WO2014030339A2 - Bloc batterie et dispositif électrique - Google Patents

Bloc batterie et dispositif électrique Download PDF

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Publication number
WO2014030339A2
WO2014030339A2 PCT/JP2013/004908 JP2013004908W WO2014030339A2 WO 2014030339 A2 WO2014030339 A2 WO 2014030339A2 JP 2013004908 W JP2013004908 W JP 2013004908W WO 2014030339 A2 WO2014030339 A2 WO 2014030339A2
Authority
WO
WIPO (PCT)
Prior art keywords
battery pack
housing case
hole
battery
main body
Prior art date
Application number
PCT/JP2013/004908
Other languages
English (en)
Other versions
WO2014030339A3 (fr
Inventor
Tetsuhiro Harada
Tomomasa Nishikawa
Original Assignee
Hitachi Koki 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
Priority claimed from JP2012183088A external-priority patent/JP2014041742A/ja
Priority claimed from JP2012216577A external-priority patent/JP2014072020A/ja
Application filed by Hitachi Koki Co., Ltd. filed Critical Hitachi Koki Co., Ltd.
Publication of WO2014030339A2 publication Critical patent/WO2014030339A2/fr
Publication of WO2014030339A3 publication Critical patent/WO2014030339A3/fr

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Classifications

    • 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
    • B25F5/02—Construction of casings, bodies or handles
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/227—Organic material
    • 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
    • H01M50/273—Lids or covers for the racks or secondary casings characterised by the material
    • H01M50/278—Organic 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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]
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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

Definitions

  • the present invention relates to a battery pack which is attachable/detachable to/from an electric-device main body and relates to an electric device having the electric-device main body and the battery pack.
  • Patent Literature 1 an electric device provided with an electric-device main body and a battery pack which is attachable/detachable to/from the electric-device main body has been known, and an example thereof is described in Patent Literature 1.
  • an electric power tool is described as an example of the electric device, and the electric power tool has a casing and a grip.
  • An electric motor is provided inside the casing, and a plate-like device-side terminal is provided at an end of the grip.
  • a battery pack described in Patent Literature 1 is configured to be detachable/attachable to/from the grip.
  • the battery pack has a housing case, and the housing case has a case main body which houses a group of battery cells and a cover which covers an opening of the case main body.
  • the cover has a plurality of terminal insertion ports and insertion ports.
  • a circuit board is electrically connected to electrodes of battery cells via a connecting plate and a lead wire.
  • a plurality of battery-side terminals are attached to the circuit board.
  • a protecting cover is attached onto the circuit board.
  • the group of battery cells and the circuit board are housed in the case main body, and then, an opening thereof is closed by the cover, so that the battery pack is unified.
  • the protecting cover is arranged between the circuit board and the insertion port.
  • a preferred aim of the present invention is to provide a battery pack and an electric device capable of preventing the short-circuit between the electrodes of the battery cell caused when the foreign substances enter the inside of the housing case.
  • a battery pack of an embodiment is a battery pack having a housing case which houses a battery cell having electrodes and which is attachable/detachable to/from an electric-device main body, the battery pack has: a holder which is provided inside the housing case and which has a holding part for housing the battery cell; and a cover member which covers the holding part.
  • an electric device of another embodiment is an electric device having a battery pack in which a battery cell is housed in a housing case and having an electric-device main body to/from which the battery pack is attachable/detachable, the battery pack has: a holder which is provided inside the housing case and which has a holding part for housing the battery cell; and a cover member which covers the holding part.
  • a battery pack of another embodiment is a battery pack having a housing case which houses a battery cell and which is attachable/detachable to/from an electric-device main body, the housing case has: a bottom part; a first wall part which is provided continuously from the bottom part; and a first through-hole which penetrates through the first wall part, and a part of an inner peripheral surface of the first through-hole is positioned to be adjacent to an inner surface of the bottom part.
  • a battery pack of another embodiment is a battery pack having a housing case which houses a battery cell and which is attachable/detachable to/from an electric-device main body, the housing case has: a bottom part; a third wall part which is provided continuously from the bottom part and which faces an end of the battery cell; and a fourth through-hole which penetrates through the third wall part.
  • a battery pack of another embodiment is a battery pack having a housing case which houses a battery cell and which is attachable/detachable to/from an electric-device main body, the housing case has: a bottom part in contact with an object on which the housing case is placed; and a fifth wall part which is provided continuously from the bottom part, the fifth wall part is provided with a first drainage hole from which water inside the housing case is drained to outside of the housing case, and a part of an inner peripheral surface of the first drainage hole is positioned on the same plane as an inner surface of the bottom part.
  • An electric device of another embodiment is an electric device having a battery pack in which a battery cell is housed in a housing case and having an electric-device main body to/from which the battery pack is attachable/detachable, and the battery pack has: a holder which is provided inside the housing case and which has a holding part for housing the battery cell; and a cover member which covers the holding part.
  • the holding part in which the battery cell is housed can be sealed with the cover member. Therefore, short-circuit between the electrodes of the battery cell can be prevented.
  • FIG. 1 is a perspective view illustrating an electric device of the present invention
  • FIG. 2 is an exploded perspective view illustrating a battery pack of the present invention
  • FIG. 3 is a cross-sectional view of a holder housed in the battery pack of the present invention
  • FIG. 4 is a perspective view of the holder housed in the battery pack of the present invention
  • FIG. 5 is a cross-sectional view of the holder housed in the battery pack of the present invention
  • FIG. 6A is a perspective view of an insulating member used for the holder of FIG. 5
  • FIG. 6B is a development view of the insulating member used for the holder of FIG. 5;
  • FIG. 7 is a perspective view illustrating an electric power tool which is an example of the electric device of the present invention
  • FIG. 8 is a perspective view illustrating an example of a battery pack of the present invention
  • FIG. 9 is an exploded perspective view of the battery pack illustrated in FIG. 8
  • FIG. 10 is a cross-sectional view of the battery pack illustrated in FIG. 9
  • FIG. 11 is a cross-sectional view illustrating a case main body of the battery pack illustrated in FIGs. 8 to 10
  • FIG. 12 is a conceptual view of a state that the battery pack of the present invention is placed on a charger
  • FIG. 13 is a perspective view illustrating another example of the battery pack of the present invention.
  • FIG. 1 illustrates a schematic configuration of an electric power tool 30 which is an example of the electric device.
