JP2008220017A - Cable connection structure for electric vehicles - Google Patents

Abstract

To provide a cable connection structure for an electric vehicle capable of improving maintenance workability and reducing cost in an electric vehicle in which a conductor cable is connected to an electric device.
A cable connection structure for an electric vehicle in which a lead wire cable terminal is connected to a removable electric device, and is formed separately from an electric device main body so as to pass through the lead wire cable. A terminal connection portion 22 having an insertion opening 22D; a bus bar 23 protruding from the electric device main body 21 toward the terminal connection portion 22 and electrically connected to the inside of the electric device main body 21 and the terminal 6A; The external connection part 22C which joins the terminal connection part 22 so that attachment or detachment is possible, 1st engagement part 21B formed in the electric equipment main body 21, and 2nd engagement part 22B formed in the terminal connection part 22 are comprised. The electric device main body 21 and the terminal connection portion 22 have an engaging portion.
[Selection] Figure 1

Description

  The present invention relates to a cable connection structure for an electric vehicle for connecting a lead wire cable for guiding electric power from a power supply source (battery) to an electric device in the vehicle in the electric vehicle.

In recent years, attention has been focused on electric vehicles including hybrid electric vehicles that drive vehicles with electric motors (hereinafter referred to as travel drive motors).
In general, an electric vehicle guides electric power from a battery or the like through a cable and supplies power to a motor for driving the vehicle (see, for example, Patent Document 1).
JP-A-8-48164

Here, a schematic configuration around the driving motor for the electric vehicle obtained in the inventive process will be described with reference to FIG. FIG. 6 is a schematic perspective view showing the electric vehicle partially seen from the rear of the vehicle.
As shown in FIG. 6, this electric vehicle (vehicle) 100 includes a travel drive motor 101 for driving the vehicle 100 and an MCU (motor control unit) 102 having an inverter and a controller (both not shown) inside. And a DC / DC converter 103 having a charger (not shown) therein.

The travel drive motor 101 is disposed on the rear axle, and an MCU 102 is disposed above the rear axle. A DC / DC converter 103 is disposed adjacent to the left side of the MCU 102.
The travel drive motor 101, MCU 102, and DC / DC converter 103 are fixed to a motor mount frame 104 via a bracket (not shown), and the motor mount frame 104 is fixed to a cross member of the vehicle 100 (not shown). Has been.

In addition, a battery (not shown) for storing electric power for driving the vehicle 100 is mounted on the front side of the MCU 102 and below the floor of the vehicle 100.
The MCU 102 and the traveling drive motor 101 and the MCU 102 and the battery are electrically connected via a plurality of conductive cables 106, and a direct current is supplied from the battery to the MCU 102, and an inverter in the MCU 102 converts the three-phase alternating current. After the conversion, electric power is supplied to the travel drive motor 101.

Reference numeral 105 denotes a drive system mechanism. The drive system mechanism 105 is a power transmission mechanism for transmitting the driving force of the travel drive motor 101 to drive wheels (not shown), and includes a differential gear, various shafts (not shown) and the like. It is connected to the drive motor 101 so that power can be transmitted.
Here, the configuration of the connecting portion between the conductive cable 106 and the MCU 102 will be described in more detail. As shown in FIG. 7, the MCU 102 is formed with a motor 101 disposed below and a terminal connection portion 102 </ b> A for connecting a terminal 106 </ b> A of a conductor cable 106 that connects the battery and the MCU 102. The terminal connection portion 102A is formed such that the upper portion of the MCU main body 102B projects in a horizontal direction in a cantilever shape.

Further, a bus bar 102C for electrically connecting the conductor cable 106 and the MCU main body 102B is provided inside the MCU 102, and a bolt hole having a screw groove corresponding to the bolt 113 is formed at the end of the bus bar 102C. Has been.
On the other hand, the conductive wire cable 106 is inserted into the MCU 102 from below the terminal connection portion 102A via the flange 111, and the flange 111 is pressure-bonded to the lower surface of the terminal connection portion 102 with a bolt 112. This prevents water from entering the MCU 102 from the insertion portion of the conductive wire cable 106.

