CN219066995U - Battery cover plate and blade battery - Google Patents

Abstract

The utility model provides a battery cover plate and a blade battery, and relates to the technical field of batteries. The battery cover plate comprises a cover plate body and a cover plate. The cover plate body is provided with a pole connecting piece which is suitable for being electrically connected with a pole lug of the battery; the first side edge of the box cover is rotationally connected with the first side edge of the cover plate body, and the second side edge of the box cover is connected with the second side edge of the cover plate body in an openable and closable manner through a clamping structure; the clamping structure comprises a clamping groove and a clamping piece which are suitable for mutual clamping and matching, one of the cover plate body and the box cover is provided with the clamping groove, and the other one of the cover plate body and the box cover is provided with the clamping piece; when the clamping groove is clamped with the clamping piece, a clamping gap suitable for clamping the lug is formed between the box cover and the cover plate body. The utility model can solve the problems of complex process and low productivity caused by the adoption of a laser welding mode for the battery cell tab and the cover plate in the prior art, and has the effects of simplifying the process, improving the beat and the productivity and saving the cost.

Description

Battery cover plate and blade battery

Technical Field

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

Background

Currently, simplification of the blade battery process and structure is a trend. At present, the connection of the battery cell lug and the cover plate of the blade adopts a laser welding mode to connect the lug and the cover plate together, and the dust removal rubberizing process is carried out on the laser welding place. After laser welding, the insulation between the lug and the body after the cover plate is folded can be ensured by further dedusting and rubberizing, the process is complex, and due to heat accumulation in laser welding, the follow-up process is carried out after heat dissipation, the beat improvement degree is limited, and the productivity is low.

Disclosure of Invention

The utility model aims to overcome the defects of complex process and low productivity caused by the adoption of a laser welding mode for battery cell lugs and cover plates in the prior art, thereby providing a battery cover plate and a blade battery.

In order to solve the above problems, an aspect of the present utility model provides a battery cover, including a cover body and a cover cap. The cover plate body is provided with a pole connecting piece which is suitable for being electrically connected with a pole lug of the battery; the first side edge of the box cover is rotationally connected with the first side edge of the cover plate body, and the second side edge of the box cover is connected with the second side edge of the cover plate body in an openable and closable manner through a clamping structure; the clamping structure comprises a clamping groove and a clamping piece which are suitable for mutual clamping and matching, one of the cover plate body and the box cover is provided with the clamping groove, and the other one of the cover plate body and the box cover is provided with the clamping piece; when the clamping groove is clamped with the clamping piece, a clamping gap suitable for clamping the lug is formed between the box cover and the cover plate body.

Optionally, the clamping piece comprises a clamping column, and a feeding port is arranged at one side of the clamping groove, which is close to the box cover.

Optionally, a guiding surface is provided at a side of the bottom of the clamping groove facing away from the notch of the clamping groove, and the guiding surface is inclined toward the feeding port.

Optionally, two clamping structures are provided, two clamping columns are oppositely arranged at two ends of the box cover, and the axial direction of each clamping column is arranged along the length direction of the cover plate body; the two clamping grooves are arranged at the corresponding positions of the cover plate body.

Optionally, the cover has a clamping surface, and when the cover is buckled with the cover body, the clamping surface faces the pole connecting piece; the clamping surface is provided with a plurality of bulges.

Optionally, the protrusions are in a strip-shaped structure.

Optionally, two pole connecting pieces are arranged at intervals along the length direction of the cover plate body, and the protrusions and the pole connecting pieces are correspondingly arranged.

Optionally, the box cover comprises a box cover body, the first side of the box cover body is provided with a hinge post protruding from the box cover body, the length of the hinge post is not less than that of the box cover body, and two ends of the hinge post are hinged with the box cover body.

Optionally, one end of the cover plate body is provided with a mounting seat, a mounting cavity is arranged in the mounting seat, and the mounting cavity is suitable for mounting the explosion-proof valve.

In another aspect, the utility model provides a blade battery, which comprises an electric core and a battery cover plate according to any one of the technical schemes. The end part of the battery core is provided with a tab; the tab is lapped on the tab connecting piece and clamped in the clamping gap.

