Emergency energy management methods, devices, equipment and storage media for new energy vehicles

Abstract

This invention discloses a method, device, equipment, and storage medium for emergency energy management of new energy vehicles. The method includes: when receiving a level 3 undervoltage fault from the battery system, sending an emergency energy management command to the battery system, so that the battery system can assess the cell status according to the emergency energy management command; when the cell status meets the emergency energy management requirements, controlling the battery system to adjust the level 3 undervoltage threshold according to the real-time cell status, so that the battery system can estimate the current SOC based on the adjusted level 3 undervoltage threshold; receiving the current SOC from the battery system and estimating the remaining range based on the current SOC; and selecting a target emergency handling method based on the remaining range. This invention adjusts the level 3 undervoltage threshold based on the cell's cycle life while ensuring cell safety, and re-estimates the current SOC and remaining range. Compared with existing technologies, this invention can not only effectively reduce user vehicle operating costs but also improve the user's vehicle experience.

Description

Technical Field

[0001] This invention relates to the field of automotive emergency response technology, and in particular to a method, device, equipment, and storage medium for emergency energy management of new energy vehicles. Background Technology

[0002] With the rapid development of new energy in recent years, the usage of new energy vehicles in my country has increased significantly. However, various after-sales issues have also emerged in the market. Currently, the power battery systems of new energy vehicles mainly consist of lithium-ion batteries connected in series to form a high-voltage power battery. Lithium batteries suffer lifespan reduction after undervoltage. Therefore, mainstream technologies in the market have very stringent undervoltage protection for lithium batteries. Once a user triggers a level 3 undervoltage fault during vehicle use, the battery's usable charge becomes 0 and its state of charge (SOC) equals 0. At this time, the power battery management system will forcibly disconnect the high voltage, the power battery will stop outputting high voltage, the vehicle will immediately stop moving, and it will be impossible to recharge. If the user is driving at this time, the sudden and unexpected power interruption poses a certain safety risk. Afterwards, the user can only transport the vehicle to the corresponding brand's repair shop for battery repair before it can be used again. Currently, the repair cost of power batteries is relatively high, and the above-mentioned impacts significantly reduce the user's driving experience and increase additional operating costs.

[0003] Therefore, there is an urgent need for an emergency energy management method for new energy vehicles that can reduce user costs and improve user experience. Summary of the Invention

[0004] The main objective of this invention is to provide a method, device, equipment, and storage medium for emergency energy management of new energy vehicles, aiming to solve the technical problems in the prior art where undervoltage of the battery leads to vehicle breakdown on the road, resulting in increased vehicle operating costs and a poor user experience.

[0005] To achieve the above objectives, the present invention provides a method for emergency energy management of new energy vehicles, the method comprising the following steps:

[0006] When a Level 3 undervoltage fault is received from the battery system, an emergency energy management command is sent to the battery system so that the battery system can assess the cell status according to the emergency energy management command.

[0007] When the cell status meets the emergency energy management requirements, the battery system is controlled to adjust the three-level undervoltage threshold according to the real-time status of the cell, so that the battery system can estimate the current SOC based on the adjusted three-level undervoltage threshold;

[0008] Receive the current SOC sent by the battery system, and estimate the remaining range based on the current SOC;

[0009] The target emergency response method is selected based on the remaining mileage, and the target emergency response method includes pulling over or continuing to drive.

[0010] Optionally, the step of selecting a target emergency response method based on the remaining mileage includes:

[0011] The remaining mileage is compared with a preset mileage threshold to obtain the comparison result;

[0012] If the comparison result indicates that the remaining mileage is greater than the preset mileage threshold, then the vehicle speed is controlled to be less than or equal to the first speed threshold to continue driving;

[0013] If the comparison result indicates that the remaining mileage is less than or equal to the preset mileage threshold, then control the vehicle speed to be less than or equal to the second speed threshold and pull over to the side of the road.

