CN221239752U - Battery cell - Google Patents

Abstract

The utility model relates to a battery, comprising a bare cell; the battery cell shell is used for accommodating the bare battery cell; the pole is arranged on the battery core shell; and the tab is arranged on the bare cell, the battery further comprises a recombination zone, the recombination zone is arranged on the pole, at least part of the recombination zone extends from one surface of the pole far away from the tab to the other surface, the pole further comprises an extension section, at least part of the extension section is combined with the pole to form a combination zone, the part of the extension section can extend towards one surface of the pole to form the combination zone, the extension section can extend to combine with the pole to form the combination zone, when the welding equipment performs welding on the pole, the recombination zone is formed on the pole and connected with the combination zone so as to ensure that the pole can be reliably combined with the pole to form reliable electric connection.

Description

Battery cell

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery.

Background

When the bare cell tab and the electrode post contained in the square shell battery are electrically connected, the common practice is to separately set a positive electrode switching piece and a negative electrode switching piece on the tabs of the positive electrode and the negative electrode respectively, the positive electrode switching piece and the negative electrode switching piece are electrically connected with the tabs of the positive electrode and the negative electrode respectively first, then the positive electrode switching piece and the negative electrode switching piece are combined with the positive electrode and the negative electrode respectively again, and laser welding is carried out on the combined positions through laser welding equipment, and the welding is generally carried out from inside.

Disclosure of utility model

In view of the above drawbacks of the prior art, an object of the present utility model is to provide a battery, which can realize the combination of a tab and a post, and facilitate the welding operation of a welding device, so as to effectively reduce the actual production cost, reduce the production steps, and ensure the reliability of the electrical connection between the tab and the post.

To achieve the above and other related objects, the present utility model provides a battery comprising

A bare cell;

the battery cell shell is used for accommodating the bare battery cell;

the pole is arranged on the battery cell shell; and

The electrode lug is arranged on the bare cell, the battery further comprises a recombination zone, the recombination zone is arranged on the electrode post, at least part of the recombination zone extends from one surface of the electrode post far away from the electrode lug to the other surface, the electrode lug further comprises an extension section, and at least part of the extension section is combined with the electrode post to form a combination zone.

In an alternative embodiment of the utility model, at least part of the recombination zone extends through the pole.

In an alternative embodiment of the utility model, at least part of the tab is electrically connected to the pole via the bonding region.

In an alternative embodiment of the utility model, at least part of the tab is electrically connected to the recombination zone via the bonding zone.

In an alternative embodiment of the utility model, the bonding region further comprises a conductive bond, the bonding region being electrically connected to the pole by the conductive bond.

In an alternative embodiment of the utility model, the bonding region further comprises a conductive bond, the bonding region being electrically connected to the recombination region by the conductive bond.

In an alternative embodiment of the utility model, the conductive bond comprises an electrical connection pad disposed between the bond region and the recombination region.

In an alternative embodiment of the utility model, the conductive bond includes an auxiliary welding substance filled between the bond region and the recombination region.

In an alternative embodiment of the utility model, the bonding zone is at least partially below the recombination zone.

In an alternative embodiment of the utility model, the pole is provided with a recessed region, the bottom of which is provided with the recombination region.

In an alternative embodiment of the present utility model, a sealing nail is disposed on the pole and is disposed to cover the recombination region, the sealing nail cover is disposed at an opening position of the recess region, and an edge of the sealing nail is connected with an opening edge of the recess region.

In an alternative embodiment of the present utility model, at least two sets of the tab positions are included;

And at least partial areas of the two groups of lugs are overlapped to form the bonding area.

In an alternative embodiment of the utility model, the battery further comprises

And the supporting piece is arranged below the combining area.

In an optional embodiment of the present utility model, the battery cell casing further includes a cover, and the cover is provided with a blocking body, the blocking body extends toward the inner side of the battery cell casing, the cover is connected with other parts of the battery cell casing through a connection seam, and a vertical projection of the connection seam position toward the inside of the battery cell casing intersects with the blocking body.

