Button cell convenient to weld

Abstract

The utility model provides a button cell convenient to weld. The button cell convenient to weld comprises a first shell, a first cover plate assembly and a first pole core, the first shell comprises a first containing barrel and a first bottom piece. The two ends of the first containing cylinder are a first end and a second end respectively, and the end face of the second end is perpendicular to the outer side face of the second end. The first cover plate assembly comprises a first upper cover, a first insulating sheet and a first pole; the first upper cover comprises a first top piece and a first clamping ring, one end of the first clamping ring is fixedly connected with the first top piece along the outer edge of the first top piece, an L-shaped cover spigot groove is formed in the inner side of the other end of the first clamping ring and comprises a first wall and a second wall which are perpendicularly connected, the first wall is parallel to the end face of the second end, and the first wall and the second wall are attached to each other. The second wall is welded to the outer side face of the second end. According to the button cell convenient to weld, the phenomenon of poor welding can be effectively avoided, the problem of liquid leakage is avoided, and the performance of the cell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of button batteries, in particular to a button battery that is easy to weld. Background Art

[0002] Button batteries are widely used in all aspects of life, especially in computer motherboards, watches, calculators, Bluetooth headsets, toy walkie-talkies and other related products and fields.

[0003] The comparative document (application number 202222635952.3, entitled "Button-type battery for easy assembly") discloses a button-type battery whose first shell is provided with a snap-on step. The assembly of the first shell and the cover is achieved by the end face of the first snap-on ring abutting against the bottom face of the snap-on step. The snap-on step is formed by stamping the side wall of the first shell. During the stamping process, the side and bottom faces of the snap-on step inevitably form an outer rounded angle. However, during the stamping process of the cover, the end face of the first snap-on ring cannot form an outer rounded angle. When the first shell and the cover are nested and assembled, the cover is subjected to vertical force, which causes the snap-on step to deform. The side wall of the snap-on step cannot fit with the side wall of the first snap-on ring, which makes it easy to have poor welding (cold welding, false welding, etc.) during circumferential welding packaging. Ultimately, the battery seal is poor, leakage occurs, and the battery performance is reduced. In addition, the side wall of the first snap-on ring is relatively thick, which is not conducive to welding during laser welding and is also prone to poor welding.

[0004] Therefore, it is necessary to provide a button battery that is easy to weld to solve the above technical problems. Utility Model Content

[0005] The utility model provides a button-type battery that is easy to weld, which can effectively avoid the phenomenon of poor welding and the problem of liquid leakage, thereby improving the performance of the battery.

[0006] The technical solution of the utility model is:

[0007] A button battery that is easy to weld, comprising:

[0008] The first housing comprises a first accommodating tube and a first bottom plate; the first accommodating tube comprises a first end and a second end, the first end being fixedly connected to the first bottom plate along an edge thereof, and the end surface of the second end being perpendicular to the outer side surface of the second end;

[0009] A first cover plate assembly, comprising a first upper cover, a first insulating sheet and a first pole; the first upper cover comprises a first top sheet and a first snap ring, the first top sheet being annular, one end of the first snap ring being fixedly connected to the first top sheet along the outer edge of the first top sheet, an L-shaped cover stop groove being provided on the inner side of the other end of the first snap ring, the cover stop groove comprising a first wall and a second wall vertically connected, the first wall being parallel to the end face of the second end and the two being in contact, the second wall being welded to the outer side face of the second end; the first insulating sheet being annular, being clamped between the first top sheet and the first pole; and,

[0010] The first pole core is arranged between the first shell and the first cover plate assembly. The first pole core is a wound type or a laminated type. The first pole ear and the second pole ear are respectively provided at both ends of the first pole core. The first pole ear is welded to the first bottom plate, and the second pole ear is welded to the first pole post through the hole of the first insulating plate and the hole of the first top plate.

[0011] In the button-type battery that is easy to weld described in the present invention, the thickness of the side wall of the cover stop groove is 2 / 5-1 / 2 of the thickness of the first clamping ring.

