High-voltage interlocking system, high-voltage interlocking detection method and vehicle

Abstract

The invention discloses a high-voltage interlocking system, a high-voltage interlocking detection method and a vehicle. The high-voltage interlocking system comprises a plurality of high-voltage interlocking loops and a controller, and the high-voltage interlocking loops are connected in parallel and connected with the controller in series. Each high-voltage interlocking loop comprises at least one high-voltage load; the plurality of high voltage interlock loops includes a power battery interlock loop, a charging interlock loop, a drive interlock loop, a high voltage accessory interlock loop, and a thermal management interlock loop. According to the scheme, when the high-voltage interlocking system has the interlocking fault, the high-voltage interlocking loop with the fault can be accurately identified, so that the troubleshooting range is narrowed, the troubleshooting efficiency is improved, and the timeliness and the accuracy of positioning the interlocking fault position are improved; moreover, the high-voltage interlocking loops are mutually independent, the execution of the functions of the high-voltage interlocking loops cannot be affected by interlocking faults of other interlocking loops, and the high-voltage interlocking detection of the whole vehicle can be safely and reliably realized.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of new energy vehicles, and in particular to a high-voltage interlocking system, a high-voltage interlocking detection method and a vehicle. Background Art

[0002] The high-voltage interlocking circuit is a technical solution for testing the safety and reliability of high-voltage connection devices. The purpose of the high-voltage interlocking circuit is to confirm the integrity of the entire high-voltage system. Most of the existing high-voltage interlocking circuits of new energy commercial vehicles are one circuit or two circuits for the entire vehicle. The high-voltage interlocking circuit is not divided finely enough, and the functions of the entire vehicle are not independently partitioned, which will cause problems such as mutual influence and difficulty in locating the fault location. Summary of the invention

[0003] Based on the above-mentioned defects of the prior art, the embodiments of the present invention provide a high-voltage interlocking system, a high-voltage interlocking detection method and a vehicle to avoid mutual influence of different high-voltage interlocking circuits of the whole vehicle, so as to facilitate timely and accurate positioning of the fault position.

[0004] In a first aspect, an embodiment of the present invention provides a high-voltage interlocking system, comprising a plurality of high-voltage interlocking circuits and a controller, wherein the plurality of high-voltage interlocking circuits are connected in parallel with each other and are respectively connected in series with the controller; each high-voltage interlocking circuit comprises at least one high-voltage load;

[0005] The multiple high-voltage interlocking circuits include a power battery interlocking circuit, a charging interlocking circuit, a driving interlocking circuit, a high-voltage accessory interlocking circuit, and a thermal management interlocking circuit; the power battery interlocking circuit includes a power battery load, the charging interlocking circuit includes a charging load, the driving interlocking circuit includes a driving load, the high-voltage accessory interlocking circuit includes a high-voltage accessory load, and the thermal management interlocking circuit includes a thermal management load;

[0006] The controller is used for performing high voltage interlock detection on multiple high voltage interlock circuits.

[0007] In a second aspect, an embodiment of the present invention further provides a high-voltage interlock detection method, which is applicable to a high-voltage interlock system adopted by any embodiment of the present invention, and the high-voltage interlock detection method includes:

[0008] Perform high voltage interlock detection on multiple high voltage interlock circuits.

[0009] In a third aspect, an embodiment of the present invention further provides a vehicle, comprising a high-voltage interlocking system according to any embodiment of the present invention.

[0010] The high-voltage interlocking system provided in the embodiment of the present invention divides the high-voltage interlocking circuit of the whole vehicle according to function, and divides it into multiple high-voltage interlocking circuits including five circuits: power battery interlocking circuit, charging interlocking circuit, drive interlocking circuit, high-voltage accessory interlocking circuit and thermal management interlocking circuit. Multiple high-voltage interlocking circuits are connected in parallel with each other and are respectively connected in series with the controller; the controller can perform high-voltage interlocking detection on multiple high-voltage interlocking circuits. Through the above scheme, when an interlocking fault occurs in the high-voltage interlocking system, the high-voltage interlocking circuit with the fault can be accurately identified, thereby narrowing the scope of investigation, improving the efficiency of investigation, and improving the timeliness and accuracy of locating the interlocking fault position; and each high-voltage interlocking circuit is independent of each other, and will not affect the execution of its own function due to the interlocking fault of other interlocking circuits, and can safely and reliably realize the high-voltage interlocking detection of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic structural diagram of a high voltage interlocking system provided by an embodiment of the present invention;

