CN219371177U - Sealing frame of bipolar battery - Google Patents
Sealing frame of bipolar battery Download PDFInfo
- Publication number
- CN219371177U CN219371177U CN202320677679.2U CN202320677679U CN219371177U CN 219371177 U CN219371177 U CN 219371177U CN 202320677679 U CN202320677679 U CN 202320677679U CN 219371177 U CN219371177 U CN 219371177U
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- Prior art keywords
- frame
- sealing
- plate
- liquid injection
- plate frame
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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
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- Filling, Topping-Up Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a sealing frame of a bipolar battery, which relates to the technical field of bipolar batteries and is formed by staggered and overlapped first plate frames and second plate frames; the liquid injection holes of the first plate frame and the second plate frame are respectively positioned at different positions, so that more than two rows of liquid injection holes are formed on the sealing frame formed by superposition, the liquid injection holes are arranged in a staggered manner and do not interfere with each other, and each battery unit corresponds to one liquid injection hole; the port of the liquid injection hole is provided with a sealing plug; the upper end of the sealing plug is provided with a spring, and the upper end of the spring is provided with a pressing plate. The utility model can make the battery unit of the bipolar battery thinner, and more battery units are overlapped and connected in series in unit volume, thereby improving the energy density and the power density of the bipolar battery.
Description
Technical Field
The utility model relates to the technical field of bipolar batteries, in particular to a sealing frame of a bipolar battery.
Background
The bipolar battery is formed by superposing a plurality of sealing frames, the sealing frames are internally and alternately superposed with diaphragms and bipolar pole pieces, and the two sides of the bipolar pole pieces are respectively coated with active substances with different polarities. The battery can be simply understood as a battery formed by stacking a plurality of battery units in series, wherein each battery unit consists of a sealing frame, a bipolar pole piece and a diaphragm; the battery has the characteristics of high voltage, high energy density and high overcurrent capacity.
The voltage level of a bipolar battery is related to the number of cells connected in series, and in order to increase the energy density, it is necessary to reduce the thickness of the cells, thereby realizing the series stacking of more cells in a smaller space.
The battery unit of the existing bipolar battery is provided with a liquid injection hole for injecting electrolyte and discharging redundant gas generated during charging, and the liquid injection hole is provided with a sealing plug, so that the assembly is convenient, and the liquid injection holes on each sealing frame are all arranged at the same position. Because the liquid injection hole occupies a certain thickness space, the thickness of each sealing frame is limited, so that the number of the stacked battery units of the bipolar battery in the same volume is limited, and the voltage of the bipolar battery is limited.
Disclosure of Invention
In view of the above problems, the present utility model provides a sealing frame for a bipolar battery, which can make the battery cells of the bipolar battery thinner, and stack more battery cells in series in a unit volume, thereby improving the energy density and power density of the bipolar battery.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a sealing frame of a bipolar battery is formed by staggered superposition of a first plate frame and a second plate frame; the liquid injection holes of the first plate frame and the second plate frame are respectively positioned at different positions, so that more than two rows of liquid injection holes are formed on the sealing frame formed by superposition, and the liquid injection holes are arranged in a staggered manner and do not interfere with each other; the port of the liquid injection hole is provided with a sealing plug; the upper end of the sealing plug is provided with a spring, and the upper end of the spring is provided with a pressing plate.
Compared with the prior art, the utility model has the beneficial effects that:
in the technical scheme, the two types of plate frames are overlapped in a staggered way, and the liquid injection holes of the two types of plate frames are positioned at different positions, so that the finally formed sealing frame forms more than two rows of liquid injection holes, and the liquid injection holes are arranged in a staggered way, so that the liquid injection holes do not interfere with each other, each battery unit corresponds to one liquid injection hole, and the thickness of the sealing frame can be further reduced; the stacked plate frames in unit volume are more, and the battery units are more, so that the energy density and the power density of the bipolar battery are improved.
