Pole core support and battery
By designing the receiving groove and bottom opening structure of the electrode core support component, the problems of short circuit between the electrode tab and the casing and vibration fracture were solved, thereby improving the safety and reliability of the battery.
Patent Information
- Application Number
- CN202423323349.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The tabs of a single battery cell are prone to contact with the casing, causing a short circuit, and are easily broken under vibration. The lack of a limiting structure leads to safety and reliability issues.
The design of the electrode core support component has a receiving groove and a bottom passage. The electrode tab extends into the receiving groove through the bottom passage and is welded to the electrode post through the top opening. Excessive electrode tabs can be compressed in the receiving groove. The electrode tab protection protrusion limits the root. Insulating plastic material is used to prevent short circuits and breakage.
It effectively prevents short circuits between the tabs and the casing, improves battery safety and reliability, prevents breakage caused by vibration and pulling, ensures the tabs are fixed and separated, and enhances battery safety and reliability.
Smart Images
Figure CN223871575U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power and energy storage battery technology, and in particular to a core support and battery. Background Technology
[0002] Currently, a single-cell battery typically includes a casing, a core, an insulating film, a positive electrode cover, and a negative electrode cover. The core is installed inside the casing, and the insulating film wraps around the core and is located between the core and the casing. The positive and negative electrode covers are installed at the openings at both ends of the casing along its height. The tabs are connected to the terminals by welding. It is evident that the tabs, when arbitrarily bent within the space enclosed by the positive electrode cover, the positive end face of the core, and the casing, are highly susceptible to contact with the casing, leading to a short circuit. Furthermore, the tabs, arbitrarily bent within this space without any restraining structure, are easily stretched and broken under vibration. Utility Model Content
[0003] The purpose of this application is to provide a core support component and a battery, which to a certain extent solves the technical problems existing in the prior art where the tabs of the core of a single cell are arbitrarily bent within the space enclosed by the positive electrode cover, the positive end face of the core, and the casing, making it very easy for them to come into contact with the casing and cause a short circuit. Furthermore, since the tabs are arbitrarily bent within the aforementioned space without a limiting structure, they are very easy to be pulled and break under vibration.
[0004] This application provides a core support member having a receiving groove with a top opening and a bottom through-hole at the bottom of the receiving groove, so that the two sides of the core support member along its height direction are connected.
[0005] In the above technical solution, the outer bottom wall of the receiving groove is further provided with two tab protection protrusions, and the two tab protection protrusions are respectively disposed on both sides of the bottom opening along its length direction to form a receiving space for receiving the root of the tab of the electrode core, so as to provide anti-pressure limiting protection for the root of the tab passing through the bottom opening in its height direction.
[0006] In any of the above technical solutions, further, along the height direction of the electrode support, the bottom surface of the electrode protrusion is parallel to the outer wall surface of the receiving groove, and the distance between the two is B, wherein 0.5mm≤B≤3mm.
[0007] In any of the above technical solutions, the bottom opening is further defined as a rectangular opening.
[0008] In any of the above technical solutions, the width of the bottom opening is A, and 1mm≤A≤12mm.
[0009] In any of the above technical solutions, the length direction of the bottom opening is the same as the length direction of the electrode tab, and the length of the bottom opening is L, the length of the electrode tab is W, and W+1mm≤L≤W+10mm.
[0010] In any of the above technical solutions, the outer bottom wall surfaces of the pole core support member located on both sides of the bottom opening are inclined surfaces, and are inclined upward toward the bottom opening.
[0011] In any of the above technical solutions, the inclination angle of the inclined plane is α, and 5°≤α≤30°.
[0012] In any of the above technical solutions, the core support is further made of insulating plastic.
[0013] In any of the above technical solutions, the bottom wall of the receiving groove of the pole core support is further provided with a through vent hole.
[0014] This application also provides a battery including the electrode core support member described in any of the above technical solutions, and thus has all the beneficial technical effects of the electrode core support member, which will not be repeated here.
[0015] In the above technical solution, the battery further includes an electrode core, a casing, a positive electrode top cover, a negative electrode top cover, and an electrode core insulating film; wherein, the electrode core is installed inside the casing; the casing has openings at both ends along its height direction, and the openings at both ends are welded and sealed to the positive electrode top cover and the negative electrode top cover, respectively;
[0016] The electrode core insulating film wraps around the electrode core and is disposed between the electrode core and the housing; the electrode core support is installed between the positive electrode top cover and the positive end of the electrode core, and the positive electrode tab of the electrode core extends through the bottom opening of the electrode core support into the receiving groove of the electrode core support.
