Charging system, charging device, battery pack, and power tool

Abstract

To provide a charging system capable of reducing time and labor when charging a battery pack, a charging device, a battery pack, and a power tool.SOLUTION: A charging system 1 includes: a battery pack 40 for supplying power to a drive circuit 23 of a power tool 20; and a charging unit 50. The charging unit 50 is capable of receiving power supply from an external power source 2 and supplying charging current to the battery pack 40. The battery pack 40 includes an all-solid-state battery 41. The charging unit 50 includes a second power supply member 200 capable of coming into contact with a first power supply member 100 electrically connected to the battery pack 40. In a state where the power tool 20 is attached to the battery pack 40, and the first power supply member 100 and the second power supply member 200 are in contact with each other, a charging circuit 60 supplies charging current to the battery pack 40 via the second power supply member 200 and the first power supply member 100.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a charging system, a charging device, a battery pack, and a power tool. More specifically, the present disclosure relates to a charging system, a charging device, a battery pack, and a power tool that charge a battery pack that is a power source for the power tool. [Background technology]

[0002] Patent Document 1 discloses a charging system for an electric power tool.

[0003] The power tool includes a tool body and a battery pack that is detachable from the tool body. The power tool rotates an electric motor with power supplied from the battery pack to perform a task such as screw tightening.

[0004] The charging system includes a charger main body. When the battery pack is removed from the power tool and attached to the charger main body, the charger main body charges the battery pack. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2021-115691 A Summary of the Invention [Problem to be solved by the invention]

[0006] In the charging system described in Patent Document 1, the battery pack is removed from the power tool body and attached to the charger body, and the battery pack is charged. Then, when charging of the battery pack is completed, the battery pack is removed from the charger body and attached to the power tool body, and the work using the power tool is performed. Thus, when charging the battery pack of the power tool, there is a problem in that it is time-consuming to attach and detach the battery pack to and from the power tool body.

[0007] An object of the present disclosure is to provide a charging system, a charging device, a battery pack, and a power tool that can reduce the effort required when charging a battery pack. [Means for solving the problem]

[0008] A charging system according to an embodiment of the present disclosure includes a battery pack and a charging device. The battery pack is capable of supplying power to a drive circuit of an electric power tool having a motor and a drive circuit for driving the motor. The charging device has a charging circuit capable of receiving power from an external power source and supplying a charging current to the battery pack. The battery pack includes an all-solid-state battery. The charging device has a second power supply member capable of contacting a first power supply member electrically connected to the battery pack. When the electric power tool is attached to the battery pack and the first power supply member and the second power supply member are in contact with each other, the charging circuit supplies a charging current to the battery pack via the second power supply member and the first power supply member.

[0009] A charging device according to one aspect of the present disclosure is a charging device included in the charging system.

[0010] A battery pack according to one aspect of the present disclosure is a battery pack included in the charging system.

[0011] An electric power tool according to one aspect of the present disclosure is an electric power tool to which a battery pack provided in the charging system is attached. Effect of the Invention

[0012] According to the present disclosure, it is possible to reduce the effort required for charging a battery pack. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a schematic block diagram of a charging system according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is an external perspective view of a power tool to which a battery pack provided in the charging system is attached. [Diagram 3] FIG. 3 is an external perspective view of a charging device included in the charging system. [Figure 4] FIG. 4 is an external perspective view of a work platform equipped with the charging device. [Diagram 5] FIG. 5 is an external perspective view of the charging device according to the first embodiment, showing a state in which an electric tool is held in the charging device. [Figure 6] FIG. 6 is an external perspective view of two of the charging devices arranged side by side. [Figure 7] FIG. 7 is a partial cross-sectional view of the charging device of the first modification in a state before the power tool is held by the charging device. [Figure 8] FIG. 8 is a partial cross-sectional view of the charging device of the first modification example in a state where the power tool is held by the charging device. [Figure 9] FIG. 9 is a perspective view of the external appearance of the electric power tool according to the second modification. [Figure 10] FIG. 10 is a side view, with a part cut away, of the electric power tool of the second modification example held by the charging device. [Figure 11] FIG. 11 is a perspective view of the external appearance of the electric power tool according to the third modification. [Figure 12] FIG. 12 is an external perspective view of a charging device according to the third modification. [Figure 13] FIG. 13 is an explanatory diagram of a state in which the power tool is being held by the charging device of the third modification. [Figure 14] FIG. 14 is an external perspective view of the electric power tool and the charging device according to the fourth modification. [Figure 15] FIG. 15 is an external perspective view of the electric power tool and the charging device according to the fifth modification. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, a charging system, a charging device, a battery pack, and a power tool according to the embodiments will be described in detail with reference to the drawings. However, each figure described in the following embodiments is a schematic diagram, and the dimensional ratio of the size of each component does not necessarily reflect the actual dimensional ratio. In addition, the configuration described in the following embodiments is merely an example of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0015] (Embodiment) (1) Overview The charging system 1 of this embodiment includes a battery pack 40 and a charging device 50, as shown in FIG.

[0016] The battery pack 40 is capable of supplying power to a drive circuit 23 of the power tool 20. The power tool 20 includes a motor 22 and a drive circuit 23 that drives the motor 22.

[0017] The charging device 50 includes a charging circuit 60 that is capable of receiving power from an external power source 2 and supplying a charging current to the battery pack 40 .

[0018] The battery pack 40 includes an all-solid-state battery 41 .

[0019] The charging device 50 includes a second power supply member 200 that is contactable with a first power supply member 100 that is electrically connected to the battery pack 40 .

[0020] When the battery pack 40 is attached to the power tool 20 and the first power supply member 100 and the second power supply member 200 are in contact with each other, the charging circuit 60 supplies a charging current to the battery pack 40 via the second power supply member 200 and the first power supply member 100.

[0021] The battery pack 40 is composed of secondary batteries including an all-solid-state battery 41. The all-solid-state battery 41 is a battery in which a solid electrolyte is responsible for the conduction of ions between the anode and cathode, and has a charging speed several tens of times faster than that of a liquid battery.

[0022] In the charging system 1 of the present embodiment, when the first power supply member 100 and the second power supply member 200 are brought into contact with each other while the battery pack 40 is attached to the power tool 20 during a rest period between tasks using the power tool 20, the charging device 50 can charge the battery pack 40. Therefore, in the charging system 1 of the present embodiment, the battery pack 40 attached to the power tool 20 can be charged each time during a rest period between tasks using the power tool 20, so that the battery capacity of the battery pack 40 can be reduced and the weight of the battery pack 40 can be reduced. Furthermore, since the battery pack 40 can be charged while the battery pack 40 is attached to the power tool 20, it is not necessary to remove the battery pack 40 from the power tool 20 in order to charge the battery pack 40. Therefore, there is an advantage that there is no need to remove the battery pack 40 from the power tool 20 when charging the battery pack 40, and the effort required to charge the battery pack 40 can be reduced.

[0023] The charging device 50 according to this embodiment is the charging device 50 included in the charging system 1 described above.

[0024] The battery pack 40 according to this embodiment is the battery pack 40 included in the charging system 1 described above.

