WO2024078564A1

WO2024078564A1 - Charging device heating structure and motor vehicle

Info

Publication number: WO2024078564A1
Application number: PCT/CN2023/124187
Authority: WO
Inventors: 王超
Original assignee: 长春捷翼汽车科技股份有限公司
Priority date: 2022-10-13
Filing date: 2023-10-12
Publication date: 2024-04-18
Also published as: CN115696656A

Abstract

The prevent application relates to the technical field of electronic lock design. Disclosed are a charging device heating structure and a motor vehicle. The charging device heating structure comprises a charging socket, an electronic lock and a heating device, the electronic lock is provided with a lock rod; the charging socket is provided with a lock hole allowing the lock rod to be inserted therein; and the heating device is arranged in the electronic lock or the charging socket, and is used for heating the lock rod or the lock hole. The heating device in the present application can heat the lock rod of the electronic lock and the lock hole of the charging socket, is particularly suitable for northern cold weather, and can effectively avoid the phenomenon of failure of an electronic lock of a charging device caused by cold weather. The present application provides various heating modes as choices, and can choose the heating modes according to different actual environments. A temperature sensor can measure the temperature of the lock rod or the lock hole, and when the temperature is lower than a preset value, the heating device is automatically started, so as to automatically complete the heating work.

Description

A charging device heating structure and a motor vehicle

Related Applications

This application claims priority to Chinese patent application No. 202211253234.8 filed on October 13, 2022, and cites the contents disclosed in the above patent application as part of this application.

Technical Field

The present application relates to the technical field of electronic lock design, and more specifically, to a charging device heating structure and a motor vehicle.

Background technique

New energy electric vehicles are the development trend of the automobile industry and are an emerging industry that is currently being strongly supported. In addition to batteries, the key technologies of electric vehicles also focus on AC/DC charging interfaces. AC/DC charging of electric vehicles requires completion under high current. In order to ensure the safety of end customers during use, an electronic lock is required on the charging socket in the power supply end. During the charging process, the electronic lock temporarily locks the charging gun and the charging interface on the charging socket, so that the charging gun and the charging interface maintain a relatively stable connection to ensure the safety of the charging process. However, in a severely cold working environment, the lock rod of the electronic lock or the lock hole of the electronic lock and the lock hole corresponding to the charging socket and the electronic lock are prone to frost and ice, which makes it impossible for the electronic lock to be locked normally, which is easy to cause danger during the charging process. Therefore, a new solution is urgently needed in the prior art to solve the above problems.

Summary of the invention

The purpose of the present application is to provide a charging device heating structure and a new technical solution for a motor vehicle to solve the problem of easy frost accumulation on the lock rod or lock hole of the electronic lock on the charging socket.

A charging device heating structure comprises a charging socket, an electronic lock and a heating device, wherein the electronic lock is provided with a locking rod, the charging socket is provided with a locking hole for inserting the locking rod, the heating device is arranged in the electronic lock or in the charging socket, and is used for heating the locking rod or the locking hole.

In some embodiments, a cavity for accommodating a locking rod is provided in the electronic lock, and a heating device is provided on the inner wall of the cavity or in the lock hole. When the locking rod is extended, it passes through the heating device, and a gap is provided between the locking rod and the heating device.

In some embodiments, a cylindrical structure concentric with the lock rod is disposed in the electronic lock, the lock rod is located in the cylindrical structure, and the heating device is disposed on the outer wall of the cylindrical structure.

In some embodiments, a sleeve is provided on the charging socket, a lock hole is provided in the sleeve, and a heating device is provided in the sleeve. on the outer wall.

In some embodiments, the heating device comprises a heating element, which is a semiconductor heater or a resistive heater or a conductive coil.

In some embodiments, the heating element is electrically connected to the vehicle battery.

In some embodiments, the conductive coil is a helical shape of a wire, and the pitch of the helical shape is 1 to 3 times the diameter of the wire.

In some embodiments, the spiral shape is arranged in multiple overlapping layers.

In some embodiments, a cylindrical body concentric with the lock hole is disposed in the charging socket, the lock rod is at least partially located in the cylindrical body, and the conductive coil surrounds the outer wall of the cylindrical body.

In some embodiments, the locking rod is made of a non-metallic material, and the cylindrical body is made of a conductor.