[0017] Compared with the prior art, the beneficial effects of this application are as follows:
[0018] When the electrode core support component provided in this application is applied to a battery, preferably, the electrode core support component is installed between the electrode core and the corresponding cover plate, such as the positive electrode cover plate. The electrode core support component is designed with a receiving groove and a bottom opening. The electrode tab of the electrode core can extend into the receiving groove through the bottom opening and be welded to the battery terminal through the top opening of the receiving groove. If the electrode tab is too long after welding to the terminal, it can also be compressed into the receiving groove by the terminal. This can effectively prevent the excessively long electrode tab from contacting the battery casing, such as the aluminum casing, and causing a short circuit, thereby improving the safety and reliability of the battery. Moreover, the electrode core support component can also fix the electrode core, preventing the electrode core from moving around, and at the same time fix the shape of the electrode tab. Under the protection and limitation of the receiving groove, the electrode tab can effectively prevent problems caused by vibration pulling on the electrode tab. At the same time, the bottom wall of the receiving groove separates the electrode tab and the electrode core, avoiding harmful connections, making it safer and more reliable.
[0019] Furthermore, the protective protrusion of the electrode tab is located on one side of the electrode tab root that passes through the bottom opening of the receiving groove, which serves as a limit to prevent the electrode tab root from being squeezed and broken. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0021] Figure 1 An exploded view of a battery provided in an embodiment of this application;
[0022] Figure 2 An exploded view of the pole core and pole core support provided in the embodiments of this application;
[0023] Figure 3 A partial cross-sectional view of a battery provided in an embodiment of this application;
[0024] Figure 4 Another partial cross-sectional view of the battery provided in an embodiment of this application;
[0025] Figure 5 This is a schematic diagram of the structure of the pole core support provided in the embodiments of this application;
[0026] Figure 6 This is another structural schematic diagram of the pole core support provided in the embodiments of this application;
[0027] Figure 7 Another structural schematic diagram of the pole core support provided in the embodiments of this application;
[0028] Figure 8 This is another structural schematic diagram of the pole core support provided in the embodiments of this application.
[0029] Figure label:
[0030] 1-Core support, 11-Receiving groove, 12-Bottom opening, 13-Electrode tab protection protrusion, 14-Exhaust hole, 2-Core, 21-Electrode tab, 3-Shell, 4-Positive electrode top cover, 41-Electrode post, 5-Negative electrode top cover, 6-Core insulating film. Detailed Implementation
[0031] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.
[0032] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.
[0033] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0034] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated 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.
[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0036] The following reference Figures 1 to 8 This application describes a core support and battery according to some embodiments.
[0037] Example 1
[0038] See Figures 1 to 8 As shown, an embodiment of this application provides a core support 1, which has a receiving groove 11 with a top opening and a bottom through-hole 12 at the bottom, so that the two sides of the core support 1 along its height direction are connected.
[0039] Based on the structure described above, when the electrode support 1 provided in this application is applied to a battery, preferably, the electrode support 1 is installed between the electrode core 2 and the corresponding cover plate, such as the positive electrode cover plate. The electrode support 1 is designed with a receiving groove 11 and a bottom opening 12. The electrode tab 21 of the electrode core 2 can extend into the receiving groove 11 through the bottom opening 12, and is welded to the battery terminal post 41 through the top opening of the receiving groove 11. If the electrode tab 21 is too long after being welded to the terminal post 41, it can also be compressed into the receiving groove 11 by the terminal post 41. This effectively prevents the excessively long tab 21 from contacting the battery casing 3, such as an aluminum casing, which could lead to a short circuit, thus improving the safety and reliability of the battery. Furthermore, the core support 1 can also fix the core 2, preventing it from shifting and fixing the shape of the tab 21. Under the protection and limitation of the receiving groove 11, the tab 21 can be effectively prevented from being pulled by vibration and broken. At the same time, the bottom wall of the receiving groove 11 separates the bent part of the tab 21 from the core 2, avoiding harmful connections and making it safer and more reliable.
