Cover plate structure and battery

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to a cover plate structure and a battery, and the cover plate structure comprises a cover plate, a pole and a connecting piece. One side, facing the pole group, of the cover plate is provided with an insulating part, and the pole penetrates through the first through hole of the cover plate. The connecting piece is located on the side, facing the pole group, of the cover plate, the connecting piece is provided with a first connecting part and a second connecting part, the pole lug of the pole group is clamped between the first connecting part and the insulating part, the first connecting part is electrically connected with the pole lug, and the second connecting part is electrically connected with the pole column. The cover plate structure can reduce the overall height of the pole, the connecting piece and the tab, so that the occupation of the height space of the battery can be reduced, and the utilization rate of the internal space of the battery can be improved. The battery comprises a pole group, a shell and the cover plate structure, the cover plate covers the opening of the shell in a sealing manner to form a shell of the battery, and the pole group is arranged in the shell. The battery has a higher internal space utilization rate.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage equipment technical field especially relates to a cover plate structure and battery. BACKGROUND

[0002] The cover plate structure of battery generally includes connecting piece, and the connecting piece is used for connecting the pole lug of pole and pole group, and has the conductive function. The existing battery generally places the connecting piece and the pole lug integrally below the pole base, that is, the pole, the connecting piece and the pole lug are sequentially arranged along the height direction of the battery, and this arrangement increases the occupation of the height space of the battery, and is not conducive to the improvement of the internal space utilization rate of the battery. UTILITY MODEL CONTENTS

[0003] One purpose of the utility model is to provide a cover plate structure, which can reduce the occupation of the internal height space of the battery and is conducive to the improvement of the internal space utilization rate of the battery.

[0004] To achieve this purpose, the utility model adopts the following technical scheme:

[0005] A cover plate structure is provided, which comprises:

[0006] A cover plate, which has an insulating part on the side facing the pole group;

[0007] A pole, which is arranged in the first through hole of the cover plate;

[0008] A connecting piece, which is arranged on the side of the cover plate facing the pole group, and has a first connecting part and a second connecting part, the pole lug of the pole group is clamped between the first connecting part and the insulating part, the first connecting part is electrically connected with the pole lug, and the second connecting part is electrically connected with the pole.

[0009] Optionally, an insulating piece is further arranged between the connecting piece and the pole group, and the insulating piece is provided with a second through hole, and the pole lug is connected to the connecting piece through the second through hole.

[0010] Optionally, the side of the insulating piece facing the pole group has a first inclined surface, the pole lug has a folding part, the folding part has a second inclined surface, and the first inclined surface is attached to the second inclined surface.

[0011] Optionally, the insulating piece has a side edge, the side edge extends towards the cover plate, and the side edge can prevent the pole lug from contacting the shell of the battery.

[0012] Optionally, the first connecting part is provided with a avoiding groove, and the end of the pole lug is connected to the side of the first connecting part away from the pole group through the avoiding groove.

[0013] Optionally, the plane where the first connecting part is located is parallel to the plane where the second connecting part is located, and the vertical distance between the first connecting part and the body is smaller than the vertical distance between the second connecting part and the body.

[0014] Optionally, the sealing member further comprises a welding layer, and the welding layer is welded to the cover plate.

[0015] Optionally, the sealing member further comprises a welding layer, and the welding layer is welded to the cover plate.

[0016] Optionally, the insulation part is provided with a limiting groove, and the tab is located in the limiting groove.

[0017] Another purpose of the utility model is to provide a battery with higher internal space utilization.

[0018] To achieve the purpose, the utility model adopts the following technical scheme.

[0019] The utility model provides a battery, including pole group, shell and above-mentioned cover plate structure, the cover plate seal cover is located at the opening of shell to form the shell of battery, and the pole group is arranged in the shell.

[0020] The utility model has the advantages of:

[0021] The utility model provides a cover plate structure, including cover plate, pole and connecting piece, wherein the side of cover plate towards pole group has insulation part, and pole is arranged in the first through hole of cover plate.

[0022] The utility model further provides a battery, including pole group, shell and above-mentioned cover plate structure, and the cover plate seal cover is located at the opening of shell to form the shell of battery, and the pole group is arranged in the shell. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1Is the structural schematic diagram of the battery provided by the embodiment of the utility model;

[0024] Figure 2 Is the partial structure explosion map of the battery provided by the embodiment of the utility model;

[0025] Figure 3 Is the structural schematic diagram of the insulating piece (with inclined plate) provided by the embodiment of the utility model;

[0026] Figure 4 Is the partial structure sectional view of the battery provided by the embodiment of the utility model.

