Positioning device and welding system

Abstract

The utility model discloses a positioning device and a welding system, the positioning device comprises a clamp, the clamp is used for clamping a blade battery, four vertex angle avoiding openings are formed in the clamp, and the four vertex angle avoiding openings are used for enabling four vertex angles of one battery end of the blade battery to be exposed so that the four vertex angles can be welded. The quality of welding seams at the vertex angles can be guaranteed, and defects of the welding seams at the vertex angles can be avoided to a certain extent.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a positioning device and a welding system. Background Art

[0002] In the production of blade batteries, the end caps need to be welded and fixed to the ends of the shells after the cells are put into the shells and the covers are closed. Blade batteries usually have a rectangular structure, that is, the ends of the blade batteries are rectangular, that is, the ends of the blade batteries include two long sides, two short sides and four vertex corners, of which the four vertex corners are rounded.

[0003] In the related art, side welding is used for peripheral welding of the end cover and the shell. Specifically, the welding positions between the end cover and the shell are located at the two long sides and the two short sides. Long side welds are formed on the two long sides, and short side welds are formed on the two short sides. The vertices of the four vertex angles are exactly the overlapping positions of the long side welds and the short side welds.

[0004] However, since the overlap position of the long side weld and the short side weld is set at the apex of the top angle, defects are easily caused in the welds at the top angle, which in turn easily leads to an increase in the proportion of defective products. At the same time, repairing and welding the four top corners of defective products will also lead to an extension of the processing time and a reduction in processing efficiency. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the related art, the present application provides a positioning device and a welding system to solve the problem that defects are prone to occur in the welds at the top corners in the related art.

[0006] In order to solve the above technical problems, in a first aspect, the present application provides a positioning device, which includes:

[0007] A clamp is used to clamp a blade battery. The clamp is provided with four vertex corner avoidance openings. The four vertex corner avoidance openings are used to expose four vertex corners of a battery end of the blade battery respectively so that the four vertex corners can be welded.

[0008] In a possible implementation of the first aspect, the clamp includes a first clamping assembly and a second clamping assembly, at least one of the first clamping assembly and the second clamping assembly is a movable clamping assembly that is movably arranged in a direction close to or away from the blade battery to jointly clamp or release the blade battery;

[0009] The first clamping assembly and the second clamping assembly are provided with the vertex corner avoidance opening, and / or the vertex corner avoidance opening is surrounded by the first clamping assembly and the second clamping assembly.

[0010] In a possible implementation of the first aspect, the first clamping assembly is the mobile clamping assembly, and the second clamping assembly is a fixed clamping assembly that is fixedly arranged.

[0011] In a possible implementation of the first aspect, the first pressing assembly includes a first large-surface pressing member and a first side-surface pressing member, the first large-surface pressing member is used to press the first large surface of the blade battery, and the first side-surface pressing member is used to press the first side surface of the blade battery;

[0012] and / or,

[0013] The second pressing assembly includes a second large surface pressing piece and a second side surface pressing piece. The second large surface pressing piece is used to press the second large surface of the blade battery, and the second side surface pressing piece is used to press the second side surface of the blade battery.

[0014] In a possible implementation of the first aspect, the first pressing assembly includes the first large-surface pressing member and the first side pressing member, the second pressing assembly includes the second large-surface pressing member and the second side pressing member, the second large-surface pressing member is spaced apart from and arranged opposite to the first large-surface pressing member, and the second side pressing member is spaced apart from and arranged opposite to the first side pressing member;

[0015] A top angle avoidance opening is formed between the first large surface pressing member and the first side surface pressing member, between the second large surface pressing member and the second side surface pressing member, between the second large surface pressing member and the first side surface pressing member, and between the second side surface pressing member and the first large surface pressing member.

[0016] In a possible implementation of the first aspect, the first large-surface pressing member is provided with a plurality of first long-side welding openings spaced apart along the length direction of the first long side of the battery end, each of the first long-side welding openings is used to expose a portion of the first long side so that the exposed portion of the first long side is welded, and the second large-surface pressing member is provided with a plurality of second long-side welding openings spaced apart along the length direction of the second long side of the battery end, each of the second long-side welding openings is used to expose a portion of the second long side so that the exposed portion of the second long side is welded;

[0017] and / or,

[0018] A first short side welding port is provided on the first side clamping piece, and the first short side welding port is used to expose a portion of the first short side of the battery end so that the exposed portion of the first short side can be welded. A second short side welding port is provided on the second side clamping piece, and the second short side welding port is used to expose a portion of the second short side of the battery end so that the exposed portion of the second short side can be welded.