  The leading end of the conductive wire cable 106 is a so-called round terminal, and the terminal 106A is round and annular so that the bolt 113 can pass therethrough. Then, the terminal 106 </ b> A and the bus bar 102 </ b> C of the conducting wire cable 106 are fastened from the front-rear direction of the vehicle by bolts 113. Thereby, MCU102 and the conducting wire cable 106 are electrically connected. In addition, a work window 114 that can be opened and closed is provided on the rear surface of the terminal connection portion 102A in order to perform the fastening work of the bolt 113.

When the driving motor 101 and the battery are disposed below the MCU 102 in terms of layout design like the vehicle 100, the conductor wire 106 is used to minimize the length of the conductor cable 106 as shown in the figure. It is preferable to route the cable 106 so as to be connected to the MCU 102 from below the MCU 102 (terminal introducing portion 102A).
By the way, in the vehicle 100 described with reference to FIGS. 6 and 7, when maintenance of equipment such as the motor 101 disposed below the MCU 102 is performed, the MCU 102 is removed from the vehicle 100 as shown in FIG. 8. Must be removed. Of course, it is necessary to remove the MCU 102 from the vehicle 100 when performing maintenance of the MCU 102 itself.

  However, when the MCU 102 is disposed below the floor 120 of the vehicle 100 (here, the floor of the luggage compartment) 120, as described above, the bus bar 102C and the conductor cable 106 are connected to the bolt 113 from the front and rear direction inside the MCU 102. Therefore, when the MCU 102 is removed from the vehicle 100 through the floor opening 120 </ b> A provided in the floor 120, the worker can once perform the work of removing the conductive cable 106 through the work window 114. It is necessary to lift the MCU 102 to a height (that is, a height such that the bolt 113 is higher than the floor 120). Moreover, it is necessary for the operator to perform the fastening release operation of the bolt 113 in a state where the MCU 102 is lifted. For this reason, in the vehicle 100 as described above, there is a problem that the maintenance work of the MCU 102 and the equipment below the MCU 102 becomes complicated.

Further, since it is necessary to lift the MCU 102 to a height at which work can be performed through the work window 114, it is necessary to secure a sufficient extra length for the conductor cable 106, and the conductor cable 106 is provided by this extra length. In addition, the cost of the vehicle increases and the weight of the vehicle increases.
In addition, since the conducting wire cable 106 used in the electric vehicle as described above has a large diameter and high rigidity, it is difficult to be elastically deformed. For this reason, even if a sufficient extra length is given to the conductor cable 106, a force to push the MCU 102 upward is applied by the elasticity of the extra length, and an unnecessary load is applied to the terminal 106A in normal installation. On the other hand, when the extra length of the conducting wire cable 106 is set to be small, there is a problem that due to the elasticity of the conducting wire cable 106, a larger load is applied when the MCU 102 is lifted, and workability is lowered.

These problems are not limited to the case where the lead wire cable 106 is connected to the MCU 102, and similar problems occur regardless of the type and application of the electrical device.
Also, the removal direction of the electric device is not limited to the vertical direction (vertical direction), and the same problem occurs when the conductor cable is connected to a position different from the removal side of the electric device.

  The present invention was devised in view of such problems, and in an electric vehicle in which a conductor cable is connected to an electric device, an electric vehicle cable connection structure capable of improving maintenance workability and reducing costs. The purpose is to provide.

