Beam structure, battery tray, battery pack and energy storage device

Abstract

The utility model relates to the technical field of batteries, in particular to a beam structure, a battery tray, a battery pack and an energy storage device.The beam structure comprises a beam body and a partition plate, a cavity is formed in the beam body and penetrates through the beam body in the first direction, and the first direction is the length direction of the beam body; the partition plates are arranged in the cavity, penetrate through the cavity in the first direction and are used for dividing the cavity into a plurality of cavities, and flow guide parts are arranged on the partition plates and used for communicating every two adjacent cavities. According to the beam structure, the flow guide part is arranged on the partition plate and can communicate the two adjacent cavities, so that all the cavities are kept communicating, residual liquid in some cavities can flow into the other cavities from the flow guide part, and the residual liquid in all the cavities can be completely discharged within a short time; the potential safety hazard of residual liquid to the battery cell is eliminated, and the safety of the battery pack is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a beam structure, a battery tray, a battery pack and an energy storage device. Background Art

[0002] The battery pack is composed of battery cells, battery trays, cold plates, bottom guard plates and other structures. The battery tray, as the main body that carries the battery cells and other electrical components, has the requirements to ensure mechanical properties and internal cleanliness. If there is residual liquid inside the battery tray, the liquid will flow into the battery cells during vehicle driving, causing a short circuit and the risk of battery explosion.

[0003] In order to remove the black ash produced by welding, the battery tray usually uses ultrasonic water washing, and water enters the cavity of the profile during the cleaning process; in addition, cutting fluid cooling is also used during CNC processing, and the processing time is usually 40min-60min. The battery tray does not have time to discharge the cutting fluid, so it accumulates in the cavity of the profile. The existing battery tray has holes in the local position of the profile to allow the liquid in the cavity to be discharged from the holes, but it can only discharge the liquid in the corresponding cavity, and there is no connection with other cavities. After the side beams of the profile are welded, and the cross beams are welded, the end faces of the profile are tightly fitted, resulting in the inability to effectively and completely discharge all the residual liquid in the cavity in a short period of time. Utility Model Content

[0004] The present application provides a beam structure, a battery tray, a battery pack and an energy storage device to solve the problem in the prior art that residual liquid in all cavities cannot be effectively and completely discharged in a short period of time.

[0005] In one aspect, the present application provides a beam structure, comprising:

[0006] A beam body, wherein a cavity is formed inside the beam body, and the cavity penetrates the beam body along a first direction, where the first direction is the length direction of the beam body;

[0007] The partition is arranged in the cavity and penetrates the cavity along a first direction. The partition is used to divide the cavity into a plurality of cavities. The partition is provided with a guide portion, which is used to connect two adjacent cavities.

[0008] In a possible design, the guide portion is a guide groove, and the guide groove is opened on the partition.

[0009] In a possible design, the guide groove is opened at the end of the partition.

[0010] In a possible design, the guide groove is a right-angle groove, and the inner wall of the right-angle groove includes a first section and a second section. The first section is perpendicular to the first direction, and the second section is perpendicular to the second direction. The second direction is the thickness direction of the beam body.

[0011] In a possible design, the guide groove is a U-shaped groove, and the inner wall of the U-shaped groove includes a third section, a fourth section and a fifth section, the third section is perpendicular to the first direction, and the fourth section and the fifth section are perpendicular to the second direction.

[0012] In a possible design, a drainage hole is provided on the beam body, and the drainage hole is communicated with at least one cavity.

[0013] On the other hand, the present application also provides a battery tray, including a first side beam, a second side beam, a third side beam, a fourth side beam and a middle cross beam, at least one of the first side beam, the second side beam, the third side beam, the fourth side beam and the middle cross beam is a beam structure as described above, the first side beam is arranged opposite to the second side beam, the third side beam is arranged opposite to the fourth side beam, the first side beam has a first end and a second end, the second side beam has a third end and a fourth end, the two ends of the third side beam are respectively connected to the first end and the third end, the two ends of the fourth side beam are respectively connected to the second end and the fourth end, so that the first side beam, the second side beam, the third side beam and the fourth side beam are enclosed to form a frame structure, and the two ends of the middle cross beam are respectively connected to the third side beam and the fourth side beam.

[0014] In a possible design, a through hole is provided at a position on the third side beam and / or the fourth side beam that is connected to the end of the middle cross beam.

[0015] On the other hand, the present application also provides a battery pack, comprising the battery tray as described above.

