JP6252771B2 - Battery pack and power tool - Google Patents
Battery pack and power tool Download PDFInfo
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- JP6252771B2 JP6252771B2 JP2014067168A JP2014067168A JP6252771B2 JP 6252771 B2 JP6252771 B2 JP 6252771B2 JP 2014067168 A JP2014067168 A JP 2014067168A JP 2014067168 A JP2014067168 A JP 2014067168A JP 6252771 B2 JP6252771 B2 JP 6252771B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/247—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/271—Lids or covers for the racks or secondary casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
- H01M50/293—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/298—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the wiring of battery packs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Computer Hardware Design (AREA)
- Mechanical Engineering (AREA)
- Battery Mounting, Suspending (AREA)
- Connection Of Batteries Or Terminals (AREA)
Description
本発明は、電動工具等の対象機器に装着する電池パック、及び電池パックを装着する電動工具に関する。 The present invention relates to a battery pack to be mounted on a target device such as a power tool, and a power tool to mount the battery pack.
近年、各種の電気機器を駆動する電池パックとして、高容量化及び軽量化が可能なリチウムイオン二次電池が広く使用されている。電池パックは、電源供給用のプラス端子とマイナス端子の他に、電圧異常や過電流、温度異常等の異常を報知するための端子を有し、これらの外部接続端子によって装着先の対象機器と電気的に接続される。通常、外部接続端子は電池パック内の回路基板上に設けられ、回路基板は電池パック内でネジ止め等により固定される。 In recent years, lithium ion secondary batteries that can be increased in capacity and weight have been widely used as battery packs for driving various electrical devices. In addition to the positive and negative terminals for power supply, the battery pack has terminals for reporting abnormalities such as voltage abnormalities, overcurrents, and temperature abnormalities. Electrically connected. Usually, the external connection terminals are provided on a circuit board in the battery pack, and the circuit board is fixed in the battery pack by screws or the like.
下記特許文献１は、電池パックにおいて、保護回路の回路基板を電池セル組に対し移動可能に設置し、電池パックを対象機器に接続していない状態では電池セル組と回路基板とが電気的に接続されないようにすることで、対象機器に接続していないときの電池パックの放電を抑制している。なお、特許文献１の電池パックでは、対象機器に装着した状態では回路基板は固定状態になる。 In the following Patent Document 1, in a battery pack, the circuit board of the protection circuit is movably installed with respect to the battery cell set, and the battery cell set and the circuit board are electrically connected in a state where the battery pack is not connected to the target device. By preventing connection, discharging of the battery pack when not connected to the target device is suppressed. In the battery pack of Patent Document 1, the circuit board is in a fixed state when it is mounted on the target device.
電池パックは対象機器にラッチ機構等により簡易に着脱自在であるが、それゆえ装着状態において電池パックと対象機器との間に若干のがたつきが生じることは避けられない。このため、対象機器に振動が加わると、電池パックと対象機器が相互に振動し、両者を電気的に接続する端子に機械的負担が加わる。特に対象機器が電動工具である場合、作業時に加わる振動が大きく、端子に加わる機械的負担も大きくなる。 The battery pack can be easily attached to and detached from the target device by a latch mechanism or the like. Therefore, it is inevitable that a slight rattling occurs between the battery pack and the target device in the mounted state. For this reason, when vibration is applied to the target device, the battery pack and the target device vibrate each other, and a mechanical load is applied to the terminals that electrically connect the two. In particular, when the target device is an electric tool, the vibration applied during work is large, and the mechanical burden applied to the terminal is also large.
本発明はこうした状況を認識してなされたものであり、その目的は、端子に加わる機械的負担を軽減することの可能な電池パック及びそれを装着した電動工具を提供することにある。 The present invention has been made in view of such a situation, and an object of the present invention is to provide a battery pack capable of reducing a mechanical burden applied to a terminal and an electric tool equipped with the battery pack.
