Storage battery electrode plate superposition pressure detection device and use method thereof

Abstract

The invention discloses a storage battery electrode plate stacking pressure detection device and a use method thereof. The storage battery electrode plate stacking pressure detection device comprises a conveying mechanism which intermittently conveys stacked electrode groups in the conveying direction; the detection station is located on one side of the conveying mechanism and comprises a pressing plate assembly and a pressure detection platform which are oppositely arranged up and down, and the table top of the pressure detection platform is flush with the conveying surface of the conveying mechanism; an abnormality processing means; a qualified product transfer mechanism; and the second material pushing assembly is arranged on the other side of the conveying mechanism and is opposite to the detection station, the pushing path of the second material pushing assembly covers the pressure detection platform and the material receiving end of the conveying assembly, and the second material pushing assembly is used for pushing the pole group from the conveying mechanism to the pressure detection platform and pushing the pole group to the conveying assembly after detection. Whether the number of polar plates of the polar group is qualified can be effectively detected, the false detection probability is reduced, and the consistency of the capacity of the battery pack is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing, and in particular to a battery plate stacking pressure detection device and a use method thereof. Background Art

[0002] Lead-acid batteries are chemical power sources using lead and its oxides as electrodes and sulfuric acid solution as the electrolyte. Their capacity is primarily achieved by stacking different numbers of plates. Specifically, several positive and negative plates are stacked to form a plate group, which is then connected in series or parallel to form a complete battery.

[0003] During automated production, due to factors such as mechanical positioning errors in existing automated equipment, repeated or missed plates in mechanical grasping, and plate transfer offsets, the stacking process can result in either too few or too many plates. A missing plate reduces the effective reaction area of the pack, while an excessive number of plates leads to an abnormal increase in the pack's internal resistance. Both situations significantly impact the capacity consistency of the battery pack and can lead to quality issues. Therefore, the number of plates must be checked to ensure the correct number.

[0004] Most existing technologies use weighing detection to determine whether the number of plates is correct based on the weight of the electrode group. However, the plates are cast from lead. Due to the high density of lead, the density of the plates may be uneven due to fluctuations in the casting process (such as internal bubbles and impurities) during the production process. The weight of the plates is determined by the density and volume. Although the shape of the plates is defined by the mold and the error is very small, the density of each plate may have a large error. When the plates are stacked into a electrode group, the error in the total weight may exceed the weight of a single plate, causing the weight detection to fail and false detection to occur, leading to quality problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a battery plate stacking pressure detection device and a method of using the same, which can effectively detect whether the number of plates in a pole group is qualified, reduce the probability of false detection, and ensure the consistency of the battery pack capacity.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a battery plate stacking pressure detection device, comprising: The conveying mechanism intermittently conveys the stacked electrode groups along the conveying direction; The detection station is located on one side of the conveying mechanism, and includes a pressure plate assembly and a pressure detection platform arranged opposite to each other, and the table surface of the pressure detection platform is flush with the conveying surface of the conveying mechanism; an abnormality handling mechanism, comprising an abnormality collection platform and a first pushing assembly disposed on opposite sides of the pressure detection platform, wherein the pushing direction of the first pushing assembly is parallel to the conveying direction of the conveying mechanism; A qualified transfer mechanism, comprising a transmission component located on a side of the pressure testing platform away from the conveying mechanism; The second pushing assembly is arranged on the other side of the conveying mechanism and opposite to the detection station. Its pushing path covers the pressure detection platform and the receiving end of the conveying assembly. It is used to push the pole group from the conveying mechanism to the pressure detection platform and push it to the conveying assembly after detection.

[0007] A further improvement of the present invention is that the conveying component is a chain plate conveyor, and a plurality of pole group positioning clamps spaced apart along the conveying direction are fixed on its chain plate belt, each clamp includes a base plate and two limit plates arranged on the base plate, and a clamp is formed between the two limit plates. When each pole group positioning clamp runs to the turning section at one end of the chain plate conveyor, the clamp is changed from a vertical state to a horizontal state, and is aligned with the pushing direction of the second pushing component.

[0008] A further improvement of the present invention is that the pressure plate assembly includes a vertically arranged pressure plate cylinder, the telescopic end of the pressure plate cylinder is vertically downward and a pressure plate is provided thereon.

[0009] A further improvement of the present invention is that the first pushing assembly includes a first cylinder, the telescopic direction of the first cylinder is parallel to the conveying direction of the conveying mechanism, and a first push plate is provided on the telescopic end of the first cylinder.

[0010] A further improvement of the present invention is that the second pushing assembly includes a second cylinder, the telescopic direction of the second cylinder is perpendicular to the conveying direction of the conveying mechanism, and a second push plate is provided on the telescopic end thereof, and the width of the second push plate is smaller than the spacing between the two groups of pole ears on the pole group.

