A surface treatment method for continuous rolled lead strip

Abstract

The present invention discloses a surface treatment method for a continuous rolled lead strip, aiming to provide a surface treatment method for a continuous rolled lead strip that can simplify the treatment process for increasing the surface roughness of the lead strip, reduce production costs and site space, and is easy to operate and suitable for mass promotion. A surface treatment method for a continuous rolled lead strip adopts a roller mechanism for surface treatment, the roller mechanism includes a roughening roller group, the roughening roller group includes two upper and lower roughening rollers, at least one of the upper and lower roughening rollers is provided with a plurality of protrusions on its surface; the surface treatment method for a continuous rolled lead strip comprises the following steps, the continuous rolled lead strip passes through the upper and lower roughening rollers, during which the protrusions form a plurality of pits on the surface of the continuous rolled lead strip to increase the surface roughness of the continuous rolled lead strip.

Description

Technical Field

[0001] The invention relates to the field of lead-acid battery grid manufacturing, and in particular to a surface treatment method for a continuously rolled lead strip. Background Art

[0002] At present, the manufacturing processes of lead-acid battery grids mainly include gravity casting, mesh drawing, and continuous rolling and punching. Among them, the grids produced by the gravity casting process have the problems of heavy weight of single-piece grids, low corrosion resistance, low production efficiency, large impact of labor on output, and high production cost; the grids produced by the mesh drawing process are light in weight, high in output, and strong in corrosion resistance, but the grids have no left and right borders, and short circuit after creep causes the battery to end its life prematurely; the grids produced by the continuous rolling and punching process are light in weight, good consistency in grid thickness and weight, high in mechanical strength, high in production efficiency, independent of labor, and low in production cost, which has gradually become the mainstream method of grid manufacturing.

[0003] Although the grid produced by continuous rolling and punching process has many advantages, the lead strip is rolled many times to reach the designed thickness during the continuous rolling process, and the surface of the lead strip is very smooth. Therefore, special processing is required to increase the surface roughness of the lead strip before the grid can be made. Currently, there are mainly ultrasonic treatment and chemical corrosion methods.

[0004] Ultrasonic treatment mainly uses sound waves of specific frequency and power to treat the surface of the rolled lead strip to increase the surface roughness of the lead strip. This treatment method is simple to operate, but it requires the addition of ultrasonic equipment, which increases costs, occupies space, consumes a lot of energy, and is noisy.

[0005] The chemical corrosion method mainly uses specific chemical agents to corrode the surface of the lead strip to increase the surface roughness of the lead strip. This treatment method consumes a large amount of chemical agents, increases the amount of wastewater treatment, and the lead strip needs to be cleaned and dried after treatment, which requires additional equipment, occupies space, and increases production costs.

[0006] In view of this, it is urgent to develop a simple and efficient lead tape processing method. Summary of the invention

[0007] The purpose of the present invention is to provide a surface treatment method for continuous rolled lead strip which can simplify the treatment process for increasing the surface roughness of the lead strip, reduce production costs and site occupation space, and is easy to operate and suitable for large-scale promotion.

[0008] The technical solution of the present invention is:

[0009] A method for surface treatment of a continuous rolled lead strip, wherein the surface treatment is performed using a roller mechanism, wherein the roller mechanism comprises a roughening roller group, wherein the roughening roller group comprises two upper and lower roughening rollers, wherein at least one of the upper and lower roughening rollers has a plurality of protrusions on its surface;

[0010] The surface treatment method of the continuous rolled lead strip includes the following steps: the continuous rolled lead strip passes through two upper and lower roughening rollers. During this process, the protrusions form a number of pits on the surface of the continuous rolled lead strip to increase the surface roughness of the continuous rolled lead strip.

[0011] The continuous rolled lead strip is made by a rolling process. During the rolling process, the lead strip passes through several rollers, each of which includes two upper and lower rollers. After multiple rolling processes, the lead strip reaches the designed thickness. The roughening roller group of the roller mechanism of the present scheme can be directly arranged after each roller in the rolling process, and the continuously rolled lead strip directly enters the roughening roller group after rolling, and a number of pits are formed on the surface of the continuously rolled lead strip by the convex blocks to increase the surface roughness of the continuously rolled lead strip; or the roughening roller group of the roller mechanism directly transforms the last roller in the rolling process, and the upper and lower rollers of the last roller are transformed into the upper and lower roughening rollers of the present scheme, and in the process of the continuously rolled lead strip passing through the last roller (i.e., the roughening roller group of the present scheme), the convex blocks form a number of pits on the surface of the continuously rolled lead strip to increase the surface roughness of the continuously rolled lead strip; in this way, the process of increasing the surface roughness of the lead strip can be completed simultaneously in the rolling process of the continuously rolled lead strip, without the need to separately add an ultrasonic treatment method or a chemical corrosion method to increase the surface roughness of the lead strip, thereby simplifying the treatment process of increasing the surface roughness of the lead strip, reducing production costs and site occupation space, and is easy to operate, suitable for large-scale promotion.

