CN212342702U - Battery cap and battery using same - Google Patents
Battery cap and battery using same Download PDFInfo
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- CN212342702U CN212342702U CN202020785443.7U CN202020785443U CN212342702U CN 212342702 U CN212342702 U CN 212342702U CN 202020785443 U CN202020785443 U CN 202020785443U CN 212342702 U CN212342702 U CN 212342702U
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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 utility model provides a battery cap and use battery of this block, wherein the battery includes casing, electric core and battery cap. The shell is a hollow cylindrical structure with one open end and is used for mounting components; the battery cell is arranged inside the shell and used for providing electric energy; the battery cap comprises a metal connecting piece and an insulating plastic piece. The metal connecting piece is arranged at one end of the opening of the battery shell and is used for leading out an electrode of the battery core; insulating plastic part is used for the inner wall insulation protection with metal connecting piece and casing, and wherein metal connecting piece includes connecting portion, and connecting portion are located metal connecting piece's center department for be connected with electric core, and connecting portion from outer to being equipped with explosion-proof groove inwards. The battery cap of the utility model has exquisite design, the thickness of the finished product of the cap is reduced, and the production and assembly are convenient; and the shell can accommodate larger battery cells, so that the battery capacity is greatly increased.
Description
Technical Field
The utility model relates to a battery field, in particular to battery cap and use battery of this block.
Background
A battery is a device that can convert chemical energy into electrical energy, and has a positive electrode and a negative electrode. Along with the progress of science and technology, people's life is more and more intelligent and convenient, and the amount of labour of people has significantly reduced in the appearance of various domestic appliance, and the battery is one of the indispensable configuration of electrical equipment continuation of the journey.
The existing cap assembly for the columnar battery is complex in structure, complex in assembly process and low in comprehensive assembly efficiency, and the production cost of the battery is greatly improved; and the conventional battery cap assembly has poor explosion-proof effect and low safety.
Therefore, it is desirable to provide a battery cap and a battery using the same to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a battery cap and use battery of this block, its positive pole utmost point ear of deriving electric core through the metal connecting piece in the battery cap, insulating plastic part is sealed metal connecting piece and battery case, and metal connecting piece from outer toward being provided with explosion-proof groove inwards to the battery that solves among the prior art has many block subassembly structures complicacy, and assembly process is loaded down with trivial details, and the poor problem of explosion-proof effect of traditional battery cap subassembly.
In order to solve the technical problem, the utility model adopts the technical scheme that: a battery cap for sealing an opening of a battery case and leading out an electrode of a battery cell, wherein the battery cap comprises:
the metal connecting piece is arranged at one end of the opening of the battery shell and is used for leading out an electrode of the battery core; and the number of the first and second groups,
the insulating plastic part is used for insulating and protecting the metal connecting part and the inner wall of the battery shell;
the metal connecting piece comprises a connecting part, and the connecting part is positioned at the center of the metal connecting piece and is used for being connected with a positive electrode lug of a battery cell;
the connecting part is provided with an explosion-proof groove from outside to inside.
The utility model discloses in, insulating plastic part encircles the setting and is in the metal connecting piece outer lane, just insulating plastic part parcel is in the metal connecting piece is peripheral.
In the utility model, the section of the anti-explosion groove is in an annular, U-shaped or linear structure along the plane of the metal connecting piece,
the length of the cross section of the opening of the explosion-proof groove is greater than or equal to the length of the cross section of the bottom end of the explosion-proof groove.
The utility model discloses in, the metal connecting piece does not set up explosion-proof groove is regional the thickness of connecting portion is between 0.2mm ~ 1mm, sets up explosion-proof groove is regional the thickness of connecting portion is between 0.02mm ~ 0.2 mm.
The utility model discloses in, the metal connecting piece outside is equipped with the strengthening rib, is used for increasing metal connecting piece's intensity.
The utility model discloses in, insulating plastic part includes:
the first end part is arranged at one end of the insulating plastic part, extends along one side of the metal connecting part and is used for isolating and insulating the outer side of the metal connecting part from the inner wall of the battery shell;
a second end part arranged at the other end of the insulating plastic part and extending along the other side surface of the metal connecting part for isolating and insulating the inner side of the metal connecting part from the inner wall of the battery shell, and
the middle connecting part is arranged in the middle of the insulating plastic part and used for connecting the first end part with the second end part, and the middle connecting part is arranged around the metal connecting part and used for isolating and insulating the periphery of the metal connecting part from the inner wall of the battery shell.
The utility model discloses in, the first end is close to metal connecting piece one side is equipped with the screens strengthening rib, the screens strengthening rib with the metal connecting piece outside contact, just the screens strengthening rib is used for the extrusion metal connecting piece, with will the first end with metal connecting piece is sealed fixed.
In the utility model, one side of the second end part close to the metal connecting piece is provided with at least one sealing rib, and the sealing rib is connected with the inner side of the metal connecting piece; the sealing rib is used for sealing and fixing the first end part and the inner side of the metal connecting piece.
The utility model also provides a battery, it includes:
the shell is used for mounting components and is of a hollow cylindrical structure with one open end;
the battery cell is arranged in the shell and used for providing electric energy, and the battery cell comprises a positive electrode lug and a negative electrode lug; and the number of the first and second groups,
the battery cap as described above, for sealing the opening of the case;
the battery cell is of a spiral columnar structure, a positive electrode lug of the battery cell is connected with the battery cap, and a negative electrode lug of the battery cell is connected with the shell.
