Lead-acid battery plate paste uniformity control processing equipment and method

Abstract

The present invention discloses a lead-acid battery plate paste uniformity control processing equipment and method, which relates to the field of battery manufacturing technology. In the present invention: the battery grid is placed in a shelf area, the shelf area bottom plate is provided with a plurality of array-distributed lower through-holes, a lower lifter is provided below the transmission plate, a movable plate is provided on the upper side of the support plate, a plurality of convex columns matching the lower through-holes are provided on the top surface of the movable plate, a pressure sensing module is built into the support plate that is in extrusion contact with the bottom surface of the movable plate, and a distance probe matching the positioning gap is provided on the support plate. The bottom side of the paste injector is provided with a paste injection bottom plate matching the shelf area, the paste injector is provided with a diversion inner cavity located above the paste injection bottom plate, and the paste injection bottom plate is provided with a paste injection hole for injecting lead paste toward the shelf area. The present invention solves the problem of poor paste application on the other side of the grid caused by traditional single-direction paste application, improves the distribution uniformity of the lead paste on the battery grid, and also improves the bonding strength between the lead paste and the battery grid.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing, and in particular to a lead-acid battery plate paste uniformity control processing device and method. Background Art

[0002] Lead-acid batteries are a chemical power source widely used in automotive, energy storage, communications, and other fields. Their performance and quality directly impact the operational stability and service life of related equipment. Grid paste application is a crucial step in the lead-acid battery production process, and the uniformity of the paste significantly impacts key battery indicators such as charge and discharge performance, internal resistance, and cycle life.

[0003] Currently, the following major issues exist in the pasting process for lead-acid battery grids: Traditional pasting methods often utilize a single-directional application process, such as applying the paste from the top of the grid. This method results in good adhesion of the paste on the side of the grid closest to the paste source, but poor adhesion on the other side. This leads to uneven distribution of the paste across the grid, resulting in some areas being too thick and others being insufficient. Areas with excessively thick paste are prone to active material shedding during battery charge and discharge, impacting the battery's cycle life. Areas with insufficient paste, on the other hand, increase the battery's internal resistance and reduce charge and discharge performance.

[0004] The existing solution is to apply paste to one side of the grid, then flip it over with a flipping mechanism and apply paste again on the other side. However, this method lengthens the production line and significantly increases process and equipment costs. Furthermore, the bonding strength between the lead paste and the grid is weak with traditional paste application, and flipping can cause the paste to shift or fall off, reducing production efficiency and product quality.

[0005] In summary, how to overcome the problem of poor paste coating on the other side of the grid caused by traditional single-direction paste coating, ensure the bonding strength between the lead paste and the battery grid, and avoid frequent action of the grid flipping mechanism have become problems that need to be solved in the production process of lead-acid batteries. Summary of the Invention

[0006] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention provides a process for controlling the uniformity of lead-acid battery plate paste coating, comprising a transmission plate having a raised ring on its upper surface and a resting area within the raised ring. The battery grid is placed in the resting area, and the bottom plate of the resting area is provided with a plurality of lower through-holes arranged in an array. The bottom surface of the transmission plate is provided with a set of positioning gaps. A lower lifter is disposed below the transmission plate, with an output end facing upward and drivingly connected to a support plate parallel to the transmission plate. A movable plate is disposed above the support plate, and a plurality of protrusions are disposed on the top surface of the movable plate, which engage with the lower through-holes. The support plate is provided with a built-in pressure sensor module that is in compressive contact with the bottom surface of the movable plate. The support plate is also provided with a set of distance probes that engage with the positioning gaps. An upper lifter is disposed above the transmission plate, with an output end facing downward and drivingly connected to a paste injector. The bottom of the paste injector is provided with a paste injection base plate that engages with the resting area. The paste injector has a diversion cavity located above the paste injection base plate, and the paste injection base plate has a paste injection hole for injecting lead paste toward the resting area.

[0008] As a preferred technical solution of the device of the present invention: a convex ring notch is opened on one side of the convex ring, a positioning notch matching the convex ring notch is opened on the bottom surface of the paste injector, and the pole ears of the battery grid are placed at the positions of the convex ring notch and the positioning notch.

[0009] As a preferred technical solution of the device of the present invention: the positioning gap is located directly below the position of the raised ring, and the vertical cross-section of the positioning gap is an isosceles triangle.

