Power supply device

Abstract

To provide a structure in which a sheet-type battery can be easily attached to and detached from a substrate, and the connection state between the substrate and the sheet-type battery is unlikely to change.SOLUTION: A fixing portion 5, which detachably fixes a sheet-shaped battery 4 to a substrate 2, includes a fixing portion main body 6 connected to the substrate 2, a positioning portion provided on the fixing portion main body 6 and which positions the sheet-shaped battery 4 relative to the substrate 2 such that a positive electrode terminal exposed portion 412a and a negative electrode terminal exposed portion 422a face the connection portion 31 of a conductive path 3, and a pressing portion 7 provided on the fixing portion main body 6 so as to press the portion of the outer casing 44 of the sheet-shaped battery 4, located on the opposite side of the sheet-shaped battery 4 thicknesswise from the positive electrode terminal exposed portion 412a and the negative electrode terminal exposed portion 422a, toward the substrate 2 such that the positive electrode terminal exposed portion 412a and the negative electrode terminal exposed portion 422a of the sheet-shaped battery 4 contact the connection portions 31 of the conductive path 3 with the sheet-shaped battery 4 positioned relative to the substrate 2 by the positioning portion.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a power supply device having a sheet-type battery as a power supply source. [Background technology]

[0002] In a power supply device having a sheet-type battery as a power source, a method for fixing the sheet-type battery to the main body of the power supply device is known. For example, Patent Document 1 discloses a fixing mechanism for a battery electrode terminal, which has a lower contact portion provided on a substrate and an upper contact portion provided opposite the lower contact portion. The upper contact portion is attached to a rotating body and can be pressed down toward the lower contact portion by operating an operating portion. At least one of the upper and lower contact portions is provided with a connecting portion that is electrically connected to the electrode terminal.

[0003] In the fixing mechanism, a battery is placed on a substrate, the electrode terminal of the battery is inserted into the gap between the upper and lower contact portions, and the operating portion is operated to rotate the rotating body and press the upper contact portion toward the lower contact portion, thereby clamping the electrode terminal of the battery between the upper and lower contact portions, thereby clamping the electrode terminal between the upper and lower contact portions and electrically connecting it to the connection portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-186097 Summary of the Invention [Problem to be solved by the invention]

[0005] The fixing mechanism disclosed in Patent Document 1 can fix the sheet-type battery to the substrate of the power supply device and electrically connect the electrodes of the sheet-type battery to the conductive paths formed on the substrate. Therefore, by using the fixing mechanism, the sheet-type battery can be easily attached to the substrate.

[0006] However, in the fixing mechanism of Patent Document 1, the upper and lower contact portions directly clamp the electrode terminals. Therefore, when the fixing mechanism is used to fix a sheet-type battery to a substrate, the connection between the substrate and the sheet-type battery may change when an external force is applied to the sheet-type battery.

[0007] Therefore, there is a demand for a configuration that allows for easy attachment of a sheet-type battery to a substrate and that makes it difficult for the connection between the substrate and the sheet-type battery to change when the sheet-type battery is attached.

[0008] The object of the present invention is to provide a configuration in which a sheet-type battery can be easily attached to a substrate and the connection state between the substrate and the sheet-type battery is unlikely to change when the sheet-type battery is attached. [Means for solving the problem]

[0009] A power supply device according to one embodiment of the present invention includes a substrate, a conductive path formed on one surface of the substrate in the thickness direction, a sheet-type battery fixed to one side of the substrate in a state overlapping the thickness direction, and a fixing portion for detachably fixing the sheet-type battery to the one side of the substrate in the thickness direction. The sheet-type battery includes a positive electrode having a positive terminal, a negative electrode having a negative terminal, and an exterior housing that houses a portion of each of the positive electrode and the negative electrode. The positive electrode terminal has a positive terminal exposed portion that is exposed from the exterior housing on one side of the sheet-type battery in the thickness direction, which is opposite the substrate. The negative electrode terminal has a negative terminal exposed portion that is exposed from the exterior housing on one side of the sheet-type battery in the thickness direction, which is opposite the substrate. The fixing part includes a fixing part main body connected to the substrate, a positioning part provided on the fixing part main body and configured to position the sheet-type battery relative to the substrate so that the positive electrode terminal exposed portion and the negative electrode terminal exposed portion face the conductive path, and a pressing part provided on the fixing part main body so that, when the sheet-type battery is positioned relative to the substrate by the positioning part, a portion of the outer casing of the sheet-type battery that is located on the opposite side of the sheet-type battery's positive electrode terminal exposed portion and negative electrode terminal exposed portion in the thickness direction is pressed toward the substrate so that the positive electrode terminal exposed portion and the negative electrode terminal exposed portion of the sheet-type battery come into contact with the conductive path (first configuration).

[0010] As a result, the pressing portion can press the portion of the exterior body located on the opposite side of the sheet-type battery thickness direction from the positive and negative terminal exposed portions toward the conductive path. This allows the positive and negative terminal exposed portions of the sheet-type battery to come into contact with the conductive path. This allows the sheet-type battery to be electrically connected to the conductive path. Furthermore, the pressing of the pressing portion can fix the sheet-type battery to the substrate. This allows for a configuration in which the operation of the pressing portion can fix the sheet-type battery to the substrate and electrically connect the sheet-type battery to the conductive path formed on the substrate.

[0011] The pressing portion presses the portion of the exterior body that covers the positive and negative terminals, and therefore does not come into contact with the positive and negative terminals of the sheet-type battery, thereby preventing the positive and negative terminals from being deformed by contact with the pressing portion.

[0012] Therefore, it is possible to provide a configuration in which the sheet-type battery can be easily attached to the substrate, and the connection state between the substrate and the sheet-type battery is unlikely to change when the sheet-type battery is attached.

