Bending tool, welding device and method for bending a solder strip

Abstract

The application relates to a bending tool, a welding device and a welding strip bending method. The bending tool comprises a tool frame, a fixing mechanism and a bending mechanism; the fixing mechanism is connected with the tool frame, the bending mechanism is connected with the tool frame, and the bending mechanism can move along a first direction relative to the tool frame to bend a part of the welding strip; the first direction is the length direction or the width direction of the bending tool. In the application, the welding strip is first fixed by the fixing mechanism, and then the welding strip is bent by the bending mechanism, thereby reducing the risk of deviating from the preset position during the welding strip bending process, improving the accuracy of the installation position of the welding strip on the battery piece, reducing the risk of the bending form of the welding strip deviating greatly from the preset form due to movement during the welding strip bending process, improving the accuracy and consistency of the bending form of the welding strip, improving the bending yield of the welding strip, and thereby improving the working performance of the bending tool.

Description

Technical Field

[0001] This application relates to the field of battery cell welding technology, and in particular to a bending fixture, welding device and welding strip bending method. Background Technology

[0002] A battery comprises multiple solar cells and solder strips that electrically connect adjacent solar cells to improve battery performance. In the prior art, the solder strips are first bent, then the bent solder strips are placed onto the solar cells by traction, and finally the solder strips and solar cells are fixed.

[0003] During the placement and fixing of the welding strip, this method carries the risk of deformation at the bending point of the welding strip, which affects the final bending shape of the welding strip and the accuracy of the installation position of the welding strip on the battery cell. Summary of the Invention

[0004] This application provides a bending fixture, a welding device, and a method for bending welding strips, which can improve the stability of the bending shape of the welding strip and the accuracy of the installation position of the welding strip on the battery cell.

[0005] The first aspect of this application provides a bending fixture, comprising:

[0006] Tool rack;

[0007] A fixing mechanism, which connects to the tooling frame;

[0008] A bending mechanism is connected to a tooling frame and is capable of moving relative to the tooling frame in a first direction to bend a portion of the welding strip.

[0009] The first direction is the length or width direction of the bending fixture.

[0010] In some embodiments, the bending mechanism includes a bending beam and a bending member. The two ends of the bending beam are respectively connected to the tooling frame. One end of the bending member is connected to the bending beam, and the other end extends along a second direction and is used to abut against the welding strip. The second direction is the height direction of the bending tooling.

[0011] The bent beam can move along the first direction to drive the bent component to move.

[0012] In some embodiments, the tooling frame includes a first frame, a second frame, and a third frame, with the first frame and the second frame disposed opposite to each other on both sides of the third frame along a first direction;

[0013] The bent beam includes a first end and a second end disposed opposite to each other along a first direction, the first end being movably connected to a first frame and the second end being movably connected to a second frame;

[0014] Along the first direction, on the side of the first frame away from the second frame, a portion of the first end is located outside the first frame.

[0015] In some embodiments, the second frame is provided with a first mounting groove, and a portion of the second end is located in the first mounting groove and abuts against the side wall of the first mounting groove;

[0016] The bending mechanism includes a first elastic element, one end of which abuts against a first end, and the other end of which abuts against the side wall of the first mounting groove.

[0017] In some embodiments, the bending member includes a bending portion and a connecting portion, one end of the bending portion being connected to the bending beam, and the other end extending along a second direction and used to abut against the welding strip;

[0018] The connecting part protrudes from the bent part in a direction perpendicular to the second direction. The connecting part is rotatably connected to the tooling frame. When the bent beam moves in the first direction, the bent part can swing around the rotation axis.

[0019] In some embodiments, the fixing mechanism includes a fixing member, one end of which is connected to the tooling frame, and the other end of which extends along a second direction and is used to abut against a non-welding area on the welding strip to press and fix the welding strip.

[0020] The fastener is rotatably connected to the tooling frame, and the fastener is fixedly connected to the connecting part or integrally formed, with the rotation axis being the axis of the fastener.

[0021] In some embodiments, the fastener includes a fixing part and a limiting part, and the fixing part is connected to the connecting part;

[0022] The fixing part extends along the second direction. One end of the fixing part is used to abut against the welding strip, and the other end of the fixing part is connected to the limiting part. The limiting part abuts against the tooling frame to restrict the movement of the fixing part along the second direction.

[0023] In some embodiments, the fixing mechanism further includes a second elastic member, which is sleeved on the fixing portion, with one end of the second elastic member abutting against the tooling frame and the other end of the second elastic member abutting against the connecting portion.

[0024] In some embodiments, the number of bending mechanisms is one;

[0025] Alternatively, there may be multiple bending mechanisms, distributed at intervals along a third direction;

[0026] When the first direction is the length direction of the bending fixture, the third direction is the width direction of the bending fixture; when the first direction is the width direction of the bending fixture, the third direction is the length direction of the bending fixture.