  In order to achieve the above-described object, the cable connection structure for an electric vehicle according to the present invention (Claim 1) drives the vehicle to a predetermined electric device that is removable from the vehicle traveling by the driving force of the electric motor. A cable connection structure in an electric vehicle to which a terminal of a lead wire cable for supplying power from a power supply source is connected, the main body of the electric device being adjacent to the main body of the electric device A terminal connection portion formed separately from the electric device main body and having an insertion opening through which the conductor cable is inserted, and projecting from the electric device main body to the terminal connection portion side, and one end side is an interior of the electric device main body. A bus bar, the other end of which is electrically connected to the terminal of the conductor cable inside the terminal connecting portion, and the electric device body and the terminal connecting portion. An external joint for removably joining with a bolt from a direction along the direction of removing the device, a first engagement part formed on the main body of the electric device, and a second engagement part formed on the terminal connection part An engagement for bringing the electric device main body and the terminal connection portion into close contact with each other by joining the external joint portion with the first engagement portion and the second engagement portion engaged. And a portion.

Preferably, the electrical device is a motor control unit that controls the power supplied to the electric motor by adjusting the power supplied from the power supply source.
Further, the removal direction is a substantially vertical direction, the terminal connection portion is adjacent to the side surface of the electric device main body, and the external joint portion is attached to the upper surface of the electric device main body and the terminal connection portion with a bolt. It is preferable to be configured so that they can be joined together (claim 3).

Further, the terminal of the conductor cable and the bus bar are detachably connected by bolts from the removal direction, and the terminal of the conductor cable and the bus bar are connected to the surface of the terminal connection portion on the removal direction side. It is preferable that an access window that can be opened and closed is provided to perform the detaching operation.
In addition, the first engagement portion is formed in a tapered shape on the side surface of the electric device body, and the second engagement portion is formed in a tapered shape corresponding to the shape of the first engagement portion, The engaging portion brings the electric device main body and the terminal connecting portion into close contact with each other when the first engaging portion and the second engaging portion are engaged with each other by joining the external joining portion. It is preferable to be configured as described above (claim 5).

  According to the cable connection structure for an electric vehicle of the present invention (Claim 1), when the electric device is removed, the bolt of the external joint portion is loosened from the direction coinciding with the removal direction of the electric device, The joint with the terminal connection portion can be released, and the electric device main body can be removed from the vehicle as it is. Thereby, the operation | work which moves an electric equipment to a removal direction once is unnecessary, and joining of an electric equipment main body and a terminal connection part can be cancelled | released only by the operation | work from a removal direction, and an electric equipment main body can be removed. Thereby, workability | operativity at the time of a maintenance can be improved significantly. In addition, since it is not necessary to secure a surplus length in the conductor cable in order to move the electric device in the removal direction once, the conductor cable can be set shorter than the conventional one, and cost and weight can be reduced. In addition, there is an effect that space saving can be realized as much as the conductive wire cable can be set short.

  According to the cable connection structure for an electric vehicle of the present invention (Claim 2), since more conductor cables are introduced into the MCU, it is necessary to conduct a relatively high current to the MCU. Since a cable having a large cable diameter is used, each conductor cable has high rigidity and a large weight. However, improvement in maintainability and cost reduction can be achieved more effectively by setting the lead wire cable introduced into the MCU shorter than the conventional one.

According to the cable connection structure for an electric vehicle of the present invention (Claim 3), in the electric vehicle having the electric device into which the lead wire cable is introduced from below, it is not necessary to lift the heavy electric device once when removing the electric device. Further, workability required for maintenance work can be further improved.
According to the cable connection structure for an electric vehicle of the present invention (Claim 4), the terminal of the conductor cable and the bus bar can be securely connected, and the terminal of the conductor cable and the bus bar are attached and detached through the access window. Can be easily performed from the removal direction side.

