Wire harness and connection structure

Abstract

Provided is a feature that simplifies the work of connecting a connector. A wire harness (30) has a first electric wire (31), a second electric wire (32), and a common connector (35). The first electric wire (31) connects an interlock connector (33) to an ECU (16). The second electric wire (32) transmits a detection signal indicating the voltage value of an in-vehicle battery (12) to the ECU (16). The common connector (35) connects the first electric wire (31) and the second electric wire (32) to the ECU (16).

Description

Wire harness and connection structure

[0001] The present disclosure relates to a wire harness and a connection structure.

[0002] Patent Document 1 discloses a wire harness that connects an interlock connector to an ECU.

[0003] JP 2013-138570 A

[0004] When an electric wire for transmitting a detection signal indicating the voltage value of the vehicle battery is connected to the ECU separately from the wire harness, there is a problem that the number of connector connection operations tends to increase.

[0005] The present disclosure aims to provide a technique that can easily simplify the work of connecting connectors.

[0006] The wire harness of the present disclosure includes a first electric wire that connects an interlock connector to an ECU, a second electric wire that transmits a detection signal indicating a voltage value of an on-board battery to the ECU, and a common connector that connects the first electric wire and the second electric wire to the ECU.

[0007] A connection structure according to the present disclosure includes the wire harness according to the present disclosure and a substrate to which the wire harness is fixed at a position where the wire harness can be connected to each connection target.

[0008] According to the technology of the present disclosure, the connector connection work can be easily simplified.

[0009] Fig. 1 is a plan view showing a state before a connection structure of a first embodiment is connected to a connection object. Fig. 2 is a plan view showing a state in which the connection structure of the first embodiment is connected to a connection object. Fig. 3 is an explanatory diagram showing a state in which an interlock connector is temporarily held in a temporary holding portion. Fig. 4 is an explanatory diagram showing a state in which the interlock connector is connected to a connection object.

[0010] [Description of Embodiments of the Present Disclosure] First, embodiments of the present disclosure will be listed and described.

[0011] [1] A wire harness comprising: a first electric wire that connects an interlock connector to an ECU; a second electric wire that transmits a detection signal indicating a voltage value of an on-board battery to the ECU; and a common connector that connects the first electric wire and the second electric wire to the ECU.

[0012] According to the above-described wire harness, the first electric wire and the second electric wire can be connected to the ECU together by a common connector, which makes it easy to simplify the work of connecting the connectors.

[0013] [2] A connection structure comprising: the wire harness according to [1]; and a base material to which the wire harness is fixed at a position where it can be connected to each connection object.

[0014] According to this configuration, the wire harness is fixed at a position where it can be connected to each connection object. Therefore, a worker can position the wire harness and each connection object at a position where they can be connected simply by placing each connection object at a predetermined position and then installing the connection structure. In other words, the above-mentioned connection structure simplifies the work of connecting the wire harness to each connection object.

[0015] [3] The connection structure according to [2], further comprising a temporary holding portion that temporarily holds the interlock connector in a state in which the interlock connector can be displaced in the connection direction.

[0016] According to this configuration, the interlock connector can be temporarily held by the temporary holding portion, and the temporarily held interlock connector can be connected to a connection target by being displaced.

[0017] [4] A connection structure for connecting a plurality of on-board devices to an electrical connection box mounted on a vehicle, the connection structure having a plurality of wiring portions fixed to the base material, the plurality of wiring portions connecting each of the on-board devices to the electrical connection box, as described in [2] or [3].

[0018] According to the above-described connection structure, the wiring portion connecting each on-board device to the electrical junction box is fixed to the base material in advance. Therefore, a worker can simply place the electrical junction box and each on-board device in their predetermined positions and then install the connection structure to position the wiring portion so that it can be connected to the electrical junction box and each on-board device. In other words, the above-described connection structure simplifies not only the work of connecting the wire harness to each connection target, but also the work of connecting multiple on-board devices to the electrical junction box.

[0019] [5] The connection structure according to [4], wherein the on-board device includes the on-board battery, and the wiring portion connecting the on-board battery to the electrical connection box is positioned close to an end of the base material in a plan view.

[0020] The wiring portion connected to the vehicle battery is prone to heat generation due to the large current flowing through it. If the heat from the wiring portion is transmitted to the wire harness via the substrate, noise may be generated in the signals transmitted by the wire harness. In the above configuration, the wiring portion that is prone to heat generation is positioned close to the edge of the substrate. This makes it easier for the heat from the wiring portion to be released to the outside of the substrate. In other words, this configuration can suppress heat generation in the substrate.

