CN112776606A - High-voltage interlocking loop and detection method and device thereof - Google Patents
High-voltage interlocking loop and detection method and device thereof Download PDFInfo
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- CN112776606A CN112776606A CN202110199401.4A CN202110199401A CN112776606A CN 112776606 A CN112776606 A CN 112776606A CN 202110199401 A CN202110199401 A CN 202110199401A CN 112776606 A CN112776606 A CN 112776606A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2843—In-circuit-testing
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Abstract
The invention provides a high-voltage interlocking loop and a detection method and a detection device thereof, and relates to the technical field of electric automobiles, wherein the high-voltage interlocking loop comprises the following components: a controller and a plurality of high voltage loads; a sampling resistor is arranged in each interlocking port of the high-voltage load; each sampling resistor is respectively connected in parallel with two ends of the controller; the controller is used for supplying power to the sampling resistor and collecting the current of the sampling resistor. The scheme of the invention adopts a parallel structure, and can quickly identify the high-voltage load with faults on the high-voltage interlocking loop by collecting the current of the sampling resistor, thereby carrying out effective high-voltage protection.
Description
Technical Field
The invention belongs to the technical field of electric automobiles, and particularly relates to a high-voltage interlocking loop and a detection method and device thereof.
Background
The HVIL (High Voltage Interlock Loop) tests the electrical integrity or connectivity of the entire High Voltage components, wires, connectors, and cover through the low Voltage Loop. When the B-level loop is identified to be abnormally connected and a fault point exists, the high-voltage loop can be controlled or disconnected in time, and the functions and purposes are as follows:
(1) the safety of personnel and equipment is protected, and the injury of personnel and equipment around the fault point is avoided.
(2) Abnormal conditions such as virtual connection, loosening and the like of the high-voltage plug connector are monitored in real time, and accidents such as power loss are avoided.
(3) The high-voltage interlocking plays a role in the collision power-off process, and when any damage of a high-voltage circuit is detected, high-voltage power-off is carried out.
At present, the electric vehicle generally adopts a loop series high-voltage interlock scheme, i.e. a pair of pins of a controller are used as a power supply for detecting a low-voltage interlock loop, so that a low-voltage signal is transmitted along a closed low-voltage loop, for example, two pins of a battery management unit controller are used as detection ports, and are respectively connected in series with a direct-current power converter, a slow charging interface, a rear motor controller, a battery box main positive interface, a fast charging interface, a micro switch of an upper cover of a high-voltage power integration unit, a front motor controller, a battery box main negative interface, a positive temperature coefficient thermistor, a water heating component end, an electric compressor, an air conditioner, a high-voltage box, a direct-current power converter load end, a charger load end, a rear motor controller load end, a front motor controller load end, an air conditioner load end and an electric compressor load end, when a low-voltage, the problem of troubleshooting is difficult when the number of corresponding high-voltage components is large or the arrangement of the high-voltage components is scattered, even if a midpoint troubleshooting method is adopted, much time is still wasted, when a fault occurs, a high-voltage protection strategy is simple, an accurate control scheme cannot be made for the fault point, only limited power driving or high voltage cutting-off can be adopted, and user experience is seriously influenced.
Disclosure of Invention
The embodiment of the invention aims to provide a high-voltage interlocking circuit and a detection method and device thereof, so as to solve the problem that diagnosis is difficult when a fault point occurs in the high-voltage interlocking circuit in the prior art.
In order to achieve the above object, an embodiment of the present invention provides a high-voltage interlock circuit applied to an electric vehicle, including: a controller and a plurality of high voltage loads;
a sampling resistor is arranged in each interlocking port of the high-voltage load;
each sampling resistor is respectively connected in parallel with two ends of the controller;
the controller is used for supplying power to the sampling resistor and collecting the current of the sampling resistor.
Optionally, a power supply pin of the controller is connected to one end of each sampling resistor, and a sampling pin of the controller is connected to the other end of each sampling resistor.
Optionally, the resistance value of each of the sampling resistors is different.
