Method for rapidly detecting after-sales returned storage battery

Abstract

The invention discloses a method for rapidly detecting an after-sales retreat storage battery, and the method comprises the steps: carrying out the detection and judgment of the performance state of the after-sales retreat storage battery through a detection tool, and judging whether the storage battery is good or damaged; if the detection tool cannot directly judge whether the storage battery is good or damaged, measuring the specific gravity of the electrolyte of the storage battery; if the specific gravity measurement result of the electrolyte of the storage battery does not meet the preset condition, the storage battery is directly judged as a damaged storage battery; if the measurement result of the specific gravity of the electrolyte of the storage battery meets the preset condition, the performance state of the storage battery is detected and judged again through the detection tool after the storage battery is subjected to constant-current charging with the preset current; and if the storage battery cannot be directly judged to be good or damaged, the processes of measuring the specific gravity of the electrolyte of the storage battery and judging by the detection tool are continued. According to the method, a part of defective storage batteries can be quickly judged by measuring the specific gravity consistency of the electrolyte, so that the judgment time is saved, and the waste of charging energy is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery detection, and more specifically, to a method for quickly detecting returned-after-sale batteries. Background Art

[0002] At present, the main structure of a lead-acid battery consists of a positive plate, a negative plate, a separator, an electrolyte, electrode posts placed in a container composed of a battery case, a battery cover, and an exhaust cover. The lead-acid battery works based on the reversible reaction of: and the principle of repeated charging and discharging, inputting electrical energy and storing it as chemical energy, and releasing chemical energy to be converted into electrical energy output. When the battery is working, the electrolyte serves as a medium between the positive and negative plates and participates in the electrochemical reaction in the battery case. The level of the electrolyte specific gravity indirectly reflects the state of charge of the battery.

[0003] The existing detection methods for returned-after-sale batteries require charging the battery first and then using a special detection tool (such as a Mettler meter) for repeated measurements and judgments. This method cannot quickly determine some defective batteries and has the problem of low working efficiency. Therefore, the present invention considers measuring the consistency of the electrolyte specific gravity of returned-after-sale batteries to quickly eliminate defective batteries. Summary of the Invention

[0004] In view of this, the present invention provides a method for quickly detecting returned-after-sale batteries that at least solves the above partial technical problems. In this method, by measuring the consistency of the electrolyte specific gravity, it is possible to quickly determine a part of the batteries that need to be charged to determine if there are problems, and then quickly eliminate the defective batteries, thereby reducing the process of measuring with a special tool after supplementary charging, which helps to save the judgment time and reduce the waste of charging energy.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] The present invention provides a method for quickly detecting returned-after-sale batteries, and the method includes:

[0007] Step 1: Use a detection tool to detect and judge the performance state of the returned-after-sale battery to determine whether the battery is good or damaged;

[0008] Step 2: If the detection tool cannot directly determine whether the battery is good or damaged, then measure the electrolyte specific gravity of the battery;

[0009] Step 3: If the measurement result of the battery electrolyte specific gravity does not meet the preset conditions, directly determine it as a damaged battery; if the measurement result of the battery electrolyte specific gravity meets the preset conditions, then charge the battery with a preset current at a constant current, and then use the detection tool to detect and judge the performance state of the battery again;

[0010] Step 4: If the detection tool still cannot directly determine whether the battery is in good condition or damaged, continue to measure the specific gravity of the battery electrolyte and return to the operation in Step 3.

[0011] In an alternative embodiment, the detection tool is a Mitter meter.

[0012] In an alternative embodiment, the preset condition is that the deviation of the electrolyte specific gravity < 0.05 g / cm 3 .

[0013] In an alternative embodiment, the preset current is 0.1C 20 A current.

[0014] In an alternative embodiment, if the operation of returning to Step 3 is repeated N times, N ≥ 2; and the performance state of the battery still cannot be directly detected and judged by the detection tool, then the battery is determined to be damaged.

[0015] In an alternative embodiment, before detecting and judging the performance state of the after-sales returned battery by the detection tool, first screen the appearance state of the after-sales returned battery by machine vision. If there is appearance damage, it is directly determined that the battery is damaged.

[0016] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0017] The present invention provides a method for quickly detecting after-sales returned batteries. By measuring the consistency of the electrolyte specific gravity, a part of the batteries that need to be charged before the problems can be determined can be quickly determined, and then the problem batteries can be quickly eliminated, thus reducing the process of measuring with a special tool after supplementary charging, which helps to save the judgment time and reduce the waste of charging energy.