  • the electric power tool 30 has a tool main body 10 and a battery pack 12.
  • the tool main body 10 is provided with a casing 10a, a grip part 10b, and an attachment part 10c.
  • An electric motor M is housed inside the casing 10a.
  • the casing 10a is connected to one end of the grip part 10b, and the attachment part 10c is provided at the other end of the grip part 10b.
  • a concave part 10d is formed in the attachment part 10c, and a plurality of device-side terminals 11 are provided at the concave part 10d.
  • a circuit board which controls the electric motor M is provided inside the grip part 10b, and the plurality of device-side terminals 11 are connected to the circuit board.
  • the battery pack 12 is attachable/detachable to/from the attachment part 10c. That is, the electric power tool 30 is a cordless-type tool to which a cord for supplying electric power to the electric motor M is not connected. Note that a tip tool 24 is attachable/detachable to/from the casing 10a. When motive power is transmitted from the electric motor M to the tip tool 24, the tip tool 24 performs rotary motion or reciprocating motion around an axis line A. That is, the electric power tool 30 includes a drill, a driver, a hammer, a hammer drill, and a hammer driver.
  • embodiments of the battery pack 12 will be sequentially explained.
  • the battery pack 12 has a plurality of battery cells 13, a holder 14, and a housing case 15. Each of the battery cells 13 is a secondary battery which can be repeatedly charged and discharged.
  • the battery cell 13 includes a lithium-ion battery cell, a nickel-hydrogen battery cell, a lithium-ion polymer battery cell, and a nickel-cadmium battery cell.
  • the battery cell 13 has: a body part 13a having a cylindrical shape; and electrodes 13b provided at both ends of the body part 13a in a direction along a center line B thereof.
  • the two electrodes 13b provided at the electrode cell 13 have different polarities from each other. That is, one of the two electrodes 13b is an anode, and the other is a cathode.
  • the holder 14 holds the plurality of battery cells 13, and the holder 14 has a role as an insulator for covering the plurality of battery cells 13.
  • the plurality of battery cells 13 can be also referred to as a group of the battery cells 13.
  • the housing case 15 is an element which houses the holder 14 holding the plurality of battery cells 13.
  • the housing case 15 has a case main body 16 and a cover 17 which closes an opening 16a of the case main body 16. All of the holder 14, the case main body 16, and the cover 17 are separately formed from each other so as to be made of an electrically-non-conductive material.
  • the electrically-non-conductive material includes a resin material.
  • the holder 14 has eight holding holes 14a. Each of the eight holding holes 14a is a space having a cylindrical shape. In the holder 14, four holding holes 14a are aligned in one row, and a group of the holding holes 14a are formed in two rows. The center lines of the holding holes 14a are parallel to the other.
  • the holder 14 has openings 14b and 14c which are formed on respective both ends of the eight holding holes 14a in a direction along the center line. The openings 14b and 14c are commonly used by the eight holding holes 14a.
  • the holder 14 holds the eight battery cells 13 by inserting the battery cells 13 into the respective holding holes 14a. Further, a temperature sensor which detects a temperature of the battery cells 13 is provided at the opening 14b or the opening 14c.
  • the electrodes 13b of the battery cells 13 held in the holder 14 are connected to each other by a connecting member 18.
  • the eight electrodes 13b positioned at one opening 14b are connected to each other so that four of the electrodes 13b grouped as one set are connected to each other by one connecting member 18. More specifically, the four battery cells 13 which are vertically and horizontally adjacent to each other are grouped as one set, and the cathodes of the two battery cells and the anodes of the two battery cells are serially connected to each other by one connecting member 18.
  • the four electrodes 13b positioned at the center are serially connected to each other by one connecting member 18.
  • the four electrodes 13b include two cathodes and two anodes.
  • the cathodes of the electrodes 13b of the battery cells 13 positioned on both sides of the four electrodes 13b are connected to each other by one connecting member 18, and the anodes thereof are connected to each other by one connecting member 18.
  • the connecting member 18 for electrically connecting the electrodes 13b to each other is made of a metal material having electrical conductivity.
  • the metal material includes not only copper, aluminum, etc. but also a material obtained by nickel-plating a surface of a rolled steel plate. Also, it is preferred that the connecting member 18 has a plate-like shape.
  • a circuit board 19 is fixed to the holder 14.
  • the circuit board 19 is made of an electrically-non-conductive resin material, and a plurality of battery-side terminals 20 are attached to the circuit board 19.
  • Each of the plurality of battery-side terminals 20 is made of an electrically-conductive metal material.
  • Each of the plurality of battery-side terminals 20 is connected to an electric circuit.
  • the plurality of battery-side terminals 20 are protruded and extended from a surface of the circuit board 19.
  • the connecting member 18 provided on the opening 14b side is connected to the circuit board 19 via an electrically-conductive lead wire 22.
  • the connecting member 18 provided in the opening 14c is connected to the circuit board 19 via a lead wire.
  • the electric circuits are formed on the circuit board 19, and the electric circuits are connected to the plurality of battery-side terminals 20.
  • the connecting member 18 connecting the cathodes to each other is connected to the battery-side terminal 20 for a cathode, and the connecting member 18 connecting the anodes to each other is connected to the battery-side terminal 20 for an anode.
  • the temperature sensor is connected to the circuit board 19.
  • the opening 14b of the holder 14 is separately covered with an insulating member 21a.
  • the insulating member 21a has a plate-like shape.
  • An outer peripheral shape of the insulating member 21a is a shape formed along an edge of the holder 14 forming the opening 14b.
  • the insulating member 21a is made of a material having at least one function of an electrically insulating function, a water-proof function, and a dust-proof function.
  • the material making the insulating member 21a includes an insulating tape or an insulating sheet using a resin film as a base material, a rubber-like elastic body, a metal plate having a surface on which an insulating layer made of a resin material is formed, and others.
  • the insulating member 21a is fixed to the holder 14.
  • a window part S where a part of the lead wires 22 is arranged is formed between the holder 14 and the insulating member 21a.
  • a seal member 23 which covers a region including the window part S is provided.
  • the seal member 23 is provided so as to cover a part of the outer periphery of the insulating member 21a and a peripheral edge of the opening 14b.
  • the seal member 23 is a protecting member which plays a role of preventing the short-circuit between the electrodes 13b, and besides, protects the electrodes 13b from the foreign substances such as mud, water, and dust.
