Modularized controller of direct-current charging pile

Abstract

The utility model aims to provide a direct current charging pile modular controller. The charging device comprises a charging gun unit, an alternating current input unit, a power distribution unit and a control unit, wherein the charging gun unit, the alternating current input unit and the power distribution unit are all connected with the control unit; the charging gun unit comprises a one-way output control module, a one-way state acquisition module, a one-way analog quantity acquisition module and a one-way communication module, the alternating current input unit comprises a one-way output control module, a one-way state acquisition module and a one-way analog quantity acquisition module, and the power distribution unit comprises a one-way output control module and a one-way state acquisition module. According to the configuration condition of the units, the output control module and the state acquisition module are integrally designed to be a 10-bit XH connector, the analog quantity acquisition module is designed to be a 4-bit XH connector, the communication module is designed to be a 2-bit XH connector, and standard prefabricated wire harnesses can be adopted for connection. The utility model is applied to the technical field of direct current charging pile control.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of direct current charging pile control, especially relates to a direct current charging pile modularization controller. BACKGROUND

[0002] The existing direct current charging pile controller scheme mainly has two kinds:

[0003] The first existing scheme is designed with charging guns as units, and each gun corresponds to a controller, and multiple gun systems are configured with multiple controllers to divide the system into charging units, main control units and monitoring units, and multiple controllers are connected using communication, and the most representative is that State Grid uses this scheme to form a standardized design in 2019 and has been used until now.

[0004] The second existing scheme is designed with cabinet systems as units, and one centralized controller is used for one cabinet system, and all analog signals, control signals, switch acquisition signals and communication signals are collected to the controller, and the representative is the charging internet-of-things control module of Southern Power Grid, which uses the module to realize the control of a single cabinet system.

[0005] In the first existing scheme, multiple controllers exist inside each direct current charging pile, for example, four controllers are needed for an integrated direct current charging pile, which can be handled when the system is not compact enough in the early stage of the development of charging piles in earlier years, and with the improvement of the power density of charging piles, there are four main problems:

[0006] 1. Space occupation is not conducive to cabinet system layout and affects system cost;

[0007] 2. Each controller needs to be designed with power supply, MCU and other devices, and the cost of the controller itself is high;

[0008] 3. Controllers interact with data through communication, which is easily affected by electromagnetic environment interference and needs to be improved in stability;

[0009] 4. The real-time performance is not strong through communication interaction data and control instructions, which affects the protection performance;

[0010] 5. The wiring of the system is relatively complex, the wire harness cost is high, and it is also not conducive to mass production.

[0011] The second existing scheme is a derivative product of the first existing scheme, considering the improvement of the compactness of the direct current charging pile product, multiple controller functions are integrated to form a centralized control, which solves the first four shortcomings mentioned in the first existing scheme and is the scheme commonly used at present, but the second existing scheme still has one problem unsolved, as follows:

[0012] The size of the integrated direct current charging pile is about 650*500*1700 (mm) at present, and the size is relatively large. The main problem of the current centralized control scheme is system wiring. Since the controller needs to monitor the AC side switch, the charging module, the direct current output loop and the charging gun and other equipment, the control signals, feedback signals, analog quantities and communication of these loops need to be connected to the controller for collection and judgment. The wire harness exists in the cabinet. In addition, the length of the wire harness is different, and batch production cannot be carried out in advance. When the actual cabinet system is wired, electric tools are used to wire in front of the cabinet. Since the whole process relies on manual operation, the batch production and consistency of the product increase the uncontrollable risk, which also causes the instability of the product and the increase of the production cost. Therefore, it is necessary to provide a direct current charging pile modular controller which is high in adaptability, can reduce the system wire harness cost, improve the production efficiency, reduce the maintenance cost and improve the system reliability. Practical new type content

[0013] The technical scheme adopted by the utility model is: the utility model discloses a charging gun unit, AC input unit, power distribution unit and control unit, the charging gun unit, the AC input unit, the power distribution unit all are connected with the control unit, the charging gun unit includes 1 way output control module, 1 way state acquisition module, 1 way analog quantity acquisition module and 1 way communication module, the AC input unit includes 1 way output control module, 1 way state acquisition module and 1 way analog quantity acquisition module, the power distribution unit includes 1 way output control module and 1 way state acquisition module.

