Tab, single battery, battery device, and electric device

Abstract

The present disclosure provides a connecting tab, a single battery, a battery device and a power utilization device. The connecting tab comprises a non-welding part and a welding part connected together. The welding part comprises two welding walls for welding to both sides of the tab respectively. One end of each of the two welding walls is connected to the same end of the non-welding part, and the two welding walls are arranged in a spaced manner along the thickness direction of the connecting tab. The end of the welding wall away from the non-welding part is partially bent, so that the welding wall has two segments stacked in the thickness direction, and the bending part between the two segments of the welding wall forms a passivation structure. Through the above structural design, the connecting tab provided by the present disclosure is arranged on both sides of the tab through the two welding walls and welded, thereby reducing the welding slag and debris generated during welding, reducing the risk of short circuit, and improving the welding quality. At the same time, the passivation structure is formed by the bending design of the welding wall, thereby avoiding the relative displacement of the end edge of the welding wall and the root of the tab after the connection is released, and the splitting of the tab.

Description

Technical Field

[0001] This disclosure relates to the field of single-cell batteries, and more particularly to a connecting piece, a single-cell battery, a battery device, and an electrical device. Background Technology

[0002] In existing single-cell batteries, the tabs are welded to the connecting tabs, which then connect to other structures. Since the connecting tabs are typically made of metal, their sharp edges can easily cut the tabs. Furthermore, during the welding process of the tabs and connecting tabs in existing single-cell batteries, the welded area of ​​the tabs is partially exposed, leading to the problem of weld slag and debris falling onto the cell structure, causing a short circuit risk and affecting the welding yield. Summary of the Invention

[0003] A primary objective of this disclosure is to overcome at least one of the deficiencies of the prior art described above and to provide a single-cell battery.

[0004] To achieve the above objectives, the present disclosure adopts the following technical solution: According to one aspect of this disclosure, a connecting piece is provided for connecting the tabs of a battery cell; the connecting piece includes a non-welded portion and a welded portion connected together; the welded portion includes two weld walls for welding to both sides of the tab; one end of each of the two weld walls is connected to the same end of the non-welded portion, and the two weld walls are spaced apart along the thickness direction of the connecting piece; the end of the weld wall away from the non-welded portion is bent, so that the weld wall has two segments stacked in the thickness direction, and the bent portion between the two segments of the weld wall forms a passivation structure.

[0005] According to one embodiment of this disclosure, the end of the welded wall that connects to the non-welded portion is a connecting end, and the extension direction of the connecting end has an angle of 20° to 80° with the extension direction of the non-welded portion.

[0006] According to one embodiment of this disclosure, the angle between the extending directions of the connecting ends of the two welded walls and the extending direction of the non-welded portion is equal.

[0007] According to one embodiment of this disclosure, the two stacked segments of the welded wall are a first segment and a second segment; one end of the first segment is connected to the non-welded portion; one end of the second segment is connected to the other end of the first segment, and the second segment is bent to the inside of the first segment facing the other welded wall.

[0008] According to one embodiment of this disclosure, the connecting piece further includes an insulating molten adhesive layer disposed on the non-welded portion.

[0009] Another primary objective of this disclosure is to overcome at least one of the deficiencies of the prior art described above and to provide a single-cell battery.

[0010] To achieve the above objectives, the present disclosure adopts the following technical solution: According to another aspect of this disclosure, a single-cell battery is provided, including a cell structure and a connecting piece as proposed in this disclosure and described in the above embodiments; the cell structure is connected to a tab, and the tab is welded to the connecting piece.

[0011] According to one embodiment of this disclosure, the weld wall is arranged parallel to the electrode tab.

[0012] According to one embodiment of this disclosure, the single cell is a pouch cell, and the single cell further includes an aluminum-plastic film; the aluminum-plastic film includes two film portions, namely a first film portion and a second film portion; the first film portion has a first perforation, and the second film portion has a second perforation, and the two film portions are joined together with the openings of the first perforation and the second perforation facing each other to form a cavity for accommodating the cell structure; wherein, the depth of the first perforation is greater than the depth of the second perforation; the tab extends from the gap between the two film portions, so that the tab is offset in the single cell along the depth direction of the second perforation, and the tab is offsetly welded to the connecting piece.

[0013] Another primary objective of this disclosure is to overcome at least one of the deficiencies of the prior art described above and to provide a battery device.

