Substrate with tab lead and battery module

Abstract

To provide a substrate with tab leads that can further reduce the thickness of the entire electronic module.SOLUTION: A substrate 11 with tab leads includes: a substrate unit 40 having a substrate 20 having mounting surfaces 22a, 23a, and an electronic component 30 mounted on the mounting surface of the substrate; and a first tab lead 60 and a second tab lead 70 connected to the mounting surface of the substrate. The first tab lead and the second tab lead hold a battery 12 sandwiched between them in the thickness direction T of the substrate, and hold the battery such that the thickness center line C1 of the entire substrate unit along the thickness direction is included within the thickness H range of the battery along the thickness direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a substrate with tab leads and a battery module. [Background technology]

[0002] Electronic modules in which electronic components including various elements are mounted on a substrate are being required to be further miniaturized and thinned to accommodate the miniaturization and thinning of electronic devices in which the electronic modules are mounted. In particular, in consideration of application to ultra-small IOT (Internet of Things) devices, there is an even stronger demand for electronic modules to be smaller and thinner.

[0003] In the case of a substrate and a battery that constitute an electronic module, for example, when the battery is directly mounted on the substrate, a battery with tab leads may be used. A typical battery with tab leads includes a positive tab lead that is electrically connected to the positive electrode side of the battery, and a negative tab lead that is electrically connected to the negative electrode side of the battery. In many cases, one of the positive and negative tab leads is a flat tab lead that is not bent or deformed, while the other tab lead is a Z-shaped tab lead in side view that is bent and deformed along the way. For this reason, this type of battery with tab leads is often mounted on one side of a circuit board, because the other tab lead is formed in a Z shape when viewed from the side, making it possible to connect (fix) one tab lead together with the other tab lead to one side of the circuit board by soldering or the like.

[0004] It is also known that when mounting a battery with tab leads on a substrate, a pair of tab leads is connected to the substrate while the battery is housed in a battery housing hole formed in the substrate, as shown in Patent Document 1 below, for example. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2017-183004 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when a battery with tab leads is mounted on one side of a board, the thickness of the battery itself is added to the thickness of the board, which increases the thickness of the entire electronic module and hinders efforts to make it thinner (lower in height). In particular, the battery itself is thicker than the electronic components, and therefore has a large impact on the thickness of the electronic module. In other words, the battery contributes significantly to the overall thickness of the electronic module. Therefore, a structure in which the thickness of the battery is simply added to the thickness of the substrate is not desirable from the perspective of slimming down.

[0007] In contrast, for example, in the structure described in Patent Document 1, the battery is housed in a battery housing hole, so the amount of battery protrusion from the board can be reduced by the thickness of the board. However, even in this case, the battery protrudes in one direction from one side of the board, so the overall thickness of the electronic module still increases. Therefore, the challenge of making the electronic module thinner remains.

[0008] The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a substrate with tab leads and a battery module that can further reduce the thickness of the entire electronic module. [Means for solving the problem]

[0009] (1) A substrate with tab leads according to the present invention comprises a substrate unit having a mounting surface, an electronic component mounted on the mounting surface of the substrate, and a first tab lead and a second tab lead connected to the mounting surface of the substrate, wherein the first tab lead and the second tab lead hold a battery sandwiched between them in the thickness direction of the substrate, and hold the battery so that the thickness center line of the entire substrate unit along the thickness direction is included within the thickness range of the battery along the thickness direction.

[0010] The tab lead-attached substrate according to the present invention utilizes the first and second tab leads connected to the substrate to sandwich and hold the battery in the thickness direction of the substrate. In particular, the battery is held so that the center line of the thickness of the entire substrate unit, including the substrate on which various electronic components are mounted, is contained within the battery's thickness range, preventing the battery from significantly protruding in one direction from one side of the substrate, as in the past. This makes it easier to reduce the thickness of the entire unit (battery module) including the substrate unit and battery, contributing to further thinning of the electronic module even for batteries that have a high contribution (significant impact) to the thickness. Furthermore, the first and second tab leads can function as leads for the battery's electrode terminals.

[0011] (2) The first tab lead and the second tab lead may hold the battery so that a thickness center line of the entire substrate unit along the thickness direction coincides with a thickness center line of the battery along the thickness direction.

[0012] In this case, the first tab lead and the second tab lead can be used to hold the battery so that the thickness center line of the entire substrate unit and the thickness center line of the battery are aligned in the thickness direction of the substrate, thereby further reducing the overall thickness including the substrate unit and the battery.

[0013] (3) The first tab lead and the second tab lead may hold the battery so that a thickness center line of the substrate alone along the thickness direction coincides with a thickness center line of the battery along the thickness direction.

[0014] In this case, the battery is held so that the thickness centerline of the board itself and the thickness centerline of the battery are aligned in the thickness direction of the board, so the overall thickness can be reduced without being affected by the number, size, etc. of various electronic components mounted on the board, which is particularly effective when the number of electronic components mounted is small or the height of the electronic components is low.

[0015] (4) The first tab lead has one end connected to the mounting surface of the substrate and the other end connected to the battery, and the second tab lead has one end connected to the mounting surface of the substrate and the other end connected to the battery and located on the opposite side of the thickness direction from the other end of the first tab lead with the battery sandwiched therebetween, and the first tab lead and the second tab lead may hold the battery between the other end of the first tab lead and the other end of the second tab lead outside the substrate.

[0016] In this case, the other end of the first tab lead, one end of which is connected to the substrate, and the other end of the second tab lead, one end of which is connected to the substrate, are arranged on opposite sides of the substrate in the thickness direction outside the substrate. Therefore, the battery can be held so as to be sandwiched between the other end of the first tab lead and the other end of the second tab lead outside the substrate. Therefore, for example, the battery can be held without forming a battery housing hole or the like in the substrate, which makes it possible to reduce the size of the substrate, for example.

[0017] (5) The first tab lead and the second tab lead may be bent and deformed relative to each other so that the distance between the other ends along the thickness direction is greater than the distance between the one ends along the thickness direction.

[0018] In this case, for example, the first tab lead and the second tab lead formed in a Z shape when viewed from the side can be used, so even a battery that is thicker than the substrate can be stably held.

[0019] (6) The other end of the first tab lead and the other end of the second tab lead may be disposed so that at least a portion of each of them faces each other in the thickness direction.