By adopting the technical scheme, the beneficial technical effects of the utility model reside in that: the pole is provided with a recombination zone, a partial area of the recombination zone can extend towards one face of the pole lug, an extension section is also arranged on the pole lug, the extension section can extend to form a combination zone by combining with the pole lug, when welding equipment performs pole welding from the outside of the shell, the pole lug is provided with the recombination zone and is connected with the combination zone, so that the pole lug can be reliably combined with the pole lug to form reliable electric connection, and the battery with the structure has at least the following beneficial effects in actual use: 1) The extension section replaces the adapter piece, and the extension section on the tab is overlapped with the pole by extending the tab, so that redundant components and redundant production steps can be reduced, the production cost is reduced, the production efficiency is improved, and the connection reliability of the battery can be improved by reducing parts; 2) Because the extending section of the electrode lug and the electrode post have an overlapped part, and the extending section of the electrode lug has a thicker thickness, when the electrode lug is welded from the outside of the electrode post, the overlapped part can be prevented from being welded, and the damage to the internal structure of the battery cell shell can be prevented; 3) The electrode post is welded from the outside, and the electrode post and the electrode lug are electrically connected from the outside by forming a recombination zone, so that the influence of welding scraps and other impurities caused by internal welding on the inside of the shell can be reduced, and the use safety of the battery is improved; 4) The battery is characterized in that the cover body and the battery cell shell are welded firstly to ensure the sealing of the battery cell shell, and then the pole post and the pole lug are welded, so that the overall stability and safety of the battery can be improved, and the pollution influence on the battery in the manufacturing process is reduced; 5) When the cover body is welded with the battery cell shell, the baffle body is arranged on the cover body, so that the problem of light leakage generated during laser welding can be reduced, the damage to the bare battery cell is avoided, and the subsequent use safety of the battery is improved.

Drawings

FIG. 1 is a top view of a square battery according to one embodiment of the present utility model;

Fig. 2 is a front view of a die according to an embodiment of the utility model;

FIG. 3 is a top view of a two-set die attach in accordance with one embodiment of the present utility model;

Fig. 4 is a cross-sectional view of a square battery according to an embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of a combination of two groups of bare cells according to an embodiment of the utility model;

FIG. 6 is a cross-sectional view of a portion of a state of the combination of a bare cell, a cell housing and an electrode column according to an embodiment of the present utility model;

FIG. 7 is a cross-sectional view of a portion of another state of the combination of a bare cell, a cell housing and an electrode column according to an embodiment of the present utility model;

FIG. 8 is a cross-sectional view of a portion of a bare cell, a cell housing, an electrode column bond and a sealing nail according to an embodiment of the present utility model;

Fig. 9 is a cross-sectional view of a portion of a bare cell, a cell housing, and an electrode column combination according to another embodiment of the utility model.

Fig. 10 and 11 are sectional views showing two states of a combination of a battery cell casing and a cover according to another embodiment of the present utility model;

FIG. 12 is a cross-sectional view showing a portion of the structure of a battery cell housing and a cover combined in accordance with another embodiment of the present utility model;

Fig. 13 is a cross-sectional view showing a portion of a structure of a battery cell housing and a cover combined in accordance with another embodiment of the present utility model.

Description of the reference numerals:

A bare cell 10; a tab 11; an extension 12; a cell housing 20; a pole 21; recessed region 211; an insulator 22; a seal pin 23; a support 24; a cover 25; a blocking body 251; recombination zone a; a binding region b; an electric connection piece c; and a bonding gap d.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the illustrations, not according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

In the description herein, numerous specific details are provided, such as examples of components and/or methods, to provide a thorough understanding of embodiments of the utility model. One skilled in the relevant art will recognize, however, that an embodiment of the utility model can be practiced without one or more of the specific details, or with other apparatus, systems, components, methods, components, materials, parts, and so forth. In other instances, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the utility model.

Reference throughout this specification to "one embodiment," "an embodiment," or "a particular embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment, and not necessarily all embodiments, of the present utility model. Thus, the appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics of any specific embodiment of the present utility model may be combined in any suitable manner with one or more other embodiments. It will be appreciated that other variations and modifications of the embodiments of the utility model described and illustrated herein are possible in light of the teachings herein and are to be considered as part of the spirit and scope of the utility model.

