JP4593930B2 - Battery pack - Google Patents

Battery pack Download PDF

Info

Publication number
JP4593930B2
JP4593930B2 JP2004011653A JP2004011653A JP4593930B2 JP 4593930 B2 JP4593930 B2 JP 4593930B2 JP 2004011653 A JP2004011653 A JP 2004011653A JP 2004011653 A JP2004011653 A JP 2004011653A JP 4593930 B2 JP4593930 B2 JP 4593930B2
Authority
JP
Japan
Prior art keywords
battery
secondary battery
circuit board
connection
battery pack
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
Application number
JP2004011653A
Other languages
Japanese (ja)
Other versions
JP2005209366A (en
Inventor
克巳 高津
俊彦 市瀬
聡 倉中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Corp, Matsushita Electric Industrial Co Ltd filed Critical Panasonic Corp
Priority to JP2004011653A priority Critical patent/JP4593930B2/en
Priority to EP05703777A priority patent/EP1727223A4/en
Priority to PCT/JP2005/000540 priority patent/WO2005069408A1/en
Priority to US10/574,349 priority patent/US7846577B2/en
Publication of JP2005209366A publication Critical patent/JP2005209366A/en
Application granted granted Critical
Publication of JP4593930B2 publication Critical patent/JP4593930B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

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

  • Portable Power Tools In General (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Description

本発明は、電動ドリルなどの電動工具の電池電源として好適な電池パックに関するものである。   The present invention relates to a battery pack suitable as a battery power source for an electric tool such as an electric drill.

電動工具のハイパワー化に伴ってその電池電源として構成された電池パックは大きな放電電力が出力できるものが要求される。この要求を満たすために多数の二次電池をパックケース内に収めた電池パックが用いられている。しかし、電動工具は手持ち操作されるものであるため、電池パックはより小型でより軽量なものが求められている。一般的には電池としてニッケル−カドミウム蓄電池あるいはニッケル−水素蓄電池が用いられているが、重量エネルギー密度や体積エネルギー密度の点で充分に満足できるものではなく、多数の二次電池を必要とするため電池パックが大きく重くなるため電動工具の操作性が低下する課題や、多数の電池が密集配置されるため電池の放熱性に課題を有していた。   A battery pack configured as a battery power source with a high power of an electric tool is required to output a large discharge power. In order to satisfy this requirement, a battery pack in which a large number of secondary batteries are housed in a pack case is used. However, since the power tool is operated by hand, the battery pack is required to be smaller and lighter. Generally, nickel-cadmium storage batteries or nickel-hydrogen storage batteries are used as batteries, but they are not satisfactory in terms of weight energy density and volumetric energy density, and require a large number of secondary batteries. Since the battery pack is large and heavy, there is a problem that the operability of the electric tool is lowered, and a large number of batteries are densely arranged, which causes a problem in heat dissipation of the battery.

前記ニッケル−カドミウム蓄電池やニッケル−水素蓄電池に比して重量エネルギー密度及び体積エネルギー密度が優れた二次電池としてリチウムイオン二次電池などの非水電解液二次電池が知られており、これを用いて電池パックを構成すると、同一出力電力における電池パックの小型軽量化を促進することが可能である。中でも扁平角形のリチウムイオン二次電池を用いると、円筒形の電池を用いた場合よりスペース効率に優れた電池パックの構成が可能となる。   Non-aqueous electrolyte secondary batteries such as lithium ion secondary batteries are known as secondary batteries having superior weight energy density and volumetric energy density compared to the nickel-cadmium storage battery and nickel-hydrogen storage battery. When the battery pack is configured by using the battery pack, it is possible to promote reduction in size and weight of the battery pack at the same output power. In particular, when a flat rectangular lithium ion secondary battery is used, it is possible to construct a battery pack that is more space efficient than when a cylindrical battery is used.

しかし、リチウムイオン二次電池のような非水電解液を用いる二次電池は、過充電や過放電により劣化や発熱を生じやすいので、電池保護回路や充放電制御回路を設ける必要があり、これらの回路を構成した回路基板を二次電池と共にパックケース内に収容して電池パックが構成される。このような二次電池と回路基板とをパックケース内に収容した電池パックは多数の提案がなされており、例えば、特許文献１に示す電池パックなどが知られている。
特開２００１−３１３０１５号公報（第３〜５頁、図１） However, secondary batteries using non-aqueous electrolytes such as lithium ion secondary batteries tend to deteriorate or generate heat due to overcharge or overdischarge, so it is necessary to provide a battery protection circuit and charge / discharge control circuit. A circuit board that constitutes the circuit is housed in a pack case together with a secondary battery to constitute a battery pack. Many proposals have been made for a battery pack in which such a secondary battery and a circuit board are accommodated in a pack case. For example, a battery pack shown in Patent Document 1 is known.
Japanese Patent Laid-Open No. 2001-313015 (pages 3 to 5, FIG. 1)

電動工具の電池電源のように比較的大きな電力が要求される電池パックの場合では多数の二次電池が用いられるため、各二次電池を回路基板に接続するための配線構造が複雑になる課題があった。   In the case of a battery pack that requires a relatively large amount of power, such as a battery power source of an electric tool, a large number of secondary batteries are used, so that the wiring structure for connecting each secondary battery to a circuit board becomes complicated was there.

本発明が目的とするところは、複数の二次電池と回路基板とを簡易に接続する構造を設けて一体化した電池パックを提供することにある。   An object of the present invention is to provide a battery pack integrated by providing a structure for easily connecting a plurality of secondary batteries and a circuit board.

