Power supply devices and power supply systems

Abstract

To provide a technique that makes it possible for a power supply device to output power to a first external device using power supplied from a battery unit.SOLUTION: The power supply device includes: a body case; a first device-side engaging part provided on the body case; a first output part provided on the body case; and a device-side connector to which a battery-side connector of a first battery unit is connected. The body case includes a bottom surface and a top surface on which the first battery unit can be placed. The first device-side engaging part is engaged with a first unit-side engaged part of the first battery unit. The first output part outputs the power supplied from the first battery unit to a first external device different from the first battery unit.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a power supply device and a power supply system. [Background technology]

[0002] Patent Document 1 discloses a battery unit that houses a plurality of battery packs. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-61311 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 does not give any consideration to using the battery unit in combination with a power supply device.

[0005] This specification provides a technique that enables a power supply device to output power to a first external device using power supplied from a battery unit. [Means for solving the problem]

[0006] The power supply device disclosed in this specification may include a main body case, a first device-side engaging portion provided on the main body case, a first output portion provided on the main body case, and an device-side connector to which a battery-side connector of a first battery unit is connected. The main body case may include a bottom surface and an upper surface on which the first battery unit can be placed. The first device-side engaging portion may engage with a first unit-side engaged portion of the first battery unit, and the first output portion may output power supplied from the first battery unit to a first external device other than the first battery unit.

[0007] The power supply system disclosed herein may include a power supply device and a first battery unit. The first battery unit may include a battery case, a battery-side connector, and a first unit-side engaged portion. The power supply device may include a main body case, a first device-side engaging portion provided in the main body case and engaging with the first unit-side engaged portion, a first output portion provided in the main body case and outputting power supplied from the first battery unit to a first external device different from the first battery unit, and an device-side connector to which the battery-side connector is connected.

[0008] According to the above configuration, with the first battery unit placed on the top surface of the power supply device, the first device-side engaging portion of the power supply device engages with the first unit-side engaged portion of the first battery unit. This couples the power supply device and the first battery unit. Furthermore, with the battery-side connector and the device-side connector connected, when a first external device is electrically connected to the first output portion, power supplied from the first battery unit is output to the first external device via the power supply device. Therefore, the power supply device can output power to the first external device using power supplied from the battery unit. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view of a power supply system 2 including a power supply device 100 and a battery unit 500, as viewed from above and to the front left, in an embodiment. [Figure 2] 1 is a perspective view of a power supply system 2 including a power supply device 100 and a battery unit 700, as viewed from above and to the front left, in an embodiment. [Figure 3] FIG. 1 is a perspective view of a power supply device 100 according to an embodiment, viewed from above on the front left. [Figure 4] FIG. 1 is a perspective view of a power supply device 100 according to an embodiment, viewed from the front right below. [Figure 5] FIG. 1 is a perspective view of a power supply device 100 according to an embodiment, viewed from above and behind the left. [Figure 6] 1 is a perspective view of a first connecting mechanism 140 of the embodiment as viewed from above on the front left. FIG. [Figure 7] FIG. 2 is a perspective view of the upper case 112 of the embodiment as seen from the front lower left. [Figure 8] 10 is a perspective view of a second connecting mechanism 142 of the embodiment as viewed from above, rear right. FIG. [Figure 9] FIG. 10 is a perspective view of a third connecting mechanism 144 of the embodiment as viewed from above, rear left. [Figure 10] FIG. 10 is a perspective view of the power supply device 100 in the embodiment, seen from above and on the front left, with the fourth engagement mechanism 240 removed. [Figure 11] FIG. 10 is a perspective view of the power supply device 100 in the embodiment, seen from above the front right, with the fourth engagement mechanism 240 removed. [Figure 12] 10 is a perspective view of a fourth engagement mechanism 240 of the embodiment as viewed from above, rear right. FIG. [Figure 13] 2 is a schematic diagram of a control circuit of a power supply system 2 of the embodiment. [Figure 14] 1 is a perspective view of the power supply system 2 in the embodiment, viewed from above on the front left, with the right handle 340 and the left handle 350 in an unhoused state. [Figure 15] 1 is a top view of a power supply device 100 according to an embodiment of the present invention, as viewed from above. [Figure 16] FIG. 10 is a top view of the lower case 114 of the embodiment as seen from above. [Figure 17] FIG. 10 is a top view of the power supply system 2 seen from above in the embodiment, with the device-side socket 372 and the battery-side socket 544 connected to each other. [Figure 18] FIG. 10 is a top cross-sectional view of the lower case 114 of the embodiment. [Figure 19] FIG. 1 is a front cross-sectional view of a power supply device 100 according to an embodiment. [Figure 20] FIG. 2 is a perspective view of the battery unit 500 of the embodiment as viewed from the rear right below. [Figure 21] FIG. 10 is a perspective view of the locking mechanism 562 of the embodiment as viewed from above, rear right. [Figure 22] 1 is a perspective view of the battery unit 500 being attached to the power supply device 100 in the embodiment, as viewed from above on the front left. [Figure 23] 23 is a front cross-sectional view of the vicinity of a first connecting mechanism 140 in the state of FIG. 22 in the embodiment. [Figure 24] 2 is a front cross-sectional view of the vicinity of a second connecting mechanism 142 in the state of FIG. 1 in the embodiment. [Figure 25] 2 is a front cross-sectional view of the vicinity of a first connecting mechanism 140 in the state of FIG. 1 in the embodiment. [Figure 26] FIG. 2 is a perspective view of the battery unit 700 of the embodiment as viewed from the front right below. [Figure 27] FIG. 2 is a perspective view of the battery unit 700 of the embodiment as viewed from the rear right below. [Figure 28] 3 is a front cross-sectional view of the first connecting mechanism 140 and its vicinity in the state shown in FIG. 2 in the embodiment. [Figure 29] 3 is a left cross-sectional view of the vicinity of a third connecting mechanism 144 in the state of FIG. 2 in the embodiment. [Figure 30] 1 is a front view of the power supply system 2 in the embodiment, in which the right handle 340 and the left handle 350 are in an unretracted state. [Figure 31] FIG. 1 is a perspective view of two power supply devices 100 connected vertically in the embodiment, as viewed from above on the front left. [Figure 32] FIG. 1 is a perspective view of the power supply device 100 and the tool box 900 connected vertically in the embodiment, as viewed from above on the front left. [Figure 33] 1 is a perspective view of the power supply device 100 placed on a trolley 1000, as viewed from above and to the front left, in the embodiment. [Figure 34] 1 is a perspective view of the power supply device 100 placed on a cart 1200, as viewed from above and to the front left, in the embodiment. [Figure 35] 32 is a right cross-sectional view of the vicinity of a fourth engagement mechanism 240 in FIG. 31. FIG. [Figure 36]FIG. 1 is a perspective view of a tool box 900 according to an embodiment, seen from above on the front left side. [Figure 37] FIG. 1 is a perspective view of a tool box 900 according to an embodiment, viewed from the rear right below. [Figure 38] 1 is a perspective view of the trolley 1000 of the embodiment as seen from above, front left. [Figure 39] FIG. 13 is a perspective view of a modified power supply device 1300 as viewed from above the front left. [Figure 40] FIG. 10 is a perspective view of the power supply device 1300 in a modified example, seen from above the front left, with the fourth engagement mechanism 1340 removed. DETAILED DESCRIPTION OF THE INVENTION

[0010] Representative, non-limiting embodiments of the present invention are described in detail below with reference to the drawings. This detailed description is intended simply to provide those skilled in the art with details for implementing preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Furthermore, the additional features and inventions disclosed can be used separately or in conjunction with other features and inventions to provide further improved power supplies and power systems.

[0011] Furthermore, the combinations of features and steps disclosed in the following detailed description are not essential to practicing the invention in its broadest sense, but are described solely to specifically illustrate exemplary embodiments of the invention. Furthermore, the various features of the following exemplary embodiments and those described in the claims do not necessarily have to be combined in the exact embodiments described herein or in the exact order listed to provide additional and useful embodiments of the invention.

[0012] All features described in this specification and / or claims are intended to be disclosed individually and independently of one another as limitations to the specific features described in the original disclosure and claims, apart from the configuration of features described in the examples and / or claims. Furthermore, all numerical ranges and group or aggregate descriptions are intended to disclose intermediate configurations thereof as limitations to the specific features described in the original disclosure and claims.

[0013] In one or more embodiments, a power supply device may include a main body case, a first device-side engaging portion provided on the main body case, a first output portion provided on the main body case, and an device-side connector to which a battery-side connector of a first battery unit is connected. The main body case may include a bottom surface and an upper surface on which the first battery unit can be placed. The first device-side engaging portion may engage with a first unit-side engaged portion of the first battery unit, and the first output portion may output power supplied from the first battery unit to a first external device other than the first battery unit.

[0014] In one or more embodiments, the device may be configured so that a second external device different from the first battery unit can be placed on the top surface of the main body case, and / or so that the main body case can be placed on the top surface of the second external device.

[0015] According to the above configuration, the power supply device can be placed on the top surface of the second external device, and / or when the first battery unit is not placed on the top surface of the main body case, the second external device can be placed on the top surface of the main body case. In this case, the power supply device and the second external device can be carried or stored in a vertically stacked state. This improves user convenience.

[0016] In one or more embodiments, the power supply device is further capable of engaging with a device-side engaging portion of the second external device, and the first Device side The device may include a second device-side engaging portion different from the engaging portion, and / or a device-side engaged portion that can be engaged with the device-side engaging portion of the second external device.

[0017] According to the above configuration, the power supply device and the second external device are connected by the second device-side engaging portion engaging with the device-side engaged portion and / or the device-side engaging portion engaging with the device-side engaged portion, which makes it possible to prevent the power supply device and the second external device from becoming misaligned when the power supply device and the second external device are carried in a stacked state.

[0018] In one or more embodiments, the top surface may have a first groove capable of accommodating the first device-side engaging portion. The first device-side engaging portion may be movable between a first state in which it protrudes upward from the top surface and a second state in which it is accommodated in the first groove. The first device-side engaging portion may engage with the first unit-side engaged portion of the first battery unit when the first device-side engaging portion is in the first state, and may be in the second state when the second external device is placed on the top surface of the main body case.

[0019] For example, in a configuration in which the first device-side engaging portion is fixed in a first state protruding upward from the top surface of the main body case, when a second external device is placed on the top surface of the main body case, the first device-side engaging portion and the bottom surface of the second external device may come into contact with each other, potentially damaging the bottom surface of the second external device. According to the above configuration, when the second external device is placed on the top surface of the main body case, the first device-side engaging portion is accommodated in the first groove. Therefore, damage to the bottom surface of the second external device can be prevented.

[0020] In one or more embodiments, the power supply device may further include a biasing member that biases the first device-side engaging portion from the second state to the first state.

[0021] According to the above configuration, when a user attempts to connect the power supply device and the first battery unit, the user does not need to perform an operation to switch the first device-side engaging portion from the second state to the first state, thereby improving user convenience.

[0022] In one or more embodiments, the power supply device may further include a third device-side engaging portion that is engageable with a second unit-side engaging portion of a second battery unit that is different from the first battery unit and that is different from the first device-side engaging portion.

[0023] According to the above configuration, by utilizing the third device-side engaging portion, the second battery unit, which has a different shape from the first battery unit, can be connected to the power supply device, thereby improving user convenience.

[0024] In one or more embodiments, the upper surface may have a first groove capable of accommodating the first device-side engaging portion and a second groove capable of accommodating the third device-side engaging portion. The first device-side engaging portion may be movable between a first state in which it protrudes upward from the upper surface and a second state in which it is accommodated in the first groove. The third device-side engaging portion may be movable between a third state in which it protrudes upward from the upper surface and a fourth state in which it is accommodated in the second groove. The first device-side engaging portion may engage with the first unit-side engaged portion of the first battery unit when the first device-side engaging portion is in the first state. The third device side engaging portion may be engaged with the second unit side engaged portion of the second battery unit when the third device side engaging portion is in the third state, and may be in the fourth state when the first device side engaging portion is engaged with the first unit side engaged portion of the first battery unit.

[0025] For example, the third device-side engaging portion may be a third engaging portion that protrudes upward from the top surface of the main body case. situationIn a configuration in which the first battery unit is fixed to the second groove, when the first battery unit is placed on the upper surface of the main body case, the third device-side engaging portion comes into contact with the underside of the first battery unit, which may damage the underside of the first battery unit. According to the above configuration, when the first battery unit is placed on the upper surface of the main body case, the third device-side engaging portion is accommodated in the second groove. Therefore, damage to the underside of the first battery unit can be prevented.

