Cylindrical battery and electric device
By using insulating plastic parts to replace part of the insulating film in cylindrical batteries to form a complete insulating structure, the problems of space waste and increased number of components in the insulating structure are solved, achieving higher space utilization and cost reduction.
Patent Information
- Application Number
- CN202422547658.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-10-22
AI Technical Summary
The insulation structure of existing cylindrical batteries leads to space waste and an increase in the number of components, especially the overlap problem at the connection between the insulating film and the insulating plastic.
Insulating plastic parts are used to replace part of the insulating film, which is set between the shell and the battery cell and covers the rest of the battery cell periphery to form a complete insulating structure, reduce the length and overlap of the insulating film, and reduce the number of parts.
It improves space utilization, reduces component size and manufacturing costs, and enhances insulation effect and safety.
Smart Images
Figure CN223401867U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a cylindrical battery and an electrical device. Background Art
[0002] In the field of battery technology, batteries are often divided into cylindrical batteries, square batteries and soft-pack batteries. Cylindrical batteries generally include a shell, a pole, a battery cell and an insulating part. One end of the shell is closed and the other end is provided with a through hole. The pole is sealed and insulated in the through hole. The battery cell is arranged in the shell, and the end of the battery cell and the shell where the pole is installed is provided with insulating plastic. There are several insulating films between the battery cell and the shell to achieve insulation between the pole and the battery cell body, as well as insulation between the battery cell body and the inner wall of the shell. The insulating film is generally divided into three sections: upper, middle and lower, to cover the outer periphery of the entire battery cell. This also causes partial overlap at the connection between the lower insulating film and the insulating plastic, which wastes a certain amount of space and structure.
[0003] Therefore, there is an urgent need for a cylindrical battery and an electrical device to solve the above technical problems. Utility Model Content
[0004] One purpose of the present utility model is to provide a cylindrical battery that can simplify the insulation structure, improve the space utilization of the cylindrical battery, and reduce the number of parts.
[0005] To achieve this purpose, the present invention adopts the following technical solutions:
[0006] A cylindrical battery comprises a shell, a pole, a cell, an insulating film and an insulating plastic part; one end of the shell is closed, the other end is sealed and insulated with the pole, the cell is arranged in the shell, the pole is conductively connected to the pole piece of the cell, the insulating film is arranged on a part of the periphery of the cell, the insulating plastic part is arranged between the other end of the shell and the cell, and covers the rest of the periphery of the cell, the insulating plastic part and the insulating film are connected to form an insulating structure, and the pole is passed through the insulating plastic part.
[0007] Optionally, the insulating plastic part includes:
[0008] A plastic bottom wall is provided between the other end of the housing and the battery core, and the plastic bottom wall is used for insulation between the inner wall of the other end of the housing and the battery core;
[0009] The plastic side wall is connected to the plastic bottom wall and is arranged at an angle with the plastic bottom wall. The plastic side wall is arranged between the inner peripheral wall of the shell and the battery core to insulate the two.
[0010] Optionally, the angle between the plastic side wall and the plastic bottom wall is an obtuse angle, so that a side of the plastic side wall away from the plastic bottom wall forms a bell mouth.
[0011] Optionally, a plurality of notches are formed along the circumferential direction on a side of the plastic side wall close to the bell mouth.
[0012] Optionally, the length of the longitudinal section of the plastic side wall is A, and A≤10 mm.
[0013] Optionally, the thickness of the plastic side wall decreases from one side where the plastic side wall is connected to the plastic bottom wall toward the other side component.
[0014] Optionally, the minimum thickness of the plastic side wall is B, 0.15 mm ≤ B ≤ 0.2 mm.
[0015] Optionally, the insulating plastic part is provided with a through hole, and the pole is passed through the through hole.
[0016] Optionally, the insulating plastic part is a heat-resistant insulating structure.
[0017] Another object of the present invention is to provide an electrical device comprising the cylindrical battery described in any of the above schemes, wherein the electrical device can simplify the insulation structure, improve the space utilization of the cylindrical battery, and reduce the number of components.
[0018] Beneficial effects of the utility model:
[0019] The utility model provides a cylindrical battery and an electrical device, in which an insulating plastic part is arranged between the other end of the shell and the battery cell and covers the rest of the periphery of the battery cell, thereby replacing a part of the insulating film on the periphery of the battery cell in the prior art, shortening the length of the insulating film so that the insulating film covers a part of the periphery of the battery cell, thereby connecting the insulating plastic part and the insulating film to form a complete insulating structure without causing problems such as excessive overlap between the insulating film and the insulating plastic part, thereby reducing the occupied space of the insulating structure formed by the insulating film and the insulating plastic part, improving space utilization, reducing the size of components, and reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is an axonometric view of a cylindrical battery provided by a specific embodiment of the present utility model;
[0021] Figure 2 This is an exploded view of a cylindrical battery provided by a specific embodiment of the present utility model with part of the structure hidden;
[0022] Figure 3 This is an axonometric view of an insulating plastic part provided in a specific embodiment of the present utility model;
[0023] Figure 4 This is a cross-sectional view of an insulating plastic part provided by a specific embodiment of the present utility model;
[0024] Figure 5 It is a cross-sectional view of a cylindrical battery provided by a specific embodiment of the present utility model;
[0025] Figure 6 yes Figure 5 A partial enlarged view of point A in the middle.