[0012] Figure 2 A vehicle internal high voltage topology diagram provided by an embodiment of the present invention;

[0013] Figure 3 A schematic diagram of the structure of a high-voltage interlocking circuit provided by an embodiment of the present invention;

[0014] Figure 4 A schematic flow chart of a high-voltage interlock detection method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0016] It should be mentioned before discussing exemplary embodiments in more detail that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe various operations (or steps) as sequential processes, many operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of various operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to methods, functions, procedures, subroutines, subprograms, etc. In addition, the embodiments in the present invention and the features in the embodiments can be combined with each other without conflict.

[0017] The term “including” and its variations used in the present invention are open inclusions, that is, “including but not limited to.” The term “based on” means “based at least in part on.” The term “one embodiment” means “at least one embodiment.”

[0018] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish the corresponding contents, and are not used to limit the order or interdependence.

[0019] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0020] Figure 1 The structure diagram of a high-voltage interlocking system provided by an embodiment of the present invention is shown in FIG. 1 , which can be applied to new energy vehicles, including but not limited to new energy commercial vehicles. Figure 1 As shown, the high-voltage interlocking system provided by the embodiment of the present invention includes multiple high-voltage interlocking circuits 100 and a controller 200. The multiple high-voltage interlocking circuits 100 are connected in parallel with each other and are respectively connected in series with the controller 200; each high-voltage interlocking circuit 100 includes at least one high-voltage load; the multiple high-voltage interlocking circuits 100 include a power battery interlocking circuit 10, a charging interlocking circuit 20, a driving interlocking circuit 30, a high-voltage accessory interlocking circuit 40 and a thermal management interlocking circuit 50; the power battery interlocking circuit 10 includes a power battery load (not shown in the figure), the charging interlocking circuit 20 includes a charging load (not shown in the figure), the driving interlocking circuit 30 includes a driving load (not shown in the figure), the high-voltage accessory interlocking circuit 40 includes a high-voltage accessory load (not shown in the figure), and the thermal management interlocking circuit 50 includes a thermal management load (not shown in the figure); the controller 200 is used to perform high-voltage interlock detection on multiple high-voltage interlocking circuits 100.

[0021] like Figure 1 As shown, in the embodiment of the present invention, the vehicle high-voltage interlocking circuit 100 can be divided according to function, and multiple high-voltage interlocking circuits 100 including a power battery interlocking circuit 10, a charging interlocking circuit 20, a driving interlocking circuit 30, a high-voltage accessory interlocking circuit 40 and a thermal management interlocking circuit 50 are divided. The high-voltage loads in each high-voltage interlocking circuit 100 perform the same or related functions.

[0022] Continue to refer Figure 1By setting each high-voltage interlocking circuit 100 in parallel, each high-voltage interlocking circuit 100 can be made independent of each other, and the high-voltage interlocking circuit 100 will not be affected by the interlocking failure of other interlocking circuits. Each high-voltage interlocking circuit 100 is connected in series with the detection circuit of the controller 200, so that the controller 200 is used to perform high-voltage interlock detection on each high-voltage interlocking circuit 100. Among them, the controller 200 can be a vehicle control unit (VCU), but is not limited to this.

[0023] Since the high-voltage interlocking circuits 100 are arranged in parallel, when the high-voltage connector connection in a high-voltage interlocking circuit 100 is unreliable, that is, an interlocking fault occurs, the controller 200 can accurately identify the high-voltage interlocking circuit 100 with the interlocking fault, so as to accurately locate the interlocking fault position and improve the troubleshooting efficiency.

[0024] The specific method of the controller 200 for high-voltage interlock detection is not limited, and those skilled in the art can set it according to actual needs. For example, the controller 200 can send a detection signal to each high-voltage interlock circuit 100, and the detection signal passes through each high-voltage interlock circuit 100 along the detection circuit. If the feedback signal of any high-voltage interlock circuit 100 is abnormal, it means that the high-voltage interlock circuit 100 is abnormally connected and there is an interlock fault.

