JP6900319B2 - Battery pack - Google Patents

Battery pack Download PDF

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JP6900319B2
JP6900319B2 JP2017556320A JP2017556320A JP6900319B2 JP 6900319 B2 JP6900319 B2 JP 6900319B2 JP 2017556320 A JP2017556320 A JP 2017556320A JP 2017556320 A JP2017556320 A JP 2017556320A JP 6900319 B2 JP6900319 B2 JP 6900319B2
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circuit board
secondary battery
resin
battery cell
battery pack
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JPWO2017104108A1 (en
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大輔 西田
大輔 西田
文哉 松下
文哉 松下
智嗣 小川
智嗣 小川
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/227—Organic material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Description

本発明は、薄型の二次電池セルと回路基板を同一平面に配置して、一体構造に連結してなる電池パックに関する。 The present invention relates to a battery pack in which a thin secondary battery cell and a circuit board are arranged on the same plane and connected in an integral structure.

ノート型パソコンやスレート型ＰＣ（いわゆるタブレット）など、薄型の携帯機器の普及と共に、その電源として、充放電可能な薄型の二次電池セルを備える電池パックが求められている。二次電池セルを内蔵する電池パックは、保護回路を設け、この保護回路で電池を保護しながら充放電することで、安全性を向上でき、また劣化を防止して寿命を長くできる。このことを実現する電池パックは、保護回路を実装する回路基板を備えている。この電池パックは、薄型の二次電池セルと回路基板とを同一平面に配置して一体構造とすることで全体をコンパクトにできる。 With the widespread use of thin portable devices such as notebook personal computers and slate type PCs (so-called tablets), a battery pack equipped with a thin secondary battery cell that can be charged and discharged is required as a power source for the thin portable device. A battery pack containing a secondary battery cell is provided with a protection circuit, and by charging and discharging the battery while protecting the battery with this protection circuit, safety can be improved, deterioration can be prevented, and the life can be extended. The battery pack that realizes this is provided with a circuit board on which a protection circuit is mounted. This battery pack can be made compact as a whole by arranging a thin secondary battery cell and a circuit board on the same plane to form an integrated structure.

このような電池パックとして、本願出願人は、先に低温成形樹脂で複数の電池セルを繋いだ形状の電池パックを開発した（特許文献１参照）。この電池パックは、対向する二次電池セルの間に、電池の保護回路を実装してなる回路基板を配置し、この回路基板を低温成形樹脂に埋設することで、複数の二次電池セルと回路基板とを一体的に連結しながら回路基板や実装部品を絶縁して保護できる特徴が実現できる。 As such a battery pack, the applicant of the present application has previously developed a battery pack having a shape in which a plurality of battery cells are connected with a low-temperature molding resin (see Patent Document 1). In this battery pack, a circuit board on which a battery protection circuit is mounted is arranged between facing secondary battery cells, and this circuit board is embedded in a low-temperature molding resin to form a plurality of secondary battery cells. It is possible to realize the feature that the circuit board and mounted parts can be insulated and protected while being integrally connected to the circuit board.

ところで、電池パックを収納する携帯機器には、多種多様な形状及び大きさのものがあるため、これ等の携帯機器に装着できるように、電池パックの外形や大きさにも種々の設計変更が求められることがある。例えば、外形の大きな携帯機器に装着される電池パックは、携帯機器の外形に沿うように全体の外形を大きくする構造が求められることがある。このような場合、外形が特定されている二次電池セルではなく、二次電池セルを繋ぐ部分、すなわち、回路基板等を配置する領域を調整することで全体の大きさが調整される。ただ、複数の二次電池セル同士を直接に低温成形樹脂で繋ぐ構造では、樹脂成形された部分が大きくなると、接続部分の機械的強度が不十分となることがある。また、多くの低温成形樹脂が必要となり、コストが高くなるという問題もあった。 By the way, since there are various shapes and sizes of mobile devices for storing battery packs, various design changes are made to the outer shape and size of the battery pack so that they can be attached to these mobile devices. May be required. For example, a battery pack attached to a mobile device having a large outer shape may be required to have a structure in which the overall outer shape is enlarged so as to follow the outer shape of the mobile device. In such a case, the overall size is adjusted by adjusting the portion connecting the secondary battery cells, that is, the area where the circuit board or the like is arranged, instead of the secondary battery cell whose outer shape is specified. However, in a structure in which a plurality of secondary battery cells are directly connected to each other with a low-temperature molding resin, the mechanical strength of the connecting portion may become insufficient when the resin-molded portion becomes large. In addition, there is a problem that a large amount of low-temperature molding resin is required and the cost is high.

特願２０１４−２０１５８３号Japanese Patent Application No. 2014-201583

本発明は、従来のこのような背景に鑑みてなされたものである。本発明の一の目的は、二次電池セルと回路基板とを一体構造としながら、機械的強度を高めた電池パックを提供することにある。
さらに、本発明の他の目的は、簡単かつ容易に種々の外形や大きさに設計変更しながら、しかも多量の低温成形樹脂を使用することなく安価に多量生産できる電池パックを提供することにある。The present invention has been made in view of such a conventional background. One object of the present invention is to provide a battery pack having an integrated structure of a secondary battery cell and a circuit board and enhanced mechanical strength.
Further, another object of the present invention is to provide a battery pack that can be easily and easily redesigned to various outer shapes and sizes, and can be mass-produced at low cost without using a large amount of low-temperature molding resin. ..

上記の目的を達成するため、本発明の電池パックによれば、外形を幅よりも厚さが小さい角型とし、端子面１Ｘを有する薄型の二次電池セル１と、二次電池セル１と電気的に接続され、保護回路を実装した回路基板５と、二次電池セル１と回路基板５を収納するホルダーケース２と、ホルダーケース２に収納された回路基板５をインサート成形してなる樹脂モールド部４とを備えている。ホルダーケース２は、二次電池セル１が配置される電池配置領域２１と、回路基板５が配置される基板配置領域２２とを同一平面に有している。回路基板５は、電池配置領域２１に配置される二次電池セル１の端子面１Ｘに近接するように基板配置領域２２に配置されている。さらに、電池パックは、電池配置領域２１に配置された二次電池セル１の端子面１Ｘの一部または全体と、基板配置領域２２に配置された回路基板５が絶縁成形樹脂に埋設されて樹脂モールド部４が形成されている。
さらにまた、基板配置領域２２は、回路基板５が配置されて、樹脂モールド部４が形成される樹脂成形領域２３と、樹脂モールド部４が形成されない中空領域２４とを備えて、樹脂成形領域２３と中空領域２４とを区画壁３３で区画している。
In order to achieve the above object, according to the battery pack of the present invention, a thin secondary battery cell 1 having a square shape whose outer shape is smaller than the width and having a terminal surface 1X, and a secondary battery cell 1 A resin formed by insert-molding a circuit board 5 electrically connected and equipped with a protection circuit, a holder case 2 for storing a secondary battery cell 1 and a circuit board 5, and a circuit board 5 housed in the holder case 2. It includes a mold portion 4. The holder case 2 has a battery arrangement area 21 in which the secondary battery cell 1 is arranged and a substrate arrangement area 22 in which the circuit board 5 is arranged in the same plane. The circuit board 5 is arranged in the board arrangement area 22 so as to be close to the terminal surface 1X of the secondary battery cell 1 arranged in the battery arrangement area 21. Further, in the battery pack, a part or the whole of the terminal surface 1X of the secondary battery cell 1 arranged in the battery arrangement area 21 and the circuit board 5 arranged in the substrate arrangement area 22 are embedded in the insulating molding resin to form a resin. The mold portion 4 is formed.
Furthermore, the substrate arrangement region 22 includes a resin molding region 23 in which the circuit board 5 is arranged and the resin mold portion 4 is formed, and a hollow region 24 in which the resin mold portion 4 is not formed. And the hollow region 24 are partitioned by a partition wall 33.

上記構成により、ホルダーケースの定位置に二次電池セルと回路基板とを収納して固定することで、二次電池セルと回路基板とを同一平面に配置しながら一体構造として、機械的強度を高めることができる。とくに、電池パックの外郭全体をホルダーケースで保護することで、高い外装強度を実現して、落下や曲げに対する強度を高くできる。さらに、ホルダーケースの設計時においては、電池配置領域と基板配置領域の配置や基板配置領域の大きさを調整することで、ホルダーケースの外形を種々に変更して、電池パックが装着される電子機器への対応を容易にできる。
さらに、基板配置領域を区画壁で区画して、樹脂モールド部が形成される樹脂成形領域を設けることで、絶縁成形樹脂の使用量を少なくして製造コストを低減できる。また、樹
脂モールド部が形成されない領域を中空とすることで全体を軽量にできる。
With the above configuration, the secondary battery cell and the circuit board are housed and fixed in a fixed position of the holder case, so that the secondary battery cell and the circuit board are arranged on the same plane as an integrated structure, and the mechanical strength is increased. Can be enhanced. In particular, by protecting the entire outer shell of the battery pack with a holder case, high exterior strength can be realized and the strength against dropping and bending can be increased. Further, when designing the holder case, the outer shape of the holder case can be variously changed by adjusting the arrangement of the battery arrangement area and the substrate arrangement area and the size of the substrate arrangement area, and the electronic device to which the battery pack is mounted can be changed. It can be easily supported by devices.
Further, by partitioning the substrate arrangement region by the partition wall and providing the resin molding region in which the resin mold portion is formed, the amount of the insulating molding resin used can be reduced and the manufacturing cost can be reduced. Also, the tree
By making the area where the fat mold portion is not formed hollow, the whole can be made lighter.

さらに、この電池パックは、絶縁成形樹脂を使用して回路基板を封止することで、回路基板に実装された電子部品を樹脂モールドして確実に絶縁できる。また、二次電池セルと回路基板との接続部分を樹脂モールドすることで、これ等の連結強度を高めて、落下等の衝撃による断線等を有効に防止できる。さらにまた、電池パックの製造工程においては、電子部品が実装された回路基板と二次電池セルとをホルダーケースに収納することで、全てのパーツを定位置に配置しながら固定できるので、組み立て手間を簡単にして製造コスを低減できる特徴も実現する。以上のように、本発明の電池パックは、ホルダーケースと樹脂モールド部を組み合わせることで、ホルダーケースによる仕様と、絶縁成形樹脂の仕様の特長を生かした理想的な電池パックが実現できる。 Further, in this battery pack, by sealing the circuit board with an insulating molding resin, the electronic components mounted on the circuit board can be resin-molded and reliably insulated. Further, by resin-molding the connection portion between the secondary battery cell and the circuit board, it is possible to increase the connection strength of these parts and effectively prevent disconnection due to impact such as dropping. Furthermore, in the battery pack manufacturing process, by storing the circuit board on which the electronic components are mounted and the secondary battery cell in the holder case, all the parts can be fixed while being placed in place, which is troublesome to assemble. It also realizes the feature that can reduce the manufacturing cost by simplifying. As described above, the battery pack of the present invention can realize an ideal battery pack that makes the best use of the specifications of the holder case and the specifications of the insulating molded resin by combining the holder case and the resin mold portion.

本発明の電池パックは、二次電池セル１を複数備えて、ホルダーケース２の両端部に電池配置領域２１を配置すると共に、対向する電池配置領域２１の間に基板配置領域２２を配置することができる。上記構成により、複数の二次電池セルと回路基板とを同一平面に配置しながら、これ等を強固に連結できる。 The battery pack of the present invention includes a plurality of secondary battery cells 1, and arranges battery arrangement areas 21 at both ends of the holder case 2 and arranges substrate arrangement areas 22 between facing battery arrangement areas 21. Can be done. With the above configuration, it is possible to firmly connect the plurality of secondary battery cells and the circuit board while arranging them on the same plane.

本発明の電池パックは、電池配置領域２１が、二次電池セル１を収納するフレーム部２７を二次電池セル１の外周に沿って備えて、フレーム部２７と二次電池セル１とを外装シート８で被覆することができる。上記構成により、二次電池セルの露出部を外装シートで被覆して保護しながら、フレーム部と二次電池セルとを外装シートで強固に連結できる。 In the battery pack of the present invention, the battery arrangement area 21 includes a frame portion 27 for accommodating the secondary battery cell 1 along the outer circumference of the secondary battery cell 1, and the frame portion 27 and the secondary battery cell 1 are externally provided. It can be coated with the sheet 8. With the above configuration, the frame portion and the secondary battery cell can be firmly connected by the exterior sheet while the exposed portion of the secondary battery cell is covered with the exterior sheet to protect it.

本発明の電池パックは、基板配置領域２２に、絶縁成形樹脂を注入するための樹脂注入ガイド２９を形成することができる。上記構成により、樹脂注入ガイドを設ける位置を調整することで、樹脂モールド部を樹脂成形する際に、溶融樹脂の流動方向を特定しながら注入できる。 In the battery pack of the present invention, a resin injection guide 29 for injecting an insulating molding resin can be formed in the substrate arrangement region 22. With the above configuration, by adjusting the position where the resin injection guide is provided, it is possible to inject the molten resin while specifying the flow direction when the resin mold portion is resin-molded.

