Alternating-current and direct-current integrated charging system

Abstract

Disclosed in the present application is an alternating-current and direct-current integrated charging system. The system comprises an alternating-current charging device or a direct-current charging device, an adapter plug, a cable, a charging gun, a direct-current charging socket and a traction battery, wherein an alternating-current plug is plugged into an alternating-current interface of the adapter plug, and a direct-current plug is connected to a direct-current interface of the adapter plug; an output end of an alternating-current terminal is connected to an output end of a direct-current terminal to form a common output end, and the common output end is then sequentially connected to the charging gun, the direct-current charging socket and the traction battery by means of the cable; the charging gun is integrated with a control module, a current identification module, a direct-current management unit and an alternating-current-to-direct-current conversion management unit; and the control module executes an alternating-current charging mode or a direct-current charging mode on the basis of a current waveform acquired at the common output end by the current identification module.

Description

An AC / DC integrated charging system

[0001] Related applications

[0002] This application claims priority to the Chinese utility model patent application with application number 202322294820.3 filed on August 25, 2023, and cites the entire contents disclosed in the above patent application as part of this application. Technical Field

[0003] The present application relates to the technical field of automobile connectors, and in particular to an AC / DC integrated charging system. Background Art

[0004] With the rapid development of new energy technologies, electric vehicles are becoming increasingly popular. Currently, charging equipment on the market includes DC and AC charging guns. However, the charging ports that match these guns have various charging interface standards, such as national, European, or American standards. Furthermore, there are DC and AC charging ports. Therefore, to accommodate these multiple charging interfaces, electric vehicle charging ports typically have both integrated AC and DC ports. The AC and DC ports, respectively, use cables to connect the charger to the vehicle battery. Due to the high charging current, the charging harness cables are also thicker, and the number of accessories used to assist assembly is also high, significantly increasing the weight and cost of the harness.

[0005] Therefore, a new technical solution is urgently needed to solve the above problems.

[0006] Summary of the Invention

[0007] The purpose of this application is to provide an integrated AC / DC charging system to reduce the types of vehicle charging interfaces and save a charging gun, and to reduce the amount of charging harnesses and the number of accessories on the harnesses, thereby reducing costs.

[0008] The present application provides an AC / DC integrated charging system, including an AC charging device or a DC charging device, a conversion plug, a cable, a charging gun, a DC charging stand, and a power battery;

[0009] The AC charging device includes an AC plug, the DC charging device includes a DC plug, the conversion plug includes an AC interface and a DC interface, the AC plug is plugged into the AC interface of the conversion plug, and the DC plug is plugged into the DC interface of the conversion plug, the AC interface is provided with at least one AC terminal for receiving AC power, and the DC interface is provided with at least one DC terminal for receiving DC power, the output end of the AC terminal and the output end of the DC terminal are respectively connected to form a common output end, the common output end is connected to the input end of the charging gun through the cable, the output end of the charging gun is detachably electrically connected to the input end of the DC charging base, and the output end of the DC charging base is connected to the input end of the power battery;

[0010] The charging gun is integrated with a control module, a current identification module, a DC management unit and an AC to DC management unit.

[0011] The control module is configured to obtain the current waveform of the common output terminal by the current identification module, and execute an AC charging mode or a DC charging mode according to the current waveform, wherein the AC charging mode or the DC charging mode is to power the power battery after converting the power into DC power by the AC-DC management unit or to power the power battery through the DC management unit.

[0012] Optionally, the AC terminal includes an AC negative terminal, an AC PE terminal and an AC positive terminal, and the DC terminal includes a DC negative terminal, a DC PE terminal and a DC positive terminal. The output end of the AC positive terminal is transferred to the output end of the DC positive terminal through a first transfer structure, the output end of the AC negative terminal is transferred to the output end of the DC negative terminal through a second transfer structure, and the output end of the AC PE terminal is transferred to the output end of the DC PE terminal through a third transfer structure. The output end of the DC positive terminal, the output end of the DC negative terminal and the output end of the DC PE terminal together form the common output end.

[0013] Optionally, the first adapter structure, the second adapter structure, and the third adapter structure are any one or a combination of adapter bars or adapter lines.

[0014] Optionally, the AC terminal includes an AC negative terminal, an AC PE terminal and an AC positive terminal, and the DC terminal includes a DC negative terminal, a DC PE terminal and a DC positive terminal. The output end of the AC positive terminal and the output end of the DC positive terminal are connected through a first output structure, the output end of the AC negative terminal and the output end of the DC negative terminal are connected through a second output structure, and the output end of the AC PE terminal and the DC PE terminal are connected through a third output structure. The first output structure, the second output structure and the third output structure together form the common output end.

