Battery welding device

Abstract

The utility model belongs to the technical field of battery processing equipment, and discloses a battery welding device, a fixing assembly, a gas transmission assembly and a gas suction assembly, the fixing assembly comprises a fixing cover plate, the fixing cover plate comprises a cover plate base and an extrusion part which are connected, the cover plate base is provided with a welding cavity, a gas inlet channel, a gas outlet channel and a welding hole for laser to penetrate through, and the gas transmission assembly is arranged in the welding cavity. The air inlet channel, the air outlet channel and the welding hole are respectively communicated with the welding cavity, the extrusion part extrudes the welding connecting piece towards the welding part of the battery, and the welding part of the welding connecting piece and the battery is positioned in the welding cavity; one end of the air inlet channel is provided with an air conveying opening connected with an air conveying pipeline of the air conveying assembly, and the other end of the air inlet channel is provided with an air inlet communicated with the welding cavity. One end of the air outlet channel is provided with an air outlet communicated with the welding cavity, and the other end of the air outlet channel is provided with an exhaust port connected with an air suction pipeline of the air suction assembly. By means of the device, short-distance conveying of protective gas and rapid absorption of smoke dust can be achieved, and therefore the welding quality is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery processing equipment, in particular to a battery welding device. Background Art

[0002] The cylindrical cells of power batteries in the existing industry are usually welded by laser. Compared with resistance welding and ultrasonic welding, laser welding is more efficient. However, since laser welding is a non-contact welding method, a large amount of smoke will be generated during the laser welding process. A large amount of smoke will affect the penetration and stability of the laser and the quality of welding. In traditional operations, in order to reduce the complexity of equipment and reduce the cost of equipment investment, non-sealed operations are usually adopted. The large amount of smoke generated during the welding process is released into the air, which is not conducive to environmental protection and affects the working environment and health of the operators. In addition, sparks will be generated during the welding process, which can easily lead to problems such as excessive temperature or excessive oxidation of the welding surface, affecting the quality of welding. Utility Model Content

[0003] The utility model aims to provide a battery welding device, which can realize the short-distance delivery of protective gas and the rapid absorption of smoke, thereby effectively improving the welding quality.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A battery welding device is provided, comprising a fixing component, a gas delivery component and an air suction component, wherein the fixing component comprises a fixing cover plate, the fixing cover plate comprises a cover plate base and an extrusion portion connected to each other, the cover plate base is provided with a welding cavity, an air inlet channel, an air outlet channel and a welding hole for laser to pass through, the air inlet channel, the air outlet channel and the welding hole are respectively connected to the welding cavity, the extrusion portion squeezes a welding connecting piece toward a welding part of a battery, and a welding part between the welding connecting piece and the battery is located in the welding cavity; a gas delivery port is provided at one end of the air inlet channel, and a gas inlet connected to the welding cavity is provided at the other end of the air inlet channel; a gas outlet connected to the welding cavity is provided at one end of the air outlet channel, and an exhaust port is provided at the other end of the air outlet channel; the gas delivery component comprises a gas delivery pipeline, and a gas delivery end of the gas delivery pipeline is connected to the gas delivery port; the air suction component comprises an exhaust pipeline, and a suction end of the exhaust pipeline is connected to the exhaust port.

[0006] In one embodiment, the air inlet is connected to the welding hole; and / or,

[0007] The air outlet is communicated with the welding hole.

[0008] In one of the embodiments, the cover plate base is further provided with a pressing groove, the extrusion portion is arranged in the pressing groove, and one side of the extrusion portion is in contact with the welding connecting piece.

[0009] In one of the embodiments, the air outlet channel is arranged in the extrusion portion, and the air outlet is arranged on a side where the extrusion portion abuts against the welding connection sheet.

[0010] In one of the embodiments, the fixing assembly further includes a fixing base plate, and a placement groove for placing the battery is provided on a side of the fixing base plate facing the fixing cover plate.

[0011] In one embodiment, the fixing assembly further includes a battery cell positioning seat, which is arranged between the fixed cover plate and the fixed base plate, one side of the battery cell positioning seat is connected to the fixed base plate, and the other side of the battery cell positioning seat is provided with a clamping fixing member for bringing the battery cell positioning seat and the fixed cover plate close to each other.

