High-voltage control system for new energy vehicles

Abstract

This application discloses a high-voltage control system for new energy vehicles, relating to the field of new energy vehicle technology. The high-voltage control system includes a constant power supply, a battery management system, a first switching device, and a second switching device. The constant power supply is connected to a first connection terminal of the first switching device and a second connection terminal of the second switching device. A third connection terminal of the first switching device is connected to the positive control terminal of the high-voltage relay of the battery management system. A fourth connection terminal of the second switching device is connected to the negative control terminal of the high-voltage relay of the battery management system. The battery management system is used to control the high-voltage relay of the battery to disconnect when both the positive and negative control terminals of the high-voltage relay are detected to be at a low level, thereby cutting off the high-voltage power supply to the vehicle. Using this application, it is possible to conveniently and quickly achieve high-voltage power-off of the entire vehicle.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, and in particular to a high-voltage control system for new energy vehicles. Background Technology

[0002] With increasing environmental awareness and the continuous development of new energy vehicle technology, new energy vehicles are becoming increasingly popular in the market. However, in scenarios such as new energy vehicle prototyping and driving, vehicle system malfunctions or other emergencies may necessitate repairs. However, new energy vehicles are equipped with high-voltage system components such as battery packs, motors, high-voltage distribution boxes, chargers, and high-voltage power conversion systems. Repairing these vehicles under high-voltage load conditions poses safety risks. Therefore, to ensure the personal safety of repair personnel and prevent high-voltage electric shock accidents during vehicle repairs, a technical solution for disconnecting the entire high voltage from new energy vehicles is urgently needed. Summary of the Invention

[0003] This application provides a high-voltage control system for new energy vehicles, capable of cutting off the high-voltage power supply to the entire vehicle under manual control. The technical solution is as follows:

[0004] In a first aspect, a high-voltage control system for a new energy vehicle is provided, the high-voltage control system comprising a constant power supply, a battery management system, a first switching device, and a second switching device, wherein:

[0005] The constant power supply is connected to the first connection terminal of the first switching device and the second connection terminal of the second switching device, respectively.

[0006] The third connection terminal of the first switching device is connected to the positive control terminal of the high-voltage relay of the battery management system;

[0007] The fourth connection terminal of the second switching device is connected to the negative control terminal of the high-voltage relay of the battery management system;

[0008] The battery management system is used to control the high-voltage relay of the battery to disconnect when it detects that the positive control terminal and the negative control terminal of the high-voltage relay are at a low level, so as to cut off the high-voltage power supply to the whole vehicle.

[0009] In one possible implementation, the high-voltage control system further includes a first multi-channel synchronous switching device, wherein the first switching device and the second switching device are both branch switches of the multi-channel synchronous switching device, and the first switching device and the second switching device are synchronously switched on and off.

[0010] In one possible implementation, the high-voltage control system further includes a first indicating device and a third switching device, wherein the third switching device is a branch switch of the multi-channel synchronous switching device, and the first switching device, the second switching device, and the third switching device are synchronously switched on and off, wherein:

[0011] The fifth connection terminal of the third switching device is connected to the second connection terminal of the second switching device, the sixth connection terminal of the third switching device is connected to one end of the first indicating device, and the other end of the first indicating device is connected to the fourth connection terminal of the second switching device; or,

[0012] The fifth connection terminal of the third switching device is connected to the first connection terminal of the first switching device, the sixth connection terminal of the third switching device is connected to one end of the first indicator device, and the other end of the first indicator device is connected to the third connection terminal of the first switching device.

[0013] In one possible implementation, the new energy vehicle is a pure electric vehicle.

[0014] In one possible implementation, the high-voltage control system further includes an auxiliary power supply and an electronic control unit, wherein:

[0015] The auxiliary power supply and the auxiliary power supply terminal of the electronic control unit are connected.

[0016] In one possible implementation, the new energy vehicle is a hybrid vehicle.

[0017] In one possible implementation, the high-voltage control system further includes an auxiliary power supply, an electronic control unit, and a fourth switching device, wherein the fourth switching device is a branch switch of the multi-channel synchronous switching device, and the first switching device, the second switching device, the third switching device, and the fourth switching device are synchronously switched on and off, wherein:

[0018] The auxiliary power supply is connected to the seventh connection terminal of the fourth switching device;

[0019] The eighth connection terminal of the fourth switching device is connected to the auxiliary power supply terminal of the electronic control unit.

