Single-side battery replacement control method for refrigerator car

Abstract

The invention discloses a single-side battery replacement control method for a refrigerator car, which comprises the following steps of: driving the car to a battery replacement area of a battery replacement station in the forward direction, scanning a code for payment, and starting battery replacement at an applet point; the station end sends a battery replacement mark [swp = 1] to the vehicle end TBOX; the station end sends an unlocking instruction [lock = 1, side = 2] to the vehicle end TBOX, and a right side battery is unlocked; the vehicle end receives the unlocking instruction and detects whether the battery replacement mark swap of the vehicle end is 1 or not, execution is refused when the battery replacement mark swap is not 1, and execution is carried out when the battery replacement mark swap is 1; after the station end detects that unlocking succeeds according to the reported locking state, the right side battery replacement process is started; after the right side battery replacement is completed, the station end sends a locking instruction [lock = 2, side = 2] to the vehicle end TBOX; after the vehicle end receives the right side locking instruction, the DCS locks 3 / 4 of the right side locking motor and synchronously uploads the locking state; and then the left battery is charged. The requirement for continuous power supply during battery replacement of the refrigerator car can be met, and the battery replacement efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of battery charging and discharging technology, and particularly relates to a method for controlling unilateral battery swapping in refrigerated trucks. Background Technology

[0002] With the continuous development and popularization of new energy vehicles, the battery swapping equipment and battery swapping control methods used for battery swapping of new energy vehicles have also been continuously improved and perfected, thereby greatly improving the convenience and efficiency of battery swapping for new energy vehicles. New energy refrigerated trucks require continuous power supply during battery swapping due to their internal temperature requirements. However, conventional battery swapping equipment cannot meet the need for simultaneous battery swapping and power supply. Therefore, refrigerated trucks usually have to use external power supply or directly charge the battery, making battery swapping very troublesome and inefficient. Summary of the Invention

[0003] To address the deficiencies and shortcomings of the existing technology, this invention provides a single-sided battery swapping control method for refrigerated trucks that employs multi-core power supply and step-by-step power cut-off. First, the right battery is swapped, but only the right battery is disconnected while the left battery remains powered on. Then, the left battery is swapped, but only the left battery is disconnected while the right battery remains powered on. This method ensures that only a portion of the battery is disconnected during swapping, while the remaining portion continues to supply power without interrupting the power supply. This method not only meets the continuous power supply requirements of refrigerated trucks during battery swapping but also achieves high swapping efficiency.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a method for controlling a single-sided battery swap in a refrigerated truck, comprising the following steps: S1. Drive the vehicle to the battery swapping area of ​​the station, scan the code to pay, and start the battery swapping process on the mini-program. S2. The station sends a battery swapping marker [swap=1] to the vehicle's TBOX. S3. The station sends an unlock command [lock=1,side=2] to the vehicle-side TBOX to unlock the right-side battery; S4. When the vehicle receives the unlock command, it checks whether the battery swap flag on the vehicle is 1. If it is not 1, it refuses to execute; if it is 1, it executes. S5. After the station detects successful unlocking based on the reported lockout status, it begins the right-side battery swapping process. S6. After the battery swap on the right side is completed, the station sends a locking command [lock=2,side=2] to the TBOX on the train. S7. After receiving the right-side locking command, the DCS locks the right-side locking motor 3 / 4 and simultaneously uploads the locking status. S8. After the station detects that the motor is successfully locked, a voice prompt will indicate that the vehicle should be turned around and the battery replaced. S9. Drive the car in the opposite direction to the battery swapping station's battery swapping area, and start the battery swapping process via the mini-program. S10. The station sends an unlock command [lock=1,side=1] to the vehicle-side TBOX to unlock the left battery; S11. When the vehicle receives the unlock command, it checks whether the battery swap flag on the vehicle is 1. If it is not 1, it refuses to execute; if it is 1, it executes. S12. After the station detects that the unlocking is successful based on the reported locking status, it starts the left-side battery swapping process. S13. After the battery swap on the left side is completed, the station sends a locking command [lock=2,side=1] to the TBOX on the train. S14. The vehicle executes the right-side locking command after receiving it. S15. After the station detects that the motor is successfully locked, the station sends a battery swap marker [swap=0] to the vehicle's TBOX to release the battery swap marker and indicate that the battery swap is complete before the vehicle departs.

[0005] Preferably, the battery swapping marker mainly affects the reporting frequency and whether unlocking is performed.

