Treatment process of steel strip for cadmium-nickel storage battery

Abstract

The invention discloses a treatment process of a steel strip for a cadmium-nickel storage battery, and aims to solve the problems of resource waste in a full sintering process and poor slurry adhesiveness, slurry flowing and powder falling in a slurry pulling process in a current electrode processing process, and the treatment process comprises the steps of annealing, leveling, dilute nickel slurry coating, drying treatment, sintering treatment, water cooling and the like. After the steel strip is treated, nickel slurry is evenly attached to the surface of the steel strip, and a layer of nickel powder is evenly attached to the surface of the steel strip through heat treatment, a layer of thin nickel powder is attached to the surface of the nickel-plated steel strip, original steel strip micropores cannot be blocked after low-viscosity nickel slurry coating is conducted, and after sintering, the nickel powder forms honeycomb-shaped protrusions on the surface of the steel strip; according to the technical scheme, a three-dimensional structure is formed on the plane surface of the steel belt, negative electrode slurry substances are effectively fixed, slurry flowing and powder falling are prevented, the quality of a negative electrode substrate in the slurry drawing process is further improved, nickel slurry remaining materials in the full sintering type process are fully utilized, and the resource utilization rate is increased.

Description

Technical Field

[0001] The invention relates to the technical field of cadmium-nickel storage battery processing, in particular to a processing technology of a steel strip for cadmium-nickel storage batteries. Background Art

[0002] The electrode processing techniques for cadmium nickel batteries generally include dry molding, wet molding, bonding, foaming and fiber molding, among which wet molding is further divided into full sintering and semi-sintering.

[0003] The fully sintered type is a process in which the positive and negative electrode substrates are all coated and sintered with nickel paste. It has the advantages of high structural strength and good conductivity. It is mainly used in high-rate and low-temperature scenarios. However, the fully sintered process also has disadvantages such as high cost, heavy weight, and low production efficiency. The semi-sintered type adopts the sintering type for the positive substrate and the slurry pulling type for the negative substrate. It has the characteristics of high production efficiency and low cost, and is mainly used in low-rate and environmentally friendly usage scenarios.

[0004] After the fully sintered negative electrode substrate is processed, the remaining nickel slurry cannot be fully utilized, resulting in waste; while the slurry-drawn negative electrode plate is to coat the negative electrode slurry on the surface of the steel strip. Since the negative electrode slurry contains sponge cadmium, short fibers and other substances, the slurry is relatively thin, resulting in the slurry being rough and having poor adhesion after mixing. If nickel-plated steel strip is used directly, the surface of the steel strip is too smooth, which will lead to slurry flow and falling off during the slurry-drawing process, and the material is not firmly fixed and easy to fall off after punching, resulting in a decline in production quality and a reduction in the yield rate.

[0005] Therefore, the present application provides a processing process for steel strip for cadmium-nickel batteries to meet the needs. Summary of the invention

[0006] The purpose of the present application is to provide a processing technology for steel strip for cadmium-nickel storage batteries, to process the negative electrode plate base strip before slurry drawing, to use fully sintered residual nickel slurry, to improve resource utilization, to enhance the effectiveness of fixing the negative electrode slurry on the surface of the negative electrode plate base strip, to prevent slurry flow and powder shedding, to increase the adhesion amount and adhesion strength of the active material coated on a single electrode piece, thereby improving the processing quality of the substrate surface and the yield rate.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solution: a processing process for steel strip for cadmium-nickel storage batteries, comprising the following steps.

[0008] S1. Annealing: a low-carbon steel strip with a thickness of 0.1 mm is used as the substrate. The steel strip has a speed of 0.5-1.5 m / min and is annealed in an annealing furnace at a temperature of 800-900°C for a time of 80-240 seconds. S2, leveling, the annealed steel strip is leveled by a roller press, and the gap of the roller press is 0.08-0.09mm; S3, coating a dilute nickel slurry, coating the dilute nickel slurry on both sides of the steel strip after leveling, wherein the dilute nickel slurry is composed of the following components by weight: 9-11 parts of dry pulp, 0.9-1.1 parts of hydroxypropyl methylcellulose solution, 0.1 parts of a pore-increasing agent, and 95-105 parts of reverse osmosis water; Dry slurry refers to the nickel slurry residue remaining after the negative electrode base strip is processed in the full sintering process.

