CN115714232A - Down-pressure-relief type cylindrical capacitor monomer - Google Patents
Down-pressure-relief type cylindrical capacitor monomer Download PDFInfo
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- CN115714232A CN115714232A CN202211488715.7A CN202211488715A CN115714232A CN 115714232 A CN115714232 A CN 115714232A CN 202211488715 A CN202211488715 A CN 202211488715A CN 115714232 A CN115714232 A CN 115714232A
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- pressure relief
- cover plate
- current collecting
- positive
- collecting disc
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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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Abstract
The invention discloses a lower pressure relief type cylindrical capacitor monomer which comprises a battery cell inserted in a shell, wherein the top of the battery cell is connected with a negative cover plate assembly through a negative current collecting disc, and the bottom of the battery cell is connected with a positive cover plate through a positive current collecting disc; a boss in the center of the positive current collecting disc penetrates out of a central hole of the positive cover plate, a liquid injection hole is formed in the boss, and a rubber plug and an aluminum plug are inserted into the liquid injection hole; the positive cover plate is provided with a pressure relief hole, and an explosion-proof valve plate is arranged in the pressure relief hole; the lower side of the positive current collecting disc is provided with a plurality of convex ribs, and the upper side of the positive current collecting disc is provided with a plurality of concave cavities. The pressure relief structure is arranged at the bottom of the anode end of the single body, and pressure relief is performed in a downward exhaust mode, so that the assembly difficulty is reduced, and the assembly precision is improved; the exhaust and pressure relief performance and capacity density of the monomer are improved; the whole size of the module can be smaller, the requirement on the installation space is reduced, and the whole structure is more compact.
Description
Technical Field
The invention relates to the technical field of energy elements, in particular to a lower pressure relief type cylindrical capacitor monomer.
Background
The energy storage elements include, but are not limited to, ultracapacitors, hybrid battery capacitors, and/or other capacitor and/or battery elements (e.g., lithium ion, lead acid, nickel cadmium, sodium ion, and/or others). The energy storage element is widely applied to various industries such as vehicles, electronic products, energy storage systems, transportation, smart power grids, industrial energy conservation and consumption reduction, and the energy storage element technology is an important factor related to the development of the energy storage element technology.
The capacitor unit is one of the energy storage elements, and generally comprises a housing, a battery cell, an electrolyte, a cover plate, a current collector, a pole and the like. After being connected in series or in parallel, the capacitor monomers are inserted into the bracket to form a capacitor module, and the capacitor module has the advantages of extremely high efficiency, high current capacity, wide voltage range, wide use temperature range, long rewinding service life, long working life, no maintenance, easy maintenance, simple integration, low cost and the like, and has wide development prospect.
The electric capacity monomer is at the during operation, and inevitable can generate heat and make monomer internal pressure or temperature rise, in order to in time carry out the pressure release of exhausting when internal pressure or temperature reach the threshold value, is provided with pressure release structure on the electric capacity monomer usually. The exhaust hole is usually seted up on the negative pole apron of upper end to current cylinder electric capacity monomer, sets up explosion-proof valve on the exhaust hole as pressure release structure, and this kind of cylinder electric capacity monomer of going up pressure release formula has following problem: (1) When the capacitor monomers are connected in series/parallel to form a capacitor module, the capacitor monomers need to be led out and connected from the negative ends, namely when the capacitor module is formed, a plurality of leading-out parts and connecting parts are arranged at the negative ends (top ends) of the capacitor monomers; because the negative cover plate is provided with the exhaust hole, in order to not block or interfere the exhaust and pressure relief of the exhaust hole, the leading-out parts and the connecting part need to avoid the exhaust hole of the negative cover plate when being installed and connected, so that higher requirements are provided for the installation positions and angles of the capacitor single body, the leading-out parts and the connecting part, the assembly difficulty is increased, the assembly and welding references among the parts are not easy to find and unify, larger assembly errors are easy to occur, and the assembly precision is lower; (2) When a module is formed, because the connecting structure of the top negative leading-out end needs to avoid the exhaust hole, enough exhaust and pressure relief space needs to be reserved between the connecting structures of the module, the space size of the top end part of the module cannot be too small, the space occupied by the connecting part of the top end of the module is large, the accommodating space of the capacitor monomer is compressed, the capacitor monomer is designed to be as compact as possible, the space for exhausting and accommodating electrolyte in the capacitor monomer cannot be too large, and the exhaust and pressure relief performance and energy density of the capacitor monomer are reduced; in order to improve the energy density, the overall size of the capacitor unit is enlarged, so that the overall size of the module becomes very large, the requirement on the installation space is high, and the overall structure is not compact enough.
