New energy automobile controller wake-up circuit
By designing a CAN bus wake-up circuit in new energy vehicles, integrating and proportionally amplifying the wake-up signal using components such as operational amplifiers and capacitors, the error feedback wake-up problem caused by CAN bus interference is solved, and the filtering of the error feedback signal is realized. And warnings prevent the vehicle controller from erroneously awakening and improve system stability.
Patent Information
- Application Number
- CN202411563723.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-01-07
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In new energy vehicles, the CAN bus is easily disturbed in a multi-electronic device environment, resulting in false feedback of wake-up signals, which in turn leads to the problem of wrong wake-up of the vehicle controller.
A new energy vehicle controller wake-up circuit was designed to determine the existence time, stability and accuracy of the CAN feedback signal, filter the wrong feedback wake-up signal, and warn it when necessary to prevent the vehicle controller from Wake up error. The circuit includes components such as operational amplifiers, resistors, capacitors and diodes, and uses technical means such as integral, proportional amplification and feedback loops to ensure the accuracy and stability of the signal.
It effectively filters the wake-up signal of false feedback to prevent the vehicle controller from erroneously awakening in the state of interference of the CAN bus, and improves the stability and reliability of the system.
Smart Images
Figure CN119261790A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a new energy vehicle controller wake-up circuit. Background Art
[0002] In order to extend the service life of new energy vehicle batteries, the vehicle controller needs to enter a dormant state when the vehicle is not in use to reduce power consumption. When the vehicle is in use, it can be awakened by feedback of a wake-up signal through the CAN bus. When the CAN bus feeds back a wake-up signal, the wake-up signal is fed back to the controller wake-up circuit. The wake-up circuit wakes up the vehicle controller after receiving the wake-up signal for a certain period of time. When there are too many electronic devices in the vehicle's environment, the CAN bus will be interfered with and the wake-up signal will be fed back incorrectly. The wake-up circuit cannot identify and filter it. Therefore, a new energy vehicle controller wake-up circuit is proposed. The circuit can determine whether the CAN bus is fed back incorrectly under signal interference by the duration, stability and accuracy of the wake-up signal fed back by the CAN, and filter the incorrectly fed back wake-up signal and give corresponding alarms to prevent incorrect wake-up of the vehicle controller when the CAN bus is interfered. Summary of the invention
[0003] In view of the above technical problems, the purpose of the present invention is to provide a new energy vehicle controller wake-up circuit, including a first resistor R1, a fourth resistor R4, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a sixth operational amplifier U6, a first capacitor C1, a first connector P1, and a second connector P2, wherein one end of the first resistor R1 is connected to the first connector P1, the other end of the first resistor R1 is connected to one end of the fourth resistor R4, one end of the first capacitor C1, and the in-phase end of the sixth operational amplifier U6, the inverting end of the sixth operational amplifier U6 is connected to one end of the seventeenth resistor R17 and one end of the eighteenth resistor R18, the other end of the seventeenth resistor R17 is connected to a power supply, the output end of the sixth operational amplifier U6 is connected to one end of the nineteenth resistor R19 and the second connector P2, the other end of the fourth resistor R4, the other end of the eighteenth resistor R18, the other end of the nineteenth resistor R19, the other end of the first capacitor C1 and the ground end are connected.
[0004] Furthermore, it also includes a second resistor R2, a third resistor R3, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a first operational amplifier U1, a second operational amplifier U2, a third operational amplifier U3, a first triode Q1, a second diode D2, and a third diode D3, wherein one end of the ninth resistor R9 is connected to the power supply, the other end of the ninth resistor R9 is connected to one end of the eighth resistor R8 and the in-phase end of the third operational amplifier U3, the inverting end of the third operational amplifier U3 is connected to one end of the sixth resistor R6 and one end of the seventh resistor R7, the output end of the third operational amplifier U3 is connected to one end of the fifth resistor R5 and the other end of the sixth resistor R6, the other end of the fifth resistor R5 is connected to one end of the second resistor R2, and the second operational amplifier U3 is connected to one end of the sixth resistor R6. The inverting end of the operational amplifier U2 is connected, the non-inverting end of the second operational amplifier U2 is connected to the first connector P1, the output end of the second operational amplifier U2 is connected to the anode of the second diode D2, the cathode of the second diode D2 is connected to the cathode of the third diode D3 and the base of the first transistor Q1, the collector of the first transistor Q1 is connected to the inverting end of the first operational amplifier U1 and the non-inverting end of the sixth operational amplifier U6, the non-inverting end of the first operational amplifier U1 is connected to the other end of the second resistor R2 and one end of the third resistor R3, the output end of the first operational amplifier U1 is connected to one end of the tenth resistor R10 and the anode of the third diode D3, the other end of the third resistor R3, the other end of the seventh resistor R7, the other end of the eighth resistor R8, the other end of the tenth resistor R10, the emitter of the first transistor Q1 and the grounding end are connected.
