A vehicle power feeding early warning method, device and storage medium

Abstract

This invention relates to the field of battery or accumulator technology, specifically providing a vehicle low-battery warning method, device, and storage medium. The method includes the following steps: upon receiving a trigger signal, acquiring the battery capacity of the accumulator and the power battery; acquiring the effective capacity coefficient of the accumulator at different temperatures; acquiring the charging time required for the accumulator to charge within its intelligent charging range at the different temperatures; determining the warning time for the accumulator to experience low battery based on the charging time, the battery capacity of the accumulator and the power battery, the effective capacity coefficient, and preset vehicle calibration parameters; and issuing a warning when the warning time is less than a specified duration. This invention, through a series of logical processing, signal acquisition, signal transmission, and data display, ultimately estimates the time when the vehicle will experience low battery and reminds the owner to charge the vehicle in time via a screen display, thereby greatly reducing the risk of vehicle low battery.

Description

Technical Field

[0001] This invention belongs to the field of battery or storage battery technology, and specifically relates to a vehicle power depletion warning method, device and storage medium. Background Technology

[0002] The issue of battery depletion in new energy vehicles has always been a persistent pain point in the industry. Battery performance degrades significantly at low temperatures, with effective capacity decreasing by 20%-50%. Especially with current industry trends—as passenger vehicles increasingly feature advanced electronic components and components—the use of semiconductors has increased dramatically, leading to greater dark current in controllers and exacerbating the challenge of battery depletion. OEMs typically opt for larger capacity batteries or lithium-ion battery solutions, but this increases the overall vehicle cost.

[0003] To address issues of dark current consumption and battery costs, some OEMs are now employing intelligent charging technology. This technology periodically monitors the battery capacity. When it falls below a set lower limit (SOC-A), the DC / DC converter is activated, and the power battery charges the battery via the DC / DC converter. Once the SOC-B is reached, the DC / DC converter goes into sleep mode. This solution largely solves the battery depletion problem. However, the length of time a vehicle is idle depends to some extent on the remaining battery charge. Logically, intelligent charging cannot occur when the remaining battery charge is insufficient. If car owners are unaware of the intelligent charging logic and fail to charge the battery to an ideal SOC value in a timely manner, battery depletion can easily occur, causing considerable inconvenience.

[0004] Currently, industry applications of intelligent charging only consider the characteristics of DC-DC converters and battery charging and discharging technologies, without taking into account the overall vehicle energy consumption system. During intelligent charging, factors such as the power consumption of various related controllers, the conversion efficiency of DC-DC converters, the charging efficiency of batteries, and charging time all contribute to energy loss. Therefore, the accuracy of the prediction model depends on a comprehensive consideration of system losses during the charging process and the accuracy of the parameters. Summary of the Invention

[0005] The purpose of this invention is to provide a vehicle power depletion warning method, device, and storage medium to address the problem that existing intelligent power replenishment applications do not consider the overall vehicle energy consumption system.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, this application provides a vehicle battery depletion warning method, comprising the following steps:

[0008] S110, after receiving the trigger signal, obtains the battery capacity of the storage battery and the power battery;

[0009] S120, Obtain the effective capacity coefficient of the battery at different temperatures;

[0010] S130, obtain the charging time required for the battery to charge within the intelligent charging range at different temperatures;

[0011] S140, based on the recharge time, the battery capacity of the storage battery and the power battery, the effective capacity coefficient and the preset vehicle calibration parameters, determine the warning time when the storage battery will be depleted;

[0012] S150, when the warning time is less than the specified duration, a warning prompt is issued.

[0013] In conjunction with the first aspect, in some optional embodiments, the calibration parameters include the vehicle dark current, the total capacity of the power battery, the minimum remaining capacity of the power battery, the total capacity of the storage battery, the power consumption of the controller involved during charging, the operating voltage of the controller, the conversion efficiency of the DC / DC converter, and the intelligent charging range of the storage battery, wherein the intelligent charging range is from a first capacity to a second capacity.

[0014] In conjunction with the first aspect, in some alternative implementations, the first capacity is 80% and the second capacity is 95%.