[0012] In one embodiment, the battery cell positioning seat includes a first positioning seat and a second positioning seat arranged along the second direction, the battery is arranged between the first positioning seat and the second positioning seat, and the first positioning seat and the second positioning seat are respectively abutted against the side of the battery on one side facing the battery.

[0013] In one of the embodiments, the fixing assembly further includes a connecting piece mounting seat, and a mounting groove for mounting the welding connecting piece is provided on a side of the connecting piece mounting seat facing the fixing cover plate.

[0014] In one embodiment, the connecting plate mounting seat includes a first mounting seat and a second mounting seat arranged along a first direction, the battery is arranged between the first mounting seat and the second mounting seat, and the first mounting seat and the second mounting seat are respectively abutted against the side surface of the battery on one side facing the battery.

[0015] In one of the embodiments, the gas delivery component further includes a filter pressure regulating valve, and the filter pressure regulating valve is disposed on the gas delivery pipeline.

[0016] Beneficial effects of the utility model:

[0017] The utility model provides a battery welding device, which is used to fix the battery and the welding connecting piece by setting a fixing component. Specifically, the welding connecting piece is squeezed toward the welding part of the battery by an extrusion part to realize the compression and fixed connection between the welding connecting piece and the battery, and the welding part between the welding connecting piece and the battery is set in the welding cavity of the cover plate base. The laser passes through the welding hole connected to the welding cavity and is irradiated on the welding part between the welding connecting piece and the battery to complete the welding of the welding connecting piece and the battery.

[0018] Furthermore, the cover plate body is also provided with an air inlet channel and an air outlet channel, so that the gas delivery component can input the shielding gas through the air inlet channel, and the air suction component can absorb the smoke and other particles generated during the welding process through the air outlet channel, so as to provide a good environment for welding and improve the welding quality. Furthermore, the shielding gas is input through the air inlet connected to the welding chamber, so as to realize the output of the shielding gas at a close distance, so that the shielding gas output by the gas delivery component can quickly reach the welding point of the battery and the welding connecting piece, so that the surface of the welding point can be quickly cooled, and the sparks can be reduced to improve the welding quality, and the consumption of the shielding gas can be saved to the maximum extent. An air outlet connected to the welding chamber is provided at one end of the air outlet channel, so as to realize the close-range air suction, that is, the smoke and other particles generated at the welding point of the battery and the welding connecting piece in the welding chamber can be quickly absorbed through the air outlet, and quickly discharged from the exhaust port through the air outlet channel, so as to form a local near-vacuum welding environment in the welding chamber, which is conducive to improving the stability of laser penetration and ensuring the quality of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the battery welding device in the utility model;

[0020] Figure 2 It is a schematic diagram of a partial explosion structure of a battery welding device in the utility model;

[0021] Figure 3 It is a structural schematic diagram of a fixed cover plate in the utility model;

[0022] Figure 4 It is a side structural schematic diagram of one side of the fixed cover plate in the utility model;

[0023] Figure 5 yes Figure 4 Schematic diagram of the AA section structure;

[0024] Figure 6 yes Figure 4 Schematic diagram of the BB cross-section structure;

[0025] Figure 7 It is a structural schematic diagram of the fixed cover plate and the extrusion part in the utility model;

[0026] Figure 8 It is a structural schematic diagram of the connecting piece mounting seat in the utility model;

[0027] Fig. 9 It is a structural schematic diagram of the battery core positioning seat in the utility model;

[0028] Fig.10 It is a partial structural schematic diagram of the fixing component in the utility model.

[0029] In the figure:

