CN219873955U - Battery cover plate and sodium ion battery - Google Patents

Abstract

The utility model relates to the technical field of sodium ion batteries and discloses a battery cover plate and a sodium ion battery. The cover plate body reduces the possibility of collision short circuit phenomenon of the battery during use, reduces the occurrence of dangerous situations, and simultaneously realizes the universality of the anode and cathode cover plates through the monopole column mechanism.

Description

Battery cover plate and sodium ion battery

Technical Field

The utility model relates to the technical field of sodium ion batteries, in particular to a battery cover plate and a sodium ion battery.

Background

Compared with a lithium ion battery, the positive electrode post, the negative electrode post, the current collector and the like of the sodium ion battery cover plate have obvious changes. The lithium ion battery is different from the common positive electrode pole and current collector of the lithium ion battery, the negative electrode pole and current collector are made of aluminum materials, the sodium ion battery is made of aluminum materials in the positive and negative aspects, and the manufacturing cost is reduced.

However, the existing cylindrical battery cover plate is mainly used for lithium ion batteries, the cover plate is provided with a positive electrode post, the shell and a negative electrode post are shared, the battery shell is directly wrapped by a thermal shrinkage sleeve film in the current insulation measure, so that the situation that the insulation sleeve is damaged or the position is poor is easy to occur, and the battery is possibly short-circuited in use and dangerous.

Disclosure of Invention

The utility model aims to solve the problem that the battery in the prior art may have a short circuit phenomenon during use, and provides a battery cover plate and a sodium ion battery.

In order to achieve the above object, according to one aspect of the present utility model, a battery cover plate is provided, which includes a cover plate body, wherein a pole and an insulating bracket are respectively disposed on the upper and lower sides of the cover plate body, a connecting piece is disposed on the lower side of the insulating bracket, the pole, the cover plate body, the insulating bracket and the connecting piece are riveted and fixed by rivets having conductive properties, and the pole, the rivets and the connecting piece are electrically connected.

Preferably, the battery cover plate further comprises an insulating sealing gasket and an insulating sealing ring fixedly connected to the lower side of the insulating sealing gasket, and the cover plate body is provided with a positioning hole capable of being embedded into the insulating sealing ring.

Preferably, the outer edge of the lower end of the insulating sealing ring is provided with a sealing edge strip attached to the lower side surface of the cover plate body, and the insulating support is provided with an embedding hole capable of being embedded into the sealing edge strip; the pole, the insulating sealing gasket, the insulating sealing ring and the connecting sheet are respectively provided with a first through hole, a second through hole, a third through hole and a fourth through hole which can pass through the rivet.

Preferably, the insulating bracket comprises a bracket plate, and a protective bracket and a limiting column fixedly connected to the lower side of the bracket plate.

Preferably, the bottom surface of the cover plate body is provided with a groove capable of being embedded with the support plate.

Preferably, the protection support is a plurality of arc plates, and a plurality of arc plates are symmetrically arranged on two sides of the connecting sheet.

Preferably, the pole, the connecting piece and the rivet are all made of aluminum alloy materials.

Preferably, the cover plate body is provided with an explosion-proof valve.

Preferably, the cover plate body is provided with a liquid injection port.

In another aspect, the utility model provides a sodium ion battery, which comprises the battery cover plate.

Through above-mentioned technical scheme, the utmost point post sets up at the outer end, realize electrically conductive through rivet electric connection between utmost point post and the connection piece, set up the apron body and the stable location of utmost point post on it in the battery through insulating support in addition, stability is high, and is insulating good, because the insulating measure is not the mode of adopting the thermal shrinkage mantle directly to wrap up battery case, and then the condition that the insulating cover is damaged or the position is bad is difficult to take place, thereby the possibility that the battery can take place the short circuit phenomenon when using has been reduced, dangerous condition's emergence has been reduced, and according to the characteristic of the structure of this battery apron, adopt the monopole post structure, can realize the commonality of positive negative pole apron.

Drawings

FIG. 1 is a schematic top view of a preferred embodiment of a battery cover plate;

FIG. 2 is a schematic view of the structure of a battery cover plate at a bottom angle of a preferred embodiment;

fig. 3 is an exploded view of a preferred embodiment of a battery cover plate.

Description of the reference numerals

1-a cover plate body; 2-pole; 3-rivets; 4-a liquid injection port; 5-an explosion-proof valve; 6-insulating sealing gaskets; 7-insulating supports; 8-connecting sheets; 9-a first through hole; 10-positioning holes; 11-a second through hole; 12-insulating sealing rings; 13-explosion-proof overflow holes; 14-inserting holes; 15-a protective bracket; 16-filling a flow hole; 17-fourth through holes; 18-limit posts.

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

In the present utility model, unless otherwise indicated, terms such as "upper, lower, left, right, front, rear, and inner and outer" and the like are used merely to denote the orientation of the term in a conventional use state or are commonly understood by those skilled in the art, and should not be construed as limiting the term.

