Method, device and equipment for determining residual life of lead-acid storage battery and storage medium

Abstract

The invention provides a method, a device and equipment for determining the residual life of a lead-acid storage battery and a storage medium, and relates to the technical field of lead-acid storage batteries. The method comprises the following steps: when the lead-acid storage battery in the automobile discharges, detecting the actual discharge energy of the lead-acid storage battery; the actual discharge energy is determined based on the real-time voltage, the real-time current and the discharge duration of the lead-acid storage battery in the discharge process; and determining the residual life of the lead-acid storage battery based on the actual discharge energy. The problem of misjudgment in the process of determining the residual life of the lead-acid storage battery can be solved, and the accuracy of the residual life is improved.

Description

Technical Field

[0001] This invention relates to the field of lead-acid battery technology, and in particular to a method, apparatus, device, and storage medium for determining the remaining life of a lead-acid battery. Background Technology

[0002] Lead-acid batteries are an indispensable auxiliary power source for automobiles, and their lifespan and user experience have always been concerns for car users and managers.

[0003] During the use of lead-acid batteries, the vehicle's main control system typically determines the remaining lifespan of the battery by reading its static voltage and internal resistance, in order to promptly remind the user. However, the inventors have discovered that the static voltage and internal resistance of lead-acid batteries are affected not only by their remaining lifespan but also by their current state of charge. For example, when a lead-acid battery is fully charged, even if it has aged and its remaining lifespan is shortened, its static voltage and internal resistance do not change significantly compared to a lead-acid battery that has not aged.

[0004] In summary, the static voltage and internal resistance of a lead-acid battery cannot accurately reflect its remaining lifespan. The method described above for determining the remaining lifespan using static voltage and internal resistance is prone to misjudgment and has low accuracy. Summary of the Invention

[0005] This invention provides a method, apparatus, device, and storage medium for determining the remaining life of a lead-acid battery, in order to solve the problem of misjudgment in the process of determining the remaining life of a lead-acid battery.

[0006] In a first aspect, embodiments of the present invention provide a method for determining the remaining lifespan of a lead-acid battery, comprising: When the lead-acid battery inside the car is discharging, the actual discharge energy of the lead-acid battery is detected; the actual discharge energy is determined based on the real-time voltage, real-time current and discharge duration of the lead-acid battery during the discharge process. The remaining lifespan of the lead-acid battery is determined based on the actual discharge energy.

[0007] In one possible implementation, detecting the actual discharge energy of the lead-acid battery includes: The real-time power is determined based on the real-time voltage and real-time current of the lead-acid battery during the discharge process; Based on the real-time power and the discharge duration, the actual discharge energy of the lead-acid battery inside the vehicle is determined.

[0008] In one possible implementation, the method further includes: When detecting the actual discharge energy of the lead-acid battery, the actual ambient temperature of the lead-acid battery is obtained. Determining the remaining lifespan of the lead-acid battery based on the actual discharge energy includes: Based on the actual ambient temperature, the discharge duration, the actual discharge energy, and the pre-stored mapping relationship, the actual number of aging cycles corresponding to the lead-acid battery is determined; the pre-stored mapping relationship includes: the correspondence between the discharge energy and the number of aging cycles of the lead-acid battery under different ambient temperatures and different discharge durations. The remaining lifespan of the lead-acid battery inside the vehicle is determined based on the actual number of aging cycles and the pre-stored upper limit of the number of aging cycles.

[0009] In one possible implementation, the discharge process of the lead-acid battery inside the vehicle is a set discharge process; The method for determining the mapping relationship includes: The experimental lead-acid batteries used for the first time were subjected to cycle aging treatment; the experimental lead-acid batteries were of the same model as the lead-acid batteries inside the vehicle. During the cyclic aging process, whenever the experimental lead-acid battery reaches any of the multiple preset aging cycles, a discharge experiment is conducted on the lead-acid battery at any ambient temperature, and the discharge energy of the experimental lead-acid battery at different discharge durations is measured; the experimental discharge current during the discharge experiment is the same as the real-time current of the lead-acid battery during the preset discharge process, and the total duration of the discharge experiment is greater than or equal to the discharge duration of the lead-acid battery during the preset discharge process; Based on the discharge energy of the experimental lead-acid battery under different discharge durations, the discharge energy of the experimental lead-acid battery under different discharge durations is determined when the aging number of the experimental lead-acid battery is any set number. The mapping relationship is determined based on the discharge energy under different discharge durations at different ambient temperatures and different aging cycles.

[0010] In one possible implementation, prior to the cyclic aging process of the experimental lead-acid battery being put into use for the first time, the following is also included: The experimental lead-acid battery, which was put into use for the first time, was discharged at a constant current to the set test voltage according to the set test current, and the total discharge capacity of the experimental lead-acid battery was detected. If the total discharge capacity is greater than or equal to the rated capacity of the experimental lead-acid battery, then proceed to the step of performing a cycle aging treatment on the experimental lead-acid battery that is being used for the first time.