[0020] In this case, at least a portion of the other end of the first tab lead and at least a portion of the other end of the second tab lead can be arranged to face each other in the thickness direction with the battery sandwiched between them, making it easier to hold the battery by tightly clamping it from both sides in the thickness direction, thereby providing more stable battery retention.

[0021] (7) The other end of the first tab lead and the other end of the second tab lead may be disposed so as not to face each other in the thickness direction.

[0022] In this case, the other end of the first tab lead and the other end of the second tab lead do not face each other in the thickness direction with the battery sandwiched between them, but can be held with the other end offset in the in-plane direction of the board, for example. This makes it possible to hold the battery using the other end of each tab lead with a large gap between them, for example. This makes it easier to prevent unintended conduction (short circuit) between the first tab lead and the second tab lead, and improves product quality.

[0023] (8) The substrate may have a first main surface and a second main surface facing each other in the thickness direction, the mounting surface may have a first mounting surface formed on the first main surface and a second mounting surface formed on the second main surface, and the first tab lead and the second tab lead may have their respective one ends connected to a common mounting surface that is either the first mounting surface or the second mounting surface.

[0024] In this case, the first tab lead and the second tab lead can be connected to a common mounting surface. Therefore, the first tab lead and the second tab lead can be mounted on one side of the board via one end of each tab lead while sandwiching the battery in the thickness direction of the board. This makes it particularly easy to mount the first tab lead and the second tab lead on the board.

[0025] (9) The first tab lead may have an intermediate portion connecting the one end and the other end, and the second tab lead may have an intermediate portion connecting the one end and the other end, and when two directions perpendicular to each other are defined as a first direction and a second direction in a plan view from the thickness direction, the first tab lead and the second tab lead may be arranged parallel to each other along the first direction, and the first tab lead and the second tab lead may be formed such that, in a plan view from the thickness direction, the distance between the intermediate portions along the second direction is larger than the distance between the one ends along the second direction.

[0026] In this case, the distance between the intermediate portions of the first and second tab leads in the second direction is greater than the distance between the ends of the first and second tab leads in the second direction, making it easier to prevent unintended conduction (short circuit) between the first and second tab leads mounted on one side of the board, thereby improving product quality.

[0027] (10) The substrate may have a first main surface and a second main surface facing each other in the thickness direction, the mounting surface may have a first mounting surface formed on the first main surface and a second mounting surface formed on the second main surface, and the first tab lead may have one end connected to the first mounting surface, and the second tab lead may have one end connected to the second mounting surface.

[0028] In this case, the first tab lead and the second tab lead can be mounted on both sides of the board, so that the battery can be held in a state where the first tab lead and the second tab lead sandwich the board from both sides, making it easier to hold the battery more stably. For example, if an external force is applied to the held battery in the thickness direction of the board, the external force acts on one tab lead in a direction that moves it away from the board, while the external force acts on the other tab lead in a direction that presses it against the board. As a result, it is possible to reduce the likelihood of problems such as the first and second tab leads being separated from the board, and improve quality.

[0029] (11) The first tab lead may be connected at one end to the first mounting surface so that the other end of the first tab lead is located on the second main surface side, and the second tab lead may be connected at one end to the second mounting surface so that the other end of the second tab lead is located on the first main surface side.

[0030] In this case, the first tab lead and the second tab lead are arranged so that one end and the other end are located on opposite sides of the substrate. Therefore, when an external force is applied to the held battery in the thickness direction of the substrate, the external force acts on both the first tab lead and the second tab lead in a direction pressing them against the substrate. This makes it even less likely that the first tab lead and the second tab lead will separate from the substrate.

[0031] (12) The first tab lead and the second tab lead may be formed in the same shape.

[0032] In this case, for example, the first tab lead and the second tab lead can be formed using a common molding die, which reduces component costs and leads to lower costs. Furthermore, the first tab lead and the second tab lead can be used as a common electrode terminal lead for the positive and negative electrodes of the battery.

[0033] (13) The battery module according to the present invention is characterized by comprising the substrate with tab leads and a battery held in a state of electrical continuity with the mounting surface via the first tab lead and the second tab lead.

[0034] According to the battery module of the present invention, the battery can be held by using the above-described substrate with tab leads, which reduces the overall thickness of the battery module and therefore contributes to further reducing the thickness of an electronic module that includes the battery module.

[0035] (14) A first fixing portion may be provided between the first tab lead and the battery to fix the first tab lead and the battery to each other, and a second fixing portion may be provided between the second tab lead and the battery to fix the second tab lead and the battery to each other.

[0036] In this case, the first tab lead and the battery can be firmly secured using a first securing portion (e.g., a welded portion formed by spot welding, etc.), and the second tab lead and the battery can be firmly secured using a second securing portion (e.g., a welded portion formed by spot welding, etc.). This prevents the battery held by the first tab lead and the second tab lead from unintentionally becoming detached from the first tab lead and the second tab lead. This improves the product reliability of the battery module.

[0037] (15) The battery pack may include a resin molded portion that seals the first fixing portion, the second fixing portion, and the battery so that they are at least embedded therein, and that is formed to have a predetermined outer shape.

[0038] In this case, the resin molded portion is used to seal the first fixing portion, the second fixing portion, and the battery so that they are at least buried, which further prevents the battery from coming loose and ensures proper conduction between the first tab lead, the second tab lead, and the battery. Furthermore, the resin molded portion can protect the battery, which can prevent, for example, external forces from acting directly on the battery and dust, moisture, and the like from acting directly on the first fixing portion and the second fixing portion. [Effects of the Invention]

[0039] According to the present invention, even when a battery that contributes greatly to thickness is used, it is possible to contribute to further reducing the thickness of the entire electronic module. [Brief explanation of the drawings]

