Wiring Module

Abstract

To provide a technology to hold terminals connected to wires in a wiring module to a circuit board.SOLUTION: A wiring module 20 is a wiring module 20 that is attached to a plurality of power storage elements 11, and has an electric wire, a terminal 60 connected to the electric wire, and a circuit board 30, the terminal 60 has a connection portion 63 connected to the circuit board 30 and a press-fit portion 64 different from the connection portion 63, and the circuit board 30 has a connection land to which the connection portion 63 is soldered and a press-fit hole 32, which is located in a different position from the connection land and into which the press-fit portion 64 is pressed.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present disclosure relates to a wiring module. [Background technology]

[0002] High-voltage battery packs used in electric vehicles, hybrid vehicles, and the like typically have a large number of stacked battery cells electrically connected in series or parallel by a wiring module. Such a wiring module can be configured with bus bars connected to the electrode terminals of the battery cells, a printed circuit board, electric wires, and the like. For example, the wiring module may include the connection structure between electric wires and a printed circuit board described in Japanese Patent Laid-Open Publication No. 2009-76224 (Patent Document 1 listed below).

[0003] The connection structure between an electric wire and a printed circuit board described in Patent Document 1 includes a terminal fitting that connects the electric wire and the printed circuit board. The terminal fitting is formed by punching, bending, or the like, a conductive metal plate. The terminal fitting includes an electric wire connection portion that is connected to the electric wire, and a board joint portion that is joined to the printed circuit board. In the configuration of Patent Document 1, a joining material such as cream solder is interposed between the bottom surface of the board joint portion and the surface of the printed circuit board, and is melted in a reflow furnace to join the board joint portion and the printed circuit board. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-76224 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above configuration, after the board joint portion and the printed circuit board are joined, the electric wire is crimped to the electric wire connection portion of the terminal fitting, thereby connecting the electric wire and the printed circuit board. However, unlike the above configuration, there may be cases in which the board joint portion and the printed circuit board are joined after the terminal fitting and the electric wire are connected. In such cases, depending on the connection partner of the electric wire, the terminal fitting may receive a reaction force from the electric wire, which may prevent the board joint portion and the printed circuit board from being joined properly. [Means for solving the problem]

[0006] The wiring module of the present disclosure is a wiring module attached to a plurality of energy storage elements, and comprises electric wires, terminals connected to the electric wires, and a circuit board, the terminals having a connection portion connected to the circuit board and a press-fit portion different from the connection portion, and the circuit board having a connection land to which the connection portion is soldered, and a press-fit hole arranged at a position different from the connection land and into which the press-fit portion is press-fit. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a technique for holding terminals connected to electric wires on a circuit board in a wiring module. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing a vehicle equipped with a power storage module according to a first embodiment. [Figure 2] FIG. 2 is a plan view of the electricity storage module. [Figure 3] FIG. 3 is a partially enlarged plan view of the electricity storage module showing the periphery of the circuit board. [Figure 4] FIG. 4 is a perspective view of the electricity storage module showing the periphery of the circuit board. [Figure 5] FIG. 5 is a plan view of the circuit board. [Figure 6] FIG. 6 is a schematic cross-sectional view taken along line AA in FIG. [Figure 7] FIG. 7 is a perspective view of the terminal. [Figure 8] FIG. 8 is a perspective view showing a connection portion between a terminal and a circuit board. [Figure 9] FIG. 9 is a rear view showing the connection portion between the terminal and the circuit board. [Figure 10] FIG. 10 is a schematic cross-sectional view taken along the line BB in FIG. [Figure 11] FIG. 11 is a schematic cross-sectional view showing the press-fitting of the press-fit portion into the press-fit hole in the cross-section BB of FIG. [Figure 12] FIG. 12 is a rear view of the terminal according to the second embodiment. [Figure 13] FIG. 13 is a cross-sectional view taken along CC in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described.

[0010] (1) The wiring module of the present disclosure is a wiring module attached to a plurality of energy storage elements, and includes electric wires, terminals connected to the electric wires, and a circuit board, the terminals including a connection portion connected to the circuit board and a press-fit portion different from the connection portion, and the circuit board including a connection land to which the connection portion is soldered and a press-fit hole disposed at a position different from the connection land and into which the press-fit portion is press-fit.

[0011] With this configuration, the terminal can be held on the circuit board by press-fitting the press-fit portion into the press-fit hole, which makes it easier to solder the connection portion to the connection land.

[0012] (2) It is preferable that the press-fit portion is elastically deformable in a direction parallel to the surface of the circuit board.

[0013] With this configuration, the press-fit portion is elastically deformable in a direction parallel to the surface of the circuit board, so that the press-fit force when the press-fit portion is press-fitted can be reduced.

