JP2008132549A - Power tool case - Google Patents

Power tool case Download PDF

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Publication number
JP2008132549A
JP2008132549A JP2006319011A JP2006319011A JP2008132549A JP 2008132549 A JP2008132549 A JP 2008132549A JP 2006319011 A JP2006319011 A JP 2006319011A JP 2006319011 A JP2006319011 A JP 2006319011A JP 2008132549 A JP2008132549 A JP 2008132549A
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secondary battery
power
fuel cell
charging
fan
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JP2006319011A
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JP5027489B2 (en
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Hiroyasu Kitamura
浩康 北村
Hideaki Abe
秀明 安倍
Toshiyuki Kubota
俊幸 久保田
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H3/00—Storage means or arrangements for workshops facilitating access to, or handling of, work tools or instruments
    • B25H3/006—Storage means specially adapted for one specific hand apparatus, e.g. an electric drill

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Workshop Equipment, Work Benches, Supports, Or Storage Means (AREA)
  • Portable Power Tools In General (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power tool case capable of charging a secondary battery while a power tool and the secondary battery are stored and carried in a power tool case. <P>SOLUTION: The power tool case 1 houses a power tool body 2a, and the secondary battery 6 being an operation power source of the power tool body 2a. It is provided with a fuel cell 9. A power generating means is provided for power generation that uses the fuel cell 9. A charging means is provided for charging the secondary battery 6 by electric power of the fuel cell 9 generated by the power generating means. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は電動工具が収納される電動工具ケースに関する。   The present invention relates to a power tool case in which a power tool is stored.

従来、電池パックのような二次電池を動作電源として備えた手持式の電動工具が利用されており、例えば特許文献１には電動工具の二次電池を商用電源を用いて充電する充電器が開示されている。   Conventionally, a hand-held power tool including a secondary battery such as a battery pack as an operating power source has been used. For example, Patent Document 1 discloses a charger that charges a secondary battery of a power tool using a commercial power source. It is disclosed.

ところで上記電動工具は付属の二次電池や充電器と共に電動工具ケースに収納されて作業現場に持ち運ばれる。しかし電動工具ケースに電動工具を収納して持ち運んでいる時には商用電源を利用できないため二次電池を充電できないため、二次電池の充電が不十分である場合には作業現場で充電器を用いて二次電池を充電する必要があり、このように作業現場で二次電池の充電を行った場合にはその間に電動工具を利用できないという問題があった。
特開２００５−７３３５０号公報 By the way, the electric tool is housed in an electric tool case together with an attached secondary battery and a charger and carried to a work site. However, when the power tool is stored and carried in the power tool case, the secondary battery cannot be charged because the commercial power supply cannot be used. The secondary battery needs to be charged, and when the secondary battery is charged at the work site in this way, there is a problem that the electric tool cannot be used during that time.
JP 2005-73350 A

本発明は上記従来の問題点に鑑みて発明したものであって、電動工具ケースに電動工具を収納して持ち運んでいる際に二次電池を充電できる電動工具ケースを提供することを課題とする。   This invention is invented in view of the said conventional problem, Comprising: It aims at providing the electric tool case which can charge a secondary battery, when storing and carrying the electric tool in an electric tool case. .

上記課題を解決するために本発明に係る電動工具ケースは、電動工具本体２ａ及び電動工具本体２ａの動作電源となる二次電池６とが収納される電動工具ケース１において、燃料電池９と、該燃料電池９を利用して発電する発電手段と、該発電手段で発生させた燃料電池９の電力で前記二次電池６を充電する充電手段を備えて成ることを特徴とする。このような構成とすることで、発電手段で燃料電池９を発電すると共に、充電手段により前記発電手段で発生した電力で電動工具ケース１内に収納した二次電池６を充電できる。   In order to solve the above problems, an electric tool case according to the present invention includes an electric tool case 1 in which an electric tool main body 2a and a secondary battery 6 serving as an operation power source of the electric tool main body 2a are housed. It is characterized by comprising a power generation means for generating electricity using the fuel cell 9 and a charging means for charging the secondary battery 6 with the electric power of the fuel cell 9 generated by the power generation means. With this configuration, the fuel cell 9 is generated by the power generation means, and the secondary battery 6 housed in the electric tool case 1 can be charged by the power generated by the power generation means by the charging means.

