Battery device

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device which comprises a box body, a battery and a heat exchange structure, the battery is arranged in the box body, the heat exchange structure comprises a heat exchange plate, a honeycomb plate and a heat preservation layer, the heat exchange plate is connected to the box body and used for exchanging heat with the battery, and the honeycomb plate is arranged on the surface of the side, opposite to the battery, of the heat exchange plate. The heat preservation layer is arranged on the surface of the side, back on to the heat exchange plate, of the honeycomb plate, and the heat conductivity coefficient of the heat preservation layer is smaller than that of the honeycomb plate. By means of the structural design, compared with a honeycomb plate, the heat preservation layer with the smaller heat conductivity coefficient can provide the heat preservation effect for the honeycomb plate, the loss rate of heat in the honeycomb plate in the direction opposite to the side of the heat exchange plate is reduced, the preservation time of the heat transmitted into the honeycomb plate is longer, and therefore the aging problem of the honeycomb plate is solved; the service life of the honeycomb plate is prolonged, and the supporting and buffering effects of the honeycomb plate on the heat exchange plate are guaranteed.

Description

Technical Field

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

[0002] In the existing battery device design, a honeycomb panel is arranged on the surface of the heat exchange plate. However, since the honeycomb panel is usually made of plastic, when the heat loss rate of the honeycomb panel is high, the heat is difficult to be stored in the honeycomb panel for a long time, making the honeycomb panel prone to aging, affecting the buffering and supporting effect of the heat exchange plate. Utility Model Content

[0003] A main purpose of the utility model is to overcome at least one defect of the above-mentioned prior art and provide a battery device with a honeycomb panel having a long service life and a heat preservation function.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] According to one aspect of the utility model, a battery device is provided, comprising a box, a battery and a heat exchange structure, wherein the battery is arranged in the box, and the heat exchange structure comprises a heat exchange plate, a honeycomb panel and a thermal insulation layer, the heat exchange plate is connected to the box and is used to exchange heat with the battery, the honeycomb panel is arranged on a side surface of the heat exchange plate facing away from the battery, the thermal insulation layer is arranged on a side surface of the honeycomb panel facing away from the heat exchange plate, and the thermal conductivity of the thermal insulation layer is smaller than the thermal conductivity of the honeycomb panel.

[0006] It can be seen from the above technical solutions that the advantages and positive effects of the battery device proposed by the utility model are:

[0007] The battery device proposed in the utility model includes a heat exchange plate for exchanging heat with a battery, a honeycomb panel is arranged on the surface of the heat exchange plate facing away from the battery, and a heat preservation layer is arranged on the surface of the honeycomb panel facing away from the heat exchange plate, and the heat conductivity of the heat preservation layer is smaller than the heat conductivity of the honeycomb panel. Through the above structural design, compared with the honeycomb panel, the heat preservation layer with a smaller heat conductivity can provide a heat preservation effect for the honeycomb panel, slow down the heat loss rate in the honeycomb panel toward the side facing away from the heat exchange plate, so that the heat transferred to the honeycomb panel can be stored for a longer time, thereby slowing down the aging problem of the honeycomb panel, extending the service life of the honeycomb panel, and ensuring the support and buffering effect of the honeycomb panel on the heat exchange plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The various objects, features and advantages of the present invention will become more apparent by considering the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are only exemplary illustrations of the present invention and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts. Among them:

[0009] Figure 1 is a schematic diagram of a three-dimensional structure of a battery device according to an exemplary embodiment;

[0010] Figure 2 yes Figure 1 A three-dimensional exploded schematic diagram of a heat exchange structure is shown;

[0011] Figure 3 yes Figure 1 A partial cross-sectional view of the heat exchange structure shown;

[0012] Figures 4 to 6 They are partial cross-sectional views of heat exchange structures of battery devices according to several other exemplary embodiments.

