JP2016018604A - Power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an impact applied on an inner cell by effectively absorbing an impact caused by the drop of a power supply device.SOLUTION: A power supply device according to the present invention is a power supply device capable of supplying power charged in a plurality of cells to an electric work machine. The power supply device includes a box-like inner case 41 for housing the plurality of cells therein, and a box-like outer case 31 for housing the inner case 41 therein. A support part of the outer case 31 supporting the inner case 41 is provided at a position at least other than a corner of the outer case 31.SELECTED DRAWING: Figure 15

Description

  The present invention relates to a power supply device that can supply electric power of a plurality of cells to an electric working machine.

  Patent Document 1 describes a power supply device that supplies electric power charged in a cell to an electric working machine such as a pruning shears or a hedge clipper. As shown in FIG. 31, the power supply device of Patent Document 1 includes a backpack-type power back 100 made of cloth. A battery pack 102 having cells in the power supply back 100, a mounting unit 104 configured to be slidably mountable with the battery pack 102, and a controller 105 are housed. The controller 105 is provided with an output connector 106 to which a relay cord (not shown) such as a pruning shear is connected. With the above configuration, the power of the battery pack 102 can be supplied to the pruning shears or the like while the relay cord such as the pruning shears is connected to the output connector 106 of the controller 105.

JP 2011-216304 A

  The power supply apparatus described above is configured to store the battery pack 102 and the like in the cloth power supply bag 100. For this reason, for example, when the power supply apparatus is accidentally dropped, the cloth power supply bag 100 cannot sufficiently absorb the impact, and a large impact is applied to the battery pack 102 and the cell. In particular, in the case of the battery pack 102 containing a large number of cells, the weight increases and the impact applied to the battery pack 102 also increases, causing a failure.

  The present invention has been made to solve the above-described problems, and the problem to be solved by the present invention is to add to the internal cell so that the impact when the power supply device falls can be effectively absorbed. To reduce the impact.

The above-described problems are solved by the inventions of the claims.
Invention of Claim 1 is a power supply device which can supply electric power of a plurality of cells to an electric work machine, and is a box-shaped inner case which stores the plurality of cells, and a box shape which stores the inner case An outer case, and the support portion of the outer case that supports the inner case is provided at a position other than at least a corner portion of the outer case.

  According to the present invention, the support part of the outer case that supports the inner case that houses the cell is provided at least at a position other than the corner of the outer case. For this reason, the support part which supports an inner case, a rib, etc. are not provided inside the corner | angular part of an outer case, but it is a space. Therefore, when the power supply device falls and the corner portion of the outer case collides with the floor surface, the corner portion of the outer case is bent to absorb the impact to some extent. Further, since the bending of the corner portion of the outer case is absorbed in the space, the impact applied to the corner portion of the outer case does not directly apply to the inner case. For this reason, the impact applied to the cell accommodated in the inner case can be suppressed.

  According to the invention of claim 2, the inner case is constituted by an inner case main body portion and an inner case lid for closing the opening of the inner case main body portion, and the outer case is constituted by the outer case main body portion and the outer case. An outer case lid that closes the opening of the main body, and the support portion of the outer case that supports the inner case is other than the side wall of the outer case where the outer case main body and the outer case lid are aligned. It is provided in the position. For this reason, the side wall of the outer case and the side wall of the inner case are not connected, and there is a space between the side wall of the outer case and the side wall of the inner case. Therefore, even if the power supply device falls and the side wall of the outer case is bent due to an impact, the bending is absorbed by the space and no direct impact is applied to the inner case.

  According to the invention of claim 3, the outer case lid of the outer case and the inner case lid of the inner case are integrated in a state where the top plate portions are connected to each other. For this reason, the top plate portion of the inner case lid is supported by the top plate portion of the outer case lid.

  According to the invention of claim 4, the side wall of the outer case and the side wall of the inner case are provided in parallel at positions other than the corners of the outer case, and at the corners of the outer case, The side wall is further away from the side wall of the inner case and becomes non-parallel. That is, since the space at the corner of the outer case is wider than the space other than the corner, the shock absorbing performance at the corner of the outer case is higher than the shock absorbing performance at the corner other than the corner.

  According to the invention of claim 5, the gap dimension between the side wall of the outer case and the side wall of the inner case is set to a larger value at the corner portion of the outer case than the position other than the corner portion of the outer case. . For this reason, the impact absorption performance of the corner | angular part of an outer case improves.

  According to invention of Claim 6, the side wall which comprises the corner | angular part of an inner case is formed in the plane arc shape, The clearance gap dimension between the side wall of the inner case of the said plane arc shape and the side wall of the said outer case is as follows. It is set to a value larger than the gap dimension between the side wall other than the corner portion of the inner case and the side wall of the outer case.

  According to the invention of claim 7, the cell is housed in the inner case so that a wide space is provided on the inner case lid side. For this reason, even if the inner case lid of the inner case is bent by an impact, the cells in the inner case are not easily affected by the bending of the inner case lid.

  According to the invention of claim 8, in the inner case, together with the cell, a substrate of a protection circuit that monitors the voltage of the cell and a heat radiating plate that radiates electric components on the substrate are housed. It is provided on the inner case lid side. For this reason, even if the inner case lid of the inner case is bent by an impact, the impact can be absorbed to some extent by the heat radiating plate by the inner case lid hitting the heat radiating plate.

According to the present invention, it is possible to effectively absorb the impact when the power supply device is dropped, and the impact applied to the internal cell can be reduced.

