Battery pack

Abstract

The utility model provides a battery pack which comprises a battery cell, a circuit board and a connecting piece connected between the battery cell and the circuit board, the connecting piece comprises a first connecting structure, a second connecting structure and a fusing structure connected between the first connecting structure and the second connecting structure, the first connecting structure is connected to the circuit board, the second connecting structure is connected to the battery cell, and the fusing structure is connected to the circuit board. The fusing structure comprises a main body part and a reinforcing part protruding from the main body part.

Description

Technical Field

[0001] This application relates to the field of lithium-ion battery technology, and more particularly to a battery pack. Background Technology

[0002] With the advancement of science and technology, lithium batteries have become increasingly popular due to their flexibility and ability to meet a variety of people's needs.

[0003] In existing technologies, lithium battery cells are typically connected in series or parallel. To achieve the above functions, a stable connection structure is essential. Generally, lithium battery cells are connected in series or parallel using connecting tabs. These connecting tabs include a fusible link. When the current in the battery pack exceeds the rated value, the fusible link will melt due to overheating, protecting the battery and related electronic equipment. However, the fusible link is prone to deformation, leading to product defects.

[0004] Therefore, it is necessary to provide a new battery pack. Utility Model Content

[0005] This application provides a battery pack with a long lifespan and high production efficiency.

[0006] Specifically, this application provides a battery pack including a battery cell, a circuit board, and a connector connecting the battery cell and the circuit board. The connector includes a first connection structure, a second connection structure, and a fusible structure connecting the first connection structure and the second connection structure. The first connection structure is connected to the circuit board, the second connection structure is connected to the battery cell, and the fusible structure includes a main body and a reinforcing part protruding from the main body.

[0007] Furthermore, the reinforcing part is formed by a stamping process.

[0008] Furthermore, the first connection structure includes a first base and a first welding portion extending from the first base, the first welding portion being welded to the circuit board; the second connection structure includes a second base and a second welding portion extending from the second base, the second welding portion being welded to the battery cell.

[0009] Furthermore, the connector also includes a first extension extending from the first base and a second extension extending from the second base, the first extension and the second extension extending opposite to each other and spaced apart from each other.

[0010] Furthermore, both the first extension and the second extension are spaced apart from the fusible structure, and the fusible structure connects the first base and the second base.

[0011] Furthermore, a first gap is provided between the fusible structure and the first extension, a second gap is provided between the fusible structure and the second extension, and a third gap is provided between the first extension and the second extension, wherein the first gap, the second gap and the third gap are connected.

[0012] Furthermore, the first gap and the second gap extend in the same direction and are interconnected, and the extending direction of the reinforcing portion is the same as the extending direction of the first gap and the second gap.

[0013] Furthermore, the length of the reinforcing portion is greater than or equal to the total length of the first gap and the second gap.

[0014] Furthermore, the extending direction of the third gap intersects the extending directions of the first gap and the second gap.

[0015] On the other hand, this application provides a battery pack including a battery cell, a circuit board, and a connector connecting the battery cell and the circuit board. The connector includes a first connection structure, a second connection structure, and a fusible structure connecting the first connection structure and the second connection structure. The first connection structure is connected to the circuit board, the second connection structure is connected to the battery cell, and the fusible structure includes a main body and a reinforcing part connected to the main body.

[0016] In this application, the fusion structure of the connector includes a main body and a reinforcing part protruding from the main body, which enhances the strength of the fusion structure, prevents it from twisting and deforming, avoids the risk of short circuit, reduces the defect rate, and saves costs; at the same time, it improves the production process, makes mass production more reliable, and improves efficiency; this design also improves the service life of the connector. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the battery pack structure of this application.

[0018] Figure 2 yes Figure 1 An exploded 3D view of the battery pack shown.

[0019] Figure 3 yes Figure 2 A further exploded 3D view of the battery pack shown.

[0020] Figure 4 yes Figure 3 Enlarged view of the circled area shown.

[0021] Figure 5 yes Figure 3 A further exploded 3D view of the battery pack shown.

[0022] Figure 6yes Figure 5 The diagram shows the structure of the connector.