[0014] (3) The press-fit portion preferably includes a base portion, an opposing plate portion disposed opposite the base portion, and a bent portion connecting the base portion and the opposing plate portion.

[0015] According to this configuration, it is possible to provide a press-fit portion that is elastically deformable in a direction parallel to the surface of the circuit board with a simple configuration.

[0016] (4) It is preferable that the press-fit portion includes a base and a protruding portion protruding from the base.

[0017] With this configuration, the press-fit portion can be easily configured.

[0018] (5) It is preferable that the terminal has a pressing portion having a surface that intersects with the pressing direction in which the press-fit portion is pressed into the press-fit hole, and that the pressing portion is arranged on the opposite side of the press-fit direction from the press-fit portion.

[0019] With this configuration, by pressing the pressing portion in the press-fitting direction, the press-fit portion can be easily press-fitted into the press-fitting hole.

[0020] (6) It is preferable that the terminals each have a contact portion that contacts the end surface of the circuit board.

[0021] According to this configuration, the contact portion contacts the end surface of the circuit board, thereby enabling the terminal to be positioned relative to the circuit board.

[0022] (7) It is preferable that the terminal has a crimping portion that is crimped to the electric wire.

[0023] According to this configuration, the terminal and the electric wire can be connected by crimping the crimping portion onto the electric wire.

[0024] (8) It is preferable that the press-fit portion is disposed between the connection portion and the crimping portion.

[0025] With this configuration, the press-in portion is arranged between the connection portion and the crimping portion, so even if a reaction force is applied to the electric wire, stress can be prevented from being applied to the connection portion between the connection portion and the circuit board.

[0026] (9) Preferably, the wiring module further includes a bus bar connected to the electrode terminals of the plurality of energy storage elements, and the bus bar is connected to the electric wire.

[0027] With this configuration, the bus bar and the circuit board can be electrically connected.

[0028] (10) It is preferable that the circuit board has a conductive path including the connection land, and that the conductive path is formed on only one side of the circuit board.

[0029] According to this configuration, the conductive paths are provided on only one side of the circuit board, and therefore the manufacturing costs of the wiring module can be reduced compared to when conductive paths are provided on both sides of the circuit board.

[0030] (11) The above-described wiring module is a wiring module for a vehicle that is electrically attached to the plurality of power storage devices mounted on the vehicle.

[0031] [Details of the embodiments of the present disclosure] The present disclosure will be described below with reference to exemplary embodiments. The present disclosure is not limited to these examples, but is defined by the scope of the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0032] <Embodiment 1> A first embodiment of the present disclosure will be described with reference to Figs. 1 to 11. A power storage module 10 including a wiring module 20 of the present embodiment is applied to a power storage pack 2 mounted on a vehicle 1, for example, as shown in Fig. 1. The power storage pack 2 is mounted on the vehicle 1, such as an electric vehicle or a hybrid vehicle, and is used as a drive source for the vehicle 1. In the following description, when multiple identical components are used, reference numerals may be assigned to only some of the components, and the reference numerals for the other components may be omitted.

[0033] As shown in FIG. 1, an electricity storage pack 2 is disposed near the center of a vehicle 1. A PCU 3 (Power Control Unit) is disposed in the front of the vehicle 1. The electricity storage pack 2 and the PCU 3 are connected by a wire harness 4. The electricity storage pack 2 and the wire harness 4 are connected by a connector (not shown). The electricity storage pack 2 has an electricity storage module 10 including a plurality of electricity storage elements 11. The electricity storage module 10 (and the wiring module 20) can be mounted in any orientation, but in the following description, except for FIG. 1, the direction indicated by the arrow Z is assumed to be upward, the direction indicated by the arrow X is assumed to be forward, and the direction indicated by the arrow Y is assumed to be leftward.

[0034] [Electricity storage element, electrode terminal] As shown in FIG. 2, the energy storage module 10 includes a plurality of energy storage elements 11 arranged in a line in the left-right direction, and a wiring module 20 attached to the upper surfaces of the plurality of energy storage elements 11 (the left side of the energy storage module 10 is not shown). The energy storage elements 11 are in the shape of a flat rectangular parallelepiped. An energy storage element (not shown) is housed inside the energy storage element 11. The energy storage elements 11 have positive and negative electrode terminals 12A, 12B on their upper surfaces. There are no particular limitations on the energy storage elements 11, and they may be secondary batteries or capacitors. The energy storage elements 11 in this embodiment are secondary batteries.