1 is an overall perspective view of a power supply device according to a first embodiment of the present invention. It is the schematic showing the electric circuit of the said power supply device. It is a perspective view showing the apparatus main-body part, an adapter, etc. of the said power supply device. It is a side view of the said apparatus main-body part. It is a perspective view showing the state which removed the outer case cover of the said apparatus main-body part. It is a disassembled perspective view of the said apparatus main-body part. It is a perspective view showing the leg part of the device main part. It is VIII-VIII arrow sectional drawing of FIG. It is IX-IX arrow sectional drawing of FIG. It is a perspective view of the part which the stabilizer hook of the said apparatus main body part hangs. It is a perspective view of the receiving rod which the stabilizer hook of the said apparatus main body part hangs. It is a decomposition | disassembly longitudinal cross-sectional view (XII-XII arrow sectional drawing of FIG. 6) of the said apparatus main-body part. It is a longitudinal cross-sectional view of the said apparatus main-body part. It is the XIV enlarged view of FIG. It is the top view which looked at the outer case cover of the said apparatus main-body part, and the inner case cover from the inner side. It is a perspective view showing the remaining capacity display lens and push button attached to the inner case lid. It is the perspective view which looked at the inner side of an outer case lid in the state where the inner case main-body part was screwed to the inner case lid. It is a perspective view showing the screwing structure etc. of the said outer case main-body part and an inner case main-body part. It is a perspective view showing the screwing structure of the said outer case main-body part and an outer case cover. It is a longitudinal cross-sectional view showing the attachment structure of a main switch. It is a longitudinal cross-sectional view showing the attachment structure of a connector. It is a longitudinal cross-sectional view showing a waterproof clamp. It is a schematic diagram showing the electrical connection and planar arrangement | positioning of a cell. It is a disassembled perspective view of a cell holder. It is a disassembled perspective view of a cell holder. It is a perspective view showing arrangement | positioning of the inner case main-body part accommodated in the said outer case main-body part, the cell holder accommodated in the inner case main-body part, and an auxiliary | assistant board | substrate. It is detail drawing showing the connection structure of the lead plate of a cell holder, an auxiliary substrate, and a main body board | substrate. It is a side view showing the fitting state with a cell holder and the inner side wall of an inner case main-body part (cell storage part). It is a perspective view showing the inner case main-body part accommodated in the said outer case main-body part, and the main body board | substrate accommodated in the cell storage part of the inner case main-body part. It is a perspective sectional view showing the relationship with a cell holder, an auxiliary board, a main part board, etc. It is a side view showing the conventional power supply device.

[Embodiment 1]
Hereinafter, the power supply apparatus 10 according to the first embodiment of the present invention will be described with reference to FIGS. The power supply device 10 according to the present embodiment is a device that supplies electric power of a cell to an electric blower 3 that is an electric working machine, and is configured to be carried by an operator.
Here, front and rear, right and left, and upper and lower shown in the figure correspond to front and rear, right and left, and top and bottom in a state where the device main body 20 of the power supply device 10 is erected (backed state).

<About Outline of Power Supply Device 10>
As illustrated in FIG. 1, the power supply device 10 includes a device main body 20, a harness 11 including a shoulder belt 12, a waist belt 13, and a back plate portion 14 for carrying the device main body 20, and a device main body 20. And an adapter 16 for connecting the output cable 21 to the electric blower 3. The apparatus main body 20 is configured such that the front side of the apparatus main body 20 can be screwed to the back plate 14 of the harness 11. The adapter 16 is manufactured to have the same shape and the same terminal structure as the battery pack (not shown) for the electric blower 3 so that the adapter 16 can be slidably connected to the battery connection portion 3b of the electric blower 3. Further, the adapter 16 is provided with a lead cable 16r including a connector 16c that can be connected to the connector 21c of the output cable 21 of the apparatus main body 20.

<About the outline of the electric circuit of the apparatus body 20>
As shown in FIG. 2, the electric circuit of the apparatus main body 20 includes two sets of cell connection circuits 50 and a protection circuit 60 that are connected in parallel. One set of cell connection circuits 50 is configured by connecting 10 sets of cell aggregates 520 including three cells 52 connected in parallel. That is, the set of cell connection circuits 50 is composed of 3 × 10 sets = 30 cells 52. The protection circuit 60 transmits the voltage signal and temperature signal of each cell 52 of the cell connection circuit 50 to the control microcomputer 70 and controls the discharge of the cell 52 based on the output signal from the control microcomputer 70. As shown in FIG. 2, the two sets of cell connection circuits 50 are connected to power supply lines 21p and 21n. After these power supply lines 21p and 21n are passed through a ferrite core 21f for noise prevention, an output cable is connected. 21 is connected. Here, as shown in FIG. 5 and the like, the ferrite core 21f is provided in a storage space at the left and right lower ends of the case main body 45 of the inner case 40 described later. The two sets of cell connection circuits 50 are connected to the charging circuit 80 via power supply lines 21p and 21n. The charging circuit 80 includes a connector 82 that can be connected to an external power source (not shown).

  The control microcomputer 70 is configured to output a signal for controlling the discharging or charging of the cell 52 to the protection circuit 60 and the charging circuit 80 based on the voltage signal and the temperature signal of each cell 52. . As shown in FIG. 2, a main switch 72 and a remaining capacity display switch 74 are connected to the control microcomputer 70. When the main switch 72 is turned on, the control microcomputer 70 outputs a discharge permission signal to the protection circuit 60. Thereby, the protection circuit 60 receives the discharge permission signal and turns on the FET 62p. As a result, the cell 52 can be discharged. When the main switch 72 is turned off, the control microcomputer 70 outputs a discharge inhibition signal to the protection circuit 60, and the protection circuit 60 turns off the FET 62p and inhibits the discharge of the cell 52. When the remaining capacity display switch 74 is turned on via the push button 74h, the control microcomputer 70 outputs a signal to the LED display section 76. Thereby, the LED display part 76 displays the remaining capacity of the cell 52 by LED.

