JP6967500B2 - Shielded wire installation structure, branch connector and battery pack - Google Patents

Description

The present invention relates to a shielded wire installation structure, a branch connector and a battery pack.

Conventionally, in a battery bag used for an electric vehicle, a junction box having a fuse board is arranged inside the battery pack, and high voltage branching is performed in the junction box according to the number of electric devices (auxiliaries). Was there. The same number of cables (connection lines) as the number of branches are provided from the fuse board to the outlet of the battery pack, and the same number of connectors as the number of branches are provided at the end of the cable at the outlet of the battery pack. The electrical connection was made (see, for example, Patent Document 1).

As such a cable, a cable having a shielded electric wire is used. Patent Document 2 discloses an installation structure of a shielded electric wire in which no slit remains between the end faces of the shield terminal after caulking and one of the end faces of the shield terminal does not ride on the other. In this structure, in order to ground the shielded electric wire, the shielded terminal is crimped to the electric wire and fixed to the connector with bolts or the like.

Japanese Patent Application No. 2018-149464 Japanese Patent Application Laid-Open No. 2002-218622

However, when the installation structure of the shielded electric wire described in Patent Document 2 is applied to the connector of Patent Document 1, the shielded terminal is fixed to the grounding portion of the connector with the shielded electric wire crimped, so that the shielded electric wire after fixing is free. It was difficult to absorb the dimensional tolerance between the parts of the electric wire, terminal, and connector. Therefore, stress is applied to each part, which causes deterioration, disconnection, and the like.

An object of the present invention is to provide an installation structure of a shielded electric wire capable of absorbing a dimensional tolerance between parts by making a shield terminal for grounding movable with respect to the shielded electric wire.

(1) The present invention has a grounding structure for a shielded electric wire (for example, a branch cable 50 described later), and the shielded electric wire has a main body portion (for example, the main body portion 500 described later) and a first cylindrical component (for example, a first cylindrical component (for example)). It has a first cylindrical part 505) described later and a second cylindrical part made of metal (for example, a second cylindrical part 506 described later), and the main body portion has a core wire (for example, a core wire 501 described later). An insulating portion that covers the core wire (for example, an insulating portion 502 described later), a shielded wire arranged on the outer periphery of the insulating portion (for example, a shielded wire 503 described later), the core wire, the insulating portion, and the above. It has a shielded wire and a sheath (for example, a sheath 504 described later) which is formed on the outermost periphery of the shielded electric wire by covering the shielded wire, and is configured to penetrate the inner circumference of the first cylindrical component. The cylindrical part is movable in the axial direction of the shielded electric wire, and the second cylindrical part has a grounding portion (for example, a grounding portion 508 described later) and is arranged on the outer periphery of the first cylindrical part to be shielded. The wire provides a grounding structure for a shielded wire, one end of which is electrically connected and fixed to the second cylindrical component.

As a result, the degree of freedom in arranging the shielded electric wires is improved, so that it is possible to absorb the dimensional tolerances of the parts when assembling the electric equipment having the wiring, it is possible to suppress the generation of stress on the parts, and the assembling property is improved. ..

(2) In the grounding structure of the shielded electric wire of (1), the inner diameter of the first cylindrical component may be larger than the outer diameter of the sheath.

As a result, the first cylindrical component becomes movable in the axial direction of the shielded electric wire.

(3) In the grounding structure of the shielded electric wire of (1) or (2), the shielded wire is sandwiched between the radial outer surface of the first cylindrical component and the radial inner surface of the second cylindrical component. It may be fixed.

(4) In the grounding structure of the shielded electric wire of (3), the second cylindrical part is a caulking part, and the shielded wire may be sandwiched by caulking the first cylindrical part.

This makes it possible to easily assemble without the need for other fixing means such as an adhesive.

(5) Further, the present invention is a branch connector having a plurality of shielded electric wires (1) to (4) and a coupling portion (for example, a coupling portion 25 described later) that aggregates the plurality of shielded electric wires. (For example, the branch connector 30 described later), the branch connector is electrically connected to both the plurality of shielded electric wires and the object to be fixed to which the branch connector is fixed, and the plurality of shields. A branch connector in which each electric wire is fixed to the branch connector at one end and connected to an electric device (for example, auxiliary machines 21a to 21c described later) at the other end.

As a result, in the branch connector as described in Patent Document 2, the distance between the fixed position of the electric wire integrated in the connector and the fixed position of the caulking part is short and it is difficult to absorb the dimensional tolerance. The caulking part is movable in the axial direction of the electric wire, and the absorption of dimensional tolerances is easily realized.

