WO2024247347A1 - 配線モジュール - Google Patents

配線モジュール Download PDF

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Publication number
WO2024247347A1
WO2024247347A1 PCT/JP2024/000423 JP2024000423W WO2024247347A1 WO 2024247347 A1 WO2024247347 A1 WO 2024247347A1 JP 2024000423 W JP2024000423 W JP 2024000423W WO 2024247347 A1 WO2024247347 A1 WO 2024247347A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
connection portion
connection
resin
fuse unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2024/000423
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
秀夫 高橋
悠平 山田
治 中山
城昭 林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Wiring Systems Ltd, AutoNetworks Technologies Ltd, Sumitomo Electric Industries Ltd filed Critical Sumitomo Wiring Systems Ltd
Priority to CN202480034111.6A priority Critical patent/CN121336317A/zh
Priority to JP2024520027A priority patent/JP7648007B1/ja
Priority to PCT/JP2024/020163 priority patent/WO2024248161A1/ja
Priority to JP2025524928A priority patent/JPWO2024248161A1/ja
Priority to CN202480033165.0A priority patent/CN121219906A/zh
Publication of WO2024247347A1 publication Critical patent/WO2024247347A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • This disclosure relates to a wiring module.
  • High-voltage battery packs used in electric vehicles, hybrid vehicles, etc. usually have many stacked battery cells that are electrically connected in series or parallel by a wiring module.
  • a conductor module described in JP 2019-32928 A (Patent Document 1 below) is known as such a wiring module.
  • the conductor module described in Patent Document 1 includes a wiring material and multiple bus bars.
  • the wiring material has multiple wirings that electrically connect the bus bars and the battery module monitoring unit, and a fuse provided midway through the wiring.
  • Patent Document 1 cites a flexible printed circuit (FPC) as an example of the wiring material. By using an FPC as the wiring material, fuses can be easily provided on the wiring material by mounting.
  • FPC flexible printed circuit
  • the wiring material In the above-mentioned conductor module, if the battery cells, bus bars, etc. are changed, the wiring material must be designed and prepared separately. This makes it difficult to reduce the manufacturing cost of the wiring material.
  • the wiring module of the present disclosure is a wiring module attached to a plurality of energy storage elements, and includes a bus bar connected to an electrode terminal of the energy storage element, a wiring member, a fuse unit, and a protector that holds the bus bar, the wiring member, and the fuse unit, the fuse unit includes a first terminal electrically connected to the bus bar, a second terminal directly or indirectly electrically connected to the wiring member, a resin part covering a part of the first terminal and a part of the second terminal, and a chip fuse, the resin part maintains the distance between the first terminal and the second terminal, the first terminal includes a first connection part exposed from the resin part, the second terminal includes a second connection part exposed from the resin part, and the chip fuse includes a first electrode mounted on the first connection part and a second electrode mounted on the second connection part.
  • This disclosure makes it possible to provide a wiring module that can reduce manufacturing costs.
  • FIG. 1 is a plan view of the electricity storage module according to the first embodiment, illustrating a state in which a lid body and a protector body are not engaged with each other.
  • FIG. 2 is a plan view of the electricity storage module according to the first embodiment, illustrating a state in which the lid and the protector body are engaged with each other.
  • FIG. 3 is an enlarged view of FIG.
  • FIG. 4 is an enlarged view of FIG.
  • FIG. 5 is a cross-sectional view taken along line AA of FIG.
  • FIG. 6 is a cross-sectional view taken along line BB of FIG.
  • FIG. 7 is an enlarged perspective view of the wiring module in a state in which the lid body and the protector body are not engaged with each other according to the first embodiment.
  • FIG. 1 is a plan view of the electricity storage module according to the first embodiment, illustrating a state in which a lid body and a protector body are not engaged with each other.
  • FIG. 2 is a plan view of the electricity storage module according to the first embodiment
  • FIG. 8 is a plan view of the fuse unit to which electric wires are connected according to the first embodiment.
  • FIG. 9 is a cross-sectional view taken along line CC of FIG.
  • FIG. 10 is a plan view of the first terminal and the second terminal according to the first embodiment.
  • FIG. 11 is a plan view of the intermediate molded body according to the first embodiment.
  • FIG. 12 is a plan view of the fuse unit according to the first embodiment.
  • FIG. 13 is a perspective view of the fuse unit according to the second embodiment, illustrating a state in which the fuse unit is connected to an electric wire.
  • FIG. 14 is a cross-sectional view of a fuse unit according to the second embodiment, and corresponds to FIG. 9 of the first embodiment.
  • FIG. 15 is a perspective view of the fuse unit according to the third embodiment, illustrating a state in which the fuse unit is connected to an electric wire.
  • FIG. 16 is a cross-sectional view of a fuse unit according to the third embodiment, and corresponds to FIG. 9 of the first embodiment.
  • FIG. 17 is a cross-sectional view of a fuse unit according to the fourth embodiment, and corresponds to FIG. 9 of the first embodiment.
  • FIG. 18 is a plan view of the fuse unit according to the fifth embodiment.
  • FIG. 19 is a cross-sectional view taken along line DD of FIG.
  • FIG. 20 is a perspective view of the fuse unit according to the sixth embodiment, illustrating a state in which the fuse unit is connected to an electric wire.
  • FIG. 21 is a plan view of a fuse unit connected to an electric wire according to the sixth embodiment.
  • FIG. 22 is a cross-sectional view taken along line E--E of FIG.
  • FIG. 23 is a cross-sectional view taken along line EE of FIG. 21, showing how the third terminal is inserted into the cavity.
  • 24 is a cross-sectional view taken along line EE of FIG. 21, showing a state in which the third terminal is inserted into the cavity and the retainer is in the provisionally retained position.
  • FIG. 25 is a side view of a fuse unit connected to an electric wire according to the sixth embodiment.
  • FIG. 26 is a cross-sectional view taken along the line FF of FIG. 25, and in FIG. 26, the second terminal, the third terminal, and the electric wires are omitted.
  • FIG. 27 is a side view of the fuse unit excluding the third terminal according to the sixth embodiment, showing a state in which the retainer is in the provisionally-retained position.
  • FIG. 28 is a cross-sectional view taken along line GG of FIG.
  • FIG. 29 is a plan view of a first terminal, a second terminal, and a resin portion according to the sixth embodiment.
  • 30 is a cross-sectional perspective view taken along the line HH in FIG. 29.
  • FIG. FIG. 31 is a cross-sectional view taken along line II of FIG.
  • FIG. 32 is a plan view of a first terminal and a second terminal according to the sixth embodiment.
  • FIG. 33 is a perspective view of a fuse unit according to a modified example of the first embodiment.
  • FIG. FIG. 34 is a perspective view of a wiring module according to another embodiment, showing a state in which a fuse unit is connected to a flexible substrate.