<About the outer case 30 of the apparatus body 20>
The apparatus main body 20 includes a resin inner case 40 that houses two sets of cell connection circuit 50, protection circuit 60, charging circuit 80, control microcomputer 70, and the like, and a resin outer case that houses the inner case 40. 30. As shown in FIGS. 3 and 4, the outer case 30 is formed in a substantially rectangular parallelepiped box shape in which the front-rear direction is the thickness direction, the left-right direction is the width direction, and the vertical direction is the vertical direction. Also, the width dimension is large, and the vertical dimension is set larger than the width dimension. Overhang portions 30 s that protrude upward are formed on the left and right sides of the upper portion of the outer case 30, and an axial grip portion 30 t is passed between the left and right overhang portions 30 s. For this reason, it is possible to hold the outer case 30 by gripping the grip portion 30t. Further, on both the left and right sides of the lower portion of the outer case 30, leg portions 30k are provided that extend downward and can hold the outer case 30 upright.

  The outer case 30 includes an outer case main body portion 35 and an outer case lid 31 as shown in FIGS. The outer case main body 35 is formed in a rectangular open container shape that is opened rearward (upward as viewed in FIG. 5), and the outer case lid 31 is opened toward the front (lower as viewed in FIG. 5). It is formed in a rectangular open container shape. And the outer case main-body part 35 and the outer case cover 31 are comprised so that it may mutually match from front and back. As shown in FIGS. 5 to 7 and the like, the matching positions 35a and 31a between the outer case main body 35 and the outer case lid 31 are provided between the switch openings 35s and 31s and the connectors for the left and right legs 30k. Openings 35c and 31c are formed at intervals. That is, the switch openings 35s and 31s and the connector openings 35c and 31c are formed at positions higher than the ground contact surface 30z of the leg 30k. The switch openings 35 s and 31 s are openings through which the operation unit of the main switch 72 (see FIG. 2) passes, and the semicircular opening 35 s on the outer case main body 35 side and the semicircular opening on the outer case lid 31 side. It is configured by combining with 31s. The connector openings 35c and 31c are openings through which the connector 82 of the charging circuit 80 passes, and the semicircular opening 35c on the outer case main body 35 side and the semicircular opening 31c on the outer case lid 31 side are matched. It is constituted by.

  As shown in FIG. 7 and the like, the leg portion 30k of the outer case 30 is such that the case side leg portion 35k of the outer case main body portion 35 and the lid side leg portion 31k of the outer case lid 31 are aligned at the alignment positions 35a and 31a. It is comprised by. Then, as shown in FIG. 9, the outside and inside of the outer case 30 are communicated with the ground contact surface 30z of the leg portion 30k at the matching positions 35a and 31a of the case side leg portion 35k and the lid side leg portion 31k. A drain hole 32 is formed. Except for the ground contact surface 30z of the leg 30k, the mating positions 35a and 31a of the outer case main body 35 and the outer case lid 31 are fitted so that water is difficult to enter as shown in FIG. As shown in FIG. 9, the drainage hole 32 includes a case inner opening 32n, a case outer opening 32e, and a drainage passage 32t that is bent into a substantially Z-shaped cross section that connects the openings 32n and 32e. Thus, since the drainage hole 32 is formed in the ground contact surface 30z of the leg 30k, the water that has entered the outer case 30 and accumulated in the leg 30k can be effectively drained. Further, since the drainage passage 32t of the drainage hole 32 is bent into a substantially Z-shaped cross section, dust or the like is difficult to enter from the outside into the outer case 30 through the drainage hole 32.

  As shown in FIG. 10, the left and right overhang portions 30 s provided at the upper portion of the outer case 30 are provided with receiving bars 36 on which a stabilizer hook (not shown) of the harness 11 is hung. As shown in FIG. 11, the receiving bar 36 is bent by about 90 ° downward at both ends of the straight portion 36 y extending in the left-right direction, and further, its tip is bent forward by about 90 °. 36s. And the front-end | tip of the bending part 36s of the right and left in the receiving rod 36 is engage | inserted by the cylindrical support part 35t formed inside the outer case main-body part 35 of the outer case 30, respectively, as shown in FIG. For this reason, even if an impact or the like is applied to the overhang portion 30 s of the outer case 30, the receiving bar 36 is difficult to move back and forth, left and right, and up and down.

  As shown in FIG. 1, the bottom plate 35 b of the outer case main body portion 35 of the outer case 30 (the front side of the device main body portion 20) is configured to be screwed to the rear plate portion 14 of the harness 11. As shown in FIG. 6, the bottom plate 35 b of the outer case main body portion 35 is configured such that the peripheral portion is screwed to the back plate portion 14 of the harness 11, and the inner peripheral side of the peripheral portion is the back side. The plate portion 14 is configured to be slightly concave. The portion of the bottom plate 35b of the outer case main body 35 that has a concave shape is thinned. Further, on the inner side of the outer case main body portion 35, reinforcing grid-like ribs 35r are formed in the thin portion of the bottom plate 35b.