[0013] In the first configuration, the positioning portion has a contact portion that contacts a part of the outer edge of the exterior body (second configuration).

[0014] This allows the sheet-type battery to be positioned at a predetermined position relative to the substrate with the outer edge of the battery's exterior body in contact with the positioning portion, making it possible to easily and accurately position the sheet-type battery relative to the substrate.

[0015] In the second configuration, the sheet-type battery is rectangular, the contact portion extends along one side of the sheet-type battery and contacts the one side, and the length of the contact portion in the extension direction is the same as the length of the one side of the sheet-type battery (third configuration).

[0016] By aligning the one side of the sheet-type battery with the contact portion in the extension direction of the contact portion, the sheet-type battery can be easily positioned relative to the substrate.

[0017] In any one of the first to third configurations, the pressing portion is configured to be movable relative to the fixed portion main body between a pressing position where it presses the portion of the outer casing located on the opposite side toward the substrate, and a non-pressing position away from the outer casing (fourth configuration).

[0018] This allows the sheet-type battery to be fixed to the substrate when the pressing portion is in the pressing position, and released from the substrate when the pressing portion is in the non-pressing position, thereby providing a configuration in which the sheet-type battery can be attached and detached to the substrate by switching the position of the pressing portion.

[0019] In the fourth configuration, the fixing portion has an operating portion that moves the pressing portion between the pressing position and the non-pressing position relative to the fixing portion main body (fifth configuration).

[0020] This allows the pressing portion to be easily moved between the pressing position and the non-pressing position, improving the workability of attaching and detaching the sheet-type battery to and from the substrate.

[0021] In the fifth configuration, the operating unit is rotatable relative to the fixed unit body around a rotation axis parallel to the substrate, and extends radially of the rotation axis when viewed in the axial direction of the rotation axis, and moves the pressing unit toward the pressing position by rotating in a direction toward the substrate, and moves the pressing unit toward the non-pressing position by rotating in a direction away from the substrate (sixth configuration).

[0022] The operating unit approaches the board when the pressing unit is moved to the pressing position. Therefore, a fixing unit with a smaller distance between the operating unit and the board can be realized when the pressing unit is in the pressing position compared to when the pressing unit is in the non-pressing position. This makes it possible to realize a power supply device with a smaller dimension in the thickness direction of the board when the sheet-type battery is attached. [Effects of the Invention]

[0023] According to an exemplary embodiment of the present invention, a fixing part that detachably fixes a sheet-type battery to a substrate includes a fixing part main body connected to the substrate, a positioning part provided on the fixing part main body that positions the sheet-type battery relative to the substrate so that the positive electrode terminal exposed part and the negative electrode terminal exposed part face the conductive path, and a pressing part provided on the fixing part main body that can press a part of the outer casing of the sheet-type battery that is located on the opposite side of the positive electrode terminal exposed part and the negative electrode terminal exposed part in the thickness direction of the sheet-type battery toward the substrate so that the positive electrode terminal exposed part and the negative electrode terminal exposed part of the sheet-type battery contact the conductive path when the sheet-type battery is positioned on the substrate by the positioning part.

[0024] This configuration allows the sheet-type battery to be fixed to the substrate by the operation of the pressing part, and allows the conductive paths formed on the substrate to be electrically connected to the sheet-type battery. Therefore, it is possible to provide a configuration in which the sheet-type battery can be easily attached to the substrate, and the connection between the substrate and the sheet-type battery is unlikely to change when the sheet-type battery is attached. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 1 is a perspective view that schematically shows the general configuration of a power supply device according to an embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the power supply device. [Figure 3] FIG. 3 is a cross-sectional view that schematically shows the general configuration of the power supply device. [Figure 4] FIG. 4 is a plan view of the sheet-type battery as seen from one side in the thickness direction. [Figure 5] FIG. 5 is a plan view of the sheet-type battery as seen from the other side in the thickness direction. [Figure 6] FIG. 6 is a partially enlarged view of FIG. [Figure 7] FIG. 7 is a diagram illustrating how to attach and detach the sheet-type battery. [Figure 8]FIG. 8 is a diagram illustrating how to attach and detach the sheet-type battery. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals and description thereof will not be repeated.

[0027] In addition, in each figure used in this specification, the arrangement of each component is shown schematically to explain the interrelationship between each component, and differs from the actual dimensional ratio, etc.

[0028] In the following description, the thickness direction of the plate-shaped substrate 2 will be simply referred to as the thickness direction. In the thickness direction, the side of the substrate 2 on which the sheet-shaped batteries 4 are located will be referred to as one side of the thickness direction, and the opposite side will be referred to as the other side of the thickness direction.

[0029] (Embodiment) An example of a power supply device 1 according to an embodiment will be described with reference to FIGS. 1 to 3. The power supply device 1 has a sheet-type battery 4 as its power supply source. The power supply device 1 is connected to an electronic device (not shown) and supplies power from the sheet-type battery 4 to the electronic device. As shown in FIGS. 1 to 3, the power supply device 1 has a substrate 2, a conductive path 3, a sheet-type battery 4, and a fixing portion 5. FIG. 1 is a perspective view schematically showing the general configuration of the power supply device 1. FIG. 2 is an exploded perspective view of the power supply device 1. FIG. 3 is a cross-sectional view schematically showing the general configuration of the power supply device 1.

[0030] As shown in FIG. 2 , the substrate 2 has a rectangular shape when viewed in the thickness direction. The substrate 2 has an upper surface 21, which is one surface in the thickness direction, and a lower surface 22, which is the other surface in the thickness direction. The substrate 2 has two sides extending in a first direction and two sides extending in a second direction that is perpendicular to the first direction. The substrate 2 has a portion of a conductive path 3 on the upper surface 21 on the side of a first side 2a, one of the two sides extending in the second direction. The positive terminal 412 and the negative terminal 422 of the sheet-type battery 4 are connected to the portion of the conductive path 3. For ease of explanation, the portion of the conductive path 3 will be referred to as a connection portion 31 below.

