JP2023128259A - Heating apparatus - Google Patents

Abstract

To provide a heating apparatus which improves energy efficiency.SOLUTION: A heating apparatus 10 provided in a vehicle comprises: a shield member 11 which covers a power transmission cable 7 for connecting a charging inlet 5 to which a charging plug is attached with a charger 6 which charges a battery (drive battery 13); and a switch (relay 13) which is connected between the shield member and a body ground 16. A plurality of switches may be provided. The shield member is provided in the vicinity of the battery and may further comprise a control unit 15 which controls the switch on the basis of temperature of a cell provided in the battery.SELECTED DRAWING: Figure 3

Description

The present invention relates to the technical field of heating devices installed in vehicles.

As described in Patent Document 1, in a vehicle, a shield part is provided between a circuit part on which electronic components are mounted and a power storage element to shield noise generated from the circuit part and noise from the outside. What has been proposed has been proposed.

Japanese Patent Application Publication No. 2016-127748

Incidentally, in recent years, there has been a desire for greater energy efficiency. However, in the above-described vehicle, the shield portion only blocks noise, and it cannot be said that energy efficiency is achieved.

The present invention was made in view of the above circumstances, and an object of the present invention is to improve energy efficiency.

A heating device according to an embodiment of the present invention includes a shield member that covers a power transmission cable that connects a charging port to which a charging plug is attached and a charger that charges a battery, and a connection between the shield member and body ground. and a switch.

According to the present invention, energy efficiency can be improved.

1 is a diagram showing an outline of the configuration of a vehicle as an embodiment. It is a figure showing an example of arrangement of a drive battery, a heater, and a shield member. It is a diagram showing a block configuration of a heating device. It is a flow chart showing the flow of heat treatment. It is a flowchart which shows the flow of heat processing of other embodiments. It is a figure showing the block composition of the heating device of other embodiments.

<1. General configuration of vehicle>
FIG. 1 is a diagram showing an outline of the configuration of a vehicle 1 as an embodiment. In addition, in FIG. 1, only the structure of the principal part mainly based on this invention is extracted and shown from the structure of the vehicle 1.

The vehicle 1 of this embodiment is a plug-in electric vehicle or a plug-in hybrid vehicle that can be charged from the outside. As shown in FIG. 1, the vehicle 1 includes a motor 2, a driving battery 3, an inverter 4, a charging port 5, a charger 6, a power transmission cable 7, a heater 8, and an auxiliary battery 9. The vehicle 1 also includes a heating device 10 (see FIG. 3), which will be described later.

The motor 2 is a power source for driving the vehicle 1, and is, for example, a three-phase AC motor. The motor 2 generates driving force using electric power supplied from the driving battery 3 via the inverter 4, and causes the vehicle 1 to travel by transmitting the driving force to the driving wheels. Note that if the vehicle 1 is a plug-in hybrid vehicle, it will also include an engine as a power source.

Further, the motor 2 generates electricity (power) by performing regenerative operation. Electricity generated by the regenerative operation of the motor 2 is supplied to the drive battery 3 via the inverter 4.

The driving battery 3 is a so-called high-voltage battery, and can store electricity to be supplied to the motor 2.

The inverter 4 converts the direct current supplied from the drive battery 3 into three-phase alternating current, and supplies the three-phase alternating current to the motor 2. Further, when the motor 2 performs regenerative operation, the inverter 4 converts the alternating current supplied from the motor 2 into direct current and supplies the direct current to the drive battery 3.

The charging port 5 is provided in the vehicle 1 so that a charging plug can be attached 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 alternating current to the vehicle 1 via a charging plug.

The charger 6 is connected to the charging port 5 via a power transmission cable 7, and is also connected to the driving battery 3 via a predetermined power transmission cable. The charger 6 includes, for example, an AD/DC converter, and is equipped with a plurality of electronic components. The charger 6 converts an alternating current supplied from an external device through the charging port 5 into a direct current, and charges the driving battery 3 by supplying the converted direct current to the driving battery 3.

Therefore, the drive battery 3 can be charged by regenerative operation by the motor 2 and by electricity supply from an external device.