[0015] Optionally, the first output structure, the second output structure, and the third output structure are any one or a combination of a patch bar or a patch cord.

[0016] Optionally, the common output end is connected to the input end of the current identification module, the output end of the current identification module is connected to the input end of the control module, the DC management unit is connected in parallel with the AC-to-DC management unit, the output end of the control module is respectively connected to the input ends of the DC management unit and the AC-to-DC management unit, and the output end of the DC management unit or the output end of the AC-to-DC management unit is connected to the input end of the DC charging socket.

[0017] Optionally, a high-voltage distribution unit and a BMS are connected in series between the DC charging station and the power battery.

[0018] Optionally, the AC-DC management unit is integrated with a rectifier and converts the AC power output from the common output terminal into DC power through the rectifier.

[0019] Optionally, the output end of the high voltage distribution unit is also connected to a DC converter, a heater and an air conditioning system.

[0020] Optionally, the output end of the high-voltage distribution unit is connected to the DC converter, the heater and the air-conditioning system through a busbar and a wiring harness.

[0021] Optionally, the high voltage distribution unit further includes an overload protection circuit.

[0022] Beneficial effects of this application:

[0023] The output end of the AC terminal in the AC interface of the conversion plug of the present application and the output end of the DC terminal in the DC interface are respectively connected to form a common output end, and the common output end is connected to the charging gun, the DC charging seat and the power battery in sequence through cables, thereby eliminating the output cable of the AC terminal output end or the DC terminal output end, and only connecting the cable at the common output end. The AC and DC are on the same line, the AC interface of the charging seat is eliminated, and only the DC charging seat is used, which reduces the amount of charging harness and the number of all harness accessories such as cable ties, tapes, brackets, etc. used for the charging harness, greatly reducing the cost. Because the present application only requires one charging gun, an AC charging gun or a DC charging gun is saved, thereby reducing the cost and making the overall connection simpler; and the charging gun is integrated with a control module, a current identification module, a DC management unit and an AC to DC management unit. The charging gun can obtain the current waveform of the common output end according to the current identification module and execute the AC charging mode or the DC charging mode. The charging gun has a two-in-one charging management function of DC charging management and AC charging management.

[0024] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0026] FIG1 is a block diagram of the structural principle of an AC / DC integrated charging system according to an embodiment of the present application.

[0027] FIG2 is a connection diagram of an AC / DC integrated charging system according to an embodiment of the present application.

[0028] FIG3 is a structural diagram showing that the output end of the AC terminal and the output end of the DC terminal are respectively connected to form a common output end according to an embodiment of the present application.

[0029] FIG4 is a structural diagram showing another embodiment of the present application in which the output end of the AC terminal and the output end of the DC terminal are respectively connected to form a common output end.

[0030] The markings in the figure are as follows: 1. Conversion plug; 11. AC interface; 12. DC interface; 111. AC positive terminal; 112. AC negative terminal; 113. AC PE terminal; 121. DC positive terminal; 122. DC negative terminal; 123. DC PE terminal; 13. First adapter structure; 14. Second adapter structure; 15. Third adapter structure; 16. First output structure; 17. Second output structure; 18. Third output structure. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the settings, numerical expressions and numerical values ​​do not limit the scope of the present application.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the above technologies, methods, and equipment should be considered part of the specification.

[0034] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0035] The AC / DC integrated charging system provided in the present application, as shown in Figures 1 to 4, includes an AC charging device or a DC charging device, a conversion plug 1, a cable, a charging gun, a DC charging seat and a power battery.

[0036] The AC charging device includes an AC plug, and the DC charging device includes a DC plug. The conversion plug 1 includes an AC interface 11 and a DC interface 12. The AC plug is plugged into the AC interface 11 of the conversion plug 1, and the DC plug is plugged into the DC interface 12 of the conversion plug 1. The AC interface 11 is provided with at least one AC terminal for receiving AC power, and the DC interface 12 is provided with at least one DC terminal for receiving DC power. The output end of the AC terminal and the output end of the DC terminal are respectively connected to form a common output end, and the common output end is connected to the input end of the charging gun via a cable. The output end of the charging gun is detachably electrically connected to the input end of the DC charging stand, and the output end of the DC charging stand is connected to the input end of the power battery.

