CN220492127U - Current collecting disc and single battery - Google Patents

Abstract

The utility model relates to the technical field of battery production and discloses a current collecting disc and a single battery, wherein the single battery comprises a battery shell and the current collecting disc, and the current collecting disc comprises a base plate, a folding lug and a connecting block; the substrate has a curved edge, the perimeter of the Qu Bianyan substrate extending; one side of the folding lug, which is close to the curved edge, is provided with a folding edge; the connecting block is arranged between the base plate and the folding lug, one end of the connecting block is connected with the curved edge, and the opposite end is connected with the folding edge; wherein, the hem, bent limit and linking piece form the groove of bending jointly, and the groove of bending sets up between base plate and book ear. The connecting block is used for connecting the folding lug with the base plate, so that the folding lug can not generate internal stress on the base plate in the bending process, the flatness of the base plate is ensured, the folding lug can be completely attached to the inside of the battery shell through arranging the folding edge and the curved edge at intervals, the conductive area is ensured, the performance of the current collecting disc is improved, a gap is not reserved between the folding lug and the inner wall of the battery shell, the welding quality can be ensured, and the yield is improved.

Description

Current collecting disc and single battery

Technical Field

The utility model relates to the technical field of battery production, in particular to a current collecting disc and a single battery.

Background

A battery refers to a device that converts chemical energy into electrical energy in a cup, tank, or other container or portion of a composite container that contains an electrolyte solution and metal electrodes to generate an electrical current. The current collecting disc is an important component of the battery, and the current collecting disc is used as a conductive bridge for connecting the battery polar plate and the battery shell, is required to bear certain high-current charge and discharge, and is required to ensure that the battery does not generate heat, corrode or leak liquid when in maximum power discharge, and is safe and reliable, so that the bonding conductive area of the current collecting disc and the battery shell is particularly important.

The existing current collecting disc adopts a mode of arranging folding lugs on the outer edge of a plate-shaped structure, and is put into a battery shell after the folding lugs are bent, and then welded and fixed. However, since the plate-shaped structure of the current collecting disc is mostly round, and the folding lugs are rectangular with the same overall width, internal stress can be generated to the plate-shaped structure in the process of bending the folding lugs, so that the plate-shaped structure is deformed, the folding lugs cannot be completely attached to the inner wall of the battery shell, the conductive area is further affected, the performance of the current collecting disc is affected, welding is difficult, and the yield is low.

Disclosure of Invention

The utility model aims to solve the technical problems that:

the folded lug can not be completely attached to the inner wall of the battery shell, the performance of the current collecting disc is affected, and the welding difficulty and the yield are low.

In order to solve the above technical problems, the present utility model provides a current collecting plate, including:

a substrate having a curved edge extending along a periphery of the substrate;

a folding lug, wherein one side of the folding lug, which is close to the curved edge, is provided with a folding edge; and

The connecting block is arranged between the base plate and the folding lug, one end of the connecting block is connected with the curved edge, and the opposite end is connected with the folding edge;

the folding edge, the bending edge and the connecting block jointly form a bending groove, and the bending groove is arranged between the base plate and the bending lug.

In one embodiment, the engagement block is disposed at a middle position of the folded edge, and the bending groove is partitioned at both sides of the engagement block in a length direction of the folded edge.

In one embodiment, the distance between the curved edge and the folded edge increases from the extension direction of the folded edge.

In one embodiment, the connecting blocks are oppositely arranged at two ends of the folded edge, and the bending groove is arranged between the connecting blocks at two ends.

In one embodiment, the curved edge between the two end engagement blocks is arranged to be convex towards the direction close to the folding edge.

In one embodiment, the bending groove is provided with a wide diameter part and a narrow diameter part; in the length direction of the folded edge, the wide diameter parts are oppositely arranged at two ends of the bending groove, the narrow diameter parts are arranged at the middle positions of the bending groove, and the narrow diameter parts correspond to the middle positions of the folded edge.

In one embodiment, the substrate is in a circular straight plate shape, and the curved edge is circularly arranged on the outer side of the substrate in a surrounding manner.

In one embodiment, the folding lug is in a rectangular straight plate shape, and the folding edge extends in a straight line along the tangential direction of the curved edge.

In one embodiment, the number of the folded lugs is at least two, and each folded lug is uniformly spaced around the substrate.

In one embodiment, the base plate, the hinge and the engagement block are integrally formed.

A single cell comprising:

the battery shell is internally provided with an accommodating cavity; and

The collecting tray; the collecting tray is connected with the battery case, the collecting tray cover is provided with the accommodating cavity, and the folding lugs of the collecting tray are attached to the side wall of the accommodating cavity.

