Cylindrical battery cell hole ironing needle

Abstract

The utility model is suitable for the technical field of battery processing, and provides a cylindrical battery cell hole ironing needle, which comprises a conical surface hole ironing end, a conical surface hole ironing end and a cylindrical battery cell hole ironing end, the guide heating end is connected with the conical surface hole burning end, the diameter of the guide heating end is the same as the maximum diameter of the conical surface hole burning end, and the diameter of the cylindrical battery cell anode hole is smaller than that of the guide heating end. According to the utility model, the conical-surface hole ironing end is arranged as the hole ironing end, the conical-surface hole ironing end is of a large-taper-surface structure, the conical-surface hole ironing end is inserted from a cylindrical battery cell positive electrode hole, the insertion depth is adjusted according to the size of a battery cell center hole, so that the conical surface of the hole ironing needle is in contact with a cylindrical battery cell positive electrode side hole and is expanded to be round, and the hole ironing needle is withdrawn after hole ironing is completed; the conical surface of the hole ironing needle can be inserted into the same size as an inner hole of a cylindrical battery cell, and the side hole of the positive electrode of the battery cell after hole ironing is rounder; the hole ironing needle can be suitable for various types of cylindrical battery cells as long as the diameter of the central hole of the battery cell is smaller than that of the guide heating end.

Description

Technical Field

[0001] This utility model belongs to the field of battery processing technology, and in particular relates to a hot-drilling needle for cylindrical battery cells. Background Technology

[0002] A battery cell refers to a single electrochemical cell containing positive and negative electrodes. It is generally not used directly but is the energy storage part of a rechargeable battery. The quality of the battery cell directly determines the quality of the rechargeable battery. During the battery processing, cylindrical battery cells need to be perforated. The purpose of perforation is to perforate the center hole in the middle of the cylindrical battery cell to facilitate the insertion of the bottom welding pin in the next process. The bottom welding pin is inserted from the positive electrode side.

[0003] The conventional hot-drilling needle structure generally uses a cylindrical needle smaller than the center hole of a cylindrical battery cell, which is inserted into the center hole of the battery cell to make the center hole round. However, this requires a specific size of cylindrical battery cell center hole to be equipped with a hot-drilling needle. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a cylindrical battery cell hot-drilling needle, which aims to solve the problems mentioned in the background art.

[0005] This utility model embodiment is implemented as follows: a cylindrical battery cell hot-drilling needle, comprising:

[0006] The conical hot-hole end has a large taper surface structure and is used for insertion into the positive electrode hole of the cylindrical battery cell.

[0007] The guide heating end is connected to the conical hot hole end. The diameter of the guide heating end is the same as the maximum diameter of the conical hot hole end, and the diameter of the positive electrode hole of the cylindrical cell is smaller than the diameter of the guide heating end.

[0008] Preferably, the hot-hole needle further includes a fixed end, which is connected to the guide heating end.

[0009] Preferably, the fixed end, the guide heating end, and the conical hot hole end are an integral structure.

[0010] Preferably, the guiding heating end and the conical hot hole end are integrally connected, and the fixed end and the guiding heating end are detachably connected.

[0011] This utility model provides a cylindrical battery cell hot-drilling needle that addresses the problem in existing technologies where the diameter of the hot-drilling needle must be smaller than the center hole, and a different hot-drilling needle is required for each specification of cylindrical battery cell. The needle is improved by featuring a conical hot-drilling end with a large taper. During operation, the conical hot-drilling end is inserted into the positive electrode hole of the cylindrical battery cell. The insertion depth is adjusted according to the size of the center hole of the battery cell, ensuring that the conical surface of the hot-drilling needle contacts and rounds the positive electrode side hole of the cylindrical battery cell. After hot-drilling, the needle is withdrawn. This hot-drilling needle can be inserted to the same size as the inner hole of the cylindrical battery cell, resulting in a more rounded positive electrode side hole after hot-drilling. Furthermore, this hot-drilling needle is applicable to various models of cylindrical battery cells, as long as the diameter of the center hole of the battery cell is smaller than the diameter of the guiding heating end. Attached Figure Description

[0012] Figure 1 A schematic diagram of the structure of a cylindrical battery cell hot-drilling needle provided in an embodiment of this utility model;

[0013] Figure 2 This is another structural schematic diagram of a cylindrical battery cell hot-drilling needle provided for an embodiment of this utility model.