[0037] The charging gun integrates a control module, a current identification module, a DC management unit and an AC-DC management unit.

[0038] The control module is configured to obtain the current waveform at the common output terminal from the current identification module and to execute an AC charging mode or a DC charging mode based on the current waveform. The AC charging mode or the DC charging mode involves converting AC power into DC power via the AC-DC management unit and then supplying power to the power battery, or supplying power to the power battery via the DC management unit.

[0039] With the rapid development of new energy technologies, electric vehicles have become increasingly popular. Currently, charging equipment on the market includes DC charging guns and AC charging guns to complete charging tasks. However, the charging interface standards for the charging base that matches the charging gun are diverse, such as national standards, European standards, or American standards. In addition, there are DC charging interfaces and AC charging interfaces. Therefore, in order to adapt to multiple charging interfaces, electric vehicles generally have integrated AC interfaces 11 and DC interfaces 12 in the car charging base. The AC interface 11 and the DC interface 12 are connected to the charger and the vehicle battery respectively using cables. Due to the large charging current, the cable diameter of the charging harness is also relatively thick, and the number of accessories used to assist in assembly on the charging harness is also large, which greatly increases the weight and cost of the charging harness.

[0040] The output ends of the AC terminals within the AC interface 11 and the output ends of the DC terminals within the DC interface 12 of the converter plug 1 of the present application are connected to form a common output terminal. This common output terminal is sequentially connected to the charging gun, DC charging station, and power battery via cables, eliminating the output cables for the AC or DC terminals. Cables are connected only at the common output terminal. The AC and DC are connected on the same line, eliminating the AC interface 11 of the charging station and using only the DC charging station. This reduces the number of charging harnesses and all harness accessories, such as cable ties, tape, and brackets, significantly reducing costs. Because this application only requires one charging gun, it eliminates one AC or DC charging gun, thus reducing costs and simplifying overall connection. Furthermore, the charging gun integrates a control module, a current identification module, a DC management unit, and an AC-to-DC management unit. The charging gun can detect the current waveform at the common output terminal based on the current identification module and execute either AC or DC charging mode. The charging gun also provides two-in-one charging management functions: DC and AC charging management.

[0041] In some embodiments, the output end of the DC charging device can be directly connected to a DC charging base to supply power to the power battery through the DC charging base.

[0042] In some embodiments, as shown in FIG3 , the AC terminals include an AC negative terminal 112, an AC PE terminal 113, and an AC positive terminal 111, and the DC terminals include a DC negative terminal 122, a DC PE terminal 123, and a DC positive terminal 121. The output of the AC positive terminal 111 is connected to the output of the DC positive terminal 121 via a first adapter structure 13; the output of the AC negative terminal 112 is connected to the output of the DC negative terminal 122 via a second adapter structure 14; the output of the AC PE terminal 113 is connected to the output of the DC PE terminal 123 via a third adapter structure 15; and the outputs of the DC positive terminal 121, the DC negative terminal 122, and the DC PE terminal 123 collectively form a common output.

[0043] The output end of the AC terminal is transferred to the output end of the DC terminal through a transfer structure. Only the output end of the DC positive terminal 121, the output end of the DC negative terminal 122 and the output end of the DC PE terminal 123 of the DC terminal form a common output end, and are connected to the on-board charger through a cable. The output end of the on-board charger is connected to the power battery, which can reduce the number of AC cables connected to the output end of the AC terminal and all accessories such as cable ties, tapes and brackets used for the cables, thereby greatly reducing costs.

[0044] In some embodiments, the first adapter structure 13 , the second adapter structure 14 , and the third adapter structure 15 are any one or a combination of adapter bars or adapter wires.

[0045] The first adapter structure 13, the second adapter structure 14 and the third adapter structure 15 all use conductive adapter bars or adapter wires. The adapter bars can be copper bars or aluminum bars. The copper bars are also called copper busbars or copper busbars. They are made of copper and are long conductors with rectangular or chamfered (rounded) rectangular cross-sections (rounded copper bars are generally used to avoid tip discharge). They are high-current conductive products that play the role of transmitting current and electrical connection in the circuit.

[0046] Aluminum busbars are long aluminum products with a rectangular cross-section made of aluminum or aluminum alloy, sometimes also called busbars.

[0047] The adapter cable is a conductive cable used to connect the AC terminal and the DC terminal.

