Welding pressing tool and welding device

Abstract

The utility model provides a welding pressing tool and a welding device, and relates to the technical field of batteries. The welding pressing tool comprises a pressing plate, a first pressing head and a second pressing head. The pressing plate comprises a first surface and a second surface which are opposite. The plurality of first pressure heads are arranged on the first surface at intervals; the second pressing heads are arranged at least one end of the first surface in the first direction at intervals, the maximum size of the second pressing heads in the second direction is smaller than that of the first pressing heads in the second direction, the first direction is parallel to the first surface, and the second direction is the arrangement direction from the first surface to the second surface. The first pressing head and the second pressing head are arranged on the first surface, the second pressing head is located on at least one side of the first pressing head in the first direction, and the second pressing head abuts against the inclined edge when the electrode lug is welded, so that the contact area of the welding pressing tool and the edge of the electrode lug can be increased, and the pressure intensity of the welding pressing tool on the edge of the electrode lug is reduced; therefore, the risk of stress damage in the edge area of the tab is reduced, and the quality of the tab after welding is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a welding press and a welding device. Background Art

[0002] Batteries are widely used in electronic devices, such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes and power tools, etc.

[0003] In the production process of batteries, it is necessary to weld the tabs. How to improve the welding quality of the tabs is a research direction in battery technology. Utility Model Content

[0004] The present application provides a welding press and a welding device, which can improve the welding quality of the tab.

[0005] In the first aspect, the embodiment of the present application provides a welding press, including a pressing plate, a first pressing head and a second pressing head, the pressing plate including a first surface and a second surface opposite to each other; a plurality of the first pressing heads are arranged at intervals on the first surface; a plurality of the second pressing heads are arranged at intervals on the first surface and are located at least on one side of the plurality of the first pressing heads along the first direction, the maximum dimension of the second pressing head along the second direction is smaller than the maximum dimension of the first pressing head along the second direction, the first direction is parallel to the first surface, and the second direction is the arrangement direction from the first surface to the second surface. The present application provides a first pressing head and a second pressing head on the first surface, the second pressing head is located at least on one side of the first pressing head in the first direction, and the second pressing head is counteracted with the inclined edge when welding the pole lug, so that the contact area between the welding press and the pole lug edge can be increased, and the pressure of the welding press on the pole lug edge can be reduced, thereby reducing the risk of stress damage in the pole lug edge area and improving the quality of the pole lug after welding.

[0006] In some embodiments of the present application, the maximum dimension of the second press head along the first direction is smaller than the maximum dimension of the first press head along the first direction. The present application satisfies the requirement of setting the second press head at the edge of the first surface and saves consumables by designing the maximum dimension of the second press head in the first direction to be smaller.

[0007] In some embodiments of the present application, the maximum dimension of the second press head along the third direction is smaller than the maximum dimension of the first press head along the third direction, and the third direction is parallel to the first surface and intersects with the first direction. The present application satisfies the requirement of setting the second press head at the edge of the first surface and saves consumables by designing the maximum dimension of the second press head in the third direction to be smaller.

[0008] In some embodiments of the present application, the outer surface of the first pressure head includes a first spherical surface, and the outer surface of the second pressure head includes a second spherical surface. The first spherical surface and the second spherical surface of the present application can improve the uniformity of pressure head welding, reduce damage, and adapt to welding tabs of different shapes, which helps to improve welding quality and efficiency.

[0009] In some embodiments of the present application, the ratio of the radius of the second spherical surface to the radius of the first spherical surface is 0.2-0.4. The present application designs the ratio of the radius of the second spherical surface to the radius of the first spherical surface to be 0.2-0.4, which not only facilitates the arrangement of the second pressure head at the edge of the first surface and reduces consumables, but also enables the second pressure head to better fit the edge of the tab.

[0010] In some embodiments of the present application, along the first direction, the first pressing head has multiple columns, and each column of the first pressing head includes multiple first pressing heads arranged at intervals along a third direction, and the third direction is parallel to the first surface and intersects with the first direction. The present application designs the first pressing head to have multiple columns, which can increase the contact area with the tab, provide better support for the tab during welding, and evenly distribute pressure, thereby improving welding quality and stability.

