Pressing tool
By setting an extension piece at the end of the pressure pin row of the clamping fixture, the deformation problem caused by the lifting of the traction end of the welding strip was solved, thus achieving stable clamping of the welding strip and high-quality welding.
Patent Information
- Application Number
- CN202423061102.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-11
AI Technical Summary
In the existing clamping fixture, the pulled end of the welding strip is prone to lifting during the welding strip clamping process, which causes the welding strip to deform and affects the product yield.
An elevating element, such as a gasket or an elevating platform, is installed at one end of the pressure needle row to raise the height of the pressure needles to match the raised end of the solder strip, ensuring effective contact between the pressure needle row and the solder strip and avoiding deformation caused by uneven force.
By adding height-adjusting components, stable contact between the pressure pin array and the welding strip is achieved, preventing welding strip deformation and improving welding quality and production efficiency.
Smart Images
Figure CN223656319U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photovoltaic equipment manufacturing field especially, relate to a compression tool. BACKGROUND
[0002] In the battery assembly production process, there is a process of stacking and welding battery piece and welding strip to form a battery string, wherein, when the battery piece and the welding strip are stacked, a compression tool is needed to compress and position the welding strip. At present, the compression tool for compressing the welding strip usually comprises a tool frame and a plurality of rows of compression pins elastically mounted on the tool frame, and each row of compression pins corresponds to compressing one welding strip.
[0003] However, the current compression pin setting has problems: the welding strip is laid under the compression tool through a traction device, because the traction end of the traction device has a certain height, the traction end of the welding strip will be raised upward. And before the compression tool compacts the welding strip (i.e. before the whole row of compression pins completely abuts against the welding strip), the traction device will keep clamping the welding strip to assist positioning and avoid the welding strip from shifting, which causes the traction end of the welding strip to keep the state of being raised upward when the compression tool compresses. If the compression pins of the compression pin row are all of the same height, the traction end of the welding strip will be subjected to a compression force higher than the middle part of the welding strip during the compression of the welding strip, which deforms the welding strip and reduces the yield of the product. SUMMARY
[0004] The utility model aims at: provide a compression tool to solve the problem that the welding strip compression tool in the prior art easily deforms the traction end of the welding strip.
[0005] The technical scheme of the utility model is: a compression tool is used for positioning when welding strip and battery piece are welded, comprising a substrate and a compression pin row, the compression pin row comprises a plurality of compression pins arranged in a straight line direction, any compression pin penetrates the substrate and has an axis perpendicular to the plane where the substrate is located;
[0006] The compression pin has a connecting end and an abutting end, the connecting end is fixed with a locking piece, and the locking piece is directly or indirectly abutted against the substrate by sleeving an elastic piece on the side of the compression pin;
[0007] The connecting end side of the compression pin formed at least one end of the compression pin row is provided with a heightening piece, the heightening piece is arranged between the locking piece and the substrate, and is used for lifting the compression pin.
[0008] Preferably, the heightening piece is arranged as a grommet, and the grommet is sleeved on the side of the compression pin.
[0009] Preferably, the heightening piece is arranged as a heightening table which is integrally formed with the substrate and extends towards the connecting end.
[0010] Preferably, the substrate comprises a tool frame, the tool frame integrally forming an installation part perpendicular to an axis, and the pressing needle is inserted into the installation part.
[0011] Preferably, the installation part coaxially has a through hole and a blind hole along the axis, the connecting end is matched with the locking member after penetrating the through hole, and the blind hole is used for accommodating the elastic member, and two ends of the elastic member are respectively abutted against the step surface adjacent to the abutting end.
[0012] Preferably, the elastic member is any one of a compression spring or a flexible sleeve.
[0013] Preferably, the tool frame has a hollow part, and the hollow part is formed on the circumferential side of the pressing needle.
[0014] Preferably, the tool frame has a connecting plate made of a magnetic material, and the connecting plate has a flexible pad at one end close to the solder strip.
