Brake control system for a vehicle and vehicle

Abstract

This application discloses a vehicle braking control system and a vehicle, comprising: an input terminal of a power conversion circuit for connecting to a power battery; an output terminal of the power conversion circuit for connecting a main circuit battery and a first terminal of a protection module; the main circuit battery for connecting to the first terminal of the protection module; and a second terminal of the protection module for connecting to an auxiliary circuit battery. In the event of a short circuit in the power conversion circuit, the main circuit battery, or the auxiliary circuit battery, the protection module disconnects the main circuit battery from the auxiliary circuit battery. The main circuit battery is connected to a main controller, and the auxiliary circuit battery is connected to an auxiliary controller. The main controller is connected to a first brake and a second brake, and the auxiliary controller is connected to a third brake and a fourth brake. In the event of a fault, the protection module disconnects the main circuit battery from the auxiliary circuit battery to prevent the non-faulty battery from being short-circuited, allowing the normal battery to supply power to the corresponding controller and the corresponding brakes on both sides, effectively braking the vehicle and ensuring its safe operation.

Description

Technical Field

[0001] This application relates to the field of electric vehicle technology, specifically to a vehicle braking control system and a vehicle. Background Technology

[0002] With the development of vehicle intelligence, the demands for safety and intelligence in vehicle braking systems continue to increase. Currently, vehicles employ electro-mechanical braking (EMB), but since EMB relies entirely on batteries for power, it places higher demands on the vehicle's power supply redundancy. However, existing braking control systems have shortcomings; when certain malfunctions occur in the vehicle's braking system, it cannot effectively complete the braking operation, thus compromising vehicle safety. Utility Model Content

[0003] In view of this, this application provides a vehicle braking control system and a vehicle, which can effectively brake the vehicle and ensure the safe operation of the vehicle.

[0004] This application provides a vehicle braking control system, including: a power conversion circuit, a main circuit battery, an auxiliary circuit battery, a protection module, a main controller, and an auxiliary controller;

[0005] The input terminal of the power conversion circuit is used to connect to the power battery, and the output terminal of the power conversion circuit is connected to the main battery and the first terminal of the protection module. The main battery is connected to the first terminal of the protection module, and the second terminal of the protection module is connected to the auxiliary battery. When the power conversion circuit, the main battery, or the auxiliary battery is short-circuited, the protection module disconnects the connection between the main battery and the auxiliary battery.

[0006] The main battery is connected to the main controller, and the auxiliary battery is connected to the auxiliary controller.

[0007] The main controller is connected to the first and second brakes, and the auxiliary controller is connected to the third and fourth brakes.

[0008] Preferably, it further includes: a first CAN bus and a second CAN bus; the main controller is connected to the right front brake and the left rear brake, and the auxiliary controller is connected to the left front brake and the right rear brake; the main controller controls the right front brake, the left rear brake, the left front brake and the right rear brake through the first CAN bus or the second CAN bus; the auxiliary controller controls the right front brake, the left rear brake, the left front brake and the right rear brake through the first CAN bus or the second CAN bus.

[0009] Preferably, it further includes: a low-voltage battery sensor; the low-voltage battery sensor is connected to the main battery and the auxiliary battery, and is used to detect the voltage of the main battery and the voltage of the auxiliary battery; the low-voltage battery sensor also sends the voltage of the main battery and the voltage of the auxiliary battery to the protection module through the second CAN bus; the protection module is used to control the switch inside the protection module to disconnect the connection between the main battery and the auxiliary battery when the main battery or the auxiliary battery is short-circuited.

[0010] Preferably, it further includes: a high-voltage battery sensor; the high-voltage battery sensor is connected to the output terminal of the power conversion circuit and sends the output voltage of the power conversion circuit to the protection module through the second CAN bus; the protection module is used to control the switch inside the protection module to disconnect the connection between the main battery and the auxiliary battery when the power conversion circuit is short-circuited.

[0011] Preferably, the protection module includes a control circuit and a switch; the control circuit is used to connect the second CAN bus and the switch, and to control the switch operation according to the voltage sent by the second CAN bus.

