CN209786078U - bipolar battery grid - Google Patents
bipolar battery grid Download PDFInfo
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- CN209786078U CN209786078U CN201920845598.2U CN201920845598U CN209786078U CN 209786078 U CN209786078 U CN 209786078U CN 201920845598 U CN201920845598 U CN 201920845598U CN 209786078 U CN209786078 U CN 209786078U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model belongs to the lead acid battery field, concretely relates to bipolar battery grid, including the grid base member, the grid base member about the surface all include the sealing area and scribble the district of filling out, the sealing area is established around scribbling the district of filling out, scribbles to be equipped with in the district of filling out and scribbles the hole of filling out, grid base member upper surface scribble to fill out in the district and to coat and to have anodal lead plaster coating, coating in the district of filling out of lower surface has negative pole lead plaster coating. The utility model provides a thereby bipolar battery positive pole side easily takes place the risk that the penetrability corrodes and cause battery cluster check, scribbles the hole of filling up through setting up simultaneously, and furthest's increase the combination of grid and positive negative pole lead plaster coating, improved the sealed and the maintenance performance of battery.
Description
Technical Field
The utility model belongs to the lead acid battery field, concretely relates to bipolar battery grid.
Background
Compared with the traditional lead-acid storage battery, the bipolar lead-acid storage battery has the characteristics of low ohmic resistance, high specific energy, high specific power, long service life and the like, so the bipolar storage battery is widely considered to have the most potential to replace the traditional lead-acid storage battery. The bipolar grid is the core of the technology, and the technical requirements of the bipolar battery on the bipolar grid mainly comprise the following points:
(1) The electrolyte has stronger corrosion resistance, and particularly ensures that the electrolyte can not be corroded and perforated in the use process of the battery to cause electrolyte cross lattice and short circuit failure of the battery for the positive electrode side.
(2) during the electrode curing period, the grid surface is easy to establish a corrosion layer with the lead plaster, and the physical connection and the electronic connection between the grid and the active substance are established, so that the energy output and the service life of the battery in the use process are ensured.
At present, the manufacturing of the traditional grid mainly comprises four methods, namely a casting method commonly used for a traction battery grid, an expanded mesh-pulling method commonly used for an automobile starting battery grid, a continuous rolling and punching method and a continuous casting method. For bipolar grid materials, such as lead alloy or ceramic, the manufacturing method currently includes gravity casting for lead alloy and sintering and forming for ceramic. The alloy cast by gravity is not corrosion resistant, and the segregation of metal components causes the premature failure of the battery; the ceramic sintered battery has poor toughness, and meanwhile, the effective combination of the grid and the active substance can be ensured only after the surface treatment, and in addition, the gassing problem of the grid is also a key factor influencing the sealing of the battery.
For the problem, a large number of comparison researches and tests are carried out on the aspects of corrosion resistance, gas evolution quantity, contact internal resistance of grid active substances and the like through special researches, combination of grid materials and preparation processes, and finally a solution is determined.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model aims at providing a bipolar battery grid has solved the easy risk that causes the battery cluster check of penetrability corruption of taking place of bipolar battery positive pole side, scribbles the hole of filling up through setting up simultaneously, and furthest has increased the combination of grid and positive negative pole lead plaster coating, has improved the sealed and maintenance performance of battery.
The utility model discloses an adopt following technical scheme to realize:
A bipolar battery grid comprises a grid substrate, wherein the upper surface and the lower surface of the grid substrate respectively comprise a sealing area and a coating and filling area, the sealing area is arranged on the periphery of the coating and filling area, coating and filling holes are formed in the coating and filling area, a positive lead plaster coating is distributed in the coating and filling area on the upper surface of the grid substrate, and a negative lead plaster coating is distributed in the coating and filling area on the lower surface of the grid substrate.
Preferably, the grid matrix is lead-antimony alloy, the thickness is 3-6mm, the length and the width can be determined according to the battery capacity, and the lead-antimony alloy comprises the following components in parts by weight: 0.5-2% of antimony, 0.01-0.02% of silver, 0.05-0.1% of selenium and the balance of lead.
Preferably, the filling holes are rectangular holes, the transverse length a is 5-15mm, the longitudinal length b is 10-20mm, the inner corners of the holes are rounded, and the radius of the rounded corners is 5-10 mm.
Preferably, the filling holes are distributed in a rectangular array, the distances c between the peripheral edges of adjacent filling holes are equal, and the depths d and c of the filling holes are equal and are 1-2 mm.
Preferably, the thickness of the positive lead paste coating is 2-4 mm.