[0035] [Wiring module] The wiring module 20 includes a bus bar 21 connected to the electrode terminals 12A, 12B, a first electric wire 22 (an example of an electric wire) connected to the bus bar 21, a circuit board 30, a terminal 60 (see FIG. 8 ) that connects the first electric wire 22 to the circuit board 30, a second electric wire 23 connected to the circuit board 30, and a protector 50 that holds the bus bar 21, the circuit board 30, and the second electric wire 23. As shown in FIG. 2 , the wiring module 20 is attached to the front and rear sides of the plurality of energy storage elements 11. The configuration of the wiring module 20 disposed on the rear side will be described in detail below. Note that the wiring module 20 disposed on the front side is reversed in both the front-to-back and left-to-right directions, but otherwise there is no difference in configuration between the wiring module 20 disposed on the front side and the wiring module 20 disposed on the rear side.

[0036] Protector 50 is made of insulating synthetic resin and has a plate shape. Protector 50 includes busbar accommodating section 51 that accommodates busbar 21, board holding section 52 that holds circuit board 30, and electric wire routing section 53 in which second electric wire 23 is routed. Busbar accommodating section 51 has a frame shape. Connection holes 51A are formed in the lower part of busbar accommodating section 51 for connecting electrode terminals 12A, 12B to busbar 21. As shown in FIG. 3, a peripheral wall of busbar accommodating section 51 is provided with locking sections 51B that hold busbar 21 within busbar accommodating section 51. As shown in FIG. 4, a side wall of busbar accommodating section 51 has a recess 51C that is partially recessed downward. First electric wire 22 is arranged in recess 51C.

[0037] As shown in FIG. 4 , the electric wire routing portion 53 has a groove shape extending in the left-right direction. The board holding portion 52 is arranged between the bus bar accommodating portion 51 and the electric wire routing portion 53. A wire insertion portion 53A is formed in a recessed shape on the groove wall of the electric wire routing portion 53 on the board holding portion 52 side. The second electric wire 23 inserted into the wire insertion portion 53A is connected to the circuit board 30. The board holding portion 52 has a protrusion 52A that is inserted into the insertion hole 31 of the circuit board 30. The protrusion 52A has a cylindrical shape extending in the up-down direction.

[0038] [Busbar] The busbar 21 is made of a conductive metal plate. Examples of metals that form the busbar 21 include copper, copper alloy, aluminum, aluminum alloy, and stainless steel (SUS). As shown in FIG. 2, the busbar 21 has a rectangular shape in a plan view. The busbar 21 and the electrode terminals 12A and 12B are electrically connected by welding. There are busbars 21 that connect the electrode terminals 12A and 12B of adjacent energy storage elements 11, and busbars 21 that are connected to the total positive electrode or total negative electrode of multiple energy storage elements 11, but hereinafter, no particular distinction will be made between them. As shown in FIG. 4, the busbar 21 has a crimping portion 21A that crimps the first electric wire 22. The crimping portion 21A is formed by cutting and raising the vicinity of the side edge of the busbar 21. The busbar 21 and the first electric wire 22 are electrically connected by welding.

[0039] [First Wire] The first electric wire 22 has a core wire 22A and an insulating coating 22B that covers the core wire 22A. One end of the first electric wire 22 is connected to the bus bar 21 by welding. In this embodiment, the core wire 22A of the first electric wire 22 is made of the same type of metal as the bus bar 21. This can improve the strength of the welded portion between the core wire 22A of the first electric wire 22 and the bus bar 21.

[0040] The other end of the first electric wire 22 is crimped to the crimping portion 62 of the terminal 60, thereby being electrically connected to the terminal 60. The terminal 60 is connected to the circuit board 30 by soldering. The first electric wire 22 has a curved shape from the end on the bus bar 21 side to the end on the circuit board 30 (terminal 60) side.

[0041] The first electric wires 22 electrically connect the busbars 21 and the circuit board 30 while being curved. That is, the first electric wires 22 have an excess length relative to the linear distance between the busbars 21 and the circuit board 30. As the first electric wires 22 deform, the busbars 21 can be displaced to some extent in all of the arrangement direction of the busbars 21 (left-right direction), the direction in which the busbars 21 move away from or approach the circuit board 30 (front-rear direction), and the thickness direction of the circuit board 30 (up-down direction). Therefore, even if the temperature changes during use of the vehicle 1 in which the energy storage module 10 is mounted, causing the energy storage elements 11 (and the busbars 21) to expand or contract, or even if an external force is applied to the wiring module 20 and the busbars 21 are deformed, the connection portions between the first electric wires 22 and the busbars 21 and the connection portions between the first electric wires 22 and the circuit board 30 are less likely to be damaged, and the electrical connection between the busbars 21 and the circuit board 30 via the first electric wires 22 is more likely to be maintained.

