Liquid cooling plate flatness improvement tool and liquid cooling plate

Abstract

The utility model provides a kind of liquid cooling plate flatness improvement tool and liquid cooling plate, it is related to brazing fixture technical field, and liquid cooling plate flatness improvement tool includes chassis, rivet screw, lower clamping plate, upper clamping plate, fastening nut and spring;Rivet screw is fixedly installed on chassis, and threaded end extends towards chassis top surface direction;Rivet screw passes through lower clamping plate and upper clamping plate in turn, and is connected with fastening nut;Lower clamping plate is laid on chassis;Upper clamping plate is located above lower clamping plate, and liquid cooling plate is placed between upper clamping plate and lower clamping plate;Spring is sleeved on rivet screw, and one end of spring is in contact with upper clamping plate, and the other end is in contact with fastening nut.By spring, force is transmitted to upper clamping plate, and then upper clamping plate acts on liquid cooling plate, so that liquid cooling plate receives greater pressure, improves liquid cooling plate flatness before entering tunnel furnace, so that the entire brazing process, cold plate welding gap is guaranteed within 0.2mm, reduces the generation of false welding or even welding phenomenon, improves yield.

Description

Technical Field

[0001] This utility model relates to the field of brazing fixture technology, and in particular to a tooling for improving the flatness of a liquid cooling plate and a liquid cooling plate. Background Technology

[0002] With the gradual popularization of new energy vehicles, the liquid cooling plate in the battery pack is particularly important in terms of the consistent control of cell temperature and the problem of coolant leakage.

[0003] In the existing technology, cold plates are generally placed on a conveyor belt and brazed in a tunnel furnace during the production process. By adjusting the flatness in the tunnel furnace, there is a problem of excessive flatness, which can easily lead to incomplete welding or even failure to weld. Incomplete welding can cause coolant leakage, resulting in short circuits and fires in the battery pack. Excessive flatness also results in poor temperature uniformity of the battery cells. Utility Model Content

[0004] In view of this, the present invention proposes a tooling for improving the flatness of a liquid-cooled plate and a liquid-cooled plate, in order to solve the technical problem mentioned in the background art that the cold plate is generally placed on a conveyor belt for brazing during the production process, which has the problem of excessive flatness, and is prone to incomplete welding or even failure to weld.

[0005] The technical solution of this utility model is implemented as follows: In a first aspect, this utility model provides a tooling for improving the flatness of a liquid cooling plate, including a base frame, rivet screws, a lower clamping plate, an upper clamping plate, a fastening nut, and a spring, wherein: The rivet screw is fixedly installed on the base frame, and the threaded end extends toward the top surface of the base frame; the rivet screw passes through the lower clamping plate and the upper clamping plate in sequence, and is connected to the fastening nut; The lower clamping plate is laid on the base frame; The upper clamping plate is located above the lower clamping plate, and the liquid cooling plate is placed between the upper clamping plate and the lower clamping plate; The spring is sleeved on the rivet screw, with one end of the spring abutting against the upper clamping plate and the other end abutting against the fastening nut.

[0006] Based on the above technical solution, preferably, the rivet screws are provided in two sets, with one set of rivet screws provided on each side of the width direction of the base frame, and the multiple rivet screws in each set of rivet screws are arranged at equal intervals along the length direction of the base frame. It also includes a pressure strip, which is located above the upper clamping plate. One end of the spring abuts against the upper clamping plate, and the other end abuts against the bottom surface of the pressure strip. The rivet screw passes through the pressure strip, and the fastening nut abuts against the top surface of the pressure strip.

[0007] Based on the above technical solution, preferably, it also includes multiple upper support beams, which are arranged parallel to each other along the length of the upper clamping plate. The upper support beams are sleeved on the rivet screws and pressed against the upper clamping plate. The two ends of the spring abut against the upper support beams and the pressure strip, respectively.