The embodiment of the invention also provides a detection method of the high-voltage interlocking circuit, which is applied to the high-voltage interlocking circuit and comprises the following steps:
acquiring a sampling current value acquired by the controller;
obtaining a comparison result of the sampling current value and a preset sampling current value;
according to the comparison result, whether the high-voltage interlocking loop has a fault or not is confirmed;
and when the high-voltage interlocking loop breaks down, confirming the target high-voltage load which breaks down according to the comparison result and the preset current value of each sampling resistor.
Optionally, the method further comprises:
and performing high-voltage protection according to the target high-voltage load.
Optionally, when the target high-voltage load is at least one of the following, controlling an instrument of the electric vehicle to display an alarm signal to perform high-voltage protection:
the device comprises an air conditioner, a compressor, a charger, a slow charging interface and a fast charging interface.
Optionally, when the target high-voltage load is at least one of the following, controlling an instrument of the electric vehicle to display an alarm signal and turn off a comfort load, and performing high-voltage protection:
the device comprises a direct-current power supply converter, a high-voltage power integrated unit, a maintenance switch and a steering motor.
Optionally, when the target high-voltage load is at least one of the following, controlling an instrument of the electric vehicle to display an alarm signal, turning off a comfort load, and turning off the high-voltage power, so as to perform high-voltage protection:
the brake device comprises a motor controller, a motor, a battery anode, a battery cathode and a brake motor.
Optionally, obtaining the sampled current value collected by the controller includes:
acquiring the current of each sampling resistor acquired by the controller;
and obtaining the sampling current value acquired by the controller as the sum of the currents of each sampling resistor according to the kirchhoff current law.
Optionally, determining whether a fault occurs on the high-voltage interlock circuit according to the comparison result includes:
when the comparison result is that the sampling current value is equal to a preset sampling current value, determining that no fault occurs on the high-voltage interlocking loop;
and when the comparison result shows that the sampling current value is smaller than the preset sampling current value, confirming that a fault occurs on the high-voltage interlocking loop.
Optionally, when a fault occurs in the high-voltage interlock circuit, determining a target high-voltage load with the fault according to the comparison result and the preset current value of each sampling resistor, including:
according to the comparison result, confirming the difference value of the sampling current value and the preset sampling current value;
and selecting the sampling resistor equal to the difference value from the preset current values of all the sampling resistors as a target sampling resistor, and confirming that the target high-voltage load corresponding to the target sampling resistor has a fault.
The embodiment of the present invention further provides a detection apparatus for a high-voltage interlock circuit, which is applied to any one of the above high-voltage interlock circuits, and includes:
the acquisition module is used for acquiring the sampling current value acquired by the controller;
the acquisition module is used for acquiring a comparison result of the sampling current value and a preset sampling current value;
the first confirming module is used for confirming whether a fault occurs on the high-voltage interlocking loop or not according to the comparison result;
and the second confirming module is used for confirming the target high-voltage load with faults according to the comparison result and the preset current value of each sampling resistor when the high-voltage interlocking loop has faults.
The embodiment of the invention also provides an electric automobile which comprises the high-voltage interlocking circuit and the detection device of the high-voltage interlocking circuit.
The technical scheme of the invention at least has the following beneficial effects:
in the above aspect, the high-voltage interlock circuit includes: a controller and a plurality of high voltage loads; a sampling resistor is arranged in each interlocking port of the high-voltage load; each sampling resistor is respectively connected in parallel with two ends of the controller; the controller is used for doing the power supply of sampling resistor to gather the electric current of sampling resistor adopts parallel structure under the condition of the hardware port that does not increase the controller, through the electric current of gathering sampling resistor, can discern the high-voltage load that breaks down on the high-pressure interlocking return circuit fast, carries out effectual high-voltage protection, improves user experience.
Drawings
FIG. 1 is a schematic diagram of a high-pressure interlock loop according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for detecting a high-voltage interlock loop according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a detection device of a high-voltage interlock circuit according to an embodiment of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention provides a high-voltage interlocking circuit and a detection method and device thereof, aiming at the problem that diagnosis is difficult when a fault point occurs in the high-voltage interlocking circuit in the prior art.
As shown in fig. 1, an embodiment of the present invention provides a high-voltage interlock circuit applied to an electric vehicle, including: a controller 1 and a plurality of high voltage loads;
a sampling resistor is arranged in each interlocking port of the high-voltage load;
each sampling resistor is respectively connected in parallel with two ends of the controller 1;
the controller 1 is used for supplying power to the sampling resistor and collecting the current of the sampling resistor.
