Central tube assembly, cylindrical battery and electric equipment

Abstract

The utility model provides a central tube assembly, cylindrical battery and electric equipment, the central tube assembly comprises a central tube and a collector plate connected to one end of the central tube, the central tube is used for being inserted in a central hole of a pole group in the cylindrical battery, and the collector plate is used for being connected with a tab of the pole group. According to the central tube assembly disclosed by the utility model, the central tube is inserted into the central hole of the pole group, so that a supporting effect can be achieved, the problem that the central hole is easy to collapse can be prevented, and the assembling efficiency of a cylindrical battery can be improved by connecting the two current collecting discs to one end of the central tube.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a central tube assembly. At the same time, the utility model also relates to a cylindrical battery provided with the central tube assembly, and an electrical device provided on the cylindrical battery. Background Art

[0002] The pole group in the cylindrical battery adopts a winding structure. During the winding process of the pole group, a center hole will be left in the middle of the pole group. This center hole will cause the large cylindrical battery to collapse during the cycle, thus affecting the stability of the battery structure. Especially for large cylindrical batteries, the problem of center hole collapse is particularly prominent. Utility Model Content

[0003] In view of this, the utility model aims to propose a central tube assembly to solve the problem that the central hole of the pole group is easy to collapse, thereby improving the stability of the cylindrical battery.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A central tube assembly comprises a central tube and a current collecting plate connected to one end of the central tube, wherein the central tube is used to be inserted into the central hole of a pole group in a cylindrical battery, and the current collecting plate is used to be connected to the pole lug of the pole group.

[0006] Furthermore, the collecting plate is coaxially arranged with the central tube, and a liquid guide hole is provided on the collecting plate; and / or the collecting plate is connected to the central tube by welding.

[0007] Furthermore, a plurality of the liquid guide holes are arranged at intervals along the circumference of the current collecting plate.

[0008] Furthermore, the current collecting plate is provided with a plurality of welding areas spaced apart along the circumference of the current collecting plate;

[0009] The current collecting plate and the pole lug are connected by welding at a plurality of welding areas.

[0010] Furthermore, the collecting plate is provided with a positioning portion that can be connected to the central tube by insertion, and the collecting plate is positioned on the central tube through the positioning portion.

[0011] Furthermore, the positioning portion includes a positioning protrusion or a positioning groove provided on the collecting plate.

[0012] Furthermore, the collecting plate is made of copper-nickel-plated material, or the collecting plate is made of aluminum.

[0013] Furthermore, the central tube is made of high temperature resistant plastic material; and / or the wall thickness d of the central tube satisfies: 0.5mm≤d≤1mm.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The center tube assembly described in the utility model can play a supporting role by inserting the center tube into the center hole of the pole group, thereby preventing the center hole from collapsing easily, and is connected to one end of the center tube by two collecting plates, which is conducive to improving the assembly efficiency of the cylindrical battery.

[0016] In addition, by setting the liquid guide holes on the current collecting plate, it is convenient for the electrolyte to pass through, thereby improving the infiltration effect of the electrode group; the current collecting plate is welded to the central tube, which is conducive to improving the connection strength between the two. Setting multiple liquid guide holes on the current collecting plate is conducive to improving the efficiency of electrolyte passing through, and is easy to arrange and implement. The welding of the current collecting plate and the pole ear is achieved by the welding area arranged at intervals along the circumference of the current collecting plate, which is conducive to improving the electrical connection effect between the pole ear and the current collecting plate.

[0017] In addition, the current collecting plate is positioned on the center tube through the positioning part, which is conducive to improving the connection efficiency between the current collecting plate and the center tube, as well as the installation accuracy. The positioning protrusion and the positioning groove have a simple structure, and the positioning effect with the center tube is good. The current collecting plate is made of copper-plated nickel material, which is conducive to connecting with the negative ear, and the current collecting plate is made of aluminum material, which is conducive to connecting with the positive ear, and both have good electrical connection effects. The center tube is made of high-temperature resistant plastic material, which is conducive to extending the service life and safety of the center tube; the setting of the center tube wall thickness range is conducive to reducing weight while ensuring the support effect of the center hole, thereby reducing production costs.

[0018] In addition, another object of the present invention is to provide a cylindrical battery, comprising a pole group with a central hole formed therein, and pole ears are respectively provided at both ends of the pole group.

[0019] It also includes the central tube assembly as described above, wherein the central tube is inserted into the central hole, and the current collecting plate is connected to the pole lug at the same end.

[0020] The cylindrical battery of the utility model is advantageous for improving the performance and safety of the cylindrical battery by providing the central tube assembly as described above.

[0021] In addition, the utility model also provides an electrical device, comprising the cylindrical battery as described above.

[0022] The electrical equipment described in the present invention has the same beneficial effects as the cylindrical battery described above, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0024] Figure 1 This is a structural schematic diagram of the central tube assembly according to the first embodiment of the present utility model;

[0025] Figure 2 for Figure 1 Bottom view of

[0026] Figure 3 for Figure 2 AA direction section view in.