[0011] In some embodiments of the present application, along the first direction, the plurality of second pressure heads located at one end of the first surface have at least one column, each column of the second pressure heads includes a plurality of second pressure heads arranged at intervals along the third direction, and the number of the second pressure heads in each column is greater than the number of the first pressure heads in each column. The present application designs the number of the second pressure heads in a column to be greater than the number of the first pressure heads in a column, thereby further increasing the contact area of ​​the edge of the welding press at the edge of the pole lug, and further improving the quality of the pole lug after welding.

[0012] In some embodiments of the present application, the welding press further includes a third pressing head, a plurality of the third pressing heads are spaced apart and arranged at at least one end of the first surface along a third direction, the third direction is parallel to the first surface and intersects with the first direction, and the maximum dimension of the third pressing head along the second direction is smaller than the maximum dimension of the first pressing head along the second direction. The present application further increases the contact area between the welding press and the edge of the pole lug by arranging the third pressing head on the first surface, the third pressing head is located on at least one side of the first pressing head in the third direction, and the third pressing head abuts against the edge of the pole lug, thereby reducing the compressive stress of the welding press on the edge of the pole lug, thereby reducing the risk of stress damage in the edge area of ​​the pole lug, and improving the quality of the pole lug after welding.

[0013] In some embodiments of the present application, the maximum dimension of the third press head along the first direction is smaller than the maximum dimension of the first press head along the first direction. The present application satisfies the requirement of setting the third press head at the edge of the first surface and saves consumables by designing the maximum dimension of the third press head in the first direction to be smaller.

[0014] In some embodiments of the present application, the maximum dimension of the third press head along the third direction is smaller than the maximum dimension of the first press head along the third direction. The present application satisfies the requirement of setting the third press head at the edge of the first surface and saves consumables by designing the maximum dimension of the third press head in the third direction to be smaller.

[0015] In some embodiments of the present application, the outer surface of the first pressure head includes a first spherical surface, and the outer surface of the third pressure head includes a third spherical surface. The first spherical surface and the third spherical surface of the present application can improve the uniformity of pressure head welding, reduce damage, and adapt to welding tabs of different shapes, which helps to improve welding quality and efficiency.

[0016] In some embodiments of the present application, the ratio of the radius of the third spherical surface to the radius of the first spherical surface is 0.2-0.4. The present application designs the ratio of the radius of the third spherical surface to the radius of the first spherical surface to be 0.2-0.4, which not only facilitates the arrangement of the third pressure head at the edge of the first surface and reduces consumables, but also enables the third pressure head to better fit the edge of the tab.

[0017] In some embodiments of the present application, the first surface includes a main body and first chamfered portions located at both ends of the main body along the first direction, the first pressure head and the second pressure head are arranged on the main body, and in the direction away from the main body in the first direction, the distance between the first chamfered portion and the second surface in the second direction gradually decreases. By configuring the first chamfered portion, the present application can better adapt to the inclined edge presented during the welding of the tab, thereby further increasing the contact area between the welding press and the tab and improving the quality of the tab welding.

[0018] In some embodiments of the present application, the first surface further includes a second chamfered portion located at both ends of the main body along the third direction, each of the second chamfered portions is connected to two of the first chamfered portions, and in the direction away from the main body along the third direction, the distance between the second chamfered portion and the second surface in the third direction gradually decreases, and the third direction is parallel to the first surface and intersects with the first direction. By configuring the second chamfered portion, the present application can better adapt to the inclined edge presented during the welding of the tab, thereby further increasing the contact area between the welding press and the tab and improving the quality of the tab welding.

[0019] In a second aspect, an embodiment of the present application provides a welding device, comprising a welding press as described in any one of the above technical solutions.

[0020] In some embodiments of the present application, the embodiments of the present application provide a welding device, including a moving component, an ultrasonic component and a welding press as described in the above technical solution, wherein the moving component is connected to the welding press and is used to drive the welding press to move, and the ultrasonic component is connected to the moving component and is used to drive the welding press to vibrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application 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 drawings without paying creative work.

