Adapter piece and cylindrical battery

Abstract

The utility model discloses an adapter piece and a cylindrical battery, and relates to the technical field of batteries. Comprising an adapter piece main body and a plastic plate, the plastic plate is arranged on the adapter piece main body, the plastic plate is provided with a guide edge perpendicular to the length direction of the adapter piece main body, and the plastic plate is used for guiding the adapter piece main body to be bent at the position of the guide edge of the plastic plate so as to control the bending crease position of the adapter piece; the cylindrical battery comprises a shell, a battery cell, an end cover and an adapter plate, a lower plastic component is arranged on the surface, facing the battery cell, of the end cover, a concave accommodating groove is formed in the lower plastic component, an electrode on the end cover extends into the accommodating groove, and the accommodating groove is used for accommodating the folded adapter plate. According to the adapter piece and the cylindrical battery, the plastic plate is arranged on the adapter piece body, and the adapter piece body is guided to be bent at the position of the guide edge of the plastic plate, so that the position of a bending crease is effectively controlled, and the adapter piece can completely sink into the accommodating groove after being bent, so that the end cover is convenient to close.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a switching piece and cylindrical battery. BACKGROUND

[0002] The switching piece is one of important components of the battery, which is mainly used for connecting the pole lug of the battery core and the pole column of the battery end cover. In the finished battery, limited by the length size of the switching piece, the switching piece is usually in the form of folding in the groove of the lower plastic component of the battery end cover, at this time, the upper part of the switching piece is connected with the pole column on the battery end cover by welding, and the lower part is connected with the pole lug of the battery core by welding.

[0003] However, the switching piece will face the problem of uncontrollable folding crease in the folding process. Since the folding crease of the switching piece cannot be controlled, when the bending crease is inclined, the switching piece cannot be completely overlapped when being bent and folded, so that the edge part of the switching piece will be exposed to both sides, the width of the folding part of the switching piece will be increased, which leads to that the switching piece cannot be completely sunk into the groove of the lower plastic component, but extends to the outside of the groove of the lower plastic component, at this time, the folding part of the switching piece will also be spaced between the battery core and the end cover, which increases the distance between the battery core and the end cover, leading to the difficulty of closing the end cover. SUMMARY

[0004] The utility model discloses a switching piece and cylindrical battery, by setting up the plastic plate on the switching piece body, and guiding the switching piece body to bend at the position of the guide edge of the plastic plate, the folding crease position is effectively controlled, the switching piece is completely overlapped after bending, to solve the above technical problem.

[0005] The technical scheme for solving the above problems is to provide a switching piece for connecting the electrode and the pole lug of the battery core, comprising a switching piece body and a plastic plate, the plastic plate is arranged on the switching piece body, the plastic plate has a guide edge perpendicular to the length direction of the switching piece body, and the plastic plate is used for guiding the switching piece body to bend at the position of the guide edge of the plastic plate, so as to control the folding crease position of the switching piece.

[0006] Further, the switching piece body is arranged in the plastic plate.

[0007] Further, the switching piece body is arranged in the plastic plate.

[0008] Further, the plastic plate comprises a first plate body and a second plate body, the first plate body and the second plate body are oppositely arranged on both sides of the switching piece body, and the plug column is connected and arranged between the first plate body and the second plate body.

[0009] Further, the adapter piece body is further provided with a plurality of through holes, and the plurality of through holes are equidistantly distributed along a direction perpendicular to a length direction of the adapter piece body.

[0010] Further, the plurality of through holes are located outside the guide edge of the plastic plate.

[0011] Further, the plastic plate is further provided with an identification code.

[0012] Further, the mounting hole is provided with at least two.

[0013] Further, two sides of the first plate body are fixedly connected with two sides of the second plate body, so that the plastic plate forms a sleeve structure sleeved on the adapter piece body, and the plastic plate is prevented from falling off from the adapter piece body when the plug post is broken due to extrusion.

[0014] The utility model further provides a cylindrical battery, including casing, electric core, end cover and the adapter piece of any one end described above, the electric core is located in the casing, is equipped with the lower plastic subassembly on the face of end cover to the electric core, is formed with the concave accommodation groove on the lower plastic subassembly, the electrode on the end cover extends to the accommodation groove, the accommodation groove is used to accommodate the adapter piece after folding.

[0015] Further, the cross section of the folded adapter piece is S-shaped.

[0016] Further, the plastic plate is further used for supporting in the folded adapter piece to prevent the adapter piece from being excessively folded and broken.

[0017] The utility model has the advantages of:

[0018] 1, when the cylindrical battery appears short circuit, the adapter piece can be fused at the position arranged with a plurality of through holes, to enhance the safety of cylindrical battery.

[0019] 2, the adapter piece can be folded at the guide edge position of the plastic plate, and the through hole arranged on the adapter piece and located outside the guide edge of the plastic plate can also form a weak structure area of the adapter piece, to further facilitate the folding of the adapter piece at the edge of the plastic plate, to effectively control the folding crease position of the adapter piece, and avoid the problem that the adapter piece cannot be overlapped after folding.