Disclosure of Invention
The applicant provides a pressure release formula cylinder electric capacity monomer under rational in infrastructure to the shortcoming that pressure release formula electric capacity monomer exists on the aforesaid is present, and pressure release structure sets up in the bottom, and the inside exhaust space of monomer is bigger with the electrolyte space, reduces the assembly degree of difficulty when becoming the module, reduces assembly error, improves the assembly precision.
The technical scheme adopted by the invention is as follows:
a lower pressure relief type cylindrical capacitor monomer comprises a battery cell inserted in a shell, wherein the top of the battery cell is connected with a negative cover plate assembly through a negative current collecting disc, and the bottom of the battery cell is connected with a positive cover plate through a positive current collecting disc; a boss in the center of the positive current collecting disc penetrates out of a central hole of the positive cover plate, a liquid injection hole is formed in the boss, and a rubber plug and an aluminum plug are inserted into the liquid injection hole; the positive cover plate is provided with a pressure relief hole, and an explosion-proof valve plate is arranged in the pressure relief hole; the lower side of the positive current collecting disc is provided with a plurality of convex ribs, and the upper side of the positive current collecting disc is provided with a plurality of concave cavities.
As a further improvement of the above technical solution:
the plurality of convex ribs are provided with through holes, and the positions of the holes of all the convex ribs are positioned in the same annular area which takes the center of the positive current collecting disc as the center of a circle; the circular ring area is opposite to the pressure relief hole of the positive cover plate.
The convex plate of the positive current collecting plate is formed by downwards sinking from the plate surface, and a concave cavity is formed on the upper side of the convex plate and forms the concave cavity.
The convex ribs of the positive current collecting disc are arranged in the radial direction and are formed by downwards recessing from the surface of the positive current collecting disc, grooves are formed on the upper sides of the convex ribs, and the grooves form the downwards recessing cavities.
The inner side of the convex rib is connected with the boss, the outer side of the convex rib extends to the outer edge of the positive current collecting plate, and the groove is communicated with the cavity in the center.
The peripheral edge of the positive current collecting disc is provided with a plurality of bending pieces, and the heights of the bending pieces are equal to those of the convex ribs.
The negative pole cover plate assembly comprises an upper cover plate, a transfer plate, a negative pole column head and a connecting column, the transfer plate, the upper cover plate and the negative pole column head are sequentially sleeved on the connecting column, the upper cover plate is fixedly welded on the shell, and the transfer plate is welded with the negative pole current collecting plate.
And insulation pieces are respectively arranged between the upper cover plate and the adapter plate as well as between the cathode column cap and the connecting column.
The negative pole column cap adopts an aluminum piece, and the connecting column adopts a copper column.
The negative cover plate assembly is fixedly connected to the top end of the shell, and the positive cover plate is fixedly connected to the bottom end of the shell.
