CN212323097U

CN212323097U - Battery structure with cap upper bracket

Info

Publication number: CN212323097U
Application number: CN202020785854.6U
Authority: CN
Inventors: 刘承香; 温松江
Original assignee: Luhua Zhifu Electronics Shenzhen Co ltd
Current assignee: Luhua Zhifu Electronics Shenzhen Co ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-01-08
Anticipated expiration: 2030-05-12

Abstract

The utility model provides a battery structure with a cap upper bracket, which comprises a shell, an electric core and a cap; wherein, a sealing structure is arranged at an opening at one end of the shell and used for limiting the position of the outer side of the cap; the inside of the shell is provided with a bracket for supporting the cap, and the bracket provided by the embodiment comprises an extending part and a supporting part. The battery structure with the upper bracket of the cap of the utility model is characterized in that the bracket for supporting the cap is arranged in the shell, one side of the extending part of the bracket is connected with the inner wall of the shell, and the other side of the extending part is contacted and insulated with the outer ring of the cap; the support part of the bracket is used for supporting the battery cap; the structure not only simplifies the assembly process of the battery, improves the comprehensive production efficiency and reduces the cost; and the structure of the shell is optimized, the available space in the shell is improved, and the shell can accommodate a battery cell with larger capacity.

Description

Battery structure with cap upper bracket

Technical Field

The utility model relates to a battery field, in particular to battery structure with block upper bracket.

Background

A battery is a device that can convert chemical energy into electrical energy, and has a positive electrode and a negative electrode. With the progress of science and technology, people's life is more and more intelligent and convenient, and the appearance of various domestic appliances has reduced people's the amount of labour, and the battery is one of the indispensable configuration of electrical equipment continuation of the journey.

In the manufacturing process of the existing battery, the battery cell and the cap are separated through the rolling groove process, the steps are complex, the production efficiency is low, the overall structure of the battery processed through the rolling groove process occupies a large volume, but the space for fixing the battery cell inside the battery shell is small, the structural design of the battery is unreasonable, the internal space of the shell cannot be fully utilized, the battery roll core with small capacity can only be placed, and the overall practicability of the battery structure is low.

Therefore, it is desirable to provide a battery structure with a cap upper bracket to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery structure with a cap upper bracket, which is characterized in that a bracket for supporting a cap is arranged in a shell, one side of an extension part of the bracket is connected with the inner wall of the shell, and the other side of the extension part is contacted and insulated with the outer wall of the cap; the supporting part of support is used for supporting the battery block to with electric core and block spaced apart, solved among the prior art structural design of battery structure reasonable inadequately, the little technical problem of battery inner space capacity.

In order to solve the technical problem, the utility model adopts the technical scheme that: a battery structure having a cap upper cradle, comprising:

the shell is used for mounting components and is of a hollow cylindrical structure with one open end;

the cover cap is arranged at an opening at one end of the shell and used for sealing the opening of the shell; and

the battery cell is arranged in the shell and used for providing electric energy;

wherein, the casing is inside to be equipped with and to be used for supporting the support of battery block, the support includes:

an extension portion disposed at one end of the inside of the housing near the opening, the long side of the extension portion being axially parallel to the housing, and one side of the extension portion being connected to the housing, an

The supporting part is connected with one end, away from the opening of the shell, of the extending part, extends towards the inside of the shell and is used for supporting the battery cover cap.

The utility model discloses in, the support is the tubular structure, and with the block cup joints, the block lateral wall with the support inner wall is insulating. The battery is of a cylindrical structure through the support, and the outer ring of the cap assembly is sleeved, so that the stability of the battery structure is improved, the use space inside the shell is improved, and the capacity of the battery structure is greatly improved.

In the utility model, the included angle between the supporting part and the extending part is between 85 degrees and 95 degrees.

In the utility model, the support also comprises a reinforcing part for reinforcing the rigidity of the support, the reinforcing part is positioned at the bending part of the support, one end of the reinforcing part is connected with one end of the supporting part, the other end of the reinforcing part is connected with the extending part,

the thickness of the reinforcing part is greater than that of the supporting part, and the thickness of the reinforcing part is greater than that of the extending part. The rigidity of the support is enhanced through the reinforcing part of the support, the structural stability of the support after the bending production process is improved, and the yield of the support structure processing production is improved.

In the utility model, the battery cell comprises a positive electrode tab and a negative electrode tab, the positive electrode tab of the battery cell is connected with the cap, and the negative electrode tab of the battery cell is connected with the shell;

the shell comprises a bottom plate opposite to the cap, a first insulating sheet is arranged between the battery cell and the bottom plate,

one end of the negative pole lug is connected with the negative pole piece of the battery core, the other end of the negative pole lug penetrates through the first insulating piece and extends along the bottom plate,

and the negative pole lug is welded with the bottom plate of the shell from outside to inside. The negative pole tab and the bottom plate of the shell are welded in an extrusion mode from outside to inside, so that the structure not only reduces the poor manufacturing of the tab and the pole piece caused by the tab welded outside the battery cell; and the internal resistance of the battery core is reduced, and the storage performance of the battery is improved.