The embodiment of the invention comprises a controller 1 and a plurality of high-voltage loads; a sampling resistor is arranged in each interlocking port of the high-voltage load; each sampling resistor is respectively connected in parallel with two ends of the controller 1; the controller 1 is used for supplying power to the sampling resistor and collecting current of the sampling resistor, under the condition that a hardware port of the controller 1 is not increased, a parallel structure is adopted, the current of the sampling resistor is collected, a high-voltage load which breaks down on a high-voltage interlocking loop can be rapidly identified, effective high-voltage protection is carried out, and user experience is improved.
Optionally, a power supply pin 101 of the controller 1 is connected to one end of each sampling resistor, and a sampling pin 102 of the controller is connected to the other end of each sampling resistor.
It should be noted that the power supply pin 101 of the controller 1 provides a power supply voltage, where the power supply voltage is 5V, the sampling resistor inside the interlock port of each high-voltage load is connected in parallel to the high-voltage interlock loop, and the sampling pin 102 of the controller 1 is responsible for current sampling, so as to identify the interlock status.
Optionally, the resistance value of each of the sampling resistors is different.
As shown in fig. 1, the resistance values of the sampling resistors are different, and are respectively R1, R2, R3, R4, R5, R6, and R7 … …, the parallel loop currents can be made different by the discrete sampling resistance values provided in the interlock ports of each high-voltage load, and the currents corresponding to the sampling resistors are I1, I2, I3, I4, I5, I6, and I7 … …. The number of the sampling resistors is set according to the number of the high-voltage loads.
Illustratively, the controller 1 provides a supply voltage of 5V, and the resistance value and the loop current of each sampling resistor are shown in the following table:
| sampling resistor | Resistance value/omega | Loop Current/mA |
| R1 | 50 | 100 |
| R2 | 100 | 50 |
| R3 | 200 | 25 |
| R4 | 250 | 20 |
| R5 | 400 | 12.5 |
| R6 | 500 | 10 |
| R7 | 800 | 6.25 |
| …… | …… | …… |
According to kirchhoff current law, calculating an actual sampling current value I of the high-voltage interlocking loop, namely I1+ I2+ I3+ I4+ I5+ I6+ I7+ … …, and comparing the sampling current value I with a preset sampling current value to judge whether all the interlocking ports of the high-voltage load are in a loop, wherein the preset sampling current value is calculated according to calibration and is the sum of currents of all loops in the table. When an interlocking port of one high-voltage load fails, a fault point can be quickly positioned through a difference value between the sampling current value I and a preset sampling current value. For example, when the sampling current value I is 123.75+ … … mA and is different from the preset sampling current value by 100mA, it can be immediately determined that the loop in which the sampling resistor R1 is located is open, and then the corresponding interlock port of the high-voltage load fails.
As shown in fig. 2, an embodiment of the present invention further provides a method for detecting a high-voltage interlock circuit, which is applied to any one of the above high-voltage interlock circuits, and includes:
in the embodiment of the invention, according to the scheme of sampling parallel resistance type on the high-voltage interlocking loop, the sampling resistor is arranged in the interlocking port of each high-voltage load, each sampling resistor is connected in parallel to the high-voltage interlocking loop, and the controller is used for collecting the sampling current value of the sampling resistor and identifying the interlocking state.
in the embodiment of the invention, the preset sampling current value is calculated according to calibration, and the sampling current value is an actual sampling current value on the high-voltage interlocking loop.
in the embodiment of the invention, whether a fault occurs on the high-voltage interlocking loop can be quickly confirmed by adopting simple mathematical comparison.
And 204, when the high-voltage interlocking loop breaks down, confirming the target high-voltage load which breaks down according to the comparison result and the preset current value of each sampling resistor.
According to the embodiment of the invention, the sampling current value acquired by the controller is obtained; obtaining a comparison result of the sampling current value and a preset sampling current value; according to the comparison result, whether the high-voltage interlocking loop has a fault or not is confirmed; when a fault occurs on the high-voltage interlocking loop, the target high-voltage load with the fault is confirmed according to the comparison result and the preset current value of each sampling resistor, under the condition that a hardware port of the controller is not increased, the high-voltage load with the fault on the high-voltage interlocking loop can be quickly identified by adopting a parallel structure and collecting the current of the sampling resistors, so that effective high-voltage protection is performed, and the user experience is improved.
