Battery end socket structure

Abstract

The utility model relates to a battery sealing head structure. The battery sealing head structure comprises a pair of sealing heads which are oppositely arranged, wherein each sealing head is provided with a packaging surface facing the other sealing head; a first groove is formed in the packaging surface, an included angle is formed between the side wall of the first groove and the packaging surface, and a second groove is formed in the bottom surface of the first groove; the length direction of the seal head is the x-axis direction, the width direction of the seal head is the y-axis direction, and the length L1 of the side wall of the first groove in the x-axis direction is 1 / 2-2 / 3 of the width W1 of the tab rubber shoulder. According to the scheme provided by the invention, the glue overflowing condition of the tab glue during packaging can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery head structure. BACKGROUND

[0002] With the development of battery technology, customers have higher and higher requirements for the energy density of batteries, and the size design is more and more limited. With the current general hard sealing method, there are easily encapsulation defects, liquid leakage and other situations, which cause the tab glue to overflow at the tab, and the battery exposed tab glue may appear an external eight shape, thereby increasing the length of the battery tab, affecting the final battery length size, and affecting the energy density of the battery.

[0003] Although a head structure appears on the market, by setting a right-angle step at the corresponding tab glue of the head, the overflow glue situation is improved, but the right-angle step can only slightly improve the overflow glue problem, and the battery exposed tab glue may still appear an external eight shape. CONTENT OF THE UTILITY MODEL

[0004] To solve or partially solve the problems in the related art, the present application provides a battery head structure which can improve the overflow glue situation of tab glue during encapsulation.

[0005] The first aspect of the present application provides a battery head structure, which comprises a pair of heads oppositely arranged, and the head is provided with an encapsulation surface facing the other head;

[0006] The encapsulation surface is provided with a first groove, the side wall of the first groove forms an included angle with the encapsulation surface, and the bottom surface of the first groove is provided with a second groove;

[0007] The length direction of the head is the x-axis direction, the width direction of the head is the y-axis direction, and the length L1 of the side wall of the first groove in the x-axis direction is one-half to two-thirds of the tab glue shoulder width W1.

[0008] Further, the bottom surface length L2 of the second groove is the sum of the tab width W2 and the tab glue shoulder width W1.

[0009] Further, the distance L3 between the side wall of the second groove and the side wall of the first groove is one-sixth of the tab glue shoulder width W1.

[0010] Further, the spacing L4 between the bottom surface of the second groove and the bottom surface of the first groove in the y-axis direction is equal to one-third of the total thickness H1 of the tab glue and the thickness H2 of the tab.

[0011] Further, the spacing L5 between the bottom surface of the first groove and the encapsulation surface in the y-axis direction is equal to one-third of the total thickness of the tab glue and the thickness H1 of the tab.

[0012] Further, the included angle between the side wall of the first groove and the packaging surface is 10-80°.

[0013] Further, the side wall of the second groove forms an included angle with the bottom surface of the first groove.

[0014] Further, the length L6 of the side wall of the second groove in the x-axis direction is one-half to two-thirds of the tab rubber shoulder width W1.

[0015] Further, the side wall of the second groove forms a right angle with the bottom surface of the first groove.

[0016] Further, the first groove is at least two, the second groove is at least two, the first groove is distributed on the head along the x-axis direction, and the second groove corresponds to the first groove one by one.

[0017] The technical scheme provided by the present application can include the following beneficial effects: by forming an included angle between the side wall of the first groove and the packaging surface, the side wall of the first groove is inclined relative to the packaging surface, the side wall of the first groove is inclined relative to the bottom surface of the second groove, the first groove forms a trapezoidal structure, there is more flow space for the tab rubber at the side wall of the first groove, the requirement that the tab is arranged at the center of the second groove can be effectively relaxed, the overflow of the tab rubber is improved, the packaged battery is more likely to meet the requirements of a good product, and for small battery packaging, the trapezoidal first groove can improve the yield of battery packaging; the length L1 of the side wall of the first groove in the x-axis direction is less than or equal to two-thirds of the tab rubber shoulder width W1, which can avoid the situation that the tab rubber cannot fill the entire first groove due to the excessive length of the first groove, prevent the gap between the tab rubber and the aluminum plastic film, and ensure that the tab rubber has sufficient flow space during packaging.

[0018] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout the several views.

[0020] Figure 1 is a structural schematic diagram of a battery head structure shown in an embodiment of the present application;

[0021] Figure 2 is a structural schematic diagram of a tab and tab rubber shown in an embodiment of the present application;

[0022] Figure 3 is another structural schematic view of the battery head structure shown in the embodiments of the present application.

[0023] Figure 4 is a structural schematic view of the battery head structure shown in one of the embodiments of the present application.

