Battery box side beam and water cooling plate welding fixing clamp

Abstract

The utility model discloses battery box body side beam and water cooling plate welding fixed clamp, including frock platform, the middle part of frock platform is equipped with water cooling plate support block, the periphery of water cooling plate support block is equipped with side beam support block, and the peripheral edge distribution of frock platform has the compression device, after the battery box body of waiting for welding installation is installed on the clamp, the compression device is used to the side beam and is used to the downward pressure to restrain side beam deformation, water cooling plate support block is equipped with heating device, and heating device is used to the water cooling plate center area heating in the welding cooling process. The utility model has the beneficial effect that: through the compression device to the side beam and is used to the downward pressure, can effectively restrain the local deformation of side beam in the welding process because of local heating, in addition, the heating device of being equipped with can make to the heating treatment of water cooling plate middle part, avoid the water cooling plate middle part and the peripheral edge temperature difference too big and produce deformation, guarantee the overall dimension accuracy of battery box body.

Description

Technical Field

[0001] This utility model relates to the field of battery box manufacturing technology, specifically to a welding and fixing fixture for the side beam and water-cooled plate of a battery box. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage technologies, the performance and reliability of power batteries, as core energy storage units, are receiving increasing attention. The battery housing, as a key structural component supporting the battery module, not only needs good mechanical strength and sealing performance but also requires efficient thermal management to ensure the battery operates within a suitable temperature range. Currently, most battery housings adopt a structure combining water-cooled plates and side beams, using internal flow channels within the water-cooled plates to achieve efficient heat dissipation or heating of the battery.

[0003] During the manufacturing process of the battery casing, the water-cooled plate and the surrounding beams are typically fixed using friction welding. While this process achieves high connection strength and sealing, the concentrated heat input during welding results in a highly uneven temperature distribution across the entire water-cooled plate. Specifically, the welding area exhibits a higher temperature, while the central region of the water-cooled plate, due to its larger volume and slower heat conduction, is significantly cooler than the surrounding areas. This significant temperature gradient causes uneven thermal stress within the water-cooled plate, leading to structural deformation.

[0004] Especially during the welding process, the middle of the left and right side beams often arches upwards, further exacerbating the overall deformation of the enclosure. This deformation not only affects the flatness and dimensional accuracy of the battery enclosure but may also lead to difficulties in subsequent battery module installation and even affect the contact between the battery and the cooling plate, reducing thermal management efficiency. In long-term use, residual stress may also cause structural fatigue, affecting the enclosure's sealing performance and service life. Utility Model Content

[0005] In view of this, the present invention provides a welding and fixing fixture for the side beam of the battery box and the water-cooling plate, which can prevent deformation of the side beam of the battery box and the water-cooling plate during the welding process and ensure the installation accuracy of the battery pack.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A welding and fixing fixture for a battery box side beam and a water-cooled plate includes a tooling platform. A water-cooled plate support block is provided in the middle of the tooling platform, and a side beam support block is provided around the water-cooled plate support block. The fixture is characterized in that: a clamping device is distributed along the circumferential edge of the tooling platform. After the battery box to be welded is installed on the fixture, the clamping device is used to apply downward pressure to the side beam to suppress deformation of the side beam; a heating device is provided on the water-cooled plate support block. During the welding cooling process, the heating device is used to heat the central area of ​​the water-cooled plate.

[0008] Using the above structure, the downward pressure applied by the clamping device can shape the side beam. In addition, the heating device can heat the middle of the water-cooled plate, avoiding deformation caused by excessive temperature difference, ensuring the overall dimensional accuracy of the battery box, and facilitating normal battery installation.

[0009] Preferably, the top of the water-cooled plate support block is provided with suction cups, which are used to adhere the water-cooled plate to the surface of the water-cooled plate support block. With this structure, the suction cups ensure that the water-cooled plate is tightly attached to the surface of the water-cooled plate support block, thus facilitating better heating of the water-cooled plate. Furthermore, the suction cups can also suppress deformation of the water-cooled plate.

