Battery replacement control system of battery replacement battery distribution vehicle

Abstract

The invention belongs to the technical field of battery replacement, and particularly relates to a battery replacement control system of a battery replacement battery distribution vehicle, which comprises at least two groups of battery replacement bottom supports, and is characterized in that high-voltage interfaces of the first group of battery replacement bottom supports are output to the whole vehicle after being connected in parallel through a convergence box and are used for providing driving electric energy for the distribution vehicle or being used as standby power for replacement; high-voltage interfaces of the second group of battery changing bottom supports are plugged; the low-voltage interfaces of all the battery changing bottom supports are connected in parallel and then are connected with the whole vehicle; the battery replacing bottom support is provided with the battery replacing controller which is used for controlling unlocking, locking and battery state communication of the battery replacing bottom support; the wireless communication unit is used for interaction between the distribution vehicle and the battery swap station and transmitting a battery swap instruction; and the vehicle control unit is connected with the battery replacement controller and the wireless communication unit through a public CAN bus and is used for coordinating high-voltage power supply selection. According to the invention, through the two groups of battery replacing bases, the battery replacing batteries are divided into the power battery pack and the standby battery pack, the whole process is automatic, and manual intervention and operation errors are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery swapping, and particularly relates to a battery swapping control system for a battery swapping and distribution vehicle. Background Art

[0002] The battery swapping technology solves the problem of electric vehicle charging by quickly replacing the battery, and has been more and more widely used. When the battery level of the battery swapping vehicle is low, it can go to the battery swapping station to replace the fully charged or more charged battery. The replaced battery is charged at the battery swapping station and then swapped out. However, in scenarios where the power grid is not connected or the charging power is insufficient, the discharged battery needs to be sent to a nearby place with charging capabilities to recharge the battery, and then delivered to the battery swapping station for vehicle battery swapping after charging. The existing technology lacks a battery swapping control system for distribution vehicles, resulting in low efficiency. The purpose of the present invention is to design an intelligent control system suitable for battery swapping and distribution vehicles to achieve flexible switching and efficient management of batteries on the distribution vehicle. Summary of the Invention

[0003] The purpose of the present invention is to provide a battery swapping control system for a battery swapping and distribution vehicle, which can achieve flexible switching and efficient management of batteries on the distribution vehicle.

[0004] The technical solutions adopted by the present invention are specifically as follows: A battery swapping control system for a battery swapping and distribution vehicle, comprising: At least two groups of battery swapping bases, wherein: The high-voltage interfaces of the first group of battery swapping bases are connected in parallel through a busbar box and output to the whole vehicle, for providing driving electric energy for the distribution vehicle or as a backup power replacement; The high-voltage interfaces of the second group of battery swapping bases are blocked and not connected to the whole vehicle, only used as backup power storage; Moreover, the low-voltage interfaces of all battery swapping bases are connected in parallel and then connected to the whole vehicle; A battery swapping controller, which is configured on the battery swapping base and used for controlling the unlocking, locking and battery state communication of the battery swapping base; A wireless communication unit, used for the distribution vehicle to interact with the battery swapping station and transmit battery swapping instructions; A vehicle controller, connected to the battery swapping controller and the wireless communication unit through a common CAN bus.

[0005] In one preferred embodiment, a set of battery swapping battery system is placed on each of the battery swapping bases, and the battery swapping battery system is built-in with a battery management system.

[0006] In one preferred embodiment, in the first group of battery swapping bases, only the high-voltage relay of one battery swapping battery is closed at the same time, and this battery swapping battery is used for power supply to the whole vehicle; the high-voltage relays of the remaining battery swapping batteries remain open for backup power replacement.

[0007] In one preferred embodiment, the battery swapping controller serves as the communication gateway between the vehicle controller and the battery management system, and is used to forward the upper and lower high-voltage commands and battery status data.

[0008] In one preferred embodiment, each battery swapping base is configured with 1 independent battery swapping controller, or multiple battery swapping bases are jointly configured with one battery swapping controller, and multiple battery swapping bases are managed simultaneously through this battery swapping controller.

