Welding fixture

Abstract

The utility model relates to the technical field of battery production equipment, in particular to a welding fixture for laser welding of an output electrode connecting piece and a busbar, which comprises a base, a welding fixture body, a clamping device and a clamping device, the upper cover is arranged on the base; and the magnetic plate is arranged on the base and / or the upper cover and is used for attracting the base and the upper cover so as to clamp the connecting sheet and the busbar between the upper cover and the base, and the welding position between the clamped connecting sheet and the busbar is not shielded. The device has the advantages of being convenient to operate, high in stability, not prone to loosening, free of shielding at the welding position and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, and more specifically, to a welding fixture used for laser welding of output pole connecting piece busbars. Background Art

[0002] In the current design of battery packs, multiple battery groups are connected in series or in parallel, and the connection between the battery groups is achieved through a bus bar, which needs to be welded to the output terminal connecting piece of the battery pack.

[0003] In the existing welding process of the bus and the output pole connecting plate, the bus and the output pole connecting plate need to be fixed by fasteners to assist the subsequent welding operation. The fasteners generally include rivets or screws, etc. However, this method has some disadvantages. For example, improper connection may cause deformation of the bus and the output pole connecting plate, resulting in gaps at the connection between the bus and the output pole connecting plate, which in turn causes an increase in the resistance of the connection, ultimately affecting the performance of the battery pack. Utility Model Content

[0004] The main purpose of the utility model is to provide a welding fixture, aiming to solve the technical problems mentioned in the background technology.

[0005] In order to solve the above technical problems, the utility model proposes a welding fixture for clamping a connecting piece and a busbar, comprising:

[0006] Base;

[0007] An upper cover is arranged opposite to the base;

[0008] And a magnetic plate is arranged on the base and / or the upper cover, and is used to attract the base and the upper cover to clamp the connecting piece and the bus bar between the upper cover and the base, and the welding point between the clamped connecting piece and the bus bar is not blocked.

[0009] In the above technical solution, further, when the magnetic plate is arranged on the base or the upper cover, the base or the upper cover which is not provided with the magnetic plate is made of a material which can be attracted by the magnetic plate.

[0010] In any of the above technical solutions, further, the upper end surface of the base is matched with the bottom of the connecting piece; the bottom of the upper cover has a receiving groove for embedding the busbar, and the bottom of the upper cover is matched with the upper end surface of the connecting piece.

[0011] In any of the above technical solutions, further, the receiving groove is located in the middle position of the bottom of the upper cover.

[0012] In any of the above technical solutions, further, both the upper cover and the base are provided with windows extending therethrough, and the windows are used to expose the holes on the connecting piece and the bus bar.

[0013] In any of the above technical solutions, further, an insulating layer is provided on the base and the upper cover;

[0014] When the connecting piece and the busbar are clamped between the base and the upper cover, the insulating layer is in contact with the connecting piece and the busbar.

[0015] In any of the above technical solutions, further, it also includes an auxiliary fastener for locking the upper cover on the base.

[0016] In any of the above technical solutions, further, the side ends of the base and the upper cover are provided with mounting ear plates extending outward, mounting holes are provided on the mounting ear plates, and the auxiliary fasteners are bolts that connect the base and the ear plates through the mounting holes.

[0017] Beneficial effects: Compared with the prior art, the welding fixture provided by the present application realizes the firm clamping of the connecting plate and the busbar by means of magnetic attraction, and has the advantages of easy operation, strong stability, not easy to loosen, and no obstruction to the welding point. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the connection structure of the connecting piece and the busbar;

[0020] Figure 2 This is a schematic diagram of the structure of the clamp of the utility model clamping the connecting piece and the busbar;

[0021] Figure 3 It is a structural schematic diagram of the clamp of the utility model;

[0022] Figure 4 It is a side view structural schematic diagram of the clamp of the utility model;

[0023] Figure 5 The utility model is a schematic diagram of the structure of the clamp clamping the connecting piece and the bus bar.

[0024] The following are the descriptions of the reference numerals:

[0025] 10. Connecting piece; 20. Bus bar; 30. Hole; 100. Base; 110. Window; 120. Mounting ear plate; 200. Upper cover; 210. Receiving groove; 300. Magnetic plate; 400. Insulating layer; 500. Auxiliary fastener. DETAILED DESCRIPTION

[0026] Below, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] It should be noted that, as shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements.

[0028] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0031] The utility model proposes a welding fixture, which aims to optimize the clamping method of the battery pack connecting piece and the busbar during the laser welding process. The welding fixture realizes efficient and stable clamping of the connecting piece and the busbar by magnetic attraction, which significantly improves the convenience of welding operation and the stability of welding quality.

[0032] It should be noted that the connecting piece 10 is a component used to connect the electrode terminals on two battery cells in the battery pack, and to output the current of the electrode terminals on the battery cells at both ends of the battery pack to the outside. It is a component connected to the bus, including copper bars and aluminum bars.