[0022] Figure 1 A schematic structural diagram of a welding press provided in some embodiments of the present application at a first viewing angle;

[0023] Figure 2 A schematic diagram of the structure of a welding press provided in some embodiments of the present application at a second viewing angle;

[0024] Figure 3 A schematic structural diagram of a welding press provided in some embodiments of the present application at a first viewing angle;

[0025] Figure 4 A schematic diagram of a working state of a welding press provided in some embodiments of the present application during welding;

[0026] Figure 5 A schematic structural diagram of another welding press provided in some embodiments of the present application at a first viewing angle;

[0027] Figure 6 A schematic structural diagram of another welding press provided in some embodiments of the present application at a second viewing angle;

[0028] Figure 7 A schematic structural diagram of another welding press provided in some embodiments of the present application at a first viewing angle;

[0029] Figure 8 A schematic diagram of the structure of a welding device provided in some embodiments of the present application.

[0030] The reference numerals of the specific embodiments are as follows:

[0031] 100. Welding press;

[0032] 10. Pressing plate; 11. First surface; 111. Main body; 112. First chamfered portion; 113. Second chamfered portion; 12. Second surface; 13. Side surface; 14. Rounded corner;

[0033] 20. a first pressure head; 21. a first spherical surface;

[0034] 30. second pressure head; 22. second spherical surface;

[0035] 40. third pressure head; 23. third spherical surface;

[0036] 200, tab; 300, adapter; 400, welding seat; 500, moving assembly; 600, ultrasonic welding assembly; 700, frame;

[0037] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0040] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0043] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0044] The term "plurality" used in the present application refers to two or more (including two).

[0045] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a battery box for encapsulating one or more battery cells. The battery box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0046] The battery cells mentioned in the embodiments of the present application may be lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells or magnesium-ion battery cells, etc., which are not limited in the embodiments of the present application. The battery cells may be cylindrical, flat, cuboid or other shapes, which are not limited in the embodiments of the present application.

[0047] The battery cell mentioned in the embodiments of the present application may include an electrode assembly and an electrolyte, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector; the positive current collector includes a positive electrode coating area and a positive electrode ear connected to the positive electrode coating area, the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode ear is not coated with a positive electrode active material layer. Taking a lithium-ion battery cell as an example, the material of the positive current collector can be aluminum, and the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with a negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0048] The battery cells described in the embodiments of the present application are suitable for batteries and electrical devices using batteries. Electrical devices may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0049] Below, the embodiments of the present application are described in detail.

[0050] At present, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0051] During the battery production process, the pole tabs and adapters need to be welded. The welding can be done by using ultrasonic waves to drive the high-frequency vibration of the welding press to weld the pole tabs.

[0052] The tabs have edges with nearly inclined cross-sections on both sides of the welding press. During the welding process, the pressure head only contacts the plane of the tab away from the adapter during high-frequency vibration, and cannot contact the inclined edges on both sides of the plane. Only the smaller areas at both ends of the pressure plate of the welding press contact the edge of the tab, which results in a smaller contact area between the edge of the tab and the welding press, generating greater pressure, causing the tab to easily suffer stress damage in the edge area, and in severe cases, the tab is prone to cracking.

[0053] Therefore, how to reduce the possibility of stress damage in the edge area of ​​the tab to improve the quality of the tab after welding is an important issue in battery production and processing.

[0054] In view of this, the present application provides a technical solution, in which a second pressure head smaller than the first pressure head is provided at both ends of the pressure plate of the welding press. The second pressure head contacts the edge of the pole lug to increase the contact area between the welding press and the edge of the pole lug, thereby reducing the pressure on the edge of the pole lug, thereby reducing the stress damage phenomenon that the pole lug is prone to in the edge area, thereby improving the quality of the pole lug after welding.

[0055] The following is combined with Figure 1-8 The welding press provided in this embodiment is introduced.

[0056] Combined with Figure 1-3 As shown, the present embodiment provides a welding press 100, including a pressing plate 10, a first pressing head 20 and a second pressing head 30, the pressing plate 10 includes a first surface 11 and a second surface 12 opposite to each other; a plurality of first pressing heads 20 are arranged at intervals on the first surface 11; a plurality of second pressing heads 30 are arranged at intervals on the first surface 11, and are located on at least one side of the plurality of first pressing heads 20 along a first direction X, the maximum dimension of the second pressing head 30 along the second direction Y is smaller than the maximum dimension of the first pressing head 20 along the second direction Y, the first direction X is parallel to the first surface 11, and the second direction Y is the arrangement direction from the first surface 11 to the second surface 12.

[0057] The pressing plate 10 may be a plate-shaped piece or a block-shaped piece, and its cross-sectional shape may be a rectangle or a polygon, which are not listed one by one in this embodiment. The pressing plate 10 may be made of a material with a certain structural strength, such as metal or ceramic.