Compared with the prior art, the collecting disc has the beneficial effects that:

the connecting block is used for connecting the folding lug with the base plate, so that the folding lug can not generate internal stress to the base plate in the bending process, the flatness of the base plate is ensured, the folding lug can be bent into a shape corresponding to the curved edge of the base plate through arranging the folding edge and the curved edge at intervals, when the battery shell is placed in the battery, the folding lug can be completely attached to the inside of the battery shell, the conductive area between the current collecting disc and the battery shell is improved, the performance of the current collecting disc is improved, a gap is not reserved between the folding lug and the inner wall of the battery shell, the welding quality can be ensured, and the yield is improved.

Through the mode with the intermediate position setting of linking piece at the hem for the bending groove is separated in the both sides of linking piece, and the both sides of hem all can buckle, has improved the deflection of hem, and then guarantees that the hem can be better with the laminating of battery case inner wall, further improves current collecting tray performance and welding quality.

Through the mode with linking piece setting at hem both ends for bending groove sets up between the linking piece at both ends, because both ends are fixed at the in-process of buckling to the ear, improves the connection reliability between ear and the base plate, and then improves the shock resistance of mass flow dish.

Drawings

Fig. 1 is a schematic structural view of a collecting tray according to an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of a portion of circle A in FIG. 1;

FIG. 3 is a schematic view of the structure of the current collecting plate of FIG. 1 in a bent state;

fig. 4 is a schematic structural view of a collecting tray according to another embodiment of the present utility model;

FIG. 5 is an enlarged schematic view of a portion B of FIG. 4;

fig. 6 is a schematic structural view of the current collecting plate of fig. 4 in a bent state;

fig. 7 is an exploded view of a battery cell according to an embodiment of the present utility model.

The meaning of the reference numerals in the drawings are:

100. a collecting tray;

10. a substrate; 11. a curved edge;

20. folding the lugs; 21. folding edges; 25. a bending groove; 26. a wide diameter portion; 27. a narrow diameter portion;

30. a joint block;

200. a single battery;

90. battery case, 95, holding chamber.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

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, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. 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 the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 to 7, a current collecting tray 100 according to an embodiment of the utility model includes a substrate 10, a tab 20 and a connecting block 30. The base plate 10 has a curved edge 11, the curved edge 11 extends along the periphery of the base plate 10, and the base plate 10 is used for covering the battery case 90, so as to fix the battery cell in the battery case 90. The lug 20 has a fold 21 on the side thereof adjacent to the curved edge 11. The connecting block 30 is arranged between the substrate 10 and the folding lug 20, one end of the connecting block 30 is connected with the bent edge 11, the opposite end is connected with the folding lug 20, the substrate 10 is connected with the folding lug 20 through the connecting block 30, the internal stress of the substrate 10 can not be generated in the process of bending the folding lug 20 relative to the substrate 10, the substrate 10 is prevented from being deformed due to the internal stress, the flatness of the substrate 10 is ensured, the bonding degree of the folding lug 20 and the inner wall of the battery case 90 is prevented from being influenced due to the deformation of the substrate 10, the subsequent welding quality is ensured, the reject ratio is reduced, and the yield is improved. Wherein, hem 21, bent limit 11 and linking piece form the groove 25 of bending jointly, the groove 25 of bending sets up between base plate 10 and book ear 20, guarantees through setting up the groove 25 of bending and rolls over ear 20 and can bend deformation, makes book ear 20 can bend into the shape corresponding with bent limit 11, and then can laminate completely with the inner wall when putting into battery case 90, guarantees sufficient laminating conductive area for current collecting tray 100 can bear bigger electric current and charge-discharge power, and then improves the performance of current collecting tray 100.

Further, the substrate 10 is in a shape of a circular straight plate, and the curved edge 11 is circularly arranged on the outer side of the substrate 10; in other embodiments, the substrate 10 may also have an oval plate-like, a spindle-like, or other curved plate-like structure, and the curved edge 11 may have a shape corresponding to the shape of the outer edge of the substrate 10. It will be appreciated that the shape of the base plate 10 is selected to correspond to the shape of the battery case 90 to ensure that the base plate 10 covers the battery case 90.

Further, the lug 20 has a rectangular straight plate shape, and the lug 20 is disposed at a peripheral position of the base plate 10. In this embodiment, the folded edge 21 extends in a straight line along the tangential direction of the curved edge 11, so as to ensure that after the folded lug 20 is folded into a shape corresponding to the curved edge 11, the lengths of the positions on the folded edge 21 from the curved edge 11 are equal, so that the current distribution on the folded lug 20 is more uniform in the conducting process, thereby improving the heat dissipation effect of the current collecting plate 100 and avoiding the concentration of heat.

