CN113972449A

CN113972449A - Battery and electronic product

Info

Publication number: CN113972449A
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: 2022-01-25
Anticipated expiration: 2041-10-25
Also published as: CN113972449B

Abstract

The invention provides a battery and an electronic product, wherein the battery provided by the invention comprises: the battery cell comprises a shell and a battery cell, wherein the battery cell is accommodated in the shell, the shell is electrically connected with the battery cell through two tabs, the shell is provided with a hole, and one of the two tabs is provided with a through hole which is correspondingly communicated with the hole. 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 invention relates to the technical field of batteries, in particular to a battery and an electronic product.

Background

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

In the existing battery structure, when tabs are welded, incoming tabs need to be subjected to tab deviation correction, tab cutting, tab shaping and other procedures, and finally the tabs are welded with a shell cover, so that the process flow is complex, mechanical actions are multiple, and the battery processing efficiency is influenced.

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 more mechanical actions during the welding of a positive tab.

In order to achieve the above object, the present invention provides a battery comprising: the battery cell comprises a shell and a battery cell, wherein the battery cell is accommodated in the shell, the shell is electrically connected with the battery cell through two tabs, the shell is provided with a hole, and one of the two tabs is provided with a through hole which is correspondingly communicated with the hole.

According to the battery provided by the invention, one of the two tabs is provided with the through hole which is correspondingly communicated with the open hole, so that the tab is not limited to the position not exceeding the open hole any more, the length of the tab can be longer, the incoming material of the tab does not need to be subjected to a cutting process, the mechanical action of cutting the tab of the tab is omitted, the process flow is simplified, the mechanical action during welding operation is reduced, and the cost can be reduced. Because the length of the tab is longer, 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 selectable welding areas are increased; the selectivity of the welding fixture is increased, the fixture with small holes is not limited to the fixture with small holes, the positioning difficulty of the fixture is reduced, the welding difficulty is reduced, the poor offset during welding of the first tab is reduced, and the welding effect, the welding strength and the safety performance of the battery of the first tab are improved.

In one possible implementation, the housing includes a housing body, a conductive member, and a housing cover disposed on the housing body, the housing cover including a cover plate;

the electric conduction piece passes through the insulating layer with the apron is connected, just the electric conduction piece with the apron is mutual insulation, the centre bore has been seted up to the apron, the electric conduction piece has the convex part that extends to in the centre bore, the trompil is seted up on the convex part, one of them is first utmost point ear of two utmost point ears, first utmost point ear with the convex part is connected.

In a possible implementation mode, the shell comprises a shell body, a conductive piece and a shell cover arranged on the shell body, wherein the shell body comprises a bottom wall and a side wall, and the side wall is connected to the edge of the bottom wall;

the conductive piece is connected with the bottom wall through the insulating layer, the bottom wall and the conductive piece are mutually insulated, 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 tabs is a first tab, and the first tab is connected with the convex part.

electrically conductive piece pass through the insulating layer with the lateral wall is connected, just the lateral wall with electrically conductive mutual insulation, the side opening has been seted up on the lateral wall, electrically conductive piece has and extends to convex part in the side opening, the trompil is seted up on the convex part, one of them of two utmost point ears is first utmost point ear, first utmost point ear with the convex part is connected.

In a 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 tab is connected with the bottom wall, and the opening is formed in the bottom wall; or

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

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

In a possible implementation mode, the through hole and the open hole are arranged concentrically, 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 a possible implementation manner, the two tabs are respectively connected with the shell in a welding mode, and welding marks are formed at the welding positions of the two tabs and the shell respectively;

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

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

In the direction parallel to the plane of the welding seal, the tensile force which can be borne by the welding seal is greater than or equal to 5N.

In a possible implementation manner, the first tab comprises a first section, a second section and a third section which are connected in sequence, the first section is electrically connected with the battery cell, and an 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, which is far away from the second section, does not exceed the edge of the convex part.

In a possible implementation mode, the width of the insulating glue is 0.2mm to 1mm larger than that 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 embodiment, the cross-sectional shape of the through-hole is circular, rectangular, polygonal, trapezoidal or rhombic.