[0014] To achieve the above objectives, the present disclosure adopts the following technical solution: According to another aspect of this disclosure, a battery device is provided, comprising a single cell battery as presented in the present disclosure and described in the above embodiments.

[0015] Another primary objective of this disclosure is to overcome at least one of the deficiencies of the prior art described above and to provide an electrical device.

[0016] To achieve the above objectives, the present disclosure adopts the following technical solution: According to another aspect of this disclosure, an electrical device is provided, characterized in that it includes the battery device proposed in this disclosure and described in the above embodiments.

[0017] As can be seen from the above technical solutions, the advantages and positive effects of the connecting piece, single cell, battery device, and power supply device proposed in this disclosure are as follows: The connecting piece disclosed herein includes a non-welded portion and a welded portion connected together. The welded portion includes two weld walls, each for welding to both sides of the electrode lug. One end of each weld wall is connected to the same end of the non-welded portion, and the two weld walls are spaced apart along the thickness direction of the connecting piece. The end of the weld wall away from the non-welded portion is bent, so that the weld wall has two overlapping segments in the thickness direction, and the bent portion between the two segments of the weld wall forms a passivation structure. Through the above structural design, the connecting strip of the present disclosure is respectively set on both sides of the electrode lug and welded together via two weld walls, thereby reducing the slag and debris generated during the welding process, reducing the risk of short circuits, and improving the welding quality. At the same time, the present disclosure utilizes the bending design of the weld walls to form a passivation structure, thereby preventing relative displacement after the end edge of the weld wall is separated from the root of the electrode lug, which would lead to the electrode lug breaking. Attached Figure Description

[0018] The various objectives, features, and advantages of this disclosure will become more apparent from the following detailed description of preferred embodiments of the disclosure taken in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the disclosure and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein: Figure 1 This is a front view of the connecting piece according to an exemplary embodiment; Figure 2 yes Figure 1 A side view of the connecting piece is shown; Figure 3 yes Figure 2 A magnified view of a portion of the image; Figure 4 This is a front view of a single cell according to an exemplary embodiment; Figure 5 yes Figure 4 A side view of a single cell is shown; Figure 6 yes Figure 4 A bottom view of a single battery cell is shown. Figure 7 yes Figure 6 An enlarged view of part A in the image; Figure 8 yes Figure 4 A side view of a portion of the structure of a single battery cell is shown; Figure 9 yes Figure 8 An enlarged view of part B in the image.

[0019] The annotations in the attached figures are explained as follows: 100. Cell structure; 110. Electrode; 200. Aluminum-plastic film; 210. First membrane portion; 211. First crater; 220. Second membrane portion; 221. The second crater; 500. Connecting piece; 510. Non-welded parts; 520. Welding section; 521. Welded wall; 5211. Bending section; 5212. Connecting end; 5213. First paragraph; 5214. Second paragraph; 530. Insulating molten adhesive layer; α. Angle. Detailed Implementation

[0020] Typical embodiments embodying the features and advantages of this disclosure will be described in detail in the following description. It should be understood that this disclosure can have various variations in different embodiments without departing from the scope of this disclosure, and the descriptions and drawings therein are illustrative in nature and not intended to limit this disclosure.

[0021] In the following description of various exemplary embodiments of this disclosure, reference is made to the accompanying drawings, which form part of this disclosure, and which illustrate by way of example different exemplary structures, systems, and steps that can implement various aspects of this disclosure. It should be understood that other specific embodiments of the components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of this disclosure. Furthermore, while the terms “above,” “between,” “within,” etc., may be used in this specification to describe different exemplary features and elements of this disclosure, these terms are used herein only for convenience, such as the orientation according to the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this disclosure.

[0022] See Figure 1 The illustration shows a front view of the connector 500 disclosed herein. In this exemplary embodiment, the connector 500 disclosed herein is described as an example of a battery device applied to a drone. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this disclosure to other types of battery devices, and these changes shall still be within the scope of the principles of the connector 500 disclosed herein.

