JP4400582B2 - Charging device and rechargeable battery set provided with the same - Google Patents

Description

  The present invention relates to a battery pack charging device provided in an electric tool or the like and a rechargeable battery set including the same.

  For example, the rechargeable power tool 2 shown in FIG. 8 has a battery pack 3 shown in FIG. 9A attached thereto in a detachable manner. As the battery pack 3, a nickel cadmium battery (Ni—Cd battery), A battery equipped with a nickel metal hydride battery (Ni-MH battery) is used. Here, the electric tool 2 shown in FIG. 8 is a pistol type impact driver in which a handle portion 7 protrudes in a direction intersecting from an end portion of a cylindrical main body portion 6, and is a motor (not shown) built in the main body portion 6. ) Is driven so that the output unit 8 can be driven via a speed reduction unit (not shown). A battery pack attachment portion 9 is formed at the end of the handle portion 7 opposite to the main body portion 6, and the first battery pack 3 a or the second battery pack 3 b is detachably attached to the battery pack attachment portion 9. Used in. Here, for example, Patent Document 1 discloses a rechargeable power tool and a charging device that charges a battery pack of the rechargeable power tool.

  In recent years, battery packs equipped with lithium-ion batteries have been used for the purpose of downsizing the battery pack, and at present, the electric tool equipped with the former battery pack and the electric tool equipped with the latter battery pack are mixed. These different types of battery packs are charged using, for example, the charging device 1 shown in FIG.

Here, different types of battery packs were charged by dedicated charging devices corresponding to the respective battery packs, but each battery pack requires a dedicated charging device, so the different types of battery packs In the case of using a mixture of electric tools equipped with a large number of charging devices, it is inconvenient.
JP-A-2005-342796

  This invention is invented in view of the said conventional problem, Comprising: It aims at providing a small battery charger which can charge a different kind of battery pack, and a rechargeable battery set provided with the same. .

  In order to solve the above-described problem, the charging device according to claim 1 of the present invention is characterized in that the first fitting portion 30 capable of fitting the first battery pack 3a into the outer surface of the housing 18 and the first battery pack 3a are of a kind. The second insertion part 31 into which the different second battery pack 3b can be inserted is formed, and between the first insertion part 30 and the second insertion part 31 of the housing 18 and the first battery pack 3a and The overlapping parts 54 and 55 which are the parts which overlap in the state which the 2nd battery pack 3b was inserted in each of the 1st to-be-inserted part 30 and the 2nd to-be-inserted part 31, and each was arrange | positioned in the charging position oppose. The blower outlet 36 is formed at the position, and the second battery pack fitted into the overlapping portion 54 of the first battery pack 3 a fitted into the first fitted portion 30 or the second fitted portion 31 in the housing 18. For cooling to send wind from the outlet 36 to the overlapping part 55 of 3b It is characterized in that comprising providing a fan 39.

  By having the said structure, the 1st battery pack 3a can be inserted in the 1st insertion part 30 of the charging device 1, and the 1st battery pack 3a can be charged, and the 2nd battery pack can be charged in the 2nd insertion part 31. The second battery pack 3b can be charged by fitting 3b, and two types of battery packs, the first battery pack 3a and the second battery pack 3b, can be charged by one charging device 1. Moreover, when the first battery pack 3a and the second battery pack 3b are fitted into the first fitted part 30 and the second fitted part 31, respectively, and are arranged at the charging position, the position is opposed to the air outlet 36. Since the overlapping portions 54 and 55 overlap each other, it is possible to prevent the first battery pack 3a and the second battery pack 3b from being attached to the charging device 1 at the same time. Further, in addition to the overlapping portion 54 of the first battery pack 3 a fitted into the first fitting portion 30, the air from the fan 39 is overlapped with the second battery pack 3 b fitted into the second fitting portion 31. The first battery pack 3a or the second battery pack 3b that becomes high temperature during charging can be cooled by the single fan 39, and the charging device 1 can be downsized.

