Welding verification tool

Abstract

The utility model relates to the technical field of lithium ion battery production, in particular to a welding verification tool which comprises a bearing seat, a first moving seat, a welding pressing tool, an elastic piece, a second moving seat and a pressure sensor. When the pressure sensor abuts against the elastic piece, the elastic piece deforms, and the top cover and the bar piece abut against the bearing seat through the welding pressing tool. Compared with the mode that the bar piece abuts against the top cover through an adhesive tape, the welding pressing tool enables the bar piece to be attached to and make contact with the pole of the top cover more tightly, and the welding working condition is closer to the real welding working condition. The acting force of the welding pressing tool on the top cover and the sheet is fed back to the pressure sensor through the deformed elastic piece, and the pressure sensor measures the pressure needed by actual welding of the top cover and the sheet. The welding verification tool can simulate two actual welding working conditions, the authenticity and effectiveness of verification welding parameters are ensured, and the verification welding parameters are matched with parameters needed by actual welding.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion battery production, in particular to a welding verification tool. Background Art

[0002] Lithium-ion batteries have the advantages of high energy density, good safety and long cycle life, and are widely used in the field of vehicles. Multiple lithium-ion cells are stacked to form a module. The cells in the module are connected in series and parallel through a bus. The tabs on the bus and the poles on the top cover of the cell are connected by laser welding.

[0003] Before batch welding, the welding conditions need to be verified with the help of welding verification tooling to provide technical support for mass production in order to ensure the yield of the product. Usually, the top cover is placed on the operating platform, and the bar is pressed against the top cover with the help of tape. Then, the laser galvanometer emits a laser beam to weld the pole and bar of the top cover. During actual welding, the surface of the top cover and the surface of the bar may both be in the vertical plane. Therefore, the welding parameters obtained with the help of traditional welding verification tooling may not match the parameters required for actual welding. Utility Model Content

[0004] The utility model provides a welding verification tool, which is used to solve the problem that welding parameters obtained by means of a traditional welding verification tool may not match parameters required for actual welding.

[0005] The utility model provides a welding verification tool, comprising:

[0006] Bearing seat;

[0007] A first movable seat, capable of moving toward the bearing seat;

[0008] The welding press is installed on the first movable seat and can move toward the bearing seat along with the first movable seat;

[0009] An elastic member, mounted on the first movable seat;

[0010] A second movable seat, capable of moving toward the first movable seat;

[0011] The pressure sensor is installed on the second movable seat, can move with the second movable seat toward the first movable seat, and can press against the elastic member;

[0012] When the pressure sensor is pressed against the elastic member, the elastic member is deformed, and the welding press presses the top cover and the tab against the bearing seat.

[0013] In some embodiments, the elastic member comprises:

[0014] A support tube, one end of which is fixedly connected to a side of the first movable seat away from the bearing seat;

[0015] The first spring is inserted into the support tube, and one end of the first spring can abut against the pressure sensor.

[0016] In some embodiments, it also includes:

[0017] The driving mechanism is connected to the second moving seat and is used to drive the second moving seat to move toward the first moving seat.

[0018] In some embodiments, the driving mechanism comprises:

[0019] The screw rod is arranged on a side of the second movable seat away from the first movable seat and can rotate;

[0020] The nut is sleeved on the screw rod and can move along the axial direction of the screw rod; the nut is fixedly connected to a side of the second moving seat away from the first moving seat.

[0021] In some embodiments, the driving mechanism further comprises:

[0022] A guide cylinder, one end of which is fixedly connected to a side of the first movable seat away from the bearing seat;

[0023] The guide rod has one end inserted into the guide cylinder through the end of the guide cylinder away from the first movable seat, and the other end fixedly connected with the second movable seat.

[0024] In some embodiments, the driving mechanism further comprises:

[0025] The hand wheel is fixed to an end of the screw rod away from the second moving seat.

