Power battery high-voltage monitoring system, method, device, terminal and medium

Abstract

The application discloses a kind of power battery high pressure monitoring systems, methods, devices, terminal and medium, wherein, monitoring system includes battery high pressure acquisition module, fault identification module and safety module;Battery high pressure acquisition module obtains initial high pressure data;Fault identification module respectively obtains the electronic device state information and high pressure data of sampling module circuit and carries out logic judgment to electronic device state information and high pressure data and obtains corresponding fault level command and sends to safety module;Safety module enters corresponding safety state according to command execution;The present application avoids the common cause failure of high pressure acquisition through two acquisition channels, improves the accuracy and reliability of high pressure monitoring by monitoring the high voltage of power battery, and judges the detection results of electrical faults and voltage range, enters different safety states through the safety module, effectively reduces the probability of safety accidents triggered by inaccurate high pressure acquisition or abnormal high pressure output state.

Description

Technical Field

[0001] This invention relates to the field of vehicle power battery technology, and in particular to a power battery high voltage monitoring system, method, device, terminal and medium. Background Technology

[0002] In the field of battery management systems for new energy vehicles, the detection of high voltage in power batteries is a necessary and essential functional requirement. This facilitates the identification of the high voltage state of the power battery and ensures the reliability of the effective voltage output. Generally, the voltage of power batteries is very high (greater than or equal to 100V). For safe testing, the high-voltage sampling circuit is designed as an isolated sampling circuit to ensure the safe application of the low-voltage side sampling circuit.

[0003] Currently, the high-voltage sampling solutions used in the industry all employ only one sampling method, which cannot meet the requirements of functional safety design and cannot guarantee the reliable application of the high-voltage acquisition circuit of the power battery. Once the sampling circuit fails, it will have unpredictable impacts on safety, posing a significant threat to personal safety. Many companies add certain safety measures to ensure the reliability of the circuit, but safety assessments still carry a certain degree of risk. Some companies use the same sampling principle circuit for redundant sampling, which reduces the probability of failure to some extent, but cannot avoid sampling circuit failures caused by the same reasons, which is the common cause failure mentioned in functional safety.

[0004] In summary, current technologies for monitoring high voltage in power batteries suffer from low reliability. Summary of the Invention

[0005] The purpose of this invention is to provide a high-voltage monitoring system, method, device, terminal, and medium for power batteries to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-voltage monitoring system for a power battery, the system comprising: a high-voltage battery acquisition module, a fault identification module, and a safety module;

[0007] The battery high voltage acquisition module includes: a first battery high voltage acquisition circuit and a second battery high voltage acquisition circuit, wherein the first battery high voltage acquisition circuit and the second battery high voltage acquisition circuit apply different acquisition principles.

[0008] The first battery high-voltage acquisition circuit is used to acquire initial high-voltage data, process it to obtain first high-voltage data, and send it to the fault identification module.

[0009] The second battery high-voltage acquisition circuit is used to acquire initial high-voltage data, process it to obtain second high-voltage data, and send it to the fault identification module.

[0010] The fault identification module is used to acquire the electronic device status information, the first high voltage data and the second high voltage data of the sampling module circuit, respectively, and to perform logical judgment on the electronic device status information, the first high voltage data and the second high voltage data of the sampling module circuit to obtain the corresponding fault level command and send it to the safety module.

[0011] The security module is used to obtain the fault level command and execute it to enter the corresponding security state.

[0012] Furthermore, the first battery high-voltage acquisition circuit includes a sampling circuit electrically connected to the high voltage of the power battery, the sampling circuit being electrically connected to an isolation communication circuit, the isolation communication circuit being electrically connected to a first high-voltage acquisition unit, and the first high-voltage acquisition unit being electrically connected to a fault identification module;

[0013] The second battery high-voltage acquisition circuit includes an isolation sampling circuit electrically connected to the high voltage of the power battery. The isolation sampling circuit is electrically connected to the second high-voltage acquisition unit, and the second high-voltage acquisition unit is electrically connected to the fault identification module.

[0014] Furthermore, the sampling circuit is used to perform resistive voltage division and analog-to-digital processing on the input high voltage of the power battery to obtain the first high voltage data and send it to the isolated communication circuit;

[0015] The isolation communication circuit is used to perform signal isolation, protection, and filtering processing on the first high-voltage data to obtain the first high-voltage data and send it to the first high-voltage acquisition unit.

