Battery top cover structure, battery and electric equipment
By using the interference fit and friction layer between the limit frame and the shell in the battery cover structure, the rebound problem caused by the bending of the electrode is solved, ensuring the welding effect between the battery cover and the shell and avoiding metal Chips and short circuit risks improve battery stability and safety.
Patent Information
- Application Number
- CN202420052636.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-09
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-09
AI Technical Summary
The existing battery ceiling structure cannot be welded or poorly welded due to the rebound force caused by the bending of the ears of the pole, and the common solutions may have a risk of metal chips and battery cells short-circuit during the assembly process.
The battery ceiling structure is adopted, including a top cover plate, an insulating plate and a limit frame. The limit frame is protruding toward the shell and is arranged on the edge of the insulating plate. The size of the top cover structure is increased to fit the shell through interference, and the straight section and The friction layer and bending section of the guide section overcome the rebound force, ensure the welding effect, and reduce internal impurities through a non-metallic limit frame.
It effectively overcomes the rebound force caused by the bending of the extreme ear, ensures the welding effect between the top cover and the shell, avoids the risks of metal chips and short circuits, and improves the stability and safety of the battery ceiling structure.
Smart Images
Figure CN222190954U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of battery production, and in particular to a battery top cover structure, a battery and an electrical device. Background Art
[0002] The secondary battery includes a shell, a top cover and a battery cell. The top cover is buckled on the shell and has an installation space around the shell. The battery cell is installed in the installation space. In order to increase the energy density of the battery cell, the tabs of the battery cell need to be bent when they are installed in the installation space. The bent tabs have a certain resilience, which will lift the top cover. Specifically, combined with Figure 1 As shown, the top cover 1' includes a top cover plate 2' and an insulating plate 3' which fit each other, and the insulating plate 3' is close to the installation space; wherein, the outline size of the insulating plate 3' is smaller than the outline size of the top cover plate 2'. After the top cover 1' is put into the shell, the top cover 1' is pushed out due to the large resilience of the tab after bending, resulting in the inability to weld or poor welding.
[0003] At present, the following solutions are often used to solve the above technical problems: Figure 2 and Figure 3 As shown, the R2 corner of the top cover 1' is made smaller to interfere with the R1 corner of the shell 4' (R2 < R1) to offset the rebound force. However, this method will cause metal chips to appear at the R corner during the assembly process, and there is a risk of short circuit inside the battery cell.
[0004] Therefore, there is an urgent need for a battery top cover structure, a battery and an electrical device to solve the technical problems existing in the prior art to a certain extent. Utility Model Content
[0005] The purpose of the present application is to provide a battery top cover structure, a battery and an electrical device, so that the battery top cover structure can overcome the rebound force caused by the bending of the pole ear to a certain extent, and ensure the welding effect of the top cover structure and the shell.
[0006] The present application provides a battery top cover structure, including a top cover plate, an insulating plate and a limiting frame;
[0007] The insulating plate is arranged on a side of the top cover plate facing the shell;
[0008] The limiting frame is protruding toward the shell and is arranged on the edge of the insulating plate. At least part of the positive projection of the limiting frame falls outside the range of the top cover plate, so that the battery top cover structure and the shell are interference fit.
[0009] In the above technical solution, further, the limiting frame includes a straight section connected to the insulating plate and a guide section connected to the straight section;
[0010] The straight section and the guide section protrude from the edge of the insulating plate toward the shell, and the guide section can guide the straight section into the shell so that the straight section fits with the shell.
[0011] In the above technical solution, further, a friction layer is provided on a side of the straight section facing the shell.
[0012] In the above technical solution, further, the guide section is an arc-shaped structure;
[0013] When the insulating plate extends into the shell, the guide section deforms in a direction away from the shell, so that the straight section fits with the shell; and when the straight section fits with the shell, the end of the guide section away from the straight section is higher than the upper surface of the battery cell.
[0014] In the above technical solution, further, the limiting frame also includes a curved section; the curved section is arranged between the insulating plate and the straight section.
[0015] In the above technical solution, further, the bending section and / or the guiding section is bent toward the inside of the shell.
[0016] In the above technical solution, further, the limiting frame is provided with a plurality of them;
[0017] A plurality of the limiting frames are arranged at intervals along the edge of the insulating plate.
[0018] In the above technical solution, further, the limit frame is made of non-metallic material.
[0019] The present application also provides a battery, comprising the above-mentioned battery top cover structure.
