Battery cell assembly structure
By using pallets and limiting parts structures in the battery cell assembly structure, the problem of collision with the shell during the expansion of the battery cell is solved, and the effect of providing expansion space for the battery cell and preventing collision is achieved, which improves the fixing stability and safety of the battery cell.
Patent Information
- Application Number
- CN202422207151.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The battery cell collides with the shell during expansion, resulting in damage, and the prior art is difficult to effectively provide expansion space and prevent collision.
The pallet and limiting member structure is adopted. The limiting member forms a battery-cell mounting position with the pallet. The limiting member abuts the inner wall of the shell, and connects the insulating film through welding to form a gap to provide expansion space and prevent collision. The limiting member includes a plurality of protrusions to enhance the fixing effect.
It effectively provides expansion space for the battery cell, prevents collision with the shell, improves the fixed stability and safety of the battery cell, reduces the risk of damage, and welding connections improves the fixed efficiency and safety.
Smart Images
Figure CN223193952U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a battery cell assembly structure. Background Art
[0002] During the battery manufacturing process, the battery cell needs to be installed in the mounting shell. Before installation, an insulating film needs to be wrapped around the periphery of the battery cell to ensure insulation between the battery cell and the shell. A bottom support sheet is usually set at the bottom of the insulating film to ensure insulation between the bottom of the battery cell and the shell. At the same time, the bottom support sheet also provides good support for the battery cell, thereby improving the safety performance of the battery.
[0003] A gap is provided between the battery cell and the inner wall of the mounting shell to provide expansion space for the battery cell when it expands during use. However, this gap may cause the unexpanded battery cell to collide with the shell, resulting in damage to the battery cell. Utility Model Content
[0004] In view of this, the present application provides a battery cell assembly structure to solve or improve the problem of providing expansion space for the battery cell and preventing damage from collision with the casing.
[0005] The present application provides a battery cell assembly structure, comprising:
[0006] A support plate, on which a limit piece is provided, the limit piece and the support plate form a battery cell installation position;
[0007] An insulating film, used to wrap around the battery cell and with its bottom end connected to the limiting member;
[0008] The outer wall of the housing and the limiting member abut against the inner wall of the housing.
[0009] The limiting member and the support plate form a battery cell mounting position, the battery cell is installed on the battery cell mounting position, the limiting member is clamped and connected to the battery cell to fix the battery cell on the support plate, the limiting member abuts against the inner wall of the shell, and the limiting member has a certain thickness, so that a gap is formed between the battery cell and the inner wall of the shell, which can provide space for the battery cell to expand. The limiting member abuts against the inner wall of the shell, so that the support plate is fixed in the shell, thereby preventing the battery cell from colliding with the shell.
[0010] In an optional embodiment, the insulating film is connected to the limiting member by welding.
[0011] The welding connection is efficient and the heating speed is fast, and the insulating film can be fixed on the limiter.
[0012] In an optional embodiment, the limiting member includes a plurality of first limiting protrusions, the supporting plate is provided with a plurality of corners, and the plurality of first limiting protrusions are correspondingly connected to the plurality of corners of the supporting plate.
[0013] In an optional embodiment, the limiting member further includes a plurality of second limiting protrusions, and the plurality of second limiting protrusions are correspondingly connected to the edge of the support plate between two adjacent corners.
[0014] Multiple first limiting protrusions are set at the corners of the support plate, which have a better fixing effect on the battery core; multiple second limiting protrusions are set at the edge of the support plate between two adjacent corners, which have a better peripheral covering of the battery core and a better fixing effect.
[0015] In an optional embodiment, the outer side wall of the first limiting protrusion is sequentially provided with a first connecting surface, a first rounded surface and a second connecting surface, and the insulating film is adhered to and welded to the first connecting surface, the first rounded surface and the second connecting surface.
[0016] The insulating film is welded and fixed on the first connection surface, the first fillet surface and the second connection surface, with a large connection area and a good fixing effect.
