Shielding Device

Abstract

To improve energy efficiency.SOLUTION: A shield device includes: a shield member which covers a power transmission cable for connecting a charging port provided at a vehicle and attached with a charging plug, with a charger which charges a driving source battery, and generates electricity by noise; and a supply device which supplies the electricity generated by the shield member to a device which is supplied with the electricity.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to the technical field of shield devices provided in vehicles. [Background technology]

[0002] As described in Patent Document 1, a vehicle has been proposed in which a shielding section is provided between a circuit section in which electronic components are mounted and an energy storage element to block noise generated from the circuit section and external noise. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-127748 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, there has been a demand for greater energy efficiency. However, the above-mentioned vehicle only blocks noise with the shielding portion, and therefore cannot be said to have achieved greater energy efficiency.

[0005] The present invention has been made in view of the above circumstances, and has an object to improve energy efficiency. [Means for solving the problem]

[0006] A shield device according to one embodiment of the present invention includes a shielding member that covers a power transmission cable connecting a charging port provided on a vehicle to which a charging plug is attached and a charger that charges a drive battery, and generates electricity from noise, and a supply device that supplies the electricity generated by the shielding member to an electricity supply destination. Effect of the Invention

[0007] According to the present invention, it is possible to improve energy efficiency. [Brief description of the drawings]

[0008] [Figure 1] 1 is a diagram showing an outline of the configuration of a vehicle according to an embodiment; [Diagram 2] FIG. 2 is a diagram illustrating a configuration of a power generation device. [Diagram 3] FIG. 2 is a diagram illustrating an example of the arrangement of power generating elements according to an embodiment. [Figure 4] 13 is a flowchart showing the flow of a supply process. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] <1. Vehicle Overview> Fig. 1 is a diagram showing an outline of the configuration of a vehicle 1 according to an embodiment of the present invention. Note that Fig. 1 shows only the configuration of the main parts of the vehicle 1 that are mainly related to the present invention.

[0010] The vehicle 1 of this embodiment is a plug-in electric vehicle or a plug-in hybrid vehicle that can be charged from an external source. As shown in Fig. 1, the vehicle 1 includes a motor 2, a drive battery 3, an inverter 4, a charging port 5, a charger 6, and a shield device 10 (see Fig. 3).

[0011] The motor 2 is a power source for propelling the vehicle 1, and is, for example, a three-phase AC motor. When power is supplied from a drive battery 3 via an inverter 4, the motor 2 generates driving force, and transmits the driving force to the drive wheels to propel the vehicle 1. If the vehicle 1 is a plug-in hybrid vehicle, it will also be equipped with an engine as a power source.

[0012] The motor 2 also generates electricity (power) by performing regenerative operation. The electricity generated by the regenerative operation of the motor 2 is supplied to the drive battery 3 via the inverter 4.

[0013] The drive battery 3 is a so-called high-voltage battery, and is capable of storing electricity to be supplied to the motor 2.

[0014] The inverter 4 converts the DC current supplied from the drive battery 3 into a three-phase AC current and supplies it to the motor 2. When the motor 2 performs regenerative operation, the inverter 4 converts the AC current supplied from the motor 2 into a DC current and supplies it to the drive battery 3.

[0015] The charging port 5 is provided on the vehicle 1 so that a charging plug can be connected thereto. The charging plug is connected to an external charging device. The charging device is, for example, a charging stand installed in a commercial facility, a parking lot, etc., and supplies AC current to the vehicle 1 via the charging plug.

[0016] The charger 6 is connected to the charging port 5 via a power transmission cable 7, and is also connected to the driving source battery 3 via a predetermined power transmission cable. The charger 6 is configured to include, for example, an AD / DC converter, and is equipped with a plurality of electronic components. The charger 6 converts AC current supplied from an external device via the charging port 5 into DC current, and supplies the converted DC current to the driving source battery 3, thereby charging the driving source battery 3.

[0017] Therefore, the drive battery 3 can be charged by regenerative operation using the motor 2 and by electricity supplied from an external device.

