Support frame and positioning connection assembly for laser welding of battery module

Abstract

The utility model belongs to the technical field of electric connection, and provides a battery module laser welding support frame which comprises a support frame body, and a plurality of bridging aluminum bar positioning grooves matched with bridging aluminum bars are evenly formed in the support frame body. Output electrode aluminum bar positioning grooves matched with output electrode aluminum bars are formed in the two ends of the supporting frame body respectively, a plurality of positioning screw holes used for achieving positioning and fixing of the supporting frame body and a battery cell module are further formed in the supporting frame body, and the positioning screw holes are formed close to the two sides of the supporting frame body respectively. The aluminum bar welding device can effectively position and fix the welding position of an aluminum bar and a battery cell, displacement of the aluminum bar cannot occur in the welding process, accurate welding between the aluminum bar and the battery cell can be achieved, the welding strength is guaranteed, the welding accuracy is high, welding is firm and reliable, the use requirements for reliability and safety of products can be met, and the aluminum bar welding device is suitable for popularization and application. And the welding operation between the aluminum bar and the battery cell is simple and convenient, the working efficiency is greatly improved, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical connection, in particular to a support frame and a positioning connection component for laser welding of a battery module. Background Art

[0002] In recent years, due to the continuous growth of global energy demand and the transformation of the energy structure, energy storage technology has become an important means to solve the instability of energy supply. Aluminum busbar is a soft connecting piece of aluminum foil material, simply referred to as aluminum busbar. In battery modules and copper busbar components, aluminum busbars are widely used as a connection method. In addition, aluminum busbar can also refer to aluminum row, which is a welding method, that is, the aluminum bar is melted by arc heating, and then the aluminum bar is fused with the metal substrate. A battery module includes a circuit board and multiple batteries, and each battery needs to be electrically connected to the circuit board to achieve charging or power transmission. The aluminum busbar component is connected between the batteries to achieve electrical connection between the batteries.

[0003] The aluminum busbar plays a role in series-parallel connection of battery cells, connecting voltage and temperature acquisition points, increasing the contact area, reducing energy consumption, and reducing temperature rise in energy storage batteries. As a core connection component, currently, most of them first place the welding area of the aluminum busbar on the cell pole head, fix the position with glue, and then use laser welding to achieve the electrical connection between the aluminum busbar and the cell pole head. The method of first fixing with glue and then performing laser welding is difficult to effectively position and fix the aluminum busbar, making it difficult to control the firmness and position of the aluminum busbar, and it is easy to cause the displacement of the aluminum busbar, which will affect the reliability and safety of the product. In addition, before laser welding, it is necessary to fix each aluminum busbar with glue, which has a large workload, is cumbersome and inconvenient to operate, and is time-consuming and laborious. Summary of the Utility Model

[0004] In order to overcome the defects of the above-mentioned prior art pointed out, the inventor of the present utility model has conducted in-depth research and completed the present utility model after a large amount of creative labor.

[0005] Specifically, the technical problem to be solved by the present utility model is: to provide a support frame and a positioning connection component for laser welding of a battery module to solve the technical problems that the current working method of first fixing the aluminum busbar with glue and then performing laser welding is difficult to effectively position and fix the aluminum busbar, is easy to cause the displacement of the aluminum busbar, and is cumbersome and inconvenient to operate, and is time-consuming and laborious.

[0006] To solve the above technical problems, the technical solution of the present utility model is:

[0007] A support frame for laser welding of a battery module, comprising a support frame body, wherein a plurality of bridging aluminum bar positioning grooves adapted to bridging aluminum bars are uniformly formed on the support frame body, output pole aluminum bar positioning grooves adapted to output pole aluminum bars are respectively formed at two ends of the support frame body, and a plurality of positioning screw holes for positioning and fixing the support frame body to a battery cell module are further provided on the support frame body, and the positioning screw holes are respectively arranged close to two sides of the support frame body.

[0008] As an improved technical solution, a plurality of first locking buckles for positioning and fixing the bridging aluminum bars are provided on the support frame body, and the first locking buckles are respectively located at two ends and / or two sides of the bridging aluminum bar positioning grooves;

[0009] Second locking buckles and third locking buckles for positioning and fixing the output pole aluminum bars are provided at the end parts of the support frame body, and the second locking buckles and the third locking buckles are respectively located at two ends and / or two sides of the output pole aluminum bar positioning grooves;

[0010] The first locking buckles, the second locking buckles and the third locking buckles are all integrally formed structures of the support frame body.

