Low-cost cylindrical power battery structure
By employing a low-cost design and using structures such as elastic lower plastic and positioning posts to buffer the stress of the current collector, the problem of fatigue fracture of traditional cylindrical battery covers during vibration is solved, improving the stability and safety of the battery, while reducing material costs and the risk of electrolyte leakage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING SHENGSHI PRECISION IND CO LTD
- Filing Date
- 2025-04-10
- Publication Date
- 2026-04-10
AI Technical Summary
Traditional cylindrical battery cover structures suffer from fatigue fractures due to stress concentration at the bending points of the current collector during repeated vibrations, affecting battery stability and safety. Existing solutions are either costly or have limited effectiveness.
The design employs a low-cost approach, using elastic lower plastic and structures such as positioning posts and limiting blocks to buffer stress at the bending points of the manifold, ensuring precise assembly of the manifold and the housing, and improving sealing performance through sealing gaskets and upper plastic.
It significantly reduces stress concentration at the current collector bend, extends battery life, improves safety and energy density, reduces material costs, and reduces the risk of electrolyte leakage.
Smart Images
Figure CN224110334U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power battery cover plate technical field, concretely relates to a low -cost cylindrical power battery structure. BACKGROUND
[0002] In the current battery technology field, especially in the application of cylindrical battery, the traditional cover plate structure design has been one of the key factors affecting the stability and durability of the battery. The cylindrical battery is usually composed of a shell, a roll core, an electrolyte and a current collector plate at both ends, etc. The current collector plate is an important transmission component of the internal current of the battery, and its structure design and material selection are directly related to the overall performance of the battery.
[0003] In the traditional cover plate structure design, the current collector plate is usually connected with other components of the battery through bending. However, in actual application, especially in environments that need to withstand repeated vibrations, such as electric vehicles, mobile devices, etc., this traditional cover plate structure exposes a series of problems. During repeated vibration of the cylindrical battery, the roll core moves up and down within a certain range, which causes the bending part of the current collector plate to be frequently stressed.
[0004] Under the repeated stress, the material at the bending part of the current collector plate gradually changes its microstructure, such as crack initiation and propagation, eventually leading to fatigue fracture. Fatigue fracture not only causes damage to the internal structure of the battery, but also causes a sharp decline in battery performance, and may even cause safety accidents. Therefore, how to solve the problem of fatigue fracture of the bending part of the current collector plate caused by repeated stress during repeated vibration of the cylindrical battery has become an important issue to be solved in the current battery technology field.
[0005] In order to cope with this challenge, the industry has carried out a lot of research and attempts, such as optimizing the material selection of the current collector plate and improving the structure design of the current collector plate. However, these schemes often have the disadvantages of high cost, complex process or limited effect, which are difficult to meet the needs of actual application. Therefore, there is an urgent need for a novel, efficient and cost-effective solution to significantly improve the stability and durability of the cylindrical battery in a repeated vibration environment.
[0006] In summary, the present application aims to provide an improved cylindrical battery cover plate structure, which effectively solves the problem of fatigue fracture of the bending part of the current collector plate caused by stress during repeated vibration, thereby improving the overall performance and safety of the cylindrical battery. UTILITY MODEL CONTENT
[0007] The utility model aims at providing a low -cost cylindrical power battery structure, solves the problem that the positive and negative cover plate contains at least 1-2 pole, the material cost is higher, and the battery energy density is lower.
[0008] The purpose of the utility model can be realized through the following technical schemes:
[0009] A low-cost cylindrical power battery structure, comprising a battery shell, a negative light aluminum sheet is fixedly installed on one side of the battery shell, a positive light aluminum sheet is fixedly installed on the other side of the battery shell, a conductive pole is fixedly installed through the negative light aluminum sheet, a negative current collector is fixedly installed on the inner side of the negative light aluminum sheet, the conductive pole is installed through the negative current collector, and the end size of the conductive pole is greater than the through hole of the negative current collector and the conductive pole, a pole pressing block is arranged between the end of the conductive pole and the negative current collector, a positive current collector is fixedly connected to the inner side of the positive light aluminum sheet, the positive current collector and the negative current collector both extend through the side wall of the battery shell, and a shell boss matched with the battery shell is arranged on the inner periphery of the negative light aluminum sheet and the positive light aluminum sheet.
