CN111469669A - High-voltage interlocking detection system and method and electric vehicle - Google Patents
High-voltage interlocking detection system and method and electric vehicle Download PDFInfo
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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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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Abstract
The invention discloses a high-voltage interlocking detection system and method and an electric vehicle. The system is applied to the electric vehicle and comprises: the high-voltage component, the high-voltage connector, the high-voltage interlocking detection module and the whole vehicle control unit; the high-voltage interlocking detection modules correspond to the high-voltage components one to one; the high-voltage component comprises a high-voltage interlocking detection input port and a high-voltage interlocking detection output port; the high-voltage connector is used for electrically connecting the two high-voltage components; the high-voltage interlocking detection module comprises a low-voltage signal source and a detection unit, the low-voltage signal source is electrically connected with the high-voltage interlocking detection input port, the input end of the detection unit is electrically connected with the high-voltage interlocking detection output port, and the output end of the detection unit is electrically connected with the vehicle control unit; the detection unit is used for detecting whether the connection of the corresponding high-voltage component is normal or not and generating a corresponding detection result; and the whole vehicle control unit is used for judging whether the electric vehicle is powered off or not according to the detection result. The system can rapidly check the high-voltage interlocking fault points and improve the maintenance rate.
Description
Technical Field
The embodiment of the invention relates to the technical field of electric vehicles, in particular to a high-voltage interlocking detection system and method and an electric vehicle.
Background
With the continuous popularization of electric vehicles, High Voltage safety is more and more subjected to the chime of the society, the state issues the requirement of GB/T18384.3 part 3 of the safety requirement of electric vehicles, namely person electric shock protection, and the person electric shock protection of circuits above class B Voltage in the electric vehicles comprises (1) a basic protection method for preventing direct contact with a charged part, (2) a protection method under the condition of single point failure, and the electric vehicles are required to be provided with a High Voltage Interlock L oop (HVI L) function.
At present, high-voltage interlocking is realized by integrating a high-voltage interlocking detection circuit through a Battery Management System (BMS), a low-voltage loop is connected with high-voltage parts of a vehicle in series to realize a high-voltage interlocking function, when the vehicle reports a high-voltage interlocking fault, the fault point of the high-voltage interlocking cannot be rapidly checked, so that the problems of low maintenance efficiency and difficult maintenance of the electric vehicle are caused, and the probability of false reporting and error reporting is improved because the high-voltage interlocking loop is longer.
Disclosure of Invention
The invention provides a high-voltage interlocking detection system and method and an electric vehicle, which are used for rapidly checking fault points of high-voltage interlocking, improving the maintenance rate and reducing the false alarm and false alarm rate.
In a first aspect, an embodiment of the present invention provides a high-voltage interlock detection system, which is applied to an electric vehicle, and includes:
the system comprises a plurality of high-voltage components, a plurality of high-voltage connectors, a plurality of high-voltage interlocking detection modules and a whole vehicle control unit; the high-voltage interlocking detection modules correspond to the high-voltage components one to one;
the high-voltage component comprises a high-voltage interlocking detection input port and a high-voltage interlocking detection output port;
the high-voltage connector is used for electrically connecting two high-voltage components;
the high-voltage interlocking detection module comprises a low-voltage signal source and a detection unit, the low-voltage signal source is electrically connected with the high-voltage interlocking detection input port, the input end of the detection unit is electrically connected with the high-voltage interlocking detection output port, and the output end of the detection unit is electrically connected with the whole vehicle control unit;
the detection unit is used for detecting whether the connection of the corresponding high-voltage component is normal or not according to whether the high-voltage interlocking signal is received or not and generating a corresponding detection result;
and the whole vehicle control unit is used for receiving the detection result and judging whether the electric vehicle is powered off or not according to the detection result.
Optionally, the determining whether the electric vehicle is powered off according to the detection result includes:
the whole vehicle control unit judges the whole vehicle state of the electric vehicle;
if the electric vehicle is in a charging state and the high-voltage component fails, the whole vehicle control unit controls the electric vehicle to exit the charging state and perform power-off processing on the electric vehicle;
if the electric vehicle is in a running state and the high-voltage component is in fault, the whole vehicle control unit controls the vehicle to run at a limited speed or controls the vehicle to run at a reduced speed, and power-off prompt is carried out;
if the electric vehicle is in a state before the high-voltage electrification and the high-voltage component is in fault, the whole vehicle control unit limits the electrification operation of the electric vehicle;
and if the electric vehicle is powered on at a static high voltage and the high-voltage component is in fault, the whole vehicle control unit is used for powering off the electric vehicle.
