A high voltage on-off power system, device and method

Abstract

The application provides a high-voltage power-on and power-off system, device and method, and relates to the field of electric control of new energy vehicles. The application comprises five states of a wake-up controller, a closed relay, high-voltage establishment, a closed high-voltage device and power-off hibernation, and the system is converted between the states through satisfaction of specific conditions, so that the problems of high complexity, poor scalability and high system development cost of the high-voltage power-on and power-off function circle of the new energy vehicle domain control system can be solved; the application sets unified fault monitoring conditions, fault time thresholds and calibration quantities, and introduces the concepts of a fault confirmation flag bit and an additional fault time threshold, so that more accurate and reliable fault diagnosis and processing are realized.

Description

A high-voltage power supply and discharge system, equipment and method Technical Field

[0001] This invention relates to the field of electronic control for new energy vehicles, and more specifically, to a high-voltage power supply and discharge system, equipment, and method. Background Technology

[0002] New energy vehicles refer to automobiles that use unconventional vehicle fuels as a power source (or use conventional vehicle fuels and adopt new on-board power devices), and integrate advanced technologies in vehicle power control and drive, resulting in vehicles with advanced technical principles, new technologies, and new structures.

[0003] With the continuous development of new energy vehicles, the requirements for automotive systems are becoming increasingly stringent. The era of mechanically defined and hardware-defined vehicles is coming to an end, and the era of system-defined vehicles is emerging. However, with the trends of vehicle electrification, intelligentization, and connectivity, automotive systems are becoming increasingly complex along with the increasing demands.

[0004] The high-voltage power-on / off function of new energy vehicles is one of the most critical functions of the domain control system. Since the power-on / off system involves a relatively complex process and the interaction of multiple controllers, it undoubtedly brings huge challenges to the design of the power-on / off system.

[0005] Therefore, we have made improvements to this by proposing a high-voltage power supply and discharge system, equipment, and method. Summary of the Invention

[0006] The purpose of this invention is to address the problems of high complexity, poor scalability, and high development cost of current high-voltage power supply and de-energization systems for new energy vehicles.

[0007] To achieve the above-mentioned objectives, the present invention provides a high-voltage power supply and discharge system, equipment, and method to improve the aforementioned problems.

[0008] The application is as follows:

[0009] A high-voltage power-on / off system includes five states: wake-up controller, closed relay, high-voltage establishment, high-voltage equipment shutdown, and power-off sleep; the high-voltage establishment state includes two sub-states: drive standby and driveable.

[0010] When the controller is in a power-down sleep state, it will enter the wake-up controller state if condition 1 is met.

[0011] When the controller is in the wake-up state, it will return to the power-down sleep state if condition 2 is met; it can enter the closed relay state if condition 3 is met.

[0012] When the controller is in the closed relay state, it can return to the power-down sleep state if condition 4 is met; it can enter the high voltage establishment state if condition 5 is met.

[0013] When the controller is in the high-voltage setup state, it can enter the high-voltage equipment shutdown state if condition 8 is met.

[0014] When the controller is in the high voltage establishment state, it first enters the drive standby state by default; after condition 6 is met, it enters the driveable state; after entering the driveable state, it returns to the drive standby state after condition 7 is met.

[0015] When the controller is in the state of shutting down high-voltage equipment, it can enter the power-down sleep state if condition 9 is met.

[0016] As a preferred technical solution of this application, condition 1 includes both hard-wired wake-up sources and network wake-up sources;

[0017] Condition 2 indicates that there are no hardwired wake-up sources or network wake-up sources, and condition 3 indicates that the high voltage self-test has passed;

[0018] Condition 4 indicates that the relay failed to engage, and condition 5 indicates that the relay engaged successfully.

[0019] Condition 6 indicates that the driving conditions have been met, and condition 7 indicates that the driver needs to be exited.

[0020] Condition 8 indicates a power-down requirement (serious fault, loss of wake-up source, etc.);

[0021] Condition 9 indicates that the high-voltage equipment has been successfully shut down.

