A battery

Abstract

The utility model provides a kind of battery, including electric core and protection plate;The electric core has tab, the electric core head is encapsulated with sequentially connected first side edge, top edge and second side edge, the tab is from top edge and projects, the first side edge, the top edge and the second side edge are enclosed and form head recess;The protection plate connects the tab, and the protection plate includes first body portion inserted in the head recess and second body portion exposed in the head recess;The width of the first body portion along first direction is less than the width of the second body portion, and the first direction is the direction of the first side edge towards the second side edge, a kind of battery provided by the utility model designs the first body portion and the second body portion of protection plate as different width size, so that the assembly requirement of the protection plate in adaptation minimum battery is met, while meeting the layout requirement of other components.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and specifically relates to a battery. Background Technology

[0002] Soft-pack lithium-ion batteries have advantages such as good safety performance, light weight, large capacity and flexible design, and are preferred for use in small electrical products to minimize space occupation.

[0003] For some smaller electrical products, such as wearable headphones, wristbands, or AR products, the size of the compatible pouch lithium-ion batteries must also be relatively small. For example, some pouch lithium-ion batteries on the market have a width of less than 10mm or a maximum width of only 7.86mm. During the production process, to match the size of the head recess, the size of the protection board must be consistent with the size of the head recess to meet assembly requirements. However, due to the small size, the protection board is difficult to accommodate the placement of other components. On the other hand, increasing the overall size of the protection board to make it not limited by the size of the head recess would increase the space occupied by the battery. Summary of the Invention

[0004] To address the shortcomings of the prior art, this utility model provides a battery in which the first and second body portions of the protection board are designed with different widths, so that the protection board can meet the assembly requirements of extremely small batteries while also satisfying the layout requirements of other components.

[0005] The technical effects to be achieved by this utility model are realized through the following technical aspects:

[0006] This utility model provides a battery, including a battery cell and a protection board;

[0007] The battery cell has a tab, and the head of the battery cell is encapsulated with a first side seal, a top seal, and a second side seal connected in sequence. The tab extends from the top seal, and the first side seal, the top seal, and the second side seal surround to form a head groove.

[0008] The protective plate is connected to the electrode tab, and the protective plate includes a first body portion inserted into the head groove and a second body portion exposed in the head groove;

[0009] The width of the first body portion along the first direction is smaller than the width of the second body portion, and the first direction is the direction from the first side seal to the second side seal;

[0010] The first and second body parts of the protection board are designed with different widths, so that the protection board can meet the assembly requirements of extremely small batteries while also meeting the layout requirements of other components.

[0011] In some implementations, the width of the first body portion along the first direction is equal to the distance between the first side seal and the second side seal. Under the limitation of the head groove size, the width of the first body portion is increased as much as possible to meet the component layout requirements.

[0012] In some implementations, there are gaps between the first body part and the first side sealing edge and the second side sealing edge on the opposite sides of the first body part in the first direction, respectively. The design of this gap can increase the connection stability between the protection plate and the battery cell by using the injection molding material in the subsequent injection molding process, and can also ensure that the first body part is inserted into the head groove relatively smoothly.

[0013] In some implementations, the two opposite sides of the second body portion in the first direction are flush with the outer sides of the first side seal and the second side seal, respectively, so that the overall width of the protection plate does not exceed the overall width of the battery cell, thus avoiding increasing the space occupied by the battery.

[0014] In some implementations, the second body portion has a first groove for positioning on both opposite sides in the first direction. During subsequent injection molding, the first groove can be used to position the protective plate, avoiding displacement or deformation caused by injection pressure.

[0015] In some implementations, the first groove is an arc-shaped groove, which increases the pressure resistance of the protective plate and makes the protective plate less prone to damage.

[0016] In some implementations, an FPC is connected to the middle of the side of the second body away from the head groove. The FPC is extended outward from the middle of the protective plate, which not only meets the battery assembly requirements but also facilitates subsequent injection molding operations.

[0017] In some implementations, a first injection molded part is also included, which encloses the head groove and the protective plate, providing insulation protection for the head groove and the protective plate, achieving waterproof and dustproof functions, and increasing their mechanical strength.

[0018] In some implementations, the first injection molded part also covers the connection between the second body and the FPC, ensuring that the electrical connection is insulated and protected, and improving the connection stability between the second body and the FPC.