[0019] In a possible implementation of the first aspect, a plurality of first long side welding openings are provided on the first large surface pressing member, and a plurality of second long side welding openings are provided on the second large surface pressing member; each of the vertex avoidance openings is used to correspond to a first vertex angle, a second vertex angle, a third vertex angle, and a fourth vertex angle of the battery end, respectively, and the first vertex angle, the first long side, the second vertex angle, the third vertex angle, the second long side, and the fourth vertex angle are arranged in a first order;

[0020] The positioning device also includes a rotatable turntable, and the clamp is arranged on the turntable, and the turntable is used to drive the blade battery clamped by the clamp to rotate, so that any one of the first vertex angle, the first long side, the second vertex angle, the third vertex angle, the second long side and the fourth vertex angle is used as a starting point, and the first vertex angle, the first long side, the second vertex angle, the third vertex angle, the second long side and the fourth vertex angle are welded in sequence according to the first order.

[0021] In a possible implementation manner of the first aspect, the positioning device further includes:

[0022] A protective cover is used to cover the end of the battery, and the protective cover is also used to abut against the end cover of the blade battery to position the length direction of the weld on the blade battery.

[0023] In a possible implementation of the first aspect, the protective cover is a hollow structure so that the blade battery clamped by the clamp can be welded.

[0024] In a second aspect, the present application also provides a welding system, the welding system comprising:

[0025] A welding device, the welding device is used for welding blade batteries;

[0026] The positioning device according to any one of the first aspects.

[0027] Compared with the related art, this application has at least the following beneficial effects:

[0028] In the present application, since four vertex avoidance openings are provided on the clamp for clamping the blade battery, and since the four vertex avoidance openings are used to expose the four vertex corners of one battery end of the blade battery respectively so that the four vertex corners can be welded, therefore, in the present application, when welding the end cover and the shell of the blade battery, the four vertex corners exposed by the four vertex avoidance openings can be welded first, and then the long sides and short sides of the battery end can be peripherally welded. Compared with the related art, this can avoid the tops of the four vertex corners from being used as the overlapping positions of the long side welds and the short side welds, thereby ensuring the quality of the welds at each vertex corner, that is, it can avoid defects in the welds at each vertex corner to a certain extent, and can reduce the proportion of defective products to a certain extent. At the same time, since each vertex does not need to be repaired or welded, the processing time can also be reduced, thereby improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of a positioning device provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of a partial structure of a positioning device provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of a clamp provided in an embodiment of the present application;

[0033] Figure 4 A schematic diagram of a blade battery provided in an embodiment of the present application;

[0034] Figure 5 A schematic diagram of a welding system provided in an embodiment of the present application;

[0035] Figure 6 A schematic diagram of the first step of pre-welding of a blade battery provided in an embodiment of the present application;

[0036] Figure 7 A schematic diagram of the second step of pre-welding of a blade battery provided in an embodiment of the present application;

[0037] Figure 8 A schematic diagram of step three of pre-welding of a blade battery provided in an embodiment of the present application;

[0038] Fig. 9 A schematic diagram of step 4 of pre-welding of a blade battery provided in an embodiment of the present application;

[0039] Fig.10 A schematic diagram of step five of pre-welding of a blade battery provided in an embodiment of the present application;

[0040] Fig.11 A schematic diagram of step six of pre-welding of a blade battery provided in an embodiment of the present application;

[0041] Fig.12 A schematic diagram of a pre-welded blade battery provided in an embodiment of the present application.

[0042] Description of reference numerals:

[0043] 1- fixture; 11- top corner avoidance;

[0044] 12-first clamping assembly; 121-first large surface clamping member; 1211-first long side welding joint; 122-first side clamping member;

[0045] 13-second pressing assembly; 131-second large surface pressing member; 132-second side surface pressing member;

[0046] 2- Turntable;

[0047] 3-Protective cover;

[0048] 100- positioning device;

[0049] 200-blade battery; 2001-first vertex; 2002-second vertex; 2003-third vertex; 2004-fourth vertex; 2005-first long side; 2006-second long side; 2007-first short side; 2008-second short side; 2009-first large surface; 20010-first side surface; 20011-second large surface; 20012-second side surface; 20013-long side pre-welding point; 20014-vertex pre-welding point;

[0050] 300- welding device; 3001- galvanometer. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0053] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0054] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0056] As described in the background of this application, in the production of blade batteries, after the battery cell is placed in the shell and the cover is closed, the end cover needs to be welded and fixed to the end of the shell. Blade batteries usually have a rectangular structure, that is, the end of the blade battery is rectangular, that is, the end of the blade battery includes two long sides, two short sides and four vertex corners, of which the four vertex corners are rounded.