[0020] In one possible implementation, the high-voltage control system further includes a fifth switching device and a sixth switching device, wherein:

[0021] The fifth switching device is connected in series with the first switching device;

[0022] The sixth switching device is connected in series with the second switching device.

[0023] In one possible implementation, the high-voltage control system further includes a second multi-channel synchronous switching device, wherein the fifth and sixth switching devices are both branch switches of the multi-channel synchronous switching device, and the fifth and sixth switching devices are synchronously switched on and off.

[0024] In one possible implementation, the constant power supply is connected to the constant power supply terminal of the battery management system.

[0025] The beneficial effects of the technical solution provided in this application are:

[0026] In the technical solution provided in this application, two switching devices are introduced. One switching device is installed between the constant power supply and the positive control terminal of the high-voltage relay in the battery management system, and the other switching device is installed between the constant power supply and the negative control terminal of the high-voltage relay in the battery management system. When relevant personnel need to disconnect the high voltage of the vehicle, they can manually disconnect these two switching devices. Then, the battery management system can detect that both the positive and negative control terminals of the high-voltage relay have changed from a high level to a low level, and control the high-voltage relay of the battery to disconnect, so as to cut off the high voltage power supply of the battery to the vehicle. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a high-voltage control system for a new energy vehicle provided in an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of a high-voltage control system for a new energy vehicle provided in an embodiment of this application;

[0030] Figure 3 This is a schematic diagram of a high-voltage control system for a new energy vehicle provided in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of a high-voltage control system for a new energy vehicle provided in an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of a high-voltage control system for a new energy vehicle provided in an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of a high-voltage control system for a new energy vehicle provided in an embodiment of this application;

[0034] Figure 7 This is a schematic diagram of a high-voltage control system for a new energy vehicle provided in an embodiment of this application;

[0035] Figure 8 This is a schematic diagram of a high-voltage control system for a new energy vehicle provided in an embodiment of this application;

[0036] Figure 9 This is a schematic diagram of a high-voltage control system for a new energy vehicle provided in an embodiment of this application.

[0037] Legend:

[0038] 1. Constant power supply; 2. Battery management system; 3. First switching device; 4. Second switching device; 5. First indicating device; 6. Third switching device; 7. Auxiliary power supply; 8. Electronic control unit; 9. Fourth switching device; 10. Fifth switching device; 11. Sixth switching device; 12. Second indicating device; 13. Seventh switching device;

[0039] 03. First multi-channel synchronous on / off switching device; 04. Second multi-channel synchronous on / off switching device;

[0040] 100. First AND gate; 200. Second AND gate;

[0041] 2A, Positive control terminal of high-voltage relay; 3A, First connection terminal; 4A, Second connection terminal; 3B, Third connection terminal; 2B, Negative control terminal of high-voltage relay; 4B, Fourth connection terminal; 6A, Fifth connection terminal; 6B, Sixth connection terminal; 8A, Auxiliary power supply terminal; 9A, Seventh connection terminal; 9B, Eighth connection terminal; 2C, Constant power supply terminal; 100A, First input terminal of the first AND gate circuit; 100B, Second input terminal of the first AND gate circuit; 100C, First output terminal of the first AND gate circuit; 200A, First input terminal of the second AND gate circuit; 200B, Second input terminal of the second AND gate circuit; 200C, First output terminal of the second AND gate circuit. Detailed Implementation

[0042] This application provides a high-voltage control system for new energy vehicles, which can be applied to hybrid models such as HEV (Hybrid Vehicle), PHEV (Plug-in Hybrid Electric Vehicle), and REEV (Range-extended Electric Vehicle), as well as BEV (Battery Electric Vehicle).

[0043] In scenarios such as the trial production and driving of new energy vehicles, repairs may be necessary due to vehicle system malfunctions or other emergencies. However, new energy vehicles are equipped with high-voltage system components such as battery packs, motors, high-voltage distribution boxes, chargers, and high-voltage power conversion systems. Repairing these vehicles under high-voltage load conditions poses safety risks. Therefore, to ensure the personal safety of repair personnel and prevent high-voltage electric shock accidents during vehicle repairs, it is essential to take necessary precautions.

[0044] This application provides a high-voltage control system for a new energy vehicle. The system incorporates two switching devices. One device is installed between the constant power supply and the positive control terminal of the high-voltage relay in the BMS (Battery Management System), while the other device is installed between the constant power supply and the negative control terminal of the high-voltage relay in the BMS. When personnel need to disconnect the vehicle's high-voltage power, these two switching devices can be manually disconnected. The BMS can then detect a change from a high level to a low level at both the positive and negative control terminals of the high-voltage relay, and control the high-voltage relay of the battery to disconnect, thereby cutting off the high-voltage power supply from the battery to the vehicle.