[0008] Based on the above technical solutions, preferably, the pressure strip includes a pressure plate and two folded edges. The pressure plate is provided with positioning holes, the rivet bolts pass through the positioning holes, and the two folded edges are respectively located at both ends of the width direction of the pressure plate.

[0009] Based on the above technical solutions, preferably, the base frame includes at least two horizontal frames and multiple lower support beams. The at least two horizontal frames are arranged in parallel, and the multiple lower support beams are erected in parallel on the horizontal frames. The lower support beams are perpendicular to the horizontal frames. The rivet screws are fixedly installed on the lower support beams, and the lower clamping plate is laid on the lower support beams.

[0010] Based on the above technical solutions, preferably, the top surface of the cross frame has two weld beads corresponding to the position of each of the lower support beams, and the lower support beams are engaged between the two weld beads and welded to the cross frame.

[0011] Based on the above technical solutions, preferably, the lower support beam is provided with rivet holes at both ends, and the rivet screw is riveted to the rivet holes.

[0012] Based on the above technical solutions, preferably, the lower clamping plate is provided with a first connecting hole, and the rivet screw passes through the first connecting hole.

[0013] Based on the above technical solutions, preferably, the upper clamping plate is provided with a second connecting hole, and the rivet screw passes through the second connecting hole.

[0014] Secondly, this utility model provides a liquid cooling plate, which is manufactured using the liquid cooling plate flatness improvement tooling as described in the first aspect.

[0015] The liquid cooling plate flatness improvement tooling of this invention has the following advantages over the prior art: (1) The force is transmitted to the upper clamping plate through the spring, and the upper clamping plate then applies the force to the liquid cooling plate, so that the liquid cooling plate is subjected to greater pressure. The flatness of the liquid cooling plate is improved before entering the tunnel furnace by the clamping force of the spring. This ensures that the welding gap of the cold plate is within 0.2mm during the entire brazing process, ensuring the stability of the welding quality of the cold plate, reducing the occurrence of false welding or even failure to weld, and improving the yield rate. (2) The pressure strip is located above the upper clamping plate, one end of the spring abuts against the upper clamping plate, the other end abuts against the bottom surface of the pressure strip, the rivet screw passes through the pressure strip, and the fastening nut abuts against the top surface of the pressure strip, so that the compression size of each spring is equal, making the force area of ​​the liquid cooling plate more uniform and reducing the flatness to meet the welding requirements; (3) Multiple upper support beams are arranged parallel to each other along the length of the upper clamping plate. The upper support beams are sleeved on the rivet screws and pressed against the upper clamping plate. The two ends of the spring abut against the upper support beams and the pressure strip respectively, so that the spring force can be better transmitted to the upper clamping plate, and the pressing force on the upper clamping plate is more uniform and consistent, thus improving reliability. (4) The pressure strip includes a pressure plate and two folded edges. The pressure plate is provided with positioning holes, and the rivet bolts pass through the positioning holes. The two folded edges are respectively set at both ends of the width direction of the pressure plate, which can improve the strength of the pressure plate, prevent the pressure plate from deforming under the torque of the rivet bolts, and improve reliability and stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of the tooling for improving the flatness of the liquid cooling plate according to this utility model; Figure 2 An exploded view of the liquid cooling plate flatness improvement tooling of this utility model; Figure 3 For the present utility model Figure 4 Enlarged view of part A in the middle; Figure 4 This is a schematic diagram of the base frame of this utility model; Figure 5 This is a cross-sectional view of the pressure strip of this utility model.