[0026] In some embodiments, it also includes:

[0027] The guide rail, the axis of which is parallel to the axis of the elastic member;

[0028] The sliding block is slidably arranged on the guide rail and is fixedly connected to the first moving seat.

[0029] In some embodiments, the welding press comprises:

[0030] The mounting seat is fixed on the first movable seat; the mounting seat is provided with a first clearance hole, and at least one side is provided with a dust removal hole connected to the first clearance hole;

[0031] The pressure head has a plurality of connecting rods at one end and is connected to the mounting seat through the plurality of connecting rods; at least one connecting rod is sleeved with a linear bearing, and at least one connecting rod is provided with a second spring; the middle part of the pressure head is hollow to form a second clearance hole, and at least one side is provided with a protective gas inflow hole connected to the second clearance hole; the second clearance hole is connected to the first clearance hole to form a laser channel.

[0032] In some embodiments, the carrier includes:

[0033] A base; the base is provided with a receiving groove for receiving the top cover;

[0034] The limiting stop bar is arranged on one side of the base and is used to limit the top cover.

[0035] In some embodiments, it also includes:

[0036] The supporting seat is provided with a bearing seat, a first movable seat and a second movable seat.

[0037] The beneficial effects of the utility model are as follows: the welding verification tool of the utility model is provided with a bearing seat, a first movable seat, a welding press, an elastic member, a second movable seat and a pressure sensor, and the bearing seat is used to bear the top cover and the bar piece. When the pressure sensor is pressed against the elastic member, the elastic member is deformed, and the welding press presses the top cover and the bar piece against the bearing seat. Compared with the form of pressing the bar piece against the top cover with the help of tape, the welding press makes the bar piece and the pole of the top cover fit more closely and closer to the actual welding condition. The force of the welding press on the top cover and the bar piece is fed back to the pressure sensor through the deformed elastic member, and the pressure sensor measures the pressure required for the actual welding of the top cover and the bar piece. The welding verification tool can be placed vertically to simulate the vertical welding condition, or it can be placed horizontally to simulate the horizontal welding condition. It can simulate two actual welding conditions, ensure the authenticity and effectiveness of the verification welding parameters, make the verification welding parameters match the parameters required for actual welding, and the measured parameters can be directly applied to batch welding production without adjustment, thereby ensuring the yield of the product during batch production. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of some specific embodiments of a welding verification tool of the utility model;

[0039] Figure 2 yes Figure 1 The structural schematic diagrams of some specific embodiments of the elastic parts in the welding verification tooling shown;

[0040] Figure 3 yes Figure 1 The structural schematic diagrams of some specific embodiments of the mounting seat in the welding verification tool shown;

[0041] Figure 4 yes Figure 1 The schematic diagrams of the structures of some specific embodiments of the pressure head in the welding verification tool shown;

[0042] Figure 5 yes Figure 1 The schematic diagrams of the structures of some specific embodiments of the bearing seat in the welding verification tool are shown.

[0043] In the accompanying drawings, 110, the bearing seat; 111, the base; 112, the limit stop bar; 120, the first movable seat; 130, the welding press; 131, the mounting seat; 1311, the first clearance hole; 1312, the dust removal hole; 132, the pressure head; 1321, the connecting rod; 1322, the linear bearing; 1323, the second spring; 1324, the second clearance hole; 1325, the protective gas inflow hole; 140, the elastic member; 141, the supporting tube; 142, the first spring; 150, the second movable seat; 160, the pressure sensor; 170, the driving mechanism; 171, the screw rod; 172, the nut; 173, the guide tube; 174, the guide rod; 175, the hand wheel; 180, the guide rail; 190, the slider; 200, the top cover; 300, the bar. DETAILED DESCRIPTION

[0044] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] As mentioned in the background technology, usually, the top cover is placed on the operating platform, and then the bar is pressed against the top cover with the help of tape, and then the laser galvanometer emits a laser beam to weld the pole and the bar of the top cover. During actual welding, the surface where the top cover and the surface where the bar are located may both be in the vertical plane, so the welding parameters obtained by the traditional welding verification tool may not match the parameters required for actual welding.

