A charging pile and a charging method thereof

Abstract

The application provides a charging pile and a charging method thereof, the charging pile comprising a heat storage substrate, a magnetic heating device, one end of the magnetic heating device being capable of being attached to or separated from the heat storage substrate, and the other end being in communication with an external environment; the magnetic heating device comprising a magnetic field generator and at least one heating module; the heating module comprising a magnetic member and a heat conducting member, the magnetic member and the heat conducting member being sequentially arranged in a direction from the heat storage substrate to the external environment; the magnetic field generator being capable of providing a magnetic field to the magnetic member in an intermittent form, the magnetic member being capable of moving towards the heat storage substrate or away from the heat storage substrate, for conducting heat from the external environment to the heat storage substrate; the application enables heat to be "transported" from the external environment to the heat storage substrate step by step and successively, and can provide good heating effect for electrical components inside the charging pile, and no unnecessary vibration or noise is generated in the whole heat transfer process.

Description

Technical Field

[0001] This invention relates to the field of charging equipment technology, and in particular to a charging pile and its charging method. Background Technology

[0002] With the development of automotive technology, electric vehicles are gaining an increasingly larger share of the vehicle market. Currently, electric vehicles are powered by batteries that supply electricity to drive motors. These motors convert the electrical energy into mechanical energy, which is then used to drive the wheels and other components via a transmission or directly. Electric vehicles, powered by the electrical energy stored in their batteries, require charging at charging stations.

[0003] In northern my country, winter outdoor temperatures often reach -10°C or even lower. At this time, charging stations are prone to problems such as failing to start or low-temperature malfunctions during the charging process, which brings great inconvenience to the use of charging stations in low-temperature environments.

[0004] Therefore, existing technologies often use heaters, heat pumps, and other methods to heat the internal components of charging piles. While these methods provide some heating effect, they are often energy-intensive and noisy. For example, utility model patent application number 201720468058.8 discloses a low-temperature resistant electric vehicle charging pile. By installing a fan and heater at the bottom of the charging pile, the fan is controlled by a controller to rotate under low-temperature conditions. The fan blows air through the heater, heats it, and directs it upwards, thus enabling the normal operation of the heat storage substrate. However, this heating method requires a heater to provide a heat source and a fan to promote the flow of hot air, resulting in high energy consumption and noise. Summary of the Invention

[0005] In view of this, the present invention aims to propose a charging pile and its charging method to solve the problems of high energy consumption and high operating noise in the process of heating the internal components of the charging pile in the prior art.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] A charging pile includes a thermal storage substrate and a magnetic heating device. One end of the magnetic heating device can be attached to or separated from the thermal storage substrate, and the other end is connected to the external environment. The magnetic heating device includes a magnetic field generator and at least one heating module. The heating module includes a magnetizing element and a heat-conducting element, which are arranged sequentially along the direction from the thermal storage substrate to the external environment. The magnetic field generator can provide a magnetic field to the magnetizing element in an intermittent manner, and the magnetizing element can move towards or away from the thermal storage substrate to conduct heat from the external environment to the thermal storage substrate.

[0008] Furthermore, when the magnetized component moves to its maximum position away from the thermal storage substrate, the magnetic field generator stops providing a magnetic field to the magnetized component; when the magnetized component moves to its maximum position closer to the thermal storage substrate, the magnetic field generator provides a magnetic field to the magnetized component.

[0009] Furthermore, the side of the magnetized component facing the heat storage substrate is designated as the first bonding surface, and the side of the magnetized component away from the heat storage substrate is designated as the second bonding surface. When the magnetized component is moved to its maximum position away from the heat storage substrate, the second bonding surface of the magnetized component is bonded to the heat-conducting component closest to the second bonding surface. When the magnetized component is moved to its maximum position towards the heat storage substrate, the first bonding surface of the magnetized component is bonded to the heat storage substrate, or to the heat-conducting component closest to the first bonding surface.

[0010] Furthermore, the charging pile is equipped with electrical components, which are located and mounted on the side of the heat storage substrate away from the magnetic heating device.

[0011] Furthermore, the magnetic heating device includes a driver connected to a magnetized component for driving the magnetized component to move toward or away from the heat storage substrate.