本発明の電池ックは、樹脂モールド部４の表面に、複数列の溝部４１を形成することができる。上記構成により、絶縁成形樹脂の使用量を少なくして製造コストを低減できる。また、樹脂モールド部の表面に設けた複数列の溝部によって表面積を広くできるので、樹脂モールド部に埋設される電子部品の発熱を効果的に放熱できる。この構造は、樹脂モールド部のみで二次電池セルを繋ぐ従来の電池セルでは、強度が低下するために実現が難しかった構造であるが、本発明では、ホルダーケースにより電池パックの強度を確保できるため、樹脂モールド部に溝部を設けても強度低下を懸念することなく、樹脂モールド部の放熱特性の向上とコストダウンの両方を実現できる。 In the battery rack of the present invention, a plurality of rows of groove portions 41 can be formed on the surface of the resin mold portion 4. With the above configuration, the amount of the insulating molding resin used can be reduced and the manufacturing cost can be reduced. Further, since the surface area can be increased by the plurality of rows of grooves provided on the surface of the resin mold portion, the heat generated by the electronic components embedded in the resin mold portion can be effectively dissipated. This structure is difficult to realize in the conventional battery cell in which the secondary battery cell is connected only by the resin mold portion because the strength is lowered, but in the present invention, the strength of the battery pack can be ensured by the holder case. Therefore, even if the groove portion is provided in the resin mold portion, both the improvement of the heat dissipation characteristics of the resin mold portion and the cost reduction can be realized without worrying about the decrease in strength.

本発明の電池パックは、複数列の溝部４１を、樹脂モールド部４にインサートされる回路基板５の長手方向に沿って互いに平行に形成することができる。上記構成により、絶縁成形樹脂の注入時においては、樹脂モールド部の表面に複数列の溝を平行に形成するために成形金型に設けた凸条に沿って、溶融状態にある絶縁成形樹脂をスムーズに流動できる。このため、注入される溶融状態の絶縁成形樹脂を、長手方向に延在する回路基板に沿って成形室の奥部まで速やかに、かつ確実に注入できる。 In the battery pack of the present invention, a plurality of rows of groove portions 41 can be formed parallel to each other along the longitudinal direction of the circuit board 5 inserted into the resin mold portion 4. With the above configuration, when the insulating molding resin is injected, the insulating molding resin in a molten state is formed along the ridges provided in the molding die in order to form a plurality of rows of grooves in parallel on the surface of the resin mold portion. It can flow smoothly. Therefore, the molten insulating molding resin to be injected can be quickly and surely injected to the inner part of the molding chamber along the circuit board extending in the longitudinal direction.

本発明の電池パックは、ホルダーケース２を、耐熱温度を７０℃以上とする樹脂で成形し、樹脂モールド部４を形成する絶縁成形樹脂を、７０℃以下において溶融状態にある熱可塑性樹脂とすることができる。上記構成により、溶融状態にある熱可塑性樹脂がホルダーケースに悪影響を及ぼすのを有効に防止できる。 In the battery pack of the present invention, the holder case 2 is molded with a resin having a heat resistant temperature of 70 ° C. or higher, and the insulating molded resin forming the resin molded portion 4 is a thermoplastic resin that is in a molten state at 70 ° C. or lower. be able to. With the above configuration, it is possible to effectively prevent the molten thermoplastic resin from adversely affecting the holder case.

本発明の一実施形態に係る電池パックの斜視図である。It is a perspective view of the battery pack which concerns on one Embodiment of this invention. 図１に示す電池パックを上下反転した斜視図である。It is a perspective view which turned upside down the battery pack shown in FIG. 図２に示す電池パックのＩＩＩ−ＩＩＩ線断面図である。FIG. 3 is a cross-sectional view taken along the line III-III of the battery pack shown in FIG. 図２に示す電池パックのＩＶ−ＩＶ線断面図である。FIG. 2 is a sectional view taken along line IV-IV of the battery pack shown in FIG. 図２に示す電池パックの分解斜視図である。It is an exploded perspective view of the battery pack shown in FIG. ホルダーケースに二次電池セルと回路基板と引出線をセットした状態を示す平面図である。It is a top view which shows the state which set the secondary battery cell, a circuit board, and a leader wire in a holder case. 二次電池セルの一例を示す拡大斜視図である。It is an enlarged perspective view which shows an example of a secondary battery cell. 図６に示すホルダーケースのＶＩＩＩ−ＶＩＩＩ線断面図である。FIG. 6 is a sectional view taken along line VIII-VIII of the holder case shown in FIG. 図６に示すホルダーケースの回路基板と二次電池セルの接続部分を示す拡大斜視図である。FIG. 6 is an enlarged perspective view showing a connection portion between the circuit board of the holder case shown in FIG. 6 and the secondary battery cell. 回路基板と保護素子の連結構造を示す拡大断面図である。It is an enlarged cross-sectional view which shows the connection structure of a circuit board and a protection element. 引出線と回路基板との連結構造を示す拡大平面図である。It is an enlarged plan view which shows the connection structure of a leader line and a circuit board. 図１１に示す位置決め機構のＸＩＩ−ＸＩＩ線断面図である。FIG. 11 is a cross-sectional view taken along the line XII-XII of the positioning mechanism shown in FIG. 位置決め機構の拡大斜視図である。It is an enlarged perspective view of a positioning mechanism. 本発明の他の実施形態に係る電池パックの斜視図である。It is a perspective view of the battery pack which concerns on other embodiment of this invention. 本発明の他の実施形態に係る電池パックの斜視図である。It is a perspective view of the battery pack which concerns on other embodiment of this invention.

本発明の一実施形態に係る電池パックを図１〜図６に示す。これ等の図に示す電池パックは、主としてノート型パソコンやタブレット等の薄型の携帯電子機器に装着されて、これ等の機器の電源として使用される。ただ、本発明の電池パックは、薄型の携帯電子機器以外の電気機器に装着して、電源として使用することもできる。 The battery pack according to the embodiment of the present invention is shown in FIGS. 1 to 6. The battery packs shown in these figures are mainly attached to thin portable electronic devices such as notebook personal computers and tablets, and are used as a power source for these devices. However, the battery pack of the present invention can be attached to an electric device other than a thin portable electronic device and used as a power source.

図１〜図６に示す電池パック１００は、薄型の二次電池セル１と、二次電池セル１と電気的に接続され、保護回路を実装した回路基板５と、二次電池セル１と回路基板５を収納するホルダーケース２と、ホルダーケース２に収納された回路基板５をインサート成形してなる樹脂モールド部４とを備えている。図に示す電池パック１００は、２個の二次電池セル１を備えており、これ等の二次電池セル１を対向する姿勢でホルダーケース２の両端部に配置すると共に、対向する二次電池セル１の間に回路基板５を配置して、二次電池セル１と回路基板５とを略同一平面に配置している。（二次電池セル１） The battery pack 100 shown in FIGS. 1 to 6 is a circuit board 5 which is electrically connected to a thin secondary battery cell 1 and a secondary battery cell 1 and has a protection circuit mounted therein, and a secondary battery cell 1 and a circuit. It includes a holder case 2 for accommodating the substrate 5, and a resin mold portion 4 formed by insert-molding the circuit board 5 housed in the holder case 2. The battery pack 100 shown in the figure includes two secondary battery cells 1, and these secondary battery cells 1 are arranged at both ends of the holder case 2 in a facing position, and the secondary batteries facing each other are arranged. The circuit board 5 is arranged between the cells 1, and the secondary battery cell 1 and the circuit board 5 are arranged on substantially the same plane. (Secondary battery cell 1)

二次電池セル１は、幅よりも厚さが小さい外形であって、全体を薄い形状の角型電池としている。二次電池セル１は、図７に示すように、一面を開口した有底筒状の金属製の外装缶１１と、この外装缶１１の開口を閉塞する封口板１２とを備えている。外装缶１１の開口部は、金属板をプレス加工した平板状の封口板１２により、レーザー溶接でもって密封されている。図に示す二次電池セル１は、外装缶１１の両側を湾曲面としている。ただし、薄型の二次電池セルには、角形電池のみでなく、プラスチック製の外装フィルムの内部に電極を配置しているラミネート電池も使用できる。薄型の二次電池セル１は、厚さ３ｍｍ〜１０ｍｍのリチウムイオン二次電池である。ただし、二次電池セルは、リチウムイオン二次電池以外の非水系電解液二次電池や、ニッケル−水素電池等の充電できる他の全ての二次電池とすることができる。二次電池セル１をリチウムイオン二次電池とする電池パック１００は、全体の電池容量を大きくできる。 The secondary battery cell 1 has an outer shape smaller than the width and a thickness, and is a square battery having a thin shape as a whole. As shown in FIG. 7, the secondary battery cell 1 includes a bottomed tubular metal outer can 11 having an opening on one side, and a sealing plate 12 that closes the opening of the outer can 11. The opening of the outer can 11 is sealed by laser welding with a flat plate-shaped sealing plate 12 obtained by pressing a metal plate. The secondary battery cell 1 shown in the figure has curved surfaces on both sides of the outer can 11. However, as the thin secondary battery cell, not only a square battery but also a laminated battery in which electrodes are arranged inside a plastic exterior film can be used. The thin secondary battery cell 1 is a lithium ion secondary battery having a thickness of 3 mm to 10 mm. However, the secondary battery cell can be a non-aqueous electrolyte secondary battery other than the lithium ion secondary battery, or any other rechargeable secondary battery such as a nickel-hydrogen battery. The battery pack 100 in which the secondary battery cell 1 is a lithium ion secondary battery can increase the overall battery capacity.

二次電池セル１は、封口板１２を端子面１Ｘとして、この端子面１Ｘに正負の電極１０を設けている。図７に示す二次電池セル１は、封口板１２の中央部に、封口板１２と絶縁された凸部電極１３を設けている。この二次電池セル１は、封口板１２に設けた凸部電極１３を第１の電極１０Ａとし、封口板１２を第２の電極１０Ｂとして端子面１Ｘに正負の電極１０を設けている。図の二次電池セル１は、封口板１２の一方の端部にクラッド板１４を固定して、第２の電極１０Ｂを形成している。この二次電池セル１は、クラッド板１４を介して接続リード板１６を確実に接続できる。なお、図に示す二次電池セル１では、凸部電極１３（第１の電極１０Ａ）が負極となり、封口板１２及びクラッド板１４（第２の電極１０Ｂ）が正極となる。 The secondary battery cell 1 has a sealing plate 12 as a terminal surface 1X, and positive and negative electrodes 10 are provided on the terminal surface 1X. The secondary battery cell 1 shown in FIG. 7 is provided with a convex electrode 13 insulated from the sealing plate 12 at the center of the sealing plate 12. In the secondary battery cell 1, the convex electrode 13 provided on the sealing plate 12 is used as the first electrode 10A, and the sealing plate 12 is used as the second electrode 10B, and positive and negative electrodes 10 are provided on the terminal surface 1X. In the secondary battery cell 1 in the figure, the clad plate 14 is fixed to one end of the sealing plate 12 to form the second electrode 10B. The secondary battery cell 1 can reliably connect the connection lead plate 16 via the clad plate 14. In the secondary battery cell 1 shown in the figure, the convex electrode 13 (first electrode 10A) serves as a negative electrode, and the sealing plate 12 and the clad plate 14 (second electrode 10B) serve as a positive electrode.

さらに、二次電池セル１は、封口板１２に安全弁１５を設けている。安全弁１５は、電池の内圧が設定圧力よりも高くなるときに開弁して、内部のガス等を排出して、内圧上昇を防止する。ただ、二次電池セルの安全弁は、外装缶に設けてもよい。この場合、封口板を樹脂モールド部で埋設する電池パックは、内部のガス等の排出を外装缶の側面から容易に行うことができる。 Further, the secondary battery cell 1 is provided with a safety valve 15 on the sealing plate 12. The safety valve 15 opens when the internal pressure of the battery becomes higher than the set pressure to discharge the internal gas or the like to prevent the internal pressure from rising. However, the safety valve of the secondary battery cell may be provided in the outer can. In this case, the battery pack in which the sealing plate is embedded in the resin mold portion can easily discharge the gas or the like inside from the side surface of the outer can.

さらに、二次電池セル１は、端子面１Ｘに設けた正負の電極１０に、通電のための接続リード板１６を接続している。二次電池セル１は、第１の電極１０Ａである凸部電極１３に接続された第１接続リード板１６Ａと、第２の電極１０Ｂである封口板１２に接続された第２接続リード板１６Ｂを介して回路基板５に接続される。図に示す電池パック１００は、２個の二次電池セル１を回路基板５に接続している。２個の二次電池セル１は、回路基板５上において直列に接続されている。 Further, in the secondary battery cell 1, a connection lead plate 16 for energization is connected to positive and negative electrodes 10 provided on the terminal surface 1X. The secondary battery cell 1 has a first connection lead plate 16A connected to a convex electrode 13 which is a first electrode 10A, and a second connection lead plate 16B connected to a sealing plate 12 which is a second electrode 10B. It is connected to the circuit board 5 via. In the battery pack 100 shown in the figure, two secondary battery cells 1 are connected to the circuit board 5. The two secondary battery cells 1 are connected in series on the circuit board 5.

（回路基板５）
回路基板５は、二次電池セル１の保護回路などを実現する電子部品を実装している。保護回路は、二次電池セル１の温度、電圧、電流などを検出して、充放電の電流をコントロールする。このことを実現する保護回路は、二次電池セル１の電圧を検出する電圧検出回路（図示せず）と、電流を検出する電流検出回路（図示せず）と、二次電池セル１の温度を検出する温度センサ（図示せず）と、二次電池セル１の充放電電流をコントロールするＦＥＴなどの半導体スイッチング素子（図示せず）と、二次電池セル１の温度や過電流を検出して動作する電流遮断素子等の保護素子７とを実装している。回路基板５への保護素子７の実装及びその接続の詳細については後述する。(Circuit board 5)
The circuit board 5 is equipped with electronic components that realize a protection circuit for the secondary battery cell 1 and the like. The protection circuit detects the temperature, voltage, current, etc. of the secondary battery cell 1 and controls the charging / discharging current. The protection circuit that realizes this is a voltage detection circuit (not shown) that detects the voltage of the secondary battery cell 1, a current detection circuit (not shown) that detects the current, and the temperature of the secondary battery cell 1. (Not shown), a semiconductor switching element (not shown) such as an FET that controls the charge / discharge current of the secondary battery cell 1, and the temperature and overcurrent of the secondary battery cell 1 are detected. A protection element 7 such as a current cutoff element that operates in the same manner is mounted. Details of mounting the protective element 7 on the circuit board 5 and connecting the protective element 7 to the circuit board 5 will be described later.

