Electric motor coach

Abstract

To restrain an influence of an electromagnetic wave caused by an element serving as a source of the electromagnetic wave and disposed in a frontward space below an engine hood in a front part of a vehicle.SOLUTION: An electric motor coach comprises a battery which is installed on a vehicle, a driving device which includes a motor for traveling disposed on a front storage space located inside an engine hood in a front part of the vehicle, a power control unit which is disposed on an upper part of the driving device in the front storage space and drives the motor, and a charger which is disposed on the power control unit in the front storage space and charges a battery with electrical power from an external power source. The charger includes a first substrate which includes an element serving as a source of an electromagnetic wave, at least one second substrate which does not include an element serving as a source of an electromagnetic wave or includes an element with little impact as a source of an electromagnetic wave, and a storage case which stores the first substrate and the second substrate. The first substrate is disposed below the second substrate.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to electric vehicles. [Background technology]

[0002] A conventional electric vehicle of this type includes a step-down converter connected to an auxiliary power line connected to an auxiliary battery, and an auxiliary connected to the auxiliary power line via a filter (see, for example, Patent Document 1). In this electric vehicle, the auxiliary is connected via a filter to reduce the effect of noise current emitted from the step-down converter on the performance of the auxiliary. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-207054 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the electric vehicle described above, a filter is provided to prevent noise current from the step-down converter from affecting the performance of the auxiliary equipment, which increases the number of parts and complicates the circuit, preventing the vehicle from becoming smaller and lighter.

[0005] The electric vehicle of the present disclosure has a primary objective of suppressing the effects of electromagnetic waves from elements that are sources of electromagnetic waves and are located in the front space under the hood at the front of the vehicle. [Means for solving the problem]

[0006] The electric vehicle of the present disclosure employs the following measures to achieve the above-mentioned main object.

[0007] The electric vehicle disclosed herein is An electric vehicle comprising: a battery mounted on the vehicle; a drive unit having a driving motor arranged in a front storage space inside a hood at the front of the vehicle; a power control unit arranged above the drive unit in the front storage space and driving the motor; and a charger arranged above the power control unit in the front storage space and charging the battery with electric power from an external power source, The charger includes a first board having an element that is a source of electromagnetic waves, at least one second board that does not have an element that is a source of electromagnetic waves or has an element that has little effect as a source of electromagnetic waves, and a storage case that stores the first board and the second board, and the first board is disposed below the second board. It is characterized by:

[0008] The electric vehicle disclosed herein includes a battery mounted on the vehicle, a drive unit having a traction motor located in a front storage space inside the hood at the front of the vehicle, a power control unit located above the drive unit in the front storage space and driving the motor, and a charger located above the power control unit in the front storage space and charging the battery with power from an external power source. The charger includes a first board having an element that generates electromagnetic waves, at least one second board that does not have an element that generates electromagnetic waves or has an element that has little effect as a source of electromagnetic waves, and a storage case that houses the first board and the second board, with the first board located below the second board. As a result, the second board and the wall of the case are located above the element that generates electromagnetic waves, thereby shielding electromagnetic waves to some extent. As a result, the effects of electromagnetic waves from the element that generates electromagnetic waves can be suppressed. Here, the second board may be a board that only has elements that do not generate electromagnetic waves, or a board that has not only elements that do not generate electromagnetic waves but also elements that have little effect as a source of electromagnetic waves.

[0009] The electric vehicle of the present disclosure may include a radiator disposed forward of the motor, and the housing case may include a cooling channel member disposed between the first board and the second board through which a cooling medium from the radiator flows. In this way, the cooling channel and the second board are stacked in this order on the first board having an element that is a source of electromagnetic waves, thereby further enhancing the electromagnetic wave shielding effect. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram illustrating the outline of the configuration of a front portion of an electric vehicle 20 according to an embodiment of the present disclosure. [Figure 2] 5 is an explanatory diagram showing an example of how each of the circuit boards 52, 54, 55, and 56 of the AC charger 50 is stored in the storage case 51. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Next, a mode (embodiment) for carrying out the present disclosure will be described. Fig. 1 is a schematic diagram showing an outline of the configuration of the front portion of an electric vehicle 20 as one embodiment of the present disclosure.

[0012] The electric vehicle 20 of this embodiment is equipped with a drive unit 30 incorporating a motor for driving, which is located in a front storage space (sometimes referred to as a motor compartment) 22 below an openable hood 24 in the front portion of the vehicle. A power control unit 32 that drives the motor of the drive unit 30 is disposed above the drive unit 30. The power control unit 32 includes a step-up converter, an inverter, and the like (not shown), and converts DC power from a battery 40 located in the center or rear of the vehicle into three-phase AC power of a desired voltage and applies it to the motor.

[0013] In the electric vehicle 20 of this embodiment, an AC charger 50 is disposed above the power control unit 32 in the front storage space 22. The AC charger 50 is connected to an inlet 58 that accepts a connector from an external power source, and converts AC power from the external power source into DC power of a desired voltage to charge the battery 40.

