Ultrasonic welding seat, ultrasonic welding equipment and supporting plate thereof

Abstract

The present application discloses an ultrasonic welding seat, ultrasonic welding equipment and its support plate, which relate to the field of battery manufacturing technology. The ultrasonic welding seat is used to be arranged opposite to the ultrasonic welding head of the ultrasonic welding equipment. A boss is provided at one end of the ultrasonic welding seat, and the boss is used to embed into the concave cavity of the plate to be welded, and the side wall surface of the boss is used to abut the side wall surface of the concave cavity. The boss on the end of the ultrasonic welding seat can be embedded in the concave cavity of the plate to be welded, and the side wall surface of the boss can abut the side wall surface of the concave cavity, thereby reducing the risk of the plate to be welded moving relative to the ultrasonic welding seat, reducing the energy consumed between the ultrasonic welding seat and the plate to be welded, so that the welding energy is more concentrated between the plate to be welded and the structure to be welded by the pole ear, and reducing the risk of a cold weld between the plate to be welded and the structure to be welded. In addition, since the risk of the plate to be welded moving relative to the ultrasonic welding seat is reduced, the risk of the boss being worn by the plate to be welded is reduced, and the overall service life of the ultrasonic welding seat is longer.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to an ultrasonic welding seat, ultrasonic welding equipment and a support plate thereof. Background Art

[0002] In the production process of lithium batteries, sodium batteries and other types of batteries, ultrasonic welding equipment such as ultrasonic welding machines are usually used to weld the tabs of bare cells to adapters or pins, and then one or more bare cells are assembled with a top cover structure, a battery casing, etc. to form a battery cell.

[0003] When the ultrasonic welding equipment adopts the fixed energy welding mode, it can be understood that the total energy output of the ultrasonic welding equipment for a single welding is fixed. Sometimes, the welding between the bare battery cell's tab waiting to be welded structure and the adapter plate waiting to be welded will have the problem of cold welding. Utility Model Content

[0004] The main purpose of this application is to propose an ultrasonic welding seat, an ultrasonic welding device and a support plate thereof, aiming to reduce the risk of false welding.

[0005] To achieve the above-mentioned purpose, the ultrasonic welding seat proposed in the present application is used to be arranged opposite to the ultrasonic welding head of the ultrasonic welding equipment, and a boss is provided at one end of the ultrasonic welding seat, and the boss is used to be embedded in the concave cavity of the plate to be welded, and the side wall surface of the boss is used to abut the side wall surface of the concave cavity.

[0006] When the ultrasonic welding seat in the technical solution of the present application is in use, the boss on the end of the ultrasonic welding seat can be embedded in the concave cavity of the plate to be welded, and the side wall surface of the boss can abut the side wall surface of the concave cavity, thereby reducing the risk of the plate to be welded moving relative to the ultrasonic welding seat, reducing the energy consumed between the ultrasonic welding seat and the plate to be welded, so that the welding energy is more concentrated between the plate to be welded and the structure of the pole ear waiting to be welded, and reducing the risk of a cold weld between the plate to be welded and the structure to be welded. In addition, since the risk of the plate to be welded moving relative to the ultrasonic welding seat is reduced, the risk of the boss on the end face of the ultrasonic welding seat being worn by the plate to be welded is reduced, and the overall service life of the ultrasonic welding seat is longer, thereby reducing the replacement frequency of the ultrasonic welding seat and reducing the overall use cost of the ultrasonic welding seat; on the other hand, the risk of the boss being worn by the plate to be welded is reduced, and the dust formed between the plate to be welded and the ultrasonic welding seat is reduced, which is beneficial to improving the overall quality of the corresponding battery cell.

[0007] Optionally, the side wall surface of the boss includes a first inclined wall segment, and the side wall surface of the cavity includes a second inclined wall segment; the first inclined wall segment is used to abut the second inclined wall segment so that the ultrasonic welding seat and the plate to be welded can move relative to each other along the surface of the plate to be welded.

[0008] At this time, the ultrasonic welding seat can abut the second inclined wall section through the first inclined wall section, so that the ultrasonic welding seat and the plate to be welded can move relative to each other along the surface of the plate to be welded, which is conducive to compatibility with the positioning deviation between the ultrasonic welding seat and the plate to be welded, and improves the alignment degree between the ultrasonic welding seat and the plate to be welded.

[0009] Optionally, the first inclined wall segment is arranged to be an arc, and the arc center axis of the first inclined wall segment intersects with the top surface of the boss; the second inclined wall segment is arranged to be an arc, and the arc center axis of the second inclined wall segment intersects with the surface of the plate to be welded.

[0010] At this time, the first inclined wall segment and the second inclined wall segment are respectively set to be arc-shaped, which is conducive to guiding in more directions of the arc surface and is conducive to further improving the alignment degree between the ultrasonic welding seat and the plate to be welded.

[0011] Optionally, a preset angle is formed between the end surface of the ultrasonic welding seat provided with the boss and the first inclined wall segment, and the preset angle is greater than 90 degrees and less than or equal to 120 degrees.

[0012] At this time, the preset angle is greater than 90 degrees and less than or equal to 120 degrees, so that the side wall surface of the boss is relatively steep; when the root size and height of the boss are constant, the area of ​​the top of the boss is increased, the risk of the top of the boss being worn by the plate to be welded is reduced, the risk of cold welding caused by relative movement between the plate to be welded and the ultrasonic welding seat is reduced, and the risk of dust formation due to wear is reduced.