[0012] In the button-type battery easy to weld described in the present invention, the depth of the cover stop groove is 1-2 times the thickness of the first clamping ring.

[0013] In the button-type battery that is easy to weld described in the present invention, the inner edge of the second end is provided with a protruding shell positioning edge along its circumference, the end face of the shell positioning edge is perpendicular to the outer side face of the shell positioning edge, the end face of the shell positioning edge is in contact with the first wall, the height of the shell positioning edge is consistent with the depth of the cover stop groove, and the outer side face of the shell positioning edge is welded to the second wall.

[0014] In the button-type battery easy to weld described in the present invention, the outer surface of the first accommodating tube is aligned with the outer surface of the first clamping ring.

[0015] In the button-type battery that is easy to weld described in the present invention, the height of the first clamping ring is 1 / 6-1 / 5 of the height of the button-type battery that is easy to weld.

[0016] In the button-type battery that is easy to weld described in the present invention, the first pole includes a first pole piece and a first protrusion, the first pole piece is away from the first bottom piece relative to the first top piece, the first insulating piece is clamped between the first pole piece and the first top piece, the first protrusion protrudes from the side of the first pole piece facing the first bottom piece, the first protrusion is passed through the holes of the first insulating piece and the first top piece, and is welded to the second pole ear.

[0017] In the button-type battery that is easy to weld described in the present invention, the first pole includes a second pole piece and a second protrusion, the second pole piece is close to the first bottom piece relative to the first top piece, the first insulating piece is clamped between the second pole piece and the first top piece, the second protrusion protrudes from the side of the second pole piece that is away from the first bottom piece, the second protrusion is passed through the holes of the first insulating piece and the first top piece, and the second pole piece is welded to the second pole ear.

[0018] Another technical solution of the utility model is:

[0019] A button battery that is easy to weld, comprising:

[0020] A second housing includes a second accommodating tube and a second bottom plate; one end of the second accommodating tube is fixedly connected to the second bottom plate along an edge of the second bottom plate, and the inner side of the other end of the second accommodating tube is provided with a shell stop groove, the shell stop groove including a third wall and a fourth wall vertically connected;

[0021] A second cover plate assembly, comprising a second upper cover, a second insulating sheet, and a second pole; the second upper cover comprises a second top sheet and a second snap ring, the second top sheet being annular, the second snap ring having a third end and a fourth end at its two ends, the third end being fixedly connected to the second top sheet along an outer edge of the second top sheet, the end face of the fourth end being perpendicular to and abutting against the outer side face of the fourth end, the end face of the fourth end being parallel to and abutting against the third wall, and the outer side face of the fourth end being welded to the fourth wall; the second insulating sheet being annular, being clamped between the second top sheet and the second pole; and,

[0022] The second pole core is arranged between the second shell and the second cover plate assembly. The second pole core is a wound type or a laminated type. The second pole core is respectively provided with a third pole tab and a fourth pole tab at both ends. The third pole tab is welded to the second bottom plate, and the fourth pole tab is welded to the second pole post through the hole of the second insulating sheet and the hole of the second top plate.

[0023] In the button-type battery that is easy to weld described in the present invention, the inner edge of the fourth end is provided with a protruding cover positioning edge along its circumference, the end face of the cover positioning edge is perpendicular to the outer side face of the cover positioning edge, the end face of the cover positioning edge is parallel to and abuts the third wall, the height of the cover positioning edge is consistent with the depth of the shell stop groove, and the outer side face of the cover positioning edge is welded to the fourth wall.

