Collecting plate and battery
By designing through holes and hollowed-out grooves on the current collector, the problems of insufficient space occupied by the boss structure and insufficient conductive area were solved, thereby improving battery energy density and super-fast charging performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-04-10
AI Technical Summary
The boss structure of the existing current collector occupies the effective space of the core, which affects the improvement of battery energy density and the insufficient conductive area, resulting in poor performance of super-fast charging batteries.
Design a current collector with a central through hole and circumferentially hollowed-out grooves to form a large-area welding part, increasing the conductive area, and saving internal battery space through a boss-free structure.
It achieves a tight fit between the current collector and the core tab, battery cover or casing, increases connection stability and conductive area, improves battery energy density and super-fast charging current transmission performance, and simplifies the production process and improves production efficiency.
Smart Images
Figure CN224110434U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field especially relates to a current collection disc and battery. BACKGROUND
[0002] The cover plate of the cylindrical battery is provided with a winding core and a current collection disc, and in the production and manufacturing process of the battery, the current collection disc is generally placed on the end face of the winding core, and then one end face of the current collection disc is welded with the winding core to form an integral whole, and the other end face of the current collection disc is also connected with the positive pole through welding, so as to form a current path.
[0003] The current collection disc is provided with a boss structure to ensure the adhesion of the current collection disc and the winding core tab, thereby ensuring the welding effect, however, the boss structure occupies the effective space of the winding core, which affects the improvement of the energy density of the battery, and due to the small area of the boss, the conductive area is insufficient, which leads to poor battery performance when designing a super fast charging battery.
[0004] Therefore, it is necessary to design a current collection disc and battery to solve the above problems. SUMMARY
[0005] The utility model discloses a kind of current collection disc and battery, to solve the boss structure of current collection disc in the background art described above It leads to the effective space of winding core being occupied, which affects the improvement of the energy density of the battery, and due to the small area of the boss, the conductive area is insufficient, which leads to poor battery performance when designing a super fast charging battery.
[0006] To achieve the above object, the utility model provides the following technical scheme:
[0007] A current collection disc includes a body;
[0008] A through hole is formed in the center of the body, and a plurality of hollow grooves are formed circumferentially around the through hole.
[0009] The connection part is formed between one end of the hollow groove and the through hole, and the other end penetrates the body along the radial direction.
[0010] The area of the first welding part is greater than the area of the second welding part.
[0011] Preferably, the through hole is a circular through hole or a triangular through hole.
[0012] Preferably, the circular through hole has a plurality of arc-shaped slot holes uniformly formed on the hole wall, and the number of arc-shaped slot holes is the same as the number of hollow grooves.
[0013] Preferably, the arc-shaped slot hole is a third of a circle.
[0014] Preferably, the number of the hollowed-out slots is three.
[0015] Preferably, the body is in a disc structure.
[0016] Preferably, the thickness of the body is 0.1-1mm.
[0017] A battery comprising the current collector plate according to any one of the above.
[0018] Compared with the prior art, the battery has the advantages that:
[0019] I. By providing the linear hollowed-out slots on the body of the current collector plate in the radial direction, the welding part has good upper and lower buffer folding performance, so that the current collector plate can be tightly attached to the core tab, the battery cover plate or the shell, the connection area is maximized, the connection stability is ensured, the welding part is welded with the battery cover plate or the shell and the core tab in different areas, and the conductive area is increased; the battery using the current collector plate has no boss structure, the longitudinal space inside the battery can be saved, and the energy density of the battery and the current transmission performance of the super-fast charging battery are improved.
[0020] II. The current collector plate has simple structure and is easy to process, and is suitable for promotion. DETAILED DESCRIPTION
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0022] Fig. 1 A structure diagram of the circular through-hole current collector plate provided by the embodiment of the present application is shown in the figure.
[0023] Fig. 2 A structure diagram of the triangular through-hole current collector plate provided by the embodiment of the present application is shown in the figure.
[0024] The figure shows that: 10, the body; 101, the welding part; 1011, the first welding part; 1012, the second welding part; 102, the connecting part; 20, the through hole; 201, the arc-shaped slot hole; 30, the hollowed-out slot. DETAILED DESCRIPTION
[0025] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature and not limiting.
[0026] In the description of the present application, it needs to be understood that the terms "center", "thickness", "upper", "lower", "inner", "outer", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0027] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0028] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication 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] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.
[0030] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0031] As Figs. 1-2 The utility model discloses an embodiment provides a current collecting disc, including the body 10, the body 10 center is equipped with the through -hole 20, the through -hole 20 is evenly equipped with a plurality of hollow slot 30 around, and the welding portion 101 is formed between any two adjacent hollow slot 30, and the welding portion 101 includes the first welding portion 1011 and the second welding portion 1012, and the first welding portion 1011 and the second welding portion 1012 are in turn circumferential around the outside of through -hole 20 from inside to outside;
[0032] Among them, the hollow slot 30 one end and the through -hole 20 between form the connecting portion 102, and the other end penetrates the body 10 along the radial direction;
[0033] The area of first welding portion 1011 is greater than the area of second welding portion 1012, so as to increase the conductive area.
