Top cover assembly, battery shell and power battery
By incorporating deformable structures, such as grooves and protrusions, into the top cover assembly, the problem of air leakage during top cover assembly testing was solved, achieving compliance with air pressure testing requirements while reducing costs.
Patent Information
- Application Number
- CN202520324278.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-26
AI Technical Summary
During the testing process, the top cover assembly experienced air leakage near the electrode due to its reduced thickness, failing to meet the cell pressure test requirements.
Deformable structures, such as grooves and protrusions, are incorporated into the top cover assembly to enhance its deformability and prevent air leakage.
This effectively prevents air leakage at the connection between the top cover and the pole, meeting testing requirements while saving costs.
Smart Images
Figure CN223927476U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to new energy power battery technical field especially, relates to a top cap subassembly, battery shell and power battery. BACKGROUND
[0002] When the top cap subassembly is being tested, the air pressure in the top cap is greater than the outside air pressure, the position of the top cap near the pole will be thinning due to the thickness of the top cap, and the position of the top cap near the pole will leak, so that the air pressure test requirement of the battery cell cannot be reached. UTILITY MODEL CONTENTS
[0003] Therefore, it is necessary to provide a top cap subassembly, battery shell and power battery, which aims to solve the technical problem that when the top cap subassembly is being tested, the air pressure in the top cap is greater than the outside air pressure, the position of the top cap near the pole will be thinning due to the thickness of the top cap, and the position of the top cap near the pole will leak, so that the air pressure test requirement of the battery cell cannot be reached.
[0004] In a first aspect, the utility model provides a top cap subassembly, which comprises: a top cap, the top cap is provided with a pole hole and a deformation structure, the deformation structure is arranged on the circumferential outside of the pole hole, and the groove is located on the outside of the top cap or the inside of the top cap.
[0005] In one embodiment, the deformation structure is a groove, the groove is annularly arranged around the pole hole, and the groove is circular or polygonal.
[0006] In one embodiment, a plurality of grooves are arranged, each groove is arc-shaped, and the plurality of grooves are symmetrically arranged about the center of the pole hole.
[0007] In one embodiment, a plurality of grooves are arranged, the grooves are straight or wavy, and the grooves are symmetrically arranged on both sides of the pole hole.
[0008] In one embodiment, the top cap subassembly further comprises a protrusion, the protrusion is arranged on the circumferential outside of the pole hole, the groove is arranged on one of the outside of the top cap and the inside of the top cap, and the protrusion is arranged on the other one of the outside of the top cap and the inside of the top cap.
[0009] In one embodiment, the protrusion and the groove are coincident in the orthographic projection of the top cap along the axial direction of the pole hole.
[0010] In one embodiment, the inner wall of the pole hole is provided with a first step and a second step, and the connection part of the first step and the second step has a reinforcing structure.
[0011] In one embodiment, the reinforcing structure is arc-shaped transition from the first step to the second step.
[0012] In a second aspect, the utility model also provides a battery shell, the battery shell includes the casing, the pole and the top cover subassembly of any above embodiment, the casing and the top cover subassembly enclose and form the enclosed space, the pole is installed in the pole hole.
[0013] In a third aspect, the utility model also provides a power battery, the power battery includes the electric core and the battery shell of above embodiment, the electric core is installed in the enclosed space of battery shell.
[0014] The utility model discloses the embodiment, will have the following beneficial effects:
[0015] The top cover of the top cover subassembly has a pole hole and a deformation structure, the deformation structure is arranged on the circumferential outer side of the pole hole, and the deformation structure is located on the outer side of the top cover or the inner side of the top cover. Since the thickness of the connection position of the existing top cover and the pole is thinned, the internal air pressure of the top cover is greater than the external air pressure during the test of the top cover subassembly, and air leakage will occur at the connection position of the top cover and the pole. Therefore, since the deformation structure is arranged, it is easier to deform the position of the top cover where the deformation structure is arranged during the test of the top cover subassembly, thereby avoiding deformation and air leakage at the connection position of the top cover and the pole, and meeting the test requirements. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0017] Wherein:
[0018] Figure 1 It is the axial schematic view of the top cover subassembly in an embodiment.
[0019] Figure 2 It is the side view of the top cover subassembly shown in the figure. Figure 1
[0020] Figure 3 It is the sectional view of the top cover subassembly shown in the figure in A-A direction. Figure 2
[0021] Figure 4 It is the local enlarged schematic view of B part in the top cover subassembly shown in the figure. Figure 3
[0022] Figure 5 A schematic view of a top cover assembly in one embodiment.