[0027] During the bending process of the bending mechanism, the adjacent bending mechanisms move in opposite directions.

[0028] A second aspect of this application provides a welding apparatus, comprising:

[0029] The receiving mechanism is used to receive welding strips and battery cells;

[0030] A clamping mechanism is connected to a receiving mechanism and is capable of moving relative to the receiving mechanism.

[0031] The bending fixture described in any of the above embodiments is mounted on a clamping mechanism, the clamping mechanism is used to drive the bending fixture to move relative to the receiving mechanism, and the clamping mechanism is used to drive the bending mechanism to move.

[0032] The welding mechanism, connected to the receiving mechanism, is used to weld and fix the welding strip and the battery cell.

[0033] A third aspect of this application provides a method for bending welding strips, comprising:

[0034] Place the solder ribbon into the preset position on the solar cell;

[0035] The bending mechanism that drives the bending fixture moves to the first station along the first direction, where the first direction is the length or width direction of the bending fixture.

[0036] Move the bending fixture as a whole to a position above the welding strip along the second direction, which is the height direction of the bending fixture.

[0037] The bending fixture is pressed down in the second direction, and the fixing mechanism of the bending fixture abuts against the welding strip, pressing down to fix the non-welding area on the welding strip;

[0038] Drive the bending mechanism to move along the first direction to the second station to bend a portion of the welding strip;

[0039] Welding to fix the welding strip to the battery cell.

[0040] In some embodiments, the bending fixture includes a fixture frame, the bending mechanism includes a bending beam connected to the fixture frame and a bending member rotatably connected to the bending beam for bending the welding strip, a portion of a first end of the bending beam is located outside the fixture frame along a first direction, a first elastic member is clamped between the second end of the bending beam and the fixture frame, and the bending member is rotatably connected to the fixture frame.

[0041] The steps for driving the bending mechanism of the bending fixture to move along the first direction to the first station include:

[0042] Pressing the first end drives the bent beam to move along the first direction and compresses the first elastic element;

[0043] The bending beam drives the bent component to swing around the rotation axis to the first station;

[0044] The steps for driving the bending mechanism to move along the first direction to the second station include:

[0045] The first elastic element drives the bent beam to move along the first direction;

[0046] The bending beam drives the bending component to swing around the rotation axis to the second station and bends the welding strip.

[0047] In this application, the welding strip and the battery cell are first fixed by a fixing mechanism, and then the welding strip is bent by a bending mechanism. This reduces the risk of the welding strip deviating from the preset position during the bending process, thereby improving the accuracy of the installation position of the welding strip on the battery cell. At the same time, it reduces the risk of the welding strip moving during the bending process and causing a large deviation between the bending shape and the preset shape, thereby improving the accuracy and consistency of the bending shape of the welding strip, thus improving the bending yield of the welding strip, and further improving the working performance of the bending fixture and welding device.

[0048] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the bending fixture provided in this application in one embodiment, wherein the bending mechanism is located at the first station;

[0050] Figure 2 for Figure 1 Enlarged view of section I;

[0051] Figure 3 for Figure 1 A schematic diagram of the bending fixture when the bending mechanism is in the second position.

[0052] Figure 4 for Figure 3 Enlarged view of Part II;

[0053] Figure 5 for Figure 3 A schematic diagram of the connection of some structural parts of the bending tooling;

[0054] Figure 6 for Figure 5 Exploded view of part of the structure;

[0055] Figure 7 for Figure 5 Schematic diagram of the connection structure between the fixing mechanism and the bending component;

[0056] Figure 8 for Figure 7 Schematic diagram of the structure of the bending component;

[0057] Figure 9 A flowchart of one embodiment of the welding strip bending method provided in this application.

[0058] Figure label:

[0059] 10-Welding strip;

[0060] 20-cell battery;

[0061] 1- Tool rack;

[0062] 11-First frame;

[0063] 12-Second frame;

[0064] 13-Third frame;

[0065] 131 - Mounting hole;

[0066] 2-Fixed mechanism;

[0067] 21-Factor;

[0068] 211-Fixing part;

[0069] 212-Limiting part;

[0070] 22-Second elastic element;

[0071] 3- Bending mechanism;

[0072] 31-Bent beam;

[0073] 311 - First end;

[0074] 312 - Second end;

[0075] 313 - Second mounting slot;

[0076] 32- Bending parts;

[0077] 321 - Bending section;

[0078] 321a - First bend;

[0079] 321b - Second bend;

[0080] 322 - Connecting part;

[0081] 322a - Channel;

[0082] 33 - First elastic element.

