A connection structure between the side plate and the water-cooling plate of a power battery module

Abstract

This invention discloses a connection structure between a power battery module side plate and a water-cooling plate, belonging to the field of water cooling heat dissipation. The connection structure includes a base frame, a battery unit fixedly connected to the upper side of the base frame, and multiple water-cooling plate units abutting against the side walls of the battery unit. An expansion plate is fixedly connected to the side wall of the battery unit, and multiple parallel first lead frames are fixedly connected to the expansion plate. Each first lead frame has multiple first wire-passing holes. Multiple second lead frames, arranged parallel to the first lead frames, are fixedly connected to the side of the water-cooling plate unit away from the battery unit. The multiple second lead frames are located at the gaps between the multiple first lead frames. This structure, by setting up tie rod units, multiple first lead frames, and multiple second lead frames, can reduce the stress deformation of the battery unit and the water-cooling plate unit while also providing the advantage of simple assembly and disassembly.

Description

Technical Field

[0001] This invention relates to the field of water cooling, and more specifically, to a connection structure between a power battery module side plate and a water cooling plate. Background Technology

[0002] Power batteries typically generate a significant amount of heat during operation. Therefore, water-cooled plates with good heat dissipation properties are usually used to cool them. The closer the water-cooled plate is to the side plate of the power battery during the heat dissipation process, the better the heat dissipation effect.

[0003] During the installation of the water-cooled plate, the force applied to the connection between the water-cooled plate and the power battery can easily cause stress deformation in both the water-cooled plate and the power battery, resulting in dimensional errors. This can lead to the water-cooled plate and the power battery not fitting tightly together, thus affecting their heat dissipation performance.

[0004] For example, the Chinese patent for the connection structure between the side plate and the water-cooled plate of the power battery module, with authorization announcement number CN211017328U, does not generate heat during production due to its cold working process, and has good consistency in form and position tolerances and dimensional tolerances.

[0005] However, during installation, the area of ​​the connection between the water-cooled plate and the power battery in the above-mentioned patent is small, and the stress of the connection force is concentrated in the connection area. The stress is still relatively large, which can easily cause stress deformation to the water-cooled plate and the power battery.

[0006] Increasing the number of connections increases the area of ​​the connection zone and reduces stress concentration. However, due to the large number of connections, multiple operations are required during installation and disassembly, making the operation more difficult. Summary of the Invention

[0007] 1. Technical problems to be solved

[0008] To address the problems existing in the prior art, the purpose of this invention is to provide a connection structure between the side plate and the water-cooling plate of a power battery module. This structure, by setting up a bracing unit, multiple first lead frames, and multiple second lead frames, can reduce the stress deformation of the battery unit and the water-cooling plate unit while also having the advantage of simple assembly and disassembly.

[0009] 2. Technical Solution

[0010] To solve the above problems, the present invention adopts the following technical solution.

[0011] A power battery module side plate and water-cooling plate connection structure includes a base frame, a battery unit is fixedly connected to the upper side of the base frame, and a plurality of water-cooling plate units that abut against the side wall of the battery unit are also mounted on the upper side of the base frame. An enlarged plate is fixedly connected to the side wall of the battery unit, and a plurality of first lead frames arranged in parallel are fixedly connected to the enlarged plate. A plurality of first wire through holes are opened on the first lead frames.

[0012] The water-cooled plate unit is fixedly connected to a plurality of second wire frames arranged in parallel with the first wire frame on the side away from the battery unit. The plurality of second wire frames are respectively located in the gaps between the plurality of first wire frames. The second wire frames are provided with second wire holes, and the second wire holes are located at the position away from the battery unit from the first wire holes. A tie rod unit is provided between the plurality of first wire holes and second wire holes.

[0013] Furthermore, the tensioning unit includes a tensioner mounted on the base frame and a tensioning rib connected to the tensioner. The end of the tensioning rib away from the tensioner passes through the first wire hole and the second wire hole and is fitted with a locking element.

[0014] Furthermore, both the first and second conductor frames are arranged in two rows. The tensioner includes a motor fixedly connected to the base frame. The output end of the motor is fixedly connected to a winding wheel. A pull hook is fixedly connected to the outer side of the winding wheel. The middle position of the tensioning rib is hung on the enlarged plate.

[0015] Furthermore, the locking component includes a screw cap connected to the end of the tensioning rib. The outer diameter of the screw cap is smaller than the inner diameter of the first and second through holes. A through rod is threaded onto the outer side of the screw cap. The outer diameter of the through rod is larger than the outer diameter of the first and second through holes.