Optionally, a plurality of the high voltage components comprises at least: a first high voltage component and a second high voltage component electrically connected by the high voltage connector;
the first high-voltage component corresponds to a first high-voltage interlocking detection module, and the second high-voltage component corresponds to a second high-voltage interlocking detection module; the first high-voltage interlocking detection module comprises a first low-voltage signal source and a first detection unit, and the second high-voltage interlocking detection module comprises a second low-voltage signal source and a second detection unit;
the high-voltage interlocking detection input port of the first component high voltage is electrically connected with the first low-voltage signal source, and the high-voltage interlocking detection output port of the second high-voltage component is electrically connected with the input end of the second detection unit;
the second detection unit is used for detecting whether the connection between the second high-voltage component and the first high-voltage component is normal or not and generating a corresponding detection result.
Optionally, a plurality of the high voltage components further comprise: a third high voltage component electrically connected to the second high voltage component through the high voltage connector;
the third high-voltage component corresponds to a third high-voltage interlocking detection module; the third high-voltage interlocking detection module comprises a third low-voltage signal source and a third detection unit;
the high-voltage interlocking detection input port of the third high-voltage component is electrically connected with the low-voltage signal source;
the second detection unit is further used for detecting whether the connection between the second high-voltage component and the third high-voltage component is normal or not and generating a corresponding detection result.
Optionally, a plurality of the high-voltage components are at least two of a battery pack high-voltage electric heater, a passenger compartment high-voltage electric heater, a motor controller, an electric compression controller, a three-in-one module and a battery management system.
Optionally, the high-voltage interlock detection module sends the detection result to the vehicle control unit in a CAN message manner.
Optionally, the low-voltage signal source is a PWM signal source.
In a second aspect, an embodiment of the present invention provides a high-voltage interlock detection method, which is applicable to any one of the high-voltage interlock detection systems provided in the first aspect, where the high-voltage interlock detection system includes: the system comprises a plurality of high-voltage components, a plurality of high-voltage connectors, a plurality of high-voltage interlocking detection modules and a whole vehicle control unit; the high-voltage interlocking detection modules correspond to the high-voltage components one to one;
the high-voltage component comprises a high-voltage interlocking detection input port and a high-voltage interlocking detection output port;
the high-voltage connector is used for electrically connecting two high-voltage components;
the high-voltage interlocking detection module comprises a low-voltage signal source and a detection unit, the low-voltage signal source is electrically connected with the high-voltage interlocking detection input port, the input end of the detection unit is electrically connected with the high-voltage interlocking detection output port, and the output end of the detection unit is electrically connected with the whole vehicle control unit;
the high-voltage interlock detection method comprises the following steps:
the detection unit detects whether the connection of the corresponding high-voltage component is normal according to whether the high-voltage interlocking signal is received or not, and generates a corresponding detection result;
and the whole vehicle control unit receives the detection result and judges whether the electric vehicle is powered off or not according to the detection result.
Optionally, the determining whether the electric vehicle is powered off according to the detection result includes:
the whole vehicle control unit judges the whole vehicle state of the electric vehicle;
if the electric vehicle is in a charging state and the high-voltage component fails, the whole vehicle control unit controls the electric vehicle to exit the charging state and perform power-off processing on the electric vehicle;
if the electric vehicle is in a running state and the high-voltage component is in fault, the whole vehicle control unit controls the vehicle to run at a limited speed or controls the vehicle to run at a reduced speed, and power-off prompt is carried out;
if the electric vehicle is in a state before the high-voltage electrification and the high-voltage component is in fault, the whole vehicle control unit limits the electrification operation of the electric vehicle;
and if the electric vehicle is powered on at a static high voltage and the high-voltage component is in fault, the whole vehicle control unit is used for powering off the electric vehicle.
In a third aspect, an embodiment of the present invention provides an electric vehicle, including any one of the high-voltage interlock detection systems provided in the first aspect.