[0011] As an improved technical solution, copper sheet avoiding notches communicated with the output pole aluminum bar positioning grooves are respectively formed at two ends of the support frame body.

[0012] As an improved technical solution, wire avoiding notches communicated with the bridging aluminum bar positioning grooves and the output pole aluminum bar positioning grooves are formed on the support frame body, and the wire avoiding notches are all located inside the support frame body.

[0013] As an improved technical solution, a plurality of tie-tape fixing holes are formed on the support frame body, and the tie-tape fixing holes are respectively located between adjacent bridging aluminum bar positioning grooves and between adjacent bridging aluminum bar positioning grooves and output pole aluminum bar positioning grooves.

[0014] As an improved technical solution, a plurality of battery cell explosion-proof valve holes are further formed on the support frame body, and the battery cell explosion-proof valve holes are located in the middle of the support frame body and are uniformly arranged along the length direction of the support frame body.

[0015] As an improved technical solution, there are two rows of the bridging aluminum bar positioning grooves, the two rows of bridging aluminum bar positioning grooves are respectively located on two sides of the battery cell explosion-proof valve holes, and the output pole aluminum bar positioning grooves are located at two ends of one row of the bridging aluminum bar positioning grooves.

[0016] The present utility model also discloses a positioning and connecting component, which includes the support frame for laser welding of the battery module described above, and also includes a bridging aluminum bar, an output pole aluminum bar and an output pole copper sheet. The bridging aluminum bars are respectively positioned and installed in the bridging aluminum bar positioning grooves, and are positioned and fixed by the first locking buckles. The output pole aluminum bars are respectively positioned and installed in the output pole aluminum bar positioning grooves, and are positioned and fixed by the second locking buckles and the third locking buckles. One end of the output pole copper sheet is connected to the output pole aluminum bar, and the other end of the output pole copper sheet extends outside the support frame body.

[0017] As an improved technical solution, a nickel-plated protective layer is provided on the surface of the output pole copper sheet.

[0018] As an improved technical solution, both the bridging aluminum bar and the output pole aluminum bar are connected with signal lines and temperature sensing lines. The signal lines and the temperature sensing lines extend outside the aluminum bar positioning grooves through the wire avoiding notches, and the signal lines and the temperature sensing lines are fixed to the support frame body by the cable ties passing through the cable tie fixing holes.

[0019] After adopting the above technical solutions, the beneficial effects of the present utility model are as follows:

[0020] The support frame for laser welding of the battery module has a simple structure. During use, the bridging aluminum bars are respectively positioned and clamped in the bridging aluminum bar positioning grooves, and the output pole aluminum bars are respectively positioned and clamped in the output pole aluminum bar positioning grooves. Then, the support frame body and the battery cell module are fixedly connected together by the positioning screws passing through the positioning screw holes. After the support frame body and the battery cell module are fixedly connected, the bridging aluminum bars and the output pole aluminum bars respectively correspond to the battery cell pole heads. Finally, the bridging aluminum bars and the output pole aluminum bars are respectively welded to the battery cell pole heads by laser welding to achieve the electrical connection between the aluminum bars and the battery cell pole heads.

[0021] Through the support frame for laser welding of the battery module, the welding positions of the aluminum bars and the battery cells can be effectively positioned and fixed, and the displacement of the aluminum bars will not occur during the welding process. Therefore, the precise welding between the aluminum bars and the battery cells can be achieved, ensuring the welding strength, high welding precision and reliable welding. It can meet the use requirements of the reliability and safety of the product, and makes the welding operation between the aluminum bars and the battery cells simple and convenient, greatly improving the work efficiency and having strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0023] Figure 1Schematic diagram of the support frame for laser welding of the battery module of the present utility model;

[0024] Figure 2 Partial schematic diagram of the support frame for laser welding of the battery module of the present utility model;

[0025] Figure 3 Schematic diagram of the installation of the aluminum bar on the support frame for laser welding of the battery module of the present utility model;

[0026] Figure 4 Another schematic diagram of the installation of the aluminum bar on the support frame for laser welding of the battery module of the present utility model;

[0027] Figure 5 Schematic diagram of the bridging aluminum bar of the present utility model;

[0028] Figure 6 Schematic diagram of the connection structure between the output pole aluminum bar and the output pole copper sheet of the present utility model;

[0029] Reference numerals: 1 - support frame body; 11 - bridging aluminum bar positioning groove; 12 - output pole aluminum bar positioning groove; 13 - positioning screw hole; 14 - first locking buckle; 15 - second locking buckle; 16 - third locking buckle; 17 - copper sheet avoidance notch; 18 - wire avoidance notch; 19 - tie - strap fixing hole; 110 - cell explosion - proof valve hole;

[0030] 2 - bridging aluminum bar; 3 - output pole aluminum bar; 4 - output pole copper sheet. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0033] At the same time, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously.