[0006] Preferably, the specific steps performed in step S4 when the vehicle-side battery swap flag swap is 1 are as follows: The main control disconnects the high voltage from the relays in branches 2 / 3 / 4, while retaining branch 1 to supply power to the chiller. The DCS unlocks the right-side locking motor 3 / 4 and simultaneously reports the locking status. The locking status is determined solely based on the right-side motor.

[0007] Preferably, if the locking status is not easily determined based on the right-side motor, an additional reporting field is added, using the lower 5 bits of an integer to represent the locking status of the four motors: 0 locked, 1 unlocked. An execution status is also added: 0 not executing, 1 executing. The last bit represents the execution status, from last to first, representing the locking status of the 1st / 2nd / 3rd / 4th motors. 0b10101 indicates execution in progress, 1 locked, 2 unlocked, 3 locked, 4 unlocked. 0b00000 indicates a fully locked state, and 0b11110 indicates a fully unlocked state.

[0008] Preferably, the specific steps performed in step S11 when the vehicle-side battery swap flag swap is 1 are as follows: When the main controller disconnects the relay supporting 1 to apply high voltage, all branches 1 / 2 / 3 / 4 apply high voltage. Two seconds after branch 1 applies high voltage, the main controller closes the relay of branch 2 to apply high voltage, taking over the power supply from branch 1 to the chiller. Branches 1 / 3 / 4 remain disconnected. The DCS unlocks the left-side lock motor 1 / 2 and simultaneously reports the locking status. The locking status is determined solely based on the left-side motor.

[0009] Preferably, if the locking status is not easily determined based on the left motor, an additional reporting field is added, using the lower 5 bits of an integer to represent the locking status of the four motors: 0 locked, 1 unlocked. An execution status is also added: 0 not executing, 1 executing. The last bit represents the execution status, from last to first, representing the locking status of the 1st / 2nd / 3rd / 4th motors. 0b10101 indicates execution in progress, 1 locked, 2 unlocked, 3 locked, 4 unlocked. 0b00000 indicates a fully locked state, and 0b11110 indicates a fully unlocked state.

[0010] Preferably, the specific steps executed by the vehicle after receiving the right-side locking command in step S14 are as follows: The DCS locks the left side of the motor 1 / 2 and simultaneously uploads the locking status. After successful locking, the main controller checks whether there is a fault in branch 1 / 3 / 4. If there is no fault, it directly closes branch 1 / 3 / 4. If branch 1 / 3 / 4 is faulty or does not meet the closed loop procedure, all branches 1 / 2 / 3 / 4 will be disconnected and then closed.

[0011] Preferably, the conditions for directly closing branch 1 / 3 / 4 are as follows: the total voltage difference between it and branch 2 is less than 10V, and the SOC difference between it and branch 2 is less than 40%.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This invention employs multi-core power supply and step-by-step power cut-off. First, the right battery is swapped, but only the right battery is disconnected while the left battery remains powered. Then, the left battery is swapped, but only the left battery is disconnected while the right battery remains powered. Thus, during battery swapping, only a portion is disconnected while the other portion continues to supply power without interrupting the power supply. This not only meets the continuous power supply requirements of refrigerated trucks during battery swapping but also ensures high battery swapping efficiency. Attached Figure Description

