wiring module

Abstract

A wiring module (20) is mounted to a plurality of power storage elements (11), the wiring module (20) includes bus bars (30) connected to electrode terminals (12) of the plurality of power storage elements (11), electric wires (40), a circuit board (50) connecting the bus bars (30) and one end (43) of the electric wires (40), and a conductive path (56) provided on the circuit board (50), the conductive path (56) includes bus bar pads (58) connected to the bus bars (30), electric wire pads (59) connected to the electric wires (40), and a fuse portion (60) provided between the bus bar pads (58) and the electric wire pads (59).

Description

TECHNICAL FIELD

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

[0002] A high-voltage battery pack used for an electric motor vehicle, a hybrid motor vehicle, or the like generally stacks a plurality of batteries and electrically connects them in series or in parallel by a wiring module. As such a wiring module, a battery connection module described in Japanese Patent Application Publication No. 2019-23996 (Patent Literature 1) is known. The battery connection module described in Patent Literature 1 is configured with a busbar and a flexible circuit board connected to the busbar.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2019-23996 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] In the above-described structure, the flexible circuit board has a main body extending along the stacking direction of the batteries, a hole called a hollow band provided at the center portion of the main body, and an L-shaped flexible arm protruding from the main body. The flexible circuit board is generally formed as a single piece by punching a square-shaped board called a standard size, but the number of finished products per sheet of the flexible circuit board having the hole and the protrusion described above is small, and the manufacturing cost can increase.

[0008] MEANS FOR SOLVING THE PROBLEMS

[0009] The wiring module of the present disclosure is mounted to a plurality of electrical storage elements, has a busbar connected to electrode terminals of the plurality of electrical storage elements, an electric wire, a circuit board connecting one end of the electric wire to the busbar, and a conductive path provided in the circuit board, the conductive path having a busbar pad connected to the busbar, an electric wire pad connected to the electric wire, and a fuse portion provided between the busbar pad and the electric wire pad.

[0010] EFFECTS OF THE INVENTION

[0011] According to the present disclosure, it is possible to provide a wiring module that can reduce manufacturing costs. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a schematic view of a vehicle on which an electrical storage module of Embodiment 1 is mounted.

[0013] Figure 2 is a perspective view of an electrical storage module.

[0014] Figure 3 is a front view of the power storage module.

[0015] Figure 4 is a perspective view of the power storage element.

[0016] Figure 5 is an enlarged front view of the power storage module showing the circuit board.

[0017] Figure 6 is an enlarged front view of the power storage module showing the second wire-retaining portion with the insulating covering.

[0018] Figure 7 is Figure 3 an A-A sectional view.

[0019] Figure 8 is Figure 3 a B-B sectional view.

[0020] Figure 9 is Figure 5 a C-C sectional view.

[0021] Figure 10 is Figure 5 a D-D sectional view.

[0022] Figure 11 is Figure 5 an E-E sectional view.

[0023] Figure 12 is Figure 5 an F-F sectional view.

[0024] Figure 13 is Figure 5 a G-G sectional view.

[0025] Figure 14 is a schematic view showing a circuit board punched from a standard size.

[0026] Figure 15 is a schematic view showing a T-shaped circuit board punched from a standard size.

[0027] Figure 16 is an enlarged front view of the power storage module showing the circuit board of Embodiment 2.

[0028] Figure 17 is an enlarged front view of the power storage module showing the circuit board of Embodiment 3.

[0029] Figure 18 is an enlarged front view of the power storage module showing the circuit board of Embodiment 4.

[0030] Figure 19 is Figure 18 an H-H sectional view.

[0031] Figure 20 is a perspective view of the power storage module of Embodiment 5.

[0032] Figure 21 is an enlarged plan view of the power storage module that represents a circuit board. DETAILED DESCRIPTION

[0033] [Explanation of Embodiments of the Present Disclosure]

[0034] First, an embodiment of the present disclosure will be explained.

[0035] (1) A wiring module is mounted to a plurality of power storage elements, the wiring module includes a bus bar connected to electrode terminals of the plurality of power storage elements, an electric wire, a circuit board connecting the bus bar and one end of the electric wire, and a conductive path provided in the circuit board, the conductive path includes a bus bar land connected to the bus bar, an electric wire land connected to the electric wire, and a fuse portion provided between the bus bar land and the electric wire land.

[0036] According to such a structure, the electric wire is provided in addition to the circuit board in the wiring module, and thus, compared to a case where the electric wire is not provided, the amount of use of the circuit board can be reduced, and the shape of the circuit board can be optimized. Therefore, the manufacturing cost of the wiring module can be reduced.

[0037] (2) Preferably, the wiring module includes a protection member that holds the bus bar, the circuit board, and the electric wire, the protection member includes an electric wire clamping portion that clamps the electric wire.

[0038] According to such a structure, the electric wire can be clamped to the protection member.

[0039] (3) Preferably, two electric wire lands are provided for one electric wire land, and are disposed on both sides of the electric wire land.

[0040] According to such a structure, the electric wire and the electric wire land are easily electrically connected.

[0041] (4) Preferably, the circuit board has a clamped portion, and the protection member includes a board clamping portion that clamps the clamped portion.

