Method for protecting an automotive battery pack from depletion and related device

Abstract

The application provides a battery package power loss protection method and related device. The method comprises: monitoring the output current and SOC value of the battery package in the automobile; determining whether the battery package meets the power loss determination condition according to a preset time interval; the power loss determination condition comprises that the current SOC value of the battery package is less than a preset SOC threshold value and the current output current of the battery package is greater than a preset current threshold value; each time the battery package is determined to meet the power loss determination condition, the cumulative value is increased by a unit value; if it is monitored that the battery package does not meet the power loss determination condition, the cumulative value is reset to an initial value; if it is monitored that the cumulative value is greater than a preset cumulative threshold value, the automobile is controlled to reduce the power consumption. Through the above scheme, the vehicle controller can jointly determine whether the battery is power loss through the output current and SOC value of the battery, and when it is determined that the battery is power loss, the battery power loss is avoided by reducing the power consumption of the automobile, thereby improving the effect of the automobile battery power loss protection.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a method and related device for protecting an automotive battery pack from power loss. Background Technology

[0002] In HEV (Hybrid Electric Vehicle) vehicles, the battery pack is primarily charged by the motor driven by the engine. If there is an malfunction in the engine or motor, causing the vehicle to be unable to charge the battery pack or the charging efficiency to be far lower than the power consumed by the vehicle, the battery pack will be depleted. Once the battery pack is depleted, the vehicle will not be able to drive normally and will not be able to connect to high voltage. If the depletion is severe, the battery pack will need to be replaced.

[0003] In existing technologies, the battery management system disconnects the battery relay when the battery pack charge is below a certain value. However, since this method only considers the battery pack charge, the accuracy of judging battery depletion is poor, resulting in poor protection against battery depletion. Summary of the Invention

[0004] This application provides a method and related device for protecting an automotive battery pack from power loss, in order to solve the problem of poor power loss protection effect of automotive battery packs in the prior art.

[0005] In a first aspect, this application provides a method for protecting an automotive battery pack from power loss, including:

[0006] Monitor the output current and SOC value of the battery pack in the car;

[0007] The battery pack is judged to meet the low power judgment condition according to a preset time interval. The low power judgment condition includes the current SOC value of the battery pack being less than a preset SOC threshold and the current output current of the battery pack being greater than a preset current threshold.

[0008] Each time the battery pack is determined to meet the low-power condition, the cumulative value is increased by one unit; if the battery pack is detected to not meet the low-power condition, the cumulative value is reset to the initial value.

[0009] If the cumulative value is detected to be greater than a preset cumulative threshold, the vehicle will be controlled to reduce its electricity consumption.

[0010] In one possible implementation, before controlling the vehicle to reduce its electricity consumption if the cumulative value is detected to be greater than a preset cumulative threshold, the method further includes:

[0011] Obtain the preset SOC threshold;

[0012] The counting threshold corresponding to the preset SOC threshold is determined based on the SOC pulse spectrum, and the counting threshold is used as the preset cumulative threshold; the SOC pulse spectrum includes the correspondence between SOC values ​​and counting thresholds.

[0013] In one possible implementation, the SOC value in the SOC pulse spectrum is directly proportional to the counting threshold.

[0014] In one possible implementation, the step of controlling the vehicle to reduce its electricity consumption if the cumulative value is detected to be greater than a preset cumulative threshold includes:

[0015] If the cumulative value is greater than the preset cumulative threshold, the power depletion output flag is set to the first value; otherwise, the power depletion output flag is set to the second value.

[0016] If the low-power output flag remains at the first value for a first preset time, the vehicle is controlled to reduce its power consumption.

[0017] In one possible implementation, the power depletion judgment condition specifically includes: both the main positive relay and the main negative relay of the battery pack are not in the normal open circuit state, the current SOC value of the battery pack is less than the preset SOC threshold, and the current output current of the battery pack is greater than the preset current threshold.

[0018] In one possible implementation, controlling the vehicle to reduce electricity consumption includes:

[0019] At least one electrical device controlling the vehicle is turned off.

[0020] Secondly, this application provides a low-voltage protection device for an automotive battery pack, comprising:

[0021] The battery pack data monitoring module is used to monitor the output current and SOC value of the battery pack in the vehicle.

[0022] The battery pack is used to determine whether it meets the low battery condition according to a preset time interval. The low battery condition includes the current SOC value of the battery pack being less than a preset SOC threshold and the current output current of the battery pack being greater than a preset current threshold.

