Vehicle emergency stop circuit and automobile

Abstract

The invention discloses a vehicle sudden stop circuit and an automobile, relates to the technical field of vehicle sudden stop, and discloses a vehicle sudden stop circuit which comprises a detection circuit, a controller and an on-off circuit. The detection circuit is connected with the controller; the on-off circuit is respectively connected with the controller, the driving motor and the power battery; the detection circuit is used for transmitting a low-level signal to the controller when detecting that a vehicle is collided or a person in the vehicle performs emergency operation; the controller is used for outputting a cut-off signal to the on-off circuit when receiving the low-level signal; and the on-off circuit is used for disconnecting the connection between the power battery and the driving motor when receiving the cut-off signal.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle emergency stop, and in particular to a vehicle emergency stop circuit and a car. Background Art

[0002] At present, with the rise of new domestic automobile forces, the traditional new energy vehicle intelligent information detection is dazzling, new energy vehicles emerge in endlessly, and new energy vehicles are unmanned, which is completely dependent on vehicle-computer communication, program algorithms, and MCU. The most fatal is that the vehicle control system MCU is stuck, communication failure, program failure, runaway, etc. are common. The present invention uses a pure analog hardware logic digital control circuit to realize a vehicle emergency stop circuit that prevents new energy vehicles from losing control and stopping in an emergency when a collision occurs.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a vehicle emergency stop circuit and a vehicle, aiming to solve the technical problem of emergency stop when the vehicle loses control and crashes.

[0005] To achieve the above object, the present invention provides a vehicle emergency stop circuit, the vehicle emergency stop circuit comprising:

[0006] Detection circuit, controller and on-off circuit;

[0007] The detection circuit is connected to the controller; the on-off circuit is respectively connected to the controller, the drive motor and the power battery;

[0008] The detection circuit is used to transmit a low-level signal to the controller when detecting a collision of the vehicle or an emergency operation by a person in the vehicle;

[0009] The controller is used to output a cutoff signal to the on-off circuit when receiving the low level signal;

[0010] The on-off circuit is used to disconnect the power battery and the drive motor when receiving the cut-off signal.

[0011] Optionally, the detection circuit includes:

[0012] Pressure sensor, emergency stop button and XOR gate;

[0013] The XOR gate is connected to the pressure sensor, the emergency stop button and the controller respectively;

[0014] The pressure sensor is used to receive the vehicle body pressure value, and transmit the low level signal to the XOR gate when the vehicle body pressure value reaches a preset pressure value;

[0015] The pressure sensor is further used to transmit a high level signal to the XOR gate when the vehicle body pressure value is less than the preset pressure value;

[0016] The emergency stop button is used to receive a pressure trigger signal, and transmit the high level signal to the XOR gate when receiving the pressure trigger signal;

[0017] The XOR gate is used to transmit the low level signal to the controller when receiving the low level signal transmitted by the pressure sensor and the low level signal transmitted by the emergency stop button;

[0018] The XOR gate is further used to transmit the low level signal to the controller when receiving the high level signal transmitted by the pressure sensor and the high level signal transmitted by the emergency stop button.

[0019] Optionally, the emergency stop button is also used for:

[0020] When the pressure trigger signal is not received, the low level signal is transmitted to the XOR gate.

[0021] Optionally, the XOR gate is also used for:

[0022] When the high level signal transmitted by the pressure sensor and the low level signal transmitted by the emergency stop button are received, the high level signal is transmitted to the controller.

[0023] Optionally, the vehicle emergency stop circuit further includes:

[0024] MCU chip;

[0025] The MCU chip is connected to the power battery and the controller respectively;

[0026] The MCU chip is used to receive the voltage transmitted by the power battery, and transmit the low level signal to the controller when the voltage is less than a preset voltage threshold;

[0027] The MCU chip is also used to transmit the high level signal to the controller when the voltage is not less than the preset voltage threshold.

[0028] Optionally, the controller is further used for:

[0029] When the high level signal transmitted by the XOR gate and the high level signal transmitted by the MCU chip are received, a safety signal is transmitted to the on-off circuit.

[0030] Optionally, the controller includes:

[0031] AND gate;

[0032] The AND gate is connected to the XOR gate, the MCU chip and the on-off circuit respectively.

[0033] Optionally, the on-off circuit includes:

[0034] Multiple 24V isolated high-side switch circuits and multiple 48V isolated high-side switch circuits;

[0035] The multiple 24V isolated high-side switch circuits are connected to the power battery and the drive motor respectively;

[0036] The multiple 48V isolated high-side switch circuits are connected to the power battery and the drive motor respectively.

