Pole assembly, cover plate and battery
By introducing high-temperature resistant insulating components and sealing rings into the terminal assembly, the insulation and safety issues of the battery in high-temperature environments are solved, and the stability and sealing performance of the insulation connection at high temperatures are improved.
Patent Information
- Application Number
- CN202422622136.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-10-29
AI Technical Summary
Existing batteries have poor insulation and safety performance in high-temperature environments, and plastic parts are prone to melting and deformation, leading to short circuits between the terminals and the cover plate.
The design employs a pole assembly, which includes a pole body, an upper plastic layer, an insulating component, and a sealing ring. The insulating component is made of a high-temperature resistant material, and the sealing ring is positioned between the insulating component and the pole body to ensure an insulating connection at high temperatures. The assembly stability is also improved through the receiving groove and the connecting groove.
In high-temperature environments, the insulating components maintain the insulating connection between the terminals and the cover plate, preventing short circuits, improving the battery's insulation and safety performance, enhancing sealing performance, and ensuring battery stability.
Smart Images
Figure CN223612634U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field especially relates to a pole assembly, cover plate and battery. BACKGROUND
[0002] With the progress of technology, batteries are widely used in industrial production, transportation, energy storage and other fields.
[0003] The battery includes a cover plate, a shell and a battery cell. The cover plate is fixedly connected with the shell and encloses a cavity for accommodating the battery cell. The cover plate is provided with a pole. The pole is electrically connected with the battery cell. In order to avoid short circuit between the pole and the cover plate, a plastic part is usually arranged between the pole and the cover plate to realize insulation connection.
[0004] However, the general plastic part is easy to melt and deform when the temperature is higher than 300°, so that the plastic part is difficult to maintain insulation performance, thereby reducing the safety of the battery, and there is a problem of poor insulation performance and safety performance of the battery in a high temperature environment. SUMMARY
[0005] The utility model aims at providing a pole assembly, cover plate and battery to solve the problem of poor insulation performance and safety performance of the battery in a high temperature environment.
[0006] To achieve this purpose, the utility model adopts the following technical scheme:
[0007] In a first aspect, a pole assembly includes: a pole body, the pole body includes a first part and a second part, the first part protrudes the second part; an upper plastic, the upper plastic is connected with the first part side wall; an insulation part, the insulation part is arranged on the side of the first part facing the second part and connected with the upper plastic; a sealing ring, the sealing ring is arranged between the second part and the insulation part.
[0008] As a preferred, the end face of the first part facing the second part is spaced apart from the end face of the insulation part facing the first part.
[0009] As a preferred, the upper plastic is provided with a containing groove and a connecting groove, the insulation part is at least partially located in the containing groove, and the first part is at least partially located in the connecting groove, so that the insulation part and the first part are both clamped with the upper plastic, and the containing groove and the connecting groove are spaced apart.
[0010] As a preferred, the depth of the containing groove is greater than the depth of the connecting groove.
[0011] As a preferred, the width of the sealing ring is greater than the width of the insulation part; and / or, the thickness of the sealing ring is greater than the thickness of the insulation part.
[0012] Preferably, the thickness of the insulating member is 0.55 mm; and / or, the thickness of the sealing ring is 0.7 mm.
[0013] Preferably, the insulating member is made of ceramic material.
[0014] In a second aspect, a cover plate comprises a cover plate body and the pole post assembly as described above, and the pole post body is fixedly arranged on the cover plate body.
[0015] Preferably, the upper plastic, the insulating member and the sealing ring are arranged on the side of the cover plate body facing the first part.
[0016] In a third aspect, a battery comprises a shell, an electric core and the cover plate as described above, and the cover plate body is fixedly connected with the shell, and the electric core is arranged in the shell.
[0017] The utility model has the advantages of:
[0018] The pole post assembly comprises a pole post body, an upper plastic, an insulating member and a sealing ring, the pole post body comprises a first part and a second part, the first part protrudes the second part, the upper plastic is connected with the side wall of the first part, the insulating member is arranged on the side of the first part facing the second part and is connected with the upper plastic, and the sealing ring is arranged between the second part and the insulating member.
[0019] Therefore, even if the upper plastic melts and loses the insulation performance in a high-temperature environment, the insulating member can keep the pole post body and the cover plate body in insulation connection, avoid the short circuit phenomenon between the pole post body and the cover plate body, improve the insulation performance and safety performance of the battery in the high-temperature environment, and the sealing ring can enhance the sealing performance between the pole post body and the cover plate body and the sealing performance between the second part and the insulating member, thereby improving the safety performance of the battery. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 Fig. 1 is a structural schematic view of a battery in an embodiment of the utility model;
[0021] Figure 2 Fig. 2 is a partial sectional view of the battery in the embodiment of the utility model;
[0022] Figure 3 Fig. 3 is an enlarged view of A in Fig. 2. Figure 2
[0023] In the drawings:
[0024] 1, pole post body; 11, first part; 12, second part; 2, upper plastic; 21, accommodating groove; 22, connecting groove; 3, insulating member; 4, sealing ring; 5, cover plate body; 6, lower plastic; 7, shell. DETAILED DESCRIPTION
[0025] 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 used to explain the utility model and not 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 the convenience of description, not all the structures.
