CN111354881B - Power battery top cap - Google Patents
Power battery top cap Download PDFInfo
- Publication number
- CN111354881B CN111354881B CN201811568966.XA CN201811568966A CN111354881B CN 111354881 B CN111354881 B CN 111354881B CN 201811568966 A CN201811568966 A CN 201811568966A CN 111354881 B CN111354881 B CN 111354881B
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- CN
- China
- Prior art keywords
- top cover
- power battery
- conductive base
- pole unit
- electrically conductive
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a power battery top cover, which comprises a top cover plate, a first pole unit, a second pole unit, an explosion-proof valve, a liquid injection hole and a lower insulating member, wherein the top cover plate is provided with a pole unit mounting hole, the second pole unit is assembled in the pole unit mounting hole, the second pole unit comprises a conductive module and an elastic insulating sealing piece, the conductive module comprises a conductive base block, an insulating interlayer and a welding metal plate, the elastic insulating sealing piece is arranged between the conductive module and the top cover plate, and the lower insulating member is assembled below the top cover plate.
Description
Technical Field
The invention relates to the field of power batteries, in particular to a top cover of a power battery.
Background
The new energy automobile is rapidly popularized nowadays, but the new energy automobile has many defects in the technical aspect, such as short driving distance of the electric automobile, too high cost of the battery pack, insufficient reliability of the battery pack and the like. In order to improve the defects of the electric vehicle, the energy density of the whole battery pack needs to be improved.
In chinese patent application publication CN107452903A for the problem that current power battery top cap energy density is not high, a single-port power battery top cap is disclosed, upper end part through making the top cap piece is protruding upwards, form the boss with outside conductive connection, only set up an electrode port on the top cap piece, the design of top cap piece has been simplified, energy density has been promoted, but because top cap electrode port does not make any improvement, still use the scheme that utmost point post passed the top cap piece, the base portion of utmost point post is located inside the battery case, the inside space utilization of casing and the energy density of battery have been reduced, utmost point post structure is comparatively complicated, also do not benefit to manufacturing, and manufacturing cost is higher simultaneously.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a power battery top cover, which comprises a top cover plate, a first pole unit, a second pole unit, an explosion-proof valve, a liquid injection hole and a lower insulating member, wherein the top cover plate is provided with a pole unit mounting hole, the second pole unit is assembled in the pole unit mounting hole, the second pole unit comprises a conductive module and an elastic insulating sealing member, the conductive module comprises a conductive base block, an insulating interlayer and a welding metal plate, the conductive base block and the welding metal plate are mutually embedded, sleeved, insulated and injected into a whole, the insulating interlayer is injected and molded between the conductive base block and the welding metal plate, the conductive base block is embedded and embedded inside the welding metal plate, the conductive base block in the conductive module is in a three-layer coaxial or non-coaxial cylindrical step form, and a first cylindrical section, The diameters of the second cylindrical section and the third cylindrical section are sequentially increased, or the conductive base block in the conductive module is in a four-layer coaxial or non-coaxial cylindrical step form, the diameters of the first cylindrical section, the second cylindrical section and the third cylindrical section are sequentially increased, the diameter of the fourth cylindrical section is smaller than that of the pole unit mounting hole in the top cover plate, the elastic insulating sealing element is arranged between the conductive module and the top cover plate, and the lower insulating element is assembled below the top cover plate.
Furthermore, the first pole unit is separately formed, welded on the top cover plate and electrically connected with the top cover plate.
Further, the thickness of the first pole unit is 0.1 mm-10 mm.
Furthermore, the first pole unit and the conductive base block are provided with positioning holes, and the diameter of each positioning hole is 0.3-10 mm.
Furthermore, the thickness of the conductive base block is 0.1 mm-10 mm.
Further, the welding metal plate is provided with a clamping groove and a convex hull.
Further, the insulating sealing element is arranged between the conductive base block and the top cover plate, and the conductive base block is pressed downwards to form sealing.
Further, the second pole piece unit is connected to the top cover sheet through the welding metal plate.
Furthermore, the lower insulating member is formed by injection molding and is provided with two through holes which respectively correspond to the first pole unit and the pole unit mounting hole.