[0058] The pressing plate 10 has a first surface 11 and a second surface 12 facing each other. The first surface 11 can be the upper surface in the figure in the welding press 100, and the second surface 12 can be the lower surface in the figure. However, when the welding press 100 is actually used, the first surface 11 can be the lower surface and the second surface 12 can be the upper surface.

[0059] The material of the first pressing head 20 and the second pressing head 30 is the same as that of the pressing plate 10. The first pressing head 20 and the second pressing head 30 can be fixedly connected to the pressing plate 10 by welding or bonding, or can be integrally formed with the pressing plate 10 by a mold.

[0060] The plurality of second pressing heads 30 are arranged at intervals at at least one end of the first surface 11 along the first direction X, which can be understood to include a variety of situations, for example, the second pressing heads 30 are arranged at both ends of the first surface 11 in the first direction X, and the number of the second pressing heads 30 at each end can be multiple. For another example, the first surface 11 is only provided with a second pressing head 30 at one end in the first direction X, in which case the number of the second pressing heads 30 is multiple.

[0061] Combined with Figure 4 As shown, during welding, the pole tab 200 is placed on the adapter plate 300, the adapter plate 300 is installed on the welding seat 400, and the welding press 100 presses the pole tab 200. The first pressing head 20 of the welding press 100 is against the upper surface of the pole tab 200, and the second pressing head 30 is against the inclined edges on both sides of the upper surface of the pole tab 200. The contact area between the welding press 100 and the edge of the pole tab 200 can be increased, and the compressive stress of the welding press 100 on the edge of the pole tab 200 can be reduced, thereby reducing the risk of stress damage in the edge area of ​​the pole tab 200 and improving the quality of the pole tab 200 after welding.

[0062] In some examples, optionally, a maximum dimension of the second pressing head 30 along the first direction X is smaller than a maximum dimension of the first pressing head 20 along the first direction X.

[0063] In some examples, optionally, the first direction X can be understood as the length direction of the pressure plate 10 shown in the figure. When the first pressure head 20 and the second pressure head 30 are circular in cross-section parallel to the first surface 11, the maximum size of the first pressure head 20 and the second pressure head 30 along the first direction X is the diameter of the two. When the first pressure head 20 and the second pressure head 30 are rectangular or polygonal in cross-section parallel to the first surface 11, the maximum size of the first pressure head 20 and the second pressure head 30 along the first direction X is one of the length and width of the two.

[0064] Since the space at both ends of the first surface 11 between the plurality of first pressing heads 20 along the first direction X is small, the maximum size of the second pressing head 30 in the first direction X is designed to be small, which meets the requirement of setting the second pressing head 30 at the edge of the first surface 11 and saves consumables.

[0065] In some examples, optionally, a maximum dimension of the second press head 30 along the third direction Z is smaller than a maximum dimension of the first press head 20 along the third direction Z, and the third direction Z is parallel to the first surface 11 and intersects with the first direction X.

[0066] In some examples, optionally, the third direction Z can be understood as the width direction of the pressure plate 10 shown in the figure. When the first pressure head 20 and the second pressure head 30 are circular in cross-section parallel to the first surface 11, the maximum size of the first pressure head 20 and the second pressure head 30 along the third direction Z is also the diameter of the two. When the first pressure head 20 and the second pressure head 30 are rectangular or polygonal in cross-section parallel to the first surface 11, the maximum size of the first pressure head 20 and the second pressure head 30 along the third direction Z is the other of the length and width of the two.

[0067] This structure enables the maximum size of the second pressing head 30 in the intersecting first direction X and second direction Y to be smaller than that of the first pressing head 20 , thereby meeting the requirement of arranging the second pressing head 30 at the edge of the first surface 11 and saving consumables.

[0068] In some examples, optionally, the first direction X of the present embodiment may be perpendicular to the third direction Z, and the second direction Y may be perpendicular to the first direction X and the third direction Z, respectively.

[0069] In some examples, optionally, the outer surface of the first pressing head 20 includes a first spherical surface 21 , and the outer surface of the second pressing head 30 includes a second spherical surface 22 .