[0018] <2. Example of arrangement of shielding member 11> Fig. 2 is a diagram illustrating the configuration of the shield member 11. As shown in Fig. 2, the driving battery 3 is mounted in the lower part of a trunk room provided at the rear of the vehicle 1, or under the rear seat. The charger 6 is provided in the same case as the driving battery 3. The charger 6 does not have to be provided in the same case as the driving battery 3.

[0019] The power transmission cable 7 connects the charging port 5 and the charger 6. Specifically, the power transmission cable 7 is arranged from the charger 6 to the charging port 5 provided, for example, on the rear side of the vehicle 1, along the rear of the drive source battery 3 and the side of the trunk.

[0020] Here, in the charger 6, noise may be generated from various electronic components when AC current is converted to DC current. Furthermore, noise generated in the electronic components may be transmitted to the power transmission cable 7 as conducted noise. As a result, noise is generated from the power transmission cable 7 to the outside.

[0021] For this reason, the power transmission cable 7 is wrapped with a shielding member 11. In other words, the shielding member 11 is provided so as to cover the power transmission cable 7.

[0022] The shielding member 11 is made of, for example, a conductive metal material, and blocks noise generated from the power transmission cable 7 and external noise, and generates electricity from these noises, as will be described in detail later. In other words, the shielding member 11 generates electricity from noise. Note that the shielding member 11 does not have to be made of a metal material as long as it is a conductive material.

[0023] 3. Configuration of the shield device 10 3 is a diagram illustrating the configuration of the shield device 10. The shield device 10 includes a shield member 11, a supply device 12, a control device 13, and a power transmission cable 14.

[0024] The shield member 11 is connected to the power supply device 12 via a power transmission cable 14. In the shield device 10, electricity generated in the shield member 11 is transmitted to the power supply device 12 via the power transmission cable 14.

[0025] Here, a noise current flows to the shielding member 11 via a floating electrostatic capacitance expressed between the power transmission cable 7 and the shielding member 11 on the equivalent circuit. Then, the current flowing through the shielding member 11 is transmitted to the power supply device 12 via the power transmission cable 14.

[0026] In addition, in the shield device 10, an eddy current is generated on the shield member 11 due to a change in the magnetic flux density penetrating the shield member 11 caused by the magnetic field generated in the power transmission cable 7. The eddy current generated on the shield member 11 is then transmitted to the power supply device 12 via the power transmission cable 14.

[0027] In this way, it is possible for the shield member 11 to generate electricity from noise. Note that the shield member 11 may generate electricity by other methods as long as it is possible to generate electricity from noise.

[0028] The supply device 12 includes, for example, a DC / DC converter and a switching element. The supply device 12 converts the current transmitted from the shield member 11 into a direct current of a predetermined voltage and supplies it to various electricity supply destinations 15. Note that, when the electricity (current) generated by the shield member 11 is an alternating current, the supply device 12 may include an AC / DC converter.

[0029] The electricity supply destinations 15 are an auxiliary battery 15a and one or more electronic devices 15b mounted on the vehicle 1. The auxiliary battery 15a is a secondary battery, and is capable of supplying electricity to and charging the electronic devices 15b. The electronic devices 15b are lamps for illuminating the charging port 5, a charging indicator, interior lighting lamps, etc., and are turned on or operated by the supply of electricity.

[0030] The control device 13 is a processor including a central processing unit (CPU), a read only memory (ROM), and a random access memory (RAM). The control device 13 controls the entire shield device 10 by expanding a program stored in the ROM or a storage unit (not shown) on the RAM and executing the program.

[0031] Specifically, the control device 13 appropriately controls the supply device 12 to switch the electricity generated by the shield member 11 to one of the electricity supply destinations 15 and supply the electricity to the selected one of the electricity supply destinations 15 .

[0032] <4. Supply process flow> Fig. 4 is a flowchart showing the flow of the supply process. The supply process shown in Fig. 4 is executed by the control device 13 when the control device 13 determines that the current value from the shield member 11 to the supply device 12 is equal to or greater than a predetermined threshold value.