[0009] S4, the steel strip coated with the dilute nickel slurry is subjected to multi-stage drying treatment in an infrared vertical drying furnace, and the drying time is 400-1200s; S5. The dried steel strip is sent into a sintering furnace for sintering at a temperature of 800-900°C and a sintering time of 80-240s. S6. Cool the sintered steel strip to room temperature. The thickness of the sintered steel strip is 0.5-0.7 mm, thereby obtaining a steel strip for cadmium-nickel storage batteries.

[0010] Preferably, the infrared vertical drying furnace is segmented, consisting of 5 groups of segmented furnaces. Starting from the entrance end of the steel strip, the temperature in the first group of segmented furnaces is 80-140°C, and the temperature in the second to fifth groups of segmented furnaces is 120-190°C.

[0011] Preferably, the length of the segmented furnace of the infrared vertical drying furnace and the furnaces of the annealing furnace and sintering furnace are all 2m, the steel belt speed is 1.2m / min, the drying time is 500s, and the annealing time and sintering time are both 100s.

[0012] Preferably, the dry pulp consists of the following components by weight: 749-751 parts of nickel powder, 28-30 parts of hydroxypropyl methylcellulose solution, 0.2-0.3 parts of defoaming agent, and 998-1002 parts of reverse osmosis water. The viscosity of the hydroxypropyl methylcellulose solution is 5000-6500 Cp.

[0013] Preferably, the dry pulp is prepared by first preparing a hydroxypropyl methylcellulose solution, then adding a defoaming agent, and finally adding nickel powder.

[0014] Preferably, the pore-increasing agent is pre-foamed hollow microspheres with an average particle size of 20-25 μm.

[0015] Preferably, in S2, the steel strip is flattened and then wound into a tube. In S3, an unwinder is used to unwind the steel strip, and a winder is used to wind the steel strip for traction. Between the unwinder and the winder, the steel strip passes through a scraping table and an infrared vertical drying furnace, a sintering furnace, and a cooling chamber in sequence from front to back.

[0016] Preferably, a scraping table is provided at the bottom of the infrared vertical drying furnace, a mounting opening is provided on the scraping table, a slurry storage bin is provided at the bottom of the mounting opening, a mounting seat is provided on the mounting opening, a scraping mold is installed on the mounting seat, the scraping mold comprises a table top, a coating roller and a clamping roller, a scraping opening is provided on the table top, the bottom of the left and right ends of the scraping opening are rotatably connected with the coating roller through a support arm, the coating roller is located in the slurry storage bin to guide and transport the steel strip, clamping rollers are symmetrically provided on the top of the scraping opening, a scraping gap is left between the two sets of clamping rollers to scrape off excess dilute nickel slurry, and the left and right ends of the two sets of clamping rollers are fixed to the table top by clamps.

[0017] Preferably, a conveying channel which is transparent front to back is provided in the cooling chamber, the interior of the conveying channel is used for the steel strip to pass through, a water cooling chamber is provided outside the middle section of the conveying channel, the water cooling chamber is used to hold cooling water, a water inlet pipe is provided on the top of the water cooling chamber, and return water chambers are symmetrically connected to the left and right ends of the water cooling chamber, the return water chambers are sleeved on the two ends of the conveying channel, and the return water pipes are connected to the return water chambers. The cooling chamber can cool the air in the conveying channel to increase the natural cooling speed of the steel strip.

[0018] Preferably, the temperature of the cooling water is 15-25°C and the length of the cooling water section is 1.6 m.