[0027] Description of reference numerals:

[0028] 1. Collecting plate; 2. Center tube;

[0029] 101. Liquid guide hole; 102. Welding area; 103. Positioning protrusion. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0031] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0033] Embodiment 1

[0034] The present embodiment relates to a central tube assembly. In terms of overall structure, the central tube assembly includes a central tube 2 and a current collecting plate 1 connected to one end of the central tube 2. The central tube 2 is used to be inserted into the central hole of the pole group in the cylindrical battery, and the current collecting plate 1 is used to be connected to the pole ear of the pole group.

[0035] The center tube assembly of this embodiment can play a supporting role by inserting the center tube 2 into the center hole of the electrode group, thereby preventing the center hole from collapsing easily. The two collecting plates 1 are connected to one end of the center tube 2, which helps to improve the assembly efficiency of the cylindrical battery.

[0036] Based on the above overall introduction, in this embodiment, an exemplary structure of the central tube assembly is as follows Figures 1 to 3 As shown in . To ensure the supporting effect of the center tube 2 on the center hole of the pole, the outer diameter D1 of the center tube 2 and the diameter D2 of the center hole satisfy D1≤D2, so as to facilitate the insertion of the center tube 2 in the center hole and have a good supporting effect. The collecting plate 1 and the center tube 2 are coaxially arranged. Here, the collecting plate 1 and the center tube 2 are coaxially arranged, which is conducive to the connection between the two and has a good use effect.

[0037] In this embodiment, as a preferred connection method, the current collecting plate 1 is welded to the central tube 2, which is not only conducive to improving the connection strength between the two, but also easy to implement. The current collecting plate 1 is welded to one end of the central tube 2, so that the two can be integrated together, so that the two can be distributed together. Compared with the solution of arranging the current collecting plate 1 and the central tube 2 separately, the solution of integrating the current collecting plate 1 on the central tube 2 is conducive to improving the assembly efficiency of the cylindrical battery.

[0038] In specific implementation, the collecting plate 1 is provided with a positioning portion that can be plugged and connected with the central tube 2, and the collecting plate 1 is positioned on the central tube 2 through the positioning portion. Here, the collecting plate 1 is positioned on the central tube 2 through the positioning portion, which is conducive to improving the connection efficiency between the collecting plate 1 and the central tube 2, as well as the installation accuracy.

[0039] Preferably, the positioning portion in this embodiment may include a positioning protrusion 103 or a positioning groove provided on the collecting plate 1. Figure 3 As shown in the figure, the positioning part adopts a positioning protrusion 103 inserted in the center tube 2. At this time, the end of the center tube 2 connected to the current collecting plate 1 is welded and connected to the current collecting plate 1. Of course, when the positioning part in this embodiment adopts a positioning groove, the end of the center tube 2 is inserted in the positioning groove to position the current collecting plate 1 on the center tube 2. At this time, the positioning protrusion 103 and the center tube 2 are welded and connected. The structure of the combination of the positioning protrusion 103 and the positioning groove in this embodiment is simple, easy to process and shape, and has a good positioning effect.

[0040] The collector plate 1 in this embodiment is made of copper-plated nickel material. At this time, the collector plate 1 is connected to the negative pole ear and has a good electrical connection effect. In addition, the collector plate 1 can also be made of aluminum. At this time, the collector plate 1 is connected to the positive pole ear and has a good electrical connection effect. In specific implementation, the material of the collector plate 1 is selected according to the polarity of the pole ear.

[0041] As a preferred embodiment, the central tube 2 in the embodiment is made of high temperature resistant plastic material, which is conducive to extending the service life and safety of the central tube 2. For example, the central tube 2 is made of polyethylene or polypropylene, which is conducive to the processing and molding of the central tube 2.

[0042] In addition, the wall thickness d of the central tube 2 satisfies: 0.5 mm ≤ d ≤ 1 mm. For example, the wall thickness d of the central tube 2 may be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm. The setting of the range of the wall thickness d of the central tube 2 here is conducive to reducing the weight while ensuring the effect of supporting the central hole, thereby reducing the production cost.

[0043] In order to further improve the use effect of the current collecting plate 1, a liquid guide hole 101 is provided on the current collecting plate 1. By providing the liquid guide hole 101 on the current collecting plate 1, it is convenient for the electrolyte to pass through, thereby improving the infiltration effect of the electrode group. Further, a plurality of liquid guide holes 101 are arranged at intervals along the circumference of the current collecting plate 1. The cooperation of the plurality of liquid guide holes 101 is conducive to improving the passing efficiency of the electrolyte.

[0044] The collector plate 1 in this embodiment abuts against the pole lug and is welded to the pole lug. Figure 2 As shown in , the current collecting plate 1 is provided with a plurality of welding areas 102 arranged at intervals along the circumference of the current collecting plate 1, and the current collecting plate 1 and the pole lug are welded and connected at the plurality of welding areas 102. Among them, the plurality of welding areas 102 and the plurality of liquid guide holes 101 are arranged alternately in the circumference of the current collecting plate 1, which is conducive to improving the structural utilization rate of the current collecting plate 1. It should be noted that the liquid guide holes 101 may not be provided on the current collecting plate 1 according to the use requirements.