[0013] Optionally, a dimension of a root of the boss in a preset direction is greater than a dimension of a mouth of the cavity in the preset direction, and the preset direction is perpendicular to a height direction of the boss.

[0014] At this time, the root of the boss can be embedded in the mouth of the cavity by means of elastic-plastic deformation, so that the root of the boss and the mouth of the cavity form an interference fit, which improves the connection stability between the ultrasonic welding seat and the plate to be welded, and further reduces the risk of a cold weld caused by the plate to be welded moving relative to the ultrasonic welding seat.

[0015] Optionally, the top end of the boss is configured as a flat surface.

[0016] At this time, the top of the boss is set as a flat surface, and the area of ​​the top of the boss is relatively large, which reduces the risk of the top of the boss being worn by the plate to be welded, reduces the risk of relative movement between the plate to be welded and the ultrasonic welding seat causing a cold weld, and reduces the risk of dust formation due to wear.

[0017] Optionally, the ratio of the area of ​​the top surface of the boss to the cross-sectional area of ​​the root of the boss is greater than or equal to 0.2; and / or the boss is configured as one of a cylindrical table, a polygonal prism table, a conical table, and a polygonal truncated pyramid.

[0018] At this time, the ratio of the area of ​​the top surface of the boss to the cross-sectional area of ​​the root of the boss is greater than or equal to 0.2, and the area of ​​the top of the boss is relatively large, which further reduces the risk of the top of the boss being worn by the plate to be welded, further reduces the risk of the plate to be welded and the ultrasonic welding seat moving relative to each other and causing a poor weld, and reduces the risk of dust formation due to wear. In addition, the boss is set as a cylindrical table or a multi-prism table, and the area of ​​the top of the boss is relatively large, which improves the connection stability between the ultrasonic welding seat and the plate to be welded, reduces the risk of the top of the boss being worn by the plate to be welded, reduces the risk of the plate to be welded and the ultrasonic welding seat moving relative to each other and causing a poor weld, and reduces the risk of dust formation due to wear; the boss is set as a conical table or a multi-prism table, which can form the above-mentioned first inclined wall section through the side wall surface, respectively, so as to be compatible with the positioning deviation between the ultrasonic welding seat and the plate to be welded, and respectively improve the alignment degree between the ultrasonic welding seat and the plate to be welded.

[0019] Optionally, the side wall surface of the boss includes a first flat wall segment, and the side wall surface of the cavity includes a second flat wall segment, the first flat wall segment is used to abut the second flat wall segment, and the first flat wall segment is used to intersect with the vibration direction of the ultrasonic horn.

[0020] At this time, the ultrasonic welding seat can abut the second flat wall segment through the first flat wall segment, and make the first flat wall segment intersect with the vibration direction of the ultrasonic welding head, thereby reducing the local pressure of the vibrating ultrasonic welding head on the boss, reducing the risk of the top of the boss being worn by the plate to be welded, reducing the risk of relative movement between the plate to be welded and the ultrasonic welding seat causing a cold weld, and reducing the risk of dust formation due to wear.

[0021] The present application also proposes an ultrasonic welding device, which includes an ultrasonic generator, a transducer, an amplitude variation device, an ultrasonic welding head and the above-mentioned ultrasonic welding seat.

[0022] When the ultrasonic welding equipment in the technical solution of the present application is in use, the boss on the end of the ultrasonic welding seat can be embedded in the concave cavity of the plate to be welded, and the side wall surface of the boss can abut the side wall surface of the concave cavity, thereby reducing the risk of the plate to be welded moving relative to the ultrasonic welding seat, reducing the energy consumed between the ultrasonic welding seat and the plate to be welded, so that the welding energy is more concentrated between the plate to be welded and the structure of the pole ear waiting to be welded, and reducing the risk of a cold weld between the plate to be welded and the structure to be welded. In addition, since the risk of the plate to be welded moving relative to the ultrasonic welding seat is reduced, the risk of the boss on the end face of the ultrasonic welding seat being worn by the plate to be welded is reduced, and the overall service life of the ultrasonic welding seat is longer, thereby reducing the replacement frequency of the ultrasonic welding seat and reducing the overall use cost of the ultrasonic welding seat; on the other hand, the risk of the boss being worn by the plate to be welded is reduced, reducing the dust formed between the plate to be welded and the ultrasonic welding seat, which is beneficial to improving the overall quality of the corresponding battery cell.

[0023] Optionally, the ultrasonic welding head is provided with a welding tooth at one end facing the ultrasonic welding seat, and the cross-sectional area of ​​the root of the boss is larger than the cross-sectional area of ​​the root of the welding tooth.

[0024] At this time, the cross-sectional area of ​​the root of the boss is larger than the cross-sectional area of ​​the root of the welding tooth of the ultrasonic welding head, and the area of ​​the top of the boss is relatively large, which further reduces the risk of the top of the boss being worn by the plate to be welded, further reduces the risk of relative movement between the plate to be welded and the ultrasonic welding seat causing a cold weld, and reduces the risk of dust formation due to wear.

[0025] Optionally, the ultrasonic welding equipment also includes a support plate, a surface of the support plate is provided with a groove, and the bottom wall of the groove is provided with a through hole; the plate to be welded is used to be placed in the groove, and the side of the plate to be welded provided with the concave cavity is used to face the through hole.