[0040] [Figure 1] 3 is a longitudinal cross-sectional view showing a first embodiment of a battery module including a substrate with tab leads according to the present invention, and corresponds to a longitudinal cross-sectional view taken along line AA shown in FIG. 2. FIG. [Figure 2] FIG. 2 is a top view of the battery module shown in FIG. [Figure 3] 5 is a vertical cross-sectional view showing an example of a conventional battery with tab leads mounted on one side of a substrate, and corresponds to the vertical cross-sectional view taken along line BB shown in FIG. 4. [Figure 4] FIG. 4 is a top view of the battery module shown in FIG. [Figure 5] FIG. 4 is a vertical cross-sectional view of a battery module showing a modified example of the first embodiment. [Figure 6] FIG. 10 is a vertical cross-sectional view of a battery module showing another modified example of the first embodiment. [Figure 7] FIG. 4 is a longitudinal cross-sectional view showing a second embodiment of a battery module including a substrate with tab leads according to the present invention. [Figure 8] FIG. 10 is a top view showing a third embodiment of a battery module including a substrate with tab leads according to the present invention. [Figure 9]11 is a longitudinal cross-sectional view showing a fourth embodiment of a battery module including a substrate with tab leads according to the present invention, and corresponds to a longitudinal cross-sectional view taken along line CC shown in FIG. [Figure 10] FIG. 10 is a top view of the battery module shown in FIG. [Figure 11] FIG. 13 is a top view of a battery module showing a modified example of the fourth embodiment. [Figure 12] FIG. 13 is a top view of a battery module showing another modified example of the fourth embodiment. [Figure 13] FIG. 13 is a top view of a battery module showing another modified example of the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0041] (First embodiment) A first embodiment of a substrate with tab leads and a battery module according to the present invention will be described below with reference to the drawings. 1 and 2, a battery module 10 of this embodiment includes a substrate 11 with tab leads, a battery 12 held by the substrate 11 with tab leads, and a resin molded portion 13. Note that the resin molded portion 13 is not shown in FIG.

[0042] In the battery module 10 of this embodiment, a plurality of various electronic components 30 constituting the battery module 10 are mounted on a printed circuit board 20 (described later), and at least one of the electronic components 30 includes a functional component (not shown). The functional component may be, for example, an SoC (system on chip) that includes a communication function, a control function, etc. Therefore, the battery module 10 itself functions as an electronic module.

[0043] (PCB with tab leads) The tab lead-equipped board 11 comprises a board unit 40 having a printed circuit board (board according to the present invention) 20 and various electronic components 30 mounted on the printed circuit board 20, and a battery holder 50 connected to the printed circuit board 20.

[0044] The printed wiring board 20 includes an insulating bare substrate 21 and printed wiring (first printed wiring 22 and second printed wiring 23) formed on the surface of the bare substrate 21. The raw substrate 21 is a flat rigid substrate having a uniform thickness throughout, and has a first main surface 21a and a second main surface 21b facing each other in the thickness direction T. As shown in FIG. 2, the raw substrate 21 is formed in a rectangular shape in a plan view seen from the thickness direction T, with the first direction L1 being longer than the second direction L2. Note that the first direction L1 and the second direction L2 are perpendicular to each other in a plan view. However, the shape of the raw substrate 21 is not limited to a rectangular shape in a plan view and may be changed as appropriate.

[0045] 1 and 2, a plurality of first printed wirings 22 are formed on a first main surface 21a of a bare substrate 21. The first printed wirings 22 are formed into a predetermined circuit pattern using a conductive material such as copper or gold. The surface of the first printed wirings 22 functions as a first mounting surface 22a. Similarly, a plurality of second printed wirings 23 are formed in a predetermined circuit pattern using a conductive material on the second main surface 21b of the bare substrate 21. The surface of the second printed wirings 23 functions as a second mounting surface 23a.

[0046] The plurality of first printed wirings 22 and the plurality of second printed wirings 23 may be appropriately electrically connected via, for example, through-hole electrodes (not shown) that penetrate the bare substrate 21 in the thickness direction T. Furthermore, the printed circuit board 20 may be configured as a multilayer board such as a through-hole multilayer board or a build-up board.

[0047] The electronic components 30 include, for example, active elements (including various semiconductor elements such as transistors and diodes), passive elements (including resistors, capacitors, condensers, etc.), functional components such as integrated circuits, piezoelectric elements, safety components such as fuses, auxiliary components such as relays and switches, etc. These various electronic components 30 are mounted on the first mounting surface 22a and the second mounting surface 23a using solder or the like, respectively, and are fixed in a state of electrical continuity to the first printed wiring 22 and the second printed wiring 23.

[0048] 1 and 2, the electronic components 30 mounted on the first mounting surface 22a and the second mounting surface 23a are illustrated schematically. Furthermore, the size, arrangement, number, etc. of the electronic components 30 to be mounted may be changed as appropriate depending on the functions required of the battery module 10, etc.

[0049] The substrate unit 40 is a so-called printed circuit board that functions as a so-called electronic circuit by mounting a plurality of electronic components 30 on the printed circuit board 20 described above.

[0050] The battery holder 50 has a first tab lead 60 and a second tab lead 70 connected to the printed circuit board 20 . The first tab lead 60 is disposed on the first main surface 21a of the printed circuit board 20 and connected to the first mounting surface 22a. As a result, the first tab lead 60 is fixed in a state of electrical continuity with the first printed wiring 22. The second tab lead 70 is disposed on the second main surface 21b of the printed circuit board 20 and connected to the second mounting surface 23a. As a result, the second tab lead 70 is fixed in a state of electrical continuity with the second printed wiring 23. Therefore, the second tab lead 70 is disposed on the opposite side of the printed circuit board 20 to the first tab lead 60 in the thickness direction T. The method of connecting the first tab lead 60 and the second tab lead 70 to the first mounting surface 22a and the second mounting surface 23a is not particularly limited, but may be, for example, soldering, thermocompression bonding, ultrasonic welding, etc.

[0051] The first tab lead 60 is formed into a Z-shape in side view by pressing or bending a metal plate having excellent conductivity, such as copper, using a forming die (not shown). The first tab lead 60 is formed to have a uniform thickness over its entirety. However, this is not limited to this, and the first tab lead 60 may be formed to have a thicker or thinner wall in some parts, for example.

[0052] The first tab lead 60 has one end 61 connected to the first mounting surface 22a, the other end 62 connected to the battery 12, and an intermediate portion 63 located between the one end 61 and the other end 62. One end 61 of the first tab lead 60 is disposed at an end of the printed circuit board 20 so as to face the first main surface 21a, and is connected to the first mounting surface 22a. The other end 72 of the first tab lead 60 is disposed outside the printed circuit board 20 and is disposed at a position spaced apart from the one end 61 in the thickness direction T. The middle portion 63 extends from the one end 61 connected to the first mounting surface 22a in a direction away from the printed circuit board 20 along the thickness direction T, and then is bent at a substantially right angle and extends along the first direction L1 so as to be away from the printed circuit board 20, thereby being connected to the other end 62.

