CN211402678U - High-voltage interlocking detection device and automobile - Google Patents
High-voltage interlocking detection device and automobile Download PDFInfo
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- CN211402678U CN211402678U CN201921540334.2U CN201921540334U CN211402678U CN 211402678 U CN211402678 U CN 211402678U CN 201921540334 U CN201921540334 U CN 201921540334U CN 211402678 U CN211402678 U CN 211402678U
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Abstract
The utility model provides a high pressure interlocking detection device and car relates to car technical field. The high-voltage interlocking detection device comprises a control module and a module to be detected, wherein the control module comprises a processor, a first switch unit and a second switch unit, the processor is electrically connected with the first switch unit and the second switch unit, one end of the first switch unit is electrically connected with a power supply, the other end of the first switch unit is electrically connected with one end of the module to be detected, one end of the second switch unit is grounded, and the other end of the second switch unit is electrically connected with the other end of the module to be detected; the processor is used for generating a detection signal by controlling the on-off of the first switch unit and the second switch unit, and obtaining a detection result after the detection signal flows through the module to be detected. The utility model provides a high-pressure interlocking detection device can produce reliable and stable detected signal, and practices thrift the energy consumption.
Description
Technical Field
The utility model relates to the field of automotive technology, particularly, relate to a high pressure interlocking detection device and car.
Background
Whether pure electric vehicles or hybrid electric vehicles, the electric parts of the pure electric vehicles and the hybrid electric vehicles are high-voltage systems in nature, and theoretically, the danger of high-voltage leakage exists. Therefore, high voltage monitoring of high voltage systems is important. The high-voltage interlocking scheme has the effects that the high-voltage interlocking loop and the high-voltage circuit are connected in parallel, and the problem of disconnection of a high-voltage connector and a high-voltage component in the high-voltage circuit is indirectly judged by judging the on-off condition of the high-voltage interlocking loop.
The current high-voltage interlock scheme includes a PWM (Pulse width modulation) type and a voltage type, wherein a high-voltage interlock loop of the PWM type high-voltage interlock scheme needs to send a PWM source with a fixed waveform, frequency and duty ratio, but the PWM type high-voltage interlock scheme is easily affected by electromagnetic interference, which affects the accuracy of the result. The high-voltage interlocking loop of the voltage type high-voltage interlocking scheme requires a low-voltage source to be switched on in real time, although the stability is good, the power consumption is high, and when the source voltage is reduced, the problem of misjudgment is easy to occur. There is an urgent need for a high voltage interlock solution to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high pressure interlocking detection device and car can solve above-mentioned technical problem.
The utility model provides a technical scheme:
in a first aspect, an embodiment of the present invention provides a high-voltage interlock detection device, including a control module and a module to be detected, the control module includes a processor, a first switch unit and a second switch unit, the processor is electrically connected to both the first switch unit and the second switch unit, one end of the first switch unit is electrically connected to a power supply, the other end of the first switch unit is electrically connected to one end of the module to be detected, one end of the second switch unit is grounded, and the other end of the second switch unit is electrically connected to the other end of the module to be detected; the processor is used for generating a detection signal by controlling the on-off of the first switch unit and the second switch unit, and obtaining a detection result after the detection signal flows through the module to be detected.
In an optional embodiment, the first switch unit includes a first switch tube, the second switch unit includes a second switch tube, a first pin of the first switch tube is electrically connected to the first interface of the processor, a second pin of the first switch tube is electrically connected to the power supply, a third pin of the first switch tube is electrically connected to one end of the module to be detected, a first pin of the second switch tube is electrically connected to the second interface of the processor, a second pin of the second switch tube is electrically connected to the other end of the module to be detected, and a third pin of the second switch tube is grounded; the processor is used for sending a first control signal to the first switch tube and sending a second control signal to the second switch tube, so that the first switch tube is periodically switched on and off, the second switch tube is in a conducting state, and the detection signal is generated.
In an optional embodiment, the module to be detected includes a plurality of first interlocking devices, each of the first interlocking devices includes a controller and a first interlocking device, the processor, the first switch tube, each of the first interlocking devices, and the second switch tube are sequentially electrically connected to form a detection loop, each of the first interlocking devices has a corresponding detection point on the detection loop, the controller corresponding to each of the first interlocking devices is electrically connected to the detection point, the second pin of the second switch tube is further electrically connected to the third interface of the processor, and each of the controllers is electrically connected to the processor; the controller is used for acquiring a first electric signal of the detection point and sending the first electric signal to the processor; the processor is used for determining a fault detection point according to the second electric signal of the third interface and the first electric signal, and further determining a fault first interlocking device.
In an optional embodiment, the module to be detected further includes a plurality of second interlocking devices, each of the second interlocking devices includes a second interlocking device, and the processor, the first switch tube, each of the first interlocking devices, each of the second interlocking devices, and the second switch tube are electrically connected in sequence to form a detection loop; the processor is used for determining a fault detection point according to the second electric signal of the third interface and the first electric signal, and further determining that the fault first interlocking device and/or the fault second interlocking device are/is located between the first detection point and the second detection point; the first detection point is the detection point with the fault, and the second detection point is the detection point which is adjacent to the detection point with the fault and is close to the first switch tube.