[0048] In some embodiments, as shown in FIG4 , the AC terminals include an AC negative terminal 112, an AC PE terminal 113, and an AC positive terminal 111. The DC terminals include a DC negative terminal 122, a DC PE terminal 123, and a DC positive terminal 121. The output of the AC positive terminal 111 and the output of the DC positive terminal 121 are connected via a first output structure 16. The output of the AC negative terminal 112 and the output of the DC negative terminal 122 are connected via a second output structure 17. The output of the AC PE terminal 113 and the output of the DC PE terminal 123 are connected via a third output structure 18. The first output structure 16, the second output structure 17, and the third output structure 18 collectively form a common output terminal.

[0049] The output of the AC terminal and the output of the DC terminal are connected via a first output structure 16 (e.g., they can also be connected via a first output structure 16, a second output structure 17, and a third output structure 18). The first output structure 16, the second output structure 17, and the third output structure 18 collectively form a common output terminal, which is then connected to the onboard charger via a cable. Connecting the output of the onboard charger to the power battery can reduce the number of cables connected to the AC or DC terminal outputs, as well as all accessories such as cable ties, tape, and brackets, significantly reducing costs.

[0050] In some embodiments, the first output structure 16 , the second output structure 17 , and the third output structure 18 are any one or a combination of patch cords or patch cables.

[0051] The first output structure 16, the second output structure 17, and the third output structure 18 all use conductive adapter bars or adapter wires. The adapter bars can be copper bars or aluminum bars. Copper bars, also known as copper busbars or copper busbars, are made of copper and are long conductors with rectangular or chamfered (rounded) rectangular cross-sections (rounded copper bars are generally used to avoid tip discharge). They are high-current conductive products that carry current and provide electrical connections in circuits.

[0052] Aluminum busbars are long aluminum products with a rectangular cross-section made of aluminum or aluminum alloy, sometimes also called busbars.

[0053] The adapter cable is a conductive cable used to connect the AC terminal and the DC terminal.

[0054] In some embodiments, the common output end is connected to the input end of the current identification module, the output end of the current identification module is connected to the input end of the control module, the DC management unit and the AC-DC management unit are connected in parallel, the output end of the control module is respectively connected to the input end of the DC management unit and the AC-DC management unit, and the output end of the DC management unit or the output end of the AC-DC management unit is connected to the input end of the DC charging stand.

[0055] It can be understood as follows: the current identification module identifies the current waveform of the common output end; the control module controls the charging gun to execute the charging mode according to the current waveform. If it is an AC waveform, the power battery is charged through the AC to DC management unit; if it is a DC waveform, the power battery is charged through the DC management unit.

[0056] In some embodiments, a high-voltage distribution unit and a BMS (Battery Management System) are connected in series between the DC charging station and the power battery.

[0057] The high-voltage distribution unit (HDU) is a control unit that distributes energy from the power battery and is a key component in electric vehicles. It primarily distributes power and provides short-circuit and overload protection, supplying power to the power battery and onboard electrical components.

[0058] A BMS is a battery management system. Its primary function is to intelligently manage and maintain individual battery cells, prevent overcharging and over-discharging, extend battery life, and monitor battery status. As the battery management system for electric vehicles, the BMS is the crucial link between the onboard power battery and the electric vehicle. The BMS collects, processes, and stores crucial information about the battery pack's operation in real time, exchanging information with external devices such as the vehicle controller. This information addresses key issues in lithium-ion battery systems, including safety, availability, usability, and service life.

[0059] In some embodiments, the AC-DC management unit is integrated with a rectifier, and converts the AC power output from the common output terminal into DC power through the rectifier.

[0060] The rectifier integrated into the AC charge management unit is an electrical device that converts alternating current, which periodically reverses direction, into direct current, which flows in only one direction.

[0061] In some embodiments, the output end of the high voltage distribution unit is further connected to a DC converter, a heater, and an air conditioning system.

[0062] The high-voltage distribution unit can effectively distribute the electrical energy of the power battery to the DC converter, heater and air-conditioning system, thereby achieving efficient arrangement of electricity use.

[0063] In some embodiments, the output end of the high voltage distribution unit is connected to the DC converter, the heater, and the air conditioning system through a busbar and a wiring harness.

[0064] The high-voltage distribution unit connects the DC converter, heater and air-conditioning system through the busbar (the busbar is an electronic component that can be copper or aluminum. It is an important component of electronic equipment and is used to connect and transmit current and signals. The surface is insulated and its main function is to serve as a conductor) and the wiring harness to provide charging control for new energy vehicle electrical appliances and monitor the operation of the electrical system.

