New energy automobile parking control system and automobile

Abstract

The utility model discloses a parking control system for a new energy automobile. The parking control system comprises a parking switch connected with an Onebox; the Onebox is connected to an EPB right caliper brake assembly through a first H-bridge circuit; the Onebox is connected to the EPB left caliper brake assembly through a second H-bridge circuit; the domain controller is connected to the EPB left caliper brake assembly or the EPB right caliper brake assembly through a third H-bridge circuit; the domain controller communicates with the Onebox through a CAN (Controller Area Network) and is used for acquiring a fault signal of the EPB; a relay is connected in series between the first H-bridge circuit and the EPB right caliper brake assembly or between the second H-bridge circuit and the EPB left caliper brake assembly; and the output end of the domain controller is connected to the control end of the relay. The parking device has the advantages of being simple in structure, low in cost, capable of reducing parking cost and suitable for the new energy automobile without a p-gear lock.

Description

Technical Field

[0001] The utility model relates to the field of automobile parking control, and in particular to a new energy automobile parking control system and a new energy automobile that cancels a P gear lock. Background Art

[0002] With the popularization of new energy electric vehicles and the development of technology, cost control requirements are becoming more and more stringent. Compared with fuel vehicles, electric vehicles with existing technologies are gradually canceling the P gear lock. New energy vehicles without mechanical parking locks or parking backup functions cannot meet safety requirements and cannot meet regulatory requirements. Hybrid vehicle gearboxes all achieve the purpose of cost reduction by canceling the P gear lock, but this requires the development of a dual-control EPB to drive and control the parking of the vehicle. A dedicated external dual-control EPB controller is commonly used to achieve parking control. Although the dual-control EPB controller can solve the parking safety problem after canceling the P gear lock, the cost of a single vehicle has increased significantly due to the high cost of the dual-control PEB controller. This has led to the cost reduction brought by the cancellation of the P gear lock being offset by the addition of an external dual-control EPB controller, resulting in the failure to meet the purpose of cost reduction. Therefore, the solution of using a dual-control EPB controller for parking control after canceling the P gear lock cannot meet the cost reduction needs and is not the optimal solution.

[0003] For example, the dual redundant EPB system parking force control method and dual redundant EPB system with patent application number CN202211164385.6 discloses a dual-control EPB parking system, which cannot solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a new energy vehicle parking control system and a vehicle, which are used to realize reliable parking control of new energy vehicles with the P gear lock canceled, and meet the requirements of parking control and fault backup.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a parking control system for a new energy vehicle, comprising Onebox and a domain controller, wherein a parking switch is connected to the Onebox; the Onebox is connected to the EPB right caliper brake assembly through a first H-bridge circuit; the Onebox is connected to the EPB left caliper brake assembly through a second H-bridge circuit; the domain controller is connected to the EPB left caliper brake assembly or the EPB right caliper brake assembly through a third H-bridge circuit; the domain controller and the Onebox communicate via CAN to obtain a fault signal of the EPB; a relay is serially arranged between the first H-bridge circuit and the EPB right caliper brake assembly or the second H-bridge circuit and the EPB left caliper brake assembly; the output end of the domain controller is connected to the control end of the relay.

[0006] The parking switch is an EPB hard-wire switch or a vehicle-mounted large-screen soft switch.

[0007] The domain controller is connected to the gear position acquisition unit and is used to obtain the gear position signal of the vehicle.

[0008] The domain controller is connected to the vehicle-mounted reminder module and is used to send a reminder signal through the vehicle-mounted reminder module after the domain controller executes the parking function.

[0009] The vehicle-mounted reminder module includes a vehicle-mounted instrument and a vehicle-mounted display screen.

[0010] The Onebox and the domain controller work in a master-slave mode, wherein the Onebox is the master controller and the domain controller is the slave controller.

[0011] The relay is a double-pole double-throw relay.

[0012] A car comprises the parking control system.

[0013] The advantages of the utility model are: simple structure, low cost, can reduce the cost of parking, suitable for new energy vehicles that cancel the P gear lock; use of domain controller and Onebox to realize the dual control function of parking control, can effectively ensure safe and reliable parking, and has the purpose of saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0015] Figure 1 This is the structural principle diagram of this parking control system. DETAILED DESCRIPTION

[0016] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0017] The main purpose of this embodiment is to adopt a new parking control system architecture to achieve low-cost parking requirements and meet regulatory requirements, while also having the purpose of dual redundant backup control, solving the problems of safe and reliable parking. At the same time, the components used are those inside the vehicle, and some components are reused, achieving further cost reduction.

