Fuse monitoring system, method and apparatus, power distribution system and vehicle

Abstract

A fuse monitoring system, method and apparatus, a power distribution system, and a vehicle. The fuse monitoring system (1000) comprises: a current measurement unit (1100) configured to measure the present current flowing through a target fuse (2000); a voltage measurement unit (1200) connected to the target fuse (2000) and configured to measure the present voltage at both ends of the target fuse (2000); and an integrated control unit (1300) connected to the current measurement unit (1100) and the voltage measurement unit (1200) and configured to determine a health state of the target fuse (2000) on the basis of the present current and the present voltage.

Description

Fuse monitoring system, method, device, power distribution system and vehicle

[0001] This application claims priority to the Chinese patent disclosure with application number 202410327441.6 and application name “Fuse monitoring system, method, device, distribution system and vehicle” filed with the Patent Office of China on March 20, 2024, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to, but is not limited to, the field of vehicle technology, and more specifically, to a fuse monitoring system, method, device, power distribution system, and vehicle. Background Art

[0003] With the rapid development of the new energy vehicle industry, its advantages such as low carbon, environmental protection, low noise and high driving efficiency have been applied to more and more families.

[0004] In electric vehicle power distribution systems, fuses are the most important protective components, playing an irreplaceable role in protecting loads and vehicle safety during short-circuit and overload faults. Fuses in electric vehicles require the same protection characteristics as DC fuses in conventional power distribution systems, while also having to withstand the impact and vibration of road traffic. However, there is a lack of monitoring of the health and lifespan of fuses in electric vehicle power distribution systems, requiring only passive replacement after a fuse blows. This is especially true under abnormal operating conditions, where it's impossible to determine the fuse's status. Technical Solutions

[0005] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0006] The present application provides a new fuse monitoring system, method, device, power distribution system and vehicle, which can monitor the status of fuses.

[0007] According to a first aspect of the present application, a fuse monitoring system is provided, comprising:

[0008] a current detection unit configured to detect a current flowing through the target fuse;

[0009] a voltage detection unit, the voltage detection unit being connected to the target fuse and configured to detect a current voltage across the target fuse;

[0010] The integrated control unit is connected to the current detection unit and the voltage detection unit, and is configured to determine the health status of the target fuse according to the current current and the current voltage.

[0011] Optionally, the current detection unit includes:

[0012] A shunt, the shunt is connected to the power supply circuit of the target fuse;

[0013] A first optocoupler isolation conditioning unit, wherein an input end of the first optocoupler isolation conditioning unit is connected to two ends of the shunt, and an output end of the first optocoupler isolation conditioning unit is connected to the integrated control unit.

[0014] Optionally, the fuse monitoring system also includes:

[0015] The temperature detection unit is arranged in a first preset range close to the target fuse and is connected to the integrated control unit.

[0016] Optionally, the fuse monitoring system also includes:

[0017] a communication unit connected to the integrated control unit and adapted to be connected to an electronic control unit of the vehicle;

[0018] The communication unit is configured to acquire health status data of the target fuse sent by the integrated control unit and send the health status data to the electronic control unit.

[0019] Optionally, the voltage detection unit includes a second optocoupler isolation conditioning unit,

[0020] An input end of the second optical coupler isolation conditioning unit is connected to two ends of the target fuse, and an output end of the second optical coupler isolation conditioning unit is connected to the integrated control unit.

[0021] Optionally, the current detection unit includes:

[0022] a Hall current sensor, the Hall current sensor being arranged within a second preset range close to the target fuse;

[0023] A third optocoupler isolation conditioning unit, wherein the input end of the third optocoupler isolation conditioning unit is connected to the Hall current sensor, and the output end of the third optocoupler isolation conditioning unit is connected to the integrated control unit.

[0024] According to a second aspect of the present application, a fuse monitoring method is provided, comprising:

[0025] Detecting a current flowing through a target fuse to be monitored and a current voltage across both ends of the target fuse;

[0026] The health status of the target fuse is determined based on the current and voltage.

[0027] Optionally, the health status of the target fuse is determined based on the current current and the current voltage, specifically including:

[0028] Determining a first resistance value of a target fuse according to a current current and a current voltage;

[0029] A health status of the target fuse is determined according to the first resistance value.

[0030] Optionally, determining the state of the target fuse according to the first resistance value includes:

[0031] Obtaining a second resistance value of the target fuse, where the second resistance value represents a cold resistance value of the target fuse;

[0032] determining a proportionality coefficient between the first resistance value and the second resistance value;

[0033] The health status of the target fuse is determined according to the proportional coefficient.

[0034] Optionally, the method further includes:

[0035] When the proportional coefficient is greater than or equal to the first coefficient threshold, the remaining service life of the target fuse is determined according to the proportional coefficient.

[0036] Optionally, the remaining service life of the target fuse is determined based on a proportionality factor, including:

[0037] Acquire first mapping data reflecting a mapping relationship between a proportional coefficient and a remaining useful life;

[0038] The remaining service life of the target fuse is obtained according to the proportional coefficient between the first resistance value and the second resistance value and the first mapping data.

[0039] Optionally, the method further includes:

[0040] When the current current is greater than or equal to the set current, the Joule integral of the target fuse is determined according to the current current;

[0041] When the Joule integral is greater than or equal to the set value, a step of determining a health state of the target fuse according to the current current and the current voltage is performed.

[0042] Optionally, the method further includes:

[0043] Get the current temperature of the target fuse;

[0044] Determine the temperature coefficient corresponding to the current temperature as the current temperature coefficient;

[0045] The first resistance value is corrected according to the current temperature coefficient.

[0046] Optionally, the method further includes:

[0047] Get the current temperature of the target fuse;

[0048] When the current temperature is greater than or equal to the set temperature, determining the abnormal operation time of the target fuse, where the abnormal operation time is the cumulative continuous time that the temperature of the target fuse is greater than or equal to the set temperature;

[0049] Monitor the health status of the target fuse based on the abnormal working duration.

[0050] According to a third aspect of the present application, a fuse monitoring device is provided, comprising a memory and a processor, wherein the memory is used to store computer instructions, and the processor is used to execute the method of the second aspect of the present disclosure under the control of the computer instructions.

[0051] According to a fourth aspect of the present application, a power distribution system is provided, comprising a fuse, such as the fuse monitoring system according to the first aspect of the present disclosure.