  A rechargeable battery set according to claim 2 of the present invention is a rechargeable battery set including at least one of the charging device 1 according to claim 1 and the first battery pack 3a or the second battery pack 3b. The battery pack 3a (or 3b) is fitted into the first fitting portion 30 or the second fitting portion 31 at the outer surface of the overlapping portions 54 and 55 of the battery pack 3a (or 3b). The vent 17 (or 28) communicating with the inside of the battery pack 3a (or 3b) is formed at a position facing the air outlet 36.

  The rechargeable battery set having the above-described configuration can charge two types of battery packs, the first battery pack 3a and the second battery pack 3b, with one charging device 1, and the first battery pack 3a and the second battery pack 3b are simultaneously It can prevent being attached to the charging device 1. In addition, the battery pack is blown from the air vent 17 (or 28) of the battery pack 3a (or 3b) in which the wind from the fan 39 blown out from the air outlet 36 of the charging device 1 is fitted into the fitting portion 30 (or 31). The battery pack 3a (or 3b) can be efficiently cooled from the inside by flowing into 3a (or 3b).

  In the charging device of the present invention, the first battery pack can be charged by fitting the first battery pack in the first fitting portion, and the second battery pack can be charged by inserting the second battery pack in the second fitting portion. The two battery packs can be charged, and the first battery pack and the second battery pack can be prevented from being simultaneously attached to the charging device. Moreover, the air blown from the fan can be sent to both the first battery pack and the second battery pack, whereby the first battery pack and the second battery pack can be cooled by a single fan, and the apparatus can be miniaturized.

  The rechargeable battery set of the present invention can charge two types of battery packs, the first battery pack and the second battery pack, with a single charging device, and the first battery pack and the second battery pack are simultaneously mounted on the charging device. Can be prevented. Furthermore, it can cool efficiently by sending air into the first battery pack and the second battery pack.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  A charging device 1 shown in FIG. 1 charges a battery pack used as a secondary battery of the electric tool 2. The charging device 1 includes a first battery pack 3a shown in FIG. 4 in which a cell 4a made of a nickel cadmium battery or a nickel hydrogen battery is installed, and a second battery pack 3b shown in FIG. 5 in which a cell 4b made of a lithium ion battery is installed. Two types of battery packs can be charged, and a rechargeable battery set is constituted by the charging device 1 and at least one of the first battery pack 3a and the second battery pack 3b charged by the charging device 1. . As the rechargeable battery set, any of the rechargeable battery set 1 and the first battery pack 3a, the charging device 1 and the second battery pack 3b, or the combination of the charging device 1, the first battery pack 3a and the second battery pack 3b. It may be.

  As the power tool 2 to which the first battery pack 3 or the second battery pack 3b is attached, for example, a pistol type power tool 2 similar to the power tool shown in FIG. Omitted. The power tool 2 can use only one of the first battery pack 3a and the second battery pack 3b as a power source, that is, the power tool 2 is shown in FIG. 8 to which the first battery pack 3a is attached. It is assumed that there are two types of electric tool 2 and an electric tool (not shown) to which the second battery pack 3b is attached.

  Both battery packs 3a and 3b that are removed from the electric tool 2 and charged to the charging device 1 are different not only in type but also in shape and size.

  The first battery pack 3a shown in FIG. 4 is configured by a block-shaped first case 11, and a cell 4a (see FIG. 6) is internally provided in the first case. The first fitting portion 12 having an asymmetric outer peripheral shape is vertically directed downward from the center of the portion of the first case 11 on the lower surface, which is the surface attached to the electric tool 2, that is biased toward one side (one end side). Protruding. An electrode 13 is provided on the outer peripheral surface of the protruding end portion of the first fitting portion 12, and a first connection terminal 14 (see FIG. 3) is provided in the same portion. Further, a rectangular base portion 15 that is shorter than the first insertion portion 12 protrudes downward from the center of the lower surface of the first case 11 so as to surround three sides of the base end portion of the first insertion portion 12. Forming. Then, by attaching the first fitting portion 12 and the base portion 15 to the battery pack attachment portion 9 of the electric tool 2 detachably, the electrode 13 of the first battery pack 3a is connected to a terminal (not shown) provided on the battery pack attachment portion 9. It is connected and can supply electric power to the electric power tool 2.