[0014] The output control module and the state acquisition module are integrated and designed to be connected to 10 XH connectors, 3-way control and 4-way acquisition are carried out, the analog quantity acquisition module is connected to 4 XH connectors, 3-way analog quantity acquisition is carried out, and the communication module is connected to 2 XH connectors, 1-way communication connection is carried out.

[0015] From the above, according to the control and acquisition requirements of the above unit, the interfaces of the corresponding sub-modules and control are defined as three standard interfaces, as follows: control and state are 1 interface, 10 XH connectors are used, three-way control and four-way acquisition are realized, analog quantity is 1 interface, 4 XH connectors are used, three-way analog quantity acquisition is realized, and communication is 1 independent interface, 2 XH connectors are used, and 1-way communication connection is realized.

[0016] The application has the following advantages:

[0017] 1. Reduce the cost of system wiring harness: each sub-module and the corresponding functional unit is installed nearby, the input wiring harness of the functional unit is directly connected to the terminal of the sub-module, and after the combination of the sub-modules, it is connected to the controller through the standard wiring harness, reducing the system adapter terminal and adapter wiring harness, and reducing the cost of wiring harness;

[0018] 2. Improve production efficiency: standard wiring harness is used between the sub-modules and the controller, only insertion is needed, without wiring and wiring errors, which can reduce the production time of the cabinet system, reduce the probability of system wiring errors, and improve the production efficiency;

[0019] 3. Reduce maintenance cost: the sub-modules and the controller can be designed and used in combination, and the standardization and universality of the modules reduce the inventory cost and maintenance difficulty of spare parts;

[0020] 4. Improve system reliability: modular design improves the fault tolerance of the system, and the failure of a single module will not affect the normal operation of the entire system, and only the single module needs to be replaced during maintenance, which reduces the cost of the device during maintenance and replacement;

[0021] 5. Strong adaptability: when the product is upgraded, the functional sub-modules of the controller can be quickly adjusted and upgraded according to different charging requirements and environmental changes.

[0022] One preferred scheme is that the direct current charging pile modular controller is applied to three kinds of cabinet systems, including an integrated charging machine, a split type main machine and a split type terminal, the integrated charging machine includes a charging module unit, a man-machine interaction unit, an in-cabinet environment unit, the control unit, the power distribution unit, the alternating current input unit and two groups of the charging gun units, the charging module unit is connected with the control unit through CAN, the man-machine interaction unit is connected with the control unit through RS232, and the in-cabinet environment unit, the power distribution unit, the alternating current input unit and two groups of the charging gun units are connected with the control unit.

[0023] One preferred scheme is that the split type main machine includes the charging module unit, the in-cabinet environment unit, the control unit, the power distribution unit and two groups of the alternating current input unit, the charging module unit is connected with the control unit through CAN, the power distribution unit is connected with the control unit through CAN, and the in-cabinet environment unit and two groups of the alternating current input unit are connected with the control unit.

[0024] One preferred scheme is that the split type terminal includes the in-cabinet environment unit, the man-machine interaction unit and two groups of the charging gun units, the man-machine interaction unit is connected with the control unit through RS232, and the in-cabinet environment unit and two groups of the charging gun units are connected with the control unit.

[0025] In a preferred embodiment, the output control module controls three channels, including an auxiliary power supply, an electromagnetic lock, and an output contactor; the status acquisition module acquires three channels, including the status of the auxiliary power supply, the status of the electromagnetic lock, and the status of the output contactor; the analog signal acquisition module acquires three channels, including a guide signal, a positive electrode temperature, and a negative electrode temperature; and the communication module acquires one channel, which is a CAN signal.

[0026] A preferred embodiment is that the output control module controls 3 channels, including fan control, molded case circuit breaker tripping, and AC contactor control; the status acquisition module acquires 4 channels, including fan speed, circuit breaker status, AC contactor status, and surge arrester status; and the analog quantity acquisition module acquires 2 channels, including inlet air temperature and outlet air temperature.

