Control method and system for working mode of battery swap station

Abstract

This invention discloses a control method and system for the working mode of batteries in a battery swapping station. The battery swapping station includes an in-station monitoring platform and several sets of corresponding chargers and charging compartments. Each charger in each set is communicatively connected to the battery pack installed in the charging compartment. The in-station monitoring platform is also communicatively connected to each charger. The control method includes the following steps: the in-station monitoring platform sends a power-on command to the corresponding charger; upon receiving the power-on command, the charger controls the battery pack in the corresponding charging compartment to be powered on at low voltage; the in-station monitoring platform responds to the charging start command by sending a first message to the charger; upon receiving the first message, the charger forwards the first message to the battery pack in the corresponding charging compartment; and upon receiving the first message, the battery pack enters the battery swapping station charging mode. This invention simplifies the structural design of the battery swapping station, reduces costs, and ensures good DC charging of the batteries within the station.

Description

[0001] This application is a divisional application of the invention patent filed on December 14, 2018, with application number 2018115325292 and invention title "Control Method and System for Working Mode of Battery Swapping in Battery Swapping Station". Technical Field

[0002] This invention relates to the field of battery charging in battery swapping stations, and particularly to a control method and system for the operating mode of batteries in battery swapping stations. Background Technology

[0003] Currently, DC fast charging for non-battery-swapping vehicles on the market all comply with standards such as GBT27930-2015 "Communication Protocol between Off-board Conductive Charger and Battery Management System for Electric Vehicles", GBT18487.1-2015 "Conductive Charging System for Electric Vehicles", and GBT20234.1-2015 "Connection Device for Conductive Charging of Electric Vehicles Part 3: DC Charging Interface". However, some vehicle manufacturers test the A+ (a type of signal) wake-up signal and the CC2 (a signal used to determine the reliability of the connection between the battery and the charger) charging connection signal within the vehicle itself, while others test them within the battery's BMS (Battery Management System). If a battery swapping station relies solely on the A+ wake-up signal and the CC2 charging connection signal to initiate battery charging (also known as battery pack charging), it cannot guarantee normal charging functionality for all vehicle models. Furthermore, due to the complex structure of battery swapping stations, adding control over the A+ wake-up signal and the CC2 charging connection signal would complicate the wiring harness, increase costs, and consume pin resources of the quick-swap connectors.

[0004] Furthermore, the application scenarios within battery swapping stations are more unique. Besides ensuring the normal operation of DC fast charging for the battery pack, the battery pack's BMS must be able to upload monitoring data to the station's monitoring platform to monitor battery status, regardless of whether the battery pack is charging or not, as long as it is placed in the charging compartment. However, when the battery pack is located in a vehicle, most automakers do not want to generate unnecessary monitoring information and reduce the load rate of the fieldbus. Therefore, the battery pack needs to be able to clearly identify whether it is in the battery swapping station or on the vehicle. Currently, the common practice is to determine that the battery is in the battery swapping station when the BMS cannot detect the control information of the vehicle's fieldbus. This approach poses a safety hazard due to the inability to distinguish between vehicle communication failures. Specifically, when the battery is installed on the vehicle, if the vehicle communication fails, the battery swapping battery's BMS will not detect the control information of the vehicle's fieldbus and will mistakenly assume it is in the battery swapping station. Therefore, the current approach has the problem of incorrect location identification when the vehicle communication fails. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology of starting battery charging in a battery swapping station through A+ wake-up signal and CC2 charging connection signal, which has complex wiring, high cost and incompatibility with all vehicle models. The present invention provides a control method and system for the working mode of the battery swapping station that can simplify the structural design of the battery swapping station, reduce costs and at the same time ensure good DC charging of the battery swapping station.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] This invention provides a control method for the working mode of batteries in a battery swapping station. The battery swapping station includes an in-station monitoring platform and several sets of corresponding chargers and charging compartments. Each charger in each set is communicatively connected to the battery pack installed in the charging compartment. The in-station monitoring platform is communicatively connected to each charger.

[0008] The control method includes the following steps:

[0009] The station monitoring platform sends a power-on command to the corresponding charger.

[0010] Upon receiving the power-on command, the charger controls the battery pack in the corresponding charging compartment to be powered on at low voltage.

[0011] The on-site monitoring platform responds to the charging start command and sends a first message to the charger.