[0046] To solve the above problems, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The utility model provides a welding verification tool, including a bearing seat 110, a first movable seat 120, a welding press 130, an elastic member 140, a second movable seat 150 and a pressure sensor 160. The bearing seat 110 is used to bear the top cover 200 and the bar piece 300. The first movable seat 120 can move toward the bearing seat 110. The welding press 130 is installed on the first movable seat 120, can move toward the bearing seat 110 with the first movable seat 120, and can press the top cover 200 and the bar piece 300 against the bearing seat 110. The elastic member 140 is installed on the first movable seat 120. The second movable seat 150 can move toward the first movable seat 120. The pressure sensor 160 is installed on the second movable seat 150, can move toward the first movable seat 120 with the second movable seat 150, and can press against the elastic member 140. When the pressure sensor 160 presses against the elastic member 140, the elastic member 140 is deformed, and the welding press 130 presses the top cover 200 and the bar 300 against the bearing seat 110. Compared with the form of pressing the bar 300 against the top cover 200 with the help of tape, the welding press 130 makes the bar 300 and the pole of the top cover 200 fit more closely and is closer to the actual welding condition. The force of the welding press 130 on the top cover 200 and the bar 300 is fed back to the pressure sensor 160 through the deformed elastic member 140, and the pressure sensor 160 measures the pressure required for the actual welding of the top cover 200 and the bar 300. The welding verification tooling can be placed vertically to simulate vertical welding conditions, or horizontally to simulate horizontal welding conditions. It can simulate two actual welding conditions, ensuring the authenticity and effectiveness of the verified welding parameters, so that the verified welding parameters match the parameters required for actual welding. The measured parameters can be directly applied to batch welding production without adjustment, ensuring the yield of products during batch production.

[0047] Preferably, the welding verification tool also includes a pressure display gauge, which is electrically connected to the pressure sensor 160 and is used to display the pressure value so that the operator can read the pressure value.

[0048] Specifically, in the exemplary embodiment, the pressure sensor 160 is fixed to a side of the second movable seat 150 close to the first movable seat 120. The elastic member 140 includes a support tube 141 and a first spring 142. One end of the support tube 141 is fixedly connected to a side of the first movable seat 120 away from the bearing seat 110. The first spring 142 is inserted into the support tube 141, and one end of the first spring 142 can abut against the pressure sensor 160. When the welding press 130 presses the top cover 200 and the bar piece 300 against the bearing seat 110, the pressure sensor 160 moves toward the first movable seat 120 with the second movable seat 150, so that the first spring 142 is gradually compressed. The force of the first spring 142 acting on the pressure sensor 160 can be regarded as the pressure of the welding press 130 acting on the top cover 200 and the bar piece 300, thereby measuring the actual pressure required for welding.

[0049] Specifically, in the exemplary embodiment, the welding verification tool further includes a driving mechanism 170. The driving mechanism 170 is connected to the second movable seat 150 and is used to drive the second movable seat 150 to move toward the first movable seat 120, so that the working efficiency of the welding verification tool can be effectively improved.

[0050] Specifically, in the exemplary embodiment, the driving mechanism 170 includes a screw 171, a nut 172, a guide cylinder 173 and a guide rod 174. The screw 171 is arranged on a side of the second moving seat 150 away from the first moving seat 120 and can rotate. The nut 172 is sleeved on the screw 171 and can move along the axial direction of the screw 171 when the screw 171 rotates. The nut 172 is fixedly connected to a side of the second moving seat 150 away from the first moving seat 120. The screw 171 cooperates with the nut 172 to drive the second moving seat 150 to move toward or away from the first moving seat 120. One end of the guide cylinder 173 is fixedly connected to a side of the first moving seat 120 away from the bearing seat 110. One end of the guide rod 174 is inserted into the guide cylinder 173 through the end of the guide cylinder 173 away from the first moving seat 120, and the other end is fixedly connected to the second moving seat 150. The guide cylinder 173 and the guide rod 174 cooperate with each other to guide the moving direction of the second moving seat 150 and improve the smoothness of the movement of the second moving seat 150.