(6) Further, the present invention is a drive battery pack for an electric vehicle having a drive battery, a metal housing for accommodating the drive battery, and the branch connector of (5), wherein the shield is provided. The electric wire is connected to the drive battery, and the branch connector provides a drive battery pack that is fixed to the metal housing.

As a result, when the occupancy rate of the drive battery in the storage space in the battery pack is increased, it is possible to absorb the dimensional tolerance between the branch connector parts even in a narrow space. Therefore, the inventions (1) to (5) have been made. The effect can be used particularly effectively. Further, since the branch connector is in contact with and fixed to the metal housing, grounding can be performed more easily.

According to the installation structure of the shielded electric wire of the present invention, the dimensional tolerance between the parts can be absorbed by making the shield terminal for grounding movable with respect to the shielded electric wire.

It is a figure which shows typically the electric connection relation of the power supply device for the electric vehicle which concerns on one Embodiment of this invention. It is a figure which shows the structure of the shielded electric wire of this embodiment. It is a perspective view which shows the IPU into which the branch connector of this embodiment is inserted. It is sectional drawing which shows typically the branch connector and IPU after insertion of this embodiment. It is a figure which shows typically the structure of the branch connector of this embodiment. It is a figure which shows typically the structure of the branch connector of this embodiment.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Since the basic configuration of the power supply device 1 according to the embodiment of the present invention is the same as that of the power supply device 1 described in Patent Document 2, the basic configuration thereof will be described in detail below.

<Power supply configuration>
FIG. 1 is a diagram schematically showing an installation structure of a power supply device 1 according to an embodiment of the present invention.
As shown in FIG. 1, the power supply device 1 according to the present embodiment is used to supply electric power to an electric device arranged in an engine room 2 or a floor 3 of a vehicle. The power supply device 1 of the present embodiment includes an IPU (Intelligent Power Unit) 10 and an interface unit 7 for connecting a plurality of auxiliary machines 20a, 20b, 20c to be supplied with electric power to the IPU 10.

The IPU 10 is a battery pack for driving an electric vehicle (vehicle). The IPU 10 includes a battery 11 and a junction box 12. A connector cable 15 connected to the interface unit 7 and a PCU connector cable 16 branched from the connector cable 15 and connected to the PCU connector 17 are connected to the junction box 12.

A connector 55 provided at one end of the PCU cable 54 is connected to the PCU connector 17. The connector 56 provided at the other end of the PCU cable 54 is connected to the connector 6 of the PCU (Power Control Unit) 5 arranged in the engine room 2. The PCU 5 is electrically connected to the IPU 10 without going through the branch connector 30.

The branch connector 30 is a high-voltage compatible connector that electrically connects the IPU 10 and the auxiliary devices 20a to 20c. The auxiliary machine 20a is an A / C compressor arranged in the engine room 2 and has a device-side connector 21a. The device-side connector 21a is connected to a connector 51 provided at one end of the intermediate cable 58. At the other end of the intermediate cable 58, a connector 59 corresponding to the connector 51 of the branch cable 50 described later is provided.

Auxiliary machines 20b and 20c are arranged on the floor 3. The device-side connectors 21b and 21c are connected to the connector 51 of the branch cable 50, which will be described later.

The branch connector 30 includes a coupling portion 25 that electrically connects the battery 11 side and the auxiliary machines 20a to 20c side. A plurality of branch cables 50 are aggregated in the coupling portion 25.

Each of the branch cables 50 branched into a plurality of branches is electrically connected to the auxiliary machines 20a to 20c. Further, each branch cable 50 is divided into a battery 11 side and an auxiliary machine 20a to 20c side, and the battery 11 side and the auxiliary machine 20a to 20c side are electrically connected via a fuse 31 corresponding to a high voltage. A connector (connector) 51 connected to the device-side connectors 21a to 21c is arranged at the outer end of the branch connector 30 in the branch cable 50.

<Structure of branch cable>
FIG. 2 is a diagram showing a configuration of a shielded electric wire of the present embodiment.
The branch cable 50 is a shielded electric wire, and includes a main body portion 500, a first cylindrical component 505, and a metal second cylindrical component 506. The main body portion 500 covers the core wire 501, the insulating portion 502 covering the core wire 501, the shielded wire 503 arranged on the outer periphery of the insulating portion 502, the core wire 501, the insulating portion 502, and the shielded wire 503. It has a sheath 504 configured on the outermost circumference of the branch cable 50, and is configured to penetrate the inner circumference of the first cylindrical component 505.