[0012] After receiving the first message, the charger forwards the first message to the battery pack in the corresponding charging compartment.

[0013] The battery pack enters the battery swapping station charging mode after receiving the first message.

[0014] In this solution, the power-on command is an instruction input from the outside to the station's monitoring platform, which is implemented according to specific needs. For example, it can be an instruction input by on-site staff to the station's monitoring platform through the operating interface.

[0015] In this scheme, after receiving the first message, the battery pack begins a handshake operation with the charger and enters the battery swapping station charging mode. During the charging process, DC charging control is performed according to the procedures specified in GBT27930 (a protocol), including the handshake phase, configuration phase, charging phase, and charging end phase (charging end includes fault termination, full charge termination, and manual termination). The first message is the message notifying the battery pack that it has entered the battery swapping station charging mode, which indicates that the battery pack is in a charging state. The specific message content can be set according to actual needs, as long as the battery pack can parse and recognize it. For example, a certain byte in the message can be set to a preset value to represent entering charging, and set to other values ​​to represent exiting charging. This will not be elaborated further here.

[0016] Based on the hardware architecture within the battery swapping station, this solution enables the station's monitoring platform to send a first message to the target charger, which then forwards the first message to the battery pack located in the charging compartment corresponding to that target charger. This allows the battery pack to accurately determine when to enter the battery swapping station's charging mode for charging, replacing the existing A+ wake-up signal and CC2 charging connection signal provided by the charger to the battery pack. This simplifies the system design of the battery swapping station and reduces costs while ensuring a good DC charging process within the station.

[0017] Preferably, the control method further includes the following steps:

[0018] When the battery pack is in the charging mode of the battery swapping station, it sends battery monitoring information to the station's monitoring platform.

[0019] This solution enables battery monitoring information to be uploaded to the station's monitoring platform while the battery pack is charging in the charging compartment, thus allowing for monitoring of the battery status. The battery monitoring information can be configured according to specific monitoring needs, and may include, for example, the battery's current charge level, voltage, current, and temperature.

[0020] Preferably, the control method further includes the following steps:

[0021] When the battery pack is installed in the charging compartment, the station monitoring platform periodically sends a second message to the charger corresponding to the charging compartment.

[0022] After receiving the second message, the charger forwards the second message to the battery pack in the corresponding charging compartment.

[0023] The battery pack determines whether it periodically receives the second message. If not, it enters driving mode. If so, the battery pack determines whether it is in the battery swapping station charging mode. If not, it enters battery swapping station monitoring mode. If so, it maintains the battery swapping station charging mode.

[0024] In this scheme, the second message is used to enable battery packs located in the battery swapping station to know that they are within the station. Battery packs can only receive the second message periodically sent by the station's monitoring platform when they are inside the station. Conversely, if the battery pack is on a vehicle, it will not receive the second message. In this case, the battery pack can conclude that it is on a vehicle and thus set itself to driving mode. In this mode, the battery pack does not need to upload battery monitoring information, thereby avoiding the occupation of fieldbus communication bandwidth and reducing the fieldbus load rate. When the battery pack is inside the station, it will periodically receive the second message. The battery pack can determine its current mode: upon power-on, it enters the default mode, which is set according to specific requirements. In this case, upon receiving the second message, the battery pack directly enters the battery swapping station monitoring mode. If the battery pack learns that it is in the battery swapping station charging mode after receiving the second message, it maintains the battery swapping station charging mode and continues charging. If the battery pack is already in the battery swapping station monitoring mode, then entering the battery swapping station monitoring mode is equivalent to maintaining the battery swapping station monitoring mode. This depends on the specific implementation of the mode setting, which is a conventional technical method in this field and will not be elaborated here.

[0025] In this solution, the battery pack determining whether it is in the charging mode of the battery swapping station is a conventional technical means in this field, and there are many ways to achieve it. For example, it can be achieved by reading the mode value in the register, or by other methods, which will not be elaborated here.

[0026] In this solution, the battery pack can effectively identify whether it is inside the battery swapping station or on the vehicle by determining whether it receives a second message periodically sent by the station's monitoring platform. Specifically, if the battery pack does not receive the second message periodically, it is considered to be on the vehicle and in driving mode; if the battery pack does receive the second message periodically, it further determines whether it is in the charging mode of the battery swapping station. If so, it continues to charge; otherwise, it switches to the battery swapping station monitoring mode. This enables the battery to clearly know whether it is inside the battery swapping station or on the vehicle, effectively solving the problem of not being able to identify whether the battery is on the vehicle when the vehicle's communication fails.