[0030] 100, fixed cover plate; 110, cover plate base; 111, welding cavity; 112, air inlet channel; 1121, air delivery port; 1122, air inlet; 113, air outlet channel; 1131, air outlet; 1132, air outlet; 114, welding hole; 115, pressing groove; 120, extrusion part; 121, extrusion body; 122, extrusion end; 200, air delivery assembly; 210, air delivery pipeline; 220, filter pressure regulating valve; 300 , suction assembly; 310, suction duct; 320, vacuum generator; 400, fixed base plate; 410, placement groove; 500, connecting piece mounting seat; 510, mounting groove; 520, first mounting seat; 530, second mounting seat; 540, support plate; 600, battery cell positioning seat; 610, first positioning seat; 620, second positioning seat; 630, spring plunger; 700, elbow clamp; 800, battery; 900, welding connecting piece. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] like Figures 1 to 10 As shown, a battery welding device of this embodiment includes a fixing component, a gas delivery component 200 and an air suction component 300, the fixing component includes a fixing cover plate 100, the fixing cover plate 100 includes a cover plate base 110 and an extrusion portion 120 connected to each other, the cover plate base 110 is provided with a welding cavity 111, an air inlet channel 112, an air outlet channel 113 and a welding hole 114 for laser to pass through, the air inlet channel 112, the air outlet channel 113 and the welding hole 114 are respectively connected to the welding cavity 111, the extrusion portion 120 squeezes the welding connecting piece 900 toward the welding part of the battery 800, and the welding connecting piece 900 The welding point with the battery 800 is located in the welding cavity 111; a gas supply port 1121 is provided at one end of the air inlet channel 112, and a gas inlet port 1122 connected to the welding cavity 111 is provided at the other end of the air inlet channel 112; a gas outlet port 1131 connected to the welding cavity 111 is provided at one end of the air outlet channel 113, and an exhaust port 1132 is provided at the other end of the air outlet channel 113; the gas delivery component 200 includes a gas delivery pipeline 210, and the gas delivery end of the gas delivery pipeline 210 is connected to the gas delivery port 1121; the air intake component 300 includes an air intake pipeline 310, and the air intake end of the air intake pipeline 310 is connected to the exhaust port 1132.

[0036] In this embodiment, a fixing assembly is provided to achieve fixation of the battery 800 and the welding connecting piece 900. Specifically, the welding connecting piece 900 is squeezed toward the welding position of the battery 800 by the extrusion portion 120 to achieve a compressed and fixed connection between the welding connecting piece 900 and the battery 800, and the welding point between the welding connecting piece 900 and the battery 800 is provided in the welding cavity 111 of the cover base 110. The laser passes through the welding hole 114 connected to the welding cavity 111 and is irradiated at the welding point between the welding connecting piece 900 and the battery 800, thereby completing the welding of the welding connecting piece 900 and the battery 800.

[0037] Furthermore, the cover base 110 is provided with an air inlet channel 112 and an air outlet channel 113, so that the gas delivery component 200 can input the protective gas through the air inlet channel 112. The air suction component 300 can absorb the smoke and other particles generated during the welding process through the air outlet channel 113, thereby providing a good environment for welding and improving the welding quality. 。

[0038] Furthermore, the shielding gas is input through the air inlet 1122 connected to the welding chamber 111, so that the shielding gas can be output at a short distance, so that the shielding gas output by the gas delivery component 200 can quickly reach the welding point of the battery 800 and the welding connecting piece 900, so that the surface of the welding point can be quickly cooled, and the sparks can be reduced to improve the welding quality, and the consumption of the shielding gas can be saved to the maximum extent. An outlet 1131 connected to the welding chamber 111 is provided at one end of the outlet channel 113 to achieve close-range air suction, that is, the smoke and other particles generated at the welding point of the battery 800 and the welding connecting piece 900 in the welding chamber 111 can be quickly absorbed through the outlet 1131, and quickly discharged from the exhaust port 1132 through the outlet channel 113, forming a local near-vacuum welding environment in the welding chamber 111, which is conducive to improving the stability of laser penetration and ensuring the quality of welding.

[0039] In one embodiment, the air inlet 1122 is connected to the welding hole 114, and / or the air outlet 1131 is connected to the welding hole 114, so that a local near-vacuum welding environment is formed near the welding point of the battery 800 and the welding connecting piece 900 and at the welding hole 114, which is beneficial to avoid excessive oxidation of the welding point of the battery 800 and the welding connecting piece 900. At the same time, the protective gas output from the air outlet 1131 can quickly reach the welding point of the battery 800 and the welding connecting piece 900, cool the surface temperature of the welding point and further reduce sparks to improve the welding quality of the battery 800 and the welding connecting piece 900.

[0040] Furthermore, a large amount of smoke generated during the welding process can also be quickly discharged through the air outlet 1131, reducing the impact of the smoke on the laser penetrating from the welding hole 114 to the welding point of the battery 800 and the welding connecting piece 900, thereby improving the penetration of the laser and improving the welding quality of the battery 800 and the welding connecting piece 900.