[0022] A high-voltage power supply and switching device includes a fault diagnosis module and a high-voltage power supply and switching module;

[0023] The high-voltage power-on / off module and the fault diagnosis module use the same fault monitoring conditions;

[0024] The high-voltage power-on / off module and the fault diagnosis module use the same fault time threshold and the same calibration value. The high-voltage power-on / off module adds an additional fault time threshold to the same fault time threshold, which is used as the final fault time threshold of the high-voltage power-on / off module.

[0025] The high-voltage power-on / off module introduces a fault confirmation flag bit from the fault diagnosis module; after receiving the fault confirmation flag bit from the fault diagnosis module, or after the high-voltage power-on / off module itself diagnoses the fault, it executes the relevant power-on / off fault actions.

[0026] As a preferred technical solution of this application, the fault diagnosis module monitors the status of the electrical system based on the operation records of the high voltage power-on / off module, and identifies the fault type based on the preset fault mode.

[0027] As a preferred technical solution of this application, the fault confirmation flag of the fault diagnosis module can be set by a remote monitoring system or a user interface to achieve remote fault confirmation and control.

[0028] As a preferred technical solution of this application, the high-voltage power-on / off module can record and store historical fault information of the electrical system for fault trend analysis and maintenance plan formulation.

[0029] A method for handling high-voltage power supply and disconnection faults, using high-voltage power supply and disconnection equipment, including:

[0030] The fault diagnosis module determines whether the fault detection conditions are met. If not, it continues to make judgments. If yes, it determines whether the fault confirmation time is greater than or equal to the fault time threshold. If not, it ends. If yes, it reports the fault code and sets the fault confirmation flag.

[0031] After the high-voltage power-on / off module receives the fault confirmation flag from the fault diagnosis module, it determines whether the fault detection conditions are met. If not, it continues to determine whether the conditions are met. If the conditions are met, it sets the fault confirmation flag. If the fault is confirmed, it executes the relevant high-voltage fault prohibition action and then ends. If the fault is not confirmed, it determines whether the fault confirmation time is greater than or equal to the sum of the fault time threshold and the additional fault time threshold. If the fault is confirmed, it executes the relevant high-voltage fault prohibition action and then ends.

[0032] As a preferred technical solution of this application, the fault diagnosis module samples the operating parameters of the electrical system and performs statistical analysis after determining that the fault detection conditions are met, so as to enhance the reliability of fault diagnosis.

[0033] As a preferred technical solution of this application, the high-voltage power-on / off module transmits the fault handling results to the operator through sound, light signals or communication interfaces to ensure that the operator is aware of the system status in a timely manner.

[0034] As a preferred technical solution of this application, after the high-voltage power-on / off module performs the high-voltage fault prohibition action, it automatically resets the fault confirmation flag bit to proceed with the next round of fault handling.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] In the scheme of this application:

[0037] 1. In order to solve the problem that the power-on and power-off processes in the existing technology are relatively complex and involve the interaction of multiple controllers, which undoubtedly brings great challenges to the design of the power-on and power-off system, this invention includes five states: wake-up controller, relay closure, high voltage establishment, high voltage equipment shutdown, and power-off sleep. By satisfying specific conditions, the system can switch between these states, which can solve the problems of high complexity, poor scalability, and high system development cost of the high voltage power-on and power-off functional circle of the domain control system of new energy vehicles.

[0038] 2. To address the issue that in existing technologies, high-voltage power-on / off and fault diagnosis are typically separate functional modules, and that high-voltage power-on involves a complex power-on / off process, unreasonable design can lead to high system complexity, large calibration and testing workload, failure to report faults, and the inability to guarantee the most basic power-on / off functions. This application achieves more accurate and reliable fault diagnosis and handling by setting unified fault monitoring conditions, fault time thresholds, and calibration values, and by introducing the concepts of fault confirmation flags and additional fault time thresholds. Attached Figure Description

[0039] Figure 1 is a schematic diagram of the high-voltage power supply system provided in this application;

[0040] Figure 2 is a flowchart of the fault diagnosis module provided in this application;

[0041] Figure 3 is a flowchart of the fault handling process for the high-voltage power-on / off module provided in this application;

[0042] Figure 4 is a schematic diagram of the fault interaction between the fault diagnosis module and the high voltage power-on / off module provided in this application. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0044] Example 1

[0045] Please refer to Figure 1. A high-voltage power-on / off system includes five states: wake-up controller, relay closure, high-voltage establishment, high-voltage equipment shutdown, and power-off sleep. The system transitions between states according to conditions, namely S101, S102, S103, S104, and S105 in Figure 1. This system provides a flexible high-voltage management method, enabling smooth switching between different states to meet different operational and fault handling requirements.