[0005] Furthermore, it also includes an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a fourth operational amplifier U4, a fifth operational amplifier U5, a second capacitor C2, and a first diode D1, wherein the in-phase end of the fourth operational amplifier U4 is connected to the first connector P1, the inverting end of the fourth operational amplifier U4 is connected to one end of the thirteenth resistor R13, the output end of the fourth operational amplifier U4 is connected to the other end of the thirteenth resistor R13, one end of the fourteenth resistor R14, and the second capacitor C 2, a non-inverting end of the fifth operational amplifier U5 is connected to one end of the fifteenth resistor R15 and the other end of the second capacitor C2, an inverting end of the fifth operational amplifier U5 is connected to one end of the eleventh resistor R11, an output end of the fifth operational amplifier U5 is connected to one end of the twelfth resistor R12 and the anode of the first diode D1, a cathode of the first diode D1 is connected to a cathode of the second diode D2, and the other end of the eleventh resistor R11, the other end of the twelfth resistor R12, the other end of the fourteenth resistor R14, the other end of the fifteenth resistor R15 and the ground are connected.
[0006] Furthermore, it includes a first light-emitting diode LED1 and a second light-emitting diode LED2, wherein the anode of the first light-emitting diode LED1 is connected to the output end of the second operational amplifier U2, the anode of the second light-emitting diode LED2 is connected to the output end of the first operational amplifier U1, and the cathode of the first light-emitting diode LED1, the cathode of the second light-emitting diode LED2 are connected to the ground end.
[0007] Furthermore, it also includes a third light emitting diode LED3, one end of the third light emitting diode LED3 is connected to the output end of the fifth operational amplifier U5, and the other end of the third light emitting diode LED3 is connected to the ground end.
[0008] Furthermore, the first capacitor C1 is an adjustable capacitor.
[0009] Furthermore, the eighteenth resistor R18 is an adjustable resistor.
[0010] The beneficial effects of the present invention compared with the prior art are:
[0011] The present invention can determine whether the CAN bus has erroneously fed back a wake-up signal under a state of signal interference by analyzing the existence duration, stability and accuracy of the wake-up signal, and can filter the erroneously fed back wake-up signal and issue a corresponding alarm to prevent the vehicle controller from erroneously waking up when the CAN bus is interfered with. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the prior art and the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0013] Figure 1 The circuit structure diagram provided by the present invention. DETAILED DESCRIPTION
[0014] In order to make the objects and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.
[0015] The present invention discloses a new energy vehicle controller wake-up circuit, comprising a first resistor R1, a fourth resistor R4, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a sixth operational amplifier U6, a first capacitor C1, a first connector P1, and a second connector P2, wherein one end of the first resistor R1 is connected to the first connector P1, the other end of the first resistor R1 is connected to one end of the fourth resistor R4, one end of the first capacitor C1, and a non-inverting end of the sixth operational amplifier U6, the inverting end of the sixth operational amplifier U6 is connected to one end of the seventeenth resistor R17 and one end of the eighteenth resistor R18, the other end of the seventeenth resistor R17 is connected to a power supply, the output end of the sixth operational amplifier U6 is connected to one end of the nineteenth resistor R19 and the second connector P2, the other end of the fourth resistor R4, the other end of the eighteenth resistor R18, the other end of the nineteenth resistor R19, the other end of the first capacitor C1, and a grounding end are connected.