[0011] A further improvement of the present invention is that the chain plate conveyor is provided with a pole group shaping assembly, and the pole group shaping assembly includes side shaping cylinders symmetrically arranged on both sides of the horizontal conveying surface of the chain plate conveyor, and the telescopic ends of the shaping cylinders on both sides are arranged opposite to each other and are provided with shaping plates with a width matching the distance between the two limit plates.

[0012] A further improvement of the present invention is that the pole group shaping assembly also includes a downward-pressing shaping cylinder arranged above the horizontal conveying surface of the chain plate conveyor, and the telescopic end of the downward-pressing shaping cylinder is vertically downward and has a pressure head provided thereon.

[0013] A further improvement of the present invention is that the width of the pressure head is smaller than the distance between the two groups of pole tabs on the pole group, and the lower end surface of the pressure head is provided with chamfers on both sides.

[0014] The present invention also provides a method for using a battery plate stacking pressure detection device, the method comprising the following steps: S1. The stacked electrode group is conveyed stepwise to the alignment position at the inspection station by a conveyor mechanism. S2 starts the pressure plate assembly to apply pressure to the lower pressure pole group with a fixed stroke, and obtains the actual pressure value through the pressure detection platform; S3. Compare the actual pressure value with the preset threshold: When the detection pressure value is within the preset qualified range, it is determined that the number of plates is normal, and the second pushing assembly is started to transfer the plate group to the chain plate conveyor; When the detection pressure value exceeds or falls below the qualified range, it is determined that the number of plates is abnormal, and the first pushing component is started to push the plate group into the abnormal collection platform; S4. During the operation of the chain plate conveyor, the pole group is shaped by the pole group shaping component; S5. Transport the shaped electrode group to the next process.

[0015] The beneficial effects of the present invention are: The present invention sets a detection station on one side of the conveying mechanism, and can effectively detect whether the number of pole plates in the pole group is qualified by pressing the pole group detection pressure. The weighing detection in the existing technology is greatly affected by density fluctuations. For example, bubbles or impurities during casting lead to large differences in the weight of the single pole plate. The total error after superposition may exceed the weight of the single plate, making the detection invalid. The present invention detects whether the number of pole plates is correct by the thickness of the pole group. Since the outer dimensions of the pole plate are precisely controlled by the mold, the thickness error is smaller than the weight error. The total thickness error after superposition is relatively stable, and the influence of density fluctuations is avoided. Therefore, the pressure value is more reliable, effectively reducing the probability of false detection and ensuring the consistency of the battery pack capacity.

[0016] The present invention ensures that the stroke and speed of each pressure application are consistent through the fixed stroke downward pressure of the pressure plate cylinder. When the pole group has many or few plates, the thickness of a single plate is significantly greater than the overall thickness error. The pressure detection platform can accurately distinguish the difference between a normal pole group and a pole group with many or few plates by calibrating the pressure reference value range of a qualified pole group, thereby avoiding the detection failure problem caused by material density fluctuations in the traditional weighing method.

[0017] The inspection station of the present invention is located between the conveying mechanism and the qualified transfer mechanism. Through the different extension strokes of the first pushing component, the pole group can be pushed from the conveying mechanism to the pressure detection platform, and then pushed into the pole group positioning fixture after passing the inspection, so that the qualified fixture changes from a horizontal state to an upright state, which is convenient for the robot to grasp.

[0018] In the present invention, by arranging a pole group shaping component on the qualified transfer mechanism, multiple pole plates in the pole group can be aligned, effectively eliminating the stacking offset, and further facilitating the picking up of the robot arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention (the abnormality collection platform is not shown in the figure).

[0020] Figure 2 It is a schematic top view of the structure of the present invention.

[0021] Figure 3 It is a partially enlarged schematic top view of the shaping plate structure of the present invention.

[0022] Figure 4 It is a partially enlarged schematic diagram of the main view of the pressure head structure of the present invention.

[0023] In the figure, 1- conveying mechanism, 2- pressure detection platform, 3- abnormality collection platform, 4- chain plate conveyor, 5- bottom plate, 6- limit plate, 7- pressure plate cylinder, 8- pressure plate, 9- first cylinder, 10- first push plate, 11- second cylinder, 12- second push plate, 13- side shaping cylinder, 14- shaping plate, 15- downward pressure shaping cylinder, 16- pressure head, 17- pole group, 18- pole ear. DETAILED DESCRIPTION