[0014] Optionally, the step of sending an emergency energy management command to the battery system when a level 3 undervoltage fault is received from the battery system, so that the battery system can assess the cell status according to the emergency energy management command, includes:

[0015] When a Level 3 undervoltage fault is received from the battery system, a prompt message is sent to the vehicle driver asking whether to enter emergency energy management mode.

[0016] Upon receiving a confirmation command based on the aforementioned prompt information, the system enters emergency energy management mode.

[0017] An emergency energy management command is sent to the battery system so that the battery system can assess the cell status according to the emergency energy management command.

[0018] Optionally, the step of sending an emergency energy management command to the battery system, so that the battery system can assess the cell status according to the emergency energy management command, includes:

[0019] Send emergency energy management commands to the battery system;

[0020] After receiving the emergency energy management command, the battery system assesses the cell status based on the cell's health, the cell's real-time minimum temperature, the cell's voltage, and the cell's real-time SOC.

[0021] Optionally, the step of evaluating the cell status based on the cell's health, the cell's real-time minimum temperature per cell, the cell's voltage per cell, and the cell's real-time SOC includes:

[0022] The health status of the battery cell is compared with a first evaluation threshold to obtain a first comparison result;

[0023] The real-time lowest temperature of a single cell in the battery cell is compared with a second evaluation threshold to obtain a second comparison result;

[0024] The individual cell voltage of the battery cell is compared with the third evaluation threshold to obtain a third comparison result;

[0025] The real-time SOC of the battery cell is compared with the fourth evaluation threshold to obtain the fourth evaluation result;

[0026] The battery cell status is determined based on the first comparison result, the second comparison result, the third comparison result, and the fourth comparison result to determine whether the battery cell status meets the emergency energy management requirements.

[0027] Optionally, the step of controlling the battery system to adjust the three-level undervoltage threshold according to the real-time status of the battery cell when the cell state meets the emergency energy management requirements, so that the battery system can estimate the current SOC based on the adjusted three-level undervoltage threshold, includes:

[0028] When the cell condition meets the emergency energy management requirements, a three-level undervoltage threshold adjustment command is sent to the battery system;

[0029] After the battery system receives the three-level undervoltage threshold adjustment command, the battery system adjusts the three-level undervoltage threshold according to the real-time status of the cells to obtain the adjusted three-level undervoltage threshold, which is less than the original three-level undervoltage threshold.

[0030] The battery system estimates the current SOC based on the adjusted three-level undervoltage threshold.

[0031] Optionally, after the step of sending an emergency energy management command to the battery system when a level 3 undervoltage fault is received from the battery system, so that the battery system can assess the cell status according to the emergency energy management command, the method further includes:

[0032] If the battery cell condition does not meet the emergency energy management requirements, the emergency energy management mode will be exited based on the evaluation results.

[0033] Furthermore, to achieve the above objectives, the present invention also proposes an emergency energy management device for new energy vehicles, the device comprising:

[0034] The status assessment module is used to send an emergency energy management command to the battery system when it receives a Level 3 undervoltage fault from the battery system, so that the battery system can assess the cell status according to the emergency energy management command.

[0035] The emergency processing module is used to control the battery system to adjust the three-level undervoltage threshold according to the real-time status of the battery cell when the cell status meets the emergency energy management requirements, so that the battery system can estimate the current SOC based on the adjusted three-level undervoltage threshold.

[0036] The range estimation module is used to receive the current SOC sent by the battery system and estimate the remaining range based on the current SOC;

[0037] The fault resolution module is used to select a target emergency handling method based on the remaining mileage. The target emergency handling method includes pulling over or continuing to drive.

[0038] Furthermore, to achieve the above objectives, the present invention also proposes a new energy vehicle emergency energy management device, the device comprising: a memory, a processor, and a new energy vehicle emergency energy management program stored in the memory and executable on the processor, the new energy vehicle emergency energy management program being configured to implement the steps of the new energy vehicle emergency energy management method described above.

[0039] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing a new energy vehicle emergency energy management program, wherein when the new energy vehicle emergency energy management program is executed by a processor, it implements the steps of the new energy vehicle emergency energy management method described above.