  Moreover, as shown in FIG. 6, the opening 35j for electric wires formed in the funnel shape in the center position of a lower end is formed inside the outer case main-body part 35. As shown in FIG. The wire opening 35j is an opening through which the output cable 21 drawn from the inner case main body 45 of the inner case 40 described later is passed. The opening 35j for the electric wire is configured such that the opening inside the outer case body 35 has a small diameter, and the opening outside the outer case body 35 is expanded as shown in FIG. As shown in FIGS. 4 and 22, the outer opening of the electric wire opening 35 j is provided at a position of a step-shaped recess 35 d formed on the lower outer side of the outer case main body 35. For this reason, the output cable 21 drawn out of the outer case main body 35 through the wire opening 35j is accommodated in the stepped recess 35d of the outer case main body 35 as shown in FIG. Disappear. Here, as shown in FIG. 3, the length dimension of the output cable 21 can reach from the wire opening 35 j of the outer case main body 35 to a position exceeding the overhanging portion 30 s along the periphery of the outer case main body 35. The length dimension is set.

<About the inner case 40 of the apparatus body 20>
The inner case 40 houses two sets of cell connection circuits 50 (cell holders 54), a protection circuit 60, a charging circuit 80, a control microcomputer 70, and the like inside the outer case 30, as shown in FIGS. It is a waterproof case. The inner case 40 is configured to be housed in the outer case 30 with a space S provided around and on the bottom side, and includes an inner case main body 45 and an inner case lid 41. The inner case main body 45 is formed in a rectangular open container shape that is opened rearward (upwardly as viewed in FIG. 12). The inner case lid 41 is formed in a rectangular open container shape that can be fitted to the inner case main body 45 from the rear (upper side in FIG. 12), and as shown in FIG. 12, the outer case lid 31 and the ceiling of the outer case 30 It is integrally formed with the outer case lid 31 in a state where the parts are made common. That is, the ceiling portion of the outer case lid 31 corresponds to a support portion of the outer case of the present invention. And the protrusion 41a extended continuously in the circumferential direction is formed in the alignment position of the inner case cover 41 with respect to the inner case main-body part 45, as shown in FIG. Further, a groove portion 45 a into which the protrusion 41 a of the inner case lid 41 is fitted is formed continuously in the circumferential direction at the position where the inner case body portion 45 is aligned with the inner case lid 41. Then, as shown in FIG. 13, the inner case lid 41 is aligned with the inner case main body portion 45, and as shown in FIG. 14, the protrusion 41 a of the inner case lid 41 is fitted with the groove portion 45 a of the inner case main body portion 45. By doing so, the waterproof performance of the inner case 40 is improved.

  As shown in FIG. 15, the inner case lid 41 is disposed at a position closer to the center with respect to the protruding portion 30 s of the outer case lid 31 of the outer case 30 and the lid-side leg portion 31 k. A space S is formed between the side wall 41 w of the inner case lid 41 and the side wall 31 w of the outer case lid 31. As described above, since the inner case lid 41 is disposed at a position closer to the center of the outer case lid 31 of the outer case 30, the space S between the side wall 41 w of the inner case lid 41 and the side wall 31 w of the outer case lid 31. Is larger inside the corner of the outer case lid 31, that is, inside the left and right overhang portions 30s and the leg portions 30k. Further, the height dimension of the side wall 41w of the inner case lid 41 is set to a value sufficiently smaller than the height dimension of the side wall 31w of the outer case lid 31 as shown in FIG. For this reason, the protrusion 41 a formed at the alignment position of the inner case lid 41 enters the inner side in the depth direction of the outer case lid 31 with respect to the alignment position 31 a of the outer case lid 31. For this reason, as shown in FIG. 13, in the state where the inner case lid 41 and the inner case main body 45 are aligned, the alignment positions 41 a and 45 a of the inner case 40 are in the depth direction of the outer case lid 31 of the outer case 30. Get inside. Therefore, even if water enters from the alignment positions 31 a and 35 a of the outer case 30, it is difficult for the water to reach the alignment positions 41 a and 45 a of the inner case 40.

  As shown in FIG. 15, for example, twelve flat cylindrical screw holes 41 n are formed at equal intervals in the circumferential direction at the alignment position of the inner case lid 41, that is, at the portion of the protrusion 41 a. Then, as shown in FIG. 17, with respect to each screw hole 41n of the inner case lid 41, each screw 45n (see FIG. 6) provided at the alignment position of the inner case main body 45, that is, at the groove 45a. ) Is configured to be screwed. Then, in the state where each screw 45n is screwed to the screw hole 41n, the protrusion 41a of the inner case lid 41 is fitted with the groove portion 45a of the inner case main body 45, thereby forming the waterproof inner case 40. Is done. Further, in this state, the inner case 40 is fixed to the outer case lid 31 of the outer case 30 as shown in FIG.

  As shown in FIGS. 6, 12, etc., the inner case main body 45 includes a cell storage portion 450 formed in a rectangular open container shape, and a frame-shaped portion 452 formed at the opening periphery of the cell storage portion 450. It is configured. As shown in FIG. 12, the frame-like portion 452 of the inner case main body 45 is formed in a substantially L-shaped cross section by a horizontal wall 452y and a vertical wall 452w. A groove 45a into which the protrusion 41a of the inner case lid 41 is fitted is formed at the upper end position of the vertical wall 452w of the frame-like portion 452 of the inner case main body 45. Further, as shown in FIG. 6, a screw holding cylinder 452t for holding the screw 45n at a predetermined position of the groove 45a is formed on the vertical wall 452w of the frame-like portion 452 of the inner case main body 45.

