阅读说明：本技术 一种电池密封结构及电池 (Battery sealing structure and battery ) 是由 朱乐 李吉栋 李跃飞 徐悦斌 何巍 于 2021-08-13 设计创作，主要内容包括：本发明公开了一种电池密封结构及电池,其属于密封技术领域,电池密封结构包括电池外壳、密封件和导电连接块,电池外壳包括外壳体和上盖板,外壳体的顶端具有阶梯面,上盖板固定连接于阶梯面处,外壳体的内部形成电池腔体,电解液位于电池腔体内,上盖板上设有上下贯穿的第一通孔；密封件设置于第一通孔处,密封件与第一通孔的内周面抵接,密封件上设有上下贯穿的第二通孔；导电连接块设置于第二通孔处,导电连接块与第二通孔的内周面抵接,极柱固定于导电连接块内。电池密封结构外壳体的镀层不易脱落,安全性高,密封性好。本发明提出了一种电池,通过上述电池密封结构进行密封。(The invention discloses a battery sealing structure and a battery, belonging to the technical field of sealing, wherein the battery sealing structure comprises a battery shell, a sealing element and a conductive connecting block, the battery shell comprises a shell body and an upper cover plate, the top end of the shell body is provided with a step surface, the upper cover plate is fixedly connected to the step surface, a battery cavity is formed inside the shell body, electrolyte is positioned in the battery cavity, and the upper cover plate is provided with a first through hole which penetrates up and down; the sealing element is arranged at the first through hole and is abutted against the inner circumferential surface of the first through hole, and the sealing element is provided with a second through hole which penetrates up and down; the conductive connecting block is arranged at the second through hole, the conductive connecting block is abutted against the inner circumferential surface of the second through hole, and the pole is fixed in the conductive connecting block. The cladding material of battery seal structure shell body is difficult for droing, and the security is high, and the leakproofness is good. The invention provides a battery, which is sealed by the battery sealing structure.)

1. A battery sealing structure, comprising:

the battery shell (1) comprises a shell body (11) and an upper cover plate (12), wherein the top end of the shell body (11) is provided with a step surface, the upper cover plate (12) is fixedly connected to the step surface, a battery cavity is formed inside the shell body (11), electrolyte is located in the battery cavity, and a first through hole which penetrates through the upper cover plate and the lower cover plate is formed in the upper cover plate (12);

the sealing element (2) is arranged at the first through hole, the sealing element (2) is abutted against the inner circumferential surface of the first through hole, and a second through hole which penetrates through the sealing element (2) vertically is formed;

and the conductive connecting block (3) is arranged at the second through hole, the conductive connecting block (3) is abutted to the inner circumferential surface of the second through hole, and the pole (10) is fixed in the conductive connecting block (3).

2. The battery sealing structure according to claim 1, wherein the sealing member (2) comprises a vertical sealing portion (21) and a horizontal sealing portion (22), an outer circumferential surface of the vertical sealing portion (21) abuts against an inner circumferential surface of the first through hole, the horizontal sealing portion (22) is fixedly connected to one end of the vertical sealing portion (21) away from the battery cavity, and the horizontal sealing portion (22) abuts against an end surface of the upper cover plate (12) away from the battery cavity.

3. The battery sealing structure according to claim 2, wherein the conductive connection block (3) comprises a connection body (31) and a crimping block (32), the outer circumferential surface of the connection body (31) abuts against the inner circumferential surface of the second through hole, the crimping block (32) is fixedly connected to one end of the connection body (31) away from the battery cavity, and the crimping block (32) abuts against the end surface of the horizontal sealing part (22) away from the battery cavity.

4. The battery sealing structure according to claim 2, wherein a protrusion (121) is annularly arranged around the first through hole at one end of the upper cover plate (12) far away from the battery cavity, the horizontal sealing part (22) abuts against an end face of the protrusion (121) far away from the battery cavity, and an outer peripheral surface of the vertical sealing part (21) abuts against an inner peripheral surface of the protrusion (121).