[0027] In the drawing,

[0028] 1, cover plate;11, sealing piece;111, insulating layer;112, welding layer;12, third through hole;

[0029] 2, pole;

[0030] 3, connecting piece;31, first connecting part;311, avoiding groove;32, second connecting part;33, bending connecting part;

[0031] 4, insulating piece;41, second through hole;42, side edge;43, inclined plate;

[0032] 100, cover plate structure;

[0033] 200, pole group;201, tab;211, end part;212, folding part;2121, second inclined surface;

[0034] 300, shell;400, inner insulating film;500, supporting plate. DETAILED DESCRIPTION

[0035] The technical scheme of the utility model will be further described below in combination with the drawings and embodiments.It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model.In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings, not all.

[0036] In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, and can be detachable connection;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements.For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0037] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under", can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them.Moreover, first feature is on, above and on second feature, includes that first feature is directly above and obliquely above second feature, or only indicates that first feature is higher than second feature in horizontal height.

[0038] The cover plate structure of the battery generally comprises a connecting piece for connecting the pole and the tab of the pole group, and has a conductive function. The existing battery generally places the connecting piece and the tab integrally below the pole base, that is, the pole, the connecting piece and the tab are arranged in sequence along the height direction of the battery. This arrangement increases the occupation of the height space of the battery, which is not conducive to improving the utilization rate of the internal space of the battery.

[0039] As shown in Figures 1-4 , the embodiment provides a cover plate structure to solve the above problems.

[0040] The cover plate structure comprises a cover plate 1, a pole 2 and a connecting piece 3. The side of the cover plate 1 facing the pole group 200 has an insulating part, and the pole 2 is arranged in the first through hole of the cover plate 1. The connecting piece 3 is located on the side of the cover plate 1 facing the pole group 200, and the connecting piece 3 has a first connecting part 31 and a second connecting part 32. The tab 201 of the pole group 200 is clamped between the first connecting part 31 and the insulating part, and the first connecting part 31 is electrically connected with the tab 201, and the second connecting part 32 is electrically connected with the pole 2.

[0041] The cover plate structure arranges the pole 2 and the tab 201 in a staggered manner, the pole 2 corresponds to the first through hole of the cover plate 1, the tab 201 corresponds to the insulating part of the cover plate 1, and the tab 201 is accommodated between the insulating part and the connecting piece 3, that is, the pole 2 and the tab 201 are connected to the same side of the connecting piece 3. Compared with the prior art in which the pole 2 and the tab 201 are connected to the two sides of the connecting piece 3, the overall height of the pole 2, the connecting piece 3 and the tab 201 can be reduced, that is, the occupation of the height space of the battery can be reduced, which is conducive to improving the utilization rate of the internal space of the battery.

[0042] Optionally, the first connecting part 31 is provided with a avoiding slot 311, and the end 211 of the tab 201 is connected to the side of the first connecting part 31 away from the pole group 200 through the avoiding slot 311, that is, the end 211 of the tab 201 is clamped between the first connecting part 31 and the insulating part of the cover plate 1, so as to ensure that the tab 201 and the first connecting part 31 are in electrical conduction while maintaining an insulating state with the body of the cover plate 1.

[0043] Optionally, in the embodiment, the tab 201 is divided into two parts, the first connecting part 31 is in U-shaped structure, the middle part of the U-shaped structure is the avoiding slot 311, both parts of the tab 201 pass through the avoiding slot 311 in the middle part, and then are respectively folded towards the two sides of the U-shaped structure, and the two parts of the tab 201 are respectively connected with the two side branches of the U-shaped structure.

[0044] Of course, in other embodiments, the tab 201 can also be provided as a whole, the avoiding slot 311 is provided on one side of the first connecting part 31, the tab 201 passes through the avoiding slot 311 and is folded towards the other side of the first connecting part 31, and is connected with the first connecting part 31 as a whole. Or the tab 201 is provided as two parts, and the avoiding slots 311 are provided on both sides of the first connecting part 31, the two parts of the tab 201 pass through the avoiding slots 311 on both sides, are respectively folded, and are connected with the first connecting part 31 in the middle part. The number of the tab 201 and the structure of the avoiding slot 311 can also be adjusted to other forms, which will not be described here.