[0016] The first high-voltage acquisition unit is used to send the first high-voltage data to the fault identification module;

[0017] The isolation sampling circuit is used to perform signal isolation and protection processing on the input high voltage of the power battery and to isolate and divide the voltage to obtain the second high voltage data, which is then sent to the second high voltage acquisition unit.

[0018] The second high-voltage acquisition unit is used to perform digital-analog processing on the second high-voltage data to obtain the second high-voltage data and send it to the fault identification module.

[0019] On the other hand, a method for monitoring high voltage in a power battery includes the following steps:

[0020] S1: Obtain the electronic component status information of the sampling module circuit, including the first high-voltage data and the second high-voltage data;

[0021] S2: Judge and identify the status information of electronic devices and the first high voltage data and the second high voltage data to obtain the corresponding fault level command;

[0022] S3: Based on the fault level, the safety module enters the corresponding safety state;

[0023] Furthermore, the fault conditions of the electronic components in the sampling module circuit include at least the following: open circuit, short circuit, parameter drift, and functional failure.

[0024] Furthermore, the step of judging and identifying the electronic device status of the sampling circuit, the first high-voltage data, and the second high-voltage data to obtain the corresponding fault level command includes:

[0025] The electronic components of the sampling circuit are assessed to determine if there is a circuit fault.

[0026] Yes, determine whether it is a fault that causes the function to fail;

[0027] Yes, reassess whether it is a fault that could compromise safety;

[0028] Yes, the fault level command is the third fault level command;

[0029] No, the fault level command is the second fault level command;

[0030] No, the fault level command is the first fault level command;

[0031] For the first high-voltage data and the second high-voltage data, respectively, the minimum value is taken, and it is determined whether the minimum value is less than the first threshold:

[0032] Yes, check again whether the minimum value is less than the second threshold;

[0033] Yes, the fault level command is the third fault level command;

[0034] No, the fault level command is the second fault level command;

[0035] No, the fault level command is the first fault level command;

[0036] Proceed to the next step;

[0037] For the first high-voltage data and the second high-voltage data, respectively, the maximum value is taken, and it is determined whether the maximum value is greater than the third threshold:

[0038] Yes, check again whether the maximum value is greater than the fourth threshold;

[0039] Yes, the fault level command is the third fault level command;

[0040] No, the fault level command is the second fault level command;

[0041] No, the fault level command is the first fault level command;

[0042] Proceed to the next step;

[0043] The difference between the first high-voltage data and the second high-voltage data is obtained based on the first high-voltage data and the second high-voltage data.

[0044] Determine whether the difference between the first high-voltage data and the second high-voltage data is greater than the fifth threshold:

[0045] Yes, determine again whether the difference is greater than the sixth threshold? Yes, the fault level command is the third fault level command; no, the fault level command is the second fault level command.

[0046] No, the fault level command is the first fault level command.

[0047] Furthermore, based on the fault level command, the safety module enters the corresponding safety state, including:

[0048] When the fault level command is the first fault level command, the safety mode executed by the safety module is the normal working mode;

[0049] When the fault level command is the second fault level command, the safety module executes the safety mode of limited TBD% power operation after TBD time, and at the same time issues a warning signal to the driver.

[0050] When the fault level command is the third fault level command, the safety module executes a safety mode in which all high-voltage contactors are disconnected after the TBD time, and a warning signal is issued to the driver.

[0051] On another front, a high-voltage monitoring device for power batteries includes:

[0052] The data acquisition module is used to acquire the electronic device status information of the sampling module circuit, the first high voltage data, and the second high voltage data respectively.

[0053] The judgment and identification module is used to judge and identify the status information of the electronic device, the first high voltage data and the second high voltage data respectively to obtain the corresponding fault level command.

[0054] On the other hand, a terminal includes:

[0055] One or more processors;

[0056] Memory for storing the one or more processor-executable instructions;

[0057] Wherein, the one or more processors are configured as follows:

[0058] Perform any of the above-described high-voltage monitoring methods for power batteries.

[0059] On another front, a non-transitory computer-readable storage medium is provided, which, when the instructions in the storage medium are executed by the processor of a terminal, enables the terminal to execute any of the above-described high-voltage monitoring methods for power batteries.