[0012] Furthermore, the driver is provided with a drive rod, which is connected to the magnetized component closest to the thermal storage substrate, and a connecting rod is provided between any two adjacent magnetized components.

[0013] Furthermore, the magnetic heating device includes a heat-insulating shell, the magnetic heating device is disposed in the heat-insulating shell, the heat-conducting element is fixedly connected to the inner wall of the heat-insulating shell, the inner wall of the heat-insulating shell is provided with at least one sliding rail, one end of the sliding rail is connected to the heat-conducting element, and the other end extends toward the heat storage substrate, and the magnetized element can move along the sliding rail.

[0014] Furthermore, the charging pile includes an AC power supply, a charging gun, a first converter, and a second converter. The AC power supply is connected to the input terminal of the first converter via a charging cable assembly, and the output terminal of the first converter is connected to the charging gun. The AC power supply is connected to the input terminal of the second converter via a heating cable assembly, and the output terminal of the second converter is connected to a magnetic field generator. The charging cable assembly is equipped with a first switch, and the heating cable assembly is equipped with a second switch.

[0015] Furthermore, the output of the second converter is connected to the magnetic field generator via a third line, and the output of the second converter is connected to the driver via a fourth line, wherein the third line is equipped with a third switch.

[0016] A charging method for a charging pile, applied to the charging pile, the charging method includes: S1, acquiring a charging start signal; S2, real-time detection of the temperature T1 of the internal electrical components of the charging pile; S3, determining whether T1 is greater than a first preset value K1; if yes, closing the first switch to start charging; if no, proceeding to step S4; S4, closing the second and third switches, the driver drives the magnetized component to move towards the heat storage substrate to the maximum position, the magnetic field generator provides a magnetic field to the magnetized component, and timing the closing duration P1 of the third switch; S5. Determine if P1 is greater than the first duration Q1; if yes, reset P1 to zero and proceed to step S6; if no, maintain the current state and re-execute step S5; S6. The driver drives the magnetized component to move away from the heat storage substrate to the maximum position, while simultaneously disconnecting the third switch. The magnetic field generator stops providing a magnetic field to the magnetized component, and the disconnection duration P2 of the third switch is timed; S7. Determine if P2 is greater than the second duration Q2; if yes, reset P2 to zero and return to step S2; if no, maintain the current state and re-execute step S7.

[0017] Compared with existing technologies, the charging pile and charging method of the present invention have the following advantages:

[0018] The charging pile and its charging method described in this invention enable heat to be "transported" from the external environment to the heat storage substrate step by step, thereby heating the heat storage substrate and providing a good heating effect for the electrical components inside the charging pile. Moreover, during the entire heat transfer process, only the magnetically attached component moves back and forth intermittently and the magnetic field generator provides the magnetic field intermittently, without generating unnecessary vibration or noise. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 This is a simplified structural diagram of a charging pile according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a heat storage substrate and a magnetic heating device for a charging pile according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the first operating state of the magnetic heating device according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the second operating state of the magnetic heating device according to an embodiment of the present invention;

[0024] Figure 5This is another structural schematic diagram of the magnetic heating device described in an embodiment of the present invention;

[0025] Figure 6 This is a circuit diagram of a charging pile according to an embodiment of the present invention;

[0026] Figure 7 This is another circuit diagram of a charging pile according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Magnetized component; 11. First bonding surface; 12. Second bonding surface; 2. Heat-conducting component; 3. Magnetic field generator; 4. Driver; 41. Drive rod; 42. Connecting rod; 5. Heat storage substrate; 6. Charging cable assembly; 61. First switch; 7. Heating cable assembly; 71. Second switch; 8. Third circuit; 81. Third switch; 9. Fourth circuit. Detailed Implementation