  • a material making the seal member 23 includes silicon, urethane, clay and others.
  • the urethane is a compound obtained by dehydration condensation (synthesis) between an amino group and an alcohol group via a carbonyl group. Note that the urethane also includes those which are commonly called urethane such as ethyl carbamate and polyurethane. The polyurethane is included in an urethane resin.
  • the opening 14c is covered with an insulating member 21b.
  • the insulating member 21a covering the opening 14b and the insulating member 21b covering the opening 14c are physically formed of separate members from each other.
  • a window part is formed also at the opening 14c as similar to the above-described window part S. However, the window part is omitted in FIG. 2.
  • the window part formed on the opening 14c side is also covered with a seal member.
  • This seal member has the same material and the same function as those of the seal member 23.
  • the seal member 23 may be provided so as to cover the entire area of the surface of the holder 14 except for the circuit board 19.
  • the above-described case main body 16 has a bottom plate and a lateral plate 16b which is formed continuously from an outer peripheral edge of the bottom plate.
  • a ventilation hole 16c which communicates the inside and the outside of the case main body 16 is provided in the lateral plate 16b.
  • the holder 14 holding the plurality of battery cells 13 is housed inside the case main body 16.
  • a plurality of terminal insertion ports 17a are provided in the cover 17.
  • the plurality of terminal insertion ports 17a are formed in a slit shape.
  • the holder 14 holding the plurality of battery cells 13 is taken into the case main body 16, and the opening 16a of the case main body 16 is covered with the cover 17, so that the plurality of battery-side terminals 20 are inserted in the plurality of terminal insertion ports 17a. Further, a ventilation hole 17b which communicate the inside and the outside of the housing case 15 is provided in the cover 17.
  • the battery pack 12 can be attached to the attachment part 10c.
  • the battery pack 12 of the present embodiment is moved in a direction along the axis line A of the tip tool 24 and is attached to the attachment part 10c.
  • the attachment part 10c and the cover 17 are provided with a guide rail, a guide groove, and others. However, illustration thereof is omitted.
  • the battery pack 12 When the battery pack 12 is attached to the attachment part 10c, the plurality of battery-side terminals 20 and the plurality of device-side terminals 11 are connected to each other, respectively. Note that, by relatively moving the battery pack 12 and the tool main body 10 with respect to each other in an opposite direction of the above-described direction in a state that the battery pack 12 is attached to the attachment part 10c of the tool main body 10, the battery pack 12 can be detached from the attachment part 10c.
  • the battery pack 12 can be also attached to a charger.
  • the charger is a device which charges the battery cells 13 with electric power of an alternating-current power source.
  • the charger has a cooling fan.
  • the wind formed by the cooling fan enters the inside of the housing case 15 through the ventilation hole 17b, and then, is exhausted from the ventilation hole 16c. Therefore, in the battery pack 12, the inside of the housing case 15 is cooled upon the charge to the battery cells 13.
  • the electric power tool 30 is the cordless type, the electric power tool 30 can be used regardless of the place. That is, the electric power tool 30 is often used in serious environment such as an environment full of powder dust such as a building demolition work site, rainy weather, and others.
  • the opening 14b of the holder 14 is covered with the insulating member 21a. Moreover, the opening 14c is covered with the insulating member 21b so that a sealing property is ensured. Therefore, in the battery pack 12, even when the foreign substances from outside enter the inside of the housing case 15, the short-circuit between the electrodes 13b can be suppressed.
  • the short-circuit in the present embodiment includes short-circuit between the electrodes 13b having the same polarity as each other and short-circuit between the electrodes 13b having different polarities from each other. Also, since the window parts are covered with the seal members, the sealing property is further improved.
  • the durability of the battery cell 13 can be improved without a damage that affects the performance of the battery cell 13.
  • FIGs. 4 to 6 the same components as those of FIGs. 2 and 3 are denoted by the same reference symbols as those of FIGs. 2 and 3.
  • the openings 14b and 14c of the holder 14 are covered with a single insulating member 21.
  • the insulating member 21 is provided so as to surround the periphery of the holder 14.
  • the insulating member 21 has two wide parts 21c and 21d and a connecting part 21e which connects between the wide parts 21c and 21d. That is, the insulating member 21 is formed to have an endless shape.
  • the connecting member 21e has a narrower width than those of the wide parts 21c and 21d.
  • the wide part 21c has a shape which covers the opening 14b
  • the wide part 21d has a shape which covers the opening 14c.
  • the material making the insulating member 21 and the function thereof are the same as those of the insulating members 21a and 21b.
  • a structure in which the annular insulating member 21 is formed includes a structure in which the insulating member 21is formed to wholly have the endless shape as illustrated in FIG. 6A and a structure in which a part of the connecting part 21e is disconnected as illustrated in FIG. 6B.
  • Such an insulating member 21 that a part of the connecting part 21e is disconnected is wound around the holder 14, and then, is fixed by bonding ends of the connecting part 21e to each other.
  • the ends of the connecting part 21e may be overlapped with each other.
  • a body part of the battery cell is housed in the holding hole.
  • the gap between the peripheral edge of the opening and the cover member can be sealed with the seal member, so that the sealing property is improved.
  • the short-circuit between the electrodes can be prevented.
  • the holding part in which the battery cell is housed can be sealed with the cover member. Therefore, the short-circuit between the electrodes of the battery cell can be prevented.
  • the electric power tool 30 corresponds to the electric device of the present invention
  • the tool main body 10 corresponds to the electric-device main body of the present invention
  • the insulating members 21, 21a, and 21b correspond to the cover members of the present invention
  • the holding hole 14a corresponds to the holding part of the present invention.
  • each shape of the insulating members 21a and 21b may be such a shape that the window part S is not formed between the insulating members 21a, 21b and the holder 14.
  • the seal member 23 can be provided at the entire outer peripheral edges of the insulating members 21a and 21b illustrated in FIG. 2.
  • a gap formed between the outer peripheral edge of the insulating member 21 illustrated in FIG. 5 and the peripheral edge of the holder 14 forming the openings 14b and 14c can be filled with the seal member.
  • FIG. 2 and 3 each shape of the insulating members 21a and 21b may be such a shape that the window part S is not formed between the insulating members 21a, 21b and the holder 14.
  • the seal member 23 can be provided at the entire outer peripheral edges of the insulating members 21a and 21b illustrated in FIG. 2.