[0025] Among them, the high-voltage load in the power battery interlocking circuit 10 includes but is not limited to the power battery load, and the power battery load may refer to the power battery assembly. The high-voltage load in the charging interlocking circuit 20 includes but is not limited to the charging load, and the charging load may refer to the charging unit, such as an on-board charger. The high-voltage load in the drive interlocking circuit 30 includes but is not limited to the drive load, and the drive load may refer to a power motor, etc. The high-voltage load in the high-voltage accessory interlocking circuit 40 includes but is not limited to the high-voltage accessory load, and the high-voltage accessory load may refer to some high-voltage accessories in the vehicle, such as an oil pump motor and an air pump motor, etc. The high-voltage load in the thermal management interlocking circuit 50 includes but is not limited to the thermal management load, and the thermal management load may include a PTC heating component and an air conditioning system component, etc.

[0026] Optionally, the high-voltage interlocking system may also include other interlocking circuits. It is understandable that the finer the interlocking circuit division in the high-voltage interlocking system, the more accurate the interlocking fault location, but the corresponding line design is more loaded. In actual application, which high-voltage loads are specifically included in each of the above-mentioned high-voltage interlocking circuits can be set by the staff according to actual needs.

[0027] For example, for some new energy commercial vehicles, the high-voltage system also includes a body system. In this case, the high-voltage interlocking system may also include a body interlocking circuit, and the body interlocking circuit includes a body load.

[0028] The high-voltage interlocking system provided in the embodiment of the present invention divides the high-voltage interlocking circuit of the whole vehicle according to function, and divides it into multiple high-voltage interlocking circuits including five circuits: power battery interlocking circuit, charging interlocking circuit, drive interlocking circuit, high-voltage accessory interlocking circuit and thermal management interlocking circuit. Multiple high-voltage interlocking circuits are connected in parallel with each other and are respectively connected in series with the controller; the controller can perform high-voltage interlocking detection on multiple high-voltage interlocking circuits. Through the above scheme, when an interlocking fault occurs in the high-voltage interlocking system, the high-voltage interlocking circuit with the fault can be accurately identified, thereby narrowing the scope of investigation, improving the efficiency of investigation, and improving the timeliness and accuracy of locating the interlocking fault position; and each high-voltage interlocking circuit is independent of each other, and will not affect the execution of its own function due to the interlocking fault of other interlocking circuits, and can safely and reliably realize the high-voltage interlocking detection of the whole vehicle.

[0029] On the basis of the above embodiment, the present invention further proposes a variant embodiment of the above embodiment. It should be noted that, in order to make the description concise, only the differences from the above embodiment are described in the variant embodiment.

[0030] Figure 2 A vehicle internal high voltage topology diagram provided by an embodiment of the present invention, such as Figure 2 As shown, in some embodiments, the high-voltage load in the vehicle may include three power battery units 101, two charging units 201, two power motor units 301, a DC converter 401, an oil pump 402, an air pump 403, a high-pressure water pump 501, a high-pressure fan 502, an air conditioning compressor 503 and a PTC heating component 504. The power battery unit 101, the two charging units 201, the power motor unit 301, the DC converter 401, the oil pump 402, the air pump 403, the high-pressure water pump 501, the high-pressure fan 502, the air conditioning compressor 503 and the PTC heating component 504 are electrically connected to the high-voltage distribution box through a high-voltage wire harness. The high-voltage connector, high-voltage copper bus, high-voltage wire harness and switch assembly (K1-K11) in the high-voltage distribution box supply the high-voltage direct current of the power battery unit 101 to each high-voltage load.

[0031] Among them, the power battery unit 101 is used to provide electrical energy for the vehicle; the charging unit provides electricity from the power grid to the power unit to perform DC charging for the vehicle; the power motor unit 301 is used to realize the driving of the vehicle. The oil pump 402 is used to realize the steering of the vehicle; the air pump 403 is used to realize the braking of the vehicle; the DC converter 401 is used to realize the conversion of the high-voltage DC power of the power battery unit 101 into low-voltage DC power to charge the battery; the high-pressure water pump 501 and the high-pressure fan 502 are used to realize the thermal management related functions of the vehicle; the air-conditioning compressor 503 is used to realize the cooling function of the vehicle cab; the PTC heating component 504 is used to realize the heating function of the vehicle cab. The embodiment of the present invention does not limit the number of the above-mentioned high-voltage loads, Figure 2These are examples only.