[0045] The pole 2 protrudes the cover plate 1 towards the end face of the pole group 200, in order to shorten the distance between the end face of the pole group 200 and the cover plate 1, and further reduce the occupied height of the cover plate structure in the battery, the end face of the pole 2 towards the pole group 200 is closer to the pole group 200 than the end face of the insulating part, that is, the first connecting part 31 and the second connecting part 32 are not at the same height, so that the space between the insulating part and the end face of the pole group 200 is larger. Therefore, optionally, in the embodiment, the first connecting part 31 and the second connecting part 32 are both in plate-shaped structure, the plane where the first connecting part 31 is located and the plane where the second connecting part 32 is located are both parallel to the body of the cover plate 1, the vertical distance between the first connecting part 31 and the body is smaller than the vertical distance between the second connecting part 32 and the body, so as to adapt to the design that the end face of the pole 2 and the end face of the insulating part are not at the same height. Therefore, the connecting piece 3 further comprises a bending connecting part 33, which is used to connect the first connecting part 31 and the second connecting part 32.

[0046] Optionally, in the embodiment, the cover plate 1 comprises a sealing piece 11, the sealing piece 11 comprises an insulating layer 111, a third through hole 12 is provided on the cover plate 1, the sealing piece 11 seals the third through hole 12, and the insulating layer 111 is provided towards the tab 201 to form the insulating part. Of course, in other embodiments, the insulating layer 111 can also be directly provided in a small area of the end face of the cover plate 1 towards the pole group 200, but it is necessary to ensure that the insulating layer 111 can completely cover the position where the tab 201 is located.

[0047] Optionally, in the embodiment, the sealing member 11 further comprises a welding layer 112 welded to the cover plate 1. The welding layer 112 is attached to the insulating layer 111, and the welding layer 112 has a size larger than that of the insulating layer 111, i.e., the side surface of the welding layer 112 protrudes beyond the side surface of the insulating layer 111. Optionally, the welding layer 112 is made of the same material as the body of the cover plate 1.

[0048] Optionally, the insulating portion is provided with a limiting groove, and the tab 201 is located in the limiting groove, which can limit the relative position of the tab 201 and the sealing member 11 to a certain extent and fix the tab 201.

[0049] Optionally, the cover plate structure further comprises an insulating member 4 clamped between the connecting member 3 and the electrode group 200. The insulating member 4 is provided with a second through hole 41, and the tab 201 passes through the second through hole 41 and is connected to the connecting member 3.

[0050] Optionally, one side of the insulating member 4 facing the electrode group 200 has a first inclined surface, and the tab 201 has a folding portion 212 provided with a second inclined surface 2121. The first inclined surface is attached to the second inclined surface 2121, i.e., the first inclined surface has a shaping effect on the tab 201.

[0051] Optionally, the insulating member 4 comprises an inclined plate 43 having an inclined angle with the body of the insulating member 4. One side of the inclined plate 43 is connected to the body of the insulating member 4, and the other side has a gap with the body of the insulating member 4, which is the second through hole 41. The side of the inclined plate 43 facing the tab 201 is the first inclined surface. Of course, in other embodiments, the inclined plate 43 can not be provided, and the second through hole 41 can be provided.

[0052] Optionally, the insulating member 4 has a side edge 42 surrounding the body of the insulating member 4. The body is plate-shaped, and the plane where the body is located is parallel to the plane where the cover plate 1 is located. The side edge 42 extends toward the cover plate 1, and can prevent the tab 201 from contacting the shell 300 of the battery and support the shell 300 to improve the structural strength at this position. Optionally, the side edge 42 is perpendicular to the body of the insulating member 4.

[0053] Optionally, the cover plate structure is provided with two positive and negative electrode posts 2, and two connecting members 3 are correspondingly provided. Two insulating portions are correspondingly provided on the cover plate 1, and the positive and negative tabs of the electrode group 200 are connected to the two connecting members 3. Optionally, the insulating member 4 is an integral whole and covers the area where the positive and negative tabs are located. Optionally, the four side edges 42 of the insulating member 4 are attached to the four inner side surfaces of the shell 300.

