する形状になっている。また、外装材３が、回路基板２の移動を規制している。
【００１１】
更に回路基板２は、保護回路や充電回路を有するものとすることができる。保護回路を有すると、素電池１を過充電や過放電から保護でき、充電回路を有すると、素電池１への充電を行わせるとともにその充電電流を制御することができる。
【００１２】
【発明の作用効果】
本発明によれば、回路基板２のリード体１８が素電池１の電極端子１４の先端部に嵌合することで、回路基板２を位置決めできる。従って、回路基板２が適正な位置に配置されて、回路基板２のリード体１８の素電池１の電極端子１４への正確な接続などができるうえ、回路基板２を位置決めできる分だけ電池の組立工程の自動化が容易になる。
【００１３】
しかも、素電池１の外装材３を利用して空間９を設け、この空間９内に回路基板２を収容して樹脂材１１を充填しているので、その樹脂材１１は、電池の前面側のみを成形すればよいことになる。従って、樹脂材１１の成形に簡易な形状の金型で済むことになり、金型のコストを低減できる。
【００１４】
回路基板２のリード体１８が、素電池１の電極端子１４に覆い被さる形状になっていると、正確に位置決めできるうえ、リード体１８と素電池１の電極端子１４との接触面積が大きくなってスポット溶接などがしやすくなる。
【００１５】
外装材３で、回路基板２の移動が規制されると、回路基板２が一層正確に位置決めされる。
【００１６】
【発明の実施の形態】
図１ないし図３は本発明に係る電池を示す。電池は、図１に示すごとく矩形薄型に形成された素電池１と、この素電池１に配置された回路基板２（図２）とを有している。
【００１７】
素電池１は、充放電が可能なリチウムイオン二次電池であって、外装材３として前面が開口する有底筒状のアルミニウム缶や鉄缶などが使用される。電池は、図１に示すごとく、前後の側面４・５が上下に短くて左右に長い矩形状になっており、左右の側面６・７が上下に短くて前後に長い矩形状になっている。
【００１８】
外装材３の開口は、図２に示すごとく、アルミニウムや鉄などからなる封口体８で塞がれる。封口体８は、外装材３の前面の開口面より外装材３の内方（図２では下側）に後退した位置に配置されており、これによって封口体８の前側に、外装材３で囲まれるとともに前面が開放された空間９（図３参照）が設けられる。この空間９内に、回路基板２を収容した状態で樹脂材１１が充填される。
【００１９】
回路基板２は、保護回路や充電回路やポリスイッチ（ＰＴＣ）などを有するＣＯＢ（Ｃｈｉｐ Ｏｎ Ｂｏａｒｄ）モジュールであり、前記空間９内において、絶縁テープ１２を挟んで封口体８の前面側に取り付けられる。
【００２０】
外装材３の内部には、電極体が電解液と共に液密状に収容される。封口体８の右寄り箇所には、直方体形状の負極端子（電極端子）１４の先端部が貫通しており、この負極端子１４の先端部が、前記絶縁テープ１２の右寄り箇所に設けた正方形状の嵌合孔１５に嵌合する。素電池１の外装材３は、正極を兼ねている。なお、負極端子１４は、絶縁パッキン１６によって封口体８から絶縁される。
【００２１】
電極体は、シート状の正極電極と、シート状の負極電極との間にシート状の絶縁セパレータを挟んで渦巻き状に巻回しており、この状態で断面ほぼ長円形状に押し潰した扁平形状になっている。保護回路は、素電池１を過充電や過放電から保護するものである。充電回路は、素電池１への充電を行わせるとともにこの充電電流を制御するものである。ポリスイッチは、素電池１の温度が過剰に上昇すると、素電池１に流れる電流を遮断するものである。
【００２２】
回路基板２は、この左右から正負極のリード体１７・１８の先端側がそれぞれ延出しており、正極のリード体１７の先端側が封口体８の前面に接続される。負極のリード体１８は、図３に示すごとく、先端側が前方に向けて凸状に折り曲げられており、この先端部１８ａが、素電池１の負極端子１４に覆い被さって嵌合される。正負極のリード体１７・１８は、細長いニッケルなどの薄板で形成される。