[0024] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1: Combination Figure 1-4 It can be seen that a battery plate stacking pressure detection device includes: Conveying mechanism 1, intermittently conveying the stacked electrode groups along the conveying direction; The detection station is located on one side of the conveying mechanism 1 and includes a pressure plate assembly and a pressure detection platform 2 arranged opposite to each other. The surface of the pressure detection platform 2 is flush with the conveying surface of the conveying mechanism 1; The abnormality handling mechanism includes an abnormality collection platform 3 and a first pushing assembly arranged on both sides of the pressure detection platform 2. The pushing direction of the first pushing assembly is parallel to the conveying direction of the conveying mechanism 1. The qualified transfer mechanism includes a transmission component located on a side of the pressure testing platform 2 away from the conveying mechanism 1; The second pushing assembly is arranged on the other side of the conveying mechanism 1 and opposite to the detection station. Its pushing path covers the pressure detection platform 2 and the receiving end of the conveying assembly. It is used to push the pole group from the conveying mechanism 1 to the pressure detection platform 2 and push it to the conveying assembly after detection.

[0026] The present invention integrates quality inspection, classification and shaping into a continuous production line by combining pressure detection with mechanical sorting, thereby improving detection efficiency while achieving immediate rejection of defective products and automatic circulation of qualified products.

[0027] The conveying assembly is a chain plate conveyor 4, on which a plurality of pole group positioning fixtures are fixed at intervals along the conveying direction. Each fixture includes a bottom plate and two limit plates 6 arranged on the bottom plate 5. A clamp is formed between the two limit plates 6. When each pole group positioning fixture runs to the turning section at one end of the chain plate conveyor 4, the clamp changes from a vertical state to a horizontal state and aligns with the pushing direction of the second pusher assembly. Preferably, see Figure 2 The limiting plate 6 is provided with an avoidance opening for facilitating the robot to grasp.

[0028] The pressure plate assembly includes a vertically arranged pressure plate cylinder 7, the telescopic end of which points vertically downward and is provided with a pressure plate 8. The pressure plate assembly can be raised and lowered vertically to a fixed height to apply pressure to the pole group. The pressure detection platform is used to detect the pressure on the pole group.

[0029] The qualified detection range of pressure detection platform 2 is set according to the pole group. For example, for a 20Ah pole group, the required compression distance is 28mm, the pressure standard is 35-45kpa, and the actual measurement is 37-43kpa. The pressure measurement of simulating one more or one less plate is 57-65kpa when one more plate is added, and 21-26kpa when one less plate is added. By collecting 50 sets of normal sample data, the unqualified range can be set based on the above data. When the pressure is greater than 50kpa or less than 30kpa, it can be determined as an abnormal superposition pole group with an incorrect number. The pole group is pushed to the abnormal collection platform 3 by the abnormal cylinder and waits for manual repair.

[0030] The first pushing assembly includes a first cylinder 9 , the telescopic direction of the first cylinder 9 is parallel to the conveying direction of the conveying mechanism 1 , and a first pushing plate 10 is provided on the telescopic end of the first cylinder 9 .

[0031] The second pushing assembly includes a second cylinder 11, the telescopic direction of the second cylinder 11 is perpendicular to the conveying direction of the conveying mechanism 1, and a second push plate 12 is provided on its telescopic end. The width of the second push plate 12 is smaller than the spacing between the two groups of pole ears on the pole group.

[0032] The chain plate conveyor 4 is provided with a pole group shaping assembly, which includes side shaping cylinders 13 symmetrically arranged on both sides of the horizontal conveying surface of the chain plate conveyor 4. The telescopic ends of the shaping cylinders 13 on both sides are arranged opposite to each other and are provided with shaping plates 14 with a width matching the spacing between the two limit plates 6.

[0033] The pole group shaping assembly also includes a downward-pressing shaping cylinder 15 arranged above the horizontal conveying surface of the chain plate conveyor 4. The telescopic end of the downward-pressing shaping cylinder 15 is vertically downward and a pressure head 16 is provided on it.

[0034] The width of the indenter 16 is smaller than the spacing between the two sets of tabs on the electrode group, and the lower end surface of the indenter 16 is chamfered on both sides. The chamfered design reduces frictional resistance when in contact with the electrode group, preventing scratches on the electrode surface. At the same time, the small width of the indenter can avoid the tabs, ensuring the pressing effect while protecting the integrity of key components.

[0035] The steps of using a battery plate stacking pressure detection device of the present invention are as follows: S1. The stacked pole group is transported step by step to the alignment position of the detection station by the conveying mechanism 1; S2 starts the pressure plate assembly to apply pressure to the lower pressure pole group under a fixed stroke, and obtains the actual pressure value through the pressure detection platform 2; S3. Compare the actual pressure value with the preset threshold: When the detection pressure value is within the preset qualified range, it is determined that the number of plates is normal, and the second pushing assembly is started to transfer the plate group to the chain plate conveyor 4; When the detection pressure value exceeds or falls below the qualified range, it is determined that the number of plates is abnormal, and the first pushing component is started to push the plate group into the abnormal collection platform 3; S4. During the operation of the chain conveyor 4, the pole group shaping component is formed by the pole group; S5. Transport the shaped electrode group to the next process.