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0046] See Figure 1 This application illustrates a high-voltage control system for a new energy vehicle, comprising a constant power supply 1, a battery management system 2, a first switching device 3, and a second switching device 4, wherein:

[0047] The constant power supply 1 is connected to the first connection terminal 3A of the first switching device 3 and the second connection terminal 4A of the second switching device 4. The third connection terminal 3B of the first switching device 3 is connected to the positive control terminal 2A of the high-voltage relay of the battery management system 2. The fourth connection terminal 4B of the second switching device 4 is connected to the negative control terminal 2B of the high-voltage relay of the battery management system 2. The battery management system 2 is used to control the high-voltage relay of the battery to disconnect when it detects that both the positive control terminal 2A and the negative control terminal 2B of the high-voltage relay have changed from high level to low level, thereby cutting off the high-voltage power supply to the vehicle.

[0048] The constant power supply 1, also known as K30 power, is connected to the battery (cartridge) of new energy vehicles to provide power.

[0049] Under normal vehicle operation, both the first switching device 3 and the second switching device 4 are in the ON state, and the positive control terminal 2A and the negative control terminal 2B of the high-voltage relay of the battery management system 2 are both at a high level. In the event of a vehicle malfunction, maintenance personnel, vehicle owners, and other relevant personnel need to inspect and repair the vehicle. In this situation, they need to disconnect the high voltage to prevent electric shock. Therefore, they can control the first switching device 3 and the second switching device 4 to disconnect. After the first switching device 3 and the second switching device 4 are disconnected, the positive control terminal 2A and the negative control terminal 2B of the high-voltage relay of the battery management system 2 become low. At this time, the battery management system 2 can detect that both the positive control terminal 2A and the negative control terminal 2B of the high-voltage relay are at a low level, and can then control the high-voltage relay of the battery to disconnect, thereby cutting off the high-voltage power supply from the battery to the entire vehicle, thus achieving the disconnection of the high voltage for the entire vehicle.

[0050] The battery management system 2 can control the high-voltage relay of the battery to disconnect in the following ways:

[0051] The battery management system 2 sends a high-voltage power-down request to the vehicle controller via CAN (Controller Area Network) signals. After receiving the high-voltage power-down request, the vehicle controller controls the high-voltage relay of the battery to disconnect.

[0052] After the inspection and maintenance are completed, the relevant personnel can control the first switching device 3 and the second switching device 4 to conduct. Then, the battery management system 2 can detect that the positive control terminal 2A and the negative control terminal 2B of the high voltage relay are both at a high level, and can then control the high voltage relay of the battery to close, so that the battery can supply high voltage power to the vehicle.

[0053] In one possible implementation, to simplify user operation, a multi-channel synchronous on / off switching device can be used, such as... Figure 2 As shown, the first switching device 3 and the second switching device 4 can be two branch switches of the first multi-channel synchronous switching device 03. The first multi-channel synchronous switching device 03 has a master control component, which allows the user to simultaneously switch the first switching device 3 and the second switching device 4 on and off by operating the master control component. That is, the user only needs to operate once to simultaneously control the first switching device 3 and the second switching device 4 to be on, or to simultaneously control the first switching device 3 and the second switching device 4 to be off.

[0054] In the event of a vehicle malfunction, maintenance personnel, vehicle owners, and other relevant personnel need to inspect and repair the vehicle. In this situation, the relevant personnel need to disconnect the high voltage of the vehicle to avoid electric shock accidents. Subsequently, the relevant personnel can operate the main control component of the first multi-channel synchronous on / off switch device 03 to control the first switch device 3 and the second switch device 4 to disconnect synchronously.

[0055] After inspection and maintenance are completed, relevant personnel can operate the main control component of the first multi-channel synchronous on / off switch device 03 to control the first switch device 3 and the second switch device 4 to conduct synchronously. Then, the battery management system 2 can detect that the positive control terminal 2A and the negative control terminal 2B of the high voltage relay are both at a high level, and can then control the high voltage relay of the battery to close, so that the battery can supply high voltage power to the vehicle.