【００２３】
回路基板２の上下の幅は、外装材３の上下の側壁２１・２２の間隔より僅かに小さいだけであって、回路基板２を前記空間９内に収納したときには、外装材３の上下の側壁２１・２２で回路基板２の上下方向の位置決めが行われる。
【００２４】
また、回路基板２の上下の幅Ｌ１は、負極のリード体１８の上下の幅Ｌ２よりも大きくなっている。これにより、樹脂材１１が充填される前に回路基板２が空間９内で上下にがたついても、回路基板２が負極のリード体１８よりも先に外装材３の上下の側壁２１・２２に当接して、負極のリード体１８と外装材３とがショートすることを確実に防止できる。
【００２５】
回路基板２の前面には、図２に示すごとく、小型電子機器への電源供給用の負極接続子１９が突出している。前記樹脂材１１は、ポリアミド樹脂や、ポリウレタン樹脂や、ポリカーボネート樹脂や、アクリロニトリルブタジエンスチレン樹脂などの合成樹脂で形成されており、この樹脂材１１によって回路基板２、リード体１７・１８および負極端子１４が絶縁されて保護される。前記負極接続子１９の前端部は、樹脂材１１の前面よりも前方（図２では上側）へ突出している。
【００２６】
次に、前記素電池１の製造方法を説明すると、素電池１の空間９内において、絶縁テープ１２の嵌合孔１５を素電池１の負極端子１４の先端部に嵌合して、絶縁テープ１２を封口体８の前面に配置する。更に回路基板２の負極のリード体１８の先端部１８ａを素電池１の負極端子１４に覆い被せて嵌合して、回路基板２を位置決めする。このとき、回路基板２は前記空間９内に収容されている。
【００２７】
この状態で、回路基板２の負極のリード体１８の先端部１８ａを素電池１の負極端子１４にスポット溶接などで接続し、更に正極のリード体１７の先端側を封口体８にスポット溶接などで接続する。これにより、回路基板２が素電池１に固定される。
【００２８】
この後、素電池１を金型内に装着して、素電池１の空間９内に溶融合成樹脂を注入して固化させることにより、回路基板２およびリード体１７・１８が樹脂材１１で被覆され（図２の状態）、図１の電池が完成する。
【００２９】
このように、回路基板２の負極のリード体１８を素電池１の負極端子１４の先端部に覆い被せて嵌合することで、回路基板２が位置決めされるので、回路基板２の正負極のリード体１７・１８を素電池１の正負の電極に正確に接続できる。
【００３０】
また、素電池１の外装材３を利用して素電池１に空間９内を設け、この空間９内に回路基板２を収容して合成樹脂を充填するので、素電池１の前側面２のみを金型で成形するだけで回路基板２を被覆できる。
【００３１】
回路基板２の負極のリード体１８を凸状に折り曲げて、素電池１の負極端子１４に嵌合させることに代えて、負極のリード体１８に嵌合孔を設け、この負極のリード体１８の嵌合孔を素電池１の負極端子１４に嵌合させてもよい。
【００３２】
前記実施例では、回路基板２をＣＯＢモジュールとしたが、回路基板２としてディスクリートモジュールを前記空間９内に収容して合成樹脂を充填してもよい。
【図面の簡単な説明】
【図１】本発明に係る電池の斜視図である。
【図２】電池の要部断面図である。
【図３】電池の要部の分解斜視図である。
【符号の説明】
１ 素電池
２ 回路基板
３ 外装材
８ 封口体
９ 空間
１１ 樹脂材
１４ 素電池の負極端子
１８ 負極のリード体
１８ａ 負極のリード体の先端部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a battery, such as a thin lithium-ion secondary battery, which is suitable for use as a power source for small electronic devices such as a mobile phone.
