Box body structure with access hole

Abstract

The utility model belongs to the technical field of battery box bodies, and provides a box body structure with an access hole, which comprises a box body, a liquid cooling plate, a maintenance cover plate and a bottom protective plate. An access hole is formed in the bottom of the box body close to the edge; the liquid cooling plate is installed at the bottom of the box body in a sealed mode, and a notch is specially reserved in the position corresponding to the access hole. The maintenance cover plate is detachably installed at the bottom of the box body and can completely cover the maintenance opening. The bottom guard plate is hermetically connected with the bottom of the box body. According to the utility model, the gap is arranged on the liquid cooling plate, and the maintenance cover plate is detachably arranged at the position corresponding to the gap, so that the bottom space of the battery box body is reasonably utilized, the mechanical property requirement can be met, and meanwhile, the liquid cooling plate and the bottom protection plate are hermetically connected with the bottom of the box body, so that double-layer sealing is realized; and various standards related to the environment are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery box body technical field, especially involve a box body structure with access hole. BACKGROUND

[0002] In recent years, battery technology continues to update iteration, the integration of battery system is constantly improved. The application of advanced technologies such as large module, CTP (Cell To Pack, no module battery pack technology), CTB (Cell To Body, battery body integration technology) is increasingly widespread, and the utilization of battery pack internal space is increasingly efficient. In this process, the use of in-pack glue filling process and the design of non-detachable box cover have brought great difficulties to after-sales repair work. Therefore, the box body with access hole emerges as the times require, and the application is increasingly common, but there are many differences in the number and position of the access hole. For example, the maintenance of BMS (battery management system) and BDU (battery distribution unit) often need to open different access holes.

[0003] Due to the limitation of the internal space layout and the overall structure strength of the battery pack, part of the access hole has to be opened at the bottom of the box body. However, the working condition of the bottom of the box body is relatively poor, which requires the access hole to not only meet the strict requirements of mechanical properties, but also meet the environmental related standards. But due to the restriction of space conditions, it is quite challenging to meet both requirements. UTILITY MODEL CONTENTS

[0004] In order to solve the problems in the background art, the utility model provides a box body structure with access hole.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A box body structure with access hole, comprising:

[0007] The bottom of the box body is provided with an access hole;

[0008] The liquid cooling plate is sealingly installed at the bottom of the box body, and is provided with an opening corresponding to the position of the access hole;

[0009] The maintenance cover plate is detachably installed at the bottom of the box body, and is used for covering the access hole;

[0010] The bottom guard plate is sealingly connected with the bottom of the box body, and is located on the surface of the liquid cooling plate away from the box body.

[0011] Preferably, the inner cavity of the box body is provided with a first mounting beam, a second mounting beam, a third mounting beam and a fourth mounting beam;

[0012] The first mounting beam, the second mounting beam and the third mounting beam are parallel to each other and are sequentially and spacedly arranged.

[0013] The fourth mounting beam is located on the center line of the box body and is perpendicular to the first mounting beam, the second mounting beam and the third mounting beam.

[0014] Preferably, the liquid cooling plate is provided with a plurality of rows of holes corresponding to the positions of the first mounting beam, the second mounting beam, the third mounting beam and the fourth mounting beam.

[0015] The rows of holes are matched with flange pull rivet nuts for connecting the liquid cooling plate and the box body.

[0016] The edges of the liquid cooling plate are welded to the box body.

[0017] Preferably, the bottom of the box body is coated with sealant corresponding to the positions of the first mounting beam, the second mounting beam, the third mounting beam and the fourth mounting beam.

[0018] The sealant is used to form a sealant layer after the box body is connected with the liquid cooling plate.

[0019] Preferably, the access hole is arranged between the third mounting beam and the frame of the box body.

[0020] Preferably, the maintenance cover plate is provided with a plurality of first screws.

[0021] Part of the first screws are used to connect the maintenance cover plate and a wire screw sleeve installed in the frame of the box body.

[0022] The remaining first screws are used to connect the maintenance cover plate and the flange pull rivet nut on the third mounting beam.

[0023] Preferably, the maintenance cover plate is further provided with a first sealing ring on the surface facing the access hole.

[0024] Along the circumferential side of the access hole, one end of the first sealing ring is located between the frame of the box body and the maintenance cover plate, and the other end of the first sealing ring is located between the liquid cooling plate installed on the third mounting beam and the maintenance cover plate.

[0025] Preferably, the bottom guard plate is provided with a plurality of second screws.

[0026] The bottom guard plate and the box body are connected through part of the second screws, and a second sealing ring is arranged between the bottom guard plate and the box body.

[0027] Preferably, the bottom guard plate is connected with the flange pull rivet nut through the remaining second screws corresponding to the position of the second mounting beam.