[0016] Furthermore, the first wire frame includes a first wire frame mounted on the enlarged plate, a first rotating wheel is rotatably connected inside the first wire frame, the first wire hole is a first cavity inside the first wire frame and located near the battery cell position of the first rotating wheel, and the inner diameter of the first cavity is larger than the outer diameter of the tension rib and the screw cap and smaller than the outer diameter of the through rod.

[0017] The second lead frame includes a connecting plate fixedly connected to the side of the water-cooled plate unit away from the battery unit. A second wire frame is fixedly connected to the side of the connecting plate away from the water-cooled plate unit. A second rotating wheel is rotatably connected inside the second wire frame. The second wire hole is a second cavity inside the second wire frame and located at the position of the second rotating wheel away from the water-cooled plate unit. The inner diameter of the second cavity is larger than the outer diameter of the tension rib and the screw cap and smaller than the outer diameter of the through rod.

[0018] Furthermore, the enlarged plate is provided with an adjustment unit and multiple extension brackets, the adjustment unit and the extension brackets are connected, and the extension brackets are fixedly connected to the first wire frame.

[0019] Furthermore, the extension bracket includes a guide frame and a screw. The screw is rotatably connected to the enlarged plate, and the guide frame is fixedly connected to the enlarged plate. A slider that is fixedly connected to the first wire frame is horizontally slidably connected to the guide frame, and the slider is also provided with a screw hole that is threadedly connected to the screw.

[0020] Furthermore, the adjustment unit includes a rotating rod rotatably connected to multiple guide frames, one end of the rotating rod is fixedly connected to a knob assembly, multiple worm gears are fixedly connected to the outer side of the rotating rod, and worm wheels that mesh with the worm gears are fixedly connected to the outer side of each of the multiple screws.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the advantages of this invention are:

[0023] (1) By setting up multiple first lead frames and multiple second lead frames, this solution can significantly increase the force-bearing area of ​​the battery unit and the water-cooled plate unit, thereby reducing the force on the battery unit and the water-cooled plate unit at the same position and reducing their stress deformation.

[0024] (2) This solution sets up a tie rod unit to connect and separate multiple first conductor frames and second conductor frames at the same time, which can easily complete the assembly and disassembly of multiple first conductor frames and second conductor frames, and the assembly and disassembly are relatively simple. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a partial structural diagram of the present invention;

[0027] Figure 3 This is a partial top view of the structure of the present invention;

[0028] Figure 4 This is a partial exploded view of the structure of the present invention;

[0029] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0030] Figure 6 This is a partial cross-sectional view of point A in section 4 of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the second conductor frame of the present invention;

[0032] Figure 8 This is a schematic diagram of the tensioner of the present invention;

[0033] Figure 9 This is a schematic diagram of the locking component of the present invention.

[0034] Explanation of the labels in the diagram:

[0035] 1. Base frame; 2. Battery unit; 3. Water-cooled plate unit; 4. Extension bracket; 41. Guide frame; 42. Slider; 43. Screw; 44. Screw hole; 5. Adjustment unit; 51. Knob assembly; 52. Rotating rod; 53. Worm gear; 54. Worm wheel; 6. First wire guide frame; 61. First wire frame; 62. First rotating wheel; 7. Second wire guide frame; 71. Connecting plate; 72. Second wire frame; 73. Second rotating wheel; 8. First wire hole; 9. Second wire hole; 10. Wire tensioner; 101. Motor; 102. Winding wheel; 103. Wire hook; 11. Tensioning rib; 12. Locking component; 121. Screw cap; 122. Through-pin rod; 13. Enlarged plate. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Example 1:

[0038] Please see Figure 1-9 A power battery module side plate and water-cooling plate connection structure includes a base frame 1, a battery unit 2 is fixedly connected to the upper side of the base frame 1, and a plurality of water-cooling plate units 3 that abut against the side wall of the battery unit 2 are also mounted on the upper side of the base frame 1. When the battery unit 2 and the water-cooling plate unit 3 abut against each other, the side wall of the battery unit 2 can be cooled quickly.

[0039] In order to connect the battery unit 2 and the water-cooled plate unit 3 together, an expansion plate 13 is fixedly connected to the side wall of the battery unit 2. Multiple first lead frame 6 arranged in parallel are fixedly connected to the expansion plate 13. Multiple first wire holes 8 are opened on the first lead frame 6. By setting multiple first lead frame 6, the force received when the water-cooled plate unit 3 and the battery unit 2 are connected can be distributed to multiple first lead frame 6, reducing the stress deformation of the side wall of the battery unit 2 due to the large force.

