Long battery cell structure

Abstract

The utility model provides a long battery cell structure and relates to the field of battery cell structures. The long battery cell structure comprises a pole group assembly which is at least provided with a first pole group and a second pole group which are connected in sequence; the protection assembly comprises a supporting part, the supporting part is of a similar H-shaped structure, two open spaces and a through hole are formed in the supporting part, the first pole group and the second pole group are correspondingly arranged in the open spaces respectively, and tabs of the first pole group and tabs of the second pole group are connected through the through hole; and the pole group assembly and the protection assembly are correspondingly connected and then are arranged in the shell assembly.

Description

Technical Field

[0001] The present application relates to the field of battery cell structures, and more particularly to a long battery cell structure. Background Art

[0002] In existing long battery cells, the length of the electrode assembly is also relatively large, so it often appears bending deformation and other situations, and the manufacturing difficulty is relatively large; in addition, due to the large length of the electrode assembly and the poor support effect of the existing long battery cells on the electrode assembly, the electrode assembly is prone to damage during movement. Summary of the Utility Model

[0003] In view of this, the purpose of the present application is to provide a long battery cell structure to solve the problems of relatively large manufacturing difficulty of the electrode assembly in existing long battery cells and easy damage due to lack of support.

[0004] According to the above purpose, the present utility model provides a long battery cell structure, wherein the long battery cell structure includes:

[0005] An electrode assembly, at least provided with a first electrode group and a second electrode group connected in sequence;

[0006] A protection assembly, including a support part, including a support part formed in a shape similar to an H-shaped structure, the support part is formed with two open spaces and through holes, the first electrode group and the second electrode group are respectively disposed in the open spaces, and the tabs of the first electrode group and the tabs of the second electrode group are connected through the through holes; and

[0007] A housing assembly, the electrode assembly and the protection assembly are disposed inside the housing assembly after being correspondingly connected.

[0008] Preferably, the support part includes two side plates, the side plates include a support plate and support columns connected to the support plate; the support plate extends in a first direction, the support columns extend in a second direction, and the first direction and the second direction are perpendicular, so that the side plates are formed in a shape similar to a T-shaped structure.

[0009] Preferably, along the first direction, a plurality of avoidance recesses are respectively formed on both sides of the support plate, and the plurality of avoidance recesses located on the same side of the support plate are spaced apart along the first direction.

[0010] Preferably, the support column is formed in a shape similar to a cuboid column structure and a cavity is formed inside the support column, the support column is formed with a sub-through hole; along the first direction, the sub-through hole penetrates the opposite side parts of the support column and the sub-through hole penetrates the first end of the support column far from the support plate, so that the sub-through hole is formed in a shape similar to a U-shaped structure.

[0011] Preferably, after the support part and the pole group assembly are correspondingly assembled, the two sub-through holes on the two support columns jointly form the through hole; the support plate is attached to both sides of the first pole group and the second pole group in the length direction, and the through hole is correspondingly adapted to the pole lug.

[0012] Preferably, along the first direction, the thickness of the support column is formed as W, 6mm < W < 15mm; along the second direction, the length of the support column is formed as H, and the distance between the inner walls of the two support plates is formed as C, H ≤ C / 2.

[0013] Preferably, the protection assembly further includes an insulating film.

[0014] Preferably, the housing assembly includes a main housing and a cover plate assembly, and the cover plate assembly is assembled with the main housing through concave-convex cooperation.

[0015] Preferably, along the first direction, two explosion-proof valves are provided on one side of the main housing.

[0016] Preferably, along the first direction, the center distance between the two explosion-proof valves is A, and the length of the housing assembly is B, A ≈ 1 / 4B.

[0017] According to the long battery cell structure of the present invention, the pole group is set as a split structure, namely the first pole group and the second pole group. In this way, the length of a single pole group can be effectively shortened, thereby reducing the probability of occurrence of wrinkles, deformations, layer shifting and other defects caused by the excessive length of the pole piece, that is, effectively reducing the manufacturing difficulty of the pole group. In addition, the long battery cell structure of the present invention is also provided with a protection assembly, and the support part formed into a shape similar to the letter H can effectively support the pole group assembly and the pole lugs of the pole group, effectively avoiding the damage caused by the pole group shifting.

[0018] To make the above objects, features and advantages of the present application more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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, without creative efforts, other related drawings can also be obtained based on these drawings.

[0020] Figure 1 is an exploded view of the long battery cell structure according to the embodiment of the present invention;

[0021] Figure 2It is a top view of a long battery cell structure according to an embodiment of the present utility model;

[0022] Figure 3 It is an assembly schematic diagram of a first electrode group and a support part according to an embodiment of the present utility model;

[0023] Figure 4 It is a partial schematic diagram of a side plate according to an embodiment of the present utility model.

