Battery cover plate assembly, battery shell and battery monomer
By setting a rounded chamfer at the corner of the mounting hole of the battery cover assembly, leaving a gap to accommodate the compression deformation of the sealing ring, the problem of the sealing ring being prone to cracking at high temperatures is solved, achieving high airtightness and insulation isolation of the battery, and improving battery safety.
Patent Information
- Application Number
- CN202520227571.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-02-13
AI Technical Summary
In the prior art, the contact point between the mounting hole and the sealing ring of the battery casing is a right-angle corner, which makes the sealing ring prone to cracking at high temperatures, resulting in airtightness leakage and poor insulation.
A rounded chamfer is provided at the corner of the mounting hole of the battery cover assembly, leaving a gap to accommodate the compression deformation of the sealing ring. After compression, the sealing ring can fully fit the rounded chamfer, improving the sealing performance.
The rounded chamfer design prevents the sealing ring from being excessively compressed and deformed at high temperatures, improving the airtightness and insulation of the battery cover assembly and enhancing battery safety.
Smart Images
Figure CN223612509U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field especially relates to a battery cover plate subassembly, battery shell and battery monomer. BACKGROUND
[0002] With the rapid development of new energy, lithium ion battery application is more widely. Usually, the battery includes shell, electric core and pole, etc., the electric core is located in the shell, the shell is equipped with mounting hole, and the pole is arranged in the mounting hole and electrically connected with the electric core. In the actual production of the battery, in order to improve the air tightness of the shell and the insulation isolation between the pole and the shell, a sealing ring needs to be arranged between the pole and the shell. The sealing ring in the battery is usually composed of fluorine rubber material, and the compression ratio is usually not less than 30%, to seal the insulation isolation between the shell and the pole.
[0003] But the mounting hole on the shell in the prior art is in contact with the sealing ring at a right angle corner, and the sealing ring compression deformation and the right angle corner are extruded mutually. Since the right angle corner itself is poor in adhesion with the sealing ring, in order to increase the air tightness of the shell, the compression amount of the sealing ring will be increased. But at this time, the sealing ring is extruded more seriously at the right angle corner, especially during the working period of the electric core under long-term high temperature, the shell profile and the contact position of the sealing ring itself become fragile, and the right angle of the right angle corner is sharp, so the sealing ring is prone to cracking and causing air tightness leakage.
[0004] Therefore, it is urgent to provide a battery cover plate subassembly, battery shell and battery monomer to solve the above problems. INVENTION CONTENTS
[0005] The first purpose of the utility model is to provide a battery cover plate subassembly, which is good in air tightness and insulation isolation effect.
[0006] To achieve this purpose, the utility model adopts the following technical scheme:
[0007] The battery cover plate subassembly comprises:
[0008] A cover plate sheet is provided with a first mounting hole;
[0009] A pole is arranged in the first mounting hole, and two ends of the pole are located on the opposite sides of the cover plate sheet towards or away from the electric core respectively;
[0010] A sealing ring is located on the side of the cover plate sheet away from the electric core and clamped between the cover plate sheet and the pole;
[0011] The circular arc chamfer is arranged at the opening edge corner of the first mounting hole away from the side of the battery cell, so that a gap is left between the pole and the cover plate sheet at the circular arc chamfer, and the sealing ring can seal the gap after compression deformation.
[0012] As an optional technical solution of the battery cover plate assembly, the thickness of the cover plate sheet ranges from 0.6 mm to 0.8 mm, and the radius R of the circular arc chamfer ranges from 0.2 mm to 0.4 mm.
[0013] As an optional technical solution of the battery cover plate assembly, the pole includes a pole body, a top cover and a bottom disc, the top cover and the bottom disc are respectively arranged at two ends of the pole body, the pole body is arranged in the first mounting hole, the sealing ring is arranged between the top cover and the cover plate sheet, and the bottom disc abuts against the side of the cover plate sheet facing the battery cell.
[0014] As an optional technical solution of the battery cover plate assembly, the battery cover plate assembly further includes a lower plastic, the lower plastic is arranged on the side of the cover plate sheet facing the battery cell, the second mounting hole is opposite to the first mounting hole, the pole body is arranged in the second mounting hole, at least part of the lower plastic is arranged between the cover plate sheet and the bottom disc, and the inner side wall of the second mounting hole abuts against the side wall of the pole body.
[0015] As an optional technical solution of the battery cover plate assembly, the lower plastic is provided with a boss, the boss extends along the circumference of the second mounting hole and is arranged in a closed loop, and the boss abuts against the cover plate sheet.