[0054] Optionally, the cover plate structure further comprises an explosion-proof assembly provided on the cover plate 1, and the insulating member 4 is provided with an explosion-proof through hole.

[0055] The embodiment also provides a battery, which comprises the pole group 200, the shell 300 and the cover plate structure, the cover plate 1 sealing cover is arranged on the opening of the shell 300 to form the shell of the battery, and the pole group 200 is arranged in the shell.

[0056] Optionally, the battery further comprises an inner insulation film 400, which is sleeved on the pole group 200.

[0057] Optionally, in the embodiment, the battery further comprises a supporting plate 500, which is arranged at the bottom of the pole group 200 and is clamped between the bottom surface of the pole group 200 and the shell 300. Of course, in other embodiments, the supporting plate 500 can also not be arranged.

[0058] The battery can reduce the overall height of the pole 2, the connecting piece 3 and the tab 201 by arranging the pole 2 and the tab 201 in a staggered manner, the pole 2 corresponding to the first through hole of the cover plate 1, the tab 201 corresponding to the insulation part of the cover plate 1, and the tab 201 being accommodated between the insulation part and the connecting piece 3, that is, the pole 2 and the tab 201 are connected to the same side of the connecting piece 3, so that the occupation of the height space of the battery can be reduced, and therefore the battery has a higher internal space utilization rate.

[0059] Obviously, the above embodiment of the utility model is only an example for clearly explaining the utility model, and is not a limitation on the embodiment of the utility model. For ordinary skilled in the art, other different forms of changes or changes can be made on the basis of the above description. Here, all the embodiments are not required or can not be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A cover plate structure, characterized in that, include: Cover plate (1), the cover plate (1) having an insulating portion on the side facing the pole group (200); The pole (2) is inserted through the first through hole of the cover plate (1); A connector (3) is located on the side of the cover plate (1) facing the electrode assembly (200). The connector (3) has a first connecting part (31) and a second connecting part (32). The electrode tab (201) of the electrode assembly (200) is sandwiched between the first connecting part (31) and the insulating part. The first connecting part (31) is electrically connected to the electrode tab (201), and the second connecting part (32) is electrically connected to the pole post (2).

2. The cover plate structure according to claim 1, characterized in that, It also includes an insulating component (4), which is sandwiched between the connector (3) and the electrode assembly (200). The insulating component (4) has a second through hole (41), and the electrode tab (201) passes through the second through hole (41) and is connected to the connector (3).

3. The cover plate structure according to claim 2, characterized in that, The insulating member (4) has a first inclined surface on the side facing the pole group (200), the pole tab (201) has a closing portion (212), the closing portion (212) has a second inclined surface (2121), and the first inclined surface is attached to the second inclined surface (2121).

4. The cover plate structure according to claim 2, characterized in that, The insulating member (4) has a side (42) extending toward the cover plate (1), which prevents the tab (201) from contacting the battery casing (300).

5. The cover plate structure according to any one of claims 1-4, characterized in that, The first connecting part (31) has a relief groove (311), and the end (211) of the electrode tab (201) passes through the relief groove (311) and is connected to the side of the first connecting part (31) away from the electrode group (200).

6. The cover plate structure according to any one of claims 1-4, characterized in that, The plane where the first connecting part (31) is located and the plane where the second connecting part (32) is located are both parallel to the body of the cover plate (1), and the vertical distance between the first connecting part (31) and the body is less than the vertical distance between the second connecting part (32) and the body.

7. The cover plate structure according to any one of claims 1-4, characterized in that, The cover plate (1) includes a sealing element (11), the sealing element (11) includes an insulating layer (111), the cover plate (1) has a third through hole (12), the sealing element (11) blocks the third through hole (12), and the insulating layer (111) is disposed toward the tab (201) to form the insulating part.

8. The cover plate structure according to claim 7, characterized in that, The seal (11) further includes a weld layer (112) which is welded to the cover plate (1).

9. The cover plate structure according to any one of claims 1-4, characterized in that, The insulating part has a limiting groove, and the electrode (201) is located in the limiting groove.

10. A battery, characterized in that, The battery includes an electrode assembly (200), a housing (300), and a cover structure as described in any one of claims 1-9, wherein the cover (1) seals the opening of the housing (300) to form the outer casing of the battery, and the electrode assembly (200) is disposed within the outer casing.

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