回路基板５は、エポキシ樹脂製とすることができる。本発明の電池パックでは、ホルダーケース２により全体の強度を高めることができるので、回路基板５には、ガラス繊維等の補強繊維で補強された樹脂を使用することなく低コストに製造できる。ただ、ガラス繊維等で補強されたエポキシ樹脂で製造することもできる。ホルダーケース２に配置される回路基板５は、電池パックに要求される外形や大きさに応じて、その形状や大きさ、及びホルダーケースに配置される姿勢等が決定される。回路基板は、詳細には後述するが、ホルダーケースに形成される基板収納部に配置できる外形となるように形成される。 The circuit board 5 can be made of epoxy resin. In the battery pack of the present invention, the overall strength can be increased by the holder case 2, so that the circuit board 5 can be manufactured at low cost without using a resin reinforced with reinforcing fibers such as glass fibers. However, it can also be manufactured with an epoxy resin reinforced with glass fiber or the like. The shape and size of the circuit board 5 arranged in the holder case 2 and the posture in which the circuit board 5 is arranged in the holder case are determined according to the outer shape and size required for the battery pack. Although the circuit board will be described in detail later, the circuit board is formed so as to have an outer shape that can be arranged in the board storage portion formed in the holder case.

（ホルダーケース２）
ホルダーケース２は、二次電池セル１と回路基板５とを収納して定位置に配置している。ホルダーケース２は、薄型の二次電池セル１と回路基板５とを同一平面に配置できるように、全体を薄い板状であって、片側面（図２〜図６では上面）に二次電池セル１や回路基板５を収納できる収納開口を有する形状に樹脂で成形している。ホルダーケース２は、樹脂モールド部４を成形する樹脂とは異なる樹脂製であって、好ましくは耐熱性と強度に優れた樹脂、例えば、ポリカーボネートやＡＢＳ等の樹脂で成形される。これ等の樹脂で成形されるホルダーケース２は、耐熱温度を７０℃以上としながら、外形の寸法精度を高めることができる。(Holder case 2)
The holder case 2 houses the secondary battery cell 1 and the circuit board 5 and arranges them in a fixed position. The holder case 2 has a thin plate shape as a whole so that the thin secondary battery cell 1 and the circuit board 5 can be arranged on the same plane, and the secondary battery is on one side surface (upper surface in FIGS. 2 to 6). It is molded with resin into a shape having a storage opening that can store the cell 1 and the circuit board 5. The holder case 2 is made of a resin different from the resin for molding the resin mold portion 4, and is preferably molded with a resin having excellent heat resistance and strength, for example, a resin such as polycarbonate or ABS. The holder case 2 molded of these resins can improve the dimensional accuracy of the outer shape while keeping the heat resistant temperature at 70 ° C. or higher.

ホルダーケース２は、二次電池セル１が配置される電池配置領域２１と、回路基板５が配置される基板配置領域２２とを同一平面に有している。図６に示すホルダーケース２は、２個の二次電池セル１を収納できるように、両端部に電池配置領域２１を設けて、対向する電池配置領域２１の間に基板配置領域２２を設けている。このように、電池配置領域２１と基板配置領域２２を有するホルダーケース２は、基板配置領域２２の大きさを調整することで、ホルダーケース２の外形を容易に変更できる。例えば、二次電池セル１はその規格や容量によりその外形が特定されるため、電池配置領域２１における大きさ等の設計変更は難しいが、基板配置領域２２は高い自由度で設計変形が可能である。したがって、このホルダーケース２は、電池パックに要求される外形を実現するために基板配置領域２２を最適な大きさや形状に設計変形することで、電子機器への対応を容易にできる。さらに、複数の二次電池セルを備える電池パックにおいては、収納する二次電池セルの個数や、電池配置領域と基板配置領域の配置を調整することによっても、ホルダーケースの外形を容易に変更して、電池パックが装着される電子機器への対応を容易にできる。 The holder case 2 has a battery arrangement area 21 in which the secondary battery cell 1 is arranged and a substrate arrangement area 22 in which the circuit board 5 is arranged in the same plane. The holder case 2 shown in FIG. 6 is provided with battery arrangement areas 21 at both ends so that two secondary battery cells 1 can be stored, and a substrate arrangement area 22 is provided between the opposite battery arrangement areas 21. There is. As described above, in the holder case 2 having the battery arrangement area 21 and the substrate arrangement area 22, the outer shape of the holder case 2 can be easily changed by adjusting the size of the substrate arrangement area 22. For example, since the outer shape of the secondary battery cell 1 is specified by its standard and capacity, it is difficult to change the design such as the size in the battery arrangement area 21, but the board arrangement area 22 can be redesigned with a high degree of freedom. is there. Therefore, the holder case 2 can be easily adapted to electronic devices by designing and deforming the substrate arrangement area 22 to an optimum size and shape in order to realize the outer shape required for the battery pack. Further, in a battery pack having a plurality of secondary battery cells, the outer shape of the holder case can be easily changed by adjusting the number of secondary battery cells to be stored and the arrangement of the battery arrangement area and the substrate arrangement area. Therefore, it is possible to easily support electronic devices to which a battery pack is mounted.

図６に示すホルダーケース２は、全体の外形を一方向に延在された矩形状としている。このホルダーケース２は、長手方向の両端部に電池配置領域２１を形成すると共に、中間に形成される基板配置領域２２を長手方向に延在された形状として、ホルダーケース２の全長を調整している。この基板配置領域２２には、対向して配置される二次電池セル１の端子面１Ｘに回路基板５の両端が近接するように、長手方向に延在された回路基板５が配置される。 The holder case 2 shown in FIG. 6 has a rectangular shape extending in one direction as a whole. In this holder case 2, the battery arrangement areas 21 are formed at both ends in the longitudinal direction, and the substrate arrangement area 22 formed in the middle is formed to extend in the longitudinal direction, and the total length of the holder case 2 is adjusted. There is. In the board arrangement area 22, a circuit board 5 extending in the longitudinal direction is arranged so that both ends of the circuit board 5 are close to the terminal surfaces 1X of the secondary battery cells 1 arranged so as to face each other.

ここで、ホルダーケース２の外形を調整するために、面積を広くする基板配置領域２２においては、配置される回路基板５や樹脂モールド部４を小さくしてコストを下げることが求められる。このことを実現するために、図６に示すホルダーケース２は、基板配置領域２２を、回路基板５が配置されて樹脂モールド部４が成形される樹脂成形領域２３と、樹脂モールド部４が成形されない中空領域２４とに区画している。図に示すホルダーケース２は、基板配置領域２２の中央部であって、対向する二次電池セル１の端子面１Ｘの中央部を繋ぐ領域を樹脂成形領域２３とし、樹脂成形領域２３の両側を中空領域２４としている。樹脂成形領域２３と中空領域２４は、区画壁３３で区画されている。図のホルダーケース２は、基板収納領域２２の中央部に、長手方向に沿って一対の区画壁３３を設けており、対向する区画壁３３の間に回路基板５を収納する基板収納部２６を形成している。 Here, in order to adjust the outer shape of the holder case 2, it is required to reduce the cost by reducing the size of the circuit board 5 and the resin mold portion 4 to be arranged in the substrate arrangement area 22 in which the area is widened. In order to realize this, in the holder case 2 shown in FIG. 6, the substrate arrangement region 22 is formed by molding the resin molding region 23 in which the circuit board 5 is arranged and the resin mold portion 4 is formed, and the resin mold portion 4. It is partitioned into a hollow region 24 that is not used. In the holder case 2 shown in the figure, the central portion of the substrate arrangement region 22, the region connecting the central portions of the terminal surfaces 1X of the facing secondary battery cells 1 is set as the resin molding region 23, and both sides of the resin molding region 23 are designated as the resin molding region 23. The hollow region 24 is used. The resin molding region 23 and the hollow region 24 are partitioned by a partition wall 33. In the holder case 2 shown in the figure, a pair of partition walls 33 are provided in the central portion of the substrate storage area 22 along the longitudinal direction, and a substrate storage portion 26 for storing the circuit board 5 is provided between the opposing partition walls 33. Is forming.

中空領域２４は、格子状に縦横に交差する複数の補強リブ３４を設けて、全体を複数の中空室２８に分割して補強している。このように、基板配置領域２２に中空領域２４を設けて、複数の中空室２８を設ける構造は、ホルダーケース２を軽量にしながら、使用する絶縁成形樹脂を少なくして製造コストを低減できる。図６のホルダーケース２は、基板配置領域２２の両側に中空部２４を設けているが、ホルダーケースは、要求される外形に応じて、中空部の配置や形状、大きさ等を種々に変更できる。ただ、ホルダーケースは、必ずしも基板配置領域に中空領域を設ける必要はなく、基板配置領域全体を基板収納部とすることもできる。例えば、基板配置領域を、全長を短くして幅方向（ホルダーケースの短手方向）に長くする構造においては、中空領域を設けることなく、対向する二次電池セルの間に、短手方向に延在する回路基板を収納する基板収納部を設けることもできる。 The hollow region 24 is provided with a plurality of reinforcing ribs 34 that intersect vertically and horizontally in a grid pattern, and the entire hollow region 24 is divided into a plurality of hollow chambers 28 for reinforcement. In this way, the structure in which the hollow region 24 is provided in the substrate arrangement region 22 and the plurality of hollow chambers 28 are provided can reduce the manufacturing cost by reducing the amount of the insulating molding resin used while making the holder case 2 lightweight. The holder case 2 of FIG. 6 is provided with hollow portions 24 on both sides of the substrate arrangement region 22, but the holder case is variously changed in arrangement, shape, size, etc. of the hollow portions according to the required outer shape. it can. However, the holder case does not necessarily have to be provided with a hollow region in the substrate arrangement region, and the entire substrate arrangement region can be used as the substrate storage portion. For example, in a structure in which the substrate arrangement area is shortened in the overall length and lengthened in the width direction (the lateral direction of the holder case), the hollow region is not provided and the substrate is placed between the opposing secondary battery cells in the lateral direction. It is also possible to provide a board storage unit for storing the extending circuit board.

図３〜図６に示すホルダーケース２は、矩形状の外周に沿って周壁３０を設けて、内側に二次電池セル１を収納する電池収納部２５と回路基板５を収納する基板収納部２６とを設けている。ホルダーケース２は、図３に示すように、基板配置領域２２の底面となる底面プレート３２を電池配置領域２１の底面となる表面プレート３１よりも高くなる段差構造として、回路基板５が配置される基板収納部２６を電池収納部２５よりも浅く成形している。この構造は、回路基板５をインサート成形する樹脂モールド部４を薄く成形して使用する絶縁成形樹脂の量を少なくできる。さらに、図に示すホルダーケース２は、外周に設けた周壁３０から外側に突出する複数の突出片３８を一体成形して設けている。この突出片３８は、電池パック１００が装着される電子機器に連結するための連結部として使用される。 In the holder case 2 shown in FIGS. 3 to 6, a peripheral wall 30 is provided along the outer circumference of the rectangular shape, and a battery storage portion 25 for accommodating the secondary battery cell 1 and a substrate storage portion 26 for accommodating the circuit board 5 are provided inside. And are provided. As shown in FIG. 3, in the holder case 2, the circuit board 5 is arranged as a stepped structure in which the bottom plate 32, which is the bottom surface of the substrate arrangement area 22, is higher than the surface plate 31 which is the bottom surface of the battery arrangement area 21. The substrate storage portion 26 is formed shallower than the battery storage portion 25. With this structure, the amount of the insulating molding resin used by thinly molding the resin molding portion 4 for insert molding the circuit board 5 can be reduced. Further, the holder case 2 shown in the figure is provided by integrally molding a plurality of projecting pieces 38 projecting outward from the peripheral wall 30 provided on the outer periphery. The protruding piece 38 is used as a connecting portion for connecting to an electronic device to which the battery pack 100 is mounted.

ホルダーケース２は、電池配置領域２１に、二次電池セル１の外形に沿うフレーム部２７を備えており、このフレーム部２７の内側を電池収納部２５としている。フレーム部２７は、二次電池セル１の端子面１Ｘに沿う保持壁３５と、端子面１Ｘを除く３辺に沿う周壁３０と、二次電池セル１の一方の主面１Ａに沿う表面プレート部３１とを備えている。保持壁３５は、図５に示すように、基板収納部２６と対向する部分をカットして、電池収納部２５と基板収納部２６とを連通させている。表面プレート部３１は、中央部を開口して、二次電池セル１の主面１Ａの外周縁部に沿う四角いリング形状としている。フレーム部２７の周壁３０の高さは、二次電池セル１の厚さとほぼ等しくして、電池収納部２５に二次電池セル１を収納できるようにしている。フレーム部２７の内形は、二次電池セル１の外形とほぼ等しくして、ここに収納される二次電池セル１を定位置に配置できるようにしている。二次電池セル１は、一対の電極１０を設けた端子面１Ｘが基板配置部２２と対向する姿勢となるようにフレーム部２７に収納される。 The holder case 2 is provided with a frame portion 27 along the outer shape of the secondary battery cell 1 in the battery arrangement region 21, and the inside of the frame portion 27 is a battery storage portion 25. The frame portion 27 includes a holding wall 35 along the terminal surface 1X of the secondary battery cell 1, a peripheral wall 30 along the three sides excluding the terminal surface 1X, and a surface plate portion along one main surface 1A of the secondary battery cell 1. It has 31 and. As shown in FIG. 5, the holding wall 35 has a portion facing the substrate accommodating portion 26 cut so that the battery accommodating portion 25 and the substrate accommodating portion 26 communicate with each other. The surface plate portion 31 has a square ring shape along the outer peripheral edge portion of the main surface 1A of the secondary battery cell 1 with the central portion opened. The height of the peripheral wall 30 of the frame portion 27 is substantially equal to the thickness of the secondary battery cell 1, so that the secondary battery cell 1 can be stored in the battery storage portion 25. The inner shape of the frame portion 27 is substantially equal to the outer shape of the secondary battery cell 1, so that the secondary battery cell 1 housed therein can be arranged at a fixed position. The secondary battery cell 1 is housed in the frame portion 27 so that the terminal surface 1X provided with the pair of electrodes 10 faces the substrate arrangement portion 22.