  • a gap formed between the outer peripheral edge of the insulating member 21 illustrated in FIG. 5 and the peripheral edge of the holder 14 forming the openings 14b and 14c can be filled with the seal
  • the window part also can be formed between the outer peripheral edge of the insulating member 21 illustrated in FIG. 5 and the peripheral edge of the holder 14 forming the openings 14b and 14c. Still further, each of the holders 14 illustrated in FIGs. 3 and 5 has the two openings 14b and 14c on both sides of the holding hole 14a.
  • the holder may have a structure having an opening on only one side of the holding hole in the center line whereas the other side thereof is covered. That is, the holding part of the present invention includes a concave part.
  • the structure electrically connecting between the connecting member 18 and the electric circuit includes a structure in which a part of the connecting member 18 in addition to the above-described lead wire 22 is extended to be directly connected with the electric circuit.
  • the battery pack 12 of the present invention includes a structure in which the battery pack is moved in the direction along the axis line A of the tip tool 24 so as to be attached to the attachment part 10c and a structure in which the battery pack is moved in a direction intersecting with the axis line A of the tip tool 24 so as to be attached to the attachment part 10c.
  • the holder in the present invention includes a structure in which battery cells less than eight are housed and a structure in which nine or more battery cells are housed.
  • a second embodiment of the present invention relates to a battery pack which is attachable/detachable to/from an electric-device main body, and to an electric device having the electric-device main body and the battery pack.
  • Patent Literature 2 a battery pack configured so as to be attachable/detachable to/from an electric device has been known, and an example of the battery pack is described in Patent Literature 2, i.e., Japanese Patent Application Laid-Open No. 2009-289694.
  • the battery pack described in Patent Literature 2 has a housing case and a battery pack housed inside the housing case.
  • the housing case is provided with an upper case and a lower case.
  • the upper case is provided with an air-intake hole
  • the lower case is provided with an air-exhaust hole.
  • Patent Literature 2 also describes a charger which charges the battery pack.
  • the charger has a main body part and a cooling fan provided in the main body part.
  • a preferred aim of the second embodiment of the present invention is to provide a battery pack and an electric device in which the water which has entered the inside of the housing case can be exhausted to the outside of the housing case.
  • FIG. 7 illustrates a schematic configuration of an electric power tool 110 which is an example of the electric device.
  • the electric power tool 110 has a tool main body 111 and a battery pack 112.
  • the battery pack 112 is attachable/detachable to/from the tool main body 111.
  • the tool main body 111 is provided with a casing 111a, a grip part 111b, and an attachment part 111c.
  • An electric motor 113 is housed inside the casing 111a.
  • the electric motor 113 has an electromagnetic coil to which electric power is supplied. Note that a fan which is driven by the motive power of the electric motor 113 is provided inside the casing 111a.
  • the electric power tool 110 is a cordless-type tool to which a cord for supplying electric power to the electric motor 113 is not connected.
  • a tip tool 114 is attachable/detachable to/from the casing 111a.
  • the tip tool 114 performs rotary motion or reciprocating motion across the axis line A. That is, the electric power tool 110 includes an impact driver, a drill, a driver, a hammer, a hammer drill, and a hammer driver.
  • the casing 111a is connected to one end of the grip part 111b, and the attachment part 111c is provided at the other end of the grip part 111b.
  • a control board which controls the electric motor 113 is provided inside the grip part 111b.
  • a concave part 111d is formed in the attachment part 111c, and a plurality of, specifically, three tool-side terminals 115 are provided at the concave part 111d.
  • the three tool-side terminals 115 include a positive terminal, a negative terminal, and a signal terminal.
  • the positive terminal and the negative terminal are connected to the electromagnetic coil of the electric motor 113 via a control element.
  • the signal terminal is connected to a circuit board which controls the electric motor 113.
  • the battery pack 112 is attachable/detachable to/from the attachment part 111c.
  • the configuration of the battery pack 112 will be explained based on FIGs. 8 to 10.
  • the battery pack 112 has a plurality of battery cells 116, a holder 117, and a housing case 118.
  • Each of the battery cells 116 is a secondary battery which can be repeatedly charged and discharged.
  • the battery cell 116 includes a lithium-ion battery cell, a nickel-hydrogen battery cell, a lithium-ion polymer battery cell, a nickel-cadmium battery cell, and others.
  • the battery cell 116 has a cylindrical shape, and two electrodes are provided on both ends of the battery cell 116 in a longitudinal direction. One of the two electrodes is a positive electrode, and the other is a negative electrode.
  • the holder 117 holds the plurality of battery cells 116 in parallel to each other, and the holder 117 is provided with a role as an insulator which covers the plurality of battery cells 116.
  • the plurality of battery cells 116 is also referred to as a group of the battery cells 116.
  • the holder 117 has a tubular shape, and the group of the battery cells 116 is housed therein.
  • the holder 117 may have a structure having openings at both ends or a structure having an opening at one end.
  • the holder 117 of the present embodiment houses the eight battery cells 116 in two rows so that the four battery cells 116 are parallely aligned in one row. And, the four battery cells 116 are formed as one set, and two sets of the battery cells 116 are serially connected individually.
  • a first connecting member is connected to the positive electrodes of the two battery cells 116 positioned on one end of one set of the four serially-connected battery cells.
  • a second connecting member is connected to the negative electrodes of the two battery cell 116 positioned on the other end of one set of the four serially-connected battery cells 116.
  • the connecting member which electrically connects between the electrodes is made of a metal material having electrical conductivity.
  • This metal material includes not only copper, aluminum, etc. but also a material obtained by nickel-plating a surface of a rolled steel plate.
  • the connecting member has a plate-like shape.
  • a surface of each of the connecting members which is on an opposite side of a part in contact with the electrode is covered with an insulating member 119.
  • a material making the insulating member includes an insulating tape or an insulating sheet using a resin film as a base material, a rubber-like elastic body, a metal plate having a surface on which an insulating layer made of a resin material is formed, and others. Note that the opening of the holder 117 or the gap between the insulating member 119 and an opening edge of the holder 117 can be covered with a sheet member having a water-proof property, silicon, clay, or others.
  • a circuit board 120 is attached to an outer side of a body part of the holder 117.
  • the circuit board 120 is made of an electrically-conductive resin material to have a flat-plate shape.
  • a plurality of battery-side terminals 121 are attached to the circuit board 120.