In one possible embodiment, the weld imprint is circular, polygonal, spiral or arc-shaped.

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, 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 to the first pole piece, and a second tab of the two tabs is electrically connected to the second pole piece.

In one possible embodiment, the battery cell comprises a first pole piece, a second pole piece and a diaphragm which is 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 to form a hollow structure with a cavity in the center;

at least part of the opening and the cavity are overlapped in the orthographic projection direction of the battery core.

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 opening is superposed with the cavity in the orthographic projection direction of the battery core, so that the electrolyte injected into the shell through the opening can smoothly flow into the cavity, and the battery core is favorably soaked.

According to the battery provided by the invention, the inner diameter of the through hole is larger than or equal to that of the opening, the through hole and the opening are concentrically arranged, when electrolyte is injected into the shell through the opening, the situation that the first lug obstructs the injection of the electrolyte can be avoided, and the electrolyte is injected into the shell through the opening and the through hole.

According to the battery provided by the invention, 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 insufficient solder and the like during welding can be avoided, and the welding effect is improved.

In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above, other technical problems that can be solved by a battery and an electronic product provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be further 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 needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a state view illustrating a state in which a first tab is welded in a conventional battery;

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

fig. 3 is an exploded view of a cover of a battery 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 is welded;

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

fig. 6 is a schematic structural diagram of a battery according to an embodiment of the present invention, in which a first tab is connected to a case cover;

fig. 7 is a schematic structural diagram illustrating a welding mark formed between a first tab of a battery and a case cover according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram illustrating a first tab of a battery according to an embodiment of the present invention forming a further weld mark with a case cover;

fig. 9 is a schematic structural diagram illustrating a first tab of a battery according to an embodiment of the present invention forming a further weld mark with a case cover;

fig. 10 is a schematic structural view illustrating a first tab of a battery according to an embodiment of the present invention forming a further weld mark with a case cover;

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

fig. 12 is a schematic perspective view illustrating 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 bottom-wall half-sectional view 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-section structure view of a battery case according to a third embodiment of the present invention.

Description of reference numerals:

10-a housing;

11-a housing;

111-a bottom wall;

112-a side wall;

113-bottom hole;

114-a side hole;

12-a shell cover;

121-a cover plate;

1211-central hole;

122-an insulating layer;

123-a conductive member;

1231-convex part;

124-opening holes;

20-electric core;

21-a cavity;

30-an accommodating cavity;

40-a first tab;

411-first paragraph;

412-second segment;

413-a third stage;

42-a through hole;

50-a second tab;

60-welding and printing;

70-insulating glue.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to the existing battery structure shown in fig. 1, the incoming material tab for processing the tab needs to be subjected to the procedures of tab deviation correction, tab cutting, tab shaping and the like, and finally the tab is welded with the case cover 12, so that the process flow is multiple, the tab welding step is complicated, the tab welding efficiency is affected, and when the tab is welded, the tab does not exceed the position of the opening 124, and therefore the weldable area is limited.

Compress tightly through anchor clamps between utmost point ear and the cap 12, ensure that utmost point ear and cap 12's welding position is laminated steadily, because the region of weldable is limited, therefore need set up the aperture on the anchor clamps, carry out utmost point ear and cap 12's welded connection through the aperture of seting up on the anchor clamps, require highly to the anchor clamps location, the welding degree of difficulty increase easily causes utmost point ear rosin joint wait badly, has the defect that utmost point ear welding position takes place the skew easily, influences the welding effect.

In view of the above background, the present invention provides a battery, the tab is not limited to a position not exceeding the opening, the length of the tab is longer, the step of cutting the tab to the tab is not required, the step of cutting the tab is omitted, the mechanical action of cutting is omitted, the improvement of the processing efficiency is facilitated, and the length of the tab is longer, so that the area of the contact area between the tab and the convex portion is increased, the number of the selectable welding areas is increased, the small hole does not need to be formed on the clamp pressed between the tab and the case cover, the difficulty of welding is reduced, and the defects of offset, insufficient welding and the like easily exist during tab welding are also reduced.

The following describes a battery and an electronic product provided by an embodiment of the present invention with reference to the drawings.