Furthermore, a back-off hole is formed in the top cover sheet, and a rubber column is arranged at a position corresponding to the lower insulating member.
Furthermore, the glue columns are filled in the inverted buckle holes of the top cover plate in a melting mode, and the lower insulating component is fixed with the top cover plate through an adhesive.
The power battery top cover provided by the invention has the advantages that the structure of the battery top cover can be effectively optimized, the single-hole battery top cover is used, the pole unit structure is redesigned, the thickness of the battery top cover is further reduced, the pole base structure is omitted, the problem that the pole base structure occupies the internal space of the power battery is solved, the energy density of the power battery is improved, the production and installation processes are simplified, the production efficiency is improved, and the cost of the power battery top cover is reduced.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a top cover of a power battery.
Fig. 2 is a top view of a power battery top cover.
Fig. 3 is a cross-sectional view of a top cover of a power battery.
Fig. 4 is an expanded view of the structure of the power battery top cover conductive module.
Fig. 5 is a structural schematic diagram of a lower insulating member of a top cover of the power battery.
Fig. 6 is a schematic diagram of a specific structure of a power battery top cover conductive module.
Fig. 7 is another specific structural diagram of the power battery top cover conductive module.
The power battery comprises a power battery top cover 1, a top cover plate 11, a pole unit mounting hole 111, a first pole unit 12, a positioning hole 121, a second pole unit 13, a conductive module 131, a welded metal plate 1311, a first cylindrical section 13111, a second cylindrical section 13112, a third cylindrical section 13113, a fourth cylindrical section 13114, an insulating interlayer 1312, a conductive base block 1313, an elastic insulating sealing element 132, a positioning hole 133, an explosion-proof valve 14, a liquid injection hole structure 15, a lower insulating member 16, a rubber column 161 and a through hole 162.
Detailed Description
To further illustrate the advantages of the present invention, the following detailed description is provided in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc., indicating directions or positional relationships based on those shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific direction, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations on the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection, either a direct connection or an indirect connection. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
As shown in figures 1, 2 and 3, the invention provides a top cover of a power battery, which comprises a top cover plate (11), a first pole unit (12), a second pole unit (13), an explosion-proof valve (14), a liquid injection hole (15) and a lower insulating member (16), wherein the first pole unit (12) is welded on the top cover plate (11), and is electrically connected with the top cover plate (11), the top cover plate (11) is provided with a pole unit mounting hole (111), the second pole unit (13) is assembled in the pole unit mounting hole (111), the second pole column unit comprises a conductive module (131) and an elastic insulating sealing element (132), the conductive module (131) comprises a conductive base block (1311), an insulating interlayer (1312) and a welding metal plate (1313), the elastic insulating sealing element (132) is arranged between the conductive module (131) and the top cover plate (11), and the lower insulating member (16) is assembled below the top cover plate (11).
As shown in the figures 1 and 2, as a preferable scheme of the invention, the first pole unit (12) is formed separately, fixed on the top cover plate (11) in a laser welding mode and electrically connected with the top cover plate (11), the thickness of the first pole unit (12) is 1.0-3.0 mm, the first pole unit (12) is in a circular outer contour, a cylindrical positioning hole (121) is arranged on the first pole unit (12), the inner hole diameter of the positioning hole (121) is 0.5-6.0 mm, and a + mark or a-mark is generated on a platform of the positioning hole (121) by laser engraving so as to facilitate the electrical connection between the secondary battery and an external circuit.
As shown in FIG. 4, as a preferred embodiment of the present invention, the conductive base block (1311) and the welding metal plate (1313) are embedded and insulated from each other and injection molded into a whole, the insulating interlayer (1312) is injection molded between the conductive base block (1311) and the welding metal plate (1313), the conductive base block (1311) is embedded inside the welding metal plate (1313), the welding metal plate (1313) has a slot and a convex hull, and plastic is embedded during injection molding to ensure injection molding strength.