[0023] Figure 6 A schematic view of a top cover assembly in one embodiment.
[0024] Reference signs:
[0025] 1, top cover; 11, pole hole; 2, weakening rib; 3, protrusion; 100, pole. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0027] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0028] In the description of the utility model, it should be explained that, if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the utility model product is usually placed, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.
[0029] In addition, if the terms "first", "second" and the like are used only for distinguishing description, and cannot be understood as indicating or implying relative importance.
[0030] It should be explained that, in the case of no conflict, the features in the embodiments of the utility model can be combined with each other.
[0031] Please combine Figures 1 to 6 with the drawings, the top cover assembly provided by the utility model will be described. The top cover assembly is used in the battery shell of the power battery.
[0032] The top cover assembly comprises: a top cover 1, the top cover 1 has a pole hole 11 and a deformation structure, the deformation structure is arranged on the circumferential outer side of the pole hole 11, and the deformation structure is located on the outer side of the top cover 1 or the inner side of the top cover 1.
[0033] It can be understood that the top cover 1 of the top cover assembly has a pole hole 11 and a deformation structure, the deformation structure is arranged on the circumferential outer side of the pole hole 11, and the deformation structure is located on the outer side of the top cover 1 or the inner side of the top cover 1. Due to the thinning of the thickness of the connection position of the existing top cover 1 and the pole 100, the internal air pressure of the top cover 1 is greater than the external air pressure during the test of the top cover assembly, and air leakage will occur at the connection position of the top cover 1 and the pole 100. Therefore, due to the arrangement of the deformation structure, the deformation structure of the top cover 1 is more easily deformed during the test of the top cover assembly, thereby avoiding air leakage caused by deformation at the connection position of the top cover 1 and the pole 100, and achieving the test requirements.
[0034] In addition, due to the arrangement of the deformation structure, the deformation structure of the top cover 1 will be deformed during the test of the top cover assembly, so that the top cover 1 can be thinner, thereby saving costs.
[0035] In an embodiment, as shown in Figure 5 , the deformation structure is a groove 2, the groove 2 is arranged around the pole hole 11, and the groove 2 is circular or polygonal. Specifically, the groove 2 has various shapes, such as a circular shape or a polygonal shape, for example, a square shape.
[0036] In an embodiment, as shown in Figure 6 , a plurality of grooves 2 are arranged, each groove 2 is arc-shaped, and the plurality of grooves 2 are symmetrically arranged about the center of the pole hole 11. In this way, the groove 2 has various arrangement shapes.
[0037] In the embodiment, the top cover 1 assembly further includes a protrusion 3, the protrusion 3 is arranged on the circumferential outer side of the pole hole 11, the groove 2 is arranged on one of the outer side of the top cover 1 and the inner side of the top cover 1, and the protrusion 3 is arranged on the other of the outer side of the top cover 1 and the inner side of the top cover 1. Specifically, when the groove 2 is arranged on the outer side of the top cover 1, the protrusion 3 is arranged on the inner side of the top cover 1, and when the groove 2 is arranged on the inner side of the top cover 1, the protrusion 3 is arranged on the outer side of the top cover 1. In this way, during the test of the top cover assembly, deformation will occur at the positions of the groove 2 and the protrusion 3 of the top cover 1.
[0038] Specifically, the orthographic projection of the protrusion 3 and the groove 2 on the top cover 1 along the axial direction of the pole hole 11 coincides.
[0039] In an embodiment, as shown in Figure 1 and Figure 4 , the groove 2 and the protrusion 3 have various arrangement modes:
[0040] In one embodiment, a plurality of grooves 2 are arranged, the groove 2 is linear, and the groove 2 is symmetrically arranged on both sides of the pole hole 11, a plurality of protrusions 3 are arranged, and the protrusion 3 is arranged one by one corresponding to the groove 2. In this way, the top cover 1 can be deformed at the positions of the linear groove 2 and the protrusion 3.
[0041] In another embodiment, the plurality of grooves 2 are arranged symmetrically on both sides of the pole hole 11, and the plurality of protrusions 3 are arranged correspondingly to the plurality of grooves 2.
[0042] In an embodiment, the inner wall of the pole hole 11 is provided with a first step and a second step, and the connection between the first step and the second step is provided with a reinforcing structure. The reinforcing structure is arranged at the connection between the first step and the second step, so that the inner wall of the pole hole 11 increases in structural strength, thereby reducing the deformation of the top cover 1 at the position of the pole 100 to meet the test requirements. Specifically, the reinforcing structure is an arc-shaped transition from the first step to the second step.