  According to the cable connection structure for an electric vehicle of the present invention (Claim 5), when the bolt is screwed at the external joint portion, the second engaging portion formed in a tapered shape is moved to the first engaging portion side. When pressed, the adhesion between the electric device main body and the terminal connection portion is improved, thereby improving the waterproof property on the contact surface between the electric device main body and the terminal connection portion.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 are all for explaining a cable connection structure for an electric vehicle according to an embodiment of the present invention, and FIG. 1 is a side view of a configuration of a connection portion between an electric device and a conductor cable. FIG. 2 is a diagram schematically showing a schematic configuration of the electric vehicle in plan view, and FIG. 3 is a schematic perspective view partially showing the configuration in the vicinity of the rear portion of the electric vehicle from the rear of the vehicle. FIG. 4 is a perspective view schematically showing the configuration of the vicinity of the rear portion of the electric vehicle in an upper view, and FIG. 5 is a schematic view in a side view of the state where the connection between the electric device and the conductor cable is released. FIG.

As shown in FIGS. 2 and 3, the electric vehicle (vehicle) 50 includes a driving motor (electric motor) 1, an MCU (motor control unit, electric device) 2, a DC / DC converter (electric device) 3, a battery. (Power supply source) 8.
As shown in FIG. 3, the travel drive motor 1 applies a driving force for causing the vehicle 50 to travel, and is disposed on the rear axle in the present embodiment. The travel drive motor 1 causes the vehicle 50 to travel, and also functions as a generator during regenerative braking of the vehicle 50 to generate regenerative power.

The MCU 2 is disposed above the travel drive motor 1, and a DC / DC converter 3 is disposed adjacent to the left side of the MCU 2.
The MCU 2 has an inverter and a controller (both not shown) inside, adjusts the electric power supplied from the battery 8 and supplies the electric power according to the driving request to the driving motor 1. .

The DC / DC converter 3 is assembled by housing a charger (not shown) therein. The MCU 2 and the DC / DC converter 3 are also electrically connected so that the regenerative power generated by the traveling drive motor 1 can be rectified inside the DC / DC converter 3 and then supplied to the battery 8. It is configured.
The travel drive motor 1, MCU 2 and DC / DC converter 3 are fixed to a motor mount frame 4 via a bracket (not shown), and the motor mount frame 4 is fixed to a cross member of a vehicle 50 (not shown). Has been.

  The battery 8 is mounted on the lower part of the passenger compartment floor (not shown) of the vehicle 50 and stores electric power for driving the vehicle 50. As shown in FIG. 2, the MCU 2 and the battery 8 are electrically connected via the conductor cable 6, and the MCU 2 and the travel drive motor 1 are also connected via the conductor cable 6 as shown in FIG. 3. Electrically connected. As a result, a direct current is supplied from the battery 8 to the MCU 2, converted into a three-phase alternating current by an inverter in the MCU 2, and then driving power is supplied to the travel drive motor 1.

Further, the MCU 2 and the DC / DC converter 3 are also electrically connected, and the regenerative power generated by the travel drive motor can be once rectified inside the DC / DC converter 3 and then supplied to the battery 8. It is configured as follows.
In the vehicle 50, which is an electric vehicle, the MCU 2, the driving motor 1 and the DC / DC converter 3 and the like need to conduct a relatively large current. 6 is set to have a relatively large diameter and high rigidity.

Reference numeral 5 denotes a drive system mechanism. The drive system mechanism 5 is a power transmission mechanism for transmitting the driving force of the travel drive motor 1 to the wheels 7, and is constituted by a differential gear, various shafts, etc. (all not shown). It is connected to the power transmission.
As shown in FIGS. 1 and 4, the MCU 2 can be detached from the vehicle 50 in the vertical direction (removal direction) through the maintenance floor opening 40 </ b> A provided on the floor 40 of the vehicle 50.

  That is, by removing the MCU 2 from the vehicle 50, not only the maintenance of the MCU 2 itself but also the maintenance of the traveling drive motor 1 disposed below the MCU 2 and other devices (not shown) can be performed.