[0023] like Figure 1As shown, in one embodiment of this disclosure, the connecting piece 500 is used to connect the tabs 110 of a battery cell. The connecting piece 500 includes a non-welded portion 510 and a welded portion 520 connected to each other. (See also...) Figures 2 to 3 , Figure 2 The image shows a representative side view of the connecting piece 500; Figure 3 China representatively shows Figure 2 The above-mentioned figures show a partially enlarged view. The structure, connection method, and functional relationship of the main components of the connecting piece 500 disclosed herein will be described in detail below with reference to the figures.

[0024] like Figure 1 As shown, in one embodiment of this disclosure, the welding portion 520 includes two welding walls 521, which are respectively used for welding to both sides of the tab 110, for example, using ultrasonic welding or other welding processes. One end of each of the two welding walls 521 is connected to the same end of the non-welded portion 510, and the two welding walls 521 are spaced apart along the thickness direction of the connecting piece 500. The end of the welding wall 521 away from the non-welded portion 510 is bent, so that the welding wall 521 has two segments stacked in the thickness direction, and the bent portion 5211 between the two segments of the welding wall 521 forms a passivated structure. Through the above structural design, the connecting strip proposed in this disclosure is respectively disposed on both sides of the tab 110 via two welding walls 521 and welded together, thereby reducing weld slag and debris generated during the welding process, reducing the risk of short circuits, and improving welding quality. Meanwhile, this disclosure utilizes the bending design of the weld wall 521 to form a passivation structure, thereby preventing the relative displacement of the end edge of the weld wall 521 after it is separated from the root of the tab 110, which would cause the tab 110 to break.

[0025] like Figure 3 As shown, in one embodiment of this disclosure, the end of the welded wall 521 that connects to the non-welded portion 510 is a connecting end 5212. The extending direction of the connecting end 5212 has an angle α of 20° to 80° with the extending direction of the non-welded portion 510. Specifically, the angle α can be 20°, 30°, 45°, 60°, 80°, etc. Through the above structural design, this disclosure can utilize the above-mentioned angle α to form an inclined connection structure between the connecting end 5212 and the non-welded portion 510, so that the two welded walls 521 are separated by a certain distance along the thickness direction, which facilitates the insertion of the tab 110 into the gap between the two welded walls 521.

[0026] Based on the design of the inclined connection structure between the connecting end 5212 and the non-welded part 510, in one embodiment of this disclosure, the angle between the extending direction of the connecting end 5212 of the two welded walls 521 and the extending direction of the non-welded part 510 can be equal.

[0027] like Figure 3As shown, in one embodiment of this disclosure, the two stacked segments of the welded wall 521 are a first segment 5213 and a second segment 5214. One end of the first segment 5213 is connected to the non-welded portion 510. One end of the second segment 5214 is connected to the other end of the first segment 5213, and the second segment 5214 is bent to the inside of the first segment 5213 facing the other welded wall 521. In other words, the welded wall 521 is bent inward to form a passivated structure. Through the above structural design, this disclosure can prevent the end of the second segment 5214 (i.e., the other end of the second segment 5214 that is not connected to the first segment 5213) from being exposed outside the first segment 5213, thereby avoiding impact on other structures, such as avoiding puncturing the aluminum-plastic film 200 covering the outside of that location.

[0028] like Figure 1 and Figure 2 As shown, in one embodiment of this disclosure, the connecting piece 500 further includes an insulating molten adhesive layer 530, which is disposed on the non-welded portion 510. The insulating molten adhesive layer 530 can be formed by heating two adhesive layers together and then bonding them to the non-welded portion 510 of the connecting piece.

[0029] It should be noted that the connecting piece 500 shown in the accompanying drawings and described in this specification is merely a few examples among many connecting pieces 500 capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the connecting piece 500 shown in the accompanying drawings or described in this specification.

[0030] Based on the above detailed description of several exemplary embodiments of the connecting piece 500 proposed in this disclosure, an exemplary embodiment of a single cell battery proposed in this disclosure will be described below.

[0031] See Figure 4 The illustration shows a front view of a single battery cell proposed in this disclosure. In this exemplary embodiment, the single battery cell proposed in this disclosure is described as an example of a battery device applied to a drone. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this disclosure to other types of battery devices, and these changes shall still be within the scope of the principles of the single battery cell proposed in this disclosure.