[0026] In one or more embodiments, the power supply device may further include a biasing member that biases the first device-side engagement portion from the second state to the first state.

[0027] According to the above configuration, when a user attempts to connect the power supply device and the first battery unit, the user does not need to perform an operation to switch the first device-side engagement part from the second state to the first state, thereby improving user convenience.

[0028] In one or more embodiments, the power supply device may further include a first conversion circuit connected to the first output section and converting power supplied from the first battery unit, a second output section different from the first output section, and a second conversion circuit connected to the second output section and converting power supplied from the first battery unit, the second conversion circuit being different from the first conversion circuit.

[0029] According to the above configuration, it is possible to operate a plurality of types of electrical devices using the power output from the power supply device, thereby improving user convenience.

[0030] In one or more embodiments, the power supply device may further include a first conversion circuit connected to the first output section and configured to convert direct current supplied from the first battery unit into alternating current.

[0031] According to the above configuration, a user can use an electrical device that operates using AC power by utilizing the power supply device, thereby improving user convenience.

[0032] In one or more embodiments, the main body case may further include a first side surface disposed between the top surface and the bottom surface, and the device-side connector may be provided on the first side surface.

[0033] For example, if the device-side connector is provided on the top surface of the main body case, the first battery unit placed on the top surface of the main body case gets in the way, making it difficult to connect the device-side connector and the battery-side connector.With the above configuration, the user can easily connect the device-side connector and the battery-side connector.

[0034] In one or more embodiments, when the battery side connector of the first battery unit is connected to the device side connector, the battery side connector may be positioned inside the outer peripheral edge of the main body case when the power supply device is viewed from above.

[0035] When the battery-side connector is positioned outside the outer periphery of the main body case when viewed from above, the battery-side connector may collide with a wall or the like and be damaged. The above configuration prevents the battery-side connector from colliding with a wall or the like, thereby preventing damage to the battery-side connector.

[0036] In one or more embodiments, the main body case may further include a cable housing attached to the first side surface and configured to house a cable extending from the battery-side connector.

[0037] When the power supply device and the first battery unit are connected and the power supply device is carried, the cable of the first battery unit may come into contact with the user. According to the above configuration, the cable can be stored in the cable storage section when the power supply device and the first battery unit are connected. Therefore, it is possible to prevent the cable of the first battery unit from coming into contact with the user when the power supply device is carried.

[0038] In one or more embodiments, the main body case may further include a second side surface disposed between the top surface and the bottom surface, and a handle provided on the second side surface and grippable by a user. The second side surface may be provided with a handle receiving portion recessed into the main body case and configured to receive the handle. The handle may be movable between a stored state in which it is received in the handle receiving portion and an unstored state in which it is not received in the handle receiving portion.

[0039] According to the above configuration, when the user carries the power supply device, the user moves the handle to the unstorage state, and when the power supply device is placed on the ground or the like, the user moves the handle to the unstorage state. Collect can be moved to a Collection In the stored state, the handle is stored in the handle storage portion on the second side surface, which prevents the handle from coming into contact with the user when the power supply device is placed on the ground or the like.

[0040] In one or more embodiments, the second side surface of the main body case may have a vent hole, and when the power supply device is viewed from a direction perpendicular to the second side surface, the vent hole may be located inside the handle.

[0041] According to the above configuration, the flow of air exhausted from the main body case to the outside is not obstructed by the handle, which makes it easier to exhaust air from the main body case to the outside.

[0042] In one or more embodiments, the main body case may further include an inclined portion that protrudes in a first direction from a first end of the top surface and has an end portion on the first direction side that slopes downward. The inclined portion may be provided with a display unit and an output operation unit for operating the first output unit.

[0043] A configuration in which the display unit is provided on the inclined portion can improve the user's visibility of the display unit compared to a configuration in which the display unit is provided on the top surface of the main body case or a side surface perpendicular to the top surface. Also, a configuration in which the output operation unit is provided on the inclined portion can improve the user's operability of the output operation unit compared to a configuration in which the output operation unit is provided on the top surface of the main body case or a side surface perpendicular to the top surface.

[0044] In one or more embodiments, the main body case may further include a third side surface extending downward from the first end of the top surface and having the first output unit disposed thereon. The first output unit may be located below the display unit and the output operation unit.

[0045] According to the above configuration, the inclined portion is located above the first output portion. Also, the inclined portion protrudes further in the first direction than the first output portion. Therefore, the inclined portion can prevent water from above the power supply device from reaching the first output portion.

[0046] In one or more embodiments, when the first battery unit is placed on the top surface of the main body case, a power supply operation unit may be provided on a battery side surface of the first battery unit on the first direction side, and when a user operates the power supply operation unit, power may be supplied from the first battery unit to the power supply device.

[0047] With the above configuration, when the battery units are placed on the top surface of the main body case, both the output operation unit of the power supply device and the power operation unit of the first battery unit are located on the first direction side, thereby improving user operability.

[0048] In one or more embodiments, the output section may be provided with a protection section that protects the output section.

[0049] According to the above configuration, it is possible to prevent water from reaching the output portion.

[0050] (Example) The power supply system 2 of this embodiment shown in Figures 1 and 2 is a device that supplies power to a power tool, etc. The power supply system 2 is configured by detachably attaching one of the battery unit 500 shown in Figure 1 and the battery unit 700 shown in Figure 2 to the power supply device 100 shown in Figure 3.

[0051] (Configuration of power supply device 100) As shown in FIG. 3, the power supply device 100 includes a main body case 110. The main body case 110 is generally rectangular parallelepiped in shape and is divided into an upper case 112 and a lower case 114. The upper case 112 and the lower case 114 are fixed to each other with screws (not shown). The main body case 110 includes a top surface 120, a bottom surface 122 (see FIG. 4), a front surface 124, a rear surface 126 (see FIG. 5), a right surface 128 (see FIG. 4), and a left surface 130. Four recesses 121a to 121d recessed downward are provided at the four corners of the top surface 120. Two first coupling mechanisms 140, a second coupling mechanism 142, and two third coupling mechanisms 144 are provided on the top surface 120. The two first coupling mechanisms 140 are provided on the right end of the top surface 120. The front first coupling mechanism 140 is provided closer to the front end than the center in the front-rear direction of the top surface 120, and the rear first coupling mechanism 140 is provided closer to the rear end than the center in the front-rear direction of the top surface 120. The second coupling mechanism 142 is provided at the left end of the top surface 120. The second coupling mechanism 142 is provided at the center in the front-rear direction of the top surface 120. The two third coupling mechanisms 144 are provided at both ends in the front-rear direction of the top surface 120. The two third coupling mechanisms 144 are provided closer to the left end than the center in the left-right direction of the top surface 120. Openings 120a to 120e that penetrate the upper case 112 in the up-down direction are formed on the top surface 120 at positions corresponding to the two first coupling mechanisms 140, the second coupling mechanism 142, and the two third coupling mechanisms 144, respectively. 4, four protrusions 122a to 122d that protrude downward are provided at four corners of the bottom surface 122. The four protrusions 122a to 122d are provided below the four recesses 121a to 121d of the top surface 120, respectively. The four protrusions 122a to 122d have shapes that correspond to the four recesses 121a to 121d of the top surface 120, respectively.

[0052] (Configuration of the first connecting mechanism 140) The front-side first coupling mechanism 140 and the rear-side first coupling mechanism 140 in FIG. 3 are symmetrically positioned and shaped relative to each other. As shown in FIG. 6, the front-side first coupling mechanism 140 includes a first coupling case 150, a first engagement mechanism 152, and two torsion springs 154. As shown in FIG. 7, the first coupling case 150 is fixed to the upper case 112 by screws from below. As shown in FIG. 6, the first engagement mechanism 152 includes a base 156 extending vertically, a first protrusion 158 extending leftward from the upper portion of the base 156, a second protrusion 160 protruding downward from the lower end of the first protrusion 158, and a pivot shaft 162. The pivot shaft 162 extends forward from the front end of the lower portion of the base 156 and rearward from the rear end of the lower portion of the base 156. The first engagement mechanism 152 is held by the first connecting case 150 so as to be rotatable about a rotation shaft 162. The first engagement mechanism 152 is movable between a housed state in which it is housed in the opening 120a (see FIG. 3) and an unhoused state in which it protrudes upward from the upper surface 120 (see FIG. 3). Two torsion springs 154 are provided at both the front and rear ends of the rotation shaft 162. The first engagement mechanism 152 is biased from the housed state to the unhoused state by the biasing force of the torsion springs 154. As shown in FIG. 3, the right part of the base 156 is in contact with the main case 110.

[0053] (Configuration of second connecting mechanism 142) As shown in FIG. 8, the second connecting mechanism 142 includes a second connecting case 170, a second engaging mechanism 172, and two torsion springs 174. As shown in FIG. 7, the second connecting case 170 is fixed to the upper case 112 by screws from below. As shown in FIG. 8, the second engaging mechanism 172 includes a base 176 extending in the vertical direction, a protrusion 178 extending leftward from the upper portion of the base 176, and a pivot shaft 180. The upper surface 178a of the protrusion 178 is inclined downward on the left side. The lower surface 178b of the protrusion 178 is parallel to a plane including the vertical and horizontal directions. The pivot shaft 180 extends forward from the front end of the lower portion of the base 176 and extends rearward from the rear end of the lower portion of the base 176. The second engagement mechanism 172 is held by the second connecting case 170 so as to be rotatable around the rotation shaft 180. The second engagement mechanism 172 is movable between a housed state in which it is housed in the opening 120c (see FIG. 3) and a non-housed state in which it protrudes upward from the upper surface 120 (see FIG. 3). Two torsion springs 174 are provided at both the front and rear ends of the rotation shaft 180. The second engagement mechanism 172 is biased from the housed state to the non-housed state by the biasing force of the torsion spring 174.

[0054] (Configuration of the third connecting mechanism 144) The front-side third coupling mechanism 144 and the rear-side third coupling mechanism 144 in FIG. 3 are positioned and shaped symmetrically to each other in the front-rear direction. As shown in FIG. 9, the third coupling mechanism 144 provided on the front side of the main body case 110 includes a third coupling case 190 and a third engagement mechanism 192. As shown in FIG. 7, the third coupling case 190 is fixed to the upper case 112 from below by screws. As shown in FIG. 9, the third engagement mechanism 192 includes a front plate portion 194 extending in the vertical direction, a first right plate portion 196 extending rearward from the right end of the front plate portion 194, a first left plate portion 198 extending rearward from the left end of the front plate portion 194, a pivot shaft 200, and a bottom plate portion 204 extending rearward from the lower end of the front plate portion 194. The first right plate 196 is provided with an engagement protrusion 196a that protrudes to the right, and the first left plate 198 is provided with an engagement protrusion 198a that protrudes to the left. The engagement protrusions 196a, 198a are configured to be elastically deformable. A rotation shaft 200 extends rightward from the lower portion of the first right plate 196 and extends leftward from the lower portion of the first left plate 198. The third engagement mechanism 192 is held in the third connecting case 190 so as to be rotatable about the rotation shaft 200. The third engagement mechanism 192 is movable between a housed state in which it is housed in the opening 120d (see FIG. 3) and a non-housed state in which it protrudes upward from the top surface 120 (see FIG. 3). The third engagement mechanism 192 further includes an upper plate 202, a second right plate 206, a second left plate 208, and a center plate 210. The upper plate portion 202 is provided below the upper end of the front plate portion 194 and extends rearward from the front plate portion 194. The second right plate portion 206 is provided to the left of the first right plate portion 196. The second right plate portion 206 extends rearward from the front plate portion 194 and connects the right end of the upper plate portion 202 to the bottom plate portion 204. The second left plate portion 208 is provided to the right of the first left plate portion 198. The second left plate portion 208 extends rearward from the front plate portion 194 and connects the left end of the upper plate portion 202 to the bottom plate portion 204. The center plate portion 210 extends rearward from the front plate portion 194 and connects the upper plate portion 202 to the bottom plate portion 204 at the center of the upper plate portion 202 in the left-right direction.Between the second right plate portion 206 and the central plate portion 210, two protruding plate portions 212 are provided, which extend upward from the upper surface of the bottom plate portion 204 and extend rearward from the rear surface of the front plate portion 194. Between the second left plate portion 208 and the central plate portion 210, two protruding plate portions 214 are provided, which extend upward from the upper surface of the bottom plate portion 204 and extend rearward from the rear surface of the front plate portion 194.