[0018] Other features and advantages of the present invention will be described in the following description of the specification, and some of them will be obvious from the description of the specification, or can be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the written description and the drawings.

[0019] The technical solutions of the present invention will be further described in detail below through the drawings and embodiments. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] The accompanying drawings are used to provide a further understanding of the present invention and form a part of the description. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0022] Figure 1 It is a schematic flow chart of a method for quickly detecting after-sales returned storage batteries provided by an embodiment of the present invention. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention.

[0024] In the description of the present invention, it should be noted that: in some processes described in the specification and accompanying drawings of this application, there are multiple operations that appear in a specific order. However, it should be clearly understood that these operations may not be executed in the order in which they appear herein or may be executed in parallel. In addition, various serial numbers, etc. are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0026] See Figure 1 As shown, an embodiment of the present invention provides a method for quickly detecting after-sales returned storage batteries. The method mainly includes:

[0027] Step 1: Use a detection tool to detect and judge the performance state of the after-sales returned storage battery to determine whether the storage battery is good or damaged;

[0028] Step 2: If the detection tool cannot directly determine whether the storage battery is good or damaged, measure the specific gravity of the storage battery electrolyte;

[0029] Step 3: If the measurement result of the specific gravity of the storage battery electrolyte does not meet the preset conditions, directly determine it as a damaged storage battery; if the measurement result of the specific gravity of the storage battery electrolyte meets the preset conditions, after constant current charging of the storage battery with a preset current, use the detection tool to detect and judge the performance state of the storage battery again;

[0030] Step 4: If the detection tool still cannot directly determine whether the storage battery is good or damaged, continue to measure the specific gravity of the storage battery electrolyte and return to the operation in Step 3.

[0031] A method for quickly detecting returned storage batteries after-sales is proposed by the present invention. By measuring the consistency of the electrolyte specific gravity of the returned batteries after-sales, the problematic batteries can be quickly eliminated, thereby reducing the process of measuring with special tools after supplementary charging, thus saving the judgment time and reducing the waste of charging energy.

[0032] The following will Figure 1 as shown, introduce in detail the principle and specific implementation of the method of the present invention:

[0033] 1. After receiving the returned storage battery, first conduct an appearance screening, and eliminate the batteries with appearance damages such as being damaged by collision, leaking liquid, terminal breakage, etc.

[0034] In a preferred embodiment, to improve work efficiency, machine vision can be used to screen the appearance state of the returned storage batteries after-sales, so as to effectively improve the automation level of the appearance screening of the returned storage batteries after-sales, reduce labor costs, and at the same time provide a scientific basis for subsequent maintenance or scrapping decisions. In the embodiment of the present invention, the system for machine vision screening mainly includes the following parts:

[0035] Light source: Provide uniform and stable illumination to ensure image quality. The light source types that can be used include: ring light source, backlight, bar light source, etc.

[0036] Industrial camera: Used to collect high-resolution images. Select a suitable camera according to the defect size (such as more than 5 million pixels). Interface types: USB3.0, GigE Vision or Camera Link.

[0037] Image processing software: Adopt deep learning models (such as YOLO, Faster R-CNN) for complex defect classification.

[0038] Mechanical device: Used to fix the battery and adjust the position, and use a conveyor belt or a rotating platform to ensure all-round detection.

[0039] Control system: Coordinate the working processes of each module to achieve automated operation.

[0040] Display and recording device: Used to display the detection results in real time and store data.

[0041] The process of detecting the appearance state of the returned storage batteries after-sales by using machine vision includes:

[0042] (1) Preprocessing stage: After the storage battery enters the detection area, it is positioned by a conveyor belt or a manipulator. Use a light source to illuminate the battery surface to reduce shadow interference.

[0043] (2) Image acquisition: An industrial camera takes high-definition images of the battery from different angles. If comprehensive detection is required, multi-view acquisition can be completed through a rotating platform or a multi-camera array.

[0044] (3) Image processing: Traditional algorithms such as edge detection and threshold segmentation are used to extract surface features; based on a deep learning model, common defects are automatically identified and classified; key parameters such as scratch length and depression depth are calculated.

[0045] (4) Result judgment: According to the preset criteria, the batteries are classified into "good" or "damaged" categories. For unqualified batteries, the specific defect types are further marked.

[0046] (5) Follow-up processing: Qualified batteries continue to flow to the next process. Unqualified batteries enter the repair or scrapping process and a detailed report is generated.

