Assembled battery laser welding tool and welding production method

Abstract

The invention discloses an assembled battery laser welding tool and a welding production method.The assembled battery laser welding tool comprises a tool body, two first grooves are formed in the top of the tool body, the two first grooves are arranged in a left-right spaced mode, and a welding area is arranged between the two first grooves; a first anvil block is arranged on the lower side of the welding area and detachably connected with the tool body, and a metal sheet is arranged on the upper surface of the first anvil block. The two battery components are placed in the two first grooves, the two tabs to be welded are stacked on the upper side of the metal sheet, then welding is conducted, combination of the two battery components is completed, then the two battery components are taken out, whether the tabs are welded through or not can be judged by judging whether the first anvil block is connected with the welded tabs or not, careful observation is not needed, and the welding efficiency is improved. And energy consumed by workers is reduced, and the production efficiency is improved. According to the welding production method, the laser welding tool for the assembled battery is used for welding the assembled battery.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a combined battery laser welding tool and a welding production method. Background Art

[0002] When producing assembled batteries, the tabs of two batteries need to be welded. Generally, the two batteries are positioned with a tool and then laser welded. Insufficient laser welding power will result in incomplete welding of the tabs, and the two tabs are easy to separate and have poor contact. Excessive laser welding power will cause the tabs to be perforated, neither of which meets production requirements. However, during the welding process, it is difficult for workers to determine whether the tabs are welded through, and each battery tab that has been welded needs to be carefully observed. The workers need to spend a lot of energy, which is not conducive to improving production efficiency. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a battery assembly laser welding tool and a welding production method.

[0004] According to the first aspect of the present invention, the assembled battery laser welding tool comprises a tool body, the top of the tool body is provided with two first grooves for placing batteries, the two first grooves are spaced apart from each other, and a welding area is provided between the two first grooves; a first anvil is provided on the lower side of the welding area, the first anvil is detachably connected to the tool body, and a metal sheet is provided on the upper surface of the first anvil.

[0005] The combined battery laser welding tooling according to the embodiment of the first aspect of the present invention has at least the following technical effects: when in use, the two battery components to be combined are placed in the two first grooves respectively, and the two pole ears to be welded are stacked on the upper side of the metal sheet of the first anvil, and then the laser welding equipment is used to weld the two pole ears stacked on the upper side of the first anvil, that is, the combination of the two battery components is completed, and then the two battery components are taken out, and whether the pole ears are welded through can be determined by judging whether the first anvil is engaged with the welded pole ears, without the need for careful observation, reducing the energy required by the staff, and helping to improve production efficiency.

[0006] According to some embodiments of the present invention, the first anvil is in the shape of a strip extending forward and backward, the front-back dimension of the first anvil is larger than the front-back dimension of the first groove, and the metal sheet is located between the welding area and the first anvil.

[0007] According to some embodiments of the present invention, a second groove is provided on the top of the tool body, the first anvil is provided in the second groove, and the first anvil is in contact with the second groove.

[0008] According to some embodiments of the present invention, one end of the second groove is provided with a cover and the other end is open, and the first anvil is in contact with the cover.

[0009] According to some embodiments of the present invention, a plurality of spare anvils are further included, and the structure of the spare anvils is consistent with the structure of the first anvil.

[0010] According to some embodiments of the present invention, the tooling body is provided with a parts box, and a plurality of the spare anvil blocks are arranged in the parts box.

[0011] According to the welding production method of the second embodiment of the present invention, the above-mentioned assembled battery laser welding tool is used to perform welding processing of the assembled battery, and the welding production method includes the following steps:

[0012] Place two single cells into the two first grooves respectively, so that the two tabs to be welded are sequentially stacked on the upper side of the metal sheet of the first anvil;

[0013] Laser welding is performed on the two tabs that need to be welded to obtain an assembled battery.

[0014] The welding production method according to the embodiment of the second aspect of the present invention has at least the following technical effects: by using the above-mentioned assembled battery laser welding tooling, it is convenient to position and weld the two battery components to obtain an assembled battery, and after obtaining the assembled battery, it is possible to determine whether the first anvil is engaged with the welded tab to determine whether the tab is welded through, without the need for careful observation, thereby reducing the energy required by the staff and helping to improve production efficiency.

