Harmonica-shaped tube assembly and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a harmonica-shaped tube assembly and a battery pack, the harmonica-shaped tube assembly comprises a harmonica-shaped tube, a joint and a connecting piece, the connecting piece is formed through injection molding and is embedded and fixed at one end of the harmonica-shaped tube, and the connecting piece and the joint are connected through a sleeved interference structure. The connecting piece and the connector are fixed at the sleeved position through an annular melting layer, and at least the connecting piece is provided with a melting excess material containing position used for containing part of melting materials of the annular melting layer. According to the utility model, the connecting piece and the joint are connected through the sleeving interference structure, so that the joint is clamped, laser welding is facilitated, and the welding reject ratio is reduced. In addition, the connector and the connecting piece are fixed through the annular melting layer, the molten excess material containing position is at least arranged on the connecting piece, the molten excess material containing position is filled with the separated-out molten material, the contact area of the annular melting layer and the connecting piece is further enlarged, and the connection strength and stability of the harmonica-shaped tube assembly are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, specifically, mouth organ pipe subassembly and battery pack. BACKGROUND

[0002] Mouth organ pipe is the core component of battery pack heat management system, it is similar to mouth organ reed piece, it is composed of multiple parallel arranged flat flow channel, is used for realizing battery high -efficient heat dissipation.

[0003] However, when mouth organ pipe is connected with joint, generally adopts the mode of laser welding, the high temperature of laser welding can make the partial material of joint melt and form the connection with connecting piece, and the melted material that separates out can be attached on the surface of joint, influence welding effect and aesthetic appearance. UTILITY MODEL CONTENT

[0004] In view of this, a kind of mouth organ pipe subassembly and battery pack of the utility model, to solve the above technical problems.

[0005] One aspect, the utility model provides a kind of mouth organ pipe subassembly, including mouth organ pipe, joint and connecting piece, the connecting piece is embedded in one end of the mouth organ pipe by injection molding, the connecting piece and the joint are connected by sleeve joint interference structure, and the connecting piece and the joint are fixed at sleeve joint place by annular melt layer, at least on the connecting piece there is melt residual material for accommodating annular melt layer's melt residual material accommodating site.

[0006] In some embodiments of the present application, the melt residual material accommodating site includes any one or combination of two of chamfer and groove.

[0007] In some embodiments of the present application, the sleeve joint interference structure includes annular extension portion arranged on the joint, and annular groove body is arranged on the connecting piece for the annular extension portion insertion and interference fit with the annular extension portion.

[0008] In some embodiments of the present application, the outer wall of the annular extension portion and the first groove wall of the annular groove body are welded to form the annular melt layer.

[0009] In some embodiments of the present application, the length of the annular extension portion is greater than the groove depth of the annular groove body.

[0010] In some embodiments of the present application, the melt residual material accommodating site is arranged on the second groove wall of the annular groove body.

[0011] In some embodiments of the present application, a molten excess material accommodating site two is arranged at the free end of the annular extension, and the molten excess material accommodating site two comprises any one or a combination of both of a chamfer and a groove.

[0012] In some embodiments of the present application, the axial length of the annular molten layer is shorter than the axial length of the annular extension.

[0013] In some embodiments of the present application, the material of the harmonica tube and the connector is light-absorbing material, and the material of the connecting piece is light-transmitting material.

[0014] Compared with the prior art, the beneficial effects of the present application are as follows: the connecting piece and the connector are connected through the interference fit structure, the contact force is strengthened due to the interference fit between the connecting piece and the connector, that is, the connector is clamped, which is convenient for laser welding and reduces the welding failure rate. In addition, the connector and the connecting piece are fixed by the annular molten layer, and a molten excess material accommodating site is arranged on at least the connecting piece, so that the molten material separated out during laser welding is prevented from adhering to the surface of the connector or the connecting piece, which affects the appearance. At the same time, the separated out molten material fills the molten excess material accommodating site, further expands the contact area of the annular molten layer and the connecting piece, and improves the connection strength and stability of the harmonica tube assembly.

