Welding aid, welding system and welding method

Abstract

The application discloses a welding auxiliary device, a welding system and a welding method. The welding auxiliary device comprises a mounting frame, a pole positioning piece arranged on the mounting frame, and a bearing mechanism arranged on the mounting frame. The bearing mechanism comprises a carrier arranged opposite to the pole positioning piece. The carrier is provided with a bearing surface arranged opposite to the pole positioning piece. The inside of the carrier is provided with a gas passage. The gas outlet of the gas passage penetrates through the bearing surface. The welding auxiliary device is provided with a gas filling mechanism for filling gas into the gas passage. The bearing surface is used for placing a battery semi-finished product, so that the center hole of the battery cell of the battery semi-finished product is opposite to the gas outlet of the gas passage. The pole positioning piece can be pressed on the pole of the battery semi-finished product. After the welding operation of the current collecting disc and the pole is completed, the welding auxiliary device can reduce the risk of false welding or poor welding, and improve the welding quality.

Description

Technical Field

[0001] This invention relates to the field of battery welding technology, and in particular to a welding auxiliary device, welding system, and welding method. Background Technology

[0002] A cylindrical battery typically includes a casing, a cell housed inside the casing, a current collector at the end of the cell, and terminals welded to the current collector. Welding the terminals to the current collector is a crucial step in the manufacturing process of a cylindrical battery.

[0003] Currently, laser welding technology is commonly used for welding the electrode post and the current collector. In the traditional method, a mechanical mechanism is usually used to pre-tighten the electrode post end face before welding the electrode post and the current collector. However, this method has limited effect on pre-pressurizing and tightening the electrode post and the current collector, and problems such as incomplete welding and weak welding are likely to occur during subsequent welding. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a welding auxiliary device that can improve the welding quality of the electrode post and the manifold.

[0005] The present invention also proposes a welding system having the above-mentioned welding auxiliary device.

[0006] The present invention also proposes a welding method applicable to the above-mentioned welding system.

[0007] According to a first aspect of the present invention, a welding auxiliary device includes: a mounting frame; an electrode positioning member disposed on the mounting frame; a bearing mechanism disposed on the mounting frame, the bearing mechanism including a carrier disposed opposite to the electrode positioning member, the carrier having a bearing surface disposed opposite to the electrode positioning member, the carrier having a gas channel inside, the gas channel having an outlet penetrating the bearing surface; and an inflation mechanism for inflating gas into the gas channel.

[0008] The bearing surface is used to place the battery semi-finished product so that the center hole of the battery cell of the battery semi-finished product is opposite to the gas outlet of the gas channel; the terminal positioning member can press on the terminal of the battery semi-finished product.

[0009] The welding auxiliary device according to embodiments of the present invention has at least the following beneficial effects:

[0010] When using the welding auxiliary device of the present invention: First, the battery semi-finished product is placed on the bearing surface of the carrier, and the center hole of the battery cell of the battery semi-finished product is aligned with the gas outlet of the gas channel; then, the electrode positioning component is brought into contact with the electrode of the battery semi-finished product, thereby achieving the positioning of the battery semi-finished product; after that, the gas filling mechanism fills the gas channel with gas so that the current collector of the battery semi-finished product is in close contact with the electrode of the battery semi-finished product.

[0011] The welding auxiliary device of the present invention can not only position the battery semi-finished product, but also make the current collector and the terminal post of the battery semi-finished product fit tightly. After the welding operation of the current collector and the terminal post is completed, the risk of incomplete welding or weak welding can be reduced and the welding quality can be improved.

[0012] It should be noted that in the welding auxiliary device of the present invention, the gas is used to apply pressure to the collector plate so that the collector plate is in close contact with the electrode post, which has the advantages of being clean, efficient and pollution-free. In addition, the gas pressure of the gas injected into the gas channel can be adjusted according to the thickness and material of the collector plate, which has good adaptability. Furthermore, after the gas is injected into the center hole of the battery cell, there is no problem of scratching the battery cell, which makes it more reliable.

[0013] According to some embodiments of the present invention, the carrier further includes a positioning part connected to the bearing surface, the positioning part forming a positioning space, the positioning space being used for the battery semi-finished product to pass through and for the central hole of the battery cell of the battery semi-finished product to be positioned opposite to the gas outlet of the gas channel.

[0014] According to some embodiments of the present invention, the distance between the carrier and the pole positioning member is variable.