[0029] The inventive concepts of this disclosure will be described below using terminology commonly used by those skilled in the art to communicate the essence of their work to others skilled in the art. However, these inventive concepts may be embodied in many different forms and should not be construed as limited to the embodiments described herein.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] To address the issues of high energy consumption and excessive operating noise during the heating process of internal components in existing charging pile technologies, this embodiment proposes a charging pile, as shown in the attached figure. Figure 1-7 As shown, the charging pile includes a thermal storage substrate 5 and a magnetic heating device. One end of the magnetic heating device can be attached to or separated from the thermal storage substrate 5, and the other end is connected to the external environment. The magnetic heating device includes a magnetic field generator 3 and at least one heating module. The heating module includes a magnetized component 1 and a heat-conducting component 2 with a fixed position. The magnetized component 1 and the heat-conducting component 2 are arranged sequentially along the direction from the thermal storage substrate 5 to the external environment. The magnetic field generator 3 can provide a magnetic field to the magnetized component 1 in an intermittent manner. The magnetized component 1 can move towards or away from the thermal storage substrate 5 to conduct heat from the external environment to the thermal storage substrate 5.

[0033] The magnetized component 1 described in this application is made of magnetic material. Utilizing the property that magnetic materials heat up when magnetized under the influence of a magnetic field and cool down when demagnetized, for the heating module closest to the heat storage substrate 5, the magnetized component 1 is moved to its maximum position (fitting against the heat storage substrate 5) towards the heat storage substrate 5. Simultaneously, the magnetic field generator 3 provides a magnetic field to the magnetized component 1, transferring heat to the heat storage substrate 5 while being magnetized. After magnetization, the magnetized component 1 is moved to its maximum position (fitting against the heat-conducting component 2) away from the heat storage substrate 5. At the same time, the magnetic field generator 3 stops providing a magnetic field to the magnetized component 1. The magnetized component 1 cools down during demagnetization and can absorb heat from the fitted heat-conducting component 2 (or, the magnetized component 1 transfers its cooling energy to the heat-conducting component 2). Then, the demagnetized component 1 moves back towards the heat storage substrate 5 to fit against it, and the magnetic field generator 3 provides a magnetic field to the magnetized component 1, repeating the cycle.

[0034] Regarding the heat-conducting component 2 that receives cold energy as mentioned above, if only one heating module is set up, the heat-conducting component 2 can directly transfer the cold energy to the external environment. If two or more heating modules are set up, the cold energy carried by the heat-conducting component 2 itself can be transferred to the magnetized component 1 in the "magnetized heat dissipation state" in the adjacent heating module, so that the cold energy is transferred along the direction from the heat storage substrate 5 to the external environment. Conversely, it can also be said that the heat is transferred along the direction from the external environment to the heat storage substrate 5, thereby heating the heat storage substrate 5.

[0035] This process allows heat to be gradually and sequentially "transported" from the external environment to the heat storage substrate 5, thereby heating the heat storage substrate 5 and providing a good heating effect for the electrical components inside the charging pile. Moreover, during the entire heat transfer process, only the magnetized component 1 moves back and forth intermittently and the magnetic field generator 3 provides the magnetic field intermittently, without generating unnecessary vibration or noise.

[0036] Correspondingly, the heat storage substrate 5 can be an integrated assembly plate. The internal electrical components of the charging pile can be set and assembled on the side of the heat storage substrate 5 away from the magnetic heating device, and the temperature of the internal electrical components of the charging pile can be maintained by the heated heat storage substrate 5. For the heat conduction component 2 closest to the external environment, fins can be provided, and the fins are set on the side of the heat conduction component 2 facing the external environment to improve the heat exchange efficiency between the magnetic heating device and the external environment.

[0037] When only one heating module is set up, the magnetic field generator 3 provides a magnetic field to the magnetic field 1 when the magnetic receiving component 1 and the heat storage substrate 5 are in a bonded state; when the magnetic receiving component 1 and the heat conducting component 2 are in a bonded state, the magnetic field generator 3 stops providing a magnetic field to the magnetic receiving component 1.

[0038] Along the direction from the heat storage substrate 5 to the external environment, the magnetic heating device includes at least two heating modules arranged sequentially. Accordingly, each magnetized element 1 in the heating module can correspond to a magnetic field generator 3, which can provide an intermittent magnetic field to each magnetized element 1 individually; the magnetic heating device can also be equipped with only one magnetic field generator 3, which can provide an intermittent magnetic field to all magnetized elements 1 at the same time.

[0039] Overall, when the magnetized component 1 moves to its maximum position away from the thermal storage substrate 5, the magnetic field generator 3 stops providing a magnetic field to the magnetized component 1; when the magnetized component 1 moves to its maximum position closer to the thermal storage substrate 5, the magnetic field generator 3 provides a magnetic field to the magnetized component 1.

