CN113972449B

CN113972449B - Battery and electronic product

Info

Publication number: CN113972449B
Application number: CN202111239043.1A
Authority: CN
Inventors: 厉成北; 卫志达; 彭宁
Original assignee: Zhuhai Cosmx Battery Co Ltd
Current assignee: Zhuhai Cosmx Battery Co Ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2024-01-30
Anticipated expiration: 2041-10-25
Also published as: CN113972449A

Abstract

The invention provides a battery and an electronic product, wherein the battery provided by the invention comprises: the battery cell is accommodated in the shell, the shell is electrically connected with the battery cell through two lugs, an opening is formed in the shell, and a through hole corresponding to the opening is formed in one of the two lugs. The invention is used for solving the technical problems of complex process flow and multiple mechanical actions during tab welding.

Description

Battery and electronic product

Technical Field

The present invention relates to the field of battery technologies, and in particular, to a battery and an electronic product.

Background

With the development of various electronic devices, button cells are often used for supplying power to electronic products, such as calculators, electronic scales, remote controllers, vernier calipers, smart bracelets and the like, because of the advantages of small volume, high energy density and the like.

In the existing battery structure, when the tabs are welded, the incoming tabs need to be subjected to procedures of tab correction, tab cutting, tab shaping and the like, and finally the tabs and the shell cover are welded, so that the process flow is complex, mechanical actions are more, and the battery processing efficiency is affected.

Disclosure of Invention

The invention provides a battery and an electronic product, which are used for at least solving the technical problems of complex process flow and multiple mechanical actions during welding of a positive electrode lug.

In order to achieve the above object, the present invention provides a battery comprising: the battery cell is accommodated in the shell, the shell is electrically connected with the battery cell through two lugs, an opening is formed in the shell, and a through hole corresponding to the opening is formed in one of the two lugs.

According to the battery provided by the invention, one of the two lugs is provided with the through hole which is correspondingly communicated with the opening, so that the lug is not limited to the position which is not more than the opening any more, the length of the lug can be longer, the cutting procedure of the incoming material of the lug is not needed, the mechanical action of cutting the lug is omitted, the process flow is simplified, the mechanical action in welding operation is reduced, and the cost can be reduced. The contact area between the tab and the conductive piece arranged on the shell is increased or the contact area between the tab and the shell is increased, and the optional welding area is increased because the tab is longer; the selectivity of the welding fixture is increased, the welding fixture is not limited to the fixture with small holes, the positioning difficulty of the fixture is reduced, the welding difficulty is reduced, the bad deviation when the first tab is welded is also reduced, and the welding effect, the welding strength and the safety performance of the battery of the first tab are improved.

In one possible embodiment, the housing comprises a shell, a conductive member and a cover disposed on the shell, the cover comprising a cover plate;

the conductive piece is connected with the cover plate through the insulating layer, the conductive piece is mutually insulated with the cover plate, a central hole is formed in the cover plate, the conductive piece is provided with a convex part extending into the central hole, the hole is formed in the convex part, one of the two lugs is a first lug, and the first lug is connected with the convex part.

In one possible implementation, the housing includes a shell, a conductive member, and a cover disposed on the shell, the shell including a bottom wall and a side wall, the side wall being connected to an edge of the bottom wall;

the conductive piece is connected with the bottom wall through the insulating layer, the bottom wall is mutually insulated with the conductive piece, a bottom hole is formed in the bottom wall, the conductive piece is provided with a convex part extending into the bottom hole, the hole is formed in the convex part, one of the two lugs is a first lug, and the first lug is connected with the convex part.

the side wall is provided with a side hole, the conductive piece is provided with a convex part extending into the side hole, the hole is formed in the convex part, one of the two tabs is a first tab, and the first tab is connected with the convex part.

In one possible implementation manner, one of the two tabs is a second tab, the housing includes a shell and a shell cover disposed on the shell, the shell includes a bottom wall and a side wall, and the side wall is connected to an edge of the bottom wall;

the second lug is connected with the bottom wall, and the opening is formed in the bottom wall; or (b)

The second lug is connected with the side wall, and the opening is formed in the side wall.

In one possible implementation, the inner diameter of the through hole is greater than or equal to the inner diameter of the opening.

In one possible implementation, the through hole and the open pore are concentrically arranged, and the inner diameter of the through hole is 1 mm-3 mm; the inner diameter of the opening is 1 mm-2 mm.

In one possible implementation manner, the two tabs are respectively welded with the shell, and welding marks are respectively formed on the welding positions of the two tabs and the shell;

the height of the welding mark is 0.02 mm-0.1 mm; and/or

The welding depth of the welding mark is 0.08 mm-0.2 mm; and/or

In the direction parallel to the plane in which the solder marks are located, the sustainable tensile force of the solder marks is greater than or equal to 5N.