The utility model discloses in, the block includes:

the metal connecting piece is arranged at one end of the opening of the shell and used for connecting a positive electrode lug of the battery cell; and the number of the first and second groups,

the insulating plastic part is arranged around the periphery of the metal connecting part and used for insulating and protecting the metal connecting part and the inner wall of the shell;

the battery cell comprises a metal connecting piece and is characterized in that a connecting portion is arranged at the center of the metal connecting piece, and one end of a positive electrode lug of the battery cell is connected with the connecting portion. The structure of the cap is simplified, the thickness of the finished product is reduced, and a larger battery cell can be accommodated, so that the capacity of the battery is greatly increased.

The utility model discloses in, insulating plastic part parcel is in metal connecting piece is peripheral, insulating plastic part includes

The first end part is arranged at one end of the insulating plastic part, is positioned at one side of the metal connecting part and is used for isolating and insulating the outer side of the metal connecting part from the sealing structure;

a second end portion provided at the other end of the insulating plastic part and located at the other side of the metal connecting part, for isolating and insulating the inside of the metal connecting part from the supporting portion,

the middle connecting part is arranged in the middle of the insulating plastic part, the first end part is connected with the second end part through the middle connecting 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 and the inner wall of the shell. The insulating plastic part comprehensively insulates the shell and the metal connecting piece, and the use safety of the battery is improved.

The utility model discloses in, the second tip is close to one side of metal connecting piece is equipped with at least one sealed muscle, sealed muscle with the metal connecting piece is inboard to be connected for with the first tip with the metal connecting piece is inboard sealed fixed.

The utility model discloses in, metal connecting piece's connecting portion are kept away from the outside surface of electricity core is equipped with explosion-proof structure, has promoted the security that battery structure used.

The utility model discloses in, the height of battery with the proportion of the diameter of battery is less than or equal to 1 to satisfy the demand of the part button cell on the market.

The utility model discloses compare in the battery structure of traditional slot rolling processing technology production, its beneficial effect is:

the utility model discloses a battery structure with block upper bracket through at the built-in support that is used for supporting the block of casing, has simplified the equipment technology of battery, improves production comprehensive efficiency, reduces the cost. The bracket is connected with the inner wall of the shell through one side of the extension part and supports the battery cap through the support part; the overall structure of the battery is optimized, the space for placing the battery core in the shell is increased, the battery core with large capacity can be accommodated in the shell, and the capacity of the battery is increased; the battery structure aims to solve the technical problems that the structural design of the battery structure in the prior art is not reasonable enough and the internal space capacity of the battery is small.

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 first embodiment of a battery structure with a cap upper bracket according to the present invention.

Fig. 2 is a schematic cross-sectional view of the overall structure of the first embodiment of the battery structure with the cap upper bracket according to the present invention.

Fig. 3 is an enlarged view of a structure of fig. 2.

Fig. 4 is an exploded cross-sectional view of the first embodiment of the battery structure with the cap upper bracket according to the present invention.

Fig. 5 is a perspective view of a second embodiment of the battery structure with the cap upper bracket according to the present invention.

Fig. 6 is a schematic cross-sectional view of the overall structure of a second embodiment of the battery structure with the cap upper bracket according to the present invention.

Fig. 7 is an enlarged view of the structure at B of fig. 6.

Fig. 8 is a cap diagram of a battery structure with a cap upper bracket according to a second embodiment of the present invention.

Fig. 9 is an exploded schematic view of the overall structure section of the second embodiment of the battery structure with the cap upper bracket according to the present invention.

Fig. 10 is a perspective view of a third embodiment of a battery structure with a cap upper bracket according to the present invention.

Fig. 11 is a bottom view of a third embodiment of a battery structure with a cap upper bracket according to the present invention.

Fig. 12 is a schematic cross-sectional view of the overall structure of a third embodiment of the battery structure with the cap upper bracket according to the present invention.

Fig. 13 is an enlarged view of the structure at C of fig. 12.

Fig. 14 is an enlarged view of a portion of the structure of fig. 12.

Fig. 15 is an exploded schematic view of the overall structure of the third embodiment of the battery structure with the cap upper bracket according to the present invention.

Fig. 16 is a schematic structural diagram of the battery structure with the cap upper bracket according to the first embodiment of the present invention before the case is stamped to form the sealing structure.

Fig. 17 is a schematic structural view of the insulating plastic member before the sealing structure is formed by stamping the housing of the first embodiment of the battery structure with the cap upper bracket according to the present invention.

Fig. 18 is an enlarged view of the structure at D in fig. 17.

Reference numbers for the first embodiment: the battery comprises a shell 11, a sealing structure 111, a bracket 112, an extension portion 1121, a support portion 1122, a reinforcing portion 1123, a bottom plate 113, 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 cap 13, a metal connector 131, a connecting portion 1311, an explosion-proof groove 1311a, an insulating plastic member 132, a first end portion 1321, a clamping reinforcing rib 13211, an intermediate connecting portion 1322, a second end portion 1323 and a sealing rib 13231.