[0065] In some embodiments, the high voltage distribution unit further includes an overload protection circuit.

[0066] The high-voltage distribution unit (HVDU) of electric vehicles features an overload protection circuit and short-circuit protection, which can quickly cut off power in the event of a circuit anomaly, thereby preventing accidents caused by circuit failures. Furthermore, the HVDU monitors the electrical system in real time, promptly detecting and alerting abnormalities.

[0067] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. An AC / DC integrated charging system, characterized in that: include: AC charging equipment or DC charging equipment, conversion plugs, cables, charging guns, DC charging stations and power batteries; The AC charging device includes an AC plug, the DC charging device includes a DC plug, the conversion plug includes an AC interface and a DC interface, the AC plug is plugged into the AC interface of the conversion plug, the DC plug is plugged into the DC interface of the conversion plug, the AC interface is provided with at least one AC terminal for accessing AC power, the DC interface is provided with at least one DC terminal for accessing DC power, the output end of the AC terminal and the output end of the DC terminal are respectively connected to form a common output end, the common output end is connected to the input end of the charging gun through the cable, the output end of the charging gun is detachably electrically connected to the input end of the DC charging seat, and the output end of the DC charging seat is connected to the power battery input end; The charging gun integrates a control module, a current identification module, a DC management unit and an AC to DC management unit, and The control module is configured to obtain the current waveform of the common output terminal by the current identification module, and execute an AC charging mode or a DC charging mode according to the current waveform, wherein the AC charging mode or the DC charging mode is to power the power battery after converting the power into DC power by the AC to DC management unit or to power the power battery through the DC management unit.

2. The AC / DC integrated charging system according to claim 1, characterized in that: The AC terminal includes an AC negative terminal, an AC PE terminal and an AC positive terminal, and the DC terminal includes a DC negative terminal, a DC PE terminal and a DC positive terminal; the output end of the AC positive terminal is transferred to the output end of the DC positive terminal through a first transfer structure, the output end of the AC negative terminal is transferred to the output end of the DC negative terminal through a second transfer structure, and the output end of the AC PE terminal is transferred to the output end of the DC PE terminal through a third transfer structure; The output end of the DC positive terminal, the output end of the DC negative terminal and the output end of the DC PE terminal together form the common output end.

3. The AC / DC integrated charging system according to claim 2, characterized in that: The first adapter structure, the second adapter structure and the third adapter structure are any one or a combination of adapter bars or adapter lines.

4. The AC / DC integrated charging system according to claim 1, characterized in that: The AC terminal includes an AC negative terminal, an AC PE terminal and an AC positive terminal, and the DC terminal includes a DC negative terminal, a DC PE terminal and a DC positive terminal; the output end of the AC positive terminal and the output end of the DC positive terminal are connected through a first output structure, the output end of the AC negative terminal and the output end of the DC negative terminal are connected through a second output structure, and the output end of the AC PE terminal and the DC PE terminal are connected through a third output structure; and the first output structure, the second output structure and the third output structure together form the common output end.

5. The AC / DC integrated charging system according to claim 4, characterized in that: The first output structure, the second output structure and the third output structure are any one or a combination of adapter bars or adapter wires.

6. The AC / DC integrated charging system according to claim 1, characterized in that: The common output end is connected to the input end of the current identification module, the output end of the current identification module is connected to the input end of the control module, the DC management unit is connected in parallel with the AC-to-DC management unit, the output end of the control module is respectively connected to the input ends of the DC management unit and the AC-to-DC management unit, and the output end of the DC management unit or the output end of the AC-to-DC management unit is connected to the input end of the DC charging socket.

7. The AC / DC integrated charging system according to claim 1, characterized in that: A high voltage distribution unit and a BMS are connected in series between the DC charging station and the power battery.

8. The AC / DC integrated charging system according to claim 1, characterized in that: The AC-to-DC management unit is integrated with a rectifier and converts the AC power output from the common output terminal into DC power through the rectifier.

9. The AC / DC integrated charging system according to claim 7, characterized in that: The output end of the high voltage distribution unit is also connected to a DC converter, a heater and an air conditioning system.

10. The AC / DC integrated charging system according to claim 9, characterized in that: The output end of the high voltage distribution unit is connected to the DC converter, the heater and the air conditioning system through a busbar and a wiring harness.

11. The AC / DC integrated charging system according to claim 7, characterized in that: The high voltage distribution unit also includes an overload protection circuit.

Images