Single battery and battery pack

Abstract

The utility model discloses a single battery and a battery pack. The single battery comprises a battery cell, a connecting piece and a limiting assembly, the battery core comprises a core package and a tab, and the tab comprises a main body and a connecting part; the main body is connected to the core package; the connecting sheet is positioned between the core package and the tab; the surface, back on to the core package, of the connecting sheet is connected to the connecting part; the limiting assembly comprises a limiting piece, and the limiting piece is provided with a limiting groove. The main body extends towards the core package from the connecting part between the connecting part and the connecting sheet, passes through the limiting groove and is limited by the limiting groove, so that the main body is limited by the inner side wall of the limiting groove, the limiting piece can conveniently apply a limiting acting force to the tab and the connecting sheet, and the relative rest between the tab and the connecting sheet is ensured; relative shaking of the tabs and the connecting pieces is avoided, so that dynamic tearing of the tabs and the connecting pieces is avoided, and the stability of the tabs of the single batteries is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a single battery cell and a battery pack. Background Technology

[0002] With the development of technology, battery packs are gradually being used in people's lives and providing power to various electronic devices. Lithium batteries, as a type of battery pack, are widely used.

[0003] In the existing technology, the existing single cell includes the tabs of the cell pack and the connecting piece. The tabs of the cell pack are welded to the connecting piece. However, the tabs will shake and dynamically tear with the connecting piece when shaking, resulting in poor tab stability of the existing single cell. Utility Model Content

[0004] One objective of this invention is to provide a single-cell battery and a battery pack, which aims to solve the technical problem that the tabs of existing single-cell batteries are unstable due to shaking and dynamic tearing between the tabs and connecting pieces.

[0005] To achieve the above objectives, the present invention provides a solution: a single-cell battery, comprising:

[0006] A battery cell includes a core package and a tab, wherein the tab includes a body and a connecting portion; the body is connected to the core package;

[0007] A connecting piece is located between the core package and the electrode tab; the surface of the connecting piece facing away from the core package is connected to the connecting portion.

[0008] A limiting component includes a limiting member, wherein the limiting member is provided with a limiting groove;

[0009] The main body extends toward the core package from the connection between the connecting part and the connecting piece, and the main body passes through the limiting groove and is limited by the limiting groove.

[0010] Optionally, the connection between the connecting part and the connecting piece is accommodated within the limiting groove.

[0011] Optionally, the main body and the connecting portion form a first space;

[0012] The connecting piece passes through the first space and is stacked with the main body and the connecting part.

[0013] Optionally, the limiting member includes a first limiting part and a second limiting part, the first limiting part and the second limiting part are arranged opposite to each other and form a limiting groove;

[0014] The first limiting part and the second limiting part limit the electrode tab and the connecting piece in opposite directions.

[0015] Optionally, the first limiting part and the second limiting part form a U-shaped structure.

[0016] Optionally, the first limiting part and / or the second limiting part are provided with a chamfered part, which is located at the opening of the limiting groove and is used to guide the electrode tab.

[0017] Optionally, the limiting member further includes a first support portion, which is located within the limiting groove and is offset from the electrode tab or the connecting piece.

[0018] The first support portion is used to connect the first limiting portion and the second limiting portion.

[0019] Optionally, the limiting component further includes a housing; the housing is located on the side of the limiting member facing away from the core package;

[0020] The housing is connected to the limiting member.

[0021] Optionally, the housing is provided with a receiving groove for receiving the limiting member.

[0022] To achieve the above objectives, the present invention provides a solution as follows: a battery pack, comprising: a housing and a plurality of individual batteries, wherein the plurality of individual batteries are disposed in the housing.