[0013] The following are the descriptions of the reference numerals:

[0014] 100. Box body;

[0015] 200.Heat exchange structure;

[0016] 210.Heat exchange plate;

[0017] 2101. Third surface;

[0018] 2102. Fourth surface;

[0019] 2103. Second side;

[0020] 211. Heat exchange unit;

[0021] 212. Connecting part;

[0022] 220. Honeycomb panels;

[0023] 2201. First surface;

[0024] 2202. Second surface;

[0025] 2203. First side;

[0026] 221. Part I;

[0027] 222. Part II;

[0028] 230. Insulation layer;

[0029] H1.Thickness;

[0030] H2.Thickness. DETAILED DESCRIPTION

[0031] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present invention.

[0032] In the following description of different exemplary embodiments of the utility model, reference is made to the accompanying drawings, which form a part of the utility model and in which different exemplary structures, systems and steps that can implement multiple aspects of the utility model are shown by way of example. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the utility model. Moreover, although the terms "above", "between", "within", etc. can be used in this specification to describe different exemplary features and elements of the utility model, these terms are used herein only for convenience, such as according to the direction of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the utility model.

[0033] See also Figures 1 to 3 , Figure 1 A three-dimensional structural schematic diagram of a battery device that can embody the principle of the utility model is representatively shown in FIG. Figure 2 , a three-dimensional exploded schematic diagram of the heat exchange structure 200 is representatively shown, wherein the exploded structure of the heat exchange structure 200 in a bottom-up perspective is specifically shown; Figure 3 A partial cross-sectional view of the heat exchange structure 200 is representatively shown in FIG. 2 . The structure, connection mode and functional relationship of each main component of the battery device proposed by the present invention will be described in detail below in conjunction with the above drawings.

[0034] like Figures 1 to 3As shown, in one embodiment of the present invention, the battery device proposed by the present invention includes a housing 100, a battery and a heat exchange structure 200. The battery is arranged in the housing 100. The heat exchange structure 200 includes a heat exchange plate 210, a honeycomb panel 220 and a thermal insulation layer 230. The heat exchange plate 210 is connected to the housing 100 and is used to exchange heat with the battery. The honeycomb panel 220 is arranged on a side surface of the heat exchange plate 210 facing away from the battery (for example, the fourth surface 2102 of the heat exchange plate 210), and the thermal insulation layer 230 is arranged on a side surface of the honeycomb panel 220 facing away from the heat exchange plate 210 (for example, the second surface 2202 of the honeycomb panel 220), and the thermal conductivity of the thermal insulation layer 230 is less than the thermal conductivity of the honeycomb panel 220. Through the above structural design, compared with the honeycomb panel 220, the insulation layer 230 with a smaller thermal conductivity can provide insulation effect for the honeycomb panel 220, slow down the heat loss rate in the honeycomb panel 220 toward the side away from the heat exchange plate 210, so that the heat transferred to the honeycomb panel 220 can be kept for a longer time, thereby slowing down the aging problem of the honeycomb panel 220, extending the service life of the honeycomb panel 220, and ensuring the support and buffering effect of the honeycomb panel 220 on the heat exchange plate 210.

[0035] In one embodiment of the present invention, the thermal conductivity of the thermal insulation layer 230 may be less than or equal to 0.4 W / (m·K).

[0036] In one embodiment of the utility model, the honeycomb panel 220 and the insulation layer 230 can be connected by hot pressing. There is a hot melt adhesive layer between the honeycomb panel 220 and the insulation layer 230, and the hot melt adhesive layer is formed by cooling and solidifying the hot melt adhesive film arranged between the honeycomb panel 220 and the insulation layer 230 through hot melting connection. Through the above structural design, the utility model can use the hot melt adhesive layer to improve the connection strength between the honeycomb panel 220 and the insulation layer 230, which is convenient for hot pressing bonding of the two using the hot melt adhesive film, and convenient for process implementation.

