A positive electrode additive for improving the service life of valve-regulated sealed lead-acid battery and its application

Abstract

The invention relates to the technical field of lead-acid batteries, provides a positive electrode additive for improving the service life of a valve-regulated sealed lead-acid battery and its application, and solves the problem that a high-impedance layer is prone to appear in the interface layer between grid alloy and battery active material in the prior art, The problem of shortening the service life of the valve-regulated sealed lead-acid battery, the positive electrode additive includes the following raw materials by mass fraction: 35-45% bismuth oxide, 8-12% polypropylene fiber, 28-32% tetrabasic lead sulfate, 18 ~24% diatomite, the positive electrode additive is used to prepare lead paste, and the preparation of lead paste includes the following steps: 1) Weigh lead powder and positive electrode additive, add them into the paste machine and stir for 6-10 min; Add deionized water to the mixing machine, stir and mix for 5-8 minutes; 3) Add sulfuric acid to the mixing machine, control the acid addition speed, add acid for 15 minutes, continue stirring for 10-15 minutes, then open the cooling system of the mixing machine, cool down Cream after.

Description

technical field

[0001] The invention relates to the technical field of lead-acid batteries, in particular to a positive electrode additive for improving the service life of a valve-regulated sealed lead-acid battery and its application. Background technique

[0002] Lead-acid batteries occupy a solid position in most traditional fields and some emerging application fields by virtue of a series of advantages such as stable voltage characteristics, large single battery capacity, high safety, abundant and renewable raw materials, and low prices. . The existing lead-acid batteries are generally valve-regulated sealed lead-acid batteries, which realize the sealing and maintenance-free structure of the battery. In order to achieve breakthroughs in the performance and production cost of lead-acid batteries, researchers have done a lot of work. For example, Chinese Patent No.: 201610042353.7 discloses a deep-cycle valve-regulated lead-acid battery and its preparation method, includ...

Examples

Embodiment 1

[0022] An application of a positive electrode additive for improving the service life of a valve-regulated sealed lead-acid battery, the positive electrode additive is used to prepare lead paste, and the lead paste is composed of the following parts by weight of each raw material: 80 parts of lead powder (content of lead oxide 71wt%), 1.25 parts of positive additive, 7 parts of sulfuric acid (density is 1.40g / cm 3 ), 9 parts of deionized water, the positive electrode additive includes the following mass fractions of each raw material: 35% bismuth oxide, 12% polypropylene fiber, 30% tetrabasic lead sulfate, 23% diatomaceous earth, the lead paste is The preparation steps are as follows:

[0023] S1: Weigh lead powder and positive electrode additives, add them into the paste machine and stir and mix for 6 minutes;

[0024] S2: Add enough deionized water to the blender, stir and mix for 5min;

[0025] S3: Add sulfuric acid into the mixing paste machine, control the speed of addi...

Embodiment 2

[0029] An application of a positive electrode additive for improving the service life of a valve-regulated sealed lead-acid battery, the positive electrode additive is used for preparing lead paste, and the lead paste is composed of the following raw materials in parts by weight: 85 parts of lead powder (content of lead oxide 71wt%), 2.5 parts of positive electrode additives, 8 parts of sulfuric acid (density is 1.40g / cm 3 ), 10 parts of deionized water, the positive electrode additive includes the following raw materials by mass fraction: 40% bismuth oxide, 10% polypropylene fiber, 32% tetrabasic lead sulfate, 18% diatomaceous earth, the lead paste is The preparation steps are as follows:

[0030] S1: Weigh lead powder and positive electrode additives, add them into the paste machine and stir and mix for 8min;

[0031] S2: Add enough deionized water to the blender, stir and mix for 6min;

[0032] S3: Add sulfuric acid into the mixing paste machine, control the speed of addi...

