Battery tray, battery pack and electric device

Abstract

The utility model discloses a battery tray, a battery pack and an electric device. The battery tray is used for loading a battery cell and comprises a first insulating layer, a second insulating layer and a heating element. The first insulating layer is used for being connected with a battery cell. The second insulating layer and the first insulating layer are stacked. The heating element is used for being connected with an external power supply, the heating element is arranged between the first insulating layer and the second insulating layer, and the first insulating layer, the second insulating layer and the heating element form an integrated component. According to the battery tray, the first insulating layer and the second insulating layer are adopted, the heating piece is integrated in the battery tray, the requirement for light weight is met, the heat transfer path can be shortened, the heat resistance is reduced, and therefore the heat transfer efficiency is improved, and temperature control over the battery is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and in particular to a battery tray, a battery pack and an electrical device. Background Art

[0002] Some current battery trays are mostly metal structures, which are very heavy and have an adverse effect on the energy density of the entire package. In addition, in the relevant technology, due to the need for thermal management, an additional heating component needs to be added, such as fixing the cold plate and the heating component and then connecting it to the tray body. This structural form not only increases the heat transfer distance of the heating component, but also increases the cooling and heat absorption distance of the cold plate, and the structure is complex and costly.

[0003] Therefore, a battery tray, a battery pack and an electrical device are needed to at least partially solve the above problems. Utility Model Content

[0004] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] In order to at least partially solve the above problems, the first aspect of the present invention provides a battery tray for loading battery cells, the battery tray comprising:

[0006] A first insulating layer, wherein the first insulating layer is used to connect with the battery core;

[0007] a second insulating layer, the second insulating layer being stacked on the first insulating layer; and

[0008] A heating element is used to connect to an external power source, the heating element is arranged between the first insulating layer and the second insulating layer, and the first insulating layer, the second insulating layer and the heating element are constructed as an integrated component.

[0009] According to the battery tray of the present application, a first insulating layer and a second insulating layer are used and a heating element is integrated inside, which not only meets the demand for lightweight, but also shortens the heat transfer path and reduces thermal resistance, thereby improving heat transfer efficiency and facilitating temperature control of the battery.

[0010] Optionally, the battery tray further includes a buffer layer, and the buffer layer is arranged on a surface of the second insulating layer facing away from the first insulating layer.

[0011] Optionally, the battery tray further includes a bottom protective layer, and the bottom protective layer is arranged on a side of the buffer layer facing away from the second insulating layer.

[0012] Optionally, the battery tray further includes:

[0013] a first adhesive layer, the first adhesive layer being connected between the second insulating layer and the buffer layer;

[0014] A second adhesive layer is connected between the buffer layer and the bottom protective layer.

[0015] Optionally, the buffer layer is configured as a foam material layer and / or a non-Newtonian fluid layer.

[0016] Optionally, the thickness of the first insulating layer is smaller than the thickness of the second insulating layer.

[0017] Optionally, the thickness of the first insulating layer is 0.1-1.0 mm; and / or

[0018] The thickness of the second insulating layer is 0.1-2.0 mm.

[0019] Optionally, the battery tray has a bottom plate portion and a frame portion, the frame portion is connected to the outer periphery of the bottom plate portion to form a receiving groove on the inner side of the frame portion, the receiving groove is used to load the battery cell, and the heating element is at least partially located on the bottom plate portion.

[0020] Optionally, the bottom plate portion is provided with reinforcing ribs.

[0021] Optionally, the heat generating element is located on the bottom plate portion and the frame portion.

[0022] Optionally, the battery tray has a first direction and a second direction orthogonal to the first direction, and the battery tray further has a reinforcing beam, the reinforcing beam and the first insulating layer are constructed as an integral component, and the reinforcing beam extends along the first direction and / or the second direction.

[0023] Optionally, the heat generating element is provided in the reinforcing beam.

[0024] Optionally, the heat generating element in the bottom plate portion is connected to the heat generating element in the frame portion.