[0083] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0084] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0085] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0086] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0087] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0088] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0089] This application provides a bending fixture, such as... Figure 1 and Figure 2 As shown, the bending fixture includes a fixture frame 1, a fixing mechanism 2, and a bending mechanism 3; the fixing mechanism 2 is connected to the fixture frame 1 and is used to press down and fix the welding strip 10 along the second direction Z; the bending mechanism 3 is connected to the fixture frame 1 and can move relative to the fixture frame 1 along the first direction X to bend a portion of the welding strip 10.

[0090] The bending fixture also includes a third direction Y. Of the first direction X and the third direction Y, one is the length direction of the bending fixture and the other is the width direction of the bending fixture. The second direction Z is the height direction of the bending fixture. In this embodiment, the first direction X is the length direction of the bending fixture, the second direction Z is the height direction of the bending fixture, and the third direction Y is the width direction of the bending fixture, as an example for explanation.

[0091] After the solder ribbon 10 is placed onto the solar cell 20, the solder ribbon 10 extends along the third direction Y on the solar cell 20, such as Figure 2As shown, the fixing mechanism 2 presses down on the fixing ribbon 10 along the second direction Z to improve the accuracy of the installation position of the ribbon 10 on the battery cell 20. Afterwards, the bending mechanism 3 moves along the first direction X (this movement can be either translation or rotation), as shown... Figure 2 , Figure 3 and Figure 4 As shown, the welding ribbon 10 is driven to undergo local bending deformation along the first direction X, so that the welding ribbon 10 is distributed in a V-shape, U-shape, S-shape, wave shape or other shape on the surface of the battery cell 20. When the battery cell 20 is subjected to external force and undergoes local deformation, the bending deformation part of the welding ribbon 10 can deform under the drive of the battery cell 20, thereby reducing the risk of separation between the welding ribbon 10 and the battery cell 20, thereby improving the stability of the connection between the welding ribbon 10 and the battery cell 20, and improving the working stability of the welding ribbon 10 and the battery cell 20.

[0092] In this embodiment, the welding ribbon 10 and the battery cell 20 are first fixed by pressing down the fixing mechanism 2, and then the welding ribbon 10 is bent by the bending mechanism 3. This reduces the risk of the welding ribbon 10 deviating from the preset position during the bending process, thereby improving the accuracy of the installation position of the welding ribbon 10 on the battery cell 20. At the same time, it reduces the risk of the bending shape of the welding ribbon 10 deviating significantly from the preset shape due to movement during the bending process, thereby improving the accuracy and consistency of the bending shape of the welding ribbon 10, thus improving the bending yield of the welding ribbon 10, and further improving the working performance of the bending fixture.

[0093] Specifically, such as Figure 5 and Figure 6 As shown, the bending mechanism 3 includes a bending beam 31 and a bending member 32. The two ends of the bending beam 31 are connected to the tooling frame 1 respectively. One end of the bending member 32 is connected to the bending beam 31, and the other end extends along the second direction Z and abuts against the welding strip 10. The bending beam 31 can move along the first direction X to drive the bending member 32 to move.

[0094] In this embodiment, the bending member 32 is driven to move by the movement of the bending beam 31 along the first direction X, so as to achieve the bending of the welding strip 10, which simplifies the operator's operation, thereby shortening the working cycle of the bending fixture and improving the working efficiency of the bending fixture.

[0095] In this design, the number of bending components 32 on a bending beam 31 is one, or multiple bending components 32 are connected to a bending beam 31. The multiple bending components 32 are distributed at intervals along the first direction X. When a bending beam 31 moves along the first direction X, the bending mechanism 3 can simultaneously bend multiple welding strips 10 distributed along the first direction X on the battery cell 20, thereby further improving the working efficiency of the bending fixture.

[0096] In addition, the number of bending beams 31 is one, or multiple bending beams 31 are distributed at intervals along the third direction Y. When multiple bending beams 31 move simultaneously along the first direction X, the bending fixture can bend multiple positions of a welding strip 10, so that the welding strip 10 is distributed in a wave shape on the surface of the battery cell 20, thereby further improving the connection stability between the welding strip 10 and the battery cell 20, and at the same time, further shortening the working cycle of the bending fixture.

[0097] When there are multiple bending beams 31, along the third direction Y, the movement directions of two adjacent bending beams 31 are opposite. That is, when the bending mechanism 3 bends the welding strip 10, one of the two adjacent bending beams 31 moves to the left along the first direction X, and the other moves to the right along the first direction X. This reduces the risk of the welding strip 10 shifting as a whole under the push of the bending member 32, thereby improving the accuracy of the installation position of the welding strip 10 on the battery cell 20.