[0042] Terminal The terminal 60 is formed by processing a conductive metal plate. Examples of metals that constitute the terminal 60 include copper, copper alloy, aluminum, and aluminum alloy. The terminal 60 of this embodiment is made of a copper alloy. As shown in FIG. 8 , the terminal 60 is connected to a first land 36 (an example of a connection land) of the circuit board 30 by soldering. For example, if the metal that constitutes the core wire 22A of the first electric wire 22 has poor wettability with molten solder, it is difficult to directly connect the first electric wire 22 and the circuit board 30 by soldering. In this embodiment, the terminal 60 is provided between the first electric wire 22 and the circuit board 30. Therefore, even if it is difficult to directly solder the first electric wire 22 and the circuit board 30, the first electric wire 22 and the circuit board 30 can be electrically connected to each other.

[0043] A plating layer may be formed on the surface of the terminal 60. Examples of metals that form the plating layer include tin and nickel. The terminal 60 of this embodiment has a plating layer made of tin. Forming such a plating layer can improve the wettability of the terminal 60 with molten solder. This allows the terminal 60 and the first land 36 of the circuit board 30 to be firmly connected by soldering.

[0044] [Crimped part, connection part] As shown in FIG. 7 , the terminal 60 includes a terminal body 61, a crimping portion 62 connected to the terminal body 61, a connecting portion 63 disposed at the end of the terminal body 61 opposite the crimping portion 62, and a press-fit portion 64 extending downward from the terminal body 61. Note that in FIG. 7 , the front-rear direction, left-right direction, and up-down direction are defined based on the orientation of the terminal 60 disposed on the left side of FIG. 3 . The terminal body 61 is elongated in the left-right direction and flattened in the front-rear direction. As shown in FIG. 4 , the crimping portion 62 includes a wire barrel 62A crimped to the core wire 22A of the first electric wire 22 and an insulation barrel 62B crimped to the insulating coating 22B of the first electric wire 22. As shown in FIG. 8 , the connecting portion 63 is connected to the first land 36 of the circuit board 30 by solder S2.

[0045] [Press-fit part] 7, the press-fit portion 64 is disposed between the connecting portion 63 and the crimping portion 62. The press-fit portion 64 extends downward from the terminal body 61 and is then bent upward. The press-fit portion 64 is configured to be elastically deformable in the front-rear direction (an example of a direction parallel to the surface of the circuit board 30).

[0046] [Base, opposing plate, bending part] The press-fit portion 64 of this embodiment includes a base portion 64A extending downward from the terminal body 61, an opposing plate portion 64B facing the base portion 64A in the front-rear direction, and a bent portion 64C connecting the base portion 64A and the opposing plate portion 64B. The press-fit portion 64 is shaped like a leaf spring. The opposing plate portion 64B is inclined so that the opposing plate portion 64B is positioned further away from the base portion 64A in the front-rear direction as it extends upward. As shown in FIGS. 10 and 11 , the press-fit portion 64 is press-fitted downward (an example of a press-fitting direction) into the press-fit hole 32 of the circuit board 30.

[0047] [Pressing part] As shown in FIG. 7, the terminal 60 includes an extending portion 65 extending upward from the upper end of the opposing plate portion 64B of the press-fit portion 64, and a pressing portion 66 extending forward from the upper end of the extending portion 65. The pressing portion 66 is disposed above the press-fit portion 64 (opposite the press-fit direction). The pressing portion 66 has a surface that intersects with an axis extending in the press-fit direction (downward) of the press-fit portion 64. The terminal 60 includes a pressure-receiving portion 67 recessed downward from the upper surface of the terminal body 61. The pressing portion 66 is disposed inside the pressure-receiving portion 67. Pressing the pressing portion 66 in the press-fit direction makes it easier to press the press-fit portion 64 into the press-fit hole 32 (see FIG. 11).

[0048] [Positioning protrusion] As shown in FIG. 7, the terminal 60 includes a positioning protrusion 68 (an example of an abutment portion) on the crimping portion 62 side of the terminal body 61. The positioning protrusion 68 extends downward from the terminal body 61 and further extends closer to the press-fit portion 64. The positioning protrusion 68 faces the press-fit portion 64 in the left-right direction. After the press-fit portion 64 is press-fitted into the press-fit hole 32, the positioning protrusion 68 is abutted against the end surface of the circuit board 30, thereby positioning the terminal 60 with respect to the circuit board 30 (see FIG. 9). More specifically, the connection portion 63 and the first land 36 can be positioned.

