Battery pack box body, battery pack and vehicle

Abstract

The utility model provides a battery pack box body, a battery pack and a vehicle, and relates to the technical field of batteries, the battery pack box body comprises a frame, a liquid cooling plate and a protection plate; the frame is provided with an accommodating cavity, and the accommodating cavity is used for accommodating a battery module; the liquid cooling plate comprises a liquid cooling plate body and a protruding part arranged at one end of the liquid cooling plate, the liquid cooling plate body is installed on the frame, the liquid cooling plate body covers the containing cavity, the protruding part is located outside the containing cavity, and a water nozzle of the liquid cooling plate is arranged on the protruding part; the protection plate is arranged on the side, away from the frame, of the liquid cooling plate, and the protection plate is connected with the frame. According to the battery pack box body provided by the utility model, the water nozzle of the liquid cooling plate is positioned outside, so that the occupied space in the battery pack is reduced, a switching water nozzle is not needed, the production cost is reduced, and the problem of battery damage caused by a liquid leakage phenomenon in the battery pack is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack box, a battery pack and a vehicle. Background Art

[0002] As the development of battery cells continues to develop in the direction of high-energy and high-power technologies, higher requirements are placed on the heat dissipation capacity of battery packs. Liquid cooling plates are one of the commonly used heat dissipation methods for battery packs. In related technologies, battery packs that use bottom liquid cooling usually design the inlet and outlet nozzles of the liquid cooling plate inside the battery pack case, and then connect them to the adapter nozzle on the case through a liquid cooling tube with a quick plug. However, this design method requires the use of design space in the battery pack, resulting in insufficient design space in the battery pack. At the same time, adding adapter nozzles and liquid cooling tubes will increase production costs. When there are multiple quick plug designs in the battery pack, when the battery pack is used in a vehicle, it is easy for the quick plugs to loosen under long-term vibration conditions, resulting in coolant leakage, which in turn causes the inside of the battery pack to be soaked and damaged. Utility Model Content

[0003] The embodiments of the utility model provide a battery pack case, a battery pack and a vehicle, wherein the water nozzle of the liquid cooling plate in the battery pack case is located outside, thereby reducing the space occupied in the battery pack, eliminating the need for an adapter water nozzle, reducing production costs, and reducing the problem of battery damage caused by leakage in the battery pack.

[0004] In a first aspect, an embodiment of the utility model provides a battery pack box, including a frame, a liquid cooling plate and a protective plate;

[0005] The frame is provided with a receiving cavity, and the receiving cavity is used to receive the battery module;

[0006] The liquid cooling plate comprises a liquid cooling plate body and a protrusion arranged at one end of the liquid cooling plate body, the liquid cooling plate body is mounted on the frame, the liquid cooling plate body covers the accommodating cavity, the protrusion is located outside the accommodating cavity, and the water nozzle of the liquid cooling plate is arranged on the protrusion;

[0007] The protection plate is arranged on a side of the liquid cooling plate away from the frame, and the protection plate is connected to the frame.

[0008] In some embodiments, the frame includes a frame body and an extension boss located at one end of the frame body; the position of the extension boss corresponds to the position of the protrusion, and the protrusion is connected to the extension boss.

[0009] In some embodiments, the frame body is provided with a mounting step, the mounting step forms a first mounting groove, and the extension boss is provided with a second mounting groove;

[0010] The liquid cooling plate body is installed in the first installation groove, and the protruding part is installed in the second installation groove.

[0011] In some embodiments, a through hole is provided on the extension boss, the water nozzle is inserted into the through hole, and the outer side wall of the water nozzle abuts against the inner side wall of the through hole.

[0012] In some embodiments, a first sealing member is provided on a side of the extension boss close to the protruding part.

[0013] In some embodiments, the battery pack box body further includes an adapter elbow, one end of the adapter elbow is connected to the water nozzle, and the other end is connected to a water inlet pipe or a water outlet pipe.

[0014] In some embodiments, one end of the adapter elbow is inserted into the water nozzle, and the outer side wall of the adapter elbow abuts against the inner side wall of the water nozzle, and a second sealing member is provided on the outer side wall of the adapter elbow.

