Welding structure, battery and welding equipment

Abstract

The utility model relates to a welding structure, a battery and welding equipment. The welding structure comprises a first welding piece, a second welding piece and a welding pool part for connecting the first welding piece and the second welding piece, an exhaust channel is formed between the first welding piece and the second welding piece, and the exhaust channel is used for gas overflow of a welding pool part in the welding process. According to the welding structure, the exhaust channel is formed between the first welding piece and the second welding piece, so that gas generated by the welding pool part in the welding process can overflow through the exhaust channel, and the welding quality of the welding pool part is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of welding, and in particular, to a welding structure, a battery and a welding device. Background Art

[0002] In the related art, when two welded parts (e.g., aluminum, aluminum alloy, etc.) are laser welded, an oxide film is easily formed on the surface of aluminum or magnesium, which easily absorbs water vapor, and water decomposes into hydrogen during welding. However, the solubility of hydrogen in solid aluminum and magnesium is extremely low, so pores are easily generated during the solidification stage of the welding pool, thus affecting the welding quality. Utility Model Content

[0003] The purpose of the present disclosure is to provide a welding structure, a battery and a welding device. The welding structure forms an exhaust channel between a first welding part and a second welding part, so that the gas generated in the welding pool during the welding process can overflow through the exhaust channel to improve the welding quality of the welding pool.

[0004] In order to achieve the above-mentioned object, the present disclosure provides a welding structure in a first aspect, including a first welding part, a second welding part, and a welding pool portion connecting the first welding part and the second welding part;

[0005] Wherein, an exhaust passage is formed between the first welding part and the second welding part, and the exhaust passage is used for gas from the welding molten pool to escape during welding.

[0006] Optionally, the welding pool portion is located in the middle of the first welding part and the second welding part, and the exhaust channels are respectively formed on both sides of the welding pool portion.

[0007] Optionally, the first welding part and the second welding part are arranged at intervals, and a gap between the first welding part and the second welding part forms the exhaust passage.

[0008] Optionally, a gap between the first welding part and the second welding part is 0.05-0.3 mm.

[0009] Optionally, the first welding member includes a first body and a first protrusion located on a side of the first body facing the second welding member, and the first protrusion is supported by the first body and the second welding member to form the exhaust passage; and / or

[0010] The second welding member includes a second body and a second protrusion located on a side of the second body facing the first welding member, and the second protrusion is supported by the second body and the first welding member to form the exhaust passage.

[0011] Optionally, the side surface of the first protrusion away from the first body and / or the side surface of the second protrusion away from the second body are configured as arc-shaped surfaces.

[0012] Optionally, there are multiple first protrusions and / or second protrusions, and they are arranged at intervals on both sides of the welding pool portion along the extension direction of the welding pool portion.

[0013] Optionally, the first welding part and the second welding part are made of aluminum or aluminum alloy.

[0014] In a second aspect of the present disclosure, a battery is provided, the battery comprising the above-mentioned welding structure;

[0015] One of the first welding piece and the second welding piece is a pole of the battery, and the other is a battery connecting piece.

[0016] In a third aspect of the present disclosure, a welding device is further provided, which is used for welding a structure, wherein the welding structure comprises a first welding part and a second welding part, including:

[0017] a supporting mechanism, comprising a first supporting member for supporting the first welding member and a second supporting member for supporting the second welding member, so as to form an exhaust passage between the first welding member and the second welding member; and

[0018] The welding device is located at a side of the supporting mechanism away from the welding structure, and is used for emitting a laser beam to form a welding pool portion for welding the first welding part and the second welding part.

[0019] Through the above technical scheme, the welding structure disclosed in the present invention includes a first welding part and a second welding part, and the first welding part and the second welding part are connected through a welding molten pool portion, wherein an exhaust channel is formed between the first welding part and the second welding part. When the first welding part and the second welding part are laser welded, the gas generated by the welding molten pool portion during the welding process can overflow through the exhaust channel, thereby avoiding the gas from remaining inside the welding molten pool portion during the solidification stage, thereby improving the welding quality of the welding molten pool portion.

[0020] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0022] Figure 1 It is a structural schematic diagram of a welding structure provided in some embodiments of the present disclosure.