[0026] In the description of the utility model, unless otherwise explicitly specified 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 communication between two elements or the interaction relationship between 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.
[0027] In the utility model, unless otherwise explicitly specified 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 "above" 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.
[0028] 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 cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.
[0029] Referring to Figures 1-3 , in the first aspect, the utility model provides a pole assembly, including pole body 1, upper plastic 2, insulating piece 3 and sealing ring 4, pole body 1 includes first part 11 and second part 12, first part 11 protrudes second part 12 and is arranged, that is, the cross-sectional area of first part 11 is greater than the cross-sectional area of second part 12, upper plastic 2 is connected with the side wall of first part 11, insulating piece 3 is arranged on the side of first part 11 towards second part 12 and is connected with upper plastic 2, sealing ring 4 is arranged between second part 12 and insulating piece 3.
[0030] In the embodiment, the pole body 1 is vertically arranged, the first part 11 is arranged on the side of the pole body 1 away from the battery cell, the first part 11 is in a stepped structure, the cross-sectional area of the end of the first part 11 away from the second part 12 is greater than the cross-sectional area of the end of the first part 11 toward the second part 12, and the first part 11 and the second part 12 are integrally arranged; the upper plastic 2 is sleeved on the first part 11, the insulating part 3 is in a ring structure, the outer wall of the insulating part 3 abuts against the inner wall of the upper plastic 2, the insulating part 3 is sleeved on the sealing ring 4, the inner wall of the insulating part 3 abuts against the outer wall of the sealing ring 4, the upper plastic 2, the insulating part 3 and the sealing ring 4 are all made of insulating materials, the melting point of the material of the insulating part 3 is higher than the melting point of the material of the upper plastic 2, and the inner wall of the sealing ring 4 abuts against the outer wall of the second part 12.
[0031] Therefore, when the battery is in a high-temperature environment, if the upper plastic 2 melts and loses the insulation performance, since the insulating part 3 is made of a high-temperature-resistant material, the insulating part 3 can maintain the insulation connection between the pole body 1 and the cover body 5, so as to avoid the short circuit phenomenon between the pole body 1 and the cover body 5, and improve the insulation performance and safety performance of the battery in the high-temperature environment; the insulating part 3 abuts against the sealing ring 4 and the upper plastic 2 respectively, so as to improve the sealing performance between the pole body 1 and the cover body 5.
[0032] It can be understood that the upper plastic 2 can be made of a plastic material, and the sealing ring 4 can be made of a rubber material, and the specific materials of the upper plastic 2, the insulating part 3 and the sealing ring 4 can be flexibly adjusted according to actual needs, which will not be enumerated here.
[0033] Referring to Figure 3 In some embodiments, the insulating part 3 is made of a ceramic material.
[0034] Therefore, the ceramic material has a high resistivity, can effectively isolate the current, has high-temperature resistance and chemical stability, can withstand a high temperature and maintain the insulation performance, is not easy to chemically react with the electrolyte, and is not easy to be extruded and deformed, so as to improve the structural strength of the connection between the pole body 1 and the cover body 5 and improve the insulation performance and safety performance of the battery in the high-temperature environment.
[0035] It can be understood that in other embodiments, the insulating part 3 can also be made of a high-temperature-resistant silica gel material, which can maintain the insulation performance and safety performance in a high-temperature environment, and is not limited to ceramic materials and silica gel materials, which will not be described here.
[0036] Referring to Figure 3 In some embodiments, the end face of the first part 11 toward the second part 12 and the end face of the insulating part 3 toward the first part 11 are arranged with a gap, that is, there is a gap between the end face of the first part 11 toward the second part 12 and the end face of the insulating part 3 toward the first part 11.
[0037] Therefore, when the insulating piece 3 is made of ceramic material, the gap between the first part 11 and the insulating piece 3 can avoid the excessive pressure of the pole body 1 on the insulating piece 3 when the pole assembly is assembled on the cover body 5, so as to avoid the damage of the insulating piece 3 and improve the safety performance of the pole assembly. Since the sealing ring 4 is tightly connected with the cover body 5 and the pole body 1 respectively, the gap between the first part 11 and the insulating piece 3 can avoid affecting the sealing performance of the connection between the pole body 1 and the cover body 5.
