New energy vehicle charging system and new energy vehicle

Abstract

The utility model relates to a new energy vehicle charging system and a new energy vehicle. The new energy vehicle charging system comprises a charging socket module which comprises N charging sockets; the charging loop module comprises N charging loops which are connected in parallel; the discharge loop module comprises a plurality of discharge loops which are connected in parallel, and each discharge loop at least comprises a main positive loop and a main negative loop; the battery module comprises a battery module; wherein one charging socket is connected in series in one charging loop; the plurality of charging guns charge the battery module together through the plurality of charging sockets and the plurality of charging loops; the battery module supplies power to the whole vehicle system through the main positive loop and the main negative loop. The new energy vehicle charging system comprises at least two or more charging sockets and charging loops, so that the new energy vehicle can be charged by two or more charging guns at the same time when being charged, the charging efficiency is improved, and the charging duration is shortened.

Description

Technical Field

[0001] This disclosure relates to the field of new energy technology, and in particular to a new energy vehicle charging system and a new energy vehicle. Background Technology

[0002] Guided by the "dual-carbon strategy," new energy commercial vehicles have entered a period of rapid development. Currently, with the improvement of battery energy density and the increasing demand for longer driving range from users, more and more high-capacity new energy commercial vehicles are being put into the market, thus making the demand for high-power charging increasingly urgent. Currently, commercial vehicle charging piles generally use single-gun or dual-gun DC fast charging methods with a power of 120 to 300 kW to replenish vehicles, and each vehicle can only confirm a charging signal with one ordinary charging pile; the charging time of one or two hours often encroaches on the actual operating time of new energy commercial vehicles. Utility Model Content

[0003] In view of this, the present disclosure aims to provide a new energy vehicle charging system and a new energy vehicle.

[0004] The technical solution disclosed herein is implemented as follows:

[0005] Firstly, this disclosure provides a charging system for new energy vehicles.

[0006] The new energy vehicle charging system provided in this disclosure includes:

[0007] A charging socket module, comprising N charging sockets;

[0008] The charging circuit module includes N parallel charging circuits; where N≥2;

[0009] The discharge circuit module includes multiple discharge circuits connected in parallel, wherein each discharge circuit includes at least one main positive circuit and one main negative circuit;

[0010] Battery module, including battery module;

[0011] In this configuration, one charging socket is connected in series in one charging circuit; multiple charging circuits and multiple discharging circuits are connected in parallel and then connected to the battery module.

[0012] The battery module is charged by multiple charging guns through multiple charging sockets and multiple charging circuits; the battery module supplies power to the vehicle system through the main positive circuit and the main negative circuit.

[0013] In some embodiments, a charging circuit includes a DC charging positive interface, a DC charging positive relay, a battery main positive interface, a DC charging negative interface, a DC charging negative relay, and a battery main negative interface;

[0014] The positive terminal of the charging socket is connected to the DC charging positive interface, the DC charging positive interface is connected to the DC charging positive relay, the DC charging positive relay is connected to the battery main positive interface, and the battery main positive interface is connected to the positive terminal of the battery module.

[0015] The negative terminal of the charging socket is connected to the DC charging negative interface, the DC charging negative interface is connected to the DC charging negative relay, the DC charging negative relay is connected to the battery main negative interface, and the battery main negative interface is connected to the negative terminal of the battery module.

[0016] In some embodiments, the main positive circuit includes a main positive circuit interface, a main positive relay, and a battery main positive interface; wherein, the positive terminal of the battery module is connected to the battery main positive interface, the battery main positive interface is connected to the main positive relay, and the main positive relay is connected to the main positive circuit interface;

[0017] The main negative circuit includes a main negative circuit interface, a main negative relay, and a battery total negative interface; wherein, the negative terminal of the battery module is connected to the battery total negative interface, the battery total negative interface is connected to the main negative relay, and the main negative relay is connected to the main negative circuit interface;

[0018] The main positive circuit interface and the main negative circuit interface are connected to the vehicle system.

[0019] In some embodiments, an MSD manual maintenance switch is connected between the battery main positive interface and the DC charging positive relay, and between the battery main positive interface and the main positive relay.

[0020] In some embodiments, a current sensor is connected between the battery main negative interface and the DC charging negative relay, and between the battery main negative interface and the main negative relay.