[0026] In the picture:
[0027] 10. Housing; 11. Via hole;
[0028] 20. Pole;
[0029] 30. Insulating plastic part; 301. Bell mouth; 31. Plastic bottom wall; 311. Through hole; 32. Plastic side wall; 321. Notch;
[0030] 40. Upper plastic parts; 50. Sealing ring; 60. Heat-resistant ceramics. DETAILED DESCRIPTION
[0031] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.
[0032] In the description of this utility model, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0034] In the description of this embodiment, the terms "upper," "lower," "left," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.
[0035] Refer to the following Figures 1 to 6 The utility model introduces a cylindrical battery and an electrical device.
[0036] Please refer to Figure 1 and Figure 2 This embodiment provides a cylindrical battery, which includes a shell 10, a pole 20, a battery cell, an insulating film and an insulating plastic part 30; one end of the shell 10 is closed, and the other end is sealed and insulated with the pole 20, the battery cell is arranged in the shell 10, the pole 20 is conductively connected to the electrode of the battery cell, the insulating film is arranged on a part of the periphery of the battery cell, the insulating plastic part 30 is arranged between the other end of the shell 10 and the battery cell, and covers the rest of the periphery of the battery cell, the insulating plastic part 30 and the insulating film are connected to form an insulating structure, and the pole 20 is passed through the insulating plastic part 30.
[0037] The cylindrical battery in this embodiment replaces a portion of the insulating film on the periphery of the battery cell in the prior art by setting the insulating plastic part 30 between the other end of the shell 10 and the battery cell and covering the remaining portion of the periphery of the battery cell. The length of the insulating film is shortened so that the insulating film covers a portion of the periphery of the battery cell, thereby connecting the insulating plastic part 30 with the insulating film to form a complete insulating structure without causing problems such as excessive overlap between the insulating film and the insulating plastic part 30. This reduces the space occupied by the insulating structure formed by the insulating film and the insulating plastic part 30, improves space utilization, reduces the size of components, and reduces manufacturing costs.
[0038] Please refer to Figure 3 and Figure 4 Specifically, the insulating plastic component 30 includes a plastic bottom wall 31 and a plastic side wall 32. The plastic bottom wall 31 is disposed between the other end of the housing 10 and the battery cell, and is used to insulate the inner wall of the other end of the housing 10 from the battery cell. The plastic side wall 32 is connected to the plastic bottom wall 31 and is disposed at an angle thereto. The plastic side wall 32 is disposed between the inner peripheral wall of the housing 10 and the battery cell to insulate the two. This arrangement allows the insulating plastic component 30 to not only insulate the inner wall of the other end of the housing 10 from the battery cell, but also to cover the rest of the outer periphery of the battery cell, thereby insulating it from the inner peripheral wall of the housing 10.
[0039] In some embodiments, the thickness of the plastic bottom wall 31 is 0.7 mm, which can achieve its insulation properties and strength.
[0040] Optionally, the angle between the plastic side wall 32 and the plastic bottom wall 31 is an obtuse angle, so that a trumpet mouth 301 is formed on the side of the plastic side wall 32 away from the plastic bottom wall 31, which facilitates the placement of the battery cell into the shell after it is installed, and plays a guiding role for the placement of part of the battery cell into the insulating plastic part 30, avoiding installation interference problems caused by the shrinkage of the plastic side wall 32, reducing the occurrence of problems such as bending of the plastic side wall 32 that are prone to occur during the placement process, and improving installation reliability.
[0041] Optionally, the angle between the plastic side wall 32 and the plastic bottom wall 31 is α, and α>95°. This arrangement makes it easier to place the battery cell.
[0042] In some embodiments, a plurality of notches 321 are circumferentially formed on one side of the plastic sidewall 32 close to the bell mouth 301 to facilitate the extension of the plastic sidewall 32 and control the angle between the plastic sidewall 32 and the plastic bottom wall 31 .
[0043] In some embodiments, the length of the longitudinal section of the plastic sidewall 32 is A, where A≤10 mm, which is sufficient to cover a portion of the outer wall of the battery cell without being too large to cause inconvenience in installation.
[0044] In some embodiments, the thickness of the plastic side wall 32 is gradually reduced from one side where the plastic side wall 32 is connected to the plastic bottom wall 31 toward the other side. This configuration allows the plastic side wall 32 to become thinner as it extends outward, thereby reducing the occupied area while also achieving the formation of the bell mouth 301.
[0045] Optionally, the minimum thickness of the plastic side wall 32 is B, 0.15 mm ≤ B ≤ 0.2 mm, which can ensure that the plastic side wall 32 will not be too thin to cause material shortage or tearing during the molding process, nor will it be too thick to reduce space utilization.