The core wire 501 is a conductive wire that conducts electricity from a battery to an electric device. The insulator 502 insulates the core wire 501 and the shielded wire 503. The shielded wire 503 shields electromagnetic waves from the outside with respect to the internal core wire 501 to prevent interference. The sheath 504 is an insulator that appears on the outermost surface of the branch cable 50, and protects the surface of the shielded wire 503 from being exposed.

The inner diameter of the first cylindrical component 505 is larger than the outer diameter of the sheath 504, and the first cylindrical component 505 is movable in the axial direction of the branch cable 50. Further, the second cylindrical component 506 has a grounding portion 508 and is arranged on the outer periphery of the first cylindrical component 505. The shielded wire 503 is exposed at the end of the branch cable 50, and the tip is fixed to the second cylindrical component 506. Further, the shield wire 503 is electrically connected to the second cylindrical part 506 and is sandwiched between the radial outer surface of the first cylindrical part 505 and the radial inner surface of the second cylindrical part 506, and the second cylindrical part 506 is sandwiched between the radial outer surface and the second cylindrical part 506. It is fixed by crimping the first cylindrical component 505.

With such a configuration, even when the first cylindrical component 505 is movable, the second cylindrical component 506 can ground the shielded wire 503 corresponding to the position of the first cylindrical component 505. As a result, the degree of freedom in the arrangement of the branch cable 50 is improved, the dimensional tolerance can be absorbed at the time of assembling the parts, the generation of stress on the parts can be suppressed, and the assembling property of the equipment is improved.

<Structure of branch connector>
Next, the structure of the IPU 10 to which the branch connector 30 and the branch connector 30 are connected will be described. FIG. 3 is a perspective view showing the IPU 10 into which the branch connector 30 of the present embodiment is inserted. Note that FIG. 3 omits the illustration of the branch cable 50 pulled out to the outside of the IPU 10 described later. FIG. 4 is a cross-sectional view schematically showing the branch connector 30 and the IPU 10 of the present embodiment. In FIGS. 3 and 4, Fr indicates the front side of the vehicle.

The branch connector 30 shown in FIG. 3 integrates a high voltage branch portion, a high voltage fuse, and a connector portion. The branch connector 30 of the present embodiment is configured to be removable with respect to the side wall 111 of the case 110 of the IPU 10.

An IPU-side connector 120 to which the branch connector 30 is connected is formed on the side wall 111 of the case 110 of the IPU 10. The IPU-side connector 120 has a slot 115 that communicates with the outside of the case 110 and extends in the horizontal direction, and the branch connector 30 is inserted into the slot 115. The branch connector 30 is a male type connector for the IPU 10, and the IPU side connector 120 is a female type connector for the branch connector 30.

Inside the slot 115 of the IPU side connector 120 of the present embodiment, a connector connection portion 60 to which the branch connector 30 is electrically connected and a guide rail 121 that guides the insertion of the branch connector 30 into the slot 115 are provided. It will be provided.

The connector connection portion 60 is located on the inner side of the slot 115 and is electrically connected to the battery 11 via the junction box 12. The connector connection portion 60 includes a plurality of fitting pins 61 extending toward the opening side of the slot 115, and when the branch connector 30 is fitted to the fitting pin 61, the branch connector 30 is fitted to the connector connection portion 60. Be connected.

As shown in FIG. 4, the coupling portion 25 of the branch connector 30 includes a main cable 26 connected to the battery 11 side and a branch cable 50 that branches from the main cable 26 into a plurality of branches according to the number of auxiliary machines 20a to 20c. It is a high voltage compatible power branch.

5 and 6 are diagrams schematically showing the internal configuration of the branch connector 30 of the present embodiment.
A plurality of branch cables 50 are wired inside the branch connector 30, and each cable is fixed to the main body of the branch connector 30 with a bolt or the like at the fixing portion 507 at the tip thereof, and is connected to the main cable 26 at the connecting portion 25. Further, the second cylindrical component 506 is also similarly fixed to the branch connector 30 main body with bolts or the like at the plate-shaped grounding portion 508.

In a branch connector in which multiple branch cables are integrated and wired, the distance between the fixed position at the tip of the cable and the fixed position at the grounding part is short due to the compact configuration, and depending on the dimensional tolerance, a load may be applied between the fixed positions of the cable. Since such a problem is likely to occur, the effect of the shielded electric wire (branch cable 50 described above) of the present invention works particularly effectively. That is, according to the branch connector 30 of the present embodiment, since the branch cable 50 is movable in the cable axial direction with respect to the grounding portion 508, the dimensional tolerance of the parts is absorbed, and the stress generation on the cable is satisfactorily suppressed. , The assembleability of the branch connector is improved.