In an alternative embodiment, the plurality of first interlock devices comprise an on-board charger device, a motor control device and an air conditioner control device, the vehicle-mounted charger device comprises a vehicle-mounted charger and a vehicle-mounted charger controller, the motor control device comprises a motor and a motor controller, the air conditioner control device comprises an air conditioner and an air conditioner controller, the processor, the first switch tube, the vehicle-mounted charger, the motor, the air conditioner and the second switch tube are sequentially and electrically connected to form the detection loop, the vehicle-mounted charger controller is electrically connected with a detection point of the vehicle-mounted charger on the detection loop, the motor controller is electrically connected with a detection point of the motor on the detection loop, and the air conditioner controller is electrically connected with a detection point of the air conditioner on the detection loop.
In an optional embodiment, the third pin of the first switch tube is further electrically connected to a fourth interface of the processor; the processor is used for determining whether the control module has a fault according to the third electric signal of the fourth interface.
In an optional implementation manner, the first switch unit further includes a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor, where one end of the first resistor is electrically connected to the first interface of the processor, the other end of the first resistor is electrically connected to the first pin of the first switch tube, one ends of the second resistor and the third resistor are both electrically connected to the power supply, the other end of the second resistor is electrically connected to the first pin of the first switch tube, the other end of the third resistor is electrically connected to the second pin of the first switch tube, one ends of the fourth resistor and the fifth resistor are both electrically connected to the third pin of the first switch tube, and the other end of the fourth resistor and the other end of the fifth resistor are both electrically connected to one end of the module to be detected.
In an optional implementation manner, the second switch unit further includes a sixth resistor, a seventh resistor, and an eighth resistor, one end of the sixth resistor is electrically connected to the second interface of the processor, the other end of the sixth resistor is electrically connected to the first pin of the second switch tube, one ends of the seventh resistor and the eighth resistor are both electrically connected to the second pin of the second switch tube, and the other ends of the seventh resistor and the eighth resistor are both electrically connected to the other end of the module to be detected.
In an optional embodiment, the first switching tube and the second switching tube both use MOS tubes.
In a second aspect, an embodiment of the present invention provides an automobile, including a high-voltage interlock detection device as described in any one of the previous embodiments.
The utility model provides a high pressure interlocking detection device and beneficial effect of car are: this high pressure interlocking detection device includes control module and waits to detect the module, control module includes the treater, first switch element and second switch element, the treater is connected with first switch element and the equal electricity of second switch element, the one end and the power electricity of first switch element are connected, the other end of second switch element is connected with the one end electricity of waiting to detect the module, the one end ground connection of second switch element, the other end of second switch element is connected with the other end electricity of waiting to detect the module, the treater produces the detected signal through the break-make of controlling first switch element and second switch element, and detect the signal flow through and wait to detect the module and obtain the testing result after. Therefore, the on-off of the first switch unit and the second switch unit is controlled through the processor, so that the power supply intermittently supplies voltage to the module to be detected according to the on-off conditions of the first switch unit and the second switch unit, the voltage is not supplied to the module to be detected in real time, compared with the existing high-voltage interlocking scheme, stable and reliable detection signals can be generated, and energy consumption is saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a high-voltage interlock detection device according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a high-voltage interlock detection device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another high-voltage interlock detection device according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of another high-voltage interlock detection device according to an embodiment of the present invention.
Icon: 1-high voltage interlock detection means; 10-a control module; 11-a processor; 12-a first switching unit; 13-a second switching unit; 20-a module to be detected; 21-a first interlock; 211-a controller; 212-a first interlock device; 213-vehicle charger device; 214-motor control means; 215-air conditioning control means; 2111-vehicle charger; 2112-vehicle charger controller; 2113-electric motor; 2114-motor controller; 2115-air conditioning; 2116-air conditioner controller; 22-a second interlock; 221-a second interlock device; 222-DC-DC converter; 223-PTC; 2-a power supply; s1-a first switch tube; s2-a second switch tube; p1 — first interface; p2-second interface; p3-third interface; p4-fourth interface; r1 — first resistance; r2 — second resistance; r3 — third resistance; r4-fourth resistor; r5-fifth resistor; r6-sixth resistance; r7 — seventh resistor; r8 — eighth resistance; r9 — ninth resistor; r10 — tenth resistance; r11 — eleventh resistor; r12 — twelfth resistor; c1 — first capacitance; c2 — second capacitance; c3 — third capacitance; c4-fourth capacitance.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and for simplicity of description, and do not indicate or imply that the equipment or components that are referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
The high-voltage interlocking detection device provided by the embodiment is applied to the automobile and used for monitoring the electric devices in the automobile, and the disconnection problem of the electric devices in the automobile can be timely found, so that the safety of passengers can be protected.