[0016] Specifically, it also includes a second resistor R2, a third resistor R3, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a first operational amplifier U1, a second operational amplifier U2, a third operational amplifier U3, a first transistor Q1, a second diode D2, and a third diode D3. One end of the ninth resistor R9 is connected to the power supply, the other end of the ninth resistor R9 is connected to one end of the eighth resistor R8 and the in-phase end of the third operational amplifier U3, the inverting end of the third operational amplifier U3 is connected to one end of the sixth resistor R6 and one end of the seventh resistor R7, the output end of the third operational amplifier U3 is connected to one end of the fifth resistor R5 and the other end of the sixth resistor R6, the other end of the fifth resistor R5 is connected to one end of the second resistor R2, and the second operational amplifier U3 is connected to the inverting end of the third operational amplifier U3. The inverting end of the operational amplifier U2 is connected, the non-inverting end of the second operational amplifier U2 is connected to the first connector P1, the output end of the second operational amplifier U2 is connected to the anode of the second diode D2, the cathode of the second diode D2 is connected to the cathode of the third diode D3 and the base of the first transistor Q1, the collector of the first transistor Q1 is connected to the inverting end of the first operational amplifier U1 and the non-inverting end of the sixth operational amplifier U6, the non-inverting end of the first operational amplifier U1 is connected to the other end of the second resistor R2 and one end of the third resistor R3, the output end of the first operational amplifier U1 is connected to one end of the tenth resistor R10 and the anode of the third diode D3, the other end of the third resistor R3, the other end of the seventh resistor R7, the other end of the eighth resistor R8, the other end of the tenth resistor R10, the emitter of the first transistor Q1 and the grounding end are connected.
[0017] Specifically, it also includes an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a fourth operational amplifier U4, a fifth operational amplifier U5, a second capacitor C2, and a first diode D1. The in-phase end of the fourth operational amplifier U4 is connected to the first connector P1, the inverting end of the fourth operational amplifier U4 is connected to one end of the thirteenth resistor R13, the output end of the fourth operational amplifier U4 is connected to the other end of the thirteenth resistor R13, one end of the fourteenth resistor R14, and the second capacitor C2. 2, a non-inverting end of the fifth operational amplifier U5 is connected to one end of the fifteenth resistor R15 and the other end of the second capacitor C2, an inverting end of the fifth operational amplifier U5 is connected to one end of the eleventh resistor R11, an output end of the fifth operational amplifier U5 is connected to one end of the twelfth resistor R12 and the anode of the first diode D1, a cathode of the first diode D1 is connected to a cathode of the second diode D2, and the other end of the eleventh resistor R11, the other end of the twelfth resistor R12, the other end of the fourteenth resistor R14, the other end of the fifteenth resistor R15 and the ground are connected.
[0018] Specifically, it also includes a first light emitting diode LED1 and a second light emitting diode LED2, wherein the anode of the first light emitting diode LED1 is connected to the output end of the second operational amplifier U2, the anode of the second light emitting diode LED2 is connected to the output end of the first operational amplifier U1, and the cathode of the first light emitting diode LED1, the cathode of the second light emitting diode LED2 are connected to the ground end.
[0019] Specifically, it also includes a third light emitting diode LED3, one end of the third light emitting diode LED3 is connected to the output end of the fifth operational amplifier U5, and the other end of the third light emitting diode LED3 is connected to the ground end.
[0020] Specifically, the first capacitor C1 is an adjustable capacitor.
[0021] Specifically, the eighteenth resistor R18 is an adjustable resistor.
[0022] The CAN bus feeds back a wake-up signal to the wake-up circuit, and the wake-up circuit wakes up the vehicle controller. Considering that the CAN bus erroneously feeds back a wake-up signal in an interference state, it will cause erroneous wake-up of the vehicle controller. Therefore, it is necessary to set the wake-up trigger duration of the vehicle controller. When the wake-up circuit obtains the wake-up signal feedback, it is determined whether to wake up the vehicle controller based on the set trigger duration. In this scheme, the first connector P1 is used to input the wake-up signal fed back by the CAN bus. The signal is integrated by the first resistor R1 and the first capacitor C1. With the integration of the first capacitor C1, the voltage at the end of the first capacitor C1 is fed back to the in-phase end of the sixth operational amplifier U6, and the power supply signal is fed back to the same phase end of the sixth operational amplifier U6 via the seventeenth resistor R17. , the eighteenth resistor R18 to the ground terminal loop, the eighteenth resistor R18 end is the wake-up trigger voltage, when the voltage at the first capacitor C1 end is greater than the wake-up trigger voltage, the output signal of the sixth operational amplifier U6 output end is connected to the ground terminal loop through the nineteenth resistor R19, and the voltage at the nineteenth resistor R19 end is fed back to the second connector P2 to confirm the correct wake-up signal output, and the CAN bus is in an interference state, and the feedback signal is input to the first capacitor C1 through the first connector P1 and the first resistor R1 and cannot reach the wake-up trigger voltage at the inverting end of the sixth operational amplifier U6, and the sixth operational amplifier U6 is cut off, and the interference signal that is subsequently fed back to the first capacitor C1 is discharged through the fourth resistor R4 loop.