[0019] In summary, the technical effects and advantages of the present invention are as follows: The present invention uses the nickel slurry residue remaining after the full-sintered negative electrode base strip processing as the main raw material to prepare a dilute nickel slurry. After drying, sintering and other processes, a thin layer of nickel powder is attached to the surface of the nickel-plated steel strip. The low-viscosity nickel slurry will not block the original steel strip micropores after coating. After sintering, the nickel powder forms honeycomb protrusions on the surface of the steel strip, so that a three-dimensional structure is formed on the plane surface of the steel strip. When it is used as a skeleton, the negative electrode material is effectively fixed to prevent slurry flow and powder shedding, and the adhesion amount and adhesion strength of the active material coated on a single electrode piece can be increased, thereby improving the surface quality of the substrate. The nickel slurry residue remaining in the full-sintering process is fully utilized, thereby improving resource utilization, effectively improving product quality without increasing costs, and enhancing the market competitiveness of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the structure of the S3-S6 process of the present invention; Figure 2 This is an enlarged structural schematic diagram of location A of the present invention; Figure 3 It is a right view structural schematic diagram of the S3-S6 process of the present invention; Figure 4 It is a structural schematic diagram of the slurry scraping mold in the present invention; Figure 5 It is a structural schematic diagram of the cooling chamber in the present invention.

[0022] In the figure: 1. unwinder; 2. slurry scraping table; 3. infrared vertical drying furnace; 4. sintering furnace; 5. cooling chamber; 6. winder; 9. steel strip; 20. slurry storage bin; 21. mounting seat; 22. table; 23. slurry coating roller; 24. clamping roller; 25. clamping hoop; 50. conveying channel; 51. water cooling chamber; 52. water return chamber; 53. water inlet pipe; 54. water return pipe. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The nickel powder used in the embodiment is N06# carbonyl nickel powder, the model of the defoaming agent is Foamic-021, the model of the hydroxypropyl methylcellulose is 60HD40000, and the model of the pore-increasing agent is 461WE20.

[0025] Example 1: A processing process for steel strip for cadmium-nickel storage batteries, comprising the following steps.

[0026] S1, annealing, using a steel strip 9 made of low-carbon steel with a thickness of 0.1 mm as the substrate, the steel strip 9 has a running speed of 0.5 m / min, and the steel strip 9 is annealed in an annealing furnace, the length of the annealing furnace is 2 m, the annealing temperature is 800° C., and the annealing time is 240 s; S2, leveling, the annealed steel strip 9 is leveled by a roller press, and the gap of the roller press is 0.08mm; S3, coating a dilute nickel slurry, coating the dilute nickel slurry on both sides of the steel strip 9 after leveling, wherein the dilute nickel slurry is composed of the following components by weight: 0.9 kg dry pulp, 0.09 kg hydroxypropyl methylcellulose solution, 0.01 kg pore-increasing agent, and 9.5 kg reverse osmosis water; S4, the steel strip 9 coated with the dilute nickel slurry is dried in five stages in the infrared vertical drying furnace 3, the length of the segmented furnace of the infrared vertical drying furnace 3 is 2m, starting from the entrance end of the steel strip 9, the first stage drying temperature is 80°C, the second to fifth stages drying temperature is 120°C, and the drying time is 1200s; S5, the dried steel strip 9 is sent into the sintering furnace 4 for sintering treatment, the furnace length of the sintering furnace 4 is 2m, the sintering temperature is 800°C, and the sintering time is 240s; S6. Cool the sintered steel strip 9 to room temperature. The thickness of the sintered steel strip 9 is 0.5 mm, and a steel strip for cadmium-nickel storage battery is obtained.

[0027] As an implementation method in this example, the dry pulp is composed of the following components: 74.9 kg of nickel powder, 2.8 kg of hydroxypropyl methylcellulose, 20 ml of defoaming agent, and 99.8 kg of reverse osmosis water. The viscosity of the hydroxypropyl methylcellulose solution is 5000 Cp.

[0028] As an implementation method in this embodiment, the preparation process of the dry pulp is to first prepare a hydroxypropyl methylcellulose solution, then add a defoaming agent, and finally add nickel powder.

[0029] As an implementation method in this example, the pore-increasing agent is pre-foamed hollow microspheres with an average particle size of 20 μm.