[0049] As shown in Fig. 4, the second electric wire 23 has a core wire 23A and an insulating coating 23B that covers the core wire 23A. The core wire 23A exposed at one end of the second electric wire 23 is connected to the second land 37 by soldering. The insulating coating 23B at one end of the second electric wire 23 is inserted into and fixed in the electric wire insertion portion 53A. Although not shown, the other end of the second electric wire 23 is connected to an external ECU (Electronic Control Unit) or the like via a connector. The ECU is equipped with a microcomputer, elements, etc., and has a well-known configuration that has functions for detecting the voltage, current, temperature, etc. of each storage element 11 and controlling the charging and discharging of each storage element 11.

[0050] [Circuit board] The circuit board 30 of this embodiment is a rigid board that is not flexible. As shown in FIG. 5, the circuit board 30 has a rectangular shape that is long in the left-right direction in a plan view. The circuit board 30 has an insertion hole 31 and a press-fit hole 32 that penetrate the circuit board 30 in the up-down direction. One insertion hole 31 is provided at the left end and one at the right end of the circuit board 30. One insertion hole 31 is a first insertion hole 31A that is substantially circular in a plan view. The other insertion hole 31 is a second insertion hole 31B that is elongated in the left-right direction in a plan view. One press-fit hole 32 is provided at the left end and one at the right end of the circuit board 30. The press-fit hole 32 is disposed adjacent to the first land 36 in the left-right direction.

[0051] 3, the protrusion 52A of the protector 50 is inserted into the insertion hole 31, thereby restricting movement of the circuit board 30 in the left-right and front-rear directions relative to the protector 50. The second insertion hole 31B is elongated, and therefore has an internal shape that is larger in the left-right direction than the cylindrical protrusion 52A. This makes it possible to accommodate manufacturing tolerances in the left-right direction of the insertion hole 31 and the protrusion 52A.

[0052] [Press-fit hole] As shown in FIG. 9, the press-fit portion 64 of the terminal 60 is press-fit into the press-fit hole 32. The left-right diameter L1 of the press-fit hole 32 is set to be larger than the left-right dimension L2 of the press-fit portion 64. As shown in FIG. 11, because the opposing plate portion 64B is inclined with respect to the base portion 64A, the front-rear dimension of the press-fit portion 64 increases toward the upper side of the press-fit portion 64. The front-rear dimension L3 of the lower part of the press-fit portion 64 in its natural state is smaller than the front-rear diameter L4 of the press-fit hole 32. This makes it easier to insert the press-fit portion 64 into the press-fit hole 32.

[0053] A dimension L5 in the front-rear direction of the press-fit portion 64 near its upper end in its natural state is larger than a diameter L4 of the press-fit hole 32 in the front-rear direction. Therefore, when the press-fit portion 64 is press-fitted into the press-fit hole 32 until the lower end of the connection portion 63 contacts the surface of the circuit board 30 (see FIG. 9), the press-fit portion 64 contacts the inner wall of the press-fit hole 32 and is elastically deformed (see FIG. 10). This prevents the press-fit portion 64 from slipping out of the press-fit hole 32, and fixes the terminal 60 to the circuit board 30. Fixing the terminal 60 to the circuit board 30 makes it easier to solder the terminal 60 to the circuit board 30.

[0054] Furthermore, as shown in FIG. 9, since the press-fit portion 64 is disposed between the crimping portion 62 and the connection portion 63, even if stress is applied to the first electric wire 22, this stress is received by the press-fit portion 64 and the inner wall of the press-fit hole 32, thereby preventing stress from being applied to the connection portion between the connection portion 63 and the circuit board 30.

[0055] As shown in Fig. 5, the press-fit hole 32 is elongated, being short in the front-rear direction and long in the left-right direction. That is, the press-fit hole 32 is short in the direction in which the press-fit portion 64 elastically deforms, and long in the direction perpendicular to the direction in which the press-fit portion 64 elastically deforms (see Fig. 8). This allows for a larger area of ​​contact between the press-fit portion 64 and the inner wall of the press-fit hole 32, making it easier to hold the terminal 60 on the circuit board 30.

[0056] [Conductive path] As shown in FIG. 6, the circuit board 30 includes an insulating plate 33 and a conductive path 34 arranged on one surface (top surface) of the insulating plate 33. The insulating plate 33 is formed, for example, by impregnating glass fiber cloth with epoxy resin and then curing the resin. The conductive path 34 is made of a metal such as copper or a copper alloy and is conductive. The conductive path 34 is covered with an insulating layer 35 except for a portion to be soldered to other components. The insulating layer 35 is made of a synthetic resin such as polyimide. As shown in FIG. 5, the conductive path 34 includes a first land 36 arranged at one end of the conductive path 34, a second land 37 arranged at the other end of the conductive path 34, and a fuse portion 38 provided between the first land 36 and the second land 37.

