CN220138349U - Grid structure of bipolar battery - Google Patents
Grid structure of bipolar battery Download PDFInfo
- Publication number
- CN220138349U CN220138349U CN202321595842.7U CN202321595842U CN220138349U CN 220138349 U CN220138349 U CN 220138349U CN 202321595842 U CN202321595842 U CN 202321595842U CN 220138349 U CN220138349 U CN 220138349U
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- China
- Prior art keywords
- positive
- negative
- paste coating
- coating area
- gluten
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- 108010068370 Glutens Proteins 0.000 claims abstract description 44
- 235000021312 gluten Nutrition 0.000 claims abstract description 44
- 239000011248 coating agent Substances 0.000 claims abstract description 39
- 238000000576 coating method Methods 0.000 claims abstract description 39
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 241000270708 Testudinidae Species 0.000 abstract description 4
- 239000002253 acid Substances 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005213 imbibition Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 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
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- Secondary Cells (AREA)
Abstract
The utility model relates to a bipolar battery grid structure, which comprises a functional grid substrate, wherein a positive paste coating area is arranged on the positive plate surface on one side of the functional grid substrate, a negative paste coating area is arranged on the negative plate surface on the other side of the functional grid substrate, more than two positive plate gluten are arranged in the positive paste coating area, and more than two negative plate gluten are arranged in the negative paste coating area; the positive plate surface of the functional grid substrate is provided with a positive plate surface, the negative plate surface of the functional grid substrate is provided with a negative plate surface, and the negative plate surface of the functional grid substrate is provided with a positive plate surface. The advantages are that: the bipolar plate battery positive electrode surface can be restrained from growing up, so that the problem that the polar plate is changed into a tortoise shell shape, the negative electrode surface is sunken, and the separator is pierced to generate short circuit is effectively solved.
Description
Technical Field
The utility model relates to the technical field of bipolar batteries, in particular to a grid structure of a bipolar battery.
Background
The bipolar battery is a battery composed of a bipolar plate, a positive single-polarity plate, a negative single-polarity plate, a separator and electrolyte, wherein the bipolar plate is formed by respectively coating positive paste and negative paste on two sides of a substrate. The minimum single voltage of the lead-acid battery is 2V, and the minimum single bipolar battery is a 4V battery formed by a bipolar plate and two unipolar plates. And 6 single 12 plates are needed for the single polarity of the 12V battery, and the bipolar is only needed to be carried out by 5 bipolar plates and 2 single polar plates corresponding to two sides. The bipolar battery has the obvious advantage of reducing the number of grids and the weight of lead parts of the busbar.
An important failure mode of bipolar batteries is that the face of the positive plate grows after a period of use. Because the bipolar plate needs to be filled with positive and negative lead paste, the positive electrode surface grows up along with the increase of the using cycle times of the battery, and the following reasons are that: firstly, oxidation corrosion of a grid in the charging process, in addition, positive active substance pbo2 in the discharging process is converted into pbso4 to generate volume expansion, oxygen is separated out during charging of a lead-acid storage battery, and the active substance of a polar plate and the grid are oxidized by the oxygen, so that pb on the surface of the grid is oxidized into a pbox (x is more than or equal to 1 and less than or equal to 2) oxidation corrosion film, and because the pbox has a larger molar volume than pb, stress is generated to cause the deformation and growth of the grid. In addition, the positive electrode active material pbo2 is converted into pbso4 having a larger molar volume upon discharge, and expansion occurs to cause the deformation and growth of the electrode plate. Finally, the whole bipolar plate gradually becomes a tortoise shell shape, the negative electrode surface is sunken, and then the separator is punctured to generate short circuit, so that the service life of the bipolar battery is influenced.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a bipolar battery grid structure which can inhibit the positive electrode surface of a bipolar plate battery from growing up, thereby effectively solving the problems that the polar plate is changed into a tortoise shell shape, the negative electrode surface is sunken, and the separator is punctured to generate short circuit.