[0057] In the related art, side welding is used for peripheral welding of the end cover and the shell. Specifically, the welding positions between the end cover and the shell are located at the two long sides and the two short sides. Long side welds are formed on the two long sides, and short side welds are formed on the two short sides. The vertices of the four vertex angles are exactly the overlapping positions of the long side welds and the short side welds.

[0058] However, since the overlap position of the long side weld and the short side weld is set at the apex of the top angle, defects are easily caused in the welds at the top angle, which in turn easily leads to an increase in the proportion of defective products. At the same time, repairing and welding the four top corners of defective products will also lead to an extension of the processing time and a reduction in processing efficiency.

[0059] In view of the above-mentioned problems, the present application provides a positioning device to solve the problem that defects are prone to occur in the welds at the top corners in the related art.

[0060] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings:

[0061] like Figure 1 , Figure 2 as well as Figure 3 As shown, the positioning device 100 includes a clamp 1, which is used to clamp the blade battery 200. Four vertex avoidance openings 11 are provided on the clamp 1. The four vertex avoidance openings 11 are used to expose four vertex corners of a battery end of the blade battery 200 respectively so that the four vertex corners can be welded.

[0062] In the present application, since four vertex avoidance openings 11 are provided on the clamp 1 for clamping the blade battery 200, and since the four vertex avoidance openings 11 are used to expose the four vertex corners of a battery end of the blade battery 200 respectively so that the four vertex corners can be welded, therefore, in the present application, when welding the end cover and the shell of the blade battery 200, the four vertex corners exposed by the four vertex avoidance openings 11 can be welded first, and then the long side and short side of the battery end can be peripherally welded. Compared with the related art, this can avoid the top of the four vertex corners as the overlapping position of the long side weld and the short side weld, thereby ensuring the quality of the welds at each vertex corner, that is, it can avoid defects in the welds at each vertex corner to a certain extent, and can reduce the proportion of defective products to a certain extent. At the same time, since each vertex does not need to be repaired or welded, the processing time can also be reduced, thereby improving the processing efficiency.

[0063] For the battery end of the blade battery 200, such as Figure 4 As shown, the four vertex angles of the battery end are respectively a first vertex angle 2001 , a second vertex angle 2002 , a third vertex angle 2003 and a fourth vertex angle 2004 , and the battery end also has a first long side 2005 , a second long side 2006 , a first short side 2007 and a second short side 2008 .

[0064] For the fixture 1, further, in a preferred embodiment, as Figure 2 and Figure 3As shown, the clamp 1 includes a first clamping assembly 12 and a second clamping assembly 13, at least one of which is a movable clamping assembly that is movably arranged in a direction close to or away from the blade battery 200 to jointly clamp or release the blade battery 200.

[0065] The first clamping assembly 12 and the second clamping assembly 13 are provided with a vertex avoidance opening 11 , and / or a vertex avoidance opening 11 is formed between the first clamping assembly 12 and the second clamping assembly 13 .

[0066] The clamp 1 is configured to include a first clamping assembly 12 and a second clamping assembly 13, which can simplify the structural composition of the clamp 1 to a certain extent. At least one of the first clamping assembly 12 and the second clamping assembly 13 is configured as a mobile clamping assembly, so that before the blade battery 200 is installed on the clamp 1 or before the blade battery 200 is removed from the clamp 1, the mobile clamping assembly can be kept away from the blade battery 200 so that the blade battery 200 can be installed on or removed from the clamp 1. Therefore, by using the mobile clamping assembly, it is convenient to install or remove the blade battery 200 on the clamp 1, that is, it is convenient for the clamp 1 to clamp or release the blade battery 200.