[0020] 3, the plastic plate can also support at the overlapping gap of the adapter piece, to further prevent the adapter piece from being further extruded and broken at the bending position. DRAWINGS

[0021] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application. In the drawings:

[0022] Figure 1 Structure diagram of the adapter piece of the embodiment;

[0023] Figure 2 Structure diagram of the adapter piece body of the embodiment;

[0024] Figure 3 Sectional view of the plastic plate of the embodiment;

[0025] Figure 4 Structure sectional view of the end position of the cylindrical battery of the embodiment;

[0026] 1-adapter piece body, 11-mounting hole, 12-through hole;

[0027] 2-plastic plate, 21-first plate body, 22-second plate body, 23-inserting column;

[0028] 3-identification code;

[0029] 4-housing, 5-electric core, 6-end cover, 61-lower plastic component, 62-receiving groove, 7-adapter piece, 8-electrode. DETAILED DESCRIPTION

[0030] In the present specification, the orientation terms such as up, down, left, right, front, back, front face, back face, top, bottom, etc. mentioned or possibly mentioned are defined relative to the configuration shown in the drawings, and the words "inner" and "outer" refer to the direction towards or away from the geometric center of a particular component, which are relative concepts, so it is possible that they will change accordingly according to different positions, different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0031] Referring to Figures 1 to 3 The adapter piece of the embodiment is used for connecting the electrode 8 and the tab of the electric core 5; the adapter piece comprises an adapter piece body 1 and a plastic plate 2, the plastic plate 2 is arranged on the adapter piece body 1, the plastic plate 2 has a guide edge perpendicular to the length direction of the adapter piece body 1, and the plastic plate 2 is used for guiding the adapter piece body 1 to be bent at the position of the guide edge of the plastic plate 2, so as to control the bending crease position of the adapter piece.

[0032] Specifically, referring toFigure 1 and Figure 2 ,by Figure 1 Taking the direction shown as an example; the adapter body 1 includes a large metal surface that is conducive to full contact with the tab of the battery cell 5, and a metal strip extending from the large surface, and the end of the metal strip is used to be welded to the electrode 8. There is usually a gap reserved between the end cover 6 of the battery and the end face of the battery cell 5 for loading the large metal surface. The part of the adapter body 1 to be folded is the metal strip, and since the metal strip is thicker after bending, it is usually confined in the accommodating groove 62 of the lower plastic component 61 of the end cover 6.

[0033] Also, see Figure 1 and Figure 3 ,by Figure 1 Taking the shown orientation as an example, in this embodiment, the plastic plate 2 includes a first plate body 21 and a second plate body 22, four plug posts 23 are connected between the first plate body 21 and the second plate body 22, and four mounting holes 11 are opened at predetermined positions on the metal strip of the adapter body 1. The first plate body 21 and the second plate body 22 are further clamped and fixed on both sides of the predetermined position on the metal strip of the adapter body 1 by inserting the four plug posts 23 therebetween into the four mounting holes 11 respectively.

[0034] In this way, when bending the metal strip of the adapter plate main body 1, the left and right edges of the first plate body 21 and the left and right edges of the second plate body 22 are all guiding edges. The metal strip of the adapter plate main body 1 can be bent upward along the left edge or right edge of the first plate body 21, or it can be bent downward along the left edge or right edge of the second plate body 22. The crease of the metal strip of the adapter plate main body 1 will remain flush with the guiding edge of the plastic plate 2 to ensure that the metal strip of the adapter plate main body 1 remains overlapping after being bent and folded.

[0035] Moreover, the first plate body 21 and the second plate body 22 are connected to each other as a whole, further making the plastic plate 2 a sleeve structure that is sleeved on the regular metal strip of the adapter body 1, so that when the plug 23 inside the plastic plate 2 is squeezed and broken, the plastic plate 2 can still be clamped on the metal strip of the adapter body 1 through its sleeve structure.

[0036] In addition, an identification code 3 is provided on the upper surface of the first plate 21. The identification code 3 is a QR code in this embodiment. The identification code 3 records the batch information of the end cap 6 of the cylindrical battery where the adapter is located. Technicians can trace the source of the end cap 6 based on the identification code 3 to facilitate later traceability.

[0037] It should be noted that in other embodiments, the first plate body 21 and the second plate body 22 can also be separate plate bodies, connected only by the insertion column 23, and only by the insertion column 23 to be limited on both sides of the metal strip of the adapter piece main body 1, and the technician can enhance the strength and toughness of the insertion column 23 to improve the anti-fracture performance of the insertion column 23, thereby preventing the first plate body 21 and the second plate body 22 from falling off the metal strip.

