Positioning device and welding system

Abstract

A positioning device, the positioning device comprising a clamp (1). The clamp (1) is used for clamping a blade battery (200), four top corner clearance openings (11) are formed in the clamp (1), and the four top corner clearance openings (11) are used for exposing four top corners of one battery end part of the blade battery (200), such that the four top corners can be welded. The device can ensure the quality of weld seams at top corners, thereby avoiding defects in the weld seams at the top corners to a certain extent. The present application also relates to a welding system.

Description

Positioning device and welding system

[0001] This disclosure claims priority to a Chinese patent application filed with the Patent Office of China on February 19, 2024, with application number 202420309304.5 and application name “A Positioning Device and Welding System,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of battery production, and in particular to a positioning device and a welding system. Background Art

[0003] In blade battery production, after the battery cells are placed in the shell and the cover is closed, the end caps must be welded to the ends of the shell. Blade batteries typically have a rectangular structure, meaning the ends of the blade batteries are rectangular, consisting of two long sides, two short sides, and four corners, all of which are rounded.

[0004] 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.

[0005] However, since the overlap position of the long side weld and the short side weld is set at the top of the corner, defects may easily appear in the weld at the corner, which may lead to an increase in the proportion of defective products. At the same time, repairing and welding the four corner positions of defective products will also extend the processing time and reduce the processing efficiency. Summary of the Invention

[0006] In view of the above-mentioned deficiencies in the related art, the present disclosure provides a positioning device and a welding system to solve the problem in the related art that defects are easily generated in the welds at the top corners.

[0007] In order to solve the above technical problems, in a first aspect, the present disclosure provides a positioning device, which includes:

[0008] A clamp is used to clamp the blade battery. The clamp is provided with four top corner avoidance openings. The four top corner avoidance openings are used to expose the four top corners of one battery end of the blade battery so that the four top corners can be welded.

[0009] In a possible implementation of the first aspect, the clamp includes a first pressing assembly and a second pressing assembly, at least one of the first pressing assembly and the second pressing assembly is a movable pressing assembly configured to be movably disposed in a direction approaching or away from the blade battery to jointly clamp or release the blade battery;

[0010] The first pressing assembly and the second pressing assembly are provided with the top corner avoidance opening, and / or the top corner avoidance opening is surrounded by the first pressing assembly and the second pressing assembly.

[0011] In a possible implementation of the first aspect, the first clamping assembly is the movable clamping assembly, and the second clamping assembly is a fixed clamping assembly that is fixedly arranged.

[0012] 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;

[0013] and / or,

[0014] The second pressing assembly includes a second large surface pressing member and a second side surface pressing member. The second large surface pressing member is used to press the second large surface of the blade battery, and the second side surface pressing member is used to press the second side surface of the blade battery.

[0015] 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;

[0016] A top corner 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.

[0017] 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 a first long side of the battery end portion, each of the first long-side welding openings being used to expose a portion of the first long side for welding the exposed portion of the first long side, 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 a second long side of the battery end portion, each of the second long-side welding openings being used to expose a portion of the second long side for welding the exposed portion of the second long side;

[0018] and / or,

[0019] A first short side welding port is provided on the first side pressing member, 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 pressing member, 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.

[0020] 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 corner avoidance openings is respectively used to correspond to a first vertex corner, a second vertex corner, a third vertex corner, and a fourth vertex corner of the battery end, and the first vertex corner, the first long side, the second vertex corner, the third vertex corner, the second long side, and the fourth vertex corner are arranged in a first order;

[0021] The positioning device also includes a rotatable turntable, and the clamp is arranged on the turntable. 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 the 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.

[0022] In a possible implementation of the first aspect, the positioning device further includes:

[0023] A protective cover is used to cover the end of the battery. 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.

[0024] In a possible implementation of the first aspect, the protective cover has a hollow structure so that the blade battery clamped by the clamp can be welded.

[0025] In a second aspect, the present disclosure further provides a welding system, the welding system comprising:

[0026] A welding device, the welding device being used for welding blade batteries;

[0027] The positioning device according to any one of the first aspects.

