CN219917508U - Cover plate assembly and battery - Google Patents

Abstract

The utility model relates to the technical field of batteries, in particular to a cover plate assembly and a battery. The cover plate component comprises a connecting piece and a leading-out part, the connecting piece is a round table with a winding core facing, and the leading-out part is a rivet for connecting the pole column and the connecting piece. The mounting hole has been seted up in the middle of the first mass flow disk, is provided with the spacing portion of sawtooth structure in the mounting hole, and connecting portion passes through slot type cooperation with first mass flow disk and is connected, utilizes interference fit to realize closely linking to each other between the two. The connecting part is in contact connection with the first current collecting disc, so that the problem of stress concentration caused by bending of the conventional I-shaped battery cover plate component is effectively avoided, potential safety hazards are effectively reduced, and meanwhile, the connecting structure can improve shaking of the winding core in the shell.

Description

Cover plate assembly and battery

Technical Field

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

Background

With the development of battery technology, cylindrical batteries are widely used. At present, the cylindrical battery is designed in a mode of full lug flattening or multi-lug patting, and the winding core and the cover plate are connected through an integrally formed current collecting disc and a connecting piece in a laser welding and riveting mode respectively.

At present, the large-column battery cover plate assembly adopts an I-shaped integrated structure, after the current collecting disc is welded, the shell can be put into the shell through bending the connecting sheet in the prior art, stress concentration is easy to occur at the bending position, so that cracks are generated in the connecting piece, and the risk of open circuit and short circuit exists after long-term use.

In addition, the diameter and the height of the winding core of the battery have certain size deviation from the design value, certain gaps exist between the two ends of the winding core and the stop frames on two sides of the winding core with smaller diameter or smaller height, the winding core can slightly shake along the axial direction of the shell, and when the battery works in a high-frequency vibration environment, the welding part of the winding core and the current collecting disc is repeatedly extruded and pulled.

Therefore, there is a need for a cover assembly and a battery that solve the technical problems of the prior art to a certain extent.

Disclosure of Invention

The utility model mainly aims to provide a cover plate assembly and a battery, which are used for solving the technical problems that a connecting sheet formed by bending in the prior art is broken inside due to stress concentration, and further the battery is broken and short-circuited in the long-term use process.

The utility model also provides a cover plate assembly for covering the shell of the battery, which comprises a base plate component and a pole, wherein the pole is arranged on one side of the base plate component far away from the shell; the cover plate assembly further comprises a connecting member and a first collecting plate;

the connecting member has a connecting portion and a lead-out portion connected to the connecting portion; the connecting part is arranged on one side of the substrate component close to the shell, and the lead-out part is connected with the pole and the connecting part on the substrate component;

one end of the connecting part, which is far away from the base plate component, is in interference fit with the first current collecting disc.

In the above aspect, further, the connecting member includes a round table capable of serving as the connecting portion and a rivet capable of serving as the lead-out portion;

the rivet can fix the round table and the polar column on two sides of the shell.

In the above technical solution, further, the circular truncated cone has a diverging structure along a direction from the housing to the substrate member.

In the above technical solution, further, a first protrusion is formed at the center of the first collecting disc towards the housing;

the first bulge is provided with a mounting hole which can be sleeved with the round table;

the side wall of the mounting hole is provided with a limiting part, and the limiting part is used for interference fit of the first collecting disc and the round table.

In the above technical solution, further, the limiting portion is a tooth-shaped structure formed along a side wall of the mounting hole at intervals.

In the above technical solution, further, a second protruding portion is formed on the edge of the first current collecting disc towards the housing in a protruding manner, and the second protruding portion is used for connecting with a winding core of the battery;

the second protruding portions are arranged in a plurality, and the second protruding portions are arranged at intervals by taking the first protruding portions as the center.

In the above technical solution, further, the second protruding portion is in a kidney-shaped structure along a radial direction of the first collecting disc, and a first liquid through hole is formed between adjacent second protruding portions.