[0034] By being equipped with the linear hollow slot 30 that penetrates the body 10 along the radial direction on the body 10 of current collecting disc, make the welding portion 101 have good up and down buffer folding performance, so that current collecting disc can be closely fitted with the core tab, battery cover or shell, realize the maximum of connecting area area, increase the conductive area, guarantee the connection stability, the current collecting disc structure is simple, easy to process, is suitable for promotion.
[0035] Further, the through -hole 20 can be circular through -hole or triangular through -hole, it needs to be explained that, the triangular through -hole is equilateral triangle.
[0036] Specifically, when the current collecting disc is circular through -hole current collecting disc, the hole wall of through -hole 20 is evenly equipped with a plurality of arc slot holes 201, the number of arc slot holes 201 is same with the number of hollow slot 30, is used to position hollow slot 30, prevents hollow slot 30 displacement in the use process, affects the use of battery, when the current collecting disc is triangular through -hole current collecting disc, three apexes of through -hole 20 can be used to position hollow slot 30.
[0037] More specifically, the arc slot hole 201 is one third of a circle, so that the welding space is large enough to ensure the stability of welding.
[0038] In the embodiment, the number of hollow slot 30 is three, when the current collecting disc is circular through -hole current collecting disc, the arc slot hole 201 on the hole wall of through -hole 20 is also three, three hollow slot 30 can form three welding portions 101, so that the current collecting disc forms three petal type structures, and each petal is fitted with the core tab, battery cover or shell respectively, and the stability of triangle is used to further ensure the firmness of connection.
[0039] Since the external profile of the current collecting disc body 10 generally matches the internal profile of the cylindrical battery shell, and the shell of the cylindrical battery is in a cylindrical shape, the current collecting disc body 10 in the embodiment is also in a disc-shaped structure.
[0040] In the application process of the current collecting disc, the thickness of the current collecting disc has a significant influence on the performance of the battery, if the current collecting disc is too thin, the conduction of the current can be limited, resulting in the performance of the battery being reduced, and if the current collecting disc is too thick, the weight and cost of the battery can be increased, in the embodiment, the thickness of the body 10 is between 0.1 and 1 mm, which is the best.
[0041] The utility model further provides a battery, including any one of the current collecting disc as described above.
[0042] In use, the tab of the winding core is welded and connected with the first welding part 1011, and the battery cover plate or shell is welded and connected with the second welding part 1012.
[0043] Since the current collecting disc has no boss structure, the longitudinal space inside the battery can be saved, the effective space of the winding core and the contact surface of the current collecting disc are increased, and the improvement of the energy density of the battery and the current transmission performance of the super-fast charging battery are ensured.
[0044] It should be noted that the current collecting disc with the boss structure in the prior art needs to be distinguished between the front and back surfaces in the production process, which will affect the efficiency of the high-speed production line, and the current collecting disc in the application does not need to be distinguished between the front and back surfaces, thereby ensuring the production efficiency.
[0045] Finally, it should be noted that: the above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A current collecting plate comprising a body (10), characterized in that: a through hole (20) is formed in the center of the body (10), a plurality of hollow grooves (30) are uniformly formed around the through hole (20), and a welding portion (101) is formed between any two adjacent hollow grooves (30); the welding portion (101) comprises a first welding portion (1011) and a second welding portion (1012), and the first welding portion (1011) and the second welding portion (1012) are circumferentially arranged outside the through hole (20) from inside to outside; wherein a connecting portion (102) is formed between one end of the hollow groove (30) and the through hole (20), and the other end of the hollow groove (30) penetrates the body (10) along the radial direction; the area of the first welding portion (1011) is greater than the area of the second welding portion (1012).
2. The current plate of claim 1, wherein: The through hole (20) is a circular through hole or a triangular through hole.
3. The current plate of claim 2, wherein: The hole wall of the circular through hole is uniformly provided with a plurality of arc-shaped groove holes (201), and the number of the arc-shaped groove holes (201) is the same as that of the hollow grooves (30).
4. The current plate of claim 3, wherein: The arc-shaped groove hole (201) is one-third of a circle.
5. The current plate of claim 1, wherein: The number of the hollow grooves (30) is three.
6. The current plate of claim 1, wherein: The body (10) has a disc structure.
7. The current plate of claim 1, wherein: The thickness of the body (10) is 0.1-1 mm.
8. A battery, characterized by The current collecting plate according to any one of claims 1-7 is provided.