Circuit board for group charging equipment and group charging equipment

Abstract

The utility model discloses a circuit board for group charging equipment and the group charging equipment, and belongs to the technical field of electronics and electrics. The circuit board comprises a strip-shaped isolation region, and a first subregion and a second subregion which are separated at two sides of the strip-shaped isolation region, wherein the first subarea comprises a controller area, and the controller area is used for installing a controller of the group charging equipment; the second subarea comprises a relay terminal area, and the relay terminal area is used for installing a plurality of terminals used for connecting relays in the group charging equipment; the strip-shaped isolation area comprises an isolator area, the isolator area comprises at least two isolator installation positions arranged in the extending direction of the strip-shaped isolation area, and a connecting line used for connecting the first end of an isolator to a controller is arranged in the first subarea. And a connecting wire for connecting the second end of the isolator to the wiring end is arranged in the second subarea. According to the invention, the problem of signal crosstalk on the circuit board of the existing group charging equipment can be relieved.

Description

[0001] This application claims the priority of a Chinese patent application with the application number 202421237536.0, titled "Switching Circuit for Group Charging Device, Group Charging Device", filed on May 31, 2024, the entire content of which is incorporated herein by reference. Technical Field

[0002] This application relates to electronic and electrical technologies, and particularly to a circuit board for a group charging device and a group charging device. Background Art

[0003] With the continuous development and application of new energy vehicle-related technologies, more and more vehicle devices powered by electricity have emerged in people's daily lives. Along with this, there is also an increasingly high demand for charging devices such as charging piles and charging stations. For example, in some usage scenarios, charging devices with single or double charging guns are already difficult to meet people's daily usage needs, making group charging devices with three or more charging guns a current research and development hotspot in this field.

[0004] One of the design difficulties of group charging devices lies in the topological structure of components and connection lines on the circuit board. For example, for a charging device with a single charging gun, the number of sensors and electronic switches is very small, so the circuit layout on the circuit board is relatively simple. However, for a group charging device, multiple sensors and electronic switches need to be configured for each charging gun and controlled by the same controller, which will make the layout of components and lines on the circuit board very complex and easily cause problems such as signal crosstalk like mutual interference between components or lines, bringing various safety hazards to the group charging device. Summary of the Invention

[0005] This application provides a circuit board for a group charging device and a group charging device, which can help alleviate the problem of signal crosstalk on the circuit board of existing group charging devices.

[0006] An embodiment of this application provides a circuit board for a group charging device, where the circuit board includes: a strip-shaped isolation area, and a first partition and a second partition separated on both sides of the strip-shaped isolation area; wherein,

[0007] The first partition includes a controller area for installing the controller of the group charging device;

[0008] The second partition includes a relay terminal area for installing a plurality of terminals for connecting the relays in the group charging device;

[0009] The strip isolation area includes an isolator area, and the isolator area includes at least two isolator mounting positions arranged along the extending direction of the strip isolation area. The isolator mounting positions are used for mounting isolators connected between the terminals of the controller and the relay. A connecting wire for connecting the first end of the isolator to the controller is provided in the first partition, and a connecting wire for connecting the second end of the isolator to the terminal is provided in the second partition.

[0010] In some possible implementation manners, the at least two isolator mounting positions include an isolation chip mounting position and a plurality of optocoupler chip mounting positions arranged in sequence along the extending direction of the strip isolation area.

[0011] In some possible implementation manners, on the front side of the circuit board, the strip isolation area includes an isolation chip mounting position and twelve optocoupler chip mounting positions arranged in sequence along the extending direction of the strip isolation area. On the back side of the circuit board, the strip isolation area includes six optocoupler chip mounting positions arranged in sequence along the extending direction of the strip isolation area.

[0012] In some possible implementation manners, on the front side of the circuit board, the second partition further includes a first shift register chip area and an H-bridge chip area. The first shift register chip area, the H-bridge chip area, and the relay terminal area are arranged in sequence along the direction away from the strip isolation area. On the front side of the circuit board, the first partition further includes an indicator light area, a communication terminal area, and a power supply area. The controller area, the communication terminal area, and the power supply area are all located on the side of the indicator light area away from the strip isolation area. The controller area, the communication terminal area, and the power supply area are arranged in sequence along the extending direction of the strip isolation area. The controller area and the power supply area are respectively located on opposite sides of the same surface of the circuit board. On the back side of the circuit board, the first partition further includes a second shift register chip area.

[0013] In some possible implementation manners, the first shift register chip area includes nine shift register chip mounting positions arranged along the extending direction of the strip isolation area. The H-bridge chip area includes eighteen H-bridge chip mounting positions arranged along the extending direction of the strip isolation area. The relay terminal area includes two rows of six wiring ports arranged along the extending direction of the strip isolation area. The second shift register chip area includes nine shift register chip mounting positions arranged along the extending direction of the strip isolation area.