As shown in fig. 5, as another preferred embodiment of the present invention, the lower insulating member (16) is injection molded, the lower insulating member (16) has through holes (162) thereon, which are respectively matched with the first pole unit (12) and the pole unit mounting holes (111), the lower insulating member (16) has glue posts (161) on the plane, the top cover sheet (11) has inverted buckle holes thereon, the glue posts (161) on the lower insulating member (16) are melted and softened by ultrasonic hot melting to enter the inverted buckle holes corresponding to the top cover sheet (11), and the lower insulating member (16) is further fixed by using an adhesive, so as to be fixed on the top cover sheet.
As shown in FIG. 6, as a preferred scheme of the invention, the conductive base block (1311) in the conductive module (131) is in the form of three layers of coaxial or non-coaxial cylindrical steps, and the diameters of the first cylindrical section (13111), the second cylindrical section (13112) and the third cylindrical section (13113) are increased in sequence. The third cylindrical section (13113) is provided with a clamping groove in the outer circumferential direction and is used for nesting plastic; the lower plane of the third cylindrical section (13113) presses the elastic sealing element (132) downwards to the corresponding position of the mounting hole of the top-cover sheet polar unit and reaches a certain compression amount to form sealing, the conductive base block (1311) is made of two layers of aluminum-copper composite materials, part of the lower plane of the third cylindrical section (13113) is made of a copper layer, the thickness of the copper layer is 0.8-2 mm, a cylindrical positioning hole is formed in the conductive base block (1311) and used for positioning during assembly, the diameter of an inner hole of the positioning hole (133) is 0.5-6.0 mm, and a mark of plus or minus is generated on a platform of the positioning hole (133) through laser engraving so that the secondary battery can be electrically connected with an external circuit conveniently.
As shown in fig. 7, as another preferred embodiment of the present invention, the conductive base block (1311) in the conductive module (131) is in the form of four layers of coaxial or non-coaxial cylindrical steps, the diameters of the first cylindrical section (13111), the second cylindrical section (13112) and the third cylindrical section (13113) are sequentially increased, and the diameter of the fourth cylindrical section (13114) is smaller than the diameter of the pole unit mounting hole (111) on the top cover sheet (11); the outer circumference of the third cylindrical section (13113) is provided with a clamping groove for nesting plastic; the elastic sealing element (132) is pressed downwards to the position corresponding to the top cover plate by the abutting surface of the third cylindrical section (13113) and the fourth cylindrical section (13114) and reaches a certain compression amount to form sealing, the conductive base block (1311) is made of two layers of aluminum-copper composite materials, the fourth cylindrical section (13114) is made of copper layers, part of the materials at the lower plane of the third cylindrical section (13113) are copper layers, and the thickness of the copper layers is 0.8-2 mm. The conductive base block is provided with a cylindrical positioning hole for positioning during assembly, the diameter of an inner hole of the positioning hole (133) is 0.5-6.0 mm, and a mark of plus or minus is generated on a platform of the positioning hole (133) through laser engraving so as to facilitate the electrical connection between the secondary battery and an external circuit.
As a further development of the invention, the second pole unit (13) can be mounted from bottom to top from the top cover plate pole unit mounting hole (111) and connected to the top cover plate (11) by means of a welded metal plate (1313).
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (11)
1. The utility model provides a power battery top cap, its characterized in that, includes top cap piece, first utmost point post unit, second utmost point post unit, explosion-proof valve, annotates the liquid hole and insulating component down, be provided with an utmost point post unit mounting hole on the top cap piece, second utmost point post unit assembles in the utmost point post unit mounting hole, second utmost point post unit includes electrically conductive module and elastic insulation sealing member, electrically conductive module includes electrically conductive base piece, insulating interlayer and welding metal sheet, electrically conductive base piece and the welding metal sheet inlays each other and overlaps insulating injection moulding one-tenth an organic whole, insulating interlayer injection moulding in electrically conductive base piece and between the welding metal sheet, electrically conductive base piece nestification in inside the welding metal sheet, in the electrically conductive module electrically conductive base piece is the cylindric step form of the coaxial or disalignment of three-layer, first cylinder section, second cylinder section, The diameters of the third cylindrical sections are sequentially increased, or the conductive base block in the conductive module is in a form of four layers of coaxial or non-coaxial cylindrical steps, the diameters of the first cylindrical section, the second cylindrical section and the third cylindrical section are sequentially increased, the diameter of the fourth cylindrical section is smaller than that of the pole unit mounting hole in the top cover plate, the elastic insulating sealing element is arranged between the conductive module and the top cover plate, and the lower insulating member is assembled below the top cover plate.
