BCS control method under energy recovery working condition based on ABS configuration
Through communication with the energy recovery module and BCS action response of the ABS and the energy recovery control module under the sliding energy recovery conditions, the problem that electric vehicles cannot effectively trigger the ABS activation status position during the sliding energy recovery process is solved, and the dynamic response of energy recovery torque and the improvement of vehicle safety is achieved.
Patent Information
- Application Number
- CN202510283052.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2025-06-20
AI Technical Summary
The existing electric vehicles equipped with ABS controller cannot effectively trigger the ABS activation status bit during the gliding energy recovery process, resulting in the energy recovery module being unable to receive the exit command when the wheel is locked, which poses a safety hazard.
In the sliding energy recovery condition, the ABS detects the vehicle condition and communicates with the energy recovery control module. The energy recovery control module responds to the BCS operation, calculates the maximum torque value currently allowed to be recovered as the upper limit of the constraint, and switches the energy recovery torque interface through bus communication, responding to the torque command issued by the BCS.
It realizes dynamic response of energy recovery torque when the slip rate is abnormal in the state of sliding energy recovery, improving the safety of the vehicle in abnormal situations, ensuring that the vehicle can respond quickly during braking and gliding energy recovery.
Smart Images
Figure CN120171306A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of automobiles, and particularly relates to a BCS control method under energy recovery conditions based on ABS configuration. Background Art
[0002] In the process of implementing the present invention, the inventors found that the prior art has at least the following problems:
[0003] For existing electric vehicles equipped with an ABS controller, when wheel slip occurs, the ABS activation status bit is sent to the energy recovery control module, and the energy recovery control module immediately exits energy recovery after receiving the activation status bit to ensure vehicle safety.
[0004] Energy recovery includes braking energy recovery and coasting energy recovery. In traditional strategies based on ABS configuration, only when the brake is depressed can the ABS activation signal be triggered, that is, during braking energy recovery, vehicle safety is ensured. However, during coasting energy recovery, the brake pedal is not depressed, and the ABS activation status bit cannot be triggered under any conditions. Therefore, even if wheel lock occurs, the energy recovery module cannot receive an energy recovery exit command, creating a safety hazard.
[0005] CN118269696A - Vehicle Torque Control Method, Device and Vehicle discloses a vehicle torque control method, device and vehicle. The method includes: when the vehicle is in an energy recovery condition, determining a first motor torque exit slope according to the vehicle mass, road surface adhesion coefficient and minimum exit time, and / or determining a second motor torque exit slope according to the vehicle mass and vehicle deceleration change rate; it also cannot solve the above technical problems. Summary of the Invention
[0006] The technical problem to be solved by the present invention is a BCS control method under energy recovery conditions based on ABS configuration.
[0007] To solve the above technical problem, the technical solution adopted by the present invention is: a BCS control method under energy recovery conditions based on ABS configuration, including the following steps:
[0008] 1) Under coasting energy recovery conditions, the ABS detects the vehicle condition and communicates with the energy recovery control module;
[0009] 2) The energy recovery control module responds to the BCS action;
[0010] 3) The energy recovery module calculates the maximum torque value allowed to be recovered currently as the constraint upper limit.
[0011] In the above step 1), when the ABS detects an abnormal wheel slip rate, it sends a signal to the energy recovery control module through bus communication.
[0012] In the above step 2), after receiving the abnormal state of the wheel slip ratio, the energy recovery control module switches the energy recovery torque interface and responds to the torque command issued by the BCS.
[0013] In the above step 3), the energy recovery module calculates the maximum torque value allowed to be recovered currently based on the high-voltage component state, SOC, and vehicle speed as the constraint upper limit, so that when the slip ratio is abnormal in the coasting energy recovery state, the recovery torque can respond dynamically.
[0014] In the above step 3), the energy recovery control module continuously sends the upper limit value of the allowed energy recovery torque.
[0015] In the above step 3), the ABS continuously monitors the slip ratio and sends an activation flag bit.
[0016] In the above step 3), when the slip ratio flag bit is activated, the energy recovery control module switches the torque interface and responds to the BCS request torque.
[0017] In the above step 3), after the slip ratio activation flag bit exits, the energy recovery control module no longer responds to the BCS request torque and switches to the normal coasting energy recovery torque interface.
[0018] One of the technical solutions in the above technical solutions has the following advantages or beneficial effects. The BCS control function is realized based on the ABS, covering the control of the torque when the slip ratio is abnormal in the coasting energy recovery condition, ensuring the safety of the vehicle. Description of the Drawings
[0019] Figure 1 It is a schematic diagram of the BCS control method under the energy recovery condition based on the ABS configuration provided in the embodiment of the present invention. Detailed Embodiments
[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0021] See Figure 1 , a BCS control method under the energy recovery condition based on the ABS configuration, including the following steps: 1) Under the coasting energy recovery condition, the ABS detects the vehicle condition and communicates with the energy recovery control module; 2) The energy recovery control module responds to the BCS action; 3) The energy recovery module calculates the maximum torque value allowed to be recovered currently as the constraint upper limit.
