Charging pile and charging method thereof

Abstract

The invention provides a charging pile and a charging method thereof.The charging pile comprises a heat storage substrate and a magnetic heating device, one end of the magnetic heating device can be attached to or separated from the heat storage substrate, and the other end of the magnetic heating device communicates with the external environment; the magnetic heating device comprises a magnetic field generator and at least one heating module. The heating module comprises a magnetized part and a heat conduction part, and the magnetized part and the heat conduction part are sequentially arranged in the direction from the heat storage substrate to the external environment. The magnetic field generator can provide a magnetic field for the magnetized part in an intermittent mode, and the magnetized part can move in the direction close to or away from the heat storage substrate and is used for conducting heat of the external environment to the heat storage substrate. According to the charging pile, heat can be carried to the heat storage substrate step by step and step by step from the external environment, a good heating effect can be provided for electrical parts in the charging pile, and unnecessary vibration or noise cannot be generated in the whole heat transfer process.

Description

Technical Field

[0001] The present invention relates to the technical field of charging equipment, and in particular to a charging pile and a charging method thereof. Background Art

[0002] With the development of automobile technology, electric vehicles have become more and more common in vehicles. At present, electric vehicles use batteries to provide power to the drive motor, which converts the power of the power source into mechanical energy, and then drives the wheels and working devices through the transmission device or directly. At the same time, electric vehicles are powered by the power stored in the battery and need to be charged through charging piles.

[0003] In northern my country, the outdoor temperature often reaches minus 10 degrees Celsius or even lower in winter. At this time, the charging pile is prone to failure to start normally or low-temperature failure during the charging process, which brings great inconvenience to the use of charging piles in low-temperature environments.

[0004] For this reason, the existing technology often uses heaters, heat pumps and other methods to heat the internal components of the charging pile. Although it can provide a certain heating effect, it often consumes a lot of energy and has a lot of operating noise. For example: the utility model patent with application number 201720468058.8 discloses a low-temperature resistant electric vehicle charging pile. By setting a fan and a heater at the bottom of the charging pile, the fan is controlled to rotate by a controller under low temperature conditions. The fan blows the wind through the heater to heat it and flow upward, so that the heat storage substrate can operate normally. However, this heating form requires the heater to provide a heat source and the fan to promote the flow of hot air. It not only consumes a lot of energy, but also has a lot of operating noise. Summary of the invention

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

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

[0007] A charging pile comprises a heat storage substrate and a magnetic heating device, wherein one end of the magnetic heating device can be attached to or separated from the heat storage substrate, and the other end is connected to the external environment; the magnetic heating device comprises a magnetic field generator and at least one heating module; the heating module comprises a magnetic receiving part and a heat conducting part, and the magnetic receiving part and the heat conducting part are arranged in sequence along the direction from the heat storage substrate to the external environment; the magnetic field generator can provide a magnetic field to the magnetic receiving part in an intermittent form, and the magnetic receiving part can move in a direction close to or away from the heat storage substrate, so as to conduct heat from the external environment to the heat storage substrate.

[0008] Furthermore, when the magnetized component moves to a maximum position in a direction away from the heat storage substrate, the magnetic field generator stops providing a magnetic field to the magnetized component; when the magnetized component moves to a maximum position in a direction close to the heat 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 recorded as the first bonding surface, and the side of the magnetized component away from the heat storage substrate is recorded as the second bonding surface; when the magnetized component moves to a maximum position in a direction away from the heat storage substrate, the second bonding surface of the magnetized component is bonded to the thermal conductive component closest to the second bonding surface; when the magnetized component moves to a maximum position in a direction close to the heat storage substrate, the first bonding surface of the magnetized component is bonded to the heat storage substrate, or to the thermal conductive component closest to the first bonding surface.

[0010] Furthermore, electrical components are arranged inside the charging pile, and the electrical components are arranged and assembled on a side of the heat storage substrate away from the magnetic heating device.

[0011] Furthermore, the magnetic heating device includes a driver, which is connected to the magnetic receiving component and is used to drive the magnetic receiving component to move in a direction close to or away from the heat storage substrate.

[0012] Furthermore, the driver is provided with a driving rod, and the driving rod is connected to the magnetic receiving component closest to the heat storage substrate, and a connecting rod is provided between any two adjacent magnetic receiving components.