[0023] The cumulative value calculation module is used to increment the cumulative value by a unit value each time the battery pack meets the low-power judgment condition; if the battery pack does not meet the low-power judgment condition, the cumulative value is reset to the initial value.

[0024] The power loss protection module is used to control the vehicle to reduce its power consumption if the detected cumulative value is greater than a preset cumulative threshold.

[0025] In one possible implementation, the vehicle battery pack's low-power protection device further includes a preset cumulative threshold acquisition module, used for:

[0026] Obtain the preset SOC threshold;

[0027] The counting threshold corresponding to the preset SOC threshold is determined based on the SOC pulse spectrum, and the counting threshold is used as the preset cumulative threshold; the SOC pulse spectrum includes the correspondence between SOC values ​​and counting thresholds.

[0028] In one possible implementation, the SOC value in the SOC pulse spectrum is directly proportional to the counting threshold.

[0029] In one possible implementation, the power outage protection module includes:

[0030] If the cumulative value is greater than the preset cumulative threshold, the power depletion output flag is set to the first value; otherwise, the power depletion output flag is set to the second value.

[0031] If the low-power output flag remains at the first value for a first preset time, the vehicle is controlled to reduce its power consumption.

[0032] In one possible implementation, the power depletion judgment condition specifically includes: both the main positive relay and the main negative relay of the battery pack are not in the normal open circuit state, the current SOC value of the battery pack is less than the preset SOC threshold, and the current output current of the battery pack is greater than the preset current threshold.

[0033] In one possible implementation, the power outage protection module specifically includes:

[0034] At least one electrical device controlling the vehicle is turned off.

[0035] Thirdly, this application provides a vehicle controller, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the vehicle battery pack power loss protection method as described in the possible implementation of the first aspect above.

[0036] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the vehicle battery pack power loss protection method as described in any possible implementation of the first aspect above.

[0037] Fifthly, embodiments of this application provide an automotive battery pack that includes the vehicle controller described in the third aspect above.

[0038] This application provides a method and related apparatus for protecting an automotive battery pack from low-charge levels. The method first monitors the output current and State of Charge (SOC) value of the battery pack in the vehicle. Then, it determines whether the battery pack meets low-charge judgment conditions at preset time intervals. The low-charge judgment conditions include that the current SOC value of the battery pack is less than a preset SOC threshold and the current output current of the battery pack is greater than a preset current threshold. Each time the battery pack meets the low-charge judgment conditions, the accumulated value is increased by one unit. If the battery pack does not meet the low-charge judgment conditions, the accumulated value is reset to its initial value. If the accumulated value is greater than a preset accumulated threshold, the vehicle's power consumption is reduced. Through this scheme, the vehicle controller can determine whether the battery is low-charged by jointly using the battery's output current and SOC value. When a low-charge condition is determined, the controller reduces the vehicle's power consumption to prevent further battery depletion, thereby improving the effectiveness of automotive battery low-charge protection. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a flowchart illustrating the implementation of the battery pack power loss protection method for automobiles provided in this application embodiment;

[0041] Figure 2 This is a schematic diagram of the structure of the vehicle battery pack power loss protection device provided in the embodiments of this application;

[0042] Figure 3 This is a schematic diagram of the vehicle controller provided in an embodiment of this application. Detailed Implementation

[0043] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the following description will be provided in conjunction with the accompanying drawings and specific embodiments.

[0045] See Figure 1The document illustrates a flowchart of the implementation of the battery pack power loss protection method provided in this application embodiment, which is described in detail below:

[0046] S101: Monitors the output current and SOC (state of charge) value of the battery pack in the vehicle.

[0047] In this embodiment, the execution entity is the vehicle control unit (VCU). The VCU obtains the output current of the battery pack through current measurement devices and requests the current SOC value of the battery pack from the battery management system.

[0048] Specifically, the battery pack involved in this embodiment is a power battery pack for automobiles.

[0049] S102: Determine whether the battery pack meets the low-power judgment condition according to a preset time interval; the low-power judgment condition includes that the current SOC value of the battery pack is less than a preset SOC threshold and the current output current of the battery pack is greater than a preset current threshold.

[0050] In this embodiment, a positive output current indicates discharging, and a negative output current indicates charging. Therefore, when the battery pack is charging, the smaller the output current, the faster the charging. When the current output current is greater than the preset current threshold, it indicates that the battery pack is charging slowly, which means that the engine or motor may be abnormal and unable to charge the battery or the charging efficiency is much lower than the power consumed by the vehicle. In addition, the current SOC value is less than the preset SOC threshold, so it can be determined that the battery is at risk of being depleted.

