Cover plate structure and battery
By arranging a hoop in the pole placement hole to limit the deformation of the riveted column, the problem of cover plate structure assembly caused by deformation of the middle part of the pole is solved, and the yield rate of the battery cover is improved.
Patent Information
- Application Number
- CN202422597732.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-25
AI Technical Summary
During the riveting process of the pole, the middle part of the pole will also be deformed, causing the parts that match the pole to deform excessively, affecting the assembly yield of the battery cover.
A hoop is arranged in the pole placement hole and is arranged on the outside of the riveted column to limit the deformation of the riveted column and prevent it from directly squeezing the cover.
This effectively avoids the deformation of the riveted column and the direct extrusion of the cover, thereby improving the assembly yield rate of the cover structure.
Smart Images
Figure CN223309087U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a cover plate structure and a battery. Background Art
[0002] As lithium-ion battery technology becomes increasingly mature, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage fields, and the requirements for the performance and safety of lithium-ion batteries are increasing.
[0003] The lithium battery cover is a key component in lithium-ion batteries. Its functions are to weld with the shell to form a sealed cavity, to lead out the positive and negative electrodes of the electrode group, and to serve as an assembly carrier. Today's positive and negative electrodes of the electrode group are usually led out through the poles on the cover, and today's poles are usually fixed to the cover by riveting. However, during the riveting process of the pole, in addition to the deformation of the head of the pole under pressure, the middle part of the pole will also be deformed under the action of pressure (for example, it will be thickened or bent). Once the deformation of the middle part of the pole is excessive, it is very easy to cause the pole to squeeze the cover and other parts that cooperate with the pole to deform excessively, and even cause the pole to squeeze and damage the above-mentioned parts that cooperate with the pole, thereby affecting the assembly yield of the battery cover. Utility Model Content
[0004] The purpose of this application is to provide a cover plate structure and a battery, so as to solve, to a certain extent, the technical problem in the prior art that during the riveting process of the pole, in addition to the deformation of the head of the pole under pressure, the middle part of the pole will also be deformed under the action of pressure (for example, being pressed thicker or bent). Once the deformation of the middle part of the pole is excessive, it is very easy to cause the pole to squeeze the cover and other components that cooperate with the pole to deform excessively, and even cause the pole to squeeze and damage the above-mentioned components that cooperate with the pole, thereby affecting the assembly yield of the battery cover.
[0005] According to a first aspect of the present application, a cover plate structure is provided, comprising a cover portion, a pole assembly, and a hoop, wherein the cover portion comprises a pole placement hole penetrating the cover portion along a first direction;
[0006] The pole assembly includes a rivet block and a rivet post, wherein the rivet block is disposed on one side of the cover portion in the first direction, and at least a portion of the rivet post extends through the pole placement hole from the other side of the cover portion in the first direction, and the rivet post is connected to the rivet block;
[0007] The hoop is arranged in the pole placement hole and is arranged on at least a portion of the outer side of the riveted column.
[0008] Preferably, the riveted post comprises a post body and a pole bottom plate, the post body extends along the first direction, and the riveted post passes through the pole placement hole via the post body;
[0009] The pole bottom plate is fixedly connected to an end of the pole body away from the riveting block.
[0010] Preferably, in the first direction, the size of the hoop is smaller than or equal to the distance between the rivet block and the pole bottom plate.
[0011] Preferably, it further comprises a sealing ring, which is arranged in the pole placement hole and sleeved on the outside of the hoop to insulate the pole body from the cover;
[0012] In the first direction, the size of the cuff is greater than or equal to the size of the sealing ring.
[0013] Preferably, an outer edge of the hoop at one end close to the riveting block in the first direction is provided with a chamfer.
[0014] Preferably, the hardness of the hoop is greater than the hardness of the riveted post;
[0015] And / or, the anti-deformation strength of the hoop is greater than the anti-deformation strength of the riveted column.
[0016] Preferably, the hoop is cylindrical;
[0017] And / or, the thickness of the tube wall of the hoop is 0.5 mm to 1.5 mm.
[0018] Preferably, the hoop and the column body are transitionally matched.
[0019] Preferably, it further comprises a first plastic part and a second plastic part, wherein the first plastic part is arranged between the riveting block and the cover;
[0020] The second plastic part is arranged between the pole bottom plate and the cover;
[0021] Two ends of the sealing ring in the first direction are connected to the first plastic part and the second plastic part respectively;
[0022] The first plastic part is provided with a column hole for the column body to pass through, and the hoop can extend into the column hole.
[0023] According to the second aspect of the present application, a battery is provided, comprising the cover plate structure described in any of the above technical solutions, and thus having all the beneficial technical effects of the cover plate structure, which will not be described in detail here.