It will also be appreciated that one or more of the elements shown in the figures may also be implemented in a more separated or integrated manner, or even removed because of inoperability in certain circumstances or provided because it may be useful depending on the particular application.

In addition, any labeled arrows in the drawings/figures should be considered only as exemplary, and not limiting, unless otherwise specifically indicated. Furthermore, the term "or" as used herein is generally intended to mean "and/or" unless specified otherwise. Combinations of parts or steps will also be considered as being noted where terminology is foreseen as rendering the ability to separate or combine is unclear.

As used in the description herein and throughout the claims that follow, unless otherwise indicated, "a", "an", and "the" include plural references. Also, as used in the description herein and throughout the claims that follow, unless otherwise indicated, the meaning of "in …" includes "in …" and "on …".

Referring to fig. 1, fig. 2, fig. 3, in the present utility model, a square-shell battery is taken as an example, the square-shell battery includes two groups of bare cells 10, the bare cells 10 are wound and laminated, and the bare cells 10 are formed by alternately overlapping a plurality of groups of positive plates and negative plates, referring to fig. 3, the positive plates and the negative plates are respectively provided with a tab 11 in an extending manner, the tabs 11 on the plurality of groups of positive plates and the negative plates are respectively combined into a group, and one end of the bare cells 10 is led out, the two groups of bare cells 10 are mutually attached, the tab 11 of the two groups of bare cells 10 is welded with the tab 11 through an ultrasonic welding device, the ultrasonic welding device is adopted again to weld the front and the back surfaces of the two groups of bare cells 10, and then the lamination is carried out, and as the projection of the tab 21 and the tab 11 in the length direction of the square-shell battery is deviated, the tab 11 is generally provided with a rotating tab 21, so as to realize the connection between the tab 11 and the tab 21, the tab 11 and the tab 21 is respectively, and the tab 11 is provided with a new tab 11, and the tab 11 is provided with a protection film 21, and the tab 21 is respectively arranged on the other surface of the tab 10, and the tab 20 is covered by at least one side of the tab 11, and the other side, the tab 20 is provided with a protection zone, which is covered by the tab 20, and the area is covered by the tab area.

In an embodiment, referring to fig. 5, the extension section 12 on the tab 11 can extend to be close to the pole 21, and the extension section 12 and the pole 21 are directly combined to form the combined area b, the pole 21 can be directly welded by a laser welding device, so that the recombination area a is formed on the pole 21, the extension end 12 of the tab 11 and the pole 21 form a whole, the stability of electric conduction between the tab 11 and the pole 21 is ensured, the tab can not be welded on the tab 11 alone, thus the production cost of the square-shell battery can be effectively reduced, and the welding of the pole 21 by the laser welding device is also more convenient to form the recombination area a, so that the two components are welded and fixed.

Referring to fig. 7, in some embodiments, at least a portion of the recombination zone a extends through the pole 21, and the triangular area shown in fig. 7 indicates that the laser welding head is capable of welding through the recombination zone a, which is actually formed by welding through a position on the pole 21 by a laser welding device, which is configured to weld through the pole 21 to form the recombination zone a adjacent to the extension 12 on the tab 11, such that the recombination zone a is welded integrally with the bonding zone b on the extension 12.

In some embodiments, at least a portion of the tab 11 is electrically connected to the pole 21 through the bonding region b.

Referring to fig. 6, in an embodiment, when the laser welding apparatus performs welding on the pole 21, the pole 21 is not welded through, the triangle in fig. 6 indicates that the laser welding area does not penetrate through the pole 21, and the recombination zone a formed on the pole 21 does not penetrate through the pole 21, so as to ensure that the tab 11 can form an electrical connection with the pole 21, and a partial area of the extension section 12 on the tab 11 is directly combined with the pole 21 through the combination zone b, so that at least part of the tab 11 and the pole 21 form an electrical connection.

In some embodiments, at least a portion of the tab 11 is electrically connected to the recombination zone a through the bonding zone b.

Referring to fig. 7, in an embodiment, when the laser welding apparatus performs welding on the pole 21, the pole 21 is welded through, the recombination region a formed on the pole 21 can penetrate through the pole 21, and the partial region of the extension section 12 on the tab 11 is directly combined with the recombination region a formed on the pole 21 through the combination region b, so that the recombination region a and the combination region b on the pole 21 form a reliable whole, and thus, the electrical connection between the tab 11 and the pole 21 can be ensured.