Further, the number of the tabs 20 is at least two, and each tab 20 is uniformly spaced around the substrate 10, so as to ensure that the fixing positions of the current collecting tray 100 and the battery case 90 are uniformly distributed, and improve the connection reliability of the current collecting tray 100 and the battery case 90. In this embodiment, the number of the folded lugs 20 is four, the four folded lugs 20 are uniformly arranged on the substrate 10 at intervals, the number of the connection blocks 30 is the same as the number of the folded lugs 20, and the connection blocks 30 are arranged in one-to-one correspondence with the folded lugs 20.

Further, the connecting block 30 has a strip structure, two ends of the connecting block 30 are respectively connected with the hinge 20 and the substrate 10, the connecting block 30 is used for rotatably connecting the hinge 20 with the substrate 10, so as to prevent internal stress generated in the substrate 10 when the hinge 20 rotates relative to the substrate 10, prevent the substrate 10 from generating strain due to the traction effect of the internal stress, and further ensure the fitting degree of the hinge 20 and the inner wall of the battery case 90. In this embodiment, the base plate 10, the hinge 20 and the connecting block 30 are integrally formed, so as to ensure the overall strength of the current collecting tray 100 and improve the impact resistance of the current collecting tray 100.

Further, referring to fig. 1 to 3, the connecting block 30 is disposed at a middle position of the folded edge 21, and the bending grooves 25 are separated at two sides of the connecting block 30 in the length direction of the folded edge 21, so that the two ends of the folded lug 20 in the length direction of the folded edge 21 can be bent by disposing the bending grooves 25 at two sides of the connecting block 30, so that the folded lug 20 can be bent into a shape corresponding to the curved edge 11, and the deformability of the folded lug 20 is improved, the bonding degree of the folded lug 20 and the inner wall of the battery case 90 is ensured, so that a sufficient conductive area is ensured, the performance of the current collecting tray 100 is improved, the bonding degree is improved, the welding quality of the subsequent welding process is ensured, the reject ratio is reduced, and the yield is improved. In the present embodiment, the distance between the curved edge 11 and the folded edge 21 increases from the extending direction of the folded edge 21. The curved edge 11 extends away from the folded edge 21 along the length direction of the folded edge 21 from the connecting block 30, so as to ensure that the folded lug 20 is folded into an arc shape corresponding to the curved edge 11.

Referring to fig. 4 to 6, a current collecting tray 100 according to another embodiment of the present utility model is distinguished in that the connecting blocks 30 in the present embodiment are disposed at two opposite ends of the folded edge 21, the bending groove 25 is disposed between the connecting blocks 30 at the two ends, and the bending groove 25 is disposed between the connecting blocks 30 at the two ends, so as to ensure that the middle position of the folded lug 20 is bent to form a shape corresponding to the curved edge 11, and the two ends of the folded lug 20 in the length direction of the folded edge 21 are connected with the substrate 10 through the connecting blocks 30, so that the connection strength between the folded lug 20 and the substrate 10 is improved, and further the impact resistance after bending is improved.

Further, the curved edge 11 between the two connecting blocks 30 is intended to be arranged in a protruding manner near the folded edge 21, so as to ensure that the folded lug 20 is folded into a circular arc shape corresponding to the curved edge 11. In the present embodiment, the bending groove 25 is provided with a wide diameter portion 26 and a narrow diameter portion 27. The wide diameter portions 26 are provided at opposite ends of the bending groove 25 in the longitudinal direction of the folded edge 21, and the narrow diameter portions 27 are provided at intermediate positions of the bending groove 25, the narrow diameter portions 27 corresponding to intermediate positions of the folded edge 21.

Referring to fig. 7, the present utility model further discloses a single battery 200, which includes a battery case 90 and the current collecting plate 100. The battery case 90 is arranged in a hollow cylindrical structure, a containing cavity 95 is arranged in the battery case 90, the containing cavity 95 is arranged in a cylindrical groove, the containing cavity 95 and the battery case 90 are arranged along the same central axis, the containing cavity 95 is used for containing a battery cell (not shown), and the containing cavity 95 is communicated with one end of the battery case 90 so as to load the battery cell into the battery case 90. The current collecting plate 100 is connected with the battery case 90, the current collecting plate 100 covers the accommodating cavity 95 to cover the battery cell in the accommodating cavity 95, the folding lugs 20 of the current collecting plate 100 are attached to the inner side wall of the accommodating cavity 95, and then the current collecting plate 100 is connected and fixed with the battery case 90 by welding.

