Tray assembly, battery pack and vehicle

Abstract

The utility model relates to a tray assembly, battery pack and vehicle, the tray assembly includes: tray, liquid cooling plate, bottom plate and foaming piece, said liquid cooling plate is installed at the lower end of tray, said bottom plate is installed at the lower end of tray, said liquid cooling plate is provided between tray and said bottom plate, said liquid cooling plate is provided with said foaming piece, said foaming piece is provided with said foaming piece, said foaming piece is provided with said foaming piece. The foaming piece is arranged between the liquid cooling plate and the bottom plate and connected with the liquid cooling plate and the bottom plate, and at least part of the foaming piece is arranged in the circumferential direction of the liquid cooling plate. The tray assembly disclosed by the utility model can improve the structural strength of the battery pack under abuse working conditions such as vibration impact and the like, is better in sealing effect, and is beneficial to reducing the problem of liquid leakage caused by corrosion of the liquid cooling plate.

Description

Technical Field

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

[0002] The battery tray assembly is a key component of the battery pack. The tray assembly includes a tray, a base plate and a liquid cooling plate. The liquid cooling plate is integrated between the bottom of the tray and the floor. In the related art, a buffer structure such as MPP foam is usually designed between the tray and the base plate to improve the structural strength of the battery pack under abuse conditions such as vibration and impact. However, the sealing effect of the tray assembly using the above buffer form is poor, and impurities such as dirt, mud and water can easily enter between the base plate and the liquid cooling plate, and then the bottom of the liquid cooling plate is prone to corrosion and leakage. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the utility model proposes a tray assembly, which can improve the structural strength of the battery pack under abuse conditions such as vibration and impact, and has a good sealing effect, which is beneficial to reducing the problem of corrosion and leakage of the liquid cooling plate.

[0005] An embodiment of the present invention further provides a battery pack.

[0006] An embodiment of the utility model further provides a vehicle.

[0007] The tray assembly of the embodiment of the utility model includes: a tray; a liquid cooling plate, which is installed at the lower end of the tray; a bottom plate, which is installed at the lower end of the tray, and the liquid cooling plate is arranged between the tray and the bottom plate; a foam piece, which is arranged between the liquid cooling plate and the bottom plate and connected to the liquid cooling plate and the bottom plate, and at least part of the foam piece is arranged circumferentially around the liquid cooling plate.

[0008] According to the tray assembly of the embodiment of the utility model, since the foaming part is arranged between the liquid cooling plate and the bottom plate, and the foaming part is connected to the liquid cooling plate and the bottom plate, the liquid cooling plate can be supported under the foaming and expansion of the foaming part, so that the pressure on the liquid cooling plate can be transmitted to the bottom plate through the foaming part, thereby improving the structural strength of the battery pack under abuse conditions such as vibration and impact. In addition, since at least part of the foaming part is arranged circumferentially around the liquid cooling plate, the probability of impurities such as dirt, mud and water entering between the liquid cooling plate and the bottom plate can be reduced, which is conducive to reducing the problem of corrosion and leakage of the liquid cooling plate, and the sealing effect is better.

[0009] In some embodiments, a connecting portion is provided on the liquid cooling plate, the connecting portion is welded to the tray, and the foam part abuts against the connecting portion.

[0010] In some embodiments, in a projection plane orthogonal to the height direction of the tray, an outer peripheral contour of the connecting portion is located within an outer peripheral contour of the foaming member.

[0011] In some embodiments, the width of the connecting portion is L1, the width of the foaming part is L2, and L2 / L1≥1.1.

[0012] In some embodiments, the foaming part includes a potting outer ring and a potting reinforcement segment, the potting outer ring is arranged circumferentially around the liquid cooling plate, there are multiple potting reinforcement segments, and the multiple potting reinforcement segments are arranged at intervals in the potting outer ring.

[0013] In some embodiments, the plurality of potting reinforcement segments extend along a first direction and are connected to the potting outer ring, the plurality of potting reinforcement segments are arranged at intervals along a second direction, and the first direction, the second direction and the height direction of the tray are orthogonal to each other.

[0014] In some embodiments, a sandwich layer is provided between the liquid cooling plate and the bottom plate, and the foamed part is laid flat in the sandwich layer.

[0015] In some embodiments, a first mounting position is provided on the outer edge of the tray, and a second mounting position is provided on the outer edge of the base plate, the first mounting position is abutted against the second mounting position, and the tray assembly also includes a fastener, and the fastener is passed through the first mounting position and the second mounting position.

[0016] A battery pack according to another embodiment of the present invention comprises the tray assembly described in any one of the embodiments of the present invention.