[0025] Optionally, the first insulating layer and the second insulating layer are composite material layers; and / or, the battery tray further has a bottom protective layer, which is a composite material layer; and / or, the battery tray further has a reinforcing beam, which is a composite material beam.

[0026] A second aspect of the present invention provides a battery pack, wherein the battery pack has the battery tray described in the first aspect.

[0027] The battery pack according to the utility model has a technical effect similar to that of the battery tray of the first aspect mentioned above.

[0028] A third aspect of the present invention provides an electrical device, which includes the battery pack described in the second aspect.

[0029] The electric device according to the utility model has a technical effect similar to that of a battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following drawings of the present invention are used as a part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principle of the present invention.

[0031] In the attached figure:

[0032] Figure 1 It is a structural schematic diagram of a battery tray according to an embodiment of the present application;

[0033] Figure 2 It is a schematic diagram of the exploded structure of a battery tray according to an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 100: Battery tray 101: Bottom plate

[0036] 102: frame part 103: reinforcement beam

[0037] 104: Connecting part 105: Lifting ear

[0038] D1: First direction D2: Second direction

[0039] 110: first insulating layer 120: second insulating layer

[0040] 130: heating element 140: buffer layer

[0041] 140: Foam material layer 150: Bottom protective layer

[0042] 160: first adhesive layer 170: second adhesive layer

[0043] 106: Strengthen the ribs DETAILED DESCRIPTION

[0044] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of the features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0046] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component". It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer" and similar expressions used in this document are for illustrative purposes only and are not limiting.

[0047] Now, exemplary embodiments according to the present invention will be described in more detail with reference to the accompanying drawings.

[0048] refer to Figure 1 and Figure 2 The first aspect of the utility model provides a battery tray 100 for loading battery cells. The battery tray 100 has a bottom plate portion 101 and a frame portion 102, the frame portion 102 is connected to the outer periphery of the bottom plate portion 101 to form a receiving groove on the inner side of the frame portion 102, and the receiving groove is used to load the battery cells.

[0049] The battery tray 100 includes a first insulating layer 110, a second insulating layer 120 and a heating element 130. The first insulating layer 110 is used to connect to the battery cell. The second insulating layer 120 is stacked with the first insulating layer 110. The heating element 130 is used to connect to an external power source, and the heating element 130 is arranged between the first insulating layer 110 and the second insulating layer 120, and the first insulating layer 110, the second insulating layer 120 and the heating element 130 are constructed as an integrated component.

[0050] According to the battery tray 100 of the present application, a first insulating layer 110 and a second insulating layer 120 are used and a heating element 130 is integrated inside, which not only meets the demand for lightweight, but also shortens the heat transfer path and reduces thermal resistance, thereby improving heat transfer efficiency and facilitating temperature control of the battery.

[0051] Specifically, the battery tray 100 can have a multi-layer structure, and the main body is made of composite materials. For example, it can be made of fiber-reinforced epoxy resin composite materials. Specifically, the glass fiber cloth enters the epoxy resin glue pool through rollers, and the glass fiber cloth with glue after dipping passes through rollers. The rollers at this time control the thickness of the epoxy resin, and then undergo heat treatment and winding to make a composite material coil, that is, the above-mentioned first insulating layer 110 and second insulating layer 120. Among them, the first insulating layer 110 and the second insulating layer 120 can both form the bottom plate portion 101 and the frame portion 102 at the same time. In other words, the bottom plate portion 101 has the first insulating layer 110 and the second insulating layer 120, and the frame portion 102 also has the first insulating layer 110 and the second insulating layer 120. More specifically, the bottom plate portion 101 and the frame portion 102 are both constructed as the multi-layer structure described above. In addition, the multi-layer structure of the plate portion 101 and the frame portion 102 may also include other functional layers in addition to the first insulating layer 110 and the second insulating layer 120.

[0052] The heating element 130 may be a heating circuit, which can generate heat after being connected to an external power source and powered on. The heating element 130 may be made of metal wires such as brass, stainless steel, and nickel silver, or may be made of carbon-based polymers or ceramics with a PTC effect. Among them, metal heating wires have low costs, and the heating circuit can be etched or die-cut; carbon-based polymers and ceramic heating cores have a PTC effect, which can achieve the advantage of self-temperature control during the heating process.