In some embodiments, the heating rate of the heating device is not less than 5°C/min.

The charging device heating structure provided in the present application also includes a control unit and a temperature sensor for measuring the temperature of the lock rod or the lock hole. The temperature sensor and the heating device are electrically connected to the control unit respectively.

The charging device heating structure provided in the present application also includes a lock rod position sensor, and the lock rod position sensor and the heating device are electrically connected to the control unit respectively.

A motor vehicle comprises the above charging device heating structure. The beneficial effects of the present application are:

1. The heating device in the present application can heat the electronic lock, especially the lock rod and lock hole of the electronic lock, which is particularly suitable for cold weather in the north and can effectively prevent the phenomenon of malfunction of the electronic lock of the charging device caused by cold weather.

2. The conductive coil in the present application will generate a magnetic field after being connected to alternating current. The lock rod arranged in the channel of the spiral conductive coil will generate an induced current under the action of the magnetic field. The induced current will cause the lock rod to heat up, thereby heating the lock rod and the lock hole.

3. This application provides a variety of heating methods as options, which can be selected according to different actual environments.

4. The temperature sensor in this application can detect the temperature of the lock rod or the lock hole. When the temperature is lower than the preset value, the heating device is automatically turned on, thereby automatically completing the heating work.

Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

FIG1 is a schematic diagram of a heating structure of a charging device according to the present application.

FIG. 2 is a schematic diagram of a heating device of a heating structure of a charging device of the present application.

FIG3 is a bottom cross-sectional view of a cylindrical structure of a heating structure of a charging device of the present application.

FIG. 4 is a side cross-sectional view of a heating structure sleeve of a charging device according to the present application.

FIG5 is a side cross-sectional view of a conductive coil of a heating structure of a charging device according to the present application.

FIG. 6 is a bottom cross-sectional view of a conductive coil of a heating structure of a charging device according to the present application.

FIG. 7 is a side cross-sectional view of a cylindrical body of a heating structure of a charging device of the present application.

The following are marked in the figure:
100-charging socket, 101-lock hole, 102-cylindrical body,
200-electronic lock, 201-lock rod, 202-actuator, 204-cylindrical structure,
300-Heating device,
3-conductive coil, 31-channel,
400-Casing.

Detailed ways

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

A charging device heating structure, as shown in Figure 1, includes a charging socket 100, an electronic lock 200 and a heating device 300, the electronic lock 200 has a locking rod 201, the charging socket 100 has a locking hole 101 for inserting the locking rod 201, the heating device 300 is arranged in the electronic lock 200 or in the charging socket 100, and the heating device 300 is used to heat the locking rod 201 or the locking hole 101.

To ensure the safety of customers during use, it is required to set an electronic lock 200 on the charging socket 100 in the power supply end. The electronic lock 200 temporarily locks the charging gun and the charging interface on the charging socket 100 during the charging process, so that the charging The electric gun maintains a relatively stable connection with the charging interface to ensure the safety of the charging process. The lock rod 201 can reciprocate at the lock hole 101 under the control of the actuator 202 of the electronic lock 200. The actuator 202 of the electronic lock 200 is the drive unit and transmission mechanism of the electronic lock 200. In one embodiment, the electronic lock 200 includes a drive motor and a gear worm transmission mechanism. When the lock rod 201 extends out of the lock hole, the electronic lock 200 is in a locked state; when the lock rod 201 is retracted into the lock hole 101, the electronic lock 200 is in an open state. The electronic lock 200 is used as an auxiliary device in the charging mechanism of new energy vehicles. Its volume is very small, and the lock hole is even smaller. In cold weather, it is easy to block the lock hole due to frost and ice, making the electronic lock 200 unusable. In a severe cold working environment, the lock rod 201 of the electronic lock 200 or the lock hole 101 of the charging socket 100 is prone to frost and ice, so that the electronic lock 200 cannot be locked normally, which is easy to cause danger during the charging process. The present application provides a heating device 300 for the electronic lock 200, which can provide heat when needed to prevent the electronic lock 200 from failing to work. The heating device 300 can be manually controlled, and only turned on when the weather is cold, or it can be automatically controlled, such as turning on when the temperature reaches a preset condition. The electronic lock 200 can be set inside the charging socket 100 or outside the charging socket 100. Correspondingly, the heating device 300 can be set inside the charging socket 100 or inside the electronic lock 200. As long as the heating device 300 can heat the lock rod 201 and the lock hole 101, they are all optional solutions.