Preferably, the thickness of the negative electrode lead paste coating is 2-3 mm.
The positive lead plaster coating and the negative lead plaster coating are respectively coated in the coating and filling areas on the upper surface and the lower surface of the grid matrix, and the lead plaster coating can cover the coating and filling holes and ribs between the coating and filling holes, so that the combination of the grid and the lead plaster can be increased to the greatest extent, the polarization of the battery in the use process is reduced, and the combination strength of the grid and the lead plaster is further improved.
The peripheral width of the sealing area is equal and 3-8mm, so that the adjacent electrodes can be well sealed, and sulfuric acid seepage and gas overflow are prevented.
When the bipolar battery grid is prepared, firstly, lead-antimony alloy is prepared according to the components of a lead-antimony alloy formula, then, a lead-antimony alloy plate is cast, the lead-antimony alloy plate is rolled by 6-7 levels and then cut into a plate with the thickness of 3-6mm, then, corresponding coating and filling holes are prepared in a plate coating and filling area by adopting a milling machine processing technology, then, positive and negative electrode lead pastes are respectively coated in the coating and filling area on the upper surface and the lower surface of a grid matrix, and the coating and filling holes are completely filled and covered by the lead pastes.
Compared with the prior art, the beneficial effects of the utility model are as follows:
(1) the utility model discloses bipolar battery grid overall structure is integrated into one piece, has avoided the alloy liquid mobility that lead-antimony alloy gravity casting grid brought and because the segregation problem of antimony appearing on the grid surface is different in the setting time of alloy composition, has ensured simultaneously that the rolling back alloy crystal form is tiny, inhibits intergranular corrosion and perforation corrosion, has improved the life of battery.
(2) The utility model discloses can reduce the oxygen of positive pole side and the precipitation of negative pole side hydrogen, improve the sealed and the maintenance performance of battery.
(3) The utility model discloses be equipped with on the grid base member and scribble the filler hole, can further improve the bonding strength of grid and lead plaster.
Drawings
Fig. 1 is a schematic diagram of a bipolar battery grid structure of the present invention;
Fig. 2 is a top view of the grid substrate of the present invention;
Fig. 3 is an internal resistance test chart in embodiment 1 of the present invention;
Fig. 4 is an internal resistance test chart in embodiment 2 of the present invention;
In the figure: 1. a positive lead paste coating; 2. a grid substrate; 3. a negative lead plaster coating; 4. coating and filling the area; 5. a sealing zone; 6. and (6) filling the holes.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1-2, a bipolar battery grid comprises a grid substrate 2, wherein the upper surface and the lower surface of the grid substrate 2 both comprise a sealing area 5 and a coating area 4, the sealing area 5 is arranged around the coating area 4, coating holes 6 are arranged in the coating area 4, a positive lead plaster coating 1 is coated in the coating area 4 on the upper surface of the grid substrate 2, and a negative lead plaster coating 3 is coated in the coating area 4 on the lower surface.
the grid matrix 2 is lead-antimony alloy, and has a length of 80mm, a width of 60mm and a thickness of 6 mm.
The filling holes 6 are rectangular holes, the transverse length a is 15mm, the longitudinal length b is 10mm, the inner corners of the holes are rounded, and the radius of the rounded corners is 5 mm.
the filling holes 6 are distributed in a rectangular array, the distances c between the peripheral edges of the adjacent filling holes 6 are equal, and the depths d and c of the filling holes 6 are equal to 1.5 mm.
The thickness of the positive lead plaster coating 1 is 3 mm.
The thickness of the negative lead plaster coating 3 is 2.5 mm.
The width of the periphery of the sealing area 5 is equal, and the width is 5 mm.
The preparation process comprises the following steps:
The formula comprises the following components in parts by weight: preparing an alloy from 1.5% of antimony, 0.01% of silver, 0.05% of selenium and the balance of lead, casting a lead-antimony alloy plate with the thickness of 20mm, rolling the plate to 6mm step by step through 6-stage rolling, cutting the plate into a plate with the thickness of 80mm multiplied by 60mm, and processing coating and filling holes 6 distributed in a rectangular array in a coating and filling area 4 on a milling machine, wherein the width of a sealing area 5 is 5mm to obtain a grid substrate 2;
preparing lead pastes of the positive electrode and the negative electrode according to the following formula:
The positive lead plaster formula comprises: 2kg of lead powder (Pb25 wt% + PbO75 wt%) and red lead (Pb)3O4)500g, 120mL of sulfuric acid (density d is 1.4g/mL), 1g of polypropylene fiber and 220mL of distilled water;
The negative lead plaster formula comprises: 2kg of lead powder (Pb25 wt% + PbO 75%), 5g of carbon black, 5g of sodium lignosulfonate, 1g of polypropylene fiber, 100mL of sulfuric acid (with the density d being 1.4g/mL) and 220mL of distilled water;
And respectively coating positive and negative lead pastes on the coating and filling area 4 of the positive electrode surface and the coating and filling area 4 of the negative electrode surface, and completely filling and covering the coating and filling holes 6 with the lead pastes to obtain a positive lead paste coating 1 with the thickness of 3mm and a negative lead paste coating 3 with the thickness of 2.5 mm.
