Battery coolant control system, method, and vehicle

Abstract

The application provides a battery cooling liquid control system and method and a vehicle, and relates to the field of vehicle control.The method comprises the following steps: a control unit sends a self-circulation instruction to a circulating water pump and controls the circulating water pump to operate when the control unit receives a target operation instruction and the current running state of the vehicle meets a first trigger condition; the control unit judges whether a target operation corresponding to the target operation instruction is completed based on a judgment condition corresponding to the target operation instruction; and the control unit sends a stop instruction to the circulating water pump and controls the circulating water pump to stop operating when the target operation is completed.The battery cooling liquid control system and method and the vehicle provided by the application are used to solve the technical problem that the filling operation and the liquid discharge operation of the battery cooling liquid are complex and have a high cost in the prior art.

Description

Technical Field

[0001] This application relates to the field of vehicle control, and more particularly to a battery coolant control system, method, and vehicle. Background Technology

[0002] For electric vehicles, the operating state of the power battery directly affects the vehicle's power performance, economy, safety, and lifespan. To ensure that the battery is always in the best working condition, the battery temperature needs to be controlled by the battery coolant.

[0003] In related technologies, the filling of battery coolant is usually done using a vacuum filling method, that is, adding coolant to the battery liquid cooling system while simultaneously creating a vacuum. The draining of battery coolant can be achieved by pressurizing the pipes within the battery liquid cooling system.

[0004] However, this refueling method requires specialized refueling equipment, which is costly. It is not only complicated to operate, but also requires refueling at after-sales service, causing inconvenience to users. Summary of the Invention

[0005] The purpose of this application is to provide a battery coolant control system, method, and vehicle to solve the technical problems of complex and costly battery coolant filling and draining operations in related technologies.

[0006] This application provides a battery coolant control system, including:

[0007] The system includes a control unit, a circulating water pump, and an expansion tank. The circulating water pump controls the flow of coolant in the battery liquid cooling system. The expansion tank adds coolant to the battery liquid cooling system. The control unit sends a self-circulation command to the circulating water pump to control its operation when it receives a target operation command and the vehicle's current operating state meets a first trigger condition. The target operation command includes any one of the following: a filling command or a draining command. The control unit is also used to determine whether a target operation corresponding to the target operation command has been completed based on a judgment condition corresponding to the target operation command. Furthermore, the control unit sends a stop command to the circulating water pump to stop its operation when the target operation is completed. The target operation includes any one of the following: a filling operation or a draining operation. When the target operation includes the filling operation, the system determines whether the filling is completed based on the change in the liquid level in the expansion tank. When the target operation includes the draining operation, the system determines whether the draining is completed based on an idling signal sent by the circulating water pump.

[0008] Optionally, the control unit is specifically configured to send the self-circulation command to the circulating water pump and control the operation of the circulating water pump when it receives the refueling command, the current operating state of the vehicle meets the first triggering condition, and the liquid level of the expansion tank is greater than the preset liquid level.

[0009] Optionally, the battery coolant control system further includes: a drain valve; the drain valve is located at the outlet of the circulating water pump; the coolant in the battery liquid cooling system is discharged through the drain valve; the control unit is specifically used to send the self-circulation command to the circulating water pump and control the operation of the circulating water pump when receiving the drain command, the current operating state of the vehicle meets the first triggering condition, and the drain valve is in the open state.

[0010] Optionally, the control unit is specifically configured to determine that the filling operation is completed if the liquid level change in the expansion tank meets a second triggering condition when the target operation includes the filling operation; wherein the second triggering condition includes: the liquid level fluctuation value of the expansion tank is less than a preset fluctuation threshold and lasts for a preset duration.

[0011] Optionally, the control unit is specifically configured to determine that the drainage operation is completed if it receives an idling signal sent by the circulating water pump when the target operation includes the drainage operation.

[0012] Optionally, the control unit includes: a vehicle controller (VCU), a battery management system (BMS), and a thermal management system (TMS); the VCU is configured to send first control information to the BMS when it receives the target operation command and the current operating state of the vehicle meets the first triggering condition; the BMS is configured to stop the thermal management control of the battery cooling system and send second control information to the TMS when it receives the first control information; the TMS is configured to send the self-circulation command to the circulating water pump when it receives the second control information; wherein, the first triggering condition includes at least one of the following: the vehicle is in an energized position, the vehicle is in a braking state, and the vehicle is in a parked state.