[0024] Icons: 11 - First electrode group; 12 - Second electrode group; 21 - Side plate; 210 - Support plate; 211 - Avoidance recess; 212 - Support column; 213 - Sub - through hole; 22 - Open space; 23 - Through hole; 24 - Insulating film; 31 - Main case; 32 - Explosion - proof valve; 33 - Cover plate assembly; 34 - Balance plate. Detailed implementation manners

[0025] The following detailed implementation manners are provided to help readers obtain a comprehensive understanding of the methods, devices, and / or systems described herein. However, after understanding the disclosure of this application, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be obvious. For example, the order of operations described herein is merely an example and is not limited to the order set forth herein. Rather, changes that will be obvious after understanding the disclosure of this application can be made, except for 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.

[0026] 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 obvious after understanding the disclosure of this application.

[0027] Throughout the specification, when an element (such as a layer, region, or substrate) is described as "on" another element, "connected to" another element, "bonded to" another element, "above" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "above" another element, or "covering" another element, or there may be one or more other elements between them. In contrast, when an element is described as "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly above" another element, or "directly covering" another element, there may be no other elements between them.

[0028] 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.

[0029] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or parts, these components, elements, regions, layers, or parts are not limited by these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or part from another. Thus, a first component, element, region, layer, or part as referred to in the examples described herein may also be referred to as a second component, element, region, layer, or part without departing from the teachings of the examples.

[0030] 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 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 flipped, 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.

[0031] 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.

[0032] 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.

[0033] 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. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0034] According to the present utility model, a long battery cell structure is provided, asFigures 1 to 4 As shown, the long battery cell structure in this embodiment includes a pole group assembly and a protection assembly connected to the pole group assembly. After the two are connected, they are arranged in a housing assembly. The pole group assembly includes independent first and second pole groups 11 and 12, and the two are connected in sequence (reducing the internal resistance of the battery cell), so that the length of a single pole group can be effectively shortened, thereby reducing the probability of occurrence of defects such as wrinkles, deformation, and layer displacement caused by excessive pole piece length, that is, effectively reducing the manufacturing difficulty of the pole group; the protection assembly can support and protect the first pole group 11 and the second pole group 12. In the following, the specific structures and assembly relationships of the above-mentioned various component parts of the long battery cell structure according to the present invention will be described in detail.

[0035] In this embodiment, as Figure 1 and Figure 3 shown, the protection assembly includes an insulating part and a support part formed in an H-shaped structure. Through the insulating part, the insulating effect on the pole group assembly can be realized, and through the support part, the support effect on the pole group assembly can be achieved to avoid damage to the pole group assembly due to jolting. Specifically, as Figures 3 to 4 shown, the support part includes two side plates 21, and each side plate 21 is provided with a support plate 210 and a support column 212 connected to the support plate 210 (the two can be integrally formed by injection molding). In order to improve the accuracy of the description of the following various components, it is set that the extending direction of the support plate 210 is the first direction, and the extending direction of the support column 212 is the second direction. The first direction and the second direction in this embodiment are perpendicular, so that the side plate 21 is formed in a T-shaped structure.

[0036] More specifically, as Figure 4 shown, the support column 212 is formed in a cuboid columnar structure and its interior is formed into a cavity, so that while ensuring the light weight of the long battery cell, the support effect on the pole group assembly can also be ensured. The support column 212 is formed with a sub-through hole 213. Along the first direction, the sub-through hole 213 penetrates the opposite side parts of the support column 212 and the sub-through hole 213 penetrates the first end of the support column 212 away from the support plate 210, so that the sub-through hole 213 is formed in a U-shaped structure. In this way, when the two side plates 21 are correspondingly assembled with the pole group assembly, the support part is formed in an H-shaped structure, that is, the first pole group 11 and the second pole group 12 are respectively arranged in the two open spaces 22 of the support part; at this time, the support plate 210 is attached to both sides of the length direction of the first pole group 11 and the second pole group 12 (the length direction of the first pole group 11 and the second pole group 12 is the first direction), and the two sub-through holes 213 on the two support columns 212 together form the through hole 23 of the support part, and the pole lugs of the first pole group 11 and the second pole group 12 can be overlapped through the through hole 23 to ensure the use effect of the pole group assembly.

[0037] It should be noted that, based on the above-mentioned assembly relationship between the electrode group assembly and the support part, the connection position of the support column 212 and the support plate 210 is not fixed and should be determined according to the actual lengths of the first electrode group 11 and the second electrode group 12; similarly, the lengths of the support column 212 and the support plate 210 should also be determined according to the actual specifications of the first electrode group 11 and the second electrode group 12. In addition, in order to ensure the stability of the connection between the first electrode group 11 and the second electrode group 12, the through hole 23 of the support part should be adapted to the tab so as to support the tab. Preferably, a chamfer structure is formed at the first end of the support column 212 to prevent it from scratching the tab. It should be further noted that the connection method between the side plate 21 and the electrode group assembly is not fixed. In this embodiment, an adhesive connection method is adopted, or a connection method such as tape fixation can also be used.

[0038] In addition, as Figure 4 shown, along the first direction, the thickness of the support column 212 is formed as W, 6 mm < W < 15 mm; along the second direction, the length of the support column 212 is formed as H, and the distance between the inner walls of the two support plates 210 is formed as C, H ≤ C / 2. The above data are the most preferred ranges obtained through multiple experiments.