[0052] According to a fifth aspect of the present application, a vehicle is provided, comprising the power distribution system according to the fourth aspect of the present disclosure.

[0053] In an embodiment of the present application, the health status of the target fuse is monitored by using the current voltage across the target fuse and the current current flowing through the target fuse, so that the obtained health status data of the target fuse can be more accurate.

[0054] Other features and advantages of the embodiments of the present application will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the embodiments of the present disclosure.

[0056] FIG1 is a schematic structural diagram of a fuse monitoring system provided in an embodiment of the present application;

[0057] FIG2 is a schematic structural diagram of another fuse monitoring system provided in an embodiment of the present application;

[0058] FIG3 is a schematic structural diagram of another fuse monitoring system provided in an embodiment of the present application;

[0059] FIG4 is a circuit schematic diagram of an isolation amplifier circuit provided in an embodiment of the present application;

[0060] FIG5 is a schematic structural diagram of a power distribution system provided in an embodiment of the present application;

[0061] FIG6 is a flow chart of a fuse monitoring method according to an embodiment of the present application;

[0062] FIG7 is a flow chart of an example of a fuse monitoring method provided in an embodiment of the present application;

[0063] FIG8 is a schematic structural diagram of a fuse monitoring device provided in an embodiment of the present application.

[0064] Implementation Methods of the Application

[0065] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0066] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0067] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0068] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0069] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0070] It is understandable that with the improvement of environmental awareness and the continuous development of the automobile market, new energy vehicles have gradually become the mainstream of the market.

[0071] In electric vehicle power distribution systems, fuses are the most important protective components, playing an irreplaceable role in protecting loads and vehicle safety during short-circuit and overload faults. Fuses in electric vehicles require the same protection characteristics as DC fuses in conventional power distribution systems, while also having to withstand the impact and vibration of road traffic. However, existing electric vehicle power distribution systems lack monitoring of fuse health and lifespan, requiring only passive replacement after a blown fuse. This is especially true under abnormal operating conditions, where fuse status cannot be determined.

[0072] The power distribution systems in electric vehicles are mostly equipped with two-stage or three-stage fuse protection to ensure that during the vehicle's power use, if any load fails and causes the lower-stage fuse to blow, it will not affect the upper-stage power supply and other lower-stage power supplies. When the lower-stage fuse blows, the upper-stage fuse is also subjected to a small-rate current impact, making it impossible to determine whether the upper-stage fuse can perform its protective role normally.

[0073] Since there are many types of electrical equipment in the car, including resistive loads, inductive loads and capacitive loads, current surges occur at the moment the electrical equipment is started. After a large number of times, this will inevitably affect the fusing function of the fuse and may cause premature fusing failure.

[0074] When a vehicle is driven in a high-temperature area for a long time, the ambient temperature inside the cabin is high, which will also affect the overload characteristics of the fuse.

[0075] Based on the above-mentioned defects, the present application provides a fuse monitoring system, method, device, power distribution system and vehicle. Compared with the related technologies, the health status of the target fuse is monitored by the current voltage at both ends of the target fuse and the current current flowing through the target fuse, which can make the health status monitoring results of the target fuse more accurate.

[0076] FIG1 is a schematic diagram of the structure of a fuse monitoring system provided by an embodiment of the present disclosure. As shown in FIG1 , the fuse monitoring system 1000 includes a current detection unit 1100 , a voltage detection unit 1200 , and an integrated control unit 1300 .

[0077] The current detection unit 1100 is configured to detect a current flowing through the target fuse 2000 to be monitored.

[0078] The voltage detection unit 1200 is connected to the target fuse 2000 , and the voltage detection unit 1200 is configured to detect a current voltage across the target fuse 2000 .

[0079] The integrated control unit 1300 is connected to the current detection unit 1100 and the voltage detection unit 1200 . The integrated control unit 1300 is configured to obtain the current current and the current voltage, and monitor the health status of the target fuse 2000 according to the current current and the current voltage.

[0080] In some embodiments, as shown in Figure 2, the current detection unit 1100 may include a shunt 1110 and a first optocoupler isolation conditioning unit 1120, the shunt 1110 is connected to the power supply circuit of the target fuse 2000, the input end of the first optocoupler isolation conditioning unit 1120 is connected to the two ends of the shunt 1110, and the output end of the first optocoupler isolation conditioning unit 1120 is connected to the integrated control unit 1300.

[0081] A shunt is a device used to measure DC current. It works by generating a voltage across a resistor when DC current flows through it. For example, a shunt can be a resistor with a set resistance.

[0082] In other embodiments, as shown in Figure 3, the current detection unit 1100 may include a Hall current sensor 1130 and a third optocoupler isolation conditioning unit 1140, the Hall current sensor 1130 is arranged within a second preset range close to the target fuse 2000, the input end of the third optocoupler isolation conditioning unit 1140 is connected to the Hall current sensor 1130, and the output end of the third optocoupler isolation conditioning unit 1140 is connected to the integrated control unit 1300.

[0083] The second preset range may be pre-set according to the sensing range of the Hall current sensor.

[0084] The Hall effect sensor is manufactured according to the Hall effect principle and uses electromagnetic induction to achieve contactless detection of the current flowing through the target fuse 2000. This Hall effect sensor can be of any type and is not limited by the sampling frequency. It can accurately identify current surges with pulse widths lower than the sampling frequency. To avoid modifying the power supply circuitry of the target fuse 2000, a planar Hall effect sensor can be used. This only needs to be placed on the target fuse 2000, eliminating the need to modify the power supply circuitry, making it easier to implement.

[0085] In this embodiment, the current detection unit 1100 may detect the current and output a second voltage signal indicating the current to the integrated control unit 1300 .

[0086] In the embodiment of the present disclosure, the health status of the target fuse is monitored by the current voltage across the target fuse and the current current flowing through the target fuse, so that the health status monitoring result of the target fuse can be more accurate.

[0087] In some embodiments, the voltage detection unit 1200 may have a first input terminal, a second input terminal, and an output terminal, wherein the first input terminal and the second input terminal are respectively connected to two ends of the target fuse 2000, and the output terminal is connected to the integrated control unit 1300. The voltage detection unit 1200 may detect the current voltage and output a first voltage signal indicating the current voltage to the integrated control unit 1300.