[0015] According to some embodiments of the present invention, the welding auxiliary device further includes a driving mechanism, which is drivenly connected to the carrier and is capable of driving the carrier to move along a first direction or a second direction opposite to the first direction, wherein the first direction is the direction from the carrier to the pole positioning member;

[0016] The drive mechanism can apply a force to the carrier so that the terminal of the battery semi-finished product placed on the carrier abuts against the terminal positioning member.

[0017] According to some embodiments of the present invention, the pole positioning member is fixed on the mounting bracket; or,

[0018] A pressure plate is fixedly installed on the mounting bracket. The pressure plate is located on the side of the pole positioning member away from the carrier. The pole positioning member is movable between the pressure plate and the carrier.

[0019] According to some embodiments of the present invention, the driving mechanism includes a driving source and a transmission member drivenly connected to the driving source, wherein the driving source is capable of driving the transmission member to move along the first direction or the second direction;

[0020] The bearing mechanism further includes an elastic element, and the transmission element is disposed on the side of the carrier away from the pole positioning element and supports the elastic element, and the elastic element abuts against the carrier.

[0021] According to some embodiments of the present invention, the bearing mechanism further includes a mounting base and a base, the mounting base being disposed on the side of the carrier away from the pole positioning member, the elastic member abutting against the mounting base, the base being sleeved outside the mounting base, and the transmission member supporting the base and connecting to the base;

[0022] The base is configured to: be driven by the transmission member to move the mounting base along the first direction, and be driven by the transmission member to move along the first direction when the transmission member moves along the first direction and the mounting base is restricted from moving along the first direction.

[0023] According to some embodiments of the present invention, the pole positioning member is provided with a clearance through hole disposed opposite to the gas outlet of the gas channel.

[0024] According to a second aspect of the present invention, a welding system includes: the welding auxiliary device described above; and a welding device for welding together a current collector and a terminal post of a battery semi-finished product fixed on the welding auxiliary device.

[0025] The welding system according to embodiments of the present invention has at least the following beneficial effects:

[0026] The welding system of the present invention can not only position the battery semi-finished product, but also make the current collector and the terminal post of the battery semi-finished product fit tightly. After completing the welding operation of the current collector and the terminal post, the risk of incomplete welding or weak welding can be reduced, and the welding quality can be improved.

[0027] According to a third aspect of the present invention, a welding method is applied to the above-described welding system, the welding method comprising:

[0028] The battery semi-finished product is placed on the bearing surface, and the center hole of the battery cell of the battery semi-finished product is opposite to the gas outlet of the gas channel;

[0029] The terminal post of the battery semi-finished product abuts against the terminal post positioning component;

[0030] The inflation mechanism fills the gas channel with gas so that the current collector of the battery semi-finished product is in close contact with the terminal post of the battery semi-finished product.

[0031] The welding device welds the manifold and the pole together.

[0032] The welding method of the present invention can not only position the battery semi-finished product, but also make the current collector and the terminal post of the battery semi-finished product fit tightly. After completing the welding operation of the current collector and the terminal post, the risk of incomplete welding or weak welding can be reduced, and the welding quality can be improved.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0035] Figure 1 This is a cross-sectional view of a semi-finished battery.

[0036] Figure 2 This is a three-dimensional structural schematic diagram of a welding auxiliary device according to an embodiment of the present invention;

[0037] Figure 3 This is a side view of a welding auxiliary device according to an embodiment of the present invention;

[0038] Figure 4 This is a partial cross-sectional view of a welding auxiliary device according to an embodiment of the present invention;

[0039] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0040] Figure 6 This is a schematic diagram of the welding system according to an embodiment of the present invention.

[0041] Icon labels:

[0042] 10. Welding auxiliary device; 11. Mounting frame; 111. Base plate; 112. Stand; 113. Diagonal support; 12. Bearing mechanism; 121. Carrier; 1211. Gas passage; 1212. Bearing surface; 1213. Positioning part; 122. Connector; 123. Mounting seat; 1231. Mounting hole; 124. Elastic element; 125. Base; 1251. Step; 126. Bushing; 127. Limiting element; 13. Pole post positioning element; 131. Positioning groove; 132. Clearance through hole; 133. Pole post supporting part; 134. Guide hole; 135. Linear bearing; 14. Drive mechanism; 141. Transmission element; 15. Pressure plate; 151. Through hole; 16. First fine-tuning mechanism; 161. Mounting block; 162. Adjusting screw; 17. Second fine-tuning mechanism; 18. Guide rod; 19. Pressure sensor;

