JP3471005B2 - Battery pack - Google Patents
Battery packInfo
- Publication number
- JP3471005B2 JP3471005B2 JP2000291880A JP2000291880A JP3471005B2 JP 3471005 B2 JP3471005 B2 JP 3471005B2 JP 2000291880 A JP2000291880 A JP 2000291880A JP 2000291880 A JP2000291880 A JP 2000291880A JP 3471005 B2 JP3471005 B2 JP 3471005B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- battery pack
- circuit board
- pack
- secondary battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Battery Mounting, Suspending (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、複数個の二次電池
と二次電池の充放電制御等に必要な回路を有する電池パ
ック用の回路基板を設けた電池パックに関するものであ
る。
【０００２】
【従来の技術】電池を電源とした機器は、小型あるいは
携帯用の機器においてひろく用いられている。これらの
機器においては、二次電池を使用する場合には必要とす
る電源容量に応じた着脱自在の電池パックが用いられて
いる。電池パックは、電気絶縁性の合成樹脂製等の部材
からなる容器中に複数個の単電池と、これら単電池を所
望の電圧あるいは電流が出力可能なように導電接続する
とともに、電池の充電時あるいは放電時の保護用回路等
を有した電池パック用回路基板を有している。
【０００３】電池パック用回路基板は、基板上に各種の
電子部品を搭載しているので、電池パックの壁面に大型
の電子部品用の凹所を形成したり、あるいは複数の電池
の間の空間に配置する等の方法によって電池パックの空
間を有効利用すること等が提案されている。ところが、
このような方法では、逃がし用凹部によって電池パック
に凹凸が生じたり、回路基板として使用する可撓性の基
板に屈曲による変形を与える結果、ハンダ付部分あるい
は電子部品に力が加わり、信頼性等において問題が生じ
る可能性があった。
【０００４】そこで、特開平７−２２００７号公報にお
いては、図３に示すように、複数個の二次電池からなる
電池を有する電池パック１において、複数個の円筒形二
次電池２はリード板３によって導電接続されており、二
次電池上に載置されるフレキシブルプリント基板４は、
電子部品５を搭載しており、これらを電池パックの下容
器６Ｂに入れて上部蓋体７によって覆って電池パックを
形成している。そして、フレキシブルプリント基板４に
はスリット８を設けて作製した可撓部９に電子部品５を
搭載し、電子部品を電池間に形成される空間に位置させ
て電池パック内部の空間を有効に利用した電池パックが
提案されている。ところが、このような方法において
も、電池の充放電制御に必要な回路基板は、依然として
パック内壁面との間に位置し、パック内部の空間を占め
るとともに、二次電池および外部回路との接続をフレキ
シブルプリント基板上において行うものであるために、
フレキシブルプリント基板には、接続部分の面積を必要
とし、また電池パックの組立工程においても組立工程数
が多いという問題点があった。
【０００５】
【発明が解決しようとする課題】本発明は、電池パック
の容積利用率が高く、外形が小さな電池パックを提供す
ることを課題とするものである。
【０００６】
【課題を解決するための手段】本発明の課題は、複数個
の円筒形二次電池を有する電池パックにおいて、電池パ
ック用回路基板が、隣接する円筒形二次電池の曲面と隣
接する円筒形二次電池の曲面に接する一つの平面との間
に形成される空間のみに存在し、該回路基板の導電接続
タブは、円筒形二次電池表面に配置されている電池パッ
クによって解決することができる。回路基板の導電接続
タブは、二次電池の電極端子に接続した導電タブ、外部
接続タブと二次電池表面において配置されている電池パ
ックである。また、回路基板に接続した導電接続タブを
電池パックの外部接続端子とした電池パックである。
【０００７】
【発明の実施の形態】本発明の電池パックは、複数の円
筒形二次電池を設けた電池パックにおいて、電池の充放
電制御手段等の電池パック用回路基板の設置と導電接続
に特徴を有する電池パックに関するものである。電池パ
ックには、二次電池とともに電池パック用回路基板が設
けられている。電池パック用回路基板は、二次電池の充
放電において不可欠な充放電制御手段とともに二次電池
の放置時の外部端子の短絡、電池の異常な発熱、電池の
劣化、電池の電解液の漏洩等のあらゆる危険な事態から
電池および電池使用機器を保護するために設けられてい
る電池の保護手段、あるいは電池の残存容量の把握等の
二次電池において生じる可能性の様々な危険性のある事
態に対処するための回路、電池の状態の把握等の二次電
池を用いるうえで必要な電子回路から構成されている。
本発明においては、電池パックに不可欠な電池パック用
回路基板を隣接する円筒形二次電池の曲面によって形成
される空間のみに配置し、電池パック用回路基板と二次
電池あるいは外部回路とを導電接続する導電接続タブを
二次電池の表面に配置したものであり、容積効率を高め
るとともに電池パックの組立を容易にしたものである。
【０００８】以下に図面を参照して本発明を説明する。
図１は、本発明の電池パックの一実施例を説明する図で
あり、斜視図である。電池パック１は、複数個の円筒形
二次電池を２を有したものであり、電池パック用回路基
板１０は、隣接する円筒形二次電池２の曲面と、隣接す
る二次電池の両曲面に接する平面との間に形成される空
間に配置されている。隣接する円筒形二次電池の端子は
導電接続用タブ（図示せず）によって直列に接続されて
おり、電池の正極端子１１および電池の負極端子１２に
接続した、正極タブ１３および負極タブ１４は、回路基
板１０から延びた電池側正極タブ１５および電池側負極
タブ１６と電池表面において導電接続されている。
【０００９】また、回路基板１０から延びる機器側正極
タブ１７および機器側負極タブ１８からなる導電接続タ
ブは電池表面に配置されており、電池パックの外部接続
端子（図示せず）に導電接続されている。また、回路基
板から延びる各タブ１５、１６、１７および１８は、そ
の一部を金めっき等の接点として良好な材料によってめ
っき処理して、電池パックの外部接続端子として使用し
ても良い。回路基板から電池表面へと延びる正極、およ
び負極のタブは、電池表面に台座１９を取り付けた後に
配置してタブの変形等に対処しても良い。台座１９は回
路基板から延びる各タブの一部を外部接続端子として使
用する場合には、正確な位置決めが可能となるので特に