[0051] Specifically, the preset current threshold can be -2A, and the preset SOC threshold can be 25%.

[0052] S103: Each time the battery pack is determined to meet the low power condition, the cumulative value is increased by one unit value; if the battery pack is detected to not meet the low power condition, the cumulative value is reset to the initial value.

[0053] In this embodiment, to avoid the problem of false judgment of low battery caused by fluctuations in battery output current and SOC value, a timer can be set inside the vehicle controller to monitor the number of times the battery pack meets the low battery judgment condition. Each time the battery pack meets the low battery judgment condition, the timer will add a unit value to the cumulative value. If the battery pack does not meet the low battery judgment condition, the current cumulative value will be reset to the initial value.

[0054] Specifically, the initial value can be 0, the unit value is 1, and the preset time interval can be 10ms.

[0055] S104: If the cumulative value is detected to be greater than the preset cumulative threshold, the vehicle is controlled to reduce its power consumption.

[0056] In this embodiment, when the vehicle controller detects that the number of consecutive times the battery pack meets the low-power judgment condition exceeds a preset cumulative threshold, it controls the car to reduce power consumption to reduce battery consumption. At the same time, it can display low-power fault information on the vehicle display screen to remind the driver that the power battery pack is about to run out of power, thus preventing the driver from repeatedly using the battery to start the engine without knowing the battery status, which would lead to battery depletion.

[0057] As can be seen from the above embodiments, this application first monitors the output current and SOC value of the battery pack in the vehicle; then, it determines whether the battery pack meets the low-charge judgment conditions according to a preset time interval; the low-charge judgment conditions include that the current SOC value of the battery pack is less than a preset SOC threshold and the current output current of the battery pack is greater than a preset current threshold; each time the battery pack is determined to meet the low-charge judgment conditions, the cumulative value is increased by a unit value; if the battery pack is detected to not meet the low-charge judgment conditions, the cumulative value is reset to the initial value; if the cumulative value is detected to be greater than a preset cumulative threshold, the vehicle is controlled to reduce power consumption. Through the above scheme, the vehicle controller can jointly determine whether the battery is low-charge by the battery's output current and SOC value, and when the battery is determined to be low-charge, it can avoid battery depletion by reducing the vehicle's power consumption, thereby improving the effectiveness of vehicle battery low-charge protection.

[0058] In one possible implementation, before controlling the vehicle to reduce its electricity consumption if the cumulative value is detected to be greater than a preset cumulative threshold, the method further includes:

[0059] Obtain the preset SOC threshold;

[0060] The counting threshold corresponding to the preset SOC threshold is determined based on the SOC pulse spectrum, and the counting threshold is used as the preset cumulative threshold; the SOC pulse spectrum includes the correspondence between SOC values ​​and counting thresholds.

[0061] In this embodiment, to determine battery depletion under different operating conditions, a State of Charge (SOC) pulse spectrum is provided, as shown in Table 1. Table 1 illustrates the correspondence between SOC and counting thresholds. In practical applications, this SOC pulse spectrum is pre-stored in the vehicle controller. Users can manually select a preset SOC threshold according to actual conditions, and the vehicle controller will look up the corresponding counting threshold in the table based on the user-selected preset SOC threshold.

[0062] Table 1

[0063] SOC 12 15 18 21 24 25 Count threshold 1000 2000 2500 3000 4000 6000

[0064] In one possible implementation, the SOC value in the SOC pulse spectrum is directly proportional to the counting threshold.

[0065] In one possible implementation, the step of controlling the vehicle to reduce its electricity consumption if the cumulative value is detected to be greater than a preset cumulative threshold includes:

[0066] If the cumulative value is greater than the preset cumulative threshold, the power depletion output flag is set to the first value; otherwise, the power depletion output flag is set to the second value.

[0067] If the low-power output flag remains at the first value for a first preset time, the vehicle is controlled to reduce its power consumption.

[0068] In this embodiment, the first value can be 1, and the second value can be 0. When the vehicle controller detects that the low battery output flag is 1 for a first preset time, it can output low battery fault information, control the vehicle to reduce power consumption based on the low battery fault information, and save the low battery fault information. If any parameter does not meet the low battery judgment condition within the first preset time after the low battery output flag is set to 1, the accumulated value is reset to zero, the low battery output flag is set to 0, and the vehicle controller restarts the accumulation of battery low battery judgment counts.

