Brazing, pressing and fixing device for liquid cooling plate of battery of electric vehicle

Abstract

An electric vehicle battery liquid cooling plate brazing pressing and fixing device is provided with a brazing bracket, a fixing frame, an overturning frame, a spring supporting rod and a spring buffering pressing assembly. The brazing bracket is arranged on a mesh belt of a brazing furnace, and the fixing frame is installed at one end of the brazing bracket. The fixing frame and one end of the overturning frame are assembled in a hinged mode through a pin shaft, and a spring supporting rod is assembled between the fixing frame and the overturning frame. The overturning frame is provided with an overturning frame frame and an overturning frame cross beam, and spring buffering and pressing assemblies are assembled on the overturning frame frame and the overturning frame cross beam. The spring buffering and pressing assemblies are evenly arranged in the direction of the central axis of the turnover frame frame and the central axis of the turnover frame cross beam. Through cooperation of the brazing bracket, the fixing frame, the overturning frame and the spring buffering and pressing assembly, the pressing and fixing effects on the liquid cooling plate workpiece of the electric automobile battery pack are achieved, and the purposes that the liquid cooling plate workpiece is prevented from deforming in the brazing operation process, and the requirement for the flatness of the liquid cooling plate workpiece is met are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, and particularly to a workpiece pressing and fixing device for the brazing operation of an electric vehicle battery liquid cooling plate. Background Art

[0002] As shown in the attached Figure 1 、 Figure 2 A liquid cooling plate 1 of an electric vehicle battery pack includes two parts, namely an upper liquid cooling plate 1-2 and a lower liquid cooling plate 1-1. The lower liquid cooling plate 1-1 is formed with a circuitously penetrating groove by a stamping process. The upper liquid cooling plate 1-2 and the lower liquid cooling plate 1-1 are combined into one by a brazing method to form a fluid channel 1-3 therebetween. The vehicle battery is installed on the upper surface of the liquid cooling plate 1, and the heat generated by the battery during operation can be carried away by the medium flowing through the fluid channel 1-3 to reduce the battery temperature and ensure the reliability of the battery pack operation. At present, the brazing of the liquid cooling plate uses a large-scale protective atmosphere tunnel furnace device and is provided with a mesh belt. The liquid cooling plate workpiece is fixed by a brazing tooling and continuously produced through the mesh belt transmission. The brazing in the furnace mainly includes three processes, namely the heating and temperature rising process, the brazing process, and the cooling and withdrawal process. During the heating and cooling processes, the workpiece is prone to deformation, which has an adverse effect on the flatness of the liquid cooling plate. The flatness of the liquid cooling plate determines its contact condition with the battery. The higher the fitting degree between the liquid cooling plate and the battery, the better the heat exchange effect of the battery, the fewer the amount of thermal conductive adhesive used, and the lower the installation cost. Therefore, the flatness of the liquid cooling plate and the brazing tightness become the key factors for controlling the product quality.

[0003] In the prior art, the brazing operation of the liquid cooling plate usually adopts a single-layer bracket tooling. The liquid cooling plate is placed on the bracket, and the bracket is placed on the mesh belt for transmission, and a ballast is placed on the liquid cooling plate to press and fix it. This traditional pressing and fixing method has the following drawbacks: (1) The ballast has a certain rigidity, and it is difficult to achieve uniform force on the whole liquid cooling plate, and the flatness of the liquid cooling plate cannot be effectively controlled; (2) By manually carrying the ballast, the operator has a large labor intensity and low work efficiency; (3) The weight of the ballast is a fixed value, and it is difficult to match liquid cooling plate workpieces of different specifications, and the versatility is poor; (4) The contact area between the ballast and the liquid cooling plate is large, and it will absorb more heat, making the temperature rising effect of the liquid cooling plate worse, resulting in poor melting of the brazing filler metal and affecting the brazing quality. Content of the Utility Model