[0021] In some embodiments, including:

[0022] One master host and multiple slave hosts;

[0023] The main host and the plurality of slave hosts are all connected to the charging circuit module, the discharging circuit module and the battery module;

[0024] The main host is used to monitor and control the working status of the new energy vehicle charging system, and to interact with the controller through the vehicle communication network, as well as to communicate with the DC charging pile to complete the charging management function, and to control the communication between multiple slave hosts, signal detection, and the opening or closing of relays in the charging circuit.

[0025] The slave unit is used to control the charging signal confirmation of multiple charging sockets and the communication between the charging pile and the new energy vehicle.

[0026] In some embodiments, the main positive circuit further includes a pre-charge circuit connected in parallel with the main positive relay;

[0027] The pre-charging circuit includes a pre-charging relay and a pre-charging resistor connected in series.

[0028] In some embodiments, there are multiple slave hosts; wherein one slave host is used to control the charging signal confirmation of the two charging sockets and the communication between the charging pile and the new energy vehicle.

[0029] In some embodiments, the battery main positive interface is a plurality of parallel terminals; the MSD manual maintenance switch is one or a plurality of parallel terminals.

[0030] Multiple parallel battery main positive terminals are connected to multiple parallel MSD manual maintenance switches.

[0031] Multiple parallel MSD manual maintenance switches are connected between the battery main positive interface and the DC charging positive relay, and between the battery main positive interface and the main positive relay.

[0032] Secondly, this disclosure provides a new energy vehicle, including the new energy vehicle charging system described in the first aspect;

[0033] and the entire vehicle system; among which,

[0034] The battery module in the new energy vehicle charging system is used to supply power to the entire vehicle system.

[0035] A new energy vehicle charging system according to an embodiment of this disclosure includes: a charging socket module comprising N charging sockets; a charging circuit module comprising N parallel charging circuits, wherein N ≥ 2; a discharging circuit module comprising multiple parallel discharging circuits, wherein each discharging circuit includes at least one main positive circuit and one main negative circuit; a battery module comprising a battery module; wherein a charging socket is connected in series in one charging circuit; multiple charging circuits and multiple discharging circuits are connected in parallel to the battery module; wherein multiple charging guns charge the battery module together through multiple charging sockets and multiple charging circuits; and the battery module supplies power to the entire vehicle system through the main positive circuit and the main negative circuit. The new energy vehicle charging system in this application includes at least two charging sockets and charging circuits, enabling the new energy vehicle to be charged simultaneously by two or more charging guns, thereby improving charging efficiency and reducing charging time.

[0036] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a new energy vehicle charging system structure according to an exemplary embodiment;

[0038] Figure 2 This is a structural diagram of a new energy vehicle charging system according to an exemplary embodiment.

[0039] Figure Labels

[0040] 01. Charging socket module; 02. Charging circuit; 03. Discharging circuit; 04. Battery module; 05. Vehicle system. Detailed Implementation

[0041] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting this disclosure.

[0042] Guided by the "dual-carbon strategy," new energy commercial vehicles have entered a period of rapid development. Currently, with the improvement of battery energy density and the increasing demand for longer driving range from users, more and more high-capacity new energy commercial vehicles are being put into the market, thus making the demand for high-power charging increasingly urgent. Currently, commercial vehicle charging piles generally use single-gun or dual-gun DC fast charging methods with a power of 120 to 300 kW to replenish vehicles, and each vehicle can only confirm a charging signal with one ordinary charging pile; the charging time of one or two hours often encroaches on the actual operating time of new energy commercial vehicles.

[0043] In view of the above situation, this disclosure provides a charging system for new energy vehicles. Figure 1 This is a schematic diagram of a new energy vehicle charging system structure according to an exemplary embodiment. Figure 1 As shown, the new energy vehicle charging system includes:

[0044] Charging socket module 01 includes N charging sockets;

[0045] Charging circuit module 02 includes N parallel charging circuits; where N≥2;

[0046] The discharge circuit module 03 includes multiple discharge circuits connected in parallel, wherein each discharge circuit includes at least one main positive circuit and one main negative circuit.

[0047] Battery module 04 includes a battery module;

[0048] In this configuration, one charging socket is connected in series in one charging circuit; multiple charging circuits and multiple discharging circuits are connected in parallel and then connected to the battery module.

[0049] The battery module is charged by multiple charging guns through multiple charging sockets and multiple charging circuits; the battery module supplies power to the vehicle system 05 through the main positive circuit and the main negative circuit.