[0055] (Configuration of upper connecting portion 220 and lower connecting portion 221) As shown in FIGS. 3 and 4, the main body case 110 is provided with four upper connecting portions 220 at the upper end of the main body case 110 and four lower connecting portions 221 at the lower end of the main body case 110. As shown in FIG. 3, the four upper connecting portions 220 are provided at both left and right end portions of the front face 124, at the rear end portion of the right face 128 (see FIG. 4), and at the rear end portion of the left face 130. The four upper connecting portions 220 are provided in different positions and directions but have the same shape. The four lower connecting portions 221 are provided below the four upper connecting portions 220. The four lower connecting portions 221 are provided in different positions and directions but have the same shape.

[0056] As shown in FIG. 10, the upper connecting portion 220 provided at the right end of the front surface 124 of the main body case 110 has a recessed shape with openings at the front and top. The upper connecting portion 220 has a bottom surface 220a, a rear surface 220b, a right surface 220c, and a left surface 220d (see FIG. 11). The bottom surface 220a extends along the front-rear and left-right directions and faces upward. The rear surface 220b extends along the up-down and left-right directions and faces forward. The right surface 220c extends along the front-rear and up-down directions and faces left. As shown in FIG. 11, the left surface 220d extends along the front-rear and up-down directions and faces right. The rear surface 220b is provided with four protrusions 222a to 222d that protrude forward. The protrusions 222a and 222b are arranged side by side in the left-right direction. The protrusions 222a and 222c are downwardThe left surface 220d is provided with a left groove 226 that extends in the vertical direction and is recessed to the left. As shown in FIG. 10, the right surface 220c is provided with a right groove 224 that extends in the vertical direction and is recessed to the right.

[0057] The lower connecting portion 221 provided at the right end of the front surface 124 of the main body case 110 has a recessed shape with openings at the front and bottom. The lower connecting portion 221 has an upper surface 228a (see FIG. 4), a rear surface 228b, a right surface 228c, and a left surface 228d (see FIG. 11). As shown in FIG. 4, the upper surface 228a extends along the front-rear and left-right directions and faces upward. As shown in FIG. 10, the rear surface 228b extends along the up-down and left-right directions and faces forward. The right surface 228c extends along the front-rear and up-down directions and faces left. As shown in FIG. 11, the left surface 228d extends along the front-rear and up-down directions and faces right. The rear surface 228b is provided with two protrusions 230a and 230b that protrude forward. The protrusions 230a and 230b are arranged side by side in the left-right direction.

[0058] (Configuration of the fourth engagement mechanism 240) As shown in Fig. 3, a fourth engagement mechanism 240 is attached to each of the four upper connecting portions 220. The four fourth engagement mechanisms 240 are provided in different positions and directions, but have the same shape. As shown in Fig. 12, the fourth engagement mechanism 240 attached to the upper connecting portion 220 at the right end of the front surface 124 of the main body case 110 includes a front plate portion 242 extending in the vertical direction, an upper plate portion 244 extending rearward from an upper portion of the front plate portion 242, a bottom plate portion 246 extending rearward from a lower portion of the front plate portion 242, a right plate portion 248 extending rearward from the right end of the front plate portion 242, a left plate portion 250 extending rearward from the left end of the front plate portion 242, a first rotating shaft 252, and a second rotating shaft 254. The first rotating shaft 252 extends rightward from the lower part of the right plate portion 248. The second rotating shaft 254 extends leftward from the lower part of the left plate portion 250. The first rotating shaft 252 is disposed in the right groove portion 224 (see FIG. 10) of the upper connecting portion 220, and the second rotating shaft 254 is disposed in the left groove portion 226 (see FIG. 11) of the upper connecting portion 220. The fourth engagement mechanism 240 is rotatable about the first rotating shaft 252 and the second rotating shaft 254, and is held by the main body case 110 so as to be movable up and down along the right groove portion 224 and the left groove portion 226. The fourth engagement mechanism 240 further includes a central plate portion 256 that connects the top plate portion 244 and the bottom plate portion 246 in the vertical direction at the center of the top plate portion 244 in the horizontal direction, a first connecting plate portion 258 that connects the central plate portion 256 and the right plate portion 248 in the horizontal direction, and a second connecting plate portion 260 that connects the central plate portion 256 and the left plate portion 250 in the horizontal direction. The width of the central plate portion 256 in the horizontal direction is smaller than the distance between the protrusions 222a and 222b of the upper connecting portion 220 (see FIG. 10). The vertical distance between the top plate portion 244 and the first connecting plate portion 258 is larger than the distance between the upper end of the protrusion 222a and the lower end of the protrusion 222c of the upper connecting portion 220 (see FIG. 10). An elastically deformable right convex portion 262 is provided on the right plate portion 248, and an elastically deformable left convex portion 264 is provided on the left plate portion 250. When the right convex portion 262 of the fourth engagement mechanism 240 comes into contact with the right surface 220c (see FIG. 10) of the upper connecting portion 220 and a part of the right convex portion 262 fits into the right groove portion 224 (see FIG. 10) of the right surface 220c, the right convex portion 262 elastically deforms to the left.Furthermore, the left protrusion 264 of the fourth engagement mechanism 240 contacts the left surface 220d (see FIG. 11) of the upper connecting portion 220, and a part of the left protrusion 264 fits into the left groove of the left surface 220d. 226 (see FIG. 11), the left protrusion 264 elastically deforms to the right. With the right protrusion 262 and the left protrusion 264 elastically deformed, the fourth engagement mechanism 240 is fixed to the upper connecting portion 220 (see FIG. 10).

[0059] (Configuration of waterproof wall 280) As shown in FIG. 3, a waterproof wall 280 extending forward from the front end of the front surface 124 is connected to the front surface 124 of the main body case 110. An upper surface 280a of the waterproof wall 280 is inclined downward toward the front. The inclination angle of the upper surface 280a is, for example, approximately 20 degrees. A display unit 282, a USB power switch 284, an AC power switch 286, a frequency selector switch 288, a DC power switch 290, and a buzzer switch 292 are provided on the upper surface 280a. The display unit 282 displays the amount of power output from the power supply device 100. The USB power switch 284 is a switch that switches on / off a USB output unit 312 (see FIG. 4), which will be described later. The AC power switch 286 is a switch that switches on / off an AC output unit 314 (see FIG. 4), which will be described later. The frequency selector switch 288 is a switch that switches the frequency of the power output from the AC output unit 314 (see FIG. 4), which will be described later. A user can switch the frequency of the power output from an AC output unit 314 (see FIG. 4), which will be described later, between 50 Hz and 60 Hz by operating the frequency selector switch 288. The DC power switch 290 is a switch that switches the DC output unit 316 (see FIG. 4), which will be described later, on and off. The buzzer switch 292 is a switch that switches the operation of a buzzer 294 (see FIG. 13). In this embodiment, the buzzer 294 (see FIG. 13) is configured to operate when the capacity of the battery units 500, 700 (see FIGS. 1 and 2) falls below a predetermined capacity, or when the power output from the power supply device 100 exceeds a predetermined power (e.g., 1400 W). The power supply device 100 is not provided with a main power switch for switching the power supply device 100 on and off.

[0060] (Configuration of output unit 310) As shown in FIG. 4 , an output unit 310 is provided on the front surface 124 of the main body case 110 below the waterproof wall 280. The output unit 310 includes a USB output unit 312, an AC output unit 314, and a DC output unit 316. The USB output unit 312 is provided with four USB ports to which multiple types of USB cables (e.g., Type A or Type C) can be connected. The AC output unit 314 is provided with two outlets. The DC output unit 316 is provided with a cigarette lighter socket. The front surface 124 of the main body case 110 is provided with a USB protector 320 that protects the USB output unit 312, an AC protector 322 that protects the AC output unit 314, and a DC protector 324 that protects the DC output unit 316. The USB protector 320, the AC protector 322, and the DC protector 324 are held by the main body case 110 so as to be rotatable relative to the main body case 110. The USB protector 320, AC protector 322, and DC protector 324 are movable between a protected state (see FIG. 3) in which they cover the USB output unit 312, AC output unit 314, and DC output unit 316, and a non-protected state (see FIG. 4) in which they do not cover the USB output unit 312, AC output unit 314, and DC output unit 316. The USB protector 320, AC protector 322, and DC protector 324 can be rotated to a position where their angle with the front surface 124 of the main body case 110 is approximately 90 degrees. The waterproof wall 280, the USB protector 320, the AC protector 322, and the DC protector 324 prevent water from reaching the USB output unit 312, the AC output unit 314, and the DC output unit 316.

[0061] (Right handle 340, left handle 350 configuration) As shown in FIG. 4 , a right handle 340 is provided on the right surface 128 of the main body case 110. The right handle 340 includes a front support portion 342, a rear support portion 344, and a grip portion 346. The front support portion 342 and the rear support portion 344 extend in the vertical direction. The upper end of the front support portion 342 and the upper end of the rear support portion 344 are attached to the main body case 110 so as to be rotatable around a rotation axis (not shown) extending in the front-rear direction within the main body case 110. The grip portion 346 extends in the front-rear direction and connects the lower end of the front support portion 342 and the lower end of the rear support portion 344. The right surface 128 of the main body case 110 is provided with a right handle accommodating portion 128a recessed to the left. The right handle accommodating portion 128a has a shape corresponding to the right handle 340. The right handle 340 is movable between a stored state in which it is stored in the right handle storage portion 128a and a non-stored state (see FIG. 14) in which it is not stored in the right handle storage portion 128a. As shown in FIG. 14, the right handle 340 can be pulled up to a position at approximately 90 degrees relative to the right surface 128.

[0062] As shown in FIG. 3 , a left handle 350 is provided on the left surface 130 of the main body case 110. The left handle 350 includes a front support portion 352, a rear support portion 354, and a grip portion 356. The front support portion 352 and the rear support portion 354 extend in the vertical direction. The upper end of the front support portion 352 and the upper end of the rear support portion 354 are attached to the main body case 110 so as to be rotatable around a rotation axis (not shown) extending in the front-rear direction within the main body case 110. The grip portion 356 extends in the front-rear direction and connects the lower end of the front support portion 352 and the lower end of the rear support portion 354. The left surface 130 of the main body case 110 is provided with a left handle accommodating portion 130a recessed to the right. The left handle accommodating portion 130a has a shape corresponding to the left handle 350. The left handle 350 is movable between a stored state in which it is stored in the left handle storage portion 130a and a non-stored state in which it is not stored in the left handle storage portion 130a (see FIG. 14). As shown in FIG. 14, the left handle 350 can be pulled up to a position at approximately 90 degrees relative to the left surface 130.

[0063] 15 , when the right handle 340 and the left handle 350 are in the stored state, the right handle 340 and the left handle 350 cannot be seen even when the power supply device 100 is viewed from above. That is, in the stored state, the right end of the right handle 340 is located to the left of the right surface 128 of the main body case 110, and the left end of the left handle 350 is located to the right of the left surface 130 of the main body case 110.

[0064] (Configuration of socket IF unit 370) As shown in FIG. 5, a socket IF unit 370 is provided on the upper part of the rear surface 126 of the main body case 110. The socket IF unit 370 has a front surface 370a, a right surface 370b, and a left surface 370c (see FIG. 15). The front surface 370a is aligned with the up-down and left-right directions and faces rearward. The right surface 370b is aligned with the up-down direction, has its rear side inclined to the right, and faces rearward to the left. As shown in FIG. 15, the left surface 370c is aligned with the up-down direction, has its rear side inclined to the left, and faces rearward to the right. As shown in FIG. 16, a device-side socket unit 372 is provided on the right surface 370b. A central axis 372a of the device-side socket unit 372 is inclined rearward by a predetermined angle α with respect to the left-right direction when the power supply device 100 is viewed from above. In this embodiment, the predetermined angle α is, for example, approximately 20 degrees. As shown in Fig. 17, by setting the angle at this level, it is possible to ensure space for the user to attach and detach a battery-side socket 544 of the battery unit 500, which will be described later, to the device-side socket 372. As shown in Fig. 15, a socket protection part 374 that protects the device-side socket 372 is provided on the right surface 370b. The socket protection part 374 is movable between a protected state in which it covers the device-side socket 372 and an unprotected state (not shown) in which it does not cover the device-side socket 372.