[0038] It can be understood that the end surface of the first part 11 towards the second part 12 can also abut the end surface of the insulating piece 3 towards the first part 11, which will not be described here.
[0039] Referring to Figure 3 In some embodiments, the upper plastic 2 is provided with a receiving groove 21 and a connecting groove 22, the insulating piece 3 is at least partially located in the receiving groove 21, and the first part 11 is at least partially located in the connecting groove 22, so that the insulating piece 3 and the first part 11 are clamped with the upper plastic 2, and the receiving groove 21 and the connecting groove 22 are spaced apart in the height direction of the upper plastic 2.
[0040] In the embodiment, the receiving groove 21 and the connecting groove 22 are both annular grooves, and the receiving groove 21 and the connecting groove 22 are coaxially arranged, the side wall and part of the top surface of the insulating piece 3 abut the inner wall of the receiving groove 21, part of the side wall and the stepped surface of the first part 11 abut the inner wall of the connecting groove 22, and the top surface of the first part 11 protrudes from the top surface of the upper plastic 2.
[0041] Therefore, the sealing ring 4 and the receiving groove 21 can limit the relative position of the insulating piece 3 and the pole body 1, and the connecting groove 22 can limit the position of the first part 11 and the upper plastic 2, so as to improve the assembly stability of the pole assembly. Since the insulating piece 3 is stably arranged on the pole body 1, the insulating piece 3 is not easy to be deviated and fall off in a high temperature environment, so as to improve the insulation performance and safety performance of the battery in the high temperature environment.
[0042] It can be understood that the positions of the receiving groove 21 and the connecting groove 22 on the upper plastic 2 can be adjusted according to the shape of the pole assembly, which will not be limited in the embodiment.
[0043] Referring to Figure 3 In some embodiments, the depth of the receiving groove 21 is greater than the depth of the connecting groove 22. That is, the inner side wall of the receiving groove 21 is closer to the outer wall of the upper plastic 2 than the inner side wall of the connecting groove 22.
[0044] In the embodiment, the projection of the first part 11 on the side wall of the one end of the insulating member 3 in the thickness direction of the pole body 1 is located inside the projection of the insulating member 3 in the thickness direction of the pole body 1, that is, the projection of the first part 11 in the thickness direction of the pole body 1 partially overlaps the projection of the insulating member 3 in the thickness direction of the pole body 1.
[0045] In this way, when the battery is in a high-temperature environment, even if the upper plastic 2 melts due to high temperature, the insulating member 3 and the sealing ring 4 can prevent the first part 11 from abutting against the cover body 5 and forming a short circuit, thereby improving the insulation performance of the battery in a high-temperature environment, and further improving the safety performance and stability performance of the battery.
[0046] It can be understood that the depth of the accommodating groove 21 can also be equal to or less than the depth of the connecting groove 22, and the depth of the accommodating groove 21 and the depth of the connecting groove 22 can be flexibly adjusted according to the size of the insulating member 3 and the first part 11, which will not be enumerated here.
[0047] Referring to Figure 3 In some embodiments, the width of the sealing ring 4 is greater than the width of the insulating member 3, and the thickness of the sealing ring 4 is greater than the thickness of the insulating member 3. In the embodiment, the sealing ring 4 abuts against the side of the first part 11 facing the second part 12 and the cover body 5 at both ends, respectively, and the end face of the sealing ring 4 facing the first part 11 protrudes from the end face of the insulating member 3 facing the first part 11.
[0048] In this way, the sealing ring 4 can enhance the sealing performance of the connection between the pole body 1 and the cover body 5, and further insulate the connection between the pole body 1 and the cover body 5, thereby improving the insulation performance and safety performance of the battery; the thickness of the sealing ring 4 is greater than the thickness of the insulating member 3, so that the both ends of the sealing ring 4 can abut against the pole body 1 and the cover body 5 tightly after the pole assembly is assembled.
[0049] It can be understood that the width of the sealing ring 4 can also be equal to or less than the width of the insulating member 3, and the thickness of the sealing ring 4 can also be equal to or less than the thickness of the insulating member 3, and the size of the sealing ring 4 and the insulating member 3 can be flexibly adjusted according to the size of the pole body 1, which will not be enumerated here.
[0050] Referring to Figure 3 In some embodiments, the thickness of the insulating member 3 is 0.55 mm, and the thickness of the sealing ring 4 is 0.7 mm.
[0051] In this way, it can be ensured that the insulating member 3 has sufficient thickness to insulate the connection between the pole body 1 and the cover body 5, thereby improving the insulation performance of the battery in a high-temperature environment, and the thickness of the sealing ring 4 is greater than the thickness of the insulating member 3, thereby improving the sealing performance of the connection between the pole body 1 and the cover body 5.