[0010] Preferably, the heating device is an electric heating plate fixedly installed on the top of the water-cooled plate support block, and the suction cup is integrated on the electric heating plate. With this structure, by placing the electric heating plate on the top of the water-cooled plate support block, the heating device can directly contact the water-cooled plate, thereby accelerating the heating of the water-cooled plate. Furthermore, integrating the suction cup on the electric heating plate makes the overall structure more compact.

[0011] Preferably, each of the side beam support blocks is composed of at least three small support blocks, and the top of the side beam support block extending along the length of the tooling platform is an arc shape with the center bulging upwards. With this structure, because the side beam itself has a certain degree of metallic elasticity, when the clamping device separates from the battery box, the side beam can maintain a straight state through its rebound force, thereby ensuring the installation accuracy of the battery pack.

[0012] Preferably, the clamping device is a rotary clamping cylinder, including a cylinder seat mounted on a tooling platform and a rotating rod rotatable relative to the cylinder seat. An extension rod is fixed to the distal end of the rotating rod, and the end of the extension rod away from the rotating rod is used to apply pressure to the side beam. This structure allows for a stable downward pressure on the side beam. Furthermore, using a cylinder as the clamping device offers the advantage of low cost.

[0013] Preferably, a limiting support block is provided in the area between the clamping device and the side beam support block. When the clamping device applies pressure to the side beam, the end of the extension rod near the rotating rod is supported on the limiting support block. With this structure, the rotational stroke of the rotating clamping cylinder can be limited, preventing excessive rotational stroke that could cause deformation of the battery box.

[0014] Preferably, the tooling platform is equipped with a quick positioning assembly, which includes a lifting cylinder mounted on the tooling platform. The cylinder rod end of the lifting cylinder has a supporting plane for supporting the mounting bracket on the side of the side beam. The supporting plane has an upwardly extending positioning pin in its center, which passes through a mounting hole on the mounting bracket. With this structure, the battery box can be quickly positioned and installed on the tooling platform using the quick positioning assembly.

[0015] Preferably, the side beam support block has circumferentially distributed limit rods. This structure allows for the limitation of the battery box's installation position, ensuring accurate installation.

[0016] Preferably, the tooling platform is equipped with a lifting assembly, which includes a lifting cylinder and a lifting block disposed at the end of the cylinder rod of the lifting cylinder. The lifting block is used to support the mounting bracket on the side of the side beam. With this structure, the shaped battery box can be lifted as a whole, facilitating its removal from the tooling platform.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] The battery box side beam and water-cooled plate welding and fixing fixture provided by this utility model applies downward pressure to the side beam through a clamping device, which can effectively suppress local deformation of the side beam caused by local heating during the welding process. During the welding cooling process, the high temperature of the surrounding weld area is conducted towards the center area of ​​the cooling plate, which often leads to uneven temperature field and deformation of the cooling plate. Therefore, by heating the center area of ​​the cooling plate through a heating device, the temperature field of the entire cooling plate can be guaranteed to be uniform, preventing deformation caused by internal cooling and external heating, thereby ensuring the overall dimensional accuracy of the battery box and facilitating normal battery installation. Attached Figure Description

[0019] Figure 1 This is a reference diagram showing the actual usage of the welding fixture;

[0020] Figure 2 This is a schematic diagram of the welding fixture.

[0021] Figure 3 This is a diagram illustrating the layout position of component 7 for quick location;

[0022] Figure 4 To show a partially enlarged view of the structure of the clamping device 4;

[0023] Figure 5 To show a partial enlarged view of the structure of the rapid positioning component 7;

[0024] Figure 6 A schematic diagram illustrating the layout of lifting component 9;

[0025] Figure 7 To show the cross-sectional view of the welding fixture;

[0026] Figure 8 This is a schematic diagram of the structure of the second clamping device 18;

[0027] Figure 9 This is a schematic diagram of the battery housing 10. Detailed Implementation

[0028] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0029] The welding fixture described in this embodiment is mainly for... Figure 9 The battery box 10 shown is composed of a water-cooled plate 10b and side beams 10a distributed around it. The two longer side beams 10a are also fixedly mounted with mounting brackets 10c. Mounting holes 10c1 are distributed on the mounting brackets 10c1. Mounting sleeves are installed in the mounting holes 10c1, which facilitates the fixed installation of the battery box 10 on the vehicle body.