[0017] In an optional embodiment, multiple corners of the outer shell corresponding to the support plate are provided with multiple second rounded surfaces, the radius of the second rounded surface is smaller than the radius of the first rounded surface, and the first connecting surface and the second connecting surface abut against the inner wall of the outer shell to press the inner wall of the outer shell against the first limiting protrusion.
[0018] In an optional embodiment, the inner side wall of the first limiting protrusion is provided with an arc surface for pressing the battery core.
[0019] In an optional embodiment, the height H of the first limiting protrusion is greater than 3 mm, and the height D of the second limiting protrusion is greater than 3 mm.
[0020] The height of the first limiting protrusion and the second limiting protrusion is greater than 3 mm, ensuring that the first limiting protrusion and the second limiting protrusion abut against the electrode sheet inside the battery cell. The electrode sheet has high hardness and fixes the battery cell more stably.
[0021] In an optional embodiment, the plurality of first limiting protrusions and the plurality of second limiting protrusions are all made of opaque plastic.
[0022] In an optional embodiment, the inner side wall of the first limiting protrusion is provided with a guiding slope for facilitating the installation of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0024] Figure 1An exploded view of a battery cell assembly structure according to an embodiment of the present application;
[0025] Figure 2 A top view of a support plate in a battery cell assembly structure according to an embodiment of the present application;
[0026] Figure 3 for Figure 2 A partial enlarged schematic diagram;
[0027] Figure 4 This is a side view of a support plate in a battery cell assembly structure according to an embodiment of the present application;
[0028] Figure 5 A side view of a support plate in another battery cell assembly structure according to an embodiment of the present application;
[0029] Figure 6 This is a side view of a support plate in another battery cell assembly structure according to an embodiment of the present application;
[0030] Figure 7 This is a cross-sectional view of a first limiting protrusion in a battery cell assembly structure according to an embodiment of the present application.
[0031] Description of reference numerals:
[0032] 1. Support plate; 2. Insulating film; 3. First limiting protrusion; 31. First connecting surface; 32. First fillet surface; 33. Second connecting surface; 34. Arc surface; 4. Second limiting protrusion; 5. Guide slope; 6. Battery cell. DETAILED DESCRIPTION
[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.
[0034] The following combination Figures 1 to 7 , describing the embodiments of the present application.
[0035] According to an embodiment of the present application, a battery cell assembly structure is provided, comprising:
[0036] A support plate 1 is provided with a limiter on its surface, and the limiter and the support plate 1 form a battery cell installation position;
[0037] The insulating film 2 is used to wrap around the battery cell 6 and has its bottom end connected to the stopper;
[0038] The outer wall of the housing and the limiting member abut against the inner wall of the housing.
[0039] The limiting member and the support plate 1 form a battery cell mounting position, and the battery cell 6 is installed on the battery cell mounting position. The limiting member is clamped and connected to the battery cell 6 to fix the battery cell 6 on the support plate 1. The limiting member abuts against the inner wall of the outer shell. The limiting member has a certain thickness, so that a gap is formed between the battery cell 6 and the inner wall of the outer shell, which can provide space for the battery cell 6 to expand. The limiting member abuts against the inner wall of the outer shell, so that the support plate 1 is fixed in the outer shell, thereby preventing the battery cell 6 from colliding with the outer shell.
[0040] In one embodiment, the insulating film 2 is connected to the stopper by welding. The welding connection has high efficiency and a fast heating speed, and can fix the insulating film 2 on the stopper.
[0041] In one embodiment, Figure 1 As shown, the limiting member includes a plurality of first limiting protrusions 3 , the support plate 1 is provided with a plurality of corners, and the plurality of first limiting protrusions 3 are correspondingly connected to the plurality of corners of the support plate 1 .
[0042] In one embodiment, the limiting member further includes a plurality of second limiting protrusions 4 , and the plurality of second limiting protrusions 4 are correspondingly connected to the edge of the support plate 1 between two adjacent corners.
[0043] Multiple first limiting protrusions 3 are set at the corners of the support plate 1, which have a better fixing effect on the battery cell 6; multiple second limiting protrusions 4 are set at the edge of the support plate 1 between two adjacent corners, which have a better peripheral covering of the battery cell 6 and a better fixing effect.