[0011] In one possible implementation, determining the remaining lifespan of the lead-acid battery inside the vehicle based on the actual number of aging cycles and a pre-stored upper limit for the number of aging cycles includes: The difference between the upper limit of the number of aging cycles and the actual number of aging cycles is determined as the remaining number of aging cycles; The ratio of the remaining number of aging cycles to the upper limit of the number of aging cycles is determined as the remaining lifespan of the lead-acid battery inside the vehicle.

[0012] In one possible implementation, detecting the actual discharge energy of the lead-acid battery when it discharges includes: When a car undergoes a system upgrade using over-the-air (OTA) technology, the actual discharge energy of the lead-acid battery inside the car is detected during the upgrade process.

[0013] Secondly, embodiments of the present invention provide a device for determining the remaining life of a lead-acid battery, comprising: The detection module is used to detect the actual discharge energy of the lead-acid battery when it is discharging inside the car; the actual discharge energy is determined based on the real-time voltage, real-time current and discharge duration of the lead-acid battery during the discharge process. A determination module is used to determine the remaining life of the lead-acid battery based on the actual discharge energy.

[0014] Thirdly, embodiments of the present invention provide an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method described in the first aspect or any possible implementation thereof.

[0015] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method described in the first aspect or any possible implementation thereof.

[0016] Fifthly, embodiments of the present invention provide a computer program product, including a computer program that, when executed by a processor, implements the method described in the first aspect or any possible implementation thereof.

[0017] In this embodiment of the invention, by obtaining the actual discharge energy of the lead-acid battery during the discharge process, the battery's work capacity during discharge can be reflected. The most fundamental performance degradation during the aging process of a lead-acid battery is the decline in its work capacity. Therefore, this embodiment of the invention can determine the remaining lifespan of the lead-acid battery based on its actual discharge energy. Compared to detection methods using static voltage or internal resistance, this embodiment determines the remaining lifespan through discharge energy, which is not affected by the battery's state of charge, eliminates the static blind zone, and effectively prevents misjudgment. Attached Figure Description

[0018] Figure 1 This is a flowchart illustrating the implementation of the method for determining the remaining life of a lead-acid battery provided in this embodiment of the invention. Figure 2 This is a flowchart illustrating the implementation of the mapping relationship determination method provided in this embodiment of the invention. Figure 3 This is a schematic diagram showing the mapping relationship between the number of aging cycles and the discharge energy when the ambient temperature is 25°C, the test discharge current is 15A, and the discharge time is 30 minutes, as provided in this embodiment of the invention. Figure 4 This is a schematic diagram of the device for determining the remaining life of a lead-acid battery provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0019] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] The main control system of an automobile primarily determines the remaining lifespan of a lead-acid battery by reading its static voltage and internal resistance. However, the inventors have discovered that when a lead-acid battery is fully charged, even if it has aged and its remaining lifespan is shortened, its static voltage and internal resistance do not change significantly compared to a non-aged lead-acid battery. In other words, using static voltage and internal resistance to determine remaining lifespan is prone to misjudgment.

[0021] To improve the accuracy of remaining lifespan and avoid misjudgments, in this embodiment of the invention, the actual discharge energy of a lead-acid battery is determined by detecting its real-time voltage, real-time current, and discharge duration during the discharge process. This actual discharge energy reflects the work capacity of the lead-acid battery during discharge. The magnitude of the work capacity effectively reflects the degree of aging of the lead-acid battery, thereby determining its remaining lifespan.

[0022] See Figure 1The document illustrates a flowchart of the method for determining the remaining life of a lead-acid battery according to an embodiment of the present invention, which is described in detail below: Step 101: When the lead-acid battery inside the car is discharging, detect the actual discharge energy of the lead-acid battery.

[0023] Most lead-acid batteries inside automobiles provide energy to various electronic components through shallow discharge to power the vehicle's normal operation. This invention allows for the detection of the actual discharge energy of a lead-acid battery during any shallow discharge process while the vehicle is in operation, in order to determine the remaining lifespan of the battery.

[0024] Alternatively, embodiments of the present invention may specifically perform shallow discharge operations on lead-acid batteries to detect the actual discharge energy of lead-acid batteries during the discharge process.

[0025] Shallow discharge, also known as shallow discharge, refers to a discharge method in which only a small portion of the battery's total capacity is released during a single discharge. Typically, a shallow discharge is defined as a discharge depth less than 20% of the battery's rated capacity. During a shallow discharge, the amount of discharge to the lead-acid battery is very small (less than or equal to 20% of the battery's rated capacity), which helps prevent aging or damage to the lead-acid battery. Furthermore, during a shallow discharge, the voltage changes of the lead-acid battery are more sensitive to its aging status, further improving the accuracy of remaining battery life estimation.