In the above technical solution, further, the substrate member includes a substrate and an insulator;

the base plate is provided with an explosion-proof valve and a liquid inlet hole at intervals;

an installation cavity is formed in the periphery of one side, facing the shell, of the base plate, and the round table is arranged in the installation cavity and extends out of the installation cavity;

the insulator is arranged between the pole and the substrate.

The utility model also provides a battery, which comprises a second current collecting disc and the cover plate assembly;

the second current collecting disc is arranged between the shell and one side, far away from the cover plate assembly, of the winding core of the battery.

In the above technical solution, further, the center of the second collecting tray has a first recess portion capable of being connected to the housing;

the edge of the second collecting disc is provided with a plurality of second concave parts which are arranged at intervals and can be connected with the winding core by taking the first concave part as the center;

a second liquid through hole is formed in the second collecting disc; the second liquid through holes extend to the first concave part and the second collecting disc respectively along two ends of the second collecting disc in the radial direction.

Compared with the prior art, the utility model has the beneficial effects that:

a cover plate assembly for covering a housing of a battery, the cover plate assembly comprising a base plate member and a pole, the pole being disposed on a side of the base plate member remote from the housing; the cover plate assembly further comprises a connecting member and a first collecting plate;

the connecting member has a connecting portion and a lead-out portion connected to the connecting portion; the connecting part is arranged on one side of the substrate component close to the shell, and the lead-out part is connected with the pole and the connecting part on the substrate component;

one end of the connecting part, which is far away from the base plate component, is in interference fit with the first current collecting disc.

In conclusion, the connecting portion is in contact connection with the first current collecting disc, the problem of stress concentration caused by bending of a conventional I-shaped battery cover plate component is effectively avoided, potential safety hazards are effectively reduced, and meanwhile, the connecting structure can improve shaking of the winding core inside the shell.

In addition, the connecting part bending procedure is omitted, so that the problem of cover closing deviation caused by rebound of the connecting part can be effectively reduced, and the bad sealing phenomenon can be effectively reduced; the shaking of the winding core inside the shell caused by the conventional connecting part is reduced.

The utility model also provides a battery, which comprises a second current collecting disc and the cover plate assembly; the second current collecting disc is arranged between the shell and one side, far away from the cover plate assembly, of the winding core of the battery. The battery includes the cap assembly, and thus has all the advantageous effects of the cap assembly, which are not described in detail herein.

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 is a schematic structural diagram of a cover assembly applied to a battery according to a first embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a cover assembly applied to a winding core of a battery according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a cover plate assembly (with a first collecting tray) according to a first embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a cover plate assembly (without a first collecting tray) according to a first embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a cover plate assembly (without the first collecting tray) according to a first embodiment of the present utility model at a second view angle;

fig. 6 is a schematic structural diagram of a first current collecting tray according to a first embodiment of the present utility model at a first view angle;

fig. 7 is a schematic structural diagram of a first current collecting plate according to a first embodiment of the present utility model under a second view angle;

FIG. 8 is a cross-sectional view of a cover plate assembly according to a first embodiment of the present utility model;

fig. 9 is an enlarged view at a of fig. 8;

fig. 10 is a schematic structural diagram of a battery (hidden case) according to a second embodiment of the present utility model;

fig. 11 is a schematic structural diagram of a second current collecting plate according to a second embodiment of the present utility model under a first view angle;

fig. 12 is a schematic structural diagram of a second current collecting tray according to a second embodiment of the present utility model under a second view angle;

fig. 13 is an exploded view of a battery according to a second embodiment of the present utility model.

Reference numerals:

1-a housing; 2-a substrate member; 3-pole; 5-round bench; 6-rivet; 7-a first collecting tray; 8-a first boss; 9-mounting holes; 10-a limiting part; 11-a second boss; 12-a first liquid through hole; 13-a substrate; 14-an insulator; 15-a sealing gasket; 16-explosion-proof valve; 17-a liquid inlet hole; 18-a mounting cavity; 19-a second manifold disk; 20-a first recess; 21-a second recess; 22-a second liquid through hole; 23-winding cores;

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatus, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent after an understanding of the present disclosure. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but rather, obvious variations may be made upon an understanding of the present disclosure, other than operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided solely to illustrate some of the many possible ways of implementing the methods, devices, and/or systems described herein that will be apparent after understanding the present disclosure.