[0067] In other embodiments, the clamp 1 may also include three, four or more clamping components, or the clamp 1 may also include a cylinder for the blade battery 200 to enter, and a plurality of elastic clamps disposed on the cylinder. When the blade battery 200 enters the cylinder, the elastically deformed elastic clamps may clamp the blade battery 200 together to position the blade battery 200, and a vertex avoidance opening 11 may be formed between two adjacent clamps. The structure of the clamp 1 is relatively flexible. Specifically, the structure of the clamp 1 may be specifically designed according to actual use requirements, and this embodiment of the present application will not be elaborated on in detail.

[0068] Regarding the types of the first clamping assembly 12 and the second clamping assembly 13, further, in a preferred embodiment, the first clamping assembly 12 is a mobile clamping assembly, and the second clamping assembly 13 is a fixed clamping assembly that is fixedly arranged.

[0069] With such a configuration, the blade battery 200 can be clamped or released by only moving the first clamping component 12. This not only facilitates the clamping or release of the blade battery 200 by the clamp 1, but also because only one movable clamping component is provided, the structure of the clamp 1 can be simplified to a certain extent, which is conducive to the convenient manufacture of the clamp 1.

[0070] Regarding the structural composition of the first pressing assembly 12 and the second pressing assembly 13, further, as Figure 1 , Figure 2 and Figure 3As shown, the first pressing assembly 12 includes a first large surface pressing member 121 and a first side surface pressing member 122, the first large surface pressing member 121 is used to press the first large surface 2009 of the blade battery 200, and the first side surface pressing member 122 is used to press the first side surface 20010 of the blade battery 200. And / or, the second pressing assembly 13 includes a second large surface pressing member 131 and a second side surface pressing member 132, the second large surface pressing member 131 is used to press the second large surface 20011 of the blade battery 200, and the second side surface pressing member 132 is used to press the second side surface 20012 of the blade battery 200.

[0071] Such a configuration is not only helpful in simplifying the structure of the first clamping assembly 12 and / or the second clamping assembly 13 , but also helpful in reducing the overall weight of the clamp 1 .

[0072] In other embodiments, the first pressing assembly 12 and / or the second pressing assembly 13 may include a pressing member, which is L-shaped and is used to press a large surface and a side surface of the blade battery 200. Such a configuration can simplify the structural composition of the clamp 1, which is conducive to facilitating the assembly of the clamp 1.

[0073] Furthermore, if Figure 1 , Figure 2 and Figure 3 As shown, the first clamping assembly 12 includes a first large surface clamping member 121 and a first side clamping member 122, and the second clamping assembly 13 includes a second large surface clamping member 131 and a second side clamping member 132. The second large surface clamping member 131 is spaced apart from and arranged opposite to the first large surface clamping member 121, and the second side clamping member 132 is spaced apart from and arranged opposite to the first side clamping member 122.

[0074] A vertex avoidance opening 11 is formed between the first large surface pressing piece 121 and the first side surface pressing piece 122 , between the second large surface pressing piece 131 and the second side surface pressing piece 132 , between the second large surface pressing piece 131 and the first side surface pressing piece 122 , and between the second side surface pressing piece 132 and the first large surface pressing piece 121 .

[0075] Arranging the first clamping assembly 12 and the second clamping assembly 13 to include a large-surface clamping member and a side clamping member not only helps to simplify the structure of the first clamping assembly 12 and the second clamping assembly 13 , but also helps to further reduce the weight of the entire clamp 1 .

[0076] The vertex corner avoidance opening 11 formed between the first large surface pressing member 121 and the first side surface pressing member 122 and between the second large surface pressing member 131 and the second side surface pressing member 132 respectively constitute the vertex corner avoidance opening 11 set on the first pressing component 12 and the second pressing component 13, and the vertex corner avoidance opening 11 formed between the second large surface pressing member 131 and the first side surface pressing member 122 and between the second side surface pressing member 132 and the first large surface pressing member 121 constitute the vertex corner avoidance opening 11 formed between the first pressing component 12 and the second pressing component 13. Such a configuration not only facilitates the formation of the vertex corner avoidance opening 11 between the first pressing component 12 and the second pressing component 13, but also facilitates the formation of the vertex corner avoidance opening 11 on both the first pressing component 12 and the second pressing component 13.

[0077] In a preferred embodiment, since the first clamping assembly 12 is a movable clamping assembly and the second clamping assembly 13 is a fixed clamping assembly, the second large surface clamping member 131 and the second side clamping member 132 are both fixedly arranged, and the first large surface clamping member 121 and the first side clamping member 122 are both movably arranged, and the positioning device 100 also includes two clamping member driving members (not marked in the figure) for driving the first large surface clamping member 121 and the first side clamping member 122 to move respectively. In the embodiment of the present application, the clamping member driving member can be an electric cylinder, a hydraulic cylinder or a pneumatic cylinder, and the type selection is more flexible. The clamping member driving member facilitates the movable arrangement of the first large surface clamping member 121 and the first side clamping member 122.