[0026] The higher the degree of aging of a lead-acid battery, the faster its voltage drops during discharge. In other words, voltage change is a very sensitive indicator of aging. And during shallow discharge, voltage changes are even more sensitive to the degree of aging.

[0027] For the sake of battery health and the accuracy of remaining life, embodiments of the present invention can detect the actual discharge energy during the shallow discharge process of a lead-acid battery in order to determine its remaining life.

[0028] In some embodiments, when a vehicle is upgraded using Over-The-Air (OTA) technology, the actual discharge energy of the lead-acid battery inside the vehicle during the system upgrade process can be detected to determine the remaining life of the lead-acid battery.

[0029] During vehicle operation, over-the-air (OTA) updates are frequently and irregularly performed. This OTA update process coincides with a shallow discharge of the lead-acid battery inside the vehicle. Therefore, this invention can detect the actual discharge energy during the OTA update process to determine the remaining battery life.

[0030] The OTA upgrade process itself is a standardized shallow discharge process. The embodiments of the present invention can automatically complete the detection of actual discharge energy during this process, thereby determining its remaining lifespan without user intervention or vehicle inspection at the station, realizing high-frequency and non-destructive lifespan assessment in the real operating environment of automobiles.

[0031] In the embodiments of the present invention, the actual discharge energy can be determined based on the real-time voltage, real-time current and discharge duration of the lead-acid battery during the discharge process.

[0032] In some embodiments, the real-time power can be determined first based on the real-time voltage and real-time current of the lead-acid battery during the discharge process; then, the actual discharge energy of the lead-acid battery inside the vehicle can be determined based on the real-time power and the discharge duration.

[0033] Here, the mathematical expression for the actual discharge energy can be expressed as: .in, Indicates the actual discharge energy. Indicates the discharge duration. Indicates real-time current. This indicates the real-time voltage.

[0034] Among them, discharge duration It can be the total discharge duration during the entire discharge process, or it can be the duration of the first part of the entire discharge process. The time period. In other words, the remaining lifetime can be determined based on the total actual discharge energy throughout the entire discharge process, or it can be determined based on the first part of the discharge process. The actual discharge energy during a given period determines the remaining lifetime.

[0035] The actual discharge energy mentioned above reflects the work capacity of a lead-acid battery during the discharge process. The most fundamental performance degradation during the aging process of a lead-acid battery is the decline in its work capacity. Therefore, this embodiment of the invention can use the actual discharge energy to reflect its degree of aging.

[0036] In essence, discharge energy includes both voltage drop and discharge capacity decay. Voltage drop reflects the increase in internal resistance, while discharge capacity decay reflects capacity retention. Both the increase in internal resistance and capacity retention reflect the degree of aging, making discharge energy a highly sensitive indicator of battery aging, thus effectively improving the accuracy of remaining battery life.

[0037] However, the inventors considered that the discharge state of lead-acid batteries inside automobiles is mostly a constant current shallow discharge state. In this state, the discharge amount (Ah) is a constant value, losing its ability to distinguish. At this time, the discharge energy can still reflect the degree of aging through voltage changes, thus ensuring the accuracy of the remaining lifespan.

[0038] Step 102: Determine the remaining lifespan of the lead-acid battery based on the actual discharge energy.

[0039] As described above, discharge energy can reflect the degree of aging. In this embodiment of the invention, a mapping relationship between discharge energy and the degree of aging can be established in advance, and then the remaining lifespan of the lead-acid battery can be calculated based on this mapping relationship and the degree of aging.

[0040] It should be noted that the discharge energy is affected not only by the degree of aging but also by the discharge duration and ambient temperature. Therefore, this embodiment of the invention can pre-determine the ambient temperature and discharge duration of the lead-acid battery, and based on the mapping relationship between discharge energy and the degree of aging, determine the degree of aging corresponding to the actual discharge energy, and then calculate the remaining lifespan. Here, the aging cycle can be used as an indicator to quantify the degree of aging of the lead-acid battery.

[0041] To avoid the influence of ambient temperature on the accuracy of remaining lifespan, embodiments of the present invention can obtain the actual ambient temperature of the lead-acid battery when detecting its actual discharge energy.

[0042] In some embodiments, based on the actual ambient temperature, the actual number of aging cycles corresponding to the lead-acid battery can be determined based on the actual ambient temperature, discharge duration, actual discharge energy, and a pre-stored mapping relationship; then, based on the actual number of aging cycles and the pre-stored upper limit of the number of aging cycles, the remaining lifespan of the lead-acid battery inside the vehicle is determined.

[0043] Here, the pre-stored mapping relationship includes: the correspondence between the discharge energy and the number of aging cycles of lead-acid batteries under different ambient temperatures and different discharge durations.