[0060] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, the high voltage acquisition of the power battery is achieved through two acquisition channels with different sampling principles, which avoids common cause failures in high voltage acquisition. By adopting functional safety-related methods for high voltage monitoring of the power battery, the accuracy and reliability of high voltage monitoring of the power battery are improved. At the same time, by detecting and judging electrical faults in the acquisition circuit and the range of the acquired voltage, the safety module enters different safety states, which can effectively reduce the probability of safety accidents triggered by inaccurate high voltage acquisition of the power battery or abnormal high voltage output state of the power battery. Attached Figure Description

[0061] Figure 1 This is a structural block diagram of a high-voltage monitoring system for a power battery according to an embodiment of the present invention;

[0062] Figure 2 This is a schematic diagram of a high-voltage acquisition structure for a power battery according to an embodiment of the present invention;

[0063] Figure 3 This is a flowchart of a high-voltage monitoring method for a power battery according to an embodiment of the present invention;

[0064] Figure 4 This is a structural block diagram of a high-voltage monitoring device for a power battery according to an embodiment of the present invention. Detailed Implementation

[0065] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0066] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0067] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0068] Please refer to the accompanying drawings in the specification. This invention provides a technical solution: such as... Figure 1 As shown, a high-voltage monitoring system for a power battery includes: a high-voltage battery acquisition module, a fault identification module, and a safety module.

[0069] like Figure 2 As shown, the battery high voltage acquisition module includes: a first battery high voltage acquisition circuit and a second battery high voltage acquisition circuit, wherein the first battery high voltage acquisition circuit and the second battery high voltage acquisition circuit apply different acquisition principles.

[0070] Specifically, the high-voltage acquisition of the two branches uses different acquisition principles to avoid failures caused by common factors and improve the reliability and safety of high-voltage acquisition of the power battery.

[0071] The first battery high-voltage acquisition circuit is used to acquire initial high-voltage data, process it to obtain first high-voltage data, and send it to the fault identification module.

[0072] Specifically, the first battery high-voltage acquisition circuit includes a sampling circuit electrically connected to the high voltage of the power battery, an isolation communication circuit electrically connected to an isolation communication circuit, an isolation communication circuit electrically connected to a first high-voltage acquisition unit, and a first high-voltage acquisition unit electrically connected to a fault identification module. The sampling circuit includes current-limiting resistors; the number of current-limiting resistors is not limited, but their parameters meet design requirements. These resistors are used to perform voltage division processing on the high voltage of the power battery. The specific mode of the sampling circuit is not limited. The sampling circuit is used to acquire the input high-voltage data from the power battery to obtain first high-voltage data, which is then sent to the isolation communication circuit. The isolation communication circuit is used to perform signal isolation, protection, filtering, and analog-to-digital conversion on the first high-voltage data to obtain the first high-voltage data, which is then sent to the first high-voltage acquisition unit. The first high-voltage acquisition unit does not need to include an AD acquisition module; it is used to perform software filtering on the acquired first high-voltage data and send it to the fault identification module.

[0073] The second battery high-voltage acquisition circuit is used to acquire initial high-voltage data, process it to obtain second high-voltage data, and send it to the fault identification module.

[0074] Specifically, the second battery high-voltage acquisition circuit includes an isolation sampling circuit electrically connected to the high-voltage power battery. This isolation sampling circuit is electrically connected to the second high-voltage acquisition unit, which in turn is electrically connected to the fault identification module. The isolation sampling circuit includes an isolation transformer that sets the turns ratio of the primary and secondary coils according to the high-voltage state of the power battery. This transformer is used to acquire second high-voltage divider data and send it to the second high-voltage acquisition unit. The second high-voltage acquisition unit includes at least an AD acquisition module, used to acquire the second high-voltage data, perform software filtering, and then send it to the fault identification module.

[0075] The fault identification module is used to acquire the electronic device status information, the first high voltage data and the second high voltage data of the sampling module circuit, respectively, and to perform logical judgment on the electronic device status information, the first high voltage data and the second high voltage data of the sampling module circuit to obtain the corresponding fault level command and send it to the safety module.

[0076] The security module is used to obtain the fault level command and execute it to enter the corresponding security state.

[0077] Specifically, when the fault level command is the first fault level command, the safety module executes the entry into the normal operating mode, indicating that the battery management system is in normal operating condition; when the fault level command is the second fault level command, the safety module executes the entry into the TBD (To Be Determined) safety state for a specified time, then limits the TBD% power operation and simultaneously issues a warning signal to the driver; when the fault level command is the third fault level command, the safety module executes the entry into the TBD safety state for a specified time, then disconnects all high-voltage contactors and simultaneously issues a warning signal to the driver to avoid personal injury caused by faults involving functional safety.