[0002]
[Prior art]
2. Description of the Related Art A battery is known in which a circuit board having a protection circuit and the like is attached to a unit cell and integrated. In this conventional example, a circuit board is arranged on a unit cell, a lead body of the circuit board is connected to an electrode terminal of the unit cell, and then the circuit board is fixed to the unit cell with an insulating holder, and the circuit board is mounted on the unit cell. There is one integrated with a battery (see Patent Document 1).
[0003]
Also, after attaching a circuit board to the outer surface of the unit cell and connecting the lead body of the circuit board to the electrode terminals of the unit cell, the entire circuit board is covered with a synthetic resin together with the unit cell, and the circuit board is assembled. Some are integrated with a battery (see Patent Document 2).
[0004]
[Patent Document 1]
JP 2001-196048 A (paragraph number 0024, FIG. 1)
[Patent Document 2]
JP 2000-315483 A (paragraph number 0027, FIG. 4)
[0005]
[Problems to be solved by the invention]
In the batteries of Patent Documents 1 and 2, since there is no means for positioning the circuit board on the unit cell, the circuit board may move before the circuit board is integrated into the unit cell. As a result, there is a possibility that the lead body of the circuit board may be connected in a state of being shifted from the electrode terminal of the unit cell, and a step such as bending may be involved in assembling the battery, making it difficult to automate the battery assembling step. There is a problem somewhere.
[0006]
Furthermore, in the battery of Patent Document 2, since a wide area of the outer surface of the unit cell is covered with the synthetic resin, there is a problem in that a cost is required to prepare a mold for molding the cover.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a battery in which a circuit board can be appropriately arranged on a unit cell, a cost of a mold used for covering the circuit board can be reduced, and the battery assembly process can be easily automated. Is to do.
[0008]
[Means for Solving the Problems]
As shown in FIG. 2, the battery to which the present invention is applied includes a unit cell 1 in which an electrode body is accommodated in a bottomed cylindrical exterior member 3 having an opening, and a circuit board 2 integrated with the unit cell 1. An opening of the exterior material 3 is closed by a sealing body 8, an electrode terminal 14 is connected to the electrode body, and a tip end of the electrode terminal 14 penetrates the sealing body 8; A lead body 18 is connected to the circuit board 2, and a tip side of the lead body 18 extends from the circuit board 2. In the present invention, the sealing body 8 is disposed at a position retracted inward of the exterior material 3 from the opening surface of the exterior material 3, so that the sealing body 8 and the opening surface of the exterior material 3 A space 9 surrounded by the exterior material 3 is formed therebetween, and the lead body 18 is formed in a shape that can be fitted to the tip of the electrode terminal 14. The space 9 is filled with a resin material 11 in a state where the circuit board 2 is housed in the space 9 while being fitted to the tip of the electrode terminal 14.
[0009]
The unit cell 1 here corresponds to a lithium ion secondary battery, a primary battery, or the like. The electrode terminal 14 includes a case of a positive terminal and a case of a negative terminal. The circuit board 2 has an output terminal or the like for a communication device as a small electronic device, is covered with a synthetic resin or the like to form a module, and the case where the leading end side of the lead body 18 extends from the module is also included. . The resin material 11 corresponds to a synthetic resin such as a polyamide resin, a polyurethane resin, a polycarbonate resin, and an acrylonitrile butadiene styrene resin.
[0010]
Specifically, as shown in FIG. 2, the lead body 18 has a shape that fits by covering the electrode terminal 14. Further, the exterior material 3 regulates the movement of the circuit board 2.
[0011]
Further, the circuit board 2 may have a protection circuit and a charging circuit. With the protection circuit, the unit cell 1 can be protected from overcharge or overdischarge, and with the charge circuit, the unit cell 1 can be charged and its charging current can be controlled.