5. The battery sealing structure according to claim 1, wherein the outer housing (11) comprises a first annular body (111) and a second annular body (112) which are integrally formed, the first annular body (111) and the second annular body (112) are coaxial, the inner diameter of the second annular body (112) is larger than that of the first annular body (111), and the upper end face of the second annular body (112), the inner circumferential face of the second annular body (112), the upper end face of the first annular body (111) and the inner circumferential face of the first annular body (111) are sequentially connected to form the stepped face.

6. The battery sealing structure according to claim 5, wherein the upper cover plate (12) includes an upper plate (122) and a lower plate (123) which are integrally formed, the upper plate (122) and the lower plate (123) are coaxial, a lower end surface of the upper plate (122) is fixedly connected to an upper end surface of the second torus (112), and an outer circumferential surface of the lower plate (123) is fixedly connected to an inner circumferential surface of the second torus (112).

7. The battery sealing structure according to claim 6, further comprising an insulating sheet (4), wherein the insulating sheet (4) is located in the battery cavity, the upper end surface of the insulating sheet (4) is abutted to the lower end surface of the lower plate (123), the sealing member (2) and the conductive connecting block (3), the lower end surface of the insulating sheet (4) is abutted to the battery connecting plate (20), and the pole column (10) penetrates through the insulating sheet (4) and is fixedly connected to the upper end surface of the battery connecting plate (20).

8. The battery sealing structure according to claim 7, wherein an outer peripheral surface of the insulating sheet (4) abuts against an inner peripheral surface of the second torus (112), an upper end surface of the insulating sheet (4) abuts against a lower end surface of the lower plate (123), and a lower end surface of the insulating sheet (4) abuts against an upper end surface of the first torus (111).

9. The battery sealing structure according to claim 7, wherein the lower end surface of the lower plate (123) is fixedly connected to the upper end surface of the first torus (111), and the outer circumferential surface of the insulating sheet (4) is spaced from the inner circumferential surface of the outer case (11).

10. A battery comprising the battery sealing structure of any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of sealing, in particular to a battery sealing structure and a battery.

Background

The sealing structure is widely applied to production, the electrolyte of the cylindrical battery is located inside the steel shell, and the electric performance abnormity such as electric core cycle life deterioration caused by electrolyte loss is avoided by sealing the electric core.

Fig. 1 is a conventional cylindrical battery sealing structure, a sealing ring 1 'is in a bent shape, the sealing ring 1' wraps an explosion-proof sheet 2 'and a top cover 3', the top end of a shell 4 'is matched with the shape of the sealing ring 1' to realize sealing, namely, a rolling groove preprocessing is required to be performed on a position A of the shell 4 ', and a position B of the shell 4' is sealed and processed after all structures are installed, so that a sealing effect is realized.

The part of the shell that carries out the slot rolling preprocessing easily causes the cladding material of shell to drop, has weeping and the risk of rustting, and the security is low, and the leakproofness is poor.

Disclosure of Invention

The invention aims to provide a battery sealing structure and a battery, and aims to solve the technical problems of low safety and poor sealing performance caused by easy falling of a plating layer of a shell in the prior art.

As the conception, the technical scheme adopted by the invention is as follows:

a battery sealing structure comprising:

the battery shell comprises a shell body and an upper cover plate, wherein the top end of the shell body is provided with a step surface, the upper cover plate is fixedly connected to the step surface, a battery cavity is formed inside the shell body, electrolyte is positioned in the battery cavity, and the upper cover plate is provided with a first through hole which penetrates through the upper cover plate from top to bottom;

the sealing element is arranged at the first through hole and is abutted against the inner circumferential surface of the first through hole, and a second through hole which penetrates through the sealing element up and down is formed in the sealing element;

and the conductive connecting block is arranged at the position of the second through hole and is abutted against the inner peripheral surface of the second through hole, and the pole is fixed in the conductive connecting block.