[0015] In some embodiments, the area of the protection plate is larger than the area of the liquid cooling plate, and the protection plate covers the liquid cooling plate.

[0016] In a second aspect, the present invention provides a battery pack, including the battery pack box body, a battery module and a box cover as described above;

[0017] The battery module is disposed in the battery pack box body; the box cover covers the battery pack box body.

[0018] In a third aspect, the present invention provides a vehicle, including the battery pack as described above.

[0019] Advantageous effects of the embodiments of the present invention:

[0020] In the embodiments of the present invention, the battery pack box body includes a frame, a liquid cooling plate and a protection plate. The accommodation cavity provided in the frame can accommodate the battery module. The liquid cooling plate includes a protruding part located outside the accommodation cavity, and the water nozzle of the liquid cooling plate is provided on the protruding part. The protection plate is disposed on a side of the liquid cooling plate away from the frame and is connected to the frame. Since the water nozzle of the liquid cooling plate is provided on the protruding part located outside the accommodation cavity, the space occupied inside the battery pack is reduced, and there is no need to use an adapter water nozzle for connection, thereby saving the space inside the battery pack and reducing the production cost; since the water nozzle of the liquid cooling plate is located outside, when the battery pack is applied to a vehicle, even if there is a loosening of the quick plug and a liquid leakage occurs, it will not affect the battery module in the accommodation cavity; the liquid cooling plate body and the protection plate together constitute the bottom plate of the battery pack box body, which can improve the protection effect of the battery pack box body and ensure the sealing performance. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0022] Figure 1 It is an exploded structural schematic diagram of a battery pack box body provided by an embodiment of the present utility model;

[0023] Figure 2 is Figure 1 an enlarged view of part A in

[0024] Figure 3 It is a bottom view structural schematic diagram of a frame provided by an embodiment of the present utility model;

[0025] Figure 4 It is a sectional view of a battery pack box body provided by an embodiment of the present utility model;

[0026] Figure 5 Figure 4 an enlarged view of part B in

[0027] Figure 6 It is a three-dimensional structural diagram of an adapter elbow provided by an embodiment of the present utility model;

[0028] Figure 7 It is a three-dimensional structural diagram of an extended boss provided by an embodiment of the present utility model;

[0029] Figure 8 It is a structural schematic diagram of a battery pack provided by the present utility model;

[0030] Figure 9 It is a structural schematic diagram of a vehicle provided by the present utility model.

[0031] Explanation of reference numerals:

[0032] 100, battery pack box body; 1, frame; 11, frame body; 12, extended boss; 121, through hole; 122, first seal; 2, liquid cooling plate; 21, liquid cooling plate body; 22, protruding part; 221, water nozzle; 2211, inlet water nozzle; 2212, outlet water nozzle; 3, protection plate; 4, adapter elbow; 41, second seal; 5, inlet pipe; 6, outlet pipe; 7, battery module; 8, box cover; 200, battery pack; 300, vehicle. Detailed implementation manners

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0034] First, as Figure 1 and 2 As shown, an embodiment of the utility model provides a battery pack box 100, including a frame 1, a liquid cooling plate 2 and a protection plate 3;

[0035] The frame 1 is provided with a receiving cavity, and the receiving cavity is used to receive the battery module 7;

[0036] The liquid cooling plate 2 includes a liquid cooling plate body 21 and a protrusion 22 disposed at one end of the liquid cooling plate body 21, the liquid cooling plate body 21 is mounted on the frame 1, the liquid cooling plate body 21 covers the accommodating cavity, the protrusion 22 is located outside the accommodating cavity, and a water nozzle 221 of the liquid cooling plate 2 is disposed on the protrusion 22;

[0037] The protection plate 3 is disposed on a side of the liquid cooling plate 2 away from the frame 1 , and the protection plate 3 is connected to the frame 1 .