[0040] The side of the magnetized component 1 facing the heat storage substrate 5 is designated as the first bonding surface 11, and the side of the magnetized component 1 away from the heat storage substrate 5 is designated as the second bonding surface 12. When the magnetized component 1 is moved to its maximum position away from the heat storage substrate 5, the second bonding surface 12 of the magnetized component 1 is bonded to the heat-conducting component 2 closest to the second bonding surface 12. When the magnetized component 1 is moved to its maximum position closer to the heat storage substrate 5, the first bonding surface 11 of the magnetized component 1 is bonded to the heat storage substrate 5, or to the heat-conducting component 2 closest to the first bonding surface 11. Correspondingly, only one magnetized component 1 is bonded to the heat storage substrate 5, namely the magnetized component 1 in the heating module closest to the heat storage substrate 5, and the remaining magnetized components 1 are bonded to the heat-conducting component 2 closest to their first bonding surface 11.

[0041] The magnetic field generator 3 is a conventional electromagnet in the prior art, which generates a magnetic field when energized and stops generating the magnetic field when de-energized. The magnetized component 1 includes gadolinium or a gadolinium compound that has a magnetocaloric effect. The heat-conducting component 2 is a conventional ceramic with relatively good thermal conductivity.

[0042] The magnetic heating device includes a driver 4 connected to a magnetized component 1, used to drive the magnetized component 1 to move towards or away from the heat storage substrate 5. Each magnetized component 1 can correspond to a separate driver 4, allowing individual movement of each component 1; alternatively, all magnetized components 1 can be driven by a single driver 4. The driver 4 can be a conventional motor capable of driving linear motion, an electric telescopic rod mechanism, or a hydraulic telescopic rod mechanism.

[0043] Preferably, the driver 4 is provided with a drive rod 41, which is connected to the magnetizing element 1 closest to the heat storage substrate 5, and a connecting rod 42 is provided between any two adjacent magnetizing elements 1 (attached). Figure 5(Illustrated in red in the image), thus requiring only one driver to enable synchronous movement of all magnetized components 1. Between any two adjacent magnetized components 1, one end of the connecting rod 42 is connected to the second contact surface 12 of the magnetized component 1 relatively close to the heat storage substrate 5, and the other end passes through the heat-conducting component 2 between the two magnetized components 1 and is connected to the first contact surface 11 of the magnetized component 1 relatively far from the heat storage substrate 5. Correspondingly, the heat-conducting component 2 located between the two magnetized components 1 is provided with clearance holes to avoid spatial interference with the connecting rod 42, while also ensuring the normal movement of the magnetized components 1.

[0044] The magnetic heating device includes a heat-insulating shell (not shown), which is disposed within the heat-insulating shell. The heat-conducting element 2 is fixedly connected to the inner wall of the heat-insulating shell. At least one sliding rail is provided on the inner wall of the heat-insulating shell. One end of the sliding rail is connected to the heat-conducting element 2, and the other end extends towards the heat storage substrate 5. The magnetized element 1 can move along the sliding rail. This allows heat to be gradually transferred from the external environment to the heat storage substrate 5, preventing heat from dissipating to the surroundings of the magnetic heating device. Furthermore, it enables the magnetized element 1 to move smoothly back and forth within the heat-insulating shell, effectively preventing noise or vibration during operation.

[0045] Specifically, for the sliding rail provided between the heat storage substrate 5 and the heat conduction component 2 closest to the heat storage substrate 5, one end of the sliding rail is connected to the heat conduction component 2, and the other end extends toward the heat storage substrate 5. It can be connected to the heat storage substrate 5 or it can not be in contact with the heat storage substrate 5. For the sliding rail provided between any two adjacent heat conduction components 2, one end of the sliding rail is connected to one heat conduction component 2, and the other end is connected to the other heat conduction component 2.

[0046] The charging pile includes a central controller and a temperature sensor. The central controller is connected to the temperature sensor to obtain the temperature T1 of the internal electrical components of the charging pile in real time. It is recommended that these electrical components be mounted on the heat storage substrate 5. These components can be the charging module, control motherboard, etc., of the charging pile. The charging pile can also be equipped with an ambient temperature sensor to obtain the external ambient temperature T2 in real time.