[0027] In a preferred embodiment, the output control module controls three channels, which include a first-stage contactor, a second-stage contactor, and a third-stage contactor. The status acquisition module acquires three channels, which include feedback from the first-stage contactor, feedback from the second-stage contactor, and feedback from the third-stage contactor. Attached Figure Description

[0028] Figure 1 This is an architecture diagram of the control unit;

[0029] Figure 2 This is an architectural diagram of the integrated charger.

[0030] Figure 3 This is an architecture diagram of the split-type host;

[0031] Figure 4 This is an architecture diagram of the split-type terminal;

[0032] Figure 5 Here is a table of interface requirements for the three cabinet systems: Detailed Implementation

[0033] like Figure 1 As shown, in this embodiment, the present invention includes a charging gun unit 1, an AC input unit 2, a power distribution unit 3, and a control unit 4. The charging gun unit 1, the AC input unit 2, and the power distribution unit 3 are all connected to the control unit 4. The charging gun unit 1 includes one output control module, one status acquisition module, one analog quantity acquisition module, and one communication module. The AC input unit 2 includes one output control module, one status acquisition module, and one analog quantity acquisition module. The power distribution unit 3 includes one output control module and one status acquisition module.

[0034] The output control module and the state acquisition module are integrally designed and connected to a 10-bit XH connector, and 3-way control and 4-way acquisition are performed; the analog quantity acquisition module is connected to a 4-bit XH connector, and 3-way analog quantity acquisition is performed; the communication module is connected to a 2-bit XH connector, and 1-way communication connection is performed.

[0035] The AC input unit 2 mainly controls and acquires the AC loop of the system, including the molded case circuit breaker state, the lightning arrester state, the AC contactor control and feedback, the cooling fan control and feedback, and the inlet and outlet air temperature signals.

[0036] The charging gun unit 1 internally includes the output contactor control and feedback corresponding to the gun, the auxiliary power supply control and feedback, the electromagnetic lock control and feedback, the guide signal, the charging gun temperature signal, and the BMS communication signal, and the number thereof corresponds to the number of gun ports of the system configuration; the power distribution unit 3: since the integrated charger has a small number of gun ports, generally 2 guns, the power distribution unit thereof is generally controlled by a controller, and the split machine has a large number of gun ports, and the power distribution scheme is complex, and needs to be controlled by an independent control board, and the controller is communicated through communication, and the current control mode of the integrated charger mainly adopts a four-section bus scheme, and three groups of cascaded contactors are controlled and fed back; the control unit 4 completes data acquisition and control of each unit of the product.

[0037] In the system layout, the sub-modules can be arranged near the corresponding units, connected through a standard plug-in wire harness and a controller, and compared with the second existing scheme of the background technology, the wire harness from each unit to the controller can be greatly reduced, and since the sub-modules and the controller adopt a standard interface, a standard wire harness can be prefabricated, rapid plugging can be realized, the speed of batch production can be improved, the complexity of wiring can be reduced, and the system failure rate can be reduced.

[0038] As shown in Figure 2 In the embodiment, the DC charging pile modularized controller is applied to three cabinet systems, the three cabinet systems include an integrated charger, a split main machine, and a split terminal, the integrated charger includes a charging module unit 5, a man-machine interaction unit 6, a cabinet environment unit 7, the control unit 4, the power distribution unit 3, the AC input unit 2, and two groups of the charging gun unit 1, the charging module unit 5 is connected with the control unit 4 through CAN, the man-machine interaction unit 6 is connected with the control unit 4 through RS232, and the cabinet environment unit 7, the power distribution unit 3, the AC input unit 2, and the two groups of the charging gun unit 1 are connected with the control unit 4.

[0039] The charging module unit 5 mainly refers to the module that realizes energy conversion, mainly the A-CDC conversion module, which converts AC power into DC power to charge the vehicle, and communicates with the controller; the human-machine interface unit 6 includes signals such as display screen communication, card reader communication, and indicator light control; the cabinet environment unit 7 includes emergency stop signal, door control signal, water immersion signal, and tilting signal light.