[0030] As an implementation method in this embodiment, in S2, the steel strip 9 is flattened and then wound into a tube. In S3, the unwinder 1 is used to unwind the steel strip 9, and the winder 6 is used to wind the steel strip 9 for traction. Between the unwinder 1 and the winder 6, the steel strip 9 passes through the scraping table 2 and the infrared vertical drying furnace 3, the sintering furnace 4, and the cooling chamber 5 from front to back.

[0031] As an implementation method in this embodiment, a scraping table 2 is provided below the infrared vertical drying furnace 3, and a mounting opening is provided on the scraping table 2. A slurry storage bin 20 is provided at the bottom of the mounting opening, and a mounting seat 21 is provided on the mounting opening. A scraping mold is installed on the mounting seat 21. The scraping mold includes a table top 22, a coating roller 23 and a clamping roller 24. A scraping opening is provided on the table top 22, and the bottoms of the left and right ends of the scraping opening are rotatably connected with the coating roller 23 through a support arm. The coating roller 23 is located in the slurry storage bin 20, and clamping rollers 24 are symmetrically provided front and back on the top of the scraping opening. A scraping gap is left between the two groups of clamping rollers 24, and the left and right ends of the two groups of clamping rollers 24 are fixed to the table top 22 by clamping hoops 25.

[0032] As an implementation method in this embodiment, a conveying channel 50 that is transparent from front to back is provided in the cooling chamber 5. The interior of the conveying channel 50 is used for the steel belt 9 to pass through. A water cooling chamber 51 is provided outside the middle section of the conveying channel 50. The water cooling chamber 51 is used to hold cooling water. A water inlet pipe 53 is provided at the top of the water cooling chamber 51. Return water chambers 52 are symmetrically connected to the left and right ends of the water cooling chamber 51. The return water chambers 52 are sleeved on the two ends of the conveying channel 50, and the return water pipes 54 are connected to the return water chambers 52.

[0033] As an implementation method in this embodiment, the temperature of the cooling water is 15-25° C., and the length of the cooling chamber 5 is 1.6 m.

[0034] Example 2: A processing process for steel strip for cadmium-nickel storage batteries, comprising the following steps.

[0035] S1, annealing, using a steel strip 9 made of low-carbon steel with a thickness of 0.1 mm as the substrate, the steel strip 9 has a running speed of 1.5 m / min, and the steel strip 9 is annealed in an annealing furnace, the length of the annealing furnace is 2 m, the annealing temperature is 900° C., and the annealing time is 80 s; S2, leveling, the annealed steel strip 9 is leveled by a roller press, and the roller press gap is 0.09 mm; S3, coating a dilute nickel slurry, coating the dilute nickel slurry on both sides of the steel strip 9 after leveling, wherein the dilute nickel slurry is composed of the following components by weight: 1.1 kg dry pulp, 0.11 kg hydroxypropyl methylcellulose solution, 0.01 kg pore-increasing agent, and 10.5 kg reverse osmosis water; S4, the steel strip 9 coated with the dilute nickel slurry is dried in five stages in the infrared vertical drying furnace 3, the length of the segmented furnace of the infrared vertical drying furnace 3 is 2m, the drying temperature of the first stage is 140°C, the drying temperature of the second to fifth stages is 190°C, and the drying time is 400s; S5, the dried steel strip 9 is sent into the sintering furnace 4 for sintering treatment, the furnace length of the sintering furnace 4 is 2m, the sintering temperature is 900°C, and the sintering time is 80s; S6. Cool the sintered steel strip 9 to room temperature. The thickness of the sintered steel strip 9 is 0.7 mm, and a steel strip for cadmium-nickel storage batteries is obtained.

[0036] As an implementation method in this example, the dry pulp is composed of the following components: 75.1 kg of nickel powder, 3 kg of hydroxypropyl methylcellulose, 30 ml of defoaming agent, and 100.2 kg of reverse osmosis water. The viscosity of the hydroxypropyl methylcellulose solution is 6500 Cp.