Further, the sealing element comprises a vertical sealing part and a horizontal sealing part, the horizontal sealing part is fixedly connected to one end, far away from the battery cavity, of the vertical sealing part, the outer peripheral surface of the vertical sealing part is abutted to the inner peripheral surface of the first through hole, and the horizontal sealing part is abutted to the end face, far away from the battery cavity, of the upper cover plate.

Furthermore, the conductive connecting block comprises a connecting body and a pressure connecting block, the outer peripheral surface of the connecting body is abutted to the inner peripheral surface of the second through hole, the pressure connecting block is fixedly connected to one end, far away from the battery cavity, of the connecting body, and the pressure connecting block is abutted to the end face, far away from the battery cavity, of the horizontal sealing part.

Furthermore, one end, far away from the battery cavity, of the upper cover plate is provided with a protruding portion around the first through hole, the horizontal sealing portion is abutted to the end face, far away from the battery cavity, of the protruding portion, and the outer peripheral face of the vertical sealing portion is abutted to the inner peripheral face of the protruding portion.

Further, the shell body includes integrated into one piece's first tourus and second tourus, first tourus with the second tourus is coaxial, the internal diameter of second tourus is greater than the internal diameter of first tourus, the up end of second tourus, the inner peripheral surface of second tourus, the up end of first tourus and the inner peripheral surface of first tourus connect gradually and form the ladder surface.

Furthermore, the upper cover plate comprises an upper plate and a lower plate which are integrally formed, the upper plate and the lower plate are coaxial, the lower end face of the upper plate is fixedly connected with the upper end face of the second annular body, and the outer peripheral face of the lower plate is fixedly connected with the inner peripheral face of the second annular body.

Further, the battery sealing structure further comprises an insulating sheet, the insulating sheet is located in the battery cavity, the upper end face of the insulating sheet is connected with the lower plate, the sealing piece and the abutting joint of the conductive connecting block, the lower end face of the insulating sheet is abutted against the battery connecting sheet, and the pole column penetrates into the insulating sheet and is fixedly connected with the upper end face of the battery connecting sheet.

Furthermore, the outer peripheral surface of the insulating sheet abuts against the inner peripheral surface of the second annular body, the upper end surface of the insulating sheet abuts against the lower end surface of the lower plate, and the lower end surface of the insulating sheet abuts against the upper end surface of the first annular body.

Furthermore, the lower end face of the lower plate is fixedly connected with the upper end face of the first annular body, and the outer peripheral face of the insulating sheet and the inner peripheral face of the outer shell are arranged at intervals.

A battery comprising a battery sealing structure as described above.

The invention has the beneficial effects that:

the invention provides a battery sealing structure, which is characterized in that the outer shell and an upper cover plate are sealed by fixedly connecting the upper cover plate and a step surface at the top end of the outer shell, the step surface realizes the sealing in the transverse direction and the longitudinal direction, a sealing element realizes the sealing of the inner peripheral surface of a first through hole, a conductive connecting block is used for realizing the connection of a plurality of batteries, the inner peripheral surface of a second through hole of the sealing element realizes the sealing of the conductive connecting block, and the sealing performance is good. The battery sealing structure provided by the invention does not need to perform rolling groove preprocessing, the coating of the outer shell is not easy to fall off, the safety is high, and the sealing performance is good. The invention provides a battery, which is sealed through a battery sealing structure and has high safety.

Drawings

FIG. 1 is a prior art cylindrical battery seal structure;

fig. 2 is a sectional view of a battery sealing structure provided in accordance with an embodiment of the present invention;

fig. 3 is a cross-sectional view of a seal of a battery sealing structure provided in accordance with an embodiment of the present invention;

fig. 4 is a cross-sectional view of a conductive connection block of a battery sealing structure according to an embodiment of the present invention;

FIG. 5 is an enlarged view at C in FIG. 2;

fig. 6 is a plan view of a battery sealing structure provided in accordance with an embodiment of the present invention;

fig. 7 is a sectional view of a battery sealing structure provided in the second embodiment of the present invention;

fig. 8 is an enlarged view at D in fig. 7.

