Tray, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a tray, a battery pack and electric equipment, and relates to the technical field of automobile accessories. The tray comprises a cooling part which is used for being connected with the bottom wall of a battery cell of the battery pack so as to support and cool the battery cell; the at least one heat conduction part is arranged on the cooling part, and the heat conduction part is used for being in contact with one side of the battery cell. According to the tray, the battery pack and the electric equipment provided by the invention, the cooling efficiency of the battery cells is improved.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and more particularly to a tray, battery pack, and electrical equipment. Background Technology

[0002] The battery pack is a component in an electric vehicle that stores electrical energy. The battery pack includes multiple battery cells; the tray is a support structure in the battery pack, used to fix and protect the battery cells, ensuring the stability and safety of the battery cells during vehicle operation.

[0003] The related technology includes a support plate with a cold plate on it. The battery cell is placed on the cold plate. By supplying refrigerant to the refrigerant channel in the cold plate, the cold plate can cool the battery cell and improve its charging efficiency.

[0004] However, since the battery cell is placed on the cold plate, the battery cell only contacts the cold plate with its bottom wall. The contact area between the battery cell and the cold plate is small, and the cooling efficiency of the cold plate for the battery cell is low. Utility Model Content

[0005] This application provides a tray, a battery pack, and an electrical device to solve the technical problem in related technologies where the battery cells are placed on a cold plate, resulting in a small contact area between the battery cells and the cold plate, thus reducing the cooling efficiency of the cold plate on the battery cells.

[0006] In a first aspect, embodiments of this application provide a tray, comprising:

[0007] A cooling element for connecting to the bottom wall of the battery cell in the battery pack to support and cool the cell;

[0008] At least one heat-conducting element is disposed on the cooling element and is used to contact one side of the battery cell.

[0009] In some embodiments, the heat-conducting element is arranged perpendicular to the arrangement direction of the plurality of battery cells.

[0010] In some embodiments, the bottom of the heat-conducting component has a first connecting surface, which is connected to the cooling component.

[0011] In some embodiments, the top of the thermal conductive element has a second connecting surface for connecting with an insulating element between adjacent battery cells.

[0012] In some embodiments, the width of the first connecting surface is greater than the width of the second connecting surface.

[0013] In some embodiments, the heat-conducting element has heat exchange surfaces on both sides, and the heat exchange surfaces on both sides are used for connection with adjacent battery cells in a one-to-one correspondence.

[0014] In some embodiments, the heat exchange surface is connected between the first connecting surface and the second connecting surface.

[0015] In some embodiments, the heat exchange surface is an arc-shaped surface, which is configured to cooperate with the arc-shaped edge of the battery cell.

[0016] In some embodiments, the heat-conducting element is a first metal element.

[0017] In some embodiments, the cooling element includes a plate and a cooling section, the cooling section being disposed within the plate, the plate supporting the battery cell, and the cooling section cooling the plate.

[0018] In some embodiments, the heat-conducting element is welded to or integrally formed with the plate.

[0019] In some embodiments, the plate is a second metal component.

[0020] Secondly, this application provides a battery pack comprising a battery cell and a tray, wherein the battery cell is disposed on the tray.

[0021] Thirdly, embodiments of this application provide an electrical device including the aforementioned battery pack.

[0022] This application provides a tray, a battery pack, and an electrical device. The tray provided by this application, by employing a cooling component, can support and cool the battery cell simultaneously, thus eliminating the need for an additional support plate on the cooling component. The support plate supporting the battery cell and the cooling plate cooling the battery cell are integrated into a single cooling component, thereby reducing the production cost of the tray. By employing a heat-conducting component, the heat-conducting component can contact one side of the battery cell, thereby indirectly increasing the contact area between the cooling component and the battery cell. When the cooling component cools the battery cell, the heat generated by the battery cell can be transferred to the cooling component through the heat-conducting component, thereby improving the cooling efficiency of the cooling component, reducing the temperature of the battery cell, and indirectly improving the charging efficiency of the battery cell. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0024] Figure 1 This is a schematic diagram of the structure of the tray provided in this application;

[0025] Figure 2 for Figure 1 Enlarged view of part A in the image;

[0026] Figure 3 for Figure 1 A structural diagram from another angle.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100. Cooling component; 110. Plate body;

[0029] 200, heat-conducting component; 210, first connecting surface; 220, second connecting surface; 230, heat exchange surface;

[0030] 300. Battery cell; 310. Insulation component.