  Further, a first vent hole that communicates with the cell 4a in the first case 11 between the first fitting portion 12 on the lower surface of the base portion 15 of the first case 11 and the side opposite to the first fitting portion 12. 17 is formed, and the first vent hole 17 is composed of a plurality of slits 17 a parallel to one side of the first case 11 on the first fitting portion 12 side.

  The second battery pack 3b shown in FIG. 5 has a box-shaped second case 18 that is flat and long in one direction with respect to the first battery pack 3a, and the second case 18 includes a cell 3b. ing. A second fitting portion 19 is formed so as to protrude downward from a portion of the lower surface of the second case 18 on the side attached to the power tool 2 except for one end portion in the longitudinal direction. The two insertion portions 19 are formed in a rectangular shape that is long in the longitudinal direction of the second case 18. Terminal insertion grooves 21 that open downward and on one side in the longitudinal direction of the second case 18 are formed at one end of the second fitting portion 19 in the longitudinal direction of the second case 18. An electrode 23 connected to the cell 3 b is provided in the inner part of the groove 21. From the both side surfaces of the second fitting portion 19, an engagement portion 22 having an inverted L-shape in side view is integrally projected toward the outer side, and in this example, the engagement portions 22 that are paired on the left and right are second fitted. A plurality of sets (specifically, 3 sets) are provided in the longitudinal direction of the insertion portion 19. Note that the upper ends of the vertical piece portions 22 a of the respective engaging portions 22 are integrally continuous with the lower surface of the second case 18. And by attaching the 2nd fitting part 19 and each engagement part 22 to the battery pack attachment part of an electric tool detachably, the electrode 23 is connected to the terminal which is not shown in the battery pack attachment part, and is used for an electric tool. Electric power can be supplied.

  Further, a recess 24 is formed at the center of the lower surface of the second fitting portion 19. A battery side connector portion 25 protrudes downward from an end portion of the bottom portion of the recess 24 opposite to the one side in the longitudinal direction of the second case 18, and the battery side connector portion 25 has a second connection terminal. 26 (see FIG. 3). A portion between one side in the longitudinal direction on the lower surface of the second case 18 and the second fitting portion 19 (that is, an end on one side in the longitudinal direction) communicates with the cell 4b in the second case 18. Two vents 28 are formed, and the second vent 28 is composed of a plurality of slits 28 a that are long in the short direction of the first case 11.

  The charging device 1 shown in FIG. 1 has a box-shaped housing 32 that is rectangular in plan view and forms an outer shell. The first insertion portion 30 in which the first insertion portion 12 of the first battery pack 3a can be detachably fitted in the half portion on the short side of the upper surface of the housing 32 and the second portion of the second battery pack 3b. The 2nd insertion part 31 which can detachably insert the two insertion parts 19 is formed. The first insertion part 30 is formed on one end side in the longitudinal direction of the housing 32, and the second insertion part 31 is separated from the first insertion part 30 on the other end side in the longitudinal direction of the housing 32. Formed in position. In addition, the display part which displays the operation part which switches a charging mode, etc. in the half part on the opposite side to the side provided with the 1st to-be-inserted part 30 and the 2nd to-be-inserted part 31 of the upper surface of the housing 32 Is formed.