[0015] According to some embodiments of the present invention, the welding production method further comprises the following steps:

[0016] Determine whether the assembled battery has welding defects;

[0017] The assembled battery is sent to the corresponding subsequent process according to whether there are welding defects.

[0018] According to some embodiments of the present invention, the step of determining whether the assembled battery has a welding defect includes:

[0019] Remove the assembled battery from the tool body;

[0020] Determining whether the first anvil is connected to the welded tab;

[0021] When the first anvil is connected to the welded tab, it is determined that the assembled battery has a welding defect.

[0022] According to some embodiments of the present invention, the assembled battery laser welding tool further includes a plurality of spare anvils, the structure of the spare anvils being consistent with the structure of the first anvil; and the step of sending the assembled battery to a corresponding subsequent process according to whether there is a welding defect comprises:

[0023] When the first anvil is connected to the welded tab, the assembled battery and the first anvil are sent to a subsequent process together;

[0024] The welding production method also includes the following steps:

[0025] Take a spare anvil and replace the first anvil.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 3. It is a schematic diagram of the three-dimensional structure of the assembled battery laser welding tooling according to an embodiment of the present invention;

[0029] Figure 2 Schematic diagram of the exploded structure of the assembled battery laser welding tooling according to an embodiment of the present invention;

[0030] Figure 3 Schematic diagram of the use state of the assembled battery laser welding tooling according to the embodiment of the present invention;

[0031] Figure 4 is a flow chart of a welding production method according to an embodiment of the present invention;

[0032] In the attached figure:

[0033] 001-battery component; 100-tool body; 110-first groove; 111-through groove; 120-second groove; 121-cover; 130-avoidance through hole; 200-first anvil block; 210-metal sheet; 300-spare anvil block. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the directions or positional relationships indicated, such as up, down, front, back, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the meaning of "several" is one or more, the meaning of "many" is more than two, greater than, less than, exceed, etc. are understood to exclude the number itself, and above, below, within, etc. are understood to include the number itself. If there is a description of the first and the second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] Reference below Figures 1 to 4 The laser welding tool and welding production method of assembled batteries according to the embodiments of the present invention are described.

[0038] The assembled battery laser welding tooling according to the first aspect of the present invention is as follows: Figure 1 , including a tooling body 100, the tooling body 100 includes a bottom plate, a top plate and a plurality of support plates, the bottom plate and the top plate are both in the shape of a rectangular plate arranged horizontally, the top plate is arranged above the bottom plate at intervals, the support plate is arranged vertically, the top end of the support plate is fixedly connected to the top plate, and the lower end of the support plate is fixedly connected to the bottom plate; two first grooves 110 are arranged at the top of the tooling body 100, the first grooves 110 are recessed downward from the upper surface of the top plate, the two first grooves 110 are arranged at intervals on the left and right, the two first grooves 110 are arranged in a left-right mirror symmetric manner, the first grooves 110 are used to place batteries or battery components 001, a welding area is arranged between the two first grooves 110, and the bottom plate is provided with an avoidance through hole 130, refer to Figure 2 , the avoidance through hole 130 is arranged below the welding area; the front wall and the rear wall of the first groove 110 are both provided with a through groove 111 extending forward and backward, so that the staff can place their fingers on the through groove 111 to clamp the battery component 001 from the front or rear side of the battery component 001, which is convenient for the staff to take and place the battery component 001; a first anvil block 200 is arranged on the lower side of the welding area, and the first anvil block 200 crosses from the upper side of the avoidance through hole 130, and the lateral dimension of the first anvil block 200 is smaller than the lateral dimension of the avoidance through hole 130, and the first anvil block 200 is detachably connected to the tooling main body 100, and a metal sheet 210 is arranged on the upper surface of the first anvil block 200.