[0065] (Configuration of cable housing section 380) As shown in FIG. 5, a cable housing 380 is further provided on the rear surface 126 of the main body case 110. The cable housing 380 is provided below the socket IF unit 370. The cable housing 380 is composed of a pocket 382 and a recessed portion 384. The pocket 382 is fixed to the rear surface 126 of the main body case 110 by screws. The pocket 382 includes a rear plate portion 382a, a right plate portion 382b, a left plate portion 382c, and a bottom plate portion 382d. The rear plate portion 382a extends in the up-down direction and the left-right direction. The rear plate portion 382a is located rearward of the rear surface 126 of the main body case 110. The right plate portion 382b extends in the up-down direction and is inclined so that its rear side slopes leftward. The left plate portion 382c extends in the up-down direction and is inclined so that its rear side slopes rightward. The bottom plate portion 382d is aligned with the left-right direction and is inclined such that the rear side slopes upward. As shown in FIG. 18, the recessed portion 384 has a front surface 384a, a right surface 384b, and a left surface 384c. The front surface 384a is aligned with the up-down and left-right directions and faces rearward. The right surface 384b is aligned with the up-down direction and is inclined with the rear side sloped rightward and faces rearward left. The left surface 384c is aligned with the up-down direction and is inclined with the rear side sloped leftward and faces rearward right. The front surface 384a is located forward of the front surface 370a of the socket IF unit 370 (see FIG. 15). The right surface 384b is located to the right of the right surface 370b of the socket IF unit 370 (see FIG. 15). The left surface 384c is located to the left of the left surface 370c of the socket IF unit 370 (see FIG. 15). That is, the area of ​​recess 384 when power supply device 100 is viewed from above is larger than the area of ​​socket IF section 370 (see FIG. 15). With this configuration, it is possible to increase the space inside cable housing section 380 while keeping the size of power supply device 100 compact.

[0066] (Internal configuration of main body case 110) As shown in FIG. 16, the main body case 110 accommodates an intake duct 400, an exhaust duct 402, and a circuit board case 404. The intake duct 400 connects the left side 130 of the main body case 110 to the left end of the circuit board case 404. The exhaust duct 402 connects the right side 128 of the main body case 110 to the right end of the circuit board case 404. As shown in FIG. 18, the circuit board case 404 accommodates a control board 406 and two cooling fans 408. As shown in FIG. 3, the left side 130 of the main body case 110 is provided with a plurality of intake holes 130b. The plurality of intake holes 130b are provided in positions facing the intake duct 400 (see FIG. 18). The plurality of intake holes 130b are arranged between the front support portion 352 and the rear support portion 354 of the left handle 350, and are arranged above the grip portion 356. The upper end of the uppermost air intake hole 130b among the plurality of air intake holes 130b is located lower than the upper end of the front support part 352 and the upper end of the rear support part 354. That is, when the left handle 350 is in the stowed state, the plurality of air intake holes 130b are located inside the left handle 350. As shown in FIG. 19, the plurality of air intake holes 130b are inclined so that the left side is inclined downward. This configuration prevents water from entering the main body case 110 through the plurality of air intake holes 130b. As shown in FIG. 4, a plurality of exhaust holes 128b are provided on the right surface 128 of the main body case 110. The plurality of exhaust holes 128b are provided in positions facing the exhaust duct 402 (see FIG. 18). The plurality of exhaust holes 128b are located between the front support part 342 and the rear support part 344 of the right handle 340 and are located above the grip part 346. The upper end of the uppermost exhaust hole 128b among the multiple exhaust holes 128b is located lower than the upper end of the front support part 342 and the upper end of the rear support part 344. In other words, when the right handle 340 is in the stored state, the multiple exhaust holes 128b are located inside the right handle 340. As shown in Fig. 19, the multiple exhaust holes 128b are inclined so that the right side is inclined downward.With this configuration, when a user is holding the right handle 340 (see FIG. 14) in the unstored state, it is possible to prevent the air (e.g., hot air) exhausted from the multiple exhaust holes 128b from hitting the user's hands holding the right handle 340.

[0067] (Configuration of control circuit 420) With reference to Fig. 13, a description will be given of a control circuit 420 mounted on a control board 406 (see Fig. 18) housed in the main body case 110. The control circuit 420 has a plurality of electronic components provided on the control board 406. The configuration of the control circuit 420 will be described below, but the configuration of the control circuit 420 is not limited thereto. The configuration of the control circuit 420 can be changed as appropriate.

[0068] The control circuit 420 is electrically connected to the battery units 500, 700. The control circuit 420 includes a microcomputer 422, a regulator 424, a voltage detection circuit 426, a USB circuit unit 428, an AC circuit unit 430, and a DC circuit unit 432. The regulator 424, the voltage detection circuit 426, the USB circuit unit 428, the AC circuit unit 430, and the DC circuit unit 432 are connected to the battery units 500, 700.

[0069] Regulator 424 converts the voltage of the DC power input from battery units 500, 700 to 5 V. The DC power generated by regulator 424 is supplied to microcomputer 422, which then starts up microcomputer 422. Voltage detection circuit 426 detects the voltage of battery units 500, 700 and outputs the voltage to microcomputer 422.

[0070] The microcomputer 422 is connected to the display unit 282, the USB power switch 284, the AC power switch 286, the frequency selector switch 288, the DC power switch 290, the buzzer switch 292, and the buzzer 294. Although not shown, the microcomputer 422 is also connected to a USB circuit unit 428, an AC circuit unit 430, and a DC circuit unit 432. The microcomputer 422 controls the operation of the USB circuit unit 428 based on a signal input from the USB power switch 284, controls the operation of the AC circuit unit 430 based on signals input from the AC power switch 286 and the frequency selector switch 288, and controls the operation of the DC circuit unit 432 based on a signal input from the DC power switch 290. The microcomputer 422 also controls the operation of the buzzer 294 based on the voltage input from the voltage detection circuit 426 and the signal output from the buzzer switch 292.

[0071] The USB circuit unit 428 includes a switch circuit 434, a step-down power supply circuit 436, and a USB output unit 312. The operations of the switch circuit 434 and the step-down power supply circuit 436 are controlled by the microcomputer 422. The switch circuit 434 is a circuit for switching the USB circuit unit 428 on and off. The step-down power supply circuit 436 is a circuit for stepping down the DC power supplied from the battery units 500, 700 to a predetermined voltage (for example, 5 V). The DC power converted by the step-down power supply circuit 436 is supplied to the USB output unit 312. In a modified example, the USB circuit unit 428 may include two step-down power supply circuits. In another modified example, the USB circuit unit 428 may include a step-up / step-down power supply circuit instead of the step-down power supply circuit 436.

[0072] The AC circuit section 430 includes a switch circuit 438, a boost power supply circuit 440, an inverter circuit 442, and the AC output section 314. The operations of the switch circuit 438, the boost power supply circuit 440, and the inverter circuit 442 are controlled by the microcomputer 422. The switch circuit 438 is a circuit for switching the AC circuit section 430 on and off. The boost power supply circuit 440 is a circuit for boosting the DC power supplied from the battery units 500, 700 to a predetermined voltage (e.g., 100 V). The inverter circuit 442 is a circuit for converting the DC power into AC power. The AC power converted by the boost power supply circuit 440 and the inverter circuit 442 is supplied to the AC output section 314.

[0073] The DC circuit section 432 includes a switch circuit 444, a step-down power supply circuit 446, and a DC output section 316. The operations of the switch circuit 444 and the step-down power supply circuit 446 are controlled by the microcomputer 422. The switch circuit 444 is a circuit for switching the DC circuit section 432 on and off. The step-down power supply circuit 446 is a circuit for stepping down the DC power supplied from the battery units 500, 700 to a predetermined voltage (for example, 12 V). The DC power converted by the step-down power supply circuit 446 is supplied to the DC output section 316. In a modified example, the DC circuit section 432 includes a step-down power supply circuit 446 Alternatively, a step-up / step-down power supply circuit may be provided.

[0074] (Configuration of battery unit 500) As shown in FIG. 1, the battery unit 500 includes a battery case 510. A plurality of battery cells are housed inside the battery case 510. The output voltage of the battery unit 500 is, for example, 36 V. The battery case 510 is divided into an upper case 512 and a lower case 514. The upper case 512 and the lower case 514 are fixed to each other with screws (not shown). The battery case 510 includes a top surface 520, a bottom surface 522 (see FIG. 20), a front surface 524, a rear surface 526 (see FIG. 20), a right surface 528 (see FIG. 20), and a left surface 530.

[0075] A main power switch 532 is provided on the front surface 524 of the battery case 510. The main power switch 532 is a switch for switching on / off the main power supply of the battery unit 500. When the power supply of the battery unit 500 is switched on, the microcomputer 422 (see FIG. 13) is started up. That is, in the power supply system 2, the main power switch 532 functions as a switch for switching the power supplies of both the battery unit 500 and the power supply device 100.

[0076] As shown in FIG. 20 , a recessed portion 540 recessed to the left is provided at the bottom of the right surface 528. The recessed portion 540 includes an upper surface 540a, a first left surface 540b, second left surfaces 540c provided on both the front and rear sides of the first left surface 540b, and a connecting surface 540d connecting the first left surface 540b and the second left surface 540c. The upper surface 540a extends along the front-rear and left-right directions and faces downward. The first left surface 540b and the second left surface 540c extend along the front-rear and up-down directions and face right. The first left surface 540b is located to the left of the second left surface 540c. One end 542a of a cable 542 is connected to the first left surface 540b. The other end 542b of the cable 542 is connected to a battery-side socket 544. The recessed portion 540 is provided with a protruding portion 550 that protrudes rightward from the second left surface 540c, and a first engaged mechanism 552 that protrudes rightward from the second left surface 540c below the protruding portion 550.

[0077] As shown in FIG. 1, a protrusion 560 that protrudes leftward is provided on the left surface 530 of the battery case 510. A locking mechanism 562 is attached to the protrusion 560. As shown in FIG. 21, the locking mechanism 562 includes a base 564, an operating unit 566, a second engaged mechanism 568, and a rotating shaft 570. The base 564 extends in the vertical direction. The operating unit 566 is connected to the upper part of the base 564. The second engaged mechanism 568 extends rightward from the lower end of the base 564. An upper surface 568a of the second engaged mechanism 568 is inclined downward to the left. A lower surface 568b of the second engaged mechanism 568 is inclined downward to the left. The inclination angle of the lower surface 568b is greater than the inclination angle of the upper surface 568a. The rotating shaft 570 extends in the front-rear direction. The rotation shaft 570 is held by the battery case 510. The locking mechanism 562 is held by the battery case 510 so as to be rotatable around the rotation shaft 570. The locking mechanism 562 is biased by a torsion spring (not shown) so that the base 564 is parallel to a plane including the up-down direction and the front-rear direction.

[0078] (Method of connecting the power supply device 100 and the battery unit 500) Next, a method for connecting the power supply device 100 and the battery unit 500 will be described. First, as shown in FIG. 22, the battery unit 500 is tilted so that the right side is tilted downward. Then, as shown in FIG. 23, the battery unit 500 is moved from left to right relative to the power supply device 100 until the first engaged mechanism 552 of the battery unit 500 contacts the base 156 of the first engaging mechanism 152 of the power supply device 100. This positions the first engaged mechanism 552 of the battery unit 500 below the first protrusion 158 of the first engaging mechanism 152 of the power supply device 100. Then, the left side of the battery unit 500 is pushed down. When the left side of the battery unit 500 is pushed down, the lower surface 568b of the second engaged mechanism 568 of the battery unit 500 (see FIG. 24) contacts the upper surface 178a of the protrusion 178 of the second engaging mechanism 172 of the power supply device 100. When the battery unit 500 is further pressed down, the second engaging mechanism 172 of the power supply device 100 is rotated to the right. Then, when the upper surface 568a of the second engaged mechanism 568 of the battery unit 500 moves below the protrusion 178 of the power supply device 100, the torsion spring 174 (see FIG. 8) rotates the second engaging mechanism 172 of the power supply device 100 to the left. As a result, the second engaging mechanism 172 of the power supply device 100 engages with the second engaged mechanism 568 of the battery unit 500. Also, as shown in FIG. 25, the first engaged mechanism 552 of the battery unit 500 is positioned slightly below the first protrusion 158 of the first engaging mechanism 152 of the power supply device 100. As a result, the first engaging mechanism 152 of the power supply device 100 engages with the first engaged mechanism 552 of the battery unit 500. As a result, the power supply device 100 and the battery unit 500 are coupled together. 17 , the battery-side socket 544 of the battery unit 500 is connected to the device-side socket 372 of the power supply device 100, thereby electrically connecting the power supply device 100 and the battery unit 500. The user also stores the cable 542 of the battery unit 500 in the cable storage section 380 of the power supply device 100. This allows the user to use the power supply device 100 and the battery unit 500 as a power supply system 2.When the power supply device 100 and the battery unit 500 are connected, the third engagement mechanism 192 (see FIG. 9) of the power supply device 100 is in a housed state, i.e., housed within the openings 120d and 120e (see FIG. 3).