[0023] Figure 2 It is a structural schematic diagram of a welding structure provided in some embodiments of the present disclosure, wherein the first welding part includes a first protrusion.

[0024] Figure 3 It is a structural schematic diagram of a welding structure provided in some embodiments of the present disclosure, wherein the second welding part includes a second protrusion.

[0025] Figure 4 It is a structural schematic diagram of a welding structure provided in some embodiments of the present disclosure, wherein the first welding part includes a first protrusion and the second welding part includes a second protrusion.

[0026] Figure 5 It is a schematic diagram of the structure of the battery provided in some embodiments of the present disclosure.

[0027] Figure 6 It is a schematic diagram of the structure of the welding equipment provided in some embodiments of the present disclosure, in which the welding structure is shown.

[0028] Description of Reference Numerals

[0029] 10-battery; 11-cell; 12-housing; 13-support column;

[0030] 100-welding structure; 101-exhaust channel; 110-first welding part; 111-first body; 112-first protrusion; 120-second welding part; 121-second body; 122-second protrusion; 130-welding pool;

[0031] 20-welding equipment; 21-support mechanism; 21a-first support member; 21b-second support member; 22-welding device; 22a-laser beam; DETAILED DESCRIPTION

[0032] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0033] In the present disclosure, unless otherwise specified, directional words such as "up, down, left, right" generally refer to up, down, left, right relative to the accompanying drawings; "inside and outside" refer to the inside and outside of the outline of the corresponding component; "far and near" refer to the corresponding structure or the corresponding component being far away from or close to another structure or component. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another and do not have order and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be construed as limitations on the present disclosure.

[0034] The purpose of the present disclosure is to provide a welding structure 100, a battery 10 and a welding device 20. The welding structure 100 forms an exhaust channel 101 between a first welding part 110 and a second welding part 120, so that the gas generated by the welding pool part 130 during the welding process can overflow through the exhaust channel 101 to improve the welding quality of the welding pool part 130.

[0035] In order to achieve the above purpose, Figures 1 to 4 As shown, an embodiment of the present disclosure provides a welding structure 100, which includes a first welding part 110, a second welding part 120, and a welding pool portion 130 connecting the first welding part 110 and the second welding part 120; wherein an exhaust channel 101 is formed between the first welding part 110 and the second welding part 120, and the exhaust channel 101 is used for the gas overflow of the welding pool portion 130 during welding.

[0036] Through the above technical scheme, the welding structure 100 disclosed in the present invention includes a first welding part 110 and a second welding part 120, and the first welding part 110 and the second welding part 120 are connected through a welding molten pool portion 130, wherein an exhaust channel 101 is formed between the first welding part 110 and the second welding part 120. When the first welding part 110 and the second welding part 120 are laser welded, the gas generated by the welding molten pool portion 130 during the welding process can overflow through the exhaust channel 101, thereby avoiding the gas from remaining inside the welding molten pool portion 130 during the solidification stage, so as to improve the welding quality of the welding molten pool portion 130.

[0037] It should be noted that the exhaust channel 101 between the first welding part 110 and the second welding part 120 can be one or more, as long as the gas in the welding molten pool part 130 can be smoothly discharged during the welding process. For example, at least one exhaust channel 101 can be formed on the opposite sides of the welding molten pool part 130, so that the gas in the welding molten pool part 130 can be discharged from the exhaust channels 101 on both sides, thereby improving the exhaust efficiency and avoiding the retention of gas in the welding molten pool part 130.

[0038] Optionally, the first welding member 110 and the second welding member 120 may be made of aluminum or aluminum alloy. For example, the first welding member 110 is an aluminum plate, and the second welding member 120 is also an aluminum plate. In some actual products, one of the first welding member 110 and the second welding member 120 may be a pole of the battery 10, and the other may be a battery connecting plate connecting multiple battery cells. It should be noted that the first welding member 110 and the second welding member 120 may also be other materials that are easy to form an oxide film on the surface, such as magnesium or magnesium alloy, zinc, zinc alloy, nickel, titanium, chromium, copper, etc.

[0039] like Figure 1 As shown, in some embodiments, the welding pool portion 130 is located in the middle of the first welding part 110 and the second welding part 120 , and exhaust channels 101 are respectively formed on both sides of the welding pool portion 130 .