[0053] The first tab lead 60 bent in a Z-shape in side view in this manner is cantilevered by being connected to the first mounting surface 22a via one end 61 so that the other end 62 is positioned outside the printed circuit board 20. The width of the other end 62 of the first tab lead 60 in the second direction L2 is formed to be wider than the width of the one end 61 in the second direction L2. In addition, in the illustrated example, the one end 61 and the other end 62 of the first tab lead 60 are formed in a rectangular shape in a plan view, but this is not limited to this. For example, the one end 61 and the other end 62 of the first tab lead 60 may be formed in a circular, elliptical, polygonal, or other shape in a plan view.

[0054] The second tab lead 70 is formed in the same shape as the above-described first tab lead 60. Therefore, the second tab lead 70 is formed in a Z-shape in side view, having one end 71, the other end 72, and an intermediate portion 73. Furthermore, the second tab lead 70 is made of the same material as the first tab lead 60, and is formed to have the same uniform thickness throughout.

[0055] The second tab lead 70, which is bent in a Z-shape in side view, is connected to the second mounting surface 23a via one end 71 so that the other end 72 is positioned outside the printed circuit board 20, and is thereby held in a cantilevered manner. In particular, the second tab lead 70 is positioned so that the other end 72 faces the other end 62 of the first tab lead 60 at a distance in the thickness direction T. More specifically, the other end 62 of the first tab lead 60 and the other end 72 of the second tab lead 70 are positioned so that at least a portion of them face each other in the thickness direction T, with the battery 12 sandwiched between them. Therefore, in a plan view seen from the thickness direction T, the other end 62 of the first tab lead 60 and the other end 72 of the second tab lead 70 are positioned so that they overlap each other, with the battery 12 sandwiched between them.

[0056] This allows the first tab lead 60 and the second tab lead 70 to hold the battery 12 sandwiched between the other end portions 62, 72 outside the printed circuit board 20. Furthermore, the first tab lead 60 and the second tab lead 70 are mutually bent and deformed into a Z shape in side view, and are designed so that the distance between the other end portions 62, 72 in the thickness direction T is larger than the distance between the one end portions 61, 71 in the thickness direction T. Therefore, even a battery 12 whose height (thickness H) is greater than the thickness of the printed circuit board 20 can be held.

[0057] Furthermore, the first tab lead 60 and the second tab lead 70 are arranged parallel to each other along the first direction L1 in a plan view seen from the thickness direction T. As described above, the other end 62 of the first tab lead 60 and the other end 72 of the second tab lead 70 are arranged to overlap each other in a plan view seen from the thickness direction T. In contrast, the one end 61 of the first tab lead 60 and the one end 71 of the second tab lead 70 are arranged to be spaced apart in the second direction L2 in a plan view seen from the thickness direction T.

[0058] (battery) 1 and 2, the battery 12 is a so-called coin (button) type battery having a predetermined diameter and thickness H. The thickness H of the battery 12 is, for example, 1.6 mm or more, and is thicker than the printed circuit board 20. The battery 12 may be a primary battery such as a lithium battery or a silver oxide battery, or may be a secondary battery such as a non-aqueous electrolyte secondary battery.

[0059] The battery 12 is held by the battery holder 50 of the tab lead-attached substrate 11. Specifically, the battery 12 is held by being sandwiched between the other end 62 of the first tab lead 60 and the other end 72 of the second tab lead 70 in the thickness direction T, outside the printed circuit board 20. As a result, the battery 12 is mechanically held by the first tab lead 60 and the second tab lead 70, with the electrodes of the battery 12 being electrically connected to the first tab lead 60 and the second tab lead 70. Therefore, the first tab lead 60 and the second tab lead 70 also function as electrode lead terminals for the battery 12.

[0060] In the illustrated example, the positive electrode (positive electrode can 12a) of battery 12 is electrically connected to the first tab lead 60, and the negative electrode (negative electrode can 12b) is electrically connected to the second tab lead 70. Therefore, the first tab lead 60 functions as a positive electrode lead terminal, and the second tab lead 70 functions as a negative electrode lead terminal. However, the orientation of the battery 12 may be reversed. In this case, the first tab lead 60 functions as the negative electrode lead terminal, and the second tab lead 70 functions as the positive electrode lead terminal.

[0061] Furthermore, a first fixing portion 65 that fixes the first tab lead 60 to the battery 12 is provided between the other end 62 of the first tab lead 60 and the battery 12. Similarly, a second fixing portion 75 that fixes the second tab lead 70 to the battery 12 is provided between the other end 72 of the second tab lead 70 and the battery 12. Specifically, the other end 62 of the first tab lead 60 and the battery 12, and the other end 72 of the second tab lead 70 and the battery 12 are fixed using spot welding, high frequency welding, etc. Therefore, the welded parts, welded parts, etc. formed by these methods function as the first fixing part 65 and the second fixing part 75. In this embodiment, the first fixing portion 65 is fixed between the other end 62 of the first tab lead 60 and the battery 12 so as to be located at the center of the battery 12. Similarly, the second fixing portion 75 is fixed between the other end 72 of the second tab lead 70 and the battery 12 so as to be located at the center of the battery 12.

[0062] (Resin molded part) The resin molded portion 13 is formed by molding a resin for mold sealing into a predetermined outer shape. The resin for mold sealing is not particularly limited, but a thermosetting resin such as an epoxy resin can be used. The molding method for the resin molded portion 13 is not particularly limited, but a molding method similar to injection molding, such as transfer molding, can be used.

[0063] The resin molded portion 13 is formed so as to embed at least the first fixing portion 65, the second fixing portion 75, and the battery 12 therein, and seals the periphery of the battery 12. In this embodiment, the resin molded portion 13 is formed so as to entirely cover the tab lead-attached substrate 11 and the battery 12 from the outside, sealing them inside. The resin forming the resin molded portion 13 may contain metal filler or the like as appropriate in order to adjust, for example, the heat dissipation property and the thermal expansion coefficient.

[0064] (Battery holding position) In the battery module 10 configured as described above, as shown in FIG. 1 , the battery 12 is held between the first tab lead 60 and the second tab lead 70 so that the thickness center line C1 of the entire substrate unit 40 along the thickness direction T is included within the thickness H range of the battery 12 along the thickness direction T. In this embodiment, the battery 12 is held between the first tab lead 60 and the second tab lead 70 so that the thickness center line C1 of the entire board unit 40 along the thickness direction T coincides with the thickness center line C2 of the battery 12 along the thickness direction T. More specifically, the battery 12 is held between the first tab lead 60 and the second tab lead 70 so that the thickness center line C3 of the printed circuit board 20 alone, excluding the electronic components 30, coincides with the thickness center line C2 of the battery 12. In particular, in this embodiment, since the size (height) of the electronic component 30 is small, the thickness center line C3 of the printed circuit board 20 itself coincides with the thickness center line C1 of the entire board unit 40.