[0020] The present application also provides an electrical device, comprising the above-mentioned battery.
[0021] Compared with the prior art, the beneficial effects of this application are:
[0022] The application provides a battery top cover structure, including a top cover plate, an insulating plate and a limiting frame.
[0023] Specifically, the shell is surrounded by an installation space for placing the battery cell assembly, the insulating plate and the top cover plate are both arranged at the open end of the shell, and the insulating plate is arranged on the side of the top cover plate facing the shell (that is, the insulating plate is arranged on the side of the top cover plate facing the installation space).
[0024] Specifically, the limit frame is protruding toward the shell and is arranged at the edge of the insulating plate to increase the size of the top cover structure, so that the top cover structure and the shell have an interference fit. Furthermore, one end of the limit frame is arranged at the edge of the insulating plate, and the other end extends toward the shell, so that the limit frame is protruding from the insulating plate, increasing the size of the insulating plate, and then increasing the size of the top cover structure, so that the top cover structure and the shell have an interference fit. This interference fit method allows the top cover structure to be clamped to the shell, and then the top cover structure can overcome the rebound force generated by the bending of the pole ear, and ensure the welding effect of the top cover structure and the shell.
[0025] The present application also provides a battery, including the battery top cover structure described above, and thus has all the beneficial effects of the battery top cover structure described above, which will not be elaborated in detail here.
[0026] The present application also provides an electrical device, including the above-mentioned battery, and thus has all the beneficial effects of the above-mentioned battery, which will not be elaborated in detail here. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. 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 paying any creative work.
[0028] Figure 1 It is a schematic diagram of a top cover structure in the prior art;
[0029] Figure 2 It is a schematic diagram of the structure of the top cover structure and the shell in the prior art;
[0030] Figure 3 for Figure 2 A in the enlarged view;
[0031] Figure 4 A schematic structural diagram of a battery top cover structure provided in Embodiment 1 of the present application at a first viewing angle;
[0032] Figure 5 for Figure 4 AA section view;
[0033] Figure 6 for Figure 5 A magnified view of point B;
[0034] Figure 7 A schematic diagram of the structure of the battery top cover structure provided in Example 1 of the present application at a second viewing angle;
[0035] Figure 8 for Figure 7 CC cross-sectional view.
[0036] Reference numerals:
[0037] 1'-top cover; 2'-top cover plate; 3'-insulating plate; 4'-shell; 5-top cover plate; 6-insulating plate; 7-limiting frame; 8-straight section; 9-guide section; 10-bent section; 11-battery cell; 12-shell; 13-bent pole ear. DETAILED DESCRIPTION
[0038] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.
[0039] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.
[0040] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.
[0041] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.
[0042] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.
[0043] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.
[0044] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.
[0045] Embodiment 1
[0046] Combine the following Figure 4-Figure 8 , a battery top cover structure provided in this application is described in detail.
[0047] In this embodiment, the battery top cover structure includes a top cover plate 5 , an insulating plate 6 and a limiting frame 7 .
[0048] Specifically, the housing 12 is provided with an installation space for placing the battery cell 11, and at least one end of the housing 12 is provided with an open end, the top cover plate 5 is provided at the open end of the housing 12, and the insulating plate 6 is provided on the side of the top cover plate 5 facing the housing 12 (that is, the insulating plate 6 is provided on the side of the top cover plate 5 facing the installation space). It should be noted that the housing 12 can be provided with an open end at one end, and a battery top cover structure is used to seal the open end. The housing 12 can also be provided with open ends at both ends that are relatively arranged, and the two battery top cover structures are used to seal the corresponding open ends respectively.
[0049] Specifically, the limit frame 7 is arranged at the edge of the insulating plate 6 and extends to the outside of the top cover plate 5 in a direction away from the insulating plate 6, that is, along the thickness direction of the top cover plate 5 ( Figure 8In the vertical direction shown in the figure), at least part of the orthographic projection of the limit frame 7 falls outside the range of the top cover plate 5, so that the battery top cover structure and the shell 12 have an interference fit. Furthermore, one end of the limit frame 7 is arranged at the edge of the insulating plate 6, and the other end extends toward the outside of the top cover plate 5, so that the limit frame 7 extends out of the top cover plate 5, increasing the size of the insulating plate 6, and then increasing the size of the battery top cover structure, so that the battery top cover structure and the shell 12 have an interference fit. This interference fit method enables the battery top cover structure to be snapped into the shell 12, and then the battery top cover structure can overcome the rebound force caused by the bending of the pole ear, avoid the battery top cover structure and the shell 12 from not fitting tightly, and ensure the assembly effect of the battery top cover structure and the shell 12. Among them, the battery top cover structure and the shell 12 can be connected by welding, riveting, hot melting, snapping, etc.
