Retired power battery screening method and device, electronic equipment and computer storage medium

Abstract

The invention relates to an out-of-service power battery screening method and device, electronic equipment and a computer storage medium, and belongs to the technical field of power batteries. The out-of-service power battery screening method comprises the steps that appearance images of out-of-service power batteries to be screened are obtained; the to-be-screened decommissioned power batteries with the appearance integrity not meeting the preset integrity requirement are removed, and first candidate decommissioned power batteries are obtained; measuring open-circuit voltage and internal resistance of the first candidate decommissioned power battery, and rejecting the first candidate decommissioned power battery with the open-circuit voltage lower than a preset open-circuit voltage threshold and / or the internal resistance greater than a preset internal resistance threshold to obtain a second candidate decommissioned power battery; and obtaining charging and discharging data of the second candidate retired power battery, and determining the second candidate retired power battery with the charging and discharging data meeting a preset charging and discharging requirement as a target retired power battery. According to the method, echelon utilization screening of the retired power batteries can be completed within a short time, and the screening cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular, to a method, device, electronic device and computer storage medium for screening retired power batteries. Background Art

[0002] With the rapid advancement of the new energy vehicle industry, the wave of retired power batteries has quietly arrived. After the service life of a large number of lithium iron phosphate batteries used in new energy vehicles expires, due to their excellent cycle life and relatively low metal value, they have great potential in the field of cascade utilization, thus giving rise to the development of the power battery recycling industry.

[0003] Power battery recycling technology aims to recycle power batteries with reusable value. However, there are a wide variety of power batteries, and the number of power batteries used in new energy vehicles is huge. The detection of each power battery will directly affect the recycling value of the power battery. Power batteries with different recycling values can be applied to different levels of usage scenarios, such as secondary markets like electric two-wheelers, low-speed electric vehicles, portable energy storage devices, and home energy storage systems. Therefore, it is necessary to accurately identify the remaining useful value of power batteries. However, the existing technology cannot accurately judge the cascade utilization value of power batteries, resulting in the inability to carry out reasonable cascade utilization of power batteries and causing energy waste.

[0004] It can be seen that the existing technology cannot carry out reasonable cascade utilization of power batteries, resulting in energy waste. Summary of the Invention

[0005] In view of this, it is necessary to provide a method, device, electronic device and computer storage medium for screening retired power batteries to solve the problem that the existing technology cannot carry out reasonable cascade utilization of power batteries, resulting in energy waste.

[0006] To solve the above problems, the present invention provides a method for screening retired power batteries, including:

[0007] Obtaining an appearance image of the retired power battery to be screened, determining the appearance integrity of the retired power battery to be screened based on the appearance image, and removing the retired power battery to be screened whose appearance integrity does not meet the preset integrity requirement to obtain a first candidate retired power battery;

[0008] Measuring the open-circuit voltage and internal resistance of the first candidate retired power battery, and removing the first candidate retired power battery whose open-circuit voltage is lower than the preset open-circuit voltage threshold and / or whose internal resistance is greater than the preset internal resistance threshold to obtain a second candidate retired power battery;

[0009] Obtain the charge-discharge data of the second candidate retired power battery, and determine the second candidate retired power battery whose charge-discharge data meets the preset charge-discharge requirements as the target retired power battery.

[0010] In a possible implementation manner, determining the appearance integrity of the to-be-screened retired power battery based on the appearance image, and removing the to-be-screened retired power battery whose appearance integrity does not meet the preset integrity requirements to obtain the first candidate retired power battery, includes:

[0011] Use image recognition technology to determine the size, shape, and defects on the surface of the to-be-screened retired power battery based on the appearance image;

[0012] Based on the size, shape, and defects on the surface of the to-be-screened retired power battery, determine the to-be-screened retired power battery with appearance defects, and remove the to-be-screened retired power battery with appearance defects to obtain the first candidate retired power battery.