[0046] Among them, "wake-up controller" mainly refers to the state the controller enters after being woken up by a hard-wired wake-up source (KL15, OBC, BMS, etc.) or a network wake-up source; "closing relay" mainly refers to the engagement of the main positive, main negative, and pre-charge relays; "high voltage establishment" mainly indicates that the main positive, main negative, and pre-charge relays have been successfully engaged, and the high voltage has been successfully established; "shutting down high voltage equipment" mainly refers to shutting down high voltage equipment such as BMS, DC-DC, air conditioner, and motor during the power-down process; and "power-down hibernation" mainly refers to the controller waiting to hibernate after the high voltage equipment has been successfully shut down during the power-down process.

[0047] The high-voltage establishment state includes two sub-states: drive standby and driveable. Drive standby indicates that the high voltage has been established and high-voltage components such as air conditioner, PTC, DC-DC, and heat pump can be turned on, but the vehicle cannot be driven. Driveable indicates that the vehicle can be driven, which is equivalent to the Ready state on the instrument panel.

[0048] When the controller is in a power-down sleep state, it can enter the wake-up state if condition 1 is met; condition 1 includes hard-wired wake-up sources (KL15, OBC, BMS, etc.) and network wake-up sources;

[0049] When the controller is in the wake-up controller state, it can return to the power-down sleep state if condition 2 is met; it can enter the closed relay state if condition 3 is met; condition 2 mainly indicates that there are no hard-wired wake-up sources (KL15, OBC, BMS, etc.) or network wake-up sources, and condition 3 indicates that the high-voltage self-test has passed.

[0050] When the controller is in the closed relay state, it can return to the power-down sleep state if condition 4 is met; it can enter the high voltage establishment state if condition 5 is met; condition 4 indicates that the relay (main positive, main negative and pre-charge relays, etc.) failed to engage, and condition 5 indicates that the relay (main positive, main negative and pre-charge relays, etc.) engaged successfully.

[0051] When the controller is in the high voltage establishment state, it can enter the high voltage equipment shutdown state if condition 8 is met; condition 8 indicates that there is a power-down requirement (serious fault, disappearance of wake-up source, etc.).

[0052] When the controller is in the high voltage establishment state, it will first enter the drive standby state by default; after condition 6 is met, it will enter the driveable state; after entering the driveable state, it will return to the drive standby state after condition 7 is met; condition 6 indicates that the drive conditions have been met (brake is pressed, anti-theft has been passed, no charging needs, etc.), and condition 7 indicates that the drive needs to be exited (there is a charging need, a fault has occurred, etc.).

[0053] When the controller is in the state of shutting down high-voltage equipment, it can enter the power-down sleep state if condition 9 is met. Condition 9 indicates that high-voltage equipment such as BMS, DC-DC, air conditioner, and motor have been successfully shut down.

[0054] Example 2

[0055] A high-voltage power supply and switching device includes a fault diagnosis module and a high-voltage power supply and switching module;

[0056] The high-voltage power-on / off module and the fault diagnosis module use the same fault monitoring conditions to ensure that the fault detection conditions of the two modules are completely consistent, that is, the fault monitoring conditions of S101 in Figure 2 and S201 in Figure 3 are completely consistent.

[0057] The high-voltage power-on / off module and the fault diagnosis module use the same fault time threshold and the same calibration value. Using the same calibration value for the two modules not only reduces the total number of calibration values ​​in the domain control system, but also reduces the workload and error probability of calibration testing. That is, the fault time thresholds of S102 in Figure 2 and S203 in Figure 3 are completely consistent and use the same calibration value.