[0016] On the other hand, the present application also provides an energy storage device, including the battery pack as described above.

[0017] The beneficial effects of this application are as follows:

[0018] The beam structure of the present application has a guide portion on the partition, which can connect two adjacent cavities, so that all the cavities remain connected. Residual liquid in some cavities can flow from the guide portion into other cavities, so that the residual liquid in all cavities can be completely discharged in a short time, which is beneficial to improving the safety of the battery pack.

[0019] The battery tray provided in the present application includes the beam structure in the present application, and therefore also includes all the above-mentioned advantages of the beam structure.

[0020] The battery pack provided in the present application includes the battery tray in the present application, and therefore also includes all the above-mentioned advantages of the battery tray.

[0021] The energy storage device provided in the present application includes the battery pack in the present application, and therefore also includes all the above-mentioned advantages of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A structural schematic diagram of a beam structure provided in one embodiment of the present application;

[0024] Figure 2 for Figure 1 A magnified view of the structure at center A;

[0025] Figure 3 A structural schematic diagram of a beam structure provided in another embodiment of the present application;

[0026] Figure 4 for Figure 3 A magnified view of the structure at B in the middle;

[0027] Figure 5 A schematic diagram of the structure of a battery tray provided in one embodiment of the present application;

[0028] Figure 6 A schematic diagram of a battery tray in a draining state provided in one embodiment of the present application.

[0029] Reference numerals:

[0030] 100, beam body; 110, cavity; 200, partition; 210, cavity; 300, guide part; 310, guide groove; 311, first section; 312, second section; 313, third section; 314, fourth section; 315, fifth section; 400, drainage hole; 510, first side beam; 520, second side beam; 530, third side beam; 540, fourth side beam; 550, middle cross beam. DETAILED DESCRIPTION

[0031] The technical solution of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0032] Combine the following Figure 1-Figure 6, describes a beam structure provided in an embodiment of the present application, including a beam body 100 and a partition 200, a cavity 110 is formed inside the beam body 100, the cavity 110 penetrates the beam body 100 along a first direction, and the first direction is the length direction of the beam body 100; the partition 200 is arranged in the cavity 110, and the partition 200 penetrates the cavity 110 along the first direction, and the partition 200 is used to divide the cavity 110 into a plurality of cavities 210, and a guide portion 300 is arranged on the partition 200, and the guide portion 300 is used to connect two adjacent cavities 210. In some specific embodiments, the beam body 100 is a plate-like structure, the cavity 110 is a rectangular cavity, and penetrates the beam body 100 along the length direction, so that the beam body 100 is a hollow structure, thereby reducing the weight of the beam body 100 while maintaining the structural strength of the beam body 100. In some specific embodiments, the number of partitions 200 is at least one, refer to Figure 1 , Figure 2 As shown, there are four partitions 200, and the four partitions 200 divide the cavity 110 into five cavities 210, and the five cavities 210 are arranged in sequence along the width direction of the beam body 100, and each cavity 210 penetrates the beam body 100 along the length direction of the beam body 100; Figure 3 , Figure 4 As shown, there is one partition 200, and one partition 200 divides the cavity 110 into two cavities 210. The two cavities 210 are arranged in sequence along the width direction of the beam body 100, and each cavity 210 penetrates the beam body 100 along the length direction of the beam body 100. In some specific embodiments, the opposite sides of the partition 200 are respectively connected to the opposite side walls of the cavity 110, and the angle between the partition 200 and the side wall of the cavity 110 can be an acute angle, a right angle, or an obtuse angle. In some specific embodiments, the guide part 300 is a guide hole, a guide channel, or a guide groove 310, and the guide hole, the guide channel, or the guide groove 310 connects two adjacent cavities 210, so that the residual liquid in one cavity 210 can flow into the other cavity 210. Refer to Figure 2 , Figure 4 As shown, the guide portion 300 is a guide groove 310, and the guide groove 310 is opened on the partition 200. Generally, the liquid flows from the high-position cavity 210 to the low-position cavity 210, so that the residual liquid in the high-position cavity 210 can flow into the low-position cavity 210 through the guide groove 310 by adjusting the posture or position of the beam body 100.

[0033] By utilizing the technical solution in the above-mentioned embodiment, a guide portion 300 is provided on the partition 200. The guide portion 300 can connect two adjacent cavities 210, so that all the cavities 210 remain connected. The residual liquid in some cavities 210 can flow from the guide portion 300 into other cavities 210, thereby achieving complete discharge of the residual liquid in all cavities 210 in a short time, which is beneficial to improving the safety of the battery pack.