As a further improvement of the technical scheme, the side edges of the first plate frame and the second plate frame are respectively provided with a first notch and a second notch; the liquid injection hole of the first plate frame is positioned in the first notch; the liquid injection hole of the second plate frame is positioned in the second notch; and the first notch and the second notch are respectively provided with a pressing plate for pressing the sealing plug.
The improved technical effects are as follows: the first notch and the second notch may facilitate installation and positioning of the platen.
As a further improvement of the technical scheme, the first plate frame and the second plate frame are of a flaky rectangular frame structure, a first sealing groove frame and a second sealing groove frame are arranged on one side face, and a first sealing groove frame and a second sealing groove frame are arranged on the other side face; the first sealing groove frame is matched with the first sealing strip frame; the second sealing strip frame is matched with the second sealing groove frame.
The improved technical effects are as follows: sealing performance between two adjacent sealing frames is improved through double-layer sealing strips, and safety of the battery is improved.
As a further improvement of the technical scheme, the port of the liquid injection hole is provided with a conical counter bore for accommodating a sealing plug; the maximum inner diameter of the counter bore is larger than the plate thickness of the first plate frame or the second plate frame.
The improved technical effects are as follows: the counter bore is used for holding the sealing plug, because the sealing frame plate thickness is smaller, can make the internal diameter of counter bore surpass the thickness of sealing frame plate to make adjacent three sealing frame plates constitute the hole of counter bore jointly.
As a further improvement of the technical scheme, the bottom surface of the pressing plate is provided with a mounting hole for accommodating the spring and the sealing plug.
The improved technical effects are as follows: the mounting holes on the pressing plate are used for positioning and mounting the springs and the sealing plugs, so that the structural stability is improved.
As a further improvement of the technical scheme, an adaptive sealant groove is arranged between the first plate frame and the second plate frame, and the sealant groove is arranged between the first sealing groove frame and the second sealing strip frame.
The improved technical effects are as follows: by arranging the sealant groove, the tightness of the bipolar battery is improved.
Drawings
Fig. 1 is a schematic view of a battery structure formed by the sealing frame.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a schematic view of the internal structure of a battery constructed by the sealing frame.
Fig. 4 is a schematic structural diagram of the stacked three adjacent sealing frames.
Fig. 5 is an enlarged view of a portion B of fig. 4.
Fig. 6 is a schematic diagram of a sealing strip frame structure on two sides of a plate frame.
Fig. 7 is a schematic view of a first plate frame structure.
Fig. 8 is a schematic view of a second plate frame structure.
Fig. 9 is a schematic view of the structure of the liquid injection hole in the plate frame.
Fig. 10 is a schematic view of a platen structure.
In the figure: 1. a first plate frame; 2. a second plate frame; 3. a liquid injection hole; 4. a sealing plug; 5. bipolar pole pieces; 6. a diaphragm; 7. a pressing plate; 8. a bottom plate; 9. a spring; 11. a first notch; 12. a second notch; 13. a first seal groove frame; 14. a second seal bar frame; 15. a first seal strip frame; 16. a second seal groove frame; 31. countersink; 71. and (5) mounting holes.
Detailed Description
In order that those skilled in the art may better understand the technical solutions of the present utility model, the following detailed description of the present utility model with reference to the accompanying drawings is provided for exemplary and explanatory purposes only and should not be construed as limiting the scope of the present utility model.
Embodiment one:
referring to fig. 1 to 10, a sealing frame of a bipolar battery is formed by overlapping a first plate frame 1 and a second plate frame 2 in a staggered manner; the liquid injection holes 3 of the first plate frame 1 and the second plate frame 2 are respectively positioned at different positions, so that two rows of liquid injection holes 3 are formed on a sealing frame formed by superposition, the positions of the two rows of liquid injection holes 3 are staggered and do not interfere with each other, and each battery unit corresponds to one liquid injection hole 3; a sealing plug 4 is arranged at the port of the liquid injection hole 3; the upper end of the sealing plug 4 is provided with a spring 9, and the upper end of the spring 9 is provided with a pressing plate 7.