本発明のある態様は、電池パックである。この電池パックは、
電池ケースと、
前記電池ケース内に収納された少なくとも１つの電池セルと、
前記電池セル上に設けられた回路基板と、
前記回路基板上に設けられた、対象機器との電気的接続用の端子と、を備える電池パックであって、
前記対象機器に装着された状態において、前記回路基板が前記電池セルに対して可動する。
本発明のもう１つの態様は、電池パックである。この電池パックは、
電池ケースと、
前記電池ケース内に収納された少なくとも１つの電池セルと、
前記電池セル上に設けられた回路基板と、
前記回路基板上に設けられた、対象機器との電気的接続用の端子と、を備える電池パックであって、
前記対象機器への装着状態にかかわらず前記回路基板が前記電池セルに対して可動する。
本発明のもう１つの態様は、電池パックである。この電池パックは、
電池ケースと、
前記電池ケース内に収納された少なくとも１つの電池セルと、
前記電池セル上に設けられた回路基板と、
前記回路基板上に設けられた、対象機器との電気的接続用の端子と、を備える電池パックであって、
前記回路基板が前記電池セルに対して可動し、
前記対象機器への装着によって前記回路基板を前記電池セルに対して固定する部材を有さない。
One embodiment of the present invention is a battery pack. This battery pack
A battery case,
At least one battery cell housed in the battery case;
A circuit board provided on the battery cell;
A battery pack provided on the circuit board, and a terminal for electrical connection with a target device,
In a state where the circuit board is mounted on the target device, the circuit board moves relative to the battery cell.
Another aspect of the present invention is a battery pack. This battery pack
A battery case,
At least one battery cell housed in the battery case;
A circuit board provided on the battery cell;
A battery pack provided on the circuit board, and a terminal for electrical connection with a target device,
The circuit board is movable relative to the battery cell regardless of the mounting state on the target device.
Another aspect of the present invention is a battery pack. This battery pack
A battery case,
At least one battery cell housed in the battery case;
A circuit board provided on the battery cell;
A battery pack provided on the circuit board, and a terminal for electrical connection with a target device,
The circuit board is movable relative to the battery cell;
There is no member for fixing the circuit board to the battery cell by mounting to the target device.
前記電池ケース内で前記電池セルを所定位置に保持するセパレータを有し、
前記回路基板は、前記セパレータ上に設けられてもよい。
A separator for holding the battery cell in a predetermined position in the battery case;
The circuit board may be provided on the separator.
前記回路基板が貫通穴を有し、前記セパレータは前記貫通穴を貫く突起部を有し、前記貫通穴の内周面と前記突起部の外周面との間に隙間が存在してもよい。 The circuit board may have a through hole, the separator may have a protrusion that penetrates the through hole, and a gap may exist between the inner peripheral surface of the through hole and the outer peripheral surface of the protrusion.
前記突起部が段付き構造であり、前記突起部の段差部に前記回路基板が乗っていてもよい。 The protrusion may have a stepped structure, and the circuit board may be on the step portion of the protrusion.
前記セパレータは、前記回路基板の下面を支持する突起部と、前記回路基板の上面に隙間を持って係合する爪部と、を有してもよい。 The separator may include a protrusion that supports the lower surface of the circuit board and a claw that engages the upper surface of the circuit board with a gap.
前記回路基板は、少なくとも上面に開口する穴を有し、前記爪部は、前記穴内に延びる凸部を有し、前記穴の内周面と前記凸部の外周面との間に隙間が存在してもよい。 The circuit board has a hole that opens at least on the upper surface, the claw portion has a convex portion that extends into the hole, and a gap exists between the inner peripheral surface of the hole and the outer peripheral surface of the convex portion. May be.
前記電池セル及び前記回路基板を相互に電気的に接続するリード線を備え、前記リード線にたるみを持たせてあってもよい。 A lead wire for electrically connecting the battery cell and the circuit board may be provided, and the lead wire may have a slack.
前記電池ケースは、相互に分離可能な上ケース及び下ケースを含み、前記上ケース及び下ケースにより前記電池セルを挟持していてもよい。 The battery case may include an upper case and a lower case that are separable from each other, and the battery cell may be sandwiched between the upper case and the lower case.
本発明のもう1つの態様は、前記電池パックを着脱自在に装着した本体を備える電動工具である。 Another aspect of the present invention is an electric tool including a main body on which the battery pack is detachably attached.