[0040] like Figure 3 As shown, in this embodiment, the split-type host includes the charging module unit 5, the cabinet environment unit 7, the control unit 4, the power distribution unit 3, and two sets of AC input units 2. The charging module unit 5 is connected to the control unit 4 via CAN, the power distribution unit 3 is connected to the control unit 4 via CAN, and the cabinet environment unit 7 and the two sets of AC input units 2 are all connected to the control unit 4.

[0041] like Figure 4 As shown, in this embodiment, the split terminal includes the cabinet environment unit 7, the human-machine interface unit 6, and two sets of charging gun units 1. The human-machine interface unit 6 is connected to the control unit 4 via RS232, and the cabinet environment unit 7 and the two sets of charging gun units 1 are all connected to the control unit 4.

[0042] like Figures 1 to 4 As shown, in this embodiment, the output control module controls three channels, including an auxiliary power supply, an electromagnetic lock, and an output contactor; the status acquisition module acquires three channels, including the status of the auxiliary power supply, the status of the electromagnetic lock, and the status of the output contactor; the analog quantity acquisition module acquires three channels, including the guidance signal, the positive electrode temperature, and the negative electrode temperature; and the communication module acquires one channel, which is CAN.

[0043] like Figures 1 to 4 As shown, in this embodiment, the output control module controls 3 channels, including fan control, molded case circuit breaker tripping, and AC contactor control. The status acquisition module acquires 4 channels, including fan speed, circuit breaker status, AC contactor status, and surge arrester status. The analog quantity acquisition module acquires 2 channels, including inlet air temperature and outlet air temperature.

[0044] like Figures 1 to 4 As shown, in this embodiment, the output control module controls three channels, which include a first-stage contactor, a second-stage contactor, and a third-stage contactor. The status acquisition module acquires three channels, which include feedback from the first-stage contactor, feedback from the second-stage contactor, and feedback from the third-stage contactor.

[0045] like Figures 1 to 5As shown, in the embodiment, the control and collection requirements of the above-mentioned units are integrated, three standard interfaces are defined for the interfaces of corresponding sub-modules and control, one interface is defined for control and state, a 10-bit XH connector is used to realize three-way control and four-way collection; one interface is defined for analog quantity, a 4-bit XH connector is used to realize three-way analog quantity collection; one independent interface is defined for communication, a 2-bit XH connector is used to realize one-way communication connection; the interface definitions of the charging gun unit 1, the alternating current input unit 2 and the power distribution unit 3 are consistent, the control functions can be distinguished through software options, four control and state interfaces, three analog quantity interfaces and two communication interfaces of the whole controller can completely cover the control requirements of three kinds of cabinet systems, namely, integrated charging machine, split type main machine and split type terminal, Figure 5 for the requirements of three kinds of cabinet systems for interfaces.

[0046] In the embodiment, due to the limitation of parking space distance, the number of charging guns of most direct current charging products on the market is 2 or less, so that the equipment can cover the corresponding vehicles for charging. Figures 1 to 5 As shown, the functions of the integrated machine are the most complete; the main machine of the split machine mainly realizes the functions of energy conversion and power distribution, and does not have a charging gun and a man-machine interaction unit, and due to the large power, some products are configured with two-way line switches; the terminal of the split machine is used in combination with the main machine, has a man-machine interaction unit and a charging gun unit, and each cabinet system has a cabinet environment unit.

[0047] From the perspective of product design, the product needs to adapt to as many scenes as possible, and the batch degree of the product needs to be increased, so that the cost of the product can be better optimized, and the controller mentioned in the application needs to meet the control system requirements of three products, namely, integrated machine, split type main machine and split type terminal, so that one product meets the requirements of multiple applications.