[0013] In a possible implementation manner, measuring the open-circuit voltage and internal resistance of the first candidate retired power battery, and removing the first candidate retired power battery whose open-circuit voltage is lower than the preset open-circuit voltage threshold and / or whose internal resistance is greater than the preset internal resistance threshold, includes:

[0014] Measure the first open-circuit voltage of the first candidate retired power battery, and remove the first candidate retired power battery whose first open-circuit voltage is less than 2.6V;

[0015] Measure the internal resistance of the first candidate retired power battery, and remove the first candidate retired power battery whose internal resistance exceeds the standard internal resistance of the first candidate retired power battery by a preset ratio.

[0016] In a possible implementation manner, the obtaining the charge-discharge data of the second candidate retired power battery includes:

[0017] Perform charge-discharge tests on the second candidate retired power battery in a preset charging environment, and obtain the voltage curve of the second candidate retired power battery during the charge-discharge tests;

[0018] Intercept the average voltage curve within a preset voltage range in the voltage curve, and determine the second candidate retired power battery within the preset range of the average voltage curve as the third candidate retired power battery;

[0019] After the third candidate retired power battery is subjected to a static treatment, measure the second open-circuit voltage, and determine the third candidate retired power battery with the second open-circuit voltage within the preset voltage range as the target retired power battery.

[0020] In a possible implementation manner, performing charge and discharge tests on the second candidate retired power battery in a preset charging environment, and obtaining a voltage curve of the second candidate retired power battery in the charge and discharge tests includes:

[0021] Obtain a charging voltage curve and a discharging voltage curve of the second candidate retired power battery at a preset ambient temperature and a preset charging voltage.

[0022] In a possible implementation manner, intercepting an average voltage curve within a preset voltage range of the voltage curve, and determining a second candidate retired power battery with the voltage curve within a preset range of the average voltage curve as the third candidate retired power battery includes:

[0023] Taking the average value of the charging voltage curves of each second candidate retired power battery within a preset charging voltage range as the average charging voltage curve, and taking the average value of the discharging voltage curves of each second candidate retired power battery within a preset discharging voltage range as the average discharging voltage curve;

[0024] Determine a second candidate retired power battery with a charging voltage within the average charging voltage range and a discharging voltage within the average discharging voltage range as the third candidate retired power battery.

[0025] In a possible implementation manner, determining the third candidate retired power battery with the second open-circuit voltage within the preset voltage range as the target retired power battery includes:

[0026] Calculate the average open-circuit voltage of the second open-circuit voltages of each second candidate retired power battery;

[0027] Eliminate a second candidate retired power battery whose second open-circuit voltage is less than the average open-circuit voltage by more than 20 millivolts to obtain the target retired power battery.

[0028] The present invention further provides a retired power battery screening device, including:

[0029] A first screening module, configured to obtain an appearance image of a to-be-screened retired power battery, determine the appearance integrity of the to-be-screened retired power battery based on the appearance image, and eliminate the to-be-screened retired power battery whose appearance integrity does not meet the preset integrity requirement to obtain a first candidate retired power battery;

[0030] A second screening module, configured to measure the open-circuit voltage and internal resistance of the first candidate retired power battery, and eliminate the first candidate retired power battery whose open-circuit voltage is lower than a preset open-circuit voltage threshold and / or whose internal resistance is greater than a preset internal resistance threshold, so as to obtain a second candidate retired power battery;

[0031] A third screening module, configured to obtain charge and discharge data of the second candidate retired power battery, and determine the second candidate retired power battery whose charge and discharge data meet the preset charge and discharge requirements as the target retired power battery.

[0032] The present invention also provides an electronic device, including a memory and a processor, wherein,

[0033] The memory is configured to store a program;

[0034] The processor is coupled to the memory and configured to execute the program stored in the memory to implement the steps in the retired power battery screening method described in any one of the above embodiments.

[0035] The present invention also provides a computer-readable storage medium, configured to store a computer-readable program or instruction, and when the program or instruction is executed by a processor, it can implement the steps in the retired power battery screening method described in any one of the above embodiments.