[0047] Furthermore, the charging pile includes an AC power supply, a charging gun, a first converter, and a second converter. The AC power supply is connected to the input terminal of the first converter via a charging cable assembly 6, and the output terminal of the first converter is connected to the charging gun. The AC power supply is connected to the input terminal of the second converter via a heating cable assembly 7, and the output terminal of the second converter is connected to the magnetic field generator 3. Therefore, in addition to modifying a conventional charging pile by adding a magnetic heating device, this application can also modify the charging circuit of a conventional charging pile. While maintaining the existing charging circuit structure, an additional heating cable assembly 7 connected in parallel with the first converter and a second converter are added. Without affecting normal charging, the charging pile itself provides power to the intermittent operation of the magnetic field generator 3. The first and second converters are both conventional AC-DC converters, receiving AC power at their input terminals and outputting DC power of a specific specification at their output terminals. The central controller can be connected to the charging gun to determine whether the charging gun is connected to the electric vehicle.

[0048] Preferably, the charging cable group 6 is equipped with a first switch 61, and the heating cable group 7 is equipped with a second switch 71. Thus, by intermittently opening and closing the second switch 71, the magnetic field generator 3 can be operated intermittently without affecting the charging pile's charging of electric vehicles through the charging cable group 6.

[0049] Furthermore, the output of the second converter is connected to the magnetic field generator 3 via a third line 8, and the output of the second converter is connected to the driver 4 via a fourth line 9. A third switch 81 is installed on the third line 8. This allows for intermittent operation of the magnetic field generator 3 and intermittent movement of the magnetized component 1 without interfering with the charging of the charging pile. The central controller is connected to the first switch 61, the second switch 71, and the third switch 81 to control the opening and closing of the corresponding switches.

[0050] Based on this, this application further proposes a charging method for a charging pile, including:

[0051] S1. Obtain the charging start signal;

[0052] The charging signal can be activated by the user pressing the charging start button or clicking to start charging on the smart terminal's app. Preferably, step S1 includes: obtaining the charging start signal and determining whether the charging gun is properly connected to the electric vehicle; if yes, proceed to step S2; if no, indicate that the charging gun connection is abnormal.

[0053] S2, Real-time monitoring of the temperature T1 of the internal electrical components of the charging pile;

[0054] S3. Determine whether T1 is greater than the first preset value K1; if yes, close the first switch 61 to start charging; if no, proceed to step S4.

[0055] Since the cold resistance and safety requirements of charging piles and their electrical components vary with different specifications, K1 in this application is a preset temperature value. This application does not make specific limitations, but only uses a few individual numbers as examples, such as K1 being around 5℃.

[0056] Correspondingly, when T1 > K1, T1 meets the normal operating temperature of the electrical components inside the charging pile. Regardless of whether the magnetic heating device is in operation, the magnetic heating device is kept or adjusted to a shutdown state, and the second switch 71 and the third switch 81 are both disconnected.

[0057] S4. Close the second switch 71 and the third switch 81. The driver 4 drives the magnetized component 1 to move towards the heat storage substrate 5 to the maximum position. The magnetic field generator 3 provides a magnetic field to the magnetized component 1 and times the closing time P1 of the third switch 81.

[0058] In step S4, the magnetized component 1 is attached to the heat storage substrate 5 or the heat-conducting component 2. At the same time, the magnetic field generator 3 provides a magnetic field to the magnetized component 1. While being magnetized, the magnetized component 1 transfers heat to the heat storage substrate 5 or the heat-conducting component 2.

[0059] S5. Determine whether P1 is greater than the first duration Q1; if yes, set P1 to zero and proceed to step S6; if no, maintain the current state and re-execute step S5.

[0060] S6, the driver 4 drives the magnetized component 1 to move away from the heat storage substrate 5 to the maximum position, and at the same time disconnects the third switch 81. The magnetic field generator 3 stops providing the magnetic field to the magnetized component 1 and counts the disconnection time P2 of the third switch 81.