Please refer to fig. 1, which is a schematic structural diagram of a high-voltage interlock detection apparatus 1 according to the present embodiment. This high voltage interlock detection device 1 includes control module 10 and waits to detect module 20, control module 10 includes treater 11, first switch unit 12 and second switch unit 13, treater 11 is connected with first switch unit 12 and second switch unit 13 are all electrically, the one end and the power 2 electricity of first switch unit 12 are connected, the other end of first switch unit 12 is connected with the one end electricity of waiting to detect module 20, the one end ground connection of second switch unit 13, the other end of second switch unit 13 is connected with the other end electricity of waiting to detect module 20.
In the present embodiment, the processor 11 is configured to generate a detection signal by controlling on/off of the first switch unit 12 and the second switch unit 13, and obtain a detection result after the detection signal flows through the module to be detected 20.
It is understood that the detection signal is a PWM signal. And the generation principle of the detection signal is as follows: the processor 11 controls the on/off of the first switch unit 12 and the second switch unit 13, so that the voltage provided by the power supply 2 to the module to be detected 20 is provided according to the on/off conditions of the first switch unit 12 and the second switch unit 13. That is, when the processor 11 controls the first switch unit 12 to be turned on and off periodically and controls the second switch unit 13 to be in the on state all the time, the power supply 2 will provide a voltage to the module 20 to be detected periodically, and the voltage provided by the power supply 2 to the module 20 to be detected periodically is the detection signal. Meanwhile, when the processor 11 controls the first switch unit 12 to be always in the on state and controls the second switch unit 13 to be periodically switched on and off, the power supply 2 also periodically supplies voltage to the module 20 to be detected.
As shown in fig. 2, the first switch unit 12 includes a first switch tube S1, the second switch unit 13 includes a second switch tube S2, a first pin of the first switch tube S1 is electrically connected to the first interface P1 of the processor 11, a second pin of the first switch tube S1 is electrically connected to the power supply 2, a third pin of the first switch tube S1 is electrically connected to one end of the module 20 to be tested, a first pin of the second switch tube S2 is electrically connected to the second interface P2 of the processor 11, a second pin of the second switch tube S2 is electrically connected to the other end of the module 20 to be tested, and a third pin of the second switch tube S2 is grounded.
In this embodiment, the processor 11 is configured to send a first control signal to the first switch tube S1 and a second control signal to the second switch tube S2, so that the first switch tube S1 is turned on and off periodically, and the second switch tube S2 is in a conducting state, thereby generating a detection signal.
It will be appreciated that the power supply 2 may provide a voltage of 12V, the first control signal being a PWM signal (e.g., a PWM signal having an amplitude of 5V, a frequency of 88Hz, and a duty cycle of 50%), and the second control signal being a high level signal (e.g., a high level signal having a voltage of 5V). When the first control signal is a high level signal, the first switch tube S1 is in a conducting state, and since the second control signal is a high level signal, the second switch tube S2 is always in a conducting state, the power supply 2, the first switch tube S1, the module to be detected 20, and the second switch tube S2 form a conducting loop, and the voltage flowing through the loop is 12V voltage provided by the power supply 2, that is, the power supply 2 provides the module to be detected 20 with a detection signal with a voltage amplitude of 12V through the first switch tube S1; when the first control signal is in the low level period, the first switch tube S1 is in the off state, and then the power supply 2 does not provide 12V voltage to the module to be detected 20, so that no voltage signal is provided to the module to be detected 20 at this time, which can be understood as that the module to be detected 20 receives the detection signal with the voltage amplitude of 0V. Therefore, the periodic on/off of the first switch tube S1 correspondingly generates a detection signal with an amplitude of 12V, a frequency of 88Hz, and a duty cycle of 50%.
In this embodiment, the processor 11 sends a first control signal to the first switch tube S1 and a second control signal to the second switch tube S2, so that the first switch tube S1 is periodically turned on and off, and the second switch tube S2 is in a conducting state, and when a generated detection signal flows through the module to be detected 20, even if a capacitive device is encountered, the high-voltage to low-voltage transition can be ensured to be completed quickly, so that the detection signal is not distorted by the influence of the capacitive device, and the detection signal can have a more stable fixed amplitude, frequency and duty ratio.
Further, in this embodiment, the first switch unit 12 further includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5, one end of the first resistor R1 is electrically connected to the first interface P1 of the processor 11, the other end of the first resistor R1 is electrically connected to the first pin of the first switch tube S1, one end of the second resistor R2 and one end of the third resistor R3 are both electrically connected to the power supply 2, the other end of the second resistor R2 is electrically connected to the first pin of the first switch tube S1, the other end of the third resistor R3 is electrically connected to the second pin of the first switch tube S1, one end of the fourth resistor R4 and one end of the fifth resistor R5 are both electrically connected to the third pin of the first switch tube S1, and the other end of the fourth resistor R4 and the other end of the fifth resistor R362 are both electrically connected to one end of the module 50 to be detected.