Referring to the battery cover plate shown in fig. 1-3, the battery cover plate comprises a cover plate body 1, wherein a pole 2 and an insulating support 7 are respectively arranged on the upper side and the lower side of the cover plate body 1, a connecting sheet 8 is arranged on the lower side of the insulating support 7, the pole 2, the cover plate body 1, the insulating support 7 and the connecting sheet 8 are riveted and fixed through a rivet 3 with conductivity, and the pole 2, the rivet 3 and the connecting sheet 8 are electrically connected.

Through the implementation of the technical scheme, the pole column 2 is arranged at the outermost end, electric conduction is realized through rivet 3 electric connection between the pole column 2 and the connecting sheet 8, the cover plate body 1 and the pole column 2 on the cover plate body are stably positioned in the battery through the arrangement of the insulating support 7, the stability is high, the insulativity is good, as the insulating measure is not a mode of directly wrapping the battery shell by adopting a heat shrinkage sleeve film, the situation that the insulating sleeve is damaged or the position is poor is not easy to occur, the possibility that the battery is possibly short-circuited when in use is reduced, the occurrence of dangerous situations is reduced, and the common use of the anode cover plate and the cathode cover plate can be realized by adopting a monopole column 2 structure according to the characteristics of the structure of the battery cover plate.

In this embodiment, in order to further improve the insulation performance, the battery cover further includes an insulation gasket 6 and an insulation sealing ring 12 fixedly connected to the lower side of the insulation gasket 6, and the cover body 1 is provided with a positioning hole 10 capable of being inserted into the insulation sealing ring 12.

By arranging the sheet-shaped insulating sealing gasket 6 to insulate and seal the pole 2 from the cover plate body 1, in addition, the insulating sealing ring 12 is nested in the positioning hole 10 to insulate and seal the cover plate body 1 from the rivet 3, and it is required to be noted that after the insulating sealing ring 12 is nested in the positioning hole 10, the outer wall of the insulating sealing ring 12 should be tightly attached to the inner wall of the positioning hole 10 to obtain good sealing performance.

Of course, in order to further obtain better insulating sealing performance, a sealing edge strip attached to the lower side surface of the cover plate body 1 is arranged at the outer edge of the lower end of the insulating sealing ring 12, and an embedding hole 14 capable of embedding the sealing edge strip is arranged on the insulating bracket 7; the pole 2, the insulating sealing gasket 6, the insulating sealing ring 12 and the connecting sheet 8 are respectively provided with a first through hole 9, a second through hole 11, a third through hole and a fourth through hole 17 which can pass through the rivet 3. The sealing between the rivet 3 and the insulation is achieved by the arrangement of the sealing edge strip.

It should be noted that the peripheral edge of the sealing rim should be kept in close contact with the inner wall of the insertion hole 14 when the peripheral edge of the sealing rim is nested in the insertion hole 14, and the concave ring structure formed between the sealing rim and the insulating gasket 6 should tightly clamp the cap body 1 to improve the overall stability of the assembly.

At the same time, the underside of the sealing strip should be kept from protruding beyond the lower edge of the insulating support 7, so as not to interfere with the mounting of the connecting piece 8.

In this embodiment, in order to further provide a structure of the insulating bracket 7, the insulating bracket 7 includes a bracket plate, and a protective bracket 15 and a limit post 18 fixedly connected to the lower side of the bracket plate. In the process of assembling the battery cell, the connecting sheet 8 can be directly bent and then positioned at a corresponding fixed position of the battery cell, so that the connecting sheet 8 is prevented from being misplaced in the process of assembling, in addition, a certain protection effect can be achieved through the protection support 15, and the assembly depth of the battery cover plate is controlled through the limit column 18, so that the battery cell is prevented from being excessively covered and damaged.

In this embodiment, the bottom surface of the cover body 1 is provided with a groove into which the bracket plate can be fitted. The internal diameter of this recess should with the external diameter phase-match of mounting panel for the mounting panel can the local plug in its thickness direction can, can make the mounting panel keep stable location in the horizontal direction through the setting of recess, avoid dislocation, promoted the stability of whole assembly.

Further, in order to further improve the stability of assembly, the protection support 15 is a plurality of arc plates, and a plurality of arc plates are symmetrically disposed on two sides of the connecting piece 8. Through the setting of a plurality of symmetrical arc, for example adopt the setting of interval mode, can play good protective effect.

In this embodiment, the pole 2, the connecting piece 8 and the rivet 3 are all made of aluminum alloy. The materials of the pole 2, the connecting sheet 8 and the rivet 3 are uniformly made of aluminum alloy materials to be used as conductive media, so that the manufacturing cost can be reduced, and the overall weight of the battery can be reduced.