[0032] like Figure 4 As shown, in one embodiment of this disclosure, the single-cell battery proposed in this disclosure includes a cell structure 100 and a connecting piece 500. (See also...) Figures 5 to 9 , Figure 5 The image shows a representative side view of a single cell. Figure 6 The image shows a representative bottom view of a single cell; Figure 7 China representatively shows Figure 6 An enlarged view of part A in the image; Figure 8 The image shows a representative side view of a portion of the structure of a single battery cell; Figure 9 China representatively shows Figure 8 The enlarged view of section B in the figure. The structure, connection method, and functional relationship of the main components of the single-cell battery proposed in this disclosure will be described in detail below with reference to the above figures.

[0033] like Figures 4 to 6 As shown, in one embodiment of this disclosure, the single-cell battery proposed in this disclosure includes a cell structure 100 and a connecting piece 500 proposed in this disclosure and described in detail in the above embodiments. Wherein, as Figure 8 As shown, the cell structure 100 is connected to a tab 110, which is welded to the connecting piece 500.

[0034] like Figure 8 As shown, in one embodiment of this disclosure, the welding wall 521 and the tab 110 are arranged parallel to each other. "Parallel arrangement" means that the extended portions of the welding wall 521 and the tab 110 do not have a relative angle, i.e., they do not need to be connected by bending. Through this structural design, this disclosure avoids the problem of weld slag falling into the battery cell during the bending welding of the connecting piece 500 and the tab 110, effectively reducing weld slag falling, preventing short circuits inside the battery cell, and further improving the safety and stability of the battery.

[0035] like Figures 4 to 7 As shown, in one embodiment of this disclosure, the single-cell battery proposed in this disclosure is a pouch battery, and the single-cell battery also includes an aluminum-plastic film 200. The aluminum-plastic film 200 includes two film portions, namely a first film portion 210 and a second film portion 220. The first film portion 210 has a first perforation 211, and the second film portion 220 has a second perforation 221. The two film portions are aligned with each other in such a way that the openings of the first perforation 211 and the second perforation 221 are opposite each other to form a cavity for accommodating the cell structure 100. In this regard, the depth of the first perforation 211 is greater than the depth of the second perforation 221. A tab 110 extends from the gap between the two film portions, so that the tab 110 is offset in the single-cell battery along the depth direction of the second perforation 221, and the tab 110 is offsetly welded to the connecting piece 500. In this design, the welding portion 520 of the connecting piece 500 is covered by the aluminum-plastic film 200, and the insulating adhesive layer 530 of the connecting piece 500 is located at the sealing point of the aluminum-plastic film 200 at that location to achieve a sealing function. In other words, Figure 1 and Figure 2 The structure of the protruding aluminum-plastic film 200 is the non-welded part 510 of the connecting piece 500.

[0036] It should be noted that the individual cells shown in the accompanying drawings and described in this specification are merely a few examples among many individual cells capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the individual cells shown in the accompanying drawings or described in this specification.

[0037] Based on the above detailed description of several exemplary embodiments of the single cell battery proposed in this disclosure, an exemplary embodiment of the battery device proposed in this disclosure will be described below.

[0038] In one embodiment of this disclosure, the battery device proposed in this disclosure includes the single cell battery proposed in this disclosure and described in detail in the above embodiments.

[0039] It should be noted that the battery devices shown in the accompanying drawings and described in this specification are merely a few examples among many battery devices capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the battery devices shown in the accompanying drawings or described in this specification.

[0040] Based on the above detailed description of an exemplary embodiment of the battery device proposed in this disclosure, an exemplary embodiment of the power-consuming device proposed in this disclosure will be described below.

[0041] In one embodiment of this disclosure, the electrical device proposed in this disclosure includes the battery device proposed in this disclosure and described in detail in the above embodiments.

[0042] It should be noted that the electrical appliances shown in the accompanying drawings and described in this specification are merely a few examples among many electrical appliances capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the electrical appliances shown in the accompanying drawings or described in this specification.

[0043] In summary, the connecting piece 500 proposed in this disclosure includes a non-welded portion 510 and a welded portion 520 connected to each other. The welded portion 520 includes two welded walls 521, which are respectively used for welding to both sides of the tab 110. One end of each of the two welded walls 521 is connected to the same end of the non-welded portion 510. The two welded walls 521 are arranged at intervals along the thickness direction of the connecting piece 500. The end of the welded wall 521 away from the non-welded portion 510 is bent, so that the welded wall 521 has two segments stacked in the thickness direction. The bent portion 5211 between the two segments of the welded wall 521 forms a passivated structure. Through the above structural design, the connecting strip proposed in this disclosure is respectively set on both sides of the tab 110 and welded together via two welded walls 521, thereby reducing the welding slag and debris generated during the welding process, reducing the risk of short circuits, and improving the welding quality. Meanwhile, this disclosure utilizes the bending design of the weld wall 521 to form a passivation structure, thereby preventing the relative displacement of the end edge of the weld wall 521 after it is separated from the root of the tab 110, which would cause the tab 110 to break.