[0036] The beneficial effects of the present invention are as follows: The retired power battery screening method provided by the present invention obtains the appearance image of the to-be-screened retired power battery, determines the appearance integrity of the to-be-screened retired power battery based on the appearance image, and eliminates the to-be-screened retired power battery whose appearance integrity does not meet the preset integrity requirements to obtain a first candidate retired power battery; measures the open-circuit voltage and internal resistance of the first candidate retired power battery, and eliminates the first candidate retired power battery whose open-circuit voltage is lower than a preset open-circuit voltage threshold and / or whose internal resistance is greater than a preset internal resistance threshold to obtain a second candidate retired power battery; obtains the charge and discharge data of the second candidate retired power battery, and determines the second candidate retired power battery whose charge and discharge data meet the preset charge and discharge requirements as the target retired power battery. It can complete the screening for the cascade utilization of retired power batteries in a short time, with low screening cost, avoiding the risks brought by disassembling power batteries, and being able to be compatible with the screening of power batteries with different performances. Through a screening process that combines static and dynamic aspects comprehensively, it can further obtain battery performance parameter data, sort batteries according to batches, make the battery consistency better, the later operation time longer, and the safety more reliable. Description of the Drawings

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0038] Figure 1 It is a schematic flow chart of a method for screening retired power batteries provided by an embodiment of the present invention;

[0039] Figure 2 It is a schematic flow chart of a method for screening the first candidate retired power batteries provided by an embodiment of the present invention;

[0040] Figure 3 It is a schematic flow chart of a method for implementing S102 provided by an embodiment of the present invention;

[0041] Figure 4 It is a schematic flow chart of a method for obtaining charge and discharge data provided by an embodiment of the present invention;

[0042] Figure 5 It is a schematic flow chart of a method for screening the third candidate retired power batteries provided by an embodiment of the present invention;

[0043] Figure 6 It is a schematic flow chart of a static screening method provided by an embodiment of the present invention;

[0044] Figure 7 It is a schematic structural diagram of a device for screening retired power batteries provided by an embodiment of the present invention;

[0045] Figure 8 It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. Specific embodiments

[0046] The following will specifically describe the preferred embodiments of the present invention in conjunction with the drawings. Among them, the drawings form a part of the present invention and are used together with the embodiments of the present invention to explain the principle of the present invention, rather than to limit the scope of the present invention.

[0047] In the description of the embodiments of the present invention, unless otherwise specified, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships, for example: A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone.

[0048] In the embodiments of the present invention, descriptions such as "first" and "second" are only for descriptive purposes, and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, technical features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0049] Reference to "embodiment" in this document means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0050] A specific embodiment of the present invention, as Figure 1 shown, discloses a method for screening retired power batteries, including:

[0051] S101, obtaining an appearance image of the retired power battery to be screened, determining the appearance integrity of the retired power battery to be screened based on the appearance image, and removing the retired power battery to be screened whose appearance integrity does not meet the preset integrity requirement to obtain the first candidate retired power battery;

[0052] S102, measuring the open-circuit voltage and internal resistance of the first candidate retired power battery, and removing the first candidate retired power battery whose open-circuit voltage is lower than the preset open-circuit voltage threshold and / or whose internal resistance is greater than the preset internal resistance threshold to obtain the second candidate retired power battery;

[0053] S103, obtaining the charge and discharge data of the second candidate retired power battery, and determining the target retired power battery for the second candidate retired power battery whose charge and discharge data meet the preset charge and discharge requirements.

[0054] In the embodiments of the present invention, a retired power battery refers to a power battery that has reached a preset service life in a new energy vehicle and can no longer provide good power output for the new energy vehicle. There may be problems such as unstable output voltage, insufficient output voltage, and poor battery capacity. For different retired power batteries, their performances are also different. Therefore, it is necessary to screen the retired power batteries to determine the cascade utilization scenarios of the retired power batteries. The cascade utilization scenario refers to an application scenario with different requirements for power batteries. For example, the application scenarios of electric two-wheelers and household backup power supplies are different, and the performance requirements for power batteries are also different. Therefore, the appropriate usage scenarios of each retired power battery can be determined through the retired power battery screening method provided by the present invention.

