CN217691387U - Novel secondary battery's apron subassembly and secondary battery - Google Patents
Novel secondary battery's apron subassembly and secondary battery Download PDFInfo
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- CN217691387U CN217691387U CN202221248447.7U CN202221248447U CN217691387U CN 217691387 U CN217691387 U CN 217691387U CN 202221248447 U CN202221248447 U CN 202221248447U CN 217691387 U CN217691387 U CN 217691387U
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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 utility model discloses a novel secondary battery cover plate assembly, which comprises a cover plate, a lower insulating part and two groups of pole assemblies, wherein an electrode leading-out hole is arranged on the cover plate, a lower insulating part through hole is arranged on the lower insulating part, and the pole assemblies extend upwards after passing through the lower insulating part through hole and the electrode leading-out hole in sequence; the pole assembly comprises a pole main body, a sealing ring and an upper insulating part; the middle part of the pole main body is upwards protruded and then integrally formed into a pole convex part, the sealing ring is sleeved on the periphery of the pole convex part, after the cover plate is connected with the lower insulating part, the bottom surface of the cover plate is abutted against the top surface of the sealing ring, and the upper insulating part is fixedly connected in a gap between the inner wall of the electrode lead-out hole and the outer side wall of the pole convex part; the pole body of the two groups of pole assemblies are respectively a positive pole and a negative pole which have the same structure; the utility model discloses can avoid positive negative pole electrode terminal and positive negative pole utmost point post's mutual position to remove, guarantee secondary battery's leakproofness, improve secondary battery's life.
Description
Technical Field
The utility model relates to an energy storage device technical field specifically is a novel secondary battery's apron subassembly and secondary battery.
Background
Secondary batteries can be classified into: cylindrical batteries, pouch batteries, and square hard-shell batteries. The three types of packaged secondary batteries have own unique advantages and disadvantages, and have no obvious difference in market distribution. However, with the rapid development of recent years and the drive of faucet enterprises, the proportion of secondary batteries in the form of square hard shell structures is higher and higher, and particularly, the compact PACK form is the important reason for the favor of most engineers. The square hard-shell secondary battery shell comprises a shell body and a cover plate assembly, wherein the battery shell provides a closed space for accommodating an electrode assembly and electrolyte, and the electric energy of the electrode assembly is led out of the closed space from the closed space through an electrode terminal of the cover plate assembly.
In the existing cover plate assembly, the connection modes of the positive and negative leading-out terminals and the positive and negative pole columns are mostly riveted and connected. However, in the actual use process, because the positive and negative terminals and the positive and negative electrode posts have no strict limit structures, the riveted part can slightly rotate, and particularly in the process of passing through the whole life cycle, under the severe environment, the rotation condition can be more serious, so that the looseness can be caused, the sealing failure can be further caused, and the normal use of the secondary battery can be influenced.
Disclosure of Invention
The utility model aims at providing a novel secondary battery's apron subassembly and secondary battery to solve among the prior art.
In order to realize the purpose, the technical scheme of the utility model is that:
a novel cover plate assembly of a secondary battery comprises a cover plate, a lower insulating piece and two sets of pole assemblies, wherein the lower insulating piece is fixedly connected to the bottom surface of the cover plate, an electrode leading-out hole is formed in the cover plate, a lower insulating piece through hole is formed in the lower insulating piece, and the pole assemblies sequentially penetrate through the lower insulating piece through hole and the electrode leading-out hole from bottom to top and then extend upwards;
the pole assembly comprises a pole main body, a sealing ring and an upper insulating part; the middle part of the pole post main body is upwards protruded and then integrally formed into a pole post convex part, the sealing ring is sleeved on the periphery of the pole post convex part, the bottom surface of the sealing ring is mutually attached to the upper surface of the pole post main body, after the cover plate is connected with the lower insulating part, the bottom surface of the cover plate is abutted against the top surface of the sealing ring, and a gap is formed between the inner wall of the electrode lead-out hole and the outer side wall of the pole post convex part; the upper insulating part is fixedly connected in a gap between the inner wall of the electrode leading-out hole and the outer side wall of the pole convex part;
a lower insulating part groove is formed in the bottom surface of the lower insulating part, and the pole post main body is arranged in the lower insulating groove;
the pole bodies of the two groups of pole assemblies are respectively a positive pole and a negative pole which have the same structure.