[0015] In another aspect, the present application provides a battery pack comprising the above harmonica tube assembly.

[0016] It can be understood that the battery pack provided by the present application has the same beneficial effects as the above harmonica tube assembly, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments, and are not meant to limit the present application. Moreover, the same reference numerals in the attached drawings indicate the same or similar components. In the drawings:

[0018] Figure 1 A perspective view of the harmonica tube assembly according to an embodiment of the present application is shown in FIG. 1.

[0019] Figure 2 A top view of the harmonica tube assembly according to an embodiment of the present application is shown in FIG. 2.

[0020] Figure 3 A perspective view of the harmonica tube assembly according to an embodiment of the present application is shown in FIG. 1. Figure 3 A partial cross-sectional view in the A-A direction of the harmonica tube assembly according to an embodiment of the present application is shown in FIG. 3.

[0021] Figure 4The utility model provides a three-dimensional structure schematic diagram of connecting piece provides for the embodiment of the utility model.

[0022] Figure 5 The utility model provides a three-dimensional structure schematic diagram of joint provides for the embodiment of the utility model.

[0023] In the drawing: 1, mouth organ pipe;2, joint;21, annular melting layer;22, annular extension;3, connecting piece;31, residual material of melting accommodating position;32, annular groove body;33, first groove wall;34 second groove wall. DETAILED DESCRIPTION

[0024] The utility model will be further described in detail in combination with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0025] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] The terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0027] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In combination Figures 1-5As shown, in one aspect, the present embodiment provides a harmonica tube assembly, which comprises a harmonica tube 1, a joint 2 and a connecting piece 3. The connecting piece 3 is integrally formed with one end of the harmonica tube 1 by injection molding and is embedded in the harmonica tube 1. The connecting piece 3 and the joint 2 are connected by a sleeving interference structure, and the connecting piece 3 and the joint 2 are fixed at the sleeving position by an annular molten layer 21. At least a molten residue accommodating position 31 for accommodating the molten material of the annular molten layer 21 is arranged on the connecting piece 3.

[0029] It can be understood that in the present embodiment, one end of the harmonica tube 1 is integrally connected with the connecting piece 3, and the connecting piece 3 and the joint 2 are connected by a sleeving interference structure. The interference connection structure makes the connecting piece 3 and the joint 2 interference fit, strengthens the contact force, that is, the interference connection structure plays a clamping effect on the joint 2, facilitates laser welding, and reduces the welding failure rate. In addition, the joint 2 and the connecting piece 3 are fixed by the annular molten layer 21, and the molten residue accommodating position 31 is arranged on at least the connecting piece 3, which avoids the molten material separated out from the annular molten layer 21 during laser welding from adhering to the surface of the joint 2 or the connecting piece 3, affecting the appearance. At the same time, the separated molten material fills the molten residue accommodating position 31, further expanding the contact area between the annular molten layer 21 and the connecting piece 3, and improving the connection strength.

[0030] In one specific embodiment of the present application, the molten residue accommodating position 31 includes any one or a combination of both of a chamfer and a groove.

[0031] It can be understood that the specific structure of the molten residue accommodating position 31 in the present embodiment can be selected according to actual conditions, and the present embodiment does not make specific limitations thereon.

[0032] In one specific embodiment of the present application, the sleeving interference structure includes an annular extension 22 arranged on the joint 2, and an annular groove body 32 arranged on the connecting piece 3 for inserting the annular extension 22 and interference fitting with the annular extension 22.

[0033] It can be understood that in the present embodiment, the joint 2 and the connecting piece 3 are connected by inserting the annular extension 22 into the annular groove body 32, and the annular groove body 32 and the connecting piece 3 are interference fit. Through the interference fit structure, the annular groove body 32 plays a clamping effect on the annular extension 22 of the joint 2, and further strengthens the contact force between the annular groove body 32 and the annular extension 22, facilitating laser welding and reducing the welding failure rate.