[0025] The power tool 20 according to this embodiment is a power tool 20 to which the battery pack 40 included in the charging system 1 described above is attached.

[0026] (2)Details Hereinafter, the charging system 1 according to the embodiment will be described in detail with reference to the drawings.

[0027] The charging system 1 of the present embodiment is used, for example, to charge a battery pack 40 of a power tool 20 used in a production line such as an automobile assembly plant.

[0028] The charging system 1 includes a battery pack 40 and a charging device 50. The power tool 20 to which the battery pack 40 is attached and the charging device 50 will be described below.

[0029] (2.1) Power tools A power tool 20 according to the present embodiment will be described with reference to FIGS.

[0030] As described above, the power tool 20 includes the motor 22, the drive circuit 23, and the battery pack 40. The power tool 20 also includes an operation unit 24 and a control unit 21. The power tool 20 also includes a tool body 30 (see FIG. 2) that houses the motor 22, the drive circuit 23, the operation unit 24, the control unit 21, etc.

[0031] The power tool 20 is, for example, a portable tool such as a drill driver that can be held by a user (operator) in one hand.

[0032] The tool body 30 of the power tool 20 has a cylindrical body 31, a grip 32, and a mounting part 33. The X-axis direction along the axial direction of the cylindrical body 31 and the longitudinal direction of the mounting part 33 is defined as the front-rear direction, the Y-axis direction along the lateral direction of the mounting part 33 is defined as the left-right direction, and the Z-axis direction is defined as the up-down direction. Furthermore, the positive direction in the X-axis direction is defined as the front side, the positive direction in the Y-axis direction is defined as the right side, and the positive direction in the Z-axis direction is defined as the top side. However, these directions are merely examples and are not intended to limit the directions of the power tool 20 and the charging device 50 when in use. Also, the arrows indicating the respective directions in the drawings are merely indicated for the purpose of explanation and do not have any substance.

[0033] The body 31 accommodates at least the motor 22. The body 31 also accommodates a transmission mechanism that transmits the rotation torque of the motor 22 to the output shaft 34. The output shaft 34 is exposed from the front end face of the body 31. As shown in FIG. 2, a mounting portion 35 is attached to the front end of the output shaft 34. A tip tool 36 such as a driver bit is attached to the mounting portion 35. That is, the tip tool 36 is attached to the output shaft 34 via the mounting portion 35. When the output shaft 34 rotates in response to the rotation of the motor 22, the tip tool 36 attached to the output shaft 34 via the mounting portion 35 rotates. When the tip tool 36, which is a driver bit, is attached to the mounting portion 35, the tip tool 36 rotates while being set on a fastening part (e.g., a bolt or a screw), thereby enabling an operation such as tightening or loosening the fastening part with respect to a mating member.

[0034] The grip portion 32 protrudes downward from the body portion 31. The grip portion 32 is a portion that is held by a user of the power tool 20. The user of the power tool 20 holds the grip portion 32 to perform work using the power tool 20. The grip portion 32 also houses the control unit 21 and the like therein.

[0035] The attachment part 33 is provided at the tip (lower end) of the grip part 32. In other words, the body part 31 and the attachment part 33 are connected by the grip part 32. The attachment part 33 has a rectangular shape when viewed from above, and is configured so that the battery pack 40 can be attached and detached to the bottom surface of the attachment part 33.

[0036] The grip portion 32 is provided with an operation unit 24 for adjusting the amount of rotation of the output shaft 34. The operation unit 24 includes, for example, a trigger switch having an operation button arranged on the grip portion 32. When the user performs an operation to pull in the operation button arranged on the grip portion 32, the trigger switch outputs an operation signal to the control unit 21, the signal having a magnitude corresponding to the amount the operation button is pulled in.

[0037] A rechargeable battery pack 40 is removably attached to the mounting portion 33. The power tool 20 of this embodiment operates using the battery pack 40 as a power source. The battery pack 40 includes a flat rectangular case 42 made of a material such as synthetic resin. An all-solid-state battery 41, in which a solid electrolyte is responsible for ion conduction between an anode and a cathode, is housed inside the case 42. An attachment structure is provided on the upper surface of the case 42 to allow the case 42 to be detachably attached to the lower surface of the mounting portion 33. In addition, a plurality of terminals are arranged on the upper surface of the case 42, including an anode terminal connected to the anode of the all-solid-state battery 41 and a cathode terminal connected to the cathode of the all-solid-state battery 41. When the battery pack 40 is attached to the lower surface of the mounting portion 33, the plurality of terminals arranged on the upper surface of the case 42 are electrically connected to the plurality of terminals arranged on the lower surface of the mounting portion 33, and the battery pack 40 is capable of supplying power to the control unit 21, the drive circuit 23, and the like.

[0038] The control unit 21 includes, for example, a computer system having one or more processors and a memory. At least a part of the functions of the control unit 21 is realized by the processor of the computer system executing a program recorded in the memory of the computer system. The program may be recorded in the memory, or may be provided via a telecommunication line such as the Internet, or may be recorded on a non-transitory recording medium such as a memory card and provided.

[0039] The control unit 21 controls the drive circuit 23 in response to an operation signal input from the operation unit 24, for example, to rotate the motor 22 at a desired rotation speed and rotate the tool tip 36 at a rotation speed corresponding to the rotation speed of the motor 22. The power tool 20 may be equipped with a torque sensor that detects the torque applied to the output shaft 34, and the control unit 21 may control the rotation of the motor 22 based on the detection result of the torque sensor.

[0040] The power tool 20 also includes a first power supply member 100 electrically connected to the battery pack 40. In this embodiment, the first power supply member 100 includes a pair of plug-in terminals 101 provided on the battery pack 40. The case 42 is provided with a pair of through holes 43 at corners on the lower front side of the case 42, and the pair of plug-in terminals 101 are exposed from the pair of through holes 43. Each of the pair of plug-in terminals 101 is formed in an inverted U shape when viewed from the front. The plug-in terminals 101 are electrically connected to the second power supply member 200 by sandwiching the second power supply member 200 inserted into the through holes 43 from both sides.

[0041] (2.2) Charging device A charging device 50 of the present embodiment will be described with reference to FIG. 1 and FIG. 3 to FIG.

[0042] The charging device 50 includes the charging circuit 60 and the second power supply member 200 as described above.

[0043] In this embodiment, as shown in Figures 4 and 5, the mounting portion 33 of the power tool 20 with the battery pack 40 attached and the front portion of the battery pack 40 are inserted into the storage recess 53, and the output shaft 34 of the power tool 20 is placed on the support base 52.

[0044] The charging circuit 60 is connected to an external power source 2, such as a portable power source that outputs a DC voltage, via a power cable CB1. The charging circuit 60 receives power from the external power source 2 via the power cable CB1 and passes a charging current to the battery pack 40. The charging circuit 60 charges the all-solid-state battery 41 of the battery pack 40 by passing a charging current to the battery pack 40 via the second power supply member 200 and the first power supply member 100.