It can be understood that the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4 and the fifth resistor R5 all play a role in limiting current. The first resistor R1 is used to prevent the processor 11 from supplying too much current to the first switch tube S1, which may damage the first switch tube S1. The second resistor R2 and the third resistor R3 are used to prevent the power source 2 from supplying too much current to the first switch tube S1, which may damage the first switch tube S1. The fourth resistor R4 and the fifth resistor R5 are used to prevent the current of the detection signal provided to the module to be detected 20 from being too large when the first switch tube S1 is turned on, and the module to be detected 20 is damaged.
Further, in this embodiment, the second switch unit 13 further includes a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8, one end of the sixth resistor R6 is electrically connected to the second interface P2 of the processor 11, the other end of the sixth resistor R6 is electrically connected to the first pin of the second switch tube S2, one end of the seventh resistor R7 and one end of the eighth resistor R8 are both electrically connected to the second pin of the second switch tube S2, and the other end of the seventh resistor R7 and the other end of the eighth resistor R8 are both electrically connected to the other end of the module 20 to be detected.
It can be understood that the sixth resistor R6, the seventh resistor R7 and the eighth resistor R8 all function to limit current. The sixth resistor R6 is used to prevent the processor 11 from supplying too much current to the second switch tube S2, which may damage the second switch tube S2. The seventh resistor R7 and the eighth resistor R8 are used to prevent the module 20 to be tested from being damaged due to an excessive current of the test signal provided to the module 20 to be tested when the first switch tube S1 is turned on.
Further, in the present embodiment, the first switch unit 12 further includes a first capacitor C1, and the second switch unit 13 further includes a second capacitor C2. The other end of the fourth resistor R4, the other end of the fifth resistor R5 and one end of the module 20 to be detected are electrically connected with one end of the first capacitor C1, the other end of the seventh resistor R7, the other end of the eighth resistor R8 and the other end of the module 20 to be detected are electrically connected with one end of the second capacitor C2, and the other end of the first capacitor C1 and the other end of the second capacitor C2 are all grounded. The first capacitor C1 and the second capacitor C2 both have a filtering function, and can filter out interference signals in the detection signal.
Further, as shown in fig. 3, the detection module includes a plurality of first interlocks 21, each first interlock 21 includes a controller 211 and a first interlock device 212, the processor 11, the first switch tube S1, each first interlock device 212, and the second switch tube S2 are electrically connected in sequence to form a detection loop, each first interlock device 212 has a corresponding detection point on the detection loop, the controller 211 corresponding to each first interlock device 212 is electrically connected to the detection point, the second pin of the second switch tube S2 is further electrically connected to the third interface P3 of the processor 11, and each controller 211 is electrically connected to the processor 11.
In this embodiment, the controller 211 is configured to obtain a first electrical signal of the detection point, and send the first electrical signal to the processor 11; the processor 11 is configured to determine a detection point of the fault according to the second electrical signal and the first electrical signal of the third interface P3, and further determine the first interlock device 212 with the fault.
It is understood that the detection point of each first interlock device 212 on the detection circuit may be disposed on the line of the end of each first interlock device 212 close to the first switch tube S1, or may be disposed on the line of the end of each first interlock device 212 close to the second switch tube S2. The method can be set according to practical situations and is not limited herein.
In this embodiment, the first electrical signal is an electrical signal generated when the detection signal flows through the detection point, the second electrical signal is an electrical signal returned to the processor 11 after the detection signal flows through the entire detection loop, if the first interlock device 212 corresponding to the detection point does not have a disconnection problem, the amplitude, the frequency, and the duty cycle of the first electrical signal acquired at the detection point are consistent with the amplitude, the frequency, and the duty cycle of the detection signal, and the amplitude, the frequency, and the duty cycle of the second electrical signal are also the same as the amplitude, the frequency, and the duty cycle of the detection signal. If the first interlocking device 212 corresponding to the detection point is disconnected, the amplitude, the frequency and the duty cycle of the first electric signal acquired at the detection point are different from those of the detection signal, and the amplitude, the frequency and the duty cycle of the second electric signal are also the same as those of the detection signal; that is, when the corresponding first interlock device 212 has an open problem, the second electric signal and the first electric signal are low-level signals of 0V in general. Therefore, the processor 11 can obtain the detection result of the disconnection of the first interlock device 212 according to the received first electrical signal and the second electrical signal, and the interfaces of each controller 211 connected to the processor 11 are different, the processor 11 can determine the detection point where the fault occurs according to the first electrical signal received by the different interfaces, and since each detection point has a corresponding relationship with the first interlock device 212, the processor 11 can determine the first interlock device 212 where the fault occurs after determining the detection point where the fault occurs.
Each Controller 211 and the processor 11 may be communicatively connected by a CAN (Controller Area Network, Controller 211 local Area Network) communication mode.
As shown in fig. 4, in this embodiment, the plurality of first interlock devices 21 include a vehicle-mounted charger device 213, a motor control device 214, and an air-conditioning control device 215, the vehicle-mounted charger device 213 includes a vehicle-mounted charger 2111 and a vehicle-mounted charger controller 2112, the motor control device 214 includes a motor 2113 and a motor controller 2114, the air-conditioning control device 215 includes an air-conditioner 2115 and an air-conditioning controller 2116, the processor 11, the first switch tube S1, the vehicle-mounted charger 2111, the motor 2113, the air-conditioner 2115, and the second switch tube S2 are sequentially electrically connected to form a detection loop, the vehicle-mounted charger controller 2112 is electrically connected to a detection point on the detection loop of the vehicle-mounted charger 2111, the motor controller 2114 is electrically connected to a detection point on the detection loop of the motor 2113, and the air-conditioning controller 2116 is electrically connected to a detection point on the detection loop.