基板収納部２６は、図８に示すように、対向する一対の区画壁３３と底面プレート３２とで囲まれた空間に形成される。この基板収納部２６は、回路基板５が配置されると共に、溶融された絶縁成形樹脂が内部に充填されて樹脂モールド部４が成形される。図８の基板収納部２６は、連結機構１９を介して回路基板５を定位置に固定している。図に示す連結機構１９は、ホルダーケース２に設けられて回路基板５の両側縁部を係止する係止リブ３６及び係止フック３７と、回路基板５に設けた係止部５６とで構成している。ホルダーケース２は、一方の区画壁３３（図８において右側）に、係止リブ３６として、基板収納部２６の内側に突出する垂直リブ３６ａと水平リブ３６ｂとを設けると共に、この区画壁３３と対向する側に位置して、底面プレート３２から突出する係止フック３７を設けている。水平リブ３６ｂは水平方向に配置されており、底面プレート３２との間に回路基板５の側縁部を挿入できるようにしている。回路基板５は、図５に示すように、係止部５６として、垂直リブ３６ａと対向する位置にスリット凹部５６ａを設けると共に、係止フック３７と対向する位置には係止凹部５６ｂを設けている。この連結機構１９は、スリット凹部５６ａに垂直リブ３６ａを案内して回路基板５の左右方向の位置を特定する。さらに、連結機構１９は、水平リブ３６ｂと底面プレート３２の間に回路基板５の一方の側縁部を挿入すると共に、回路基板５の反対側の側縁部に設けた係止凹部５６ｂに係止フック３７のフック部を係止させて回路基板５を抜けないように定位置に固定する。 As shown in FIG. 8, the substrate storage portion 26 is formed in a space surrounded by a pair of partition walls 33 facing each other and a bottom plate 32. In the substrate storage portion 26, the circuit board 5 is arranged, and the molten insulating molding resin is filled inside to mold the resin mold portion 4. The board accommodating portion 26 of FIG. 8 fixes the circuit board 5 in a fixed position via the connecting mechanism 19. The connecting mechanism 19 shown in the figure includes a locking rib 36 and a locking hook 37 provided on the holder case 2 to lock both side edges of the circuit board 5, and a locking portion 56 provided on the circuit board 5. doing. The holder case 2 is provided with vertical ribs 36a and horizontal ribs 36b protruding inward of the substrate storage portion 26 as locking ribs 36 on one partition wall 33 (right side in FIG. 8), and the partition wall 33 and the partition wall 33. A locking hook 37 that is located on the opposite side and projects from the bottom plate 32 is provided. The horizontal ribs 36b are arranged in the horizontal direction so that the side edge portion of the circuit board 5 can be inserted between the horizontal ribs 36b and the bottom plate 32. As shown in FIG. 5, the circuit board 5 is provided with a slit recess 56a at a position facing the vertical rib 36a and a locking recess 56b at a position facing the locking hook 37 as the locking portion 56. There is. The connecting mechanism 19 guides the vertical rib 36a to the slit recess 56a to specify the position of the circuit board 5 in the left-right direction. Further, the connecting mechanism 19 inserts one side edge portion of the circuit board 5 between the horizontal rib 36b and the bottom plate 32, and engages with the locking recess 56b provided on the side edge portion on the opposite side of the circuit board 5. The hook portion of the stop hook 37 is locked and fixed in a fixed position so as not to come off the circuit board 5.

さらに、図５と図６に示すホルダーケース２は、基板収納部２６に配置される回路基板５を樹脂モールド部４にインサート成形するために、溶融された絶縁成形樹脂を注入するための樹脂注入ガイド２９を基板配置領域２２に設けている。図５のホルダーケース２は、基板収納部２６の一方の端部（図において左側）と外部とを連通する通路を設けて樹脂注入ガイド２９としている。図５に示す樹脂注入ガイド２９は、対向する通路壁３９によって、中空室２８と区画されている。この構造のホルダーケース２は、樹脂モールド部４の成形時において、基板配置領域２２の開口部側を成形金型（図示せず）で閉塞して基板収納部２６の内部に成形室が形成される。樹脂注入ガイド２９は、周壁３０に注入孔２９ａを開口しており、樹脂注入時において、基板配置領域２２の開口部を成形金型で閉塞する状態で、この注入孔２９ａを外部に表出させるようにしている。 Further, the holder case 2 shown in FIGS. 5 and 6 is a resin injection for injecting a molten insulating molding resin in order to insert-mold the circuit board 5 arranged in the substrate storage portion 26 into the resin mold portion 4. The guide 29 is provided in the substrate arrangement area 22. The holder case 2 of FIG. 5 is provided as a resin injection guide 29 by providing a passage for communicating one end (left side in the drawing) of the substrate storage portion 26 with the outside. The resin injection guide 29 shown in FIG. 5 is partitioned from the hollow chamber 28 by an opposing passage wall 39. In the holder case 2 having this structure, when the resin mold portion 4 is molded, the opening side of the substrate arrangement region 22 is closed by a molding die (not shown) to form a molding chamber inside the substrate storage portion 26. To. The resin injection guide 29 has an injection hole 29a opened in the peripheral wall 30, and when the resin is injected, the injection hole 29a is exposed to the outside in a state where the opening of the substrate arrangement region 22 is closed by a molding die. I am trying to do it.

さらに、ホルダーケース２は、基板収納部２６の一方の端部側に設けた樹脂注入ガイド２９に加えて、基板収納部２６の反対側の端部と外部とを連通する第２の樹脂注入ガイドを設けることもできる。この構造は、樹脂モールド部の成形工程において、２箇所から絶縁成形樹脂を注入できるので、絶縁成形樹脂の注入時間を短縮しながら、成形室の隅々まで絶縁成形樹脂を充填できる特長がある。 Further, in the holder case 2, in addition to the resin injection guide 29 provided on one end side of the substrate storage portion 26, the holder case 2 has a second resin injection guide that communicates the opposite end portion of the substrate storage portion 26 with the outside. Can also be provided. Since this structure can inject the insulating molding resin from two places in the molding process of the resin molding portion, there is an advantage that the insulating molding resin can be filled in every corner of the molding chamber while shortening the injection time of the insulating molding resin.

（樹脂モールド部４）
樹脂モールド部４は、回路基板５、回路基板５に実装された電子部品、及び二次電池セル１の端子面１Ｘの一部または全体を絶縁成形樹脂に埋設して定位置に固定する。樹脂モールド部４は、回路基板５と二次電池セル１とをホルダーケース２の定位置に配置した状態で、ホルダーケース２の収納開口を成形金型（図示せず）で閉塞して成形室を形成し、この成形室に溶融された絶縁成形樹脂を注入して成形される。(Resin mold part 4)
The resin mold portion 4 embeds a part or the whole of the circuit board 5, the electronic components mounted on the circuit board 5, and the terminal surface 1X of the secondary battery cell 1 in the insulating molding resin and fixes them at a fixed position. The resin mold portion 4 has a molding chamber in which the circuit board 5 and the secondary battery cell 1 are arranged at fixed positions of the holder case 2 and the storage opening of the holder case 2 is closed with a molding die (not shown). Is formed, and the molten insulating molding resin is injected into this molding chamber to form the mold.

樹脂モールド部４は、熱可塑性樹脂を加熱し溶融状態で成形室に注入して成形される。絶縁成形樹脂の熱可塑性樹脂は、低温に加熱して、低圧で成形室に注入して成形できる樹脂、たとえば、ポリアミド樹脂やポリオレフィン系やウレタン系の熱可塑性樹脂を使用する。低温低圧で成形室に注入される樹脂は、二次電池セル１や回路基板５の実装部品に熱による悪影響を及ぼさない特徴がある。成形室に注入される溶融樹脂の温度は、ホルダーケース２の耐熱温度よりも低くすることが好ましく、例えば、７０℃以下とする。ポリオレフィン系の樹脂はポリアミド樹脂に比較して機械的強度が高いので、回路基板５や二次電池セル１をより強固に連結できる特徴がある。ポリアミド樹脂はポリオレフィン系の樹脂に比較して使用温度範囲が−４０℃〜１５０℃と広いので、二次電池セル１が使用中に高温になる場合でも強固に連結できる特徴がある。成形室に注入される溶融された絶縁成形樹脂は、回路基板５を埋設して、二次電池セル１の端子面１Ｘの一部または全体を埋設して、これらを埋設して定位置に固定する。 The resin mold portion 4 is molded by heating a thermoplastic resin and injecting it into a molding chamber in a molten state. As the thermoplastic resin of the insulating molding resin, a resin that can be molded by heating it to a low temperature and injecting it into a molding chamber at a low pressure, for example, a polyamide resin or a polyolefin-based or urethane-based thermoplastic resin is used. The resin injected into the molding chamber at low temperature and low pressure has a characteristic that it does not adversely affect the mounting components of the secondary battery cell 1 and the circuit board 5 due to heat. The temperature of the molten resin injected into the molding chamber is preferably lower than the heat-resistant temperature of the holder case 2, for example, 70 ° C. or lower. Since the polyolefin-based resin has higher mechanical strength than the polyamide resin, it has a feature that the circuit board 5 and the secondary battery cell 1 can be more firmly connected. Since the polyamide resin has a wider operating temperature range of −40 ° C. to 150 ° C. than the polyolefin-based resin, it has a feature that it can be firmly connected even when the secondary battery cell 1 becomes hot during use. In the molten insulating molding resin injected into the molding chamber, the circuit board 5 is embedded, a part or the whole of the terminal surface 1X of the secondary battery cell 1 is embedded, and these are embedded and fixed in place. To do.

回路基板５を埋設する樹脂モールド部４は、回路基板５に実装されるＦＥＴなどの半導体スイッチング素子も埋設している。この構造は、半導体スイッチング素子の発熱を樹脂モールド部４に伝導して放熱できる。したがって、樹脂モールド部４は、半導体スイッチング素子等の発熱部材の発熱を吸収して温度上昇を少なくし、さらに吸収した熱エネルギを表面から放熱して、半導体スイッチング素子の温度上昇を小さくする。また、回路基板５と二次電池セル１の端子面１Ｘを樹脂モールド部４に埋設しているので、回路基板５と二次電池セル１の端子面１Ｘとを防水構造にできる特徴もある。 The resin mold portion 4 in which the circuit board 5 is embedded also embeds a semiconductor switching element such as an FET mounted on the circuit board 5. With this structure, heat generated by the semiconductor switching element can be conducted to the resin mold portion 4 to dissipate heat. Therefore, the resin mold portion 4 absorbs heat generated by a heat generating member such as a semiconductor switching element to reduce the temperature rise, and further dissipates the absorbed heat energy from the surface to reduce the temperature rise of the semiconductor switching element. Further, since the terminal surface 1X of the circuit board 5 and the secondary battery cell 1 is embedded in the resin mold portion 4, there is also a feature that the circuit board 5 and the terminal surface 1X of the secondary battery cell 1 can have a waterproof structure.

