Charging structure, testing method thereof and charging device

Abstract

The invention provides a charging structure, a testing method thereof and a charging device, and relates to the technical field of vehicle charging. The structure comprises a charging pile, the charging pile is electrically connected with a charging socket of a vehicle through a charging loop, and the charging socket is used for receiving an interference signal; the charging pile is used for monitoring the charging state of the vehicle through the charging loop; the charging loop is provided with a filtering module, and the filtering module is used for filtering interference signals coupled to the charging loop. Compared with the prior art, the interference signal of the specific frequency of the charging loop is specially filtered, so that the stability of the judgment signal of the charging pile is ensured, and the problem that the normal charging of the charging pile is influenced due to the misjudgment of the charging pile controller caused by voltage fluctuation is solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle charging technology, and in particular to a charging structure and a testing method thereof, and a charging device. Background Art

[0002] In the DC charging anti-interference experiment for the entire vehicle, it is necessary to bring the signal from the DC charging pile outside the laboratory into the laboratory to charge the charging equipment. To control the charging of the charging pile, it is necessary to detect the voltage at both ends of the preset circuit of the charging pile controller (usually called the CC1 loop) to determine whether the current charging conditions are met. However, in the anti-interference experiment, the interference signal intentionally applied by the laboratory will couple to the CC1 signal, causing co-frequency interference with the normal voltage. The voltage fluctuation will cause the charging pile controller to misjudge, which in turn affects the normal charging of the charging pile. Summary of the Invention

[0003] In view of this, the present application provides a charging structure and its testing method, as well as a charging device, the main purpose of which is to solve the problem in the current anti-interference experiment that the interference signal will cause voltage fluctuations and lead to misjudgment of the charging pile controller, thereby affecting the normal charging of the charging pile.

[0004] To achieve the above objectives, the present application discloses a charging structure in a first aspect, the method comprising:

[0005] A charging pile, the charging pile being electrically connected to a charging socket of a vehicle via a charging circuit, the charging socket being used to receive an interference signal; the charging pile being used to monitor the charging status of the vehicle via the charging circuit;

[0006] The charging circuit is provided with a filter module, and the filter module is used to filter out the interference signal coupled to the charging circuit.

[0007] Optionally, the charging structure further includes: a charging pile controller, which is communicatively connected to the vehicle-end controller via a CAN bus and is used to communicate with the vehicle-end controller in real time to control the charging pile.

[0008] Optionally, the charging structure also includes auxiliary equipment, which includes: an artificial power supply network, which is arranged between the charging pile and the charging socket through a charging harness to provide stable impedance; an optocoupler, which is arranged between the charging pile controller and the vehicle-end controller to convert photoelectric signals.

[0009] Optionally, the auxiliary equipment further includes a jumper device; the charging structure further includes: an auxiliary power supply unit, which is connected to the vehicle-end controller through the jumper device for auxiliary power supply.

[0010] Optionally, the filtering module includes: a differential mode magnetic ring connected in series to the charging circuit;

[0011] a differential mode capacitor, one end of which is connected to the differential mode magnetic ring and the other end of which is grounded;

[0012] The number of the differential mode magnetic ring and the number of the differential mode capacitor are both at least one, and one end of one differential mode magnetic ring is only connected to one differential mode capacitor.

[0013] Optionally, the inductance value of the differential mode magnetic ring is in the range of 50-400uH, and the material of the differential mode magnetic ring includes amorphous material or ferrite material; the differential mode capacitor is a safety-grade film capacitor.

[0014] Optionally, the differential mode magnetic ring includes at least one first differential mode magnetic ring and at least one second differential mode magnetic ring, the first differential mode magnetic ring is made of amorphous material, and the second differential mode magnetic ring is made of ferrite material.

[0015] Optionally, the filter module is encapsulated in a metal cabin, and the metal cabin is fixed in the charging pile.

[0016] In a second aspect of the present application, an embodiment provides a charging method, which is applied to the charging structure described in the first aspect, and the method includes:

[0017] applying an interference signal to the charging socket;

[0018] The charging state of the vehicle is monitored through a charging circuit, and the interference signal on the charging circuit is filtered out based on a filtering module.

