Direct current monitoring module with precision self-checking function

Abstract

The utility model relates to a direct current monitoring module with a precision self-checking function, and belongs to the technical field of electric vehicle charging. The direct current monitoring module with the precision self-checking function comprises a micro-processing module (Y1), a metering module (Y2), a constant voltage source (Y3), a change-over switch (Y4) and a sampling module (Y5). According to the monitoring module, the metering module is respectively connected with the sampling module and the constant voltage source through the change-over switch, so that the direct current monitoring module has a metering state and a self-checking state, the two states are mutually switched, and the problem of inaccurate precision of the charging pile during charging can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle charging, in particular to a direct current monitoring module with a precision self-checking function. Background Art

[0002] With the vigorous development of the electric vehicle industry, the number of electric vehicles has increased rapidly. In order to meet the growing demand for charging, it is necessary to vigorously build public charging piles, but the existing charging piles have the problem of long-term inaccurate charging metering. For example, Chinese patent CN221049542U discloses an electric vehicle AC charging pile control circuit. The power metering module of the charging pile directly reads the data without a calibration function. When the long-term operation may have the problem of inaccuracy, it cannot be automatically adjusted. Utility Model Content

[0003] The utility model provides a DC monitoring module with a self-checking function. The module has a self-checking function and can make timely adjustments when it is detected that the actual charged power is deviated from the set power.

[0004] The embodiment of the present application provides a DC monitoring module with a self-checking function, including: a microprocessor module, a metering module, a constant voltage source, a switch, and a sampling module, wherein:

[0005] Sampling module, used to collect the instantaneous current and voltage output by the charging pile;

[0006] A constant voltage source, used for inputting a constant voltage signal;

[0007] A metering module, connected to the sampling module and the constant voltage source, respectively, for sampling and measuring the signal data input by the sampling module or the constant voltage source;

[0008] A microprocessing module, connected to the metering module, for reading, comparing and adjusting the signal data received by the metering module with the standard data;

[0009] The switching switch is arranged between the sampling module and the metering module, the constant pressure source and the metering module, and the constant pressure source and the microprocessing module. The switching switch switches the sampling module or the constant pressure source to be connected with the metering module according to the command of the microprocessing module.

[0010] In other embodiments, it also includes: a 485 communication module connected to the micro-processing module to enable the client and the micro-processing module to exchange information.

[0011] In other embodiments, it further includes: a key input module connected to the micro-processing module, and the key input module inputs commands to the micro-processing module through keys.

[0012] In other embodiments, the constant voltage source outputs two voltage signals, one is a 500V voltage signal, and the other is a 75mv voltage signal.

[0013] In other embodiments, the microprocessor module adopts the HiTrend HT6025 chip, the metering module adopts the Renergy RN8209C chip, the constant voltage source adopts the high-precision reference chip ADR510ARTZ-REEL7 and REF3030AIDBZR, the switching switch adopts the SGM4583 analog switch, and the 485 communication module adopts the 3peakTPT485E-SO1R chip.

[0014] In other embodiments, the 485 communication module is connected to the microprocessor module via a "TXD485" pin and a "RXD485" pin.

[0015] In other embodiments, the key input module is connected to the microprocessor module via a "KEY1 (INT)" pin.

[0016] In other embodiments, the microprocessor module is connected to the switch via a “Chose” pin.

[0017] In other embodiments, the metering module is connected to the microprocessor module via a "TXD_MCU" pin and a "RXD_MCU".

[0018] In other embodiments, the metering module is connected to the switching switch through the "DCV" pin and the "V1P" pin, and the switching switch is connected to the sampling module through the "Vvolt1" pin and the "Vcircuit2" pin; the metering module is connected to the switching switch through the "DCV" pin and the "V1P" pin, and the switching switch is connected to the constant voltage source through the "Vvolt" pin and the "Vcircuit" pin.

[0019] Compared with the conventional technology, the DC monitoring module with self-checking function provided in the embodiment of the present application has the following advantages:

[0020] (1) The metering module is connected to the sampling module and the constant voltage source by switching the switch, so that the DC monitoring module has two states: metering state and self-test state. The two states are switched to each other, which can adjust the problem of inaccurate charging accuracy of the charging pile;

[0021] (2) By connecting to the client through the 485 communication module, the switching of different states can be remotely controlled; the switching of different states can also be controlled by buttons, and the switching is simple and easy to implement.

