CN219534820U - Battery cell - Google Patents

Abstract

The disclosure relates to the technical field of batteries, and discloses a battery; the battery comprises a pole and a battery shell, wherein the pole comprises a pole body and a flanging structure; the pole body is provided with a concave part; the turn-ups structure is connected in the one side that the utmost point post body was provided with the depressed part and fixes battery case, is provided with first through-hole on the turn-ups structure, and first through-hole sets up relatively with the depressed part, and the cross-sectional area of first through-hole is greater than the cross-sectional area of depressed part, and the thickness of turn-ups structure is less than the thickness of the lateral wall of depressed part. The battery has higher assembly efficiency and product yield.

Description

Battery cell

Technical Field

The disclosure relates to the technical field of batteries, and in particular relates to a battery.

Background

In order to maintain economic sustainable development and protect the environment and energy supply for human living, zero emission of batteries is the first choice as a new energy source.

However, the current battery has low assembly efficiency and low product yield.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure aims to overcome the above-mentioned disadvantages of the related art battery in terms of assembly efficiency and product yield, and to provide a battery having high assembly efficiency and product yield.

According to one aspect of the present disclosure, there is provided a battery including a terminal and a battery case, the terminal including:

the pole body is provided with a concave part;

the battery shell is provided with a first through hole, the first through hole is arranged opposite to the concave part, the cross section area of the first through hole is larger than that of the concave part, and the thickness of the flanging structure is smaller than that of the side wall of the concave part.

According to the battery disclosed by the disclosure, on one hand, the thickness of the flanging structure is smaller than that of the side wall of the concave part, so that the structural strength of the flanging structure is smaller than that of the side wall of the concave part. When the pole and the battery shell are riveted and assembled, the flanging structure with smaller structural strength is easier to bend, so that the riveting process can be conveniently carried out, the riveting efficiency and the riveting quality of the pole and the battery shell can be remarkably improved, and the assembly efficiency and the product yield of the whole battery can be improved.

On the other hand, through making the thickness of turn-ups structure be less than the thickness of depressed part lateral wall, and the cross-sectional area of first through-hole is greater than the cross-sectional area of depressed part can be after turn-ups structure buckles for the one end that turn-ups structure and depressed part lateral wall are connected provides the buffering surplus, can avoid the one end that turn-ups structure and depressed part lateral wall to be connected to produce stress concentration to can avoid turn-ups structure to take place cracked problem after buckling, further promoted the product yield of whole battery.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic top view of an example embodiment of a battery of the present disclosure.

Fig. 2 is a partial schematic structure view of section A-A of fig. 1 of an example embodiment of a battery of the present disclosure.

Fig. 3 is a partial schematic structure view of a section A-A of fig. 1 of another exemplary embodiment of a battery of the present disclosure.

Reference numerals illustrate:

1. a pole; 11. a pole body; 111. a recessed portion; 12. a flanging structure; 121. a first through hole; 122. a first face; 123. a second face; 1231. an edge region; 13. a top plate;

2. a battery case; 21. an accommodation space; 22. a top surface; 23. a side surface;

3. a collecting tray; 31. a positive current collecting section; 32. a negative current collector;

4. a first seal; 5. a first insulating member; 6. a second insulating member; 7. and a battery cell.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

The terms "a," "an," "the," "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and do not limit the number of their objects.

In the present utility model, unless explicitly specified and limited otherwise, the term "connected" is to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium. "and/or" is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

Since the battery is assembled, the pole 1 needs to be riveted with other structures of the battery (for example, the battery case 2, etc.). In addition, during caulking, a part of the structure of the pole 1 needs to be bent. However, the conventional pole 1 is not easily bent during caulking, and thus, the assembly efficiency and the product yield of the battery are low. Meanwhile, after the existing pole 1 is bent, the bending part has larger concentrated stress, so that the bending part is easy to break, and the product yield is further reduced, so that the battery is easy to damage in the use process.