[0027] Preferably, the control method further includes the following steps:

[0028] The on-site monitoring platform responds to the charging shutdown command and sends a third message to the charger.

[0029] After receiving the third message, the charger forwards the third message to the battery pack in the corresponding charging compartment.

[0030] Upon receiving the third message, the battery pack enters the battery swapping station monitoring mode.

[0031] This solution implements a method for exiting the charging mode of a battery swapping station. When the target battery has been fully charged or when the user wants to interrupt charging, the external system can issue a charge-off command to trigger the station's monitoring platform to send a third message to the target charger. The target charger then forwards the third message to the battery pack located in the charging compartment that corresponds to the target charger, thus causing the battery pack to exit the charging mode of the battery swapping station and enter the monitoring mode of the battery swapping station.

[0032] Preferably, the battery pack periodically sends battery monitoring information to the station monitoring platform when it is in the battery swapping station monitoring mode and the battery swapping station charging mode.

[0033] This solution enables swappable batteries to accurately identify whether they are inside the swappable station or on a vehicle. Based on this, when the battery is on a vehicle, the battery pack does not upload battery monitoring information, thus reducing the load on the fieldbus. Furthermore, this solution allows the battery pack to upload battery monitoring information to the station's monitoring platform to monitor battery status, regardless of whether it is being charged, as long as the battery pack is installed in the charging compartment of the swappable station.

[0034] The present invention also provides a control system for the working mode of the battery swapping station, including an in-station monitoring platform and several sets of one-to-one corresponding chargers and charging compartments, wherein the charger in each set is communicatively connected to the battery pack installed in the charging compartment; the in-station monitoring platform is communicatively connected to each charger.

[0035] The on-site monitoring platform is used to send power-on commands to the corresponding chargers;

[0036] The charger is used to control the battery pack in the corresponding charging compartment to be powered on at low voltage after receiving the power-on command;

[0037] The on-site monitoring platform is also used to respond to the charging start command and send a first message to the charger.

[0038] The charger is also used to forward the first message to the battery pack in the corresponding charging compartment after receiving the first message;

[0039] The battery pack is used to enter the battery swapping station charging mode after receiving the first message.

[0040] Preferably, the battery pack is also used to send battery monitoring information to the station monitoring platform when it is in the charging mode of the battery swapping station.

[0041] Preferably, when the battery pack is installed in the charging compartment, the station monitoring platform is also used to periodically send a second message to the charger corresponding to the charging compartment;

[0042] The charger is also used to forward the second message to the battery pack in the corresponding charging compartment after receiving the second message;

[0043] The battery pack is also used to determine whether the second message is received periodically. If not, it enters driving mode. If so, the battery pack is also used to determine whether it is in the battery swapping station charging mode. If not, it enters battery swapping station monitoring mode. If so, it maintains the battery swapping station charging mode.

[0044] Preferably, the on-site monitoring platform is also used to respond to a charging shutdown command by sending a third message to the charger;

[0045] The charger is also used to forward the third message to the battery pack in the corresponding charging compartment after receiving the third message;

[0046] The battery pack is also used to enter the battery swapping station monitoring mode after receiving the third message.

[0047] Preferably, the battery pack is also used to periodically send battery monitoring information to the station monitoring platform when in the station monitoring mode and the station charging mode.

[0048] The positive and progressive effects of this invention are as follows: The control method and system for the working mode of the battery in the battery swapping station provided by this invention enable the station monitoring platform to send a first message to the target charger, and the target charger to forward the first message to the battery pack located in the charging compartment corresponding to the target charger. This allows the battery pack to accurately determine when to enter the station charging mode for charging, replacing the existing A+ wake-up signal and CC2 charging connection signal provided by the charger to the battery pack. This simplifies the system design of the battery swapping station and reduces costs, while ensuring a better DC charging process within the station. Furthermore, it ensures that the battery only sends battery monitoring information to the monitoring platform when it is inside the battery swapping station, reducing the load rate of the fieldbus when the battery is charging on the vehicle. It also effectively solves the problem of not being able to identify that the battery is still on the vehicle when the vehicle communication fails. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the control system for the working mode of the battery swapping station in Embodiment 1 of the present invention.