[0017] According to the battery pack of the embodiment of the utility model, since the foaming part is arranged between the liquid cooling plate and the bottom plate, and the foaming part is connected to the liquid cooling plate and the bottom plate, the liquid cooling plate can be supported under the foaming and expansion of the foaming part, so that the pressure on the liquid cooling plate can be transmitted to the bottom plate through the foaming part, thereby improving the structural strength of the battery pack under abuse conditions such as vibration and impact. In addition, since at least part of the foaming part is arranged circumferentially around the liquid cooling plate, the probability of impurities such as dirt, mud and water entering between the liquid cooling plate and the bottom plate can be reduced, which is conducive to reducing the problem of corrosion and leakage of the liquid cooling plate, and the sealing effect is better.

[0018] A vehicle according to another embodiment of the utility model comprises the tray assembly or the battery pack described in any one of the embodiments of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded view of a tray assembly according to an embodiment of the present utility model.

[0020] Figure 2 It is an exploded view of a tray assembly according to another embodiment of the utility model.

[0021] Figure 3 It is a partial view of a tray assembly according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] 1. Pallet;

[0024] 2. Liquid cooling plate; 21. Connection part;

[0025] 3. Bottom plate; 31. Interlayer;

[0026] 4. Foamed parts; 41. Potting outer ring; 42. Potting reinforcement section. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0028] Please refer to the following Figures 1 to 3 A tray assembly, a battery pack and a vehicle according to embodiments of the present invention are described.

[0029] like Figures 1 to 3 As shown, the tray assembly according to the embodiment of the utility model includes: a tray 1, a liquid cooling plate 2, a bottom plate 3 and a foaming member 4. The liquid cooling plate 2 is installed at the lower end of the tray 1, the bottom plate 3 is installed at the lower end of the tray 1, the liquid cooling plate 2 is arranged between the tray 1 and the bottom plate 3, the foaming member 4 is arranged between the liquid cooling plate 2 and the bottom plate 3, and the foaming member 4 is connected to the liquid cooling plate 2 and the bottom plate 3, and at least part of the foaming member 4 is arranged around the circumference of the liquid cooling plate 2.

[0030] According to the tray assembly of the embodiment of the utility model, since the foaming member 4 is disposed between the liquid cooling plate 2 and the bottom plate 3, and the foaming member 4 is connected to the liquid cooling plate 2 and the bottom plate 3, the liquid cooling plate 2 can be supported under the foaming and expansion of the foaming member 4, so that the pressure on the liquid cooling plate 2 can be transmitted to the bottom plate 3 through the foaming member 4, thereby improving the structural strength of the battery pack under abuse conditions such as vibration and impact. In addition, since at least part of the foaming member 4 is arranged circumferentially around the liquid cooling plate 2, the probability of impurities such as dirt, mud and water entering between the liquid cooling plate 2 and the bottom plate 3 can be reduced, which is conducive to reducing the problem of corrosion and leakage of the liquid cooling plate 2, the sealing effect is better, and the production cost of the tray assembly can be reduced.

[0031] It should be noted that the foaming member 4 is a potting glue, which can be first injected between the liquid cooling plate 2 and the bottom plate 3, and then subjected to a room temperature or high temperature online foaming process. The potting glue expands after foaming, thereby supporting and wrapping the liquid cooling plate 2. Compared with the solution of arranging foam between the tray 1 and the bottom plate 3, the tray assembly of the embodiment of the utility model can improve the sealing effect of the tray assembly, and has better buffering and vibration reduction effects.

[0032] Optionally, a connection portion 21 is provided on the liquid cooling plate 2, the connection portion 21 is connected to the tray 1, and the foaming part 4 is in contact with the connection portion 21. Specifically, the connection portion 21 surrounds the outer edge of the liquid cooling plate 2. In other words, the outer edge of the liquid cooling plate 2 (i.e., the connection portion 21) and the four sides of the tray 1 can be connected by welding or riveting. Among them, the welding can adopt the process of friction stir welding (FSW). The riveting can adopt the process of rotary tapping riveting (FDS).

[0033] It is understandable that the foaming part 4 is embedded in the position where the liquid cooling plate 2 is connected to the tray 1. For example, when the connection part 21 and the tray 1 are welded by the FSW process, the welding area of ​​the connection part 21 is a weak area of ​​the structural strength of the liquid cooling plate 2, and therefore the area of ​​the connection part 21 is prone to failure problems such as fatigue cracking. The tray assembly of the embodiment of the utility model can transfer the local force of the welding area of ​​the liquid cooling plate 2 to the bottom plate 3 by abutting the foaming part 4 at the position of the connection part 21, and the bottom plate 3 can also bear part of the load, thereby avoiding the load concentration at the position of the FSW weld (connection part 21), optimizing the force transmission path, avoiding stress concentration, and effectively solving the problem of cracking in the FSW weld area.