Referring to fig. 2 and 3, the present invention provides a battery including: shell 10 and electric core 20, electric core 20 holding is in shell 10, and shell 10 is connected through two utmost point ear electricity with electric core 20, and trompil 124 has been seted up to shell 10, and one of them of two utmost point ears is seted up and is corresponded the through-hole 42 that link up with trompil 124. The opening 124 is used to inject electrolyte into the housing 10.

According to the battery provided by the invention, the through hole 42 which is correspondingly communicated with the open hole 124 is formed in the tab, so that the tab is not limited to the position which is not beyond the open hole 124, the length of the tab can be longer, the cutting process is not required to be carried out on the supplied material of the tab, and the process flow is simplified.

The housing 10 includes a case 11, a conductive member 123, and a case cover 12 disposed on the case 11, the case 11 includes a bottom wall 111 and a side wall 112, and one end of the side wall 112 is connected to an edge of the bottom wall 111. The casing 10 is electrically connected to the battery cell 20 through two tabs, one of which is a first tab, and the other of which is a second tab.

In a 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 respectively form the welding marks 60 with the welding positions of the housing 10; the height of the welding seal 60 is 0.02 mm-0.1 mm; the welding depth of the welding stamp 60 is 0.08 mm-0.2 mm; the solder stamp 60 can withstand a tensile force of greater than or equal to 5N in a direction parallel to the plane of the solder stamp 60. The height and the welding depth of the welding seal 60 are controlled within a reasonable range, which can not only avoid the excessive energy input during welding, but also avoid the bad phenomena of forming false welding and the like during welding

Example one

The housing 10 includes a case 11, a conductive member 123, and a case cover 12 disposed on the case 11, the case cover 12 including a cover plate 121; the conductive element 123 is connected to the cover 121 through the insulating layer 122, the conductive element 123 is insulated from the cover 121, the cover 121 defines a central hole 1211, the conductive element 123 has a protrusion 1231 extending into the central hole 1211, the opening 124 is defined in the protrusion 1231, one of the two tabs is a first tab 40, and the first tab 40 is connected to the protrusion 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 open hole 124 is formed in the first tab 40, so that the first tab 40 is not limited to the position which is not beyond the open hole 124, the length of the first tab 40 can be longer, the incoming material of the first tab 40 does not need to be cut, the process flow is simplified, after the improvement, the incoming material for processing the first tab 40 needs to be subjected to the procedures of tab deviation correction, tab shaping and the like, the step of tab cutting on the first tab 40 is omitted, and finally the first tab 40 is welded with the shell cover 12, so that the process flow is simplified, the welding efficiency of the first tab 40 is improved, the mechanical action during welding operation is reduced, and the cost can be reduced.

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

Referring to fig. 2 and fig. 5, at least a portion of the first tab 40 is located at an end surface of the opening 124 close to the battery cell 20, 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 such a structure, when the electrolyte is injected into the casing 10 through the opening 124, the first tab 40 can be prevented from obstructing the injection of the electrolyte, and the electrolyte is injected into the casing 10 through the opening 124 and the through hole 42 formed in the first tab 40 in sequence, so as to immerse 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 area of a contact area between the first tab 40 and the convex part 1231 is increased, the welding is easier, the number of selectable welding areas is increased, small holes do not need to be formed in a clamp pressed between the first tab 40 and the shell cover 12, the clamp with the small holes is not limited to be selectively formed, the selectivity of welding clamps is increased, the positioning difficulty of the clamp is reduced, the welding difficulty is greatly reduced by the selectable welding areas, poor offset 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 a possible implementation manner, the cover plate 121 may be made of a nickel ring or a stainless steel nickel plating material, the conductive element 123 may be made of an aluminum material or an aluminum alloy material, and the insulating layer 122 may be made of a PP glue.

In one possible embodiment, as shown with reference to fig. 3 and 5, the through hole 42 is concentrically arranged with the opening 124, i.e. the center of the through hole 42 coincides with the center of the opening 124.

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

In one possible embodiment, and with reference to FIG. 6, the bore 42 has an inner diameter of 1mm, 2mm or 3mm, and the bore 124 has an inner diameter of 1 mm. Alternatively, the inner diameter of the through hole 42 may be 2mm or 3mm, and the inner diameter of the opening 124 may be 2 mm.