[0013] Optionally, the vehicle control unit (VCU) is further configured to send a first termination command to the battery management system (BMS) upon meeting a third triggering condition; the BMS is further configured to, upon receiving the first termination command, resume thermal management control of the battery cooling system and send a second termination command to the thermal management system (TMS); the TMS is further configured to, upon receiving the second termination command, send a stop command to the circulating water pump to control the circulating water pump to stop operating; wherein, the third triggering condition includes at least one of the following: the vehicle is in a de-energized state, the vehicle is not in a braking state, the vehicle speed is greater than zero, and the target operation is completed.

[0014] Optionally, the battery coolant control system further includes: an operation unit and a reminder unit; the operation unit is used to send a target control command corresponding to the target input to the vehicle controller (VCU) in response to the target input on the control panel; the reminder unit is used to display operation information corresponding to the target operation on the control panel based on the reminder information sent by the vehicle controller (VCU) during the execution of the target operation; wherein, the operation information includes any one of the following: status information of the filling operation, status information of the draining operation.

[0015] This application also provides a battery coolant control method, including:

[0016] When the control unit receives a target operation command and the current operating state of the vehicle meets the first triggering condition, it sends a self-circulation command to the circulating water pump to control the operation of the circulating water pump. Based on the judgment condition corresponding to the target operation command, the control unit determines whether the target operation corresponding to the target operation command has been completed. If the target operation is completed, the control unit sends a stop command to the circulating water pump to control it to stop operating. The target operation includes any one of the following: a filling operation or a draining operation. If the target operation includes the filling operation, the control unit determines whether the filling is complete based on the change in the liquid level in the expansion tank. If the target operation includes the draining operation, the control unit determines whether the draining is complete based on the idling signal sent by the circulating water pump.

[0017] Optionally, when the control unit receives the target operation command and the current operating state of the vehicle meets the first triggering condition, it sends a self-circulation command to the circulating water pump to control the operation of the circulating water pump. This includes: when the control unit receives the filling command, the current operating state of the vehicle meets the first triggering condition, and the liquid level in the expansion tank is greater than a preset liquid level, it sends the self-circulation command to the circulating water pump to control the operation of the circulating water pump.

[0018] Optionally, when the control unit receives the target operation command and the current operating state of the vehicle meets the first triggering condition, it sends a self-circulation command to the circulating water pump to control the operation of the circulating water pump. This includes: when the control unit receives the drain command, the current operating state of the vehicle meets the first triggering condition, and the drain valve is in the open state, it sends the self-circulation command to the circulating water pump to control the operation of the circulating water pump.

[0019] Optionally, when the target operation is completed, the control unit sends a stop command to the circulating water pump to control the circulating water pump to stop running, including: when the target operation includes the filling operation, if the liquid level change in the expansion tank meets a second trigger condition, the control unit determines that the filling operation is completed; wherein, the second trigger condition includes: the liquid level fluctuation value in the expansion tank is less than a preset fluctuation threshold and lasts for a preset duration.

[0020] Optionally, when the target operation is completed, the control unit sends a stop command to the circulating water pump to control the circulating water pump to stop running, including: when the target operation includes the drainage operation, if the control unit receives an idling signal sent by the circulating water pump, it determines that the drainage operation is completed.

[0021] Optionally, the control unit includes: a vehicle controller (VCU), a battery management system (BMS), and a thermal management system (TMS); when the control unit receives a target operation command and the current operating state of the vehicle meets a first trigger condition, it sends a self-circulation command to the circulating water pump to control the operation of the circulating water pump, including: when the vehicle controller (VCU) receives the target operation command and the current operating state of the vehicle meets the first trigger condition, it sends first control information to the battery management system (BMS); when the battery management system (BMS) receives the first control information, it stops the thermal management control of the battery cooling system and sends second control information to the thermal management system (TMS); when the thermal management system (TMS) receives the second control information, it sends the self-circulation command to the circulating water pump; wherein, the first trigger condition includes at least one of the following: the vehicle is in an energized position, the vehicle is in a braking state, and the vehicle is in a parked state.

[0022] Optionally, when the target operation is completed, the control unit sends a stop command to the circulating water pump to control the circulating water pump to stop running, including: the vehicle controller (VCU) sending a first termination command to the battery management system (BMS) when a third trigger condition is met; the BMS resuming thermal management control of the battery cooling system upon receiving the first termination command and sending a second termination command to the thermal management system (TMS); and the TMS sending a stop command to the circulating water pump upon receiving the second termination command to control the circulating water pump to stop running; wherein the third trigger condition includes at least one of the following: the vehicle is in a de-energized state, the vehicle is not in a braking state, the vehicle speed is greater than zero, and the target operation is completed.