Throughout the specification, when an element (such as layer, region or substrate 13) is described as being "on," "connected to," bonded to, "on," or "overlying" another element, it may be directly "on," "connected to," bonded to, "on," or "overlying" the other element, or there may be one or more other elements interposed therebetween. In contrast, when an element is referred to as being "directly on," directly connected to, "or" directly coupled to, "another element, directly on," or "directly covering" the other element, there may be no other element intervening therebetween.

As used herein, the term "and/or" includes any one of the listed items of interest and any combination of any two or more. Although terms such as "first," "second," and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, component, region, layer or section discussed in examples described herein could also be termed a second member, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatially relative terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to another element would then be oriented "below" or "lower" relative to the other element.

Thus, the term "above … …" includes both orientations "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. Singular forms also are intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are intended to specify the presence of stated features, integers, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, and/or groups thereof. Variations from the shapes of the illustrations as a result, of manufacturing techniques and/or tolerances, are to be expected. Accordingly, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shapes that occur during manufacture.

The features of the examples described herein may be combined in various ways that will be apparent upon an understanding of the present disclosure. Further, while the examples described herein have a variety of configurations, other configurations are possible as will be apparent after an understanding of the present disclosure.

Example 1

The technical problems that the connecting sheet formed by bending in the prior art is broken inside due to stress concentration, and then the battery is broken and short-circuited in the long-term use process are solved. The present utility model provides a cover plate assembly, and in particular, the cover plate assembly provided by the present utility model is described below with reference to fig. 1 to 9.

In this embodiment, as shown in fig. 1 and 2, a cover assembly is used to cover the case 1 of the battery to seal the winding core 23 to the case 1; the cover assembly comprises a base member 2 and a pole 3, wherein the pole 3 is arranged on one side of the base member 2 away from the housing 1, i.e. the pole 3 is exposed outside the housing 1.

Specifically, the cover plate assembly further comprises a connecting member and a first collecting plate; the connecting member has a connecting portion and a lead-out portion connected to the connecting portion; the connecting part is arranged on one side of the substrate member 2 close to the shell 1 and is connected with the winding core 23 of the battery; one end of the lead-out portion is connected to the connection portion and the other end passes through the substrate member 2 to be connected to the pole 3, that is, the lead-out portion can connect the pole 3 to the connection portion so that the connection portion and the lead-out portion are fixed to the substrate member 2.

Specifically, one end of the connecting portion, which is far away from the base plate member, is in interference fit with the first current collecting disc, and further, the connecting portion and the first current collecting disc adopt a slot type mode.

Specifically, as shown in fig. 4 and 5, the connection member includes a round table 5 and a rivet 6, wherein the round table 5 can be used as a connection portion and the rivet 6 can be used as a lead-out portion; the axis of the round table 5 coincides with the axis of the winding core 23 and the round table 5 extends in the direction of its own axis.

Further, the rivets 6 have an "h" shape, and can fix the round bosses 5 and the poles 3 located on both sides of the base member 2 to the base member 2.

Further, the round table 5 and the rivet 6 are both made of metal materials; the actual electrical connection process is as follows: the winding core 23 is electrically connected with the round table 5, the round table 5 is electrically connected with the rivet 6, the rivet 6 is electrically connected with the pole 3, and further the winding core 23 is electrically connected with the pole 3.

In summary, the connecting part (the round table 5) does not need to be bent and then put into the shell (the bending process of the connecting piece is cancelled), the connecting part and the pole 3 can be directly connected by adopting the rivet 6, so that the conduction between the inside of the battery and the pole 3 is realized, the potential safety hazard caused by the problem of stress concentration caused by bending of the conventional I-shaped battery cover plate component is effectively avoided, namely the connecting part is not damaged due to stress concentration, and the risk of short circuit and open circuit is reduced for the battery.

In addition, the bending process of the connecting piece is omitted, so that the problem of cover closing deviation caused by rebound of the connecting part can be effectively reduced, and the phenomenon of poor sealing can be effectively reduced; the shake of the winding core 23 inside the housing 1 due to the conventional connection portion is reduced.