[0019] In some implementations, a second injection molded part is also included, which encloses the battery cell and the protection plate to provide insulation protection for the battery as a whole, achieve waterproof and dustproof functions, increase its mechanical strength, and make the product shape regular and easy to assemble.

[0020] In summary, this utility model has at least the following advantages:

[0021] 1. The present invention provides a battery in which the first body part and the second body part of the protection plate are designed with different widths. The first body part is smaller in width and can be inserted into the head groove to meet the assembly requirements of the head groove. The second body part is exposed in the head groove and its width is not limited, so as to meet the layout requirements of other components.

[0022] 2. The battery provided by this utility model can meet the assembly requirements of extremely small batteries while also satisfying the layout requirements of other components. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a battery provided in Embodiment 1 of this utility model;

[0024] Figure 2 This is a front view of a battery provided in Embodiment 1 of this utility model;

[0025] Figure 3 This is a schematic diagram of the battery cell structure provided in Embodiment 1 of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the protective plate provided in Embodiment 1 of this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of a battery provided in Embodiment 2 of this utility model;

[0028] Figure 6 This is a schematic diagram of the structure of a battery provided in Embodiment 3 of this utility model;

[0029] Figure 7 This is a schematic diagram of the structure of another battery provided in Embodiment 3 of this utility model;

[0030] Marked in the image:

[0031] 100. Battery cell; 110. Electrode tab; 120. First side seal; 130. Top seal; 140. Second side seal;

[0032] 200, Protective plate; 210, First body part; 220, Second body part; 221, First groove;

[0033] 300, FPC;

[0034] 400. First injection molded part;

[0035] 500, Second injection molded part;

[0036] X, the first direction. Detailed Implementation

[0037] To facilitate understanding of the present invention, a more comprehensive description will be given below in conjunction with the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0038] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0039] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0041] Example 1:

[0042] Please see Figures 1-4 This embodiment provides a battery, including a battery cell 100 and a protection board 200. The battery is a soft-pack lithium-ion battery, which is suitable for some small-sized electrical products, especially wearable headphones, wristbands or AR products. Of course, it can also be applied to larger electrical products, but this embodiment does not limit it.

[0043] Typically, the battery cell 100 has a tab 110, an electrode assembly, and a housing. The electrode assembly is disposed inside the housing, and the tab 110 is connected to the electrode assembly and protrudes outside the housing. At the same time, the tab 110 protrudes from the head of the battery cell 100.

[0044] The head of the battery cell 100 is encapsulated with a first side seal 120, a top seal 130, and a second side seal 140 connected in sequence. It can be understood that the first side seal 120 extends from the first side of the battery cell 100 toward the outside of the head of the battery cell 100, and the second side seal 140 extends from the second side of the battery cell 100 toward the outside of the head of the battery cell 100. The first side seal 120 and the second side seal 140 are in a relative position relationship. Similarly, the top seal 130 extends from the front of the battery cell 100 toward the outside of the head of the battery cell 100. It should be noted that the tab 110 extends from the top seal 130, that is, the tab 110 is exposed at the head of the battery cell 100 and exposed at the top seal 130, so as to establish a connection relationship between the tab 110 and the protection plate 200. The first side seal 120, the top seal 130, and the second side seal 140 together form a head groove.

[0045] The protection board 200 is connected to the tab 110. Understandably, the protection board 200 is provided with pads that can be used to connect with the tab 110. Typically, the tab 110 includes a positive tab 110 and a negative tab 110. Correspondingly, the protection board 200 is provided with a first pad for connecting with the positive tab 110 and a second pad for connecting with the negative tab 110. By inserting the protection board 200 into the head groove, the first pad and the second pad on the protection board 200 can be attached to the positive tab 110 and the negative tab 110 respectively, thereby improving the connection stability.

[0046] The protection plate 200 includes a first body portion 210 inserted into the head groove and a second body portion 220 exposed in the head groove. Here, it can be understood that the first body portion 210 and the second body portion 220 are connected and formed into an integrated protection plate 200. The first pad is distributed on both the first body portion 210 and the second body portion 220, and the second pad is also distributed on both the first body portion 210 and the second body portion 220. Of course, in this example, the specific positions of the first pad and the second pad on the protection plate 200 are not limited, as long as they are fitted and connected to the positions of the positive electrode tab 110 and the negative electrode tab 110.