The battery with the battery cap has the advantages that the contact internal resistance is reduced, the thickness of a finished product of the cap is reduced, and a larger battery cell can be accommodated in the shell, so that the capacity of the battery is greatly increased.
The utility model discloses in, the height of battery with the diameter proportion of battery is less than or equal to 1, can satisfy the demand of the part button cell on the market.
The utility model discloses compare in the traditional block subassembly that is equipped with two metalworks at least, its beneficial effect is: the cap in the utility model has only one metal connecting piece inside, the cap has simple structure and exquisite design, and the thickness of the finished cap product can be effectively reduced; therefore, the problems that the structure of a cap assembly is complex and the assembly process is complex in the battery in the prior art are solved. And the connecting portion of metal connecting piece in this embodiment outwards is equipped with explosion-proof groove inwards from outside, has promoted the explosion-proof effect of cap subassembly, and the security of battery use is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding drawings of some embodiments of the present invention.
Fig. 1 is a perspective view of a battery according to a first embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of the overall structure of a first embodiment of the battery of the present invention.
Fig. 3 is an enlarged view of a structure of fig. 2.
Fig. 4 is an exploded view of the overall structure of the first embodiment of the battery of the present invention.
Fig. 5 is a schematic structural view of the battery according to the first embodiment of the present invention before the case is press-sealed to form the sealing structure.
Fig. 6 is a perspective view of a battery according to a second embodiment of the present invention.
Fig. 7 is a schematic cross-sectional view of the overall structure of a second embodiment of the battery of the present invention.
Fig. 8 is an enlarged view of the structure at B of fig. 7.
Fig. 9 is an exploded view of the overall structure of a second embodiment of the battery of the present invention.
Fig. 10 is an exploded view of the overall structure of a second embodiment of the battery of the present invention.
Fig. 11 is a perspective view of a battery according to a third embodiment of the present invention.
Fig. 12 is a schematic cross-sectional view of the overall structure of a third embodiment of the battery of the present invention.
Fig. 13 is an enlarged view of the structure at C of fig. 12.
Fig. 14 is an exploded view of the overall structure of a third embodiment of the battery of the present invention.
Fig. 15 is a schematic structural view of the insulating plastic member before the housing of the first embodiment of the battery of the present invention is stamped to form the sealing structure.
Fig. 16 is an enlarged view of the structure at D in fig. 15.
Reference numerals: reference numbers for the first embodiment: the battery pack comprises a shell 11, a sealing structure 111, a rolling groove 112, a bottom plate 113, a cylindrical side wall 116, an opening 1161, a rolling groove part 1162, a containing part 1163, a battery cell 12, a positive electrode tab 121, a negative electrode tab 122, a first insulating sheet 123, a second insulating sheet 124, a battery cap 13, a metal connector 131, a connecting part 1311, an explosion-proof groove 1311a, a reinforcing rib 1312, an insulating plastic part 132, a first end part 1321, an intermediate connecting part 1322, a second end part 1323 and a sealing rib 13231.
Reference numerals of the second embodiment: the battery comprises a shell 21, a sealing structure 211, a first support 212, a first extension part 2121, a first support part 2122, a bottom plate 213, a battery cell 22, a positive electrode tab 221, a negative electrode tab 222, a first insulation sheet 223, a second insulation sheet 224, a battery cap 23, a metal connector 231, a connecting part 2311, an explosion-proof groove 2311a, a reinforcing rib 2312, an insulation plastic part 232, a first end part 2321, an intermediate connecting part 2322, a second end part 2323 and a sealing rib 23231.
Third embodiment reference numerals: the battery comprises a shell 31, a sealing structure 311, a second bracket 312, a second extending portion 3121, a second supporting portion 3122, a pressure plate 313, a battery cell 32, a positive electrode tab 321, a negative electrode tab 322, a first insulating sheet 323, a second insulating sheet 324, a battery cap 33, a metal connector 331, a connecting portion 3311, an explosion-proof slot 3311a, a reinforcing rib 3312, an insulating plastic part 332, a first end portion 3321, an intermediate connecting portion 3322, a second end portion 3323, and a sealing rib 33231.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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 the skilled in the art without creative work belong to the protection scope of the present invention.
In the drawings, elements having similar structures are denoted by the same reference numerals.
The terms "first," "second," and the like in the terms of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, nor should they be construed as limiting in any way.
Referring to fig. 1, fig. 2 and fig. 3, wherein fig. 1 is a perspective view of a battery according to a first embodiment of the present invention, fig. 2 is a schematic cross-sectional view of the overall structure of the battery according to the first embodiment of the present invention, and fig. 3 is an enlarged schematic view of a structure at a position a of fig. 2. As follows, the utility model provides a pair of can solve above technical problem's battery:
referring to fig. 1, the battery in the present embodiment includes a case 11, a battery cell 12, and a battery cap 13. The shell 11 is a hollow cylindrical structure with one open end and is used for mounting components; the battery cell 12 is disposed inside the casing 11 and configured to provide electric energy, the battery cell 12 in this embodiment is a spiral columnar structure, and the battery cell 12 includes a positive electrode tab 121 and a negative electrode tab 122; the battery cap 13 is used for sealing the opening of the casing 11 and leading out the positive electrode of the battery cell 12. The positive electrode tab 121 of the battery cell 12 is connected to the battery cap 13, and the negative electrode tab 122 of the battery cell 12 is connected to the casing 11.