[0056] In one possible implementation, to notify the user that the high voltage of the vehicle has been disconnected (also known as the vehicle's high voltage power-off), the high voltage control system for the new energy vehicle provided in this application embodiment may further include a first indicating device. Specifically, the first indicating device is connected to the control terminal of the battery management system. After the battery management system controls the high voltage relay of the battery to disconnect, it controls the first indicating device to issue a first prompt message. The first prompt message is used to notify the user that the high voltage power supply to the vehicle has been disconnected.

[0057] For example, the first indicator device can be an indicator light. Correspondingly, the first indicator device issuing the first prompt message can be the first indicator device lighting up a preset color light in a preset manner, such as a constantly lit green light.

[0058] Alternatively, the first indicator device can be a sound-emitting device. Accordingly, the first indicator device can emit a preset voice message, such as "the high-voltage power supply to the whole vehicle has been cut off" or a buzzer sound.

[0059] Alternatively, the first indicator device can be a display. Correspondingly, the first indicator device can issue a first prompt message or display preset text, such as displaying the text "The high voltage power supply to the whole vehicle has been cut off". The text can be Chinese, English, etc.

[0060] The embodiments of this application do not limit the specific form of the first indicating device and the first prompting information, as long as they can be used to prompt the user when the high voltage power supply to the whole vehicle has been cut off.

[0061] In another possible implementation, the first indicating device can be controlled by a switching device. Specifically, such as... Figure 3As shown, the high-voltage control system also includes a first indicating device 5 and a third switching device 6. The third switching device 6 is a branch switch of the first multi-channel synchronous switching device 03. The first switching device 3, the second switching device 4, and the third switching device 6 are synchronously switched on and off. Specifically, the fifth connection terminal 6A of the third switching device 6 is connected to the second connection terminal 4A of the second switching device 4, the sixth connection terminal 6B of the third switching device 6 is connected to one end of the first indicating device 5, and the other end of the first indicating device 5 is connected to the fourth connection terminal 4B of the second switching device 4.

[0062] Alternatively, the first indicating device 5 and the third switching device 6 can also be connected in the following way:

[0063] The fifth connection terminal 6A of the third switching device 6 is connected to the first connection terminal 3A of the first switching device 3, the sixth connection terminal 6B of the third switching device 6 is connected to one end of the first indicator device 5, and the other end of the first indicator device 5 is connected to the third connection terminal 3B of the first switching device 3.

[0064] For example, the first indicator device 5 can be an indicator light. When the vehicle is running normally, the first switch device 3, the second switch device 4 and the third switch device 6 are all in the on state, and the first indicator device 5 is always lit with a green light.

[0065] In the event of a vehicle malfunction, maintenance personnel, vehicle owners, and other relevant personnel need to inspect and repair the vehicle. In this situation, they need to disconnect the high voltage to prevent electric shock. They can then operate the main control unit of the first multi-channel synchronous on / off switch device 03 to control the synchronous disconnection of the first switch device 3, the second switch device 4, and the third switch device 6. After the third switch device 6 disconnects, the first indicator device 5 goes out. The delay between the disconnection of the first switch device 3, the second switch device 4, and the third switch device 6 and the battery management system's control of the vehicle's high voltage disconnection is extremely short, negligible compared to human reaction time. Therefore, when personnel see the first indicator device 5 go out, they can consider the high voltage disconnection complete and proceed with the inspection and repair.

[0066] above Figures 1-3 The high-voltage control system shown can be applied to test vehicles for use by technicians, or to commercial vehicles for use by drivers or maintenance personnel.

[0067] In one possible implementation, where the high-voltage control system is applied to a test vehicle of hybrid electric vehicles, plug-in hybrid electric vehicles, or range-extended electric vehicles, the high-voltage control system also includes an auxiliary power supply 7, an electronic control unit 8, and a fourth switching device 9. See also Figure 4The fourth switching device 9 is a branch switch of the multi-channel synchronous switching device 03, and the first switching device 3, the second switching device 4, the third switching device 6, and the fourth switching device 9 are switched on and off synchronously. The auxiliary power supply 7 is connected to the seventh connection terminal 9A of the fourth switching device 9, and the eighth connection terminal 9B of the fourth switching device 9 is connected to the auxiliary power supply terminal 8A of the electronic control unit 8.

[0068] Auxiliary power supply 7, also known as K15 power supply, is used to power the electronic control unit. On the test vehicle, due to the need to investigate more risks and faults, for ease of operation, the ECU can also be de-energized at the same time as the high voltage is disconnected.