In order to achieve the above object, the present utility model is a bipolar battery grid structure, which comprises a functional grid substrate, wherein a positive paste coating area is arranged on a positive plate surface on one side of the functional grid substrate, a negative paste coating area is arranged on a negative plate surface on the other side of the functional grid substrate, more than two positive plate gluten are arranged in the positive paste coating area, the height of the positive plate gluten is smaller than the depth of the positive paste coating area, more than two negative plate gluten are arranged in the negative paste coating area, and the height of the negative plate gluten is smaller than the depth of the negative paste coating area; the positive plate surface of the functional grid substrate is provided with a positive plate surface, the negative plate surface of the functional grid substrate is provided with a negative plate surface, and the negative plate surface of the functional grid substrate is provided with a positive plate surface.
In the technical scheme, the width L1 of the upper concave region and the width L2 of the lower concave region are 3-10mm.
In the technical scheme, the included angle a between the upper buffer zone and the vertical plane and the included angle b between the lower buffer zone and the vertical plane are both 10-20 degrees.
In the technical scheme, the positive paste coating area and the negative paste coating area are both trapezoidal, the positive plate gluten and the negative plate gluten are both in a table shape, the volume of the negative plate gluten is smaller than that of the positive plate gluten, the top end of the positive plate gluten is lower than 0.1-0.3mm of the top surface of the positive paste coating area, and the top end of the negative plate gluten is lower than 0.1-0.3mm of the top surface of the negative paste coating area.
Compared with the prior art, the utility model has the advantages that: the bipolar plate battery positive electrode surface can be restrained from growing up, so that the problem that the polar plate is changed into a tortoise shell shape, the negative electrode surface is sunken, and the separator is pierced to generate short circuit is effectively solved.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Description of the embodiments
The following describes the embodiments of the present utility model further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present utility model, but is not intended to limit the present utility model. In addition, technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
In the description of the present utility model, the azimuth or positional relationship indicated by the terms "upper" and "lower" and the like are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and do not require that the present utility model must be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.
As shown in fig. 1, the bipolar battery grid structure comprises a functional grid substrate 1, wherein a positive paste coating area 2 is arranged on a positive plate surface on one side of the functional grid substrate 1, a negative paste coating area 6 is arranged on a negative plate surface on the other side of the functional grid substrate 1, nine positive plate gluten 3 are arranged in the positive paste coating area 2, the height of the positive plate gluten 3 is smaller than the depth of the positive paste coating area 2, nine negative plate gluten 7 are arranged in the negative paste coating area 6, and the height of the negative plate gluten 7 is smaller than the depth of the negative paste coating area 6; the upper end of the positive plate surface on one side of the functional grid substrate 1 is provided with an imbibition upper concave area 9, the lower end of the positive plate surface on one side of the functional grid substrate 1 is provided with an imbibition lower concave area 4, the upper end of the negative plate surface on the other side of the functional grid substrate 1 is provided with an upper buffer area 8 inclining to the positive plate surface, and the lower end of the negative plate surface on the other side of the functional grid substrate 1 is provided with a lower buffer area 5 inclining to the positive plate surface. The number of the positive electrode plate gluten 3 and the negative electrode plate gluten 7 may be three, four, five, six, etc., depending on the actual situation.
During production, positive paste is coated in a positive paste coating area 2, positive plate gluten 3 supports lead paste and enhances conductivity, negative paste is coated in a negative paste coating area 6, and negative plate gluten 7 supports lead paste and enhances conductivity; the upper concave region 9 and the lower concave region 4 provide a certain buffer region even if the upper buffer region 8 and the lower buffer region 5 are slightly bent, and the service life of the bipolar battery is prolonged;
in this embodiment, the width L1 of the upper concave region 9 and the width L2 of the lower concave region 4 are both 5mm, and may be selected according to practical situations, for example, 3mm, 4mm, 6mm, 8 mm, 10mm, etc.