[0055] In the embodiments of the present invention, it is necessary to first screen the appearance of retired power batteries, and eliminate the retired power batteries with appearance defects. Specifically, the retired power batteries with appearance defects can be eliminated by manual visual inspection, or the appearance images of the retired power batteries can be collected by a high-precision image acquisition device, and then the appearance integrity of the retired power battery can be determined based on the appearance image of the retired power battery, and the retired power batteries with appearance integrity not meeting the preset integrity requirements are eliminated.

[0056] Furthermore, after eliminating some of the retired power batteries with appearance defects, it is necessary to detect the open-circuit voltage and internal resistance of the retired power batteries, and eliminate the retired power batteries with open-circuit voltage and / or internal resistance not meeting the requirements again.

[0057] Furthermore, for the retired power batteries remaining after the above two eliminations, charge and discharge tests are performed on them to obtain charge and discharge test data, and a final elimination is performed based on the charge and discharge test data to obtain the available retired power batteries.

[0058] The screening processes in the above three stages will be described in detail in the follow-up of the present invention.

[0059] The method for screening retired power batteries provided by the present invention can complete the screening for the cascade utilization of retired power batteries in a short time, with low screening costs, avoiding the risks brought by disassembling power batteries, and being able to be compatible with the screening of power batteries with different performances. Through a screening process that comprehensively combines static and dynamic aspects, battery performance parameter data can be further obtained, and batteries can be sorted according to batches, making the battery consistency better, the later operation time longer, and the safety more reliable.

[0060] As a possible implementation manner of the present invention, in this implementation manner, as Figure 2 shown, to determine the appearance integrity of the retired power battery to be screened based on the appearance image, and to determine the appearance integrity of the retired power battery to be screened based on the appearance image, and eliminate the retired power batteries to be screened with appearance integrity not meeting the preset integrity requirements to obtain the first candidate retired power batteries, including:

[0061] S201, using image recognition technology to determine the size, shape, and defects on the surface of the retired power battery to be screened based on the appearance image;

[0062] S202, determine the retired power batteries to be screened with appearance defects based on the size, shape, and defects on the surface of the retired power battery to be screened, and eliminate the retired power batteries to be screened with appearance defects to obtain the first candidate retired power batteries.

[0063] In the embodiments of the present invention, the appearance defects include, but are not limited to, any depression or deformation at any position on the outer surface of the battery, electrolyte leakage at the damaged pressure relief valve on the battery terminal surface or at other damaged parts of the battery, corrosion of the battery housing or terminal, pressure relief due to rupture of the pressure relief valve, and the expansion degree of the battery exceeding 15% of the battery factory thickness specification given in the battery specification. When detecting the appearance defects of retired power batteries, image recognition technology can be used to recognize the appearance images of retired power batteries, and then detect minor defects, such as minor scratches, depressions, protrusions, metal wires, short - circuit points, etc.; recognize defects such as oil stains, rust, and poor inkjet printing on the battery surface; and detect whether the size, shape, and appearance of the battery meet the specified standards. Retired power batteries with any of the above appearance defects are removed to obtain the first - candidate retired power batteries.

[0064] In the embodiments of the present invention, by recognizing the appearance defects of retired power batteries, and then removing the retired power batteries with appearance defects, the first screening of retired power batteries is realized.

[0065] As a possible implementation manner of the present invention, in this implementation manner, as Figure 3 shown, measure the open - circuit voltage and internal resistance of the first - candidate retired power batteries, and remove the first - candidate retired power batteries whose open - circuit voltage is lower than the preset open - circuit voltage threshold and / or whose internal resistance is greater than the preset internal - resistance threshold, including:

[0066] S301, measure the first open - circuit voltage of the first - candidate retired power batteries, and remove the first - candidate retired power batteries whose first open - circuit voltage is less than 2.6V;

[0067] S302, measure the internal resistance of the first - candidate retired power batteries, and remove the first - candidate retired power batteries whose internal resistance is greater than the standard internal resistance of the first - candidate retired power batteries by more than a preset ratio.

