CN215771307U

CN215771307U - Cylindrical battery

Info

Publication number: CN215771307U
Application number: CN202121480415.5U
Authority: CN
Inventors: 容亮斌; 潘秋; 焦奇方
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-02-08
Anticipated expiration: 2031-06-30

Abstract

The utility model relates to the field of batteries and discloses a cylindrical battery. This cylindrical battery includes the casing of open structure and sets up the inside utmost point core of casing, the open end of casing is equipped with the apron, the tip of utmost point core is equipped with the connection piece, the apron with connect through leading electrical pillar between the connection piece, the apron with be equipped with the supporting pad between the connection piece, the supporting pad cover is established lead the periphery of electrical pillar. According to the utility model, the conductive columns are arranged to connect the cover plate and the connecting sheet, and the supporting pad is arranged between the cover plate and the connecting sheet, so that an acting force towards the pole core direction is provided for the connecting sheet, when the battery shakes under external acting forces such as vibration, the pole core can be effectively prevented from moving in the axis direction, and a stabilizing effect is achieved; in addition, the supporting pad and lead the rigid contact that electric pillar can avoid between apron and the connection piece, the connection piece transmits the effort to the supporting pad and leads electric pillar, and then reduces the deformation of apron and connection piece, improves the reliability of connecting.

Description

Cylindrical battery

Technical Field

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

Background

The traditional cylindrical battery comprises a cylindrical shell, a pole core, an insulating sheet, an insulating tape, a sealing ring, a cap combination and the like. The two ends of the pole core are respectively provided with a positive pole lug and a negative pole lug, and the positive pole lug and the negative pole lug are both connected with connecting sheets. During installation, a manufactured pole core with a positive pole lug, a negative pole lug and a connecting sheet is usually arranged in a shell with an opening at one end, and a cap assembly with a connecting assembly is extruded at the opening end of the shell in a pier sealing mode to realize battery sealing. This kind of design makes connection piece and apron direct contact, and in the use, the battery is receiving under external forces such as vibrations, and the drunkenness appears in its axial direction easily for utmost point core, and utmost point core directly transmits the effort to connection piece and apron at the drunkenness in-process, causes the deformation of connection piece and apron easily, and then makes the battery break down.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems or at least partially solve the above technical problems, the present invention provides a cylindrical battery.

The utility model provides a cylindrical battery, which comprises a shell with an open structure and a pole core arranged in the shell, wherein a cover plate is arranged at the open end of the shell, a connecting sheet is arranged at the end part of the pole core, the cover plate is connected with the connecting sheet through a conductive column, a supporting pad is arranged between the cover plate and the connecting sheet, and the supporting pad is sleeved on the periphery of the conductive column.

Preferably, the connecting sheet is provided with a plurality of first avoidance holes, the first avoidance holes are opposite to the positions of the explosion-proof nicks arranged on the cover plate, and the support pad is provided with second avoidance holes corresponding to the first avoidance holes.

Preferably, a plurality of first avoidance holes are evenly arranged along the circumferential direction of the connecting sheet, and a plurality of second avoidance holes are evenly arranged along the circumferential direction of the supporting pad.

Preferably, the diameter of the support pad is smaller than or equal to the diameter of the connecting piece.

Preferably, the supporting pad is made of elastic materials.

Preferably, the supporting pad is made of an insulating material.

Preferably, the cover plate is provided with a liquid injection hole, and the position of the conductive column corresponding to the liquid injection hole is provided with a through hole.

Preferably, the conductive column is arranged on one side of the cover plate facing the connecting sheet, and the periphery of the contact surface of the conductive column and the connecting sheet forms a first welding position.

Preferably, the conductive column is arranged on one side, facing the cover plate, of the connecting sheet, and the periphery of the contact surface of the conductive column and the cover plate forms a second welding position.

Preferably, the conductive column comprises a first sleeve arranged on the connecting sheet and a second sleeve arranged on the cover plate, and the first sleeve is clamped on the inner wall or the periphery of the second sleeve.