Further, an electrode terminal is fixedly connected inside the upper insulating member, the bottom surface of the electrode terminal is abutted against the top surface of the electrode convex part, and the electrode terminal comprises a positive electrode terminal and a negative electrode terminal; and a pole center hole is formed in the center of the pole convex part.
Furthermore, an explosion-proof assembly through hole is formed in the cover plate, an explosion-proof assembly is fixedly connected in the explosion-proof assembly through hole, the explosion-proof assembly comprises an explosion-proof valve and an explosion-proof valve protection paster, the explosion-proof valve and the explosion-proof valve protection paster are sequentially arranged in the explosion-proof assembly through hole from bottom to top, and a plurality of explosion-proof valve protection paster through holes are formed in the explosion-proof valve protection paster.
The utility model provides a novel secondary battery, includes foretell apron subassembly and roll up core and two switching pieces, switching piece fixed connection is on the top surface of rolling up the core, and two switching pieces correspond each other with anodal utmost point post, negative pole post respectively, and the bottom surface of anodal utmost point post, negative pole post's bottom surface laminate with the top surface of two switching pieces respectively.
Furthermore, be provided with anodal utmost point ear and negative pole utmost point ear on rolling up the top surface of core, two switching pieces respectively with anodal utmost point ear and negative pole utmost point ear fixed connection.
Further, still include casing and insulating inoxidizing coating, roll up core fixed connection in the casing, insulating inoxidizing coating fixed connection is between the inner wall of casing and the outer wall of rolling up the core, apron subassembly fixed connection is at the upper shed department of casing and will roll up the core and seal in the casing.
Compared with the prior art, the utility model has the advantages and positive effect be:
the utility model discloses an electrode terminals of positive negative pole with the utmost point post main part of positive negative pole is through welding (laser beam welding, resistance welding or ultrasonic bonding) mode fixed connection. The utility model discloses a be provided with the sealing washer between positive negative pole utmost point post and the apron, when the sealing washer compressed to certain thickness, the utmost point post main part of positive negative pole carries out spacing welding after being located lower insulating part recess; the utility model discloses a welding mode replaces current riveting mode, can avoid positive negative pole electrode terminal and the mutual position removal of positive negative pole utmost point post to guarantee secondary battery's leakproofness, improve secondary battery's life.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is an exploded schematic view of a secondary battery according to the present invention;
fig. 2 is a schematic structural view of a cap plate assembly in the secondary battery of fig. 1;
FIG. 3 is an exploded view of the cover plate assembly;
FIG. 4 is a schematic cross-sectional view of the cover plate assembly;
FIG. 5 is a cross-sectional structural view of the electrode terminal assembly of the positive pole of FIG. 4;
FIG. 6 is a schematic diagram of the structure of the positive electrode post;
fig. 7 is an exploded view of the connection structure between the electrode assembly and the cap plate assembly of the secondary battery of the present invention.
In the figure:
1-a cover plate assembly; 11-a cover plate; 111-electrode exit holes; 112-explosion-proof valve assembly through hole; 113-liquid injection hole; 12-a sealing ring; 13-an upper insulator; 14-a lower insulator; 141-lower insulator via; 142-lower insulator groove; 15-pole assembly; 151-pole body; 1512-a post boss; 1513-pole center hole; 1514-groove plane; 1515-pole groove; 16-an explosion-proof valve assembly; 161-explosion-proof valve protection patch; 1611-explosion-proof valve protection patch through hole; 162-an explosion-proof valve; 17-a negative electrode terminal; 18-positive electrode terminal; 2-a shell; 21-an insulating protective layer; 3-an electrode assembly; 31-an interposer; 312-interposer boss; 32-core of roll; 321-a positive electrode tab; 322-negative pole tab.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
As shown in figures 1-7 of the drawings,
as shown in fig. 1, the novel secondary battery generally includes: a cap assembly 1, a case 2, and an electrode assembly 3 located inside the case 2.