[0050] Figure 2 This is a flowchart of the control method for the working mode of the battery in the battery swapping station according to Embodiment 2 of the present invention.

[0051] Figure 3 This is a flowchart of the control method for the working mode of the battery in the battery swapping station according to Embodiment 3 of the present invention.

[0052] Figure 4 This is a flowchart illustrating the decision-making process on the station monitoring platform side in an example based on the concept of this invention.

[0053] Figure 5 This is a flowchart illustrating the determination process on the charger side in an example based on the concept of this invention.

[0054] Figure 6 This is a flowchart illustrating the determination process on the battery pack side, based on an example of the present invention. Detailed Implementation

[0055] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0056] Example 1

[0057] like Figure 1 As shown in the figure, this embodiment provides a control system for the working mode of the battery swapping station, including an in-station monitoring platform 1 and several sets of corresponding chargers 2 and charging compartments 3. Only two sets are shown in the figure. In each set, the charger 2 is connected to the battery pack 4 installed in the charging compartment 3 through the corresponding charging compartment 3. The in-station monitoring platform 1 is connected to each charger 2.

[0058] In practice, the station monitoring platform 1 communicates with multiple chargers 2 via CAN (Controller Area Network) bus CAN1; each charger 2 communicates with the battery pack 4 installed in the charging compartment 3 via another CAN bus CAN0 through a quick-connect connector 5.

[0059] In this embodiment, the on-site monitoring platform 1 sends a power-on command to the corresponding charger 2. Upon receiving the power-on command, the charger 2 controls the battery pack 4 in the corresponding charging compartment 3 to be powered on at low voltage. After being powered on at low voltage, the battery pack 4 can receive and process various messages via the CAN bus. The on-site monitoring platform 1 also responds to external input charging start commands and sends a first message to the charger 2. The charger 2 forwards the first message to the battery pack 4 in the corresponding charging compartment 3 upon receiving it. Upon receiving the first message, the battery pack 4 communicates with the corresponding charger 2 to enter the battery swapping station charging mode.

[0060] In this embodiment, the on-site monitoring platform knows which charging compartment contains the battery pack. The platform also periodically sends a second message to the charger corresponding to the charging compartment containing the battery pack. The charger, upon receiving the second message, forwards it to the battery pack in the corresponding charging compartment.

[0061] In this embodiment, the battery pack will determine whether it is periodically receiving a second message, whether it is in the station or on the vehicle. If not, it will enter the driving mode, indicating that the battery pack is on the vehicle. If it is, the battery pack will further determine whether it is in the battery swapping station charging mode. If it is, it will continue to maintain the battery swapping station charging mode. If not, it will further determine whether it is in the battery swapping station monitoring mode. If not, it will enter the battery swapping station monitoring mode. If it is, it will continue to maintain the battery swapping station monitoring mode.

[0062] In this embodiment, the station monitoring platform is also used to respond to external input of a charge-off command and send a third message to the charger; the charger is also used to forward the third message to the battery pack in the corresponding charging compartment after receiving the third message; the battery pack is also used to enter the battery swapping station monitoring mode after receiving the third message.

[0063] In this embodiment, the battery pack is also used to periodically send battery monitoring information to the station monitoring platform when in the battery swapping station monitoring mode and the battery swapping station charging mode.

[0064] The control system for the working mode of the battery swapping station provided in this embodiment enables the station monitoring platform to send a first message to the target charger, and the target charger to forward the first message to the battery pack located in the charging compartment corresponding to the target charger. This allows the battery pack to effectively determine when to enter the station charging mode for charging, replacing the existing A+ wake-up signal and CC2 charging connection signal provided by the charger to the battery pack. This simplifies the system design of the swapping station and reduces costs, while also ensuring a good DC charging process within the swapping station.

[0065] In this embodiment, the battery pack can effectively identify whether it is inside the battery swapping station or on the vehicle by determining whether it receives a second message periodically sent by the station's monitoring platform. Specifically, if the battery pack does not receive the second message periodically, it is considered to be on the vehicle and in driving mode; if the battery pack receives the second message periodically, it further determines whether it is in the charging mode of the battery swapping station. If so, it continues to charge; otherwise, it switches to the battery swapping station monitoring mode. This enables the battery to clearly know whether it is inside the battery swapping station or on the vehicle, effectively solving the problem of not being able to identify whether the battery is on the vehicle when the vehicle communication fails. Based on this, the battery pack does not upload battery monitoring information when it is on the vehicle, thus reducing the load rate of the fieldbus. This embodiment also further enables the battery pack to upload monitoring data to the station's monitoring platform to monitor battery status as long as it is installed in the charging compartment of the battery swapping station, regardless of whether it is charging or not, thus meeting the requirement of the battery swapping station to effectively monitor each battery located therein.