  • a wiring module of the present disclosure is a wiring module attached to a plurality of energy storage elements, and comprises: a bus bar connected to electrode terminals of the energy storage elements, a wiring member, a fuse unit, and a protector that holds the bus bar, the wiring member, and the fuse unit, wherein the fuse unit comprises a first terminal electrically connected to the bus bar, a second terminal directly or indirectly electrically connected to the wiring member, a resin part covering a part of the first terminal and a part of the second terminal, and a chip fuse, wherein the resin part maintains a gap between the first terminal and the second terminal, the first terminal comprises a first connection part exposed from the resin part, the second terminal comprises a second connection part exposed from the resin part, and the chip fuse comprises a first electrode mounted on the first connection part and a second electrode mounted on the second connection part.
  • chip fuses can be easily incorporated into the wiring module through implementation. Furthermore, even if the busbar or wiring member is changed, there may be no need to redesign the fuse unit, which reduces the manufacturing costs of the wiring module.
  • the resin portion has a peripheral wall portion that has a portion that protrudes beyond the first connection portion and the second connection portion and is disposed around the chip fuse.
  • the chip fuse can be protected by the surrounding wall.
  • the peripheral wall portion surrounds the first connection portion and the second connection portion.
  • the peripheral wall portion can prevent foreign matter from coming into contact with the chip fuse, thereby preventing stress from occurring at the connection portion between the first connection portion and the first electrode, and at the connection portion between the second connection portion and the second electrode.
  • the fuse unit further includes a cover member that covers the fuse.
  • the cover member can prevent condensation water and the like from adhering to the chip fuse. This can prevent the first electrode and the second electrode from being short-circuited through condensation water and the like.
  • the fuse unit further includes a third terminal to which the wiring member is connected, the second terminal includes a first terminal connection portion connected to the third terminal, and the third terminal includes a second terminal connection portion connected to the first terminal connection portion by fitting.
  • This configuration makes it easier to connect the wiring member to the second terminal.
  • the fuse unit further includes a retainer that is assembled to the resin portion and holds the third terminal.
  • the third terminal can be held against the resin part, making it easier to determine the position of the third terminal relative to the resin part.
  • the first terminal or the second terminal has a notch recessed from the outer edge, and the notch defines the first connection portion or the second connection portion.
  • the notch defines the first connection portion or the second connection portion, so that the size of the first connection portion or the second connection portion can be appropriately adjusted, and heat dissipation from the first connection portion or the second connection portion can be controlled when mounting the chip fuse.
  • a groove is formed in the resin part, the groove being recessed toward the first connection part and the second connection part, the inner wall constituting the groove is continuous with the first connection part and the second connection part, and a part of the groove is disposed inside the notch.
  • facing in this specification refers to surfaces or components facing each other, and includes not only cases where they are completely facing each other, but also cases where they are partially facing each other.
  • facing in this specification includes both cases where there is a component separate from the two parts between the two parts, and cases where there is nothing between the two parts.
  • first direction D1 and the second direction D2 are mutually perpendicular
  • first direction D1 and the third direction D3 are mutually perpendicular
  • second direction D2 and the third direction D3 are mutually perpendicular.
  • An energy storage module 1 including a wiring module 3 of the present embodiment is mounted on a vehicle as a power source for driving the vehicle, such as an electric vehicle or a hybrid vehicle.
  • a vehicle as a power source for driving the vehicle, such as an electric vehicle or a hybrid vehicle.
  • reference numerals may be assigned to only some of the members, and the reference numerals of the other members may be omitted.
  • the energy storage module 1 comprises a number of energy storage elements 2 arranged in a row, and a wiring module 3 attached to one surface (top surface) of the multiple energy storage elements 2 in the second direction D2.
  • the wiring module 3 is attached to both ends of the multiple energy storage elements 2 in the first direction D1.
  • the energy storage elements 2 are in the form of a flattened rectangular parallelepiped with energy storage elements housed inside.
  • the energy storage elements 2 have two electrode terminals 2A (only a portion of which is shown) on both ends of the top surface in the first direction D1.
  • One of the two electrode terminals 2A is a positive electrode, and the other is a negative electrode.
  • the electrode terminals 2A are electrically connected to a bus bar 60.
  • the wiring module 3 includes a bus bar 60, a fuse unit 10 connected to the bus bar 60, an electric wire 70 (an example of a wiring member) connected to the fuse unit 10, and a protector 80 that holds the bus bar 60, the fuse unit 10, and the electric wire 70.
  • the bus bar 60 is made of a metal plate and has a rectangular shape in a plan view.
  • the bus bar 60 is connected to the electrode terminal 2A by welding, etc.
  • the bus bar 60 is accommodated in a bus bar accommodating portion 81 of a protector 80, which will be described later.
  • the fuse unit 10 includes a first terminal 20 , a second terminal 30 , a resin part 40 , and a chip fuse 50 .
  • the first terminal 20 is made of a conductive metal. As shown in FIG. 10, the first terminal 20 has a plate-shaped portion 21 having a rectangular plate shape and a through hole 22 penetrating the plate-shaped portion 21. The through hole 22 is disposed at a position close to an end in the extension direction of the plate-shaped portion 21.
  • the plate-shaped portion 21 has two recesses 21A at both ends in the width direction of the plate-shaped portion 21 (a direction perpendicular to both the extension direction and the plate thickness direction of the plate-shaped portion 21).
  • the recesses 21A are formed by recessing from the edge in the width direction of the plate-shaped portion 21.
  • the plate-shaped portion 21 includes a busbar connection portion 23 electrically connected to the busbar 60.
  • the busbar connection portion 23 and the busbar 60 are connected to each other by, for example, welding or soldering.
  • the second terminal 30 is made of a conductive metal.
  • the metal constituting the second terminal 30 may be different from the metal constituting the first terminal 20.
  • the second terminal 30 has a plate-shaped portion 31 having a rectangular plate shape and a through hole 32 penetrating the plate-shaped portion 31.
  • the through hole 32 is arranged at a position close to the end in the extension direction of the plate-shaped portion 31.
  • the plate-shaped portion 31 has two recesses 31A at both ends in the width direction of the plate-shaped portion 31 (direction perpendicular to both the extension direction and the plate thickness direction of the plate-shaped portion 31).
  • the recesses 31A are formed by recessing from the edge in the width direction of the plate-shaped portion 31.
  • the plate-shaped portion 31 has an electric wire connection portion 33 electrically connected to the electric wire 70.
  • the electric wire connection portion 33 and the electric wire 70 are connected by, for example, soldering or the like.
  • the resin part 40 is made of an insulating synthetic resin. As shown in Figs. 7 to 9, the resin part 40 is disposed between the first terminal 20 and the second terminal 30, and covers a part of the first terminal 20 and a part of the second terminal 30.