上記目的を達成するための本発明は、電池缶内に極板群及び電解液を収容して開口端を封口板によって封口し、前記封口板に極端子が設けられてなる複数の二次電池と、各二次電池の動作状態を管理する電池管理回路を構成した回路基板とをパックケース内に収容してなる電池パックであって、前記複数の二次電池をその封口板側を同一方向にしてフレームによって保持し、各二次電池の極端子に接続板を接合して複数の二次電池を直列及び／又は並列接続し、前記接続板に設けられた接続突起が接続穴に挿入されるように前記回路基板を取り付け、接続突起と回路基板とが接合されてなることを特徴とする。   In order to achieve the above object, the present invention provides a plurality of secondary batteries in which an electrode plate group and an electrolytic solution are accommodated in a battery can, an opening end is sealed with a sealing plate, and electrode terminals are provided on the sealing plate. And a circuit board that constitutes a battery management circuit that manages the operation state of each secondary battery in a pack case, wherein the plurality of secondary batteries have the sealing plate side in the same direction The connection plate is joined to the pole terminal of each secondary battery to connect a plurality of secondary batteries in series and / or in parallel, and the connection protrusion provided on the connection plate is inserted into the connection hole. The circuit board is attached as described above, and the connection protrusion and the circuit board are joined.

上記構成によれば、複数の二次電池はフレームによって一体化され、封口板側を保持するフレーム内に位置する封口板に形成された正極及び負極の極端子に接合して複数の二次電池を直列及び／又は並列に接続する接続板に形成された接続突起に回路基板を接合すると、複数の二次電池と回路基板とが一体化され、各二次電池は回路基板に接続され、回路基板上に構成された電池管理回路は各二次電池の電圧を検出して充放電制御や電池保護等を行うことができる。この構成では複数の二次電池と回路基板との接続にリード配線が伴なわず、複数の二次電池と回路基板とを一体化する構造により電気的接続も実施できる。   According to the above configuration, the plurality of secondary batteries are integrated by the frame and joined to the positive and negative electrode terminals formed on the sealing plate located in the frame that holds the sealing plate side. When the circuit board is joined to the connection protrusion formed on the connection plate that connects the two in series and / or in parallel, the plurality of secondary batteries and the circuit board are integrated, and each secondary battery is connected to the circuit board, and the circuit A battery management circuit configured on the substrate can detect the voltage of each secondary battery and perform charge / discharge control, battery protection, and the like. In this configuration, lead wires are not involved in the connection between the plurality of secondary batteries and the circuit board, and electrical connection can also be implemented by a structure in which the plurality of secondary batteries and the circuit board are integrated.

上記構成において、二次電池は、扁平角形に形成され、その最大面積平坦面が所定間隔を隔てて互いに対面するようにフレームによって保持することにより、各二次電池の間に空気流通路が形成されて放熱が促進され、この電池ブロックに回路基板を接合すると、主要構成要素がブロック状に形成されるので、これをパックケース内に収容すると、堅固な構造を簡易に構成することが可能となり、電動工具などの過酷な使用環境に曝される電池パックとして好適なものが得られる。   In the above configuration, the secondary battery is formed in a flat rectangular shape, and an air flow passage is formed between each secondary battery by holding the frame so that the flat area of the maximum area faces each other at a predetermined interval. When heat dissipation is promoted and the circuit board is joined to this battery block, the main components are formed in a block shape. If this is housed in the pack case, a solid structure can be easily constructed. Thus, a battery pack suitable for a severe use environment such as an electric tool can be obtained.

本発明によれば、複数の二次電池と回路基板との接続にリード配線が伴なわず、複数の二次電池と回路基板とを一体化する構造により電気的接続も実施できる。また、二次電池として扁平角形に形成されたものを適用し、その最大面積平坦面が所定間隔を隔てて互いに対面するようにフレームによって保持することにより、各二次電池の間に空気流通路が形成されて放熱が促進され、この電池ブロックに回路基板を接合すると、主要構成要素がブロック状に形成されるので、これをパックケース内に収容すると、堅固な構造を簡易に構成することが可能となり、電動工具などの過酷な使用環境に曝される電池パックとして好適なものが得られる。   According to the present invention, the lead wires are not associated with the connection between the plurality of secondary batteries and the circuit board, and the electrical connection can be implemented by the structure in which the plurality of secondary batteries and the circuit board are integrated. Further, by applying a flat battery as a secondary battery and holding it by a frame so that the flat surface of the maximum area faces each other at a predetermined interval, an air flow passage is provided between the secondary batteries. When the circuit board is joined to this battery block, the main components are formed in the shape of a block. If this is housed in the pack case, a solid structure can be easily configured. This makes it possible to obtain a battery pack that is suitable for use in harsh usage environments such as electric tools.

図１は、実施形態に係る電池パック１を示すもので、図９に示すように、電動工具Ａに装着して電動工具Ａの駆動電源となるように構成されている。また、電動工具Ａの使用により電池容量が減少したときには、電動工具Ａから取り外し、図１０に示すように、充電器Ｂに装填することにより、充電することができる。電動工具Ａ又は充電器Ｂへの装着は、パックケース５の上方に設けられた装着部２０の両側面に形成された摺動溝２０ａに電動工具Ａ又は充電器Ｂに設けられた凸条部が嵌入するように電池パック１を押し込むと、装着部２０の中央に保持されたコネクタケース１２に設けられた接続プラグ１４が電動工具Ａ又は充電器Ｂのソケットに挿入されて電気的接続がなされると共に電池パック１は装着される。   FIG. 1 shows a battery pack 1 according to the embodiment. As shown in FIG. 9, the battery pack 1 is mounted on the electric power tool A to be a driving power source for the electric power tool A. When the battery capacity decreases due to the use of the electric power tool A, the battery can be charged by being removed from the electric power tool A and loaded in the charger B as shown in FIG. Mounting to the electric power tool A or the charger B is performed on the sliding grooves 20a formed on both side surfaces of the mounting portion 20 provided above the pack case 5, and the ridges provided on the electric power tool A or the charger B. When the battery pack 1 is pushed so as to be inserted, the connection plug 14 provided in the connector case 12 held in the center of the mounting portion 20 is inserted into the socket of the electric power tool A or the charger B to be electrically connected. In addition, the battery pack 1 is attached.