[0034] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] As Figures 1 to 6 As commonly shown, this embodiment provides a support frame for laser welding of a battery module, including a support frame body 1. A number of bridging aluminum bar positioning grooves 11 adapted to the bridging aluminum bars 2 are evenly formed on the support frame body 1. The bridging aluminum bar positioning grooves 11 are used to position and place the bridging aluminum bars 2. Output pole aluminum bar positioning grooves 12 adapted to the output pole aluminum bars 3 are respectively formed at both ends of the support frame body 1. The output pole aluminum bar positioning grooves 12 are used to position and place the output pole aluminum bars 3. A number of positioning screw holes 13 for positioning and fixing it to the battery cell module are further provided on the support frame body 1. The positioning screw holes 13 are respectively arranged close to both sides of the support frame body 1. After the bridging aluminum bars 2 and the output pole aluminum bars 3 are positioned and placed on the support frame body 1, it is convenient to fix the support frame body 1 to the battery cell module by using positioning screws passing through the positioning screw holes 13.

[0036] This support frame for laser welding of a battery module has a simple structure. When in use, the bridging aluminum bars 2 are respectively positioned and clamped in the bridging aluminum bar positioning grooves 11, and the output pole aluminum bars 3 are respectively positioned and clamped in the output pole aluminum bar positioning grooves 12. Then, the support frame body 1 is fixedly connected to the battery cell module by using positioning screws passing through the positioning screw holes 13. After the support frame body 1 is fixedly connected to the battery cell module, the bridging aluminum bars 2 and the output pole aluminum bars 3 respectively correspond to the battery cell pole heads. Finally, the bridging aluminum bars 2 and the output pole aluminum bars 3 are respectively welded to the battery cell pole heads by laser welding to realize the electrical connection between the aluminum bars and the battery cell pole heads.

[0037] To realize the positioning and clamping of the bridging aluminum bars 2 in the bridging aluminum bar positioning grooves 11, a number of first locking buckles 14 for positioning and fixing the bridging aluminum bars 2 are provided on the support frame body 1. The first locking buckles 14 are respectively located at both ends and / or both sides of the bridging aluminum bar positioning grooves 11. Through the first locking buckles 14, it is possible to prevent the bridging aluminum bars 2 from coming out of the grooves and effectively avoid the displacement of the bridging aluminum bars 2 during the welding process, thereby ensuring the precise welding of the bridging aluminum bars 2 and the battery cells.

[0038] In one embodiment, each bridging aluminum bar positioning groove 11 is equipped with two first locking buckles 14, which are respectively located at both ends of the bridging aluminum bar positioning groove 11, and the two first locking buckles 14 correspond to each other. After the bridging aluminum bar 2 is clamped into the bridging aluminum bar positioning groove 11, the first locking buckles 14 can limit the position of the bridging aluminum bar 2, ensuring the firmness of the bridging aluminum bar 2 in the bridging aluminum bar positioning groove 11 and preventing the bridging aluminum bar 2 from shifting.

[0039] To achieve the positioning and clamping of the output pole aluminum bar 3 in the output pole aluminum bar positioning groove 12, the end of the support frame body 1 is provided with a second locking buckle 15 and a third locking buckle 16 for positioning and fixing the output pole aluminum bar 3. The second locking buckle 15 and the third locking buckle 16 are respectively located at both ends and / or both sides of the output pole aluminum bar positioning groove 12; through the second locking buckle 15 and the third locking buckle 16, the output pole aluminum bar 3 can be prevented from coming out of the groove, and the output pole aluminum bar 3 can be effectively prevented from shifting during the welding process, thereby ensuring the precise welding of the output pole aluminum bar 3 and the battery cell.

[0040] In one embodiment, each output pole aluminum bar positioning groove 12 is equipped with a second locking buckle 15 and a third locking buckle 16, which are respectively located at both ends of the output pole aluminum bar positioning groove 12. After the output pole aluminum bar 3 is clamped into the output pole aluminum bar positioning groove 12, the second locking buckle 15 and the third locking buckle 16 can limit the position of the output pole aluminum bar 3, ensuring the firmness of the output pole aluminum bar 3 in the output pole aluminum bar positioning groove 12 and preventing the output pole aluminum bar 3 from shifting.

[0041] In one embodiment, the first locking buckle 14, the second locking buckle 15, and the third locking buckle 16 are all integrally formed structures of the support frame body 1, with high structural strength, convenient for integral injection molding, and low manufacturing cost.