本発明のもう1つの態様は、電動工具である。この電動工具は、
端子が設けられた端子ユニットを備え、電池セル及び前記端子に接続される電池側端子を有する電池パックが接続可能な電動工具であって、
前記電池側端子は前記電池セル上に設けられた回路基板に設けられ、前記回路基板は前記電池セルに対して可動する。
Another embodiment of the present invention is a power tool. This electric tool
An electric tool comprising a terminal unit provided with a terminal, to which a battery pack having a battery cell and a battery side terminal connected to the terminal can be connected,
The battery side terminal is provided on a circuit board provided on the battery cell, and the circuit board is movable with respect to the battery cell.
前記端子ユニットは本体ハウジングに対して可動してもよい。 The terminal unit may be movable relative to the main body housing.
なお、以上の構成要素の任意の組合せ、本発明の表現を方法やシステムなどの間で変換したものもまた、本発明の態様として有効である。 It should be noted that any combination of the above-described constituent elements, and those obtained by converting the expression of the present invention between methods and systems are also effective as aspects of the present invention.
本発明によれば、端子に加わる機械的負担を軽減することの可能な電池パック及びそれを装着した電動工具を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the battery pack which can reduce the mechanical burden added to a terminal, and an electric tool equipped with it can be provided.
以下、図面を参照しながら本発明の好適な実施の形態を詳述する。なお、各図面に示される同一または同等の構成要素、部材等には同一の符号を付し、適宜重複した説明は省略する。また、実施の形態は発明を限定するものではなく例示であり、実施の形態に記述されるすべての特徴やその組み合わせは必ずしも発明の本質的なものであるとは限らない。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or equivalent component, member, etc. which are shown by each drawing, and the overlapping description is abbreviate | omitted suitably. In addition, the embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.
図１は、本発明の実施の形態に係る電池パック１００の一部分解斜視図である。図１では、上部電池ケース８を上方にシフトしている。図２は、電池パック１００において保護基板５を省略した一部分解斜視図である。図３は、電池パック１００において下部電池ケース７及び上部電池ケース８を省略した右側面図である。図４は、図３のＡ−Ａ断面図である。図５は、図３のＢ−Ｂ断面図である。図６は、図３のＣ部拡大図である。図７は、図３の要部拡大図である。図８は、図７においてセパレータ６のみを抽出した要部拡大図である。図９は、セパレータ６の斜視図である。図１０は、電池パック１００において下部電池ケース７及び上部電池ケース８の左半分を切断して内部を示した左側面図である。 FIG. 1 is a partially exploded perspective view of a battery pack 100 according to an embodiment of the present invention. In FIG. 1, the upper battery case 8 is shifted upward. FIG. 2 is a partially exploded perspective view of the battery pack 100 in which the protective substrate 5 is omitted. FIG. 3 is a right side view of the battery pack 100 in which the lower battery case 7 and the upper battery case 8 are omitted. 4 is a cross-sectional view taken along line AA in FIG. 5 is a cross-sectional view taken along the line BB in FIG. FIG. 6 is an enlarged view of a portion C in FIG. FIG. 7 is an enlarged view of a main part of FIG. FIG. 8 is an enlarged view of a main part in which only the separator 6 is extracted in FIG. FIG. 9 is a perspective view of the separator 6. FIG. 10 is a left side view showing the inside by cutting the left half of the lower battery case 7 and the upper battery case 8 in the battery pack 100.