[0037] Optionally, the power battery includes:

[0038] Isolation power supply;

[0039] The isolated power supply is respectively connected to the MCU chip, the multiple 24V isolated high-side switch circuits and the multiple 48V isolated high-side switch circuits.

[0040] The present invention further provides a car, characterized in that the car comprises the vehicle emergency stop circuit.

[0041] One or more technical solutions proposed in the present invention have at least the following technical effects:

[0042] The present invention discloses a vehicle emergency stop circuit and a vehicle, and relates to the technical field of vehicle emergency stop. The invention discloses a vehicle emergency stop circuit, comprising: a detection circuit, a controller and an on-off circuit; the detection circuit is connected to the controller; the on-off circuit is respectively connected to the controller, a drive motor and a power battery; the detection circuit is used to transmit a low-level signal to the controller when detecting a collision of the vehicle or an emergency operation of a person in the vehicle; the controller is used to output a cut-off signal to the on-off circuit when receiving the low-level signal; the on-off circuit is used to disconnect the connection between the power battery and the drive motor when receiving the cut-off signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0045] Figure 1 It is a first structural schematic diagram of an embodiment of a vehicle emergency stop circuit of the present invention;

[0046] Figure 2 A second structural schematic diagram of an embodiment of a vehicle emergency stop circuit of the present invention;

[0047] Figure 3 A first circuit diagram of an embodiment of a vehicle emergency stop circuit of the present invention;

[0048] Figure 4 This is a structural diagram of the MCU chip of an embodiment of the vehicle emergency stop circuit of the present invention.

[0049] Description of Figure Numbers:

[0050] 1. Detection circuit; 2. Controller; 3. On-off circuit; 4. Power battery; 5. Drive motor; 6. MCU chip; 11. Pressure sensor; 12. Emergency stop button; 13. XOR gate; 21. AND gate; 31. Multiple 24V isolated high-side switch circuits; 32. Multiple 48V isolated high-side switch circuits; 41. Isolated power supply.

[0051] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0054] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0055] The invention provides a vehicle emergency stop circuit.

[0056] Reference Figure 1 , Figure 1 It is a first structural schematic diagram of an embodiment of a vehicle emergency stop circuit of the present invention.

[0057] In the first embodiment of the present invention, considering that the traditional vehicle emergency stop method completely relies on vehicle-computer communication, program algorithm, MCU, when the vehicle control system MCU is stuck, communication failure, program failure, runaway, etc., the vehicle cannot safely complete the emergency stop. In order to solve the above problems, the present invention proposes a vehicle emergency stop circuit, the vehicle emergency stop circuit includes: a detection circuit 1, a controller 2 and a switch circuit 3;

[0058] The detection circuit 1 is connected to the controller 2; the on-off circuit 3 is respectively connected to the controller 2, the drive motor 5 and the power battery 4;

[0059] The detection circuit 1 is used to transmit a low-level signal to the controller 2 when detecting a collision of the vehicle or an emergency operation by a person in the vehicle;

[0060] The controller 2 is used to output a cut-off signal to the on-off circuit 3 when receiving the low-level signal;

[0061] The on-off circuit 3 is used to disconnect the power battery 4 and the drive motor 5 when receiving the cut-off signal.

[0062] It should be noted that the power battery 4 may be a lithium-ion battery or a lithium iron phosphate battery, etc., which is not limited in this embodiment;

[0063] It should be noted that the drive motor 5 may be a permanent magnet synchronous motor or a switched reluctance motor, etc., which is not limited in this embodiment.

[0064] In a specific implementation, when the detection circuit 1 detects that the vehicle has collided or the occupant has performed an emergency operation, a low-level signal is transmitted to the controller 2. When the controller 2 receives the low-level signal, the controller 2 outputs a cutoff signal to the on-off circuit 3. When the on-off circuit 3 receives the cutoff signal, the connection between the power battery 4 and the drive motor 5 is disconnected. At this time, the vehicle's motor loses power so that the vehicle can complete an emergency stop.

[0065] This embodiment implements a vehicle emergency stop circuit to prevent new energy vehicles from losing control and stopping suddenly or from making an emergency stop in the event of a collision through a pure analog hardware logic digital control circuit. That is, when the traditional vehicle emergency stop method controlled by the MCU fails, the present invention can implement the vehicle emergency stop without relying on software and the MCU.