[0088] In one embodiment of the present disclosure, as shown in Figures 2 and 3, the voltage detection unit 1200 includes a second optocoupler isolation conditioning unit 1210, the input end of the second optocoupler isolation conditioning unit 1210 is connected to the two ends of the target fuse 2000, and the output end of the second optocoupler conditioning unit 1210 is connected to the integrated control unit 1300.

[0089] In one embodiment of the present disclosure, any one of the first optocoupler isolation conditioning unit 1120 , the second optocoupler isolation conditioning unit 1210 , and the third optocoupler isolation conditioning unit 1140 is configured to perform isolation and amplification processing on the input voltage signal.

[0090] In some embodiments, as shown in FIG4 , any optocoupler isolation conditioning unit may include a first input terminal 1121 , a second input terminal 1122 , an output terminal 1123 , a first operational amplifier A1 , and a photocoupler U1 .

[0091] When the optocoupler isolation conditioning unit is the first optocoupler isolation conditioning unit 1120, the first input terminal 1121 is used to connect to the end with the higher voltage between the two ends of the shunt 1110, and the second input terminal 1122 is used to connect to the end with the lower voltage between the two ends of the shunt 1110. When the optocoupler isolation conditioning unit is the second optocoupler isolation conditioning unit 1210, the first input terminal 1121 is used to connect to the end with the higher voltage between the two ends of the target fuse 2000, and the second input terminal 1122 is used to connect to the end with the lower voltage between the two ends of the target fuse 2000. When the optocoupler isolation conditioning unit is the third optocoupler isolation conditioning unit 1140, the first input terminal 1121 is used to connect to the output of the Hall current sensor 1130, and the second input terminal 1122 is used to connect to the ground terminal of the fuse monitoring system.

[0092] As shown in FIG4 , first input terminal 1121 is connected to the non-inverting input terminal of first operational amplifier A1, second input terminal 1122 is connected to the inverting input terminal of first operational amplifier A1, and the output terminal of first operational amplifier A1 is connected to first pin 1 of photocoupler U1, where first pin 1 corresponds to the anode of the light-emitting diode in photocoupler U1. Fifth pin 5 of photocoupler U1 is connected to ground terminal GND, and sixth pin 6 of photocoupler U1 is connected to output terminal 1123, where fifth pin 5 corresponds to the anode of the first photosensitive diode in photocoupler U1, and sixth pin 6 corresponds to the cathode of the first photosensitive diode in photocoupler U1.

[0093] As shown in FIG. 4 , the optocoupler isolation conditioning unit may further include a Zener diode D1 , wherein the anode of the Zener diode D1 is connected to the second input terminal 1122 , and the cathode of the Zener diode D1 is connected to the first input terminal 1121 .

[0094] As shown in FIG4 , the optocoupler isolation conditioning unit may further include a second operational amplifier A2. The inverting input of the second operational amplifier A2 may be connected to the output of the first operational amplifier A1, the non-inverting input of the second operational amplifier A2 is connected to the ground terminal GND, and the output of the second operational amplifier A2 is connected to the first pin 1 of the optocoupler U1. The inverting input of the second operational amplifier A2 is also connected to the third pin 3 of the optocoupler U1, and the fourth pin 4 of the optocoupler U1 is connected to the ground terminal GND. The third pin 3 corresponds to the cathode of the second photosensitive diode in the optocoupler U1, and the fourth pin 4 corresponds to the anode of the second photosensitive diode in the optocoupler U1.

[0095] As shown in Figure 4, the optocoupler isolation conditioning unit can also include a third operational amplifier A3, the non-inverting input terminal of the third operational amplifier A3 is connected to the ground terminal GND, the inverting input terminal of the third operational amplifier A3 is connected to the sixth pin 6 of the optocoupler U1, and the output terminal of the third operational amplifier A3 is connected to the output terminal 1123.

[0096] As shown in Figure 4 , the optocoupler isolation conditioning unit may also include a positive power supply terminal 1124, a negative power supply terminal 1125, a DCDC converter U2, and a linear regulator U3. Positive power supply terminal 1124 is connected to the positive terminal of the vehicle's battery, while negative power supply terminal 1125 is connected to the negative terminal of the vehicle's battery. Positive power supply terminal 1124 is connected to the positive input terminal Vi+ of DCDC converter U2, while negative power supply terminal 1125 is connected to the negative input terminal Vi- of DCDC converter U2. The positive output terminal Vo+ of DCDC converter U2 provides a positive voltage VCC1 for each operational amplifier, while the negative output terminal Vo- of DCDC converter U2 provides a negative voltage VEE1 for each operational amplifier. The input terminal IN of linear regulator U3 is connected to the positive output terminal Vo+ of DCDC converter U2, while the output terminal OUT of linear regulator U3 is connected to the second pin 2 of optocoupler U1, which corresponds to the cathode of the light-emitting diode in optocoupler U1.

[0097] As shown in FIG4 , the optocoupler isolation conditioning unit may further include at least one of a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a ninth resistor R9. The first resistor is connected between the inverting input terminal of the first operational amplifier A1 and the second input terminal 1122, the second resistor R2 and the third resistor R3 are connected in series between the output terminal of the first operational amplifier A1 and the inverting input terminal of the first operational amplifier A1, the fourth resistor R4 is connected between the output terminal of the first operational amplifier A1 and the inverting input terminal of the second operational amplifier A2, the fifth resistor R5 is connected between the non-inverting input terminal of the second operational amplifier A2 and the ground terminal GND, the sixth resistor R6 is connected between the output terminal of the second operational amplifier A2 and the first pin 1 of the optocoupler U1, the seventh resistor R7 and the eighth resistor R8 are connected between the inverting input terminal and the output terminal of the third operational amplifier A3, and the ninth resistor R9 is connected between the non-inverting input terminal of the first operational amplifier A1 and the first input terminal 1121.

[0098] As shown in Figure 4, the optocoupler isolation conditioning unit may further include at least one of a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6. The first capacitor C1 is connected between the inverting input terminal of the first operational amplifier A1 and the output terminal of the first operational amplifier A1, the second capacitor C2 is connected between the inverting input terminal of the third operational amplifier A3 and the output terminal of the third operational amplifier A3, the third capacitor C3 and the fourth capacitor C4 are connected in parallel between the output terminal OUT of the linear regulator U3 and the ground terminal GND, and the fifth capacitor C5 and the sixth capacitor C6 are connected in parallel between the input terminal IN of the linear regulator U3 and the ground terminal GND.