[0051] In some embodiments, the driving mechanism 170 further includes a handwheel 175 , which is fixed to one end of the screw rod 171 away from the second movable seat 150 , and a crank is provided on the handwheel 175 so that the screw rod 171 can be driven to rotate by a human hand.

[0052] In other embodiments, the driving mechanism 170 further includes a driving motor, the output shaft of which is fixedly connected to the end of the screw rod 171 away from the second movable seat 150, and can drive the screw rod 171 to rotate. Compared with the manual driving method, the degree of automation is improved and the work efficiency is improved.

[0053] Specifically, in the exemplary embodiment, the welding verification tool further includes a guide rail 180, a slider 190 and a third movable seat. The axis of the guide rail 180 is parallel to the axis of the elastic member 140. The slider 190 is slidably disposed on the guide rail 180 and is fixedly connected to the first movable seat 120 through the third movable seat. The slider 190 cooperates with the guide rail 180 to improve the smoothness of the movement of the first movable seat 120 and the welding press 130.

[0054] Specifically, in the exemplary embodiment, the welding press 130 includes a mounting seat 131 and a pressing head 132. The mounting seat 131 is fixed to a side of the first movable seat 120 close to the bearing seat 110. A first clearance hole 1311 is provided on the mounting seat 131. A dust removal hole 1312 connected to the first clearance hole 1311 is provided on one side, two sides, three sides or four sides of the mounting seat 131. A plurality of connecting rods 1321 are provided at one end of the pressing head 132, which are detachably connected to a side of the mounting seat 131 close to the bearing seat 110 through the plurality of connecting rods 1321. A linear bearing 1322 is sleeved on one or two of the connecting rods 1321 so that the mounting seat 131 can move along the axial direction of the pressing head 132. A second spring 1323 is sleeved on one or two of the connecting rods 1321, which is respectively in contact with the mounting seat 131 and the pressing head 132. When the pressure head 132 presses against the bar piece 300 and the top cover 200, the mounting seat 131 can continue to move toward the bearing seat 110, so that the second spring 1323 is compressed. The second spring 1323 in the compressed state makes the poles of the bar piece 300 and the top cover 200 fit more closely. The middle of the pressure head 132 is hollow to form a second clearance hole 1324. One side, two sides, three sides or four sides of the pressure head 132 are provided with a protective gas inflow hole 1325 connected to the second clearance hole 1324. The dust removal hole 1312 can be connected to the exhaust device to facilitate the exhaust of the smoke generated during welding to prevent the smoke from affecting the welding quality. The protective gas can be blown into the laser channel through the protective gas inflow hole 1325. The second clearance hole 1324 is connected to the first clearance hole 1311 to form a laser channel. Compared with the traditional welding verification tooling, it can simulate the actual welding conditions more realistically.

[0055] Specifically, in the exemplary embodiment, the bearing seat 110 includes a base 111 and a limit stop bar 112. A receiving groove for accommodating the top cover 200 is provided on the base 111. The limit stop bar 112 is provided on one side of the base 111, and one side surface can abut against one end of a plurality of top covers 200 of different sizes, so as to limit the position of the plurality of top covers 200 of different sizes, so that the welding verification tool is applicable to the verification of welding parameters of a plurality of top covers 200 and a plurality of tabs 300, and has strong versatility.

