CN219067010U

CN219067010U - Battery monomer and battery pack

Info

Publication number: CN219067010U
Application number: CN202223370561.XU
Authority: CN
Inventors: 辛雪倩
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-05-23
Anticipated expiration: 2032-12-14

Abstract

The utility model discloses a battery monomer and a battery pack, wherein the battery monomer comprises: a housing having a mounting through hole and a through hole peripheral wall surrounding the mounting through hole; a pole penetrating through the mounting through hole; the sealing washer is established on the utmost point post to the sealing washer snare, and the sealing washer includes: the sealing ring comprises a sealing ring body and a matching part which extends outwards along the radial direction of the sealing ring from the outer peripheral surface of the sealing ring body, wherein a first anti-falling part is arranged on the matching part; the sealing piece is clamped between the matching part and the inner wall surface of the shell, and a second anti-falling part matched with the first anti-falling part is arranged on the sealing piece. According to the utility model, the stability of the sealing ring is improved, the sealing failure is avoided, and the safety is improved through the cooperation of the first anti-falling part and the second anti-falling part.

Description

Battery monomer and battery pack

Technical Field

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

Background

In the related art, the battery cell cover plate mainly comprises pole body, sealing washer, lower plastic, aluminum sheet, last plastic, riveting piece, explosion-proof valve etc. mainly through the interference riveting cooperation of sealing washer and lower plastic, aluminum sheet, last plastic, realize sealed insulating effect. However, in the actual production process, the sealing ring is often assembled in a misplacement manner due to the reasons of insufficient machining precision, inaccurate positioning, swelling deformation of the sealing ring and the like of the parts, the compression amount of the sealing ring is insufficient, and the electrolyte enters the sealing ring to cause short circuit.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a battery monomer, which improves the stability of the sealing ring, avoids sealing failure and improves the safety.

The utility model also provides a battery pack applying the battery monomer, and safety is improved.

According to an embodiment of the present utility model, a battery cell includes: a housing having a mounting through hole and a through hole peripheral wall surrounding the mounting through hole; the pole is penetrated through the mounting through hole; the sealing ring is sleeved on the pole, and the sealing ring comprises: the sealing ring comprises a sealing ring body and a matching part which extends outwards from the outer peripheral surface of the sealing ring body along the radial direction of the sealing ring, wherein a first anti-falling part is arranged on the matching part; the sealing piece is clamped between the matching part and the inner wall surface of the shell, and a second anti-falling part matched with the first anti-falling part is arranged on the sealing piece.

According to the battery monomer provided by the embodiment of the utility model, the stability of the sealing ring is improved, the sealing failure is avoided, and the safety is improved through the cooperation of the first anti-falling part and the second anti-falling part.

In some embodiments, the first and second anti-slip portions are disposed on opposite inner surfaces of the mating portion and the seal, respectively.

In some embodiments, the first anti-slip portion is configured as a first anti-slip protrusion and the second anti-slip portion is configured as a second anti-slip protrusion.

In some embodiments, the first and second anti-drop protrusions are each multiple and arranged in a zigzag shape.

In some embodiments, the spacing between two adjacent first anti-drop protrusions is smaller than the spacing between two adjacent second anti-drop protrusions.

In some embodiments, the width of the first anti-falling protrusion is 0.05-0.1mm, and the interval between two adjacent first anti-falling protrusions is 0.07-0.15mm; the width of the second anti-falling protrusions is 0.05-0.07mm, and the distance between two adjacent second anti-falling protrusions is 0.1-0.15mm.

In some embodiments, the seal ring further comprises: the boss is arranged on the outer peripheral surface of the sealing ring body, the outer peripheral surface of the sealing ring body is spaced from the peripheral wall of the through hole to form a gap, and the boss stretches into the gap.

In some embodiments, the boss has a thickness of 0.15-0.25mm and a height of 0.3-0.5mm.

In some embodiments, the boss is annular and integrally formed on the outer peripheral surface of the seal ring body.

The battery pack according to the embodiment of the utility model comprises the battery cells.

According to the battery pack provided by the embodiment of the utility model, the safety is improved by applying the battery cell.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a partial view of a battery cell according to an embodiment of the present utility model.

Reference numerals:

100. a battery cell;

10. a housing; 11. mounting through holes; 12. a through hole peripheral wall;

20. a pole; 30. a seal ring; 31. a seal ring body; 32. a mating portion; 321. a first anti-drop portion; 33. a boss;

40. a seal; 41. a second anti-drop portion; 50. applying plastic; 60. and riveting the blocks.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly, for distinguishing between the descriptive features, and not sequentially, and not lightly.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The battery cell 100 according to the embodiment of the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1, according to a battery cell 100 of an embodiment of the present utility model, the battery cell 100 includes: housing 10, post 20, seal ring 30, and seal 40.