[0099] In this embodiment, optocoupler U1 comprises a high-performance light-emitting diode (LED) and two adjacent, matched photodiodes, each with identical performance parameters. The LED serves as the input for the isolated signal and emits light when current flows through it. Both photodiodes generate a photocurrent when illuminated by light. The internal packaging structure ensures that both photodiodes receive approximately the same amount of light from the LED, generating a photocurrent proportional to the luminous intensity, thus achieving current isolation between the input and output circuits. The isolated voltage signal is processed by a third operational amplifier (A3), improving the stability and linearity of the isolated signal.

[0100] In this optocoupler isolation conditioning unit, the first resistor R1 acts as a current limiter; the third resistor R3 is used to control the luminous intensity of the light-emitting diode in the optocoupler U1, thereby playing a certain role in controlling the channel gain; the first operational amplifier A1 and the second operational amplifier A2 function to enhance the load driving capability; the first capacitor C1 acts as a feedback, stabilizing the output of the first operational amplifier A1 and filtering out glitch signals in the circuit; and the second capacitor C2 can suppress the high-frequency noise generated by the optocoupler U1.

[0101] The voltage detection unit 1200 of this embodiment is provided by the second optocoupler isolation conditioning unit, and the current detection unit 1100 includes the first optocoupler isolation conditioning unit or the third optocoupler isolation conditioning unit, which can effectively isolate the high-voltage line where the target fuse is located from the low-voltage line and the weak-current line of the fuse monitoring system, prevent interference and other adverse effects, and ensure the electrical safety of the weak-current line.

[0102] In this embodiment, the resistance of the fuse is an important parameter for determining the health status of the fuse.

[0103] In one embodiment of the present disclosure, the current current and the current voltage may correspond to the same moment. The integrated control unit 1300 may determine a first resistance value of the target fuse based on the current voltage and the current current, and determine a health status of the target fuse based on the first resistance value.

[0104] Specifically, the integrated control unit 1300 may determine a ratio of the current voltage divided by the current current as the first resistance.

[0105] In one embodiment of the present disclosure, as shown in FIG. 2 and FIG. 3 , the fuse monitoring system 1000 further includes a temperature detection unit 1400 .

[0106] The temperature detection unit 1400 is disposed in a first preset range close to the target fuse 2000 and is connected to the integrated control unit 1300. The first preset range may be set according to the detection range of the temperature detection unit 1400.

[0107] The temperature detection unit 1400 is configured to detect a current temperature of the target fuse 2000 .

[0108] The integrated control unit 1300 is configured to obtain a current temperature; determine a temperature coefficient corresponding to the current temperature as a current temperature coefficient; and correct the first resistance value according to the current temperature coefficient.

[0109] In some embodiments, the temperature detection unit 1400 is in contact with the contact of the target fuse 2000 to detect the current temperature of the contact of the target fuse 2000 .

[0110] In some embodiments, second mapping data reflecting the mapping relationship between temperature and temperature coefficient may be preset; and the temperature coefficient corresponding to the current temperature is obtained as the current temperature coefficient according to the current temperature and the second mapping data.

[0111] The second mapping data may be a second mapping function, or a second comparison table, etc., which is not limited here.

[0112] For the second mapping function, the dependent variable of the second mapping function is the temperature coefficient, and the independent variable is the temperature. Thus, by substituting the current temperature into the second mapping function, the current temperature coefficient corresponding to the current temperature can be obtained.

[0113] The second lookup table can be used to find the current temperature coefficient corresponding to the current temperature. If the current temperature cannot be directly found in the second lookup table, two values ​​adjacent to the current temperature can be found and, based on the two values ​​and the temperature coefficients corresponding to the two values, the current temperature coefficient corresponding to the current temperature can be obtained by interpolation.

[0114] In some embodiments, multiple temperature ranges and temperature coefficients corresponding to each temperature range may be pre-set. Then, the temperature coefficient corresponding to the temperature range in which the current temperature is located may be determined as the current temperature coefficient.

[0115] In some embodiments, correcting the first resistance value according to the current temperature coefficient may be performed by multiplying the current temperature coefficient by the first resistance value.

[0116] In this embodiment, the first resistance value is corrected according to the current temperature coefficient, so that the health status data of the target fuse 2000 subsequently obtained according to the first resistance value can be more accurate.

[0117] In one embodiment of the present disclosure, the integrated control unit 1300 is configured to: determine the abnormal operating duration of the target fuse 2000 when the current temperature is greater than or equal to the set temperature, where the abnormal operating duration is the cumulative continuous duration during which the temperature of the target fuse 2000 is greater than or equal to the set temperature; and monitor the health status of the target fuse 2000 based on the abnormal operating duration.

[0118] It is understood that the set temperature may be pre-set according to the application scenario or specific requirements. For example, the set temperature may be 100 degrees Celsius.

[0119] In this embodiment, in order to determine the abnormal operation duration of the target fuse 2000, the abnormal operation duration may be reset to zero when the current temperature is lower than a set value.

[0120] In some embodiments, the integrated control unit 1300 may determine that the health status of the target fuse 2000 is abnormal if the abnormal operation duration is greater than or equal to a set duration; and determine that the health status of the target fuse 2000 is normal if the abnormal operation duration is less than the set duration. The set duration may be pre-set based on the application scenario or specific needs. For example, the set duration may be 20 minutes.

[0121] This embodiment monitors the health status of the target fuse according to the abnormal working duration, which can increase the basis for determining the health status and improve the accuracy of the obtained health status data.

[0122] In some embodiments, the integrated control unit 1300 is configured to compare the first resistance value with a set resistance value; if the first resistance value is greater than or equal to the set resistance value, determine that the health status of the target fuse 2000 is abnormal; if the first resistance value is less than the set resistance value, determine that the health status of the target fuse 2000 is normal. The set resistance value can be pre-set based on the application scenario or specific needs.

[0123] In some embodiments, the integrated control unit 1300 is configured to: obtain the cold resistance value of the target fuse 2000; determine the proportional coefficient between the first resistance value and the cold resistance value; and monitor the health status of the target fuse 2000 according to the proportional coefficient.