After coating, the grid is soaked in 1.05g/mL sulfuric acid solution for 10s, then the grid is solidified and externalized to form a polar plate, the polar plate is dried, a sealing area 5 is polished, then the battery is assembled (2hr rated capacity is 3.5Ah), and the performance of the battery is tested.
The test contents comprise: internal resistance test, gas evolution test and service life test, the battery prepared in the embodiment is used as a sample, and a gravity-cast 3.5Ah bipolar lead-acid storage battery is used as a reference.
(1) The internal resistance test is carried out by adopting American Arbin2000 equipment, the resistance change in the charging process is tested, and the test result is shown in figure 3.
(2) The gas evolution test was carried out by charging continuously at 180mA for 100h in a 30 ℃ water bath and collecting the gas according to the method YD-T79-20107.10, the test results are shown in Table 1.
| Name (R) | Gas volume/mL |
| Reference device | 54 |
| Sample (I) | 48 |
TABLE 1
(3) The service life test adopts 1.8A to discharge to 1.7V, the constant voltage current-limiting charging of 800mA/2.4V is carried out for 6h, 1 charge-discharge cycle is carried out, the test temperature is 25-30 ℃, and when the discharge time of the battery is less than 84min, the battery is invalid. Tests show that the reference battery fails after being cycled for 300 times, and dissection shows that obvious corrosion occurs on the side of the positive grid and penetrating corrosion occurs on the bipolar grid, so that sulfuric acid electrolyte is formed in a grid; when the sample battery is circulated for 450 times, the discharge time is 85min, and the dissected discovery shows that the grid state is good, and the active substances soften and fall off, so that the battery fails.
example 2
As shown in fig. 1-2, a bipolar battery grid comprises a grid substrate 2, wherein the upper surface and the lower surface of the grid substrate 2 both comprise a sealing area 5 and a coating area 4, the sealing area 5 is arranged around the coating area 4, coating holes 6 are arranged in the coating area 4, a positive lead plaster coating 1 is coated in the coating area 4 on the upper surface of the grid substrate 2, and a negative lead plaster coating 3 is coated in the coating area 4 on the lower surface.
the grid matrix 2 is made of lead-antimony alloy, and is 100mm in length, 80mm in width and 6mm in thickness.
The filling holes 6 are rectangular holes, the transverse length a is 15mm, the longitudinal length b is 10mm, the inner corners of the holes are rounded, and the radius of the rounded corners is 5 mm.
The filling holes 6 are distributed in a rectangular array, the distances c between the peripheral edges of the adjacent filling holes 6 are equal, and the depths d and c of the filling holes 6 are equal to each other and are 2 mm.
The thickness of the positive lead plaster coating 1 is 3 mm.
the thickness of the negative lead plaster coating 3 is 2.5 mm.
The width of the periphery of the sealing area 5 is equal, and the width is 5 mm.
The preparation process comprises the following steps:
the formula comprises the following components in parts by weight: preparing 2.0% of antimony, 0.02% of silver, 0.1% of selenium and the balance of lead into alloy, casting a lead-antimony alloy plate with the thickness of 20mm, rolling the plate to 6mm step by step through 6-stage rolling, cutting the plate into a plate with the thickness of 100mm multiplied by 80mm, and processing coating and filling holes 6 distributed in a rectangular array in a coating and filling area 4 on a milling machine, wherein the width of a sealing area 5 is 5mm to obtain a grid substrate 2;
Preparing lead pastes of the positive electrode and the negative electrode according to the following formula:
The positive lead plaster formula comprises: 2kg of lead powder (Pb25 wt% + PbO75 wt%) and red lead (Pb)3O4)600g, 120mL of sulfuric acid (density d is 1.4g/mL), 1g of polypropylene fiber and 220mL of distilled water;
The negative lead plaster formula comprises: 2kg of lead powder (Pb25 wt% + PbO 75%), 5g of carbon black, 6g of sodium lignosulfonate, 1g of polypropylene fiber, 100mL of sulfuric acid (with the density d being 1.4g/mL) and 220mL of distilled water;
And respectively coating positive and negative lead pastes on the coating and filling area 4 of the positive electrode surface and the coating and filling area 4 of the negative electrode surface, and completely filling and covering the coating and filling holes 6 with the lead pastes to obtain a positive lead paste coating 1 with the thickness of 3mm and a negative lead paste coating 3 with the thickness of 2.5 mm.