Of course, in order to improve the safety of the battery, the cover plate body 1 is provided with an explosion-proof valve 6. When the temperature inside the battery cell reaches the explosion limit, the explosion-proof valve 6 is broken, so that the heat inside the corresponding battery cell can be rapidly released, and the battery cell is prevented from being exploded to cause the explosion of other battery cells. In general, the explosion-proof valve 6 is composed of an explosion-proof sheet welded in a preformed hole of the cover body 1 and a protective film. In addition, if the surface of the insulating support 7 affects the internal heat burst of the battery cell, an explosion-proof overflow hole 13 should be arranged at a position corresponding to the explosion-proof valve 6 on the surface of the insulating support 7 so as to facilitate the internal heat burst of the battery cell.

In this embodiment, the cap body 1 is provided with a liquid inlet 4. By arranging the liquid injection port 4 on the cover plate body 1, the liquid injection port 4 is reserved, and electrolyte is conveniently supplemented at the end of the service life of the sodium ion battery. In addition, if the surface of the insulating support 7 affects electrolyte replenishment, an injection flow hole 16 should be provided on the surface of the insulating support 7 at a position corresponding to the injection port 4, so as to facilitate the entry of electrolyte. The liquid filling port 4 should be a liquid filling valve with a non-return function, so that electrolyte can only be added from outside to inside and cannot flow out from inside to outside.

In some embodiments of the present utility model, the cover plate body 1 and the insulating support 7 have a circular structure, the pole 2 has an oblong structure, and 2 symmetrical first through holes 9 are formed in the pole; the post 2 adopts an AL1060 aluminum alloy with good plasticity, corrosion resistance, electrical conductivity and thermal conductivity and thickness of 1.5 mm; 2 positioning holes 10 are also formed in the cover plate body 1, the thickness of the cover plate body 1 is 1.5mm, and the cover plate body is made of AL3003 aluminum alloy; the insulating sealing gasket 6 and the insulating sealing ring 12 are of an integral injection molding structure, and are made of PFA materials with good corrosion resistance and sealing property; the second through hole 11, the third through hole and the fourth through hole 17 are respectively provided with 2, and the rivets 3 are correspondingly provided with 2; the insulating bracket 7 is also of an integral injection molding structure, and is made of PPHJ400 material with better corrosion resistance and plasticity, and the thickness of the bracket plate is 1.0mm; the thickness of the connecting piece 8 is 0.3mm.

In addition, another aspect of the utility model provides a sodium ion battery, which comprises the battery cover plate. When the battery cover plate is used, the battery cover plate can be used as a positive electrode and/or a negative electrode of a sodium ion battery.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the simple modifications belong to the protection scope of the present utility model.

In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.

Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.

Claims (10)

1. The utility model provides a battery cover plate, includes apron body (1), its characterized in that, the upper and lower both sides of apron body (1) are provided with utmost point post (2) and insulating support (7) respectively, the downside of insulating support (7) is provided with connection piece (8), rivet fixing through rivet (3) that have conductive properties between utmost point post (2), apron body (1), insulating support (7) and connection piece (8), and electric connection between utmost point post (2), rivet (3) and connection piece (8).

2. The battery cover plate according to claim 1, further comprising an insulating sealing gasket (6) and an insulating sealing ring (12) fixedly connected to the lower side of the insulating sealing gasket (6), wherein the cover plate body (1) is provided with a positioning hole (10) capable of being embedded into the insulating sealing ring (12).

3. The battery cover plate according to claim 2, wherein the outer edge of the lower end of the insulating sealing ring (12) is provided with a sealing edge strip attached to the lower side surface of the cover plate body (1), and the insulating bracket (7) is provided with an embedding hole (14) capable of embedding the sealing edge strip;

the pole column (2), the insulating sealing gasket (6), the insulating sealing ring (12) and the connecting sheet (8) are respectively provided with a first through hole (9), a second through hole (11), a third through hole and a fourth through hole (17) which can pass through the rivet (3).

4. Battery cover plate according to claim 1, characterized in that the insulating bracket (7) comprises a bracket plate as well as a protective bracket (15) and a limit post (18) fixedly connected to the underside of the bracket plate.

5. The battery cover according to claim 4, characterized in that the bottom surface of the cover body (1) is provided with a recess into which the bracket plate can be fitted.

6. The battery cover plate according to claim 4, wherein the protective bracket (15) is a plurality of arc plates symmetrically arranged on both sides of the connecting sheet (8).

7. Battery cover plate according to claim 1, characterized in that the terminal post (2), the connecting piece (8) and the rivet (3) are all of aluminium alloy material.

8. Battery cover according to claim 1, characterized in that the cover body (1) is provided with an explosion-proof valve (5).

9. Battery cover according to any one of claims 1-8, characterized in that the cover body (1) is provided with a liquid filling opening (4).

10. A sodium ion battery comprising a battery cover as claimed in any one of claims 1 to 9.