[0010] Preferably, the outer sides of the negative light aluminum sheet and the positive light aluminum sheet are both provided with pole marks.
[0011] Preferably, the positive light aluminum sheet is provided with an aluminum sheet connecting hole penetrating through.
[0012] Preferably, an upper plastic is fixedly sleeved between the conductive pole and the outer side of the negative light aluminum sheet.
[0013] Preferably, a sealing gasket is sleeved between the conductive pole and the negative light aluminum sheet.
[0014] Preferably, a lower plastic is fixedly arranged on the inner side of the negative light aluminum sheet, and an installation table matched with the negative current collector is fixedly arranged on the lower plastic.
[0015] Preferably, an arc-shaped support boss is arranged on the outer periphery of the lower plastic, and the outer periphery of the support boss is matched with the inner wall of the battery shell.
[0016] Preferably, a plurality of positioning columns are arranged on the inner side of the lower plastic, and a positioning hole matched with the positioning column is arranged on the battery shell.
[0017] Preferably, two groups of limiting blocks for limiting rotation of the negative current collector are fixedly arranged on the installation table.
[0018] Preferably, the lower plastic is made of an elastic material.
[0019] The utility model discloses the beneficial effect:
[0020] (1) the buffer effect of the elastic lower plastic is remarkable to reduce the stress concentration of the current collector bending, prolongs the battery life, and improves the security.
[0021] (2) The utility model discloses negative pole light aluminum sheet adopts single pole structure, and cancels positive pole post simultaneously, can increase the inside space of battery to improve the energy density of battery simultaneously with the reduction of cost.
[0022] (3) The positioning column, the limiting block and the like are designed to ensure the accurate assembly of the current collector plate and the shell and reduce displacement caused by vibration.
[0023] (4) The sealing gasket and the upper plastic double sealing design reduce the leakage risk and adapt to complex working conditions. BRIEF DESCRIPTION OF DRAWINGS
[0024] The utility model will be further described below in combination with the drawings.
[0025] Figure 1 It is the overall structure schematic diagram of a low-cost cylindrical power battery structure of the utility model;
[0026] Figure 2 It is the axonometric structure schematic diagram of a low-cost cylindrical power battery structure of the utility model;
[0027] Figure 3 It is the negative pole light aluminum sheet assembly structure schematic diagram of a low-cost cylindrical power battery structure of the utility model;
[0028] Figure 4 It is the positive pole light aluminum sheet assembly structure schematic diagram of a low-cost cylindrical power battery structure of the utility model;
[0029] Figure 5 It is the negative pole light aluminum sheet sectional structure schematic diagram of a low-cost cylindrical power battery structure of the utility model.
[0030] In the drawing: 1, battery shell; 2, negative pole light aluminum sheet; 3, positive pole light aluminum sheet; 31, aluminum sheet connecting hole; 4, negative pole current collector plate; 5, positive pole current collector plate; 6, conductive pole; 7, upper plastic; 8, lower plastic; 81, support boss; 82, mounting table; 83, positioning column; 84, limiting block; 9, pole pressing block; 101, shell boss; 11, sealing gasket; 12, pole mark. DETAILED DESCRIPTION
[0031] The technical solutions in the embodiments of the application / utility model will be clearly and completely described below in combination with the drawings in the embodiments of the application / utility model. Obviously, the described embodiments are only part of the embodiments of the application / utility model, not all. Based on the embodiments in the application / utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application / utility model.