さらに、図２に示す樹脂モールド部４は、表面に複数列の溝部４１を形成している。複数列の溝部４１は、回路基板５の長手方向に沿って設けられている。このように、樹脂モールド部４の表面に複数列の溝部４１を設ける構造は、使用する絶縁成形樹脂の量を少なくして製造コストを低減できる特徴がある。図に示すように、複数列の溝部４１は、例えば、絶縁成形樹脂で樹脂モールド部４を成形する成形室の内面であって、成形金型の表面に複数列の凸条を形成することで実現できる。ここで、図２に示す樹脂モールド部４は、回路基板５の長手方向に沿って複数列の溝部４１が形成されるようにしている。この構造は、図６の矢印Ａで示すように、樹脂注入ガイド２９から供給される溶融状態にある絶縁成形樹脂を、矢印Ｂで示すように、回路基板５の長手方向に沿ってスムーズに流入できる特徴がある。すなわち、成形室に注入される絶縁成形樹脂は、成形金型の表面に形成された複数列の凸条に沿って流動させて注入側の反対側まで充填することができる。これにより、一方向に延長された回路基板５の片側から溶融状態にある絶縁成形樹脂を注入しながら、反対側にまで流動させて成形室の隅々まで充填できる。なお、成形室の端部から溶融樹脂を注入する構造は、回路基板５に引出線６や接続リード板１６を半田付けする際に微細な半田屑が発生して回路基板５上に残存することがあっても、流動される溶融樹脂により成形室の隅部まで押し流すことができるので安全性を向上できる。さらに、表面に複数列の溝部４１を設けている樹脂モールド部４は、表面側の表面積を広くできるので、この部分からの放熱特性を向上して放熱できる特徴も実現できる。ただ、樹脂モールド部は、必ずしも表面に溝部を設ける必要はなく、表面を平面状に成形することもできる。 Further, the resin mold portion 4 shown in FIG. 2 has a plurality of rows of groove portions 41 formed on the surface thereof. The plurality of rows of grooves 41 are provided along the longitudinal direction of the circuit board 5. As described above, the structure in which the groove portions 41 in a plurality of rows are provided on the surface of the resin mold portion 4 is characterized in that the amount of the insulating molding resin used can be reduced to reduce the manufacturing cost. As shown in the figure, the plurality of rows of grooves 41 are, for example, the inner surface of a molding chamber for molding the resin mold portion 4 with an insulating molding resin, and by forming a plurality of rows of ridges on the surface of the molding die. realizable. Here, in the resin mold portion 4 shown in FIG. 2, a plurality of rows of groove portions 41 are formed along the longitudinal direction of the circuit board 5. In this structure, as shown by the arrow A in FIG. 6, the insulated molding resin in the molten state supplied from the resin injection guide 29 flows smoothly along the longitudinal direction of the circuit board 5 as shown by the arrow B. There are features that can be done. That is, the insulating molding resin injected into the molding chamber can be flowed along a plurality of rows of ridges formed on the surface of the molding die and filled up to the opposite side of the injection side. As a result, while the insulating molding resin in the molten state is injected from one side of the circuit board 5 extended in one direction, it can be flowed to the other side to fill every corner of the molding chamber. In the structure in which the molten resin is injected from the end of the molding chamber, fine solder debris is generated when the leader wire 6 and the connecting lead plate 16 are soldered to the circuit board 5, and remains on the circuit board 5. Even if there is, the molten resin that flows can be flushed to the corners of the molding chamber, so that safety can be improved. Further, since the resin mold portion 4 provided with the plurality of rows of groove portions 41 on the surface can have a large surface area on the surface side, it is possible to realize a feature that heat dissipation characteristics from this portion can be improved and heat can be dissipated. However, the resin molded portion does not necessarily have to be provided with a groove portion on the surface, and the surface can be molded into a flat surface.

（保護素子７）
保護素子７は、二次電池セル１の温度を検出して、検出温度が設定温度よりも高くなると電流を遮断し、あるいは、回路に流れる過電流を検出して電流を遮断する素子であって、ブレーカ７１やヒューズ７２、ＰＴＣ等が使用できる。すなわち、本明細書において、保護素子７とは、二次電池セル１の温度上昇や回路に流れる過電流を検出して電流を遮断するブレーカ７１やヒューズ７２、ＰＴＣ等の電流遮断素子を含む広い意味で使用する。図に示す回路基板５は、長手方向における両端部であって、二次電池セル１の端子面１Ｘと対向する位置にブレーカ７１を配置すると共に、回路基板５の中央部の片側にヒューズ７２を配置している。(Protective element 7)
The protection element 7 is an element that detects the temperature of the secondary battery cell 1 and cuts off the current when the detected temperature becomes higher than the set temperature, or detects an overcurrent flowing in the circuit and cuts off the current. , Breaker 71, fuse 72, PTC, etc. can be used. That is, in the present specification, the protective element 7 includes a wide range of current blocking elements such as a breaker 71, a fuse 72, and a PTC that detect a temperature rise of the secondary battery cell 1 and an overcurrent flowing in the circuit to cut off the current. Used in the sense. The circuit board 5 shown in the figure is both ends in the longitudinal direction, and the breaker 71 is arranged at a position facing the terminal surface 1X of the secondary battery cell 1, and a fuse 72 is provided on one side of the central portion of the circuit board 5. It is arranged.

（ブレーカ７１）
保護素子７であるブレーカ７１は、電池パック１００に内蔵される各二次電池セル１に対して配置されている。図に示す電池パック１００は２個の二次電池セル１を備えているので、２個のブレーカ７１を各々の二次電池セル１に接続している。各ブレーカ７１は、回路基板５の端縁部に実装されており、図５に示すように、二次電池セル１を回路基板５に接続する接続リード板１６を介して、対向する二次電池セル１に直列に接続されている。(Circuit breaker 71)
The breaker 71, which is the protective element 7, is arranged for each secondary battery cell 1 built in the battery pack 100. Since the battery pack 100 shown in the figure includes two secondary battery cells 1, two breakers 71 are connected to each secondary battery cell 1. Each breaker 71 is mounted on the edge portion of the circuit board 5, and as shown in FIG. 5, the secondary batteries facing each other via the connection lead plate 16 that connects the secondary battery cell 1 to the circuit board 5. It is connected in series to cell 1.

ブレーカ７１は、図９と図１０に示すように、外形を角型とする本体部７１Ｘと、この本体部の両端から突出する一対のリード板７１Ａ、７１Ｂとを備えている。図のブレーカ７１は、回路基板５の端縁部に形成された切欠部５１に全体を収納する状態で配置されている。図の回路基板５は、端子面１Ｘと対向する端縁部をコ字状に切り欠いて、ブレーカ７１を回路基板５の両面に表出させる状態で収納する切欠部５１を設けている。このブレーカ７１は、切欠部５１に配置される状態で、本体部７１Ａの表面を、回路基板５の表面と略同一平面に配置している。さらに、切欠部５１に配置されるブレーカ７１は、回路基板５の第１面である裏側面に電気接続されている。このブレーカ７１は、図１０に示すように、回路基板５の第１面において、切欠部５１の両側部から内側に突出して固定された一対の接続プレート５３を介して回路基板５に接続されている。具体的には、ブレーカ７１の一方のリード板７１Ａを第１接続プレート５３Ａに接続すると共に、他方のリード板７１Ｂを第２接続プレート５３Ｂに接続して回路基板５に接続している。接続プレート５３には、例えばニッケル板等の金属板が使用できる。 As shown in FIGS. 9 and 10, the breaker 71 includes a main body portion 71X having a square outer shape, and a pair of lead plates 71A and 71B protruding from both ends of the main body portion. The breaker 71 in the figure is arranged in a state of being entirely housed in a notch 51 formed at an edge portion of the circuit board 5. The circuit board 5 in the figure is provided with a notch 51 in which an edge portion facing the terminal surface 1X is cut out in a U shape and the breaker 71 is housed in a state of being exposed on both sides of the circuit board 5. The breaker 71 is arranged in the notch 51, and the surface of the main body 71A is arranged on substantially the same plane as the surface of the circuit board 5. Further, the breaker 71 arranged in the notch 51 is electrically connected to the back surface which is the first surface of the circuit board 5. As shown in FIG. 10, the breaker 71 is connected to the circuit board 5 on the first surface of the circuit board 5 via a pair of connection plates 53 protruding inward from both sides of the notch 51 and fixed. There is. Specifically, one lead plate 71A of the breaker 71 is connected to the first connection plate 53A, and the other lead plate 71B is connected to the second connection plate 53B to be connected to the circuit board 5. For the connection plate 53, for example, a metal plate such as a nickel plate can be used.

さらに、回路基板５の裏側面に固定された第１接続プレート５３Ａは、回路基板５の内部に配線された金属パターンである接続ライン５４を介して、回路基板５の第２面である表側面に形成された第１接続ランド５２Ａに電気接続されている。図９に示す回路基板５は、二次電池セル１から引き出された一対の接続リード板１６を接続するために、第２面の端部に一対の接続ランド５２を形成している。二次電池セル１は、第１接続リード板１６Ａが第１接続ランド５２Ａに接続されると共に、第２接続リード板１６Ｂが第２接続ランド５２Ｂに接続されて回路基板５の第２面に電気接続される。この二次電池セル１は、第２の電極１０Ｂ側では、平面電極１４→第２接続リード板１６Ｂ→第２接続ランド５２Ｂの順に通電して、回路基板５のプラス側出力ライン（図示せず）に出力する。また、二次電池セル１は、第１の電極１０Ａ側では、回路基板５のマイナス側出力ライン（図示せず）から供給される電力が、第２接続プレート５３Ｂ→リード板７１Ｂ→ブレーカ７１の本体部７１Ｘ→リード板７１Ａ→第１接続プレート５３Ａ→接続ライン５４→第１接続ランド５２Ａ→第１接続リード板１６Ａ→凸部電極１３の順に通電されて二次電池セル１に入力される。このように、二次電池セル１の負極側である第１の電極１０Ａをブレーカ７１を接続する構造は、保護素子７をグランド側に接続できるので、安全性を確保できる。ただ、ブレーカは二次電池セルの正極側である第２の電極に接続することもできる。 Further, the first connection plate 53A fixed to the back side surface of the circuit board 5 is the front side surface which is the second surface of the circuit board 5 via the connection line 54 which is a metal pattern wired inside the circuit board 5. It is electrically connected to the first connection land 52A formed in. The circuit board 5 shown in FIG. 9 forms a pair of connection lands 52 at the ends of the second surface in order to connect the pair of connection lead plates 16 drawn out from the secondary battery cell 1. In the secondary battery cell 1, the first connection lead plate 16A is connected to the first connection land 52A, and the second connection lead plate 16B is connected to the second connection land 52B to supply electricity to the second surface of the circuit board 5. Be connected. On the second electrode 10B side, the secondary battery cell 1 is energized in the order of the flat electrode 14 → the second connection lead plate 16B → the second connection land 52B, and the positive side output line of the circuit board 5 (not shown). ). Further, in the secondary battery cell 1, on the first electrode 10A side, the electric power supplied from the negative side output line (not shown) of the circuit board 5 is the second connection plate 53B → lead plate 71B → breaker 71. The main body 71X → lead plate 71A → first connection plate 53A → connection line 54 → first connection land 52A → first connection lead plate 16A → convex electrode 13 is energized in this order and input to the secondary battery cell 1. As described above, in the structure in which the breaker 71 is connected to the first electrode 10A on the negative electrode side of the secondary battery cell 1, the protection element 7 can be connected to the ground side, so that safety can be ensured. However, the breaker can also be connected to the second electrode on the positive electrode side of the secondary battery cell.

以上の構造は、回路基板５の第１面である裏側面においてブレーカ７１のリード板７１Ａ、７１Ｂを回路基板５に接続し、回路基板５の第２面である表側面において二次電池セル１から引き出された接続リード板１６を回路基板５に接続するので、ブレーカ７１と接続リード板１６とを接近させて配線する状態においても、接続リード板１６とリード板７１Ａ、７１Ｂとが接触してショートするのを確実に阻止できる特長がある。ただ、ブレーカは、必ずしも回路基板に設けた切欠部に配置する必要はなく、回路基板の表面に実装することもできる。このように配置されるブレーカは、例えば、リフロー半田等の方法で簡単に回路基板に実装することができる。 In the above structure, the lead plates 71A and 71B of the breaker 71 are connected to the circuit board 5 on the back side surface which is the first surface of the circuit board 5, and the secondary battery cell 1 is connected to the front side surface which is the second surface of the circuit board 5. Since the connection lead plate 16 drawn from the circuit board 5 is connected to the circuit board 5, the connection lead plate 16 and the lead plates 71A and 71B are in contact with each other even when the breaker 71 and the connection lead plate 16 are brought close to each other for wiring. It has the feature of being able to reliably prevent short circuits. However, the breaker does not necessarily have to be arranged in the notch provided in the circuit board, and can be mounted on the surface of the circuit board. The breaker arranged in this way can be easily mounted on the circuit board by a method such as reflow soldering.

さらに、電池パック１００は、二次電池セル１の発熱を、保護素子７であるブレーカ７１で確実に検出するために、ブレーカ７１の本体部７１Ｘの表面に接続リード板１６を熱結合状態で積層している。図９と図１０に示す構造では、第１の電極１０Ａである凸部電極１３に接続された第１接続リード板１６Ａを、ブレーカ７１の本体部７１Ｘの表面に積層する状態で配置して、ブレーカ７１の本体部７１Ｘと第１接続リード板１６Ａとを熱結合させている。これにより、二次電池セル１の発熱を効果的にブレーカ７１に熱伝導させて、二次電池セル１の温度が設定温度まで上昇すると、この発熱をブレーカ７１で確実に検出して電流を遮断できようにしている。 Further, in the battery pack 100, the connection lead plate 16 is laminated in a heat-bonded state on the surface of the main body 71X of the breaker 71 in order to reliably detect the heat generated by the secondary battery cell 1 by the breaker 71 which is the protective element 7. doing. In the structures shown in FIGS. 9 and 10, the first connection lead plate 16A connected to the convex electrode 13 which is the first electrode 10A is arranged in a state of being laminated on the surface of the main body portion 71X of the breaker 71. The main body 71X of the breaker 71 and the first connection lead plate 16A are thermally coupled. As a result, the heat generated by the secondary battery cell 1 is effectively conducted to the breaker 71, and when the temperature of the secondary battery cell 1 rises to the set temperature, the heat generated by the breaker 71 is reliably detected by the breaker 71 to cut off the current. I am trying to do it.