[0068] In the embodiments of the present invention, after the appearance screening of retired power batteries is completed, for the first - candidate retired power batteries, first measure the first open - circuit voltage. For example, use a voltage measuring instrument to measure the first open - circuit voltage of each first - candidate retired power battery, and remove the first - candidate retired power batteries whose first open - circuit voltage is less than 2.6V. Then measure the internal resistance of the first - candidate retired power batteries, and remove the first - candidate retired power batteries whose internal resistance is greater than + 10% (or + 15%, depending on different specific implementation manners) of the internal resistance value given in the battery specification.

[0069] In the embodiments of the present invention, by screening the first open - circuit voltage and internal resistance of the first - candidate retired power batteries, it is ensured that the open - circuit voltage and internal resistance of the retired power batteries meet the requirements, and the second screening of retired power batteries is realized.

[0070] As a possible implementation manner of the present invention, in this implementation manner, as Figure 4 shown, obtain the charge and discharge data of the second candidate retired power battery, including:

[0071] S401, perform charge and discharge tests on the second candidate retired power battery in a preset charging environment, and obtain the voltage curve of the second candidate retired power battery during the charge and discharge tests;

[0072] S402, intercept the average voltage curve within a preset voltage range in the voltage curve, and determine the second candidate retired power battery within the preset range of the average voltage curve as the third candidate retired power battery;

[0073] S403, perform a static treatment on the third candidate retired power battery and then measure the second open-circuit voltage, and determine the third candidate retired power battery with the second open-circuit voltage within the preset voltage range as the target retired power battery.

[0074] In the embodiment of the present invention, after completing the screening of the open-circuit voltage and internal resistance of the retired power battery, for the remaining second candidate retired power batteries, it is necessary to perform charge and discharge tests on them. Specifically, the second candidate retired power battery can be in a preset charge and discharge environment, measure the charge and discharge voltage of the second candidate retired power battery, and then screen the second candidate retired power battery according to the charge and discharge voltage. At the same time, it may be necessary to perform static dynamic screening on it to ensure the performance of the target retired power battery.

[0075] Further, performing charge and discharge tests on the second candidate retired power battery in a preset charging environment, and obtaining the voltage curve of the second candidate retired power battery during the charge and discharge tests, includes:

[0076] Obtain the charge voltage curve and discharge voltage curve of the second candidate retired power battery under the preset ambient temperature and preset charging voltage.

[0077] In the embodiment of the present invention, place the second candidate retired power battery in an ambient temperature of about 25 degrees Celsius, and determine its charging voltage according to the single-cell rated charging voltage and the number of series connections of the second candidate retired power battery, obtain the charging voltage curve, and after the battery is fully charged, perform discharge to obtain the discharge voltage curve.

[0078] Further, as Figure 5 shown, intercept the average voltage curve within a preset voltage range in the voltage curve, and determine the second candidate retired power battery within the preset range of the average voltage curve as the third candidate retired power battery, including:

[0079] S501. Take the average of the charging voltage curves of each second candidate retired power battery within the preset charging voltage range as the average charging voltage curve, and take the average of the discharging voltage curves of each second candidate retired power battery within the preset discharging voltage range as the average discharging voltage curve.

[0080] S502. Determine the second candidate retired power batteries with charging voltages within the average charging voltage range and discharging voltages within the average discharging voltage range as the third candidate retired power batteries.

[0081] In the embodiment of the present invention, intercept the charging voltage curves with voltage values ranging from 3.4V to 3.6V among all the charging voltage curves, and calculate the average of the charging voltage curves of each second candidate retired power battery to obtain the average charging voltage curve. Intercept the discharging voltage curves with voltage values ranging from 2.85V to 3.0V among all the discharging voltage curves, and calculate the average of the discharging voltage curves of each second candidate retired power battery to obtain the average discharging voltage curve. Then, shift the charging voltage curve upward by +50mV to +400mV to obtain the upper control line of the voltage deviation, and shift the curve downward by -50mV to -400mV to obtain the lower control line of the voltage deviation. Determine the second candidate retired power batteries with charging voltage curves and discharging voltage curves between the upper and lower control lines as the third candidate retired power batteries.