[0124] In one example, the cold resistance value may be the resistance value of the target fuse 2000 when there is no current, that is, at room temperature, generally referring to the resistance value at 25°C.

[0125] In another example, when the vehicle is started for the first time, the initial current flowing through the target fuse can be obtained through the current detection unit 1100, and the initial voltage across the target fuse can be detected through the voltage detection unit 1200. When the initial current is less than or equal to the set current, the ratio of the initial voltage to the initial current is determined as the cold resistance value.

[0126] Furthermore, the integrated control unit 1300 may determine that the health status of the target fuse 2000 is abnormal when the proportional coefficient is greater than or equal to a first coefficient threshold; and determine that the health status of the target fuse 2000 is normal when the proportional coefficient is less than the first coefficient threshold. The first coefficient threshold may be pre-set based on the application scenario or specific requirements. For example, the first coefficient threshold is 1.5.

[0127] In one embodiment of the present disclosure, when the health status of the target fuse 2000 is abnormal, the integrated control unit 1300 is further configured to determine the remaining service life of the target fuse 2000 according to the proportional coefficient.

[0128] In one embodiment, determining the remaining service life of the target fuse 2000 based on the proportional coefficient may include: obtaining first mapping data reflecting the mapping relationship between the proportional coefficient and the remaining service life; obtaining the remaining service life of the target fuse 2000 based on the proportional coefficient of the first resistance value and the cold resistance value, and the first mapping data.

[0129] The first mapping data may be a first mapping function, or a first comparison table, etc., which is not limited here.

[0130] For the first mapping function, the dependent variable of the first mapping function is the remaining service life, and the independent variable is the proportional coefficient. In this way, by substituting the proportional coefficient between the first resistance value and the cold resistance value into the first mapping function, the remaining service life corresponding to the proportional coefficient can be obtained.

[0131] For the first lookup table, the remaining service life corresponding to the proportional coefficient between the first resistance value and the cold resistance value can be found in the first lookup table. If the proportional coefficient cannot be directly found in the first lookup table, two values ​​adjacent to the proportional coefficient can be found. Based on these two values ​​and the remaining service lives corresponding to these two values, the remaining service life corresponding to the proportional coefficient can be obtained by interpolation.

[0132] In one embodiment, the integrated control unit 1300 can predict the remaining service life of the target fuse 2000 based on the user's driving habits and the proportional coefficient. The remaining service life can be expressed as the number of extreme operating conditions such as sudden acceleration that the user can perform.

[0133] In one embodiment of the present disclosure, the integrated control unit 1300 is configured to determine a first resistance value of the target fuse 2000 each time the vehicle is powered on, and monitor the health status of the target fuse 2000 based on the first resistance value.

[0134] In another embodiment of the present disclosure, the integrated control unit 1300 is configured to: determine a first resistance value of the target fuse 2000 when a set time is reached, and monitor the health status of the target fuse 2000 based on the first resistance value. The set time can be pre-set based on the application scenario or specific needs.

[0135] In one embodiment of the present disclosure, the integrated control unit 1300 is configured to: determine the Joule integral of the target fuse 2000 based on the current current when the current current is greater than or equal to the set current; and determine the first resistance of the target fuse 2000 when the Joule integral is greater than or equal to the set value.

[0136] In this embodiment, the integrated control unit 1300 can sample the continuous current detected by the current detection unit 1100 at a set frequency to obtain multiple discrete currents. During the current detection process by the current detection unit 1100, if the most recently obtained current current is greater than or equal to the set current, the square value of the current current is discretely integrated to obtain the Joule integral of the target fuse 2000. When the Joule integral of the target fuse 2000 accumulates to a value greater than or equal to the set value, the health status of the target fuse 2000 is determined according to the aforementioned embodiment.

[0137] When the Joule integral of the target fuse 2000 does not accumulate to a value greater than or equal to the set value, the health status of the target fuse is usually normal and it is not necessary to monitor it, thus saving the computing power of the integrated control unit.

[0138] In one embodiment of the present disclosure, as shown in Figures 2 and 3 , the fuse monitoring system 1000 further includes a communication unit 1500. The communication unit 1500 is connected to the integrated control unit 1300 and is configured to connect to the integrated control unit 1300 and the electronic control unit 3000 of the vehicle.

[0139] In one example, the communication unit 1500 may be connected to the electronic control unit 3000 of the vehicle via a CAN network.

[0140] The integrated control unit 1300 is configured to transmit the health status data of the target fuse 2000 to the electronic control unit 3000 through the communication unit 1500 .

[0141] In this embodiment, the health status data of the target fuse 2000 may include at least one of the following: whether the health status of the target fuse is normal or abnormal, a proportionality coefficient, a remaining service life, a Joule integral, and a first resistance value.

[0142] In one example, when the health status of the target fuse is abnormal, the electronic control unit 3000 may send a life warning to the backend server, or issue an abnormal reminder through the vehicle's dashboard.

[0143] In one example, the electronic control unit 3000 may send a life warning to the backend server when the proportional coefficient is greater than or equal to a second coefficient threshold. The second coefficient threshold may be pre-set based on the application scenario or specific needs, for example, the second coefficient threshold may be 2.

[0144] In one example, the electronic control unit 3000 may control a dashboard of a vehicle to display health status data of the target fuse 2000 .

[0145] In one example, the electronic control unit 3000 may determine the remaining service life based on a proportional coefficient and a user's driving habits.

[0146] Through this embodiment, the user can be reminded to replace the target fuse in time to prevent the user from driving under extreme conditions such as sudden acceleration when the target fuse is faulty, thereby ensuring the user's driving safety.

[0147] This embodiment further provides a power distribution system. As shown in FIG5 , the power distribution system 4000 includes a fuse 4100 and the fuse monitoring system 1000 as described in the above embodiment.

[0148] The power distribution system of this embodiment can be a high-voltage power distribution system or a low-voltage power distribution system. Specifically, the fuse can be connected to the power supply circuit of the vehicle's power battery or the power supply circuit of the vehicle's starting battery.

[0149] Furthermore, a plurality of fuses may be provided in the power distribution system, and a fuse monitoring system 1000 corresponding to each fuse may be provided. Each fuse monitoring system 1000 may be used to monitor the health status of the corresponding fuse.