[0040] This invention discloses a method for sending an emergency energy management command to a battery system upon receiving a Level 3 undervoltage fault, enabling the battery system to assess the cell status based on the command. When the cell status meets the emergency energy management requirements, the battery system adjusts the Level 3 undervoltage threshold based on the real-time cell status, allowing it to estimate the current State of Charge (SOC) based on the adjusted threshold. The invention also receives the current SOC from the battery system and estimates the remaining range based on it. Finally, a target emergency handling method is selected based on the remaining range, including either pulling over or continuing to drive. Because this invention assesses the cell status upon receiving a Level 3 undervoltage fault, adjusts the Level 3 undervoltage threshold based on the real-time cell status when the cell status meets the emergency energy management requirements, estimates the current SOC based on the adjusted threshold, and then estimates the remaining range and selects a target emergency handling method based on the current SOC, compared to existing technologies, this invention not only effectively reduces user vehicle operating costs but also improves the user's driving experience. Attached Figure Description

[0041] Figure 1 This is a flowchart illustrating the first embodiment of the emergency energy management method for new energy vehicles of the present invention.

[0042] Figure 2 This is a flowchart illustrating the second embodiment of the emergency energy management method for new energy vehicles of the present invention;

[0043] Figure 3 This is a flowchart illustrating the third embodiment of the emergency energy management method for new energy vehicles of the present invention.

[0044] Figure 4 This is a structural block diagram of the first embodiment of the emergency energy management device for new energy vehicles of the present invention;

[0045] Figure 5 This is a schematic diagram of the structure of the emergency energy management device for new energy vehicles in the hardware operating environment involved in the embodiments of the present invention.

[0046] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0048] This invention provides a method for emergency energy management of new energy vehicles, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the emergency energy management method for new energy vehicles according to the present invention.

[0049] In this embodiment, the emergency energy management method for new energy vehicles includes the following steps:

[0050] Step S10: When a Level 3 undervoltage fault is received from the battery system, an emergency energy management command is sent to the battery system so that the battery system can assess the cell status according to the emergency energy management command.

[0051] It should be noted that the executing entity in this embodiment can be a computer server device with data processing, network communication, and program execution functions applied in new energy vehicles, such as the vehicle controller (VCU) of a new energy vehicle, or an electronic device capable of realizing the above functions, such as a new energy vehicle emergency energy management device. The following uses a new energy vehicle emergency energy management device including a vehicle controller as an example to illustrate this embodiment and the following embodiments.

[0052] It should be understood that a Level 3 undervoltage fault typically refers to a voltage drop below the system's set minimum safety threshold in the battery management system (BMS) or related electrical system, and this fault is classified as one of the more serious levels. In existing technology, once a user triggers a Level 3 undervoltage fault while driving, the battery's available charge becomes 0 and its state of charge (SOC) equals 0. At this point, the battery system will forcibly disconnect the high voltage, the power battery will stop outputting high-voltage power, the vehicle will immediately stop moving, and it will be impossible to recharge it using a charging gun.

[0053] It should be noted that step S10 includes steps S101 to S103:

[0054] Step S101: When a Level 3 undervoltage fault is received from the battery system, a prompt message is sent to the vehicle driver asking whether to enter the emergency energy management mode.

[0055] Step S102: After receiving the confirmation entry command corresponding to the prompt information, enter the emergency energy management mode.

[0056] Step S103: Send an emergency energy management command to the battery system so that the battery system can assess the cell status according to the emergency energy management command.

[0057] In order to actively set the undervoltage threshold of the power battery based on the cycle life of the battery cell while ensuring the safety of the battery cell, step S103 includes:

[0058] Step S1031: Send an emergency energy management command to the battery system.

[0059] Step S1032: After the battery system receives the emergency energy management command, it evaluates the cell status based on the cell health, the cell's real-time minimum temperature, the cell's voltage, and the cell's real-time SOC.