[0030] like Figures 1 to 3 As shown, a welding and fixing fixture for a battery box side beam and a water-cooled plate includes a tooling platform 1. A water-cooled plate support block 2 is provided in the middle of the tooling platform 1, and a side beam support block 3 is provided around the water-cooled plate support block 2. In use, the battery box 10 is upside down on the tooling platform 1, and the side beam 10a of the battery box 10 is supported on the side beam support block 3, while the water-cooled plate 10b of the battery box 10 is supported on the water-cooled plate support block 2. A clamping device 4 is distributed along the circumferential edge of the tooling platform 1, which can apply downward pressure to the side beam 10a. A heating device is also provided on the water-cooled plate support block 2, which can heat the central area of ​​the water-cooled plate 10b during the welding process.

[0031] Based on the above structure, when the battery box 10 is placed upside down on the tooling platform 1, the downward pressure applied by the clamping device 4 can ensure that the whole does not shake during the welding process, thereby ensuring the welding quality. In addition, the clamping device 4 can also suppress the upward deformation of the side beam 10a due to the heating during welding. The heating device can heat the middle part of the water-cooled plate 10b, thereby avoiding a large temperature difference between the middle part of the water-cooled plate 10b and the surrounding edges, which would cause the water-cooled plate 10b to deform.

[0032] In this embodiment, the clamping device 4 is a rotary clamping cylinder. The rotary clamping cylinder can not only provide stable pressure, but also has the advantage of low cost.

[0033] Specifically, such as Figure 4 As shown, the clamping device 4 includes a cylinder seat 4a mounted on the tooling platform 1 and a rotating rod 4b that can rotate relative to the cylinder seat 4a. An extension rod 4c is fixed at the far end of the rotating rod 4b. Based on this structure, driving the rotating rod 4b to rotate relative to the cylinder seat 4a will cause the end of the extension rod 4c away from the rotating rod 4b to apply pressure to the side beam 10a.

[0034] Furthermore, a support base 11 is provided on the circumferential edge of the tooling platform 1, and the cylinder seat 4a is fixedly installed on the support base 11 by a connecting plate 12.

[0035] like Figure 4 As shown, a limiting support block 6 is also fixed in the area between the pressing device 4 and the side beam support block 3. When the extension rod 4c of the pressing device 4 applies pressure to the side beam 10a, the end of the extension rod 4c near the rotating rod 4b can be supported on the limiting support block 6. Through the design of the limiting support block 6, the rotation stroke of each pressing device 4 can be limited, thereby preventing the extension rod 4c from rotating too much and deforming the battery box 10.

[0036] In this embodiment, the support block 6 is fixedly installed on the upper side of the end of the connecting plate 12 near the support base 11.

[0037] like Figure 2 and Figure 3 As shown, suction cups 5 are distributed on the top of the water-cooled plate support block 2. When the battery box 10 is placed on the tooling platform 1, the suction cups 5 can firmly adhere the water-cooled plate 10b to the surface of the water-cooled plate support block 2, which facilitates the heating device to heat it. In addition, the suction force applied to the water-cooled plate 10b by the suction cups 5 can effectively suppress the deformation of the water-cooled plate 10b.

[0038] In this embodiment, the suction cup 5 uses negative pressure to suction air to achieve the adsorption of the water-cooled plate 10b. The bottom of each suction cup 5 is connected to the air pump through an air pipe. In order to facilitate the installation and arrangement of each air pipe, the water-cooled plate support block 2 is fixedly supported on the surface of the tooling platform 1 by the support rod 17. Through the design of the support rod 17, an air pipe installation area a is formed between the water-cooled plate support block 2 and the tooling platform 1.

[0039] like Figure 7 As shown, a connector integrated base 13 is also fixedly installed on the tooling platform 1. One end of the connector integrated base 13 is connected to the air pump, and the other end is connected to the bottom pipe of each suction cup 5. Based on this structure, only one air pump is needed to make each suction cup 5 work, which greatly reduces the investment cost.