[0033] In step S1, the control device 13 determines whether the SOC (State Of Charge) of the auxiliary battery 15a is within a preset chargeable range. Here, the control device 13 determines whether the auxiliary battery 15a is chargeable depending on whether the SOC of the auxiliary battery 15a is within the chargeable range.

[0034] Then, when it is determined that the SOC of the auxiliary battery 15a is within the chargeable range and the auxiliary battery 15a is chargeable (Yes in step S1), in step S2 the control device 13 controls the supply device 12 to supply the electricity generated by the shield member 11 to the auxiliary battery 15a. As a result, the supply device 12 starts supplying the electricity generated by the shield member 11 to the auxiliary battery 15a, thereby starting charging the auxiliary battery 15a.

[0035] Then, in step S3, the control device 13 determines whether the SOC of the auxiliary battery 15a is equal to or higher than a preset threshold value. Here, the control device 13 determines whether the auxiliary battery 15a is sufficiently charged depending on whether the SOC of the auxiliary battery 15a is equal to or higher than the threshold value.

[0036] Then, the process of step S3 is repeated until the SOC of the auxiliary battery 15a becomes equal to or higher than the threshold value. On the other hand, if it is determined that the SOC of the auxiliary battery 15a becomes equal to or higher than the threshold value (Yes in step S3), in step S4, the control device 13 stops the supply of electricity generated by the shield member 11 to the auxiliary battery 15a, thereby ending the charging of the auxiliary battery 15a.

[0037] Furthermore, if it is determined that the SOC of the auxiliary battery 15a is not within the chargeable range, i.e., that the auxiliary battery 15a is already sufficiently charged (No in step S1), in step S5 the control device 13 determines whether the driving source battery 3 is being charged.

[0038] If it is determined that the driving source battery 3 is being charged (Yes in step S5), then in step S6 the control device 13 determines whether it is necessary to supply power to the electronic device 15b. Here, whether it is necessary to supply power to the electronic device 15b is determined based on, for example, whether it is the timing when the charging plug is inserted or removed from the charging port 5, whether the electronic device 15b is in operation, etc.

[0039] Then, when it is determined that power supply to the electronic device 15b is necessary (Yes in step S6), in step S7, the control device 13 controls the supply device 12 to supply electricity generated by the shield member 11 to the electronic device 15b that is determined to require power supply. As a result, the supply device 12 starts supplying electricity generated by the shield member 11 to the electronic device 15b that requires power supply. In other words, the supply device 12 starts supplying power to the electronic device 15b.

[0040] Then, in step S8, the control device 13 again determines whether it is necessary to feed power to the electronic device 15b. Then, the process of step S8 is repeated until it is no longer necessary to feed power to the electronic device 15b. On the other hand, if it is determined that it is no longer necessary to feed power to the electronic device 15b (No in step S8), in step S9, the control device 13 ends the feeding of the electricity generated by the shield member 11 to the electronic device 15b.

[0041] In addition, if it is determined that the driving battery 3 is not being charged (No in step S5) and if it is determined that power supply to the electronic devices 15b is not necessary (No in step S6), the control device 13 ends the processing without supplying electricity to any of the electronic devices 15b.

[0042] <5. Summary of the embodiment> As described above, the shield device 10 of the embodiment includes a shielding member 11 that covers the power transmission cable 7 connecting the charging port 5 provided on the vehicle 1 to which a charging plug is attached and the charger 6 that charges the drive source battery 3, and generates electricity using noise, and a supply device 12 that supplies the electricity generated by the shielding member 11 to an electricity supply destination 15.

[0043] This allows the shield device 10 to generate electricity from noise and supply the generated electricity to the electricity supply destination 15. In other words, the shield device 10 not only blocks noise, but also generates electricity from the blocked noise, thereby improving energy efficiency.