2. The power battery top cover according to claim 1, wherein the first pole unit is separately formed, welded on the top cover sheet, and electrically connected with the top cover sheet.
3. The power battery top cover according to claim 1, wherein the thickness of the first pole unit is 0.1 mm-10 mm.
4. The power battery top cover according to claim 1, wherein the first pole unit and the conductive base block are provided with positioning holes, and the diameter of each positioning hole is 0.3-10 mm.
5. The top cover of the power battery as claimed in claim 1, wherein the thickness of the conductive base block is 0.1mm to 10 mm.
6. The power cell header of claim 1, wherein the weld plate has a slot and a convex hull.
7. The top cap of claim 1, wherein the insulating seal is disposed between the conductive base block and the top cap piece, and is pressed down by the conductive base block to form a seal.
8. The power battery top cover of claim 1, wherein the second pole piece unit is connected to the top cover sheet by the weld metal plate.
9. The power battery top cover according to claim 1, wherein the lower insulating member is injection molded and has two through holes corresponding to the first pole unit and the pole unit mounting hole, respectively.
10. The power battery top cover according to claim 1, wherein the top cover sheet is provided with a reversing hole, and the lower insulating member is provided with a glue column at a position corresponding to the lower insulating member.
11. The top cover of the power battery as claimed in claim 10, wherein the glue column is melt-filled in the inverted hole of the top cover sheet, and the lower insulating member is fixed with the top cover sheet by an adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811568966.XA CN111354881B (en) | 2018-12-21 | 2018-12-21 | Power battery top cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811568966.XA CN111354881B (en) | 2018-12-21 | 2018-12-21 | Power battery top cap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111354881A CN111354881A (en) | 2020-06-30 |
| CN111354881B true CN111354881B (en) | 2022-08-09 |
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ID=71195930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811568966.XA Active CN111354881B (en) | 2018-12-21 | 2018-12-21 | Power battery top cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111354881B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290556A (en) * | 2011-07-15 | 2011-12-21 | 山东圣阳电源股份有限公司 | Sealing structure of end post and battery cover of lead-acid storage battery |
| US20130108916A1 (en) * | 2011-11-02 | 2013-05-02 | Jang-Hyun Song | Rechargeable battery |
| JP2014164798A (en) * | 2013-02-21 | 2014-09-08 | Gs Yuasa Corp | Battery and method for manufacturing battery |
| US20150280205A1 (en) * | 2014-04-01 | 2015-10-01 | Samsung Sdi Co., Ltd. | Secondary battery |
| CN106505163A (en) * | 2016-11-30 | 2017-03-15 | 东莞塔菲尔新能源科技有限公司 | A kind of electrokinetic cell coping plate and the assembling structure of pole |
-
2018
- 2018-12-21 CN CN201811568966.XA patent/CN111354881B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290556A (en) * | 2011-07-15 | 2011-12-21 | 山东圣阳电源股份有限公司 | Sealing structure of end post and battery cover of lead-acid storage battery |
| US20130108916A1 (en) * | 2011-11-02 | 2013-05-02 | Jang-Hyun Song | Rechargeable battery |
| JP2014164798A (en) * | 2013-02-21 | 2014-09-08 | Gs Yuasa Corp | Battery and method for manufacturing battery |
| US20150280205A1 (en) * | 2014-04-01 | 2015-10-01 | Samsung Sdi Co., Ltd. | Secondary battery |
| CN106505163A (en) * | 2016-11-30 | 2017-03-15 | 东莞塔菲尔新能源科技有限公司 | A kind of electrokinetic cell coping plate and the assembling structure of pole |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111354881A (en) | 2020-06-30 |
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Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518107 Xinwangda Industrial Park, No.18, Tangjia south, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |
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