[0026] At this time, the plate to be welded can be positioned by the boss of the ultrasonic welding seat through the cavity. The force acting on the support plate due to the welding vibration is reduced, which is beneficial for the support plate to have sufficient structural strength when the groove is provided, and is beneficial for improving the positioning efficiency of the plate to be welded through the groove of the support plate; in addition, after the plate to be welded is placed in the groove, the surface flatness between the plate to be welded and the support plate is higher, which is beneficial to reduce the risk of accidental bending of the pole ear waiting for welding structure.

[0027] The present application also proposes a support plate, a groove is provided on the surface of the support plate, and a through hole is provided on the bottom wall of the groove; the plate to be welded is used to be placed in the groove, and the side of the plate to be welded provided with the concave cavity is used to face the through hole, and the through hole is used for the above-mentioned boss to be embedded in the concave cavity.

[0028] When in use, the support plate in the technical solution of the present application can place the plate to be welded through the groove, and can embed the boss on the end of the ultrasonic welding seat into the concave cavity of the plate to be welded through the through hole, and make the side wall surface of the boss abut the side wall surface of the concave cavity, thereby reducing the risk of the plate to be welded moving relative to the ultrasonic welding seat, reducing the energy consumed between the ultrasonic welding seat and the plate to be welded, making the welding energy more concentrated between the plate to be welded and the ear waiting to be welded structure, and reducing the risk of cold welding between the plate to be welded and the structure to be welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0030] Figure 1 It is a structural schematic diagram of an implementation method of an ultrasonic welding device in the related art;

[0031] Figure 2 It is a structural schematic diagram of an implementation method of an ultrasonic welding seat in the related art;

[0032] Figure 3 A schematic structural diagram of an embodiment of an ultrasonic welding device provided in the present application;

[0033] Figure 4 A schematic structural diagram of an embodiment of an ultrasonic welding seat provided in this application;

[0034] Figure 5 A schematic diagram of the use of an embodiment of the ultrasonic welding equipment provided in this application;

[0035] Figure 6 for Figure 5 A partial enlarged view of the middle position A;

[0036] Figure 7 A schematic structural diagram of another embodiment of the ultrasonic welding base provided in the present application;

[0037] Figure 8 A schematic diagram of a plate to be welded corresponding to another embodiment of the ultrasonic welding base provided in the present application;

[0038] Fig. 9 A schematic structural diagram of another embodiment of the ultrasonic welding base provided in the present application;

[0039] Fig.10 A schematic diagram of a plate to be welded corresponding to another embodiment of the ultrasonic welding base provided in the present application;

[0040] Fig.11 A schematic structural diagram of another embodiment of the ultrasonic welding base provided in the present application;

[0041] Fig.12 A schematic diagram of a plate to be welded corresponding to another embodiment of the ultrasonic welding base provided in the present application;

[0042] Fig.13 A schematic diagram of a plate to be welded corresponding to another embodiment of the ultrasonic welding base provided in the present application;

[0043] Fig.14 This is a schematic diagram of placing the plates to be welded in another embodiment of the present application;

[0044] Fig.15 A schematic diagram of the connection of the plates to be welded corresponding to another embodiment of the present application;

[0045] Fig.16 A schematic diagram of another embodiment of the ultrasonic welding equipment provided in the present application;

[0046] Fig.17 This is a schematic diagram of the cross-sectional view of another embodiment of the present application;

[0047] Fig.18 for Fig.17 A partial enlarged view of point C in the middle.

[0048] Description of Figure Numbers:

[0049] 100. Ultrasonic welding equipment;

[0050] 110. Ultrasonic welding head; 111. Welding teeth;

[0051] 120, ultrasonic welding seat; 121, boss; 122, first inclined wall section; 123, first flat wall section;

[0052] 130, support plate; 131, groove; 132, through hole; 133, limit block;

[0053] 200, plate to be welded; 201, concave cavity; 202, second inclined wall segment; 203, second flat wall segment;

[0054] 210, top cover structure; 211, pole; 220, adapter;

[0055] 300, bare battery cell; 310, tab; 311, weld mark; 320, battery cell body.

[0056] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0058] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0059] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0060] In the production process of lithium batteries, sodium batteries and other types of batteries, ultrasonic welding equipment such as ultrasonic welding machines are usually used to weld the tabs of bare cells to adapters or pins, and then one or more bare cells are assembled with a top cover structure, a battery casing, etc. to form a battery cell.

[0061] When the ultrasonic welding equipment adopts the fixed energy welding mode, it can be understood that the total energy output of the ultrasonic welding equipment for a single welding is fixed. Sometimes, the welding between the bare battery cell's tab waiting to be welded structure and the adapter plate waiting to be welded will have the problem of cold welding.

[0062] Reference Figure 1 and Figure 2The ultrasonic welding equipment in the related art usually includes an ultrasonic generator, a transducer, an amplitude variation device, an ultrasonic welding head 110a and an ultrasonic welding seat 120a, wherein the ultrasonic welding head 110a and the ultrasonic welding seat 120a are arranged relative to each other so that the ultrasonic welding head 110a and the ultrasonic welding seat 120a can be further approached to each other to compact the tab 310a and the adapter 220a of the bare battery cell and wait for the welding plate 200a for subsequent ultrasonic welding. Among them, the ultrasonic welding equipment is also called an ultrasonic welding machine. The ultrasonic welding equipment converts an electric current of about 50 to 60 Hz into electrical energy of about 15 to 75 kHz through an ultrasonic generator; the high-frequency electrical energy obtained by the conversion is converted again into mechanical motion of the same frequency through a transducer, and then the mechanical motion is transmitted to the ultrasonic welding head 110a through a set of amplitude changing devices such as amplitude changing rods that can change the amplitude, thereby forming the vibration of the ultrasonic welding head 110a; the ultrasonic welding head 110a transmits the received vibration energy to the joint of the workpieces to be welded (such as the above-mentioned pole ear 310a and adapter plate 220a), and the vibration energy is converted into heat energy in this area by friction, thereby melting the two workpieces to be welded for welding.

