A battery positive and negative electrode welding device

Abstract

The utility model relates to battery production technical field discloses a kind of battery positive and negative electrode welding equipment, including fixed mechanism and welding mechanism, the fixed mechanism is set to the below of the welding mechanism;The fixed mechanism includes positive fixed subassembly, negative fixed subassembly, first drive subassembly and second drive subassembly, the first drive subassembly is used to drive the positive fixed subassembly and the negative fixed subassembly along vertical direction movement, the second drive subassembly is used to drive the positive fixed subassembly and the negative fixed subassembly along horizontal direction movement;The positive fixed subassembly includes first fixed piece, the lower end of the first fixed piece is provided with first ram, and the first ram is Y type.The utility model plays the following technical effects: by setting the first ram of Y type, the three-spot welding of annular positive pole and positive pad can be realized, the contact stability of positive pole and positive pad and the electrical connection stability of steel shell battery and external equipment are improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery production technology, specifically relating to a battery positive and negative electrode welding device. Background Technology

[0002] Steel-cased batteries typically have a positive electrode post and a negative electrode contact at the top. While the conventional positive electrode post is usually circular, in certain production scenarios, to meet specific production needs and improve battery performance, the positive electrode post is sometimes designed as a ring. During the production of steel-cased batteries, the positive electrode post and negative electrode contact need to be welded to the positive and negative protection plate pads, respectively, to achieve electrical connection between the steel-cased battery and external devices. During the welding process of the positive electrode post, clamping jaws are used to press the positive electrode post into place, ensuring a tight fit between the positive electrode post and the positive electrode pad. This fixes the relative position between the positive electrode post and the positive electrode pad, preventing displacement during the welding process.

[0003] For conventional round positive terminals, U-shaped clamps are usually used. However, for annular positive terminals, using U-shaped clamps would reduce the exposed area on the terminal surface. This would mean that the welding mechanism could only perform two-point welding on the annular positive terminal at most. Two-point welding would result in fewer contact points between the positive terminal and the positive pad, thus affecting the contact stability between the positive terminal and the positive pad, and consequently affecting the electrical connection stability between the steel-cased battery and external devices. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a battery positive and negative electrode welding device. By setting a Y-shaped first pressure head and pressing it against the position of the annular positive electrode post during the battery positive electrode welding process, three-point welding between the annular positive electrode post and the positive electrode pad can be achieved, thereby increasing the contact points between the annular positive electrode post and the positive electrode pad, effectively improving the contact stability between the positive electrode post and the positive electrode pad, as well as the electrical connection stability between the steel-cased battery and external equipment.

[0005] The technical effects to be achieved by this utility model are realized through the following technical aspects: This utility model provides a battery positive and negative electrode welding device, including a fixing mechanism and a welding mechanism, wherein the fixing mechanism is disposed below the welding mechanism; The fixing mechanism includes a positive electrode fixing component, a negative electrode fixing component, a first driving component, and a second driving component. The positive electrode fixing component and the negative electrode fixing component are both connected to the driving end of the first driving component. The first driving component is used to drive the positive electrode fixing component and the negative electrode fixing component to move in the vertical direction. The fixing end of the first driving component is connected to the driving end of the second driving component. The second driving component is used to drive the positive electrode fixing component and the negative electrode fixing component to move in the horizontal direction. The positive electrode fixing component includes a first fixing member, and a first pressure head is provided at the lower end of the first fixing member. The first pressure head is Y-shaped.

[0006] As a further description of the technical solution of this utility model, the first pressing head is formed with a first pressing part, a second pressing part and a third pressing part, and the first pressing part, the second pressing part and the third pressing part are arranged in a triangle; A first welding position is formed between the first pressing part and the second pressing part, a second welding position is formed between the second pressing part and the third pressing part, and a third welding position is formed between the third pressing part and the first pressing part.

[0007] As a further description of the technical solution of this utility model, the negative electrode fixing component includes a second fixing member, and a second pressure head is provided at the lower end of the second fixing member. The second pressure head is U-shaped.

[0008] As a further description of the technical solution of this utility model, a first suction pipe is provided above the first pressure head, and a suction hole is provided on the side wall of the second pressure head, the suction hole being connected to the second suction pipe.

[0009] As a further description of the technical solution of this utility model, the positive electrode fixing component further includes a first buffer component connected between the driving end of the first driving component and the first fixing member, and the negative electrode fixing component further includes a second buffer component connected between the driving end of the first driving component and the second fixing member.