[0043] The utility model also provides a kind of battery shell, battery shell includes shell, pole 100 and the top cover 1 component of any embodiment described above, shell and top cover 1 component are enclosed to form enclosed space, pole 100 is installed in pole hole 11. Specifically, pole 100 is fixed in pole hole 11 by encapsulation.
[0044] It can be understood that the battery shell of the utility model uses the top cover assembly described above, so that
[0045] The top cover 1 of the top cover assembly has a pole hole 11 and a deformation structure, the deformation structure is arranged on the circumferential outer side of the pole hole 11, and the deformation structure is located on the outer side of the top cover 1 or the inner side of the top cover 1. Since the thickness of the connection position between the existing top cover 1 and the pole 100 is thinned, the internal air pressure of the top cover 1 is greater than the external air pressure during the test of the top cover assembly, and air leakage will occur at the connection position between the top cover 1 and the pole 100. Therefore, since the deformation structure is arranged, it is easier to deform at the position of the deformation structure of the top cover 1 during the test of the top cover assembly, thereby avoiding air leakage caused by deformation at the connection position between the top cover 1 and the pole 100, to meet the test requirements.
[0046] In addition, since the deformation structure is arranged, the top cover 1 will deform at the position of the deformation structure during the test of the top cover assembly, so that the top cover 1 can be thinner, thereby saving costs.
[0047] The utility model also provides a kind of power battery, power battery includes electric core and the battery shell of the embodiment described above, and electric core is installed in the enclosed space of battery shell.
[0048] It can be understood that the power battery of the utility model uses the top cover assembly of the battery shell, so that the top cover 1 of the top cover assembly has the pole hole 11 and the deformation structure, the deformation structure is arranged on the circumferential outside of the pole hole 11, and the deformation structure is located on the outside of the top cover 1 or the inside of the top cover 1. Since the thickness of the connecting position of the existing top cover 1 and the pole 100 is thinned, the internal air pressure of the top cover 1 is greater than the external air pressure during the test of the top cover assembly, and air leakage will occur at the connecting position of the top cover 1 and the pole 100. Therefore, since the deformation structure is arranged, the deformation structure position of the top cover 1 is deformed more easily during the test of the top cover assembly, thereby avoiding air leakage caused by deformation at the connecting position of the top cover 1 and the pole 100, so as to meet the test requirements.
[0049] In addition, since the deformation structure is arranged, the deformation structure position of the top cover 1 is deformed during the test of the top cover assembly, so that the top cover 1 can be thinner, thereby saving the cost.
[0050] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.
[0051] The above only discloses the preferred embodiments of the utility model, and of course cannot limit the scope of the utility model, so equivalent changes made according to the utility model claims still belong to the scope covered by the utility model.
Claims
1. A cap assembly, characterized by, The application relates to a battery shell and a power battery. The top cover is provided with a pole hole and a deformation structure, the deformation structure is arranged on the circumferential outer side of the pole hole, and the deformation structure is located on the outer side of the top cover or the inner side of the top cover.
2. The roof assembly of claim 1, wherein, The deformation structure is a groove, the groove is arranged around the pole hole, and the groove is circular or polygonal.
3. The roof assembly of claim 2, wherein, The groove is provided with a plurality of arc-shaped grooves, and the plurality of grooves are symmetrically arranged about the center of the pole hole.
4. The roof assembly of claim 2, wherein, The groove is provided with a plurality of straight-line-shaped or wavy grooves, and the grooves are symmetrically arranged on the two sides of the pole hole.
5. The roof assembly of any one of claims 2 to 4, wherein, The top cover assembly further comprises a protrusion, the protrusion is arranged on the circumferential outer side of the pole hole, the groove is arranged on one of the outer side of the top cover and the inner side of the top cover, and the protrusion is arranged on the other one of the outer side of the top cover and the inner side of the top cover.
6. The roof assembly of claim 5, wherein, The protrusion and the groove are coincident in the orthographic projection of the top cover along the axial direction of the pole hole.
7. The roof assembly of claim 1, wherein, The inner wall of the pole hole is provided with a first step and a second step, and the connecting part of the first step and the second step is provided with a reinforcing structure.
8. The roof assembly of claim 7, wherein, The reinforcing structure is arc-shaped transition from the first step to the second step.
9. A battery housing, characterized by The battery shell comprises a shell, a pole and the top cover assembly as claimed in any one of claims 1 to 8, the shell and the top cover assembly enclose a closed space, and the pole is installed in the pole hole.
10. A power cell, characterized by The power battery comprises a cell and the battery shell as claimed in claim 9, and the cell is installed in the closed space of the battery shell.