[0031] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0032] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0033] The related technology includes a support plate with a cold plate on it. The battery cell is placed on the cold plate. By supplying refrigerant to the refrigerant channel in the cold plate, the cold plate can cool the battery cell and improve its charging efficiency.

[0034] However, since the battery cell is placed on the cold plate, the contact area between the battery cell and the cold plate is small, resulting in low cooling efficiency of the cold plate.

[0035] The tray, battery pack, and electrical equipment provided in this application allow the heat-conducting component on the plate to contact one side of the battery cell when the battery cell is placed on the plate. The heat-conducting component is connected to the plate through a first connecting surface. The heat-conducting component can drive the second connecting surface to connect with the insulating component between adjacent battery cells. The heat-conducting component can also drive the heat exchange surfaces on both sides to cooperate with the arc-shaped edge of the adjacent battery cell. Thus, the contact area between the plate and the battery cell is indirectly increased through the heat-conducting component. When the battery cell is working, the heat of the battery cell can be directly transferred to the plate through the bottom wall of the battery cell, or it can be transferred to the heat-conducting component through the heat exchange surface of the heat-conducting component, and then transferred to the plate through the heat-conducting component. This indirectly improves the cooling efficiency of the plate and the cooling unit for the battery cell.

[0036] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0037] Combination Figures 1 to 3 This application provides a tray, comprising:

[0038] Cooling component 100 is used to connect to the bottom wall of the battery cell 300 of the battery pack to support and cool the battery cell 300;

[0039] At least one heat-conducting element 200 is disposed on the cooling element 100 and is used to contact one side of the battery cell 300.

[0040] In this embodiment, when the heat-conducting element 200 is disposed between adjacent cells 300, the heat-conducting element is in contact with the opposite side of the adjacent cells 300 at the same time; when the heat-conducting element 200 is disposed on the outside of the end cell 300 among the multiple cells 300, the heat-conducting element 200 is in contact with only one side of the end cell 300.

[0041] Due to the manufacturing process, the casing of cell 300, although having right-angled edges, has curved edges on each side. This is because cell 300 is produced by stamping metal sheets, and the curved edges of the casing are formed when the metal sheet is bent. Cell 300 is a blade battery, and blade batteries are cuboid. The number of heat-conducting components 200 can be adjusted as needed. For example, when there are ten blade batteries, they are evenly distributed on the cooling component 100, and gaps are formed between the bottoms of adjacent blade batteries due to the curved edges. In this case, there are nine heat-conducting components 200.

[0042] In other embodiments, such as when the type of cell 300 is changed, for example when cell 300 is a square battery or a cylindrical battery, the shape of the heat conductor 200 can be adapted as needed. For example, when cell 300 is a square battery, a cross-shaped gap may be formed between four adjacent square batteries. In this case, the shape of the heat conductor 200 is adapted according to the cross-shaped gap.

[0043] In this application, by employing a cooling element 100, the cooling element 100 can support the battery cell 300 and simultaneously cool the battery cell 300. This eliminates the need for additional support plates on the cooling element 100 to support the battery cell 300, integrating the support plate supporting the battery cell 300 and the cooling plate cooling the battery cell 300 into the cooling element 100, thereby reducing the production cost of the tray. By employing a heat-conducting element 200, the heat-conducting element 200 can contact one side of the battery cell 300, thereby indirectly increasing the contact area between the cooling element 100 and the battery cell 300. When the cooling element 100 cools the battery cell 300, the heat generated by the battery cell 300 can be transferred to the cooling element 100 through the heat-conducting element 200, thereby improving the cooling efficiency of the cooling element 100 on the battery cell 300. By preventing the battery cell 300 from overheating, the charging efficiency of the battery cell 300 is indirectly improved.

[0044] Combination Figures 1 to 3 The heat-conducting element 200 is arranged perpendicular to the arrangement direction of the plurality of battery cells 300. In this embodiment, the heat-conducting element 200 is arranged along the width direction of the cooling element 100.

