A protection sheet welding tool

Abstract

The utility model relates to tooling technical field discloses a kind of protective sheet welding tool, with first direction, second direction and third direction that intersect each other, including cover plate body and clamping part, cover plate body includes first side and second side opposite along third direction, cover plate body is provided with positioning hole and accommodating hole, positioning hole is communicated with second side, positioning hole is used for with jig pin shaft positioning cooperation;Accommodating hole penetrates cover plate body along third direction, accommodating hole is used for with electrode protective sheet positioning cooperation;Accommodating hole in the orifice of second side is less than accommodating hole in the orifice of first side, accommodating hole has the guide wall of inclination arrangement along third direction;Clamping part is fixedly connected to first side, clamping part is arranged with interval with accommodating hole in first side, clamping part is used for supplying mechanical hand clamping cover plate body.Prevent the position deviation of cover plate body relative to electrode assembly due to vibration in welding process, the position of cover plate body is stable and avoid welding slag flying scrap into electrode assembly.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology, and in particular to a protective sheet welding tooling. Background Technology

[0002] Currently, lithium-ion batteries are not only used in portable consumer electronics products such as mobile phones and laptops, but also widely used as power batteries for new energy vehicles due to their high energy density.

[0003] In lithium battery production, ultrasonic welding of the positive and negative electrode protective sheets is a critical process. High-frequency vibrations are transmitted to the surfaces of the protective sheets and the electrode assembly, causing them to rub against each other and fuse the molecular layers. However, ultrasonic welding generates spatter, and weld slag and debris pose a risk of falling into the electrode assembly. Currently, existing split-type welding fixtures have inner diameters larger than the electrode protective sheets, making them prone to vibration during ultrasonic welding. This can cause the electrode protective sheets to shift, making it unreliable to position them and protect the electrode assembly.

[0004] In summary, during ultrasonic welding, existing welding fixtures are unable to effectively position the electrode protection plate and prevent welding slag from entering the electrode assembly, resulting in a high scrap rate of the electrode assembly after welding. Utility Model Content

[0005] The technical problem to be solved by this utility model is that in the process of ultrasonic welding, the existing welding fixtures are difficult to effectively position the electrode protection plate and prevent welding slag from entering the electrode assembly, resulting in a high scrap rate of the electrode assembly after welding.

[0006] To solve the above-mentioned technical problems, this utility model provides a technical solution for a protective sheet welding fixture:

[0007] The welding fixture for protective plates has three intersecting directions: a first direction, a second direction, and a third direction, including:

[0008] The cover plate body has a first side and a second side opposite to each other along the third direction. The cover plate body is provided with a positioning hole and a receiving hole. The positioning hole is connected to the second side and is used to position and cooperate with the fixture pin.

[0009] The receiving hole penetrates the cover plate body along the third direction and is used for positioning and cooperating with the electrode protection sheet; the opening of the receiving hole on the second side is smaller than the opening of the receiving hole on the first side, and the receiving hole has a guide wall that is inclined along the third direction.

[0010] The clamping part is fixedly connected to the first side surface. The clamping part and the receiving hole are arranged at intervals on the first side surface. The clamping part is used for the robot arm to clamp and transfer the cover plate body.

[0011] Furthermore, the receiving hole has a first hole segment and a second hole segment connected along the third direction, the second hole segment communicating with the second side surface, the first hole segment gradually narrowing in size as it approaches the second side surface along the third direction, and the guide wall being the inner wall of the first hole segment closest to the clamping part.

[0012] Furthermore, the first hole segment also has a first wall, which is arranged parallel to the third direction, and the first wall and the guide wall together form the first hole segment.

[0013] Furthermore, the second hole segment also has a second wall, which is arranged parallel to the third direction, and the first wall and the second wall are coplanar, with the second wall forming the second hole segment.

[0014] Furthermore, a chip removal groove is provided at one end of the first hole section near the second hole section, and the chip removal groove extends parallel to the first side.

[0015] Furthermore, the chip removal grooves are provided in multiple ways, and the multiple chip removal grooves are arranged circumferentially around the first hole segment.

[0016] Furthermore, the receiving hole is also provided with a foolproof part, which extends along the third direction and is spaced apart from the guide wall along the first direction.

[0017] Furthermore, the cross-sectional shape of the cover plate body along the second direction is an isosceles trapezoid that is wider at the top and narrower at the bottom, and the width of the first side in the second direction is greater than the width of the second side in the second direction.