[0043] 20. Welding apparatus; 21. Slide; 22. Laser collimator; 23. Galvanometer; 24. Field lens;

[0044] 30. Battery semi-finished product; 31. Battery cell; 311. Center hole; 32. Terminal post; 33. Current collector; 34. Tab. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] Figure 1 A battery semi-finished product 30 is shown, which includes a battery cell 31, a tab 34 disposed at the end of the battery cell 31, a current collector 33 disposed on the side of the tab 34 away from the battery cell 31, and a terminal post 32 disposed on the side of the current collector 33 away from the tab 34.

[0049] As described in the background art, when welding the terminal post 32 of the battery semi-finished product 30 using traditional methods, there are often problems with incomplete welding or weak welding. The main reason is that after the end face of the cell 31 is flattened, the tab 34 becomes a shape that is low in the middle and high at both ends. When welding the terminal post 32 to the current collector 33, the center part of the current collector 33 is suspended without support, and the current collector 33 and the terminal post 32 are not tightly attached, which will cause problems with incomplete welding or weak welding after the welding is completed.

[0050] In view of the above problems, the present invention provides a welding auxiliary device 10.

[0051] Figure 2 The welding auxiliary device 10 of an embodiment of the present invention is shown, including a mounting frame 11, a pole positioning member 13, a bearing mechanism 12, and an air inflation mechanism (not shown).

[0052] Mounting bracket 11 is the main load-bearing component, used to install other parts of welding auxiliary device 10.

[0053] The pole positioning component 13 is mounted on the mounting bracket 11.

[0054] Combination Figure 2 , Figure 4 and Figure 5 The pole positioning member 13 is provided with a pole holding part 133, which is used to hold the pole 32, thereby positioning the pole 32.

[0055] Combination Figure 2 and Figure 4 The support mechanism 12 is disposed on the mounting frame 11. The support mechanism 12 includes a carrier 121 disposed opposite to the terminal positioning member 13. The carrier 121 is used to support the battery semi-finished product 30.

[0056] like Figure 4As shown, specifically, the carrier 121 is provided with a bearing surface 1212, which is disposed opposite to the terminal positioning member 13. The bearing surface 1212 is used to support the battery semi-finished product 30. In other words, the battery semi-finished product 30 can be directly placed on the bearing surface 1212 to be supported by the carrier 121.

[0057] The carrier 121 has an internal gas channel 1211, and the gas outlet of the gas channel 1211 penetrates the bearing surface 1212.

[0058] Specifically, when the battery semi-finished product 30 is placed on the bearing surface 1212, the center hole 311 of the cell 31 of the battery semi-finished product 30 is aligned with the outlet of the gas channel 1211. Furthermore, when the battery semi-finished product 30 is placed on the bearing surface 1212, the terminal positioning member 13 is pressed onto the terminal 32 of the battery semi-finished product 30 to position the terminal 32, thereby positioning the entire battery semi-finished product 30.

[0059] like Figure 4 As shown, in some embodiments, the carrier 121 further includes a positioning part 1213 connected to the bearing surface. The positioning part 1213 surrounds and forms a positioning space. The positioning space is used for the battery semi-finished product 30 to pass through and for the central hole 311 of the cell 31 of the battery semi-finished product 30 to be positioned opposite to the gas outlet of the gas channel 1211.

[0060] Specifically, the battery semi-finished product 30 can be first placed into the positioning space and then placed on the supporting surface 1212. After the battery semi-finished product 30 is placed, its bottom is positioned by the supporting surface 1212, and its sides are positioned by the positioning part 1213. After the battery semi-finished product 30 is accurately positioned, the center hole 311 of the cell 31 can be aligned with the outlet of the gas channel 1211. In this way, the placement efficiency of the battery semi-finished product 30 can be improved.

[0061] Among them, the battery semi-finished product 30 has a columnar structure and the positioning part 1213 has a ring-shaped structure. After the battery semi-finished product 30 is placed in the positioning space, the positioning part 1213 positions the battery semi-finished product 30, reducing the risk of the battery semi-finished product 30 being displaced in the radial direction.