[0063] In the related art, refer to Figure 2 The ultrasonic welding head 110a and the ultrasonic welding seat 120a of the ultrasonic welding equipment are respectively provided with thin and sharp welding teeth on the end faces, so as to fix the two workpieces to be welded (such as the above-mentioned pole ear 310a and the adapter 220a) during the process of compacting the two workpieces to be welded, so that the workpieces to be welded remain stationary relative to the ultrasonic welding head 110a during the ultrasonic welding process, so that the effective energy of welding is utilized to the maximum extent. In the related art, the welding teeth of the ultrasonic welding seat will wear after a certain number of weldings, thereby causing the adapter 220a to move relative to the welding plate 200a and the ultrasonic welding seat 120a, thereby consuming part of the energy of the ultrasonic welding equipment between the ultrasonic welding seat 120a and the plate 200a to be welded, and this part of the energy becomes useless work. In the constant energy welding mode, this part of useless work consumes the total energy, which may lead to insufficient welding energy between the two workpieces to be welded (such as the above-mentioned pole ear 310a and adapter plate 220a), which may easily cause batch cold welding problems; on the other hand, because the welding teeth of the ultrasonic welding seat 120a wear quickly, the ultrasonic welding seat 120a is replaced more frequently, resulting in an increase in parts cost and personnel workload.

[0064] Therefore, based on the above considerations, in order to reduce the risk of a cold weld, the present application proposes an ultrasonic welding seat, an ultrasonic welding device and a support plate thereof. When used, the ultrasonic welding seat, the ultrasonic welding device and the support plate thereof can reduce the risk of the plate to be welded moving relative to the ultrasonic welding seat, thereby reducing the energy consumed between the ultrasonic welding seat and the plate to be welded.

[0065] Next, the structure of the ultrasonic welding seat, ultrasonic welding equipment and its supporting plate proposed in this application will be explained with specific implementation methods.

[0066] The ultrasonic welding device 100 includes an ultrasonic generator, a transducer, an amplitude varying device, an ultrasonic welding head 110 and an ultrasonic welding seat 120; Figure 3 and Figure 4 , the ultrasonic welding seat 120 is arranged relative to the ultrasonic welding head 110 of the ultrasonic welding device 100, for example, relatively arranged along the up and down direction in the figure; refer to Figure 4 , a boss 121 is provided at one end of the ultrasonic welding seat 120; Figure 5 and Figure 6 The boss 121 is used to be embedded in the cavity 201 of the plate 200 to be welded, and the side wall surface of the boss 121 is used to abut against the side wall surface of the cavity 201.

[0067] The ultrasonic welding seat 120 can be understood as a seat structure that can provide support for the plate to be welded 200 during the ultrasonic welding process; the plate to be welded 200 can be set as Figure 5 Of course, the plate to be welded 200 can also be set as a top cover structure of a battery cell. Figure 5 and Figure 6 The plate 200 to be welded can be welded to the tab 310 of the bare cell of the battery cell. It can be understood that the tab 310 is welded and fixed together with the adapter sheet 220 or the top cover structure through an ultrasonic welding process, and then assembled with the battery shell and other structures to form a battery cell.

[0068] In addition, refer to Figure 4 or Figure 5The boss 121 can be understood as a block-shaped structure protruding from the end face of the ultrasonic welding seat 120 (for example, protruding from the upper end face of the ultrasonic welding seat 120 in the figure), and the side wall surface of the boss 121 can be understood as the side wall surface in the height direction of the boss 121, such as the left and right wall surfaces in the figure. The cavity 201 can be understood as a concave structure on the surface of the plate 200 to be welded, such as a pit, a groove, etc.; the side wall surface of the cavity 201 can be understood as the side wall surface in the depth direction of the cavity 201, such as the left and right wall surfaces in the figure. It can be understood that in order to facilitate the embedding of the boss 121 into the cavity 201 and to ensure that the side wall surface of the boss 121 maintains a stable abutment with the side wall surface of the cavity 201, the end of the boss 121 away from the ultrasonic welding seat 120 can be set to be relatively small and the end of the boss 121 away from the ultrasonic welding seat 120 can be set to be relatively large. For example, the boss 121 can be set to a conical table, a polygonal frustum, etc.; of course, the end of the boss 121 away from the ultrasonic welding seat 120 and the end of the boss 121 away from the ultrasonic welding seat 120 can also be set to the same size. For example, the boss 121 can be set to a cylindrical table, a polygonal prism, etc.

[0069] When the ultrasonic welding device 100 in this embodiment is in use, the boss 121 on the end of the ultrasonic welding seat 120 can be embedded in the cavity 201 of the plate 200 to be welded, and the side wall surface of the boss 121 can abut against the side wall surface of the cavity 201, thereby reducing the risk of the plate 200 to be welded moving relative to the ultrasonic welding seat 120, for example, reducing the risk of the plate 200 to be welded moving relative to the ultrasonic welding seat 120. Figure 5 The risk of movement in the left and right directions is reduced, which reduces the energy consumed between the ultrasonic welding seat 120 and the plate to be welded 200, so that the welding energy is more concentrated between the plate to be welded 200 and the tab 310 waiting for welding structure, reducing the risk of cold welding between the plate to be welded 200 and the structure to be welded.