[0044] Considering that both ambient temperature and discharge duration affect discharge energy, embodiments of the present invention can determine the discharge energy corresponding to different aging cycles for each ambient temperature and each discharge duration, thereby obtaining the above mapping relationship.

[0045] In this embodiment of the invention, based on the actual ambient temperature and discharge duration corresponding to the actual discharge energy during the discharge process of the lead-acid battery, the discharge energy value closest to the actual discharge energy can be determined from the above-mentioned pre-stored mapping relationship, and the aging number corresponding to the discharge energy value can be determined as the actual aging number corresponding to the lead-acid battery.

[0046] In some embodiments, the difference between the upper limit of aging cycles and the actual number of aging cycles can be determined as the remaining number of aging cycles; then, the ratio of the remaining number of aging cycles to the upper limit of aging cycles can be determined as the remaining lifespan of the lead-acid battery inside the vehicle.

[0047] In this embodiment of the invention, a lead-acid battery of the same model as the lead-acid battery inside the car can be obtained in advance, and the lead-acid battery of the same model can be subjected to cyclic aging treatment until the life of the lead-acid battery of the same model ends. The number of aging times corresponding to the end of the life is obtained, and the number of aging times is used as the upper limit of the number of aging times.

[0048] To further improve the accuracy of the upper limit of aging cycles, the number of aging cycles corresponding to the end of the lifespan of multiple lead-acid batteries of the same model can be obtained, and the average value of each aging cycle can be used as the final upper limit of aging cycles.

[0049] For example, the maximum number of aging cycles can be 150. The actual discharge energy of a lead-acid battery is closest to the discharge energy corresponding to 120 aging cycles, so the actual number of aging cycles can be determined as 120. The remaining lifespan can be (150-120) / 150 = 20%.

[0050] This invention utilizes the inherent characteristic that lead-acid batteries are always in a discharged state during automotive system upgrades. By detecting their actual discharge energy, a mapping relationship is established between this energy and the remaining battery life, thereby achieving an accurate assessment of the remaining life. The core of this method lies in the fact that actual discharge energy is a direct reflection of the battery's overall performance under load conditions, and can sensitively reflect its aging degree, such as irreversible changes like the degradation of active materials and an increase in internal resistance.

[0051] Compared to traditional methods relying on static voltage or internal resistance measurements, this invention's embodiment, based on dynamic discharge energy assessment, fundamentally overcomes the interference of real-time battery state of charge (SOC) on the detection results. Even when the static voltage and internal resistance are normal at full charge, this method can still accurately identify performance degradation caused by a decrease in discharge energy, thereby significantly improving the reliability of remaining life prediction and effectively avoiding misjudgments.

[0052] The following section will elaborate on the methods for determining the mapping relationship.

[0053] The present invention mainly simulates the discharge process of a lead-acid battery inside a car by subjecting it to cyclic aging and discharging it at different aging levels. The discharge energy during the discharge process is then detected to determine the correlation between the discharge energy and the number of aging cycles.

[0054] In some embodiments, the discharge process of the lead-acid battery inside the vehicle is a set discharge process. It is understood that the operation of the lead-acid battery inside the vehicle may include multiple different discharge processes. Embodiments of the present invention can determine a mapping relationship based on one of the discharge processes (i.e., the set discharge process), so that the actual discharge energy can be detected based on this set discharge process during subsequent vehicle operation, thereby determining the remaining lifespan.

[0055] Specifically, see Figure 2 Methods for determining mapping relationships include: Step 201: Perform cycle aging treatment on the experimental lead-acid batteries that are put into use for the first time.

[0056] Understandably, the experimental lead-acid battery is the same model as the lead-acid battery inside the car to ensure the accuracy of the mapping relationship.

[0057] In this embodiment of the invention, the experimental lead-acid battery can be charged and discharged. Each charge and discharge operation is completed, which constitutes one aging process.

[0058] Specifically, the experimental lead-acid battery can be pre-charged to a fully charged state. Then, the fully charged battery is placed in a temperature-controlled chamber at a high temperature (e.g., 40°C) to allow the ambient temperature to reach the high-temperature state. Under high temperature (e.g., 40°C), constant current discharge is performed until the set discharge time (e.g., 2 hours) is reached, or until the real-time voltage of the experimental lead-acid battery falls below a set voltage threshold (e.g., 10V), completing the discharge operation. Here, the current value during constant current discharge can be 5I. 20 I 20 =C20 / 20h. C20 represents the rated capacity at the 20-hour rate.

[0059] Next, the experimental lead-acid battery was subjected to constant voltage and current-limited charging. The voltage value during charging can be the rated charging voltage of the experimental lead-acid battery. For example, the charging voltage of a valve-regulated sealed lead-acid battery (Absorbent Glass Mat Battery, AGM) is 14.8V, and the charging voltage of an enhanced flooded battery (EFB) is 15.6V. The current-limiting value during charging is 5I. 20 Charging time is 5 hours.