[0015] In conjunction with the first aspect, in some alternative implementations, the trigger signal is an electrical signal indicating that the vehicle is in the OFF position.

[0016] In conjunction with the first aspect, in some optional embodiments, S140 includes: determining the time when the battery experiences a power outage using a preset formula, wherein the preset formula is:

[0017] D*24*A=H1*(SOC2-SOC 2-1 )+H2*η*(SOC1-80%)-(24*A*D / 15%*H2*η+1)*15%*H2*η*(1-S1)

[0018] / S1-(24*A*D / 15%*H2*η+1)*W1*T / (9*3600),

[0019] Where A represents the vehicle's dark current, H1 represents the total capacity of the power battery, and SOC... 2-1H2 represents the minimum remaining capacity of the power battery, W1 represents the total capacity of the battery, S1 represents the power consumption of the controller involved in the charging period, η represents the conversion efficiency of the DC / DC converter, T represents the effective capacity coefficient of the battery at different temperatures, T represents the charging time required for the intelligent charging range of the battery, SOC2 represents the battery capacity of the power battery, SOC1 represents the battery capacity of the battery, and D represents the number of days the battery is depleted.

[0020] In conjunction with the first aspect, in some alternative implementations, H1*(SOC2-SOC) 2-1 H2*η*(SOC1-80%) is the consuming capacity of the power battery when the vehicle is powered off, (24*A*D / 15%*H2*η+1) is the number of times intelligent charging occurs during vehicle idling, 15%*H2*η*(1-S1) / S1 is the energy loss in the DC / DC converter during each intelligent charging, and W1*T / (9*3600) is the energy consumed by other electrical appliances during each intelligent charging.

[0021] Secondly, this application provides a vehicle battery depletion warning device, comprising the following units:

[0022] The first acquisition unit acquires the battery capacity of the storage battery and the power battery after receiving the trigger signal;

[0023] The second acquisition unit obtains the effective capacity coefficient of the battery at different temperatures.

[0024] The third acquisition unit acquires the charging time required for the battery to be charged within the intelligent charging range at different temperatures.

[0025] The processing unit determines the warning time when the battery is depleted based on the recharging time, the battery capacity of the storage battery and the power battery, the effective capacity coefficient, and the preset vehicle calibration parameters;

[0026] The early warning unit issues an early warning notification when the early warning time is less than a specified duration.

[0027] Thirdly, this application provides a computer storage medium storing a computer program that, when run on a computer, can execute the vehicle power depletion warning method as described above.

[0028] The invention employing the above technical solution has the following advantages:

[0029] This application, when the vehicle is powered off and stationary in the future, uses an algorithm to estimate the battery depletion time under these conditions by combining the effects of external ambient temperature on battery charging and discharging characteristics, the remaining capacity of the power battery, the preset minimum reserve capacity of the power battery, the battery charging range, the charging time of each charge, the controller power consumption during charging, and the DC-DC conversion efficiency. The algorithm then projects this estimate onto the screen and provides feedback to the vehicle owner. By fully considering system losses and corresponding parameters during charging, this application accurately predicts the battery depletion model and precisely forecasts the time when the battery will deplete. Attached Figure Description

[0030] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0031] Figure 1 This is a flowchart illustrating the vehicle power depletion warning method in the embodiments of this application;

[0032] Figure 2 This is a logic diagram of the vehicle power depletion warning method in the embodiments of this application;

[0033] Figure 3 This is a schematic diagram of the vehicle power depletion warning device in the embodiments of this application.

[0034] The symbols for the main components are explained below:

[0035] 10: First acquisition unit; 20: Second acquisition unit; 30: Third acquisition unit; 40: Processing unit; 50: Early warning unit. Detailed Implementation

[0036] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. In the description of this application, terms such as "first" and "second" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] Combined with appendix Figure 1 and attached Figure 2 This application provides a vehicle low battery warning method, including the following steps:

[0038] S110, after receiving the trigger signal, obtains the battery capacity of the storage battery and the power battery;

[0039] S120, Obtain the effective capacity coefficient of the battery at different temperatures;

[0040] S130, obtain the charging time required for the battery to charge within the intelligent charging range at different temperatures;

[0041] S140, based on the recharge time, the battery capacity of the storage battery and the power battery, the effective capacity coefficient and the preset vehicle calibration parameters, determine the warning time when the storage battery will be depleted;

[0042] S150, when the warning time is less than the specified duration, a warning prompt is issued.