[0070] In addition, since the risk of the plate to be welded 200 moving relative to the ultrasonic welding seat 120 is reduced, the risk of the boss 121 on the end face of the ultrasonic welding seat 120 being worn by the plate to be welded 200 is reduced, and the overall service life of the ultrasonic welding seat 120 is longer, thereby reducing the replacement frequency of the ultrasonic welding seat 120 and reducing the overall use cost of the ultrasonic welding seat 120; on the other hand, the risk of the boss 121 being worn by the plate to be welded 200 is reduced, reducing the dust formed between the plate to be welded 200 and the ultrasonic welding seat 120, which is beneficial to improving the overall quality of the corresponding battery cell, for example, it is beneficial to improve the cleanliness of the corresponding battery cell.

[0071] In some embodiments, reference Figure 4 or Figure 5The side wall surface of the boss 121 includes a first inclined wall surface segment 122, which can be understood as a wall surface segment inclined in the height direction of the boss 121; wherein, the entire side wall surface of the boss 121 can be inclined, or a part of the side wall surface of the boss 121 can be inclined, and this embodiment does not limit this.

[0072] Correspondingly, refer to Figure 6 The side wall of the cavity 201 may include a second inclined wall segment 202, which may be understood as a wall segment inclined in the depth direction of the cavity 201; wherein the entire side wall of the cavity 201 may be inclined, or a portion of the side wall of the cavity 201 may be inclined, and this is not limited in this embodiment. wherein the first inclined wall segment 122 and the second inclined wall segment 202 may be arranged relative to each other in position, so that the first inclined wall segment 122 abuts against the second inclined wall segment 202, so that the ultrasonic welding seat 120 and the plate 200 to be welded may move relative to each other along the surface of the plate 200 to be welded. It can be understood that, when there is a certain deviation between the relative positions of the boss 121 and the cavity 201 and the deviation is small, during the process of the boss 121 being embedded in the cavity 201, the boss 121 can convert the movement of the boss 121 along the height direction relative to the cavity 201 into the movement of the plate to be welded 200 perpendicular to the height direction of the boss 121 through the mutual contact between the first inclined wall section 122 and the second inclined wall section 202, for example, Figure 5 , Figure 6 The ultrasonic welding seat 120 can move in the horizontal direction to guide the plate 200 to be welded, thereby improving the alignment between the ultrasonic welding seat 120 and the plate 200 to be welded. After the ultrasonic welding seat 120 and the plate 200 to be welded are aligned, the abutment between the first inclined wall section 122 and the second inclined wall section 202 can ensure the position stability of the ultrasonic welding seat 120 and the plate 200 to be welded in the direction perpendicular to the height of the boss 121.

[0073] That is, in this embodiment, the ultrasonic welding seat 120 can abut the second inclined wall section 202 through the first inclined wall section 122, so that the ultrasonic welding seat 120 and the plate to be welded 200 can move relative to each other along the surface of the plate to be welded 200, thereby facilitating compatibility with the positioning deviation between the ultrasonic welding seat 120 and the plate to be welded 200, and improving the alignment degree between the ultrasonic welding seat 120 and the plate to be welded 200.

[0074] In some embodiments, reference Figure 4 The first inclined wall segment 122 is configured to be arc-shaped, and the arc-shaped central axis of the first inclined wall segment 122 (refer to Figure 4The first inclined wall segment 122 intersects with the top surface of the boss 121, for example, the arc-shaped central axis of the first inclined wall segment 122 is perpendicular to the top surface of the boss 121 or inclined to the top surface of the boss 121; specifically, the boss 121 can be set as Figure 4 Correspondingly, the second inclined wall segment 202 is set to be arc-shaped, and the arc-shaped central axis of the second inclined wall segment 202 intersects the surface of the plate to be welded 200, so that the arc-shaped second inclined wall segment 202 and the arc-shaped first inclined wall segment 122 are stably abutted.

[0075] In this embodiment, the first inclined wall segment 122 and the second inclined wall segment 202 are respectively configured to be arc-shaped, which is conducive to guiding in more directions of the arc-shaped surface. For example, Figure 4 Guiding in the left and right directions and the front and back directions is beneficial to further improve the alignment degree between the ultrasonic welding seat 120 and the plate to be welded 200.

[0076] In some embodiments, reference Figure 5 and Figure 6 A preset angle B is formed between the end face of the ultrasonic welding seat 120 having the boss 121 and the first inclined wall section 122. The preset angle B is greater than 90 degrees and less than or equal to 120 degrees, wherein the preset angle B can be set to 95 degrees, 105 degrees, 115 degrees, 120 degrees, etc.

[0077] In this embodiment, the preset angle B is greater than 90 degrees and less than or equal to 120 degrees, so that the side wall surface of the boss 121 is relatively steep; when the root size of the boss 121 and the height of the boss 121 are constant, the area of ​​the top of the boss 121 is increased, the risk of the top of the boss 121 being worn by the plate 200 to be welded is reduced, the risk of relative movement between the plate 200 to be welded and the ultrasonic welding seat 120 to cause a cold weld is reduced, and the risk of dust formation due to wear is reduced.