The battery cap 13 includes a metal connector 131 and an insulating plastic member 132. The metal connecting piece 131 is arranged at one end of the opening of the battery shell 11 and is used for connecting a positive electrode tab of the battery cell 12; the insulating plastic member 132 is used for insulating and protecting the metal connecting member 131 and the inner wall of the housing 11, wherein the metal connecting member 131 includes a connecting portion 1311, the connecting portion 1311 is located at the center of the metal connecting member 131, the connecting portion 1311 is connected to the positive electrode tab 121 of the battery cell 12, and the connecting portion 1311 is provided with an explosion-proof groove 1311a from outside to inside, that is, the explosion-proof groove 1311a in this embodiment extends from the inside of the metal connecting member 131 close to the battery cell 12 to the outside of the metal connecting member 131 away from the battery cell 12.
With reference to fig. 3 and 4, fig. 3 is an enlarged schematic view of a structure at a point a in fig. 2, and fig. 4 is an exploded view of the overall structure of the first embodiment of the battery of the present invention. The structure of the housing 11 in the first embodiment will be explained in detail:
an opening at one end of the casing 11 in this embodiment is provided with a sealing structure 111, and the sealing structure 111 is used to limit the position of the battery cap 13, so as to prevent the battery cap 13 from falling off from the casing 11. The inner wall of the housing 11 in this embodiment is provided with a rolling groove 112 around the opening, and the rolling groove 112 is used for supporting the battery cap 13.
In this embodiment, the case 11 in this embodiment is a steel case, and the case 11 includes a bottom plate 113 opposite to the battery cap.
In addition, the ratio of the height to the diameter of the battery in the embodiment is less than or equal to 1 so as to meet the requirements of part of button batteries on the market.
Referring to fig. 5, fig. 5 is a schematic view of a partial structure of a battery according to a first embodiment of the present invention before a sealing structure is formed by press-sealing a case. The structure of the housing 11 before being press-sealed to form the sealing structure 111 will be described in detail as follows:
before the housing 11 is press-sealed to form the sealing structure 111, the cylindrical sidewall 116 of the housing 11 sequentially includes an opening 1161, a rolling groove 1162, and an accommodating portion 1163 along the axial direction, wherein one end of the accommodating portion 1163 is connected to the bottom plate 113, and the other end of the accommodating portion 1163 is connected to one end of the opening 1162 through the rolling groove 1162.
Before the housing 11 in this embodiment presses and seals one end of the opening 1161 to form the sealing structure 111, the thickness of the rolling groove 1162 is greater than or equal to that of the opening 1161, and the thickness of the rolling groove 1162 is greater than or equal to that of the accommodating portion 1163; wherein, the thickness of the roll groove part 1162 of the cylindrical side wall 116 is between 0.3mm and 1.5 mm. This semi-manufactured goods casing's structural strength is high, prevents that the battery from taking place unnecessary accidents such as casing fracture when the press seal forms sealing structure 111, has promoted the utility model discloses battery structure's stability.
The structure of the battery cap 13 in the first embodiment will be explained in detail with reference to fig. 1, 2 and 3:
the insulating plastic member 132 in this embodiment is disposed around the outer ring of the metal connecting member 131, and the insulating plastic member 132 is wrapped around the metal connecting member 131; the battery cap 13 of this structure improves the stability of the battery cap 13.
In the utility model, the explosion-proof groove 1311a is formed by punching from outside to inside through the metal connecting piece 131; the shape of the explosion-proof groove 1311a may be a ring-shaped, "U" -shaped or linear structure, and the shape of the explosion-proof groove 1311a in this embodiment is preferably a "U" -shaped structure. The length of the section of the opening of the explosion-proof groove 1311a is greater than or equal to the length of the section of the bottom end of the explosion-proof groove 1311 a; that is, the cross-sectional shape of the explosion-proof groove 1311a may be "V" shaped, "U" shaped, open-topped rectangular, or inverted trapezoidal. The sectional structure of the explosion-proof tank 1311a of this embodiment is an inverted trapezoidal structure.
In the metal connector 131 of this embodiment, the thickness of the connecting portion 1311 in the region where the explosion-proof groove 1311a is not provided is 0.2mm to 1mm, and the thickness of the connecting portion 1311 in the region where the explosion-proof groove 1311a is provided is 0.02mm to 0.2 mm.
In addition, the metal connector 131 in this embodiment is provided with a reinforcing rib 1312 on the outer side thereof for increasing the strength of the metal connector 131. The metal connecting member 131 and the insulating plastic member 132 in this embodiment may also be an integrally formed structure.