[0022] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 It is a block diagram of the internal structure of the embodiment of the utility model;

[0025] Figure 2 This is a peripheral circuit diagram of the main chip of the utility model embodiment;

[0026] Figure 3 This is the self-calibration output and switching circuit diagram of the utility model embodiment

[0027] Figure 4 This is the electric energy metering circuit diagram of the utility model embodiment;

[0028] Figure 5 It is a communication interface circuit diagram of Embodiment 485 of the present utility model;

[0029] Figure 6 This is a key detection circuit diagram of an embodiment of the utility model;

[0030] Among them, there are microprocessor module Y1, metering module Y2, constant voltage source Y3, switch Y4, sampling module Y5, 485 communication module Y6, and key input module Y7. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0032] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0033] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0034] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the" and the like involved in this application do not indicate a quantitative limitation, and may represent the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there may be three relationships, for example, "A and / or B" can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0035] The following will describe an embodiment of the present application by taking a DC monitoring module with a self-checking function as an example.

[0036] like Figure 1As shown, this embodiment provides a DC monitoring module with a self-checking function, including: a microprocessor module Y1, a metering module Y2, a constant voltage source Y3, a switch Y4, and a sampling module Y5, wherein:

[0037] Sampling module Y5 is used to collect the instantaneous current and voltage output by the charging pile;

[0038] Constant voltage source Y3, used for inputting a constant voltage signal;

[0039] The metering module Y2 is connected to the sampling module Y5 and the constant voltage source Y3 respectively, and is used to sample and measure the signal data input by the sampling module Y5 or the constant voltage source Y3;

[0040] The microprocessing module Y1 is connected to the metering module Y2 and is used to read, compare and adjust the signal data received by the metering module Y2 with the standard data;

[0041] The switching switch Y4 is arranged between the sampling module Y5 and the metering module Y2, the constant pressure source Y3 and the metering module Y2, and the constant pressure source Y3 and the microprocessing module Y1. The switching switch Y4 switches the sampling module Y5 or the constant pressure source Y3 to be connected with the metering module Y2 according to the command of the microprocessing module Y1.

[0042] The DC monitoring module provided in this embodiment has two operating states, namely, the metering state and the self-test state. Among them, the metering state is that the switching switch Y4 is connected with the sampling module Y5 and the metering module Y2, and is disconnected from the constant voltage source Y3. When the sampling module Y5 transmits the collected voltage and current to the metering module Y2, the DC metering function is completed. Self-test state: the sampling module Y5 transmits the collected data of the metering module Y2 to the microprocessing module Y1, and the microprocessing module Y1 compares the collected data with the set data. When the monitoring accuracy exceeds the set error, the microprocessing module Y1 controls the switching switch Y4, and the switching switch Y4 is disconnected from the sampling module Y5, and the constant voltage source Y3 and the metering module Y2 are connected. The constant voltage source Y3 continuously inputs a constant pressure to the metering module Y2. When the microprocessing module Y1 detects that the pressure measured by the metering module Y2 is within the set range and the input error is within the set range, it switches to the self-test state.

[0043] This solution solves the problem of large errors between the current charging setting value and the actual charging value of the charging pile by switching between the metering state and the self-test state, and ensures that the charging DC current is consistent with the setting value.

[0044] like Figure 1 As shown, in other embodiments, it also includes:

[0045] The 485 communication module Y6 is connected to the micro-processing module Y1 to enable the client to exchange information with the micro-processing module Y1. The user end can switch the metering state or the self-checking state through the 485 communication module Y6.

[0046] like Figure 1 As shown, in other embodiments, it also includes:

[0047] The key input module Y7 is connected to the microprocessing module Y1, and the key input module Y7 inputs commands to the microprocessing module Y1 through keys. The user can switch the metering state or the self-checking state through the keys of the key input module Y7.

[0048] like Figure 1 As shown, in other embodiments, the constant voltage source Y3 outputs two voltage signals, one is a 500V voltage signal, and the other is a 75mv voltage signal. It can be understood that when the data received by the metering module Y2 from the sampling module Y5 is greater than the set value, that is, the voltage and current input by the charging pile are greater than the actual set value, the constant voltage source Y3 outputs a 75mv voltage signal to complete the balance; if the data received by the metering module Y2 from the sampling module Y5 is less than the set value, the voltage and current input by the charging pile are less than the actual set value, then the constant voltage source Y3 outputs a 500V voltage signal to complete the balance.

[0049] like Figure 2-6 As shown, in other embodiments, the microprocessor module Y1 uses the HT6025 model chip of Juquan, the metering module Y2 uses the RN8209C chip of Ruinengwei, the constant voltage source Y3 uses the high-precision reference chip ADR510ARTZ-REEL7 and REF3030AIDBZR, the switch Y4 uses the SGM4583 analog switch, and the 485 communication module Y6 uses the 3peak TPT485E-SO1R chip. The above chips are common in the market. This embodiment realizes the functions of each module.

[0050] like Figure 2-6 As shown, in other embodiments, the 485 communication module Y6 is connected to the microprocessor module Y1 through the "TXD485" pin and the "RXD485" pin. This embodiment implements the information receiving and sending and processing functions of the 485 communication module Y6, and realizes the information interaction between the client and the microprocessor module.