[0032] The vehicle high voltage system may also include any components, such as a hand-pull maintenance switch 102 and a Hall unit 103 connected in series with the power battery unit 101 in a one-to-one correspondence, and an insulation tester 104 connected between the hand-pull maintenance switch 102 and the Hall unit 103, but is not limited thereto.

[0033] Based on the above-mentioned high-voltage topology structure, in an embodiment of the present invention, the power battery load includes three power battery units 101, the charging load includes two charging units 201, the driving load includes two power motor units 301, the high-voltage accessory load includes a DC converter 401, an air pump 403 and an oil pump 402, and the thermal management load includes a high-pressure water pump 501, a high-pressure fan 502, an air-conditioning compressor 503 and a PTC heating component 504.

[0034] The three power battery units 101 are divided into the power battery interlocking circuit 10, the two charging units 201 are divided into the charging interlocking circuit 20, the two power motor units 301 are divided into the driving interlocking circuit 30, the DC converter 401, the air pump 403 and the oil pump 402 are divided into the high-voltage accessory interlocking circuit 40, and the high-voltage water pump 501, the high-voltage fan 502, the air conditioning compressor 503 and the PTC heating component 504 are divided into the thermal management interlocking circuit 50. Thus, the high-voltage interlocking circuit is divided according to the function of the high-voltage load.

[0035] Figure 3 A schematic diagram of a high voltage interlocking circuit provided in an embodiment of the present invention can be referred to Figure 3 In a possible embodiment, the high voltage load includes a high voltage interlock pin 1 , and a plurality of high voltage interlock pins 1 in the same high voltage interlock circuit 100 are connected in series through a low voltage wiring harness 2 .

[0036] As described above, the high-voltage load is connected to the high-voltage distribution box through a high-voltage wiring harness. Each high-voltage load and the connected high-voltage wiring harness must have a high-voltage interlock pin 1. The high-voltage interlock pin 1 of each high-voltage load and high-voltage wiring harness includes a high-voltage interlock input 1a and a high-voltage interlock output 1b. The high-voltage interlock pins 1 in the same high-voltage interlock loop 100 are connected in series through a low-voltage wiring harness 2, so that all high-voltage interlock pins 1 of the same high-voltage interlock loop 100 are connected in series using the low-voltage wiring harness 2 to form a closed loop.

[0037] Optional, you can continue to refer to Figure 1 and Figure 3 In a possible embodiment, the two ends of the same high-voltage interlocking circuit 100 respectively include an interlocking input pin 3 and an interlocking output pin 4 , and the interlocking input pin 3 and the interlocking output pin 4 are electrically connected to the controller 200 .

[0038] like Figure 1 and Figure 3 As shown, after the series connection, the entire high-voltage interlock circuit 100 has an interlock input pin 3 and an interlock output pin 4, a total of two low-voltage pins, which are connected to the controller 200, and the controller 200 performs high-voltage interlock detection.

[0039] Optionally, in a possible embodiment, the controller includes a fault detection module and a fault handling module; the fault detection module is used to determine whether an interlocking fault occurs in each high-voltage interlocking circuit and identify the high-voltage interlocking circuit with an interlocking fault; the fault handling module is used to execute a corresponding fault handling strategy according to the high-voltage interlocking circuit with an interlocking fault.

[0040] The fault detection module can be electrically connected to each high-voltage interlocking circuit, so as to send a detection signal to the high-voltage interlocking circuit and receive a feedback signal, and then determine whether there is a high-voltage interlocking pin with an unreliable connection according to the feedback signal. When there is a high-voltage interlocking pin with an unreliable connection, an interlocking fault is determined and occurs, and the high-voltage interlocking circuit with the interlocking fault is identified. Then the fault handling module executes the corresponding fault handling strategy according to the identified faulty high-voltage interlocking circuit.