The housing 10 has a mounting through hole 11 and a through hole peripheral wall 12 surrounding the mounting through hole 11. The post 20 is provided with a mounting through hole 11. The sealing washer 30 cover is established on utmost point post 20, and sealing washer 30 includes: the sealing ring comprises a sealing ring body 31 and a matching part 32 extending outwards along the radial direction of the sealing ring 30 from the outer peripheral surface of the sealing ring body 31, wherein a first anti-falling part 321 is arranged on the matching part 32.

The seal 40 is interposed between the engaging portion 32 and the inner wall surface of the housing 10, and a second retaining portion 41 engaged with the first retaining portion 321 is provided on the seal 40.

The sealing member 40 between the mating portion 32 and the inner wall surface of the housing 10 is always in a stable state under the clamping of the mating portion 32 and the housing 10, and the first anti-falling portion 321 and the second anti-falling portion 41 are mated, so that the sealing ring 30 always maintains a fixed shape, and under the dual sealing of the sealing ring 30 and the sealing member 40, the electrolyte in the housing 10 is blocked outside the sealing ring 30 and the sealing member 40, thereby improving the sealing performance.

According to the battery cell 100 of the embodiment of the utility model, the stability of the sealing ring 30 is improved, the sealing failure is avoided, and the safety is improved through the cooperation of the first anti-falling part 321 and the second anti-falling part 41.

In some embodiments, the first and second

anti-drop portions

321 and 41 are disposed at opposite inner surfaces of the mating portion 32 and the seal 40, respectively. The sealability is improved by providing the first and second drop-out preventing

portions

321 and 41 on opposite inner surfaces of the engaging portion 32 and the seal 40, respectively, that is, the first and second drop-out preventing

portions

321 and 41 are engaged face to face.

In some embodiments, the first drop-out prevention portion 321 is configured as a first drop-out prevention protrusion and the second drop-out prevention portion 41 is configured as a second drop-out prevention protrusion. The first anti-falling protrusion and the second anti-falling protrusion are clamped with each other, and the sealing ring 30 is subjected to the force of the sealing member 40, so that the fixed form is always maintained, and the tightness is maintained.

In some embodiments, the first anti-disengagement protrusions and the second anti-disengagement protrusions are all multiple and arranged in a zigzag shape. Through the cooperation of a plurality of first anticreep archs of cockscomb structure and a plurality of second anticreep archs of cockscomb structure, a plurality of first anticreep archs and a plurality of second anticreep protruding lock overlap joint in proper order, further improve the stability of sealing washer 30.

In some embodiments, the spacing between two adjacent first anti-slip projections is less than the spacing between two adjacent second anti-slip projections. Through the setting that two adjacent first anticreep bellied intervals are less than two adjacent second anticreep bellied intervals for a plurality of first anticreep bellies and the better lock of a plurality of second anticreep bellies improve the leakproofness.

In some embodiments, the width of the first anti-drop protrusions is 0.05-0.1mm, and the spacing between two adjacent first anti-drop protrusions is 0.07-0.15mm. The width of the second anti-falling protrusions is 0.05-0.07mm, and the distance between two adjacent second anti-falling protrusions is 0.1-0.15mm. That is, the first anti-falling protrusions are inserted between two adjacent second anti-falling protrusions, and the second anti-falling protrusions are inserted between two adjacent first anti-falling protrusions, so that the plurality of first anti-falling protrusions and the plurality of second anti-falling protrusions are buckled with each other, and the sealing performance is improved.

In some embodiments, the seal ring 30 further comprises: the boss 33, the boss 33 is provided on the outer peripheral surface of the seal ring body 31, and the outer peripheral surface of the seal ring body 31 is spaced apart from the through hole peripheral wall 12 and forms a gap into which the boss 33 protrudes. The strength of the sealing ring 30 is increased by arranging the boss 33, so that the problem of compressive deformation caused by insufficient strength of the sealing ring 30 is avoided, and the tightness is further improved.

In some embodiments, the thickness of the boss 33 is 0.15-0.25mm and the height of the boss 33 is 0.3-0.5mm.

For example, the thickness of the boss 33 is 0.15mm; alternatively, the thickness of the boss 33 may also be 0.17mm; alternatively, the thickness of the boss 33 may also be 0.20mm; alternatively, the thickness of the boss 33 may also be 0.22mm; alternatively, the thickness of the boss 33 may also be 0.25mm. The height of the boss 33 may be 0.3mm; alternatively, the height of the boss 33 may also be 0.35mm; alternatively, the height of the boss 33 may also be 0.40mm; alternatively, the height of the boss 33 may also be 0.45mm; alternatively, the height of the boss 33 may also be 0.50mm. Of course, the thickness of the boss 33 may be any other value within the range of 0.15-0.25mm, and the height of the boss 33 may be any other value within the range of 0.3-0.5mm, which will not be described here.