[0045] In this embodiment, since the cell 300 is a blade battery, the heat-conducting element 200 is arranged along the width direction of the cooling element 100. If the cell 300 is another type, such as a square battery, the heat-conducting element 200 is arranged on the cooling element 100 along the width and length directions of the cooling element 100. When the cell 300 is a cylindrical battery, if the axis of the cylindrical battery is perpendicular to the cooling element 100, the heat-conducting element 200 is arranged in a cross shape. If the axis of the cylindrical battery is parallel to the cooling element 100, the heat-conducting element 200 is also arranged along the width direction of the cooling element 100.

[0046] In this embodiment, when multiple battery cells 300 are uniformly arranged on the cooling component 100, multiple heat-conducting components 200 are uniformly distributed on the cooling component 100; when the spacing between several adjacent battery cells 300 is not equal, the spacing between adjacent heat-conducting components 200 can also be adjusted as needed.

[0047] In this application, by arranging the heat-conducting element 200 along the width direction of the cooling element 100, the length of the heat-conducting element 200 is extended, so that the heat-conducting element 200 can indirectly improve the overall strength of the cooling element 100, thereby indirectly improving the support strength of the cooling element 100 for the battery pack.

[0048] Combination Figures 1 to 3 The bottom of the heat-conducting component 200 has a first connecting surface 210, which is connected to the cooling component 100.

[0049] In this embodiment, the first connecting surface 210 is rectangular; in other embodiments, a groove can be provided on the cooling component 100 and the first connecting surface 210 can be arc-shaped, or a wavy protrusion can be provided on the cooling component 100 and the first connecting surface 210 can be wavy, thereby further increasing the contact area between the first connecting surface 210 and the cooling component 100.

[0050] In this application, by adopting the first connecting surface 210, the heat-conducting component 200 can be connected to the cooling component 100 through the first connecting surface 210, thereby increasing the connection area between the heat-conducting component 200 and the cooling component 100 and improving the connection strength between the heat-conducting component 200 and the cooling component 100.

[0051] Combination Figures 1 to 3 The top of the heat-conducting component 200 has a second connecting surface 220, which is used to connect with the insulating component 310 between adjacent cells 300.

[0052] In this embodiment, an insulating member 310 is provided between adjacent battery cells 300. The insulating member 310 is polyimide aerogel. Polyimide aerogel has extremely low thermal conductivity, which can effectively isolate the heat transfer between adjacent battery cells 300 and prevent the heat generated by the battery cells 300 during operation from affecting each other, thereby maintaining the appropriate operating temperature of the battery cells 300.

[0053] In this embodiment, the second connecting surface 220 abuts against the insulating member 310; in other embodiments, the second connecting surface 220 and the insulating member 310 may also be glued together.

[0054] In this embodiment, the second connecting surface 220 is rectangular; in other embodiments, a groove can be provided on the insulating member 310 and the second connecting surface 220 can be arc-shaped, or a wavy protrusion can be provided on the insulating member 310 and the second connecting surface 220 can be wavy, thereby further increasing the contact area between the second connecting surface 220 and the insulating member 310.

[0055] In this application, by employing a second connecting surface 220 and connecting the second connecting surface 220 to the insulating member 310 between adjacent battery cells 300, and since the first connecting surface 210 and the second connecting surface 220 are respectively disposed at the bottom and top of the heat-conducting member 200, the heat-conducting member 200 can extend to the location of the heat-conducting member 200 between adjacent battery cells 300, thereby increasing the thickness of the heat-conducting member 200 and indirectly increasing the contact area between the heat-conducting member 200 and the battery cell 300, thereby further improving the cooling efficiency of the cooling member 100 on the battery cell 300.

[0056] Combination Figures 1 to 3The width of the first connecting surface 210 is greater than the width of the second connecting surface 220.

[0057] In this application, by making the width of the first connecting surface 210 greater than the width of the second connecting surface 220, the heat-conducting component 200 can form a structure that is wider at the bottom and narrower at the top, thereby improving the strength of the heat-conducting component 200. This indirectly improves the strength of the cooling component 100, thereby indirectly improving the support strength of the cooling component 100 for the battery cell 300.

[0058] Combination Figures 1 to 3 The heat-conducting component 200 has heat exchange surfaces 230 on both sides, and the heat exchange surfaces 230 on both sides are used for one-to-one connection with the adjacent battery cells 300.