[0098] Specifically, such as Figure 5 and Figure 6 As shown, the tooling frame 1 includes a first frame 11, a second frame 12, and a third frame 13. Along the first direction X, the first frame 11 and the second frame 12 are arranged opposite to each other on both sides of the third frame 13. The bent beam 31 includes a first end 311 and a second end 312 arranged opposite to each other along the first direction X. The first end 311 is movably connected to the first frame 11, and the second end 312 is movably connected to the second frame 12. Along the first direction X, on the side of the first frame 11 away from the second frame 12, a portion of the first end 311 is located outside the first frame 11.

[0099] In this embodiment, the movement of the bending beam 31 can be achieved by pressing the first end 311 along the first direction X, which simplifies the operation of the bending mechanism 3 and thus helps to improve the working efficiency of the bending fixture.

[0100] Specifically, such as Figure 6 As shown, the second frame 12 is provided with a first mounting groove (not shown in the figure), and a part of the second end 312 is located in the first mounting groove and abuts against the side wall of the first mounting groove; the bending mechanism 3 includes a first elastic member 33, one end of the first elastic member 33 abuts against the second end 312, and the other end of the first elastic member 33 abuts against the side wall of the first mounting groove.

[0101] In this embodiment, when the first elastic element 33 is in its natural state, i.e., when the bending mechanism 3 is not subjected to external force, the first part of the first end 311 of the bending beam 31 is pushed out by the first elastic element 33, so that a part of the first end 311 is located outside the first frame 11. When the first end 311 is pressed along the first direction X, the bending beam 31 moves along the first direction X toward the second frame 12, so that the first elastic element 33 is compressed and generates a rebound force. After the bending mechanism 3 completes the bending of the welding strip 10, the force on the first end 311 is released, and the bending beam 31 moves along the first direction X away from the second frame 12 under the action of the rebound force of the first elastic element 33, so that a part of the first end 311 extends to the outside of the first frame 11, so as to facilitate the next operation of the bending mechanism 3. Therefore, by setting the first elastic element 33, the bending mechanism 3 can automatically reset, simplifying the structure of the bending mechanism 3 and simplifying the operation method of the bending mechanism 3, further improving the working efficiency of the bending fixture.

[0102] In this embodiment, a bent beam 31 can be connected to one or more first elastic elements 33 at the same time. The type and number of first elastic elements 33 are not specifically limited in this application.

[0103] In one embodiment, the bending beam 31 and the bending member 32 are fixedly connected or integrally formed. That is, when the bending beam 31 moves along the first direction X, the bending member 32 moves synchronously along the first direction X under the drive of the bending beam 31, so as to increase the connection stability between the bending beam 31 and the bending member 32.

[0104] In another embodiment, the bending beam 31 is rotatably connected to the bending component 32, and the bending component 32 is rotatably connected to the tooling frame 1. That is, when the bending beam 31 moves along the first direction X, the bending beam 31 can drive the bending component 32 to swing around the rotation axis, so as to reduce the space required for the movement of the bending component 32, thereby reducing the overall size of the bending mechanism 3 and reducing the processing cost.

[0105] In this embodiment, the bent beam 31 is rotatably connected to the bent component 32, and the bent component 32 is rotatably connected to the tooling frame 1.

[0106] Specifically, such as Figure 6 As shown, the bent beam 31 is provided with a second mounting groove 313. One end of the bent member 32 extends into the second mounting groove 313 and abuts against the side wall of the second mounting groove 313. When the bent beam 31 moves along the first direction X, the bent member 32 can swing under the drive of the second mounting groove 313 to bend the welding strip 10.

[0107] The second mounting slot 313 simplifies the connection between the bent beam 31 and the bent component 32, thereby simplifying the structure of the bent beam 31 and the bent component 32 and reducing the processing cost of the bent beam 31 and the bent component 32.

[0108] The second mounting groove 313 extends through the bent beam 31 along the second direction Z, and extends through one side of the bent beam 31 along the third direction Y, so as to facilitate the installation of the bent part 32 in the second mounting groove 313, and at the same time facilitate the processing of the second mounting groove 313 and reduce the processing cost of the second mounting groove 313.

[0109] Specifically, such as Figure 7 and Figure 8 As shown, the bending member 32 includes a bending portion 321 and a connecting portion 322. One end of the bending portion 321 is rotatably connected to the bending beam 31, and the other end extends along the second direction Z and is used to abut against the welding strip 10. The connecting portion 322 protrudes from the bending portion 321 in a direction perpendicular to the second direction Z. The connecting portion 322 is rotatably connected to the third frame 13. When the bending beam 31 moves along the first direction X, the bending member 32 can swing around the rotation axis.

