CN214012978U - High-specific-energy lead-acid storage battery - Google Patents
High-specific-energy lead-acid storage battery Download PDFInfo
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- CN214012978U CN214012978U CN202022730446.3U CN202022730446U CN214012978U CN 214012978 U CN214012978 U CN 214012978U CN 202022730446 U CN202022730446 U CN 202022730446U CN 214012978 U CN214012978 U CN 214012978U
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- 239000002253 acid Substances 0.000 title claims abstract description 29
- 238000003860 storage Methods 0.000 title claims description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 64
- 238000000576 coating method Methods 0.000 claims abstract description 64
- 239000004033 plastic Substances 0.000 claims description 15
- 229920003023 plastic Polymers 0.000 claims description 15
- 229910000978 Pb alloy Inorganic materials 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 7
- 239000011888 foil Substances 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 239000011149 active material Substances 0.000 abstract description 18
- 210000000188 Diaphragm Anatomy 0.000 description 21
- 238000004519 manufacturing process Methods 0.000 description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000000654 additive Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N Antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L Barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 230000000996 additive Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 240000008549 Vitex agnus castus Species 0.000 description 1
- 235000001667 Vitex agnus castus Nutrition 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006255 coating slurry Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000004021 humic acid Substances 0.000 description 1
- 239000002142 lead-calcium alloy Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002522 swelling Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The utility model discloses a high specific energy lead acid battery, it includes positive plate, negative plate, first diaphragm and second diaphragm, first diaphragm, positive plate, second diaphragm and negative plate are folded after folding in proper order and are formed the utmost point crowd of column, and the positive plate includes film form positive grid and anodal coating, and the front and the back of positive grid have the anodal coating respectively, and the negative plate includes film form negative grid and negative coating, and the front and the back of negative grid have coated respectively negative coating, positive plate and negative plate thickness all do not exceed 300 mu m, and anodal coating and negative coating are formed by the active material coating. The utility model discloses a receive the structural design who folds after range upon range of, with continuous positive negative pole grid of membranous and negative pole grid respectively the positive negative pole active material of coating form thickness and be no longer than 300 mu m's positive negative pole plate, membranous grid is little with active material coating thickness, can greatly improve the active material utilization ratio to improve the energy density of battery.
Description
Technical Field
The utility model relates to a battery technical field, concretely relates to high specific energy lead acid battery.
Background
The lead-acid storage battery comprises a shell, positive and negative plates, a partition plate and the like, and the traditional structure of the lead-acid storage battery is that a single battery is formed by flat plate type plate laminations (for example, the application number is CN201320052280, the name is a power type lead-acid storage battery plate group, the application number is CN201811038385, the name is a lead-acid storage battery curved surface grid structure), wherein the plates are composed of grid-shaped lead alloy grids and active substances, and the structural design at least has the following defects:
firstly, because the grid needs to have the functions of charging and discharging current conductors and providing mechanical strength, the thickness of a frame is generally 1-1.5mm, and meanwhile, in order to meet the requirement of corrosion resistance, the thickness of a middle chaste tree twig is generally 0.6-1.2mm, so that the weight of the grid is large, and the gravimetric specific energy of a finished battery is greatly reduced.
Secondly, the contact area between the grid and the active material is limited, so that the charge and discharge power of the finished battery is limited.
And thirdly, the thickness of the grid is limited, the coating thickness of the active substance is generally 1-1.2mm, so that the reaction depth of the polar plate is insufficient, the utilization rate of the active substance is generally not more than 35%, and the improvement of the energy density of the battery is limited to a great extent.
Fourthly, the production of the polar plate with the structure comprises the procedures of slicing, wrapping and the like, the process is complicated, and the process rejection rate, the production energy consumption and the human resource are improved.
In addition, the design of the traditional flat laminated battery also needs structures such as lugs and busbars, so that the weight ratio energy of the finished battery is further reduced, additional internal resistance loss is caused, and the energy efficiency is reduced.
In the field of energy storage of lithium batteries, copper foil manufactured by a plating layer is generally adopted as a current collector and an active material carrier to form a film-shaped polar plate strip, and then the battery is produced by a winding or lamination process, so that the utilization rate of positive and negative active materials can be effectively improved, and the purpose of improving the energy specific energy of the battery is achieved. In the lead-acid battery field, lead or lead alloys are the only choice as current collectors and active material carriers due to considerations of the cell reaction mechanisms, such as the strong acidity of the electrolyte, the strong corrosivity, and the binding of the reactive active materials to the current collector. However, due to the characteristics of soft quality and low mechanical strength of the metal lead, a complete technical scheme for realizing a film-shaped polar plate winding type lead-acid battery similar to a lithium battery does not exist yet.
