Pole assembly, battery top cover and battery
The non-welding mechanical connection method of the pole assembly solves the problems of short circuit and insulation failure during the welding process between the pole, battery cell and external equipment, and improves the safety, reliability and stability of the battery connection.
Patent Information
- Application Number
- CN202422629232.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-10-29
AI Technical Summary
In the prior art, the welding process between the electrode and the battery cell or external equipment may cause metal chips to fly and cause a short circuit in the core package, or the high temperature of welding may melt the plastic and cause insulation failure.
The pole assembly, including the pole body and insulation, is used. Non-welding mechanical connection methods such as threaded connection and riveting are used to replace traditional welding to ensure safe and reliable connection between the pole, battery cell and external equipment.
It reduces battery processing costs, improves the safety and reliability of internal and external connections of the battery, prevents short circuits and insulation failures, and enhances the stability and safety of connections.
Smart Images
Figure CN223378401U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a pole assembly, a battery top cover and a battery. Background Art
[0002] Currently, laser welding is usually used to connect the poles to the battery cells and external devices respectively.
[0003] When welding the pole to the inside of the battery cell, metal chips may fly into the core package during the welding process, causing a short circuit in the core package; when welding the outside of the battery cell, the high temperature during the welding process will melt the plastic and cause insulation failure. Utility Model Content
[0004] In view of this, the present application provides a pole assembly, a battery top cover and a battery, aiming to solve one of the technical problems in the prior art.
[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:
[0006] In a first aspect, an embodiment of the present application provides a pole assembly, comprising a pole body and an insulating member, wherein the insulating member is arranged around the circumference of the pole body, and the pole assembly has a first direction. Along the first direction, the pole assembly is provided with a first connecting portion and a second connecting portion, and the first connecting portion and the second connecting portion are both used for non-welding mechanical connection.
[0007] In one embodiment of the first aspect, the first connecting portion is a threaded hole, and the second connecting portion is a riveted hole.
[0008] In one embodiment of the first aspect, both the first connection portion and the second connection portion are rivet holes.
[0009] In one embodiment of the first aspect, the first connection portion is a rivet hole, and the second connection portion is a threaded hole.
[0010] In one embodiment of the first aspect, the first connecting portion and the second connecting portion are spaced apart along a first direction.
[0011] In one embodiment of the first aspect, the pole body includes a first surface, a second surface, and a step surface spaced apart along the first direction, the first connecting portion is provided on the first surface, the second connecting portion is provided on the second surface, the step surface is provided around the circumference of the second surface and is located on a side of the second surface close to the first surface, and along the first direction, the second surface and the step surface have a spacing L1 that satisfies the following conditions: 0.5≤L1≤5mm.
[0012] In one embodiment of the first aspect, a groove is formed on the step surface, and the groove is arranged around the second surface.
[0013] In one embodiment of the first aspect, the insulating member has a third surface and a fourth surface spaced apart along the first direction, the fourth surface does not exceed the step surface, the third surface is lower than the first surface, and in the first direction, there is a spacing L2 between the third surface and the first surface, satisfying: 0.5≤L2≤3mm.
[0014] In a second aspect, an embodiment of the present application further provides a battery top cover, comprising the pole assembly in any of the above embodiments.
[0015] In a third aspect, an embodiment of the present application further provides a battery, comprising the pole assembly in any of the above embodiments or the battery top cover in any of the above embodiments.
[0016] Compared with the prior art, the present application has the following advantages: the present application proposes a pole assembly, comprising a pole body and an insulating member, wherein the insulating member is arranged around the circumference of the pole body to form an insulating connection between the pole body and the top cover to prevent short circuit;
[0017] The pole assembly has a first direction. Along the first direction, the pole assembly is provided with a first connecting portion and a second connecting portion. The first connecting portion and the second connecting portion are both used for non-welding mechanical connection. By providing a non-welding mechanical connection to replace the existing welding, the processing cost of the battery can be reduced. It can also make the connection between the pole and the battery cell, and the pole and the external equipment in a tight contact, thereby improving the safety and reliability of the internal and external connections of the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.
[0019] Figure 1 Shows a schematic structural diagram of a pole assembly in some embodiments of the present application;
[0020] Figure 2 One of the cross-sectional schematic diagrams of the pole assembly in some embodiments of the present application is shown;
[0021] Figure 3 FIG2 shows a second cross-sectional schematic diagram of a pole assembly in some embodiments of the present application;
[0022] Figure 4The third cross-sectional schematic diagram of the pole assembly in some embodiments of the present application is shown.
[0023] Explanation of the main component symbols: 100-pole assembly; 110-pole body; 111-first connecting part; 112-second connecting part; 113-first surface; 114-second surface; 115-step surface; 1151-groove; 120-insulating part; 121-third surface; 122-fourth surface; 123-insulating block; D1-first direction. DETAILED DESCRIPTION
[0024] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.