[0078] Optionally, the first battery high-voltage acquisition circuit includes a sampling circuit electrically connected to the high voltage of the power battery, the sampling circuit being electrically connected to an isolation communication circuit, the isolation communication circuit being electrically connected to a first high-voltage acquisition unit, and the first high-voltage acquisition unit being electrically connected to a fault identification module.

[0079] The second battery high-voltage acquisition circuit includes an isolation sampling circuit electrically connected to the high voltage of the power battery. The isolation sampling circuit is electrically connected to the second high-voltage acquisition unit, and the second high-voltage acquisition unit is electrically connected to the fault identification module.

[0080] Optionally, the sampling circuit is used to perform resistive voltage division and analog-to-digital processing on the input high voltage of the power battery to obtain the first high voltage data and send it to the isolation communication circuit;

[0081] The isolation communication circuit is used to perform signal isolation, protection, and filtering processing on the first high-voltage data to obtain the first high-voltage data and send it to the first high-voltage acquisition unit.

[0082] The first high-voltage acquisition unit is used to send the first high-voltage data to the fault identification module;

[0083] The isolation sampling circuit is used to perform signal isolation and protection processing on the input high voltage of the power battery and to isolate and divide the voltage to obtain the second high voltage data, which is then sent to the second high voltage acquisition unit.

[0084] The second high-voltage acquisition unit is used to perform digital-analog processing on the second high-voltage data to obtain the second high-voltage data and send it to the fault identification module.

[0085] On the other hand, such as Figure 3 As shown, a method for monitoring high voltage in a power battery is provided, including the following steps:

[0086] S102. Obtain the electronic device status information of the sampling module circuit, the first high voltage data and the second high voltage data;

[0087] S104. Judge and identify the status information of electronic devices, the first high voltage data, and the second high voltage data to obtain the corresponding fault level command.

[0088] S106. Based on the fault level, the safety module enters the corresponding safety state.

[0089] In the above embodiments, the high-voltage acquisition of the power battery in this invention uses two acquisition channels with different sampling principles to avoid common-cause failures in high-voltage acquisition. By employing functional safety-related methods for high-voltage monitoring of the power battery, the accuracy and reliability of high-voltage monitoring are improved. At the same time, by detecting and judging electrical faults in the acquisition circuit and the range of the acquired voltage, different safety states are entered through the safety module, which can effectively reduce the probability of safety accidents triggered by inaccurate high-voltage acquisition or abnormal high-voltage output state of the power battery, thus ensuring personal safety.

[0090] Optionally, the fault conditions of the electronic device state of the sampling module circuit include at least the following: open circuit, short circuit, parameter drift and functional failure.

[0091] Optionally, the step of judging and identifying the electronic device status, the first high-voltage data, and the second high-voltage data of the sampling circuit to obtain the corresponding fault level command includes:

[0092] The electronic components of the sampling circuit are assessed to determine if there is a circuit fault.

[0093] Yes, determine whether it is a fault that causes the function to fail;

[0094] Yes, reassess whether it is a fault that could compromise safety;

[0095] Yes, the fault level command is the third fault level command;

[0096] No, the fault level command is the second fault level command;

[0097] No, the fault level command is the first fault level command;

[0098] For the first high-voltage data and the second high-voltage data, respectively, the minimum value is taken, and it is determined whether the minimum value is less than the first threshold:

[0099] Yes, check again whether the minimum value is less than the second threshold;

[0100] Yes, the fault level command is the third fault level command;

[0101] No, the fault level command is the second fault level command;

[0102] No, the fault level command is the first fault level command;

[0103] Proceed to the next step;

[0104] For the first high-voltage data and the second high-voltage data, respectively, the maximum value is taken, and it is determined whether the maximum value is greater than the third threshold:

[0105] Yes, check again whether the maximum value is greater than the fourth threshold;

[0106] Yes, the fault level command is the third fault level command;

[0107] No, the fault level command is the second fault level command;

[0108] No, the fault level command is the first fault level command;

[0109] Proceed to the next step;

[0110] The difference between the first high-voltage data and the second high-voltage data is obtained based on the first high-voltage data and the second high-voltage data.

[0111] Determine whether the difference between the first high-voltage data and the second high-voltage data is greater than the fifth threshold:

[0112] Yes, check again whether the difference is greater than the sixth threshold;

[0113] Yes, the fault level command is the third fault level command;

[0114] No, the fault level command is the second fault level command;

[0115] No, the fault level command is the first fault level command.

