Solder strip flattening device

Abstract

The utility model relates to a welding strip flattening device. The welding strip flattening device comprises a base, an upper pressing head, a motor and an eccentric structure. The upper pressing head is movably arranged on the base and is opposite to a flattening station on the base; the output end of the motor is connected with the eccentric structure, and the motor is configured to drive the eccentric structure to rotate so that the upper pressing head can abut against the flattening station in a reciprocating mode. The welding strip flattening device provided by the utility model can ensure the consistency of the flattening thickness of the welding strip.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and more specifically, to a welding strip flattening device. Background Technology

[0002] Existing welding strip flattening devices typically use a cylinder to drive a connecting rod to rotate, with the lower end of the connecting rod pressing down to flatten the welding strip. However, the stability of the cylinder's output force is affected by fluctuations in the air source pressure, resulting in relatively low motion accuracy of the connecting rod mechanism and affecting the consistency of the welding strip thickness after flattening. Utility Model Content

[0003] One object of this invention is to provide a strip flattening device to at least solve one of the problems in the prior art.

[0004] According to one aspect of the present invention, a strip flattening device is provided, comprising:

[0005] A base and an upper pressure head, wherein the upper pressure head is movably mounted on the base and is positioned opposite to the flattening station on the base;

[0006] The motor and the eccentric structure are configured such that the upper pressure head can reciprocate against the flattening station by driving the eccentric structure to rotate.

[0007] Optionally, the upper pressure head has an initial position and a flattened position;

[0008] When the upper pressure head is in the initial position, the rotation center of the eccentric structure is close to the upper pressure head, and the upper pressure head is disengaged from the flattening station;

[0009] When the upper pressure head is in the flattening position, the rotation center of the eccentric structure is away from the upper pressure head, and the upper pressure head presses against the flattening station.

[0010] Optionally, the eccentric structure is an eccentric wheel or a cam.

[0011] Optionally, it also includes a first elastic element, which is sleeved on the upper pressure head. The first end of the upper pressure head contacts the outer contour of the eccentric structure, and the second end is opposite to the flattening station.

[0012] When the upper pressure head presses against the flattening station, the first elastic element is in a compressed state; when the upper pressure head leaves the flattening station, the first elastic element is in a pre-compressed state.

[0013] Optionally, it also includes a bushing, the bushing being fixed to the base, and the upper pressure head being movably inserted into the bushing;

[0014] The first end of the upper pressure head is provided with a limiting part, and the first elastic element is pre-pressed between the limiting part and the bushing.

[0015] Optionally, it also includes a lower pressure head and a second elastic element. The lower pressure head is movably disposed on the base through the second elastic element. The lower pressure head is located at the flattening station, so that the upper pressure head can press against the lower pressure head.

[0016] Optionally, when the upper pressure head presses against the lower pressure head, the lower pressure head is flush with the bearing surface of the base.

[0017] Optionally, it also includes a guide structure fixed to the base for guiding the welding strip to the lower pressure head.

[0018] Optionally, the system also includes a speed reducer, the output end of the motor being connected to the speed reducer, the speed reducer having a drive shaft that is connected to the eccentric structure in a transmission manner.

[0019] Optionally, the drive shaft of the reducer is rotatably mounted on the base via a bearing housing, and the eccentric structure is fixed to the drive shaft;

[0020] Multiple upper pressure heads are provided, and the multiple upper pressure heads are movably disposed on the base corresponding to the eccentric structure. Multiple flattening stations are arranged opposite to the upper pressure heads.

[0021] One technical advantage of this invention is that it uses a motor to drive the rotation of an eccentric structure, enabling the upper pressure head to reciprocate against or disengage from the flattening station, thereby achieving the purpose of flattening the welding strip. The motor has high output precision, and the transmission through the eccentric structure ensures the stability of the flattening force of the upper pressure head, guaranteeing the consistency of the welding strip's thickness during flattening.

[0022] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0023] The accompanying drawings, which form part of this specification, illustrate embodiments of the present invention and, together with the specification, serve to explain the principles of the present invention.

[0024] Figure 1 This is a schematic diagram of the structure of a welding strip flattening device provided by this utility model.

[0025] Figure 2 yes Figure 1 Sectional view at point AA.