[0012]
Effects of the Invention
According to the present invention, the circuit board 2 can be positioned by fitting the lead body 18 of the circuit board 2 to the tip of the electrode terminal 14 of the unit cell 1. Therefore, the circuit board 2 is disposed at an appropriate position, the lead 18 of the circuit board 2 can be accurately connected to the electrode terminal 14 of the unit cell 1, and the battery assembly can be as much as the circuit board 2 can be positioned. Automation of the process becomes easy.
[0013]
Moreover, since the space 9 is provided by using the exterior material 3 of the unit cell 1 and the circuit board 2 is accommodated in the space 9 and filled with the resin material 11, the resin material 11 is placed on the front side of the battery. It is only necessary to mold only. Therefore, it is sufficient to use a mold having a simple shape for molding the resin material 11, and the cost of the mold can be reduced.
[0014]
When the lead body 18 of the circuit board 2 is shaped to cover the electrode terminals 14 of the unit cell 1, accurate positioning can be achieved, and the contact area between the lead body 18 and the electrode terminals 14 of the unit cell 1 increases. This makes spot welding easier.
[0015]
When the movement of the circuit board 2 is regulated by the exterior material 3, the circuit board 2 is positioned more accurately.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 3 show a battery according to the present invention. The battery has a unit cell 1 formed in a rectangular thin shape as shown in FIG. 1, and a circuit board 2 (FIG. 2) disposed on the unit cell 1.
[0017]
The unit cell 1 is a chargeable / dischargeable lithium ion secondary battery, and a bottomed cylindrical aluminum can or iron can with an open front surface is used as the exterior material 3. As shown in FIG. 1, the front and rear sides 4 and 5 of the battery are vertically short and vertically long, and the left and right sides 6 and 7 are vertically short and vertically long. .
[0018]
As shown in FIG. 2, the opening of the exterior material 3 is closed by a sealing body 8 made of aluminum, iron, or the like. The sealing body 8 is disposed at a position retracted inward (downward in FIG. 2) of the packaging material 3 from the front opening surface of the packaging material 3. A space 9 (see FIG. 3) that is enclosed and has an open front surface is provided. The resin material 11 is filled in the space 9 with the circuit board 2 accommodated therein.
[0019]
The circuit board 2 is a COB (Chip On Board) module having a protection circuit, a charging circuit, a polyswitch (PTC), and the like, and is attached to the front side of the sealing body 8 with the insulating tape 12 interposed in the space 9. .
[0020]
The electrode body is accommodated in the exterior material 3 in a liquid-tight state together with the electrolytic solution. The tip of a rectangular parallelepiped negative electrode terminal (electrode terminal) 14 penetrates through the right side of the sealing body 8, and the tip of the negative electrode terminal 14 has a square shape provided at the right side of the insulating tape 12. It fits into the fitting hole 15. The exterior material 3 of the unit cell 1 also serves as a positive electrode. In addition, the negative electrode terminal 14 is insulated from the sealing body 8 by the insulating packing 16.
[0021]
The electrode body is spirally wound with a sheet-shaped insulating separator sandwiched between a sheet-shaped positive electrode and a sheet-shaped negative electrode. In this state, the flat shape is crushed into a substantially elliptical cross section. It has become. The protection circuit protects the unit cell 1 from overcharge or overdischarge. The charging circuit controls the charging current while charging the unit cell 1. The polyswitch cuts off the current flowing through the unit cell 1 when the temperature of the unit cell 1 rises excessively.
[0022]
The front ends of the positive and negative leads 17 and 18 extend from the left and right sides of the circuit board 2, and the front ends of the positive leads 17 are connected to the front surface of the sealing body 8. As shown in FIG. 3, the lead body 18 of the negative electrode has a distal end side bent in a convex shape toward the front, and the distal end portion 18 a covers and fits the negative electrode terminal 14 of the unit cell 1. The lead members 17 and 18 of the positive and negative electrodes are formed of a thin plate such as elongated nickel.