[0150] This embodiment further provides a fuse monitoring method, as shown in FIG6 , which may include steps S5100 to S5200 as follows:

[0151] Step S5100: Detect the current current flowing through the target fuse to be monitored and the current voltage across the target fuse.

[0152] In this embodiment, the target current may be detected by the current detection unit 1100 in the aforementioned embodiment, and the target voltage may be detected by the voltage detection unit 1200 in the aforementioned embodiment.

[0153] Step S5200: Monitor the health status of the target fuse according to the current current and the current voltage.

[0154] In one embodiment of the present disclosure, monitoring the health status of a target fuse according to a current current and a current voltage may include: determining a first resistance value of the target fuse according to the current current and the current voltage; and monitoring the health status of the target fuse according to the first resistance value.

[0155] In one embodiment, the ratio of the current voltage divided by the current current may be determined as the first resistance.

[0156] In another embodiment, the method may further include: acquiring a current temperature of the target fuse; determining a temperature coefficient corresponding to the current temperature as a current temperature coefficient; and correcting the first resistance value according to the current temperature coefficient.

[0157] The current temperature may be detected by a temperature detection unit disposed within a first preset range close to the target fuse.

[0158] In some embodiments, second mapping data reflecting the mapping relationship between temperature and temperature coefficient may be preset; and the temperature coefficient corresponding to the current temperature is obtained as the current temperature coefficient according to the current temperature and the second mapping data.

[0159] The second mapping data may be a second mapping function, or a second comparison table, etc., which is not limited here.

[0160] For the second mapping function, the dependent variable of the second mapping function is the temperature coefficient, and the independent variable is the temperature. Thus, by substituting the current temperature into the second mapping function, the current temperature coefficient corresponding to the current temperature can be obtained.

[0161] The second lookup table can be used to find the current temperature coefficient corresponding to the current temperature. If the current temperature cannot be directly found in the second lookup table, two values ​​adjacent to the current temperature can be found and, based on the two values ​​and the temperature coefficients corresponding to the two values, the current temperature coefficient corresponding to the current temperature can be obtained by interpolation.

[0162] In some embodiments, multiple temperature ranges and temperature coefficients corresponding to each temperature range may be pre-set. Then, the temperature coefficient corresponding to the temperature range in which the current temperature is located may be determined as the current temperature coefficient.

[0163] In some embodiments, correcting the first resistance value according to the current temperature coefficient may be performed by multiplying the current temperature coefficient by the first resistance value.

[0164] In one embodiment, each time the vehicle is powered on, the first resistance of the target fuse is determined, and the health status of the target fuse is monitored based on the first resistance.

[0165] In one embodiment, when a set time is reached, the first resistance of the target fuse is determined, and the health status of the target fuse is monitored based on the first resistance. The set time can be pre-set according to the application scenario or specific needs.

[0166] In one embodiment, before executing step S5200, the method may further include: determining the Joule integral of the target fuse based on the current current when the current current is greater than or equal to the set current; and determining the health status of the target fuse when the Joule integral is greater than or equal to the set value.

[0167] In this embodiment, the continuous current detected by the current detection unit can be sampled at a set frequency to obtain multiple discrete currents. During the current detection process, if the most recently obtained current current is greater than or equal to the set current, the square value of the current current is discretely integrated to obtain the Joule integral of the target fuse. If the Joule integral of the target fuse accumulates to a value greater than or equal to the set value, the first resistance of the target fuse is determined according to the above embodiment.

[0168] When the Joule integral of the target fuse does not accumulate to a value greater than or equal to the set value, the health status of the target fuse is usually normal and it is not necessary to monitor it, thus saving the computing power of the integrated control unit.

[0169] In one embodiment of the present disclosure, monitoring the health status of a target fuse based on a first resistance value may include: determining that the health status of the target fuse is abnormal when the first resistance value is greater than or equal to a set resistance value; and determining that the health status of the target fuse is normal when the first resistance value is less than the set resistance value. The set resistance value may be pre-set based on an application scenario or specific needs.

[0170] In another embodiment of the present disclosure, monitoring the health status of a target fuse based on a first resistance value includes: obtaining the cold resistance value of the target fuse; determining a proportional coefficient between the first resistance value and the cold resistance value; and monitoring the health status of the target fuse based on the proportional coefficient.

[0171] In one example, the cold resistance value may be the resistance value of the target fuse 2000 when there is no current, that is, at room temperature, generally referring to the resistance value at 25°C.

[0172] In another example, when the vehicle is started for the first time, the initial current flowing through the target fuse can be obtained through the current detection unit, and the initial voltage across the target fuse can be detected through the voltage detection unit. When the initial current is less than or equal to the set current, the ratio of the initial voltage to the initial current is determined as the cold resistance value.

[0173] Furthermore, if the proportionality coefficient is greater than or equal to a first coefficient threshold, the target fuse's health status is determined to be abnormal; if the proportionality coefficient is less than the first coefficient threshold, the target fuse's health status is determined to be normal. The first coefficient threshold can be pre-set based on the application scenario or specific requirements. For example, the first coefficient threshold is 1.5.

[0174] In one embodiment of the present disclosure, the method may further include: when the current temperature is greater than or equal to the set temperature, determining the abnormal operating time of the target fuse, the abnormal operating time being the cumulative continuous time that the temperature of the target fuse is greater than or equal to the set temperature; and monitoring the health status of the target fuse according to the abnormal operating time.

[0175] It is understood that the set temperature may be pre-set according to the application scenario or specific requirements. For example, the set temperature may be 100 degrees Celsius.

[0176] In this embodiment, in order to determine the abnormal operation duration of the target fuse, the abnormal operation duration may be reset to zero when the current temperature is lower than the set temperature.

[0177] In some embodiments, if the abnormal operation duration is greater than or equal to a set duration, the health status of the target fuse is determined to be abnormal; if the abnormal operation duration is less than the set duration, the health status of the target fuse is determined to be normal. The set duration can be pre-set based on the application scenario or specific needs. For example, the set duration can be 20 minutes.

[0178] This embodiment monitors the health status of the target fuse according to the abnormal working duration, which can increase the basis for determining the health status and improve the accuracy of the obtained health status data.

[0179] In one embodiment of the present disclosure, the method further includes: determining the remaining service life of the target fuse according to the proportional coefficient when the health status of the target fuse is abnormal.