  As shown in FIGS. 12 and 17, the horizontal wall 452 y of the frame-like portion 452 of the inner case main body 45 is supported by a support cylinder portion 453 extending from the position of the horizontal wall 452 y toward the bottom plate 450 b of the cell storage portion 450. ing. As shown in FIG. 17, three support cylinder portions 453 are provided at equal intervals on the left side of the frame-like portion 452 of the inner case main body portion 45 and three at equal intervals on the right side. And the support cylinder part 453 has the outer peripheral surface of the support cylinder part 453 fixed to the outer wall surface of the cell storage part 450 by a rib or the like. As shown in FIGS. 12 and 13, six support columns 353 are provided in the outer case body 35 of the outer case 30 at positions corresponding to the support cylinders 453 of the inner case body 45. The six support columns 353 are erected at right angles to the bottom plate 35 b in the outer case main body 35. Further, as shown in FIG. 6, the six support columns 353 are provided at corners of the outer case main body 35, that is, at positions other than the left and right overhang portions 30s and the leg portions 30k.

  As shown in FIG. 13, with the support cylinder 453 of the inner case main body 45 supported by the support column 353 of the outer case main body 35, the side wall of the inner case main body 45 and the side wall of the outer case main body 35 are A space S is formed between them. Further, a space is also formed between the bottom plate 450 b of the inner case main body 45 and the bottom plate 35 b of the outer case main body 35. As shown in FIG. 18, a screw 353 n for screwing the column 353 of the outer case main body 35 to the support cylinder 453 of the inner case main body 45 is accommodated in the column 353 of the outer case main body 35. Has been. Accordingly, the outer case main body 35 can be connected to the inner case main body 45 by screwing the support column 353 of the outer case main body 35 to the support cylinder 453 of the inner case main body 45. That is, the outer case body 35 can be connected to the outer case lid 31 (outer case 30) via the inner case body 45 and the inner case lid 41 (inner case 40). Further, as shown in FIG. 19, the outer case lid 31 and the outer case main body 35 of the outer case 30 are connected at the corners of the outer case 30, that is, at the positions of the left and right projecting portions 30s and the leg portions 30k. It is configured to be screwed directly using the cylindrical portions 31z and 35z. That is, the six support columns 353 of the outer case body 35 correspond to the outer case support in the present invention.

  As shown in FIG. 17, the inner case main body 45 (cell housing portion 450) of the inner case 40 is provided with a switch at a position corresponding to the switch openings 35s, 31s and the connector openings 35c, 31c of the outer case 30. An opening 455 and a connector opening 456 are formed. In addition, in the cell storage portion 450 of the inner case main body portion 45, an electric wire opening 457 is formed at a position corresponding to the electric wire opening 35j of the outer case main body portion 35.

  The switch opening 455 of the inner case main body 45 (cell storage portion 450) is an opening through which the main body shaft portion 72j of the main switch 72 is passed, as shown in FIG. As shown in FIG. 2, the main switch 72 is a waterproof switch for discharging and stopping the discharge of the cell 52, and a large-diameter flange portion 72f is provided on the distal end side of the main body shaft portion 72j. An operation portion 72p configured to be relatively movable with respect to the flange portion 72f and the main body shaft portion 72j is provided inside the flange portion 72f in the radial direction. A male screw is formed on the outer peripheral surface of the main body shaft portion 72j of the main switch 72, and a holding nut 72n is screwed to the male screw. Further, a ring-shaped sealing material (elastic body (not shown)) is set around the main body shaft portion 72j of the main switch 72, and is superimposed on the flange portion 72f. For this reason, the main shaft 72j of the main switch 72 is passed through the switch opening 455 of the cell storage portion 450, and the holding nut 72n is screwed into the male screw of the main body shaft 72j, so that the main switch 72 is kept in a watertight state. It can be attached to the switch opening 455. In this state, the operation portion 72p of the main switch 72 can be operated at the positions of the switch openings 35s and 31s of the outer case 30.

  The connector opening 456 of the cell storage portion 450 of the inner case main body 45 is an opening through which the connector 82 of the charging circuit 80 is passed, as shown in FIG. The connector 82 is a waterproof connector with a lid, and includes a lid portion 82c and a connector main body portion 82x. The connector main body portion 82x is formed with a ring-shaped flange portion 82f at an intermediate position in the axial direction, and the distal end side of the flange portion 82f passes through the connector opening 456 from the inside of the cell storage portion 450. Yes. A male screw is formed on the outer peripheral surface of the distal end portion of the connector main body portion 82x protruding outside from the connector opening 456. Then, after a ring-shaped sealing material (elastic body (not shown)) is set at the tip of the connector body 82x, a holding nut 82n is screwed onto the male screw. Thereby, the connector 82 (connector main body part 82x) can be attached to the connector opening 456 in a watertight state. In this state, the tip end portion of the connector main body portion 82x protrudes from the connector openings 35c and 31c of the outer case 30 to the outside.

  The wire opening 457 of the cell storage portion 450 of the inner case main body 45 is an opening through which the output cable 21 is passed, as shown in FIG. A waterproof clamp 25 for sealing between the wire opening 457 and the output cable 21 is set in the wire opening 457. The waterproof clamp 25 is a cylindrical member that is passed through the wire opening 457 in a state where the output cable 21 is inserted. The waterproof clamp 25 is coaxial with a cylindrical portion 25j having a male screw formed on the outer peripheral surface and one end of the cylindrical portion 25j. A formed flange portion 25f is provided. Then, with the cylindrical portion 25j of the waterproof clamp 25 being passed through the wire opening 457 of the cell storage portion 450 together with the output cable 21, the holding nut 25n is screwed onto the male screw of the cylindrical portion 25j. Then, by tightening the holding nut 25n, the flange portion 25f of the waterproof clamp 25 is brought into pressure contact with the peripheral edge of the wire opening 457, and the waterproof clamp 25 and the wire opening 457 are sealed.