[0009] In one preferred embodiment, the control of unlocking, locking and battery status communication of the battery swapping base includes: The battery swapping controller sends the battery and vehicle information to the wireless communication unit; The wireless communication unit establishes communication with the battery swapping station, and uploads the vehicle information and detailed data of all batteries to the battery swapping station control system; The battery swapping station control system screens out the batteries that need to be replaced according to the battery power, and sends the code and unlocking command of the target battery swapping base through the wireless communication unit; After receiving the code and unlocking command, the battery swapping controller of the target battery swapping base controls the unlocking of the target base and uploads the unlocking status; After the battery swapping is completed, the battery swapping station control system issues the code and locking command of the target battery swapping base, the battery swapping controller controls the target base to lock the battery, and uploads the locking status in time, and the battery swapping ends.

[0010] In one preferred embodiment, after the vehicle controller determines that the vehicle status meets the upper high-voltage condition, it sends the code and upper high-voltage command of the target battery swapping base on the CAN bus; After receiving it, the battery swapping controller of the target battery swapping base forwards the upper high-voltage command to the battery management system connected to the target battery swapping base; Start the upper high-voltage process of the battery pack, connect the battery pack to the high-voltage bus, and complete the upper high-voltage process of the vehicle; When the vehicle controller determines that the vehicle needs to go down high voltage, it sends the code and down high-voltage command of the target battery swapping base on the CAN bus. After receiving the code and down high-voltage command of the target base, the battery swapping controller forwards the down high-voltage command to the battery management system connected to the target battery swapping base, starts the down high-voltage process of the battery pack, and completes the down high-voltage process of the vehicle.

[0011] In one preferred embodiment, the high-voltage conditions include that the vehicle is in the parking gear and there is no fault alarm.

[0012] In one preferred embodiment, the battery management system includes an acquisition module, a control module and a communication module, wherein: The acquisition module is used to acquire the voltage, temperature and total current data of the replacement battery; The control module is used to control the battery to go on and off high voltage and operate safely; The communication module is used to receive information from other controllers and send battery information to other controllers. In one preferred embodiment, the wireless communication unit includes a communication monitoring module and a trigger module. The communication monitoring module is used to monitor the communication status of the wireless communication unit. When the wireless communication unit is disconnected, it automatically caches the instructions and attempts to reconnect. If the connection is not restored after a timeout, the trigger module triggers the local security mode, and the local security mode includes locking the battery on the replacement battery tray.

[0013] The technical effects achieved by the present invention are as follows: by using at least two groups of replacement battery trays to respectively undertake the functions of power supply and backup power storage, it can meet the power requirements of the replacement battery delivery vehicle, support the vehicle to carry fully charged batteries and discharged batteries simultaneously during driving, reduce the number of times the delivery vehicle travels back and forth to the battery replacement station, improve the energy replenishment efficiency. At the same time, the battery replacement process is controlled by a battery replacement controller, etc., and through the instruction interaction between the wireless communication unit (WBU) and the battery replacement controller, the full process of unlocking, battery replacement and locking is realized automatically, reducing manual intervention and operation errors. Especially, it provides fast battery replacement support for electric trucks and reduces the charging waiting time. At the same time, for energy replenishment in remote areas, in areas where the power grid is not covered, the battery is recycled and replenished through the delivery vehicle, reducing the difficulty of battery replacement in areas where the power grid is not connected. Description of the Drawings

[0014] Figure 1 is the system connection diagram in the embodiment of the present invention; Figure 2 is the CAN network topology of the battery replacement control system in the embodiment of the present invention; Figure 3 is the schematic diagram of a single replacement battery system in the embodiment of the present invention; Figure 4 is the flow chart of the power battery going on and off high voltage as the main battery of the vehicle in the embodiment of the present invention; Figure 5 is the battery replacement flow chart in the embodiment of the present invention. Detailed Embodiments

[0015] In order to make the purpose and advantages of the present invention clearer, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text only describes one or several specific implementation manners of the present invention, and does not strictly limit the specific protection scope claimed by the present invention.