[0066] Example 2

[0067] This embodiment provides a control method for the working mode of the battery in a battery swapping station, which is based on the control system for the working mode of the battery in a battery swapping station in Embodiment 1.

[0068] like Figure 2 As shown, the control method in this embodiment includes the following steps:

[0069] Step 101: The station monitoring platform sends a power-on command to the corresponding charger.

[0070] Step 102: After receiving the power-on command, the charger controls the battery pack in the corresponding charging compartment to be powered on at low voltage.

[0071] Step 103: The station monitoring platform responds to the charging start command and sends the first message to the charger.

[0072] Step 104: After receiving the first message, the charger forwards the first message to the battery pack in the corresponding charging compartment.

[0073] Step 105: After receiving the first message, the battery pack communicates with the corresponding charger to enter the battery swapping station charging mode.

[0074] Step 106: The station monitoring platform responds to the charging shutdown command and sends a third message to the charger.

[0075] Step 107: After receiving the third message, the charger forwards the third message to the battery pack in the corresponding charging compartment.

[0076] Step 108: After receiving the third message, the battery pack enters the battery swapping station monitoring mode.

[0077] In this embodiment, the battery pack periodically sends battery monitoring information to the station monitoring platform when it is in both the battery swapping station monitoring mode and the battery swapping station charging mode.

[0078] This embodiment, based on the hardware architecture of the control system within the battery swapping station, enables the station's monitoring platform to send a first message to the target charger. The target charger then forwards the first message to the battery pack located in the charging compartment corresponding to the target charger. This allows the battery pack to effectively determine when to enter the station's charging mode for charging, replacing the existing A+ wake-up signal and CC2 charging connection signal provided by the charger to the battery pack. This simplifies the system design of the battery swapping station and reduces costs while ensuring a good DC charging process within the station. Furthermore, it implements a method for exiting the charging mode of the battery swapping station. When the target battery has finished charging or when there is a desire to interrupt charging, an external command to stop charging can be issued, triggering the station's monitoring platform to send a third message to the target charger. The target charger then forwards the third message to the battery pack located in the charging compartment corresponding to the target charger, causing the battery pack to exit the charging mode and enter the station's monitoring mode.

[0079] Example 3

[0080] This embodiment provides a control method for the working mode of the battery in a battery swapping station, which is based on the control system for the working mode of the battery in a battery swapping station in Embodiment 1.

[0081] In this embodiment, the message ID (identifier) ​​of each message is a message ID for the target charger and the corresponding target battery pack. Byte 0 of the message is used to indicate the location of the battery. The default value of byte 0 is 0x00. When the value of byte 0 is 0x01, it means that the battery is located in the battery swapping station. Other values ​​are reserved. Byte 1 is used to indicate the battery charging on / off control command: when the value is 0x00, it means that charging is off. When the value is 0x01, it means that charging is on. Other values ​​are reserved.

[0082] like Figure 3 As shown, the control method in this embodiment includes the following steps:

[0083] Step 201: The station monitoring platform sends a power-on command to the corresponding charger to control the charger to provide low-voltage power to the battery pack in the charging compartment corresponding to the charger.

[0084] Step 202: After receiving the power-on command, the charger controls the battery pack in the corresponding charging compartment to be powered on at low voltage.

[0085] Step 203: After the battery pack is powered on at low voltage, the station monitoring platform will periodically send corresponding messages to the CAN1 network of the corresponding charger. When the charger receives a message with a message ID that is for the battery pack in the target charging compartment, it will forward the message received on the CAN1 network to the battery pack in the corresponding charging compartment. The battery pack will then process the message according to the different message content it receives.

[0086] The specific explanation is as follows:

[0087] When the battery pack is powered on at low voltage, the on-site monitoring platform will periodically send a message with the content of the second message to the target charger if no other instructions for operating the battery pack are received. When the battery pack recognizes the periodically received message as the second message, it will enter the battery swapping station monitoring mode. In the second message, byte 0 has a value of 0x01, and byte 1 has a value of 0x00.