[0013] Figure 1 This is a flowchart illustrating the battery swapping process on the right side of the present invention. Figure 2 This is a flowchart of the battery swapping process on the left side in this invention. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Example 1: A single-sided battery swapping control method for a refrigerated truck, where the right-side battery is swapped first, such as... Figure 1 As shown, the steps are as follows: The refrigerated truck drove straight to the battery swapping area of ​​station A200, paid by scanning the QR code with WeChat, and started the battery swapping process via the mini-program. The station sends a battery swap flag [swap=1] to the vehicle's TB0X. The battery swap flag mainly affects the reporting frequency and whether unlocking is performed. The station sends an unlock command [lock=1,side=2] to the vehicle's TBOX to unlock the right-side battery; 4) When the vehicle receives the unlock command, it checks whether the battery swap flag on the vehicle is 1. If it is not 1, the operation will be rejected; if it is 1, the following steps will be taken: a) The main control disconnects the high voltage of the relays in branches 2 / 3 / 4, while retaining branch 1 to supply power to the chiller; b) The DCS unlocks the right-side locking motors 3 and 4 and reports the locking status simultaneously. The locking status is determined only based on the right-side motors. (If it is inconvenient to add another reporting field, use the lower 5 bits of an integer to represent the locking status of the four motors (0 locked, 1 unlocked), and add an execution status (0 no execution, 1 execution). The last bit is the execution status, and from the last bit to the first bit, they are the locking status of the 1st / 2nd / 3rd / 4th motors. For example, 0b10101 indicates that it is executing, motor 1 is locked, 2 is unlocked, 3 is locked, and 4 is unlocked. 0b00000 indicates a fully locked state, and 0b11110 indicates a fully unlocked state.) 5) Once the station detects successful unlocking based on the reported locking status, it begins the right-side battery swapping process; 6) After the battery swap on the right side is completed, the station sends a lock command [lock=2,side=2] to the TBOX on the train. 7) After receiving the right-side locking command, the DCS locks the right-side locking motor 3 / 4 and simultaneously uploads the locking status. 8) After the station detects that the motor has been successfully locked, a voice prompt will indicate that the motor should be turned around and the battery replaced. Then swap the battery on the left side, such as Figure 2 As shown, the steps are as follows: Drive the car in the opposite direction to the battery swapping area of ​​station A200, and start the battery swapping process via the mini-program; The station sends an unlock command [lock=1,side=1] to the vehicle's TBOX to unlock the left battery; When the vehicle receives the unlock command, it checks whether the battery swap flag is 1. If it is not 1, the operation is rejected; if it is 1, the following steps are taken: When the main controller disconnects the relay supporting 1 to apply high voltage, all branches 1 / 2 / 3 / 4 apply high voltage. Two seconds after branch 1 applies high voltage, the main controller closes the relay of branch 2 to apply high voltage, taking over the power supply from branch 1 to the chiller. Branches 1 / 3 / 4 remain disconnected. b) The DCS unlocks the left lock motor 1 / 2 and simultaneously reports the locking status. The locking status is determined only based on the left motor (or represented by the lower 5 bits of an integer). 4) Once the station detects successful unlocking based on the reported lockout status, it begins the battery swapping process on the left side; 5) After the battery swap on the left side is completed, the station sends a lock command [lock=2,side=1] to the TBOX on the train. 6) After receiving the right-side lock command, the vehicle will execute the following: a) Lock the left side of the DCS to the locking motor 1 / 2 and simultaneously upload the locking status; b) After successful locking, the main controller checks whether there is a fault in branch 1 / 3 / 4. If there is no fault, it combines branch 1 / 3 / 4 and directly closes the condition (the total voltage difference between 1 and branch 2 is less than 10V, and the SOC difference between 2 and branch 2 is less than 40%). c) If branch 1 / 3 / 4 is faulty or does not meet the closed loop procedure, all branches 1 / 2 / 3 / 4 shall be disconnected and then closed. 7) After the station detects that the motor is successfully locked, the station sends a battery swap marker [swap=0] to the vehicle's TBOX to release the battery swap marker and indicate that the battery swap is complete before the vehicle departs.

[0016] Example 2: Application of a single-sided battery swapping control method for refrigerated trucks. The A200 battery swapping station, officially named the A200 fully automatic battery swapping station, is a fully automatic robotic battery swapping station with a standard power of 160KW (suitable for most areas) and 200KW (suitable for a few areas) developed in response to the State Grid's "Three Zeros and Three Provinces" policy. The station is equipped with 24 battery boxes.

[0017] The overall dimensions of the station are 4.5m (length) x 4m (width) x 3.7m (height). The site only requires the space of two standard parking spaces; the battery swapping station adopts a prefabricated structure, which can be quickly hoisted and deployed in suitable areas, and has the advantages of convenient site selection and quick deployment.

[0018] The A200 station is mainly suitable for battery swapping of light and medium trucks (including refrigerated light and medium trucks), and can swap 2, 4, 6, 8, or 12 batteries as needed.

[0019] The configuration table for station A200 is as follows:

