Lithium ion battery periphery welding fixing and shaping device and welding method

Abstract

The invention discloses a lithium ion battery periphery welding fixing and shaping device and a welding method.The lithium ion battery periphery welding fixing and shaping device comprises a bottom plate, and a base used for containing a lithium ion battery is installed on the bottom plate through a lifting piece; a first side clamping plate and a second side clamping plate which are used for clamping the lithium ion battery and are opposite to each other are mounted on the bottom plate; negative pressure holes are formed in the first side clamping plate and / or the second side clamping plate; when the periphery of the lithium ion battery is welded, the first side clamping plate and the second side clamping plate clamp the first side face and the second side face of the lithium ion battery, and the negative pressure hole applies outward suction force to the lithium ion battery. In the welding process of the lithium ion battery, negative pressure is applied to the interior of the negative pressure hole through negative pressure equipment, then the outward adsorption force on the shell of the lithium ion battery is achieved, the lithium ion battery is cooled, meanwhile, the side face of the lithium ion battery is prevented from being concaved inwards and deformed, and the welding effect is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery welding auxiliary devices, and in particular to a lithium ion battery peripheral welding fixing and shaping device and a welding method. Background Art

[0002] Lithium-ion batteries have developed rapidly in recent years, demanding ever-higher energy densities. To accommodate this, aluminum casings are becoming thinner. However, during the welding process, thin-walled casings experience elevated temperatures at the weld zone, leading to uneven local heating and varying degrees of shrinkage and internal stress. This can cause deformation in the weld zone, particularly in larger, thinner-walled casings. This deformation can have a significant impact on the battery's blue film application and module assembly. Summary of the Invention

[0003] In order to solve the technical problems existing in the background technology, the present invention provides a lithium-ion battery peripheral welding, fixing and shaping device and welding method.

[0004] The present invention provides a device for welding, fixing and shaping the periphery of a lithium-ion battery, comprising a base plate, on which a base for placing the lithium-ion battery is mounted via a lifting member;

[0005] The bottom plate is provided with a first side clamping plate and a second side clamping plate which are opposite to each other and are used for clamping the lithium-ion battery; a negative pressure hole is provided on the first side clamping plate and / or the second side clamping plate;

[0006] When welding the periphery of the lithium-ion battery, the first side clamping plate and the second side clamping plate clamp the first side surface and the second side surface of the lithium-ion battery, and the negative pressure hole applies an outward suction force to the lithium-ion battery.

[0007] During the welding process of lithium-ion batteries, negative pressure is applied to the negative pressure hole through the negative pressure equipment, thereby achieving outward adsorption force on the lithium-ion battery shell. While cooling the lithium-ion battery, it avoids the concave deformation of the side of the lithium-ion battery and ensures the welding effect.

[0008] As a further optimized solution of the present invention, negative pressure holes are provided on both the first side clamping plate and the second side clamping plate.

[0009] Further enhance the welding effect and cooling effect of lithium-ion batteries.

[0010] As a further optimized solution of the present invention, the first side clamping plate is fixed to the bottom plate, and a third side clamping plate is fixed to the first side clamping plate, and the third side clamping plate is used to limit the third side surface of the lithium-ion battery.

[0011] Further increase the stability of the fixation during welding of lithium-ion batteries.

[0012] As a further optimized solution of the present invention, a fourth side clamping plate opposite to the third side clamping plate is installed on the bottom plate through a first telescopic member, and the fourth side clamping plate is used to clamp the fourth side surface of the lithium-ion battery.

[0013] The first side clamping plate, the second side clamping plate, the third side clamping plate and the fourth side clamping plate are used to clamp the lithium-ion battery during welding, thereby preventing the lithium-ion battery from moving during welding and ensuring the welding effect.

[0014] As a further optimized solution of the present invention, the second side clamping plate is installed on the above-mentioned base plate through a second telescopic member, and the second telescopic member is used to adjust the distance between the first side clamping plate and the second side clamping plate.

[0015] The second telescopic member can be an electric cylinder, a pneumatic cylinder, etc. in the prior art, so as to facilitate adjustment of the distance between the first side clamping plate and the second side clamping plate.

[0016] As a further optimized solution of the present invention, a push plate is installed on the bottom plate through a third telescopic member. The push plate is in contact with the second side clamping plate and is used to drive the second side clamping plate to move toward the first side clamping plate and provide auxiliary support for the second side clamping plate.

[0017] Ensure that the second side clamping plate is pressed tightly against the lithium-ion battery during the processing.

[0018] As a further optimized solution of the present invention, at least two groups of the second telescopic members are provided, and at least two groups of the second telescopic members are located on the outside of the push plate.