[0018] Furthermore, the clamping part is disposed at the end of the cover plate body in the first direction, the receiving holes are symmetrically distributed in the middle of the cover plate body about the first direction, and the positioning hole is arranged between the receiving holes and the clamping part.

[0019] Furthermore, the clamping part includes a column part and a stop part, the column part is disposed on the first side along the third direction, and the stop part is fixedly connected to the end of the column part away from the cover plate body.

[0020] Compared with existing technologies, the protective plate welding fixture of this utility model has the following advantages: The fixture adopts a structure design of a cover plate body and a clamping part. The cover plate body includes a first side and a second side opposite to each other along a third direction. A positioning hole is provided in the cover plate body, which connects to the second side. In use, the second side of the cover plate body is pressed onto the surface of the electrode assembly. Through the positioning hole and the engagement with the fixture pin, the cover plate body is positioned and installed, preventing positional displacement relative to the electrode assembly due to vibration during ultrasonic welding. This ensures the stable position of the cover plate body and prevents welding slag from entering the electrode assembly.

[0021] The cover plate body has a through-hole extending in a third direction. The opening of the through-hole on the second side is smaller than the opening on the first side. The through-hole has a guide wall that slopes in a third direction. In other words, the through-hole is designed to taper towards the second side. The electrode protection sheet can be placed in the opening of the through-hole on the first side. Due to its own weight, it falls to the opening on the second side. During its fall, the guide wall guides the electrode protection sheet, automatically aligning it and ensuring precise positioning and contact between the electrode protection sheet and the electrode assembly.

[0022] In addition, the clamping part is fixed to the first side of the cover plate body. The clamping part and the receiving hole are arranged at intervals. The clamping part can be used by the robot arm to clamp and transfer the cover plate body and accurately transfer the cover plate body to the fixture. There is no need for manual disassembly and transfer, which ensures the reliability of the welding operation and reduces the scrap rate of the electrode assembly after welding. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the welding fixture for the protective sheet in an embodiment of this utility model;

[0024] Figure 2 This is a side view of the welding fixture for the protective sheet in an embodiment of this utility model;

[0025] Figure 3 This is a top view of the protective sheet welding fixture in the working state in an embodiment of this utility model;

[0026] Figure 4 yes Figure 3 Cross-sectional view at point AA;

[0027] Figure 5 yes Figure 3 Cross-sectional view at BB;

[0028] In the figure: 1-Cover plate body, 10-Accommodation hole, 100-Guide wall, 101-First hole section, 102-Second hole section, 103-First wall, 104-Second wall, 105-Chip removal groove, 106-Anti-foolproof part, 11-First side, 12-Second side, 13-Positioning hole, 2-Clamping part, 21-Column part, 22-Stop part, 3-Jig pin, 4-Electrode protection plate, 5-Robot arm, X-First direction, Y-Second direction, Z-Third direction. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0030] In the description of this utility model, 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," "clockwise," and "counterclockwise" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0033] like Figures 1 to 5As shown, a protective sheet welding fixture according to an embodiment of the present invention has a first direction X, a second direction Y and a third direction Z that intersect each other, including: a cover plate body 1 and a clamping part 2. The cover plate body 1 has a first side 11 and a second side 12 that are opposite to each other along the third direction Z. The cover plate body 1 is provided with a positioning hole 13 and a receiving hole 10. The positioning hole 13 is connected to the second side 12 and is used for positioning and cooperating with the fixture pin 3.

[0034] The receiving hole 10 penetrates the cover plate body 1 along the third direction Z and is used for positioning and cooperating with the electrode protection sheet 4. The opening of the receiving hole 10 on the second side 12 is smaller than the opening of the receiving hole 10 on the first side 11. The receiving hole 10 has a guide wall 100 that is inclined along the third direction Z. The clamping part 2 is fixedly connected to the first side 11 and is arranged at a distance from the receiving hole 10 on the first side 11. The clamping part 2 is used for the robot arm 5 to clamp and transplant the cover plate body 1.

[0035] The protective plate welding fixture adopts a structural design of a cover plate body 1 and a clamping part 2. The cover plate body 1 includes a first side 11 and a second side 12 opposite to each other along the third direction Z. The cover plate body 1 has a positioning hole 13, which connects to the second side 12. In use, the second side 12 of the cover plate body 1 is pressed onto the surface of the electrode assembly. Through the positioning hole 13 and the engagement with the fixture pin 3, the cover plate body 1 can be positioned and installed, preventing the cover plate body 1 from shifting relative to the electrode assembly due to vibration during ultrasonic welding. The cover plate body 1 is stable and prevents welding slag from entering the electrode assembly.