[0024] Compared with the prior art, the present invention has the following beneficial effects: the button-type battery of the present invention is easy to weld. During processing, the angle between the first wall and the second wall of the cover stop groove is 90°, and the angle between the end face of the second end and the side face of the second end is also 90°. When the first upper cover and the first outer shell are assembled, the second end can be positioned and installed in the cover stop groove, with the end face of the second end abutting the first wall and the side face of the second end abutting the second wall, making it less likely to have poor welding during circumferential welding. In addition, the side walls of the cover stop groove are relatively thin, making it easier for the side face of the second end to fuse with the second wall during laser welding. The button-type battery of the present invention is easy to weld, which can effectively avoid poor welding and leakage problems, thereby improving battery performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0026] Figure 1 A schematic cross-sectional structure diagram of a button-type battery that is easy to weld, provided in the first preferred embodiment of the present utility model.

[0027] Figure 2 Another schematic cross-sectional view of the button-type battery that is easy to weld provided in the first preferred embodiment of the present utility model.

[0028] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A.

[0029] Figure 4 This is a schematic diagram of the exploded structure of a button-type battery that is easy to weld, provided in the first preferred embodiment of the present utility model.

[0030] Figure 5 Schematic diagram of the exploded structure of the first cover plate assembly of the button-type battery that is easy to weld provided in the first preferred embodiment of the present invention.

[0031] Figure 6 A schematic cross-sectional structural diagram of a first cover plate assembly of a button-type battery that is easy to weld, provided in the first preferred embodiment of the present utility model.

[0032] Figure 7 for Figure 6 Schematic diagram of the enlarged structure of part B.

[0033] Figure 8 A schematic cross-sectional structure diagram of a button-type battery that is easy to weld, provided in the second preferred embodiment of the present utility model.

[0034] Figure 9 for Figure 8Schematic diagram of the enlarged structure of part C.

[0035] Figure 10 A schematic cross-sectional view of a partial structure of a button-type battery that is easy to weld, provided in the third preferred embodiment of the present utility model.

[0036] Figure 11 A schematic cross-sectional view of a button-type battery that is easy to weld, provided in accordance with the fourth preferred embodiment of the present invention.

[0037] Figure 12 This is a schematic cross-sectional structural diagram of a second shell of a button battery that is easy to weld, provided in the fourth preferred embodiment of the present utility model.

[0038] Figure 13 A schematic cross-sectional view of a button-type battery that is easy to weld, provided in accordance with the fifth preferred embodiment of the present invention.

[0039] Figure 14 for Figure 13 Schematic diagram of the enlarged structure of part D.

[0040] in, Figure 1-Figure 7 The logo is as follows:

[0041] 11. The first shell,

[0042] 111, first accommodating cylinder, 1111, first end, 1112, second end,

[0043] 112. The first negative,

[0044] 12. The first cover assembly,

[0045] 121. First cover,

[0046] 1211, the first top sheet,

[0047] 1212, first clamping ring,

[0048] 12121, cover stop groove, 12122, first wall, 12123, second wall,

[0049] 122. A first insulating sheet,

[0050] 123, first pole, 1231, first pole piece, 1232, first protrusion,

[0051] 13. First pole core, 131. First pole tab, 132. Second pole tab.

[0052] Figure 8 and Figure 9 The logo is as follows:

[0053] 21. Second end, 211. Shell positioning edge,

[0054] 22. The first wall,

[0055] 23. The second wall,

[0056] 24. First clamping ring,

[0057] 25. First accommodating tube.

[0058] Figure 10 The logo is as follows:

[0059] 31, first pole, 311, second pole piece, 312, second protrusion,

[0060] 32. The first top sheet,

[0061] 33. First insulating sheet.

[0062] Figure 11 and Figure 12 The logo is as follows:

[0063] 41. Second shell,

[0064] 411, second accommodating tube, 4111, shell stop groove, 41111, third wall, 41112, fourth wall, 412, second bottom film,

[0065] 42. Second cover plate assembly,

[0066] 421, the second cover,

[0067] 4211, second top sheet,

[0068] 4212, second clamping ring, 42121, third end, 42122, fourth end,

[0069] 422. Second insulating sheet,

[0070] 423. Second pole.