[0040] On the side of the water-cooled plate unit 3 away from the battery unit 2, a plurality of second wire frames 7 are fixedly connected and arranged in parallel with the first wire frame 6. The plurality of second wire frames 7 are located at the gaps between the plurality of first wire frames 6, that is, the second wire frames 7 are arranged between two adjacent first wire frames 6. The second wire frames 7 are provided with second wire holes 9, and the second wire holes 9 are located at the position away from the first wire holes 8. By setting multiple second wire frames 7, the force on the water-cooled plate unit 3 when it is connected to the battery unit 2 can be distributed to the multiple second wire frames 7, reducing the stress deformation of the water-cooled plate unit 3 due to the large force.

[0041] Meanwhile, in order to connect the first wire frame 6 and the second wire frame 7, a tie rod unit is provided between the multiple first wire holes 8 and the second wire holes 9. At this time, the tie rod unit is inserted into the interior of the first wire holes 8 and the second wire holes 9 in sequence, and then the tie rod unit is pulled. The pushing force of the tie rod unit can be used to drive the second wire frame 7 to move towards the battery unit 2, so that the second wire frame 7 drives the water-cooled plate unit 3 and the side wall of the battery unit 2 to abut against each other. This makes the water-cooled plate unit 3 and the battery unit 2 tightly abut against each other, so that the assembly of multiple first wire frames 6 and second wire frames 7 can be completed relatively easily, and the side wall of the battery unit 2 and the water-cooled plate unit 3 can be tightly abutted against each other. Furthermore, the assembly and disassembly can be completed by pulling the tie rod unit out of the interior of the first wire holes 8 and the second wire holes 9. The assembly and disassembly are relatively simple.

[0042] In summary, by setting multiple first lead frame 6 and multiple second lead frame 7, the force-bearing area of ​​the battery unit 2 and the water-cooled plate unit 3 can be significantly increased, thereby reducing the force on the battery unit 2 and the water-cooled plate unit 3 at the same position and reducing their stress deformation. At the same time, by setting the tie rod unit to simultaneously complete the connection and separation of multiple first lead frame 6 and second lead frame 7, the assembly and disassembly of multiple first lead frame 6 and second lead frame 7 can be completed relatively easily, making assembly and disassembly relatively simple.

[0043] Example 2:

[0044] Please see Figure 1-4 and Figure 8-9 As shown, this embodiment discloses the specific structure of the tie rod unit in detail based on embodiment 1. Specifically, the tie rod unit includes a tensioner 10 installed on the base frame 1 and a tensioning rod 11 connected to the tensioner 10. The end of the tensioning rod 11 away from the tensioner 10 passes through the first wire hole 8 and the second wire hole 9 and is equipped with a locking member 12.

[0045] At this time, by pulling the tensioning rib 11 through the tensioner 10, the tensioning rib 11 can pull the second lead frame 7, causing the second lead frame 7 to move the water-cooled plate unit 3 toward the direction closer to the battery unit 2.

[0046] Please also see Figure 2 and Figure 8-9 As shown, the first conductor frame 6 and the second conductor frame 7 are arranged in two rows, which makes the force on the battery unit 2 and the water-cooled plate unit 3 more uniform. Correspondingly, the structure of the tensioner 10 is also improved accordingly. Specifically, the tensioner 10 includes a motor 101 fixedly connected to the base frame 1. The output end of the motor 101 is fixedly connected to a winding wheel 102. A pull hook 103 is fixedly connected to the outer side of the winding wheel 102. The middle position of the tensioning rib 11 is hung on the enlarged plate 13. At this time, the winding wheel 102 can be driven to rotate by starting the motor 101. When the winding wheel 102 rotates, it will wind the tensioning rib 11 through the pull hook 103, so as to pull the two rows of second conductor frames 7 simultaneously. The tensioning rib 11 pulls the two rows of second conductor frames 7 with the same force, which can further reduce their stress deformation error.

