Battery devices and electrical equipment

Abstract

The present application relates to a battery device and an electrical equipment. The battery device comprises: a battery cell assembly; a box body, a first accommodating cavity for accommodating the battery cell assembly is formed inside; a bottom guard plate, fixed to the side of the box body opposite to the first accommodating cavity to form a second accommodating cavity; a heat exchange component, the heat exchange component is arranged in the second accommodating cavity, and the heat exchange component is configured to perform heat exchange with the battery cell assembly; a foaming formation layer, the layer is arranged between the heat exchange component and the bottom guard plate. The electrical equipment uses the battery device as a power source.

Description

Technical Field

[0001] The present application relates to a battery device and an electrical equipment, wherein the electrical equipment uses the battery device as a power source. Background Art

[0002] With the development of new energy technologies, batteries are widely used in technical fields that require energy storage and supply.

[0003] During the charging and discharging process of the battery, the temperature of the battery will change. In order to keep the operating temperature of the battery within an appropriate temperature range, a thermal management device is required to control the temperature of the battery. However, existing thermal management devices have problems such as complex manufacturing processes, and the battery device has problems such as too fast temperature drop and poor thermal insulation performance at low temperatures. Utility Model Content

[0004] In view of the problems existing in the prior art, one of the purposes of the present application is to provide a battery device and an electrical device using the battery device as a power source, wherein the battery device can achieve thermal management of the battery using a simple structure, so that it can be easily manufactured. In addition, a further purpose of the present application is to improve the thermal management performance of the battery device.

[0005] The first aspect of the present application provides a battery device. The battery device includes a battery cell assembly, a box body, a bottom guard plate, a heat exchange assembly, and a foaming layer. A first accommodating cavity for accommodating the battery cell assembly is formed inside the box body. The bottom guard plate is fixed to the side of the box body opposite to the first accommodating cavity to form a second accommodating cavity. The heat exchange assembly is arranged in the second accommodating cavity and is configured to perform heat exchange with the battery cell assembly. The foaming layer is arranged between the heat exchange assembly and the bottom guard plate.

[0006] According to one aspect of the present application, a battery device can be easily manufactured by adopting a structure in which a foaming layer is layered between a bottom guard plate and a heat exchange component, without the need for complex operations of integrating a vacuum plate and a water cooling plate as in existing thermal management devices of battery devices.

[0007] In some embodiments, optionally, a vacuum chamber is provided in the foaming forming layer or between the foaming forming layer and the bottom guard plate.

[0008] By providing a vacuum chamber in the foaming layer or between the foaming layer and the bottom guard plate, the heat preservation performance of the battery device can be improved and the cooling speed of the battery device can be reduced.

[0009] In some embodiments, optionally, a vacuum plate having a vacuum cavity is provided in the foaming forming layer or between the foaming forming layer and the bottom guard plate.

[0010] By directly configuring a vacuum plate in the foaming layer or between the foaming layer and the bottom protective plate, the thermal insulation performance of the battery device under low temperature conditions is improved and the cooling rate of the battery device under low temperature conditions is reduced. At the same time, compared with the case where a vacuum cavity is formed by vacuuming, the manufacturing process is simplified, thereby improving production efficiency.

[0011] In some embodiments, optionally, the foaming forming layer is a hard polyurethane layer formed on the bottom guard plate by online foaming forming of polyurethane foam.

[0012] By foaming the polyurethane foam online on the bottom guard plate to form a hard polyurethane layer as a foaming layer, the manufacturing process of the heat preservation device can be further simplified.

[0013] In some embodiments, optionally, a surface of the foamed molded layer in contact with the heat exchange component is formed into a shape matching the outer shape of the heat exchange component.

[0014] By forming a shape matching the outer shape of the heat exchange component on the surface of the foamed molded layer in contact with the heat exchange component, the heat exchange component and the foamed molded layer can be well fitted together, thereby improving the thermal insulation performance.

[0015] In some embodiments, optionally, the heat exchange component is configured as a bent tube, which is bent and extended along the length direction, and a heat exchange channel for conducting a heat exchange medium is provided in the bent tube.

[0016] By using a bent tube provided with a heat exchange flow channel for conducting a heat exchange medium as a heat exchange component, the heat exchange medium can be used to more effectively exchange heat for the battery.

[0017] In some embodiments, optionally, the foaming-forming layer at least partially fills the circumference of the bent tube.

[0018] By filling at least part of the circumference of the bent tube with the foamed layer, the bent tube can be effectively insulated by the foamed layer, thereby improving the heat exchange effect of the heat exchange component.