In order to solve this technical problem, the present exemplary embodiment provides a battery, which includes a post 1 and a battery case 2, the post 1 including a post body 11 and a burring structure 12, as shown with reference to fig. 1 to 3; the pole body 11 is provided with a concave part 111; the flanging structure 12 is connected to the side, provided with the concave portion 111, of the pole body 11 and is used for fixing the battery shell 2, the flanging structure 12 is provided with a first through hole 121, the first through hole 121 is opposite to the concave portion 111, the cross section area of the first through hole 121 is larger than that of the concave portion 111, and the thickness of the flanging structure 12 is smaller than that of the side wall of the concave portion 111.

In the battery of the present disclosure, on the one hand, by making the thickness of the burring structure 12 smaller than the thickness of the side wall of the recess 111, the structural strength of the burring structure 12 can be made smaller than the structural strength of the side wall of the recess 111. When the pole 1 and the battery shell 2 are riveted and assembled, the flanging structure 12 with smaller structural strength is easier to bend, so that the riveting process can be facilitated, the riveting efficiency and the riveting quality of the pole 1 and the battery shell 2 can be remarkably improved, and the assembly efficiency and the product yield of the whole battery can be improved.

On the other hand, through making the thickness of turn-ups structure 12 be less than the thickness of depressed part 111 lateral wall, can be in the one side that pole body 11 is close to turn-ups structure 12 and form the step face to for turn-ups structure 12 and the one end that depressed part 111 lateral wall is connected provide the buffering surplus after turn-ups structure 12 buckles, can avoid turn-ups structure 12 and the one end that depressed part 111 lateral wall is connected to produce stress concentration, thereby can avoid turn-ups structure 12 to take place cracked problem after buckling, further promoted the product yield of whole battery.

The battery is exemplified below.

In the present exemplary embodiment, the battery may include a battery case 2, the battery case 2 may have an accommodating space 21, and a second through hole (not shown) may be provided in the battery case 2, and the above-described pole 1 may penetrate the second through hole. Specifically, when the battery is a cylindrical battery, the battery case 2 may be provided as a cylinder, that is, the battery case 2 may include a top surface 22 and a bottom surface (not shown in the drawings) that are disposed opposite to each other, the top surface 22 and the bottom surface may each be provided as a circle, and a side surface 23 may be connected between the top surface 22 and the bottom surface, and the side surface 23 may be provided as a cylinder. The side surfaces 23, the top surface 22 and the bottom surface surround the accommodation space 21 forming the battery case 2. A second through hole may be provided on the top surface 22, the second through hole may be provided as a circular through hole, and the second through hole may communicate to the accommodation space 21.

Of course, in other example embodiments of the present disclosure, the bottom and top surfaces 22 may be provided in a rectangular shape, an oval shape, a trapezoid shape, etc., and the side surfaces 23 may be provided in one or more and formed around the rectangular shape, the oval shape, the trapezoid shape, etc., such that the battery case 2 is formed in a rectangular shape, an oval cylindrical shape, a prismatic shape, etc. The battery case 2 may have other shapes, and is not described in detail herein. And the second through holes may also be provided as rectangular through holes, oval through holes, polygonal through holes, etc.

In the present exemplary embodiment, the side wall of the recess 111 may be a cylindrical solid structure, that is: the sidewall may enclose a recess 111. The cross-sectional shape of the side wall may be circular, rectangular, etc. When the cross-sectional shape of the side wall is a circular ring shape, the shape of the recess 111 may be a cylinder; when the cross-sectional shape of the side wall is a rectangular ring shape, the shape of the recess 111 may be prismatic.

The burring structure 12 may be connected with the face of the post body 11 provided with the recess 111 and fix the battery case 2, and the recess 111 may extend in the axial direction of the post body 11. It will be appreciated that the flange structure 12 may be a solid structure that is cylindrical prior to bending. Also, the cross-sectional shape of the burring structure 12 when not being bent may be the same as the cross-sectional shape of the side wall of the recess 111. When the cross-sectional shape of the side wall is a circular ring shape, the shape of the burring structure 12 may be a cylinder shape; when the cross-sectional shape of the side wall is a rectangular ring shape, the shape of the burring structure 12 may be a prismatic cylinder.

