Lithium ion battery welding protection device

Abstract

The utility model provides a lithium ion battery welding protection device, which relates to the technical field of lithium ion battery welding packaging, and comprises two symmetrically arranged protection shells, the two protection shells are buckled and installed at the top of a lithium ion battery, the protection shells are of cuboid shell structures, and two side surfaces close to the lithium ion battery are arranged in a penetrating manner; the buckling surface of the protective shell is provided with two welding grooves used for welding an electrode on a pole, the two welding grooves buckled together are matched with the periphery of the electrode, and the middle part of the protective shell is provided with an accommodating cavity used for accommodating an anti-explosion valve and a liquid injection hole; when an electrode is welded on the pole, the two protective shells are buckled together from the two sides of the top of the lithium ion battery, so that the explosion-proof valve and the liquid injection hole are protected by the accommodating cavity, meanwhile, the shell sealing area between the shell and the top edge of the lithium ion battery is protected by the protective shells, and then the electrode is placed in the welding groove; and then the pole and the electrode are welded together.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery welding and packaging technology, and in particular to a lithium-ion battery welding protection device. Background Technology

[0002] In the manufacturing process of existing lithium-ion batteries, laser welding is often used to achieve a firm connection between battery components. Common areas requiring laser welding include explosion-proof valves, terminals, flexible connections, casing seals (also known as side seals or edge seals), injection holes, and modules. During the welding of terminals and electrodes, the laser can easily burn the casing seals, and welding spatter can fall into the injection holes and burn the explosion-proof valves. Therefore, a lithium-ion battery welding protection device is proposed. Utility Model Content

[0003] To address at least one of the aforementioned technical shortcomings, this utility model provides a lithium-ion battery welding protection device, comprising two symmetrically arranged protective shells. The two protective shells are fastened together and installed on the top of the lithium-ion battery. The protective shells are rectangular shell structures with two through-holes on the two sides near the lithium-ion battery. The fastening surfaces of the protective shells have two welding grooves for welding electrodes onto the terminals. The two fastened welding grooves fit around the electrodes. The middle of the protective shell has a receiving cavity for accommodating an explosion-proof valve and a liquid injection hole.

[0004] Furthermore, a buffer layer fixed to the inner wall of the protective shell is provided between the contact surface between the protective shell and the lithium-ion battery.

[0005] Preferably, the buffer layer is made of elastic rubber.

[0006] Furthermore, it also includes a cylinder, the output end of which is fixedly connected to the outer wall of the protective shell.

[0007] Preferably, the cylinder is set at a 45° angle with the vertical direction.

[0008] Preferably, the cylinder is arranged vertically.

[0009] Preferably, the cylinder is horizontally positioned.

[0010] Beneficial effects: When welding electrodes onto the terminals, first fasten two protective shells together from the top sides of the lithium-ion battery to protect the explosion-proof valve and the filling hole in the containment cavity. At the same time, the protective shells protect the casing sealing area between the outer shell and the top edge of the lithium-ion battery. Then, place the electrodes into the welding tank and weld the terminals and electrodes together.

[0011] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Attached Figure Description

[0012] Figure 1 This is an isometric view of the entire utility model.

[0013] Figure 2 This is an isometric view of the protective shell of this utility model.

[0014] Figure 3 This is an isometric view of the receiving cavity of this utility model.

[0015] exist Figures 1 to 3 The correspondence between the component names or lines and the attached drawing numbers is as follows: Protective shell 1, welding groove 101, receiving cavity 102, buffer layer 103, cylinder 2. Detailed Implementation

[0016] Please refer to Figures 1 to 3 ;

[0017] This embodiment provides a lithium-ion battery welding protection device, including two symmetrically arranged protective shells 1. The two protective shells 1 are fastened and installed on the top of the lithium-ion battery. The protective shell 1 has a cuboid shell structure and is arranged through the two sides near the lithium-ion battery. The fastening surface of the protective shell 1 has two welding grooves 101 for welding electrodes on the terminal post. The two fastened welding grooves 101 fit the outer periphery of the electrode. The middle part of the protective shell 1 has a receiving cavity 102 for accommodating the explosion-proof valve and the liquid injection hole.

[0018] In practice, when welding electrodes onto the terminals, the two protective shells 1 are first fastened together from the top sides of the lithium-ion battery, so that the receiving cavity 102 protects the explosion-proof valve and the liquid injection hole. At the same time, the protective shells 1 protect the shell sealing area between the outer shell and the top edge of the lithium-ion battery. Then, the electrodes are placed into the welding groove 101, and the terminals and electrodes are welded together.

[0019] Furthermore, a buffer layer 103 fixed to the inner wall of the protective shell 1 is provided between the contact surface between the protective shell 1 and the lithium-ion battery.

[0020] In practice, the buffer layer 103 is used to prevent the protective shell 1 from damaging the surface of the lithium-ion battery.

[0021] The principle for selecting materials for the buffer layer 103 is that the hardness should be less than that of the surface of the lithium-ion battery.

[0022] Preferably, the buffer layer 103 is made of elastic rubber.

[0023] In practice, elastic rubber is used to prevent damage to the surface of the lithium-ion battery.

[0024] Furthermore, it also includes cylinder 2, the output end of which is fixedly connected to the outer wall of protective shell 1.

[0025] In practical implementation, by setting up cylinder 2, the protective shell 1 can be automatically controlled by cylinder 2, so that the protective shell 1 can be adapted to the automated welding production line.

[0026] Preferably, the cylinder 2 is set at an angle of 45° with the vertical direction.

[0027] In practice, the protective shell 1 can be positioned at a 45° angle away from and close to the lithium-ion battery.

[0028] Preferably, cylinder 2 is arranged vertically.

[0029] In practice, the protective shell 1 can be positioned vertically away from and close to the lithium-ion battery.

[0030] Preferably, cylinder 2 is horizontally positioned.

[0031] In practice, the protective shell 1 can be positioned horizontally away from and close to the lithium-ion battery.

Claims

1. A lithium-ion battery welding protection device, characterized in that: It includes two symmetrically arranged protective shells (1), which are fastened to the top of the lithium-ion battery. The protective shell (1) has a rectangular shell structure and is arranged through the two sides near the lithium-ion battery. The fastening surface of the protective shell (1) has two welding grooves (101) for welding electrodes on the pole piece. The two welding grooves (101) fastened together fit the outer periphery of the electrode. The middle part of the protective shell (1) has a receiving cavity (102) for accommodating the explosion-proof valve and the liquid injection hole.

2. The lithium-ion battery welding protection device according to claim 1, characterized in that: A buffer layer (103) fixed on the inner wall of the protective shell (1) is provided between the contact surface of the protective shell (1) and the lithium-ion battery.

3. The lithium-ion battery welding protection device according to claim 2, characterized in that: The buffer layer (103) is made of elastic rubber.

4. A lithium-ion battery welding protection device according to claim 2, characterized in that: It also includes a cylinder (2), the output end of which is fixedly connected to the outer wall of the protective shell (1).

5. A lithium-ion battery welding protection device according to claim 4, characterized in that: The cylinder (2) is set at an angle of 45° with the vertical direction.

6. A lithium-ion battery welding protection device according to claim 4, characterized in that: The cylinder (2) is set vertically.

7. A lithium-ion battery welding protection device according to claim 4, characterized in that: The cylinder (2) is set horizontally.

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