[0031] The substrate 2 may be a flexible substrate that is deformable in the thickness direction, or may be a plate-like substrate that is not deformable in the thickness direction.

[0032] The conductive path 3 is a path through which current flows between the sheet-like battery 4 and the electronic device. The conductive path 3 may be, for example, a wiring or a circuit formed on the substrate 2. As described above, the connection portion 31, which is part of the conductive path 3, is provided at a predetermined position on the upper surface 21 of the substrate 2. The portion of the conductive path 3 other than the connection portion 31 may be formed on the upper surface 21 or the lower surface 22 of the substrate 2. Note that in each drawing, the portion of the conductive path 3 other than the connection portion 31 is omitted from illustration.

[0033] The sheet-shaped battery 4 is a battery formed in a sheet shape. In this embodiment, the sheet-shaped battery 4 is rectangular when viewed in the thickness direction. The sheet-shaped battery 4 has two sides extending in a first direction and two sides extending in a second direction. The first direction is the direction in which the positive electrode terminal 412 and the negative electrode terminal 422 extend. In this specification, the term "sheet-shaped" refers to a shape whose thickness is smaller than the length of the sides when viewed in the thickness direction. The sheet-shaped battery 4 may be a plate-shaped battery that is deformable in the thickness direction, or a plate-shaped battery that is not deformable in the thickness direction. The sheet-shaped battery 4 is, for example, a manganese battery, an alkaline battery, or a lithium battery.

[0034] The length of the sheet-type battery 4 in the second direction is L1. As shown in Fig. 1, in this embodiment, the length L1 of the sheet-type battery 4 in the second direction is equal to the length of the substrate 2 in the second direction.

[0035] The sheet-shaped battery 4 is stacked in the thickness direction on the upper surface 21 side of the substrate 2. The sheet-shaped battery 4 is arranged on the upper surface 21 side of the substrate 2 in an orientation in which the first direction coincides with the first direction of the substrate 2 and the second direction coincides with the second direction of the substrate 2. The sheet-shaped battery 4 is detachably fixed to the substrate 2 by a fixing part 5. The sheet-shaped battery 4 can be attached to or detached from the substrate 2 by operating the fixing part 5. In other words, the sheet-shaped battery 4 is replaceable in the power supply device 1.

[0036] (Sheet battery) Fig. 4 is a plan view of the sheet-type battery 4 as seen from one side in the thickness direction, and Fig. 5 is a plan view of the sheet-type battery 4 as seen from the other side in the thickness direction.

[0037] 3 to 5, the sheet-type battery 4 includes a positive electrode 41, a negative electrode 42, a separator (not shown), an electrolyte (not shown), and an exterior body 44. The positive electrode 41, the negative electrode 42, the separator, and the electrolyte may be configured as known positive electrodes, negative electrodes, separators, and electrolytes. Therefore, detailed descriptions and illustrations of the positive electrode 41, the negative electrode 42, the separator, and the electrolyte are omitted. The positive electrode 41, the negative electrode 42, and the separator are stacked in the thickness direction and housed within the exterior body 44.

[0038] 4 and 5, the positive electrode 41 has a positive electrode current collector (not shown) and a positive electrode terminal 412. In this embodiment, the positive electrode terminal 412 is plate-shaped. The positive electrode terminal 412 is connected to the positive electrode current collector and extends in a first direction. The positive electrode terminal may be formed integrally with the positive electrode current collector using the same material.

[0039] The negative electrode 42 has a negative electrode current collector (not shown) and a negative electrode terminal 422. In this embodiment, the negative electrode terminal 422 is plate-shaped. The negative electrode terminal 422 is connected to the negative electrode current collector and extends in a first direction. The positive electrode terminal 412 and the negative electrode terminal 422 are aligned in a second direction. The negative electrode terminal may be integrally formed with the negative electrode current collector using the same material.

[0040] As shown in FIGS. 3 to 5, the exterior body 44 forms the outer surface of the sheet-type battery 4. The exterior body 44 has a rectangular first sheet 441 that forms one outer surface in the thickness direction of the sheet-type battery 4, and a rectangular second sheet 442 that forms the other outer surface in the thickness direction. The first sheet 441 and the second sheet 442 are fused together at four sides of the rectangular periphery. This forms a space between the first sheet 441 and the second sheet 442 to accommodate the positive electrode 41, the negative electrode 42, and the separator. The positive electrode 41, the negative electrode 42, and the separator are accommodated within the exterior body 44, with some exceptions.

[0041] It should be noted that exterior body 44 may be formed by folding back a single sheet. That is, first sheet 441 and second sheet 442 may not be separate sheets, but may be connected at one edge. In this case, first sheet 441 and second sheet 442 may be fused together at three edges of the rectangular periphery, excluding the folded edge.

[0042] In this embodiment, as shown in FIG. 5 , the second sheet 442 has a positive electrode cutout 442a and a negative electrode cutout 442b. The positive electrode cutout 442a exposes a portion of the other thickness direction side of the positive electrode terminal 412. The negative electrode cutout 442b exposes a portion of the other thickness direction side of the negative electrode terminal 422. The positive electrode cutout 442a and the negative electrode cutout 442b are formed on the first side 4a extending in the second direction, which is located on the tip side of the positive electrode terminal 412 and the negative electrode terminal 422. Note that, as shown in FIG. 4 , the first sheet 441 does not have a portion that exposes the positive electrode terminal 412 and the negative electrode terminal 422. One thickness direction side of the positive electrode terminal 412 and the negative electrode terminal 422 is covered by the first sheet 441.