[0019] In a third aspect of the present application, an embodiment provides a charging device, which is equipped with the charging structure described in the first aspect.

[0020] In summary, according to the technical solutions disclosed in this application, a charging structure and testing method thereof, as well as a charging device, are provided. These include: a charging pile electrically connected to a vehicle's charging socket via a charging circuit, the charging socket being configured to receive interference signals; a charging pile configured to monitor the vehicle's charging status via the charging circuit; and a filtering module provided on the charging circuit for filtering out interference signals coupled into the charging circuit. Compared to related technologies, this method specifically filters interference signals of specific frequencies in the charging circuit, ensuring the stability of the charging pile's determination signal. This addresses the issue of voltage fluctuations leading to misjudgments by the charging pile controller, which in turn affect the normal charging of the charging pile.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 A schematic diagram of the application architecture of a charging structure provided by an embodiment of the present application is shown;

[0025] Figure 2 A schematic diagram of a filtering module provided in an embodiment of the present application is shown;

[0026] Figure 3 A schematic diagram of a metal cabin for encapsulating a filter module provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0028] In order to solve the problem that the interference signal in the current anti-interference experiment will cause voltage fluctuations and lead to misjudgment of the charging pile controller, thereby affecting the normal charging of the charging pile. This embodiment provides a charging structure, such as Figure 1 The figure shows the application architecture of the charging structure provided by this embodiment, including: a charging pile, which is electrically connected to the vehicle's charging socket via a charging circuit, and the charging socket is used to receive interference signals; the charging pile is used to monitor the vehicle's charging status through the charging circuit; and a filtering module is provided on the charging circuit to filter out interference signals coupled to the charging circuit. The charging circuit is the CC1 circuit.

[0029] Combine Figure 1The charging structure may also include charging equipment, which can be used to supply power or control power supply. Among them, the charging equipment includes a DC fast charging pile, which is electrically connected to the vehicle's charging socket through two charging harnesses DC+ and DC-, and the charging socket is electrically connected to the vehicle's battery pack. A CC1 circuit ( Figure 1 Although the filter module is located in the charging pile controller circuit, in actual applications, it can be isolated by a metal casing and installed in the charging pile. By installing the filter module in this circuit, interference signals coupled to the CC1 circuit are filtered. In addition, the charging equipment also includes a charging pile controller and an auxiliary power supply unit.

[0030] The CC1 circuit is also called the DC fast charging standard circuit (Combined Charging System). During the charging process, the off-board charging device (charging pile) continuously monitors the connection status of the charging plug and charging socket by connecting the input voltage signal of the confirmation contact (usually by collecting the voltage value at a certain point). If any abnormality is detected, the off-board charging device immediately shuts off the DC power output.

[0031] It should be noted that the charging structure mentioned in this embodiment is an application architecture used in electromagnetic laboratories. Figure 1 The darkroom in the lab is a test chamber, housing an electric vehicle, including a battery pack and on-board controller. Charging equipment is operated outdoors to observe vehicle parameters inside the chamber, enabling anti-interference testing. The darkroom primarily houses the DC charging station, charging station controller, and auxiliary power supply. These high-voltage and signal cables enter the lab through walls. The darkroom primarily contains high- and low-voltage wiring harnesses, a labor-intensive network (LISN), optocouplers, charging connectors, and the vehicle. The LISN and optocouplers are auxiliary test equipment, ensuring that their own interference issues during the anti-interference test do not affect the formal test and judgment. In this context, during anti-interference testing of the entire vehicle, interference signals are artificially applied. These signals can couple to the CC1 signal, causing co-frequency interference with the normal voltage, leading to signal misinterpretation by the charging station. Normally, the CC1 circuit has two 1MHz DC (DC) converters responsible for converting signals between analog and optical signals. When the analog signal reaches the charging pile, its voltage is detected to determine whether it meets the charging conditions. Therefore, interference can easily cause voltage fluctuations, which can lead to misjudgment by the charging pile and termination of charging. Therefore, in this embodiment, by specifically filtering the CC1 circuit signal, the stability of the charging pile determination signal is ensured, solving the problem of voltage fluctuations leading to misjudgment by the charging pile controller, which in turn affects normal charging of the charging pile.

