CN109742407B - Lead storage battery composite grid and preparation method thereof - Google Patents
Lead storage battery composite grid and preparation method thereof Download PDFInfo
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- CN109742407B CN109742407B CN201811570622.2A CN201811570622A CN109742407B CN 109742407 B CN109742407 B CN 109742407B CN 201811570622 A CN201811570622 A CN 201811570622A CN 109742407 B CN109742407 B CN 109742407B
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a lead storage battery composite grid and a preparation method thereof. The composite grid for lead accumulator has upper frame ribs, vertical ribs and transverse ribs of lead alloy, and lower frame ribs and two side frame ribs of high molecular polymer. According to the lead storage battery composite grid, the grid structure is designed to be that the upper frame ribs, the vertical ribs and the transverse ribs are made of lead alloy, and the lower frame ribs and the frame ribs on two sides are made of high polymer, so that the total lead consumption is reduced by about 9% and the production cost of the battery is reduced by more than 7% compared with the grid which is totally made of lead alloy, and the performance of the lead storage battery is not influenced. The weight ratio energy of the lead storage battery is improved from about 38.5Wh/kg of all lead alloy grids to over 41Wh/kg, so that the light weight of the lead storage battery is realized, the energy is saved, and the waste is reduced.
Description
Technical Field
The invention relates to the technical field of lead storage battery production, in particular to a lead storage battery composite grid and a preparation method thereof.
Background
The lead-acid storage battery is composed of a positive plate, a negative plate, a separator and the like, wherein the positive plate is formed by coating positive lead paste (active substance) on a positive plate grid, and the negative plate is formed by coating negative lead paste (active substance) on a negative plate grid. The grid is used as the main component of the lead-acid storage battery and has the following functions: the carrier of the active substance plays a role of supporting and adhering the active substance by a framework; the second is a current conductor which plays the roles of collecting current, converging current and transmitting current. The conventional grid of the power lead-acid storage battery is basically a gravity casting grid, the material of the grid is lead or lead-based alloy, the grid occupies a large proportion on the cost of the lead-acid storage battery, and taking a 6-DZF-20 battery as an example, the lead consumption weight of a positive grid and a negative grid accounts for about 26 percent of the total lead consumption of the whole battery, and the positive grid and the negative grid occupy a large proportion.
The existing grid is firstly manufactured into a large connected grid, the grid comprises a frame formed by encircling an upper frame rib, a lower frame rib and two side frame ribs, and vertical ribs and transverse ribs which are criss-cross and arranged in the frame, wherein tabs are arranged on the upper frame ribs. Vertical rib and horizontal rib are thinner, the frame rib is thicker, the structure of grid is analyzed from the effect of grid, vertical rib and horizontal rib play the effect of mass flow and adhesion active material, the frame rib also plays the effect of mass flow and adhesion active material, but the frame rib is thicker, from the mass flow angle consideration, it is great that the frame rib mass flow is gone up, and frame rib, both sides frame rib mass flow are less down, but the lead consumption of frame rib, both sides frame rib account for 35% of whole grid lead consumption down, cause the waste of lead raw materials. On the other hand, when lead is used as a grid material, the internal resistance is increased and the battery capacity is reduced due to the immersion corrosion of the electrolyte, which affects the service life.
For example, chinese patent application publication No. CN103746120A discloses a battery grid, which includes a grid and a frame disposed along the periphery of the grid, wherein the grid is made of a metal alloy, and the metal alloy includes, by weight: aluminum: 86% -90%, magnesium: 3-7%, tin: 5-9%, and the surface of the grid is plated with silver.
The Chinese patent application with the publication number of CN101847723A discloses a spare lead-acid storage battery grid, which comprises a grid, and transverse ribs and vertical ribs arranged on the grid. The center distance between the transverse ribs is 8-9 mm, the center distance between the vertical ribs is 8-10 mm, and the radius of the circular arc at the four corners of the grid is 7-9 mm.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the lead storage battery composite grid and the preparation method thereof, and the aims of saving the total lead consumption, reducing the production cost and improving the product competitiveness are achieved by improving the grid structure.