[0036] The cover plate body 1 has a receiving hole 10 extending in the third direction Z. The opening of the receiving hole 10 on the second side 12 is smaller than the opening on the first side 11. The receiving hole 10 has a guide wall 100 that is inclined in the third direction Z. That is, the receiving hole 10 is designed to be a tapered hole facing the second side 12. The electrode protection piece 4 can be placed in the opening of the receiving hole 10 on the first side 11. Due to its own gravity, it falls to the opening of the second side 12. During the falling process, the guide wall 100 guides the electrode protection piece 4, so that the electrode protection piece 4 automatically aligns with the position, thereby ensuring precise positioning and contact between the electrode protection piece 4 and the electrode assembly.

[0037] In addition, the clamping part 2 is fixed to the first side 11 of the cover plate body 1. The clamping part 2 and the receiving hole 10 are arranged at intervals. The clamping part 2 can be used by the robot arm 5 to clamp and transfer the cover plate body 1 and accurately transfer the cover plate body 1 to the fixture. There is no need for manual disassembly and transfer, which ensures the reliability of the welding operation and reduces the scrap rate of the electrode assembly after welding.

[0038] In this embodiment, the receiving hole 10 has a first hole segment 101 and a second hole segment 102 connected along the third direction Z. The second hole segment 102 connects to the second side surface 12. The first hole segment 101 gradually narrows in size as it approaches the second side surface 12 along the third direction Z. The guide wall 100 is provided in the first hole segment 101 and is the inner wall of the first hole segment 101 closest to the clamping part 2. The first hole segment 101 has a gradually narrowing opening as it approaches the second side surface 12 along the third direction Z, meaning the cross-sectional area of ​​the opening gradually decreases. The electrode protection piece 4 placed in the first hole segment 101 can be aligned and positioned, ensuring that the electrode protection piece 4 can accurately enter the second hole segment 102 and contact the electrode assembly, thereby achieving the purpose of high-precision welding positioning.

[0039] Furthermore, the first hole segment 101 also has a first wall 103, which is arranged parallel to the third direction Z. The first wall 103 and the guide wall 100 form the first hole segment 101. The first wall 103 of the receiving hole 10 is arranged parallel to the third direction Z. The first wall 103 can guide the electrode protection piece 4 placed in the first hole segment 101 along the third direction Z, ensuring that the electrode protection piece 4 can fall smoothly. In this process, combined with the single-sided guide wall 100, it can play a better alignment and positioning role.

[0040] As a further preferred embodiment, the second hole segment 102 also has a second wall 104, which is parallel to the third direction Z. The first wall 103 and the second wall 104 are coplanar, and the second wall 104 forms the second hole segment 102. Since the second wall 104 of the second hole segment 102 is a straight wall parallel to the third direction Z, it can reliably limit the electrode protection piece 4 therein, preventing it from detaching from the second hole segment 102 due to welding vibration. The coplanarity of the first wall 103 and the second wall 104 ensures that the electrode protection piece 4 is not obstructed or interfered with during its descent.

[0041] In this embodiment, a chip removal groove 105 is also provided at one end of the first hole segment 101 near the second hole segment 102, and the chip removal groove 105 extends parallel to the first side surface 11. Specifically, along the third direction Z, the chip removal groove 105 is set higher than the second hole segment 102, and the chip removal groove 105 can fully accommodate and collect welding slag and prevent welding slag and debris from entering the electrode assembly. As a further preferred embodiment, multiple chip removal grooves 105 are provided, and the multiple chip removal grooves 105 are arranged circumferentially around the first hole segment 101 at intervals. The multiple circumferentially distributed chip removal grooves 105 can effectively collect welding slag and debris splashing from different directions.

[0042] In this embodiment, the receiving hole 10 is also provided with a foolproof part 106, which extends along the third direction Z and is spaced apart from the guide wall 100 along the first direction X. The foolproof part 106 can provide a reminder for the placement of the electrode protection piece 4, thereby reducing the installation error rate of the electrode protection piece 4.

[0043] The cover plate body 1 has an isosceles trapezoidal shape along the second direction Y, which is wider at the top and narrower at the bottom. The width of the first side 11 in the second direction Y is greater than the width of the second side 12 in the second direction Y. In the second direction Y, the width of the first side 11 is larger than that of the second side 12, which can provide a larger shielding and protection area, effectively preventing welding slag and debris from splashing out and falling into the electrode assembly.