[0071] Figure 13 and Figure 14 The logo is as follows:

[0072] 51, fourth end, 511, cover positioning edge,

[0073] 52. The third wall,

[0074] 53. The fourth wall,

[0075] 54. Second accommodating tube,

[0076] 55. Second clamping ring.

[0077] In the figures, structurally similar elements are denoted by the same reference numerals. DETAILED DESCRIPTION

[0078] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0079] Directional terms mentioned in this invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only used with reference to the directions of the drawings. The directional terms used are used to illustrate and understand the invention, and are not intended to limit the invention.

[0080] The terms "first" and "second" in the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, nor as limiting the order of precedence.

[0081] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0082] The comparative document (application number 202222635952.3, entitled "Button-type battery for easy assembly") discloses a button-type battery whose first shell is provided with a snap-on step. The assembly of the first shell and the cover is achieved by the end face of the first snap-on ring abutting against the bottom face of the snap-on step. The snap-on step is formed by stamping the side wall of the first shell. During the stamping process, the side and bottom faces of the snap-on step inevitably form an outer rounded angle. However, during the stamping process of the cover, the end face of the first snap-on ring cannot form an outer rounded angle. When the first shell and the cover are nested and assembled, the cover is subjected to vertical force, which causes the snap-on step to deform. The side wall of the snap-on step cannot fit with the side wall of the first snap-on ring, which makes it easy to have poor welding (cold welding, false welding, etc.) during circumferential welding packaging. Ultimately, the battery seal is poor, leakage occurs, and the battery performance is reduced. In addition, the side wall of the first snap-on ring is relatively thick, which is not conducive to welding during laser welding and is also prone to poor welding.

[0083] The following is a preferred embodiment of a button-type battery that is easy to weld and can solve the above technical problems provided by the present invention.

[0084] Please refer to Figure 1-Figure 7 The first preferred embodiment of the present invention provides a button-type battery that is easy to weld, which includes a first outer shell 11, a first cover assembly 12, and a first pole core 13. The first outer shell 11 includes a first accommodating tube 111 and a first bottom plate 112. The two ends of the first accommodating tube 111 are respectively a first end 1111 and a second end 1112. The first end 1111 is fixedly connected to the first bottom plate 112 along the edge of the first bottom plate 112, and the end surface of the second end 1112 is perpendicular to the outer side surface of the second end 1112. The first cover assembly 12 includes a first upper cover 121, a first insulating sheet 122, and a first pole 123. The first upper cover 121 includes a first top sheet 1211 and a first snap ring 1212. The first top sheet 1211 is annular, with one end of the first snap ring 1212 fixedly connected to the first top sheet 1211 along its outer edge. An L-shaped cover stop groove 12121 is provided on the inner side of the other end of the first snap ring 1212. The cover stop groove 12121 includes a first wall 12122 and a second wall 12123 that are perpendicular to each other. The first wall 12122 is parallel to the end surface of the second end 1112 and fits in place. The second wall 12123 is welded to the outer side surface of the second end 1112. The first insulating sheet 122 is annular and is clamped between the first top sheet 1211 and the first pole 123. The first pole core 13 is arranged between the first shell 11 and the first cover plate assembly 12. The first pole core 13 is of a wound or laminated type. The first pole ear 131 and the second pole ear 132 are respectively provided at both ends of the first pole core 13. The first pole ear 131 is welded to the first bottom sheet 112, and the second pole ear 132 is welded to the first pole column 123 through the hole of the first insulating sheet 122 and the hole of the first top sheet 1211.

[0085] The first upper cover 121 is stamped and formed from stainless steel or other metal materials. The first insulating sheet 122 provides insulation and sealing for the battery polarity. It is preferably made of PP composite film or other plastic film. The first terminal 123 is preferably made of stainless steel, aluminum alloy, or other metal materials. The first housing 11 is preferably formed of stainless steel.