According to the technical scheme provided by the embodiment of the invention, the high-voltage interlocking detection module and the plurality of high-voltage components are arranged in a one-to-one correspondence manner, the high-voltage connector is electrically connected with the two high-voltage components, a low-voltage signal source of the high-voltage interlocking detection module is electrically connected with a high-voltage interlocking detection input port of the high-voltage components, the input end of a detection unit of the high-voltage interlocking detection module is electrically connected with a high-voltage interlocking detection output port of the high-voltage components, and the output end of the; when the two high-voltage components are normally and electrically connected, the detection unit corresponding to one high-voltage component can detect a high-voltage interlocking signal sent by a low-voltage signal source corresponding to the other high-voltage component, and when the two high-voltage components are not normally and electrically connected, the detection unit corresponding to one high-voltage component cannot detect a high-voltage interlocking signal sent by a low-voltage signal source corresponding to the other high-voltage component, so that the detection unit can detect whether the high-voltage components corresponding to the detection unit are normally and electrically connected according to whether the high-voltage interlocking signal is received or not and generate a corresponding detection result, and the whole vehicle control unit judges whether the electric vehicle is powered off or not according to the detection result after receiving the detection. The high-voltage interlocking detection modules correspond to the high-voltage components one to one and send detection results to the whole vehicle control unit, namely, the high-voltage interlocking detection loops of the high-voltage components are arranged in parallel, so that the whole vehicle control unit can receive the high-voltage interlocking detection results of the high-voltage components, fault points of high-voltage interlocking can be rapidly checked according to the detection results, and the maintenance rate is improved; in addition, the number of high-voltage components electrically connected in each high-voltage interlocking detection loop is small, namely, each high-voltage interlocking detection loop is short, so that false alarm and false report caused by the long high-voltage interlocking detection loop can be avoided, and the false alarm rate and the false report rate are improved.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, a brief description is given below of the drawings used in describing the embodiments. It should be clear that the described figures are only views of some of the embodiments of the invention to be described, not all, and that for a person skilled in the art, other figures can be derived from these figures without inventive effort.
Fig. 1 is a schematic structural diagram of a high-voltage interlock detection system according to an embodiment of the present invention;
fig. 2 is a schematic view of a work flow of a vehicle control unit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a high-voltage circuit according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a high-voltage interlock detection method according to an embodiment of the present invention;
FIG. 5 is a schematic flow chart of another high-voltage interlock detection method according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electric vehicle according to an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures.
The embodiment of the invention provides a high-voltage interlocking detection system which is applied to an electric vehicle. Fig. 1 is a schematic structural diagram of a high-voltage interlock detection system according to an embodiment of the present invention. As shown in fig. 1, the high-voltage interlock detection system 100 includes: a plurality of high voltage components 110, a plurality of high voltage connectors 120, a plurality of high voltage interlock detection modules 130, and a vehicle control unit 140; the plurality of high voltage interlock detection modules 130 correspond one-to-one to the plurality of high voltage components 110.
Wherein the high voltage component 110 includes a high voltage interlock detection input port J1 and a high voltage interlock detection output port J12; the high voltage connector 120 is used to electrically connect two high voltage components 110; the high-voltage interlock detection module 130 comprises a low-voltage signal source 131 and a detection unit 132, the low-voltage signal source 131 is electrically connected with a high-voltage interlock detection input port J1, an input end of the detection unit 132 is electrically connected with a high-voltage interlock detection output port J2, and an output end of the detection unit 132 is electrically connected with the vehicle control unit 140.
The detecting unit 132 is used for detecting whether the connection of the corresponding high-voltage component 110 is normal according to whether the high-voltage interlock signal is received, and generating a corresponding detection result.
The vehicle control unit 140 is configured to receive the detection result and determine whether the electric vehicle is powered off according to the detection result.
Illustratively, as shown in fig. 1, the plurality of high voltage components 110 includes at least a first high voltage component 1101 and a second high voltage component 1102, the first high voltage component 1101 and the second high voltage component 1102 being electrically connected by a high voltage connector 120; wherein the first high voltage component 1101 corresponds to the first high voltage interlock detection module 1301 and the second high voltage component 1102 corresponds to the second high voltage interlock detection module 1302. The first high-voltage interlock detection module 1301 includes a first low-voltage signal source 1311 and a first detection unit 1321, the second high-voltage interlock detection module 1302 includes a second low-voltage signal source 1312 and a second detection unit 1322, the high-voltage interlock detection input port J1 of the first high-voltage component 1101 is electrically connected with the first low-voltage signal source 1311, and the high-voltage interlock detection output port J2 of the first high-voltage component 1101 is electrically connected with an input end of the first detection unit 1321; the high-voltage interlock detection input port J1 of the second high-voltage component 1102 is electrically connected to the second low-voltage signal source 1312, the high-voltage interlock detection output port J2 of the second high-voltage component 1101 is electrically connected to the input terminal of the second detection unit 1322, and both the output terminal of the first detection unit 1321 and the output terminal of the second detection unit 1322 are electrically connected to the vehicle control unit 140. The second detecting unit 1322 is configured to detect whether the connection between the second high-voltage component 1102 and the first high-voltage component 1101 is normal, and generate a corresponding detection result, and the first detecting unit 1321 is configured to detect whether the connection between the first high-voltage component 1101 and the second high-voltage component 1102 is normal, and generate a corresponding detection result.