After the terminal 1 and the battery case 2 are assembled by the riveting process, the burring structure 12 may extend to a side away from the central axis of the recess 111, specifically: when the pole 1 and the battery case 2 are riveted, the flanging structure 12 can be forced, so that the flanging structure 12 is bent and fixed to one side far away from the central axis of the concave portion 111, and the pole 1 and the battery case 2 are fixedly connected.

In this example embodiment, the ratio of the thickness of the flange structure 12 to the thickness of the side wall of the recess 111 may be equal to or greater than 0.15, so as to prevent the problem that the connection area of the flange structure 12 and the side wall of the recess 111 is too small due to the too large difference between the thickness of the flange structure 12 and the thickness of the side wall of the recess 111, so that the connection strength between the flange structure 12 and the side wall of the recess 111 is not too small, and thus the problem that the connection of the flange structure 12 and the side wall of the recess 111 breaks when force is applied to the flange structure 12 during riveting can be prevented, thereby improving the product yield of the battery. Meanwhile, the structural strength of the flanging structure 12 can be guaranteed through the arrangement, and the flanging structure 12 and the battery shell 2 are guaranteed to have larger connection strength, so that the product yield of the battery is further improved.

Meanwhile, the ratio of the thickness of the flanging structure 12 to the thickness of the side wall of the concave portion 111 can be smaller than or equal to 0.7, so that the structure strength of the flanging structure 12 and the structural strength difference between the side walls of the concave portion 111 can be ensured, and the problem that the flanging structure 12 is difficult to bend due to too small structural strength difference is prevented. Meanwhile, the large structural strength difference can also prevent the problem that the junction of the flanging structure 12 and the side wall of the concave part 111 generates large concentrated stress after the flanging structure 12 is bent. Therefore, the product yield of the battery can be further improved through the thickness ratio.

In the present exemplary embodiment, the thickness of the burring structure 12 may be 0.3 mm or more. By such arrangement, the problem that the structural strength of the burring structure 12 is too low due to the too small thickness of the burring structure 12 can be prevented. Therefore, after the flanging structure 12 is bent and connected with the battery shell 2, the connection stability of the flanging structure 12 can be ensured, and the problem that the flanging structure 12 is broken in the process of vibration or movement of the battery to separate the pole 1 from the battery shell 2 is prevented.

Meanwhile, the thickness of the burring structure 12 may be 1 mm or less. By such arrangement, the problem of the structural strength of the burring structure 12 being too large due to the excessive thickness of the burring structure 12 can be prevented from occurring. Thereby, it is ensured that the flanging structure 12 can be bent more easily in the process of riveting.

The thickness of the sidewall of the recess 111 may be 0.8 mm or more and 1.5 mm or less. By the arrangement, the side wall of the concave part 111 can be ensured to have larger structural strength as far as possible on the premise that the ratio of the thickness of the flanging structure 12 to the thickness of the side wall of the concave part 111 is more than or equal to 0.15 and less than or equal to 0.7, and the side wall of the concave part 111 is prevented from being deformed in the process of fixedly connecting the pole 1 with the battery shell 2.

In the present exemplary embodiment, referring to fig. 1 to 3, the battery may be a cylindrical battery, the first through hole 121 may be disposed concentrically with the battery, and the first through hole 121 may be disposed concentrically with the recess 111. I.e. the central axis of the first through hole 121, the central axis of the battery and the central axis of the recess 111 may be collinear.

In the present exemplary embodiment, the post body 11 may penetrate the second through hole, and thus, the shape of the post body 11 may be adapted to the shape of the second through hole, for example, when the second through hole is provided as a circular through hole, the post body 11 may also be provided as a cylinder, that is: the side wall of the recess 111 is cylindrical at this time; when the second through hole is provided as a rectangular through hole, the pole body 11 may be provided as a rectangular prismatic cylinder, that is: the side wall of the recess 111 is rectangular ring-shaped at this time. Of course, the side walls of the pole body 11 and the recess 111 may be other shapes.

