CN221199910U - Device for detecting connection reliability of high-voltage connector - Google Patents
Device for detecting connection reliability of high-voltage connector Download PDFInfo
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- CN221199910U CN221199910U CN202323111445.0U CN202323111445U CN221199910U CN 221199910 U CN221199910 U CN 221199910U CN 202323111445 U CN202323111445 U CN 202323111445U CN 221199910 U CN221199910 U CN 221199910U
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- 238000004378 air conditioning Methods 0.000 claims 1
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Abstract
The utility model discloses a device for detecting reliable connection of a high-voltage connector, which comprises a microcontroller unit, a CAN bus communication unit and an alarm unit, wherein the microcontroller unit adopts an S32K3 series singlechip, the CAN bus communication unit adopts an SN65HVD233D CAN bus transceiver chip, and the CAN bus communication unit is connected with an external CAN bus and the microcontroller unit and is used as a transceiver for CAN data transmission; the alarm unit is connected with the microcontroller unit and an external alarm signal line. The utility model provides a device for detecting reliable connection of a high-voltage connector, which can cut off a loop power supply in time to protect when the loop is in short circuit with the power supply, and ensure that the equipment and an external loop cannot be irreversibly damaged. The loop output can be controlled according to the loop requirement, and various adaptations can be performed.
Description
Technical Field
The utility model relates to the technical field of automobile high-voltage loop detection, in particular to a device for detecting connection reliability of a high-voltage connector.
Background
Along with the popularization of electric vehicles and the wide use of electric power resources, electric engineering machinery is gradually aligned to the electric vehicles, and electric energy is used as energy power, so that zero emission can be achieved, fuel oil is not required to be added, and engine oil and an engine oil filter are not required to be replaced; the noise level is low, so that the operation can be performed anytime and anywhere, and the working efficiency is improved; compared with engineering machinery driven by diesel, the operation cost is greatly reduced; and because the electric engineering machinery does not use inflammable and explosive materials, the safety level is higher, and accidents caused by mechanical faults are reduced.
With the continuous development of the modern industry, various mechanical devices and industrial facilities, in which high-voltage electrical devices are inevitably present, are increasingly used. The use of these high-voltage electrical devices requires safety assurance, so it is important to detect the safety and stability of the operation of the high-voltage electrical devices.
In the third part of the ISO International Standard ISO 6469-3:2001 electric automobile safety Specification: in personnel electrical injury protection, it is prescribed that high voltage components on the vehicle should have a high voltage loop interlock detection device. The aim is to confirm the integrity of the high-voltage system of the whole vehicle, and when the circuit of the high-voltage system is disconnected or the integrity is damaged, safety protection measures such as high-voltage disconnection and the like are required to be started.
The high-voltage loop detection device is used for detecting loosening of a high-voltage loop and providing alarm information for a vehicle controller before high-voltage power failure, and the time for taking countermeasures by a vehicle system is reserved; secondly, the system plays a role before the vehicle is electrified and runs, and when the incomplete circuit is detected, the system cannot be electrified, so that accidents caused by virtual connection and other problems are avoided; thirdly, the safety accident caused by manual misoperation is prevented.
For example, the Jiledi Haoho EV300 electric automobile adopts a PWM scheme in the design of a high-voltage loop detection circuit, but the scheme causes the problems of excessively high requirements on a detection system and poor detection time, so that the detection by using the PWM method greatly increases the complexity of detection and judgment control, increases the response time of the system, increases the high-voltage power-off time and causes irreversible damage to equipment. The existing high-voltage loop detection device does not have a perfect solution.
Disclosure of utility model
1. The technical problems to be solved are as follows:
Aiming at the technical problems, the utility model provides a device for detecting the connection reliability of a high-voltage connector.
2. The technical scheme is as follows:
The device for detecting the connection reliability of the high-voltage connector comprises a microcontroller unit, a CAN bus communication unit and an alarm unit, wherein the microcontroller unit adopts an S32K3 series singlechip, the CAN bus communication unit adopts an SN65HVD233D CAN bus transceiver chip, and the CAN bus communication unit is connected with an external CAN bus and the microcontroller unit and is used as a transceiver for CAN data transmission; the alarm unit is connected with the microcontroller unit and an external alarm signal wire, the alarm unit converts signals output by the microcontroller unit into voltage signals and outputs the voltage signals to the automobile alarm system through the alarm signal wire, the microcontroller unit is connected with three control detection loops, the control detection loops are connected with an external loop to be detected of an automobile, and the control detection loops are used for detecting input and output performances of the external loop.