[0079] Also, as shown in FIG. 14, the user can carry the power supply system 2 while holding the right handle 340 and the left handle 350 by switching the right handle 340 and the left handle 350 from a stowed state to an unstowed state.

[0080] (Configuration of battery unit 700) Next, the battery unit 700 of Fig. 2 will be described. As shown in Fig. 2, the shape of the battery unit 700 is different from the shape of the battery unit 500 (see Fig. 1). The battery unit 700 also differs from the battery unit 500 (see Fig. 1) in that a plurality of battery packs (not shown) are housed inside the battery unit 700. In this embodiment, for example, two battery packs are housed inside the battery unit 700. The output voltage of the battery unit 700 is, for example, 36V.

[0081] The battery unit 700 includes a battery case 710. The battery case 710 is divided into an upper case 712 and a lower case 714. The battery case 710 includes a top surface 720, a bottom surface 722 (see FIG. 26), a front surface 724, a rear surface 726 (see FIG. 27), a right surface 728 (see FIG. 26), and a left surface 730. A main power switch 732 and a lock operation unit 734 are provided on the front surface 724 of the battery case 710. The main power switch 732 is a switch for turning on / off the main power supply of the battery unit 700. The lock operation unit 734 is a member for opening and closing the battery case 710. A user can replace a battery pack (not shown) in the battery case 710 while the battery case 710 is open. A battery-side handle 740 is provided on the lower part of the left surface 730 of the battery case 710. The battery-side handle 740 includes a front support portion 742, a rear support portion 744, and a grip portion 746. The front support portion 742 and the rear support portion 744 extend in the left-right direction. The right end portion of the front support portion 742 and the right end portion of the rear support portion 744 are fixed to the battery case 710. The grip portion 746 extends in the front-rear direction and connects the left end portion of the front support portion 742 and the left end portion of the rear support portion 744.

[0082] As shown in FIG. 26, third engagement mechanisms 750 are provided at the lower left end of the front surface 724 and the lower left end of the rear surface 726. The third engagement mechanisms 750 are provided at positions corresponding to the two third connection mechanisms 144 (see FIG. 3) of the power supply device 100. The front and rear third engagement mechanisms 750 are symmetrical in position and shape relative to each other. The front third engagement mechanism 750 has a recessed shape with openings at the front and bottom. The third engagement mechanism 750 has an upper surface 750a, a rear surface 750b, a right surface 750c (see FIG. 2), and a left surface 750d. The upper surface 750a extends along the front-rear and left-right directions and faces downward. The rear surface 750b extends along the up-down and left-right directions and faces forward. As shown in Fig. 2, right surface 750c is aligned with the front-rear and up-down directions and faces left. As shown in Fig. 26, left surface 750d is aligned with the front-rear and up-down directions and faces right. Rear surface 750b is provided with two protrusions 752a and 752b that protrude forward. Protrusions 752a and 752b are arranged side by side in the left-right direction.

[0083] A cable connection portion 760 and two first engagement mechanisms 762 are provided at the bottom of the right surface 728 of the battery case 710. The cable connection portion 760 is provided to the left of the right surface 728. The two first engagement mechanisms 762 are provided on both the front and rear sides of the cable connection portion 760. The two first engagement mechanisms 762 are provided at positions corresponding to the two first coupling mechanisms 140 (see FIG. 3) of the power supply device 100. The front first engagement mechanism 762 and the rear first engagement mechanism 762 have the same shape. The rear first engagement mechanism 762 has a recessed shape with openings at the bottom and right sides. The first engagement mechanism 762 has an upper surface 762a, a left surface 762b, a front surface 762c (see FIG. 27), and a rear surface 762d. The upper surface 762a extends along the front-rear and left-right directions and faces downward. The left surface 762b extends along the front-rear and left-right directions and faces right. As shown in FIG. 27, the front surface 762c extends along the up-down and left-right directions and faces rearward. As shown in FIG. 26, the rear surface 762d extends along the up-down and left-right directions and faces forward. The first engaged mechanism 762 further includes an extension 762e extending rightward from the lower end of the left surface 762b. The right side of the extension 762e is inclined downward. The extension 762e connects the front surface 762c (see FIG. 27) and the rear surface 762d.

[0084] (Method of connecting the power supply device 100 and the battery unit 700) Next, a method of connecting the power supply device 100 and the battery unit 700 in FIG. 2 will be described. First, as in the case of the battery unit 500 (see FIG. 22), the battery unit 700 is tilted so that the right side is tilted downward. Then, the battery unit 700 is moved from left to right relative to the power supply device 100 until the extension portion 762e (see FIG. 26) of the first engaged mechanism 762 of the battery unit 700 comes into contact with the base portion 156 (see FIG. 6) of the first engaging mechanism 152 of the power supply device 100. Thereafter, the left side of the battery unit 700 is pushed down to place the battery unit 700 on the power supply device 100. This causes the battery unit 700 to come into contact with the third connecting mechanism 144 (see FIG. 3) of the power supply device 100.700 28, the user pulls up the third engaging mechanism 192 of the power supply device 100 to engage the third engaging mechanism 192 of the power supply device 100 with the third engaged mechanism 750 of the battery unit 700. In this case, the upper case 112 of the power supply device 100 and the protruding portions 752a, 752b (see FIG. 26) of the third engaged mechanism 750 of the battery unit 700 are positioned between the top plate portion 202 and the protruding plate portions 212, 214 (see FIG. 9) of the third engaging mechanism 192 of the power supply device 100. Furthermore, the engaging protrusions 196a and 198a (see FIG. 9) of the third engaging mechanism 192 of the power supply device 100 are pressed against the right surface 750c (see FIG. 2) and the left surface 750d (see FIG. 26) of the third engaged mechanism 750 of the battery unit 700, respectively. 700 29, the extension 762e of the first engagement mechanism 762 of the battery unit 700 is positioned slightly lower than the second protrusion 160 of the first engagement mechanism 152 of the power supply device 100. As a result, the first engagement mechanism 152 of the power supply device 100 engages with the first engagement mechanism 762 of the battery unit 700. This connects the power supply device 100 and the battery unit 700. Note that, as shown in FIG. 2, when the power supply device 100 and the battery unit 700 are connected, the second engagement mechanism 172 of the power supply device 100 is in an unhoused state and is disposed between the left surface 730 of the battery unit 700 and the grip portion 746 of the battery-side handle 740. Then, the battery-side socket section (not shown) of the battery unit 700 is connected to the device-side socket section 372 (see FIG. 17) of the power supply device 100, whereby the power supply device 100 and the battery unit 700 are electrically connected.

[0085] As shown in FIG. 30 , the user can carry the power supply system 2 while grasping the right handle 340 and the left handle 350 by switching the right handle 340 and the left handle 350 from the housed state to the unhoused state. The right surface 728 of the battery unit 700 protrudes rightward from the right surface 128 of the power supply device 100. In this embodiment, the grip portion 346 of the right handle 340 in the unhoused state is located to the right of the right surface 728 of the battery unit 700. If the grip portion 346 of the right handle 340 in the unhoused state were located leftward from the right surface 728 of the battery unit 700, the grip portion 346 would be located below the battery unit 700. In this case, it would be difficult for the user to grasp the grip portion 346. The above configuration makes it easier for the user to grasp the grip portion 346.

[0086] (Other uses of the power supply device 100) 1 and 2, a configuration has been described in which battery units 500, 700 are placed on the top surface 120 of the power supply device 100, but another power supply device 100 in FIG. 31 or a tool box 900 in FIG. 32 can be placed on the top surface 120 of the power supply device 100 in this embodiment. Also, the power supply device 100 can be placed on a trolley 1000 in FIG. 33 or a cart 1200 in FIG. 34. Other methods of using the power supply device 100 will be described below.

[0087] (Two power supply units 100 are connected vertically) In FIG. 31, two power supply devices 100 are arranged one above the other. The procedure for connecting two power supply devices 100 will be described. First, the user places the upper power supply device 100 on the lower power supply device 100 so that the four recessed portions 121a to 121d on the top surface 120 of the lower power supply device 100 are positioned below the four protrusions 122a to 122d (see FIG. 4) on the bottom surface 122 of the upper power supply device 100. As a result, the four fourth engagement mechanisms 240 of the upper power supply device 100 are positioned below the four lower connecting portions 221 of the upper power supply device 100. Next, the user pulls out the upper portion of the fourth engagement mechanism 240 provided at the right end of the front surface 124 of the lower power supply device 100 forward, and then pulls the fourth engagement mechanism 240 upward. Thereafter, the user pushes the upper portion of the fourth engagement mechanism 240 rearward. As a result, as shown in Figure 35, the protrusions 230a, 230b (see Figure 3) of the upper power supply device 100 are positioned below the top plate portion 244 of the fourth engagement mechanism 240, and the protrusions 222a to 222d (see Figure 10) of the lower power supply device 100 are positioned above the bottom plate portion 246 of the fourth engagement mechanism 240. In addition, the right convex portion 262 (see Figure 12) of the fourth engagement mechanism 240 elastically deforms to the left, and the left convex portion 264 (see Figure 12) elastically deforms to the right. As a result, the fourth engagement mechanism 240 of the power supply device 100 engages with the lower coupling portion 221 of the upper power supply device 100. The user then performs the same operation on the fourth engagement mechanism 240 provided on the left side of the front surface 124 of the lower power supply device 100, the fourth engagement mechanism 240 provided on the right surface 128 of the lower power supply device 100, and the fourth engagement mechanism 240 provided on the left surface 130 of the lower power supply device 100. This connects the lower power supply device 100 to the upper power supply device 100. With the above configuration, the two power supply devices 100 can be carried while arranged vertically. Furthermore, since the two power supply devices 100 can be stored vertically, the storage space can be used effectively. Note that when the two power supply devices 100 are connected vertically, the first engagement mechanism 152 (see FIG. 6), the second engagement mechanism 172 (see FIG. 8), and the third engagement mechanism 192 (see FIG. 9) of the lower power supply device 100 are in a stored state.

[0088] (Tool box 900 placed on power supply unit 100) In FIG. 32, a tool box 900 is placed on the power supply device 100. The tool box 900 stores power tools and the like. The tool box 900 includes a tool case 910 having an upper case 912 and a lower case 914. The upper case 912 is detachably attached to the lower case 914. As shown in FIG. 36, the tool case 910 includes a top surface 920, a bottom surface 922 (see FIG. 37), a front surface 924, a rear surface 926 (see FIG. 37), a right surface 928 (see FIG. 37), and a left surface 930. Four recesses 921a to 921d that are recessed downward are provided at the four corners of the top surface 920. A handle storage portion 920a is provided on the top surface 920. The handle storage portion 920a is recessed downward. A handle 940 is stored in the handle storage portion 920a. The handle 940 includes a right support portion 942, a left support portion 944, and a grip portion 946. The right support portion 942 and the left support portion 944 extend in the front-rear direction. The front end portion of the right support portion 942 and the front end portion of the left support portion 944 are attached to the tool case 910 so as to be rotatable about a rotation axis (not shown) extending in the left-right direction within the tool case 910. The grip portion 946 extends in the left-right direction and connects the rear end portion of the right support portion 942 to the rear end portion of the left support portion 944. The handle accommodating portion 920a has a shape corresponding to the handle 940. Four upper connecting portions 220 are provided at both left and right ends of the upper part of the front surface 924 of the tool case 910, at the upper part of the right side 928, and at the upper part of the left side 930. A fourth engagement mechanism 240 is attached to each of the four upper connecting portions 220. Four lower connecting portions 221 are provided on both the left and right ends of the lower portion of the front surface 924 of the tool case 910, on the lower portion of the right surface 928 (see FIG. 37), and on the lower portion of the left surface 930. Four fourth engagement mechanisms 240 connect the upper case 912 and the lower case 914. A user can detach the lower case 914 from the upper case 912 by operating the four fourth engagement mechanisms 240. As shown in FIG. 37, four protrusions 922a to 922d that protrude downward are provided at four corners of the bottom surface 922.The four protrusions 922a to 922d are provided below the four recesses 921a to 921d of the upper surface 920, respectively. The four protrusions 922a to 922d have shapes corresponding to the four recesses 921a to 921d of the upper surface 920, respectively.