[0034] In one example, in the projection plane orthogonal to the height direction of the tray 1, the outer periphery of the connection portion 21 is located within the outer periphery of the foam member 4. It can be understood that the foam member 4 completely covers the connection portion 21, thereby further improving the supporting effect of the foam member 4 on the connection portion 21 and reducing the probability of fatigue cracking at the connection portion 21.

[0035] Optionally, the width of the connection portion 21 is L1, the width of the foaming member 4 is L2, and L2 / L1≥1.1. It is understandable that the width of the foaming member 4 is greater than the width of the connection portion 21 to ensure the supporting effect of the foaming member 4 on the connection portion 21.

[0036] For example, when the connection portion 21 is connected to the tray 1 by using a friction stir welding (FSW) process, L2 / L1≥1.115.

[0037] For another example, when the connection portion 21 and the pallet 1 are connected by using a rotary tapping and riveting (FDS) process, L2 / L1≥1.125.

[0038] For another example, when the connection portion 21 and the tray 1 are connected by bonding or other connection processes, L2 / L1≥1.115.

[0039] In some embodiments, Figure 2 As shown, the foaming part 4 includes a potting outer ring 41 and a potting reinforcement section 42. The potting outer ring 41 is arranged circumferentially around the liquid cooling plate 2. There are multiple potting reinforcement sections 42, and the multiple potting reinforcement sections 42 are arranged at intervals in the potting outer ring 41. It can be understood that the potting outer ring 41 can seal and buffer the liquid cooling plate 2 all around, and the potting reinforcement section 42 can locally reinforce the middle part of the liquid cooling plate 2. For example, the potting reinforcement section 42 can strengthen the protection of the structural weak area of ​​the liquid cooling plate 2, so that the bottom of the liquid cooling plate 2 can be supported and wrapped by the foaming part 4, thereby improving the structural strength of the battery pack under abuse conditions such as vehicle vibration, impact, and bottom scraping.

[0040] Optionally, the multiple potting reinforcement segments 42 may adopt a concentric ring structure, that is, the multiple potting reinforcement segments 42 are all ring-shaped and are arranged at intervals along the radial direction of the potting outer ring 41 .

[0041] Alternatively, if Figure 2 As shown, the multiple potting reinforcement sections 42 extend along the first direction and are connected to the potting outer ring 41. The multiple potting reinforcement sections 42 are arranged at intervals along the second direction. The first direction, the second direction and the height direction of the tray 1 are orthogonal to each other. Figure 2 As shown, the first direction is the front-to-back direction of the liquid cooling plate 2, the second direction is the left-to-right direction of the liquid cooling plate 2, and the height direction of the tray 1 is the up-down direction of the tray 1. The potting reinforcement section 42 can partially reinforce the middle part of the liquid cooling plate 2 to improve the structural strength of the battery pack under abuse conditions such as vehicle vibration, impact, and bottom scraping.

[0042] In another embodiment, if Figure 3 As shown, a sandwich 31 is provided between the liquid cooling plate 2 and the bottom plate 3, and the foaming member 4 is laid flat in the sandwich 31. It can be understood that the foaming member 4 is completely filled into the sandwich 31, thereby further improving the supporting and buffering effect of the liquid cooling plate 2, and the complete potting foaming design prevents the bottom of the liquid cooling plate 2 from contacting with external impurities, thereby improving the anti-corrosion ability of the liquid cooling plate 2.

[0043] In order to ensure the contour of the liquid cooling plate 2 and the bottom plate 3 after the encapsulation and foaming, the encapsulation trajectory needs to be optimized to ensure the uniformity of the encapsulation stock solution and avoid excessive accumulation of local stock solution, which may cause local bulges after foaming. After encapsulating the interlayer 31, it is necessary to limit the flat side of the liquid cooling plate 2 and the bottom of the bottom plate 3 to avoid local bulges on the liquid cooling plate 2 or the bottom plate 3 through tooling clamping.

[0044] Optionally, the outer edge of the tray 1 is provided with a first mounting position, the outer edge of the bottom plate 3 is provided with a second mounting position, the first mounting position is abutted against the second mounting position, and the tray assembly further comprises a fastener (not shown), the fastener is passed through the first mounting position and the second mounting position. For example, the fastener may be a threaded member.