Further, the branch connector 30 includes a metal portion 32 for grounding. That is, the shielded wire 503 is connected to the connector metal portion 32 via the metal plate-shaped grounding portion 508, and the connector metal portion 32 is further contacted and fixed to the conductive IPU case 110 (not shown in FIG. 5). As a result, the shielded wire 503 can be easily grounded.

In addition to the coupling portion 25 and the fuse 31, the branch connector 30 of the present embodiment includes a housing (main body portion) 40, a flange portion (protruding portion) 41, a waterproof rubber stopper 45, a seal portion 46, and a slot. A fitting portion 47 is provided.

The housing 40 is a portion that accommodates the branch cable 50, the coupling portion 25, the fuse 31, and the like, is inserted into the slot 115, and is housed inside the IPU 10. The housing 40 has an engaging portion corresponding to the guide rail 121 and is smoothly inserted into the slot 115 by the guide rail 121. The flange portion 41 is formed at one end of the housing 40 in the longitudinal direction, and is a portion located outside the IPU 10 in a state where the branch connector 30 is attached to the IPU side connector 120.

The waterproof rubber stopper 45 is an elastic member fitted into the opening 48 formed in the center of the flange portion 41. The waterproof rubber stopper 45 is formed with a through hole 49 for passing the branch cable 50 (see FIG. 3). The branch cable 50 inside the housing 40 is pulled out to the outside of the branch connector 30 through the through hole 49 of the waterproof rubber stopper 45. By setting the number of through holes 49 of the waterproof rubber stopper 45 according to the number of branches of the branch cable 50 in the housing 40, the number of branches can be increased or decreased. For example, as in the present embodiment, when there are three auxiliary machines 20a to 20c to be connected, three through holes 49 are used, and in the case of four, four through holes 49 are used for the branch cable 50. The waterproof rubber stopper 45 is designed so as to be pulled out to the outside of the branch connector 30.

The seal portion 46 is an elastic member that closes the gap between the housing 40 and the opening side of the slot 115. In this embodiment, it is provided on the outer peripheral surface of the housing 40. The seal portion 46 may be provided not on the branch connector 30 side but on the slot 115 side of the IPU side connector 120.

The slot fitting portion 47 is arranged at the other end of the housing 40 in the longitudinal direction. By connecting the fitting pin 61 of the connector connecting portion 60 to the slot fitting portion 47, the branch connector 30 is attached to the IPU side connector 120.

As shown in FIG. 4, the branch connector 30 is inserted into the slot 115 of the IPU side connector 120 from the front side in the horizontal direction and is electrically connected to the battery 11.

In this embodiment, the IPU 10 is arranged under the floor 3 of the electric vehicle. Even with such an arrangement, since the branch connector 30 is configured to be able to be inserted and removed in the horizontal direction with respect to the IPU 10, the branch connector 30 can be inserted and removed without removing the IPU 10 from the installation location.

Next, the electrical connection between the branch connector 30 and the auxiliary machines 20a to 20c will be described. A connector 51 is arranged at the end of the branch cable 50 drawn out from the branch connector 30, and the device-side connectors 21a to 21c are connected to the connector 51 to connect the branch connector 30 and the auxiliary machines 20a to 20c, respectively. Will be done. As a result, the battery 11 is connected to the auxiliary machines 20a to 20c via the coupling portion 25 of the branch connector 30, and power can be supplied from the battery 11 to the auxiliary machines 20a to 20c.

The installation structure of the shielded electric wire of the present embodiment described above includes a main body portion, a first cylindrical component, and a second metal cylindrical component, and the main body portion covers the core wire and the core wire. It has an insulating portion, a shielded wire arranged on the outer periphery of the insulating portion, a core wire, a sheath covering the insulating portion and the shielded wire, and a sheath formed on the outermost periphery of the shielded electric wire. The first cylindrical part is configured to penetrate the inner circumference of the first cylindrical part, the first cylindrical part is movable in the axial direction of the shielded electric wire, and the second cylindrical part has a grounding portion and the first. Arranged on the outer periphery of the cylindrical component, one end of the shielded wire is electrically connected to and fixed to the second cylindrical component.
As a result, the degree of freedom in arranging the shielded electric wires is improved, so that it is possible to absorb the dimensional tolerances of the parts when assembling the electric equipment having the wiring, it is possible to suppress the generation of stress on the parts, and the assembling property is improved. ..

Further, the inner diameter of the first cylindrical component is larger than the outer diameter of the sheath.
As a result, the first cylindrical component becomes movable in the axial direction of the shielded electric wire.

Further, the shielded wire is sandwiched between the radial outer surface of the first cylindrical part and the radial inner surface of the second cylindrical part, and the second cylindrical part is a caulking part and is the first cylindrical part. It is fixed by crimping.
This makes it possible to easily assemble without the need for other fixing means such as an adhesive.