[0026] Figure 3 yes Figure 1 Side view.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Motor; 2. Reducer; 3. Eccentric structure; 4. Bearing housing; 5. Upper pressure head; 51. Limiting part; 6. Base; 7. Guide structure; 8. Drive shaft; 9. First elastic element; 10. Bushing; 11. Lower pressure head; 12. Second elastic element; 13. Key. Detailed Implementation

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0031] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0032] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0034] In photovoltaic cell production, photovoltaic cells are composed of multiple cells connected in series by solder strips, with the cells and solder strips arranged in an alternating vertical order. Using circular cross-section solder strips to weld the cells results in extremely high bending deflection and pressure on the cells during subsequent cell string lamination. Due to the thin and brittle structure of the cells, cracks and breakage are prone to occur. Therefore, the solder strips need to be flattened before welding to the cells.

[0035] like Figures 1 to 3 As shown, according to one aspect of the present invention, a strip flattening device is provided, comprising: a base 6, an upper pressing head 5, a motor 1, and an eccentric structure 3; the upper pressing head 5 is movably disposed on the base 6 and is disposed opposite to the flattening station on the base 6; the output end of the motor 1 is connected to the eccentric structure 3, and the motor 1 is configured to drive the eccentric structure 3 to rotate, so that the upper pressing head 5 can reciprocate against the flattening station.

[0036] Specifically, in this embodiment, the eccentric structure 3 is rotated by the motor 1, which allows the upper pressure head 5 to press against or move away from the flattening station, thus achieving the function of reciprocating flattening of the welding strip. The motor 1 can be a servo motor 1, which can precisely control the rhythm and force of the welding strip flattening, greatly ensuring the consistency of the thickness after flattening, improving the welding quality of the welding strip, creating favorable conditions for subsequent battery string lamination, and reducing the probability of battery cell damage during the lamination process. The transmission method of the eccentric structure 3 optimizes the structure of the flattening device; compared to traditional linkage mechanisms, its structure is simpler and more compact, reducing control difficulty while ensuring motion accuracy.

[0037] In the above embodiment, the rotation center of the eccentric structure 3 is located at a non-central position. Driven by the motor 1, it rotates and, through contact with the upper pressure head 5, enables the upper pressure head 5 to reciprocate, thereby reciprocating to press against or disengage from the flattening station. The flattening station is located on the base 6, which can be a region on the base 6 corresponding to the upper pressure head 5, or a structural component on the base 6 corresponding to the upper pressure head 5. After pressing against the flattening station, the upper pressure head 5 can continue to be driven back to the disengagement position by the deflection structure, or it can rebound to the disengagement position by elastic elements, etc. That is, the upper pressure head 5 and the eccentric structure 3 can be connected to each other, or they can only be in contact with each other, designed as a split structure, which can be designed according to actual needs.

[0038] Optionally, such as Figures 1 to 2 As shown, the upper pressing head 5 has an initial position and a flattening position; when the upper pressing head 5 is in the initial position, the rotation center of the eccentric structure 3 is close to the upper pressing head 5, and the upper pressing head 5 is disengaged from the flattening position; when the upper pressing head 5 is in the flattening position, the rotation center of the eccentric structure 3 is far away from the upper pressing head 5, and the upper pressing head 5 is pressed against the flattening position.

[0039] Specifically, in practical applications, the outer contour of the eccentric structure 3 typically has a near-repose point closest to the center of rotation and a far-repose point furthest from the center of rotation. In the initial position, the upper pressure head 5 contacts the near-repose point and is far from the flattening station, thus creating space between the upper pressure head 5 and the flattening station for placing the welding strip.

[0040] When the welding strip is placed in the flattening station, motor 1 is started. The output of motor 1 drives the eccentric structure 3 to rotate, causing the upper pressure head 5 to perform a pushing motion, that is, to move towards the flattening station and compress the welding strip. When the far end point of the eccentric structure 3 rotates to contact the upper pressure head 5, the upper pressure head 5 reaches its low position, so that the welding strip is completely flattened. After the welding strip is flattened, motor 1 continues to rotate, and the upper pressure head 5 can perform a return motion under the drive of the eccentric structure 3 or under the action of other elastic elements, so as to disengage from the flattening station and return to its initial position.

[0041] Setting the initial position to the point where the upper pressure head 5 leaves the flattening station facilitates the placement and removal of the welding strip, and also reduces the energy consumption of the device.

[0042] Optionally, such as Figure 2 As shown, the eccentric structure 3 is an eccentric wheel or a cam. Both the eccentric wheel and cam structures have a far repose point and a near repose point, and are easy to connect to the motor 1 for transmission. They are simple and compact in structure, reducing the control difficulty of the upper pressure head 5 while ensuring its motion accuracy. In one embodiment, the output end of the motor 1 can be connected to the eccentric wheel or cam via a key 13.