[0010] As a further description of the technical solution of this utility model, the driving end of the first driving component is provided with a spacing adjustment component, and both the positive electrode fixing component and the negative electrode fixing component are connected to the spacing adjustment component. The spacing adjustment component is used to adjust the relative distance between the positive electrode fixing component and the negative electrode fixing component.

[0011] As a further description of the technical solution of this utility model, the second driving component includes a first driving member for driving the positive electrode fixing component and the negative electrode fixing component to move along a first direction, and a second driving member for driving the positive electrode fixing component and the negative electrode fixing component to move along a second direction, wherein the first direction and the second direction are perpendicular to each other.

[0012] As a further description of the technical solution of this utility model, the welding mechanism includes a laser welding component and a third driving component that is drivenly connected to the laser welding component. The third driving component is used to drive the laser welding component to move closer to or away from the target welding position.

[0013] As a further description of the technical solution of this utility model, the third driving component includes a third driving member for driving the laser welding component to move in the horizontal direction, and a fourth driving member for driving the laser welding component to move in the vertical direction.

[0014] As a further description of the technical solution of this utility model, the battery positive and negative electrode welding equipment also includes a mounting frame, and both the fixing mechanism and the welding mechanism are disposed on the mounting frame. The number of fixing mechanisms is two, and the two fixing mechanisms are disposed side by side below the welding mechanism.

[0015] In summary, this utility model has at least the following advantages: The battery positive and negative electrode welding equipment provided by this utility model, by setting a Y-shaped first pressure head at the lower end of the first fixing component, and pressing the first pressure head against the position of the annular positive electrode post during the positive electrode welding process, exposes three weldable areas on the annular positive electrode post. The welding mechanism performs spot welding on these three weldable areas, achieving three-point welding between the annular positive electrode post and the positive electrode pad. This increases the contact points between the annular positive electrode post and the positive electrode pad, effectively improving the contact stability between the positive electrode post and the positive electrode pad, thereby enhancing the electrical connection stability between the steel-cased battery and external devices. Furthermore, the positive electrode fixing component and the negative electrode fixing component can move simultaneously under the drive of the first and second driving components, maintaining a fixed relative position between them. This allows for accurate alignment of the positive electrode fixing component and the negative electrode fixing component with the positive electrode post and the negative electrode contact piece, respectively. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the battery positive and negative electrode welding equipment according to Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the fixing mechanism in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the structure of the first pressure head in Embodiment 1 of this utility model; Figure 4 for Figure 2 Enlarged view of section A; Figure 5 This is a schematic diagram of the fixing mechanism in Embodiment 2 of this utility model; Figure 6 This is a schematic diagram of the battery positive and negative electrode welding equipment of Embodiment 3 of this utility model.

[0017] Marked in the image: 1. Fixing mechanism; 11. Positive electrode fixing assembly; 111. First fixing member; 112. First pressure head; 1121. First pressing part; 1122. Second pressing part; 1123. Third pressing part; 1124. First welding position; 1125. Second welding position; 1126. Third welding position; 113. First dust extraction pipe; 114. First buffer member; 12. Negative electrode fixing assembly; 121. Second fixing member; 122. Second pressure head; 1221. Suction hole; 123. Second dust extraction pipe; 124. Second buffer member; 13. First drive assembly; 14. Second drive assembly; 141. First drive member; 142. Second drive member; 15. Gap adjustment assembly; 2. Welding mechanism; 21. Laser welding assembly; 22. Third drive assembly; 221. Third drive component; 222. Fourth drive component; 3. Mounting bracket; X, first direction; Y, second direction. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] Example 1 refer to Figures 1 to 4The battery positive and negative electrode welding equipment provided in this embodiment includes a fixing mechanism 1 and a welding mechanism 2, with the fixing mechanism 1 disposed below the welding mechanism 2. The fixing mechanism 1 includes a positive electrode fixing component 11, a negative electrode fixing component 12, a first driving component 13, and a second driving component 14. Both the positive electrode fixing component 11 and the negative electrode fixing component 12 are connected to the driving end of the first driving component 13. The first driving component 13 is used to drive the positive electrode fixing component 11 and the negative electrode fixing component 12 to move simultaneously in the vertical direction. The fixing end of the first driving component 13 is connected to the driving end of the second driving component 14, which is used to drive the positive electrode fixing component 11 and the negative electrode fixing component 12 to move simultaneously in the horizontal direction.