In the present embodiment, the housing 2 is made of an aluminum alloy material; the housing 2 has a rectangular box shape, and has an opening at the top to communicate with the accommodating space inside thereof through the opening.
The electrode assembly 3 is formed by winding a positive electrode sheet, a negative electrode sheet, and a separator together, wherein the separator is a film-like insulator interposed between the positive electrode sheet and the negative electrode sheet; in addition, the active material of the positive electrode sheet may be coated on the coating region of the positive electrode sheet, and the active material of the negative electrode sheet may be coated on the coating region of the negative electrode sheet; the part extending from the coating region of the positive plate serves as a positive tab 321; the portion extending from the coated region of the negative electrode tab serves as a negative electrode tab 322.
The insulation protection layer 21 is a thin film type cover layer made of an insulation material and is formed to have a receiving space adapted to the contour of the electrode assembly 3 to maintain electrical insulation between the electrode assembly 3 and the inner wall of the case 2 by covering the insulation protection layer 21 on the outer circumference of the electrode assembly 3.
Fig. 2 is a schematic structural view of a cap plate assembly in the novel secondary battery of fig. 1; FIG. 3 is an exploded schematic view of the cover plate assembly of FIG. 2; fig. 4 is a schematic cross-sectional view of the cover plate assembly of fig. 2 and 3. As shown in fig. 2 to 4, the top cap plate assembly 1 is used to seal the case 2 to seal the electrode assembly 3 within the case 2; the roof panel assembly 1 includes: a cover plate 11, a pole assembly 15, an explosion-proof valve assembly 16 and a lower insulator 14.
The top cover plate 11 is a strip-shaped thin plate, and the external dimension of the top cover plate is matched with the opening of the shell 2 so as to be connected to the opening of the shell 2; the cover plate 11 is made of an aluminum alloy material; in the embodiment, the cover plate 11 is provided with two electrode leading-out holes 111, an explosion-proof valve assembly through hole 112 and a liquid injection hole 113; the explosion proof valve assembly 16 is disposed within the explosion proof valve assembly through bore 112.
In this embodiment, the positive electrode terminal 18 is isolated and insulated from the cover plate 11 by the upper insulating member 13, the positive electrode post body 151 is isolated and insulated from the cover plate 11 by the lower insulating member 14, and then the positive electrode post body 151 and the positive electrode terminal 18 are fixedly connected by welding; the welding means may be one of laser welding, resistance welding or ultrasonic welding. Similarly, the negative electrode terminal 17 is isolated and insulated from the cover plate 11 through the upper insulating member 13, the negative electrode main body is isolated and insulated from the cover plate 11 through the lower insulating member 14, and then the negative electrode terminal is fixedly connected with the negative electrode terminal 17 through a welding mode. The welding mode is one of laser welding, resistance welding or ultrasonic welding.
Referring to fig. 6, preferably, the middle of the pole body 151 protrudes upwards and is integrally formed into a pole protrusion 1512, wherein a positive pole center hole 1513 is disposed at the center of the positive pole protrusion 1512. The positive pole center hole 1513 can ensure accurate positioning during welding, thereby improving the welding yield.
Referring to fig. 6, preferably, in order to ensure the stability of the welding quality of the positive pole body 151 and the positive electrode terminal 18 and ensure that the loss of welding energy is small, that is, the welding energy can be absorbed as much as possible, the groove plane 1514 of the positive pole body 151 is subjected to embossing treatment, wherein the embossing is to roughen the groove plane 1514 by machining or die stamping, so that the energy during welding can be absorbed as much as possible, and accordingly, the welding power of the welding machine is also reduced; as a second solution, embossing treatment can be performed in advance on the groove plane 1514 of the positive electrode post body 151, so that the energy during welding can be absorbed to the maximum extent.