[0012] Preferably, the convex blocks are embedded on the surface of the roughening roller, so that the convex blocks on the roughening roller can be easily installed and manufactured.

[0013] Preferably, the bump is made of diamond, so as to ensure the hardness of the bump so that the bump can be easily pressed into the lead strip and form a pit.

[0014] Preferably, the side of the projection is provided with a draft angle, so that the projection can be easily demoulded after being pressed into the lead strip.

[0015] Preferably, the height of the bump is 20-50 μm.

[0016] Preferably, the protrusions are evenly arranged and distributed on the outer peripheral surface of the roughening roller, so that evenly distributed pits can be formed on the surface of the continuous rolled lead strip to increase the surface roughness of the continuous rolled lead strip.

[0017] A method for surface treatment of a continuous rolled lead strip, wherein the surface treatment is performed using a roller mechanism, wherein the roller mechanism comprises a roughening roller group and a corrugating roller group, wherein the roughening roller group comprises two upper and lower roughening rollers, wherein at least one of the upper and lower roughening rollers has a plurality of protrusions on its surface; wherein the corrugating roller group comprises two upper and lower corrugating rollers, wherein the outer surface of the corrugating roller is a smooth surface,

[0018] The surface treatment method of a continuous rolled lead strip comprises the following steps: the continuous rolled lead strip passes through a roughening roller group and a wrinkling roller group in sequence; in the process of the continuous rolled lead strip passing through the upper and lower roughening rollers of the roughening roller group, the convex blocks form a plurality of pits on the surface of the continuous rolled lead strip to increase the surface roughness of the continuous rolled lead strip;

[0019] When the continuously rolled lead strip passes through the upper and lower corrugated rollers of the corrugated roller group, the continuously rolled lead strip is squeezed by the upper and lower corrugated rollers so that curved wrinkles are formed on the inner wall surfaces of the pits on the surface of the continuously rolled lead strip.

[0020] The continuously rolled lead strip is made by a rolling process. During the rolling process, the lead strip passes through several rollers, each of which includes two upper and lower rollers. The lead strip reaches the designed thickness after multiple rolling. The roughening roller group and the wrinkling roller group of the roller mechanism of this scheme can be directly arranged after each roller in the rolling process. The continuously rolled lead strip directly enters the roughening roller group and the wrinkling roller group after rolling. Several pits are formed on the surface of the continuously rolled lead strip through the protrusions to increase the surface roughness of the continuously rolled lead strip; then the continuously rolled lead strip is squeezed by the upper and lower rollers to form curved wrinkles on the inner wall surfaces of the pits on the surface of the continuously rolled lead strip; or the roughening roller group of the roller mechanism directly transforms the last two rollers in the rolling process, and the upper and lower rollers of the second-to-last roller are transformed into the upper and lower roughening rollers of this scheme, and the upper and lower rollers of the last roller are transformed into the upper and lower roughening rollers of this scheme. The two pressing rollers can directly constitute the upper and lower wrinkle-increasing pressing rollers of the present scheme. After the continuously rolled lead strip passes through the last two pressing rollers of the rolling process, a number of pits are formed on the surface of the continuously rolled lead strip through the protrusions to increase the surface roughness of the continuously rolled lead strip and form curved wrinkles on the inner wall surfaces of the pits on the surface of the continuously rolled lead strip. In this way, the process of increasing the surface roughness of the lead strip can be completed simultaneously in the rolling process of the continuously rolled lead strip, without the need to separately add an ultrasonic treatment method or a chemical corrosion method to increase the surface roughness of the lead strip, thereby simplifying the treatment process of increasing the surface roughness of the lead strip, reducing production costs and site occupation space, and is easy to operate, suitable for large-scale promotion.