It is understood that the connection sequence of the vehicle-mounted charger 2111, the motor 2113 and the air conditioner 2115 in the detection loop can be determined according to the actual design condition of each automobile, and is not limited herein, and the connection sequence of the present application is only one of many embodiments. The first interlock device 21 includes not only the vehicle-mounted charger device 213, the motor control device 214, and the air conditioner control device 215, but also other first interlock devices 21 with the controller 211 and the first interlock device 212 in the vehicle, that is, the first interlock device 21 is not only the vehicle-mounted charger device 213, the motor control device 214, and the air conditioner control device 215.
In this embodiment, a detection point of the vehicle-mounted charger 2111 on the detection loop may be set on a line formed by the vehicle-mounted charger 2111 and the first switching tube S1, or may be set on a line formed by the vehicle-mounted charger 2111 and the motor 2113; a detection point of the motor 2113 on the detection loop can be arranged on a line formed by the motor 2113 and the vehicle-mounted charger 2111, and can also be arranged on a line formed by the motor 2113 and the air conditioner 2115; the detection point of the air conditioner 2115 on the detection circuit may be provided on a line formed by the air conditioner 2115 and the motor 2113, or may be provided on a line formed by the air conditioner 2115 and the second switching tube S2.
In this embodiment, if a detection point of the vehicle-mounted charger 2111 on the detection loop is set on a line formed by the vehicle-mounted charger 2111 and the motor 2113, a detection point of the motor 2113 on the detection loop is set on a line formed by the motor 2113 and the air conditioner 2115; the detection point of the air conditioner 2115 on the detection circuit is provided on a line formed by the air conditioner 2115 and the second switching tube S2. If the motor 2113 has a disconnection fault, the amplitude, the frequency and the duty ratio of the first electric signal acquired by the vehicle-mounted charger controller 2112 are consistent with those of the detection signal, and the first electric signal acquired by the motor controller 2114, the first electric signal acquired by the air-conditioning controller 2116 and the second electric signal acquired by the third interface P3 of the processor 11 are low-level signals of 0V. The processor 11 can obtain a detection result that a disconnection fault occurs in the detection circuit according to that the first electric signal acquired by the motor controller 2114, the first electric signal acquired by the air-conditioning controller 2116, and the second electric signal acquired by the third interface P3 of the processor 11 are low-level signals of 0V, and can determine that a detection point where a fault occurs is a detection point corresponding to the motor 2113 and obtain that the motor 2113 is a device where a disconnection fault occurs according to that the first electric signal acquired by the vehicle-mounted charger controller 2112 is a normal electric signal, and the first electric signal acquired by the motor controller 2114, the first electric signal acquired by the air-conditioning controller 2116, and the second electric signal acquired by the third interface P3 of the processor 11 are abnormal electric signals.
If the air conditioner 2115 has a disconnection fault, the amplitude, the frequency and the duty ratio of the first electric signal acquired by the vehicle-mounted charger controller 2112 and the first electric signal acquired by the motor controller 2114 are consistent with those of the detection signal, and both the first electric signal acquired by the air conditioner controller 2116 and the second electric signal acquired by the third interface P3 of the processor 11 are low-level signals of 0V. The processor 11 can obtain a detection result that a disconnection fault occurs in the detection circuit according to that the first electrical signal acquired by the air conditioner controller 2116 and the second electrical signal acquired by the third interface P3 of the processor 11 are both low-level signals of 0V, and can determine that a detection point at which a fault occurs is a detection point corresponding to the air conditioner 2115 and obtain that the air conditioner 2115 is a device at which a disconnection fault occurs according to that the first electrical signal acquired by the vehicle-mounted charger controller 2112 and the first electrical signal acquired by the motor controller 2114 are normal electrical signals, and that the first electrical signal acquired by the air conditioner controller 2116 and the second electrical signal acquired by the third interface P3 of the processor 11 are abnormal electrical signals.
Further, as shown in fig. 3, the module to be tested 20 further includes a plurality of second interlocks 22, each second interlock 22 includes a second interlock device 221, and the processor 11, the first switch tube S1, each first interlock device 212, each second interlock device 221, and the second switch tube S2 are electrically connected in sequence to form a detection loop.
In this embodiment, the processor 11 is configured to determine a detection point where a fault occurs according to the second electrical signal and the first electrical signal of the third interface P3, and further determine that the first interlock device 212 and/or the second interlock device 221 where a fault occurs are located between the first detection point and the second detection point; the first detection point is a detection point with a fault, and the second detection point is a detection point which is adjacent to the detection point with the fault and is close to the first switch tube S1.