[0018] Explanation of reference numerals in the attached diagram: 1-base frame, 2-rivet screw, 3-lower clamping plate, 4-upper clamping plate, 5-fastening nut, 6-spring, 7-pressure strip, 8-upper support beam; 100-Liquid Cooling Plate; 11-Horizontal frame, 111-Weld bead, 12-Lower support beam, 121-Rivet hole; 31 - First connecting hole; 41 - Second connecting hole; 71-Pressure plate, 711-Positioning hole, 72-Folded edge; 81 - Mounting hole. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0020] Reference Figures 1-5 As shown, in a first aspect embodiment of this utility model, a fixture for improving the flatness of a liquid cooling plate is provided, comprising a base frame 1, rivet screws 2, a lower clamping plate 3, an upper clamping plate 4, a fastening nut 5, and a spring 6, wherein: The rivet screw 2 is fixedly installed on the base frame 1, and the threaded end extends toward the top surface of the base frame 1; the rivet screw 2 passes through the lower clamping plate 3 and the upper clamping plate 4 in sequence, and is connected to the fastening nut 5; The lower clamping plate 3 is laid on the base frame 1; the lower clamping plate 3 is provided with a first connecting hole 31, and the rivet screw 2 passes through the first connecting hole 31; The upper clamping plate 4 is located above the lower clamping plate 3, and the liquid cooling plate 100 is placed between the upper clamping plate 4 and the lower clamping plate 3; the upper clamping plate 4 is provided with a second connecting hole 41, and the rivet screw 2 passes through the second connecting hole 41; The spring 6 is sleeved on the rivet screw 2, with one end of the spring 6 abutting against the upper clamping plate 4 and the other end abutting against the fastening nut 5.

[0021] The liquid-cooled plate flatness improvement fixture proposed in this embodiment transmits force to the upper clamping plate 4 via spring 6. The upper clamping plate 4 then applies force to the liquid-cooled plate 100, subjecting it to greater pressure. Through the clamping force of spring 6, the flatness of the liquid-cooled plate 100 is improved before entering the tunnel furnace. This ensures that the welding gap of the cold plate is kept within 0.2mm throughout the entire brazing process, guaranteeing the stability of the cold plate welding quality, reducing the occurrence of incomplete welding or even failure to weld, and improving the yield rate.

[0022] In some embodiments, the rivet screws 2 are provided in two sets, with one set of rivet screws 2 provided on each side of the base frame 1 in the width direction. Multiple rivet screws 2 in each set are arranged at equal intervals along the length direction of the base frame 1. To unify the screw-in length of the adjusting nuts 5 in the two sets of rivet screws 2, this embodiment designs the following scheme: the liquid cooling plate flatness improvement fixture also includes a pressure strip 7, which is located above the upper clamping plate 4. One end of the spring 6 abuts against the upper clamping plate 4, and the other end abuts against the bottom surface of the pressure strip 7. The rivet screws 2 pass through the pressure strip 7, and the adjusting nuts 5 abut against the top surface of the pressure strip 7. By positioning the pressure strip 7 above the upper clamping plate 4, and with one end of the spring 6 abutting against the upper clamping plate 4 and the other end abutting against the bottom surface of the pressure strip 7, the compression size of each spring 6 is made equal, resulting in a more uniform force distribution area on the liquid cooling plate 100 and reducing flatness to meet welding requirements.

[0023] In some embodiments, the liquid cooling plate flatness improvement fixture further includes multiple upper support beams 8, which are arranged parallel to each other along the length of the upper clamping plate 4. Each upper support beam 8 is fitted onto the rivet screw 2 and pressed against the upper clamping plate 4. The two ends of the spring 6 abut against the upper support beam 8 and the pressure strip 7, respectively. This arrangement allows the spring force of the spring 6 to be better transmitted to the upper clamping plate 4, resulting in a more uniform and consistent pressing force and improved reliability. Each end of the upper support beam 8 has a mounting hole 81 through which the rivet screw 2 passes, positioning the upper support beam 8 for easy assembly. Simultaneously, the spring 6 abuts against the top surface of the upper support beam 8. The cross-section of the upper support beam 8 is U-shaped, which improves strength and limits the compression of the spring 6, preventing over-compression and failure, thus improving reliability.