The invention has the following beneficial effects:
(1) The pressure relief structure is arranged at the bottom of the single positive end, and pressure relief is carried out in a lower exhaust mode, on one hand, the pressure relief structure is arranged at the positive end, and the pressure relief structure is not required to be arranged at the negative end (top end), so that the leading-out part at the negative end and the connecting structure are not required to be avoided when in installation and connection, that is, the requirements on the installation positions and angles of the leading-out part and the connecting part of the capacitor single body are reduced, the positions and angles of the parts are more flexibly arranged, the assembly difficulty is reduced, and the assembly and welding references among the parts are better found and are easier to unify, thereby being more beneficial to reducing the assembly error and improving the assembly precision; on the other hand, as the connecting structure at the negative electrode end does not need to avoid the exhaust hole, the connecting structures of the module can be designed to be more compact, so that the occupied space at the top end of the module is reduced, the accommodating space of the capacitor monomer is increased, the capacitor monomer obtains larger design space, larger space can be arranged in the capacitor monomer for exhausting and accommodating electrolyte, and the exhaust and pressure release performance and capacity density of the monomer are improved; and under the condition of obtaining higher energy density, the whole size of the module can be smaller, the requirement on the installation space is reduced, and the whole structure is more compact. The liquid injection hole and the pressure relief hole are arranged at the bottom and located at the positive electrode end, so that pollution to electrolyte can be avoided.
(2) According to the invention, the convex ribs are arranged on the lower side of the positive current collecting disc, the concave cavity is arranged on the upper side of the positive current collecting disc, so that the space between the bottom of the battery cell and the positive cover plate is effectively utilized, the exhaust space and the exhaust area are increased, the space of electrolyte is also increased, the space utilization rate in the shell is improved, and the pressure relief and exhaust performance and energy density are improved. The convex ribs are used as reinforcing ribs, so that the strength of the positive current collecting disc can be improved, the positive current collecting disc is prevented from deforming, and the power transmission performance is ensured.
(3) The convex rib of the positive current collecting disc is arranged in the annular area opposite to the pressure relief hole, so that the exhaust of the pressure relief hole can be given out, smooth pressure relief and exhaust are ensured, no matter which angle the pressure relief hole rotates to be installed when the positive cover plate is installed, the positive cover plate is not interfered by the convex rib, the limitation on the installation angle of the pressure relief hole is eliminated, the installation of the positive cover plate is more flexible, and the assembly difficulty is reduced; the opening also provides a flow channel for the electrolyte, so that the electrolyte can flow and be distributed to all parts in the shell more conveniently, the distribution uniformity of the electrolyte is improved, and the energy density is improved.
Drawings
Fig. 1 is an exploded view of the present invention.
Fig. 2 is a cross-sectional view of a longitudinal section of the present invention.
Fig. 3 is an enlarged view of a portion a in fig. 2.
Fig. 4 is an enlarged view of a portion B in fig. 2.
Fig. 5 is a perspective view of a top view of the positive current collecting plate.
Fig. 6 is a perspective view of the positive current collecting plate from a top view.
In the figure: 1. a housing; 2. an electric core; 3. a negative current collecting plate;
4. a negative electrode cover plate assembly; 41. an upper cover plate; 42. an adapter plate; 43. a negative pole column cap; 44. connecting columns; 45. a first insulating member; 46. a second insulating member; 47. a third insulating member;
5. a positive current collector; 51. a boss; 52. a liquid injection hole; 53. a concave cavity; 54. a rib is protruded; 55. a groove; 56. opening a hole; 57. a circular ring region; 58. bending the sheet;
6. a positive electrode cover plate; 61. a central bore; 62. a pressure relief vent;
7. an explosion-proof valve plate; 8. a rubber plug; 9. and (4) an aluminum plug.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 and fig. 2, a battery cell 2 is inserted into a casing 1, the top of the battery cell 2 is connected to a negative current collecting plate 3, the negative current collecting plate 3 is connected to a negative cover plate assembly 4, and the negative cover plate assembly 4 is fixedly connected to the top of the casing 1; the bottom of the battery cell 2 is connected with an anode current collecting disc 5, the anode current collecting disc 5 is connected with an anode cover plate 6, and the anode cover plate 6 is fixedly connected to the bottom end of the shell 1.