[0044] In a specific embodiment, Figures 1 to 2 As shown, the support plate 1 is a rectangular plate with four corners. Four first limiting protrusions 3 are provided. The four first limiting protrusions 3 are fixed at the four corners to fix the battery cell 6 more firmly.
[0045] In a specific embodiment, four second limiting protrusions 4 are provided, fixed on the support plate 1 and located between two adjacent first limiting protrusions 3 , so as to improve the fixing effect of the battery cell 6 .
[0046] In a specific embodiment, Figures 5 and 6 As shown, the support plate 1 is a rectangular plate, two second limiting protrusions 4 are provided on the two long sides of the support plate 1 , and one second limiting protrusion 4 is provided on the two short sides of the support plate 1 .
[0047] In one embodiment, Figures 2 to 3As shown, the outer wall of the first limiting protrusion 3 is sequentially provided with a first connecting surface 31, a first rounded surface 32, and a second connecting surface 33. The insulating film 2 is attached to and welded to the first connecting surface 31, the first rounded surface 32, and the second connecting surface 33. The insulating film 2 is welded to the first connecting surface 31, the first rounded surface 32, and the second connecting surface, resulting in a large connection area and a good fixing effect.
[0048] In a specific embodiment, laser welding is used for welding, which can quickly heat the first limiting protrusion 3 to melt it, and the insulating film 2 is bonded and fixed on the limiting protrusion.
[0049] In the related art, the insulating film is designed with a bottom surface, and the bottom surface of the insulating film is applied to the bottom surface of the battery cell 6, and then the bottom support plate is set between the bottom surface of the insulating film and the bottom surface of the battery cell 6, or the bottom support plate is set below the bottom surface of the insulating film (the bottom surface of the insulating film is located between the bottom support plate and the bottom surface of the battery cell 6); no matter which of the above methods is used, the bottom of the insulating film is finally connected to the bottom of the bottom support plate by heat melting. However, after the bottom surfaces of the two are hot-melted, it is easy for protrusions to penetrate the battery cell 6, causing the electrode in the battery cell 6 to lose powder or even puncture the isolation film, posing a greater safety risk. In this application, the insulating film 2 is connected to the outer wall of the first limiting protrusion 3 and the second limiting protrusion 4 set on the support plate 1, and the laser welding has high precision, and its thermal impact will not penetrate the first limiting protrusion 3 and the second limiting protrusion 4, thereby ensuring the safety of the battery cell 6. Through laser welding, the accuracy of the heating position and heating temperature of the first limiting protrusion 3 can be improved, and the insulating film 2 is welded to the first limiting protrusion 3 and the second limiting protrusion 4 to ensure the safety of the battery cell 6.
[0050] In one embodiment, multiple second rounded surfaces are provided at multiple corners corresponding to the support plate 1 of the outer shell, and the radius of the second rounded surface is smaller than the radius of the first rounded surface 32. The first connecting surface 31 and the second connecting surface 33 abut against the inner wall of the outer shell to press the inner wall of the outer shell against the first limiting protrusion 3.
[0051] In one embodiment, the inner side wall of the first limiting protrusion 3 is provided with an arc surface 34 for pressing the battery core 6 .
[0052] In one embodiment, Figures 4 and 5 As shown, the height H of the first limiting protrusion 3 is greater than 3 mm, and the height D of the second limiting protrusion 4 is greater than 3 mm. The heights of the first limiting protrusion 3 and the second limiting protrusion 4 are greater than 3 mm, ensuring that the first limiting protrusion 3 and the second limiting protrusion 4 are better abutted against the battery cell 6, and the fixation of the battery cell 6 is more stable.
[0053] In one embodiment, the plurality of first limiting protrusions 3 and the plurality of second limiting protrusions 4 are all made of opaque plastic.