[0023]
The upper and lower widths of the circuit board 2 are only slightly smaller than the distance between the upper and lower side walls 21 and 22 of the exterior material 3. When the circuit board 2 is stored in the space 9, the upper and lower side walls of the exterior material 3 The vertical positioning of the circuit board 2 is performed at 21 and 22.
[0024]
The vertical width L1 of the circuit board 2 is larger than the vertical width L2 of the negative electrode lead body 18. Thus, even if the circuit board 2 rattles up and down in the space 9 before the resin material 11 is filled, the upper and lower side walls 21 and 22 of the exterior material 3 are placed before the lead 18 of the negative electrode. , And the short circuit between the negative electrode lead body 18 and the exterior material 3 can be reliably prevented.
[0025]
As shown in FIG. 2, a negative electrode connector 19 for supplying power to a small electronic device protrudes from the front surface of the circuit board 2. The resin material 11 is formed of a synthetic resin such as a polyamide resin, a polyurethane resin, a polycarbonate resin, or an acrylonitrile butadiene styrene resin, and the circuit board 2, the leads 17 and 18, and the negative electrode terminals 14 are formed by the resin material 11. Are insulated and protected. The front end of the negative electrode connector 19 protrudes forward (upward in FIG. 2) from the front surface of the resin material 11.
[0026]
Next, a method for manufacturing the unit cell 1 will be described. In the space 9 of the unit cell 1, the fitting hole 15 of the insulating tape 12 is fitted to the tip of the negative electrode terminal 14 of the unit cell 1, and the insulating tape 12 is arranged on the front surface of the sealing body 8. Further, the distal end portion 18a of the lead 18 of the negative electrode of the circuit board 2 is fitted over the negative electrode terminal 14 of the unit cell 1 by covering the same, and the circuit board 2 is positioned. At this time, the circuit board 2 is housed in the space 9.
[0027]
In this state, the distal end portion 18a of the negative electrode lead body 18 of the circuit board 2 is connected to the negative electrode terminal 14 of the unit cell 1 by spot welding or the like, and the distal end side of the positive electrode lead body 17 is spot welded to the sealing body 8 or the like. Connect with. Thus, the circuit board 2 is fixed to the unit cell 1.
[0028]
Thereafter, the unit cell 1 is mounted in a mold, and a molten synthetic resin is injected into the space 9 of the unit cell 1 and solidified, so that the circuit board 2 and the leads 17 and 18 are covered with the resin material 11. (The state of FIG. 2), and the battery of FIG. 1 is completed.
[0029]
As described above, the circuit board 2 is positioned by fitting the negative electrode lead 18 of the circuit board 2 over the tip of the negative electrode terminal 14 of the unit cell 1 so that the positive and negative electrodes of the circuit board 2 can be positioned. The leads 17 and 18 can be accurately connected to the positive and negative electrodes of the unit cell 1.
[0030]
Further, since the space 9 is provided in the unit cell 1 by using the exterior material 3 of the unit cell 1 and the circuit board 2 is accommodated in the space 9 and filled with the synthetic resin, only the front side surface 2 of the unit cell 1 The circuit board 2 can be covered only by molding the mold with a mold.
[0031]
Instead of bending the lead 18 of the negative electrode of the circuit board 2 into a convex shape and fitting it to the negative terminal 14 of the unit cell 1, a fitting hole is provided in the lead 18 of the negative electrode, May be fitted to the negative electrode terminal 14 of the unit cell 1.
[0032]
In the above embodiment, the circuit board 2 is a COB module, but a discrete module as the circuit board 2 may be accommodated in the space 9 and filled with a synthetic resin.
[Brief description of the drawings]
FIG. 1 is a perspective view of a battery according to the present invention.
FIG. 2 is a sectional view of a main part of a battery.