The heater 8 is provided near the drive battery 3 and heats the drive battery 3 by generating heat using electric power supplied from the auxiliary battery 9 . The temperature of the driving battery 3 heated by the heater 8 increases.

<2. Example of arrangement of drive battery 3, heater 8, and shield member 11>
FIG. 2 is a diagram showing an example of the arrangement of the driving battery 3, the heater 8, and the shield member 11. As shown in FIG. 2, the drive battery 3 is mounted at the bottom of a trunk provided at the rear of the vehicle 1 or below the rear seat. Further, the charger 6 is provided in the same case as the drive battery 3. Note that the charger 6 does not need to be provided in the same case as the drive battery 3.

A heater 8 is provided below the drive battery 3. That is, the driving battery 3 is mounted on the heater 8.

Power transmission cable 7 connects charging port 5 and charger 6. Specifically, the power transmission cable 7 is disposed so as to extend from the charger 6, for example, above the driving battery 3 in the longitudinal direction (the width direction of the vehicle 1).

Here, in the charger 6, noise may be generated from various electronic components when converting alternating current to direct current. Further, noise generated in electronic components may be transmitted to the power transmission cable 7 as conduction noise. This causes noise to be generated from the power transmission cable 7 to the outside.

Therefore, a shield member 11 is wound around the power transmission cable 7. In other words, the shield member 11 is provided to cover the power transmission cable 7.

The shield member 11 is made of, for example, a conductive metal material, and shields noise generated from the power transmission cable 7 and noise from the outside, and as will be described in detail later, protects against heat generated from these noises. The driving battery 3 is heated. Note that the shield member 11 is preferably made of iron, which has a higher electrical resistance than copper or aluminum, but may also be made of copper, aluminum, or the like. Furthermore, the shield member 11 does not need to be made of a metal material as long as it has conductivity.

Like the power transmission cable 7, the shield member 11 is arranged above the drive battery 3 along the longitudinal direction of the drive battery 3. Therefore, the driving battery 3 is mounted so as to be sandwiched between the heater 8 and the shield member 11, and the heater 8 is disposed on the opposite side of the shielding member 11 with the driving battery 3 interposed therebetween.

<3. Configuration of heating device 10>
FIG. 3 is a diagram illustrating the configuration of the heating device 10. The heating device 10 includes a heater 8, a shield member 11, a relay 13, a temperature sensor 14, and a control section 15, and heats the drive battery 3 during charging.

The driving battery 3 is charged by a chemical reaction caused by electricity supplied from the motor 2 or an external device. In the drive battery 3, the chemical reaction for charging is slowed down at low temperatures, so the charging efficiency decreases and the charging time becomes longer.

Therefore, the heating device 10 suppresses the charging time of the driving battery 3 from increasing by heating the driving battery 3 when the temperature is low during charging.

Shield member 11 is connected to body ground 16 via a plurality of relays 13. Relay 13 connects between shield member 11 and body ground 16. Although two relays 13 are provided in this embodiment, the number is not limited. That is, the number of relays 13 may be one, or three or more.

The relays 13 are connected, for example, to the vicinity of both ends of the shield member 11, respectively. In addition, when the two relays 13 are to be explained separately, they are referred to as a first relay 13a and a second relay 13b.

The relay 13 can be switched on (closed) to connect the shield member 11 and body earth 16 and off (open) to disconnect the shield member 11 and body earth 16 based on the control of the control unit 15. be.

In the heating 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 due to the magnetic field generated by the power transmission cable 7. When the relay 13 is on, the eddy current generated on the shield member 11 flows to the body ground 16. At this time, the shield member 11 generates heat as the generated eddy current flows to the body ground 16.
On the other hand, when the relay 13 is off, the eddy current generated on the shield member 11 does not flow to the body ground 16. Therefore, the shield member 11 does not easily generate heat when the relay 13 is off.

Furthermore, when one relay 13 is on and the other relay 13 is off, for example when the first relay 13a is on and the second relay 13b is off, both relays 13 are on. The impedance (resistance) at the shield member 11 becomes larger than in the case. Further, when one relay 13 is on and the other relay 13 is off, the impedance of the shield member 11 is smaller than when both relays 13 are off.

