Battery cell cover plate, battery cell and battery pack

Abstract

The utility model provides a battery cell cover plate, a battery cell and a battery pack, and belongs to the field of battery structures. The battery cell cover plate comprises a plate body assembly which forms a cavity, and the top end and the bottom end of the cavity in the height direction are respectively provided with an anti-explosion valve and a plurality of through holes; a cavity is formed in the bottom end of the plate body assembly, the buckles are arranged in the cavity and are correspondingly connected with the plate body assembly in a clamped mode, each buckle is provided with a shielding part, and the projection, at the bottom end of the cavity, of each shielding part can completely cover the corresponding through hole. Therefore, the electrolyte flowing into the cavity from the through hole cannot directly impact on the explosion-proof valve, namely, the impact of the electrolyte on the explosion-proof valve can be greatly weakened through the shielding part of the buckle, so that the explosion-proof valve is effectively prevented from being damaged, and the use safety of the battery cell is ensured. In addition, the buckle is correspondingly connected with the plate body assembly in a clamping mode, so that the stability of the buckle after assembly can be guaranteed, and the anti-impact effect of the shielding part can be achieved.

Description

Technical Field

[0001] The present application relates to the field of battery structures, and in particular to a battery cover, a battery cell and a battery pack. Background Art

[0002] like Figure 1 As shown, in the existing battery cell, a cavity is formed between the end plate of the battery cell cover and the explosion-proof valve, and the electrolyte inside the battery cell will gather in the cavity through the through hole on the end plate. When the battery cell is shaken by external influences, the electrolyte in the cavity will also shake, so that the electrolyte will continuously impact the explosion-proof valve, which can easily cause damage to the explosion-proof valve, and cause battery cell leakage, premature opening of the explosion-proof valve, and other situations that affect the safety performance of the battery cell. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a battery cover, a battery cell and a battery pack to solve the problem that the electrolyte in the cavity of the existing battery cover can easily cause damage to the explosion-proof valve and affect the safety performance of the battery cell.

[0004] According to a first aspect of the present utility model, a battery cell cover is provided, wherein the battery cell cover comprises:

[0005] A plate assembly is formed with a cavity, wherein the top and bottom ends of the cavity in the height direction are respectively provided with an explosion-proof valve and a plurality of through holes; and

[0006] A plurality of snap buckles are arranged in the cavity and correspondingly snap-connected with the plate assembly, each of the snap buckles is formed with a shielding portion, and the projection of the shielding portion at the bottom end of the cavity can completely cover the through hole.

[0007] Preferably, the buckle comprises a shielding plate, and the bottom of the shielding plate facing the through hole is formed as the shielding portion.

[0008] Preferably, the buckle further includes a snap-on portion, which is connected to the top of the shielding plate away from the through hole; the snap-on portion includes two hooks, which are arranged at both ends of the extending direction of the shielding plate.

[0009] Preferably, the hook includes a first connecting plate, a second connecting plate and a third connecting plate connected in sequence; the first connecting plate is vertically connected to the shielding plate, the second connecting plate is vertically connected to the first connecting plate, and the third connecting plate is parallel to the first connecting plate.

[0010] Preferably, the plate assembly includes a first end plate, an insulating member and a second end plate connected in sequence, the explosion-proof valve is arranged at the first end plate, the through hole is arranged at the second end plate, and the buckle is correspondingly engaged with the insulating member.

[0011] Preferably, a clamping groove is formed on the top of the insulating part facing the first end plate, and a through hole penetrating the insulating part is formed at the bottom of the clamping groove.

[0012] Preferably, when the buckle is clamped with the insulating part, the shielding plate is located at the bottom of the insulating part, the first connecting plate is attached to the outer wall of the clamping groove, the second connecting plate is attached to the top of the insulating part, and the third connecting plate is attached to the inner wall of the clamping groove.

[0013] Preferably, a plurality of concave parts corresponding to the second connecting plates one by one are formed on the top of the insulating part; when the buckle is correspondingly clamped with the insulating part, the top of the second connecting plate away from the shielding plate is flush with the top of the insulating part.

[0014] According to a second aspect of the present invention, a battery cell is provided, wherein the battery cell is provided with the battery cell cover plate as described above.

[0015] According to a third aspect of the present invention, a battery pack is provided, wherein the battery pack is provided with the battery cell as described above.

[0016] According to the battery cell cover plate, battery cell and battery pack of the present invention, a buckle is inserted into the cavity of the plate body assembly. The buckle is formed with a shielding part, and the projection of the shielding part at the bottom end of the cavity can completely cover the through hole, so that the electrolyte flowing into the cavity through the through hole will not directly impact on the explosion-proof valve. That is, the impact of the electrolyte on the explosion-proof valve can be greatly weakened by the shielding part of the buckle, and further the explosion-proof valve is effectively prevented from being damaged to ensure the use safety of the battery cell. In addition, the buckle in the present invention is correspondingly connected with the plate body assembly in a clamping manner, so that the stability of the buckle after assembly can be ensured, which is beneficial to realizing the anti-impact effect of the shielding part.