After coating, the grid is soaked in 1.05g/mL sulfuric acid solution for 10s, then the grid is solidified and externalized to form a polar plate, the polar plate is dried, a sealing area 5 is polished, then the battery is assembled (2hr rated capacity is 3.5Ah), and the performance of the battery is tested.
The test contents comprise: internal resistance test, gas evolution test and service life test, the battery prepared in the embodiment is used as a sample, and a gravity-cast 5.5Ah bipolar lead-acid storage battery is used as a reference.
(1) the internal resistance test is carried out by adopting American Arbin2000 equipment, the resistance change in the charging process is tested, and the test result is shown in figure 4.
(2) The gas evolution test was carried out at 300mA, continuously charged in a 30 ℃ water bath for 100h, and the gas was collected according to the method of YD-T79-20107.10, the test results are shown in Table 2.
| Name (R) | Gas volume/mL |
| reference device | 65 |
| Sample (I) | 59 |
TABLE 2
(3) The service life test adopts 1 charge-discharge cycle of 3.0A discharging to 1.7V and 1.3A/2.4V constant voltage current-limiting charging for 6h, the test temperature is 25-30 ℃, and when the discharge time of the battery is less than 84min, the battery is invalid. Tests show that the reference battery fails 285 times in a circulating manner, and dissection shows that obvious corrosion occurs on the side of the positive grid and penetrating corrosion occurs on the bipolar grid, so that sulfuric acid electrolyte is formed into grids; when the sample battery is circulated for 400 times, the discharge time is 84min, and the dissected discovery shows that the grid state is good, and the active substances soften and fall off, so that the battery fails.
of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.
Claims (7)
1. A bipolar battery grid comprising a grid substrate (2), characterized in that: the upper surface and the lower surface of the grid matrix (2) respectively comprise a sealing area (5) and a coating and filling area (4), the sealing area (5) is arranged on the periphery of the coating and filling area (4), coating and filling holes (6) are formed in the coating and filling area (4), an anode lead plaster coating (1) is coated in the coating and filling area (4) on the upper surface of the grid matrix (2), and a cathode lead plaster coating (3) is coated in the coating and filling area (4) on the lower surface.
2. The bipolar battery grid of claim 1, wherein: the grid matrix (2) is lead-antimony alloy, and the thickness is 3-6 mm.
3. the bipolar battery grid of claim 1, wherein: the coating and filling holes (6) are rectangular holes, the transverse length a is 5-15mm, the longitudinal length b is 10-20mm, the inner corners of the holes are rounded, and the radius of the rounded corners is 5-10 mm.
4. The bipolar battery grid of claim 3, wherein: the filling holes (6) are distributed in a rectangular array, the distances c between the peripheral edges of the adjacent filling holes (6) are equal, and the depths d and c of the filling holes (6) are equal and are 1-2 mm.
5. The bipolar battery grid of claim 1, wherein: the thickness of the positive lead plaster coating (1) is 2-4 mm.
6. The bipolar battery grid of claim 1, wherein: the thickness of the negative lead plaster coating (3) is 2-3 mm.
7. the bipolar battery grid of claim 1, wherein: the peripheral width of the sealing area (5) is equal and is 3-8 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920845598.2U CN209786078U (en) | 2019-06-05 | 2019-06-05 | bipolar battery grid |
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| CN201920845598.2U CN209786078U (en) | 2019-06-05 | 2019-06-05 | bipolar battery grid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113054200A (en) * | 2021-03-11 | 2021-06-29 | 史鹏飞 | Bipolar grid for lead-acid storage battery formed by compounding frame and lead wire |
| CN113506879A (en) * | 2021-04-15 | 2021-10-15 | 淄博火炬能源有限责任公司 | Light bipolar lead-acid storage battery and preparation method thereof |
-
2019
- 2019-06-05 CN CN201920845598.2U patent/CN209786078U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113054200A (en) * | 2021-03-11 | 2021-06-29 | 史鹏飞 | Bipolar grid for lead-acid storage battery formed by compounding frame and lead wire |
| CN113506879A (en) * | 2021-04-15 | 2021-10-15 | 淄博火炬能源有限责任公司 | Light bipolar lead-acid storage battery and preparation method thereof |
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