[0086] The button-type battery of the present invention is easy to weld. During processing, the angle between the first wall 12122 and the second wall 12123 of the cover stop groove 12121 is 90°. The angle between the end surface of the second end 1112 and the side surface of the second end 1112 is also 90°. When the first upper cover 121 and the first outer shell 11 are assembled, the second end 1112 can be positioned and installed in the cover stop groove 12121, with the end surface of the second end 1112 abutting the first wall 12122 and the side surface of the second end 1112 abutting the second wall 12123. This makes it less likely to cause poor welding during circumferential welding. In addition, the side walls of the cover stop groove 12121 are relatively thin, making it easier to weld the side surface of the second end 1112 to the second wall 12123 during laser welding. The button-type battery of the present invention is easy to weld. It can effectively avoid poor welding and leakage problems, thereby improving battery performance.

[0087] Please refer to Figure 7 The side wall thickness of the cover stop groove 12121 is 2 / 5-1 / 2 of the thickness of the first snap ring 1212. If the side wall of the cover stop groove 12121 is too thick, the side surface of the second end 1112 and the second wall 12123 will not be easily welded during laser welding; if the side wall of the cover stop groove 12121 is too thin, the side wall of the cover stop groove 12121 will be easily deformed when the second end 1112 is assembled into the cover stop groove 12121. In the above structure, the side wall thickness of the cover stop groove 12121 is 2 / 5-1 / 2 of the thickness of the first snap ring 1212. Under the premise that the side wall of the cover stop groove 12121 is not easily deformed, the side surface of the second end 1112 and the second wall 12123 will be easily welded during laser welding.

[0088] Please continue to refer to Figure 7 The depth of the cover stop groove 12121 (the dimension of the cover stop groove 12121 along the axial direction of the first snap ring 1212) is 1-2 times the thickness of the first snap ring 1212. If the depth of the cover stop groove 12121 is too deep, the welding workload will be large; if the depth of the cover stop groove 12121 is too shallow, the welding area between the side surface of the second end 1112 and the second wall 12123 will not be large enough, and they will easily separate. In the above structure, the depth of the cover stop groove 12121 is 1-2 times the thickness of the first snap ring 1212, which ensures that the side surface of the second end 1112 and the second wall 12123 will not separate, thereby reducing the welding workload.

[0089] Please refer to Figure 1The first electrode 123 includes a first electrode piece 1231 and a first protrusion 1232. The first electrode piece 1231 is located away from the first bottom sheet 112 relative to the first top sheet 1211. The first insulating sheet 122 is sandwiched between the first electrode piece 1231 and the first top sheet 1211. The first protrusion 1232 protrudes from the side of the first electrode piece 1231 facing the first bottom sheet 112. The first protrusion 1232 passes through the hole between the first insulating sheet 122 and the first top sheet 1211 and is welded to the second electrode tab 132. With this structure, the first protrusion 1232 can be brought closer to the second electrode tab 132, facilitating welding of the first protrusion 1232 to the second electrode tab 132.

[0090] Please refer to Figure 1 , the height of the first snap ring 1212 is 1 / 6-1 / 5 of the height of the button battery that is easy to weld. During assembly, the electrolyte is first injected into the first shell 11, and then the first cover assembly 12 is covered. When the overall height of the button battery is fixed, if the height of the first snap ring 1212 is too high, the height of the first accommodating tube 111 is low, and the amount of electrolyte that can be accommodated is relatively small. If the height of the first snap ring 1212 is too low, it is not convenient to stamp out the first snap ring 1212. In the above structure, the height of the first snap ring 1212 is 1 / 6-1 / 5 of the height of the button battery that is easy to weld, and as much electrolyte as possible can be accommodated under the premise of being convenient for stamping out the first snap ring 1212.