[0060] In practice, when the vehicle is driving normally, the remaining charge SOC0 of the battery system and the voltage of the individual cells Ucell0 are both normal. During the vehicle's operation, when the battery system BMS detects that the cell voltage Ucell0 is less than the cell's level 3 undervoltage Uunder0, the battery system triggers a level 3 undervoltage fault Battery_Uunder3=1 and reports it to the vehicle controller VCU. After receiving the fault, the VCU enters the emergency energy management setting Emergency_Energy_Press and sends a prompt to the driver asking if they need to enter the emergency energy management mode. After the driver confirms entry based on the vehicle's display, the VCU receives the confirmation command Emergency_Energy_Press=1 and actively enters the emergency energy management mode, sending the emergency energy management command Emergency_Energy_Management=1 to the battery system BMS.

[0061] It needs to be explained that the VCU sends emergency energy management instructions to the battery system; after the battery system receives the emergency energy management instructions, it can assess the cell status based on the cell's health, the cell's real-time minimum temperature, the cell's voltage, and the cell's real-time SOC.

[0062] In practice, after receiving the emergency energy management command from the VCU, the BMS assesses the cell status of the battery system. It can confirm whether the cell meets the emergency energy management requirements based on four status parameters: cell health status (SOH), cell real-time minimum single-cell temperature (Tmin), cell single-cell voltage (Ucell), and cell real-time state of charge (SOC).

[0063] Step S20: When the cell status meets the emergency energy management requirements, control the battery system to adjust the three-level undervoltage threshold according to the real-time status of the cell, so that the battery system can estimate the current SOC based on the adjusted three-level undervoltage threshold.

[0064] In a specific implementation, when the cell status meets the emergency energy management requirements, a three-level undervoltage threshold adjustment command is sent to the battery system; after receiving the three-level undervoltage threshold adjustment command, the battery system adjusts the three-level undervoltage threshold according to the real-time status of the cell to obtain the adjusted three-level undervoltage threshold, which is lower than the original three-level undervoltage threshold; the battery system estimates the current SOC based on the adjusted three-level undervoltage threshold.

[0065] It should be noted that if the cell state meets the emergency energy management requirements, the BMS resets the three - level undervoltage threshold Uunder1 (Uunder1 < Uunder0) of the battery system according to the real - time state of the battery, and then the BMS re - estimates the value of SOCunder (SOCunder > SOC0) based on the Uunder1 voltage and sends it to the VCU. The VCU estimates the remaining mileage Remain_Mileage according to the updated real - time SOCunder value.

[0066] It should be understood that when the cell state does not meet the emergency energy management requirements, the emergency energy management mode is exited according to the evaluation result.

[0067] Step S30: Receive the current SOC sent by the battery system and estimate the remaining mileage based on the current SOC.

[0068] Step S40: Select a target emergency handling method according to the remaining mileage, and the target emergency handling method includes pulling over or continuing to drive.

[0069] It should be noted that the distance to the nearest charging pile can be confirmed. If the remaining mileage is greater than the distance to the nearest charging pile, continue to drive to the nearest charging pile for charging; if the remaining mileage is less than the distance to the nearest charging pile, pull over.

[0070] It can be understood that when the user finishes driving or pulls over, the vehicle exits the emergency energy management mode and returns to the normal state.

[0071] This embodiment discloses that when receiving a three - level undervoltage fault sent by the battery system, an emergency energy management instruction is sent to the battery system so that the battery system evaluates the cell state according to the emergency energy management instruction; when the cell state meets the emergency energy management requirements, the battery system is controlled to adjust the three - level undervoltage threshold according to the real - time cell state, so that the battery system estimates the current SOC according to the adjusted three - level undervoltage threshold; receive the current SOC sent by the battery system and estimate the remaining mileage based on the current SOC; select a target emergency handling method according to the remaining mileage, and the target emergency handling method includes pulling over or continuing to drive. Since in this embodiment, when receiving a three - level undervoltage fault sent by the battery system, the battery system evaluates the cell state according to the emergency energy management instruction, and then when the cell state meets the emergency energy management requirements, the battery system is controlled to adjust the three - level undervoltage threshold according to the real - time cell state, estimate the current SOC according to the adjusted three - level undervoltage threshold, then estimate the remaining mileage based on the current SOC and select a target emergency handling method. Compared with the prior art, this embodiment can not only effectively reduce the user's vehicle - using cost, but also improve the user's vehicle - using experience.