The utility model has the following advantages:

1. according to the technical scheme, the box cover and the cover plate body are connected in an openable and closable manner through the clamping structure, when the clamping piece in the clamping structure is clamped and matched with the clamping groove, a clamping gap exists between the box cover and the cover plate body, the lug can be clamped between the box cover and the cover plate body, and the cover plate body is provided with the pole column connecting sheet, so that the pole column connecting sheet can be electrically connected with the lug, and the connection between the battery core and the cover plate is realized. Compared with the existing laser welding mode, the battery cell and the battery cover plate can be quickly connected, and the welding, dust removing, rubberizing and other working procedures are not needed, so that the process is simplified, the working procedures are saved, the beat can be effectively improved, and the productivity is improved; and corresponding equipment for welding, dedusting and rubberizing is omitted, so that the production cost is saved.

2. One side of the clamping groove is provided with a feeding port, so that the clamping column and the clamping groove are conveniently clamped, and the quick assembly of the battery cell and the battery cover plate is realized.

3. The bottom of the clamping groove is provided with a guide surface, so that the clamping column can smoothly slide into the feeding port, and is clamped in the clamping groove; the provision of the guide surface can further improve the assembly speed of the battery cell and the battery cover plate.

4. Through setting up the arch on the lid, when lid and apron body lock, can increase the pressure of lid pair tab through the arch, improve clamping force for the tab centre gripping is more firm, stable, improves the security performance of battery.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic structural diagram of a battery cover plate (a case cover is in an open state) according to an embodiment of the present utility model;

FIG. 2 shows an enlarged view of the structure at I in FIG. 1;

FIG. 3 shows an exploded view of FIG. 1;

FIG. 4 shows an enlarged view of a portion of a battery cover prior to an assembly process with a battery cell;

FIG. 5 shows an enlarged partial view of the tab overlapping the pole connection piece;

fig. 6 shows a schematic structural diagram of the battery cover plate before the cover plate is buckled in the process of assembling the battery cover plate and the battery core;

FIG. 7 shows a partial enlarged view of FIG. 6;

fig. 8 shows an enlarged view of a portion of the assembled battery cover and cell.

Reference numerals illustrate:

1. a cover plate body; 11. a hinge hole; 2. a box cover; 21. a box cover body; 22. a clamping surface; 23. a protrusion; 24. a hinge post; 241. a hinge shaft; 25. a mounting base; 251. a mounting cavity; 3. a clamping structure; 31. a clamping groove; 311. a feeding port; 312. a guide surface; 32. a clamping piece; 321. a clamping column; 4. a pole connection piece; 10. a battery cover plate; 20. a battery cell; 30. and a tab.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

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 can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

For the purpose of illustrating the concepts of the utility model, the drawings and detailed description are to be regarded as illustrative in nature and not as restrictive.

Example 1

A battery cover 10, referring to fig. 1-3, includes a cover body 1 and a cover 2. Wherein, the cover plate body 1 is provided with a pole connecting piece 4 which is suitable for being electrically connected with the pole lug 30 of the battery; the first side edge of the box cover 2 is rotationally connected with the first side edge of the cover plate body 1, and the second side edge of the box cover 2 is connected with the cover plate body 1 in an openable and closable manner through a clamping structure 3; the clamping structure 3 comprises a clamping groove 31 and a clamping piece 32 which are matched with each other, one of the cover plate body 1 and the box cover 2 is provided with the clamping groove 31, and the other one of the cover plate body 1 and the box cover 2 is provided with the clamping piece 32; when the clamping groove 31 and the clamping piece 32 are clamped, a clamping gap suitable for clamping the lug 30 is formed between the box cover 2 and the cover plate body 1.

Specifically, the box cover 2 has an open state and a buckled state; when the clamping piece 32 is clamped with the clamping groove 31, the box cover 2 is in a buckling state; when the engaging piece 32 is separated from the engaging groove 31, the lid 2 is in an open state. When the cover 2 and the cover body 1 are engaged, a flat clamping gap can be formed, and the flat surfaces on both sides of the tab 30 can be clamped.

According to the technical scheme, the box cover 2 and the cover plate body 1 are connected in an openable and closable manner through the clamping structure 3, when the clamping piece 32 in the clamping structure 3 is clamped and matched with the clamping groove 31, a clamping gap exists between the box cover 2 and the cover plate body 1, the lug 30 can be clamped between the box cover 2 and the cover plate body 1, and the lug connecting piece 4 is arranged on the cover plate body 1 and can be electrically connected with the lug 30, so that the connection between the battery cell 20 and the cover plate is realized. Compared with the existing laser welding mode, the battery cell 20 and the battery cover plate 10 can be connected quickly, and the utility model does not need the procedures of welding, dust removal, rubberizing and the like, simplifies the process, saves the procedures, and can effectively improve the beat, thereby improving the productivity; and corresponding equipment for welding, dedusting and rubberizing is omitted, so that the production cost is saved.