[0044] For example, when noise occurs in the power transmission cable 7 while the driving battery 3 is being charged, the shield device 10 can protect the driving battery 3 and the electronic device 15b by shielding the noise generated from the power transmission cable 7 with the shield member 11 and making it difficult for the noise to reach the driving battery 3 and the electronic device 15b. Also, the shield device 10 can generate electricity from the noise generated while the driving battery 3 is being charged, thereby recovering energy that was not previously used for charging as noise, thereby improving energy efficiency. Furthermore, the shield device 10 can reduce noise emitted to the outside by the amount of electricity generated by the shield member 11, thereby improving noise shielding efficiency.

[0045] Furthermore, when the vehicle 1 is traveling in a place where noise is generated, for example, when the vehicle 1 is traveling near a high-voltage power transmission line, the shield device 10 can block external noise with the shield member 11 and suppress the effect of the noise on the power transmission cable 7. Furthermore, the shield device 10 enables the shield member 11 to generate power using external noise.

[0046] Further, the shield device 10 is provided with a plurality of electricity supply destinations 15, and includes a control device 13 that controls to which of the plurality of electricity supply destinations 15 the electricity generated in the shield member 11 is to be supplied.

[0047] As a result, in the shield device 10, it becomes possible to supply electricity generated in the shield member 11 to any one of the multiple electricity supply destinations 15 depending on the status of the multiple electricity supply destinations 15, thereby making it possible to further improve energy efficiency.

[0048] In addition, in the shield device 10, the control device 13 controls the supply of electricity generated by the shield member 11 to the auxiliary battery 15a when the state of charge (SOC) of the auxiliary battery 15a that supplies electricity to the electronic device 15b is within a chargeable range.

[0049] As a result, when the auxiliary battery 15a is within the chargeable range, the auxiliary battery 15a is controlled to be actively charged, so that the SOC of the auxiliary battery 15a can be maintained at a high level.

[0050] In addition, in the shield device 10, when the charging rate of the auxiliary battery 15a is not within the chargeable range, and when the driving source battery 3 that supplies electricity to the motor 2 as the driving source is being charged, the control device 13 controls the supply of electricity generated in the shield member 11 to the electronic device 15b as the electricity supply destination 15.

[0051] Here, when the driving source battery 3 is being charged, it is considered that electricity is being stably supplied from an external charging device to the driving source battery 3. Therefore, the amount of electricity generated by the shielding member 11 is also considered to be stable. On the other hand, a stable supply of electricity is required for the electronic device 15b. Therefore, when the driving source battery 3 is being charged, electricity can be stably supplied to the electronic device 15b by supplying electricity generated by the shielding member 11.

[0052] Furthermore, if electronic device 15b is a lamp for illuminating charging port 5, it can be easily seen by the user when inserting and removing the charging plug from charging port 5, thereby improving usability.

[0053] <6. Variations> Although the embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned specific examples and can adopt various configurations. For example, the program for executing the above-mentioned supplying process can be stored in advance in a recording medium built into a device such as a computer device, or in a ROM or the like in a microcomputer having a CPU. [Explanation of symbols]

[0054] 1 vehicle 2 Motors 3. Power source battery 4 Inverter 5 Charging port 6 charger 7 Power Cables 10 Shielding Device 11 Shielding material 12 Feeding device 13 Control device 14 Power Cables 15 Electricity supply destination 15a Auxiliary battery 15b Electronic equipment

Claims

1. a shielding member that covers a power transmission cable connecting a charging port provided in a vehicle to which a charging plug is attached and a charger that charges the drive source battery, and that generates electricity using noise; A supply device that supplies the electricity generated by the shield member to an electricity supply destination; A shielding device comprising:

2. There are a plurality of electricity supply destinations, A control device is provided that controls to which of the plurality of electricity supply destinations the electricity generated by the shielding member is to be supplied. The shielding device of claim 1 .

3. The control device includes: When the charging rate of an auxiliary battery that supplies electricity to an electronic device is within a chargeable range, the electricity generated by the shield member is controlled to be supplied to the auxiliary battery. The shielding device of claim 2.

4. The control device includes: When the charging rate of the auxiliary battery is not within the chargeable range and a drive source battery that supplies electricity to a motor as a drive source is being charged, the electricity generated by the shield member is controlled to be supplied to an electronic device as the electricity supply destination. The shielding device of claim 3.

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