[0016] As Figures 1 to 5 shown, a battery replacement control system for a battery replacement delivery vehicle includes: At least two groups of replacement battery trays, where: The high-voltage interfaces of the first group of battery swapping trays are connected in parallel through a busbar box and then output to the whole vehicle, which is used to provide driving electric energy for the distribution vehicle or as backup power for replacement. The high-voltage interfaces of the second group of battery swapping trays are blocked and not connected to the whole vehicle, only used as backup power storage. Moreover, the low-voltage interfaces of all battery swapping trays are connected in parallel and then connected to the whole vehicle. Battery swapping controller (BSC), the battery swapping tray is configured with a battery swapping controller BSC, which is used to control the unlocking, locking and battery status communication of the battery swapping tray. Among them, a set of battery swapping battery system is placed on each battery swapping tray, and a battery management system (BMS) is built in the battery swapping battery system. The battery swapping controller (BSC) serves as the communication gateway between the vehicle controller (VCU) and the battery management system (BMS), and is used to forward the upper and lower high-voltage instructions and battery status data. Wireless communication unit (WBU), which is used for the distribution vehicle to interact with the battery swapping station and transmit battery swapping instructions. Vehicle controller (VCU), which is connected to the battery swapping controller (BSC) and the wireless communication unit (WBU) through the common CAN bus.

[0017] It should be noted that whether it is the first group of battery swapping trays or the second group of battery swapping trays, they can be composed of separate battery swapping trays respectively, or can be composed of a combination of multiple separate battery swapping trays. The specific quantity is not limited here.

[0018] In the above embodiment, at least two groups of battery swapping trays are used to undertake the functions of power supply and backup power storage respectively, which can meet the power demand of the battery swapping distribution vehicle. At the same time, the battery swapping process is controlled through the battery swapping controller and other components. Through the instruction interaction between the wireless communication unit (WBU) and the battery swapping controller, the full process of unlocking, battery swapping and locking is realized automatically, reducing manual intervention and operation errors. Especially, it provides fast battery swapping support for electric trucks and reduces the charging waiting time. At the same time, for energy replenishment in remote areas, in areas where the power grid is not covered, the battery cycle replenishment is realized through the distribution vehicle, reducing the difficulty of battery swapping in areas where the power grid is not connected.

[0019] As Figure 1 shown, for the first group of battery swapping trays used to supply power to the distribution vehicle, in this first group of battery swapping trays, only the high-voltage relay of one battery swapping battery is closed at the same time, and this battery swapping battery is used to supply power to the whole vehicle; the high-voltage relays of the remaining battery swapping batteries remain open, which are used for backup power replacement, so as to avoid circulating current caused by inconsistent voltages of each battery swapping battery. By adopting this method, the power supply of the distribution vehicle can rely on a single battery swapping battery for power supply, ensuring the safety of other battery swapping batteries. When the battery swapping battery used for power supply has too low or depleted power, other battery swapping batteries on the first group of battery swapping trays can be selected for connection.

[0020] AsFigure 2 As shown, each battery swapping base is configured with 1 independent battery swapping controller (BSC), or multiple battery swapping bases are jointly configured with a battery swapping controller (BSC). Through this battery swapping controller (BSC), multiple battery swapping bases are managed simultaneously. By adopting this method, the use of the battery swapping controller is more flexible. During actual use, it can be selected according to the actual situation, and the control method is not specifically limited here.

[0021] As Figure 5 shown, controlling the unlocking, locking and battery status communication of the battery swapping base includes: The battery swapping controller sends battery and vehicle information to the wireless communication unit; The wireless communication unit (WBU) establishes communication within the battery swapping station, and uploads the vehicle information and detailed data of all batteries to the battery swapping station control system; The battery swapping station control system screens out the batteries that need to be replaced according to the battery power, and sends the code and unlocking instruction of the target battery swapping base through the wireless communication unit (WBU); After receiving the code and unlocking instruction, the battery swapping controller (BSC) of the target battery swapping base controls the unlocking of the target base and uploads the unlocking status; After the battery swapping is completed, the battery swapping station control system issues the code and locking instruction of the target battery swapping base. The battery swapping controller (BSC) controls the target base to lock the battery and uploads the locking status in a timely manner, and the battery swapping ends.