Referring to fig. 3, fig. 3 is an enlarged view of a structure of fig. 2. The structure of the insulating plastic member 132 in this embodiment will be described in detail:
the insulating plastic member 132 in this embodiment includes a first end portion 1321, a second end portion 1323, and an intermediate connecting portion 1322. The first end portion 1321 is disposed at one end of the insulating plastic member 132 and extends along one side of the metal connecting member 131, so as to isolate and insulate the outer side of the metal connecting member 131 from the inner wall of the battery case 11; in this embodiment, the first end 1321 of the insulating plastic member 132 isolates and insulates the metal connecting member 131 from the sealing structure 111 on the side away from the battery cell 12. A second end portion 1323 provided at the other end of the insulating plastic member 132 and extending along the other side of the metal connecting member 131 for isolating and insulating the outer side of the metal connecting member 131 from the inner wall of the battery case 11; the second end 1323 of the insulating plastic member 132 in this embodiment is used for isolating and insulating the inner side of the metal connecting member 131 from the rolling slot 112. An intermediate connection part 1322 is disposed at the middle of the insulating plastic part 132 for connecting the first end part 1321 and the second end part 1323; the middle connection part 1322 in this embodiment is disposed around the periphery of the metal connecting part 131, and is used for isolating and insulating the periphery of the metal connecting part 131 from the inner wall of the housing 11.
In this embodiment, the first end 1321 of the insulating plastic part 132 is provided with a locking rib on one side close to the metal connector 131, and the locking rib is used for sealing and fixing the metal connector 131. In the process of assembling the battery, the clamping reinforcing ribs press the metal connecting piece 131 through the sealing structure 111, so that the first end portion 1321 is hermetically fixed with the outer side of the metal connecting piece 131; screens strengthening rib has promoted insulating plastic part 132's compression degree, prevents effectively that insulating plastic part 132 from being broken by the pressure in stamping process.
In this embodiment, at least one sealing rib 13231 is disposed on one side of the second end 1323 of the insulating plastic member 132 close to the metal connecting member 131, and the sealing rib 13231 is used to tightly fix the second end 1323 and the inner side of the metal connecting member 131, so as to improve the sealing performance of the cap 13 and the overall stability of the battery structure.
With reference to fig. 5, fig. 15 and fig. 16, fig. 5 is a schematic partial structural view of a battery according to a first embodiment of the present invention before a sealing structure is formed by press-sealing a case; fig. 15 is a schematic structural view of an insulating plastic member before a case of the first embodiment of the battery of the present invention is stamped to form a sealing structure; fig. 16 is an enlarged view of the structure at D in fig. 15. The structure of the insulating plastic member 132a before the sealing structure 111 is formed by the housing 11 in this embodiment is described in detail:
before the housing 11 is stamped to form the sealing structure, the first end 1321 of the insulating plastic member 132 extends along the long side of the middle connecting portion 1322; at this time, the thickness of the first end portion 1321 is between 0.1mm and 1 mm; the thickness of the second end 1323 before deformation is between 0.1mm and 1 mm; in this embodiment, the thickness of the first end 1321 of the insulating plastic part 132 before deformation is less than or equal to the thickness of the second end 1322.
Before the shell 11 is stamped to form a sealing structure, the width of the clamping reinforcing rib 13211 is between 0.1mm and 0.5mm, and the thickness of the clamping reinforcing rib 13211 is between 0.05mm and 0.2 mm; the width of the sealing rib 13231 is between 0.1mm and 0.5 mm; the thickness of the sealing rib 13231 is between 0.03mm and 0.2 mm.
Before the battery structure is assembled, the size of the insulating plastic part 132 in the embodiment is limited, so that the injection molding and demolding in the production process of the insulating plastic part 132 are facilitated, and the production efficiency is improved; and be convenient for the equipment of battery block 13 for insulating plastic part 132 has good sealed fixed effect, has promoted the practicality of battery block.
With reference to fig. 2 and 4, fig. 2 is a schematic cross-sectional view of the overall structure of the first embodiment of the battery of the present invention, and fig. 4 is an exploded view of the overall structure of the first embodiment of the battery of the present invention. The structure of the battery cell 12 in this embodiment is explained in detail:
the case 11 in this embodiment is a steel case, and the case 11 includes a bottom plate 113 opposite to the battery cap 13; the battery cell 12 is sequentially stacked and wound by a positive pole piece, an insulating diaphragm and a negative pole piece to form a spiral columnar structure. A first insulating sheet 123 is arranged between the battery cell 12 and the bottom plate 113, one end of a negative electrode tab 122 is connected with a negative electrode of the battery cell 12, and the other end of the negative electrode tab 122 penetrates through the first insulating sheet 123 and extends along the inner side of the bottom plate 113; the negative electrode tab 122 in this embodiment is welded to the bottom plate 113 of the case 11 from the outside to the inside.
In this embodiment, a second insulating sheet 124 is disposed between the battery cell 12 and the battery cap 13, one end of the positive electrode tab 121 is connected to the positive electrode of the battery cell 12, and the other end of the positive electrode tab 121 penetrates through the first insulating sheet 123 and extends along the inner side of the connecting portion 1311; the second insulating sheet 124 in this embodiment is provided with a plurality of heat dissipation holes for dissipating heat from the battery cells 12.
The ratio of the height of the battery to the diameter of the battery in the embodiment is less than or equal to 1 so as to meet the requirements of part of button batteries on the market.
Compared with the traditional cap assembly with two metal pieces, the cap in the embodiment has only one metal piece inside, the cap 13 has a simple structure and an exquisite design, and the thickness of the cap can be effectively reduced; therefore, the problems that the structure of a cap assembly is complex and the assembly process is complex in the battery in the prior art are solved. In addition, in this embodiment, the connection portion 1311 of the metal connecting member 131 is provided with an explosion-proof groove 1311a from outside to inside, so that the explosion-proof effect of the cap assembly is improved, and the safety of the battery is high.
