Battery stack core

Abstract

The utility model provides a battery laminated core which comprises a plurality of pole pieces stacked in order, each pole piece is provided with a positive pole connecting assembly and a negative pole connecting assembly, and the periphery of each pole piece is provided with a first semi-annular metal belt and a second semi-annular metal belt; the pole pieces are round and do not need to be cut off, the positive pole lug and the negative pole lug are led to the top of one pole piece from the outer sides of the pole pieces, the positive pole lug is welded to the first semi-annular metal belt, the negative pole lug is welded to the second semi-annular metal belt, and by means of the design mode, the space utilization rate of the stacked core can be increased to 95% from 83% of a traditional structure; the whole space utilization rate is higher, the battery capacity can be improved by more than 10%, the battery capacity is larger, the subsequent use effect is ensured, the practicability is higher, the positive pole lug and the negative pole lug are led to the annular outer surface of the pole piece, the space utilization rate of the battery stack core can be improved to 93% from 83% of a traditional structure, and the battery capacity is improved by 10%.

Description

Technical Field

[0001] The utility model relates to the technical field of button batteries, in particular to a battery stack. Background Art

[0002] Button cell, also known as button cell, refers to a battery with the appearance and size of a small button. Generally speaking, it has a larger diameter and a thinner thickness. Among them, the stacked core of the button cell is the core component of the button cell. However, the existing technology has the following shortcomings when used:

[0003] The stacked core of existing button batteries is generally a circular electrode with a bow cut out, which is then stacked up and the pole ears are welded in the empty bow area. This design method will result in low overall space utilization of the stacked core, small battery capacity, and difficulty in ensuring subsequent use effects, resulting in low practicality.

[0004] Therefore, a battery stack is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to address the problem that the stacked core of the existing button-type batteries is generally a circle with a bow-shaped pole piece cut out, which is then stacked up and the pole ear is welded in the empty bow-shaped area. This design method will result in a low overall space utilization rate of the stacked core, a small battery capacity, difficulty in ensuring subsequent use effects, and low practicality.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A battery stack is provided to improve the above problems.

[0008] The specific application is as follows:

[0009] A battery stack comprises a plurality of neatly stacked pole pieces, wherein a positive pole connection assembly and a negative pole connection assembly are arranged on the pole pieces, and a first semi-annular metal belt and a second semi-annular metal belt are arranged around the pole pieces.

[0010] As a preferred technical solution of the present application, the positive electrode connection assembly includes a plurality of positive electrode ears fixedly connected to the first semi-annular metal belt, and the lengths of the plurality of positive electrode ears are inconsistent, and the plurality of positive electrode ears are arranged in an arc shape with respect to the pole piece.

[0011] As a preferred technical solution of the present application, the negative electrode connecting assembly includes a plurality of negative electrode ears fixedly connected to the second semi-annular metal belt, and the lengths of the plurality of negative electrode ears are inconsistent, and the plurality of negative electrode ears are arranged in an arc shape with respect to the pole piece, the positive electrode ears and the negative electrode ears are both L-shaped, and the positive electrode ears and the negative electrode ears are both in contact with the pole piece, and the first semi-annular metal belt and the second semi-annular metal belt are both fixedly connected to the top of the pole piece.

[0012] As a preferred technical solution of the present application, the positive electrode connection assembly includes a plurality of positive electrode tabs of different lengths, and the positive electrode tabs are fixedly connected to the bottom of the first semi-annular metal belt.

[0013] As a preferred technical solution of the present application, the negative electrode connection assembly includes a plurality of negative electrode tabs of different lengths, wherein the negative electrode tabs are fixedly connected to the bottom of the second semi-annular metal belt, and the first semi-annular metal belt and the second semi-annular metal belt are both fixedly connected to the annular outer surface of the pole piece.

[0014] As a preferred technical solution of the present application, the positive electrode tab is not in contact with the negative electrode tab, and the number of the positive electrode tab and the number of the negative electrode tab are no less than five.