[0010] As a preferred technical solution of the equipment of the present invention: the output end of the lower lifter is provided with a driving shaft, the upper end of the driving shaft is fastened to a reinforcing bracket via a threaded structure, and the support plate is fixedly mounted on the upper side of the reinforcing bracket.

[0011] As a preferred technical solution of the device of the present invention: a convex ring groove cooperating with the convex ring is provided on the bottom surface of the paste injector, and the vertical cross-sections of the convex ring and the convex ring groove are isosceles trapezoids.

[0012] As an optimal technical solution for the equipment of the present invention: a lifting frame connected to the output end of the upper lifter is fixedly connected to the top of the paste injector, a paste injection pipe is connected to the center position of the top of the paste injector, the paste injection pipe is connected to the diversion inner cavity of the paste injector, and the upstream of the paste injection pipe is connected to the lead paste supply equipment.

[0013] As a preferred technical solution of the device of the present invention: the paste injection holes are arranged in a matrix on the paste injection base plate, and the vertical distribution positions of the multiple paste injection holes are staggered with the vertical distribution positions of the multiple lower through holes.

[0014] The present invention provides a method for controlling the uniformity of lead-acid battery plate paste coating, which includes the following steps:

[0015] In step one, the battery grid is placed in the holding area that has not entered the pasting station through automated equipment, and the tabs of the battery grid are placed at the notch position of the raised ring.

[0016] In step two, as the transmission plate advances, if both distance probes detect a positioning gap, the transmission plate stops advancing. The lower lifter drives the support plate upward until the upper portion of the boss inserts into the lower through-hole. At this point, the lower lifter stops and locks the position. The upper lifter drives the injector downward until the injector's raised ring slot fully engages the raised ring. At this point, the upper lifter stops and locks the position.

[0017] In step three, the paste injector continuously applies downward pressure to inject paste into the battery grid. The lead paste evenly enters various positions of the battery grid and moves downward into the lower perforation.

[0018] In the fourth step, when the lead paste in the lower perforation continues to increase, the pressure on the movable plate increases. When the pressure detected by the pressure sensing module increases to a value not lower than the preset reference pressure, the paste injector stops injecting paste and locks it. The lower lifter drives the support plate to continue to move upward until the boss is fully inserted into the lower perforation, and the lead paste that originally penetrated into the upper area of the lower perforation is pressed into the shelf area and adhered to the surface of the battery grid.

[0019] In step five, the lower lifter drives the support plate downward, causing the boss to completely detach from the lower through hole.

[0020] In step six, the upper lift drives the paste injector to move above the upper surface of the battery grid after paste is applied.

[0021] In step seven, the transmission plate drives the battery grid coated with paste to continue moving forward.

[0022] Step 8: Repeat steps 1 to 7.

[0023] Compared with the existing technology, the beneficial effects of the present invention are:

[0024] 1. The present invention pre-perforates the lead paste to the over-position by injecting it into the downward hole, and then continues to push the protruding column upward through the lower lifter to reversely fill the lead paste in the lower perforation upward to the bottom area of the battery grid, so that the battery is embedded in the bottom side and the paste coating operation is completed comprehensively and fully, which solves the problem of poor paste coating effect on the other side of the grid caused by traditional single-direction paste coating, improves the uniformity of lead paste distribution on the battery grid, and also improves the bonding strength between the lead paste and the battery grid.

[0025] 2. The processing equipment and method of the present invention do not require flipping the grid for secondary coating, which reduces the use of flipping mechanisms and corresponding operating procedures and simplifies the production process.

[0026] 3. The device incorporates a pressure sensor module that monitors the pressure applied to the movable plate in real time. When the pressure reaches a preset reference value, the paste injector stops injecting paste. This precise control ensures that each battery grid receives the appropriate amount of lead paste, preventing over- or under-applying, further improving product consistency and stability, and reducing battery performance variations caused by differences in paste application and bonding. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall component distribution of the plate paste coating equipment of the present invention.

[0028] Figure 2 for Figure 1 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0029] Figure 3 It is a top view schematic diagram of the transmission plate in the present invention.

[0030] Figure 4 This is a schematic diagram of the overall component distribution when starting to apply the paste in the present invention.

[0031] Figure 5 for Figure 4 Schematic diagram of the structure with a partial enlargement at point B.