[0039] The combined battery laser welding tooling is used to combine and connect two battery components 001. Battery component 001 can be a single battery. In this case, the two pole ears of battery component 001 are arranged at intervals in front and back, and the pole ears of the two battery components 001 located on the rear side are stacked on the upper side of the metal sheet 210 to facilitate laser welding. The pole ears of the two battery components 001 located on the front side are all arranged in front of the metal sheet 210; battery component 001 can also be two single batteries stacked and connected in series. In this case, the two pole ears of battery component 001 are both located on the rear side of battery component 001 and are arranged at intervals in the upper and lower sides. The pole ears of the two battery components 001 located on the upper side are stacked on the upper side of the metal sheet 210 to facilitate laser welding. The pole ears on the lower side of each battery component 001 are provided with external connecting wires. The external connecting wires are used to connect to external electrical equipment after the combined battery is manufactured. The external connecting wires can pass through the avoidance through hole 130 from top to bottom to avoid the external connecting wires interfering with welding. It is understandable that if the pole tab is welded through, the metal sheet 210 of the first anvil 200 will also be welded to the pole tab; wherein, the metal sheet 210 can be set to a copper-nickel-plated sheet, an aluminum sheet or a nickel sheet, which is a commonly used material for battery pole tabs, so that the metal sheet 210 and the pole tab to be welded are made of the same material, and the melting points of the metal sheet 210 and the pole tab to be welded are consistent or close, thereby avoiding the problem that the melting point of the metal sheet 210 is much greater than the melting point of the pole tab to be welded, resulting in the pole tab not being able to be connected to the metal sheet 210 even if it is welded through, and avoiding the problem that the melting point of the metal sheet 210 is much lower than the melting point of the pole tab to be welded, resulting in the pole tab being connected to the metal sheet 210 even if it is not welded through.

[0040] Reference Figure 3 When in use, the two battery components 001 to be combined are placed in the two first grooves 110 respectively, and the two pole ears to be welded are stacked on the upper side of the metal sheet 210 of the first anvil 200, and then the laser welding equipment is used to weld the two pole ears stacked on the upper side of the first anvil 200, that is, the combination of the two battery components 001 is completed, and then the two battery components 001 are taken out. By judging whether the first anvil 200 is engaged with the welded pole ear, it can be judged whether the pole ear is welded through, without careful observation, reducing the energy required by the staff, which is conducive to improving production efficiency.

[0041] In some embodiments of the present invention, the first anvil 200 is in the shape of a strip extending forward and backward, the front and rear dimensions of the first anvil 200 are larger than the front and rear dimensions of the first groove 110, and the metal sheet 210 is located between the welding area and the first anvil 200. The cross section of the first anvil 200 can be rectangular, so that the first anvil 200 will not roll, and the metal sheet 210 can be stably located on the upper surface of the first anvil 200; in this way, after the two battery components 001 are combined into a combined battery by laser welding, the two ends of the first anvil 200 protrude from the two ends of the combined battery, which is convenient for the staff to pinch the ends of the first anvil 200 to determine whether the first anvil 200 is connected to the combined battery. It can be understood that the first anvil 200 is a consumable part in the laser welding tooling of the combined battery during use; the first anvil 200 of this embodiment has a simple structure, can be easily made by pure manual labor, and has a small size and requires less materials, so that the labor cost and material cost of making the first anvil 200 are relatively low.

[0042] In some embodiments of the present invention, the assembled battery laser welding tool further includes a plurality of spare anvils 300, and the structure of the spare anvils 300 is consistent with that of the first anvil 200. In this way, when the tab is welded through and the first anvil 200 is joined to the assembled battery, the assembled battery and the first anvil 200 can be sent to the subsequent rework process together, and then a spare anvil 300 is taken and placed at the lower side of the welding area to replace the first anvil 200, so that the assembled battery laser welding tool can continue to be used without interrupting production.