[0041] Among them, the controller can pre-store fault handling strategies corresponding to interlocking faults in different high-voltage interlocking circuits. When an interlocking fault in a high-voltage interlocking circuit is identified, the corresponding fault handling strategy is directly executed.

[0042] Optional, for reference Figure 2 In a possible embodiment, the charging load is electrically connected to the power battery load through the first switch assembly 60, the driving load is electrically connected to the power battery load through the second switch assembly 70, the high-voltage accessory load is electrically connected to the power battery load through the third switch assembly 80, and the thermal management load is electrically connected to the power battery load through the fourth switch assembly 90; the fault processing module is used to: when an interlocking fault occurs in the power battery interlock circuit 10, control the whole vehicle to lower the high voltage, and control the second switch assembly 70, the third switch assembly 80 and the fourth switch assembly 90 to be all disconnected; when an interlocking fault occurs in the charging interlock circuit 20, disable the charging circuit, and control the second switch assembly 70 to be disconnected; when an interlocking fault occurs in the driving interlock circuit 30, control the whole vehicle to be prohibited from driving, and control the second switch assembly 70 to be disconnected; when an interlocking fault occurs in the high-voltage accessory interlock circuit 40, control the whole vehicle to lower the high voltage, and control the second switch assembly 70, the third switch assembly 80 and the fourth switch assembly 90 to be all disconnected; when an interlocking fault occurs in the thermal management interlock circuit 50, disable the thermal management system, and control the fourth switch assembly 90 to be disconnected.

[0043] like Figure 2As shown, in this embodiment, the vehicle high-voltage load main circuit may include a relay K1, and the first switch assembly 60 may include a relay K8, a relay K9, a relay K10, and a relay K11. The second switch assembly 70 includes a relay K2 and a relay K3. The third switch assembly 80 includes a relay K4 and a relay K5. The fourth switch assembly 90 includes a relay K6 and a relay K7. Among them, the relay K2, the relay K4, and the relay K6 may be normally open relays.

[0044] When an interlocking fault occurs in the power battery interlock circuit 10, the fault handling module controls the whole vehicle to reduce high voltage and controls all relays K1-K7 to be disconnected; when an interlocking fault occurs in the charging interlock circuit 20, the fault handling module controls the charging circuit to be disabled and controls relays K8-K11 to be disconnected, and the other relays can be closed normally; when an interlocking fault occurs in the drive interlock circuit 30, the whole vehicle is prohibited from driving, relay K3 is disconnected, and the other relays can be closed normally; when an interlocking fault occurs in the high-voltage accessory interlock circuit 40, the whole vehicle is controlled to reduce high voltage and control all relays K1-K7 to be disconnected; when an interlocking fault occurs in the thermal management interlock circuit 50, the thermal management system is controlled to be disabled, and relay K7 is controlled to be disconnected, and the other relays can be closed normally.

[0045] By executing the above-mentioned different fault handling strategies on different high-voltage interlocking circuits, the connectivity of the fault interlocking circuit can be cut off without affecting the functions of other circuits.

[0046] Based on the same concept, an embodiment of the present invention further provides a high voltage interlock detection method, which is applicable to the high voltage interlock system provided by any embodiment of the present invention. The high voltage interlock detection method can be executed by a controller in the high voltage interlock system.

[0047] The high-voltage interlock detection method provided by the embodiment of the present invention includes: performing high-voltage interlock detection on multiple high-voltage interlock circuits.

[0048] Through the above scheme, when an interlocking fault occurs in the high-voltage interlocking system, the faulty high-voltage interlocking circuit can be accurately identified, thereby narrowing the scope of investigation, improving the troubleshooting efficiency, and enhancing the timeliness and accuracy of locating the interlocking fault position; and each high-voltage interlocking circuit is independent of each other, and will not be affected by the interlocking fault of other interlocking circuits. The execution of its own function will not be affected, and the high-voltage interlocking detection of the entire vehicle can be realized safely and reliably.