[0045] The external power source 2 may be an AC power source such as a commercial AC power source (AC 100V / 200V, 50Hz / 60Hz AC power source). In this case, the charging circuit 60 may include an AC / DC conversion circuit that converts the AC voltage supplied from the external power source 2, which is a commercial AC power source, into a DC voltage and supplies a charging current to the battery pack 40.

[0046] The charging device 50 has a housing 51 made of, for example, an insulating synthetic resin material. The charging device 50 houses a charging circuit 60 and the like. The housing 51 is formed in a rectangular parallelepiped shape with a front-rear dimension greater than a left-right dimension and a top-bottom dimension.

[0047] A columnar support base 52 protrudes upward from a front portion of an upper surface 511 of the housing 51. The support base 52 supports a front end portion of the body 31 of the power tool 20. An inclined surface 521 that comes into contact with the front end surface of the body 31 is provided on the upper portion of the support base 52. A semicircular recess 522 is provided on the upper end surface of the support base 52, and the output shaft 34 of the power tool 20 is placed on the recess 522.

[0048] A rectangular hole-shaped storage recess 53 is provided on the top surface 511 of the housing 51 at a position rearward of the support stand 52. That is, the charging device 50 has the housing 51 that houses the charging circuit 60, and the storage recess 53 is provided on one surface of the housing 51. The housing 51 supports (holds) the power tool 20 to which the battery pack 40 is attached with at least a part of the battery pack 40 inserted in the storage recess 53.

[0049] The right and left side walls 512 of the housing 51 are provided with grooves 514 extending along the X-axis direction from the rear side wall of the housing 51 to the vicinity of the front end of the storage recess 53. A plurality of slit-shaped through holes 515 connected to the storage recess 53 are provided on the bottom surface of each of the left and right grooves 514. Note that in this embodiment, a plurality of through holes 515 are provided in each of the left and right grooves 514, but the number, size, and shape of the through holes 515 can be changed as appropriate, and it is sufficient that at least one through hole 515 is provided. In this embodiment, a plurality of through holes 515 are provided in each of the left and right grooves 514, but one or more through holes 515 may be provided in only one of the left and right grooves 514. In other words, it is sufficient that one or more through holes 515 connected to the storage recess 53 are provided in the side walls 512 surrounding the storage recess 53 in the housing 51.

[0050] Further, in each of the left and right side walls 512, a protruding portion 516 protruding outward is provided in the edge region of the groove 514. Here, the protruding portion 516 protruding outward means that the protruding portion 516 protrudes in the opposite direction to the storage recess 53 with respect to the bottom surface of the groove 514. In this embodiment, the groove 514 is provided in the vicinity of the center in the up-down direction in each of the left and right side walls 512. Therefore, in each of the left and right side walls 512, the edge region of the groove 514, that is, the upper region of the groove 514 and the lower region of the groove 514, are provided with the protruding portion 516 protruding outward. That is, the groove 514 is provided in the side wall 512 of the housing 51, and one or more through holes 515 are provided in the bottom surface of the groove 514. In the side wall 512 of the housing 51, the edge region of the groove 514 is provided with the protruding portion 516 protruding outward.

[0051] A pair of conductive bars 201 constituting the second power supply member 200 are disposed on the bottom surface of the storage recess 53. Each of the pair of conductive bars 201 is formed in a long plate shape from a metal material such as a copper alloy. The pair of conductive bars 201 are disposed side by side in the left-right direction so that the longitudinal direction is along the X-axis direction. The pair of conductive bars 201 are connected to a charging circuit 60, and a DC voltage is supplied from the charging circuit 60 to the pair of conductive bars 201. The distance between the pair of conductive bars 201 is set to the same dimension as the distance between a pair of plug-in terminals 101 provided on the power tool 20.

[0052] Further, a lamp cover 54 formed of, for example, a translucent synthetic resin material is attached to the rear of the upper surface 511 of the housing 51. An operation indicator lamp such as, for example, a light-emitting diode is housed inside the housing 51, and when the operation indicator lamp emits light, the light of the operation indicator lamp can be emitted to the outside of the housing 51 through the lamp cover 54. For example, the control unit 21 blinks the operation indicator lamp while the charging circuit 60 is charging the battery pack 40, and lights the operation indicator lamp when charging of the battery pack 40 is completed. Therefore, the user can check the charging state of the all-solid-state battery 41 by the charging device 50 based on the light of the operation indicator lamp emitted through the lamp cover 54.

[0053] The charging device 50 of this embodiment is attached to, for example, a work cart 300 (see FIG. 4) used in a production line. The work cart 300 has upper and lower two shelves 301, 302 each formed in a rectangular plate shape, four supports 303 connecting the shelves 301, 302, and four swivel wheels 304 attached to the lower surface of the lower shelf 301.

[0054] An external power source 2, such as a portable power source, is placed on the lower shelf 301. The external power source 2 and the charging device 50 are connected via, for example, a power cable CB1, and the charging device 50 receives a supply of power from the external power source 2 via the power cable CB1.

[0055] Two support pipes 305 for mounting the charging device 50 are fixed to the work platform 300. The two support pipes 305 are arranged so as to be parallel to each other. In this embodiment, "parallel" may include not only a state in which two straight lines on the same plane do not intersect, but also a state in which two straight lines intersect at an angle of several degrees from a parallel state. One end of each of the two support pipes 305 is fixed to the rear left support 303 via a triangular frame 306 made up of two pipes combined together. Similarly, the other end of each of the two support pipes 305 is fixed to the rear right support 303 via a triangular frame 306 made up of two pipes combined together.

[0056] Two clamp members 55 that respectively hold the two support pipes 305 are attached to the underside of the housing 51 of the charging device 50. Therefore, the housing 51 of the charging device 50 is fixed to the work cart 300 by holding the two support pipes 305 with the two clamp members 55 respectively. Note that, although two charging devices 50 are attached to the work cart 300 in the example of Fig. 4, the number of charging devices 50 fixed to the work cart 300 may be one, or three or more.

[0057] FIG. 6 shows a state in which two charging devices 50 are arranged side by side in the left-right direction. In FIG. 6, the work cart 300 is omitted for simplicity. The two charging devices 50 are arranged in a state in which the protrusions 516 provided on the two adjacent side walls 512 are butted against each other. At this time, the two protrusions 516 provided on the upper parts of the two adjacent side walls 512 are located above the two grooves 514 provided on the two adjacent side walls 512 of the two charging devices 50, and the two protrusions 516 close the gap between the two charging devices 50. Therefore, it is possible to reduce the possibility that dust or the like will enter the through holes 515 provided on the two adjacent side walls 512 from above the two charging devices 50 through the gap between the two charging devices 50.

[0058] When two charging devices 50 are arranged with the protrusions 516 provided on the two adjacent side walls 512 butted against each other, a space SP1 through which air passes is formed by the two grooves 514 provided on the two adjacent side walls 512. Therefore, when two charging devices 50 are attached to the work cart 300 side by side, air can be allowed to flow in and out of the storage recess 53 through the space SP1 formed between the two charging devices 50 and the through holes 515 provided in the grooves 514 of the two adjacent side walls 512. As a result, when the battery pack 40 and the charging circuit 60 generate heat during charging of the battery pack 40, the air in the storage recess 53 is replaced through the through holes 515, thereby lowering the temperatures of the battery pack 40 and the charging circuit 60.