[0021] Before the welding mechanism 2 performs the welding operation, the second drive assembly 14 first drives the positive electrode fixing assembly 11 and the negative electrode fixing assembly 12 to be directly above the positive electrode post and the negative electrode contact piece, respectively. Then, the first drive assembly 13 drives the positive electrode fixing assembly 11 and the negative electrode fixing assembly 12 to move downwards simultaneously and press them onto the positions of the positive electrode post and the negative electrode contact piece, respectively. It should be noted that the steel-cased battery fed into the battery positive and negative electrode welding equipment already has positive electrode pads and negative electrode pads placed at the positions of the positive electrode post and the negative electrode contact piece, respectively. By pressing and fixing the positive electrode fixing assembly 11 and the negative electrode fixing assembly 12, the positive electrode pads can be attached to the upper surface of the positive electrode post and the negative electrode pads can be attached to the upper surface of the negative electrode contact piece, so that the welding mechanism 2 can perform the welding operation subsequently. Driven by the first driving component 13 and the second driving component 14, the positive electrode fixing component 11 and the negative electrode fixing component 12 can move simultaneously, ensuring the fixation of the relative position between the positive electrode fixing component 11 and the negative electrode fixing component 12. This enables the positive electrode fixing component 11 and the negative electrode fixing component 12 to be accurately aligned with the positive electrode post and the negative electrode contact piece, respectively, which is beneficial to improving the welding quality.

[0022] The positive electrode fixing assembly 11 includes a first fixing member 111, and a first pressure head 112 is provided at the lower end of the first fixing member 111. The first pressure head 112 is Y-shaped. It can be understood that when the first pressure head 112 is pressed against the position of the annular positive electrode post, the annular positive electrode post can expose three weldable areas. By spot welding the three weldable areas through the welding mechanism 2, three-point welding between the annular positive electrode post and the positive electrode pad can be achieved, which increases the contact points between the annular positive electrode post and the positive electrode pad and effectively improves the contact stability between the positive electrode post and the positive electrode pad, thereby helping to improve the electrical connection stability between the steel-cased battery and external devices.

[0023] Specifically, the first pressing head 112 has a first pressing part 1121, a second pressing part 1122, and a third pressing part 1123, which are arranged in a triangular pattern. A first welding position 1124 is formed between the first pressing part 1121 and the second pressing part 1122, a second welding position 1125 is formed between the second pressing part 1122 and the third pressing part 1123, and a third welding position 1126 is formed between the third pressing part 1123 and the first pressing part 1121.

[0024] When the first pressure head 112 presses against the position of the annular positive electrode post, the first pressing part 1121, the second pressing part 1122, and the third pressing part 1123 all abut against the positive electrode pad and the annular positive electrode post. The first welding position 1124, the second welding position 1125, and the third welding position 1126 correspond to the exposed weldable areas of the annular positive electrode post. By using the welding mechanism 2 to perform spot welding on the weldable areas corresponding to the first welding position 1124, the second welding position 1125, and the third welding position 1126 in sequence, the three-point welding between the positive electrode post and the positive electrode pad can be achieved.

[0025] In some embodiments, the negative electrode fixing assembly 12 includes a second fixing member 121, the lower end of which is provided with a second pressure head 122, which is U-shaped. Since the negative electrode contact piece is generally quadrilateral, by using the U-shaped second pressure head 122 to press and fix the position of the negative electrode contact piece, the central area of ​​the negative electrode contact piece can be exposed. The welding mechanism 2 can perform arbitrary multi-point welding in the central area of ​​the negative electrode contact piece, thereby ensuring the contact stability between the negative electrode contact piece and the negative electrode pad.

[0026] In some embodiments, since there is a certain height difference between the positive electrode post and the negative electrode contact piece, the height difference between the first pressure head 112 and the second pressure head 122 can be set to match the height difference between the positive electrode post and the negative electrode contact piece, thereby ensuring that the first pressure head 112 and the second pressure head 122 can be fully pressed against the positive electrode post and the negative electrode contact piece respectively.