図に示す第１接続リード板１６Ａは、ブレーカ７１の本体部７１Ｘに対して交差する姿勢で配置されており、第１接続リード板１６Ａの先端部を第１接続ランド５２Ａに接続する状態で、第１接続リード板１６Ａの中間部を、本体部７１Ｘの表面に確実に接触させるようにしている。とくに、図に示すブレーカ７１は、回路基板５に設けた切欠部５１に配置することで、本体部７１Ｘの表面を回路基板５の表側面と略同一平面としている。このため、二次電池セル１の電極１０から引き出された接続リード板１６を回路基板５の表側面に設けた接続ランド５２に接続する状態で、接続リード板１６を理想的にブレーカ７１の本体部７１Ｘの表面に積層させて接触させることができる。 The first connection lead plate 16A shown in the figure is arranged so as to intersect the main body 71X of the breaker 71, and the tip of the first connection lead plate 16A is connected to the first connection land 52A. The intermediate portion of the first connection lead plate 16A is ensured to be in contact with the surface of the main body portion 71X. In particular, the breaker 71 shown in the figure is arranged in the notch 51 provided in the circuit board 5, so that the surface of the main body 71X is substantially flush with the front side surface of the circuit board 5. Therefore, the connection lead plate 16 is ideally connected to the main body of the breaker 71 in a state where the connection lead plate 16 drawn from the electrode 10 of the secondary battery cell 1 is connected to the connection land 52 provided on the front side surface of the circuit board 5. It can be laminated and brought into contact with the surface of the portion 71X.

以上の電池パック１００は、二次電池セル１の凸部電極１３に接続された接続リード板１６をブレーカ７１に積層している。このように、二次電池セル１の凸部電極１３に接続された接続リード板１６をブレーカ７１に熱結合させる構造は、二次電池セル内部の発熱を凸部電極１３からブレーカ７１に効果的に熱伝導させてブレーカ７１を確実に動作させることができる。ただ、電池パックは、図示しないが、二次電池セルの封口板に接続された接続リード板をブレーカに積層させて、二次電池セルの発熱を検出することもできる。 In the above battery pack 100, the connection lead plate 16 connected to the convex electrode 13 of the secondary battery cell 1 is laminated on the breaker 71. In this way, the structure in which the connection lead plate 16 connected to the convex electrode 13 of the secondary battery cell 1 is thermally coupled to the breaker 71 is effective in transmitting heat generated inside the secondary battery cell from the convex electrode 13 to the breaker 71. The breaker 71 can be reliably operated by conducting heat conduction to the battery. However, although not shown, the battery pack can also detect heat generation in the secondary battery cell by stacking a connection lead plate connected to the sealing plate of the secondary battery cell on the breaker.

（ヒューズ７２）
保護素子７であるヒューズ７２は、直列に接続される二次電池セル１の間に接続されて、過電流が流れる状態で溶断されて電流を遮断する。図６に示すヒューズ７２は、回路基板５の中央部の片側の領域であって、溶融された絶縁成形樹脂が注入される樹脂注入ガイド２９から離れた領域に配置されている。この構造は、図６の矢印Ａ及びＢで示すように、樹脂注入ガイド２９から供給される溶融樹脂の流動距離を長くできるので、溶融樹脂の熱でヒューズ７２が誤って溶断されるのを有効に防止できる。(Fuse 72)
The fuse 72, which is the protection element 7, is connected between the secondary battery cells 1 connected in series, and is blown in a state where an overcurrent flows to cut off the current. The fuse 72 shown in FIG. 6 is arranged in a region on one side of the central portion of the circuit board 5 and in a region away from the resin injection guide 29 into which the molten insulating molding resin is injected. As shown by arrows A and B in FIG. 6, this structure can increase the flow distance of the molten resin supplied from the resin injection guide 29, so that it is effective that the fuse 72 is erroneously blown by the heat of the molten resin. Can be prevented.

さらに、図２と図３に示す樹脂モールド部４は、樹脂注入ガイド２９から注入される溶融樹脂が直接にヒューズ７２に当接するのを防止するために、遮蔽溝４２を設けている。この遮蔽溝４２は、溶融樹脂を成形室に注入する状態で、成形金型の内面に突出して設けた遮蔽リブ９９（図６において鎖線で表示）により形成される。図６に示す遮蔽リブ９９は、平面視をコ字状としており、溶融された絶縁成形樹脂の流入側を閉塞して反対側に開口部を配置する姿勢で設けられている。この遮蔽リブ９９により、成形室に供給される絶縁成形樹脂は、直接にヒューズ７２に当接することなく遮蔽リブ９９を迂回する状態でヒューズ７２の周囲まで充填される。このため、溶融状態にある高温の絶縁成形樹脂が直接にヒューズ７２に接触することなく、ある程度、温度が低下した状態でヒューズ７２に接触することでヒューズの誤作動が防止される。ただ、樹脂注入ガイド２９とヒューズ７２の間隔を広くして溶融樹脂の流動距離を長くできる場合には、必ずしも樹脂モールド部に遮蔽溝を設ける必要はない。 Further, the resin mold portion 4 shown in FIGS. 2 and 3 is provided with a shielding groove 42 in order to prevent the molten resin injected from the resin injection guide 29 from directly contacting the fuse 72. The shielding groove 42 is formed by a shielding rib 99 (indicated by a chain line in FIG. 6) provided so as to project from the inner surface of the molding die while the molten resin is injected into the molding chamber. The shielding rib 99 shown in FIG. 6 has a U-shape in a plan view, and is provided in a posture of closing the inflow side of the molten insulating molding resin and arranging an opening on the opposite side. The insulating molding resin supplied to the molding chamber by the shielding rib 99 is filled up to the periphery of the fuse 72 in a state of bypassing the shielding rib 99 without directly contacting the fuse 72. Therefore, the high-temperature insulating molding resin in the molten state does not come into direct contact with the fuse 72, but comes into contact with the fuse 72 in a state where the temperature has dropped to some extent, thereby preventing the fuse from malfunctioning. However, when the distance between the resin injection guide 29 and the fuse 72 can be widened to increase the flow distance of the molten resin, it is not always necessary to provide a shielding groove in the resin mold portion.

（引出線６）
さらに、図１〜図６に示す電池パック１００は、複数の引出線６を回路基板５に接続して、これを樹脂モールド部４から外部に引き出している。引出線６は、正負の電力ラインと信号ラインからなり、電池パック１００をセットする機器のコネクタに直接に接続される。複数の引出線６は、一端を回路基板５に連結すると共に、他端にはコネクタ６９を接続している。引出線６は、一端が回路基板５に接続された状態で、絶縁成形樹脂に埋設されて固定され、回路基板５がインサート成形された樹脂モールド部４から外部に引き出される。複数の引出線６は、図１１に示すように、回路基板５に接続される端部を、位置決め機構６０を介して定位置に配置している。(Leader line 6)
Further, in the battery pack 100 shown in FIGS. 1 to 6, a plurality of leader wires 6 are connected to the circuit board 5 and pulled out from the resin mold portion 4 to the outside. The leader line 6 is composed of positive and negative power lines and signal lines, and is directly connected to the connector of the device in which the battery pack 100 is set. One end of the plurality of leader wires 6 is connected to the circuit board 5, and the other end is connected to the connector 69. The leader wire 6 is embedded and fixed in an insulating molding resin with one end connected to the circuit board 5, and the circuit board 5 is pulled out from the insert-molded resin mold portion 4. As shown in FIG. 11, the plurality of leader lines 6 have their ends connected to the circuit board 5 arranged at fixed positions via the positioning mechanism 60.

図１１〜図１３に示す位置決め機構６０は、ホルダーケース２に一体成形して設けている。図に示すホルダーケース２は、基板収納部２６に配置された回路基板５の定位置に複数の引出線６を配置するために、基板収納部２６の外周面であって区画壁３３の一部に位置決め機構６０を設けている。図１１〜図１３に示す位置決め機構６０は、複数の引出線６を平行な姿勢で所定の間隔で配置できるように、互いに平行な姿勢で形成された複数列の櫛状リブ６１を備えており、隣接する櫛状リブ６１の間に引出線６を挿入して定位置に配置する複数列のガイド溝６２を設けている。複数列のガイド溝６２は、各々の引出線６を別々に独立して挿入でき、かつ挿入された引出線６を櫛状リブ６１に沿って移動できるようにしている。 The positioning mechanism 60 shown in FIGS. 11 to 13 is integrally molded with the holder case 2. The holder case 2 shown in the figure is an outer peripheral surface of the board storage unit 26 and is a part of the partition wall 33 in order to arrange a plurality of leader lines 6 at fixed positions of the circuit board 5 arranged in the board storage unit 26. Is provided with a positioning mechanism 60. The positioning mechanism 60 shown in FIGS. 11 to 13 includes a plurality of rows of comb-shaped ribs 61 formed in parallel postures so that the plurality of leader lines 6 can be arranged in parallel postures at predetermined intervals. , A plurality of rows of guide grooves 62 are provided between the adjacent comb-shaped ribs 61 by inserting the leader line 6 and arranging them at a fixed position. The plurality of rows of guide grooves 62 allow each leader line 6 to be inserted separately and independently, and allow the inserted leader line 6 to move along the comb-shaped rib 61.

図１３に示す位置決め機構６０は、複数列の櫛状リブ６１を等間隔に並設して複数列のガイド溝６２を等間隔に設けている。この位置決め機構６０は、各々のガイド溝６２に引出線６を挿入して、各引出線６を一定の間隔に配置する。ガイド溝６２の間隔は、先端のコネクタ６９に連結している引出線６の間隔とほぼ等しくすることができる。この位置決め機構６０は、コネクタ６９に連結している各引出線６を、コネクタ６９の近傍で速やかにガイド溝６２に案内できる。それは、コネクタ６９を介して複数の引出線６をガイド溝６２の間隔に配置できるので、複数の引出線６をガイド溝６２に押し込んで、全ての引出線６を簡単にガイド溝６２に挿入できるからである。 In the positioning mechanism 60 shown in FIG. 13, a plurality of rows of comb-shaped ribs 61 are arranged side by side at equal intervals, and a plurality of rows of guide grooves 62 are provided at equal intervals. The positioning mechanism 60 inserts leader lines 6 into each guide groove 62 and arranges the leader lines 6 at regular intervals. The distance between the guide grooves 62 can be substantially equal to the distance between the leader wires 6 connected to the connector 69 at the tip. The positioning mechanism 60 can quickly guide each leader wire 6 connected to the connector 69 to the guide groove 62 in the vicinity of the connector 69. Since a plurality of leader wires 6 can be arranged at intervals of the guide grooves 62 via the connector 69, the plurality of leader wires 6 can be pushed into the guide grooves 62 and all the leader wires 6 can be easily inserted into the guide grooves 62. Because.

ガイド溝６２は、引出線６を挿入できる深さと幅を有すると共に、上端開口６３を引出線６の太さよりもやや狭くして、ここに挿入される引出線６が外部に抜けるのを防止している。図１２と図１３に示すガイド溝６２は、櫛状リブ６１の上端部を内側に突出する形状に形成して上端開口６３を狭くしている。このガイド溝６２は、上端開口６２の開口幅を引出線６の外形よりも小さく、かつ、引出線６の芯線６ａの太さよりも大きくしている。このガイド溝６２は、上端開口６３から引出線６を押し込むことで、引出線６を簡単に挿入できると共に、ガイド溝６２に挿入した状態では、引出線６をガイド溝６２に沿って摺動させることができる。 The guide groove 62 has a depth and width into which the leader line 6 can be inserted, and the upper end opening 63 is made slightly narrower than the thickness of the leader line 6 to prevent the leader line 6 inserted therein from coming out. ing. The guide groove 62 shown in FIGS. 12 and 13 is formed so that the upper end portion of the comb-shaped rib 61 protrudes inward to narrow the upper end opening 63. The guide groove 62 has an opening width of the upper end opening 62 smaller than the outer shape of the leader wire 6 and larger than the thickness of the core wire 6a of the leader wire 6. The leader wire 6 can be easily inserted into the guide groove 62 by pushing the leader wire 6 through the upper end opening 63, and when the leader wire 6 is inserted into the guide groove 62, the leader wire 6 is slid along the guide groove 62. be able to.

さらに、図１２と図１３に示す位置決め機構６０は、ガイド溝６２の回路基板５側であって、基板収納部２６との境界である区画壁３３に、引出線６の外周面に沿う円形溝６４を設けている。このように、回路基板側の端面に形成される円形溝６４は、ここに挿通される引出線６との隙間を狭くできるので、樹脂モールド部４の成形時に成形室となる基板収納部２６に充填される溶融樹脂がガイド溝６２から外部に漏れるのを有効に防止できる。さらに、図に示すホルダーケース２は、引出線６が引き出される側の周壁３０と位置決め機構６０との間に引出線６を通過させる引き出し凹部６６を設けている。 Further, the positioning mechanism 60 shown in FIGS. 12 and 13 is a circular groove along the outer peripheral surface of the leader line 6 on the partition wall 33, which is on the circuit board 5 side of the guide groove 62 and is a boundary with the board storage portion 26. 64 is provided. In this way, the circular groove 64 formed on the end surface on the circuit board side can narrow the gap between the circular groove 64 and the leader wire 6 inserted therein. It is possible to effectively prevent the molten resin to be filled from leaking to the outside from the guide groove 62. Further, the holder case 2 shown in the figure is provided with a drawer recess 66 for passing the leader line 6 between the peripheral wall 30 on the side where the leader line 6 is drawn out and the positioning mechanism 60.