In some embodiments, a cavity for accommodating the locking rod 201 is provided in the electronic lock 200, and the heating device 300 is provided on the inner wall of the cavity or in the lock hole 101. When the locking rod 201 is extended, it passes through (i.e., passes through) the heating device 300, and there is a gap between the locking rod 201 and the heating device 300. As shown in FIG2 , the heating device 300 can be provided in the electronic lock 200 or in the charging socket 100. As long as it can approach the locking rod 201 or the lock hole 101 and generate heat, it is a suitable setting position for the heating device 300 to prevent frost and ice from forming on the locking rod 201 or the lock hole 101. A certain gap is maintained between the locking rod 201 and the heating device 300 to prevent the locking rod 201 from scratching the heating device 300 during the extension and retraction process.

In some embodiments, a cylindrical structure 204 concentric with the lock rod 201 is provided in the electronic lock 200, the lock rod 201 is located in the cylindrical structure 204, and the heating device 300 is provided on the outer wall of the cylindrical structure 204. As shown in FIG3 , the cylindrical structure 204 is provided outside the lock rod 201, so that the lock rod 201 reciprocates in the cylindrical structure 204, and the inner wall of the cylindrical structure 204 provides a movement limit for the lock rod 201, so that the movement of the lock rod 201 is more stable, and the failure rate of the electronic lock 200 is reduced. The cylindrical structure 204 is provided in the electronic lock 200 and is concentric with the lock hole 101. The heating device 300 is outside the cylindrical structure 204, and further heats the lock rod 201 or the lock hole 101 by heating the cylindrical structure 204.

In some embodiments, a sleeve 400 is provided on the charging socket 100, the lock hole 101 is provided in the sleeve 400, and the heating device 300 is provided on the outer wall of the sleeve 400. As shown in FIG4 , the sleeve 400 is provided in the charging socket 100, so that the lock rod 201 can reciprocate in the sleeve 400 after being inserted into the charging socket 100, and the inner wall of the sleeve 400 provides a movement limit for the lock rod 201, so that the movement of the lock rod 201 in the charging socket 100 is more stable, further reducing the electronic lock 200. The sleeve 400 is disposed in the charging socket 100 and is concentric with the lock hole 101 . The heating device 300 is disposed outside the sleeve 400 to heat the lock rod 201 or the lock hole 101 through the sleeve 400 .

In some embodiments, the heating device 300 includes a heating element, which may be a semiconductor heater or a resistance heater or a conductive coil 3 .

The semiconductor heater is a cooling technology based on the Peltier effect. Its working principle is that when the N-type and P-type semiconductor elements are connected into a thermocouple and a direct current is passed through the two semiconductors, one end of the thermocouple will absorb heat and gradually become cold, and this semiconductor end is called the cold end; the other end will release heat and become hot, and is called the hot end. In this embodiment, even if the hot end is close to the electronic lock 200 and the DC power supply of the semiconductor is turned on, the heating device 300 can heat the electronic lock 200.

Resistance heating is the electrical heating of an object using the heat energy generated by the Joule effect of current flowing through a conductor. In this embodiment, an electric heating element, such as a resistance wire, a thermistor, an electric heating film, etc., is arranged near the electronic lock 200. When current passes through the electric heating element, the electric heating element first generates heat, and then the heat generated by the electric heating element is used to indirectly heat the electronic lock 200.

In some embodiments, the heating device 300 is a conductive coil 3; as shown in FIG5 and FIG6, the locking rod 201 is a conductor, and the conductive coil 3 is connected to an AC power source. After the conductive coil 3 of this embodiment is connected to the AC power, a magnetic field will be generated, and the locking rod 201 arranged in the conductive coil 3 will generate an induced current under the action of the magnetic field, and the induced current will cause the locking rod 201 to heat up, thereby achieving the purpose of heating the locking rod 201 and the lock hole 101. The conductive coil 3 in this embodiment can heat the locking rod 201 through the thermal eddy current effect, thereby improving the low temperature condition at the locking rod 201 and the lock hole 101.