  • the resin part 40 is integrally formed with the first terminal 20 and the second terminal 30 by insert molding, as described later. As shown in Figs. 8 and 9, during insert molding, the molten resin, which is the raw material of the resin part 40, is filled into the through holes 22, 32 and the recesses 21A, 31A, so that the first terminal 20 and the second terminal 30 are held relative to the resin part 40.
  • the resin part 40 positions the first terminal 20 and the second terminal 30 so as not to directly contact each other.
  • the first terminal 20 and the second terminal 30 are disposed apart from each other in the first direction D1.
  • the first terminal 20 is disposed so that the extension direction of the plate-shaped part 21 of the first terminal 20 is the first direction D1.
  • the second terminal 30 is arranged such that the extending direction of the plate-shaped portion 31 of the second terminal 30 is the first direction D1.
  • the resin part 40 is formed to have a mounting surface 41.
  • the mounting surface 41 is located between the first terminal 20 and the second terminal 30.
  • the mounting surface 41 is a surface on which the chip fuse 50 is mounted.
  • the mounting surface 41 is perpendicular to the second direction D2 (defined as the up-down direction in this specification).
  • the second direction D2 coincides with the plate thickness direction of the plate-like parts 21, 31.
  • the first connection portion 24 is exposed from the resin portion 40 next to the mounting surface 41.
  • the first connection portion 24 is disposed at an end of the first terminal 20 closer to the second terminal 30 in the first direction D1.
  • the first connection portion 24 is disposed flush with the mounting surface 41.
  • the first connection portion 24 is parallel to the mounting surface 41 and disposed at the same position as the mounting surface 41 in the second direction D2.
  • the first connection portion 24 is continuous with the mounting surface 41 in the first direction D1.
  • flush means a state in which two parallel surfaces are smoothly connected without any steps, but in this specification, in addition to a state in which they are flush, it is also intended to include a state that is recognized as being substantially flush.
  • a state recognized as being substantially flush means, for example, a state in which a minute step appears between the mounting surface 41 and the first connection portion 24 due to the influence of manufacturing tolerances, thermal expansion, etc., or a state in which the mounting surface 41 and the first connection portion 24 slightly intersect and are not strictly parallel to each other.
  • connection portion 34 The second connection portion 34, which is a part of the outer surface of the plate-like portion 31, is exposed from the mounting surface 41.
  • the second connection portion 34 is exposed from the resin portion 40 next to the mounting surface 41.
  • the second connection portion 34 is disposed at an end of the second terminal 30 closer to the first terminal 20 in the first direction D1.
  • the second connection portion 34 is disposed flush with the mounting surface 41.
  • the resin part 40 includes a peripheral wall part 42 that protrudes from the first connection part 24 and the second connection part 34.
  • the peripheral wall part 42 protrudes, for example, along a direction perpendicular to the first connection part 24 and the second connection part 34.
  • the peripheral wall part 42 extends, for example, from the mounting surface 41 to one side (upward) in the second direction D2.
  • the peripheral wall part 42 is disposed so as to surround the chip fuse 50 in a direction perpendicular to the second direction D2.
  • the peripheral wall part 42 is disposed so as not to contact the chip fuse 50.
  • the height of the peripheral wall part 42 from the mounting surface 41 is greater than the height of the chip fuse 50.
  • the chip fuse 50 includes a first electrode 51 and a second electrode 52.
  • the first electrode 51 and the second electrode 52 are electrically insulated from each other.
  • the chip fuse 50 is placed on the placement surface 41.
  • the first electrode 51 is disposed on the first connection portion 24, and the second electrode 52 is disposed on the second connection portion 34.
  • the first electrode 51 and the first connection portion 24 are connected by soldering.
  • the second electrode 52 and the second connection portion 34 are connected by soldering. That is, the chip fuse 50 is mounted on an intermediate molded body 43 (see FIG. 11) that is composed of the first terminal 20, the second terminal 30, and the resin portion 40. Therefore, the chip fuse 50 can be easily assembled into the fuse unit 10 by the mounting process (see FIG. 12).
  • the fuse unit 10 constitutes a component for mounting the chip fuse 50 without using a flexible printed circuit (FPC).
  • FPC flexible printed circuit
  • the first terminal 20, the second terminal 30, and the resin part 40 form the first connection part 24 and the second connection part 34 on which the chip fuse 50 can be mounted. This makes it easy to reduce the manufacturing cost of the fuse unit 10.
  • Electric wire 70 As shown in Fig. 3, the electric wires 70 connected to the fuse unit 10 are collectively accommodated in an electric wire accommodating section 82 of a protector 80 described later.
  • the electric wires 70 are arranged in the electric wire accommodating section 82 so as to extend in a third direction D3.
  • the electric wires 70 are connected to a connector 71 at an end opposite to the fuse unit 10.
  • the connector 71 is adapted to be connected to an external ECU (Electronic Control Unit) or the like.
  • the ECU is equipped with a microcomputer, elements, etc., and has a well-known configuration having functions for detecting the voltage, current, temperature, etc. of each storage element 2 and controlling the charging and discharging of each storage element 2.
  • the electric wires 70 function as voltage detection lines.
  • the wiring module 3 of this embodiment includes an electric wire 70 instead of an FPC as a voltage detection line. Therefore, the wiring module 3 can be manufactured at a lower cost compared to a wiring module in which an FPC is used as a voltage detection line.
  • the protector 80 is made of insulating synthetic resin. As shown in Figures 3 and 4, the protector 80 includes a protector body 80A and a lid 80B that covers the protector body 80A from above. The lid 80B is integrally formed with the protector body 80A via a hinge portion 80C. The hinge portion 80C is configured to be elastically deformable. As shown in Figure 6, the lid 80B can be assembled by overlapping it on the protector body 80A by elastically deforming the hinge portion 80C.
  • the protector body 80A is tray-shaped. As shown in FIG. 3, the protector body 80A includes a busbar accommodating section 81 that accommodates the busbar 60, an electric wire accommodating section 82 that accommodates the multiple electric wires 70, and an intermediate wiring section 83 that is arranged between the busbar accommodating section 81 and the electric wire accommodating section 82.
  • the busbar accommodating sections 81 are frame-shaped and arranged side by side in the third direction D3.
  • the wire accommodating section 82 is groove-shaped and extends in the third direction D3.
  • the wire accommodating section 82 includes a bottom wall 82A, a first side wall 82B rising upward from one end of the bottom wall 82A in the first direction D1, and a second side wall 82C rising upward from the other end of the bottom wall 82A in the first direction D1.
  • the first side wall 82B is located closer to the intermediate wiring section 83 than the second side wall 82C.
  • a cutout portion 82D is formed in the first side wall 82B.
  • the wire 70 is received from the intermediate wiring section 83 to the wire accommodating section 82 through this cutout portion 82D.
  • the second side wall 82C is connected to the cover body 80B via a hinge portion 80C.