[0037] like Figure 3 As shown, in one embodiment of the present invention, the thickness of the honeycomb panel 220 can be 3 mm to 7 mm, such as 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, etc. When the honeycomb panel 220 has an uneven thickness, the thickness of the honeycomb panel 220 can be understood as the thickness of the honeycomb panel 220 at the maximum thickness, such as Figure 3When the honeycomb panel 220 shown has a first portion 221 with a larger thickness and a second portion 222 with a smaller thickness, the thickness of the honeycomb panel 220 can be understood as the thickness H1 of the first portion 221. Through the above structural design, the utility model selects a suitable thickness for the honeycomb panel 220 to avoid excessive heat accumulation in the honeycomb panel 220 and space occupation due to excessive thickness, and to avoid insufficient support and buffering effect on the heat exchange plate 210 due to too small thickness. In some embodiments, the thickness of the honeycomb panel 220 may also be less than 3 mm, or may be greater than 7 mm, such as 2.9 mm 7.1 mm, etc., and is not limited to this embodiment.

[0038] In one embodiment of the present invention, the material of the thermal insulation layer 230 may be a composite material, such as but not limited to glass fiber. In some embodiments, the material of the thermal insulation layer 230 may also be other types of composite materials, such as other types of carbon fiber reinforced composite materials (Carbon Fiber Reinforced Epoxy, CFRE) materials, and is not limited to this embodiment.

[0039] like Figure 3 As shown, in one embodiment of the present utility model, the heat exchange plate 210 has a heat exchange portion 211 and a connection portion 212, the position of the heat exchange portion 211 is arranged corresponding to the position of the battery, and the connection portion 212 is connected to the box 100. On this basis, the honeycomb plate 220 can cover the heat exchange portion 211 and the connection portion 212 of the heat exchange plate 210, and the honeycomb plate 220 has a first portion 221 and a second portion 222, the first portion 221 is arranged corresponding to the heat exchange portion 211, and the second portion 222 is arranged corresponding to the connection portion 212. Among them, the thickness H2 of the second portion 222 of the honeycomb plate 220 is less than the thickness H1 of the first portion 221. In other words, since the side surface of the honeycomb panel 220 facing the heat exchange plate 210 (e.g., the first surface 2201) is connected to the heat exchange plate 210 and covers the heat exchange portion 211 and the connection portion 212, the other side surface of the honeycomb panel 220 facing away from the heat exchange plate 210 (e.g., the second surface 2202) presents a step-like structure or a transition structure (e.g., a slope transition, an arc transition, etc.) at the junction of the first portion 221 and the second portion 222. Through the above structural design, since the heat exchange plate 210 and the box body 100 are usually fixed by connecting parts such as bolts, the utility model designs the thickness of the area of ​​the honeycomb panel 220 corresponding to the above fixed connection to be thinner, which can ensure that the bolts and other connecting parts will not protrude from the entire battery device, thereby avoiding the rust problem of the bolts under the common working conditions of the battery device and ensuring the sealing performance of the battery device.

[0040] like Figure 3As shown, based on the structural design that the honeycomb panel 220 has a first portion 221 and a second portion 222 of different thicknesses, in one embodiment of the present utility model, the ratio of the thickness H2 of the second portion 222 to the thickness H1 of the first portion 221 can be greater than or equal to 0.1. Of course, since the thickness H2 of the second portion 222 is less than the thickness H1 of the first portion 221, the above ratio is less than 1, such as 0.1, 0.2, 0.5, 0.7, 0.9, 0.95, etc. Through the above structural design, the present utility model can avoid the thickness difference between the first portion 221 and the second portion 222 of the honeycomb panel 220 being too large, which leads to an increase in the overall thickness of the battery device, which is conducive to the vehicle installation of the battery device, and can also avoid the thickness difference being too small, which leads to the exposure of the connector, thereby ensuring the protection effect of the connector.