Further, the microcontroller unit is connected with a power supply unit, the power supply unit is connected with an automobile battery, the power supply unit outputs 6.5V voltage by using a 24V-to-6.5V buck chip TPS54560-Q1, outputs 5V voltage by using a 6.5V-to-5V buck chip SPX3819M5-L-5-0/TR and outputs 3.3V voltage by using a 5V-to-3.3V buck chip SPX3819M5-L-3.3, and the power supply unit is used for supplying power to the microcontroller unit and the control detection loop by the automobile battery.
Further, the microcontroller unit is connected to an external hardware enable signal line.
Further, the external circuit comprises a motor and a controller circuit and an air conditioner circuit thereof.
Further, the control detection loop includes an operational amplifier U3, a cs1_out end and a cs1_in end, the cs1_out end and the cs1_in end are connected with an external loop, pins No. 5 and No. 6 of the operational amplifier U3 form a voltage dividing circuit with an R21 resistor and an R27 resistor, the voltage dividing circuit forms a stable voltage at a pin No. 7 of the operational amplifier U3, and the circuit formed by the pin No. 7 of the operational amplifier U3, an output pin cs1_s_ctr of the microcontroller unit and a triode Q1 is commonly used for controlling the on/off of the triode Q2, and VCC can output a stable voltage at the cs1_out end by turning on the triode Q2 through a diode D3, a current limiting resistor R15 and a diode D4; the CS 1-IN end is grounded through a current limiting resistor R28, the CS 1-IN end is connected with a CS 1-ILA port of the microcontroller unit through a current limiting resistor R32, the microcontroller unit detects an input voltage signal through the CS 1-ILA port and calculates whether the load of the external loop is IN a normal range or not; the CS1_CTR port of the micro-controller unit, the R18 resistor, the R19 resistor and the R22 resistor form a cutting loop for cutting off the MOS tube of the Q4, and the Q4 is connected with the CS1_IN end and the No. 4 pin of the operational amplifier U3.
Further, a voltage dividing resistor circuit formed by the CS1 CHK port, the R23 resistor and the R24 resistor of the micro-controller unit shorts the CS1 OUT terminal and the CS1 IN terminal for simulating an external loop.
Further, the CS1OUT end of the control detection loop is connected to the No. 3 pin of the operational amplifier U3, and is used for feeding back the input voltage of the No. 5 pin of the operational amplifier U3.
Further, the pin 10 of the operational amplifier U3 forms a voltage dividing circuit with the potentiometer RV1 and the resistors R11 and R14, and is used for adjusting and controlling the voltage of the terminal CS1OUT, then adjusting the detection range of the external loop load, the potentiometer RV1 is connected with the voltage dividing circuit formed by the resistors R30 and R31, the voltage is reduced by the voltage dividing circuit and then enters the terminal CS1OUT, enters the microcontroller unit to detect and feed back whether the voltage is in a normal range, and if the voltage exceeds or is lower than the normal range, the value of the potentiometer RV1 is adjusted, so as to achieve the effect of enabling the terminal CS1OUT to output a stable voltage.
3. The beneficial effects are that:
The utility model provides a device for detecting reliable connection of a high-voltage connector, which can cut off a loop power supply in time to protect when the loop is in short circuit with the power supply, and ensure that the equipment and an external loop cannot be irreversibly damaged. The loop output can be controlled according to the loop requirement, and various adaptations can be performed. Compared to PWM detection methods, it is simpler and the required detection time is greatly shortened. The input loop is accurately checked and the output function is reliable and stable. And (3) quick and efficient full-automatic detection and production flow.
Drawings
FIG. 1 is a diagram of the connection of modules of the device of the present utility model;
FIG. 2 is a schematic diagram of the operation of the device of the present utility model;
FIG. 3 is a circuit diagram of a control detection loop of the device of the present utility model;
fig. 4 is a schematic connection of the external circuit of the device of the present utility model.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
As shown in figures 1 to 4 of the drawings,
Specific examples: the device for detecting the connection reliability of the high-voltage connector comprises a microcontroller unit, a CAN bus communication unit and an alarm unit, wherein the microcontroller unit adopts an S32K3 series singlechip, the CAN bus communication unit adopts an SN65HVD233D CAN bus transceiver chip, and the CAN bus communication unit is connected with an external CAN bus and the microcontroller unit and is used as a transceiver for CAN data transmission; the alarm unit is connected with the microcontroller unit and an external alarm signal wire, the alarm unit converts signals output by the microcontroller unit into voltage signals and outputs the voltage signals to the automobile alarm system through the alarm signal wire, the microcontroller unit is connected with three control detection loops, the control detection loops are connected with an external loop to be detected of an automobile, and the control detection loops are used for detecting input and output performances of the external loop.