[0053] The main body of the tray is molded by high temperature and high pressure. Specifically, the first insulating layer 110, the second insulating layer 120 and the heating element 130 are first stacked together and then molded by high temperature to form an integrated component. This structural form eliminates the existing process of welding aluminum profiles to form an outer frame and then welding a flat plate on the bottom to form a tray, eliminates the complex welding structure, improves integrity, and reduces the complexity of materials.

[0054] The surface of the first insulating layer 110 is used to carry the battery cell. That is, the surface of the first insulating layer 110 forms the inner surface of the above-mentioned receiving groove. As an optional embodiment, the battery cell is bonded to the first insulating layer 110 by an adhesive. Optionally, the bottom plate portion 101 is provided with a reinforcing rib 106. The reinforcing rib 106 can be constructed in a "cross" shape, a "rice" shape, or a "well" shape. The reinforcing rib 106 can not only improve the structural strength of the bottom plate portion 101, but its raised height can also be used as a glue limiting groove. By setting a suitable height to limit the amount of adhesive filled, a good bonding with the battery cell is achieved with an appropriate amount of adhesive. It is worth mentioning that the reinforcing rib 106 is a structure integrally formed with the first insulating layer 110.

[0055] The heating element 130 is at least partially located on the bottom plate 101. The heating element 130 is arranged on the bottom plate 101, which can effectively solve the problem of large heat dissipation at the bottom of the battery cell. Compared with the general heating film attached to the top of the battery cell with the cold plate or integrated with the sealing cover, the solution in this application has significant advantages.

[0056] Specifically, when the heating film is pasted on the temperature equalizing plate of the cold plate, the cold plate needs to pass through the middle heating film when cooling and taking away the heat from the battery during the cooling process. The existence of the heating film causes the heat conduction path to become larger, the thermal resistance to become larger, and the thermal conductivity of the heating film to be low, which seriously affects the cooling efficiency. The solution in this application integrates the heating element 130 in the first insulating layer 110 and the second insulating layer 120 or in the bottom plate 101, which has a higher heating efficiency, can effectively increase the temperature rise rate, shorten the charging time, and increase the vehicle's cruising range and discharge power; and as an integrated component, the process of pasting a separate heating film on the cold plate can be omitted during the assembly of the whole package, and the assembly production process is simple.

[0057] As an optional embodiment, the heating element 130 can be located in both the bottom plate 101 and the frame 102. Thus, in addition to strengthening the insulation of the battery cell area, the edge area of ​​the battery cell can also be heated to reduce the temperature difference, so as to achieve active insulation of the battery pack.

[0058] As a preferred embodiment, the heating element 130 located in the bottom plate portion 101 is connected to the heating element 130 located in the frame portion 102. For example, the heating element 130 located in the bottom plate portion 101 and the heating element 130 located in the frame portion 102 can be connected in series. Alternatively, the heating element 130 located in the bottom plate portion 101 and the heating element 130 located in the frame portion 102 can also be connected in parallel, thereby enabling the heating elements 130 in different parts to be controlled separately, so as to achieve different heating and heat preservation effects according to different temperature differences.

[0059] The battery tray 100 has a first direction D1 and a second direction D2 orthogonal to the first direction D1. The battery tray 100 also has a reinforcing beam 103. The reinforcing beam 103 is preferably made of a composite material. The reinforcing beam 103 and the first insulating layer 110 are constructed as an integral component. The reinforcing beam 103 extends along the first direction D1 and / or the second direction D2. In other words, the battery tray 100 may have a reinforcing crossbeam or a reinforcing longitudinal beam or both a reinforcing crossbeam and a reinforcing longitudinal beam. The above-mentioned heating element 130 may also be provided in the reinforcing beam 103, and the heating element 130 in the reinforcing beam 103 may be interconnected with the heating elements in the bottom plate portion 101 and the frame portion 102, and the above-mentioned heating element 130 may share the same external power supply. Among them, the first direction D1 may be a length direction, and the second direction D2 may be a width direction. It is easy to understand that the reinforcing beam 103 may also have the same multi-layer structure as the bottom plate portion 101 and the frame portion 102.