また請求項２は請求項１において、前記充電手段により二次電池６が満充電状態となった時に該二次電池６の充電を自動的に停止する制御手段を設けて成ることを特徴とする。このような構成により、二次電池６が満充電状態となった時に二次電池６の充電を自動的に停止して二次電池６の過充電を防止できる。   Further, a second aspect of the present invention is characterized in that, in the first aspect, a control means is provided for automatically stopping the charging of the secondary battery 6 when the secondary battery 6 is fully charged by the charging means. . With such a configuration, when the secondary battery 6 is fully charged, charging of the secondary battery 6 is automatically stopped to prevent overcharge of the secondary battery 6.

また請求項３は請求項２において、前記二次電池６を冷却するためのファン１６を備え、該ファン１６を二次電池６の充電時及び充電完了後に自動的に駆動する制御手段を設けて成ることを特徴とする。二次電池６の充電時は勿論、充電完了後にもファン１６により二次電池６を冷却できる。   A third aspect of the present invention includes a fan 16 for cooling the secondary battery 6 according to the second aspect, and further includes a control unit that automatically drives the fan 16 when the secondary battery 6 is charged and after the charging is completed. It is characterized by comprising. The secondary battery 6 can be cooled by the fan 16 not only when the secondary battery 6 is charged but also after the charging is completed.

また請求項４は請求項１乃至３のいずれか１項において、前記発電手段として燃料電池９を発電するために必要な電気機器を備え、燃料電池９の発電開始時における前記電気機器の動作電源を前記二次電池６とすることを特徴とする。燃料電池９の発電開始時における電気機器の動作電源を二次電池６とすることで、電気機器を起動するために別途キャパシタや二次電池６等の電力貯蔵装置を設けることなく、電気機器による燃料電池９の発電を開始できる。   Further, a fourth aspect of the present invention provides the power source for operation of the electric device according to any one of the first to third aspects, comprising: an electric device necessary for generating the fuel cell 9 as the power generation means; Is the secondary battery 6. By using the secondary battery 6 as the operation power source of the electric device at the start of power generation of the fuel cell 9, it is possible to use the electric device without providing a power storage device such as a capacitor or the secondary battery 6 in order to start the electric device. The power generation of the fuel cell 9 can be started.

請求項１に係る発明では、電動工具ケースに電動工具及び二次電池を収納して持ち運んでいる時に燃料電池を利用して二次電池を充電でき、作業現場で二次電池を充電するなどの必要がない。   In the invention according to claim 1, the secondary battery can be charged using the fuel cell when the electric tool and the secondary battery are stored and carried in the electric tool case, and the secondary battery is charged at the work site. There is no need.

また請求項２に係る発明では、請求項１に係る発明の効果に加えて、二次電池が満充電状態となった時に充電を自動的に停止して二次電池の過充電を防止できる。   In addition, in the invention according to claim 2, in addition to the effect of the invention according to claim 1, when the secondary battery is in a fully charged state, the charging is automatically stopped to prevent overcharge of the secondary battery.

また請求項３に係る発明では、請求項１又は請求項２に係る発明の効果に加えて、ファンを運転して二次電池を確実に冷却でき、二次電池で火傷することを防止でき、また二次電池の電池寿命を延ばすことができる。   In addition, in the invention according to claim 3, in addition to the effect of the invention according to claim 1 or claim 2, the secondary battery can be reliably cooled by operating the fan, and the secondary battery can be prevented from being burned. In addition, the battery life of the secondary battery can be extended.

また請求項４に係る発明では、請求項１乃至請求項３のいずれか一項に係る発明の効果に加えて、気機器を起動するために別途キャパシタや二次電池等の電力貯蔵装置を設けることなく電気機器による燃料電池の発電を開始でき、コストを削減できる。   In addition, in the invention according to claim 4, in addition to the effect of the invention according to any one of claims 1 to 3, a power storage device such as a capacitor or a secondary battery is separately provided to start the air device. The power generation of the fuel cell by the electric device can be started without reducing the cost.