[0070] It can be understood that the "spherical surface" in the first spherical surface 21 and the second spherical surface 22 described in this embodiment should be understood in a broad sense, and does not necessarily refer to the spherical surface of the entire sphere, but can also refer to the partial spherical surface of a partial sphere, such as the hemispherical surface of a hemisphere.

[0071] The curved surface characteristics of the first spherical surface 21 and the second spherical surface 22 can improve the uniformity of the pressure head welding, reduce damage, and adapt to welding tabs 200 of different shapes, which helps to improve the welding quality and efficiency.

[0072] In some examples, optionally, the ratio of the radius of the second spherical surface 22 to the radius of the first spherical surface 21 is 0.2-0.4.

[0073] For example, the radius of the second spherical surface 22 is 0.2 times, 0.25 times, 0.3 times, 0.35 times, and 0.4 times the radius of the first spherical surface 21 .

[0074] The ratio of the radius of the second spherical surface 22 to the radius of the first spherical surface 21 is designed to be 0.2-0.4, which not only facilitates the arrangement of the second press head 30 at the edge of the first surface 11 and reduces consumables, but also enables the second press head 30 to better adapt to the edge of the nearly inclined tab 200.

[0075] Combined with Figure 1 As shown, in some examples, optionally, the radius R of the first spherical surface 21 may be in the range of 0.01 cm to 2 cm. Accordingly, according to the above ratio design, the radius r of the second spherical surface 22 of the present embodiment may be in the range of 0.002 cm to 0.8 cm.

[0076] In some examples, optionally, along the first direction X, the first press head 20 has multiple columns, each column includes a plurality of first press heads 20 arranged at intervals along a third direction Z, and the third direction Z is parallel to the first surface 11 and intersects with the first direction X.

[0077] The first pressing head 20 is designed with multiple rows, which can increase the contact area with the pole tab 200, provide better support for the pole tab 200 during welding, and evenly distribute the pressure of the pressing plate 10, thereby improving the welding quality and stability.

[0078] In some examples, optionally, multiple first pressure heads 20 in two adjacent columns are arranged in the first direction X so that multiple rows of first pressure heads 20 are formed along the third direction Z. For example, the figure shows 7 columns of first pressure heads 20 along the first direction X and 3 rows of second pressure heads 30 along the third direction Z.

[0079] In some examples, optionally, along the first direction X, the plurality of second pressure heads 30 located at one end of the first surface 11 have at least one column, each column of second pressure heads 30 includes a plurality of second pressure heads 30 arranged at intervals along a third direction Z, and the number of second pressure heads 30 in each column is greater than the number of first pressure heads 20 in each column.

[0080] When the second pressing heads 30 are disposed at both ends of the first surface 11 in the first direction X, the second pressing heads 30 located at one end of the first surface 11 in the first direction X may be one row as shown in the figure, or may be multiple rows (this embodiment is not shown in the figure). The number of the second pressing heads 30 in each row is greater than the number of the first pressing heads 20 in each row, for example, the number of the second pressing heads 30 in one row in the figure is 5, and the number of the first pressing heads 20 in one row is 3.

[0081] The number of the second pressing heads 30 in a row is designed to be greater than the number of the first pressing heads 20 in a row, thereby further increasing the contact area of ​​the edge of the welding press 100 at the edge of the pole tab 200 and further improving the quality of the pole tab 200 after welding.

[0082] Combined with Figure 5-7As shown, in some examples, optionally, the welding press 100 also includes a third pressing head 40, and a plurality of third pressing heads 40 are spaced apart at at least one end of the first surface 11 along a third direction Z, the third direction Z is parallel to the first surface 11, and intersects with the first direction X, and the maximum dimension of the third pressing head 40 along the second direction Y is smaller than the maximum dimension of the first pressing head 20 along the second direction Y.

[0083] The third pressing head 40 is similar in structure and principle to the aforementioned second pressing head 30 . The third pressing head 40 is located on at least one side of the first pressing head 20 in the third direction Z. For example, the third pressing head 40 is provided on both sides of the first pressing head 20 in the third direction Z.

[0084] By abutting the edge of the pole tab 200 with the third pressing head 40, the contact area between the welding press 100 and the edge of the pole tab 200 is further increased, and the compressive stress of the welding press 100 on the edge of the pole tab 200 is reduced, thereby reducing the risk of stress damage in the edge area of ​​the pole tab 200 and improving the quality of the pole tab 200 after welding.