[0089] The procedure for connecting the power supply device 100 and the tool box 900 is similar to the procedure for connecting two power supply devices 100 vertically in that the four fourth engagement mechanisms 240 of the power supply device 100 are operated. First, the user places the tool box 900 on the power supply device 100 so that the four recessed portions 121a to 121d on the top surface 120 of the power supply device 100 are positioned below the four protrusions 922a to 922d (see FIG. 37) on the bottom surface 922 of the tool box 900. As a result, the four fourth engagement mechanisms 240 of the power supply device 100 are positioned below the lower coupling portion 221 of the tool box 900. The subsequent operation of the fourth engagement mechanisms 240 by the user is similar to the procedure for connecting two power supply devices 100 vertically described above. As a result, the four fourth engagement mechanisms 240 of the power supply device 100 engage with the four lower connecting portions 221 of the tool box 900, connecting the power supply device 100 and the tool box 900. According to the above configuration, the power supply device 100 and the tool box 900 can be carried in a state where they are lined up vertically. Furthermore, since the power supply device 100 and the tool box 900 can be stored lined up vertically, storage space can be used effectively. Note that in this embodiment, the tool box 900 is placed on the power supply device 100, but the power supply device 100 can also be placed on the tool box 900. In this case, the four fourth engagement mechanisms 240 of the tool box 900 engage with the four lower connecting portions 221 of the power supply device 100. When the power supply device 100 and the tool box 900 are connected, the first engagement mechanism 152 (see FIG. 6), the second engagement mechanism 172 (see FIG. 8), and the third engagement mechanism 192 (see FIG. 9) of the power supply device 100 are in a housed state.

[0090] (Power supply unit 100 placed on trolley 1000) In FIG. 33, the power supply unit 100 is placed on a trolley 1000. The trolley 1000 includes a support frame 1010 (see FIG. 38), a right wheel 1012, a left wheel 1014, and a handle 1016. The width of the support frame 1010 in the left-right direction is slightly smaller than the distance between the protrusion 122a (see FIG. 4) and the protrusion 122b (see FIG. 4) on the bottom surface 122 of the power supply unit 100. The handle 1016 includes a right pipe 1020 extending upward from the right end of the support frame 1010, a left pipe 1022 extending upward from the left end of the support frame 1010, and a grip 1024 connecting the upper ends of the right pipe 1020 and the left pipe 1022. A front support plate 1030 is provided at the front of the support frame 1010. A rear support plate 1032 is provided at the bottom of the right pipe 1020 and the bottom of the left pipe 1022. The distance in the front-to-rear direction between the front support plate 1030 and the rear support plate 1032 is slightly larger than the distance in the front-to-rear direction of the bottom surface 122 of the power supply device 100 (see FIG. 4).

[0091] When the bottom surface 122 (see FIG. 4) of the power supply unit 100 is placed on the support frame 1010 of the trolley 1000, the support frame 1010 is positioned between the right-side protrusions 122a and 122c (see FIG. 4) and the left-side protrusions 122b and 122d (see FIG. 4) of the bottom surface 122 of the power supply unit 100. Then, the lower part of the front surface 124 of the power supply unit 100 abuts against the front support plate 1030 of the trolley 1000, and the rear surface 126 (see FIG. 5) of the power supply unit 100 abuts against the rear support plate 1032 of the trolley 1000. This prevents the power supply unit 100 from falling off the trolley 1000 while the trolley 1000 is being moved.

[0092] (Power supply device 100 placed on cart 1200) In Fig. 34, the power supply device 100 is placed on a cart 1200. The cart 1200 is equipped with a support plate 1210, a right front wheel 1212, a left front wheel 1214, a right rear wheel (not shown), and a left rear wheel 1216. A recess 1210a having a shape corresponding to the bottom surface 122 of the power supply device 100 (see Fig. 4) is provided on the upper surface of the support plate 1210, and the power supply device 100 is placed in the recess 1210a. This prevents the power supply device 100 from falling off the cart 1200 while the cart 1200 is being moved.

[0093] In one or more embodiments, as shown in FIGS. 1, 3, and 17, the power supply device 100 includes a main case 110, a first engagement mechanism 152 (an example of a "first device-side engagement portion") provided on the main case 110, an AC output unit 314 (an example of a "first output unit") provided on the main case 110, and a device-side socket 372 (an example of an "device-side connector") to which a battery-side socket 544 (an example of a "battery-side connector") of a battery unit 500 (an example of a "first battery unit") is connected. The main case 110 includes a bottom surface 122 and an upper surface 120. The first engagement mechanism 152 engages with a first engagement mechanism 552 (an example of a "first unit-side engagement portion") of the battery unit 500, and the AC output unit 314 outputs power supplied from the battery unit 500 to a power tool (a "first external device") other than the battery unit 500. According to the above configuration, with the battery unit 500 placed on the top surface of the power supply device 100, the first engaging mechanism 152 of the power supply device 100 and the first engaged mechanism 552 of the battery unit 500 are engaged with each other. This couples the power supply device 100 and the battery unit 500 together. Furthermore, when the battery-side socket 544 and the device-side socket 372 are connected together and an external device is electrically connected to the AC output unit 314, power supplied from the battery unit 500 is output to the external device via the power supply device 100. Therefore, the power supply device 100 can output power to the external device using the power supplied from the battery unit 500.

[0094] Furthermore, in one or more embodiments, as shown in FIGS. 31 and 32 , the power supply device 100 is configured so that another power supply device 100 and a tool box 900 (an example of a “second external device”) can be placed on the top surface 120 of the main body case 110. According to the above configuration, when the battery unit 500 is not placed on the top surface 120 of the main body case 110, the other power supply device 100 and the tool box 900 can be placed on the top surface 120 of the main body case 110. Furthermore, the main body case 110 is configured so that it can be placed on the top surface 120 of the other power supply device 100 and the top surface 920 of the tool box 900. According to the above configuration, the power supply device 100 can be placed on the top surface 120 of the other power supply device 100 and the top surface 920 of the tool box 900. In this case, the power supply device 100, the other power supply device 100, and the tool box 900 can be carried or stored in a vertically stacked state. This improves user convenience.

[0095] 3, 12, and 35, the power supply device 100 further includes a fourth engagement mechanism 240 (an example of a "second device-side engagement portion") engageable with a lower coupling portion 221 (an example of an "device-side engagement portion") of another power supply device 100 and the tool box 900, and a lower coupling portion 221 (an example of an "device-side engagement portion") engageable with the fourth engagement mechanism 240 (an example of an "device-side engagement portion") of the other power supply device 100 and the tool box 900. According to the above configuration, the power supply device 100 is coupled to the other power supply device 100 and the tool box 900 by the fourth engagement mechanism 240 of the power supply device 100 engaging with the lower coupling portion 221 of the other power supply device 100 and the tool box 900, or by the fourth engagement mechanism 240 of the other power supply device 100 or the tool box 900 engaging with the lower coupling portion 221 of the power supply device 100. Therefore, when the power supply device 100 is carried in a state where it is stacked on top of another power supply device 100 and the tool box 900, it is possible to prevent the power supply device 100 from shifting position with the other power supply device 100 and the tool box 900.

[0096] 3 and 6, in one or more embodiments, the top surface 120 of the main body case 110 may have openings 120a, 120b (examples of "first grooves") that can accommodate the first engagement mechanisms 152. The first engagement mechanisms 152 are movable between an unhoused state in which they protrude upward from the top surface 120 and a housed state in which they are housed within the openings 120a, 120b. When the first engagement mechanisms 152 are in the unhoused state, the first engagement mechanisms 152 engage with the first engaged mechanisms 552 of the battery unit 500, and are in the housed state when other power supply devices 100 and toolboxes 900 are placed on the top surface 120 of the main body case 110. For example, in a configuration in which the first engagement mechanism 152 is fixed in the unhoused state, if another power supply device 100 and tool box 900 are placed on the top surface 120 of the main body case 110, the first engagement mechanism 152 may come into contact with the underside of the other power supply device 100 and tool box 900, potentially damaging the underside of the other power supply device 100 and tool box 900. According to the above configuration, when the other power supply device 100 and tool box 900 are placed on the top surface 120 of the main body case 110, the first engagement mechanism 152 is housed in the openings 120a, 120b. Therefore, damage to the underside of the other power supply device 100 and tool box 900 can be prevented.

[0097] 6, the power supply device 100 further includes a torsion spring 154 (an example of a "biasing member") that biases the first engagement mechanism 152 from the housed state to the unhoused state. With the above configuration, the user does not need to perform an operation to switch the first engagement mechanism 152 from the housed state to the unhoused state when attempting to connect the power supply device 100 and the battery unit 500. This improves user convenience.

[0098] 2, 3, and 9, the power supply device 100 further includes a third engaging mechanism 192 (an example of a "third device-side engaging portion") that can engage with a third engaged mechanism 750 (an example of a "second unit-side engaged portion") of a battery unit 700 that is different from the battery unit 500. According to the above configuration, by utilizing the third engaging mechanism 192, the battery unit 700, which has a different shape from the battery unit 500, can be connected to the power supply device 100. This improves user convenience.

[0099] In one or more embodiments, as shown in FIGS. 3, 6, and 9, the top surface 120 of the main body case 110 has openings 120a and 120b capable of accommodating the first engagement mechanism 152 and an opening 120c (an example of a "second groove") capable of accommodating the third engagement mechanism 192. The first engagement mechanism 152 is movable between an unaccommodated state and an accommodated state. The third engagement mechanism 192 is movable between an unaccommodated state (an example of a "third state") in which it protrudes upward from the top surface 120 and an accommodated state (an example of a "fourth state") in which it is accommodated within the opening 120c. The first engagement mechanism 152 engages with the first engaged mechanism 552 of the battery unit 500 when the first engagement mechanism 152 is in the unaccommodated state. The third engagement mechanism 192 engages with the third engaged mechanism 750 of the battery unit 700 when the third engagement mechanism 192 is in the unhoused state, and is positioned in the housed state when the first engagement mechanism 152 engages with the first engaged mechanism 552 of the battery unit 500. For example, in a configuration in which the third engagement mechanism 192 is fixed in the unhoused state protruding upward from the upper surface 120 of the main body case 110, when the battery unit 500 is placed on the upper surface 120 of the main body case 110, the third engagement mechanism 192 and the underside of the battery unit 500 may come into contact, potentially damaging the underside of the battery unit 500. According to the above configuration, when the battery unit 500 is placed on the upper surface 120 of the main body case 110, the third engagement mechanism 192 is housed in the opening 120c. This prevents damage to the underside of the battery unit 500.

[0100] 6, the power supply device 100 further includes a torsion spring 154 that biases the first engagement mechanism 152 from the housed state to the unhoused state. With the above configuration, the user does not need to perform an operation to switch the first engagement mechanism 152 from the housed state to the unhoused state when attempting to connect the power supply device 100 and the battery unit 500. This improves user convenience.

[0101] 13, power supply device 100 further includes an AC circuit section 430 (an example of a "first conversion circuit") connected to AC output section 314 and converting the power supplied from battery unit 500, a DC output section 316 (an example of a "second output section"), and a DC circuit section 432 (an example of a "second conversion circuit") connected to DC output section 316 and converting the power supplied from battery unit 500. With the above configuration, multiple types of electrical equipment can be operated using the power output from power supply device 100. This improves user convenience.

[0102] 13, power supply device 100 further includes an AC circuit section 430 that is connected to AC output section 314 and converts the DC current supplied from battery unit 500 into AC current. With the above configuration, a user can use power supply device 100 to operate electrical devices that operate using AC power. This improves user convenience.

[0103] In one or more embodiments, as shown in FIG. 17 , the main body case 110 further includes a rear surface 126 (an example of a “first side surface”) disposed between the top surface 120 and the bottom surface 122. The device-side socket 372 is provided on the rear surface 126. For example, if the device-side socket 372 is provided on the top surface 120 of the main body case 110, the battery unit 500 fixed to the top surface 120 of the main body case 110 gets in the way, making it difficult to connect the device-side socket 372 and the battery-side socket 544. With the above configuration, the user can easily connect the device-side socket 372 and the battery-side socket 544.