[0059] (2.3) Operation Description The charging operation of the charging system 1 of this embodiment for charging the battery pack 40 attached to the power tool 20 will be described below.

[0060] In the charging system 1 of this embodiment, during a rest period between tasks using the power tool 20, when the user places the power tool 20 with the battery pack 40 attached on the charging device 50 (see Figures 4 and 5), the battery pack 40 is charged.

[0061] The power tool 20 is held by the charging device 50 with the mounting portion 33 and the front portion of the battery pack 40 inserted into the storage recess 53 of the housing 51 and the output shaft 34 placed on the recess 522 on the upper end surface of the support stand 52. When the mounting portion 33 and the front portion of the battery pack 40 are inserted into the storage recess 53, a pair of conductive bars 201 arranged on the bottom surface of the storage recess 53 are inserted into a pair of through holes 43 provided in the case 42 of the battery pack 40. Then, the plug-in terminals 101, which are second terminals arranged in each of the pair of through holes 43, sandwich the conductive bar 201, which is the first terminal inserted into the through hole 43, from both sides, so that the plug-in terminals 101 and the conductive bar 201 are electrically connected. As a result, a charging current flows from the charging circuit 60 to the battery pack 40 via the pair of conductive bars 201 and the pair of plug-in terminals 101, and the charging circuit 60 can charge the battery pack 40.

[0062] In this embodiment, the pair of conductive bars 201 constituting the second power supply member 200 are each formed in a long plate shape and are arranged at the bottom of the storage recess 53 so that their longitudinal directions are parallel to the X-axis direction. Therefore, even if the position of the battery pack 40 inserted into the storage recess 53 is slightly shifted in the X-axis direction when the power tool 20 is placed on the charging device 50, the pair of plug-in terminals 101 accommodated in the battery pack 40 can be reliably brought into contact with the pair of conductive bars 201. In other words, the pair of plug-in terminals 101 can be connected to any position of the pair of conductive bars 201, which has the advantage of increasing the degree of freedom in the position of the battery pack 40 inserted into the storage recess 53.

[0063] In addition, since the conductive bars 201 are inserted into each of the pair of plug-in terminals 101 due to the weight of the power tool 20, the user only needs to insert the mounting portion 33 of the power tool 20 and the front portion of the battery pack 40 into the storage recess 53 of the charging device 50, and there is an advantage that there is no need to press the power tool 20 against the charging device 50 in order to plug and connect the pair of conductive bars 201 to each of the pair of plug-in terminals 101.

[0064] In this embodiment, the second power supply member 200 provided in the charging device 50 is a pair of conductive bars 201 each formed in a long plate shape, but the shape and size of the second power supply member 200 can be changed as appropriate. The second power supply member 200 provided in the charging device 50 may be, for example, a pair of rod-shaped terminals connected to a pair of plug-in terminals 101 of the power tool 20.

[0065] In addition, in this embodiment, the first power supply member 100 includes the plug-in terminal 101 which is the second terminal, and the second power supply member 200 has a plate-shaped conductive bar 201 which is the first terminal, but a rod-shaped or plate-shaped first terminal may be provided on the battery pack 40, and a second terminal sandwiching the first terminal from both sides may be provided on the charging device 50.

[0066] That is, one of the first power supply member 100 and the second power supply member 200 may include a rod-shaped or plate-shaped first terminal, and the other of the first power supply member 100 and the second power supply member 200 may include second terminals that sandwich the first terminal from both sides. In this way, the first power supply member 100 and the second power supply member 200 can be reliably electrically connected to each other by the second terminals sandwiching the first terminal from both sides.

[0067] The charging device 50 may include a detection unit for detecting whether or not the battery pack 40 is inserted in the storage recess 53. When the detection unit detects that the battery pack 40 is inserted in the storage recess 53, the charging circuit 60 may supply a charging current to the battery pack 40, and when the battery pack 40 is not inserted in the storage recess 53, the output of the charging circuit 60 may be stopped. The detection unit may be, for example, a push button switch or the like in which the on / off of a contact is inverted when an operating element is pressed by the battery pack 40 inserted in the storage recess 53, or a proximity switch or the like that detects the approach of an object.

[0068] (3) Variations The above embodiment is merely one of various embodiments of the present disclosure. The above embodiment can be modified in various ways depending on the design and the like as long as the object of the present disclosure can be achieved.

[0069] Modifications of the above embodiment are listed below. The modifications described below can be combined as appropriate and applied. Hereinafter, the above embodiment may also be referred to as a basic configuration.

[0070] (3.1) Variation 1 The charging system 1 of the first modification will be described with reference to FIGS.

[0071] The charging system 1 of the first modification differs from the basic configuration in that a shutter mechanism 44 is provided to close the through-hole 43 of the battery pack 40 when the power tool 20 is removed from the charging device 50. Components common to the basic configuration are denoted by the same reference numerals and descriptions thereof will be omitted.

[0072] The shutter mechanism 44 includes a pair of door bodies 441 and a pair of coil springs 442 .

[0073] The pair of door bodies 441 are housed inside the case 42. The pair of door bodies 441 are arranged in a state in which they can slide along the inner surface of the case 42 between a closed position where their tips come into contact with each other to close the through-hole 43, and an open position where their tips are separated from each other to open the through-hole 43.

[0074] The pair of coil springs 442 are provided in one-to-one correspondence with the pair of door bodies 441. Each of the pair of coil springs 442 applies a spring force to the corresponding door body 441 in a direction that moves the corresponding door body 441 from the open position to the closed position.

[0075] 7, when the power tool 20 is removed from the charging device 50, each of the pair of doors 441 receives the spring force of the corresponding coil spring 442 and moves from the open position to the closed position, and the through hole 43 is blocked by the pair of doors 441. Since the through hole 43 is blocked by the pair of doors 441, the possibility that dust or the like will enter the case 42 through the through hole 43 can be reduced.

[0076] On the other hand, when the mounting portion 33 of the power tool 20 and the front portion of the battery pack 40 are inserted into the storage recess 53 of the charging device 50, the pair of conductive bars 201 arranged on the bottom surface of the storage recess 53 enter into the pair of through holes 43 provided in the case 42 of the battery pack 40. Then, the conductive bar 201 comes into contact with a pair of doors 441 provided in each of the pair of through holes 43, and when the battery pack 40 moves downward due to the weight of the power tool 20, the pair of doors 441 are pushed by the conductive bar 201 and move from the closed position to the open position. When the pair of doors 441 move to the open position, the conductive bar 201 enters the inside of the case 42 and is electrically connected to the plug-in terminal 101.

[0077] In this way, when the mounting portion 33 of the power tool 20 and the front portion of the battery pack 40 are inserted into the storage recess 53 of the charging device 50, a pair of door bodies 441 provided in each of the pair of through holes 43 are pushed by the conductive bar 201 and move from the closed position to the open position, so that no operation is required to open the pair of door bodies 441 and the battery pack 40 of the power tool 20 can be easily connected to the charging device 50.