[0032] Figure 6 This is a schematic diagram of the present invention showing that the protruding column is completely inserted into the lower through hole when the paste application is completed.

[0033] Among them: 1- transmission plate, 101- raised ring, 1011- raised ring notch, 102- shelf area, 103- lower through hole, 104- positioning gap; 2- battery grid, 201- pole ear; 3- lower lifter, 301- drive shaft; 4- reinforced bracket; 5- support plate; 6- pressure sensor module; 7- movable plate, 701- raised column; 8- distance probe; 9- paste injector, 901- paste injection bottom plate, 9011- paste injection hole, 902- diversion cavity, 903- positioning notch, 904- raised ring slot, 905- paste injection pipe; 10- lifting frame, 11- upper lifter. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] Example 1: The present invention designs a processing equipment and method for producing lead-acid battery grid paste, combined with the attached Figure 1 To the attached Figure 6 For detailed description. Figure 1 、 Figure 4 The core components of the device of the present invention include key structures such as the transmission plate 1, the lower lifter 3, the paste injector 9 and the movable plate 7. The following will fully describe the structural design, working process and operation method of the device in combination with the drawings and the specific operating principle.

[0036] First, the transmission plate 1 serves as the basic bearing component of the entire device, such as Figure 1 、 Figure 2 、 Figure 3 , its upper surface is provided with a raised ring 101, which is used to define the position of the battery grid 2. The inner circle of the raised ring 101 forms a shelf area 102 for placing the battery grid 2. The bottom plate of the shelf area 102 is provided with a plurality of lower through holes 103 distributed in an array. The design of these lower through holes 103 allows the lead paste to penetrate downward during the coating process, thereby achieving reverse extrusion of the bottom area of the battery grid 2. In addition, a positioning gap 104 is provided on the bottom surface of the transmission plate 1. The positioning gap 104 cooperates with the distance probe 8 to accurately locate the position of the transmission plate 1. A raised ring notch 1011 is provided on one side of the raised ring 101 to accommodate the pole ear 201 of the battery grid 2, ensuring the accurate positioning of the battery grid 2 in the shelf area 102. The positioning gap 104 is located directly below the position of the raised ring 101, and its vertical cross-section is an isosceles triangle, which is convenient for the distance probe 8 to perform precise detection.

[0037] like Figure 1 , a lower lifter 3 is arranged below the transmission plate 1, the output end of the lower lifter 3 faces upward and is connected to the reinforcement bracket 4 through the drive shaft 301. A support plate 5 is fixedly mounted on the reinforcement bracket 4, and a movable plate 7 is arranged on the upper side of the support plate 5. Figure 2 、 Figure 5 、 Figure 6 The top surface of the movable plate 7 is provided with a plurality of bosses 701 that match the lower through-holes 103. These bosses 701 are used to squeeze the lead paste upward to the shelf area 102 after the paste coating is completed, thereby completing the comprehensive coating of the bottom area of the battery grid 2. The support plate 5 has a built-in pressure sensing module 6, which is in contact with the bottom surface of the movable plate 7 and monitors the pressure changes applied by the lead paste in real time. After the lead paste is injected through the paste injector 9, the pressure on the movable plate 7 gradually increases. When the pressure detected by the pressure sensing module 6 reaches the preset reference pressure value, the paste injector 9 stops injecting the paste. This design ensures that each battery grid 2 can obtain an appropriate amount of lead paste, avoiding the performance instability problem caused by the difference in the amount of lead paste in the traditional paste coating process.

[0038] like Figure 1 、 Figure 4 , an upper lifter 11 is arranged above the transmission plate 1, and the output end of the upper lifter 11 faces downward and drives the paste injector 9. Figure 2 、 Figure 5 、 Figure 6The bottom side of the paste injector 9 is provided with a paste injecting base plate 901, which cooperates with the shelf area 102. The paste injecting base plate 901 is provided with paste injecting holes 9011 for injecting lead paste into the battery grid 2. The paste injecting holes 9011 and the lower through-holes 103 are staggered in the vertical direction, so that the lead paste injected by the paste injecting holes 9011 will not directly enter the lower through-holes 103, and will be more fully and fully filled and coated on the upper and lower areas of the battery grid 2. The inside of the paste injector 9 is provided with a diversion cavity 902 for evenly distributing the lead paste to ensure that the lead paste can evenly enter the shelf area 102. The bottom surface of the paste injector 9 is provided with a positioning notch 903 and a convex ring groove 904, which respectively cooperate with the convex ring notch 1011 of the convex ring 101 and the convex ring 101 to ensure the precise alignment of the paste injector 9 and the transmission plate 1. The top center of the paste injector 9 is connected to a paste injection pipe 905 , which is communicated with the diversion cavity 902 and connected to a lead paste supply device upstream to achieve continuous supply of lead paste.