It is understood that the connection sequence of the first interlock device 212 and the second interlock device 221 can be determined according to the actual design of each vehicle, and is not limited thereto, and the connection sequence of the present application is only one of many embodiments.
In this embodiment, since the second interlock device 221 is not provided with the corresponding controller 211, when the detection circuit includes the second interlock device 22 without the controller 211, the processor 11 can only determine, according to the second electrical signal of the third interface P3 and the first electrical signal of each detection point, that at least one of the plurality of interlock devices in the section of line between two detection points has a disconnection fault, and the worker can manually check the interlock devices between the first detection point and the second detection point according to the first detection point and the second detection point determined by the processor 11, and finally determine the interlock device having the disconnection fault.
Further, as shown in fig. 4, the second interlock device 22 may include a DC-DC (Direct Current-Direct Current) converter 222 and a PTC223(Positive Temperature Coefficient) thermistor.
In this embodiment, if the processor 11, the first switch tube S1, the vehicle-mounted charger 2111, the DC-DC converter 222, the motor 2113, the PTC223, the air conditioner 2115, and the second switch tube S2 are sequentially and electrically connected to form a detection loop, a detection point of the vehicle-mounted charger 2111 on the detection loop may be set on a circuit formed by the vehicle-mounted charger 2111 and the DC-DC converter 222, a detection point of the motor 2113 on the detection loop may be set on a circuit formed by the motor 2113 and the PTC223, and a detection point of the air conditioner 2115 on the detection loop may be set on a circuit formed by the air conditioner 2115 and the second switch tube S2. If the motor 2113 has a disconnection fault, the amplitude, the frequency and the duty ratio of the first electric signal acquired by the vehicle-mounted charger controller 2112 are consistent with those of the detection signal, and the first electric signal acquired by the motor controller 2114, the first electric signal acquired by the air-conditioning controller 2116 and the second electric signal acquired by the third interface P3 of the processor 11 are low-level signals of 0V. The processor 11 can obtain a detection result that a disconnection fault occurs in the detection loop according to that the first electric signal acquired by the motor controller 2114, the first electric signal acquired by the air-conditioning controller 2116 and the second electric signal acquired by the third interface P3 of the processor 11 are both low-level signals of 0V, and can determine that the detection point at which the fault occurs is a detection point corresponding to the motor 2113 and further determine that at least one of the DC-DC converter 222 and the motor 2113 on the line formed between the detection point corresponding to the motor 2113 and the detection point corresponding to the vehicle-mounted charger 1 has a disconnection fault according to that the first electric signal acquired by the vehicle-mounted charger controller 2112 is a normal electric signal, the first electric signal acquired by the motor controller 2114, the first electric signal acquired by the air-conditioning controller 2116 and the second electric signal acquired by the third interface P3 of the processor 11 are abnormal electric signals, that is, there may be a case where the DC-DC converter 222 has an open failure, there may be a case where the motor 2113 has an open failure, or there may be a case where both the DC-DC converter 222 and the motor 2113 have open failures.
If the air conditioner 2115 has a disconnection fault, the amplitude, the frequency and the duty ratio of the first electric signal acquired by the vehicle-mounted charger controller 2112 and the first electric signal acquired by the motor controller 2114 are consistent with those of the detection signal, and both the first electric signal acquired by the air conditioner controller 2116 and the second electric signal acquired by the third interface P3 of the processor 11 are low-level signals of 0V. The processor 11 may obtain a detection result that a disconnection fault occurs in the detection loop according to that the first electrical signal acquired by the air conditioner controller 2116 and the second electrical signal acquired by the third interface P3 of the processor 11 are both low level signals of 0V, and may determine that the detected point at which the fault occurs is a detected point corresponding to the air conditioner 2115 according to that the first electrical signal acquired by the vehicle-mounted charger controller 2112 and the first electrical signal acquired by the motor controller 2114 are normal electrical signals, and the first electrical signal acquired by the air conditioner controller 2116 and the second electrical signal acquired by the third interface P3 of the processor 11 are abnormal electrical signals, and further determine that at least one of the PTC223 and the air conditioner 2115 on the line formed between the detected point corresponding to the air conditioner 2115 and the detected point corresponding to the motor 2113 has the disconnection fault.
Further, in this embodiment, the other end of the seventh resistor R7 and the other end of the eighth resistor R8 are further electrically connected to one end of a ninth resistor R9, the other end of the ninth resistor R9 is electrically connected to the third interface P3 of the processor 11, one end of the tenth resistor R10, and one end of the third capacitor C3, and the other end of the tenth resistor R10 and the other end of the third capacitor C3 are both grounded. The ninth resistor R9 is used to prevent the processor 11 from being damaged by an excessive current of the electrical signal when the detection signal returns to the third interface P3 of the processor 11 after flowing through the detection loop; the tenth resistor R10 and the third resistor both have a filtering function to filter out interference signals in the electrical signals when the detection signals return to the third interface P3 of the processor 11 after passing through the detection loop.