[0023] The beneficial effects of this utility model are as follows:

[0024] This utility model provides a single battery cell and a battery pack. The battery cell includes a cell pack and a tab. The tab includes a body and a connecting part. The body is connected to the cell pack. A connecting piece is located between the cell pack and the tab. The surface of the connecting piece facing away from the cell pack is connected to the connecting part. A limiting component includes a limiting member with a limiting groove. The body extends from the connection between the connecting part and the connecting piece toward the cell pack. The body passes through the limiting groove and is limited by the limiting groove, so that the inner sidewall of the limiting groove restricts the body. This facilitates the limiting member to apply a limiting force to the tab and the connecting piece, ensuring relative stillness between the tab and the connecting piece, avoiding relative shaking between the tab and the connecting piece, and thus preventing dynamic tearing between the tab and the connecting piece, ensuring the stability of the single battery cell's tab. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the assembly structure of a single battery provided in an embodiment of this utility model;

[0027] Figure 2 This is a cross-sectional view of the assembly structure of a single battery provided in this embodiment of the utility model;

[0028] Figure 3 It shows Figure 2 A magnified view of a section at point A in the middle;

[0029] Figure 4 This is an exploded structural diagram of a single battery provided in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the limiting component of a single battery provided in an embodiment of this utility model.

[0031] Explanation of icon numbers:

[0032] 100. Single cell battery;

[0033] 10. Battery cell; 11. Cell pack; 12. Electrode; 12a. First space; 121. Main body; 122. Connecting part;

[0034] 20. Connecting piece;

[0035] 30. Limiting component; 31. Limiting member; 31a. Limiting groove; 311. First limiting part; 3111. Chamfered part; 312. Second limiting part; 313. First support part; 32. Housing; 32a. Receiving groove. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] With the development of technology, battery packs are gradually being used in people's lives and providing power to various electronic devices. Lithium batteries, as a type of battery pack, are widely used.

[0038] Currently, in lithium batteries from various industries, the tabs and connecting pieces inside the cell pack are welded together, and the connecting pieces contact the terminals to achieve the purpose of conducting electricity. However, during the transportation of lithium batteries, the cell pack may shake, causing the sidewalls of the tabs to come into contact with and rub against the connecting pieces, resulting in the sidewalls of the tabs being scratched or even cut off by the connecting pieces, which will reduce the battery capacity.

[0039] Please refer to the attached document. Figures 1-5 This application provides an embodiment for use in a single-cell battery 100, which provides electrical energy and powers electronic devices. The single-cell battery 100 is a type of lithium battery and is not limited thereto.

[0040] Please refer to the attached document. Figures 1-5 In this utility model, a single battery cell 100 includes a cell 10, a connecting piece 20, and a limiting assembly 30; the cell 10 includes a core pack 11 and a tab 12, the tab 12 includes a main body 121 and a connecting portion 122; the main body 121 is connected to the core pack 11; the connecting piece 20 is located between the core pack 11 and the tab 12; the surface of the connecting piece 20 facing away from the core pack 11 is connected to the connecting portion 122; the limiting assembly 30 includes a limiting member 31, the limiting member 31 is provided with a limiting groove 31a; the main body 121 is connected to the connecting portion 122 by the connecting portion 122. The connection between the pieces 20 extends toward the core package 11. The main body 121 passes through the limiting groove 31a and is limited by the limiting groove 31a, so that the inner sidewall of the limiting groove 31a restricts the main body 121. This facilitates the limiting member 31 to apply a limiting force to the tab 12 and the connecting piece 20, ensuring that the tab 12 and the connecting piece 20 are relatively stationary, avoiding relative shaking between the tab 12 and the connecting piece 20, thereby preventing dynamic tearing between the tab 12 and the connecting piece 20, and ensuring the stability of the tab 12 of the single cell 100.

[0041] Please refer to the attached document. Figures 1-4 In this invention, the battery cell 10 includes a core package 11 and a tab 12. The tab 12 is disposed on the upper side of the core package 11 and connected to the core package 11, so that the tab 12 is fixed to the upper side of the core package 11. The tab 12 serves as a contact point when the core package 11 is charged. The tab 12 includes a body 121 and a connecting part 122. The body 121 is connected to the core package 11 so that the tab 12 can be connected to the core package 11 through the body 121.