[0059] In this embodiment, since the cell 300 is a blade battery, each heat-conducting element 200 has two heat exchange surfaces 230. In other embodiments, when the cell 300 is a square battery, the heat-conducting element 200 has four heat exchange surfaces 230, and the four heat exchange surfaces 230 are respectively connected to four adjacent square batteries. For example, when the cell 300 is a cylindrical battery, when the axis of the cylindrical battery is parallel to the cooling element 100, the heat-conducting element 200 has two heat exchange surfaces 230, and the two heat exchange surfaces 230 are respectively connected to adjacent cylindrical batteries. When the axis of the cylindrical battery is perpendicular to the cooling element 100, the heat-conducting element 200 has four heat exchange surfaces 230, and the four heat exchange surfaces 230 are respectively connected to four adjacent cylindrical batteries.

[0060] In this application, by providing heat exchange surfaces 230 on both sides of the heat-conducting element 200, two adjacent battery cells 300 can exchange heat with the same heat-conducting element 200, and two adjacent heat-conducting elements 200 can also exchange heat with the same battery cell 300, thereby further improving the cooling efficiency of the cooling element 100 for the battery cell 300.

[0061] Combination Figures 1 to 3 The heat exchange surface 230 is connected between the first connecting surface 210 and the second connecting surface 220.

[0062] In this application, by placing the heat exchange surface 230 between the first connecting surface 210 and the second connecting surface 220, since the first connecting surface 210 is connected to the cooling component 100 and the second connecting surface 220 is connected to the insulating component 310, the thickness of the heat exchange surface 230 in the height direction is increased, thereby further increasing the contact area between the heat exchange surface 230 and the battery cell 300, and thus further improving the cooling efficiency of the cooling component 100 on the battery cell 300.

[0063] In other embodiments, the heat exchange surface 230 may be extended between the insulating member 310 and the battery cell 300, thereby further increasing the contact area between the insulating member 310 and the battery cell 300.

[0064] Combination Figures 1 to 3 The heat exchange surface 230 is an arc-shaped surface, which is used to match the arc-shaped edge of the battery cell 300.

[0065] In this embodiment, the concave part of the arc-shaped surface is oriented towards the battery cell 300, and the curvature of the arc-shaped surface can be adjusted according to the housing of the battery cell 300. In other embodiments, a wavy protrusion can be provided on the housing of the battery cell 300. By setting the heat exchange surface 230 to be wavy, the wavy heat exchange surface 230 can cooperate with the protrusion on the housing of the battery cell 300, thereby further increasing the contact area between the heat exchange surface 230 and the battery cell 300. Alternatively, a recessed part can be provided on the housing of the battery cell 300, which is recessed towards the inside of the housing. By placing the arc-shaped surface in the recessed part, the contact area between the heat-conducting component 200 and the battery cell 300 can also be increased.

[0066] In this application, by setting the heat exchange surface 230 as an arc surface, the arc length of the arc surface is longer at the same height, so that the arc surface can fit with the arc edge of the battery cell 300, thereby further increasing the contact area and contact effect between the heat exchange surface 230 and the arc edge of the battery cell 300, thereby further improving the cooling efficiency of the cooling component 100 on the battery cell 300.

[0067] Combination Figures 1 to 3 The heat-conducting component 200 is the first metal component.

[0068] In this embodiment, the first metal component is steel or aluminum alloy. Steel has high resistance to deformation and can withstand large external forces without deformation, making the steel heat-conducting component 200 very stable. Furthermore, steel has good plasticity and toughness, allowing it to absorb energy without breaking under impact, thus improving safety. Steel can be formed through various processing techniques such as welding and stamping, making it suitable for complex design and structural requirements. Aluminum alloy has low density and exhibits high strength, making it the preferred material for lightweight designs. Aluminum alloy has good corrosion resistance and is not prone to rusting even when exposed to air for extended periods, making it suitable for various environmental conditions. Aluminum alloy can be made into various shapes and sizes through extrusion, stretching, rolling, and forging, offering high design flexibility. Aluminum alloy performs well in terms of electrical and thermal conductivity, improving the efficiency of heat transfer from the battery cell 300 to the cooling component 100 via the heat-conducting component 200.