[0051] like Figure 2-6 As shown, in other embodiments, the key input module Y7 is connected to the microprocessor module Y1 via the "KEY1 (INT)" pin. This embodiment implements key control and key instruction processing functions.

[0052] like Figure 2-6As shown, in other embodiments, the microprocessor module Y1 is connected to the switch Y4 via a "Chose" pin. This embodiment implements the state control of the switch Y4.

[0053] like Figure 2-6 As shown, in other embodiments, the metering module Y2 is connected to the microprocessing module Y1 through the "TXD_MCU" pin and the "RXD_MCU" pin. This embodiment enables the microprocessing module Y1 to process the collected data.

[0054] like Figure 2-6 As shown, in other embodiments, the metering module Y2 is connected to the switching switch Y4 via the "DCV" pin and the "V1P" pin, and the switching switch Y4 is connected to the sampling module Y5 via the "Vvolt1" pin and the "Vcircuit2" pin; this embodiment implements client voltage and current signal sampling.

[0055] like Figure 2-6 As shown, in other embodiments, the metering module Y2 is connected to the switch (Y4) through the "DCV" pin and the "V1P" pin, and the switch (Y4) is connected to the constant voltage source (Y3) through the "Vvolt" pin and the "Vcircuit" pin. This embodiment realizes constant voltage signal sampling.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A DC monitoring module with precision self-checking function, characterized in that: include: Microprocessing module (Y1), metering module (Y2), constant voltage source (Y3), switch (Y4), sampling module (Y5), wherein: The sampling module (Y5) is used to collect the instantaneous current and voltage output by the charging pile; A constant voltage source (Y3) is used to input a constant voltage signal; A metering module (Y2) is connected to the sampling module (Y5) and the constant voltage source (Y3) respectively, and is used to sample and measure the signal data input by the sampling module (Y5) or the constant voltage source (Y3); A microprocessor module (Y1) is connected to the metering module (Y2) and is used to read, compare and adjust the signal data received by the metering module (Y2) with the standard data; The switching switch (Y4) is arranged between the sampling module (Y5) and the metering module (Y2), the constant pressure source (Y3) and the metering module (Y2), and the constant pressure source (Y3) and the microprocessing module (Y1); the switching switch (Y4) switches the sampling module (Y5) or the constant pressure source (Y3) to be connected with the metering module (Y2) according to the command of the microprocessing module (Y1).

2. A DC monitoring module with precision self-checking function according to claim 1, characterized in that: Also includes: The 485 communication module (Y6) is connected to the micro-processing module (Y1) and is used to enable the client to exchange information with the micro-processing module (Y1).

3. A DC monitoring module with precision self-checking function according to claim 1, characterized in that: Also includes: A key input module (Y7) is connected to the microprocessing module (Y1), and the key input module (Y7) inputs commands to the microprocessing module (Y1) through keys.

4. A DC monitoring module with precision self-checking function according to claim 1, characterized in that: The constant voltage source (Y3) outputs two voltage signals, one is a 500V voltage signal, and the other is a 75mv voltage signal.

5. A DC monitoring module with precision self-checking function according to claim 2, characterized in that: The microprocessor module (Y1) adopts the Juquan HT6025 model chip, the metering module (Y2) adopts the Ruinengwei RN8209C chip, the constant voltage source (Y3) adopts the high-precision reference chips ADR510ARTZ-REEL7 and REF3030AIDBZR, the switching switch (Y4) adopts the SGM4583 analog switch, and the 485 communication module (Y6) adopts the 3peak TPT485E-SO1R chip.

6. A DC monitoring module with precision self-checking function according to claim 5, characterized in that: The 485 communication module (Y6) is connected to the microprocessor module (Y1) via a "TXD485" pin and a "RXD485" pin.

7. A DC monitoring module with precision self-checking function according to claim 6, characterized in that: The key input module (Y7) is connected to the microprocessor module (Y1) via a "KEY1 (INT)" pin.

8. A DC monitoring module with precision self-checking function according to claim 7, characterized in that: The microprocessing module (Y1) is connected to the switch (Y4) via a "Chose" pin.

9. A DC monitoring module with precision self-checking function according to claim 8, characterized in that: The metering module (Y2) is connected to the microprocessing module (Y1) via a "TXD_MCU" pin and a "RXD_MCU" pin.

10. A DC monitoring module with precision self-checking function according to claim 9, characterized in that: The metering module (Y2) is connected to the switching switch (Y4) via a "DCV" pin and a "V1P" pin, and the switching switch (Y4) is connected to the sampling module (Y5) via a "Vvolt1" pin and a "Vcircuit2" pin; the metering module (Y2) is connected to the switching switch (Y4) via a "DCV" pin and a "V1P" pin, and the switching switch (Y4) is connected to the constant voltage source (Y3) via a "Vvolt" pin and a "Vcircuit" pin.

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