[0042] According to such a structure, the circuit board can be clamped to the protection member.

[0043] (5) Preferably, the wiring module includes a connector connected to the other end of the electric wire, and the connector is held by the protection member.

[0044] According to such a structure, the electric signal of the plurality of power storage elements can be taken out to the outside through the connector.

[0045] (6) Preferably, the fuse section has a patch fuse, and the connection portion of the conductive path is covered with an insulating resin.

[0046] According to such a structure, even in an environment in which a water droplet or the like caused by condensation is formed on the circuit substrate, the short circuit of the conductive path can be suppressed.

[0047] (7) Preferably, the circuit substrate is a flexible printed substrate, and the fuse section is constituted by a pattern fuse.

[0048] According to such a structure, the fuse section can be constituted in the manufacturing process of the flexible printed substrate.

[0049] (8) Preferably, a plurality of the bus bar land, the electric wire land, and the fuse section are provided on at least one of the circuit substrates.

[0050] According to such a structure, the number of the circuit substrates used in the wiring module can be reduced, and thus the workability of the assembly of the wiring module can be improved.

[0051] (9) The wiring module described above can be a wiring module mounted on the front side and the rear side of the plurality of power storage elements in the front-rear direction, and can include the electric wire routed in the front-rear direction.

[0052] According to such a structure, the wiring module includes the electric wire routed in the front-rear direction, and thus the manufacturing cost of the wiring module can be reduced.

[0053] (10) The wiring module described above is a wiring module for a vehicle used by being mounted on the vehicle.

[0054] [Details of Embodiments of the Present Disclosure]

[0055] Hereinafter, embodiments of the present disclosure will be described. The present disclosure is not limited to these examples, and the scope of the present disclosure is shown by the claims, and is intended to include all modifications within the meaning and range equivalent to the claims.

[0056] <Embodiment 1>

[0057] Regarding Embodiment 1 of the present disclosure, the description will be made with reference to Figures 1-15 The power storage module 10 provided with the wiring module 20 of the present embodiment is, for example Figure 1The illustrated is applied to the vehicle 1 on the package 2 of the electric storage. The electric storage package 2 is mounted on the vehicle 1 such as an electric motor vehicle or a hybrid vehicle, and is used as a driving source of the vehicle 1. In the following description, for a plurality of the same components, only a part of the components is labeled with a symbol and the symbols of the other components are omitted.

[0058] As Figure 1 shown, the electric storage package 2 is disposed near the center of the vehicle 1. The PCU 3 (Power Control Unit) is disposed at the front of the vehicle 1. The electric storage package 2 and the PCU 3 are connected by a wire harness 4. The electric storage package 2 and the wire harness 4 are connected by a connector not shown. The electric storage package 2 has an electric storage module 10, and the electric storage module 10 has a plurality of electric storage elements 11. The electric storage module 10 (and the wiring module 20) can be mounted in any direction, but hereinafter, except for Figure 1 , Figure 14 and Figure 15 , the direction indicated by the arrow line Z is set as the upper direction, the direction indicated by the arrow line X is set as the front direction, and the direction indicated by the arrow line Y is set as the left direction.

[0059] As Figure 2 shown, the electric storage module 10 has a plurality of electric storage elements 11 arranged in the left-right direction and a wiring module 20 mounted on the front side and the rear side of the plurality of electric storage elements 11. As Figure 4 shown, the electric storage element 11 has a shape that is long in the front-rear direction and flat in the left-right direction. An electric storage element (not shown) is housed in the inside of the electric storage element 11. A pair of electrode terminals 12 is arranged on both sides in the front-rear direction of the electric storage element 11, and protrudes in opposite directions from each other. The pair of electrode terminals 12 has a plate shape, and has opposite polarities from each other.

[0060] [Wiring module]

[0061] As Figure 3 shown, the wiring module 20 of the present embodiment has a busbar 30 connected to the electrode terminal 12, an electric wire 40, a circuit board 50 connecting the busbar 30 and one end 43 of the electric wire 40, and a protection member 70 holding the busbar 30, the electric wire 40, and the circuit board 50. As Figure 2 shown, the wiring module 20 is mounted on the front side and the rear side of the plurality of electric storage elements 11. Hereinafter, the structure of the wiring module 20 disposed on the front side of the plurality of electric storage elements 11 will be described in detail, and the repeated description of the structure of the wiring module 20 disposed on the rear side of the plurality of electric storage elements 11 will be omitted.

[0062] [Protection member]

[0063] As Figure 2As shown, the wiring module 20 of the present embodiment is provided with two protection members 70 disposed on the front side and the rear side of the plurality of power storage elements 11. The protection member 70 is composed of an insulating synthetic resin and is in a plate shape. As shown in Figure 3 As shown, an electrode receiving portion 71 is provided in the central portion in the up-down direction of the protection member 70 in parallel in the left-right direction. The electrode receiving portion 71 is formed through in the front-rear direction and is in a rectangular shape elongated in the up-down direction. A groove portion 72 that holds the bus bar 30 is provided on the upper side of the protection member 70. As shown in Figure 9 As shown, a positioning hole 73 that receives the front end of the bus bar side connecting portion 32 of the bus bar 30 is provided on the lower side of the protection member 70.