[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.
[0027] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.
[0028] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.
[0029] As you can understand, the battery terminal is the primary pathway for the current generated by the chemical reactions within the battery to flow to the external circuit. Through the terminal, the battery can deliver power to the device using it. In addition to its electrical function, the terminal also provides mechanical support, securing the battery in place to prevent loosening or disconnection due to vibration and other factors during use.
[0030] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a pole assembly 100, which is mainly used to form an electrical connection between a battery cell and an external device.
[0031] The pole assembly 100 includes a pole body 110 and an insulating member 120 . The insulating member 120 is disposed around the pole body 110 .
[0032] It should be understood that the pole body 110 has the function of forming an electrical connection between the battery cell and external equipment. The pole body 110 is made of materials such as lead alloy, copper, and aluminum.
[0033] Typically, a battery top cover is provided with a mounting position for a pole, and the cover plate of the battery top cover is made of metal, plastic, etc. By providing an insulating member 120 around the pole body 110, an insulating connection is formed between the pole body 110 and the top cover to prevent short circuit.
[0034] The pole assembly 100 has a first direction D1 . Along the first direction D1 , the pole assembly 100 is provided with a first connecting portion 111 and a second connecting portion 112 . Both the first connecting portion 111 and the second connecting portion 112 are used for non-welding mechanical connection.
[0035] In this application, non-welded mechanical connections refer to any of threaded connections, riveted connections, expansion joints, snap connections, and mortise and tenon joints. Replacing existing welding with non-welded mechanical connections can reduce battery processing costs and provide secure connections between the battery terminal and the cell, as well as between the terminal and external equipment, thereby improving the safety and reliability of the battery's internal and external connections.
[0036] In some embodiments, as Figure 2As shown, the first connection portion 111 is a threaded hole, and the second connection portion 112 is a rivet hole. The threaded hole electrically connects the pole body 110 to the external electrical device, and the rivet hole electrically connects the pole body 110 to the battery cell, ensuring safe and reliable internal and external connections of the battery.
[0037] In some embodiments, as Figure 3 As shown, the first connection portion 111 and the second connection portion 112 are both rivet holes. The rivet holes electrically connect the pole body 110 to external electrical equipment and also to the battery cell, ensuring safe and reliable internal and external connections of the battery.
[0038] In some embodiments, as Figure 4 As shown, the first connection portion 111 is a rivet hole, and the second connection portion 112 is a threaded hole. The threaded hole electrically connects the pole body 110 to the battery cell, and the rivet hole electrically connects the pole body 110 to the external electrical device, ensuring safe and reliable internal and external connections of the battery.
[0039] In some embodiments, the first connection portion 111 and the second connection portion 112 are spaced apart along the first direction D1 so that the pole does not interfere with the installation of the battery cell or external electrical equipment, thereby preventing the battery structure from being damaged.
[0040] In some embodiments, the pole body 110 includes a first surface 113 , a second surface 114 , and a step surface 115 spaced apart along the first direction D1 .
[0041] The first connection portion 111 is disposed on the first surface 113 , and the second connection portion 112 is disposed on the second surface 114 .
[0042] The stepped surface 115 is disposed around the second surface 114 and is located on the side of the second surface 114 that is closer to the first surface 113. The stepped surface 115 provides a stepped shape at one end of the terminal body 110, facilitating positioning and increasing connection strength during installation of the terminal assembly 100 and the battery top cover.
[0043] Along the first direction D1 , a distance L1 is formed between the second surface 114 and the step surface 115 , satisfying the following relationship: 0.5≤L1≤5 mm.
[0044] In this embodiment, the distance L1 between the second surface 114 and the stepped surface 115 is 2 mm. In other embodiments, the distance L1 between the second surface 114 and the stepped surface 115 is 0.5 mm, 1.0 mm, 1.5 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, and the like, not limited to these examples. When the distance L1 between the second surface 114 and the stepped surface 115 is less than 0.5 mm, the stability of the connection between the terminal assembly 100 and the battery top cover is reduced. When the distance L1 between the second surface 114 and the stepped surface 115 is greater than 5 mm, the volume of the insulating member 120 is too small, thereby reducing the insulation reliability between the terminal body 110 and the battery top cover, and between the battery top cover and external electrical equipment.
[0045] In some embodiments, a groove 1151 is defined on the step surface 115 , and the groove 1151 is disposed around the second surface 114 .
[0046] The depression is ring-shaped.
[0047] The groove 1151 is filled with glue to make the connection between the pole assembly 100 and the battery top cover more secure and prevent the pole assembly 100 from twisting relative to the battery top cover.