以下、本発明を添付図面に示す実施形態に基づいて説明する。図１及び図２に示す本例の電動工具ケース１は、電動工具本体２ａ及び電池パック２ｂを備えた電動工具２と、該電動工具２の商用電源用の充電器３とを出し入れ自在に収納するものであり、収納される電動工具２と前記充電器３からなる付属品とで電動工具セットを構成する。   Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. The electric tool case 1 of this example shown in FIG.1 and FIG.2 accommodates the electric tool 2 provided with the electric tool main body 2a and the battery pack 2b, and the charger 3 for commercial power supplies of this electric tool 2 freely. A power tool set is configured by the power tool 2 to be housed and the accessory including the charger 3.

電動工具２はインパクトドライバとして利用される手持式のインパクト回転工具であり、電動工具２の主体を構成する電動工具本体２ａは、先端に出力部（図示せず）を設けた筒状の本体部４と、本体部４の出力部と反対側から突設したグリップ部５とで構成してある。出力部は電動工具本体２ａに内装した駆動用モータ（図示せず）を駆動源として回転駆動するものであり、駆動用モータを駆動して出力部に着脱自在に取付けたドライバービットなどの工具を回転し、この工具でねじ類を締め付けたり緩めたりできる。   The electric power tool 2 is a hand-held impact rotary tool used as an impact driver, and the electric power tool main body 2a constituting the main body of the electric power tool 2 has a cylindrical main body provided with an output portion (not shown) at the tip. 4 and a grip portion 5 protruding from the opposite side of the output portion of the main body portion 4. The output unit is driven to rotate by using a drive motor (not shown) built in the electric tool body 2a as a drive source, and a tool such as a driver bit which is detachably attached to the output unit by driving the drive motor. Rotate and tighten or loosen screws with this tool.

電池パック２ｂは充放電可能なリチウムイオン電池からなる二次電池６を備え、電動工具２のグリップ部５の突端部に着脱自在に取付けられて駆動用モータの動作電源となる。   The battery pack 2b includes a secondary battery 6 made of a chargeable / dischargeable lithium ion battery, and is detachably attached to the protruding end portion of the grip portion 5 of the electric power tool 2 to serve as an operating power source for the driving motor.

充電器３には電池パック２ｂを着脱自在に取付けられるようにしてあり、充電器３に電池パック２ｂを取付けた状態で該充電器３を商用電源に接続することで、商用電源の電力で電池パック２ｂ内の二次電池６を充電できるようになっている。   The battery pack 2b can be detachably attached to the charger 3. By connecting the charger 3 to a commercial power source with the battery pack 2b attached to the charger 3, the battery can be connected with the power of the commercial power source. The secondary battery 6 in the pack 2b can be charged.

上記電動工具本体２ａ、電池パック２ｂ、充電器３を収納する電動工具ケース１は一面が開口した長方形箱状のケース本体７で主体を構成してあり、ケース本体７の底部を下にした状態で上方に位置する開口部は図示しない開閉自在な蓋によって閉塞される。ケース本体７の長辺側の外側面には把手８を設けてあり、把手８を把持して電動工具ケース１の持ち運びができるようになっている。   The power tool case 1 that houses the power tool main body 2a, the battery pack 2b, and the charger 3 is mainly composed of a rectangular box-shaped case main body 7 that is open on one side, and the bottom portion of the case main body 7 is turned down. The opening located above is closed by an openable / closable lid (not shown). A handle 8 is provided on the outer side of the long side of the case body 7 so that the power tool case 1 can be carried by gripping the handle 8.

電動工具本体２ａ、電池パック２ｂ、充電器３の夫々はケース本体７内の所定位置に配置して収納されるものであり、このうち電池パック２ｂ及び充電器３は長方形状のケース本体７において後述のファン１６が設けられる一短辺側に収納される。これら電動工具本体２ａ、二次電池６、充電器３の夫々をケース本体７に収納した状態において所定位置に固定する手段としては、例えば各機器を嵌め込んで収納するための電動工具ケース１内に形成した凹所や、各機器を係止する係止手段などが挙げられる。   Each of the electric power tool main body 2a, the battery pack 2b, and the charger 3 is disposed and stored at a predetermined position in the case main body 7. Among these, the battery pack 2b and the charger 3 are in the rectangular case main body 7. It is housed on one short side where a fan 16 described later is provided. As a means for fixing each of the electric tool main body 2a, the secondary battery 6 and the charger 3 to a predetermined position in a state where the electric power tool main body 2a, the secondary battery 6 and the charger 3 are stored in the case main body 7, for example, in the electric tool case 1 And the like, and a locking means for locking each device.