Further, in the present embodiment, the third pin of the first switch tube S1 is also electrically connected to the fourth interface P4 of the processor 11, and the processor 11 is configured to determine whether the control module 10 has a fault according to the third electrical signal of the fourth interface P4. It can be understood that if the frequency and duty ratio of the third electrical signal are different from those of the first control signal, or the amplitude of the third electrical signal is different from the voltage provided by the power supply 2, the generated detection signal is determined to be an abnormal signal, and the controller 211, the first switch tube S1, or the second switch tube S2 that generates the detection signal may have a fault, in which case, the conclusion that the processor 11 determines the fault detection point according to the first electrical signal and the second electrical signal is regarded as an error, that is, the high-voltage interlock detection apparatus 1 cannot be used.
In this embodiment, if the detection loop is short-circuited to the power supply 2, the first electrical signal acquired by the vehicle-mounted charger controller 2112, the first electrical signal acquired by the motor controller 2114, the first electrical signal acquired by the air-conditioning controller 2116, the second electrical signal acquired by the third interface P3 of the processor 11, and the third electrical signal acquired by the fourth interface P4 of the processor 11 are all 12V voltage. The processor 11 obtains a detection result that the detection loop is short-circuited to the power supply 2 according to that the first electric signal obtained by the vehicle-mounted charger controller 2112, the first electric signal obtained by the motor controller 2114, the first electric signal obtained by the air-conditioning controller 2116, the second electric signal obtained by the third interface P3 of the processor 11 and the third electric signal obtained by the fourth interface P4 of the processor 11 are all 12V voltage.
If the detection loop is shorted to the ground, the first electrical signal acquired by the vehicle-mounted charger controller 2112, the first electrical signal acquired by the motor controller 2114, the first electrical signal acquired by the air-conditioning controller 2116, the second electrical signal acquired by the third interface P3 of the processor 11, and the third electrical signal acquired by the fourth interface P4 of the processor 11 are all 0V voltage. The processor 11 obtains a detection result that the detection loop is shorted to the ground according to that the first electric signal acquired by the vehicle-mounted charger controller 2112, the first electric signal acquired by the motor controller 2114, the first electric signal acquired by the air-conditioning controller 2116, the second electric signal acquired by the third interface P3 of the processor 11, and the third electric signal acquired by the fourth interface P4 of the processor 11 are all 0V voltage.
Further, in this embodiment, the other end of the fourth resistor R4 and the other end of the fifth resistor R5 are both further electrically connected to one end of an eleventh resistor R11, the other end of the eleventh resistor R11 is electrically connected to the fourth interface P4 of the processor 11, one end of the twelfth resistor R12, and one end of the fourth capacitor C4, and the other end of the twelfth resistor R12 and the other end of the fourth capacitor C4 are both grounded. The eleventh resistor R11 is used to prevent the current of the detection signal from being too large and damaging the processor 11; the twelfth resistor R12 and the fourth resistor both play a role in filtering and filtering interference signals in the detection signal.
Further, in this embodiment, the first switch tube S1 and the second switch tube S2 may both adopt MOS transistors, the first pin of the first switch tube S1 and the first pin of the second switch tube S2 are both gates of the MOS transistors, the second pin of the first switch tube S1 and the second pin of the second switch tube S2 are both drains of the MOS transistors, and the third pin of the first switch tube S1 and the third pin of the second switch tube S2 are both sources of the MOS transistors.
In the present embodiment, the processor 11 may be an ECU (electronic control Unit) chip in a battery management system of an automobile.
To sum up, the utility model provides a high pressure interlocking detection device and car, this high pressure interlocking detection device includes control module and waits to detect the module, control module includes the treater, first switch element and second switch element, the treater is connected with the equal electricity of first switch element and second switch element, the one end and the power electricity of first switch element are connected, the other end of second switch element is connected with the one end electricity that waits to detect the module, the one end ground connection of second switch element, the other end of second switch element is connected with the other end electricity that waits to detect the module, the treater produces the detected signal through the break-make of controlling first switch element and second switch element, and detect the module and obtain the testing result after waiting to detect the signal flow through. Therefore, the on-off of the first switch unit and the second switch unit is controlled through the processor, so that the power supply indirectly provides voltage for the module to be detected according to the on-off conditions of the first switch unit and the second switch unit, the voltage can not be provided for the module to be detected in real time, compared with the existing high-voltage interlocking scheme, stable and reliable detection signals can be generated, and energy consumption is saved. And the controller of the first interlocking device is electrically connected with the detection points in the detection loop, so that the interlocking device with the disconnection fault in the detection loop can be locked on a line between two specific detection points, the position with the disconnection fault can be accurately judged, and the safety of passengers can be better protected.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A high-voltage interlocking detection device is characterized by comprising a control module and a module to be detected, wherein the control module comprises a processor, a first switch unit and a second switch unit, the processor is electrically connected with the first switch unit and the second switch unit, one end of the first switch unit is electrically connected with a power supply, the other end of the first switch unit is electrically connected with one end of the module to be detected, one end of the second switch unit is grounded, and the other end of the second switch unit is electrically connected with the other end of the module to be detected;
the processor is used for generating a detection signal by controlling the on-off of the first switch unit and the second switch unit, and obtaining a detection result after the detection signal flows through the module to be detected.