[0043] In step S110, after receiving the trigger signal, the battery capacities of the storage battery and the power battery are acquired. Specifically, when the vehicle owner presses the OFF button to turn off the power, the vehicle area controller acquires the capacity signal—SOC1—transmitted by the storage battery sensor, the power battery capacity—SOC2—transmitted by the power battery BMS, and the external ambient temperature X.

[0044] In step S120, the vehicle's calibration parameters are preset, and the effective capacity coefficient of the battery at different temperatures is obtained. Specifically, the vehicle's dark current is preset to A, the total capacity of the power battery is H1, and the minimum remaining capacity of the power battery is SOC. 2-1 The total battery capacity is H2, the controller power consumption during intelligent charging is W1, the controller operating voltage range is 9-16V, the DC / DC conversion efficiency is S1, and the intelligent charging range is 95%-80% of the battery's effective capacity. Extensive measurements have shown that the battery's effective capacity coefficient η at different temperatures satisfies the following formula:

[0045] eta={eta1, eta2, eta3, eta4};

[0046] Where η1 = 1 is the effective capacity coefficient at a temperature of 0-25℃; η2 is the effective capacity coefficient at a temperature of -10℃ to 0℃; η3 is the effective capacity coefficient at a temperature of -20℃ to 10℃; and η4 is the effective capacity coefficient at a temperature of -30℃ to 20℃.

[0047] In step S130, the charging time required for the intelligent charging range of the battery is obtained. The battery supplier, through extensive experiments in an environmental chamber, determined that under different temperatures and with constant voltage and current limiting charging, the time T required to charge the battery from 80% to 95% of its effective capacity satisfies the following formula:

[0048] T = {T1, T2, T3, T4};

[0049] Wherein, T1 is the time required to charge from 80% to 95% of the effective capacity at a temperature of 0-25℃; T2 is the time required to charge from 80% to 95% of the effective capacity at a temperature of -10℃ to 0℃; T3 is the time required to charge from 80% to 95% of the effective capacity at a temperature of -20℃ to 10℃; and T4 is the time required to charge from 80% to 95% of the effective capacity at a temperature of -30℃ to 20℃.

[0050] In step S140, the warning time for battery depletion is determined based on the recharge time, the battery capacity of the storage battery and the power battery, the effective capacity coefficient, and the preset vehicle calibration parameters. The number of days D corresponding to the warning time of battery depletion satisfies the following formula:

[0051] D*24*A=H1*(SOC2-SOC 2-1 )+H2*η*(SOC1-80%)-(24*A*D / 15%*H2*η+1)*15%*H2*η*(1-S1)

[0052] / S1-(24*A*D / 15%*H2*η+1)*W1*T / (9*3600);

[0053] Wherein, H1*(SOC2-SOC) 2-1 H2*(SOC1-80%) is the consuming capacity of the power battery when the vehicle is powered off; H2*(SOC1-80%) is the consuming capacity of the storage battery when the vehicle is powered off; 24*A*D / 15%*H2+1 is the number of times intelligent charging occurs during vehicle idling; 15%*H2*(1-S1) / S1 is the energy loss in the DC / DC converter during each intelligent charging; W1*T / (9*3600) is the energy consumed by other electrical appliances during each intelligent charging.

[0054] In step S150, a warning is issued when the warning time is less than a specified duration. When the warning time is less than a preset specified duration (e.g., 3 days), a corresponding warning is sent to the vehicle controller via the CAN bus and displayed on the screen to prompt the owner to charge the vehicle in advance as needed.

[0055] Combined with appendix Figure 3 This application provides a vehicle low battery warning device. The device includes at least one software function module stored in a storage module or embedded in an operating system (OS) in the form of software or firmware. Processing equipment is used to execute the executable module stored in the storage module, such as the software function module and computer program module included in the vehicle low battery warning device.