The working process of the utility model is as follows: bending the joint block 30 to rotate the lug 20 relative to the base plate 10 until the plane of the lug 20 is perpendicular to the plane of the base plate 10, it being understood that ten percent of the movement at ninety degrees with respect to the definition of perpendicular due to the machining error is to be understood as perpendicular; and then the lug 20 is bent by the bending groove 25, so that the lug 20 is bent into a shape corresponding to the bent edge 11, the fitting degree of the lug 20 and the side wall of the accommodating cavity 95 is ensured, and the bending operation of the collecting tray 100 is completed. And then the bent collecting tray 100 is placed in the battery case 90 to cover the accommodating cavity 95, at this time, the folded lug 20 is completely attached to the side wall of the accommodating cavity 95, and then the battery case 90 and the collecting tray 100 are connected and fixed by welding, so that the installation of the battery case is completed.

In summary, compared with the prior art, the embodiment of the utility model provides the current collecting disc 100, which has the following beneficial effects:

the folding lug 20 is connected with the base plate 10 through the connecting block 30, so that the folding lug 20 can not generate internal stress on the base plate 10 in the bending process, the flatness of the base plate 10 is ensured, the folding lug 20 can be bent into a shape corresponding to the bent edge 11 of the base plate 10 by arranging the folded edge 21 and the bent edge 11 at intervals to form a bending groove 25, when the battery shell 90 is placed in, the folding lug 20 can be completely attached to the inside of the battery shell 90, the conductive area between the current collecting disc 100 and the battery shell 90 is improved, the performance of the current collecting disc 100 is improved, gaps are not reserved between the folding lug 20 and the inner wall of the battery shell 90, the welding quality can be ensured, and the yield is improved.

Through the mode with linking piece 30 setting in the intermediate position of hem 21 for bending groove 25 is separated in the both sides of linking piece 30, and the both sides of hem 21 all can buckle, has improved the deflection of hem 21, and then guarantees that hem 21 can be better with the laminating of battery case 90 inner wall, further improves current collecting tray 100 performance and welding quality.

Through the mode of setting up the linking piece 30 at hem 21 both ends for bending groove 25 sets up between the linking piece 30 at both ends, because both ends are fixed at the in-process of buckling to lug 20, improves the connection reliability between lug 20 and base plate 10, and then improves the shock resistance of mass flow disc 100.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (11)

1. A current collecting tray (100), comprising:

-a substrate (10), the substrate (10) having a curved edge (11), the curved edge (11) extending along a periphery of the substrate (10);

a folding lug (20), wherein a folding edge (21) is arranged on one side of the folding lug (20) close to the curved edge (11); and

The connecting block (30) is arranged between the base plate (10) and the folding lug (20), one end of the connecting block (30) is connected with the curved edge (11), and the opposite end is connected with the folding edge (21);

the folding edge, the bending edge and the connecting block jointly form a bending groove (25), and the bending groove (25) is arranged between the base plate (10) and the bending lug (20).

2. The collecting tray (100) according to claim 1, wherein said engaging block (30) is provided at a middle position of said flange (21), and said bending grooves (25) are partitioned on both sides of said engaging block (30) in a length direction of said flange (21).

3. The collecting tray (100) according to claim 2, wherein the distance between the curved edge (11) and the folded edge (21) increases from the extension direction of the folded edge (21).

4. The collecting tray (100) according to claim 1, wherein said engagement blocks (30) are oppositely disposed at both ends of said flange (21), and said bending grooves (25) are disposed between said engagement blocks (30) at both ends.

5. The collecting tray (100) according to claim 4, wherein said curved edge (11) between said engagement blocks (30) at both ends is provided convexly in a direction approaching said folded edge (21).

6. The collecting tray (100) according to claim 5, wherein said bending groove (25) is provided with a wide diameter portion (26) and a narrow diameter portion (27); in the length direction of the folded edge (21), the wide diameter parts (26) are oppositely arranged at two ends of the bending groove (25), the narrow diameter parts (27) are arranged at the middle position of the bending groove (25), and the narrow diameter parts (27) correspond to the middle position of the folded edge (21).

7. The collecting tray (100) according to claim 1, wherein said base plate (10) has a circular straight plate shape, and said curved edge (11) is circularly disposed outside said base plate (10).

8. The collecting tray (100) according to claim 7, wherein said tab (20) has a rectangular straight plate shape, and said folded edge (21) extends in a straight line along a tangential direction of said curved edge (11).

9. The collecting tray (100) according to claim 8, wherein said tabs (20) are provided in at least two, each of said tabs (20) being uniformly spaced around said base plate (10).

10. The collecting tray (100) according to any of claims 1 to 9, wherein the base plate (10), the tab (20) and the engagement block (30) are an integral piece.

11. A single cell (200), characterized by comprising:

a battery case (90), wherein an accommodating cavity (95) is arranged in the battery case (90); and

A collecting tray (100) according to any one of claims 1 to 10; the current collecting disc (100) is connected with the battery case (90), the accommodating cavity (95) is covered by the current collecting disc (100), and the folding lugs (20) of the current collecting disc (100) are attached to the side wall of the accommodating cavity (95).