[0037] As an implementation method in this embodiment, the preparation process of the dry pulp is to first prepare a hydroxypropyl methylcellulose solution, then add a defoaming agent, and finally add nickel powder.

[0038] As an implementation method in this example, the pore-increasing agent is pre-foamed hollow microspheres with an average particle size of 25 μm.

[0039] As an implementation method in this embodiment, in S2, the steel strip 9 is flattened and then wound into a tube. In S3, the unwinder 1 is used to unwind the steel strip 9, and the winder 6 is used to wind the steel strip 9 for traction. Between the unwinder 1 and the winder 6, the steel strip 9 passes through the scraping table 2 and the infrared vertical drying furnace 3, the sintering furnace 4, and the cooling chamber 5 from front to back.

[0040] As an implementation method in this embodiment, a scraping table 2 is provided below the infrared vertical drying furnace 3, and a mounting opening is provided on the scraping table 2. A slurry storage bin 20 is provided at the bottom of the mounting opening, and a mounting seat 21 is provided on the mounting opening. A scraping mold is installed on the mounting seat 21. The scraping mold includes a table top 22, a coating roller 23 and a clamping roller 24. A scraping opening is provided on the table top 22, and the bottoms of the left and right ends of the scraping opening are rotatably connected with the coating roller 23 through a support arm. The coating roller 23 is located in the slurry storage bin 20, and clamping rollers 24 are symmetrically provided front and back on the top of the scraping opening. A scraping gap is left between the two groups of clamping rollers 24, and the left and right ends of the two groups of clamping rollers 24 are fixed to the table top 22 by clamping hoops 25.

[0041] As an implementation method in this embodiment, a conveying channel 50 that is transparent from front to back is provided in the cooling chamber 5. The interior of the conveying channel 50 is used for the steel belt 9 to pass through. A water cooling chamber 51 is provided outside the middle section of the conveying channel 50. The water cooling chamber 51 is used to hold cooling water. A water inlet pipe 53 is provided at the top of the water cooling chamber 51. Return water chambers 52 are symmetrically connected to the left and right ends of the water cooling chamber 51. The return water chambers 52 are sleeved on the two ends of the conveying channel 50, and the return water pipes 54 are connected to the return water chambers 52.

[0042] As an implementation method in this embodiment, the temperature of the cooling water is 25° C. and the length of the cooling water section is 1.6 m.

[0043] Example 3: A processing process for steel strip for cadmium-nickel storage batteries, comprising the following steps.

[0044] S1, annealing, using a steel strip 9 made of low-carbon steel with a thickness of 0.1 mm as the substrate, the running speed of the steel strip 9 is 1.2 m / min, and the steel strip 9 is annealed in an annealing furnace, the length of the annealing furnace is 2 m, the annealing temperature is 850° C., and the annealing time is 100 s; S2, leveling, the annealed steel strip 9 is leveled by a roller press, and the roller press gap is 0.85mm; S3, coating a dilute nickel slurry, coating the dilute nickel slurry on both sides of the steel strip 9 after leveling, wherein the dilute nickel slurry is composed of the following components by weight: 1 kg dry pulp, 0.1 kg hydroxypropyl methylcellulose solution, 0.01 kg pore-increasing agent, and 10 kg reverse osmosis water; S4, the steel strip 9 coated with the dilute nickel slurry is dried in five stages in the infrared vertical drying furnace 3, the length of the segmented furnace of the infrared vertical drying furnace 3 is 2m, the drying temperature of the first stage is 140°C, the drying temperature of the second to fifth stages is 190°C, and the drying time is 500s; S5, the dried steel strip 9 is sent into the sintering furnace 4 for sintering treatment. The furnace length of the sintering furnace 4 is 2m, the sintering temperature is 850°C, and the sintering time is 100s; S6. Cool the sintered steel strip 9 to room temperature. The thickness of the sintered steel strip 9 is 0.65 mm, and a steel strip for cadmium-nickel storage batteries is obtained.