[0078] In other embodiments, the first large-surface pressing member 121 and the first side pressing member 122 can also be driven manually. This configuration can simplify the structural composition of the positioning device 100, which is beneficial to reducing the manufacturing cost.

[0079] Regarding the formation of the vertex avoidance opening 11, in other embodiments, two notches are provided on both the first large surface pressing member 121 and the second large surface pressing member 131, and each notch constitutes each vertex avoidance opening 11. Alternatively, two notches are provided on both the first side pressing member 122 and the second side pressing member 132, and each notch constitutes each vertex avoidance opening 11. Therefore, the formation form of the vertex avoidance opening 11 is relatively flexible, and specifically, it can be selected according to the actual situation, and the embodiments of the present application will not be elaborated in detail.

[0080] Furthermore, if Figure 2As shown, the first large surface pressing member 121 is provided with a plurality of first long side welding openings 1211 spaced apart along the length direction of the first long side 2005 of the battery end, each first long side welding opening 1211 is used to expose a portion of the first long side 2005 so that the exposed portion of the first long side 2005 is welded, and the second large surface pressing member 131 is provided with a plurality of second long side welding openings spaced apart along the length direction of the second long side 2006 of the battery end, each second long side welding opening is used to expose a portion of the second long side 2006 so that the exposed portion of the second long side 2006 is welded;

[0081] and / or,

[0082] A first short side welding port is provided on the first side clamping piece 122, and the first short side welding port is used to expose a portion of the first short side 2007 of the battery end so that the exposed portion of the first short side 2007 can be welded. A second short side welding port is provided on the second side clamping piece 132, and the second short side welding port is used to expose a portion of the second short side 2008 of the battery end so that the exposed portion of the second short side 2008 can be welded.

[0083] With such an arrangement, when pre-welding the blade battery 200, through each long side welding joint and / or each short side welding joint, it is not only possible to conveniently weld multiple pre-welding points on the long side and / or short side of the battery end, thereby ensuring the welding connection effect of the end cover and the shell of the blade battery 200, but also it will not affect the positioning of the blade battery 200 by each clamping part, and thus will not affect the clamping effect of the clamp 1 on the blade battery 200.

[0084] Further, in a preferred embodiment, Figure 2 As shown, the first large surface pressing member 121 is provided with a plurality of first long side welding openings 1211, and the second large surface pressing member 131 is provided with a plurality of second long side welding openings (not shown in the figure). Each vertex avoidance opening 11 is used to correspond to the first vertex 2001, the second vertex 2002, the third vertex 2003 and the fourth vertex 2004 of the battery end, respectively. The first vertex 2001, the first long side 2005, the second vertex 2002, the third vertex 2003, the second long side 2006 and the fourth vertex 2004 are arranged in the first order.

[0085] like Figure 1As shown, the positioning device 100 also includes a rotatable turntable 2, and the clamp 1 is arranged on the turntable 2. The turntable 2 is used to drive the blade battery 200 clamped by the clamp 1 to rotate, so that any one of the first vertex 2001, the first long side 2005, the second vertex 2002, the third vertex 2003, the second long side 2006 and the fourth vertex 2004 is used as the starting point, and the first vertex 2001, the first long side 2005, the second vertex 2002, the third vertex 2003, the second long side 2006 and the fourth vertex 2004 are welded in sequence according to the first order mentioned above.

[0086] Since the long sides are relatively longer than the short sides, multiple long side welding joints are set on each large surface clamping piece, so that each long side can have multiple pre-weld points, thereby enhancing the welding connection effect between the end cover and the shell in the blade battery 200, which is beneficial to ensure the quality of the peripheral weld between the end cover and the shell, and to avoid defects in the weld.

[0087] During pre-welding, the blade battery 200 clamped by the clamp 1 is driven to rotate by the turntable 2, so that the first vertex 2001, the first long side 2005, the second vertex 2002, the third vertex 2003, the second long side 2006 and the fourth vertex 2004 are welded in sequence according to the first order mentioned above, which is beneficial to reduce the pre-welding time and thus help improve the pre-welding efficiency.