[0036] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are similarly included in the patent protection scope of the present invention.

Claims

1. A battery plate stacking pressure detection device, characterized in that: include: A conveying mechanism (1) for intermittently conveying the stacked electrode groups along a conveying direction; A detection station is located on one side of the conveying mechanism (1), comprising a pressure plate assembly and a pressure detection platform (2) arranged opposite to each other in an upper and lower direction, wherein the surface of the pressure detection platform (2) is flush with the conveying surface of the conveying mechanism (1); An abnormality handling mechanism comprises an abnormality collecting platform (3) and a first pushing assembly relatively arranged on both sides of the pressure detection platform (2), wherein the pushing direction of the first pushing assembly is parallel to the conveying direction of the conveying mechanism (1); A qualified transfer mechanism, comprising a conveying assembly located on a side of the pressure detection platform (2) away from the conveying mechanism (1); The second pushing assembly is arranged on the other side of the conveying mechanism (1) and opposite to the detection station, and its pushing path covers the pressure detection platform (2) and the receiving end of the conveying assembly, and is used to push the electrode group from the conveying mechanism (1) to the pressure detection platform (2) and push it to the conveying assembly after detection.

2. The battery plate stacking pressure detection device according to claim 1, characterized in that: The conveying assembly is a chain plate conveyor (4), and a plurality of pole group positioning clamps are fixed on the chain plate belt and are spaced apart along the conveying direction. Each clamp includes a base plate and two limit plates (6) provided on the base plate (5), and a clamp is formed between the two limit plates (6). When each pole group positioning clamp runs to the turning section at one end of the chain plate conveyor (4), the clamp changes from a vertical state to a horizontal state and is aligned with the pushing direction of the second pushing assembly.

3. The battery plate stacking pressure detection device according to claim 1, characterized in that: The pressing plate assembly comprises a vertically arranged pressing plate cylinder (7), the telescopic end of the pressing plate cylinder (7) being vertically downward and having a pressing plate (8) arranged thereon.

4. The battery plate stacking pressure detection device according to claim 1, characterized in that: The first pushing assembly comprises a first cylinder (9), the telescopic direction of the first cylinder (9) is parallel to the conveying direction of the conveying mechanism (1), and a first pushing plate (10) is provided on the telescopic end of the first cylinder (9).

5. A battery plate stacking pressure detection device according to claim 1 or 4, characterized in that: The second pushing assembly includes a second cylinder (11), the telescopic direction of the second cylinder (11) is perpendicular to the conveying direction of the conveying mechanism (1), and a second pushing plate (12) is provided on the telescopic end thereof, and the width of the second pushing plate (12) is smaller than the spacing between the two groups of pole ears on the pole group.

6. The battery plate stacking pressure detection device according to claim 2, characterized in that: The chain plate conveyor (4) is provided with a pole group shaping assembly, which includes side shaping cylinders (13) symmetrically arranged on both sides of the horizontal conveying surface of the chain plate conveyor (4), and the telescopic ends of the shaping cylinders (13) on both sides are arranged opposite to each other and are provided with shaping plates (14) with a width matching the spacing between the two limit plates (6).

7. The battery plate stacking pressure detection device according to claim 6, characterized in that: The pole group shaping assembly further comprises a downward-pressing shaping cylinder (15) arranged above the horizontal conveying surface of the chain plate conveyor (4), wherein the telescopic end of the downward-pressing shaping cylinder (15) is vertically downward and a pressure head (16) is provided thereon.

8. The battery plate stacking pressure detection device according to claim 7, characterized in that: The width of the pressure head (16) is smaller than the spacing between the two sets of pole lugs on the pole group, and the lower end surface of the pressure head (16) is provided with chamfers on both sides.

9. A method for using a battery plate stacking pressure detection device according to any one of claims 1 to 8, characterized in that: The steps of this method are as follows: S1. The stacked pole group is conveyed stepwise to the alignment position of the inspection station by the conveying mechanism (1); S2. Start the pressure plate assembly to apply pressure to the pressure pole group under a fixed stroke, and obtain the actual pressure value through the pressure detection platform (2); S3. Compare the actual pressure value with the preset threshold: When the detection pressure value is within the preset qualified range, it is determined that the number of plates is normal, and the second pushing component is started to transfer the plate group to the chain plate conveyor (4); When the detected pressure value exceeds or falls below the qualified range, it is determined that the number of plates is abnormal, and the first pushing component is activated to push the plate group into the abnormal collection platform (3); S4. During the operation of the chain plate conveyor (4), the pole group is shaped by the pole group shaping component; S5. Transport the shaped electrode group to the next process.

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