[0040] like Figure 7 As shown, the heating device is an electric heating plate 2a fixedly installed on the top of the water-cooled plate support block 2, and the suction cup 5 is integrated on the electric heating plate 2a. This design can ensure that the overall structure is more compact while heating the water-cooled plate 10b faster, thereby avoiding the formation of a large temperature difference between the middle and the circumferential edge of the water-cooled plate 10b, which would cause the water-cooled plate 10b to deform.

[0041] like Figure 3 As shown, each side beam support block 3 is composed of at least three small support blocks 3a. In this embodiment, the side beam support block 3 extending along the length of the tooling platform 1 is composed of four small support blocks 3a. After the four small support blocks 3a are combined, their top is an arc shape with the middle bulging upward. Since the side beam 10a itself has a certain degree of metallic elasticity, when the clamping device 4 is separated from the battery box 10, the side beam 10a can be kept in a straight state by the rebound force, thereby ensuring the installation accuracy of the battery pack.

[0042] like Figure 5 As shown, a quick positioning assembly 7 is provided on the tooling platform 1. The quick positioning assembly includes a lifting cylinder 7a fixedly installed on the tooling platform 1. The cylinder rod end of the lifting cylinder 7a has a support plane 7b, which supports the mounting bracket 10c on the side of the side beam 10a. The middle of the support plane 7b has an upwardly extending positioning pin 7c, which is used to pass through the mounting hole 10c1 on the mounting bracket 10c. In this embodiment, two sets of positioning assemblies 7 are provided, and the two sets of positioning assemblies 7 are diagonally arranged on the tooling platform 1. The positioning assembly 7 facilitates the quick positioning and installation of the battery box 10 on the tooling platform 1. When the battery box 10 is inverted on the tooling platform 1, the lifting cylinder 7a can operate and make the support plane 7b support the top of the mounting bracket 10c, thereby supporting the mounting bracket 10c and preventing the mounting bracket 10c from being deformed by pressure.

[0043] Furthermore, such as Figure 3 As shown, limiting rods 8 are also distributed around the circumference of the side beam support block 3. When the battery box 10 is inverted on the tooling platform 1, the limiting rods 8 can fit tightly against the outer side wall of the battery box 10. With this design, the battery box 10 can be quickly positioned and installed on the tooling platform 1 through the cooperation of the limiting rods 8 and the positioning component 7, thereby improving the overall processing and manufacturing efficiency.

[0044] like Figure 3 and Figure 6 As shown, a lifting assembly 9 is also provided on the tooling platform 1. The lifting assembly 9 includes a lifting cylinder 9a and a lifting block 9b provided at the end of the cylinder rod of the lifting cylinder 9a. The lifting block 9b is used to support the mounting bracket 10c on the side of the side beam 10a. In this embodiment, a total of four sets of lifting assemblies 9 are provided. The four sets of lifting assemblies 9 are symmetrically distributed in pairs on both sides of the tooling platform 1. After the battery box 10 is welded, the lifting assembly 9 can lift the battery box 10 as a whole by pushing the mounting bracket 10c, thereby facilitating the removal of the battery box 10 from the tooling platform 1.

[0045] To ensure that the lifting cylinder 9a remains vertical during the lifting process, linear bearings 14 are installed on both sides of each lifting cylinder 9a on the tooling platform 1. Each linear bearing 14 has a guide rod 15 that can slide up and down. The guide rod 15 is connected to the lifting block 9b by a connecting rod 16.

[0046] In this embodiment, the lifting block 9b has an L-shaped structure, and the bottom and sides of the mounting bracket 10c are supported on the lifting block 9b. With this design, the lifting block 9b can further limit the installation position of the battery box 10, ensuring that the battery box 10 is accurately installed on the tooling platform 1.