[0088] In a preferred embodiment, Figure 2 As shown, eight first long side welding openings 1211 are provided on the first large surface pressing member 121, and eight second long side welding openings are provided on the second large surface pressing member 131. In this way, the first large surface pressing member 121 and the second large surface pressing member 131 both have a large number of long side welding openings, so that each long side has a large number of pre-welding points, which is beneficial to ensure the welding connection effect between the end cover and the shell in the blade battery 200.

[0089] In a preferred embodiment, the positioning device 100 further includes a turntable driving member (not shown in the figure) for driving the turntable 2 to rotate. The turntable driving member may be one of an electric cylinder, a hydraulic cylinder and a pneumatic cylinder.

[0090] When performing pre-welding, in the process of the turntable 2 driving the blade battery 200 to rotate, it is best to use the first vertex 2001 as the starting point, and pre-weld the first vertex 2001, the first long side 2005, the second vertex 2002, the third vertex 2003, the second long side 2006 and the fourth vertex 2004 in the above-mentioned first order. Secondly, use the first long side 2005 as the starting point, and pre-weld the first long side 2005, the second vertex 2002, the third vertex 2003, the second long side 2006, the fourth vertex 2004 and the first vertex 2001 in the above-mentioned first order. In this way, it is convenient to pre-weld the blade battery 200.

[0091] like Figure 1 and Figure 3 As shown, the positioning device 100 also includes a protective cover 3, which is used to cover the end of the battery. The protective cover 3 is also used to abut against the end cover of the blade battery 200 to position the length direction of the weld on the blade battery 200.

[0092] Such an arrangement can not only protect the end cap of the blade battery through the protective cover 3 arranged at the end of the battery, but also the protective cover 3 can position the length direction of the weld on the blade battery 200, thereby ensuring the extension direction of the weld length, which is beneficial to ensuring the quality of the weld.

[0093] Furthermore, if Figure 1 and Figure 3 As shown, the protective cover 3 is a hollow structure so that the blade battery 200 clamped by the clamp 1 can be welded.

[0094] Providing the protective cover 3 with a hollow structure can not only reduce the weight of the protective cover 3, but also facilitate the exposure of the battery end covered by the protective cover 3, thereby facilitating welding of the battery end.

[0095] In a preferred embodiment, the protective cover 3 is disposed on the turntable 2 , which facilitates the arrangement of the protective cover 3 in the positioning device 100 .

[0096] In a preferred embodiment, the positioning device 100 also includes a push drive, a negative pressure dust removal assembly and a PLC control module. Among them, the push drive is used to push the blade battery 200 so that the blade battery 200 enters the fixture 1. The push drive can be one of an electric cylinder, a hydraulic cylinder and a pneumatic cylinder, and the type selection is more flexible. The negative pressure dust removal assembly includes a negative pressure dust removal hood and an air source connected to the negative pressure dust removal hood. The negative pressure dust removal assembly is used for dust removal during the welding process, which is beneficial to optimize the working environment and ensure the health of the staff. The PLC control module is electrically connected to the push drive, the turntable drive and each clamping member drive to control the start and shut down of each drive.

[0097] The present application also provides a welding system, such as Figure 5 As shown, the welding system includes a welding device 300 and a positioning device 100, wherein the welding device 300 is used to weld the blade battery 200, and the positioning device 100 has the same structure as any one of the positioning devices 100 in the above-mentioned embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description in the above-mentioned embodiments, and this embodiment will not be repeated here.

[0098] In the present application, since four vertex avoidance openings 11 are provided on the clamp 1 for clamping the blade battery 200, and since the four vertex avoidance openings 11 are used to expose the four vertex corners of a battery end of the blade battery 200 respectively so that the four vertex corners can be welded, therefore, in the present application, when welding the end cover and the shell of the blade battery 200, the four vertex corners exposed by the four vertex avoidance openings 11 can be welded first, and then the long side and short side of the battery end can be peripherally welded. Compared with the related art, this can avoid the top of the four vertex corners as the overlapping position of the long side weld and the short side weld, thereby ensuring the quality of the welds at each vertex corner, that is, it can avoid defects in the welds at each vertex corner to a certain extent, and can reduce the proportion of defective products to a certain extent. At the same time, since each vertex does not need to be repaired or welded, the processing time can also be reduced, thereby improving the processing efficiency.