Specifically, when the first high voltage component 1101 is normally electrically connected to the second high voltage component 1102, the high voltage interlock detection input port J1 of the first high voltage component 1101 is electrically connected with the high voltage interlock detection input output port J2 of the second high voltage component 1102, and/or the high voltage interlock detection output port J2 of the first high voltage component 1101 is electrically connected with the high voltage interlock detection input port J1 of the second high voltage component 1102, therefore, the high-voltage interlock signal outputted by the first low-voltage signal source 1311 can be transmitted to the high-voltage interlock detection input/output port J2 of the second high-voltage component 1102, the second detection unit 1322 detects the high-voltage interlock signal and generates a corresponding detection result, the high-voltage interlock signal outputted by the second low-voltage signal source 1312 can be transmitted to the high-voltage interlock detection input/output port J2 of the first high-voltage component 1101, and the first detection unit 1321 detects the high-voltage interlock signal and generates a corresponding detection result; when the first high voltage component 1101 and the second high voltage component 1102 are not normally electrically connected, the high voltage interlock detection input port J1 of the first high voltage component 1101 is disconnected from the high voltage interlock detection input port J2 of the second high voltage component 1102, and/or the high voltage interlock detection output port J2 of the first high voltage component 1101 is disconnected from the high voltage interlock detection input port J1 of the second high voltage component 1102, therefore, the high-voltage interlock signal outputted from the first low-voltage signal source 1311 cannot be transmitted to the high-voltage interlock detection input/output port J2 of the second high-voltage component 1102, the second detection unit 1322 cannot detect the high-voltage interlock signal and generate a corresponding detection result, the high-voltage interlock signal outputted from the second low-voltage signal source 1312 cannot be transmitted to the high-voltage interlock detection input/output port J2 of the first high-voltage component 1101, and the first detection unit 1321 cannot detect the high-voltage interlock signal and generate a corresponding detection result. In summary, the first detecting unit 1321 can detect whether the first high voltage component 1101 and the second high voltage component 1102 are normally electrically connected and generate a corresponding detection result according to whether the high voltage interlock signal sent by the second low voltage signal source 1312 is received, and the second detecting unit 1322 can detect whether the second high voltage component 1102 and the first high voltage component 1101 are normally electrically connected and generate a corresponding detection result according to whether the high voltage interlock signal sent by the first low voltage signal source 1311 is received. It should be noted that fig. 1 only illustrates an exemplary high-voltage interlock detection system including two high-voltage components, and the application is not limited to a specific number of high-voltage components.
According to the embodiment of the invention, the high-voltage interlocking detection modules correspond to the high-voltage components one to one, and the detection unit can detect whether the high-voltage components corresponding to the detection unit are normally electrically connected according to whether the high-voltage interlocking signals are received or not and generate corresponding detection results, namely, the high-voltage interlocking detection loops of each high-voltage component are arranged in parallel, so that the whole vehicle control unit can receive the high-voltage interlocking detection results of each high-voltage component, fault points of high-voltage interlocking can be rapidly checked according to the detection results, and the maintenance rate is improved; in addition, the number of high-voltage components electrically connected in each high-voltage interlocking detection loop is small, namely each high-voltage interlocking detection loop is short, so that false alarm and false report caused by the long high-voltage interlocking detection loop can be avoided, and the false alarm rate and the false report rate are improved.
Optionally, fig. 2 is a schematic diagram of a work flow of a vehicle control unit according to an embodiment of the present invention, as shown in fig. 2. The work flow of the whole vehicle control unit specifically comprises the following steps:
s110, judging the whole vehicle state of the electric vehicle; if the electric vehicle is in a charging state, executing S121, if the electric vehicle is in a driving state, executing S122, if the electric vehicle is in a static high voltage power-on state, executing S123, and if the electric vehicle is in the static high voltage power-on state, executing S124.
And S121, when the high-voltage component breaks down, controlling the electric vehicle to exit from a charging state and powering off the electric vehicle.
Specifically, the charging state refers to a state that a charging pile charges a storage battery of the electric vehicle, the whole vehicle is in a high-voltage state at the moment, if the high-voltage components are not normally electrically connected, the charging state should be immediately quitted, the output request to the charging pile is stopped, the electrical connection of all the high-voltage components of the whole vehicle is cut off, and the power-off processing is carried out.