Therefore, in the heating device 10, the more relays 13 are turned on, the more the impedance in the shield member 11 decreases, and the more current flows from the shield member 11 to the body ground 16 (the current value becomes larger). Therefore, in the heating device 10, as the number of relays 13 that are on increases, the noise reduction effect increases and the amount of heat generated by the shield member 11 also increases.

The driving battery 3 is provided with a plurality of cells 12. The plurality of cells 12 are arranged along the longitudinal direction of the heater 8 and the shield member 11. Further, the plurality of cells 12 are stacked between the heater 8 and the shield member 11. In addition, below, the cell 12 closest to the heater 8 side may be referred to as the heater side cell 12a, and the cell 12 closest to the shield member 11 side may be referred to as the shield side cell 12b.

A temperature sensor 14 is attached to each cell 12. The temperature sensor 14 measures the temperature of each cell 12 and outputs the measurement results to the control unit 15.

The control unit 15 is a processor including a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The control unit 15 controls the entire heating device 10 by loading a program stored in a ROM or a storage unit (not shown) onto a RAM and executing it.

Control unit 15 is connected to heater 8 , relay 13 , and temperature sensor 14 . The control unit 15 preferably controls the drive battery 3 (cell 12) by controlling the heater 8 on and off and the relay 13 on and off based on the temperature of each cell 12 input from the temperature sensor 14. Heat.

<4. Heat treatment flow>
FIG. 4 is a flowchart showing the flow of the heat treatment. The heat treatment shown in FIG. 4 is performed when the driving battery 3 is charged.

When the heat treatment shown in FIG. 4 is started, in step S1, the control unit 15 selects the highest temperature among the temperatures of each cell 12 inputted from the temperature sensor 14 (temperature of the cell 12 with the highest temperature: hereinafter, all It is determined whether the cell maximum temperature) is equal to or higher than a preset threshold temperature T1. Note that the threshold temperature T1 is set to a temperature (for example, 0° C.) at which each cell 12 of the drive battery 3 is at a low temperature as a whole and it is necessary to heat all the cells 12.

Then, if the maximum temperature of all cells is lower than the threshold temperature T1 (No in step S1), that is, if it is necessary to heat all the cells 12 of the drive battery 3 as a whole, the control unit 15 in step S2 , turns on the heater 8, and turns on the first relay 13a and the second relay 13b.
As a result, the heater 8 generates heat, and since the two relays 13 are turned on, the shield member 11 generates maximum heat.
Therefore, in step S2, the drive battery 3 is heated to the maximum by the heater 8 and the shield member 11.

If the maximum temperature of all the cells is equal to or higher than the threshold temperature T1 (Yes in step S1), the control unit 15 determines in step S3 whether the highest temperature of all the cells is equal to or lower than the threshold temperature T2. Note that the threshold temperature T2 is set to a temperature (for example, 20° C.) at which each cell 12 of the drive battery 3 is at a high temperature as a whole and there is no need to heat all the cells 12.

Then, if the maximum temperature of all cells is higher than the threshold temperature T2 (No in step S3), that is, if it is not necessary to heat all the cells 12 of the drive battery 3, the control unit 15 controls the heater 8 in step S4. At the same time, the first relay 13a and the second relay 13b are turned off.
As a result, the heater 8 is stopped and no current flows through the shield member 11, so that the shield member 11 does not generate heat.
Therefore, in step S4, the driving battery 3 is not heated. However, the shield member 11 shields noise generated from the power transmission cable 7 and noise from the outside.

If the maximum temperature of all cells is equal to or lower than the threshold temperature T2 (Yes in step S3), in step S5, the control unit 15 changes the temperature of the heater-side cell 12a from the temperature of the shield-side cell 12b (hereinafter referred to as shield-side cell temperature). It is determined whether the value obtained by subtracting the temperature (hereinafter referred to as heater side cell temperature) is equal to or higher than the threshold temperature T3. Note that the threshold temperature T3 does not require heating the drive battery 3 as a whole, but the temperature difference (for example, 2 °C).