[0110] The bent portion 321 and the connecting portion 322 are connected to form a T-shaped or Z-shaped structure to increase the structural flexibility of the bent component 32. In this embodiment, as... Figure 8 As shown, the bending portion 321 includes a first bending portion 321a and a second bending portion 321b. The first bending portion 321a and the second bending portion 321b are disposed opposite each other on both sides of the connecting portion 322. The end of the first bending portion 321a away from the connecting portion 322 extends along the second direction Z and connects to the bending beam 31. The end of the second bending portion 321b away from the connecting portion 322 extends along the second direction Z and is used to abut against the welding strip 10. That is, the first bending portion 321a, the connecting portion 322, and the second bending portion 321b are connected to form a Z-shaped structure. The first bending portion 321a, the connecting portion 322, and the second bending portion 321b are integrally formed or fixedly connected to increase the connection stability of the first bending portion 321a, the connecting portion 322, and the second bending portion 321b.

[0111] In one embodiment, the connecting part 322 is directly connected to the third frame 13 to reduce the number of parts of the bending mechanism 3, thereby reducing the processing cost of the bending mechanism 3.

[0112] In another embodiment, the third frame 13 is provided with a connector extending along the second direction Z. The connecting part 322 is fixedly connected to the connector, and the connector is rotatably connected to the third frame 13. In this case, the central axis of the connector is the rotation axis of the bending part 32. When the bending beam 31 moves along the first direction X, the bending beam 31 can drive the first bending part 321a to swing, thereby driving the connecting part 322 and the connector fixedly connected to the connecting part 322 to rotate around the rotation axis, thereby realizing the swing of the second bending part 321b. Providing a connector can simplify the structure of the third frame 13 and the connecting part 322, thereby reducing the processing cost of the third frame 13 and the connector.

[0113] Specifically, in one embodiment, the connector is an additional part provided on the third frame 13.

[0114] In another embodiment, such as Figure 2 , Figure 4 and Figure 7 As shown, the fixing mechanism 2 includes a fixing member 21. One end of the fixing member 21 is connected to the third frame 13, and the other end extends along the second direction Z, passes through the connecting part 322, and is used to abut against the non-welding area on the welding strip 10 to press and fix the welding strip 10. The fixing member 21 is rotatably connected to the tooling frame 1, that is, the fixing member 21 is the aforementioned connecting member, and the rotation axis of the bending member 32 is the axis of the fixing member 21.

[0115] In this embodiment, the fastener 21 is used as a connector, which improves the structural utilization of the fastener 21, thereby improving the structural compactness of the bending fixture and reducing the overall size of the bending fixture, so as to facilitate the processing, transportation and use of the bending fixture. In addition, it reduces the risk of increased costs due to additional connectors, thereby reducing the processing cost of the bending fixture.

[0116] The fastener 21 is fixedly connected to or integrally formed with the connecting part 322 to increase the stability of the connection between the fastener 21 and the connecting part 322. Specifically, when the fastener 21 and the connecting part 322 are separately provided and fixedly connected, such as... Figure 8 As shown, the connecting part 322 is provided with a channel 322a, which extends through the connecting part 322 along the second direction Z. The fastener 21 passes through the channel 322a and abuts against the side wall of the channel 322a. The fastener 21 can be press-fitted, bonded, welded, or threaded with the channel 322a. The specific fastening method of the fastener 21 and the channel 322a is not specifically limited in the embodiments of this application.

[0117] Specifically, such as Figure 7 As shown, the fixing part 21 includes a fixing part 211 and a limiting part 212. The fixing part 211 is connected to the connecting part 322 and extends along the second direction Z. One end of the fixing part 211 is used to abut against the welding strip 10, and the other end is connected to the limiting part 212. The limiting part 212 abuts against the third frame 13 to restrict the movement of the fixing part 21 along the second direction Z, thereby reducing the risk of the fixing part 21 and the bent part 32 falling off due to the fixing part 21 detaching from the third frame 13 during the bending fixture operation. This improves the connection stability between the fixing part 21, the bent part 32 and the fixture frame 1, and further improves the working stability of the fixing part 21 and the bent part 32.

[0118] In one embodiment, the third frame 13 is provided with a third mounting groove (not shown in the figure). The third mounting groove includes a first limiting wall and a second limiting wall arranged opposite to each other along the second direction Z. The limiting part 212 is installed in the third mounting groove. The two end faces of the limiting part 212 in the second direction Z abut against the first limiting wall and the second limiting wall respectively, so as to reduce the risk of the fastener 21 detaching from the third frame 13.