In one possible implementation manner, the first tab includes a first section, a second section and a third section which are sequentially connected, the first section is electrically connected with the electric core, and insulating glue is arranged between the second section and the housing;

the third section is connected with the conductive piece, and one end of the third section far away from the second section does not exceed the edge of the convex part.

In one possible implementation, the width of the insulating glue is 0.2 mm-1 mm greater than the width of the first tab;

the first tab is made of metal, and the width of the first tab is 2-4 mm;

the thickness of the first tab is 0.06 mm-0.15 mm.

In one possible implementation, the cross-sectional shape of the through hole is circular, rectangular, polygonal, trapezoidal or diamond.

In one possible embodiment, the solder is round, polygonal, spiral or arc.

In one possible implementation manner, the battery cell includes a first pole piece, a second pole piece and a diaphragm spaced between the first pole piece and the second pole piece, wherein the first pole piece, the second pole piece and the diaphragm are stacked and wound, a first tab of the two tabs is electrically connected with the first pole piece, and a second tab of the two tabs is electrically connected with the second pole piece.

In one possible implementation, the battery cell includes a first pole piece, a second pole piece, and a separator spaced between the first pole piece and the second pole piece, wherein the first pole piece, the second pole piece, and the separator are laminated and wound to form a hollow structure with a cavity in the center;

at least part of the open holes are coincident with the cavity in the orthographic projection direction of the battery cell.

The invention also provides an electronic product comprising the battery. The battery is used for supplying power to the electronic product.

According to the battery provided by the invention, at least part of the open pores are overlapped with the cavity in the orthographic projection direction of the battery cell, so that electrolyte injected into the shell through the open pores can smoothly flow into the cavity, and the infiltration of the battery cell is facilitated.

According to the battery provided by the invention, the inner diameter of the through hole is larger than or equal to that of the open hole, the through hole and the open hole are concentrically arranged, and when electrolyte is injected into the shell through the open hole, the first tab can be prevented from blocking the injection of the electrolyte, and the electrolyte is injected into the shell through the open hole and the through hole.

The height of the welding mark is controlled within a reasonable range, so that the excessively high energy input during welding can be avoided, the occurrence of bad phenomena such as cold welding and the like during welding can be avoided, and the welding effect is improved.

In addition to the technical problems, technical features constituting the technical solutions, and beneficial effects caused by the technical features of the technical solutions described above, other technical problems that can be solved by the battery and the electronic product provided by the embodiments of the present invention, other technical features included in the technical solutions, and beneficial effects caused by the technical features are described in detail in the detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.

Fig. 1 is a state diagram of a conventional battery in which a first tab is welded;

fig. 2 is a schematic perspective view of a battery according to a first embodiment of the present invention;

fig. 3 is an exploded view of a battery case cover according to an embodiment of the present invention;

fig. 4 is a state diagram of a battery according to an embodiment of the present invention when a first tab of the battery is welded;

fig. 5 is a schematic structural diagram of connection between a first tab and a casing cover of a battery according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a connection between a first tab and a case cover of a battery according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a first tab of a battery and a cover forming a solder print according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a battery according to an embodiment of the present invention, in which a first tab and a cover of the battery form another solder;

fig. 9 is a schematic structural diagram of a battery according to an embodiment of the present invention, in which a first tab and a cover of the battery form another solder;

fig. 10 is a schematic structural diagram of a battery according to an embodiment of the present invention, in which a first tab and a cover of the battery form another solder;

fig. 11 is a schematic perspective view of a first tab of a battery according to an embodiment of the present invention;

fig. 12 is a schematic view of another perspective structure of a first tab of a battery according to an embodiment of the present invention;

fig. 13 is a schematic perspective view of a battery according to a second embodiment of the present invention;

fig. 14 is a schematic view showing a bottom wall half-section structure of a battery case according to a second embodiment of the present invention;

fig. 15 is a schematic perspective view of a battery according to a third embodiment of the present invention;

fig. 16 is a schematic side hole half-sectional view of a battery case according to a third embodiment of the present invention.

Reference numerals illustrate:

10-a housing;

11-a housing;

111-a bottom wall;

112-sidewalls;

113-bottom hole;

114-side holes;

12-a shell cover;

121-cover plate;

1211-a central bore;

122-an insulating layer;

123-conductive members;

1231-boss;

124-opening holes;

20-an electric core;

21-a cavity;

30-a receiving cavity;

40-a first tab;

411-first segment;

412-a second section;

413-third stage;

42-through holes;

50-second pole ear;

60-welding;

70-insulating glue.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1, in the conventional battery structure, the tab to be processed needs to undergo the procedures of tab correction, tab cutting, tab shaping, and the like, and finally the tab is welded to the case cover 12, so that the process flow is more, the tab welding step is complicated, the tab welding efficiency is affected, and in addition, when the tab is welded, the tab does not exceed the position of the opening 124, so that the weldable area is limited.

