Battery pole welding tool

Abstract

The utility model discloses a battery pole welding tool which comprises two carrying table mechanisms used for fixing a stacked core and a welding positioning mechanism arranged between the two carrying table mechanisms. The welding positioning mechanism comprises a bearing block, and a first positioning groove used for positioning a tab is formed in the bearing block; a cavity for containing cooling liquid is formed in the bearing block, and a liquid inlet hole and a liquid outlet hole which are communicated with the cavity are further formed in the bearing block. The battery cell is fixed through the carrying table mechanism, the welding position of the tab is accurately found through the welding positioning mechanism, the welding quality is improved, in addition, a cavity is formed in the bearing block of the welding positioning mechanism, flowing refrigerating fluid is injected into the cavity to cool the bearing block, and the situation that a cover plate plastic part is heated and damaged due to the fact that the bearing block is heated and hot due to welding is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a battery pole welding tool. Background Art

[0002] With the widespread adoption of lithium-ion batteries in the electric vehicle industry, research on high-capacity, high-power, and high-energy-density lithium-ion batteries has garnered significant attention. Typically, double-stacked cores are assembled using butterfly welding, with connectors connecting the cores. These connectors are then connected to the cover plate using laser welding.

[0003] Large-capacity, high-power batteries require the connector to have a strong current-carrying capacity, and the thickness of the connector is usually increased to meet the current-carrying requirements. The increased thickness of the connector can easily lead to excessive heat during welding, causing burns and deformation of the cover plate injection molded parts and the sealing ring, resulting in poor appearance and even poor airtightness. Large-capacity batteries mean more core layers, and high-power batteries mean wider tabs. After the connector and cover are welded, the tabs are easily unevenly stressed when removing the core due to the heavy core stack, causing the tabs to tear. Problems with burns on the cover plate injection molded parts and torn tabs can seriously lead to battery failure and pose a serious safety hazard. Utility Model Content

[0004] The utility model aims to provide a battery pole welding tool, which provides a cavity in a welding positioning mechanism and is filled with flowing refrigerant to cool the battery pole and avoid burns.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] The utility model discloses a battery pole welding tool, comprising two platform mechanisms for fixing stacked cores and a welding positioning mechanism arranged between the two platform mechanisms; the welding positioning mechanism comprises a supporting block, the supporting block is provided with a first positioning groove for positioning the pole ear; the supporting block has a cavity for accommodating coolant, and the supporting block is also provided with a liquid inlet hole and a liquid outlet hole connected to the cavity.

[0007] A further solution: the platform mechanism and the welding positioning mechanism are hingedly connected.

[0008] A further solution: the supporting block is provided with a second positioning groove for clamping the battery cover fixing piece.

[0009] A further solution: the platform mechanism includes a base plate and positioning piles arranged around the outer edge of the base plate.

[0010] A further solution: the support block is made of heat-conducting metal.

[0011] A further solution: the positioning piles are arranged at intervals on two opposite sides of the base plate.

[0012] A further solution: the rotation angle of the hinge between the platform mechanism and the welding positioning mechanism is not less than 90°.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] This utility model employs an innovative design, in which a carrier mechanism is used to securely hold the battery cell, ensuring precise positioning before welding. The welding positioning mechanism then precisely locates the tab's welding position, significantly improving welding accuracy and quality. Furthermore, a cavity has been cleverly created within the welding positioning mechanism's support block, which is filled with flowing coolant. This design effectively cools the support block, preventing it from overheating due to the high temperatures generated during welding, thereby protecting the plastic cover from thermal damage.

[0015] It's worth noting that the welding positioning mechanism and the carrier mechanism are connected by a hinge. This design not only makes the entire mechanism more flexible and convenient when rotating, but also greatly simplifies the integration of the core stack after welding. Once the welding work is completed, simply flipping the carrier mechanism on one side upward can smoothly lift the entire side of the core stack and cover plate, thus easily completing the core connection operation. Even more cleverly, during the lifting process, the force on the tab is evenly distributed, effectively avoiding the risk of the tab tearing due to uneven force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a structural diagram of the welding positioning mechanism in the present utility model;

[0018] Figure 3 This is a schematic structural diagram of the platform mechanism in the utility model;