The first tab 40 is welded to the conductive member 123, and a welding mark 60 is formed at a welding position of the first tab 40 and the conductive member 123.

The two tabs are respectively welded with the shell 10, and welding marks 60 are formed at the welding positions of the two tabs and the shell 10; the height of the welding seal 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 embodiment, referring to fig. 7 and 8, the first tab 40 is welded to the protrusion 1231 of the conductive member 123, and a welding mark 60 is formed at the welding position of the first tab 40 and the protrusion 1231, wherein the height of the welding mark 60 is 0.02mm to 0.1 mm. The height of the welding stamp 60 is the height of the welding stamp 60 protruding out of the surface of the first tab 40, and the height of the welding stamp 60 is controlled within a reasonable range, so that not only can excessive energy input during welding be avoided, but also bad phenomena such as formation of insufficient solder during welding and the like can be avoided.

In a possible implementation mode, a laser welding mode can be adopted, splashing does not exist in the welding process, and safety is improved.

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

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

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

In a possible embodiment, the solder stamp 60 can withstand a tensile force of greater than or equal to 5N in a direction parallel to the plane in which the solder stamp 60 lies. It is easily understood that the solder mark 60 can bear a tensile force of 5N, 6N, 8N, 10N, or the like.

In one possible embodiment, the number of the welding marks 60 formed by welding the first tab 40 and the convex portion 1231 may be equal to or greater than 1, so as to satisfy the welding strength requirement.

In one possible embodiment, referring to fig. 8, the first tab 40 is welded to the projection 1231 to form two welding imprints 60, and the two welding imprints 60 are respectively located at two sides of the opening 124.

In a possible implementation manner, referring to fig. 4 and 8, the first tab 40 includes a first section 411, a second section 412 and a third section 413 which are 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 convex portion 1231 and is connected to the lower surface of the convex portion 1231, the second section 412 integrally connects the first section 411 and the third section 413, an insulating glue 70 is disposed between the second section 412 and the housing 10, and the insulating glue 70 is spaced between the second section 412 and the housing 10.

Since the third segment 413 is connected to the lower surface of the projection 1231 by welding, welding work can be performed at a position where the third segment 413 and the projection 1231 are bonded to each other except for the through hole 42, and an optional welding region having a large area is provided.

The third segment 413 is connected to the conductive member 123, and an end of the third segment 413 away from the second segment 412 does not exceed the edge of the convex portion 1231. Therefore, the third segment 413 can be prevented from being excessively extended to contact the cover plate 121 to cause short circuit, and the use safety performance can be improved.

In one possible embodiment, referring to fig. 4 and 5, the third segment 413 extends from one side of the opening 124 to the other side of the opening 124 on the surface of the convex portion 1231, and the third segment 413 does not exceed the edge of the convex portion 1231. Therefore for current battery, the length of first utmost point ear 40 is longer in this embodiment, need not inject first utmost point ear 40 in the position that does not exceed trompil 124, need not tailor first utmost point ear 40, has increased the area of contact of third section 413 with the lower surface of convex part 1231, has increased the area that first utmost point ear 40 can weld, is favorable to improving welded effect, welding strength.

In one possible embodiment, referring to fig. 9 and 10, the width L1 of the insulating 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 housing 11 and the housing cover 12; on the contrary, if the width L1 of the insulation paste 70 is too small, the insulation effect between the first tab 40 and the cover plate 121 cannot be ensured, and therefore, the width L1 of the insulation paste 70 in the embodiment is 0.2mm to 1mm larger than the width L2 of the first tab 40, which is helpful for effectively isolating the first tab 40 from the housing 11 and the first tab 40 from the cover plate 121 by the insulation paste 70, thereby improving the insulation effect and avoiding short circuit.

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

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

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

In a possible embodiment, the thickness of the first tab 40 is 0.06mm to 0.15 mm.

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

In one possible embodiment, the first tab 40 is made of aluminum.

In a possible embodiment, 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 also be polygonal, trapezoidal, rhombic, etc., which is not shown in the figure.