[0014] In some possible implementation manners, the at least two isolator mounting positions are all located on the front side of the circuit board, and the at least two isolator mounting positions include two isolation chip mounting positions arranged in sequence along the extending direction of the strip-shaped isolation area.

[0015] In some possible implementation manners, on the front side of the circuit board, the second partition further includes a first shift register chip area, an H-bridge chip area, and an indicator light area, and the indicator light area, the first shift register chip area, the H-bridge chip area, and the relay terminal area are arranged in sequence along the direction away from the strip-shaped isolation area;

[0016] On the front side of the circuit board, the first partition further includes a communication terminal area and a power supply area. The controller area, the communication terminal area, and the power supply area are arranged in sequence along the extending direction of the strip-shaped isolation area, and the controller area and the power supply area are respectively located on opposite sides of the same surface of the circuit board;

[0017] On the back side of the circuit board, the second partition further includes a second shift register chip area.

[0018] In some possible implementation manners, the first shift register chip area includes nine shift register chip mounting positions arranged in sequence along the extending direction of the strip-shaped isolation area, the H-bridge chip area includes eighteen H-bridge chip mounting positions arranged in sequence along the extending direction of the strip-shaped isolation area, the relay terminal area includes six wiring ports arranged in two rows along the extending direction of the strip-shaped isolation area, and the second shift register chip area includes nine shift register chip mounting positions arranged in sequence along the extending direction of the strip-shaped isolation area.

[0019] In some possible implementation manners, the strip-shaped isolation area traverses the front side and the back side of the circuit board along the long side direction of the circuit board.

[0020] The embodiment of the present application further provides a group charging device, and the group charging device is any one of the above-mentioned group charging devices, and the circuit board is arranged in the group charging device.

[0021] It can be seen that the circuit board of the embodiment of the present application includes a strip-shaped isolation area that divides the circuit board into a first partition (the area where the controller is located) and a second partition (the area where the relay terminals are located), and the strip-shaped isolation area includes at least two isolator mounting positions arranged along the extension direction of the strip-shaped isolation area, so that the isolator connected between the controller and the relay terminals can isolate the signals on both sides, and the components and circuits in the first partition are isolated from the components and circuits in the second partition in terms of area division. Therefore, the embodiment of the present application can reduce the signal crosstalk between the first partition and the second partition, which helps to alleviate the problem of signal crosstalk on the circuit board of the existing group charging device and improve the safety and reliability of the group charging device.

[0022] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is a schematic front view of a circuit board for a group charging device in an embodiment of the present application;

[0025] Figure 2 is a schematic back view of a circuit board for a group charging device in an embodiment of the present application;

[0026] Figure 3 is a schematic front view of another circuit board for a group charging device in an embodiment of the present application;

[0027] Figure 4 is a schematic back view of another circuit board for a group charging device in an embodiment of the present application;

[0028] Figure 5 is a structural block diagram of a switching circuit in a group charging device in an embodiment of the present application;

[0029] Figure 6 is a structural block diagram of a parallel signal converter in a switching circuit in an embodiment of the present application;

[0030] Figure 7 is a structural block diagram of a magnetic latching relay in a switching circuit in an embodiment of the present application;

[0031] Figure 8It is a schematic circuit diagram of an isolator in a switching circuit in an embodiment of the present application;

[0032] Figure 9 It is a structural block diagram of a switching circuit in another group charging device in an embodiment of the present application;

[0033] Figure 10 It is a structural block diagram of a serial signal converter in a switching circuit in an embodiment of the present application;

[0034] Figure 11 It is a structural block diagram of a group charging device in an embodiment of the present application. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0036] In the present application, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection, or an indirect connection through an intermediate medium, and it may be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0037] Figure 1 It is a schematic front view structure diagram of a circuit board for a group charging device in an embodiment of the present application; Figure 2 It is a schematic back view structure diagram of a circuit board for a group charging device in an embodiment of the present application. See Figure 1 and Figure 2, the strip isolation area A0 of the circuit board, and the first partition A1 and the second partition A2 separated on both sides of the strip isolation area A0 (as an example, the strip isolation area A0 runs across the front and back of the circuit board along the long side direction of the circuit board; in other examples, the way of setting the strip isolation area A0 to separate the first partition A1 and the second partition A2 can be referred to according to the isolation requirements in the embodiments of the present application). Among them, the first partition A1 includes a controller area 86, and the controller area 86 is used to install the controller of the group charging device; the second partition A2 includes a relay terminal area 81, and the relay terminal area 81 is used to install a plurality of terminals for connecting the relays in the group charging device; the strip isolation area A0 includes an isolator area 85, and the isolator area 85 includes a plurality of isolator installation positions arranged along the extension direction of the strip isolation area A0 (as an example, the isolator area 85 includes 1 isolation chip installation position and 12 optocoupler chip installation positions on the front side, and 6 optocoupler chip installation positions on the back side. Here, the isolation chip and the optocoupler chip belong to different types of isolators), and each isolator installation position is used to install an isolator connected between the controller and the terminal of the relay. A connection line for connecting the first end of the isolator to the controller is provided in the first partition A1, and a connection line for connecting the second end of the isolator to the terminal is provided in the second partition A2.