[0023] Optionally, the battery coolant control system further includes: an operation unit and a reminder unit; before the control unit sends a self-circulation command to the circulating water pump, the method further includes: the operation unit, in response to a target input on the control panel, sends a target control command corresponding to the target input to the vehicle controller (VCU); before the control unit sends a stop command to the circulating water pump to stop operation after the target operation is completed, the method further includes: during the execution of the target operation, the reminder unit displays operation information corresponding to the target operation on the control panel based on the reminder information sent by the vehicle controller (VCU); wherein the operation information includes any one of the following: status information of the filling operation, status information of the draining operation.

[0024] This application also provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of the battery coolant control method as described above.

[0025] This application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of any of the battery coolant control methods described above.

[0026] This application also provides a vehicle including a battery coolant control system as described in any of the above.

[0027] This application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the battery coolant control methods described above.

[0028] The battery coolant control system, method, and vehicle provided in this application include: a control unit sending a self-circulation command to a circulating water pump to control the operation of the circulating water pump when it receives a target operation command and the current operating state of the vehicle meets a first triggering condition; the control unit determining whether the target operation corresponding to the target operation command has been completed based on a judgment condition corresponding to the target operation command; and the control unit sending a stop command to the circulating water pump to stop its operation when the target operation is completed. This allows users to manually add and drain battery coolant, which is not only simple to operate but also inexpensive. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the battery coolant control system provided in this application.

[0031] Figure 2 This is one of the flowcharts illustrating the battery coolant control method provided in this application;

[0032] Figure 3 This is a schematic diagram of the control unit of the battery coolant control system provided in this application;

[0033] Figure 4 This is the second flowchart of the battery coolant control method provided in this application;

[0034] Figure 5 This is a schematic diagram of the structure of the electronic device provided in this application. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0037] The following explains the technical terms used in the embodiments of this application:

[0038] The Vehicle Control Unit (VCU) is an electronic control unit that makes decisions regarding vehicle control. The VCU can determine the driver's intentions by collecting signals from the accelerator pedal, gear position, and brake pedal. It can also monitor vehicle status information (speed, temperature, etc.), process the data, and then send vehicle operation control commands to the powertrain and battery systems.

[0039] Battery Management System (BMS): Primarily used for intelligent management and maintenance of individual battery cells, preventing overcharging and over-discharging, extending battery life, and monitoring battery status.

[0040] Thermal Management System (TMS): This system is used for temperature control of the power battery and specifically executes the control commands issued by the Battery Management System (BMS).

[0041] To address the technical problems of complex and costly battery coolant filling and draining operations in related technologies, such as... Figure 1 As shown in the illustration, this application provides a battery coolant control system. The system includes: a control unit, a circulating water pump, an expansion tank, and a drain valve. The circulating water pump controls the flow of coolant in the battery cooling system. The expansion tank adds coolant to the battery cooling system. The drain valve is located at the outlet of the circulating water pump, and the coolant in the battery cooling system is discharged through the drain valve. This system allows users to add and drain battery coolant themselves, which is not only simple to operate but also inexpensive.

[0042] The battery coolant control method provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0043] Based on such Figure 1 The battery coolant control system shown is as follows: Figure 2 As shown in the embodiment of this application, a battery coolant control method is provided, which may include the following steps 201 to 203:

[0044] Step 201: When the control unit receives the target operation command and the current operating state of the vehicle meets the first triggering condition, it sends a self-circulation command to the circulating water pump to control the operation of the circulating water pump.

[0045] The target operation command includes any one of the following: injection command, drainage command.

[0046] For example, a user can trigger the aforementioned target operation command by operating the control panel in the vehicle's driver's cab. The target operation command can be a command to add coolant to the battery liquid cooling system or a command to drain coolant from the battery liquid cooling system.

[0047] For example, the first triggering condition mentioned above includes at least one of the following: the vehicle is in an energized position, the vehicle is in a braking state, or the vehicle is in a stationary state. After receiving the target operation command, the control unit first needs to determine whether the vehicle's current operating state meets the conditions for adding or draining fluid. If the vehicle's current operating state meets the conditions for adding or draining fluid, the subsequent adding or draining operation can be executed. Otherwise, the user needs to be reminded which conditions are not met, so that the user can eliminate all factors that prevent the vehicle from performing the adding or draining operation based on the reminder.

[0048] Specifically, for the case where the target operation is a refilling operation, step 201 above may include the following step 201a:

[0049] Step 201a: When the control unit receives the refilling command, the current operating state of the vehicle meets the first triggering condition, and the liquid level in the expansion tank is greater than the preset liquid level, it sends the self-circulation command to the circulating water pump to control the operation of the circulating water pump.