[0043] In some embodiments of the present invention, the tooling body 100 is provided with a parts box, and a plurality of spare anvils 300 are provided in the parts box. The parts box is fixedly provided on the tooling body 100, and the parts box can be provided between the top plate and the bottom plate; this makes it easy to take the spare anvils 300 at any time. Among them, a support plate can be provided between the front edge of the bottom plate and the front edge of the top plate, and this support plate is called the first plate, and another support plate is provided between the rear edge of the bottom plate and the rear edge of the top plate, and this support plate is called the second plate. The parts box can be provided between the first plate and the second plate, so that the parts box is located between the bottom plate and the top plate, and the parts box does not protrude from the tooling body 100; further, the first plate can be provided as the front wall of the parts box, and the second plate can be provided as the rear wall of the parts box, and the parts box can be formed by only adding the front wall and the rear wall of the parts box to the tooling body, which is easy to manufacture.

[0044] In some embodiments of the present invention, a second groove 120 is provided on the top of the tool body 100, and the first anvil 200 is provided in the second groove 120, and the first anvil 200 contacts the second groove 120. The second groove 120 can limit the lateral position of the first anvil 200, which is convenient for positioning the first anvil 200; the first anvil 200 can be directly placed in the first groove 110, and the second groove 120 will not hinder the upward removal of the first anvil 200; in this way, when the two battery components 001 are taken out after welding, if the first anvil 200 is driven by the two battery components 001 to be taken out, it can be judged that the first anvil 200 is engaged with the assembled battery, which is more convenient for the staff to judge whether the tab is welded through.

[0045] In some embodiments of the present invention, a cover 121 is provided at one end of the second groove 120, and the other end is open, and the first anvil 200 contacts the cover 121. The cover 121 is provided at the front end of the second groove 120. When the staff places the first anvil 200, they can push the first anvil 200 forward from the rear end of the first anvil 200 so that the front end of the first anvil 200 contacts the cover 121, and the front and rear positions of the first anvil 200 are determined, and the operation is relatively simple.

[0046] The welding production method of the second embodiment of the present invention uses the above-mentioned assembled battery laser welding tool to perform welding processing on the assembled battery. The welding production method includes the following steps:

[0047] Step S100, two single cells are placed in two first grooves 110 respectively, so that two tabs to be welded are sequentially stacked on the upper side of the metal sheet 210 of the first anvil 200;

[0048] Step S200, laser welding is performed on two tabs to be welded to obtain an assembled battery.

[0049] By using the above-mentioned assembled battery laser welding tooling, it is convenient to position and weld the two battery components 001 to obtain an assembled battery. After obtaining the assembled battery, it is possible to determine whether the first anvil 200 is engaged with the welded tab to determine whether the tab is welded through without careful observation, which reduces the energy required by the staff and is conducive to improving production efficiency.

[0050] In some embodiments of the present invention, the welding production method further comprises the following steps:

[0051] Step S300, determining whether there is a welding defect in the assembled battery;

[0052] Step S400 , sending the assembled battery to a corresponding subsequent process according to whether there are welding defects.

[0053] In step S300, the criterion for determining whether there is a welding defect in the assembled battery is whether there is a situation where the pole tab is not welded through due to insufficient laser welding power or a situation where the pole tab is perforated due to excessive laser welding power. When at least one of the situations where the pole tab is not welded through due to insufficient laser welding power or the pole tab is perforated due to excessive laser welding power occurs, it is determined that there is a welding defect in the assembled battery.

[0054] In step S400, there are two types of subsequent processes: a normal process and a recycling process. The normal process is to carry out subsequent testing, packaging and other processes normally; the recycling process is to recycle products that do not meet the requirements; when the assembled battery has no welding defects, the assembled battery is sent to the normal process; when the assembled battery has welding defects, the assembled battery is sent to the recycling process.

[0055] In some embodiments of the present invention, reference Figure 4 , the above step S300 specifically includes:

[0056] Step S310, removing the assembled battery from the tool body 100;

[0057] Step S320, determining whether the first anvil 200 is connected to the welded tab;

[0058] Step S330: When the first anvil 200 is connected to the welded tab, it is determined that the assembled battery has a welding defect.

[0059] By judging whether the first anvil 200 is engaged with the electrode tab after welding, it can be judged whether the electrode tab has a perforation defect, without the need for careful observation, which reduces the energy consumed by the staff and is conducive to improving production efficiency.