[0013] Furthermore, the magnetic heating device includes an insulating shell, in which the magnetic heating device is arranged, the heat conductive component is fixedly connected to the inner wall of the insulating shell, and at least one sliding rail is arranged on the inner wall of the insulating shell, one end of the sliding rail is connected to the heat conductive component, and the other end extends in a direction close to the heat storage substrate, and the magnetic component 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 end of the first converter through a charging line group, and the output end of the first converter is connected to the charging gun; the AC power supply is connected to the input end of the second converter through a heating line group, and the output end of the second converter is connected to a magnetic field generator; the charging line group is provided with a first switch, and the heating line group is provided with a second switch.

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

[0016] A charging method for a charging pile, applied to the charging pile, the charging method comprising: S1, obtaining a charging start signal; S2, real-time detection of the temperature T1 of the electrical components inside the charging pile; S3, judging whether T1 is greater than a first preset value K1; if so, closing the first switch to charge; if not, proceeding to step S4; S4, closing the second switch and the third switch, a driver drives the magnetic component to move to a maximum position in a direction close to a heat storage substrate, a magnetic field generator provides a magnetic field to the magnetic component, and timing the closing time P1 of the third switch; S5, determine whether P1 is greater than the first time length Q1; if so, reset P1 to zero and proceed to step S6; if not, maintain the current state and re-execute step S5; S6, the driver drives the magnetic component to move to the maximum position in the direction away from the heat storage substrate, and at the same time disconnects the third switch, the magnetic field generator stops providing a magnetic field to the magnetic component, and the disconnection time P2 of the third switch is timed; S7, determine whether P2 is greater than the second time length Q2; if so, reset P2 to zero and return to step S2; if not, maintain the current state and re-execute step S7.

[0017] Compared with the prior art, the charging pile and the charging method thereof described in the present invention have the following advantages:

[0018] The charging pile and the charging method thereof described in the present invention enable heat to be "transferred" from the external environment to the heat storage substrate step by step and successively, 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 magnetic component performs intermittent reciprocating movement and the magnetic field generator provides a magnetic field intermittently, and no unnecessary vibration or noise is generated. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

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

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

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

[0024] Figure 5Another structural schematic diagram of the magnetic heating device according to an embodiment of the present invention;

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

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

[0027] Description of reference numerals:

[0028] 1. Magnetic receiving member; 11. First fitting surface; 12. Second fitting surface; 2. Heat conducting member; 3. Magnetic field generator; 4. Driver; 41. Driving rod; 42. Connecting rod; 5. Heat storage substrate; 6. Charging line group; 61. First switch; 7. Heating line group; 71. Second switch; 8. Third line; 81. Third switch; 9. Fourth line. DETAILED DESCRIPTION

[0029] The inventive concepts of the present disclosure will be described below using terms commonly used by those skilled in the art to convey the essence of their work to other persons skilled in the art. However, these inventive concepts can be embodied in many different forms and should not be considered limited to the embodiments described herein.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

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

[0032] In order 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, this embodiment proposes a charging pile, such as the attached Figure 1-7 As shown, the charging pile includes a heat storage substrate 5 and a magnetic heating device, one end of the magnetic heating device can be attached to or separated from the heat 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 magnetic component 1 and a fixed position heat conductive component 2, and the magnetic component 1 and the heat conductive component 2 are arranged in sequence along the direction from the heat storage substrate 5 to the external environment; the magnetic field generator 3 can provide a magnetic field to the magnetic component 1 in an intermittent form, and the magnetic component 1 can move in a direction close to or away from the heat storage substrate 5, so as to conduct the heat of the external environment to the heat storage substrate 5.