電池パック１００は、リチウムイオン二次電池等の電池セル１ａ,１ｂ,１ｃと、回路基板としての保護基板５と、電池セル１ａ,１ｂ,１ｃを所定位置に保持するセパレータ６と、電池ケースを成す下部電池ケース７及び上部電池ケース８と、ゴム等の弾性部材からなるクッション９と、を備える。保護基板５には、給電用の正極端子２及び負極端子３、並びに電圧異常や過電流、温度異常等の異常を報知するための異常信号用端子４が設けられる。相互に分離可能な下部電池ケース７及び上部電池ケース８は、ネジ止め等により相互に固定された状態で、クッション９を挟んで電池セル１ａ,１ｂ,１ｃ及びセパレータ６を挟持している。保護基板５は、セパレータ６上に設けられるが、セパレータ６にネジ等の締結部材では固定されず、後述のようにセパレータ６に対して可動する。 The battery pack 100 includes battery cells 1a, 1b, and 1c such as lithium ion secondary batteries, a protective substrate 5 as a circuit board, a separator 6 that holds the battery cells 1a, 1b, and 1c in predetermined positions, and a battery case. A lower battery case 7 and an upper battery case 8; and a cushion 9 made of an elastic member such as rubber. The protective substrate 5 is provided with a positive electrode terminal 2 and a negative electrode terminal 3 for power feeding, and an abnormal signal terminal 4 for notifying abnormality such as voltage abnormality, overcurrent, temperature abnormality and the like. The lower battery case 7 and the upper battery case 8 that are separable from each other hold the battery cells 1a, 1b, 1c and the separator 6 with the cushion 9 sandwiched therebetween while being fixed to each other by screws or the like. The protective substrate 5 is provided on the separator 6, but is not fixed to the separator 6 with a fastening member such as a screw and is movable with respect to the separator 6 as described later.
セパレータ６は、例えば樹脂製であり、図２等に示すように、爪部３１ａ,３１ｂ、リブ３２ａ,３２ｂ、リブ３３ａ,３３ｂ、及び段付き突起部３４ａ,３４ｂを有する。図５等に示すように、爪部３１ａ,３１ｂには、凸部３１ｃ,３１ｄが設けられる。リブ３２ａ,３２ｂ及びリブ３３ａ,３３ｂは、保護基板５の下面を支持する突起部の例示である。図４等に示すように、保護基板５は、断面が例えば円形の貫通穴５１ａ,５１ｂ及び貫通穴５４ａ,５４ｂを有する。図１及び図１０に示すように、保護基板５は、リブ３２ａ,３２ｂ及びリブ３３ａ,３３ｂの上面、並びに段付き突起部３４ａ,３４ｂの段差部に乗っている。段付き突起部３４ａ,３４ｂは、二段の円柱形状であり、貫通穴５４ａ,５４ｂを貫通し、先端が保護基板５の上面から突出する。 The separator 6 is made of resin, for example, and includes claw portions 31a and 31b, ribs 32a and 32b, ribs 33a and 33b, and stepped protrusions 34a and 34b as shown in FIG. As shown in FIG. 5 and the like, the claw portions 31a and 31b are provided with convex portions 31c and 31d. The ribs 32 a and 32 b and the ribs 33 a and 33 b are examples of protrusions that support the lower surface of the protective substrate 5. As shown in FIG. 4 and the like, the protective substrate 5 has through holes 51a and 51b and through holes 54a and 54b whose cross sections are circular, for example. As shown in FIGS. 1 and 10, the protective substrate 5 rides on the upper surfaces of the ribs 32a and 32b and the ribs 33a and 33b and the stepped portions of the stepped protrusions 34a and 34b. The stepped protrusions 34 a and 34 b have a two-stage cylindrical shape, pass through the through holes 54 a and 54 b, and the tips protrude from the upper surface of the protective substrate 5.
図６に示すように、段付き突起部３４ａの上段外周面と貫通穴５４ａの内周面との間には隙間が存在する。この隙間の長さは、両者が同軸となっている状態で、例えば段付き突起部３４ａの上段の径Ｄの１／１０程度とする。段付き突起部３４ｂの上段外周面と貫通穴５４ｂの内周面との間にも同様に隙間が存在する。保護基板５はセパレータ６に対してネジ等の締結部材で固定されないため、保護基板５は、段付き突起部３４ａ,３４ｂの上段外周面と貫通穴５４ａ,５４ｂの内周面との間の隙間の分だけセパレータ６に対して前後左右方向に移動可能となる。 As shown in FIG. 6, a gap exists between the upper outer peripheral surface of the stepped protrusion 34a and the inner peripheral surface of the through hole 54a. The length of the gap is, for example, about 1/10 of the upper diameter D of the stepped protrusion 34a in a state where both are coaxial. Similarly, a gap exists between the upper outer peripheral surface of the stepped protrusion 34b and the inner peripheral surface of the through hole 54b. Since the protective substrate 5 is not fixed to the separator 6 with a fastening member such as a screw, the protective substrate 5 has a gap between the upper outer peripheral surface of the stepped protrusions 34a and 34b and the inner peripheral surface of the through holes 54a and 54b. Therefore, it is possible to move in the front-rear and left-right directions with respect to the separator 6.