The electrode lug is tightly pressed with the shell cover 12 through the clamp, the stable lamination of the welding part of the electrode lug and the shell cover 12 is ensured, and because the weldable area is limited, small holes are required to be formed in the clamp, the electrode lug and the shell cover 12 are welded through the small holes formed in the clamp, the positioning requirement on the clamp is high, the welding difficulty is increased, defects such as the virtual welding of the electrode lug are easily caused, the defect that the welding position of the electrode lug is easily deviated exists, and the welding effect is influenced.

In view of the above background, the invention provides a battery, the tab is not limited to a position not exceeding the opening, the length of the tab is longer, the tab cutting step is not needed, the tab cutting procedure is omitted, the cutting mechanical action is omitted, the processing efficiency is improved, the tab length is longer, the contact area between the tab and the convex part is increased, the selectable welding area is increased, small holes are not needed to be formed on a clamp pressed between the tab and the shell cover, the welding difficulty is reduced, and defects such as offset, virtual welding and the like are also reduced when the tab is welded.

The battery and the electronic product provided by the embodiment of the invention are described below with reference to the accompanying drawings.

Referring to fig. 2 and 3, the present invention provides a battery including: the battery cell 20 is accommodated in the shell 10, the shell 10 is electrically connected with the battery cell 20 through two lugs, the shell 10 is provided with an opening 124, and one of the two lugs is provided with a through hole 42 which is correspondingly communicated with the opening 124. The opening 124 is used to inject electrolyte into the housing 10.

According to the battery provided by the invention, the through holes 42 which are correspondingly communicated with the holes 124 are formed in the lugs, so that the lugs are not limited to the positions which are not more than the holes 124, the length of the lugs can be longer, the cutting procedure is not needed for the incoming materials of the lugs, and the process flow is simplified.

The housing 10 includes a case 11, a conductive member 123, and a cover 12 provided on the case 11, the case 11 including a bottom wall 111 and a side wall 112, one end of the side wall 112 being connected to an edge of the bottom wall 111. The casing 10 is electrically connected with the battery core 20 through two lugs, one of the two lugs is a first lug, and the other lug is a second lug.

In one possible embodiment, one of the two tabs is welded to the housing 11 or the housing cover 12 of the housing 10, the other of the two tabs is welded to the conductive member 123 of the housing 10, and the two tabs form the weld 60 with the welding position of the housing 10; the height of the solder marks 60 is 0.02 mm-0.1 mm; the welding depth of the welding mark 60 is 0.08 mm-0.2 mm; in a direction parallel to the plane in which the solder marks 60 lie, the solder marks 60 can withstand a tensile force of greater than or equal to 5N. The height and welding depth of the welding mark 60 are controlled within reasonable ranges, so that not only the excessively high energy input during welding can be avoided, but also the bad phenomena such as cold welding and the like can be avoided

Example 1

The housing 10 includes a case 11, a conductive member 123, and a cover 12 provided on the case 11, the cover 12 including a cover 121; the conductive member 123 is connected with the cover plate 121 through the insulating layer 122, the conductive member 123 and the cover plate 121 are mutually insulated, the cover plate 121 is provided with a central hole 1211, the conductive member 123 is provided with a convex part 1231 extending into the central hole 1211, the opening 124 is formed in the convex part 1231, one of the two tabs is a first tab 40, and the first tab 40 is connected with the convex part 1231. The insulating layer 122 may be polypropylene glue, abbreviated as PP glue.

According to the battery provided by the invention, the through hole 42 which is correspondingly communicated with the opening 124 is formed in the first tab 40, so that the first tab 40 is not limited to the position which is not more than the opening 124, the length of the first tab 40 can be longer, the cutting procedure is not needed for the material supplied to the first tab 40, and the process flow is simplified.

Referring to fig. 4 and 5, the battery cell 20 is accommodated in the housing 10, the battery cell 20 is electrically connected to the conductive member 123 through the first tab 40, and the battery cell 20 is also electrically connected to the casing 11 through the second tab 50.

Referring to fig. 2 and 5, at least a portion of the first tab 40 is near an end surface of the battery cell 20 at the opening 124, the first tab 40 is provided with a through hole 42 corresponding to the opening 124, and an inner diameter of the through hole 42 is greater than or equal to an inner diameter of the opening 124. With this structure, when the electrolyte is injected into the case 10 through the opening 124, the first tab 40 can be prevented from blocking the injection of the electrolyte, and the electrolyte is injected into the case 10 through the opening 124 and the through-hole 42 formed in the first tab 40 in this order, thereby immersing the battery cell 20 in the electrolyte.