  An air outlet 36 is provided in an intermediate portion 35 formed of a portion between the first insertion portion 30 and the second insertion portion 31 on the upper surface portion of the housing 32, and the air outlet 36 is short of the housing 32. It is composed of a plurality of slits 36a that are long in the hand direction. The air outlet 36 is connected to a suction port 38 formed in the housing 32 through an air flow path 37 formed in the housing 32. The suction port 38 is formed on the bottom surface portion of the housing 32 disposed above the mounting surface via the leg portion 34. As shown in FIG. 6 and the like, a cooling fan 39 is provided at a position facing the air outlet 36 in the housing 32, and external air is sucked into the housing 32 from the suction port 38 by operating the fan 39. Thus, the air can be blown upward from the blower outlet 36.

  The first fitting portion 30 shown in FIG. 1 of the charging device 1 is composed of a concave portion that is open only at the top and has a planar shape that matches the first fitting portion 12 of the first battery pack 3a. A first charging terminal 41 is provided at a position corresponding to the electrode 13 of the first battery pack 3a on the inner surface of the first fitting portion 30, and a first charging terminal 41 is provided at a position corresponding to the first connection terminal 14 of the same portion. A connected terminal 42 (see FIG. 3) is provided.

  Here, as shown in FIG. 6, in a state where the first fitting portion 12 of the first battery pack 3a is fitted into the first fitting portion 30 of the charging apparatus 1, the first battery pack 3a is first connected to the electrode 13 of the first battery pack 3a. The charging terminal 41 is electrically connected and charged, and at the same time, the first connection terminal 14 of the first battery pack 3a contacts the first connected terminal 42 and is electrically connected.

  Further, in a state where the first fitting portion 12 is fitted into the first fitting portion 30 and the first battery pack 3a is disposed at the charging position, a part of the first case 11 of the first battery pack 3a is a charging device. The first vent 17 of the pedestal 15 overlaps the air outlet 36 of the intermediate portion 35 and overlaps in plan view at the same time. Accordingly, when the first battery pack 3a is charged, the air blown from the fan 39 blown from the air outlet 36 of the charging device 1 flows into the first case 11 of the first battery pack 3a through the first air vent 17. This wind can directly cool the interior parts such as the cells 4a in the first battery pack 3a, and can prevent the first battery pack 3a from becoming high temperature during charging.

  Moreover, the 2nd insertion part 31 shown in FIG. 1 consists of a recessed part opened toward the upper side and the opposite side to the 1st insertion part 30. FIG. The second charging terminal 43 protrudes upward from the end of the second fitted portion 31 on the first fitted portion 30 side at the bottom. In addition, engaged portions 44 are provided at positions corresponding to the respective engaging portions 22 of the second battery pack 3 b in the second fitted portion 31. As shown in FIG. 2, the engaged portion 44 projects the engaged portion 44 inward from the upper part of the inner surface on both sides of the second fitted portion 31, and below the engaged portion 44 is the second A gap 45 is formed in which the lateral piece 22b of the inverted L-shaped engaging portion 22 of the battery pack 3b is inserted. Further, a device-side connector portion 46 protrudes from the central portion of the bottom portion of the second fitting portion 31, and the device-side connector portion 46 is provided with a second connected terminal 47 (see FIG. 3).

  Further, as shown in FIG. 1 and the like, a moving plate 49 is disposed on the bottom of the second fitting portion 31 via a spring 48. Notches 50 and holes 51 are formed in the corresponding portions above the second charging terminal 43, each engaged portion 44, and the device-side connector portion 46 of the moving plate 49 so that the moving plate 49 can pass therethrough. From the unused state arranged at the upper part of the second fitted part 31 as shown in FIGS. 1 and 2, the second fitted part is arranged at the lower part of the second fitted part 31 as shown in FIG. The inside of the second fitting portion 19 can be moved up and down to the fitting state close to the bottom portion of 31. Further, in a state where the second fitting portion 19 of the second battery pack 3b is not fitted in the second fitting portion 31, the movable plate 49 is positioned in the unused state by the spring 48 as shown in FIGS. In this case, all or most of the second charging terminal 43, each engaged portion 44, and the device-side connector portion 46 can be disposed below the upper surface of the moving plate 49.