[0022] During the above process of controlling the unlocking, locking and battery status communication of the battery swapping base, through the instruction interaction between the wireless communication unit and the battery swapping controller, the entire process of unlocking, battery swapping and locking is automated, reducing manual intervention and operation errors, especially reducing the requirements for the operators of distribution vehicles.

[0023] As Figure 4 shown, after the vehicle controller (VCU) determines that the vehicle status meets the condition of applying high voltage, it sends the code of the target battery swapping base and the high voltage application command on the CAN bus. Among them, the high voltage conditions include that the vehicle is in the parking gear and there is no fault alarm; After receiving it, the battery swapping controller (BSC) of the target battery swapping base forwards the high voltage application instruction to the battery management system (BMS) connected to the target battery swapping base; Start the high voltage application process of the battery pack, connect the battery pack to the high voltage bus, and complete the high voltage application process of the whole vehicle; When the vehicle control unit (VCU) determines that the vehicle needs to cut off high voltage, it sends the target battery swapping tray code and the high voltage cut-off command on the CAN bus. After receiving the battery swapping tray code and the high voltage cut-off command, the battery swapping controller (BSC) of the target battery swapping tray forwards the high voltage cut-off instruction to the battery management system (BMS) connected to the target battery swapping tray, starts the high voltage cut-off process of the battery pack, and completes the high voltage cut-off process of the whole vehicle. In the above steps, it is basically the same as the unlocking process of the battery swapping tray, and its purpose is also to reduce manual intervention, making the battery swapping operation easier.

[0024] The battery management system includes a collection module, a control module, and a communication module, where: The collection module is used to collect the voltage, temperature, and total current data of the battery for swapping. The control module is used to control the high voltage cut-off and connection of the battery and its safe operation. The communication module is used to receive information from other controllers and send battery information to other controllers.

[0025] The wireless communication unit (WBU) includes a communication monitoring module and a triggering module. The communication monitoring module is used to monitor the communication status of the wireless communication unit (WBU). When the wireless communication unit (WBU) is disconnected, it automatically caches the instructions and attempts to reconnect. If the connection is not restored after a timeout, the triggering module triggers the local security mode. The local security mode includes locking the battery of the battery swapping tray. In this way, the safety of the battery can be ensured in case of unstable communication, and the occurrence of abnormal situations caused by disconnection can be reduced.

[0026] In summary, the present invention divides the battery for swapping into a power battery group and a spare battery group through two sets of battery swapping bases, supports the vehicle to carry a fully charged battery and a discharged battery simultaneously during driving, reduces the number of round trips of the distribution vehicle to the battery swapping station, and improves the energy replenishment efficiency. In addition, when supplying power to the distribution vehicle, it can avoid the problem of inconsistent voltage caused by parallel connection of multiple batteries and eliminate potential safety hazards. Through the instruction interaction between the WBU and the BSC, the full process of unlocking, battery swapping, and locking is automated, reducing manual intervention and operation errors, and improving the safety of the battery for swapping.

[0027] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention are implemented according to the conventional means in the art without special description and limitation.

Claims

1. A battery replacement control system for a battery replacement delivery vehicle, characterized in that: include: At least two sets of battery replacement brackets, including: The high-voltage interface of the first set of battery replacement brackets is connected in parallel through a junction box and then output to the entire vehicle to provide driving power for the delivery vehicle or as a backup power replacement; The high-voltage interface of the second battery replacement bracket is blocked and is not connected to the vehicle, and is only used as backup power storage; Moreover, the low-voltage interfaces of all battery-swap bases are connected in parallel to the entire vehicle; A battery swap controller, the battery swap base is equipped with a battery swap controller, which is used to control the unlocking, locking and battery status communication of the battery swap base; Wireless communication unit, used for the delivery vehicle to interact with the battery swap station and transmit battery swap instructions; The vehicle controller is connected to the battery swap controller and the wireless communication unit through a public CAN bus.