以上の位置決め機構６０は、上端開口６３からそれぞれのガイド溝６２に引出線６を挿入する状態で、引出線６を軸方向に摺動できるようにしている。この位置決め機構６０は、コネクタ６９の近傍で引出線６をガイド溝６２に挿入した後、コネクタ６９をガイド溝６２から遠ざける方向に移動させて、ホルダーケース２から引き出される引出線６の長さが所定の長さとなるように調整する。複数の引出線６は、ホルダーケース２から所定の長さが引き出された状態で、先端部が回路基板５に半田付けして接続される。さらに、位置決め機構６０は、回路基板４にハンダ付けされる引出線６の先端部を回路基板５との接続部分まで移動させた状態で、複数の引出線６を一定の間隔に配置する。回路基板４には、図１１に示すように、位置決め機構６０で一定の間隔に保持される引出線６の先端部をハンダ付けできる位置に、複数の接続部５５を設けている。複数の接続部５５の間隔は、位置決め機構６０が引出線６を配置する間隔に等しいので、各引出線６の先端をハンダ付けする接続部５５に配置して、各引出線６を能率よくハンダ付けできる。位置決め機構６０を介して回路基板５の定位置に接続された複数の引出線６は、回路基板５が絶縁成形樹脂に埋設される状態で固定されて、樹脂モールド部４から外部に引き出される。 The positioning mechanism 60 described above allows the leader wire 6 to slide in the axial direction while the leader wire 6 is inserted into each of the guide grooves 62 from the upper end opening 63. In this positioning mechanism 60, after inserting the leader wire 6 into the guide groove 62 in the vicinity of the connector 69, the connector 69 is moved in a direction away from the guide groove 62, and the length of the leader wire 6 drawn out from the holder case 2 is reduced. Adjust to the specified length. The plurality of leader wires 6 are connected by soldering their tip portions to the circuit board 5 in a state where a predetermined length is pulled out from the holder case 2. Further, the positioning mechanism 60 arranges a plurality of leader wires 6 at regular intervals in a state where the tip portion of the leader wire 6 soldered to the circuit board 4 is moved to the connection portion with the circuit board 5. As shown in FIG. 11, the circuit board 4 is provided with a plurality of connecting portions 55 at positions where the tip portions of the leader wires 6 held at regular intervals by the positioning mechanism 60 can be soldered. Since the spacing between the plurality of connecting portions 55 is equal to the spacing at which the positioning mechanism 60 arranges the leader wires 6, the tips of the leader wires 6 are arranged at the connecting portions 55 to be soldered, and the leader wires 6 are efficiently soldered. Can be attached. The plurality of leader wires 6 connected to the fixed positions of the circuit board 5 via the positioning mechanism 60 are fixed in a state where the circuit board 5 is embedded in the insulating molding resin, and are drawn out from the resin mold portion 4.

以上の位置決め機構６０は、ホルダーケース２に一体成形して設けている。ただ、位置決め機構６０は、ホルダーケース２と別部材の位置決めホルダとして、ホルダーケースに連結して固定することもできる。この位置決めホルダは、前述の位置決め機構と同様の形状とすることができ、ホルダーケースには、位置決めホルダを定位置に配置する連結部を設けることができる。この位置決めホルダは、例えば、回路基板の定位置に固定した状態で、引出線を接続し、その後、ホルダーケースの基板収納部に回路基板を配置してホルダーケースの定位置に配置することができる。 The above positioning mechanism 60 is integrally molded with the holder case 2. However, the positioning mechanism 60 can be connected to and fixed to the holder case as a positioning holder that is a separate member from the holder case 2. The positioning holder can have the same shape as the positioning mechanism described above, and the holder case can be provided with a connecting portion for arranging the positioning holder at a fixed position. For example, this positioning holder can be fixed at a fixed position on the circuit board, a leader wire can be connected, and then the circuit board can be placed in the board storage portion of the holder case to be placed at the fixed position on the holder case. ..

（外装シート８）
さらに、電池パック１００は、二次電池セル１の周囲を外装シート８で被覆している。図１の電池パック１００は、ホルダーケース２のフレーム部２７に収納された二次電池セル１とフレーム部２７とを外装シート８で被覆して固定している。この外装シート８は絶縁シートで、二次電池セル１の外周を絶縁しながら、フレーム部２７と二次電池セル１とを強固に連結している。(Exterior sheet 8)
Further, in the battery pack 100, the periphery of the secondary battery cell 1 is covered with the exterior sheet 8. In the battery pack 100 of FIG. 1, the secondary battery cell 1 and the frame portion 27 housed in the frame portion 27 of the holder case 2 are covered with the exterior sheet 8 and fixed. The exterior sheet 8 is an insulating sheet that firmly connects the frame portion 27 and the secondary battery cell 1 while insulating the outer periphery of the secondary battery cell 1.

以上の電池パック１００は、以下のようにして製造される。
（１）回路基板５に保護素子７であるブレーカ７１を接続する。回路基板５は、図５に示すように、長手方向の両端部であって、二次電池セル１の端子面１Ｘと対向する部分にブレーカ７１が固定される。ブレーカ７１は、図９と図１０に示すように、回路基板５の端部に設けた切欠部５１に配置されると共に、本体部７１Ｘの両端から突出するリード板７１Ａ、７１Ｂが回路基板５に設けた接続プレート５３に接続される。The above battery pack 100 is manufactured as follows.
(1) The breaker 71, which is a protective element 7, is connected to the circuit board 5. As shown in FIG. 5, the circuit board 5 has breakers 71 fixed to both ends in the longitudinal direction and facing the terminal surface 1X of the secondary battery cell 1. As shown in FIGS. 9 and 10, the breaker 71 is arranged in the notch 51 provided at the end of the circuit board 5, and the lead plates 71A and 71B protruding from both ends of the main body 71X are formed on the circuit board 5. It is connected to the provided connection plate 53.

（２）回路基板５をホルダーケース２に配置する。回路基板５は、ホルダーケース２の基板収納部２６に案内されて、図８に示すように、連結機構１９を介して係止構造で定位置にセットされる。 (2) The circuit board 5 is arranged in the holder case 2. The circuit board 5 is guided by the board storage portion 26 of the holder case 2 and is set at a fixed position in a locking structure via a connecting mechanism 19 as shown in FIG.

（３）ホルダーケース２にセットされた回路基板５に引出線６を接続する。図４と図６に示す引出線６は、他端にコネクタ６９を備えており、コネクタ側の中間部を位置決め機構６０のガイド溝６２に挿入した後、コネクタ６９をガイド溝６２から遠ざける方向に移動させて引出線６の長さを調整する。この状態で、複数の引出線６の先端部が回路基板５に半田付けして接続される。 (3) The leader wire 6 is connected to the circuit board 5 set in the holder case 2. The leader wire 6 shown in FIGS. 4 and 6 has a connector 69 at the other end, and after inserting the intermediate portion on the connector side into the guide groove 62 of the positioning mechanism 60, the connector 69 is moved away from the guide groove 62. Move it to adjust the length of the leader line 6. In this state, the tips of the plurality of leader wires 6 are soldered and connected to the circuit board 5.

（４）ホルダーケース２の電池収納部２５に二次電池セル１を配置する。図５に示すホルダーケース２は、両端部にフレーム部２７を備えており、このフレーム部２７の内側に二次電池セル１をセットして定位置に配置する。２個の二次電池セル１は、端子面１Ｘが互いに対向する姿勢で配置される。 (4) The secondary battery cell 1 is arranged in the battery storage portion 25 of the holder case 2. The holder case 2 shown in FIG. 5 is provided with frame portions 27 at both ends, and the secondary battery cell 1 is set inside the frame portions 27 and arranged at a fixed position. The two secondary battery cells 1 are arranged so that the terminal surfaces 1X face each other.

（５）二次電池セル１の端子面１Ｘに接続された一対の接続リード板１６を回路基板５に接続する。二次電池セル１は、図９に示すように、第１の電極１０Ａに接続された第１接続リード板１６Ａが、ブレーカ７１の表面に積層する状態で配置されて、回路基板５の第１接続ランド５２Ｂに接続され、第２の電極１０Ｂに接続された第２接続リード板１６Ｂが、回路基板５の第２接続ランド５２Ｂに接続される。 (5) A pair of connection lead plates 16 connected to the terminal surface 1X of the secondary battery cell 1 are connected to the circuit board 5. In the secondary battery cell 1, as shown in FIG. 9, the first connection lead plate 16A connected to the first electrode 10A is arranged in a state of being laminated on the surface of the breaker 71, and the first circuit board 5 is arranged. The second connection lead plate 16B connected to the connection land 52B and connected to the second electrode 10B is connected to the second connection land 52B of the circuit board 5.

（６）ホルダーケース２の基板配置領域２２の開口部側を成形金型（図示せず）で閉塞して基板収納部２６の内部に成形室を成形する。この状態で、溶融された絶縁成形樹脂を樹脂注入ガイド２９の注入孔２９ａから注入して樹脂モールド部４を成形する。 (6) The opening side of the substrate arrangement area 22 of the holder case 2 is closed with a molding die (not shown) to form a molding chamber inside the substrate storage portion 26. In this state, the molten insulation molding resin is injected through the injection hole 29a of the resin injection guide 29 to mold the resin mold portion 4.

（７）絶縁成形樹脂が硬化して、成形金型を脱型した後、ホルダーケース２のフレーム部２と二次電池セル１とを外装シート８で被覆する。 (7) After the insulating molding resin is cured and the molding die is removed, the frame portion 2 of the holder case 2 and the secondary battery cell 1 are covered with the exterior sheet 8.

以上の電池パック１００は、対向する二次電池セル１を両端部に配置して、これ等の間に回路基板５を配置する構造としているが、電池パックは、複数の二次電池セルを端子面が同一平面に位置するように横に並べて配置し、複数の端子面と対向する位置に回路基板を配置することもできる。 The above battery pack 100 has a structure in which opposing secondary battery cells 1 are arranged at both ends and a circuit board 5 is arranged between them. However, the battery pack has a plurality of secondary battery cells as terminals. It is also possible to arrange the circuit boards side by side so that the surfaces are located on the same plane, and arrange the circuit boards at positions facing a plurality of terminal surfaces.

さらに、以上の実施形態の電池パック１００は、２個の二次電池セル１をホルダーケース２の両端部に配置して、対向する二次電池セル１の間に回路基板５を配置する構造としたが、本発明の電池パックは、１個の二次電池セルを備えることも、３個以上の二次電池セルを備えることもできる。以下、本発明の他の実施形態に係る電池パックとして、１個の二次電池セル１を備える電池パック２００の一例を図１４に、また、４個の二次電池セル１を備える電池パック３００の一例を図１５にそれぞれ示している。ここで、図１４と図１５に示す電池パック２００、３００は、樹脂モールド部と外装シートを除いた状態を示している。また、これ等の図に示す実施形態において、前述の実施形態と同じ構成要素については、同符号を付してその詳細な説明は省略している。 Further, the battery pack 100 of the above embodiment has a structure in which two secondary battery cells 1 are arranged at both ends of the holder case 2 and a circuit board 5 is arranged between the opposing secondary battery cells 1. However, the battery pack of the present invention may include one secondary battery cell or may include three or more secondary battery cells. Hereinafter, as a battery pack according to another embodiment of the present invention, an example of a battery pack 200 including one secondary battery cell 1 is shown in FIG. 14, and a battery pack 300 including four secondary battery cells 1 is shown in FIG. An example is shown in FIG. 15, respectively. Here, the battery packs 200 and 300 shown in FIGS. 14 and 15 show a state in which the resin mold portion and the exterior sheet are removed. Further, in the embodiments shown in these figures, the same components as those in the above-described embodiment are designated by the same reference numerals, and detailed description thereof is omitted.

図１４に示す電池パック２００は、ホルダーケース２Ｂが、１個の二次電池セル１が配置されるフレーム部２７Ｂで構成される電池配置領域２１Ｂと、この二次電池セル１の端子面１Ｘに沿って回路基板５Ｂが配置される基板配置領域２２Ｂとを備えている。図に示す基板配置領域２２Ｂは、中空部を設けることなく、樹脂成形領域２３Ｂのみを設けており、この樹脂成形領域２３Ｂを基板収納部２６Ｂとして回路基板５Ｂを配置している。ただ、ホルダーケースは、図の鎖線で示すように、基板収納部の設計変更等により領域を広くする場合に中空部を設けることもできる。図の回路基板５Ｂは、ホルダーケース２Ｂの短手方向に延在された形状としており、二次電池セル１の端子面１Ｘと対向する側縁部に保護素子７であるブレーカ７１を実装している。また、この電池パック２００は、ホルダーケース２Ｂの周壁３０Ｂに設けた位置決め機構６０Ｂを介して複数の引出線６を回路基板５Ｂの定位置に接続すると共に、コネクタ６９を接続した引出線６を外部に引き出す構造としている。 In the battery pack 200 shown in FIG. 14, the holder case 2B is provided on a battery arrangement area 21B composed of a frame portion 27B on which one secondary battery cell 1 is arranged and a terminal surface 1X of the secondary battery cell 1. It includes a board arrangement area 22B on which the circuit board 5B is arranged along the line. The substrate arrangement region 22B shown in the figure is provided with only the resin molding region 23B without providing the hollow portion, and the circuit board 5B is arranged using the resin molding region 23B as the substrate storage portion 26B. However, as shown by the chain line in the figure, the holder case may be provided with a hollow portion when the area is widened due to a design change of the substrate storage portion or the like. The circuit board 5B in the figure has a shape extending in the lateral direction of the holder case 2B, and a breaker 71, which is a protective element 7, is mounted on a side edge portion of the secondary battery cell 1 facing the terminal surface 1X. There is. Further, in this battery pack 200, a plurality of leader wires 6 are connected to fixed positions of the circuit board 5B via a positioning mechanism 60B provided on the peripheral wall 30B of the holder case 2B, and the leader wires 6 to which the connector 69 is connected are externally connected. It has a structure that pulls out to.