上記電動工具ケース１内には、既述の充電器３とは別に、燃料電池９と、該燃料電池９を利用して発電する発電手段と、該発電手段で発生させた燃料電池９の電力で電池パック２ｂの二次電池６を充電する充電手段とを設けている。   In the electric tool case 1, in addition to the charger 3 described above, a fuel cell 9, power generation means for generating power using the fuel cell 9, and power of the fuel cell 9 generated by the power generation means And charging means for charging the secondary battery 6 of the battery pack 2b.

燃料電池９はケース本体７の底部上に設けてあり、該燃料電池９はケース本体７の底部の略全面に亘っている。燃料電池９は水素と空気中に含まれる酸素とをもとに発電が行われるものであり、アノード１０、電解膜１１、カソード１２を順に積層してなるセル１３をセパレータ１４を介して多数積層し、これらセル１３を直列で接続して構成したセルスタックからなる。各セル１３におけるアノード１０及びカソード１２は気体を通す構造をしており、水素をアノード１０に供給すると共に酸素を含む空気をカソード１２に供給することで、アノード１０側の水素は水素イオンとなって電解膜１１を通過してカソード１２に至り、カソード１２側の酸素と反応して水となる。この時、アノード１０側では水素から電子が切り離される反応が起こり、またカソード１２側では電子を利用して水が生成される反応が起こり、これにより燃料電池９には直流の電気が発生する。なお燃料電池９の発電時に生じた水は別途電動工具ケース１に設けたタンクで回収する、又は電動工具２に設けた布に染み込ませて乾燥させるものとする。   The fuel cell 9 is provided on the bottom of the case body 7, and the fuel cell 9 extends over substantially the entire bottom of the case body 7. The fuel cell 9 generates power based on hydrogen and oxygen contained in the air, and a large number of cells 13 in which an anode 10, an electrolytic membrane 11, and a cathode 12 are sequentially stacked are stacked via a separator 14. The cell stack is composed of these cells 13 connected in series. The anode 10 and the cathode 12 in each cell 13 have a structure that allows gas to pass through. Hydrogen is supplied to the anode 10 and air containing oxygen is supplied to the cathode 12, whereby hydrogen on the anode 10 side becomes hydrogen ions. Then, it passes through the electrolytic membrane 11 to reach the cathode 12 and reacts with oxygen on the cathode 12 side to become water. At this time, a reaction in which electrons are separated from hydrogen occurs on the anode 10 side, and a reaction occurs in which water is generated using electrons on the cathode 12 side. As a result, direct current electricity is generated in the fuel cell 9. The water generated during the power generation of the fuel cell 9 is collected in a separate tank provided in the electric tool case 1 or is soaked in a cloth provided in the electric tool 2 and dried.

ケース本体７には燃料電池９のアノード１０に供給される水素を貯留する燃料タンク１５を設けてあり、該燃料タンク１５内の水素は図示しない水素供給路を介して燃料電池９のアノード１０に供給される。該燃料タンク１５内の水素を燃料電池９のアノード１０に供給する水素供給手段としては、例えば水素供給路に設けた開閉自在な電磁弁等の弁を開くことで燃料タンク１５の内圧によりアノード１０に水素を供給するものや、水素供給路に設けたポンプを駆動することでアノード１０に水素を供給するものなどが挙げられ、該水素供給手段は後述の制御回路部２５で制御され、これにより燃料タンク１５内の水素を燃料電池９のアノード１０に供給するか否かを切替えられるようになっている。   The case body 7 is provided with a fuel tank 15 for storing hydrogen supplied to the anode 10 of the fuel cell 9, and the hydrogen in the fuel tank 15 is supplied to the anode 10 of the fuel cell 9 via a hydrogen supply path (not shown). Supplied. As a hydrogen supply means for supplying the hydrogen in the fuel tank 15 to the anode 10 of the fuel cell 9, for example, by opening a valve such as an openable / closable solenoid valve provided in the hydrogen supply path, the anode 10 is controlled by the internal pressure of the fuel tank 15. To supply hydrogen to the anode 10 or to supply hydrogen to the anode 10 by driving a pump provided in the hydrogen supply path, and the hydrogen supply means is controlled by a control circuit unit 25 described later, thereby Whether or not hydrogen in the fuel tank 15 is supplied to the anode 10 of the fuel cell 9 can be switched.