2. The battery replacement control system of the battery replacement battery delivery vehicle according to claim 1 is characterized in that: A battery replacement battery system is placed on each of the battery replacement bases, and the battery replacement battery system has a built-in battery management system.

3. The battery replacement control system of the battery replacement battery delivery vehicle according to claim 1 is characterized in that: In the first group of battery swap bases, only the high-voltage relay of one battery swap battery is closed at the same time, and the battery swap battery is used to power the entire vehicle; the high-voltage relays of the remaining battery swap batteries remain disconnected for backup power replacement.

4. The battery replacement control system of the battery replacement battery delivery vehicle according to claim 1, characterized in that: The battery swap controller serves as a communication gateway between the vehicle controller and the battery management system, and is used to forward upper and lower high voltage instructions and battery status data.

5. The battery replacement control system of the battery replacement battery delivery vehicle according to claim 1, characterized in that: Each battery swap base is configured with an independent battery swap controller, or multiple battery swap bases are jointly configured with a battery swap controller, and multiple battery swap bases are managed simultaneously through the battery swap controller.

6. The battery replacement control system of the battery replacement battery delivery vehicle according to claim 1, characterized in that: The control of unlocking, locking and battery status communication of the battery replacement base includes: The battery swap controller sends the battery and vehicle information to the wireless communication unit; The wireless communication unit establishes communication with the battery swap station and uploads the vehicle information and detailed data of all batteries to the battery swap station control system; The control system of the battery swap station selects the batteries that need to be replaced according to the battery power, and sends the code and unlocking instructions of the target battery swap base through the wireless communication unit; After receiving the coding and unlocking instructions, the battery swapping controller of the target battery swapping base controls the target base to unlock and uploads the unlocking status; After the battery swap is completed, the control system of the battery swap station sends the coding and locking instructions of the target base, the battery swap controller controls the target base to lock the battery, and uploads the locking status in time, and the battery swap is completed.

7. The battery replacement control system of the battery replacement battery delivery vehicle according to claim 1, characterized in that: After determining that the vehicle state meets the high-voltage condition, the vehicle controller sends the target battery replacement base code and the high-voltage command on the CAN bus; After receiving the high voltage instruction, the battery swap controller of the target battery swap base forwards the high voltage instruction to the battery management system connected to the target battery swap base; Start the high-voltage process of the battery pack, connect the battery pack to the high-voltage bus, and complete the high-voltage process of the whole vehicle; When the vehicle controller determines that the vehicle needs to reduce high voltage, it sends the target battery swap base code and high voltage reduction command on the CAN bus. After receiving the battery swap base code and high voltage reduction command, the battery swap controller of the target battery swap base forwards the high voltage reduction instruction to the battery management system connected to the target battery swap base, starts the battery pack's high voltage reduction process, and completes the vehicle's high voltage reduction process.

8. The battery replacement control system of the battery replacement delivery vehicle according to claim 7, characterized in that: The high-pressure condition includes that the vehicle is in parking gear and there is no fault alarm.

9. The battery replacement control system of the battery replacement delivery vehicle according to claim 1, characterized in that: The battery management system includes a collection module, a control module and a communication module, wherein: The acquisition module is used to collect the voltage, temperature and total current data of the battery replacement; The control module is used to control the upper and lower high voltages of the battery and safe operation; The communication module is used to receive information from other controllers and send battery information to other controllers.

10. The battery replacement control system of the battery replacement battery delivery vehicle according to claim 1, characterized in that: The wireless communication unit includes a communication monitoring module and a trigger module. The communication monitoring module is used to monitor the communication status of the wireless communication unit. When the wireless communication unit is disconnected, it automatically caches instructions and attempts to reconnect. If the connection is not restored within the time limit, the trigger module triggers the local safety mode. The local safety mode includes locking the battery on the battery replacement base.

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