図７及び図１０に示すように、爪部３１ａ,３１ｂは、保護基板５の上面に僅かな隙間を持って係合する。上部電池ケース８と保護基板５の上面との間にも僅かな隙間があるため、保護基板５は、セパレータ６に対して上下方向に移動可能となる。爪部３１ａ,３１ｂと保護基板５の外縁との間にも僅かな隙間が設けられる。爪部３１ａ,３１ｂに設けられた凸部３１ｃ,３１ｄは、断面が例えば円形であり、保護基板５の貫通穴５１ａ,５１ｂ内に延びる。凸部３１ｃ,３１ｄの外周面と貫通穴５１ａ,５１ｂの内周面との間には隙間が存在する。 As shown in FIGS. 7 and 10, the claw portions 31 a and 31 b engage with the upper surface of the protective substrate 5 with a slight gap. Since there is a slight gap between the upper battery case 8 and the upper surface of the protective substrate 5, the protective substrate 5 can move in the vertical direction with respect to the separator 6. A slight gap is also provided between the claw portions 31 a and 31 b and the outer edge of the protective substrate 5. The convex portions 31 c and 31 d provided on the claw portions 31 a and 31 b have a circular cross section, for example, and extend into the through holes 51 a and 51 b of the protective substrate 5. There is a gap between the outer peripheral surfaces of the convex portions 31c and 31d and the inner peripheral surfaces of the through holes 51a and 51b.
図８及び図１０に示すように、リブ３２ａ,３２ｂは、上面のうち爪部３１ａ,３１ｂ側の端部から所定長の範囲に、傾斜面３２ｃ,３２ｄを有する。傾斜面３２ｃ,３２ｄは、爪部３１ａ,３１ｂ側に向かって下るように傾斜する。傾斜面３２ｃ,３２ｄにより、保護基板５を爪部３１ａ,３１ｂの凸部３１ｃ,３１ｄの下方に差し入れるときの作業性が良好となる。 As shown in FIGS. 8 and 10, the ribs 32 a and 32 b have inclined surfaces 32 c and 32 d in a range of a predetermined length from the end on the claw portions 31 a and 31 b side of the upper surface. The inclined surfaces 32c and 32d are inclined so as to be lowered toward the claw portions 31a and 31b. Due to the inclined surfaces 32c and 32d, workability when the protective substrate 5 is inserted below the convex portions 31c and 31d of the claw portions 31a and 31b is improved.
図１０に示すように、電池セル１ａ,１ｂ,１ｃと保護基板５との電気的接続は、リード線５５ａ,５５ｂ,５５ｃ及びその端末の例えば半田付けによって行われる。リード線５５ａ,５５ｂ,５５ｃは、セパレータ６に対する保護基板５の可動を妨げないように、またセパレータ６に対する保護基板５の移動により断線しないように、それぞれ若干のたるみを持たせてある。 As shown in FIG. 10, the electrical connection between the battery cells 1a, 1b, 1c and the protective substrate 5 is performed by, for example, soldering the lead wires 55a, 55b, 55c and their terminals. The lead wires 55a, 55b, and 55c are each provided with a slight slack so as not to hinder the movement of the protective substrate 5 with respect to the separator 6 and not to be disconnected due to the movement of the protective substrate 5 with respect to the separator 6.