[0015] As a preferred technical solution of the present application, the arc angle between the first semi-annular metal belt and the second semi-annular metal belt is 90°-180°.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] In the scheme of this application:

[0018] The pole piece is a whole circle and does not need to be cut. The positive pole ear and the negative pole ear are led from the outside of the pole piece to the top of one of the pole pieces. The positive pole ear is welded to the first semi-annular metal strip, and the negative pole ear is welded to the second semi-annular metal strip. This makes the overall space utilization rate of the battery core higher, and the space utilization rate can be increased from 83% of the traditional structure to 95%, the battery capacity is increased by more than 10%, and the practicality is higher.

[0019] Several circular pole pieces are neatly stacked, and the positive pole tabs and the negative pole tabs are led to the annular outer surface of the pole pieces, so that the space utilization rate of the battery core can be increased from 83% of the traditional structure to 93%, and the battery capacity is increased by 10%. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall structure of a battery stack provided in this application.

[0021] Figure 2 A schematic diagram of the structure of the positive electrode tab and the negative electrode tab in a battery stack provided in the present application.

[0022] Figure 3 This is a schematic structural diagram of a first semi-annular metal belt and a second semi-annular metal belt in a battery stack provided in the present application.

[0023] Figure 4 A schematic structural diagram of a positive electrode connection assembly and a negative electrode connection assembly in a battery core electrode sheet provided in the present application.

[0024] Indicated in the figure:

[0025] 1. Pole piece; 2. Positive electrode connection assembly; 3. Negative electrode connection assembly; 4. First semi-annular metal belt; 5. Positive electrode ear; 6. Second semi-annular metal belt; 7. Negative electrode ear. DETAILED DESCRIPTION

[0026] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0027] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention to be protected, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present utility model, it should be noted that the terms "upper", "lower", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply 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 a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] Example 1: Figure 1 and Figure 2As shown, a battery stack proposed in this embodiment includes a plurality of neatly stacked pole pieces 1, on which a positive electrode connection assembly 2 and a negative electrode connection assembly 3 are arranged, and a first semi-annular metal belt 4 and a second semi-annular metal belt 6 are arranged around the pole piece 1.

[0032] like Figure 1 and Figure 2 As shown, the positive electrode connection assembly 2 includes a plurality of positive electrode tabs 5 fixedly connected to the first semi-annular metal belt 4 , and the lengths of the plurality of positive electrode tabs 5 are inconsistent, and the plurality of positive electrode tabs 5 are arranged in an arc shape with respect to the pole piece 1 .

[0033] like Figure 1 and Figure 2 As shown, the negative electrode connection assembly 3 includes a plurality of negative electrode ears 7 fixedly connected to the second semi-annular metal belt 6, and the lengths of the plurality of negative electrode ears 7 are inconsistent, and the plurality of negative electrode ears 7 are arranged in an arc shape with respect to the pole piece 1, the positive electrode ear 5 and the negative electrode ear 7 are both L-shaped, and the positive electrode ear 5 and the negative electrode ear 7 are both fitted with the pole piece 1, the first semi-annular metal belt 4 and the second semi-annular metal belt 6 are both fixedly connected to the top of the pole piece 1, and the pole piece 1 is a full circle and does not need to be cut off, and the positive electrode ear 5 and the negative electrode ear are connected. The ear 7 is led from the outside of the pole piece 1 to the top of one of the pole pieces 1, a plurality of positive pole ears 5 are welded together with the first semi-annular metal belt 4, a plurality of negative pole ears 7 are welded together with the second semi-annular metal belt 6, and the extension directions of the plurality of positive pole ears 5 and the plurality of negative pole ears 7 are inconsistent, and the number of their respective extension directions is ≥5. This design can make the space utilization rate of the stacked core higher, and the space utilization rate can be increased from 83% of the traditional structure to 95%, the battery capacity is increased by more than 10%, and the practicality is higher.