[0057] [Rand 1] The first lands 36 are arranged one on each of the right and left sides of the circuit board 30. Two second lands 37 are arranged near the center of the left and right sides of the circuit board 30. As shown in FIG. 3 , the first lands 36 are soldered to the connection portions 63 of the terminals 60. The first lands 36 are electrically connected to the bus bar 21 via the terminals 60 and the first electric wires 22. The second lands 37 are connected to the core wires 23A of the second electric wires 23 by soldering.

[0058] In this embodiment, the first land 36 does not have a press-fit hole 32 formed therein. In other words, the first land 36 is not a so-called through-hole type soldering portion. Unlike this embodiment, if the first land 36 has a press-fit hole 32, soldering by laser irradiation may cause the inner wall of the press-fit hole 32 to be overheated by the laser light, which may damage the circuit board 30. In this embodiment, the first land 36 does not have a press-fit hole 32, making it easier to perform soldering by laser irradiation.

[0059] 5, a fuse portion 38 is provided in the conductive path 34 in a portion midway between the first land 36 and the second land 37. As shown in Fig. 6, the fuse portion 38 of this embodiment has a chip fuse 39, and the chip fuse 39 and the conductive path 34 are connected by solder S1. In detail, one of a pair of electrodes 40 of the chip fuse 39 is connected to the conductive path 34A on the first land 36 side, and the other is connected to the conductive path 34B on the second land 37 side.

[0060] By providing the fuse section 38, even if a malfunction occurs in the external circuit to which the storage module 10 is connected, causing the conductive paths 34 to short-circuit and generate an overcurrent, the chip fuse 39 will melt, thereby limiting the flow of overcurrent from the storage element 11 to the conductive path 34.

[0061] 6, in this embodiment, the connection portion between the chip fuse 39 and the conductive path 34 is covered with a sealing portion 41. Here, the connection portion between the chip fuse 39 and the conductive path 34 includes at least the entire chip fuse 39, the solder S1, and the end of the conductive path 34 connected to the electrode 40 of the chip fuse 39 that is not covered with the insulating layer 35. The sealing portion 41 is made of a curable insulating resin. Because the sealing portion 41 covers the connection portion between the chip fuse 39 and the conductive path 34, it is possible to prevent a short circuit in the conductive path 34 even if water droplets or the like form on the circuit board 30 due to condensation.

[0062] [Manufacturing method of wiring module] The configuration of the wiring module 20 has been described above. An example of a method for manufacturing the wiring module 20 will now be described. First, the crimping portion 62 of the terminal 60 is crimped to the first electric wire 22. The end of the first electric wire 22 opposite to the terminal 60 is crimped and fixed to the crimping portion 21A of the bus bar 21, and the core wire 22A of the first electric wire 22 and the bus bar 21 are welded together.

[0063] The circuit board 30 is manufactured using printed wiring technology. The chip fuse 39 is soldered to the circuit board 30. A sealing portion 41 is formed to seal the chip fuse 39. Liquid insulating resin before hardening is dropped onto the connection portion between the chip fuse 39 and the conductive path 34 on the circuit board 30 using a dispenser or the like, and is applied in a dome shape. The applied insulating resin is hardened using a known method. Any method can be appropriately selected to harden the insulating resin, such as cooling, mixing a hardener, or irradiating with light.

[0064] While pressing the pressing portion 66 of the terminal 60 from above, the press-fit portion 64 of the terminal 60 is press-fit into the press-fit hole 32 of the circuit board 30. By arranging the press-fit portion 64 in the press-fit hole 32, the terminal 60 is fixed to the circuit board 30. By abutting the positioning protrusion 68 against the end face of the circuit board 30, the terminal 60 is positioned relative to the circuit board 30. The connection portion 63 of the terminal 60 and the first land 36 of the circuit board 30 are connected by soldering.

[0065] The integrated bus bar 21, circuit board 30, and first electric wire 22 are assembled to protector 50. Bus bar 21 is accommodated in bus bar accommodating portion 51 of protector 50. Bus bar 21 is held in bus bar accommodating portion 51 by locking portion 51B. Circuit board 30 is placed in board holding portion 52 of protector 50. Protrusion 52A is inserted into insertion hole 31.

[0066] The second electric wire 23 is routed in the electric wire routing portion 53, and the end of the second electric wire 23 with the core wire 23A exposed is inserted into the electric wire insertion portion 53A. The core wire 23A of the second electric wire 23 is connected to the second land 37 by soldering. This completes the manufacture of the wiring module 20.

