Cylindrical battery and guide tool

Abstract

The utility model relates to the technical field of batteries, in particular to a cylindrical battery and a guide tool. During application, the central tube is inserted into the center of the cylindrical battery, the functional end of the central tube plays a role in fixing and positioning the pole, the positioning structure of the pole can position and fix the connecting piece, assembly work can be facilitated in the assembly process, the connecting piece can be prevented from shifting in the use process, and the service life of the cylindrical battery is prolonged. And therefore, the problem of deviation of the connecting sheet in the process of welding the connecting sheet with the pole is avoided. According to the guide tool, through the design of the first tip and the connecting end at the two ends of the guide positioning column, after the center pipe is connected with the connecting end of the guide tool, the center pipe is inserted into the center hole of the cylindrical battery cell through the first tip, and after the center pipe is installed, the guide tool is pulled out; the design of the first tip of the guide tool can avoid the problem that the pole roll and the diaphragm are damaged due to mutual interference between the central tube and the pole roll, the diaphragm and other structures in the cylindrical battery.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to cylindrical batteries and guide tooling. Background Art

[0002] Nowadays, the cylindrical battery project has become active in the market with the development prospects proposed by Tesla, but the existing technology is immature. Although various companies are developing cylindrical batteries, there are still many problems in the mass production process. The positioning of the connecting piece is a more stubborn problem in cylindrical batteries. In the design of the structural parts of large cylindrical batteries, considering the cost and safety performance issues, the diameter of the connecting piece is smaller than the diameter of the battery cell. Therefore, there is a center offset between the connecting piece and the pole, which may cause the pole to bend and cause inconsistent welds during the splicing welding process, which in turn leads to abnormal melting depth below the lower limit and the existence of gaps at the joints to produce cold welds. Therefore, how to optimize the positioning of the connecting piece is a technical problem that needs to be solved in this field. Utility Model Content

[0003] In view of this, the present application provides a cylindrical battery and a guide tooling that can optimize the positioning problem of the connecting piece.

[0004] In a first aspect, the present application provides a cylindrical battery, comprising: a central tube, one end of the central tube along a first direction being a functional end, the first direction being the height direction of the cylindrical battery; a pole connected to the functional end; and a connecting piece, comprising a positioning assembly, the pole comprising a positioning structure matching the positioning assembly, the connecting piece being positioned and connected to the positioning structure through the positioning assembly.

[0005] In combination with the first aspect, in a possible implementation, the pole includes a first structure, a second structure and a third structure, the second structure and the connecting plate are welded to each other, the positioning structure is arranged on the second structure, and at least part of the third structure is inserted into the center tube.

[0006] In combination with the first aspect, in a possible implementation manner, the second structure is disposed on a side of the third structure facing away from the central tube, and the first structure is disposed on a side of the second structure facing away from the central tube.

[0007] In combination with the first aspect, in a possible implementation, the connecting piece has a sleeve hole, and the sleeve hole is arranged around the outer periphery of the third structure; wherein the positioning assembly includes: a positioning member, the positioning member includes a first ring body and a second ring body, the second ring body is connected to the outer peripheral side of the first ring body, the first ring body is partially inserted in the sleeve hole, and the inner peripheral side of the first ring body is arranged around the outer periphery of the third structure, the second ring body is located between the connecting piece and the second structure, and one side of the second ring body is attached to the connecting piece; the positioning structure is a positioning recess, the positioning recess is opened on the side of the second structure facing the center tube, the positioning recess matches the second ring body, and the second ring body is at least partially embedded in the positioning recess.

[0008] In combination with the first aspect, in a possible implementation, a first clip structure is protruding on the outer wall of the third structure, and a second clip structure is provided on the inner wall of the functional end of the center tube, and the first clip structure cooperates with the second clip structure to realize the connection between the third structure and the functional end of the center tube.

[0009] In combination with the first aspect, in a possible implementation, the first clip-on structure includes a plurality of first annular protrusions arranged along the outer wall of the third structure, a gap is formed between two adjacent first annular protrusions, and the second clip-on structure includes a plurality of second annular protrusions arranged along the inner wall of the functional end, and the second annular protrusions are clipped in the gap.