[0033] The busbar 20 is a component used to connect the output pole connecting pieces of the battery pack to connect the battery packs in series or in parallel, and includes a copper busbar and an aluminum busbar.

[0034] The welding fixture of the present application is described in detail through the following embodiments.

[0035] Embodiment 1:

[0036] like Figure 1-Figure 5 As shown, in this embodiment, the welding fixture includes: a base 100; an upper cover 200, which is arranged opposite to the base 100; and a magnetic plate 300, which is arranged on the base 100 and / or the upper cover 200, and is used to attract the base 100 and the upper cover 200 to clamp the connecting piece 10 and the bus 20 between the upper cover 200 and the base 100, and the welding point between the clamped connecting piece 10 and the bus 20 is not blocked.

[0037] The magnetic plate 300 is the core component of the clamp. When the staff puts the connecting piece 10 and the bus 20 into the clamp, the magnetic plate 300 will tightly attract the base 100 and the upper cover 200 together by magnetic attraction, thereby firmly clamping the connecting piece 10 and the bus 20.

[0038] This magnetic clamping method is not only easy to operate, but also can provide a strong clamping force to ensure that the connecting piece 10 and the bus bar 20 will not loosen or shift during the welding process.

[0039] It should be noted that there are various ways to set the magnetic plate 300. On the one hand, two magnetic plates 300 can be set, and they are respectively set on the base 100 and the upper cover 200. When the staff puts the connecting plate 10 and the bus 20 between the base 100 and the upper cover 200, the two magnetic plates 300 will attract each other, thereby achieving a close fit between the base 100 and the upper cover 200, thereby ensuring that the connecting plate 10 and the bus 20 are stably clamped in the fixture.

[0040] On the other hand, the magnetic plate 300 can be provided in one piece, either on the base 100 or the upper cover 200, and the base 100 or the upper cover 200 without the magnetic plate 300 needs to be made of a material that can be attracted by the magnetic plate 300, such as metal iron. When the staff puts the connecting piece 10 and the bus bar 20 between the base 100 and the upper cover 200, the magnetic plate 300 will attract the adjacent base 100 or the upper cover 200, thereby clamping the connecting piece 10 and the bus bar 20.

[0041] Whether it is the double magnetic plate 300 setting mode or the single magnetic plate 300 setting mode, both can effectively achieve the clamping of the connecting piece 10 and the busbar 20, ensuring the stability and reliability of the welding process. At the same time, these two setting modes have their own characteristics and can be selected and optimized according to specific needs.

[0042] It should be noted that the magnetic plate 300 can be bonded to the upper cover 200 and / or the base 100 by means of structural adhesive.

[0043] It should be noted that in order to increase the contact area of ​​the base 100 and the upper cover 200 on the connecting piece 10 and the bus 20, and thus increase the suction strength, the upper end surface of the base 100 is adapted to the bottom of the connecting piece 10; the bottom of the upper cover 200 also has a receiving groove 210 for the bus 20 to be embedded, and the bottom of the upper cover 200 is adapted to the upper end surface of the connecting piece 10.

[0044] Optimally, the receiving groove 210 is located in the middle of the bottom of the upper cover 200 .

[0045] It should be noted that an insulating layer 400 is provided on the base 100 and the upper cover 200;

[0046] When the connection piece 10 and the bus bar 20 are clamped between the base 100 and the upper cover 200 , the insulating layer 400 is in contact with the connection piece 10 and the bus bar 20 .

[0047] In order to ensure the safety of the connecting piece 10 and the busbar 20 during the welding process, an insulating layer 400 is provided. The main function of the insulating layer 400 is to prevent the accidental conduction of current or voltage, thereby protecting the safety of operators and equipment.

[0048] When the connecting piece 10 and the busbar 20 are clamped between the base 100 and the upper cover 200, the insulating layer 400 will directly contact them. This design ensures that even in a high voltage or high current environment, no current or voltage leakage will occur, thereby avoiding possible safety hazards.

[0049] Specifically, the insulating layer 400 is usually made of a material with high insulation performance, such as rubber, plastic or special insulating coating. These materials have excellent electrical insulation performance and can effectively prevent the conduction of current or voltage. At the same time, they also have good wear resistance, corrosion resistance and high temperature resistance, and can maintain a stable insulation effect during long-term and high-intensity use.

[0050] By providing the insulating layer 400 on the base 100 and the upper cover 200 , the safety and reliability of the welding fixture are effectively improved.

[0051] Embodiment 2:

[0052] This embodiment is a further improvement made on the basis of the first embodiment.

[0053] like Figure 2 and Figure 3 As shown, in this embodiment, both the upper cover 200 and the base 100 are provided with a through-going window 110 , and the window 110 is used to expose the holes 30 on the connecting piece 10 and the bus bar 20 .