As shown in fig. 1, 2 and 4, a boss 51 is provided at the center of the bottom surface of the positive current collecting plate 5 in a downward protruding manner, a center hole 61 is provided in the positive cover plate 6, and the boss 51 of the positive current collecting plate 5 penetrates out of the center hole 61 of the positive cover plate 6 and is fixed by welding. The center of the boss 51 of the positive current collecting plate 5 is provided with a liquid injection hole 52, and a rubber plug 8 and an aluminum plug 9 are sequentially inserted into the liquid injection hole 52 from top to bottom. On the positive pole apron 6, be located the centre bore 61 outside and seted up pressure release hole 62, set up explosion-proof valve piece 7 in the pressure release hole 62, when pressure or temperature reach the threshold value in the monomer, carry out the pressure release of exhausting through pressure release hole 62. The pressure relief structure is arranged at the bottom of the positive end of the capacitor, and pressure relief is carried out in a lower exhaust mode, on one hand, the pressure relief structure is arranged at the positive end, and the pressure relief structure does not need to be arranged at the negative end (top end) of the positive end, so that the leading-out part at the end part of the negative electrode and the connecting structure do not need to be avoided when being installed and connected, the requirements on the installation positions and angles of the leading-out part and the connecting part of the capacitor monomer are reduced, the positions and angles of the parts are more flexibly arranged, the assembly difficulty is reduced, the assembly and welding references among the parts are better found and are more easily unified, the assembly error is reduced, and the assembly precision is improved; on the other hand, as the connecting structure at the negative electrode end does not need to avoid the exhaust hole, the connecting structures of the module can be designed to be more compact, so that the occupied space at the top end of the module is reduced, the accommodating space of the capacitor monomer is increased, the capacitor monomer obtains larger design space, larger space can be arranged in the capacitor monomer for exhausting and accommodating electrolyte, and the exhaust and pressure release performance and capacity density of the monomer are improved; and under the condition of obtaining higher energy density, the whole size of the module can be smaller, the requirement on the installation space is reduced, and the whole structure is more compact. The injection hole 52 and the pressure relief hole 62 are arranged at the bottom and at the positive end, so that the electrolyte can be prevented from being polluted.
As shown in fig. 5 and 6, since the boss 51 of the positive electrode current collecting disk 5 is formed to be recessed downward from the plate surface of the positive electrode current collecting disk 5, a recessed cavity 53 is formed above the boss 51. A plurality of radial convex ribs 54 are arranged on the bottom surface of the positive current collecting disc 5 and are downwards protruded on the outer side of the boss 51, the inner side of each convex rib 54 is connected with the boss 51, and the outer side of each convex rib extends to the outer edge of the positive current collecting disc 5; the rib 54 is also formed to be recessed downward from the plate surface of the positive electrode current collecting plate 5, so that a recessed groove 55 is formed on the upper side of the rib 54, and the recessed groove 55 communicates with the cavity 53 at the center. The convex ribs 54 are used as reinforcing ribs, so that the strength of the positive current collecting disc 5 can be improved, the positive current collecting disc 5 is prevented from deforming, and the power transmission performance is ensured; the convex ribs 54 protrude downwards and are blocked between the positive current collecting disc 5 and the positive cover plate 6, so that spaces between the adjacent convex ribs 54 on the lower side of the positive current collecting disc 5 can be used for exhausting, and the exhaust space and the exhaust area are increased; the concave groove 55 formed on the upper side of the boss 51 and the concave cavity 53 formed on the upper side of the convex rib 54 are both concave cavities, so that a space is provided for electrolyte in the single body, and the accommodating space of the electrolyte is increased; namely, the convex rib 54 is arranged at the lower side of the positive current collecting plate 5, and the concave cavity is arranged at the upper side of the positive current collecting plate, so that the space between the bottom of the battery cell 2 and the positive cover plate 6 is effectively utilized, the exhaust space and the exhaust area are increased, the space of electrolyte is also