[0042] Please refer to the attached document. Figures 1-4In this invention, the connecting piece 20 is located between the core package 11 and the electrode tab 12. The surface of the connecting piece 20 facing away from the core package 11 is connected to the connecting part 122. This allows the upper surface of the connecting piece 20 to be welded to the connecting part 122, thus facilitating the fixing of the connecting piece 20 to the electrode tab 12. The connecting piece 20 is spaced apart from the side wall of the electrode tab 12, so that there is a gap between the connecting piece 20 and the side wall of the electrode tab 12. This prevents the connecting piece 20 from contacting the side wall of the electrode tab 12, thus preventing the electrode tab 12 from being scratched or even cut by the connecting piece 20 when the core package 11 shakes.

[0043] Please refer to the attached document. Figure 1 Optionally, multiple core packs 11 and multiple tabs 12 are provided. Adjacent core packs 11 are arranged at intervals and close to each other, while the tabs 12 are arranged opposite each other. Each core pack 11 is connected to a corresponding tab 12. The tabs 12 extend outward so that some tabs 12 are on the outside of the core pack 11 and some tabs 12 are exposed to the external environment and connected to connecting pieces 20. In this case, one connecting piece 20 connects two adjacent tabs 12. Optionally, the core pack 11 is in the shape of a package, and multiple core packs 11 are arranged adjacently and serve as the main energy part of the single cell 100.

[0044] Please refer to the attached document. Figures 1-5 In this utility model, the limiting component 30 is disposed on the outside of the tab 12; the limiting component 30 includes a limiting member 31, the limiting member 31 is provided with a limiting groove 31a; the main body 121 extends from the connection between the connecting part 122 and the connecting piece 20 toward the core package 11, the main body 121 passes through the limiting groove 31a and is limited by the limiting groove 31a, so that the inner sidewall of the limiting groove 31a restricts the main body 121, thereby facilitating the limiting member 31 to apply a limiting force to the tab 12 and the connecting piece 20, ensuring the relative stillness between the tab 12 and the connecting piece 20, avoiding the relative shaking between the tab 12 and the connecting piece 20, thereby avoiding dynamic tearing between the tab 12 and the connecting piece 20, and ensuring the stability of the tab 12 of the single cell 100.

[0045] Please refer to the attached document. Figures 2-3 The connection between the connecting part 122 and the connecting piece 20 is accommodated in the limiting groove 31a, so that the connection between the connecting part 122 and the connecting piece 20 is limited by the limiting groove 31a. This allows the inner sidewall of the limiting groove 31a to restrict the connection between the connecting part 122 and the connecting piece 20, thereby applying a limiting force to the tab 12 and the connecting piece 20, preventing the tab 12 and the connecting piece 20 from shaking, and thus ensuring the dynamic stability of the tab 12 and the connecting piece 20, and preventing dynamic tearing of the tab 12 and the connecting piece 20.

[0046] Please refer to the attached document. Figures 1-3The main body 121 and the connecting part 122 form a first space 12a; the connecting piece 20 passes through the first space 12a and is stacked with the main body 121 and the connecting part 122 so that the surface of the connecting piece 20 facing away from the core package 11 can contact the connecting part 122 through the first space 12a, thereby facilitating the connection between the connecting piece 20 and the connecting part 122.