[0019] This increases stability.

[0020] As a further optimized solution of the present invention, it further includes a lifting plate vertically slidably mounted on the bottom plate, the base is mounted on the lifting plate, and the lifting end of the lifting member is connected to the lifting plate;

[0021] An elastic member is provided between the lifting plate and the bottom plate.

[0022] The overall stability is further enhanced by the provision of the elastic member.

[0023] As a further optimized solution of the present invention, a sliding column is provided at the bottom of the lifting plate, a sliding hole matching the sliding column is opened on the bottom plate, the sliding column passes through the sliding hole and has a portion located below the bottom plate, an extension ring is provided at the bottom of the sliding column, and the elastic member is arranged between the bottom plate and the extension ring, and the elastic member is compressed when the lifting member drives the lifting plate to move upward.

[0024] A method for welding and shaping the periphery of a lithium-ion battery is disclosed. The device is used to clamp the first and second opposite sides of the lithium-ion battery while welding the periphery of the lithium-ion battery, and to apply an outward adsorption force to the first and / or second sides of the lithium-ion battery.

[0025] In the present invention, the proposed lithium-ion battery peripheral welding fixing and shaping device and welding method place the lithium-ion battery on a base, then drive the lithium-ion battery upward to a welding position by a lifting member, and then clamp the lithium-ion battery by a first side clamping plate and a second side clamping plate. Then, a negative pressure device is used to apply negative pressure to the outside of the lithium-ion battery through a negative pressure hole to improve the bulge, and the negative pressure suction is beneficial to the heat dissipation of welding while reducing thermal deformation. The adsorption of the outer side of the lithium-ion battery facilitates the shaping of the lithium-ion battery and avoids deformation of the lithium-ion battery.

[0026] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 A top view of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the present invention after the first side panel is removed;

[0030] In the figure: 1. Bottom plate; 2. Base; 3. Lifting member; 4. First side clamping plate; 5. Second side clamping plate; 6. Negative pressure hole; 7. Third side clamping plate; 8. Sensor bracket; 9. First telescopic member; 10. Fourth side clamping plate; 11. Second telescopic member; 12. Concave plate; 13. Copper bar; 14. Third telescopic member; 15. Push plate; 16. Lifting plate; 17. Sliding column; 170. Extension ring; 18. Elastic member; 19. Insulating pad. DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention, and are not to be construed as limiting the present invention.

[0032] like Figure 1-Figure 2The device for welding, fixing, and shaping the periphery of a lithium-ion battery shown in the figure comprises a base plate 1 mounted on a frame, and a base 2 for placing the lithium-ion battery mounted on the base plate 1 via a lifting member 3. The lifting member 3 may be a structure such as an electric cylinder or a pneumatic cylinder in the prior art that can drive the component to rise and fall vertically.

[0033] The base plate 1 is provided with a first side clamping plate 4 and a second side clamping plate 5, which are opposite to each other and are used to clamp the lithium-ion battery. The distance between the first side clamping plate 4 and the second side clamping plate 5 is adjustable. The lifting member 3 drives the lithium-ion battery to move between the first side clamping plate 4 and the second side clamping plate 5, and adjusts the first side clamping plate 4 and the second side clamping plate 5 to clamp the lithium-ion battery. The first side clamping plate 4 contacts the first side surface of the lithium-ion battery, and the second side clamping plate 5 is used to clamp the second side surface of the lithium-ion battery.

[0034] A negative pressure hole 6 is provided on the first side clamping plate 4 and / or the second side clamping plate 5. In order to increase the stability of the lithium-ion battery clamping during welding, the gas in the negative pressure hole 6 adsorbs the first side and / or second side of the lithium-ion battery during welding of the lithium-ion battery, thereby avoiding deformation of the lithium-ion battery shell during welding. In order to further improve the welding quality, preferably, a negative pressure hole 6 is provided on the first side clamping plate 4 and the second side clamping plate 5. During welding, the first side clamping plate 4 and the second side clamping plate 5 clamp the lithium-ion battery shell, and the negative pressure hole 6 on the first side clamping plate 4 adsorbs the outside of the lithium-ion battery, and the adsorption force of the negative pressure hole 6 on the first side clamping plate 4 on the first side of the lithium-ion battery is opposite to the force of the first side clamping plate 4 on the first side of the lithium-ion battery. The gas in the negative pressure hole 6 cools the lithium-ion battery shell and shapes the lithium-ion battery shell at the same time to avoid its deformation, thereby further ensuring welding quality.

[0035] Preferably, the first side clamping plate 4 and the second side clamping plate 5 clamp the large side surface of the lithium-ion battery housing. The large side surface of the lithium-ion battery can be understood as a side surface with a large surface area.