Here, the structure of the connection part of the some conducting wire cable 6 and MCU2 is demonstrated in detail.
As shown in FIG. 1, the MCU 2 includes an MCU main body (electric equipment main body) 21 and a terminal connection portion 22, and the upper surface of the MCU 2 is below the floor 40 of the vehicle 50 and the floor opening 40 A for maintenance. It is arranged.
The MCU main body 21 accommodates an inverter and a controller (both not shown) and constitutes the main part of the MCU 2.

On the other hand, the terminal connecting portion 22 is disposed separately from the MCU main body 21 adjacent to the side surface on the rear side of the MCU main body 21, and is formed in a box shape having a space inside.
The MCU main body 21 and the terminal connection portion 22 have openings 21A and 22A for enabling communication between the MCU main body 21 and the terminal connection portion 22, respectively. The MCU main body 21 and the terminal connection portion 22 are joined to each other. In this state, the positions of the openings 21A and 22A coincide with each other.

  And from the inside of the MCU main body 21, the bus bar 23 protrudes substantially horizontally to the terminal connection part 22 side through the opening parts 21A and 22A. One end of the bus bar 23 is electrically connected to the inside of the MCU main body 21, and a plurality of bus bars 23 are provided corresponding to the number of the conductor cables 6. Further, a bolt hole (not shown) in which a thread groove corresponding to the bolt 14 is cut is provided on the other end side of each bus bar 23.

The same number of insertion openings 22D as the conductor cables 6 are formed in the lower surface of the terminal connection portion 22 so that a plurality of conductor cables 6 can be inserted from below the MCU 2 along the vertical direction (that is, the removal direction of the MCU 2). It is installed. Each conductive wire cable 6 is inserted into the insertion opening 22 </ b> D via the flange 11.
The flange 11 is provided with a bolt hole (not shown) in which a thread groove corresponding to the bolt 12 is cut. That is, the upper surface of the flange 11 is pressure-bonded to the lower surface of the terminal connection portion 2 by fastening the bolt 12, thereby preventing water from entering the MCU 2 when the conductor cable 6 is inserted into the insertion opening 22D. it can. That is, the liquid tightness of the MCU 2 can be secured.

A so-called round terminal type terminal 6 </ b> A is formed at the tip of each conductor cable 6, and this terminal 6 </ b> A is formed in a circular shape with a diameter through which the bolt 13 can pass.
Each conductor cable 6 and each bus bar 23 are electrically connected to each other via a bracket 15. That is, the bracket 15 is formed by a conductor bent in an L shape at a substantially right angle, and bolt holes (not shown) having thread grooves corresponding to the respective bolts 13 and 14 are formed near both ends of the bracket 15. Yes.

  The bolts 14 are screwed into the respective bolt holes of the bracket 15 and the bus bar 23 from above, and the one end side of the bracket 15 and the bus bar 23 are electrically connected. On the other hand, the bolt 13 is screwed into the respective bolt holes of the terminal 6A and the bracket 15 from the rear (direction different from the removal direction of the MCU 2), and the other end side of the bracket 15 and the terminal 6A are electrically connected. Yes.

A work window (access window) 16 that can be opened and closed is provided on the upper surface of the terminal connection portion 22 in order to fasten the bolt 14 from above. Further, a work window 17 that can be opened and closed is provided on the rear side surface of the terminal connection portion 22 in order to perform the fastening work of the bolt 13 from the rear.
On the upper front side of the terminal connection portion 22, an external joint portion 22 </ b> C is formed that protrudes in a horizontal direction in a cantilever shape so as to be in contact with the upper surface of the MCU main body 21. As shown in FIG. 4, the external joint portion 22 </ b> C and the MCU main body 21 are joined by a plurality of bolts 18 arranged in parallel in the left-right direction.