この電池パック１は、図２に分解図示するように、パックケース５内に１０個の二次電池２と、この二次電池２の充放電制御や電池保護制御などを行う電池管理回路を構成した回路基板３とを収容し、二次電池２の放熱を促す送風ファン４を一体に組み込んで構成されている。   As shown in an exploded view in FIG. 2, the battery pack 1 includes 10 secondary batteries 2 in a pack case 5 and a battery management circuit that performs charge / discharge control, battery protection control, and the like of the secondary battery 2. The blower fan 4 that accommodates the circuit board 3 and promotes heat dissipation of the secondary battery 2 is integrally incorporated.

前記二次電池２は、扁平直方体の外形に形成されたリチウムイオン二次電池が適用されており、図２に示すように、この二次電池２の最大面積平坦面がパックケース５の底面に対して垂直方向になり、所定間隔を隔てて互いに対向するようにして、１０個の二次電池２が並列配置されている。このように１０個の二次電池２を所定間隔を隔てて並列配置された状態に保持するために、図４に示すように、二次電池２の長手方向中央部分の断面積に対応する開口形状寸法の電池収容部（開口部）１７を１０箇所に形成したセンターフレーム７により二次電池２の中央部分が保持され、二次電池２の両端がそれぞれ端子側フレーム６、底側フレーム８で保持されている。   As the secondary battery 2, a lithium ion secondary battery formed in the shape of a flat rectangular parallelepiped is applied. As shown in FIG. 2, the flat surface of the maximum area of the secondary battery 2 is formed on the bottom surface of the pack case 5. The ten secondary batteries 2 are arranged in parallel so as to be perpendicular to each other and face each other with a predetermined interval. Thus, in order to hold the ten secondary batteries 2 in a state of being arranged in parallel at a predetermined interval, as shown in FIG. 4, the opening corresponding to the cross-sectional area of the central portion in the longitudinal direction of the secondary battery 2 The center portion of the secondary battery 2 is held by the center frame 7 formed with 10 battery housing portions (openings) 17 of the shape and dimensions, and both ends of the secondary battery 2 are the terminal side frame 6 and the bottom side frame 8 respectively. Is retained.

図３に示すように、二次電池２は、有底角筒に形成された電池缶２４内に、長尺に形成した正極板と負極板とをセパレータを介して巻回した巻回型極板群、もしくは複数の正極板と負極板とをセパレータを介して積層した積層型極板群を挿入し、電池缶２４の開口端に封口板２３を溶接して電池缶２４の開口端を封口し、電池缶２４内に電解液を注入して電池缶２４内が密閉される。前記封口板２３には正極板に接続した正極端子２１が封口板２３と電気的に絶縁して設けられ、封口板２３及び電池缶２４は二次電池２の負極端子を構成する。   As shown in FIG. 3, the secondary battery 2 is a wound type electrode in which a positive electrode plate and a negative electrode plate formed in a long shape are wound through a separator in a battery can 24 formed in a bottomed rectangular tube. A plate group or a laminated electrode plate group in which a plurality of positive and negative electrode plates are laminated via a separator is inserted, and a sealing plate 23 is welded to the opening end of the battery can 24 to seal the opening end of the battery can 24 Then, the electrolytic solution is injected into the battery can 24 to seal the inside of the battery can 24. A positive electrode terminal 21 connected to the positive electrode plate is provided on the sealing plate 23 so as to be electrically insulated from the sealing plate 23, and the sealing plate 23 and the battery can 24 constitute a negative electrode terminal of the secondary battery 2.

二次電池２は大電流の放電や過充電等の原因により温度上昇すると、熱膨張や電解液の気化などによって電池缶２４に膨らみが生じ、それは電池缶２４の側面となる最大面積平坦面に顕著に現れる。電池缶２４内に収容された極板群は、それが巻回型であっても積層型であっても正極板と負極板とがセパレータを介して積層された状態に電池缶２４の両側の最大面積平坦面の間で挟圧され、セパレータに含浸された状態で存在する電解液中を移動するイオンが正極板と負極板との間で行き来することにより充放電反応がなされる。電池缶２４に膨らみが生じると、積層間の密着状態が損なわれ、積層間に隙間が発生すると、イオン移動度に不具合が生じ、充放電反応が充分になされない状態となる恐れがある。   When the temperature of the secondary battery 2 rises due to a large current discharge or overcharge, the battery can 24 swells due to thermal expansion, vaporization of the electrolyte, or the like. Appears prominently. Whether the electrode plate group accommodated in the battery can 24 is a wound type or a laminated type, the positive electrode plate and the negative electrode plate are laminated on both sides of the battery can 24 with a separator interposed therebetween. The charge / discharge reaction is performed by ions moving between the positive electrode plate and the negative electrode plate moving between the electrolytes that are sandwiched between the flat surfaces of the maximum area and impregnated in the separator. When the battery can 24 swells, the contact state between the stacks is impaired, and when a gap is generated between the stacks, the ion mobility may be inferior and the charge / discharge reaction may not be sufficiently performed.

図４に示すように、センターフレーム７は、１０個の二次電池２をそれぞれ電池収納部１７に挿入すると、二次電池２をその電池缶２４の略中央部分を周囲から囲んだ状態に保持するので、二次電池２は膨らみが生じないように挟圧された状態となる。因みに、本実施形態に適用した二次電池２の短手方向幅は１０ｍｍであり、電池収容部１７の短手方向幅は１０．４ｍｍに形成されているので、組み立て当初では二次電池２を電池収容部１７にスムーズに挿入でき、電池缶２４の膨らみは電池収容部１７の幅で規制されるため、電池缶２４の膨らみによる二次電池２の性能低下は抑制される。   As shown in FIG. 4, the center frame 7 holds the secondary battery 2 in a state in which a substantially central portion of the battery can 24 is surrounded from the periphery when each of the ten secondary batteries 2 is inserted into the battery housing portion 17. Therefore, the secondary battery 2 is in a state of being pinched so as not to swell. Incidentally, since the width of the secondary battery 2 applied to the present embodiment is 10 mm and the width of the battery housing portion 17 is 10.4 mm, the secondary battery 2 is initially assembled. Since the battery can 24 can be smoothly inserted and the swelling of the battery can 24 is regulated by the width of the battery housing 17, the performance degradation of the secondary battery 2 due to the swelling of the battery can 24 is suppressed.