[0043] That is, the positive electrode terminal 412 has, on the other side in the thickness direction, a positive electrode terminal exposed portion 412a exposed from the exterior body 44. The negative electrode terminal 422 has, on the other side in the thickness direction, a negative electrode terminal exposed portion 422a exposed from the exterior body 44.

[0044] As shown in FIG. 3 , the positive electrode cutout 442a and the negative electrode cutout 442b are formed at positions on the substrate 2 where the connection portions 31 of the conductive paths 3 are provided. Specifically, the second sheet 442 side of the sheet-type battery 4 is placed opposite the upper surface 21 of the substrate 2, and the positions of the first side 2a of the substrate 2 and the first side 4a of the sheet-type battery 4 are aligned in the first and second directions. In this state, at least a portion of the positive electrode cutout 442a and the negative electrode cutout 442b faces the connection portions 31 of the conductive paths 3. Note that in this state, the connection portions 31 of the conductive paths 3 may be formed at positions on the substrate 2 facing the positive electrode cutout 442a and the negative electrode cutout 442b.

[0045] (fixed part) The fixing portion 5 is a clip-like member that detachably fixes the sheet-like battery 4 to the substrate 2. An example of the fixing portion 5 is shown in Figures 1 to 3 and 6. Figure 6 is a partial enlarged view of Figure 3. The fixing portion 5 is connected to the substrate 2. In this embodiment, the fixing portion 5 has a fixing portion main body 6, a pressing portion 7, and an operating portion 8. The fixing portion main body 6, the pressing portion 7, and the operating portion 8 are integrally formed from, for example, resin.

[0046] 1 and 2, the fixing part main body 6 has a shape that is long in one direction. As shown in FIG. 3, the fixing part main body 6 has a concave shape in a cross-sectional view. More specifically, as shown in FIG. 6, the fixing part main body 6 has a plate-shaped lower wall portion 61 that extends in the longitudinal direction, which is the one direction, a plate-shaped upper wall portion 62 that is arranged parallel to the lower wall portion 61, and a plate-shaped side wall portion 63 that connects the lower wall portion 61 and the upper wall portion 62. The lower wall portion 61, the side wall portion 63, and the upper wall portion 62 form a groove 6a that extends in the longitudinal direction of the fixing part main body 6.

[0047] As shown in FIG. 6 , the end of the substrate 2 on the side of the first side 2a is inserted into the groove 6a. The lower surface 22 of the substrate 2 inserted into the groove 6a contacts the inner surface of the lower wall portion 61. The end surface of the substrate 2 on the side of the first side 2a inserted into the groove 6a contacts the inner surface of the side wall portion 63. The upper surface 21 of the substrate 2 inserted into the groove 6a is separated from the inner surface of the upper wall portion 62. This forms a space S surrounded by the upper surface 21 of the substrate 2, the inner surfaces of the side wall portions 63 of the fixing part main body 6, and the inner surface of the upper wall portion 62 of the fixing part main body 6. The end of the sheet-like battery 4 on the side of the first side 4a is inserted into the space S.

[0048] As shown in FIG. 2, in this embodiment, the length L2 of the fixing part main body 6 in the longitudinal direction is equal to the length L1 of the sheet-like battery 4 in the second direction.

[0049] The pressing portion 7 is plate-shaped and extends in the longitudinal direction of the fixing portion main body 6. One end of the pressing portion 7 in the width direction, which is a direction intersecting the longitudinal direction, is connected to the tip of the upper wall portion 62 of the fixing portion main body 6. As shown by the dashed line in FIG. 3, the pressing portion 7 is rotatable relative to the fixing portion main body 6, with the tip of the upper wall portion 62 as the center of rotation. Hereinafter, of the rotation directions of the pressing portion 7, the direction in which the pressing portion 7 faces the inner surface of the upper wall portion 62 is referred to as the fixing direction D1, and the opposite direction is referred to as the release direction D2.

[0050] The length of the pressing portion 7 in the width direction is shorter than the distance between the upper surface 21 of the substrate 2 inserted into the groove 6a and the inner surface of the upper wall portion 62. Therefore, the rotation range of the pressing portion 7 includes the range within the space S.

[0051] 3 shows the state in which the pressing portion 7 has rotated to the maximum in the fixing direction D1. In this state, the gap between the tip of the pressing portion 7 and the upper surface 21 of the substrate 2 is smaller than, for example, the thickness of the sheet-type battery 4. As a result, when the pressing portion 7 has rotated to the maximum in the fixing direction D1, the tip of the pressing portion 7 can press the sheet-type battery 4 toward the substrate 2. This allows the sheet-type battery 4 to be fixed to the substrate 2.

[0052] In this way, the pressing portion 7 can press the sheet-type battery 4 toward the substrate 2 by rotating in the fixed direction D1. In other words, the pressing portion 7 can move to a pressing position where it can press the sheet-type battery 4 toward the substrate 2.

[0053] By rotating in the release direction D2, the pressing portion 7 moves to a position parallel to the upper wall portion 62, for example, as shown by the dashed line in Figure 3. As described above, the upper surface 21 of the substrate 2 and the inner surface of the upper wall portion 62 are separated. Therefore, by rotating the pressing portion 7 to the position shown by the dashed line in Figure 3, the pressing portion 7 moves away from the sheet-shaped battery 4, and the pressing state of the sheet-shaped battery 4 is released. In other words, the pressing portion 7 can move to a non-pressing position away from the sheet-shaped battery 4.

[0054] The operating unit 8 is plate-shaped and extends in the longitudinal direction of the fixed unit main body 6. One end of the operating unit 8 in the width direction, which is a direction intersecting the longitudinal direction, is connected to one end of the pressing unit 7 in the width direction. The operating unit 8 is integral with the pressing unit 7 and rotates relative to the fixed unit main body 6 around the tip of the upper wall portion 62 as the center of rotation. In other words, the operating unit 8 can move the pressing unit 7 between a pressing position and a non-pressing position.