[0038] It can be seen that the layout of the circuit board in the embodiment of the present application enables the isolator connected between the controller and the relay terminal to isolate the signals on both sides, and the devices and lines in the first partition A1 are isolated from the devices and lines in the second partition A2 in terms of area division. Therefore, it can reduce the signal crosstalk between the first partition A1 and the second partition A2, which helps to alleviate the problem of signal crosstalk on the circuit board of the existing group charging device and improve the safety and reliability of the group charging device.

[0039] Figure 3 is a schematic diagram of the front structure of another circuit board for a group charging device in the embodiment of the present application; Figure 4 is a schematic diagram of the back structure of another circuit board for a group charging device in the embodiment of the present application. As another example of the above circuit board, see Figure 3 and Figure 4, the strip isolation area A0 of the circuit board, and the first partition A1 and the second partition A2 separated on both sides of the strip isolation area A0 (as an example, the strip isolation area A0 runs across the front and back of the circuit board along the long side direction of the circuit board). Among them, the first partition A1 includes a controller area 86, and the controller area 86 is used to install the controller of the group charging device; the second partition A2 includes a relay terminal area 81, and the relay terminal area 81 is used to install a plurality of terminals for connecting the relays in the group charging device; the strip isolation area A0 includes an isolator area 85, and the isolator area 85 includes two isolator mounting positions (both are isolation chip mounting positions) arranged along the extending direction of the strip isolation area A0, and each isolator mounting position is used to install an isolator (isolation chip) connected between the controller and the relay terminal. A connection line for connecting the first end of the isolator to the controller is provided in the first partition A1, and a connection line for connecting the second end of the isolator to the terminal is provided in the second partition A2.

[0040] It can be seen that the layout of the circuit board in the embodiment of the present application also enables the isolator connected between the controller and the relay terminal to isolate the signals on both sides, and the devices and circuits in the first partition A1 are isolated from the devices and circuits in the second partition A2 in terms of area division. Therefore, it is possible to reduce the signal crosstalk between the first partition A1 and the second partition A2, which helps to alleviate the problem of signal crosstalk on the circuit board of the existing group charging device and improve the safety and reliability of the group charging device.

[0041] See Figure 3 and Figure 4 , in addition to the relay terminal area 81 in the above-mentioned second partition A2, it also includes an H-bridge chip area 82, a first shift register chip area 831, and an indicator light area 84. Among them, the indicator light area 84, the first shift register chip area 831, the H-bridge chip area 82, and the relay terminal area 81 are arranged in sequence along the direction away from the strip isolation area A0. Figure 1 and Figure 2 The second partition A2 in also includes a first shift register chip area 831, an H-bridge chip area 82, and a relay terminal area 81 arranged in sequence along the direction away from the strip isolation area A0, but the above-mentioned indicator light area 84 is arranged at a position close to the strip isolation area A0 in the first partition A1. See Figures 1 to 4 , the relay terminal area 81 includes a plurality of wiring ports (each wiring port includes a plurality of terminals and corresponds to a charging gun); in one example, see Figures 1 to 4, multiple connection ports include 6 connection ports arranged in two rows along the extending direction of the strip isolation area (a total of 12 connection ports); the H-bridge chip area 82 includes multiple H-bridge chip mounting positions arranged along the extending direction of the strip isolation area A0 (taking 18 H-bridge chip mounting positions as an example), the first shift register chip area 831 includes multiple shift register chip mounting positions arranged along the extending direction of the strip isolation area A0 (taking 9 shift register chip mounting positions as an example), and the indicator light area 84 includes multiple indicator light mounting positions arranged along the extending direction of the strip isolation area A0. Refer to Figures 1 to 4 , the above-mentioned first partition A1 further includes a communication terminal area 87 and a power supply area 88. The controller area 86, the communication terminal area 87, and the power supply area 88 are arranged in sequence along the extending direction of the strip isolation area A0, and the controller area 86 and the power supply area 88 are respectively located on opposite sides of the same surface of the circuit board (taking the controller area 86 and the power supply area 88 as an example and being located on the left and right sides of the circuit board in the figure). In this way, the low-frequency high-voltage electrical signals in the power supply area 88 can be minimized from interfering with the high-frequency low-voltage electrical signals in the controller area 86.