[0027] As a further optimization, a first suction pipe 113 is provided above the first pressure head 112, and a suction hole 1221 is opened on the side wall of the second pressure head 122, which is connected to a second suction pipe 123. The first suction pipe 113 and the second suction pipe 123 can be connected to an external suction device. The first suction pipe 113 can promptly remove welding debris generated during the welding operation of the welding mechanism 2 on the positive electrode post, and the second suction pipe 123 can promptly remove welding debris generated during the welding operation of the welding mechanism 2 on the negative electrode contact piece, thereby maintaining the cleanliness of the battery production environment.

[0028] As a further optimization, the positive electrode fixing assembly 11 also includes a first buffer 114 connected between the driving end of the first driving assembly 13 and the first fixing member 111, and the negative electrode fixing assembly 12 also includes a second buffer 124 connected between the driving end of the first driving assembly 13 and the second fixing member 121. The first buffer 114 can reduce the pressure force on the positive electrode post when the first pressure head 112 moves downward, preventing the positive electrode post from being damaged. The second buffer 124 can reduce the pressure force on the negative electrode contact piece when the second pressure head 122 moves downward, preventing the negative electrode contact piece from deforming and affecting electrical contact.

[0029] In one embodiment, the first buffer 114 may include a connecting seat, a guide rail, and a buffer spring. The connecting seat is connected to the driving end of the first driving assembly 13. The guide rail is vertically disposed on the connecting seat. The first fixing member 111 is slidably connected to the guide rail. The buffer spring is connected between the first fixing member 111 and the connecting seat. The springing direction of the buffer spring is parallel to the sliding direction of the first fixing member 111. The structure of the second buffer 124 is the same as that of the first buffer 114.

[0030] Example 2 As a further optimization of Example 1, refer to Figure 5 The first drive assembly 13 is provided with a spacing adjustment assembly 15 at its drive end. The positive electrode fixing assembly 11 and the negative electrode fixing assembly 12 are both connected to the spacing adjustment assembly 15. The spacing adjustment assembly 15 is used to adjust the relative distance between the positive electrode fixing assembly 11 and the negative electrode fixing assembly 12, so as to adapt to steel-cased batteries with different spacing between the positive electrode post and the negative electrode contact piece, thereby improving the versatility of the battery positive and negative electrode welding equipment.

[0031] In one embodiment, the spacing adjustment component 15 may include a double helix link, with the positive electrode fixing component 11 and the negative electrode fixing component 12 respectively screwed to the two ends of the double helix link. Since the threads at the two ends of the double helix link turn in opposite directions, the positive electrode fixing component 11 and the negative electrode fixing component 12 can be moved closer or further apart by rotating the double helix link in opposite directions, thereby changing the relative distance between the positive electrode fixing component 11 and the negative electrode fixing component 12.

[0032] In some embodiments, the second driving assembly 14 includes a first driving member 141 for driving the positive electrode fixing assembly 11 and the negative electrode fixing assembly 12 to move along a first direction X, and a second driving member 142 for driving the positive electrode fixing assembly 11 and the negative electrode fixing assembly 12 to move along a second direction Y, wherein the first direction X and the second direction Y are perpendicular to each other. Through the cooperation of the first driving member 141 and the second driving member 142, precise horizontal positioning of the positive electrode fixing assembly 11 and the negative electrode fixing assembly 12 can be achieved, thereby ensuring precise alignment of the positive electrode fixing assembly 11 and the negative electrode fixing assembly 12 with the positive electrode post and the negative electrode contact piece, respectively. In this embodiment, the first driving assembly 13 is a driving cylinder, and both the first driving member 141 and the second driving member 142 are electric slides.

[0033] Example 3 As a further optimization of Example 2, refer to Figure 6 The welding mechanism 2 includes a laser welding assembly 21 and a third driving assembly 22 driven by the laser welding assembly 21. The third driving assembly 22 is used to drive the laser welding assembly 21 closer to or further away from the target welding position. The third driving assembly 22 can be a robotic arm or a driving module. In this embodiment, the third driving assembly 22 includes a third driving member 221 for driving the laser welding assembly 21 to move horizontally, and a fourth driving member 222 for driving the laser welding assembly 21 to move vertically. Both the third driving member 221 and the fourth driving member 222 can be a drive motor or a drive cylinder.