According to the battery provided by the invention, the length of the first tab 40 is longer, so that the contact area between the first tab 40 and the boss 1231 is increased, welding is easier, the optional welding area is increased, small holes are not required to be formed on the clamp pressed between the first tab 40 and the shell cover 12, the clamp with small holes is not limited to be selected, the selectivity of the welding clamp is increased, the positioning difficulty of the clamp is reduced, the welding difficulty of the optional welding area is greatly reduced, the offset defect during welding of the first tab 40 is also reduced, and the welding effect, the welding strength and the safety performance of the battery of the first tab 40 are improved.

In one possible implementation, the cover plate 121 may be made of nickel ring or stainless steel nickel plating, the conductive member 123 may be made of aluminum or aluminum alloy, and the insulating layer 122 may be made of PP glue.

In one possible implementation, as shown with reference to fig. 3 and 5, the through-hole 42 is disposed concentric with the aperture 124, i.e., the center of the through-hole 42 coincides with the center of the aperture 124.

In one possible implementation, the inner diameter of the through hole 42 is 1mm to 3mm; the inner diameter of the opening 124 is 1mm to 2mm.

In one possible implementation, referring to FIG. 6, the inner diameter of the through hole 42 is 1mm, 2mm, or 3mm, and the inner diameter of the aperture 124 is 1mm. It is also possible that the through hole 42 has an inner diameter of 2mm or 3mm and the opening 124 has an inner diameter of 2mm.

The first tab 40 is welded to the conductive member 123, and the welding position between the first tab 40 and the conductive member 123 forms the welding mark 60.

The two lugs are respectively welded with the shell 10, and welding marks 60 are respectively formed at the welding positions of the two lugs and the shell 10; the height of the solder marks 60 is 0.02 mm-0.1 mm; the welding depth of the welding mark 60 is 0.08 mm-0.2 mm.

In one possible implementation, referring to fig. 7 and 8, the first tab 40 is welded to the boss 1231 of the conductive member 123, and the welding position of the first tab 40 and the boss 1231 forms the welding mark 60, and the height of the welding mark 60 is 0.02mm to 0.1mm. The height of the welding mark 60 is the height of the welding mark 60 protruding out of the surface of the first tab 40, and the height of the welding mark 60 is controlled within a reasonable range, so that not only can the excessively high energy input during welding be avoided, but also the bad phenomena such as cold welding and the like can be avoided.

In one possible implementation, a laser welding mode can be adopted, so that the welding process is free of splashing, and safety is improved.

In one possible implementation, the height of the solder 60 may be 0.02mm, 0.04mm, 0.05mm, 0.08mm, or 0.1mm.

In one possible implementation, the weld depth of the weld 60 is 0.08mm to 0.2mm. For example, the welding depth of the welding mark 60 may be 0.08mm, or may be 0.1mm, 0.12mm, 0.15mm, or 0.2mm.

It is easy to understand that too small a welding depth of the welding mark 60 may cause a cold joint, reducing the tensile force that the welding mark 60 can bear; on the contrary, the welding depth of the welding mark 60 is too large, the welding energy input is too large, the overselding and the thermal deformation of the first tab 40 tab and the shell cover 12 are easy to be caused, and the welding quality requirement can be met by limiting the welding depth of the welding mark 60 to be 0.08-0.2 mm.

In one possible implementation, the tension that the solder 60 can withstand is greater than or equal to 5N in a direction parallel to the plane in which the solder 60 lies. It is readily understood that the tensile force that the solder 60 can withstand may be 5N, or may be 6N, 8N, 10N, etc.

In one possible implementation manner, the number of the welding marks 60 formed by welding the first tab 40 and the boss 1231 is greater than or equal to 1, so as to meet the welding strength requirement.

In one possible implementation, referring to fig. 8, the first tab 40 is welded to the boss 1231 to form two solder marks 60, and the two solder marks 60 are located on two sides of the opening 124.

In one possible implementation, referring to fig. 4 and 8, the first tab 40 includes a first section 411, a second section 412 and a third section 413 connected in sequence, the first section 411 is electrically connected to the battery cell 20, the third section 413 extends to the lower surface of the boss 1231 and is connected to the lower surface of the boss 1231, the second section 412 integrally connects the first section 411 and the third section 413, an insulating paste 70 is provided between the second section 412 and the case 10, and the insulating paste 70 is spaced between the second section 412 and the case 10.

The third section 413 is welded to the lower surface of the boss 1231, so that the welding operation can be performed at the position where the third section 413 is attached to the boss 1231, except for the through hole 42, and the welding area can be selected as an alternative welding area, and the area of the alternative welding area is large.

The third section 413 is connected to the conductive element 123, and an end of the third section 413 remote from the second section 412 does not exceed an edge of the boss 1231. This prevents the third section 413 from excessively protruding to contact the cover plate 121 to cause a short circuit, which is advantageous in improving the safety performance.

