Blade winding pole group structure

Abstract

The utility model relates to a lithium battery structure, in particular to a blade winding pole group structure. The utility model provides a blade winding pole group structure. The blade winding pole group structure comprises a pole group, and the switching sheets are arranged at the two ends of the pole group and are suitable for arranging the positive / negative pole lugs on the same side of the pole group. Through the arrangement of the adapter plate, the positive / negative pole lugs are arranged on the same side of the pole group, so that the overall length of the pole group is reduced, the overall infiltration of the battery cell is ensured, and the efficiency of the battery cell is improved.

Description

Technical Field

[0001] The utility model relates to the structure of a lithium battery, in particular to the structure of a blade winding pole group. Background Art

[0002] In the related art, the pole group of the blade battery is formed by a stacking method.

[0003] However, compared with the formed winding of the pole group, the winding pole group can save costs, improve efficiency and qualification rate.

[0004] At the present stage, because the blade battery is relatively long, if the pole ears are led out from both sides of the wound battery core, and the positive and negative pole ears are arranged on both sides of the battery core, the battery core cannot be fully infiltrated during the infiltration process.

[0005] Therefore, how to solve the problem of complete infiltration during the infiltration process of the battery core is a technical problem to be solved urgently in this field. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a structure of a blade winding pole group to solve the above problems.

[0007] To achieve the above purpose, an embodiment of the utility model provides a structure of a blade winding pole group, including:

[0008] A pole group; and

[0009] Adapter plates arranged at both ends of the pole group, and the adapter plates are adapted to arrange the positive pole ear and the negative pole ear on the same side of the pole group.

[0010] Preferably, the adapter plate is in an "L" shape, and the two adapter plates are arranged oppositely with respect to the pole group.

[0011] Preferably, a positive pole cover plate is fixed on one side in the length direction of the pole group, and the positive pole cover plate is electrically connected to one end of the pole group.

[0012] Preferably, the positive pole cover plate is adapted to limit and seal the adapter plate.

[0013] Preferably, one end of the positive pole ear is fixed on the bottom wall of the other end of the adapter plate, and the positive pole ear is electrically connected to the positive pole cover plate.

[0014] Preferably, a negative pole cover plate is fixed on the other side in the length direction of the pole group, and the negative pole cover plate is electrically connected to one end of the pole group.

[0015] Preferably, the negative pole cover plate is adapted to limit and seal the adapter plate.

[0016] Preferably, one end of the negative pole ear is fixed on the bottom wall of the other end of the adapter plate, and the negative pole ear is electrically connected to the negative pole cover plate.

[0017] Preferably, the adapter piece is a metal part.

[0018] Preferably, the adapter piece is made of copper.

[0019] Compared with the prior art, the embodiment of the blade-wound electrode group structure of the present utility model has the following beneficial effects: through the arrangement of the adapter piece, the positive electrode tab and the negative electrode tab are guided to be arranged on the same side of the electrode group, reducing the overall length of the electrode group to ensure that the entire battery cell can be infiltrated, thereby improving the efficiency of the battery cell.

[0020] Other features and advantages of the present utility model will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by practicing the present utility model.

[0021] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the accompanying drawings, the detailed description is as follows. Description of the Drawings

[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 Shows a perspective view of the blade-wound electrode group structure of the present utility model;

[0024] Figure 2 Shows a front view of the blade-wound electrode group structure of the present utility model.

[0025] In the figure:

[0026] 1. Electrode group; 11. Positive electrode cover plate; 12. Negative electrode cover plate; 13. Positive electrode tab; 14. Negative electrode tab; 2. Adapter piece. Detailed Embodiments

[0027] To make the objects, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0028] Such as Figure 1 AndFigure 2 As shown in Figure 2 , the present utility model provides a blade-wound electrode group structure, including:

[0029] An electrode group 1; and connecting pieces 2 provided at both ends of the electrode group 1, and the connecting pieces 2 are adapted to arrange the positive and negative electrode tabs 14 on the same side of the electrode group 1. The connecting pieces 2 are in an "L" shape, and the two connecting pieces 2 are arranged oppositely with respect to the electrode group 1. The connecting pieces 2 described in this embodiment are not limited to the "L" shape, and the connecting pieces 2 can also be in a "C" shape, a "Z" shape or other shapes that can guide the positive electrode tab 13 and the negative electrode tab 14 from both ends in the length direction of the electrode group 1 to the same side of the electrode group 1. Through the arrangement of the connecting pieces 2, the positive electrode tab 13 and the negative electrode tab 14 are guided and arranged on the same side of the electrode group 1, reducing the overall length of the electrode group 1 to ensure that the whole battery cell can be infiltrated, and improving the efficiency of the battery cell.