Compared with the prior art, the technical scheme provided by the embodiment of the utility model has the following advantages:

according to the utility model, the conductive columns are arranged to connect the cover plate and the connecting sheet, and the supporting pad is arranged between the cover plate and the connecting sheet, so that an acting force towards the pole core direction is provided for the connecting sheet, when the battery shakes under external acting forces such as vibration, the pole core can be effectively prevented from moving in the axis direction, and a stabilizing effect is achieved; in addition, the supporting pad and lead the rigid contact that electric pillar can avoid between apron and the connection piece, the connection piece transmits the effort to the supporting pad and leads electric pillar, and then reduces the deformation of apron and connection piece, improves the reliability of connecting.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural view of a cylindrical battery according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a cylindrical battery according to an embodiment of the present invention;

fig. 3 is a schematic view of the conductive post disposed on the cover plate according to the embodiment of the present invention;

fig. 4 is a schematic view of the conductive post disposed on the connection pad according to the embodiment of the utility model;

fig. 5 is a schematic view of the conductive post according to the embodiment of the present invention including a first sleeve and a second sleeve;

FIG. 6 is a schematic structural view of a connecting piece according to an embodiment of the present invention;

fig. 7 is a schematic structural view of the support pad according to the embodiment of the present invention.

Description of the reference numerals

1. Connecting sheets; 12. a protrusion; 13. a groove; 2. a cover plate; 21. a liquid injection hole; 3. a conductive post; 31. a first sleeve; 32. a second sleeve; 33. a through hole; 4. a first welding position; 41. a second welding position; 5. a support pad; 51. opening a hole; 6. a first avoidance hole; 7. a second avoidance hole; 8. explosion-proof nicking; 9. a housing; 91. and (4) a pole core.

Detailed Description

In order that the above objects, features and advantages of the present invention may be more clearly understood, a solution of the present invention will be further described below. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein; it is to be understood that the embodiments described in the specification are only a part of the embodiments of the present invention, and not all of them.

Referring to fig. 1 to 5, the cylindrical battery according to the embodiment of the present invention includes a case 9 having an open structure and a pole piece 91 disposed inside the case 9, wherein the open end of the case 9 is provided with a cover plate 2 for sealing the case 9, and the end of the pole piece 91 is provided with a connecting piece 1, i.e., the connecting piece 1 is attached to the pole piece 91. The both ends of utmost point core 91 have anodal utmost point ear and negative pole utmost point ear respectively, all are equipped with connection piece 1 on anodal utmost point core 91 and the negative pole utmost point ear, and above-mentioned connection piece 1 is the connection piece 1 that sets up with apron 2 relatively to the utmost point ear of this connection piece 1 connection can be anodal utmost point ear also can be negative pole utmost point ear, and it depends on the assembly direction of utmost point core 91. Be connected through leading electrical pillar 3 between apron 2 and the connection piece 1, lead electrical pillar 3 along the axial direction setting of utmost point core 91, be equipped with supporting pad 5 between apron 2 and the connection piece 1, the middle part of supporting pad 5 is equipped with trompil 51 for supporting pad 5 cover is established in the periphery of leading electrical pillar 3, and the both sides of supporting pad 5 contact with apron 2 and connection piece 1 respectively. Further, the supporting pad 5 is made of an insulating material. Furthermore, the supporting pad 5 is made of an elastic material, i.e. the supporting pad 5 may be made of a rubber material. As shown in fig. 2 to 5, the diameter of the supporting pad 5 is smaller than or equal to the diameter of the connecting sheet 1, so as to avoid increasing additional occupied space.

According to the utility model, the conductive column 3 is arranged to connect the cover plate 2 and the connecting sheet 1, and the supporting pad 5 is arranged between the cover plate 2 and the connecting sheet 1, so that an acting force towards the pole core 91 is provided for the connecting sheet 1, when a battery shakes under external acting forces such as vibration, the pole core 91 can be effectively prevented from moving in the axis direction, and a stabilizing effect is achieved; in addition, supporting pad 5 and lead the rigid contact that electric pillar 3 can avoid between apron 2 and the connection piece 1, and connection piece 1 transmits the effort to supporting pad 5 and leads electric pillar 3, and then reduces the deformation of apron 2 and connection piece 1, improves the reliability of connecting.