[0032] Optionally, the charging structure further includes: a charging pile controller, which is communicatively connected to the vehicle-side controller via a CAN bus and is used to communicate with the vehicle-side controller in real time to control the charging of the charging pile.

[0033] In this embodiment, combined with Figure 1 For example, the charging structure includes a charging device, the charging device includes a charging pile controller, and the charging pile controller and the vehicle-side controller are connected to each other via a CAN bus. Figure 1 The S+ and S- are CAN signals, which are mainly responsible for real-time communication between the vehicle and the charging pile, confirming the identity, and adjusting the charging power according to the battery power.

[0034] Optionally, the charging structure also includes auxiliary equipment, which includes: an artificial power supply network, which is arranged between the charging pile and the charging socket through a charging harness to provide stable impedance; an optocoupler, which is arranged between the charging pile controller and the vehicle-end controller to convert photoelectric signals.

[0035] In this embodiment, the auxiliary equipment includes an artificial power network (also called a Line Impedance Stabilization Network, LISN) and an optical coupler for optical-electrical signal conversion.

[0036] Optionally, the auxiliary equipment also includes a jumper device; the charging structure also includes: an auxiliary power supply unit, which is connected to the vehicle-end controller through the jumper device for auxiliary power supply.

[0037] In this embodiment, the jumper device is used to make auxiliary connections between the equipment inside and outside the darkroom. The charging device also includes an auxiliary power supply unit, such as Figure 1 The A+ and A- signals in the vehicle pass through the wall into the darkroom through the jumper device and are connected to the vehicle's subsequent equipment such as lighting for auxiliary power supply.

[0038] Next, the structure of the filter module is described. Figure 2 As shown, the filtering module includes: a differential mode magnetic ring, connected in series to the charging circuit; a differential mode capacitor, one end of which is connected to the differential mode magnetic ring and the other end is grounded; the number of differential mode magnetic rings and differential mode capacitors is at least one, and one end of a differential mode magnetic ring is only connected to one differential mode capacitor.

[0039] In this embodiment, Vin and Vout are the input and output ends of the filter module, which are connected to the CCI circuit to form the circuit backbone of the charging circuit. LDM1 and LDM2 are two differential-mode magnetic rings connected in series on the circuit backbone of the charging circuit. CX1, CX2, and CX3 are three differential-mode capacitors, one end of which is connected to the differential-mode magnetic ring and the other end is grounded. There is at least one differential-mode magnetic ring and differential-mode capacitor, and one end of the differential-mode magnetic ring is only connected to one differential-mode capacitor. The differential-mode filter circuit is essentially a filter that filters out interference at a specific frequency. When the voltages of the two signal lines are different, the differential-mode filter capacitor in the middle will be charged, that is, the differential-mode interference will be filtered out. The interference signal on one signal line can only be filtered by the differential-mode magnetic ring and differential-mode capacitor. The number of settings in the figure is only for reference. There is no limit on the number of differential-mode magnetic rings and differential-mode capacitors, and it is adjusted according to the specific filtering effect.

[0040] Furthermore, the inductance value of the differential mode magnetic ring ranges from 50 to 400 uH, and the material of the differential mode magnetic ring includes an amorphous material or a ferrite material; the differential mode capacitor uses a safety-grade film capacitor.

[0041] In this embodiment, the inductance of the differential mode magnetic ring ranges from 50-400uH, mainly to suppress low-frequency interference. The material can be amorphous materials such as amorphous magnetic rings with excellent performance or ferrite materials. The differential mode capacitor uses a safety-grade film capacitor, for example, with a nominal 275V and a capacitance of 1uF.