[0038] That is, the frame 1 includes two upper and lower openings, and the liquid cooling plate 2 and the protective plate 3 are connected to the opening below the frame 1 to form a box structure. The liquid cooling plate body 21 of the liquid cooling plate 2 covers the accommodating cavity of the frame 1, and the protrusion 22 protrudes outward and is located outside the accommodating cavity, and the water nozzle 221 of the liquid cooling plate 2 is arranged on the protrusion 22. Since there is no need to set a switching water nozzle in the battery pack case 100, the internal space occupancy is reduced, and the water nozzle 221 can be directly connected to the water inlet pipe 5 and the water outlet pipe 6, which also reduces the use of the switching water nozzle and saves production costs. And because the water nozzle 221 of the liquid cooling plate 2 is located outside the battery pack case 100, when it becomes loose due to vibration, even if leakage occurs, it will not affect the battery module 7 in the battery pack case 100, thereby reducing the probability of damage to the battery pack 200.

[0039] In the embodiment of the present utility model, the liquid cooling plate 2 and the protection plate 3 are arranged on the same side of the frame 1, and the protection plate 3 is arranged on the side of the liquid cooling plate 2 away from the frame 1. Both the liquid cooling plate 2 and the protection plate 3 are connected to the frame 1. On the one hand, the protection plate 3 can protect the liquid cooling plate 2. On the other hand, the liquid cooling plate 2 and the protection plate 3 perform secondary sealing and waterproofing on the frame 1, improving the protection ability.

[0040] In some embodiments, as Figure 3 shown, the frame 1 includes a frame body 11 and an extension boss 12 located at one end of the frame body 11; the position of the extension boss 12 corresponds to the position of the protruding portion 22, and the protruding portion 22 is connected to the extension boss 12.

[0041] The frame 1 includes a frame body 11 and an extension boss 12 located at one end of the frame body 11. The position of the frame body 11 corresponds to the position of the liquid cooling plate body 21, while the position of the extension boss 12 corresponds to the position of the protruding portion 22. The extension boss 12 can protect the protruding portion 22 in the liquid cooling plate 2, preventing the protruding portion 22 from being bumped, deformed or damaged during the transportation and use of the battery pack box body 100.

[0042] The extension boss 12 can be connected to the frame body 11 by welding, or the extension boss 12 and the frame body 11 can be integrally formed.

[0043] Furthermore, as Figure 3 and 7 shown, an installation step is provided on the frame body 11, and the installation step forms a first installation groove. A second installation groove is provided on the extension boss 12;

[0044] The liquid cooling plate body 21 is installed in the first installation groove, and the protruding portion 22 is installed in the second installation groove.

[0045] By respectively providing the first installation groove and the second installation groove for accommodating the liquid cooling plate body 21 and the protruding portion 22 on the frame body 11 and the extension boss 12, the connection stability and tightness between the liquid cooling plate 2 and the frame 1 can be improved. The frame 1 and the liquid cooling plate 2 can be connected by friction stir welding, thereby improving the sealing performance.

[0046] In some embodiments, as Figure 4 、 5 and shown in 7, a through hole 121 is provided on the extension boss 12, and the water nozzle 221 is inserted into the through hole 121, and the outer side wall of the water nozzle 221 abuts against the inner side wall of the through hole 121.

[0047] The through hole 121 provided on the extended boss 12 can fix the water nozzle 221 of the liquid cooling plate 2, thereby providing protection for the liquid cooling plate 2 and preventing damage to the water nozzle 221 caused by bumping during the transfer and operation of the battery pack.

[0048] Further, as Figure 7 shown, a first seal 122 is provided on one side of the extended boss 12 close to the protruding portion 22.

[0049] Exemplarily, on one side of the extended boss 12 close to the protruding portion 22, a sealant is provided in a circumferential direction around the through hole 121. After the water nozzle 221 of the liquid cooling plate 2 is inserted into the through hole 121, the sealant can play a sealing role, thereby preventing external liquid from entering the battery pack housing 100 through the gap between the through hole 121 and the water nozzle 221.

[0050] In some embodiments, as Figure 1 and 5 shown, the battery pack housing 100 further includes an adapter elbow 4. One end of the adapter elbow is connected to the water nozzle 221, and the other end is connected to the water inlet pipe 5 or the water outlet pipe 6.