[0016] As an optional technical solution of the battery cover plate assembly, the boss is provided with a protrusion, the protrusion extends along the circumference of the second mounting hole and is arranged in a closed loop, and the protrusion is arranged between the side wall of the pole body and the inner side wall of the first mounting hole.
[0017] As an optional technical solution of the battery cover plate assembly, the lower plastic is provided with a groove away from the cover plate sheet, the groove extends along the circumference of the second mounting hole and is arranged in a closed loop, the groove extends to the boss, and the bottom disc can abut against the groove bottom.
[0018] As an optional technical solution of the battery cover plate assembly, the battery cover plate assembly further includes a plastic wrapping, the plastic wrapping is arranged on the side of the cover plate sheet away from the battery cell and wraps the periphery of the top cover.
[0019] The second purpose of the utility model is to provide a battery shell which is good in air tightness.
[0020] To achieve the above purpose, the utility model discloses the following technical scheme:
[0021] The battery shell comprises a shell body and the battery cover plate assembly, and the cover plate piece is arranged at the opening of the shell body.
[0022] The third purpose of the utility model is to provide a battery monomer, which is high in safety.
[0023] To achieve the above purpose, the utility model discloses the following technical scheme:
[0024] The battery monomer comprises an electric core and the battery shell, and the electric core is located in the battery shell.
[0025] The utility model has the advantages of:
[0026] The battery cover plate assembly provided by the utility model comprises a cover plate piece, a pole and a sealing ring. The cover plate piece is provided with a first mounting hole, and the cover plate piece is provided with a circular arc chamfer at the opening edge corner of the side of the first mounting hole away from the electric core, so that a gap is left between the pole and the circular arc chamfer of the cover plate piece, and the sealing ring can seal the gap after compression deformation. Compared with the right-angle corner of the contact part of the pole mounting hole and the sealing ring in the prior art, the battery cover plate assembly sets the circular arc chamfer at the corner of the first mounting hole of the cover plate piece, so that the gap is left between the pole and the circular arc chamfer of the cover plate piece, the space is reserved for the extrusion deformation of the sealing ring, so that the sealing ring does not become fragile and cracked to cause air tightness leakage due to excessive extrusion deformation under long-term high temperature, and meanwhile, the sealing ring is more easily fully attached and compressed after compression deformation, and the air tightness of the corner of the first mounting hole of the battery cover plate can be further improved. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 It is a sectional view of the battery cover plate assembly provided by the utility model embodiment;
[0028] Figure 2 It is Figure 1 The enlarged view at A.
[0029] In the drawing:
[0030] 100, cover plate piece; 110, circular arc chamfer; 200, pole; 210, pole body; 220, top cover; 230, bottom disc; 300, sealing ring; 400, lower plastic; 410, boss; 420, protrusion; 430, groove; 500, plastic package. DETAILED DESCRIPTION
[0031] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely intended to explain the utility model and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.
[0032] In the description of the utility model, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0033] In the utility model, unless explicitly defined and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0034] In the description of the embodiment, the terms "up", "down", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to 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. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.
[0035] The embodiment provides a battery cover plate assembly, which is good in air tightness and insulation isolation effect.
[0036] Specifically, as Figure 1 and Figure 2As shown, the battery cover plate assembly includes a cover plate sheet 100, a pole 200, and a sealing ring 300. The cover plate sheet 100 is provided with a first mounting hole, and the pole 200 is arranged in the first mounting hole. The two ends of the pole 200 are located on the opposite sides of the cover plate sheet 100 towards or away from the battery cell. The sealing ring 300 is located on the side of the cover plate sheet 100 away from the battery cell and is clamped between the cover plate sheet 100 and the pole 200. The cover plate sheet 100 is provided with a circular arc chamfer 110 at the corner of the opening edge of the first mounting hole away from the battery cell, so that a gap is left between the pole 200 and the cover plate sheet 100 at the circular arc chamfer 110, and the sealing ring 300 can seal the gap after compression deformation.