[0019] In some embodiments, optionally, the heat exchange component is configured as a brazed cold plate, and the foaming layer at least partially fills a groove of the brazed cold plate close to the bottom guard plate.

[0020] By using a brazed cold plate as a heat exchange component, the heat exchange medium flowing in the brazed cold plate can be used to more effectively exchange heat with the battery cell assembly, and by at least partially filling the foaming layer in the groove of the brazed cold plate close to the bottom guard plate, the foaming layer can be effectively used to insulate the brazed cold plate, thereby improving the heat exchange effect of the heat exchange component.

[0021] Another aspect of the present application provides an electrical device that uses any of the above-mentioned battery devices as a power source.

[0022] According to another aspect of the present application, the electrical equipment uses any of the battery devices mentioned above as a power source, and therefore has the technical effects corresponding to the battery device used as a power source.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only used for the purpose of illustrating the preferred embodiments and are not to be considered as limitations of the present application. In addition, the same reference numerals are used throughout the drawings to represent the same components.

[0025] Figure 1 2 is an exploded perspective view of a battery device according to some embodiments of the present application.

[0026] Figure 2 is a side view of a battery device according to some embodiments of the present application.

[0027] Figure 3 is a bottom view of a battery device according to some embodiments of the present application.

[0028] Figure 4 2 is an exploded perspective view of a battery device according to some embodiments of the present application.

[0029] Figure 5 is a side view of a battery device according to some embodiments of the present application.

[0030] The reference numerals in the specific implementation manner are as follows: 1 battery device, 10 heat exchange component, 11 foaming layer, 12 bottom protective plate, 13 vacuum plate, 14 box body, 14a upper box body, 14b lower box body, 15 battery cell assembly. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0033] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements; in addition, the technical term "fixed", for example, includes both a completely fixed state in which parts cannot move relative to each other, and a state in which the movement of parts is restricted and cannot move freely relative to each other. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0036] During the charging and discharging process of the battery, the temperature of the battery will change. In order to keep the operating temperature of the battery within a suitable temperature range, it is necessary to use a water cooling and heat preservation device to control the temperature of the battery. However, the water cooling and heat preservation device of the prior art needs to assemble multiple parts for manufacturing, so there are problems of complex manufacturing process and high production cost. On the other hand, according to the water cooling and heat preservation device of the prior art, there are also problems of too fast temperature drop and poor heat preservation performance under low temperature conditions.

[0037] In order to solve the problems of complicated manufacturing and high production cost of water-cooling and heat-insulating devices for battery packs in the prior art, some embodiments of the present application provide a battery device that can achieve thermal management of the battery with a simple structure, thereby being easy to manufacture. In addition, the battery device according to some embodiments of the present application can also suppress the situation where the temperature drops too fast at low temperatures, thereby improving the thermal management performance of the battery device.

[0038] The battery device of the present application can be a power battery, an energy storage battery, or any other battery that needs to control temperature during charging and discharging. The electrical equipment of the present application includes electric vehicles, portable mobile devices, and other equipment that use the battery device as a power source.

[0039] Hereinafter, the battery device and the electric equipment according to the present application will be described in detail with reference to the accompanying drawings.

[0040] Reference Figures 1 to 3 , the battery device 1 of some embodiments of the present application is described. Among them, Figure 1 is an exploded perspective view of a battery device 1 according to some embodiments of the present application; Figure 2 is a side view of a battery device 1 according to some embodiments of the present application; Figure 3 1 is a bottom view of a battery device 1 according to some embodiments of the present application.

[0041] like Figures 1 to 3 As shown, the battery device 1 of some embodiments of the present application includes a battery cell assembly 15, a box body 14, a bottom guard plate 12, a heat exchange assembly 10 and a foaming layer 11. A first accommodating cavity for accommodating the battery cell assembly 15 is formed inside the box body 14. The bottom guard plate 12 is fixed to the side of the box body 14 opposite to the first accommodating cavity to form a second accommodating cavity. The heat exchange assembly 10 is disposed in the second accommodating cavity and is configured to perform heat exchange with the battery cell assembly 15. The foaming layer 11 is disposed between the heat exchange assembly 10 and the bottom guard plate 12.

[0042] The “battery cell assembly 15 ” is an assembly in which one or more battery cells are connected in series, for example, via a bus bar or the like.