[0033] The magnetized component 1 described in the present application is a magnetic material. The property of the magnetic material that it becomes hot when magnetized under the action of a magnetic field and becomes cold when demagnetized is utilized. For the heating module closest to the heat storage substrate 5, the magnetized component 1 is moved to the maximum position (fitting with the heat storage substrate 5) in the direction close to the heat storage substrate 5, and the magnetic field generator 3 provides a magnetic field to the magnetized component 1. The magnetized component 1 transfers heat to the heat storage substrate 5 while being magnetized; after the magnetized component 1 is magnetized, the magnetized magnetized component 1 is moved to the maximum position (fitting with the heat conductive component 2) in the direction away from the heat storage substrate 5, and the magnetic field generator 3 stops providing a magnetic field to the magnetized component 1. The magnetized component 1 becomes cold during the demagnetization process and can absorb the heat of the heat conductive component 2 that is in contact with it (or, the magnetized component 1 transfers the cold to the heat conductive component 2); then, the demagnetized magnetized component 1 is moved toward the heat storage substrate 5 again until it is in contact with it, and the magnetic field generator 3 provides a magnetic field to the magnetized component 1, and the cycle is repeated;

[0034] For the heat conductive component 2 after receiving the cold in the previous text, if only one heating module is set, the heat conductive component 2 can transfer the cold directly to the external environment. If two or more heating modules are set, the cold carried by the heat conductive component 2 itself can be transferred to the magnetized component 1 in the "magnetized heat release state" in the adjacent heating module, so that the cold is transferred along the direction of the heat storage substrate 5 to the external environment. Conversely, it can 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 "transferred" from the external environment to the heat storage substrate 5 step by step and successively, 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 magnetic component 1 performs intermittent reciprocating movements and the magnetic field generator 3 provides a magnetic field intermittently, and no unnecessary vibration or noise is generated.

[0036] Accordingly, the heat storage substrate 5 can be an assembly integrated board, and the internal electrical components of the charging pile can be arranged 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 is maintained by the heated heat storage substrate 5. For the heat conductive member 2 closest to the external environment, fins can be provided, and the fins are provided on the side of the heat conductive member 2 facing the external environment to improve the heat exchange efficiency between the magnetic heating device and the external environment.

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

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

[0039] Generally speaking, the magnetized component 1 moves to the maximum position in the direction away from the heat storage substrate 5, and the magnetic field generator 3 stops providing a magnetic field to the magnetized component 1; the magnetized component 1 moves to the maximum position in the direction close to the heat storage substrate 5, and 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 recorded as the first fitting surface 11, and the side of the magnetized component 1 away from the heat storage substrate 5 is recorded as the second fitting surface 12; when the magnetized component 1 moves to the maximum position in the direction away from the heat storage substrate 5, the second fitting surface 12 of the magnetized component 1 fits with the thermal conductive component 2 closest to the second fitting surface 12; when the magnetized component 1 moves to the maximum position in the direction close to the heat storage substrate 5, the first fitting surface 11 of the magnetized component 1 fits with the heat storage substrate 5, or fits with the thermal conductive component 2 closest to the first fitting surface 11. Accordingly, there is only one magnetized component 1 fitted with the heat storage substrate 5, i.e., the magnetized component 1 in the heating module closest to the heat storage substrate 5, and the remaining magnetized components 1 fit with the thermal conductive component 2 closest to their first fitting surfaces 11.

[0041] The magnetic field generator 3 is a conventional electromagnet in the prior art, which can generate a magnetic field when powered on and stop generating a magnetic field when powered off. The magnetic receiving member 1 includes gadolinium or a gadolinium compound having a magnetocaloric effect. The heat conducting member 2 is a conventional ceramic having relatively good thermal conductivity.

[0042] The magnetic heating device includes a driver 4, which is connected to the magnetized component 1 and is used to drive the magnetized component 1 to move toward or away from the heat storage substrate 5. Each magnetized component 1 may correspond to a driver 4, and the movement of each magnetized component 1 may be driven separately; or all magnetized components 1 may be driven by a driver 4. The driver 4 may be a conventional motor capable of driving linear motion, an electric telescopic push rod mechanism, or a hydraulic telescopic push rod mechanism.

[0043] Preferably, the driver 4 is provided with a driving rod 41, and the driving rod 41 is connected to the magnetic receiving member 1 closest to the heat storage substrate 5, and a connecting rod 42 (attached) is provided between any two adjacent magnetic receiving members 1. Figure 5(indicated by red lines in the figure), so that only one driver is needed to enable all the magnetized parts 1 to move synchronously. Between any two adjacent magnetized parts 1, one end of the connecting rod 42 is connected to the second fitting surface 12 of the magnetized part 1 relatively close to the heat storage substrate 5, and the other end passes through the heat conductive part 2 between the two magnetized parts 1, and is connected to the first fitting surface 11 of the magnetized part 1 relatively far from the heat storage substrate 5. Accordingly, the heat conductive part 2 located between the two magnetized parts 1 is provided with an avoidance hole to avoid spatial interference with the connecting rod 42, while also ensuring the normal movement of the magnetized parts 1.