[0055] As shown in FIG. 3, in a cross-sectional view of the fixing portion 5, the operating portion 8 and the pressing portion 7 are connected in an L-shape. Specifically, in the cross-sectional view, the operating portion 8 and the pressing portion 7 are connected so that the angle of the pressing portion 7 on the fixing direction D1 side relative to the operating portion 8 is an acute angle. With this configuration, when the pressing portion 7 is in the pressing position, the operating portion 8 comes into contact with one surface of the sheet-type battery 4 in the thickness direction. Therefore, the operating portion 8 can restrict the pressing portion 7 from further rotating in the fixing direction D1.

[0056] The pressing portion 7 is pressed toward the upper wall portion 62 by the reaction force of the sheet-type battery 4 pressed by the pressing portion 7. That is, the pressing portion 7 is pressed toward the fixing direction D1. The rotation of the pressing portion 7 toward the upper wall portion 62 in the fixing direction D1 is restricted by the operating portion 8. Therefore, the pressing state of the sheet-type battery 4 by the pressing portion 7 is maintained.

[0057] As described above, the longitudinal length L2 of the fixing portion main body 6 is equal to the length L1 of the sheet-shaped battery 4 in the second direction. Therefore, the longitudinal length of the inner surface of the side wall 63 is also L2. Therefore, by bringing the first side 4a of the sheet-shaped battery 4 into contact with the inner surface of the side wall 63 and aligning the first side 4a of the sheet-shaped battery 4 with the side wall 63 in the second direction, the position of the first side 4a of the sheet-shaped battery 4 and the position of the first side 2a of the substrate 2 can be aligned in the first and second directions.

[0058] As described above, when the position of the first side 4a of the sheet-type battery 4 and the position of the first side 2a of the substrate 2 are aligned in the first and second directions, the positive electrode cutout 442a exposing the positive electrode terminal exposed portion 412a and the negative electrode cutout 442b exposing the negative electrode terminal exposed portion 422a face each other in the thickness direction, and the connection portion 31 of the conductive path 3 faces each other.

[0059] Therefore, the inner surface of the side wall portion 63 of the fixing portion main body 6 functions as a positioning portion that positions the sheet-type battery 4 relative to the substrate 2 so that the positive terminal exposed portion 412a and the negative terminal exposed portion 422a of the sheet-type battery 4 face the connection portion 31 of the conductive path 3.

[0060] In this embodiment, the first side 4a, which is part of the outer edge of the sheet-type battery 4, contacts the inner surface of the side wall 63. Therefore, the inner surface of the side wall 63 of the fixing part main body 6 corresponds to the contact part of the positioning part.

[0061] With the sheet-shaped battery 4 positioned relative to the substrate 2 by the side wall 63 of the fixing portion main body 6, the tip of the pressing portion 7 rotated to the maximum in the fixing direction D1 contacts a portion of the outer casing 44 of the sheet-shaped battery 4 that is located on the opposite side of the thickness of the sheet-shaped battery 4 from the positive electrode terminal exposed portion 412a and the negative electrode terminal exposed portion 422a. In other words, the pressing portion 7 presses the opposite portion toward the substrate 2. This brings the positive electrode terminal exposed portion 412a and the negative electrode terminal exposed portion 422a of the sheet-shaped battery 4 into electrical contact with the connection portion 31 of the conductive path 3.

[0062] Therefore, the fixing portion 5 having the above configuration can electrically connect the sheet-type battery 4 to the conductive path 3 and can also fix the sheet-type battery 4 to the substrate 2.

[0063] In this configuration, the pressing portion 7 presses the exterior body 44. That is, the positive electrode terminal 412 and the negative electrode terminal 422 contact the connection portion 31 of the conductive path 3 by being sandwiched in the thickness direction between the exterior body 44 of the sheet-type battery 4 and the substrate 2. Therefore, the connection state between the conductive path 3 and the sheet-type battery 4 can be stabilized compared to a configuration in which the positive electrode terminal and the negative electrode terminal are directly sandwiched in the thickness direction by the fixing portion.

[0064] Furthermore, the pressing portion 7 does not come into contact with the positive electrode terminal 412 and the negative electrode terminal 422. Therefore, the positive electrode terminal 412 and the negative electrode terminal 422 are prevented from being deformed or otherwise damaged by contact with the pressing portion 7.

[0065] Furthermore, by rotating the operating unit 8 in the release direction D2, the pressing unit 7 can be switched to a non-pressing state in which it is not pressing the exterior body 44 of the sheet-type battery 4. In the non-pressing state, the sheet-type battery 4 can be easily removed from the substrate 2. This allows the sheet-type battery 4 to be easily attached and detached to the substrate 2, and provides a configuration in which the connection between the substrate 2 and the sheet-type battery 4 is unlikely to change when the sheet-type battery 4 is attached.

[0066] Furthermore, in this embodiment, the operating unit 8 moves the pressing unit 7 toward the pressing position by rotating in a direction toward the substrate 2, and moves the pressing unit 7 toward the non-pressing position by rotating in a direction away from the substrate 2. In other words, when the sheet-type battery 4 is fixed to the substrate 2, the operating unit 8 is closer to the substrate 2 than when the sheet-type battery 4 is not fixed to the substrate 2. This allows the thickness of the fixing unit 5 to be reduced when the sheet-type battery 4 is fixed to the substrate 2. Therefore, a power supply device 1 with a small thickness can be achieved when the sheet-type battery 4 is fixed to the substrate 2.

[0067] (How to install and remove sheet batteries) Next, the direction in which the sheet-type battery 4 is attached to and detached from the substrate 2 will be described with reference to FIGS.