The principle of the thermal eddy current effect is that when a conductor is in a changing magnetic field or moves relative to the magnetic field, an induced current will also be generated inside the conductor. The current streamlines of these induced currents in the conductor are in the shape of a closed vortex, which is called eddy current or eddy current. Induction heating uses this principle to place the heated metal in a high-frequency changing electromagnetic field. The strong electromagnetic field forms induced eddy currents on its surface, which rapidly heat up the material due to its internal resistance, releasing a large amount of Joule heat, thereby heating the surrounding space.

In some embodiments, the heating element is electrically connected to the vehicle battery. Among them, if the heating element is a semiconductor heater, it needs to be connected to direct current and can be directly connected to the vehicle battery point. If the heating element is a resistance heater, it can be connected to either AC or DC. If the conductive coil 3 heats the lock rod according to the thermal eddy current effect, the conductive coil 3 needs to be connected to the vehicle battery through an inverter. The inverter is a transformer that converts direct current to alternating current, which is actually a voltage inversion process with the converter. The converter converts the AC voltage of the power grid into a stable DC output, while the inverter can convert the 12V DC voltage output by the battery into high-frequency, high-voltage AC. When the electronic lock 200 is set in the charging socket 100, the vehicle battery can provide AC power to the conductive coil 3 through the inverter, so that the conductive coil 3 can be connected to the vehicle battery. A strong magnetic field is generated inside the electric coil 3, causing the locking rod 201 inside the conductive coil 3 to generate heat.

In some embodiments, the conductive coil 3 is a spiral wound with a wire, and the pitch of the spiral conductive coil 3 is 1 to 3 times the diameter of the wire. The spiral conductive coil 3 is connected to an AC power source and is wound around the lock rod 201, but does not contact the lock rod 201 and does not affect the normal movement of the lock rod 201. The conductive coil 3 is spiral, and the lock rod 201 of the electronic lock 200 is located in the channel 31 formed by the spiral. The heat generated by the conductive coil 3 is related to the magnitude of the current conducted in the conductive coil 3, the number of turns of the conductive coil 3, and the material and size of the conductor inside the conductive coil 3. The wire of the conductive coil 3 is spirally wound. When the conducting current is consistent and the spiral conductive coil 3 is a single-layer conductive coil, the smaller the pitch of the spiral conductive coil 3, the greater the heat generated by the conductive coil 3. In order to verify the influence of the pitch of the spiral conductive coil 3 being a multiple of the wire diameter of the conductive coil 3 on the heat generated by the conductive coil 3, the inventor conducted a series of experiments. The inventor selected the same electronic lock 200, the same wire diameter of the conductive coil 3, the same length of the spiral conductive coil 3, respectively wound into spiral conductive coils 3 with different pitches, conducted the same current, measured the temperature values of the same position of the conductive coil 3 before and after conduction, and took the difference as the absolute value, which is the temperature drift value of the conductive coil 3. In this embodiment, the temperature drift value is less than 30°C, which is unqualified. The experimental results are shown in Table 1.

Table 1: Effect of the pitch of the helical conductive coil 3 being a multiple of the wire diameter of the conductive coil 3 on the heat generation of the conductive coil 3

It can be seen from Table 1 above that when the pitch of the spiral conductive coil 3 is more than 3 times the diameter of the conductive coil 3, the number of conductive coils 3 wound within the same distance is small, so the heat generated by the conductive coil 3 is also small, and the temperature drift value of the conductive coil 3 is less than 30°C, which does not meet the required value. When the pitch of the spiral conductive coil 3 is 1 times the diameter of the conductive coil 3, that is, the conductive coil 3 is already in close contact with the conductive coil 3, the pitch cannot be smaller, and this is the maximum value of the heat generated by the conductive coil 3. Therefore, the inventor sets the pitch of the spiral conductive coil 3 to 1-3 times the diameter of the conductive coil 3.