[0040] The first welding part 110 and the second welding part 120 are arranged at intervals in the up and down directions, and the centers of the first welding part 110 and the second welding part 120 in the left and right directions are aligned, and the welding pool part 130 is located in the middle of the first welding part 110 and the second welding part 120 in the left and right directions.

[0041] It is understandable that the exhaust passage 101 may be of any suitable shape, such as Figures 1 to 4 As shown, the first welding member 110 and the second welding member 120 are arranged at intervals, and the gap between the first welding member 110 and the second welding member 120 forms an exhaust channel 101. In the left and right directions of the welding molten pool portion 130, there is a gap between the first welding member 110 and the second welding member 120, and the gap forms an exhaust channel 101 for exhausting the gas generated in the welding molten pool portion 130 during the welding process.

[0042] It should be noted that the exhaust passage 101 may also be a plurality of tubular passages between the first welding member 110 and the second welding member 120 and connected to the welding molten pool portion 130 , so as to exhaust the gas from the welding molten pool portion 130 .

[0043] Considering the welding quality of the first welding part 110 and the second welding part 120 and the spatial arrangement of the first welding part 110 and the second welding part 120, in some embodiments, the gap between the first welding part 110 and the second welding part 120 is 0.05-0.3 mm. For example, the gap height between the first welding part 110 and the second welding part 120 (e.g. Figure 1 The distance between the first welding part 110 and the second welding part 120 in the vertical direction is greater than or equal to 0.05mm to ensure that the gas can be discharged smoothly; the gap height between the first welding part 110 and the second welding part 120 is less than or equal to 0.3mm to avoid the gap between the two being too large and affecting the welding quality. The gap height between the first welding part 110 and the second welding part 120 can also be 0.1mm, 0.15mm, 0.2mm, etc.

[0044] The exhaust passage 101 between the first welding member 110 and the second welding member 120 may also be formed by other methods, such as Figure 2As shown, in some embodiments, the first welding member 110 includes a first body 111 and a first protrusion 112 located on the side of the first body 111 facing the second welding member 120, and the first protrusion 112 is supported by the first body 111 and the second welding member 120 to form an exhaust passage 101; wherein the first welding member 110 includes a first body 111 for welding connection with the second welding member 120, and the first protrusion 112 is formed on the side of the first body 111 facing the second welding member 120, and when the first welding member 110 and the second welding member 120 are placed together for welding, a gap is formed between the first body 111 of the first welding member 110 and the second welding member 120, and the gap forms the exhaust passage 101. It should be noted that at least one first protrusion 112 can be formed on opposite sides of the welding molten pool portion 130, so that gaps are formed on opposite sides of the welding molten pool portion 130 to exhaust gas.

[0045] like Figure 3 As shown, in other embodiments, the second welding member 120 includes a second body 121 and a second protrusion 122 located on the side of the second body 121 facing the first welding member 110, and the second protrusion 122 is supported by the second body 121 and the first welding member 110 to form the exhaust channel 101. The second welding member 120 includes a second body 121 for welding with the first welding member 110 (for example, the first body 111), and the second protrusion 122 is formed on the side of the second body 121 facing the first welding member 110. When the first welding member 110 and the second welding member 120 are placed together for welding, a gap is formed between the first body 111 of the first welding member 110 and the second welding member 120, and the gap can also form the exhaust channel 101. It should be noted that at least one second protrusion 122 can be formed on the opposite sides of the welding pool portion 130, so that gaps are formed on the opposite sides of the welding pool portion 130 to exhaust gas.

[0046] like Figure 4 As shown, in some other embodiments, the first welding member 110 includes a first body 111 and a first protrusion 112 located on the side of the first body 111 facing the second welding member 120; the second welding member 120 includes a second body 121 and a second protrusion 122 located on the side of the second body 121 facing the first welding member 110, and the first protrusion 112 and the second protrusion 122 are supported between the first body 111 and the second body 121 to form an exhaust channel 101 between the first body 111 and the second body 121 for exhausting gas. It should be noted that the shape and size of the first protrusion 112 and the second protrusion 122 can be the same, and they are staggered between the first body 111 and the second body 121.