[0046] In some embodiments, the insulating plastic part 30 is provided with a through hole 311, and the pole 20 is passed through the through hole 311, which facilitates the electrical connection between the pole 20 and the battery cell, and realizes the insulation between the pole 20 and the inner wall of one end of the cylindrical battery where the pole 20 is installed.
[0047] In some embodiments, the insulating plastic component 30 is a heat-resistant insulating structure, which avoids the problem of burning caused by high heat and causing short circuit, thereby improving the safety of the cylindrical battery.
[0048] Optionally, the insulating plastic member 30 may be made of at least one of PP (polypropylene), TPE (thermoplastic elastomer), PPS (polyphenylene sulfide), and LCP (liquid crystal polymer), all of which are high-temperature resistant insulating materials. Specifically, the insulating plastic member 30 may be formed by injection molding or die-cutting the high-temperature resistant insulating material.
[0049] Please refer to Figure 5 and Figure 6 In some embodiments, the pole 20 includes an upper pole 20 and a lower pole 20, and an upper plastic part 40 is provided between the upper pole 20 and the outer wall of one side of the shell 10 to insulate the upper pole 20 from the shell 10, and at least a portion of the insulating plastic part 30 is provided between the lower pole 20 and the inner wall of one side of the shell 10, wherein the upper pole 20 is used for external electrical connection, and the lower pole 20 is used for internal electrical connection with the battery cell to realize the electrical transmission function of the pole 20.
[0050] Optionally, the cylindrical battery further includes a sealing ring 50 . A through hole 11 is provided on one side of the shell 10 . The sealing ring 50 is disposed between the outer periphery of the pole 20 and the wall of the through hole 11 , thereby enabling the pole 20 to be sealed and penetrated into the shell 10 .
[0051] Optionally, the cylindrical battery further includes a heat-resistant ceramic 60, which is disposed between the upper plastic part 40 and the end face of the housing 10 to provide heat resistance between the upper electrode 20 and the housing 10. The heat-resistant ceramic 60 and the insulating plastic part 30 also work together to isolate heat from the electrode 20 and the housing 10.
[0052] This embodiment also provides an electrical device comprising the cylindrical battery described in any of the above-mentioned solutions. This device possesses all the beneficial effects of the aforementioned cylindrical batteries and is not further described here. Furthermore, the electrical device can be an electric bicycle, electric vehicle, hybrid vehicle, ship, energy storage device, or the like, as long as it uses electricity as its energy source. This description is not further elaborated here.
[0053] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. Cylindrical battery, characterized in that, The invention comprises a shell (10), a pole (20), a battery cell, an insulating film and an insulating plastic part (30); one end of the shell (10) is closed, and the other end is sealed and insulated with the pole (20) therethrough; the battery cell is arranged in the shell (10); the pole (20) is conductively connected to the pole piece of the battery cell; the insulating film is arranged on a part of the periphery of the battery cell; the insulating plastic part (30) is arranged between the other end of the shell (10) and the battery cell, and covers the rest of the periphery of the battery cell; the insulating plastic part (30) and the insulating film are connected to form an insulating structure; the pole (20) is passed through the insulating plastic part (30).
2. The cylindrical battery according to claim 1, characterized in that: The insulating plastic part (30) comprises: A plastic bottom wall (31) is provided between the other end of the housing (10) and the battery core, and the plastic bottom wall (31) is used for insulation between the inner wall of the other end of the housing (10) and the battery core; The plastic side wall (32) is connected to the plastic bottom wall (31) and is arranged at an angle with the plastic bottom wall (31). The plastic side wall (32) is arranged between the inner peripheral wall of the shell (10) and the battery core to insulate the two.
3. The cylindrical battery according to claim 2, characterized in that: The angle between the plastic side wall (32) and the plastic bottom wall (31) is an obtuse angle, so that a bell mouth (301) is formed on the side of the plastic side wall (32) away from the plastic bottom wall (31).
4. The cylindrical battery according to claim 3, characterized in that: A plurality of notches (321) are formed along the circumferential direction on one side of the plastic side wall (32) close to the bell mouth (301).
5. The cylindrical battery according to claim 2, characterized in that: The length of the longitudinal section of the plastic side wall (32) is A, and A≤10 mm.
6. The cylindrical battery according to claim 2, characterized in that: The thickness of the plastic side wall (32) is gradually reduced from one side where the plastic side wall (32) is connected to the plastic bottom wall (31) toward the other side.
7. The cylindrical battery according to claim 6, characterized in that: The minimum thickness of the plastic side wall (32) is B, 0.15mm≤B≤0.2mm.
8. The cylindrical battery according to claim 1, characterized in that The insulating plastic part (30) is provided with a through hole (311), and the pole (20) is passed through the through hole (311).
9. The cylindrical battery according to claim 1, characterized in that: The insulating plastic part (30) is a heat-resistant insulating structure.
10. An electrical device, characterized in that: The invention comprises a cylindrical battery as claimed in any one of claims 1 to 9.