And S122, when the high-voltage component has a fault, controlling the vehicle to run at a limited speed or controlling the vehicle to run at a reduced speed, and performing power-off prompt.
Specifically, the driving state refers to a state in which the electric vehicle is driving, and if the high-voltage component is not normally electrically connected, the driving speed of the electric vehicle is reduced or the maximum driving speed of the electric vehicle is limited, but the electric vehicle is still in the driving state, and meanwhile, a driver is prompted to stop driving of the vehicle as soon as possible through modes such as instrument prompting, voice prompting and the like, and a fault point is maintained. It should be noted that, before the maintenance of the fault point, the vehicle is not allowed to be powered on in the next cycle, and the electric vehicle can not be used normally until the maintenance is completed.
S123, when the high-voltage component is in fault, limiting the power-on operation of the electric vehicle;
and S124, when the high-voltage component has a fault, powering down the electric vehicle.
Specifically, static high-voltage electrification refers to a process that an electric vehicle starts the electric vehicle through a storage battery of the electric vehicle, and the electric vehicle is positioned before the static high-voltage electrification, specifically before the electric vehicle starts, and if the situation that high-voltage components are not normally electrically connected occurs, the electric vehicle is not allowed to be electrified; after the electric vehicle is electrified at a static high voltage, the electric vehicle is electrified but does not run, if the situation that the high-voltage components are not normally electrically connected suddenly occurs, the electric vehicle is immediately electrified, then the motor is requested to actively discharge, the electric quantity is rapidly released for the high-voltage components, and high-voltage electric shock is prevented.
According to the embodiment of the invention, the whole vehicle control unit provides the coping method when the high-voltage component is not normally electrically connected by combining the whole vehicle state of the electric vehicle, and can provide a more reasonable and safer coping mode according to the actual situation, so that the safety can be ensured and the practicability can be improved.
Optionally, with continued reference to fig. 1, the plurality of high voltage components 110 further includes a third high voltage component 1103, and the third high voltage component 1103 is electrically connected to the second high voltage component 1102 by the high voltage connector 120.
Wherein the third high voltage component 1103 corresponds to the third high voltage interlock detection module 1303; the third high-voltage interlock detection module 1303 includes a third low-voltage signal source 1313 and a third detection unit 1323; the second detecting unit 1322 is further configured to detect whether the connection between the second high voltage component 1102 and the third high voltage component 1103 is normal, and generate a corresponding detection result.
Specifically, the third high voltage component 1103 is electrically connected with the second high voltage component 1102 through the second high voltage connector 1202, the first high voltage component 1101 is electrically connected with the second high voltage component 1102 through the first high voltage connector 1201, that is, the second high voltage component 1102 is electrically connected with both the first high voltage component 1101 and the third high voltage component 1103, that is, the second detection unit 1322 detects whether the connection between the second high voltage component 1102 and the first high voltage component 1101 is normal or not, and detects whether the connection between the second high voltage component 1102 and the third high voltage component 1103 is normal or not, so that the second detection unit 1322 generates four detection results, which are exemplarily, the fourth detection result of the second detection unit 1322 may be 1102_ HVI L _ status:0X0, 1102_ HVI L: 0X1, 1102_ HVI L _ 1101 status:0X0, 1102_ i L _ status:0X1, wherein 1102_ HVI 731 _ HVI _ 1102_ 9 _ status: 1103 indicates that the second high voltage component 1102 is electrically connected with the second high voltage component 1102_ HVI 460: 0, 1102_ HVI _ status: 1102_ status: 0: 1102_ status: 0: 821102 is not normally connected with the third high voltage component 1102_ status 1102_ 1102.
Optionally, with continued reference to fig. 1, the plurality of high voltage components 110 are at least two of a battery pack high voltage electric heater, a passenger compartment high voltage electric heater, a motor controller, an electric compression controller, a three-in-one module, and a battery management system.
For example, fig. 3 is a schematic structural diagram of a high-voltage circuit according to an embodiment of the present invention, and as shown in fig. 3, the three-in-one module 310 refers to a module including a vehicle-mounted charger function, a dc voltage conversion function, and a high-voltage power distribution function, the three-in-one module 310 is electrically connected to the battery pack high-voltage electric heater 320, the passenger compartment high-voltage electric heater 330, the electric compression controller 340, the power management system 350, and the ac charging module 360, and the power management system 350 is further electrically connected to the motor controller 370 and the dc charging module 380. Generally speaking, there is no need for high voltage interlock detection of the dc charging module 380 and the ac charging module 360. Fig. 3 illustrates only a high-voltage circuit in an electric vehicle, and the embodiment of the present invention does not limit a specific structure of the high-voltage circuit.