[0017] In order to make the above objects, features and advantages of the present application more obvious and understandable, the following specific embodiments are given and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is a schematic diagram of a battery cell cover plate in the prior art;

[0020] Figure 2 is an exploded view of a battery cell cover plate according to an embodiment of the present invention;

[0021] Figure 3 is another exploded view of the cell cover plate according to an embodiment of the present utility model;

[0022] Figure 4 is a partial schematic view of the buckle and the insulating member according to an embodiment of the present utility model.

[0023] Icons: 1 - first end plate; 10 - explosion-proof valve; 2 - insulating member; 20 - clamping groove; 21 - through hole; 22 - recess; 3 - second end plate; 30 - through hole; 4 - buckle; 40 - shielding plate; 41 - first connecting plate; 42 - second connecting plate; 43 - third connecting plate. Detailed embodiments

[0024] The following detailed embodiments are provided to assist the reader in obtaining a comprehensive understanding of the methods, devices, and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein, but rather, changes that will be apparent after understanding the disclosure of the present application may be made, except for operations that must occur in a specific order. Additionally, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

[0025] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only 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 disclosure of the present application.

[0026] Throughout the specification, when an element (such as a layer, region, or substrate) is described as "on" another element, "connected to" another element, "coupled to" another element, "above" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "coupled to" another element, "above" another element, or "covering" another element, or there may be one or more other elements therebetween. In contrast, when an element is described as "directly on" another element, "directly connected to" another element, "directly coupled to" another element, "directly above" another element, or "directly covering" another element, there may be no other elements therebetween.

[0027] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0028] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or sections, these components, elements, regions, layers, or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or section from another. Thus, a first component, element, region, layer, or section as referred to in the examples described herein may also be referred to as a second component, element, region, layer, or section without departing from the teachings of the examples.

[0029] For ease of description, spatial relationship terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another as shown in the figures. Such spatial relationship terms are intended to include 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, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientation of "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relationship terms used herein will be interpreted accordingly.

[0030] The terms used herein are only for describing various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "comprises", "comprising", and "having" list the stated features, quantities, operations, components, elements, and / or combinations thereof that exist, but do not preclude the existence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0031] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the figures may occur. Thus, the examples described herein are not limited to the specific shapes shown in the figures, but include changes in shape that occur during manufacturing.

[0032] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Additionally, although the examples described herein have a variety of configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0033] According to a first aspect of the present utility model, there is provided a battery cell cover plate, as Figures 2 to 4As shown, the cell cover in this embodiment includes a plate assembly and a plurality of buckles 4 corresponding to the plate assembly, and each buckle 4 is formed with a shielding portion to reduce the impact force of the electrolyte on the explosion-proof valve 10, thereby avoiding the explosion-proof valve 10 from opening prematurely. In the following, the specific structure of the above-mentioned parts of the cell cover according to the utility model will be described in detail.

[0034] In this embodiment, the plate assembly includes a first end plate 1, an insulating member 2 and a second end plate 3 connected in sequence, and a cavity is formed between the first end plate 1 and the second end plate 3; further, an explosion-proof valve 10 is provided at the first end plate 1, and a plurality of through holes 30 are provided at the second end plate 3, and the explosion-proof valve 10 and the plurality of through holes 30 are respectively located at the top and bottom of the height direction of the cavity. A snap-fit ​​groove 20 is formed on the top of the insulating member 2 facing the first end plate 1, and a through hole 21 penetrating the insulating member 2 is formed at the bottom of the snap-fit ​​groove 20 to ensure the permeability of the cavity. It should be noted that the above-mentioned structures of the plate assembly belong to the conventional structures of existing battery cells, and therefore will not be described in detail.

[0035] like Figures 2 to 4 As shown, the buckle 4 in this embodiment is arranged in the cavity of the plate assembly and is correspondingly engaged with the insulating member 2. When the buckle 4 is correspondingly engaged with (the engaging groove 20 of) the insulating member 2, the projection of its shielding portion at the bottom end of the cavity (i.e., the projection at the second end plate 3) can completely cover the through hole 30, which is conducive to achieving its shielding effect on the electrolyte.

[0036] Specifically, Figure 4 As shown, the buckle 4 includes a shielding plate 40 formed into a rectangular plate-like structure, and the bottom of the shielding plate 40 facing the through hole 30 is formed as the above-mentioned shielding portion. The buckle 4 also includes a clamping portion connected to the top of the shielding plate 40 away from the through hole 30. More specifically, the clamping portion includes two hooks, and the two hooks are arranged at both ends of the shielding plate 40 in the extension direction, that is, the two hooks are arranged along the width direction of the insulating member 2.