[0051] By providing the adapter elbow 4, the connection direction between the water nozzle 221 and the water inlet pipe 5 or the water outlet pipe 6 can be changed. When the battery pack 200 is applied to the vehicle 300, it is usually disposed at the bottom of the vehicle 300. Since the vertical space at the bottom of the vehicle 300 is small, directly connecting the water inlet pipe 5 or the water outlet pipe 6 to the water nozzle 221 is likely to cause a problem of insufficient insertion and removal space, resulting in inconvenient connection. However, by means of the adapter elbow 4, the connection direction between the water nozzle 221 and the water inlet pipe 5 or the water outlet pipe 6 can be changed, facilitating the connection between the water nozzle 221 and the water inlet pipe 5 or the water outlet pipe 6. In addition, due to the split structure of the adapter elbow 4 and the extended boss 12, the weight and cost of the extended boss 12 can be reduced.

[0052] Exemplarily, as shown in the figure, the adapter elbow 4 is a right-angle adapter elbow, and by means of the right-angle adapter elbow, the connection between the water inlet pipe 5 and the water outlet pipe 6 and the water nozzle 221 can be changed from a vertical connection to a horizontal connection, significantly improving the convenience of insertion.

[0053] In some embodiments, as Figure 5 and 7 shown, one end of the adapter elbow 4 is inserted into the water nozzle 221, and the outer side wall of the adapter elbow 4 abuts against the inner side wall of the water nozzle 221. A second seal 41 is provided on the outer side wall of the adapter elbow 4.

[0054] It is inserted into the water nozzle 221 through the adapter elbow 4 to improve the connection stability between the adapter elbow 4 and the water nozzle 221. By providing a second seal 41 on the outer wall of the adapter elbow 4, the sealing effect of the connection between the adapter elbow 4 and the water nozzle 221 can be improved, preventing liquid from leaking out at the connection between the adapter elbow 4 and the water nozzle 221.

[0055] Exemplarily, as shown in the figure, two sealing rings are provided on the outer wall at one end of the water nozzle 221 where the adapter elbow 4 is inserted, which can ensure the sealing effect and at the same time facilitate the installation and disassembly of the adapter elbow 4 and the water nozzle 221.

[0056] In some embodiments, such as Figure 1 and 5 shown, the water nozzle 221 includes a water inlet nozzle 2211 and a water outlet nozzle 2212.

[0057] The water inlet nozzle 2211 is used to inject the cooling medium into the liquid cooling plate 2, and the water outlet nozzle 2212 is used to discharge the cooled cooling medium in the liquid cooling plate 2 after heat exchange. Both the water inlet nozzle 2211 and the water outlet nozzle 2212 of the liquid cooling plate 2 are provided on the protruding portion 22, reducing the internal space occupation and the risk caused by liquid leakage. The water inlet nozzle 2211 and the water outlet nozzle 2212 can be respectively connected to the inlet pipe 5 and the outlet pipe 6 to enable the cooling medium to continuously circulate in the liquid cooling plate 2 and improve the cooling effect.

[0058] It should be noted that a liquid cooling flow channel is provided in the liquid cooling plate 2. The water inlet nozzle 2211 and the water outlet nozzle 2212 are respectively connected to both ends of the liquid cooling flow channel. The cooling medium enters the liquid cooling flow channel through the water inlet nozzle 2211. After the cooling medium undergoes heat exchange, it flows out from the other end of the liquid cooling flow channel, enters the water outlet nozzle 2212, and then is discharged from the liquid cooling plate 2 to achieve the purpose of heat exchange.

[0059] In some embodiments, such as Figure 1 shown, the area of the protection plate 3 is larger than the area of the liquid cooling plate 2, and the protection plate 3 covers the liquid cooling plate 2.

[0060] The protection plate 3 covers the periphery of the liquid cooling plate 2, which can improve the protection effect on the liquid cooling plate 2. When the battery pack box 100 is applied to a vehicle, the protection plate 3 is located at the bottom, which can protect the liquid cooling plate 2 above and reduce the risk of liquid leakage caused by damage to the liquid cooling plate 2.