[0041] In this embodiment, two welding connecting pieces 900 are provided, and correspondingly, two welding holes 114 are provided. The two side walls of the two welding holes 114 that are relatively far away are respectively provided with air outlets 1131 that are connected to the welding holes 114, so that the air suction assembly 300 can respectively absorb the particles such as smoke in the two welding holes 114. The two side walls of the two welding holes 114 that are relatively close are respectively provided with air inlets 1122 that are connected to the welding holes 114, that is, the air inlet channel 112 is provided between the two welding holes 114 and is respectively provided with air inlets 1122 toward the two welding holes 114, so as to output the protective gas to the positions of the two welding holes 114 respectively.

[0042] Of course, in addition to this embodiment, multiple welding connecting plates 900 and / or multiple welding holes 114 can also be set. As long as the gas delivery component 200 and the air intake component 300 can respectively output protective gas and absorb particles such as smoke, such designs belong to the protection scope of the present utility model.

[0043] In one embodiment, a pressing groove 115 is provided on the cover base 110, and the extrusion part 120 is fixed in the pressing groove 115 by fasteners such as bolts, and one side of the extrusion part 120 is in contact with the welding connecting piece 900. In this embodiment, the extrusion part 120 and the cover base 110 are separated, and the cover base 110 is an insulating cover, and the extrusion part 120 is a metal extrusion part. During the welding operation, the surface temperature of the welding part and the welding connecting piece 900 is high, and the use of a metal extrusion part can effectively resist the high temperature of the welding part and the surface of the welding connecting piece 900. However, if the cover base 110 and the extrusion part 120 are integrally formed of a metal material, it is easy to generate more sparks during the welding process, and there is also a risk of causing a conductive short circuit, so a split design and an insulating cover are adopted. Of course, in addition to this embodiment, the extrusion part 120 can also adopt other high-temperature resistant non-metallic extrusion parts, as long as it can effectively resist the high temperature of the welding part and the surface of the welding connecting piece 900, such a design also belongs to the protection scope of the utility model.

[0044] Furthermore, in this embodiment, the air inlet channel 112 is arranged on the cover plate base 110 of the fixed cover plate 100. In the process that the protective gas enters the air inlet channel 112 from the gas supply port 1121 and is then output from the air inlet port 1122, the protective gas can achieve a certain cooling effect on the fixed cover plate 100 to a certain extent, thereby preventing the fixed cover plate 100 from having an excessively high temperature that affects the overall fixing effect of the fixed component.

[0045] In the prior art, in order to ensure the quality of welding, the battery 800 and the welding connecting piece 900 must be in close contact. However, because the size of the battery 800 and the welding connecting piece 900 is too small, the traditional method can only rely on the flatness control of the welding connecting piece 900 to indirectly improve the closeness of the contact surface between the battery 800 and the welding connecting piece 900. However, the flatness control of the welding connecting piece 900 is difficult and requires high process requirements. In addition, it cannot completely guarantee that the contact surface between the battery 800 and the welding connecting piece 900 is close enough, resulting in the inability to ensure the quality of welding. In this embodiment, if Figure 7As shown, the extrusion part 120 also includes a block-shaped extrusion body 121 and a strip-shaped or flat plate-shaped extrusion end 122, which is then pressed from the top by the fixed cover plate 100 to make the welding connecting piece 900 in close contact with the battery 800, so as to solve the problem of insufficient tightness of the contact surface between the welding connecting piece 900 and the battery 800 in the prior art, and the strip-shaped or flat extrusion end 122 is used to extrude the welding connecting piece 900 to avoid the design of the welding hole 114, so as to avoid the extrusion end 122 blocking the laser penetration welding operation.

[0046] In actual operation, the shape and structure of the extrusion end 122 is not limited to the above-mentioned strip or flat shape. According to different welding operation requirements or different shapes and structures of the welding connecting piece 900, the extrusion end 122 design with different shapes and structures is adopted, such as rod-shaped, claw-shaped or circular ring-shaped, etc. As long as the welding connecting piece 900 and the battery 800 can be pressed and fixed, such designs belong to the protection scope of the present utility model.