[0037] Furthermore, the hook includes a first connecting plate 41, a second connecting plate 42 and a third connecting plate 43 connected in sequence; the first connecting plate 41 is vertically connected to the shielding plate 40, the second connecting plate 42 is vertical to the first connecting plate 41, and the third connecting plate 43 is parallel to the first connecting plate 41. When the buckle 4 is engaged with the insulating member 2, the shielding plate 40 is located at the bottom of the insulating member 2, the first connecting plate 41 is in contact with the outer wall of the engaging groove 20 (i.e., the two ends in the width direction of the insulating member 2), the second connecting plate 42 is in contact with the top of the insulating member 2, and the third connecting plate 43 is in contact with the inner wall of the engaging groove 20 (the two ends in the width direction). In this way, the corresponding engagement of the buckle 4 and the insulating member 2 is achieved.

[0038] Furthermore, in order to improve the stability during the snap connection of the snap 4 and enhance the stability of the overall structure of the cell cover plate, a plurality of concave portions 22 corresponding to the second connecting plates 42 one by one are provided on the top of the insulating member 2. That is, when the snap 4 is correspondingly snap-connected to the insulating member 2, the top of the second connecting plate 42 away from the shielding plate 40 is flush with the top of the insulating member 2.

[0039] It should be noted that there are no specific limitations on the material and formation method of the snap 4, as long as the above technical effects can be achieved. Preferably, the thickness of the snap 4 is 0.1 mm to 0.2 mm to ensure the strength and stiffness of its own structure.

[0040] Through the cell cover plate according to the present invention as described above, a snap 4 is inserted into the cavity of the plate assembly. The snap 4 is formed with a shielding portion, and the projection of the shielding portion at the bottom end of the cavity can completely cover the through hole 30. Thus, the electrolyte flowing into the cavity through the through hole 30 will not directly impact on the explosion-proof valve 10. That is, the impact of the electrolyte on the explosion-proof valve 10 can be greatly weakened by the shielding portion of the snap 4, thereby effectively avoiding damage to the explosion-proof valve 10 and ensuring the use safety of the cell. In addition, the snap 4 in the present invention is correspondingly connected to the plate assembly by a snap connection method, so that the stability of the snap 4 after assembly can be ensured, which is beneficial to realizing the anti-impact effect of the shielding portion.

[0041] In addition, according to a second aspect of the present invention, a cell is provided, wherein the cell is provided with the cell cover plate as described above.

[0042] In addition, according to a third aspect of the present invention, a battery pack is provided, wherein the battery pack is provided with the cell as described above.

[0043] Finally, it should be noted that the above embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, rather than limiting them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present application can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be defined by the protection scope of the claims.

Claims

1. A battery cell cover, characterized in that: The battery cover plate comprises: A plate assembly is formed with a cavity, wherein the top and bottom ends of the cavity in the height direction are respectively provided with an explosion-proof valve and a plurality of through holes; and A plurality of snap buckles are arranged in the cavity and correspondingly snap-connected with the plate assembly, each of the snap buckles is formed with a shielding portion, and the projection of the shielding portion at the bottom end of the cavity can completely cover the through hole.

2. The cell cover plate according to claim 1, characterized in that: The buckle includes a shielding plate, and the shielding plate faces the bottom of the through hole to form the shielding portion.

3. The cell cover plate according to claim 2, characterized in that: The buckle further includes a clamping portion, which is connected to the top of the shielding plate away from the through hole; the clamping portion includes two hooks, which are arranged at both ends of the shielding plate in the extension direction.

4. The cell cover plate according to claim 3, characterized in that: The hook includes a first connecting plate, a second connecting plate and a third connecting plate connected in sequence; the first connecting plate is vertically connected to the shielding plate, the second connecting plate is vertically connected to the first connecting plate, and the third connecting plate is parallel to the first connecting plate.

5. The cell cover plate according to claim 4, characterized in that: The plate assembly includes a first end plate, an insulating member, and a second end plate connected in sequence, the explosion-proof valve is arranged at the first end plate, the through hole is arranged at the second end plate, and the buckle is correspondingly engaged with the insulating member.

6. The cell cover plate according to claim 5, characterized in that: A clamping groove is formed on the top of the insulating member facing the first end plate, and a through hole penetrating the insulating member is formed on the bottom of the clamping groove.

7. The cell cover plate according to claim 6, characterized in that: When the buckle is engaged with the insulating member, the shielding plate is located at the bottom of the insulating member, the first connecting plate is fitted with the outer wall of the engaging groove, the second connecting plate is fitted with the top of the insulating member, and the third connecting plate is fitted with the inner wall of the engaging groove.

8. The cell cover plate according to claim 7, characterized in that: The top of the insulating member is formed with a plurality of recesses corresponding to the second connecting plates one by one; when the buckle is correspondingly engaged with the insulating member, the second connecting plate is away from the top of the shielding plate and is flush with the top of the insulating member.

9. A battery cell, characterized in that: The battery cell is provided with a battery cell cover according to any one of claims 1 to 8.

10. A battery pack, characterized in that: The battery pack is provided with the battery cell as claimed in claim 9.

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