[0058] In addition to the same fault time threshold as the fault diagnosis module, the high-voltage power-on / off module adds an additional fault time threshold, as shown in S203 in Figure 3, as the final fault time threshold of the high-voltage power-on / off module. This ensures that the fault diagnosis module reports the fault before the high-voltage power-on / off module, thus ensuring that the fault code can be reported normally.

[0059] The high-voltage power-on / off module introduces a fault confirmation flag bit into the fault diagnosis module, as shown in S301 in Figure 4.

[0060] When the high-voltage power-on / off module receives the fault confirmation flag from the fault diagnosis module, or when the high-voltage power-on / off module itself diagnoses the fault, it executes the relevant power-on / off fault actions (as shown in S202, S203 and S204 in Figure 3). This avoids the redundancy design of the high-voltage power-on / off module in diagnosing itself even if the fault diagnosis module fails to report the fault due to some unforeseen reasons, which greatly ensures the life of vehicle components and the safety of passengers.

[0061] Furthermore, the fault diagnosis module monitors the status of the electrical system based on the operation records of the high-voltage power-on / off module, and identifies fault types based on preset fault modes. The fault diagnosis module can promptly identify fault types in the electrical system and provide faster fault analysis and processing.

[0062] Furthermore, the fault confirmation flag of the fault diagnosis module can be set by the remote monitoring system or the user interface to realize remote fault confirmation and control. By remotely setting the fault confirmation flag, operators can more conveniently perform fault diagnosis and control, thereby improving the maintenance efficiency of the system.

[0063] Furthermore, the high-voltage power-on / off module can record and store historical fault information of the electrical system for fault trend analysis and maintenance plan formulation. By recording and analyzing historical fault information, the system can predict potential fault trends, which helps to formulate reasonable maintenance plans and reduce the impact of system faults on operation.

[0064] Example 3

[0065] A method for handling high-voltage power supply and disconnection faults, using high-voltage power supply and disconnection equipment, including:

[0066] The fault diagnosis module determines whether the fault detection conditions are met. If not, it continues to make judgments. If yes, it determines whether the fault confirmation time is greater than or equal to the fault time threshold. If not, it ends. If yes, it reports the fault code and sets the fault confirmation flag.

[0067] After the high-voltage power-on / off module receives the fault confirmation flag from the fault diagnosis module, it determines whether the fault detection conditions are met. If not, it continues to determine whether the conditions are met. If the conditions are met, it sets the fault confirmation flag. If the fault is confirmed, it executes the relevant high-voltage fault prohibition action and then ends. If the fault is not confirmed, it determines whether the fault confirmation time is greater than or equal to the sum of the fault time threshold and the additional fault time threshold. If the fault is confirmed, it executes the relevant high-voltage fault prohibition action and then ends.

[0068] Furthermore, after determining that the fault detection conditions are met, the fault diagnosis module samples the operating parameters of the electrical system and performs statistical analysis to enhance the reliability of fault diagnosis. By sampling and analyzing the operating parameters, the system can more accurately determine the fault type and location, thereby improving the accuracy of fault handling.

[0069] Furthermore, the high-voltage power-on / off module transmits fault handling results to operators via sound, light signals, or communication interfaces to ensure that operators are aware of the system status in a timely manner. By transmitting fault handling results through multiple methods, operators can understand the system status promptly and take appropriate countermeasures.

[0070] Furthermore, after executing the high-voltage fault prohibition action, the high-voltage power-on / off module automatically resets the fault confirmation flag to proceed with the next round of fault handling. Automatically resetting the fault confirmation flag ensures that the next round of fault handling is not affected by the previous handling, thus maintaining the stability of the system.