[0062] Combination Figure 4 and Figure 5 Furthermore, the pole positioning component 13 is provided with a positioning groove 131 on the side near the carrier 121. The positioning groove 131 is used to position the battery semi-finished product 30, thereby ensuring the positioning accuracy of the battery semi-finished product 30 and the pole positioning component 13.

[0063] like Figure 4As shown, the inflation mechanism is used to inflate gas into the gas channel 1211. Specifically, the inflation mechanism can inflate gas into the gas channel 1211, and the gas inflated into the gas channel 1211 can be discharged from the outlet of the gas channel 1211.

[0064] The air inlet of the gas channel 1211 penetrates the side wall of the vehicle 121, and the inflation mechanism can fill the gas channel 1211 with gas through the air inlet of the gas channel 1211.

[0065] Furthermore, the supporting mechanism 12 also includes a connector 122 passing through the air inlet of the gas channel 1211, and the inflation mechanism is connected to the connector 122.

[0066] Specifically, an air tube is connected between the inflation mechanism and the connector 122, so that the inflation mechanism can inflate gas into the gas channel 1211 through the air tube.

[0067] Of course, in other embodiments, the connector 122 may not be provided; simply insert the end of the air tube away from the inflation mechanism into the air inlet of the gas channel 1211.

[0068] The inflation mechanism can be an air pump, and the gas injected into the gas channel 1211 by the inflation mechanism can be air. Of course, the gas injected into the gas channel 1211 is not limited to air, and can also be other gases.

[0069] Combination Figure 2 and Figure 4 When using the welding auxiliary device 10 of the present invention: First, the battery semi-finished product 30 is placed on the bearing surface 1212 of the carrier 121, and the center hole 311 of the cell 31 of the battery semi-finished product 30 is aligned with the gas outlet of the gas channel 1211; then, the electrode positioning member 13 is brought into contact with the electrode 32 of the battery semi-finished product 30, thereby achieving the positioning of the battery semi-finished product 30; after that, the gas filling mechanism fills the gas channel 1211 with gas so that the collector 33 of the battery semi-finished product 30 is in close contact with the electrode 32 of the battery semi-finished product 30.

[0070] By using the welding auxiliary device 10 of the present invention, the battery semi-finished product 30 can be positioned, and the current collector 33 of the battery semi-finished product 30 can be made to fit tightly with the terminal post 32. After completing the welding operation of the current collector 33 and the terminal post 32, the risk of incomplete welding or weak welding can be reduced, and the welding quality can be improved.

[0071] It should be noted that in the welding auxiliary device 10 of the present invention, the gas is used to apply pressure to the collector plate 33 so that the collector plate 33 is in close contact with the pole post 32. This has the advantages of being clean, efficient and pollution-free. In addition, the gas pressure of the gas injected into the gas channel 1211 can be adjusted according to the thickness and material of the collector plate 33, which has good adaptability. Furthermore, after the gas is injected into the center hole 311 of the battery cell 31, there is no problem of scratching the battery cell 31, which makes it more reliable.

[0072] Understandably, before the inflation mechanism inflates the gas channel 1211, the battery semi-finished product 30 is already positioned by the carrier 121 and the terminal positioning member 13. When the inflation mechanism inflates the gas channel 1211 and allows the gas to enter the central hole 311 of the cell 31, it can prevent the battery semi-finished product 30 from being blown away and affecting the subsequent welding accuracy. Furthermore, since the terminal positioning member 13 can position the terminal 32, it can also prevent the gas entering the central hole 311 of the cell 31 from blowing the terminal 32 away.

[0073] like Figure 4 As shown, in some embodiments, the distance between the pole positioning member 13 and the carrier 121 is variable, which facilitates the handling of the battery semi-finished product 30.

[0074] Specifically, the carrier 121 is used to carry the battery semi-finished product 30, and the carrier 121 can be operated to approach or move away from the terminal positioning member 13, and / or the terminal positioning member 13 can be operated to approach or move away from the carrier 121.

[0075] Understandably, before placing the battery semi-finished product 30 on the carrier 121, the distance between the carrier 121 and the terminal positioning member 13 can be adjusted so that the battery semi-finished product 30 can be smoothly placed on the carrier 121. After the battery semi-finished product 30 is placed on the carrier 121, the distance between the carrier 121 and the terminal positioning member 13 can also be adjusted so that the battery semi-finished product 30 is pressed tightly between the carrier 121 and the terminal positioning member 13.