[0065] (Function of board with tab leads and battery module) With the battery module 10 configured as described above, the battery holder 50 (first tab lead 60 and second tab lead 70) of the tab lead-attached substrate 11 can be used to hold the battery 12. Specifically, the first tab lead 60 and second tab lead 70 connected to the printed circuit board 20 are used to hold the battery 12 so that the thickness center line C1 of the entire substrate unit 40, which includes the printed circuit board 20 on which various electronic components 30 are mounted, is contained within the thickness H of the battery 12. This prevents the battery 12 from significantly protruding in one direction from one side of the printed circuit board 20 as in the past. In particular, in this embodiment, the battery 12 is held so that the thickness center line C1 of the entire board unit 40 and the thickness center line C2 of the battery 12 are aligned with the thickness direction T. This more effectively prevents the battery 12 from protruding in one direction from one side of the printed circuit board 20, thereby reducing the overall thickness of the battery module 10.

[0066] For example, as shown in Figures 3 and 4, in the conventional case where a battery 80 with tab leads is mounted, in which two tab leads 81 are fixed to a battery 12 on one side of a printed circuit board 20, the thickness of the battery 82 is added to the thickness of the printed circuit board 20, resulting in a large overall thickness.

[0067] 1, in the present embodiment, even with the battery 12 that has a high contribution rate (great influence) to the thickness, the overall thickness of the battery module 10 can be reduced compared to conventional methods. This can contribute to reducing the thickness of the battery module 10 that functions as an electronic module. Furthermore, in this embodiment, the batteries 12 are held so that the thickness center line C3 of the printed circuit board 20 alone and the thickness center line C2 of the batteries 12 are aligned in the thickness direction T, which allows the overall thickness of the battery module 10 to be reduced without being affected by the number or size of the various electronic components 30. This is particularly effective when the number of mounted electronic components 30 is small or when the height of the electronic components 30 is low.

[0068] Furthermore, the battery 12 can be held so as to be sandwiched between the other end 62 of the first tab lead 60 and the other end 72 of the second tab lead 70 outside the printed circuit board 20. Therefore, for example, the battery 12 can be held without forming a housing hole or the like in the printed circuit board 20 to house the battery 12. This makes it possible to reduce the size of the printed circuit board 20. Furthermore, because there is no need to form a housing hole or the like in the printed circuit board 20, the space saved can be effectively used for other purposes.

[0069] Furthermore, because the first tab lead 60 and the second tab lead 70 are bent and deformed into a Z-shape in side view, they can stably hold batteries 12 even if they have a thickness H greater than the thickness of the printed circuit board 20. In particular, the amount of bending deformation of the first tab lead 60 and the second tab lead 70 can be adjusted appropriately depending on the thickness H of the battery 12.

[0070] Furthermore, the first tab lead 60 and the second tab lead 70 are positioned on opposite sides of the printed circuit board 20, allowing for double-sided mounting on the printed circuit board 20. This allows the first tab lead 60 and the second tab lead 70 to hold the battery 12 with the printed circuit board 20 sandwiched between them from both sides, making it easier to hold the battery 12 more stably. For example, if an external force is applied to the held battery 12 in the thickness direction T of the printed circuit board 20, the external force acts on one tab lead in a direction that moves it away from the printed circuit board 20, but the external force acts on the other tab lead in a direction that presses it against the printed circuit board 20. As a result, it is possible to reduce the likelihood of problems such as the first tab lead 60 and the second tab lead 70 becoming separated from the printed circuit board 20, thereby improving quality.

[0071] Furthermore, since the first tab lead 60 and the second tab lead 70 are formed in the same shape, the cost of the parts can be reduced, and therefore costs can be reduced.

[0072] Furthermore, the first tab lead 60 and the battery 12 can be firmly fixed using the first fixing portion 65, and the second tab lead 70 and the battery 12 can be firmly fixed using the second fixing portion 75. This prevents the battery 12 held by the first tab lead 60 and the second tab lead 70 from unintentionally becoming detached from the first tab lead 60 and the second tab lead 70. This improves the product reliability of the battery module 10. In addition, in a plan view seen from the thickness direction T, the other end 62 of the first tab lead 60 and the other end 72 of the second tab lead 70 are arranged to overlap each other with the battery 12 in between. Therefore, the battery 12 can be held by being tightly sandwiched from both sides in the thickness direction T, allowing the battery 12 to be held stably.

[0073] Furthermore, the resin molded portion 13 is used to seal the first fixing portion 65, the second fixing portion 75, and the battery 12 so that they are at least buried, which further prevents the battery 12 from coming loose and properly maintains electrical continuity between the first tab lead 60, the second tab lead 70, and the battery 12. Furthermore, the resin molded portion 13 can protect the battery 12, which can prevent, for example, external forces from acting directly on the battery 12 and dust, moisture, and the like from acting directly on the first fixing portion 65 and the second fixing portion 75.

[0074] (Modification of the first embodiment) In the first embodiment, the resin molded portion 13 is formed so as to cover the entire substrate 11 with tab leads and the battery 12 from the outside, but for example, as shown in Figure 5, the resin molded portion 13 may be formed so as to embed the first fixing portion 65, the second fixing portion 75, and the battery 12 inside. Even in this case, it is possible to achieve the same effects as in the first embodiment, and to prevent dust, moisture, and the like from directly acting on the first fixing portion 65 and the second fixing portion 75. It is also possible to reduce the amount of resin used to form the resin molded portion 13, and to reduce the weight.

[0075] (Another modification of the first embodiment) In the first embodiment, an example was described in which the first tab lead 60 and the second tab lead 70 are arranged on opposite sides of the printed circuit board 20 in the thickness direction T, but the present invention is not limited to this case. For example, as shown in FIG. 6, one end 61 of the first tab lead 60 may be connected to the first mounting surface 22a so that the other end 62 of the first tab lead 60 is located on the second main surface 21b side of the printed circuit board 20, and one end 71 of the second tab lead 70 may be connected to the second mounting surface 23a so that the other end 72 of the second tab lead 70 is located on the first main surface 21a side of the printed circuit board 20.