[0042] In addition, refer to Figure 2 and Figure 4 , the back surfaces of both types of circuit boards include a second shift register chip area 832, and the second shift register chip area 832 includes multiple shift register chip mounting positions arranged along the extending direction of the strip isolation area A0 ( Figure 2 and Figure 4 take 9 shift register chip mounting positions as an example. The difference is that Figure 2 in Figure 4 , the second shift register chip area 832 is located in the first partition A1, while Figure 4 in

[0043] it is necessary to note that in the above two different circuit board examples, Figure 1 and Figure 2 , the isolator in the circuit board shown can, for example, adopt a digital isolator chip and 18 chips including optocouplers (referred to as optocoupler chips), while Figure 3 and Figure 4 , the isolator in the circuit board shown can, for example, adopt 2 digital isolator chips with more pins than optocoupler chips; when achieving the same signal isolation function, the former example can make the connection lines on both sides of the strip isolation area A0 distribute more evenly along its extending direction, thereby alleviating problems such as increased signal crosstalk, increased line resistance, and increased short-circuit risk caused by overly dense wiring, while the latter example can reduce the number of chips required to implement the isolator, helping to simplify the device layout design and the circuit board manufacturing process.

[0044] Figure 5 is a structural block diagram of a switching circuit in a group charging device in an embodiment of the present application. The above circuit board installed with all corresponding devices can be used to implement the function of the switching circuit. Refer to Figure 5 , the switching circuit 10 includes a plurality of magnetic latching relays 11, a parallel signal converter 12, an isolator 13, and a controller 14, where: each magnetic latching relay 11 has two control terminals, and the magnetic latching relay 11 is configured to switch the switch state according to the signal levels on the two control terminals; the parallel signal converter 12 has a serial input terminal and a plurality of parallel output terminals, and the two control terminals of each magnetic latching relay 11 are respectively connected to two parallel output terminals of the parallel signal converter 12; the output terminal of the isolator 13 is connected to the serial input terminal of the parallel signal converter 12; the controller 14 has a serial signal output terminal, and the serial signal output terminal of the controller 14 is connected to the input terminal of the isolator 13.

[0045] In an example, the above switching circuit is applied to a group charging device with no less than three charging guns. The above magnetic latching relays can be arranged, for example, in the charging current path of each charging gun to turn on or off the charging current path, and can also be arranged, for example, between the positive voltage output terminals of two charging guns to change the charging mode of the group charging device, and is not limited thereto.

[0046] It can be understood that if two or more magnetic latching relays 11 are correspondingly arranged for each charging gun, then in order to safely and independently control the switch state of each magnetic latching relay 11, in the related art, generally, the two control terminals of each magnetic latching relay 11 need to be respectively connected to a signal output terminal of the controller 14. Assuming the number of charging guns is M and N magnetic latching relays 11 are correspondingly arranged for each charging gun, then 2*M*N signal output terminals of the controller 14 need to be occupied. When M = 6 and N = 6, 72 signal output terminals of the controller 14 need to be occupied. It is very difficult for a current single chip to achieve such a large amount of parallel signal output, so there will be a problem of having to increase the number of chips and control levels in the group charging device, which greatly increases the design, manufacturing, and popularization difficulties of the group charging device.

[0047] In the switch circuit of the embodiment of the present application, the serial signal output terminal of the controller 14 is connected to a plurality of magnetic latching relays 11 through an isolator 13 and a parallel signal converter 12, so that the signal level for controlling the switch state of each magnetic latching relay 11 can be provided by one serial signal output terminal of the controller 14 through serial-to-parallel conversion, which can greatly reduce the wiring, the number of pins of the control chip, and the number of control chips required to achieve parallel control of multiple magnetic latching relays 11. Thus, the embodiment of the present application can help reduce the wiring, the number of pins of the control chip, and the number of control chips in the control circuit corresponding to multiple charging guns in the group charging device, thereby helping to solve the problem that the internal control structure of the existing group charging device is too complex to implement, contributing to reducing the design, manufacturing, and popularization difficulties of the group charging device, and realizing a group charging device with a higher degree of integration.