[0047] In one embodiment, the air outlet channel 113 is arranged in the extrusion part 120, and the air outlet 1131 is arranged on the side where the extrusion part 120 abuts against the welding connecting piece 900. The air suction operation is started by the air suction component 300, and the particles such as smoke generated at the welding part are sucked in from the air outlet 1131 and discharged through the air outlet channel 113 and the exhaust port 1132. Among them, the gas pipeline 210 outputs the shielding gas toward the welding part, and the air inlet 1122 and the air outlet 1131 of the shielding gas are both arranged adjacent to the welding part, so that the excess shielding gas will also be sucked away by the air outlet 1131, so that the excess shielding gas can achieve a certain degree of cooling effect on the extrusion part 120, avoiding the extrusion part 120 from overheating, softening or deformation, so that the extrusion force of the extrusion part 120 on the welding connecting piece 900 is reduced, thereby affecting the close fit between the welding connecting piece 900 and the battery 800.

[0048] In one embodiment, the fixing assembly further includes a fixing base plate 400, and a placement groove 410 for placing the battery 800 is provided on the side of the fixing base plate 400 facing the fixing cover plate 100. Specifically, the inner diameter of the placement groove 410 is slightly larger than the inner diameter of the battery 800, so that the battery 800 can be placed in the placement groove 410, and the placement groove 410 can achieve a certain fixation and preliminary positioning effect on the battery 800 to prevent the battery 800 from shifting.

[0049] In one embodiment, the fixing assembly further includes a connecting piece mounting seat 500, and a mounting groove 510 for mounting the welding connecting piece 900 is provided on the side of the connecting piece mounting seat 500 facing the fixed cover plate 100. Specifically, the side of the connecting piece mounting seat 500 facing the battery 800 is arranged to fit the outer surface contour of the battery 800, thereby achieving the positioning and supporting function of the battery 800 to a certain extent. In this embodiment, the battery 800 is a cylindrical battery 800, that is, the side of the connecting piece mounting seat 500 facing the battery 800 is set to be an arc surface that fits the surface of the cylindrical battery 800.

[0050] Furthermore, the connecting plate mounting seat 500 includes a first mounting seat 520 and a second mounting seat 530 arranged along a first direction, and the battery 800 is arranged between the first mounting seat 520 and the second mounting seat 530. The first mounting seat 520 and the second mounting seat 530 are respectively abutted against the side of the battery 800 facing the battery 800. The battery 800 is clamped and fixed by the first mounting seat 520 and the second mounting seat 530 to limit the movement of the battery 800 in the first direction, which is beneficial to maintaining the stability of the battery 800 in close contact with the welding connecting plate 900 during the welding process, thereby improving the quality of welding.

[0051] In particular, in this embodiment, the welding hole 114 on the fixed cover plate 100 is set corresponding to the position of the mounting groove 510 on the first mounting seat 520. When performing the welding operation, only the welding operation is performed on the connecting piece on the first mounting seat 520 and the battery 800. Subsequently, the fixed cover plate 100 with the welding hole 114 set corresponding to the position of the mounting groove 510 on the second mounting seat 530 is replaced, and the connecting piece on the second mounting seat 530 and the battery 800 are welded. Of course, in addition to this embodiment, the welding holes 114 set corresponding to the positions of the mounting groove 510 on the first mounting seat 520 and the second mounting seat can also be used on the fixed cover plate 100, so that the welding operation of the connecting pieces on the two welding piece mounting seats can be performed simultaneously. In addition, the welding order of the connecting piece on the first mounting seat 520 and the connecting piece on the second mounting seat 530 is not limited, and can be designed according to the actual processing requirements. Such design schemes all belong to the protection scope of the present utility model.

[0052] Furthermore, if Fig.10As shown, a support plate 540 is provided at the bottom of the connecting piece mounting seat 500, and the support plate 540 is arranged toward the placement groove 410, and the battery 800 is placed on the support plate 540. In some embodiments, since the specifications of the batteries 800 are different, when welding the batteries 800 with a relatively low height, the connecting piece mounting seat 500 with a corresponding height support plate 540 can be used to support the battery 800, so as to realize the processing of batteries 800 of various specifications. Of course, in actual operation, the support plate 540 can also be set on the battery positioning seat 600, or a heightening plate or other structure can be directly set in the placement groove 410. As long as it can achieve a supporting effect on the battery 800 with a relatively low height so that the top of the battery 800 is closely fitted with the welding connecting piece 900, such a design belongs to the protection scope of the present utility model.