[0061] S7. Determine if P2 is greater than the second duration Q2; if yes, set P2 to zero and return to step S2; if no, maintain the current state and re-execute step S7.

[0062] The first duration Q1 and the second duration Q2 are preset time data, which are affected by multiple factors such as the thermal conductivity of different materials, component size and specifications, and bonding surface area. This application does not specify the specific data, but only uses individual figures as examples, such as Q1 being about 4 minutes and Q2 being about 5 minutes.

[0063] Correspondingly, steps S1-S7 can be regarded as the process of starting charging at the charging station.

[0064] Therefore, this application, through the charging method described above, first detects and analyzes the temperature T1 of the electrical components inside the charging pile when the user starts charging. If T1 is low, it can automatically adjust the intermittent operation of the magnetic field generator 3 and the intermittent movement of the magnetized component 1 to heat the heat storage substrate 5, causing the electrical components inside the charging pile to heat up until T1 meets the normal operating temperature of the electrical components inside the charging pile, and then starts charging. This can improve the intelligence and automation of the charging pile in the charging start-up process and avoid abnormal low-temperature start-up of the charging pile and low-temperature failure of electrical components.

[0065] To further enhance the intelligence of the charging pile during the charging start-up process, this application further improves step S3. Specifically, step S3 includes:

[0066] S31. Real-time detection of external ambient temperature T2;

[0067] S32. Determine whether T1 is greater than the first preset value K1, or whether T2 is greater than the second preset value K2; if yes, close the first switch 61 to charge; if no, proceed to step S4.

[0068] That is, this application separately detects and analyzes T1 and T2, and uses two-level judgment conditions to activate the magnetic heating device to heat the heat storage substrate 5 only when T1≤K1 and T2≤K2. This avoids activating the magnetic heating device when the ambient temperature is still relatively suitable, which would unnecessarily delay the charging start-up and effectively prevent frequent start-stop of the magnetic heating device. K1 is the same as above, and K2 is also a preset temperature value. This application does not make specific limitations, but only uses a few numbers as examples, such as K2 being around 0℃.

[0069] Furthermore, even after charging is started, the ambient temperature in northern regions often varies in winter, and in some extremely cold weather, electrical components may experience a temperature drop, making it difficult for the charging station to maintain a relatively stable and suitable temperature range during operation.

[0070] Therefore, this application further proposes a charging method for the charging process after charging is initiated, namely, the charging method includes the following during the charging process at the charging station:

[0071] B1. Real-time monitoring of the temperature T1 of the internal electrical components of the charging pile, the external ambient temperature T2, and the temperature T3 of the heat storage substrate 5;

[0072] The temperature T3 of the thermal storage substrate 5 can be obtained by setting a corresponding temperature sensor, which will not be elaborated further.

[0073] B2. Determine if T2 > K2; if yes, maintain the normal operation of the charging pile and return to step B1; if no, proceed to step B3.

[0074] During normal operation of the charging pile, the magnetic heating device is in a stopped state, and correspondingly, the second switch 71 and the third switch 81 are both in the open state. K2 is the same as before and will not be described again.

[0075] B3. Determine whether T2 is greater than the third preset value K3; if yes, proceed to step B4; if no, proceed to step B6.

[0076] Wherein, K3 < K2, and K3 is a preset temperature value. This application does not make specific limitations, but only uses a few numbers as examples, such as K3 being around -10℃.

[0077] B4. Determine if T1 > K1; if yes, maintain the normal operation of the charging pile and return to step B1; if no, proceed to step B5.

[0078] K1 is the same as mentioned above and will not be repeated here.

[0079] B5. Determine whether the sum of T3 and T2 is greater than T1; if yes, maintain the normal operation of the charging pile and return to step B1; if no, proceed to step B7.

[0080] B6. Determine whether the temperature change value of T1 within a unit time is less than the fourth preset value K4; if yes, proceed to step B7; if no, maintain the normal operation of the charging pile and return to step B1.

[0081] The temperature change value is the difference between the current temperature and the temperature at the previous unit time point, which conforms to the conventional mathematical meaning of change value and will not be elaborated further. Correspondingly, K4 is the temperature change value per unit time. In this application, both the unit time and K4 are preset values. This application does not make specific limitations, but only uses a few numbers as examples, such as: the unit time is 10s and K4 is 0℃.