[0047] Please refer to Figure 2 and Figure 9 As shown, the locking component 12 includes a screw cap 121 connected to the end of the tensioning rib 11. The outer diameter of the screw cap 121 is smaller than the inner diameter of the first through hole 8 and the second through hole 9. A through rod 122 is threaded to the outer side of the screw cap 121. The outer diameter of the through rod 122 is larger than the outer diameter of the first through hole 8 and the second through hole 9. At this time, after the screw cap 121 passes through the first through hole 8 and the second through hole 9, the end of the tensioning rib 11 can be locked and limited by threading the through rod 122 to the outer side of the screw cap 121.

[0048] Example 3:

[0049] Please see Figure 1-9 As shown, this embodiment discloses in detail the specific structure of the first lead frame 6 and the second connection based on the above embodiment. Specifically, the first lead frame 6 includes a first wire frame 61 mounted on the enlarged plate 13. The first rotating wheel 62 is rotatably connected inside the first wire frame 61. The first wire hole 8 is a first cavity inside the first wire frame 61 and located near the battery unit 2 of the first rotating wheel 62. The inner diameter of the first cavity is larger than the outer diameter of the tension rib 11 and the screw cap 121 and smaller than the outer diameter of the through rod 122. At this time, when the tension rib 11 is inserted into the first wire hole 8, the tension rib 11 will wrap around the outside of the first rotating wheel 62. At this time, when the tension rib 11 is pulled, the rotation of the first rotating wheel 62 will reduce the wear and damage to the tension rib 11.

[0050] Meanwhile, the second lead frame 7 includes a connecting plate 71 fixedly connected to the side of the water-cooled plate unit 3 away from the battery unit 2. The side of the connecting plate 71 away from the water-cooled plate unit 3 is fixedly connected to a second wire frame 72. The interior of the second wire frame 72 is rotatably connected to a second rotating wheel 73. The second wire hole 9 is the interior of the second wire frame 72 and is located in the second cavity away from the water-cooled plate unit 3. The inner diameter of the second cavity is larger than the outer diameter of the tension rib 11 and the screw cap 121 and smaller than the outer diameter of the through rod 122. At this time, when the tension rib 11 is inserted into the interior of the first wire hole 8, the tension rib 11 will wrap around the outside of the second wire frame 72. At this time, when the tension rib 11 is pulled, the rotation of the second wire frame 72 will reduce the wear and damage to the tension rib 11.

[0051] Please see Figure 1-4 As shown, in order to more easily insert the tensioning rib 11 into the first wire hole 8 and the second wire hole 9, the enlarged plate 13 is provided with an adjustment unit 5 and multiple extension brackets 4. The adjustment unit 5 and the extension brackets 4 are connected. The extension brackets 4 can be adjusted by adjusting the adjustment unit 5. The extension brackets 4 are fixedly connected to the first wire frame 61. After the extension brackets 4 are adjusted, the distance between the first wire frame 6 and the enlarged plate 13 will be adjusted until the first wire hole 8 and the second wire hole 9 are opposite each other. At this time, the tensioning rib 11 can be directly inserted through the multiple first wire holes 8 and the second wire holes 9 by a long straight rod, so as to complete the connection between the tensioning rib 11 and the first wire frame 6, i.e. the second wire hole 9, in a relatively simple way, reducing the difficulty of operation.

[0052] For details, please refer to Figure 4-6 As shown, the extension bracket 4 includes a guide frame 41 and a screw 43. The screw 43 is rotatably connected to the enlarged plate 13, and the guide frame 41 is fixedly connected to the enlarged plate 13. A slider 42, which is fixedly connected to the first wire frame 61, is horizontally slidably connected to the guide frame 41. The slider 42 is also provided with a screw hole 44 that is threadedly connected to the screw 43. At this time, by rotating the screw 43, the slider 42 can be driven to move horizontally, and the position of the screw hole 44 can be adjusted, thereby adjusting the position of the first wire hole 8. After the adjustment is completed, it can be locked by the thread between the screw 43 and the screw hole 44.

[0053] The adjustment unit 5 includes a rotating rod 52 rotatably connected to multiple guide frames 41. One end of the rotating rod 52 is fixedly connected to a knob assembly 51. Rotating the knob assembly 51 can drive the rotating rod 52 to rotate. Multiple worm gears 53 are fixedly connected to the outside of the rotating rod 52. The outside of multiple screws 43 is fixedly connected to worm wheels 54 that mesh with the worm gears 53. When the rotating rod 52 rotates, it will drive the worm wheels 54 to rotate through the worm gears 53, providing kinetic energy for the rotation of the screws 43.