  That is, a plurality of bolt holes (not shown) having thread grooves corresponding to the bolts 18 are formed in the external joint portion 22 </ b> C and the MCU main body 21. Each bolt 18 is screwed into the external joint 22C and the plurality of bolt holes on the upper surface of the MCU main body 21 from above to join the external joint 22C and the MCU main body 21. Although not shown, a packing (seal member) for maintaining liquid-tightness is provided between the MCU main body 21 and the terminal joint portion 22, and the external joint portion 22 </ b> C is secured by fastening with each bolt 18. And the MCU main body 21 are prevented from entering water, and the liquid tightness of the MCU 2 is ensured.

In FIG. 1, the bolts 18 inside the external joint 22 </ b> C and the MCU main body 21 are indicated by solid lines for easy understanding.
Further, a main body side taper portion (engagement portion, first engagement portion) 21 </ b> B projects from the rear side surface of the MCU main body 21. On the other hand, near the front and lower corners of the terminal connection portion 22, a terminal connection portion side taper portion (engagement portion, second engagement portion) 22 </ b> B as a second engagement portion is projected.

Among these, the main body side taper portion 21B is formed in a taper shape such that the length (width length) in the front-rear direction is shortened toward the terminal connection portion side taper portion 22B (upward). The connecting portion side taper portion 22B is formed in a tapered shape so that the length (width length) in the front-rear direction becomes shorter toward the main body side taper portion 21B (downward).
Thus, the terminal connecting portion side taper portion 22B enters between the main body side taper portion 21B and the MCU main body 21 so as to be pressed against each other in the vehicle front-rear direction and engaged with the MCU main body 21 and the terminal connection. It is comprised so that the part 22 may contact | adhere.

Since the electric vehicle cable connection structure according to the embodiment of the present invention is configured as described above, the following operations and effects are achieved.
That is, when removing the MCU 2 from the vehicle 50 vertically upward, as shown in FIG. 5, the operator first loosens the bolt 18 through the maintenance floor opening 40 </ b> A formed on the floor 40 from above, The connection between the MCU main body 21 and the external connection portion 22C of the terminal connection portion 22 is released.

Next, the operator opens the work window 16, loosens the fastening of each bolt 14 through the work window 16, and releases the joint between the bracket 15 and the bus bar 23.
By these operations, the joining of the MCU main body 21 and the terminal connection portion 22 by bolts is all released, and the engagement of the engagement portions of the main body side taper portion 21B and the terminal connection portion side taper portion 22B is easily released. Thus, the terminal connection portion 22 can be lifted upward. Thereby, the MCU main body 21 can be easily removed from the vehicle 50 through the floor opening 40 </ b> A without being interfered by the conductor cable 6.

  In addition, after the MCU main body 21 is removed, the fastening of each bolt 13 can be loosened through the work window 17 from above by inclining the terminal connecting portion 22 forward, and each of the terminal 6A and the bracket 15 can be loosened. The terminal connection portion 22 can be easily detached from the vehicle 50 without being interfered by the conductor cable 6 by releasing the joining, and all the MCUs 2 can be detached from the vehicle.

  In addition, when attaching the MCU 2 to the vehicle 50, the worker first joins the terminals 6A and the brackets 15 by screwing the bolts 13 to the terminals 6A and the brackets 15 through the work window 17 from above. Close the window. And after setting the MCU main body 21 to a predetermined position, the terminal connection part side taper part 22B of the terminal connection part 22 is inserted toward the main body side taper part 21B from above, and an engaging part is formed mutually.

Next, the external connection part 22C is placed on the upper surface of the MCU main body 21, and the bolts 18 are screwed into the bolt holes on the upper surface of the external connection part 22C and the MCU main body 21, thereby causing the external connection part 22C and the MCU main body 21 to Join.
Thereafter, the bolts 14 are screwed into the brackets 15 and the bus bars 23 through the work windows 16 to join the brackets 15 and the bus bars 23 together.

