Process for recovering nickel-hydrogen, nickel-cadmium battery positive pole active substance

A technology for positive electrode active material and nickel-cadmium battery, which is applied in the field of recycling positive electrode active material of batteries, can solve the problems of low utilization rate, large capital investment, cumbersome process and process, simplifies procedures and processes, reduces production costs, simple craftsmanship

Inactive Publication Date: 2008-09-03
郭道传
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above methods can realize to a certain extent the recovery of the positive electrode active material of nickel-metal hydride and nickel-cadmium batteries, but there are the following deficiencies: (1) the recovery method is complicated, the process and process are loaded down with trivial details, and the capital investment is large; (2) the recyclables obtained They are primary raw materials such as nickel sulfate and cobalt sulfate, which need to be purified, and the utilization rate is not high;
[0013] (3) The obtained product cannot be directly applied to the production of batteries, and chemical synthesis by material manufacturers is also required to produce nickel hydroxide and cobalt oxide as battery cathode materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step 1: Collect waste nickel-metal hydride and nickel-cadmium battery positive plates, mainly referring to positive electrode leftovers, fragments, etc., and visually select out the sundries such as paper pieces and metals to ensure that there are no harmful impurities such as iron and copper in the waste plates.

[0038] Step 2: Import the selected positive electrode sheet into a positive electrode grinder for crushing. The power of the grinder is 2KW, and the number of screens is 100 mesh. Generally, it should not be too fine. The crushing time is 60-90 minutes to prevent excessive crushing of foamed nickel and give Subsequent magnetic sieving poses difficulties. It is not allowed to use cast iron inside the pulverizer, it is better to use stainless steel to prevent the mixing ratio of iron elements from exceeding the standard.

[0039] Step 3: Sieve the obtained crushed positive electrode powder, select a 100-mesh sieve, and the main components of the sieved positive...

Embodiment 2

[0043] Step 1: Collect waste nickel-metal hydride and nickel-cadmium battery positive plates, mainly referring to positive electrode leftovers, fragments, etc., and visually select out the sundries such as paper pieces and metals to ensure that there are no harmful impurities such as iron and copper in the waste plates.

[0044] Step 2: Import the selected positive electrode sheet into a positive electrode grinder for crushing. The power of the grinder is 3KW, and the number of screens is 100 mesh. Generally, it should not be too fine. The crushing time is 60-90 minutes to prevent excessive crushing of foamed nickel and give Subsequent magnetic sieving poses difficulties. It is not allowed to use cast iron inside the pulverizer, it is better to use stainless steel to prevent the mixing ratio of iron elements from exceeding the standard.

[0045] Step 3: Sieve the obtained crushed positive electrode powder and select a 200-mesh sieve. The main components of the sieved positive ...

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Abstract

The invention relates to a recovery method for positive active material of ni-mh and ni-cd battery, which has characteristics in including steps as follows: (1) visual sieving positive plate of ni-mh and ni-cd battery; (2) inducing sieved positive plate into positive grinder and grinding; (3) physical particle size sieving sieved positive powder; (4) magnetic sieving positive powder obtained by step (3). The method has advantages in that: (1) the recovery method has simple technology, can complete material recycling only by using grinding, sieving, magnetic sieving, and is easy for operation; (2) the method processes physical recovery and sieving by using material physical property without affecting to material chemical property, and obtained product can be used for producing battery indirectly; (3) the method uses lesser equipments, grinder, sieving net, magnet, and can greatly reduce material production cost.

Description

technical field [0001] The invention relates to a method for recovering positive active materials of batteries, in particular to a method for recovering positive active materials of nickel hydrogen and nickel cadmium batteries. Background technique [0002] In recent years, with the rapid development of microelectronics technology, especially the application of large-scale and ultra-large-scale integrated circuits in broadcasting and television equipment, ENG cameras (camera-recording integration) are small and light, especially in digital equipment. The application of the system makes news editing fast and convenient, greatly shortens the production cycle, and greatly improves the timeliness of news. In order to meet this need, high-performance, large-capacity, light and handy, economical and durable nickel-metal hydride batteries and nickel-cadmium batteries have emerged as the times require. [0003] With the explosive growth of the digital industry, Ni-MH batteries are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54B09B3/00
CPCY02W30/84
Inventor 郭道传杨勃赵宝娟
Owner 郭道传
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