increased, the space utilization rate in the shell 1 is improved, and the pressure relief exhaust performance and the energy density are improved. The convex ribs 54 are provided with through holes 56, the positions of the holes 56 of all the convex ribs 54 are positioned in the same circular ring area 57 with the center of the positive collector plate 5 as the center of a circle, as shown in fig. 2 and 4, the radial position of the pressure relief hole 62 of the positive cover plate 6 corresponds to the position of the circular ring area 57, the pressure relief hole 62 is opposite to the circular ring area 57, because the convex ribs 54 are protruded downwards on the positive collector plate 5, the holes 56 are arranged in the circular ring area 57 opposite to the pressure relief hole 62, the exhaust yielding position of the pressure relief hole 62 can be provided, the smooth pressure relief exhaust is ensured, and the position of the hole 56 of each convex rib 54 is positioned in the circular ring area 57, when the positive cover plate 6 is installed, no matter which angle the pressure relief hole 62 rotates to be installed, the interference of the convex ribs 54 is avoided, the limitation on the installation angle of the pressure relief hole 62 is eliminated, the installation of the positive cover plate 6 is more flexible, and the assembly difficulty is reduced; the openings 56 also provide a flow passage for the electrolyte, which is more beneficial for the electrolyte to flow and distribute to various parts in the shell 1, thereby improving the distribution uniformity of the electrolyte and the energy density. As shown in fig. 5 and 6, the peripheral edge of the positive current collecting disc 5 is bent downward in the axial direction to form a plurality of bending pieces 58, the height of the bending pieces 58 is equal to the height of the convex ribs 54, the bending pieces 58 can further improve the strength of the positive current collecting disc 5, and the bending pieces 58 can also play a role in limiting, so that the space of electrolyte is ensured, and the maximum contact area with the electrolyte is provided.
As shown in fig. 2 and 3, the negative cover plate assembly 4 includes an upper cover plate 41, an adapter plate 42, a negative post head 43, and a connecting post 44, the adapter plate 42, the upper cover plate 41, and the negative post head 43 are sequentially sleeved on the connecting post 44 from bottom to top, the upper cover plate 41 is welded and fixed to the casing 1, and the adapter plate 42 is welded to the negative current collecting plate 3. The upper cover plate 41 is insulated from the adapter plate 42, the negative pole column head 43 and the connecting column 44 by corresponding insulating pieces, a first insulating piece 45 is arranged between the upper cover plate 41 and the negative pole column head 43 as well as between the upper cover plate 41 and the connecting column 44, a second insulating piece 46 is arranged between the bottom surface of the upper cover plate 41 and the corresponding step surface of the connecting column 44, and a third insulating piece 47 is arranged between the upper cover plate 41 and the adapter plate 42. The connecting column 44 is a copper column, and is in contact with the electrolyte in the monomer for conducting electricity, so that the conductivity is good, and electrochemical corrosion cannot occur; the negative pole column cap 43 adopts the aluminum component, and welding performance is good, more does benefit to and uses the aluminum sheet to weld with other monomers of module, and the aluminum component price is lower moreover, and the economic nature is better.
The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, as the invention may be modified in any manner without departing from the spirit thereof.
Claims (10)
1. A lower pressure relief type cylindrical capacitor monomer comprises a shell (1), wherein an electric core (2) is inserted in the shell (1), the top of the electric core (2) is connected with a negative cover plate component (4) through a negative current collecting disc (3), and the bottom of the electric core (2) is connected with a positive cover plate (6) through a positive current collecting disc (5); the method is characterized in that: a boss (51) in the center of the positive current collecting disc (5) penetrates out of a center hole (61) of the positive cover plate (6), a liquid injection hole (52) is formed in the boss (51), and a rubber plug (8) and an aluminum plug (9) are inserted into the liquid injection hole (52); a pressure relief hole (62) is formed in the positive cover plate (6), and an explosion-proof valve plate (7) is arranged in the pressure relief hole (62); the lower side of the positive current collecting disc (5) is provided with a plurality of convex ribs (54), and the upper side is provided with a plurality of concave cavities.
