Device for fixing PP film outside battery cell of lithium ion battery before pre-welding

Abstract

The utility model discloses a fixing device for a battery cell external PP film before pre-welding of a lithium ion battery, and belongs to the technical field of battery production. Clamping plate cylinders are arranged on two sides of the battery cell placing platform, an upper cover front-and-back movement cylinder is arranged at one end part, the clamping plate cylinders are connected with a lower clamping plate and an upper clamping plate which are correspondingly matched, and the upper cover front-and-back movement cylinder is connected with an upper cover positioning plate. The upper end of the hot-melting pen fixing frame is connected with a power supply, the middle part is connected with the hot-melting pen sliding rail, and the lower end is connected with the hot-melting pen up-and-down movement cylinder; the power source is connected with the electric heating wire, the electric heating wire is arranged on the heating wire fixing frame, the lower end of the electric heating wire is connected with the hot melting pen, the heating wire fixing frame is connected with the hot melting pen sliding block, the hot melting pen sliding block is connected with the hot melting pen sliding rail, and the hot melting pen vertical movement air cylinder is connected with the hot melting pen. According to the utility model, the problem of position deviation of the PP film in the assembly process is avoided, the stability and the safety of the battery are ensured, the production yield is improved, and the product stability and the quality consistency of the whole production line are improved.

Description

Technical Field

[0001] The utility model relates to a device for fixing a PP film on the outside of a lithium-ion battery cell before pre-welding, and belongs to the technical field of battery production. Background Art

[0002] During the assembly of lithium-ion battery cells, a protective layer of PP film is typically applied to the outside of the cells to prevent scratches during subsequent handling and to avoid short circuits caused by damaged separators. In existing technology, the PP film is not fixedly connected to the cells. During lithium battery installation, the cells are first welded to the upper cover plate and then manually installed into the aluminum shell along with the PP film. Because the PP film is in a free state and lacks a stable connection to the cells or the upper cover plate, it is prone to positional shifting during the installation process. This positional shift primarily manifests as one side of the PP film being higher than the upper edge of the aluminum shell. When this occurs, the weld surface between the upper cover plate and the aluminum shell is disturbed, preventing effective welding between the two. This not only affects the overall packaging quality of the lithium battery but can also pose safety risks during use. Utility Model Content

[0003] In order to solve the problems existing in the background technology, the utility model provides a device for fixing the external PP film of a lithium-ion battery cell before pre-welding.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a device for fixing the external PP film of a lithium-ion battery cell before pre-welding, comprising a placement mechanism, a positioning mechanism and four hot-melt mechanisms, wherein a positioning mechanism is provided at the upper end of the placement mechanism, the placement mechanism and the four hot-melt mechanisms are arranged in coordination, and the four hot-melt mechanisms are arranged in an array.

[0005] The placement mechanism includes a battery cell placement platform, a battery cell placement platform slide rail, a base and a battery cell placement platform slider; the upper end of the base is fixed with a battery cell placement platform slide rail, the battery cell placement platform slider is slidably provided on the battery cell placement platform slide rail, and the battery cell placement platform slider is fixedly connected to the battery cell placement platform.

[0006] The positioning mechanism includes a splint cylinder, a cylinder for moving the upper cover forward and backward, an upper cover positioning plate, a lower splint and an upper splint; splint cylinders are provided on the left and right sides of the battery cell placement platform, and the piston rod of each splint cylinder is fixedly connected to the corresponding lower splint, and upper splints are fixed on the opposite surfaces of the two splint cylinder bodies, and each upper splint is respectively matched with the corresponding lower splint; a horizontally arranged upper cover forward and backward movement cylinder is provided at one end of the battery cell placement platform, and the piston rod of the upper cover forward and backward movement cylinder is fixedly connected to the middle part of the upper cover positioning plate.