[0076] like Figure 2 , Figure 3 As shown, in some embodiments, the welding auxiliary device 10 further includes a drive mechanism 14, which is drivenly connected to the carrier 121. The drive mechanism 14 can drive the carrier 121 to move along a first direction or a second direction opposite to the first direction, wherein the first direction is from the carrier 121 to the terminal positioning member 13; and the drive mechanism 14 can apply a force to the carrier 121 so that the terminal 32 of the battery semi-finished product 30 placed on the carrier 121 abuts against the terminal positioning member 13.

[0077] Understandably, the drive mechanism 14 can apply force to the carrier 121, thereby causing the carrier 121 to squeeze the battery semi-finished product 30, thereby causing the terminal post 32 of the battery semi-finished product 30 to abut against the terminal post positioning member 13, thereby achieving the positioning of the battery semi-finished product 30.

[0078] like Figure 2 , Figure 3 As shown, in some embodiments, a pressure plate 15 is fixedly disposed on the mounting bracket 11. The pressure plate 15 is located on the side of the pole positioning member 13 away from the carrier 121. The pole positioning member 13 is movable between the pressure plate 15 and the carrier 121. When the driving mechanism 14 drives the carrier 121 to move in the first direction, the carrier 121 gradually moves closer to the pressure plate 15. When the driving mechanism 14 drives the carrier 121 to move in the second direction, the carrier 121 gradually moves away from the pressure plate 15.

[0079] Before placing the battery semi-finished product 30 on the carrier 121, the distance between the carrier 121 and the terminal positioning member 13 can be adjusted so that the battery semi-finished product 30 can be smoothly placed on the carrier 121. After the battery semi-finished product 30 is placed on the carrier 121, the terminal positioning member 13 can directly rest on the side of the battery semi-finished product 30 away from the carrier 121. Then, the drive mechanism 14 can drive the carrier 121 to move towards the pressure plate 15. When the terminal positioning member 13 abuts against the pressure plate 15, the terminal positioning member 13 is restricted from further movement. At this time, under the action of the drive mechanism 14, the battery semi-finished product 30 can be pressed between the carrier 121 and the terminal positioning member 13, thereby achieving the positioning of the battery semi-finished product 30. After the welding operation of the terminal 32 and the collector plate 33 is completed, the drive mechanism 14 can drive the carrier 121 away from the pressure plate 15 again, thereby releasing the battery semi-finished product 30 so that the battery semi-finished product 30 can be taken out.

[0080] Among them, a pressure sensor 19 is provided on the side of the pole positioning member 13 away from the carrier 121. The pole positioning member 13 can indirectly abut against the pressure plate 15 through the pressure sensor 19. The drive mechanism 14 can drive the bearing mechanism 12 and the pole positioning member 13 to move together along the first direction until the pressure sensor 19 abuts against the pressure plate 15, so that the magnitude of the lifting force can be obtained through the pressure sensor 19.

[0081] Furthermore, the mounting frame 11 includes a base plate 111 and a stand 112 disposed on the base plate 111, a pressure plate 15 disposed on the stand 112, and the pressure plate 15 is located on the side of the pole positioning member 13 away from the carrier 121.

[0082] Furthermore, the mounting frame 11 also includes an inclined support 113 disposed on the base plate 111 and supporting the upright frame 112. The inclined support 113 is used to support the upright frame 112, thereby improving the stability of the upright frame 112 and reducing the risk of the upright frame 112 tipping over.

[0083] Furthermore, the welding auxiliary device 10 also includes a guide rod 18 that is driven and connected to the drive mechanism 14, a linear bearing 135 that is fixedly connected to the pole positioning member 13, and a guide hole 134 that is opposite to the linear bearing 135. The guide rod 18 passes through the linear bearing 135 and the guide hole 134.

[0084] Understandably, the movement accuracy of the pole positioning component 13 can be further improved under the action of the guide rod 18. When no external force is applied, the pole positioning component 13 automatically descends under the action of gravity, and the pole positioning component 13 can also rise under the action of external force.

[0085] like Figure 2 , Figure 3 As shown, the base plate 111 is provided with a first fine-tuning mechanism 16 and a second fine-tuning mechanism 17. The first fine-tuning mechanism 16 is used to adjust the left and right position of the upright frame 112, and the second fine-tuning mechanism 17 is used to adjust the front and back direction of the upright frame 112, thereby adjusting the position of the pressure plate 15 and ensuring the installation accuracy of the pressure plate 15.