[0078] (3.2) Variation 2 In a basic configuration, the first power supply member 100 included in the power tool 20 is a pair of plug-in terminals 101, but the shape and size of the first power supply member 100 can be changed as appropriate. In addition, the shape and size of the second power supply member 200 included in the charging device 50 can also be changed as appropriate to match the first power supply member 100.

[0079] The charging system 1 according to the second modification will be described with reference to Fig. 9 and Fig. 10. Note that components common to the basic configuration are given the same reference numerals, and descriptions thereof will be omitted.

[0080] The charging system 1 of the second modification includes a battery pack 40 provided in a power tool 20A and a charging device 50A.

[0081] In the charging system 1 of the second modified example, the first power supply member 100 included in the power tool 20A includes, for example, a pair of plate-shaped electrodes 102 arranged on the front surface of the case 42 as shown in FIG.

[0082] The second power supply member 200 included in the charging device 50A includes, for example, a pair of rod-shaped terminals 202 connectable to the pair of plate-shaped electrodes 102. The second power supply member 200 including the pair of rod-shaped terminals 202 is provided on the connection plug 56.

[0083] The charging device 50A includes a housing 51A made of, for example, a synthetic resin material. The housing 51A houses a charging circuit 60. The housing 51A has a storage recess 53A on the top surface thereof into which the mounting portion 33 of the power tool 20A and the front portion of the battery pack 40 are inserted. FIG. 10 is a partial cross-sectional view of the housing 51A of the charging device 50A seen from the left side. The cross-sectional shape of the storage recess 53A seen from the left side is a V-shape in which two inclined surfaces 531, 532 intersect at right angles. In this embodiment, "orthogonal" is not limited to a state in which two planes or a straight line and a plane intersect at an angle of 90 degrees, and the angle between the two planes or the angle between the straight line and a plane may deviate from 90 degrees by several degrees. When the battery pack 40 attached to the power tool 20 is charged by the charging device 50A, when the mounting portion 33 of the power tool 20A and the front portion of the battery pack 40 are inserted into the storage recess 53A of the charging device 50A, the lower surface of the battery pack 40 contacts the rear inclined surface 531, and the front surface of the battery pack 40 contacts the front inclined surface 532. In addition, the body portion 31 of the power tool 20A is supported by the support base 52.

[0084] Here, the inclined surface 532 with which the front surface of the battery pack 40 comes into contact is provided with a slot 533 extending in a direction perpendicular to the inclined surface 532 at a position facing the pair of plate-shaped electrodes 102. The connection plug 56 is arranged in the slot 533 so as to be movable in a direction perpendicular to the inclined surface 532. A magnet 561 is attached to the connection plug 56, and a magnetic member 420 to which the magnet 561 is attracted is arranged in the case 42 of the battery pack 40. Here, the magnet 561, the magnetic member 420, and the like realize a holding portion 560 that holds the first power supply member 100 and the second power supply member 200 in contact with each other by magnetic force. When the power tool 20A is pulled by an external force larger than the attraction force of the magnet 561, the connection plug 56 is detached from the battery pack 40, so that the power tool 20A can be easily removed. The holding portion is not limited to the magnet 561, and may be realized by an electromagnet or the like.

[0085] A user of the power tool 20A places the power tool 20A in the housing 51A of the charging device 50A between tasks using the power tool 20A. At this time, the power tool 20A is placed on the charging device 50A with the mounting portion 33 of the power tool 20A and the front portion of the battery pack 40 inserted into the storage recess 53A of the housing 51A and the output shaft 34 provided on the front end surface of the body portion 31 disposed in the recess 522 of the support base 52. When the mounting portion 33 of the power tool 20A and the front portion of the battery pack 40 are inserted into the storage recess 53A of the housing 51A, the magnet 561 of the connection plug 56 magnetically attracts the magnetic member 420 disposed in the case 42 of the battery pack 40, so that the connection plug 56 moves to a position where the pair of rod-shaped terminals 202 of the connection plug 56 contact the pair of plate-shaped electrodes 102 of the battery pack 40. At this time, the pair of rod-shaped terminals 202 of the connection plug 56 come into contact with the pair of plate-shaped electrodes 102 of the battery pack 40, whereby the charging circuit 60 of the charging device 50A is electrically connected to the battery pack 40, and the battery pack 40 is charged by the charging circuit 60. In addition, since the holding portion 560 magnetically holds the pair of rod-shaped terminals 202 and the pair of plate-shaped electrodes 102 in contact with each other, the first power supply member 100 including the pair of plate-shaped electrodes 102 and the second power supply member 200 including the pair of rod-shaped terminals 202 can be reliably electrically connected to each other.

[0086] When a user of the power tool 20A removes the power tool 20A from the charging device 50A to perform work using the power tool 20A, the movement range of the connection plug 56 is limited, so that the pair of rod-shaped terminals 202 of the connection plug 56 come off the pair of plate-shaped electrodes 102 of the battery pack 40. This allows the user to easily remove the power tool 20A from the charging device 50A and perform work using the power tool 20A.

[0087] In this way, when the user places the power tool 20A on the housing 51A of the charging device 50A between tasks using the power tool 20A, the charging device 50A charges the battery pack 40 each time. Therefore, since there is no need to remove the battery pack 40 from the power tool 20A when charging the battery pack 40, the effort required for charging the battery pack 40 can be reduced.

[0088] (3.3) Variation 3 A charging device 50B and a power tool 20B according to the third modification will be described with reference to Fig. 11 to Fig. 13. Components common to the basic configuration are given the same reference numerals and descriptions thereof will be omitted.

[0089] 12 and 13, the charging device 50B of the third modification has a holder-type housing 51B. The housing 51B is provided with a holder portion 58 into which the front portion of the body portion 31 of the power tool 20B is inserted, and holds the power tool 20B with the front portion of the body portion 31 inserted into the holder portion 58.

[0090] 11 , in the electric power tool 20B of the third modification, a pair of plate terminals 103 serving as the first power supply member 100 is provided on the front end surface of the body 31. The pair of plate terminals 103 are electrically connected to the anode terminal and the cathode terminal of the battery pack 40 attached to the attachment portion 33 via wiring provided inside the tool body 30.

[0091] The pair of plate terminals 103 are disposed on both sides of the output shaft 34, and protrude forward from the front end surface of the body portion 31. The thickness direction of the pair of plate terminals 103 is perpendicular to the central axis of the output shaft 34. In this manner, in the third modification, the first power supply member 100 is provided at a portion of the body portion 31 that is inserted into the holder portion 58.

[0092] Fig. 12 is an external perspective view of charging device 50B, and Fig. 13 is an explanatory diagram of a state in which charging device 50B is in the middle of holding power tool 20B. On top surface 511 of housing 51B of charging device 50B, there are provided placement stand 57 on which battery pack 40 attached to power tool 20B is placed, and holder 58 for holding body 31.