１０個の二次電池２はそれぞれを同一方向にしてセンターフレーム７の各電池収容部１７に挿入され、二次電池２の底面側には電池缶２４の底部形状寸法に対応する形状寸法の底部収容凹部１８が並列形成された底側フレーム８が装着される。二次電池２の封口板２３側には、図５（ｂ）に示すように、内側に二次電池２の封口板２３側を収容する封口部収容凹部１９が形成され、その凹部底面には正極端子２１を貫通させる正極接続窓２５と、封口板２３の一部板面を覗かせた負極接続窓２６とが形成された端子側フレーム６が装着される。この端子側フレーム６の外側には、図５（ａ）に示すように、回路基板３を収容する基板収容凹部２８と、１０個の二次電池２を直列接続すると共に各二次電池２を回路基板３に接続する直列接続板９、正極接続板１０、負極接続板１１を収容する接続板収容凹部２７とが形成されている。接続板収容凹部２７の底面には、前記正極接続窓２５と負極接続窓２６とが開口している。   The ten secondary batteries 2 are inserted into the respective battery housing portions 17 of the center frame 7 with the same direction, and the bottom portion of the secondary battery 2 has a shape dimension corresponding to the bottom shape dimension of the battery can 24. The bottom frame 8 having the accommodating recesses 18 formed in parallel is mounted. On the sealing plate 23 side of the secondary battery 2, as shown in FIG. 5 (b), a sealing portion accommodating recess 19 for accommodating the sealing plate 23 side of the secondary battery 2 is formed inside, and on the bottom surface of the recess, A terminal-side frame 6 on which a positive electrode connection window 25 that penetrates the positive electrode terminal 21 and a negative electrode connection window 26 that looks through a part of the sealing plate 23 is mounted. As shown in FIG. 5 (a), a substrate housing recess 28 for housing the circuit board 3 and 10 secondary batteries 2 are connected in series to the outside of the terminal side frame 6 and each secondary battery 2 is A series connection plate 9 connected to the circuit board 3, a positive electrode connection plate 10, and a connection plate housing recess 27 for housing the negative electrode connection plate 11 are formed. The positive electrode connection window 25 and the negative electrode connection window 26 are opened on the bottom surface of the connection plate housing recess 27.

１０個の二次電池２を端子側フレーム６、センターフレーム７、底側フレーム８で囲って互いに接合した後、図６に示すように、端子側フレーム６に形成された正極接続窓２５と負極接続窓２６から、図７に示す直列接続板９を隣り合う二次電池２にまたがって正極端子２１と封口板２３とに当接させ、正極接続部４１を正極端子２１に、負極接続部４２を封口板２３にそれぞれスポット溶接して１０個の二次電池２を直列接続する。直列接続された正極側の接続端となる二次電池２の正極端子２１には正極接続板１０が、直列接続された負極側の接続端となる二次電池２の封口板２３には負極接続板１１がスポット溶接される。図７は直列接続板９の例を示すものであるが、直列接続板９、正極接続板１０、負極接続板１１には、それぞれ回路基板３に接続するための基板接続突起２９が形成されている。   After ten secondary batteries 2 are surrounded by the terminal side frame 6, the center frame 7, and the bottom frame 8 and joined to each other, as shown in FIG. 6, the positive electrode connection window 25 and the negative electrode formed in the terminal side frame 6 Through the connection window 26, the series connection plate 9 shown in FIG. 7 is brought into contact with the positive electrode terminal 21 and the sealing plate 23 across the adjacent secondary batteries 2, and the positive electrode connection portion 41 is connected to the positive electrode terminal 21 and the negative electrode connection portion 42. Are spot-welded to the sealing plate 23 to connect 10 secondary batteries 2 in series. The positive electrode connection plate 10 is connected to the positive electrode terminal 21 of the secondary battery 2 serving as the connection end on the positive electrode side connected in series, and the negative electrode connection is connected to the sealing plate 23 of the secondary battery 2 serving as the connection end on the negative electrode side connected in series. The plate 11 is spot welded. FIG. 7 shows an example of the series connection plate 9. On the series connection plate 9, the positive electrode connection plate 10, and the negative electrode connection plate 11, board connection protrusions 29 for connecting to the circuit board 3 are formed. Yes.

１０個の二次電池２に直列接続板９、正極接続板１０、負極接続板１１がスポット溶接された端子側フレーム６の基板収容凹部２８に回路基板３を収納すると、直列接続板９、正極接続板１０及び負極接続板１１に形成された基板接続突起２９が回路基板３に形成された接続穴に挿入されるので、各基板接続突起２９は回路基板３に半田付けされる。この接続構造により、１０個の二次電池２それぞれを回路基板３に接続するためにリード配線することなく各二次電池２は回路基板３に接続され、回路基板３において基板接続突起２９の間の電圧から各二次電池２個々の電池電圧を測定することができ、回路基板３に構成された電池保護回路は各二次電池２個々の電池電圧から二次電池２を過充電、過放電から保護する制御を実行し、充放電制御回路は電池電圧及び電池温度の測定に基づく充放電制御を実行する。   When the circuit board 3 is housed in the substrate housing recess 28 of the terminal side frame 6 in which the series connection plate 9, the positive electrode connection plate 10, and the negative electrode connection plate 11 are spot-welded to the ten secondary batteries 2, the series connection plate 9, the positive electrode Since the board connection protrusions 29 formed on the connection board 10 and the negative electrode connection board 11 are inserted into the connection holes formed on the circuit board 3, each board connection protrusion 29 is soldered to the circuit board 3. With this connection structure, each secondary battery 2 is connected to the circuit board 3 without lead wiring to connect each of the ten secondary batteries 2 to the circuit board 3, and between the board connection protrusions 29 in the circuit board 3. The battery voltage of each secondary battery 2 can be measured from the voltage of the battery, and the battery protection circuit configured on the circuit board 3 overcharges and overdischarges the secondary battery 2 from the battery voltage of each secondary battery 2 The charge / discharge control circuit executes charge / discharge control based on the measurement of the battery voltage and the battery temperature.