For example, the invention patent with the application number of 201410327285.X discloses a wound lead-acid storage battery, which adopts a pole plate made of a punched grid with the thickness of 0.3-0.5mm after being filled with active substances, and winds the pole plate to form a battery monomer with fan-shaped lugs distributed at two ends.
Therefore, there is a need to improve the structural design of the conventional lead-acid battery in view of the above disadvantages.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high specific energy lead acid battery, it has not only improved the energy density and the charge-discharge power of battery, has promoted production efficiency moreover and has reduced manufacturing cost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a high-specific energy lead-acid storage battery comprises a positive plate, a negative plate, a first diaphragm and a second diaphragm, wherein the first diaphragm, the positive plate, the second diaphragm and the negative plate are sequentially stacked and then folded to form a columnar electrode group, the positive plate comprises a film-shaped positive plate grid and a positive coating, the front surface and the back surface of the positive plate grid are respectively coated with the positive coating, the negative plate comprises a film-shaped negative plate grid and a negative coating, the front surface and the back surface of the negative plate grid are respectively coated with the negative coating, the thicknesses of the positive plate and the negative plate are not more than 300 mu m, and the positive coating and the negative coating are formed by coating active substances.
Furthermore, the mode of folding to form the columnar pole group adopts winding or continuous folding, the thickness of the positive plate and the negative plate is 18-300 μm, the thickness of the positive plate grid is 10-200 μm, and the thickness of the negative plate grid is 8-200 μm.
Further, the coating height of the positive coating is lower than that of the positive grid so as to reserve a positive pole lug connection section, and the coating height of the negative coating is lower than that of the negative grid so as to reserve a negative pole lug connection section.
Further, the positive grid and the negative grid package adopt a perforated or non-perforated structure, and the positive grid and the negative grid adopt lead foils or lead alloy foils or plastic and lead/lead alloy composite films.
Furthermore, the first diaphragm and the second diaphragm adopt glass fiber diaphragms or microporous plastic diaphragms or non-woven fabrics.
The cylindrical pole group is arranged in the battery shell after being folded, and the battery shell is cylindrical, elliptic cylindrical or cuboid.
Further, the battery shell is made of an insulating material, and the insulating material is made of ABS engineering plastics or PP plastics or PC plastics.
After the technical scheme is adopted, compared with the background art, the utility model, have following advantage:
1. the utility model discloses a receive the structural design who folds after range upon range of, with continuous positive negative pole grid of membranous and negative pole grid respectively the positive negative pole active material of coating form thickness and be no longer than 300 mu m's positive negative pole plate, membranous grid is little with active material coating thickness, can greatly improve the active material utilization ratio to improve the energy density of battery.
2. The utility model discloses a conductor is collected as the electric current to modulus of continuity grid, and it is big with active material area of contact, contrast traditional grid form grid, and corrosion resisting property improves, not only can greatly improve the charge-discharge power of battery, can effectively improve the cycle life of battery moreover.
3. The utility model discloses compare with traditional lamination formula lead acid battery, do not have processes such as branch section, package piece, production process is simple high-efficient, can greatly promote production efficiency and reduction in production cost.
4. The utility model discloses a structural design of no utmost point ear reduces the battery internal resistance, can improve energy utilization and reduce the phenomenon of generating heat, and simultaneously, no busbar isotructure can further reduce battery weight, improves finished product battery gravimetric specific energy.
5. The utility model discloses a column structure not only can adopt higher assembly pressure, improves the permeability of electrolyte, further improves the active material utilization ratio, can also improve the battery at the heat dispersion of charge-discharge process, effectively reduces because of the battery swell that reasons such as thermal runaway caused to improve battery life.
Drawings
FIG. 1 is a schematic structural diagram of a middle columnar pole group according to the present invention;
FIG. 2 is a second schematic structural view of a middle columnar pole group according to the present invention;
FIG. 3 is a schematic diagram of a battery cell;
FIG. 4 is a block flow diagram of the present invention;
FIG. 5 is one of the schematic diagrams of cells connected in series into a battery pack (top);
fig. 6 is a second schematic diagram (bottom) of battery cells connected in series to form a battery pack.
Description of reference numerals:
the positive plate 100, the positive plate grid 110, the positive pole tab connecting section 111 and the positive pole coating 120;
a negative plate 200, a negative plate grid 210, a negative pole tab connecting section 211 and a negative pole coating 220;
a first diaphragm 300;
a second diaphragm 400;
a battery case 500.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or position relationship shown in the drawings, and are only for convenience of description and simplification of the present invention, but do not indicate or imply that the device or element of the present invention must have a specific orientation, and thus, should not be construed as limiting the present invention.