In an embodiment, the extension section 12 replaces the switching piece, and by extending the tab 11, the extension section 12 on the tab 11 overlaps the pole 21, so that redundant components and redundant production steps can be reduced, which is beneficial to reducing production cost, improving production efficiency, and reducing parts to improve connection reliability.

In an embodiment, since the extending section 12 of the tab 11 and the pole 21 have an overlapping portion, when welding from the outside of the pole 21, the overlapping portion can be prevented from being welded through, and damage to the internal structure of the cell housing 20, such as damage to the bare cell 10 caused by heat radiation of laser, can be avoided, and once the bare cell 10 is damaged, the use safety of the whole battery can be seriously affected.

In some embodiments, considering that the pole 21 is not soldered through, in order to ensure that the bonding area b can effectively form an electrical connection with the pole 21, the bonding area b further includes a conductive bonding portion, and the bonding area b is electrically connected with the pole 21 through the conductive bonding portion.

In some embodiments, referring to fig. 8, the conductive bond includes an electrical connection pad c disposed between the bonding region b and the recombination region a.

In some embodiments, the electrical connection piece c is made of a metal conductive material and is consistent with the materials of the pole 21 and the tab 11, and the material of the electrical connection piece c may not be consistent with the materials of the pole 21 or the tab 11, so that the electrical connection between the pole 21 and the tab 11 can be achieved through the electrical connection piece c.

In another embodiment, referring to fig. 6, the conductive bonding portion includes an auxiliary welding substance filled between the bonding area b and the recombination area a, it should be understood that the recombination area a does not actually penetrate the post 21, so that there is still a problem of unreliable electrical connection between the bonding area b and the post 21, flux is filled between the bonding area b and the post 21, when the laser welding apparatus welds the post 21, the recombination area a without penetrating the post 21 is formed above the post 21, and heat of the recombination area a is transferred to the bonding area b, so that the bonding area b and the post 21 are welded together by the auxiliary welding substance, so that the electrical connection stability between the post 21 and the tab 11 can be ensured. As a possible solution, the auxiliary welding substance may be some metal or alloy with a lower melting point.

In some embodiments, considering that the recombination zone a has penetrated the pole 21, to further ensure a more reliable electrical connection between the bonding zone b and the pole 21, said bonding zone b further comprises an electrically conductive bond, through which said bonding zone b is electrically connected to said recombination zone a.

Similarly, in some embodiments, the conductive bond includes an electrical connection tab c disposed between the bonding region b and the recombination region a.

Similarly, the electrical connection piece c is made of a metal conductive material and is consistent with any one of the pole 21 and the tab 11, and in some embodiments, the material of the electrical connection piece c is inconsistent with the material of the pole 21 or the tab 11, so that the electrical connection between the pole 21 and the tab 11 can be achieved through the electrical connection piece c.

Similarly, in another embodiment, the conductive bonding part includes a flux filled between the bonding region b and the recombination region a, and when the laser welding apparatus welds the pole 21, the recombination region a formed above the pole 21 penetrates the pole 21, and heat of the recombination region a is transferred to the bonding region b until the auxiliary welding material is melted, so that the bonding region b is connected with the pole 21, for example, in a melted connection state, to form a whole, so that electrical connection stability between the pole 21 and the tab 11 can be ensured.

In some embodiments, to ensure that there is an overlap area between the tab 11 and the post 21 when welded, so that the laser welding apparatus can weld the post 21 and the extension 12 on the tab 11 in one weld, the bonding area b is at least partially below the recombination area a.

In one embodiment, assuming that the laser welding head performs welding of the pole 21 vertically downward, in order to ensure that the focusing point of the laser welding head is located just above and below the bonding area b, it is required that the bonding area b is located just below the recombination area a, that is, the recombination area a can cover the bonding area b, and the focusing point of the laser welding head can be located between the bonding area b and the recombination area a, so that reliable welding between the bonding area b and the recombination area a can be ensured to be integrated.