[0066] refer to Figure 2 , Figure 2 It is a second structural schematic diagram of an embodiment of a vehicle emergency stop circuit of the present invention.

[0067] Considering that when the vehicle control system MCU is stuck, communication fails, program fails, or the vehicle runs away, it is necessary to rely on a pure analog hardware logic digital control circuit to achieve the emergency stop of the vehicle. The detection circuit 1 includes: a pressure sensor 11, an emergency stop button 12, and an XOR gate 13;

[0068] The XOR gate 13 is connected to the pressure sensor 11, the emergency stop button 12 and the controller 2 respectively;

[0069] The pressure sensor 11 is used to receive the vehicle body pressure value, and transmit the low level signal to the XOR gate when the vehicle body pressure value reaches a preset pressure value;

[0070] The pressure sensor 11 is further used to transmit a high level signal to the XOR gate 13 when the vehicle body pressure value is less than the preset pressure value;

[0071] The emergency stop button 12 is used to receive a pressure trigger signal, and when receiving the pressure trigger signal, transmit the high level signal to the XOR gate 13;

[0072] The XOR gate 13 is used to transmit the low level signal to the controller 2 when receiving the low level signal transmitted by the pressure sensor 11 and the low level signal transmitted by the emergency stop button 12;

[0073] The XOR gate 13 is further used to transmit the low level signal to the controller when receiving the high level signal transmitted by the pressure sensor 11 and the high level signal transmitted by the emergency stop button 12 .

[0074] It should be noted that the pressure sensor 11 may be a medium pressure sensor or a high pressure sensor, etc., and this embodiment does not limit this.

[0075] It should be noted that the emergency stop button 12 may be a composite button or a lockable button, etc., which is not limited in this embodiment;

[0076] It should be noted that the XOR gate 13 may be a 74 series gate, etc., which is not limited in this embodiment.

[0077] It is understandable that when the XOR gate 13 receives one of the high-level signals and one of the low-level signals, it will transmit one of the high-level signals to other modules, and when the XOR gate 13 receives two of the high-level signals or two of the low-level signals, it will transmit one of the low-level signals to other modules.

[0078] In a specific implementation, the pressure sensor 11 first receives the vehicle body pressure value, and when the vehicle body pressure value reaches a preset pressure value, transmits the low level signal to the XOR gate 13, and when the vehicle body pressure value is less than the preset pressure value, transmits a high level signal to the XOR gate 13. The emergency stop button 12 is used to receive a pressure trigger signal, and when receiving the pressure trigger signal, transmits the high level signal to the XOR gate 13. The XOR gate 13 is used to transmit the low level signal to the controller 2 when receiving the low level signal transmitted by the pressure sensor 11 and the low level signal transmitted by the emergency stop button 12. The XOR gate 13 is also used to transmit the low level signal to the controller 2 when receiving the high level signal transmitted by the pressure sensor 11 and the high level signal transmitted by the emergency stop button 12.

[0079] In this embodiment, when the vehicle is in the normal driving process, the pressure sensor 11 normally sends the high level signal to the XOR gate 13 and the emergency stop button 12 is not triggered and normally sends the low level signal to the XOR gate 13. After the vehicle collides, the pressure sensor 11 immediately transmits the low level signal to the XOR gate 13. Because many uncontrollable factors will appear when the vehicle collides, such as the driver being frightened or fainting, the driver cannot normally control the vehicle to brake. At this time, the XOR gate 13 will transmit the low level signal to the controller 2. When the emergency stop button 12 of the vehicle is triggered, the emergency stop button 12 immediately transmits the high level signal to the XOR gate 13. In reality, when the driver finds out in advance that the vehicle may collide, etc., he presses the emergency stop button 12 in advance. At this time, the XOR gate 13 will transmit the low level signal to the controller 2.

[0080] refer to Figure 3 , Figure 3 This is a first circuit diagram of an embodiment of a vehicle emergency stop circuit of the present invention.

[0081] Since the emergency stop button 12 is not triggered when the vehicle is driving normally, the emergency stop button 12 is also used to transmit the low level signal to the XOR gate 13 when the pressure trigger signal is not received.

[0082] In a specific implementation, in order to ensure the response speed of the vehicle emergency stop, the emergency stop button 12 will continue to transmit the low-level signal to the XOR gate 13 even when it is not triggered.

[0083] Since the XOR gate 13 needs to ensure that the on-off circuit 3 remains on at all times when the vehicle is driving normally, the XOR gate 13 is also used to transmit the high level signal to the controller 2 when receiving the high level signal transmitted by the pressure sensor 11 and the low level signal transmitted by the emergency stop button 12.