[0076] In this case, the first tab lead 60 and the second tab lead 70 are arranged so that one end 61, 71 and the other end 62, 72 are located on opposite sides of the printed circuit board 20. Therefore, for example, if an external force is applied to the held battery 12 in the thickness direction T of the printed circuit board 20, the external force can be applied to both the first tab lead 60 and the second tab lead 70 in a direction that presses them against the printed circuit board 20. This is preferable because it is even less likely that the first tab lead 60 and the second tab lead 70 will separate from the printed circuit board 20.

[0077] (Second embodiment) Next, a second embodiment of the present invention will be described with reference to the drawings. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0078] 7, in the battery module 90 of this embodiment, for example, one of the multiple electronic components 30 mounted on the first mounting surface 22a of the printed circuit board 20 has a height greater than the other electronic components 30. Therefore, the thickness center line C1 of the entire board unit 40 is shifted toward the first main surface 21a with respect to the thickness center line C3 of the printed circuit board 20 alone.

[0079] The first tab lead 60 of the tab lead-attached substrate 11 is formed so that the other end 62 is farther away from the first main surface 21a by the shift amount than in the first embodiment, corresponding to the shift of the thickness center line C1. Correspondingly, the second tab lead 70 is formed so that the other end 72 is closer to the second main surface 21b by the shift amount than in the first embodiment. As a result, the first tab lead 60 and the second tab lead 70 hold the battery 12 so that the thickness center line C1 of the entire board unit 40 and the thickness center line C2 of the battery 12 are aligned in the thickness direction T. However, even in this embodiment, the battery 12 is held so that the thickness center line C1 of the entire board unit 40 is within the thickness H of the battery 12.

[0080] The battery module 90 of this embodiment can also reduce the overall thickness of the battery module 90, thereby achieving the same effects as the first embodiment and contributing to a thinner electronic module. In this embodiment, the resin molded portion 13 is not shown. Even in this embodiment, the resin molded portion 13 may be formed so as to cover the entire tab lead-attached substrate 11 and the battery 12, or may be formed so as to cover the first fixing portion 65, the second fixing portion 75, and the battery 12.

[0081] (Third embodiment) Next, a third embodiment of the present invention will be described with reference to the drawings. In the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0082] As shown in FIG. 8, in a battery module 95 of this embodiment, the other end 62 of the first tab lead 60 and the other end 72 of the second tab lead 70 are arranged so as not to face each other in the thickness direction T. Specifically, the first tab lead 60 and the second tab lead 70 are arranged so as to be physically spaced apart in the second direction L2 in plan view in the thickness direction T compared to the first embodiment shown in Fig. 2. As a result, one end 61 and an intermediate portion 63 of the first tab lead 60 and one end 71 and an intermediate portion 73 of the second tab lead 70 are arranged so as to have a larger distance W in plan view in the thickness direction T compared to the first embodiment. Accordingly, the other end 62 of the first tab lead 60 and the other end 72 of the second tab lead 70 are arranged spaced apart in the second direction L2, so that they are not opposed to each other in the thickness direction T, i.e., they are arranged in a non-opposing relationship.

[0083] The first fixing portion 65 and the second fixing portion 75 are positioned offset from the center of the battery 12 in the second direction L2, corresponding to the positions of the other end 62 of the first tab lead 60 and the other end 72 of the second tab lead 70.

[0084] In addition to being able to achieve the same effects as in the first embodiment, the battery module 95 of this embodiment is able to hold the batteries 12 by using the other ends 62, 72 while increasing the distance W between the first tab lead 60 and the second tab lead 70. This makes it easier to prevent unintended conduction (short circuit) between the first tab lead 60 and the second tab lead 70, thereby improving product quality.

[0085] (Fourth embodiment) Next, a fourth embodiment of the present invention will be described with reference to the drawings. In the fourth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0086] As shown in FIGS. 9 and 10, a battery module 100 of this embodiment includes a tab lead-attached substrate 110 on which a first tab lead 60 and a second tab lead 70 are mounted on one side. As in the first embodiment, the first tab lead 60 is cantilevered by being connected via one end 61 to the first mounting surface 22a of the first printed wiring 22 formed on the first main surface 21a of the printed circuit board 20.

[0087] Similar to the first tab lead 60, the second tab lead 70 of this embodiment is cantilevered by being connected to the first mounting surface 22a of the first printed wiring 22 via one end 71. Therefore, the first tab lead 60 and the second tab lead 70 are connected to the first mounting surface 22a, which is a common mounting surface, via their respective one ends 61, 71. The first tab lead 60 and the second tab lead 70 are arranged parallel to each other along the first direction L1 in a plan view seen from the thickness direction T. In this case, one end 61 of the first tab lead 60 and one end 71 of the second tab lead 70 are arranged side by side at a predetermined interval W1 in the second direction L2. As a result, the first tab lead 60 and the second tab lead 70 are single-sided mounted on the first main surface 21a of the printed circuit board 20 in a state in which unintended conduction (short circuit) is suppressed.

[0088] Even in this embodiment, the second tab lead 70 is arranged so that the other end 72 faces the other end 72 of the first end at a distance in the thickness direction T. This makes it possible for the first tab lead 60 and the second tab lead 70 to hold the battery 12 sandwiched between the other ends 62, 72 outside the printed circuit board 20.

[0089] The battery module 100 of this embodiment also uses the first tab lead 60 and the second tab lead 70 to hold the batteries 12 so that the thickness center line C1 of the entire board unit 40 is within the thickness H of the batteries 12. Furthermore, the batteries 12 are held so that the thickness center line C1 of the entire board unit 40 and the thickness center line C2 of the batteries 12 are aligned with the thickness direction T. This makes it possible to reduce the thickness of the entire battery module 100. This therefore achieves the same effects as the first embodiment and contributes to making the electronic module thinner. In particular, when the first tab lead 60 and the second tab lead 70 are mounted on one side of the first main surface 21a of the printed circuit board 20, there is an advantage that the mounting is easier than when they are mounted on both sides.

[0090] In this embodiment, the first tab lead 60 and the second tab lead 70 are mounted on one side of the first main surface 21a of the printed circuit board 20, but they may be mounted on one side of the second main surface 21b. Furthermore, in this embodiment, the resin molded portion 13 is not shown. Even in this embodiment, the resin molded portion 13 may be formed so as to cover the entire tab lead-attached substrate 110 and the battery 12, or the resin molded portion 13 may be formed so as to cover the first fixing portion 65, the second fixing portion 75, and the battery 12.