[0010] In combination with the first aspect, in a possible implementation manner, a through hole penetrating along a thickness direction of the central tube is provided on the tube wall of the central tube.

[0011] In combination with the first aspect, in a possible implementation manner, the present invention further includes: a battery core including a central hole, and the central tube is inserted into the central hole.

[0012] In the second aspect, the present application provides a guiding tool, which is applied to the aforementioned cylindrical battery; wherein, the guiding tool includes: a guiding positioning column, including a first tip and a connecting end respectively located at both ends along the length direction, and the center tube also includes a docking end located on the opposite side of the functional end along the first direction, and the docking end is used to connect with the connecting end.

[0013] In combination with the second aspect, in a possible implementation, the connecting end includes an insertion section, and the insertion section is configured to be inserted into the interior of the docking end of the central tube. The guide positioning column also includes a limiting section adjacent to the insertion section, and the radial dimension of the limiting section is larger than the inner radial dimension of the central tube.

[0014] When the present application is used, the center tube is inserted into the center hole of the cylindrical battery, and the functional end of the center tube plays a role in fixing and positioning the pole. The positioning structure of the pole can position and fix the connecting piece, which can facilitate the assembly work during the assembly process, and can prevent the connecting piece from shifting during use, thereby preventing the connecting piece from offsetting during the welding process with the pole. In addition, the present application also designs a guide fixture, which connects the center tube to the connecting end of the guide fixture through the design of the first tip and the connecting end at both ends of the guide positioning column, and then inserts the center tube into the center hole of the cylindrical battery cell through the first tip. After the center tube is installed, the guide fixture is pulled out. The design of the first tip of the guide fixture can prevent the center tube from interfering with the pole roll, diaphragm and other structures in the cylindrical battery, causing the pole roll and diaphragm to be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a partial structural schematic diagram of a cylindrical battery provided in one embodiment of the present application.

[0016] Figure 2 Shown is a schematic structural diagram of a guide tooling provided in one embodiment of the present application.

[0017] Figure 3 Shown is a schematic structural diagram of a central tube provided in one embodiment of the present application. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] An exemplary cylindrical battery is as follows:

[0020] The present application provides a cylindrical battery. In one embodiment, Figure 1 and Figure 3 As shown, the cylindrical battery includes: a central tube 2, a pole 3 and a connecting piece 4. The central tube 2 includes a functional end 202 located at the end of a first direction, and the first direction is the height direction of the cylindrical battery. The pole 3 is connected to the functional end 202. The connecting piece 4 includes a positioning component, the pole 3 includes a positioning structure matching the positioning component, and the connecting piece 4 is positioned and connected to the positioning structure through the positioning component.

[0021] When this embodiment is used, the center tube 2 is inserted into the center hole of the cylindrical battery, and the functional end 202 of the center tube 2 plays a role in fixing and positioning the pole 3. The positioning structure of the pole 3 can position and fix the connecting piece 4, which can facilitate the assembly work during the assembly process and avoid the displacement of the connecting piece 4 during use, thereby avoiding the problem of offset of the connecting piece 4 during the process of welding with the pole 3.

[0022] In one embodiment, if Figure 1 and Figure 3 As shown, the pole 3 includes a first structure 301, a second structure 302 and a third structure 303, the second structure 302 and the connecting piece 4 are welded to each other, the positioning structure is arranged on the second structure 302, and at least part of the third structure 303 is inserted into the central tube 2. When the present embodiment is in use, the pole 3 is welded to the connecting piece 4 through the second structure 302, and is connected to the central tube 2 through the third structure 303, and the connecting piece 4 is positioned and fixed on the second structure 302 through the positioning structure.

[0023] Specifically, Figure 1 and Figure 3 As shown, the second structure 302 is arranged on a side of the third structure 303 facing away from the central tube 2 , and the first structure 301 is arranged on a side of the second structure 302 facing away from the central tube 2 .