In one possible implementation, referring to fig. 4 and 5, third segment 413 extends from one side of aperture 124 to the other side of aperture 124 at the surface of boss 1231, and third segment 413 does not exceed the edge of boss 1231. Therefore, compared with the existing battery, the length of the first tab 40 in the embodiment is longer, the first tab 40 is not required to be limited at a position not exceeding the opening 124, the first tab 40 is not required to be cut, the contact area between the third section 413 and the lower surface of the boss 1231 is increased, the welding area of the first tab 40 is increased, and the welding effect and the welding strength are improved.

In one possible implementation, referring to fig. 9 and 10, the width L1 of the insulation paste 70 is 0.2mm to 1mm greater than the width L2 of the first tab 40, i.e., L1 is 0.2mm to 1mm greater than L2. If the width L1 of the insulating paste 70 is too large, there is a risk that the insulating paste 70 is sandwiched between the case 11 and the case cover 12; on the contrary, if the width L1 of the insulating glue 70 is too small, the insulating effect between the first tab 40 and the cover plate 121 is not ensured, and thus, in this embodiment, the width L1 of the insulating glue 70 is 0.2 mm-1 mm larger than the width L2 of the first tab 40, which is helpful for effectively isolating the insulating glue 70 between the first tab 40 and the housing 11 and between the first tab 40 and the cover plate 121, improving the insulating effect and avoiding short circuit.

In one possible implementation, the width L1 of the insulation paste 70 may be 0.2mm, 0.3mm, 0.5mm, 0.7mm, 0.8mm, or 1mm greater than the width L2 of the first tab 40.

In one possible implementation, the first tab 40 is made of a metal material, and the width L2 of the first tab 40 is 2mm to 4mm.

In one possible implementation, the width L2 of the first tab 40 may be 2mm, 3mm, or 4mm.

In one possible implementation, the thickness of the first tab 40 is 0.06mm to 0.15mm.

In one possible implementation, the thickness of the first tab 40 may be 0.06mm, 0.08mm, 0.1mm, 0.12mm, or 0.15mm.

In one possible implementation, the first tab 40 is aluminum.

In one possible implementation, referring to fig. 11, the cross-sectional shape of the through hole 42 may be circular, referring to fig. 12, the cross-sectional shape of the through hole 42 may be rectangular, and of course, the cross-sectional shape of the through hole 42 may be polygonal, trapezoidal, diamond-shaped, or the like, which is not shown in the figure.

The solder marks 60 are in different shapes according to different trajectories set by the laser beam, and the set trajectories taken by the laser beam become solder marks 60.

In one possible implementation, referring to FIG. 7, the solder 60 is circular in shape; or as shown with reference to fig. 9, the solder 60 is elliptical in shape.

In one possible implementation, referring to FIG. 8, the solder 60 is in the shape of an arc.

In other possible embodiments, the solder 60 may be in the form of a spiral dot, a polygonal shape, a spiral line, or the like, and is not particularly limited herein, so as to stably connect the first tab 40 with the boss 1231. Spiral spot-like, i.e. a spiral weld 60 consisting of several spots.

In one possible implementation, referring to FIG. 7, the solder 60 is a circular shape of 1mm to 3mm, for example, the solder 60 is a circular shape of 1mm, 2mm, or 3 mm.

In one possible implementation, referring to fig. 4 and 7, the battery cell 20 includes a first electrode sheet, a second electrode sheet, and a separator interposed between the first electrode sheet and the second electrode sheet, and the first electrode sheet, the second electrode sheet, and the separator are laminated and wound to form a hollow structure having a cavity 21 at a center, the first tab 40 is electrically connected to the first electrode sheet, and the second tab 50 is electrically connected to the second electrode sheet. The first section 411, which may be a first tab 40, is electrically connected to the cell 20.

After the cover 12 is welded to the housing 11, at least part of the openings 124 coincide with the cavities 21 in the direction of the orthographic projection of the battery cells 20. Thus, the electrolyte injected into the housing 11 through the openings 124 can flow into the cavity 21 to facilitate wetting of the cells 20. Sealing nails are connected in the openings 124 in a sealing manner to prevent electrolyte injected into the casing 10 from leaking from the openings 124.

In one possible implementation, one of the first and second pole pieces is a positive pole piece and the other is a negative pole piece.

In one possible implementation, one of the first tab 40 and the second tab 50 is a positive tab and the other is a negative tab. For example, the first tab 40 is a positive tab, the first pole piece is a positive tab, the second tab 50 is a negative tab, and the second pole piece is a negative tab.

Referring to fig. 2 and 4, the housing 11 includes a bottom wall 111 and a side wall 112, the lower end of the side wall 112 is connected to the edge of the bottom wall 111, the side wall 112 may be integrally formed with the bottom wall 111, the edge of the cover plate 121 is welded to the upper end of the side wall 112, the housing 11 and the housing cover 12 enclose a housing cavity 30 together, and the housing cavity 30 is used for accommodating the battery cell 20. The end face of the battery cell 20 is adhered to the insulating glue 70 to wrap the battery cell 20, so that the first pole piece or the second pole piece of the battery cell 20 is prevented from being in contact with the shell cover 12 to cause short circuit.