[0091] (Modification of the fourth embodiment) 11, for example, one end 61 and an intermediate portion 63 of the first tab lead 60 and one end 71 and an intermediate portion 73 of the second tab lead 70 may be arranged so that there is an even larger distance W2 between them in a plan view seen in the thickness direction T than in the form shown in Fig. 10. In this case, in the case of single-sided mounting, the first tab lead 60 and the second tab lead 70 can be arranged physically separated in the second direction L2, which further reduces the occurrence of unintended conduction (short circuit).

[0092] (Another modification of the fourth embodiment) Furthermore, as shown in FIG. 12, for example, the intermediate portion 63 of the first tab lead 60 may be formed so as to be spaced apart from one end 71 of the second tab lead 70 along the second direction L2 from one end 61 connected to the first mounting surface 22a, and then bent along the first direction L1. Similarly, the intermediate portion 73 of the second tab lead 70 may be formed so as to be spaced apart from the one end 61 of the first tab lead 60 along the second direction L2 from the one end 71 connected to the first mounting surface 22a, and then bent along the first direction L1.

[0093] In this case, the first tab lead 60 and the second tab lead 70 can be formed so that, when viewed in a plan view from the thickness direction T, the distance W4 between the respective intermediate portions 63, 73 along the second direction L2 is larger than the distance W3 between the respective one end portions 61, 71 of the first tab lead 60 and the second tab lead 70 along the second direction L2. Therefore, the occurrence of unintended conduction (short circuit) between the first tab lead 60 and the second tab lead 70 can be more effectively prevented.

[0094] (Another modification of the fourth embodiment) 13, even when the first tab lead 60 and the second tab lead 70 are mounted on one side, the other end 62 of the first tab lead 60 and the other end 72 of the second tab lead 70 may be arranged so as not to face each other in the thickness direction T. In the illustrated example, similar to the embodiment shown in FIG. 11, the first tab lead 60 and the second tab lead 70 are arranged so as to be spaced apart in the second direction L2 in a plan view seen from the thickness direction T, so that one end 61 and a middle portion 63 of the first tab lead 60 and one end 71 and a middle portion 73 of the second tab lead 70 are arranged with a distance W2 between them. Accordingly, the other end 62 of the first tab lead 60 and the other end 72 of the second tab lead 70 are arranged so as not to face each other in the thickness direction T, that is, so as to be in a non-facing relationship.

[0095] The first fixing portion 65 and the second fixing portion 75 are positioned offset in the second direction L2 from the center of the battery 12, corresponding to the positions of the other end 62 of the first tab lead 60 and the other end 72 of the second tab lead 70.

[0096] Even in this case, it is easy to prevent unintended conduction (short circuit) between the first tab lead 60 and the second tab lead 70, and product quality can be improved.

[0097] Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. The embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. The embodiments and their modifications include, for example, those that can be easily imagined by a person skilled in the art, those that are substantially the same, and those that are equivalent.

[0098] For example, in the above embodiments, the first tab lead 60 and the second tab lead 70 are described as being formed in a Z-shape in side view, but this is not limited to this. The shapes of the first tab lead 60 and the second tab lead 70 may be freely designed as long as they can sandwich and hold the battery 12 in the thickness direction T so that the thickness center line C1 of the entire board unit 40 is included within the thickness H of the battery 12. It is more preferable that the thickness center line C1 of the entire board unit 40 and the thickness center line C2 of the battery 12 coincide with each other.

[0099] Furthermore, in the above embodiments, the battery 12 is held outside the printed circuit board 20, but this is not limited to this. For example, a through-hole for accommodating the battery 12 may be formed in the printed circuit board 20, and with the battery 12 housed in the through-hole, the battery 12 may be sandwiched and held in the thickness direction T so that the thickness center line C1 of the entire board unit 40 is included within the thickness H of the battery 12 (more preferably, so that the thickness center line C1 of the entire board unit 40 and the thickness center line C2 of the battery 12 coincide with each other).

[0100] The present invention further includes the following aspects. <1> a substrate unit having a substrate with a mounting surface and an electronic component mounted on the mounting surface of the substrate; a first tab lead and a second tab lead connected to the mounting surface of the substrate, A substrate with tab leads, characterized in that the first tab lead and the second tab lead hold a battery sandwiched between them in the thickness direction of the substrate, and hold the battery so that the thickness center line of the entire substrate unit along the thickness direction is included within the thickness range of the battery along the thickness direction. <2> <1> In the substrate with tab leads described in A substrate with tab leads, wherein the first tab lead and the second tab lead hold the battery so that a thickness center line of the entire substrate unit along the thickness direction coincides with a thickness center line of the battery along the thickness direction. <3> <2> In the substrate with tab leads described in The first tab lead and the second tab lead hold the battery so that a thickness center line of the substrate alone along the thickness direction coincides with a thickness center line of the battery along the thickness direction. <4> <1> from <3> In the substrate with tab leads according to any one of the above items, the first tab lead has one end connected to the mounting surface of the board and the other end connected to the battery; the second tab lead has one end connected to the mounting surface of the board and another end connected to the battery and located on the opposite side in the thickness direction from the other end of the first tab lead with the battery sandwiched therebetween; The first tab lead and the second tab lead hold the battery between the other end of the first tab lead and the other end of the second tab lead outside the substrate. <5> <4> In the substrate with tab leads described in the first tab lead and the second tab lead are mutually bent and deformed so that the distance between the other ends of the first tab lead and the second tab lead along the thickness direction is larger than the distance between the one ends of the first tab lead and the second tab lead along the thickness direction. <6> <4> or <5> In the substrate with tab leads described in the other end of the first tab lead and the other end of the second tab lead are arranged so that at least a portion of each face each other in the thickness direction. <7> <4> or <5> In the substrate with tab leads described in the other end of the first tab lead and the other end of the second tab lead are arranged so as not to face each other in the thickness direction. <8> <4> from <7> In the substrate with tab leads according to any one of the above items, the substrate has a first main surface and a second main surface facing each other in the thickness direction, the mounting surface includes a first mounting surface formed on the first main surface and a second mounting surface formed on the second main surface; A substrate with tab leads, in which the first tab lead and the second tab lead have their one ends connected to a common mounting surface, which is either the first mounting surface or the second mounting surface. <9> <8> In the substrate with tab leads described in the first tab lead has an intermediate portion connecting the one end and the other end, the second tab lead has an intermediate portion connecting the one end and the other end, when two directions perpendicular to each other are defined as a first direction and a second direction in a plan view seen from the thickness direction, the first tab lead and the second tab lead are arranged parallel to each other along the first direction, A substrate with tab leads, wherein, in a plan view seen from the thickness direction, the first tab lead and the second tab lead are formed so that the distance between the respective intermediate portions along the second direction is larger than the distance between the respective one end portions along the second direction. <10> <4> from <7> In the substrate with tab leads according to any one of the above items, the substrate has a first main surface and a second main surface facing each other in the thickness direction, the mounting surface includes a first mounting surface formed on the first main surface and a second mounting surface formed on the second main surface; The first tab lead has the one end connected to the first mounting surface, The second tab lead is a substrate with tab leads, wherein the one end of the second tab lead is connected to the second mounting surface. <11> <10> In the substrate with tab leads described in the first tab lead has one end connected to the first mounting surface so that the other end of the first tab lead is located on the second main surface side; The second tab lead has one end connected to the second mounting surface so that the other end of the second tab lead is located on the first main surface side. <12> <1> from <11> In the substrate with tab leads according to any one of the above items, the first tab lead and the second tab lead are formed in the same shape; <13> <1> from <12> a substrate with a tab lead according to any one of the above items; a battery held in a state of electrical continuity with the mounting surface via the first tab lead and the second tab lead. <14> <13> In the battery module described in a first fixing portion that fixes the first tab lead and the battery to each other is provided between the first tab lead and the battery; The battery module further comprises a second fixing portion provided between the second tab lead and the battery, the second fixing portion fixing the second tab lead and the battery to each other. <15> <14> In the battery module described in a resin molded portion that seals the first fixing portion, the second fixing portion, and the battery so that they are at least embedded therein, and that is formed to have a predetermined outer shape; [Explanation of symbols]