有効である。以上のようにして作製した電池コアパック
２０を下部容器６に入れて上部蓋体（図示せず）によっ
て蓋をして電池パックを作製する。本発明の電池パック
において使用する回路基板１０は、可撓性部材から構成
されるフレキシブルプリント基板、可撓性のない基板の
いずれでも良い。また、図に示すように、隣接する二次
電池の曲面で形成される形状に合致させたＶ字形とした
ものであっても良い。
【００１０】本発明の電池パックは、回路基板からのタ
ブを接続端子として使用することができるので、基板上
に接続端子を別途設ける必要がなく、製造工程を簡素す
ることできるとともに、回路基板上での接続個所あるい
は接続面積の減少に伴い、回路基板として必要な面積を
小さくすることも可能となる。更に、電池パックの表面
の凹凸がなくなり、設計の自由度が向上するとともに、
組立工程での取り扱いが容易なものとなる。
【００１１】図２は、本発明の電池パックの他の実施例
を説明する図である。図２（Ａ）は本発明の電池パック
を説明する図であり、図２（Ｂ）は、電池パックを電池
使用機器への装着を説明する図である。電池パック１
は、上容器６Ａと下容器６Ｂからなる大きさが２２ｍｍ
×４０ｍｍ×７０ｍｍの直方体状の容器の内部に、直径
１８ｍｍ、長さ６５ｍｍの円筒型二次電池の２本を設
け、２本の円筒型二次電池の間に形成された曲面には、
電池パック用の回路基板を収容されており、上容器と下
容器を接着剤による接着、超音波溶接等による溶接によ
って接合されている。また、上容器６Ａには、充電装
置、電池使用回路との接続用の出力端子２１、電池電圧
が測定可能な電池電圧出力端子２２を設けられている。
電池パック１は、図２（Ｂ）に示すように、回転させて
電池使用機器２３の電池パック収納部２４に収納される
と、電池パックに設けた出力端子２１および電池出力端
子２２が電池パック収納部２４内に設けた接続端子２５
と導電接続して、電池使用機器との間に導電接続が形成
される。
【００１２】
【発明の効果】本発明の電池パックは、隣接する円筒形
二次電池の間に形成される空間の内部に電池パック用回
路基板を存在させ、円筒形二次電池および外部機器との
接続を回路基板から延びるタブによって円筒形二次電池
の表面において行ったので、電池パック内部の無効な空
間が減少するとともに、電池パックの組立工程も簡素化
することができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a circuit board for a battery pack having a plurality of secondary batteries and circuits necessary for controlling charging and discharging of the secondary batteries. Battery pack. [0002] Devices using a battery as a power source are widely used in small or portable devices. In these devices, when a secondary battery is used, a detachable battery pack according to a required power supply capacity is used. A battery pack is connected to a plurality of cells in a container made of a member made of an electrically insulating synthetic resin or the like, and the cells are conductively connected so that a desired voltage or current can be output. Alternatively, it has a circuit board for a battery pack having a circuit for protection during discharge and the like. [0003] The circuit board for a battery pack has various electronic components mounted on the substrate, and therefore, a recess for a large electronic component is formed on the wall surface of the battery pack, or a space between a plurality of batteries is formed. It has been proposed to effectively utilize the space of the battery pack by a method such as disposing the battery pack in a battery pack. However,
In such a method, unevenness is formed on the battery pack by the escape recess, or a flexible substrate used as a circuit board is deformed by bending, so that a force is applied to a soldered portion or an electronic component, and reliability is improved. Could cause problems. In Japanese Patent Application Laid-Open No. Hei 7-22007, as shown in FIG. 3, in a battery pack 1 having a plurality of secondary batteries, a plurality of cylindrical secondary batteries 2 are connected to a lead plate. 3, a flexible printed circuit board 4 mounted on the secondary battery,