[0069] In this application, by setting the heat-conducting element 200 as a first metal element, since the first metal element usually has a high thermal conductivity, it means that they can quickly conduct heat, thereby improving the heat transfer efficiency from the battery cell 300 to the cooling element 100, thereby further improving the cooling efficiency of the cooling element 100 on the battery cell 300; and by setting the first metal element, the strength of the cooling element 100 is further improved, thereby indirectly improving the support strength of the cooling element 100 on the battery cell 300.

[0070] Combination Figures 1 to 3 The cooling component 100 includes a plate 110 and a cooling section. The cooling section is disposed inside the plate 110. The plate 110 is used to support the battery cell 300, and the cooling section is used to cool the plate 110.

[0071] In this embodiment, the cooling section includes refrigerant channels disposed within the plate 110. The refrigerant channels are evenly distributed within the plate 110, and their shape can be adaptively adjusted as needed. For example, the refrigerant channels can be set in a serpentine shape. One end of the refrigerant channel has a refrigerant inlet, and the other end has a refrigerant outlet. Both the refrigerant inlet and outlet are disposed on the edge of the plate 110. The refrigerant inlet and outlet can be on the same side of the plate 110 or on different sides of the plate 110. By supplying refrigerant into the refrigerant channels, the refrigerant channels carry away the heat generated by the battery cell 300 through the plate 110, thereby achieving cooling of the battery cell 300.

[0072] In other embodiments, the cooling section can be an air duct disposed within the plate 110. The air duct is evenly distributed within the plate 110, and the shape of the air duct can be adaptively adjusted as needed. For example, the air duct can be set as a serpentine shape. One end of the air duct has an inlet, and the other end of the air duct has an outlet. Both the inlet and outlet are located at the edge of the plate 110. The inlet and outlet can be located on the same side of the plate 110 or on different sides of the plate 110. By blowing air into the air duct by a fan, the air duct carries away the heat generated by the battery cell 300 through the plate 110, thereby achieving cooling of the battery cell 300.

[0073] In this application, by adopting the configuration of the plate 110, the plate 110 can be directly connected to the battery cell 300, thereby enabling the plate 110 to support the battery cell 300; by setting the cooling part inside the plate 110, the cooling part is prevented from affecting the support of the plate 110 for the battery cell 300, and the cooling part cools the plate 110 inside the plate 110, so that the plate 110 can cool the battery cell 300.

[0074] Combination Figures 1 to 3 The heat-conducting component 200 is welded to or integrally set with the plate 110.

[0075] In this embodiment, the heat-conducting component 200 is integrally formed with the plate 110; the heat-conducting component 200 and the plate 110 are integrally stamped; by adopting the integrally stamped heat-conducting component 200 and the plate 110, the strength of the heat-conducting component 200 and the plate 110 is improved, and it is convenient to manufacture the heat-conducting component 200 and the plate 110.

[0076] In this application, by welding the heat-conducting component 200 to the plate 110, it is convenient to manufacture the heat-conducting component 200 separately; by integrally setting the heat-conducting component 200 and the plate 110, the heat-conducting component 200 and the plate 110 can form a whole, thereby improving the connection strength between the heat-conducting component 200 and the plate 110.

[0077] Combination Figures 1 to 3 Plate 110 is the second metal part.

[0078] In this embodiment, the material of the plate 110 is the same as that of the heat-conducting component 200, and the second metal component is also steel or aluminum alloy. Steel has high resistance to deformation and can withstand large external forces without deformation, making the steel heat-conducting component 200 very stable. Furthermore, steel has good plasticity and toughness, allowing it to absorb energy without breaking under impact, thus improving safety. Steel can be formed through various processing techniques such as welding and stamping, making it suitable for complex design and structural requirements. Aluminum alloy has low density and exhibits high strength, making it the preferred material for lightweight designs. Aluminum alloy has good corrosion resistance and is not prone to rusting even when exposed to air for extended periods, making it suitable for various environmental conditions. Aluminum alloy can be made into various shapes and sizes through extrusion, stretching, rolling, and forging, offering high design flexibility. Aluminum alloy performs well in terms of electrical and thermal conductivity, improving the efficiency of heat transfer from the battery cell 300 to the cooling component 100 via the heat-conducting component 200.

[0079] In this application, by setting both the plate 110 and the heat-conducting component 200 as second metal parts, it is convenient to manufacture the plate 110 and the heat-conducting component 200 as a single unit. When heat is transferred to the plate 110, the plate 110 can quickly transfer the heat to the cooling part, thereby further improving the cooling efficiency of the plate 110 for the battery cell 300.