[0044] Furthermore, the clamping part 2 is disposed at the end of the cover plate body 1 in the first direction X, the receiving holes 10 are symmetrically distributed in the middle of the cover plate body 1 about the first direction X, and the positioning holes 13 are arranged between the receiving holes 10 and the clamping part 2. Along the first direction X, the clamping part 2 is away from the receiving holes 10 and the positioning holes 13, which avoids the possible interference of the hole positions by the clamping operation of the robot arm and improves the rationality of the tooling structure layout.

[0045] In addition, the clamping part 2 includes a column part 21 and a stop part 22. The column part 21 is disposed on the first side surface 11 in a third direction Z, and the stop part 22 is fixedly connected to the end of the column part 21 away from the cover plate body 1. The column part 21 can form an effective cooperation with the robot arm, while the stop part 22 can prevent slippage and falling during the clamping process, ensuring the stability of the clamping and transplanting process.

[0046] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A welding fixture for protective plates, having intersecting first directions (X), second directions (Y), and a third direction (Z), characterized in that, include: The cover plate body (1) has a first side (11) and a second side (12) opposite to each other along the third direction (Z). The cover plate body (1) is provided with a positioning hole (13) and a receiving hole (10). The positioning hole (13) is connected to the second side (12). The positioning hole (13) is used for positioning and cooperating with the fixture pin (3). The receiving hole (10) penetrates the cover plate body (1) along the third direction (Z), and the receiving hole (10) is used for positioning and cooperating with the electrode protection sheet (4); the opening of the receiving hole (10) on the second side (12) is smaller than the opening of the receiving hole (10) on the first side (11), and the receiving hole (10) has a guide wall (100) arranged obliquely along the third direction (Z); The clamping part (2) is fixedly connected to the first side (11). The clamping part (2) and the receiving hole (10) are arranged at intervals on the first side (11). The clamping part (2) is used for the robot arm (5) to clamp and transfer the cover plate body (1).

2. The protective sheet welding fixture according to claim 1, characterized in that, The receiving hole (10) has a first hole segment (101) and a second hole segment (102) connected along the third direction (Z), the second hole segment (102) is connected to the second side surface (12), the first hole segment (101) is gradually smaller in size along the third direction (Z) near the second side surface (12), and the guide wall (100) is the inner wall of the first hole segment (101) near the clamping part (2).

3. The protective sheet welding fixture according to claim 2, characterized in that, The first hole segment (101) also has a first wall (103), which is arranged parallel to the third direction (Z), and the first wall (103) and the guide wall (100) together form the first hole segment (101).

4. The protective sheet welding fixture according to claim 3, characterized in that, The second hole segment (102) also has a second wall (104), which is arranged parallel to the third direction (Z), the first wall (103) and the second wall (104) are coplanar, and the second wall (104) forms the second hole segment (102).

5. The protective sheet welding fixture according to claim 2, characterized in that, The first hole segment (101) is provided with a chip removal groove (105) at one end near the second hole segment (102), and the chip removal groove (105) extends parallel to the first side surface (11).

6. The protective sheet welding fixture according to claim 5, characterized in that, The chip removal grooves (105) are provided in multiple ways, and the multiple chip removal grooves (105) are arranged circumferentially around the first hole section (101).

7. The protective sheet welding fixture according to claim 1, characterized in that, The receiving hole (10) is also provided with a foolproof part (106), which extends along the third direction (Z) and is spaced apart from the guide wall (100) along the first direction (X).

8. The protective sheet welding fixture according to claim 1, characterized in that, The cover plate body (1) has an isosceles trapezoidal shape with a wider top and a narrower bottom along the second direction (Y), and the width of the first side (11) in the second direction (Y) is greater than the width of the second side (12) in the second direction (Y).

9. The protective sheet welding fixture according to claim 1, characterized in that, The clamping part (2) is disposed at the end of the cover plate body (1) in the first direction (X), the receiving hole (10) is symmetrically distributed in the middle of the cover plate body (1) about the first direction (X), and the positioning hole (13) is arranged between the receiving hole (10) and the clamping part (2).

10. The protective sheet welding fixture according to claim 1, characterized in that, The clamping part (2) includes a column part (21) and a stop part (22). The column part (21) is disposed on the first side side (11) along the third direction (Z). The stop part (22) is fixedly connected to the end of the column part (21) away from the cover plate body (1).

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