[0028] Preferably, a third sealing ring is arranged between the bottom guard plate and the liquid cooling plate at the connection between the remaining second screw and the flange rivet nut.

[0029] The utility model discloses the beneficial effect:

[0030] 1. The utility model discloses a liquid cooling plate is set up the gap, and the maintenance cover plate is detachably installed in the gap corresponding position, rationally utilizes the bottom space of battery box, can satisfy the mechanical property requirement, adopts liquid cooling plate and bottom guard plate and box bottom sealing connection simultaneously, realizes double -layer sealing, reaches each item standard related with environment.

[0031] 2. The utility model discloses a plurality of mounting beams are set up in the box, can improve the overall strength of the box on one hand, can be screwed between liquid cooling plate and bottom guard plate respectively to the other party, thereby improve the integration of the box, reduce the battery pack dismounting requirement, be convenient for maintenance.

[0032] The other features and advantages of the utility model will be set forth in the subsequent description, and, partially become obvious from the description, or be understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structure indicated in the description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be to the embodiment or prior art description needed to use the drawing a simple introduction, obviously, the following description in the drawing is some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0034] Figure 1 An explosion schematic diagram of the box structure with access hole of the utility model is shown;

[0035] Figure 2 The internal structure schematic diagram of the box of the utility model is shown;

[0036] Figure 3 The access hole sealing structure schematic diagram of the utility model is shown;

[0037] Figure 4 The sealing structure schematic diagram of the middle fixed point of the bottom guard plate of the utility model is shown;

[0038] Figure 5 The distribution diagram of liquid cooling plate and maintenance cover plate is shown.

[0039] In the diagram: 1. Housing; 11. First frame; 12. Second frame; 13. Third frame; 14. First mounting beam; 15. Fourth frame; 16. Second mounting beam; 17. Third mounting beam; 18. Fifth frame; 181. Wire thread insert; 19. Fourth mounting beam; 2. Liquid cooling plate; 3. Limiting thread insert; 4. Maintenance cover plate; 41. First sealing ring; 5. First screw; 6. Second sealing ring; 7. Bottom guard plate; 8. Second screw; 9. Flange rivet nut; 10. Third sealing ring. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] like Figure 1 The diagram shows a cabinet structure with an access port. This structure includes a cabinet 1, a liquid cooling plate 2, a maintenance cover 4, and a bottom protective plate 7. An access port is located near the edge of the bottom of the cabinet 1, allowing for the maintenance of the electronic components inside. The liquid cooling plate 2 is sealed to the bottom of the cabinet 1, with a notch specifically provided at the location of the access port. The maintenance cover 4 is detachably installed at the bottom of the cabinet 1, completely covering the access port. The bottom protective plate 7 is sealed to the bottom of the cabinet 1 and is located on the side of the liquid cooling plate 2 facing away from the cabinet 1, completely covering the entire bottom surface of the cabinet 1, including the liquid cooling plate 2 and the maintenance cover 4.

[0042] like Figure 2 As shown, the box 1 is composed of a base plate, side frames, and beams. Specifically, a first side frame 11, a second side frame 12, a third side frame 13, a fourth side frame 15, and a fifth side frame 18 form an enclosing structure along the edge of the base plate, creating the inner cavity of the box 1. The first side frame 11 and the fifth side frame 18 are located at the two end edges of the base plate. Between the first side frame 11 and the fifth side frame 18, the second side frame 12, the third side frame 13, and the fourth side frame 15 are connected sequentially to form side frames. Two side frames are provided, installed on both sides of the base plate with the first side frame 11 as the center of symmetry. In addition, the second side frame 12 is connected to the first side frame 11, and the fourth side frame 15 is connected to the fifth side frame 18.

[0043] As an optional solution, the included angles between the first border 11 and the second border 12, the second border 12 and the third border 13, the third border 13 and the fourth border 15, and the fourth border 15 and the fifth border 18 are all 90 degrees.

[0044] It should be noted that the above-mentioned each frame of the box 1 adopts a specific profile section, and the frame is locally thickened, wherein the profile section of the fifth frame 18 is thickened as a whole at the bottom, because the liquid cooling plate 2 is fixed on the box 1 by means of friction stir welding + flange pull rivet nut 9, wherein the liquid cooling plate 2 and the box 1 frame profile section are thickened after the stirring welding area to ensure the reliability of the welding.

[0045] Further, in Figure 2 , the inner cavity of the box 1 is provided with a first mounting beam 14, a second mounting beam 16, a third mounting beam 17 and a fourth mounting beam 19. The first mounting beam 14, the second mounting beam 16 and the third mounting beam 17 are parallel to each other and arranged in sequence with a certain interval. The fourth mounting beam 19 is located on the center line of symmetry of the box 1, and is perpendicular to the first mounting beam 14, the second mounting beam 16 and the third mounting beam 17.