[0053] In one embodiment, the fixing assembly further includes a cell positioning seat 600, which is disposed between the fixed cover plate 100 and the fixed bottom plate 400, one side of the cell positioning seat 600 is connected to the fixed bottom plate 400, and the other side of the cell positioning seat 600 is provided with a clamping fixture for bringing the cell positioning seat 600 and the fixed cover plate 100 closer to each other. That is, the fixed cover plate 100 and the fixed bottom plate 400 are pulled closer to each other by the cell positioning seat 600 and the clamping fixture, so that the fixed cover plate 100 and the fixed bottom plate 400 clamp and fix the battery 800 and the welding connecting piece 900 disposed therein, thereby improving the close fit between the battery 800 and the welding connecting piece 900 and improving the quality of welding.

[0054] The battery cell positioning seat 600 abuts against the battery 800 on the side facing the battery 800 to position and fix the battery 800. The battery cell positioning seat 600 includes a first positioning seat 610 and a second positioning seat 620 arranged along the second direction, and the battery 800 is arranged between the first positioning seat 610 and the second positioning seat 620. The first positioning seat 610 and the second positioning seat 620 abut against the side of the battery 800 on the side facing the battery 800, respectively, and the battery 800 is clamped and fixed by the first positioning seat 610 and the second positioning seat 620 to limit the movement of the battery 800 in the second direction, so as to ensure that the battery 800 remains stable during the welding process and improve the quality of welding. In this embodiment, the first direction is arranged perpendicular to the second direction, so that the battery 800 can be effectively fixed and limited in the horizontal direction through the connecting piece mounting seat 500 and the battery cell positioning seat 600. The battery 800 is then fixed and limited in the vertical longitudinal direction by fixing the cover plate 100 and the bottom plate 400, thereby improving the stability of the battery 800 and facilitating the improvement of welding quality.

[0055] Furthermore, the battery cell positioning seat 600 is fixed on the fixed base plate 400, and the connecting piece mounting seat 500 is arranged between the first positioning seat 610 and the second positioning seat 620 and is fixedly connected to the first positioning seat 610 and the second positioning seat 620 respectively. The connecting piece mounting seat 500 is clamped and fixed by the second positioning seat 620 and the second positioning seat 620, so that the battery 800 is fixed and limited in all directions by the fixed cover plate 100, the fixed base plate 400, the connecting piece mounting seat 500 and the battery cell positioning seat 600, so that the overall fixed component structure is stable, thereby ensuring the stability of the battery 800.

[0056] Furthermore, a plurality of spring plungers 630 are provided on the side of the cell positioning seat 600 facing the battery 800. The battery 800 is tightened and fixed by the plurality of spring plungers 630, which can effectively limit the movement of the battery 800, ensure that the battery 800 remains stable during the welding process, and improve the quality of welding.

[0057] In actual application, the clamping fixing member is an elbow clamp 700, through which the fixed cover plate 100 is pulled toward one side of the battery cell positioning seat 600 and the fixed base plate 400, and pressed and fixed on the battery cell positioning seat 600 and the fixed base plate 400, so that the fixed cover plate 100 presses the welding connecting piece 900 downward through the extrusion part 120 and presses and fixes the welding connecting piece 900 on the welding part of the battery 800, thereby improving the close contact between the contact surface of the welding connecting piece 900 and the battery 800, which is beneficial to improving the quality of welding.

[0058] In one embodiment, the gas delivery assembly 200 further includes a filter pressure regulating valve 220, which is disposed on the gas delivery pipeline 210. The filter pressure regulating valve 220 filters the shielding gas to prevent impurities in the shielding gas from affecting the quality of welding. In addition, by adjusting the pressure of the filter pressure regulating valve 220, the output of the shielding gas can be controlled according to the welding situation, thereby further ensuring the quality of welding.