[0048] Figure 6 is a structural block diagram of a parallel signal converter in a switch circuit in an embodiment of the present application. Refer to Figure 6 , the parallel signal converter 12 includes at least two shift register chips (both shift register chips in the first shift register chip area 831 and the second shift register chip area 832 on the circuit board), each shift register chip having an input terminal S1, a plurality of output terminals Q1, Q2,..., Qn, and a cascade terminal SQ, where: the input terminal SI of the first-stage shift register chip among the at least two shift register chips is connected to the serial input terminal DI of the parallel signal converter 12, the input terminal SI of each stage of shift register chip other than the first stage is connected to the cascade terminal SQ of the previous-stage shift register chip, and the plurality of output terminals Q1, Q2,..., Qn of each stage of shift register chip are respectively connected to a parallel output terminal of the parallel signal converter 12. Based on the above circuit structure, the circuit function of the above parallel signal converter 12 can be realized by means of a multi-stage cascaded shift register chip - the basic function of the shift register chip is to shift the internally stored level bit by bit along with the clock signal. Therefore, when a serial signal is input at the input terminal SI, after shifting through n levels along with the clock, n-bit data levels are respectively output at the plurality of output terminals Q1, Q2,..., Qn, thus realizing the function of the parallel signal converter; when the cascade terminal SQ of the shift register chip is connected to the input terminal SI of the next-stage shift register chip, the two shift register chips form a cascade connection, so that the functions of two shift register chips each having n output terminals are equivalent to the function of a shift register chip having 2n output terminals.

[0049] Refer to Figure 1 , Figure 2 and Figure 7, within the first shift register chip area 831, there are multiple shift register chip mounting positions arranged along the extending direction of the strip isolation area A0. The shift register chips mounted on these shift register chip mounting positions form a parallel signal converter in the group charging device. Correspondingly, the connection lines in the second partition A2 for connecting the isolator to the connection terminals include: connection lines for connecting each connection terminal to a corresponding parallel output terminal of the parallel signal converter, and connection lines for connecting the serial input terminal of the parallel signal converter to the second end of the isolator; the connection lines in the first partition A1 for connecting the isolator to the controller include: connection lines for connecting the first end of the isolator to the serial signal output terminal of the controller. Moreover, in the second partition A2, there are also connection lines for implementing the following connection relationship in the parallel signal converter: the input terminal of the first-stage shift register chip forms the serial input terminal of the parallel signal converter, the input terminal of each stage of shift register chip except the first stage is connected to the cascade terminal of the previous-stage shift register chip, and the multiple output terminals of each stage of shift register chip respectively form a parallel output terminal of the parallel signal converter.

[0050] In some possible implementation manners, the number of charging guns in the group charging device is 6, the number of magnetic latching relays corresponding to each charging gun is 6, the number of magnetic latching relays in the switching circuit is 36, the number of output terminals of the shift register chip is 8, and the number of shift register chips in the parallel signal converter is 9. Thus, the above parallel signal converter can be implemented by 9 cascaded single-input 8-output shift register chips, and the function of each shift register chip can be fully utilized.

[0051] Figure 7 is a structural block diagram of a magnetic latching relay in a switching circuit in an embodiment of the present application. Refer to Figure 7 , the magnetic latching relay includes an H-bridge chip 111 and at least one relay element 112. Two input terminals A1, A2 of the H-bridge chip 111 are respectively connected to two control terminals of the magnetic latching relay 11, and two output terminals B1 of the H-bridge chip are respectively connected to the control signal input terminal and the control signal output terminal of at least one relay element 112. In one example, refer to Figure 7, the power supply terminal of the H-bridge chip 111 is connected to the first power supply voltage line V1, and the ground terminal of the H-bridge chip 111 is connected to the common circuit terminal, thereby providing a working voltage for the H-bridge chip 111; the two input terminals A1 and A2 of the H-bridge chip jointly control whether a predetermined voltage is output between the two output terminals B1 and B2 - when the input terminal A1 receives a high level and the input terminal A2 receives a low level, a predetermined voltage is output between the two output terminals B1 and B2, so that the excitation coil in each relay element 112 is energized, and thus the switch part in each relay element 112 is closed, and the entire magnetic latching relay is in the switch-on state; when the input terminal A1 receives a low level and the input terminal A2 receives a high level, a reverse predetermined voltage is output between the two output terminals B1 and B2, so that the excitation coil in each relay element 112 is reversely energized, and thus the switch part in each relay element 112 is disconnected, and the entire magnetic latching relay is in the switch-off state; when the two input terminals A1 and A2 receive a high level or a low level at the same time, the H-bridge chip 111 does not work, no voltage is output between the two output terminals B1 and B2, and the magnetic latching relay is in the power-off state and the switch part remains disconnected. Of course, in other examples, the magnetic latching relay can be of a type different from the above description, such as a normally closed magnetic latching relay (the switch component is closed when there is no power), etc., which will not be elaborated here.

[0052] See Figures 1 to 4 , in the above circuit board, the H-bridge chip 111 is installed on the H-bridge chip installation position in the H-bridge chip area 82, and a connection line for realizing the connection relationship between the above H-bridge chip and the shift register chip is provided at A2 in the above second partition; each relay element 112 is not arranged on the circuit board, but is connected to the corresponding relay terminal in the relay terminal area 81 through a circuit.