[0021] On the other hand, the surface treatment method of the continuous rolled lead strip in this scheme not only forms a number of pits on the surface of the continuous rolled lead strip; but also squeezes the continuous rolled lead strip by the upper roller and the lower roller through the wrinkle pressing roller group, so that the inner wall surface of the pits on the surface of the continuous rolled lead strip forms curved wrinkles; in this way, the contact area between the pits and the active materials in the pits can be effectively increased, the combination is more reliable, and it is beneficial to further extend the battery cycle life.

[0022] Preferably, the convex blocks are embedded in the surface of the roughening roller, so that the convex blocks on the roughening roller can be easily installed and manufactured.

[0023] Preferably, the bump is made of diamond, so as to ensure the hardness of the bump so that the bump can be easily pressed into the lead strip and form a pit.

[0024] Preferably, the side of the bump is provided with a draft angle, and the height of the bump is 20-50 μm, so that the bump can be smoothly demolded after being pressed into the lead tape.

[0025] The beneficial effects of the present invention are: it can simplify the treatment process of increasing the surface roughness of the lead strip, reduce production costs and site occupation space, and is easy to operate and suitable for large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the roughening pressure roller of the pressure roller mechanism of the present invention.

[0027] Figure 2 It is a structural schematic diagram of the application of the pressing roller mechanism of the specific embodiment 1 in each pressing roller of the rolling process of the continuous rolling lead strip.

[0028] Figure 3 It is a structural schematic diagram of the application of the pressing roller mechanism of the specific embodiment 2 in each pressing roller in the rolling process of the continuous rolling lead strip.

[0029] In the figure:

[0030] Roughening roller 1, convex block 1.1;

[0031] Continuous rolling lead strip 2;

[0032] Rolling roller 3;

[0033] Crease roller 4. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0035] Specific embodiment 1, as Figure 1 , Figure 2 As shown, a surface treatment method for a continuous rolled lead strip is performed using a roller mechanism. The roller mechanism includes a roughening roller group. The roughening roller group includes two upper and lower roughening rollers 1. At least one of the upper and lower roughening rollers is provided with a plurality of bumps 1.1 on its surface. In this embodiment, a plurality of bumps are provided on the surfaces of both the upper and lower roughening rollers. The bumps in this embodiment are small bumps, which are used to form a plurality of pits on the surface of the continuous rolled lead strip to increase the surface roughness of the continuous rolled lead strip.

[0036] The surface treatment method of the continuous rolled lead strip comprises the following steps: the continuous rolled lead strip 2 passes through two upper and lower roughening rollers 1. During this process, the protrusions 1.1 form a plurality of pits on the surface of the continuous rolled lead strip to increase the surface roughness of the continuous rolled lead strip.

[0037] In one implementation of this embodiment, Figure 2As shown, the roughening roller group of the roller mechanism is directly arranged after each rolling roller 3 of the rolling process for making the continuously rolled lead strip (the continuously rolled lead strip is made by a rolling process, and the lead strip passes through several rolling rollers during the rolling process, each rolling roller includes two upper and lower rollers, and the lead strip reaches the designed thickness after multiple rolling). In this way, the surface roughness increasing process of the lead strip can be completed simultaneously in the rolling process of the continuously rolled lead strip, and there is no need to separately add an ultrasonic treatment method or a chemical corrosion method to increase the surface roughness of the lead strip, thereby simplifying the surface roughness increasing treatment process of the lead strip, reducing production costs and site occupation space, and is easy to operate, suitable for large-scale promotion.

[0038] In another implementation of this embodiment, Figure 2 As shown, the roughening roller group of the roller mechanism is transformed into the upper and lower rollers of the last rolling roller in the rolling process of the continuous rolling lead strip (the continuous rolling lead strip is made by the rolling process, and the lead strip passes through several rolling rollers during the rolling process, each rolling roller includes two upper and lower rollers, and the lead strip reaches the designed thickness after multiple rolling), and the upper and lower rollers of the last rolling roller are transformed into the upper and lower roughening rollers of this scheme. When the continuous rolling lead strip passes through the last rolling roller (i.e., the roughening roller group of this scheme), the convex block forms several pits on the surface of the continuous rolling lead strip to increase the surface roughness of the continuous rolling lead strip; in this way, the surface roughness increasing process of the lead strip can be completed simultaneously in the continuous rolling lead strip rolling process, and there is no need to add an ultrasonic treatment method or a chemical corrosion method to increase the surface roughness of the lead strip separately, thereby simplifying the surface roughness increasing process of the lead strip, reducing production costs and site occupation space, and is easy to operate, suitable for mass promotion.