[0023] Considering that when the CAN bus incorrectly feeds back a transiently stable wake-up signal under interference, the wake-up circuit will reach the wake-up trigger time, thereby incorrectly waking up the vehicle controller. Therefore, it is necessary to confirm the accuracy of the wake-up signal based on the wake-up signal threshold fed back by the CAN bus under normal working conditions to further prevent incorrect wake-up of the vehicle controller. In this scheme, the signal input by the first connector P1 is detected by the in-phase end of the second operational amplifier U2, and the fifth resistor R5, the second resistor R2, and the third resistor R3 are connected in series to provide a reference signal for the inverting end of the second operational amplifier U2 and the in-phase end of the first operational amplifier U1. The reference voltage of the first operational amplifier U1 is the lowest wake-up voltage of the wake-up signal threshold, and the reference voltage of the second operational amplifier U2 is the highest wake-up voltage of the wake-up signal threshold, ensuring an accurate range of the wake-up signal amplitude. When the CAN bus incorrectly feeds back a transiently stable wake-up signal under interference and the signal is higher than the highest wake-up voltage, the output signal of the second operational amplifier U2 is fed back to the base of the first transistor Q1 through the second diode D2, and the first capacitor C1 is released through the collector, emitter and ground loop of the first transistor Q1. voltage, and the first diode D1 is turned on. The first diode D1 is turned on, indicating that the current fault is a high threshold wake-up signal in a transient stable state. When the wake-up signal is at the lowest wake-up signal voltage, the first operational amplifier U1 outputs a signal through the tenth resistor R10 to the ground end loop. The signal at the tenth resistor R10 end is fed back to the base of the first transistor Q1 through the third diode D3. The voltage of the first capacitor C1 is released. At the same time, the second diode D2 is turned on. The second diode D2 is turned on, indicating that the current fault is a low threshold wake-up signal in a transient stable state. When the wake-up signal is within the reference voltage interval set by the first operational amplifier U1 and the second operational amplifier U2, and after integration by the first resistor R1 and the first capacitor C1, the sixth operational amplifier U6 can normally output the confirmed wake-up signal to the second connector P2. The ninth resistor R9 and the eighth resistor R8 are used for the third operational amplifier U3 in-phase terminal signal input. The output terminal of the third operational amplifier U3 is fed back to the inverting terminal after the sixth resistor R6 and the seventh resistor R7 loop. After adjusting the knob of the ninth resistor R9, the output voltage thereof is changed to change the reference voltage interval range to be compatible with different CAN bus voltage signals.
[0024] Taking into account that when the CAN bus erroneously feeds back an unstable wake-up signal in an interference state, the wake-up circuit will reach the wake-up trigger duration after a certain period of time in this state. Therefore, when the CAN bus feeds back an unstable wake-up signal, the signal needs to be filtered. In this scheme, the signal of the first connector P1 is fed back to the in-phase end of the fourth operational amplifier U4, and the output signal of the fourth operational amplifier U4 is fed back to the inverting end through the thirteenth resistor R13 and the fourteenth resistor R14 for proportional amplification, and then coupled through the second capacitor C2. When the signal of the first connector P1 is a normal wake-up signal output, the second capacitor C2 is coupled to the in-phase end of the fifth operational amplifier U5, and the output is stable with the fourth operational amplifier U4. The second capacitor C2 is decoupled through the fifteenth resistor R15. The fifth operational amplifier U5 first outputs and then cuts off as the second capacitor C2 changes. The eleventh resistor R11 is a pull-down resistor at the inverting end of the fifth operational amplifier U5. When the fifth operational amplifier U5 is cut off, the first connector P1 is connected to the inverting end of the fifth operational amplifier U5. The signal of the device P1 is fed back to the first capacitor C1 through the first resistor R1, outputted by the sixth operational amplifier U6, and fed back to the second connector P2 at the end of the nineteenth resistor R19. When the CAN bus incorrectly feeds back an unstable wake-up signal in an interference state, resulting in fluctuations, the fourth operational amplifier U4 is in a jump output with the floating state. When the second capacitor C2 is decoupled through the fifteenth resistor R15, the output of the fourth operational amplifier U4 causes the second capacitor C2 to be coupled to the in-phase end of the fifth operational amplifier U5, so that the fifth operational amplifier U5 always outputs. When the fifth operational amplifier U5 outputs, the signal passes through the twelfth resistor R12 to the ground end loop. The signal at the end of the twelfth resistor R12 is fed back to the base of the first transistor Q1 through the first diode D1. The voltage of the first capacitor C1 is released, and the third diode D3 is turned on at the same time. The conduction of the third diode D3 indicates that the current fault is a wake-up signal in an unstable state, so as to filter and warn the signal when an unstable wake-up signal is fed back in the interference state of the CAN bus.