In the alternative welding area, the first tab 40 is pressed against the housing cover 12 by a clamp, welding is performed under the pressure of inert gas, and the laser beam follows a set trajectory to connect the first tab 40 with the boss 1231, so that the conductive member 123 at the top of the housing cover 12 becomes the positive electrode of the battery. The second tab 50 is welded to the bottom wall 111 of the case 11 so that the case 11 becomes the negative electrode of the battery.

After the procedures of bending the shell 11, assembling the shell cover 12, welding the edges of the shell cover 12 and the shell 11, injecting liquid into the accommodating cavity 30 and sealing and welding the openings 124, processing the battery into a battery and detecting the tightness; the leak rate of the assembled battery in the helium test seal test is less than 1.0E-6mbar.L/s.

In one possible implementation, the battery is a button cell.

Example two

The second embodiment differs from the first embodiment in that: referring to fig. 13 and 14, the housing 10 includes a case 11, a conductive member 123, and a cover 12 provided on the case 11, the case 11 including a bottom wall 111 and a side wall 112, one end of the side wall 112 being connected to an edge of the bottom wall 111. The conductive member 123 is connected with the bottom wall 111 through the insulating layer 122, the bottom wall 111 and the conductive member 123 are mutually insulated, the bottom wall 111 is provided with a bottom hole 113, the conductive member 123 is provided with a convex part 1231 extending into the bottom hole 113, the opening 124 is formed in the convex part 1231, one of the two tabs is a first tab 40, and the first tab 40 is connected with the convex part 1231.

In this embodiment, the conductive member 123 is connected to the bottom wall 111, the opening 124 is formed in the conductive member 123, the conductive member 123 becomes the positive electrode end or the negative electrode end of the battery, the first tab 40 and the conductive member 123 may be welded, and the first tab 40 is not limited to a position not exceeding the opening 124, so that the length of the first tab 40 may be longer, the cutting process is not required for the material feeding of the first tab 40, the process flow is simplified, and the weldable area of the first tab 40 is increased.

In one possible implementation, the conductive member 123 is connected to the bottom wall 111 of the housing 10, where the conductive member 123 may be connected to an inner bottom surface of the bottom wall 111, or where the conductive member 123 may be connected to an outer surface of the bottom wall 111.

The opening 124 communicates with the bottom hole 113, so that electrolyte can be easily injected into the casing 10 through the opening 124. The bottom hole 113 may be a circular hole, a square hole, an oval hole, etc., and the inside of the opening 124 is hermetically connected with a sealing nail to prevent the electrolyte injected into the inside of the casing 10 from leaking from the opening 124.

In this embodiment, the cover 12 includes a cover 121, the cover 121 may be a flat plate, and an edge of the cover 121 may be welded to an end of the side wall 112 of the housing 11 opposite to the bottom wall 111.

The rest of the first embodiment is not described here again.

Example III

The third embodiment differs from the first embodiment in that: referring to fig. 15 and 16, the housing 10 includes a case 11, a conductive member 123, and a cover 12 provided on the case 11, the case 11 including a bottom wall 111 and a side wall 112, one end of the side wall 112 being connected to an edge of the bottom wall 111. The conductive member 123 is connected with the side wall 112 through the insulating layer 122, the side wall 112 and the conductive member 123 are mutually insulated, the side wall 112 is provided with a side hole 114, the conductive member 123 is provided with a convex part 1231 extending into the side hole 114, the opening 124 is provided on the convex part 1231, one of the two lugs is a first lug 40, and the first lug 40 is connected with the convex part 1231.

In this embodiment, the conductive member 123 is connected to the side wall 112 of the housing 10, a portion of the conductive member 123 exposed out of the side hole 114 becomes the positive electrode end or the negative electrode end of the battery, the opening 124 is formed in the conductive member 123, the electrolyte can be injected into the housing 10 through the opening 124, the first tab 40 and the conductive member 123 can be welded and connected, the first tab 40 is no longer limited to a position not exceeding the opening 124, so that the length of the first tab 40 can be longer, the cutting process is not required for the material feeding of the first tab 40, the process flow is simplified, and the weldable area of the first tab 40 is increased.

In one possible implementation, the conductive member 123 is connected to the side wall 112 of the housing 10, and the conductive member 123 may be connected to an inner side surface of the side wall 112, or the conductive member 123 may be connected to an outer side surface of the side wall 112.

The side holes 114 may be circular holes, square holes, oval holes, etc., and sealing nails are hermetically connected in the openings 124 to prevent electrolyte injected into the casing 10 from leaking from the openings 124.