[0034] It can be understood that in the present embodiment, the concave structure of the connecting piece 3 can play a clamping effect on the joint 2, facilitate welding, and also play a supporting effect on the joint 2 to prevent it from deforming.

[0035] In an embodiment of the present application, the outer wall of the annular extension 22 and the first groove wall 33 of the annular groove 32 are welded to form the annular fusion layer 21.

[0036] Specifically, when the annular extension 22 of the connector 2 is inserted into the annular groove 32 of the connecting piece 3, laser welding is performed on the first groove wall 33 of the connecting piece 3 as the laser welding area, so that the annular fusion layer 21 is formed between the annular extension 22 and the first groove wall 33.

[0037] In an embodiment of the present application, the length of the annular extension 22 is greater than the groove depth of the annular groove 32.

[0038] Specifically, in the embodiment, the length of the annular extension 22 is greater than the groove depth of the annular groove 32, so that when laser welding is not performed, the annular extension 22 is not completely inserted into the annular groove 32, and when laser welding is performed, at least part of the material of the annular extension 22 begins to melt and separate under the action of high temperature, and the melted and separated material fills into the molten residue accommodating position 31, at this time, the annular extension 22 is completely inserted into the annular groove 32.

[0039] In an embodiment of the present application, the molten residue accommodating position 31 is arranged on the second groove wall 34 of the annular groove 32.

[0040] Specifically, in the embodiment, the molten residue accommodating position 31 is arranged on the second groove wall 34 of the annular groove 32, and the second groove wall 34 of the annular groove 32 is located on the side close to the mouthpiece 1, that is, the molten residue accommodating position 31 on the second groove wall 34 is located on the inner side after the connector 2 is connected to the connecting piece 3, thereby providing a space for accommodating the molten residue and avoiding the molten residue from being attached to the surface of the connector 2 or the connecting piece 3.

[0041] In an embodiment of the present application, the free end of the annular extension 22 is provided with two molten residue accommodating positions 31, and the molten residue accommodating position 31 includes any one or a combination of the chamfer and the groove.

[0042] Specifically, in the embodiment, the free end of the annular extension 22 is provided with the molten residue accommodating position 31, and since the annular extension 22 is inserted into the annular groove 32, that is, the molten residue accommodating position 31 is close to the groove bottom of the annular groove 32, when the annular extension 22 is laser welded, the molten residue is filled in the groove bottom of the annular groove 32, thereby further avoiding the molten residue from being attached to the surface of the connector 2 or the connecting piece 3.

[0043] It can be understood that the specific structure of the molten residue accommodating position 31 in the embodiment can be selected according to actual conditions, and the embodiment does not make specific limitations thereon.

[0044] In one specific embodiment of the present application, the axial length of the annular molten layer 21 is shorter than the axial length of the annular extension 22.

[0045] In one specific embodiment of the present application, the materials of the harmonica tube 1 and the joint 2 are light-absorbing materials; the material of the connecting piece 3 is light-transmitting material.

[0046] Specifically, in the present embodiment, the harmonica tube 1 and the joint 2 are light-absorbing materials, and the connecting piece 3 is light-transmitting material. When the connecting piece 3 and the joint 2 are connected by laser welding, the laser passes through the first slot wall 33 of the annular slot body 32 to melt and connect the annular extension 22 of the joint 2 and the first slot wall 33, and the annular extension 22 and the first slot wall 33 are melt-connected to form the annular molten layer 21, i.e., the annular molten layer 21 is formed on the first slot wall 33, and thus the axial length of the annular molten layer 21 is shorter than the axial length of the annular extension 22.

[0047] In another aspect, the utility model provides a kind of battery pack, including above-mentioned one kind of harmonica tube subassembly.