  The terminal connection side taper portion 22B is pushed downward (ie, the main body side taper portion 21B side) by the screwing of the bolt 18, and the main body side taper portion 21B and the terminal connection portion side taper portion 22B are more deeply engaged. Will match. At this time, the main body side taper portion 21B and the terminal connection portion side taper portion 22B become longer in the front-rear direction (width length) as they move closer to each other. As the portion 22B engages more deeply, the MCU main body 21 and the terminal connection portion 22 are pressed against each other in the front-rear direction, and water enters between the MCU main body 21 and the terminal connection portion 22 by closely contacting each other. This can be prevented and the liquid tightness of the MCU 2 is improved.

  Thus, according to the cable connection structure for an electric vehicle of the present invention, even when the MCU 2 is disposed below the floor opening 40A of the floor 40, the vertical direction (the removal direction of the MCU main body 21). Then, the bolt 18 is loosened so that the joint between the external joint 22C and the MCU main body 21 can be easily released. In addition, the bolts 14 can be loosened from the vertical direction (removal direction of the MCU main body 21) through the work window 16 so that the joint between the bracket 15 and the bus bar 23 can be easily released.

As a result, when removing the MCU 2 from the vehicle 50, it is possible to reduce the trouble of temporarily lifting the MCU 2 having a relatively large weight up to the height of the floor 40, thereby greatly improving workability during maintenance. be able to.
Moreover, the extra length of the conducting wire cable 6 should just be a grade which can cancel | release the engagement part of the main body side taper part 21B and the terminal connection part side taper part 22B, and reduces the extra length of the conducting wire cable 6 significantly. be able to. Thereby, cost and weight can be reduced. In addition, there is an effect that space saving of the vehicle 50 can be realized by the amount that the cable can be set short.

Furthermore, since the surplus length of the conductor cable 6 can be reduced, when the surplus length of the highly rigid conductor cable 6 is large, the load applied to the terminal 6A and the bus bar 23 due to the elastic force of the conductor cable 6 is reduced. can do.
Further, since the terminal 6A of the conductor cable 6 and the bus bar 23 are joined by the bolts 13 and 14 via the L-shaped bracket 15, the terminal 6A and the bus bar 23 can be reliably connected. In addition, it is possible to attach and detach the bracket 15 and the bus bar 23 from above through the work window 16, and the workability can be greatly improved.

  Further, the screw connection of the bolt 18 causes the terminal connection portion side taper portion 22B to be pressed against the main body side taper portion 21B, whereby the adhesion between the MCU main body 21 and the terminal connection portion 22 is improved. The waterproofness at the contact surface between the terminal connection portion 22 and the terminal connection portion 22 can be improved.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
In the above-described embodiment, the MCU is described as an example of the electrical device to which the conductor cable is connected. However, the electrical device to which the conductor cable is connected is not limited to the MCU, and any electrical device is applied. May be. In particular, a DC / DC converter and a vehicle drive motor in addition to the MCU need to conduct a relatively large current. Therefore, it is necessary to connect a larger-diameter and heavy-weight conductor cable, which is more effective. A cost reduction effect and a weight reduction effect can be obtained.

In the embodiment, the removal direction in which the electric device is detached from the vehicle is described as being in the vertical direction. However, in the present invention, the removal direction of the electric device is not limited to the direction in the embodiment, and may be any direction. It may be.
Also, the connection direction of the conductor cable connected to the electrical device is not particularly limited and may be any direction, but when the cable routing direction matches the removal direction of the electrical device. Is particularly effective.