[0180] In one embodiment, determining the remaining service life of the target fuse 2000 based on the proportional coefficient may include: obtaining first mapping data reflecting the mapping relationship between the proportional coefficient and the remaining service life; obtaining the remaining service life of the target fuse 2000 based on the proportional coefficient of the first resistance value and the cold resistance value, and the first mapping data.

[0181] The first mapping data may be a first mapping function, or a first comparison table, etc., which is not limited here.

[0182] For the first mapping function, the dependent variable of the first mapping function is the remaining service life, and the independent variable is the proportional coefficient. In this way, by substituting the proportional coefficient between the first resistance value and the cold resistance value into the first mapping function, the remaining service life corresponding to the proportional coefficient can be obtained.

[0183] For the first lookup table, the remaining service life corresponding to the proportional coefficient between the first resistance value and the cold resistance value can be found in the first lookup table. If the proportional coefficient cannot be directly found in the first lookup table, two values ​​adjacent to the proportional coefficient can be found. Based on these two values ​​and the remaining service lives corresponding to these two values, the remaining service life corresponding to the proportional coefficient can be obtained by interpolation.

[0184] In one embodiment, the remaining service life of the target fuse can be predicted based on the user's driving habits and the proportionality coefficient. The remaining service life can be expressed as the number of extreme operating conditions such as sudden acceleration that the user can perform.

[0185] In one embodiment of the present disclosure, the method further includes: sending the health status data of the target fuse to an electronic control unit of the vehicle.

[0186] In this embodiment, the health status data of the target fuse may include at least one of the following: a result indicating whether the health status of the target fuse is normal or abnormal, a proportionality coefficient, a remaining service life, a Joule integral, and a first resistance value.

[0187] In one example, the electronic control unit may send a life warning to a backend server or issue an abnormal reminder through the vehicle's dashboard when the health status of the target fuse is abnormal.

[0188] In one example, the electronic control unit may send a life warning to the backend server when the proportional coefficient is greater than or equal to a second coefficient threshold. The second coefficient threshold may be pre-set based on the application scenario or specific needs, for example, the second coefficient threshold may be 2.

[0189] In one example, the electronic control unit may control a dashboard of a vehicle to display health status data of a target fuse.

[0190] In one example, the electronic control unit may determine the remaining service life based on a proportionality factor and a user's driving habits.

[0191] Through this embodiment, the user can be reminded to replace the target fuse in time to prevent the user from driving under extreme conditions such as sudden acceleration when the target fuse is faulty, thereby ensuring the user's driving safety.

[0192] FIG7 is a schematic diagram of an example of a fuse monitoring method provided in this embodiment.

[0193] As shown in FIG6 , the method may include steps S6001 to S6011 as follows:

[0194] Step S6001: Detect the current flowing through the target fuse to be monitored.

[0195] Step S6002, determining whether the current current is greater than or equal to the set current, if yes, executing step S6003, if not, executing step S6001.

[0196] Step S6003: Determine the Joule integral of the target fuse according to the current current.

[0197] Step S6004, determine whether the Joule integral is greater than or equal to the set value, if yes, execute step S6005, if not, execute step S6001.

[0198] Step S6005: Detect the current voltage across the target fuse.

[0199] Step S6006: Determine the ratio of the current voltage to the current current as the first resistance of the target fuse.

[0200] Step S6007: Obtain the current temperature of the target fuse.

[0201] Step S6008: Determine the temperature coefficient corresponding to the current temperature as the current temperature coefficient.

[0202] Step S6009: correct the first resistance value according to the current temperature coefficient.

[0203] Step S6010: determining a proportionality coefficient between the first resistance value and the cold resistance value.

[0204] Step S6011: monitor the health status of the target fuse according to the proportional coefficient.

[0205] As another aspect, this embodiment provides a fuse monitoring device. As shown in Figure 8, the fuse monitoring device 8000 includes a memory 8100 and a processor 8200. The memory 8100 is used to store a computer program, and the processor is used to execute the fuse monitoring method described in any method embodiment of this specification under the control of the computer program.

[0206] This embodiment further provides a vehicle, which may include the power distribution system 4000 described in the above embodiment, or may include the fuse monitoring device 8000 described in the above embodiment.

[0207] In one example, the vehicle may also have at least one of other hardware structures such as a processor, a processor engine, a motor controller, a sensing device, an input device, an interface device, an output device, a motor, a power battery, etc., which are not limited here.

[0208] The rear end of the engine (the end connected to the flywheel) can be connected to the input end of the speed reducer through a clutch, and the output end of the speed reducer is connected to the wheel shaft so that the wheel can be driven to rotate by the engine.

[0209] The motor controller is used to control the motor action according to the control instructions sent by the processor. For example, it controls the motor output torque to drive the wheel shaft to rotate; for example, it controls the motor to feed electrical energy back to the power battery.

[0210] The sensing device may include various sensors, for example, at least one of a rotation speed sensor, a posture sensor, a temperature sensor, a humidity sensor, a pressure sensor, etc.

[0211] The input device may include a key circuit, a touch screen, a microphone, a knob circuit, an accelerator control device with an accelerator pedal, a brake control device with a brake pedal, and the like.

[0212] The interface device may include a headphone jack, an on-board diagnostics (OBD) system diagnostic interface, a charging interface, a USB interface, and the like.

[0213] Output devices may include display screens, speakers, various indicator lights, etc.

[0214] When the motor is used as an electric motor, the power battery can be used to provide electrical energy to the motor.

[0215] It should be noted that although the operations of the present method are described in a particular order in the accompanying drawings, this does not require or imply that the operations must be performed in that particular order, or that all of the operations shown must be performed to achieve the desired results. Rather, the steps depicted in the flowcharts may be performed in a different order. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into a single step, and / or a single step may be broken down into multiple steps.

[0216] The present application may be a system, method and / or computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present application.

[0217] A computer-readable storage medium can be a tangible device that can hold and store instructions for use by an instruction execution device. A computer-readable storage medium can be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination thereof. As used herein, a computer-readable storage medium is not to be construed as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through an electrical wire.

[0218] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions to be stored in the computer-readable storage medium in each computing / processing device.