[0047] 2. Use a special battery detection tool (such as a Mettler instrument) to measure the batteries after appearance rejection. Generally, there are three output results for the Mettler instrument detection: ① Display "battery is good": Most of these batteries are misjudged by customers and can be directly charged and used as good batteries. ② Display "battery is damaged": These batteries can be directly processed as waste batteries. ③ Display "retest after charging" (it should be noted that "retest after charging" here refers to the display result output by the Mettler instrument): For these batteries, it is usually impossible to directly determine whether the battery can continue to be used. The traditional method generally requires first charging and then repeating the determination by measuring with the Mettler instrument.

[0048] 3. For the batteries with the Mettler instrument showing "retest after charging", the exhaust bolt of the battery needs to be unscrewed, and a specific gravity tester for electrolyte is used to measure the specific gravity of the electrolyte in the six single cells of the battery. For the batteries with an electrolyte specific gravity deviation ≥ 0.05 g / cm3, they are directly judged as damaged batteries and removed. These batteries do not need to be charged and retested after charging.

[0049] 4. For the batteries with an electrolyte specific gravity deviation < 0.05 g / cm3, a constant current charge of 0.1C 20 A is used to charge to a capacity of 1.35*C 20 Ah (for example, for a 20-hour rate 60 Ah battery, the charging method is to use a 6A constant current to charge 81 Ah of electricity).

[0050] 5. Then use a Mitter meter for determination. ① If it shows "Battery is good", it is determined as a good battery, and after directly charging it, it can be used as a good battery. ② If it shows "Battery is damaged", the battery shall be removed and can be directly treated as a waste battery. ③ If it shows "Measure again after charging", return to step 3 to continue measuring the electrolyte specific gravity of the six single cells of the storage battery, and conduct judgment and charging. Most of these batteries may be severely discharged storage batteries that need to be repeatedly charged and discharged to recover. However, if the operation of returning to step 3 is repeated N times (for example, 3 times) and the Mitter meter still cannot directly determine whether the storage battery is good or damaged, it is determined as a damaged storage battery.

[0051] From the description of the above embodiments, those skilled in the art can know that the present invention provides a method for quickly detecting returned storage batteries after-sales. By measuring the consistency of the electrolyte specific gravity of the returned batteries after-sales, problem batteries can be quickly removed (as long as the deviation of the electrolyte specific gravity of the six single cells of a single storage battery ≥ 0.05 g / cm 3 , this battery can be directly determined as an irreparable problem battery), thereby reducing the process of measuring with special tools after charging, thus saving the judgment time and reducing the waste of charging energy. And when conducting appearance inspection, machine vision is used for screening, effectively improving the automation level of screening and reducing the cost.

[0052] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0053] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for quickly detecting after-sales returned batteries, characterized in that: The method includes: Step 1: Use the detection tool to detect the performance status of the returned battery to determine whether the battery is good or damaged; Step 2: If the detection tool cannot directly determine whether the battery is good or damaged, measure the specific gravity of the battery electrolyte; Step 3: If the battery electrolyte specific gravity measurement result does not meet the preset conditions, the battery is directly judged to be damaged; if the battery electrolyte specific gravity measurement result meets the preset conditions, the battery is charged with a preset constant current, and the performance status of the battery is tested and judged again by the detection tool; Step 4: If the detection tool still cannot directly determine whether the battery is good or damaged, continue to measure the specific gravity of the battery electrolyte and return to the operation of step 3.

2. A method for quickly detecting after-sales returned batteries according to claim 1, characterized in that: The detection tool is a Miter meter.

3. A method for rapid detection of after-sales returned batteries according to claim 1, characterized in that: The preset condition is that the electrolyte specific gravity deviation is less than 0.05g / cm 3 .

4. A method for rapid detection of after-sales returned batteries according to claim 1, characterized in that: The preset current is 0.1C 20 A current.

5. A method for rapid detection of after-sales returned batteries according to claim 1, characterized in that: Constant current charging to 1.35 times the rated capacity.

6. A method for rapid detection of after-sales returned batteries according to claim 1, characterized in that: If the operation of returning to step 3 is repeated N times, and N≥2; the battery performance status still cannot be directly detected and determined by the detection tool, then the battery is determined to be damaged.

7. A method for rapid detection of after-sales returned batteries according to claim 1, characterized in that: Before using testing tools to detect and judge the performance status of after-sales returned batteries, machine vision is first used to screen the appearance status of the after-sales returned batteries. If there is any damage to the appearance, it is directly determined to be a damaged battery.

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