In some embodiments, the spiral conductive coil 3 is arranged in multiple layers, that is, multiple layers of conductive coils 3 are arranged, and the multiple layers of conductive coils 3 are closely contacted in sequence. According to the above description, when the spiral shape of the conductive coil 3 is a single layer, if the conduction current is small and the spiral shape of the conductive coil 3 is tightly wound, but the temperature drift value of the conductive coil 3 is still unqualified, the conductive coil 3 is further wound, and the spiral conductive coil is wound around the outside of the first layer of the spiral conductive coil 3. The number of turns of the conductive coil 3 is increased. When the conduction current is constant, the more turns of the conductive coil 3, the higher the temperature drift value of the conductive coil 3. A cylindrical body 102 concentric with the lock hole 101 is arranged in the charging socket 100. As shown in FIG7 , the lock rod 201 is at least partially located in the cylindrical body 102, and the conductive coil 3 surrounds the outer wall of the cylindrical body 102. In many cases, when the electronic lock 200 is unlocked, the lock rod is not completely located in the electronic lock 200, but a part of it is in the charging seat, but does not extend out of the lock hole 101, and only extends out of the lock hole 101 when it needs to be locked. Therefore, the charging socket 100 can be heated, and the cylindrical body 102 is arranged in the charging socket 100, so that the lock rod 201 reciprocates in the cylindrical body 102, the cylindrical body 102 is concentric with the lock hole 101, the cylindrical body 102 is sleeved on the outside of the lock rod 201, and the conductive coil 3 is wound on the outer wall of the cylindrical body 102. When the conductive coil 3 is energized, the locking rod 201 and the cylindrical body 102 can simultaneously generate an eddy current effect in the magnetic field provided by the conductive coil 3, so as to obtain a better heating effect.

In some embodiments, the material of the locking rod 201 is a non-metallic material, and the material of the cylindrical body 102 is a conductor. In the above embodiments, the materials of the locking rod 201 and the cylindrical body 102 can both be conductors, and heat can be generated in the conductive coil 3 at the same time. However, in some embodiments, it is necessary to use a locking rod 201 of a light weight and high lightness non-metallic material to reduce the load of the drive unit and the transmission mechanism, and at the same time reduce the friction sound between the locking rod 201 and the cylindrical body 102, and reduce abnormal noise. The non-metallic material can be plastic, which is simple to shape, high in strength, and light in weight, and can meet the strength requirements of the locking rod 201. However, the locking rod 201 of non-metallic material will not generate heat in the conductive coil 3, so it is necessary to select the material of the cylindrical body 102 as a conductive material, and the conductive coil 3 is arranged around the outer wall of the cylindrical body 102, which can provide an electromagnetic field for heating the cylindrical body 102, and the heating effect can be achieved without heating the locking rod 201.

In some embodiments, the heating rate of the heating device 300 is not less than 5°C/min. If the heating speed of the heating device 300 is too slow, it will take a long time to unlock or lock the lock in actual use. In order to select a suitable heating rate of the heating device 300, the inventor conducted relevant tests. The test method is to place the same charging socket 100 at a temperature of -20°C and a humidity of 65% for 12 hours. After starting the heating device 300, the electronic lock 200 is qualified if it can start working within 2 minutes, otherwise it is unqualified. The results are shown in Table 2.

Table 2: Effect of the heating rate of the heating device on the operation of the electronic lock

As shown in Table 2, when the heating rate of the heating device 300 is less than 5°C/min, the electronic lock 200 on the charging socket 100 cannot work normally within 2 minutes and is unqualified. Therefore, in this embodiment, the inventor selects a heating rate of the heating device 300 of not less than 5°C/min.

In some embodiments, the charging device heating structure provided in the present application further includes a control unit and a temperature sensor for measuring the temperature of the locking rod 201 or the locking hole 101 , and the temperature sensor and the heating device 300 are electrically connected to the control unit, respectively.

The control unit can detect the temperature value of the electronic lock 200 through the temperature sensor. When the temperature value is lower than the predetermined value, the control unit controls the switch of the heating device 300 to turn on, so that the heating device 300 can perform heating work. In normal use, when the temperature is lower than the freezing point, the water vapor in the air will begin to freeze. As the low temperature continues, the amount of ice will gradually increase. When the amount of ice accumulates to a certain extent, the lock hole 101 will be closed by the frozen ice, or the lock rod 201 will freeze in the electronic lock 200 or the charging socket 100. At this time, it is difficult to drive the lock rod 201 to work by relying on the motor in the electronic lock 200, so it is necessary to start the heating device 300 for heating. For example, the preset value of the temperature can be set at 0°C in the control unit. When the charging socket 100 is working, the temperature of the lock rod 201 or the lock hole 101 is first collected by the temperature sensor. When the temperature collected by the temperature sensor is less than 0°C, the control unit starts the heating device 300. The working time of the heating device 300 can use the rated time, for example, the rated time is 2 minutes. After 2 minutes, the heating device 300 stops heating, or the temperature collected by the temperature sensor is used to determine whether to stop the heating device 300. If the temperature collected by the temperature sensor is always less than 0°C, the heating device 300 continues to heat until the temperature collected by the temperature sensor is greater than or equal to 0°C, and the control unit stops the heating work of the heating device 300. The temperature sensor is a PTC temperature sensor or an NTC temperature sensor. The advantages of using these two temperature sensors are small size and can measure gaps that other thermometers cannot measure; easy to use, the resistance value can be arbitrarily selected between 0.1 and 100 kΩ; easy to process into complex shapes, can be mass-produced, good stability, strong overload capacity, suitable for conversion joints, which require small size and stable performance.