[0088] When the on-site monitoring platform receives an external command to start charging (such as a user swiping a card to charge), it will respond to the command. At this time, the on-site monitoring platform will periodically send a message with the content of the first message to the target charger. When the battery pack recognizes the periodically received message as the first message, it will further determine whether the battery pack is in the battery swapping station charging mode. If not, it will enter the battery swapping station monitoring mode; if so, it will maintain the battery swapping station charging mode. In the first message, the value of byte 0 is 0x01, and the value of byte 1 is 0x01.

[0089] When the station's monitoring platform receives an external command to stop charging (such as a user swiping their card again to end charging), it will respond to the command. At this time, the content of the messages periodically sent by the station's monitoring platform is the third message. When the battery pack recognizes that the periodically received messages are the third message, it will enter the battery swapping station monitoring mode. In the third message, the value of byte 0 is 0x01, and the value of byte 1 is 0x00.

[0090] The control method in this embodiment further includes the following steps:

[0091] Whether the battery pack is in the battery swapping station or on the vehicle, it will periodically check if it receives relevant messages. If no messages are received, it will enter driving mode; if messages are received, it will refer to the aforementioned message contents to set the appropriate mode. This ensures that the battery can be charged normally while effectively solving the problem of not being able to recognize that the battery is still on the vehicle when the vehicle's communication fails.

[0092] In this embodiment, the battery pack periodically sends battery monitoring information to the station monitoring platform when it is in both the battery swapping station monitoring mode and the battery swapping station charging mode.

[0093] The control method for the working mode of the battery swapping station provided in this embodiment enables the station monitoring platform to send a first message to the target charger, which then forwards the first message to the battery pack located in the charging compartment corresponding to the target charger. This allows the battery pack to effectively determine when to enter the station charging mode for charging, replacing the existing A+ wake-up signal and CC2 charging connection signal provided by the charger to the battery pack. This simplifies the system design of the battery swapping station and reduces costs while ensuring a good DC charging process within the station. Furthermore, it ensures that the battery only sends battery monitoring information to the monitoring platform when it is within the station, reducing the load on the fieldbus when the battery is charging on the vehicle. It also effectively solves the problem of not being able to recognize that the battery is still on the vehicle when the vehicle communication fails.

[0094] The technical solution and technical effects of the present invention will be further illustrated below through specific examples.

[0095] Figures 4 to 6 This paper illustrates the process for determining the working mode of a station monitoring platform, a charger, and a battery pack from three perspectives, based on an example of the present invention.

[0096] The message ID for a particular charger and the corresponding battery pack in the charging compartment is 0x18718056.

[0097] Figure 4This is a flowchart illustrating the control process of the on-site monitoring platform in implementing the working mode of the swapped batteries within the battery swapping station. Specifically, when the on-site monitoring platform learns that a battery pack has been installed in a target charging compartment, it sends a low-voltage power-on command to the charger corresponding to that target charging compartment. This commands the charger to provide low-voltage power to the battery pack in the corresponding charging compartment, enabling the BMS (Battery Management System) within the battery pack to function normally. Subsequently, the station's monitoring platform periodically (every 100 milliseconds) sends a message with ID 0x18718056, where Byte 0 is 0x01 and Byte 1 is 0x00, to the corresponding charger's CAN1 network. The monitoring platform then periodically checks if there are any external commands requiring the battery to start charging. If not, it continues to periodically send a message with ID 0x18718056, where Byte 0 is 0x01 and Byte 1 is 0x00, to the corresponding charger's CAN1 network. If so, it periodically sends a message with ID 0x18718056, where Byte 0 is 0x01 and Byte 1 is 0x01, to the corresponding charger's CAN1 network, thus enabling the corresponding battery pack to enter the battery swapping station's charging mode. Next, the station's monitoring platform periodically checks if there are any external commands requiring the battery to stop charging. If not, it continues to periodically send a message with ID 0x18718056, where byte 0 is 0x01 and byte 1 is 0x01, to the corresponding charger's CAN1 network. If so, it periodically sends a message with ID 0x18718056, where byte 0 is 0x01 and byte 1 is 0x00, to the corresponding charger's CAN1 network to stop the battery pack from charging, exit the battery swapping station charging mode, and enter the battery swapping station monitoring mode, repeating this cycle continuously.