[0034] In some embodiments, the battery positive and negative electrode welding equipment also includes a mounting frame 3, with both the fixing mechanism 1 and the welding mechanism 2 mounted on the mounting frame 3. There are two fixing mechanisms 1, which are arranged side by side below the welding mechanism 2. The laser welding assembly 21 can operate between the two fixing mechanisms 1 under the drive of the third driving assembly 22, thereby improving the welding efficiency of the battery positive and negative electrodes and thus improving battery production efficiency.

[0035] 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 mechanical connection or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A battery positive and negative electrode welding device, characterized in that, It includes a fixing mechanism (1) and a welding mechanism (2), wherein the fixing mechanism (1) is disposed below the welding mechanism (2); The fixing mechanism (1) includes a positive electrode fixing component (11), a negative electrode fixing component (12), a first driving component (13), and a second driving component (14). The positive electrode fixing component (11) and the negative electrode fixing component (12) are both connected to the driving end of the first driving component (13). The first driving component (13) is used to drive the positive electrode fixing component (11) and the negative electrode fixing component (12) to move in the vertical direction. The fixing end of the first driving component (13) is connected to the driving end of the second driving component (14). The second driving component (14) is used to drive the positive electrode fixing component (11) and the negative electrode fixing component (12) to move in the horizontal direction. The positive electrode fixing component (11) includes a first fixing member (111), and a first pressure head (112) is provided at the lower end of the first fixing member (111). The first pressure head (112) is Y-shaped.

2. The battery positive and negative electrode welding equipment according to claim 1, characterized in that, The first pressure head (112) has a first pressing part (1121), a second pressing part (1122) and a third pressing part (1123) formed thereon, and the first pressing part (1121), the second pressing part (1122) and the third pressing part (1123) are arranged in a triangular pattern. A first welding position (1124) is formed between the first pressing part (1121) and the second pressing part (1122), a second welding position (1125) is formed between the second pressing part (1122) and the third pressing part (1123), and a third welding position (1126) is formed between the third pressing part (1123) and the first pressing part (1121).

3. The battery positive and negative electrode welding equipment according to claim 1, characterized in that, The negative electrode fixing component (12) includes a second fixing member (121), and a second pressure head (122) is provided at the lower end of the second fixing member (121). The second pressure head (122) is U-shaped.

4. The battery positive and negative electrode welding equipment according to claim 3, characterized in that, A first suction pipe (113) is provided above the first pressure head (112), and a suction hole (1221) is provided on the side wall of the second pressure head (122), and the suction hole (1221) is connected to the second suction pipe (123).

5. The battery positive and negative electrode welding equipment according to claim 3, characterized in that, The positive electrode fixing component (11) further includes a first buffer (114) connected between the driving end of the first driving component (13) and the first fixing member (111), and the negative electrode fixing component (12) further includes a second buffer (124) connected between the driving end of the first driving component (13) and the second fixing member (121).

6. The battery positive and negative electrode welding equipment according to claim 1, characterized in that, The first driving component (13) is provided with a spacing adjustment component (15) at its driving end. The positive electrode fixing component (11) and the negative electrode fixing component (12) are both connected to the spacing adjustment component (15). The spacing adjustment component (15) is used to adjust the relative distance between the positive electrode fixing component (11) and the negative electrode fixing component (12).

7. The battery positive and negative electrode welding equipment according to claim 1, characterized in that, The second drive assembly (14) includes a first drive member (141) for driving the positive electrode fixing assembly (11) and the negative electrode fixing assembly (12) to move along a first direction (X), and a second drive member (142) for driving the positive electrode fixing assembly (11) and the negative electrode fixing assembly (12) to move along a second direction (Y), wherein the first direction (X) and the second direction (Y) are perpendicular to each other.

8. The battery positive and negative electrode welding equipment according to claim 1, characterized in that, The welding mechanism (2) includes a laser welding assembly (21) and a third driving assembly (22) connected to the laser welding assembly (21). The third driving assembly (22) is used to drive the laser welding assembly (21) to move closer to or away from the target welding position.

9. The battery positive and negative electrode welding equipment according to claim 8, characterized in that, The third drive assembly (22) includes a third drive member (221) for driving the laser welding assembly (21) to move in the horizontal direction, and a fourth drive member (222) for driving the laser welding assembly (21) to move in the vertical direction.

10. The battery positive and negative electrode welding equipment according to claim 1, characterized in that, It also includes a mounting frame (3), on which both the fixing mechanism (1) and the welding mechanism (2) are mounted. There are two fixing mechanisms (1), which are arranged side by side below the welding mechanism (2).

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