  • Each of the plurality of battery-side terminals 121 is made of an electrically-conductive metal material.
  • the plurality of battery-side terminals 121 include a charging positive terminal, a discharging positive terminal, a charging/discharging negative terminal, and four signal terminals.
  • the above-described first connecting member is connected to each of the charging positive terminal and the discharging positive terminal via a first lead wire.
  • the second connecting member is connected to the charging/discharging negative terminal via a second lead wire.
  • the housing case 118 is an element housing the holder 117 holding the plurality of battery cells 116.
  • the housing case 118 has a case main body 123 and a cover 124 which covers an opening 123a of the case main body 123. All of the holder 117, the case main body 123, and the cover 124 are separately made of an electrically-non-conductive material.
  • the electrically-non-conductive material includes a resin material.
  • the above-described case main body 123 has a bottom part 123b, a front wall 123c formed continuously from an outer peripheral edge of the bottom part 123b, a rear wall 123d, and two lateral walls 123e. When the case main body 123 is viewed in a plane, the bottom part 123b is substantially rectangular.
  • the front wall 123c and the rear wall 123d are connected to two parallel sides of the bottom part 123b, and are extended so as to be at a right angle with respect to the bottom part 123b. That is, the front wall 123c and the rear wall 123d are substantially parallel to each other. Also, the two lateral walls 123e are connected to two parallel sides of the bottom part 123b, and are extended so as to be at a right angle with respect to the bottom part 123b. The two lateral walls 123e are substantially parallel to each other. The two lateral walls 123e are provided so as to face an end of the battery cell 116 in a longitudinal direction. Note that, in the bottom part 123b, the two sides to which the front wall 123c and the rear wall 123d are connected and the two sides to which the two lateral walls 123e are connected are different from each other.
  • the front wall 123c is provided with a plurality of ventilation holes 131 and 132 which communicate the inside and the outside of the housing case 118. That is, the plurality of ventilation holes 131 and 132 are provided to penetrate through the front wall 123c in the thickness direction thereof.
  • the plurality of ventilation holes 131 and 132 are arranged along the height direction of the battery pack 112.
  • the height direction means a top-and-bottom direction of the housing case 118 in a state that the battery pack 112 is attached to the tool main body 111 with the substantially-horizontal axis line A of the tool main body 111.
  • the plurality of ventilation holes 131 and 132 are passages which exhaust the air inside the housing case 118 to the outside.
  • the plurality of ventilation holes 131 and 132 are provided in two rows. For each row, three ventilation holes 131 are provided in the upper side in the height direction, and one ventilation hole 132 is provided at the lowest position in the height direction. That is, in the height direction of the housing case 118, the ventilation holes 131 are provided at the positions distant from the bottom part 123b farther than the ventilation holes 132.
  • the ventilation holes 131 and 132 may have any shape such as a rectangular shape, an elliptical shape, and a circular shape. A part of an inner peripheral surface of the ventilation hole 132 is provided to be adjacent to the inner surface of the bottom part 123b.
  • the part of the inner peripheral surface of the ventilation hole 132 is provided continuously from the inner surface of the bottom part 123b. That is, the part of the inner peripheral surface of the ventilation hole 132 is positioned substantially on the same plane as the inner surface of the bottom part 123b. In the present embodiment, the part of the inner peripheral surface of the ventilation hole 132 is the lowest part of the case main body 123 in the height direction.
  • a drainage hole 133 is provided at a boundary part between the bottom part 123b and the lateral wall 23e, that is, a connecting part therebetween. That is, the drainage hole 133 is provided in the lateral wall 123e facing the ends of the battery cells 116, and besides, a part of the inner peripheral surface of the drainage hole 133 is adjacent to the inner surface of the bottom part 123b. More specifically, the part of the inner peripheral surface of the drainage hole 133 and the inner surface of the bottom part 123b are continuously provided from each other. That is, the part of the inner peripheral surface of the drainage hole 133 and the inner surface of the bottom part 123b are positioned substantially on the same plane as each other.
  • the drainage hole 133 penetrates through the case main body 123 in the thickness direction, and the inside and the outside of the housing case 118 are connected to each other by the drainage hole 133.
  • the above-described drainage hole 133 has a structure for draining the foreign substances such as water inside the housing case 118 to the outside of the housing case 118.
  • An opening area of the drainage hole 133 is smaller than an opening area of the ventilation hole 132.
  • a shape of the drainage hole 133 may be any shape such as a rectangular shape, an elliptical shape, or a circular shape. Note that the drainage hole 133 may be provided at each of the boundary parts between the two lateral walls 123e and the bottom part 123b.
  • the cover 124 has a base part 134, and a plate part 125 and a mount part 126 are provided on the base part 134.
  • the plate part 125 has a flat-plate shape which is substantially parallel to the bottom part 123b.
  • the mount part 126 is protruded upward from the plate part 125.
  • a guide rails127 which is used when the battery pack 112 is attached to the tool main body 111 is provided on each of both sides of the mount part 126. The two guide rails 127 are arranged to be parallel to each other.
  • a plurality of terminal insertion ports 128 are provided between the two guide rails 127 of the mount part 126.
  • the plurality of terminal insertion ports 128 penetrate outward from the inside of the housing case 118 in a slit shape.
  • the plurality of terminal insertion ports 128 are arranged to be parallel to the guide rails 127.
  • the plurality of terminal insertion ports 128 are arranged in one row between one guide rail 127 and the other guide rail 127. Still further, when the housing case 118 is viewed in a plane in a state that the cover 124 is attached to the case main body 123, the plurality of terminal insertion ports 128 are arranged immediately above the plurality of battery-side terminals 121.
  • a window 129 is provided at a boundary part between the mount part 126 and the plate part 125.
  • the window 129 is linearly extended in a direction at a substantially right angle with respect to the two guide rails 127.
  • the window 129 is connected to the plurality of terminal insertion ports 128.
  • the cover 124 is provided with a plurality of ventilation holes 130 which communicate the inside and the outside of the housing case 118.
  • the plurality of ventilation holes 130 are provided on an opposite side of the plate part 125 across the plurality of terminal insertion ports 128. Still further, a skirt part 135 is provided at the outer periphery of the base part 134. The skirt part 135 is extended at a substantially right angle from the base part 134. In a state that the cover 124 is attached to the case main body 123, an edge part of the skirt part 135 is in contact with an edge part of the front wall 123c and edge parts of the lateral walls 123e.