[0048] It can be understood that the battery pack provided by the utility model has the same beneficial effects as the above-mentioned harmonica tube subassembly, which will not be repeated here.

[0049] It can be understood by those skilled in the art that the above-mentioned is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A harmonica tube assembly comprising a harmonica tube (1), a joint (2) and a connecting piece (3) which is injection molded and embedded at one end of the harmonica tube (1), characterized in that, The connecting piece (3) and the joint (2) are connected by a sleeve joint interference structure, and the connecting piece (3) and the joint (2) are fixed at the sleeve joint by an annular fusion layer (21), and at least the connecting piece (3) is provided with a fusion excess material accommodating position (31) for accommodating part of the fusion material of the annular fusion layer (21).

2. A harmonica tube assembly according to claim 1, wherein, The fusion excess material accommodating position (31) comprises any one or a combination of both of a chamfer and a groove.

3. A harmonica tube assembly according to claim 2, wherein, The sleeve joint interference structure comprises an annular extension (22) provided on the joint (2), and an annular groove body (32) provided on the connecting piece (3) for inserting and interference fitting the annular extension (22).

4. A harmonica tube assembly according to claim 3, wherein, The outer wall of the annular extension (22) and the first groove wall (33) of the annular groove body (32) are welded to form the annular fusion layer (21).

5. A harmonica tube assembly according to claim 3, wherein, The length of the annular extension (22) is greater than the groove depth of the annular groove body (32).

6. A harmonica tube assembly according to claim 3, wherein, The fusion excess material accommodating position (31) is provided on the second groove wall (34) of the annular groove body (32).

7. A harmonica tube assembly according to claim 3, wherein The free end of the annular extension (22) is provided with a fusion excess material accommodating position (31) two, which comprises any one or a combination of both of a chamfer and a groove.

8. A harmonica tube assembly according to claim 3, wherein, The axial length of the annular fusion layer (21) is shorter than the axial length of the annular extension (22).

9. A harmonica tube assembly according to claim 1, wherein, The material of the harmonica tube (1) and the joint (2) is light-absorbing material; the material of the connecting piece (3) is light-transmitting material.

10. A battery pack, characterized by, A harmonica tube assembly comprising a connecting piece (3) and a joint (2) connected by a sleeve joint interference structure, and the connecting piece (3) and the joint (2) are fixed at the sleeve joint by an annular fusion layer (21), and at least the connecting piece (3) is provided with a fusion excess material accommodating position (31) for accommodating part of the fusion material of the annular fusion layer (21). The fusion excess material accommodating position (31) comprises any one or a combination of both of a chamfer and a groove. The sleeve joint interference structure comprises an annular extension (22) provided on the joint (2), and an annular groove body (32) provided on the connecting piece (3) for inserting and interference fitting the annular extension (22). The outer wall of the annular extension (22) and the first groove wall (33) of the annular groove body (32) are welded to form the annular fusion layer (21). The length of the annular extension (22) is greater than the groove depth of the annular groove body (32). The fusion excess material accommodating position (31) is provided on the second groove wall (34) of the annular groove body (32). The free end of the annular extension (22) is provided with a fusion excess material accommodating position (31) two, which comprises any one or a combination of both of a chamfer and a groove. The axial length of the annular fusion layer (21) is shorter than the axial length of the annular extension (22). The material of the harmonica tube (1) and the joint (2) is light-absorbing material; the material of the connecting piece (3) is light-transmitting material. A harmonica tube assembly comprising a connecting piece (3) and a joint (2) connected by a sleeve joint interference structure, and the connecting piece (3) and the joint (2) are fixed at the sleeve joint by an annular fusion layer (21), and at least the connecting piece (3) is provided with a fusion excess material accommodating position (31) for accommodating part of the fusion material of the annular fusion layer (21). The fusion excess material accommodating position (31) comprises any one or a combination of both of a chamfer and a groove.

Images