[0012] Preferably, the control circuit is also used to disconnect the switch when the second CAN bus fails, and to determine whether a short circuit fault has occurred by measuring the voltage across the switch.

[0013] Preferably, the main controller is also configured to issue a fault indication if it does not receive a status signal from the auxiliary controller via the first CAN bus or the second CAN bus.

[0014] Preferably, the power conversion circuit is a step-down DC / DC circuit.

[0015] Preferably, the right front brake, left rear brake, left front brake, and right rear brake are all electromechanical brakes.

[0016] This application also provides a vehicle, characterized in that it includes a power battery and the braking control system of the vehicle described above.

[0017] As can be seen from the above technical solution, this application has the following beneficial effects:

[0018] The vehicle braking control system provided in this application includes: a power conversion circuit, a main circuit battery, an auxiliary circuit battery, a protection module, a main controller, and an auxiliary controller. When one of the power conversion circuit, the main circuit battery, or the auxiliary circuit battery is short-circuited, the protection module disconnects the main circuit battery and the auxiliary circuit battery to prevent the non-faulty battery from being short-circuited. This allows the normal battery to supply power to the corresponding controller and the corresponding brakes on both sides, enabling the braking control system to brake normally and thus ensuring the safe operation of the vehicle. Attached Figure Description

[0019] Figure 1A schematic diagram of a vehicle braking control system provided in an embodiment of this application;

[0020] Figure 2 A schematic diagram of another vehicle braking control system provided in an embodiment of this application;

[0021] Figure 3 A schematic diagram of another vehicle braking control system provided in an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of another vehicle braking control system provided in an embodiment of this application. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the embodiments of this application will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] See Figure 1 The figure is a schematic diagram of a vehicle braking control system provided in an embodiment of this application.

[0025] The vehicle braking control system provided in this application includes a power conversion circuit 101, a main battery 102, an auxiliary battery 103, a protection module 104, a main controller 105, and an auxiliary controller 106.

[0026] The input terminal of the power conversion circuit 101 is connected to the power battery, and the output terminal of the power conversion circuit 101 is connected to the main circuit battery 102 and the protection module 104. The main circuit battery 102 is connected to the auxiliary circuit battery 103 through the protection module 104. The power conversion circuit 101 is used to step down and rectify the high-voltage DC power from the power battery into low-voltage DC power to charge the main circuit battery 102 and to charge the auxiliary circuit battery 103 through the protection module 104. The protection module 104 is used to control the on / off state of the main circuit battery 102 and the auxiliary circuit battery 103 to ensure that at least one battery can supply power normally and the system can brake normally in the event of a braking system failure.

[0027] The main battery 102 is connected to the main controller 105, and the auxiliary battery 103 is connected to the auxiliary controller 106. The main controller 105 is connected to the first brake 107 and the second brake 109, and the auxiliary controller 106 is connected to the third brake 108 and the fourth brake 110.

[0028] The main battery 102 supplies power to the main controller 105, the first brake 107, and the second brake 109; the auxiliary battery 103 supplies power to the auxiliary controller 106, the third brake 108, and the fourth brake 110. The main controller 105 controls the braking of the first brake 107 and the second brake 109; the auxiliary controller 106 controls the braking of the third brake 108 and the fourth brake 110, and monitors the status of the main controller 105 in real time.

[0029] The four-sided brakes, including the left front brake, left rear brake, right front brake, and right rear brake, must be arranged in an X-type or II-type configuration to ensure the stability of the braking system. For example, if the first brake 107 is the right front brake, the second brake 109 can be the left rear brake, then the third brake 108 is the left front brake, and the fourth brake 110 is the right rear brake. The above brake arrangement is only an example; the specific arrangement can be set according to the actual needs of the scenario. The right front brake, left rear brake, and right rear brake are all electromechanical brakes.

[0030] Under normal operating conditions, the protection module 104 connects the main battery 102 and the auxiliary battery 103 in parallel, and simultaneously supplies power to the main controller 105, auxiliary controller 106, first brake 107, second brake 109, third brake 108, and fourth brake 110. The power conversion circuit 101 charges the main battery 102 and the auxiliary battery 103.