[0069] Specifically, the vehicle tester can operate the main control unit of the first multi-channel synchronous switching device 03 to control the first switching device 3, the second switching device 4, the third switching device 6, and the fourth switching device 9 to disconnect synchronously. When relevant personnel see the first indicator device 5 turn off, they can consider that the high voltage disconnection of the whole vehicle has been completed and inspection and maintenance can be performed.

[0070] In one possible implementation, when the high-voltage control system is applied to commercial vehicles of hybrid models such as hybrid electric vehicles, plug-in hybrid electric vehicles, and range-extended electric vehicles, Figure 4 Based on this, the high-voltage control system may also include a fifth switching device 10 and a sixth switching device 11.

[0071] The fifth switching device 10 is connected in series with the first switching device 3, and the sixth switching device 11 is connected in series with the second switching device 4.

[0072] The driver or maintenance personnel can disconnect the high voltage of the entire vehicle by controlling the fifth switch device 10 and the sixth switch device 11 to disconnect them without affecting the electronic control unit.

[0073] In one possible implementation, see Figure 5 The high-voltage control system may also include a second multi-channel synchronous switching device 04, a fifth switching device 10 and a sixth switching device 11, which are both branch switches of the second multi-channel synchronous switching device 04, and the fifth switching device 10 and the sixth switching device 11 are synchronously switched on and off.

[0074] In one possible implementation, Figure 5 Based on this, in order to inform the driver that the high voltage of the entire vehicle has been disconnected, and to distinguish between the first multi-channel synchronous on / off switch device 03 and the second multi-channel synchronous on / off switch device 04 so that different personnel can perform different operations, a second indicator device can be set. Specifically, such as... Figure 6As shown, the high-voltage control system also includes a second indicating device 12 and a seventh switching device 13. The seventh switching device 13 is a branch switch of the second multi-channel synchronous switching device 04. The fifth switching device 10, the sixth switching device 11, and the seventh switching device 13 are synchronously switched on and off. Among them, the seventh switching device 13 is connected in parallel with the second switching device 4 and in series with the second indicating device 12.

[0075] For example, the second indicator device 12 can be an indicator light. When the vehicle is running normally, the fifth switch device 10, the sixth switch device 11, and the seventh switch device 13 are all in the on state, and the second indicator device 12 is constantly lit with a yellow light. When the second indicator device 12 and the first indicator device 5 are constantly lit, they can light up different colors to distinguish the first multi-channel synchronous on / off switch device 03 and the second multi-channel synchronous on / off switch device 04.

[0076] In one possible implementation, such as Figure 7 As shown, the constant power supply 1 is connected to the constant power supply terminal 2C of the battery management system 2.

[0077] In one possible implementation, a fuse, such as a circuit breaker, can be connected in series in the circuit connecting the constant power supply 1, the auxiliary power supply 7, and each switching device to protect the circuit safety.

[0078] In one possible implementation, such as Figure 8 As shown, the high-voltage control system may also include a first AND gate circuit 100. The first input terminal 100A of the first AND gate circuit 100 is connected to the first switching device 3, the second input terminal 100B of the first AND gate circuit 100 is connected to the second switching device 4, and the output terminal 100C of the first AND gate circuit 100 is connected to the positive control terminal 2A and the negative control terminal 2B of the high-voltage relay, respectively.

[0079] If one of the first switching devices 3 and the second switching device 4 fails and cannot be disconnected, as long as one of the switching devices can be disconnected normally, the first AND gate circuit 100 can output a low level when the switching device is disconnected, so that the positive control terminal 2A and the negative control terminal 2B of the high voltage relay both become low level.

[0080] like Figure 9 As shown, the high-voltage control system may also include a second AND gate circuit 200. The first input terminal 200A of the second AND gate circuit 200 is connected to the fifth switching device 10, the second input terminal 200B of the second AND gate circuit 200 is connected to the sixth switching device 11, and the output terminal 200C of the second AND gate circuit 200 is connected to the positive control terminal 2A and the negative control terminal 2B of the high-voltage relay, respectively.

[0081] If one of the fifth switching devices 10 and the sixth switching device 11 fails and cannot be disconnected, as long as one of the switching devices can be disconnected normally, the second AND gate circuit 200 can output a low level when the switching device is disconnected, so that the positive control terminal 2A and the negative control terminal 2B of the high voltage relay both become low level.