[0024] Compared with the prior art, the present invention has the following advantages:
[0025] The cover plate structure provided by the present application is characterized in that the hoop is arranged in the pole placement hole, and the hoop is arranged on the outside of at least a portion of the rivet column. In this way, during the process of riveting the rivet column and the rivet block, the hoop can effectively limit the deformation of the portion of the rivet column arranged in the pole placement hole, and limit the deformation of the rivet column within the hoop, effectively avoiding the deformation of the rivet column directly squeezing the cover part, reducing the risk of the cover part being squeezed and damaged, and thereby improving the assembly yield of the cover plate structure.
[0026] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. 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 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.
[0028] Figure 1 A schematic front view of the cover structure provided in an embodiment of the present application;
[0029] Figure 2 for Figure 1 A schematic diagram of a cross-sectional structure obtained by cutting the cover plate structure along the AA direction is provided;
[0030] Figure 3 for Figure 2 The enlarged structural diagram of the cover plate structure provided at position B;
[0031] Figure 4 A schematic diagram of a cross-sectional structure obtained by cutting the hoop provided in an embodiment of the present application along the planes determined in both the first direction and the second direction;
[0032] Figure 5 Schematic diagram of the exploded structure of the cover structure provided in an embodiment of the present application.
[0033] Reference numerals:
[0034] 1-pole assembly; 11-riveted column; 111-column body; 112-pole base plate; 12-riveted block; 2-cover; 21-pole placement hole; 3-clamp; 31-chamfer; 4-sealing ring; 41-limiting edge; 5-first plastic part; 51-column hole; 6-second plastic part; 61-through hole.
[0035] F1-first direction; F2-second direction; F3-third direction. DETAILED DESCRIPTION
[0036] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.
[0037] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.
[0038] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.
[0039] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0040] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0041] Refer to the following Figures 1 to 5 The cover structure and battery according to some embodiments of the present application are described.
[0042] See also Figures 1 to 5As shown, an embodiment of the first aspect of the present application provides a cover plate structure, which includes a cover portion 2, a pole assembly 1, and a hoop 3. The cover portion 2 includes a pole placement hole 21 that passes through the cover portion 2 along a first direction F1. The pole assembly 1 includes a rivet block 12 and a rivet post 11. The rivet block 12 is arranged on one side of the cover portion 2 in the first direction F1, and at least a portion of the rivet post 11 passes through the pole placement hole 21 from the other side of the cover portion 2 in the first direction F1, and the rivet post 11 is connected to the rivet block 12. The hoop 3 is arranged in the pole placement hole 21, and the hoop is arranged on the outside of at least a portion of the rivet post 11.
[0043] According to the cover plate structure provided by the above technical features, the hoop 3 is arranged in the pole placement hole 21, and the hoop is arranged on the outside of at least part of the rivet column 11. In this way, during the process of riveting the rivet column 11 and the rivet block 12, the hoop 3 can effectively limit the deformation of the part of the rivet column 11 arranged in the pole placement hole 21, and limit the deformation of the rivet column 11 to the hoop 3, effectively avoiding the deformation of the rivet column 11 directly squeezing the cover part 2, reducing the risk of the cover part 2 being squeezed and damaged, and thereby improving the assembly yield of the cover plate structure.
[0044] like Figures 1 to 5 As shown, F1 shown in the figure can be an example of the first direction F1 described above. Taking the above-mentioned cover 2 as a flat plate as an example, the first direction F1 can be a direction perpendicular to the cover 2. For ease of description, two mutually perpendicular directions on a plane parallel to the cover 2 are defined as a second direction F2 and a third direction F3. F2 shown in the figure can be an example of the second direction F2. F3 shown in the figure can be an example of the third direction F3.
[0045] Alternatively, as Figure 2 and Figure 5 The example illustrates the above-described cover plate structure being applied to a prismatic battery. Accordingly, the cover portion 2 is shaped like a square sheet. Optionally, the cover portion 2 can cover one end of the prismatic battery in its longitudinal direction. In other words, the first direction F1 can be parallel to the longitudinal direction of the prismatic battery. Accordingly, the second direction F2 can be the width direction of the prismatic battery, and the third direction F3 can be the thickness direction of the prismatic battery.
[0046] However, it is not limited thereto. The cover structure can also be applied to cylindrical batteries or other special-shaped batteries. Correspondingly, the shape of the cover portion 2, the first direction F1, the second direction F2 and the third direction F3 can be adaptively adjusted according to the battery structure to which the cover structure is applied.