[0004] The utility model provides a brazing pressing and fixing device for an electric vehicle battery liquid cooling plate, aiming to realize the pressing and fixing effect on the liquid cooling plate workpiece of the electric vehicle battery pack through the optimized design of the structures of the brazing bracket, the fixing frame, the flipping frame, and the spring buffer pressing component, so as to prevent the liquid cooling plate workpiece from deforming during the brazing operation and meet the flatness requirement of the liquid cooling plate workpiece.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A brazing pressing and fixing device for an electric vehicle battery liquid cooling plate, which is provided with a brazing bracket, a fixing frame, a turning frame, a spring support rod and a spring buffer pressing assembly; the brazing bracket is placed on the mesh belt of the brazing furnace, and a fixing frame is installed at one end of the brazing bracket; one end of the fixing frame is hinged and assembled with one end of the turning frame through a pin shaft, and a spring support rod is assembled between the fixing frame and the turning frame; the turning frame is provided with a turning frame border and a turning frame cross beam, and a spring buffer pressing assembly is assembled on the turning frame border and the turning frame cross beam; several groups of the spring buffer pressing assemblies are arranged at equal intervals along the central axis direction of the turning frame border and the turning frame cross beam.

[0007] For the above-mentioned brazing pressing and fixing device for an electric vehicle battery liquid cooling plate, the spring buffer pressing assembly is composed of a screw rod, a locking nut, a connecting rod, a compression spring and a pressing head; the screw rod is installed in a screw rod assembly hole arranged on the turning frame border and the turning frame cross beam, and is fixedly assembled with the turning frame border or the turning frame cross beam through upper and lower groups of locking nuts, and the lower end of the screw rod is fixedly assembled with the connecting rod; the diameter of the connecting rod is smaller than that of the screw rod, and a pressing head is assembled at the lower end of the connecting rod; the diameter of the pressing head is larger than that of the connecting rod; the compression spring is sleeved outside the connecting rod, and the upper and lower ends respectively abut against the lower end face of the screw rod and the upper end face of the pressing head.

[0008] For the above-mentioned brazing pressing and fixing device for an electric vehicle battery liquid cooling plate, the brazing bracket includes a bracket border, a partition board and a limit stop block; the bracket border is a square frame larger than the shape size of the liquid cooling plate workpiece, and several vertically and horizontally intersecting partition boards are fixedly installed inside the bracket border; the limit stop block is fixed on the bracket border and is located at the two top corner positions of the bracket border at the end far from the fixing frame.

[0009] For the above-mentioned brazing pressing and fixing device for an electric vehicle battery liquid cooling plate, the brazing bracket is further provided with several support rods, and the support rods are arranged between two adjacent groups of longitudinal partition boards and are in a state parallel to the transverse partition board.

[0010] For the above-mentioned brazing pressing and fixing device for an electric vehicle battery liquid cooling plate, the support rod of the brazing bracket is of a round tube structure.

[0011] The utility model provides a brazing pressing and fixing device for an electric vehicle battery liquid cooling plate. It can apply pressure to the liquid cooling plate workpiece by evenly arranging a plurality of spring buffer pressing components, ensuring uniform stress on the workpiece. It can also adjust the pressure on different types of workpieces by selecting the spring specifications in the spring buffer pressing components. In the structure of the utility model, the pressure head of the spring buffer pressing component contacts the workpiece, and the contact area between the two is small, so the heat absorption effect of the pressure head during the brazing heating and temperature rising process is small, which helps to improve the brazing quality. The utility model uses a spring support rod to drive the flipping frame to act, which is convenient to operate and greatly reduces the labor intensity of the operator. To sum up, through the cooperation of the brazing bracket, the fixing frame, the flipping frame and the spring buffer pressing component, the utility model realizes the pressing and fixing effect on the liquid cooling plate workpiece of the electric vehicle battery pack, achieving the purpose of preventing the liquid cooling plate workpiece from deforming during the brazing operation and meeting the flatness requirements of the liquid cooling plate workpiece. Brief Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of an electric vehicle battery liquid cooling plate;

