Laser welding compression device with liquid cooling heat dissipation structure

Abstract

The utility model belongs to lithium ion battery technical field, concretely relates to a laser welding pressure device with liquid cooling heat dissipation structure, including pressure head main body, set up at least one liquid cooling interface on pressure head main body and the connecting structure that sets up on pressure head main body, the cooling flow channel is equipped with in pressure head main body, cooling flow channel with liquid cooling interface is linked together, the utility model discloses through the integration liquid cooling flow channel system in the welding pressure head inside, and adopts the high thermal conductivity purple copper material, can high -efficient, initiatively take away the large amount of heat produced in the welding process. This effectively avoided the temperature of busbar and pole column when single point welding too fast rise, prevented the battery sealing ring and other key components failure due to overheating, significantly improved the safety and service life of battery.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, specifically relating to a laser welding and pressing device with a liquid cooling heat dissipation structure. Background Technology

[0002] As commercial vehicle batteries develop towards higher capacity and higher charge / discharge rates, the high-current charging and discharging requirements place higher demands on the current-carrying capacity of batteries and high-voltage components. The welding area between the busbar and the terminal has become one of the key factors affecting current-carrying capacity. Laser welding, due to its advantages such as high energy density and fast welding speed, is widely used in the connection process between the busbar and the terminal. However, the large amount of heat generated during laser welding can cause a sharp rise in the workpiece temperature, which not only affects the welding quality but may also damage the sealing structure at the battery terminal, reduce the battery's sealing performance and lifespan, and even cause safety hazards.

[0003] In existing technologies, welding clamping devices primarily focus on clamping functions and structural adjustments, lacking effective heat dissipation mechanisms. For example, some solutions employ air cooling or natural heat dissipation, which has low efficiency and cannot meet the heat dissipation requirements of continuous welding processes. Other solutions, while cooling the welding torch after welding, cannot effectively cool the workpiece and clamping head in real time during the welding process. Furthermore, although some existing devices possess certain heat dissipation structures, they are mostly external or indirect cooling methods, resulting in limited cooling effects and complex structures, which are unfavorable for integration and high-frequency welding operations. Utility Model Content

[0004] The purpose of this invention is to provide a laser welding clamping device with a liquid cooling structure to solve problems such as workpiece overheating, unstable welding quality, and battery safety risks caused by heat accumulation during the laser welding of battery busbars.

[0005] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a laser welding clamping device with a liquid cooling heat dissipation structure, including a clamping head body, at least one liquid cooling interface disposed on the clamping head body, and a connecting structure disposed on the clamping head body; the clamping head body has a cooling channel inside, and the cooling channel is connected to the liquid cooling interface.

[0006] Preferably, the pressure head body has a through hole in the middle for the laser beam to pass through.

[0007] Preferably, the cooling channel includes an inlet channel and an outlet channel disposed on the upper part of the pressure head body, and an annular channel disposed on the lower part of the pressure head body, wherein the inlet channel and the outlet channel are connected to the annular channel.

[0008] Preferably, it also includes a temperature sensor, which is disposed on the pressure head body.

[0009] Preferably, the temperature sensor is fixedly connected to the pressure head body via thermally conductive silicone.

[0010] Preferably, the liquid cooling interface is an oil nozzle, which is fixed to the pressure head body by a threaded connection.

[0011] Preferably, the connection structure is a connecting plate, which is fixed to the pressure head body by fasteners.

[0012] Preferably, the pressure head body is made of copper.

[0013] Preferably, the axis of the annular flow channel is parallel to the workpiece to be pressed on the lower surface of the pressure head body.

[0014] Preferably, the liquid cooling interface includes a coolant inlet and a coolant outlet.

[0015] The beneficial effects of this invention are as follows: By integrating a liquid-cooled flow channel system inside the welding head and using highly thermally conductive copper, this invention can efficiently and actively dissipate the large amount of heat generated during the welding process. This effectively avoids the rapid temperature rise of the busbar and electrode during single-point welding, preventing critical components such as the battery sealing ring from failing due to overheating, and significantly improving battery safety and lifespan. Simultaneously, it solves the problem of heat accumulation in the welding head itself during continuous operation and its transfer to subsequent workpieces, ensuring the stability and consistency of the welding process. Furthermore, by adding a contact temperature sensor to monitor the welding head temperature in real time, it provides crucial data support for process parameter optimization and process quality control, further ensuring the reliability of welding quality. This device has a compact structure, high heat dissipation efficiency, and is easily integrated into existing laser welding equipment, providing effective technical support for large-area, high-quality welding of high-rate, large-capacity batteries. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the present invention.