[0047] Please refer to the attached document. Figures 1-5 The limiting member 31 includes a first limiting part 311 and a second limiting part 312. The second limiting part 312 is located above the first limiting part 311. The first limiting part 311 and the second limiting part 312 are arranged opposite to each other and form a limiting groove 31a. The inner sidewall of the first limiting part 311 and the inner sidewall of the second limiting part 312 serve as the inner sidewall of the limiting groove 31a. The first limiting part 311 and the second limiting part 312 limit the tab 12 and the connecting piece 20 in opposite directions. The tab 12 and the connecting piece 20 pass through the inner sidewall of the first limiting part 311 and the inner sidewall of the second limiting part 312, and are limited by the first limiting part 311 and the second limiting part 312, so that the inner sidewall of the first limiting part 311 and the inner sidewall of the second limiting part 312 restricts the tab 12 and the connecting piece 20. This makes it easier for the limiting member 31 to apply a limiting force to the tab 12 and the connecting piece 20, ensuring that the tab 12 and the connecting piece 20 are relatively stationary, avoiding relative shaking of the tab 12 and the connecting piece 20, thereby preventing dynamic tearing of the tab 12 and the connecting piece 20, and ensuring the stability of the tab 12 of the single cell 100.

[0048] Please refer to the attached document. Figure 5 The first limiting part 311 and the second limiting part 312 form a U-shaped structure so that the first limiting part 311 and the second limiting part 312 can form an enclosed U-shaped space. The tab 12 and the connecting piece 20 pass through the U-shaped space and are limited by the inner sidewall of the U-shaped space, so that the first limiting part 311 and the second limiting part 312 can limit the tab 12 and the connecting piece 20. This makes it easier for the first limiting part 311 and the second limiting part 312 to apply a limiting force to the tab 12 and the connecting piece 20, ensuring that the tab 12 and the connecting piece 20 are relatively stationary, avoiding relative shaking of the tab 12 and the connecting piece 20, thereby avoiding dynamic tearing of the tab 12 and the connecting piece 20, and ensuring the stability of the tab 12 of the single cell 100.

[0049] Please refer to the attached document. Figure 5The first limiting part 311 and / or the second limiting part 312 are provided with a chamfered part 3111. The chamfered part 3111 is located at the opening of the limiting groove 31a and is used to guide the tab 12 so that the tab 12 can enter the limiting groove 31a through the opening of the limiting groove 31a under the guidance of the chamfered part 3111. At the same time, the chamfered part 3111 ensures the smoothness of the first limiting part 311 and the second limiting part 312, avoids sharp edges from cutting the outer surface of the tab 12, prevents the tab 12 from dynamically tearing with the first limiting part 311 and the second limiting part 312, and ensures the stability of the tab 12 of the single cell 100.

[0050] Please refer to the attached document. Figure 5 The limiting member 31 also includes a first support portion 313, which is located within the limiting groove 31a and is offset from the tab 12 or the connecting piece 20. The first support portion 313 is used to connect the first limiting portion 311 and the second limiting portion 312, so that the first support portion 313 can support the first limiting portion 311 and the second limiting portion 312 respectively, ensuring the positional space between the first limiting portion 311 and the second limiting portion 312, and improving the stability of the first limiting portion 311 relative to the second limiting portion 312. While supporting the first limiting portion 311, the first support portion 313 avoids interfering with the tab 12 or the connecting piece 20, and prevents the first support portion 313 from scratching or colliding with the tab 12 or the connecting piece 20.

[0051] Please refer to the attached document. Figures 1-4 The limiting component 30 also includes a housing 32; the housing 32 is located on the side of the limiting member 31 facing away from the core package 11; the housing 32 is connected to the limiting member 31 so that the housing 32 can apply pressure to the limiting member 31 from top to bottom, further ensuring the stability of the limiting member 31. At the same time, the housing 32 and the limiting member 31 cooperate to apply a limiting force to the tab 12 and the connecting piece 20, further ensuring the relative stillness between the tab 12 and the connecting piece 20, avoiding relative shaking between the tab 12 and the connecting piece 20, thereby preventing dynamic tearing between the tab 12 and the connecting piece 20, and ensuring the stability of the tab 12 of the single cell 100.