[0043] The “box body 14” is a component for accommodating the battery cell assembly 15, and can be, for example, Figure 1 As shown, the battery cell 10 comprises an upper case 14 a and a lower case 14 b , and a first accommodation chamber for accommodating a battery cell assembly 15 is formed between the upper case 14 a and the lower case 14 b .

[0044] The "heat exchange component 10" is a component that cools down the battery cell assembly by exchanging heat with the battery cell assembly. For example, it can be a liquid cooling type that uses a heat exchange medium for heat exchange, a direct cooling type that directly dissipates heat into the air such as a heat sink, and other types.

[0045] The “foamed molded layer 11 ” is a layer formed by foaming a foam material. Examples of the foam material include, but are not limited to, materials having good thermal insulation properties such as polyethylene, polypropylene, and polyurethane.

[0046] The "bottom guard plate 12" is a component used to carry and hold the heat exchange component 10 and the foamed molded layer 11. The bottom guard plate 12 is fixed to the side of the box body 14 opposite to the first accommodating cavity, forming a second accommodating cavity for accommodating the heat exchange component 10. There is no particular restriction on the material constituting the bottom guard plate 12, as long as it has the strength to carry and hold the heat exchange component 10 and the foamed molded layer 11.

[0047] The heat exchange assembly 10 , the foaming layer 11 and the bottom protective plate 12 serve as a thermal management device for thermally managing the battery device 1 .

[0048] According to the first aspect of the present application, the battery device 1 adopts a structure in which a foaming layer 11 is layered between the bottom guard plate 12 and the heat exchange component 10, and there is no need to perform complicated operations of integrating the vacuum plate and the water-cooling plate like the thermal management device of the existing battery device, so that it can be easily manufactured.

[0049] According to the battery device 1 of some embodiments of the present application, a vacuum chamber (not shown in the drawings) may be provided inside the foaming layer 11 or between the foaming layer 11 and the bottom guard plate 12 .

[0050] The "vacuum cavity" refers to a closed space in which the pressure of the internal space forms a negative pressure relative to the external space. The so-called "vacuum" here is not limited to an absolute vacuum, as long as the pressure inside the cavity is negative relative to the pressure outside the cavity. For example, the vacuum cavity can be formed by forming a closed space inside the foaming forming layer 11 or between the foaming forming layer 11 and the bottom guard plate 12, and evacuating the space.

[0051] By providing a vacuum chamber in the foaming layer 11 or between the foaming layer 11 and the bottom guard plate 12 , the heat preservation performance of the battery device 1 can be improved and the cooling speed of the battery device 1 can be reduced.

[0052] According to some embodiments of the present application, the battery device 1 is as follows: Figure 4 , Figure 5 As shown, a vacuum plate 13 having a vacuum cavity may be provided inside the foaming forming layer 11 or between the foaming forming layer 11 and the bottom guard plate 12 .

[0053] The “vacuum panel 13” is a heat-insulating component in which the inner cavity of the plate-like material is filled with core material and getter and uses the getter to form negative pressure in the cavity (i.e., form a “vacuum cavity”). When the vacuum panel 13 is used, the thermal management device also includes the vacuum panel 13.

[0054] By directly configuring the vacuum plate 13 in the foaming layer 11 or between the foaming layer 11 and the bottom protective plate 12, the thermal insulation performance of the battery device in a low temperature state is improved and the cooling rate of the battery device in a low temperature state is reduced. At the same time, compared with the case where a vacuum cavity is formed by vacuuming, the manufacturing process is simplified, thereby improving production efficiency.

[0055] According to some embodiments of the present application, the foaming layer 11 is a hard polyurethane layer formed on the bottom guard plate 12 by online foaming of polyurethane foam.

[0056] “Polyurethane” is a polyester-based polymer material, and “foam” refers to a material having a honeycomb structure with a plurality of hollow pores.

[0057] By foaming polyurethane foam online on the bottom guard plate 12 to form a hard polyurethane layer and using it as a foaming layer, the foaming layer 11, the vacuum plate 13 and the bottom guard plate 12 can be simply formed into an integrated component, thereby simply manufacturing a battery device 1 with better thermal insulation performance.

[0058] According to the battery device 1 of some embodiments of the present application, the surface of the foamed molded layer 11 in contact with the heat exchange component 10 may be formed into a shape matching the outer shape of the heat exchange component 10 .