[0040] In this embodiment, preferably, as follows: Figure 5 and Figure 8 As shown, the outer bottom wall of the receiving groove 11 forms two tab protection protrusions 13, and the two tab protection protrusions 13 are respectively disposed on both sides of the bottom passage 12 along its length direction to form a receiving space for receiving the root of the tab 21 of the electrode core 2, so as to provide anti-pressure limiting protection for the root of the tab 21 passing through the bottom passage 12 in its height direction.
[0041] As can be seen from the structure described above, the tab protection protrusion 13 is located on one side of the root of the tab 21 that passes through the bottom opening 12 of the receiving groove 11, and plays a limiting role to prevent the root of the tab 21 from being squeezed and to prevent the root of the tab 21 from breaking.
[0042] Furthermore, preferably, the tab protection protrusion 13 is a rectangular protrusion structure, that is, a cuboid block, and the top corners and edges are all set as arc structures to avoid sharp corners that may scratch the tab 21, etc.
[0043] In this embodiment, preferably, as follows: Figure 8As shown, along the height direction of the tab 21 support, the bottom surface of the tab 21 protrusion is parallel to the outer wall surface of the receiving groove 11, and the distance between the two is B, that is, B is the height of the aforementioned receiving space, wherein 0.5mm≤B≤3mm.
[0044] As can be seen from the structure described above, the accommodating space with the above-mentioned height can accommodate the roots of various tabs 21, effectively limiting them in the height direction and preventing compression of the roots of the tabs 21.
[0045] In this embodiment, preferably, as follows: Figure 7 As shown, the bottom opening is rectangular, which meets assembly requirements and facilitates processing and manufacturing. Preferably, the side edges of the rectangular opening are rounded. Of course, it is not limited to this. The bottom opening can also be other shapes such as a waist-shaped opening, depending on the actual needs.
[0046] Furthermore, preferably, the width of the bottom opening 12 is A, and 1mm≤A≤12mm, which can satisfy the passage of the tab 21.
[0047] Further, preferably, such as Figure 8 As shown, the length direction of the bottom opening 12 is the same as the length direction of the tab 21, and the length of the bottom opening 12 is L, the length of the tab 21 is W, and W+1mm≤L≤W+10mm.
[0048] As can be seen from the structure described above, the bottom opening 12, which meets the above dimensional requirements, can ensure that the tab 21 passes through smoothly, avoid interference and jamming, and achieve smooth assembly.
[0049] In this embodiment, preferably, as follows: Figure 4 As shown, the outer bottom walls of the core support 1 on both sides of the bottom opening 12 are inclined and are inclined upward toward the bottom opening 12.
[0050] As can be seen from the structure described above, the inclined surface is obtained by contouring the trajectory of the tab 21 when it is introduced into the bottom opening 12, which makes it easier for the tab 21 to extend into the bottom opening 12 and can better protect the tab 21.
[0051] Further, preferably, such as Figure 4 As shown, the inclination angle of the inclined plane is α, and 5°≤α≤30°.
[0052] In this embodiment, preferably, as follows: Figure 6 As shown, the bottom wall of the receiving groove 11 of the electrode core support 1 is also formed with a through vent hole 14, which can be used as a through hole for venting and electrolyte flow.
[0053] Furthermore, preferably, the number of exhaust holes 14 is multiple.
[0054] In this embodiment, preferably, the receiving groove 11 extends along the entire length direction of the pole core support 1, that is, the receiving groove 11 extends along the length direction of the pole core support 1.
[0055] In this embodiment, preferably, the core support 1 is made of insulating plastic, which can play an insulating and protective role, making it safer and more reliable.
[0056] Furthermore, preferably, the material of the electrode core support 1 is PP (polypropylene) or PET (polyethylene terephthalate). Of course, it is not limited to these, and the material of the electrode core support 1 can also be other electrolyte-resistant insulating plastic materials.
[0057] Example 2
[0058] like Figure 1 As shown, Embodiment 2 of this application also provides a battery, including the electrode core support 1 described in Embodiment 1 above. Therefore, it has all the beneficial technical effects of the electrode core support 1. The same technical features and beneficial effects will not be repeated here.
[0059] In this embodiment, preferably, as follows: Figures 1 to 4 As shown, the battery also includes a core 2, a casing 3, a positive electrode top cover 4, a negative electrode top cover 5, and a core insulating film 6; wherein, the core 2 is installed inside the casing 3; both ends of the casing 3 along its height direction are formed with openings, and the openings at both ends are welded and sealed to the positive electrode top cover 4 and the negative electrode top cover 5 respectively.