[0085] In some examples, optionally, a maximum dimension of the third pressing head 40 along the first direction X is smaller than a maximum dimension of the first pressing head 20 along the first direction X.

[0086] Since the space on both sides of the first surface 11 between the plurality of first pressing heads 20 along the third direction Z is small, the maximum dimension of the third pressing head 40 in the first direction X is designed to be small, which meets the requirement of setting the third pressing head 40 at the edge of the first surface 11 and saves consumables.

[0087] In some examples, optionally, a maximum dimension of the third pressing head 40 along the third direction Z is smaller than a maximum dimension of the first pressing head 20 along the third direction Z.

[0088] Similarly, by designing the maximum dimension of the third pressing head 40 in the third direction Z to be smaller, the requirement of arranging the third pressing head 40 at the edge of the first surface 11 is met, and consumables are saved.

[0089] In some examples, optionally, the outer surface of the first press head 20 includes a first spherical surface 21 , and the outer surface of the third press head 40 includes a third spherical surface 23 .

[0090] The first spherical surface 21 and the third spherical surface 23 can both be partial spherical structures, such as hemispherical surfaces. The first spherical surface 21 and the third spherical surface 23 can improve the uniformity of the pressure head welding, reduce damage, and adapt to welding tabs 200 of different shapes, which helps to improve welding quality and efficiency.

[0091] In some examples, optionally, the ratio of the radius of the third spherical surface 23 to the radius of the first spherical surface 21 is 0.2-0.4.

[0092] The radius of the third spherical surface 23 may be equal to the radius of the second spherical surface 22, and the range thereof may be 0.002 cm-0.8 cm.

[0093] By designing the ratio of the radius of the third spherical surface 23 to the radius of the first spherical surface 21 to be 0.2-0.4, it is not only convenient to set the third press head 40 at the edge of the first surface 11 to reduce consumables, but also the third press head 40 can be better adapted to the edge of the tab 200.

[0094] Combined with the attachment again Figure 1 and attached Figure 2 As shown, in some examples, optionally, the first surface 11 includes a main body 111 and a first chamfered portion 112 located at both ends of the main body 111 along the first direction X, and the first pressure head 20 and the second pressure head 30 are arranged on the main body 111. In the direction away from the main body 111 in the first direction X, the distance between the first chamfered portion 112 and the second surface 12 in the second direction Y gradually decreases.

[0095] The first chamfered portion 112 forms inclined surfaces or curved surfaces at both ends of the first surface 11 in the first direction X. Figure 4 As shown, the inclined surface or the curved surface can better match the inclined edge, thereby further increasing the contact area between the welding press 100 and the tab 200 and improving the welding quality of the tab 200.

[0096] Combined with Figure 1 and attached Figure 3 As shown, in some examples, optionally, the first surface 11 also includes second chamfered portions 113 located at both ends of the main body 111 along the third direction Z, and each second chamfered portion 113 is connected to two first chamfered portions 112. In the direction away from the main body 111 along the third direction Z, the distance between the second chamfered portion 113 and the second surface 12 in the third direction Z gradually decreases, and the third direction Z is parallel to the first surface 11 and intersects with the first direction X.

[0097] Each second chamfered portion 113 can intersect or connect with the two first chamfered portions 112. Similarly, each first chamfered portion 112 can intersect or connect with the two second chamfered portions 113. The second chamfered portions 113 enable the first surface 11 to form inclined surfaces or curved surfaces on both sides in the third direction Z.

[0098] By configuring the second chamfered portion 113 , it is possible to better match the inclined edge of the tab 200 during welding, thereby further increasing the contact area between the welding press 100 and the tab 200 and improving the welding quality of the tab 200 .

[0099] Combined with the attachment again Figure 1As shown, in some examples, optionally, the pressure plate 10 includes a side surface 13 located between the first surface 11 and the second surface 12. When the pressure plate 10 is in the shape of a rectangular plate, the number of the side surfaces 13 may be four, and the four side surfaces 13 are all perpendicular to the first surface 11 and the second surface 12, and a rounded corner 14 is provided at the connection between the two intersecting side surfaces 13.

[0100] The setting of the rounded corner 14 can eliminate the right angles or sharp edges at the diagonal of the pressure plate 10, but instead produce a smooth transition of an arc. At the same time, the rounded corner 14 can smoothly transition with the intersection of the first chamfered portion 112 and the second chamfered portion 113 mentioned above, further reducing the possibility of damaging the pole ear 200 during welding of the pressure plate 10.