[0069] In one possible implementation, the power depletion judgment condition specifically includes: both the main positive relay and the main negative relay of the battery pack are not in the normal open circuit state, the current SOC value of the battery pack is less than the preset SOC threshold, and the current output current of the battery pack is greater than the preset current threshold.

[0070] In this embodiment, the working states of the main positive relay and the main negative relay include normal open circuit, continuously open, stuck, and normal closed. Among them, continuously open is only triggered under specific working conditions. When neither the main positive relay nor the main negative relay is in the normal open circuit state, it indicates that the battery pack is in the normal charging and discharging process. At this time, if the current SOC value is less than the preset SOC threshold and the current output current is greater than the preset current threshold, it is determined that the battery pack meets the low-power judgment condition. If any of the above sub-conditions are not met, it is determined that the battery pack does not meet the low-power judgment condition.

[0071] In one possible implementation, controlling the vehicle to reduce electricity consumption includes:

[0072] At least one electrical device controlling the vehicle is turned off.

[0073] In this embodiment, when the vehicle controller predicts that the battery is low on power, it can control the vehicle to shut down at least one electrical device, such as controlling the vehicle to cut off the high voltage, or turning off the air conditioner and its compressor.

[0074] In one specific embodiment, the vehicle controller can set multiple preset cumulative thresholds. For example, two preset cumulative thresholds can be set, wherein the first preset cumulative threshold corresponds to the preset SOC threshold, and the second preset cumulative threshold is greater than the first preset cumulative threshold.

[0075] If the current cumulative value is detected to be greater than the first preset cumulative threshold, the air conditioner and its compressor will be turned off, and the battery will be displayed as soon as it is about to run out of power on the vehicle display screen.

[0076] If the current cumulative value is detected to be greater than the second preset cumulative threshold, it indicates that the battery power is continuously decreasing. The vehicle controller can then control the high voltage of the vehicle and shut down the air conditioner and its compressor to ensure the safety of the power battery.

[0077] In this embodiment, the battery low-power fault information can be continuously displayed on the vehicle's display screen after it is generated until the low-power flag is set to zero. If the vehicle controller still detects the low-power fault information when the vehicle is powered on again after being powered off due to a battery low-power fault (i.e., the accumulated value has not returned to zero and the low-power flag is still 1), it will continue to control the vehicle to power off, thereby further preventing battery low-power and ensuring the safe operation of the battery.

[0078] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0079] The following are device embodiments of this application. For details not described in detail, please refer to the corresponding method embodiments described above.

[0080] Figure 2 A schematic diagram of the structure of the low-voltage protection device 100 for an automotive battery pack provided in an embodiment of this application is shown. For ease of explanation, only the parts related to the embodiment of this application are shown, and are described in detail below:

[0081] like Figure 2 As shown, the low-voltage protection device 100 for the automotive battery pack includes:

[0082] The battery pack data monitoring module 110 is used to monitor the output current and SOC value of the battery pack in the vehicle.

[0083] The power depletion judgment module 120 is used to determine whether the battery pack meets the power depletion judgment conditions according to a preset time interval; the power depletion judgment conditions include the current SOC value of the battery pack being less than a preset SOC threshold and the current output current of the battery pack being greater than a preset current threshold.

[0084] The cumulative value calculation module 130 is used to increment the cumulative value by a unit value each time the battery pack meets the low power judgment condition; if the battery pack does not meet the low power judgment condition, the cumulative value is reset to the initial value.

[0085] The power loss protection module 140 is used to control the vehicle to reduce its power consumption if the cumulative value is detected to be greater than a preset cumulative threshold.

[0086] In one possible implementation, the vehicle battery pack's low-power protection device 100 further includes a preset cumulative threshold acquisition module, used for:

[0087] Obtain the preset SOC threshold;

[0088] The counting threshold corresponding to the preset SOC threshold is determined based on the SOC pulse spectrum, and the counting threshold is used as the preset cumulative threshold; the SOC pulse spectrum includes the correspondence between SOC values ​​and counting thresholds.

[0089] In one possible implementation, the SOC value in the SOC pulse spectrum is directly proportional to the counting threshold.

[0090] In one possible implementation, the power outage protection module 140 includes:

[0091] If the cumulative value is greater than the preset cumulative threshold, the power depletion output flag is set to the first value; otherwise, the power depletion output flag is set to the second value.

[0092] If the low-power output flag remains at the first value for a first preset time, the vehicle is controlled to reduce its power consumption.