2. The high-voltage interlock detection device according to claim 1, wherein the first switch unit comprises a first switch tube, the second switch unit comprises a second switch tube, a first pin of the first switch tube is electrically connected to the first interface of the processor, a second pin of the first switch tube is electrically connected to the power supply, a third pin of the first switch tube is electrically connected to one end of the module to be detected, a first pin of the second switch tube is electrically connected to the second interface of the processor, a second pin of the second switch tube is electrically connected to the other end of the module to be detected, and a third pin of the second switch tube is grounded;
the processor is used for sending a first control signal to the first switch tube and sending a second control signal to the second switch tube, so that the first switch tube is periodically switched on and off, the second switch tube is in a conducting state, and the detection signal is generated.
3. The high-voltage interlock detection device according to claim 2, wherein the module to be detected comprises a plurality of first interlocks, each first interlock comprises a controller and a first interlock device, the processor, the first switch tube, each first interlock device and the second switch tube are sequentially electrically connected to form a detection loop, each first interlock device has a corresponding detection point on the detection loop, the controller corresponding to each first interlock device is electrically connected to the detection point, the second pin of the second switch tube is further electrically connected to the third interface of the processor, and each controller is electrically connected to the processor;
the controller is used for acquiring a first electric signal of the detection point and sending the first electric signal to the processor;
the processor is used for determining a fault detection point according to the second electric signal of the third interface and the first electric signal, and further determining a fault first interlocking device.
4. The high-voltage interlock detection device according to claim 3, wherein the module to be detected further comprises a plurality of second interlock devices, each second interlock device comprises a second interlock device, and the processor, the first switch tube, each first interlock device, each second interlock device, and the second switch tube are electrically connected in sequence to form a detection loop;
the processor is used for determining a fault detection point according to the second electric signal of the third interface and the first electric signal, and further determining that the fault first interlocking device and/or the fault second interlocking device are/is located between the first detection point and the second detection point; the first detection point is the detection point with the fault, and the second detection point is the detection point which is adjacent to the detection point with the fault and is close to the first switch tube.
5. The high-voltage interlock detection device according to claim 3, wherein said plurality of first interlock devices include an in-vehicle charger device, a motor control device, and an air-conditioning control device, the vehicle-mounted charger device comprises a vehicle-mounted charger and a vehicle-mounted charger controller, the motor control device comprises a motor and a motor controller, the air conditioner control device comprises an air conditioner and an air conditioner controller, the processor, the first switch tube, the vehicle-mounted charger, the motor, the air conditioner and the second switch tube are sequentially and electrically connected to form the detection loop, the vehicle-mounted charger controller is electrically connected with a detection point of the vehicle-mounted charger on the detection loop, the motor controller is electrically connected with a detection point of the motor on the detection loop, and the air conditioner controller is electrically connected with a detection point of the air conditioner on the detection loop.
6. The high voltage interlock detection device according to any one of claims 2-4, wherein the third pin of the first switch tube is further electrically connected to a fourth interface of the processor;
the processor is used for determining whether the control module has a fault according to the third electric signal of the fourth interface.
7. The high voltage interlock detection device of claim 2, wherein said first switching unit further comprises a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor, one end of the first resistor is electrically connected with a first interface of the processor, the other end of the first resistor is electrically connected with a first pin of the first switch tube, one end of the second resistor and one end of the third resistor are both electrically connected with the power supply, the other end of the second resistor is electrically connected with the first pin of the first switch tube, the other end of the third resistor is electrically connected with the second pin of the first switch tube, one end of the fourth resistor and one end of the fifth resistor are both electrically connected with the third pin of the first switch tube, the other end of the fourth resistor and the other end of the fifth resistor are electrically connected with one end of the module to be detected.
8. The high-voltage interlock detection device according to claim 2, wherein the second switch unit further includes a sixth resistor, a seventh resistor, and an eighth resistor, one end of the sixth resistor is electrically connected to the second interface of the processor, the other end of the sixth resistor is electrically connected to the first pin of the second switch tube, one ends of the seventh resistor and the eighth resistor are both electrically connected to the second pin of the second switch tube, and the other ends of the seventh resistor and the eighth resistor are both electrically connected to the other end of the module to be detected.
9. The high-voltage interlock detection device according to claim 2, wherein the first switch tube and the second switch tube are both MOS tubes.
10. An automobile, characterized by comprising a high-voltage interlock detection device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921540334.2U CN211402678U (en) | 2019-09-17 | 2019-09-17 | High-voltage interlocking detection device and automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921540334.2U CN211402678U (en) | 2019-09-17 | 2019-09-17 | High-voltage interlocking detection device and automobile |
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| Publication Number | Publication Date |
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| CN211402678U true CN211402678U (en) | 2020-09-01 |
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| CN201921540334.2U Active CN211402678U (en) | 2019-09-17 | 2019-09-17 | High-voltage interlocking detection device and automobile |
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| CN (1) | CN211402678U (en) |
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