Square battery cell cover plate assembly and battery cell device

Abstract

The utility model relates to the technical field of battery cell structures of lithium batteries, in particular to a square battery cell cover plate assembly and a battery cell device, which comprises a top cover plate provided with a locking piece; the stop frame is arranged at the bottom of the top cover plate and connected with the locking piece in an embedded mode, and grooves are formed in the two opposite sides of the stop frame respectively; and the guide sheet frame is arranged below the stop frame, the two sides of the interior of the guide sheet frame are respectively provided with a convex part, and the convex parts are connected with the grooves of the stop frame in a matched manner so as to form a battery cell accommodating area. Through adaptive connection of the stop frame, the top cover plate and the guide sheet frame, a stable structure is formed, the battery cell can be better fixed, further the battery cell is more tightly fixed in the shell, the shell entering pressure is reduced, the tab can be effectively prevented from overflowing and being in contact with the battery shell, the risk of short circuit is reduced, and the integrity and the performance stability of the battery cell are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery cell structures, in particular to a square cell cover plate assembly and a cell device. Background Art

[0002] The square aluminum shell battery cell is currently the battery cell with the largest output and the widest application. In the traditional lithium battery production process, the core or stacked core may be subjected to uneven force when it is installed into the battery shell, which may cause damage or deformation of the internal structure of the battery cell, affecting the performance and life of the battery. In the shelling process, the core or stacked core is still the main force bearer. Excessive or uneven pressure may cause the pole piece to be squeezed, especially when the pole piece material is thin or fragile, it is more prone to damage. The current structure of the aluminum shell cover plate lacks stable support. When subjected to external force, there is a possibility that the pole ear foil overflows beyond the cover plate and contacts the battery aluminum shell, resulting in poor insulation.

[0003] Therefore, in order to solve the problem that the tabs overflow during the loading process and contact the battery aluminum shell due to the lack of stable support of the aluminum shell cover, thereby affecting the poor structural stability of the battery, it is necessary to design a square battery cover assembly and a battery device. Utility Model Content

[0004] In order to solve the technical problems mentioned in the background technology, the utility model provides a square battery cover assembly and a battery device:

[0005] In a first aspect, the utility model provides a square battery cover assembly, comprising:

[0006] A top cover plate provided with a locking member;

[0007] A stop frame is installed at the bottom of the top cover plate and is engaged with the locking member, and grooves are respectively formed on two opposite sides of the stop frame; and

[0008] The guide frame is arranged below the stop frame, and the two sides of the guide frame are respectively provided with protrusions, and the protrusions are adaptively connected with the grooves of the stop frame to form a battery cell accommodating area.

[0009] Furthermore, the stop frame comprises an upper pressing plate and a lower pressing plate, and the upper pressing plate is detachably connected to the lower pressing plate via a connecting piece; and

[0010] The upper pressing plate groove is connected to the locking member.

[0011] Furthermore, the connecting piece is a keel connecting piece.

[0012] Furthermore, the keel connector is arranged in parallel between the upper pressing plate and the lower pressing plate, and the two ends of the keel connector correspond to the bottom of the groove.

[0013] Furthermore, the keel connector is provided with a plurality of square holes.

[0014] Furthermore, the stop frame is a rectangular frame structure.

[0015] Furthermore, the stop frame is provided with through holes for the tabs to align and connect.

[0016] Further, the guide plate frame includes a first guide plate and a second guide plate;

[0017] The first guide piece and the second guide piece are respectively connected to the groove of the stop frame through the protrusion to enclose the battery cell accommodating area.

[0018] In a second aspect, the utility model provides a battery cell device, including: using the aforementioned square battery cell cover assembly.

[0019] Furthermore, the battery cell device further comprises:

[0020] Aluminum shell;

[0021] The inner side of the aluminum shell is bent at two opposite sides to form a guide rail; and

[0022] The two outer sides of the guide frame are connected respectively by the guide rails.