Referring to fig. 6 and 7, fig. 6 is a perspective view of a battery according to a second embodiment of the present invention, and fig. 7 is a schematic cross-sectional view of the overall structure of the battery according to the second embodiment of the present invention.
The present invention provides a battery cap and a battery using the same, wherein the battery includes a casing 21, a battery core 22 and a battery cap 23. The shell 21 is a hollow cylindrical structure with one open end and is used for mounting components; the battery cell 22 is disposed inside the casing 21 and configured to provide electric energy, the battery cell 22 in this embodiment is a spiral columnar structure, and the battery cell 22 includes a positive electrode tab 221 and a negative electrode tab 222; the battery cap 23 is used to seal the opening of the case 21 and lead out the electrode of the battery cell 22. The positive electrode tab 221 of the battery cell 22 is connected to the battery cap 23, and the negative electrode tab 222 of the battery cell 22 is connected to the casing 21.
The battery cap 23 includes a metal connector 231 and an insulating plastic member 232. The metal connecting piece 231 is arranged at one end of the opening of the shell 21 and used for leading out a positive electrode of the battery cell 22; the insulating plastic member 232 is used for insulating and protecting the metal connecting member 231 from the inner wall of the housing 21. The metal connecting member 231 in this embodiment includes a connecting portion 2311, and the connecting portion 2311 is located at the center of the metal connecting member 231 and is used for being connected with the positive electrode tab 221 of the battery cell 22. The connecting portion 2311 in this embodiment is provided with an explosion-proof groove 2311a from the outside to the inside.
Referring to fig. 7 and 8, fig. 7 is a schematic cross-sectional view of a second embodiment of the battery of the present invention; fig. 8 is an enlarged view of the structure at B of fig. 7. The structure of the housing 21 in the present embodiment will be explained in detail:
the ratio of the height to the diameter of the battery in this embodiment is 1 or less. The opening of one end of the casing 21 in this embodiment is provided with the sealing structure 211, and the sealing structure 211 is used for limiting the position of the battery cover cap 23, preventing the fixed battery cover cap 23 from falling off from the casing 21, and improving the structural stability of the battery.
The housing 21 in this embodiment is provided with a first bracket 212 for supporting the battery cap 23 inside, and the first bracket 212 includes a first extension portion 2121 and a first support portion 2122. The first extension part 2121 is disposed at one end of the inside of the casing 21 away from the opening, a long side of the first extension part 2121 is axially parallel to the casing 21, one side of the first extension part 2121 is connected to the inner wall of the casing 21, and the other side of the first extension part 2121 contacts and insulates the outer wall of the battery cell 22. In this embodiment, the first extension 2121 of the first bracket 212 is welded to the housing 21 by extrusion. The first support portion 2122 is connected to an end of the first extension portion 2121 near the opening of the housing 21, and the first support portion 2122 extends along the inside of the housing 21 for supporting the cap assembly. Preferably, the first bracket 212 in this embodiment is a first metal bracket.
The first bracket 212 in this embodiment can support the battery cap 23 through the first support part 2122, and further can limit and fix the battery cell 22 through the first extension part 2121 and the bent first support part 2122, so that the compactness and stability of the battery structure are greatly improved. The first bracket 212 is extrusion welded with the housing 21 through the first extension 2121, so as to improve the structural stability of the first bracket 212.
Referring to fig. 9 and 10, fig. 9 is an exploded schematic view of a cross section of an overall structure of a second embodiment of the battery of the present invention, and fig. 10 is an exploded schematic view of a cross section of an overall structure of a second embodiment of the battery of the present invention. The battery cap 23 in the present embodiment will be explained in detail:
insulating plastic part 232 in this embodiment encircles the outer lane that sets up at metal connecting piece 231, and insulating plastic part 232 parcel has promoted battery cap 23's stability greatly at metal connecting piece 231's periphery.
The utility model discloses in, explosion-proof groove 2311 a's shape can be annular, "U" shape or linear structure, and the preferred "U" shape structure of explosion-proof groove 2311a shape in this embodiment. The length of the cross section of the opening of the explosion-proof groove 2311a is greater than or equal to the length of the cross section of the bottom end of the explosion-proof groove 2311 a; the utility model discloses in, explosion-proof groove 2311 a's cross sectional shape can be for "V" shape, "U" shape, open-top's rectangle, perhaps fall the trapezium structure. The explosion-proof groove 2311a of the present embodiment preferably has an inverted trapezoidal structure in the axial cross section of the battery.
In this embodiment, the explosion-proof groove 2311a is punched from the outside to the inside by the metal connecting member 231. In the metal connector 231 of this embodiment, the thickness of the connecting portion 2311 in the region where the explosion-proof groove 2311a is not provided is between 0.2mm and 1mm, and the thickness of the connecting portion 2311 in the region where the explosion-proof groove 1311a is provided is between 0.02mm and 0.2 mm.
In addition, the metal connector 231 of this embodiment is provided with a rib 2312 on the outer side thereof for increasing the strength of the metal connector 231. The metal connecting member 231 and the insulating plastic member 232 in this embodiment may also be an integrally formed structure.