The above-mentioned burring structure 12 may be provided in the receiving space 21 so that the pole 1 and the battery case 2 can be fixedly connected through the burring structure 12. When the second through hole is provided on the top plate 13, the burring structure 12 may be located at a side of the top plate 13 near the accommodating space 21, so that the top plate 13 and the pole 1 can be fixed by using the burring structure 12.

The flange structure 12 may have oppositely disposed first and second faces 122, 123. Wherein the first face 122 may be closer to the battery case 2 than the second face 123, the first face 122 may be planar.

Referring to fig. 2-3, the pole 1 may further include a top plate 13, the top plate 13 may be connected with the pole body 11, and the top plate 13 may be located at a side of the pole body 11 facing away from the burring structure 12, the top plate 13 protruding from the pole body 11 in a radial direction of the pole body 11, and may be located outside the battery case 2. Since the flanging structure 12 is disposed in the battery case 2, the top plate 13 is disposed outside the battery case 2, so that the battery case 2 can be limited in the radial direction of the pole body 11 through the flanging structure 12 and the top plate 13 to fix the pole 1 and the battery case 2.

The orthographic projection area of the top plate 13 on the reference surface can be larger than that of the flanging structure 12 on the reference surface, so that welding between the top plate 13 and the bus bar can be facilitated, the overcurrent area of current can be increased, and the output current of the battery can be increased.

In the present exemplary embodiment, as shown with reference to fig. 2 to 3, the battery may further include a first insulating member 5, and the first insulating member 5 may be provided in a ring-shaped plate shape. The first insulating member 5 may be provided at least between the first face 122 and the battery case 2. Since the first face 122 of the flange structure 12 is a plane, the first face 122 can be closely attached to the face of the first insulating member 5 close to the flange structure 12, so that a good sealing effect between the first face 122 and the first insulating member 5 can be ensured.

Referring to fig. 2 and 3, the battery may further include a first sealing member 4. The first sealing member 4 may be disposed at least between the first face 122 and the battery case 2 to seal and isolate the battery from the battery interior and the battery exterior, so as to avoid outflow of electrolyte in the battery, and also prevent impurities such as water vapor and the like outside the battery from entering the accommodating space 21, thereby avoiding damage to the battery caused by external impurities.

Referring to fig. 2, the first seal 4 may be located between the top plate 13 and the battery case 2. In this case, the first insulating member 5 may be located between the post body 11 and the battery case 2, and may be attached to the post body 11, thereby enabling insulation between the post body 11 and the battery case 2.

Referring to fig. 3, the first seal 4 may also be located between the first face 122 and the top face 22 and closely conform to the face of the first face 122 adjacent the flange structure 12. Because the first surface 122 of the flanging structure 12 is a plane, the first surface 122 and the first sealing element 4 are closely attached to one surface close to the flanging structure 12, so that a good sealing effect between the first surface 122 and the first sealing element 4 can be ensured, electrolyte outflow is further avoided, and impurities such as external water vapor and the like are prevented from entering the accommodating space 21.

Referring to fig. 3, the first insulating member 5 may further be located on a side of the first sealing member 4 facing away from the pole body 11, that is, the first insulating member 5 is far away from the pole body 11 relative to the first sealing member 4, so that the first insulating member 5 can protect the first sealing member 4, and avoid the first sealing member 4 from directly contacting with the electrolyte, so that corrosion of the electrolyte to the first sealing member 4 is avoided, the service life of the first sealing member 4 is prolonged, and the sealing effect of the first sealing member 4 can be ensured.

The thickness of the first insulating part 5 can be smaller than or equal to the thickness of the first sealing part 4, so that the first sealing part 4 can be extruded during installation, the outer peripheral surface of the first sealing part 4 can be tightly attached to the flanging structure 12 and the battery shell 2, the sealing effect of the first sealing part 4 is guaranteed, electrolyte outflow is avoided, impurities such as external water vapor and the like are prevented from entering the battery, and damage to the battery is avoided.