The microcontroller unit is connected with the power supply unit, the power supply unit is connected with the automobile battery, the power supply unit uses a 24V-to-6.5V buck chip TPS54560-Q1 to output 6.5V voltage, uses a 6.5V-to-5V buck chip SPX3819M5-L-5-0/TR to output 5V voltage and a 5V-to-3.3V buck chip SPX3819M5-L-3.3 to output 3.3V voltage, and is used for the automobile battery to supply power to the microcontroller unit and the control detection loop.
The microcontroller unit is connected to an external hardware enable signal line. The external circuit comprises a motor, a controller circuit thereof and an air conditioner circuit.
The microcontroller unit receives enabling signals of the external CAN bus and external hardware, detects the input and output performances of the external loop through the control detection loop, judges the connection state of the equipment connector on the external loop, and triggers the alarm unit to generate an alarm signal and starts to alarm if the equipment connector is in poor contact or is not connected.
The control detection loop specifically comprises an operational amplifier U3, a CS1_OUT end and a CS1_IN end, wherein the CS1_OUT end and the CS1_IN end are connected with an external loop, pins 5 and 6 of the operational amplifier U3, an R21 resistor and an R27 resistor form a voltage dividing circuit, the voltage dividing circuit forms a stable voltage at a pin 7 of the operational amplifier U3, and a circuit formed by combining the pin 7 of the operational amplifier U3, an output pin CS1_S_CTR of a microcontroller unit and a triode Q1 is commonly used for controlling the on and off of the triode Q2, and VCC can output a stable voltage at the CS1_OUT end by starting the triode Q2 through a diode D3, a current limiting resistor R15 and a diode D4; the CS 1-IN end is grounded through the current limiting resistor R28, equipment damage caused by overlarge current from the CS 1-IN end to the ground can be prevented, the CS 1-IN end is connected with a CS 1-ILA port of the microcontroller unit through the current limiting resistor R32, the microcontroller unit detects an input voltage signal through the CS 1-ILA port, and whether the load of an external loop is IN a normal range is calculated; if the external load resistance value of the input terminal CS1 IN terminal or the output terminal CS1 OUT terminal exceeds the prescribed value or the terminal pair is IN high voltage short circuit of 24V, the CS1 CTR port, the R18 resistor, the R19 resistor and the R22 resistor of the micro-controller unit form a cutting loop for cutting off the MOS tube of the Q4 to achieve the purpose of protecting equipment, and the Q4 is connected with the CS1 IN terminal and the No. 4 pin of the operational amplifier U3.
The CS1_CHK port of the micro-controller unit is IN short circuit with the CS1_OUT terminal and the CS1_IN terminal (the external load is regarded as 0Ω) through a voltage dividing resistor circuit formed by the CS1_CHK port, the R23 resistor and the R24 resistor, and the voltage dividing resistor circuit is used for simulating an external loop, so that the detection of the self-circuit functional integrity of the equipment is completed.
The CS1OUT end of the control detection loop is connected with the No. 3 pin of the operational amplifier U3 and is used for feeding back the input voltage of the No. 5 pin of the operational amplifier U3, so that the output voltage can be controlled more accurately and effectively.
The No. 10 pin of the operational amplifier U3, the potentiometer RV1, the resistor R11 and the resistor R14 form a voltage dividing circuit, the voltage dividing circuit is used for adjusting and controlling the voltage of the end of the detection loop CS1OUT, then adjusting the detection range of an external loop load, the potentiometer RV1 is connected with the voltage dividing circuit formed by the resistor R30 and the resistor R31, the voltage enters the end of the CS1OUT after being reduced by the voltage dividing circuit, the voltage enters the micro-controller unit for detection and feedback of whether the voltage is in a normal range, and if the voltage exceeds or is lower than the normal range, the value of the potentiometer of the RV1 is adjusted, so that the effect of enabling the end of the CS1OUT to output stable voltage is achieved.
While the utility model has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model, and it is intended that the scope of the utility model shall be defined by the appended claims.