In one possible implementation, the battery cell 20 includes a first pole piece, a second pole piece, and a separator disposed between the first pole piece and the second pole piece, wherein the first pole piece, the second pole piece, and the separator are stacked and wound, and a first tab 40 of the two tabs is electrically connected to the first pole piece, and a second tab 50 of the two tabs is electrically connected to the second pole piece.

The rest of the first embodiment is not described here again.

Example IV

The fourth embodiment differs from the first embodiment in that: referring to fig. 13, the housing 10 includes a case 11, a conductive member 123, and a cover 12 provided on the case 11, the case 11 including a bottom wall 111 and a side wall 112, one end of the side wall 112 being connected to an edge of the bottom wall 111. One of the two tabs is a second tab 50, the other one of the two tabs is a first tab 40, the second tab 50 is connected with the bottom wall 111, the opening 124 is formed on the bottom wall 111, the second tab 50 is provided with a through hole 42 corresponding to the opening 124, and the first tab 40 is electrically connected with the conductive member 123.

In this embodiment, the second tab 50 is provided with the through hole 42 corresponding to the opening 124, so that the electrolyte is not injected into the housing 11 through the opening 124, the length of the second tab 50 can be longer, the cutting process is not required for the material of the second tab 50, the process flow is simplified, the tab cutting step can be omitted, and the weldable selective area of the second tab 50 is increased.

The second lug 50 is welded to the bottom wall 111, and the welding mark 60 is formed at the connecting position of the second lug 50 and the bottom wall 111, and the height of the welding mark 60 is 0.02 mm-0.1 mm. The height of the solder 60 is the height of the solder 60 protruding out of the surface of the bottom wall 111, and the height of the solder 60 is controlled within a reasonable range, so that not only too high energy input during soldering can be avoided, but also bad phenomena such as cold soldering and the like can be avoided.

The welding depth of the welding mark 60 is 0.08 mm-0.2 mm. For example, the welding depth of the welding mark 60 may be 0.08mm, or may be 0.1mm, 0.12mm, 0.15mm, or 0.2mm.

It is easy to understand that too small a welding depth of the welding mark 60 may cause a cold joint, reducing the tensile force that the welding mark 60 can bear; conversely, the welding depth of the welding mark 60 is too large, the welding energy input is too large, the overselding and the thermal deformation of the second lug 50 and the bottom wall 111 are easy to be caused, and the welding quality requirement can be met by limiting the welding depth of the welding mark 60 to be 0.08-0.2 mm.

In one possible embodiment, the conductive member 123 may be connected to the cover plate 121 of the cover 12 through the insulating layer 122, and the conductive member 123 is insulated from the cover plate 121.

In one possible implementation, the conductive member 123 may be connected to the sidewall 112 of the housing 11 through the insulating layer 122, and the conductive member 123 is insulated from the sidewall 112.

In this embodiment, a sealing nail is hermetically connected to the inside of the opening 124 to prevent the electrolyte injected into the casing 10 from leaking from the opening 124.

The rest of the first embodiment is not described here again.

Example five

The fifth embodiment differs from the first embodiment in that: referring to fig. 13, the housing 10 includes a case 11, a conductive member 123, and a cover 12 provided on the case 11, the case 11 including a bottom wall 111 and a side wall 112, one end of the side wall 112 being connected to an edge of the bottom wall 111. One of the two tabs is a second tab 50, the other one of the two tabs is a first tab 40, the second tab 50 is connected with the side wall 112, the opening 124 is formed on the side wall 112, and the second tab 50 is provided with a through hole 42 corresponding to the opening 124.

In one possible implementation, the conductive member 123 may be connected to the bottom wall 111 of the housing 11 through the insulating layer 122, and the conductive member 123 is insulated from the bottom wall 111.

The rest is the same as the fourth embodiment, and will not be described here again.

The invention also provides an electronic product comprising the battery.

The invention also provides an electronic product, such as a calculator, an electronic scale, a remote controller, a vernier caliper, a smart bracelet, a computer main board and the like, and a battery is used for supplying power.

It should be noted that, the numerical values and numerical ranges referred to in the present application are approximate values, and may have a certain range of errors under the influence of the manufacturing process, and those errors may be considered to be negligible by those skilled in the art.