[0078] In some embodiments, reference Figure 4 or Figure 5 The top of the boss 121 is set to be a flat surface. The flat surface can be understood as a relatively flat surface relative to the above-mentioned arc-shaped side wall surface.

[0079] In this embodiment, the top of the boss 121 is set to a flat surface. Compared with the tip of the welding tooth, the area of ​​the top of the boss 121 is relatively large, which reduces the risk of the top of the boss 121 being worn by the plate 200 to be welded, reduces the risk of relative movement between the plate 200 to be welded and the ultrasonic welding seat 120 to cause a cold weld, and reduces the risk of dust formation due to wear.

[0080] In some embodiments, the ratio of the area of ​​the top surface of the boss 121 to the cross-sectional area of ​​the root of the boss 121 is greater than or equal to 0.2, wherein the top surface of the boss 121 can be set as the above-mentioned flat surface. For example, the ratio of the area of ​​the top surface of the boss 121 to the cross-sectional area of ​​the root of the boss 121 can be set to 0.2, 0.4, 0.6, 0.8, 1, etc.

[0081] In this embodiment, the ratio of the area of ​​the top surface of the boss 121 to the cross-sectional area of ​​the root of the boss 121 is greater than or equal to 0.2. Relative to the tip of the welding tooth, the area of ​​the top of the boss 121 is relatively large, which further reduces the risk of the top of the boss 121 being worn by the plate 200 to be welded, further reduces the risk of relative movement between the plate 200 to be welded and the ultrasonic welding seat 120 to cause a cold weld, and reduces the risk of dust formation due to wear.

[0082] In some embodiments, reference Figure 6 , the dimension L1 of the root of the boss 121 in a preset direction is greater than the dimension L2 of the mouth of the cavity 201 in a preset direction, and the preset direction is perpendicular to the height direction of the boss 121, for example Figure 6 The preset direction is parallel to the left and right direction.

[0083] In this embodiment, the root of the boss 121 can be embedded in the mouth of the cavity 201 by utilizing elastic-plastic deformation, so that the root of the boss 121 and the mouth of the cavity 201 form an interference fit, thereby improving the connection stability between the ultrasonic welding seat 120 and the plate to be welded 200, and further reducing the risk of a cold weld caused by the plate to be welded 200 moving relative to the ultrasonic welding seat 120.

[0084] In some embodiments, reference Figure 7 and Figure 8 , the boss 121 can be set as a cylindrical boss; correspondingly, the cavity 201 can be set as a cylindrical hole.

[0085] In this embodiment, the boss 121 is configured as a cylindrical table or a polygonal table, and the area of ​​the top of the boss 121 is relatively large, which improves the connection stability between the ultrasonic welding seat 120 and the plate to be welded 200, reduces the risk of the top of the boss 121 being worn by the plate to be welded 200, reduces the risk of relative movement between the plate to be welded 200 and the ultrasonic welding seat 120 and causing a cold weld, and reduces the risk of dust formation due to wear.

[0086] In some embodiments, reference Fig. 9 and Fig.10 The boss 121 can be configured as a polygonal frustum, and the cavity 201 can be configured as a polygonal pyramid correspondingly; for example, the boss 121 can be configured as a triangular frustum, a quadrangular frustum, etc.

[0087] In some embodiments, reference Fig.11 and Fig.12 The boss 121 can be configured as a polygonal prism, and the cavity 201 can be correspondingly configured as a polygonal prism hole; for example, the boss 121 can be configured as a triangular prism, a quadrangular prism, etc.

[0088] In the above-mentioned embodiment, the boss 121 is set as a conical cone or a polygonal cone, which can form the above-mentioned first inclined wall section 122 through the side wall surface, thereby being conducive to compatibility with the positioning deviation between the ultrasonic welding seat 120 and the plate to be welded 200, and improving the alignment degree between the ultrasonic welding seat 120 and the plate to be welded 200.

[0089] In some embodiments, reference Fig. 9 and Fig.10 , or refer to Fig.11 and Fig.12 The side wall of the boss 121 includes a first flat wall segment 123, and the side wall of the cavity 201 includes a second flat wall segment 203. The first flat wall segment 123 is used to abut against the second flat wall segment 203, and the first flat wall segment 123 is used to intersect with the vibration direction of the ultrasonic horn 110. The vibration direction of the ultrasonic horn 110 refers to the X direction in the figure.

[0090] In this embodiment, the ultrasonic welding seat 120 can abut the second flat wall section 203 through the first flat wall section 123, and make the first flat wall section 123 intersect with the vibration direction of the ultrasonic welding head 110, thereby reducing the local pressure of the vibrating ultrasonic welding head 110 on the boss 121, reducing the risk of the top of the boss 121 being worn by the plate to be welded 200, reducing the risk of relative movement between the plate to be welded 200 and the ultrasonic welding seat 120 to cause a cold weld, and reducing the risk of dust formation due to wear.

[0091] In other embodiments, reference Fig.13 The above-mentioned plate to be welded 200 can be set as the top cover structure 210 of the battery cell. Fig.13 The top cover structure 210 is a schematic diagram of an embodiment of the top cover structure 210 in a bottom view. The top cover structure 210 may include a pole 211, one end of which may be protruding from the top cover structure 210; the above-mentioned cavity 201 may be arranged on the end surface of the pole 211, and specifically, the cavity 201 may be arranged on the end surface of the pole 211 protruding from the end of the top cover structure 210, for example, the cavity 201 may be arranged on the end surface of the pole 211 protruding from the end of the top cover structure 210. Fig.13 The upper end surface of the middle pole 211.