[0060] In this embodiment of the invention, each execution of the above-described charge-discharge operation completes one aging process. By cyclically repeating the above-described charge-discharge operation, cyclic aging of the experimental lead-acid battery can be achieved, thereby aging the experimental lead-acid battery to different degrees.

[0061] Before performing cyclic aging treatment on the experimental lead-acid battery in the embodiments of the present invention, the performance of the experimental lead-acid battery can be pre-detected to determine whether it is qualified. On the basis of determining its qualified performance, subsequent cyclic aging treatment is then carried out to avoid affecting the accuracy of the mapping relationship due to unqualified performance of the experimental lead-acid battery.

[0062] In some embodiments, the experimental lead-acid battery put into use for the first time can be subjected to constant current discharge to a set test voltage according to a set test current, and the total discharge capacity of the experimental lead-acid battery is detected. If the total discharge capacity is greater than or equal to the rated capacity of the experimental lead-acid battery, then jump to execute the step of performing cyclic aging treatment on the experimental lead-acid battery put into use for the first time.

[0063] Here, the set test current can be I 20 . The set test voltage can be 10.5V. Under this set test current and set test voltage, if the total discharge capacity is greater than or equal to the rated capacity, it is determined that the performance of the experimental lead-acid battery is qualified, and subsequent cyclic aging work can be carried out. If the total discharge capacity is less than the rated capacity, it is determined that the performance of the experimental lead-acid battery is unqualified, and a new experimental lead-acid battery needs to be replaced.

[0064] Among them, the process of detecting whether the performance of the experimental lead-acid battery is qualified can be carried out at an ambient temperature of 25°C.

[0065] Step 202, during the cyclic aging treatment, whenever the aging times of the experimental lead-acid battery reach any one of multiple set times, a discharge experiment is carried out on the lead-acid battery at any ambient temperature, and the discharge energy of the experimental lead-acid battery at different discharge durations is detected.

[0066] Here, the experimental discharge current during the discharge experiment is the same as the real-time current of the lead-acid battery during the set discharge process, and the total duration of the discharge experiment process is greater than or equal to the discharge duration of the lead-acid battery during the set discharge process.

[0067] In the embodiments of the present invention, multiple set times can be preset, for example, 20 times, 40 times, 70 times, 120 times, etc.

[0068] During the cyclic aging process of the experimental lead-acid battery, whenever the aging times of the experimental lead-acid battery reach any one of the set times, a discharge experiment can be carried out at any ambient temperature to determine the discharge energy of the experimental lead-acid battery at different discharge durations at this ambient temperature until the life of the experimental lead-acid battery expires.

[0069] Here, the ambient temperature can include multiple values, such as -18℃, 0℃, 25℃, 75℃, etc. In this embodiment of the invention, step 202 can be performed for each ambient temperature to establish a mapping relationship at that ambient temperature.

[0070] The specific operational procedures for conducting discharge experiments at any ambient temperature may include: The experimental lead-acid battery was fully charged and placed at any of the aforementioned ambient temperatures for several hours (24 hours) to allow its temperature to reach that ambient temperature. Next, the battery was discharged using the experimental discharge current, and the discharge energy was measured during the discharge process.

[0071] To ensure the accuracy of the mapping relationship, the experimental discharge current in this embodiment of the invention can be the same as the real-time current of the lead-acid battery in the vehicle during the set discharge process. Furthermore, during each discharge experiment, this embodiment of the invention can detect the discharge energy corresponding to different discharge durations throughout the entire discharge experiment until the experiment ends. The total duration of the discharge experiment is greater than or equal to the discharge duration of the lead-acid battery during the set discharge process, so that when assessing the remaining life of the lead-acid battery, the discharge duration during the set discharge process can be directly used as the basis for evaluation. The actual discharge energy corresponds to the number of aging cycles.

[0072] For example, this embodiment of the invention detects the actual discharge energy of a vehicle during the OTA (Over-The-Air) upgrade process, thereby determining its remaining lifespan. Accordingly, when conducting a discharge experiment, the experimental discharge current and the total duration of the discharge experiment can be determined based on the real-time current and discharge duration of the OTA upgrade process. For instance, during an OTA upgrade, the discharge process of the lead-acid battery inside the vehicle is typically a constant current discharge process, with a real-time current of 15A and a total discharge duration of 30 minutes. Accordingly, when conducting a discharge experiment, the experimental discharge current can be kept constant at 15A. The total discharge experiment duration can be greater than or equal to 30 minutes, so that the discharge energy corresponding to different discharge durations during the OTA upgrade process at the current aging cycle can be determined through the discharge experiment. This establishes a mapping relationship.

[0073] Step 203: Based on the discharge energy of the experimental lead-acid battery under different discharge durations, determine the discharge energy of the experimental lead-acid battery under different discharge durations when the aging number of the battery is set to any number.