さらに、図１５に示す電池パック３００は、ホルダーケース２Ｃが、両端部にそれぞれ２個ずつの二次電池セル１が配置されるフレーム部２７Ｃで構成される電池配置領域２１Ｃを有すると共に、これらの電池配置領域２１Ｃの間に基板配置領域２２Ｃを設けて回路基板５を配置している。電池配置領域２１Ｃは、２個の二次電池セル１を収納できるように、３辺を囲う周壁３０Ｃと、隣接する二次電池セル１の間に配置される中間壁４０とで、２つの電池収納部２５を形成している。さらに、基板配置領域２２Ｃは、樹脂モールド部が形成される樹脂成形領域２３Ｃと、中空領域２４Ｃとが形成されている。図１５に示す電池パック３００は、図において前方に配置される２個の二次電池セル１の間に基板収納部２６を設けて回路基板５を配置し、図において後方に配置される２個の二次電池セル１の間には回路基板を配置することなく、ほぼ全体を中空領域２４Ｃとしている。 Further, in the battery pack 300 shown in FIG. 15, the holder case 2C has a battery arrangement region 21C composed of a frame portion 27C in which two secondary battery cells 1 are arranged at both ends thereof, and these. The circuit board 5 is arranged by providing the substrate arrangement area 22C between the battery arrangement areas 21C. The battery arrangement area 21C includes two batteries, a peripheral wall 30C surrounding three sides and an intermediate wall 40 arranged between adjacent secondary battery cells 1 so that two secondary battery cells 1 can be accommodated. The storage portion 25 is formed. Further, the substrate arrangement region 22C is formed with a resin molding region 23C on which a resin mold portion is formed and a hollow region 24C. In the battery pack 300 shown in FIG. 15, the circuit board 5 is arranged by providing the substrate accommodating portion 26 between the two secondary battery cells 1 arranged in the front in the drawing, and the two are arranged in the rear in the drawing. No circuit board is arranged between the secondary battery cells 1 of the above, and almost the entire area is a hollow region 24C.

また、図１５に示す電池パック３００においては、前方に配置される２個の二次電池セル１の端子面１Ｘと対向する位置に回路基板５を配置し、後方に配置される２個の二次電池セル１は、延長リード板１７を介して回路基板５に接続する構造としている。この電池パック３００は、延長リード板１７が配置される領域を樹脂成形領域２３Ｃとして、絶縁成形樹脂を充填することで、後方に配置される二次電池セル１の端子面１Ｘ及び延長リード板１７を樹脂モールド部にインサートして固定できる。 Further, in the battery pack 300 shown in FIG. 15, the circuit board 5 is arranged at a position facing the terminal surface 1X of the two secondary battery cells 1 arranged in the front, and the two two are arranged in the rear. The next battery cell 1 has a structure in which it is connected to the circuit board 5 via an extension lead plate 17. In this battery pack 300, the region where the extension lead plate 17 is arranged is set as the resin molding region 23C, and the terminal surface 1X and the extension lead plate 17 of the secondary battery cell 1 arranged behind the battery pack 300 are filled with the insulating molding resin. Can be inserted into the resin mold and fixed.

以上、本発明の実施形態乃至実施例を図面に基づいて説明した。ただ、上記の実施形態乃至実施例は、本発明の技術思想を具体化するための例示であって、本発明は上記のものに特定されない。また、本明細書は特許請求の範囲に示される部材を、実施形態の部材に特定するものでは決してない。特に実施形態に記載されている構成部品の寸法、材質、形状、その相対的配置等は特に特定的な記載がない限りは、本発明の範囲をそれのみに限定する趣旨ではなく、単なる説明例にすぎない。なお、各図面が示す部材の大きさや位置関係等は、説明を明確にするため誇張していることがある。さらに以上の説明において、同一の名称、符号については同一もしくは同質の部材を示しており、詳細説明を適宜省略する。さらに、本発明を構成する各要素は、複数の要素を同一の部材で構成して一の部材で複数の要素を兼用する態様としてもよいし、逆に一の部材の機能を複数の部材で分担して実現することもできる。 The embodiments or examples of the present invention have been described above with reference to the drawings. However, the above-described embodiments to examples are examples for embodying the technical idea of the present invention, and the present invention is not specified as described above. Further, the present specification does not specify the members shown in the claims as the members of the embodiment. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the components described in the embodiments are not intended to limit the scope of the present invention to the specific description unless otherwise specified, and are merely explanatory examples. It's just that. The size and positional relationship of the members shown in each drawing may be exaggerated to clarify the explanation. Further, in the above description, members of the same or the same quality are shown with the same name and reference numeral, and detailed description thereof will be omitted as appropriate. Further, each element constituting the present invention may be configured such that a plurality of elements are composed of the same member and the plurality of elements are combined with one member, or conversely, the function of one member is performed by the plurality of members. It can also be shared and realized.

本発明の電池パックは、薄型の二次電池セルと回路基板を同一平面に配置して強固に連結できるので、薄くて高電圧や高電池容量の電池パックが要求されるノート型パソコンやタブレットなどの携帯電子機器に好適に使用される。 Since the battery pack of the present invention can be firmly connected by arranging a thin secondary battery cell and a circuit board on the same plane, a notebook computer or tablet that requires a thin battery pack with a high voltage and a high battery capacity can be used. Suitable for portable electronic devices.

１００、２００、３００…電池パック
１…二次電池セル
１Ａ…主面
１Ｘ…端子面
２、２Ｂ、２Ｃ…ホルダーケース
４…樹脂モールド部５、５Ｂ…回路基板
６…引出線
６ａ…芯線
７…保護素子
８…外装シート
１０…電極
１０Ａ…第１電極
１０Ｂ…第２電極
１１…外装缶
１２…封口板
１３…凸部電極
１４…クラッド板
１５…安全弁
１６…接続リード板
１６Ａ…第１接続リード板
１６Ｂ…第２接続リード板
１７…延長リード板
１９…連結機構
２１、２１Ｂ、２１Ｃ…電池配置領域
２２、２２Ｂ、２２Ｃ…基板配置領域
２３、２３Ｂ、２３Ｃ…樹脂成形領域
２４、２４Ｃ…中空領域
２５…電池収納部
２６、２６Ｂ…基板収納部
２７、２７Ｂ、２７Ｃ…フレーム部
２８…中空室
２９…樹脂注入ガイド
２９ａ…注入孔
３０、３０Ｂ、３０Ｃ…周壁
３１…表面プレート
３２…底面プレート
３３…区画壁
３４…補強リブ
３５…保持壁
３６…係止リブ
３６ａ…垂直リブ
３６ｂ…水平リブ
３７…係止フック
３８…突出片
３９…通路壁
４０…中間壁
４１…溝部
４２…遮蔽溝
５１…切欠部
５２…接続ランド
５２Ａ…第１接続ランド
５２Ｂ…第２接続ランド
５３…接続プレート
５３Ａ…第１接続プレート
５３Ｂ…第２接続プレート５４…接続ライン
５５…接続部
５６…係止部
５６ａ…スリット凹部
５６ｂ…係止凹部
６０、６０Ｂ…位置決め機構
６１…櫛状リブ
６２…ガイド溝
６３…上端開口
６４…円形溝
６６…引き出し凹部
６９…コネクタ
７１…ブレーカ
７１Ａ…リード板
７１Ｂ…リード板
７１Ｘ…本体部
７２…ヒューズ
９９…遮蔽リブ100, 200, 300 ... Battery pack 1 ... Secondary battery cell 1A ... Main surface 1X ... Terminal surface 2, 2B, 2C ... Holder case 4 ... Resin mold part 5, 5B ... Circuit board 6 ... Leader wire 6a ... Core wire 7 ... Protective element 8 ... Exterior sheet 10 ... Electrode 10A ... First electrode 10B ... Second electrode 11 ... Exterior can 12 ... Seal plate 13 ... Convex electrode 14 ... Clad plate 15 ... Safety valve 16 ... Connection lead plate 16A ... First connection lead Plate 16B ... Second connection lead plate 17 ... Extension lead plate 19 ... Connection mechanism 21, 21B, 21C ... Battery arrangement area 22, 22B, 22C ... Substrate arrangement area 23, 23B, 23C ... Resin molding area 24, 24C ... Hollow area 25 ... Battery storage 26, 26B ... Board storage 27, 27B, 27C ... Frame 28 ... Hollow chamber 29 ... Resin injection guide 29a ... Injection holes 30, 30B, 30C ... Peripheral wall 31 ... Surface plate 32 ... Bottom plate 33 ... Partition wall 34 ... Reinforcing rib 35 ... Holding wall 36 ... Locking rib 36a ... Vertical rib 36b ... Horizontal rib 37 ... Locking hook 38 ... Protruding piece 39 ... Passage wall 40 ... Intermediate wall 41 ... Groove 42 ... Shielding groove 51 ... Notch Part 52 ... Connection land 52A ... First connection land 52B ... Second connection land 53 ... Connection plate 53A ... First connection plate 53B ... Second connection plate 54 ... Connection line 55 ... Connection part 56 ... Locking part 56a ... Slit recess 56b ... Locking recesses 60, 60B ... Positioning mechanism 61 ... Comb-shaped rib 62 ... Guide groove 63 ... Upper end opening 64 ... Circular groove 66 ... Drawer recess 69 ... Connector 71 ... Breaker 71A ... Lead plate 71B ... Lead plate 71X ... Main body 72 ... Hughes 99 ... Shielding ribs

Claims (7)

外形を幅よりも厚さが小さい角型とし、端子面を有する薄型の二次電池セルと、
前記二次電池セルと電気的に接続され、保護回路を実装した回路基板と、
前記二次電池セルと前記回路基板を収納するホルダーケースと、
前記ホルダーケースに収納された前記回路基板をインサート成形してなる樹脂モールド部と
を備え、
前記ホルダーケースは、
前記二次電池セルが配置される電池配置領域と、
前記回路基板が配置される基板配置領域とを同一平面に有しており、
前記回路基板が、前記電池配置領域に配置される該二次電池セルの前記端子面に近接するように前記基板配置領域に配置されると共に、
前記電池配置領域に配置された該二次電池セルの端子面の一部または全体と、前記基板配置領域に配置された該回路基板が絶縁成形樹脂に埋設されて前記樹脂モールド部が形成され、
前記基板配置領域は、前記回路基板が配置されて、前記樹脂モールド部が形成される樹脂成形領域と、前記樹脂モールド部が形成されない中空領域を備えており、前記樹脂成形領域と前記中空領域とを区画壁で区画してなることを特徴とする電池パック。 A thin secondary battery cell with a square shape whose outer shape is smaller than the width and has a terminal surface,
A circuit board that is electrically connected to the secondary battery cell and has a protection circuit mounted on it.
A holder case for accommodating the secondary battery cell and the circuit board,
A resin mold portion formed by insert molding the circuit board housed in the holder case is provided.
The holder case
The battery arrangement area in which the secondary battery cell is arranged and
It has a board placement area on which the circuit board is placed on the same plane.
The circuit board is arranged in the board arrangement area so as to be close to the terminal surface of the secondary battery cell arranged in the battery arrangement area, and is also arranged.
A part or the whole of the terminal surface of the secondary battery cell arranged in the battery arrangement area and the circuit board arranged in the substrate arrangement area are embedded in an insulating molding resin to form the resin mold portion .
The substrate arrangement region includes a resin molding region in which the circuit board is arranged and the resin mold portion is formed, and a hollow region in which the resin mold portion is not formed. A battery pack characterized by being partitioned by a partition wall. 請求項１に記載の電池パックであって、
前記二次電池セルを複数備えており、
前記ホルダーケースの両端部に前記電池配置領域を配置すると共に、対向する該電池配置領域の間に前記基板配置領域を配置してなる電池パック。 The battery pack according to claim 1.
It is equipped with a plurality of the secondary battery cells.
A battery pack in which the battery arrangement area is arranged at both ends of the holder case, and the substrate arrangement area is arranged between the opposite battery arrangement areas. 請求項１から２のいずれか一に記載の電池パックであって、
前記電池配置領域が、前記二次電池セルを収納するフレーム部を、該二次電池セルの外周に沿って備えており、
前記フレーム部と該二次電池セルとを外装シートで被覆して固定してなる電池パック。 The battery pack according to any one of claims 1 to 2.
The battery arrangement area includes a frame portion for accommodating the secondary battery cell along the outer circumference of the secondary battery cell.
A battery pack in which the frame portion and the secondary battery cell are covered with an exterior sheet and fixed. 請求項１から３のいずれか一に記載の電池パックであって、
前記基板配置領域に、絶縁成形樹脂を注入するための樹脂注入ガイドを形成してなる電池パック。 The battery pack according to any one of claims 1 to 3.
A battery pack in which a resin injection guide for injecting an insulating molding resin is formed in the substrate arrangement region. 請求項１から４のいずれか一に記載の電池パックであって、
前記樹脂モールド部の表面に、複数列の溝部が形成されてなる電池パック。 The battery pack according to any one of claims 1 to 4.
A battery pack in which a plurality of rows of grooves are formed on the surface of the resin mold portion. 請求項５に記載の電池パックであって、
前記複数列の溝部が、前記樹脂モールド部にインサートされる前記回路基板の長手方向に沿って互いに平行に形成されてなる電池パック。 The battery pack according to claim 5.
A battery pack in which the plurality of rows of grooves are formed parallel to each other along the longitudinal direction of the circuit board to be inserted into the resin mold portion. 請求項１から６のいずれか一に記載の電池パックであって、
前記ホルダーケースが、耐熱温度を７０℃以上とする樹脂で成形されると共に、
前記樹脂モールド部を形成する絶縁成形樹脂が、７０℃以下において溶融状態にある熱可塑性樹脂である電池パック。
The battery pack according to any one of claims 1 to 6.
The holder case is molded with a resin having a heat resistant temperature of 70 ° C. or higher, and is also molded.
A battery pack in which the insulating molding resin forming the resin mold portion is a thermoplastic resin in a molten state at 70 ° C. or lower.
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