The electronic components 5 are mounted, these are put in the lower container 6B of the battery pack, and are covered with the upper lid 7 to form the battery pack. Then, the electronic component 5 is mounted on the flexible portion 9 formed by providing the slit 8 on the flexible printed circuit board 4, and the electronic component is positioned in the space formed between the batteries to effectively use the space inside the battery pack. Battery packs have been proposed. However, even in such a method, the circuit board required for battery charge / discharge control is still located between the pack inner wall surface and occupies the space inside the pack, and also needs to be connected to the secondary battery and the external circuit. To be performed on a flexible printed circuit board,
The flexible printed circuit board has a problem that it requires an area of a connection portion and that the number of assembling steps is large in the assembling step of the battery pack. SUMMARY OF THE INVENTION It is an object of the present invention to provide a battery pack having a high capacity utilization factor and a small external shape. SUMMARY OF THE INVENTION An object of the present invention is to provide a battery pack having a plurality of cylindrical secondary batteries, wherein the battery pack circuit board is adjacent to the curved surface of the adjacent cylindrical secondary battery. The conductive connection tabs of the circuit board exist only in a space formed between the curved surface of the cylindrical secondary battery and a plane contacting the curved surface of the cylindrical secondary battery, and are solved by the battery pack disposed on the surface of the cylindrical secondary battery. can do. The conductive connection tab of the circuit board is a conductive tab connected to the electrode terminal of the secondary battery, an external connection tab, and a battery pack arranged on the surface of the secondary battery. Further, the battery pack has a conductive connection tab connected to the circuit board as an external connection terminal of the battery pack. DETAILED DESCRIPTION OF THE INVENTION A battery pack according to the present invention is a battery pack provided with a plurality of cylindrical secondary batteries, which is used for installing and electrically connecting a circuit board for a battery pack such as battery charge / discharge control means. The present invention relates to a battery pack having features. The battery pack is provided with a battery pack circuit board together with a secondary battery. The battery pack circuit board, together with charge / discharge control means indispensable for charging / discharging the secondary battery, short-circuits the external terminals when the secondary battery is left, abnormal heat generation of the battery, battery deterioration, leakage of battery electrolyte, etc. The battery protection measures provided to protect the battery and the battery-powered equipment from any dangerous situations described above, or various situations that may occur in the secondary battery such as grasping the remaining capacity of the battery. It is composed of a circuit for coping and an electronic circuit necessary for using the secondary battery for grasping the state of the battery.