[0082] B7. Close the second switch 71 and the third switch 81. The driver 4 drives the magnetized component 1 to move towards the heat storage substrate 5 to the maximum position. The magnetic field generator 3 provides a magnetic field to the magnetized component 1 and times the closing time P1 of the third switch 81.

[0083] B8. Determine if P1 is greater than the first duration Q1; if yes, set P1 to zero and proceed to step B9; if no, maintain the current state and re-execute step B8.

[0084] B9. The driver 4 drives the magnetized component 1 to move away from the heat storage substrate 5 to the maximum position, and at the same time disconnects the third switch 81. The magnetic field generator 3 stops providing the magnetic field to the magnetized component 1 and counts the disconnection time P2 of the third switch 81.

[0085] B10. Determine if P2 is greater than the second duration Q2; if yes, set P2 to zero and return to step B1; if no, maintain the current state and re-execute step B10.

[0086] Therefore, this application performs real-time detection and analysis of T1, T2, and T3 after charging begins; when T2 > K2, it indicates that the ambient temperature can meet the minimum temperature requirements for normal operation of the charging pile, and there is no need to start the magnetic heating device.

[0087] When T2≤K3, it indicates that the ambient temperature is very low, and the internal temperature of the charging pile can easily drop, affecting the normal operation of the charging pile. Accordingly, this application detects and analyzes the temperature change of T1 within a unit of time in a timely manner. Once T1 begins to show a downward trend, the magnetic heating device is immediately activated to preheat in advance. In extremely cold weather, timely and effective "preventive" heating can be carried out to avoid the charging pile from dropping to a certain fixed temperature value before heating is activated, thus eliminating the lag in heating action.

[0088] When K3 < T2 ≤ K2, it indicates that the ambient temperature is relatively low, which may cause a drop in the internal temperature of the charging pile. Accordingly, this application first performs a first-level analysis on whether T1 is greater than K1. When T1 > K1, it indicates that although the ambient temperature is low, the electrical components inside the charging pile can maintain a good operating temperature and corresponding temperature balance, and there is no need to start the magnetic heating device. If T1 ≤ K1, a second-level analysis is further performed on whether T3 + T2 is greater than T1. Using the external ambient temperature T2 as temperature compensation, the temperature difference between the heat storage substrate 5 and the electrical components installed on the heat storage substrate 5 is analyzed. When T3 + T2 > T1, it indicates that the heat storage substrate 5 is lower than K1. The plate 5 still has the ability to heat and keep the electrical components warm, so the magnetic heating device can be temporarily not turned on to minimize unnecessary energy consumption. When T3+T2≤T1, it indicates that the heat storage plate 5's ability to heat and keep the electrical components warm is insufficient, and the magnetic heating device needs to be turned on in time to avoid T1 gradually decreasing due to the heat storage plate 5 losing its heating capacity at lower ambient temperatures. Thus, by proposing a charging method during the charging process, this application enables the charging pile to effectively and timely regulate the heating of the internal electrical components when charging in cold weather, improving the intelligence and automation of the charging pile's operation, and also improving the accuracy of the charging pile's heating regulation of the internal electrical components.

[0089] Steps B7-B10 involve the magnetic heating device performing a "heat transfer" process, which is the same as steps S4-S7 mentioned above and will not be described again.