[0104] Furthermore, in one or more embodiments, as shown in FIG. 17 , when the battery-side socket 544 of the battery unit 500 is connected to the device-side socket 372, the battery-side socket 544 is positioned inside the outer periphery of the main body case 110 when the power supply device 100 is viewed from above. If the battery-side socket 544 is positioned outside the outer periphery of the main body case 110 when the power supply device 100 is viewed from above, the battery-side socket 544 may collide with a wall or the like and be damaged. With the above configuration, the battery-side socket 544 is prevented from colliding with a wall or the like. Therefore, damage to the battery-side socket 544 can be prevented.

[0105] 17 , the main body case 110 further includes a cable housing 380 attached to the rear surface 126, which houses a cable 542 extending from the battery-side socket 544. When the power supply device 100 is transported while the battery unit 500 is fixed to the power supply device 100, the cable 542 of the battery unit 500 may come into contact with the user. According to the above configuration, when the battery unit 500 is fixed to the power supply device 100, the cable 542 can be housed in the cable housing 380. Therefore, when the power supply device 100 is transported, it is possible to prevent the cable 542 of the battery unit 500 from coming into contact with the user.

[0106] 3 and 4, in one or more embodiments, the main body case 110 further includes a right side 128 and a left side 130 (examples of "second sides") disposed between the top side 120 and the bottom side 122, and a right handle 340 and a left handle 350 that can be gripped by a user. The right side 128 and the left side 130 are provided with right handle storage portions 128a and left handle storage portions 130a that are recessed into the inside of the main body case 110 and that store the right handle 340 and the left handle 350. The right handle 340 and the left handle 350 are movable between a stored state in which they are stored in the right handle storage portion 128a and the left handle storage portion 130a, and an unstored state in which they are not stored in the right handle storage portion 128a and the left handle storage portion 130a. According to the above configuration, when the user carries the power supply device 100, the user moves the right handle 340 and the left handle 350 to the unfolded state, and when the power supply device 100 is placed on the ground or the like, the user moves the right handle 340 and the left handle 350 to the unfolded state. Collect can be moved to a CollectionIn this state, the right handle 340 and the left handle 350 are housed in the right handle housing portion 128a and the left handle housing portion 130a. Therefore, when the power supply device 100 is placed on the ground or the like, it is possible to prevent the right handle 340 and the left handle 350 from coming into contact with the user.

[0107] In one or more embodiments, as shown in FIG. 4, an exhaust hole 128b (an example of an "air vent") is provided on the right side 128 of the main body case 110. When the power supply device 100 is viewed from a direction perpendicular to the right side 128, the exhaust hole 128b may be provided on the inside of the right handle 340. With the above configuration, the right handle 340 does not obstruct the flow of air exhausted from the main body case 110 to the outside. This makes it easier for air to be exhausted from the main body case 110 to the outside.

[0108] In one or more embodiments, as shown in FIG. 4 , the main body case 110 may further include a waterproof wall 280 (an example of an “inclined portion”) that protrudes forward (an example of a “first direction”) from a front end (an example of a “first end”) of the top surface 120, with the front end sloping downward. The waterproof wall 280 is provided with a display unit 282 and an AC power switch 286 (an example of an “output operation unit”) for operating the AC output unit 314. A configuration in which the display unit 282 is provided on the waterproof wall 280 can improve the user's visibility of the display unit 282 compared to a configuration in which the display unit 282 is provided on the top surface 120 of the main body case 110 or a side surface perpendicular to the top surface 120. Furthermore, a configuration in which the AC power switch 286 is provided on the waterproof wall 280 can improve the user's operability of the AC power switch 286 compared to a configuration in which the AC power switch 286 is provided on the top surface 120 of the main body case 110 or a side surface perpendicular to the top surface 120.

[0109] Furthermore, in one or more embodiments, as shown in FIG. 4 , main body case 110 further includes front surface 124 (an example of a "third side surface") that extends downward from the front end of top surface 120 and on which AC output unit 314 is provided. AC output unit 314 is located below display unit 282 and AC power switch 286. According to the above configuration, waterproof wall 280 is located above AC output unit 314. Furthermore, waterproof wall 280 protrudes further forward than AC output unit 314. Therefore, waterproof wall 280 can prevent water from above power supply device 100 from reaching AC output unit 314.

[0110] In one or more embodiments, as shown in FIG. 1 , when the battery unit 500 is placed on the top surface 120 of the main body case 110, a main power switch 532 (an example of a "power operation unit") is provided on the front surface 524 of the battery unit 500. When the user operates the main power switch 532, power is supplied from the battery unit 500 to the power supply device 100. According to the above configuration, when the battery unit 500 is placed on the top surface 120 of the main body case 110, both the AC power switch 286 of the power supply device 100 and the main power switch 532 of the battery unit 500 are located on the front side. This improves user operability.

[0111] 4, AC output unit 314 is provided with AC protector 322 that protects AC output unit 314. This configuration can prevent water from reaching AC output unit 314.

[0112] (First Modification) In the above embodiment, as shown in FIG. 20, the battery unit 500 has the cable 542, but the power supply device 100 may have the cable.

[0113] (Second Modification) Only the battery units 500, 700 may be placed on the upper surface 120 of the power supply device 100, and other power supply devices 100, tool boxes 900, etc. may not be placed on the upper surface 120 of the power supply device 100. In this modification, the upper coupling portion 220 (more specifically, the fourth engagement mechanism 240) and the lower coupling portion 221 may be omitted. Furthermore, in another modification, other power supply devices 100, tool boxes 900, etc. may be placed on the upper surface 120 of the power supply device 100, but it is not necessary that the power supply device 100 be placed on the upper surface 120 of the other power supply devices 100 or the upper surface 920 of the tool box 900.

[0114] (Third Modification) The power supply device 100 may not have one of the upper connecting portion 220 (more specifically, the fourth engagement mechanism 240) and the lower connecting portion 221. If the power supply device 100 does not have the upper connecting portion 220, the other power supply devices 100 and the tool box 900 may not have the lower connecting portion 221, and if the power supply device 100 does not have the lower connecting portion 221, the other power supply devices 100 and the tool box 900 may not have the upper connecting portion 220 (more specifically, the fourth engagement mechanism 240).

[0115] (Fourth Modification) As shown in FIG. 40 , in a power supply device 1300 of this modification, four lower connecting portions 1320 are provided at the lower end of the main body case 1310, and four upper connecting portions 1321 are provided at the upper end of the main body case 1310. The four lower connecting portions 1320 are provided at both left and right ends of the front face 124, the rear end of the right face 128, and the rear end of the left face 130. The four lower connecting portions 1320 are provided in different positions and directions, but have the same shape. The lower connecting portions 1320 of this modification and the upper connecting portion 220 of the embodiment (see FIG. 10 ) are provided in positions and shapes that are symmetrical to each other. Each of the four upper connecting portions 1321 is provided above the four lower connecting portions 1320. The four upper connecting portions 1321 are provided in different positions and directions, but have the same shape. Furthermore, the upper coupling portion 1321 of this modified example and the lower coupling portion 221 of the embodiment (see FIG. 10) are vertically symmetrical in position and shape to each other. As shown in FIG. 39, a fourth engagement mechanism 1340 is attached to each of the four lower coupling portions 1320. The four fourth engagement mechanisms 1340 are provided in different positions and directions but have the same shape. The fourth engagement mechanism 1340 of this modified example and the fourth engagement mechanism 240 of the embodiment (see FIG. 3) are vertically symmetrical in position and shape to each other. In this modified example, the fourth engagement mechanism 1340 and the upper coupling portion 1321 are examples of a "second device-side engagement portion" and a "device-side engaged portion," respectively. In a further modified example, the power supply device 1300 may not have one of the lower coupling portion 1320 (specifically, the fourth engagement mechanism 1340) and the upper coupling portion 1321.

[0116] (Fifth Modification) The first engagement mechanism 152 that connects the power supply device 100 and the battery unit 500 may be used to connect the power supply device 100 to another power supply device 100 or a tool box 900.

[0117] (Sixth Modification) At least one of the first engagement mechanism 152, the second engagement mechanism 172, and the third engagement mechanism 192 may be fixed in an unhoused state. For example, when the first engagement mechanism 152 is fixed in an engaged state, the openings 120a, 120b may not be provided in the top surface 120. In this case, the power supply device 100 may be configured to be connectable to another power supply device 100 and a tool box 900 using the first engagement mechanism 152.

[0118] (Seventh Modification) At least one of the first engagement mechanism 152 and the second engagement mechanism 172 does not have to include the torsion spring 154, 174.

[0119] (Eighth Modification) Only one of the battery unit 500 and the battery unit 700 may be mountable on the upper surface 120 of the power supply device 100. For example, if only the battery unit 500 can be mounted on the upper surface 120, the third engagement mechanism 192 can be omitted. Furthermore, for example, if only the battery unit 700 can be mounted on the upper surface 120, the second engagement mechanism 172 can be omitted.

[0120] (Ninth Modification) The power supply device 100 may have only one output unit, or may have four or more output units. For example, the power supply device 100 may have only the DC output unit 316.

[0121] (Tenth Modification) The device-side socket 372 of the power supply device 100 may be provided on the front surface 124, right surface 128, or left surface 130 of the main body case 110. In another modification, the device-side socket 372 of the power supply device 100 may be provided on the top surface 120 of the main body case 110.

[0122] (Eleventh Modification) The power supply device 100 does not have to have the cable housing portion 380.

[0123] (Twelfth Modification) The power supply device 100 does not necessarily have to have at least one of the right handle housing portion 128a and the left handle housing portion 130a.

[0124] (Thirteenth Modification) An exhaust hole 128b may be provided on the outside of the right handle 340.

[0125] (Fourteenth Modification) Power supply device 100 does not have to include waterproof wall 280. In this modification, display unit 282, USB power switch 284, AC power switch 286, frequency selector switch 288, and DC power switch 290 may be provided on top surface 120, front surface 124, rear surface 126, right surface 128, or left surface 130 of main body case 110. In another modification, AC output unit 314 may be provided above display unit 282, USB power switch 284, AC power switch 286, frequency selector switch 288, and DC power switch 290.

[0126] (Fifteenth Modification) A main power switch 532 may be provided on the top surface 520, the rear surface 526, the right surface 528, or the left surface 530 of the battery unit 500.

[0127] (16th Modification) The power supply device 100 may have a main power switch for switching the main power supply of the power supply device 100 on and off.

[0128] (Seventeenth Modification) The power supply device 100 does not have to include at least one of the USB protector 320, the AC protector 322, and the DC protector 324.

[0129] (18th Variation) The "first external device" is not limited to a power tool, but may be an electrical device (e.g., a microwave oven) that can be placed on the power supply unit 100 and / or that is configured so that the power supply unit 100 can be placed on its upper surface. [Explanation of symbols]