[0007] Each of the hot melt mechanisms includes a power supply, an electric heating wire, a hot melt pen fixing bracket, a hot melt pen up and down movement cylinder, a hot melt pen, a hot melt pen slide rail, a hot melt pen slider and a heating wire fixing bracket; the upper end of the hot melt pen fixing bracket is fixedly connected to the power supply, the middle part of the hot melt pen fixing bracket is fixedly connected to the hot melt pen slide rail, and the lower end of the hot melt pen fixing bracket is fixedly connected to the cylinder body of the hot melt pen up and down movement cylinder; the power supply is fixedly connected to the electric heating wire, the electric heating wire is arranged on the heating wire fixing bracket, the lower end of the electric heating wire is connected to the hot melt pen, the heating wire fixing bracket is fixedly connected to the hot melt pen slider, the hot melt pen slider is slidably connected to the hot melt pen slide rail, and the piston rod of the hot melt pen up and down movement cylinder is fixedly connected to the hot melt pen.

[0008] Compared with the prior art, the beneficial effects of the present invention are:

[0009] 1. The utility model avoids the problem of position deviation of the PP film during the assembly process, solves the risks in the prior art such as short circuit between the lead and the shell caused by poor position of the PP film, and poor welding caused by excessive length of the PP film, ensures the stability and safety of the battery, and improves the production yield.

[0010] 2. The utility model ensures the consistency of hot melting of PP film during the assembly process of each battery cell through the positioning mechanism, thereby improving the product stability and quality consistency of the entire production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 yes Figure 1 The main view;

[0013] Figure 3 yes Figure 1 Left view of;

[0014] Figure 4 yes Figure 1 A top view of

[0015] Figure 5 It is a structural diagram of the hot melt mechanism. DETAILED DESCRIPTION

[0016] The technical solutions of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] A device for fixing the external PP film of a lithium-ion battery cell before pre-welding comprises a placement mechanism, a positioning mechanism and four hot-melt mechanisms. The upper end of the placement mechanism is provided with a positioning mechanism. The placement mechanism and the four hot-melt mechanisms are all arranged in coordination. The four hot-melt mechanisms are arranged in an array.

[0018] The placement mechanism includes a battery cell placement platform 7, a battery cell placement platform slide rail 8, a base 9 and a battery cell placement platform slider 10; the upper end of the base 9 is fixed with a battery cell placement platform slide rail 8, and a battery cell placement platform slider 10 is slidably provided on the battery cell placement platform slide rail 8. The battery cell placement platform slider 10 is fixedly connected to the battery cell placement platform 7, and the battery cell can be placed in or pulled out by sliding back and forth.

[0019] The positioning mechanism includes a clamping plate cylinder 6, a cylinder for front-back movement of the upper cover 11, an upper cover positioning plate 12, a lower clamping plate 16 and an upper clamping plate 17; clamping plate cylinders 6 are provided on the left and right sides of the battery cell placement platform 7, and the cylinder body of each clamping plate cylinder 6 is fixedly connected to the frame of the device, and the piston rod of each clamping plate cylinder 6 is fixedly connected to the corresponding lower clamping plate 16, and upper clamping plates 17 are fixed to the opposite surfaces of the cylinder bodies of the two clamping plate cylinders 6, and each upper clamping plate 17 is respectively matched with the corresponding lower clamping plate 16; a horizontally arranged cylinder for front-back movement of the upper cover 11 is provided at one end of the battery cell placement platform 7, and the cylinder body of the cylinder for front-back movement of the upper cover 11 is fixedly connected to the frame of the device, and the piston rod of the cylinder for front-back movement of the upper cover 11 is fixedly connected to the middle part of the upper cover positioning plate 12. The clamping plate cylinder 6 prevents the battery cells from moving during the hot melt process.

[0020] Each of the hot melt mechanisms includes a power supply 1, an electric heating wire 2, a hot melt pen fixing frame 3, a hot melt pen up and down movement cylinder 4, a hot melt pen 5, a hot melt pen slide rail 13, a hot melt pen slider 14 and a heating wire fixing frame 15; the hot melt pen fixing frame 3 is fixedly connected to the frame of the device, the upper end of the hot melt pen fixing frame 3 is fixedly connected to the power supply 1, the middle part of the hot melt pen fixing frame 3 is fixedly connected to the hot melt pen slide rail 13, and the lower end of the hot melt pen fixing frame 3 is fixedly connected to the cylinder body of the hot melt pen up and down movement cylinder 4; the power supply 1 is fixedly connected to the electric heating wire 2, the electric heating wire 2 is arranged on the heating wire fixing frame 15, the lower end of the electric heating wire 2 is connected to the hot melt pen 5, the heating wire fixing frame 15 is fixedly connected to the hot melt pen slider 14, the hot melt pen slider 14 is slidably connected to the hot melt pen slide rail 13, and the piston rod of the hot melt pen up and down movement cylinder 4 is fixedly connected to the hot melt pen 5.