Reference numerals of the second embodiment: the battery comprises a shell 21, a sealing structure 211, a bracket 212, an extending part 2121, a supporting part 2122, a reinforcing part 2123, a bottom plate 213, a battery cell 22, a positive electrode tab 221, a negative electrode tab 222, a first insulating sheet 223, a second insulating sheet 224, a cap 23, a metal connecting piece 231, a connecting part 2311, a first groove 2311a, a first air leakage channel 2311b, a safety valve metal cover 2312, a heat-sensitive hot melt adhesive 2313, an insulating plastic piece 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 bracket 312, an extending portion 3121, a supporting portion 3122, a reinforcing portion 3123, a bottom plate 313, a second groove 3131, a second air release passage 3132, a safety valve cover plate 314, a thermosensitive hot melt adhesive 315, a battery core 32, a positive electrode tab 321, a negative electrode tab 322, a first insulating sheet 323, a second insulating sheet 324, a cap 33, a metal connecting member 331, a connecting portion 3311, an insulating plastic member 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 first embodiment of a battery structure with a cap upper bracket according to the present invention, fig. 2 is a schematic cross-sectional view of an overall structure of the first embodiment of the battery structure with the cap upper bracket according to the present invention, and fig. 3 is an enlarged schematic view of a structure at a position a of fig. 2.

The present invention provides a first embodiment of a battery structure with a cap upper bracket, which can solve the above technical problems, and the battery structure includes a casing 11, a battery cell 12 and a cap 13; the shell 11 is used for mounting components, and the shell 11 is a hollow cylindrical structure with one open end; the battery cell 12 is disposed in the housing 11 for supplying electric energy. The cap 13 is disposed at an opening at one end of the casing 11, and is used for sealing the opening of the casing 11 and leading out the positive electrode of the battery cell 12.

Wherein, a sealing structure 111 is arranged at an opening at one end of the shell 11, and the sealing structure 111 is used for limiting the position of the outer side of the cap 13; the housing 11 is provided inside with a bracket 112 for supporting the cap 13. The bracket 112 provided in this embodiment includes an extending portion 1121 and a supporting portion 1122; the extension portion 1121 is disposed at one end of the bracket 112 away from the opening of the housing 11, a long side of the extension portion 1121 is axially parallel to the housing 11, one side of the extension portion 1121 is connected to the inner wall of the housing 11, and the other side of the extension portion 1121 is in contact with and insulated from the cap 13; the supporting portion 1122 is located at one end of the bracket 112 away from the opening of the housing 11, one end of the supporting portion 1122 is connected to one end of the extending portion 1121 close to the opening of the housing 11, and the other end of the supporting portion 1122 extends along the inside of the housing 11 for supporting the cap 13 of the battery.

Referring 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 an overall structure cross section of a first embodiment of a battery structure with a cap upper bracket according to the present invention. The structure of the housing 11 in the present embodiment will be explained in detail:

the housing 11 in this embodiment is a steel housing, and the ratio of the height of the battery to the diameter of the battery is less than or equal to 1, so as to meet the requirements of some button batteries in the market.

In this embodiment, the bracket 112 is a cylindrical structure and is sleeved with the cap 13, the peripheral sidewall of the cap 13 is insulated from the inner wall of the bracket 112, the bracket 112 with this structure facilitates the assembly of the battery product, and occupies a small space inside the housing 11.

In this embodiment, an included angle between the supporting portion 1122 and the extending portion 1121 ranges from 85 ° to 95 °. Preferably, in the present embodiment, an included angle between the supporting portion 1122 of the bracket 112 and the extending portion 1121 is a right angle, so as to support the cap 13 conveniently.

In this embodiment, the bracket 112 further includes a reinforcing portion 1123 for reinforcing the rigidity of the bracket 112, the reinforcing portion 1123 is located at the bending portion of the bracket 112, one end of the reinforcing portion 1123 is connected to one end of the supporting portion 1122, and the other end of the reinforcing portion 1123 is connected to the extending portion 1121. In the bracket 112 of the present embodiment, the thickness of the reinforcing portion 1123 is greater than the thickness of the supporting portion 1122, and the thickness of the reinforcing portion 1123 is greater than the thickness of the extending portion 1121.

With reference to fig. 4, fig. 4 is an overall structure cross-sectional exploded view of a first embodiment of the battery structure with a cap upper bracket according to the present invention, which explains the structure of the battery cell 12 in this embodiment:

in this embodiment, the battery cell 12 includes a positive electrode tab 121 and a negative electrode tab 122, 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 shell 11 is a steel shell, and the shell 11 comprises a bottom plate 113 and a cover 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 sheet 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 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 cap 13, one end of the positive electrode tab 121 is connected to the positive electrode tab 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.