[0037] Based on the above design, the cover plate sheet 100 is provided with a first mounting hole for the pole 200 to be arranged and mounted. The two ends of the pole 200 are located on the opposite sides of the cover plate sheet 100 towards or away from the battery cell. One end of the side of the pole 200 towards the battery cell is connected with the battery cell, and one end of the side of the pole 200 away from the battery cell is used for electrical connection with external elements. The sealing ring 300 is located on the side of the cover plate sheet 100 away from the battery cell and is clamped between the cover plate sheet 100 and the pole 200 to seal and insulate the cover plate sheet 100 and the pole 200. The cover plate sheet 100 is provided with a circular arc chamfer 110 at the corner of the opening edge of the first mounting hole away from the battery cell, so that a gap is left between the pole 200 and the cover plate sheet 100 at the circular arc chamfer 110, and the sealing ring 300 can seal the gap after compression deformation. Compared with the prior art in which the contact between the pole mounting hole and the sealing ring is a right-angle corner, a gap is left between the pole 200 and the cover plate sheet 100 at the circular arc chamfer 110, which provides space for the compression deformation of the sealing ring 300 to avoid the sealing ring 300 from becoming fragile and cracking due to excessive compression deformation under long-term high temperature, thereby causing air tightness leakage. At the same time, the sealing ring 300 can seal the gap after compression deformation, which does not affect the air tightness of the battery cover plate assembly, but on the contrary, the sealing ring 300 is more easily fully attached and compressed with the circular arc chamfer 110 after compression deformation, thereby improving the sealing performance of the first mounting hole corner of the battery cover plate.
[0038] In actual production, the thickness of the cover plate sheet 100 is in the range of 0.6mm-0.8mm, and the radius R of the circular arc chamfer 110 is in the range of 0.2mm≤R≤0.4mm. If the radius R of the circular arc chamfer 110 is less than 0.2mm, the circular arc chamfer 110 may not be formed due to material punching flow when the cover plate sheet 100 is stretched and formed. However, if the radius R of the circular arc chamfer 110 is greater than 0.4mm, the contact area between the cover plate sheet 100 and the sealing ring 300 will be small, and the sealing ring 300 may not be fully filled after compression, thereby causing air tightness leakage.
[0039] Exemplarily, in the above case, the radius R of the circular arc chamfer 110 can be 0.2mm, 0.25mm, 0.3mm, 0.35mm or 0.4mm, etc.
[0040] Optionally, as shown in Figure 2 The pole 200 includes a pole body 210, a top cover 220 and a bottom disc 230, the top cover 220 and the bottom disc 230 are respectively located at both ends of the pole body 210, the pole body 210 is arranged in the first mounting hole, the sealing ring 300 is clamped between the top cover 220 and the cover sheet 100, and the bottom disc 230 abuts against the side of the cover sheet 100 facing the battery cell. The top cover 220 and the bottom disc 230 are arranged on the pole 200, so as to facilitate the riveting connection between the pole 200 and the cover sheet 100.
[0041] Further, the battery cover plate assembly further includes a lower plastic 400, the lower plastic 400 is provided with a second mounting hole, the lower plastic 400 is located on the side of the cover sheet 100 facing the battery cell, the second mounting hole is opposite to the first mounting hole, the pole body 210 is arranged in the second mounting hole, at least part of the lower plastic 400 is clamped between the cover sheet 100 and the bottom disc 230, and the inner side wall of the second mounting hole abuts against the side wall of the pole body 210. The lower plastic 400 is used for insulating and isolating the cover sheet 100 and the battery cell, and can seal and insulate the pole 200 and the cover sheet 100.
[0042] Still further, the lower plastic 400 is provided with a boss 410, the boss 410 extends along the circumference of the second mounting hole and is arranged in a closed loop, and the boss 410 abuts against the cover sheet 100. The boss 410 increases the thickness of the lower plastic 400 around the second mounting hole, thereby improving the structural strength of the lower plastic 400 around the second mounting hole.
[0043] Still further, the side of the lower plastic 400 away from the cover sheet 100 is provided with a groove 430, the groove 430 extends along the circumference of the second mounting hole and is arranged in a closed loop, the groove 430 extends to the boss 410, and the bottom disc 230 can abut against the groove bottom of the groove 430. The bottom disc 230 is located in the groove 430, which can not only increase the connection strength of the bottom disc 230 and the lower plastic 400, but also save the internal space of the battery shell.
[0044] Similarly, in order to increase the sealing and insulating property of the lower plastic 400, the boss 410 is provided with a protrusion 420, the protrusion 420 extends along the circumference of the second mounting hole and is arranged in a closed loop, and the protrusion 420 is clamped between the side wall of the pole body 210 and the inner side wall of the first mounting hole. When the lower plastic 400 and the sealing ring 300 are compressed and deformed, they abut against each other, and completely fill the gap between the side wall of the pole 200 and the first mounting hole.
[0045] In the embodiment, in order to install the pole 200 and isolate the pole 200 from the cover plate 100, the battery cover plate assembly further comprises a plastic wrapping 500, which is attached to the side of the cover plate 100 away from the battery cell and wrapped around the periphery of the top cover 220.