  • an operation button 150 is attached to the cover 124.
  • the operation button 150 can rotate with taking a supporting shaft 151 as a supporting point, and the operation button 150 is provided with a latch 152.
  • the cover 124 is provided with a hole 153, and a part of the latch 152 is exposed from the hole 153 to the outside of the cover 124 when the cover 241 is attached to the case main body 123.
  • the attachment part 111c is provided with a claw, and the latch 152 is configured to be engaged with the claw.
  • the charger 140 has a main body part 141, and a cooling fan 142 is provided inside the main body part 141. Also, the main body part 141 is provided with a ventilation hole 143 through which wind formed by the cooling fan 142 passes. Further, the main body part 141 is provided with a mount 144 which supports the battery pack 112, and the mount 144 is provided to be tilted with respect to a horizontal line. Also, the mount 144 is provided with a plurality of terminals 145, and the plurality of terminals 145 are connected to the plurality of battery-side terminals 121 when the battery pack 112 is placed on the mount 144.
  • the battery pack 112 and the tool main body 111 are brought to be close to each other, and the battery pack 112 is moved along the guide rails 127, so that the battery pack 112 is attached to the attachment part 111c of the tool main body 111.
  • the tool-side terminals 115 are inserted into the terminal insertion ports 128 of the cover 124, so that the tool-side terminals 115 and the battery-side terminals 121 are connected to each other.
  • the latch 152 is engaged with the claw of the attachment part 111c, so that the operation of attaching the battery pack 112 to the attachment part 111c is completed.
  • the motive power of the electric motor 113 is transmitted to the tip tool 114.
  • a part of the motive power of the electric motor 113 is transmitted to a fan attached to a rotation shaft of the electric motor 113 inside the casing 111a, and the fan is rotated to form a flow of air which cools the electric motor 113.
  • the air is taken from an air-intake hole formed in the casing 111a into the casing 111a, and cools the electric motor 113 and others.
  • the air which has cooled the electric motor 113 and others is exhausted from an air-exhaust hole formed in the casing 111a to the outside of the casing 111a.
  • the electric motor 113 is a brushless motor
  • the inverter circuit can be cooled.
  • a switching element such as a FET which is a control element for controlling the motor is provided in the inverter circuit, and therefore, the switching element can be efficiently cooled.
  • a part of the air for cooling the electric motor 113 may be configured to be fed into the grip part 111b, into the attachment part 111c, and/or into the housing case 118 through the ventilation hole 130. That is, the ventilation hole 130 functions as an air-inflow hole.
  • the air which has been fed into the housing case 118 passes through the part between the holder 117 and the inner surface of the cover 124 or the part between the holder 117 and the inner surface of the case main body 123, and is exhausted from the plurality of ventilation holes 131 and 132 to the outside of the housing case 118.
  • the air which has entered the inside of the housing case 118 passes through the part between the holder 117 and an inner surface of the rear wall 123d and the part between the holder 117 and the inner surface of the bottom part 123b, and is exhausted from the plurality of ventilation holes 131 and 132.
  • a part of the air which has entered the inside of the housing case 118 passes through the part between the holder 117 and the inner surface of the front wall 123c, and is exhausted from the plurality of ventilation holes 131 and 132.
  • the plurality of ventilation holes 131 and 132 of the case main body 123 function as air-outflow holes. According to this configuration, if a control board of the motor is arranged inside the grip part 111b, the control board can be cooled. If a heat generating part such as a switching element is provided in the control board, this part can be effectively cooled.
  • the battery pack 112 can be cooled.
  • the latch 152 is detached from the claw of the attachment part 111c by pressing the operation button 150 in the state that the battery pack 112 is attached to the tool main body 111,. Then, by relatively moving the battery pack 112 and the tool main body 111 in the opposite direction of the above-described direction, the battery pack 112 can be detached from the tool main body 111.
  • the battery cells 116 can be charged by placing the battery pack 112 detached from the tool main body 111 onto the mount 144 of the charger 140 as illustrated in FIG. 12.
  • the battery pack 112 is placed on the mount 144, the battery pack is stopped at a position where the ventilation hole 143 and the ventilation hole 130 of the housing case 118 face each other.
  • the cooling fan 142 of the charger 140 is rotated at this point, the wind formed by the cooling fan 142 enters the inside of the housing case 118 through the ventilation hole 143 and the ventilation hole 130.
  • the air which has entered the inside of the housing case 118 passes through the part between the holder 117 and the inner surface of the cover 124 or the part between the holder 117 and the inner surface of the case main body 123, and is exhausted from the plurality of ventilation holes 131 and 132 to the outside of the housing case 118. Therefore, in the battery pack 112, the inside of the housing case 118 is cooled upon the charging to the battery cells 116. More particularly, the air which has entered the part between the rear wall 123d and the holder 117 flows along the inner surface of the bottom part 123b, and then, passes through the plurality of ventilation holes 131 and 132.
  • the battery pack 112 is provided with the plurality of ventilation holes 131 and 132 on a front side in the direction of the air flow which flows along the inner surface of the bottom part 123b. Also, the drainage hole 133 is provided on a lateral side in the direction of the air flow, and the opening area of the drainage hole 133 is smaller than the opening area of the ventilation hole 132. Therefore, a resistance of the air flow which passes through the plurality of ventilation holes 131 and 132 can be decreased as much as possible. That is, in the battery pack 112, the action of linearly exhausting the air inside the housing case 118 toward the outside of the housing case 118 is smoothly performed. Therefore, decrease in the cooling performance for the battery cells 116 can be suppressed.
  • the electric power tool 110 is a cordless type, the electric power tool 110 can be used regardless of the place. That is, the electric power tool 110 is used in threatened environment such as an environment full of powder dust such as a building demolition work site, rainy weather, and others.
  • the battery pack 112 has a water-proof structure which covers the opening of the holder 117 or the gap between the insulating member 119 and the opening edge of the holder 117 with a sheet member having a water-proof property, silicon, clay, or others, the short-circuit between the battery cells 116, corrosion of the electrodes, etc. can be prevented even if water enters the inside of the housing case 118.
  • the case main body 123 is provided with the plurality of ventilation holes 131 and 132, and a part of the inner peripheral surface of the ventilation hole 132 is arranged on the same plane as the inner surface of the bottom part 123b.