In the present exemplary embodiment, referring to fig. 2 to 3, the inner annular surface of the first sealing member 4 may abut against the post body 11, so that it is ensured that the electrolyte and the external impurities do not pass between the first sealing member 4 and the post body 11, and the sealing effect of the first sealing member 4 may be further improved.

The first sealing member 4 may be a sealing ring, and the material of the first sealing member 4 may be rubber, but is not limited thereto, and the first sealing member 4 may be other structural members or may also be made of other materials.

In the present exemplary embodiment, as shown with reference to fig. 2 to 3, the battery may further include a current collecting tray 3; the current collecting plate 3 can be located the turn-ups structure 12 and deviate from the one side of utmost point post body 11, and the current collecting plate 3 can be laminated with the at least part of the second face 123 of turn-ups structure 12 to the at least part of the second face 123 of turn-ups structure 12 sets up to the plane, thereby can make the second face 123 be the face contact when being connected with current collecting plate 3, increased the connection area of second face 123 and current collecting plate 3, just also can increase the connection stability between second face 123 and the current collecting plate 3.

The collecting tray 3 may include a positive collecting portion 31 and a negative collecting portion 32, wherein the second face 123 may be bonded to the positive collecting portion 31, that is: the positive current collector 31 is connected to the electrode tab 1 such that the electrode tab 1 is the positive electrode of the battery, and the negative current collector 32 is not connected to the electrode tab 1.

The first insulating member 5 may be further located between the battery case 2 and the current collecting plate 3, and may be respectively attached to the battery case 2 and the current collecting plate 3, so as to insulate the battery case 2 and the current collecting plate 3, thereby preventing the problem of electrical conduction between the battery case 2 and the current collecting plate 3. Meanwhile, the first insulating member 5 can also support the battery case 2 to increase the structural strength of the battery case 2.

In the present exemplary embodiment, as shown with reference to fig. 2 to 3, the distance between the edge region 1231 of the second face 123 and the first face 122 may decrease as the distance from the central axis of the first through hole 121 increases. The edge region 1231 may occupy 1/4 to 1/3 of the entire second face 123, but is not limited thereto.

Referring to fig. 2-3, the battery may further include a second insulating member 6, and the second insulating member 6 may be positioned between the top plate 13 and the battery case 2 to insulate between the top plate 13 and the battery case 2. The thickness of the second insulating member 6 can be smaller than or equal to the thickness of the first sealing member 4, so that the first sealing member 4 can be extruded when the first sealing member 4 is installed, the outer peripheral surface of the first sealing member 4 can be tightly attached to the top plate 13 and the battery shell 2, the sealing effect of the first sealing member 4 is guaranteed, electrolyte outflow is avoided, impurities such as external water vapor and the like are prevented from entering the battery, and damage to the battery is avoided.

Referring to fig. 2, the second insulating member 6 may be located on a side of the first sealing member 4 away from the pole body 11, that is, the second insulating member 6 is far away from the pole body 11 relative to the first sealing member 4, so that the second insulating member 6 can protect the first sealing member 4, avoid external moisture and other impurities from directly contacting with the first sealing member 4, avoid corrosion of the first sealing member 4 caused by moisture and other impurities, further prolong the service life of the first sealing member 4, and ensure the sealing effect of the first sealing member 4.

In the present exemplary embodiment, referring to fig. 2 to 3, the battery may further include a battery cell 7, the battery cell 7 may be disposed in the receiving space 21 of the battery case 2, and the battery cell 7 may be disposed as a cylinder adapted to the battery case 2. The battery cell 7 may include a plurality of positive electrode sheets and a plurality of negative electrode sheets, and a separator disposed between the plurality of positive electrode sheets and the plurality of negative electrode sheets.