[0082] Further, as Figure 6 shown, determining the third candidate retired power batteries with the second open circuit voltage within the preset voltage range as the target retired power batteries includes:

[0083] S601. Calculate the average open circuit voltage of the second open circuit voltages of each second candidate retired power battery.

[0084] S602. Eliminate the second candidate retired power batteries whose second open circuit voltage is less than the average open circuit voltage by more than 20 millivolts to obtain the target retired power batteries.

[0085] In the embodiment of the present invention, it is also necessary to statically place and re-measure the second candidate retired power batteries. After statically placing the second candidate retired power batteries for 5 to 7 days, re-measure the open circuit voltage to obtain the second open circuit voltage. Calculate the average of the second open circuit voltages of each second candidate retired power battery. Eliminate the batteries whose second open circuit voltage is lower than the average open circuit voltage by 20mV once again. Then, group them according to static sorting data such as the second open circuit voltage and internal resistance, and use them in pairs with a deviation of 10mV between the second open circuit voltage and the average open circuit voltage and a deviation of 20% between the internal resistance value and the average internal resistance value as a group.

[0086] The present invention has higher efficiency and accuracy. Through a comprehensive screening process that combines static and dynamic aspects, it can further obtain battery performance parameter data, sort batteries according to batches based on this data, making the battery consistency better, the later operation time longer, and the safety more reliable. At the same time, this method also helps to reduce the cost of second-life batteries and improve the utilization rate of battery resources.

[0087] To better implement the method for screening retired power batteries in the embodiments of the present invention, correspondingly, based on the method for screening retired power batteries, as Figure 7 shown, the embodiments of the present invention also provide a device for screening retired power batteries. The device 700 for screening retired power batteries includes:

[0088] A first screening module 701, configured to obtain an appearance image of the retired power battery to be screened, determine the appearance integrity of the retired power battery to be screened based on the appearance image, and eliminate the retired power battery to be screened whose appearance integrity does not meet the preset integrity requirement, so as to obtain a first candidate retired power battery;

[0089] A second screening module 702, configured to measure the open-circuit voltage and internal resistance of the first candidate retired power battery, and eliminate the first candidate retired power battery whose open-circuit voltage is lower than the preset open-circuit voltage threshold and / or whose internal resistance is greater than the preset internal resistance threshold, so as to obtain a second candidate retired power battery;

[0090] A third screening module 703, configured to obtain the charge and discharge data of the second candidate retired power battery, and determine the second candidate retired power battery whose charge and discharge data meet the preset charge and discharge requirements as the target retired power battery.

[0091] The device 700 for screening retired power batteries provided in the above embodiments can implement the technical solutions described in the embodiments of the above method for screening retired power batteries. The specific implementation principles of the above modules or units can be referred to the corresponding content in the embodiments of the above method for screening retired power batteries, and will not be elaborated here.

[0092] As Figure 8 shown, the present invention also correspondingly provides an electronic device 800. The electronic device 800 includes a processor 801, a memory 802, and a display 803. Figure 8 Only some components of the electronic device 800 are shown, but it should be understood that it is not required to implement all the shown components, and more or fewer components can be alternatively implemented.

[0093] The processor 801 can be a central processing unit (CPU), a microprocessor, or other data processing chips in some embodiments, and is configured to run the program code stored in the memory 802 or process data, such as the method for screening retired power batteries in the present invention.

[0094] In some embodiments, the processor 801 may be a single server or a server group. The server group may be centralized or distributed. In some embodiments, the processor 801 may be local or remote. In some embodiments, the processor 801 may be implemented on a cloud platform. In some embodiments, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-cloud, etc., or any combination thereof.

[0095] The memory 802 may be an internal storage unit of the electronic device 800 in some embodiments, such as the hard disk or memory of the electronic device 800. The memory 802 may also be an external storage device of the electronic device 800 in some other embodiments, such as a plug-in hard disk equipped on the electronic device 800, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc.