<About storing the cell connection circuit 50 and the like in the inner case main body 45>
FIG. 23 is a circuit diagram schematically showing two sets of cell connection circuits 50 according to the arrangement of the cells 52. Here, one cell symbol represents a cell aggregate 520 composed of three cells 52 connected in parallel. As described above, the set of cell connection circuits 50 is configured by connecting 10 sets of cell aggregates 520 including three cells 52 connected in parallel. The voltage signals of the + electrode and the − electrode of each cell 52, that is, the voltage signals of No. 1 to No. 11 are input to the substrates 62 and 64 of the protection circuit 60. The cells 52 constituting the set of cell connection circuits 50 are accommodated in one cell holder 54 as shown in FIGS. The cell holder 54 is formed in a cylindrical frame shape in which both the left and right sides are open, and the left and right dimension of the cell holder 54 is set to a value substantially equal to the axial length dimension (+, −electrode dimension) of the cell 52.

  In the cell holder 54, the cells 52 are stacked in three stages in the front-rear direction (upward and downward direction in the drawing of FIG. 24, etc.), and the cell assemblies 520 stacked in three stages are arranged in ten rows in the vertical direction (longitudinal direction). Stored. Lead plates 55 are provided on the left and right sides of the cell holder 54. The lead plate 55 is a conductor flat plate for inputting the voltage signals of the + electrode and the − electrode of each cell 52 to the substrates 62 and 64 of the protection circuit 60. The lead plate 55 is a lead plate main body portion 55e welded to the + electrode and the − electrode of the cell 52, and protrudes rearward (upward in the drawing in FIG. 24, etc.) from the lead plate main body portion 55e. And a terminal portion 55c connected to the substrate 64. For example, in the case of the lead plate 55 of No. 2 to No. 10, as shown in FIGS. 23, 24, etc., the + electrode of three cells 52 and the-electrode of another three cells 52 are welded. Configured to be connected. In the case of the lead plate 55 of the No. 1 portion, as shown in FIGS. 23 and 25, the + electrodes of the three cells 52 are connected by welding. Further, in the case of the No. 11 portion lead plate 55, as shown in FIGS. 23 and 25, the negative electrodes of the three cells 52 are connected by welding.

  When the cell 52 is stored in the cell holder 54 and the lead plates 55 of No. 1 to No. 11 are respectively connected to the + electrode and the − electrode of the cell 52, as shown in FIGS. The left and right openings are closed by the side lid 57. On the surfaces of the left and right side lids 57, a plurality of protrusions 57r extending in the front-rear direction (up and down in the paper view in FIG. 24, etc.) are provided at predetermined positions. Then, when the two cell holders 54 are stored in the cell storage portion 450 of the inner case main body 45 as shown in FIG. 26, the ridges 57r of the right side cover 57 in the left cell holder 54 and the right side The protrusion 57r of the left side cover 57 of the cell holder 54 is fitted. As a result, the left and right cell holders 54 cannot be moved relative to each other in the longitudinal direction (vertical direction). Further, as shown in FIG. 28, the cell storage portion 450 of the inner case main body portion 45 is vertically arranged so that it can be fitted to the protrusions 57r of the side cover 57 of each cell holder 54, as shown in FIG. Ribs 450r are formed. As a result, the left and right cell holders 54 housed in the cell housing portion 450 of the inner case main body 45 cannot move relative to the cell housing portion 450 in the longitudinal direction (vertical direction) and in the front-rear direction.

  When the left and right cell holders 54 are stored in the cell storage portion 450 of the inner case main body 45, as shown in the schematic wiring diagram of FIG. 23, the No. 2, No. 4, No. 6, No. .8, No. 10 portion lead plate 55 and right cell holder 54 No. 2, No. 4, No. 6, No. 8, No. 10 portion lead plate 55 are left and right of cell storage portion 450. Arranged in the center of the direction. In addition, the lead plate 55 of No. 1, No. 3, No. 5, No. 7, No. 9, and No. 11 of the left cell holder 54 is disposed on the left side of the cell storage portion 450. Furthermore, the lead plate 55 of the No. 1, No. 3, No. 5, No. 7, No. 9, No. 11 portion of the right cell holder 54 is disposed on the right side of the cell storage portion 450.

  And on the lead plate 55 of the left and right No.2, No.4, No.6, No.8, No.10 portions arranged in the center of the cell storage portion 450, as shown in FIG. An auxiliary substrate 64 of the protection circuit 60 is disposed. The auxiliary board 64 is a board for transmitting the voltage signal of the cell 52, the cell temperature signal, and the like guided by the lead plate 55 disposed in the center to the main body board 62 of the protection circuit 60. As shown in FIG. 26, the auxiliary substrate 64 is formed in a strip shape, and matches the arrangement of the left and right lead plates 55 of No. 2, No. 4, No. 6, No. 8, and No. 10. The width dimension is set. A signal connector 64z connected to a signal connector 62z provided at the center of the back surface of the main board 62 is provided at the center of the front surface of the auxiliary substrate 64. 29 and 30 are shown on the lead plate 55 of the No. 1, No. 3, No. 5, No. 7, No. 9, No. 11 portion arranged at the left and right ends of the cell storage portion 450. As shown, a body substrate 62 of the protection circuit 60 is disposed. The main body substrate 62 is formed in a size substantially equal to the planar size of the cell storage portion 450.