[0091] Please refer to Figure 8 and Figure 9 The second preferred embodiment of the present invention provides a button-type battery that is easy to weld. This differs from the button-type battery of the first preferred embodiment in that a protruding shell positioning edge 211 is provided along the circumference of the inner edge of the second end 21. The end surface of the shell positioning edge 211 is perpendicular to the outer side surface of the shell positioning edge 211. The end surface of the shell positioning edge 211 is aligned with the first wall 22. The height of the shell positioning edge 211 is consistent with the depth of the cover stop groove. The outer side surface of the shell positioning edge 211 is welded to the second wall 23. In this structure, the height of the shell positioning edge 211 is consistent with the depth of the cover stop groove. This ensures that when the end surface of the first clamping ring 24 abuts the second end 21, the end surface of the shell positioning edge 211 is aligned with the first wall 22, making it easier to check whether the battery is properly installed.

[0092] The outer surface of the first accommodating tube 25 is aligned with the outer surface of the first clamping ring 24. With this structure, the outer surface of the button battery that is easy to weld can be flat, making it easy to install in electronic products.

[0093] Please refer to Figure 10The third preferred embodiment of the present invention provides a button-type battery that is easy to weld. This differs from the button-type battery that is easy to weld in the first preferred embodiment in that the first electrode 31 includes a second electrode piece 311 and a second protrusion 312. The second electrode piece 311 is closer to the first bottom piece than the first top piece 32. The first insulating sheet 33 is sandwiched between the second electrode piece 311 and the first top piece 32. The second protrusion 312 protrudes from the side of the second electrode piece 311 that faces away from the first bottom piece. The second protrusion 312 passes through a hole between the first insulating sheet 33 and the first top piece 32. The second electrode piece 311 is welded to the second tab. This structure allows the second electrode piece 311 to be closer to the second tab, facilitating welding between the two tabs.

[0094] Please refer to Figure 11 and Figure 12 The fourth preferred embodiment of the present invention provides a button-type battery that is easy to weld, which includes a second outer shell 41, a second cover assembly 42, and a second pole core. The second outer shell 41 includes a second accommodating tube 411 and a second bottom plate 412. One end of the second accommodating tube 411 is fixedly connected to the second bottom plate 412 along the edge of the second bottom plate 412, and the inner side of the other end is provided with a shell stop groove 4111. The shell stop groove 4111 includes a third wall 41111 and a fourth wall 41112 that are vertically connected. The second cover assembly 42 includes a second upper cover 421, a second insulating sheet 422, and a second pole 423. The second upper cover 421 includes a second top sheet 4211 and a second snap ring 4212. The second top sheet 4211 is annular, and the second snap ring 4212 has a third end 42121 and a fourth end 42122. The third end 42121 is fixedly connected to the second top sheet 4211 along the outer edge of the second top sheet 4211. The end surface of the fourth end 42122 is perpendicular to the outer side surface of the fourth end 42122, parallel to and abutting the third wall 41111, and the outer side surface of the fourth end 42122 is welded to the fourth wall 41112. The second insulating sheet 422 is annular and is clamped between the second top sheet 4211 and the second pole 423. The second pole core is arranged between the second shell 41 and the second cover plate assembly 42. The second pole core is a wound type or a laminated type. The third pole ear and the fourth pole ear are respectively provided at both ends of the second pole core. The third pole ear is welded to the second bottom plate 412, and the fourth pole ear is welded to the second pole column 423 through the hole of the second insulating sheet 422 and the hole of the second top plate 4211.

[0095] The button-type battery of the present invention is easy to weld. During processing, the angle between the third wall 41111 and the fourth wall 41112 of the shell stop groove 4111 is 90°. The angle between the end face of the fourth end 42122 and the side face of the fourth end 42122 is also 90°. When the second upper cover 421 is assembled with the second outer shell 41, the fourth end 42122 can be positioned and installed in the shell stop groove 4111. The end face of the fourth end 42122 abuts the third wall 41111, and the side face of the fourth end 42122 abuts the fourth wall 41112. This makes it less likely to cause poor welding during circumferential welding. In addition, the side walls of the shell stop groove 4111 are relatively thin, making it easier for the side face of the fourth end 42122 to fuse with the fourth wall 41112 during laser welding. The button-type battery of the present invention is easy to weld. It can effectively avoid poor welding and leakage problems, thereby improving battery performance.