[0093] The mounting base 57 is formed in a trapezoidal shape in a side view. A side surface 571 of the mounting base 57 on the holder portion 58 side is inclined obliquely with respect to the upper surface 511 of the housing 51B. The side surface 571 of the mounting base 57 is provided with a groove 572 into which the battery pack 40 is inserted.

[0094] The holder 58 has a rectangular cylindrical columnar portion 581 that protrudes upward from the upper surface 511 of the housing 51B, and a protruding portion 582 that protrudes from the upper end of the columnar portion 581 toward the mounting base 57. The lower surface of the protruding portion 582 is recessed into a semi-cylindrical shape to provide a recess 583 into which the body portion 31 of the power tool 20 is inserted. The bottom of the recess 583 is provided with a through hole 584 into which the output shaft 34 of the power tool 20B is inserted.

[0095] The holder 58 is provided with a pair of plug-in terminals 203 to which the pair of plate terminals 103 of the power tool 20B can be connected when the body 31 is inserted into the recess 583. The holder 58 is provided with a pair of plug-in terminals 203 that serve as the second power supply member 200. Each of the pair of plug-in terminals 203 is formed in a substantially U-shape from an elastic conductive material. The pair of plug-in terminals 203 are provided in one-to-one correspondence with the pair of plate terminals 103. When the plate terminals 103 corresponding to each of the pair of plug-in terminals 203 are inserted, the plug-in terminals 203 and the plate terminals 103 are electrically connected to each other by sandwiching the plate terminals 103 from both sides. When each of the pair of plate terminals 103 is connected to the plug-in terminals 203, the charging circuit 60 of the charging device 50 is electrically connected to the all-solid-state battery 41 via the pair of plug-in terminals 203 and the pair of plate terminals 103, etc., and the all-solid-state battery 41 can be charged. Thus, in the third modification, the charging device 50B has a holder portion 58 capable of holding the body portion 31 when the body portion 31 is inserted, and the second power supply member 200 is disposed in the holder portion 58.

[0096] A lamp cover 54 made of, for example, a translucent synthetic resin material is attached to the upper surface of the protruding portion 582 of the holder portion 58. An operation indicator lamp such as a light-emitting diode is housed inside the holder portion 58. When the operation indicator lamp emits light, the light of the operation indicator lamp can be emitted to the outside of the holder portion 58 through the lamp cover 54.

[0097] When the user causes the charging device 50B to hold the power tool 20B, the user inserts the body 31 into the recess 583 of the holder 58, and the battery pack 40 into the groove 572 of the mounting base 57, and then inserts the power tool 20B obliquely downward from the rear of the charging device 50B. When the user pushes the power tool 20B toward the charging device 50B so that the body 31 is inserted all the way into the recess 583, the pair of plate terminals 103 of the power tool 20B are inserted into the pair of plug-in terminals 203 of the charging device 50B, respectively. As a result, the charging circuit 60 is electrically connected to the battery pack 40 via the pair of plug-in terminals 203 (the second power supply member 200) and the pair of plate terminals 103 (the first power supply member 100), and the battery pack 40 can be charged.

[0098] Therefore, when a user who performs work using the power tool 20B holds the power tool 20B on the charging device 50B during a rest period between works, the charging device 50B charges the battery pack 40 of the power tool 20B each time. Therefore, the battery pack 40 can be charged while the battery pack 40 is attached to the power tool 20B, and the effort required for charging the battery pack 40 can be reduced.

[0099] (3.4) Variation 4 A charging device 50C and a power tool 20C according to the fourth modification will be described with reference to Fig. 14. Note that components common to the basic configuration are given the same reference numerals and descriptions thereof will be omitted.

[0100] The charging device 50C of the fourth modification differs from the basic configuration in that it includes a plate portion 51C on which the power tool 20C is placed.

[0101] The plate portion 51C is formed in a disk shape from, for example, a synthetic resin material. That is, the charging device 50C has the plate portion 51C on which the battery pack 40 attached to the power tool 20C can be placed when the battery pack 40 is attached to the power tool 20C. The charging circuit 60 is accommodated inside the plate portion 51C. A cylindrical portion 59 protruding upward is provided at the center of the upper surface of the plate portion 51C. A pair of terminals that become the second power supply member 200 are arranged inside the cylindrical portion 59. That is, the second power supply member 200 is arranged at a portion of the plate portion 51C where the battery pack 40 attached to the power tool 20C is placed. A power cable CB2 connected to the charging circuit 60 is drawn out from the plate portion 51C, and a plug 61 for connecting to a power outlet is provided at one end of the power cable CB2. When the plug 61 is connected to, for example, a commercial AC power outlet, AC power is supplied from the commercial AC power source to the charging circuit 60. The charging circuit 60 converts the AC voltage input from a commercial AC power source into a DC voltage, and supplies a charging current to the battery pack 40 to charge the battery pack 40 .

[0102] The battery pack 40 attached to the power tool 20C has a bottom surface provided with a fitting hole into which the cylindrical portion 59 of the charging device 50C is inserted. A pair of terminals serving as the first power supply member 100 is disposed in the fitting hole on the bottom surface of the battery pack 40. That is, the first power supply member 100 is disposed at a portion of the battery pack 40 that is placed on the plate portion 51C.

[0103] When the charging device 50C holds the electric power tool 20C, the battery pack 40 is placed on the upper surface of the plate portion 51C such that the cylindrical portion 59 of the charging device 50C is inserted into a fitting hole on the lower surface of the battery pack 40. When the cylindrical portion 59 of the charging device 50C is inserted into the fitting hole of the battery pack 40, a pair of terminals arranged on the cylindrical portion 59 and a pair of terminals arranged in the fitting hole of the battery pack 40 are electrically connected. As a result, the charging circuit 60 is electrically connected to the battery pack 40 via the second power supply member 200 and the first power supply member 100, and the battery pack 40 is charged by the charging circuit 60.

[0104] Therefore, when a user who performs work using the power tool 20C holds the power tool 20C on the charging device 50C during a rest period between works, the charging device 50C charges the battery pack 40 of the power tool 20C each time. This allows the charging device 50C to charge the battery pack 40 while the battery pack 40 is attached to the power tool 20C, thereby reducing the effort required for charging the battery pack 40.

[0105] Although the plate portion 51C is formed in a disk shape, the shape of the plate portion 51C is not limited to a disk shape, and may be a flat rectangular parallelepiped shape.

[0106] (3.5) Variation 5 A charging device 50D and a power tool 20D according to the fifth modification will be described with reference to Fig. 15. Components common to the basic configuration are given the same reference numerals and descriptions thereof will be omitted.

[0107] The charging device 50D of the fifth modification is different from the basic configuration in that the charging device 50D includes a magnetic attachment plug 62 that is detachable from the plug connection portion 45 provided on the power tool 20D, and the power tool 20D and the charging device 50D are electrically connected by connecting the attachment plug 62 to the plug connection portion 45. Note that components common to the basic configuration are denoted by the same reference numerals, and descriptions thereof will be omitted.