  In the state where the second fitting portion 19 of the second battery pack 3b is fitted into the second fitting portion 31 as shown in FIG. 7, the second charging terminal 43 is electrically connected to the electrode 23 of the second battery pack 3b. The second connection terminal 26 of the second battery pack 3b is in contact with and electrically connected to the second connected terminal 47 at the same time.

  When the second fitting portion 19 of the second battery pack 3b is fitted into the second fitting portion 31 of the charging device 1, the second fitting portion 19 of the second battery pack 3b is first placed on the upper surface of the moving plate 49. In the applied state, the second battery pack 3b is moved downward together with the moving plate 49 to substantially the same level as the fitted state against the spring 48, whereby each engaging portion 22 of the second battery pack 3b is moved. The clearance gap formed in the 1st to-be-inserted part 30 side of each to-be-engaged part 44 is allowed to pass. Then, after that, the second battery pack 3b is slid toward the first insertion portion 30 side, and the engagement portions 22 of the second battery pack 3b are moved to the gaps 45 below the engagement portions 44 of the charging device 1. Then, each engaging portion 22 and each engaged portion 44 are locked. When the second battery pack 3b is slid in this way, the second charging terminal 43 of the charging device 1 is inserted into the terminal insertion groove 21 of the second battery pack 3b, and the second charging terminal 43 is connected to the electrode 23. At the same time, the battery-side connector portion 25 of the second battery pack 3b is mechanically connected to the device-side connector portion 46 of the charging device 1, and at the same time, the second connection terminal 26 is electrically connected to the second connected terminal 47. Connected.

  Furthermore, in a state where the second fitting portion 19 is fitted into the second fitting portion 31 and the second battery pack 3b is arranged at the charging position, a part of the second case 18 of the second battery pack 3b is a charging device. The second ventilation port 28 of the second case 18 faces the air outlet 36 of the intermediate part 35 and overlaps in plan view at the same time. That is, in the state where the first battery pack 3a and the second battery pack 3b are fitted into the first fitting portion 30 and the second fitting portion 31, respectively, and each is placed at the charging position, The overlapping part 54 that constitutes a part and the overlapping part 55 that constitutes a part of the second battery pack 3 b overlap each other at a position facing the air outlet 36. Therefore, when the second battery pack 3b is charged, the air blown from the fan 39 blown from the outlet 36 of the charging device 1 is supplied to the second battery pack 3b through the second vent 28 formed in the overlapping portion 55. The air flows into the case 18, and this wind can cool the interior parts such as the cells 4b in the second battery pack 3b, thereby preventing the second battery pack 3b from becoming high temperature during charging. In this case, in the state where the first battery pack 3a and the second battery pack 3b are fitted into the first fitted portion 30 and the second fitted portion 31, respectively, and each is disposed at the charging position, Since the overlapping part 54 of the pack 3a and the overlapping part 55 of the second battery pack 3b overlap, it is possible to prevent both the first battery pack 3a and the second battery pack 3b from being attached and charged to the charging device 1 at the same time.

  Here, when the electrode 13 of the first battery pack 3 a is connected to the first charging terminal 41, the charging device 1 supplies power to the first charging terminal 41 side, and the second charging terminal 43 receives the second battery pack. When the 3b electrode 23 is connected, switching means for supplying power to the second charging terminal 43 side is provided, and the switching means will be described in detail below.