[0056] The device includes a first acquisition unit 10, a second acquisition unit 20, a third acquisition unit 30, a processing unit 40, and an early warning unit 50. The functions of each unit are as follows:

[0057] The first acquisition unit 10 acquires the battery capacity of the storage battery and the power battery after receiving the trigger signal.

[0058] The second acquisition unit 20 acquires the effective capacity coefficient of the battery at different temperatures;

[0059] The third acquisition unit 30 acquires the charging time required for the battery to be charged within the intelligent charging range at different temperatures.

[0060] Processing unit 40 determines the warning time when the battery is depleted based on the recharge time, the battery capacity of the storage battery and the power battery, the effective capacity coefficient and the preset vehicle calibration parameters;

[0061] The early warning unit 50 issues an early warning prompt when the early warning time is less than a specified duration.

[0062] In this embodiment, the storage module can be, but is not limited to, random access memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, etc. In this embodiment, the storage module can be used to store the specified duration of each warning unit 50. Of course, the storage module can also be used to store programs, which the processing module executes after receiving the execution instruction. The data acquisition, preset, and processing processes can refer to the vehicle power depletion warning method described above, and will not be elaborated further here.

[0063] This application also provides a computer storage medium storing a computer program. When the computer program is run on a computer, it causes the computer to execute the vehicle power depletion warning method as described in the above embodiments.

[0064] Based on the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by hardware or by using software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of this application can be embodied in the form of a software product. This software product can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, mobile hard drive, etc.) and includes several instructions to cause a computer device (such as a personal computer, electronic device, or network device, etc.) to execute the methods described in the various implementation scenarios of this application.

[0065] In summary, this application provides a vehicle battery depletion warning method, device, and storage medium. The method includes the following steps: upon receiving a trigger signal, acquiring the battery capacity of the storage battery and the power battery; acquiring the effective capacity coefficient of the storage battery at different temperatures; acquiring the charging time required for the storage battery to charge within the intelligent charging range at the different temperatures; determining the warning time for battery depletion based on the charging time, the battery capacity of the storage battery and the power battery, the effective capacity coefficient, and preset vehicle calibration parameters; and issuing a warning when the warning time is less than a specified duration. This invention, through a series of logical processing, signal acquisition, signal transmission, and data display, ultimately estimates the time when the vehicle is about to experience battery depletion and reminds the owner to charge the vehicle in time via screen display, thereby greatly reducing the risk of vehicle battery depletion. It possesses a high-end, technologically advanced feel, cutting-edge technology, high reliability, and is easy to implement, making it highly valuable for practical applications.

[0066] In the embodiments provided in this application, it should be understood that the disclosed apparatus, systems, and methods can also be implemented in other ways. The apparatus, systems, and methods embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code, which includes one or more executable instructions for implementing a specified logical function. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions. Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0067] The foregoing has provided a detailed description of a vehicle power depletion warning method, device, and storage medium provided by the present invention. The specific embodiments described are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A method for early warning of vehicle battery depletion, characterized in that, The method includes: S110, after receiving the trigger signal, obtains the battery capacity of the storage battery and the power battery; S120, Obtain the effective capacity coefficient of the battery at different temperatures; S130, obtain the charging time required for the battery to charge within the intelligent charging range at different temperatures; S140, based on the recharge time, the battery capacity of the storage battery and the power battery, the effective capacity coefficient and the preset vehicle calibration parameters, determine the warning time when the storage battery will be depleted; S150, when the warning time is less than the specified duration, a warning prompt is issued; The calibration parameters include the vehicle's dark current, the total capacity of the power battery, the minimum remaining capacity of the power battery, the total capacity of the storage battery, the power consumption of the controller involved during charging, the operating voltage of the controller, the conversion efficiency of the DC / DC converter, and the intelligent charging range of the storage battery, wherein the intelligent charging range is from a first capacity to a second capacity, the first capacity being 80% and the second capacity being 95%. S140 includes: determining the time when the battery experiences a power outage using a preset formula, wherein the preset formula is: D*24*A=H1*(SOC2-SOC 2-1 )+H2*η*(SOC1-80%)-(24*A*D / (15%*H2*η)+1)*15%*H2* η*(1-S1) / S1-(24*A*D / (15%*H2*η)+1)*W1*T / (9*3600), Where A represents the vehicle's dark current, H1 represents the total capacity of the power battery, and SOC... 2-1 H1 represents the minimum remaining capacity of the power battery, H2 represents the total capacity of the battery, W1 represents the power consumption of the controller involved in the charging period, S1 is the conversion efficiency of the DC / DC converter, η is the effective capacity coefficient of the battery at different temperatures, T is the charging time required for the intelligent charging range of the battery, SOC2 represents the battery capacity of the power battery, SOC1 is the battery capacity of the storage battery, and D is the number of days the battery is depleted. In the preset formula, H1*(SOC2-SOC) 2-1 H2*η*(SOC1-80%) is the consuming capacity of the power battery when the vehicle is powered off, (24*A*D / (15%*H2*η)+1) is the number of times the vehicle is stationary and intelligent charging occurs, 15%*H2*η*(1-S1) / S1 is the energy loss in the DC / DC converter during each intelligent charging, and W1*T / (9*3600) is the energy consumed by other electrical appliances during each intelligent charging.