[0047] Preferably, if Figure 2 and Figure 3As shown, the riveted post 11 may include a post body 111 and a pole base plate 112. The post body 111 extends along a first direction F1, and the riveted post 11 extends through the pole placement hole 21 via the post body 111. The pole base plate 112 is fixedly connected to an end of the post body 111 away from the riveted block 12. In this way, after the riveted block 12 and the riveted post 11 are riveted together, a pole assembly 1 structure with an "I"-shaped cross-section can be formed. This "I"-shaped pole assembly 1 structure can not only effectively limit the pole assembly 1 relative to the cover 2, but also effectively ensure the flow area of the pole assembly 1 connecting to the battery interior and the battery exterior, thereby ensuring the flow capacity of the pole assembly 1.
[0048] Correspondingly, if Figure 2 and Figure 3 As shown, the hoop 3 is clamped on the outer side of the column body 111 .
[0049] Optionally, the column body 111 and the hoop 3 may be transitionally fitted. In other words, during the riveting connection between the rivet block 12 and the riveted column 11 , the column body 111 may be interference fit within the hoop 3 after being deformed by riveting.
[0050] Preferably, if Figure 2 and Figure 3 As shown, in the first direction F1, the size of the cuff 3 (ie Figure 4 The h value shown is less than or equal to the distance between the rivet block 12 and the pole bottom plate 112, so as to prevent the hoop 3 from interfering with the press riveting assembly of the rivet block 12 and the pole 11.
[0051] Preferably, the hardness of the hoop 3 may be greater than the hardness of the riveted post 11 to prevent the hoop 3 from being squeezed and damaged by the riveted post 11 .
[0052] Preferably, the anti-deformation strength of the hoop 3 may be greater than the anti-deformation strength of the riveted post 11 , so as to prevent the hoop 3 from being deformed under the squeezing action of the riveted post 11 .
[0053] It should be noted that, as long as the hoop 3 can satisfy mechanical properties (hardness, deformation resistance, etc.) that are better than those of the riveted column 11, the hoop 3 can be made of carbon steel (for example, Q235, Q345, etc.), alloy material, inorganic non-metallic material (for example, ceramic material), polymer material or composite material.
[0054] Preferably, the hoop 3 may be cylindrical so as to be sleeved on the outside of the column body 111. Figure 5An example in which the hoop 3 is cylindrical is shown, but the invention is not limited thereto. The shape of the hoop 3 can be adaptively adjusted according to the shape of the column body 111. For example, if the column body 111 is a square column, the shape of the hoop 3 can be a square cylinder accordingly.
[0055] Preferably, the wall thickness of the hoop 3 (i.e. Figure 4 The t value shown can be 0.5 mm to 1.5 mm, so as to take into account both the mechanical properties and space utilization of the hoop 3.
[0056] In an embodiment, preferably, Figures 2 to 5 As shown, the cover plate structure may further include an insulating component for insulation between the pole assembly 1 and the cover 2 .
[0057] Preferably, if Figure 2 、 Figure 3 and Figure 5 As shown, the above-mentioned insulating component may include a sealing ring 4, which is arranged in the pole placement hole 21 and is sleeved on the outside of the hoop 3. On the one hand, the column body 111 and the hole wall of the pole placement hole 21 are separated by the sealing ring 4 to achieve insulation between the column body 111 and the cover 2; on the other hand, sleeved on the outside of the hoop 3, it can effectively prevent the column body 111 from squeezing the sealing ring 4 during the riveting process, thereby reducing the probability of the sealing ring 4 being damaged during the riveting process of the rivet block 12 and the riveted column 11.
[0058] Preferably, if Figure 2 and Figure 3 As shown, in the first direction F1, the size of the cuff 3 (ie Figure 4 The h value shown is greater than or equal to the size of the sealing ring 4 to ensure that the protection of the sealing ring 4 by the hoop 3 is comprehensive.
[0059] Preferably, if Figure 4 As shown, the outer edge of the hoop 3 at one end close to the rivet block 12 in the first direction F1 is provided with a chamfer 31 , so as to facilitate the assembly of the sealing ring 4 on the outer side of the hoop 3 .
[0060] Preferably, if Figure 2 、 Figure 3 and Figure 5 As shown, the above-mentioned insulating component can also include a first plastic part 5, which can be arranged between the riveting block 12 and the cover 2 to achieve insulation between the riveting block 12 and the cover 2 through the barrier of the first plastic part 5.
[0061] Preferably, if Figure 2 、 Figure 3 and Figure 5As shown, the first plastic part 5 is provided with a through-column hole 51 for the column body 111 to pass through, and the hoop 3 can extend into the through-column hole 51, so that the hoop 3 can effectively protect the through-column hole 51, thereby effectively preventing the column body 111 from deforming excessively in the through-column hole 51, resulting in the phenomenon of squeezing out the first plastic part 5.