[0093] In one possible implementation, the power depletion judgment condition specifically includes: both the main positive relay and the main negative relay of the battery pack are not in the normal open circuit state, the current SOC value of the battery pack is less than the preset SOC threshold, and the current output current of the battery pack is greater than the preset current threshold.

[0094] In one possible implementation, the power loss protection module 140 specifically includes:

[0095] At least one electrical device controlling the vehicle is turned off.

[0096] As can be seen from the above embodiments, the vehicle controller can determine whether the battery is low on power by combining the battery's output current and SOC value. When the battery is determined to be low on power, the controller can reduce the vehicle's power consumption to prevent the battery from becoming low on power, thereby improving the effectiveness of the vehicle's battery power protection.

[0097] This application also provides a computer program product having program code that, when run in a corresponding processor, controller, computing device, or vehicle controller, executes the steps in any of the above-described embodiments of the vehicle battery pack power loss protection method, for example... Figure 1 Steps 101 to 104 are shown. Those skilled in the art will understand that the methods and apparatus proposed in the embodiments of this application can be implemented in various forms, including hardware, software, firmware, dedicated processors, or combinations thereof. Dedicated processors may include application-specific integrated circuits (ASICs), reduced instruction set computers (RISCs), and / or field-programmable gate arrays (FPGAs). The proposed methods and apparatus are preferably implemented as a combination of hardware and software. The software is preferably installed as an application program on a program storage device. This is typically based on a machine with a computer platform, such as one or more central processing units (CPUs), random access memory (RAM), and one or more input / output (I / O) interfaces. An operating system is also typically installed on the computer platform. The various processes and functions described herein may be part of an application program, or a portion thereof may be executed by an operating system.

[0098] Figure 3 This is a schematic diagram of the vehicle controller provided in an embodiment of this application. Figure 3 As shown, the vehicle controller 3 in this embodiment includes a processor 30, a memory 31, and a computer program 32 stored in the memory 31 and executable on the processor 30. When the processor 30 executes the computer program 32, it implements the steps in the above-described embodiments of the vehicle battery pack power loss protection methods, for example... Figure 1 Steps 101 to 104 are shown. Alternatively, when the processor 30 executes the computer program 32, it implements the functions of each module / unit in the above-described device embodiments, for example... Figure 2 The functions of modules 110 to 140 are shown.

[0099] For example, the computer program 32 can be divided into one or more modules / units, which are stored in the memory 31 and executed by the processor 30 to complete / implement the solution provided in this application. The one or more modules / units can be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program 32 in the vehicle controller 3. For example, the computer program 32 can be divided into... Figure 2 Modules 110 to 140 are shown.

[0100] The vehicle controller 3 may include, but is not limited to, a processor 30 and a memory 31. Those skilled in the art will understand that... Figure 3This is merely an example of the vehicle controller 3 and does not constitute a limitation on the vehicle controller 3. It may include more or fewer components than shown, or combine certain components, or different components. For example, the vehicle controller may also include input / output devices, network access devices, buses, etc.

[0101] The processor 30 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0102] The memory 31 can be an internal storage unit of the vehicle controller 3, such as a hard drive or memory of the vehicle controller 3. The memory 31 can also be an external storage device of the vehicle controller 3, such as a plug-in hard drive, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the vehicle controller 3. Furthermore, the memory 31 can include both internal storage units and external storage devices of the vehicle controller 3. The memory 31 is used to store the computer program and other programs and data required by the vehicle controller. The memory 31 can also be used to temporarily store data that has been output or will be output.

[0103] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0104] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0105] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0106] In the embodiments provided in this application, it should be understood that the disclosed device / vehicle controller and method can be implemented in other ways. For example, the device / vehicle controller embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0107] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0108] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0109] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above-described embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the above-described embodiments of the vehicle battery pack power loss protection method. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc. It should be noted that the content contained in the computer-readable medium may be appropriately added to or subtracted from the content as required by the legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium may not include electrical carrier signals and telecommunication signals.

[0110] Furthermore, the features of the embodiments shown in the accompanying drawings or the various embodiments mentioned in this specification should not be construed as independent embodiments. Rather, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments not described in words or with reference to the accompanying drawings.