[0013] Figure 2 is Figure 1 the schematic structural diagram of the A-A cross-section in;

[0014] Figure 3 is a schematic diagram of the overall structure of the utility model;

[0015] Figure 4 is Figure 3 the K-direction view of;

[0016] Figure 5 is a schematic structural diagram of the brazing bracket;

[0017] Figure 6 is a schematic assembly structural diagram of the fixing frame, the flipping frame and the spring support rod;

[0018] Figure 7 is a schematic structural diagram of the spring buffer pressing component;

[0019] Figure 8 is a schematic structural diagram of the cooperation between the electric vehicle battery liquid cooling plate workpiece and the utility model.

[0020] Explanation of the meanings of each label in the figure:

[0021] 1 is the liquid cooling plate, 1-1 is the lower piece of the liquid cooling plate, 1-2 is the upper piece of the liquid cooling plate, 1-3 is the fluid channel;

[0022] 2 is the brazing pressing and fixing device for the electric vehicle battery liquid cooling plate

[0023] 2-1 is the brazing bracket, 2-1-1 is the bracket frame, 2-1-2 is the partition plate, 2-1-3 is the support rod, 2-1-4 is the limit stop;

[0024] 2-2 is the flipping frame, 2-2-1 is the flipping frame border, and 2-2-2 is the flipping frame crossbeam;

[0025] 2-3 is the spring buffer pressing assembly, 2-3-1 is the screw, 2-3-2 is the locking nut, 2-3-3 is the compression spring, 2-3-4 is the connecting rod, and 2-3-5 is the pressing head;

[0026] 2-4 is the fixing frame;

[0027] 2-5 is the spring support rod;

[0028] 2-6 is the pin shaft. Specific embodiments

[0029] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] Referring to FIG. 1, Figure 2 , a liquid cooling plate 1 of an electric vehicle battery pack, including a liquid cooling plate upper sheet 1-2 and a liquid cooling plate lower sheet 1-1. The liquid cooling plate lower sheet 1-1 is formed with a circuitous through groove by stamping. The liquid cooling plate upper sheet 1-2 and the liquid cooling plate lower sheet 1-1 are combined into one by brazing method to form a fluid channel 1-3 therebetween. At present, for the brazing operation of the liquid cooling plate 1, a large-scale protective atmosphere tunnel furnace device is used, and a mesh belt is set. The liquid cooling plate workpiece is fixed by a brazing fixture and continuously produced through the mesh belt transmission. The furnace brazing mainly includes three processes, namely, the heating and temperature rising process, the brazing process, and the cooling and withdrawal process. Among them, the workpiece is prone to deformation during the heating and cooling processes, which has an adverse effect on the flatness of the liquid cooling plate. The flatness of the liquid cooling plate determines its contact condition with the battery. The higher the fitting degree between the liquid cooling plate and the battery, the better the heat exchange effect of the battery, the fewer the amount of thermal conductive adhesive used, and the lower the installation cost.

[0031] Referring to Figure 2 、 Figure 3 、 Figure 5In order to prevent the deformation of the liquid cooling plate workpiece during the brazing operation and meet the flatness requirements of the liquid cooling plate workpiece, the utility model provides a liquid cooling plate brazing clamping and fixing device for electric vehicle batteries, the liquid cooling plate brazing clamping and fixing device 2 is provided with a brazing bracket 2-1, a fixing frame 2-4, a flip frame 2-2, a spring support rod 2-5 and a spring buffer clamping assembly 2-3; the brazing bracket 2-1 is placed on the mesh belt of the brazing furnace, and the fixing frame 2-4 is installed at one end of the brazing bracket 2-1; the fixing frame 2-4 and the flip frame 2-2 are connected to each other. One end of the frame 2-2 is hingedly assembled by a pin 2-6, and a spring support rod 2-5 is installed between the fixed frame 2-4 and the flip frame 2-2; the flip frame 2-2 is provided with a flip frame frame 2-2-1 and a flip frame beam 2-2-2, and a spring buffer clamping assembly 2-3 is installed on the flip frame frame 2-2-1 and the flip frame beam 2-2-2; the spring buffer clamping assembly 2-3 is provided with a plurality of groups, which are evenly arranged along the central axis direction of the flip frame frame 2-2-1 and the flip frame beam 2-2-2.