[0039] The working process of the processing equipment of the present invention is as follows:

[0040] First, the battery grid 2 is placed in the holding area 102 that has not entered the paste application station through automated equipment, and the tabs 201 of the battery grid 2 are placed at the positions of the convex ring notch 1011 and the locking notch 903 to complete the initial positioning of the battery grid 2. Subsequently, when the transmission plate 1 moves forward and both distance probes 8 detect the positioning gap 104, the transmission plate 1 stops moving forward. At this time, the lower lifter 3 drives the support plate 5 to move upward until the upper half of the boss 701 is inserted into the lower through-hole 103, and the lower lifter 3 stops driving and locks the position. Next, the upper lifter 11 drives the paste injector 9 to move downward until the convex ring slot 904 of the paste injector 9 is fully matched with the convex ring 101, and the upper lifter 11 stops driving and locks the position.

[0041] Then, the paste injector 9 continues to pressurize downwards and injects lead paste into the battery grid 2 through the paste injection hole 9011. The lead paste evenly enters each position of the battery grid 2 and moves downwards into the lower through hole 103. Figure 4 and Figure 5 As shown, after the lead paste is injected from the paste injection hole 9011, it diffuses along the surface of the battery grid 2 and penetrates into the area below the shelf area 102 through the lower perforation 103. When the lead paste in the lower perforation 103 continues to increase, the pressure on the movable plate 7 increases. When the pressure detected by the pressure sensing module 6 reaches the preset reference pressure value, the paste injector 9 stops injecting the paste and locks. At this time, the lower lifter 3 continues to drive the support plate 5 upward until the boss 701 is fully inserted into the lower perforation 103, and the lead paste that originally penetrated into the upper area of the lower perforation 103 is squeezed upward to the shelf area 102, attached to the surface of the battery grid 2, and the full paste application operation is completed. Figure 6As shown, after the boss 701 is fully inserted into the lower through hole 103, the lead paste is evenly distributed in various areas of the battery grid 2, ensuring the uniformity and integrity of the paste.

[0042] Next, the lower lifter 3 drives the support plate 5 downward, completely disengaging the boss 701 from the lower through-hole 103. Subsequently, the upper lifter 11 drives the paste injector 9 upward to the upper surface of the pasted battery grid 2. The transmission plate 1 drives the pasted battery grid 2 forward, moving it to the next process or unloading station.

[0043] Finally, repeat the above steps to achieve continuous production.

[0044] In summary, the present invention achieves uniform distribution of lead paste across the battery grid 2 through the synergistic effect of the unique design of the transmission plate 1, the paste injector 9, and the lower lifting system. This improves production efficiency and product consistency, and enhances the bonding strength of the lead paste coating. Real-time monitoring by the pressure sensing module 6 ensures that each battery grid 2 receives the appropriate amount of lead paste, avoiding excessive or insufficient amounts, further enhancing product consistency and stability.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lead-acid battery plate paste uniformity control processing equipment, characterized by: It comprises a transmission plate (1), the upper surface of which is provided with a raised ring (101), a shelf area (102) located within the raised ring (101), a battery grid (2) is placed in the shelf area (102), a bottom plate of the shelf area (102) is provided with a plurality of array-distributed lower through holes (103), and a group of positioning gaps (104) are provided on the bottom surface of the transmission plate (1); A lower lifter (3) is provided below the transmission plate (1), the output end of the lower lifter (3) faces upward and drives a support plate (5) connected to the transmission plate (1), a movable plate (7) is provided on the upper side of the support plate (5), a top surface of the movable plate (7) is provided with a plurality of bosses (701) that match the lower through holes (103), a pressure sensing module (6) is built into the support plate (5) and is in compression contact with the bottom surface of the movable plate (7), and a group of distance probes (8) that match the positioning gap (104) are provided on the support plate (5); An upper lifter (11) is provided above the transmission plate (1), the output end of the upper lifter (11) faces downward and is driven to be connected to a paste injector (9), the bottom side of the paste injector (9) is provided with a paste injecting base plate (901) that matches the shelf area (102), the paste injector (9) is provided with a diversion cavity (902) located above the paste injecting base plate (901), and the paste injecting base plate (901) is provided with a paste injecting hole (9011) for injecting lead paste toward the shelf area (102); The paste injection holes (9011) are arranged in a matrix on the paste injection base plate (901), and the vertical distribution positions of the plurality of paste injection holes (9011) and the vertical distribution positions of the plurality of lower through holes (103) are interlaced with each other.