[0101] H: Battery thickness T: Thickness direction of the board C1: Center line of board unit thickness C2: Center line of battery thickness C3: Center line of thickness of printed circuit board 10, 90, 95, 100... Battery module 11, 110... Board with tab leads 20...Printed circuit board (substrate) 21a...first principal surface 21b…Second principal surface 22a...First mounting surface 23a...Second mounting surface 30...Electronic components 40... Circuit board unit 60...First tab lead 61...One end of the first tab lead 62...other end of first tab lead 70...Second tab lead 71...One end of the second tab lead 72...other end of second tab lead 65...First fixing part 75...Second fixing part

Claims

1. a substrate unit having a substrate with a mounting surface and an electronic component mounted on the mounting surface of the substrate; a first tab lead and a second tab lead connected to the mounting surface of the substrate, A substrate with tab leads, characterized in that the first tab lead and the second tab lead hold a battery by sandwiching it in the thickness direction of the substrate, and hold the battery so that the thickness center line of the entire substrate unit along the thickness direction is included within the thickness range of the battery along the thickness direction.

2. The substrate with tab leads according to claim 1, a substrate with tab leads, wherein the first tab lead and the second tab lead hold the battery so that a thickness center line of the entire substrate unit along the thickness direction coincides with a thickness center line of the battery along the thickness direction.

3. The substrate with tab leads according to claim 2, a substrate with tab leads, the first tab lead and the second tab lead holding the battery such that a thickness center line of the substrate alone along the thickness direction coincides with a thickness center line of the battery along the thickness direction.

4. The substrate with tab leads according to claim 1, the first tab lead has one end connected to the mounting surface of the board and the other end connected to the battery; the second tab lead has one end connected to the mounting surface of the board and another end connected to the battery and located on the opposite side in the thickness direction from the other end of the first tab lead with the battery sandwiched therebetween; a substrate with tab leads, the first tab lead and the second tab lead holding the battery between the other end of the first tab lead and the other end of the second tab lead outside the substrate;

5. The substrate with tab leads according to claim 4, the first tab lead and the second tab lead are mutually bent and deformed so that the distance between the other ends of the first tab lead and the second tab lead along the thickness direction is larger than the distance between the one ends of the first tab lead and the second tab lead along the thickness direction.

6. The substrate with tab leads according to claim 4 or 5, the other end of the first tab lead and the other end of the second tab lead are arranged so that at least a portion of each face each other in the thickness direction.

7. The substrate with tab leads according to claim 4 or 5, the other end of the first tab lead and the other end of the second tab lead are arranged so as not to face each other in the thickness direction.

8. The substrate with tab leads according to claim 4, the substrate has a first main surface and a second main surface facing each other in the thickness direction, the mounting surface includes a first mounting surface formed on the first main surface and a second mounting surface formed on the second main surface; A substrate with tab leads, wherein the first tab lead and the second tab lead have their one ends connected to a common mounting surface, which is either the first mounting surface or the second mounting surface.

9. The substrate with tab leads according to claim 8, the first tab lead has an intermediate portion connecting the one end and the other end, the second tab lead has an intermediate portion connecting the one end and the other end, when two directions perpendicular to each other are defined as a first direction and a second direction in a plan view seen from the thickness direction, the first tab lead and the second tab lead are arranged parallel to each other along the first direction, a substrate with tab leads, wherein, in a plan view seen from the thickness direction, the first tab lead and the second tab lead are formed so that the distance between the respective intermediate portions along the second direction is larger than the distance between the respective one end portions along the second direction.

10. The substrate with tab leads according to claim 4, the substrate has a first main surface and a second main surface facing each other in the thickness direction, the mounting surface includes a first mounting surface formed on the first main surface and a second mounting surface formed on the second main surface; The first tab lead has the one end connected to the first mounting surface, The second tab lead is a substrate with tab leads, wherein the one end of the second tab lead is connected to the second mounting surface.

11. The substrate with tab leads according to claim 10, the first tab lead has one end connected to the first mounting surface so that the other end of the first tab lead is located on the second main surface side; The second tab lead has one end connected to the second mounting surface so that the other end of the second tab lead is located on the first main surface side.

12. The substrate with tab leads according to claim 1, the first tab lead and the second tab lead are formed in the same shape.

13. The substrate with tab leads according to claim 1; a battery held in a state of electrical continuity with the mounting surface via the first tab lead and the second tab lead.

14. The battery module according to claim 13, a first fixing portion that fixes the first tab lead and the battery to each other is provided between the first tab lead and the battery; a second fixing portion that fixes the second tab lead and the battery to each other is provided between the second tab lead and the battery.

15. The battery module according to claim 14, a resin molded portion that seals the first fixing portion, the second fixing portion, and the battery so that they are at least embedded therein, and that is formed to have a predetermined outer shape;

Images