基板収容凹部２８に収容された回路基板３と、センターフレーム７上に配置されるコネクタケース１２内に設けられる送風ファン４及び接続プラグ１４との間にリード接続がなされた後、回路基板３は樹脂モールドされる。樹脂モールドは、リード線の接続部分を含む電子部品の実装面に溶融した樹脂を流し込んで固化させることにより、回路基板３の電気的絶縁性が強化されると同時に防湿・防水性を図ることができる。より好ましくは、基板収容凹部２８内を埋めるように溶融した樹脂を流し込んで固化させると、回路基板３の全面が樹脂で包み込まれ、回路基板３と端子側フレーム６とが樹脂モールドが施される。この樹脂モールドにより回路基板３上に実装された電子部品の防湿対策が図られる他、パックケース５に形成された通気穴１３ａ，１３ｂなどから浸入した水により電気的障害が発生することを防止することができる。   After the lead connection is made between the circuit board 3 housed in the board housing recess 28 and the blower fan 4 and the connection plug 14 provided in the connector case 12 disposed on the center frame 7, the circuit board 3 is Resin molded. The resin mold allows the molten resin to flow and solidify on the mounting surface of the electronic component including the lead wire connection portion, thereby enhancing the electrical insulation of the circuit board 3 and at the same time providing moisture and water resistance. it can. More preferably, when the molten resin is poured and solidified so as to fill the inside of the substrate housing recess 28, the entire surface of the circuit board 3 is wrapped with the resin, and the circuit board 3 and the terminal side frame 6 are subjected to resin molding. . In addition to taking moisture-proof measures for the electronic components mounted on the circuit board 3 by this resin mold, it is possible to prevent electrical failure from occurring due to water that has entered through the vent holes 13a and 13b formed in the pack case 5. be able to.

上記のように二次電池２及び回路基板３が一体に組み合わされた後、図２に示すように、４面に保護板１６が配置され、センターフレーム７上に配した送風ファン４を囲ってコネクタケース１２を配した後、右ケース５ａ及び左ケース５ｂからなるパックケース５を閉じて、図１に示したような電池パック１に完成される。   After the secondary battery 2 and the circuit board 3 are combined together as described above, as shown in FIG. 2, the protection plates 16 are arranged on the four surfaces and surround the blower fan 4 arranged on the center frame 7. After the connector case 12 is disposed, the pack case 5 including the right case 5a and the left case 5b is closed to complete the battery pack 1 as shown in FIG.

この電池パック１は、図９に示すように、電動工具Ａにスライド装着されると、コネクタケース１２内に設けられた接続プラグ１４が電動工具Ａに設けられた接続ソケットに接続され、電動工具Ａの始動スイッチのＯＮ操作により電動工具Ａに駆動電力を供給する電力供給回路が閉じられる。電動工具Ａの駆動負荷が大きくなると二次電池２からの放電量も増加するため温度上昇し、電池管理回路により所定温度が検出されると、電池管理回路は送風ファン４が駆動されるように制御するので、二次電池２は送風空気により冷却される。リチウムイオン二次電池における放電は発熱反応となるので、大電流放電により電動工具Ａが使用されると二次電池２の温度上昇は激しく、電池管理回路は送風により二次電池２が６０℃以下の温度状態で使用されるように送風ファン４を制御する。特に、真夏の炎天下のような高温環境では使用以前に二次電池２の温度が４０℃を越える場合も想定でき、そのような環境下で電動工具Ａが使用されると温度上昇も大きくなるので、電池管理回路は二次電池２の温度が高いときには電動工具Ａの使用の如何にかかわらず送風ファン４を駆動して二次電池２を冷却し、二次電池２の温度が６０℃を越えるような場合には電動工具Ａに対する電力供給を停止して送風ファン４の駆動により二次電池２の温度が低下するように制御する。   As shown in FIG. 9, when the battery pack 1 is slid onto the electric tool A, the connection plug 14 provided in the connector case 12 is connected to the connection socket provided in the electric tool A, and the electric tool The power supply circuit for supplying drive power to the electric power tool A is closed by turning on the start switch of A. When the driving load of the power tool A increases, the amount of discharge from the secondary battery 2 also increases, so that the temperature rises. When a predetermined temperature is detected by the battery management circuit, the battery management circuit drives the blower fan 4. Since it controls, the secondary battery 2 is cooled by blowing air. Since the discharge in the lithium ion secondary battery becomes an exothermic reaction, when the electric power tool A is used due to the large current discharge, the temperature rise of the secondary battery 2 is severe. The blower fan 4 is controlled so as to be used in the temperature state. In particular, in a high-temperature environment such as under hot summer, it can be assumed that the temperature of the secondary battery 2 exceeds 40 ° C. before use, and when the power tool A is used in such an environment, the temperature rise increases. When the temperature of the secondary battery 2 is high, the battery management circuit drives the blower fan 4 to cool the secondary battery 2 regardless of the use of the power tool A, and the temperature of the secondary battery 2 exceeds 60 ° C. In such a case, the power supply to the electric power tool A is stopped, and the blower fan 4 is driven so that the temperature of the secondary battery 2 is lowered.