[0098] Figure 5 This is a flowchart illustrating the control process of the charger in implementing the working mode of the battery swapping station. Specifically, after receiving the low-voltage power-on command from the station's monitoring platform, the charger controls the corresponding battery pack in the charging compartment to be powered on at low voltage. Then, it listens to the CAN1 network to see if it receives a message with message ID 0x18718056. If not, it continues to listen; if it does, it forwards the message with message ID 0x18718056 received on the CAN1 network to the corresponding battery pack on the CAN0 network in real time.

[0099] Figure 6This is a flowchart illustrating the control process of the battery pack in achieving the working mode of battery swapping within a battery swapping station. Specifically, the charger controls the battery pack to power on at low voltage according to the received instructions. After power-on, the BMS in the battery pack enters normal operating mode. After low-voltage power-on, the BMS checks whether it periodically receives a message with ID 0x18718056 and byte 0 of the message being 0x01, indicating that the battery is within the battery swapping station. If not, it means that the battery is currently on the vehicle and in driving mode. If it does receive such a message, it means that the battery is within the battery swapping station and enters the battery swapping station monitoring mode. The BMS in the battery pack continues to check whether it periodically receives a message with ID 0x18718056 and byte 0 and byte 1 of the message being 0x01. If a message is received, the system begins handshaking communication with the charger and enters the battery swapping station charging mode. If not, the system continues to check if it periodically receives a message with ID 0x18718056 and byte 0 of the message being 0x01 and byte 1 being 0x00. Otherwise, the system loops through the previous process of checking if it periodically receives a message with ID 0x18718056 and byte 0 of the message being 0x01 and byte 1 being 0x01. If it does receive a message with ID 0x18718056 and byte 0 of the message being 0x01, the system loops through the previous process of checking if it periodically receives a message with ID 0x18718056 and byte 0 of the message being 0x01, which means the battery is inside the battery swapping station.

[0100] This example simplifies the structural design of battery swapping stations and reduces costs. It adds a battery swapping station mode, ensuring that battery monitoring information is only sent to the station's monitoring platform when the battery is within the swapping station, reducing CAN network consumption when the battery is on the vehicle. It also effectively distinguishes between normal and abnormal vehicle communication loss. Furthermore, it adds a swapping station charging mode and a swapping station monitoring mode to simulate the A+ wake-up signal and CC2 connection confirmation signal provided by the charger, clearly defining the conditions for entering and exiting DC charging.

[0101] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A control method for the operating mode of batteries in a battery swapping station, characterized in that, The control method is applied to a battery swapping station, which includes an in-station monitoring platform and several sets of one-to-one corresponding chargers and charging compartments. The charger in each set is communicatively connected to the battery pack installed in the charging compartment; the in-station monitoring platform is communicatively connected to each charger. The control method includes the following steps: The station monitoring platform sends a power-on command to the corresponding charger. Upon receiving the power-on command, the charger controls the battery pack in the corresponding charging compartment to be powered on at low voltage. The on-site monitoring platform responds to the charging start command and sends a first message to the charger. After receiving the first message, the charger forwards the first message to the battery pack in the corresponding charging compartment, so that the battery pack can enter the battery swapping station charging mode after receiving the first message. The on-site monitoring platform responds to the charging shutdown command and sends a third message to the charger. After receiving the third message, the charger forwards the third message to the corresponding battery pack in the charging compartment, so that the battery pack can enter the battery swapping station monitoring mode after receiving the third message.

2. The control method for the working mode of the battery swapping station as described in claim 1, characterized in that, The control method further includes the following steps: When the battery pack is installed in the charging compartment, the station monitoring platform periodically sends a second message to the charger corresponding to the charging compartment. After receiving the second message, the charger forwards the second message to the corresponding battery pack in the charging compartment, so that the battery pack can determine whether the battery pack is in the battery swapping station.

3. A control method for the operating mode of batteries in a battery swapping station, characterized in that, The control method is applied to a battery pack, wherein the battery pack in the charging compartment is communicatively connected to a charger corresponding to each charging compartment, the charging compartment and the charger are located within a battery swapping station, and the battery swapping station also includes an in-station monitoring platform; the control method includes the following steps: The battery pack in the charging compartment enters low-voltage power-on mode after receiving a power-on command from the corresponding charger; the power-on command is sent to the charger by the on-site monitoring platform. The battery pack enters the battery swapping station charging mode after receiving the first message forwarded by the charger; the first message is sent to the charger by the station monitoring platform in response to the charging start command. After receiving the third message forwarded by the charger, the battery pack enters the battery swapping station monitoring mode; the third message is sent to the charger by the station monitoring platform in response to the charging shutdown command.