[0045] When the center tube assembly in this embodiment is used, the center tube 2 is first inserted into the center hole so that the current collecting plate 1 abuts against the pole ear, and then the pole ear and the current collecting plate 1 are welded, and the installation of the center tube assembly is completed.

[0046] The central tube assembly in this embodiment has a simple structure and a right end that is easy to arrange and implement. At the same time, it can prevent the occurrence of collapse and deformation problems at the central hole, and is beneficial to improving assembly efficiency and has good practicality.

[0047] Embodiment 2

[0048] This embodiment relates to a cylindrical battery, including a pole group with a central hole formed therein, and pole ears are respectively provided at both ends of the pole group. The cylindrical battery also includes the above-mentioned central tube assembly, the central tube 2 is inserted into the central hole, and the current collecting plate 1 is connected to the pole ears at the same end.

[0049] Specifically, the central tube assembly in this embodiment can be one or two. When the central tube assembly is one, the central tube 2 is inserted into the central hole, and the current collecting plate 1 thereon is welded and connected to the pole lug at the corresponding end. The other pole lug on the pole column can be connected in the manner of connecting the pole lug with the current collecting plate 1 in the prior art. Only one of the two current collecting plates 1 is provided with the liquid guide hole 101.

[0050] The cylindrical battery in this embodiment also includes a shell, and the electrode group is located in the space inside the shell. As a structural example, the current collecting plate 1 in the central tube assembly is welded to the negative electrode ear, and the outer peripheral wall of the current collecting plate 1 is connected to the shell, thereby forming the negative electrode of the cylindrical battery. The separately arranged current collecting plate 1 is connected to the positive electrode ear, and the pole arranged by extending out of the shell serves as the positive electrode of the cylindrical battery.

[0051] When the positive terminal of the cylindrical battery is filled with liquid, the collecting plate 1 connected to the positive electrode ear is provided with a liquid guide hole 101, while the collecting plate 1 on the central tube assembly does not need to be provided with a liquid guide hole 101. When the negative terminal of the cylindrical battery is filled with liquid, the collecting plate 1 on the central tube assembly needs to be provided with a liquid guide hole 101, while the collecting plate 1 connected to the positive electrode ear does not need to be provided with a liquid guide hole 101.

[0052] When two center tube assemblies are provided in the cylindrical battery, the two center tubes 2 are respectively inserted into the center hole, and the two cooperate to support the center hole, which can also meet the use requirements.

[0053] The cylindrical battery of this embodiment is provided with the central tube assembly as described above, which helps to improve the performance and safety of the cylindrical battery.

[0054] In addition, this embodiment also relates to an electrical device, including the cylindrical battery as described above.

[0055] The electrical equipment of this embodiment has the same beneficial effects as the cylindrical battery described above, which will not be described in detail here.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A central tube assembly, characterized in that: It includes a central tube and a current collecting plate connected to one end of the central tube, wherein the central tube is used to be inserted into the central hole of the pole group in the cylindrical battery, and the current collecting plate is used to be connected to the pole ear of the pole group; The current collecting disk can abut against the pole lug, and the current collecting disk is provided with a plurality of welding areas arranged at intervals along the circumference of the current collecting disk; the current collecting disk and the pole lug are welded and connected at the plurality of welding areas.

2. The central tube assembly according to claim 1, characterized in that: The collecting plate is coaxially arranged with the central tube, and a liquid guide hole is provided on the collecting plate; and / or the collecting plate is connected to the central tube by welding.

3. The central tube assembly according to claim 2, characterized in that: A plurality of the liquid guide holes are arranged at intervals along the circumference of the current collecting plate.

4. The central tube assembly according to claim 1, characterized in that: The collecting plate is provided with a positioning portion which can be connected with the central tube by insertion, and the collecting plate is positioned on the central tube by the positioning portion.

5. The central tube assembly according to claim 4, characterized in that: The positioning portion includes a positioning protrusion or a positioning groove arranged on the current collecting plate.

6. The central tube assembly according to claim 1, characterized in that: The current collecting plate is made of nickel-plated copper, or the current collecting plate is made of aluminum.

7. The central tube assembly according to any one of claims 1 to 6, characterized in that: The central tube is made of high temperature resistant plastic material; and / or the wall thickness d of the central tube satisfies: 0.5mm≤d≤1mm.

8. A cylindrical battery, characterized in that: The invention comprises a pole group with a central hole formed inside, and pole ears are respectively provided at both ends of the pole group. It also comprises the central tube assembly according to any one of claims 1 to 7, wherein the central tube is inserted into the central hole, and the collecting plate is connected to the pole lug at the same end.

9. An electrical equipment, characterized in that: Includes the cylindrical battery as described in claim 8.

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