[0014] 2 is an explanatory diagram showing an example of how the boards 52, 54, 55, and 56 of the AC charger 50 are stored in the storage case 51. The first board 52 is disposed in the lowest layer of the storage case 51. The second board 54 and the third board 55 are disposed above the board 52, with a cooling flow path 57 sandwiched between them. The fourth board 56 is disposed above the third board 55. A cooling medium cooled by a radiator 60 disposed at the front of the vehicle is supplied to the cooling flow path 57, and the cooling flow path 57 mainly cools the heat-generating elements attached to the first board 52, the second board 54, and the third board 55.

[0015] An element 53 that serves as a source of electromagnetic waves, such as a PFC coil for power factor correction, is attached to the first board 52. The second board 54, the third board 55, and the fourth board 56 do not have an element that serves as a source of electromagnetic waves, or elements that have little effect as sources of electromagnetic waves are attached to them. Therefore, in the electric vehicle 20 of this embodiment, the first board 52, on which the element 53 that serves as a source of electromagnetic waves in the AC charger 50 is attached, is arranged in the lowest layer of the storage case 51, and the cooling channel 57, the second board 54, the third board 55, and the fourth board 56 are stacked above it, thereby enhancing the electromagnetic wave shielding effect.

[0016] In the electric vehicle 20 of the embodiment described above, a drive unit 30 having a traction motor is disposed in the front storage space 22 inside the hood 24 at the front of the vehicle, a power control unit 32 that drives the motor is disposed above the drive unit 30, and an AC charger 50 is disposed above the power control unit 32. The AC charger 50 is mounted on the lowest level of a storage case 51, with a first board 52 having an element 53 that serves as a source of electromagnetic waves disposed above it. A second board 54, a third board 55, and a fourth board 56, each of which does not have an element that serves as a source of electromagnetic waves or has elements that have little effect as a source of electromagnetic waves, are disposed above the first board 52. In this way, the second board 54, the third board 55, and the fourth board 56 are located above the first board 52 having the element 53 that serves as a source of electromagnetic waves, as well as the wall of the storage case 51, so that electromagnetic waves can be shielded to a certain extent. As a result, the effects of electromagnetic waves from the element 53 that serves as a source of electromagnetic waves can be suppressed.

[0017] In the electric vehicle 20 of this embodiment, a cooling flow path 57 through which a cooling medium from the radiator 60 flows is arranged between the first board 52 having the element 53 that is a source of electromagnetic waves and the second board 54 and third board 55. This can further enhance the electromagnetic wave shielding effect.

[0018] The correspondence between the main elements of the embodiment and the main elements of the invention described in the "Means for Solving the Problem" section will be explained below. In the embodiment, the battery 40 corresponds to the "battery," the hood 24 corresponds to the "hood," the front storage space 22 corresponds to the "front storage space," the drive unit 30 corresponds to the "drive unit," the power control unit 32 corresponds to the "power control unit," the AC charger 50 corresponds to the "charger," the electric vehicle 20 corresponds to the "electric vehicle," the element 53 corresponds to the "element that serves as a source of electromagnetic waves," the first board 52 corresponds to the "first board," the second board 54 and the third board 55 correspond to the "second board," and the storage case 51 corresponds to the "storage case."

[0019] The correspondence between the main elements of the embodiments and the main elements of the invention described in the "Means for Solving the Problem" section does not limit the elements of the invention described in the "Means for Solving the Problem" section, since the embodiments are examples for specifically explaining the mode for implementing the invention described in the "Means for Solving the Problem" section. In other words, the interpretation of the invention described in the "Means for Solving the Problem" section should be based on the description in that section, and the embodiments are merely specific examples of the invention described in the "Means for Solving the Problem" section.

[0020] The present disclosure has been described above using embodiments, but the present disclosure is not limited to these embodiments in any way, and it goes without saying that the present disclosure can be embodied in various forms within the scope that does not deviate from the gist of the present disclosure. [Industrial Applicability]

[0021] The present disclosure is applicable to the electric vehicle manufacturing industry and the like. [Explanation of symbols]

[0022] 20 electric vehicle, 22 front storage space, 24 bonnet, 30 drive unit, 32 power control unit, 40 battery, 50 AC charger, 51 storage case, 52 first circuit board, 53 element, 54 second circuit board, 55 third circuit board, 56 fourth circuit board, 57 cooling channel, 58 inlet.

Claims

1. An electric vehicle comprising: a battery mounted on the vehicle; a drive unit having a driving motor arranged in a front storage space inside a hood at the front of the vehicle; a power control unit arranged above the drive unit in the front storage space and driving the motor; and a charger arranged above the power control unit in the front storage space and charging the battery with electric power from an external power source, The charger includes a first board having an element that serves as a source of electromagnetic waves, at least one second board that does not have an element that serves as a source of electromagnetic waves or has an element that has little effect as a source of electromagnetic waves, and a storage case that stores the first board and the second board, and the first board is disposed below the second board. An electric vehicle characterized by:

2. The electric vehicle according to claim 1, a radiator disposed forward of the motor, a cooling flow path through which a cooling medium from the radiator flows is disposed between the first substrate and the second substrate in the storage case; Electric car.

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