[0024] In some embodiments, the pressure strip 7 includes a pressure plate 71 and two flanges 71. The pressure plate 71 has positioning holes 711 through which the rivet bolt passes. The two flanges 71 are respectively located at both ends of the pressure plate 71 in the width direction. The two flanges 71 improve the strength of the pressure plate 71, prevent deformation of the pressure plate 71 under the torque of the rivet bolt 2, and improve reliability and stability.

[0025] In some embodiments, the base frame 1 includes at least two horizontal frames 11 and multiple lower support beams 12. The at least two horizontal frames 11 are arranged in parallel, and the multiple lower support beams 12 are mounted parallel to the horizontal frames 11. The lower support beams 12 are perpendicular to the horizontal frames 11. Rivet screws 2 are fixedly installed on the lower support beams 12, and lower clamping plates 3 are laid on the lower support beams 12. As shown in the figure, the three horizontal frames 11 are arranged in parallel, and the two ends of the lower support beams 12 are aligned with the outer surfaces of the horizontal frames 11 at both ends. This structure forms a cross-shaped base frame 1, resulting in high overall strength of the base frame 1. While providing support, it also provides a better foundation for the rivet screws 2, improving reliability. The lower support beams 12 have an inverted U-shaped cross section and are radially symmetrical to the upper support beams 8.

[0026] In some embodiments, the top surface of the crossbeam 11 has two weld beads 111 corresponding to the positions of each of the lower support beams 12. The lower support beams 12 are engaged between the two weld beads 111 and welded to the crossbeam 11. The weld beads 111 allow for better positioning of the lower support beams 12, ensuring that the top surfaces of multiple lower support beams 12 are on the same plane. This results in a more even surface when the lower clamping plate 3 is placed on the lower support beams 12, thereby reducing the flatness of the liquid cooling plate 100 and meeting welding requirements.

[0027] In some embodiments, the lower support beam 12 is provided with rivet holes 121 at both ends, and the rivet screw 2 is riveted to the rivet holes 121. By providing rivet holes 121, the rivet screw 2 can be riveted to the rivet holes 121 to achieve fixation with the base frame 1, providing a fixed basis for the clamping force of the clamping bolt and the spring 6.

[0028] The working principle of the liquid cooling plate flatness improvement fixture is as follows: the rivet screw 2 is riveted to the rivet hole 121 on the cross frame 11, the lower clamping plate 3 is put on the rivet screw 2 and laid on the lower support beam 12, the liquid cooling plate 100 is placed on the lower clamping plate 3, the upper clamping plate 4 is put on the rivet screw 2 and pressed on the liquid cooling plate 100, the upper support beam 8 is put on the rivet screw 2 and pressed on the upper clamping plate 4, the spring 6 is put on the rivet screw 2 and compressed at both ends between the upper support beam 8 and the pressure strip 7, and then connected to the rivet screw 2 through the fastening nut 5 to press the pressure strip 7 downward. The force is transmitted to the upper clamping plate 4 through the spring 6, and the upper clamping plate 4 then applies the force to the liquid cooling plate 100, so that the liquid cooling plate 100 is subjected to greater pressure. Through the clamping force of the spring 6, the flatness of the liquid cooling plate 100 is improved before entering the tunnel furnace. This ensures that the welding gap of the cold plate is within 0.2mm throughout the entire brazing process, thus ensuring the stability of the welding quality of the cold plate, reducing the occurrence of incomplete welding or even failure to weld, and improving the yield rate.

[0029] Based on the same concept, a second aspect of this utility model proposes a liquid cooling plate 100, which is manufactured using a liquid cooling plate flatness improvement tooling as described in the first aspect embodiment.