[0050] In this exemplary embodiment, the battery module 04 may include multiple battery packs. A charging circuit 021 can charge one or more battery packs, and a battery pack can also be charged by one or more charging circuits. A charging socket can supply power to one charging circuit 021. Simultaneously, multiple charging circuits 021 are connected in parallel to the battery module 04. The multiple parallel charging circuits 021 can simultaneously supply power to the battery module 04. When the vehicle is charging, multiple charging guns can be applied to multiple charging sockets, allowing the battery module 04 to be charged simultaneously through multiple charging circuits 021, thereby improving charging efficiency and reducing charging time.

[0051] In some embodiments, Figure 2 This is a structural diagram of a new energy vehicle charging system according to an exemplary embodiment. For example... Figure 2 As shown, one of the charging circuits 021 includes a DC charging positive interface, a DC charging positive relay, a battery main positive interface, a DC charging negative interface, a DC charging negative relay, and a battery main negative interface;

[0052] The positive terminal of the charging socket is connected to the DC charging positive interface, the DC charging positive interface is connected to the DC charging positive relay, the DC charging positive relay is connected to the battery main positive interface, and the battery main positive interface is connected to the positive terminal of the battery module 04.

[0053] The negative terminal of the charging socket is connected to the DC charging negative interface, the DC charging negative interface is connected to the DC charging negative relay, the DC charging negative relay is connected to the battery main negative interface, and the battery main negative interface is connected to the negative terminal of the battery module 04.

[0054] In this exemplary embodiment, multiple charging circuits 021 are connected in parallel, and each charging circuit 021 includes a DC charging positive relay and a DC charging negative relay. When the battery module 04 is being charged, if all charging circuits 021 are operational, then the DC charging positive and negative relays of all charging circuits 021 are closed (charging circuit 021 is on). If only one or more charging circuits 021 are selected to charge the battery module 04, then the DC charging positive and negative relays in the selected charging circuit 021 are closed (charging circuit 021 is on), and the DC charging positive and negative relays in the unselected charging circuits 021 are open (charging circuit 021 is interrupted). By using the DC charging positive and negative relays in conjunction, the situation where the positive circuit is interrupted and the negative circuit is on while energized is avoided. Therefore, each charging circuit 021 includes both DC charging positive and DC charging negative relays, which close or open synchronously.

[0055] In some embodiments, the main positive circuit includes a main positive circuit interface, a main positive relay, and a battery main positive interface; wherein, the positive terminal of the battery module 04 is connected to the battery main positive interface, the battery main positive interface is connected to the main positive relay, and the main positive relay is connected to the main positive circuit interface;

[0056] The main negative circuit includes a main negative circuit interface, a main negative relay, and a battery total negative interface; wherein, the negative terminal of the battery module 04 is connected to the battery total negative interface, the battery total negative interface is connected to the main negative relay, and the main negative relay is connected to the main negative circuit interface;

[0057] The main positive circuit interface and the main negative circuit interface are connected to the vehicle system 05.

[0058] In this exemplary embodiment, the discharge circuit 031 is mainly used to supply power to the vehicle system 05. The discharge circuit 031 mainly includes a main positive circuit and a main negative circuit. In specific applications, there can be multiple main positive circuits and main negative circuits. The battery modules in the battery module can also be multiple groups. One main positive circuit and one main negative circuit are combined to form a discharge circuit 031. In this application, the discharge circuit 031 can also include multiple circuits. One main positive circuit includes a main positive circuit interface, a main positive relay, and a battery main positive interface; one main negative circuit includes a main negative circuit interface, a main negative relay, and a battery main negative interface. The negative terminal of the battery module 04 is connected to the battery main negative interface, the battery main negative interface is connected to the main negative relay, and the main negative relay is connected to the main negative circuit interface; the negative terminal of the battery module 04 is connected to the battery main negative interface, the battery main negative interface is connected to the main negative relay, and the main negative relay is connected to the main negative circuit interface. When there are two discharge circuits 031, such as Figure 2 As shown, the main positive circuit 1 interface and the main positive circuit 2 interface are connected in parallel and then connected to the main positive relay; the main negative circuit 1 interface and the main negative circuit 2 interface are connected in parallel and then connected to the main negative relay.

[0059] In some embodiments, an MSD manual maintenance switch is connected between the battery main positive interface and the DC charging positive relay, and between the battery main positive interface and the main positive relay.

[0060] In this exemplary embodiment, an MSD manual maintenance switch is connected between the battery main positive interface and the DC charging positive relay, and between the battery main positive interface and the main positive relay. The MSD manual maintenance switch can be used for high-voltage safety protection of the new energy vehicle; it can also be used for vehicle maintenance to ensure the safety of people and the vehicle. By removing the MSD, the power supply to the high-voltage system can be disconnected, achieving electrical isolation of the high-voltage system and providing short-circuit protection.