[0018] like Figure 1As shown in the figure, a parking control system for new energy vehicles includes Onebox and a domain controller. Onebox is the abbreviation of the wire control brake system, which has the function of braking control. The core controller inside it can be reused as the main controller for parking control, and the domain controller is used as the auxiliary controller for backup control. The two together achieve the purpose of dual control backup redundancy, thereby saving costs. Its specific architecture is as follows Figure 1 As shown, the parking switch is connected to the Onebox; the Onebox is connected to the EPB right caliper brake assembly through the first H-bridge circuit; the Onebox is connected to the EPB left caliper brake assembly through the second H-bridge circuit; the domain controller is connected to the EPB left caliper brake assembly or the EPB right caliper brake assembly through the third H-bridge circuit; the domain controller and the Onebox communicate through CAN to obtain the fault signal of the EPB; a relay is connected in series between the first H-bridge circuit and the EPB right caliper brake assembly or the second H-bridge circuit and the EPB left caliper brake assembly; the output end of the domain controller is connected to the control end of the relay.

[0019] exist Figure 1 In the example, the first, second, and third H-bridge circuits are all drive circuits composed of MOS tubes, which are used to drive the motors in the left and right caliper brake assemblies of the EPB, and drive the clamping and release of the calipers by driving the motors to rotate. The first and second H-bridges can be integrated in the onebox; the third H-bridge is integrated in the domain controller, and of course it can also be realized through external means according to actual needs.

[0020] The parking switch is an EPB hard-wired switch or a vehicle-mounted large-screen soft switch, which is set in the car in the form of a physical switch or button, or a virtual soft switch is integrated in the vehicle's host touch screen or audio-visual entertainment screen to achieve the purpose of the parking switch.

[0021] The domain controller, Onebox and gear acquisition unit are connected to obtain the gear signal of the vehicle. The gear acquisition unit can be some controllers in the vehicle that store gears, such as a transmission controller, a vehicle controller, etc. Of course, the CAN bus module can be directly used to implement the gear acquisition unit. The CAN bus module is a CAN transceiver. It is connected to the vehicle CAN network to read CAN signals, so that the gear information in the vehicle CAN network can be directly read.

[0022] The domain controller is connected to the vehicle reminder module, which is used to send a reminder signal through the vehicle reminder module after the domain controller executes the parking function. The vehicle reminder module includes a variety of in-vehicle methods such as vehicle instruments and vehicle display screens. It is mainly to remind users that the backup domain controller is used to execute parking at this time, reminding users that there may be problems or failures in the onebox, so as to facilitate users to repair and handle it in time. Since the Onebox and the domain controller in this solution work in the master-slave mode, in which the Onebox is the master controller and the domain controller is the slave controller. The main controller Onebox performs parking control. When the vehicle is complete, the domain controller is not working. When it is abnormal, unable to park, and unable to control the caliper, it will send a fault status to be obtained by the domain controller through the CAN network. At this time, the domain controller starts working and controls the action of the left caliper brake assembly connected to it to perform auxiliary parking control, so that the auxiliary controller domain controller can park normally when the main controller fails or is abnormal, thereby improving the safety of parking.

[0023] This embodiment also provides a car, which adopts the parking control system in the above embodiment to perform parking control and thus has all the advantages of the above parking control system.

[0024] The specific working principle of the scheme of this embodiment is described in detail below: The Onebox used in this scheme is a Onebox with hardware that has the ability to integrate a single-control EPB and a domain controller for the entire vehicle; since these two components are low-cost and are vehicle-mounted components, they can be functionally reused, further reducing costs. The dual-control EPB function can be achieved by integrating PBC with the Onebox (the hardware has the ability to integrate a single-control EPB) and combining it with other controllers that only need to integrate the EPB backup function. On the one hand, this scheme provides a solution for Onebox or ESC manufacturers whose hardware does not currently have the ability to integrate a dual-control EPB to meet the OEM's need to reduce costs by canceling the P gear lock, while also avoiding the risk of being eliminated by the OEM; on the other hand, the cost is more advantageous than that of Onebox (the hardware has the ability to integrate a dual-control EPB), meeting the OEM's need to reduce costs and ensuring that product prices are more competitive.

[0025] like Figure 1 As shown, a new type of integrated dual-control EPB control system includes a controller assembly Onebox, a domain controller assembly, an EPB switch, and EPB left and right caliper brake assemblies; the controller assembly Onebox as the EPB main controller has all EPB functions; the domain controller assembly as the auxiliary controller has EPB backup function; the EPB switch is hard-wired to Onebox or the large-screen soft switch establishes communication with Onebox; the EPB left and right caliper brake assemblies, wherein the EPB right caliper brake assembly is directly connected to the Onebox, and the EPB left caliper brake assembly is connected to the Onebox via the domain controller.