[0047] The width of the first body portion 210 along the first direction X is smaller than the width of the second body portion 220, where the first direction X is the direction from the first side sealing edge 120 toward the second side sealing edge 140. (Refer to...) Figure 2 The X direction is the first direction in this example.

[0048] As is known, the first body portion 210 is used to insert into the head recess. Therefore, the maximum width of the first body portion 210 in the first direction X is less than or equal to the width of the head recess, while the second body portion 220 is exposed in the head recess. That is, the width of the second body portion 220 in the first direction X is not limited by the head recess. Therefore, it can be designed to have a width greater than the width of the head recess. In this example, the width of the first body portion 210 in the first direction X is less than the width of the second body portion 220.

[0049] In this example, the first body portion 210 and the second body portion 220 of the protection plate 200 are designed with different widths. The first body portion 210 is smaller in width and can be inserted into the head groove to meet the assembly requirements of the head groove. The second body portion 220 is exposed in the head groove and its width is not limited, which can meet the layout requirements of other components.

[0050] In some embodiments, the width of the first body portion 210 along the first direction X is equal to the distance between the first side sealing edge 120 and the second side sealing edge 140. Under the limitation of the head groove size, the width of the first body portion 210 is increased as much as possible to meet the component layout requirements.

[0051] To ensure that the first body portion 210 can be inserted into the head recess and to avoid increasing the overall length of the battery, the maximum width of the first body portion 210 along the first direction X can be set to be equal to the distance between the first side sealing edge 120 and the second side sealing edge 140. This allows the opposite sides of the first body portion 210 to be inserted into the head recess along the first side sealing edge 120 and the second side sealing edge 140 during assembly. For example, if the distance between the first side sealing edge 120 and the second side sealing edge 140 is 10mm, then the width of the first body portion 210 is 10mm; if the distance between the first side sealing edge 120 and the second side sealing edge 140 is 7.86mm, then the width of the first body portion 210 is 7.86mm.

[0052] In other embodiments, the first body portion 210 has gaps between its two opposite sides in the first direction X and the first side sealing edge 120 and the second side sealing edge 140, respectively. The design of these gaps can increase the connection stability between the protection plate 200 and the battery cell 100 by using the injection molding material during the subsequent injection molding process, and can also ensure that the first body portion 210 is inserted into the head groove relatively smoothly.

[0053] In some embodiments, the two opposite sides of the second body portion 220 in the first direction X are flush with the outside of the first side sealing edge 120 and the outside of the second side sealing edge 140, respectively, so that the overall width of the protection plate 200 does not exceed the overall width of the cell 100, thus avoiding increasing the space occupied by the battery.

[0054] It is known that the width of the first body portion 210 in the first direction X is limited by the distance between the first side sealing edge 120 and the second side sealing edge 140. However, the second body portion 220 is exposed in the head groove during assembly. Therefore, its width in the first direction X is not limited by the distance between the first side sealing edge 120 and the second side sealing edge 140. The width of the second body portion 220 can be appropriately increased according to the requirements to meet the layout requirements of more components. However, in some assembly requirements, in order to avoid increasing the overall width of the battery cell 100, the opposite two sides of the second body portion 220 in the first direction X are designed to be flush with the outside of the first side sealing edge 120 and the outside of the second side sealing edge 140, respectively. Here, the portion of the second body portion 220 that exceeds the width of the first body portion 210 is equivalent to the thickness of the first side sealing edge 120 and the second side sealing edge 140.

[0055] Example 2:

[0056] This embodiment makes further structural optimizations based on Embodiment 1. Please refer to... Figures 1-4 Based on the above Figure 5 .

[0057] The second body part 220 has a first groove 221 for positioning on both opposite sides in the first direction X. In the subsequent injection molding process, the first groove 221 can be used to position the protective plate 200 to avoid displacement or deformation caused by injection pressure.

[0058] In some examples, the first groove 221 is an arc-shaped groove. The arc-shaped groove can increase the pressure resistance of the protective plate 200, making the protective plate 200 less prone to damage. In the specific positioning process, a positioning protrusion matching the first groove 221 can be set at the positioning fixture to limit the positioning protrusion within the first groove 221, so that the protective plate 200 will not move during the injection molding process or subsequent operations, ensuring the stability and accuracy of the operation.