  • the intermediate wiring section 83 has the fuse unit 10 and the electric wire 70 connected to the fuse unit 10 arranged therein. As shown in Figures 5 and 6, the intermediate wiring section 83 has a bottom surface 83A and a protrusion receiving section 83B recessed downward from the bottom surface 83A.
  • the lid body 80B is configured to be able to close the wire housing section 82 and part of the intermediate wiring section 83 of the protector body 80A from above.
  • the lid body 80B has a plate-shaped section 84 and a protruding section 85 protruding from the plate-shaped section 84.
  • a locking structure is provided between the lid body 80B and the protector body 80A, and this locking structure allows the lid body 80B to maintain a state in which it closes the protector body 80A.
  • the protrusion 85 is, for example, block-shaped.
  • the protrusion 85 is arranged to face the protrusion receiving portion 83B in the vertical direction, and the electric wire 70 is arranged between the protrusion 85 and the protrusion receiving portion 83B.
  • the distance between the protrusion 85 and the protrusion receiving portion 83B is approximately the same as the diameter of the electric wire 70.
  • the wiring module 3 of this embodiment is used in a vehicle, it is conceivable that vibrations will be applied to the electric wires 70. Furthermore, the electric wires 70 are connected to the connector 71, and it is expected that tensile stress will be applied to the electric wires 70 when the connector 71 is connected to an external ECU or the like. As described above, in this embodiment, the electric wires 70 are fixed to the protector 80 by the protrusion 85 and the protrusion receiving portion 83B. Therefore, even if vibrations or tensile stresses are applied to the electric wires 70, the vibrations and tensile stresses are unlikely to be transmitted to the connection between the electric wires 70 and the fuse unit 10. Therefore, damage to the connection between the electric wires 70 and the fuse unit 10 can be suppressed.
  • insert molding of the resin part 40 is performed using a part of the first terminal 20 and a part of the second terminal 30 as insert parts (resin part forming process).
  • the first terminal 20 and the second terminal 30 are placed in a mold, and the mold is filled with molten resin, which is the raw material of the resin part 40.
  • the first terminal 20 and the second terminal 30 are arranged so that they do not come into direct contact with each other.
  • the first terminal 20 and the second terminal 30 are appropriately positioned in the mold so that the first connection part 24 and the second connection part 34 adjacent to the mounting surface 41 are exposed from the resin part 40, and the first connection part 24 and the second connection part 34 are flush with the mounting surface 41.
  • the mold is removed, and an intermediate molded body 43 is obtained (see FIG. 11).
  • the chip fuse 50 is placed on the mounting surface 41 of the intermediate molded body 43, and the first electrode 51 is mounted to the first connection portion 24 and the second electrode 52 is mounted to the second connection portion 34 (mounting process, see Figure 12). This completes the manufacturing of the fuse unit 10.
  • the busbar 60 is formed by pressing a metal plate.
  • the protector 80 is provided by injection molding an insulating synthetic resin.
  • Each electric wire 70 is cut to a predetermined length, and the core wire is exposed at the end.
  • the electric wire connection portion 33 of the second terminal 30 of the fuse unit 10 and the core wire of the electric wire 70 are connected by soldering.
  • the bus bar 60 is accommodated in the bus bar accommodating section 81 of the protector 80.
  • a plurality of electric wires 70 are accommodated together in the electric wire accommodating section 82.
  • the fuse unit 10 and a portion of the electric wires 70 are arranged in the intermediate wiring section 83.
  • the bus bar 60 and the bus bar connection section 23 of the first terminal 20 of the fuse unit 10 are connected by welding.
  • the protector body 80A With the wire 70 arranged inside the protrusion receiving portion 83B of the intermediate wiring portion 83, the protector body 80A is closed by the lid 80B. This causes the wire 70 to be clamped between the protrusion receiving portion 83B and the protrusion 85. This completes the manufacturing of the wiring module 3.
  • the wiring module 3 of the first embodiment is a wiring module 3 attached to a plurality of energy storage elements 2, and includes a bus bar 60 connected to electrode terminals 2A of the energy storage elements 2, a wiring member (electric wire 70), a fuse unit 10, and a protector 80 that holds the bus bar 60, the wiring member, and the fuse unit 10.
  • the fuse unit 10 includes a first terminal 20 electrically connected to the bus bar 60, and a second terminal 20 electrically connected directly or indirectly to the wiring member.
  • the first terminal 20 includes a first connection portion 24 exposed from the resin portion 40
  • the second terminal 30 includes a second connection portion 34 exposed from the resin portion 40
  • the chip fuse 50 includes a first electrode 51 mounted on the first connection portion 24 and a second electrode 52 mounted on the second connection portion 34.
  • the chip fuse 50 can be easily included in the wiring module 3 through implementation. Furthermore, even if the bus bar 60 or wiring member is changed, there may be no need to redesign the fuse unit 10, which reduces the manufacturing cost of the wiring module 3.
  • the resin part 40 has a peripheral wall part 42 that has a portion that protrudes beyond the first connection part 24 and the second connection part 34 and is disposed around the chip fuse 50.
  • the chip fuse 50 can be protected by the peripheral wall portion 42.
  • peripheral wall portion 42 surrounds the first connection portion 24 and the second connection portion 34.
  • the peripheral wall portion 42 can prevent foreign matter from coming into contact with the chip fuse 50, thereby preventing stress from occurring in the connection portion between the first connection portion 24 and the first electrode 51, and in the connection portion between the second connection portion 34 and the second electrode 52.
  • a fuse unit 110 according to the second embodiment is configured similarly to the first embodiment except that it further includes a lid portion 144 (an example of a cover member), and therefore descriptions of the same members and effects as those of the first embodiment will be omitted.
  • the lid portion 144 is made of insulating synthetic resin, insulating tape, or the like. As shown in Fig. 14, the lid portion 144 is attached to the upper end surface of the peripheral wall portion 42 and closes the opening 42A formed by the peripheral wall portion 42. The lid portion 144 and the chip fuse 50 are disposed with a space therebetween.
  • the fuse unit 110 of the second embodiment can be manufactured by attaching the lid portion 144 to the fuse unit 10 of the first embodiment.
  • the lid portion 144 can prevent water droplets from entering the opening 42A of the peripheral wall portion 42. Therefore, after the chip fuse 50 melts, it is possible to prevent electrical continuity between the first connection portion 24 and the second connection portion 34 through the water droplets.
  • a fuse unit 210 according to the third embodiment is configured similarly to the first embodiment except that it further includes a sealing portion 245 (an example of a cover member), and therefore descriptions of the same members and effects as those of the first embodiment will be omitted.
  • the sealing portion 245 is made of a curable insulating resin.
  • the sealing portion 245 may be made of a resin different from the synthetic resin constituting the resin portion 40.
  • the sealing portion 245 may be transparent.
  • the sealing portion 245 of the third embodiment is, for example, a potting agent. As shown in FIG. 16, the sealing portion 245 is arranged so as to fill the space in the opening 42A of the peripheral wall portion 42.