It should be noted that the first high-voltage component and the second high-voltage component in the embodiment of the present application indicate two high-voltage components electrically connected to each other, the first high-voltage component and the third high-voltage component indicate two high-voltage components insulated from each other, the second high-voltage component indicates a high-voltage component capable of being electrically connected to a plurality of high-voltage components, and each of the first high-voltage component and the third high-voltage component indicates a high-voltage component capable of being electrically connected to only one high-voltage component. Illustratively, as shown in fig. 3, the triad module 310 and the power management system 350 may be understood as the second high voltage component, and the battery pack high voltage electric heater 320, the passenger compartment high voltage electric heater 330, the electric compression controller 340, the ac charging module 360, the motor controller 370, and the dc charging module 380 may be understood as the first high voltage component and/or the third high voltage component in the above-described embodiments.
Optionally, with reference to fig. 1, the high-voltage interlock detection module 130 sends the detection result to the vehicle control unit 140 in a CAN message manner. Specifically, the high-voltage interlock detection module 130 is connected to the vehicle control unit 140 through a CAN bus, and a detection result generated by each high-voltage interlock detection module 130 is transmitted to the vehicle control unit 140 through the CAN bus. It should be noted that the high-voltage interlock detection module and the vehicle control unit can also communicate with each other in other manners, and the present application is not particularly limited.
Optionally, with continued reference to fig. 1, the low voltage signal source 131 is a PWM signal source.
Illustratively, the Pulse frequency output by the output end of a Pulse Width Modulation (PWM) signal source is 100Hz, the duty ratio is 50%, the frequency precision of the Pulse sent by the PWM signal source is greater than ± 2%, and the duty ratio precision is greater than ± 2%. Referring to fig. 1, after the high voltage component 110 is woken up, if the frequency of the pulse signal received by the second detection unit 1322 is f, the duty ratio is R, the frequency of the pulse sent by the first low voltage signal source 1311 is f1, and the duty ratio is R1, which satisfies 0.9f1 ≤ f ≤ 1.1f1 and 0.9R1 ≤ R ≤ 1.1R1, it is determined that the second detection unit 1322 receives the high voltage interlock signal sent by the first low voltage signal source 1311, i.e., the second high voltage component 1102 is normally electrically connected to the first high voltage component 1101; if the second detecting unit 1322 does not receive the pulse with the pulse frequency f and the duty ratio R satisfying 0.9f1 ≦ f ≦ 1.1f1 and 0.9R1 ≦ R ≦ 1.1R1, or does not receive any pulse signal within 100ms, it is determined that the second detecting unit 1322 does not receive the high-voltage interlock signal transmitted by the first low-voltage signal source 1311, i.e., the second high-voltage component 1102 is not normally electrically connected to the first high-voltage component 1101. Note that the period of the pulse received by the second detection unit 1322 is 30 ms. The parameters provided by the embodiment of the invention are all exemplified, and in practical application, corresponding parameters are set according to requirements.
Based on the same inventive concept, the embodiment of the invention also provides a high-voltage interlocking detection method which is suitable for the high-voltage interlocking detection system provided by any embodiment of the invention and has corresponding functions and beneficial effects of the system.
Fig. 4 is a schematic flow chart of a high-voltage interlock detection method according to an embodiment of the present invention, where the method is applicable to any one of the high-voltage interlock detection systems 100 provided in the embodiments, and the high-voltage interlock detection system 100 is shown in fig. 1, and includes: the high voltage interlock detection system 100 includes: a plurality of high voltage components 110, a plurality of high voltage connectors 120, a plurality of high voltage interlock detection modules 130, and a vehicle control unit 140; the plurality of high voltage interlock detection modules 130 correspond one-to-one to the plurality of high voltage components 110.
Wherein the high voltage component 110 includes a high voltage interlock detection input port J1 and a high voltage interlock detection output port J12; the high voltage connector 120 is used to electrically connect two high voltage components 110; the high-voltage interlock detection module 130 comprises a low-voltage signal source 131 and a detection unit 132, the low-voltage signal source 131 is electrically connected with a high-voltage interlock detection input port J1, an input end of the detection unit 132 is electrically connected with a high-voltage interlock detection output port J2, and an output end of the detection unit 132 is electrically connected with the vehicle control unit 140.