[0031] When the braking control system malfunctions, the protection module 104 disconnects the main battery 102 from the auxiliary battery 103 to ensure that at least the brakes on both sides can work normally and to ensure vehicle safety.

[0032] Specifically, in one possible fault scenario, if the power conversion circuit 101 or the main battery 102 short-circuits, the protection module 104 disconnects the main battery 102 from the auxiliary battery 103. The main controller 105, the first brake 107, and the second brake 109 will then malfunction. The auxiliary battery 103 will continue to supply power to the auxiliary controller 106, the third brake 108, and the fourth brake 110, ensuring normal braking by the third brake 108 and the fourth brake 110. The vehicle thus possesses emergency braking capability, ensuring vehicle safety.

[0033] In another possible fault scenario, the auxiliary battery 103 short-circuits, and the protection module 104 disconnects the main battery 102 from the auxiliary battery 103. The auxiliary controller 106, the third brake 108, and the fourth brake 110 cannot function properly. The main battery 102 continues to supply power to the main controller 105, the first brake 107, and the second brake 109, ensuring normal braking by the first brake 107 and the second brake 109. In this case, the power conversion circuit 101 only charges the main battery 102.

[0034] The vehicle braking control system provided in this application includes: a power conversion circuit, a main circuit battery, an auxiliary circuit battery, a protection module, a main controller, and an auxiliary controller. When one of the power conversion circuit, the main circuit battery, or the auxiliary circuit battery is short-circuited, the protection module disconnects the main circuit battery and the auxiliary circuit battery to prevent the non-faulty battery from being short-circuited. This allows the normal battery to supply power to the corresponding controller and the corresponding brakes on both sides, enabling the braking control system to brake normally and thus ensuring the safe operation of the vehicle.

[0035] In the vehicle braking control system provided in this application embodiment, the power conversion circuit can be a step-down DC / DC circuit, such as a Buck circuit. The auxiliary controller can be integrated into one side of the brake or exist independently of the four side brakes, but the auxiliary controller must ensure that the auxiliary battery can power the auxiliary controller during normal operation.

[0036] The braking control system provided in this application embodiment also includes a first CAN bus and a second CAN bus. Both the main controller 105 and the auxiliary controller 106 can control the first brake, the second brake, the third brake, and the fourth brake via either the first CAN bus or the second CAN bus. The first CAN bus and the second CAN bus are redundant.

[0037] For example, see Figure 2 The figure is a schematic diagram of another vehicle braking control system provided in an embodiment of this application.

[0038] The main controller 105 can be connected to the right front brake and the left rear brake, and the auxiliary controller 106 can be connected to the left front brake and the right rear brake. The main controller 105 controls the right front brake, the left rear brake, the left front brake, and the right rear brake via the first CAN bus or the second CAN bus; the auxiliary controller 106 controls the right front brake, the left rear brake, the left front brake, and the right rear brake via the first CAN bus or the second CAN bus.

[0039] Under normal operating conditions, the main controller 105 controls the right front brake, left rear brake, left front brake, and right rear brake via the first CAN bus.

[0040] When the main controller 105 malfunctions, such as when the main controller 105 is open-circuited, the auxiliary controller 106 detects the abnormal status of the main controller 105 through the first CAN bus and / or the second CAN bus. The auxiliary controller 106 controls the four brakes through the first CAN bus, and the system brakes normally. When the auxiliary controller 106 malfunctions, and the main controller does not receive a status signal from the auxiliary controller 106 through the first CAN bus and / or the second CAN bus, or receives a failure status signal actively sent by the auxiliary controller 106, the main controller 105 controls the four brakes through the first CAN bus and issues a fault warning to promptly alert the driver.

[0041] In the second possible fault scenario, if the main battery 102 or the auxiliary battery 103 fails, the power conversion circuit 101 will be unable to charge the faulty battery until the faulty battery is depleted. At this time, the other fault-free battery supplies power to the main controller 105, the auxiliary controller 106 and the four brakes separately, and the power conversion circuit 101 charges the fault-free battery to ensure normal braking of the system.