  As shown in FIGS. 24 and 25, the left and right cell holders 54 are formed with columnar substrate support portions 54 p at positions corresponding to the terminal portions 55 c of the lead plates 55. As shown in FIG. 27, the substrate support portion 54p of the cell holder 54 is configured to support the terminal portion 55c of the lead plate 55 and the back surface of the main body substrate 62 or the auxiliary substrate 64 by the front end surface 54s. Here, the substrate support portion 54 p of the central cell holder 54 that supports the auxiliary substrate 64 is set to have a height smaller than the substrate support portions 54 p of the left and right cell holders 54 that support the main body substrate 62 by a certain dimension. A nut 54n into which a screw 63 for fixing the substrates 62 and 64 is screwed is inserted into the substrate support portion 54p of the cell holder 54. Further, on the back surface of the main body substrate 62 or the auxiliary substrate 64, circuit conductor portions 62d and 64d are provided in portions supported by the substrate support portion 54p of the cell holder 54.

  Therefore, when the auxiliary substrate 64 is set on the lead plates 55 of the No. 2, No. 4, No. 6, No. 8, No. 10 portions of the left and right cell holders 54, as shown in FIG. The terminal portion 55 c of the lead plate 55 is sandwiched between the substrate support portion 54 p of the cell holder 54 and the auxiliary substrate 64. In this state, the terminal portion 55c of the lead plate 55 is electrically connected to the conductor portion 64d of the auxiliary substrate 64 by screwing the auxiliary substrate 64 to the substrate support portion 54p of the cell holder 54. That is, the screw 63 and the nut 54n inserted into the substrate support 54p of the cell holder 54 correspond to the mechanical coupling mechanism of the present invention.

  As described above, the substrate support portion 54p of the central cell holder 54 that supports the auxiliary substrate 64 has a height dimension set smaller than the substrate support portions 54p of the left and right cell holders 54 that support the main body substrate 62 by a certain dimension. Yes. Therefore, as shown in FIG. 30, after the auxiliary substrate 64 is set on the cell holder 54, the main substrate 62 can be set on the left and right cell holders 54 in parallel with the auxiliary substrate 64 from the outside of the auxiliary substrate 64. . Here, when the main board 62 is set from the outside of the auxiliary board 64, the signal connector 62z of the main board 62 is connected to the signal connector 64z of the auxiliary board 64 as shown in FIGS. .

  Then, the main body substrate 62 is set on the lead plates 55 of the No. 1, No. 3, No. 5, No. 7, No. 9, No. 11 portions of the left and right cell holders 54, so that FIG. As shown, the terminal portions 55 c of the lead plates 55 are sandwiched between the substrate support portion 54 p of the cell holder 54 and the main body substrate 62. In this state, the main body substrate 62 is screwed to the substrate support portion 54p of the cell holder 54, whereby the terminal portion 55c of the lead plate 55 is electrically connected to the conductor portion 62d of the main body substrate 62. Here, as described above, the voltage signals of the lead plates 55 of No. 2, No. 4, No. 6, No. 8, and No. 10 arranged in the central portion of the cell storage portion 450 are the auxiliary boards. 64 to the main board 62. For this reason, it is not necessary to provide the connection part of the lead plate 55 of No. 2, No. 4, No. 6, No. 8, and No. 10 in the central part of the main body substrate 62. Thereby, the circuit design of the main body substrate 62 can be simplified.

  As shown in FIG. 2, two sets of protection circuits 60 are provided on the main body substrate 62, and a control microcomputer 70 for controlling the protection circuits 60 is further mounted. Further, as shown in FIGS. 29 and 30, the main body substrate 62 is provided with a remaining capacity display switch 74 and an LED display section 76. The remaining capacity display switch 74 and the LED display section 76 are provided at the upper center of the main body substrate 62. As shown in FIG. 15, a push button 74 h is provided at a position corresponding to the remaining capacity display switch 74 on the ceiling portion of the inner case lid 41 (outer case lid 31) of the inner case 40, and LED display is performed. A remaining capacity display lens 76e is provided at a position corresponding to the LED of the section 76. As shown in FIG. 16, the push button 74 h and the remaining capacity display lens 76 e are integrally formed of a flexible resin and provided on the ceiling portion of the inner case lid 41 (outer case lid 31) of the inner case 40. Is fitted into the opening. Further, as shown in FIG. 29 and the like, a plurality of FETs 62p constituting the protection circuit 60 are provided on the left and right ends of the main body substrate 62. A heat radiating plate 62y for cooling the FET 62p is provided so as to cover the main body substrate 62 through a space in contact with the surface of the FET 62p, as shown in FIGS. That is, the FET 62p is sandwiched between the main body substrate 62 and the heat radiating plate 62y.

<Advantages of Power Supply Device 10 According to the Present Embodiment>
According to the power supply device 10 according to the present embodiment, the outer case 30 is made of resin and has flexibility. Further, the support portion of the outer case 30 that supports the inner case 40 that accommodates the cell 52, that is, the ceiling portion of the outer case lid 31, and the six column portions 353 of the outer case main body portion 35 are at least other than the corner portions of the outer case 30. It is provided in the position. For this reason, the support part which supports the inner case 40, a rib, etc. are not provided inside the corner | angular part of the outer case 30, and it is the space S. Therefore, when the power supply device 10 falls and the corners of the outer case 30 collide with the floor surface, the corners of the outer case 30 bend, and the impact is absorbed to some extent. Further, since the bending of the corner portion of the outer case 30 is absorbed in the space S, the impact applied to the corner portion of the outer case 30 is not directly applied to the inner case 40. For this reason, the impact applied to the cell 52 accommodated in the inner case 40 can be suppressed.