Examples
With reference to fig. 1 to 6, the utility model discloses a high specific energy lead-acid storage battery, including positive plate 100, negative plate 200, first diaphragm 300 and second diaphragm 400, first diaphragm 300, positive plate 100, second diaphragm 400 and negative plate 200 are folded and are folded after range upon range of in proper order and form the column utmost point crowd. Compared with the traditional laminated lead-acid storage battery, the laminated lead-acid storage battery has the advantages that the processes of slicing, wrapping and the like are omitted, the production process is simple and efficient, the production efficiency can be greatly improved, and the production cost can be greatly reduced.
The positive plate 100 includes a film-shaped positive plate grid 110 and a positive coating 120, the positive plate grid 110 is coated with the positive coating 120 on the front surface and the back surface, the negative plate 200 includes a film-shaped negative plate grid 210 and a negative coating 220, the negative plate grid 210 is coated with the negative coating 220 on the front surface and the back surface, the thickness of the positive plate 100 and the negative plate 200 is not more than 300 μm, and the positive coating 120 and the negative coating 220 are formed by coating active materials.
In this embodiment, the winding or continuous folding (such as zigzag folding) is adopted to form the cylindrical electrode group, the thickness of the positive electrode plate 100 and the negative electrode plate 200 is 18-300 μm, the thickness of the positive electrode grid 110 is 10-200 μm, and the thickness of the negative electrode grid 210 is 8-200 μm.
The coating height of the positive coating 120 is lower than that of the positive grid 110 to leave a positive tab connection section 111, and the coating height of the negative coating 220 is lower than that of the negative grid 210 to leave a negative tab connection section 211. In this embodiment, the tab may be led out to be welded to the positive and negative terminals through the positive tab connection section 111 and the negative tab connection section 211, or the positive tab connection section and the negative tab connection section of the stacked columnar electrode group may be connected together and then welded to the positive and negative terminals.
The positive grid 110 and the negative grid 210 adopt a perforated or non-perforated structure, and the positive grid 110 and the negative grid 210 adopt lead foils or lead alloy foils or plastic and lead/lead alloy composite films. The positive electrode coating 120 and the negative electrode coating 220 are formed by coating slurry formed by mixing lead powder, positive and negative electrode additives, sulfuric acid and pure water, and the first diaphragm 300 and the second diaphragm 400 are made of glass fiber diaphragms or microporous plastic diaphragms or non-woven fabrics. In the embodiment, the positive electrode coating 120 is a slurry formed by mixing 80-85 wt.% of lead powder, 6-10 wt.% of pure water, 8-12 wt.% of sulfuric acid, and 0.5-2% of a positive electrode additive, wherein the positive electrode additive includes but is not limited to short fibers, colloidal graphite, anisotropic graphite, antimony trioxide, and the like. The negative electrode coating 220 is a slurry formed by mixing 80-85 wt.% of lead powder, 7-10 wt.% of pure water, 7-10 wt.% of sulfuric acid, and 1-2.5 wt.% of negative electrode additives, wherein the negative electrode additives include but are not limited to short fibers, colloidal graphite, barium sulfate, humic acid, lignin, acetylene black, and the like.
The battery case 500 is further included, the folded columnar pole group is placed in the battery case 500, the shape of the battery case 500 is a cylinder, an elliptic cylinder or a cuboid, the battery case 500 is made of an insulating material, and the insulating material is made of ABS engineering plastics, PP plastics or PC plastics. The battery case 500 preferably has a cylindrical shape, which can apply a high assembly pressure, improve the permeability of the electrolyte, further improve the utilization rate of the active material, and also improve the heat dissipation performance of the battery in the charging and discharging processes, thereby effectively reducing the battery swelling caused by thermal runaway and the like, and thus improving the service life of the battery.
The thin film positive grid 110 and the thin film negative grid 210 are coated with active materials with small thickness, so that the utilization rate of the active materials can be greatly improved, and the energy density of the battery is improved. Meanwhile, the battery is internally designed to have no tab and no bus bar, so that the internal resistance is effectively reduced, the weight of the battery is reduced, and the gravimetric specific energy of the battery is further improved. For example, in the present embodiment, the size of the battery cell is 146mm in height and 37mm in diameter, wherein the positive grid 110 is made of lead-calcium alloy, and has a thickness of 100 μm, a length of 1480mm, and a height of 138 mm; the negative grid 210 is made of metal lead, and has a thickness of 80 μm, a length of 1480mm and a height of 138 mm; the coating thickness of one side of the positive electrode coating 120 is 80 μm, and the coating height is 136 mm; the coating thickness of one side of the negative electrode coating 220 is 70 mu m, and the coating height is 136 mm; the thickness of the first and second diaphragms 300 and 400 is 200 μm; the assembly pressure was 50 MPa.