[0044] The magnetic heating device includes a heat-insulating shell (not shown), which is arranged in the heat-insulating shell, and the heat-conducting member 2 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 member 2, and the other end extends toward the direction close to the heat storage substrate 5, and the magnetic receiving member 1 can move along the sliding rail. Therefore, on the one hand, heat can be "transported" from the external environment to the heat storage substrate 5 step by step and successively, avoiding heat from escaping to the surroundings of the magnetic heating device, and on the other hand, the magnetic receiving member 1 can reciprocate relatively smoothly in the heat-insulating shell, which can effectively prevent the magnetic heating device from generating noise or vibration during operation.

[0045] Specifically, for the sliding rail arranged between the heat storage substrate 5 and the heat conductive member 2 closest to the heat storage substrate 5, one end of the sliding rail is connected to the heat conductive member 2, and the other end extends toward the heat storage substrate 5. It may be connected to the heat storage substrate 5 or may not contact the heat storage substrate 5; for the sliding rail arranged between any two adjacent heat conductive members 2, one end of the sliding rail is connected to one heat conductive member 2, and the other end is connected to the other heat conductive member 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. Of course, it is recommended that the electrical components be assembled on the heat storage substrate 5. The electrical components may be a charging module, a control mainboard, etc. of the charging pile. The charging pile may also be provided with an ambient temperature sensor to obtain the external ambient temperature T2 in real time.

[0047] In addition, 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 end of the first converter through a charging line group 6, and the output end of the first converter is connected to the charging gun; the AC power supply is connected to the input end of the second converter through a heating line group 7, and the output end of the second converter is connected to the magnetic field generator 3. Therefore, in addition to the modification of the additional magnetic heating device in the conventional charging pile, the present application can also modify the charging line of the conventional charging pile. On the basis of maintaining the existing charging line structure, the heating line group 7 and the second converter connected in parallel with the first converter are additionally provided. On the basis of not affecting normal charging, the intermittent operation of the magnetic field generator 3 is powered by the charging pile itself. Among them, the first converter and the second converter are both conventional AC-DC converters, which input AC power from their input ends and can output DC power of specific specifications from their output ends. The central controller can be connected to the charging gun to obtain whether the charging gun is connected to the electric vehicle.

[0048] Preferably, the charging line group 6 is provided with a first switch 61, and the heating line group 7 is provided with a second switch 71, so that the intermittent operation of the magnetic field generator 3 is achieved by intermittently opening and closing the second switch 71, and the charging pile does not affect the charging of the electric vehicle through the charging line group 6.

[0049] Furthermore, the output end of the second converter is connected to the magnetic field generator 3 through the third line 8, and the output end of the second converter is connected to the driver 4 through the fourth line 9, and the third line 8 is provided with a third switch 81. Thus, the intermittent operation of the magnetic field generator 3 and the intermittent movement of the magnetic receiving part 1 can be realized respectively without interfering with the charging of the charging pile. Among them, the central controller is connected to the first switch 61, the second switch 71, and the third switch 81, and is used to control the opening and closing of the corresponding switches.

[0050] On this basis, the present application further proposes a charging method for a charging pile, comprising:

[0051] S1, obtaining a charging start signal;

[0052] The charging start signal may be a user pressing a charging start button, or clicking on the app of the smart terminal to start charging. Preferably, step S1 includes: obtaining a charging start signal, determining whether the charging gun is normally connected to the electric vehicle; if so, proceeding to step S2; if not, reminding that the charging gun is abnormally connected.

[0053] S2, real-time detection of the temperature T1 of the electrical components inside the charging pile;

[0054] S3, determine whether T1 is greater than a first preset value K1; if so, close the first switch 61 to charge; if not, proceed to step S4;

[0055] Among them, since the cold resistance and safety requirements of charging piles and their electrical components of different specifications are often different, K1 in this application is a preset temperature value. This application does not make specific limitations, but only uses individual numbers as examples, for example: K1 is about 5°C.