In the present invention, the battery pack circuit board indispensable for the battery pack is arranged only in the space formed by the curved surface of the adjacent cylindrical secondary battery, and the battery pack circuit board and the secondary battery or the external circuit are electrically connected. The conductive connection tabs to be connected are arranged on the surface of the secondary battery, which improves the volumetric efficiency and facilitates the assembly of the battery pack. The present invention will be described below with reference to the drawings.
FIG. 1 is a diagram illustrating a battery pack according to an embodiment of the present invention, and is a perspective view. The battery pack 1 has a plurality of cylindrical secondary batteries 2, and the battery pack circuit board 10 includes a curved surface of an adjacent cylindrical secondary battery 2 and a curved surface of an adjacent secondary battery 2. Are arranged in a space formed between the plane and the plane that is in contact with. The terminals of adjacent cylindrical secondary batteries are connected in series by conductive connection tabs (not shown), and the positive electrode tab 13 and the negative electrode tab 14 connected to the positive electrode terminal 11 of the battery and the negative electrode terminal 12 of the battery are connected to each other. The battery-side positive electrode tab 15 and the battery-side negative electrode tab 16 extending from the circuit board 10 are conductively connected on the battery surface. A conductive connection tab extending from the circuit board 10 and comprising a device-side positive electrode tab 17 and a device-side negative electrode tab 18 is disposed on the battery surface, and is conductively connected to an external connection terminal (not shown) of the battery pack. ing. Each of the tabs 15, 16, 17 and 18 extending from the circuit board may be partially plated with a good material as a contact such as gold plating and used as an external connection terminal of the battery pack. The tabs of the positive electrode and the negative electrode extending from the circuit board to the surface of the battery may be arranged after the pedestal 19 is attached to the surface of the battery to deal with deformation of the tab. The pedestal 19 is particularly effective when a part of each tab extending from the circuit board is used as an external connection terminal, since accurate positioning is possible. The battery core pack 20 manufactured as described above is placed in the lower container 6 and covered with an upper cover (not shown) to manufacture a battery pack. The circuit board 10 used in the battery pack of the present invention may be either a flexible printed board made of a flexible member or a non-flexible board. Also, as shown in the figure, the secondary battery may have a V-shape that matches the shape formed by the curved surface of the adjacent secondary battery. In the battery pack of the present invention, tabs from the circuit board can be used as connection terminals, so that there is no need to separately provide connection terminals on the board, so that the manufacturing process can be simplified and the circuit board can be used. With the reduction of the connection points or connection areas in the above, the area required as a circuit board can be reduced. Furthermore, the unevenness on the surface of the battery pack is eliminated, and the degree of freedom in design is improved.
Handling in the assembly process is easy. FIG. 2 is a view for explaining another embodiment of the battery pack of the present invention. FIG. 2A is a diagram illustrating the battery pack of the present invention, and FIG. 2B is a diagram illustrating mounting of the battery pack on a battery-using device. Battery pack 1
Is 22 mm in size consisting of the upper container 6A and the lower container 6B.
Inside a rectangular parallelepiped container of × 40 mm × 70 mm, two cylindrical secondary batteries having a diameter of 18 mm and a length of 65 mm are provided, and a curved surface formed between the two cylindrical secondary batteries includes:
A circuit board for a battery pack is housed therein, and the upper container and the lower container are joined by bonding with an adhesive, ultrasonic welding, or the like. The upper container 6A is provided with a charging device, an output terminal 21 for connection to a battery use circuit, and a battery voltage output terminal 22 for measuring a battery voltage.
As shown in FIG. 2B, when the battery pack 1 is rotated and stored in the battery pack storage section 24 of the battery using device 23, the output terminal 21 and the battery output terminal 22 provided on the battery pack become Connection terminal 25 provided in storage section 24
And a conductive connection is formed between the battery and the battery-powered device. According to the battery pack of the present invention, a circuit board for a battery pack is provided inside a space formed between adjacent cylindrical secondary batteries, and the battery pack is connected to the cylindrical secondary battery and an external device. Is made on the surface of the cylindrical secondary battery by the tab extending from the circuit board, so that the useless space inside the battery pack is reduced and the battery pack assembling process can be simplified.