In the figure:

10. a pole column; 20. a battery connecting sheet;

1. a battery case; 11. an outer housing; 111. a first torus; 112. a second torus; 12. an upper cover plate; 121. a boss portion; 122. an upper plate; 123. a lower plate;

2. a seal member; 21. a vertical seal portion; 22. a horizontal sealing part;

3. a conductive connecting block; 31. a connecting body; 32. a crimping block;

4. an insulating sheet.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Example one

The embodiment of the invention provides a battery which is used for providing electric energy. The battery includes a battery sealing structure for sealing the battery.

Referring to fig. 2 to 6, the battery sealing structure includes a battery case 1, a sealing member 2 and a conductive connecting block 3, the battery case 1 includes a case body 11 and an upper cover plate 12, the top end of the case body 11 has a stepped surface, the upper cover plate 12 is fixedly connected to the stepped surface, a battery cavity is formed inside the case body 11, an electrolyte is located in the battery cavity, and the upper cover plate 12 is provided with a first through hole penetrating up and down; the sealing element 2 is arranged at the first through hole, the sealing element 2 is abutted against the inner circumferential surface of the first through hole, and the sealing element 2 is provided with a second through hole which penetrates up and down; the conductive connecting block 3 is arranged at the second through hole, the conductive connecting block 3 is abutted against the inner circumferential surface of the second through hole, and the pole 10 is fixed in the conductive connecting block 3.

Fixed connection through the top ladder face of upper cover plate 12 and shell body 11 carries out shell body 11 and upper cover plate 12 sealed, and the ladder face has realized the sealed of horizontal and two vertical directions, and sealing member 2 has realized the sealed of the inner peripheral surface to first through-hole, and electrically conductive connecting block 3 is used for realizing the connection of a plurality of batteries, and the inner peripheral surface of the second through-hole of sealing member 2 has realized the sealed of electrically conductive connecting block 3, and the leakproofness is good.

When a plurality of batteries need to be connected in series, if the pole 10 is a cathode, the pole is connected with the anode of another battery in a welding way through the conductive connecting block 3 of one battery, so that the batteries are connected in series, and the pole 10 is matched with the anode of the battery to supply power to the outside; if the pole 10 is a positive pole, the pole is welded and connected with the negative pole of another battery through the conductive connecting block 3 of one battery, so that the batteries are connected in series. The direct welding through utmost point post 10 can cause the damage to utmost point post 10, influences the performance of whole battery, so set up electrically conductive connecting block 3 and be used for the series connection of a plurality of batteries.

Referring to fig. 2 and 3, the sealing member 2 includes a vertical sealing portion 21 and a horizontal sealing portion 22, an outer peripheral surface of the vertical sealing portion 21 abuts against an inner peripheral surface of the first through hole, the horizontal sealing portion 22 is fixedly connected to one end of the vertical sealing portion 21, which is far away from the battery cavity, the horizontal sealing portion 22 abuts against an end surface of the upper cover plate 12, which is far away from the battery cavity, the vertical sealing portion 21 of the sealing member 2 seals the inner peripheral surface of the first through hole of the upper cover plate 12, and the horizontal sealing portion 22 seals the end surface of the upper cover plate 12, which is far away from the battery cavity, so that the upper cover plate 12 has no electrolyte leakage dead angle.

Referring to fig. 2, a protruding portion 121 is annularly arranged around the first through hole at one end of the upper cover plate 12, which is far away from the battery cavity, a horizontal sealing portion 22 abuts against an end face of the protruding portion 121, which is far away from the battery cavity, the horizontal sealing portion 22 seals the end face of the protruding portion 121, which is far away from the battery cavity, an outer circumferential surface of a vertical sealing portion 21 abuts against an inner circumferential surface of the protruding portion 121, the vertical sealing portion 21 seals the inner circumferential surface of the protruding portion 121, and the protruding portion 121 increases the height of the inner circumferential surface of the upper cover plate 12, so that the contact area between the sealing member 2 and the inner circumferential surface of the first through hole is increased, the sealing effect is increased, and materials are saved.