[0053] Figure 8 is the structural block diagram of an isolator in a switching circuit in an embodiment of the present application. See Figure 8 , the isolator 13 includes an optocoupler composed of a light-emitting element H1 and a light-receiving element H2, a first resistor R1 and a second resistor R2. The positive electrode of the light-emitting element H1 is connected to the first power supply voltage terminal of the isolator 13 through both ends of the first resistor R1 ( Figure 8 in the example, the first power supply voltage terminal of the isolator 13 is connected to the second power supply voltage line V2), the negative electrode of the light-emitting element H1 is connected to the input terminal of the isolator 13, and the first end of the light-receiving element H2 is connected to the second power supply voltage terminal of the isolator 13 through both ends of the second resistor R2 ( Figure 8In the example, the first power voltage terminal of the isolator 13 is connected to the first power voltage line V1, and the second terminal of the light-receiving element H2 is connected to the output terminal of the isolator 13. In one example, the first power voltage line V1 provides a digital power voltage of 3.3V, and the second power voltage line V2 provides an analog power voltage of 12V. Thus, when the input terminal of the isolator 13 is at a low level, the light-emitting element H1 conducts and emits light, the light-receiving element H2 is turned on, and the output terminal of the isolator 13 outputs a low level; when the input terminal of the isolator 13 is at a high level, the light-emitting element H1 is turned off, the light-receiving element H2 is turned off, and the output terminal of the isolator 13 outputs a high level. In Figure 1 and Figure 2 each chip installed in each isolator installation position may include a circuit structure as shown in Figure 8 shown.

[0054] Figure 9 FIG. Figure 9 is a structural block diagram of a switching circuit in another group charging device in an embodiment of the present application. The above circuit board installed with all corresponding devices can be used to implement the function of the switching circuit. Refer to

[0055] In one example, the above switching circuit is applied to a group charging device having no less than three charging guns. The above switching detector may include, for example, an auxiliary contact switch of a relay and is used to detect the switching state of the relay. In one example, the switching detector includes an auxiliary contact switch disposed in the relay, one end connected to a low-level voltage, and the other end connected to the input terminal of the isolator. Thus, when the auxiliary contact switch is closed, the isolator outputs a low level, and when the auxiliary contact switch is open, the isolator outputs a high level, so as to realize the detection of the switching state of the relay. The relay corresponding to the switching detector may be, for example, a relay disposed on the charging current path of the charging gun or a relay disposed between the positive voltage output terminals of two charging guns, and is not limited thereto.

[0056] It can be understood that if each charging gun is correspondingly provided with two or more switch detectors 21, then in order to safely and independently collect the switch state levels of each switch detector 21, in the related art, generally, the switch state level output terminals of each switch detector 21 need to be respectively connected to a signal input terminal of the controller 14. Assuming the number of charging guns is M and each charging gun is correspondingly provided with P switch detectors 21, M*P signal input terminals of the controller 14 need to be occupied. When M = 6 and P = 12, 72 signal input terminals of the controller 14 need to be occupied. It is difficult for the current single chip to achieve such a large amount of parallel signal input, so there will be problems of having to increase the number of chips and control levels in the group charging device, greatly increasing the design, manufacturing and popularization difficulties of the group charging device.

[0057] In the switch circuit of the embodiment of the present application, the switch state level output terminals of several switch detectors 21 are connected to the serial signal input terminal of the controller 24 through a serial signal converter 22 and an isolator 23, so that the switch state level of each switch detector 21 can be input to the serial signal input terminal of the controller 24 in a parallel-to-serial conversion manner, which can greatly reduce the wiring, the number of control chip pins and the number of control chips required to collect the switch state levels of multiple switch detectors 21; thus, the embodiment of the present application can help reduce the wiring, the number of control chip pins and the number of control chips in the control circuit corresponding to multiple charging guns in the group charging device, thereby helping to solve the problem that the internal control structure of the existing group charging device is too complex to be realized, contributing to reducing the design, manufacturing and popularization difficulties of the group charging device, and realizing a group charging device with a higher degree of integration.

[0058] Figure 10 It is a structural block diagram of a serial signal converter in a switch circuit according to an embodiment of the present application. Refer to Figure 10, the serial signal converter 22 includes at least two shift register chips. Each shift register chip has a plurality of input terminals D1, D2, …, Dn, an output terminal SO, and a cascade terminal SD. The output terminal SO of the last-stage shift register chip among the at least two shift register chips is connected to the serial output terminal DO of the serial signal converter 22. The output terminal SO of each stage of shift register chip except the last stage is connected to the cascade terminal SD of the next-stage shift register chip. The plurality of input terminals D1, D2, …, Dn of each stage of shift register chip are respectively connected to a parallel input terminal of the serial signal converter 22. Based on the above circuit structure, the circuit function of the above serial signal converter 22 can be realized by means of multiple-stage cascaded shift register chips. The basic function of the shift register chip is to shift the internally stored levels bit by bit along with the clock signal. Therefore, the output terminal SO can sequentially output the data levels on the plurality of input terminals D1, D2, …, Dn along with the clock, thus realizing the function of the above serial signal converter 22. When the cascade terminal SD of the shift register chip is connected to the output terminal SO of the previous-stage shift register chip, the two shift register chips form a cascade connection, so that the functions of two shift register chips each having n input terminals are equivalent to those of a shift register chip having 2n input terminals.

