A welding mechanism of a new energy automobile battery module

Abstract

The utility model discloses a new energy automobile battery module's welding mechanism belongs to resistance spot welding machine field, including resistance spot welding machine, the upper and lower both ends of resistance spot welding machine all are fixedly installed with fixed plate, and the outer surface intercommunication of heat dissipation sleeve pipe has first circulation pipe and second circulation pipe, first circulation pipe and second circulation pipe all run through fixed plate, and first circulation pipe and second circulation pipe are away from the end of heat dissipation sleeve pipe all with water tank inside intercommunication, through the cooperation of above -mentioned each device, through water pump and send low temperature coolant into the heat dissipation sleeve pipe of setting in the electrode stem outside, directly absorb electrode stem heat and realize the cooling, improved cooling efficiency, and the cooling liquid of backflow is through the cooling assembly of water tank, and the heat is conducted by the radiating fin, and the heat is taken away by the air flow of radiating fan acceleration, makes the cooling liquid fast cooling and circulates and uses, this can effectively guarantee the electrode stem temperature constant when welding, avoids electrode loss, welding point quality fluctuation and the risk of electric core heat safety.

Description

Technical Field

[0001] This utility model relates to the field of resistance welding machine technology, specifically a welding mechanism for a new energy vehicle battery module. Background Technology

[0002] As a core component of the power system, the welding quality of new energy vehicle battery modules directly determines the safety, consistency and service life of the battery. Resistance welding technology has become the mainstream process for connecting thin plate materials in battery modules due to its advantages such as fast welding speed, controllable cost and mature process. It uses the resistance heat generated by the current flowing through the contact area of ​​the weldment to locally melt the base material and form a reliable weld point or weld seam under pressure.

[0003] However, in the welding process of existing resistance welding machines, the electrodes need to continuously conduct large currents (usually thousands of amperes) and withstand certain pressures. The welding instantaneous increase causes the electrodes (mostly columnar copper alloy structures) to accumulate heat rapidly. Currently, the industry generally uses natural cooling to cool the electrodes, but this method is extremely inefficient. It not only fails to remove the high temperature at the electrode head in time, but also affects the production efficiency.

[0004] Therefore, this utility model provides a welding mechanism for a new energy vehicle battery module to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved This utility model provides a welding mechanism for a new energy vehicle battery module, aiming to solve the problems mentioned in the background art.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a welding mechanism for a new energy vehicle battery module, comprising a resistance welding machine, wherein a first electrode rod and a second electrode rod are provided on the resistance welding machine, and fixed plates are fixedly installed at both the upper and lower ends of the resistance welding machine; heat dissipation sleeves are fixedly installed on the outer surfaces of the first electrode rod and the second electrode rod, and the outer surfaces of the heat dissipation sleeves are connected to a first circulation pipe and a second circulation pipe; the first circulation pipe and the second circulation pipe both penetrate the fixed plate, and the ends of the first circulation pipe and the second circulation pipe away from the heat dissipation sleeve are both connected to the interior of a water tank; the water tank is fixedly connected to the fixed plate, and a water pump is provided on the inner wall of the water tank; the water pump is connected to the first circulation pipe; and a cooling component is provided on the water tank for cooling the coolant in the water tank.

[0007] As a preferred technical solution of this application, the cooling component includes multiple sets of heat dissipation fins fixedly installed on the side wall of the water tank, and a cooling fan is fixedly installed on the side wall of the water tank corresponding to the heat dissipation fins, with the air outlet direction of the cooling fan facing the heat dissipation fins.

[0008] As a preferred technical solution of this application, the water tank is provided with a liquid replenishment port, and a piston is threadedly installed on the liquid replenishment port.

[0009] As a preferred technical solution of this application, the outer surface of the piston is covered with rubber for anti-slip and enhanced sealing.

[0010] As a preferred technical solution of this application, an electronic valve is provided on the second circulation pipe.

[0011] As a preferred technical solution of this application, the outer surface of the heat dissipation sleeve is made of ceramic material and the inner wall is made of copper material.