Embodiment 3

[0036] An application of a positive electrode additive for improving the service life of a valve-regulated sealed lead-acid battery, the positive electrode additive is used to prepare lead paste, and the lead paste is composed of the following parts by weight of each raw material: 90 parts of lead powder (content of lead oxide 71wt%), 3.5 parts of positive electrode additives, 10 parts of sulfuric acid (density is 1.40g / cm 3 ), 12 parts of deionized water, the positive electrode additive includes the following raw materials in mass fractions: 45% bismuth oxide, 8% polypropylene fiber, 28% tetrabasic lead sulfate, 19% diatomaceous earth, the lead paste is The preparation steps are as follows:

[0037] S1: Weigh lead powder and positive electrode additives, add them into the paste machine and stir and mix for 10min;

[0038] S2: Add enough deionized water to the blender, stir and mix for 8min;

[0039] S3: Add sulfuric acid into the mixing paste machine, control the speed of a...

technical field

[0001] The invention relates to the technical field of lead-acid batteries, in particular to a positive electrode additive for improving the service life of a valve-regulated sealed lead-acid battery and its application. Background technique

[0002] Lead-acid batteries occupy a solid position in most traditional fields and some emerging application fields by virtue of a series of advantages such as stable voltage characteristics, large single battery capacity, high safety, abundant and renewable raw materials, and low prices. . The existing lead-acid batteries are generally valve-regulated sealed lead-acid batteries, which realize the sealing and maintenance-free structure of the battery. In order to achieve breakthroughs in the performance and production cost of lead-acid batteries, researchers have done a lot of work. For example, Chinese Patent No.: 201610042353.7 discloses a deep-cycle valve-regulated lead-acid battery and its preparation method, includ...

Examples

Embodiment 1

[0022] An application of a positive electrode additive for improving the service life of a valve-regulated sealed lead-acid battery, the positive electrode additive is used to prepare lead paste, and the lead paste is composed of the following parts by weight of each raw material: 80 parts of lead powder (content of lead oxide 71wt%), 1.25 parts of positive additive, 7 parts of sulfuric acid (density is 1.40g / cm 3 ), 9 parts of deionized water, the positive electrode additive includes the following mass fractions of each raw material: 35% bismuth oxide, 12% polypropylene fiber, 30% tetrabasic lead sulfate, 23% diatomaceous earth, the lead paste is The preparation steps are as follows:

[0023] S1: Weigh lead powder and positive electrode additives, add them into the paste machine and stir and mix for 6 minutes;

[0024] S2: Add enough deionized water to the blender, stir and mix for 5min;

[0025] S3: Add sulfuric acid into the mixing paste machine, control the speed of addi...

Embodiment 2

[0029] An application of a positive electrode additive for improving the service life of a valve-regulated sealed lead-acid battery, the positive electrode additive is used for preparing lead paste, and the lead paste is composed of the following raw materials in parts by weight: 85 parts of lead powder (content of lead oxide 71wt%), 2.5 parts of positive electrode additives, 8 parts of sulfuric acid (density is 1.40g / cm 3 ), 10 parts of deionized water, the positive electrode additive includes the following raw materials by mass fraction: 40% bismuth oxide, 10% polypropylene fiber, 32% tetrabasic lead sulfate, 18% diatomaceous earth, the lead paste is The preparation steps are as follows:

[0030] S1: Weigh lead powder and positive electrode additives, add them into the paste machine and stir and mix for 8min;

[0031] S2: Add enough deionized water to the blender, stir and mix for 6min;

[0032] S3: Add sulfuric acid into the mixing paste machine, control the speed of addi...

Embodiment 3

[0036] An application of a positive electrode additive for improving the service life of a valve-regulated sealed lead-acid battery, the positive electrode additive is used to prepare lead paste, and the lead paste is composed of the following parts by weight of each raw material: 90 parts of lead powder (content of lead oxide 71wt%), 3.5 parts of positive electrode additives, 10 parts of sulfuric acid (density is 1.40g / cm 3 ), 12 parts of deionized water, the positive electrode additive includes the following raw materials in mass fractions: 45% bismuth oxide, 8% polypropylene fiber, 28% tetrabasic lead sulfate, 19% diatomaceous earth, the lead paste is The preparation steps are as follows:

[0037] S1: Weigh lead powder and positive electrode additives, add them into the paste machine and stir and mix for 10min;

[0038] S2: Add enough deionized water to the blender, stir and mix for 8min;

[0039] S3: Add sulfuric acid into the mixing paste machine, control the speed of a...

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