[0052] Please refer to the attached document. Figures 1-4 The housing 32 is provided with a receiving groove 32a, which is used to receive the limiting member 31, so that the housing 32 can receive the limiting member 31 through the inner side wall of the receiving groove 32a, thereby facilitating the inner side wall of the receiving groove 32a to press against the limiting member 31, thereby facilitating the application of the weight of the housing 32 to the limiting member 31, and improving the limiting force of the limiting member 31 relative to the tab 12 and the connecting piece 20.

[0053] In another embodiment, a battery pack includes a housing and a plurality of individual batteries 100 disposed in the housing, the plurality of individual batteries 100 being part of the battery pack, so that the plurality of individual batteries 100 are fixed to the inside of the housing, thereby facilitating the housing to protect the plurality of individual batteries 100.

[0054] The beneficial effects of this utility model are as follows:

[0055] This utility model provides a single battery cell 100 and a battery pack. The battery cell 10 includes a core pack 11 and a tab 12. The tab 12 includes a main body 121 and a connecting part 122. The main body 121 is connected to the core pack 11. A connecting piece 20 is located between the core pack 11 and the tab 12. The surface of the connecting piece 20 facing away from the core pack 11 is connected to the connecting part 122. A limiting component 30 includes a limiting member 31, which has a limiting groove 31a. The main body 121 is connected to the connecting part 122 and the connecting piece 20. The connection extends toward the core package 11. The main body 121 passes through the limiting groove 31a and is limited by the limiting groove 31a, so that the inner sidewall of the limiting groove 31a restricts the main body 121. This facilitates the limiting member 31 to apply a limiting force to the tab 12 and the connecting piece 20, ensuring the relative stillness between the tab 12 and the connecting piece 20, avoiding relative shaking between the tab 12 and the connecting piece 20, thereby preventing dynamic tearing between the tab 12 and the connecting piece 20, and ensuring the stability of the tab 12 of the single cell 100.

[0056] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0057] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0058] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0059] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A single cell, characterized by, The application relates to a battery cell, comprising: an electric core comprising a core package and a tab, the tab comprising a main body and a connecting part, the main body being connected to the core package; a connecting sheet between the core package and the tab, a surface of the connecting sheet facing away from the core package being connected to the connecting part; a limiting assembly comprising a limiting piece, the limiting piece being provided with a limiting groove; the main body extending towards the core package from a connecting position between the connecting part and the connecting sheet, the main body passing through the limiting groove and being limited by the limiting groove.

2. The cell according to claim 1, wherein the connecting position between the connecting part and the connecting sheet being accommodated in the limiting groove.

3. The cell according to claim 2, wherein the main body and the connecting part being provided with a first space, the connecting sheet penetrating the first space and being stacked with the main body and the connecting part.

4. The single cell according to any one of claims 1 to 3, characterized by, the limiting piece comprising a first limiting part and a second limiting part, the first limiting part and the second limiting part being oppositely arranged and forming the limiting groove; the first limiting part and the second limiting part limiting the tab and the connecting sheet in opposite directions.

5. The cell according to claim 4, wherein the first limiting part and the second limiting part forming a U-shaped structure.

6. The cell according to claim 4, wherein the first limiting part and / or the second limiting part being provided with a chamfer part, the chamfer part being located at an opening of the limiting groove and being used for guiding the tab.

7. The cell according to claim 4, wherein the limiting piece further comprising a first supporting part, the first supporting part being located in the limiting groove and being arranged in a dislocation mode with the tab or the connecting sheet; the first supporting part being used for connecting the first limiting part and the second limiting part.

8. The cell according to claim 4, wherein the limiting assembly further comprising a shell, the shell being located at a side of the limiting piece facing away from the core package, and the shell being connected to the limiting piece.

9. The cell according to claim 8, wherein the shell being provided with an accommodating groove, the accommodating groove being used for accommodating the limiting piece.

10. A battery pack, characterized by, The application relates to a battery cell, comprising: a box body and a plurality of single battery cells according to any one of claims 1 to 9, the plurality of single battery cells being arranged in the box body.

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