[0046] As an optional solution, the first mounting beam 14, the second mounting beam 16 and the third mounting beam 17 are connected to the corresponding fourth frame 15 at both ends, and are parallel to the first frame 11 and the fifth frame 18.

[0047] It should be noted that the mounting beam of the box 1 can improve the overall strength of the box 1, and can also provide a screw mounting position for mounting the liquid cooling plate 2, the bottom guard plate 7 and other structures. In addition, the inside of each mounting beam can be a hollow structure, which is beneficial to save materials and reduce the overall weight of the box 1 as much as possible.

[0048] As an optional solution, the liquid cooling plate 2 is provided with a plurality of rows of holes corresponding to the positions of the first mounting beam 14, the second mounting beam 16, the third mounting beam 17 and the fourth mounting beam 19. These rows of holes can cooperate with the flange pull rivet nut 9 to realize the stable connection of the liquid cooling plate 2 and the box 1. The flange pull rivet nut 9 has high connection strength, which can effectively ensure the reliability of the installation of the liquid cooling plate 2 on the box 1, prevent the connection from loosening due to vibration and other factors during equipment operation, and ensure the stability of the whole system.

[0049] In addition, as shown in Figure 5 , the edge frame position (i.e. the edge position) of the liquid cooling plate 2 is sealed and connected to the box 1 by means of friction stir welding (FSW, Friction Stir Welding). The friction stir welding can form a firm and good sealing performance weld between the liquid cooling plate 2 and the box 1. This sealing connection method not only can effectively prevent the cooling liquid from leaking, but also can improve the sealing performance between the liquid cooling plate 2 and the box 1. At the same time, the maintenance cover plate 4 is installed at Figure 5 the upper right corner position.

[0050] Further, the bottom of the box 1 is coated with sealant at positions corresponding to the first mounting beam 14, the second mounting beam 16, the third mounting beam 17, and the fourth mounting beam 19. When the box 1 is connected to the liquid cooling plate 2, the sealant forms a sealant layer. The sealant layer further enhances the sealing performance of the entire connection part, cooperates with the seal formed by the friction stir welding, and plays a double protection role, which can better prevent foreign matter from entering and ensure that the liquid in the liquid cooling system does not leak, thereby improving the reliability and service life of the entire system.

[0051] As shown in Figure 3 , the access hole is arranged between the third mounting beam 17 and the fifth frame 18 of the box 1. The fifth frame 18 is pre-provided with two rows of matching holes, which can accurately install the limiting sleeve 3 and the steel wire sleeve 181, and provide a positioning and connecting basis for the subsequent installation of the bottom guard plate 7 and the maintenance cover plate 4. The maintenance cover plate 4 is provided with a plurality of first screws 5, part of which is used to connect the maintenance cover plate 4 and the steel wire sleeve 181 mounted in the frame of the box 1. This connection mode makes the installation of the maintenance cover plate 4 at the frame of the box 1 more stable, and facilitates disassembly, so that the access hole can be quickly opened when maintenance is needed. The remaining first screws 5 are used to connect the maintenance cover plate 4 and the flange rivet nut 9 on the third mounting beam 17, further enhancing the firmness of the installation of the maintenance cover plate 4, and ensuring that the maintenance cover plate 4 will not loosen due to vibration and other factors during normal operation of the equipment, thereby ensuring the overall sealing and safety of the equipment.

[0052] As an optional solution, the maintenance cover plate 4 is further provided with a first sealing ring 41 on the surface facing the access hole. The first sealing ring 41 is annular and surrounds the access hole. The first sealing ring 41 is annular and surrounds the access hole. Generally, it is a rectangular annular structure, so along the access hole, one end (the left end of the annular structure) of the first sealing ring 41 is located between the frame of the box 1 and the maintenance cover plate 4, and the other end (the right end of the annular structure) of the first sealing ring 41 is installed between the liquid cooling plate 2 and the maintenance cover plate 4 on the third mounting beam 17. Figure 3 Figure 3

[0053] In combination Figure 1 with Figure 4 ​​It can be seen that the bottom guard plate 7 is equipped with a plurality of second screws 8. This layout design enables the bottom guard plate 7 and the frame of the box body 1 to be tightly connected through part of the second screws 8, and the second sealing ring 6 is arranged between the two, effectively enhancing the sealing performance of the connection, preventing impurities such as liquid or dust from entering, and achieving good protection effect. Further, the bottom guard plate 7 corresponds to the position of the second mounting beam 16, and the remaining second screws 8 are connected with the flange pull rivet nut 9, which greatly improves the stability of the connection between the bottom guard plate 7 and the second mounting beam 16, and guarantees the reliability of the overall structure. In addition, the third sealing ring 10 is arranged between the bottom guard plate 7 and the liquid cooling plate 2 at the connection between the remaining second screws 8 and the flange pull rivet nut 9, further enhancing the sealing performance.