[0050] For example, when the control unit receives a refill command, it needs to determine whether the current operating state of the vehicle meets the first trigger condition and whether the liquid level in the expansion tank is greater than the preset liquid level. If so, a self-circulation command is sent to the circulating water pump to add coolant to the battery liquid cooling system.

[0051] It should be noted that when adding coolant, the control unit also needs to determine whether the drain valve is open. Only when the drain valve is closed will the control unit send a self-circulation command to the circulating water pump to prevent coolant leakage.

[0052] It should be noted that since the battery liquid cooling system is a closed system, when adding coolant, the gas in the pipeline needs to be discharged through the vent. This vent can be set at a target location, which is the position above the coolant level after the coolant has been added.

[0053] Specifically, for cases where the target operation is a drainage operation, step 201 above may include the following step 201b:

[0054] Step 201b: When the control unit receives the drain command, the current operating state of the vehicle meets the first triggering condition, and the drain valve is in the open state, it sends the self-circulation command to the circulating water pump to control the operation of the circulating water pump.

[0055] For example, when the control unit receives the drain command, it needs to determine whether the current operating state of the vehicle meets the first trigger condition and whether the drain valve is in the open state. If so, a self-circulation command is sent to the circulating water pump to add liquid to the battery cooling system.

[0056] Understandably, the aforementioned drain valve can be installed near the outlet of the circulating water pump. When the drain valve is opened, the coolant in the battery liquid cooling system will continuously flow out from the drain valve as the circulating water pump operates.

[0057] Step 202: The control unit determines whether the target operation corresponding to the target operation instruction has been completed based on the judgment conditions corresponding to the target operation instruction.

[0058] The target operation includes any one of the following: filling operation, draining operation; when the target operation includes the filling operation, the filling is determined to be complete based on the liquid level change in the expansion tank; when the target operation includes the draining operation, the draining is determined to be complete based on the idling signal sent by the circulating water pump.

[0059] For example, when the current operating state of the vehicle meets the first triggering condition, the control unit can send a self-circulation command to the circulating water pump of the battery liquid cooling system to control the operation of the circulating water pump so that the coolant in the expansion tank can enter the battery liquid cooling system, or so that the coolant in the battery liquid cooling system can be discharged.

[0060] It should be noted that when adding coolant to the battery liquid cooling system, the user needs to manually add coolant to the expansion tank; when draining coolant from the battery liquid cooling system, the user needs to open the drain valve of the battery liquid cooling system.

[0061] It is understood that the above judgment conditions may include a first judgment condition corresponding to the filling command and a second judgment condition corresponding to the draining command. The first judgment condition includes determining whether filling is complete based on the change in the liquid level in the expansion tank; the second judgment condition includes determining whether draining is complete based on the idling signal sent by the circulating water pump. That is, the control unit determines whether the filling and draining operations are complete based on different judgment conditions.

[0062] Step 203: When the target operation is completed, the control unit sends a stop command to the circulating water pump to control the circulating water pump to stop running.

[0063] For example, when the filling operation is determined to be completed based on the first judgment condition, or the draining operation is determined to be completed based on the second judgment condition, a stop command can be sent to the circulating water pump to stop the filling operation or the draining operation.

[0064] Specifically, for the case where the target operation is a refilling operation, step 203 may include the following step 203a:

[0065] Step 203a: If the change in the liquid level of the expansion tank meets the second triggering condition when the target operation includes the filling operation, the control unit determines that the filling operation is completed.

[0066] The second triggering condition includes: the liquid level fluctuation value of the expansion tank is less than a preset fluctuation threshold and lasts for a preset duration.

[0067] Understandably, during the coolant filling process, the user needs to add coolant to the expansion tank. Simultaneously, due to the operation of the circulating water pump and the impact of adding coolant on the tank level, the coolant level in the expansion tank will fluctuate within a considerable range. When the coolant is full, the level in the expansion tank will no longer drop, at which point the user stops adding coolant, and the level will either stop fluctuating or fluctuate only slightly. Based on this, it can be determined whether the coolant filling operation is complete.

[0068] It should be noted that in order to monitor changes in the liquid level in the expansion tank, a corresponding sensor needs to be installed in the expansion tank.

[0069] Specifically, for cases where the target operation is a drainage operation, step 203 above may include the following step 203b:

[0070] Step 203b: If the control unit receives an idling signal from the circulating water pump when the target operation includes the drainage operation, then the drainage operation is determined to be completed.