[0021] 1 and 2 disclose an in-vehicle system 1 according to a first embodiment. The in-vehicle system 1 is a system mounted on a vehicle. The in-vehicle system 1 includes an electrical junction box 10 and a plurality of in-vehicle devices 11. The plurality of in-vehicle devices 11 includes an in-vehicle battery 12, an inverter 13, and a high-voltage auxiliary device 14. Each of the in-vehicle devices 11 is electrically connected to the electrical junction box 10. Power from the in-vehicle battery 12 is supplied to the inverter 13 and the high-voltage auxiliary device 14 via the electrical junction box 10.

[0022] The in-vehicle system 1 includes a connection structure 20. The connection structure 20 connects a plurality of in-vehicle devices 11 to the electrical junction box 10. The connection structure 20 includes a base material 21 and a plurality of wiring portions 22 fixed to the base material 21. The base material 21 has insulating properties. The base material 21 is made of, for example, resin.

[0023] The plurality of wiring sections 22 connect the respective on-board devices 11 to the electrical junction box 10. Each wiring section 22 is formed by a bus bar 23. A bolt insertion hole 25 is formed in the bus bar 23. The bolt insertion hole 25 penetrates in the vertical direction. The electrical junction box 10 is provided with a bolt fastening section 10A. The bolt fastening section 10A is provided on an upper portion of the electrical junction box 10. Each on-board device 11 is provided with a bolt fastening section 11A. The bolt fastening section 11A is provided on an upper portion of the on-board device 11. The connection structure 20 is placed on top of the electrical junction box 10 and the on-board device 11. The connection structure 20 is installed between the electrical junction box 10 and the on-board device 11. A bolt 80 is inserted through the bolt insertion hole 25 and fixed to the bolt fastening sections 10A, 11A. That is, each bus bar 23 is fixed to the electrical junction box 10 and each in-vehicle device 11 using a bolt 80 .

[0024] The wiring portions 22 that connect the vehicle battery 12 to the electrical junction box 10 are arranged close to the ends of the base material 21 in a plan view. The spacing between the wiring portions 22 is adjusted taking into account the magnitude of the current that flows.

[0025] The in-vehicle system 1 includes a sensor device 15 and an ECU 16. The sensor device 15 detects, for example, the voltage of the in-vehicle battery 12 and transmits a detection signal indicating the voltage value of the in-vehicle battery 12. The ECU 16 is an electronic control unit.

[0026] The in-vehicle system 1 includes a wire harness 30. The wire harness 30 connects the inverter 13 and the high-voltage auxiliary device 14 to the ECU 16, and also connects the sensor device 15 to the ECU 16. The wire harness 30 includes a first electric wire 31, a second electric wire 32, an interlock connector 33, a sensor-side connector 34, and a common connector 35.

[0027] The first electric wires 31 are insulated electric wires. A plurality of first electric wires 31 are provided. One end of each first electric wire 31 is held by an interlock connector 33. Each interlock connector 33 is connected to each on-board device 11 (e.g., the inverter 13, the high-voltage auxiliary device 14, etc.). Each interlock connector 33 is a connector that connects an interlock circuit to the on-board device 11. The interlock circuit has the function of interrupting current flowing between the on-board device 11 and the ECU 16 in the event of an abnormality, etc. The second electric wires 32 are insulated electric wires. One end of the second electric wires 32 is held by a sensor-side connector 34. The sensor-side connector 34 is connected to the sensor device 15. The other end of each first electric wire 31 and the other end of the second electric wire 32 are collectively held by a common connector 35. The common connector 35 is connected to the ECU 16.

[0028] The wire harness 30 is fixed to the base material 21. The wire harness 30 is fixed at a position where it can be connected to each connection object. The connection objects include the inverter 13, the high-voltage auxiliary device 14, the sensor device 15, the ECU 16, etc. In other words, each interlock connector 33 is fixed at a position where it can be connected to each on-board device 11. The sensor-side connector 34 is fixed at a position where it can be connected to the sensor device 15. The common connector 35 is fixed at a position where it can be connected to the ECU 16. The interlock connector 33, the sensor-side connector 34, and the common connector 35 are arranged on opposite sides of the base material 21.

[0029] As shown in FIGS. 3 and 4 , the connection structure 20 includes a temporary holding portion 40. The temporary holding portion 40 temporarily holds the interlock connector 33 so that the interlock connector 33 is displaceable in the connection direction. In the example shown in FIGS. 3 and 4 , the temporary holding portion 40 is provided on the interlock connector 33. The temporary holding portion 40 is configured, for example, by a leaf spring protruding outward from the outer periphery of the interlock connector 33. The interlock connector 33 is displaceable in the connection direction by fitting into a holding hole 21A in the base material 21. Furthermore, the interlock connector 33 is temporarily held on the base material 21 by the temporary holding portion 40 being caught on the peripheral portion of the holding hole 21A. When the interlock connector 33 is pressed in the connection direction, the leaf spring constituting the temporary holding portion 40 is pressed by the peripheral portion of the holding hole 21A and bends inward, releasing the temporary holding state and displacing in the connection direction. As a result, the interlock connector 33 is connected to each in-vehicle device 11.