The battery may further include a positive tab and a negative tab. The positive electrode tab may be connected to the battery cell 7, specifically, the positive electrode tab may be connected to the positive electrode sheet; the positive tab may be located on the side of the cell 7 near the pole 1, i.e. the positive tab may be located on the side of the cell 7 near the top surface 22. The negative electrode tab is connected to the cell 7, specifically, the negative electrode tab may be connected to the negative electrode sheet; and the negative electrode lug and the positive electrode lug can be positioned on two opposite sides of the battery cell 7, namely, the negative electrode lug can be positioned on one side of the battery cell 7 away from the pole 1. Of course, the negative tab and the positive tab may be located on the same side of the cell 7, i.e. the negative tab may be located on the side of the cell 7 close to the pole 1, or the negative tab may be located on the side of the cell 7 close to the top surface 22.

The positive electrode lug can be connected to the current collecting disc 3 so that the electrode post 1 is the positive electrode of the battery; the negative electrode tab may be connected to the battery case 2 such that the battery case 2 forms the negative electrode of the battery. When the current collecting tray 3 has the positive current collecting portion 31 and the negative current collecting portion 32, the positive tab may be connected to the positive current collecting portion 31, the negative tab may be connected to the negative current collecting portion 32, and the negative current collecting portion 32 may be connected to the battery case 2. Of course, the post 1 may be the negative electrode of the battery, and the battery case 2 may be the positive electrode of the battery.

The battery may be a single battery, or may be a battery module or a battery pack. It should be noted that, in the case that the battery is a battery module or a battery pack, the battery includes other necessary components and compositions besides the above-mentioned battery, such as a battery box, a circuit board, a control component, and the like, and those skilled in the art can correspondingly supplement the battery according to specific usage requirements of the battery device, which is not described herein again.

The terms "parallel" and "perpendicular" as used herein are not intended to be entirely parallel, perpendicular, but rather are subject to certain errors; for example, the included angle between the two is greater than or equal to 0 ° and less than or equal to 5 °, i.e. the two are considered to be parallel to each other; the included angle between the two is more than or equal to 85 degrees and less than or equal to 95 degrees, namely the two are considered to be mutually perpendicular.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (11)

1. A battery comprising a post and a battery housing, the post comprising:

the pole body is provided with a concave part;

the battery shell is provided with a first through hole, the first through hole is arranged opposite to the concave part, the cross section area of the first through hole is larger than that of the concave part, and the thickness of the flanging structure is smaller than that of the side wall of the concave part.

2. The battery according to claim 1, wherein a ratio of a thickness of the burring structure to a thickness of a side wall of the recess is 0.15 or more and 0.7 or less.

3. The battery of claim 1, wherein the thickness of the flange structure is 0.3 mm or more and 1 mm or less.

4. The battery of claim 1, wherein the sidewall of the recess has a thickness of 0.8 mm or more and 1.5 mm or less.

5. The battery according to claim 1, wherein the battery case has an accommodating space, a second through hole is provided in the battery case, the post body penetrates through the second through hole, and the flanging structure is provided in the accommodating space.

6. The battery of claim 5, wherein the flange structure has oppositely disposed first and second faces, the first face being closer to the battery housing than the second face, the first face being disposed as a planar surface.

7. The battery of claim 6, wherein the battery further comprises:

the current collecting disc is arranged on one side, deviating from the pole body, of the flanging structure, at least part of the second surface is arranged to be a plane, and the current collecting disc is attached to at least part of the second surface.

8. The battery of claim 7, wherein a distance between an edge region of the second face and the first face decreases with increasing distance from a central axis of the first through hole.

9. The battery of claim 6, wherein the post further comprises:

the top plate is connected to the pole body and is positioned on one side, deviating from the flanging structure, of the pole body, the top plate protrudes out of the pole body in the radial direction of the pole body, and the top plate is positioned outside the battery shell.

10. The battery of claim 9, wherein an orthographic projection area of the top plate on a reference plane is greater than an orthographic projection area of the flange structure on the reference plane, the reference plane being parallel to the first plane.

11. The battery according to any one of claims 1 to 10, wherein the battery is a cylindrical battery, the first through hole is disposed coaxially with the battery, and the first through hole is disposed coaxially with the recess.