Specifically, the battery cover plate 10 provided in this embodiment may be used at an end of a blade battery, as shown in fig. 6, where the battery core 20 of the existing blade battery has a rectangular structure, two ends of the battery core 20 are provided with tabs 30, the tabs 30 have a rectangular sheet structure, and the clamping gap is a flat cavity adapted to the tabs 30.

Specifically, lid 2 and apron body 1 are rectangular form structure, and lid 2 and one of them long side of apron body 1 are articulated each other, and lid 2 can swing for the long side of apron body 1.

Alternatively, referring to fig. 1 and 2, the clamping member 32 includes a clamping post 321, and a feeding port 311 is provided at a side of the clamping groove 31 adjacent to the box cover 2. One side of the clamping groove 31 is provided with a feeding port 311, so that the clamping post 321 and the clamping groove 31 are conveniently clamped, and the quick assembly of the battery cell 20 and the battery cover plate 10 is realized.

Alternatively, in this embodiment, the clamping post 321 is a cylinder, and when the clamping post 321 is clamped with the clamping groove 31, the outer peripheral wall of the clamping post 321 is in contact with the groove wall of the clamping groove 31.

Optionally, two clamping structures 3 are provided, and are arranged at two ends of the cover plate body 1 along the length direction of the cover plate body 1. Specifically, in this embodiment, two clamping posts 321 are oppositely disposed at two ends of the box cover 2, and an axial direction of the clamping posts 321 is disposed along a length direction of the cover plate body 1; the two clamping grooves 31 are arranged at corresponding positions of the cover plate body 1.

Optionally, a guiding surface 312 is provided at a side of the bottom of the clamping groove 31 facing away from the notch of the clamping groove 31, and the guiding surface 312 is inclined toward the feeding port 311. The bottom of the locking groove 31 is provided with the guide surface 312, so that the locking post 321 can smoothly slide into the feeding port 311 to be locked in the locking groove 31. Providing the guide surface 312 can further improve the assembly speed of the battery cell 20 and the battery cover 10. Referring to fig. 1, in this embodiment, when the clamping post 321 swinging the box cover 2 to the box cover 2 abuts against the clamping groove 31 of the cover plate body 1, that is, the outer surface of the clamping post 321 contacts the guiding surface 312 of the clamping groove 31, the box cover 2 is pressed down, the clamping post 321 on the box cover 2 presses the guiding surface 312 downwards, so that the clamping groove 31 deforms, the clamping post 321 slides to the feeding port 311 along the guiding surface 312, the feeding port 311 slides into the clamping groove 31, the deformation of the clamping groove 31 is recovered, the clamping fit between the clamping post 321 and the clamping groove 31 is realized, and the clamping post 321 and the clamping groove 31 are in interference fit, so that the clamping is firm. At this time, the cover 2 and the cover body 1 are fastened together, and can be used to clamp the tab 30.

In this embodiment, the notch of the clamping groove 31 is downward, that is, is set back to the clamping post 321, so that the clamping structure 3 can be ensured to be clamped more firmly, and the anti-falling effect is good. Of course, in other embodiments, the notch of the locking groove 31 is disposed upward, and the locking engagement between the locking post 321 and the locking groove 31 can be achieved.

Of course, as an alternative embodiment, the clamping member 32 is disposed on the cover plate body 1, and the clamping groove 31 is disposed on the box cover 2.

Of course, the clamping member 32 and the clamping groove 31 may have other structures in the prior art, and the lid 2 and the cover plate body 1 may be clamped and buckled.

Optionally, the box cover 2 is provided with a clamping surface 22, and when the box cover 2 is buckled with the cover plate body 1, the clamping surface 22 faces the pole connecting piece 4; the clamping surface 22 is provided with a plurality of protrusions 23 adapted to clamp the tab 30. Through set up protruding 23 on lid 2, when lid 2 and apron body 1 lock joint, can increase lid 2 to the pressure of utmost point ear 30 through protruding 23, improve clamping force for utmost point ear 30 centre gripping is more firm, stable, improves the security performance of battery. Specifically, the number of "multiple" projections 23 includes two.