[0119] In another embodiment, such as Figure 5 and Figure 6 As shown, the third frame 13 is provided with a mounting hole 131, which penetrates the third frame 13 along the second direction Z. The fixing part 211 passes through the mounting hole 131, so that the limiting part 212 is located above the mounting hole 131 in the second direction Z and abuts against the third frame 13. That is, the limiting part 212 is used to restrict the downward movement of the fixing member 21 along the second direction Z. Figure 5 and Figure 7 As shown, the fixing mechanism 2 also includes a second elastic member 22, which is sleeved on the fixing part 211. One end of the second elastic member 22 abuts against the third frame 13, and the other end abuts against the connecting part 322. That is, the second elastic member 22 is located between the third frame 13 and the connecting part 322. When the fixing member 21 tends to move upward in the second direction Z under the action of external force, the second elastic member 22 is compressed. At the same time, the second elastic member 22 applies a force upward in the second direction Z to the third frame 13 and a force downward in the second direction Z to the connecting part 322 to counteract the movement tendency of the fixing member 21 and limit the movement of the fixing member 21 upward in the second direction Z.

[0120] In this embodiment, the movement of the fixing member 21 as a whole in the second direction Z is restricted by the limiting part 212 and the second elastic member 22, so that the fixing member 21 is fixed on the third frame 13, which simplifies the structure of the third frame 13 and the fixing member 21 and reduces the processing cost of the third frame 13 and the fixing member 21. At the same time, the fixing member 21 and the welding strip 10 are elastically contacted, which reduces the risk of the fixing member 21 damaging the welding strip 10 and the battery cell 20.

[0121] Furthermore, the fixing member 21 cannot move along the second direction Z, and the fixing member 21 is fixedly connected to or integrally formed with the bending member 32, thereby restricting the movement of the bending member 32 in the second direction Z. That is, the first bending part 321a of the bending member 32 only needs to extend into the second mounting groove 313 of the bending beam 31, which simplifies the connection structure between the first bending part 321a and the bending beam 31, thereby further reducing the processing cost of the bending mechanism 3.

[0122] Regarding the aforementioned bending fixture, this application provides a method for bending the welding strip 10, such as... Figure 9 As shown, the bending method of the welding strip 10 includes:

[0123] Place the welding ribbon 10 into the preset position on the battery cell 20;

[0124] The bending mechanism 3 of the driving bending fixture moves along the first direction X to the first station;

[0125] Move the bending fixture as a whole to above the welding strip 10 along the second direction Z;

[0126] The bending fixture is pressed down along the second direction Z. The fixing mechanism 2 of the bending fixture abuts against the welding strip 10, and the non-welding area on the welding strip 10 is fixed by pressing down.

[0127] Drive the bending mechanism 3 to move along the first direction X to the second station to bend a portion of the welding strip 10;

[0128] Weld the welding strip 10 to the battery cell 20.

[0129] In this embodiment, the welding ribbon 10 and the battery cell 20 are first fixed by pressing down the fixing mechanism 2, and then the welding ribbon 10 is bent by the bending mechanism 3. This reduces the risk of the welding ribbon 10 deviating from the preset position during the bending process, thereby improving the accuracy of the installation position of the welding ribbon 10 on the battery cell 20. At the same time, it reduces the risk of the bending shape of the welding ribbon 10 deviating significantly from the preset shape due to movement during the bending process, thereby improving the accuracy and consistency of the bending shape of the welding ribbon 10, thus improving the bending yield of the welding ribbon 10, and further improving the working performance of the bending fixture.

[0130] Specifically, such as Figure 9 As shown, the steps of driving the bending mechanism 3 of the bending fixture to move to the first station along the first direction X include:

[0131] Pressing the first end 311 drives the bending beam 31 to move along the first direction X and compresses the first elastic element 33;

[0132] like Figure 1 and Figure 2 As shown, the bending beam 31 drives the bending component 32 to swing around the central axis of the fixing component 21 to the first station.

[0133] The steps for driving the bending mechanism 3 to move along the first direction X to the second station include:

[0134] The force on the first end 311 is removed, and the first elastic element 33 drives the bending beam 31 to move along the first direction X.

[0135] like Figure 3 and Figure 4 As shown, the bending beam 31 drives the bending component 32 to swing around the central axis of the fixing component 21 to the second station and bends the welding strip 10.

[0136] In this embodiment, the bent part 32 is first swung to the first station, such as... Figure 2 As shown, this allows the operator to easily observe the relative position of the fixing member 21 and the welding strip 10, thereby improving the accuracy and reliability of the fixing member 21 pressing down on the welding strip 10.

[0137] The bending mechanism 3 can be driven to move, and the bending fixture can be moved as a whole, either manually or by machine, i.e., by a robot, robotic arm, welding device, or other similar device, to automate the bending and welding process of the welding strip 10. In this embodiment, the bending fixture is mounted on a welding device (not shown in the figure), meaning the movement of the bending mechanism 3 is controlled by the welding device.