In an embodiment, the electrode post 21 is welded from the outside, and the recombination region a is formed, so that the electrode post 21 and the electrode tab 11 are electrically connected from the outside, so that the influence of impurities such as welding scraps caused by internal welding on the inside of the battery cell casing 20 can be reduced, and the damage of impurities such as welding scraps on the bare cell 10 can be improved, thereby improving the use safety of the battery.

Referring to fig. 6 to 9, in some embodiments, the pole 21 is provided with a recess 211, and the bottom of the recess 211 is provided with the recombination zone a.

In an embodiment, the whole pole 21 is circular plate-shaped, when the pole 21 is installed with the cell casing 20, a circumferential clamping groove is formed at the edge of the pole 21, a through hole is formed on the cell casing 20, an insulator 22 is arranged at the edge of the through hole, the insulator 22 can effectively ensure insulation between the pole 21 and the cell casing 20, then the pole 21 is assembled on the insulator 22, the insulator 22 is clamped into the circumferential clamping groove at the edge along the pole 21, a concave area 211 is formed on the pole 21, the concave area 211 is a concave groove formed at one end of the insulator 22, the groove bottom of the concave area 211 forms a recombination area, when the extending section 12 of the lug 11 is welded with the pole 21, the concave groove 211 is positioned right below a laser welding head, and in some embodiments, the notch cross section of the concave groove 211 is circular, triangular, rectangular or abnormal-shaped.

In some embodiments, referring to fig. 8, after the welding of the pole 21 and the extension 12 of the tab 11, the recess 211 needs to be sealed, so the square-case battery further includes a sealing nail 23 disposed on the pole 21 and configured to cover the recombination zone a, the sealing nail 23 covers the opening of the recess 211, and the edge of the sealing nail 23 is connected with the opening edge of the recess 211.

In an embodiment, to ensure reliable sealing between the edge of the sealing pin 23 and the edge of the opening of the recessed area 211, a sealing rubber ring may be disposed on the edge of the sealing pin 23, and when the edge of the sealing pin 23 is combined with the edge of the opening of the recessed area 211, the sealing rubber ring is compressed to realize sealing connection between the sealing pin and the edge of the sealing pin.

In another embodiment, the edges of the sealing nail 23 and the opening edges of the recessed area 211 may be sealed by laser welding, and referring to fig. 8, triangular marks in the drawing are welding areas, so as to ensure the reliability of sealing the opening of the recessed area 211.

In a specific embodiment, referring to fig. 2, two groups of tabs 11 are respectively disposed on two groups of bare cells 10, and the two groups of tabs include two groups of positive tabs and two groups of negative tabs, and after the positive and negative tabs are attached together, at least partial areas of the two groups of tabs 11 are overlapped to form the bonding area b.

In an embodiment, referring to fig. 4, the overlapping section of the tab 11 on the bare cell 10 is the extension section 12, it can be understood that after the two tabs 11 are folded together, the upper end face of the overlapping section forms the bonding area b, and the bonding area b is located right below the recess 211, and the laser welding head of the laser welding device can weld through the bottom of the recess 211 until the bottom of the recess 211 is welded through, so that the bottom of the recess 211 and the upper end faces of the overlapping sections of the two tabs 11 are welded and fixed together.

In an embodiment, the two tabs 11 may be folded in half, the overlapping sections of the two tabs 11 may be arranged horizontally, and the overlapping sections of the two tabs 11 are attached in the up-down direction.

In an embodiment, the overlapped sections of the two tabs 11 are attached vertically, and the bonding surfaces of the overlapped sections of the two tabs 11 can be welded and fixed by an ultrasonic welding device.

In some embodiments, referring to fig. 4, to avoid deformation of the overlapped sections of the two tabs 11, a supporting member 24 is disposed below the bonding area b to support the overlapped sections of the two tabs 11.

In an embodiment, the supporting member 24 is made of a polymer material and includes a supporting plane, the supporting plane is located at a position below the overlapping section of the two tabs 11, and the supporting member 24 abuts against the two bare cells 10, so as to ensure reliable supporting of the overlapping section of the two tabs 11, when the overlapping sections of the two tabs 11 are welded together by the ultrasonic welding device, the supporting member 24 is inserted into a cavity enclosed between the overlapping section of the two tabs 11 and the two bare cells 10, so that the supporting plane on the supporting member 24 abuts against a position below the overlapping section of the two tabs 11, so that the overlapping section of the two tabs 11 is tightly attached to the upper pole 21, especially when the pole 21 is welded with the tab 11.