The utility model provides a lead storage battery composite grid, lead storage battery composite grid includes the frame that is formed by enclosing last frame rib, lower frame rib, both sides frame rib and locates criss-cross vertical rib and horizontal rib in the frame, be provided with utmost point ear on the last frame rib, go up frame rib, vertical rib and horizontal rib and make by lead alloy, lower frame rib and both sides frame rib are made by high molecular polymer.
Preferably, the high molecular polymer is polycarbonate. The polycarbonate is acid-resistant, and is relatively stable when being soaked in electrolyte sulfuric acid of the lead storage battery. The polycarbonate has high strength, stable size and small creep deformation, the strength meets the strength requirement of the lead storage battery when the polar plate is manufactured, the temperature resistance requirement of the polar plate in the curing process is met, and the creep deformation meets the creep deformation requirement of the lead storage battery in the charging and discharging process.
The space between the vertical ribs on the two sides and the side frame ribs is 1/3-1/2 of the space between two adjacent vertical ribs; the distance between the transverse ribs and the lower frame ribs at the bottom is 1/3-1/2 of the distance between two adjacent transverse ribs. Because the lower frame ribs and the two side frame ribs prepared from the high molecular polymer only play a role in adhering lead plaster (active substance) and do not play a role in collecting current and guiding current, the vertical ribs positioned at two sides are adjusted to be closer to the side frame ribs, and the transverse ribs positioned at the bottom are adjusted to be closer to the lower frame ribs, so that the current collecting and guiding effects of two sides and a bottom area are enhanced. Certainly, if the flow collecting and flow guiding functions of the grid are further increased to make up the influence of the frame ribs and the lower frame ribs on the flow collecting and flow guiding functions, the number of the vertical ribs and the number of the horizontal ribs can be increased by one compared with the existing design.
In order to enhance the bonding strength between the lower frame ribs, the two side frame ribs and the rest lead plate grids of the high molecular polymer, the end parts of the vertical ribs extend into the lower frame ribs; the ends of the transverse ribs extend into the side frame ribs. The length of the end part of the vertical rib extending into the lower frame rib is 1/2-1 of the width of the lower frame rib; the end parts of the transverse ribs extend into the side frame ribs, and the length of the transverse ribs is 1/2-1 of the width of the side frame ribs.
In order to further enhance the bonding strength between the upper frame rib and the side frame rib of the high polymer, the upper frame rib is provided with a bending area connected with the side frame rib, and the tail end of the upper frame rib is provided with a connecting column extending into the end part of the side frame rib. The length of the connecting column is 1/2-3/2 of the width of the side frame rib, and the cross-sectional area is 1/3-1/2 of the cross-sectional area of the side frame rib.
The invention also provides a preparation method of the lead storage battery composite grid, which comprises the following steps:
(1) providing a grid with only upper frame ribs, transverse ribs and vertical ribs;
(2) placing the lead plate grid in a lead storage battery composite grid mould, wherein the lead storage battery composite grid mould is provided with a mould cavity for forming a lower frame rib and two side frame ribs;
(3) and (3) injecting a high molecular polymer into the lead storage battery composite grid mold, and performing injection molding to form a complete composite grid.
Preferably, the lead grids in the step (1) are connected grids, and the single lead storage battery composite grid is obtained by cutting after injection molding. The lead storage battery composite grid mould is matched with the connected grid and comprises a plurality of mould cavities matched with the single grid.
According to the lead storage battery composite grid, the grid structure is designed to be that the upper frame ribs, the vertical ribs and the transverse ribs are made of lead alloy, and the lower frame ribs and the frame ribs on two sides are made of high polymer, so that the total lead consumption is reduced by about 9% and the production cost of the battery is reduced by more than 7% compared with the grid which is totally made of lead alloy, and the performance of the lead storage battery is not influenced. The weight ratio energy of the lead storage battery is improved from about 38.5Wh/kg of all lead alloy grids to over 41Wh/kg, so that the light weight of the lead storage battery is realized, the energy is saved, and the waste is reduced.
Drawings
Fig. 1 is a schematic structural view of a lead grid having only upper frame ribs, transverse ribs and vertical ribs.
Fig. 2 is a schematic structural diagram of the lead storage battery composite grid of the invention.