[0030] As described above, according to the wire harness 30, the first electric wire 31 and the second electric wire 32 can be connected to the ECU 16 collectively by the common connector 35. In other words, according to the wire harness 30, the work of connecting the connectors can be easily simplified.

[0031] According to the connection structure 20, the wire harness 30 is fixed in a position where it can be connected to each connection object. Therefore, an operator can position the wire harness 30 and each connection object in a position where they can be connected by simply placing each connection object in a predetermined position and then installing the connection structure 20. In other words, according to the connection structure 20, the work of connecting the wire harness 30 to each connection object can be simplified.

[0032] According to the connection structure 20, the interlock connector 33 can be temporarily held by the temporary holding portion 40, and the temporarily held interlock connector 33 can be displaced to connect to the connection object.

[0033] According to the connection structure 20, the wiring portion 22 that connects each on-board device 11 to the electrical junction box 10 is fixed in advance to the base material 21. Therefore, an operator can position the wiring portion 22 in a position where it can be connected to the electrical junction box 10 and each on-board device 11 simply by placing the electrical junction box 10 and each on-board device 11 in predetermined positions and then installing the connection structure 20. In other words, the connection structure 20 simplifies not only the work of connecting the wire harness 30 to each connection target, but also the work of connecting multiple on-board devices 11 to the electrical junction box 10.

[0034] The wiring portion 22 connected to the vehicle battery 12 is prone to heat generation because a large current flows through it. If the heat from the wiring portion 22 is transmitted to the wire harness 30 via the substrate 21, noise may be generated in the signals transmitted by the wire harness 30. In the connection structure 20, the wiring portion 22, which is prone to heat generation, is positioned close to the edge of the substrate 21. This makes it easier for the heat from the wiring portion 22 to be released to the outside of the substrate 21. In other words, the connection structure 20 can suppress heat generation from the substrate 21.

[0035] <Other Embodiments> The present disclosure is not limited to the embodiments described above and in the drawings. For example, any combination of features of the above-described or below-described embodiments is possible within a range that does not contradict. Furthermore, any feature of the above-described or below-described embodiments may be omitted unless explicitly stated as essential. Furthermore, the above-described embodiments may be modified as follows.

[0036] (1) The wire harness does not have to be fixed to the base material. (2) The connection structure may not have a temporary holding portion. (3) The wiring portion does not have to be fixed to the base material. (4) The wiring portion connecting the on-board battery to the electrical junction box does not have to be positioned close to the edge of the base material in a plan view. (5) The positional relationship between the connection structure, the electrical junction box, and the on-board device is not limited to the configuration of the first embodiment. For example, the connection structure may be provided with a bolt fastening portion, and the electrical junction box may have a bolt insertion hole that passes through it vertically. Then, the electrical junction box may be placed on top of the connection structure, and a bolt may be inserted into the bolt insertion hole of the electrical junction box and fixed to the bolt fastening portion of the connection structure.

[0037] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is not limited to the embodiments disclosed herein, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0038] DESCRIPTION OF SYMBOLS 1...In-vehicle system 10...Electrical connection box 10A...Bolt fastening portion 11...In-vehicle device 11A...Bolt fastening portion 12...In-vehicle battery 13...Inverter 14...High-voltage auxiliary device 15...Sensor device 16...ECU 20...Connection structure 21...Substrate 21A...Retaining hole 22...Wiring portion 23...Bus bar 25...Bolt insertion hole 30...Wire harness 31...First electric wire 32...Second electric wire 33...Interlock connector 34...Sensor side connector 35...Common connector 40...Temporary holding portion 80...Bolt

Claims

1. A wire harness comprising: a first electric wire that connects an interlock connector to an ECU; a second electric wire that transmits a detection signal indicating the voltage value of an on-board battery to the ECU; and a common connector that connects the first electric wire and the second electric wire to the ECU.

2. A connection structure comprising: the wire harness according to claim 1; and a base material to which the wire harness is fixed at a position where it can be connected to each connection object.

3. The connection structure according to claim 2, further comprising a temporary holding portion that temporarily holds the interlock connector in a state in which the interlock connector can be displaced in the connection direction.

4. A connection structure for connecting a plurality of on-board devices to an electrical connection box mounted on a vehicle, the connection structure according to claim 2 or 3 having a plurality of wiring portions fixed to the base material, the plurality of wiring portions connecting each of the on-board devices to the electrical connection box.

5. The connection structure according to claim 4, wherein the on-board device includes the on-board battery, and the wiring portion connecting the on-board battery to the electrical connection box is positioned close to an edge of the base material in a plan view.

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