Referring to fig. 2 and 4, the conductive connection block 3 includes a connection body 31 and a press-connection block 32, an outer circumferential surface of the connection body 31 abuts against an inner circumferential surface of the second through hole, the press-connection block 32 is fixedly connected to one end of the connection body 31 away from the battery cavity, the press-connection block 32 abuts against an end surface of the horizontal sealing portion 22 away from the battery cavity, the sealing member 2 seals against the inner circumferential surface of the connection body 31, and the press-connection block 32 presses the sealing member 2 to prevent the sealing member 2 from moving in the axial direction of the battery to affect the sealing effect.

Preferably, the crimping block 32 crimps the whole end face of the sealing member 2 far away from the battery cavity, so that the corners of the sealing member 2 are not easy to tilt, and the sealing effect is better.

Referring to fig. 2 and 5, the outer casing 11 includes integrated into one piece's first tourus 111 and second tourus 112, first tourus 111 and second tourus 112 are coaxial, the internal diameter of second tourus 112 is greater than the internal diameter of first tourus 111, the up end of second tourus 112, the inner peripheral surface of second tourus 112, the up end of first tourus 111 and the inner peripheral surface of first tourus 111 connect gradually and form the ladder face, form double-deck ladder face like this, make the connection of upper cover plate 12 and outer casing 11 inseparabler, thereby prevent that electrolyte from taking place to leak.

The upper cover plate 12 comprises an upper plate 122 and a lower plate 123 which are integrally formed, the upper plate 122 and the lower plate 123 are coaxial, the lower end face of the upper plate 122 is fixedly connected with the upper end face of the second annular body 112, the outer circumferential face of the lower plate 123 is fixedly connected with the inner circumferential face of the second annular body 112, namely, the upper cover plate 12 is fixedly connected with the outer shell 11 in the transverse direction and the longitudinal direction, and the sealing effect is good.

The battery sealing structure further comprises an insulating sheet 4, the insulating sheet 4 is located in the battery cavity, the upper end face of the insulating sheet 4 is abutted against the lower end face of the lower plate 123, the sealing piece 2 and the conductive connecting block 3, the lower end face of the insulating sheet 4 is abutted against the battery connecting sheet 20, the pole column 10 penetrates through the insulating sheet 4 and is fixedly connected with the upper end face of the battery connecting sheet 20, and the insulating sheet 4 is used for isolating the upper cover plate 12 from the battery connecting sheet 20 and does not influence the connection between the battery connecting sheet 20 and the pole column 10.

The outer peripheral face of insulating piece 4 and the inner peripheral surface butt of second tourus 112, the up end of insulating piece 4 and the lower terminal surface butt of hypoplastron 123, the lower terminal surface butt of insulating piece 4 and the up end butt of first tourus 111, installation and processing are convenient, only need to accomplish the installation with upper cover plate 12 and second tourus 112 fixed connection, do not need upper cover plate 12 to be connected with first tourus 111.

The outer shell 11 and the upper cover plate 12 are welded, the welded connection structure is stable, the sealing performance is good, and the contact places of the outer shell 11 and the upper cover plate 12 are all welded to prevent the leakage of the battery electrolyte.

Example two

Fig. 7 and 8 show a second embodiment, wherein the same or corresponding parts as the first embodiment are provided with the same reference numerals as the first embodiment. For the sake of simplicity, only the differences between the second embodiment and the first embodiment will be described. The difference is that the lower end face of the lower plate 123 is fixedly connected with the upper end face of the first circular ring body 111, the outer circumferential face of the insulating sheet 4 is arranged at an interval with the inner circumferential face of the outer shell 11, in this embodiment, not only the upper cover plate 12 needs to be fixedly connected with the second circular ring body 112, but also the upper cover plate 12 needs to be fixedly connected with the first circular ring body 111, that is, the upper cover plate 12 is fixedly connected with the upper end face of the second circular ring body 112, the inner circumferential face of the second circular ring body 112 and the upper end face of the first circular ring body 111, so that the connection is more stable and the sealing effect is increased.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.