ケース本体７内の燃料タンク１５と反対側の端部にはファン１６を設けてあり、燃料電池９に対向するケース本体７の底部には多数の空気取り込み口１７を形成し、ファン１６に対向するケース本体７の側面部には空気排出口（図示せず）を形成している。ファン１６を運転すると、空気取り込み口１７から電動工具ケース１内に酸素を含む空気を取り込み、この空気が燃料電池９を通過して空気排出口から排出される。ここでファン１６の運転は制御回路部２５により制御されて燃料電池９のカソード１２に酸素を含む空気を供給する酸素供給手段を構成するものであり、このファン１６と、燃料タンク１５、水素供給手段、制御回路部２５で発電手段を構成している。また上記のようにファン１６を運転した場合、燃料電池９を通過した空気は電動工具ケース１内を通って二次電池６近傍を通過し、この後、空気排出口から排出されるようになっており、即ちファン１６は二次電池６や電動工具ケース１を冷却するための冷却手段を兼用している。またケース本体７の底面部の四隅には複数の脚部２０を突設してあり、各脚部２０を床などの載置面に載置した状態で空気取り込み口１７と載置面との間に隙間が形成されるようにしてある。従って電動工具ケース１の各脚部２０を載置面に載置した状態では前記隙間を利用して空気取り込み口１７から電動工具ケース１内に確実に空気を取り込めるようになっている。   A fan 16 is provided at the end of the case body 7 opposite to the fuel tank 15, and a number of air intake ports 17 are formed at the bottom of the case body 7 facing the fuel cell 9. An air discharge port (not shown) is formed in the side surface of the case body 7 to be performed. When the fan 16 is operated, oxygen-containing air is taken into the electric tool case 1 from the air intake port 17, and this air passes through the fuel cell 9 and is discharged from the air discharge port. Here, the operation of the fan 16 is controlled by the control circuit unit 25 to constitute an oxygen supply means for supplying air containing oxygen to the cathode 12 of the fuel cell 9, and this fan 16, the fuel tank 15, and the hydrogen supply The means and the control circuit unit 25 constitute power generation means. When the fan 16 is operated as described above, the air that has passed through the fuel cell 9 passes through the power tool case 1 and the vicinity of the secondary battery 6 and is then discharged from the air discharge port. In other words, the fan 16 also serves as a cooling means for cooling the secondary battery 6 and the electric tool case 1. In addition, a plurality of leg portions 20 project from the four corners of the bottom surface portion of the case body 7, and the air intake port 17 and the placement surface are placed with each leg portion 20 placed on a placement surface such as a floor. A gap is formed between them. Therefore, in a state where each leg portion 20 of the electric tool case 1 is placed on the placement surface, air can be surely taken into the electric tool case 1 from the air intake port 17 using the gap.

電動工具ケース１のケース本体７の内部には充電手段として燃料電池９に接続された回路装置２１を設けてあり、該回路装置２１の回路構成図を図３に示す。なお図３では二次電池６を接続可能な充電端子間に二次電池６を接続した状態を示すものであり、充電端子を二次電池６に替えて図示してあり、また水素供給手段の図示を省略している。   A circuit device 21 connected to the fuel cell 9 as a charging means is provided inside the case main body 7 of the electric tool case 1, and a circuit configuration diagram of the circuit device 21 is shown in FIG. FIG. 3 shows a state in which the secondary battery 6 is connected between charging terminals to which the secondary battery 6 can be connected. The charging terminal is shown in place of the secondary battery 6, and the hydrogen supply means The illustration is omitted.

回路装置２１は、燃料電池９の正極及び負極間に順に直列で接続したインダクタ２２、ダイオード２３、充電端子を備えると共に、ダイオード２３及び充電端子（二次電池６）と並列に接続したスイッチング素子２４と、該スイッチング素子２４に接続されて出力電圧及び出力電流を監視しながらスイッチング素子２４をＰＷＭ制御するマイコン２６を備えた制御回路部２５とを備えており、インダクタ２２、ダイオード２３、スイッチング素子２４、制御回路部２５とで昇圧回路部１８を構成している。   The circuit device 21 includes an inductor 22, a diode 23, and a charging terminal connected in series between the positive electrode and the negative electrode of the fuel cell 9, and a switching element 24 connected in parallel with the diode 23 and the charging terminal (secondary battery 6). And a control circuit unit 25 including a microcomputer 26 that is connected to the switching element 24 and performs PWM control of the switching element 24 while monitoring the output voltage and output current, and includes an inductor 22, a diode 23, and a switching element 24. The booster circuit unit 18 is constituted by the control circuit unit 25.