Referring to fig. 2, 3 and 4, the explosion-proof valve assembly 16 includes an explosion-proof valve 162 and an explosion-proof valve protection patch 161, and the explosion-proof valve protection patch 161 is provided with a plurality of explosion-proof valve protection patch through holes 1611; the explosion-proof valve protection patch through holes 1611 are round, square or other shapes, the number of the explosion-proof valve protection patch through holes 1611 is one or more, and the explosion-proof valve protection patch through holes 1611 can be used as an auxiliary structure for detecting whether the sealing effect of the explosion-proof valve meets the requirement or not; when the internal pressure of the secondary battery is excessively large due to gas generation due to overcharge, overdischarge, or overheating of the battery, the explosion-proof valve 162 is broken, so that the gas formed inside the battery cell may be discharged to the outside through the explosion-proof valve protection patch through hole 1611 of the explosion-proof valve assembly 16, whereby the secondary battery can be prevented from being exploded.
The explosion-proof valve protection patch 161 is a thin film, has the same shape as the explosion-proof valve 162, is slightly larger than the explosion-proof valve 162 in size, is provided with back glue on the periphery, is adhered and fixed to the corresponding position on the cover plate 11, and plays a role in preventing dust and protecting the explosion-proof valve 162 from being damaged by the outside.
Referring to fig. 4, 5 and 6, in order to ensure the reliability of the sealing between the pole assembly 15 and the cover plate 11, it is necessary to ensure that the selected sealing ring 12 is assembled within a reasonable compression range; if the compression is not in place, it can lead to seal failure. Therefore, the need to ensure that the sealing ring 12 is in a reasonable compression range after being installed is a key factor for ensuring whether sealing is effective or not; preferably, in order to ensure the compression degree of the sealing ring 12, a lower insulating member groove 142 is formed along the center of the lower insulating member through hole 141, and after the pole assembly 15 is installed, when the sealing ring 12 is compressed to a position where the positive pole body 151 is located in the lower insulating member groove 142, that is, when the sealing ring 12 is compressed to an effective sealing area, the positive pole 151 and the positive electrode terminal 18 are welded; to ensure that the sealing ring 12 is always maintained in an effective sealing region after assembly, thereby ensuring the reliability of the sealing between the pole post assembly 15 and the cover plate 11.
Referring to fig. 6 and fig. 7, preferably, the positive pole projection 1512 is internally a positive pole recess 1515, and the middle of the interposer 31 protrudes upward to form an interposer projection 312; the pole groove 1515 is positioned in cooperation with the adaptor protrusion 312 of the adaptor 31 when the electrode assembly 3 is assembled, so as to ensure that the positive electrode assembly 3 is accurately installed according to the designed position.
Based on the embodiments of the present invention, any modifications, equivalent replacements, improvements, etc. made by other embodiments obtained by a person of ordinary skill in the art without creative efforts shall be included in the protection scope of the present invention.
Claims (6)
1. A novel secondary battery's apron subassembly which characterized in that: the electrode post assembly comprises a cover plate, a lower insulating piece and two groups of electrode post assemblies, wherein the lower insulating piece is fixedly connected to the bottom surface of the cover plate, an electrode leading-out hole is formed in the cover plate, a lower insulating piece through hole is formed in the lower insulating piece, and the electrode post assemblies sequentially penetrate through the lower insulating piece through hole and the electrode leading-out hole from bottom to top and then extend upwards;
the pole component comprises a pole main body, a sealing ring and an upper insulating part; the middle part of the pole post main body is upwards protruded and then integrally formed into a pole post convex part, the sealing ring is sleeved on the periphery of the pole post convex part, the bottom surface of the sealing ring is mutually attached to the upper surface of the pole post main body, after the cover plate is connected with the lower insulating part, the bottom surface of the cover plate is abutted against the top surface of the sealing ring, and a gap is formed between the inner wall of the electrode lead-out hole and the outer side wall of the pole post convex part; the upper insulating piece is fixedly connected in a gap between the inner wall of the electrode leading-out hole and the outer side wall of the pole projection;
a lower insulating part groove is formed in the bottom surface of the lower insulating part, and the pole body is arranged in the lower insulating groove;
the pole body of the two groups of pole assemblies are respectively a positive pole and a negative pole which have the same structure.