[0111] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for under-voltage protection of an automotive battery pack, characterized in that, The method is applied to a vehicle controller, and comprises the following steps: monitoring an output current and an SOC value of a battery pack in a started vehicle; determining whether the battery pack meets a power loss determination condition according to a preset time interval; the power loss determination condition comprises that a current SOC value of the battery pack is less than a preset SOC threshold and a current output current of the battery pack is greater than a preset current threshold; each time the battery pack is determined to meet the power loss determination condition, a cumulative value is increased by a unit value; if the battery pack is monitored to not meet the power loss determination condition, the cumulative value is reset to an initial value; if the cumulative value is monitored to be greater than a preset cumulative threshold, the vehicle is controlled to reduce power consumption; before the step of if the cumulative value is monitored to be greater than a preset cumulative threshold, the vehicle is controlled to reduce power consumption, the method further comprises the following steps: obtaining the preset SOC threshold; determining a count threshold corresponding to the preset SOC threshold based on an SOC map, and taking the count threshold as the preset cumulative threshold; the SOC map comprises a corresponding relationship between an SOC value and a count threshold; the SOC value and the count threshold in the SOC map are in a positive proportional relationship; the preset cumulative threshold comprises a first preset cumulative threshold and a second preset cumulative threshold; the step of if the cumulative value is monitored to be greater than a preset cumulative threshold, the vehicle is controlled to reduce power consumption comprises: if the cumulative value is monitored to be greater than the first preset cumulative threshold, an air conditioner and a compressor thereof are controlled to be turned off, and a battery is displayed to be about to lose power on a vehicle-mounted display screen; if the cumulative value is monitored to be greater than the second preset cumulative threshold, high-voltage power of the vehicle is controlled to be turned off, and the air conditioner and the compressor thereof are controlled to be turned off.

2. The method of claim 1, wherein, the step of if the cumulative value is monitored to be greater than a preset cumulative threshold, the vehicle is controlled to reduce power consumption comprises: if the cumulative value is greater than the preset cumulative threshold, a power loss output flag is set to a first value, otherwise the power loss output flag is set to a second value; if the power loss output flag is the first value for a first preset time, the vehicle is controlled to reduce power consumption.

3. The method of claim 1, wherein the method further comprises: the power loss determination condition comprises that a main positive relay and a main negative relay of the battery pack are not in a normal open circuit state, the current SOC value of the battery pack is less than the preset SOC threshold, and the current output current of the battery pack is greater than the preset current threshold.

4. The method of claim 1 to 3, wherein, the step of controlling the vehicle to reduce power consumption comprises: controlling at least one power consumption device of the vehicle to be turned off.

5. A battery depletion protection device for an automotive battery pack, characterized by, comprises: a battery pack data monitoring module, configured to monitor an output current and an SOC value of a battery pack in a started vehicle; a power loss determination module, configured to determine whether the battery pack meets a power loss determination condition according to a preset time interval; the power loss determination condition comprises that a current SOC value of the battery pack is less than a preset SOC threshold and a current output current of the battery pack is greater than a preset current threshold; a cumulative value calculation module, configured to increase a cumulative value by a unit value each time the battery pack is determined to meet the power loss determination condition; if the battery pack is monitored to not meet the power loss determination condition, the cumulative value is reset to an initial value; The power deficiency protection module is configured to control the vehicle to reduce power consumption if the cumulative value is greater than a preset cumulative threshold value. The power deficiency protection device of the vehicle battery pack further comprises a preset cumulative threshold value acquisition module configured to: acquire the preset SOC threshold value; determine a count threshold value corresponding to the preset SOC threshold value based on an SOC map, and take the count threshold value as the preset cumulative threshold value; the SOC map comprises a corresponding relationship between an SOC value and a count threshold value; the SOC value and the count threshold value in the SOC map are in a positive proportional relationship; the preset cumulative threshold value comprises a first preset cumulative threshold value and a second preset cumulative threshold value; and the power deficiency protection module is specifically configured to: if the cumulative value is greater than the first preset cumulative threshold value, control the air conditioner and the compressor thereof to be turned off, and display on a vehicle-mounted display screen that the battery is about to be in power deficiency; if the cumulative value is greater than the second preset cumulative threshold value, control the vehicle to be in high-voltage power deficiency, and turn off the air conditioner and the compressor thereof.

6. A vehicle control unit comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to implement the steps of the power deficiency protection method of the vehicle battery pack according to any one of claims 1 to 4.

7. A computer-readable storage medium storing a computer program, wherein the computer program comprises the following steps of: receiving a request for a resource from a client; determining whether the client is authorized to access the resource; and if the client is authorized to access the resource, providing the resource to the client. The computer program is executed by the processor to implement the steps of the power deficiency protection method of the vehicle battery pack according to any one of claims 1 to 4.

8. An automobile characterized by comprising: The vehicle controller comprises the vehicle controller according to claim 6.

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