[0068] To remove the sheet-type battery 4 fixed to the substrate 2, rotate the operating unit 8 in the release direction D2 while the pressing unit 7 is in the pressing position, as shown in Figure 3. This moves the pressing unit 7 to the non-pressing position, as shown in Figure 7, and the pressing unit 7 moves away from the sheet-type battery 4. This allows the sheet-type battery 4 to be removed from the substrate 2, as shown in Figure 8. In this way, the sheet-type battery 4 can be removed from the substrate 2 with a simple operation.

[0069] When attaching the sheet-shaped battery 4 to the substrate 2, the pressing portion 7 is in the non-pressing position as shown in Fig. 8, and the sheet-shaped battery 4 is inserted into the space S of the fixing portion 5 as shown in Fig. 7. At this time, the sheet-shaped battery 4 is positioned so that the first edge 4a of the sheet-shaped battery 4 contacts the inner surface of the side wall portion 63 and does not protrude in the second direction from the inner surface of the side wall portion 63. This allows the positive terminal exposed portion 412a of the positive terminal 412 and the negative terminal exposed portion 422a of the negative terminal 422 to face the connection portion 31 of the conductive path 3 in the thickness direction.

[0070] Next, the operating unit 8 is rotated in the fixing direction D1 to move the pressing unit 7 to the pressing position as shown in Figure 3. This fixes the sheet-type battery 4 to the substrate 2, and electrically connects the conductive paths 3 formed on the substrate 2 to the positive terminal 412 and negative terminal 422 of the sheet-type battery 4. In this way, the sheet-type battery 4 can be attached to the substrate 2 with a simple operation.

[0071] The power supply device 1 according to the present embodiment described above includes a substrate 2, a connection portion 31 for a conductive path 3 formed on the upper surface 21, which is one surface of the substrate 2 in the thickness direction, a sheet-like battery 4 secured to the upper surface 21 of the substrate 2 in a state overlapping in the thickness direction, and a fixing portion 5 for detachably fixing the sheet-like battery 4 to the upper surface 21 of the substrate 2. The sheet-like battery 4 includes a positive electrode 41 having a positive terminal 412, a negative electrode 42 having a negative terminal 422, and an exterior body 44 that houses a portion of each of the positive electrode 41 and the negative electrode 42. The positive electrode terminal 412 has a positive electrode terminal exposed portion 412a exposed from the exterior body 44 on one or the other side of the sheet-like battery 4 in the thickness direction, which faces the substrate 2. The negative electrode terminal 422 has a negative electrode terminal exposed portion 422a exposed from the exterior body 44 on one or the other side of the sheet-like battery 4 in the thickness direction, which faces the substrate 2.

[0072] The fixing part 5 includes a fixing part main body 6 connected to the substrate 2, a positioning part provided on the fixing part main body 6 and configured to position the sheet-shaped battery 4 relative to the substrate 2 so that the positive electrode terminal exposed part 412a and the negative electrode terminal exposed part 422a face the connection part 31 of the conductive path 3, and a pressing part 7 provided on the fixing part main body 6 so that, when the sheet-shaped battery 4 is positioned relative to the substrate 2 by the positioning part, the part of the outer casing 44 of the sheet-shaped battery 4 that is located on the opposite side of the thickness of the sheet-shaped battery 4 from the positive electrode terminal exposed part 412a and the negative electrode terminal exposed part 422a is in contact with the connection part 31 of the conductive path 3.

[0073] As a result, the pressing portion 7 can press the portion of the exterior body 44 located on the opposite side of the positive electrode terminal exposed portion 412a and the negative electrode terminal exposed portion 422a toward the connection portion 31 of the conductive path 3. This allows the positive electrode terminal exposed portion 412a and the negative electrode terminal exposed portion 422a of the sheet-shaped battery 4 to come into contact with the connection portion 31 of the conductive path 3. This allows the sheet-shaped battery 4 to be electrically connected to the conductive path 3. Furthermore, the pressing of the pressing portion 7 can fix the sheet-shaped battery 4 to the substrate 2. This allows for a configuration in which the operation of the pressing portion 7 can fix the sheet-shaped battery 4 to the substrate 2 and electrically connect the conductive path 3 formed on the substrate 2 to the sheet-shaped battery 4.

[0074] Furthermore, the pressing portion 7 presses the portions of the exterior body 44 that cover the positive terminal 412 and the negative terminal 422. Therefore, the pressing portion 7 does not come into contact with the positive terminal 412 and the negative terminal 422 of the sheet-type battery 4. This prevents the positive terminal 412 and the negative terminal 422 from being deformed or otherwise damaged by contact with the pressing portion 7.

[0075] Therefore, it is possible to provide a configuration in which the sheet-type battery 4 can be easily attached to the substrate 2, and the connection between the substrate 2 and the sheet-type battery 4 is unlikely to change when the sheet-type battery 4 is attached.

[0076] In this embodiment, the positioning portion has a contact portion that contacts the first side 4a of the sheet-type battery 4. In this embodiment, the contact portion is realized by the inner surface of the side wall portion 63.

[0077] This allows the sheet-shaped battery 4 to be positioned at a predetermined position relative to the substrate 2 with the first side 4a of the sheet-shaped battery 4 in contact with the contact portion. Therefore, the sheet-shaped battery 4 can be positioned relative to the substrate 2 easily and accurately.

[0078] In this embodiment, the sheet-shaped battery 4 is rectangular. The inner surface of the side wall 63, which is the contact portion, extends along the first side 4a of the sheet-shaped battery 4 and contacts the first side 4a. The longitudinal length of the inner surface of the side wall 63 is the same as the length of the first side 4a of the sheet-shaped battery 4.