The weld mark 60 takes on different shapes according to different tracks set by the laser beam, and the set track taken by the laser beam becomes the weld mark 60.

In one possible implementation, and as shown with reference to FIG. 7, the footprint 60 is circular in shape; or as shown with reference to fig. 9, the weld impression 60 is oval-shaped.

In one possible embodiment, and as shown with reference to FIG. 8, the weld impression 60 is in the form of an arc.

In other possible embodiments, the welding mark 60 may also be a spiral point shape, a polygonal shape, a spiral line shape, or the like, and is not particularly limited herein, so as to stably connect the first tab 40 and the protrusion 1231 together. Spiral dots, i.e. a spiral weld impression 60 consisting of several dots.

In one possible embodiment, and as shown with reference to FIG. 7, the solder stamp 60 is in the shape of a circle of 1mm to 3mm, for example the solder stamp 60 is in the shape of a circle of 1mm, 2mm, or 3 mm.

In a possible implementation manner, referring to fig. 4 and 7, the battery cell 20 includes a first pole piece, a second pole piece, and a diaphragm spaced between the first pole piece and the second pole piece, the first pole piece, the second pole piece, and the diaphragm are stacked and wound to form a hollow structure with a cavity 21 in the center, the first tab 40 is electrically connected to the first pole piece, and the second tab 50 is electrically connected to the second pole piece. The first segment 411, which may be a first tab 40, is electrically connected to the battery cell 20.

After the cover 12 is welded to the housing 11, at least part of the opening 124 coincides with the cavity 21 in the orthogonal projection direction of the battery cell 20. Electrolyte injected into the interior of the housing 11 through the opening 124 can flow into the cavity 21, thereby helping to wet the cell 20. A sealing nail is hermetically attached to the opening 124 to prevent the electrolyte injected into the interior of the case 10 from leaking from the opening 124.

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

In one possible embodiment, 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 tab is a positive plate, the second tab 50 is a negative tab, and the second tab is a negative plate.

Referring to fig. 2 and 4, the housing 11 includes a bottom wall 111 and a side wall 112, a lower end of the side wall 112 is connected to an edge of the bottom wall 111, the side wall 112 may be integrally formed with the bottom wall 111, an edge of the cover plate 121 is welded to an upper end of the side wall 112, the housing 11 and the housing cover 12 together enclose a receiving cavity 30, and the receiving cavity 30 is used for placing the battery cell 20 therein. The end face of the battery cell 20 is attached to the insulating adhesive 70, so as to wrap the battery cell 20, and prevent the first pole piece or the second pole piece of the battery cell 20 from contacting the case cover 12 to cause a short circuit.

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

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

In one possible embodiment, the battery is a button battery.

Example two

The difference between the second embodiment and the first embodiment is: referring to fig. 13 and 14, the housing 10 includes a case 11, a conductive member 123, and a case cover 12 disposed 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 element 123 is connected to the bottom wall 111 through the insulating layer 122, the bottom wall 111 and the conductive element 123 are insulated from each other, the bottom wall 111 is provided with a bottom hole 113, the conductive element 123 has a protrusion 1231 extending into the bottom hole 113, the opening 124 is provided on the protrusion 1231, one of the two tabs is a first tab 40, and the first tab 40 is connected to the protrusion 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 a positive terminal or a negative terminal of the battery, the first tab 40 and the conductive member 123 may be welded, and 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 may be longer, the incoming material of the first tab 40 does not need to be cut, the process flow is simplified, and the weldable area of the first tab 40 is increased.

In a possible embodiment, the conductive member 123 is connected to the bottom wall 111 of the housing 10, and the conductive member 123 may be connected to the inner bottom surface of the bottom wall 111, or the conductive member 123 may be connected to the outer surface of the bottom wall 111.

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

In this embodiment, the cover 12 includes a cover plate 121, the cover plate 121 may be a flat plate, and an edge of the cover plate 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 embodiments are the same as those of the first embodiment, and are not described herein again.