[0041] like Figure 3 As shown, based on the structural design of the honeycomb panel 220 having a first part 221 and a second part 222 of different thicknesses, in one embodiment of the utility model, when the overall thickness of the honeycomb panel 220 is 3mm to 7mm, which is equivalent to the thickness H1 of the first part 221 being 3mm to 7mm, and can be further preferably 6mm to 7mm, on this basis, the thickness H2 of the second part 222 can be 3mm to 4mm, and it is necessary to ensure that the thickness H2 of the second part 222 is less than the thickness H1 of the first part 221.

[0042] See also Figure 4 , Figure 4 2 is a partial cross-sectional view of a heat exchange structure 200 of a battery device in another exemplary embodiment that can embody the principles of the present invention.

[0043] like Figure 4As shown, in one embodiment of the present invention, the honeycomb panel 220 has a first surface 2201 and a second surface 2202 opposite to each other, and also has a first side surface 2203 connected between the first surface 2201 and the second surface 2202. The first surface 2201 faces and is connected to the heat exchange plate 210, and the second surface 2202 is a side surface of the honeycomb panel 220 that faces away from the heat exchange plate 210. On this basis, the thermal insulation layer 230 can be provided on the second surface 2202 and the first side surface 2203 of the honeycomb panel 220. Through the above structural design, after the honeycomb panel 220 is adaptively cut to the battery device, burrs will be generated on the side of the honeycomb panel 220. The burrs will increase the water absorption capacity of the battery device, which will affect the performance of the battery device. Therefore, it is necessary to perform hemming treatment on the side of the honeycomb panel 220, such as extending the thermal insulation layer 230 to the side of the honeycomb panel 220, and using the part of the thermal insulation layer 230 extending to the side of the honeycomb panel 220 to achieve the hemming of the honeycomb panel 220, so as to avoid the burrs on the side absorbing water and affecting the performance of the battery device. At the same time, the utility model can further enhance the thermal insulation effect of the thermal insulation layer 230. In addition, the utility model can utilize the connection relationship between the thermal insulation layer 230 and the first side 2203 to enhance the connection effect between the honeycomb panel 220 and the heat exchange plate 210, so as to avoid the two from being separated during the use of the battery device.

[0044] See also Figure 5 , Figure 5 2 is a partial cross-sectional view of a heat exchange structure 200 of a battery device in another exemplary embodiment that can embody the principles of the present invention.

[0045] like Figure 5 As shown, in one embodiment of the present invention, the heat exchange plate 210 has a third surface 2101 and a fourth surface 2102 opposite to each other, and also has a second side surface 2103 connected between the third surface 2101 and the fourth surface 2102. The fourth surface 2102 faces and is connected to the honeycomb panel 220, and the third surface 2101 is a side surface of the heat exchange plate 210 that faces away from the honeycomb panel 220. On this basis, the thermal insulation layer 230 can also be arranged on the second side surface 2103 of the heat exchange plate 210. Through the above structural design, the present invention can use the thermal insulation layer 230 to cover the gap between the heat exchange plate 210 and the honeycomb panel 220, thereby further improving the thermal insulation effect of the thermal insulation layer 230, and at the same time, it is beneficial to improve the assembly effect of the honeycomb panel 220 and the heat exchange plate 210, and at the same time, it can also improve the assembly effect of the thermal insulation layer 230 and prevent the thermal insulation layer 230 from falling off.

[0046] See also Figure 6 , Figure 6 2 is a partial cross-sectional view of a heat exchange structure 200 of a battery device in another exemplary embodiment that can embody the principles of the present invention.

[0047] like Figure 6 As shown, in one embodiment of the present invention, still taking the heat exchange plate 210 having the third surface 2101, the fourth surface 2102 and the second side surface 2103 as an example, the thermal insulation layer 230 can also be arranged at the edge area of ​​the third surface 2101 of the heat exchange plate 210. Through the above structural design, the present invention can further improve the assembly effect of the honeycomb panel 220 and the heat exchange plate 210 by using the thermal insulation layer 230.

[0048] It should be noted that the battery devices shown in the drawings and described in this specification are only a few examples of many battery devices that can adopt the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the battery devices shown in the drawings or described in this specification.