In this embodiment, the included angle a between the upper buffer area 8 and the vertical plane and the included angle b between the lower buffer area 5 and the vertical plane are both 10-20 °. The included angle a and the included angle b can be selected according to practical situations and can be 10 degrees, 15 degrees and 20 degrees.
In this embodiment, the positive paste coating area 2 and the negative paste coating area 6 are both trapezoidal, the positive plate gluten 3 and the negative plate gluten 7 are both in a table shape, the volume of the negative plate gluten 7 is smaller than that of the positive plate gluten 3, the top end of the positive plate gluten 3 is lower than the top surface 0.1-0.3mm of the positive paste coating area 2, and the top end of the negative plate gluten 7 is lower than the top surface 0.1-0.3mm of the negative paste coating area 6, so that the grid is prevented from directly contacting with electrolyte, and the grid speed is reduced. The number of the top ends of the positive plate gluten 3 lower than the top surface of the positive paste coating region 2 and the number of the top ends of the negative plate gluten 7 lower than the top surface of the negative paste coating region 6 can be selected according to the implementation conditions, and can be 0.1mm, 0.2mm and 0.3mm.
During production, the positive plate gluten 3 and the negative plate gluten 7 are in a table shape, so that demolding is convenient. The volume of the negative plate gluten 7 is smaller than that of the positive plate gluten 3, because the negative plate is less corroded to the negative plate gluten 7, waste of raw materials is reduced, and the positive plate gluten is oxidized while being corroded.
The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made hereto without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (4)
1. The bipolar battery grid structure comprises a functional grid substrate (1), wherein a positive paste coating area (2) is arranged on a positive plate surface on one side of the functional grid substrate (1), a negative paste coating area (6) is arranged on a negative plate surface on the other side of the functional grid substrate (1), more than two positive plate gluten (3) are arranged in the positive paste coating area (2), the height of each positive plate gluten (3) is smaller than the depth of the positive paste coating area (2), more than two negative plate gluten (7) are arranged in the negative paste coating area (6), and the height of each negative plate gluten (7) is smaller than the depth of the negative paste coating area (6); the positive plate surface structure is characterized in that an upper sunk area (9) which is swelled is arranged at the upper end of the positive plate surface on one side of the functional grid substrate (1), a lower sunk area (4) which is swelled is arranged at the lower end of the positive plate surface on one side of the functional grid substrate (1), an upper buffer area (8) which is inclined towards the positive plate surface is arranged at the upper end of the negative plate surface on the other side of the functional grid substrate (1), and a lower buffer area (5) which is inclined towards the positive plate surface is arranged at the lower end of the negative plate surface on the other side of the functional grid substrate (1).
2. The bipolar battery grid structure according to claim 1, wherein the width L1 of the upper recessed area (9) and the width L2 of the lower recessed area (4) are each 3-10mm.
3. The bipolar battery grid structure according to claim 1, wherein the angle a between the upper buffer zone (8) and the vertical plane and the angle b between the lower buffer zone (5) and the vertical plane are both 10-20 degrees.
4. The bipolar battery grid structure according to claim 1, wherein the positive paste coating area (2) and the negative paste coating area (6) are both trapezoid, the positive plate gluten (3) and the negative plate gluten (7) are both table-shaped, the volume of the negative plate gluten (7) is smaller than that of the positive plate gluten (3), the top end of the positive plate gluten (3) is 0.1-0.3mm lower than the top surface of the positive paste coating area (2), and the top end of the negative plate gluten (7) is 0.1-0.3mm lower than the top surface of the negative paste coating area (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321595842.7U CN220138349U (en) | 2023-06-21 | 2023-06-21 | Grid structure of bipolar battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321595842.7U CN220138349U (en) | 2023-06-21 | 2023-06-21 | Grid structure of bipolar battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220138349U true CN220138349U (en) | 2023-12-05 |
Family
ID=88963483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321595842.7U Active CN220138349U (en) | 2023-06-21 | 2023-06-21 | Grid structure of bipolar battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220138349U (en) |
-
2023
- 2023-06-21 CN CN202321595842.7U patent/CN220138349U/en active Active
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