[0079] By aligning the first side 4a of the sheet-shaped battery 4 with the inner surface of the side wall 63, which is the contact portion, in the longitudinal direction of the inner surface of the side wall 63, the sheet-shaped battery 4 can be easily positioned relative to the substrate 2.

[0080] In this embodiment, the pressing portion 7 is provided so as to be movable relative to the fixing portion main body 6 between a pressing position where it presses the portion of the outer casing 44 that is located on the opposite side of the thickness direction of the sheet-type battery 4 from the positive terminal exposed portion 412a and the negative terminal exposed portion 422a toward the substrate 2, and a non-pressing position away from the outer casing 44.

[0081] A configuration can be realized in which the sheet-type battery 4 is fixed to the substrate 2 when the pressing portion 7 is in the pressing position, and the sheet-type battery 4 is released from the substrate 2 when the pressing portion 7 is in the non-pressing position. Therefore, by switching the position of the pressing portion 7, a configuration can be provided in which the sheet-type battery 4 can be attached to and detached from the substrate 2.

[0082] In this embodiment, the fixing part 5 has an operating part 8 that moves the pressing part 7 relative to the fixing part main body 6 between a pressing position and a non-pressing position.

[0083] This allows the pressing portion 7 to be easily moved between the pressing position and the non-pressing position, thereby improving the workability of attaching and detaching the sheet-type battery 4 to and from the substrate 2.

[0084] In this embodiment, the operating unit 8 is rotatable relative to the fixed unit main body 6 around a rotation axis parallel to the substrate 2, and extends in the radial direction of the rotation axis when viewed in the axial direction of the rotation axis. The operating unit 8 moves the pressing unit 7 toward the pressing position by rotating in a direction approaching the substrate 2, and moves the pressing unit 7 toward the non-pressing position by rotating in a direction away from the substrate 2.

[0085] When the pressing portion 7 is moved to the pressing position, the operating portion 8 approaches the substrate 2. Therefore, when the pressing portion 7 is in the pressing position, a fixing portion 5 with a smaller distance between the operating portion 8 and the substrate 2 can be realized compared to when the pressing portion 7 is in the non-pressing position. Therefore, a power supply device 1 with a small dimension in the thickness direction of the substrate 2 can be realized with the sheet-type battery 4 attached.

[0086] (Other embodiments) Although the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiments, and it is possible to appropriately modify the above-described embodiments within the scope of the spirit of the present invention.

[0087] In the above embodiment, the substrate 2 is rectangular when viewed in the thickness direction. However, the substrate may have other shapes when viewed in the thickness direction. For example, the substrate may have a polygonal shape, a closed curve shape, a circle shape, or an ellipse shape when viewed in the thickness direction.

[0088] In the above embodiment, the sheet-type battery 4 has a rectangular shape when viewed in the thickness direction. However, the sheet-type battery may have other shapes when viewed in the thickness direction. For example, the sheet-type battery may have a polygonal shape, a closed curve shape, a circle shape, or an ellipse shape when viewed in the thickness direction.

[0089] In the above embodiment, the positive electrode terminal 412 is plate-shaped. However, the positive electrode terminal does not have to be plate-shaped. For example, the positive electrode terminal may be mesh-shaped.

[0090] In the above embodiment, the negative electrode terminal 422 is plate-shaped. However, the negative electrode terminal does not have to be plate-shaped. For example, the negative electrode terminal may be mesh-shaped.

[0091] In the above embodiment, the length L1 of the sheet-type battery 4 in the second direction is equal to the length of the substrate 2 in the second direction. However, the length of the sheet-type battery in the second direction may be shorter than the length of the substrate 2 in the second direction.

[0092] In the embodiment, the second sheet 442 has a positive electrode cutout 442a that exposes a portion of the other side in the thickness direction of the positive electrode terminal 412, and a negative electrode cutout 442b that exposes a portion of the other side in the thickness direction of the negative electrode terminal 422. However, the second sheet may have a through hole instead of a cutout. The through hole may expose a portion of the other side in the thickness direction of the positive electrode terminal and a portion of the other side in the thickness direction of the negative electrode terminal.

[0093] In the embodiment, the second sheet 442 has two cutouts on the first side 4a that expose a portion of the other thickness side of each of the positive electrode terminal 412 and the negative electrode terminal 422. However, the second sheet may have cutouts on the entire first side as long as the sealing performance can be maintained.

[0094] In the above embodiment, the positive terminal 412 and the negative terminal 422 extend in the same direction relative to the positive and negative current collectors. However, the positive and negative terminals may extend in different directions.

[0095] The configuration of the fixing unit 5 in the above embodiment is merely an example. The fixing unit may have other configurations as long as it includes a fixing unit main body connected to the substrate, a positioning portion provided on the fixing unit main body and configured to position the sheet-type battery relative to the substrate so that the exposed positive and negative terminal portions face the conductive paths, and a pressing portion provided on the fixing unit main body to press a portion of the outer casing of the sheet-type battery located on the opposite side of the sheet-type battery's positive and negative terminal portions in the thickness direction toward the substrate so that the exposed positive and negative terminal portions of the sheet-type battery contact the conductive paths when the sheet-type battery is positioned relative to the substrate by the positioning portion. For example, the fixing unit may be a clip-shaped member that clamps the substrate and sheet-type battery in the thickness direction.

[0096] In the above embodiment, the fixing part 5 has a positioning portion realized by the inner surface of the side wall portion 63 of the fixing part main body 6. However, the positioning portion of the fixing part may have other configurations as long as it is configured to be able to position the sheet-shaped battery on the substrate so that the exposed positive and negative terminal portions of the sheet-shaped battery face the conductive path in the thickness direction. For example, the sheet-shaped battery may have a through-hole penetrating through the thickness direction, and the fixing part may have a protrusion that is inserted into the through-hole.