[0099] In a preferred embodiment, the welding device 300 is used for pre-welding, and the welding device 300 is a laser welding device that performs welding by emitting laser light, and the welding device 300 is electrically connected to a PLC control module so that the PLC control module controls the welding device 300 to perform welding. Figure 5 As shown, the welding device 300 includes a galvanometer 3001, which can control the length and width of the pre-weld point by controlling the swing amplitude and spacing, thereby controlling the penetration depth and width of the weld to ensure that the molten pool metal is sufficient to form a full weld.

[0100] In a preferred embodiment, the width of the pre-weld point is in the range of 0.5mm-1.5mm, which can accommodate a larger assembly gap than the peripheral weld. This is beneficial to reduce the precision requirements of the fixture 1, that is, it is beneficial to reduce the assembly precision requirements during pre-welding, and it is beneficial to increase the compatible range of the assembly gap between the end cover and the shell of the blade battery 200.

[0101] The welding system also includes a peripheral welding device, which is electrically connected to the PLC control module so that after the pre-welding is completed, the peripheral welding device is controlled by the PLC control module to perform peripheral welding on the blade battery 200.

[0102] One of the pre-welding steps in the embodiment of the present application is as follows:

[0103] The PLC control module issues instructions to control the welding device 300 to perform pre-welding according to a specified pre-welding trajectory;

[0104] Step 1: If Figure 6 As shown, the welding device 300 pre-welds the first long side 2005. Fig.12 As shown, eight long side pre-welding points 20013 are formed on the first long side 2005 .

[0105] Step 2: If Figure 7 As shown, the blade battery 200 is rotated 45°, and the welding device 300 performs pre-welding on the second vertex 2002, as shown in FIG. Fig.12 As shown, a vertex pre-welding point 20014 is formed on the second vertex 2002 .

[0106] Step 3: If Figure 8 As shown, the blade battery 200 is rotated 90°, and the welding device 300 performs pre-welding on the third vertex 2003, as shown in FIG. Fig.12 As shown, a vertex pre-welding point 20014 is formed on the third vertex 2003 .

[0107] Step 4: If Fig. 9 As shown, the blade battery 200 is rotated 45°, and the welding device 300 pre-welds the second long side 2006. Fig.12 As shown, eight long side pre-welding points 20013 are formed on the second long side 2006 .

[0108] Step 5: If Fig.10 As shown, the blade battery 200 is rotated 45°, and the welding device 300 performs pre-welding on the fourth vertex 2004. Fig.12 As shown, a vertex pre-welding point 20014 is formed on the fourth vertex 2004 .

[0109] Step 6: If Fig.11 As shown, the blade battery 200 is rotated 90°, and the welding device 300 performs pre-welding on the first vertex 2001. Fig.12 As shown, a vertex pre-welding point 20014 is formed on the first vertex 2001 .

[0110] After pre-welding is completed, Fig.12 As shown, a vertex pre-welding point 20014 is formed at each of the four vertex corners of the battery end of the blade battery 200, and eight long side pre-welding points 20013 are formed on each of the two long sides.

[0111] After the pre-welding is completed, the blade battery 200 is transported to the peripheral welding device, and the PLC control module issues instructions to control the peripheral welding device to perform peripheral welding on the first long side 2005, the first short side 2007, the second long side 2006 and the second short side 2008 in sequence.

[0112] It should be noted that the embodiment of the present application also has a pre-welding step with other edges or vertex angles as the starting point, which will not be elaborated in detail in the present application. When pre-welding, the rotation angle of the blade battery 200 is not limited to the rotation angle in the embodiment of the present application. Specifically, different rotation angles can be selected according to actual conditions, which will not be elaborated in detail in the embodiment of the present application.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A positioning device, characterized in that: include: A clamp (1), the clamp (1) being used to clamp a blade battery (200), the clamp (1) being provided with four vertex avoidance openings (11), the four vertex avoidance openings (11) being used to respectively expose four vertex corners of a battery end of the blade battery (200) so as to allow the four vertex corners to be welded.

2. The positioning device according to claim 1, characterized in that: The clamp (1) comprises a first clamping assembly (12) and a second clamping assembly (13), wherein at least one of the first clamping assembly (12) and the second clamping assembly (13) is a movable clamping assembly that is movably arranged in a direction close to or away from the blade battery (200) to jointly clamp or release the blade battery (200); The first clamping assembly (12) and the second clamping assembly (13) are provided with the vertex corner avoidance opening (11), and / or the vertex corner avoidance opening (11) is surrounded by the first clamping assembly (12) and the second clamping assembly (13).