[0048] In some embodiments, the insulating member 120 has a third surface 121 and a fourth surface 122 spaced apart along the first direction D1 .
[0049] The fourth surface 122 does not exceed the step surface 115 , so that the groove 1151 of the pole body 110 can be connected to the battery top cover, thereby preventing the pole assembly 100 from twisting.
[0050] Third surface 121 is lower than first surface 113, forming a stepped structure between the end of pole body 110 and the end of insulating member 120. When an external electrical device is connected to pole assembly 100, the external electrical device can be separated from the battery cover, preventing the external electrical device from contacting the battery cover and preventing a short circuit.
[0051] In the first direction D1 , a distance L2 is provided between the third surface 121 and the first surface 113 , satisfying the following relationship: 0.5≤L2≤3 mm.
[0052] In this embodiment, the spacing L2 between the third surface 121 and the first surface 113 is 2 mm. In other embodiments, the spacing L1 between the second surface 114 and the step surface 115 is: 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, etc., not limited to the examples.
[0053] When the distance L2 between the third surface 121 and the first surface 113 is less than 0.5 mm, the stability of the connection between the pole assembly 100 and the external electrical equipment is reduced. When the distance L2 between the third surface 121 and the first surface 113 is greater than 3 mm, the volume of the insulating member 120 is too small, which reduces the insulation reliability between the pole body 110 and the battery top cover, and the battery top cover and the external electrical equipment.
[0054] like Figures 2 to 4 As shown, the insulating member 120 includes at least one insulating block 123 .
[0055] When there is only one insulating block 123, the insulating block 123 is hollow cylindrical, and the pole body 110 is sleeved in the insulating block 123. The pole body 110 and the insulating block 123 are snap-fitted or threadedly connected. This improves the reliability of the insulating member 120 and enhances the safety of the battery.
[0056] When there are multiple insulating blocks 123, each of the insulating blocks 123 is in the shape of an arc wall, and the insulating blocks 123 are spaced apart along the circumference of the pole body 110. The insulating blocks 123 are fixed to the pole body 110 by bonding or clamping. In this way, the manufacturing cost of the insulating member 120 can be reduced.
[0057] The embodiment of the present application further provides a battery top cover, including the pole assembly 100 in any of the above embodiments, and having all the beneficial effects of the pole assembly 100 in any of the above embodiments, which will not be described in detail here.
[0058] An embodiment of the present application further provides a battery, comprising the electrode assembly 100 in any of the above embodiments or the battery top cover in any of the above embodiments.
[0059] Batteries refer to cylindrical batteries, soft-pack batteries or square-shell batteries.
[0060] External electrical equipment refers to the components that enable multiple batteries to form a battery module or battery pack.
[0061] External electrical equipment also refers to vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, among others. Spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, among others; and electric tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, among others. The embodiments of this application do not impose any special restrictions on the above-mentioned electrical equipment.
[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.
[0063] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A pole assembly, characterized in that: It includes a pole body and an insulating member, the insulating member is arranged around the circumference of the pole body, the pole assembly has a first direction, along the first direction, the pole assembly is provided with a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are both used for non-welding mechanical connection.
2. The pole assembly according to claim 1, characterized in that The first connection portion is a threaded hole, and the second connection portion is a riveted hole.
3. The pole assembly according to claim 1, characterized in that The first connection portion and the second connection portion are both rivet holes.
4. The pole assembly according to claim 1, characterized in that The first connection portion is a riveted hole, and the second connection portion is a threaded hole.
5. The pole assembly according to claim 1, characterized in that The first connection portion and the second connection portion are spaced apart along a first direction.
6. The pole assembly according to any one of claims 1 to 5, characterized in that: The pole body includes a first surface, a second surface, and a step surface arranged at intervals along the first direction, the first connecting portion is provided on the first surface, the second connecting portion is provided on the second surface, the step surface is arranged around the circumference of the second surface and is located on the side of the second surface close to the first surface. Along the first direction, the second surface and the step surface have a spacing L1, satisfying the following: 0.5≤L1≤5mm.
7. The pole assembly according to claim 6, characterized in that A groove is formed on the step surface, and the groove is arranged around the second surface.
8. The pole assembly according to claim 6, characterized in that: The insulating member has a third surface and a fourth surface spaced apart along the first direction, the fourth surface does not exceed the step surface, the third surface is lower than the first surface, and in the first direction, there is a spacing L2 between the third surface and the first surface, satisfying: 0.5≤L2≤3mm.
9. A battery top cover, characterized in that: The invention comprises the pole assembly according to any one of claims 1 to 8.
10. A battery, characterized in that: The battery comprises the electrode assembly according to any one of claims 1 to 8 or the battery top cover according to claim 9.