[0097] The configuration of the pressing portion 7 of the fixing portion 5 in the above embodiment is one example. The pressing portion may have another configuration as long as it is provided on the fixing portion main body so as to be capable of pressing a portion of the outer casing of the sheet-type battery located on the opposite side of the positive and negative terminal exposed portions in the thickness direction of the sheet-type battery toward the substrate so that the positive and negative terminal exposed portions of the sheet-type battery come into contact with the conductive paths. For example, the pressing portion may be a spring-like member that presses a portion of the outer casing of the sheet-type battery located on the opposite side toward the substrate.

[0098] In the above embodiment, the fixing part 5 has an operating part 8 for operating the pressing part 7. However, the fixing part does not have to have an operating part.

[0099] In the above embodiment, the longitudinal length of the inner surface of the side wall 63 of the fixing part main body 6 is equal to the longitudinal length L2 of the fixing part main body 6. The longitudinal length L2 of the fixing part main body 6 is equal to the length L1 of the sheet-shaped battery 4 in the second direction. Therefore, the longitudinal length of the inner surface of the side wall 63 of the fixing part main body 6 is equal to the length L1 of the sheet-shaped battery 4 in the second direction. However, the longitudinal length of the inner surface of the side wall portion of the fixing part main body, which functions as a contact portion with which the first edge of the sheet-shaped battery contacts, may be equal to the length of the sheet-shaped battery in the second direction. In other words, the longitudinal length of the fixing part main body may be longer than the length of the sheet-shaped battery in the second direction. For example, the fixing part main body may have portions that close both longitudinal ends of the groove formed by the inner surfaces of the upper wall portion, the inner surface of the side wall portion, and the inner surface of the lower wall portion.

[0100] In the above embodiment, the sheet-like battery 4 is fixed to the substrate 2 by a fixing portion 5 connected to the substrate 2. However, the substrate and the sheet-like battery may be fixed by a fixing portion while overlapping each other in the thickness direction. [Industrial Applicability]

[0101] The present invention can be used in a power supply device in which the power supply source is a sheet-type battery. [Explanation of symbols]

[0102] 1 Power supply 2 boards 2a First side 21 Top surface (one side surface in thickness direction) 22 Bottom surface (other side in thickness direction) 3 Conductive Path 31 Connection 4. Sheet-type batteries 4a First side (part of the outer edge) 41 Positive electrode 412 Positive terminal 412a Positive terminal exposed part 42 Negative electrode 422 Negative terminal 422a Negative terminal exposed part 44 Exterior body 441 Sheet 1 442 2nd Sheet 442a Positive electrode notch 442b Negative electrode notch 5 Fixed part 6 Fixed part main body 6a groove 61 Lower wall part 62 Upper wall 63 Side wall (positioning part) 7 Pressing part 8 Control section D1 Fixed direction D2 Release direction L1: Length of the sheet battery in the second direction (length of one side of the sheet battery) L2: Length of the fixed part in the longitudinal direction (length of the contact part in the extension direction) S space

Claims

1. A substrate; a conductive path formed on one surface of the substrate in a thickness direction; a sheet-like battery fixed to one side of the substrate in a thickness direction in a state overlapping the substrate in the thickness direction; a fixing portion that detachably fixes the sheet-type battery to one side of the substrate in the thickness direction; A power supply device comprising: The sheet-type battery is a positive electrode having a positive electrode terminal; a negative electrode having a negative electrode terminal; an exterior body that accommodates a portion of each of the positive electrode and the negative electrode; and The positive electrode terminal is a positive electrode terminal exposed portion exposed from the exterior body on one side of the sheet-type battery in a thickness direction facing the substrate, The negative electrode terminal is a negative electrode terminal exposed portion exposed from the exterior body on one side of the sheet-type battery in a thickness direction facing the substrate, The fixing portion is a fixed portion main body connected to the substrate; a positioning portion provided on the fixing portion main body, which positions the sheet-type battery relative to the substrate so that the positive electrode terminal exposed portion and the negative electrode terminal exposed portion face the conductive path; a pressing portion provided on the fixing portion main body, the pressing portion being capable of pressing a portion of the exterior body of the sheet-type battery, which is located on the opposite side of the sheet-type battery thickness direction from the positive electrode terminal exposed portion and the negative electrode terminal exposed portion, toward the substrate, so that the positive electrode terminal exposed portion and the negative electrode terminal exposed portion of the sheet-type battery come into contact with the conductive path when the sheet-type battery is positioned relative to the substrate by the positioning portion; A power supply device comprising:

2. 2. The power supply device according to claim 1, The positioning unit is a contact portion that contacts a part of the outer edge of the exterior body; power supply.

3. 3. The power supply device according to claim 2, The sheet-type battery is It is rectangular, The contact portion is extending along one edge of the sheet-like battery and in contact with the one edge; The length of the contact portion in the extension direction is The length is the same as the length of one side of the sheet-type battery. power supply.

4. 4. The power supply device according to claim 1, The pressing portion is the fixing portion main body is provided so as to be movable between a pressing position where the portion of the exterior body located on the opposite side is pressed toward the substrate and a non-pressing position away from the exterior body. power supply.

5. 5. The power supply device according to claim 4, The fixing portion is an operating portion that moves the pressing portion between the pressing position and the non-pressing position relative to the fixing portion main body; power supply.

6. 6. The power supply device according to claim 5, The operation unit includes: a rotation axis that is parallel to the substrate and that is rotatable relative to the fixed portion main body, and that extends in a radial direction of the rotation axis when viewed in the axial direction of the rotation axis; The pressing unit is moved toward the pressing position by rotating in a direction toward the substrate, and the pressing unit is moved toward the non-pressing position by rotating in a direction away from the substrate. power supply.

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