2. The lower pressure relief type cylindrical capacitor cell as claimed in claim 1, wherein: the plurality of convex ribs (54) are provided with through holes (56), and the positions of the holes (56) of all the convex ribs (54) are positioned in the same circular ring area (57) which takes the center of the positive current collecting disc (5) as the center of a circle; the circular ring area (57) is opposite to the pressure relief hole (62) of the positive cover plate (6).
3. The lower pressure relief type cylindrical capacitor cell as claimed in claim 1, wherein: a boss (51) of the positive electrode current collecting plate (5) is formed by being downwards concave from the plate surface, a concave cavity (53) is formed on the upper side of the boss (51), and the concave cavity (53) forms the concave cavity.
4. The lower pressure relief type cylindrical capacitor cell as claimed in claim 1, wherein: the convex rib (54) of the positive current collecting disc (5) is arranged in the radial direction, the convex rib (54) is formed by downwards recessing from the surface of the positive current collecting disc (5), a groove (55) is formed on the upper side of the convex rib (54), and the groove (55) forms the downwards recessing cavity.
5. The lower pressure relief type cylindrical capacitor cell as claimed in claim 4, wherein: the inner side of the convex rib (54) is connected with the boss (51), the outer side of the convex rib extends to the outer edge of the positive current collecting disc (5), and the groove (55) is communicated with the cavity (53) in the center.
6. The lower pressure relief type cylindrical capacitor cell as claimed in claim 1, wherein: the peripheral edge of the positive current collecting disc (5) is provided with a plurality of bending sheets (58), and the height of each bending sheet (58) is equivalent to that of the convex rib (54).
7. The lower pressure relief type cylindrical capacitor cell as claimed in claim 1, wherein: the negative cover plate assembly (4) comprises an upper cover plate (41), a transfer plate (42), a negative pole column head (43) and a connecting column (44), the transfer plate (42), the upper cover plate (41) and the negative pole column head (43) are sequentially sleeved on the connecting column (44), the upper cover plate (41) is welded and fixed on the shell (1), and the transfer plate (42) is welded with the negative pole current collecting disc (3).
8. The downward-pressure-relief cylindrical capacitor cell as defined in claim 7, wherein: insulation pieces are respectively arranged between the upper cover plate (41) and the adapter plate (42), between the negative pole column head (43) and between the upper cover plate and the connecting column (44).
9. The lower pressure relief type cylindrical capacitor cell as claimed in claim 7, wherein: the negative pole column cap (43) adopts an aluminum piece, and the connecting column (44) adopts a copper column.
10. The lower pressure relief type cylindrical capacitor cell as claimed in claim 1, wherein: the negative electrode cover plate assembly (4) is fixedly connected to the top end of the shell (1), and the positive electrode cover plate (6) is fixedly connected to the bottom end of the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211488715.7A CN115714232A (en) | 2022-11-25 | 2022-11-25 | Down-pressure-relief type cylindrical capacitor monomer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211488715.7A CN115714232A (en) | 2022-11-25 | 2022-11-25 | Down-pressure-relief type cylindrical capacitor monomer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115714232A true CN115714232A (en) | 2023-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211488715.7A Pending CN115714232A (en) | 2022-11-25 | 2022-11-25 | Down-pressure-relief type cylindrical capacitor monomer |
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| CN (1) | CN115714232A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116646658A (en) * | 2023-07-27 | 2023-08-25 | 深圳海辰储能控制技术有限公司 | Energy storage device and electric equipment |
-
2022
- 2022-11-25 CN CN202211488715.7A patent/CN115714232A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116646658A (en) * | 2023-07-27 | 2023-08-25 | 深圳海辰储能控制技术有限公司 | Energy storage device and electric equipment |
| CN116646658B (en) * | 2023-07-27 | 2024-01-23 | 深圳海辰储能控制技术有限公司 | Energy storage device and electric equipment |
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