[0096] Furthermore, the memory 802 may include both the internal storage unit and the external storage device of the electronic device 800. The memory 802 is used to store the application software installed on the electronic device 800 and various types of data.

[0097] The display 803 may be an LED display, a liquid crystal display, a touch liquid crystal display, and an OLED (Organic Light-Emitting Diode) toucher, etc. in some embodiments. The display 803 is used to display the information of the electronic device 800 and to display a visual user interface. The components 801-803 of the electronic device 800 communicate with each other through a system bus.

[0098] In some embodiments, when the processor 801 executes the retired power battery screening program in the memory 802, the following steps may be implemented:

[0099] Obtain the appearance image of the retired power battery to be screened, determine the appearance integrity of the retired power battery to be screened based on the appearance image, eliminate the retired power battery to be screened whose appearance integrity does not meet the preset integrity requirement, and obtain the first candidate retired power battery;

[0100] Measure the open circuit voltage and internal resistance of the first candidate retired power battery, eliminate the first candidate retired power battery whose open circuit voltage is lower than the preset open circuit voltage threshold and / or whose internal resistance is greater than the preset internal resistance threshold, and obtain the second candidate retired power battery;

[0101] Obtain the charge and discharge data of the second candidate retired power battery, and determine the second candidate retired power battery whose charge and discharge data meet the preset charge and discharge requirements as the target retired power battery.

[0102] It should be understood that when the processor 801 executes the retired power battery screening program in the memory 802, in addition to the above functions, other functions can also be realized. For specific details, reference can be made to the descriptions of the corresponding method embodiments above.

[0103] Furthermore, the embodiments of the present invention do not specifically limit the type of the mentioned electronic device 800. The electronic device 800 can be a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop computer, or other portable electronic devices. Exemplary embodiments of the portable electronic device include, but are not limited to, portable electronic devices equipped with IOS, android, microsoft, or other operating systems. The above-mentioned portable electronic devices can also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (such as a touch panel). It should also be understood that in some other embodiments of the present invention, the electronic device 800 can also be a non-portable electronic device, but a desktop computer with a touch-sensitive surface (such as a touch panel).

[0104] Correspondingly, the embodiments of the present invention also provide a computer-readable storage medium. The computer-readable storage medium is used to store computer-readable programs or instructions. When the programs or instructions are executed by a processor, the steps or functions in the retired power battery screening method provided by the above-mentioned method embodiments can be realized.

[0105] Those skilled in the art can understand that all or part of the processes for implementing the methods in the above embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. Among them, the computer-readable storage medium is a magnetic disk, an optical disk, a read-only memory, or a random access memory, etc.

[0106] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A method for screening retired power batteries, characterized in that, Including: Obtain the appearance image of the retired power battery to be screened, determine the appearance integrity of the retired power battery to be screened based on the appearance image, and eliminate the retired power battery to be screened whose appearance integrity does not meet the preset integrity requirement to obtain the first candidate retired power battery; Measure the open-circuit voltage and internal resistance of the first candidate retired power battery, and eliminate the first candidate retired power battery whose open-circuit voltage is lower than the preset open-circuit voltage threshold and / or whose internal resistance is greater than the preset internal resistance threshold to obtain the second candidate retired power battery; Obtain the charge-discharge data of the second candidate retired power battery, and determine the target retired power battery as the second candidate retired power battery whose charge-discharge data meets the preset charge-discharge requirement.

2. The screening method for retired power batteries according to claim 1, wherein The determining the appearance integrity of the retired power battery to be screened based on the appearance image, determining the appearance integrity of the retired power battery to be screened based on the appearance image, eliminating the retired power battery to be screened whose appearance integrity does not meet the preset integrity requirement, and obtaining the first candidate retired power battery includes: Use image recognition technology to determine the size, shape, and defects on the surface of the retired power battery to be screened based on the appearance image; Determine the retired power battery to be screened with appearance defects based on the size, shape, and defects on the surface of the retired power battery to be screened, and eliminate the retired power battery to be screened with appearance defects to obtain the first candidate retired power battery.