[0074] Here, the discharge energy of the experimental lead-acid battery at different discharge durations can be directly determined as the discharge energy at different discharge durations when the aging number of the experimental lead-acid battery is determined to be any set number.

[0075] To ensure the accuracy of the mapping relationship, the number of experimental lead-acid batteries in this embodiment of the invention can be greater than 1, and the average value of the discharge energy of each experimental lead-acid battery at each discharge duration is determined as the discharge energy at that discharge duration, thereby finally determining the discharge energy at different discharge durations when the number of aging cycles is any of the above-mentioned set cycles.

[0076] Step 204: Determine the mapping relationship based on the discharge energy under different discharge durations when the aging number is different and the ambient temperature is different.

[0077] For each ambient temperature, in the process of cyclic aging treatment, the embodiments of the present invention can determine the discharge energy under different discharge durations when the number of aging cycles is different and the number of aging cycles is different, thereby obtaining the mapping relationship under that ambient temperature.

[0078] In this embodiment of the invention, after confirming the performance of the experimental lead-acid battery is qualified and before performing cycle aging treatment, a discharge test is conducted on the experimental lead-acid battery to determine the discharge energy corresponding to 0 aging cycles. Then, the experimental lead-acid battery undergoes cycle aging treatment until its lifespan ends, thereby establishing the aforementioned mapping relationship throughout the entire life cycle of the experimental lead-acid battery.

[0079] The following section uses the 6-QF-50 lead-acid battery as an example to describe the specific process for determining the mapping relationship during the discharge process of an OTA upgrade: 1. Place 5 experimental lead-acid batteries in a temperature-controlled chamber, set the temperature to 25°C, and after 16 hours, adjust each experimental lead-acid battery to a fully charged state, using I... 20 A constant current of 50 / 20 = 2.5A was applied to each experimental lead-acid battery to discharge it to 10.5 volts, and the total discharge capacity of 53Ah was recorded. This total discharge capacity exceeded its rated capacity, confirming that the experimental lead-acid batteries met performance standards.

[0080] 2. Charge all five experimental lead-acid batteries to full charge and place them at the experimental temperature for 24 hours (the experimental temperature can be -18℃, 0℃, 25℃, or 75℃). Then discharge them at a constant current of 15A for 30 minutes. During the discharge process, the battery voltage will decrease, and the discharge energy... This is recorded as 90Wh of energy released in the 0th cycle.

[0081] 3. Adjust each experimental lead-acid battery to a fully charged state, set the temperature of the temperature control chamber to 40℃, and let the batteries stand in the temperature control chamber for 24 hours.

[0082] 4. Discharge at a constant discharge current of 12.5A for 2 hours in an environment of 40℃, and then charge at a constant voltage of 14.8V and a current-limited of 12.5A for 5 hours.

[0083] 5. The five experimental batteries were cycled 20, 40, 70, 120 and 240 times respectively in step 4. The batteries were fully charged and placed at the experimental temperature for 24 hours. Then they were discharged at a constant current of 15A for 30 minutes. The discharge energies were calculated to be 87Wh, 80Wh, 68Wh, 50Wh and 20Wh respectively.

[0084] 6. Plot the curves of aging cycles versus discharge energy based on the energy released at cycles 0, 20, 40, 70, 120, and 240.

[0085] When the ambient temperature is 25 degrees Celsius, the test discharge current is 15A, and the discharge time is 30 minutes, the mapping relationship between the number of aging cycles and the discharge energy can be as follows: Figure 3 As shown. Subsequently, the experimental temperatures can be set to -18℃, 0℃, and 75℃, and the above steps can be repeated to calculate the discharge energy corresponding to a discharge duration of 30 minutes during a car OTA upgrade at -18℃, 0℃, and 75℃, thereby establishing a mapping relationship. For example, the mapping relationship can be shown in the table below:

[0086] 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 the present invention.

[0087] The following are device embodiments of the present invention. For details not described in detail, please refer to the corresponding method embodiments described above.

[0088] Figure 4 A schematic diagram of the device for determining the remaining life of a lead-acid battery according to an embodiment of the present invention is shown. For ease of explanation, only the parts related to the embodiment of the present invention are shown, and are described in detail below: like Figure 4 As shown, the device 4 for determining the remaining life of a lead-acid battery includes a detection module 41 and a determination module 42.

[0089] Detection module 41 is used to detect the actual discharge energy of the lead-acid battery when the lead-acid battery inside the car is discharging; the actual discharge energy is determined based on the real-time voltage, real-time current and discharge duration of the lead-acid battery during the discharge process. Module 42 is used to determine the remaining life of a lead-acid battery based on the actual discharge energy.

[0090] In one possible implementation, the detection module 41 is specifically used for: The real-time power is determined based on the real-time voltage and real-time current of the lead-acid battery during discharge. Based on real-time power and discharge duration, the actual discharge energy of the lead-acid battery inside the vehicle is determined.