[0059] In addition, the use of arc-shaped grooves can reduce the risk of deformation of the protective plate 200 caused by the ejector pin directly pressing on the protective plate 200 during low-pressure injection molding, thereby improving product quality.

[0060] In some embodiments, the FPC300 is connected to the middle of the side of the second body 220 away from the head groove. The FPC300 is extended outward from the middle of the protective plate 200, which not only meets the battery assembly requirements, but also facilitates subsequent injection molding operations.

[0061] Normally, the FPC300 extends outward from the side of the protection plate 200 away from the head groove. However, in this example, to match the battery assembly requirements, the FPC300 is connected to the middle of the second body part 220 on the side away from the head groove. In this way, when the protection plate 200 is clamped and positioned by the first groove 221, it will not be affected by the positioning caused by the position of the FPC300, which facilitates operation.

[0062] Example 3:

[0063] This embodiment makes further structural optimizations based on embodiment 2. Please refer to... Figures 1-5 Based on the above Figures 6-7 .

[0064] like Figure 6 As shown, in this embodiment, the battery also includes a first injection molded part 400, which wraps around the head groove and the protective plate 200, providing insulation protection for the head groove and the protective plate 200, achieving waterproof and dustproof functions, and increasing its mechanical strength.

[0065] The head portion of the battery, namely the head groove and the protection plate 200, is sealed by low-pressure injection molding, so that the tab 110 is completely covered, eliminating the risk of short circuit due to contact with metal particles, achieving waterproof and dustproof functions, while also reducing the need for multiple wrapping steps, reducing labor and equipment, and saving production costs.

[0066] The first injection molded part 400 also covers the connection between the second body part 220 and the FPC 300, ensuring that the electrical connection is insulated and protected, and improving the connection stability between the second body part 220 and the FPC 300.

[0067] like Figure 7 As shown, in some embodiments, the battery also includes a second injection molded part 500, which encloses the battery cell 100 and the protection plate 200, providing insulation protection for the entire battery, achieving waterproof and dustproof functions, while also increasing its mechanical strength and making the product shape regular and easy to assemble.

[0068] The above description is merely an example and illustration of the structure of this invention, and while the description is specific and detailed, it should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these obvious substitutions all fall within the protection scope of this invention.

Claims

1. A battery, characterized in that, Includes battery cells (100) and protection boards (200); The battery cell (100) has a tab (110), and the head of the battery cell (100) is encapsulated with a first side seal (120), a top seal (130), and a second side seal (140) connected in sequence. The tab (110) extends from the top seal (130), and the first side seal (120), the top seal (130), and the second side seal (140) surround to form a head groove. The protective plate (200) is connected to the electrode tab (110). The protective plate (200) includes a first body portion (210) inserted into the head groove and a second body portion (220) exposed in the head groove. The width of the first body portion (210) along the first direction (X) is smaller than the width of the second body portion (220), and the first direction (X) is the direction from the first side seal (120) toward the second side seal (140).

2. The battery according to claim 1, characterized in that, The width of the first body portion (210) along the first direction (X) is equal to the distance between the first side seal (120) and the second side seal (140).

3. The battery according to claim 1, characterized in that, There are gaps between the first body part (210) and the first side seal (120) and the second side seal (140) on the opposite sides in the first direction (X).

4. The battery according to any one of claims 1-3, characterized in that, The two opposite sides of the second body part (220) in the first direction (X) are flush with the outside of the first side seal (120) and the outside of the second side seal (140), respectively.

5. The battery according to claim 1, characterized in that, The second body part (220) has a first groove (221) for positioning on both opposite sides in the first direction (X).

6. The battery according to claim 5, wherein the first groove (221) is an arc-shaped groove.

7. The battery according to claim 1, characterized in that, The second body part (220) is connected to the middle of the side away from the head groove by an FPC (300).

8. The battery according to claim 7, characterized in that, It also includes a first injection molded part (400) that encloses the head groove and the protective plate (200).

9. The battery according to claim 8, characterized in that, The first injection molded part (400) also covers the connection between the second body part (220) and the FPC (300).

10. The battery according to claim 7, characterized in that, It also includes a second injection molded part (500) that encloses the battery cell (100) and the protection plate (200).

Images