[0060] The electrode core insulating film 6 wraps around the electrode core 2 and is disposed between the electrode core 2 and the housing 3; the electrode core support 1 is installed between the positive electrode top cover 4 and the positive end of the electrode core 2, and abuts against the positive electrode top cover 4 and the positive end of the electrode core 2 respectively; the positive electrode tab 21 of the electrode core 2 extends through the bottom opening 12 of the electrode core support 1 to the receiving groove 11 of the electrode core support 1.
[0061] As can be seen from the structure described above, the electrode support 1 is designed with a receiving groove 11 and a bottom opening 12. The tab 21 of the electrode 2 can extend into the receiving groove 11 through the bottom opening 12. If the tab 21 is too long after it is welded to the terminal post 41, it can also be compressed into the receiving groove 11 by the terminal post 41. This can effectively prevent the excessively long tab 21 from contacting the battery casing 3, such as an aluminum casing, and causing a short circuit, thus improving the safety and reliability of the battery. Moreover, the electrode support 1 can also fix the electrode 2, preventing the electrode 2 from moving around, and fix the shape of the tab 21. Under the protection and limitation of the receiving groove 11, the tab 21 can effectively prevent the problem of breakage caused by the pulling of vibration on the tab 21. At the same time, the bottom wall of the receiving groove 11 separates the bent part of the tab 21 from the electrode 2, avoiding harmful connections, making it safer and more reliable.
[0062] Furthermore, the tab protection protrusion 13 is located on one side of the base of the tab 21 that passes through the bottom opening 12 of the receiving groove 11, which serves as a limit to prevent the base of the tab 21 from being squeezed and to prevent the base of the tab 21 from breaking.
[0063] It is evident that the battery provided in this application is less prone to short circuits and breakage at the base of tab 21, making it safer and more reliable.
[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A pole core support component, characterized in that, The pole core support has a receiving groove with a top opening and a bottom passage at the bottom of the receiving groove, so that the two sides of the pole core support along its height direction are connected.
2. The pole core support member according to claim 1, characterized in that, The outer bottom wall of the receiving groove forms two tab protection protrusions, and the two tab protection protrusions are respectively arranged on both sides of the bottom opening along its length direction to form a receiving space for receiving the root of the tab of the electrode core, so as to provide anti-pressure limiting protection for the root of the tab passing through the bottom opening in its height direction.
3. The pole core support member according to claim 2, characterized in that, Along the height direction of the electrode support, the bottom surface of the electrode protrusion is parallel to the outer wall surface of the receiving groove, and the distance between them is B, wherein 0.5mm≤B≤3mm.
4. The pole core support member according to claim 2, characterized in that, The bottom opening is rectangular.
5. The pole core support member according to claim 4, characterized in that, The width of the bottom opening is A, and 1mm≤A≤12mm.
6. The pole core support member according to claim 4, characterized in that, The length direction of the bottom opening is the same as the length direction of the electrode tab, and the length of the bottom opening is L, the length of the electrode tab is W, and W+1mm≤L≤W+10mm.
7. The pole core support member according to claim 1, characterized in that, The outer bottom walls of the core support member located on both sides of the bottom opening are sloped and inclined upward toward the bottom opening.
8. The pole core support member according to claim 7, characterized in that, The inclination angle of the inclined plane is α, and 5°≤α≤30°.
9. The pole core support member according to any one of claims 1 to 8, characterized in that, The pole core support is made of insulating plastic; and / or The bottom wall of the receiving groove of the pole core support is also formed with a through vent hole.
10. A battery, characterized in that, The device includes an electrode core, a housing, a positive electrode top cover, a negative electrode top cover, an electrode core insulating film, and an electrode core support member as described in any one of claims 1 to 9; wherein the electrode core is installed inside the housing; the housing has openings at both ends along its height direction, and the openings at both ends are welded and sealed to the positive electrode top cover and the negative electrode top cover, respectively; The electrode core insulating film wraps around the electrode core and is disposed between the electrode core and the housing; the electrode core support is installed between the positive electrode top cover and the positive end of the electrode core, and abuts against the positive electrode top cover and the positive end of the electrode core respectively; the positive electrode tab of the electrode core extends through the bottom opening of the electrode core support into the receiving groove of the electrode core support.