If the value obtained by subtracting the heater-side cell temperature from the shield-side cell temperature is equal to or higher than the threshold temperature T3 (Yes in step S5), that is, if it is necessary to heat the heater-side cell 12a, in step S6, the control unit 15: Heater 8 is turned on, and first relay 13a and second relay 13b are turned off. As a result, while the heater 8 generates heat, no current flows through the shield member 11, so the shield member 11 does not generate heat.
Therefore, in step S6, the heater side cell 12a can be mainly heated, and the temperature difference between the cells 12 can be reduced.

If the value obtained by subtracting the heater-side cell temperature from the shield-side cell temperature is lower than the threshold temperature T3 (No in step S5), in step S7, the control unit 15 sets the value obtained by subtracting the shield-side cell temperature from the heater-side cell temperature as the threshold value. It is determined whether the temperature is equal to or higher than T4. Note that the threshold temperature T4 is a temperature difference that does not require heating the drive battery 3 as a whole, but the shield side cell temperature is lower than the heater side cell temperature and it is necessary to actively heat the shield side cell 12b. (for example, 2°C).

If the value obtained by subtracting the shield-side cell temperature from the heater-side cell temperature is equal to or higher than the threshold temperature T4 (Yes in step S7), that is, if the shield-side cell 12b is to be actively heated, in step S8, the control unit 15: Heater 8 is turned off, and first relay 13a and second relay 13b are turned on. As a result, while the heater 8 is stopped, the two relays 13 are turned on, so that the impedance of the shield member 11 is reduced to the maximum and the amount of heat generated by the shield member 11 is maximized.
Therefore, in step S8, the shield side cells 12b can be actively heated, and the temperature difference between the cells 12 can be reduced.

Further, if the value obtained by subtracting the shield side cell temperature from the heater side cell temperature is lower than the threshold temperature T4 (No in step S7), that is, if it is not necessary to actively heat the shield side cell 12b, control is performed in step S9. The section 15 turns off the heater 8, turns on the first relay 13a, and turns off the second relay 13b. As a result, the heater 8 is stopped and one of the relays 13 is turned on, so that the amount of heat generated by the shield member 11 is lower than when both relays 13 are turned on.
Therefore, in step S8, the shield side cells 12b can be suitably heated, and the temperature difference between the cells 12 can be reduced.

<5. Modified example>
Although the embodiments according to the present invention have been described above, the present invention is not limited to the above-described specific examples and can take various configurations.
For example, a program for executing the heat treatment described above can be stored in advance in a recording medium built into equipment such as a computer device, or in a ROM in a microcomputer having a CPU.

Further, in the embodiment described above, the relay 13 is provided as a switch for switching on/off the shielding member 11 and the body ground 16. However, the switch may also be a manually switched switch, for example.

Further, in the above-described embodiment, the heating device 10 heats the drive battery 3 using the heater 8 and the shield member 11, but the drive battery 3 may be heated only using the shield member 11.

Furthermore, the heat treatment in the embodiment described above is merely an example, and the heat treatment may be other treatment in which the drive battery 3 is heated at least by the shield member 11.

For example, when there is only one relay 13 and no heater 8 is provided, the heating process may be performed according to the flowchart shown in FIG. In this case, in step S11, the control unit 15 determines whether the maximum temperature of all cells is equal to or higher than the threshold temperature T1. If the maximum temperature of all the cells is equal to or higher than the threshold temperature T1 (Yes in step S11), in step S12, the control unit 15 determines that the value obtained by subtracting the shield side cell temperature from the temperature of the cell 12 that is farthest from the shield member 11 is the threshold temperature. Determine whether it is T4 or higher.
If the value obtained by subtracting the shield-side cell temperature from the temperature of the cell 12 furthest away from the shield member 11 is lower than the threshold temperature T4 (No in step S12), the control unit 15 turns off the relay 13 in step S13. As a result, the drive battery 3 is no longer heated.
On the other hand, when the maximum temperature of all cells is lower than the threshold temperature T1 (No in step S11), and when the value obtained by subtracting the shield side cell temperature from the temperature of the cell 12 that is farthest from the shield member 11 is equal to or higher than the threshold temperature T4 (Yes in step S12), the control unit 15 turns on the relay 13 in step S14. Thereby, the driving battery 3 is heated by the shield member 11.