[0061] In some embodiments, a current sensor is connected between the battery main negative interface and the DC charging negative relay, and between the battery main negative interface and the main negative relay.

[0062] In this exemplary embodiment, by incorporating a current sensor into the charging circuit 021, the current magnitude flowing through the charging circuit 021 or the discharging circuit 031 can be monitored. The detected information is then converted into an electrical signal and output to the main unit, which controls the entire system. For example, when the vehicle battery is low and multiple charging guns are needed, the current in the charging circuit 021 can be monitored using a current sensor.

[0063] In some embodiments, including:

[0064] One master host and multiple slave hosts;

[0065] The main host and the plurality of slave hosts are all connected to the charging circuit module 02, the discharging circuit module 03 and the battery module;

[0066] The main host is used to monitor and control the working status of the new energy vehicle charging system, and to interact with the controller through the vehicle communication network, as well as to communicate with the DC charging pile to complete the charging management function, and to control the communication between multiple slave hosts, signal detection, and the opening or closing of relays in the charging circuit.

[0067] The slave unit is used to control the charging signal confirmation of multiple charging sockets and the communication between the charging pile and the new energy vehicle.

[0068] In this exemplary embodiment, vehicle charging management can be performed synchronously using a master host and multiple slave hosts. The master host monitors and controls the operating status of the new energy vehicle charging system, interacts with the controller via the vehicle communication network, and communicates with the DC charging pile to complete charging management functions. The slave hosts control the charging signal confirmation of multiple charging sockets and the communication between the charging pile and the new energy vehicle. For example, there are four charging sockets and two slave hosts. The slave hosts include a first slave host and a second slave host. The first slave host controls the charging signal confirmation of charging sockets 1 and 2; the second slave host controls the charging signal confirmation of charging sockets 3 and 4, thereby facilitating separate control of each charging circuit and improving vehicle charging efficiency. The communication between the new energy vehicle charging system and the charging pile is handled by the slave hosts, which then transmit the signals to the master host.

[0069] In some embodiments, the main positive circuit further includes a pre-charge circuit connected in parallel with the main positive relay;

[0070] The pre-charging circuit includes a pre-charging relay and a pre-charging resistor connected in series.

[0071] In this exemplary embodiment, all relays are in the off state when the vehicle is not in use, ensuring the safety of high-voltage electricity use;

[0072] When the vehicle is powered on normally, first close the main negative relay, then close the precharge relay. After the precharge is completed, close the main positive relay, and finally disconnect the precharge relay.

[0073] In this exemplary embodiment, a pre-charge relay and a pre-charge resistor form a pre-charge circuit. The function of the pre-charge circuit is to prevent a large current surge at the moment the relay closes, which could cause the main positive relay and the main negative relay to stick together.

[0074] In some embodiments, there are multiple slave hosts; wherein one slave host is used to control the charging signal confirmation of two charging sockets.

[0075] In this exemplary embodiment, by confirming the charging signal of the two charging sockets controlled by the host, multiple charging sockets can be controlled separately, which is beneficial for controlling each charging circuit separately, thereby improving the charging efficiency and high voltage safety of the vehicle.

[0076] In some embodiments, the battery main positive interface is a plurality of parallel terminals; the MSD manual maintenance switch is one or a plurality of parallel terminals.

[0077] Multiple parallel battery main positive terminals are connected to multiple parallel MSD manual maintenance switches.

[0078] Multiple parallel MSD manual maintenance switches are connected between the battery main positive interface and the DC charging positive relay, and between the battery main positive interface and the main positive relay.

[0079] In this exemplary embodiment, the MSD manual maintenance switch can be used for high-voltage safety protection of new energy vehicles; the MSD manual maintenance switch can also be used for vehicle maintenance to ensure the safety of people and vehicles. By pulling out the MSD, the power supply to the high-voltage system can be disconnected, achieving electrical isolation of the high-voltage system and providing short-circuit protection.

[0080] This disclosure provides a new energy vehicle, including the new energy vehicle charging system described in the above embodiments;

[0081] and the entire vehicle system; among which,

[0082] The battery module in the new energy vehicle charging system is used to supply power to the entire vehicle system.