[0067] The above is just one example of a method for manufacturing the wiring module 20, and the order of the steps may be changed. For example, the second electric wire 23 may be soldered in the step of soldering the chip fuse 39, etc. to the circuit board 30. Furthermore, the bus bar 21 may be welded to the electrode terminals 12A and 12B, and then the bus bar 21 and the first electric wire 22 may be welded to each other.

[0068] [Effects of the First Embodiment] According to the first embodiment, the following actions and effects are achieved. The wiring module 20 of embodiment 1 is a wiring module 20 attached to a plurality of energy storage elements 11, and comprises an electric wire (first electric wire 22), a terminal 60 connected to the electric wire, and a circuit board 30, the terminal 60 comprising a connection portion 63 connected to the circuit board 30 and a press-fit portion 64 different from the connection portion 63, the circuit board 30 having a connection land (first land 36) to which the connection portion 63 is soldered, and a press-fit hole 32 arranged at a position different from the connection land and into which the press-fit portion 64 is press-fit.

[0069] With this configuration, the press-fit portion 64 is press-fitted into the press-fit hole 32, thereby holding the terminal 60 on the circuit board 30. This makes it easy to solder the connection portion 63 to the connection land.

[0070] In the first embodiment, the press-fit portion 64 is elastically deformable in a direction parallel to the surface of the circuit board 30 (front-rear direction).

[0071] With this configuration, the press-fit portion 64 is elastically deformable in a direction parallel to the surface of the circuit board 30, so that the press-fit force when the press-fit portion 64 is press-fitted can be reduced.

[0072] In the first embodiment, the press-fit portion 64 includes a base portion 64A, an opposing plate portion 64B disposed opposite the base portion 64A, and a bent portion 64C connecting the base portion 64A and the opposing plate portion 64B.

[0073] With this configuration, the press-fit portion 64 that is elastically deformable in a direction parallel to the surface of the circuit board 30 can be provided with a simple configuration.

[0074] In embodiment 1, the terminal 60 has a pressing portion 66 having a surface that intersects with the pressing direction (downward) in which the press-fit portion 64 is pressed into the press-fit hole 32, and the pressing portion 66 is arranged on the opposite side of the press-fit direction from the press-fit portion 64.

[0075] With this configuration, the press-fit portion 64 can be easily press-fitted into the press-fit hole 32 by pressing the pressing portion 66 in the press-fitting direction.

[0076] In the first embodiment, the terminal 60 has a contact portion (positioning protrusion 68) that contacts the end surface of the circuit board 30.

[0077] According to this configuration, the contact portion contacts the end surface of the circuit board 30 , thereby enabling the terminal 60 to be positioned relative to the circuit board 30 .

[0078] In the first embodiment, the terminal 60 includes a crimping portion 62 that is crimped onto an electric wire.

[0079] With this configuration, the terminal 60 and the electric wire can be connected by crimping the crimping portion 62 onto the electric wire.

[0080] In the first embodiment, the press-fit portion 64 is disposed between the connection portion 63 and the crimping portion 62 .

[0081] With this configuration, the press-in portion 64 is arranged between the connection portion 63 and the crimping portion 62, so even if a reaction force is applied to the electric wire, stress can be prevented from being applied to the connection portion between the connection portion 63 and the circuit board 30.

[0082] The wiring module 20 of the first embodiment further includes bus bars 21 connected to the electrode terminals 12A, 12B of the plurality of energy storage elements 11, and the bus bars 21 are connected to electric wires.

[0083] With this configuration, bus bar 21 and circuit board 30 can be electrically connected.

[0084] In the first embodiment, the circuit board 30 includes conductive paths 34 including connection lands, and the conductive paths 34 are formed on only one side of the circuit board 30.

[0085] According to this configuration, the conductive paths 34 are provided on only one side of the circuit board 30, so the manufacturing costs of the wiring module 20 can be reduced compared to when the conductive paths 34 are provided on both sides of the circuit board 30.

[0086] The wiring module 20 of the first embodiment is a wiring module 20 for a vehicle that is electrically attached to a plurality of energy storage devices 11 mounted on a vehicle 1.

[0087] <Embodiment 2> A second embodiment of the present disclosure will be described with reference to Figures 12 and 13. The configuration of the second embodiment is the same as that of the first embodiment, except for the terminal 160. Hereinafter, the same members as those in the first embodiment will be assigned the same reference numerals as those in the first embodiment, and a description of the same configurations, functions, and effects as those in the first embodiment will be omitted.