[0022] In the above step 1), when the ABS detects an abnormal wheel slip ratio, it sends a signal to the energy recovery control module through bus communication.
[0023] In the above step 2), after receiving the abnormal wheel slip ratio status, the energy recovery control module switches the energy recovery torque interface and responds to the torque command issued by the BCS.
[0024] In the above step 3), the energy recovery module calculates the maximum torque value allowed to be recovered currently based on the high-voltage component status, SOC, and vehicle speed as the constraint upper limit, so that when the wheel slip ratio is abnormal in the coasting energy recovery state, the recovery torque can respond dynamically.
[0025] In the above step 3), the energy recovery control module continuously sends the upper limit value of the allowed energy recovery torque. In the above step 3), the ABS continuously monitors the slip ratio and sends an activation flag bit. In the above step 3), when the slip ratio flag bit is activated, the energy recovery control module switches the torque interface and responds to the BCS request for torque. In the above step 3), after the slip ratio activation flag bit exits, the energy recovery control module no longer responds to the BCS request for torque and switches to the normal coasting energy recovery torque interface.
[0026] Ensure that when the vehicle is in braking energy recovery and coasting energy recovery, if the vehicle experiences wheel lock-up, the energy recovery module can respond quickly to ensure the driving safety of the vehicle.
[0027] Under the coasting energy recovery condition, when the ABS detects an abnormal wheel slip ratio, it sends a signal to the energy recovery control module through bus communication. After receiving the abnormal wheel slip ratio status, the energy recovery control module switches the energy recovery torque interface and responds to the torque command issued by the BCS. At the same time, the energy recovery module calculates the maximum torque value allowed to be recovered currently based on the high-voltage component status, SOC, and vehicle speed as the constraint upper limit, ensuring that the recovery torque can respond dynamically when the wheel slip ratio is abnormal in the coasting energy recovery state and improving the driving safety of the vehicle.
[0028] The BCS control under the coasting energy recovery condition is as follows:
[0029] S1, the energy recovery control module continuously sends the upper limit value of the allowed energy recovery torque;
[0030] S2, the ABS continuously monitors the slip ratio and sends an activation flag bit;
[0031] S3, when the slip ratio flag bit is activated, the energy recovery control module switches the torque interface and responds to the BCS request for torque;
[0032] S4, after the slip ratio activation flag bit exits, the energy recovery control module no longer responds to the BCS request for torque and switches to the normal coasting energy recovery torque interface.
[0033] Hardware with lower cost can be used to achieve anti-lock control during the coasting energy recovery stage, improving the overall vehicle energy recovery utilization rate and also enhancing the safety of the vehicle under abnormal conditions.
[0034] After adopting the above structure, the BCS control function is realized based on the ABS, covering the control of torque when the slip ratio is abnormal under the coasting energy recovery working condition, ensuring the safety of the vehicle.
[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.
[0036] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "set", "connected", "fixed", "swivelly connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A BCS control method under energy recovery conditions based on ABS configuration, characterized in that: The steps include: 1) In the coasting energy recovery condition, ABS detects the vehicle condition and communicates with the energy recovery control module; 2) The energy recovery control module responds to the BCS action; 3) The energy recovery module calculates the maximum torque value currently allowed to be recovered as the upper limit of the constraint.
2. The BCS control method under energy recovery condition based on ABS configuration as claimed in claim 1, characterized in that: In the above step 1), when the ABS detects that the wheel slip rate is abnormal, a signal is sent to the energy recovery control module through bus communication.
3. The BCS control method under energy recovery condition based on ABS configuration as claimed in claim 2, characterized in that: In the above step 2), after receiving the abnormal state of wheel slip rate, the energy recovery control module switches the energy recovery torque interface to respond to the torque command issued by the BCS.
4. The BCS control method under energy recovery condition based on ABS configuration as claimed in claim 3, characterized in that: In the above step 3), the energy recovery module calculates the maximum torque value currently allowed for recovery as the upper limit of the constraint based on the state of the high-voltage component, SOC, and vehicle speed, so that when the slip rate is abnormal in the gliding energy recovery state, the recovery torque can respond dynamically.
5. The BCS control method under energy recovery condition based on ABS configuration as claimed in claim 4, characterized in that: In the above step 3), the energy recovery control module continuously sends the upper limit value of the allowable energy recovery torque.
6. The BCS control method under energy recovery condition based on ABS configuration as claimed in claim 5, characterized in that: In step 3) above, ABS continuously monitors the slip ratio and sends an activation flag.
7. The BCS control method under energy recovery condition based on ABS configuration as claimed in claim 6, characterized in that: In the above step 3), when the slip rate flag is activated, the energy recovery control module switches the torque interface to respond to the BCS request torque.
8. The BCS control method under energy recovery condition based on ABS configuration as claimed in claim 7, characterized in that: In the above step 3), when the slip ratio activation flag is exited, the energy recovery control module no longer responds to the BCS request torque and switches to the normal coasting energy recovery torque interface.