[0028] Compared with the related art, the present disclosure has at least the following beneficial effects:

[0029] In the present disclosure, since the fixture for clamping the blade battery is provided with four vertex avoidance openings, and since the four vertex avoidance openings are used to expose the four vertex corners of a battery end of the blade battery respectively so that the four vertex corners can be welded, in the present disclosure, 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 side and short side of the battery end can be welded peripherally. 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 the vertex corners do not need to be repaired or welded, the processing time can also be reduced, thereby improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] FIG1 is a schematic structural diagram of a positioning device provided in an embodiment of the present disclosure;

[0032] FIG2 is a schematic diagram of a partial structure of a positioning device provided by an embodiment of the present disclosure;

[0033] FIG3 is a schematic diagram of a clamp provided in an embodiment of the present disclosure;

[0034] FIG4 is a schematic diagram of a blade battery provided in an embodiment of the present disclosure;

[0035] FIG5 is a schematic diagram of a welding system provided in an embodiment of the present disclosure;

[0036] FIG6 is a schematic diagram of step 1 of pre-welding of a blade battery according to an embodiment of the present disclosure;

[0037] FIG7 is a schematic diagram of step 2 of pre-welding of a blade battery according to an embodiment of the present disclosure;

[0038] FIG8 is a schematic diagram of step three of pre-welding of a blade battery according to an embodiment of the present disclosure;

[0039] FIG9 is a schematic diagram of step four of pre-welding of a blade battery according to an embodiment of the present disclosure;

[0040] FIG10 is a schematic diagram of step five of pre-welding of a blade battery according to an embodiment of the present disclosure;

[0041] FIG11 is a schematic diagram of step six of pre-welding of a blade battery according to an embodiment of the present disclosure;

[0042] FIG12 is a schematic diagram of a blade battery after pre-welding provided in an embodiment of the present disclosure.

[0043] Explanation of Reference Numerals: 1-clamp; 11-vertex avoidance; 12-first pressing assembly; 121-first large surface pressing member; 1211-first long side welding joint; 122-first side pressing member; 13-second pressing assembly; 131-second large surface pressing member; 132-second side pressing member; 2-rotating disk; 3-protective cover; 100-positioning device; 200-blade battery; 2001-first vertex corner; 2002-second vertex corner; 2003-third vertex corner; 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; 300-welding device; 3001-galvanometer. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0045] In this disclosure, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this disclosure and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0046] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to express a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0047] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0048] Furthermore, the terms "first," "second," etc., are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0049] As described in the background of this disclosure, during blade battery production, after the battery cells are placed in the shell and the cover is closed, the end caps must be welded to the ends of the shell. Blade batteries typically have a rectangular structure, meaning the ends of the blade batteries are rectangular, consisting of two long sides, two short sides, and four corners, all of which are rounded.

[0050] 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.

[0051] However, since the overlap position of the long side weld and the short side weld is set at the top of the corner, defects may easily appear in the weld at the corner, which may lead to an increase in the proportion of defective products. At the same time, repairing and welding the four corner positions of defective products will also extend the processing time and reduce the processing efficiency.

[0052] In view of the above problems, the present disclosure provides a positioning device to solve the problem that defects are easily generated in the welds at the top corners in the related art.

[0053] The technical solution of the present disclosure will be further described below with reference to specific embodiments and accompanying drawings:

[0054] As shown in Figures 1, 2 and 3, 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 the four vertex corners of a battery end of the blade battery 200 so that the four vertex corners can be welded.

[0055] In the present disclosure, since the fixture 1 for clamping the blade battery 200 is provided with four vertex avoidance openings 11, 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, in the present disclosure, 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 welded peripherally. 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 the vertex corners do not need to be repaired or welded, the processing time can also be reduced, thereby improving the processing efficiency.

[0056] For the battery end of the blade battery 200, as shown in Figure 4, the four vertex corners of the battery end are the first vertex corner 2001, the second vertex corner 2002, the third vertex corner 2003 and the fourth vertex corner 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.

[0057] For the clamp 1, further, in a preferred embodiment, as shown in Figures 2 and 3, the clamp 1 includes a first clamping assembly 12 and a second clamping assembly 13, 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.

[0058] A top corner avoidance opening 11 is provided on the first pressing assembly 12 and the second pressing assembly 13 , and / or a top corner avoidance opening 11 is formed between the first pressing assembly 12 and the second pressing assembly 13 .