[0030] In this embodiment, the liquid cooling plate 100 has a welding gap of less than 0.2mm and a flatness of 0.5 under compression, which is half the flatness of a conventional liquid cooling plate 100. This reduces the amount of adhesive applied by half, lowering the adhesive cost by 50%. The more uniform adhesive application area at the bottom of the battery cell will result in better consistency of the heat transfer path of the cold plate, thus improving the temperature difference of the battery cell and increasing the cycle life of the battery cell.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tooling for improving the flatness of a liquid-cooled plate, characterized in that, Includes a base frame (1), rivet screws (2), a lower clamping plate (3), an upper clamping plate (4), fastening nuts (5), and springs (6), wherein: The rivet screw (2) is fixedly installed on the base frame (1), and the threaded end extends toward the top surface of the base frame (1); the rivet screw (2) passes through the lower clamping plate (3) and the upper clamping plate (4) in sequence, and is connected to the fastening nut (5); The lower clamping plate (3) is laid on the base frame (1); The upper clamping plate (4) is located above the lower clamping plate (3), and the liquid cooling plate (100) is placed between the upper clamping plate (4) and the lower clamping plate (3); The spring (6) is sleeved on the rivet screw (2), with one end of the spring (6) abutting against the upper clamp (4) and the other end abutting against the fastening nut (5).

2. The liquid cooling plate flatness improvement tooling as described in claim 1, characterized in that, The rivet screws (2) are provided in two sets. A set of rivet screws (2) is provided on each side of the base frame (1) in the width direction. The multiple rivet screws (2) in each set of rivet screws (2) are arranged at equal intervals along the length direction of the base frame (1). It also includes a pressure strip (7), which is located above the upper clamping plate (4). One end of the spring (6) abuts against the upper clamping plate (4), and the other end abuts against the bottom surface of the pressure strip (7). The rivet screw (2) passes through the pressure strip (7), and the fastening nut (5) abuts against the top surface of the pressure strip (7).

3. The liquid cooling plate flatness improvement tooling as described in claim 2, characterized in that, It also includes multiple upper support beams (8), which are arranged parallel to each other along the length of the upper clamping plate (4). The upper support beams (8) are sleeved on the rivet screws (2) and pressed against the upper clamping plate (4). The two ends of the spring (6) abut against the upper support beams (8) and the pressure strip (7) respectively.

4. The liquid cooling plate flatness improvement tooling as described in claim 2, characterized in that, The pressure strip (7) includes a pressure plate (71) and two folded edges (72). The pressure plate (71) is provided with a positioning hole (711), and the rivet screw passes through the positioning hole (711). The two folded edges (72) are respectively located at both ends of the width direction of the pressure plate (71).

5. The liquid cooling plate flatness improvement tooling as described in claim 1, characterized in that, The base frame (1) includes at least two cross frames (11) and multiple lower support beams (12). The at least two cross frames (11) are arranged in parallel, and the multiple lower support beams (12) are mounted in parallel on the cross frames (11). The lower support beams (12) are perpendicular to the cross frames (11). The rivet screws (2) are fixedly installed on the lower support beams (12), and the lower clamping plate (3) is laid on the lower support beams (12).

6. The liquid cooling plate flatness improvement tooling as described in claim 5, characterized in that, The top surface of the cross frame (11) is provided with two welds (111) corresponding to the position of each of the lower support beams (12). The lower support beams (12) are positioned between the two welds (111) and are welded to the cross frame (11).

7. The liquid cooling plate flatness improvement tooling as described in claim 5, characterized in that, The lower support beam (12) has rivet holes (121) at both ends, and the rivet screw (2) is riveted to the rivet holes (121).

8. The liquid cooling plate flatness improvement tooling as described in claim 1, characterized in that, The lower clamping plate (3) is provided with a first connecting hole (31), and the rivet screw (2) passes through the first connecting hole (31).

9. The liquid cooling plate flatness improvement tooling as described in claim 1, characterized in that, The upper clamping plate (4) is provided with a second connecting hole (41), and the rivet screw (2) passes through the second connecting hole (41).

10. A liquid-cooled plate (100), characterized in that, The tooling for improving the flatness of the liquid-cooled plate as described in any one of claims 1-9 is used in the manufacturing process.

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