Furthermore, the charging device heating structure provided in the present application also includes a lock rod position sensor, and the lock rod position sensor and the heating device 300 are electrically connected to the control unit respectively. In some cases, a lock rod position sensor can be used to detect the position of the lock rod, such as a Hall sensor to determine whether the lock rod 201 enters the working position through magnetic induction, or an infrared sensor to determine whether the lock rod 201 enters the working position. If the control unit determines that the lock rod 201 has not entered the working position, the control unit starts the heating device 300. In order to control the heating device 300 more accurately, the control unit determines the temperature collected by the temperature sensor. If the temperature is lower than the preset value, it first determines whether the lock rod 201 can enter the normal working position. If not, the heating device 300 is started for heating. If the lock rod 201 can enter the normal working position, there is no need to start the heating device 300.

The present application also provides a motor vehicle, comprising the above-mentioned charging device heating structure.

Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

A charging device heating structure, characterized in that it includes a charging socket, an electronic lock and a heating device, the electronic lock has a locking rod, the charging socket has a locking hole for inserting the locking rod, the heating device is arranged in the electronic lock or the charging socket, and the heating device is used to heat the locking rod or the locking hole.
According to a charging device heating structure according to claim 1, it is characterized in that: a cavity for accommodating the locking rod is provided in the electronic lock, the heating device is provided on the inner wall of the cavity or in the lock hole, the locking rod passes through the heating device when extended, and there is a gap between the locking rod and the heating device.
According to a charging device heating structure according to claim 1, it is characterized in that: a cylindrical structure concentric with the locking rod is provided in the electronic lock, the locking rod is located in the cylindrical structure, and the heating device is provided on the outer wall of the cylindrical structure.
The charging device heating structure according to claim 1 is characterized in that a sleeve is provided on the charging socket, the lock hole is provided in the sleeve, and the heating device is provided on the outer wall of the sleeve.
A charging device heating structure according to claim 1, characterized in that the heating device comprises a heating element, and the heating element is a semiconductor heater, a resistance heater or a conductive coil.
A charging device heating structure according to claim 5, characterized in that the heating element is electrically connected to the vehicle battery.
According to the heating structure of a charging device according to claim 5, it is characterized in that the conductive coil is a spiral conductive coil formed by winding a conductive wire, and the pitch of the spiral conductive coil is 1 to 3 times the diameter of the conductive wire.
The charging device heating structure according to claim 7 is characterized in that the spiral conductive coil is arranged in multiple layers and overlaps with each other.
According to a charging device heating structure according to claim 7, it is characterized in that: a cylindrical body concentric with the lock hole is provided in the charging socket, the locking rod is at least partially located in the cylindrical body, and the conductive coil surrounds the outer wall of the cylindrical body.
According to the heating structure of a charging device as described in claim 9, it is characterized in that the material of the locking rod is a non-metallic material, and the material of the cylindrical body is a conductor.
The charging device heating structure according to claim 1 is characterized in that the heating rate of the heating device is not less than 5°C/min.
A charging device heating structure according to claim 1 is characterized in that it also includes a control unit and a temperature sensor for measuring the temperature of the lock rod or the lock hole, and the temperature sensor and the heating device are electrically connected to the control unit respectively.
A charging device heating structure according to claim 12, characterized in that it also includes a lock rod position sensor, and the lock rod position sensor and the heating device are electrically connected to the control unit respectively.
A motor vehicle, characterized by comprising a charging device heating structure as described in any one of claims 1-13.