[0086] Specifically, a first fine-tuning mechanism 16 is provided on the left and / or right sides of the upright frame 112. The first fine-tuning mechanism 16 includes a mounting block 161 and an adjusting screw 162. The mounting block 161 is fixed on the base plate 111 and has a screw hole. The adjusting screw 162 passes through the screw hole and is threadedly connected to the base plate 111. By rotating the adjusting screw 162, the position of the upright frame 112 can be changed.

[0087] Furthermore, a second fine-tuning mechanism 17 is provided at the front and rear and / or rear side of the support frame 112, and the structure of the second fine-tuning mechanism 17 is the same as that of the first fine-tuning mechanism 16.

[0088] You can refer to Figure 2 and Figure 3 In other embodiments, the pole positioning member 13 is fixedly mounted on the mounting bracket 11, and the drive mechanism 14 can drive the carrier 121 to move along a first direction or a second direction. When the drive mechanism 14 drives the carrier 121 along the first direction, the carrier 121 gradually approaches the pole positioning member 13. When the drive mechanism 14 drives the carrier 121 to move along the second direction, the carrier 121 gradually moves away from the pole positioning member 13.

[0089] Before placing the battery semi-finished product 30 on the carrier 121, the distance between the carrier 121 and the terminal positioning member 13 can be adjusted by the drive mechanism 14 so that the battery semi-finished product 30 can be smoothly placed on the carrier 121. After the battery semi-finished product 30 is placed on the carrier 121, the drive mechanism 14 can drive the carrier 121 to move toward the terminal positioning member 13 so that the battery semi-finished product 30 is pressed between the carrier 121 and the terminal positioning member 13, thereby achieving the positioning of the battery semi-finished product 30. After the welding operation of the terminal 32 and the collector plate 33 is completed, the drive mechanism 14 can drive the carrier 121 away from the terminal positioning member 13, thereby moving the battery semi-finished product 30 away from the terminal positioning member 13 so that the battery semi-finished product 30 can be taken out.

[0090] Combination Figure 2 and Figure 3 In some embodiments, the drive mechanism 14 includes a drive source (not shown) and a transmission member 141 that is driven and connected to the drive source. The transmission member 141 is disposed on the side of the carrier 121 away from the pole positioning member 13, and the transmission member 141 is in transmission cooperation with the carrier 121.

[0091] Understandably, the drive source is used to drive the transmission component 141 to move along the first direction or the second direction.

[0092] The driving source can be a cylinder, a hydraulic cylinder, or other linear drive mechanism, and the driving source can drive the transmission component 141 to move along a first direction or a second direction.

[0093] Combination Figure 2 and Figure 4 Furthermore, the bearing mechanism 12 also includes an elastic element 124 supported by the transmission element 141, and the elastic element 124 abuts against the carrier 121.

[0094] It is understandable that during the process of the drive source driving the transmission component 141 to move along the first direction, the terminal post 32 of the battery semi-finished product 30 will abut against the terminal post positioning component 13. After that, even if the drive source drives the transmission component 141 to move along the first direction again, the elastic component 124 will be compressed, thereby preventing the carrier 121 from continuing to move along the first direction, thus reducing the risk of the battery semi-finished product 30 being crushed and ensuring high reliability.

[0095] Specifically, the bearing mechanism 12 also includes a mounting base 123, which is located on the side of the carrier 121 away from the pole positioning member 13. The transmission member 141 is located on the side of the mounting base 123 away from the carrier 121 and supports the elastic member 124. The elastic member 124 abuts against the mounting base 123.

[0096] Furthermore, the mounting base 123 has a mounting hole 1231 on the side away from the carrier 121. The elastic element 124 passes through the mounting hole 1231 and extends out of the mounting hole 1231 to abut against the transmission element 141. The mounting hole 1231 limits the elastic element 124, which can reduce the risk of the elastic element 124 tilting.

[0097] The elastic element 124 can be a spring, a sheet, or other elastic component.

[0098] Furthermore, the supporting mechanism 12 also includes a base 125 sleeved outside the mounting base 123, and the transmission member 141 supports the base 125 and is connected to the base 125; the base 125 is configured to be able to be driven by the transmission member 141 to move the mounting base 123 in a first direction or a second direction, and to be able to be driven by the transmission member 141 to move in the first direction when the transmission member 141 moves in the first direction and the mounting base 123 is restricted from moving in the first direction.