[0071] It is understandable that if all the coolant in the battery liquid cooling system has been drained, it will trigger the circulating water pump to generate an idling signal. Based on this, the completion of the draining operation can be determined by whether or not this idling signal is received.

[0072] Thus, based on the above steps, the automatic monitoring and control of coolant filling and draining operations can be achieved, enabling users to complete the coolant filling and draining operations themselves.

[0073] Optionally, in the embodiments of this application, the control unit described above may be a unit integrating multiple subsystems. For example... Figure 3 As shown, the control unit may include: vehicle controller (VCU), battery management system (BMS), and thermal management system (TMS).

[0074] Specifically, based on such Figure 3 The structure shown above, step 201, may include steps 201c1 to 201c3:

[0075] Step 201c1: When the vehicle controller (VCU) receives the target operation command and the current operating state of the vehicle meets the first triggering condition, it sends the first control information to the battery management system (BMS).

[0076] Step 201c2: Upon receiving the first control information, the battery management system (BMS) stops the thermal management control of the battery cooling system and sends the second control information to the thermal management system (TMS).

[0077] It should be noted that when performing coolant filling or draining operations, the Battery Management System (BMS) needs to suspend thermal management control of the battery cooling system to avoid generating unnecessary fault alerts.

[0078] Step 201c3: Upon receiving the second control information, the thermal management system (TMS) sends the self-circulation command to the circulating water pump.

[0079] The first triggering condition includes at least one of the following: the vehicle is in the energized position, the vehicle is in the braking state, or the vehicle is in the parked state.

[0080] It is understood that in the control unit of this application embodiment, all logical processing steps are executed by the vehicle controller (VCU). The battery management system (BMS) forwards control commands issued by the vehicle controller to the thermal management system (TMS), which then executes them. Simultaneously, the status information of the BMS and TMS can also be transmitted back to the VCU via the aforementioned path, and the VCU then sends the corresponding status information to the control panel. The control panel then displays this status information in real time.

[0081] Specifically, step 203 above may also include steps 203c1 to 203c3:

[0082] Step 203c1: When the third trigger condition is met, the vehicle controller (VCU) sends a first termination command to the battery management system (BMS).

[0083] Step 203c2: Upon receiving the first termination command, the Battery Management System (BMS) resumes thermal management control of the battery cooling system and sends a second termination command to the Thermal Management System (TMS).

[0084] Step 203c3: Upon receiving the second termination command, the thermal management system (TMS) sends a stop command to the circulating water pump to control the circulating water pump to stop operating.

[0085] The third triggering condition includes at least one of the following: the vehicle is not powered on, the vehicle is not in a braking state, the vehicle speed is greater than zero, and the target operation is completed.

[0086] It is understandable that if the current operating status of the vehicle does not meet any of the first triggering conditions mentioned above, or if the above-mentioned filling and draining operations are completed, the circulating water pump can be controlled to stop running.

[0087] Optionally, in this embodiment of the application, the user can control the vehicle to perform filling and draining operations through the vehicle's control panel. At the same time, during the filling or draining of coolant, the status information can also be displayed in real time through the control panel.

[0088] For example, the battery coolant control system further includes an operation unit and a reminder unit. Before step 201 above, the battery coolant control method provided in this application embodiment may also include the following step 204:

[0089] Step 204: In response to the target input on the control panel, the operation unit sends a target control command corresponding to the target input to the vehicle controller (VCU).

[0090] For example, the target input mentioned above is the input of the driver or operator on the control target, which can be voice input, touch input, etc.

[0091] For example, prior to step 203 above, the battery coolant control method provided in this application embodiment may further include the following step 205:

[0092] Step 205: During the execution of the target operation, the reminder unit displays operation information corresponding to the target operation on the control panel based on the reminder information sent by the vehicle controller (VCU).

[0093] The operation information includes any one of the following: status information of the filling operation, and status information of the draining operation.

[0094] For example, the control panel described above is a display panel in the driver's cab of a vehicle used to display various status information of the vehicle and to control the vehicle.

[0095] For example, such as Figure 4 The diagram illustrates the process of adding coolant. After the user triggers the adding operation via the control panel, a adding command is sent to the vehicle control unit (VCU). Upon receiving the command, the VCU determines if the adding conditions are met, such as whether the handbrake is engaged or the vehicle is in the ON position. If the conditions are met, the VCU sends a command to the power management system (BMS). The BMS, upon receiving this command, determines if the vehicle is in thermal management or charging mode. If so, it needs to pause or exit these modes. Simultaneously, the BMS ignores any fault information from the thermal management system (TMS) and forcibly sends a command to the TMS. Upon receiving the command from the BMS, the TMS sends a self-circulation command to the water pump. Once the water pump starts self-circulation, the operator can add coolant to the expansion tank until adding is complete. When the VCU determines that the coolant addition is complete, it sends the corresponding status information to the control panel.