[0064] As shown in Figure 2 and Figure 3 As shown, a connector holding portion 74 is provided protruding forward at the left-right direction central position on the upper side of the protection member 70. The connector holding portion 74 is a member that holds a connector 75 described later and is provided only in the protection member 70 disposed on the front side of the plurality of power storage elements 11. As shown in Figure 7 As shown, the connector holding portion 74 is provided with a pair of elastic pieces 76 that can be elastically deformed in the up-down direction and a connector clamping portion 76A provided to the elastic pieces 76. As shown in Figure 8 As shown, the connector holding portion 74 also has a connector fitting recess 77 for fitting the connector 75.

[0065] [Wire clamping portion]

[0066] As shown in Figure 3 As shown, a wiring recess 78 extending in the up-down direction is provided on the protection member 70 slightly to the left (right in the drawing) of the left-right direction central position. The wiring recess 78 is recessed to the plurality of power storage elements 11 side (see Figure 2 ) and can wire a plurality of wires 40 in the up-down direction. A wire clamping portion 79 for clamping the wires 40 one by one is provided in parallel in the left-right direction below the wiring recess 78. As shown in Figure 5 Two wire clamping portions 79 are provided for one wire pad 59 of the circuit board 50 described later, and the wire clamping portions 79 are disposed on both sides in the left-right direction of the wire pad 59. One of the wire clamping portions 79 on both sides of the wire pad 59 is a first wire clamping portion 80, and the other is a second wire clamping portion 81. As shown in Figure 12 As shown, the first wire clamping portion 80 has a pair of clamping claws 80A disposed in opposition in the up-down direction. As shown in Figure 13 As shown, the second wire clamping portion 81 has a through-hole 81A formed through in the left-right direction (vertical direction of the drawing).

[0067] As shown in Figure 3As shown, a wiring-use clamping portion 82 for wiring of the electric wire 40 is provided in parallel with the first electric wire clamping portion 80 below the electric wire clamping portion 79 in the left-right direction. The wiring-use clamping portion 82 has the same shape as the first electric wire clamping portion 80. As shown, Figure 5 As shown, a substrate clamping portion 83 protruding forward is provided above the intermediate position between the first electric wire clamping portion 80 and the second electric wire clamping portion 81. As shown, Figure 11 As shown, the substrate clamping portion 83 is formed in a protrusion shape, and the outer diameter of an umbrella portion 83A at the front end is larger than that of a shaft portion 83B at the base end side.

[0068] [Busbar]

[0069] The busbar 30 is formed in a plate shape by processing a metal plate having conductivity. As shown, Figure 3 As shown, the busbar 30 is held in the groove portion 72 provided on the upper side of the protection member 70 in a manner that the plate thickness direction becomes the left-right direction. The central portion of the busbar 30 becomes a busbar main portion 31 that connects the electrode terminal 12. A busbar-side connecting portion 32 is provided at the lower portion of the busbar 30. As shown, Figure 9 As shown, the busbar-side connecting portion 32 is inserted into the connecting hole 53 of the circuit substrate 50 and is soldered to the busbar land 58 (details will be described later). The front end of the busbar-side connecting portion 32 inserted into the connecting hole 53 is received by the positioning hole 73, and the busbar 30 is positioned with respect to the protection member 70.

[0070] As shown, Figure 2 As shown, when the wiring module 20 is mounted to the front side and the rear side of the plurality of power storage elements 11, the electrode terminal 12 is inserted into the electrode receiving portion 71 of the protection member 70, is appropriately bent in a manner that the busbar main portion 31 is brought into abutment, and is connected to the busbar main portion 31 by laser welding.

[0071] [Circuit substrate, clamping hole]

[0072] As shown, Figure 5 As shown, the circuit substrate 50 has a main portion 51 in a square shape and a convex portion 52 provided convexly downward from the main portion 51. The connecting hole 53 for insertion of the busbar-side connecting portion 32 of the busbar 30 and the clamping hole 54 for insertion of the substrate clamping portion 83 of the protection member 70 are formed in the main portion 51. Here, the inner wall of the clamping hole 54 is an example of a clamped portion. That is, the inner wall of the clamping hole 54 is clamped with the substrate clamping portion 83, and the circuit substrate 50 is assembled to the protection member 70. The connecting hole 53 is provided at a position close to the outer edge of the main portion 51, and the clamping hole 54 is provided at the central portion of the main portion 51. The circuit substrate 50 of the present embodiment is provided in the same number as the busbar 30.

[0073] [Conductive circuit]

[0074] The circuit substrate 50 of the present embodiment is a flexible printed substrate having flexibility, andFigure 9 As shown, the device includes a base film 55, conductive paths 56 disposed on the surface of the base film 55, and a cover film 57 covering the conductive paths 56. The base film 55 and the cover film 57 are made of a synthetic resin such as polyimide, which has insulating and flexible properties. The conductive paths 56 are made of a metal foil such as copper or a copper alloy. Figure 5 As shown, the conductive path 56 includes a busbar pad 58 connected to the busbar 30, a wire pad 59 connected to the wire 40, and a fuse portion 60 disposed between the busbar pad 58 and the wire pad 59.