EXAMPLE III

The difference between the third embodiment and the first embodiment is that: referring to fig. 15 and 16, the housing 10 includes a case 11, a conductive member 123, and a case cover 12 disposed on the case 11, the case 11 includes a bottom wall 111 and a side wall 112, and one end of the side wall 112 is connected to an edge of the bottom wall 111. The conductive element 123 is connected to the sidewall 112 through the insulating layer 122, the sidewall 112 and the conductive element 123 are insulated from each other, the sidewall 112 is provided with a side hole 114, the conductive element 123 has a protrusion 1231 extending into the side hole 114, the opening 124 is provided on the protrusion 1231, one of the two tabs is a first tab 40, and the first tab 40 is connected to the protrusion 1231.

In this embodiment, the conductive element 123 is connected to the sidewall 112 of the casing 10, a part of the conductive element 123 exposing the side hole 114 becomes a positive terminal or a negative terminal of the battery, the opening 124 is formed in the conductive element 123, and the electrolyte can be injected into the casing 10 through the opening 124, the first tab 40 and the conductive element 123 can be welded and connected, and 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 incoming material of the first tab 40 does not need to be cut, the process flow is simplified, and the weldable area of the first tab 40 is increased.

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

The side hole 114 may be a circular hole, a square hole, an elliptical hole, etc., and a sealing nail is hermetically connected to the inside of the opening 124 to prevent the electrolyte injected into the inside of the case 10 from leaking from the opening 124.

In one possible embodiment, the battery cell 20 includes a first pole piece, a second pole piece, and a diaphragm spaced between the first pole piece and the second pole piece, the first pole piece, the second pole piece, and the diaphragm are stacked and wound, 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.

Example four

The difference between the fourth embodiment and the first embodiment is that: referring to fig. 13, the housing 10 includes a case 11, a conductive member 123, and a case cover 12 disposed on the case 11, the case 11 includes a bottom wall 111 and a side wall 112, and one end of the side wall 112 is connected to an edge of the bottom wall 111. One of the two tabs is a second tab 50, the other 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 in the bottom wall 111, the second tab 50 is provided with a through hole 42 correspondingly penetrating through 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 open hole 124, which does not affect the injection of electrolyte into the casing 11 through the open hole 124, the length of the second tab 50 can be longer, the incoming material of the second tab 50 does not need to be cut, the process flow is simplified, the tab cutting step can be omitted, and the weldable selection area of the second tab 50 is increased.

The second tab 50 is welded with the bottom wall 111, a welding mark 60 is formed at the connecting position of the second tab 50 and the bottom wall 111, and the height of the welding mark 60 is 0.02 mm-0.1 mm. Here, the height of the solder mark 60 is the height of the solder mark 60 protruding from the surface of the bottom wall 111, and the height of the solder mark 60 is controlled within a reasonable range, so that not only can an excessive energy input during soldering be avoided, but also a bad phenomenon such as formation of a cold joint during soldering can be avoided.

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

It is easy to understand that the welding depth of the solder mark 60 is too small, which causes cold joint and reduces the tensile force that the solder mark 60 can bear; on the contrary, the welding depth of the welding stamp 60 is too large, and the welding energy input is too large, so that the over-welding and the thermal deformation of the second tab 50 and the bottom wall 111 are easily caused.

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

In a possible implementation manner, the conductive element 123 may also be connected to the sidewall 112 of the housing 11 through the insulating layer 122, and the conductive element 123 and the sidewall 112 are insulated from each other.

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

EXAMPLE five

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

In a possible embodiment, the conductive member 123 may also be connected to the bottom wall 111 of the housing 11 through the insulating layer 122, and the conductive member 123 and the bottom wall 111 are insulated from each other.

The rest of the embodiments are the same as the fourth embodiment, and are not described herein again.

The invention also provides an electronic product comprising the battery.

The invention also provides an electronic product, such as but not limited to a calculator, an electronic scale, a remote controller, a vernier caliper, an intelligent bracelet, a computer mainboard and the like, wherein the battery is used for supplying power.

It should be noted that the numerical values and numerical ranges referred to in this application are approximate values, and there may be some error due to the manufacturing process, and the error may be considered to be negligible by those skilled in the art.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", and the like, are used to indicate an orientation or positional relationship based on that shown in the drawings, merely to facilitate the description of the invention and to simplify the description, and do not indicate or imply that the position or element referred to must have a particular orientation, be of particular construction and operation, and thus, are not to be construed as limiting the invention.