[0032] In the description of the application / utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, and a particular orientation and operation, therefore, cannot be understood as a limitation on the utility model. In addition, "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 technical features indicated. Therefore, the features limited by "first", "second" can be explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.
[0033] In the description of the application / utility model, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; 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, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0034] Please refer to Figures 1-5 The utility model discloses a low -cost cylindrical power battery structure, including the battery shell 1, one side fixed mounting of battery shell 1 has negative light aluminum sheet 2, the other side fixed mounting of battery shell 1 has positive light aluminum sheet 3, the negative light aluminum sheet 2 is fixedly installed with the conductive pole 6 on the through, the conductive pole 6 is fixedly installed with negative current collector 4 on the inner side of negative light aluminum sheet 2, the conductive pole 6 is installed on negative current collector 4 and is through, and the end size of conductive pole 6 is greater than negative current collector 4 and the through hole of conductive pole 6, be provided with the pole block 9 between the end of conductive pole 6 and negative current collector 4, the inner side fixed connection of positive light aluminum sheet 3 has positive current collector 5, the positive current collector 5 and negative current collector 4 all through the side wall of battery shell 1, the inner side outer periphery of negative light aluminum sheet 2 and positive light aluminum sheet 3 are all provided with the shell boss 101 matched with battery shell 1.
[0035] In an alternative embodiment, the outer side of the negative light aluminum sheet 2 and the positive light aluminum sheet 3 is provided with a pole mark 12.
[0036] It should be noted that the positive and negative poles of the battery are conveniently and accurately judged by the pole mark 12.
[0037] In an alternative embodiment, the positive light aluminum sheet 3 is provided with an aluminum sheet connecting hole 31.
[0038] It should be noted that the aluminum sheet connecting hole 31 is arranged to facilitate wire connection.
[0039] In an optional embodiment, the conductive pole 6 is sleeved with an upper plastic 7 between the outer side of the negative light aluminum sheet 2.
[0040] It should be noted that the arrangement of the upper plastic 7 improves the overall sealing and installation stability of the conductive pole 6.
[0041] In an optional embodiment, a sealing gasket 11 is sleeved between the conductive pole 6 and the negative light aluminum sheet 2.
[0042] It should be noted that the arrangement of the sealing gasket 11 further improves the overall sealing of the top cover.
[0043] In an optional embodiment, a lower plastic 8 is fixedly arranged on the inner side of the negative light aluminum sheet 2, and a mounting table 82 matched with the negative current collecting disc 4 is fixedly arranged on the lower plastic 8.
[0044] It should be noted that the arrangement of the mounting table 82 improves the installation thickness of the negative current collecting disc 4 and ensures installation stability.
[0045] In an optional embodiment, an arc-shaped support boss 81 is arranged on the outer periphery of the lower plastic 8, and the outer periphery of the support boss 81 is matched with the inner wall of the battery shell 1.
[0046] It should be noted that the arrangement of the support boss 81 improves the installation stability and sealing between the lower plastic 8 and the battery shell 1.
[0047] In an optional embodiment, a plurality of positioning columns 83 are arranged on the inner side of the lower plastic 8, and a plurality of positioning holes matched with the positioning columns 83 are arranged on the battery shell 1.
[0048] It should be noted that the arrangement of the positioning columns 83 ensures the installation stability of the lower plastic 8.
[0049] In an optional embodiment, two sets of limiting blocks 84 for limiting the rotation of the negative current collecting disc 4 are fixedly arranged on the mounting table 82.
[0050] It should be noted that the arrangement of the limiting blocks 84 improves the installation stability of the negative current collecting disc 4.
[0051] In an optional embodiment, the lower plastic 8 is made of elastic material.
[0052] It should be noted that the lower plastic 8 will play a buffering role, thereby avoiding fatigue fracture at the bending part of the current collecting disc.