[0036] Preferably, the first side clamping plate 4 and the second side clamping plate 5 have a negative pressure cavity, and there are multiple negative pressure holes 6 on the first side clamping plate 4 and the second side clamping plate 5. The multiple negative pressure holes 6 on the first side clamping plate 4 are connected to the negative pressure cavity on the first side clamping plate 4, and the multiple negative pressure holes 6 on the second side clamping plate 5 are connected to the negative pressure cavity on the second side clamping plate 5. The negative pressure equipment is connected to the negative pressure cavity, and only one set of negative pressure equipment is needed to realize the adsorption of multiple sets of negative pressure holes 6 on the lithium-ion battery casing.

[0037] Preferably, the first side clamping plate 4 is fixed on the bottom plate 1 , and a third side clamping plate 7 is fixed on the first side clamping plate 4 . The third side clamping plate 7 is perpendicular to the first side clamping plate 4 and is used to limit the third side surface of the lithium-ion battery.

[0038] Preferably, an opening is formed on the third side clamping plate 7 , and a sensor bracket 8 is installed at the opening. The sensor bracket 8 is used to install a photoelectric sensor for detecting the position of the lithium-ion battery.

[0039] Preferably, to further enhance the lithium-ion battery's securing effect, a first telescopic member 9 is provided on the base plate 1. A fourth side clamping plate 10, opposite the third side clamping plate 7, is mounted on the movable end of the first telescopic member 9. The first telescopic member 9 is used to adjust the distance between the fourth side clamping plate 10 and the third side clamping plate 7, so that the fourth side clamping plate 10 contacts the fourth side surface of the lithium-ion battery. It should be noted that the first telescopic member 9 can be a structure such as an electric cylinder or a pneumatic cylinder, as known in the prior art, that can drive linear motion of a component. In this embodiment, the first telescopic member 9 is a pneumatic cylinder.

[0040] Preferably, the second side clamping plate 5 is installed on the base plate 1 through a second telescopic member 11. The second telescopic member 11 can be a structure such as an electric cylinder or a pneumatic cylinder in the prior art that can drive components to move linearly. The second telescopic member 11 is used to adjust the distance between the second side clamping plate 5 and the first side clamping plate 4.

[0041] Preferably, a concave plate 12 is installed on the base plate 1, and the second telescopic member 11 of the concave plate 12 is installed on the concave plate 12. A push plate 15 is also installed on the base plate 1 through a third telescopic member 14. The push plate 15 is used to push the second side clamping plate 5 to move toward the direction close to the first side clamping plate 4 and apply auxiliary thrust to the second side clamping plate 5.

[0042] Specifically, the second telescopic member 11 is a CJPB needle cylinder, and there are four groups of the second telescopic members 11, which are located at the four corners of the second side clamping plate 5, and the third telescopic member 14 is a double cylinder.

[0043] Preferably, copper strips 13 are provided on both the first side clamping plate 4 and the second side clamping plate 5 to further enhance the heat conduction effect.

[0044] Preferably, it further comprises a lifting plate 16 vertically slidably mounted on the bottom plate 1 , the base 2 is mounted on the lifting plate 16 , and the lifting end of the lifting member 3 is connected to the lifting plate 16 .

[0045] Preferably, a sliding post 17 is fixed to the lifting plate 16, and a sliding hole matching the sliding post 17 is opened in the base plate 1. The sliding post 17 passes through the sliding hole and has a portion located below the base plate 1. An extension ring 170 is provided at the bottom of the sliding post 17. An elastic member 18 is provided between the extension ring 170 and the base plate 1. When the lifting plate 16 moves upward, the elastic member 18 is squeezed. Preferably, the elastic member 18 is a spring, which is sleeved on the outside of the sliding post 17. Four sets of sliding posts 17 and elastic members 18 are provided and distributed at the four corners of the lifting plate 16, further increasing stability and ensuring welding quality.

[0046] Preferably, the base 2 is mounted on the lifting plate 16 via insulating spacers 19 .

[0047] Specifically, during the welding process of the lithium-ion battery, the lithium-ion battery is first placed on the base 2, and the lifting member 3 drives the lithium-ion battery to move upward, and then the first telescopic member 9, the second telescopic member 11 and the third telescopic member 14 are actuated to enable the second side clamping plate 5 and the fourth side clamping plate 10 to clamp the lithium-ion battery shell. When the photoelectric sensor detects that the lithium-ion battery has reached the corresponding position, the first side clamping plate 4, the second side clamping plate 5, the third side clamping plate 7 and the fourth side clamping plate 10 complete the clamping of the lithium-ion battery shell. Then, the negative pressure device is connected to the negative pressure chamber to enable the negative pressure holes 6 on the first side clamping plate 4 and the second side clamping plate 5 to suck the outer wall of the lithium-ion battery outward. The first side clamping plate 4 and the second side clamping plate 5 clamp the lithium-ion battery and the negative pressure hole 6 sucks the lithium-ion battery shell outward while the lithium-ion battery is welded around the periphery. During welding, the lithium-ion battery is shaped and cooled at the same time to ensure welding quality.