In some embodiments, the boss 33 is annular and integrally formed on the outer peripheral surface of the seal ring body 31. By providing the boss 33 as an annular shape formed on the outer peripheral surface of the seal ring body 31, the range in which the boss 33 increases the strength effect is increased, thereby increasing the sealing effect of the seal ring 30.

In some embodiments, the sealing member 40 comprises a lower plastic, the housing 10 comprises a polished aluminum sheet, the pole 20 is further provided with an upper plastic 50 and a riveting block 60, and the sealing ring 30 is in interference fit with the upper plastic 50, the lower plastic and the polished aluminum sheet, so as to improve the tightness.

In some embodiments, the lower plastic, the aluminum sheet, the upper plastic 50 and the riveting block 60 are assembled on the pole 20 in sequence, and after being connected in a riveting manner, the joint between the pole 20 and the riveting block 60 is sealed for the second time by laser welding, so that the design strength and the tightness requirements of the cover plate pole 20 are met. In the riveting extrusion process, the sealing ring 30 is in interference fit with the lower plastic, extrusion residues are filled in the reserved gaps to form a first layer of seal, and the sealing ring is mainly used for preventing the problem that the internal electrolyte invades to cause short circuit between the pole 20 and the cover plate; the sealing ring 30 is in interference fit with the aluminum sheet, and the extruded excess material is filled in the reserved joint to form a second layer of seal; the sealing ring 30 is in interference fit with the upper plastic 50, and the extrusion excess material is filled in the reserved joint to form a third layer of sealing, so that electrolyte is prevented from entering from the joint between the aluminum sheet and the upper plastic 50, and the pole 20 and the aluminum sheet are conducted and short-circuited.

The battery pack according to the embodiment of the utility model includes the above-described battery cell 100.

According to the battery pack of the embodiment of the utility model, the safety is improved by applying the above battery cell 100.

Other constructions and operations of the battery cell 100 according to the embodiment of the present utility model are known to those of ordinary skill in the art, and will not be described in detail herein.

In the description herein, reference to the term "embodiment," "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery cell (100), characterized by comprising:

a housing (10), the housing (10) having a mounting through hole (11) and a through hole peripheral wall (12) surrounding the mounting through hole (11);

a pole (20), wherein the pole (20) penetrates through the mounting through hole (11);

the sealing ring (30), sealing ring (30) cover is established on utmost point post (20), sealing ring (30) include: a seal ring body (31) and a matching part (32) extending outwards along the radial direction of the seal ring (30) from the outer peripheral surface of the seal ring body (31), wherein a first anti-falling part (321) is arranged on the matching part (32);

and a seal member (40), wherein the seal member (40) is sandwiched between the engagement portion (32) and the inner wall surface of the housing (10), and a second anti-disengagement portion (41) engaged with the first anti-disengagement portion (321) is provided on the seal member (40).

2. The battery cell (100) of claim 1, wherein the first and second anti-slip portions (321, 41) are disposed at opposite inner surfaces of the mating portion (32) and the sealing member (40), respectively.

3. The battery cell (100) of claim 1, wherein the first anti-slip portion (321) is configured as a first anti-slip protrusion and the second anti-slip portion (41) is configured as a second anti-slip protrusion.

4. The battery cell (100) of claim 3, wherein the first and second anti-disengagement protrusions are each a plurality of and arranged in a zigzag pattern.

5. The battery cell (100) of claim 4, wherein a spacing between adjacent two of the first anti-slip projections is less than a spacing between adjacent two of the second anti-slip projections.

6. The battery cell (100) according to claim 4 or 5, wherein the width of the first anti-drop protrusion is 0.05-0.1mm, and the interval between two adjacent first anti-drop protrusions is 0.07-0.15mm; the width of the second anti-falling protrusions is 0.05-0.07mm, and the distance between two adjacent second anti-falling protrusions is 0.1-0.15mm.

7. The battery cell (100) of claim 1, wherein the seal ring (30) further comprises: the boss (33) is arranged on the outer peripheral surface of the sealing ring body (31), the outer peripheral surface of the sealing ring body (31) is spaced from the through hole peripheral wall (12) and forms a gap, and the boss (33) stretches into the gap.

8. The battery cell (100) of claim 7, wherein the thickness of the boss (33) is 0.15-0.25mm and the height of the boss (33) is 0.3-0.5mm.

9. The battery cell (100) according to claim 7, wherein the boss (33) is annular and integrally formed on the outer peripheral surface of the seal ring body (31).

10. A battery pack characterized by comprising a battery cell (100) according to any one of claims 1-9.