[0034] Reference Figure 2 , Figure 4 As shown, in some embodiments of the present application, the guide groove 310 is opened at the end of the partition 200. In this way, the guide groove 310 can be processed by cutting the partition 200 from the end of the beam body 100, thereby reducing the processing difficulty of the guide groove 310 and improving the processing efficiency.

[0035] Reference Figure 2 As shown, in some embodiments of the present application, the guide groove 310 is a right-angle groove, and the inner wall of the right-angle groove includes a first section 311 and a second section 312, the first section 311 is perpendicular to the first direction, and the second section 312 is perpendicular to the second direction, and the second direction is the thickness direction of the beam body 100. Specifically, the lengths of the first section 311 and the second section 312 are approximately 8 mm. It should be noted that due to the installation requirements of the battery tray, the end of the beam body 100 will be chamfered at 45 degrees. When the end of the beam body 100 is chamfered, such as when the end of the beam body 100 is chamfered at 45 degrees, the guide groove 310 is generally a right-angle groove. In this way, only two cuts are needed to process a right-angle groove. Specifically: the first cut is performed along the length direction perpendicular to the beam body 100 to obtain a first section 311, and the second cut is performed along the thickness direction perpendicular to the beam body 100 to obtain a second section 312. The first section 311 and the second section 312 are perpendicular to each other, thereby forming a right-angle guide groove 310 on each partition 200.

[0036] Reference Figure 4As shown, in some embodiments of the present application, the guide groove 310 is a U-shaped groove, and the inner wall of the U-shaped groove includes a third section 313, a fourth section 314 and a fifth section 315, the third section 313 is perpendicular to the first direction, and the fourth section 314 and the fifth section 315 are perpendicular to the second direction. Specifically, the lengths of the third section 313 and the fourth section 314 are approximately 5 mm, and the length of the fifth section 315 is approximately 10 mm. It should be noted that when the end of the beam body 100 is a flat end, the guide groove 310 is generally a U-shaped groove, and the processing of the U-shaped groove requires three cutting operations, specifically: the first cutting is performed along a thickness direction perpendicular to the beam body 100 to obtain a third section 313 and a fourth section 314, and the second cutting is performed along a length direction perpendicular to the beam body 100 to obtain a fifth section 315; the third section 313 and the fourth section 314 are arranged opposite to each other, and the fifth section 315 is connected between the third section 313 and the fourth section 314, so that the third section 313, the fourth section 314 and the fifth section 315 together form a U-shaped guide groove 310.

[0037] Reference Figure 1 As shown, in some embodiments of the present application, a drainage hole 400 is provided on the beam body 100, and the drainage hole 400 is connected to at least one cavity 210. In some specific embodiments, the drainage holes 400 are provided at intervals on one side of the beam body 100, and the number of the drainage holes 400 is multiple. Optionally, a group of drainage holes 400 are provided at positions close to both ends of the beam body 100, and when the residual liquid in the cavity 210 is retained at the drainage holes 400, it is discharged from the drainage holes 400. By providing a group of drainage holes 400 at positions close to both ends of the beam body 100, the residual liquid in the high-position cavity 210 can be discharged through the low-position drainage holes 400 by adjusting the posture of the beam body 100.

[0038] Reference Figure 5 As shown, the present application also provides a battery tray, including a first side beam 510, a second side beam 520, a third side beam 530, a fourth side beam 540 and a middle cross beam 550, at least one of the first side beam 510, the second side beam 520, the third side beam 530, the fourth side beam 540 and the middle cross beam 550 is a beam structure as described above, the first side beam 510 is arranged opposite to the second side beam 520, the third side beam 530 is arranged opposite to the fourth side beam 540, the first side beam 510 has a first end and a second end, the second side beam 520 has a third end and a fourth end, the two ends of the third side beam 530 are respectively connected to the first end and the third end, the two ends of the fourth side beam 540 are respectively connected to the second end and the fourth end, so that the first side beam 510, the second side beam 520, the third side beam 530 and the fourth side beam 540 are enclosed to form a frame structure, and the two ends of the middle cross beam 550 are respectively connected to the third side beam 530 and the fourth side beam 540. In one specific embodiment, referring to Figure 5 As shown, the left and right ends of the first side beam 510 and the second side beam 520 are 45-degree chamfered structures, and correspondingly, the guide grooves 310 on the partition 200 at this position are all right-angle grooves; the third side beam 530 and the fourth side beam 540 are not grooved on the partition 200 at the upper and lower ends; the left and right ends of each intermediate cross beam 550 are flat ends, and correspondingly, the guide grooves 310 on the partition 200 at this position are U-shaped grooves; the third side beam 530 and the fourth side beam 540 are respectively provided with through holes at the positions connected to the ends of each intermediate cross beam 550, and the through holes can guide the fluid in the cavity 210 in the intermediate cross beam 550 to the third side beam 530 or the fourth side beam 540.