  Further, the support portion of the outer case 30 that supports the inner case 40 is provided at a position other than the side wall of the outer case 30 where the alignment positions 31 a and 35 a of the outer case main body 35 and the outer case lid 31 are provided. For this reason, the side wall of the outer case 30 and the side wall of the inner case 40 are not connected, and a space S is formed between the side wall of the outer case 30 and the side wall of the inner case 40. Therefore, even if the power supply device 10 falls and the side wall of the outer case 30 is bent by an impact, the bending is absorbed by the space S and no direct impact is applied to the inner case 40. Moreover, the cell 52 is accommodated in the inner case 40 so that a wide space is provided on the inner case lid 41 side. For this reason, even if the inner case lid 41 of the inner case 40 is bent by an impact, the cell 52 in the inner case 40 is hardly affected by the bending of the inner case lid 41. In the inner case 40, together with the cell 52, there are housed a body substrate 62 and an auxiliary substrate 64 of the protection circuit 60 that monitors the voltage of the cell 52, and a heat radiating plate 62y that radiates heat of the FET 62p on the body substrate 62. ing. And the heat sink 62y is provided in the inner case cover 41 side. For this reason, even if the inner case lid 41 of the inner case 40 is bent by an impact, the impact can be absorbed to some extent by the heat radiating plate 62y by the inner case lid 41 hitting the heat radiating plate 62y.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in the embodiment, the inner case lid 41 and the outer case lid 31 are integrally formed so that the ceiling portion of the inner case lid 41 of the inner case 40 and the ceiling portion of the outer case lid 31 of the outer case 30 are common. An example is shown. However, a space is formed between the ceiling portion of the inner case lid 41 and the ceiling portion of the outer case lid 31 of the outer case 30, and the inner case lid 41 is supported by a plurality of support columns formed inside the outer case lid 31. A configuration is also possible. Further, in the present embodiment, an example in which the inner case main body 45 of the inner case 40 is supported by the six support columns 353 provided in the outer case main body 35 of the outer case 30 is shown. However, a configuration in which the bottom plate of the outer case main body portion and the bottom plate of the inner case main body portion 45 are connected instead of providing the column portion 353 in the outer case main body portion 35 is also possible. Moreover, the structure which integrates the bottom plate of an outer case main-body part and the bottom plate of the inner case main-body part 45 is also possible. Further, in the present embodiment, the electric blower 3 is illustrated as an example of the electric working machine. However, the electric working machine includes only an electric hedge trimmer, an electric mower, an electric lawn mower, an electric chain saw, an electric reciprocating saw, and an electric grinder. In addition, power tools such as an electric saw, power drill, and power driver are also included.

3. Electric blower (electric work machine)
DESCRIPTION OF SYMBOLS 10 ... Power supply device 30 ... Outer case 31w ... Side wall 31 ... Outer case lid 35 ... Outer case main body part 35b ... Bottom plate 353 ... Post part (outer case Support part)
40... Inner case 41... Inner case lid 45... Inner case body 52... Cell 60. Substrate 64... Auxiliary substrate

Claims (8)

A power supply device capable of supplying electric power to a plurality of cells to an electric work machine,
A box-shaped inner case for storing the plurality of cells;
A box-shaped outer case for storing the inner case;
The power supply apparatus in which the support part of the said outer case which supports the said inner case is provided in positions other than the corner | angular part of the said outer case at least. The power supply device according to claim 1,
The inner case is composed of an inner case main body and an inner case lid that closes the opening of the inner case main body.
The outer case is composed of an outer case main body and an outer case lid that closes an opening of the outer case main body.
The support part of the outer case that supports the inner case is a power supply device provided at a position other than the side wall of the outer case where the outer case main body and the outer case lid are aligned. The power supply device according to claim 2,
The power supply device in which the inner case cover of the inner case and the outer case cover of the outer case are integrated in a state where the top plate portions are connected to each other. The power supply device according to claim 2 or 3, wherein
The side wall of the outer case and the side wall of the inner case are provided in parallel at positions other than the corners of the outer case, and the side walls of the outer case are located at the corners of the outer case. A power supply that is further away from the side wall and becomes non-parallel. The power supply device according to any one of claims 2 to 4,
The power supply device in which a gap dimension between the side wall of the outer case and the side wall of the inner case is set to a larger value at a corner portion of the outer case than at a position other than the corner portion of the outer case. The power supply device according to any one of claims 2 to 5,
The side walls constituting the corners of the inner case are formed in a planar arc shape,
The clearance dimension between the side wall of the planar arc-shaped inner case and the sidewall of the outer case is set to a value larger than the clearance dimension between the sidewall other than the corner of the inner case and the sidewall of the outer case. Power supply. The power supply device according to any one of claims 2 to 6,
In the inner case, the cell is housed so that a wide space is provided on the inner case lid side. The power supply device according to claim 7, wherein
In the inner case, together with the cell, a substrate of a protection circuit that monitors the voltage of the cell, and a heat radiating plate that radiates electric components on the substrate are housed,
A power supply apparatus, wherein the heat radiating plate is provided on an inner case lid side.

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