[0024] Reference signs: head 1; first groove 2; second groove 3; tab 4; tab rubber 5; encapsulation surface 6. DETAILED DESCRIPTION

[0025] Embodiments of the present application will be described in more detail by referring to the attached drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application is more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0026] It should be understood that although the terms "first", "second", "third", etc. can be used in this application to describe various information, these information should not be limited by these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0027] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0028] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected or integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] To solve the above problems, the battery head structure provided by the embodiments of the present application can improve the overflow of the tab glue during packaging.

[0030] The technical solutions of the embodiments of the present application are described in detail below with reference to the drawings.

[0031] Figure 1 is a structural schematic diagram of the battery head structure shown in the embodiments of the present application; Figure 2 is a structural schematic diagram of the tab and the tab glue shown in the embodiments of the present application.

[0032] Referring to Figure 1 and Figure 2 , the battery head structure includes a pair of heads 1 arranged oppositely, each head 1 is provided with a packaging surface 6 facing the other head 1. The packaging surface 6 is provided with a first groove 2, and the first grooves 2 of the two heads 1 are arranged oppositely. During packaging of the battery, the tab 4 and the tab glue 5 are placed in the two first grooves 2. The side wall of the first groove 2 forms an angle with the packaging surface 6, wherein the opening of the first groove 2 is larger than the bottom surface of the first groove 2. The bottom surface of the first groove 2 is provided with a second groove 3, and the first groove 2 and the second groove 3 can form a two-step structure in cooperation. The opening of the second groove 3 is larger than the bottom surface of the second groove 3, and during packaging of the battery, the tab 4 and the tab glue 5 are placed in the two second grooves 3.

[0033] Taking the length direction of the head 1 as the x-axis direction and the width direction of the head 1 as the y-axis direction, the length L1 of the side wall of the first groove 2 in the x-axis direction is one-half to two-thirds of the shoulder width W1 of the tab glue 5. The shoulder width W1 of the tab glue 5 is greater than or equal to 2.5 mm.

[0034] In order to ensure that the glue on both sides of the tab 4 is symmetrical during packaging of the battery, the tab 4 needs to be arranged at the center of the second groove. The present application forms an angle between the side wall of the first groove 2 and the packaging surface 6, the side wall of the first groove 2 is inclined relative to the packaging surface 6, and the side wall of the first groove 2 is inclined relative to the bottom surface of the second groove, so that the first groove 2 forms a trapezoidal structure. The tab glue 5 has more flowing space at the side wall of the first groove 2, which can effectively relax the requirement that the tab 4 is arranged at the center of the second groove, improve the overflow of the tab glue 5, and make the packaged battery more easily meet the requirements of good products. For packaging of small batteries, the trapezoidal first groove 2 can improve the yield of battery packaging. The length L1 of the side wall of the first groove 2 in the x-axis direction is less than or equal to two-thirds of the shoulder width W1 of the tab glue 5, which can avoid the situation that the tab glue 5 cannot fill the entire first groove 2 due to the excessive length of the first groove 2, prevent the gap between the tab glue 5 and the aluminum plastic film, and ensure that the tab glue 5 has sufficient flowing space during packaging.

[0035] In some embodiments, the length L2 of the bottom surface of the second groove 3 is the sum of the width W2 of the tab 4 and the shoulder width W1 of the tab adhesive 5. Since the tab adhesive 5 needs to be arranged on both opposite sides of the tab 4 during packaging, the total width of the tab 4 and the two tab adhesives 5 is greater than the length L2 of the bottom surface of the second groove 3. During packaging, the tab adhesive 5 can flow in the direction of the x-axis under the extrusion of the sealing head 1, thereby filling the first groove 2. The width W2 of the tab 4 is greater than or equal to 1 mm.

[0036] In some embodiments, the distance L3 between the side wall of the second groove 3 and the side wall of the first groove 2 is one sixth of the shoulder width W1 of the tab adhesive 5. The distance L4 between the bottom surface of the second groove 3 and the bottom surface of the first groove 2 in the y-axis direction is the sum of one third of the total thickness of the tab adhesive 5 and the thickness H1 of the tab 4. The distance L5 between the bottom surface of the first groove 2 and the packaging surface 6 in the y-axis direction is the sum of one third of the total thickness of the tab adhesive 5 and the thickness H1 of the tab 4. The total thickness of the tab adhesive 5 is 0.12-3 mm, the thickness H2 of a single tab adhesive 5 is 0.06-1.5 mm, and the thickness H1 of the tab 4 is 0.06-0.5 mm.

[0037] In some embodiments, the included angle between the side wall of the first groove 2 and the packaging surface 6 is 10-80°.