  • the sealing portion 245 is in close contact with the outer surface of the chip fuse 50, the first connecting portion 24, the second connecting portion 34, and the mounting surface 41.
  • the sealing portion 245 is formed by filling the opening 42A with liquid insulating resin before hardening after the mounting process and hardening the insulating resin.
  • a bottomed recess is formed on the inside of the peripheral wall portion 42 by the inner circumferential surface of the peripheral wall portion 42, a surface of the resin portion 40 between the first terminal 20 and the second terminal 30 that is exposed to the inside of the peripheral wall portion 42, the surface of the first terminal 20 that is exposed to the inside of the peripheral wall portion 42, and the surface of the second terminal 30 that is exposed to the inside of the peripheral wall portion 42. Therefore, by arranging the molten sealing portion 245 in this recess, the chip fuse 50, the connection portion between the first connection portion 24 and the first electrode 51, and the connection portion between the second connection portion 34 and the second electrode 52 can be easily covered by the sealing portion 245.
  • a through hole 246 may be formed in the resin part 40.
  • This through hole 246 penetrates the mounting surface 41 and the lower surface of the resin part 40.
  • the through hole 246 exposes a part of the outer surface of the chip fuse 50, which is different from the first electrode 51 and the second electrode 52, to the outside. In other words, the entire outer surface of the chip fuse 50 is not covered by the sealing part 245 and the resin part 40.
  • the first electrode 51 and the second electrode 52 are not exposed to the outside through the through hole 246.
  • the through hole 246 may be formed, for example, in the resin part forming process or after the resin part forming process.
  • the sealing portion 245 can prevent water droplets from entering the opening 42A of the peripheral wall portion 42. Therefore, after the chip fuse 50 melts, it is possible to prevent electrical continuity between the first connection portion 24 and the second connection portion 34 through the water droplets.
  • a fourth embodiment of the present disclosure will be described with reference to Fig. 17.
  • a fuse unit 310 according to the fourth embodiment is configured substantially similarly to the third embodiment, except for the configuration of a sealing portion 345 (an example of a cover member), and therefore descriptions of the same members and effects as those of the first and third embodiments will be omitted.
  • the sealing portion 345 in the fourth embodiment is, for example, a moisture-proof coating agent.
  • the sealing portion 345 is in close contact with the outer surface of the chip fuse 50, the first connection portion 24, the second connection portion 34, and the mounting surface 41 within the opening 42A of the peripheral wall portion 42.
  • the sealing portion 345 does not have to fill the entire space within the opening 42A.
  • a fifth embodiment of the present disclosure will be described with reference to Figures 18 and 19.
  • a fuse unit 410 according to the fifth embodiment is configured substantially similarly to the first embodiment, except for the absence of a peripheral wall portion 42 and the configuration of plate-shaped portions 421 and 431, and therefore descriptions of the same members and effects as those of the first embodiment will be omitted.
  • the fuse unit 410 includes a first terminal 420, a second terminal 430, a resin part 440, and a chip fuse 50. As shown in FIG. 19, the resin part 440 does not have a peripheral wall part 42. The upper surface of the resin part 440 serves as the mounting surface 41.
  • the plate-shaped portion 421 of the first terminal 420 includes a first plate portion 421A, a second plate portion 421B, and a third plate portion 421C.
  • the second plate portion 421B and the third plate portion 421C are formed narrower than the first plate portion 421A (see FIG. 18).
  • the first plate portion 421A is a plate-shaped member that is connected to the busbar connection portion 23 in the first direction D1.
  • the second plate portion 421B extends upward from the end of the first plate portion 421A opposite the busbar connection portion 23 in the first direction D1.
  • the third plate portion 421C extends in the first direction D1 from the upper end of the second plate portion 421B.
  • the third plate portion 421C and the first plate portion 421A extend in opposite directions to each other in the first direction D1 relative to the second plate portion 421B.
  • the upper surface of the third plate portion 421C is the first connection portion 24.
  • the plate portion 431 of the second terminal 430 includes a first plate portion 431A, a second plate portion 431B, and a third plate portion 431C.
  • the second plate portion 431B and the third plate portion 431C are formed narrower than the first plate portion 431A (see FIG. 18).
  • the first plate portion 431A is a portion that is connected to the electric wire connection portion 33 in the first direction D1.
  • the second plate portion 431B extends upward from the end of the first plate portion 431A opposite the electric wire connection portion 33 in the first direction D1.
  • the third plate portion 431C extends in the first direction D1 from the upper end of the second plate portion 431B.
  • the third plate portion 431C and the first plate portion 431A extend in opposite directions to each other in the first direction D1 relative to the second plate portion 431B.
  • the upper surface of the third plate portion 431C is the second connection portion 34.
  • the fuse unit 610 according to the sixth embodiment further includes a third terminal 680, and the second terminal 630 and the electric wire 70 are connected via the third terminal 680.
  • the same members and effects as those of the first embodiment may be omitted.
  • the fuse unit 610 includes a first terminal 620, a second terminal 630, a resin part 640, and a chip fuse 50. As shown in Fig. 22, the fuse unit 610 includes a third terminal 680 disposed inside the resin part 640. The third terminal 680 is connected to the electric wire 70.
  • the first terminal 620 has a plate-shaped portion 21, a through hole 22, two recesses 21A, a bus bar connection portion 23, and a first connection portion 24, similar to the first terminal 20 of the first embodiment.
  • the first terminal 620 also has a notch 625 as a configuration different from the first terminal 20 of the first embodiment.
  • the notch 625 is formed as a pair by being recessed from an outer edge portion on one side in the extension direction of the first terminal 620.
  • the first connection portion 24 is defined by the notch 625. In other words, the first connection portion 24 and the notch 625 are adjacent to each other in the width direction of the first terminal 620.
  • the notch 625 appropriately sets the area of the first connection portion 24 in a plan view.
  • the notch 625 is not provided, when the first electrode 51 of the chip fuse 50 and the first connection portion 24 are connected by soldering, the amount of heat transferred to the first terminal 620 may be large. However, in this embodiment, the size of the first connection portion 24 is appropriately adjusted using the notch 625, so that the amount of heat transferred to the first terminal 620 can be appropriately controlled.
  • the second terminal 630 has a plate-shaped portion 31, a through hole 32, two recesses 31A, and a second connection portion 34, similar to the second terminal 30 of the first embodiment.
  • the plate-shaped portion 31 has two recesses 31A at both ends in the width direction of the second terminal 30 (a direction perpendicular to both the extension direction of the second terminal 30 and the plate thickness direction of the plate-shaped portion 31).
  • the recesses 31A are formed by being recessed from the edge of the width direction of the second terminal 30.
  • the second terminal 630 also includes a tab portion 633 (an example of a first terminal connection portion).
  • the tab portion 633 is formed in a continuous manner with the plate-shaped portion 31 in the extension direction of the second terminal 630.