[0060] The frame portion 102 may be provided with a connection portion 104, on which a lifting lug 105 is installed, thereby serving as an installation location for the entire battery pack. As an optional implementation, the mechanical properties may be improved by increasing the size of the frame portion 102, absorbing the deformation during mechanical collision, and preventing the deformation from penetrating into the battery cell to protect the battery cell performance. When permitted by the vehicle, the outer contour dimensions of the frame portion 102 may be increased as much as possible, and the increased outer contour dimensions may be distributed to the dimensions of the surrounding frames. When the outer contour dimensions are constant, the battery cell assembly area may be reduced, thereby increasing the dimensions of the surrounding frames.

[0061] In order to improve the heating effect of the heating element 130 on the battery core, it is preferred to further reduce the distance between the heating element 130 and the battery core to improve heat transfer. Thus, the thickness of the first insulating layer 110 can be made smaller than the thickness of the second insulating layer 120. Exemplarily, the thickness of the first insulating layer 110 is 0.1 to 1.0 mm, the thickness of the second insulating layer 120 is 0.1 to 2.0 mm, and the thickness of the first insulating layer 110 is smaller than the thickness of the second insulating layer 120.

[0062] Continue to refer Figure 2 The battery tray 100 also includes a buffer layer 140, and the buffer layer 140 is arranged on the side of the second insulating layer 120 facing away from the first insulating layer 110. Specifically, the buffer layer 140 can be constructed as a foam material layer 140 to achieve lightweight and absorb vibration and shock, and the foam material layer 140 is simple to manufacture and low in cost. At the same time, the buffer layer 140 made of foam material can also have a heat preservation function. In addition, the buffer layer 140 can also be made of a non-Newtonian fluid material, that is, the buffer layer 140 can be constructed as a non-Newtonian fluid layer, so as to further enhance the buffering capacity.

[0063] It is easy to understand that the bottom plate portion 101 and the frame portion 102 may both have a buffer layer 140. Optionally, the battery tray 100 further includes a bottom protective layer 150, which is disposed on the side of the buffer layer 140 that faces away from the second insulating layer 120. The bottom protective layer 150 may also be made of the same material as the first insulating layer 110 or the second insulating layer 120 described above, and may be made using the same process.

[0064] Among them, the buffer layer 140 and the bottom protective layer 150 can be bonded and connected. As an optional embodiment, the battery tray 100 also includes a first adhesive layer 160 and a second adhesive layer 170. The first adhesive layer 160 is connected between the second insulating layer 120 and the buffer layer 140, and the second adhesive layer 170 is connected between the buffer layer 140 and the bottom protective layer 150. In other words, the buffer layer 140 is located between the first adhesive layer 160 and the second adhesive layer 170. That is, the upper and lower surfaces of the buffer layer 140 can be respectively coated with an adhesive to form the first adhesive layer 160 and the second adhesive layer 170, and then bonded between the second insulating layer 120 and the bottom protective layer 150.

[0065] Preferably, both the bottom plate portion 101 and the frame portion 102 may have a bottom protective layer 150 .

[0066] As an implementation form, the first insulating layer 110 and the second insulating layer 120 may be made of a composite material, that is, the first insulating layer 110 may be configured as a first composite material insulating layer 110 , and the second insulating layer 120 may be configured as a second composite material insulating layer 120 .

[0067] As an optional embodiment, the bottom protective layer 150 may also be made of a composite material, that is, the bottom protective layer 150 may be configured as a composite material bottom layer 150 .