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

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; either directly or indirectly through intervening media, such as through internal communication or through an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery, comprising: shell (10) and electric core (20), electric core (20) holding is in shell (10), shell (10) with electric core (20) are connected through two utmost point ears electricity, trompil (124) have been seted up in shell (10), one of them seted up of two utmost point ears with through-hole (42) that link up are corresponded in trompil (124).

2. The battery according to claim 1, wherein the housing (10) comprises a case body (11), a conductive member (123), and a case cover (12) provided on the case body (11), the case cover (12) comprising a cover plate (121);

the conductive element (123) is connected with the cover plate (121) through an insulating layer (122), the conductive element (123) and the cover plate (121) are insulated from each other, a central hole (1211) is formed in the cover plate (121), the conductive element (123) is provided with a convex part (1231) extending into the central hole (1211), the hole (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).

3. The battery according to claim 1, wherein the housing (10) comprises a case body (11), a conductive member (123), and a case cover (12) provided on the case body (11), the case body (11) comprising 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 an insulating layer (122), the bottom wall (111) and the conductive piece (123) are mutually insulated, a bottom hole (113) is formed in the bottom wall (111), the conductive piece (123) is provided with a convex part (1231) extending into the bottom hole (113), the hole (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).

4. The battery according to claim 1, wherein the housing (10) comprises a case body (11), a conductive member (123), and a case cover (12) provided on the case body (11), the case body (11) comprising a bottom wall (111) and a side wall (112), the side wall (112) being connected to an edge of the bottom wall (111);

electrically conductive (123) pass through insulating layer (122) with lateral wall (112) are connected, just lateral wall (112) with electrically conductive (123) mutual insulation, side opening (114) have been seted up on lateral wall (112), electrically conductive (123) have and extend to convex part (1231) in side opening (114), trompil (124) are seted up on convex part (1231), one of them of two utmost point ears is first utmost point ear (40), first utmost point ear (40) with convex part (1231) are connected.

5. The battery according to claim 1, wherein one of the two tabs is a second tab (50), the housing (10) comprises a case body (11) and a case cover (12) disposed on the case body (11), the case body (11) comprises a bottom wall (111) and a side wall (112), and the side wall (112) is connected to an edge of the bottom wall (111);

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

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

6. The battery according to any of claims 1-5, 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 concentrically disposed with the opening (124), and an inner diameter of the through hole (42) is 1mm to 3 mm; the inner diameter of the opening (124) is 1 mm-2 mm.

8. The battery according to any one of claims 1-5, wherein the two tabs are respectively connected with the shell (10) in a welding mode, and welding positions of the two tabs respectively with the shell (10) form welding marks (60); the height of the welding seal (60) is 0.02 mm-0.1 mm; and/or

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

In the direction parallel to the plane of the welding seal (60), the tensile force which can be borne by the welding seal (60) is greater than or equal to 5N.

9. The battery according to any one of claims 2 to 4, wherein the first tab (40) comprises a first section (411), a second section (412) and a third section (413) which are connected in sequence, the first section (411) is electrically connected with the battery core (20), and an insulating glue (70) is arranged between the second section (412) and the housing (10);

the third section (413) is connected with the conductive piece (123), and one end, far away from the second section (412), of the third section (413) does not exceed the edge of the convex part (1231).

10. The battery according to claim 9, 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 pole ear (40) is 0.06 mm-0.15 mm.

11. 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 rhombic.

12. The battery according to claim 8, characterized in that the weld impression (60) is circular, polygonal, spiral or arc shaped.

13. The battery of any 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, wherein the first pole piece, the second pole piece, and the separator are stacked and wound, wherein 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.

14. The battery of any of claims 1-3, 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, wherein the first pole piece, the second pole piece, and the separator are laminated and wound to form a hollow structure with a cavity (21) in the center;

at least part of the opening (124) coincides with the cavity (21) in the orthographic projection direction of the battery core (20).

15. An electronic product comprising the battery according to any one of claims 1 to 14.