図１１は、電池パック１００を装着する電動工具の本体ハウジングの分解上方斜視図である。図１２は、同分解下方斜視図である。図１３は、図１の電池パック１００を装着した電動工具の斜視図である。相互に分離可能な左側本体ハウジング１１及び右側本体ハウジング１２は、ネジ止め等によって相互に固定され、両者の間に端子ユニット１０が挟み込んで保持（固定）される。端子ユニット１０には、正極端子１０ａ、負極端子１０ｂ及び異常信号用端子１０ｃが設けられる。左側本体ハウジング１１及び右側本体ハウジング１２に電池パック１００を装着すると、正極端子１０ａ、負極端子１０ｂ及び異常信号用端子１０ｃは、電池パック１００の正極端子２、負極端子３及び異常信号用端子４と接触（嵌合）する。左側本体ハウジング１１及び右側本体ハウジング１２に対して電池パック１００は、例えば周知のラッチ機構により着脱自在である。図１３の電動工具において、左側本体ハウジング１１及び右側本体ハウジング１２の内部には不図示のモータや減速機構等が内蔵され、チャック１３にはドライバビット等の不図示の先端工具が保持される。使用者がトリガスイッチ１４を引くと、電池パック１００からの供給電力により前記モータが回転し、前記モータの回転により前記先端工具が回転駆動される。 FIG. 11 is an exploded top perspective view of the main body housing of the electric power tool to which the battery pack 100 is mounted. FIG. 12 is an exploded lower perspective view of the same. FIG. 13 is a perspective view of an electric tool equipped with the battery pack 100 of FIG. The left main body housing 11 and the right main body housing 12 that are separable from each other are fixed to each other by screwing or the like, and the terminal unit 10 is sandwiched and held (fixed) therebetween. The terminal unit 10 is provided with a positive terminal 10a, a negative terminal 10b, and an abnormal signal terminal 10c. When the battery pack 100 is mounted on the left main housing 11 and the right main housing 12, the positive terminal 10a, the negative terminal 10b, and the abnormal signal terminal 10c are connected to the positive terminal 2, the negative terminal 3, and the abnormal signal terminal 4 of the battery pack 100. Contact (fitting). The battery pack 100 can be attached to and detached from the left body housing 11 and the right body housing 12 by, for example, a known latch mechanism. In the electric tool shown in FIG. 13, a motor, a speed reduction mechanism, and the like (not shown) are built in the left main body housing 11 and the right main body housing 12, and a tip tool (not shown) such as a driver bit is held on the chuck 13. When the user pulls the trigger switch 14, the motor is rotated by power supplied from the battery pack 100, and the tip tool is rotationally driven by the rotation of the motor.
本実施の形態によれば、下記の効果を奏することができる。 According to the present embodiment, the following effects can be achieved.
(1) 電池パック１００を電動工具の本体ハウジングに装着した状態で保護基板５がセパレータ６に対して可動するため、保護基板５がセパレータ６に固定されている場合と異なり、電池パック１００と電動工具が相互に振動した際に電池パック１００の各端子が電動工具の各端子に追従移動できる。このため、端子に加わる機械的負担を軽減でき、端子の破損防止や磨耗低減が可能となる。また、端子同士のチャタリング（振動による意図しない一時的なオンオフ）の発生を防止できる。なお、振動対策として電動工具側の端子ユニット１０を左側本体ハウジング１１及び右側本体ハウジング１２に対して可動する構造も考えられるが、端子ユニット１０と電池パック１００の嵌合部のバラつきにより振動抑制機能がうまく作用しない場合がある。また、電動工具側の端子ユニット１０にはコントロール基板が一体になっている場合があり、電池パック１００の保護基板５のみの方が質量が小さく振動による振れが小さいため、電動工具側の端子ユニット１０の可動よりも、電池パック１００の保護基板５が可動することの方が端子への機械的負担をより小さくすることができる。なお、本実施の形態では、保護基板５の可動と端子ユニット１０の可動との併用により、さらに有効的に端子への機械的負担の軽減を図ることが可能である。 (1) Since the protective substrate 5 is movable with respect to the separator 6 in a state where the battery pack 100 is mounted on the body housing of the electric tool, the battery pack 100 is electrically connected to the separator 6 unlike the case where the protective substrate 5 is fixed to the separator 6. When the tools vibrate with each other, the terminals of the battery pack 100 can move following the terminals of the electric power tool. For this reason, the mechanical load applied to the terminal can be reduced, and the terminal can be prevented from being damaged or worn. Further, chattering between terminals (unintentional temporary on / off due to vibration) can be prevented. As a countermeasure against vibration, a structure in which the terminal unit 10 on the electric tool side is movable with respect to the left main body housing 11 and the right main body housing 12 is also conceivable. May not work well. In addition, there is a case where the control board is integrated with the terminal unit 10 on the power tool side, and only the protective board 5 of the battery pack 100 has a smaller mass and less vibration due to vibration. The movement of the protective substrate 5 of the battery pack 100 can reduce the mechanical burden on the terminals more than the movement of 10. In the present embodiment, it is possible to more effectively reduce the mechanical burden on the terminals by using both the movement of the protective substrate 5 and the movement of the terminal unit 10.