In this embodiment, as shown in fig. 3, 6 and 7, the center of the first collecting tray 7 is formed with a first boss 8 protruding toward the case 1; the first protruding portion 8 is provided with a mounting hole 9 capable of being sleeved with the round table 5, the side wall of the mounting hole 9 is provided with a limiting portion 10, and the limiting portion 10 can fix the first collecting tray 7 to the round table 5.

In the actual installation process, the round platform 5 passes through the installation hole 9 of the first current collecting disc 7, and under the limiting action of the limiting part 10, the stable connection of the round platform 5 and the first current collecting disc 7 is realized, and the separation of the round platform 5 and the first current collecting disc 7 can be prevented by using the limiting part 10.

Further, the limiting parts 10 are tooth-shaped structures formed at intervals along the side walls of the mounting holes 9, and preferably, the number of the limiting parts 10 is four; note that the saw tooth-like structure here is protruded from the side wall of the mounting hole 9. The round table 5 is used as an inscribed cylinder and is finally limited on the first collecting tray 7 by four limiting parts 10.

Further, the circular truncated cone 5 has a diverging structure along the direction from the housing 1 to the base member 2. In the actual use process, the distance between the limit part 10 with the tooth-shaped structure in the radial direction of the mounting hole 9 is changed, so that the fine adjustment of the insertion depth of the round table 5 according to the opening size of the base plate member 2 and the battery shell 1 can be realized.

In this embodiment, as shown in conjunction with fig. 3, the rim of the first collecting tray 7 is formed with a second protrusion 11 protruding toward the case 1, the second protrusion 11 being for connecting the winding core 23 of the battery.

Specifically, the second protrusions 11 are provided in four, and the four second protrusions 11 are arranged at intervals centering on the first protrusions 8.

Specifically, the second protruding portions 11 have a kidney-shaped structure along the radial direction of the first collecting tray 7, and first liquid passing holes 12 are provided between adjacent second protruding portions 11.

In summary, the first protruding portion 8 and the second protruding portion 11 can facilitate welding of the first current collector and the winding core 23. In the present utility model, the number of the second protrusions 11 and the shape of the second protrusions 11 are not particularly limited, and the number of the second protrusions 11 may be three and the shape may be circular.

In this embodiment, as shown in conjunction with fig. 8 and 9, the substrate member 2 includes a substrate 13 and an insulator 14.

Specifically, the base plate 13 is provided with an explosion-proof valve 16 and a liquid inlet hole 17 at intervals, and when the heat of the battery is too high, the explosion-proof valve 16 can be opened to release pressure; the electrolyte can be injected into the battery through the night sky.

Specifically, the base plate 13 is equipped with the installation cavity 18 towards one side of casing 1 enclosing, and the round platform 5 sets up in the installation cavity 18 and extends installation cavity 18 to guarantee when base plate 13 detains and establish on casing 1, in the round platform 5 can stretch into the electric core, guarantee that round platform 5 can be connected with first mass flow disk 7.

Specifically, the insulator 14 is provided between the pole 3 and the substrate 13.

Specifically, a sealing gasket 15 is further disposed between the base plate 13 and the circular table 5.

Specifically, when the round table 5 is inserted onto the first collecting tray 7, the first liquid passing hole 12 can be also enclosed between the round table 5, the limiting portion 10 and the side wall of the mounting hole 9.

The actual liquid injection process is as follows: the liquid inlet hole 17 is opened, and the electrolyte can sequentially pass through the substrate 13 and the first liquid through hole 12.

Example two

The utility model also provides a battery, which is combined with the drawings from 10 to 13, and comprises the cover plate assembly; the second collecting tray 19 is disposed between the case 1 and the side of the battery core 23 remote from the cap assembly.

Specifically, the center of the second collecting tray 19 has a first recess 20 capable of being connected to the housing 1, the first recess 20 protrudes toward the housing 1, and the first recess 20 is used for welding the second collecting tray 19 and the housing 1; the edge of the second collecting disc 19 is provided with a plurality of second concave parts 21 which are arranged at intervals and can be connected with the winding core 23 by taking the first concave part 20 as the center, the second concave parts 21 are protruded towards the winding core 23, and the second concave parts 21 are used for welding the second collecting disc 19 and the winding core 23.

