A method for surface treatment of AGM start-stop negative electrode grid

Abstract

A method for treating the surface of the AGM start-stop negative electrode grid. The continuous punching negative electrode grid is placed in a sulfuric acid solution containing lithium phosphate, and then a constant current anodic polarization is performed to form a uniform and stable oxide film on the surface; The oxidized continuous flushing negative electrode grid is then placed in the sulfuric acid solution containing aniline, so that the surface oxide film and aniline undergo a contact reaction to form a uniform and stable dark green activation layer; the continuous flushing negative electrode grid that has undergone the above treatment Put it in a deionized water tank for cleaning, and then put it in a constant temperature and humidity box to dry before it can be used for subsequent filling of lead paste. The negative electrode plate made by the patent of the present invention can significantly improve the bonding force between the negative electrode paste and the grid, significantly reduce the polarization internal resistance, increase the dynamic charge acceptance capacity by more than 20%, and improve the low-temperature high-rate discharge performance by 10%. Above, the durable start-stop cycle life is increased by more than 20%, and the surface treatment process is simple.

Description

technical field

[0001] The invention belongs to the technical field of storage batteries, and relates to the manufacture of rich liquid start-stop lead-acid batteries (EFB), valve-controlled start-stop lead-acid batteries (AGM) and flat power lead-acid batteries, in particular to an AGM start-stop negative plate for batteries The special treatment method of the surface of the grid. Background technique

[0002] Start-stop batteries have high technical requirements for static / dynamic charge acceptance, low-temperature high-rate discharge performance, and start-stop durable cycle life. The quality of negative electrode performance is the key technical link that restricts static / dynamic charge acceptance, low-temperature high-rate discharge performance, and start-stop durability cycle life. There are many traditional ways to improve negative electrode performance, but there are various degrees of defects and disadvantages. The most efficient technical method is to improve the ...

Examples

Embodiment 1

[0032] (A1) Add 11.384Kg of lithium phosphate dihydrate to a container with a density of ρ=1.28g / mL and a volume of 1m 3 Put the sulfuric acid solution in a 1# plastic container, stir well until all the solids are dissolved, and then put the 100Kg negative electrode continuous punching grid into a roll and place it in the above solution for anodic polarization, and the polarization current density is 0.25A / cm 2 , the polarization time is 3.5h;

[0033] (B1) Add 11.641Kg of aniline to a container with a density of ρ=1.28g / mL and a volume of 1m 3 In the 2# plastic container of sulfuric acid solution, fully stir until the aniline is completely dissolved, and then put the negative electrode continuous punching grid after step (A1) for anodic polarization into the above solution for full contact and soaking reaction, and control the temperature in a water bath 45°C, soaking time is 10h, make contact reaction between anodic polarized continuous flushing negative electrode grid surf...

comparative example 1

[0037] The negative electrode plate prepared by using the above-mentioned special treatment on the surface of the negative electrode grid is cured and dried according to the normal production process. The electrochemical performance test and microscopic morphology comparison results of the negative electrode plate are as follows: figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 shown.

[0038] The negative electrode plate was prepared according to the method described in Example 1, and the processes of curing and drying, encapsulation, assembly, and chemical formation were carried out according to the normal production process, and the start-stop battery of the corresponding type was manufactured to test the low-temperature cold start performance at -18°C, and the dynamic charge acceptance. Capacity, start-stop life, the test standard is carried out in accordance with GBT 2666-2016 start-stop lead-acid battery technical conditions, the results are as foll...

Embodiment 2

[0040] (X1) Add 11.392Kg of lithium phosphate dihydrate to a container with a density of ρ=1.28g / mL and a volume of 1m 3 Put the sulfuric acid solution in a 1# plastic container, stir well until all the solids are dissolved, and then put the 100Kg negative electrode continuous punching grid into a roll and place it in the above solution for anodic polarization, and the polarization current density is 0.27A / cm 2 , the polarization time is 4h;

[0041] (X2) Add 11.72Kg of aniline in advance to a container with a density of ρ=1.28g / mL and a volume of 1m 3 In the 2# plastic container of the sulfuric acid solution, fully stir until the aniline is completely dissolved, and then put the negative electrode continuous punching grid after the anodization in the step (X1) into the above solution for full contact and soaking reaction, and the water bath controls the temperature 50℃, immersion time is 8.5h, make contact reaction between anodic polarized continuous flushing negative electr...

technical field

[0001] The invention belongs to the technical field of storage batteries, and relates to the manufacture of rich liquid start-stop lead-acid batteries (EFB), valve-controlled start-stop lead-acid batteries (AGM) and flat power lead-acid batteries, in particular to an AGM start-stop negative plate for batteries The special treatment method of the surface of the grid. Background technique

[0002] Start-stop batteries have high technical requirements for static / dynamic charge acceptance, low-temperature high-rate discharge performance, and start-stop durable cycle life. The quality of negative electrode performance is the key technical link that restricts static / dynamic charge acceptance, low-temperature high-rate discharge performance, and start-stop durability cycle life. There are many traditional ways to improve negative electrode performance, but there are various degrees of defects and disadvantages. The most efficient technical method is to improve the ...

Examples

Embodiment 1

[0032] (A1) Add 11.384Kg of lithium phosphate dihydrate to a container with a density of ρ=1.28g / mL and a volume of 1m 3 Put the sulfuric acid solution in a 1# plastic container, stir well until all the solids are dissolved, and then put the 100Kg negative electrode continuous punching grid into a roll and place it in the above solution for anodic polarization, and the polarization current density is 0.25A / cm 2 , the polarization time is 3.5h;

[0033] (B1) Add 11.641Kg of aniline to a container with a density of ρ=1.28g / mL and a volume of 1m 3 In the 2# plastic container of sulfuric acid solution, fully stir until the aniline is completely dissolved, and then put the negative electrode continuous punching grid after step (A1) for anodic polarization into the above solution for full contact and soaking reaction, and control the temperature in a water bath 45°C, soaking time is 10h, make contact reaction between anodic polarized continuous flushing negative electrode grid surf...

comparative example 1

[0037] The negative electrode plate prepared by using the above-mentioned special treatment on the surface of the negative electrode grid is cured and dried according to the normal production process. The electrochemical performance test and microscopic morphology comparison results of the negative electrode plate are as follows: figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 shown.

[0038] The negative electrode plate was prepared according to the method described in Example 1, and the processes of curing and drying, encapsulation, assembly, and chemical formation were carried out according to the normal production process, and the start-stop battery of the corresponding type was manufactured to test the low-temperature cold start performance at -18°C, and the dynamic charge acceptance. Capacity, start-stop life, the test standard is carried out in accordance with GBT 2666-2016 start-stop lead-acid battery technical conditions, the results are as foll...

Embodiment 2

[0040] (X1) Add 11.392Kg of lithium phosphate dihydrate to a container with a density of ρ=1.28g / mL and a volume of 1m 3 Put the sulfuric acid solution in a 1# plastic container, stir well until all the solids are dissolved, and then put the 100Kg negative electrode continuous punching grid into a roll and place it in the above solution for anodic polarization, and the polarization current density is 0.27A / cm 2 , the polarization time is 4h;

[0041] (X2) Add 11.72Kg of aniline in advance to a container with a density of ρ=1.28g / mL and a volume of 1m 3 In the 2# plastic container of the sulfuric acid solution, fully stir until the aniline is completely dissolved, and then put the negative electrode continuous punching grid after the anodization in the step (X1) into the above solution for full contact and soaking reaction, and the water bath controls the temperature 50℃, immersion time is 8.5h, make contact reaction between anodic polarized continuous flushing negative electr...

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