4. The control method for the working mode of the battery swapping station as described in claim 3, characterized in that, The control method further includes the following steps: When the battery pack is in the charging mode of the battery swapping station, it sends battery monitoring information to the station's monitoring platform.

5. The control method for the working mode of the battery swapping station as described in claim 3, characterized in that, The control method further includes the following steps: The battery pack determines whether it is periodically receiving a second message to determine whether it is within the battery swapping station. If the battery pack determines that it has not periodically received the second message, it enters the driving mode. If the battery pack determines that it has periodically received the second message, it determines whether it is in the battery swapping station charging mode. If not, it enters the battery swapping station monitoring mode. If so, it maintains the battery swapping station charging mode.

6. The control method for the working mode of the battery swapping station as described in claim 5, characterized in that, When the battery pack is in the battery swapping station monitoring mode or the battery swapping station charging mode, it periodically sends battery monitoring information to the station's monitoring platform.

7. A control system for the operating mode of batteries in a battery swapping station, characterized in that, The control system is applied to a battery swapping station, which includes an in-station monitoring platform and several sets of one-to-one corresponding chargers and charging compartments. The chargers in each set are communicatively connected to the battery packs installed in the charging compartments. The in-station monitoring platform is communicatively connected to each of the chargers. The on-site monitoring platform is used to send power-on commands to the corresponding chargers; The charger is used to control the battery pack in the corresponding charging compartment to be powered on at low voltage after receiving the power-on command; The on-site monitoring platform is also used to respond to the charging start command and send a first message to the charger. The charger is also used to forward the first message to the battery pack in the corresponding charging compartment after receiving the first message, so that the battery pack can enter the battery swapping station charging mode after receiving the first message; The on-site monitoring platform is also used to respond to a charging shutdown command and send a third message to the charger. The charger is also used to forward the third message to the corresponding battery pack in the charging compartment after receiving the third message, so that the battery pack can enter the battery swapping station monitoring mode after receiving the third message.

8. The control system for the working mode of the battery swapping station as described in claim 7, characterized in that, When the battery pack is installed in the charging compartment, the station monitoring platform is also used to periodically send a second message to the charger corresponding to the charging compartment; The charger is also used to forward the second message to the corresponding battery pack in the charging compartment after receiving the second message, so that the battery pack can determine whether the battery pack is in the battery swapping station.

9. A control system for the operating mode of batteries in a battery swapping station, characterized in that, The control system is applied to the battery pack; the battery pack in the charging compartment and the charger corresponding to the charging compartment are communicatively connected, the charging compartment and the charger are located in the battery swapping station, and the battery swapping station also includes an in-station monitoring platform; The battery pack in the charging compartment enters low-voltage power-on mode after receiving a power-on command from the corresponding charger; the power-on command is sent to the charger by the on-site monitoring platform. The battery pack is used to enter the battery swapping station charging mode after receiving a first message forwarded by the charger; the first message is sent to the charger by the station monitoring platform in response to the charging start command. The battery pack is also used to enter the battery swapping station monitoring mode after receiving a third message forwarded by the charger; the third message is sent to the charger by the station monitoring platform in response to the charging shutdown command.

10. The control system for the working mode of the battery swapping station as described in claim 9, characterized in that, The battery pack is also used to send battery monitoring information to the station's monitoring platform when it is in the charging mode of the battery swapping station.

11. The control system for the working mode of the battery swapping station as described in claim 9, characterized in that, The battery pack is also used to determine whether a second message is received periodically, so as to determine whether the battery pack is in the battery swapping station. If the battery pack determines that it has not periodically received the second message, it enters driving mode. If the battery pack determines that it has periodically received the second message, the battery pack is also used to determine whether it is in the battery swapping station charging mode. If not, it enters the battery swapping station monitoring mode. If so, it maintains the battery swapping station charging mode.

12. The control system for the working mode of the battery swapping station as described in claim 11, characterized in that, The battery pack is also used to periodically send battery monitoring information to the station monitoring platform when it is in the station monitoring mode and the station charging mode.

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