[0084] In a specific implementation, in order to ensure the response speed of the vehicle emergency stop, the XOR gate 13 will continue to transmit the high level signal to the controller 2.

[0085] refer to Figure 4 , Figure 4 This is a structural diagram of the MCU chip of an embodiment of the vehicle emergency stop circuit of the present invention.

[0086] When a conventional vehicle performs an emergency stop operation while driving, the emergency stop operation is generally performed by the MCU chip 6, so the vehicle emergency stop circuit further includes: an MCU chip 6;

[0087] The MCU chip 6 is connected to the power battery 4 and the controller 2 respectively;

[0088] The MCU chip 6 is used to receive the voltage transmitted by the power battery 4, and transmit the low level signal to the controller 2 when the voltage is less than a preset voltage threshold;

[0089] The MCU chip 6 is further configured to transmit the high level signal to the controller 2 when the voltage is not less than the preset voltage threshold.

[0090] It should be noted that the MCU chip 6 may be GD32F103CBT6 or the like, which is not limited in this embodiment.

[0091] In a specific implementation, the MCU chip 6 is used to receive the voltage transmitted by the power battery 4, and transmit the low-level signal to the controller 2 when the voltage is less than the preset voltage threshold; the MCU chip 6 is also used to transmit the high-level signal to the controller 2 when the voltage is not less than the preset voltage threshold.

[0092] This embodiment uses the traditional MCU chip 6 to control the vehicle emergency stop operation under normal circumstances. Therefore, when the vehicle is driving normally, the voltage received by the MCU chip 6 is not less than the preset voltage threshold. When the MCU chip 6 is abnormal, the MCU chip 6 will not be able to participate in the vehicle's emergency stop operation. At this time, the voltage received by the MCU chip 6 is less than the preset voltage threshold, so the MCU chip 6 will transmit the low-level signal to the controller 2.

[0093] Since the controller 2 needs to ensure that the on-off circuit 3 remains on at all times when the vehicle is driving normally, the controller 2 is also used to transmit a safety signal to the on-off circuit 3 when receiving the high-level signal transmitted by the XOR gate 13 and the high-level signal transmitted by the MCU chip 6.

[0094] In a specific implementation, when the XOR gate 13 and the MCU chip 6 both transmit the high-level signal to the controller 2, the controller 2 will transmit the safety signal to the on-off circuit 3, thereby ensuring safe driving of the vehicle under normal circumstances.

[0095] In order to ensure that the various systems in the vehicle can respond quickly when the vehicle encounters a situation requiring an emergency stop, the controller 2 will continuously transmit a safety signal to the on-off circuit 3 to ensure conduction between the power battery 4 and the drive motor 5, and the power battery 4 can normally supply power to the drive motor 5.

[0096] In order to ensure continuous and safe signal transmission between various electronic components, the controller 2 includes: an AND gate 21; the AND gate 2 is respectively connected to the XOR gate 13, the MCU chip 6 and the on-off circuit 3.

[0097] It should be noted that the AND gate may be a 74HC08 logic AND gate, etc., and this embodiment does not impose any limitation on this.

[0098] In a specific implementation, the AND gate 21 is respectively connected to the XOR gate 13, the MCU chip 6 and the on-off circuit 3, and can quickly determine whether the on-off circuit 3 needs to be disconnected through the high level or the low level.

[0099] In order to ensure that the vehicle can respond quickly when an emergency stop is required, the on-off circuit includes: multiple 24V isolated high-side switch circuits 31 and multiple 48V isolated high-side switch circuits 32;

[0100] The multi-channel 24V isolated high-side switch circuit 31 is connected to the power battery 4 and the drive motor 5 respectively;

[0101] The multi-channel 48V isolated high-side switch circuit 32 is connected to the power battery 4 and the drive motor 5 respectively.

[0102] In a specific implementation, if the multiple 24V isolated high-side switch circuits 31 and the multiple 48V isolated high-side switch circuits 32 receive the safety signal, the connection between the power battery 4 and the drive motor 5 will be maintained continuously; if the multiple 24V isolated high-side switch circuits 31 and the multiple 48V isolated high-side switch circuits 32 receive the cut-off signal, the connection between the power battery 4 and the drive motor 5 will be immediately cut off, and the power battery 4 will stop supplying power to the drive motor 5.