3. The positioning device according to claim 2, characterized in that: The first clamping assembly (12) is the movable clamping assembly, and the second clamping assembly (13) is a fixed clamping assembly that is fixedly arranged.

4. The positioning device according to claim 2 or 3, characterized in that: The first pressing assembly (12) comprises a first large surface pressing member (121) and a first side surface pressing member (122), wherein the first large surface pressing member (121) is used to press the first large surface (2009) of the blade battery (200), and the first side surface pressing member (122) is used to press the first side surface (20010) of the blade battery (200); and / or, The second pressing assembly (13) comprises a second large surface pressing member (131) and a second side surface pressing member (132), wherein the second large surface pressing member (131) is used to press the second large surface (20011) of the blade battery (200), and the second side surface pressing member (132) is used to press the second side surface (20012) of the blade battery (200).

5. The positioning device according to claim 4, characterized in that: The first pressing assembly (12) comprises the first large surface pressing member (121) and the first side surface pressing member (122); the second pressing assembly (13) comprises the second large surface pressing member (131) and the second side surface pressing member (132); the second large surface pressing member (131) is spaced apart from and arranged opposite to the first large surface pressing member (121); and the second side surface pressing member (132) is spaced apart from and arranged opposite to the first side surface pressing member (122); A vertex avoidance opening (11) is formed between the first large surface pressing piece (121) and the first side surface pressing piece (122), between the second large surface pressing piece (131) and the second side surface pressing piece (132), between the second large surface pressing piece (131) and the first side surface pressing piece (122), and between the second side surface pressing piece (132) and the first large surface pressing piece (121).

6. The positioning device according to claim 5, characterized in that: The first large-surface pressing member (121) is provided with a plurality of first long side welding openings (1211) arranged at intervals along the length direction of the first long side (2005) of the battery end, each of the first long side welding openings (1211) is used to expose a portion of the first long side (2005) so that the exposed portion of the first long side (2005) can be welded; the second large-surface pressing member (131) is provided with a plurality of second long side welding openings arranged at intervals along the length direction of the second long side (2006) of the battery end, each of the second long side welding openings is used to expose a portion of the second long side (2006) so that the exposed portion of the second long side (2006) can be welded; and / or, The first side clamping member (122) is provided with a first short side welding port, and the first short side welding port is used to expose a portion of the first short side (2007) of the battery end so that the exposed portion of the first short side (2007) can be welded. The second side clamping member (132) is provided with a second short side welding port, and the second short side welding port is used to expose a portion of the second short side (2008) of the battery end so that the exposed portion of the second short side (2008) can be welded.

7. The positioning device according to claim 6, characterized in that: The first large surface pressing member (121) is provided with a plurality of first long side welding openings (1211), and the second large surface pressing member (131) is provided with a plurality of second long side welding openings; each of the vertex avoidance openings (11) is used to correspond to the first vertex (2001), the second vertex (2002), the third vertex (2003) and the fourth vertex (2004) of the battery end, respectively; the first vertex (2001), the first long side (2005), the second vertex (2002), the third vertex (2003), the second long side (2006) and the fourth vertex (2004) are sequentially arranged in a first order; The positioning device (100) also includes a rotatable turntable (2), the clamp (1) is arranged on the turntable (2), and the turntable (2) is used to drive the blade battery (200) clamped by the clamp (1) to rotate, so that any one of the first vertex angle (2001), the first long side (2005), the second vertex angle (2002), the third vertex angle (2003), the second long side (2006) and the fourth vertex angle (2004) is used as a starting point, and the first vertex angle (2001), the first long side (2005), the second vertex angle (2002), the third vertex angle (2003), the second long side (2006) and the fourth vertex angle (2004) are welded in sequence according to the first order.

8. The positioning device according to any one of claims 1 to 3, characterized in that: The positioning device (100) further comprises: A protective cover (3) is used to cover the end of the battery, and the protective cover (3) is also used to abut against the end cover of the blade battery (200) to position the length direction of the weld on the blade battery (200).

9. The positioning device according to claim 8, characterized in that: The protective cover (3) is a hollow structure, so that the blade battery (200) clamped by the clamp (1) can be welded.

10. A welding system, characterized in that: include: A welding device (300), wherein the welding device (300) is used for welding a blade battery (200); The positioning device (100) according to any one of claims 1 to 9.

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