[0056] Specifically, in the exemplary embodiment, the welding verification tooling also includes a support seat to facilitate the overall position transfer of the welding verification tooling. The support seat includes a bottom plate and a top plate. The opposite ends of the top plate are fixedly connected to the opposite ends of the bottom plate through the vertical plate. The screw rod 171 is rotatably connected to the top plate through a nut. The second movable seat 150 is mounted on the screw rod 171 through a nut 172. The bearing seat 110 is fixed to a side of the bottom plate close to the top plate by bolts. The guide rail 180 is installed on a side surface of the vertical plate close to the bottom plate. The first movable seat 120 is slidably mounted on the guide rail 180 through a slider 190.

[0057] Preferably, there is one support base 110, and two support bases 175, screw rod 171, screw nut 172, second movable base 150, pressure sensor 160, elastic member 140, first movable base 120, and welding press 130, which share one support base 110. In this way, two welding verification tests can be performed simultaneously, thereby improving verification efficiency.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A welding verification tool, characterized in that: include: Bearing seat; A first movable seat, capable of moving toward the bearing seat; A welding press, mounted on the first movable seat, capable of moving toward the bearing seat along with the first movable seat; An elastic member, mounted on the first movable seat; a second movable seat, capable of moving toward the first movable seat; a pressure sensor, mounted on the second movable seat, capable of moving with the second movable seat toward the first movable seat, and capable of pressing against the elastic member; When the pressure sensor is pressed against the elastic member, the elastic member is deformed, and the welding press presses the top cover and the tab against the bearing seat.

2. The welding verification tool according to claim 1, characterized in that: The elastic member comprises: A support tube, one end of which is fixedly connected to a side of the first movable seat away from the bearing seat; The first spring is inserted into the support tube, and one end of the first spring can abut against the pressure sensor.

3. The welding verification tool according to claim 1, characterized in that: Also includes: The driving mechanism is connected to the second moving seat and is used to drive the second moving seat to move toward the first moving seat.

4. The welding verification tool according to claim 3, characterized in that: The driving mechanism comprises: A screw rod is arranged on a side of the second movable seat away from the first movable seat and can rotate; The nut is sleeved on the screw rod and can move along the axial direction of the screw rod; the nut is fixedly connected to a side of the second movable seat away from the first movable seat.

5. The welding verification tool according to claim 4, characterized in that: The driving mechanism further comprises: A guide cylinder, one end of which is fixedly connected to a side of the first movable seat away from the bearing seat; A guide rod has one end inserted into the guide cylinder through an end of the guide cylinder away from the first movable seat, and the other end fixedly connected to the second movable seat.

6. The welding verification tool according to claim 4, characterized in that: The driving mechanism further comprises: A hand wheel is fixed to an end of the screw rod away from the second moving seat.

7. The welding verification tool according to any one of claims 1 to 6, characterized in that: Also includes: A guide rail, the axis of which is parallel to the axis of the elastic member; The sliding block is slidably disposed on the guide rail and is fixedly connected to the first moving seat.

8. The welding verification tool according to any one of claims 1 to 6, characterized in that: The welding press comprises: A mounting seat is fixed on the first movable seat; a first clearance hole is opened on the mounting seat, and a dust removal hole connected to the first clearance hole is arranged on at least one side; A pressure head, one end of which is provided with a plurality of connecting rods, and is connected to the mounting seat through the plurality of connecting rods; at least one of the connecting rods is provided with a linear bearing, and at least one of the connecting rods is provided with a second spring; the middle part of the pressure head is hollow to form a second clearance hole, and at least one side is provided with a protective gas inflow hole connected to the second clearance hole; the second clearance hole is connected with the first clearance hole to form a laser channel.

9. The welding verification tool according to any one of claims 1 to 6, characterized in that: The bearing seat comprises: A base; the base is provided with a receiving groove for accommodating the top cover; A limiting stop bar is arranged on one side of the base and is used to limit the top cover.

10. The welding verification tool according to any one of claims 1 to 6, characterized in that: Also includes: Support seat; the bearing seat, the first movable seat and the second movable seat are installed on the support seat.

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