Optionally, the method further comprises:
and performing high-voltage protection according to the target high-voltage load.
It should be noted that the detection method of the high-voltage interlock loop can provide different high-voltage protection according to different high-voltage loads, make reasonable control and protection actions, and improve user experience.
Optionally, when the target high-voltage load is at least one of the following, controlling an instrument of the electric vehicle to display an alarm signal to perform high-voltage protection:
the device comprises an air conditioner, a compressor, a charger, a slow charging interface and a fast charging interface.
It should be noted that the target high-voltage load is a high-voltage load that does not affect driving safety, and when an interlocking port of the target high-voltage load that does not affect driving safety fails, the control instrument displays an alarm signal, where the alarm signal may be an audible and visual alarm signal to remind a user to perform high-voltage maintenance in time to protect high voltage.
Optionally, when the target high-voltage load is at least one of the following, controlling an instrument of the electric vehicle to display an alarm signal and turn off a comfort load, and performing high-voltage protection:
the device comprises a direct-current power supply converter, a high-voltage power integrated unit, a maintenance switch and a steering motor.
It should be noted that, when the interlock port of the target high-voltage load fails, the electric vehicle is in a non-dangerous mode, but may cause adverse effects of the electric vehicle, and at this time, the comfort load needs to be closed and the electric vehicle enters the limited power driving mode on the basis of controlling the instrument display alarm signal of the electric vehicle. For example, when the dc power converter fails, a high-voltage loop where the dc power converter is located is opened, so as to prevent the power loss of the battery, a comfortable load needs to be closed, the remaining time of the battery is prolonged as much as possible, and a user can maintain the electric vehicle at a nearby maintenance site.
Optionally, when the target high-voltage load is at least one of the following, controlling an instrument of the electric vehicle to display an alarm signal, turning off a comfort load, and turning off the high-voltage power, so as to perform high-voltage protection:
the brake device comprises a motor controller, a motor, a battery anode, a battery cathode and a brake motor.
It should be noted that, when the interlock port of the target high-voltage load fails, the electric vehicle is in a dangerous mode, at this time, the electric vehicle needs to be controlled to disconnect the high voltage outside the control strategy, and if the high voltage is powered on, the high-voltage loop should be cut off in time to ensure the safety of personnel.
Optionally, in step 201, obtaining a sampled current value collected by the controller includes:
acquiring the current of each sampling resistor acquired by the controller;
and obtaining the sampling current value acquired by the controller as the sum of the currents of each sampling resistor according to the kirchhoff current law.
It should be noted that, according to kirchhoff's current law, the actual sampled current value on the high-voltage interlock loop is calculated to be equal to the sum of the currents of each sampling resistor.
Optionally, step 203, confirming whether a fault occurs on the high-voltage interlock circuit according to the comparison result, includes:
when the comparison result is that the sampling current value is equal to a preset sampling current value, determining that no fault occurs on the high-voltage interlocking loop;
and when the comparison result shows that the sampling current value is smaller than the preset sampling current value, confirming that a fault occurs on the high-voltage interlocking loop.
It should be noted that, by comparing the sampled current value with a preset sampled current value, it can be determined whether all the interlock ports of the high-voltage load are in a loop, where the preset sampled current value is calculated according to calibration and is the sum of currents of the sampling resistors preset on each high-voltage loop.
Optionally, in step 204, when a fault occurs in the high-voltage interlock loop, determining a target high-voltage load with the fault according to the comparison result and the preset current value of each sampling resistor, including:
according to the comparison result, confirming the difference value of the sampling current value and the preset sampling current value;
and selecting the sampling resistor equal to the difference value from the preset current values of all the sampling resistors as a target sampling resistor, and confirming that the target high-voltage load corresponding to the target sampling resistor has a fault.
It should be noted that, when an interlock port of a certain high-voltage load fails, a target sampling resistor with a fault can be quickly determined according to a difference value between the sampling current value and a preset sampling current value, and then the interlock port of the corresponding high-voltage load fails.