Fig. 3 is a schematic structural diagram of a connected lead grid.
Fig. 4 is a schematic structural diagram of a connected lead storage battery composite grid.
Detailed Description
Example 1
As shown in fig. 1 and 2, a lead storage battery composite grid comprises a frame formed by encircling an upper frame rib 1, a lower frame rib 2 and two side frame ribs 3, and vertical ribs 4 and horizontal ribs 5 which are arranged in the frame and are staggered vertically and horizontally, wherein a tab 6 is arranged on the upper frame rib 1, the vertical ribs 4 and the horizontal ribs 5 are made of lead alloy, and the lower frame rib 2 and the two side frame ribs 3 are made of high molecular polymer. Preferably, the high molecular weight polymer of choice is polycarbonate.
The distance between the vertical ribs 4 positioned on the two sides and the side frame ribs 3 is 1/3-1/2 of the distance between two adjacent vertical ribs 4; the distance between the transverse ribs 5 positioned at the bottom and the lower frame ribs 2 is 1/3-1/2 of the distance between two adjacent transverse ribs 5. Because lower frame muscle strip 2 and both sides frame muscle strip 3 that high molecular polymer prepared only play the effect of adhesion lead plaster (active material), do not play mass flow, water conservancy diversion's effect, so adjust the vertical muscle strip 4 that is located both sides to the position that is closer to side frame muscle strip 3, adjust the horizontal muscle strip 5 that is located the bottom to the position that is closer to lower frame muscle strip 2 to strengthen the regional mass flow and the water conservancy diversion effect in both sides and bottom. Certainly, if the current collecting and flow guiding functions of the grid need to be further increased to make up for the influence of the frame ribs 3 and the lower frame ribs 2 on the current collecting and flow guiding functions, the number of the vertical ribs 4 and the number of the horizontal ribs 5 can be increased by one respectively compared with the existing design.
In order to enhance the bonding strength between the lower frame ribs 2, the two side frame ribs 3 and the rest of the lead plate grids of the high molecular polymer, the end parts of the vertical ribs 4 extend into the lower frame ribs 2; the ends of the transverse ribs 5 extend into the side frame ribs 3. The length of the end part of the vertical rib 4 extending into the lower frame rib 2 is 1/2-1 of the width of the lower frame rib 2; the length that the tip of horizontal rib 5 stretched into side frame rib 3 is 1/2 ~ 1 of side frame rib 3 width.
In order to further enhance the bonding strength between the upper frame rib 1 and the side frame rib 3 made of high molecular polymer, the upper frame rib 1 is provided with a bending area 7 connected with the side frame rib 3, and the tail end of the upper frame rib 1 is provided with a connecting column 8 extending into the end part of the side frame rib 3. The length of the connecting column 8 is 1/2-3/2 of the width of the side frame rib 3, and the cross-sectional area is 1/3-1/2 of the cross-sectional area of the side frame rib 3.
According to the lead storage battery composite grid, the grid structure is designed to be that the upper frame ribs 1, the vertical ribs 4 and the transverse ribs 5 are made of lead alloy, and the lower frame ribs 2 and the two side frame ribs 3 are made of high polymer, so that the total lead consumption is reduced by about 9% and the production cost of the battery is reduced by more than 10% compared with the grid which is totally made of lead alloy, and the performance of the lead storage battery is not influenced. The weight ratio energy of the lead storage battery is improved from about 38.5Wh/kg of all lead alloy grids to over 41Wh/kg, so that the light weight of the lead storage battery is realized, the energy is saved, and the waste is reduced.
Example 2
The preparation method of the lead storage battery composite grid in the embodiment 1 comprises the following steps:
(1) providing a lead grid only provided with upper frame ribs 1, transverse ribs 5 and vertical ribs 4, wherein the lead grid is a connected grid (figure 3).
(2) Placing the lead plate grid in a lead storage battery composite grid mould, wherein the lead storage battery composite grid mould is provided with a mould cavity for forming a lower frame rib 2 and two side frame ribs 3; the lead storage battery composite grid mould is matched with the connected grid and comprises a plurality of mould cavities matched with the single grid.