Referring to fig. 6 and 7, the connecting sheet 1 is provided with a plurality of first avoiding holes 6, the first avoiding holes 6 are opposite to the positions of the explosion-proof nicks 8 formed on the cover plate 2, and the supporting pad 5 is provided with second avoiding holes 7 at positions corresponding to the first avoiding holes 6. When the internal pressure of cylindrical battery was greater than the set pressure, gas looped through first dodge hole 6 and the explosion-proof nick 8 of the 7 flow direction in second dodge hole, and explosion-proof nick 8 broke under the pressure effect, and then made the inside and the outside intercommunication of cylindrical battery, realized the pressure release. The specific shapes of the first avoidance hole 6 and the second avoidance hole 7 are not limited, and can be designed according to actual requirements. In addition, the anti-explosion nicks 8 are groove bodies arranged on the cover plate 2, so that the thickness of the cover plate 2 corresponding to the groove bodies is smaller than the thickness of the cover plate 2 at other positions, and the groove bodies can be broken under the action of pressure. Further, a plurality of first avoidance holes 6 are evenly arranged along the circumferential direction of the connecting sheet 1, and a plurality of second avoidance holes 7 are evenly arranged along the circumferential direction of the supporting pad 5. So that the pressure of the gas is uniformly applied at the location of the explosion-proof score 8 of the cover plate 2.

As shown in fig. 6, a plurality of grooves 13 are formed in a side of the connecting piece 1 away from the cover plate 2, and the grooves 13 can facilitate gas discharge and better electrolyte infiltration into the electrode core. Specifically, connection piece 1 is equipped with arch 12 towards one side of apron 2, and then keeps away from one side of apron 2 at arch 12 and forms recess 13, and during installation connection piece 1, can paste connection piece 1 in the one end of utmost point core 91, can form the passageway that supplies electrolyte to flow and gas flow between the inner wall of recess 13 and the terminal surface of utmost point core 91 like this, and then be favorable to the better infiltration utmost point core of electrolyte and gaseous discharge. In addition, the bending part of the tab is provided with tab protection glue, so that the effect of protecting the tab can be effectively achieved. The shapes of the groove 13 and the protrusion 12 are not limited, and only the normal installation of other parts is not influenced.

In addition, a liquid injection hole 21 is formed in the lid plate 2, and the liquid injection hole 21 is formed in the middle of the lid plate 2 and used for injecting electrolyte toward the inside of the battery. The position of the conductive post 3 corresponding to the liquid injection hole 21 should be provided with a through hole 33, and the connecting sheet 1 should also be provided with a through hole, and the through hole 33 should be opposite to the position of the liquid injection hole 21, so that the electrolyte can flow into the battery.

As shown in fig. 3, conductive column 3 is disposed on a side of cover plate 2 facing bond pad 1, and a first bonding site 4 is formed on an outer periphery of a contact surface of conductive column 3 and bond pad 1. During the installation, lead electrical pillar 3 and press to connection piece 1 to the periphery welding that will lead electrical pillar 3 and the contact surface of connection piece 1, and then realize

connection piece

1 and 2 being connected of apron, simple structure makes the junction more firm. Further, it makes progress electrically conductive 3 and apron 2 integrated into one piece, increases the joint strength who makes progress electrically conductive 3 and apron 2, simultaneously, reduces processing technology, and then increases production efficiency. Furthermore, the contact surface between the conductive column 3 and the connecting pad 1 is a plane, so that the contact area between the conductive column 3 and the connecting pad 1 is effectively increased, and the current transmission effect is ensured. In addition, a positioning hole can be formed in the connecting sheet 1, and the end of the conductive column 3 is inserted into the positioning hole, so that the conductive column 3 is positioned, and the accuracy of the welding position is ensured.