[0096] The battery coolant control method provided in this application involves a control unit sending a self-circulation command to the circulating water pump to control its operation when it receives a target operation command and the vehicle's current operating state meets a first triggering condition. The control unit then determines whether the target operation corresponding to the target operation command has been completed based on a judgment condition. If the target operation is completed, the control unit sends a stop command to the circulating water pump to stop its operation. This allows users to manually add and drain battery coolant, simplifying the process and reducing costs.

[0097] It should be noted that the battery coolant control method provided in this application embodiment can be executed by a battery coolant filling device, or a control module in the battery coolant filling device for executing the battery coolant control method. This application embodiment uses the execution of the battery coolant control method by a battery coolant filling device as an example to illustrate the battery coolant filling device provided in this application embodiment.

[0098] It should be noted that, in the embodiments of this application, the battery coolant control methods shown in the accompanying drawings are all illustrated by way of example with reference to one of the accompanying drawings in the embodiments of this application. In specific implementation, the battery coolant control methods shown in the accompanying drawings of the above methods can also be implemented in conjunction with any other accompanying drawings shown in the above embodiments, which will not be elaborated here.

[0099] The battery coolant filling device provided in this application is described below, and the battery coolant control method described below can be referred to in correspondence with the battery coolant control method described above.

[0100] The battery coolant control system provided in this application embodiment specifically includes:

[0101] The system includes a control unit, a circulating water pump, and an expansion tank. The circulating water pump controls the flow of coolant in the battery liquid cooling system. The expansion tank adds coolant to the battery liquid cooling system. The control unit sends a self-circulation command to the circulating water pump to control its operation when it receives a target operation command and the vehicle's current operating state meets a first trigger condition. The target operation command includes any one of the following: a filling command or a draining command. The control unit is also used to determine whether a target operation corresponding to the target operation command has been completed based on a judgment condition corresponding to the target operation command. Furthermore, the control unit sends a stop command to the circulating water pump to stop its operation when the target operation is completed. The target operation includes any one of the following: a filling operation or a draining operation. When the target operation includes the filling operation, the system determines whether the filling is completed based on the change in the liquid level in the expansion tank. When the target operation includes the draining operation, the system determines whether the draining is completed based on an idling signal sent by the circulating water pump.

[0102] Optionally, the control unit is specifically configured to send the self-circulation command to the circulating water pump and control the operation of the circulating water pump when it receives the refueling command, the current operating state of the vehicle meets the first triggering condition, and the liquid level of the expansion tank is greater than the preset liquid level.

[0103] Optionally, the battery coolant control system further includes: a drain valve; the drain valve is located at the outlet of the circulating water pump; the coolant in the battery liquid cooling system is discharged through the drain valve; the control unit is specifically used to send the self-circulation command to the circulating water pump and control the operation of the circulating water pump when receiving the drain command, the current operating state of the vehicle meets the first triggering condition, and the drain valve is in the open state.

[0104] Optionally, the control unit is specifically configured to determine that the filling operation is completed if the liquid level change in the expansion tank meets a second triggering condition when the target operation includes the filling operation; wherein the second triggering condition includes: the liquid level fluctuation value of the expansion tank is less than a preset fluctuation threshold and lasts for a preset duration.

[0105] Optionally, the control unit is specifically configured to determine that the drainage operation is completed if it receives an idling signal sent by the circulating water pump when the target operation includes the drainage operation.

[0106] Optionally, the control unit includes: a vehicle controller (VCU), a battery management system (BMS), and a thermal management system (TMS); the VCU is configured to send first control information to the BMS when it receives the target operation command and the current operating state of the vehicle meets the first triggering condition; the BMS is configured to stop the thermal management control of the battery cooling system and send second control information to the TMS when it receives the first control information; the TMS is configured to send the self-circulation command to the circulating water pump when it receives the second control information; wherein, the first triggering condition includes at least one of the following: the vehicle is in an energized position, the vehicle is in a braking state, and the vehicle is in a parked state.

[0107] Optionally, the vehicle control unit (VCU) is further configured to send a first termination command to the battery management system (BMS) upon meeting a third triggering condition; the BMS is further configured to, upon receiving the first termination command, resume thermal management control of the battery cooling system and send a second termination command to the thermal management system (TMS); the TMS is further configured to, upon receiving the second termination command, send a stop command to the circulating water pump to control the circulating water pump to stop operating; wherein, the third triggering condition includes at least one of the following: the vehicle is in a de-energized state, the vehicle is not in a braking state, the vehicle speed is greater than zero, and the target operation is completed.