[0012] (III) Beneficial Effects 1. A water pump delivers low-temperature coolant into a heat dissipation sleeve fitted over the electrode rod, directly absorbing heat from the electrode rod to achieve cooling, thus improving cooling efficiency. The returning coolant passes through the cooling components in the water tank, where heat is conducted by the heat dissipation fins, and the cooling fan accelerates airflow to remove heat, allowing the coolant to cool down quickly and be recycled. This effectively ensures a constant electrode rod temperature during welding, avoiding electrode wear, fluctuations in solder joint quality, and risks to battery cell thermal safety. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the first overall structure of the present invention; Figure 2 This is a schematic diagram of the second overall structure of the present invention; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 5 for Figure 2 Enlarged structural diagram at point B; Figure 6 for Figure 3 Enlarged structural diagram at point C.

[0014] In the diagram: 1. Resistance welding machine; 2. First electrode rod; 21. Second electrode rod; 3. Fixing plate; 4. Water tank; 41. First circulation pipe; 42. Heat dissipation sleeve; 43. Second circulation pipe; 5. Cooling fan; 51. Heat dissipation fins; 6. Liquid inlet; 61. Piston; 7. Electronic valve; 8. Water pump. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model provides a welding mechanism for a new energy vehicle battery module, such as... Figures 1-6 As shown, the system includes a resistance welding machine 1, on which a first electrode rod 2 and a second electrode rod 21 are mounted. Fixing plates 3 are fixedly installed at both the upper and lower ends of the resistance welding machine 1. Heat dissipation sleeves 42 are fixedly installed on the outer surfaces of both the first electrode rod 2 and the second electrode rod 21. A first circulation pipe 41 and a second circulation pipe 43 are connected to the outer surface of the heat dissipation sleeves 42. Both the first circulation pipe 41 and the second circulation pipe 43 penetrate the fixing plate 3, and the ends of the first circulation pipe 41 and the second circulation pipe 43 away from the heat dissipation sleeves 42 are connected to the interior of a water tank 4. The water tank 4 is fixedly connected to the fixing plate 3, and a water pump 8 is installed on the inner wall of the water tank 4. The water pump 8 is connected to the first circulation pipe 41. The water pump 8 drives the coolant to form a closed-loop circulation between the first circulation pipe 41, the heat dissipation sleeve 42, the second circulation pipe 43, and the water tank 4, continuously removing heat from the first electrode rod 2 and the second electrode rod 21, thus improving heat dissipation efficiency. A cooling component is installed on the water tank 4 to cool the coolant inside the water tank 4.

[0017] The cooling component includes multiple sets of heat dissipation fins 51 fixedly installed on the side wall of the water tank 4, and a cooling fan 5 is fixedly installed on the side wall of the water tank 4 corresponding to the heat dissipation fins 51. The air outlet direction of the cooling fan 5 is set towards the heat dissipation fins 51. The multiple sets of heat dissipation fins 51 increase the contact area between the water tank 4 and the air, and accelerate the heat conduction of the coolant. The cooling fan 5 blows air towards the heat dissipation fins 51, further enhancing the air convection heat dissipation, so that the circulating high-temperature coolant is quickly cooled to the set temperature, ensuring the stability of the subsequent cooling effect and avoiding the decrease in the cooling efficiency of the electrode rod due to the increase in coolant temperature.

[0018] The water tank 4 is provided with a coolant inlet 6, which facilitates timely replenishment or replacement of coolant when it is lost, ensuring sufficient coolant in the cooling system. A piston 61 is threaded onto the coolant inlet 6 to prevent coolant from leaking from the coolant inlet 6 during circulation, and to prevent external dust and impurities from entering the water tank 4 and contaminating the coolant.

[0019] The outer surface of piston 61 is covered with rubber for anti-slip and enhanced sealing. The rubber material has good elasticity and can further fill the gap between piston 61 and fluid inlet 6, improve sealing performance, and reduce the risk of coolant evaporation and external contaminant entry.

[0020] The second circulation pipe 43 is equipped with an electronic valve 7. The electronic valve 7 can dynamically adjust the return flow rate of the coolant in the second circulation pipe 43 according to the coolant temperature or welding conditions. When the electrode rod generates a lot of heat, the flow rate can be increased to improve heat dissipation efficiency, and when the heat generation is less, the flow rate can be appropriately reduced to save energy.