[0059] 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 moved away from the blade battery 200 so that the blade battery 200 can be installed on or removed from the clamp 1. Therefore, by moving the 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.

[0060] In other embodiments, the clamp 1 may further include three, four, or more pressing assemblies. Alternatively, the clamp 1 may further include a cylinder for the blade battery 200 to enter, and a plurality of elastic claws disposed on the cylinder. When the blade battery 200 enters the cylinder, the elastically deformed elastic claws can jointly clamp the blade battery 200 to position the blade battery 200, and a vertex avoidance opening 11 can be formed between two adjacent claws. The structural form of the clamp 1 is relatively flexible. Specifically, the structural form of the clamp 1 can be specifically designed according to actual usage requirements, and this will not be elaborated in detail in the embodiments of the present disclosure.

[0061] Regarding the types of the first pressing assembly 12 and the second pressing assembly 13 , further, in a preferred embodiment, the first pressing assembly 12 is a movable pressing assembly, and the second pressing assembly 13 is a fixed pressing assembly.

[0062] With such an arrangement, the blade battery 200 can be clamped or released by simply 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, since 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.

[0063] Regarding the structural composition of the first pressing assembly 12 and the second pressing assembly 13, further, as shown in Figures 1, 2 and 3, 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.

[0064] Such a configuration is not only helpful in simplifying the structure of the first pressing assembly 12 and / or the second pressing assembly 13 , but also helpful in reducing the overall weight of the clamp 1 .

[0065] In other embodiments, the first pressing assembly 12 and / or the second pressing assembly 13 may include a pressing member that is L-shaped and is used to press against one large surface and one side surface of the blade battery 200. This configuration can simplify the structure of the clamp 1 and facilitate assembly of the clamp 1.

[0066] Further, as shown in Figures 1, 2 and 3, 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.

[0067] A vertex avoidance opening 11 is formed between the first large surface pressing member 121 and the first side surface pressing member 122, between the second large surface pressing member 131 and the second side surface pressing member 132, 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.

[0068] Configuring 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.

[0069] The top corner avoidance opening 11 formed between the first large surface pressing member 121 and the first side pressing member 122, and between the second large surface pressing member 131 and the second side pressing member 132, respectively constitute the top corner avoidance opening 11 set on the first pressing component 12 and the second pressing component 13, and the top corner avoidance opening 11 formed between the second large surface pressing member 131 and the first side pressing member 122, and between the second side pressing member 132 and the first large surface pressing member 121 constitute the top corner avoidance opening 11 formed between the first pressing component 12 and the second pressing component 13. Such an arrangement not only facilitates the formation of the top corner avoidance opening 11 between the first pressing component 12 and the second pressing component 13, but also facilitates the formation of the top corner avoidance opening 11 on both the first pressing component 12 and the second pressing component 13.

[0070] 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 disclosure, 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 setting of the first large surface clamping member 121 and the first side clamping member 122.

[0071] In other embodiments, the first large-surface pressing member 121 and the first side surface pressing member 122 can also be driven manually. This configuration can simplify the structure of the positioning device 100 and help reduce manufacturing costs.

[0072] Regarding the formation of the top corner avoidance openings 11, in other embodiments, both the first large surface pressing member 121 and the second large surface pressing member 131 are provided with two notches, each of which constitutes a top corner avoidance opening 11. Alternatively, both the first side surface pressing member 122 and the second side surface pressing member 132 are provided with two notches, each of which constitutes a top corner avoidance opening 11. Therefore, the formation of the top corner avoidance openings 11 is relatively flexible and can be specifically selected according to actual conditions, and will not be further elaborated in the present disclosed embodiments.

[0073] Furthermore, as shown in FIG2 , 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 portion, each first long side welding opening 1211 being used to expose a portion of the first long side 2005 for welding the exposed portion of the first long side 2005, 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 portion, each second long side welding opening being used to expose a portion of the second long side 2006 for welding the exposed portion of the second long side 2006;

[0074] and / or,

[0075] A first short side welding port is provided on the first side clamping member 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 member 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.