[0091] In one possible implementation, the detection module 41 is further configured to: When testing the actual discharge energy of a lead-acid battery, the actual ambient temperature of the lead-acid battery is obtained. Module 42 is specifically used for: Based on the actual ambient temperature, discharge duration, actual discharge energy, and pre-stored mapping relationships, the actual number of aging cycles for lead-acid batteries is determined. The pre-stored mapping relationships include the correspondence between the discharge energy and the number of aging cycles of lead-acid batteries under different ambient temperatures and discharge durations. The remaining lifespan of the lead-acid battery inside the car is determined based on the actual number of aging cycles and the pre-stored upper limit of the number of aging cycles.

[0092] In one possible implementation, the discharge process of the lead-acid battery inside the car is a set discharge process; Methods for determining mapping relationships include: The experimental lead-acid batteries, which were put into use for the first time, underwent a cycle aging process; the experimental lead-acid batteries were of the same model as the lead-acid batteries inside the automobile. During the cyclic aging process, whenever the experimental lead-acid battery reaches any of the multiple set numbers of aging, a discharge experiment is conducted on the lead-acid battery at any ambient temperature, and the discharge energy of the experimental lead-acid battery at different discharge durations is detected; the experimental discharge current during the discharge experiment is the same as the real-time current of the lead-acid battery during the set discharge process, and the total duration of the discharge experiment is greater than or equal to the discharge duration of the lead-acid battery during the set discharge process; Based on the discharge energy of the experimental lead-acid battery under different discharge durations, the discharge energy of the experimental lead-acid battery under different discharge durations is determined when the aging number of the experimental lead-acid battery is set to any number. Based on the discharge energy under different discharge durations at different ambient temperatures and different aging cycles, a mapping relationship is determined.

[0093] In one possible implementation, prior to the cyclic aging process of the experimental lead-acid battery being put into use for the first time, the following is also included: The experimental lead-acid battery, which was being used for the first time, was discharged at a constant current to the set test voltage according to the set test current, and the total discharge capacity of the experimental lead-acid battery was measured. If the total discharge capacity is greater than or equal to the rated capacity of the experimental lead-acid battery, then proceed to the step of performing cycle aging treatment on the experimental lead-acid battery that is being put into use for the first time.

[0094] In one possible implementation, module 42 is specifically used for: The difference between the upper limit of aging times and the actual number of aging times is determined as the remaining number of aging times; The ratio of the remaining number of aging cycles to the maximum number of aging cycles is determined as the remaining lifespan of the lead-acid battery inside the car.

[0095] In one possible implementation, the detection module 41 is specifically used for: When a car undergoes a system upgrade using over-the-air (OTA) technology, the actual discharge energy of the lead-acid battery inside the car is detected during the upgrade process.

[0096] This device embodiment can be used to implement the above method embodiment, and its technical principle and implementation effect are the same as those of the above method embodiment, so they will not be repeated here.

[0097] Figure 5 This is a schematic diagram of an electronic device provided in an embodiment of the present invention. For example... Figure 5 As shown, the electronic device 5 of this embodiment includes a processor 50 and a memory 51. The memory 51 stores a computer program 52. When the processor 50 executes the computer program 52, it implements the steps in the various method embodiments described above. Alternatively, when the processor 50 executes the computer program 52, it implements the functions of each module / unit in the various device embodiments described above.

[0098] For example, computer program 52 may be divided into one or more modules / units, which are stored in memory 51 and executed by processor 50 to complete the present invention. The one or more modules / units may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of computer program 52 in electronic device 5.

[0099] Electronic device 5 may include, but is not limited to, processor 50 and memory 51. Those skilled in the art will understand that... Figure 5 This is merely an example of electronic device 5 and does not constitute a limitation on electronic device 5. It may include more or fewer components than shown, or combine certain components, or different components. For example, electronic device 5 may also include input / output devices, network access devices, buses, etc.

[0100] The processor 50 can 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. The general-purpose processor can be a microprocessor or any conventional processor.

[0101] The memory 51 can be an internal storage unit of the electronic device 5, such as a hard disk or RAM. The memory 51 can also be an external storage device of the electronic device 5, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card. Furthermore, the memory 51 can include both internal and external storage units of the electronic device 5. The memory 51 is used to store the computer program 52 and other programs and data required by the electronic device 5. The memory 51 can also be used to temporarily store data that has been output or will be output.

[0102] For the sake of simplicity and clarity, only the above-described functional modules / units are used as examples. In practical applications, the functions described above can be assigned to different functional modules / units as needed. These modules / units can be implemented in hardware, software, or a combination of both.

[0103] This invention also provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the methods described in the above-described method embodiments.

[0104] This invention also provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements the methods described in the above-described method embodiments.