[0072] Reference Figure 2 , Figure 2 This is a flowchart illustrating the second embodiment of the emergency energy management method for new energy vehicles of the present invention.

[0073] Based on the first embodiment described above, in this embodiment, step S40 includes:

[0074] Step S401: Compare the remaining mileage with a preset mileage threshold to obtain a comparison result.

[0075] Step S402: If the comparison result indicates that the remaining mileage is greater than the preset mileage threshold, then control the vehicle speed to be less than or equal to the first speed threshold to continue driving.

[0076] Step S402': If the comparison result indicates that the remaining mileage is less than or equal to the preset mileage threshold, then control the vehicle speed to be less than or equal to the second speed threshold and pull over to the side of the road.

[0077] It should be noted that the aforementioned preset mileage threshold can be set based on the distance to the nearest charging station or it can be set custom-defined. This embodiment does not impose any restrictions on this.

[0078] The first and second speed thresholds mentioned above can also be customized according to actual conditions, and this embodiment does not impose any restrictions on them.

[0079] For example, if the remaining range Remain_Mileage > 3km, the vehicle speed will be limited to ≤30km / h until the end of the journey (allowing users to drive to the nearest charging station); if the remaining range L ≤ 3km, the vehicle speed will be limited to ≤5km / h (allowing users to idle and pull over). Once the user has finished driving or pulled over, the vehicle will exit the emergency energy management mode and return to normal operation.

[0080] This embodiment discloses that when a Level 3 undervoltage fault is received from the battery system, an emergency energy management command is sent to the battery system, so that the battery system evaluates the cell status according to the emergency energy management command; when the cell status meets the emergency energy management requirements, the battery system is controlled to adjust the Level 3 undervoltage threshold according to the real-time cell status, so that the battery system estimates the current State of Charge (SOC) based on the adjusted Level 3 undervoltage threshold; the current SOC sent by the battery system is received, and the remaining range is estimated based on the current SOC; the remaining range is compared with a preset range threshold to obtain a comparison result; if the comparison result indicates that the remaining range is greater than the preset range threshold, the vehicle speed is controlled to be less than or equal to a first speed threshold to continue driving; if the comparison result indicates that the remaining range is less than or equal to the preset range threshold, the vehicle speed is controlled to be less than or equal to a second speed threshold to pull over and stop. This embodiment compares the remaining mileage with a preset mileage threshold to obtain a comparison result. If the comparison result indicates that the remaining mileage is greater than the preset mileage threshold, the vehicle speed is controlled to be less than or equal to a first speed threshold to continue driving. If the comparison result indicates that the remaining mileage is less than or equal to the preset mileage threshold, the vehicle speed is controlled to be less than or equal to a second speed threshold to pull over and stop. Compared with the prior art, this effectively avoids the safety hazards to the driver caused by the vehicle breaking down on the road due to low battery voltage.

[0081] refer to Figure 3 , Figure 3 This is a flowchart illustrating the third embodiment of the emergency energy management method for new energy vehicles of the present invention.

[0082] Based on the above embodiments, in this embodiment, step S1032 includes:

[0083] Step S121: Compare the health of the battery cell with the first evaluation threshold to obtain the first comparison result.

[0084] Step S122: Compare the real-time lowest temperature of the battery cell with the second evaluation threshold to obtain a second comparison result.

[0085] Step S123: Compare the single cell voltage of the battery cell with the third evaluation threshold to obtain the third comparison result.

[0086] Step S124: Compare the real-time SOC of the battery cell with the fourth evaluation threshold to obtain the fourth evaluation result.

[0087] Step S125: Determine whether the cell status meets the emergency energy management requirements based on the first comparison result, the second comparison result, the third comparison result, and the fourth comparison result.

[0088] It should be understood that the first evaluation threshold, the second evaluation threshold, the third evaluation threshold, and the fourth evaluation threshold mentioned above can be adapted and adjusted according to the characteristics of different battery cells.

[0089] For example, taking a lithium iron phosphate battery as an example, if the cell health status SOH≥75%, the cell's real-time minimum single-cell temperature Tmin≥15℃, the cell's single-cell voltage≥2.0V, and the cell's real-time SOC>0%, then Battery_Status=1 is sent to the VCU, indicating that the cell status meets the emergency energy management requirements.

[0090] In the specific implementation, if any of the above conditions of the battery system status do not meet the emergency energy management requirements, Battery_Status=0 is sent to the VCU, and the VCU and BMS actively exit the emergency energy management mode.

[0091] This embodiment discloses a method for comparing the cell's health status with a first evaluation threshold to obtain a first comparison result; comparing the cell's real-time minimum temperature per cell with a second evaluation threshold to obtain a second comparison result; comparing the cell's voltage per cell with a third evaluation threshold to obtain a third comparison result; and comparing the cell's real-time state of charge (SOC) with a fourth evaluation threshold to obtain a fourth evaluation result. Based on the first, second, third, and fourth comparison results, it is determined whether the cell's condition meets emergency energy management requirements. Compared to existing technologies, this embodiment evaluates the cell's condition based on its health status, real-time minimum temperature per cell, cell voltage per cell, and real-time SOC, ensuring that the three-level undervoltage threshold can be adjusted subsequently while ensuring cell safety.

[0092] Furthermore, this embodiment of the invention also proposes a storage medium storing a new energy vehicle emergency energy management program, which, when executed by a processor, implements the steps of the new energy vehicle emergency energy management method described above.

[0093] Reference Figure 4 , Figure 4 This is a structural block diagram of the first embodiment of the emergency energy management device for new energy vehicles of the present invention.

[0094] like Figure 4 As shown, the emergency energy management device for new energy vehicles proposed in this embodiment of the invention includes: a status assessment module 401, an emergency processing module 402, a mileage estimation module 403, and a fault resolution module 404.

[0095] The status assessment module 401 is used to send an emergency energy management command to the battery system when it receives a level 3 undervoltage fault from the battery system, so that the battery system can assess the cell status according to the emergency energy management command.

[0096] The emergency processing module 402 is used to control the battery system to adjust the three-level undervoltage threshold according to the real-time status of the battery cell when the cell status meets the emergency energy management requirements, so that the battery system can estimate the current SOC based on the adjusted three-level undervoltage threshold.

[0097] The mileage estimation module 403 is used to receive the current SOC sent by the battery system and estimate the remaining mileage based on the current SOC.

[0098] The fault resolution module 404 is used to select a target emergency handling method based on the remaining mileage, and the target emergency handling method includes pulling over or continuing to drive.

[0099] This device embodiment discloses that when a Level 3 undervoltage fault is received from the battery system, an emergency energy management command is sent to the battery system, causing the battery system to assess the cell status according to the emergency energy management command. When the cell status meets the emergency energy management requirements, the battery system is controlled to adjust the Level 3 undervoltage threshold according to the real-time cell status, so that the battery system estimates the current State of Charge (SOC) based on the adjusted Level 3 undervoltage threshold. The current SOC is received from the battery system, and the remaining range is estimated based on the current SOC. A target emergency handling method is selected based on the remaining range, the target emergency handling method including pulling over or continuing to drive. Because this device embodiment assesses the cell status according to the emergency energy management command when a Level 3 undervoltage fault is received from the battery system, and then, when the cell status meets the emergency energy management requirements, controls the battery system to adjust the Level 3 undervoltage threshold according to the real-time cell status, estimates the current SOC based on the adjusted Level 3 undervoltage threshold, and then estimates the remaining range and selects a target emergency handling method based on the current SOC, compared to existing technologies, this device embodiment can not only effectively reduce user vehicle operating costs but also improve the user's vehicle operating experience.

[0100] Based on the first embodiment of the emergency energy management device for new energy vehicles described above, a second embodiment of the emergency energy management device for new energy vehicles of the present invention is proposed.

[0101] In this embodiment, the fault resolution module 404 is further configured to compare the remaining mileage with a preset mileage threshold to obtain a comparison result; if the comparison result indicates that the remaining mileage is greater than the preset mileage threshold, then the vehicle speed is controlled to be less than or equal to a first speed threshold to continue driving; if the comparison result indicates that the remaining mileage is less than or equal to the preset mileage threshold, then the vehicle speed is controlled to be less than or equal to a second speed threshold to pull over and stop.

[0102] Other embodiments or specific implementations of the emergency energy management device for new energy vehicles of the present invention can be referred to the above-described method embodiments, and will not be repeated here.

[0103] This application provides an emergency energy management device for new energy vehicles. The emergency energy management device for new energy vehicles includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the emergency energy management method for new energy vehicles in the above embodiment 1.

[0104] The following is for reference. Figure 5 The diagram illustrates a structural schematic suitable for implementing the emergency energy management device for new energy vehicles in the embodiments of this application. The emergency energy management device for new energy vehicles in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 5 The emergency energy management device for new energy vehicles shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0105] like Figure 5As shown, the emergency energy management device for new energy vehicles may include a processing unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the emergency energy management device for new energy vehicles. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tapes, hard disks, etc.; and communication devices 1009. Communication device 1009 allows the new energy vehicle emergency energy management device to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows a new energy vehicle emergency energy management device with various systems, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems can be implemented alternatively.

[0106] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0107] The emergency energy management device for new energy vehicles provided in this application, employing the emergency energy management method for new energy vehicles in the above embodiments, can solve the technical problems in the prior art where battery undervoltage leads to vehicle breakdowns on the road, resulting in increased vehicle operating costs and a poor user experience. Compared with the prior art, the beneficial effects of the emergency energy management device for new energy vehicles provided in this application are the same as those of the emergency energy management method for new energy vehicles provided in the above embodiments, and other technical features of this emergency energy management device are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0108] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0109] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0110] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0111] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0112] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, 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 is stored in a storage medium (such as read-only memory / random access memory, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0113] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A method for emergency energy management of new energy vehicles, characterized in that, The method includes: When a Level 3 undervoltage fault is received from the battery system, an emergency energy management command is sent to the battery system so that the battery system can assess the cell status according to the emergency energy management command. When the cell status meets the emergency energy management requirements, the battery system is controlled to adjust the three-level undervoltage threshold according to the real-time status of the cell, so that the battery system can estimate the current SOC based on the adjusted three-level undervoltage threshold; Receive the current SOC sent by the battery system, and estimate the remaining range based on the current SOC; Select a target emergency response method based on the remaining mileage; the target emergency response method includes either pulling over or continuing to drive. The step of sending an emergency energy management command to the battery system when a level 3 undervoltage fault is received from the battery system, so that the battery system can assess the cell status according to the emergency energy management command, includes: When a Level 3 undervoltage fault is received from the battery system, a prompt message is sent to the vehicle driver asking whether to enter emergency energy management mode. Upon receiving a confirmation command based on the aforementioned prompt information, the system enters emergency energy management mode. An emergency energy management command is sent to the battery system so that the battery system can assess the cell status according to the emergency energy management command.

2. The emergency energy management method for new energy vehicles as described in claim 1, characterized in that, The step of selecting a target emergency response method based on the remaining mileage includes: The remaining mileage is compared with a preset mileage threshold to obtain the comparison result; If the comparison result indicates that the remaining mileage is greater than the preset mileage threshold, then the vehicle speed is controlled to be less than or equal to the first speed threshold to continue driving; If the comparison result indicates that the remaining mileage is less than or equal to the preset mileage threshold, then control the vehicle speed to be less than or equal to the second speed threshold and pull over to the side of the road.