(2) 保護基板５をセパレータ６に対してネジ等の締結部材で固定しないため、電池パック１００の組立作業性が良い。 (2) Since the protective substrate 5 is not fixed to the separator 6 with a fastening member such as a screw, the assembly workability of the battery pack 100 is good.
(3) 電池セル１ａ,１ｂ,１ｃと保護基板５との電気的接続をリード線５５ａ,５５ｂ,５５ｃによって行うため、金属端子同士の接触による電気的接続の場合と異なり、保護基板５がセパレータ６に対して可動する構成であってもチャタリングの発生を防止することができる。また、リード線５５ａ,５５ｂ,５５ｃにたるみを持たせてあるため、リード線５５ａ,５５ｂ,５５ｃは、セパレータ６に対する保護基板５の可動を妨げず、またセパレータ６に対する保護基板５の移動により断線しにくい。 (3) Since the electrical connection between the battery cells 1a, 1b, and 1c and the protective substrate 5 is performed by the lead wires 55a, 55b, and 55c, the protective substrate 5 is a separator, unlike the electrical connection by contact between metal terminals. Even if the configuration is movable with respect to 6, chattering can be prevented. In addition, since the lead wires 55a, 55b, and 55c have slack, the lead wires 55a, 55b, and 55c do not hinder the movement of the protective substrate 5 with respect to the separator 6, and are disconnected due to the movement of the protective substrate 5 with respect to the separator 6. Hard to do.
以上、実施の形態を例に本発明を説明したが、実施の形態の各構成要素や各処理プロセスには請求項に記載の範囲で種々の変形が可能であることは当業者に理解されるところである。以下、変形例について触れる。電池パック１００の装着先（対象機器）は、電動工具以外の電気機器であってもよい。 The present invention has been described above by taking the embodiment as an example. However, it is understood by those skilled in the art that various modifications can be made to each component and each processing process of the embodiment within the scope of the claims. By the way. Hereinafter, modifications will be described. The mounting destination (target device) of the battery pack 100 may be an electrical device other than the power tool.
１ａ,１ｂ,１ｃ：電池セル、２：正極端子、３：負極端子、４：異常信号用端子、５：保護基板（回路基板）、６：セパレータ、７：下部電池ケース、８：上部電池ケース、９：クッション 、１０：端子ユニット、１０ａ：正極端子、１０ｂ：負極端子、１０ｃ：異常信号用端子、１１：左側本体ハウジング、１２：右側本体ハウジング、１３：チャック（先端工具保持部）、１４：トリガスイッチ、３１ａ,３１ｂ：爪部、３１ｃ,３１ｄ：凸部、３２ａ,３２ｂ：リブ（突起部）、３２ｃ,３２ｄ 傾斜面、３３ａ,３３ｂ：リブ（突起部）、３４ａ,３４ｂ：段付き突起部、５１ａ,５１ｂ：貫通穴、５４ａ,５４ｂ：貫通穴、５５ａ,５５ｂ,５５ｃ：リード線 1a, 1b, 1c: battery cell, 2: positive electrode terminal, 3: negative electrode terminal, 4: abnormal signal terminal, 5: protective substrate (circuit board), 6: separator, 7: lower battery case, 8: upper battery case , 9: cushion, 10: terminal unit, 10a: positive terminal, 10b: negative terminal, 10c: abnormal signal terminal, 11: left body housing, 12: right body housing, 13: chuck (tip tool holder), 14 : Trigger switch, 31a, 31b: claw part, 31c, 31d: convex part, 32a, 32b: rib (projection part), 32c, 32d inclined surface, 33a, 33b: rib (projection part), 34a, 34b: stepped Projection, 51a, 51b: through hole, 54a, 54b: through hole, 55a, 55b, 55c: lead wire
Claims (13)
前記電池ケース内に収納された少なくとも１つの電池セルと、
前記電池セル上に設けられた回路基板と、
前記回路基板上に設けられた、対象機器との電気的接続用の端子と、を備える電池パックであって、
前記対象機器に装着された状態において、前記回路基板が前記電池セルに対して可動する、電池パック。 A battery case,
At least one battery cell housed in the battery case;
A circuit board provided on the battery cell;
A battery pack provided on the circuit board, and a terminal for electrical connection with a target device,
A battery pack in which the circuit board is movable relative to the battery cell in a state of being mounted on the target device .