[0099] Understandably, after the battery semi-finished product 30 is placed on the carrier 121, firstly, the drive source drives the transmission component 141 to move along the first direction. When the terminal post positioning component 13 abuts against the pressure plate 15, the drive source continues to drive the transmission component 141 to move along the first direction. The carrier 121 and the mounting base 123 are restricted by the battery semi-finished product 30 and cannot continue to move upward. The elastic component 124 is compressed, and the base 125 continues to move towards the terminal post positioning component 13 relative to the mounting base 123.

[0100] It should be noted that the connection between the base 125 and the transmission component 141 enables the drive mechanism 14 to reliably connect with the support mechanism 12, ensuring that the drive mechanism 14 smoothly drives the support mechanism 12 to move.

[0101] Furthermore, a bushing 126 is fitted between the mounting base 123 and the base 125. The bushing 126 is used to reduce the friction between the mounting base 123 and the base 125 support when the mounting base 123 and the base 125 move relative to each other.

[0102] Among them, bushing 126 is an oil-free bushing.

[0103] Specifically, the inner sidewall of the base 125 has a step 1251, the bushing 126 is fitted onto the mounting base 123 and located between the mounting base 123 and the base 125, and the bushing 126 is supported by the step 1251. The bearing mechanism 12 also includes a limiting member 127 for limiting the end of the bushing 126 away from the step 1251.

[0104] Among them, the limiting component 127 is a screw, which passes through the base 125. The bolt presses down on a washer, and the washer abuts against the end of the bushing 126 away from the step 1251.

[0105] like Figure 6 As shown, the present invention also relates to a welding system, including the welding auxiliary device 10 and the welding device 20 described above. The welding device 20 is used to weld the current collector 33 and the terminal post 32 of the battery semi-finished product 30, which are fixed on the welding auxiliary device 10, together.

[0106] Specifically, the welding device 20 is a laser welding device. The laser emitted by the welding device 20 can act on the electrode post 32 and penetrate the electrode post 32 to weld the electrode post 32 and the collector plate 33.

[0107] Furthermore, the welding device 20 includes a slide 21, a laser collimator 22 disposed on the slide 21, a galvanometer 23 disposed on the slide 21, and a field mirror 24 disposed on the slide 21. The laser can act on the electrode post 32 and penetrate the electrode post 32 through the laser collimator 22, the galvanometer 23, and the field mirror 24 to weld the electrode post 32 and the collector plate 33.

[0108] Understandably, the welding device 20 also includes a laser source, which is connected to the laser collimator 22 via an optical fiber. The laser source is used to generate laser light.

[0109] Combination Figure 4 and Figure 6 In some embodiments, the pole positioning member 13 is provided with a clearance through hole 132 that is disposed opposite to the gas outlet of the gas channel 1211, and the field lens 24 is disposed opposite to the clearance through hole 132. In this way, the laser from the field lens 24 can directly act on the pole 32 and penetrate the pole 32 to weld the pole 32 and the collector plate 33.

[0110] Combination Figure 2 and Figure 4 It should be noted that the pressure plate 15 is also provided with a through hole 151 opposite to the avoidance through hole 132. The laser from the field lens 24 can pass through the through hole 151 and the avoidance through hole 132 and act directly on the pole post 32.

[0111] When using the welding system of the present invention, firstly, the battery semi-finished product 30 is placed on the bearing surface 1212 of the carrier 121, and the center hole 311 of the cell 31 of the battery semi-finished product 30 is aligned with the gas outlet of the gas channel 1211; then, the electrode positioning member 13 is brought into contact with the electrode 32 of the battery semi-finished product 30, thereby achieving the positioning of the battery semi-finished product 30; then, the gas filling mechanism fills the gas channel 1211 with gas, so that the current collector 33 of the battery semi-finished product 30 is close to the electrode 32 of the battery semi-finished product 30; then, the welding device 20 is used to weld the current collector 33 and the electrode 32 together.

[0112] The welding auxiliary system of the present invention can not only position the battery semi-finished product 30, but also make the current collector 33 of the battery semi-finished product 30 fit tightly with the terminal post 32. After completing the welding operation of the current collector 33 and the terminal post 32, the risk of incomplete welding or weak welding can be reduced and the welding quality can be improved.