Above-mentioned battery monomer actual test weight is 546g, and 0.5c test capacity is 20.8Ah, and theoretical active material utilization ratio is 65.4%, and the gravimetric specific energy is 76.2Wh/Kg, can know, compares with traditional lead acid battery, the utility model discloses well lead acid battery's performance has very big promotion.
The utility model discloses well lead acid battery's production method includes following step:
s1 preparation of positive and negative plates
Coating a positive electrode coating on the surface of a continuous film-shaped positive electrode grid to obtain a positive plate with the thickness of no more than 300 mu m, and coating a negative electrode coating on the surface of a continuous film-shaped negative electrode grid to obtain a negative plate with the thickness of no more than 300 mu m;
s2, preparing battery cell
Rolling the prepared positive plate and the prepared negative plate into a column shape in a folding and stacking mode, isolating the positive plate and the negative plate by using a first diaphragm and a second diaphragm, and connecting a column-shaped pole group formed by folding and stacking with a positive terminal and a negative terminal to obtain a battery cell;
s3, preparing battery monomer
And (3) putting the battery core into a battery shell, performing acidification formation, and capping with positive and negative cover plates to obtain a battery monomer.
In step S1, the positive grid has a thickness of 10 to 200 μm, the negative grid has a thickness of 8 to 200 μm, the positive plate and the negative plate both have a thickness of 18 to 300 μm, the coating height of the positive coating is lower than the height of the positive grid to leave a positive tab connection section, the coating height of the negative coating is lower than the height of the negative grid to leave a negative tab connection section, and the positive coating and the negative coating are slurries formed by mixing at least lead powder, positive and negative additives, sulfuric acid and pure water.
In step S2, tabs are led out through the positive tab connection section and the negative tab connection section, or the positive tab connection section and the negative tab connection section of the stacked columnar electrode group are connected together, and then welded to the positive and negative terminals, so as to obtain the battery cell.
The battery pack can be formed by connecting the battery cells prepared in the step S3 in series or in parallel. Fig. 5 and 6 show a battery pack formed by connecting in series, and in this embodiment, 7 battery cells are used to form the battery pack. The actual test weight of the storage battery pack is 4487g, the test capacity at 0.5c is 20.6Ah, the theoretical active substance utilization rate is 64.9 percent, and the gravimetric specific energy is 64.3 Wh/Kg. It is known that the performance of a battery pack including a plurality of lead-acid batteries is also greatly improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The high-specific-energy lead-acid storage battery is characterized by comprising a positive plate, a negative plate, a first diaphragm and a second diaphragm, wherein the first diaphragm, the positive plate, the second diaphragm and the negative plate are sequentially stacked and then folded to form a columnar electrode group, the positive plate comprises a film-shaped positive plate grid and a positive coating, the positive coating is coated on the front surface and the back surface of the positive plate grid respectively, the negative coating is coated on the negative plate grid and the back surface of the negative plate grid respectively, the thicknesses of the positive plate and the negative plate are not more than 300 mu m, and the positive coating and the negative coating are formed by coating active substances.
2. The lead-acid battery of claim 1, wherein the folding to form the columnar electrode groups is performed by winding or continuous folding, the positive plate and the negative plate have a thickness of 18-300 μm, the positive plate grid has a thickness of 10-200 μm, and the negative plate grid has a thickness of 8-200 μm.
3. The high specific energy lead-acid battery of claim 1 wherein the positive coating is applied at a height less than the height of the positive grid to leave a positive tab connection and the negative coating is applied at a height less than the height of the negative grid to leave a negative tab connection.
4. The high specific energy lead-acid battery of claim 1 wherein the positive grid and negative grid are perforated or non-perforated and the positive grid and negative grid are lead foil or lead alloy foil or plastic and lead/lead alloy composite film.
5. The high specific energy lead-acid battery of claim 1, wherein said first and second separators are glass fiber separators or microporous plastic separators or non-woven fabrics.
6. The high specific energy lead-acid battery of claim 1, further comprising a battery case into which the packed columnar electrode group is fitted, the battery case being in the shape of a cylinder, an elliptic cylinder, or a rectangular parallelepiped.
7. The lead-acid battery of claim 6, wherein the battery case is made of an insulating material, and the insulating material is ABS engineering plastic or PP plastic or PC plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022730446.3U CN214012978U (en) | 2020-11-23 | 2020-11-23 | High-specific-energy lead-acid storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022730446.3U CN214012978U (en) | 2020-11-23 | 2020-11-23 | High-specific-energy lead-acid storage battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214012978U true CN214012978U (en) | 2021-08-20 |
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| CN202022730446.3U Active CN214012978U (en) | 2020-11-23 | 2020-11-23 | High-specific-energy lead-acid storage battery |
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| Country | Link |
|---|---|
| CN (1) | CN214012978U (en) |
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- 2020-11-23 CN CN202022730446.3U patent/CN214012978U/en active Active
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