[0021] The working process of this utility model is as follows:

[0022] S1: Place the cell envelope that has been welded to the upper cover on the cell placement platform 7 and push it into the hot melt position;

[0023] S2: The two clamping cylinders 6 work to clamp the battery cell;

[0024] S3: The upper cover forward and backward movement cylinder 11 drives the upper cover positioning plate 12 to move and press the upper cover plate and the PP film together;

[0025] S4: Power supply 1 controls heating wire 2 to heat up, and then transfers heat to hot melt pen 5;

[0026] S5: The hot melt pen moves up and down. The cylinder 4 drives the hot melt pen 5 to move, and the PP film is hot-melted on the upper cover holder.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0028] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A device for fixing the external PP film of a lithium-ion battery cell before pre-welding, characterized in that: It comprises a placing mechanism, a positioning mechanism and four hot-melt mechanisms. The upper end of the placing mechanism is provided with a positioning mechanism. The placing mechanism and the four hot-melt mechanisms are all arranged in coordination. The four hot-melt mechanisms are arranged in an array.

2. A device for fixing the external PP film of a lithium-ion battery cell before pre-welding according to claim 1, characterized in that: The placement mechanism comprises a battery cell placement platform (7), a battery cell placement platform slide rail (8), a base (9) and a battery cell placement platform slider (10); the battery cell placement platform slide rail (8) is fixed to the upper end of the base (9), the battery cell placement platform slider (10) is slidably provided on the battery cell placement platform slide rail (8), and the battery cell placement platform slider (10) is fixedly connected to the battery cell placement platform (7).

3. A device for fixing the external PP film of a lithium-ion battery cell before pre-welding according to claim 2, characterized in that: The positioning mechanism comprises a clamping plate cylinder (6), an upper cover front-back movement cylinder (11), an upper cover positioning plate (12), a lower clamping plate (16) and an upper clamping plate (17); the left and right sides of the battery cell placement platform (7) are correspondingly provided with clamping plate cylinders (6), the piston rod of each clamping plate cylinder (6) is respectively fixedly connected to the corresponding lower clamping plate (16), the upper clamping plates (17) are respectively fixedly connected to the opposite surfaces of the cylinder bodies of the two clamping plate cylinders (6), and each upper clamping plate (17) is respectively arranged in cooperation with the corresponding lower clamping plate (16); a horizontally arranged upper cover front-back movement cylinder (11) is provided at one end of the battery cell placement platform (7), and the piston rod of the upper cover front-back movement cylinder (11) is fixedly connected to the middle part of the upper cover positioning plate (12).

4. The device for fixing the external PP film of a lithium-ion battery cell before pre-welding according to claim 1, characterized in that: Each of the hot melt mechanisms comprises a power source (1), an electric heating wire (2), a hot melt pen fixing frame (3), a hot melt pen up and down movement cylinder (4), a hot melt pen (5), a hot melt pen slide rail (13), a hot melt pen slider (14) and a heating wire fixing frame (15); the upper end of the hot melt pen fixing frame (3) is fixedly connected to the power source (1), the middle part of the hot melt pen fixing frame (3) is fixedly connected to the hot melt pen slide rail (13), and the lower end of the hot melt pen fixing frame (3) is fixedly connected to the hot melt pen up and down movement cylinder (4). The cylinder body of the cylinder (4) is fixedly connected; the power supply (1) is fixedly connected to the electric heating wire (2), the electric heating wire (2) is arranged on a heating wire fixing frame (15), the lower end of the electric heating wire (2) is connected to the hot melt pen (5), the heating wire fixing frame (15) is fixedly connected to the hot melt pen slider (14), the hot melt pen slider (14) is slidably connected to the hot melt pen slide rail (13), and the piston rod of the hot melt pen up and down moving cylinder (4) is fixedly connected to the hot melt pen (5).

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