[0083] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0084] It should be understood that various parts of this disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0085] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0086] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0087] Furthermore, the terms "first," "second," etc., used in the embodiments of this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of technical features indicated in this embodiment. Therefore, features defined with terms such as "first" and "second" in the embodiments of this disclosure can explicitly or implicitly indicate that the embodiment includes at least one of those features. In the description of this disclosure, the word "multiple" means at least two or more, such as two, three, four, etc., unless otherwise explicitly specified in the embodiments.

[0088] In this disclosure, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing," etc., appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication between two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific implementation.

[0089] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0090] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A charging system for new energy vehicles, characterized in that, include: A charging socket module, comprising N charging sockets; The charging circuit module includes N parallel charging circuits; where N≥2; The discharge circuit module includes multiple discharge circuits connected in parallel, wherein each discharge circuit includes at least one main positive circuit and one main negative circuit. Battery module, including battery module; In this configuration, one charging socket is connected in series in one of the charging circuits; multiple charging circuits and multiple discharging circuits are connected in parallel to the battery module. The battery module is charged by multiple charging guns through multiple charging sockets and multiple charging circuits; the battery module supplies power to the vehicle system through the main positive circuit and the main negative circuit.

2. The new energy vehicle charging system according to claim 1, characterized in that, One of the charging circuits includes a DC charging positive interface, a DC charging positive relay, a battery main positive interface, a DC charging negative interface, a DC charging negative relay, and a battery main negative interface; Wherein, the positive terminal of the charging socket is connected to the DC charging positive interface, the DC charging positive interface is connected to the DC charging positive relay, the DC charging positive relay is connected to the battery main positive interface, and the battery main positive interface is connected to the positive terminal of the battery module; The negative terminal of the charging socket is connected to the DC charging negative interface, the DC charging negative interface is connected to the DC charging negative relay, the DC charging negative relay is connected to the battery main negative interface, and the battery main negative interface is connected to the negative terminal of the battery module.

3. The new energy vehicle charging system according to claim 2, characterized in that, The main positive circuit includes a main positive circuit interface, a main positive relay, and a battery main positive interface; wherein, the positive terminal of the battery module is connected to the battery main positive interface, the battery main positive interface is connected to the main positive relay, and the main positive relay is connected to the main positive circuit interface; The main negative circuit includes a main negative circuit interface, a main negative relay, and a battery total negative interface; wherein, the negative terminal of the battery module is connected to the battery total negative interface, the battery total negative interface is connected to the main negative relay, and the main negative relay is connected to the main negative circuit interface; The main positive circuit interface and the main negative circuit interface are connected to the vehicle system.

4. The new energy vehicle charging system according to claim 3, characterized in that, An MSD manual maintenance switch is connected between the battery main positive interface and the DC charging positive relay, and between the battery main positive interface and the main positive relay.

5. The new energy vehicle charging system according to claim 3, characterized in that, A current sensor is connected between the battery main negative interface and the DC charging negative relay, and between the battery main negative interface and the main negative relay.

6. The new energy vehicle charging system according to claim 3, characterized in that, include: One master host and multiple slave hosts; The main host and the plurality of slave hosts are all connected to the charging circuit module, the discharging circuit module and the battery module; The main host is used to monitor and control the working status of the new energy vehicle charging system, and to interact with the controller through the vehicle communication network, as well as to communicate with the DC charging pile to complete the charging management function, and to control the communication between multiple slave hosts, signal detection, and the opening or closing of relays in the charging circuit. The slave unit is used to control the charging signal confirmation of multiple charging sockets and the communication between the charging pile and the new energy vehicle.

7. The new energy vehicle charging system according to claim 3, characterized in that, The main positive circuit also includes a pre-charging circuit connected in parallel with the main positive relay; The pre-charging circuit includes a pre-charging relay and a pre-charging resistor connected in series.

8. The new energy vehicle charging system according to claim 6, characterized in that, There are multiple slave hosts; one of the slave hosts is used to control the charging signal confirmation of the two charging sockets and the communication between the charging pile and the new energy vehicle.

9. The new energy vehicle charging system according to claim 4, characterized in that, The battery main positive interface is a plurality of parallel terminals; the MSD manual maintenance switch is one or a plurality of parallel terminals. Multiple parallel battery main positive terminals are connected to multiple parallel MSD manual maintenance switches. Multiple parallel MSD manual maintenance switches are connected between the battery main positive interface and the DC charging positive relay, and between the battery main positive interface and the main positive relay.

10. A new energy vehicle, characterized in that, Includes the new energy vehicle charging system as described in any one of claims 1-9; and the entire vehicle system; among which, The battery module in the new energy vehicle charging system is used to supply power to the entire vehicle system.

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