[0050] Furthermore, combined with Figure 4 As shown, the top cover plate 5 is a rectangular structure, and correspondingly, the insulating plate 6 is also a rectangular structure, including two long sides and two short sides arranged opposite to each other, and the size of the long side is larger than the size of the short side. The limit frame 7 can be arranged on the edge of the long side of the insulating plate 6. In this way, the limit frame 7 increases the size of the insulating plate 6 in the width direction, thereby increasing the width of the battery top cover structure; the limit frame 7 can also be arranged on the edge of the short side of the insulating plate 6, and the limit frame 7 increases the size of the insulating plate 6 in the length direction, thereby increasing the length of the battery top cover structure; the limit frame 7 can also be arranged on both the edge of the short side of the insulating plate 6 and the edge of the long side of the insulating plate 6, and the limit frame 7 increases the size of the insulating plate 6 in the length direction and the size of the width direction, thereby increasing the length and width of the battery top cover structure.
[0051] In this embodiment, combined with Figure 6 As shown, the limit frame 7 includes a straight section 8 connected to the insulating plate 6 and a guide section 9 connected to the straight section 8. That is, one end of the straight section 8 is arranged at the edge of the insulating plate 6, and the other end of the straight section 8 is connected to the guide section 9, and the other end of the guide section 9 extends toward the outside of the top cover plate 5, and the positive projection of the guide section 9 falls outside the range of the top cover plate 5, so that the limit frame extends out of the top cover plate 5, so that the battery top cover structure and the shell 12 are interference-fitted. This interference-fitting method enables the battery top cover structure to be clamped on the shell 12, and then the battery top cover structure can overcome the rebound force generated by the bending of the pole ear, avoid the battery top cover structure and the shell 12 from being loosely matched, and ensure the assembly effect of the battery top cover structure and the shell 12.
[0052] Furthermore, combined with Figure 6 As shown, the thickness L4 of the straight section 8 is greater than 0.3 mm; the length L3 of the straight section 8 is greater than 0.3 mm. If the thickness of the straight section 8 is too small, the withstand voltage is small and it is easy to break; if the length of the straight section 8 is too small, the contact area with the shell is small and it is easy to separate.
[0053] Specifically, combined Figure 5 As shown, taking the limit frame 7 arranged on the long side edge of the insulating plate 6 as an example, a detailed description is given, the limit frame 7 is symmetrically arranged on the long side edges of both sides of the insulating plate 6, and in a free state, the maximum distance (width) between the symmetrically arranged limit frames 7 is L2 (L2 is also the maximum width of the battery top cover structure in a free state), and L2 is greater than the width of the shell 12, then in the actual installation process, combined with Figure 7 and Figure 8 As shown, the guide section 9 plays a guiding role and can guide the straight section 8 into the shell 12. During the process of guiding the straight section 8 into the shell 12, the guide section 9 is squeezed by the shell 12 and deforms toward the inside of the shell 12, so that the straight section 8 is subjected to greater pressure, so that the straight section 8 fits with the shell 12. When the rebound force generated by the bent pole ear 13 acts on the battery top cover structure, static friction occurs between the straight section 8 and the shell 12 to overcome the rebound force, thereby ensuring the assembly effect of the battery top cover structure and the shell 12. Among them, the static friction force is proportional to the pressure, that is, the greater the pressure on the straight section 8 from the shell 12, the greater the static friction force it generates, the tighter the assembly with the shell 12, and the less likely it is to rebound.
[0054] In this embodiment, a friction layer is provided on the side of the straight section 8 facing the housing 12 .
[0055] Specifically, due to the relative compression between the contact surfaces of the housing 12 and the straight section 8 of the limiting frame 7, and the friction layer on the contact surface, the static friction between the housing 12 and the limiting frame 7 is increased, and the static friction prevents the limiting frame 7 and the housing 12 from moving relative to each other, thereby maintaining a stable connection between the housing 12 and the battery top cover structure. It should be noted that in this embodiment, the static friction between the straight section 8 and the housing 12 is increased by increasing the friction coefficient between the two.