Specifically, the first plate frame 1 and the second plate frame 2 are both in a flat plate frame shape, and the two side surfaces are provided with sinking grooves for installing the diaphragm 6 and the bipolar pole piece 5; the liquid injection hole 3 is positioned on the same side edge of the first plate frame 1 and the second plate frame 2; the lower end of the sealing plug 4 is a conical head, the upper end of the conical head is provided with a shaft lever, and the shaft lever is sleeved with a spring; the pressing plate 7 is in a long strip shape and is used for pressing the spring 9, so that the spring 9 props against the sealing plug 4, and the sealing plug 4 blocks the liquid injection hole 3; the two ends of the pressing plate 7 are fixed on the outer frame of the bipolar battery through bolts.
The liquid injection holes on the sealing frame formed by the technical scheme are at least two rows, and the two rows of liquid injection holes are distributed in a staggered manner; the number of battery units in the bipolar battery is larger, but the interval between the liquid injection holes in the same row is wide enough.
Specifically, in this technical scheme, bipolar pole piece 5, positive single pole piece and negative single pole piece, diaphragm 6 are assembled into bipolar battery, bipolar pole piece is 14 in this embodiment, even make bipolar battery totally constitute 15 single check, be 1, 2, 3, 4..13, 14, 15 battery unit respectively, two rows of notes liquid hole position stagger arrangement, and first row notes liquid hole corresponds 1, 3, 5, 7, 9, 11, 13, 15 battery unit, and the second row notes liquid hole corresponds 2, 4, 6, 8, 10, 12, 14 battery unit.
Embodiment two:
as shown in fig. 2-5, further optimized on the basis of the above embodiment, the side edges of the first plate frame 1 and the second plate frame 2 are provided with a first notch 11 and a second notch 12; the liquid injection hole 3 of the first plate frame 1 is positioned in the first notch 11; the liquid injection hole 3 of the second plate frame 2 is positioned in the second notch 12; the first notch 11 and the second notch 12 are respectively provided with a pressing plate 7 for pressing the sealing plug 4.
Specifically, a certain interval is reserved between the first notch 11 and the second notch 12; the first notch 11 and the second notch 12 are matched with the pressing plate 7; just snapped into the press plate 7.
Embodiment III:
as shown in fig. 6-8, further optimizing the above embodiment, the first plate frame 1 and the second plate frame 2 are in a sheet rectangular frame structure, a first sealing groove frame 13 and a second sealing groove frame 14 are arranged on one side surface, and a first sealing groove frame 15 and a second sealing groove frame 16 are arranged on the other side surface; the first sealing groove frame 13 is matched with the first sealing strip frame 15; the second seal strip frame 14 mates with a second seal groove frame 16.
Specifically, the first plate frame 1 and the second plate frame 2 have the same size, and only the positions of the liquid injection holes are different; the two side surfaces of the plate frame are provided with sink surfaces for installing the diaphragm 6 and the bipolar pole piece 5; perforations are distributed on the plate frames and are used for fixedly connecting the plate frames after being overlapped and connected in series through bolts; the first sealing strip frame 15 between adjacent plate frames is embedded into the first sealing groove frame 13, and the second sealing strip frame 14 is embedded into the second sealing groove frame 16, so that a sealing ring is formed between the plate frames.
Specifically, a sealing glue groove (not shown in the figure) is arranged between the first plate frame 1 and the second plate frame 2, and the sealing glue groove is arranged between the first sealing groove frame 13 and the second sealing strip frame 14, so that the sealing performance of the bipolar battery is improved.
Embodiment four:
as shown in fig. 9, further optimized on the basis of the above embodiment, the port of the liquid injection hole 3 is provided with a conical counter bore 31 for accommodating the sealing plug 4; the maximum inner diameter of the counter bore 31 is larger than the plate thickness of the first plate frame 1 or the second plate frame 2.
Specifically, the inner diameter of the liquid injection hole 3 is smaller than the minimum thickness of the plate frame; the liquid injection hole 3 penetrates through the inner side edge and the outer side edge of the plate frame; the counter bore 31 is conical and is matched with the end of the sealing plug; the maximum inner diameter of the counter bore 31 is larger than the plate thickness of the first plate frame 1 or the second plate frame 2; the adjacent three plates and frames are overlapped to form a complete counter bore 31.