[0025] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the equivalent elements of the claims be included in the invention. Any marking in a claim should not be considered as limiting the claim to which it relates.
Claims
1. A new energy vehicle controller wake-up circuit, characterized in that: The invention comprises a first resistor, a fourth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a sixth operational amplifier, a first capacitor, a first connector and a second connector, wherein one end of the first resistor is connected to the first connector, the other end of the first resistor is connected to one end of the fourth resistor, one end of the first capacitor and the in-phase end of the sixth operational amplifier, the inverting end of the sixth operational amplifier is connected to one end of the seventeenth resistor and one end of the eighteenth resistor, the other end of the seventeenth resistor is connected to a power supply, the output end of the sixth operational amplifier is connected to one end of the nineteenth resistor and the second connector, the other end of the fourth resistor, the other end of the eighteenth resistor, the other end of the nineteenth resistor, the other end of the first capacitor and the ground are connected.
2. The new energy vehicle controller wake-up circuit according to claim 1, characterized in that: It also includes a second resistor, a third resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first operational amplifier, a second operational amplifier, a third operational amplifier, a first triode, a second diode, and a third diode. One end of the ninth resistor is connected to a power supply, the other end of the ninth resistor is connected to one end of the eighth resistor and the same-phase end of the third operational amplifier, the inverting end of the third operational amplifier is connected to one end of the sixth resistor and one end of the seventh resistor, the output end of the third operational amplifier is connected to one end of the fifth resistor and the other end of the sixth resistor, the other end of the fifth resistor is connected to one end of the second resistor and the inverting end of the second operational amplifier The first operational amplifier is connected to the first connector, the second operational amplifier non-inverting end is connected to the second diode anode, the second diode cathode is connected to the third diode cathode and the first transistor base, the first transistor collector is connected to the first operational amplifier inverting end and the sixth operational amplifier non-inverting end, the first operational amplifier non-inverting end is connected to the other end of the second resistor and one end of the third resistor, the first operational amplifier output is connected to one end of the tenth resistor and the anode of the third diode, the other end of the third resistor, the other end of the seventh resistor, the other end of the eighth resistor, the other end of the tenth resistor, the emitter of the first transistor and the ground terminal are connected.
3. The new energy vehicle controller wake-up circuit according to claim 2, characterized in that: It also includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a fourth operational amplifier, a fifth operational amplifier, a second capacitor, and a first diode. The in-phase end of the fourth operational amplifier is connected to the first connector, the inverting end of the fourth operational amplifier is connected to one end of the thirteenth resistor, the output end of the fourth operational amplifier is connected to the other end of the thirteenth resistor, one end of the fourteenth resistor, and one end of the second capacitor, the in-phase end of the fifth operational amplifier is connected to one end of the fifteenth resistor and the other end of the second capacitor, the inverting end of the fifth operational amplifier is connected to one end of the eleventh resistor, the output end of the fifth operational amplifier is connected to one end of the twelfth resistor and the anode of the first diode, the cathode of the first diode is connected to the cathode of the second diode, and the other end of the eleventh resistor, the other end of the twelfth resistor, the other end of the fourteenth resistor, the other end of the fifteenth resistor and the ground are connected.
4. The new energy vehicle controller wake-up circuit according to claim 2, characterized in that: It also includes a first light emitting diode and a second light emitting diode. The anode of the first light emitting diode is connected to the output end of the second operational amplifier, the anode of the second light emitting diode is connected to the output end of the first operational amplifier, and the cathode of the first light emitting diode, the cathode of the second light emitting diode and the ground are connected.
5. The new energy vehicle controller wake-up circuit according to claim 3, characterized in that: It also includes a third light emitting diode, one end of the third light emitting diode is connected to the output end of the fifth operational amplifier, and the other end of the third light emitting diode is connected to the ground end.
6. The new energy vehicle controller wake-up circuit according to claim 1, characterized in that: The first capacitor is an adjustable capacitor.
7. The new energy vehicle controller wake-up circuit according to claim 1, characterized in that: The eighteenth resistor is an adjustable resistor.