With reference to fig. 2, fig. 3 and fig. 4, fig. 2 is a schematic cross-sectional view of the overall structure of the first embodiment of the battery structure with the cap upper bracket according to the present invention, fig. 3 is an enlarged schematic structural view of a point a in fig. 2, and fig. 4 is an exploded cross-sectional view of the overall structure of the first embodiment of the battery structure with the cap upper bracket according to the present invention. The cap 13 in the present embodiment is explained:

in this embodiment, the cap 13 includes a metal connecting member 131 and an insulating plastic member 132, the metal connecting member 131 is disposed at the opening of the casing 11, and is connected to the positive electrode tab 121 of the electric core 12, and is used for leading out the positive electrode of the electric core 12; the insulating plastic member 132 is disposed around the metal connecting member 131 for insulating and protecting the metal connecting member 131 from the inner wall of the housing 11; the metal connector 131 includes a connecting portion 1311, the connecting portion 1311 is located at the center of the metal connector 131, and one end of the positive electrode tab 121 of the battery cell 12 is connected to the connecting portion 1311.

Referring to fig. 3, the insulating plastic member 132 of the present 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 housing 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. The second end 1323 is disposed at the other end of the insulating plastic member 132 and extends along the other side of the metal connecting member 131 to isolate and insulate the inner side of the metal connecting member 131 from the inner wall of the housing 11, in this embodiment, the second end 1323 of the insulating plastic member 132 isolates and insulates the inner side of the metal connecting member 131 from the supporting portion 1122. The middle 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, and the middle connection part 1322 is disposed around the metal connection part 131 for isolating and insulating the periphery of the metal connection part 131 from the inner wall of the housing 11.

In this embodiment, a clamping rib is disposed on one side of the first end portion 1321 of the insulating plastic member 132 close to the metal connecting member 131, and the clamping rib is used to enhance the strength of the insulating plastic member 132. The clamping reinforcing ribs in the embodiment contact with the outer side of the metal connecting piece 131, and in the process of assembling the battery, the clamping reinforcing ribs extrude the metal connecting piece 131 through the sealing structure 111; 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 a side of the second end 1323 of the insulating plastic member 132 close to the metal connecting member 131, and the sealing rib 13231 seals and connects the second end 1323 with the inner side of the metal connecting member 131, so as to improve the sealing performance and stability of the cap 13.

With reference to fig. 16, 17 and 18, fig. 6 is a partial schematic structural view of a first embodiment of a battery structure with a cap upper bracket according to the present invention before a case is press-sealed to form a sealing structure; fig. 17 is a schematic structural view of an insulating plastic member before a case of the first embodiment of the battery structure with the cap upper support is stamped to form a sealing structure according to the present invention; fig. 18 is an enlarged view of the structure at D in fig. 17. The structure of the insulating plastic member 132 before the sealing structure 111 is formed by the housing 11 in this embodiment is explained:

before the housing 11 is stamped to form the seal, the first end 1321 of the insulating plastic member 132 extends along the long side of the middle connecting portion 1322; the thickness of the first end portion 1321 is between 0.1mm and 1 mm; the thickness of the second end 1323 is between 0.1mm and 1 mm; in this embodiment, the thickness of the first end portion 1321 of the insulating plastic part 132 before deformation is smaller than or equal to the thickness of the second end portion 1322.

Before the shell 11 is not 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 0.5mm, and the thickness of the sealing rib 13231 is between 0.03mm and 0.2 mm.

The size of the insulating plastic part 132 in this embodiment is limited, which is convenient for injection molding and demolding in the production process of the insulating plastic part 132; and the insulating plastic part of this structure makes the battery structure of assembly have good leakproofness and stability moreover.

With reference to fig. 2 and 4, the structure of the metal connecting member 131 in the present embodiment is explained:

the metal connector 131 in this embodiment includes a connecting portion 1311 for connecting with the positive electrode tab 121 of the battery cell 12; the outer side surface of the metal connecting piece 131 far away from the battery cell 12 is provided with an explosion-proof structure. The explosion-proof structure in this embodiment includes an explosion-proof groove 1311a, and the explosion-proof groove 1311a is punched from outside to inside through a metal connecting member 131.

In the present invention, the shape of the anti-explosion groove 1311a may be a ring shape, a "U" shape or a linear structure, and the shape of the anti-explosion groove 1311a in this embodiment is preferably a "U" shape 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; the utility model discloses in, explosion-proof groove 1311 a's cross sectional shape can be for "V" shape, "U" shape, open-top's rectangle, or fall trapezium structure. The sectional structure of the explosion-proof tank 1311a of this embodiment is preferably 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 outer side of the metal connector 131 in this embodiment is provided with a reinforcing rib for increasing the strength of the metal connector 131.

The battery structure having the cap upper holder in the present embodiment not only simplifies the assembly process of the battery structure but also optimizes the structure of the case 11 by incorporating the holder 112 for supporting the cap 13 in the case 11. The battery structure in this embodiment makes full use of the inner space of the casing 11, and the casing 11 can accommodate a larger-capacity battery core, thereby increasing the overall capacity of the battery structure and improving the practicability of the battery structure. The battery structure aims to solve the problems that the structural design of the battery structure in the prior art is not reasonable enough and the internal space capacity of the battery is small.