Referring to fig. 8, fig. 8 is an enlarged view of a structure at B of fig. 7. The structure of the insulating plastic member 232 in this embodiment will be described in detail:
the insulating plastic member 232 in this embodiment includes a first end 2321, a second end 2323 and an intermediate connecting portion 2322. The first end 2321 is disposed at one end of the insulating plastic part 232, and isolates and insulates one side of the metal connecting part 231, which is far away from the battery cell 22, from the sealing structure 211; the second end 2323 is disposed at the other end of the insulating plastic part 232, and isolates and insulates the other side of the metal connecting part 231 from the first supporting part 2122; the intermediate connection portion 2322 is disposed in the middle of the insulating plastic member 232 for connecting the first end portion 2321 and the second end portion 2323, and the intermediate connection portion 2322 is disposed around the metal connecting member 231 for isolating and insulating the periphery of the metal connecting member 231 from the inner wall of the housing 21.
In this embodiment, a clamping reinforcing rib is disposed on one side of the first end 2321 of the insulating plastic part 232 close to the metal connector 231, and the clamping reinforcing rib is used for sealing and fixing the metal connector 231. Screens strengthening rib has promoted insulating plastic member 232's compression degree, and the screens strengthening rib not only effectively prevents insulating plastic member 232 and presses absolutely in stamping process.
In this embodiment, at least one sealing rib 23231 is disposed on one side of the second end 2323 of the insulating plastic member 232 close to the metal connecting member 231, and the sealing rib 23231 is used for connecting the second end 2323 with the inside of the metal connecting member 231 in a sealing manner, so as to improve the sealing performance and stability of the battery sealing structure.
With reference to fig. 9 and fig. 10, the structure of the battery cell 22 in this embodiment is described in detail:
the case 21 in the present embodiment is a steel case, and the case 21 includes a bottom plate 113 opposite to the battery cap 23; the battery cell 22 is sequentially stacked and wound by a positive pole piece, an insulating diaphragm and a negative pole piece to form a spiral columnar structure. A spiral columnar structure. A first insulating sheet 223 is arranged between the battery cell 22 and the bottom plate 113, one end of the negative electrode tab 222 is connected with the negative electrode of the battery cell 22, and the other end of the negative electrode tab 222 penetrates through the first insulating sheet 223 and extends along the bottom plate 113. The first insulating sheet 223 in this embodiment is welded to the case 21 from the outside to the inside.
In this embodiment, a second insulating sheet 224 is disposed between the battery cell 22 and the cap, one end of the positive electrode tab 221 is connected to the positive electrode of the battery cell 22, and the other end of the positive electrode tab 221 penetrates through the first insulating sheet 223 and extends along the connecting portion 2311; the second insulating sheet 224 in this embodiment is provided with a plurality of heat dissipation holes for dissipating heat from the battery cell 22.
Second embodiment on the basis of the first embodiment, the first bracket 212 for supporting the cap 23 is built in the housing 21, the first extending portion 2121 side of the first bracket 212 is connected to the inner wall of the housing 21, and the first supporting portion 2122 of the first bracket 212 supports the cap 23. The shell in the embodiment has a simple structure, so that the assembly process of the battery is simplified, the comprehensive production efficiency is improved, and the cost is reduced; and the structure of the shell 21 is optimized, and the space for placing the battery cell inside the shell 21 is increased.
Referring to fig. 11, 12, 13 and 14, wherein fig. 11 is a perspective view of a battery according to a third embodiment of the present invention, fig. 12 is a schematic cross-sectional view of the overall structure of the battery according to the third embodiment of the present invention, fig. 13 is an enlarged schematic cross-sectional view of the structure at C of fig. 11, and fig. 14 is an exploded schematic cross-sectional view of the overall structure of the battery according to the third embodiment of the present invention. As follows, the utility model provides a pair of can solve above technical problem's battery:
referring to fig. 11 and 12, the battery of the present embodiment includes a case 31, a battery cell 32, and a battery cap 33. The housing 31 is a hollow cylindrical structure with one end open, and is used for mounting components; the battery cell 32 is disposed inside the casing 31 and used for providing electric energy; the battery cell 32 in this embodiment is a spiral columnar structure, and the battery cell 32 includes a positive electrode tab 321 and a negative electrode tab 322. The battery cap 33 is used to seal the opening of the case 31 and lead out the positive electrode of the battery cell 32. The positive electrode tab 321 of the battery cell 32 is connected to the battery cap 33, and the negative electrode tab 322 of the battery cell 32 is connected to the casing 31.
The battery cap 33 includes a metal connector 331 and an insulating plastic member 332. The metal connecting piece 331 is disposed at one end of the opening of the casing 31, and the metal connecting piece 331 is connected to the positive electrode tab 322 of the battery cell 32; the insulating plastic part 332 is used for insulating and protecting the metal connecting part 331 and the inner wall of the casing 31, wherein the metal connecting part 331 includes a connecting part 3311, the connecting part 3311 is located at the center of the metal connecting part 331, and the connecting part 3311 is connected to the positive electrode tab 321 of the battery core 32. In addition, the connecting portion 3311 of the present embodiment is provided with an explosion-proof slot 3311a from the outside to the inside.
The structure of the housing 31 in the present embodiment will be explained in detail with reference to fig. 12 and 13:
the ratio of the height to the diameter of the shell in the embodiment is less than or equal to 1 so as to meet the requirements of part of button batteries on the market. An opening at one end of the casing 31 in this embodiment is provided with a sealing structure 311, and the sealing structure 311 is used for limiting the position of the battery cap 33, preventing the battery cap 33 from falling off from the casing 31, and improving the structural stability of the battery.