[0054] Since there are corresponding holes 30 on the connecting piece 10 and the bus bar 20, a window 110 is provided to align the connecting piece 10 and the bus bar 20. Through the window 110, the staff can clearly see the holes 30 on the connecting piece 10 and the bus bar 20, thereby facilitating the connection between the two.

[0055] Embodiment three:

[0056] This embodiment is a further improvement made on the basis of any of the above embodiments.

[0057] like Figure 5 As shown, in this embodiment, an auxiliary fastener 500 is also included to lock the upper cover 200 on the base 100;

[0058] The side ends of the base 100 and the upper cover 200 are both provided with mounting ear plates 120 extending outward, and mounting holes 30 are provided on the mounting ear plates 120 . The auxiliary fasteners 500 are bolts that connect the base 100 and the ear plates through the mounting holes 30 .

[0059] In order to further ensure the stability and safety of the welding clamp during operation, an auxiliary fastener 500 is introduced. The auxiliary fastener 500 not only enhances the overall structural strength of the clamp, but also enables the upper cover 200 to be more firmly locked on the base 100, thereby ensuring that the connecting plate 10 and the bus 20 can maintain a stable clamping state during the welding process.

[0060] Specifically, the main function of the auxiliary fastener 500 is to additionally fix the upper cover 200 to the base 100. To achieve this goal, we design outwardly extending mounting ear plates 120 at the side ends of the base 100 and the upper cover 200. These mounting ear plates 120 not only enhance the structural strength of the clamp, but also provide an interface for installing the auxiliary fastener 500.

[0061] Corresponding mounting holes 30 are provided on each mounting ear plate 120. The positions and sizes of these mounting holes 30 are precisely calculated to ensure that the auxiliary fasteners 500 can accurately pass through them and tightly connect the base 100 and the upper cover 200 together.

[0062] In this embodiment, bolts are used as auxiliary fasteners 500. Bolts are a common connection member, which has the advantages of simple structure, reliable connection, and easy disassembly. By selecting appropriate bolt specifications and materials, it can be ensured that it can provide sufficient fastening force to firmly lock the upper cover 200 on the base 100. During operation, the worker only needs to pass the bolt through the mounting hole 30 on the mounting ear plate 120 and use a nut or a bolt cap to fix it on the mounting ear plate 120 on the other side. This connection method is not only simple and fast, but also can effectively prevent the upper cover 200 from loosening or shifting during the welding process.

[0063] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A welding fixture for clamping a connecting piece (10) and a busbar (20), characterized in that: include: base(100); An upper cover (200) is arranged opposite to the base (100); and a magnetic plate (300) disposed on the base (100) and / or the upper cover (200) and used to attract the base (100) and the upper cover (200) together, so as to clamp the connecting piece (10) and the bus bar (20) between the upper cover (200) and the base (100), and the welding point between the clamped connecting piece (10) and the bus bar (20) is not blocked.

2. The welding fixture according to claim 1, characterized in that: When the magnetic plate (300) is arranged on the base (100) or the upper cover (200), the base (100) or the upper cover (200) not provided with the magnetic plate (300) is made of a material that can be attracted by the magnetic plate (300).

3. The welding fixture according to claim 1, characterized in that: The upper end surface of the base (100) is matched with the bottom of the connecting piece (10); the bottom of the upper cover (200) has a receiving groove (210) for embedding the busbar (20), and the bottom of the upper cover (200) is matched with the upper end surface of the connecting piece (10).

4. The welding fixture according to claim 3, characterized in that: The receiving groove (210) is located in the middle of the bottom of the upper cover (200).

5. The welding fixture according to claim 4, characterized in that: The upper cover (200) and the base (100) are both provided with a window (110) extending therethrough, and the window (110) is used to expose the holes (30) on the connection sheet (10) and the busbar (20).

6. The welding fixture according to any one of claims 1 to 5, characterized in that: An insulating layer (400) is provided on both the base (100) and the upper cover (200); When the connection sheet (10) and the busbar (20) are clamped between the base (100) and the upper cover (200), the insulating layer (400) is in contact with the connection sheet (10) and the busbar (20).

7. The welding fixture according to any one of claims 1 to 5, characterized in that: It also includes an auxiliary fastener (500) for locking the upper cover (200) on the base (100).

8. The welding fixture according to claim 7, characterized in that: The side ends of the base (100) and the upper cover (200) are both provided with mounting ear plates (120) extending outwards, the mounting ear plates (120) are provided with mounting holes (30), and the auxiliary fasteners (500) are bolts that connect the base (100) and the ear plates through the mounting holes (30).

9. The welding fixture according to claim 6, characterized in that: It also includes an auxiliary fastener (500) for locking the upper cover (200) on the base (100).

10. The welding fixture according to claim 9, characterized in that: The side ends of the base (100) and the upper cover (200) are both provided with mounting ear plates (120) extending outwards, the mounting ear plates (120) are provided with mounting holes (30), and the auxiliary fasteners (500) are bolts that connect the base (100) and the ear plates through the mounting holes (30).

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