回路装置２１における昇圧回路部１８の出力側には、充電端子（二次電池６）と並列にファン１６及びファン１６に直列で接続したファン用スイッチング素子２７を接続してあり、スイッチング素子２７に接続したマイコン２６からの信号によりスイッチング素子２７のＯＮ／ＯＦＦを切替えてファン１６のＯＮ／ＯＦＦを切替えられるようにしている。   A fan switching element 27 connected in series to the fan 16 and the fan 16 is connected in parallel with the charging terminal (secondary battery 6) to the output side of the booster circuit unit 18 in the circuit device 21. The switching element 27 is turned on / off by a signal from the connected microcomputer 26 so that the fan 16 can be turned on / off.

ケース本体７の所定位置に電池パック２ｂを収納した場合、該電池パック２ｂの二次電池６は充電端子に電気的に接続されるようになっている。二次電池６を充電端子に接続した状態では、マイコン２６を備えた制御回路部２５、ファン１６、水素供給手段などの燃料電池９を発電するために必要な電気機器の電源は二次電池６及び燃料電池９によって構成され、これにより燃料電池９の発電開始時及び発電開始直後には制御回路部２５、ファン１６、水素供給手段の電源として二次電池６を利用できるようになっている。   When the battery pack 2b is stored in a predetermined position of the case body 7, the secondary battery 6 of the battery pack 2b is electrically connected to the charging terminal. In a state in which the secondary battery 6 is connected to the charging terminal, the power source of the electrical equipment necessary for generating the fuel cell 9 such as the control circuit unit 25 having the microcomputer 26, the fan 16, and the hydrogen supply means is the secondary battery 6 Thus, the secondary battery 6 can be used as a power source for the control circuit unit 25, the fan 16, and the hydrogen supply means at the start of power generation of the fuel cell 9 and immediately after the start of power generation.

このように充電端子に二次電池６を接続した時には、制御回路部２５のマイコン２６は、二次電池６の電力によりファン１６の運転を開始して燃料電池９のカソード１２に酸素を含む空気を送ると共に、同じく二次電池６の電力により水素供給手段を制御して燃料タンク１５内の水素を燃料電池９のアノード１０に供給し、これにより燃料電池９の発電を開始し、またこれと同時にスイッチング素子２４を制御して二次電池６の充電を開始する。マイコン２６は二次電池６の充電時において二次電池６の電圧値及び電流値を監視しながら定電流定電圧方式で二次電池６を充電するものであり、即ち図４に示すように二次電池６の充電は最初に定電流充電を行い、二次電池６の電池電圧が規定値に達すると定電圧充電に移行し、この後、二次電池６に流れる電流値が徐々に低下して規定値となるとスイッチング素子２４をＯＦＦにして充電を完了し、これにより二次電池６が満充電状態となった時に充電を自動的に停止するようにしている。なおマイコン２６は二次電池６の電池電圧が高くなった時もスイッチング素子２４をＯＦＦにして充電を停止するように設定してある。   Thus, when the secondary battery 6 is connected to the charging terminal, the microcomputer 26 of the control circuit unit 25 starts the operation of the fan 16 by the power of the secondary battery 6 and air containing oxygen at the cathode 12 of the fuel cell 9. Similarly, the hydrogen supply means is controlled by the electric power of the secondary battery 6 to supply the hydrogen in the fuel tank 15 to the anode 10 of the fuel cell 9, thereby starting the power generation of the fuel cell 9, and At the same time, the switching element 24 is controlled to start charging the secondary battery 6. The microcomputer 26 charges the secondary battery 6 by a constant current constant voltage method while monitoring the voltage value and current value of the secondary battery 6 when the secondary battery 6 is charged, that is, as shown in FIG. The secondary battery 6 is charged at a constant current first, and when the battery voltage of the secondary battery 6 reaches a specified value, it shifts to a constant voltage charge. Thereafter, the current value flowing through the secondary battery 6 gradually decreases. When the specified value is reached, the switching element 24 is turned off to complete the charging, whereby the charging is automatically stopped when the secondary battery 6 is fully charged. The microcomputer 26 is set so that the charging is stopped by turning off the switching element 24 even when the battery voltage of the secondary battery 6 becomes high.