[0096] Please refer to Figure 13 and Figure 14 The fifth preferred embodiment of the present invention provides a button-type battery that is easily welded. This differs from the button-type battery of the fourth preferred embodiment in that a protruding cover positioning edge 511 is provided along the circumference of the inner edge of the fourth end 51. The end surface of the cover positioning edge 511 is perpendicular to the outer side surface of the cover positioning edge 511, and the end surface of the cover positioning edge 511 is parallel to and abuts the third wall 52. The height of the cover positioning edge 511 is consistent with the depth of the shell stop groove, and the outer side surface of the cover positioning edge 511 is welded to the fourth wall 53. In this structure, the height of the cover positioning edge 511 is consistent with the depth of the shell stop groove, so that when the end surface of the second accommodating tube 54 abuts the second clamping ring 55, the end surface of the cover positioning edge 511 is in contact with the third wall 52, making it easy to check whether it is properly installed.

[0097] The assembly process of the button-type battery that is easy to weld in the preferred embodiment of the present utility model (taking the first preferred embodiment as an example):

[0098] 1. The first upper cover 121, the first insulating sheet 122 and the first pole 123 are hot-pressed together to form a first cover plate assembly 12 as an integrated assembly;

[0099] 2. The first electrode core 13 is installed in the first housing 11 and the electrolyte is injected;

[0100] 3. Install the first cover assembly 12 into the first housing 11 so that the first wall 12122 is in contact with the end surface of the second end 1112 and the second wall 12123 is in contact with the side surface of the second end 1112;

[0101] 4. Weld the second wall 12123 and the side surface of the second end 1112 together by laser welding;

[0102] 5. Weld the first electrode tab 131 and the first bottom plate 112 together, and weld the second electrode tab 132 and the first protrusion 1232 together by resistance welding or laser welding.

[0103] This completes the assembly process of the button-type battery that is easy to weld in this preferred embodiment.

[0104] The button-type battery of the present invention is easy to weld. During processing, the angle between the first wall and the second wall of the cover stop groove is 90°, and the angle between the end face of the second end and the side face of the second end is also 90°. When the first upper cover and the first outer shell are assembled, the second end can be positioned and installed in the cover stop groove, with the end face of the second end abutting the first wall and the side face of the second end abutting the second wall. This makes it less likely that poor welding will occur during circumferential welding. In addition, the side walls of the cover stop groove are relatively thin, making it easier for the side face of the second end to fuse with the second wall during laser welding. The button-type battery of the present invention is easy to weld. It can effectively avoid poor welding and leakage problems, thereby improving battery performance.

[0105] To sum up, although the present invention has been disclosed as above in terms of preferred embodiments, the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent substitutions or changes based on the concept of the technical solution of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A button battery that is easy to weld, characterized in that: include: A first housing including a first accommodating tube and a first bottom film; The first receiving tube comprises a first end and a second end, wherein the first end is fixedly connected to the first bottom film along an edge of the first bottom film, and an end surface of the second end is perpendicular to an outer side surface of the second end; A first cover plate assembly, comprising a first upper cover, a first insulating sheet and a first pole; the first upper cover comprises a first top sheet and a first snap ring, the first top sheet being annular, one end of the first snap ring being fixedly connected to the first top sheet along the outer edge of the first top sheet, an L-shaped cover stop groove being provided on the inner side of the other end of the first snap ring, the cover stop groove comprising a first wall and a second wall vertically connected, the first wall being parallel to the end face of the second end and the two being in contact, the second wall being welded to the outer side face of the second end; the first insulating sheet being annular, being clamped between the first top sheet and the first pole; and, The first pole core is arranged between the first shell and the first cover plate assembly. The first pole core is a wound type or a laminated type. The first pole ear and the second pole ear are respectively provided at both ends of the first pole core. The first pole ear is welded to the first bottom plate, and the second pole ear is welded to the first pole post through the hole of the first insulating plate and the hole of the first top plate.