FIG. 3 is an exploded perspective view of a main part of the battery.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Unit cell 2 Circuit board 3 Exterior material 8 Sealing body 9 Space 11 Resin material 14 Negative terminal 18 of unit cell Negative lead 18a Tip of the negative lead

Claims (5)

開口を有する有底筒状の外装材に電極体を収容した素電池と、この素電池に一体化した回路基板とを有し、
前記外装材の開口が封口体で塞がれており、
前記電極体に電極端子が接続されて、当該電極端子の先端部が前記封口体を貫通しており、
前記回路基板にリード体が接続されて、当該リード体の先端側が前記回路基板から延出している電池において、
前記封口体が、前記外装材の開口面より前記外装材の内方に後退した位置に配置されることで、前記封口体と前記外装材の開口面との間に、前記外装材で囲まれた空間が形成されており、
前記リード体が、前記電極端子の先端部に嵌合可能な形状に形成されており、
前記リード体が前記電極端子の先端部に嵌合し、前記回路基板が前記空間内に収容された状態で、前記空間内が樹脂材で充填されていることを特徴とする電池。A unit cell containing the electrode body in a bottomed cylindrical exterior material having an opening, and a circuit board integrated with the unit cell,
The opening of the exterior material is closed by a sealing body,
An electrode terminal is connected to the electrode body, and a tip end of the electrode terminal penetrates the sealing body,
In a battery, a lead body is connected to the circuit board, and a tip side of the lead body extends from the circuit board.
The sealing body is disposed at a position retracted inward of the exterior material from the opening surface of the exterior material, so that the sealing material is surrounded by the exterior material between the sealing body and the opening surface of the exterior material. Space is formed,
The lead body is formed in a shape that can be fitted to the tip of the electrode terminal,
The battery is characterized in that the space is filled with a resin material in a state in which the lead body is fitted to the tip of the electrode terminal and the circuit board is housed in the space. リード体が、電極端子に覆い被さることで嵌合する形状になっている請求項１記載の電池。The battery according to claim 1, wherein the lead body has a shape that fits by covering the electrode terminal. 外装材が、回路基板の移動を規制している請求項１又は２記載の電池。The battery according to claim 1, wherein the exterior member regulates movement of the circuit board. 回路基板が保護回路を有する請求項１又は２又は３記載の電池。4. The battery according to claim 1, wherein the circuit board has a protection circuit. 回路基板が充電回路を有する請求項１又は２又は３又は４記載の電池。5. The battery according to claim 1, wherein the circuit board has a charging circuit.
JP2003010172A 2003-01-17 2003-01-17 battery Expired - Fee Related JP4162212B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006278333A (en) * 2005-03-25 2006-10-12 Samsung Sdi Co Ltd Polymer battery pack and its manufacturing method
EP1717881A1 (en) * 2005-04-26 2006-11-02 Samsung SDI Co., Ltd. Polymer battery pack and manufacturing method of the same
EP1753053A1 (en) * 2005-07-26 2007-02-14 Samsung SDI Co., Ltd. Rechargeable battery
JP2010135303A (en) * 2008-12-03 2010-06-17 Samsung Sdi Co Ltd Secondary battery

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006278333A (en) * 2005-03-25 2006-10-12 Samsung Sdi Co Ltd Polymer battery pack and its manufacturing method
EP1717881A1 (en) * 2005-04-26 2006-11-02 Samsung SDI Co., Ltd. Polymer battery pack and manufacturing method of the same
JP2006310304A (en) * 2005-04-26 2006-11-09 Samsung Sdi Co Ltd Polymer battery pack and its manufacturing method
JP4728161B2 (en) * 2005-04-26 2011-07-20 三星エスディアイ株式会社 Polymer battery pack and manufacturing method thereof
EP1753053A1 (en) * 2005-07-26 2007-02-14 Samsung SDI Co., Ltd. Rechargeable battery
US7858228B2 (en) 2005-07-26 2010-12-28 Samsung Sdi Co., Ltd. Rechargeable battery
JP2010135303A (en) * 2008-12-03 2010-06-17 Samsung Sdi Co Ltd Secondary battery
US8349488B2 (en) 2008-12-03 2013-01-08 Samsung Sdi Co., Ltd. Secondary battery including a protective circuit board made of metal

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