[0116] Optionally, based on the fault level command, the safety module enters the corresponding safety state, including:

[0117] When the fault level command is the first fault level command, the safety mode executed by the safety module is the normal working mode;

[0118] When the fault level command is the second fault level command, the safety module executes the safety mode of limited TBD% power operation after TBD time, and at the same time issues a warning signal to the driver.

[0119] When the fault level command is the third fault level command, the safety module executes a safety mode in which all high-voltage contactors are disconnected after the TBD time, and a warning signal is issued to the driver.

[0120] In the above embodiments, the fault conditions of the electronic device state of the sampling module circuit include at least the following: open circuit, short circuit, parameter drift, and functional failure. An open circuit means that the electronic device is in a disconnected state, resulting in the loss of collected information or abnormal circuit function; a short circuit means that the electronic device is in a direct connection state or adjacent pins of the functional chip are in a direct connection state, resulting in incorrect collected information or abnormal circuit function; parameter drift means that the voltage value used for collecting and calculating is inaccurate, resulting in incorrect collected information; and functional failure means that the logic device is malfunctioning, resulting in the inability to sample voltage values.

[0121] On the other hand, such as Figure 4 As shown, a high-voltage monitoring device for a power battery is provided, comprising:

[0122] The data acquisition module is used to acquire the electronic device status information, the first high voltage data, and the second high voltage data of the sampling module circuit, respectively.

[0123] The judgment and identification module is used to judge and identify the status information of the electronic device, the first high voltage data and the second high voltage data respectively, and obtain the corresponding fault level command.

[0124] On the other hand, a terminal is provided, including:

[0125] One or more processors;

[0126] Memory for storing the one or more processor-executable instructions;

[0127] Wherein, the one or more processors are configured as follows:

[0128] Perform any of the above-described high-voltage monitoring methods for power batteries.

[0129] On another front, a non-transitory computer-readable storage medium is provided, which, when the instructions in the storage medium are executed by the processor of a terminal, enables the terminal to execute any of the above-described high-voltage monitoring methods for power batteries.

[0130] In this invention, the high-voltage acquisition of the power battery uses two acquisition channels with different sampling principles to avoid common-cause failures in high-voltage acquisition. By employing functional safety-related methods for high-voltage monitoring of the power battery, the accuracy and reliability of high-voltage monitoring are improved. At the same time, by detecting and judging electrical faults in the acquisition circuit and the range of the acquired voltage, different safety states are entered through the safety module. This can effectively reduce the probability of safety accidents triggered by inaccurate high-voltage acquisition or abnormal high-voltage output state of the power battery, thus ensuring personal safety.

[0131] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-voltage monitoring system for power batteries, characterized in that, The system includes: a battery high-voltage acquisition module, a fault identification module, and a safety module; The battery high voltage acquisition module includes: a first battery high voltage acquisition circuit and a second battery high voltage acquisition circuit, wherein the first battery high voltage acquisition circuit and the second battery high voltage acquisition circuit apply different acquisition principles. The first battery high-voltage acquisition circuit is used to acquire initial high-voltage data, process it to obtain first high-voltage data, and send it to the fault identification module. The second battery high-voltage acquisition circuit is used to acquire initial high-voltage data, process it to obtain second high-voltage data, and send it to the fault identification module. The fault identification module is used to acquire the electronic device status information, the first high voltage data and the second high voltage data of the sampling module circuit, respectively, and to perform logical judgment on the electronic device status information, the first high voltage data and the second high voltage data of the sampling module circuit to obtain the corresponding fault level command and send it to the safety module. The security module is used to obtain the fault level command and execute it to enter the corresponding security state; The first battery high-voltage acquisition circuit includes a sampling circuit electrically connected to the high voltage of the power battery, and the second battery high-voltage acquisition circuit includes an isolation sampling circuit electrically connected to the high voltage of the power battery. The sampling circuit is used to perform resistive voltage division and analog-to-digital processing on the input high voltage of the power battery to obtain the first high voltage data and send it to the isolation communication circuit. The isolation communication circuit is used to perform signal isolation, protection, and filtering processing on the first high-voltage data to obtain the first high-voltage data and send it to the first high-voltage acquisition unit. The first high-voltage acquisition unit is used to send the first high-voltage data to the fault identification module; The isolation sampling circuit is used to perform signal isolation and protection processing on the input high voltage of the power battery and to isolate and divide the voltage to obtain the second high voltage data, which is then sent to the second high voltage acquisition unit. The second high-voltage acquisition unit is used to perform digital-analog processing on the second high-voltage data to obtain the second high-voltage data and send it to the fault identification module.