  • the tab portion 633 is rod-shaped and extends from the edge of the plate-shaped portion 31 in the extension direction of the second terminal 630.
  • the second terminal 630 is provided with a notch 635, similar to the first terminal 620.
  • the notch 635 is formed as a pair by being recessed from the outer edge portion opposite the tab portion 633 in the extension direction of the second terminal 630.
  • the second connection portion 34 is defined by the notch 635.
  • the second connection portion 34 and the notch 635 are adjacent to each other in the width direction of the second terminal 630.
  • the notch 635 appropriately sets the area of the second connection portion 34 in a plan view.
  • the third terminal 680 is made of a conductive metal.
  • the metal constituting the third terminal 680 may be different from the metal constituting the first terminal 620 and the metal constituting the second terminal 630.
  • the third terminal 680 includes a connection tube portion 681 (an example of a second terminal connection portion) connected to the second terminal 630, and a barrel portion 682.
  • the barrel portion 682 is formed to be continuous with the connection tube portion 681 in the extension direction of the third terminal 680.
  • the barrel portion 682 includes a core wire crimping portion 682A that is crimped to the core wire of the electric wire 70, and an insulating coating crimping portion 682B that is crimped to the insulating coating of the electric wire 70.
  • connection tube portion 681 includes a tube wall portion 683 having a rectangular tube shape, for example, and an elastic contact piece 684 formed inside the tube wall portion 683.
  • the tube wall portion 683 is open in the first direction D1.
  • the elastic contact piece 684 extends from the inner surface of the tube wall portion 683 and is elastically deformable in a direction perpendicular to the first direction D1.
  • the connection tube portion 681 also has a locking hole 683A formed penetrating the tube wall portion 683. As shown in FIGS.
  • the tab portion 633 of the second terminal 630 is inserted into the tube wall portion 683, and the elastic contact piece 684 comes into contact with the tab portion 633, thereby electrically connecting the third terminal 680 and the second terminal 630. That is, the connection tube portion 681 and the tab portion 633 are electrically connected by fitting. Therefore, the second terminal 630 and the electric wire 70 are electrically connected via the third terminal 680.
  • the second terminal 630 is not directly connected to the electric wire 70, but is indirectly connected to the electric wire 70 via the third terminal 680. Therefore, when electrically connecting the fuse unit 610 and the electric wire 70, for example, it is possible to prevent the connection portion between the chip fuse 50 and the second terminal 630 from being damaged by stress or the like. This makes it easier to ensure the reliability of the electrical connection between the fuse unit 610 and the electric wire 70.
  • the resin part 640 covers a part of the first terminal 620 and a part of the second terminal 630.
  • the resin part 640 is formed integrally with the first terminal 620 and the second terminal 630 by insert molding, as in the first embodiment.
  • the first terminal 620 and the second terminal 630 are fixed to the resin part 640.
  • the resin part 640 has an intermediate part 641 disposed between the first terminal 620 and the second terminal 630 in the first direction D1.
  • the resin part 640 maintains the distance between the first terminal 620 and the second terminal 630.
  • the resin part 640 exposes the first connection part 24, which is a part of the outer surface of the plate part 21, and the second connection part 34, which is a part of the outer surface of the plate part 31.
  • the first connection part 24 and the second connection part 34 are disposed at a predetermined distance in the first direction D1 by the resin part 640.
  • the resin portion 640 exposes the bus bar connection portion 23 to the outside.
  • one end face (upper) of the intermediate portion 641 in the second direction D2 is set as the reference surface 641A.
  • the reference surface 641A is arranged flush with the first connection portion 24 (outer surface of the plate-shaped portion 21) and the second connection portion 34 (outer surface of the plate-shaped portion 31).
  • the reference surface 641A is perpendicular to the second direction D2 (up-down direction).
  • the second direction D2 coincides with the plate thickness direction of the plate-shaped portions 21, 31.
  • the resin portion 640 may have a through hole 246, similar to the third embodiment.
  • the through hole 246 penetrates the middle portion 641 in the second direction D2.
  • the resin part 640 has a peripheral wall part 42, similar to the first embodiment.
  • the peripheral wall part 42 extends from the reference surface 641A to one side (upward) in the second direction D2. That is, the peripheral wall part 42 has a portion that protrudes upward from the first connection part 24 and the second connection part 34.
  • the peripheral wall part 42 is disposed around the chip fuse 50.
  • the peripheral wall part 42 also surrounds the first connection part 24 and the second connection part 34 in a direction perpendicular to the second direction D2.
  • the intermediate portion 641 has a groove 641B recessed from the reference surface 641A to the other side (downward) in the second direction D2.
  • the groove 641B is recessed downward with respect to the first connecting portion 24 and the second connecting portion 34.
  • the groove 641B is composed of a bottom surface BS that is approximately parallel to the reference surface 641A, a first inner surface S1 that connects the bottom surface BS and the first connecting portion 24, a second inner surface S2 that connects the bottom surface BS and the second connecting portion 34, and a third inner surface S3 that connects the bottom surface BS and the reference surface 641A.
  • the groove 641B is adjacent to each of the first connecting portion 24 and the second connecting portion 34 when viewed from a direction (second direction D2) perpendicular to the first connecting portion 24 and the second connecting portion 34.
  • the bottom surface BS faces the chip fuse 50 in the second direction D2.
  • a gap is provided between the bottom surface BS and the chip fuse 50.
  • a portion of the groove 641B is disposed inside the notches 625 and 635.
  • a groove 641B may be provided in the resin part 640, so that a part of the side surface of the first terminal 620 continuing from the outer edge of the first connection part 24 (hereinafter, the first side surface part SP1) may be exposed from the resin part 640.
  • the first connection part 24 and the first inner surface S1 may be connected via the first side surface part SP1.
  • a groove 641B may be provided in the resin part 640, so that a part of the side surface of the second terminal 630 continuing from the outer edge of the second connection part 34 (hereinafter, the second side surface part) may be exposed from the resin part 640.
  • the second connection part 34 and the second inner surface S2 may be connected via the second side surface part.
  • the first connection portion 24 and the inner surface of the groove 641 may be directly connected.
  • the second connection portion 34 and the inner surface of the groove 641 may be directly connected.
  • the molten resin may move to the outer surface (top surface) of the first connection part 24 and the second connection part 34, and burrs may occur on the first connection part 24 and the second connection part 34. In such a case, the burrs may cause a poor electrical connection between the first connection part 24 and the first electrode 51 or between the second connection part 34 and the second electrode 52.
  • the groove 641B is provided in the intermediate part 641, when the resin part 640 is formed, the molten resin is more likely to move into the groove 641B than to the top surface of the first connection part 24 and the second connection part 34. Therefore, it is possible to suppress the occurrence of burrs on the first connection part 24 and the second connection part 34.
  • the resin part 640 has a housing part 643 formed continuously with the intermediate part 641 and the peripheral wall part 42.