[0047] In this embodiment, a second clamping device 18 is also distributed around the tooling platform 1, specifically as follows: Figure 3 , Figure 5 and Figure 8As shown, the second clamping device 18 includes a lifting cylinder seat 18a fixedly mounted on the tooling platform 1. A lifting rod 18b movable up and down is provided in the middle of the lifting cylinder seat 18a. A hinge seat 18c is fixedly provided at the upper end of the lifting rod 18b. A pressure rod 18d is hinged to the hinge seat 18c. A rotating bracket 18e is fixedly mounted on the upper end of the lifting cylinder seat 18a near the battery box 10. A connecting rod 18f is provided between the rotating bracket 18e and the pressure rod 18d. The two ends of the connecting rod 18f are hinged to the rotating bracket 18e and the pressure rod 18d, respectively. Based on this structure, when the lifting rod 18b is driven to move upward, the pressure rod 18d can rotate towards the side of the battery box 10 and finally apply downward pressure to the side beam 10a. By applying downward pressure to the side beam 10a through two different clamping devices, the upward deformation of the side beam 10a due to welding can be further avoided.

[0048] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A welding and fixing fixture for welding side beams and water-cooled plates of a battery box, comprising a tooling platform (1), wherein a water-cooled plate support block (2) is provided in the middle of the tooling platform (1), and a side beam support block (3) is provided circumferentially in the water-cooled plate support block (2), characterized in that: The tooling platform (1) has clamping devices (4) distributed along its circumferential edge. After the battery box to be welded is installed on the fixture, the clamping devices (4) are used to apply downward pressure to the side beam to suppress the deformation of the side beam. The water-cooled plate support block (2) is equipped with a heating device, which is used to heat the central area of ​​the water-cooled plate during the welding cooling process.

2. The battery box side beam and water-cooling plate welding and fixing fixture according to claim 1, characterized in that: The top of the water-cooled plate support block (2) is provided with suction cups (5), which are used to adsorb the water-cooled plate onto the surface of the water-cooled plate support block (2).

3. The battery box side beam and water-cooling plate welding and fixing fixture according to claim 2, characterized in that: The heating device is an electric heating plate (2a) fixedly installed on the top of the water-cooled plate support block (2), and the suction cup (5) is integrated on the electric heating plate (2a).

4. The battery box side beam and water-cooling plate welding and fixing fixture according to claim 1, characterized in that: Each of the aforementioned side beam support blocks (3) is composed of at least three small support blocks (3a), and the top of the side beam support block (3) extending along the length direction of the tooling platform (1) is an arc shape with the middle raised upward.

5. The battery box side beam and water-cooling plate welding and fixing fixture according to claim 1, characterized in that: The clamping device (4) is a rotary clamping cylinder, including a cylinder seat (4a) set on the tooling platform (1) and a rotating rod (4b) that can rotate relative to the cylinder seat (4a). An extension rod (4c) is fixed at the far end of the rotating rod (4b). The end of the extension rod (4c) away from the rotating rod (4b) is used to apply pressure to the side beam.

6. The battery box side beam and water-cooling plate welding and fixing fixture according to claim 5, characterized in that: A limiting support block (6) is provided in the area between the clamping device (4) and the side beam support block (3). When the clamping device (4) applies pressure to the side beam, the end of the extension rod (4c) near the rotating rod (4b) is supported on the limiting support block (6).

7. The battery box side beam and water-cooling plate welding and fixing fixture according to claim 1, characterized in that: The tooling platform (1) is provided with a quick positioning component (7). The quick positioning component includes a lifting cylinder (7a) set on the tooling platform (1). The cylinder rod end of the lifting cylinder (7a) is provided with a support plane (7b). The support plane (7b) is used to support the mounting bracket on the side of the side beam. The middle of the support plane (7b) has an upwardly extending positioning pin (7c). The positioning pin (7c) is used to pass through the mounting hole on the mounting bracket.

8. The battery box side beam and water-cooling plate welding and fixing fixture according to claim 1, characterized in that: The side beam support block (3) has circumferentially distributed limit rods (8).

9. The battery box side beam and water-cooling plate welding and fixing fixture according to claim 1, characterized in that: The tooling platform (1) is provided with a lifting assembly (9), which includes a lifting cylinder (9a) and a lifting block (9b) disposed at the end of the cylinder rod of the lifting cylinder (9a). The lifting block (9b) is used to support the mounting bracket on the side of the side beam.

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