[0080] In this embodiment, the width of the first connecting surface 210 is greater than 2 mm, and the width of the second connecting surface 220 is 0.8 mm; the distance between the second connecting surface 220 and the first connecting surface 210 is 1 mm, and the distance between the opposite sides of the arc-shaped surfaces is... mm, the arc length of the curved surface is 1.5 mm.

[0081] This application also provides a battery pack, including a battery cell 300 and a tray of any of the above embodiments, wherein the battery cell 300 is disposed on the tray.

[0082] The specific structure of the tray has been described in detail in the above embodiments, and will not be repeated here.

[0083] In this embodiment, the battery cell 300 can be a blade battery, a cylindrical battery, or a prismatic battery, etc.

[0084] This application also provides an electrical device including the battery pack of any of the above embodiments.

[0085] In this embodiment, the electrical device is a car, and the body is the car body; in other embodiments, the electrical device may also be other devices that use battery cells 300 and require cooling of the battery cells 300.

[0086] The electrical equipment provided in this application, by setting a tray, allows the heat-conducting element 200 on the plate 110 to contact one side of the battery cell 300 when the battery cell 300 is placed on the plate 110. The heat-conducting element 200 is connected to the plate 110 through the first connecting surface 210, and can drive the second connecting surface 220 to connect with the insulating element 310 between adjacent battery cells 300. The heat-conducting element 200 can also drive the heat exchange surfaces 230 on both sides to connect with adjacent battery cells 300. The curved edge of the heat-conducting component 200 indirectly increases the contact area between the plate 110 and the battery cell 300. When the battery cell 300 is working, the heat of the battery cell 300 can be directly transferred to the plate 110 through the bottom wall of the battery cell 300, or it can be transferred to the heat-conducting component 200 through the heat exchange surface 230 of the heat-conducting component 200, and then transferred to the plate 110 through the heat-conducting component 200, thereby indirectly improving the cooling efficiency of the plate 110 driving the cooling part to the battery cell 300.

[0087] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A tray characterized in that, The application relates to a battery pack, comprising: a cooling piece (100) used for connecting with a bottom wall of an electric cell (300) of the battery pack to support and cool the electric cell (300); at least one heat-conducting piece (200) arranged on the cooling piece (100) and in contact with one side of the electric cell (300).

2. The tray of claim 1, wherein, The heat-conducting piece (200) is arranged along a direction perpendicular to the arrangement direction of a plurality of electric cells (300).

3. The tray of claim 1, wherein, The bottom of the heat-conducting piece (200) is provided with a first connecting surface (210) connected with the cooling piece (100).

4. The tray of claim 3, wherein, The top of the heat-conducting piece (200) is provided with a second connecting surface (220) used for connecting with a partition piece (310) between adjacent electric cells (300).

5. The tray of claim 4, wherein, The width of the first connecting surface (210) is greater than that of the second connecting surface (220).

6. The tray of claim 4, wherein, Both sides of the heat-conducting piece (200) are provided with heat exchange surfaces (230) used for connecting with the adjacent electric cells (300) one by one.

7. The tray of claim 6, wherein, The heat exchange surfaces (230) are connected between the first connecting surface (210) and the second connecting surface (220).

8. The tray of claim 6, wherein, The heat exchange surfaces (230) are arc surfaces used for matching the arc edges of the electric cells (300).

9. The tray according to any one of claims 1-8, characterized in that The heat-conducting piece (200) is a first metal piece.

10. The tray according to any one of claims 1-8, characterized in that The cooling piece (100) comprises a plate body (110) and a cooling part arranged in the plate body (110), the plate body (110) is used for supporting the electric cell (300), and the cooling part is used for cooling the plate body (110).

11. The tray of claim 10, wherein, The heat-conducting piece (200) is welded or integrally arranged with the plate body (110).

12. The tray of claim 10, wherein, The plate body (110) is a second metal piece.

13. A battery pack, characterized by The application further relates to a battery pack comprising the electric cell (300) and the tray as claimed in any one of claims 1-12.

14. An electrical device, characterized by The application further relates to a battery pack comprising the electric cell (300) and the tray as claimed in any one of claims 1-12.

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