また図４に示すようにマイコン２６は二次電池６の充電が完了した時から所定時間ｔ経過した後にスイッチング素子２７をＯＦＦにしてファン１６を停止するように設定してある。即ちファン１６は二次電池６の充電開始時点から二次電池６の充電完了後の所定時間ｔが経過する時点まで継続して行われる。   Further, as shown in FIG. 4, the microcomputer 26 is set to turn off the switching element 27 and stop the fan 16 after a predetermined time t has elapsed since the charging of the secondary battery 6 was completed. That is, the fan 16 is continuously performed from the charging start time of the secondary battery 6 to the time when a predetermined time t after the charging of the secondary battery 6 elapses.

上記電動工具ケース１に設けた充電手段で電動工具２の二次電池６を充電するには、電動工具本体２ａから取り外した二次電池６を電動工具ケース１内の所定位置に収納し、二次電池６の端子を充電端子に接続する。二次電池６を充電端子に接続すると、充電端子に接続した二次電池６を動作電源としてマイコン２６が作動すると共に該マイコン２６の指令によりファン１６や水素供給手段が作動し、燃料電池９の発電が開始され、またこれと同時に二次電池６の充電を開始する。そして二次電池６の充電が完了する時点までファン１６及びポンプが継続して運転され、該充電が完了した時点でポンプが停止し、この所定時間ｔ後にファン１６が停止する。   In order to charge the secondary battery 6 of the electric tool 2 by the charging means provided in the electric tool case 1, the secondary battery 6 removed from the electric tool body 2a is stored in a predetermined position in the electric tool case 1, The terminal of the secondary battery 6 is connected to the charging terminal. When the secondary battery 6 is connected to the charging terminal, the microcomputer 26 is operated using the secondary battery 6 connected to the charging terminal as an operating power source, and the fan 16 and the hydrogen supply means are operated according to instructions from the microcomputer 26, so that the fuel cell 9 Power generation is started, and at the same time, charging of the secondary battery 6 is started. The fan 16 and the pump are continuously operated until the charging of the secondary battery 6 is completed, the pump is stopped when the charging is completed, and the fan 16 is stopped after the predetermined time t.

以上説明したように本発明の電動工具ケース１は、発電手段で燃料電池９を発電すると共に充電手段により発電手段で発生した電力で電動工具ケース１内に収納した二次電池６を充電できるので、電動工具ケース１に電動工具２及び二次電池６を収納して持ち運んでいる時に燃料電池９を利用して二次電池６を充電でき、電動工具２を電動工具ケース１で持ち運んだ後に作業現場などで二次電池６を充電する必要がない。   As described above, the power tool case 1 of the present invention can generate the fuel cell 9 by the power generation means and can charge the secondary battery 6 accommodated in the power tool case 1 by the power generated by the power generation means by the charging means. The secondary battery 6 can be charged using the fuel cell 9 when the electric tool 2 and the secondary battery 6 are stored and carried in the electric tool case 1, and the work is performed after the electric tool 2 is carried in the electric tool case 1. There is no need to charge the secondary battery 6 on site.

また本例では充電手段により二次電池６が満充電状態となった時に該二次電池６の充電を自動的に停止する制御手段（マイコン）を設けているので、二次電池６の過充電を防止できる。また二次電池６を冷却するためのファン１６を二次電池６の充電時及び充電完了後に自動的に駆動する制御手段（マイコン２６）を設けているので、ファン１６により充電時及び充電完了直後の二次電池６を確実に冷却できる。従って二次電池６で火傷することを防止でき、また二次電池６の電池寿命を延ばすことができる。   Further, in this example, since there is provided a control means (microcomputer) for automatically stopping the charging of the secondary battery 6 when the secondary battery 6 is fully charged by the charging means, the overcharging of the secondary battery 6 is performed. Can be prevented. Further, since the fan 16 for cooling the secondary battery 6 is automatically controlled when the secondary battery 6 is charged and after the charging is completed (microcomputer 26), the fan 16 is charged by the fan 16 and immediately after the charging is completed. The secondary battery 6 can be reliably cooled. Therefore, it is possible to prevent the secondary battery 6 from being burned and to extend the battery life of the secondary battery 6.