[0049] Optional, Figure 4 A schematic diagram of a flow chart of a high voltage interlock detection method provided by an embodiment of the present invention, Figure 4The embodiment shown is a refinement of the above embodiment. The above embodiment (high-voltage interlock detection of multiple high-voltage interlock circuits) can be embodied as follows: determining whether each high-voltage interlock circuit has an interlock fault and identifying the high-voltage interlock circuit with an interlock fault; and executing a corresponding fault handling strategy according to the high-voltage interlock circuit with an interlock fault. Figure 4 , the high voltage interlock detection method comprises:

[0050] S110, determining whether each high-voltage interlocking circuit has an interlocking fault and identifying the high-voltage interlocking circuit having the interlocking fault.

[0051] S120: Execute a corresponding fault handling strategy according to the high-voltage interlocking circuit where the interlocking fault occurs.

[0052] The fault detection module can be electrically connected to each high-voltage interlocking circuit, so as to send a detection signal to the high-voltage interlocking circuit and receive a feedback signal, and then determine whether there is a high-voltage interlocking pin with an unreliable connection according to the feedback signal. When there is a high-voltage interlocking pin with an unreliable connection, an interlocking fault is determined and occurs, and the high-voltage interlocking circuit with the interlocking fault is identified. Then the fault handling module executes the corresponding fault handling strategy according to the identified faulty high-voltage interlocking circuit.

[0053] Optionally, in a possible embodiment, the charging load is electrically connected to the power battery load through the first switch assembly, the driving load is electrically connected to the power battery load through the second switch assembly, the high-voltage accessory load is electrically connected to the power battery load through the third switch assembly, and the thermal management load is electrically connected to the power battery load through the fourth switch assembly; (S120) in the above embodiment can be concretized as follows: when an interlocking fault occurs in the power battery interlock circuit, the whole vehicle is controlled to lower the high voltage, and the second switch assembly, the third switch assembly and the fourth switch assembly are controlled to be all disconnected; when an interlocking fault occurs in the charging interlock circuit, the charging circuit is disabled, and the second switch assembly is controlled to be disconnected; when an interlocking fault occurs in the driving interlock circuit, the whole vehicle is controlled to be prohibited from driving, and the second switch assembly is controlled to be disconnected; when an interlocking fault occurs in the high-voltage accessory interlock circuit, the whole vehicle is controlled to lower the high voltage, and the second switch assembly, the third switch assembly and the fourth switch assembly are controlled to be all disconnected; when an interlocking fault occurs in the thermal management interlock circuit, the thermal management system is disabled, and the fourth switch assembly is controlled to be disconnected.

[0054] The high-voltage interlock detection method provided in an embodiment of the present invention has all the technical features and corresponding beneficial effects of the high-voltage interlock system provided in any embodiment of the present invention. For the contents not fully described in the detection method, reference can be made to the corresponding embodiments of the high-voltage interlock system.

[0055] An embodiment of the present invention provides a vehicle, including the high-voltage interlocking system provided by any embodiment of the present invention, and the vehicle may be a new energy vehicle, for example, a new energy commercial vehicle. The vehicle provided by the embodiment of the present invention has all the technical features and corresponding beneficial effects of the high-voltage interlocking system provided by any embodiment of the present invention, which will not be described in detail here.

[0056] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A high voltage interlocking system, characterized in that: It comprises a plurality of high-voltage interlocking circuits and a controller, wherein the plurality of high-voltage interlocking circuits are connected in parallel with each other and are respectively connected in series with the controller; each of the high-voltage interlocking circuits comprises at least one high-voltage load; The plurality of high-voltage interlocking circuits include a power battery interlocking circuit, a charging interlocking circuit, a driving interlocking circuit, a high-voltage accessory interlocking circuit, and a thermal management interlocking circuit; the power battery interlocking circuit includes a power battery load, the charging interlocking circuit includes a charging load, the driving interlocking circuit includes a driving load, the high-voltage accessory interlocking circuit includes a high-voltage accessory load, and the thermal management interlocking circuit includes a thermal management load; The controller is used for performing high voltage interlock detection on the plurality of high voltage interlock circuits.

2. The high voltage interlocking system according to claim 1, characterized in that: The power battery load includes three power battery units, the charging load includes two charging units, the driving load includes two power motor units, the high-voltage accessory load includes a DC converter, an air pump and an oil pump, and the thermal management load includes a high-pressure water pump, a high-pressure fan, an air-conditioning compressor and a PTC heating component.