[0045] As an implementation method in this example, the dry pulp is composed of the following components: 75 kg of nickel powder, 2.9 kg of hydroxypropyl methylcellulose, 25 ml of defoaming agent, and 100 kg of reverse osmosis water. The viscosity of the hydroxypropyl methylcellulose solution is 5800 Cp.

[0046] As an implementation method in this embodiment, the preparation process of the dry pulp is to first prepare a hydroxypropyl methylcellulose solution, then add a defoaming agent, and finally add nickel powder.

[0047] As an implementation method in this example, the pore-increasing agent is pre-foamed hollow microspheres with an average particle size of 23 μm.

[0048] As an implementation method in this embodiment, in S2, the steel strip 9 is flattened and then wound into a tube. In S3, the unwinder 1 is used to unwind the steel strip 9, and the winder 6 is used to wind the steel strip 9 for traction. Between the unwinder 1 and the winder 6, the steel strip 9 passes through the scraping table 2 and the infrared vertical drying furnace 3, the sintering furnace 4, and the cooling chamber 5 from front to back.

[0049] As an implementation method in this embodiment, a scraping table 2 is provided below the infrared vertical drying furnace 3, and a mounting opening is provided on the scraping table 2. A slurry storage bin 20 is provided at the bottom of the mounting opening, and a mounting seat 21 is provided on the mounting opening. A scraping mold is installed on the mounting seat 21. The scraping mold includes a table top 22, a coating roller 23 and a clamping roller 24. A scraping opening is provided on the table top 22, and the bottoms of the left and right ends of the scraping opening are rotatably connected with the coating roller 23 through a support arm. The coating roller 23 is located in the slurry storage bin 20, and clamping rollers 24 are symmetrically provided front and back on the top of the scraping opening. A scraping gap is left between the two groups of clamping rollers 24, and the left and right ends of the two groups of clamping rollers 24 are fixed to the table top 22 by clamping hoops 25.

[0050] As an implementation method in this embodiment, a conveying channel 50 that is transparent from front to back is provided in the cooling chamber 5. The interior of the conveying channel 50 is used for the steel belt 9 to pass through. A water cooling chamber 51 is provided outside the middle section of the conveying channel 50. The water cooling chamber 51 is used to hold cooling water. A water inlet pipe 53 is provided at the top of the water cooling chamber 51. Return water chambers 52 are symmetrically connected to the left and right ends of the water cooling chamber 51. The return water chambers 52 are sleeved on the two ends of the conveying channel 50, and the return water pipes 54 are connected to the return water chambers 52.

[0051] As an implementation method in this embodiment, the temperature of the cooling water is 20° C. and the length of the cooling water section is 1.6 m.

[0052] Product testing data processed according to the present invention:

[0053] Components not described in detail herein are prior art.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A processing process for a steel strip for a cadmium-nickel storage battery, characterized in that: The following steps are involved: S1, annealing, using a steel strip (9) made of low-carbon steel with a thickness of 0.1 mm as a substrate, the steel strip (9) has a running speed of 0.5-1.5 m / min, and passing the steel strip (9) through an annealing furnace for annealing, the annealing temperature is 800-900° C., and the annealing time is 80-240 s; S2, leveling, the annealed steel strip (9) is leveled by a roller press, and the roller press gap is 0.08-0.09mm; S3, coating a dilute nickel slurry, coating the steel strip (9) with a dilute nickel slurry on both sides after leveling, wherein the dilute nickel slurry is composed of the following components by weight: 9-11 parts of dry pulp, 0.9-1.1 parts of hydroxypropyl methylcellulose solution, 0.1 parts of a pore-increasing agent, and 95-105 parts of reverse osmosis water; S4, the steel strip (9) coated with the dilute nickel slurry is subjected to a multi-stage drying process in an infrared vertical drying furnace (3), the drying time being 400-1200 seconds; S5, the dried steel strip (9) is sent into a sintering furnace (4) for sintering at a temperature of 800-900°C and a sintering time of 80-240s; S6. Cooling the sintered steel strip (9) to room temperature. The thickness of the sintered steel strip (9) is 0.5-0.7 mm, thereby obtaining a steel strip for cadmium-nickel storage batteries.