[0015] Compared with the prior art, the application has the following advantages: the height of the pressing needle at the end of the pressing needle row is raised by the heightening member to adapt to the solder strip that is lifted at the pulled end. When the pressing needle row and the solder strip abut against each other, not only the pressing needle at the middle of the pressing needle row can smoothly and effectively contact the middle of the solder strip, but also the pressing needle at the end adjusted by the heightening member can simultaneously and stably abut against the solder strip at the pulled end. The deformation of the solder strip caused by uneven stress during pressing is avoided, thereby effectively improving the welding quality and production efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0016] The application will be further described below in combination with the drawings and embodiments:
[0017] Figure 1 FIG. 1 is a structural diagram of the pressing tool according to the application;
[0018] Figure 2 FIG. 2 is a sectional view of A-A in FIG. 1; Figure 1
[0019] FIG. 3 is an enlarged view of B in FIG. 1; Figure 3 Figure 2 FIG. 4 is an enlarged view of C in FIG. 1;
[0020] Figure 4 Figure 3 FIG. 5 is a bottom view of the pressing tool according to the application;
[0021] Figure 5 FIG. 6 is a structural diagram of another embodiment of the application;
[0022] Figure 6 FIG. 7 is a structural diagram of another embodiment of the application;
[0023] Wherein: 11, welding strip, 12, battery piece, 2, base plate, 21, tool frame, 22, mounting portion, 221, through hole, 222, blind hole, 23, elastic piece, 24, hollow part, 25, connecting plate, 26, flexible pad, 3, pressing needle, 31, connecting end, 32, abutting end, 4, heightening piece, 4a, gasket, 4b, heightening table, 5, locking piece. DETAILED DESCRIPTION
[0024] The content of the utility model will be further described in detail below in combination with specific embodiments:
[0025] As shown in Figure 1 and Figure 2 , a pressing tool is used for pressing and positioning the welding strip 11 and the battery piece 12 during welding. The tool includes a base plate 2 and a pressing needle array, the pressing needle array includes a plurality of pressing needles 3 arranged in a straight line direction, any pressing needle 3 penetrates the base plate 2 and has an axis perpendicular to the plane where the base plate 2 is located. The upper and lower ends of the pressing needle 3 are respectively provided as a connecting end 31 and an abutting end 32, the connecting end 31 is fixed with a locking piece 5, and the circumferential side of the pressing needle 3 is sleeved with an elastic piece 23, and the pressing needle 3 is arranged on the base plate 2 through the locking piece 5 and the elastic piece 23. The abutting end 32 of the pressing needle 3 is used for pressing the welding strip 11, and when the welding strip 11 is pressed, the elastic piece 23 arranged thereon can make the pressing needle 3 move along the axial direction, so that the plurality of pressing needles 3 can simultaneously abut against the welding strip 11, thereby pressing the welding strip 11.
[0026] Specifically, as shown in Figure 3 and Figure 4 , the base plate 2 includes a tool frame 21, the tool frame 21 is integrally formed with an axis perpendicular mounting portion 22, and the pressing needle 3 is inserted into the mounting portion 22. The mounting portion 22 is coaxially provided with a through hole 221 and a blind hole 222 along its own axis, the connecting end 31 penetrates the through hole 221 and cooperates with the locking piece 5, the blind hole 222 is used for accommodating the elastic piece 23, and the two ends of the elastic piece 23 are respectively abutted against the step surfaces adjacent to the abutting end 32. And cooperate with the locking piece 5 to realize the fixation of the pressing needle 3 on the base plate 2. The elastic piece 23 can adopt any one of a compression spring or a flexible sleeve.
[0027] In addition, as shown in Figure 5 , the tool frame 21 is provided with a hollow part 24, the hollow part 24 is formed on the circumferential side of the pressing needle 3, and is used for providing a welding path for a welding light beam and a channel for the smoke generated during welding. The two sides of the tool frame 21 are also provided with a connecting plate 25 made of magnetic material, the tool frame 21 is magnetically connected with the iron base through the connecting plate 25, and provides a pressing force for the welding strip 11. And the end of the connecting plate 25 close to the welding strip 11 is provided with a flexible pad 26.