[0042] In the third possible fault scenario, the power conversion circuit 101 fails and cannot charge the main battery 102 and the auxiliary battery 103. In this case, the main battery 102 and the auxiliary battery 103 are connected in parallel and can still supply power to the main controller 105, the auxiliary controller 106 and the four brakes at the same time, and the system can still brake normally.

[0043] In the fourth possible fault scenario, if the first CAN bus fails, the main controller 105 receives signals from the four-side brakes and the auxiliary controller 106 via the second CAN bus. The main controller 105 then controls the four-side brakes via the second CAN bus, and the system brakes normally.

[0044] The braking control system provided in this application embodiment can control the four-side brakes via the main controller and the auxiliary controller through the first CAN bus or the second CAN bus. Therefore, when the braking control system malfunctions, at least one controller can still control the four-side brakes to ensure normal braking of the braking control system.

[0045] See Figure 3 This figure is a schematic diagram of another vehicle braking control system provided in an embodiment of this application.

[0046] The braking control system provided in this application embodiment also includes a low-voltage battery sensor 301.

[0047] The low-voltage battery sensor 301 is connected to the main battery 102 and the auxiliary battery 103.

[0048] The low-voltage battery sensor 301 is used to detect the voltage of the main battery 102 and the voltage of the auxiliary battery 103, and sends the voltage of the main battery 102 and the voltage of the auxiliary battery 103 to the protection module 104 via the second CAN bus.

[0049] When the main battery or the auxiliary battery is short-circuited, the low-voltage battery sensor 301 detects an abnormal voltage in the main battery 102 or the auxiliary battery 103, such as the voltage being lower or higher than the voltage threshold. The protection module 104 controls its internal switch 302 to disconnect the main battery 102 from the auxiliary battery 103 to prevent the normally functioning battery from being short-circuited by the short-circuited battery. This ensures that at least one battery can normally supply power to the corresponding controller and the corresponding brakes on both sides, allowing the braking control system to brake normally and ensuring vehicle safety.

[0050] See Figure 4 The figure is a schematic diagram of another vehicle braking control system provided in an embodiment of this application.

[0051] The braking control system provided in this application embodiment also includes a high-voltage battery sensor 401.

[0052] The high-voltage battery sensor 401 is connected to the output terminal of the power conversion circuit 101, and sends the output voltage of the power conversion circuit 101 to the protection module 104 via the second CAN bus. Therefore, when the power conversion circuit 101 is short-circuited, the high-voltage battery sensor 401 detects an abnormal voltage in the power conversion circuit 101, such as the voltage being lower or higher than the voltage threshold. The protection module 104 controls the switch 302 inside the protection module to disconnect the connection between the main battery 102 and the auxiliary battery 103, preventing the auxiliary battery 103 from short-circuiting and ensuring the normal braking of the braking control system.

[0053] The braking control system provided in this application embodiment has a battery sensor that detects the voltage of the corresponding device and sends it to the protection module via the second CAN bus. The protection module can promptly determine whether the detected voltage is abnormal, and determine whether the detected device has a short circuit fault. Then, it can promptly shut off its own switch, disconnect the main battery and the auxiliary battery, and ensure that at least one battery can normally supply power to the corresponding controller and the corresponding brakes on both sides, so that the braking control system can brake normally.

[0054] The protection module of the braking control system provided in this application embodiment includes a control circuit and a switch. The control circuit is connected to a second CAN bus and the switch. The control circuit can be implemented using a microcontroller. The switch can be a single-pole switch.

[0055] The control circuit is used to control the switch action according to the voltage sent by the second CAN bus. When the system fails and the voltage sent by the second CAN bus is abnormal, the connection between the main battery and the auxiliary battery is cut off in time to ensure that at least one battery can supply power to the corresponding controller and the corresponding brakes on both sides, so as to ensure that the braking control system has emergency braking capability.

[0056] The control circuit also functions to open the control switch in the event of a second CAN bus fault, detect the voltage across the switch, and determine whether a short circuit fault has occurred in the braking control system by comparing the voltage across the switch with a voltage threshold. If a short circuit fault occurs in the braking control system, the switch remains open to disconnect the main battery and auxiliary battery, ensuring normal braking operation. For example, if the voltage across the switch is lower than the voltage threshold after the switch is opened, it indicates a short circuit fault in the braking control system. In this case, the switch remains open to ensure that the battery on the non-faulty side can supply power to the corresponding controller and the corresponding brakes on both sides.