[0044] The foregoing has described and / or illustrated in detail exemplary embodiments of the connecting piece, single cell, battery device, and power device proposed in this disclosure. However, the embodiments of this disclosure are not limited to the specific embodiments described herein; rather, components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment may also be used in combination with other components and / or steps of other embodiments. In describing the elements / components / etc. described and / or illustrated herein, the terms "a," "an," and "the above" are used to indicate the presence of one or more elements / components / etc. The terms "comprising," "including," and "having" are used to indicate an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc. Furthermore, the terms "first" and "second," etc., in the claims and specification are used only as illustrative marks and are not intended to limit the numerical scope of the subject matter.

[0045] Although the connectors, individual cells, battery devices, and power devices proposed in this disclosure have been described with respect to different specific embodiments, those skilled in the art will recognize that modifications may be made to the implementation of this disclosure within the spirit and scope of the claims.

Claims

1. A connecting piece (500) for connecting the tabs (110) of a battery cell; characterized in that, The connecting piece (500) includes a non-welded portion (510) and a welded portion (520) connected to each other; the welded portion (520) includes two welded walls (521) for welding to both sides of the tab (110); one end of each of the two welded walls (521) is connected to the same end of the non-welded portion (510), and the two welded walls (521) are spaced apart along the thickness direction of the connecting piece (500); the end of the welded wall (521) away from the non-welded portion (510) is bent, so that the welded wall (521) has two segments stacked in the thickness direction, and the bent portion (5211) between the two segments of the welded wall (521) forms a passivation structure.

2. The connecting piece (500) according to claim 1, characterized in that, The end of the welded wall (521) that connects to the non-welded part (510) is the connecting end (5212), and the extension direction of the connecting end (5212) has an angle (α) of 20° to 80° with the extension direction of the non-welded part (510).

3. The connecting piece (500) according to claim 1, characterized in that, The angle between the extending directions of the connecting ends (5212) of the two welded walls (521) and the extending direction of the non-welded portion (510) is equal.

4. The connecting piece (500) according to claim 1, characterized in that, The two overlapping sections of the welded wall (521) are a first section (5213) and a second section (5214); one end of the first section (5213) is connected to the non-welded part (510); one end of the second section (5214) is connected to the other end of the first section (5213), and the second section (5214) is bent to the inside of the first section (5213) facing the other welded wall (521).

5. The connecting piece (500) according to claim 1, characterized in that, The connecting piece (500) further includes an insulating molten adhesive layer (530), which is disposed on the non-welded portion (510).

6. A single-cell battery, characterized in that, It includes a cell structure (100) and a connecting piece (500) as described in any one of claims 1 to 5; the cell structure (100) is connected to a tab (110), and the tab (110) is welded to the connecting piece (500).

7. The single-cell battery according to claim 6, characterized in that, The weld wall (521) is arranged parallel to the tab (110).

8. The single-cell battery according to claim 6, characterized in that, The single cell is a pouch cell, and the single cell also includes an aluminum-plastic film (200); the aluminum-plastic film (200) includes two film portions, namely a first film portion (210) and a second film portion (220); the first film portion (210) has a first perforation (211), and the second film portion (220) has a second perforation (221). The two film portions are aligned with each other in such a way that the openings of the first perforation (211) and the second perforation (221) are opposite to each other to form a cavity for accommodating the cell structure (100); wherein, the depth of the first perforation (211) is greater than the depth of the second perforation (221); the tab (110) extends out from the gap between the two film portions, so that the tab (110) is offset in the single cell along the depth direction of the second perforation (221), and the tab (110) is offsetly welded to the connecting piece (500).

9. A battery device, characterized in that, Includes the single-cell battery as described in any one of claims 6 to 8.

10. An electrical device, characterized in that, Includes the battery device as described in claim 9.

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