[0039] Specifically, Figure 1 As shown, the bumps are made of diamond. The bumps are embedded on the surfaces of the upper and lower roughening rollers. This makes it easy to install and manufacture the bumps on the roughening rollers; at the same time, the hardness of the bumps is ensured so that the bumps can be easily pressed into the lead belt and form pits.

[0040] The bumps are evenly arranged and distributed on the outer circumference of the roughening roller. Each row of bumps in the roughening roller includes 20-30 bumps, and the bumps in the same row of the roughening roller are evenly distributed in the axial direction of the roughening roller. There are 30-40 rows of bumps distributed in the circumferential direction of the roughening roller. In this way, evenly distributed pits can be formed on the surface of the continuous rolled lead strip to increase the surface roughness of the continuous rolled lead strip.

[0041] The side of the bump is provided with a draft angle. In this way, the bump can be easily demolded after being pressed into the lead tape. In this embodiment, the bump is trapezoidal. The top edge of the bump is provided with a rounded corner, and the rounded corner radius is 2-5 μm. The height of the bump is 20-50 μm. The cross-sectional area of ​​the top of the bump is 100-250 square microns. The cross-sectional area of ​​the bottom of the bump is 300-500 square microns.

[0042] The surface roughness Ra of the continuous rolled lead strip treated by the surface treatment method of the continuous rolled lead strip of the present embodiment increases from 2 μm to 4-6 μm. The specific situation fluctuates due to the distribution of the compacts.

[0043] Compared with the grid made of continuous rolled lead strip with untreated surface and the continuous rolled lead strip treated by a surface treatment method of a continuous rolled lead strip in this embodiment, when the weight, size and amount of paste of the grid are the same, after the plate is cured and the lead paste is removed and weighed, the amount of active substance attached to the surface of the grid is 1.05g and 4.2g respectively. This indicates that the contact area between the surface of the grid made of the continuous rolled lead strip treated by a surface treatment method of a continuous rolled lead strip in this embodiment and the active substance is larger, the bonding is more reliable, and it is beneficial to extend the cycle life of the battery.

[0044] In addition, the grids made of the untreated continuous rolled lead strip and the continuous rolled lead strip treated by the surface treatment method of the continuous rolled lead strip of the present embodiment are used to produce batteries according to the same process, and the battery cycle test is carried out by the same charge and discharge process. After the battery cycle fails, the number of cycles is recorded respectively. The battery is disassembled, the active material attached to the grid is removed, and the corrosion layer on the surface of the grid is removed with a sugar alkali solution. The treated grid is weighed, and the average grid corrosion rate is obtained by dividing the reduced weight of the grid by the number of cycles, which is 0.02g / time and 0.012g / time respectively. This shows that after the grid is made of the continuous rolled lead strip treated by the surface treatment method of the continuous rolled lead strip of the present embodiment, the grid corrosion rate is reduced and the battery cycle life is extended.

[0045] The surface treatment method of a continuous rolling lead strip of this embodiment is applicable to grids of different types and sizes, and can be used to manufacture electric power-assisted vehicle batteries, electric road vehicle batteries, and energy storage batteries. After being put into use in batches, the operation is simple, and the surface roughness increase treatment process of the lead strip can be simplified, reducing production costs and site occupation space. It can increase the amount of active substances attached to the grid surface, reduce the grid corrosion rate, extend the battery cycle life, and reduce the battery production cost.

[0046] Specific embodiment 2, as Figure 1 , Figure 3 As shown, a surface treatment method for a continuous rolled lead strip is performed using a roller mechanism. The roller mechanism includes a roughening roller group and a wrinkling roller group. The roughening roller group includes two upper and lower roughening rollers 1. At least one of the upper and lower roughening rollers is provided with a plurality of bumps 1.1 on its surface. In this embodiment, a plurality of bumps are provided on the surfaces of both the upper and lower roughening rollers. The bumps in this embodiment are small bumps, which are used to form a plurality of pits on the surface of the continuous rolled lead strip to increase the surface roughness of the continuous rolled lead strip.

[0047] The corrugation roller group comprises two upper and lower corrugation rollers 4, and the outer surfaces of the corrugation rollers are smooth surfaces;

[0048] The surface treatment method of a continuous rolled lead strip comprises the following steps: the continuous rolled lead strip 2 passes through a roughening roller group and a corrugating roller group in sequence, the continuous rolled lead strip first passes through the roughening roller group, and then passes through the corrugating roller group. In the process of the continuous rolled lead strip passing through the upper and lower roughening rollers of the roughening roller group, the convex blocks form a plurality of pits on the surface of the continuous rolled lead strip to increase the surface roughness of the continuous rolled lead strip. In the process of the continuous rolled lead strip passing through the upper and lower corrugating rollers of the corrugating roller group, the continuous rolled lead strip is squeezed by the upper roller and the lower roller, so that the inner wall surface of the pit on the surface of the continuous rolled lead strip forms curved wrinkles.