  • the object 160 is a solid material; such as a table, a working table, or a road. Accordingly, the bottom part 123b of the case main body 123 is in contact with the object 160, and the inner surface of the bottom part 123b is substantially horizontal. Therefore, the water existing inside the housing case 118 flows along the inner surface of the bottom part 123b, and is drained to the outside through the ventilation hole 132.
  • the remaining of the water inside the housing case 118 can be prevented. Further, the short-circuit between the battery cells 116, corrosion of the battery cells 116, etc. can be prevented. Still further, in the battery pack 112 of the present embodiment, the plurality of ventilation holes 131 and 132 are provided in the front wall 123c. Therefore, when the battery pack 112 is placed on the object 160, the plurality of ventilation holes 131 and 132 are not covered with the object 160, so that reduction in the drainage performance can be prevented.
  • the ventilation hole 132 among the plurality of ventilation holes 131 and 132 plays both of a role as the passage through which the air inside the housing case 118 is exhausted outside and a role as the drainage hole through which the water inside the housing case 118 is drained to the outside of the housing case 118.
  • the battery pack 112 when the battery pack 112 is placed on the object 160, there is a possibility that one lateral wall 123e of the two lateral walls 123e is tilted in a direction to be lower than the other lateral wall 123e. Further, in the battery pack 112, there is a possibility that the two lateral walls 123e are alternately lowered with taking a substantially-center part of the bottom part 123b as a supporting point.
  • a part of the water existing inside the housing case 118 can be moved along the inner surface of the bottom part 123b, pass through the drainage hole 133, and be drained to the outside of the housing case 118.
  • a part of the inner peripheral surface of the drainage hole 133 and a part of the inner peripheral surface of each of the ventilation hole 132 are arranged on the same plane as the inner surface of the bottom part 123b.
  • the other part thereof may be arranged below the inner surface of the bottom part 123b. That is, the drainage hole 133 may be provided in the lateral wall 123e, and the ventilation hole 132 may be provided in the front wall 123c. And, as long as the drainage hole 133 and the ventilation hole 132 are adjacent to, that is, are continuously provided from the inner surface of the bottom part 123b, the water inside the housing case 118 can be efficiently drained to the outside of the housing case 118.
  • FIG. 13 A drainage hole 136 which penetrate through the skirt part 135 of the cover 124 in the thickness direction is provided.
  • the drainage hole 136 is provided at a location of the skirt part 135 which corresponds to the front wall 123c.
  • the other configuration of the battery pack 112 illustrated in FIG. 13 is the same as the configuration of the above-described battery pack 112.
  • a part of the water existing inside the housing case 118 is moved along the inner surfaces of the plate part 125 and the base part 134, passes through the drainage hole 136, and is drained to the outside of the housing case 118.
  • the water inside the housing case 118 can be drained to the outside of the housing case 118.
  • a part of the inner peripheral surface of the drainage hole 136 can be arranged on the substantially same plane as the inner surface of the cover 124, more specifically, as the inner surface of the plate part 125 or the inner surface of the base part 134.
  • the water existing inside the housing case 118 is flowed along the inner surface of the cover 124 and is easily drained directly from the drainage hole 136 to the outside. Further, in the same components in the battery pack 112 of FIG. 13 as those of the above-described battery pack 112, the same effects as those of the above-described battery pack 112 can be obtained.
  • water existing inside a housing case is flowed along an inner surface of a bottom part, and is drained from a first through-hole to outside of the housing case. Therefore, remaining of the water inside the housing case can be prevented.
  • water existing inside a housing case is flowed toward a boundary part between a bottom part and a first wall part, and is drained through a first through-hole to outside of the housing case.
  • water existing inside a housing case can be also drained from a second through-hole to outside of the housing case.
  • water existing inside a housing case is drained through a third through-hole to outside of the housing case.
  • water existing inside a housing case is flowed along an inner surface of a bottom part, and is drained through a third through-hole to outside of the housing case.
  • a resistance of air flow can be reduced as much as possible. Therefore, when the air is caused to enter the inside of the housing case to cool the battery cells, reduction in a cooling performance can be suppressed.
  • water existing inside a housing case is flowed along an inner surface of a bottom part, and is drained from a fourth through-hole to outside of the housing case. Therefore, remaining of the water inside the housing case can be prevented.
  • water existing inside a housing case smoothly enters a fourth through-hole from an inner surface of a bottom part, and is drained to outside of the housing case.
  • water existing inside a housing case enters a fourth through-hole along an inner surface of a bottom part, and is drained to outside of the housing case.
  • water existing inside a housing case can be also drained from a fifth through-hole to outside of the housing case.
  • water existing inside a housing case is drained through a fifth through-hole to outside of the housing case.
  • water existing inside a housing case is flowed along an inner surface of a bottom part, and is drained through a sixth through-hole to outside of the housing case.
  • a part of an inner surface of a first drainage hole is positioned on the same plane as an inner surface of a bottom part. Therefore, water existing inside the housing case is moved along the inner surface of the bottom part, passes through the first drainage hole, and is drained to outside. Therefore, remaining of the water inside the housing case can be prevented.
  • air outside a housing case passes through a ventilation hole and enters inside of the housing case, and the air which has entered the inside of the housing case passes through a first drainage hole and is exhausted to outside of the housing case. That is, the first drainage hole can be commonly used as an exhaust hole of the air.
  • water existing inside a housing case can be drained from not only a first drainage hole but also a second drainage hole.
  • a resistance of air flow can be reduced as much as possible. Therefore, when the air is caused to enter the inside of the housing case to cool battery cells, reduction in a cooling performance can be suppressed.
  • an electric device of the second embodiment when a housing case is placed on an object in a state that a battery pack is attached to an electric-device main body, a part of an inner surface of a first drainage hole is positioned on the same plane as an inner surface of a bottom part. Therefore, water existing inside the housing case is moved along the inner surface of the bottom part, passes through the first drainage hole, and is drained to outside. Therefore, remaining of the water inside the housing case can be prevented.
  • the tool main body 111 corresponds to an electric-device main body of the present invention
  • the front wall 123c corresponds to a first wall part, a fourth wall part, and a fifth wall part of the present invention
  • the lateral wall 123e corresponds to a second wall part, a third wall part, and a sixth wall part of the present invention
  • the ventilation hole 131 corresponds to a second through-hole and a sixth through-hole of the present invention
  • the ventilation hole 132 corresponds to a first through-hole, a fifth through-hole, and a first drainage hole of the present invention
  • the ventilation hole 130 corresponds to a ventilation hole of the present invention
  • the drainage hole 136 corresponds to a third drainage hole of the present invention
  • the drainage hole 133 corresponds to a third through-hole, a fourth through-hole, and a second drainage hole of the present invention.