[0092] In addition, refer to Fig.14The ultrasonic welding device 100 may further include a support plate 130, a groove 131 is provided on the surface of the support plate 130, and a through hole 132 is provided on the bottom wall of the groove 131; Fig.15 and Fig.16 The plate 200 to be welded is used to be placed in the groove 131, and the side of the plate 200 to be welded with the cavity 201 is used to face the through hole 132. Specifically, referring to Fig.17 and Fig.18 , one end of the pole 211 protruding from the top cover structure 210 can pass through the through hole 132 and abut against the hole wall of the through hole 132 , specifically, the side wall surface of the pole 211 can abut against the hole wall of the through hole 132 .

[0093] In this embodiment, the plate 200 to be welded can be positioned by the boss 121 of the ultrasonic welding seat 120 through the cavity 201. Since the force acting on the support plate 130 due to the welding vibration of the plate 200 to be welded is reduced, it is beneficial to make the support plate 130 have sufficient structural strength when the groove 131 is provided, and it is beneficial to improve the positioning efficiency of the plate 200 to be welded through the groove 131 of the support plate 130. It can be understood that the plate 200 to be welded can be conveniently placed in the groove 131 to complete the positioning. In addition, after the plate 200 to be welded is placed in the groove 131, the surface flatness between the plate 200 to be welded and the support plate 130 is higher, for example, the height of the top cover structure 210 protruding from the support plate 130 is reduced, which is beneficial to reduce the risk of accidental bending of the tab 310 waiting for welding structure.

[0094] In some embodiments, reference Fig.18 The ultrasonic welding head 110 is used to have a welding tooth 111 at one end facing the ultrasonic welding seat 120. The cross-sectional area of ​​the root of the boss 121 is larger than the cross-sectional area of ​​the root of the welding tooth 111. It can be understood that the boss 121 is thicker than the welding tooth 111.

[0095] In this embodiment, the cross-sectional area of ​​the root of the boss 121 is larger than the cross-sectional area of ​​the root of the welding tooth 111 of the ultrasonic welding head 110, and the area of ​​the top of the boss 121 is relatively large, which further reduces the risk of the top of the boss 121 being worn by the plate 200 to be welded, further reduces the risk of relative movement between the plate 200 to be welded and the ultrasonic welding seat 120 to cause a cold weld, and reduces the risk of dust formation due to wear.

[0096] In some embodiments, reference Fig.14 and Fig.16 The side of the support plate 130 provided with the groove 131 is also provided with at least one stopper 133, which is arranged at the outer edge of the support plate 130, and is used to abut against the outer edge of the bare cell 300, and the tab 310 of the bare cell 300 is used to be welded with the plate 200 to be welded. It can be understood that, referring to Fig.15 and Fig.16 The bare cell 300 includes a tab 310 and a cell body 320. The bare cell 300 having the tab 310 and the cell body 320 can be formed by winding, lamination, and the like. The support plate 130 and the stopper 133 can be integrally formed. Of course, the support plate 130 and the stopper 133 can also be connected by welding, clamping, plugging, and the like. Fig.16 The ultrasonic welding equipment can form a welding mark 311 on the electrode ear 310 on the to-be-welded plate 200 placed on the support plate 130 through the ultrasonic welding head 110 and the ultrasonic welding seat 120 .

[0097] In this embodiment, the limiting block 133 can fix the bare battery cell 300 by abutting against the outer edge of the bare battery cell 300 , thereby improving the efficiency of placing the bare battery cell 300 on the support plate 130 .

[0098] In some embodiments, at least two limit blocks 133 are disposed at the outer edge of the support plate 130 , and the limit blocks 133 are spaced apart along the outer edge of the support plate 130 . For example, a plurality of limit blocks 133 may be spaced apart along the circumference of the support plate 130 .

[0099] In this embodiment, at least two limit blocks 133 spaced apart along the outer edge of the support plate 130 increase the support position for the bare cell 300 , thereby improving the placement stability of the bare cell 300 on the support plate 130 .

[0100] The present application also proposes a support plate 130, a groove 131 is provided on the surface of the support plate 130, and a through hole 132 is provided on the bottom wall of the groove 131; the plate 200 to be welded is used to be placed in the groove 131, and the side of the plate 200 to be welded with the cavity 201 is used to face the through hole 132, and the through hole 132 is used for the above-mentioned boss 121 to be embedded in the cavity 201.