[0101] Combined with Figure 8 As shown, based on the above-mentioned welding press 100, an embodiment of the present application provides a welding device, which includes a welding press 100 as any one of the above-mentioned technical solutions.

[0102] In some examples, optionally, an embodiment of the present application provides a welding device, including a moving component 500, an ultrasonic component, and a welding press 100 as described in the above technical solution, wherein the moving component 500 is connected to the welding press 100 and is used to drive the welding press 100 to move, and the ultrasonic component is connected to the moving component 500 and is used to drive the welding press 100 to vibrate.

[0103] In some examples, optionally, the moving assembly 500 may include a robot arm, and the welding device may further include a frame 700 , and the robot arm is connected to the frame 700 .

[0104] In some examples, optionally, along the third direction Z, a distance between two adjacent second pressure heads 30 in each column is less than or equal to a distance between two adjacent first pressure heads 20 in each column.

[0105] For example, in the third direction Z, the ratio of the spacing between a row of second pressure heads 30 arranged at intervals to the spacing between a row of first pressure heads 20 arranged at intervals can range from (1:3) to (1:1), such as (1:1), (1:1.2), (1:1.5), (1:2) and (1:3).

[0106] The smaller the distance between two adjacent second pressing heads 30 in a row in the third direction Z, the more second pressing heads 30 can be arranged, thereby increasing the contact area with the side edge of the electrode tab 200 .

[0107] Finally, please see the attached Figure 1-8As shown, this embodiment provides a welding press 100, including a pressing plate 10, a first pressing head 20 and a second pressing head 30, the pressing plate 10 includes a first surface 11 and a second surface 12 opposite to each other; a plurality of first pressing heads 20 are arranged at intervals on the first surface 11; a plurality of second pressing heads 30 are arranged at intervals on the first surface 11 and are located on at least one side of the plurality of first pressing heads 20 along the first direction X, the maximum dimension of the second pressing head 30 along the second direction Y is smaller than the maximum dimension of the first pressing head 20 along the second direction Y, the first direction X is parallel to the first surface 11, and the second direction Y is the arrangement direction from the first surface 11 to the second surface 12. The maximum dimension of the second pressing head 30 along the first direction X is smaller than the maximum dimension of the first pressing head 20 along the first direction X. The maximum dimension of the second pressing head 30 along the third direction Z is smaller than the maximum dimension of the first pressing head 20 along the third direction Z, the third direction Z is parallel to the first surface 11 and intersects with the first direction X. The outer surface of the first pressing head 20 includes a first spherical surface 21, and the outer surface of the second pressing head 30 includes a second spherical surface 22. The ratio of the radius of the second spherical surface 22 to the radius of the first spherical surface 21 is 0.2-0.4. Along the first direction X, the first press head 20 has multiple columns, each column includes multiple first press heads 20 arranged at intervals along the third direction Z, the third direction Z is parallel to the first surface 11 and intersects with the first direction X. Along the first direction X, the multiple second press heads 30 located at one end of the first surface 11 have at least one column, each column of the second press heads 30 includes multiple second press heads 30 arranged at intervals along the third direction Z, and the number of the second press heads 30 in each column is greater than the number of the first press heads 20 in each column. The welding press 100 also includes a third press head 40, multiple third press heads 40 are arranged at intervals at at least one end of the first surface 11 along the third direction Z, the third direction Z is parallel to the first surface 11 and intersects with the first direction X, and the maximum dimension of the third press head 40 along the second direction Y is smaller than the maximum dimension of the first press head 20 along the second direction Y. The maximum dimension of the third press head 40 along the first direction X is smaller than the maximum dimension of the first press head 20 along the first direction X. The maximum dimension of the third press head 40 along the third direction Z is smaller than the maximum dimension of the first press head 20 along the third direction Z. The outer surface of the first press head 20 includes a first spherical surface 21, and the outer surface of the third press head 40 includes a third spherical surface 23. The ratio of the radius of the third spherical surface 23 to the radius of the first spherical surface 21 is 0.2-0.4. The first surface 11 includes a main body 111 and first chamfered portions 112 located at both ends of the main body 111 along the first direction X. The first press head 20 and the second press head 30 are arranged on the main body 111. In the direction away from the main body 111 in the first direction X, the distance between the first chamfered portion 112 and the second surface 12 in the second direction Y gradually decreases.The first surface 11 also includes second chamfered portions 113 located at both ends of the main body 111 along the third direction Z. Each second chamfered portion 113 is connected to two first chamfered portions 112. In the direction away from the main body 111 along the third direction Z, the distance between the second chamfered portion 113 and the second surface 12 in the third direction Z gradually decreases. The third direction Z is parallel to the first surface 11 and intersects with the first direction X.