3. The high voltage interlocking system according to claim 1, characterized in that: The high-voltage load includes a high-voltage interlock pin, and a plurality of the high-voltage interlock pins in the same high-voltage interlock loop are connected in series through a low-voltage wiring harness.

4. The high voltage interlocking system according to claim 1, characterized in that: The two ends of the same high-voltage interlocking loop respectively include an interlocking input pin and an interlocking output pin, and the interlocking input pin and the interlocking output pin are electrically connected to the controller.

5. The high voltage interlocking system according to claim 1, characterized in that: The controller includes a fault detection module and a fault processing module; The fault detection module is used to determine whether each high-voltage interlocking circuit has an interlocking fault and identify the high-voltage interlocking circuit with an interlocking fault; The fault processing module is used to execute a corresponding fault processing strategy according to the high-voltage interlocking circuit where an interlocking fault occurs.

6. The high voltage interlocking system according to claim 5, characterized in that: The charging load is electrically connected to the power battery load through a first switch assembly, the driving load is electrically connected to the power battery load through a second switch assembly, the high-voltage accessory load is electrically connected to the power battery load through a third switch assembly, and the thermal management load is electrically connected to the power battery load through a fourth switch assembly; The fault processing module is used to: when an interlocking fault occurs in the power battery interlock circuit, control the whole vehicle to lower the high voltage, and control the second switch assembly, the third switch assembly and the fourth switch assembly to be all disconnected; when an interlocking fault occurs in the charging interlock circuit, disable the charging circuit, and control the second switch assembly to be disconnected; when an interlocking fault occurs in the drive interlock circuit, control the whole vehicle to be prohibited from driving, and control the second switch assembly to be disconnected; when an interlocking fault occurs in the high-voltage accessory interlock circuit, control the whole vehicle to lower the high voltage, and control the second switch assembly, the third switch assembly and the fourth switch assembly to be all disconnected; when an interlocking fault occurs in the thermal management interlock circuit, disable the thermal management system, and control the fourth switch assembly to be disconnected.

7. A high voltage interlock detection method, characterized in that: Applicable to the high-voltage interlocking system according to any one of claims 1 to 6, the high-voltage interlocking detection method comprising: Perform high voltage interlock detection on multiple high voltage interlock circuits.

8. The high voltage interlock detection method according to claim 7, characterized in that: High voltage interlock detection for multiple high voltage interlock circuits, including: Determining whether each of the high-voltage interlocking circuits has an interlocking fault and identifying the high-voltage interlocking circuit having an interlocking fault; A corresponding fault handling strategy is executed according to the high-voltage interlocking circuit where the interlocking fault occurs.

9. The high voltage interlock detection method according to claim 8, characterized in that: The charging load is electrically connected to the power battery load through the first switch assembly, the driving load is electrically connected to the power battery load through the second switch assembly, the high-voltage accessory load is electrically connected to the power battery load through the third switch assembly, and the thermal management load is electrically connected to the power battery load through the fourth switch assembly; Executing a corresponding fault handling strategy according to the high-voltage interlocking circuit having an interlocking fault, including: When an interlocking fault occurs in the power battery interlock circuit, the whole vehicle is controlled to be under high voltage, and the second switch assembly, the third switch assembly and the fourth switch assembly are controlled to be all disconnected; when an interlocking fault occurs in the charging interlock circuit, the charging circuit is disabled, and the second switch assembly is controlled to be disconnected; when an interlocking fault occurs in the drive interlock circuit, the whole vehicle is controlled to be prohibited from driving, and the second switch assembly is controlled to be disconnected; when an interlocking fault occurs in the high-voltage accessory interlock circuit, the whole vehicle is controlled to be under high voltage, and the second switch assembly, the third switch assembly and the fourth switch assembly are controlled to be all disconnected; when an interlocking fault occurs in the thermal management interlock circuit, the thermal management system is disabled, and the fourth switch assembly is controlled to be disconnected.

10. A vehicle, characterized in that: A high voltage interlocking system comprising any one of claims 1-6.

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