2. The cap plate assembly of a novel secondary battery according to claim 1, wherein: the inner part of the upper insulating part is fixedly connected with an electrode terminal, and the bottom surface of the electrode terminal is abutted against the top surface of the electrode convex part; and a central hole of the pole is formed in the central position of the pole convex part.
3. The cap plate assembly of a novel secondary battery according to claim 2, wherein: the explosion-proof assembly is characterized in that an explosion-proof assembly through hole is formed in the cover plate, an explosion-proof assembly is fixedly connected in the explosion-proof assembly through hole and comprises an explosion-proof valve and an explosion-proof valve protection paster, the explosion-proof valve and the explosion-proof valve protection paster are sequentially arranged in the explosion-proof assembly through hole from bottom to top, and a plurality of explosion-proof valve protection paster through holes are formed in the explosion-proof valve protection paster.
4. A novel secondary battery is characterized in that: including the apron subassembly and roll up core and two switching pieces of claim 3, switching piece fixed connection is on the top surface of rolling up the core, and two switching pieces correspond each other with anodal utmost point post, negative terminal post respectively, and the bottom surface of anodal utmost point post, negative terminal post are laminated with the top surface of two switching pieces respectively.
5. The novel secondary battery according to claim 4, characterized in that: and the top surface of the winding core is provided with a positive electrode lug and a negative electrode lug, and the two adapter plates are fixedly connected with the positive electrode lug and the negative electrode lug respectively.
6. The novel secondary battery according to claim 5, characterized in that: the winding core is fixedly connected in the shell, the insulating protective layer is fixedly connected between the inner wall of the shell and the outer wall of the winding core, and the cover plate component is fixedly connected at the upper opening of the shell and seals the winding core in the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221248447.7U CN217691387U (en) | 2022-05-24 | 2022-05-24 | Novel secondary battery's apron subassembly and secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202221248447.7U CN217691387U (en) | 2022-05-24 | 2022-05-24 | Novel secondary battery's apron subassembly and secondary battery |
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| CN217691387U true CN217691387U (en) | 2022-10-28 |
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| CN202221248447.7U Active CN217691387U (en) | 2022-05-24 | 2022-05-24 | Novel secondary battery's apron subassembly and secondary battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663363A (en) * | 2022-11-11 | 2023-01-31 | 厦门海辰储能科技股份有限公司 | Battery end cover assembly, energy storage device and electric equipment |
| CN116259893A (en) * | 2023-05-15 | 2023-06-13 | 江苏正力新能电池技术有限公司 | Top cover, battery, electric equipment and top cover assembly method |
| CN117199654A (en) * | 2023-06-08 | 2023-12-08 | 中创新航科技集团股份有限公司 | Cover plate assembly and battery |
| WO2024175100A1 (en) * | 2023-02-23 | 2024-08-29 | 蜂巢能源科技股份有限公司 | Cylindrical battery |
-
2022
- 2022-05-24 CN CN202221248447.7U patent/CN217691387U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663363A (en) * | 2022-11-11 | 2023-01-31 | 厦门海辰储能科技股份有限公司 | Battery end cover assembly, energy storage device and electric equipment |
| CN115663363B (en) * | 2022-11-11 | 2023-12-22 | 厦门海辰储能科技股份有限公司 | Battery end cover assembly, energy storage device and electric equipment |
| WO2024175100A1 (en) * | 2023-02-23 | 2024-08-29 | 蜂巢能源科技股份有限公司 | Cylindrical battery |
| CN116259893A (en) * | 2023-05-15 | 2023-06-13 | 江苏正力新能电池技术有限公司 | Top cover, battery, electric equipment and top cover assembly method |
| CN117199654A (en) * | 2023-06-08 | 2023-12-08 | 中创新航科技集团股份有限公司 | Cover plate assembly and battery |
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