As shown in fig. 3, an embodiment of the present invention further provides a detection apparatus for a high-voltage interlock circuit, which is applied to the high-voltage interlock circuit described in any one of the above embodiments, and includes:
an obtaining module 301, configured to obtain a sampling current value acquired by the controller;
an obtaining module 302, configured to obtain a comparison result between the sampling current value and a preset sampling current value;
a first confirming module 303, configured to confirm whether a fault occurs on the high-voltage interlock circuit according to the comparison result;
and a second confirming module 304, configured to, when a fault occurs in the high-voltage interlock loop, confirm the target high-voltage load with the fault according to the comparison result and the preset current value of each sampling resistor.
According to the embodiment of the invention, the sampling current value acquired by the controller is obtained; obtaining a comparison result of the sampling current value and a preset sampling current value; according to the comparison result, whether the high-voltage interlocking loop has a fault or not is confirmed; when a fault occurs on the high-voltage interlocking loop, the target high-voltage load with the fault is confirmed according to the comparison result and the preset current value of each sampling resistor, under the condition that a hardware port of the controller is not increased, the high-voltage load with the fault on the high-voltage interlocking loop can be quickly identified by adopting a parallel structure and collecting the current of the sampling resistors, so that effective high-voltage protection is performed, and the user experience is improved.
Optionally, the apparatus further comprises:
and the protection module is used for performing high-voltage protection according to the target high-voltage load.
Optionally, when the target high-voltage load is at least one of the following, controlling an instrument of the electric vehicle to display an alarm signal to perform high-voltage protection:
the device comprises an air conditioner, a compressor, a charger, a slow charging interface and a fast charging interface.
Optionally, when the target high-voltage load is at least one of the following, controlling an instrument of the electric vehicle to display an alarm signal and turn off a comfort load, and performing high-voltage protection:
the device comprises a direct-current power supply converter, a high-voltage power integrated unit, a maintenance switch and a steering motor.
Optionally, when the target high-voltage load is at least one of the following, controlling an instrument of the electric vehicle to display an alarm signal, turning off a comfort load, and turning off the high-voltage power, so as to perform high-voltage protection:
the brake device comprises a motor controller, a motor, a battery anode, a battery cathode and a brake motor.
Optionally, the obtaining module 301 is specifically configured to:
acquiring the current of each sampling resistor acquired by the controller;
and obtaining the sampling current value acquired by the controller as the sum of the currents of each sampling resistor according to the kirchhoff current law.
Optionally, the first confirming module 303 is specifically configured to:
when the comparison result is that the sampling current value is equal to a preset sampling current value, determining that no fault occurs on the high-voltage interlocking loop;
and when the comparison result shows that the sampling current value is smaller than the preset sampling current value, confirming that a fault occurs on the high-voltage interlocking loop.
Optionally, the second confirmation module 304 is specifically configured to:
according to the comparison result, confirming the difference value of the sampling current value and the preset sampling current value;
and selecting the sampling resistor equal to the difference value from the preset current values of all the sampling resistors as a target sampling resistor, and confirming that the target high-voltage load corresponding to the target sampling resistor has a fault.
The embodiment of the invention also provides an electric automobile which comprises the high-voltage interlocking circuit and the detection device of the high-voltage interlocking circuit.
The electric vehicle provided by the embodiment of the invention comprises the high-voltage interlocking circuit and the detection device of the high-voltage interlocking circuit, and all embodiments of the detection devices of the high-voltage interlocking circuit and the high-voltage interlocking circuit are suitable for the electric vehicle and can achieve the same or similar beneficial effects, and the description is omitted.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (13)
1. A high-voltage interlocking loop is applied to an electric automobile and is characterized by comprising: a controller and a plurality of high voltage loads;
a sampling resistor is arranged in each interlocking port of the high-voltage load;
each sampling resistor is respectively connected in parallel with two ends of the controller;
the controller is used for supplying power to the sampling resistor and collecting the current of the sampling resistor.
2. The high-voltage interlock loop according to claim 1, wherein a power supply pin of the controller is connected to one end of each of the sampling resistors, and a sampling pin of the controller is connected to the other end of each of the sampling resistors.