[0032] See Figure 3 、 Figure 5 , the utility model described in the electric vehicle battery liquid cooling plate brazing clamping fixing device, its brazing bracket 2-1 includes a bracket frame 2-1-1, a partition 2-1-2, a limit block 2-1-4 and a support rod; the bracket frame 2-1-1 is a square frame larger than the shape and size of the liquid cooling plate 1 workpiece, and a plurality of criss-crossing partitions 2-1-2 are fixedly installed inside the bracket frame 2-1-1; the limit block 2-1-4 is fixed on the bracket frame 2-1-1, and is located at the two vertex positions of the bracket frame away from one end of the fixing frame 2-4, and the height of the limit block 2-1-1 matches the thickness of the liquid cooling plate 1 and the height size of the spring buffer clamping assembly 2-3; the support rod 2-1-3 is arranged between two adjacent groups of longitudinal partitions 2-1-2, and is parallel to the transverse partition, and the support rod 2-1-3 is a round tube structure.

[0033] See Figure 6 、 Figure 7, in the preferred embodiment of the brazing pressing and fixing device for the electric vehicle battery liquid cooling plate of the present utility model, the spring buffer pressing assembly 2-3 is composed of a screw rod 2-3-1, a locking nut 2-3-2, a connecting rod 2-3-4, a compression spring 2-3-3 and a pressing head 2-3-5; the screw rod 2-3-1 is installed in the screw rod assembly holes provided on the frame border 2-2-1 and the frame cross beam 2-2-2 of the turnover frame, and is fixedly assembled with the frame border 2-2-1 or the frame cross beam 2-2-2 through upper and lower groups of locking nuts 2-3-2, and the lower end of the screw rod 2-3-1 is fixedly assembled with the connecting rod 2-3-4; the diameter dimension of the connecting rod 2-3-4 is smaller than that of the screw rod 2-3-1, and the pressing head 2-3-5 is assembled at the lower end of the connecting rod 2-3-4; the diameter dimension of the pressing head 2-3-5 is larger than that of the connecting rod 2-3-4; the compression spring 2-3-3 is sleeved outside the connecting rod 2-3-4, and the upper and lower ends respectively abut against the lower end face of the screw rod 2-3-1 and the upper end face of the pressing head 2-3-5.

[0034] See Figures 1 to 8 , when the brazing pressing and fixing device for the electric vehicle battery liquid cooling plate of the present utility model is used for the brazing operation of the liquid cooling plate, the brazing pressing and fixing device 2 is moved by the brazing furnace mesh belt and circulates through the transportation line. During brazing loading, the turnover frame 2-2 is driven to turn over by the spring support rod 2-5, so that the turnover frame 2-2 is in an open state; the liquid cooling plate 1 workpiece is placed on the brazing bracket 2-1; the turnover frame 2-2 turns over in the reverse direction to a closed state. At this time, the pressing heads of the multiple spring buffer pressing assemblies 2-3 uniformly arranged on the turnover frame 2-2 press against the liquid cooling plate 1, so that the liquid cooling plate 1 is in a uniformly stressed pressing and fixing state; the liquid cooling plate 1 workpiece is conveyed into the brazing furnace by the brazing furnace mesh belt under the clamping of the brazing pressing and fixing device 2 for brazing. After the brazing furnace, the turnover frame 2-2 is driven to turn over and open by the spring support rod 2-5, and the liquid cooling plate 1 is taken out to complete a working cycle.