[0105] Computer programs include computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. Computer-readable media can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0106] In the above embodiments, the descriptions of each embodiment have their own emphasis. Parts not detailed or described in a particular embodiment can be referred to in the relevant descriptions of other embodiments. Unless otherwise specified or in conflict with logic, the terminology and / or descriptions between different embodiments are consistent and can be referenced interchangeably. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0107] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention 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 the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for determining the remaining life of a lead-acid battery, characterized in that, include: When the lead-acid battery inside the car discharges, the actual discharge energy of the lead-acid battery is detected. The actual discharge energy is determined based on the real-time voltage, real-time current and discharge duration of the lead-acid battery during the discharge process; The remaining lifespan of the lead-acid battery is determined based on the actual discharge energy.

2. The method for determining the remaining life of a lead-acid battery according to claim 1, characterized in that, The detection of the actual discharge energy of the lead-acid battery includes: The real-time power is determined based on the real-time voltage and real-time current of the lead-acid battery during the discharge process; Based on the real-time power and the discharge duration, the actual discharge energy of the lead-acid battery inside the vehicle is determined.

3. The method for determining the remaining life of a lead-acid battery according to claim 1 or 2, characterized in that, The method further includes: When detecting the actual discharge energy of the lead-acid battery, the actual ambient temperature of the lead-acid battery is obtained. Determining the remaining lifespan of the lead-acid battery based on the actual discharge energy includes: Based on the actual ambient temperature, the discharge duration, the actual discharge energy, and the pre-stored mapping relationship, the actual number of aging cycles corresponding to the lead-acid battery is determined; the pre-stored mapping relationship includes: the correspondence between the discharge energy and the number of aging cycles of the lead-acid battery under different ambient temperatures and different discharge durations. The remaining lifespan of the lead-acid battery inside the vehicle is determined based on the actual number of aging cycles and the pre-stored upper limit of the number of aging cycles.

4. The method for determining the remaining life of a lead-acid battery according to claim 3, characterized in that, The process of discharging the lead-acid battery inside the car is called the set discharge process. The method for determining the mapping relationship includes: The experimental lead-acid batteries used for the first time were subjected to cycle aging treatment; the experimental lead-acid batteries were of the same model as the lead-acid batteries inside the vehicle. During the cyclic aging process, whenever the experimental lead-acid battery reaches any of the multiple preset aging cycles, a discharge experiment is conducted on the lead-acid battery at any ambient temperature, and the discharge energy of the experimental lead-acid battery at different discharge durations is measured; the experimental discharge current during the discharge experiment is the same as the real-time current of the lead-acid battery during the preset discharge process, and the total duration of the discharge experiment is greater than or equal to the discharge duration of the lead-acid battery during the preset discharge process; Based on the discharge energy of the experimental lead-acid battery under different discharge durations, the discharge energy of the experimental lead-acid battery under different discharge durations is determined when the aging number of the experimental lead-acid battery is any set number. The mapping relationship is determined based on the discharge energy under different discharge durations at different ambient temperatures and different aging cycles.

5. The method for determining the remaining life of a lead-acid battery according to claim 3, characterized in that, Before subjecting experimental lead-acid batteries to cycle aging treatment for the first time, the following steps are also included: The experimental lead-acid battery, which was put into use for the first time, was discharged at a constant current to the set test voltage according to the set test current, and the total discharge capacity of the experimental lead-acid battery was detected. If the total discharge capacity is greater than or equal to the rated capacity of the experimental lead-acid battery, then proceed to the step of performing a cycle aging treatment on the experimental lead-acid battery that is being used for the first time.

6. The method for determining the remaining life of a lead-acid battery according to claim 1 or 2, characterized in that, Determining the remaining lifespan of the lead-acid battery inside the vehicle based on the actual number of aging cycles and the pre-stored upper limit for the number of aging cycles includes: The difference between the upper limit of the number of aging cycles and the actual number of aging cycles is determined as the remaining number of aging cycles; The ratio of the remaining number of aging cycles to the upper limit of the number of aging cycles is determined as the remaining lifespan of the lead-acid battery inside the vehicle.

7. The method for determining the remaining life of a lead-acid battery according to claim 1 or 2, characterized in that, When the lead-acid battery inside the vehicle discharges, detecting the actual discharge energy of the lead-acid battery includes: When a car undergoes a system upgrade using over-the-air (OTA) technology, the actual discharge energy of the lead-acid battery inside the car is detected during the upgrade process.

8. A device for determining the remaining life of a lead-acid battery, characterized in that, include: The detection module is used to detect the actual discharge energy of the lead-acid battery when the lead-acid battery inside the car is discharging. The actual discharge energy is determined based on the real-time voltage, real-time current and discharge duration of the lead-acid battery during the discharge process; A determination module is used to determine the remaining life of the lead-acid battery based on the actual discharge energy.

9. An electronic device, characterized in that, It includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method as described in any one of claims 1 to 7.

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