[0075] [Busbar pads, wire pads]

[0076] like Figure 5 and Figure 9 As shown, busbar pads 58 are formed around the connection holes 53 and are disposed at one end of the conductive path 56. The busbar pads 58 are electrically connected to the busbar-side connection portion 32 of the busbar 30, which is inserted into the connection holes 53, via solder S1. Figure 5 As shown, a wire pad 59 is formed in the center of the protrusion 52 and disposed at the other end of the conductive path 56. The wire pad 59 is electrically connected to the core wire 41 of the wire 40, which is disposed across the protrusion 52 in the left-right direction, by solder S2.

[0077] [Fuse section, surface mount fuse, insulating resin]

[0078] like Figure 5 As shown, in the conductive path 56, a fuse section 60 is provided in the middle section from the busbar pad 58 to the wire pad 59. Figure 10 As shown, the fuse section 60 of this embodiment has a surface mount fuse 61, which is connected to the conductive path 56 via solder S3. Specifically, one of the pair of electrodes 62 of the surface mount fuse 61 is connected to the conductive path 56A on the busbar pad 58 side, and the other is connected to the conductive path 56B on the wire pad 59 side (see reference). Figure 5 The connection portion between the surface mount fuse 61 and the conductive circuit 56 is covered by insulating resin 63. Here, the connection portion between the surface mount fuse 61 and the conductive circuit 56 includes at least the surface mount fuse 61 as a whole, the solder S3, and the end of the conductive circuit 56 connected to the electrode 62 of the surface mount fuse 61, i.e., the portion not covered by the coverlay film 57.

[0079] By providing the fuse section 60, even if an external circuit connected to the energy storage module 10 malfunctions and the conductive paths 56 short-circuit and generate overcurrent, the flow of overcurrent from the energy storage element 11 to the conductive path 56 can be limited. Furthermore, since the insulating resin 63 covers the connection portion between the patch fuse 61 and the conductive path 56, even if water droplets or the like form on the circuit board 50 due to condensation, short circuits in the conductive path 56 can be suppressed.

[0080] [wire, one end of the wire, other end of the wire]

[0081] As shown in FIG. 1, the wire 40 has a core wire 41 and an insulating covering 42 covering the core wire 41. As shown in FIG. 1, an end portion of the wire 40 disposed on the lower side of the protection member 70 serves as one end 43 of the wire 40. An end portion of the wire 40 on the opposite side of the one end 43 serves as the other end 47 of the wire 40, and is connected to the connector 75. As shown in FIG. 1, the one end 43 of the wire 40 is connected to the wire land 59 of the circuit board 50. On the one end 43 of the wire 40, wire-secured portions 44 secured by the wire-securing portions 79 of the protection member 70 are provided on both sides of the core wire 41 connected to the wire land 59. The wire-secured portions 44 provided on the other end 47 side (i.e., the connector 75 side) of the wire 40 are provided as first wire-secured portions 45, and the other wire-secured portions are provided as second wire-secured portions 46. As shown in FIG. 1, the first wire-secured portions 45 are secured by the securing claws 80A of the first wire-securing portions 80. The first wire-secured portions 45 have the insulating covering 42, and thus the core wire 41 of the first wire-secured portions 45 can be prevented from being damaged by the securing claws 80A. Thus, the electrical connection between the connector 75 and the bus bar land 58 is not impaired. Figure 12 Figure 3 Figure 5 Figure 12

[0082] As shown in FIG. 1, the second wire-secured portions 46 can be composed of only the core wire 41, and are secured by being inserted into the insertion holes 81A of the second wire-securing portions 81. In the case where the core wire 41 is composed of a plurality of wire members, it is preferable that the core wire 41 of the second wire-secured portions 46 be precoated with solder or the like. Thus, the wire members do not spread apart, and thus the second wire-secured portions 46 are easily secured to the second wire-securing portions 81. Also, as shown in FIG. 1, the same effect can be obtained even in the case where the second wire-secured portions 46 have the insulating covering 42. Figure 13 Figure 6

[0083] As shown in FIG. 1, the wire 40 is routed to a predetermined position of the protection member 70 by the routing recesses 78 and the routing securing portions 82. Thus, the connection of the one end 43 of the wire 40 to the circuit board 50 is less likely to be hindered by other wires 40. Figure 3

[0084] As shown in FIG. 1, the wire 40 is routed to a predetermined position of the protection member 70 by the routing recesses 78 and the routing securing portions 82. Thus, the connection of the one end 43 of the wire 40 to the circuit board 50 is less likely to be hindered by other wires 40. Figure 2 Figure 3 ​​​​​​​​As shown, a portion of the wire 40 extending from the connector 75 is routed rearward along the upper surface of the plurality of energy storage elements 11, and similarly connected to the circuit board 50 disposed on the rear side of the plurality of energy storage elements 11. Thus, in this embodiment, by routing the long wire 40 in the front-rear direction, a wiring module 20 mounted in front of and behind the plurality of energy storage elements 11 is constructed. Therefore, compared to, for example, constructing the same wiring module using a circuit board without using wires, the manufacturing cost of the wiring module 20 can be reduced.