[0053] The utility model discloses a working principle: lower plastic 8 adopts elastic material such as silica gel or rubber, is installed in the negative light aluminum sheet 2 inner side, and is combined with the battery shell 1 inner wall through the support boss 81. When the battery is vibrated, the elastic deformation of lower plastic 8 can absorb the vibration energy, reduce the stress that is transmitted to the negative current collecting disc 4, avoid the fatigue fracture of the bending place because of repeated stress.
[0054] Lower plastic 8 is provided with mounting table 82, positioning column 83 and limiting block 84, is combined with the positioning hole of battery shell 1 through positioning column 83, ensures the installation accuracy of lower plastic 8, limiting block 84 limits the rotation of negative current collecting disc 4, further reduces the mechanical displacement.
[0055] The negative light aluminum sheet 2 adopts single pole design, cancels the traditional positive pole, reduces the material cost, simultaneously improves the sealing property through sealing washer 11 and upper plastic 7, avoids electrolyte leakage.
[0056] The above has carried out the detailed explanation to one embodiment of the utility model, but the content described can only be the preferred embodiment of the utility model, can not be considered for limiting the implementation scope of the utility model. All equal changes and improvements etc. that are made in the utility model application scope still belong to the patent coverage scope of the utility model.
Claims
1. A low cost cylindrical power cell structure, characterized by, The utility model provides a battery, including battery shell (1), one side of battery shell (1) is fixedly installed with negative light aluminum sheet (2), the other side of battery shell (1) is fixedly installed with positive light aluminum sheet (3), the negative light aluminum sheet (2) is fixedly installed with the conductive pole (6) through, the conductive pole (6) is fixedly installed with negative current collector (4) in the inside of negative light aluminum sheet (2), the conductive pole (6) is installed on negative current collector (4) through, and the end size of conductive pole (6) is greater than negative current collector (4) and the through -hole of conductive pole (6), the end of conductive pole (6) is provided with pole pressing block (9) between negative current collector (4), the inside of positive light aluminum sheet (3) is fixedly connected with positive current collector (5), and positive current collector (5) and negative current collector (4) all through the side wall of battery shell (1) that protrude, the inside of negative light aluminum sheet (2) and positive light aluminum sheet (3) all are provided with the shell boss (101) with battery shell (1) cooperation.
2. A low cost cylindrical battery structure according to claim 1, wherein, The outside of the negative light aluminum sheet (2) and the positive light aluminum sheet (3) is provided with a pole mark (12).
3. A low cost cylindrical battery structure according to claim 1, wherein, The positive light aluminum sheet (3) is provided with a through aluminum sheet connecting hole (31).
4. A low cost cylindrical battery structure according to claim 1, wherein, The conductive pole (6) and the outside of the negative light aluminum sheet (2) are fixedly sleeved with an upper plastic (7).
5. A low cost cylindrical battery structure according to claim 1, wherein, The conductive pole (6) and the negative light aluminum sheet (2) are sleeved with a sealing gasket (11).
6. A low cost cylindrical battery structure according to claim 1, wherein, The inside of the negative light aluminum sheet (2) is fixedly provided with a lower plastic (8), and the lower plastic (8) is fixedly provided with a mounting table (82) matched with the negative current collector (4).
7. A low cost cylindrical battery structure according to claim 6, wherein, The outer periphery of the lower plastic (8) is provided with an arc-shaped support boss (81) which is matched with the inner wall of the battery shell (1).
8. A low cost cylindrical battery structure according to claim 7, wherein, The inside of the lower plastic (8) is provided with a plurality of positioning columns (83), and the battery shell (1) is provided with positioning holes matched with the positioning columns (83).
9. A low cost cylindrical battery structure according to claim 8, wherein, The mounting table (82) is fixedly provided with two groups of limiting blocks (84) for limiting rotation of the negative current collector (4).
10. A low cost cylindrical battery structure according to claim 6, wherein, The lower plastic (8) is made of elastic material.