[0038] In addition, the electrode in the present embodiment can be a positive pole column, or a negative pole substrate or a negative pole column. The number of insertion columns 23 can also be two, three, five or even more, and the number of mounting holes 11 corresponds to the number of insertion columns 23.

[0039] Further, please refer to Figure 1 and Figure 2 The adapter piece main body 1 is also provided with a plurality of through holes 12, which are distributed at equal intervals along the direction perpendicular to the line connecting the two ends of the adapter piece main body 1, and further form two rows of through holes 12 distributed on the outer sides of the edges of the left and right ends of the plastic plate 2. These two rows of through holes 12 can reduce the strength of the adapter piece main body 1 at the edges of the plastic plate 2, making it easier to bend the adapter piece main body 1 at the edges of the plastic plate 2, so as to further control the bending crease position of the adapter piece main body 1.

[0040] Moreover, due to the existence of these two rows of through holes 12, the cross-sectional area of the adapter piece main body 1 at its bending position is much smaller than other areas, and the technician can specially design the size of the through hole 12, thereby designing the melting current of the adapter piece main body 1, so that when the battery external connection is short-circuited, the adapter piece main body 1 will preferentially melt at the position of these two rows of through holes 12, so as to avoid the battery short-circuit from exploding or even exploding.

[0041] Please refer to Figure 4 A cylindrical battery of the present embodiment includes a shell 4, an electrode core 5, an end cover 6, and the adapter piece 7 described in any of the above paragraphs. The electrode core 5 is arranged in the shell 4, and the lower plastic assembly 61 is arranged on the surface of the end cover 6 facing the electrode core 5. The lower plastic assembly 61 has an inner recessed accommodation groove 62 formed thereon, and the electrode 8 on the end cover 6 extends into the accommodation groove 62. The accommodation groove 62 is used to accommodate the folded adapter piece 7.

[0042] Specifically, the metal surface of the adapter piece 7 is attached to the upper end surface of the electrode core 5 downward, so as to fully contact and be welded to the tab at the upper end surface of the electrode core 5. The metal strip of the adapter piece 7 is bent on both sides and forms an S-shaped folding structure under the support of the plastic plate 2, and the upper end of the metal strip is welded to the lower end of the electrode 8.

[0043] At this time, the plastic plate 2 is supported inside the folded metal strip to avoid the problem of the metal strip being broken at the crease position thereof when the end cover 6 is pressed against the metal strip while being folded onto the upper end of the shell 4.

[0044] The above-mentioned items are not mentioned in the prior art.

[0045] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limiting. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A tab for connecting an electrode (8) with a tab of a battery cell (5), characterized in that, The adapter plate body (1) is provided with a plastic plate (2) which is arranged on the adapter plate body (1) and has a guide edge which is perpendicular to the length direction of the adapter plate body (1) and is used to guide the bending of the adapter plate body (1) at the position of the guide edge of the plastic plate (2) to control the bending crease position of the adapter plate.

2. The adapter plate of claim 1, wherein, The adapter plate body (1) is arranged in the plastic plate (2).

3. The adapter plate of claim 1, wherein, The adapter plate body (1) is provided with a mounting hole (11), and the plastic plate (2) is provided with a plug column (23), and the plastic plate (2) is mounted on the adapter plate body (1) by inserting the plug column (23) into the mounting hole (11).

4. The adapter plate of claim 3, wherein, The plastic plate (2) comprises a first plate body (21) and a second plate body (22), and the first plate body (21) and the second plate body (22) are arranged on the two sides of the adapter plate body (1) respectively, and the plug column (23) is connected and arranged between the first plate body (21) and the second plate body (22).

5. The adapter plate of claim 1, wherein, The adapter plate body (1) is further provided with a plurality of through holes (12), and the plurality of through holes (12) are equidistantly distributed along the length direction perpendicular to the adapter plate body (1).

6. The adapter plate of claim 5, wherein, The plurality of through holes (12) are located outside the guide edge of the plastic plate (2).

7. The adapter plate of claim 1, wherein, The plastic plate (2) is further provided with an identification code (3).

8. A cylindrical battery, characterized by The adapter plate (7) comprises a shell (4), an electric core (5), an end cover (6), and the adapter plate (7) of any one of claims 1-7, the electric core (5) is arranged in the shell (4), the lower plastic assembly (61) is arranged on the surface of the end cover (6) which faces the electric core (5), the concave accommodating groove (62) is formed on the lower plastic assembly (61), the electrode (8) on the end cover (6) extends into the accommodating groove (62), and the accommodating groove (62) is used to accommodate the folded adapter plate (7).

9. The cylindrical battery of claim 8, wherein the positive electrode is a lithium cobalt oxide electrode. The cross section of the folded adapter plate (7) is S-shaped.

10. The cylindrical battery of claim 9, wherein the positive electrode is a lithium cobalt oxide electrode. The plastic plate (2) is further used to support in the folded adapter plate (7) to avoid the fracture of the adapter plate (7) caused by excessive folding.

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