2. The vehicle power depletion early warning method according to claim 1, characterized in that, The trigger signal is the electrical signal when the vehicle is in the OFF position.

3. A vehicle power depletion early warning device, characterized in that, Includes the following units: The first acquisition unit acquires the battery capacity of the storage battery and the power battery after receiving the trigger signal; The second acquisition unit obtains the effective capacity coefficient of the battery at different temperatures. The third acquisition unit acquires the charging time required for the battery to be charged within the intelligent charging range at different temperatures. The processing unit determines the warning time when the battery is depleted based on the recharging time, the battery capacity of the storage battery and the power battery, the effective capacity coefficient, and the preset vehicle calibration parameters; The early warning unit issues an early warning notification when the early warning time is less than a specified duration. The calibration parameters include the vehicle's dark current, the total capacity of the power battery, the minimum remaining capacity of the power battery, the total capacity of the storage battery, the power consumption of the controller involved during charging, the operating voltage of the controller, the conversion efficiency of the DC / DC converter, and the intelligent charging range of the storage battery, wherein the intelligent charging range is from a first capacity to a second capacity, the first capacity being 80% and the second capacity being 95%. The processing unit is further configured to: determine the time when the battery experiences a power outage using a preset formula, wherein the preset formula is: D*24*A=H1*(SOC2-SOC 2-1 )+H2*η*(SOC1-80%)-(24*A*D / (15%*H2*η)+1)*15%*H2* η*(1-S1) / S1-(24*A*D / (15%*H2*η)+1)*W1*T / (9*3600), Where A represents the vehicle's dark current, H1 represents the total capacity of the power battery, and SOC... 2-1 H1 represents the minimum remaining capacity of the power battery, H2 represents the total capacity of the battery, W1 represents the power consumption of the controller involved in the charging period, S1 is the conversion efficiency of the DC / DC converter, η is the effective capacity coefficient of the battery at different temperatures, T is the charging time required for the intelligent charging range of the battery, SOC2 represents the battery capacity of the power battery, SOC1 is the battery capacity of the storage battery, and D is the number of days the battery is depleted. In the preset formula, H1*(SOC2-SOC) 2-1 H2*η*(SOC1-80%) is the consuming capacity of the power battery when the vehicle is powered off, (24*A*D / (15%*H2*η)+1) is the number of times the vehicle is stationary and intelligent charging occurs, 15%*H2*η*(1-S1) / S1 is the energy loss in the DC / DC converter during each intelligent charging, and W1*T / (9*3600) is the energy consumed by other electrical appliances during each intelligent charging.

4. A computer storage medium, characterized in that, The computer storage medium stores a computer program, which, when run on a computer, can execute the vehicle power depletion warning method as described in any one of claims 1-2.

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