  • the housing part 643 extends on the opposite side of the first terminal 620 from the intermediate part 641.
  • the housing part 643 has a cavity 644 in which the third terminal 680 is accommodated.
  • the cavity 644 extends in the first direction D1 and opens to one side in the first direction D1 (the right side in the figure).
  • the tab part 633 of the second terminal 630 and a part of the plate part 31 which is the base end part of the tab part 633 are arranged at the end of the cavity 644 on the other side in the first direction D1 (the left side in the figure).
  • the housing portion 643 includes a bottom wall 643A (see FIG. 22), a pair of side walls 643B, and a ceiling wall 643C.
  • the pair of side walls 643B extend from both ends of the bottom wall 643A in the third direction D3 to one side (upward) in the second direction D2.
  • the ceiling wall 643C faces the bottom wall 643A in the second direction D2.
  • the ceiling wall 643C connects one end (upper end) of the pair of side walls 643B in the second direction D2.
  • the cavity 644 is an internal space defined by the bottom wall 643A, the pair of side walls 643B, and the ceiling wall 643C.
  • a first communication hole 643C1 is provided in a portion of the ceiling wall 643C closer to the middle portion 641.
  • the first communication hole 643C1 penetrates the ceiling wall 643C in the second direction D2 and communicates with the cavity 644.
  • a second communication hole 643A1 is provided in the end of the bottom wall 643A closer to the middle portion 641.
  • the second communication hole 643A1 penetrates the bottom wall 643A in the second direction D2 and communicates with the cavity 644.
  • a mounting recess 645 for mounting a retainer 690 (described later) is formed in approximately two-thirds of the area on the other side (left side in the figure) of the housing portion 643 in the first direction D1.
  • the mounting recess 645 has a first mounting recess 645A recessed from the outer surface of the ceiling wall 643C, and a second mounting recess 645B recessed from the outer surfaces of the pair of side walls 643B.
  • the end of the first mounting recess 645A closer to the middle portion 641 extends to the peripheral wall portion 42.
  • the first mounting recess 645A communicates with the first communication hole 643C1.
  • the housing portion 643 includes a shaft portion 646, a temporary locking portion 647, and a full locking portion 648 that protrude from the inner wall of the second mounting recess 645B in the third direction D3.
  • the shaft portion 646 is generally cylindrical.
  • the shaft portion 646 is disposed on a portion of the inner wall of the second mounting recess 645B closer to the middle portion 641 in the first direction D1.
  • the temporary locking portion 647 and the full locking portion 648 are disposed on an end of the inner wall of the second mounting recess 645B opposite the middle portion 641 in the first direction D1.
  • the temporary locking portion 647 and the full locking portion 648 are disposed close to each other.
  • the temporary locking portion 647 is disposed on one side (the right side in the figure) of the full locking portion 648 in the first direction D1.
  • the provisional locking portion 647 is disposed on one side (above) of the full locking portion 648 in the second direction D2.
  • the fuse unit 610 of this embodiment includes a retainer 690 that is assembled to the resin part 640.
  • the retainer 690 is made of insulating synthetic resin.
  • the retainer 690 is adapted to be assembled to the resin part 640 at a provisional locking position (see Fig. 27) and a full locking position (see Fig. 25).
  • the retainer 690 is substantially gate-shaped when viewed from the first direction D1.
  • the retainer 690 includes a main body 691, a pair of lock pieces 692, and a pair of side walls 693.
  • the pair of lock pieces 692 and the pair of side walls 693 extend from both ends of the main body 691 in the third direction D3.
  • the lock piece 692 is disposed on one side (the right side in the figure) in the first direction D1 with respect to the side wall 693.
  • the main body 691 is adapted to be accommodated in the first mounting recess 645A.
  • the pair of lock pieces 692 and the pair of side walls 693 are adapted to be housed in the second mounting recess 645B.
  • the retainer 690 includes a lance 694 and a retaining portion 695.
  • the lance 694 extends from the main body portion 691 to the other side (the left side in the figure) in the first direction D1 and also to the other side (downward) in the second direction D2.
  • the lance 694 is elastically deformable with respect to the main body portion 691.
  • the retaining portion 695 protrudes from the main body portion 691 to the other side (downward) in the second direction D2.
  • the retaining portion 695 is generally block-shaped.
  • the removal prevention portion 695 does not enter the cavity 644, and only the tip of the lance 694 enters the cavity 644 through the first communication hole 643C1.
  • the third terminal 680 is allowed to be inserted from the opening on one side (the right side in the figure) of the cavity 644 in the first direction D1. This is because the removal prevention portion 695 is not positioned in a position that will interfere with the third terminal 680, and the lance 694 can elastically deform even if it interferes with the third terminal 680.
  • the lance 694 and the retaining portion 695 are disposed in the cavity 644 through the first communication hole 643C1.
  • the lance 694 is engaged with the inner wall of the locking hole 683A of the third terminal 680.
  • the retaining portion 695 is engaged with the end of the connecting tube portion 681 on one side (right side in the figure) in the first direction D1. This allows the third terminal 680 to be held in the cavity 644. That is, the third terminal 680 can be held against the resin portion 640.
  • the third terminal 680 is restricted from moving from the correct position in the cavity 644 to the other side (left side in the figure) in the first direction D1 by abutting against the edge (see FIG. 29) of the plate portion 31 of the second terminal 630 disposed in the cavity 644. Whether the third terminal 680 is in the correct position in the cavity 644 or is partially inserted can be confirmed by the second communication hole 643A1.
  • the retainer 690 has an insertion hole 693A that penetrates the side wall 693 in the third direction D3.
  • the shaft portion 646 is inserted into the insertion hole 693A.
  • the retainer 690 is rotatable about the shaft portion 646, and is movable between a provisional locking position and a full locking position.
  • the retainer 690 has a locking protrusion 692A that protrudes from the tip of the lock piece 692 toward the inner wall of the second mounting recess 645B.
  • the locking protrusion 692A is disposed between the temporary locking portion 647 and the full locking portion 648, thereby holding the retainer 690 in the temporary locking position.
  • the locking protrusion 692A is disposed on the other side (lower) in the second direction D2 relative to the full locking portion 648, thereby holding the retainer 690 in the full locking position.
  • the locking protrusion 692A engages with the full locking portion 648, thereby preventing the retainer 690 from rotating counterclockwise in FIG. 25 from the full locking position. Furthermore, the main body 691 and the inner wall of the first mounting recess 645A are engaged to prevent the retainer 690 from rotating clockwise in FIG. 25 from the main engagement position.
  • the above is the configuration of the fuse unit 610.
  • An example of a manufacturing method for the fuse unit 610 will be described below.
  • the resin part 640 is integrally molded with the first terminal 620 and the second terminal 630 by insert molding (see FIG. 29 ).
  • the first electrode 51 and the second electrode 52 of the chip fuse 50 are mounted on the first connection part 24 and the second connection part 34, respectively.