[0085] [Connector]

[0086] Connector 75 is made of insulating synthetic resin, such as Figure 2 As shown, it appears as a fast pattern. (As indicated...) Figure 8 As shown, connector 75 is fitted into connector mounting recess 77 and cannot move in the left-right direction. Figure 7 As shown, connector 75 is held in place of protective member 70 by being locked from above by connector locking portion 76A. A female terminal (not shown) is housed inside connector 75. Figure 3 As shown, the wire 40 connected to the female terminal extends from the left side of the connector 75. The opposite-side connector (not shown), having a male terminal, engages from the right side of the connector 75. The opposite-side connector is connected to an external ECU (Electronic Control Unit) or similar device via a wire (not shown). The ECU is a structure that houses a microcomputer, components, etc., and is a known structure capable of detecting the voltage, current, temperature, etc., of each energy storage element 11, and controlling the charging and discharging of each energy storage element 11.

[0087] [Number of finished circuit boards]

[0088] In this embodiment, such as Figure 5 As shown, the circuit board 50 is formed with the minimum dimensions required to form the busbar pads 58, fuse portions 60, and wire pads 59. Furthermore, as... Figure 3 As shown, inexpensive wire 40 is used as the conductor that is wired on the protective member 70 and connects the connector 75 to the circuit board 50. With this structure, the electrical connection of the busbar 30 and the formation of the fuse section 60 are well achieved via the circuit board 50, and the amount of circuit board 50 used in the wiring module 20 can be reduced. Furthermore, in this structure, the circuit board 50 has a compact shape with minimal protrusions, thus... Figure 14 As shown, compared to the standard size SS, more circuit boards 50 can be formed with reduced losses (only a general shape is shown). That is, the number of finished circuit boards 50 per standard size SS can be increased. Therefore, the manufacturing cost of the wiring module 20 can be reduced.

[0089] On the other hand, assuming that the wire 40 used in this embodiment is discarded and the same wiring module is manufactured, such as Figure 15 As shown, a T-shaped circuit board 50T needs to be formed (only a general shape is shown). It should be noted that, for simplicity, only the circuit board arranged on the front side of multiple energy storage components 11 is considered here. When the T-shaped circuit board 50T is formed from standard-size SS, the loss on the standard-size SS increases, and the number of finished T-shaped circuit boards 50T for each standard-size SS is very small. Therefore, the manufacturing cost of the wiring module increases.

[0090] This embodiment has the structure described above. An example of the assembly of the wiring module 20 is shown below.

[0091] First, the circuit board 50, with the fuse section 60 pre-installed, is assembled to the protective member 70. The umbrella-shaped portion 83A of the board locking portion 83 is inserted into the locking hole 54 of the circuit board 50, so that the circuit board 50 is pivotally supported by the shaft portion 83B (see reference). Figure 11 The protrusion 52 is disposed between the wire retaining portions 79, aligning the connecting hole 53 with the positioning hole 73, thereby positioning the circuit board 50 at a predetermined position on the protective member 70 (see reference). Figure 5 The circuit board 50 is made of a flexible printed circuit board, which makes it easy to assemble the circuit board 50 into the protective member 70.

[0092] Assemble the busbar 30 onto the protective member 70. Insert the upper part of the busbar 30 into the slot 72 (refer to...). Figure 3 The busbar connection part 32 is inserted into the connection hole 53 of the circuit board 50 and into the positioning hole 73 of the protective member 70 (see reference). Figure 9 Next, the busbar connection 32 and the busbar pad 58 are welded together.

[0093] Next, the connector 75, to which the wire 40 is connected, is installed into the connector retaining portion 74 of the protective member 70. When the left side of the connector 75 is pressed from front to rear relative to the connector retaining portion 74, the elastic sheet 76 flexes, and the connector 75 is received in the connector mounting recess 77. The connector 75 is then locked from above by the connector locking portion 76A (see reference). Figure 7 and Figure 8 Then, wire 40 is routed to the designated location on protective member 70 (refer to...). Figure 3 Finally, the wire locking part 44 locks the wire 40 in the wire locking part 79, and the core wire 41 is soldered to the busbar pad 58, thereby completing the assembly of the wiring module 20 (see reference). Figure 5 ).

[0094] Note that the procedure of routing the electric wire 40 on the protection member 70 and the procedure of soldering the electric wire 40 to the bus bar land 58 can be performed after the electrode terminal 12 is connected to the bus bar 30 with the protection member 70 installed to the plurality of power storage elements 11. This is because, for example, when the power storage element 11 is very long, the wiring module 20 after complete assembly is sometimes difficult to handle.

[0095] [Effects of Embodiment 1]

[0096] According to Embodiment 1, the following effects are exerted.

[0097] The wiring module 20 of Embodiment 1 is a wiring module 20 installed to a plurality of power storage elements 11, includes a bus bar 30 connected to electrode terminals 12 of the plurality of power storage elements 11, an electric wire 40, a circuit board 50 connecting the bus bar 30 and one end 43 of the electric wire 40, and a conductive path 56 provided on the circuit board 50. The conductive path 56 includes a bus bar land 58 connected to the bus bar 30, an electric wire land 59 connected to the electric wire 40, and a fuse portion 60 provided between the bus bar land 58 and the electric wire land 59.