In addition, the battery structure in the present embodiment is configured by disposing a holder for supporting the cap inside the case; therefore, the problems of battery leakage caused by the traditional battery rolling groove process and battery short circuit caused by the fact that the inner wall of the rolling groove extrudes the winding core are solved, and the yield of battery production is improved; moreover, the steel shell in the embodiment can be made of thin plates with the thickness less than or equal to 0.15mm, and the applicability is strong.

Referring to fig. 5, fig. 6, fig. 7 and fig. 9, fig. 5 is a perspective view of a second embodiment of a battery structure with a cap upper bracket according to the present invention, fig. 6 is a schematic cross-sectional view of an overall structure of a second embodiment of a battery structure with a cap upper bracket according to the present invention, fig. 7 is an enlarged schematic structural view of a portion B of fig. 6, and fig. 9 is an exploded schematic cross-sectional view of an overall structure of a second embodiment of a battery structure with a cap upper bracket according to the present invention.

The present invention provides a battery structure with a cap bracket, which can solve the above technical problems, and the battery structure includes a casing 21, an electric core 22 and a cap 23; the shell 21 is used for mounting components, and the shell 21 is a hollow cylindrical structure with one open end; the battery cell 22 is disposed in the casing 21 for supplying electric power. The cap 23 is disposed at an opening at one end of the casing 21, and is used for sealing the opening of the casing 21 and leading out the positive electrode of the battery cell 22.

Wherein, a sealing structure 211 is arranged at an opening at one end of the housing 21, and the sealing structure 211 is used for limiting the position of the outer side of the cap 23; a bracket 212 for supporting the cap 23 is provided inside the case 21. The present embodiment provides the bracket 212 including an extension portion 2121 and a support portion 2122. The extension 2121 is disposed at one end of the bracket 212 far from the opening of the housing 21, the long side of the extension 2121 is axially parallel to the housing 21, one side of the extension 2121 is connected to the inner wall of the housing 21, and the other side of the extension 2121 is in contact with and insulated from the cap 23. The support part 2122 is located at one end of the bracket 212 far away from the opening of the housing 21, and one end of the support part 2122 is connected to one end of the extension part 2121 close to the opening of the housing 21; and the other end of the support portion 2122 extends along the inside of the case 21 for supporting the battery cap 23.

Referring to fig. 7 and 9, fig. 7 is an enlarged schematic view of a structure at a position B in fig. 6, and fig. 9 is an exploded schematic view of an overall structure section of a second embodiment of a battery structure with a cap upper bracket according to the present invention. The structure of the housing 21 in the present embodiment is explained:

the case 21 in this embodiment is a steel case, and the ratio of the height of the battery to the diameter of the battery is less than or equal to 1.

In this embodiment, the bracket 212 is a cylindrical structure and is sleeved with the cap 23, and the peripheral sidewall of the cap 23 is insulated from the inner wall of the bracket 212. The bracket 212 of this structure facilitates the assembly of the battery product.

In this embodiment, the included angle between the supporting portion 2122 and the extending portion 2121 ranges from 85 ° to 95 °. Preferably, in the present embodiment, an included angle between the supporting portion 2122 and the extending portion 2121 of the bracket 212 is a right angle, so as to support the cap 23.

In this embodiment, the bracket 212 further includes a reinforcing portion 2123 for reinforcing the rigidity of the bracket 212, the reinforcing portion 2123 is located at the bent portion of the bracket 212, one end of the reinforcing portion 2123 is connected to one end of the supporting portion 2122, and the other end of the reinforcing portion 2123 is connected to the extending portion 2121. In the bracket 212 of the present embodiment, the cross section of the reinforcing portion 2123 is larger than the thickness of the supporting portion 2122, and the thickness of the reinforcing portion 2123 is larger than the thickness of the extending portion 2121.

With reference to fig. 9, a structure of the battery cell 22 in this embodiment is described:

the housing 21 is a steel housing in this embodiment, and the housing 21 includes a bottom plate 213 coupled to the 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. The battery cell 22 includes a positive electrode tab 221 and a negative electrode tab 222, 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. A first insulating sheet 223 is arranged between the battery cell 22 and the bottom plate 213, one end of a negative electrode tab 222 is connected with the negative electrode sheet 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 inner side of the bottom plate 213; the first insulating sheet 223 in this embodiment is welded to the bottom plate 213 of the housing 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 23, one end of the positive electrode tab 221 is connected to the positive electrode plate 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 inner side of the connection 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.

With reference to fig. 8, fig. 8 is a schematic diagram of a cap of a battery structure having a cap upper bracket according to a second embodiment of the present invention. The cap 23 in the present embodiment is explained in detail:

in this embodiment, the cap 23 includes a metal connector 231 and an insulating plastic part 232, the metal connector 231 is disposed at the opening of the casing 21, and is connected to the positive electrode tab 221 of the battery cell 22, for leading out the positive electrode of the battery cell 22; an insulating plastic member 232 surrounding the metal connector 231 for insulating and protecting the metal connector 231 from the inner wall of the housing 21; the metal connecting member 231 includes a connecting portion 2311, the connecting portion 2311 is located at the center of the metal connecting member 231, and one end of the positive electrode tab 221 of the battery cell 22 is connected to the connecting portion 2311.