[0108] A plug connection portion 45 is provided at the rear of the battery pack 40 attached to the power tool 20D. The plug connection portion 45 has a rectangular recess 451 into which the tip of the attachment plug 62 is inserted. A pair of rod-shaped terminals 104 that form the first power supply member 100 are provided in the recess 451. In other words, the first power supply member 100 is provided at the plug connection portion 45 to which the attachment plug 62 is detachably attached.

[0109] The charging device 50D includes a box-shaped housing 51D that houses a charging circuit 60 therein.

[0110] A power cable CB2 connected to an input end of the charging circuit 60 and an electric wire CB3 connected to an output end of the charging circuit 60 extend from the housing 51D.

[0111] A plug 61 that can be connected to, for example, a commercial AC power outlet is connected to one end of the power cable CB2. When the plug 61 is connected to the commercial AC power outlet, an AC voltage is input from the commercial AC power supply to the charging circuit 60. The charging circuit 60 converts the AC voltage input from the commercial AC power supply into a DC voltage and outputs it to an output terminal.

[0112] An attachment plug 62 connectable to the plug connection portion 45 of the electric tool 20D is connected to one end of the electric wire CB3. The attachment plug 62 has a pair of plate-shaped electrodes to which a pair of rod-shaped terminals 104 provided on the plug connection portion 45 are connected, and a magnet 621 that magnetically attracts a magnetic member (e.g., an iron piece) provided on the plug connection portion 45. Here, the pair of plate-shaped electrodes constitute a second power supply member 200 that is electrically connected to the first power supply member 100 provided on the battery pack 40. In other words, the second power supply member 200 is provided on the attachment plug 62 provided at the tip of the electric wire CB3.

[0113] When the tip of the attachment plug 62 is inserted into the recess 451 of the power tool 20D with the plug 61 connected to a commercial AC power outlet, the pair of rod-shaped terminals 104 come into contact with the pair of plate-shaped electrodes, respectively. The magnet 621 of the attachment plug 62 magnetically attracts a magnetic member provided on the plug connection portion 45, thereby holding the pair of rod-shaped terminals 104 and the pair of plate-shaped electrodes in an electrically connected state. At this time, the charging circuit 60 of the charging device 50D is electrically connected to the battery pack 40 via the pair of plate-shaped electrodes and the pair of rod-shaped terminals 104, and the battery pack 40 is charged by the charging circuit 60.

[0114] Therefore, when a user performing work using the power tool 20D places the power tool 20D, for example, on the shelf 302 of the work cart 300 during a rest period between work tasks and connects the attachment plug 62 of the charging device 50D to the plug connection portion 45 of the power tool 20D, the charging device 50D charges the battery pack 40 of the power tool 20D each time. Therefore, the battery pack 40 can be charged while the battery pack 40 is attached to the power tool 20D, and the effort required for charging the battery pack 40 can be reduced.

[0115] The charging system 1 of the fifth modification includes a holding unit 620 including a magnet 621 provided on the attachment plug 62 and a magnetic member provided on the plug connection unit 45. The holding unit 620 holds the first power supply member 100 and the second power supply member 200 in contact with each other by magnetic force. This ensures that the first power supply member 100 and the second power supply member 200 are electrically connected to each other. The holding unit 620 is not limited to the magnet 621, and may be realized by an electromagnet or the like. When the attachment plug 62 is pulled by an external force larger than the attraction force of the magnet 621, the attachment plug 62 is detached from the plug connection unit 45, thereby improving safety.

[0116] It is not essential that the attachment plug 62 is provided with the magnet 621, and the attachment plug 62 and the plug connection portion 45 may be connected by recess-projection fitting.

[0117] (3.6) Other Modifications The control unit 21 of the power tool 20, 20A to 20D and the charging circuit 60 of the charging device 50, 50A to 50D in the present disclosure include a computer system. The computer system is mainly composed of a processor and a memory as hardware. The processor executes a program recorded in the memory of the computer system to realize the functions of the control unit 21 and the charging circuit 60 in the present disclosure. The program may be pre-recorded in the memory of the computer system, may be provided through an electric communication line, or may be provided by being recorded in a non-transitory recording medium such as a memory card, an optical disk, or a hard disk drive that can be read by the computer system. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large scale integrated circuit (LSI). The integrated circuits such as IC or LSI are called by different names depending on the degree of integration, and include integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Furthermore, a field-programmable gate array (FPGA) that is programmed after the manufacture of an LSI, or a logic device that allows reconfiguration of the connection relationship within the LSI or reconfiguration of the circuit partition within the LSI, can also be employed as a processor. The electronic circuits may be integrated into one chip, or may be distributed among multiple chips. The chips may be integrated into one device, or may be distributed among multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Thus, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

[0118] In the power tools 20, 20A to 20D of the basic configuration and the first to fifth modifications, the battery pack 40 is detachable from the tool body 30. However, the battery pack 40 may be provided integrally with the tool body 30.

[0119] In the basic configuration and modified examples 1 to 5, the charging devices 50, 50A to 50D are used in a state where they are attached to the work cart 300 shown in Fig. 4, but the object to which the charging devices 50, 50A to 50D are attached can be changed as appropriate. The object to which the charging devices 50, 50A to 50D are attached may be a workbench without wheels, or may be a workbench suspended from a ceiling or the like.

[0120] (summary) The above-described embodiments and the like disclose the following aspects.

[0121] The charging system (1) of the first aspect includes a battery pack (40) and a charging device (50, 50A-50D). The battery pack (40) can supply power to a drive circuit (23) of the power tool (20, 20A-20D). The power tool (20, 20A-20D) has a motor (22) and a drive circuit (23) that drives the motor (22). The charging device (50, 50A-50D) has a charging circuit (60) that can receive power from an external power source (2) and supply a charging current to the battery pack (40). The battery pack (40) includes an all-solid-state battery (41). The charging device (50, 50A-50D) has a second power supply member (200) that can come into contact with a first power supply member (100) electrically connected to the battery pack (40). When a battery pack (40) is attached to an electric power tool (20, 20A-20D) and the first power supply member (100) and the second power supply member (200) are in contact with each other, a charging circuit (60) supplies a charging current to the battery pack (40) via the second power supply member (200) and the first power supply member (100).

[0122] According to this aspect, the charging device (50, 50A-50D) charges the battery pack (40) while the battery pack (40) is attached to the power tool (20, 20A-20D). Therefore, when charging the battery pack (40), it is not necessary to detach the battery pack (40) from the power tool (20, 20A-20D), and this reduces the effort required for charging the battery pack (40).

[0123] In the charging system (1) of the second aspect, in the first aspect, one of the first power supply member (100) and the second power supply member (200) includes a rod-shaped or plate-shaped first terminal (201). The other of the first power supply member (100) and the second power supply member (200) includes second terminals (101) sandwiching the first terminal (201) from both sides.

[0124] According to this embodiment, the second terminal (101) sandwiches the first terminal (201) from both sides, thereby ensuring reliable electrical connection between the first power supply member (100) and the second power supply member (200).

[0125] The charging system (1) of the third aspect is the same as that of the first or second aspect, and further includes a holding portion (560, 620) that magnetically holds the first power supply member (100) and the second power supply member (200) in contact with each other.