[0108] Optionally, the battery coolant control system further includes: an operation unit and a reminder unit; the operation unit is used to send a target control command corresponding to the target input to the vehicle controller (VCU) in response to the target input on the control panel; the reminder unit is used to display operation information corresponding to the target operation on the control panel based on the reminder information sent by the vehicle controller (VCU) during the execution of the target operation; wherein, the operation information includes any one of the following: status information of the filling operation, status information of the draining operation.

[0109] Figure 4 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 5 As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430, and a communication bus 440, wherein the processor 410, the communication interface 420, and the memory 430 communicate with each other through the communication bus 440. The processor 410 can call logic instructions in the memory 430 to execute a battery coolant control method. This method includes: when the control unit receives a target operation instruction and the current operating state of the vehicle meets a first trigger condition, it sends a self-circulation instruction to the circulating water pump to control the operation of the circulating water pump; the control unit determines whether a target operation corresponding to the target operation instruction has been completed based on a judgment condition corresponding to the target operation instruction; if the target operation is completed, the control unit sends a stop instruction to the circulating water pump to control the circulating water pump to stop operating; wherein the target operation includes any one of the following: a filling operation or a draining operation; if the target operation includes the filling operation, it determines whether the filling is completed based on the change in the liquid level of the expansion tank; if the target operation includes the draining operation, it determines whether the draining is completed based on an idling signal sent by the circulating water pump.

[0110] Furthermore, the logical instructions in the aforementioned memory 430 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0111] On the other hand, this application also provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions, and when the program instructions are executed by a computer, the computer can execute the battery coolant control method provided by the above methods. The method includes: when the control unit receives a target operation instruction and the current operating state of the vehicle meets a first triggering condition, it sends a self-circulation instruction to the circulating water pump to control the circulating water pump to operate; the control unit determines whether the target operation corresponding to the target operation instruction has been completed based on a judgment condition corresponding to the target operation instruction; when the target operation is completed, the control unit sends a stop instruction to the circulating water pump to control the circulating water pump to stop operating; wherein, the target operation includes any one of the following: a filling operation, a draining operation; when the target operation includes the filling operation, it determines whether the filling is completed based on the liquid level change in the expansion tank; when the target operation includes the draining operation, it determines whether the draining is completed based on the idling signal sent by the circulating water pump.

[0112] In another aspect, this application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the battery coolant control methods provided above. The method includes: when the control unit receives a target operation instruction and the current operating state of the vehicle meets a first triggering condition, sending a self-circulation instruction to the circulating water pump to control the operation of the circulating water pump; the control unit determines, based on a judgment condition corresponding to the target operation instruction, whether a target operation corresponding to the target operation instruction has been completed; when the target operation is completed, the control unit sends a stop instruction to the circulating water pump to control the circulating water pump to stop operating; wherein the target operation includes any one of the following: a filling operation, a draining operation; when the target operation includes the filling operation, determining whether filling is completed based on the change in the liquid level of the expansion tank; when the target operation includes the draining operation, determining whether draining is completed based on an idling signal sent by the circulating water pump.

[0113] Furthermore, this application also provides a vehicle that includes the aforementioned battery coolant control system.

[0114] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0115] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A battery coolant control system, characterized in that, The battery coolant control system includes: a control unit, a circulating water pump, and an expansion tank; the circulating water pump is used to control the flow of coolant in the battery cooling system; the expansion tank is used to add coolant to the battery cooling system; the control unit includes: a vehicle control unit (VCU), a battery management system (BMS), and a thermal management system (TMS). The control unit is configured to send a self-circulation command to the circulating water pump and control the operation of the circulating water pump when it receives a target operation command and the current operating state of the vehicle meets the first triggering condition; the target operation command includes any one of the following: a filling command, a draining command; wherein, the first triggering condition includes at least one of the following: the vehicle is in the energized position, the vehicle is in the braking state, or the vehicle is in the parked state. The control unit is further configured to determine whether the target operation corresponding to the target operation instruction has been completed based on the judgment condition corresponding to the target operation instruction; The control unit is also configured to send a stop command to the circulating water pump and control the circulating water pump to stop running when the target operation is completed; The target operation includes any one of the following: filling operation, draining operation; when the target operation includes the filling operation, the filling is determined to be completed based on the liquid level change in the expansion tank; when the target operation includes the draining operation, the draining is determined to be completed based on the idling signal sent by the circulating water pump. The battery coolant control system further includes: a drain valve; the drain valve is located at the outlet of the circulating water pump; the coolant in the battery liquid cooling system is discharged through the drain valve; The control unit is specifically used to send the self-circulation command to the circulating water pump and control the operation of the circulating water pump when it receives the drain command, the current operating state of the vehicle meets the first triggering condition, and the drain valve is in the open state.