また発電手段を構成する制御回路部２５、ファン１６、水素供給手段からなる各電気機器は、燃料電池９の発電開始時における動作電源を二次電池６とするものであるので、各電気機器を起動するために別途キャパシタや二次電池６等の電力貯蔵装置を設けることなく、電気機器による燃料電池９の発電を開始でき、コストを削減できる。   In addition, each electric device including the control circuit unit 25, the fan 16, and the hydrogen supply unit that constitutes the power generation means uses the secondary battery 6 as an operating power source when the fuel cell 9 starts generating power. Without separately providing a power storage device such as a capacitor and a secondary battery 6 for starting, power generation of the fuel cell 9 by an electric device can be started, and the cost can be reduced.

なお本例の燃料電池９は燃料として水素を用いるものであるが、燃料としてメタノールやエタノールなどのアルコール燃料を用いても良いものとする。   In addition, although the fuel cell 9 of this example uses hydrogen as a fuel, it is also possible to use an alcohol fuel such as methanol or ethanol as the fuel.

本発明の実施の形態の一例を示す電動工具ケースの蓋を開いた状態を示す平面図である。It is a top view which shows the state which opened the lid | cover of the electric tool case which shows an example of embodiment of this invention. 同上の電動工具ケースの側面図である。It is a side view of an electric tool case same as the above. 同上の回路装置の回路構成図である。It is a circuit block diagram of a circuit apparatus same as the above. （ａ）は充電中及び充電完了後におけるファンの運転状態を示すグラフであり、（ｂ）は充電中及び充電完了後において二次電池に流れる充電電流を示すグラフである。(A) is a graph which shows the driving | running state of the fan during charge and after completion of charge, (b) is a graph which shows the charge current which flows into a secondary battery during charge and after completion of charge.

符号の説明Explanation of symbols

１ 電動工具ケース
２ 電動工具
２ａ 電動工具本体
６ 二次電池
９ 燃料電池
１６ ファン DESCRIPTION OF SYMBOLS 1 Electric tool case 2 Electric tool 2a Electric tool main body 6 Secondary battery 9 Fuel cell 16 Fan

Claims (4)

電動工具本体及び電動工具本体の動作電源となる二次電池とが収納される電動工具ケースにおいて、燃料電池と、該燃料電池を利用して発電する発電手段と、該発電手段で発生させた燃料電池の電力で前記二次電池を充電する充電手段を備えて成ることを特徴とする電動工具ケース。   In a power tool case in which a power tool main body and a secondary battery serving as an operation power source for the power tool main body are housed, a fuel cell, power generation means for generating power using the fuel cell, and fuel generated by the power generation means A power tool case comprising charging means for charging the secondary battery with battery power. 前記充電手段により二次電池が満充電状態となった時に該二次電池の充電を自動的に停止する制御手段を設けて成ることを特徴とする請求項１に記載の電動工具ケース。   2. The electric tool case according to claim 1, further comprising control means for automatically stopping the charging of the secondary battery when the secondary battery is fully charged by the charging means. 前記二次電池を冷却するためのファンを備え、該ファンを二次電池の充電時及び充電完了後に自動的に駆動する制御手段を設けて成ることを特徴とする請求項２に記載の電動工具ケース。   3. The electric tool according to claim 2, further comprising a control unit that includes a fan for cooling the secondary battery and that automatically drives the fan when the secondary battery is charged and after the charging is completed. Case. 前記発電手段として燃料電池を発電するために必要な電気機器を備え、燃料電池の発電開始時における前記電気機器の動作電源を前記二次電池とすることを特徴とする請求項１乃至３のいずれか１項に記載の電動工具ケース。   4. An electric device necessary for generating a fuel cell as the power generation means is provided, and an operation power source of the electric device at the start of power generation of the fuel cell is the secondary battery. The electric tool case according to claim 1.
JP2006319011A 2006-11-27 2006-11-27 Power tool case Expired - Fee Related JP5027489B2 (en)

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