[0026] The controller assembly Onebox and the domain controller assembly establish data communication through the CAN network; the controller assembly Onebox acts as the EPB main controller to control the EPB caliper operation and can respond to the following requests: EPB hard switch, large screen soft switch and gear position signal. The domain controller assembly acts as an auxiliary controller to control the EPB caliper operation request and only responds to the gear position signal;

[0027] When the controller assembly Onebox cannot control the calipers on both sides to complete the parking function, the Onebox sends a parking backup start signal, and the domain controller takes over passively as a failover; the domain controller loses communication with the Onebox, and the caliper is in a non-Applied state, and the domain controller takes over actively as a failover; the domain controller controls the motor drive circuit using a double-pole double-throw relay, and the Onebox and the EPB left caliper brake assembly keep the line open in normal conditions. If the domain controller takes over, the line will only be disconnected when the domain controller assembly controls the caliper to move, but after the control of the EPB left caliper brake assembly completes parking or release, the line will be restored and kept open, which is conducive to the timely restoration of the control of the EPB left caliper after the fault is eliminated; the controller assembly Onebox is the main controller of the EPB. When it functions normally, the left and right caliper brake assemblies of the EPB are controlled by the main controller and only respond to the control of the main controller, and the domain controller does not participate in the control.

[0028] exist Figure 1 In the system, the controller assembly Onebox serves as the EPB main controller with full EPB functions, wherein the EPB right caliper brake assembly is directly connected to the Onebox, and the EPB left caliper brake assembly is connected to the Onebox via the domain controller; the domain controller assembly serves as an auxiliary controller with EPB backup function, and only controls the EPB left caliper.

[0029] The controller assembly Onebox is connected to the EPB left caliper motor hard line through the domain controller. Figure 1 As shown, the domain controller controls the motor drive circuit using a double-pole double-throw relay, which keeps the Onebox and the EPB left caliper brake assembly connected in normal conditions. If the domain controller takes over, the line will be disconnected only when the domain controller assembly controls the caliper to move, but after the EPB left caliper brake assembly is controlled to complete parking or release, the line will be restored to keep it connected, which is conducive to timely recovery of control over the EPB left caliper after the Onebox fault is eliminated.

[0030] The controller assembly Onebox and the domain controller assembly establish data communication through the CAN network. If the domain controller loses communication with the Onebox and the caliper is in a non-Applied state, the domain controller takes over actively as a failover; if the controller assembly Onebox cannot control the calipers on both sides to complete the parking function, the Onebox sends a request for a parking backup start signal, and the domain controller takes over passively as a failover. The domain controller controls the EPB left caliper to work according to the gear position signal. P gear parking function: When the gear is switched from other gears to P gear, the double-pole double-throw relay is disconnected, and the motors on both sides are controlled to rotate forward until they stop at the set clamping force, and the double-pole double-throw relay resumes to keep the line normally connected; gear shift release function: When the gear changes from P gear to non-P gear, the double-pole double-throw relay is disconnected, and the motors on both sides are controlled to reverse, until they stop at the set idle travel gap, and the double-pole double-throw relay resumes to keep the line normally connected.

[0031] As the main controller of EPB, the controller assembly Onebox has all the functions of EPB. When the functions are normal, it can control the left and right caliper brake assemblies of EPB to complete the caliper parking or release action according to the EPB hard switch, large screen soft switch and gear signal request. Under normal circumstances, the Onebox and the left caliper brake assembly of EPB keep the line connected, so the domain control does not participate in the control.

[0032] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A parking control system for a new energy vehicle, characterized in that: It includes Onebox and a domain controller, wherein a parking switch is connected to the Onebox; the Onebox is connected to the EPB right caliper brake assembly through a first H-bridge circuit; the Onebox is connected to the EPB left caliper brake assembly through a second H-bridge circuit; the domain controller is connected to the EPB left caliper brake assembly or the EPB right caliper brake assembly through a third H-bridge circuit; the domain controller and the Onebox communicate through CAN to obtain a fault signal of the EPB; a relay is serially connected between the first H-bridge circuit and the EPB right caliper brake assembly or the second H-bridge circuit and the EPB left caliper brake assembly; the output end of the domain controller is connected to the control end of the relay.

2. A parking control system for a new energy vehicle as claimed in claim 1, characterized in that: The parking switch is an EPB hard-wire switch or a vehicle-mounted large-screen soft switch.

3. A parking control system for a new energy vehicle as claimed in claim 1, characterized in that: The domain controller is connected to the gear position acquisition unit and is used to obtain the gear position signal of the vehicle.

4. The parking control system for a new energy vehicle according to any one of claims 1 to 3, characterized in that: The domain controller is connected to the vehicle-mounted reminder module and is used to send a reminder signal through the vehicle-mounted reminder module after the domain controller executes the parking function.

5. The parking control system for a new energy vehicle as claimed in claim 4, characterized in that: The vehicle-mounted reminder module includes a vehicle-mounted instrument and a vehicle-mounted display screen.

6. The parking control system for a new energy vehicle according to any one of claims 1 to 3, characterized in that: The Onebox and the domain controller work in a master-slave mode, wherein the Onebox is the master controller and the domain controller is the slave controller.

7. The parking control system for a new energy vehicle according to any one of claims 1 to 3, characterized in that: The relay is a double-pole double-throw relay.

8. A car, characterized in that: The automobile comprises a parking control system as claimed in any one of claims 1-7.

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