[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 maintained 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 magnetic receiving 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 to the magnetic receiving member 1, and the closing time P1 of the third switch 81 is timed;

[0058] In the state of step S4, the magnetized component 1 is attached to the heat storage substrate 5 or the heat conductive component 2, and the magnetic field generator 3 provides a magnetic field to the magnetized component 1. The magnetized component 1 transfers heat to the heat storage substrate 5 or the heat conductive component 2 while being magnetized.

[0059] S5, determine whether P1 is greater than the first time length Q1; if so, reset P1 to zero and proceed to step S6; if not, maintain the current state and re-execute step S5;

[0060] S6, the driver 4 drives the magnetic receiving member 1 to move to the maximum position in the direction away from the heat storage substrate 5, and disconnects the third switch 81, the magnetic field generator 3 stops providing the magnetic field to the magnetic receiving member 1, and the disconnection time P2 of the third switch 81 is timed;

[0061] S7, determine whether P2 is greater than the second time length Q2; if so, reset P2 to zero and return to step S2; if not, maintain the current state and re-execute step S7.

[0062] Among them, the first duration Q1 and the second duration Q2 are both preset time data, which will be affected by multiple factors such as thermal conductivity of different materials, component size specifications, and bonding surface area. This application does not make specific limitations on their specific data, but only uses individual numbers as examples, for example: Q1 is about 4 minutes, and Q2 is about 5 minutes.

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

[0064] Therefore, the present application uses the charging method to first detect and analyze the temperature T1 of the electrical components inside the charging pile when the user starts charging. If T1 is low, the intermittent operation of the magnetic field generator 3 and the intermittent movement of the magnetic receiving component 1 can be automatically adjusted to heat the heat storage substrate 5, thereby causing the electrical components inside the charging pile to heat up, and charging is started after T1 meets the normal operating temperature of the electrical components inside the charging pile. This can improve the intelligence and automation of the charging pile during the charging startup process, and can avoid abnormal low-temperature startup of the charging pile, low-temperature failure of electrical components, and the like.

[0065] In order to further improve the intelligence of the charging pile during the charging start-up process, the present application further improves step S3. Specifically, step S3 includes:

[0066] S31, real-time detection of external environment temperature T2;

[0067] S32, determine whether T1 is greater than a first preset value K1, or whether T2 is greater than a second preset value K2; if so, close the first switch 61 to charge; if not, proceed to step S4.

[0068] That is, this application detects and analyzes T1 and T2 respectively, and uses two-level judgment conditions to start the magnetic heating device to heat the heat storage substrate 5 only when T1≤K1 and T2≤K2, so as to avoid starting the magnetic heating device when the ambient temperature is still relatively suitable, resulting in unnecessary delays in charging start, and can also effectively avoid frequent start and stop of the magnetic heating device. K1 is consistent with the previous text, and K2 is also a preset temperature value. This application does not make specific restrictions, but only uses individual numbers as examples, for example: K2 is about 0°C.

[0069] In addition, even after charging is started, the ambient temperature in northern regions often varies in winter, and some extremely cold weather often causes the temperature of electrical components to drop, making it difficult for the charging pile to remain in a relatively stable and suitable temperature range during operation.

[0070] To this end, the present application further proposes a charging method for the charging process after charging is started, that is, during the charging process of the charging pile, the charging method includes:

[0071] B1, real-time detection of the temperature T1 of the internal electrical components of the charging pile, the external environment temperature T2, and the temperature T3 of the heat storage substrate 5;

[0072] The temperature T3 of the heat storage substrate 5 can be obtained by setting a corresponding temperature sensor, which will not be described in detail.

[0073] B2. Determine whether T2>K2; if so, keep the charging pile in normal operation and return to step B1; if not, proceed to step B3;

[0074] In the normal operation state of the charging pile, the magnetic heating device is in a shutdown state, and correspondingly, the second switch 71 and the third switch 81 are both in an off state. K2 is consistent with the above and will not be described in detail.

[0075] B3, determine whether T2 is greater than a third preset value K3; if so, proceed to step B4; if not, proceed to step B6;

[0076] Among them, K3<K2, K3 is a preset temperature value, which is not specifically limited in this application, and is only exemplified by individual numbers, for example: K3 is about -10°C.