[0049] In one implementation of this embodiment, Figure 3 As shown, the roughening roller group and the wrinkling roller group of the roller mechanism are directly arranged after each rolling roller 3 of the rolling process for making the continuously rolled lead strip (the continuously rolled lead strip is made by a rolling process, and the lead strip passes through several rolling rollers during the rolling process, each rolling roller includes two upper and lower rollers, and the lead strip reaches the designed thickness after multiple rolling). In this way, the surface roughness increasing process of the lead strip can be completed simultaneously in the rolling process of the continuously rolled lead strip, and there is no need to separately add an ultrasonic treatment method or a chemical corrosion method to increase the surface roughness of the lead strip, thereby simplifying the surface roughness increasing treatment process of the lead strip, reducing production costs and site occupation space, and is easy to operate, suitable for large-scale promotion.

[0050] In another implementation of this embodiment, Figure 3 As shown, the roughening roller group of the roller mechanism is transformed by modifying the last two rolling rollers 3 in the rolling process of the continuous rolled lead strip (the continuous rolled lead strip is made by a rolling process, and the lead strip passes through several rolling rollers during the rolling process, each rolling roller includes two upper and lower rollers, and the lead strip reaches the designed thickness after multiple rolling), and the upper and lower rollers of the second to last rolling roller are transformed into the upper and lower roughening rollers of this scheme, and the upper and lower rollers of the last rolling roller can directly constitute the upper and lower wrinkling rollers of this scheme. After the continuous rolled lead strip passes through the last two rolling rollers of the rolling process, a number of pits are formed on the surface of the continuous rolled lead strip through the protrusions to increase the surface roughness of the continuous rolled lead strip and form curved wrinkles on the inner wall surfaces of the pits on the surface of the continuous rolled lead strip. In this way, the process of increasing the surface roughness of the lead strip can be completed simultaneously in the rolling process of the continuous rolled lead strip, without the need to separately add an ultrasonic treatment method or a chemical corrosion method to increase the surface roughness of the lead strip, thereby simplifying the process of increasing the surface roughness of the lead strip, reducing production costs and site space occupied, and is easy to operate and suitable for large-scale promotion.

[0051] On the other hand, in the surface treatment method of the continuous rolled lead strip in this embodiment, not only a number of pits are formed on the surface of the continuous rolled lead strip; but also the continuous rolled lead strip is squeezed by the upper roller and the lower roller through the wrinkle pressing roller group, so that the inner wall surfaces of the pits on the surface of the continuous rolled lead strip form curved wrinkles; in this way, the contact area between the pits and the active materials in the pits can be effectively increased, the combination is more reliable, and it is beneficial to further extend the battery cycle life.

[0052] Specifically, the bumps are made of diamonds. The bumps are embedded on the surfaces of the upper and lower roughening rollers. In this way, it is convenient to install and manufacture the bumps on the roughening rollers; at the same time, the hardness of the bumps is ensured so that the bumps can be easily pressed into the lead belt and form pits.

[0053] The bumps are evenly arranged and distributed on the outer circumference of the roughening roller. Each row of bumps in the roughening roller includes 20-30 bumps, and the bumps in the same row of the roughening roller are evenly distributed in the axial direction of the roughening roller. There are 30-40 rows of bumps distributed in the circumferential direction of the roughening roller. In this way, evenly distributed pits can be formed on the surface of the continuous rolled lead strip to increase the surface roughness of the continuous rolled lead strip.

[0054] The side of the bump is provided with a draft angle. In this way, the bump can be easily demolded after being pressed into the lead tape. In this embodiment, the bump is trapezoidal. The top edge of the bump is provided with a rounded corner, and the rounded corner radius is 2-5 μm. The height of the bump is 20-50 μm. The cross-sectional area of ​​the top of the bump is 100-250 square microns. The cross-sectional area of ​​the bottom of the bump is 300-500 square microns.

[0055] The surface roughness Ra of the continuous rolled lead strip treated by the surface treatment method of the continuous rolled lead strip of the present embodiment increases from 2 μm to 4-6 μm. The specific situation fluctuates due to the distribution of the compacts.