[0108] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A welding press, characterized in that: include: A pressing plate including a first surface and a second surface opposite to each other; A first pressing head, a plurality of the first pressing heads are arranged on the first surface at intervals; as well as A second pressure head, a plurality of the second pressure heads are arranged at intervals on the first surface and are located on at least one side of the plurality of the first pressure heads along the first direction, a maximum dimension of the second pressure head along the second direction is smaller than a maximum dimension of the first pressure head along the second direction, the first direction is parallel to the first surface, and the second direction is an arrangement direction from the first surface to the second surface.

2. The welding press according to claim 1, characterized in that: A maximum dimension of the second pressure head along the first direction is smaller than a maximum dimension of the first pressure head along the first direction.

3. The welding press according to claim 2, characterized in that: A maximum dimension of the second pressing head along a third direction is smaller than a maximum dimension of the first pressing head along the third direction, and the third direction is parallel to the first surface and intersects with the first direction.

4. The welding press according to claim 3, characterized in that: The outer surface of the first pressure head includes a first spherical surface, and the outer surface of the second pressure head includes a second spherical surface.

5. The welding press according to claim 4, characterized in that: The ratio of the radius of the second spherical surface to the radius of the first spherical surface is 0.2-0.

4.

6. The welding press according to claim 1, characterized in that: The first pressing heads have a plurality of columns along the first direction, and each column of the first pressing heads includes a plurality of the first pressing heads arranged at intervals along a third direction, wherein the third direction is parallel to the first surface and intersects with the first direction.

7. The welding press according to claim 6, characterized in that: Along the first direction, the plurality of second pressure heads located at one end of the first surface have at least one column, each column of the second pressure heads includes a plurality of second pressure heads arranged at intervals along the third direction, and the number of the second pressure heads in each column is greater than the number of the first pressure heads in each column.

8. The welding press according to any one of claims 1 to 7, characterized in that: The welding press also includes a third pressing head, and a plurality of the third pressing heads are spaced apart at at least one end of the first surface along a third direction. The third direction is parallel to the first surface and intersects with the first direction. The maximum dimension of the third pressing head along the second direction is smaller than the maximum dimension of the first pressing head along the second direction.

9. The welding press according to claim 8, characterized in that: A maximum dimension of the third pressure head along the first direction is smaller than a maximum dimension of the first pressure head along the first direction.

10. The welding press according to claim 9, characterized in that: A maximum dimension of the third pressure head along the third direction is smaller than a maximum dimension of the first pressure head along the third direction.

11. The welding press according to claim 10, characterized in that: The outer surface of the first pressure head includes a first spherical surface, and the outer surface of the third pressure head includes a third spherical surface.

12. The welding press according to claim 11, characterized in that: The ratio of the radius of the third spherical surface to the radius of the first spherical surface is 0.2-0.

4.

13. The welding press according to any one of claims 1 to 7, characterized in that: The first surface includes a main body and first chamfered portions located at both ends of the main body along the first direction. The first pressure head and the second pressure head are arranged on the main body. In the direction away from the main body in the first direction, the distance between the first chamfered portion and the second surface in the second direction gradually decreases.

14. The welding press according to claim 13, characterized in that The first surface also includes second chamfered portions located at both ends of the main body along the third direction, each of the second chamfered portions is connected to two of the first chamfered portions, and in the direction away from the main body along the third direction, the distance between the second chamfered portion and the second surface in the third direction gradually decreases, and the third direction is parallel to the first surface and intersects with the first direction.

15. A welding device, characterized in that: Comprising a welding press as described in any one of claims 1-14.

16. The welding device according to claim 15, characterized in that The welding device also includes a moving component and an ultrasonic component. The moving component is connected to the welding press and is used to drive the welding press to move. The ultrasonic component is connected to the moving component and is used to drive the welding press to vibrate.

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