In addition, the number and specific shape of the first and second concave portions 20 and 21 are not particularly limited in the present utility model.

Specifically, the second collecting tray is provided with a second liquid through hole 22; the second liquid passing holes 22 extend to the first concave portion 20 and the second collecting plate 19 respectively along both ends of the radial direction of the second collecting plate 19.

In summary, the connecting part (the round table 5) in the battery provided by the utility model does not need to be bent and then is put into the shell (the bending process of the connecting piece is cancelled), the connecting part and the pole 3 can be directly connected by adopting the rivet 6, so that the conduction between the inside of the battery and the pole 3 is realized, the potential safety hazard caused by the problem of stress concentration caused by bending of the conventional I-shaped battery cover plate component is effectively avoided, namely the connecting part in the utility model is free from the damage of the connecting part caused by stress concentration, and the risk of short circuit and open circuit is avoided for the battery.

In addition, the bending process of the connecting piece is omitted, so that the problem of cover closing deviation caused by rebound of the connecting part can be effectively reduced, and the phenomenon of poor sealing can be effectively reduced; the shake of the winding core 23 inside the housing 1 due to the conventional connection portion is reduced.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A cover plate assembly for covering a housing of a battery, the cover plate assembly comprising a base plate member and a pole, the pole being disposed on a side of the base plate member remote from the housing; the cover plate assembly is characterized by further comprising a connecting member and a first collecting disc;

the connecting member has a connecting portion and a lead-out portion connected to the connecting portion; the connecting part is arranged on one side of the substrate component close to the shell, and the lead-out part is connected with the pole and the connecting part on the substrate component;

one end of the connecting part, which is far away from the base plate component, is in interference fit with the first current collecting disc.

2. The cover plate assembly according to claim 1, wherein the connecting member includes a circular truncated cone capable of functioning as the connecting portion and a rivet capable of functioning as the lead-out portion;

the rivet can fix the round table and the polar column on two sides of the shell.

3. The cover plate assembly of claim 2 wherein the circular truncated cone has a diverging configuration along a direction from the housing to the base plate member.

4. The cover plate assembly according to claim 3, wherein a center of the first collecting tray is formed with a first boss protruding toward the case;

the first bulge is provided with a mounting hole which can be sleeved with the round table;

the side wall of the mounting hole is provided with a limiting part, and the limiting part is used for interference fit of the first collecting disc and the round table.

5. The cover plate assembly of claim 4, wherein the limiting portions are tooth-like structures formed at intervals along the mounting hole side walls.

6. The cover plate assembly according to claim 5, wherein the rim of the first current collecting plate is formed with a second protrusion protruding toward the case for connecting the winding core of the battery;

the second protruding portions are arranged in a plurality, and the second protruding portions are arranged at intervals by taking the first protruding portions as the center.

7. The cover plate assembly of claim 6, wherein the second bosses are of a kidney-shaped configuration along a radial direction of the first manifold disk and have first fluid passage holes between adjacent second bosses.

8. The cover plate assembly of claim 2, wherein the base plate member comprises a base plate and an insulator;

the base plate is provided with an explosion-proof valve and a liquid inlet hole at intervals;

an installation cavity is formed in the periphery of one side, facing the shell, of the base plate, and the round table is arranged in the installation cavity and extends out of the installation cavity;

the insulator is arranged between the pole and the substrate.

9. A battery comprising a second current collecting tray and the cap plate assembly of any one of claims 1 to 8;

the second current collecting disc is arranged between the shell and one side, far away from the cover plate assembly, of the winding core of the battery.

10. The battery of claim 9, wherein the center of the second current collecting plate has a first recess connectable to the case;

the edge of the second collecting disc is provided with a plurality of second concave parts which are arranged at intervals and can be connected with the winding core by taking the first concave part as the center;

a second liquid through hole is formed in the second collecting disc; the second liquid through holes extend to the first concave part and the second collecting disc respectively along two ends of the second collecting disc in the radial direction.