The metal connecting member 231 and the insulating plastic member 232 in this embodiment may be an integrally formed structure.

Referring to fig. 7, the insulating plastic member 232 in the present embodiment includes a first end portion 2321, a second end portion 2323, and an intermediate connecting portion 2322. The first end 2321 is disposed at one end of the insulating plastic part 232 and extends along one side of the metal connecting part 231, so as to isolate and insulate the outer side of the metal connecting part 231 from the inner wall of the housing 21; in the embodiment, the first end 2321 of the insulating plastic member 232 isolates and insulates the metal connecting member 231 from the cell 22 and the sealing structure 211. The second end 2323 is disposed at the other end of the insulating plastic part 232 and extends along the other side of the metal connecting part 231 for isolating and insulating the inner side of the metal connecting part 231 from the inner wall of the housing 21, in this embodiment, the second end 2323 of the insulating plastic part 232 isolates and insulates the inner side of the metal connecting part 231 from the first supporting part 2122; the intermediate connection portion 2322 is disposed at 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 member 232 close to the metal connecting member 231, and the clamping reinforcing rib is used for enhancing the strength of the insulating plastic member 232. Screens strengthening rib and the contact in the metal connecting piece 231 outside in this embodiment, the screens strengthening rib has promoted insulating plastic part 232's compression degree, prevents effectively that insulating plastic part 232 from being pressed 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 inner side of the metal connecting member 231 in a sealing manner, so that the sealing performance and the stability of the cap 23 are improved.

With reference to fig. 5 and fig. 9, in the present embodiment, the metal connecting member 231 includes a connecting portion 2311 for connecting with the positive electrode tab 121 of the battery cell 22; the outer side surface of the metal connecting piece 231 away from the battery cell 22 is provided with an explosion-proof structure. The explosion-proof structure in this embodiment includes a safety valve metal cover 2312 and a heat-sensitive material, preferably a heat-sensitive hot melt adhesive 2313.

In this embodiment, a first groove 2311a is formed in the metal connecting piece 231, which is located outside the connecting portion 2311, a safety valve metal cover 2312 is arranged in the first groove 2311a, the safety valve metal cover 2312 is connected with the metal connecting piece 231 through a first heat-sensitive hot melt adhesive 2313, the connecting portion 2311 of the metal connecting piece 231 is provided with a first air release channel 2311b, and the first air release channel 2311b communicates the first groove 2311a with the inside of the housing 21 for exhausting high-pressure gas generated by the battery cell 22. In this embodiment, the depth of the first groove 2311a is 0.2mm to 1 mm.

The sectional shape of the first groove 2311a in this embodiment is circular, elliptical, or polygonal, and the sectional shape of the safety valve metal cover 2312 matches the sectional shape of the first groove 2311 a.

In the battery structure of the embodiment, in a normal working state of the battery core 22, the safety valve metal cover 2312 fixedly seals the first air leakage channel 2311 through a heat-sensitive material. When the battery generates heat, the surface temperature of the battery core 22 rises to the melting temperature range of the thermosensitive material, the thermosensitive material loses the bonding capability, the safety valve metal cover 2312 is jacked open by the internal gas generated by the battery core 22, the internal high-pressure gas is discharged, and the internal pressure of the battery core 22 is reduced until the battery core 22 recovers to a normal state.

The difference between this embodiment and the first embodiment is that the battery structure of this embodiment prevents the battery from exploding due to the relief valve metal cap 2312 cooperating with the thermosensitive material to release pressure, which improves the safety of the battery.

Referring to fig. 10, 11 and 12, fig. 10 is a perspective view of a third embodiment of a battery structure with a cap upper bracket according to the present invention, fig. 11 is a bottom view of the third embodiment of the battery structure with the cap upper bracket according to the present invention, and fig. 12 is a schematic cross-sectional view of an overall structure of the third embodiment of the battery structure with the cap upper bracket according to the present invention.

The present invention provides a battery structure with a cap support 112, which can solve the above technical problems, and the battery structure includes a casing 31, an electric core 32 and a cap 33; the shell 31 is used for mounting components, and the shell 31 is a hollow cylindrical structure with one open end; the battery cell 32 is arranged in the shell 31 and used for providing electric energy; the cap 33 is disposed at an opening at one end of the casing 31, and is used for sealing the opening of the casing 31 and leading out the positive electrode of the battery cell 32.

Wherein, a sealing structure 311 is arranged at an opening at one end of the shell 31, and the sealing structure 311 is used for limiting the position of the outer side of the cap 33; a holder 312 for supporting the cap 33 is provided inside the housing 31. The bracket 312 provided in this embodiment includes an extension portion 3121 and a support portion 3122; the extending portion 3121 is arranged at one end of the bracket 312 far away from the opening of the shell 31, the long side of the extending portion 3121 is axially parallel to the shell 31, one side of the extending portion 3121 is connected with the inner wall of the shell 31, and the other side of the extending portion 3121 is contacted with the cap 33 and insulated; the support portion 3122 is located at one end of the bracket 312 away from the opening of the housing 31, and the other end of the support portion 3122 extends along the inside of the housing 31 for supporting the cap 33.