[0077] B4, determine whether T1>K1; if so, keep the charging pile in normal operation and return to step B1; if not, proceed to step B5;

[0078] Among them, K1 is consistent with the previous article and will not be elaborated on.

[0079] B5. Determine whether the sum of T3 and T2 is greater than T1; if so, keep the charging pile in normal operation and return to step B1; if not, 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 so, proceed to step B7; if not, maintain the normal operation state of the charging pile and return to step B1;

[0081] Among them, the temperature change value is the difference between the current temperature and the temperature at the previous unit time point, which is also in line with the change value in the conventional mathematical sense and will not be elaborated. 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 restrictions, and only uses individual numbers as examples, for example: the unit time is 10s, and K4 is 0°C.

[0082] B7, close the second switch 71 and the third switch 81, the driver 4 drives the magnetic receiving 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 to the magnetic receiving member 1, and the closing time P1 of the third switch 81 is timed;

[0083] B8, determine whether P1 is greater than the first time length Q1; if so, reset P1 to zero and proceed to step B9; if not, maintain the current state and re-execute step B8;

[0084] B9, the driver 4 drives the magnetic receiving member 1 to move to the maximum position in the direction away from the heat storage substrate 5, and disconnects the third switch 81 at the same time, the magnetic field generator 3 stops providing the magnetic field to the magnetic receiving member 1, and the disconnection time P2 of the third switch 81 is timed;

[0085] B10, determine whether P2 is greater than the second time length Q2; if so, reset P2 to zero and return to step B1; if not, maintain the current state and re-execute step B10.

[0086] Therefore, after charging starts, the present application detects and analyzes T1, T2, and T3 in real time; when T2>K2, it indicates that the ambient temperature can meet the minimum temperature requirement for normal operation of the charging pile, and there is no need to start the magnetic heating device;

[0087] When T2≤K3, it means that the ambient temperature is very low, and the temperature inside the charging pile is easy to drop, affecting the normal operation of the charging pile; accordingly, the present application timely detects and analyzes the temperature change of T1 in unit time, and once T1 starts to show a downward trend, the magnetic heating device is immediately turned on for advance heating, which can be timely and effectively "preventive" heating in extremely cold weather, avoiding starting heating after the temperature inside the charging pile drops to a certain fixed value, and eliminating the lag of heating action;

[0088] When K3<T2≤K2, it indicates that the ambient temperature is relatively low, and the temperature inside the charging pile may drop; accordingly, the present application firstly 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 internal electrical components of the charging pile can maintain a good operating temperature and a 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, and the temperature difference between the heat storage substrate 5 and the electrical components arranged on the heat storage substrate 5 is analyzed by using the external ambient temperature T2 as a temperature compensation. When T3+T2>T1, it indicates that the heat storage substrate 5 is Board 5 still has the ability to heat and keep the electrical components warm, and the magnetic heating device can be temporarily turned off to reduce unnecessary energy consumption as much as possible. When T3+T2≤T1, it means that the heat storage substrate 5 is insufficient to heat and keep the electrical components warm, and the magnetic heating device needs to be turned on in time to avoid T1 gradually decreasing due to the heat storage substrate 5 losing its heating capacity at a lower ambient temperature. Therefore, the present application proposes a charging method during the charging process, so that when the charging pile is charging in cold weather, it can timely and effectively heat and regulate the internal electrical components of the charging pile, thereby improving the intelligence and automation of the operation of the charging pile, and is also conducive to improving the accuracy of the heating regulation of the internal electrical components by the charging pile.

[0089] Among them, steps B7-B10 are the process of "heat transfer" performed by the magnetic heating device, which are the same as steps S4-S7 in the previous text and will not be repeated here.

[0090] In the present invention, any charging pile may include the technical solution related to the charging pile described in this embodiment; based on the technical solution provided in this application, the charging pile also includes conventional components of the charging pile including a shell, a communication module or a human-computer interaction module. Since these conventional components can 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A charging pile, characterized in that: The charging pile comprises a heat storage substrate (5) and a magnetic heating device, one end of the magnetic heating device can be attached to or separated from the heat storage substrate (5), and the other end is connected to 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 receiving component (1) and a heat conducting component (2), and the magnetic receiving component (1) and the heat conducting component (2) are arranged in sequence along the direction from the heat storage substrate (5) to the external environment; the magnetic field generator (3) can provide a magnetic field to the magnetic receiving component (1) in an intermittent manner, and the magnetic receiving component (1) can move in a direction close to or away from the heat storage substrate (5), so as to conduct heat from the external environment to the heat storage substrate (5).