[0054] It should be noted that at the position of the fifth frame 18, the maintenance cover plate 4 and the bottom guard plate 7 correspond to a row of matching holes respectively, wherein the matching holes corresponding to the maintenance cover plate 4 are used to install the steel wire sleeve 181. The matching holes corresponding to the bottom guard plate 7 are located outside the steel wire sleeve 181, and these matching holes can install the limiting sleeve 3, so the bottom guard plate 7 can be connected with the box body 1 installing the limiting sleeve 3 through part of the second screws 8.

[0055] It should be further noted that the bottom of the bottom guard plate 7 corresponding to the first frame 11, the second frame 12, the third frame 13 and the fourth frame 15 can install pull rivet nuts, and then the remaining second screws 8 can cooperate with these pull rivet nuts.

[0056] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A tank structure with an access port, characterized by, The utility model provides a liquid cooling plate and box body sealing structure, including: The bottom of the box body (1) is provided with an access hole; The liquid cooling plate (2) is sealingly installed at the bottom of the box body (1) and is provided with an opening corresponding to the position of the access hole; The maintenance cover plate (4) is detachably installed at the bottom of the box body (1) and is used for covering the access hole; The bottom guard plate (7) is sealingly connected with the bottom of the box body (1) and is located on the surface of the liquid cooling plate (2) away from the box body (1).

2. A tank structure with a manhole according to claim 1, characterized in that, The inner cavity of the box body (1) is provided with a first mounting beam (14), a second mounting beam (16), a third mounting beam (17) and a fourth mounting beam (19); The first mounting beam (14), the second mounting beam (16) and the third mounting beam (17) are parallel to each other and are sequentially and spacedly arranged; The fourth mounting beam (19) is located on the center line of the box body (1) and is perpendicular to the first mounting beam (14), the second mounting beam (16) and the third mounting beam (17).

3. A tank structure with a manhole according to claim 2, characterized in that, The liquid cooling plate (2) is provided with a plurality of rows of holes corresponding to the positions of the first mounting beam (14), the second mounting beam (16), the third mounting beam (17) and the fourth mounting beam (19); The row of holes is matched with a flange pull rivet nut (9), and the flange pull rivet nut (9) is used for connecting the liquid cooling plate (2) and the box body (1); The edge of the liquid cooling plate (2) is welded with the box body (1).

4. A tank structure with a manhole according to claim 3, characterized in that, The bottom of the box body (1) is coated with sealing glue corresponding to the positions of the first mounting beam (14), the second mounting beam (16), the third mounting beam (17) and the fourth mounting beam (19); The sealing glue is used to form a sealing glue layer after the box body (1) is connected with the liquid cooling plate (2).

5. A tank structure with a manhole according to claim 3, characterized in that, The access hole is arranged between the third mounting beam (17) and the frame of the box body (1).

6. A tank structure with a manhole according to claim 5, characterized in that, The maintenance cover plate (4) is provided with a plurality of first screws (5); Part of the first screws (5) are used for connecting the maintenance cover plate (4) and a steel wire screw sleeve (181) installed in the frame of the box body (1); The remaining first screws (5) are used for connecting the maintenance cover plate (4) and the flange pull rivet nut (9) on the third mounting beam (17).

7. A tank structure with a manhole according to claim 6, characterized in that The maintenance cover plate (4) is further provided with a first sealing ring (41) on the surface facing the access hole; Along the circumferential side of the access hole, one end of the first sealing ring (41) is located between the frame of the box body (1) and the maintenance cover plate (4), and the other end of the first sealing ring (41) is located between the liquid cooling plate (2) installed on the third mounting beam (17) and the maintenance cover plate (4).

8. A tank structure with a manhole according to any one of claims 3-7, characterized in that The bottom guard plate (7) is provided with a plurality of second screws (8); The bottom guard plate (7) and the box body (1) are connected through part of the second screws (8), and a second sealing ring (6) is arranged between the bottom guard plate (7) and the box body (1).

9. A tank structure with a manhole according to claim 8, characterized in that, The bottom guard plate (7) is connected with the flange pull rivet nut (9) through the remaining second screws (8) corresponding to the position of the second mounting beam (16).

10. A tank structure with a manhole according to claim 9, characterized in that, A third sealing ring (10) is arranged between the bottom guard plate (7) and the liquid cooling plate (2) at the connection position of the remaining second screws (8) and the flange pull rivet nut (9).

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