2. The battery coolant control system according to claim 1, characterized in that, The control unit is specifically used to send the self-circulation command to the circulating water pump and control the operation of the circulating water pump when it receives the refueling command, the current operating state of the vehicle meets the first triggering condition, and the liquid level of the expansion tank is greater than the preset liquid level.

3. The battery coolant control system according to claim 1, characterized in that, The control unit is specifically configured to determine that the filling operation is completed if the change in the liquid level of the expansion tank meets the second triggering condition when the target operation includes the filling operation. The second triggering condition includes: the liquid level fluctuation value of the expansion tank is less than a preset fluctuation threshold and lasts for a preset duration.

4. The battery coolant control system according to claim 1, characterized in that, The control unit is specifically configured to determine that the drainage operation is completed if it receives an idling signal from the circulating water pump when the target operation includes the drainage operation.

5. The battery coolant control system according to any one of claims 1 to 4, characterized in that, The vehicle controller (VCU) is used to send first control information to the battery management system (BMS) when it receives the target operation command and the current operating state of the vehicle meets the first triggering condition. The battery management system (BMS) is used to stop the thermal management control of the battery cooling system upon receiving the first control information, and to send the second control information to the thermal management system (TMS). The thermal management system (TMS) is used to send the self-circulation command to the circulating water pump upon receiving the second control information.

6. The battery coolant control system according to claim 5, characterized in that, The vehicle controller (VCU) is also used to send a first termination command to the battery management system (BMS) when a third triggering condition is met. The battery management system (BMS) is further configured to, upon receiving the first termination command, resume thermal management control of the battery cooling system and send a second termination command to the thermal management system (TMS). The thermal management system (TMS) is also used to send the stop command to the circulating water pump upon receiving the second termination command, thereby controlling the circulating water pump to stop operating. The third triggering condition includes at least one of the following: the vehicle is not powered on, the vehicle is not in a braking state, the vehicle speed is greater than zero, and the target operation is completed.

7. The battery coolant control system according to claim 5, characterized in that, The battery coolant control system further includes: an operation unit and an alert unit; The operation unit is used to send a target control command corresponding to the target input to the vehicle controller (VCU) in response to the target input on the control panel. The reminder unit is used to display operation information corresponding to the target operation on the control panel based on the reminder information sent by the vehicle controller (VCU) during the execution of the target operation. The operation information includes any one of the following: status information of the filling operation, and status information of the draining operation.

8. A method for controlling battery coolant, characterized in that, An application is made to a battery coolant control system, the battery coolant control system comprising: a control unit, a circulating water pump, an expansion tank, and a drain valve; the circulating water pump is used to control the flow of coolant in the battery cooling system; the expansion tank is used to add coolant to the battery cooling system; the control unit includes: a vehicle control unit (VCU), a battery management system (BMS), and a thermal management system (TMS); the drain valve is located at the outlet of the circulating water pump; the coolant in the battery cooling system is discharged through the drain valve; the method includes: When the control unit receives a target operation command and the current operating state of the vehicle meets the first triggering condition, it sends a self-circulation command to the circulating water pump to control the operation of the circulating water pump; the target operation command includes any one of the following: a filling command, a draining command; wherein, the first triggering condition includes at least one of the following: the vehicle is in the energized position, the vehicle is in the braking state, or the vehicle is in the parked state. Wherein, when the control unit receives the drain command, the current operating state of the vehicle meets the first triggering condition, and the drain valve is in the open state, it sends the self-circulation command to the circulating water pump to control the operation of the circulating water pump; The control unit determines whether the target operation corresponding to the target operation instruction has been completed based on the judgment conditions corresponding to the target operation instruction; When the target operation is completed, the control unit sends a stop command to the circulating water pump to control the circulating water pump to stop running; The target operation includes any one of the following: filling operation, draining operation; when the target operation includes the filling operation, the filling is determined to be complete based on the liquid level change in the expansion tank; when the target operation includes the draining operation, the draining is determined to be complete based on the idling signal sent by the circulating water pump.

9. A vehicle, characterized in that, Includes the battery coolant control system as described in any one of claims 1 to 7.

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