[0138] Specifically, the welding device includes a receiving mechanism, a clamping mechanism, a bending fixture as described in any of the above embodiments, and a welding mechanism. The receiving mechanism is used to receive the welding strip 10 and the battery cell 20. The clamping mechanism is connected to the receiving mechanism and can move relative to the receiving mechanism. The bending fixture is installed on the clamping mechanism. The clamping mechanism is used to drive the bending fixture as a whole to move relative to the receiving mechanism, thereby pressing down to fix the welding strip 10 and the battery cell 20. At the same time, the clamping mechanism is used to drive the bending mechanism 3 to move to bend a portion of the welding strip 10. The welding structure is used to weld and fix the welding strip 10 and the battery cell 20.

[0139] Specifically, when the welding device is working, the welding strip 10 and the battery cell 20 are first placed on the receiving mechanism. The clamping mechanism clamps and fixes the bending fixture and moves the bending fixture above the receiving mechanism in the second direction Z. The clamping mechanism drives the bending fixture to move along the second direction Z, so that the fixing mechanism 2 of the bending fixture abuts against the welding strip 10, thereby pressing down and fixing the welding strip 10 and the battery cell 20, reducing the risk of the welding strip 10 shifting. The clamping mechanism drives the bending mechanism 3 to move to bend a part of the welding strip 10. After that, the welding mechanism welds and fixes the welding strip 10 and the battery cell 20.

[0140] In this embodiment, the movement and operation of the bending fixture are controlled by the clamping mechanism of the welding device, which simplifies the operator's operation and facilitates the automation of the bending fixture, thereby improving the working performance of the bending fixture and the welding device, and saving labor costs during operation. Before the welding mechanism fixes the welding strip 10 and the battery cell 20, the bending fixture first presses down to fix the welding strip 10 and the battery cell 20, and then bends the welding strip 10. This improves the accuracy of the installation position of the welding strip 10 on the battery cell 20, while reducing the risk of changes in the bending shape of the welding strip 10 during the welding process. This improves the accuracy and consistency of the bending shape of the welding strip 10, thereby improving the working stability and processing yield of the welding device.

[0141] In summary, the bending method of the welding strip 10 provided in this application is as follows:

[0142] Place the battery cell 20 onto the receiving mechanism of the welding device;

[0143] Place the solder ribbon 10 on the preset position of the battery cell 20, so that the solder ribbon 10 extends along the third direction Y;

[0144] The clamping mechanism of the welding device grabs the bending fixture and clamps the first frame 11 and the second frame 12 from both sides along the first direction X. The first end 311 of the bending beam 31 is retracted into the first frame 11 under the drive of the clamping mechanism. That is, the bending beam 31 moves along the first direction X towards the second frame 12 and compresses the first elastic member 33 under the drive of the clamping mechanism.

[0145] like Figure 2 As shown, the bent component 32 swings around the central axis of the fixed component 21 and is maintained in the first position under the drive of the bent beam 31.

[0146] The clamping mechanism presses down and bends the fixture along the second direction Z, and the fixing part 21 abuts against the welding strip 10, pressing down to fix the welding strip 10.

[0147] The clamping mechanism cancels the force on the first end 311, and the bending beam 31 moves away from the second frame 12 along the first direction X under the action of the rebound force of the first elastic element 33.

[0148] like Figure 4 As shown, the bent component 32 swings around the central axis of the fixed component 21 and is maintained in the second position under the drive of the bent beam 31.

[0149] The welding mechanism of the welding device welds and fixes the welding strip 10 and the battery cell 20.

[0150] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A bending tool characterized by, The bending tool comprises: a tool frame (1); a fixing mechanism (2) connected with the tool frame (1); a bending mechanism (3) comprising a bending beam (31) and a bending piece (32), two ends of the bending beam (31) are respectively connected with the tool frame (1), the bending piece (32) comprises a bending part (321) and a connecting part (322), one end of the bending part (321) is connected with the bending beam (31), the other end extends along a second direction (Z) and is used for abutting against a solder strip (10), the bending beam (31) can move along a first direction (X) relative to the tool frame (1) to drive the bending piece (32) to move, so as to bend a part of the solder strip (10), the first direction (X) is a length direction or a width direction of the bending tool, and the second direction (Z) is a height direction of the bending tool; the connecting part (322) protrudes from the bending part (321) along a direction perpendicular to the second direction (Z), the connecting part (322) is rotationally connected with the tool frame (1), and when the bending beam (31) moves along the first direction (X), the bending piece (32) can swing around a rotation axis; the fixing mechanism (2) comprises a fixing piece (21), the fixing piece (21) comprises a fixing part (211) and a limiting part (212), the fixing part (211) is connected with the connecting part (322), the fixing part (211) extends along the second direction (Z), one end of the fixing part (211) is used for abutting against the solder strip (10), the other end of the fixing part (211) is connected with the limiting part (212), and the limiting part (212) abuts against the tool frame (1) to limit the movement of the fixing piece (21) along the second direction (Z); the fixing piece (21) is rotationally connected with the tool frame (1), the fixing piece (21) is fixedly connected with the connecting part (322) or is integrally formed, and the rotation axis is an axis of the fixing piece (21); the fixing mechanism (2) further comprises a second elastic piece (22), the second elastic piece (22) is sleeved on the fixing part (211), one end of the second elastic piece (22) abuts against the tool frame (1), and the other end of the second elastic piece (22) abuts against the connecting part (322).