[0017] The attached diagram is described below: In the diagram: 100, main body of the pressure head; 101, middle part of the main body of the pressure head; 102, upper part of the main body of the pressure head; 103, lower part of the main body of the pressure head; 104, inlet flow channel; 105, annular flow channel; 106, outlet flow channel; 107, hollow circular hole; 200, oil nozzle; 201, inlet oil nozzle; 202, outlet oil nozzle; 300, connecting plate; 400, temperature sensor; 500, manifold. Detailed Implementation

[0018] It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixed connection," and "fixed connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0022] This utility model discloses a laser welding clamping device with a liquid cooling heat dissipation structure, such as... Figure 1 and Figure 2 As shown, the present invention provides a laser welding pressing device with a liquid cooling structure, which mainly includes a pressing head body 100, an oil nozzle 200, a connecting plate 300 and a temperature sensor 400.

[0023] The pressure head body 100 is made entirely of copper, a material with excellent thermal conductivity, and its structure can be divided into a middle section 101, an upper section 102, and a lower section 103. A hollow circular hole 107 for the laser beam to pass through is located at the center of the pressure head body 100. Two oil nozzles 200 are symmetrically installed on the upper section 102 via threaded connections: a coolant inlet nozzle 201 and a coolant outlet nozzle 202, for connecting to external coolant circulation pipes. The pressure head body 100 has a complete liquid cooling flow channel system internally: coolant flows in from the inlet nozzle 201, first entering the vertically downward inlet channel 104 located in the upper section 102, then flowing into the annular channel 105 machined at the bottom of the lower section 103. After circulating within the annular channel 105, the coolant merges into the vertical outlet channel 106 on the other side, and finally flows out from the outlet nozzle 202. This flow channel design ensures that the coolant and the high-temperature lower section 103 of the pressure head have a sufficient and uniform heat exchange area.

[0024] Connecting plates 300 are fixedly mounted on both sides of the middle section 101 of the pressure head body 100 by screws. These plates connect the entire device to an external drive mechanism (such as a cylinder or motor) to achieve the clamping action required for welding. A contact temperature sensor 400 is fixedly mounted on the middle section 101 of the pressure head body 100 by screws and with the aid of thermally conductive silicone. The thermally conductive silicone ensures good heat conduction between the temperature sensor 400 and the pressure head body 100, thereby enabling real-time and accurate monitoring of the temperature changes of the pressure head body during welding, providing data support for process monitoring and optimization.

[0025] During operation, the lower surface of the pressure head body 103 of the device is directly pressed against the manifold 500 to be welded. Simultaneously with laser welding, the coolant circulation system is activated, allowing the lower surface of the pressure head body 101 to directly contact the manifold 500 being welded. Heat exchange occurs through the contact surface, and the coolant flowing through the annular channel 105 rapidly cools the lower surface of the pressure head body 101 during welding, effectively suppressing the temperature rise of both the manifold 500 and the pressure head body 100 itself. This not only ensures the quality of a single weld, preventing damage to components such as the battery terminal seal ring due to overheating, but also prevents heat accumulation within the pressure head and its transfer to subsequent workpieces during continuous welding operations, thereby significantly improving the stability of the welding process and the consistency of the products.

[0026] For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A laser welding press device with liquid cooling heat dissipation structure, characterized in that: It includes a pressure head body (100), at least one liquid cooling interface (200) disposed on the pressure head body (100), and a connection structure (300) disposed on the pressure head body (100); the pressure head body (100) is provided with a cooling channel inside, and the cooling channel is connected to the liquid cooling interface (200).

2. The laser welding press device with liquid cooling heat dissipation structure according to claim 1, characterized in that: The pressure head body (100) has a through hole (107) in the middle for the laser beam to pass through.

3. The laser welding clamping device with a liquid cooling heat dissipation structure according to claim 1, characterized in that: The cooling channel includes an inlet channel (104) and an outlet channel (106) disposed on the upper part of the pressure head body (100) and an annular channel (105) disposed on the lower part of the pressure head body (100), wherein the inlet channel (104) and the outlet channel (106) are connected to the annular channel (105).

4. The laser welding clamping device with a liquid cooling heat dissipation structure according to claim 1, characterized in that: It also includes a temperature sensor (400) disposed on the pressure head body (100).

5. The laser welding clamping device with a liquid cooling heat dissipation structure according to claim 4, characterized in that: The temperature sensor (400) is fixedly connected to the pressure head body (100) via thermally conductive silicone.

6. The laser welding clamping device with a liquid cooling heat dissipation structure according to claim 1, characterized in that: The liquid cooling interface (200) is an oil nozzle and is fixed to the pressure head body (100) by a threaded connection.

7. The laser welding clamping device with a liquid cooling heat dissipation structure according to claim 1, characterized in that: The connecting structure (300) is a connecting plate and is fixed to the pressure head body (100) by fasteners.

8. The laser welding clamping device with a liquid cooling heat dissipation structure according to claim 1, characterized in that: The pressure head body (100) is made of copper.

9. The laser welding clamping device with a liquid cooling heat dissipation structure according to claim 3, characterized in that: The axis of the annular flow channel (105) is parallel to the workpiece to be pressed on the lower surface of the pressure head body (100).

10. The laser welding clamping device with a liquid cooling heat dissipation structure according to any one of claims 1 to 9, characterized in that: The liquid cooling interface (200) includes a coolant inlet and a coolant outlet.

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