[0023] The beneficial effect of the utility model is that the adaptive connection of the stop frame, the top cover plate and the guide frame in the utility model forms a stable structure, which can better fix the battery cells, reduce the shell entry pressure by fixing the battery cells more tightly in the shell, and effectively prevent the pole ears from overflowing and contacting the battery shell, reducing the risk of short circuit and ensuring the integrity and performance stability of the battery cells.

[0024] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram showing a square aluminum shell battery cell structure involved in some embodiments is shown;

[0028] Figure 2 A schematic diagram showing the connection of the top cover plates involved in some embodiments is shown;

[0029] Figure 3 A cross-sectional view of a stop frame according to some embodiments is shown;

[0030] Figure 4 A top view of a stop frame according to some embodiments is shown;

[0031] Figure 5 A schematic structural diagram of a battery cell device according to some embodiments is shown;

[0032] Figure 6 A schematic diagram of the structure of an aluminum shell involved in some embodiments is shown;

[0033] In the figure:

[0034] 1 top cover plate, 102 locking piece;

[0035] 2 stop frame, 201 groove, 202 upper pressing plate, 203 lower pressing plate, 204 keel connecting piece, 205 square hole, 206 through hole;

[0036] 3 guide plate frame, 301 raised portion, 302 first guide plate, 303 second guide plate;

[0037] 8 aluminum shell, 801 guide rail. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] like Figure 1As shown, at least one embodiment provides a square cell cover assembly, including: a top cover plate 1, which is provided with a locking member 102; a stop frame 2, which is installed at the bottom of the top cover plate 1 and is engaged with the locking member 102, and the opposite sides of the stop frame 2 are respectively provided with grooves 201; and a guide frame 3, which is arranged below the stop frame, and the inner sides of the guide frame 3 are respectively provided with protrusions 301, and the protrusions are adapted to be connected with the grooves of the stop frame to form a cell accommodating area 123. Through the combined design of the top cover plate, the stop frame and the guide frame, the stress conditions of the core winding or core stacking process into the shell are changed, and by constructing a stable structural system, the stability of the cell during assembly and use can be ensured, and it is helpful to protect the cell and avoid damage caused by the tab overflowing and contacting the aluminum shell during assembly or transportation.

[0040] like Figure 2 As shown, in some embodiments, the stop frame includes an upper pressing plate 202 and a lower pressing plate 203, and the upper pressing plate 202 is detachably connected to the lower pressing plate 203 through a connecting piece 204; and the upper pressing plate 202 is connected to the locking piece. In some embodiments, the upper pressing plate 202 and the locking piece are connected by an embedded structure, and the embedded connection can effectively prevent the tab foil from overflowing the stop frame and contacting the shell, thereby avoiding poor insulation caused by material overflow. This embedded stop frame provides better mechanical support, helps to disperse and withstand the external forces that the battery may encounter during transportation and use, and enhances the structural stability of the battery.

[0041] like Figure 3 As shown, in some embodiments, the connector 204 is a keel connector. The strong load-bearing capacity and good mechanical properties of the keel connector can improve the overall strength and rigidity of the stop frame, ensure stability during assembly and use, and according to the close fit of the keel connector, the sealing between the battery cover and the shell can be improved to prevent electrolyte leakage and external contaminants from entering.

[0042] In some embodiments, the keel connector 204 is disposed in parallel between the upper pressing plate 202 and the lower pressing plate 203 , and two ends of the keel connector 204 correspond to the bottom of the groove.

[0043] like Figure 2~Figure 3 As shown, the keel connector is provided with a plurality of square holes 205. The square holes are provided on the keel connector as gas passages, which help balance the pressure inside the battery cell, thereby improving the heat dissipation efficiency of the battery cell. However, through reasonable design and layout, the stability of the structure can be further enhanced without affecting the strength and rigidity of the structure.

[0044] In some embodiments, the stop frame 2 is a rectangular frame structure. The geometric characteristics of the rectangular frame structure help ensure accurate alignment and assembly between various components, reduce errors in the assembly process, and improve the consistency and reliability of the battery.

[0045] like Figure 4 As shown, in some embodiments, the stop frame 2 is provided with a through hole 206 for the tabs to align and connect. The tabs are inserted through the through holes in the dotted line portion, ensuring that the tabs can be more accurately positioned and connected to the corresponding contact points, reducing errors in the connection process, thereby improving the reliability and stability of the battery connection.