BRIEF DESCRIPTION OF THE DRAWINGS It is for demonstrating the cable connection structure for electric vehicles which concerns on one Embodiment of this invention, Comprising: It is a figure which shows typically the structure of the connection part of an electric equipment and a conducting wire cable by a side view. BRIEF DESCRIPTION OF THE DRAWINGS It is for demonstrating the cable connection structure for electric vehicles which concerns on one Embodiment of this invention, Comprising: It is a figure which shows typically schematic structure of an electric vehicle by planar view. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view schematically illustrating a configuration of an electric vehicle near a rear portion of an electric vehicle according to an embodiment of the present invention with a partial perspective view from the rear of the vehicle. It is. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view schematically illustrating a configuration in the vicinity of a rear portion of an electric vehicle, as viewed from above, for explaining a cable connection structure for an electric vehicle according to an embodiment of the present invention. It is a figure for demonstrating the cable connection structure for electric vehicles which concerns on one Embodiment of this invention, Comprising: The state which cancelled | released the connection of an electric equipment and a conducting wire cable is a figure which shows typically a side view. FIG. 10 is a perspective view schematically illustrating a configuration of the vicinity of a rear portion of an electric vehicle from a viewpoint from the rear of the vehicle, for explaining a conventional technique. It is for demonstrating a prior art, Comprising: It is a figure which shows typically the structure of the connection part of an electric equipment and a conducting wire cable by a side view. FIG. 9 is a perspective view schematically illustrating a configuration in the vicinity of a rear portion of an electric vehicle, as viewed from above, for explaining a conventional technique.

Explanation of symbols

1 Vehicle drive motor (electric motor)
2 MCU (motor control unit, electrical equipment)
3 DC / DC converter 4 Motor mount frame 5 Drive system mechanism 6 Conductor cable 6A Terminal 7 Wheel 8 Battery (power supply source)
11 Flange 12, 13, 14, 18 Bolt 15 Bracket 16 Work window (access window)
17 Working window 21 MCU main body 21A Opening 21B Main body side taper part (first engaging part, engaging part)
22 Terminal connection part 22A Opening part 22B Terminal connection part side taper part (2nd engaging part, engaging part)
22C External junction 22D Insertion opening 40 Floor 40A Floor opening 50 Vehicle

Claims (5)

Cable connection in an electric vehicle in which a terminal of a lead wire cable for supplying electric power from a power supply source for driving the vehicle to a predetermined electric device removable from the vehicle is connected in a vehicle traveling by the driving force of an electric motor Structure,
An electric device main body constituting the main part of the electric device;
A terminal connection part formed adjacent to the electric device main body and separately from the electric device main body and having an insertion opening for inserting the conductive wire cable;
Projecting from the electrical device body to the terminal connection part side, one end side is electrically connected to the inside of the electrical device body and the other end side is electrically connected to the terminal of the conductor cable inside the terminal connection part A busbar,
An external joint for releasably joining the electrical device main body and the terminal connection portion with a bolt from a direction along the direction of removal of the electrical device;
A state in which the first engagement portion formed in the electric device main body and the second engagement portion formed in the terminal connection portion are engaged with each other. An electric vehicle cable connection structure comprising: an engaging portion that brings the electric device main body and the terminal connection portion into close contact with each other by joining the external joint portion. The electric vehicle cable connection structure according to claim 1, wherein the electric device is a motor control unit that controls electric power supplied to the electric motor by adjusting electric power supplied from the electric power supply source. . The removal direction is a substantially vertical direction,
The terminal connection portion is adjacent to the side surface of the electric device body,
3. The cable connection structure for an electric vehicle according to claim 1, wherein the external joint portion is configured to join the upper surface of the electric device main body and the terminal connection portion so as to be detachable with a bolt. . The terminal of the conductor cable and the bus bar are detachably connected from the removal direction by bolts,
2. An access window that is openable and closable is provided on a surface of the terminal connection portion on the removal direction side so that the terminal of the conductive wire cable and the bus bar can be attached and detached. The cable connection structure for electric vehicles of any one of -3. The first engagement portion is formed in a tapered shape on a side surface of the electric device main body,
The second engagement portion is formed in a tapered shape corresponding to the shape of the first engagement portion,
The engaging portion brings the electric device main body and the terminal connecting portion into close contact with each other when the first engaging portion and the second engaging portion are engaged with each other by joining the external joining portion. It is comprised as follows, The cable connection structure for electric vehicles of any one of Claims 1-4 characterized by the above-mentioned.

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