Claims (8)
1. The device for detecting the connection reliability of the high-voltage connector is characterized by comprising a microcontroller unit, a CAN bus communication unit and an alarm unit, wherein the microcontroller unit adopts an S32K3 series singlechip, the CAN bus communication unit adopts an SN65HVD233D CAN bus transceiver chip, and the CAN bus communication unit is connected with an external CAN bus and the microcontroller unit and is used as a transceiver for CAN data transmission; the alarm unit is connected with the microcontroller unit and an external alarm signal wire, the alarm unit converts signals output by the microcontroller unit into voltage signals and outputs the voltage signals to the automobile alarm system through the alarm signal wire, the microcontroller unit is connected with three control detection loops, the control detection loops are connected with an external loop to be detected of an automobile, and the control detection loops are used for detecting input and output performances of the external loop.
2. The device for detecting reliable connection of high-voltage connectors according to claim 1, wherein the microcontroller unit is connected to a power supply unit, the power supply unit is connected to a car battery, the power supply unit outputs 6.5V voltage using a 24V to 6.5V buck chip TPS54560-Q1, outputs 5V voltage using a 6.5V to 5V buck chip SPX3819M5-L-5-0/TR, and outputs 3.3V voltage using a 5V to 3.3V buck chip SPX3819M5-L-3.3 for the car battery to power the microcontroller unit and the control detection circuit.
3. A device for detecting a reliable connection of a high voltage connector as claimed in claim 2, wherein the micro-controller unit is connected to an external hardware enable signal line.
4. A device for detecting reliable connection of high voltage connectors according to claim 3, wherein said external circuit comprises an electric motor and its controller circuit and an air conditioning circuit.
5. The device for detecting reliable connection of high voltage connector as claimed IN claim 4, wherein the control detection loop includes an operational amplifier U3, a cs1_out terminal and a cs1_in terminal, the cs1_out terminal and the cs1_in terminal are connected to an external loop, pins No. 5 and No. 6 of the operational amplifier U3 form a voltage dividing circuit with R21 resistor and R27 resistor, the voltage dividing circuit forms a stable voltage at pin No. 7 of the operational amplifier U3, the circuit formed by the combination of pin No. 7 of the operational amplifier U3, the output pin cs1_s_ctr of the microcontroller unit and the transistor Q1 is commonly used for controlling the turn-on and turn-off of the transistor Q2, and VCC can be made to output a stable voltage at the cs1_out terminal by turning on the transistor Q2 through the diode D3, the current limiting resistor R15 and the diode D4; the CS 1-IN end is grounded through a current limiting resistor R28, the CS 1-IN end is connected with a CS 1-ILA port of the microcontroller unit through a current limiting resistor R32, the microcontroller unit detects an input voltage signal through the CS 1-ILA port and calculates whether the load of the external loop is IN a normal range or not; the CS1_CTR port of the micro-controller unit, the R18 resistor, the R19 resistor and the R22 resistor form a cutting loop for cutting off the MOS tube of the Q4, and the Q4 is connected with the CS1_IN end and the No. 4 pin of the operational amplifier U3.
6. The device for detecting reliable connection of high voltage connectors according to claim 5, wherein a voltage dividing resistor circuit formed by the CS1 CHK port, the R23 resistor and the R24 resistor of the micro-controller unit shorts the CS1 OUT port and the CS1 IN port for simulating an external circuit.
7. The device for detecting reliable connection of high voltage connectors as recited in claim 6, wherein the CS1OUT terminal of the control detection circuit is connected to pin 3 of the operational amplifier U3 for feeding back the input voltage of pin 5 of the operational amplifier U3.
8. The device for detecting reliable connection of high voltage plug-in components according to claim 7, wherein the pin 10 of the operational amplifier U3, the potentiometer RV1, the resistors R11 and R14 form a voltage dividing circuit for adjusting and controlling the voltage of the CS1OUT terminal of the detection loop, then adjusting the detection range of the external loop load, the potentiometer RV1 is connected with the voltage dividing circuit formed by the resistors R30 and R31, the voltage enters the CS1OUT terminal after being reduced by the voltage dividing circuit, the voltage enters the micro-controller unit for detection and feedback of whether the voltage is in a normal range, and if the voltage exceeds or is lower than the normal range, the value of the potentiometer RV1 is adjusted to achieve the effect of enabling the CS1OUT terminal to output stable voltage.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221199910U true CN221199910U (en) | 2024-06-21 |
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