[0061] In some embodiments, the liquid cooling plate 2 is connected to the frame 1 through a first connector, and the protection plate 3 is connected to the frame 1 through a second connector; a third seal is provided between the first connector and the liquid cooling plate 2, and a fourth seal is provided between the second connector and the protection plate 3.

[0062] That is to say, the first connecting piece and the second connecting piece are respectively sealed by the third sealing piece and the fourth sealing piece, which improves the sealing effect of the battery pack box body 100 and further improves the sealing and waterproof performance of the battery pack box body 100.

[0063] In a second aspect, the present utility model provides a battery pack 200, as Figure 8 shown, which includes the battery pack box body 100, the battery module 7 and the box cover 8 as described above;

[0064] The battery module 7 is disposed inside the battery pack box body 100; the box cover 8 is covered on the battery pack box body 100.

[0065] The battery module 7 is accommodated by the battery pack box body 100, and then the box cover 8 is covered on the battery pack box body 100 to form the battery pack 200. The water nozzle 221 of the liquid cooling plate 2 in the battery pack 200 is disposed outside, which reduces the occupation of the internal space, and there is no need to use an adapter water nozzle for connection inside the battery pack box body 100, saving materials and reducing costs. When leakage occurs at the water nozzle 221, it will not affect the battery module 7 inside the battery pack 200. In addition, in the embodiment of the present utility model, the bottom of the battery pack 200 is secondarily protected and sealed by the liquid cooling plate 2 and the protection plate 3, improving the protection and sealing effect.

[0066] In a third aspect, the present utility model provides a vehicle 300, as Figure 9 shown, which includes the battery pack 200 as described above.

[0067] The beneficial effects of the vehicle 300 provided by the present utility model compared with the prior art are basically the same as those of the battery pack 200, and will not be elaborated here.

[0068] The above has introduced the embodiments of the present utility model in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those skilled in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A battery pack box, characterized in that: Including frame, liquid cooling plate and protection plate; The frame is provided with a receiving cavity, and the receiving cavity is used to receive the battery module; The liquid cooling plate comprises a liquid cooling plate body and a protrusion arranged at one end of the liquid cooling plate body, the liquid cooling plate body is mounted on the frame, the liquid cooling plate body covers the accommodating cavity, the protrusion is located outside the accommodating cavity, and the water nozzle of the liquid cooling plate is arranged on the protrusion; The protection plate is arranged on a side of the liquid cooling plate away from the frame, and the protection plate is connected to the frame.

2. The battery pack case according to claim 1, characterized in that: The frame includes a frame body and an extension boss located at one end of the frame body; the position of the extension boss corresponds to the position of the protruding portion, and the protruding portion is connected to the extension boss.

3. The battery pack case according to claim 2, characterized in that: The frame body is provided with a mounting step, the mounting step forms a first mounting groove, and the extending boss is provided with a second mounting groove; The liquid cooling plate body is installed in the first installation groove, and the protrusion is installed in the second installation groove.

4. The battery pack case according to claim 2, characterized in that: The extending boss is provided with a through hole, the water nozzle is inserted into the through hole, and the outer side wall of the water nozzle is in contact with the inner side wall of the through hole.

5. The battery pack case according to claim 4, characterized in that: A first sealing member is disposed on one side of the extension boss close to the protruding portion.

6. The battery pack case according to claim 1, characterized in that: The battery pack box also includes a switching elbow, one end of which is connected to the water nozzle, and the other end of which is connected to a water inlet pipe or a water outlet pipe.

7. The battery pack case according to claim 6, characterized in that: One end of the adapter elbow is plugged into the water nozzle, and the outer wall of the adapter elbow abuts against the inner wall of the water nozzle, and a second sealing member is arranged on the outer wall of the adapter elbow.

8. The battery pack case according to any one of claims 1 to 7, characterized in that: The area of ​​the protection plate is larger than the area of ​​the liquid cooling plate, and the protection plate covers the liquid cooling plate.

9. A battery pack, characterized in that: Comprising a battery pack box, a battery module and a box cover as described in any one of claims 1 to 8; The battery module is arranged in the battery pack box; the box cover is covered on the battery pack box.

10. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 9.

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