送風ファン４は、その回転によりパックケース５内に外気を取り込む吸気ファンとして構成され、吸気した外気を二次電池２に吹き付けて冷却する。電池パック１を電動工具Ａに装着すると、コネクタケース１２は電動工具Ａの電池パック装着面に当接するので、コネクタケース１２の吸気口３２に対向する電動工具Ａの電池パック装着面には開口部が形成され、図９に示すように、電動工具Ａの電池パック１の装着部位の側面には前記開口部に通じる外気取り入れ口ａが形成される。   The blower fan 4 is configured as an intake fan that takes outside air into the pack case 5 by its rotation, and blows the sucked outside air onto the secondary battery 2 to cool it. When the battery pack 1 is attached to the electric tool A, the connector case 12 abuts on the battery pack attachment surface of the electric tool A, so that an opening is formed in the battery pack attachment surface of the electric tool A that faces the air inlet 32 of the connector case 12. As shown in FIG. 9, an outside air intake a leading to the opening is formed on the side surface of the battery pack 1 mounting portion of the electric power tool A.

図８に白抜き矢印で示すように、送風ファン４はパックケース５内のセンターフレーム７上に配設されているので、送風ファン４が駆動されると、吸気口３２から吸気された外気は所定間隔で並列配置された二次電池２の対向間を通過し、パックケース５の下に開口する下方通気穴１３ａから排出される空気流路が形成されるので、電動工具Ａを駆動する大きな放電電流により温度上昇する二次電池２が冷却され、温度上昇が抑制される。また、センターフレーム７上に設けられた整流板１５は、送風ファン４から送風されてきた空気の流れを両側に流して送風ファン４の直下にある二次電池２だけでなく端方向にある二次電池２にも送風空気を送ることができ、全ての二次電池２が均等に冷却されるように作用する。この整流板１５に開口径及び開口位置を調整して開口部を形成することにより、整流板１５の下に位置する二次電池２にも送風空気が当たるように調整することができ、各二次電池２に対する空冷状態を均等化して電池温度が平均化されるように調整することができる。   Since the blower fan 4 is disposed on the center frame 7 in the pack case 5 as indicated by the white arrow in FIG. 8, when the blower fan 4 is driven, the outside air sucked from the intake port 32 is An air flow path that passes between the opposed secondary batteries 2 arranged in parallel at a predetermined interval and is discharged from the lower vent 13a that opens below the pack case 5 is formed. The secondary battery 2 whose temperature rises due to the discharge current is cooled, and the temperature rise is suppressed. In addition, the rectifying plate 15 provided on the center frame 7 allows not only the secondary battery 2 directly below the blower fan 4 to flow on the both sides, but also the two in the end direction. Blowing air can also be sent to the secondary battery 2, so that all the secondary batteries 2 are cooled uniformly. By adjusting the opening diameter and opening position of the rectifying plate 15 to form an opening, it is possible to adjust the secondary battery 2 positioned under the rectifying plate 15 so that the blown air is applied to the rectifying plate 15. It can adjust so that the battery temperature may be equalized by equalizing the air cooling state with respect to the secondary battery 2.

電池パック１は、それが電動工具Ａに装着されたとき、図９に示すように、電動工具Ａの最下部と電池パック１の底面とが同一高さ位置となる寸法に形成することにより、電動工具Ａを床面などに安定して立てることができる。図８に示すように、パックケース５の二次電池２の長手方向断面は、下方の両側に下方窪み３１ａ及び上方の両側に上方窪み３１ｂが形成され、この下方及び上方の各窪み３１ａ，３１ｂにそれぞれ下方通気穴１３ａ、上方通気穴１３ｂが形成されている。この下方及び上方の各窪み３１ａ，３１ｂが形成されていることにより、電動工具Ａを立てた状態、即ち電動工具Ａの駆動が停止されている状態でも下方通気穴１３ａは塞がれることはなく、破線矢印で示すように、下方通気穴１３ａから流入した外気が二次電池２の間を通って上方通気穴１３ｂに抜ける空気の流れが形成される。特に、電動工具Ａを駆動した後では二次電池２の温度が上昇しており、その熱によって上方通気穴１３ｂに流れる上昇気流が発生し、それに伴って下方通気穴１３ａから外気が流入して二次電池２の間を通って上方通気穴１３ｂに流れる空気の流れが形成され、温度上昇した二次電池２は送風ファン４が停止している状態でも冷却作用が促進され、速やかに二次電池２の温度を低下させることができる。   When the battery pack 1 is attached to the electric power tool A, as shown in FIG. 9, the lowermost part of the electric power tool A and the bottom surface of the battery pack 1 are formed to have the same height position. The electric tool A can be stood stably on the floor surface. As shown in FIG. 8, the longitudinal cross section of the secondary battery 2 of the pack case 5 has a lower dent 31a on both lower sides and an upper dent 31b on both upper sides, and the lower and upper dents 31a and 31b. A lower vent hole 13a and an upper vent hole 13b are formed respectively. The lower and upper recesses 31a and 31b are formed, so that the lower vent hole 13a is not blocked even when the electric tool A is upright, that is, when the driving of the electric tool A is stopped. As indicated by broken arrows, an air flow is formed in which the outside air flowing in from the lower vent hole 13a passes between the secondary batteries 2 and passes through the upper vent hole 13b. In particular, after driving the electric power tool A, the temperature of the secondary battery 2 is increased, and an upward airflow that flows into the upper vent hole 13b is generated by the heat, and accordingly, outside air flows in from the lower vent hole 13a. A flow of air that flows between the secondary batteries 2 and flows into the upper vent hole 13b is formed, and the secondary battery 2 that has risen in temperature is accelerated in cooling even when the blower fan 4 is stopped, so that the secondary battery can be quickly recharged. The temperature of the battery 2 can be lowered.