In the description of this embodiment, it is necessary to further explain the structure of the existing square-shell battery, the post of the existing square-shell battery is generally mounted on the end cover, after the end cover is combined with the battery cell shell, the combination gap between the end cover and the battery cell shell is welded, and when the focusing point of the laser welding head falls into the position of the combination gap between the end cover and the battery cell shell, the metal at the combination position of the end cover and the battery cell shell can be melted, so as to further realize the combination fixation of the end cover and the battery cell shell.

Referring to fig. 10 and 11, in some embodiments, the battery cell casing 20 further includes a cover 25, and the cover 25 is provided with a blocking body 251, the blocking body 251 extends toward the inside of the battery cell casing 20, the cover 25 is connected with other parts of the battery cell casing 20 through a connection seam d, and a vertical projection of the connection seam d toward the inside of the battery cell casing 20 intersects with the blocking body 251. The position of the connection seam d is understood here to be the position of the connection seam on the inner wall of the housing. The term perpendicular in the perpendicular projection is understood here to mean a direction perpendicular to the inner wall of the housing at the location of the connection joint d.

In an embodiment, in the vertical projection of the position of the connection seam d into the cell case 20, referring to the enlarged partial view in fig. 11, the connection seam d is located at the bottom position of the cell case 20, and the direction of the connection seam d into the cell case 20 (x direction in the drawing) is perpendicular to the vertical direction of the cell case 20 (y direction in the drawing), so that the vertical projection should be interpreted as the extending direction of the connection seam d (x direction in the drawing), and thus the connection seam d intersects with the stopper 251 in the x direction.

In an embodiment, when the cover 25 is welded to the battery cell casing 20, the blocking body 251 is disposed on the cover 25, and the blocking body 251 extends toward the inner side of the battery cell casing 20, and when the laser welding head performs focus welding on the connection seam d between the cover 25 and the battery cell casing 20, since the vertical projection of the connection seam d toward the inside of the battery cell casing 20 intersects with the blocking body 251, the blocking body 251 can effectively block the focus point of the laser welding head, so as to avoid damage to the bare cell 10 caused by heat radiation or impurities generated by the focus point of the laser welding head, such as splashed melt, and the like, so as to ensure the quality of the finally formed square-case battery.

In some embodiments, the blocking body 251 is an extension boss provided on the cover 25, and when the cover 25 is mounted with the opening of the cell casing 20, the extension boss extends to the inner side of the cell casing 20, so that the extension boss can be in a vertical projection position of the connection seam d into the cell casing 20, so as to implement blocking of the bonding seam d.

Referring to the enlarged partial view of fig. 12, in other embodiments, the blocking body 251 is an extending rib provided on the cover body 25, an annular gap for inserting the extending rib is provided on the inner wall of the opening of the cell housing 20, and when the cover body 25 is covered on the opening of the cell housing 20, the extending rib extends into the annular gap, so as to block the bonding gap d.

Referring to the enlarged partial view of fig. 13, in some embodiments, the blocking body 251 is also an extending rib provided on the cover body 25, an annular groove for inserting the extending rib is provided at the opening end surface of the cell housing 20, and when the cover body 25 is covered at the opening position of the cell housing 20, the extending tube extends into the annular groove, so as to block the bonding gap d.

When the square rechargeable battery is produced, the cover body 25 and the battery cell shell 20 are welded firstly, then the pole post 21 and the pole lug 11 are welded, the production mode is adopted, the welding efficiency can be effectively improved, the cover body 25 and the battery cell shell 20 of the battery are welded firstly, the sealing of the battery cell shell 20 is ensured, the overall stability and safety of the battery can be improved, and the pollution influence on the battery in the manufacturing process is reduced.