[0060] In some embodiments of the present invention, the assembled battery laser welding tool further includes a plurality of spare anvils 300, and the structure of the spare anvils 300 is consistent with the structure of the first anvil 200; the step of sending the assembled battery to the corresponding subsequent process according to whether there is a welding defect includes:

[0061] Step S410, when the first anvil 200 is connected to the welded tab, the assembled battery and the first anvil 200 are sent to a subsequent process together;

[0062] The welding production method also includes the following steps:

[0063] Step S500 , taking a spare anvil 300 to replace the first anvil 200 .

[0064] In step S410, when the first anvil 200 is connected to the welded tab, the assembled battery and the first anvil 200 are sent to the recycling process together, and the staff of the recycling process separates the first anvil 200 from the assembled battery, and then reuses the first anvil 200 as a spare anvil 300. In this way, the barrier battery laser welding tool can be used continuously and will not be unusable due to welding defects in a certain welding, which is conducive to improving production efficiency.

[0065] The preferred embodiments of the present invention are specifically described above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A battery assembly laser welding tool, characterized in that: The tooling body (100) comprises a tooling body (100), wherein the top of the tooling body (100) is provided with two first grooves (110) for placing batteries, the two first grooves (110) are arranged at intervals on the left and right, and a welding area is provided between the two first grooves (110); a first anvil (200) is provided on the lower side of the welding area, the first anvil (200) is detachably connected to the tooling body (100), and a metal sheet (210) is provided on the upper surface of the first anvil (200).

2. The assembled battery laser welding tool according to claim 1, characterized in that: The first anvil (200) is in the shape of a strip extending forward and backward, the front-to-back dimension of the first anvil (200) is larger than the front-to-back dimension of the first groove (110), and the metal sheet (210) is located between the welding area and the first anvil (200).

3. The assembled battery laser welding tool according to claim 1, characterized in that: A second groove (120) is provided on the top of the tool body (100), the first anvil block (200) is arranged in the second groove (120), and the first anvil block (200) is in contact with the second groove (120).

4. The assembled battery laser welding tool according to claim 3, characterized in that: One end of the second groove (120) is provided with a cover (121) and the other end is open, and the first anvil (200) is in contact with the cover (121).

5. The assembled battery laser welding tool according to claim 1, characterized in that: It also includes a plurality of spare anvil blocks (300), the structure of the spare anvil blocks (300) being consistent with the structure of the first anvil block (200).

6. The assembled battery laser welding tool according to claim 5, characterized in that: The tooling body (100) is provided with a parts box, and a plurality of spare anvil blocks (300) are arranged in the parts box.

7. A welding production method, characterized in that: The assembled battery laser welding tool according to any one of claims 1 to 6 is used to perform welding processing on the assembled battery, and the welding production method comprises the following steps: Place two single cells in two first grooves (110) respectively, so that two tabs to be welded are sequentially stacked on the upper side of the metal sheet (210) of the first anvil (200); Laser welding is performed on the two tabs that need to be welded to obtain an assembled battery.

8. The welding production method according to claim 7, characterized in that: The welding production method also includes the following steps: Determine whether the assembled battery has welding defects; The assembled battery is sent to the corresponding subsequent process according to whether there are welding defects.

9. The welding production method according to claim 8, characterized in that: The step of determining whether the assembled battery has a welding defect comprises: Removing the assembled battery from the tool body (100); Determining whether the first anvil (200) is connected to the welded tab; When the first anvil (200) is connected to the welded tab, it is determined that the assembled battery has a welding defect.

10. The welding production method according to claim 9, characterized in that: The assembled battery laser welding tool further comprises a plurality of spare anvil blocks (300), wherein the structure of the spare anvil blocks (300) is consistent with the structure of the first anvil blocks (200); The step of sending the assembled battery to a corresponding subsequent process according to whether there is a welding defect includes: When the first anvil (200) is connected to the welded tab, the assembled battery and the first anvil (200) are sent together to a subsequent process; The welding production method also includes the following steps: A spare anvil (300) is taken to replace the first anvil (200).

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