上記下方及び上方の各通気穴１３ａ，１３ｂは二次電池２の冷却に効果的に作用するが、雨中など水滴が飛散するような環境で電動工具Ａが使用された場合や、水溜りのある床面に電動工具Ａが置かれたような場合に、下方及び上方の各通気穴１３ａ，１３ｂから水が浸入する恐れがある。図８に示すように、パックケース５内に水が浸入しても、各二次電池２の封口板側は端子側フレーム６に囲われ、回路基板３は樹脂モールド３０によって被覆されているので、通電部分に水が浸入することはなく、過酷な環境下での使用が想定される電動工具Ａの電池パック１としての安全性が確保される。   The lower and upper vent holes 13a and 13b effectively act to cool the secondary battery 2. However, when the electric tool A is used in an environment where water droplets scatter, such as in the rain, or there is a puddle. When the electric tool A is placed on the floor, water may enter from the lower and upper vent holes 13a and 13b. As shown in FIG. 8, even if water enters the pack case 5, the sealing plate side of each secondary battery 2 is surrounded by the terminal side frame 6, and the circuit board 3 is covered with the resin mold 30. The water does not enter the energized portion, and the safety of the electric power tool A that is assumed to be used in a harsh environment as the battery pack 1 is ensured.

電動工具Ａの駆動により電池容量が低下した場合には、電動工具Ａから電池パック１を取り外し、図１０に示すように、充電器Ｂに装着することにより二次電池２に対する充電がなされる。電池パック１は充電器Ｂに装着するときには、図示するように天地方向を逆にして充電器Ｂに装着され、充電器Ｂの電池パック１の装着位置に設けられた通風口から充電器Ｂ内の空気を吸気し、充電器Ｂの排熱と同時に充電中の二次電池２を冷却する。充電器Ｂの側にも排気ファンが設けられている場合には、送風ファン４と合わせた送風を実施すると、より効果的な冷却がなされる。   When the battery capacity is reduced by driving the electric power tool A, the battery pack 1 is removed from the electric power tool A, and the secondary battery 2 is charged by attaching it to the charger B as shown in FIG. When the battery pack 1 is attached to the charger B, the battery pack 1 is attached to the charger B with the upside-down direction as shown in the figure, and the battery pack 1 is inserted into the charger B from the ventilation opening provided at the battery pack 1 attachment position of the charger B. The secondary battery 2 being charged is cooled simultaneously with the exhaust heat of the charger B. In the case where an exhaust fan is also provided on the side of the charger B, more effective cooling is performed by performing air blowing combined with the air blowing fan 4.

使用直後の電動工具Ａから取り外された電池パック１では、二次電池２の温度が充電に適した温度以上になっていることが予想でき、電池温度は電池管理回路で検出されると共にコネクタを通じて充電器Ｂ側でも検出されるので、電池温度が４５℃以上である場合には充電は開始されず、電池温度が４５℃以下になるように送風による冷却が継続された後に充電が開始されるように制御される。   In the battery pack 1 removed from the power tool A immediately after use, the temperature of the secondary battery 2 can be expected to be higher than the temperature suitable for charging, and the battery temperature is detected by the battery management circuit and through the connector. Since it is also detected on the side of the charger B, charging is not started when the battery temperature is 45 ° C. or higher, and charging is started after cooling by blowing is continued so that the battery temperature becomes 45 ° C. or lower. To be controlled.

以上説明した電池パック１では、二次電池２として扁平角形のものを適用しているが、円筒形に形成した二次電池を適用することも可能であり、本構成により同様の効果が得られる。   In the battery pack 1 described above, a flat rectangular battery is used as the secondary battery 2, but a secondary battery formed in a cylindrical shape can also be applied, and the same effect can be obtained by this configuration. .

本発明に係る電池パックは、複数の二次電池と回路基板とがブロック状に一体化され、一体化する構造において各二次電池と回路基板とが電気的接続されるので、各二次電池と回路基板との間にリード配線する必要がなく、主要構成要素がブロック状に形成されるので、これをパックケース内に収容すると、堅固な構造を簡易に構成することが可能となり、電動工具などの過酷な使用環境に曝される電池パックとして好適なものが得られる。   In the battery pack according to the present invention, a plurality of secondary batteries and a circuit board are integrated in a block shape, and each secondary battery and the circuit board are electrically connected in an integrated structure. There is no need to carry out lead wiring between the circuit board and the circuit board, and the main components are formed in a block shape. If this is housed in the pack case, it is possible to easily construct a solid structure and What is suitable as a battery pack exposed to severe use environments, such as these, is obtained.

実施形態に係る電池パックの外観構成を示す斜視図。The perspective view which shows the external appearance structure of the battery pack which concerns on embodiment. 同上電池パックの構成要素を示す分解斜視図。The disassembled perspective view which shows the component of a battery pack same as the above. 同上電池パックに適用した二次電池の構成を示す斜視図。The perspective view which shows the structure of the secondary battery applied to the battery pack same as the above. 二次電池を保持するセンターフレームの構成を示す斜視図。The perspective view which shows the structure of the center frame holding a secondary battery. 端子側フレームの構成を（ａ）外面側と、（ｂ）内面側とで示す斜視図。The perspective view which shows the structure of a terminal side frame by (a) outer surface side and (b) inner surface side. 複数の二次電池と回路基板の接続構造を示す側面図。The side view which shows the connection structure of a some secondary battery and a circuit board. 直列接続板の構成を示す斜視図。The perspective view which shows the structure of a series connection board. 二次電池に対する空気流通構造を示す断面図。Sectional drawing which shows the air distribution structure with respect to a secondary battery. 電動工具に対する装着構造を説明する側面図。The side view explaining the mounting structure with respect to an electric tool. 充電器に対する装着構造を説明する側面図。The side view explaining the mounting structure with respect to a charger.