Fifth embodiment:
as shown in fig. 10, further optimized on the basis of the above embodiment, the bottom surface of the pressing plate 7 is provided with a mounting hole 71 for accommodating the spring 9 and the sealing plug 4.
Specifically, the sealing frame adopts two rows of liquid injection holes for distribution, each plate frame is thinner, and gaps between the liquid injection holes of each row are smaller, so that the plate frames with the same size are more overlapped; in order to accommodate a sufficiently large number of sealing plugs, two pressure plates 7 are used, the gap between the mounting holes 71 in each pressure plate 7 being the same as the gap between the drain holes.
The utility model has the specific working principle that:
in the technical scheme, two sealing frames are overlapped in a staggered way, the two sealing frames are identical in size, and the liquid injection holes are positioned at different positions, so that the finally formed sealing frames form more than two rows of liquid injection holes, and the liquid injection holes are arranged in a staggered way, so that the thickness of the plate frames can be further reduced, the number of the overlapped plate frames in unit volume is more, and meanwhile, the sealing plugs in the liquid injection holes can be normally installed; more battery cells are used to increase the energy density and power density of the bipolar battery.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. The foregoing is merely illustrative of the preferred embodiments of this utility model, and it is noted that there is objectively no limit to the specific structure disclosed herein, since numerous modifications, adaptations and variations can be made by those skilled in the art without departing from the principles of the utility model, and the above-described features can be combined in any suitable manner; such modifications, variations and combinations, or the direct application of the inventive concepts and aspects to other applications without modification, are contemplated as falling within the scope of the present utility model.
Claims (4)
1. A sealing frame of a bipolar battery is characterized by being formed by staggered superposition of a first plate frame (1) and a second plate frame (2); the liquid injection holes (3) of the first plate frame (1) and the second plate frame (2) are respectively positioned at different positions, so that two rows of liquid injection holes (3) and more liquid injection holes (3) are formed on a sealing frame formed by superposition, the positions of the liquid injection holes (3) are staggered and do not interfere with each other, and each battery unit corresponds to one liquid injection hole (3); a sealing plug (4) is arranged at the port of the liquid injection hole (3); the upper end of the sealing plug (4) is provided with a spring (9), and the upper end of the spring (9) is provided with a pressing plate (7).
2. The sealing frame of a bipolar battery according to claim 1, wherein the side edges of the first plate frame (1) and the second plate frame (2) are provided with a first notch (11) and a second notch (12); the liquid injection hole (3) of the first plate frame (1) is positioned in the first notch (11); the liquid injection hole (3) of the second plate frame (2) is positioned in the second notch (12); the first notch (11) and the second notch (12) are both provided with a pressing plate (7) for pressing the sealing plug (4).
3. The sealing frame of the bipolar battery according to claim 1, wherein the first plate frame (1) and the second plate frame (2) are of a sheet-shaped rectangular frame structure, a first sealing groove frame (13) and a second sealing groove frame (14) are arranged on one side surface, and a first sealing groove frame (15) and a second sealing groove frame (16) are arranged on the other side surface; the first sealing groove frame (13) is matched with the first sealing strip frame (15); the second sealing strip frame (14) is matched with the second sealing groove frame (16).
4. The sealing frame of a bipolar battery according to claim 1, characterized in that the port of the filler hole (3) is provided with a conical counter bore (31) for receiving a sealing plug (4); the maximum inner diameter of the counter bore (31) is larger than the plate thickness of the first plate frame (1) or the second plate frame (2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320223564 | 2023-02-16 | ||
| CN2023202235646 | 2023-02-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219371177U true CN219371177U (en) | 2023-07-18 |
Family
ID=87141697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320677679.2U Active CN219371177U (en) | 2023-02-16 | 2023-03-31 | Sealing frame of bipolar battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219371177U (en) |
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2023
- 2023-03-31 CN CN202320677679.2U patent/CN219371177U/en active Active
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