Alternatively, the protrusions 23 are in a strip-like configuration.

Optionally, the length direction of the strip-shaped protrusion 23 and the length direction of the box cover 2 are arranged in the same direction, and the length of the protrusion 23 is matched with the length of the pole connecting piece 4.

Alternatively, since the front end of the protrusion 23 is pressed against the tab 30, in order to further increase the pressing force of the protrusion 23, the protrusion 23 is truncated by a plane parallel to the lid 2, and the sectional area of the protrusion 23 is gradually reduced from the bottom of the protrusion 23 toward the front end of the protrusion 23. As a specific example, the protrusion 23 is truncated by a plane perpendicular to the lid 2, and the cross section of the protrusion 23 is tapered.

Optionally, two pole connecting pieces 4 are arranged at intervals along the length direction of the cover plate body 1, and the protrusions 23 are correspondingly arranged with the pole connecting pieces 4. The pole connection piece 4 is provided separately in two, and can be used for a battery cell 20 with a bipolar pole. And two pole connection pieces 4 that the interval set up, compare in a whole pole connection piece 4, more save material.

Referring to fig. 1 or 3, since two pole connection pieces 4 are provided, two sets of protrusions 23 are provided on the clamping surface 22 of the case cover 2 at positions corresponding to the two pole connection pieces 4, respectively.

Alternatively, referring to fig. 3, the box cover 2 includes a box cover body 21, a hinge post 24 protruding from the box cover body 21 is provided at a first side of the box cover body 21, the length of the hinge post 24 is not less than the length of the box cover body 21, and both ends of the hinge post 24 are hinged with the box cover body 21. In particular, the hinge post 24 is of cylindrical configuration. The hinge post 24 is arranged to reduce the gap between the first side of the box cover 2 and the first side of the cover plate body 1 when the box cover 2 is buckled, and the hinge post 24 can also clamp the side edges of the lugs 30 after buckling, so that the clamping force of the battery cover plate 10 to the lugs 30 is improved.

Referring to fig. 3, hinge shafts 241 extend from both ends of the hinge post 24, and correspondingly, hinge holes 11 are formed at corresponding positions of the cover plate body 1, and the hinge shafts 241 at both ends of the cover plate 2 are respectively inserted into the hinge holes 11 at both ends of the cover plate body 1, so as to realize rotational connection between the cover plate 2 and the cover plate body 1.

Of course, as an alternative embodiment, the positions of the hinge shaft 241 and the hinge hole 11 are interchanged. That is, the lid 2 is provided with a hinge hole 11, and the lid body 1 is provided with a hinge shaft 241.

Optionally, a mounting seat 25 is provided at one end of the cover plate body 1, a mounting cavity 251 is provided in the mounting seat 25, and the mounting cavity 251 is adapted to mount an explosion-proof valve.

Specifically, the box cover 2, the cover plate body 1 and the mounting seat 25 are made of insulating, high-temperature-resistant and electrolyte-resistant materials, including PET, so that insulation between the box cover 2 and the cover plate body 1 is ensured, and the procedures of rubberizing and the like can be omitted. The pole connection piece 4 is of a conductive material.

Compared with the scheme that the battery cover plate 10 and the tab 30 are connected in a laser welding mode, the battery cover plate 10 and the tab 30 provided by the embodiment of the utility model cannot generate heat accumulation when being connected, and are beneficial to improving the production beat, so that the productivity is improved.

Example 2

A blade battery comprising a battery cell 20 and a battery cover 10 as described in example 1. The end part of the battery cell 20 is provided with a tab 30; the tab 30 is overlapped on the tab connection piece 4 and clamped in the clamping gap.

The assembly process between the battery cover 10 and the tab 30 of the battery cell 20 is described with reference to fig. 4-8. Specifically, referring to fig. 4, the cap 2 of the battery cover 10 is opened to face the tab 30; referring to fig. 5, the tab 30 is overlapped on the tab connection piece 4; referring to fig. 6 and 7, the cap 2 is pressed down; until the clamping post 321 on the box cover 2 is clamped in the clamping groove 31, the assembly is completed, as shown in fig. 8.