[0054] It needs to be further explained that the first limiting protrusion 3 and the second limiting protrusion 4 are made of opaque or dark plastic material, which is easy to absorb laser, melt when heated and connect with the insulating film 2, thereby realizing the welding of the first limiting protrusion 3 and the second limiting protrusion 4 and the insulating film 2.
[0055] In a specific embodiment, the insulating film 2 is welded to the plurality of first limiting protrusions 3 and the plurality of second limiting protrusions 4 by laser welding.
[0056] The insulating film 2 is a cylindrical structure with openings at the top and bottom. It is simple to manufacture and can be easily mounted on the first limiting protrusion 3 and the second limiting protrusion 4 on the support plate 1. Compared with the irregular insulating film in the related art, it saves costs.
[0057] The bottom of the insulating film 2 is welded to the outer side walls of the plurality of first limiting protrusions 3 and the plurality of second limiting protrusions 4 .
[0058] More specifically, the insulating film 2 is a square cylindrical transparent film with a thickness of 0.1 mm. After the support plate 1 and the battery cell 6 are assembled, the insulating film 2 wraps them from all sides and is welded and fixed to multiple first limiting protrusions 3 and second limiting protrusions 4 by laser welding.
[0059] The insulating film 2 can be simply sleeved on the plurality of first limiting protrusions 3 or the plurality of second limiting protrusions 4, eliminating the need for the traditional bottom support sheet to be hot-melted and fixed on the insulating film in advance.
[0060] In one embodiment, the inner side wall of the first limiting protrusion 3 is provided with a guiding inclined surface 5 for facilitating the installation of the battery cell 6 .
[0061] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the accompanying application.
Claims
1. A battery cell assembly structure, characterized in that: include: A support plate (1) is provided with a limiting member on its plate surface, wherein the limiting member and the support plate (1) form a battery cell installation position; An insulating film (2) is used for wrapping around the battery core (6) and having its bottom end connected to the limiting member; The outer wall of the limiting member abuts against the inner wall of the outer shell.
2. The battery cell assembly structure according to claim 1, characterized in that: The insulating film (2) is connected to the limiting member by welding.
3. The battery cell assembly structure according to claim 2, characterized in that: The limiting member includes a plurality of first limiting protrusions (3), the support plate (1) is provided with a plurality of corners, and the plurality of first limiting protrusions (3) are correspondingly connected to the plurality of corners of the support plate (1).
4. The battery cell assembly structure according to claim 3, characterized in that: The limiting member further comprises a plurality of second limiting protrusions (4), and the plurality of second limiting protrusions (4) are correspondingly connected to the edge of the support plate (1) between two adjacent corners.
5. The battery cell assembly structure according to claim 3, characterized in that: The outer side wall of the first limiting protrusion (3) is provided with a first connecting surface (31), a first rounded surface (32) and a second connecting surface (33) in sequence, and the insulating film (2) is bonded and welded to the first connecting surface (31), the first rounded surface (32) and the second connecting surface (33).
6. The battery cell assembly structure according to claim 5, characterized in that: The shell is provided with a plurality of second rounded surfaces corresponding to the plurality of corners of the support plate (1), wherein the radius of the second rounded surface is smaller than the radius of the first rounded surface (32), and the first connecting surface (31) and the second connecting surface (33) abut against the inner wall of the shell so that the inner wall of the shell is pressed tightly against the first limiting protrusion (3).
7. The battery cell assembly structure according to claim 3, characterized in that: The inner side wall of the first limiting protrusion (3) is provided with an arc surface (34) for pressing the battery core (6).
8. The battery cell assembly structure according to claim 4, characterized in that: The height H of the first limiting protrusion (3) is greater than 3 mm, and the height D of the second limiting protrusion (4) is greater than 3 mm.
9. The battery cell assembly structure according to claim 4, characterized in that: The plurality of first limiting protrusions (3) and the plurality of second limiting protrusions (4) are all made of opaque plastic.
10. The battery cell assembly structure according to claim 3, characterized in that: The inner side wall of the first limiting protrusion (3) is provided with a guiding inclined surface (5) for facilitating the installation of the battery core (6).