In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", etc. are used to indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the referred location or element must have a specific orientation, in a specific configuration and operation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly attached, detachably attached, or integrally formed; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can lead the interior of two elements to be communicated or lead the two elements to be in interaction relationship. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. A battery, comprising: the battery cell (20) is accommodated in the housing (10), the housing (10) is electrically connected with the battery cell (20) through two lugs, the housing (10) is provided with an opening (124), and one of the two lugs is provided with a through hole (42) correspondingly communicated with the opening (124);

the shell (10) comprises a shell (11), a conductive piece (123) and a shell cover (12) arranged on the shell (11), wherein the conductive piece (123) is connected with the shell (11) or the shell cover (12) through an insulating layer (122), and the conductive piece (123) is provided with a convex part (1231);

the two lugs are respectively welded with the shell (10);

one of the two tabs is a first tab (40), one of the two tabs is a second tab (50), the first tab (40) comprises a first section (411), a second section (412) and a third section (413) which are sequentially connected, the first section (411) is electrically connected with the battery cell (20), and insulating glue (70) is arranged between the second section (412) and the housing (10); -said third section (413) is connected to said conductive element (123) and the end of said third section (413) remote from said second section (412) does not exceed the edge of said boss (1231);

the battery cell (20) comprises a first pole piece, a second pole piece and a diaphragm which is arranged between the first pole piece and the second pole piece at intervals, wherein the first pole piece, the second pole piece and the diaphragm are laminated and wound to form a hollow structure with a cavity (21) at the center, and at least part of the open pore (124) is overlapped with the cavity (21) in the orthographic projection direction of the battery cell (20).

2. The battery according to claim 1, wherein the cover (12) comprises a cover plate (121);

the conductive piece (123) is connected with the cover plate (121) through the insulating layer (122), the conductive piece (123) is mutually insulated with the cover plate (121), a central hole (1211) is formed in the cover plate (121), the conductive piece (123) is provided with a convex part (1231) extending into the central hole (1211), the opening (124) is formed in the convex part (1231), and the first lug (40) is connected with the convex part (1231).

3. The battery according to claim 1, characterized in that the housing (11) comprises a bottom wall (111) and a side wall (112), the side wall (112) being connected to an edge of the bottom wall (111);

the conductive piece (123) is connected with the bottom wall (111) through the insulating layer (122), just the bottom wall (111) with the conductive piece (123) is mutual insulating, bottom hole (113) have been seted up on the bottom wall (111), the conductive piece (123) have extend to in the bottom hole (113) protruding portion (1231), trompil (124) are seted up on protruding portion (1231), first tab (40) with protruding portion (1231) are connected.

4. The battery according to claim 1, characterized in that the housing (11) comprises a bottom wall (111) and a side wall (112), the side wall (112) being connected to an edge of the bottom wall (111);

the conductive piece (123) is connected with the side wall (112) through the insulating layer (122), just the side wall (112) with the conductive piece (123) is mutual insulating, side opening (114) have been seted up on the side wall (112), the conductive piece (123) have extend to in the side opening (114) boss (1231), trompil (124) are seted up on boss (1231), first tab (40) with boss (1231) are connected.

5. The battery according to claim 1, characterized in that the housing (11) comprises a bottom wall (111) and a side wall (112), the side wall (112) being connected to an edge of the bottom wall (111);

the second lug (50) is connected with the bottom wall (111), and the opening (124) is formed in the bottom wall (111); or (b)

The second lug (50) is connected with the side wall (112), and the opening (124) is formed in the side wall (112).

6. The battery according to any one of claims 1 to 5, wherein the inner diameter of the through hole (42) is greater than or equal to the inner diameter of the opening (124).

7. The battery according to claim 6, wherein the through hole (42) is arranged concentrically with the opening (124), the through hole (42) having an inner diameter of 1mm to 3mm; the inner diameter of the opening (124) is 1 mm-2 mm.

8. The battery according to any one of claims 1 to 5, wherein the two tabs form welding marks (60) with the welding positions of the case (10), respectively;

the height of the welding mark (60) is 0.02 mm-0.1 mm; and/or

The welding depth of the welding mark (60) is 0.08 mm-0.2 mm; and/or

In a direction parallel to the plane in which the solder marks (60) lie, the tensile force that the solder marks (60) can withstand is greater than or equal to 5N.

9. The battery according to claim 1, wherein the width of the insulating paste (70) is 0.2mm to 1mm greater than the width of the first tab (40);

the first tab (40) is made of metal, and the width of the first tab (40) is 2-4 mm;

the thickness of the first tab (40) is 0.06 mm-0.15 mm.

10. The battery according to any one of claims 1 to 5, wherein the cross-sectional shape of the through-hole (42) is circular, rectangular, polygonal, trapezoidal or diamond.

11. The battery according to claim 8, wherein the solder marks (60) are circular, polygonal, spiral or arc-shaped.

12. The battery according to any one of claims 1-5, wherein the cell (20) comprises a first pole piece, a second pole piece, and a separator spaced between the first pole piece and the second pole piece, the first pole piece, the second pole piece, and the separator being stacked and wound, a first tab (40) of the two tabs being electrically connected to the first pole piece, and a second tab (50) of the two tabs being electrically connected to the second pole piece.

13. An electronic product comprising a battery according to any one of claims 1-12.