前記電池ケース内に収納された少なくとも１つの電池セルと、 At least one battery cell housed in the battery case;
前記電池セル上に設けられた回路基板と、 A circuit board provided on the battery cell;
前記回路基板上に設けられた、対象機器との電気的接続用の端子と、を備える電池パックであって、 A battery pack provided on the circuit board, and a terminal for electrical connection with a target device,
前記対象機器への装着状態にかかわらず前記回路基板が前記電池セルに対して可動する、電池パック。 A battery pack in which the circuit board is movable relative to the battery cell regardless of a state of being mounted on the target device.
前記電池ケース内に収納された少なくとも１つの電池セルと、 At least one battery cell housed in the battery case;
前記電池セル上に設けられた回路基板と、 A circuit board provided on the battery cell;
前記回路基板上に設けられた、対象機器との電気的接続用の端子と、を備える電池パックであって、 A battery pack provided on the circuit board, and a terminal for electrical connection with a target device,
前記回路基板が前記電池セルに対して可動し、 The circuit board is movable relative to the battery cell;
前記対象機器への装着によって前記回路基板を前記電池セルに対して固定する部材を有さない、電池パック。 A battery pack that does not have a member that fixes the circuit board to the battery cell by being attached to the target device.
前記回路基板は、前記セパレータ上に設けられる、請求項１から３のいずれか一項に記載の電池パック。 A separator for holding the battery cell in a predetermined position in the battery case;
The battery pack according to any one of claims 1 to 3 , wherein the circuit board is provided on the separator.
前記電池側端子は前記電池セル上に設けられた回路基板に設けられ、前記回路基板は前記電池セルに対して可動する、電動工具。 An electric tool comprising a terminal unit provided with a terminal, to which a battery pack having a battery cell and a battery side terminal connected to the terminal can be connected,
The battery-side terminal is provided on a circuit board provided on the battery cell, and the circuit board is movable with respect to the battery cell.
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| JP2014067168A JP6252771B2 (en) | 2014-03-27 | 2014-03-27 | Battery pack and power tool |
| DE202015100872.4U DE202015100872U1 (en) | 2014-03-27 | 2015-02-24 | Battery pack and electrical tool |
| CN201520121694.4U CN204577503U (en) | 2014-03-27 | 2015-03-02 | Battery pack and electric tool |
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| JP4977533B2 (en) * | 2007-06-07 | 2012-07-18 | 株式会社マキタ | Portable electric tool |
| JP5436850B2 (en) * | 2008-12-19 | 2014-03-05 | 株式会社マキタ | Power tool battery pack |
| JP2011009023A (en) * | 2009-06-25 | 2011-01-13 | Hitachi Koki Co Ltd | Battery pack |
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2014
- 2014-03-27 JP JP2014067168A patent/JP6252771B2/en active Active
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2015
- 2015-02-24 DE DE202015100872.4U patent/DE202015100872U1/en active Active
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| CN204577503U (en) | 2015-08-19 |
| DE202015100872U1 (en) | 2015-04-23 |
| JP2015191741A (en) | 2015-11-02 |
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