[0049] In summary, through the above structural design, compared with the honeycomb panel 220, the insulation layer 230 with a smaller thermal conductivity can provide insulation effect for the honeycomb panel 220, slow down the heat loss rate in the honeycomb panel 220 toward the side away from the heat exchange plate 210, so that the heat transferred to the honeycomb panel 220 can be kept for a longer time, thereby slowing down the aging problem of the honeycomb panel 220, extending the service life of the honeycomb panel 220, and ensuring the support and buffering effect of the honeycomb panel 220 on the heat exchange plate 210.

[0050] The exemplary embodiments of the battery device proposed by the utility model are described and / or illustrated in detail above. However, the embodiments of the utility model are not limited to the specific embodiments described here. On the contrary, the components and / or steps of each embodiment can be used independently and separately from other components and / or steps described here. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated here, the terms "one", "one" and "above" are used to indicate the presence of one or more elements / components / etc. The terms "comprising", "including" and "having" are used to indicate the meaning of open inclusion and mean that in addition to the listed elements / components / etc., there may be other elements / components / etc. In addition, the terms "first" and "second" in the claims and the specification are used only as marks and are not numerical restrictions on their objects.

[0051] Although the battery device of the present invention has been described according to various specific embodiments, those skilled in the art will recognize that the present invention can be implemented with modifications within the spirit and scope of the claims.

Claims

1. A battery device, characterized in that: include: Box; A battery, arranged in the box; as well as Heat exchange structure, including: A heat exchange plate, connected to the box and used for exchanging heat with the battery; A honeycomb plate is disposed on a surface of the heat exchange plate facing away from the battery; and A heat-insulating layer is arranged on a surface of the honeycomb plate facing away from the heat exchange plate; Wherein, the thermal conductivity of the thermal insulation layer is smaller than the thermal conductivity of the honeycomb panel.

2. The battery device according to claim 1, characterized in that: The thermal conductivity of the thermal insulation layer is less than or equal to 0.4 W / (m·K).

3. The battery device according to claim 1, characterized in that: The honeycomb panel is connected to the insulation layer by hot pressing, and a hot melt adhesive layer is provided between the honeycomb panel and the insulation layer. The hot melt adhesive layer is formed by cooling and solidifying a hot melt adhesive film arranged between the honeycomb panel and the insulation layer through hot melting connection.

4. The battery device according to claim 1, characterized in that: The thickness of the honeycomb panel is 3 mm to 7 mm.

5. The battery device according to claim 1, characterized in that: The material of the thermal insulation layer is a composite material.

6. The battery device according to any one of claims 1 to 5, characterized in that: The heat exchange plate has a heat exchange part and a connecting part, the position of the heat exchange part is arranged corresponding to the position of the battery, and the connecting part is connected to the box; wherein the honeycomb panel covers the heat exchange part and the connecting part of the heat exchange plate, and the honeycomb panel has a first part and a second part corresponding to the heat exchange part and the connecting part respectively, and the thickness of the second part is less than the thickness of the first part.

7. The battery device according to claim 6, characterized in that: A ratio of a thickness of the second portion to a thickness of the first portion is greater than or equal to 0.

1.

8. The battery device according to claim 1, characterized in that: The honeycomb panel has a first surface and a second surface opposite to each other, and also has a first side surface connected between the first surface and the second surface, and the first surface faces and is connected to the heat exchange plate; wherein the thermal insulation layer is arranged on the second surface and the first side surface.

9. The battery device according to claim 8, characterized in that: The heat exchange plate has a third surface and a fourth surface opposite to each other, and also has a second side surface connected between the third surface and the fourth surface, and the fourth surface faces and is connected to the honeycomb panel; wherein the insulation layer is also arranged on the second side surface.

10. The battery device according to claim 9, characterized in that: The thermal insulation layer is also arranged at an edge region of the third surface of the heat exchange plate.

Images