[0056] In this embodiment, the guide section 9 is in an arc-shaped structure.
[0057] Specifically, when the insulating plate 6 extends into the shell 12, the guide section 9 is deformed in a direction away from the shell 12, so that the straight section 8 fits with the shell 12; and when the straight section 8 fits with the shell 12, the end of the guide section 9 away from the straight section 8 is higher than the upper surface of the battery cell 11.
[0058] Furthermore, the arc-shaped guide section 9 facilitates the insertion of the insulating plate 6 into the shell.
[0059] In this embodiment, a plurality of limiting frames 7 are provided.
[0060] Specifically, a plurality of limiting frames 7 are arranged at intervals along the edge of the insulating plate 6 .
[0061] In a first preferred embodiment, a plurality of limiting frames 7 are symmetrically arranged along the long side edges of the insulating plate 6 .
[0062] In a second preferred embodiment, a plurality of limiting frames 7 are symmetrically arranged along the short side edges of the insulating plate 6 .
[0063] In a third preferred embodiment, some of the limiting frames 7 are symmetrically arranged along the long side edges of the insulating plate 6 , and another part of the limiting frames 7 are symmetrically arranged along the short side edges of the insulating plate 6 .
[0064] In this embodiment, in order to reduce the short circuit caused by impure metal inside the battery, the limiting frame 7 is made of non-metallic material.
[0065] Preferably, the limiting frame 7 is made of rubber material, and the limiting frame 7 made of rubber material increases the static friction between the housing 12 and the limiting frame 7 to a certain extent.
[0066] In this embodiment, combined with Figure 6 As shown, the limiting frame 7 further includes a curved section 10 , and the curved section 10 is arranged between the insulating plate 6 and the straight section 8 .
[0067] Specifically, the bending section 10 and / or the guide section 9 are bent toward the inside of the housing 12 .
[0068] Embodiment 2
[0069] The present application also provides a battery, including the battery top cover structure described above, and thus has all the beneficial effects of the battery top cover structure described above, which will not be elaborated in detail here.
[0070] Embodiment 3
[0071] The present application also provides an electrical device, including the above-mentioned battery, so that it has all the beneficial effects of the above-mentioned battery, which will not be elaborated in detail here.
[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A battery top cover structure, characterized in that: It comprises a top cover plate (5), an insulating plate (6) and a limiting frame (7); The insulating plate (6) is arranged on a side of the top cover plate (5) facing the shell (12); The limiting frame (7) is arranged on the edge of the insulating plate (6) and protrudes toward the shell (12); at least part of the positive projection of the limiting frame (7) falls outside the range of the top cover plate (5), so that the battery top cover structure and the shell (12) are interference fit.
2. The battery top cover structure according to claim 1, characterized in that: The limiting frame (7) comprises a straight section (8) connected to the insulating plate (6) and a guide section (9) connected to the straight section (8); The straight section (8) and the guide section (9) protrude from the edge of the insulating plate (6) toward the shell (12), and the guide section (9) can guide the straight section (8) into the shell (12) so that the straight section (8) and the shell (12) fit together.
3. The battery top cover structure according to claim 2, characterized in that: A friction layer is provided on the side of the straight section (8) facing the housing (12).
4. The battery top cover structure according to claim 2, characterized in that: The guide section (9) is in an arc-shaped structure; When the insulating plate (6) extends into the shell (12), the guide section (9) deforms in a direction away from the shell (12), so that the straight section (8) fits with the shell (12); and when the straight section (8) fits with the shell (12), the end of the guide section (9) away from the straight section (8) is higher than the upper surface of the battery cell (11).
5. The battery top cover structure according to claim 2, characterized in that: The limiting frame (7) further comprises a bending section (10); The curved section (10) is arranged between the insulating plate (6) and the straight section (8).
6. The battery top cover structure according to claim 5, characterized in that: The bending section (10) and / or the guide section (9) are bent toward the inside of the housing (12).
7. The battery top cover structure according to any one of claims 1 to 6, characterized in that: The limiting frame (7) is provided in plurality; A plurality of the limiting frames (7) are arranged at intervals along the edge of the insulating plate (6).
8. The battery top cover structure according to any one of claims 1 to 6, characterized in that: The limiting frame (7) is made of non-metallic material.
9. A battery, characterized in that: A battery top cover structure comprising any one of claims 1-8.
10. An electrical device, characterized in that: A battery comprising the battery of claim 9.