  As shown in the block diagram of FIG. 3, the charging device 1 includes a power supply circuit 56 that is connected to an external power supply (not shown) as a charging power supply and generates charging power. A common terminal 57 a of the switching relay 57 is connected to the power circuit 56. The normally closed terminal 57b (terminal connected in a demagnetized state) of the switching relay 57 is connected to the first charging terminal 41 to which the electrode 13 of the first battery pack 3a is connected. The terminal 57c (terminal cut in a demagnetized state) is connected to the second charging terminal 43 to which the electrode 23 of the second battery pack 3b is connected. Further, the charging device 1 is provided with a charge control circuit 58, and the first connection terminal 42 to which the first connection terminal 14 of the first battery pack 3a is connected and the second connection terminal 26 of the second battery pack 3b. Each of the second connected terminals 47 to which is connected is connected to the charge control circuit 58.

  When the first connection terminal 14 of the first battery pack 3a is connected to the first connected terminal 42, the charge control circuit 58 constituting the control means switches the switching relay 57 to the normal close terminal 57b side, When the second connection terminal 26 of the second battery pack 3b is connected to the second connected terminal 47, the switching relay 57 is set to be switched to the normal open terminal 57b side, whereby the first charging terminal 41, when the electrode 13 of the first battery pack 3a is connected, the switching relay 57 is switched to the normally closed terminal 57b side, and when the electrode 23 of the second battery pack 3b is connected to the second charging terminal 43. The switching relay 57 can be switched to the normally open terminal 57c side. Therefore, when the 1st insertion part 12 of the 1st battery pack 3a is inserted in the 1st insertion part 30 of the charging device 1, the 1st battery pack 3a can be charged, When the second insertion part 19 of the second battery pack 3b is fitted, the second battery pack 3b can be charged.

  Thus, in this invention, the 1st battery pack 3a and the 2nd battery pack 3b from which a kind differs can be charged with the one charging device 1. FIG. Moreover, since the charging device 1 can automatically switch the supply of power from one charging power source to either the first charging terminal 41 side or the second charging terminal 43 side by the switching relay 57, the first charging terminal The charging power source for 41 and the second charging terminal 43 can be used together, and the charging device 1 can be downsized. Further, the first battery pack 3a fitted into the first fitting portion 30 and the second battery pack 3b fitted into the second fitting portion 31 can be cooled by one fan 39, and the fan 39 can be used together. However, downsizing of the charging device 1 can be realized.

It is a perspective view of the charging device which shows an example of embodiment of this invention. It is sectional drawing of a charging device same as the above. It is a block diagram of a charging device same as the above. It is the perspective view seen from the lower surface side of the 1st battery pack. It is the perspective view seen from the lower surface side of the 2nd battery pack. It is a sectional side view which shows the state which mounted | wore the charging device same as the above with the 1st battery pack. It is a sectional side view which shows the state which mounted | wore the charging device same as the above with the 2nd battery pack. It is a side view of the conventional electric tool. The rechargeable battery set is shown, wherein (a) is a perspective view of the battery pack, and (b) is a perspective view of the charging device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Charger 3a 1st battery pack 3b 2nd battery pack 18 Housing 30 1st insertion part 31 2nd insertion part 36 Outlet 39 Fan 54 Overlapping part 55 Overlapping part

Claims (2)

  Forming a first fitting portion capable of fitting the first battery pack on the outer surface of the housing and a second fitting portion capable of fitting a second battery pack of a different type from the first battery pack; The first battery pack and the second battery pack are fitted between the first fitted portion and the second fitted portion, and the first fitted portion and the second fitted portion are respectively fitted in the charging position. The overlapping part or the second insertion part of the first battery pack that is formed in the first insertion part in the housing is formed at the position where the overlapping part, which is the overlapping part in the arranged state, faces. A charging device comprising: a cooling fan for sending air from the air outlet to an overlapping part of the second battery pack fitted in the part.   A rechargeable battery set comprising the charging device according to claim 1 and at least one of a first battery pack and a second battery pack, wherein the battery pack is disposed on an outer surface portion of an overlapping portion of the battery pack. A rechargeable battery set, wherein a vent hole communicating with the inside of the battery pack is formed at a position facing the air outlet in a state of being fitted into the first fitted portion or the second fitted portion.

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