[0098] According to the above-described structure, the electric wire 40 is provided in addition to the circuit board 50 in the wiring module 20, and thus the amount of use of the circuit board 50 can be reduced and the shape of the circuit board 50 can be optimized as compared with a case where the electric wire 40 is not provided. Therefore, the manufacturing cost of the wiring module 20 can be reduced.

[0099] In Embodiment 1, a protection member 70 that holds the bus bar 30, the circuit board 50, and the electric wire 40 is provided. The protection member 70 includes an electric wire retaining portion 79 that retains the electric wire 40.

[0100] According to the above-described structure, the electric wire 40 can be retained by the protection member 70.

[0101] In Embodiment 1, two electric wire retaining portions 79 are provided for one electric wire land 59, and the electric wire retaining portions 79 are disposed on both sides of the electric wire land 59.

[0102] According to the above-described structure, the electric wire 40 can be easily connected to the electric wire land 59.

[0103] In Embodiment 1, the circuit board 50 has a retaining hole 54, and the protection member 70 includes a board retaining portion 83 that is retained by an inner wall of the retaining hole 54.

[0104] According to the above-described structure, the circuit board 50 can be retained by the protection member 70.

[0105] In Embodiment 1, the other end 47 of the electric wire 40 is connected with a connector 75, and the connector 75 is held by the protection member 70.

[0106] According to the above-described structure, the electric signal of the plurality of power storage elements 11 can be taken out to the outside through the connector 75.

[0107] In Embodiment 1, the fuse portion 60 has a chip fuse 61, and the connection portion of the chip fuse 61 and the conductive path 56 is covered with an insulating resin 63.

[0108] According to the above-described structure, even in an environment in which a water droplet or the like caused by condensation is formed on the circuit substrate 50, the short circuit of the conductive path 56 can be suppressed.

[0109] The wiring module 20 of Embodiment 1 is a wiring module 20 installed on the front side and the rear side of the plurality of power storage elements 11 which are long in the front-rear direction, and has the electric wire 40 routed in the front-rear direction.

[0110] According to the above-described structure, the wiring module 20 has the electric wire 40 routed in the front-rear direction, and thus the manufacturing cost of the wiring module 20 can be reduced.

[0111] <Embodiment 2>

[0112] With regard to Embodiment 2 of the present disclosure, the description will be made with reference to Figure 16 Embodiment 2. The structure of Embodiment 2 is the same as that of Embodiment 1 except for a fuse portion 160. Hereinafter, for the members which are the same as those of Embodiment 1, the symbols used in Embodiment 1 are marked, and the description will be omitted with regard to the structure and the effects which are the same as those of Embodiment 1.

[0113] As Figure 16 indicated in the drawing, the circuit substrate 150 of Embodiment 2 has the fuse portion 160. The fuse portion 160 is constituted by a pattern fuse 161 which is provided by forming the conductive path 56 thin. The circuit substrate 150 is provided as a flexible printed substrate which is thin in film thickness. Thus, the heat generated when the overcurrent flows through the pattern fuse 161 is difficult to escape, and the pattern fuse 161 is fused. Therefore, it is possible to limit the case where the overcurrent flows through the conductive path 56.

[0114] In Embodiment 1, a process of connecting the chip fuse 61 to the end portion of the conductive path 56 is required in order to constitute the fuse portion 60. However, in the present embodiment, the pattern fuse 161 (the fuse portion 160) can be constituted at the time of forming the conductive path 56 in the usual manufacturing process of the flexible substrate, and the circuit substrate 150 can be efficiently manufactured.

[0115] [Effects of Embodiment 2]

[0116] According to Embodiment 2, the following effects are exerted.

[0117] In Embodiment 2, the circuit substrate 150 is a flexible printed substrate, and the fuse portion 160 is constituted by the pattern fuse 161.

[0118] According to the above-described structure, the fuse portion 160 can be constituted in the manufacturing process of the flexible printed substrate.

[0119] [Embodiment 3]

[0120] With regard to Embodiment 3 of the present disclosure, reference is made to Figure 17 . The structure of Embodiment 3 is the same as that of Embodiment 1 except that it includes the circuit substrate 250. Hereinafter, for the same members as those of Embodiment 1, the symbols used in Embodiment 1 are marked, and with regard to the same structure and the same effects as those of Embodiment 1, the description is omitted.

[0121] As shown in Figure 17 , the wiring module 220 of Embodiment 3 is provided with the circuit substrate 250. The circuit substrate 250 has a structure in which the two circuit substrates 50 of Embodiment 1 (refer to Figure 5 ) are connected. That is, the circuit substrate 250 has two each of the connection holes 53, the bus bar pads 58, the wire pads 59, and the fuse portions 60, and is connected to the two bus bars 30 and the two wires 40. Here, although the circuit substrate 250 constituted by connecting the two circuit substrates 50 is specifically described, according to the arrangement, size, manufacturing cost, and the like of each member of the wiring module 220, a circuit substrate constituted by connecting three or more circuit substrates 50 can also be adopted.

[0122] [Effects of Embodiment 3]

[0123] According to Embodiment 3, the following effects are exerted.

[0124] In Embodiment 3, the plurality of bus bar pads 58, the wire pads 59, and the fuse portions 60 are provided on at least one circuit substrate 250.