2. The high-voltage monitoring system for a power battery according to claim 1, characterized in that, The sampling circuit is electrically connected to the isolation communication circuit, the isolation communication circuit is electrically connected to the first high-voltage acquisition unit, and the first high-voltage acquisition unit is electrically connected to the fault identification module. The isolation sampling circuit is electrically connected to the second high-voltage acquisition unit, and the second high-voltage acquisition unit is electrically connected to the fault identification module.

3. A method for monitoring high voltage of a power battery, applied to a high voltage monitoring system for a power battery as described in any one of claims 1 to 2, characterized in that, Includes the following steps: S102. Obtain the electronic device status information of the sampling module circuit, the first high voltage data and the second high voltage data; S104. Judge and identify the status information of electronic devices, the first high voltage data, and the second high voltage data to obtain the corresponding fault level command. S106. Based on the fault level, the safety module enters the corresponding safety state.

4. The high-voltage monitoring method for a power battery according to claim 3, characterized in that, The fault conditions of the electronic components in the sampling module circuit include at least the following: open circuit, short circuit, parameter drift, and functional failure.

5. The high-voltage monitoring method for a power battery according to claim 3, characterized in that, The electronic device status of the sampling circuit, the first high-voltage data, and the second high-voltage data are judged and identified to obtain corresponding fault level commands, including: The electronic components of the sampling circuit are assessed to determine if there is a circuit fault. Yes, determine whether it is a fault that causes the function to fail; Yes, reassess whether it is a fault that could compromise safety; Yes, the fault level command is the third fault level command; No, the fault level command is the second fault level command; No, the fault level command is the first fault level command; For the first high-voltage data and the second high-voltage data, respectively, the minimum value is taken, and it is determined whether the minimum value is less than the first threshold: Yes, check again whether the minimum value is less than the second threshold; Yes, the fault level command is the third fault level command; No, the fault level command is the second fault level command; No, the fault level command is the first fault level command; Proceed to the next step; For the first high-voltage data and the second high-voltage data, respectively, the maximum value is taken, and it is determined whether the maximum value is greater than the third threshold: Yes, check again whether the maximum value is greater than the fourth threshold; Yes, the fault level command is the third fault level command; No, the fault level command is the second fault level command; No, the fault level command is the first fault level command; Proceed to the next step; The difference between the first high-voltage data and the second high-voltage data is obtained based on the first high-voltage data and the second high-voltage data. Determine whether the difference between the first high-voltage data and the second high-voltage data is greater than the fifth threshold: Yes, check again whether the difference is greater than the sixth threshold; Yes, the fault level command is the third fault level command; No, the fault level command is the second fault level command; No, the fault level command is the first fault level command.

6. The high-voltage monitoring method for a power battery according to claim 5, characterized in that, Based on the fault level command, the safety module enters the corresponding safety state, including: When the fault level command is the first fault level command, the safety mode executed by the safety module is the normal working mode; When the fault level command is the second fault level command, the safety module executes the safety mode of limited TBD% power operation after TBD time, and at the same time issues a warning signal to the driver. When the fault level command is the third fault level command, the safety module executes a safety mode in which all high-voltage contactors are disconnected after the TBD time, and a warning signal is issued to the driver.

7. A high-voltage monitoring device for a power battery, applied to a high-voltage monitoring system for a power battery as described in any one of claims 1 to 2, characterized in that, include: The data acquisition module is used to acquire the electronic device status information of the sampling module circuit, the first high voltage data, and the second high voltage data respectively. The judgment and identification module is used to judge and identify the status information of the electronic device, the first high voltage data and the second high voltage data respectively to obtain the corresponding fault level command.

8. A terminal, characterized in that, include: One or more processors; Memory for storing the one or more processor-executable instructions; Wherein, the one or more processors are configured as follows: Perform the high-voltage monitoring method for a power battery as described in any one of claims 3 to 6.

9. A non-transitory computer-readable storage medium, characterized in that, When the instructions in the storage medium are executed by the processor of the terminal, the terminal is able to execute a high-voltage monitoring method for a power battery as described in any one of claims 3 to 6.

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