[0042] In one embodiment, copper sheet avoidance slots 17 communicating with the bridging aluminum bar positioning groove 11 are respectively opened at both ends of the support frame body 1. The provided copper sheet avoidance slots 17 facilitate the connection between the output pole copper sheet 4 and the output pole aluminum bar 3. One end of the output pole copper sheet 4 is connected to the output pole aluminum bar 3, and the other end of the output pole copper sheet 4 extends outside the support frame through the copper sheet avoidance slot.

[0043] In one embodiment, wire avoidance slots 18 communicating with the bridging aluminum bar positioning groove 11 and the output pole aluminum bar positioning groove 12 are opened on the support frame body 1, and the wire avoidance slots 18 are all located inside the support frame body 1. The provided wire avoidance slots 18 facilitate the routing of the signal wires and temperature sensing wires electrically connected to the bridging aluminum bar 2 and the output pole aluminum bar 3. The signal wires and temperature sensing wires are welded to the aluminum bar through the wire avoidance slots 18 to achieve electrical connection.

[0044] In one embodiment, a plurality of cable tie fixing holes 19 are formed in the support frame body 1. The cable tie fixing holes 19 are respectively located between adjacent bridging aluminum bar positioning grooves 11 and between adjacent bridging aluminum bar positioning grooves 11 and the output pole aluminum bar positioning groove 12. The provided cable tie fixing holes 19 facilitate passing the cable tie through the cable tie fixing holes 19 to realize the wiring of the signal line and the temperature sensing line, making the wiring of the signal line and the temperature sensing line neat and with a beautiful appearance.

[0045] In one embodiment, a plurality of battery cell explosion-proof valve holes 110 are further formed in the support frame body 1. The battery cell explosion-proof valve holes 110 are located in the middle of the support frame body 1 and are arranged uniformly along the length direction of the support frame body 1. The provided battery cell explosion-proof valve holes 110 are used for the explosion-proof valve to spray out electrolyte and high-temperature gas when the battery cell has a thermal runaway, without blocking the electrolyte and high-temperature gas.

[0046] In one embodiment, there are two rows of bridging aluminum bar positioning grooves 11. The two rows of bridging aluminum bar positioning grooves 11 are respectively located on both sides of the battery cell explosion-proof valve holes 110. The output pole aluminum bar positioning groove 12 is located at both ends of one row of bridging aluminum bar positioning grooves 11. Thus, it is convenient to realize the connection of the battery cell module.

[0047] Through this support frame for laser welding of the battery module, it can effectively position and fix the welding position of the aluminum bar and the battery cell. During the welding process, there will be no displacement of the aluminum bar, so that precise welding between the aluminum bar and the battery cell can be realized, ensuring the welding strength, with high welding precision and firm and reliable welding. It can meet the use requirements of the reliability and safety of the product, and makes the welding operation between the aluminum bar and the battery cell simple and convenient, greatly improving the work efficiency and having strong practicability.

[0048] This embodiment also discloses a positioning connection component, which includes the support frame for laser welding of the battery module described above, and also includes a bridging aluminum bar 2, an output pole aluminum bar 3 and an output pole copper sheet 4. The bridging aluminum bars 2 are respectively positioned and installed in the bridging aluminum bar positioning grooves 11 and are positioned and fixed by the first locking buckle 14. The output pole aluminum bars 3 are respectively positioned and installed in the output pole aluminum bar positioning grooves 12 and are positioned and fixed by the second locking buckle 15 and the third locking buckle 16. One end of the output pole copper sheet 4 is connected to the output pole aluminum bar 3, and the other end of the output pole copper sheet 4 extends outside the support frame body 1. The output pole copper sheet 4 has high strength and hardness, which is convenient for wiring connection. The output pole copper sheet 4 located at one end of the support frame is used to realize the connection between adjacent modules, and the output pole copper sheet 4 located at the other end of the support frame is used to connect to an external power supply to realize the charging and discharging of the battery module.

[0049] During use, first, the bridging aluminum bars 2 are respectively positioned and clamped in the bridging aluminum bar positioning grooves 11, and the output aluminum bars 3 connected to the output copper sheets 4 are respectively positioned and clamped in the output aluminum bar positioning grooves 12. Then, wiring is carried out for the bridging aluminum bars 2 and the output aluminum bars 3, and the wires are bundled using cable ties to ensure that the wiring is neat and beautiful. After that, the support frame body 1 is fixedly connected to the battery cell module using positioning screws passing through the positioning screw holes 13. Finally, laser welding is performed between the aluminum bars and the battery cell pole heads.