Further, in the above embodiment, the heating device 10 heats the drive battery 3 (cell 12) using the heater 8 and the shield member 11. However, the heating device 10 is not limited to the drive battery 3, and may heat any target component of the vehicle 1, such as the engine or transmission, for example.
For example, as shown in FIG. 6, in the heating device 10, the shield member 11 and the target component 100 are arranged in contact with the refrigerant flow path 101, respectively. A refrigerant is flowing through the refrigerant flow path 101 .
In the heating device 10, the refrigerant in the refrigerant flow path 101 is heated by controlling the ON/OFF state of the relay 13 to cause the shield member 11 to generate heat. Then, the target component 100 is heated by the heated refrigerant.

<6. Summary of embodiments>
As described above, the heating device 10 of the embodiment includes a shield member 11 that covers the power transmission cable 7 that connects the charging port 5 to which the charging plug is attached and the charger 6 that charges the battery (driving battery 3). A switch (relay 13) connected between the shield member 11 and body ground 16 is provided.

Thereby, the heating device 10 causes the shield member 11 to generate heat by the noise generated from the power transmission cable 7 and the eddy current generated in the shield member 11 due to external noise. Then, the heating device 10 can heat, for example, the drive battery 3 by the shield member 11 that generates heat.
Therefore, in the heating device 10, the noise generated from the power transmission cable 7 and the noise from the outside can be reduced by the shield member 11.
Moreover, the heating device 10 can improve energy efficiency by not using the heater 8 or by using it together when heating the drive battery 3 during charging.

Further, the heating device 10 is provided with a plurality of switches (relays 13).
Thereby, in the heating device 10, the impedance of the shield member 11 can be made variable, and the amount of heat generated by the shield member 11 can be adjusted.
Therefore, the heating device 10 can efficiently heat the driving battery 3.

The shield member 11 also includes a control unit 15 that is provided near the battery (driving battery 3) and controls a switch (relay 13) based on the temperature of a cell 12 provided in the battery (driving battery 3).
Thereby, the heating device 10 can efficiently heat the drive battery 3 by reducing the temperature difference between the cells 12 based on the temperature of each cell 12.

The heating device 10 also includes a heater 8 provided on the opposite side of the shield member 11 across the battery (driving battery 3), and the control unit 15 controls the heater 8 and the switch (relay) based on the temperature of the cell 12. 13).
Thereby, the heating device 10 can heat the driving battery 3 more efficiently from the heater 8 and the shield member 11 based on the temperature of each cell 12.

In addition, the battery (driving battery 3) has a plurality of cells 12 stacked between the heater 8 and the shield member 11, and the control unit 15 controls the cell 12 closest to the heater 8 among the plurality of cells 12. The heater 8 and the switch (relay 13) are controlled based on the temperature of the cell 12 closest to the shield member 11 among the plurality of cells 12.
Thereby, the heating device 10 can, for example, mainly heat the cell 12 closest to the heater 8 or the shield member The driving battery 3 can be heated more efficiently by mainly heating the cell 12 on the 11 side.

1 Vehicle 2 Motor 3 Battery module 4 Inverter 5 Charging port 6 Charger 7 Power transmission cable 8 Heater 10 Heating device 11 Shield member 12 Cell 13 Relay 14 Temperature sensor 15 Control section

Claims (5)

a shield member that covers a power transmission cable that connects a charging port to which a charging plug is attached and a charger that charges the battery;
a switch connected between the shield member and body ground;
A heating device comprising: The heating device according to claim 1, wherein a plurality of the switches are provided. The shield member is provided near the battery,
The heating device according to claim 1, further comprising a control unit that controls the switch based on the temperature of a cell provided in the battery. a heater provided on the opposite side of the shield member across the battery,
The heating device according to claim 3, wherein the control unit controls the heater and the switch based on the temperature of the cell. In the battery, a plurality of the cells are stacked between the heater and the shield member,
The control unit controls the heater and the switch based on the temperature of the cell closest to the heater among the plurality of cells and the temperature of the cell closest to the shield member among the plurality of cells. The heating device according to claim 4.

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