2. The button battery that is easy to weld according to claim 1, characterized in that: The side wall thickness of the cover stop groove is 2 / 5-1 / 2 of the thickness of the first clamping ring.

3. The button-type battery that is easy to weld according to claim 1, characterized in that: The depth of the cover stop groove is 1-2 times the thickness of the first clamping ring.

4. The button-type battery that is easy to weld according to claim 1, characterized in that: The inner edge of the second end is provided with a protruding shell positioning edge along its circumference, the end face of the shell positioning edge is perpendicular to the outer side surface of the shell positioning edge, the end face of the shell positioning edge is in contact with the first wall, the height of the shell positioning edge is consistent with the depth of the cover stop groove, and the outer side surface of the shell positioning edge is welded to the second wall.

5. The button-type battery that is easy to weld according to claim 4, characterized in that: An outer surface of the first accommodating tube is aligned with an outer surface of the first clamping ring.

6. The button-type battery that is easy to weld according to claim 1, characterized in that: The height of the first clamping ring is 1 / 6-1 / 5 of the height of the button-type battery that is convenient for welding.

7. The button-type battery that is easy to weld according to claim 1, characterized in that: The first pole includes a first pole piece and a first protrusion. The first pole piece is away from the first bottom piece relative to the first top piece. The first insulating piece is clamped between the first pole piece and the first top piece. The first protrusion protrudes from the side of the first pole piece facing the first bottom piece. The first protrusion passes through the holes of the first insulating piece and the first top piece and is welded to the second pole ear.

8. The button-type battery that is easy to weld according to claim 1, characterized in that: The first pole includes a second pole piece and a second protrusion, the second pole piece is close to the first bottom piece relative to the first top piece, the first insulating piece is clamped between the second pole piece and the first top piece, the second protrusion protrudes from the side of the second pole piece facing away from the first bottom piece, the second protrusion is passed through the holes of the first insulating piece and the first top piece, and the second pole piece is welded to the second pole ear.

9. A button battery that is easy to weld, characterized in that: include: A second housing includes a second accommodating tube and a second bottom plate; one end of the second accommodating tube is fixedly connected to the second bottom plate along an edge of the second bottom plate, and the inner side of the other end of the second accommodating tube is provided with a shell stop groove, the shell stop groove including a third wall and a fourth wall vertically connected; A second cover plate assembly, comprising a second upper cover, a second insulating sheet, and a second pole; the second upper cover comprises a second top sheet and a second clamping ring, the second top sheet being annular, the second clamping ring having a third end and a fourth end at its two ends, the third end being fixedly connected to the second top sheet along an outer edge of the second top sheet, the end surface of the fourth end being perpendicular to and abutting against the outer side surface of the fourth end, the end surface of the fourth end being parallel to and abutting against the third wall, and the outer side surface of the fourth end being welded to the fourth wall; the second insulating sheet being annular, and being clamped between the second top sheet and the second pole; as well as, The second pole core is arranged between the second shell and the second cover plate assembly. The second pole core is a wound type or a laminated type. The second pole core is respectively provided with a third pole tab and a fourth pole tab at both ends. The third pole tab is welded to the second bottom plate, and the fourth pole tab is welded to the second pole post through the hole of the second insulating sheet and the hole of the second top plate.

10. The button-type battery easy to weld according to claim 9, characterized in that: The inner edge of the fourth end is provided with a protruding cover positioning edge along its circumference, the end face of the cover positioning edge is perpendicular to the outer side face of the cover positioning edge, the end face of the cover positioning edge is parallel to and abuts against the third wall, the height of the cover positioning edge is consistent with the depth of the shell stop groove, and the outer side face of the cover positioning edge is welded to the fourth wall.

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