[0048] A method for welding the periphery of a lithium-ion battery comprises the following steps: when welding the periphery of the lithium-ion battery, the lithium-ion battery shell is clamped by a first side clamping plate 4 and a second side clamping plate 5, and the lithium-ion battery shell is simultaneously adsorbed outwards by negative pressure holes 6 on the first side clamping plate 4 and / or the second side clamping plate 5.

[0049] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0051] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0052] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature.

[0053] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A device for welding, fixing and shaping the periphery of a lithium-ion battery, characterized in that: It comprises a base plate (1), on which a base (2) for placing a lithium-ion battery is mounted via a lifting member (3); The bottom plate (1) is provided with a first side clamping plate (4) and a second side clamping plate (5) which are opposite to each other and used for clamping the lithium-ion battery; a negative pressure hole (6) is provided on the first side clamping plate (4) and / or the second side clamping plate (5); When welding the periphery of the lithium-ion battery, the first side clamping plate (4) and the second side clamping plate (5) clamp the first side and the second side of the lithium-ion battery, and the negative pressure hole (6) applies an outward suction force to the lithium-ion battery.

2. The lithium-ion battery peripheral welding, fixing and shaping device according to claim 1, characterized in that: Negative pressure holes (6) are provided on both the first side clamping plate (4) and the second side clamping plate (5).

3. The lithium-ion battery peripheral welding, fixing and shaping device according to claim 1, characterized in that: The first side clamping plate (4) is fixed on the bottom plate (1), and a third side clamping plate (7) is fixed on the first side clamping plate (4), and the third side clamping plate (7) is used to limit the third side surface of the lithium-ion battery.

4. The lithium-ion battery peripheral welding, fixing and shaping device according to claim 3, characterized in that: A fourth side clamping plate (10) opposite to the third side clamping plate (7) is mounted on the bottom plate (1) via a first telescopic member (9), and the fourth side clamping plate (10) is used to clamp the fourth side surface of the lithium-ion battery.

5. The lithium-ion battery peripheral welding, fixing and shaping device according to claim 1, characterized in that: The second side clamping plate (5) is mounted on the base plate (1) via a second telescopic member (11), and the second telescopic member (11) is used to adjust the distance between the first side clamping plate (4) and the second side clamping plate (5).

6. The lithium-ion battery peripheral welding, fixing and shaping device according to claim 5, characterized in that: A push plate (15) is installed on the base plate (1) through a third telescopic member (14). The push plate (15) contacts the second side clamping plate (5) and is used to drive the second side clamping plate (5) to move toward the first side clamping plate (4) and provide auxiliary support for the second side clamping plate (5).

7. The lithium-ion battery peripheral welding, fixing and shaping device according to claim 6, characterized in that: The second telescopic members (11) are provided with at least two groups, and the at least two groups of the second telescopic members (11) are located outside the push plate (15).

8. The lithium-ion battery peripheral welding, fixing and shaping device according to claim 1, characterized in that: It also includes a lifting plate (16) vertically slidably mounted on the bottom plate (1), the base (2) is mounted on the lifting plate (16), and the lifting end of the lifting member (3) is connected to the lifting plate (16); An elastic member (18) is provided between the lifting plate (16) and the bottom plate (1).

9. The lithium-ion battery peripheral welding, fixing and shaping device according to claim 8, characterized in that: A sliding column (17) is provided at the bottom of the lifting plate (16), a sliding hole matching the sliding column (17) is opened on the bottom plate (1), the sliding column (17) passes through the sliding hole and has a portion located below the bottom plate (1), an extension ring (170) is provided at the bottom of the sliding column (17), and the elastic member (18) is arranged between the bottom plate (1) and the extension ring (170), and the elastic member (18) is compressed when the lifting member (3) drives the lifting plate (16) to move upward.

10. A method for welding and shaping the periphery of a lithium-ion battery, characterized in that: While welding the periphery of the lithium-ion battery, the first side surface and the second side surface opposite to the lithium-ion battery are clamped, and an outward adsorption force is applied to the first side surface and / or the second side surface of the lithium-ion battery.

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