[0090] In this invention, any charging pile may include the technical solutions related to the charging pile described in this embodiment; based on the technical solutions provided in this application, the charging pile also includes conventional components of the charging pile, such as a shell, a communication module or a human-computer interaction module. Since these conventional components can all refer to the prior art, they will not be described in detail here.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A charging pile, characterized in that, The charging pile comprises a heat storage base plate (5), a magnetic heating device, one end of which can be attached to or separated from the heat storage base plate (5), and the other end of which is in communication with the external environment; the magnetic heating device comprises a magnetic field generator (3) and at least one heating module; the heating module comprises a magnetic piece (1) and a heat conducting piece (2), which are arranged in sequence in the direction from the heat storage base plate (5) to the external environment; the magnetic field generator (3) can provide a magnetic field to the magnetic piece (1) in an intermittent form, and the magnetic piece (1) can move towards the direction of approaching or moving away from the heat storage base plate (5) for conducting heat from the external environment to the heat storage base plate (5); the magnetic heating device further comprises a driver (4) connected with the magnetic piece (1) for driving the magnetic piece (1) to move towards the direction of approaching or moving away from the heat storage base plate (5); the magnetic piece (1) moves to the maximum position in the direction of moving away from the heat storage base plate (5), and the magnetic field generator (3) stops providing a magnetic field to the magnetic piece (1); the magnetic piece (1) moves to the maximum position in the direction of approaching the heat storage base plate (5), and the magnetic field generator (3) provides a magnetic field to the magnetic piece (1); the magnetic heating device comprises a heat insulation shell, the magnetic heating device is arranged in the heat insulation shell, the heat conducting piece (2) is fixedly connected with the inner wall of the heat insulation shell, at least one sliding rail is arranged on the inner wall of the heat insulation shell, one end of the sliding rail is connected with the heat conducting piece (2), and the other end of the sliding rail extends towards the direction of approaching the heat storage base plate (5), and the magnetic piece (1) can move along the sliding rail; the charging pile comprises an alternating current power supply, a charging gun, a first converter, and a second converter, the alternating current power supply is connected with the input end of the first converter through a charging line group (6), and the output end of the first converter is connected with the charging gun; the alternating current power supply is connected with the input end of the second converter through a heating line group (7), and the output end of the second converter is connected with the magnetic field generator (3); the charging line group (6) is provided with a first switch (61), the heating line group (7) is provided with a second switch (71); the output end of the second converter is connected with the magnetic field generator (3) through a third line (8), the output end of the second converter is connected with the driver (4) through a fourth line (9), and the third line (8) is provided with a third switch (81).

2. The charging pile according to claim 1, characterized in that, The side of the magnetic member (1) facing the heat storage substrate (5) is referred to as a first bonding surface (11), and the side of the magnetic member (1) away from the heat storage substrate (5) is referred to as a second bonding surface (12); in a state where the magnetic member (1) moves to the maximum position in the direction away from the heat storage substrate (5), the second bonding surface (12) of the magnetic member (1) is bonded to the heat conduction member (2) closest to the second bonding surface (12); in a state where the magnetic member (1) moves to the maximum position in the direction close to the heat storage substrate (5), the first bonding surface (11) of the magnetic member (1) is bonded to the heat storage substrate (5) or the heat conduction member (2) closest to the first bonding surface (11).

3. The charging pile according to claim 1, characterized in that, The charging pile is internally provided with electrical components, which are arranged and assembled on the side of the heat storage substrate (5) away from the magnetic heating device.

4. The charging pile of claim 1, wherein, The driver (4) is provided with a driving rod (41) connected to the magnetic member (1) closest to the heat storage substrate (5), and a connecting rod (42) is arranged between any two adjacent magnetic members (1).

5. A charging method of a charging pile, characterized by, The charging method is applied to the charging pile of any one of claims 1-4, and the charging method comprises: S1, obtaining an opening charging signal; S2, real-time detecting the temperature T1 of the electrical components inside the charging pile; S3, judging whether the temperature T1 of the electrical components inside the charging pile is greater than a first preset value K1; if yes, closing the first switch (61) and charging; if no, performing step S4; S4, closing the second switch (71) and the third switch (81), the driver (4) drives the magnetic member (1) to move to the maximum position in the direction close to the heat storage substrate (5), the magnetic field generator (3) provides a magnetic field for the magnetic member (1), and the closing time P1 of the third switch (81) is timed; S5, judging whether the closing time P1 of the third switch (81) is greater than a first time Q1; if yes, resetting the closing time P1 of the third switch (81), and performing step S6; if no, maintaining the current state and re-executing step S5; S6, the driver (4) drives the magnetic member (1) to move to the maximum position in the direction away from the heat storage substrate (5), while the third switch (81) is opened, the magnetic field generator (3) stops providing a magnetic field for the magnetic member (1), and the opening time P2 of the third switch (81) is timed; S7, judging whether the opening time P2 of the third switch (81) is greater than a second time Q2; if yes, resetting the opening time P2 of the third switch (81) and returning to step S2; if no, maintaining the current state and re-executing step S7.

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