[0125] According to the above-described structure, the number of the circuit substrates 250 used in the wiring module 220 can be reduced, and thus the workability of the assembly of the wiring module 220 can be improved.

[0126] [Embodiment 4]

[0127] With regard to Embodiment 4 of the present disclosure, reference is made to Figure 18 and Figure 19 . The structure of Embodiment 4 is the same as that of Embodiment 1 except for the circuit substrate 350 and the substrate clamping portion 383. Hereinafter, for the same members as those of Embodiment 1, the symbols used in Embodiment 1 are marked, and with regard to the same structure and the same effects as those of Embodiment 1, the description is omitted.

[0128] In embodiment 4, the circuit board 350 is provided as a rigid printed circuit board. For example... Figure 18 As shown, the circuit board 350 is held in place by the protective member 70 via the board locking part 383. Figure 19 As shown, the substrate locking part 383 is configured with a pair of substrate locking pieces 383A and substrate locking claws 383B that are capable of elastic deformation in the left-right direction. When configured in this way, by pressing the locking hole 54 of the circuit board 350 against the substrate locking part 383, the substrate locking pieces 383A are bent and deformed and inserted into the locking hole 54, and the circuit board 350 can be locked by the substrate locking claws 383B.

[0129] Rigid printed circuit boards (PCBs) can be manufactured at a lower cost compared to flexible PCBs. Furthermore, rigid PCBs are harder than flexible PCBs, have a stable shape, and are therefore easier to handle.

[0130] <Implementation Method 5>

[0131] Regarding embodiment 5 of this disclosure, refer to Figure 20 and Figure 21 The following explanation will be provided. Hereinafter, components identical to those in Embodiment 1 will be labeled with the symbols used in Embodiment 1, and descriptions of structures and effects identical to those in Embodiment 1 will be omitted.

[0132] like Figure 20 As shown, the energy storage module 410 of Embodiment 5 includes a plurality of energy storage elements 411 arranged in a row and a wiring module 420 mounted on the upper surface of the plurality of energy storage elements 411. Each energy storage element 411 is formed into a flat cuboid shape that internally houses an energy storage element (not shown). A pair of electrode terminals (not shown) are provided at the right and left ends of the upper surface of each energy storage element 411. The wiring module 420 includes a plate-shaped busbar 30, wires 40, a circuit board 450, and a protective member 470.

[0133] like Figure 20 As shown, a wiring module 420 is provided with a protective member 470. Similar to Embodiment 1, the protective member 470 includes a connector retaining portion 74 for retaining the connector 75, a wiring recess 78, a wire locking portion 79, a substrate locking portion 83, etc. The protective member 470 has a busbar receiving portion 471 for receiving the busbar 30. The positioning of the busbar 30 is performed in the busbar receiving portion 471, therefore the protective member 470 does not have the positioning hole 73 of Embodiment 1.

[0134] like Figure 20As shown, the busbar 30 is plate-shaped and is housed in the busbar housing section 471 with its thickness along the vertical direction. The busbar 30 is disposed on the upper surface of a plurality of energy storage elements 411 and connects to adjacent electrode terminals along the front-to-back direction. The busbar-side connection section 32 of the busbar 30 protrudes upward from the main body section 31 of the busbar.

[0135] like Figure 21 As shown, the circuit board 450 is similarly provided to the circuit board 150 of Embodiment 2, and includes a fuse portion 460 composed of patterned fuses 461. The busbar side connection portion 32 is inserted into the connection hole 53 of the circuit board 450 from below to above. The busbar pads 58 and the busbar connection portion 32, and the wire pads 59 and the wires 40 are electrically connected by solder (not shown).

[0136] like Figure 20 As shown, in embodiment 5, the wiring module 420 is configured as a structure mounted on one surface of a plurality of energy storage elements 411. However, since the number of energy storage elements 411 constituting the energy storage module 410 is large, the wiring module 420 becomes longer and larger along the stacking direction (front-back direction). Therefore, by using wires 40 and circuit board 450 to construct the wiring module 420, the manufacturing cost of the wiring module 420 can be reduced.

[0137] <Other Implementation Methods>

[0138] (1) In the above embodiments, circuit boards 50, 150, 250 and 450 are flexible printed circuit boards and circuit board 350 is a rigid printed circuit board, but it is not limited to this and various circuit boards can be used.

[0139] (2) In the above embodiment, the structure is configured to have protective members 70 and 470, but it is not limited to this and can be configured to not have protective members.

[0140] (3) In the above embodiment, the wire locking part 79 is configured to have a first wire locking part 80 and a second wire locking part 81, but it is not limited to this. The wire locking part may also be configured to have only a first wire locking part or only a second wire locking part.

[0141] (4) In the above embodiment, the locked portion locked by the substrate locking portion 83, 383 is the inner wall of the locking hole 54, but it is not limited to this. For example, it can also be configured such that the locked portion is the outer edge of the circuit board, and the claw-shaped substrate locking portion locks the outer edge of the circuit board.

[0142] (5) In Embodiments 1, 3, and 4, the connecting portion of the patch fuse 61 to the conductive path 56 is configured to be covered with the insulating resin 63, but is not limited thereto and can be configured to be uncovered with the insulating resin.