[0024] Specifically, Figure 1 As shown, the connecting piece 4 has a sleeve hole 401, and the sleeve hole 401 is arranged around the outer periphery of the third structure 303. Among them, the positioning component includes a positioning member 5, and the positioning member 5 can be made of plastic. The positioning member 5 includes a first ring body 501 and a second ring body 502. The second ring body 502 is connected to the outer peripheral side of the first ring body 501. The first ring body 501 is partially inserted in the sleeve hole 401, and the inner peripheral side of the first ring body 501 is arranged around the outer periphery of the third structure 303. The second ring body 502 is located between the connecting piece 4 and the second structure 302, and one side of the second ring body 502 is attached to the connecting piece 4. The specific form of the positioning structure is a positioning recess 3021, which is opened on the side of the second structure 302 facing the central tube 2, and the positioning recess 3021 matches the second ring body 502, and the second ring body 502 is at least partially embedded in the positioning recess 3021. The first ring body 501 abuts against the inner wall of the sleeve hole 401 to position the connecting piece 4, and the second ring body 502 connected to the first ring body 501 is embedded in the positioning recess 3021, so that the positioning member 5 is positioned and fixed on the second structure 302. During the assembly process, the connecting piece 4 is sleeved on the first ring body 501, and then the outer peripheral side of the second ring body 502 and the seam of the connecting piece 4 are welded, and then the third structure 303 is inserted into the central tube 2.

[0025] In one embodiment, a first clip structure is protruding from the outer wall of the third structure 303, the functional end 202 of the central tube 2 is in the shape of a tube, and a second clip structure is provided on the inner wall of the tube body of the functional end 202. The first clip structure cooperates with the second clip structure to realize the connection between the third structure 303 and the functional end 202 of the central tube 2.

[0026] Specifically, Figure 1 As shown, the first clamping structure includes a plurality of first annular protrusions 3031 arranged along the outer wall of the third structure 303, and a gap is formed between two adjacent first annular protrusions 3031. The second clamping structure includes a plurality of second annular protrusions 203 arranged along the inner wall of the functional end 202, and the second annular protrusions 203 are clamped in the gap formed by the first annular protrusions 3031. There are a plurality of the above-mentioned gaps arranged along the height direction of the cylindrical battery, and the position of the gap into which the second annular protrusion 203 is clamped can be adjusted as needed, thereby adjusting the depth of the third structure 303 inserted into the central tube 2.

[0027] In one embodiment, if Figure 3 As shown, a through hole 204 is provided on the wall of the central tube 2 along the thickness direction of the central tube 2 to facilitate the electrolyte to flow to the electrode sheets around the central tube 2 after being injected into the central tube 2. The central tube 2 is made of plastic.

[0028] In one embodiment, if Figure 1 As shown, the cylindrical battery further includes a battery cell 10 , the battery cell 10 includes a central hole 1001 , and the central tube 2 is inserted into the central hole 1001 .

[0029] Exemplary guide fixtures are as follows:

[0030] The present application also provides a guide tool, which is applied to the aforementioned cylindrical battery. Figure 2 and Figure 3 The guide tooling includes a guide positioning column 1, which includes a first tip 101 and a connecting end 102 located at both ends along the length direction. The center tube 2 also includes a docking end 201 located on the opposite side of the functional end 202 along the first direction, and the docking end 201 is used to connect with the connecting end 102.

[0031] When in use, the connecting end 102 of the guide and positioning column 1 is inserted into the butt end 201, and the first tip 101 can facilitate the guiding, so as to conveniently guide the center tube 2 into the center hole 1001 of the battery cell 10. During the assembly process, the connecting piece 4 is first positioned and connected to the pole 3, and then the connecting piece 4 and the pole 3 are welded to each other. The guide and positioning column 1 is connected to the center tube 2, and the center tube 2 is inserted into the center hole 1001 through the guidance of the first tip 101 of the guide and positioning column 1, and finally the guide and positioning column 1 is removed for the next assembly work.

[0032] In one embodiment, the connecting end 102 includes a sleeve section 1021, which is configured to be inserted into the interior of the butt end 201 of the central tube 2. The guide and positioning column 1 also includes a limiting section 103 adjacent to the sleeve section 1021. The radial dimension of the limiting section 103 is greater than the inner radial dimension of the central tube 2. The end surface of the limiting section 103 facing the sleeve section 1021 abuts against the central tube 2, that is, only the sleeve section 1021 is sleeved into the central tube 2. In some embodiments, the end of the sleeve section 1021 away from the limiting section 103 is provided with a second tip 1022 to facilitate guiding the sleeve section 1021 into the butt end 201.