[0219] The computer program instructions for performing the operation of the present application can be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data or source code or object code written in any combination of one or more programming languages, wherein the programming language includes object-oriented programming languages ​​such as Smalltalk, C++, and conventional procedural programming languages ​​such as "C" language or similar programming languages. Computer-readable program instructions can be executed completely on the user's computer, partially on the user's computer, executed as an independent software package, partially on the user's computer and partially on a remote computer, or executed completely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer by any type of network including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (such as by using an Internet service provider to connect to the Internet). In certain embodiments, by utilizing the state information of computer-readable program instructions to personalize electronic circuits, such as programmable logic circuits, field programmable gate arrays (FPGAs) or programmable logic arrays (PLAs), the electronic circuits can execute computer-readable program instructions, thereby realizing various aspects of the present application.

[0220] Various aspects of the present application are described herein with reference to flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each block of the flowcharts and / or block diagrams, and combinations of blocks in the flowcharts and / or block diagrams, can be implemented by computer-readable program instructions.

[0221] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the processor of the computer or other programmable data processing device, a device is generated that implements the functions / actions specified in one or more blocks in the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium, where these instructions cause the computer, programmable data processing device, and / or other device to operate in a specific manner. Thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing various aspects of the functions / actions specified in one or more blocks in the flowchart and / or block diagram.

[0222] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operational steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to implement the functions / actions specified in one or more blocks in the flowchart and / or block diagram.

[0223] The flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the systems, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a part of a module, program segment or instruction, and the part of the module, program segment or instruction contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of the boxes in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions. It is well known to those skilled in the art that implementation by hardware, implementation by software, and implementation by a combination of software and hardware are all equivalent.

[0224] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terms used herein are selected to best explain the principles of the embodiments, their practical applications, or technical improvements in the marketplace, or to enable other persons skilled in the art to understand the embodiments disclosed herein. The scope of this application is defined by the appended claims.

Claims

1. A fuse monitoring system, characterized in that: include: a current detection unit configured to detect a current flowing through the target fuse; a voltage detection unit, the voltage detection unit being connected to the target fuse, the voltage detection unit being configured to detect a current voltage across the target fuse; An integrated control unit is connected to the current detection unit and the voltage detection unit, and is configured to determine a health status of the target fuse according to the current current and the current voltage.

2. The fuse monitoring system according to claim 1, characterized in that: The current detection unit includes: a shunt connected to a power supply circuit of the target fuse; A first optocoupler isolation conditioning unit, wherein an input end of the first optocoupler isolation conditioning unit is connected to two ends of the shunt, and an output end of the first optocoupler isolation conditioning unit is connected to the integrated control unit.

3. The fuse monitoring system according to claim 1, characterized in that: Also includes: A temperature detection unit is provided in a first preset range close to the target fuse and is connected to the integrated control unit.

4. The fuse monitoring system according to claim 1, characterized in that: Also includes: a communication unit connected to the integrated control unit and adapted to be connected to an electronic control unit of a vehicle; The communication unit is configured to acquire health status data of the target fuse sent by the integrated control unit and send the health status data to the electronic control unit.

5. The fuse monitoring system according to claim 1, characterized in that: The voltage detection unit includes a second optical coupling isolation conditioning unit, An input end of the second optical coupler isolation conditioning unit is connected to two ends of the target fuse, and an output end of the second optical coupler isolation conditioning unit is connected to the integrated control unit.

6. The fuse monitoring system according to claim 1, characterized in that: The current detection unit further includes: a Hall current sensor, the Hall current sensor being disposed within a second preset range close to the target fuse; A third optocoupler isolation conditioning unit, wherein the input end of the third optocoupler isolation conditioning unit is connected to the Hall current sensor, and the output end of the third optocoupler isolation conditioning unit is connected to the integrated control unit.

7. A fuse monitoring method, characterized in that: include: Detecting a current current flowing through a target fuse to be monitored and a current voltage across both ends of the target fuse; A health status of the target fuse is determined according to the current current and the current voltage.

8. The method according to claim 7, characterized in that The determining the health status of the target fuse according to the current current and the current voltage specifically includes: determining a first resistance value of the target fuse according to the current current and the current voltage; A health status of the target fuse is determined according to the first resistance value.

9. The method according to claim 8, characterized in that After determining the first resistance value of the target fuse, the method further includes: Obtaining the current temperature of the target fuse; determining a temperature coefficient corresponding to the current temperature as the current temperature coefficient; The first resistance value is corrected according to the current temperature coefficient.

10. The method according to claim 8, characterized in that The determining the state of the target fuse according to the first resistance value includes: Obtaining a second resistance value of the target fuse, where the second resistance value represents a cold resistance value of the target fuse; determining a proportionality coefficient between the first resistance and the second resistance; The health status of the target fuse is determined according to the proportional coefficient.

11. The method according to claim 10, characterized in that The method further comprises: When the proportional coefficient is greater than or equal to a first coefficient threshold, the remaining service life of the target fuse is determined according to the proportional coefficient.

12. The method according to claim 11, characterized in that Determining the remaining service life of the target fuse according to the proportional coefficient includes: Acquire first mapping data reflecting a mapping relationship between a proportional coefficient and a remaining useful life; The remaining service life of the target fuse is obtained according to a proportional coefficient between the first resistance value and the second resistance value and the first mapping data.

13. The method according to claim 7, characterized in that The method further comprises: When the current current is greater than or equal to the set current, determining the Joule integral of the target fuse according to the current current; When the Joule integral is greater than or equal to a set value, the step of determining the health status of the target fuse according to the current current and the current voltage is performed.

14. The method according to claim 7, wherein: The method further comprises: Obtaining the current temperature of the target fuse; When the current temperature is greater than or equal to the set temperature, determining the abnormal operation duration of the target fuse, the abnormal operation duration being the cumulative continuous duration during which the temperature of the target fuse is greater than or equal to the set temperature; The health status of the target fuse is monitored according to the abnormal operation duration.

15. A fuse monitoring device, characterized in that: The method comprises a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to execute the method according to any one of claims 7 to 14 under the control of the computer program.

16. A power distribution system, characterized in that: The invention comprises a fuse and a fuse monitoring system according to any one of claims 1 to 6.

17. A vehicle, characterized in that: The method comprises the power distribution system according to claim 16 , or the fuse monitoring device according to claim 15 .

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