[0054] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A connection structure between a side plate and a water-cooled plate of a power battery module, comprising a base frame (1), characterized in that: A battery unit (2) is fixedly connected to the upper side of the base frame (1). A plurality of water-cooled plate units (3) that abut against the side wall of the battery unit (2) are also mounted on the upper side of the base frame (1). An enlarged plate (13) is fixedly connected to the side wall of the battery unit (2). A plurality of first wire guides (6) arranged in parallel are fixedly connected to the enlarged plate (13). A plurality of first wire holes (8) are opened on the first wire guides (6). The water-cooled plate unit (3) is fixedly connected to a plurality of second wire frames (7) arranged in parallel with the first wire frame (6) on the side away from the battery unit (2). The plurality of second wire frames (7) are respectively located in the gaps between the plurality of first wire frames (6). The second wire frames (7) are provided with second wire holes (9), and the second wire holes (9) are located at the position away from the battery unit (2) from the first wire holes (8). A bracing unit is provided between the plurality of first wire holes (8) and second wire holes (9). The tensioning unit includes a tensioner (10) mounted on the base frame (1) and a tensioning rib (11) connected to the tensioner (10). The end of the tensioning rib (11) away from the tensioner (10) passes through the first wire hole (8) and the second wire hole (9) and is fitted with a locking member (12). The first conductor frame (6) and the second conductor frame (7) are arranged in two rows. The tensioner (10) includes a motor (101) fixedly connected to the base frame (1). The output end of the motor (101) is fixedly connected to a winding wheel (102). The outer side of the winding wheel (102) is fixedly connected to a pull hook (103). The middle position of the tensioning rib (11) is hung on the enlarged plate (13).

2. The connection structure between the side plate and the water-cooling plate of a power battery module according to claim 1, characterized in that: The locking member (12) includes a screw cap (121) connected to the end of the tensioning rib (11). The outer diameter of the screw cap (121) is smaller than the inner diameter of the first through hole (8) and the second through hole (9). The screw cap (121) is threaded with a through rod (122) on its outer side. The outer diameter of the through rod (122) is larger than the outer diameter of the first through hole (8) and the second through hole (9).

3. The connection structure between the side plate and the water-cooling plate of a power battery module according to claim 2, characterized in that: The first wire frame (6) includes a first wire frame (61) mounted on the enlarged plate (13). The first wire frame (61) is rotatably connected to a first rotating wheel (62). The first wire hole (8) is a first cavity inside the first wire frame (61) and located near the battery cell (2) of the first rotating wheel (62). The inner diameter of the first cavity is larger than the outer diameter of the tension rib (11) and the screw cap (121) and smaller than the outer diameter of the through rod (122). The second wire frame (7) includes a connecting plate (71) fixedly connected to the side of the water-cooled plate unit (3) away from the battery unit (2). The side of the connecting plate (71) away from the water-cooled plate unit (3) is fixedly connected to a second wire frame (72). The interior of the second wire frame (72) is rotatably connected to a second rotating wheel (73). The second wire hole (9) is a second cavity inside the second wire frame (72) and located at the position of the second rotating wheel (73) away from the water-cooled plate unit (3). The inner diameter of the second cavity is greater than the outer diameter of the tension rib (11) and the screw cap (121) and smaller than the outer diameter of the through rod (122).

4. The connection structure between the side plate and the water-cooling plate of a power battery module according to claim 3, characterized in that: The expansion plate (13) is provided with an adjustment unit (5) and multiple extension brackets (4). The adjustment unit (5) and the extension brackets (4) are connected. The extension brackets (4) are fixedly connected to the first wire frame (61).

5. The connection structure between the side plate and the water-cooling plate of a power battery module according to claim 4, characterized in that: The extension bracket (4) includes a guide frame (41) and a screw (43). The screw (43) is rotatably connected to the enlarged plate (13). The guide frame (41) is fixedly connected to the enlarged plate (13). A slider (42) that is fixedly connected to the first wire frame (61) is horizontally slidably connected to the guide frame (41). The slider (42) is also provided with a screw hole (44) that is threadedly connected to the screw (43).

6. The connection structure between the side plate and the water-cooling plate of a power battery module according to claim 5, characterized in that: The adjustment unit (5) includes a rotating rod (52) rotatably connected to multiple guide frames (41). One end of the rotating rod (52) is fixedly connected to a knob assembly (51). Multiple worm gears (53) are fixedly connected to the outside of the rotating rod (52). The outside of each of the multiple screws (43) is fixedly connected to a worm wheel (54) that meshes with the worm gear (53).

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