[0059] In order to increase the heat exchange performance of the heat exchange component 10, the heat exchange component 10 usually has a convex and concave profile to increase the area for heat exchange. In this case, by forming a shape matching the shape of the heat exchange component 10 on the surface of the foamed molded layer 11 that contacts the heat exchange component 10, the heat exchange component 10 can be well attached to the foamed molded layer 11, thereby improving the thermal insulation performance.

[0060] According to the battery device 1 of some embodiments of the present application, the heat exchange component 10 can be configured as a bent tube, which is bent and extended along the length direction, and a heat exchange channel for conducting a heat exchange medium is provided in the bent tube.

[0061] "Bent tubes" are tubular components that are bent repeatedly to increase the heat exchange area, such as common serpentine tubes, etc., and heat is exchanged by circulating a heat exchange medium in the tube. The heat exchange medium can be, for example, a fluid such as water or a refrigerant.

[0062] By using a bent tube provided with a heat exchange flow channel for conducting a heat exchange medium as the heat exchange component 10 , the heat exchange medium can be used to more effectively exchange heat for the battery device 1 .

[0063] According to the battery device 1 of some embodiments of the present application, the foam-forming layer 11 may at least partially fill the circumference of the bent tube.

[0064] When a bent tube is used as the heat exchange component 10 , by at least partially filling the foaming layer 11 around the bent tube, the foaming layer 11 can be effectively utilized to insulate the bent tube, thereby improving the heat exchange effect of the heat exchange component 10 .

[0065] According to the battery device 1 of some embodiments of the present application, the heat exchange component 10 can be set as a brazing cold plate, and the foaming layer 11 at least partially fills the groove of the brazing cold plate near the bottom guard plate 12.

[0066] A "brazed cold plate" is a plate-shaped component having a flow channel formed by brazing copper plates or aluminum plates, for example, and heat exchange is performed by flowing a heat exchange medium such as water or a coolant in the flow channel. In order to increase the heat exchange area, generally, protrusions and grooves are formed on the surface of the brazed cold plate.

[0067] By using a brazed cold plate as the heat exchange component 10, the heat exchange medium flowing in the brazed cold plate can be used to more effectively exchange heat with the battery cell assembly 15, and by at least partially filling the foaming layer 11 in the groove of the brazed cold plate close to the bottom guard plate 12, the foaming layer 11 can be effectively used to insulate the brazed cold plate, thereby improving the heat exchange effect of the heat exchange component 10.

[0068] As some embodiments of the present application, an electrical device is provided, and the electrical device is equipped with the battery device 1 of some embodiments of the present application described above as a power source of the electrical device.

[0069] "Electrical equipment" refers to devices driven by electricity, for example, electric vehicles, portable mobile devices and other devices that use battery devices as power sources.

[0070] According to the electrical equipment of the present application, since the battery device 1 of some embodiments of the present application is used as a power source, it has the technical effects corresponding to the battery device 1.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Battery cell assembly; A box body, wherein a first accommodating cavity for accommodating the battery monomer assembly is formed inside; A bottom guard plate is fixed to a side of the box body opposite to the first accommodating cavity to form a second accommodating cavity; a heat exchange assembly, the heat exchange assembly being disposed in the second accommodating cavity and configured to perform heat exchange with the battery monomer assembly; A foaming layer is formed, and the layer is arranged between the heat exchange component and the bottom guard plate.

2. The battery device according to claim 1, characterized in that A vacuum chamber is provided in the foaming forming layer or between the foaming forming layer and the bottom guard plate.

3. The battery device according to claim 1, characterized in that: A vacuum plate having a vacuum cavity is arranged in the foaming forming layer or between the foaming forming layer and the bottom guard plate.

4. The battery device according to any one of claims 1 to 3, characterized in that: The foaming forming layer is a hard polyurethane layer formed on the bottom guard plate by online foaming forming of polyurethane foam.

5. The battery device according to claim 1, wherein: A shape matching the outer shape of the heat exchange component is formed on the surface of the foamed molded layer that contacts the heat exchange component.

6. The battery device according to claim 1, wherein: The heat exchange component is configured as a bent tube, the bent tube is bent and extended along the length direction, and a heat exchange flow channel for conducting a heat exchange medium is provided in the bent tube.

7. The battery device according to claim 6, characterized in that: The foam-forming layer at least partially fills the circumference of the bent tube.

8. The battery device according to claim 1, wherein: The heat exchange component is configured as a brazed cold plate, and the foaming layer at least partially fills a groove of the brazed cold plate close to the bottom guard plate.

9. An electrical device, characterized in that: The electrical equipment uses the battery device according to any one of claims 1 to 8 as a power source.

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