[0076] With such an arrangement, when pre-welding the blade battery 200, through each long side welding joint and / or each short side welding joint, not only can multiple pre-welding points be conveniently welded 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.

[0077] Furthermore, in a preferred embodiment, as shown in FIG2 , a plurality of first long side welding openings 1211 are provided on the first large surface pressing member 121, and a plurality of second long side welding openings (not shown) are provided on the second large surface pressing member 131. Each vertex corner avoidance opening 11 is respectively used to correspond to the first vertex corner 2001, the second vertex corner 2002, the third vertex corner 2003, and the fourth vertex corner 2004 of the battery end. The first vertex corner 2001, the first long side 2005, the second vertex corner 2002, the third vertex corner 2003, the second long side 2006, and the fourth vertex corner 2004 are arranged in the first order.

[0078] As shown in Figure 1, the positioning device 100 also includes a rotatable turntable 2, and the clamp 1 is set 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.

[0079] Since the long side is relatively longer than the short side, multiple long side welding joints are set on each large surface clamping part, so that each long side can have multiple pre-welding points, thereby enhancing the welding connection effect between the end cover and the shell in the blade battery 200, which is beneficial to ensuring the quality of the peripheral weld between the end cover and the shell, and helping to avoid defects in the weld.

[0080] During pre-welding, the blade battery 200 clamped by the fixture 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 reducing the pre-welding time and thus beneficial to improving the pre-welding efficiency.

[0081] In a preferred embodiment, as shown in Figure 2, the first large-surface pressing member 121 is provided with eight first long-side welding openings 1211, and the second large-surface pressing member 131 is provided with eight second long-side welding openings. This arrangement results in a relatively large number of long-side welding openings on both the first large-surface pressing member 121 and the second large-surface pressing member 131, thereby providing a large number of pre-welded points on each long side, thereby facilitating a good weld connection between the end cap and the housing of the blade battery 200.

[0082] 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 can be one of an electric cylinder, a hydraulic cylinder and a pneumatic cylinder.

[0083] When performing pre-welding, while the turntable 2 drives the blade battery 200 to rotate, it is optimal 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. Alternatively, 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. This facilitates the pre-welding of the blade battery 200.

[0084] As shown in Figures 1 and 3, 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.

[0085] Such a setting not only can protect the end cover of the blade battery through the protective cover 3 provided on the end of the battery, but also can ensure the extension direction of the weld length by positioning the weld seam on the blade battery 200 in the length direction through the protective cover 3, which is beneficial to ensure the quality of the weld seam.

[0086] Furthermore, as shown in FIG1 and FIG3 , the protective cover 3 has a hollow structure so that the blade battery 200 clamped by the clamp 1 can be welded.

[0087] 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 ends covered by the protective cover 3 , thereby facilitating welding of the battery ends.

[0088] In a preferred embodiment, the protective cover 3 is disposed on the turntable 2 , which facilitates the placement of the protective cover 3 in the positioning device 100 .

[0089] In a preferred embodiment, the positioning device 100 also includes a pushing drive, a negative pressure dust removal assembly and a PLC control module. Among them, the pushing drive is used to push the blade battery 200 so that the blade battery 200 enters the fixture 1. The pushing 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 conducive to optimizing the working environment and ensuring the health of the workers. The PLC control module is electrically connected to the pushing drive, the turntable drive and each clamping drive to facilitate control of the start and shut down of each drive.

[0090] The present disclosure also provides a welding system, as shown in Figure 5, which 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.

[0091] In the present disclosure, since the fixture 1 for clamping the blade battery 200 is provided with four vertex avoidance openings 11, 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, in the present disclosure, 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 welded peripherally. 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 the vertex corners do not need to be repaired or welded, the processing time can also be reduced, thereby improving the processing efficiency.

[0092] In a preferred embodiment, the welding device 300 is used for pre-welding and is a laser welding device that performs welding by emitting laser light. 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. As shown in Figure 5, the welding device 300 includes a galvanometer 3001. The galvanometer 3001 can control the length and width of the pre-weld point by controlling the oscillation amplitude and spacing, thereby controlling the penetration depth and width of the weld, ensuring sufficient molten pool metal to form a full weld.