[0023] Figure 7 yes Figure 6 A structural schematic diagram of the connector from another perspective. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0025] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and / or "upper" and similar terms are for ease of description only and are not limited to a location or spatial orientation. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected" or "linked" and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0026] Please combine Figures 1 to 7This application provides a battery pack 100, including a housing 10, a docking terminal 20, a battery cell 30, a circuit board 40, and a connector 50 connecting the battery cell 30 and the circuit board 40. The housing 10 includes a first housing 11 and a second housing 12, which, when assembled, form a receiving space. The docking terminal 20, battery cell 30, circuit board 40, and connector 50 are all located within the receiving space. The docking terminal 20 is connected to the circuit board 40 and is used to dock with related electronic equipment. The connector 50 includes a first connecting structure 51, a second connecting structure 52, and a fuse structure 53 connecting the first connecting structure 51 and the second connecting structure 52. The first connecting structure 51 is connected to the circuit board 40, and the second connecting structure 52 is connected to the battery cell 30. When the current in the battery pack 100 exceeds the rated value, the fuse structure 53 of the connector 50 will melt due to overheating to protect the safety of the battery pack 100 and related electronic equipment. The fusible link structure 53 includes a main body 531 and a reinforcing part 532 connected to the main body 531. Specifically, the reinforcing part 532 protrudes from the main body 531. The reinforcing part 532 is formed by a stamping process. The reinforcing part 532 enhances the strength of the fusible link structure 53, prevents it from twisting and deforming, and avoids the risk of short circuit.

[0027] The first connection structure 51 includes a first base 511 and a first welding portion 512 extending from the first base 511, the first welding portion 512 being welded to the circuit board 40. The second connection structure 52 includes a second base 521 and a second welding portion 522 extending from the second base 521, the second welding portion 522 being welded to the battery cell 30. A fusible link structure 53 connects the first base 511 and the second base 521. The connector 50 also includes a first extension 54 extending from the first base 511 and a second extension 55 extending from the second base 521, the first extension 54 and the second extension 55 extending opposite to each other and spaced apart. Both the first extension 54 and the second extension 55 are spaced apart from the fusible link structure 53. A first gap 56 is provided between the fusible link structure 53 and the first extension 54, a second gap 57 is provided between the fusible link structure 53 and the second extension 55, and a third gap 58 is provided between the first extension 54 and the second extension 55, the first gap 56, the second gap 57 and the third gap 58 being interconnected. The first gap 56 and the second gap 57 extend in the same direction and are interconnected. The extension direction of the reinforcing part 532 is the same as that of the first gap 56 and the second gap 57. The length of the reinforcing part 532 is greater than or equal to the total length of the first gap 56 and the second gap 57. The extension direction of the third gap 58 intersects with that of the first gap 56 and the second gap 57.

[0028] In this application, the fusion structure 53 of the connector 50 includes a main body 531 and a reinforcing part 532 protruding from the main body 531, which enhances the strength of the fusion structure 53, prevents it from twisting and deforming, avoids the risk of short circuit, reduces the defect rate, makes mass production more reliable, improves efficiency, and saves costs; at the same time, it also improves the service life of the connector 50.

[0029] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed the preferred embodiment as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery pack comprising a battery cell, a circuit board, and a connector connected between the battery cell and the circuit board, the connector comprising a first connecting structure, a second connecting structure, and a fuse structure connected between the first connecting structure and the second connecting structure, the first connecting structure being connected to the circuit board, and the second connecting structure being connected to the battery cell, characterized in that, The fuse structure comprises a main body and a reinforcing portion protruding from the main body.

2. The battery pack of claim 1, wherein, The reinforcing portion is formed by a stamping process.

3. The battery pack of claim 1, wherein, The first connecting structure comprises a first base and a first welding portion extending from the first base, and the first welding portion is welded to the circuit board; and the second connecting structure comprises a second base and a second welding portion extending from the second base, and the second welding portion is welded to the battery cell.

4. The battery pack of claim 3, wherein, The connecting piece further comprises a first extending portion extending from the first base and a second extending portion extending from the second base, and the first extending portion and the second extending portion oppositely extend and are spaced apart from each other.

5. The battery pack of claim 4, wherein, The first extending portion and the second extending portion are both spaced apart from the fuse structure, and the fuse structure connects the first base and the second base.

6. The battery pack of claim 5, wherein, A first gap is arranged between the fuse structure and the first extending portion, a second gap is arranged between the fuse structure and the second extending portion, and a third gap is arranged between the first extending portion and the second extending portion, and the first gap, the second gap and the third gap are communicated.

7. The battery pack of claim 6, wherein, The first gap and the second gap extend in the same direction and are communicated with each other, and the extending direction of the reinforcing portion is the same as the extending direction of the first gap and the second gap.

8. The battery pack of claim 7, wherein, The length of the reinforcing portion is greater than or equal to the total length of the first gap and the second gap.

9. The battery pack of claim 7, wherein, The extending direction of the third gap intersects with the extending direction of the first gap and the second gap.

10. A battery pack comprising a battery cell, a circuit board, and a connector connected between the battery cell and the circuit board, the connector comprising a first connecting structure, a second connecting structure, and a fuse structure connected between the first connecting structure and the second connecting structure, the first connecting structure being connected to the circuit board, and the second connecting structure being connected to the battery cell, characterized in that, The fuse structure comprises a main body and a reinforcing portion connected to the main body.

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