[0088] As shown in FIG. 12, the terminal 160 according to the second embodiment includes a press-fit portion 164. The press-fit portion 164 includes a base 164A extending downward from the terminal body 61, and a protruding portion 164B. The press-fit portion 164 is provided with two protruding portions 164B arranged side by side in the left-right direction. As shown in FIG. 13, the protruding portions 164B protrude rearward from the base 164A. The protruding portions 164B are formed by hammering out the base 164A. The maximum dimension L6 in the front-rear direction of the press-fit portion 164 is set to be equal to or slightly larger than the diameter L4 (see FIG. 11) of the press-fit hole 32 in the front-rear direction. The press-fit portion 164 of this embodiment does not need to be elastically deformable in the front-rear direction.

[0089] [Effects of Embodiment 2] According to the second embodiment, the following actions and effects are achieved. In the second embodiment, the press-fit portion 164 includes a base portion 164A and a protruding portion 164B that protrudes from the base portion 164A.

[0090] With this configuration, the press-fit portion 164 can be easily configured.

[0091] <Other embodiments> (1) In the first embodiment, one circuit board 30 has two first lands 36, but this is not limited to this, and one circuit board may have one or three or more connection lands. (2) In the first embodiment, the wiring module 20 includes the protector 50, but this is not limitative, and the wiring module does not necessarily need to include a protector. [Explanation of symbols]

[0092] 1: Vehicle 2: Energy storage pack 3: PCU 4: Wire harness 10: Energy storage module 11: Energy storage element 12A,12B: Electrode terminal 20: Wiring module 21: Busbar 21A: Crimping part 22: First Wire 22A: Core wire 22B: Insulation coating 23: Second wire 23A: Core wire 23B: Insulation coating 30: Circuit Board 31: Insertion hole 31A: First insertion hole 31B: Second insertion hole 32: Press-fit hole 33: Insulating board 34: Conductive path 34A: Conductive path on the first land side 34B: Conductive path on the second land side 35: Insulating layer 36: First Land 37: Second Land 38: Fuse section 39: Chip fuse 40: Electrode 41: Sealing part 50: Protector 51: Busbar housing 51A: Connection hole 51B: Locking part 51C: Recess 52: Board holder 52A: Protrusion 53: Wire routing section 53A: Wire insertion part 60,160: Terminal 61: Terminal body 62: Crimping part 62A: Wire barrel 62B: Insulated barrel 63: Connection 64,164: Press-fit section 64A,164A: Base 64B: Opposing plate part 64C: Bending section 65: Extension part 66: Pressing part 67: Pressure receiving part 68: Positioning protrusion 164B: Protrusion L1: Diameter of the press-fit hole in the left-right direction L2: Left-right dimension of the press-fit portion of the first embodiment L3: Dimension in the front-to-rear direction of the lower part of the press-fitting portion in the first embodiment in its natural state L4: Diameter of the press-fit hole in the front-to-rear direction L5: Dimension in the front-rear direction near the upper end of the press-fit portion of the first embodiment in its natural state L6: Maximum dimension in the front-to-rear direction of the press-fit portion of the second embodiment S1, S2: Solder

Claims

1. A wiring module attached to a plurality of energy storage elements, Electric wires and a terminal connected to the electric wire; a circuit board; the terminal includes a connection portion connected to the circuit board and a press-fit portion different from the connection portion, The circuit board has a connection land to which the connection portion is soldered, and a press-fit hole disposed at a position different from the connection land and into which the press-fit portion is press-fitted.

2. The wiring module according to claim 1 , wherein the press-fit portion is elastically deformable in a direction parallel to a surface of the circuit board.

3. The wiring module according to claim 2 , wherein the press-fit portion comprises a base portion, an opposing plate portion disposed opposite the base portion, and a bent portion connecting the base portion and the opposing plate portion.

4. The wiring module according to claim 1 , wherein the press-fit portion comprises a base portion and a protrusion portion protruding from the base portion.

5. the terminal includes a pressing portion having a surface intersecting a press-fitting direction in which the press-fitting portion is press-fitted into the press-fitting hole, The wiring module according to claim 1 , wherein the pressing portion is disposed on an opposite side of the press-fitting portion in a press-fitting direction.

6. The wiring module according to claim 1 , wherein the terminals each include a contact portion that contacts an end surface of the circuit board.

7. The wiring module according to claim 1 , wherein the terminal includes a crimping portion that is crimped to the electric wire.

8. The wiring module according to claim 7 , wherein the press-fit portion is disposed between the connection portion and the crimping portion.

9. further comprising a bus bar connected to the electrode terminals of the plurality of energy storage elements; The wiring module according to claim 1 , wherein the bus bar is connected to the electric wire.

10. the circuit board includes a conductive path including the connection land; The wiring module according to claim 1 , wherein the conductive path is formed on only one surface of the circuit board.

11. The wiring module according to claim 1 , wherein the wiring module is for a vehicle and is electrically attached to the plurality of power storage devices mounted on the vehicle.

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