Unlock instant, AI-driven research and patent intelligence for your innovation.

Lead plaster formula for slowing down softening of positive active substances

A positive electrode active material and lead paste technology, which is applied in the field of lead paste formulations that slow down the softening of the positive active material, can solve problems such as positive plate softening, and achieve the effects of slowing down softening, increasing viscosity, and increasing viscosity

Inactive Publication Date: 2020-07-28
TIANNENG BATTERY WUHU
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a lead paste formula that slows down the softening of the positive electrode active material, so as to solve the problem of softening of the positive plate proposed by the above-mentioned background technology

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of lead plaster formulation that slows down the softening of positive electrode active material, comprises in mass percentage: lead powder 66%; Sulfuric acid 8%; Water 10%; Short fiber 1%; Sodium perborate 10%; Polytetrafluoroethylene emulsion 3%, 1 % Sodium Sulfate and 2% Silica Sol.

Embodiment 2

[0016] A lead paste formula for slowing down the softening of positive active materials, comprising: 94% lead powder, 2% tetrabasic lead sulfate, 0.42% cobaltous sulfate, 1% magnesium sulfate, 0.08% polyester fiber, 0.5% sodium sulfate in mass percentage and 2% silica sol.

Embodiment 3

[0018] A kind of lead plaster formulation that slows down the softening of the active material of the positive electrode, comprising: 1.4g / ml dilute sulfuric acid 8%, deionized water 10%, red lead 10%, colloidal graphite 0.2%, stannous sulfate 0.2%, no 0.2% sodium sulfate water, 0.2% 4BS, 0.2% antimony trioxide, 0.1% polyester staple fiber, 1% sodium sulfate and 3% silica sol, and the rest is lead powder.

[0019] Control group:

[0020] A kind of lead plaster formula: in every 100kg lead powder, add the sulfuric acid 9.8kg of specific gravity 1.40g / ml, pure water 12.8kg, short fiber 0.10 kilogram, mass concentration is 40%, the silica sol 1.0kg of primary particle average diameter is 30nm 0.25 kg of carbon fiber with a carbon content of more than 93%, a tensile strength of 3200 MPa, and a porosity of 0.93%. In addition, some spare water is used to adjust the pure water, and the apparent specific gravity of the lead paste is controlled at 4.20±0.10g / ml.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a lead plaster formula for slowing down softening of a positive electrode active substance and relates to the technical field of battery production and manufacturing. The formula of the lead paste comprises the following components in percentage by mass of 0.5-1.5% of sodium sulfate and 1-3% of silica sol. The lead plaster formula is characterized in that silica sol is added into an existing lead plaster formula, colloid particles are fine and have a quite large specific surface area, the particles are colorless and transparent, and the natural color of a covered objectis not affected. The viscosity is relatively low, and the water can permeate into all places, so dispersibility and permeability are very good when the water is mixed with other substances. When themoisture of the silica sol is evaporated, colloid particles are firmly attached to a surface of an object, silicon-oxygen combination is formed among the particles, and the silica sol is a good adhesive, the silica sol is added to improve viscosity of the positive electrode lead paste, and sodium sulfate is added while the viscosity of the positive electrode lead paste is increased while the initial capacity of the battery is ensured, so the effect of slowing down softening of the positive electrode active substance is achieved.

Description

technical field [0001] The invention belongs to the technical field of battery production and manufacturing, in particular to a lead paste formula for slowing down the softening of positive active materials. Background technique [0002] The currently recognized reaction mechanism of lead-acid batteries shows that lead sulfate is converted into lead dioxide during the charging process of the positive electrode of the lead-acid battery, and lead dioxide is converted into lead sulfate during the discharge process. The structure of the porous electrode changes during the charging and discharging process. The reason is that the density and molar volume of the positive electrode active material lead dioxide and the product lead sulfate after discharge change. Theoretically, the volume change is as much as 2.6 times. The shrinkage and expansion of the volume during the process will lead to the deterioration of the binding force between the active materials, and the network structu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/57H01M4/62H01M10/06
CPCH01M4/57H01M4/621H01M10/06Y02E60/10
Inventor 钦晓峰陈林毛锦敏陆毅高洁龙洋洋
Owner TIANNENG BATTERY WUHU