[0062] Preferably, if Figure 2 、 Figure 3 and Figure 5 As shown, the above-mentioned insulating assembly may further include a second plastic part 6 , which is disposed between the pole bottom plate 112 and the cover 2 , so as to achieve insulation between the pole bottom plate 112 and the cover 2 through the barrier of the second plastic part 6 .
[0063] Preferably, if Figure 2 and Figure 3 As shown, both ends of the sealing ring 4 in the first direction F1 are connected to the first plastic part 5 and the second plastic part 6 respectively, so as to ensure that the insulating assembly provides comprehensive insulation protection to both the cover 2 and the pole assembly 1 .
[0064] Preferably, if Figure 2 、 Figure 3 and Figure 5 As shown, the second plastic part 6 may further be provided with a through hole 61 penetrating the second plastic part 6 along the first direction F1 , and the column body 111 may penetrate the second plastic part 6 via the through hole 61 .
[0065] Preferably, if Figure 2 and Figure 3 As shown, the hoop 3 can extend into the through hole 61 , so that the hoop 3 can effectively protect the through hole 61 , thereby effectively preventing the column body 111 from deforming excessively in the through hole 61 and causing damage to the second plastic part 6 .
[0066] Preferably, if Figure 3 As shown, a limiting edge 41 is provided on the outer side of the sealing ring 4 at one end close to the pole bottom plate 112 in the first direction F1. The limiting edge 41 can be clamped on the side of the pole placement hole 21 facing away from the rivet block 12. The sealing ring 4 is connected to the second plastic part 6 via the limiting edge 41.
[0067] An embodiment of the second aspect of the present application further provides a battery, comprising the cover plate structure described in any of the above embodiments, and thus having all the beneficial technical effects of the cover plate structure, which will not be described in detail here.
[0068] Optionally, not shown in the figures, the battery may include a housing, and the cover structure may cover one end of the housing in the first direction F1.
[0069] Optionally, not shown in the figures, the battery may include a housing, and the cover structure may cover both ends of the housing in the first direction F1.
[0070] 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 them. 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A cover plate structure, characterized in that: The invention comprises a cover, a pole assembly and a hoop, wherein the cover comprises a pole placement hole penetrating the cover along a first direction; The pole assembly includes a rivet block and a rivet post, wherein the rivet block is disposed on one side of the cover portion in the first direction, and at least a portion of the rivet post extends through the pole placement hole from the other side of the cover portion in the first direction, and the rivet post is connected to the rivet block; The hoop is arranged in the pole placement hole and is arranged on at least a portion of the outer side of the riveted column.
2. The cover plate structure according to claim 1, characterized in that: The riveted post comprises a post body and a pole bottom plate, the post body extends along the first direction, and the riveted post passes through the pole placement hole via the post body; The pole bottom plate is fixedly connected to an end of the pole body away from the riveting block.
3. The cover plate structure according to claim 2, characterized in that: In the first direction, the size of the hoop is smaller than or equal to the distance between the rivet block and the pole bottom plate.
4. The cover plate structure according to claim 2, characterized in that: It also includes a sealing ring, which is arranged in the pole placement hole and is sleeved on the outside of the hoop to insulate the pole body from the cover; In the first direction, the size of the cuff is greater than or equal to the size of the sealing ring.
5. The cover plate structure according to claim 4, characterized in that: An outer edge of the hoop at one end close to the rivet block in the first direction is provided with a chamfer.
6. The cover plate structure according to any one of claims 1 to 5, characterized in that: The hardness of the hoop is greater than the hardness of the riveted post; And / or, the anti-deformation strength of the hoop is greater than the anti-deformation strength of the riveted column.
7. The cover plate structure according to any one of claims 1 to 5, characterized in that: The hoop is cylindrical; And / or, the thickness of the tube wall of the hoop is 0.5 mm to 1.5 mm.
8. The cover plate structure according to claim 2, characterized in that: The hoop and the column body are transitionally matched.
9. The cover plate structure according to claim 4, characterized in that: It also includes a first plastic part and a second plastic part, wherein the first plastic part is arranged between the riveting block and the cover; The second plastic part is arranged between the pole bottom plate and the cover; Two ends of the sealing ring in the first direction are connected to the first plastic part and the second plastic part respectively; The first plastic part is provided with a column hole for the column body to pass through, and the hoop can extend into the column hole.
10. A battery, characterized in that: The cover plate structure comprises the cover plate structure according to any one of claims 1 to 9.