As shown in fig. 4, the high-voltage interlock detection method specifically includes the steps of:
s410, the detection unit detects whether the connection of the corresponding high-voltage component is normal according to whether the high-voltage interlocking signal is received or not, and generates a corresponding detection result;
and S420, the whole vehicle control unit receives the detection result and judges whether the electric vehicle is powered off or not according to the detection result.
According to the embodiment of the invention, whether the high-voltage components corresponding to the detection unit are normally electrically connected can be detected through the detection unit according to whether the high-voltage interlocking signal is received or not, and a corresponding detection result is generated, namely the high-voltage interlocking detection loop of each high-voltage component is arranged in parallel, the whole vehicle control unit can receive the high-voltage interlocking detection result of each high-voltage component, the fault point of high-voltage interlocking can be rapidly checked according to the detection result, and the maintenance rate is improved.
Optionally, fig. 5 is a schematic flow chart of another high-voltage interlock detection method according to an embodiment of the present invention. As shown in fig. 5, the high-voltage interlock detection method specifically includes the steps of:
s410, the detection unit detects whether the connection of the corresponding high-voltage component is normal according to whether the high-voltage interlocking signal is received or not, and generates a corresponding detection result.
And S420, the whole vehicle control unit receives the detection result.
S430, the whole vehicle control unit judges the whole vehicle state of the electric vehicle; if the electric vehicle is in a charging state, executing S441, if the electric vehicle is in a driving state, executing S442, if the electric vehicle is in a static high voltage state, executing S443, and if the electric vehicle is in a static high voltage state, executing S444.
And S441, when the high-voltage component breaks down, the whole vehicle control unit controls the electric vehicle to exit from a charging state and to perform power-off processing on the electric vehicle.
And S442, when the high-voltage component has a fault, the whole vehicle control unit controls the vehicle to run at a limited speed or controls the vehicle to run at a reduced speed, and power-off prompt is performed.
S443, when the high-voltage component is in fault, the whole vehicle control unit limits the power-on operation of the electric vehicle.
And S444, when the high-voltage component breaks down, the whole vehicle control unit performs power-off operation on the electric vehicle.
According to the embodiment of the invention, the whole vehicle control unit provides the coping method when the high-voltage component is not normally electrically connected by combining the whole vehicle state of the electric vehicle, and can provide a more reasonable and safer coping mode according to the actual situation, so that the safety can be ensured and the practicability can be improved.
Based on the same inventive concept, the embodiment of the invention also provides an electric vehicle comprising the high-voltage interlocking detection system provided by any embodiment of the invention, and the electric vehicle has corresponding functions and beneficial effects of the system.
Fig. 6 is a schematic structural diagram of an electric vehicle according to an embodiment of the present invention, and as shown in fig. 6, an electric vehicle 200 includes any one of the high-voltage interlock detection systems according to the above embodiments.
The electric vehicle 200 provided by the embodiment of the invention has the beneficial effects of a high-voltage interlocking detection system, and the details are not repeated herein.
The foregoing is considered as illustrative of the preferred embodiments of the invention and technical principles employed. The present invention is not limited to the specific embodiments herein, and it will be apparent to those skilled in the art that various changes, rearrangements, and substitutions can be made without departing from the scope of the invention. Therefore, although the present invention has been described in more detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the claims.
Claims (10)
1. The utility model provides a high pressure interlock detecting system, is applied to in the electric motor car, its characterized in that includes: the system comprises a plurality of high-voltage components, a plurality of high-voltage connectors, a plurality of high-voltage interlocking detection modules and a whole vehicle control unit; the high-voltage interlocking detection modules correspond to the high-voltage components one to one;
the high-voltage component comprises a high-voltage interlocking detection input port and a high-voltage interlocking detection output port;
the high-voltage connector is used for electrically connecting two high-voltage components;
the high-voltage interlocking detection module comprises a low-voltage signal source and a detection unit, the low-voltage signal source is electrically connected with the high-voltage interlocking detection input port, the input end of the detection unit is electrically connected with the high-voltage interlocking detection output port, and the output end of the detection unit is electrically connected with the whole vehicle control unit;
the detection unit is used for detecting whether the connection of the corresponding high-voltage component is normal or not according to whether the high-voltage interlocking signal is received or not and generating a corresponding detection result;
and the whole vehicle control unit is used for receiving the detection result and judging whether the electric vehicle is powered off or not according to the detection result.