The case 31 in this embodiment is provided inside with a second support 312 for supporting the battery cap 33, and the second support 312 includes a second extending portion 3121 and a second support portion 3122. The second extending portion 3121 is disposed at one end of the inside of the housing 31 near the opening, the long side of the second extending portion 3121 is axially parallel to the housing 31, one side of the second extending portion 3121 is connected to the housing 31, and the other side of the second extending portion 3121 is in contact with and insulated from the outer ring of the insulating plastic part 332. In this embodiment, the second extension 3121 of the second bracket 312 is welded to the inner wall of the housing 31, so that the second bracket 312 is tightly coupled to the housing 31. The second support portion 3122 is connected to an end of the second extending portion 3121 away from the opening of the housing 31, and the second support portion 3122 extends along the inside of the housing 31 for supporting the cap assembly.
The second bracket 312 in this embodiment is preferably a second metal bracket.
Referring to fig. 11 and 14, the battery cap 33 in the present embodiment will be described in detail:
the insulating plastic part 332 in this embodiment surrounds the outer ring of the metal connecting part 331, and the insulating plastic part 332 wraps around the metal connecting part 331, so that the stability of the battery cap 33 is improved.
In the present invention, the shape of the anti-explosion groove 3311a may be an annular, U-shaped or linear structure, and the shape of the anti-explosion groove 3311a in this embodiment is preferably a U-shaped structure. The length of the cross section of the opening of the explosion-proof slot 3311a is greater than or equal to the length of the cross section of the bottom end of the explosion-proof slot; and the cross-sectional shape of the explosion-proof slot 3311a in the present invention may be "V" -shaped, "U" -shaped, rectangular with an open top, or inverted trapezoidal. The sectional shape of the explosion-proof groove 3311a of this embodiment is preferably an inverted trapezoidal structure.
In this embodiment, in the metal connecting member 331 of this embodiment, the thickness of the connecting portion 3311 in the region where the explosion-proof groove 3311a is not provided is between 0.2mm and 1mm, and the thickness of the connecting portion 2311 in the region where the explosion-proof groove 3311a is provided is between 0.02mm and 0.2 mm.
In addition, a reinforcing rib 3312 is provided on the outer side of the metal connecting member 331 in this embodiment, for increasing the strength of the metal connecting member 331. The metal connecting member 331 and the insulating plastic member 332 in this embodiment may also be integrally formed.
Further, the structure of the insulating plastic part 332 is described in detail with reference to fig. 13:
the insulating plastic part 332 in this embodiment includes a first end portion 3321, a second end portion 3323, and an intermediate connecting portion 3322. The first end portion 3321 is disposed at one end of the insulating plastic part 332, and isolates and insulates one side of the metal connecting part 331 away from the battery cell 32 from the sealing structure 311; the second end portion 3323 is disposed at the other end of the insulating plastic part 332 to isolate and insulate the other side of the metal connecting part 331 from the second supporting portion 3122; the intermediate connecting portion 3322 is disposed in the middle of the insulating plastic member 332 for isolating the periphery of the metal connecting member 331 from the inner wall of the housing 31.
In this embodiment, a clamping rib is disposed on a side of the first end portion 3321 of the insulating plastic part 332 close to the metal connecting part 331, and the clamping rib effectively prevents the insulating plastic part 332 from being broken during the stamping process.
With reference to fig. 14, the structure of the battery cell 32 in this embodiment is described in detail:
the case 31 in this embodiment is a steel case, and the case 31 includes a bottom plate 313 opposite to the battery cap; the battery cell 32 is sequentially stacked and wound by a positive pole piece, an insulating diaphragm and a negative pole piece to form a spiral columnar structure. A first insulating sheet 323 is arranged between the battery cell 32 and the bottom plate 313, one end of a negative electrode tab 322 is connected with a negative electrode of the battery cell 32, and the other end of the negative electrode tab 322 penetrates through the first insulating sheet 323 and extends along the inner side of the bottom plate 313. The negative electrode tab 322 in this embodiment is welded to the case 31 from the outside to the inside.
In this embodiment, a second insulating sheet 324 is disposed between the battery cell 32 and the cap 33, and a plurality of heat dissipation holes for dissipating heat from the battery cell 32 are disposed on the second insulating sheet 324 in this embodiment.
The third embodiment is different from the second embodiment in that the case 31 houses the second support 312 for supporting the cap 33, the second support 312 supports the cap 33 through the second support portion 3122, and the second extension portion 3121 side is connected to the case 31; the other side of the second extending portion 3121 contacts and is insulated from the outer ring of the insulating plastic part 332; compared with the second embodiment, the second bracket 312 structure of this embodiment does not occupy the space of the battery core built in the case, and the case 31 can accommodate a larger winding core, thereby greatly increasing the battery capacity.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that the scope of the present invention shall be determined by the scope of the appended claims.
Claims (10)
1. A battery cap for sealing an opening of a battery case and leading out an electrode of a battery cell, the battery cap comprising:
the metal connecting piece is arranged at one end of the opening of the battery shell and used for sealing the opening of the battery shell and leading out an electrode of the battery core; and the number of the first and second groups,
the insulating plastic part is used for insulating and protecting the metal connecting part and the inner wall of the battery shell;
the metal connecting piece comprises a connecting part, and the connecting part is positioned at the center of the metal connecting piece and is used for being connected with a positive electrode lug of a battery cell;
the connecting part is provided with an explosion-proof groove from outside to inside.