[0068] Since composite materials have a low density, composite materials are used to manufacture the first insulating layer, the second insulating layer 120, the reinforcing beam 103 and the bottom protective layer 150, which can effectively reduce the weight relative to the metal tray, conform to the lightweight development trend, and improve the energy density of the whole package. At the same time, the thermal conductivity of the composite material is much smaller than that of the metal material, which can reduce the heat dissipation of the whole package and improve the thermal insulation performance of the whole package. In addition, the structure of the composite material can be fixed by bonding, and the battery cell can also be fixed to the bottom plate by structural adhesive bonding, which can effectively save processes and improve production efficiency.

[0069] A second aspect of the present invention provides a battery pack, which comprises the battery tray 100 described in the first aspect.

[0070] The battery pack according to the present invention has similar technical effects as the battery tray 100 of the first aspect described above.

[0071] A third aspect of the present invention provides an electrical device, which includes the battery pack described in the second aspect.

[0072] The electric device according to the utility model has a technical effect similar to that of a battery pack.

[0073] The above-mentioned electrical device may be, for example, a new energy vehicle.

[0074] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. The features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise specified in the other embodiment.

[0075] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and explanation, and the present invention is not limited to the above-mentioned embodiments. According to the teachings of the present invention, more variations and modifications can be made, and these variations and modifications all fall within the scope of protection required by the present invention.

Claims

1. A battery tray for loading battery cells, characterized in that: The battery tray comprises: A first insulating layer, wherein the first insulating layer is used to connect with the battery core; a second insulating layer, the second insulating layer being stacked on the first insulating layer; and A heating element is used to connect to an external power source, the heating element is arranged between the first insulating layer and the second insulating layer, and the first insulating layer, the second insulating layer and the heating element are constructed as an integrated component.

2. The battery tray according to claim 1, characterized in that: The battery tray further includes a buffer layer, which is disposed on a surface of the second insulating layer facing away from the first insulating layer.

3. The battery tray according to claim 2, characterized in that: The battery tray further includes a bottom protective layer, which is disposed on a side of the buffer layer facing away from the second insulating layer.

4. The battery tray according to claim 3, characterized in that: The battery tray also includes: a first adhesive layer, the first adhesive layer being connected between the second insulating layer and the buffer layer; A second adhesive layer is connected between the buffer layer and the bottom protective layer.

5. The battery tray according to claim 2, characterized in that: The buffer layer is configured as a foam material layer and / or a non-Newtonian fluid layer.

6. The battery tray according to claim 1, characterized in that: The thickness of the first insulating layer is smaller than the thickness of the second insulating layer.

7. The battery tray according to claim 6, characterized in that: The thickness of the first insulating layer is 0.1 to 1.0 mm; and / or, The thickness of the second insulating layer is 0.1-2.0 mm.

8. The battery tray according to any one of claims 1 to 7, characterized in that: The battery tray has a bottom plate portion and a frame portion, wherein the frame portion is connected to the outer periphery of the bottom plate portion to form a receiving groove on the inner side of the frame portion, and the receiving groove is used to load the battery cell. The heating element is at least partially located on the bottom plate portion.

9. The battery tray according to claim 8, characterized in that: The heating element is located on the bottom plate and the frame.

10. The battery tray according to claim 9, characterized in that: The bottom plate portion is provided with reinforcing ribs.

11. The battery tray according to claim 8, characterized in that: The battery tray has a first direction and a second direction orthogonal to the first direction. The battery tray also has a reinforcing beam. The reinforcing beam and the first insulating layer are constructed as an integral component. The reinforcing beam extends along the first direction and / or the second direction.

12. The battery tray according to claim 11, characterized in that: The heat generating element is arranged in the reinforcing beam.

13. The battery tray according to claim 10, characterized in that: The heating element in the bottom plate portion is connected to the heating element in the frame portion.

14. The battery tray according to claim 1, characterized in that: The first insulating layer and the second insulating layer are composite material layers; and / or the battery tray further has a bottom protective layer, which is a composite material layer; and / or the battery tray further has a reinforcing beam, which is a composite material beam.

15. A battery pack, characterized in that: The battery pack has a battery tray according to any one of claims 1-14.

16. An electrical device, characterized in that: The electric device comprises the battery pack according to claim 15.

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