符号の説明Explanation of symbols

１ 電池パック
２ 二次電池
３ 回路基板
４ 送風ファン
５ パックケース
６ 端子側フレーム
７ センターフレーム
８ 底側フレーム
９ 直列接続板
１０ 正極接続板
１１ 負極接続板 DESCRIPTION OF SYMBOLS 1 Battery pack 2 Secondary battery 3 Circuit board 4 Blower fan 5 Pack case 6 Terminal side frame 7 Center frame 8 Bottom side frame 9 Series connection board 10 Positive electrode connection board 11 Negative electrode connection board

Claims (2)

電池缶内に極板群及び電解液を収容して開口端を封口板によって封口し、前記封口板に極端子が設けられてなる複数の二次電池と、各二次電池の動作状態を管理する電池管理回路を構成した回路基板とをパックケース内に収容してなる電池パックであって、
前記複数の二次電池をその封口板側を同一方向にしてフレームによって保持し、各二次電池の極端子に接続板を接合して複数の二次電池を直列及び／又は並列接続し、前記接続板に設けられた接続突起が接続穴に挿入されるように前記回路基板を取り付け、接続突起と回路基板とが接合されてなることを特徴とする電池パック。 A plurality of secondary batteries in which the electrode plate group and the electrolyte solution are accommodated in the battery can, the opening end is sealed with a sealing plate, and the electrode terminal is provided on the sealing plate, and the operation state of each secondary battery is managed. A battery pack in which a circuit board constituting a battery management circuit is housed in a pack case,
The plurality of secondary batteries are held by a frame with the sealing plate side in the same direction, a connection plate is joined to the electrode terminal of each secondary battery, and the plurality of secondary batteries are connected in series and / or in parallel. A battery pack, wherein the circuit board is attached so that a connection protrusion provided on the connection plate is inserted into the connection hole, and the connection protrusion and the circuit board are joined. 二次電池は、扁平角形に形成され、その最大面積平坦面が所定間隔を隔てて互いに対面するようにフレームによって保持されてなる請求項１に記載の電池パック。

2. The battery pack according to claim 1, wherein the secondary battery is formed in a flat rectangular shape and is held by a frame such that a flat surface having a maximum area faces each other at a predetermined interval.

JP2004011653A 2004-01-20 2004-01-20 Battery pack Expired - Fee Related JP4593930B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2004011653A JP4593930B2 (en) 2004-01-20 2004-01-20 Battery pack
EP05703777A EP1727223A4 (en) 2004-01-20 2005-01-18 Battery pack
PCT/JP2005/000540 WO2005069408A1 (en) 2004-01-20 2005-01-18 Battery pack
US10/574,349 US7846577B2 (en) 2004-01-20 2005-01-18 Battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004011653A JP4593930B2 (en) 2004-01-20 2004-01-20 Battery pack

Publications (2)

Publication Number Publication Date
JP2005209366A JP2005209366A (en) 2005-08-04
JP4593930B2 true JP4593930B2 (en) 2010-12-08

Family

ID=34898281

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004011653A Expired - Fee Related JP4593930B2 (en) 2004-01-20 2004-01-20 Battery pack

Country Status (1)

Country Link
JP (1) JP4593930B2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6972544B2 (en) * 2003-10-14 2005-12-06 Black & Decker Inc. Apparatus for interconnecting battery cells in a battery pack and method thereof
JP4477048B2 (en) * 2007-08-23 2010-06-09 矢崎総業株式会社 Power supply
JP5284053B2 (en) * 2008-11-17 2013-09-11 株式会社東芝 Secondary battery pack
KR101015834B1 (en) 2009-01-06 2011-02-23 에스비리모티브 주식회사 Battery module
JP5537086B2 (en) * 2009-08-04 2014-07-02 株式会社東芝 Secondary battery pack
JP5537111B2 (en) * 2009-09-30 2014-07-02 株式会社東芝 Secondary battery device
WO2011105095A1 (en) * 2010-02-24 2011-09-01 三洋電機株式会社 Battery module, battery system, electric vehicle, mobile body, power storage device, power supply device, and electric apparatus
JP5606576B2 (en) * 2013-04-10 2014-10-15 株式会社東芝 Secondary battery pack

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000223160A (en) * 1999-01-29 2000-08-11 Sanyo Electric Co Ltd Power supply device
JP2001313015A (en) * 2000-02-25 2001-11-09 Matsushita Electric Ind Co Ltd Battery pack
JP2005056721A (en) * 2003-08-05 2005-03-03 Sanyo Electric Co Ltd Battery pack

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000223160A (en) * 1999-01-29 2000-08-11 Sanyo Electric Co Ltd Power supply device
JP2001313015A (en) * 2000-02-25 2001-11-09 Matsushita Electric Ind Co Ltd Battery pack
JP2005056721A (en) * 2003-08-05 2005-03-03 Sanyo Electric Co Ltd Battery pack

Also Published As

Publication number Publication date
JP2005209366A (en) 2005-08-04

Similar Documents

Publication Publication Date Title
JP4662530B2 (en) Battery pack
US7846577B2 (en) Battery pack
EP3136497B1 (en) Battery module including water cooling structure
JP4635442B2 (en) Battery pack
KR101252944B1 (en) Battery pack with enhanced radiating ability
KR101252963B1 (en) Battery pack with enhanced radiating ability
WO2014010438A1 (en) Battery system, and vehicle and power storage device equipped with battery system
KR101726383B1 (en) Apparatus for testing battery's performance
CN104285315A (en) Battery module including high-efficiency cooling structure
JP2005209369A (en) Battery pack
US20100062322A1 (en) Electricity storage device
KR20190001410A (en) Battery Module
KR20150033856A (en) Battery Module Having Temperature Sensor
CN109845024B (en) Battery system and electric vehicle including the same
JP4593930B2 (en) Battery pack
JP4979216B2 (en) Secondary battery pack case
KR100601502B1 (en) Pack secondary battery
KR101636380B1 (en) Voltage Sensing Assembly and Battery Module Including the Same
JP4752180B2 (en) Battery pack
KR20170134270A (en) Battery pack for electric vehicle with excellent vibration-resistance
KR100709868B1 (en) Pack case for secondary battery
KR20060118113A (en) Secondary battery module
US20240120569A1 (en) Battery pack, battery thermal management system and battery thermal management control method
KR20170103222A (en) Battery module and battery pack including the same
KR100612231B1 (en) Secondary battery module

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20061207

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20090526

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20091026

RD03 Notification of appointment of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7423

Effective date: 20091228

RD05 Notification of revocation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7425

Effective date: 20100120

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100824

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100916

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130924

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees