Battery protection method, device, storage medium and vehicle

Abstract

This application discloses a battery protection method, device, storage medium, and vehicle. The method includes: obtaining an estimated remaining charge of the battery pack as estimated by a battery management system; obtaining the actual remaining charge of the battery pack; determining whether the battery pack has a risk of over-discharge based on the estimated and actual remaining charges; and if the risk of over-discharge is determined, controlling the hybrid vehicle to disable a preset function. This application uses the estimated and actual remaining charges of the battery pack to detect whether there is a risk of over-discharge, and when it is determined, controls the hybrid vehicle to disable a preset function. Therefore, this application implements the function of detecting the risk of over-discharge in the battery pack, and when the risk of over-discharge exists, it prevents the battery pack from over-discharge by disabling preset functions in the vehicle, thereby protecting the vehicle's battery.

Description

Technical Field

[0001] This application relates to the field of hybrid vehicle technology, and more particularly to a battery protection method, device, storage medium, and vehicle. Background Technology

[0002] Hybrid vehicles, typically referring to hybrid electric vehicles (HEVs), use a traditional internal combustion engine (diesel or gasoline engine) and an electric motor as power sources. Some engines are also modified to use alternative fuels, such as compressed natural gas, propane, and ethanol. Hybrid vehicles combine the advantages of both pure electric vehicles and traditional internal combustion engine vehicles. While meeting the requirements for vehicle power and driving range, they effectively improve fuel economy and reduce emissions, and are considered one of the effective paths to energy conservation and emission reduction.

[0003] Current hybrid vehicles integrate two power sources, the engine and the battery pack, into the same vehicle. Therefore, hybrid vehicles contain two power actuators, the engine and the electric motor, which can be configured in various power architectures, such as series, parallel, or series-parallel. Summary of the Invention

[0004] This application provides a battery protection method, device, computer storage medium, and vehicle, which realizes the function of detecting the risk of battery over-discharge in the battery pack, and prevents the battery pack from over-discharge by disabling preset functions in the vehicle when the risk of battery over-discharge exists. The technical solution is as follows:

[0005] In a first aspect, embodiments of this application provide a battery protection method applied to hybrid vehicles, the method comprising:

[0006] Obtain the estimated remaining battery capacity of the battery pack as estimated by the battery management system;

[0007] Obtain the actual remaining power of the battery pack;

[0008] Based on the estimated remaining power and the actual remaining power, it is determined whether the battery pack has a risk of over-discharge.

[0009] If it is determined that the battery pack poses a risk of over-discharge, then the hybrid vehicle is controlled to disable preset functions.

[0010] Secondly, embodiments of this application provide a battery protection device applied to a hybrid vehicle, the device comprising:

[0011] The first acquisition module is used to acquire the estimated remaining power of the battery pack as estimated by the battery management system.

[0012] The second acquisition module is used to acquire the actual remaining power of the battery pack.

[0013] The risk assessment module is used to determine whether the battery pack has a risk of over-discharge based on the estimated remaining power and the actual remaining power.

[0014] The risk operation module is used to control the hybrid vehicle to disable preset functions if it is determined that there is a risk of over-discharge of the battery pack.

[0015] Thirdly, embodiments of this application provide a computer storage medium having multiple instructions adapted for loading by a processor and executing the above-described method steps.

[0016] Fourthly, embodiments of this application provide a vehicle that may include: a memory and a processor; wherein the memory stores a computer program adapted to be loaded by the memory and to execute the above-described method steps.

[0017] The beneficial effects of the technical solutions provided in this application include at least the following:

[0018] In this embodiment, firstly, the estimated remaining battery capacity of the battery pack, as estimated by the battery management system, is obtained, and then the actual remaining battery capacity is obtained. Based on the estimated and actual remaining battery capacity, it is determined whether the battery pack has a risk of over-discharge. If the risk of over-discharge is determined, a preset function of the hybrid vehicle is disabled. This embodiment detects the risk of over-discharge by using the estimated and actual remaining battery capacity. If the risk is determined, the preset function of the hybrid vehicle is disabled. Therefore, this embodiment detects the risk of over-discharge in the battery pack and, in the event of such a risk, prevents over-discharge by disabling a preset function in the vehicle, thereby protecting the vehicle's battery. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic flowchart of a battery protection method provided in an embodiment of this application;

[0021] Figure 2 This is a schematic flowchart of another battery protection method provided in an embodiment of this application;

[0022] Figure 3 This is a schematic flowchart of another battery protection method provided in the embodiments of this application;

[0023] Figure 4 This is a schematic diagram of the structure of a battery protection device provided in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application. Detailed Implementation

[0025] To make the inventive objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments 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, and 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.

[0026] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this application, it should be noted that, unless otherwise expressly specified and limited, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0027] Currently, hybrid vehicles are favored by many users due to their comprehensive performance and outstanding features such as being compatible with both gasoline and electric powertrains, with an increasing number of users using them as a means of transportation. However, the operating conditions and powertrain architecture of hybrid vehicles are relatively complex, and because the batteries in hybrid vehicles have a narrow operating window, they are more prone to over-discharge. Therefore, how to minimize battery over-discharge in hybrid vehicles is a technical problem that urgently needs to be solved.

[0028] The present application will now be described in detail with reference to specific embodiments.

[0029] In the following method embodiments, for ease of explanation, only the vehicle is described as the subject performing each step.

[0030] Please see Figure 1 This is a schematic flowchart of a battery protection method provided in an embodiment of this application. Figure 1 As shown, the method described in this application embodiment may include the following steps:

[0031] S101, obtain the estimated remaining power of the battery pack as estimated by the battery management system.

[0032] In simple terms, a battery management system (BMS) is a system used to monitor the state of a battery (temperature, voltage, state of charge, etc.) and provides communication, safety, cell balancing, and management control for the battery. In hybrid vehicles, the hybrid battery is a battery pack composed of multiple cells. When a specific cell in the battery pack fails, the BMS's cell balancing function can control other cells to take over the operation of that faulty cell, thus not affecting the overall use of the battery pack.

[0033] A battery pack can refer to a battery pack composed of multiple batteries in a hybrid vehicle. A battery pack can also be a pack composed of multiple battery cells, which may include one or more batteries.

[0034] Estimated remaining battery power refers to the amount of usable battery capacity remaining in the battery pack. This estimated remaining battery power can be displayed on the vehicle's central control screen.

[0035] In this embodiment, the BMS can estimate the remaining usable capacity of the battery pack in real time. Therefore, the estimated remaining capacity of the battery pack can be obtained from the BMS. The estimated remaining capacity can be equal to the State of Charge (SOC) value. SOC represents the percentage of usable capacity that the battery can release under specified discharge conditions.

[0036] Specifically, the BMS estimates the remaining usable capacity of the battery pack in real time, which can be understood as the BMS estimating the State of Charge (SOC) value of the battery pack in real time. Let's take a battery pack composed of multiple cells as an example. First, the BMS can estimate the SOC value of each individual cell in the battery pack in real time. Then, the BMS calculates the average of these SOC values ​​and uses this average as the SOC value of the battery pack. Methods such as the ampere-hour integration method, open-circuit voltage method, and Kalman filtering algorithm can be used to estimate the SOC value of an individual cell in the battery pack.

[0037] Among them, the ampere-hour integration method refers to the method of estimating the state of charge (SOC) of a battery by accumulating the discharged electricity during the battery discharge process. The calculation process of the ampere-hour integration method is as follows: given the initial SOC value, the battery current is measured, and by integrating the current, the change in battery charge can be accurately calculated, thus obtaining the remaining charge, i.e., the SOC. The open-circuit voltage method refers to the method of calculating the SOC by measuring the battery's open-circuit voltage. The Kalman filter algorithm refers to first using an established accurate model to make a prior estimate of the SOC and a prediction of the terminal voltage, and then adjusting the gain based on the comparison between the actual measured value and the predicted value of the terminal voltage, continuously iterating and optimizing to achieve the optimal estimate of the SOC.

[0038] S102, obtain the actual remaining power of the battery pack.

[0039] It's easy to understand that the actual remaining capacity can refer to the minimum remaining capacity of the battery pack. Since a battery pack is composed of multiple batteries, the actual remaining capacity can refer to the remaining capacity of a single battery among those batteries, and that remaining capacity is the smallest among the remaining capacities of all the batteries.

[0040] In some embodiments, the actual remaining capacity can also be equal to the SOC value. Specifically, the first SOC value estimated by the BMS for each battery in the battery pack can be obtained, and the minimum value among the first SOC values ​​can be determined. This minimum value can be used as the actual remaining capacity of the battery pack.

[0041] S103, based on the estimated remaining power and the actual remaining power, determines whether there is a risk of battery over-discharge in the battery pack.

[0042] Battery over-discharge risk refers to the risk of a vehicle's battery being over-discharged. When the actual remaining battery capacity is low, and there is a significant discrepancy between the estimated and actual remaining capacity, the vehicle's battery pack is considered to be at risk of over-discharge.

[0043] In some embodiments, the presence of over-discharge risk in the battery pack can be determined by combining the deviation between the estimated remaining charge and the actual remaining charge, along with the actual remaining charge. In this embodiment, the estimated remaining charge can be the charge displayed on the vehicle's central control screen, which serves as a reminder to the user of the real-time remaining battery charge. Because the estimated and actual remaining charges are calculated differently, their values ​​may differ. The estimated remaining charge can be greater than or equal to the actual remaining charge.

[0044] Specifically, the vehicle can locally store a difference threshold and a battery level threshold. The difference between the remaining battery level and the actual remaining battery level can be calculated. When the difference is positive, it can be determined whether the difference is greater than or equal to the difference threshold; when the difference is negative, it can be determined whether the absolute value of the difference is greater than or equal to the difference threshold. If the difference or its absolute value is greater than the difference threshold, and the actual remaining battery level is less than or equal to the battery level threshold, it can be determined that the battery pack has a risk of over-discharge. Alternatively, if the difference or its absolute value is equal to the difference threshold, and the actual remaining battery level is less than or equal to the battery level threshold, it can be determined that the battery pack has a risk of over-discharge. Otherwise, the battery pack does not have a risk of over-discharge.

[0045] S104 If it is determined that there is a risk of battery over-discharge in the battery pack, the preset function of the hybrid vehicle is disabled.

[0046] It's easy to understand that preset functions can include, but are not limited to, intelligent voltage conversion, remote preheating, active heat preservation, air conditioning heating, and air conditioning cooling. These preset functions consume a significant amount of power. Intelligent voltage conversion can refer to intelligent charging, which means that when the battery pack's charge is low, the DC / DC converter (DC converter module) promptly replenishes the battery pack, ensuring it has sufficient power for operation. Remote preheating refers to remotely warming up the vehicle. In cold winter temperatures, it's necessary to warm up the car before driving, allowing the driver to start the car immediately once the engine reaches operating temperature. Active heat preservation can refer to actively waking up the vehicle and heating the battery in place when the battery pack temperature is detected below -20°C, ensuring good cold-start performance.

[0047] In some embodiments, if a risk of battery over-discharge is determined in the battery pack, certain preset functions can be disabled in the vehicle. This could involve disabling all or some preset functions. Therefore, disabling preset functions can prevent further battery consumption and avoid over-discharge of the vehicle's battery.

[0048] In this embodiment, firstly, the estimated remaining battery capacity of the battery pack, as estimated by the battery management system, is obtained, and then the actual remaining battery capacity is obtained. Based on the estimated and actual remaining battery capacity, it is determined whether the battery pack has a risk of over-discharge. If the risk of over-discharge is determined, a preset function of the hybrid vehicle is disabled. This embodiment detects the risk of over-discharge by using the estimated and actual remaining battery capacity. If the risk is determined, the preset function of the hybrid vehicle is disabled. Therefore, this embodiment detects the risk of over-discharge in the battery pack and, in the event of such a risk, prevents over-discharge by disabling a preset function in the vehicle, thereby protecting the vehicle's battery.

[0049] Please see Figure 2 This is a schematic flowchart of a battery protection method provided in an embodiment of this application. Figure 2 As shown, the method described in this application embodiment may include the following steps:

[0050] S201, Obtain the estimated remaining power of the battery pack as estimated by the battery management system.

[0051] Specifically, see Figure 1 The description of S101 will not be repeated here.

[0052] S202, Identify the target battery in the battery pack and calculate the actual remaining power of the battery pack based on the capacity of the target battery.

[0053] It is easy to understand that the target battery can refer to the single battery with the lowest voltage in the battery pack. Alternatively, the target battery can refer to the single battery cell with the lowest voltage in the battery pack. A battery cell can include one or more batteries.

[0054] In some embodiments, the single battery with the lowest voltage, i.e., the target battery, can be determined by measuring the voltage of each battery in the battery pack. Alternatively, the battery cell with the lowest voltage can be determined by measuring the voltage of each battery cell in the battery pack. Further, the capacity of the target battery can be calculated, i.e., the remaining usable capacity corresponding to the target battery can be calculated. The capacity of the target battery can be determined as the actual remaining capacity of the battery pack.

[0055] Since the target battery is the one with the lowest voltage, the actual remaining capacity is also the minimum usable capacity of the battery pack. The capacity of the target battery can be equal to its corresponding State of Charge (SOC) value; that is, the actual remaining capacity can be the SOC value of the target battery. Specifically, the SOC value of the target battery can also be calculated using methods such as the ampere-hour integration method, the open-circuit voltage method, and the Kalman filter algorithm.

[0056] S203, calculate the difference between the estimated remaining power and the actual remaining power.

[0057] In some embodiments, the difference between the estimated remaining power and the actual remaining power can be calculated.

[0058] S204. If the difference is greater than or equal to the first difference threshold, and the actual remaining power is less than or equal to the power threshold, then it is determined that the battery pack has a risk of over-discharge.

[0059] In some embodiments, the vehicle may locally store a first difference threshold and a battery level threshold. For example, the first difference threshold may be set to 5%, and the battery level threshold may be set to 12%. When the difference is positive, it can be determined whether the difference is greater than or equal to the first difference threshold; when the difference is negative, it can be determined whether the absolute value of the difference is greater than or equal to the first difference threshold. If the difference or its absolute value is greater than the first difference threshold, and the actual remaining battery level is less than or equal to the battery level threshold, it can be determined that the battery pack has a risk of over-discharge; or, if the difference or its absolute value is equal to the first difference threshold, and the actual remaining battery level is less than or equal to the battery level threshold, it can be determined that the battery pack has a risk of over-discharge. Otherwise, the battery pack does not have a risk of over-discharge.

[0060] In another embodiment, the vehicle can store not only a first difference threshold and a battery level threshold locally, but also a preset duration. For example, the preset duration can be set to 4 seconds. If the duration for which the difference is greater than or equal to the first difference threshold is longer than the preset duration, and the duration for which the actual remaining battery level is less than or equal to the battery level threshold is longer than the preset duration, then it can be determined that the battery pack has a risk of over-discharge. Specifically, when the difference is positive, it can be determined whether the duration for which the difference is greater than or equal to the first difference threshold is longer than the preset duration; when the difference is negative, it can be determined whether the duration for which the absolute value of the difference is greater than or equal to the first difference threshold is longer than the preset duration. If the duration for which the difference or absolute value of the difference is greater than the first difference threshold is greater than a preset duration, and the duration for which the actual remaining battery capacity is less than or equal to the battery capacity threshold is greater than the preset duration, then the battery pack can be determined to have a risk of over-discharge. Alternatively, if the duration for which the difference or absolute value of the difference is equal to the first difference threshold is greater than the preset duration, and the duration for which the actual remaining battery capacity is less than or equal to the battery capacity threshold is greater than the preset duration, then the battery pack can be determined to have a risk of over-discharge. Otherwise, the battery pack does not have a risk of over-discharge. By determining the duration of the difference and the duration for which the actual remaining battery capacity is less than the threshold, the accuracy of detecting over-discharge risk is further ensured.

[0061] S205, controls the disabling of preset functions in hybrid vehicles.

[0062] Specifically, see Figure 1 The description of S104 in the illustrated embodiment will not be repeated here.

[0063] S206, based on the estimated remaining power and the actual remaining power, determine whether the battery pack meets the risk clearance conditions.

[0064] In some embodiments, after disabling some or all preset functions of the vehicle, it can be determined whether the battery pack meets the risk clearance conditions based on the deviation between the estimated remaining battery capacity and the actual remaining battery capacity, as well as the actual remaining battery capacity. The difference between the estimated remaining battery capacity and the actual remaining battery capacity can be calculated. If the difference is less than a second difference threshold, and the actual remaining battery capacity is less than or equal to a battery capacity threshold, and the duration for which both the difference is less than the second difference threshold and the duration for which the actual remaining battery capacity is less than or equal to the battery capacity threshold are greater than or equal to a duration threshold, then it can be determined that the battery pack meets the risk clearance conditions.

[0065] Specifically, the vehicle can pre-store a second difference threshold and a duration threshold locally. For example, the first difference threshold can be set to 2%, and the duration threshold can be set to 5 seconds. When the difference is positive, it can be determined whether the duration for which the difference is less than the second difference threshold is greater than the duration threshold; when the difference is negative, it can be determined whether the duration for which the absolute value of the difference is less than the second difference threshold is greater than the duration threshold. If the duration for which the difference or the absolute value of the difference is less than the second difference threshold is greater than the duration threshold, and the duration for which the actual remaining battery power is less than or equal to the battery power threshold is greater than the preset duration, it can be determined that the battery pack meets the risk clearance conditions.

[0066] S207 If it is determined that the battery pack meets the risk clearance conditions, the hybrid vehicle is controlled to stop disabling the preset function.

[0067] In some embodiments, when it is determined that the battery pack meets the risk clearance conditions, the hybrid electric vehicle can be controlled to stop disabling the preset function, that is, the vehicle can be controlled to no longer disable the preset function.

[0068] In this embodiment, not only can the function of detecting whether there is a risk of battery over-discharge in the battery pack of a hybrid vehicle be realized, but also, in the event of a risk of battery over-discharge, the vehicle can be controlled to disable preset functions to prevent the battery from over-discharged, thereby protecting the vehicle's battery. When detecting the risk of battery over-discharge, in addition to considering the deviation between charge levels, the duration of the deviation is also taken into account, improving the accuracy of detecting the risk of battery over-discharge. This embodiment can also, after disabling the preset functions, continue to detect whether the vehicle's battery pack meets the risk clearance conditions. If the risk clearance conditions are met, the vehicle can be controlled to no longer disable the preset functions, ensuring that the vehicle's functions can be used normally.

[0069] Please see Figure 3 This is a schematic flowchart of a battery protection method provided in an embodiment of this application. Figure 3 As shown, the method described in this application embodiment may include the following steps:

[0070] S301, obtain the estimated remaining power of the battery pack as estimated by the battery management system.

[0071] S302, obtain the actual remaining power of the battery pack.

[0072] Specifically, see S301-S302. Figure 1 The descriptions of S101-S102 will not be repeated here.

[0073] S303, calculate the difference between the estimated remaining power and the actual remaining power.

[0074] S304. If the difference is greater than or equal to the first difference threshold, and the actual remaining power is less than or equal to the power threshold, then it is determined that the battery pack has a risk of over-discharge.

[0075] S305, controls the disabling of preset functions in hybrid vehicles.

[0076] Specifically, see S303-S305. Figure 2 The descriptions of S203-S205 will not be repeated here.

[0077] S306 controls the hybrid vehicle to send a prompt message to the terminal corresponding to the hybrid vehicle.

[0078] It is easy to understand that the prompt message is used to remind the user corresponding to the terminal to set the target battery level of the hybrid vehicle to the preset battery level.

[0079] The terminal, in this context, refers to a smart terminal that is linked to the hybrid vehicle, such as a mobile phone, tablet, or laptop. This terminal can have a mini-program or software installed for user interaction with the vehicle. Users can interact with the vehicle through these programs or software, such as adjusting vehicle settings. The vehicle can also send notifications to the user through these programs or software to inform them of its status.

[0080] The user-defined target battery charge level setting function is designed to control the vehicle to maintain the remaining available battery charge near the target level, ensuring vehicle usability. Hybrid vehicles can use a portion of the engine's power to generate electricity and store it in the battery, further increasing the battery's remaining available charge.

[0081] In some embodiments, after disabling the preset function of the hybrid vehicle, the hybrid vehicle can also be controlled to send a prompt instruction to the server corresponding to the hybrid vehicle. The prompt instruction can instruct the server to send a prompt message to the terminal corresponding to the hybrid vehicle. The prompt message is intended to remind the user of the terminal to set the target battery level of the hybrid vehicle to the preset battery level, thereby realizing the function of controlling the hybrid vehicle to send a prompt message to the terminal corresponding to the hybrid vehicle.

[0082] In another embodiment, while controlling the hybrid vehicle to disable preset functions, it can also control the hybrid vehicle to send a prompt instruction to the server corresponding to the hybrid vehicle. This prompt instruction can instruct the server to send a prompt message to the terminal corresponding to the hybrid vehicle. This prompt message is intended to remind the user of the terminal to set the target battery level of the hybrid vehicle to the preset battery level, thereby realizing the function of controlling the hybrid vehicle to send a prompt message to the terminal corresponding to the hybrid vehicle.

[0083] It's important to note that once the target battery level is set to a preset level, the vehicle can automatically activate a function to calibrate and estimate the remaining battery level using the actual remaining battery capacity. That is, when the vehicle detects that the difference between the actual remaining battery capacity and the estimated remaining battery capacity exceeds a threshold, it will calibrate the estimated remaining battery capacity displayed in the vehicle to the actual remaining battery capacity. This allows users to promptly understand the actual remaining usable battery capacity in the current state. Furthermore, if the user finds that the calibrated estimated remaining battery capacity is low, they can adjust their driving habits in time to prevent over-discharge of the battery, thus further protecting the vehicle's battery.

[0084] In this embodiment, not only can the system detect the risk of over-discharge in the battery pack of a hybrid vehicle, but it can also prevent over-discharge by disabling preset functions in the event of such a risk. Furthermore, it can send prompts to the terminal to remind the user to adjust the target battery level, thereby controlling the vehicle to calibrate the estimated remaining battery level displayed on the vehicle's central control screen. This allows the user to perform corresponding control operations based on the calibrated estimated remaining battery level, thus preventing over-discharge through user intervention.

[0085] Please see Figure 4 This is a schematic diagram of a battery protection device provided in an embodiment of this application. The battery protection device 400 can be implemented as all or part of an electric vehicle through software, hardware, or a combination of both. The battery protection device 400 includes:

[0086] The first acquisition module 410 is used to acquire the estimated remaining power of the battery pack as estimated by the battery management system.

[0087] The second acquisition module 420 is used to acquire the actual remaining power of the battery pack.

[0088] The risk assessment module 430 is used to determine whether the battery pack has a risk of over-discharge based on the estimated remaining power and the actual remaining power.

[0089] The risk operation module 440 is used to control the hybrid vehicle to disable preset functions if it is determined that there is a risk of over-discharge of the battery pack.

[0090] Optionally, the risk assessment module includes:

[0091] The first determination unit is used to calculate the difference between the estimated remaining power and the actual remaining power;

[0092] The second determination unit is used to determine that the battery pack has a risk of over-discharge if the difference is greater than or equal to the first difference threshold and the actual remaining power is less than or equal to the power threshold.

[0093] Optionally, the second determination unit includes:

[0094] The third determination unit is used to determine that the battery pack has a risk of over-discharge if the duration of the difference being greater than or equal to the first difference threshold is greater than a preset duration, and the duration of the actual remaining power being less than or equal to the power threshold is greater than the preset duration.

[0095] Optionally, the battery protection device also includes:

[0096] The second operation module is used to control the hybrid vehicle to send a prompt message to the terminal corresponding to the hybrid vehicle if it is determined that there is a risk of over-discharge of the battery pack. The prompt message is used to prompt the user corresponding to the terminal to set the target power reserve of the hybrid vehicle to a preset power level.

[0097] Optionally, the second acquisition module includes:

[0098] The first acquisition unit is used to determine the target battery in the battery pack;

[0099] The second acquisition unit is used to calculate the actual remaining power of the battery pack based on the capacity of the target battery.

[0100] Optionally, the battery protection device also includes:

[0101] The first risk removal module is used to determine whether the battery pack meets the risk removal conditions based on the estimated remaining power and the actual remaining power.

[0102] The second risk clearance module is used to control the hybrid vehicle to stop disabling the preset function if it is determined that the battery pack meets the risk clearance conditions.

[0103] Optionally, the first risk mitigation module includes:

[0104] Calculate the difference between the estimated remaining power and the actual remaining power;

[0105] If the difference is less than the second difference threshold, and the actual remaining power is less than or equal to the power threshold, and the duration for which the difference is less than the second difference threshold and the duration for which the actual remaining power is less than or equal to the power threshold are both greater than or equal to the duration threshold, then the battery pack is determined to meet the risk clearance condition.

[0106] Please refer to Figure 5 This illustration shows a structural schematic of a vehicle provided in an exemplary embodiment of this application. The vehicle in this application may include one or more of the following components: a processor 110, a memory 120, an input device 130, an output device 140, and a bus 150. The processor 110, memory 120, input device 130, and output device 140 may be connected via the bus 150.

[0107] Processor 110 may include one or more processing cores. Processor 110 connects to various parts of the terminal using various interfaces and lines, and performs various functions and processes data of terminal 100 by running or executing instructions, programs, code sets, or instruction sets stored in memory 120, and by calling data stored in memory 120. Optionally, processor 110 may be implemented using at least one hardware form of digital signal processing (DSP), field-programmable gate array (FPGA), or programmable logic array (PLA). Processor 110 may integrate one or more of the following: central processing unit (CPU), graphics processing unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the displayed content; and the modem handles wireless communication. It is understood that the modem may also not be integrated into processor 110 and may be implemented separately using a communication chip.

[0108] The memory 120 may include random access memory (RAM) or read-only memory (ROM). Optionally, the memory 120 may include non-transitory computer-readable storage medium. The memory 120 may be used to store instructions, programs, code, code sets, or instruction sets. The memory 120 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (e.g., touch function, sound playback function, image playback function, etc.), instructions for implementing the various method embodiments described below, etc. The operating system may be the Android system, including systems deeply developed based on the Android system, the iOS system developed by Apple Inc., including systems deeply developed based on the iOS system, or other systems.

[0109] In order for the operating system to distinguish the specific application scenarios of third-party applications, it is necessary to establish data communication between the third-party applications and the operating system. This would allow the operating system to obtain the current scenario information of the third-party applications at any time, and then perform targeted system resource adaptation based on the current scenario.

[0110] The input device 130 is used to receive input instructions or data, and includes, but is not limited to, a keyboard, mouse, camera, microphone, or touch device. The output device 140 is used to output instructions or data, and includes, but is not limited to, a display device and a speaker. In one example, the input device 130 and the output device 140 can be combined, and the input device 130 and the output device 140 can be a touch display screen.

[0111] The touch display screen can be designed as a full-screen, curved screen, or irregularly shaped screen. It can also be designed as a combination of a full-screen and a curved screen, or a combination of an irregularly shaped screen and a curved screen; however, this specification does not limit the specific designs in the embodiments described herein.

[0112] exist Figure 5 In the vehicle shown, the processor 110 can be used to call the battery protection method program stored in the memory 120, and specifically perform the following operations:

[0113] Obtain the estimated remaining battery capacity of the battery pack as estimated by the battery management system;

[0114] Obtain the actual remaining power of the battery pack;

[0115] Based on the estimated remaining power and the actual remaining power, it is determined whether the battery pack has a risk of over-discharge.

[0116] If it is determined that the battery pack poses a risk of over-discharge, then the hybrid vehicle is controlled to disable preset functions.

[0117] In one embodiment, when processor 110 performs the operation of determining whether the battery pack has a risk of over-discharge based on the estimated remaining power and the actual remaining power, it specifically performs the following operations:

[0118] Calculate the difference between the estimated remaining power and the actual remaining power;

[0119] If the difference is greater than or equal to the first difference threshold, and the actual remaining power is less than or equal to the power threshold, then it is determined that the battery pack has a risk of over-discharge.

[0120] In one embodiment, when the processor 110 executes the statement "If the difference is greater than or equal to the first difference threshold, and the actual remaining battery power is less than or equal to the battery power threshold", it specifically performs the following operations:

[0121] If the duration for which the difference is greater than or equal to the first difference threshold is greater than a preset duration, and the duration for which the actual remaining power is less than or equal to the power threshold is greater than the preset duration, then it is determined that the battery pack has a risk of over-discharge.

[0122] In one embodiment, the processor 110 also performs the following operations:

[0123] If it is determined that the battery pack has a risk of over-discharge, the hybrid vehicle is controlled to send a prompt message to the terminal corresponding to the hybrid vehicle. The prompt message is used to prompt the user corresponding to the terminal to set the target battery level of the hybrid vehicle to a preset level.

[0124] In one embodiment, when the processor 110 performs the step of obtaining the actual remaining power of the battery pack, it specifically performs the following operations:

[0125] Identify the target battery within the battery pack;

[0126] The actual remaining power of the battery pack is calculated based on the capacity of the target battery.

[0127] In one embodiment, after executing the command to disable the preset function of the hybrid vehicle, the processor 110 also performs the following operations:

[0128] Based on the estimated remaining power and the actual remaining power, determine whether the battery pack meets the risk clearance conditions;

[0129] If it is determined that the battery pack meets the risk clearance condition, then the hybrid vehicle is controlled to stop disabling the preset function.

[0130] In one embodiment, when processor 110 determines whether the battery pack meets the risk clearance conditions based on the estimated remaining power and the actual remaining power, it specifically performs the following operations:

[0131] Calculate the difference between the estimated remaining power and the actual remaining power;

[0132] If the difference is less than the second difference threshold, and the actual remaining power is less than or equal to the power threshold, and the duration for which the difference is less than the second difference threshold and the duration for which the actual remaining power is less than or equal to the power threshold are both greater than or equal to the duration threshold, then the battery pack is determined to meet the risk clearance condition.

[0133] In addition, those skilled in the art will understand that the vehicle structure shown in the above figures does not constitute a limitation on the vehicle. A vehicle may include more or fewer components than shown, or combine certain components, or have different component arrangements. For example, the vehicle may also include radio frequency circuits, input units, sensors, audio circuits, Wireless Fidelity (WiFi) modules, power supplies, Bluetooth modules, etc., which will not be described in detail here.

[0134] This application also provides a computer-readable storage medium storing at least one instruction that is executed by a processor to implement the battery protection method as described in the above embodiments.

[0135] This application also provides a computer program product that stores at least one instruction, which is loaded and executed by the processor to implement the battery protection method described in the above embodiments.

[0136] Those skilled in the art will recognize that the functions described in the embodiments of this application in one or more of the above examples can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0137] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery protection method applied to a hybrid vehicle, characterized by, The method includes: Obtain the estimated remaining capacity of the battery pack as estimated by the battery management system; wherein, the estimated remaining capacity is the average value of the state of charge (SOC) value of each battery in the battery pack. Obtain the actual remaining power of the battery pack; wherein, the actual remaining power is the minimum remaining power among the remaining power of the multiple batteries that make up the battery pack; Calculate the difference between the estimated remaining power and the actual remaining power; If the difference is greater than or equal to the first difference threshold, and the actual remaining power is less than or equal to the power threshold, then it is determined that the battery pack has a risk of over-discharge. If it is determined that the battery pack poses a risk of over-discharge, then the hybrid vehicle is controlled to disable preset functions.

2. The method of claim 1, wherein, If the difference is greater than or equal to the first difference threshold, and the actual remaining battery capacity is less than or equal to the battery capacity threshold, then it is determined that the battery pack has a risk of over-discharge, including: If the duration for which the difference is greater than or equal to the first difference threshold is greater than a preset duration, and the duration for which the actual remaining power is less than or equal to the power threshold is greater than the preset duration, then it is determined that the battery pack has a risk of over-discharge.

3. The method according to claim 1, characterized in that, The method further includes: If it is determined that the battery pack has a risk of over-discharge, the hybrid vehicle is controlled to send a prompt message to the terminal corresponding to the hybrid vehicle. The prompt message is used to prompt the user corresponding to the terminal to set the target battery level of the hybrid vehicle to a preset level.

4. The method according to claim 1, characterized in that, The step of obtaining the actual remaining power of the battery pack includes: Identify the target battery within the battery pack; The actual remaining power of the battery pack is calculated based on the capacity of the target battery.

5. The method according to any one of claims 1-4, characterized in that, After disabling the preset functions of the hybrid vehicle, the method further includes: Based on the estimated remaining power and the actual remaining power, determine whether the battery pack meets the risk clearance conditions; If it is determined that the battery pack meets the risk clearance condition, then the hybrid vehicle is controlled to stop disabling the preset function.

6. The method according to claim 5, characterized in that, The step of determining whether the battery pack meets the risk clearance conditions based on the estimated remaining power and the actual remaining power includes: Calculate the difference between the estimated remaining power and the actual remaining power; If the difference is less than the second difference threshold, and the actual remaining power is less than or equal to the power threshold, and the duration for which the difference is less than the second difference threshold and the duration for which the actual remaining power is less than or equal to the power threshold are both greater than or equal to the duration threshold, then the battery pack is determined to meet the risk clearance condition.

7. A battery protection device applied to a hybrid vehicle, characterized in that, The device includes: The first acquisition module is used to acquire the estimated remaining power of the battery pack as estimated by the battery management system; wherein, the estimated remaining power is the average value of the state of charge (SOC) value of each battery in the battery pack. The second acquisition module is used to acquire the actual remaining power of the battery pack; wherein, the actual remaining power is the minimum remaining power among the remaining power of the multiple batteries that make up the battery pack; The risk assessment module is used to calculate the difference between the estimated remaining power and the actual remaining power; if the difference is greater than or equal to a first difference threshold, and the actual remaining power is less than or equal to a power threshold, then it is determined that the battery pack has a risk of battery over-discharge; The risk operation module is used to control the hybrid vehicle to disable preset functions if it is determined that there is a risk of over-discharge of the battery pack.

8. A computer storage medium, characterized in that, The computer storage medium stores a plurality of instructions, which are adapted to be loaded by a processor and executed as the method steps of any one of claims 1 to 6.

9. A vehicle, characterized in that, include: A processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and executed the method steps as claimed in any one of claims 1 to 6.

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