[0056] Compared with the grid made of continuous rolled lead strip with untreated surface and the continuous rolled lead strip treated by a surface treatment method of a continuous rolled lead strip in this embodiment, when the weight, size and amount of paste of the grid are the same, after the plate is cured and the lead paste is removed and weighed, the amount of active substance attached to the surface of the grid is 1.05g and 4.2g respectively. This indicates that the contact area between the surface of the grid made of the continuous rolled lead strip treated by a surface treatment method of a continuous rolled lead strip in this embodiment and the active substance is larger, the bonding is more reliable, and it is beneficial to extend the cycle life of the battery.

[0057] In addition, the grids made of the untreated continuous rolled lead strip and the continuous rolled lead strip treated by the surface treatment method of the continuous rolled lead strip of the present embodiment are used to produce batteries according to the same process, and the battery cycle test is carried out by the same charge and discharge process. After the battery cycle fails, the number of cycles is recorded respectively. The battery is disassembled, the active material attached to the grid is removed, and the corrosion layer on the surface of the grid is removed with a sugar alkali solution. The treated grid is weighed, and the average grid corrosion rate is obtained by dividing the reduced weight of the grid by the number of cycles, which is 0.02g / time and 0.012g / time respectively. This shows that after the grid is made of the continuous rolled lead strip treated by the surface treatment method of the continuous rolled lead strip of the present embodiment, the grid corrosion rate is reduced and the battery cycle life is extended.

[0058] The surface treatment method of a continuous rolling lead strip of this embodiment is applicable to grids of different types and sizes, and can be used to manufacture electric power-assisted vehicle batteries, electric road vehicle batteries, and energy storage batteries. After being put into use in batches, the operation is simple, and the surface roughness increase treatment process of the lead strip can be simplified, reducing production costs and site occupation space. It can increase the amount of active substances attached to the grid surface, reduce the grid corrosion rate, extend the battery cycle life, and reduce the battery production cost.

[0059] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A method for surface treatment of a continuously rolled lead strip, characterized in that: A roller mechanism is used for surface treatment, the roller mechanism includes a roughening roller group and a wrinkling roller group, the roughening roller group includes two upper and lower roughening rollers, at least one of the upper and lower roughening rollers has a plurality of protrusions on its surface; the wrinkling roller group includes two upper and lower wrinkling rollers, the outer surface of the wrinkling roller is a smooth surface; The surface treatment method of a continuous rolled lead strip comprises the following steps: the continuous rolled lead strip passes through a roughening roller group and a wrinkling roller group in sequence; in the process of the continuous rolled lead strip passing through the upper and lower roughening rollers of the roughening roller group, the convex blocks form a plurality of pits on the surface of the continuous rolled lead strip to increase the surface roughness of the continuous rolled lead strip; When the continuously rolled lead strip passes through the upper and lower corrugated rollers of the corrugated roller group, the continuously rolled lead strip is squeezed by the upper and lower corrugated rollers so that curved wrinkles are formed on the inner wall surfaces of the pits on the surface of the continuously rolled lead strip.

2. A method for surface treatment of a continuous rolled lead strip according to claim 1, characterized in that: The convex blocks are embedded in the surface of the roughened pressing roller.

3. A method for surface treatment of a continuous rolled lead strip according to claim 2, characterized in that: The bumps are made of diamond.

4. A method for surface treatment of a continuous rolled lead strip according to claim 1, 2 or 3, characterized in that: The side surface of the protrusion is provided with a draft angle.

5. A method for surface treatment of a continuous rolled lead strip according to claim 1, 2 or 3, characterized in that: The height of the bump is 20-50 μm.

6. A method for surface treatment of a continuous rolled lead strip according to claim 1, 2 or 3, characterized in that: The convex blocks are evenly arranged and distributed on the outer peripheral surface of the roughening roller.

7. A method for surface treatment of a continuous rolled lead strip according to claim 1, 2 or 3, characterized in that: The projection is trapezoidal.

8. A method for surface treatment of a continuously rolled lead strip according to claim 1, 2 or 3, characterized in that: The top edge of the protrusion is provided with a rounded corner.

9. A method for surface treatment of a continuously rolled lead strip according to claim 8, characterized in that: The fillet radius is 2-5 μm.

10. A method for surface treatment of a continuously rolled lead strip according to claim 1, 2 or 3, characterized in that: The cross-sectional area of ​​the top of the bump is 100-250 square microns, and the cross-sectional area of ​​the bottom of the bump is 300-500 square microns.

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