[0043] Optionally, such as Figure 2 As shown, the strip flattening device also includes a first elastic element 9, which is sleeved on the upper pressure head 5. The first end of the upper pressure head 5 contacts the outer contour of the eccentric structure 3, and the second end is opposite to the flattening station. When the upper pressure head 5 presses against the flattening station, the first elastic element 9 is in a compressed state. When the upper pressure head 5 is removed from the flattening station, the first elastic element 9 is in a pre-compressed state.

[0044] Specifically, in this embodiment, the first end of the upper pressure head 5 contacts the eccentric structure 3, and the second end is opposite to the flattening station, so that when the eccentric structure 3 rotates, it can move towards the flattening station, thereby achieving the purpose of pressing the welding strip. During this process, the first elastic element 9 is gradually compressed, which can play a certain buffering role in the upper pressure head 5 pressing against the flattening station, avoiding damage to the welding strip due to excessive impact force.

[0045] Furthermore, as the contact point between the eccentric structure 3 and the upper pressure head 5 rotates from the far rest point to the near rest point, the first elastic element 9 also returns from the compressed state to the pre-compressed state, simultaneously allowing the upper pressure head 5 to return to the flattening position. The flattening thickness of the welding strip can be adjusted by changing the pre-tightening force of the first elastic element 9 or the contour dimensions of the eccentric structure 3 to adjust the flattening position of the upper pressure head 5. The first elastic element 9 typically employs compressive elasticity.

[0046] Optionally, such as Figure 2As shown, the welding strip flattening device also includes a bushing 10, which is fixed on the base 6, and the upper pressure head 5 is movably inserted into the bushing 10; the first end of the upper pressure head 5 is provided with a limiting part 51, and the first elastic member 9 is pre-pressed between the limiting part 51 and the bushing 10.

[0047] Specifically, the bushing 10 is fixed to the base 6, the upper pressure head 5 passes through the bushing 10, and both ends of the first elastic member 9 abut against the limiting part 51 and the bushing 10 respectively, so as to realize the movable connection between the upper pressure head 5 and the base 6, and to realize the first elastic member 9 to drive the upper pressure head 5 away from the flattening position. The bushing 10 can reduce the friction between the upper pressure head 5 and the base 6, which is beneficial to the reciprocating movement of the upper pressure head 5, and also plays a certain limiting role for the first elastic member 9. The limiting part 51 can be designed as a nut fixed on the upper pressure head 5, which can limit the other end of the first elastic member 9.

[0048] Optionally, such as Figure 2 As shown, the welding strip flattening device also includes a lower pressure head 11 and a second elastic element 12. The lower pressure head 11 is movably disposed on the base 6 through the second elastic element 12. The lower pressure head 11 is located at the flattening station, so that the upper pressure head 5 can press against the lower pressure head 11.

[0049] Specifically, in practical applications, for the support of the welding strip in this embodiment, a lower pressure head 11 can be movably designed on the base 6, so that the upper pressure head 5 can flatten the welding strip by pressing against the lower pressure head 11. The design of the lower pressure head 11 facilitates the positioning and flattening of the welding strip, while the provision of the second elastic element 12 allows the lower pressure head 11 to be movably mounted on the base 6. When the upper pressure head 5 presses against the lower pressure head 11, the second elastic element 12 can absorb the impact vibration generated during the flattening process of the welding strip, avoiding damage to the motor 1 or other components, and improving the safety of the equipment and the flattening of the welding strip.

[0050] In the above embodiments, the second elastic element 12 can be a butterfly spring, which is a spring washer in the shape of a conical disc. It can be used individually or in series or in parallel. It has the advantages of heavy load, short stroke and small space requirement, and is suitable for compact assembly between the pressure head 11 and the base 6.

[0051] Optionally, such as Figure 2 As shown, when the upper pressure head 5 presses against the lower pressure head 11, the lower pressure head 11 is flush with the bearing surface of the base 6.

[0052] Specifically, in practical applications, when the upper pressure head 5 presses against the lower pressure head 11, the lower pressure head 11, under the action of the upper pressure head 5, compresses the second elastic element 12 and continues to move closer to the base 6. The elasticity of the second elastic element 12 causes the lower pressure head 11 to eventually be pressed flush with the bearing surface of the base 6. This achieves both flattening of the welding strip and ensures its straightness, preventing bending and damage, thus guaranteeing the quality of the flattened welding strip. The bearing surface of the base 6 is the plane used to assemble the lower pressure head 11, which provides a certain bearing capacity for the flattened welding strip.

[0053] Optionally, such as Figures 1 to 3 As shown, the welding strip flattening device also includes a guide structure 7, which is fixed on the base 6 and is used to guide the welding strip to the lower pressure head 11.