In a word, to the improvement of utmost point ear 11, utmost point post 21 for the utmost point ear 11 of naked electric core 10 can effectually realize being connected with the electricity of utmost point post 21, reduces the use of adapter piece, reducible actual production's process, reduction in production cost, and improve whole electric core casing 20, avoided "light leak" problem, weld through utmost point post 21 outside moreover, when guaranteeing utmost point ear 11 and utmost point post 21 welding reliability, can also effectively reduce the risk that the foreign matter got into electric core casing 20, promote battery safety.

The above description of illustrated embodiments of the utility model, including what is described in the abstract, is not intended to be exhaustive or to limit the utility model to the precise forms disclosed herein. Although specific embodiments of, and examples for, the utility model are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present utility model, as those skilled in the relevant art will recognize and appreciate. As noted, these modifications can be made to the present utility model in light of the foregoing description of illustrated embodiments of the present utility model and are to be included within the spirit and scope of the present utility model.

The systems and methods have been described herein in general terms as being helpful in understanding the details of the present utility model. Furthermore, various specific details have been set forth in order to provide a thorough understanding of embodiments of the utility model. One skilled in the relevant art will recognize, however, that an embodiment of the utility model can be practiced without one or more of the specific details, or with other apparatus, systems, assemblies, methods, components, materials, parts, and/or the like. In other instances, well-known structures, materials, and/or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the utility model.

Thus, although the utility model has been described herein with reference to particular embodiments thereof, a latitude of modification, various changes and substitutions are intended in the foregoing disclosures, and it will be appreciated that in some instances some features of the utility model will be employed without a corresponding use of other features without departing from the scope and spirit of the utility model as set forth. Therefore, many modifications may be made to adapt a particular situation or material to the essential scope and spirit of the present utility model. It is intended that the utility model not be limited to the particular terms used in following claims and/or to the particular embodiment disclosed as the best mode contemplated for carrying out this utility model, but that the utility model will include any and all embodiments and equivalents falling within the scope of the appended claims. Accordingly, the scope of the utility model should be determined only by the following claims.

Claims (14)

1. A battery includes

A bare cell;

the battery cell shell is used for accommodating the bare battery cell;

the pole is arranged on the battery cell shell; and

The electrode lug is arranged on the bare cell,

It is characterized in that the battery also comprises a recombination zone which is arranged on the pole, at least part of the recombination zone extends from one surface of the pole far away from the pole ear to the other surface,

The tab also comprises an extension section, and at least part of the extension section is combined with the pole to form a combined area.

2. The battery of claim 1, wherein at least a portion of the recombination zone extends through the post.

3. The battery of any one of claims 1 or2, wherein at least a portion of the tab is electrically connected to the post through the bonding region.

4. The battery of claim 2, wherein at least a portion of the tab is electrically connected to the recombination zone through the bonding zone.

5. The battery of claim 1, wherein the bond region further comprises a conductive bond, the bond region being electrically connected to the post through the conductive bond.

6. The battery of claim 2, wherein the bonding region further comprises a conductive bond, the bonding region being electrically connected to the recombination region by the conductive bond.

7. The battery of any one of claims 5 or 6, wherein the conductive bond includes an electrical connection tab disposed between the bond region and the recombination region.

8. The battery of any of claims 5 or 6, wherein the conductive bond includes an auxiliary welding substance filled between the bond region and the recombination region.

9. The battery of any one of claims 1 or 2, wherein the bonding zone is at least partially below the recombination zone.

10. The battery according to any one of claims 1 or 2, wherein the post is provided with a recessed region, the bottom of which is provided with the recombination region.

11. The battery of claim 10, further comprising a sealing spike disposed on the post and configured to cover the recombination zone, the sealing spike cover being disposed at an opening location of the recessed zone, and an edge of the sealing spike being connected with an opening edge of the recessed zone.

12. A battery according to any one of claim 1 or 2, wherein,

At least comprises two groups of tab positions;

And at least partial areas of the two groups of lugs are overlapped to form the bonding area.

13. The battery of claim 12, wherein the battery further comprises

And the supporting piece is arranged below the combining area.

14. The battery according to any one of claims 1 or 2, wherein the cell case further comprises a cover, and the cover is provided with a stopper extending toward the inside of the cell case, the cover is connected to the other part of the cell case by a connection joint, and a vertical projection of the connection joint position toward the inside of the cell case intersects the stopper.