[0130] 2: power supply system, 100: power supply device, 110: main body case, 112: upper case, 114: lower case, 120: top surface, 120a: opening, 120b: opening, 120c: opening, 120d: opening, 120e: opening, 122: bottom surface, 122a: protrusion, 122b: protrusion, 122c: protrusion, 122d: protrusion, 124: front surface, 126: rear surface, 128: right surface, 128a: right handle housing, 128b: exhaust hole, 130: left surface, 130a: left handle housing, 130b: intake hole, 140: first connecting mechanism, 142: second connecting mechanism, 144: third connecting mechanism , 150: first connecting case, 152: first engaging mechanism, 154: spring, 156: base, 158: first protrusion, 160: second protrusion, 162: rotating shaft, 170: second connecting case, 172: second engaging mechanism, 174: spring, 176: base, 178: protrusion, 178a: upper surface, 178b: lower surface, 180: rotating shaft, 190: third connecting case, 192: third engaging mechanism, 194: front plate, 196: first right plate, 196a: engaging protrusion, 198: first left plate, 198a: engaging protrusion, 200: rotating shaft, 202: upper plate, 204: bottom plate, 206: second right plate, 208: 2nd left plate part, 210: Center plate part, 212: Protruding plate part, 214: Protruding plate part, 220: Upper connecting part, 220a: Bottom surface, 220b: Rear surface, 220 c: Right side, 220d: Left side, 221: Lower connecting part, 222a: Projection, 222b: Projection, 222c: Projection, 222d: Projection, 224: Right groove, 226: Left groove, 228a: Top surface, 228b: Rear surface, 228c: Right surface, 228d: Left surface, 230a: Projection, 230b: Projection, 240: Fourth engagement mechanism, 242: Front plate, 244: Top plate, 246: Bottom plate, 248: Right plate, 250: Left plate, 252: First rotation axis, 2 54: second rotating shaft, 256: central plate portion, 258: first connecting plate portion, 260: second connecting plate portion, 262: right side convex portion, 264: left side convex portion, 280: waterproof wall, 280a: top surface, 282: display portion, 284: USB power switch, 286: AC power switch, 288: frequency changeover switch, 290: DC power switch, 292: buzzer switch, 294: buzzer, 310: output unit, 312: USB output portion, 314: AC output portion, 316: DC output portion, 320: USB protection portion, 322: AC protection portion, 324: DC protection portion, 340: right side handle, 342: front support portion,344: rear support part, 346: grip part, 350: left handle, 352: front support part, 354: rear support part, 356: grip part, 370: socket IF part, 370a: front face, 370b: right face, 370c: left face, 372: device side socket part, 372a: central axis, 374: socket protection part, 380: cable accommodation part, 382: pocket, 382a: rear plate part, 382b: right plate part, 382c: left plate part, 382d: bottom plate part, 384: recessed part, 384a: front face, 384b: right face, 384c: left face, 400: intake duct, 402: exhaust duct, 404: board case, 40 6: Control board, 408: Cooling fan, 420: Control circuit, 422: Microcomputer, 424: Regulator, 426: Voltage detection circuit, 428: USB circuit section, 430: AC circuit section, 432: DC circuit section, 434: Switch circuit, 436: Step-down power supply circuit, 438: Switch circuit, 440: Step-up power supply circuit, 442: Inverter circuit, 444: Switch circuit, 446: Step-down power supply circuit, 500: Battery unit, 510: Battery case, 512: Upper case, 514: Lower case, 520: Top, 522: Bottom, 524: Front, 526: Rear, 528: Right side, 53 0: left surface, 532: main power switch, 540: recessed portion, 540a: top surface, 540b: first left surface, 540c: second left surface, 540d: connection surface, 542: cable, 542a: one end, 542b: other end, 544: battery side socket portion, 550: protrusion, 552: first engaged mechanism, 560: protrusion, 562: locking mechanism, 564: base, 566: operation portion, 568: second engaged mechanism, 568a: top surface, 568b: bottom surface, 570: rotation shaft, 700: battery unit, 710: battery case, 712: upper case, 714: lower case, 720: top surface, 722 : Bottom, 724: Front, 726: Rear, 728: Right, 730: Left, 732: Main power switch, 740: Battery handle, 742: Front support, 744: Rear support, 746: Grip, 750: Third engaged mechanism, 750a: Top, 750b: Rear, 750c: Right, 7 50d: left surface, 752a: protrusion, 752b: protrusion, 760: cable connection section, 762: first engaged mechanism, 762a: top surface, 762b: left surface, 762c: front surface, 762d: rear surface, 762e: extension section, 900: tool box, 910: tool case, 912: upper case,914: Lower case, 920: Top, 922: Bottom, 924: Front, 920a: Handle housing, 926: Rear, 928: Right side, 930: Left side, 940: Handle, 942: Right side support, 944: Left side support, 946: Grip, 1000: Trolley, 1010: Support frame, 1012: Right wheel, 1014: Left wheel, 1016: Handle, 1020: Right side pipe, 1022: Left side pipe type, 1024: gripping portion, 1030: front support plate, 1032: rear support plate, 1200: cart, 1210: support plate, 1210a: recess, 1212: right front wheel, 1214: left front wheel, 1216: left rear wheel, a: type, c: type, α: predetermined angle, 1300: power supply unit, 1310: main body case, 1320: lower connecting portion, 1321: upper connecting portion, 1340: fourth engagement mechanism,

Claims

1. 1. A power supply device, comprising: The main body case and a first device-side engaging portion provided on the main body case; a first output section provided in the main body case; an apparatus-side connector to which a battery-side connector of the first battery unit is connected; Equipped with The main body case includes: The bottom and an upper surface on which the first battery unit can be placed, the first device-side engaging portion engages with a first unit-side engaged portion of the first battery unit; the first output unit outputs the power supplied from the first battery unit to a first external device different from the first battery unit; a second external device different from the first battery unit can be placed on the top surface of the main body case, and / or the main body case can be placed on the top surface of the second external device, The power supply device further comprises: a second device-side engaging portion that is engageable with the device-side engaged portion of the second external device and is different from the first device-side engaging portion, and / or a device-side engaged portion that is engageable with the device-side engaging portion of the second external device; power supply.

2. 1. A power supply device, comprising: The main body case and a first device-side engaging portion provided on the main body case; a first output section provided in the main body case; an apparatus-side connector to which a battery-side connector of the first battery unit is connected; Equipped with The main body case includes: The bottom and an upper surface on which the first battery unit can be placed, the first device-side engaging portion engages with a first unit-side engaged portion of the first battery unit; the first output unit outputs the power supplied from the first battery unit to a first external device different from the first battery unit; a second external device different from the first battery unit can be placed on the top surface of the main body case, and / or the main body case can be placed on the top surface of the second external device, the upper surface has a first groove capable of accommodating the first device-side engaging portion; the first device-side engaging portion is movable between a first state in which it protrudes upward from the upper surface and a second state in which it is accommodated in the first groove portion, The first device-side engaging portion When the first device-side engaging portion is in the first state, the first device-side engaging portion engages with the first unit-side engaged portion of the first battery unit, The second external device is in the second state when the second external device is placed on the top surface of the main body case. power supply.

3. The power supply device further comprises:

3. The power supply device according to claim 2, further comprising a biasing member that biases the first device-side engaging portion from the second state to the first state.

4. 1. A power supply device, comprising: The main body case and a first device-side engaging portion provided on the main body case; a first output section provided in the main body case; an apparatus-side connector to which a battery-side connector of the first battery unit is connected; Equipped with The main body case includes: The bottom and an upper surface on which the first battery unit can be placed, the first device-side engaging portion engages with a first unit-side engaged portion of the first battery unit; the first output unit outputs the power supplied from the first battery unit to a first external device different from the first battery unit; The power supply device further comprises: a third device-side engaging portion that is engageable with a second unit-side engaged portion of a second battery unit that is different from the first battery unit and that is different from the first device-side engaging portion; the upper surface has a first groove capable of accommodating the first device-side engaging portion and a second groove capable of accommodating the third device-side engaging portion, the first device-side engaging portion is movable between a first state in which it protrudes upward from the upper surface and a second state in which it is accommodated in the first groove portion, the third device-side engaging portion is movable between a third state in which it protrudes upward from the upper surface and a fourth state in which it is accommodated in the second groove portion, The first device-side engaging portion When the first device-side engaging portion is in the first state, the first device-side engaging portion engages with the first unit-side engaged portion of the first battery unit, The third device-side engaging portion the third device-side engaging portion engages with the second unit-side engaged portion of the second battery unit when the third device-side engaging portion is in the third state; the first device-side engaging portion is in the fourth state when engaged with the first unit-side engaged portion of the first battery unit; power supply.

5. The power supply device further comprises:

5. The power supply device according to claim 4, further comprising a biasing member that biases the first device-side engaging portion from the second state to the first state.

6. 1. A power supply device, comprising: The main body case and a first device-side engaging portion provided on the main body case; a first output section provided in the main body case; an apparatus-side connector to which a battery-side connector of the first battery unit is connected; Equipped with The main body case includes: The bottom and an upper surface on which the first battery unit can be placed, the first device-side engaging portion engages with a first unit-side engaged portion of the first battery unit; the first output unit outputs the power supplied from the first battery unit to a first external device different from the first battery unit; The main body case further includes: a first side disposed between the top surface and the bottom surface; The device-side connector is provided on the first side surface. power supply.

7. 7. The power supply device according to claim 6, wherein when the battery-side connector of the first battery unit is connected to the device-side connector, the battery-side connector is positioned inside the outer peripheral edge of the main body case when the power supply device is viewed from above.

8. The main body case further includes:

8. The power supply device according to claim 6, further comprising a cable housing portion attached to the first side surface and housing a cable extending from the battery-side connector.

9. 1. A power supply device, comprising: The main body case and a first device-side engaging portion provided on the main body case; a first output section provided in the main body case; an apparatus-side connector to which a battery-side connector of the first battery unit is connected; Equipped with The main body case includes: The bottom and an upper surface on which the first battery unit can be placed, the first device-side engaging portion engages with a first unit-side engaged portion of the first battery unit; the first output unit outputs the power supplied from the first battery unit to a first external device different from the first battery unit; The main body case further includes: a sloped portion protruding in a first direction from a first end of the upper surface, the end of which is inclined downward; the inclined portion is provided with a display portion and an output operation portion for operating the first output portion, a power supply operation unit is provided on a battery side surface of the first battery unit on the first direction side when the first battery unit is placed on the top surface of the main body case, When the power supply operation unit is operated by a user, power is supplied from the first battery unit to the power supply device. power supply.

10. The power supply device further comprises: A power supply device as described in any one of claims 1 to 3 and 6 to 9, comprising a third device-side engaging portion that is capable of engaging with a second unit-side engaging portion of a second battery unit that is different from the first battery unit and that is different from the first device-side engaging portion.

11. The power supply device further comprises: a first conversion circuit connected to the first output section and configured to convert power supplied from the first battery unit; a second output different from the first output; 11. The power supply device according to claim 1, further comprising: a second conversion circuit connected to the second output section and converting the power supplied from the first battery unit, the second conversion circuit being different from the first conversion circuit.

12. A power supply device as described in claim 11, wherein the first conversion circuit is connected to the first output section and converts direct current supplied from the first battery unit into alternating current.

13. The power supply device further comprises:

11. The power supply device according to claim 1, further comprising a first conversion circuit connected to the first output section and configured to convert a direct current supplied from the first battery unit into an alternating current.

14. The main body case further includes: a second side disposed between the top surface and the bottom surface; a handle provided on the second side and capable of being gripped by a user; a handle accommodating portion that is recessed into the main body case and that accommodates the handle is provided on the second side surface; The handle is movable between a storage state in which it is stored in the handle storage portion and a non-storage state in which it is not stored in the handle storage portion.

14. A power supply device according to any one of claims 1 to 13.

15. a ventilation hole is provided on the second side surface of the main body case, The power supply unit according to claim 14 , wherein the vent hole is provided inside the handle when the power supply unit is viewed in a direction perpendicular to the second side surface.

16. The main body case further includes: a sloped portion protruding in a first direction from a first end of the upper surface, the end of which is inclined downward; The power supply device according to any one of claims 1 to 8 and claims 10 to 15 not dependent on claim 9, wherein the inclined portion is provided with a display unit and an output operation unit for operating the first output unit.

17. The main body case further includes: a third side surface extending downward from the first end of the top surface, the third side surface having the first output portion provided thereon; The power supply device according to claim 16 , wherein the first output section is located below the display section and the output operation section.

18. The power supply device according to claim 1 , wherein the first output section is provided with a protection section that protects the first output section.

19. A power supply system including a power supply device and a first battery unit, The first battery unit includes: A battery case; A battery side connector; a first unit side engaged portion, The power supply device The main body case and a first device-side engaging portion provided on the main body case and engaging with the first unit-side engaged portion; a first output unit provided in the main body case and configured to output power supplied from the first battery unit to a first external device different from the first battery unit; an apparatus-side connector to which the battery-side connector is connected; Equipped with The main body case includes: The bottom and an upper surface on which the first battery unit can be placed, the power supply device is configured so that a second external device different from the first battery unit can be placed on the top surface of the main body case, and / or the main body case can be placed on the top surface of the second external device, The power supply device further comprises: a second device-side engaging portion that is engageable with the device-side engaged portion of the second external device and is different from the first device-side engaging portion, and / or a device-side engaged portion that is engageable with the device-side engaging portion of the second external device; Power supply system.

20. A power supply system including a power supply device and a first battery unit, The first battery unit includes: A battery case; A battery side connector; a first unit side engaged portion, The power supply device The main body case and a first device-side engaging portion provided on the main body case and engaging with the first unit-side engaged portion; a first output unit provided in the main body case and configured to output power supplied from the first battery unit to a first external device different from the first battery unit; an apparatus-side connector to which the battery-side connector is connected; Equipped with The main body case includes: The bottom and an upper surface on which the first battery unit can be placed, The main body case further includes: a first side disposed between the top surface and the bottom surface; The device-side connector is provided on the first side surface. Power supply system.

Images