[0042] Furthermore, the differential mode magnetic ring includes at least one first differential mode magnetic ring and at least one second differential mode magnetic ring, the first differential mode magnetic ring is made of amorphous material, and the second differential mode magnetic ring is made of ferrite material.

[0043] In this embodiment, when the number of differential-mode magnetic rings is at least two, different materials are selected for the two differential-mode magnetic rings for diversified combinations. For example, when the material of the first differential-mode magnetic ring is amorphous, the material of the second differential-mode magnetic ring is ferrite; or, when the material of the first differential-mode magnetic ring is ferrite, the material of the second differential-mode magnetic ring is amorphous. This can effectively target the interference frequency band that needs to be suppressed, thereby achieving targeted filtering processing. The differential-mode inductor magnetic material is amorphous, which has stronger and wider filtering characteristics and stability.

[0044] Optionally, the filter module is encapsulated in a metal cabin, and the metal cabin is fixed in the charging pile.

[0045] like Figure 3 The figure shows a schematic diagram of a metal cabin encapsulating a filter module provided by this embodiment. This metal cabin can generally be fixed in a DC charging pile and placed as close as possible to the voltage collection point. Its input and output lines should avoid running parallel to other lines as much as possible, and each grounding point must be reliably grounded.

[0046] exist Figure 3 In the figure, punctuation 1 and punctuation 2 are input and output leads, corresponding to Figure 2 The Vin and Vout of the filter module are shown in Figure 3. Mark 3 is the mounting edge of the metal compartment, which has fixing holes for securing it to the charging station. Mark 4 is the metal compartment body, whose top cover can be opened to house the internal circuitry. The cover is then sealed by welding.

[0047] Optionally, a filler is provided in the metal cabin to fix the filter module inside the metal cabin.

[0048] In this embodiment, materials such as resin may be filled to fix the internal filter module circuit.

[0049] Furthermore, this embodiment also proposes a charging method, which is applied to the charging structure mentioned above, and the method includes: applying an interference signal to the charging socket; monitoring the charging status of the vehicle through the charging circuit, and filtering the interference signal on the charging circuit based on the filtering module.

[0050] From the above content, we can know that the interference signal artificially applied in the anti-interference test will affect the voltage value of the detection point of the CC1 circuit (such as Figure 1 The detection point 1) in the circuit is affected, and it is easy to cause voltage fluctuations when it is interfered, which may cause the charging pile to misjudge and terminate charging. Therefore, in this embodiment, the signal of the CC1 circuit is specially filtered to ensure the stability of the charging pile judgment signal, solve the problem that the voltage fluctuation causes the charging pile controller to misjudge, thereby affecting the normal charging of the charging pile. It should be noted here that the artificially applied interference signal may not be directly applied to the charging socket. For example, an interference signal can be applied to the vehicle end in a dark room, but the signal passes through the current or directly affects the voltage detection point on the CC1 circuit, thereby affecting the judgment of the charging pile controller. Then the charging pile or charging pile controller monitors the charging status of the vehicle through the charging circuit, and filters out the interference signal of a specific frequency applied to the charging circuit based on the filtering module.

[0051] In summary, the charging structure, test method, and charging device proposed in this embodiment, on the one hand, provide a method for using a dedicated filter module for CC1 loop signals in a laboratory DC charging pile, thereby improving the anti-interference capability of charging immunity testing and avoiding misjudgments. On the other hand, through the filtering circuit and a diverse combination of differential-mode magnetic materials, targeted filtering is performed according to the interference frequency band to be suppressed, thereby improving the filtering effect.

[0052] Based on this understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, USB flash drive, mobile hard disk, etc.), and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of various implementation scenarios of the present application.

[0053] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the physical device, supporting the execution of information processing programs and other software and / or programs. The network communication module is used to enable communication between components within the storage medium, as well as with other hardware and software within the physical information processing device.

[0054] The present application also provides a charging device, which may include: Figure 1 The charging structure shown. The charging device can be specifically an integrated charging pile, etc.