(3) And (3) injecting high-molecular polymer polycarbonate into the lead storage battery composite grid mould, performing injection molding to form a complete composite grid, and cutting after the injection molding is finished to obtain a single lead storage battery composite grid.
Claims (6)
1. A lead storage battery composite grid comprises a frame formed by encircling an upper frame rib, a lower frame rib and two side frame ribs, and vertical ribs and transverse ribs which are arranged in the frame and criss-cross, wherein the upper frame rib is provided with a tab, the lead storage battery composite grid is characterized in that the upper frame rib, the vertical ribs and the transverse ribs are made of lead alloy, the lower frame rib and the two side frame ribs are made of high molecular polymer,
the distance between the vertical ribs positioned on the two sides and the side frame ribs is 1/3-1/2 of the distance between two adjacent vertical ribs; the distance between the transverse ribs and the lower frame ribs at the bottom is 1/3-1/2 of the distance between two adjacent transverse ribs,
the end parts of the vertical ribs extend into the lower frame ribs; the ends of the transverse ribs extend into the side frame ribs,
the length of the end part of the vertical rib extending into the lower frame rib is 1/2-1 of the width of the lower frame rib; the end parts of the transverse ribs extend into the side frame ribs, and the length of the transverse ribs is 1/2-1 of the width of the side frame ribs.
2. The lead storage battery composite grid according to claim 1, wherein the high molecular polymer is polycarbonate.
3. The lead-acid battery composite grid according to claim 1, wherein the upper frame ribs have bent regions for engaging the side frame ribs and the ends have connecting posts extending into the ends of the side frame ribs.
4. The lead storage battery composite grid according to claim 3, wherein the length of the connecting column is 1/2-3/2 of the width of the side frame rib, and the cross-sectional area is 1/3-1/2 of the cross-sectional area of the side frame rib.
5. The method for preparing the lead storage battery composite grid according to claim 1, which is characterized by comprising the following steps:
(1) providing a grid with only upper frame ribs, transverse ribs and vertical ribs;
(2) placing the lead plate grid in a lead storage battery composite grid mould, wherein the lead storage battery composite grid mould is provided with a mould cavity for forming a lower frame rib and two side frame ribs;
(3) and (3) injecting a high molecular polymer into the lead storage battery composite grid mold, and performing injection molding to form a complete composite grid.
6. The preparation method of claim 5, wherein in the step (1), the lead grids are connected grids, and the lead storage battery composite grids are obtained by cutting after injection molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570622.2A CN109742407B (en) | 2018-12-21 | 2018-12-21 | Lead storage battery composite grid and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811570622.2A CN109742407B (en) | 2018-12-21 | 2018-12-21 | Lead storage battery composite grid and preparation method thereof |
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| CN109742407A CN109742407A (en) | 2019-05-10 |
| CN109742407B true CN109742407B (en) | 2020-12-25 |
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| CN111554939A (en) * | 2019-09-16 | 2020-08-18 | 超威电源集团有限公司 | Lead mesh grid for lead storage battery and preparation method thereof |
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| ZA771344B (en) * | 1976-05-17 | 1978-04-26 | Globe Union Inc | Composite article and method of manufacturing |
| US5098799A (en) * | 1990-11-27 | 1992-03-24 | Globe-Union Inc. | Battery electrode growth accommodation |
| CN102931415B (en) * | 2012-10-29 | 2015-05-13 | 天能电池集团有限公司 | Lead-acid battery composite plate grid, pole plate and battery |
| CN204991849U (en) * | 2015-08-31 | 2016-01-20 | 朱学军 | Compound grid |
| CN205543057U (en) * | 2016-02-22 | 2016-08-31 | 保定金阳光能源装备科技有限公司 | Lead acid battery is with compound grid |
| CN206098543U (en) * | 2016-08-31 | 2017-04-12 | 保定金阳光能源装备科技有限公司 | Battery is with compound grid |
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Address after: 313100 Zhejiang city of Huzhou province Changxing County Meishan Industrial Park Applicant after: TIANNENG BATTERY GROUP Co.,Ltd. Address before: 313100 Zhejiang city of Huzhou province Changxing County Meishan Industrial Park Applicant before: TIANNENG BATTERY GROUP Co.,Ltd. |
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