【図面の簡単な説明】
【図１】図１は、本発明の電池パックの一実施例を説明
する図である。
【図２】図２は、本発明の電池パックの他の実施例を説
明する図である。
【図３】図３は、従来の電池パックを説明する図であ
る。
【符号の説明】
１…電池パック、２…円筒型電池、３…リード板、４…
フレキシブルプリント基板、５…電子部品、６Ａ…上容
器、６Ｂ…下容器、７…上部蓋体、８…スリット、９…
可撓部、１０…電池パック用回路基板、１１…電池の正
極端子、１２…電池の負極端子、１３…正極タブ、１４
…負極タブ、１５…電池側正極タブ、１６…電池側負極
タブ、１７…機器側正極タブ、１８…機器側負極タブ、
１９…台座、２０…コアパック、２１…出力端子、２２
…電池電圧出力端子、２３…電池使用機器、２４…電池
パック収納部、２５…接続端子BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating an embodiment of a battery pack according to the present invention. FIG. 2 is a diagram illustrating another embodiment of the battery pack of the present invention. FIG. 3 is a diagram illustrating a conventional battery pack. [Description of Signs] 1 ... Battery pack, 2 ... Cylindrical battery, 3 ... Lead plate, 4 ...
Flexible printed circuit board, 5: electronic components, 6A: upper container, 6B: lower container, 7: upper lid, 8: slit, 9 ...
Flexible portion, 10: circuit board for battery pack, 11: positive electrode terminal of battery, 12: negative electrode terminal of battery, 13: positive electrode tab, 14
... negative electrode tab, 15 ... battery side positive electrode tab, 16 ... battery side negative electrode tab, 17 ... device side positive electrode tab, 18 ... device side negative electrode tab,
19 ... pedestal, 20 ... core pack, 21 ... output terminal, 22
... Battery voltage output terminal, 23 ... Battery using equipment, 24 ... Battery pack storage, 25 ... Connection terminal
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 2/10 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 7 , DB name) H01M 2/10
Claims (1)
ックにおいて、電池パック用の回路基板が、隣接する円
筒形二次電池の曲面と隣接する円筒形二次電池の曲面に
接する一つの平面との間に形成される空間のみに存在
し、該回路基板の導電接続タブは、円筒形二次電池表面
に配置されていることを特徴とする電池パック。(57) [Claim 1] In a battery pack having a plurality of cylindrical secondary batteries, a circuit board for the battery pack is formed so that a curved surface of an adjacent cylindrical secondary battery is adjacent to a curved surface of the adjacent cylindrical secondary battery. A battery pack, wherein the battery pack exists only in a space formed between the secondary battery and one flat surface in contact with a curved surface of the secondary battery, and the conductive connection tab of the circuit board is disposed on the surface of the cylindrical secondary battery. .
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| Application Number | Priority Date | Filing Date | Title |
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| JP2000291880A JP3471005B2 (en) | 2000-09-26 | 2000-09-26 | Battery pack |
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| JP2000291880A JP3471005B2 (en) | 2000-09-26 | 2000-09-26 | Battery pack |
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| JP2002100331A JP2002100331A (en) | 2002-04-05 |
| JP3471005B2 true JP3471005B2 (en) | 2003-11-25 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9088042B2 (en) * | 2009-07-08 | 2015-07-21 | Samsung Sdi Co., Ltd. | Battery pack having elongate curved lead plates |
| KR101688580B1 (en) * | 2013-09-30 | 2016-12-21 | 주식회사 엘지화학 | Battery Cell with Curved Surface |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001291500A (en) | 2000-04-07 | 2001-10-19 | Sanyo Electric Co Ltd | Battery pack |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001291500A (en) | 2000-04-07 | 2001-10-19 | Sanyo Electric Co Ltd | Battery pack |
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| JP2002100331A (en) | 2002-04-05 |
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