[0052] It can be understood that the thickness of the insulation piece 3 and the thickness of the sealing ring 4 can be flexibly adjusted according to actual needs, which will not be repeated here.
[0053] Referring to Figure 1 , the utility model provides a kind of cover plate, including cover plate body 5 and pole assembly, pole body 1 is fixedly arranged in cover plate body 5. Among them, cover plate body 5 is light aluminum sheet structure, pole body 1 is fixedly connected with cover plate body 5 by riveting.
[0054] Further, the side of cover plate body 5 away from first part 11 (that is, the side of cover plate body 5 away from the outside) is fixedly connected with lower plastic 6, the shape of lower plastic 6 is adapted to the shape of cover plate body 5, and lower plastic 6 is made of insulating material.
[0055] It can be understood that the materials of lower plastic 6 and upper plastic 2 can be the same or different, and the present embodiment does not limit this.
[0056] Referring to Figures 1-3 In some embodiments, upper plastic 2, insulation piece 3 and sealing ring 4 are all arranged on the side of cover plate body 5 towards first part 11 (that is, the side of cover plate body 5 towards the outside).
[0057] In this way, arranging upper plastic 2, insulation piece 3 and sealing ring 4 on the same side of cover plate body 5 can facilitate the assembly of pole assembly to cover plate body 5 and improve the sealing performance of the connection between cover plate body 5 and pole body 1. When the battery is in a high-temperature environment, insulation piece 3 can separate pole body 1 from cover plate body 5, preventing short circuit between pole body 1 and cover plate body 5 and battery overheating or even explosion, and improving the safety performance of the battery.
[0058] Referring to Figure 1 , the utility model provides a kind of battery, including shell 7, electric core (not shown in the figure) and cover plate, cover plate body 5 is fixedly connected with shell 7, and electric core is arranged in the inside of shell 7. Among them, shell 7 and cover plate body 5 are fixedly connected by welding, and electric core is arranged in the space enclosed by shell 7 and cover plate body 5;Shell 7 is hollow cylindrical structure.
[0059] In this way, when the battery is in a high-temperature environment, insulation piece 3 can keep insulation connection between pole body 1 and cover plate body 5, and sealing ring 4 can enhance the sealing performance of the connection between pole body 1 and cover plate body 5, thereby improving the safety performance of the battery in a high-temperature environment.
[0060] It can be understood that the shape of the battery is not limited to cylindrical, but can also be square or other structures, and the specific shape of the battery can be flexibly adjusted, which will not be repeated here.
[0061] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.
Claims
1. A pole assembly, characterized by The application relates to a polar column assembly. The polar column body (1) comprises a first part (11) and a second part (12), the first part (11) protrudes from the second part (12); An upper plastic (2) is connected with the sidewall of the first part (11); An insulation piece (3) is arranged on the side of the first part (11) facing the second part (12) and is connected with the upper plastic (2); A sealing ring (4) is arranged between the second part (12) and the insulation piece (3).
2. The pole assembly of claim 1, wherein, The end surface of the first part (11) facing the second part (12) is arranged in a spaced manner with the end surface of the insulation piece (3) facing the first part (11).
3. The pole assembly of claim 1, wherein, The upper plastic (2) is provided with a containing groove (21) and a connecting groove (22), the insulation piece (3) is at least partially located in the containing groove (21), and the first part (11) is at least partially located in the connecting groove (22), so that the insulation piece (3) and the first part (11) are clamped with the upper plastic (2), and the containing groove (21) and the connecting groove (22) are arranged in a spaced manner.
4. The pole assembly of claim 3, wherein, The depth of the containing groove (21) is greater than the depth of the connecting groove (22).
5. The pole assembly of any of claims 1-4, wherein, The width of the sealing ring (4) is greater than the width of the insulation piece (3); and / or the thickness of the sealing ring (4) is greater than the thickness of the insulation piece (3).
6. The pole assembly of any one of claims 1-4, wherein, The thickness of the insulation piece (3) is 0.55 mm; and / or the thickness of the sealing ring (4) is 0.7 mm.
7. The pole assembly of any of claims 1-4, wherein, The insulation piece (3) is made of ceramic material.
8. A cover plate characterized by The application further relates to a cover plate assembly comprising a cover plate body (5) and the polar column assembly according to any one of claims 1-7, and the polar column body (1) is fixedly arranged on the cover plate body (5).
9. The cover sheet of claim 8, wherein, The upper plastic (2), the insulation piece (3) and the sealing ring (4) are arranged on the side of the cover plate body (5) facing the first part (11).
10. A battery, characterized by The application further relates to a battery comprising a shell (7), a battery core and the cover plate according to any one of claims 8-9, the cover plate body (5) is fixedly connected with the shell (7), and the battery core is arranged in the shell (7).