3. The screening method for retired power batteries according to claim 1, characterized in that, The measuring the open-circuit voltage and internal resistance of the first candidate retired power battery, and eliminating the first candidate retired power battery whose open-circuit voltage is lower than the preset open-circuit voltage threshold and / or whose internal resistance is greater than the preset internal resistance threshold includes: Measure the first open-circuit voltage of the first candidate retired power battery, and eliminate the first candidate retired power battery whose first open-circuit voltage is less than 2.6V; Measure the internal resistance of the first candidate retired power battery, and eliminate the first candidate retired power battery whose internal resistance exceeds the standard internal resistance of the first candidate retired power battery by a preset ratio.

4. The screening method for retired power batteries according to claim 1, wherein The obtaining the charge-discharge data of the second candidate retired power battery includes: Conduct charge-discharge tests on the second candidate retired power battery in a preset charging environment, and obtain the voltage curve of the second candidate retired power battery in the charge-discharge test; Intercept the average voltage curve within a preset voltage range in the voltage curve, and determine the second candidate retired power battery within the preset range of the average voltage curve as the third candidate retired power battery; Measure the second open-circuit voltage after statically treating the third candidate retired power battery, and determine the third candidate retired power battery whose second open-circuit voltage is within the preset voltage range as the target retired power battery.

5. The screening method for retired power batteries according to claim 4, wherein The conducting charge-discharge tests on the second candidate retired power battery in a preset charging environment, and obtaining the voltage curve of the second candidate retired power battery in the charge-discharge test includes: Obtain the charging voltage curve and discharging voltage curve of the second candidate retired power battery at a preset environmental temperature and a preset charging voltage.

6. The screening method for retired power batteries according to claim 5, wherein, Intercepting the average voltage curve within a preset voltage range of the voltage curve, and determining the second candidate retired power batteries within the preset range of the average voltage curve of the voltage curve as the third candidate retired power batteries, includes: Taking the average of the charging voltage curves of each of the second candidate retired power batteries within a preset charging voltage range as the average charging voltage curve, and taking the average of the discharging voltage curves of each of the second candidate retired power batteries within a preset discharging voltage range as the average discharging voltage curve; Determining the second candidate retired power batteries with the charging voltage within the average charging voltage range and the discharging voltage within the average discharging voltage range as the third candidate retired power batteries.

7. The screening method for retired power batteries according to claim 6, characterized in that, Determining the third candidate retired power batteries with the second open-circuit voltage within a preset voltage range as the target retired power batteries, includes: Calculating the average open-circuit voltage of the second open-circuit voltages of each of the second candidate retired power batteries; Eliminating the second candidate retired power batteries with the second open-circuit voltage less than the average open-circuit voltage by more than 20 millivolts to obtain the target retired power batteries.

8. A screening device for retired power batteries, characterized in that, Includes: A first screening module, configured to obtain the appearance image of the power battery to be screened for retirement, determine the appearance integrity of the power battery to be screened for retirement based on the appearance image, and eliminate the power battery to be screened for retirement whose appearance integrity does not meet the preset integrity requirement to obtain the first candidate retired power batteries; A second screening module, configured to measure the open-circuit voltage and internal resistance of the first candidate retired power batteries, and eliminate the first candidate retired power batteries with the open-circuit voltage lower than the preset open-circuit voltage threshold and / or the internal resistance greater than the preset internal resistance threshold to obtain the second candidate retired power batteries; A third screening module, configured to obtain the charge and discharge data of the second candidate retired power batteries, and determine the second candidate retired power batteries whose charge and discharge data meet the preset charge and discharge requirements as the target retired power batteries.

9. An electronic device, characterized in that, Includes a memory and a processor, wherein, The memory is configured to store programs; The processor is coupled to the memory and is configured to execute the programs stored in the memory to implement the steps in the retired power battery screening method according to any one of claims 1 to 7 above.

10. A computer-readable storage medium, characterized in that, For storing computer-readable programs or instructions, the programs or instructions, when executed by a processor, can implement the steps in the retired power battery screening method according to any one of claims 1 to 7 above.

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