[0019] In the figure: 1-carrier mechanism, 11-base plate, 12-positioning pile, 2-welding positioning mechanism, 21-supporting block, 22-first positioning groove, 23-liquid inlet, 24-liquid outlet, 25-second positioning groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not 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 efforts are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the present invention is usually placed when in use. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0022] See also Figure 1-3 In this embodiment, a battery terminal welding tool includes two carrier mechanisms 1 and a welding positioning mechanism 2 disposed between the two carrier mechanisms 1. The welding positioning mechanism 2 includes a support block 21 having a first positioning groove 22 for positioning the tab. The support block 21 has a cavity for accommodating coolant and is further provided with a liquid inlet 23 and a liquid outlet 24 communicating with the cavity. A stacked core is placed on each carrier mechanism 1, with the tabs of the stacked core overlapping in the first positioning groove 22 to facilitate subsequent laser welding. The first positioning groove 22 also serves as the welding area. During welding, a large amount of heat is conducted to the support block 21, causing the temperature to rise sharply. Therefore, introducing flowing coolant into the cavity helps cool the support block 21 and prevent it from scalding the injection-molded cover.

[0023] Furthermore, the platform mechanism 1 is hingedly connected to the welding positioning mechanism 2. After welding, the core stack is integrated by rotating the hinge. That is, after welding, the platform mechanism 1 on one side is flipped upward, driving the entire side of the core stack and the cover plate to lift up and complete the core assembly. During the lifting process, the tabs are evenly stressed, which can prevent the tabs from tearing.

[0024] Furthermore, a second positioning groove 25 for engaging the battery cover fixing member is formed on the supporting block 21. The second positioning groove 25 matches the outer contour of the battery cover fixing member and is used to position the cover.

[0025] Furthermore, the platform mechanism 1 includes a base plate 11 and positioning stakes 12 arranged around the outer edge of the base plate 11. There are multiple positioning stakes 12, divided into two rows, and arranged at intervals on two opposite sides of the base plate 11, leaving the other two sides open for easy pick-up and place operations.

[0026] Furthermore, the support block 21 is made of heat-conducting metal, which helps to dissipate heat quickly and avoid scalding the tabs and the cover.

[0027] Furthermore, the material of the stage mechanism 1 is not limited, and can be set to aluminum in order to be hinged with the welding positioning mechanism 2.

[0028] Furthermore, the rotation angle of the hinge between the platform mechanism 1 and the welding positioning mechanism 2 is not less than 90°.

[0029] When the present invention is in use, first take two stacked cores and place them on two carrier mechanisms 1 respectively, adjust the position of the stacked cores so that their pole ears overlap on the first positioning groove 22, take a connecting piece and place it on the pole ear, use laser penetration welding to make the three firmly connected, then cover the battery cover plate on the supporting block 21, make the fixing parts of the cover plate snap together with the second positioning groove 25, complete the positioning of the cover plate, and then use laser penetration welding to weld the connecting piece and the pole of the cover plate together. After welding is completed, turn the carrier mechanism 1 upward from one side, push the stacked core and the cover plate to stand up as a whole, and complete the core closure.

[0030] Although this specification is described according to 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.

[0031] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent modifications made according to the scope of the claims of the present application are within the scope of protection of the claims of the present application.

Claims

1. A battery pole welding tool, characterized in that: The invention comprises two carrier mechanisms (1) for fixing the stacked cores, and a welding positioning mechanism (2) arranged between the two carrier mechanisms (1); the welding positioning mechanism (2) comprises a supporting block (21), the supporting block (21) is provided with a first positioning groove (22) for positioning the tab; the supporting block (21) has a cavity for accommodating a coolant, and the supporting block (21) is further provided with a liquid inlet hole (23) and a liquid outlet hole (24) communicating with the cavity.

2. The battery pole welding tool according to claim 1, characterized in that: The platform mechanism (1) and the welding positioning mechanism (2) are hingedly connected.

3. The battery pole welding tool according to claim 1, characterized in that: The supporting block (21) is provided with a second positioning groove (25) for clamping the battery cover fixing piece.

4. The battery pole welding tool according to claim 1, characterized in that: The platform mechanism (1) comprises a base plate (11) and positioning piles (12) arranged around the outer edge of the base plate (11).

5. The battery pole welding tool according to claim 1, characterized in that: The material of the supporting block (21) is heat-conducting metal.

6. The battery pole welding tool according to claim 4, characterized in that: The positioning piles (12) are arranged at intervals on two opposite sides of the bottom plate (11).

7. The battery pole welding tool according to claim 2, characterized in that: The rotation angle of the hinged connection between the platform mechanism (1) and the welding positioning mechanism (2) is not less than 90°.

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