[0014] In the attached diagram: 1-fixed end; 2-guided heating end; 3-conical hot hole end. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0017] like Figures 1 to 2 The diagram shown illustrates the structure of a cylindrical battery cell hot-drilling needle according to an embodiment of this utility model, comprising:

[0018] The conical hot-hole end 3 has a large taper structure and is used for insertion from the positive electrode hole of the cylindrical battery cell.

[0019] The guide heating end 2 is connected to the conical hot hole end 3. The diameter of the guide heating end 2 is the same as the maximum diameter of the conical hot hole end 3. The diameter of the positive electrode hole of the cylindrical battery cell is smaller than the diameter of the guide heating end 2.

[0020] In one embodiment of this utility model, the cylindrical battery cell hot-drilling needle addresses the problem in the prior art that the diameter of the hot-drilling needle must be smaller than the center hole, and that a different hot-drilling needle is required for each specification of cylindrical battery cell. The needle is improved by providing a conical hot-drilling end 3, which has a large taper. During operation, the conical hot-drilling end 3 is inserted into the positive electrode hole of the cylindrical battery cell. The insertion depth is adjusted according to the size of the center hole of the battery cell, so that the conical surface of the hot-drilling needle contacts and rounds the positive electrode side hole of the cylindrical battery cell. After hot-drilling, the needle is withdrawn. The conical surface of the hot-drilling needle can be inserted to the same size as the inner hole of the cylindrical battery cell, resulting in a more rounded positive electrode side hole after hot-drilling. Furthermore, this hot-drilling needle is applicable to various models of cylindrical battery cells, as long as the diameter of the center hole of the battery cell is smaller than the diameter of the guiding heating end 2.

[0021] like Figures 1 to 2 As shown in the preferred embodiment of the present invention, the hot-hole needle further includes a fixed end 1, which is connected to the guide heating end 2.

[0022] By setting a fixed end 1, the hot-burning needle can be connected to the hot-burning device, which improves its practicality.

[0023] like Figure 1 As shown, in another preferred embodiment of this utility model, the fixed end 1, the guide heating end 2, and the conical hot hole end 3 are an integral structure.

[0024] The fixed end 1, the guide heating end 2, and the conical hot hole end 3 can be a single integrated structure, which improves strength.

[0025] like Figure 1 As shown, in a preferred embodiment of this utility model, the guide heating end 2 and the conical hot hole end 3 are integrally connected, while the fixed end 1 and the guide heating end 2 are detachably connected.

[0026] The fixed end 1 and the guide heating end 2 can also be detachably connected, making it convenient to replace the fixed end 1.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cylindrical battery cell hot-drilling needle, characterized in that, include: The conical hot-hole end (3) has a large taper surface structure and is used for insertion from the positive electrode hole of the cylindrical battery cell. The guide heating end (2) is connected to the conical hot hole end (3). The diameter of the guide heating end (2) is the same as the maximum diameter of the conical hot hole end (3). The diameter of the positive electrode hole of the cylindrical cell is smaller than the diameter of the guide heating end (2).

2. The cylindrical battery cell hot-drilling needle according to claim 1, characterized in that, The hot-hole needle also includes a fixed end (1), which is connected to the guide heating end (2).

3. The cylindrical battery cell hot-drilling needle according to claim 2, characterized in that, The fixed end (1), the guide heating end (2), and the conical hot hole end (3) are an integral structure.

4. The cylindrical battery cell hot-drilling needle according to claim 2, characterized in that, The guide heating end (2) and the conical hot hole end (3) are integrally connected, while the fixed end (1) and the guide heating end (2) are detachably connected.

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