[0055] Through the description of the above implementation methods, those skilled in the art can clearly understand that the present application can be implemented by means of software plus the necessary general hardware platform, or by hardware. By applying the solution of this embodiment, a charging structure and its test method, and a charging device are provided, which include: a charging pile, the charging pile is electrically connected to the charging socket of the vehicle through a charging circuit, and the charging socket is used to receive interference signals; the charging pile is used to monitor the charging status of the vehicle through the charging circuit; a filter module is provided on the charging circuit, and the filter module is used to filter out interference signals coupled to the charging circuit. Compared with the related art, by specially filtering the interference signal of a specific frequency of the charging circuit, the stability of the charging pile judgment signal is guaranteed, and the problem of misjudgment of the charging pile controller due to voltage fluctuations, which in turn affects the normal charging of the charging pile, is solved.

[0056] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand and implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments described herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

[0057] The above description and accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replaced with portions and features of other embodiments. As used in this application, the term "and / or" means including any and all possible combinations of one or more associated listed items. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups thereof. Without further limitation, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or device that includes the element. In this document, each embodiment may focus on the differences from other embodiments, and similar parts between the embodiments can be referenced. For methods, devices, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can be referenced in the description of the method part.

[0058] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. The technicians will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0059] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical functional division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, and can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. In addition, the functional units in the embodiments of the present disclosure may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article or device. In the absence of further limitations, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0061] The above are merely specific embodiments of the present application, which are intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments herein, but rather is intended to conform to the widest scope consistent with the principles and novel features of the present application.

Claims

1. A charging structure, characterized in that: include: A charging pile, the charging pile being electrically connected to a charging socket of a vehicle via a charging circuit, the charging socket being used to receive an interference signal; the charging pile being used to monitor the charging status of the vehicle via the charging circuit; The charging circuit is provided with a filtering module, and the filtering module is used to filter out the interference signal coupled to the charging circuit.

2. The charging structure according to claim 1, characterized in that: The charging structure further includes: The charging pile controller is connected to the vehicle-side controller via the CAN bus and is used to communicate with the vehicle-side controller in real time to control the charging pile.

3. The charging structure according to claim 2, characterized in that: The charging structure further includes auxiliary equipment, which includes: An artificial power network, provided between the charging pile and the charging socket, for providing stable impedance; An optical coupler is provided between the charging pile controller and the vehicle-end controller for photoelectric signal conversion.

4. The charging structure according to claim 3, characterized in that: The auxiliary equipment also includes a jumper device; The charging structure further includes: an auxiliary power supply unit, which is connected to the vehicle-end controller via the jumper device and is used for auxiliary power supply.

5. The charging structure according to claim 1, characterized in that: The filtering module includes: A differential mode magnetic ring, connected in series to the charging circuit; a differential mode capacitor, one end of which is connected to the differential mode magnetic ring and the other end of which is grounded; The number of the differential mode magnetic ring and the number of the differential mode capacitor are both at least one, and one end of one differential mode magnetic ring is only connected to one differential mode capacitor.

6. The charging structure according to claim 5, characterized in that: The inductance value of the differential mode magnetic ring ranges from 50 to 400 uH, and the material of the differential mode magnetic ring includes an amorphous material or a ferrite material; the differential mode capacitor is a safety-grade film capacitor.

7. The charging structure according to claim 6, characterized in that: The differential mode magnetic ring includes at least one first differential mode magnetic ring and at least one second differential mode magnetic ring. The first differential mode magnetic ring is made of amorphous material, and the second differential mode magnetic ring is made of ferrite material.

8. The charging structure according to claim 1, characterized in that: The filter module is encapsulated in a metal cabin, and the metal cabin is fixed in the charging pile.

9. A charging structure testing method, characterized in that: Applied to the charging structure according to any one of claims 1 to 8, the method comprises: applying an interference signal to the charging socket; The charging state of the vehicle is monitored through a charging circuit, and the interference signal on the charging circuit is filtered out based on a filtering module.

10. A charging device, characterized in that: The charging structure comprises the charging structure according to any one of claims 1 to 8.

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