[0143] (6) In the above-described embodiments, the structure in which the circuit board 50, 150, 250, 450 is fitted to the board fitting portion 83 and the circuit board 350 is fitted to the board fitting portion 383 is configured, but is not limited thereto and can be configured in a structure in which the circuit board is held to the protection member by thermal fastening or an adhesive or the like.

[0144] (7) In the above-described embodiments, the structure in which the busbar-side connecting portion 32 is inserted into the connecting hole 53 and connected to the busbar pad 58 is configured, but is not limited thereto and can be configured in a structure in which the circuit board does not have the connecting hole.

[0145] Symbol Explanation

[0146] 1: Vehicle

[0147] 2: Accumulator Pack

[0148] 3: PCU

[0149] 4: Wire Harness

[0150] 10, 410: Accumulator Module

[0151] 11, 411: Accumulator Element

[0152] 12: Electrode Terminal

[0153] 20, 220, 420: Wiring Module

[0154] 30: Busbar

[0155] 31: Busbar Main Body Portion

[0156] 32: Busbar-Side Connecting Portion

[0157] 40: Electric Wire

[0158] 41: Core Wire

[0159] 42: Insulating Covering

[0160] 43: One End of Electric Wire

[0161] 44: Electric Wire Fitting Portion

[0162] 45: First Electric Wire Fitting Portion

[0163] 46: Second Electric Wire Fitting Portion

[0164] 47: Other End of Electric Wire

[0165] 50, 150, 250, 350, 450: circuit board

[0166] 50T: T-shaped circuit board

[0167] 51: main body portion

[0168] 52: protruding portion

[0169] 53: connecting hole

[0170] 54: locking hole

[0171] 55: base film

[0172] 56: conductive path

[0173] 57: cover film

[0174] 58: bus bar pad

[0175] 59: electric wire pad

[0176] 60, 160, 460: fuse portion

[0177] 61: chip fuse

[0178] 62: electrode

[0179] 63: insulating resin

[0180] 70, 470: protection member

[0181] 71: electrode receiving portion

[0182] 72: groove portion

[0183] 73: positioning hole

[0184] 74: connector holding portion

[0185] 75: connector

[0186] 76: elastic piece

[0187] 76A: connector locking portion

[0188] 77: connector fitting recess

[0189] 78: wiring recess

[0190] 79: electric wire locking portion

[0191] 80: first electric wire locking portion

[0192] 80A: locking claw

[0193] 81: second electric wire locking portion

[0194] 81A: insertion hole

[0195] 82: wiring locking portion

[0196] 83, 383: substrate locking portion

[0197] 83A: umbrella portion

[0198] 83B: shaft portion

[0199] 161, 461: pattern fuse

[0200] 383A: substrate locking piece

[0201] 383B: substrate locking claw

[0202] 471: female bus accommodating portion

[0203] S1, S2, S3: solder

[0204] SS: standard size

Claims

1. A wiring module installed on a plurality of power storage elements, wherein the wiring module comprises: bus bars connected to electrode terminals of the plurality of power storage elements; electric wires; and a circuit board connecting the bus bars and one end of the electric wires, a conductive circuit is arranged on the circuit board, the conductive circuit comprises bus bar pads connected to the bus bars, wire pads connected to the electric wires, and a fuse portion provided between the bus bar pads and the wire pads, the wiring module comprises a protection member that holds the bus bars, the circuit board, and the electric wires, the protection member comprises wire retaining portions that retain the electric wires, two of the wire retaining portions are provided for one of the wire pads, and the wire retaining portions are arranged on both sides of the wire pad.

2. The wiring module according to claim 1, wherein the circuit board comprises retained portions, and the protection member comprises board retaining portions that are retained by the retained portions.

3. The wiring module according to claim 1 or 2, wherein the wiring module comprises a connector connected to the other end of the electric wires, and the connector is held by the protection member.

4. The wiring module according to claim 1 or 2, wherein the fuse portion comprises a chip fuse, and a connection portion of the chip fuse and the conductive circuit is covered with an insulating resin.

5. The wiring module according to claim 1 or 2, wherein the circuit board is a flexible printed board, and the fuse portion is composed of a pattern fuse.

6. The wiring module according to claim 1 or 2, wherein a plurality of the bus bar pads, the wire pads, and the fuse portions are provided on at least one of the circuit boards.

7. The wiring module according to claim 1 or 2, wherein the wiring module is a wiring module for a vehicle that is mounted on a vehicle.

8. A wiring module installed on a plurality of power storage elements, wherein the wiring module comprises: bus bars connected to electrode terminals of the plurality of power storage elements; electric wires; and a circuit board connecting the bus bars and one end of the electric wires, a conductive circuit is arranged on the circuit board, the conductive circuit comprises bus bar pads connected to the bus bars, wire pads connected to the electric wires, and a fuse portion provided between the bus bar pads and the wire pads, the wiring module is a wiring module installed on a front side and a rear side of the plurality of power storage elements in a front-rear direction, and the wiring module comprises the electric wires routed in the front-rear direction.

9. The wiring module according to claim 8, wherein the wiring module is a wiring module for a vehicle that is mounted on a vehicle. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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