[0126] According to this embodiment, the first power supply member (100) and the second power supply member (200) can be reliably electrically connected to each other.

[0127] In the charging system (1) of the fourth aspect, in any one of the first to third aspects, the charging device (50) has a housing (51) that houses the charging circuit (60). A storage recess (53) is provided on one side of the housing (51). The housing (51) supports the power tool (20, 20A) to which the battery pack (40) is attached with at least a portion of the battery pack (40) inserted in the storage recess (53). A side wall (512) of the housing (51) surrounding the storage recess (53) is provided with one or more through holes (515) that communicate with the storage recess (53).

[0128] According to this embodiment, when the battery pack (40) and the charging circuit (60) generate heat while the battery pack (40) is being charged, the air in the storage recess (53) is exchanged through the through hole (515), thereby making it possible to lower the temperatures of the battery pack (40) and the charging circuit (60).

[0129] In the charging system (1) of the fifth aspect, in the fourth aspect, a groove (514) is provided in a side wall (512) of the housing (51). One or more through holes (515) are provided in a bottom surface of the groove (514). A protrusion (516) protruding outward is provided in an edge region of the groove (514) on the side wall (512) of the housing (51).

[0130] According to this aspect, when the housing (51) is positioned with the protrusion (516) located above the groove (514) in which the through hole (515) is provided, the protrusion (516) located above the groove (514) can reduce the possibility of dust and the like entering the through hole (515).

[0131] In the charging system (1) of the sixth aspect, in any one of the first to third aspects, the charging device (50C) has a plate portion (51C) on which the battery pack (40) attached to the power tool (20C) can be placed when the battery pack (40) is attached to the power tool (20C). The first power supply member (100) is disposed at a portion of the battery pack (40) that will be placed on the plate portion (51C). The second power supply member (200) is disposed at a portion of the plate portion (51C) on which the battery pack (40) attached to the power tool (20C) will be placed.

[0132] According to this embodiment, the charging device (50C) charges the battery pack (40) attached to the power tool (20C) while the battery pack (40) is placed on the plate portion (51C). This reduces the effort required for charging the battery pack (40).

[0133] In the seventh aspect of the charging system (1) of any of the first to third aspects, the second power supply member (200) is provided on an attachment plug (62) provided at an end of the electric wire (CB3), and the first power supply member (100) is provided on a plug connection portion (45) to which the attachment plug (62) can be attached and detached.

[0134] According to this embodiment, with the battery pack (40) attached to the power tool (20D), the charging device (50D) charges the battery pack (40) by connecting the attachment plug (62) to the plug connection portion (45). This reduces the effort required for charging the battery pack (40).

[0135] In the eighth aspect of the charging system (1) of any one of the first to third aspects, the power tool (20B) has a body (31) that houses the motor (22). The charging device (50B) has a holder (58) capable of holding the body (31) in a state in which the body (31) is inserted. The first power supply member (100) is provided at a portion of the body (31) that is inserted into the holder (58), and the second power supply member (200) is disposed in the holder (58).

[0136] According to this embodiment, the charging device (50B) charges the battery pack (40) by holding the body (31) of the power tool (20B) to which the battery pack (40) is attached in the holder portion (58), thereby reducing the effort required for charging the battery pack (40).

[0137] The configurations according to the second to eighth aspects are not essential to the charging system (1) and may be omitted as appropriate.

[0138] The charging device (50, 50A to 50D) of the ninth aspect is the charging device (50, 50A to 50D) included in the charging system (1) of any of the first to eighth aspects.

[0139] According to this embodiment, the effort required for charging the battery pack (40) can be reduced.

[0140] The battery pack (40) of the tenth aspect is the battery pack (40) included in the charging system (1) of any of the first to eighth aspects.

[0141] According to this embodiment, the effort required for charging the battery pack (40) can be reduced.

[0142] The electric power tool (20, 20A to 20D) of an eleventh aspect is an electric power tool (20, 20A to 20D) to which the battery pack (40) included in the charging system (1) of any of the first to eighth aspects is attached.

[0143] According to this embodiment, the effort required for charging the battery pack (40) can be reduced. [Explanation of symbols]

[0144] 1 Charging System 2 External power supply 20,20A~20D power tools 22 Motor 23 Drive circuit 31 Torso 40 Battery Pack 41 All-solid-state battery 45 Plug connection 50,50A~50D charging device 51 Case 51C Plate section 53 Storage recess 58 Holder part 60 Charging circuit 62 Plug 100 First power supply member 101 Plug-in terminal (second terminal) 200 Second power supply member 201 Conductive bar (first terminal) 512 Side wall 514 Groove 515 Through hole 516 Protrusion 560,620 Holding part CB3 wire

Claims

1. a battery pack capable of supplying power to a drive circuit of an electric power tool having a motor and a drive circuit that drives the motor; a charging device having a charging circuit capable of receiving power from an external power source and supplying a charging current to the battery pack; the battery pack includes an all-solid-state battery; the charging device has a second power supply member that is contactable with a first power supply member that is electrically connected to the battery pack; a charging circuit that supplies a charging current to the battery pack via the second power supply member and the first power supply member when the battery pack is attached to the electric power tool and the first power supply member is in contact with the second power supply member; Charging system.

2. one of the first power supply member and the second power supply member includes a rod-shaped or plate-shaped first terminal, the other of the first power supply member and the second power supply member includes a second terminal sandwiching the first terminal from both sides; The charging system of claim 1 .

3. a holding portion that holds the first power supply member and the second power supply member in contact with each other by magnetic force; The charging system of claim 1 .

4. the charging device has a housing that houses the charging circuit, A storage recess is provided on one surface of the housing, the housing supports the power tool to which the battery pack is attached in a state in which at least a portion of the battery pack is inserted into the storage recess; The housing has a side wall surrounding the storage recess, and one or more through holes communicating with the storage recess are provided in the side wall. The charging system according to any one of claims 1 to 3.

5. A groove is provided in the side wall of the housing, The one or more through holes are provided on a bottom surface of the groove, The side wall of the housing has a protrusion protruding outward in an area of ​​an edge of the groove. The charging system according to claim 4.

6. the charging device has a plate portion on which the battery pack attached to the power tool can be placed when the battery pack is attached to the power tool, the first power supply member is disposed at a portion of the battery pack that is placed on the plate portion, The second power supply member is disposed at a portion of the plate portion on which the battery pack attached to the power tool is placed. The charging system of claim 1 .

7. The second power supply member is provided on an attachment plug provided at a tip of an electric wire, The first power supply member is provided at a plug connection portion to which the attachment plug is detachable. The charging system of claim 1 .

8. The electric power tool has a body portion that houses the motor, the charging device has a holder portion capable of holding the body portion in a state in which the body portion is inserted; the first power supply member is provided at a portion of the body portion that is inserted into the holder portion, The second power supply member is disposed in the holder portion. The charging system of claim 1 .

9. A charging device provided in the charging system according to any one of claims 1 to 3.

10. A battery pack provided in the charging system according to any one of claims 1 to 3.

11. An electric power tool to which a battery pack provided with the charging system according to any one of claims 1 to 3 is attached.

Images