[0050] In one embodiment, a nickel-plated protective layer is provided on the surface of the output copper sheet 4. The nickel-plated protective layer can protect the output copper sheet 4 and prevent the increase in resistance caused by the oxidation of the output copper sheet 4.

[0051] In one embodiment, both the bridging aluminum bars 2 and the output aluminum bars 3 are connected with signal lines and temperature sensing lines. The signal lines and the temperature sensing lines extend outside the aluminum bar positioning grooves through the wire avoidance notches 18, and the signal lines and the temperature sensing lines are fixed to the support frame body 1 using cable ties passing through the cable tie fixing holes 19. Thus, the wiring is made integral and beautiful.

[0052] It should be understood that the use of these embodiments is only for explaining the present invention and is not intended to limit the protection scope of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art can make various changes, modifications, and / or variations to the present invention, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A support frame for laser welding of a battery module, characterized in that: It includes a support frame body, on which a number of bridging aluminum bar positioning grooves adapted to the bridging aluminum bar are evenly opened. At both ends of the support frame body, output pole aluminum bar positioning grooves adapted to the output pole aluminum bar are respectively opened. On the support frame body, there are also a number of positioning screw holes for positioning and fixing it with the battery cell module, and the positioning screw holes are respectively arranged close to both sides of the support frame body.

2. The support frame for laser welding of the battery module according to claim 1, wherein: On the support frame body, there are a number of first locking buckles for positioning and fixing the bridging aluminum bar, and the first locking buckles are respectively located at both ends and / or both sides of the bridging aluminum bar positioning groove; At the end of the support frame body, there are a second locking buckle and a third locking buckle for positioning and fixing the output pole aluminum bar, and the second locking buckle and the third locking buckle are respectively located at both ends and / or both sides of the output pole aluminum bar positioning groove; The first locking buckle, the second locking buckle and the third locking buckle are all integrally formed structures of the support frame body.

3. The support frame for laser welding of the battery module according to claim 1, characterized in that: At both ends of the support frame body, copper sheet avoidance notches communicating with the output pole aluminum bar positioning groove are respectively opened.

4. The support frame for laser welding of the battery module according to claim 1, wherein: The support frame body is provided with wire harness avoidance notches respectively communicating with the bridging aluminum bar positioning groove and the output pole aluminum bar positioning groove, and the wire harness avoidance notches are all located inside the support frame body.

5. The support frame for laser welding of the battery module according to claim 1, wherein: On the support frame body, a number of cable tie fixing holes are opened, and the cable tie fixing holes are respectively located between adjacent bridging aluminum bar positioning grooves and between adjacent bridging aluminum bar positioning grooves and the output pole aluminum bar positioning grooves.

6. The support frame for laser welding of the battery module according to claim 1, wherein: On the support frame body, there are also a number of battery cell explosion-proof valve holes, and the battery cell explosion-proof valve holes are located in the middle of the support frame body and are evenly arranged along the length direction of the support frame body.

7. The support frame for laser welding of battery modules according to claim 6, characterized in that: There are two rows of the bridging aluminum bar positioning grooves, and the two rows of the bridging aluminum bar positioning grooves are respectively located on both sides of the battery cell explosion-proof valve holes, and the output pole aluminum bar positioning grooves are located at both ends of one row of the bridging aluminum bar positioning grooves.

8. A positioning and connecting component, characterized in that: It includes a support frame for laser welding of a battery module according to any one of claims 1-7, and also includes a bridging aluminum bar, an output pole aluminum bar and an output pole copper sheet. The bridging aluminum bars are respectively positioned and installed in the bridging aluminum bar positioning grooves and are positioned and fixed by the first locking buckles. The output pole aluminum bars are respectively positioned and installed in the output pole aluminum bar positioning grooves and are positioned and fixed by the second locking buckle and the third locking buckle. One end of the output pole copper sheet is connected to the output pole aluminum bar, and the other end of the output pole copper sheet extends outside the support frame body.

9. The positioning and connecting component according to claim 8, characterized in that: The surface of the output pole copper sheet is provided with a nickel-plated protective layer.

10. The positioning and connecting component according to claim 8, wherein: Both the bridging aluminum bar and the output pole aluminum bar are connected with signal lines and temperature sensing lines. The signal lines and the temperature sensing lines extend outside the aluminum bar positioning groove through the wire harness avoidance notches, and the signal lines and the temperature sensing lines are fixed to the support frame body by cable ties passing through the cable tie fixing holes.

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