3. The emergency energy management method for new energy vehicles as described in claim 1, characterized in that, The step of sending an emergency energy management command to the battery system, so that the battery system can assess the cell status according to the emergency energy management command, includes: Send emergency energy management commands to the battery system; After receiving the emergency energy management command, the battery system assesses the cell status based on the cell's health, the cell's real-time minimum temperature, the cell's voltage, and the cell's real-time SOC.

4. The emergency energy management method for new energy vehicles as described in claim 3, characterized in that, The step of evaluating the cell status based on the cell's health, the cell's real-time minimum temperature, the cell's individual voltage, and the cell's real-time SOC includes: The health status of the battery cell is compared with a first evaluation threshold to obtain a first comparison result; The real-time lowest temperature of a single cell in the battery cell is compared with a second evaluation threshold to obtain a second comparison result; The individual cell voltage of the battery cell is compared with the third evaluation threshold to obtain a third comparison result; The real-time SOC of the battery cell is compared with the fourth evaluation threshold to obtain the fourth evaluation result; The battery cell status is determined based on the first comparison result, the second comparison result, the third comparison result, and the fourth comparison result to determine whether the battery cell status meets the emergency energy management requirements.

5. The emergency energy management method for new energy vehicles as described in claim 1, characterized in that, When the cell condition meets emergency energy management requirements, the step of controlling the battery system to adjust the three-level undervoltage threshold according to the real-time cell condition, so that the battery system can estimate the current SOC based on the adjusted three-level undervoltage threshold, includes: When the cell condition meets the emergency energy management requirements, a three-level undervoltage threshold adjustment command is sent to the battery system; After the battery system receives the three-level undervoltage threshold adjustment command, the battery system adjusts the three-level undervoltage threshold according to the real-time status of the cells to obtain the adjusted three-level undervoltage threshold, which is less than the original three-level undervoltage threshold. The battery system estimates the current SOC based on the adjusted three-level undervoltage threshold.

6. The emergency energy management method for new energy vehicles as described in claim 1, characterized in that, After the step of sending an emergency energy management command to the battery system when a level 3 undervoltage fault is received from the battery system, so that the battery system can assess the cell status according to the emergency energy management command, the method further includes: If the battery cell condition does not meet the emergency energy management requirements, the emergency energy management mode will be exited based on the evaluation results.

7. An emergency energy management device for new energy vehicles, characterized in that, The device comprises: The status assessment module is used to send an emergency energy management command to the battery system when it receives a Level 3 undervoltage fault from the battery system, so that the battery system can assess the cell status according to the emergency energy management command. The emergency processing module is used to control the battery system to adjust the three-level undervoltage threshold according to the real-time status of the battery cell when the cell status meets the emergency energy management requirements, so that the battery system can estimate the current SOC based on the adjusted three-level undervoltage threshold. The range estimation module is used to receive the current SOC sent by the battery system and estimate the remaining range based on the current SOC; The fault resolution module is used to select a target emergency handling method based on the remaining mileage, and the target emergency handling method includes pulling over or continuing to drive. The status assessment module is also used to send a prompt message to the driver of the vehicle asking whether to enter the emergency energy management mode when a level 3 undervoltage fault is received from the battery system; to enter the emergency energy management mode after receiving a confirmation entry command based on the prompt message; and to send an emergency energy management command to the battery system so that the battery system can assess the cell status according to the emergency energy management command.

8. An emergency energy management device for new energy vehicles, characterized in that, The device includes: a memory, a processor, and a new energy vehicle emergency energy management program stored in the memory and executable on the processor, wherein the new energy vehicle emergency energy management program is configured to implement the steps of the new energy vehicle emergency energy management method as described in any one of claims 1 to 6.

9. A storage medium, characterized in that, The storage medium stores a new energy vehicle emergency energy management program, which, when executed by a processor, implements the steps of the new energy vehicle emergency energy management method as described in any one of claims 1 to 6.

Images