[0030] In order to improve the stability and sealing performance of the fixation of the connecting piece 2 and the positive electrode tab 13, a positive electrode cover plate 11 is fixed on one side in the length direction of the electrode group 1, and the positive electrode cover plate 11 is electrically connected to one end of the electrode group 1. The positive electrode cover plate 11 is adapted to limit and seal the connecting piece 2. One end of the positive electrode tab 13 is fixed on the bottom wall of the other end of the connecting piece 2, and the positive electrode tab 13 is electrically connected to the positive electrode cover plate 11. After one side of the connecting piece 2 is fixed on one side in the length direction of the electrode group 1, the positive electrode cover plate 11 is adapted to limit and fix the connecting piece 2 from the outside, improving the stability of the fixation of the connecting piece 2 and the electrode group 1. At the same time, the positive electrode cover plate 11 also plays a sealing role. The positive electrode cover plate 11 is fixed on the outer side wall of the electrode group 1, achieving the effect of sealing the connecting piece 2 and the electrode group 1.

[0031] Furthermore, a negative electrode cover plate 12 is fixed on the other side in the length direction of the electrode group 1, and the negative electrode cover plate 12 is electrically connected to one end of the electrode group 1. The negative electrode cover plate 12 and the positive electrode cover plate 11 are symmetrically arranged with respect to the electrode group 1, and the negative electrode cover plate 12 is adapted to limit and seal the connecting piece 2. One end of the negative electrode tab 14 is fixed on the bottom wall of the other end of the connecting piece 2, and the negative electrode tab 14 is electrically connected to the negative electrode cover plate 12. The negative electrode cover plate is adapted to limit and fix the connecting piece 2 from the outside, improving the stability of the fixation of the connecting piece 2 and the electrode group 1. At the same time, the negative electrode cover plate also plays a sealing role. The negative electrode cover plate is fixed on the outer side wall of the electrode group 1, achieving the effect of sealing the connecting piece 2 and the electrode group 1. In order to improve the electrical conductivity, the connecting piece 2 is a metal part. Further, the connecting piece 2 is made of copper.

[0032] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 construed as a limitation on the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] Based on the above inspiration from the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A blade wound pole group structure, characterized in that: include: Pole group (1); as well as Adapter plates (2) arranged at both ends of the electrode group (1), the adapter plates (2) being suitable for arranging the positive electrode tab and the negative electrode tab on the same side of the electrode group (1) The adapter plate (2) is in an "L" shape, and the two adapter plates (2) are arranged opposite to the electrode group (1); A negative electrode cover plate (12) is fixed to the other side of the electrode group (1) in the length direction, and the negative electrode cover plate (12) is electrically connected to one end of the electrode group (1).

2. The blade wound pole group structure according to claim 1, characterized in that: A positive electrode cover plate (11) is fixed to one side of the electrode group (1) in the length direction, and the positive electrode cover plate (11) is electrically connected to one end of the electrode group (1).

3. The blade-wound pole group structure according to claim 2, characterized in that: The positive electrode cover plate (11) is suitable for limiting and sealing the adapter plate (2).

4. The blade-wound pole group structure according to claim 3, characterized in that: One end of the positive electrode tab (13) is fixed to the bottom wall of the other end of the adapter plate (2), and the positive electrode tab (13) is electrically connected to the positive electrode cover plate (11).

5. The blade-wound pole group structure according to claim 1, characterized in that: The negative electrode cover plate (12) is suitable for limiting the sealing adapter plate (2).

6. The blade-wound pole group structure according to claim 5, characterized in that: One end of the negative electrode tab (14) is fixed to the bottom wall of the other end of the adapter plate (2), and the negative electrode tab (14) is electrically connected to the negative electrode cover plate (12).

7. The blade-wound pole group structure according to claim 1, characterized in that: The adapter plate (2) is a metal part.

8. The blade-wound pole group structure according to claim 1, characterized in that: The adapter plate (2) is made of copper.

Images