With reference to fig. 14 and 15, fig. 14 is an enlarged schematic view of a partial structure of fig. 12, and fig. 15 is an exploded schematic view of an overall structure cross section of a third embodiment of a battery structure with a cap upper bracket according to the present invention. The structure of the housing 31 in the present embodiment will be explained in detail:

in this embodiment, the bottom end of the housing 31 is provided with an explosion-proof structure, which includes a safety valve cover 314 and a heat-sensitive material.

In this embodiment, the heat-sensitive material is preferably a heat-sensitive hot melt adhesive 315.

In this embodiment, the housing 31 in this embodiment includes a bottom plate 313 opposite to the cap 33, and the outer surface of the bottom plate 313 has a second groove 3331; in the present embodiment, the safety valve cover 314 is disposed in the second recess 3331, and the safety valve cover 314 is connected to the metal connecting member 331 through a heat sensitive material. The bottom plate 313 in this embodiment is provided with a second air release channel 3332, and the second air release channel 3332 connects the second groove 3331 with the inside of the housing 31 for exhausting high-pressure gas generated by the battery cell 32. Preferably, the safety valve cover 314 in this embodiment is a metal plate.

The housing 31 in this embodiment is a steel housing, and the ratio of the height of the battery structure to the diameter of the battery is less than or equal to 1, so as to meet the requirements of some button batteries in the market.

Referring to fig. 12 and 13, the structure of the bracket 312 in this embodiment will be described in detail:

in this embodiment, the support 312 is a cylindrical structure and is sleeved with the cap 33, and the peripheral sidewall of the cap 33 is insulated from the inner wall of the support 312. This structure facilitates assembly of the battery product and improves the stability of the support 312 supporting the cap 33 inside the battery.

In this embodiment, an included angle between the supporting portion 3122 and the extending portion 3121 is between 85 ° and 95 °. Preferably, in this embodiment, an included angle between the supporting portion 3122 of the bracket 312 and the extending portion 3121 is a right angle, so as to support the cap 33.

In this embodiment, the bracket 312 further includes a reinforcement portion 3123 for reinforcing rigidity of the bracket 312, the reinforcement portion 3123 is located at a bending portion of the bracket 312, one end of the reinforcement portion 3123 is connected to one end of the support portion 3122, and the other end of the reinforcement portion 3123 is connected to the extension portion 3121. In the bracket 312 of the present embodiment, the cross section of the reinforcement portion 3123 is larger than the thickness of the support portion 3122, and the thickness of the reinforcement portion 3123 is larger than the thickness of the extension portion 3121.

With reference to fig. 15, a structure of the battery cell 32 in this embodiment is described in detail:

the shell 31 in this embodiment is a steel shell, and the shell 31 includes a bottom plate 313 and a cap 33. 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. The battery cell 32 further includes a positive electrode tab 321 and a negative electrode tab 2322, 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. A first insulating sheet 323 is arranged between the electric core 32 and the bottom plate 313, one end of a negative pole lug 322 is connected with a negative pole piece of the electric core 32, and the other end of the negative pole lug 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, the negative electrode tab 322 at one end of the battery cell 32 and the bottom plate 313 of the casing 31 are extrusion-welded from outside to inside, so that the battery cell 32 not only reduces the manufacturing defects of the tab and the pole piece caused by welding the external tab with the negative electrode, but also reduces the internal resistance of the battery cell 32, and improves the storage performance of the battery.

In this embodiment, a second insulating sheet 324 is disposed between the battery cell 32 and the cap 33, one end of the positive electrode tab 321 is connected to the positive electrode plate of the battery cell 32, and the other end of the positive electrode tab 321 penetrates through the first insulating sheet 323 and extends along the inner side of the connecting portion 3311; the second insulating sheet 324 in this embodiment is provided with a plurality of heat dissipation holes for dissipating heat of the battery cell 32.

The cap 33 in the present embodiment will be described in detail with reference to fig. 15:

in this embodiment, the cap 33 includes a metal connector 331 and an insulating plastic part 332, where the metal connector 331 is disposed at an opening of the casing 31, and is connected to the positive electrode tab 321 of the electric core 32, and is used to lead out the positive electrode of the electric core 32; an insulating plastic part 332 surrounding the metal connector 331 for insulating and protecting the metal connector 331 and the inner wall of the housing 31; the metal connecting member 331 includes a connecting portion 3311, the connecting portion 3311 is located at the center of the metal connecting member 331, and one end of the positive electrode tab 321 of the battery cell 32 is connected to the connecting portion 3311.

The metal connecting member 331 and the insulating plastic member 332 in this embodiment may be integrally formed.