[0020] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for controlling a single-sided battery swapping in a refrigerated truck, characterized in that: The steps are as follows: S1. Drive the vehicle to the battery swapping area of ​​the station, scan the code to pay, and start the battery swapping process on the mini-program. S2. The station sends a battery swapping marker [swap=1] to the vehicle's TBOX. S3. The station sends an unlock command [lock=1,side=2] to the vehicle-side TBOX to unlock the right-side battery; S4. When the vehicle receives the unlock command, it checks whether the battery swap flag on the vehicle is 1. If it is not 1, it refuses to execute; if it is 1, it executes. S5. After the station detects successful unlocking based on the reported lockout status, it begins the right-side battery swapping process. S6. After the battery swap on the right side is completed, the station sends a locking command [lock=2,side=2] to the TBOX on the train. S7. After receiving the right-side locking command, the DCS locks the right-side locking motor 3 / 4 and simultaneously uploads the locking status. S8. After the station detects that the motor is successfully locked, a voice prompt will indicate that the vehicle should be turned around and the battery replaced. S9. Drive the car in the opposite direction to the battery swapping station's battery swapping area, and start the battery swapping process via the mini-program. S10. The station sends an unlock command [lock=1,side=1] to the vehicle-side TBOX to unlock the left battery; S11. When the vehicle receives the unlock command, it checks whether the battery swap flag on the vehicle is 1. If it is not 1, it refuses to execute; if it is 1, it executes. S12. After the station detects that the unlocking is successful based on the reported locking status, it starts the left-side battery swapping process. S13. After the battery swap on the left side is completed, the station sends a locking command [lock=2,side=1] to the TBOX on the train. S14. The vehicle executes the right-side locking command after receiving it. S15. After the station detects that the motor is successfully locked, the station sends a battery swap marker [swap=0] to the vehicle's TBOX to release the battery swap marker and indicate that the battery swap is complete before the vehicle departs.

2. The refrigerated truck single-sided battery swapping control method according to claim 1, characterized in that: The battery swapping marker primarily affects the reporting frequency and whether unlocking is performed.

3. The refrigerated truck single-sided battery swapping control method according to claim 1, characterized in that: The specific steps to be performed when the vehicle-side battery swap flag (swap) is 1 in step S4 are as follows: The main control disconnects the high voltage from the relays in branches 2 / 3 / 4, while retaining branch 1 to supply power to the chiller. The DCS unlocks the right-side locking motor 3 / 4 and simultaneously reports the locking status. The locking status is determined solely based on the right-side motor.

4. The refrigerated truck single-sided battery swapping control method according to claim 3, characterized in that: If the locking status cannot be easily determined based on the right-side motor, an additional reporting field is added, using the lower 5 bits of an integer to represent the locking status of the four motors: 0 locked, 1 unlocked. An execution status is also added: 0 not executing, 1 executing. The last bit represents the execution status, from last to first, representing the locking status of motors 1 / 2 / 3 / 4. 0b10101 indicates execution in progress, motor 1 locked, 2 unlocked, 3 locked, 4 unlocked. 0b00000 indicates a fully locked state, and 0b11110 indicates a fully unlocked state.

5. The refrigerated truck single-sided battery swapping control method according to claim 1, characterized in that: The specific steps to be performed when the vehicle-side battery swap flag (swap) is 1 in step S11 are as follows: When the main controller disconnects the relay supporting 1 to apply high voltage, all branches 1 / 2 / 3 / 4 apply high voltage. Two seconds after branch 1 applies high voltage, the main controller closes the relay of branch 2 to apply high voltage, taking over the power supply from branch 1 to the chiller. Branches 1 / 3 / 4 remain disconnected. The DCS unlocks the left-side lock motor 1 / 2 and simultaneously reports the locking status. The locking status is determined solely based on the left-side motor.

6. The refrigerated truck single-sided battery swapping control method according to claim 5, characterized in that: If the locking status cannot be easily determined based on the left motor, an additional reporting field is added, using the lower 5 bits of an integer to represent the locking status of the four motors: 0 for locked and 1 for unlocked. An execution status is also added: 0 for no execution and 1 for execution. The last bit represents the execution status, from last to first, representing the locking status of the 1st / 2nd / 3rd / 4th motors. 0b10101 indicates execution in progress, 1st motor locked, 2nd motor unlocked, 3rd motor locked, and 4th motor unlocked. 0b00000 indicates a fully locked state, and 0b11110 indicates a fully unlocked state.

7. The refrigerated truck single-sided battery swapping control method according to claim 1, characterized in that: The specific steps executed by the vehicle after receiving the right-side locking command in step S14 are as follows: The DCS locks the left side of the motor 1 / 2 and simultaneously uploads the locking status. After successful locking, the main controller checks whether there is a fault in branch 1 / 3 / 4. If there is no fault, it directly closes branch 1 / 3 / 4. If branch 1 / 3 / 4 is faulty or does not meet the closed loop procedure, all branches 1 / 2 / 3 / 4 will be disconnected and then closed.

8. The refrigerated truck single-sided battery swapping control method according to claim 7, characterized in that: The conditions for directly closing branches 1 / 3 / 4 are as follows: the total voltage difference between them and branch 2 is less than 10V, and the SOC difference between them and branch 2 is less than 40%.

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