[0047] The first protrusion 112 and the second protrusion 122 may be in any suitable shape, such as Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the side of the first protrusion 112 away from the first body 111 and / or the side of the second protrusion 122 away from the second body 121 is configured as an arc surface. For example, the first protrusion 112 and the second protrusion 122 can be hemispherical or spherical, and can be integrally formed on the surface of the first body 111 and the second body 121, or formed by mechanical processing, or can be provided on the side of the first body 111 and the second body 121 in the form of welding or bonding. It is understandable that the first protrusion 112 and the second protrusion 122 can also be configured as, for example, a cylindrical, triangular, rectangular, or other polygonal structure, which will not be described in detail here.

[0048] In some embodiments, the number of the first protrusion 112 and / or the second protrusion 122 is multiple, and they are arranged at intervals on both sides of the welding pool portion 130 along the extension direction of the welding pool portion 130. For example, when the welding pool is a strip-shaped welding structure 100 extending in a certain direction, the first protrusion 112 can be multiple, and the multiple first protrusions 112 are arranged at intervals along the extension direction of the welding pool portion 130. The second protrusion 122 can be multiple, and the multiple second protrusions 122 are arranged at intervals along the extension direction of the welding pool portion 130. When both the first protrusion 112 and the second protrusion 122 are included, both can be multiple, and the multiple first protrusions 112 and the multiple second protrusions 122 are arranged at intervals along the extension direction of the welding pool portion 130. Among them, the first protrusion 112, the second protrusion 122, or the first protrusion 112 and the second protrusion 122 can be respectively arranged on the opposite sides of the welding molten pool portion 130, that is, on the opposite sides perpendicular to the extension direction of the welding molten pool portion 130, so as to form a gap between the first welding part 110 and the second welding part 120, and the gap is the above-mentioned exhaust channel 101.

[0049] like Figure 5 As shown, an embodiment of the present disclosure provides a battery 10, which includes a battery cell 11, a housing 12 and the above-mentioned welding structure 100; wherein one of the first welding piece 110 and the second welding piece 120 is a pole of the battery 10, and the other is a battery connecting piece, which is used to connect poles of multiple batteries (battery cells or battery cells) together. Therefore, the battery 10 also has all the advantages of the above-mentioned welding structure 100.

[0050] Among them, the first welding member 110 and the second welding member 120 can both be made of aluminum, the first welding member 110 can be the negative electrode column of the battery 10 connected to the negative electrode of the battery cell 11, the second welding member 120 can be the battery connecting piece of the negative electrode column, and the negative electrode column and the battery connecting piece are welded and connected through the welding pool 130. In addition, the first welding member 110 and the second welding member 120 can both be made of copper, the first welding member 110 can be the positive electrode column of the battery 10 connected to the positive electrode of the battery cell 11, the second welding member 120 can be the battery connecting piece of the positive electrode column, and the positive electrode column and the battery connecting piece are welded and connected through the welding pool 130.

[0051] In some embodiments, in order to form an exhaust channel 101 between the first welding part 110 (pole) and the second welding part 120 (battery connecting piece) before they are welded, the first welding part 110 can be supported by the battery cell 11, and the second welding part 120 can be supported by a support column 13 arranged on the shell 12, so that a gap (i.e., the exhaust channel 101) is formed between the first welding part 110 and the second welding part 120, and the gas generated during the welding process can overflow from the exhaust channel 101 to ensure the welding quality.

[0052] like Figure 6 As shown, the embodiment of the present disclosure also provides a welding device 20, which is used for welding a structure 100, and the welding structure 100 includes a first welding part 110 and a second welding part 120. The welding device 20 is used to weld the first welding part 110 and the second welding part 120 through a welding molten pool portion 130. The welding device 20 includes a supporting mechanism 21 and a welding device 22. The supporting mechanism 21 includes a first supporting member 21a for supporting the first welding part 110 and a second supporting member 21b for supporting the second welding part 120, so as to form an exhaust passage 101 between the first welding part 110 and the second welding part 120. The welding device 22 is located on a side of the supporting mechanism 21 away from the welding structure 100, and is used to emit a laser beam 22a to form a welding molten pool portion 130 for welding the first welding part 110 and the second welding part 120. Among them, the welding device 22 can adopt a welding instrument known in the relevant technology, which will not be repeated here.