2. A charging pile according to claim 1, characterized in that: When the magnetized component (1) moves to a maximum position in a direction away from the heat 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 a maximum position in a direction close to the heat storage substrate (5), the magnetic field generator (3) provides a magnetic field to the magnetized component (1).

3. A charging pile according to claim 2, characterized in that: The side of the magnetized component (1) facing the heat storage substrate (5) is recorded as the first bonding surface (11), and the side of the magnetized component (1) away from the heat storage substrate (5) is recorded as the second bonding surface (12); when the magnetized component (1) moves to a maximum position in a direction away from the heat storage substrate (5), the second bonding surface (12) of the magnetized component (1) is bonded to the heat conductive component (2) closest to the second bonding surface (12); when the magnetized component (1) moves to a maximum position in a direction close 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 conductive component (2) closest to the first bonding surface (11).

4. A charging pile according to claim 1, characterized in that: An electrical component is arranged inside the charging pile, and the electrical component is arranged and assembled on a side of the heat storage substrate (5) away from the magnetic heating device.

5. A charging pile according to claim 1, characterized in that: The magnetic heating device comprises a driver (4), wherein the driver (4) is connected to the magnetic receiving component (1) and is used to drive the magnetic receiving component (1) to move in a direction approaching or away from the heat storage substrate (5).

6. A charging pile according to claim 5, characterized in that: The driver (4) is provided with a driving rod (41), the driving rod (41) is connected to the magnetic receiving component (1) closest to the heat storage substrate (5), and a connecting rod (42) is provided between any two adjacent magnetic receiving components (1).

7. A charging pile according to claim 1, characterized in that: The magnetic heating device comprises a heat-insulating shell, wherein the magnetic heating device is arranged in the heat-insulating shell, the heat-conducting member (2) is fixedly connected to the inner wall of the heat-insulating shell, and at least one sliding rail is arranged on the inner wall of the heat-insulating shell, one end of the sliding rail is connected to the heat-conducting member (2), and the other end extends in a direction close to the heat storage substrate (5), and the magnetic receiving member (1) can move along the sliding rail.

8. A charging pile according to claim 1, characterized in that: The charging pile comprises an AC power supply, a charging gun, a first converter and a second converter; the AC power supply is connected to the input end of the first converter via a charging line group (6), and the output end of the first converter is connected to the charging gun; the AC power supply is connected to the input end of the second converter via a heating line group (7), and the output end of the second converter is connected to a magnetic field generator (3); the charging line group (6) is provided with a first switch (61), and the heating line group (7) is provided with a second switch (71).

9. A charging pile according to claim 8, characterized in that: The output end of the second converter is connected to the magnetic field generator (3) via a third line (8), the output end of the second converter is connected to the driver (4) via a fourth line (9), and the third line (8) is provided with a third switch (81).

10. A charging method for a charging pile, characterized in that: The charging method is applied to the charging pile according to any one of claims 1 to 9, and the charging method comprises: S1, obtaining a charging start signal; S2, real-time detection of the temperature T1 of the electrical components inside the charging pile; S3, determining whether T1 is greater than a first preset value K1; if so, closing the first switch (61) to charge; if not, proceeding to step S4; S4, closing the second switch (71) and the third switch (81), the driver (4) drives the magnetic receiving component (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 to the magnetic receiving component (1), and the closing time P1 of the third switch (81) is timed; S5, determine whether P1 is greater than the first time length Q1; if so, reset P1 to zero and proceed to step S6; if not, maintain the current state and re-execute step S5; S6, the driver (4) drives the magnetic receiving component (1) to move to the maximum position in a direction away from the heat storage substrate (5), and at the same time disconnects the third switch (81), the magnetic field generator (3) stops providing a magnetic field to the magnetic receiving component (1), and the disconnection time P2 of the third switch (81) is timed; S7, determine whether P2 is greater than the second time length Q2; if so, reset P2 to zero and return to step S2; if not, maintain the current state and re-execute step S7.

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