[0103] In order to ensure safe and continuous power supply to the drive motor 5 and rapid and accurate response of each module in the vehicle emergency stop circuit, the power battery 4 includes: an isolated power supply 41;

[0104] The isolated power supply 41 is connected to the MCU chip 6 , the multiple 24V isolated high-side switch circuits 31 , and the multiple 48V isolated high-side switch circuits 32 , respectively.

[0105] It should be noted that the isolated power supply 41 may be an on-board charger, or an isolated gate driver, etc., which is not limited in this embodiment.

[0106] In a specific implementation, the isolated power supply 41 is respectively connected to the MCU chip 6, the multiple 24V isolated high-side switch circuits 31 and the multiple 48V isolated high-side switch circuits 32 to provide a guarantee for safe power supply to each module in the system.

[0107] In addition, to achieve the above object, the present invention also provides a car, the car includes the vehicle emergency stop circuit as described above. Other embodiments or specific implementations of the present invention can refer to the embodiments of the vehicle emergency stop circuit, which will not be repeated here.

[0108] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A vehicle emergency stop circuit, characterized in that: The vehicle emergency stop circuit comprises: Detection circuit, controller and on-off circuit; The detection circuit is connected to the controller; the on-off circuit is respectively connected to the controller, the drive motor and the power battery; The detection circuit is used to transmit a low-level signal to the controller when detecting a collision of the vehicle or an emergency operation by a person in the vehicle; The controller is used to output a cut-off signal to the on-off circuit when receiving the low-level signal; The on-off circuit is used to disconnect the power battery and the drive motor when receiving the cut-off signal.

2. The vehicle emergency stop circuit according to claim 1, characterized in that: The detection circuit comprises: Pressure sensor, emergency stop button and XOR gate; The XOR gate is connected to the pressure sensor, the emergency stop button and the controller respectively; The pressure sensor is used to receive the vehicle body pressure value, and transmit the low level signal to the XOR gate when the vehicle body pressure value reaches a preset pressure value; The pressure sensor is further used to transmit a high level signal to the XOR gate when the vehicle body pressure value is less than the preset pressure value; The emergency stop button is used to receive a pressure trigger signal, and transmit the high level signal to the XOR gate when receiving the pressure trigger signal; The XOR gate is used to transmit the low level signal to the controller when receiving the low level signal transmitted by the pressure sensor and the low level signal transmitted by the emergency stop button; The XOR gate is further used to transmit the low level signal to the controller when receiving the high level signal transmitted by the pressure sensor and the high level signal transmitted by the emergency stop button.

3. The vehicle emergency stop circuit according to claim 2, characterized in that: The emergency stop button is also used to: When the pressure trigger signal is not received, the low level signal is transmitted to the XOR gate.

4. The vehicle emergency stop circuit according to claim 3, characterized in that: The XOR gate is also used to: When the high level signal transmitted by the pressure sensor and the low level signal transmitted by the emergency stop button are received, the high level signal is transmitted to the controller.

5. The vehicle emergency stop circuit according to claim 4, characterized in that: The vehicle emergency stop circuit also includes: MCU chip; The MCU chip is connected to the power battery and the controller respectively; The MCU chip is used to receive the voltage transmitted by the power battery, and transmit the low level signal to the controller when the voltage is less than a preset voltage threshold; The MCU chip is also used to transmit the high level signal to the controller when the voltage is not less than the preset voltage threshold.

6. The vehicle emergency stop circuit according to claim 5, characterized in that: The controller is also used for: When the high level signal transmitted by the XOR gate and the high level signal transmitted by the MCU chip are received, a safety signal is transmitted to the on-off circuit.

7. The vehicle emergency stop circuit according to claim 6, characterized in that: The controller comprises: AND gate; The AND gate is connected to the XOR gate, the MCU chip and the on-off circuit respectively.

8. The vehicle emergency stop circuit according to claim 5, characterized in that: The on-off circuit comprises: Multiple 24V isolated high-side switch circuits and multiple 48V isolated high-side switch circuits; The multiple 24V isolated high-side switch circuits are connected to the power battery and the drive motor respectively; The multiple 48V isolated high-side switch circuits are connected to the power battery and the drive motor respectively.

9. The vehicle emergency stop circuit according to claim 8, characterized in that: The vehicle emergency stop circuit also includes: Isolation power supply; The isolated power supply is respectively connected to the MCU chip, the multiple 24V isolated high-side switch circuits and the multiple 48V isolated high-side switch circuits.

10. An automobile, characterized in that: The automobile comprises the vehicle emergency stop circuit according to any one of claims 1 to 9.

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