  • the electric device to/from which the battery pack of the present invention is attached/detached includes not only the above-described electric power tools but also a grinder, a sander, a nail driver, a (powered) screw driver, a tacker, a dust collector, a blower, a pump, a high-pressure cleaning machine, a chainsaw, a grass cutter, a hedge trimmer, a (rotary) tiller, and others.
  • the electric device of the present invention includes a device in which an electric motor is rotated by electric power of a battery pack and in which the rotary motion is converted into at least either a reciprocating motion or a rotary motion of an operating member.
  • the electric device of the present invention includes a torch light and others. That is, the electric device of the present invention includes a lighting device in which electric energy supplied from the battery pack is converted into optical energy.
  • the present invention can be utilized in a battery pack which is attachable/detachable to/from a portable electric-device main body, and in a portable electric device having the electric-device main body and the battery pack.

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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)

Abstract

La présente invention a trait à un bloc batterie qui est en mesure d'empêcher tout court-circuit entre les électrodes d'un élément de batterie lorsque des corps étrangers entrent à l'intérieur d'un boîtier de logement. Un bloc batterie (12) selon la présente invention est équipé d'un boîtier de logement (15) qui contient un élément de batterie (13) qui est pourvu d'électrodes et qui peut être fixé sur une partie de fixation d'une machine-outil électrique portative et détaché de ladite partie de fixation, d'un élément de support (14) qui est prévu à l'intérieur du boîtier de logement (15), l'élément de batterie (13) étant reçu dans l'élément de support (14). Une ouverture (14b) est formée dans l'élément de support (14) et un élément isolant (21b) qui recouvre l'ouverture (14b) est prévu. Le boîtier de logement (15) est équipé d'un orifice d'insertion de borne (17a). Même lorsque des corps étrangers entrent à l'intérieur du boîtier de logement (15), les corps étrangers n'entrent pas dans l'ouverture (14b).
PCT/JP2013/004908 2012-08-22 2013-08-20 Bloc batterie et dispositif électrique WO2014030339A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2012183088A JP2014041742A (ja) 2012-08-22 2012-08-22 電池パック及び電気機器
JP2012-183088 2012-08-22
JP2012216577A JP2014072020A (ja) 2012-09-28 2012-09-28 電池パック及び電気機器
JP2012-216577 2012-09-28

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WO2014030339A2 true WO2014030339A2 (fr) 2014-02-27
WO2014030339A3 WO2014030339A3 (fr) 2014-05-08

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105161643A (zh) * 2015-08-14 2015-12-16 江苏绿伟锂能有限公司 一种用于手持电动工具的锂电池组
CN108058083A (zh) * 2016-11-07 2018-05-22 南京德朔实业有限公司 电池包和电动工具
GB2535328B (en) * 2015-02-10 2019-08-28 Techtronic Ind Co Ltd A battery assembly, and a battery carriage for use in a power tool and a battery charger
US10629869B2 (en) 2015-10-28 2020-04-21 Murata Manufacturing Co., Ltd. Electronic apparatus case and battery pack including the same
US20210005941A1 (en) * 2019-07-05 2021-01-07 Contemporary Amperex Technology Co., Limited Battery pack
US11183730B2 (en) 2016-04-05 2021-11-23 Murata Manufacturing Co., Ltd. Battery pack and electronic device including the same
CN114616714A (zh) * 2019-12-03 2022-06-10 三洋电机株式会社 电池组
US11670808B2 (en) 2019-12-03 2023-06-06 Milwaukee Electric Tool Corporation Charger and charger system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008066141A (ja) 2006-09-07 2008-03-21 Hitachi Koki Co Ltd 電池パック及び電池パックを用いた電動工具
JP2009289694A (ja) 2008-05-30 2009-12-10 Hitachi Koki Co Ltd 電池パック

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3742261B2 (ja) * 1999-11-10 2006-02-01 株式会社マキタ 電動工具用バッテリーパック
JP4458024B2 (ja) * 2005-11-17 2010-04-28 パナソニック電工株式会社 電動工具
JP5370709B2 (ja) * 2007-10-29 2013-12-18 日立工機株式会社 電池パック及びこれを備えた電動工具
JP5436850B2 (ja) * 2008-12-19 2014-03-05 株式会社マキタ 電動工具のバッテリパック
JP2012054138A (ja) * 2010-09-02 2012-03-15 Makita Corp 工具用バッテリ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008066141A (ja) 2006-09-07 2008-03-21 Hitachi Koki Co Ltd 電池パック及び電池パックを用いた電動工具
JP2009289694A (ja) 2008-05-30 2009-12-10 Hitachi Koki Co Ltd 電池パック

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2535328B (en) * 2015-02-10 2019-08-28 Techtronic Ind Co Ltd A battery assembly, and a battery carriage for use in a power tool and a battery charger
CN105161643A (zh) * 2015-08-14 2015-12-16 江苏绿伟锂能有限公司 一种用于手持电动工具的锂电池组
US10629869B2 (en) 2015-10-28 2020-04-21 Murata Manufacturing Co., Ltd. Electronic apparatus case and battery pack including the same
US11183730B2 (en) 2016-04-05 2021-11-23 Murata Manufacturing Co., Ltd. Battery pack and electronic device including the same
CN108058083A (zh) * 2016-11-07 2018-05-22 南京德朔实业有限公司 电池包和电动工具
US20210005941A1 (en) * 2019-07-05 2021-01-07 Contemporary Amperex Technology Co., Limited Battery pack
US11611116B2 (en) * 2019-07-05 2023-03-21 Contemporary Amperex Technology Co., Limited Battery pack
CN114616714A (zh) * 2019-12-03 2022-06-10 三洋电机株式会社 电池组
US11670808B2 (en) 2019-12-03 2023-06-06 Milwaukee Electric Tool Corporation Charger and charger system
CN114616714B (zh) * 2019-12-03 2024-03-12 松下新能源株式会社 电池组
US12015130B2 (en) 2019-12-03 2024-06-18 Milwaukee Electric Tool Corporation Charger and charger system

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