2. The bending tool of claim 1, wherein the tool frame (1) comprises a first frame body (11), a second frame body (12) and a third frame body (13), and the first frame body (11) and the second frame body (12) are oppositely arranged on two sides of the third frame body (13) along the first direction (X); the bending beam (31) comprises a first end (311) and a second end (312) oppositely arranged along the first direction (X), the first end (311) is movably connected with the first frame body (11), and the second end (312) is movably connected with the second frame body (12); Along the first direction (X), a part of the first end (311) is located outside the first frame body (11) away from the second frame body (12).

3. The bending tool of claim 2, wherein The second frame body (12) is provided with a first mounting groove, and a part of the second end (312) is located in the first mounting groove and abuts against the side wall of the first mounting groove. The bending mechanism (3) comprises a first elastic member (33), one end of the first elastic member (33) abuts against the first end (311), and the other end of the first elastic member (33) abuts against the side wall of the first mounting groove.

4. The bending tool according to any one of claims 1 to 3, characterized in that The number of the bending mechanism (3) is one. Alternatively, the number of the bending mechanism (3) is multiple, and multiple bending mechanisms (3) are distributed at intervals along a third direction (Y). When the first direction (X) is the length direction of the bending tool, the third direction (Y) is the width direction of the bending tool, and when the first direction (X) is the width direction of the bending tool, the third direction (Y) is the length direction of the bending tool. During the bending process of the bending mechanism (3), the moving directions of adjacent bending mechanisms (3) are opposite.

5. A welding device characterized by, The welding device comprises: a receiving mechanism for receiving a welding strip (10) and a battery piece (20); a clamping mechanism connected with the receiving mechanism, the clamping mechanism being capable of moving relative to the receiving mechanism; the bending tool of any one of claims 1 to 4 is installed on the clamping mechanism, the clamping mechanism is used to drive the bending tool to move relative to the receiving mechanism, and the clamping mechanism is used to drive the bending mechanism (3) to move; a welding mechanism connected with the receiving mechanism and used for welding and fixing the welding strip (10) and the battery piece (20).

6. A method of bending a solder strip (10) using the bending tool (1) according to any one of claims 1 to 4, characterized in that The welding strip bending method comprises: placing the welding strip (10) on a preset position of the battery piece (20); driving the bending mechanism (3) of the bending tool to move to a first station along a first direction (X), the first direction (X) being the length direction or the width direction of the bending tool; moving the bending tool as a whole above the welding strip (10) along a second direction (Z), the second direction (Z) being the height direction of the bending tool; pressing down the bending tool along the second direction (Z), the fixing mechanism (2) of the bending tool abutting against the welding strip (10), and the non-welding point area on the welding strip (10) being fixed by pressing down; driving the bending mechanism (3) to move to a second station along the first direction (X) to bend a part of the welding strip (10); welding and fixing the welding strip (10) and the battery piece (20).

7. The method of claim 6, wherein, The bending tool includes a tool frame (1), the bending mechanism (3) includes a bending beam (31) connected with the tool frame (1) and a bending piece (32) for bending the solder strip (10) and rotatingly connected with the bending beam (31), a part of a first end (311) of the bending beam (31) is located outside the tool frame (1) along the first direction (X), a first elastic member (33) is clamped between a second end (312) of the bending beam (31) and the tool frame (1), and the bending piece (32) is rotatingly connected with the tool frame (1); The step of driving the bending mechanism (3) of the bending tool to move to the first station along the first direction (X) includes: pressing the first end (311) to drive the bending beam (31) to move along the first direction (X) and compress the first elastic member (33); the bending beam (31) drives the bending piece (32) to swing around the rotation axis to the first station; The step of driving the bending mechanism (3) to move to the second station along the first direction (X) includes: the first elastic member (33) drives the bending beam (31) to move along the first direction (X); the bending beam (31) drives the bending piece (32) to swing around the rotation axis to the second station and bends the solder strip (10).

Images