[0054] Specifically, in practical applications, the guide structure 7 facilitates the fixing of the welding strip onto the lower pressure head 11, and facilitates the conveying and positioning of the welding strip. The guide structure 7 can be designed as a guide groove structure formed by an upper guide plate and a lower guide plate. The size of the guide groove structure matches the size of the welding strip, facilitating positioning and ensuring the welding strip remains on the lower pressure head 11 at all times.

[0055] Optionally, such as Figure 1 As shown, the strip flattening device also includes a speed reducer 2. The output end of the motor 1 is connected to the speed reducer 2. The speed reducer 2 has a drive shaft 8, which is connected to the eccentric structure 3 in a transmission connection.

[0056] Specifically, in practical applications, the speed reducer 2 can reduce the speed of the transmission between the motor 1 and the eccentric device, so that the high-speed output of the motor 1 is converted into the low-speed rotation of the transmission shaft 8, while increasing the torque of the transmission shaft 8. This makes it easier to control the rotation of the eccentric structure 3 to suit the rhythm of flattening the welding strip, and to ensure the motion accuracy of the upper pressure head 5.

[0057] Optionally, such as Figure 1 and Figure 3 As shown, the drive shaft 8 of the reducer 2 is rotatably mounted on the base 6 via the bearing seat 4, and the eccentric structure 3 is fixed on the drive shaft 8; multiple upper pressure heads 5 are provided, and the multiple upper pressure heads 5 are movably arranged on the base 6 corresponding to the eccentric structure 3, and multiple flattening stations are arranged opposite to the upper pressure heads 5.

[0058] Specifically, in practical applications, in order to improve the flattening efficiency of welding strips, multiple upper pressure heads 5 and corresponding flattening stations can be set up at the same time. Through the rotation of motor 1 and the transmission of reducer 2 and eccentric structure 3, multiple upper pressure heads 5 can simultaneously reciprocate against the corresponding flattening stations, thereby achieving the simultaneous flattening of multiple welding strips, reducing flattening costs and improving flattening efficiency.

[0059] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0060] While specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A strip flattening device, characterized in that, include: A base and an upper pressure head, wherein the upper pressure head is movably mounted on the base and is positioned opposite to the flattening station on the base; The motor and the eccentric structure, wherein the output end of the motor is connected to the eccentric structure, and the motor is configured to drive the eccentric structure to rotate, so that the upper pressure head can reciprocate against the flattening station; The lower pressure head and the second elastic element are provided. The lower pressure head is movably mounted on the base through the second elastic element. The lower pressure head is located at the flattening station, so that the upper pressure head can press against the lower pressure head.

2. The strip flattening device according to claim 1, characterized in that, The upper pressure head has an initial position and a flattened position; When the upper pressure head is in the initial position, the rotation center of the eccentric structure is close to the upper pressure head, and the upper pressure head is disengaged from the flattening station; When the upper pressure head is in the flattening position, the rotation center of the eccentric structure is away from the upper pressure head, and the upper pressure head presses against the flattening station.

3. The strip flattening device according to claim 1, characterized in that, The eccentric structure is an eccentric wheel or a cam.

4. The strip flattening device according to claim 1, characterized in that, It also includes a first elastic element, which is sleeved on the upper pressure head. The first end of the upper pressure head contacts the outer contour of the eccentric structure, and the second end is opposite to the flattening station. When the upper pressure head presses against the flattening station, the first elastic element is in a compressed state; when the upper pressure head leaves the flattening station, the first elastic element is in a pre-compressed state.

5. The strip flattening device according to claim 4, characterized in that, It also includes a bushing, which is fixed to the base, and the upper pressure head is movably inserted into the bushing; The first end of the upper pressure head is provided with a limiting part, and the first elastic element is pre-pressed between the limiting part and the bushing.

6. The strip flattening device according to claim 1, characterized in that, When the upper pressure head presses against the lower pressure head, the lower pressure head is flush with the bearing surface of the base.

7. The strip flattening device according to claim 1, characterized in that, It also includes a guide structure, which is fixed to the base and is used to guide the welding strip to the lower pressure head.

8. The strip flattening device according to claim 1, characterized in that, It also includes a speed reducer, the output end of the motor is connected to the speed reducer, the speed reducer has a drive shaft, and the drive shaft is connected to the eccentric structure in a transmission connection.

9. The strip flattening device according to claim 8, characterized in that, The drive shaft of the reducer is rotatably mounted on the base via a bearing seat, and the eccentric structure is fixed to the drive shaft; Multiple upper pressure heads are provided, and the multiple upper pressure heads are movably disposed on the base corresponding to the eccentric structure. Multiple flattening stations are arranged opposite to the upper pressure heads.

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