3. The high voltage interlock loop of claim 1, wherein each of said sampling resistors has a resistance value that is unequal.
4. A method for detecting a high-voltage interlock circuit, applied to the high-voltage interlock circuit according to any one of claims 1 to 3, comprising:
acquiring a sampling current value acquired by the controller;
obtaining a comparison result of the sampling current value and a preset sampling current value;
according to the comparison result, whether the high-voltage interlocking loop has a fault or not is confirmed;
and when the high-voltage interlocking loop breaks down, confirming the target high-voltage load which breaks down according to the comparison result and the preset current value of each sampling resistor.
5. The method for detecting a high-voltage interlock loop according to claim 4, further comprising:
and performing high-voltage protection according to the target high-voltage load.
6. The method for detecting the high-voltage interlocking loop according to claim 5, characterized in that when the target high-voltage load is at least one of the following loads, the method controls an instrument of the electric automobile to display an alarm signal to perform high-voltage protection:
the device comprises an air conditioner, a compressor, a charger, a slow charging interface and a fast charging interface.
7. The method for detecting the high-voltage interlocking loop according to claim 5, wherein when the target high-voltage load is at least one of the following, controlling an instrument of the electric automobile to display an alarm signal and close a comfortable load to perform high-voltage protection:
the device comprises a direct-current power supply converter, a high-voltage power integrated unit, a maintenance switch and a steering motor.
8. The method for detecting the high-voltage interlock loop according to claim 5, wherein when the target high-voltage load is at least one of the following, the method controls an instrument of the electric vehicle to display an alarm signal, close a comfort load and disconnect a high-voltage power so as to perform high-voltage protection:
the brake device comprises a motor controller, a motor, a battery anode, a battery cathode and a brake motor.
9. The method for detecting the high-voltage interlock loop according to claim 4, wherein obtaining the sampled current value collected by the controller comprises:
acquiring the current of each sampling resistor acquired by the controller;
and obtaining the sampling current value acquired by the controller as the sum of the currents of each sampling resistor according to the kirchhoff current law.
10. The method for detecting a high-voltage interlock loop according to claim 4, wherein the step of determining whether a fault occurs in the high-voltage interlock loop according to the comparison result comprises:
when the comparison result is that the sampling current value is equal to a preset sampling current value, determining that no fault occurs on the high-voltage interlocking loop;
and when the comparison result shows that the sampling current value is smaller than the preset sampling current value, confirming that a fault occurs on the high-voltage interlocking loop.
11. The method for detecting the high-voltage interlocking loop according to claim 4, wherein when a fault occurs on the high-voltage interlocking loop, the step of confirming the target high-voltage load with the fault according to the comparison result and the preset current value of each sampling resistor comprises the following steps:
according to the comparison result, confirming the difference value of the sampling current value and the preset sampling current value;
and selecting the sampling resistor equal to the difference value from the preset current values of all the sampling resistors as a target sampling resistor, and confirming that the target high-voltage load corresponding to the target sampling resistor has a fault.
12. A detection device for a high-voltage interlock circuit, applied to the high-voltage interlock circuit according to any one of claims 1 to 3, comprising:
the acquisition module is used for acquiring the sampling current value acquired by the controller;
the acquisition module is used for acquiring a comparison result of the sampling current value and a preset sampling current value;
the first confirming module is used for confirming whether a fault occurs on the high-voltage interlocking loop or not according to the comparison result;
and the second confirming module is used for confirming the target high-voltage load with faults according to the comparison result and the preset current value of each sampling resistor when the high-voltage interlocking loop has faults.
13. An electric vehicle characterized by comprising the high-voltage interlock circuit according to any one of claims 1 to 3 and the detection device of the high-voltage interlock circuit according to claim 12.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115447388A (en) * | 2022-08-22 | 2022-12-09 | 浙江氢途科技有限公司 | High-voltage interlocking device capable of achieving accurate positioning and judgment method |
| WO2023216362A1 (en) * | 2022-05-11 | 2023-11-16 | 上海辰竹仪表有限公司 | Hart circuit and state determination method for field interface thereof |
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| CN115447388A (en) * | 2022-08-22 | 2022-12-09 | 浙江氢途科技有限公司 | High-voltage interlocking device capable of achieving accurate positioning and judgment method |
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