  • the retainer 690 is attached to the resin part 640, and the retainer 690 is placed in the temporary locking position. That is, the shaft part 646 is inserted into the insertion hole 693A, and the locking protrusion 692A is placed in the gap between the temporary locking part 647 and the full locking part 648.
  • the third terminal 680 which has been previously formed from a metal plate and connected to the electric wire 70, is inserted (see FIG. 23).
  • the lance 694 interferes with the connecting tube portion 681 and elastically deforms.
  • the lance 694 elastically returns to its original position and enters the locking hole 683A (see FIG. 24).
  • the retainer 690 When the third terminal 680 is placed in the correct position in the cavity 644, the retainer 690 is moved to the full locking position.
  • the lock piece 692 When the retainer 690 is rotated clockwise in FIG. 27 from the provisional locking position, the lock piece 692 is elastically deformed, and the locking projection 692A passes over the full locking portion 648.
  • the lock piece 692 moves to the other side (downward) in the second direction D2 relative to the full locking portion 648, the lock piece 692 elastically returns, and the retainer 690 reaches the full locking position (see FIG. 26).
  • the lance 694 enters the depth of the locking hole 683A, and the lance 694 and the inner wall of the locking hole 683A are arranged to be able to engage with each other (see FIG.
  • the removal prevention portion 695 is arranged on one side (the right side in the figure) in the first direction D1 relative to the connection tube portion 681, and is arranged to be able to engage with the connection tube portion 681. This holds the third terminal 680 in the cavity 644. This completes the manufacturing of the fuse unit 610.
  • the fuse unit 610 of embodiment 6 further includes a third terminal 680 to which a wiring member (electric wire 70) is connected, the second terminal 630 includes a first terminal connection portion (tab portion 633) connected to the third terminal 680, and the third terminal 680 includes a second terminal connection portion (connection tube portion 681) connected by fitting to the first terminal connection portion.
  • This configuration makes it easier to connect the wiring member to the second terminal 630.
  • the fuse unit 610 in the sixth embodiment further includes a retainer 690 that is attached to the resin part 640 and holds the third terminal 680.
  • the third terminal 680 can be held relative to the resin part 640, making it easier to determine the position of the third terminal 680 relative to the resin part 640.
  • the first terminal 620 or the second terminal 630 has a notch 625, 635 recessed from the outer edge, and the notch 625, 635 defines the first connection portion 24 or the second connection portion 34.
  • the first connection portion 24 or the second connection portion 34 is defined by the notches 625, 635, so that the size of the first connection portion 24 or the second connection portion 34 can be appropriately adjusted, and heat dissipation from the first connection portion 24 or the second connection portion 34 can be controlled when mounting the chip fuse 50.
  • a groove 641B is formed in the resin part 640, which is recessed toward the first connection part 24 and the second connection part 34, and the inner surfaces (first inner surface S1 and second inner surface S2) that form the groove 641B are continuous with the first connection part 24 and the second connection part 34, and a part of the groove 641B is disposed inside the notches 625, 635.
  • the shapes of the first terminal, the second terminal, and the resin part, and their relative arrangement are not limited to those described in the above embodiments 1 to 6, and may be modified as appropriate within the scope of the objectives of this disclosure.
  • the second terminal 30 has a plate-shaped wire connection portion 33 that is connected to the electric wire 70 by soldering, but the wire connection portion may also be, for example, a wire crimping portion that is crimped to the electric wire.
  • the end faces of the first terminal 20 and the second terminal 30 in the third direction D3 are substantially flush with the end face of the resin part 40 in the third direction D3 (see FIG. 7), but the end faces of the first terminal and the second terminal in the third direction D3 do not have to be substantially flush with the end face of the resin part in the third direction D3.
  • an aspect may be adopted in which the resin part 40 covers the end faces of the first terminal 20 and the second terminal 30 in the third direction D3, as shown in FIG. 33.
  • the electric wire 70 is fixed to the protector 80 by the protrusion 85 and the protrusion receiving portion 83B, but for example, the protrusion receiving portion may not be provided, and the electric wire may be fixed by the protrusion and the bottom surface of the intermediate wiring portion.
  • the shape of the fixing portion may be different from that described above. It is preferable that the fixing portion includes a first member that contacts the electric wire from one side in a direction perpendicular to the extension direction of the electric wire, and a second member that contacts the electric wire from the other side in a direction perpendicular to the extension direction of the electric wire and clamps the electric wire between the first member and the second member.
  • the first member and the second member may be formed integrally or separately.
  • the first member may be the bottom surface of the intermediate wiring portion
  • the second member may be a locking claw that extends elastically deformably from the bottom surface.
  • the protector body 80A and the lid 80B are connected by the hinge portion 80C, but the protector body and the lid may be formed separately.
  • the wiring member is an electric wire 70, but the wiring member does not have to be an electric wire.
  • the wiring module 703 may include a flexible substrate 770 (an example of a wiring member) as the wiring member.
  • the flexible substrate 770 is, for example, a flexible printed circuit board or a flexible flat cable.
  • the flexible substrate 770 and the second terminal 30 may be connected by, for example, soldering.
  • the bus bar and protector are omitted from FIG. 34.
  • the protector includes a fixing portion for fixing the flexible substrate 770.
  • the mounting surface 41 of the resin part 40 is flush with the first connection part 24 of the first terminal 20 and the second connection part 34 of the second terminal 30, but the mounting surface may be formed with a step relative to the first connection part and the second connection part.
  • the resin part 40 has a mounting surface 41 on which the chip fuse 50 is placed, but the resin part does not have to have a mounting surface. In other words, the resin part does not have to have a surface that contacts the chip fuse, and it is sufficient that the first electrode and the second electrode of the chip fuse are connected to the first connection part of the first terminal and the second connection part of the second terminal, respectively.
  • the fuse unit 610 includes a retainer 690 that is attached to the resin portion 640, but the fuse unit does not need to include a retainer. If no retainer is provided, the housing portion may be provided with a retaining portion for holding the third terminal within the cavity.
  • the tab portion 633 is exemplified as the first terminal connection portion
  • the connection tube portion 681 is exemplified as the second terminal connection portion
  • the first terminal connection portion may be the connection tube portion
  • the second terminal connection portion may be the tab portion
  • the shape of the retainer 690 in the above-mentioned embodiment 6 is one example, and the shape of the retainer may be changed as desired as long as it has the function of fixing the third terminal to the resin part.
  • the retainer 690 is held at a provisional locking position and a full locking position with respect to the resin part 640, but it is also possible to set only the full locking position and omit the provisional locking position.
  • the retainer may move linearly rather than rotating with respect to the resin part.

Landscapes

  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)
  • Fuses (AREA)
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PCT/JP2024/020163 WO2024248161A1 (ja) 2023-06-01 2024-06-03 配線モジュール
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