[0045] In one example, there are multiple first mounting positions and multiple second mounting positions, the multiple first mounting positions are arranged at intervals along the circumference of the tray 1, the multiple second mounting positions correspond to the multiple first mounting positions one by one, and the fasteners are respectively inserted into the corresponding first mounting positions and the second mounting positions. It can be understood that the tray 1 is connected to the bottom plate 3 by screws to facilitate the disassembly and replacement of the bottom plate 3.

[0046] A battery pack according to another embodiment of the present invention includes the tray assembly of the present invention.

[0047] According to the battery pack of the embodiment of the utility model, since the foaming member 4 is disposed between the liquid cooling plate 2 and the bottom plate 3, and the foaming member 4 is connected to the liquid cooling plate 2 and the bottom plate 3, the liquid cooling plate 2 can be supported under the foaming and expansion of the foaming member 4, so that the pressure on the liquid cooling plate 2 can be transmitted to the bottom plate 3 through the foaming member 4, thereby improving the structural strength of the battery pack under abuse conditions such as vibration and impact. In addition, since at least part of the foaming member 4 is arranged circumferentially around the liquid cooling plate 2, the probability of impurities such as dirt, mud and water entering between the liquid cooling plate 2 and the bottom plate 3 can be reduced, which is conducive to reducing the problem of corrosion and leakage of the liquid cooling plate 2, and the sealing effect is better.

[0048] Another embodiment of the vehicle of the utility model includes the tray assembly or battery pack of the utility model. The technical advantages of the vehicle of the utility model embodiment are the same as the technical advantages of the tray assembly or battery pack of the above embodiment, which will not be repeated here.

[0049] In the description of the present invention, 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 invention 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 invention.

[0050] 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 the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, 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 one; 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 the present invention can be understood according to specific circumstances.

[0052] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", 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 utility model. 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.

[0054] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A tray assembly, characterized in that: include: Tray (1); A liquid cooling plate (2), the liquid cooling plate (2) being mounted on the lower end of the tray (1); A bottom plate (3), the bottom plate (3) being mounted on the lower end of the tray (1), and the liquid cooling plate (2) being arranged between the tray (1) and the bottom plate (3); A foam member (4), wherein the foam member (4) is arranged between the liquid cooling plate (2) and the bottom plate (3), and is connected to the liquid cooling plate (2) and the bottom plate (3), and at least a portion of the foam member (4) is arranged circumferentially around the liquid cooling plate (2).

2. The tray assembly according to claim 1, characterized in that: The liquid cooling plate (2) is provided with a connecting portion (21), the connecting portion (21) is connected to the tray (1), and the foaming part (4) is in abutment with the connecting portion (21).

3. The tray assembly according to claim 2, characterized in that: In a projection plane orthogonal to the height direction of the tray (1), the outer peripheral contour of the connecting portion (21) is located within the outer peripheral contour of the foaming member (4).

4. The tray assembly according to claim 3, characterized in that: The width of the connecting portion (21) is L1, the width of the foaming part (4) is L2, and L2 / L1≥1.

1.

5. The tray assembly according to claim 1, characterized in that: The foaming part (4) comprises an encapsulation outer ring (41) and an encapsulation reinforcement section (42); the encapsulation outer ring (41) is arranged circumferentially around the liquid cooling plate (2); there are a plurality of encapsulation reinforcement sections (42); and the plurality of encapsulation reinforcement sections (42) are arranged at intervals within the encapsulation outer ring (41).

6. The tray assembly according to claim 5, characterized in that: The plurality of potting reinforcement sections (42) all extend along a first direction and are connected to the potting outer ring (41); the plurality of potting reinforcement sections (42) are arranged at intervals along a second direction; the first direction, the second direction and the height direction of the tray (1) are orthogonal to each other.

7. The tray assembly according to claim 1, characterized in that: An interlayer (31) is provided between the liquid cooling plate (2) and the bottom plate (3), and the foamed part (4) is laid flat in the interlayer (31).

8. The tray assembly according to any one of claims 1 to 7, characterized in that: The outer edge of the tray (1) is provided with a first mounting position, the outer edge of the base plate (3) is provided with a second mounting position, the first mounting position abuts against the second mounting position, and the tray assembly further comprises a fastener, the fastener is passed through the first mounting position and the second mounting position.

9. A battery pack, characterized in that: A pallet assembly comprising any one of claims 1-8.

10. A vehicle, characterized in that: Comprising the tray assembly described in any one of claims 1 to 8 or the battery pack described in claim 9.

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