Referring to fig. 13, the insulating plastic part 332 of the present 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 extends along one side of the metal connector 331, so as to isolate and insulate the outer side of the metal connector 331 from the inner wall of the housing 31; in the embodiment, the first end portion 3321 of the insulating plastic member 332 isolates and insulates the metal connecting member 331 from the sealing structure 311 on a side away from the battery cell 32. The second end portion 3323 is disposed at the other end of the insulating plastic part 332 and extends along the other side of the metal connector 331, for isolating and insulating the inner side of the metal connector 331 from the inner wall of the housing 31; in this embodiment, the second end portion 3323 of the insulating plastic member 332 isolates and insulates the inner side of the metal connecting member 331 from the first supporting portion 3122; the middle connection part 3322 is disposed in the middle of the insulating plastic member 332 for connecting the first end part 3321 and the second end part 3323, and the middle connection part 3322 is disposed around the metal connector 331 for isolating and insulating the periphery of the metal connector 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 member 331, and the clamping rib is used to enhance the strength of the insulating plastic part 332. The clamping reinforcing ribs in this embodiment contact with the outer side of the metal connecting piece 331, and in the process of assembling the battery, the clamping reinforcing ribs press the metal connecting piece 331 through the sealing structure 311. Screens strengthening rib has promoted insulating plastic part 332's compression degree, prevents effectively that insulating plastic part 332 from being broken by the pressure in stamping process.

In this embodiment, at least one sealing rib 33231 is disposed on a side of the second end portion 3323 of the insulating plastic member 332 close to the metal connector 331, and the sealing rib 33231 is used to connect the second end portion 3323 and the inner side of the metal connector 331 in a sealing manner, so as to improve the sealing performance of the cap 33.

In the battery structure of the embodiment, when the battery core 32 is in a normal operating state, the safety valve cover 314 fixedly seals the second air release channel 3332 through a thermosensitive material. When the battery heats, the surface temperature of the battery core 32 rises to the melting temperature range of the heat-sensitive material, and the heat-sensitive hot melt adhesive 31 loses the bonding capability; the safety valve cover plate 314 is pushed open by the gas generated by the heating of the battery core 32 in the shell 31, and the high-pressure gas in the battery is discharged; thereby reducing the internal pressure of the battery cell 32 until the normal state is restored.

The difference between the third embodiment and the first embodiment is that the battery structure of the present embodiment is configured to release the pressure by the safety valve cover 314 cooperating with the heat-sensitive hot melt adhesive 315, so as to improve the safety of the battery; and the explosion-proof structure of the safety valve can be recycled, so that the service life of the battery is prolonged.

The third embodiment differs from the second embodiment in that the battery structure of the present embodiment, in which the safety valve cover 314 and the heat sensitive material are provided on the bottom plate 313 at one end of the case 31, does not require an extra height direction space for explosion prevention; and the explosion-proof structure of the safety valve does not occupy the space of the finished product of the cap, the thickness of the finished product of the cap is small, and the production and assembly of the battery are facilitated.

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

1. A battery structure with a cap upper bracket is characterized by comprising:

wherein, the inside support that is used for supporting the block of casing, the support includes:

2. The battery structure with the cap upper bracket according to claim 1, wherein the bracket is a cylindrical structure and is sleeved with the cap, and the side wall of the cap is insulated from the inner wall of the bracket.

3. The battery structure with a cap upper bracket according to claim 1, characterized in that: the included angle range between the supporting part and the extending part is between 85 degrees and 95 degrees.

4. The battery structure with the cap upper bracket according to claim 1, wherein the bracket further comprises a reinforcing part for reinforcing the rigidity of the bracket, the reinforcing part is located at a bent part of the bracket, one end of the reinforcing part is connected with one end of the supporting part, and the other end of the reinforcing part is connected with the extending part,

the thickness of the reinforcing part is greater than that of the supporting part, and the thickness of the reinforcing part is greater than that of the extending part.

5. The battery structure with the cap upper support according to claim 1, wherein the battery cell comprises a positive tab and a negative tab, the positive tab of the battery cell is connected with the cap, and the negative tab of the battery cell is connected with the shell;

and the negative pole lug is welded with the bottom plate of the shell from outside to inside.

6. The battery structure with a cap upper cradle of claim 1, wherein the cap comprises:

the metal connecting piece is arranged at one end of the opening of the shell and is used for being connected with a positive electrode lug of the battery cell; and the number of the first and second groups,

the battery cell comprises a metal connecting piece and is characterized in that a connecting portion is arranged at the center of the metal connecting piece, and one end of a positive electrode lug of the battery cell is connected with the connecting portion.

7. The battery structure with a cap upper bracket as claimed in claim 6, wherein the insulating plastic part wraps around the metal connecting part, and the insulating plastic part comprises

the middle connecting part is arranged in the middle of the insulating plastic part, the first end part is connected with the second end part through the middle connecting 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 and the inner wall of the shell.

8. The battery structure with the cap upper bracket as claimed in claim 7, wherein a side of the second end portion close to the metal connecting member is provided with at least one sealing rib, and the sealing rib is connected with the inner side of the metal connecting member and used for sealing and fixing the first end portion with the inner side of the metal connecting member.

9. The battery structure with the cap upper bracket according to claim 8, wherein the outer side surface of the connecting part of the metal connecting piece away from the battery core is provided with an explosion-proof structure.

10. The battery structure with a cap up bracket of claim 1, wherein the ratio of the height of the battery to the diameter of the battery is less than or equal to 1.