[0071] In this invention, unless otherwise explicitly specified and limited, the terms installation, connection, linking, fixing, etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0072] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A high-voltage power supply and discharge system, characterized in that, include: The system has five states: controller wake-up, relay closure, high-voltage establishment, high-voltage equipment shutdown, and power-down sleep. The high-voltage establishment state includes two sub-states: drive standby and driveable. When the controller is in the power-down sleep state, it enters the controller wake-up state if condition 1 is met. When the controller is in the controller wake-up state, it returns to the power-down sleep state if condition 2 is met. If condition 3 is met, it enters the relay closure state. When the controller is in the relay closure state, it returns to the power-down sleep state if condition 4 is met. If condition 5 is met, it enters the high-voltage establishment state. When the controller is in the high-voltage setup state, it will enter the high-voltage equipment shutdown state if condition 8 is met. When the controller is in the high voltage establishment state, it first enters the drive standby state by default; after condition 6 is met, it enters the driveable state; after entering the driveable state, it returns to the drive standby state after condition 7 is met. When the controller is in the state of shutting down the high-voltage equipment, it enters the power-down sleep state when condition 9 is met; condition 1 includes hard-wired wake-up source and network wake-up source; condition 2 indicates that there is no hard-wired wake-up source or network wake-up source; condition 3 indicates that the high-voltage self-test is passed; condition 4 indicates that the relay failed to engage; condition 5 indicates that the relay engaged successfully; condition 6 indicates that the drive conditions have been met; condition 7 indicates that the drive needs to be exited; condition 8 indicates that there is a power-down requirement; condition 9 indicates that the high-voltage equipment has been successfully shut down.

2. A high-voltage power supply device, using the high-voltage power supply system as described in claim 1, characterized in that, It includes a fault diagnosis module and a high-voltage power-on / off module; the high-voltage power-on / off module and the fault diagnosis module use the same fault monitoring conditions; the high-voltage power-on / off module and the fault diagnosis module use the same fault time threshold and the same calibrated quantity; the high-voltage power-on / off module adds an additional fault time threshold to the same fault time threshold as the final fault time threshold of the high-voltage power-on / off module; the high-voltage power-on / off module introduces a fault confirmation flag bit from the fault diagnosis module; the high-voltage power-on / off module executes the relevant power-on / off fault actions after receiving the fault confirmation flag bit from the fault diagnosis module or after the high-voltage power-on / off module itself diagnoses the fault.

3. A high-voltage power supply and distribution device according to claim 2, characterized in that, The fault diagnosis module monitors the status of the electrical system based on the operation records of the high-voltage power-on / off module, and identifies the fault type based on the preset fault mode.

4. A high-voltage power supply and distribution device according to claim 3, characterized in that, The fault confirmation flag of the fault diagnosis module is set by the remote monitoring system or user interface to achieve remote fault confirmation and control.

5. A high-voltage power supply and distribution device according to claim 4, characterized in that, High-voltage power-on / off modules can record and store historical fault information of electrical systems for fault trend analysis and maintenance plan development.

6. A method for handling high-voltage power-on / off faults, using the high-voltage power-on / off equipment as described in claim 5, characterized in that, include: The fault diagnosis module determines whether the fault detection conditions are met. If not, it continues to determine whether the fault confirmation time is greater than or equal to the fault time threshold. If not, it terminates. If the fault is confirmed, it reports a fault code and sets the fault confirmation flag. After receiving the fault confirmation flag from the fault diagnosis module, the high-voltage power-on / off module determines whether the fault detection conditions are met. If not, it continues to determine whether the fault confirmation conditions are met. If the fault is confirmed, it sets the fault confirmation flag. If confirmed, it executes the relevant high-voltage fault prohibition action and terminates. If not confirmed, it determines whether the fault confirmation time is greater than or equal to the sum of the fault time threshold and the additional fault time threshold. If confirmed, it executes the relevant high-voltage fault prohibition action and terminates.

7. A method for handling high-voltage power-on / off faults according to claim 6, characterized in that, After determining that the fault detection conditions are met, the fault diagnosis module samples the operating parameters of the electrical system and performs statistical analysis.

8. A method for handling high-voltage power-on / off faults according to claim 6, characterized in that, The high-voltage power-on / off module transmits fault handling results to the operator through sound, light signals, or communication interfaces.

9. A method for handling high-voltage power-on / off faults according to claim 6, characterized in that, After executing the high-voltage fault prohibition action, the high-voltage power-on / off module automatically resets the fault confirmation flag to proceed with the next round of fault handling.

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