[0033] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0034] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0035] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0036] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features of this utility model.

[0037] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A cylindrical battery, characterized in that: include: A central tube (2), one end of the central tube (2) along a first direction being a functional end (202), the first direction being a height direction of the cylindrical battery; A pole (3) connected to the functional end (202); as well as The connecting piece (4) comprises a positioning assembly, the pole (3) comprises a positioning structure matching the positioning assembly, and the connecting piece (4) is positioned and connected to the positioning structure through the positioning assembly.

2. The cylindrical battery according to claim 1, characterized in that: The pole (3) comprises a first structure (301), a second structure (302) and a third structure (303); the second structure (302) and the connecting piece (4) are welded to each other, the positioning structure is arranged on the second structure (302), and at least a part of the third structure (303) is inserted into the central tube (2).

3. The cylindrical battery according to claim 2, characterized in that: The second structure (302) is arranged on a side of the third structure (303) facing away from the central tube (2), and the first structure (301) is arranged on a side of the second structure (302) facing away from the central tube (2).

4. The cylindrical battery according to claim 2, characterized in that: The connecting piece (4) has a sleeve hole (401), and the sleeve hole (401) is arranged around the outer periphery of the third structure (303); Wherein, the positioning component comprises: A positioning member (5), the positioning member (5) comprising a first ring body (501) and a second ring body (502), the second ring body (502) being connected to the outer peripheral side of the first ring body (501), the first ring body (501) being partially inserted into the sleeve hole (401), and the inner peripheral side of the first ring body (501) being arranged around the outer periphery of the third structure (303), the second ring body (502) being located between the connecting sheet (4) and the second structure (302), and one side of the second ring body (502) being in contact with the connecting sheet (4); The positioning structure is a positioning recess (3021), which is provided on a side of the second structure (302) facing the central tube (2), and the positioning recess (3021) matches the second ring body (502), and the second ring body (502) is at least partially embedded in the positioning recess (3021).

5. The cylindrical battery according to claim 2, characterized in that: A first clamping structure is protrudingly provided on the outer wall of the third structure (303), and a second clamping structure is provided on the inner wall of the functional end (202) of the central tube (2), and the first clamping structure cooperates with the second clamping structure to realize the connection between the third structure (303) and the functional end (202) of the central tube (2).

6. The cylindrical battery according to claim 5, characterized in that: The first snap-fitting structure comprises a plurality of first annular protrusions (3031) arranged along the outer wall of the third structure (303), and a gap is formed between two adjacent first annular protrusions (3031); the second snap-fitting structure comprises a plurality of second annular protrusions (203) arranged along the inner wall of the functional end (202), and the second annular protrusions (203) are snap-fitted into the gap.

7. The cylindrical battery according to claim 1, characterized in that: The wall of the central tube (2) is provided with a through hole (204) penetrating along the thickness direction of the central tube (2).

8. The cylindrical battery according to claim 1, characterized in that: Also includes: The battery core (10) comprises a central hole (1001), and the central tube (2) is inserted into the central hole (1001).

9. A guide tool, characterized in that: Applicable to a cylindrical battery as claimed in any one of claims 1 to 8; Wherein, the guide tooling comprises: The guide positioning column (1) comprises a first tip (101) and a connecting end (102) respectively located at both ends along the length direction, and the central tube (2) further comprises a butt end (201) located on the opposite side of the functional end (202) along the first direction, and the butt end (201) is used to connect with the connecting end (102).

10. The guide tool according to claim 9, characterized in that: The connecting end (102) comprises a sleeve section (1021), and the sleeve section (1021) is configured to be inserted into the interior of the butt end (201) of the central tube (2). The guiding and positioning column (1) further comprises a limiting section (103) adjacent to the sleeve section (1021), and the radial dimension of the limiting section (103) is greater than the inner radial dimension of the central tube (2).

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