[0101] Reference Figures 1 to 12In one embodiment of the present application, the ultrasonic welding seat 120 is used to be arranged opposite to the ultrasonic welding head 110 of the ultrasonic welding device 100. A boss 121 is provided at one end of the ultrasonic welding seat 120. The boss 121 is used to be embedded in the concave cavity 201 of the plate 200 to be welded, and the side wall surface of the boss 121 is used to abut the side wall surface of the concave cavity 201. The side wall surface of the boss 121 includes a first inclined wall surface segment 122, and the side wall surface of the concave cavity 201 includes a second inclined wall surface segment 202; the first inclined wall surface segment 122 is used to abut the second inclined wall surface segment 202, so that the ultrasonic welding seat 120 and the plate 200 to be welded move relative to each other along the surface of the plate 200 to be welded. The first inclined wall surface segment 122 is set to be arc-shaped, and the arc-shaped central axis of the first inclined wall surface segment 122 intersects with the top surface of the boss 121; the second inclined wall surface segment 202 is set to be arc-shaped, and the arc-shaped central axis of the second inclined wall surface segment 202 intersects with the surface of the plate 200 to be welded. The end surface of the ultrasonic welding seat 120 provided with the boss 121 and the first inclined wall section 122 form a preset angle, and the preset angle is greater than 90 degrees and less than or equal to 120 degrees. The size of the root of the boss 121 in the preset direction is greater than the size of the mouth of the cavity 201 in the preset direction, and the preset direction is perpendicular to the height direction of the boss 121. The top of the boss 121 is set as a flat surface. The ratio of the area of ​​the top surface of the boss 121 to the cross-sectional area of ​​the root of the boss 121 is greater than or equal to 0.2; and / or, the boss 121 is set as one of a cylindrical table, a polygonal prism table, a conical table, and a polygonal truncated pyramid. The side wall surface of the boss 121 includes a first flat wall section 123, and the side wall surface of the cavity 201 includes a second flat wall section 203. The first flat wall section 123 is used to abut the second flat wall section 203, and the first flat wall section 123 is used to intersect with the vibration direction of the ultrasonic welding head 110. The ultrasonic welding device 100 comprises an ultrasonic generator, a transducer, an amplitude varying device, an ultrasonic horn 110 and the ultrasonic welding seat 120. The ultrasonic horn 110 is provided with a welding tooth 111 at one end facing the ultrasonic welding seat 120, and the cross-sectional area of ​​the root of the boss 121 is larger than the cross-sectional area of ​​the root of the welding tooth 111.

[0102] It can be understood that the specific structures of the ultrasonic welding seat 120 and the support plate 130 proposed in the present application refer to the above-mentioned embodiments. Since the ultrasonic welding seat 120 and the support plate 130 adopt all the technical solutions of all the above-mentioned embodiments, they at least have all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0103] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. An ultrasonic welding seat, characterized in that: The ultrasonic welding seat is used to be arranged opposite to the ultrasonic welding head of the ultrasonic welding equipment. A boss is provided at one end of the ultrasonic welding seat. The boss is used to be embedded in the cavity of the plate to be welded, and the side wall surface of the boss is used to abut the side wall surface of the cavity.

2. The ultrasonic welding seat according to claim 1, characterized in that: The side wall surface of the boss includes a first inclined wall segment, and the side wall surface of the cavity includes a second inclined wall segment; the first inclined wall segment is used to abut the second inclined wall segment so that the ultrasonic welding seat and the plate to be welded can move relative to each other along the surface of the plate to be welded.

3. The ultrasonic welding seat according to claim 2, characterized in that: The first inclined wall segment is set to an arc shape, and the arc center axis of the first inclined wall segment intersects with the top surface of the boss; the second inclined wall segment is set to an arc shape, and the arc center axis of the second inclined wall segment intersects with the surface of the plate to be welded.

4. The ultrasonic welding seat according to claim 2, characterized in that: A preset angle is formed between the end surface of the ultrasonic welding seat provided with the boss and the first inclined wall segment, and the preset angle is greater than 90 degrees and less than or equal to 120 degrees.

5. The ultrasonic welding seat according to any one of claims 1 to 4, characterized in that: The size of the root of the boss in a preset direction is greater than the size of the mouth of the cavity in the preset direction, and the preset direction is perpendicular to the height direction of the boss.

6. The ultrasonic welding seat according to any one of claims 1 to 4, characterized in that: The top end of the boss is configured as a flat surface.

7. The ultrasonic welding seat according to claim 6, characterized in that: The ratio of the area of ​​the top end surface of the boss to the cross-sectional area of ​​the root of the boss is greater than or equal to 0.2; and / or the boss is configured as one of a cylindrical table, a polygonal prism table, a conical table, and a polygonal truncated pyramid.

8. The ultrasonic welding seat according to any one of claims 1 to 4, characterized in that: The side wall surface of the boss includes a first flat wall segment, and the side wall surface of the cavity includes a second flat wall segment. The first flat wall segment is used to abut against the second flat wall segment, and the first flat wall segment is used to intersect with the vibration direction of the ultrasonic horn.

9. An ultrasonic welding device, characterized in that: The ultrasonic welding equipment comprises an ultrasonic generator, a transducer, an amplitude variation device, an ultrasonic welding head and an ultrasonic welding seat as claimed in any one of claims 1 to 8.

10. The ultrasonic welding device according to claim 9, characterized in that: The ultrasonic welding head is provided with a welding tooth at one end facing the ultrasonic welding seat, and the cross-sectional area of ​​the root of the boss is larger than the cross-sectional area of ​​the root of the welding tooth.

11. The ultrasonic welding device according to claim 9 or 10, characterized in that: The ultrasonic welding equipment also includes a support plate, a surface of the support plate is provided with a groove, and the bottom wall of the groove is provided with a through hole; the plate to be welded is used to be placed in the groove, and the side of the plate to be welded provided with the concave cavity is used to face the through hole.

12. A support plate, characterized in that: A groove is provided on the surface of the support plate, and a through hole is provided on the bottom wall of the groove; the plate to be welded is used to be placed in the groove, and the side of the plate to be welded provided with the concave cavity is used to face the through hole, and the through hole is used for the boss of the ultrasonic welding seat as described in any one of claims 1 to 8 to be embedded in the concave cavity.

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