Alternatively, the two ends of the blade cell 20 are respectively a positive end and a negative end, the positive end is provided with a positive tab 30, the negative end is provided with a negative tab 30, and the positive end and the negative end can be connected with the battery cover plate 10 in embodiment 1.

According to the above description, the present patent application has the following advantages:

1. compared with the existing laser welding mode, the battery cover plate 10 and the tab 30 of the battery core 20 can be quickly connected, and the utility model does not need welding, dust removal, rubberizing and other processes, thereby simplifying the process, saving the working procedures, effectively improving the beat and further improving the productivity; moreover, the corresponding equipment for welding, dedusting and rubberizing is omitted, and the production cost is saved;

2. one side of the clamping groove 31 is provided with a feeding port 311, so that the clamping of the clamping post 321 and the clamping groove 31 is facilitated, and the quick assembly of the battery cell 20 and the battery cover plate 10 is realized;

3. a guiding surface 312 is arranged at the bottom of the clamping groove 31, so that the clamping post 321 can smoothly slide into the feeding inlet 311, and is clamped in the clamping groove 31; providing the guide surface 312 can further improve the assembly speed of the battery cell 20 and the battery cover 10;

4. through set up protruding 23 on lid 2, when lid 2 and apron body 1 lock joint, can increase lid 2 to the pressure of utmost point ear 30 through protruding 23, improve clamping force for utmost point ear 30 centre gripping is more firm, stable, improves the security performance of battery.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (10)

1. A battery cover plate, comprising:

the battery cover comprises a cover plate body (1), wherein a pole connection piece (4) which is suitable for being electrically connected with a pole lug (30) of a battery is arranged on the cover plate body (1);

the first side edge of the box cover (2) is rotationally connected with the first side edge of the cover plate body (1), and the second side edge of the box cover (2) is connected with the second side edge of the cover plate body (1) in an openable and closable manner through a clamping structure (3);

the clamping structure (3) comprises a clamping groove (31) and a clamping piece (32) which are suitable for being mutually clamped and matched, one of the cover plate body (1) and the box cover (2) is provided with the clamping groove (31), and the other of the cover plate body (1) and the box cover (2) is provided with the clamping piece (32); when the clamping groove (31) is clamped with the clamping piece (32), a clamping gap suitable for clamping the lug (30) is formed between the box cover (2) and the cover plate body (1).

2. The battery cover plate according to claim 1, wherein the clamping piece (32) comprises a clamping post (321), and a feeding port (311) is arranged at one side of the clamping groove (31) close to the box cover (2).

3. Battery cover plate according to claim 2, characterized in that the bottom of the clamping groove (31) is provided with a guiding surface (312) at the side facing away from the notch of the clamping groove (31), the guiding surface (312) being arranged obliquely towards the feeding opening (311).

4. A battery cover plate according to claim 2 or 3, wherein two clamping structures (3) are provided, two clamping columns (321) are oppositely arranged at two ends of the box cover (2), and the axial direction of the clamping columns (321) is along the length direction of the cover plate body (1); the two clamping grooves (31) are arranged at corresponding positions of the cover plate body (1).

5. A battery cover according to any one of claims 1-3, characterized in that the cover (2) has a clamping surface (22), the clamping surface (22) facing the pole connection piece (4) when the cover (2) is snapped onto the cover body (1); the clamping surface (22) is provided with a plurality of protrusions (23).

6. Battery cover according to claim 5, characterized in that the protrusions (23) are of a strip-like structure.

7. Battery cover plate according to claim 5, characterized in that two pole connection pieces (4) are arranged at intervals along the length direction of the cover plate body (1), and the protrusions (23) are arranged corresponding to the pole connection pieces (4).

8. A battery cover plate according to any one of claims 1-3, wherein the cover (2) comprises a cover body (21), a hinge post (24) protruding from the cover body (21) is provided at a first side of the cover body (21), the length of the hinge post (24) is not less than the length of the cover body (21), and both ends of the hinge post (24) are hinged with the cover body (21).

9. A battery cover according to any one of claims 1-3, characterized in that one end of the cover body (1) is provided with a mounting seat (25), a mounting cavity (251) is provided in the mounting seat (25), the mounting cavity (251) being adapted to mount an explosion-proof valve.

10. A blade battery, comprising:

the battery cell (20), the end of the battery cell (20) is provided with a tab (30);

the battery cover plate of any one of claims 1-9, the tab (30) overlapping the tab connection piece (4) and being clamped in the clamping gap.

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