2. The process for treating a steel strip for a cadmium-nickel storage battery according to claim 1, characterized in that: The infrared vertical drying furnace (3) is of segmented type and consists of five groups of segmented furnace chambers. Starting from the entrance end of the steel strip (9), the temperature in the first group of segmented furnace chambers is 80-140° C., and the temperature in the second to fifth groups of segmented furnace chambers is 120-190° C.

3. The processing technology of a steel strip for cadmium-nickel storage battery according to claim 2, characterized in that: The length of the segmented furnace of the infrared vertical drying furnace (3) and the furnaces of the annealing furnace and the sintering furnace (4) are all 2 m, the speed of the steel strip (9) is 1.2 m / min, the drying time is 500 s, and the annealing time and sintering time are both 100 s.

4. The processing technology of a steel strip for cadmium-nickel storage battery according to claim 1, characterized in that: The dry pulp is composed of the following components by weight: 749-751 parts of nickel powder, 28-30 parts of hydroxypropyl methylcellulose solution, 0.2-0.3 parts of defoaming agent, and 998-1002 parts of reverse osmosis water. The viscosity of the hydroxypropyl methylcellulose solution is 5000-6500 Cp.

5. The processing technology of a steel strip for cadmium-nickel storage battery according to claim 4, characterized in that: The preparation process of dry pulp is to prepare hydroxypropyl methylcellulose solution first, then add defoaming agent, and finally add nickel powder.

6. The processing technology of a steel strip for cadmium-nickel storage battery according to claim 1, characterized in that: The pore-increasing agent adopts pre-foamed hollow microspheres with an average particle size of 20-25 μm.

7. The processing technology of a steel strip for cadmium-nickel storage battery according to claim 1, characterized in that: In S2, the steel strip (9) is flattened and then wound into a tube shape. In S3, the steel strip (9) is unwound by an unwinder (1), and the steel strip (9) is wound by a winder (6) for traction. Between the unwinder (1) and the winder (6), the steel strip (9) passes through a scraping table (2), an infrared vertical drying furnace (3), a sintering furnace (4), and a cooling chamber (5) in sequence from front to back.

8. The process for treating a steel strip for a cadmium-nickel storage battery according to claim 7, characterized in that: A slurry scraping platform (2) is provided below the infrared vertical drying furnace (3). The slurry scraping platform (2) is provided with a mounting opening. A slurry storage bin (20) is provided at the bottom of the mounting opening. A mounting seat (21) is provided on the mounting opening. A slurry scraping mold is installed on the mounting seat (21). The slurry scraping mold comprises a table top (22), a slurry coating roller (23) and a clamping roller (24). The table top (22) is provided with a slurry scraping opening. The bottoms of the left and right ends of the slurry scraping opening are rotatably connected to the slurry coating roller (23) through supporting arms. The slurry coating roller (23) is located in the slurry storage bin (20). Clamping rollers (24) are symmetrically provided at the top of the slurry scraping opening. A slurry scraping gap is left between the two sets of clamping rollers (24). The left and right ends of the two sets of clamping rollers (24) are fixed to the table top (22) through clamps (25).

9. The processing technology of a steel strip for cadmium-nickel storage battery according to claim 7, characterized in that: A conveying channel (50) which is transparent from front to back is provided in the cooling chamber (5). The interior of the conveying channel (50) is used for the steel strip (9) to pass through. A water cooling chamber (51) is provided outside the middle section of the conveying channel (50). The water cooling chamber (51) is used to contain cooling water. A water inlet pipe (53) is provided at the top of the water cooling chamber (51). Return water chambers (52) are symmetrically connected to the left and right ends of the water cooling chamber (51). The return water chambers (52) are sleeved on the two ends of the conveying channel (50). The return water chambers (52) are both connected to return water pipes (54).

10. The process for treating a steel strip for a cadmium-nickel storage battery according to claim 9, characterized in that: The temperature of the cooling water is 15-25°C, and the length of the cooling chamber (5) is 1.6m.

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