As shown in fig. 4, conductive column 3 is disposed on the side of connecting pad 1 facing cover plate 2, and the periphery of the contact surface between conductive column 3 and cover plate 2 forms second welding position 41. During the installation, apron 2 atress is pressed to leading electrical pillar 3 and connection piece 1 to the periphery welding that will lead electrical pillar 3 and apron 2's contact surface, and then realize connection piece 1 and apron 2's being connected, simple structure makes the junction more firm. Further, it is leading electrical pillar 3 and connection piece 1 integrated into one piece, and then increases the joint strength who leads electrical pillar 3 and connection piece 1, simultaneously, reduces processing technology, and then increases production efficiency. Furthermore, the contact surface between the conductive post 3 and the cover plate 2 is a plane, which effectively increases the contact area between the conductive post 3 and the cover plate 2 and ensures the current transmission effect. In a similar way, a positioning hole can be formed in the cover plate 2, and the end part of the conductive column 3 is inserted into the positioning hole, so that the conductive column 3 is positioned, and the accuracy of the welding position is ensured.

As shown in fig. 2 and 5, the conductive column 3 includes a first sleeve 31 disposed on the connecting sheet 1 and a second sleeve 32 disposed on the cover plate 2, and the first sleeve 31 is clamped on an inner wall or an outer periphery of the second sleeve 32. Further, the first sleeve 31 and the second sleeve 32 are in interference fit, so that the connection effect is ensured, and the stability in the use process is improved. Specifically, first sleeve 31 cover is established in the periphery of second sleeve 32, and when adopting this kind of design, the height of first sleeve 31 should be less than or equal to the height of second sleeve 32, avoids increasing the extra occupation space of connection piece 1, and can have the clearance between connection piece 1 and the apron 2, realize connection piece 1's fixed through being connected between first sleeve 31 and the second sleeve 32, and this kind of design, when supporting pad 5 adopted the elastic material, when first sleeve 31 had the trend towards the direction removal of second sleeve 32, accessible supporting pad 5 played the cushioning effect for the removal of first sleeve 31, avoided hard collision.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a cylindrical battery, its characterized in that is in including casing (9) and the setting of open structure casing (9) inside utmost point core (91), the open end of casing (9) is equipped with apron (2), the tip of utmost point core (91) is equipped with connection piece (1), apron (2) with connect through leading electrical pillar (3) between connection piece (1), apron (2) with be equipped with supporting pad (5) between connection piece (1), supporting pad (5) cover is established lead the periphery of electrical pillar (3).

2. The cylindrical battery according to claim 1, wherein the connecting sheet (1) is provided with a plurality of first avoidance holes (6), the first avoidance holes (6) are opposite to the positions of the explosion-proof nicks (8) provided on the cover plate (2), and the support pad (5) is provided with second avoidance holes (7) at positions corresponding to the first avoidance holes (6).

3. The cylindrical battery according to claim 2, wherein a plurality of the first avoidance holes (6) are uniformly arranged along the circumferential direction of the connection sheet (1), and a plurality of the second avoidance holes (7) are uniformly arranged along the circumferential direction of the support sheet (5).

4. The cylindrical battery according to claim 1, wherein the diameter of the support pad (5) is smaller than or equal to the diameter of the connection sheet (1).

5. The cylindrical battery according to claim 1, wherein the support pad (5) is made of an elastic material.

6. The cylindrical battery according to claim 1, wherein the support pad (5) is made of an insulating material.

7. The cylindrical battery according to claim 1, wherein the cover plate (2) is provided with a liquid injection hole (21), and the conductive column (3) is provided with a through hole (33) at a position corresponding to the liquid injection hole (21).

8. The cylindrical battery according to claim 1, wherein the conductive column (3) is arranged on the side of the cover plate (2) facing the connection plate (1), and the periphery of the contact surface of the conductive column (3) and the connection plate (1) forms a first welding position (4).

9. The cylindrical battery according to claim 1, wherein the conductive column (3) is arranged on the side of the connecting piece (1) facing the cover plate (2), and the periphery of the contact surface of the conductive column (3) and the cover plate (2) forms a second welding position (41).

10. The cylindrical battery according to claim 1, wherein the conductive post (3) comprises a first sleeve (31) provided on the connection tab (1) and a second sleeve (32) provided on the cap plate (2), the first sleeve (31) being snapped on an inner wall or outer periphery of the second sleeve (32).