Further, the branch connector of the present embodiment is a branch connector having the plurality of shielded electric wires and a coupling portion for collecting the plurality of shielded electric wires, and the branch connector is the plurality of shielded electric wires and the said. The branch connector is electrically connected to both the fixed object to which the branch connector is fixed, and the plurality of shielded electric wires are fixed to the branch connector at one end and connected to an electric device at the other end.
In particular, in a compact branch connector as described in Patent Document 2, the distance between the fixed position of the tip of the electric wire integrated in the connector and the fixed position of the grounding portion is short, and the fixed position of the cable depends on the dimensional tolerance of the component. Where the problem of a load being applied between them is likely to occur, according to the branch connector of the present embodiment, the branch cable is movable with respect to the grounding portion, so that the dimensional tolerance can be easily absorbed.

Further, the drive battery pack for an electric vehicle according to an embodiment of the present invention includes a drive battery, a metal housing for accommodating the drive battery, and the above-mentioned branch connector, and the shielded electric wire. Is connected to the drive battery, and the branch connector is fixed to the metal housing.

In a battery pack for an automobile, a compact branch connector is preferably used because it is preferable to increase the occupancy rate of the drive battery in the internal storage space. That is, in the battery pack of the present invention, by using the above-mentioned branch connector, the occupancy rate of the drive battery in the battery pack can be increased, and the dimensional tolerance of the branch connector can be easily absorbed. Further, since the branch connector is in contact with and fixed to the metal battery pack housing, the shielded wire can be grounded more easily.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment and can be appropriately modified.

In the above embodiment, the shielded electric wire of the present invention is a branch cable 50 and has a configuration used for the branch connector 30, but the use of the shielded electric wire of the present invention is not limited to this configuration. The shielded electric wire of the present invention can be used as long as it is an electric device or the like having a shielded electric wire.

In the above embodiment, the path for supplying electric power to the PCU 5 is configured not to pass through the branch connector 30, but is not limited to this configuration.

The configuration of the power supply device 1 shown in the above embodiment is an example, and the number and arrangement locations of the auxiliary machines 20a to 20c as electric devices can be appropriately changed according to the vehicle type, grade, and the like.

1 Power supply
3 floors
7 Interface part 10 IPU (battery pack)
11 Battery 20a, 20b, 20c Auxiliary equipment 25 Coupling part 30 Branch connector 32 Branch connector Metal part 50 Branch cable (shielded wire)
500 Branch cable body 501 Core wire 502 Insulator 503 Shielded wire 504 Sheath 505 1st cylindrical part 506 2nd cylindrical part 507 Fixed part 508 Grounding part

Claims (6)

It is a grounding structure for shielded wires.
The shielded electric wire has a main body portion, a first cylindrical component, and a second cylindrical component made of metal.
The main body has a core wire and
The insulating part that covers the core wire and
A shielded wire arranged on the outer circumference of the insulating portion and
It has a sheath that covers the core wire, the insulating portion, and the shielded wire and is formed on the outermost circumference of the shielded electric wire, and is configured to penetrate the inner circumference of the first cylindrical component.
The first cylindrical component is movable in the axial direction of the shielded electric wire.
The second cylindrical component has a grounding portion and is arranged on the outer periphery of the first cylindrical component.
The shielded wire has a grounding structure for a shielded electric wire, one end of which is electrically connected to and fixed to the second cylindrical component. The grounding structure for a shielded electric wire according to claim 1, wherein the inner diameter of the first cylindrical component is larger than the outer diameter of the sheath. The grounding of the shielded electric wire according to claim 1 or 2, wherein the shielded wire is fixed by being sandwiched between the radial outer surface of the first cylindrical component and the radial inner surface of the second cylindrical component. structure. The grounding structure for a shielded electric wire according to claim 3, wherein the second cylindrical component is a caulking component, and the shielded wire is sandwiched by caulking the first cylindrical component. A branch connector comprising the shielded electric wire according to any one of claims 1 to 4 and a coupling portion for aggregating the plurality of shielded electric wires.
The branch connector is electrically connected to both the plurality of shielded electric wires and the object to be fixed to which the branch connector is fixed.
A branch connector in which the plurality of shielded electric wires are fixed to the branch connector at one end and connected to an electric device at the other end. A drive battery pack for an electric vehicle comprising a drive battery, a metal housing accommodating the drive battery, and the branch connector according to claim 5.
The shielded wire is connected to the drive battery and is connected to the drive battery.
The branch connector is a drive battery pack fixed to the metal housing.

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