[0039] The drainage process of the battery tray in this embodiment:

[0040] Reference Figure 6 As shown, the battery tray is tilted about 45 degrees with the tooling so that the left end of the first side beam 510 and the upper end of the third side beam 530 are in a high position, and the right end of the second side beam 520 and the lower end of the fourth side beam 540 are in a low position. In this way, the liquid in the residual cavity 210 will flow from top to bottom in the direction indicated by the arrow in the figure. The specific path is: the liquid in the first side beam 510 flows downward into the fourth side beam 540, the liquid in the third side beam 530 flows downward into the second side beam 520, the liquid in the middle cross beam 550 flows downward into the fourth side beam 540, and finally the liquid gathers to the drainage hole 400 at the bottom corner of the second side beam 520, and the liquid is discharged from the drainage hole 400, thereby effectively and quickly discharging the residual liquid. The problem that the residual liquid cannot be completely discharged from the profile cavity is solved, and the safety hazard of residual liquid to the battery cell is eliminated.

[0041] An embodiment of the present application also provides a battery pack, comprising the battery tray in the above embodiment.

[0042] It should be noted that the battery pack includes a battery tray, which also includes all the advantages of the battery tray mentioned above, which will not be repeated here.

[0043] The present application also provides an energy storage device, including the battery pack in the above embodiment. Specifically, the energy storage device can be a vehicle, an operating machine, etc.

[0044] It should be noted that the energy storage device includes a battery pack, which also includes all the advantages of the battery pack mentioned above, which will not be repeated here.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A beam structure, characterized in that: include: A beam body, wherein a cavity is formed inside the beam body, and the cavity penetrates the beam body along a first direction, wherein the first direction is a length direction of the beam body; A partition is arranged in the cavity and penetrates the cavity along the first direction. The partition is used to divide the cavity into a plurality of cavities. A guide portion is arranged on the partition, and the guide portion is used to connect two adjacent cavities.

2. The beam structure according to claim 1, characterized in that: The guide portion is a guide groove, and the guide groove is arranged on the partition plate.

3. The beam structure according to claim 2, characterized in that: The guide groove is opened at the end of the partition plate.

4. The beam structure according to claim 3, characterized in that: The guide groove is a right-angle groove, and the inner wall of the right-angle groove includes a first section and a second section, the first section is perpendicular to the first direction, the second section is perpendicular to the second direction, and the second direction is the thickness direction of the beam body.

5. The beam structure according to claim 4, characterized in that: The guide groove is a U-shaped groove, and the inner wall of the U-shaped groove includes a third section, a fourth section and a fifth section. The third section is perpendicular to the first direction, and the fourth section and the fifth section are perpendicular to the second direction.

6. The beam structure according to any one of claims 1 to 5, characterized in that: The beam body is provided with a drainage hole, and the drainage hole is communicated with at least one of the cavities.

7. A battery tray, characterized in that: It includes a first side beam, a second side beam, a third side beam, a fourth side beam and a middle cross beam, at least one of the first side beam, the second side beam, the third side beam, the fourth side beam and the middle cross beam is the beam structure according to any one of claims 1 to 6, the first side beam is arranged opposite to the second side beam, the third side beam is arranged opposite to the fourth side beam, the first side beam has a first end and a second end, the second side beam has a third end and a fourth end, the two ends of the third side beam are respectively connected to the first end and the third end, the two ends of the fourth side beam are respectively connected to the second end and the fourth end, so that the first side beam, the second side beam, the third side beam and the fourth side beam are enclosed to form a frame structure, and the two ends of the middle cross beam are respectively connected to the third side beam and the fourth side beam.

8. The battery tray according to claim 7, characterized in that: A through hole is provided at a position on the third side beam and / or the fourth side beam that is connected to the end of the middle cross beam.

9. A battery pack, characterized in that: Comprising the battery tray as described in claim 7 or 8.

10. An energy storage device, characterized in that: A battery pack comprising the battery pack of claim 9.

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