[0082] In the technical solution provided in this application, two switching devices are introduced. One switching device is installed between the constant power supply and the positive control terminal of the high-voltage relay in the battery management system, and the other switching device is installed between the constant power supply and the negative control terminal of the high-voltage relay in the battery management system. When relevant personnel need to disconnect the high voltage of the vehicle, they can manually disconnect these two switching devices. Then, the battery management system can detect that both the positive and negative control terminals of the high-voltage relay have changed from a high level to a low level, and control the high-voltage relay of the battery to disconnect, so as to cut off the high voltage power supply of the battery to the vehicle.

[0083] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0084] It is understood that in this application, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0085] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this application, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0086] It is further understood that the terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “up,” “down,” “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 only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0087] It is further understood that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the two components; they can refer to a direct connection between two components without the presence of other components, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0088] It is further understood that although the operations are described in a specific order in the accompanying drawings in the embodiments of this application, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all the operations shown to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0089] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the scope of claims.

[0090] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A high-voltage control system for a new energy vehicle, characterized in that, The high-voltage control system includes a constant power supply (1), a battery management system (2), a first multi-channel synchronous switching device (03), and a first indicating device (5). The first multi-channel synchronous switching device (03) includes a first switching device (3), a second switching device (4), and a third switching device (6). The first switching device (3), the second switching device (4), and the third switching device (6) are all branch switches of the first multi-channel synchronous switching device (03). The first switching device (3), the second switching device (4), and the third switching device (6) are synchronously switched on and off, wherein: The fifth connection terminal (6A) of the third switching device (6) is connected to the second connection terminal (4A) of the second switching device (4), the sixth connection terminal (6B) of the third switching device (6) is connected to one end of the first indicator device (5), and the other end of the first indicator device (5) is connected to the fourth connection terminal (4B) of the second switching device (4); or, the fifth connection terminal (6A) of the third switching device (6) is connected to the first connection terminal (3A) of the first switching device (3), the sixth connection terminal (6B) of the third switching device (6) is connected to one end of the first indicator device (5), and the other end of the first indicator device (5) is connected to the third connection terminal (3B) of the first switching device (3); The constant power supply (1) is connected to the first connection terminal (3A) of the first switching device (3) and the second connection terminal (4A) of the second switching device (4); The third connection terminal (3B) of the first switching device (3) is connected to the positive control terminal (2A) of the high voltage relay of the battery management system (2); The fourth connection terminal (4B) of the second switching device (4) is connected to the negative control terminal (2B) of the high voltage relay of the battery management system (2); The battery management system (2) is used to control the high voltage relay of the battery to disconnect when the positive control terminal (2A) and the negative control terminal (2B) of the high voltage relay are detected to be at a low level, so as to cut off the high voltage power supply of the whole vehicle.

2. The high-voltage control system according to claim 1, characterized in that, The new energy vehicle mentioned is a pure electric vehicle.

3. The high-voltage control system according to claim 2, characterized in that, The high-voltage control system also includes an auxiliary power supply (7) and an electronic control unit (8), wherein: The auxiliary power supply (7) and the auxiliary power supply terminal (8A) of the electronic control unit (8) are connected.

4. The high-voltage control system according to claim 1, characterized in that, The new energy vehicle mentioned is a hybrid vehicle.

5. The high-voltage control system according to claim 4, characterized in that, The high-voltage control system further includes an auxiliary power supply (7), an electronic control unit (8), and a fourth switching device (9). The fourth switching device (9) is a branch switch of the first multi-channel synchronous switching device (03). The first switching device (3), the second switching device (4), the third switching device (6), and the fourth switching device (9) are synchronously switched on and off, wherein: The auxiliary power supply (7) is connected to the seventh connection terminal (9A) of the fourth switching device (9); The eighth connection terminal (9B) of the fourth switching device (9) is connected to the auxiliary power supply terminal (8A) of the electronic control unit (8).

6. The high-voltage control system according to claim 5, characterized in that, The high-voltage control system further includes a fifth switching device (10) and a sixth switching device (11), wherein: The fifth switching device (10) is connected in series with the first switching device (3); The sixth switching device (11) is connected in series with the second switching device (4).

7. The high-voltage control system according to claim 6, characterized in that, The high-voltage control system also includes a second multi-channel synchronous switching device (04), and the fifth switching device (10) and the sixth switching device (11) are both branch switches of the second multi-channel synchronous switching device (04). The fifth switching device (10) and the sixth switching device (11) are synchronously switched on and off.

8. The high-voltage control system according to any one of claims 1-7, characterized in that, The constant power supply (1) is connected to the constant power supply terminal (2C) of the battery management system (2).

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