[0057] The braking control system provided in this application embodiment uses a protection module control circuit to detect whether the voltage at both ends after the switch is turned off, or whether the voltage detected by the low-voltage battery sensor and / or high-voltage battery sensor sent by the second CAN bus is abnormal, in order to determine whether the braking control system has malfunctioned, so as to control the switch to turn off and ensure that the braking control system can brake normally.

[0058] Based on the vehicle braking control system provided in the above embodiments, this application also provides a vehicle.

[0059] Since the vehicle includes a power battery and the braking control system described above, the vehicle's braking control system can promptly disconnect the main battery and auxiliary battery through the protection module in the event of a malfunction, so as to ensure that at least one battery is powered normally and the braking control system can brake normally, thus ensuring vehicle safety.

[0060] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0061] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A braking control system for a vehicle, characterized in that, include: Power conversion circuit, main circuit battery, auxiliary circuit battery, protection module, main controller and auxiliary controller; The input terminal of the power conversion circuit is used to connect to the power battery, and the output terminal of the power conversion circuit is connected to the main circuit battery and the first terminal of the protection module. The main circuit battery is connected to the first terminal of the protection module, and the second terminal of the protection module is connected to the auxiliary circuit battery. When the power conversion circuit is short-circuited, the main battery is short-circuited, or the auxiliary battery is short-circuited, the protection module disconnects the connection between the main battery and the auxiliary battery. The main battery is connected to the main controller, and the auxiliary battery is connected to the auxiliary controller; The main controller is connected to the first brake and the second brake, and the auxiliary controller is connected to the third brake and the fourth brake.

2. The braking control system according to claim 1, characterized in that, Also includes: The first CAN bus and the second CAN bus; the main controller is connected to the right front brake and the left rear brake, and the auxiliary controller is connected to the left front brake and the right rear brake; the main controller controls the right front brake, the left rear brake, the left front brake and the right rear brake through the first CAN bus or the second CAN bus; The auxiliary controller controls the right front brake, the left rear brake, the left front brake, and the right rear brake via the first CAN bus or the second CAN bus.

3. The braking control system according to claim 1, characterized in that, Also includes: Low-voltage battery sensor; The low-voltage battery sensor is connected to the main battery and the auxiliary battery, and is used to detect the voltage of the main battery and the voltage of the auxiliary battery; The low-voltage battery sensor also transmits the voltage of the main battery and the voltage of the auxiliary battery to the protection module via the second CAN bus; The protection module is used to control the switch inside the protection module to disconnect the connection between the main battery and the auxiliary battery when the main battery or the auxiliary battery is short-circuited.

4. The braking control system according to claim 1, characterized in that, Also includes: High-voltage battery sensor; The high-voltage battery sensor is connected to the output terminal of the power conversion circuit and sends the output voltage of the power conversion circuit to the protection module via the second CAN bus. The protection module is used to control the switch inside the protection module to disconnect the connection between the main battery and the auxiliary battery when the power conversion circuit is short-circuited.

5. The braking control system according to claim 3 or 4, characterized in that, The protection module includes a control circuit and a switch; The control circuit is used to connect the second CAN bus and the switch, and to control the operation of the switch according to the voltage sent by the second CAN bus.

6. The braking control system according to claim 5, characterized in that, The control circuit is also used to disconnect the switch when the second CAN bus fails, and to determine whether a short circuit fault has occurred by measuring the voltage across the switch.

7. The braking control system according to claim 2, characterized in that, The main controller is also configured to issue a fault warning if it does not receive a status signal from the auxiliary controller via the first CAN bus or the second CAN bus.

8. The braking control system according to any one of claims 1-3, characterized in that, The power conversion circuit is a step-down DC / DC circuit.

9. The braking control system according to claim 2, characterized in that, The right front brake, the left rear brake, the left front brake, and the right rear brake are all electromechanical brakes.

10. A vehicle, characterized in that, Includes a power battery and a braking control system for the vehicle as described in any one of claims 1-9.

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