[0053] The support mechanism 21 includes a first support member 21a and a second support member 21b, wherein the first support member 21a is used to support the first welding member 110, and the second support member 21b is used to support the second welding member 120. Since the support heights of the first support member 21a and the second support member 21b are different, there is a gap between the first welding member 110 and the second welding member 120, namely, the exhaust passage 101. The welding device 22 is located on the side of the second support member 21b away from the support mechanism 21, and is used to emit a laser beam 22a to the first welding member 110 and the second welding member 120, so as to form a welding pool portion 130 between the first welding member 110 and the second welding member 120, so as to weld and connect the first welding member 110 and the second welding member 120.

[0054] In addition, the welding equipment 20 supports the first welding part 110 and the second welding part 120 through the first support member 21a and the second support member 21b of the support mechanism 21 to form an exhaust channel 101 therebetween, and welds the first welding part 110 and the second welding part 120 together through the welding device 22. Therefore, the welding equipment 20 and the welding structure 100 including the first welding part 110, the second welding part 120 and the welding molten pool part 130, and the battery 10 including the welding structure 100 belong to an inventive concept.

[0055] The welding structure 100 and the battery 10 disclosed in the present invention include a first welding part 110 and a second welding part 120, and the first welding part 110 and the second welding part 120 are connected by a welding molten pool part 130, wherein an exhaust passage 101 is formed between the first welding part 110 and the second welding part 120, and when the first welding part 110 and the second welding part 120 are laser welded, the gas generated by the welding molten pool part 130 during the welding process can overflow through the exhaust passage 101, so as to avoid the gas from being retained in the welding molten pool part 130 during the solidification stage, so as to improve the welding quality of the welding molten pool part 130. The welding device 20 is used to realize the welding between the first welding part 110 and the second welding part 120 of the welding structure 100.

[0056] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0057] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0058] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A welding structure, characterized in that: It includes a first welding piece, a second welding piece, and a welding pool portion connecting the first welding piece and the second welding piece; Wherein, an exhaust passage is formed between the first welding part and the second welding part, and the exhaust passage is used for gas from the welding molten pool to escape during welding.

2. The welding structure according to claim 1, characterized in that: The welding pool portion is located in the middle of the first welding part and the second welding part, and the exhaust channels are respectively formed on both sides of the welding pool portion.

3. The welding structure according to claim 1, characterized in that: The first welding member and the second welding member are arranged at an interval, and a gap between the first welding member and the second welding member forms the exhaust passage.

4. The welding structure according to claim 3, characterized in that: The gap between the first welding part and the second welding part is 0.05-0.3 mm.

5. The welding structure according to claim 1, characterized in that: The first welding piece includes a first body and a first protrusion located on a side of the first body facing the second welding piece, and the first protrusion is supported by the first body and the second welding piece to form the exhaust passage; and / or The second welding member includes a second body and a second protrusion located on a side of the second body facing the first welding member, and the second protrusion is supported by the second body and the first welding member to form the exhaust passage.

6. The welding structure according to claim 5, characterized in that: The side surface of the first protrusion away from the first body and / or the side surface of the second protrusion away from the second body are configured as arc-shaped surfaces.

7. The welding structure according to claim 5, characterized in that: The number of the first protrusions and / or the second protrusions is plural, and they are arranged at intervals on both sides of the welding pool portion along the extending direction of the welding pool portion.

8. The welding structure according to any one of claims 1 to 7, characterized in that: The first welding part and the second welding part are made of aluminum or aluminum alloy.

9. A battery, characterized in that: The battery comprises the welding structure according to any one of claims 1 to 8; One of the first welding piece and the second welding piece is a pole of the battery, and the other is a battery connecting piece.

10. A welding device for welding a structure, the welding structure comprising a first welding part and a second welding part, characterized in that: include: A supporting mechanism, comprising a first supporting member for supporting the first welding member and a second supporting member for supporting the second welding member, so as to form an exhaust passage between the first welding member and the second welding member; and The welding device is located at a side of the supporting mechanism away from the welding structure, and is used for emitting a laser beam to form a welding pool portion for welding the first welding part and the second welding part.

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