2. The system of claim 1, wherein the determining whether the electric vehicle is powered down according to the detection result comprises:
the whole vehicle control unit judges the whole vehicle state of the electric vehicle;
if the electric vehicle is in a charging state and the high-voltage component fails, the whole vehicle control unit controls the electric vehicle to exit the charging state and perform power-off processing on the electric vehicle;
if the electric vehicle is in a running state and the high-voltage component is in fault, the whole vehicle control unit controls the vehicle to run at a limited speed or controls the vehicle to run at a reduced speed, and power-off prompt is carried out;
if the electric vehicle is in a state before the high-voltage electrification and the high-voltage component is in fault, the whole vehicle control unit limits the electrification operation of the electric vehicle;
and if the electric vehicle is powered on at a static high voltage and the high-voltage component is in fault, the whole vehicle control unit is used for powering off the electric vehicle.
3. The high-voltage interlock detection system of claim 1 wherein said plurality of high-voltage components includes at least: a first high voltage component and a second high voltage component electrically connected by the high voltage connector;
the first high-voltage component corresponds to a first high-voltage interlocking detection module, and the second high-voltage component corresponds to a second high-voltage interlocking detection module; the first high-voltage interlocking detection module comprises a first low-voltage signal source and a first detection unit, and the second high-voltage interlocking detection module comprises a second low-voltage signal source and a second detection unit;
the high-voltage interlocking detection input port of the first high-voltage component is electrically connected with the first low-voltage signal source, and the high-voltage interlocking detection output port of the second high-voltage component is electrically connected with the input end of the second detection unit;
the second detection unit is used for detecting whether the connection between the second high-voltage component and the first high-voltage component is normal or not and generating a corresponding detection result.
4. The high-voltage interlock detection system of claim 3 wherein said plurality of high-voltage components further comprises: a third high voltage component electrically connected to the second high voltage component through the high voltage connector;
the third high-voltage component corresponds to a third high-voltage interlocking detection module; the third high-voltage interlocking detection module comprises a third low-voltage signal source and a third detection unit;
the high-voltage interlocking detection input port of the third high-voltage component is electrically connected with the third low-voltage signal source;
the second detection unit is further used for detecting whether the connection between the second high-voltage component and the third high-voltage component is normal or not and generating a corresponding detection result.
5. The high voltage interlock detection system of claim 3, wherein a plurality of said high voltage components are at least two of a battery pack high voltage electric heater, a passenger compartment high voltage electric heater, a motor controller, an electric compression controller, a three-in-one module, a battery management system.
6. The system according to claim 1, wherein the high-voltage interlock detection module sends the detection result to the vehicle control unit in a CAN message manner.
7. The high voltage interlock detection system of claim 1 wherein said low voltage signal source is a PWM signal source.
8. A high-voltage interlock detection method applied to the high-voltage interlock detection system according to any one of claims 1 to 7, wherein the high-voltage interlock detection system comprises: the system comprises a plurality of high-voltage components, a plurality of high-voltage connectors, a plurality of high-voltage interlocking detection modules and a whole vehicle control unit; the high-voltage interlocking detection modules correspond to the high-voltage components one to one;
the high-voltage component comprises a high-voltage interlocking detection input port and a high-voltage interlocking detection output port;
the high-voltage connector is used for electrically connecting two high-voltage components;
the high-voltage interlocking detection module comprises a low-voltage signal source and a detection unit, the low-voltage signal source is electrically connected with the high-voltage interlocking detection input port, the input end of the detection unit is electrically connected with the high-voltage interlocking detection output port, and the output end of the detection unit is electrically connected with the whole vehicle control unit;
the high-voltage interlock detection method comprises the following steps:
the detection unit detects whether the connection of the corresponding high-voltage component is normal according to whether the high-voltage interlocking signal is received or not, and generates a corresponding detection result;
and the whole vehicle control unit receives the detection result and judges whether the electric vehicle is powered off or not according to the detection result.
9. The method according to claim 8, wherein the determining whether the electric vehicle is powered off according to the detection result comprises:
the whole vehicle control unit judges the whole vehicle state of the electric vehicle;
if the electric vehicle is in a charging state and the high-voltage component fails, the whole vehicle control unit controls the electric vehicle to exit the charging state and perform power-off processing on the electric vehicle;
if the electric vehicle is in a running state and the high-voltage component is in fault, the whole vehicle control unit controls the vehicle to run at a limited speed or controls the vehicle to run at a reduced speed, and power-off prompt is carried out;
if the electric vehicle is in a state before the high-voltage electrification and the high-voltage component is in fault, the whole vehicle control unit limits the electrification operation of the electric vehicle;
and if the electric vehicle is powered on at a static high voltage and the high-voltage component is in fault, the whole vehicle control unit is used for powering off the electric vehicle.
10. An electric vehicle comprising the high voltage interlock detection system of any one of claims 1-7.
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