[0113] The present invention also relates to a welding method applied to the above-mentioned welding system, the welding method comprising:

[0114] S100, the battery semi-finished product 30 is placed on the bearing surface 1212 of the carrier 121, and the center hole 311 of the cell 31 of the battery semi-finished product 30 is opposite to the gas outlet of the gas channel 1211.

[0115] S200, so that the terminal post 32 of the battery semi-finished product 30 abuts against the terminal post positioning member 13;

[0116] S300, the inflation mechanism fills the gas channel 1211 with gas so that the collector 33 of the battery semi-finished product 30 is in close contact with the terminal post 32 of the battery semi-finished product 30.

[0117] S400, welding device 20 welds manifold 33 and pole post 32 together.

[0118] Understandably, the above welding method can not only position the battery semi-finished product 30, but also make the current collector 33 of the battery semi-finished product 30 fit tightly with the terminal post 32. After completing the welding operation between the current collector 33 and the terminal post 32, the risk of incomplete welding or weak welding can be reduced, and the welding quality can be improved.

[0119] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0120] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A welding auxiliary device, characterized in that, include: Mounting rack; A pole positioning component is disposed on the mounting bracket; A support mechanism is provided on the mounting frame. The support mechanism includes a carrier disposed opposite to the pole positioning member. The carrier is provided with a support surface disposed opposite to the pole positioning member. The carrier has a gas channel inside, and the gas outlet of the gas channel passes through the support surface. An inflation mechanism for filling the gas channel with gas; The bearing surface is used to place the battery semi-finished product so that the center hole of the battery cell of the battery semi-finished product is opposite to the gas outlet of the gas channel; the terminal positioning member can press on the terminal of the battery semi-finished product.

2. The welding auxiliary device according to claim 1, characterized in that, The carrier also includes a positioning part connected to the bearing surface. The positioning part is arranged to form a positioning space, which is used for the battery semi-finished product to pass through and for the central hole of the battery cell of the battery semi-finished product to be opposite to the gas outlet of the gas channel.

3. The welding auxiliary device according to claim 1, characterized in that, The distance between the carrier and the pole positioning element is variable.

4. The welding auxiliary device according to claim 3, characterized in that, It also includes a drive mechanism, which is driven to the vehicle and can drive the vehicle to move along a first direction or a second direction opposite to the first direction, wherein the first direction is from the vehicle to the pole positioning member; The drive mechanism can apply a force to the carrier so that the terminal of the battery semi-finished product placed on the carrier abuts against the terminal positioning member.

5. The welding auxiliary device according to claim 4, characterized in that, The pole positioning component is fixed to the mounting bracket; or... A pressure plate is fixedly installed on the mounting bracket. The pressure plate is located on the side of the pole positioning member away from the carrier. The pole positioning member is movable between the pressure plate and the carrier.

6. The welding auxiliary device according to claim 4 or 5, characterized in that, The driving mechanism includes a driving source and a transmission component that is driven and connected to the driving source. The driving source can drive the transmission component to move along the first direction or the second direction. The bearing mechanism further includes an elastic element, and the transmission element is disposed on the side of the carrier away from the pole positioning element and supports the elastic element, and the elastic element abuts against the carrier.

7. The welding auxiliary device according to claim 6, characterized in that, The bearing mechanism further includes a mounting base and a base. The mounting base is located on the side of the carrier away from the pole positioning member. The elastic member abuts against the mounting base. The base is sleeved outside the mounting base. The transmission member supports the base and is connected to the base. The base is configured to: be driven by the transmission member to move the mounting base along the first direction, and be driven by the transmission member to move along the first direction when the transmission member moves along the first direction and the mounting base is restricted from moving along the first direction.

8. The welding auxiliary device according to claim 1, characterized in that, The pole positioning component is provided with a clearance through hole that is disposed opposite to the gas outlet of the gas channel.

9. A welding system, characterized in that, include: The welding auxiliary device according to any one of claims 1 to 8; A welding device for welding together the current collector and terminal post of a battery semi-finished product fixed on the welding auxiliary device.

10. A welding method, characterized in that, The welding method, applied to the welding system of claim 9, comprises: The battery semi-finished product is placed on the bearing surface, and the center hole of the battery cell of the battery semi-finished product is opposite to the gas outlet of the gas channel; The terminal post of the battery semi-finished product abuts against the terminal post positioning component; The inflation mechanism fills the gas channel with gas so that the current collector of the battery semi-finished product is in close contact with the terminal post of the battery semi-finished product. The welding device welds the manifold and the pole together.

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