[0048] In the design of the controller, the centralized design idea of the second existing scheme in the background technology is used to centrally design the core functions of the controller, including power supply, MCU, memory, communication circuit, analog quantity collection, control current and collection circuit, and according to the analysis of the product architecture, the charging gun unit, the alternating current input unit and the power distribution unit are modularly designed, the control devices are separated from the controller, the sub-modules are designed in the form of sub-modules, and the sub-modules realize the control and feedback in the unit.

[0049] Although the embodiments of the utility model are described in actual schemes, but does not constitute the limitation to the meaning of the utility model, for the person skilled in the art, according to the modification of the embodiments and the combination with other schemes in the specification, it is obvious.

Claims

1. A DC charging post modular controller, characterized in that: It includes charging gun unit (1), AC input unit (2), power distribution unit (3) and control unit (4), the charging gun unit (1), the AC input unit (2), the power distribution unit (3) are connected with the control unit (4);The charging gun unit (1) includes 1 way output control module, 1 way state acquisition module, 1 way analog quantity acquisition module and 1 way communication module, the AC input unit (2) includes 1 way output control module, 1 way state acquisition module and 1 way analog quantity acquisition module, the power distribution unit (3) includes 1 way output control module and 1 way state acquisition module; The output control module and the state acquisition module are commonly connected to 10 XH connectors, and 3-way control and 4-way acquisition are carried out;The analog quantity acquisition module is connected to 4 XH connectors, and 3-way analog quantity acquisition is carried out; The communication module is connected to 2 XH connectors, and 1-way communication connection is carried out.

2. The DC charging pile modular controller according to claim 1, characterized in that: The DC charging pile modular controller is applied to three kinds of cabinet systems, the three kinds of cabinet systems include integrated charger, split type main machine and split type terminal, the integrated charger includes charging module unit (5), man-machine interaction unit (6), cabinet environment unit (7), the control unit (4), the power distribution unit (3), the AC input unit (2), two groups of the charging gun unit (1), the charging module unit (5) is connected with the control unit (4) through CAN, the man-machine interaction unit (6) is connected with the control unit (4) through RS232, the cabinet environment unit (7), the power distribution unit (3), the AC input unit (2), two groups of the charging gun unit (1) are connected with the control unit (4).

3. The DC charging pile modularized controller according to claim 2, characterized in that: The split type main machine includes the charging module unit (5), the cabinet environment unit (7), the control unit (4), the power distribution unit (3), two groups of the AC input unit (2), the charging module unit (5) is connected with the control unit (4) through CAN, the power distribution unit (3) is connected with the control unit (4) through CAN, the cabinet environment unit (7), two groups of the AC input unit (2) are connected with the control unit (4).

4. The DC charging pile modular controller according to claim 2, characterized in that: The split type terminal includes the cabinet environment unit (7), the man-machine interaction unit (6), two groups of the charging gun unit (1), the man-machine interaction unit (6) is connected with the control unit (4) through RS232, the cabinet environment unit (7), two groups of the charging gun unit (1) are connected with the control unit (4).

5. The DC charging pile modular controller according to claim 1, characterized in that: The output control module controls 3 ways, 3 ways include auxiliary power supply, electromagnetic lock and output contactor, the state acquisition module acquires 3 ways, 3 ways include auxiliary source state, electromagnetic lock state and output contactor state, the analog quantity acquisition module acquires 3 ways, 3 ways include guide signal, positive temperature and negative temperature, the communication module acquires 1 way, 1 way is CAN.

6. The DC charging pile modular controller according to claim 1, characterized in that: The output control module controls 3 paths, the 3 paths include fan control, molded case circuit breaker tripping and AC contactor control, the state acquisition module acquires 4 paths, the 4 paths include fan speed, circuit breaker state, AC contactor state and lightning arrester state, the analog quantity acquisition module acquires 2 paths, the 2 paths include inlet air side temperature and outlet air side temperature.

7. The DC charging pile modular controller according to claim 1, characterized in that: The output control module controls 3 paths, the 3 paths include 1st contactor, 2nd contactor and 3rd contactor, the state acquisition module acquires 3 paths, the 3 paths include 1st contactor feedback, 2nd contactor feedback and 3rd contactor feedback.

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