[0046] It should be noted that in the embodiment, the sealing ring 300, the lower plastic 400 and the plastic wrapping 500 are all made of rubber material.
[0047] The embodiment further provides a battery shell, which is good in air tightness.
[0048] Specifically, the battery shell comprises a shell body and the battery cover plate assembly described above, and the cover plate 100 is arranged at the opening of the shell body. Due to the arrangement of the circular arc chamfer 110 of the first mounting hole on the cover plate 100, the air tightness of the battery cover plate assembly is improved, and thus the sealing performance of the battery shell is improved.
[0049] Optionally, the cover plate 100 of the battery shell is integrally formed with the shell body.
[0050] The embodiment further provides a battery monomer, which is high in safety.
[0051] Specifically, the battery monomer comprises a battery cell and the battery shell described above, and the battery cell is located in the battery shell. Due to the high air tightness of the battery shell, air tightness leakage is avoided, and the safety of the battery is improved.
[0052] In the embodiment, the battery monomer is a cylindrical battery, i.e., the battery shell is a cylindrical shell, and the cover plate 100 is integrally formed with the shell body.
[0053] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not a limitation on the embodiments of the utility model. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A battery cover plate assembly, characterized by, The battery cover plate assembly comprises: a cover plate sheet (100) provided with a first mounting hole; a pole column (200) penetrating through the first mounting hole, two ends of the pole column (200) being located on opposite sides of the cover plate sheet (100) towards or away from the battery cell; a sealing ring (300) located on the side of the cover plate sheet (100) away from the battery cell and clamped between the cover plate sheet (100) and the pole column (200); wherein the cover plate sheet (100) is provided with a circular arc chamfer (110) at the opening edge corner of the side of the first mounting hole away from the battery cell, so that a gap is left between the pole column (200) and the cover plate sheet (100) at the circular arc chamfer (110), and the sealing ring (300) can seal the gap after compression deformation.
2. The battery cover plate assembly of claim 1, wherein, The thickness dimension of the cover plate sheet (100) ranges from 0.6mm to 0.8mm, and the radius R dimension of the circular arc chamfer (110) ranges from 0.2mm to 0.4mm.
3. The battery cover plate assembly of claim 1, wherein, The pole column (200) comprises a column body (210), a top cover (220) and a bottom disc (230), the top cover (220) and the bottom disc (230) being located at two ends of the column body (210) respectively, the column body (210) penetrating through the first mounting hole, the sealing ring (300) being clamped between the top cover (220) and the cover plate sheet (100), and the bottom disc (230) abutting against the side of the cover plate sheet (100) towards the battery cell.
4. The battery cover plate assembly of claim 3, wherein, The battery cover plate assembly further comprises a lower plastic (400) provided with a second mounting hole, the lower plastic (400) being located on the side of the cover plate sheet (100) towards the battery cell, the second mounting hole being opposite to the first mounting hole, the column body (210) penetrating through the second mounting hole, at least part of the lower plastic (400) being clamped between the cover plate sheet (100) and the bottom disc (230), and the inner side wall of the second mounting hole abutting against the side wall of the column body (210).
5. The battery cover plate assembly of claim 4, wherein, The lower plastic (400) is provided with a boss (410) extending along the circumference of the second mounting hole and arranged in a closed loop, and the boss (410) abuts against the cover plate sheet (100).
6. The battery cover plate assembly of claim 5, wherein, The boss (410) is provided with a protrusion (420) extending along the circumference of the second mounting hole and arranged in a closed loop, and the protrusion (420) is clamped between the side wall of the column body (210) and the inner side wall of the first mounting hole.
7. The battery cover plate assembly of claim 5, wherein, The side of the lower plastic (400) away from the cover plate sheet (100) is provided with a groove (430) extending along the circumference of the second mounting hole and arranged in a closed loop, the groove (430) extending to the boss (410), and the bottom disc (230) can abut against the groove bottom of the groove (430).
8. The battery cover plate assembly of claim 3, wherein, The battery cover plate assembly further comprises a plastic wrapping (500) attached to the side of the cover plate sheet (100) away from the battery cell and wrapping around the periphery of the top cover (220).
9. A battery housing, characterized by The battery cover plate assembly of any one of claims 1-8 is further included in a battery shell, wherein the cover plate sheet (100) is arranged at the opening of the battery shell.
10. A battery cell, characterized by The battery shell of claim 9 is further included in a battery cell, wherein the battery cell is arranged in the battery shell.