[0028] In the application scenario of the present application, as Figure 2As shown, the welding strip 11 is laid below this application by a traction device. Because the traction end of the traction device has a certain height, the traction end of the welding strip 11 will be tilted upwards. Furthermore, before the clamping fixture compacts the welding strip 11 (i.e., before the entire row of pressure pins 3 is fully in contact with the welding strip 11), the traction device will maintain its clamping on the welding strip 11 to assist in positioning and prevent the welding strip 11 from shifting. This results in the traction end of the welding strip 11 remaining tilted upwards during the clamping process. If all the pressure pins 3 in the pressure pin row are at the same height, the traction end of the welding strip 11 will be subjected to a clamping force higher than that at the center of the welding strip 11 during the clamping process, causing the welding strip 11 to deform.
[0029] To solve this problem, such as Figure 3 As shown, this application provides a heightening member 4 on one side of the connecting end 31 of the pressure needle 3 formed at one end of the pressure needle row. In this embodiment, the heightening member 4 is a pad ring 4a, which is sleeved on the periphery of the pressure needle 3, and the top end of the pad ring 4a abuts against the bottom end of the locking ring.
[0030] This configuration raises the height of the pressure needle 3 at one end of the pressure needle row to accommodate the welding strip 11 near the traction end. Consequently, when the pressure needle row contacts the welding strip 11, the pressure needle 3 in the middle and the pressure needle 3 at one end of the pressure needle row can simultaneously contact the corresponding middle and traction ends of the welding strip 11. Furthermore, the pressure of the pressure needle 3 near the traction end of the welding strip 11 is lower than the pressure of the other pressure needles 3, preventing deformation of the welding strip 11 at the traction point.
[0031] In other embodiments of this application, such as Figure 6 As shown, the lifting member 4 is configured as a lifting platform 4b integrally formed with the substrate 2 and extending toward the connection end 31. By setting the lifting platform 4b, the purpose of lifting the pressure pin 3 is also achieved.
[0032] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.
Claims
1. A clamping fixture for positioning during welding of a welding strip (11) and a battery cell (12), characterized in that, It includes a substrate (2) and a row of pressure pins, wherein the row of pressure pins includes a plurality of pressure pins (3) arranged in a straight line, any pressure pin (3) penetrates the substrate (2) and has an axis perpendicular to the plane in which the substrate (2) is located; The pressure needle (3) has a connecting end (31) and an abutting end (32). The connecting end (31) is fixed with a locking member (5). An elastic member (23) is sleeved around the pressure needle (3), so that the locking member (5) directly or indirectly abuts against the substrate (2). A heightening member (4) is provided on one side of the connecting end (31) of the pressure needle (3) formed at least one end of the pressure needle row. The heightening member (4) is disposed between the locking member (5) and the base plate (2) for raising the pressure needle (3).
2. The clamping fixture according to claim 1, characterized in that, The heightening component (4) is configured as a gasket (4a), which is sleeved around the pressure needle (3).
3. The clamping fixture according to claim 1, characterized in that, The heightening member (4) is configured as a heightening platform (4b) integrally formed with the substrate (2) and extending toward the connection end (31).
4. A clamping fixture according to claim 2 or 3, characterized in that, The substrate (2) includes a tooling frame (21), on which an integrally formed mounting part (22) with a vertical axis is formed, and the pressure pin (3) is inserted into the mounting part (22).
5. A clamping fixture according to claim 4, characterized in that, The mounting part (22) is coaxially provided with a through hole (221) and a blind hole (222) along its own axis. The connecting end (31) passes through the through hole (221) and cooperates with the locking member (5). The blind hole (222) is used to accommodate the elastic member (23). The two ends of the elastic member (23) abut against the blind hole (222) and the stepped surface adjacent to the abutting end (32), respectively.
6. A clamping fixture according to claim 5, characterized in that, The elastic element (23) is either a compression spring or a flexible sleeve.
7. A clamping fixture according to claim 5, characterized in that, The tooling frame (21) has a hollowed-out portion (24) formed on the periphery of the pressure needle (3).
8. A clamping fixture according to claim 5, characterized in that, The tooling frame (21) is provided with connecting plates (25) made of magnetic material on both sides, and a flexible pad (26) is provided at the end of the connecting plate (25) near the welding strip (11).