[0034] Example 2: Figure 3 and Figure 4 As shown, a battery stack proposed in this embodiment includes a plurality of neatly stacked pole pieces 1, on which a positive electrode connection assembly 2 and a negative electrode connection assembly 3 are arranged, and a first semi-annular metal belt 4 and a second semi-annular metal belt 6 are arranged around the pole piece 1.

[0035] like Figure 3 and Figure 4 As shown, the positive electrode connection assembly 2 includes a plurality of positive electrode tabs 5 of different lengths, and the positive electrode tabs 5 are fixedly connected to the bottom of the first semi-annular metal belt 4 .

[0036] like Figure 3 and Figure 4 As shown, the negative electrode connection assembly 3 includes a plurality of negative electrode tabs 7 of different lengths, and the negative electrode tabs 7 are fixedly connected to the bottom of the second semi-annular metal belt 6 , and the first semi-annular metal belt 4 and the second semi-annular metal belt 6 are both fixedly connected to the annular outer surface of the pole piece 1 .

[0037] like Figure 1-4 As shown, the positive electrode tab 5 is not in contact with the negative electrode tab 7, and the number of the positive electrode tab 5 and the negative electrode tab 7 is not less than five. Several positive electrode tabs 5 and several negative electrode tabs 7 are led to the annular outer surface of the electrode sheet 1, several positive electrode tabs 5 are welded to the first semi-annular metal belt 4, and several negative electrode tabs 7 are welded to the second semi-annular metal belt 6, so that the space utilization rate of the battery core can be increased from 83% of the traditional structure to 93%, and the battery capacity is increased by 10%.

[0038] like Figure 2 and Figure 4 As shown, the arc angle between the first semi-annular metal belt 4 and the second semi-annular metal belt 6 is 90°-180°.

[0039] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.

Claims

1. A battery stack, comprising a plurality of neatly stacked pole pieces (1), characterized in that: The pole piece (1) is provided with a positive pole connection assembly (2) and a negative pole connection assembly (3), and the pole piece (1) is provided with a first semi-annular metal belt (4) and a second semi-annular metal belt (6) around its periphery; The positive electrode connection assembly (2) comprises a plurality of positive electrode tabs (5) of different lengths, wherein the positive electrode tabs (5) are fixedly connected to the bottom of the first semi-annular metal belt (4); The negative electrode connection assembly (3) comprises a plurality of negative electrode tabs (7) of different lengths, wherein the negative electrode tabs (7) are fixedly connected to the bottom of the second semi-annular metal belt (6), and the first semi-annular metal belt (4) and the second semi-annular metal belt (6) are both fixedly connected to the annular outer surface of the pole piece (1).

2. A battery stack according to claim 1, characterized in that: The positive electrode connection assembly (2) comprises a plurality of positive electrode tabs (5) fixedly connected to the first semi-annular metal strip (4), wherein the lengths of the plurality of positive electrode tabs (5) are inconsistent, and the plurality of positive electrode tabs (5) are arranged in an arc shape with respect to the pole piece (1).

3. A battery stack according to claim 2, characterized in that: The negative electrode connection assembly (3) comprises a plurality of negative electrode tabs (7) fixedly connected to the second semi-annular metal belt (6), and the lengths of the plurality of negative electrode tabs (7) are inconsistent, and the plurality of negative electrode tabs (7) are arranged in an arc shape with respect to the pole piece (1), the positive electrode tab (5) and the negative electrode tab (7) are both L-shaped, and the positive electrode tab (5) and the negative electrode tab (7) are both in contact with the pole piece (1), and the first semi-annular metal belt (4) and the second semi-annular metal belt (6) are both fixedly connected to the top of the pole piece (1).

4. A battery stack according to claim 1, characterized in that: The positive electrode tab (5) and the negative electrode tab (7) are not in contact with each other, and the number of the positive electrode tab (5) and the number of the negative electrode tab (7) are no less than five.

5. A battery stack according to claim 4, characterized in that: The arc angle between the first semi-annular metal belt (4) and the second semi-annular metal belt (6) is 90°-180°.

Images