[0059] Referring to Figure 1 , Figure 2 and Figure 10 , the second shift register chip area 832 includes a plurality of shift register chip mounting positions arranged along the extension direction of the strip-shaped isolation area A0. The shift register chips mounted on these shift register chip mounting positions form the serial signal converter in the group charging device. Correspondingly, the connection lines in the first partition A1 for connecting the isolator to the controller include: a connection line for connecting the first end of the isolator to a corresponding parallel input terminal of the serial signal converter, and a connection line for connecting the serial output terminal of the serial signal converter to the serial input terminal of the controller. Moreover, in the second partition A2, there are also provided connection lines for realizing the following connection relationship in the serial signal converter: the output terminal of the last-stage shift register chip forms the serial output terminal of the serial signal converter, the output terminal of each stage of shift register except the last stage is connected to the cascade terminal of the next-stage shift register, and the plurality of input terminals of each stage of shift register respectively form a parallel input terminal of the serial signal converter.

[0060] In some possible implementation manners, the number of charging guns in the group charging device is six, the number of switch detectors 21 corresponding to each charging gun is twelve, the number of switch detectors 21 in the switch circuit 20 is seventy-two, the number of output terminals of the shift register chip is eight, and the number of shift register chips in the serial signal converter 22 is nine. Thus, the above-mentioned serial signal converter can be implemented by nine cascaded 8-input single-output shift register chips, and the functions of each shift register chip can be fully utilized.

[0061] It should be noted that the above are only optional embodiments of the present application, and the above-mentioned implementation manners can all be appropriately modified according to actual application requirements. For example, in any of the above circuit structures, any resistor can be implemented by multiple resistors having a series structure and / or a parallel structure, and any capacitor can be implemented by multiple capacitors having a series structure and / or a parallel structure.

[0062] Figure 11 is a structural block diagram of a group charging device in an embodiment of the present application. Refer to Figure 11 , the group charging device includes any of the above circuit boards, and the parts of the switch circuit 10 and the switch circuit 20 other than the relay elements and the switch detectors are all implemented by the circuit structure and connection lines of the above circuit board on which the corresponding devices are installed. In one example, the group charging device includes a charging pile and at least three charging guns respectively connected to the charging pile, the above circuit board is disposed in the charging pile, and the circuit board is respectively connected to the above at least three charging guns; in some examples, the switch detector 21 in the switch circuit 20 is correspondingly arranged with the magnetic latching relay 11 in the switch circuit 10, so that each switch detector 21 respectively detects the switch state of a relay unit 112; the above-mentioned controller 14 and the above-mentioned controller 24 are implemented by the same control chip installed in the controller area. Therefore, the switch control of the above-mentioned several magnetic latching relays 11 and the acquisition of the switch state levels of the above-mentioned several switch detectors 21 only need to occupy two signal input / output ports of the control chip to be realized. It can be seen that the embodiment of the present application can help reduce the wiring, the number of pins of the control chip, and the number of control chips in the control circuit corresponding to multiple charging guns in the group charging device, thereby helping to solve the problem that the internal control structure of the existing group charging device is too complex to be realized, contributing to reducing the design, manufacturing, and popularization difficulties of the group charging device, and realizing a group charging device with a higher degree of integration.

[0063] In addition, in the above switch circuit, the chip and related circuit structure for implementing the above controller are arranged in the controller area 86, the chip and related circuit structure for implementing the above isolator 13 are arranged in the isolator area 85, the related circuit structure for implementing the above serial signal converter is arranged in the second shift register chip area 832, the related circuit structure for implementing the above parallel signal converter is arranged in the first shift register chip area 831, the above H-bridge chip and its related circuits are arranged in the H-bridge chip area 82, and each relay unit is connected to its respective H-bridge chip through a terminal connected to a terminal within the relay terminal area 81; a circuit structure and connection terminals for providing power supply to other components are provided within the power supply area 88, a circuit structure and connection terminals for enabling data communication between the controller and the outside are provided within the communication terminal area 87, and the indicator lights within the indicator light area 84 can indicate the switch states of each relay unit through an appropriate connection relationship.

[0064] It can be seen that since the isolator area 85 separates the upper and lower areas of the circuit board to form electrical isolation, the mutual interference between these two circuit areas can be reduced.