[0039] In this embodiment, as Figure 3 shown, along the first direction, a plurality of avoidance recesses 211 are respectively formed on both sides of the support plate 210, and the plurality of avoidance recesses 211 located on the same side of the support plate 210 are spaced apart along the first direction. Through the avoidance recesses 211, the exhaust of the explosion-proof valve 32 can be facilitated, thereby effectively ensuring the use safety of the long battery cell.

[0040] In this embodiment, the insulating part is formed as an insulating film 24. Although not shown in the figure, the first end of the insulating film 24 can be clamped between the support plate 210 and the electrode group assembly, and then the insulating film 24 is wound to achieve its insulating technical effect.

[0041] In addition, as Figure 1 shown, the housing assembly includes a main housing 31 and a cover plate assembly 33. The cover plate assembly 33 is assembled with the main housing 31 through concave-convex cooperation. Their assembly structure belongs to the prior art and will not be elaborated here. The explosion-proof valve 32 of the long battery cell in this embodiment is arranged on the side of the main housing 31, as Figure 2 shown. In order to ensure the exhaust effect of the long battery cell, two explosion-proof valves 32 are provided in this embodiment; along the first direction, the center distance between the two explosion-proof valves 32 is A, and the length of the housing assembly is B, A ≈ 1 / 4B. That is, the explosion-proof valve 32 is located at 1 / 4 of the length of the housing assembly, so that the gas inside the battery cell can quickly converge at the explosion-proof valve 32 through the internal air passage, effectively improving the use safety of the battery cell.

[0042] The housing assembly further includes a balance plate 34 disposed on the negative electrode side of the electrode group assembly to ensure balanced thrust when the electrode group is inserted into the housing.

[0043] According to the long battery cell structure of the present utility model, the electrode group is set as a split structure, namely the first electrode group 11 and the second electrode group 12. In this way, the length of a single electrode group can be effectively shortened, thereby reducing the probability of occurrence of defects such as wrinkles, deformation, and layer displacement caused by the excessive length of the electrode sheet, that is, effectively reducing the manufacturing difficulty of the electrode group. In addition, the long battery cell structure of the present invention is also provided with a protection assembly. The support portion formed into an H-shaped structure can effectively support the electrode group assembly and the electrode tabs of the electrode group, effectively avoiding the occurrence of damage caused by the movement of the electrode group.

[0044] Finally, it should be noted that the above embodiments are only specific embodiments of the present application, 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 in 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 cause the essence of the corresponding technical solutions to 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 determined by the protection scope of the claims.

Claims

1. A long battery cell structure, characterized in that, The long battery cell structure includes: A pole group assembly, having at least a first pole group and a second pole group connected in sequence; A protection assembly, including a support part, which is formed in an H-shaped structure. The support part forms two open spaces and a through hole. The first pole group and the second pole group are respectively disposed in the open spaces, and the pole tabs of the first pole group and the pole tabs of the second pole group are connected through the through hole; and A housing assembly, after the pole group assembly and the protection assembly are correspondingly connected, they are disposed inside the housing assembly.

2. The long battery cell structure according to claim 1, characterized in that, The support part includes two side plates, and each side plate includes a support plate and a support column connected to the support plate; the support plate extends in a first direction, and the support column extends in a second direction, and the first direction and the second direction are perpendicular, so that the side plate is formed in a T-shaped structure.

3. The long battery cell structure according to claim 2, characterized in that, Along the first direction, a plurality of avoidance recesses are respectively formed on both sides of the support plate, and the plurality of avoidance recesses located on the same side of the support plate are spaced along the first direction.

4. The long battery cell structure according to claim 2, characterized in that, The support column is formed in a cuboid columnar structure and a cavity is formed inside the support column. The support column forms a sub-through hole; along the first direction, the sub-through hole penetrates the opposite side parts of the support column and the first end of the support column away from the support plate, so that the sub-through hole is formed in a U-shaped structure.

5. The long battery cell structure according to claim 4, characterized in that, When the support part is correspondingly assembled with the pole group assembly, the two sub-through holes on the two support columns together form the through hole; the support plate is attached to both sides of the first pole group and the second pole group in the length direction, and the through hole is correspondingly adapted to the pole tabs.

6. The long battery cell structure according to claim 4, wherein Along the first direction, the thickness of the support column is W, 6mm < W < 15mm; along the second direction, the length of the support column is H, and the distance between the inner walls of the two support plates is C, H ≤ C / 2.

7. The long battery cell structure according to claim 2, characterized in that, The protection assembly further includes an insulating film.

8. The long battery cell structure according to claim 2, wherein, The housing assembly includes a main housing and a cover plate assembly, and the cover plate assembly is assembled with the main housing through concave-convex cooperation.

9. The long battery cell structure according to claim 8, wherein, Along the first direction, two explosion-proof valves are provided on one side of the main housing.

10. The long battery cell structure according to claim 9, wherein, Along the first direction, the center distance between the two explosion-proof valves is A, and the length of the housing assembly is B, A ≈ 1 / 4B.

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