[0038] In some embodiments, the side wall of the second groove 3 forms an included angle with the bottom surface of the first groove 2. The second groove 3 is in a trapezoidal structure. The trapezoidal structure of the second groove 3 can relax the requirement that the tab 4 is arranged at the center of the second groove. In addition, through the cooperation of the second groove 3 and the first groove 2, the flow space of the tab adhesive 5 during packaging can be further improved, thereby improving the yield of battery packaging.

[0039] In some embodiments, the length L6 of the side wall of the second groove 3 in the x-axis direction is one half to two thirds of the shoulder width W1 of the tab adhesive 5. The length L6 of the side wall of the second groove 3 in the x-axis direction is less than or equal to two thirds of the shoulder width W1 of the tab adhesive 5, which can avoid the situation that the tab adhesive 5 cannot fill the entire first groove 2 due to the excessive length of the second groove 3, thereby preventing the gap between the tab adhesive 5 and the aluminum plastic film. The length L6 of the side wall of the second groove 3 in the x-axis direction is greater than or equal to one half of the shoulder width W1 of the tab adhesive 5, which ensures that the tab adhesive 5 has sufficient flow space during packaging.

[0040] Figure 3 FIG. 3 is another structural schematic diagram of the battery sealing head structure according to an embodiment of the present application.

[0041] Referring to FIG. 4, Figure 3In some embodiments, the side wall of the second groove 3 forms a right angle with the bottom surface of the first groove 2, and the side wall of the second groove 3 forms a right angle with the packaging surface 6. With respect to the trapezoidal second groove 3, the side wall of the second groove 3 forms a right angle with the bottom surface of the first groove 2, which can increase the contact area between the sealing head 1 and the tab rubber 5, make the heat transfer to the tab rubber 5 more uniform, improve the melting property of the tab rubber 5, and make the tab rubber 5 more easily fill the entire first groove 2.

[0042] Figure 4 FIG. 1 is a structural schematic diagram of a battery sealing head structure according to an embodiment of the present application.

[0043] Referring to Figure 4 In some embodiments, the first groove 2 is at least two, and the second groove 3 is at least two. The first grooves 2 are distributed along the x-axis direction on the sealing head 1, and the second grooves 3 correspond to the first grooves 2 one by one. Each first groove 2 corresponds to one tab 4, and the sealing head 1 can simultaneously package multiple tabs 4, thereby improving the production efficiency.

[0044] The solutions of the present application have been described in detail above with reference to the drawings. In the above-described embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments. It should also be known by those skilled in the art that the actions and modules involved in the specification are not necessarily required by the present application. In addition, it can be understood that the steps in the method embodiments of the present application can be adjusted, combined and reduced in sequence according to actual needs, and the modules in the device embodiments of the present application can be combined, divided and reduced according to actual needs.

[0045] The above has described various embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical applications or improvements to the technology in the market of the embodiments, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. A battery head structure, characterized by, The sealing head comprises a pair of sealing heads arranged oppositely, and the sealing head is provided with a sealing surface facing the other sealing head; The sealing surface is provided with a first groove, the side wall of the first groove forms an angle with the sealing surface, and the bottom surface of the first groove is provided with a second groove; The length direction of the sealing head is the x-axis direction, the width direction of the sealing head is the y-axis direction, the length L1 of the side wall of the first groove in the x-axis direction is one half to two thirds of the lug rubber shoulder width W1.

2. The battery head structure of claim 1, wherein: The bottom surface length L2 of the second groove is the sum of the lug width W2 and the lug rubber shoulder width W1.

3. The battery head structure of claim 1, wherein: The distance L3 between the side wall of the second groove and the side wall of the first groove is one sixth of the lug rubber shoulder width W1.

4. The battery head structure of claim 1, wherein: The interval L4 between the bottom surface of the second groove and the bottom surface of the first groove in the y-axis direction is equal to one third of the total thickness of the lug rubber and the thickness H1 of the lug.

5. The battery head structure of claim 1, wherein: The interval L5 between the bottom surface of the first groove and the sealing surface in the y-axis direction is equal to one third of the total thickness H1 of the lug rubber and the thickness H2 of the lug.

6. The battery head structure of claim 1, wherein: The angle between the side wall of the first groove and the sealing surface is 10-80°.

7. The battery head structure of claim 1, wherein: The side wall of the second groove forms an angle with the bottom surface of the first groove.

8. The battery head structure of claim 7, wherein: The length L6 of the side wall of the second groove in the x-axis direction is one half to two thirds of the lug rubber shoulder width W1.

9. The battery head structure of claim 1, wherein: The side wall of the second groove forms a right angle with the bottom surface of the first groove.

10. The battery head structure of claim 1, wherein: The first groove is at least two, the second groove is at least two, the first groove is distributed on the sealing head in the x-axis direction, and the second groove corresponds to the first groove one by one.

Images