[0065] It should be noted that the group charging device in the embodiments of the present application refers to a charging device having three or more charging guns, and its form can be, for example, a device including at least one of structures such as charging piles, charging boxes, charging stations, charging systems, charging circuit components, etc., and the embodiments of the present application do not limit this. One or more of the above controllers and control chips may include one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components. In addition, the above group charging device may also include only one of the above switch circuits 10 and 20, that is, only the structure corresponding to the above switch circuit 10 or the structure corresponding to the above switch circuit 20 is provided on the circuit board.

[0066] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A circuit board for a group charging device, characterized in that, The circuit board includes: a strip-shaped isolation area, and a first partition and a second partition separated on both sides of the strip-shaped isolation area; wherein, the first partition includes a controller area for installing a controller of the group charging device; the second partition includes a relay terminal area for installing a plurality of terminals for connecting relays in the group charging device; the strip-shaped isolation area includes an isolator area, and the isolator area includes at least two isolator mounting positions arranged along the extension direction of the strip-shaped isolation area. The isolator mounting positions are used for installing isolators connected between the controller and the terminals of the relay. A connecting line for connecting the first end of the isolator to the controller is provided in the first partition, and a connecting line for connecting the second end of the isolator to the terminal is provided in the second partition.

2. The circuit board according to claim 1, wherein, The at least two isolator mounting positions include an isolation chip mounting position and a plurality of optocoupler chip mounting positions arranged in sequence along the extension direction of the strip-shaped isolation area.

3. The circuit board according to claim 1, wherein The strip-shaped isolation area includes an isolation chip mounting position and twelve optocoupler chip mounting positions arranged in sequence along the extension direction of the strip-shaped isolation area on the front side of the circuit board, and the strip-shaped isolation area includes six optocoupler chip mounting positions arranged in sequence along the extension direction of the strip-shaped isolation area on the back side of the circuit board.

4. The circuit board according to claim 1, characterized in that, The second partition further includes a first shift register chip area and an H-bridge chip area on the front side of the circuit board. The first shift register chip area, the H-bridge chip area and the relay terminal area are arranged in sequence along the direction away from the strip-shaped isolation area; The first partition further includes an indicator light area, a communication terminal area and a power supply area on the front side of the circuit board. The controller area, the communication terminal area and the power supply area are all located on the side of the indicator light area away from the strip-shaped isolation area. The controller area, the communication terminal area and the power supply area are arranged in sequence along the extension direction of the strip-shaped isolation area. The controller area and the power supply area are respectively located on opposite sides of the same surface of the circuit board; The first partition further includes a second shift register chip area on the back side of the circuit board.

5. The circuit board according to claim 4, wherein, The first shift register chip area includes nine shift register chip mounting positions arranged along the extension direction of the strip-shaped isolation area. The H-bridge chip area includes eighteen H-bridge chip mounting positions arranged along the extension direction of the strip-shaped isolation area. The relay terminal area includes two rows of six connection ports arranged along the extension direction of the strip-shaped isolation area. The second shift register chip area includes nine shift register chip mounting positions arranged along the extension direction of the strip-shaped isolation area.

6. The circuit board according to claim 1, wherein The at least two isolator mounting positions are all located on the front side of the circuit board, and the at least two isolator mounting positions include two isolation chip mounting positions arranged in sequence along the extension direction of the strip-shaped isolation area.

7. The circuit board according to claim 1, wherein The second partition further includes a first shift register chip area, an H-bridge chip area, and an indicator light area on the front side of the circuit board. The indicator light area, the first shift register chip area, the H-bridge chip area, and the relay terminal area are arranged in sequence along the direction away from the strip isolation area; The first partition further includes a communication terminal area and a power supply area on the front side of the circuit board. The controller area, the communication terminal area, and the power supply area are arranged in sequence along the extension direction of the strip isolation area. The controller area and the power supply area are located on opposite sides of the same surface of the circuit board respectively; The second partition further includes a second shift register chip area on the back side of the circuit board.

8. The circuit board according to claim 7, wherein The first shift register chip area includes nine shift register chip mounting positions arranged along the extension direction of the strip isolation area. The H-bridge chip area includes eighteen H-bridge chip mounting positions arranged along the extension direction of the strip isolation area. The relay terminal area includes six wiring ports arranged in two rows along the extension direction of the strip isolation area. The second shift register chip area includes nine shift register chip mounting positions arranged along the extension direction of the strip isolation area.

9. The circuit board according to claim 1, characterized in that, The strip isolation area runs across the front and back sides of the circuit board along the long side direction of the circuit board.

10. A group charging device, characterized in that, The group charging device is the group charging device described in any one of claims 1 to 9, and the circuit board is arranged in the group charging device.

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