2. The battery cap according to claim 1, wherein the insulating plastic member is disposed around the outer ring of the metal connecting member, and the insulating plastic member is wrapped around the metal connecting member.
3. The battery cap according to claim 1, wherein the cross-sectional shape of the explosion-proof groove is a ring-shaped, "U" -shaped or linear structure,
the length of the cross section of the opening of the explosion-proof groove is greater than or equal to the length of the cross section of the bottom end of the explosion-proof groove.
4. A battery cap as claimed in claim 3, wherein the thickness of the connecting portion of the metal connector where the explosion-proof groove region is not provided is between 0.2mm and 1mm, and the thickness of the connecting portion where the explosion-proof groove region is provided is between 0.02mm and 0.2 mm.
5. The battery cap as claimed in claim 1, wherein the metal connector is provided with a reinforcing rib at an outer side thereof for increasing the strength of the metal connector.
6. The battery cap according to claim 1, wherein the insulating plastic member comprises:
the first end part is arranged at one end of the insulating plastic part, extends along one side of the metal connecting part and is used for isolating and insulating the outer side of the metal connecting part from the inner wall of the battery shell;
a second end part arranged at the other end of the insulating plastic part and extending along the other side surface of the metal connecting part for isolating and insulating the inner side of the metal connecting part from the inner wall of the battery shell, and
the middle connecting part is arranged in the middle of the insulating plastic part and used for connecting the first end part with the second end part, and the middle connecting part is arranged around the metal connecting part and used for isolating and insulating the periphery of the metal connecting part from the inner wall of the battery shell.
7. The battery cap of claim 6, wherein a retaining rib is disposed on a side of the first end portion adjacent to the metal connecting member, the retaining rib contacts with an outer side of the metal connecting member, and the retaining rib is configured to press the metal connecting member to sealingly fix the first end portion to the metal connecting member.
8. The battery cap of claim 6, wherein the second end portion is provided with at least one sealing rib on a side thereof adjacent to the metal connector, and the sealing rib is connected with the inner side of the metal connector; the sealing rib is used for sealing and fixing the first end part and the inner side of the metal connecting piece.
9. A battery, comprising
The shell is used for mounting components and is of a hollow cylindrical structure with one open end;
the battery cell is arranged in the shell and used for providing electric energy, and the battery cell comprises a positive electrode lug and a negative electrode lug; and the number of the first and second groups,
the battery cap of any one of claims 1-8 for sealing the opening of the case;
the battery cell is of a spiral columnar structure, a positive electrode tab of the battery cell is connected with the battery cap, and a negative electrode tab of the battery cell is connected with the shell.
10. The battery of claim 9, wherein the ratio of the height of the battery to the diameter of the battery is less than or equal to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020785443.7U CN212342702U (en) | 2020-05-12 | 2020-05-12 | Battery cap and battery using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020785443.7U CN212342702U (en) | 2020-05-12 | 2020-05-12 | Battery cap and battery using same |
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| Publication Number | Publication Date |
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| CN212342702U true CN212342702U (en) | 2021-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020785443.7U Active CN212342702U (en) | 2020-05-12 | 2020-05-12 | Battery cap and battery using same |
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| CN (1) | CN212342702U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113013527A (en) * | 2021-02-25 | 2021-06-22 | 东莞小锂新能源科技有限公司 | Novel button battery and manufacturing and mounting method of shell sealing element structure |
| CN113258179A (en) * | 2021-04-22 | 2021-08-13 | 路华置富电子(深圳)有限公司 | Novel packaged solid-state battery |
| WO2023050278A1 (en) * | 2021-09-30 | 2023-04-06 | 宁德时代新能源科技股份有限公司 | Battery cell and method and system for manufacturing same, and battery and electric device |
| WO2024000947A1 (en) * | 2022-06-28 | 2024-01-04 | 湖北亿纬动力有限公司 | Cap assembly, battery, battery module, battery pack, and vehicle |
-
2020
- 2020-05-12 CN CN202020785443.7U patent/CN212342702U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113013527A (en) * | 2021-02-25 | 2021-06-22 | 东莞小锂新能源科技有限公司 | Novel button battery and manufacturing and mounting method of shell sealing element structure |
| CN113013527B (en) * | 2021-02-25 | 2022-10-14 | 东莞小锂新能源科技有限公司 | Novel button battery and manufacturing and mounting method of shell sealing element structure |
| CN113258179A (en) * | 2021-04-22 | 2021-08-13 | 路华置富电子(深圳)有限公司 | Novel packaged solid-state battery |
| CN113258179B (en) * | 2021-04-22 | 2023-01-24 | 路华置富电子(深圳)有限公司 | Novel packaged solid-state battery |
| WO2023050278A1 (en) * | 2021-09-30 | 2023-04-06 | 宁德时代新能源科技股份有限公司 | Battery cell and method and system for manufacturing same, and battery and electric device |
| WO2024000947A1 (en) * | 2022-06-28 | 2024-01-04 | 湖北亿纬动力有限公司 | Cap assembly, battery, battery module, battery pack, and vehicle |
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