[0059] In one embodiment, the suction assembly 300 further includes a vacuum generator 320, which is connected to the suction pipe 310, and the vacuum generator 320 is used to drive the suction, so as to absorb particles such as smoke generated during welding through the suction pipe 310. Of course, in actual operation, other suction drive structures such as air pumps can also be used, and such designs all belong to the protection scope of the present utility model.

[0060] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A battery welding device, characterized in that: include: A fixing assembly, the fixing assembly comprising a fixing cover plate (100), the fixing cover plate (100) comprising a cover plate base (110) and an extrusion portion (120) connected to each other, the cover plate base (110) being provided with a welding cavity (111), an air inlet channel (112), an air outlet channel (113) and a welding hole (114) for laser to pass through, the air inlet channel (112), the air outlet channel (113) and the welding hole being respectively connected to the welding cavity (111), the extrusion portion (120) directing the welding connecting sheet (900) toward the battery ( The welding portion of the welding connecting piece (900) and the battery (800) is squeezed, and the welding portion between the welding connecting piece (900) and the battery (800) is located in the welding cavity (111); one end of the air inlet channel (112) is provided with a gas delivery port (1121), and the other end of the air inlet channel (112) is provided with an air inlet (1122) connected to the welding cavity (111); one end of the air outlet channel (113) is provided with an air outlet (1131) connected to the welding cavity (111), and the other end of the air outlet channel (113) is provided with an exhaust port (1132); A gas delivery component (200), the gas delivery component (200) comprising a gas delivery pipeline (210), the gas delivery end of the gas delivery pipeline (210) being connected to the gas delivery port (1121); An air intake component (300) comprises an air intake pipe (310), wherein the air intake end of the air intake pipe (310) is connected to the exhaust port (1132).

2. The battery welding device according to claim 1, characterized in that: The air inlet (1122) is in communication with the welding hole (114); and / or, The air outlet (1131) is in communication with the welding hole (114).

3. The battery welding device according to claim 1, characterized in that: The cover plate base (110) is further provided with a pressing groove (115), the extrusion portion (120) is arranged in the pressing groove (115), and one side of the extrusion portion (120) is in contact with the welding connection sheet (900).

4. The battery welding device according to claim 3, characterized in that: The air outlet channel (113) is arranged in the extrusion portion (120), and the air outlet (1131) is arranged on a side where the extrusion portion (120) abuts against the welding connection sheet (900).

5. The battery welding device according to any one of claims 1 to 4, characterized in that: The fixing assembly further comprises a fixing base plate (400), and a placement groove (410) for placing the battery (800) is provided on a side of the fixing base plate (400) facing the fixing cover plate (100).

6. The battery welding device according to claim 5, characterized in that: The fixing assembly further comprises a battery cell positioning seat (600), wherein the battery cell positioning seat (600) is arranged between the fixing cover plate (100) and the fixing base plate (400), one side of the battery cell positioning seat (600) is connected to the fixing base plate (400), and the other side of the battery cell positioning seat (600) is provided with a clamping fixture for bringing the battery cell positioning seat (600) and the fixing cover plate (100) closer to each other.

7. The battery welding device according to claim 6, characterized in that: The battery cell positioning seat (600) comprises a first positioning seat (610) and a second positioning seat (620) arranged along a second direction, the battery (800) is arranged between the first positioning seat (610) and the second positioning seat (620), and the first positioning seat (610) and the second positioning seat (620) are respectively in contact with the side surface of the battery (800) on the side facing the battery (800).

8. The battery welding device according to any one of claims 1 to 4, characterized in that: The fixing assembly further comprises a connecting piece mounting seat (500), and a mounting groove (510) for mounting the welding connecting piece (900) is provided on a side of the connecting piece mounting seat (500) facing the fixing cover plate (100).

9. The battery welding device according to claim 8, characterized in that: The connecting piece mounting seat (500) comprises a first mounting seat (520) and a second mounting seat (530) arranged along a first direction, the battery (800) is arranged between the first mounting seat (520) and the second mounting seat (530), and the first mounting seat (520) and the second mounting seat (530) are respectively in contact with the side surface of the battery (800) on the side facing the battery (800).

10. The battery welding device according to any one of claims 1 to 4, characterized in that: The gas transmission component (200) further comprises a filter pressure regulating valve (220), and the filter pressure regulating valve (220) is arranged on the gas transmission pipeline (210).

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