[0046] In some embodiments, the guide plate frame 3 includes a first guide plate 302 and a second guide plate 303; the first guide plate 302 and the second guide plate 303 are respectively connected to the groove of the stop frame through the protrusion to enclose the battery cell accommodating area 123. The split design of the guide plate frame greatly optimizes the spatial layout inside the battery cell, provides a clear boundary for the winding or stacking of the battery cell, and makes the arrangement of the internal components of the battery more compact and orderly, and can provide a more stable support structure.

[0047] like Figure 5 As shown, at least one embodiment provides a battery cell device, including the aforementioned square battery cell cover assembly. Further, it also includes: an aluminum shell 8; Figure 6 As shown, the two opposite sides of the interior of the aluminum shell are bent to form a guide rail 801; and the two outer sides of the guide frame 3 are connected by the guide rail 801. In some embodiments, the two outer sides of the guide frame 3 are respectively provided with a slide groove that cooperates with the guide rail 801. The matching design of the guide rail and the slide groove helps to fix the position of the guide frame, reduce the displacement of components caused by vibration or other external forces during the use of the battery, enhance the stability of the battery assembly, and enable the guide frame to slide smoothly into the guide rail of the aluminum shell, reduce the displacement of components caused by vibration or other external forces during the use of the battery, and help protect the battery cells and other sensitive components inside the battery.

[0048] In summary, the utility model forms a stable structure according to the adaptive connection of the stop frame, the top cover plate and the guide frame, which can better fix the battery cell, reduce the shell entry pressure by fixing the battery cell more tightly in the shell, and effectively prevent the tab from overflowing and contacting the battery shell, reduce the risk of short circuit, and ensure the integrity and performance stability of the battery cell.

[0049] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0051] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A square cell cover assembly, characterized in that: include: A top cover plate (1) provided with a locking member (102); A stop frame (2) is mounted on the bottom of the top cover plate (1) and is engaged with the locking member (102), and grooves (201) are respectively formed on two opposite sides of the stop frame (2); and The guide frame (3) is arranged below the stop frame, and protrusions (301) are respectively provided on both sides of the interior of the guide frame (3), and the protrusions are adapted to be connected with the grooves of the stop frame to form a battery cell accommodating area (123).

2. The square cell cover assembly according to claim 1, characterized in that: The stop frame comprises an upper pressing plate (202) and a lower pressing plate (203), wherein the upper pressing plate (202) is detachably connected to the lower pressing plate (203) via a connecting piece (204); and The upper pressing plate (202) is connected to the locking member (102).

3. The square cell cover assembly according to claim 2, characterized in that: The connecting piece (204) is a keel connecting piece.

4. The square cell cover assembly according to claim 3, characterized in that: The keel connection piece (204) is arranged in parallel between the upper pressing plate (202) and the lower pressing plate (203), and the two ends of the keel connection piece (204) correspond to the bottom of the groove.

5. The square battery cover assembly according to claim 3, characterized in that: The keel connecting piece is provided with a plurality of square holes (205).

6. The square battery cover assembly according to claim 1, characterized in that: The stop frame (2) is a rectangular frame structure.

7. The square battery cover assembly according to claim 1, characterized in that: The stop frame (2) is provided with a through hole (206) for the pole ears to align and connect.

8. The square battery cover assembly according to claim 1, characterized in that: The guide blade frame (3) comprises a first guide blade (302) and a second guide blade (303); The first guide piece (302) and the second guide piece (303) are respectively connected to the groove of the stop frame through the protrusion to enclose the battery cell accommodating area (123).

9. A battery cell device, characterized in that: include: A square cell cover assembly as described in any one of claims 1 to 8 is used.

10. The battery cell device according to claim 9, characterized in that: Also includes: Aluminum shell (8); The inner side of the aluminum shell is bent at two opposite sides to form a guide rail (801); and The two outer sides of the guide frame (3) are respectively connected via the guide rails (801).

Images