[0021] The outer surface of the heat dissipation sleeve 42 is made of ceramic, and the inner wall is made of copper. The copper inner wall has excellent thermal conductivity, which can quickly absorb the heat from the first electrode rod 2 and the second electrode rod 21 and transfer it to the coolant. The ceramic outer surface has good insulation and heat insulation properties, which can prevent the current from leaking out of the electrode rod, and at the same time prevent the heat absorbed by the coolant from being lost to the outside, thereby improving the heat exchange efficiency. It can also protect the heat dissipation sleeve 42 from external environmental corrosion and extend its service life.

[0022] Working principle: When the resistance welding machine 1 performs welding operations on the battery module of a new energy vehicle, the first electrode rod 2 and the second electrode rod 21 generate a large amount of heat due to the continuous conduction of the large welding current. At this time, the cooling process is initiated: the controller of the resistance welding machine 1 starts the water pump 8 in the water tank 4. The water pump 8 pressurizes the low-temperature coolant in the water tank 4 and sends it into the first circulation pipe 41. The coolant is then transported through the first circulation pipe 41 to the heat dissipation sleeve 42 sleeved on the electrode rod. Because the copper inner wall of the heat dissipation sleeve 42 is tightly attached to the outer surface of the electrode rod, it can quickly absorb the heat of the electrode rod, realizing direct cooling of the first electrode rod 2 and the second electrode rod 21. After heat exchange, the high-temperature coolant passes through the second... The coolant flows back through the circulation pipe 43. During the reflux process, the electronic valve 7 on the second circulation pipe 43 can dynamically adjust the flow rate according to the coolant temperature to ensure stable cooling efficiency. After the high-temperature coolant finally flows back to the water tank 4, the cooling components on the side wall of the water tank 4 are activated. Multiple sets of heat dissipation fins 51 conduct heat from the coolant to the air. At the same time, the cooling fan 5 blows air towards the heat dissipation fins 51 to accelerate airflow and remove heat, so that the coolant is quickly cooled to the set temperature. The cooled coolant re-enters the water pump 8 for circulation, forming a closed-loop cooling system that continuously provides stable low-temperature cooling for the electrode rod, ensuring that the electrode rod temperature remains constant during the welding process and avoiding electrode wear, weld quality fluctuations, and cell thermal safety risks caused by high temperature.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A welding mechanism for a new energy vehicle battery module, comprising a resistance welding machine (1), wherein a first electrode rod (2) and a second electrode rod (21) are provided on the resistance welding machine (1), characterized in that: The resistance welding machine (1) is fixedly installed with a fixing plate (3) at both the upper and lower ends. The outer surfaces of the first electrode rod (2) and the second electrode rod (21) are fixedly installed with heat dissipation sleeves (42). The outer surface of the heat dissipation sleeves (42) is connected to the first circulation pipe (41) and the second circulation pipe (43). The first circulation pipe (41) and the second circulation pipe (43) both pass through the fixing plate (3). The ends of the first circulation pipe (41) and the second circulation pipe (43) away from the heat dissipation sleeves (42) are connected to the inside of the water tank (4). The water tank (4) is fixedly connected to the fixing plate (3). The inner wall of the water tank (4) is provided with a water pump (8). The water pump (8) is connected to the first circulation pipe (41). The water tank (4) is equipped with a cooling component for cooling the coolant inside the water tank (4).

2. The welding mechanism of a new energy vehicle battery module according to claim 1, characterized in that: The cooling component includes multiple sets of heat dissipation fins (51) fixedly installed on the side wall of the water tank (4), and a cooling fan (5) is fixedly installed on the side wall of the water tank (4) corresponding to the heat dissipation fins (51), with the air outlet direction of the cooling fan (5) facing the heat dissipation fins (51).

3. The welding mechanism of a new energy vehicle battery module according to claim 1, characterized in that: The water tank (4) is provided with a liquid replenishment port (6), and a piston (61) is threaded onto the liquid replenishment port (6).

4. The welding mechanism for a new energy vehicle battery module according to claim 3, characterized in that: The outer surface of the piston (61) is covered with rubber for anti-slip and enhanced sealing.

5. The welding mechanism of a new energy vehicle battery module according to claim 1, characterized in that: An electronic valve (7) is provided on the second circulation pipe (43).

6. The welding mechanism of a new energy vehicle battery module according to claim 1, characterized in that: The outer surface of the heat dissipation sleeve (42) is made of ceramic, and the inner wall is made of copper.

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