2. The lead-acid battery plate paste uniformity control processing equipment according to claim 1, characterized in that: A convex ring notch (1011) is provided on one side of the convex ring (101), a locking notch (903) that matches the convex ring notch (1011) is provided on the bottom surface of the paste injector (9), and the tabs (201) of the battery grid (2) are placed at the positions of the convex ring notch (1011) and the locking notch (903).

3. The lead-acid battery plate paste uniformity control processing equipment according to claim 1, characterized in that: The positioning gap (104) is located directly below the location of the raised ring (101), and the vertical cross-section of the positioning gap (104) is an isosceles triangle.

4. The lead-acid battery plate paste uniformity control processing equipment according to claim 1, characterized in that: The output end of the lower lifter (3) is provided with a drive shaft (301), the upper end of the drive shaft (301) is fastened to a reinforcing bracket (4) via a threaded structure, and the support plate (5) is fixedly mounted on the upper side of the reinforcing bracket (4).

5. The lead-acid battery plate paste uniformity control processing equipment according to claim 1, characterized in that: The bottom surface of the paste injector (9) is provided with a convex ring retaining groove (904) that matches the convex ring (101), and the vertical cross-sections of the convex ring (101) and the convex ring retaining groove (904) are isosceles trapezoids.

6. The lead-acid battery plate coating paste uniformity control processing equipment according to claim 1, characterized in that: The top of the paste injector (9) is fixedly connected to a lifting frame (10) connected to the output end of the upper lifter (11), and the center position of the top of the paste injector (9) is connected to a paste injection pipe (905), the paste injection pipe (905) is communicated with the diversion cavity (902) of the paste injector (9), and the upstream of the paste injection pipe (905) is connected to the lead paste supply equipment.

7. A method for controlling the uniformity of lead-acid battery plate paste coating, characterized in that: A lead-acid battery plate coating paste uniformity control processing equipment according to any one of claims 1 to 6, comprising the following contents: Step 1: placing the battery grid (2) in a storage area (102) that does not enter the paste application station by automated equipment; In the second step, when the transmission plate (1) moves forward, the two distance probes (8) both detect the positioning gap (104), and the transmission plate (1) stops moving forward; The lower lifter (3) drives the support plate (5) to move upward until the upper half of the boss (701) is inserted into the lower through hole (103), and then the lower lifter (3) stops driving and locks the position; The upper lifter (11) drives the paste injector (9) to move downward until the paste injector (9) is fully engaged with the raised ring (101), and the upper lifter (11) stops driving and locks the position; In step three, the paste injector (9) continuously applies downward pressure to inject paste into the battery grid (2), and the lead paste evenly enters various positions of the battery grid (2) and moves downward to enter the lower perforation (103); In step 4, when the lead paste in the lower perforation (103) continues to increase, the pressure on the movable plate (7) increases. When the pressure detected by the pressure sensing module (6) increases to a value not lower than a preset reference pressure value, the paste injector (9) stops injecting the paste and is locked. The lower lifter (3) drives the support plate (5) to continue to move upward until the boss (701) is completely inserted into the lower perforation (103), and the lead paste that originally penetrated into the upper area of the lower perforation (103) is pressed into the shelf area (102) and adhered to the surface of the battery grid (2). Step 5: The lower lifter (3) drives the support plate (5) to move downward, driving the boss (701) to completely disengage from the lower through hole (103); Step 6: The upper lifter (11) drives the paste injector (9) to move upward to the upper surface of the battery grid (2) after the paste has been applied; Step 7: The transmission plate (1) drives the battery grid (2) coated with paste to continue moving forward; Step 8: Repeat steps 1 to 7.

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