Claims

1. A brazing and pressing device for fixing a liquid cooling plate of an electric vehicle battery, characterized in that: The liquid cooling plate brazing pressing and fixing device (2) comprises a brazing bracket (2-1), a fixing frame (2-4), a turning frame (2-2), a spring support rod (2-5) and a spring buffer pressing assembly (2-3); the brazing bracket (2-1) is placed on the mesh belt of the brazing furnace, and the fixing frame (2-4) is installed at one end of the brazing bracket (2-1); the fixing frame (2-4) and one end of the turning frame (2-2) are hingedly assembled through a pin shaft (2-6), and a spring support rod (2-5) is installed between the fixing frame (2-4) and the turning frame (2-2). A spring support rod (2-5) is arranged between the rotating frames (2-2); the turning frame (2-2) is provided with a turning frame frame (2-2-1) and a turning frame cross beam (2-2-2); spring buffer pressing assemblies (2-3) are mounted on the turning frame frame (2-2-1) and the turning frame cross beam (2-2-2); a plurality of groups of the spring buffer pressing assemblies (2-3) are arranged evenly along the central axis direction of the turning frame frame (2-2-1) and the turning frame cross beam (2-2-2).

2. The brazing, pressing and fixing device for liquid cooling plates of electric vehicle batteries according to claim 1 is characterized in that: The spring buffer pressing assembly (2-3) is composed of a screw rod (2-3-1), a locking nut (2-3-2), a connecting rod (2-3-4), a compression spring (2-3-3) and a pressure head (2-3-5); the screw rod (2-3-1) is installed in a screw rod assembly hole provided on the flip frame frame (2-2-1) and the flip frame cross beam (2-2-2), and is fixedly assembled with the flip frame frame (2-2-1) or the flip frame cross beam (2-2-2) by two sets of upper and lower locking nuts (2-3-2); the screw rod (2-3-1) is installed in a screw rod assembly hole provided on the flip frame frame (2-2-1) and the flip frame cross beam (2-2-2) The lower end of the connecting rod (2-3-1) is fixedly assembled with the connecting rod (2-3-4); the diameter of the connecting rod (2-3-4) is smaller than the diameter of the screw rod (2-3-1), and a pressure head (2-3-5) is installed at the lower end of the connecting rod (2-3-4); the diameter of the pressure head (2-3-5) is larger than the diameter of the connecting rod (2-3-4); the compression spring (2-3-3) is sleeved outside the connecting rod (2-3-4), and the upper and lower ends respectively contact the lower end surface of the screw rod (2-3-1) and the upper end surface of the pressure head (2-3-5).

3. The brazing, pressing and fixing device for liquid cooling plates of electric vehicle batteries according to claim 1 or 2, characterized in that: The brazing bracket (2-1) comprises a bracket frame (2-1-1), a partition (2-1-2) and a limit stopper (2-1-4); the bracket frame (2-1-1) is a square frame matching the shape and size of a liquid cooling plate (1) workpiece, and a plurality of crisscrossing partitions (2-1-2) are fixedly installed inside the bracket frame (2-1-1); the limit stopper (2-1-4) is fixed on the bracket frame (2-1-1) and is located at two top corners of the bracket frame away from one end of the fixing frame (2-4).

4. The brazing, pressing and fixing device for liquid cooling plates of electric vehicle batteries according to claim 3 is characterized in that: The brazing bracket (2-1) is also provided with a plurality of support rods (2-1-3), and the support rods (2-1-3) are arranged between two adjacent groups of longitudinal partitions (2-1-2) and are parallel to the transverse partitions.

5. The brazing, pressing and fixing device for liquid cooling plates of electric vehicle batteries according to claim 4 is characterized in that: The support rod (2-1-3) of the brazing bracket (2-1) is a round tube structure.

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