[0093] 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 seam. This is conducive to reducing the precision requirements of the fixture 1, that is, it is conducive to reducing the assembly precision requirements during pre-welding, and is conducive to increasing the compatible range of the assembly gap between the end cover and the shell of the blade battery 200.

[0094] 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.

[0095] One of the pre-welding steps in the embodiment of the present disclosure is as follows:

[0096] The PLC control module issues instructions to control the welding device 300 to perform pre-welding according to the specified pre-welding trajectory;

[0097] Step 1: As shown in FIG. 6 , the welding device 300 performs pre-welding on the first long side 2005 . As shown in FIG. 12 , eight long side pre-welding points 20013 are formed on the first long side 2005 .

[0098] Step 2: As shown in FIG7 , the blade battery 200 is rotated 45°, and the welding device 300 pre-welds the second vertex 2002 . As shown in FIG12 , a vertex pre-welding point 20014 is formed on the second vertex 2002 .

[0099] Step three: As shown in FIG8 , the blade battery 200 is rotated 90°, and the welding device 300 pre-welds the third vertex 2003 . As shown in FIG12 , a vertex pre-welding point 20014 is formed on the third vertex 2003 .

[0100] Step 4: As shown in FIG9 , the blade battery 200 is rotated 45°, and the welding device 300 pre-welds the second long side 2006 . As shown in FIG12 , eight long side pre-welding points 20013 are formed on the second long side 2006 .

[0101] Step 5: As shown in FIG10 , the blade battery 200 is rotated 45°, and the welding device 300 pre-welds the fourth vertex 2004 . As shown in FIG12 , a vertex pre-welding point 20014 is formed on the fourth vertex 2004 .

[0102] Step six: As shown in FIG11 , the blade battery 200 is rotated 90°, and the welding device 300 pre-welds the first vertex 2001 . As shown in FIG12 , a vertex pre-welding point 20014 is formed on the first vertex 2001 .

[0103] After the pre-welding is completed, as shown in FIG12 , a corner pre-welding point 20014 is formed at each of the four 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.

[0104] 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.

[0105] It should be noted that the disclosed embodiment also includes a pre-welding step using other edges or corners as the starting point, which is not further elaborated in this disclosure. During pre-welding, the rotation angle of the blade battery 200 is not limited to the rotation angle in the disclosed embodiment. Specifically, different rotation angles can be selected based on actual conditions, which is not further elaborated in this disclosed embodiment.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure 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 disclosure.

Claims

1. A positioning device, characterized in that: include: A clamp (1) is used to clamp a blade battery (200), and four vertex avoidance openings (11) are provided on the clamp (1). The four vertex avoidance openings (11) are used to respectively expose four vertex corners of a battery end of the blade battery (200) so that the four vertex corners can be welded.

2. The positioning device according to claim 1, characterized in that The clamp (1) comprises a first pressing assembly (12) and a second pressing assembly (13), wherein at least one of the first pressing assembly (12) and the second pressing assembly (13) is a movable pressing 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 pressing assembly (12) and the second pressing assembly (13) are provided with the top corner avoidance opening (11), and / or the top corner avoidance opening (11) is surrounded by the first pressing assembly (12) and the second pressing assembly (13).

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

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) includes the first large-surface pressing member (121) and the first side pressing member (122); the second pressing assembly (13) includes the second large-surface pressing member (131) and the second side 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 pressing member (132) is spaced apart from and arranged opposite to the first side pressing member (122); A top corner avoidance opening (11) is formed between the first large surface pressing member (121) and the first side pressing member (122), between the second large surface pressing member (131) and the second side pressing member (132), between the second large surface pressing member (131) and the first side pressing member (122), and between the second side pressing member (132) and the first large surface pressing member (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) spaced apart along the length direction of the first long side (2005) of the battery end, each of the first long side welding openings (1211) being 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 spaced apart along the length direction of the second long side (2006) of the battery end, each of the second long side welding openings being 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 pressing 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 pressing 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 arranged in the first order; The positioning device (100) further 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 (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 a 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 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 provided for covering the end of the battery, and the protective cover (3) is also used for abutting 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), the welding device (300) being used for welding blade batteries (200); The positioning device (100) according to any one of claims 1 to 9.

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