Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises a box body, a plurality of single batteries arranged in the box body and a heat preservation plate used for conducting heat preservation on the single batteries, the heat preservation plate comprises an inner plate assembly and a flexible outer wrapping layer, the inner plate assembly comprises a first plate body, a second plate body and a plurality of supporting parts, the supporting parts are arranged between the first plate body and the second plate body, and the flexible outer wrapping layer is arranged between the first plate body and the second plate body. And the first plate body and the second plate body are arranged at intervals, so that an integrated vacuum cavity is formed among the peripheries of the plurality of supporting parts, the first plate body and the second plate body. The flexible outer wrapping layer wraps the periphery of the inner plate assembly and seals the vacuum cavity. According to the heat preservation plate, the first plate body and the second plate body are supported through the multiple supporting parts arranged at intervals, the integrated vacuum cavity is formed, the inner plate assembly can be vacuumized conveniently, the periphery of the inner plate assembly is wrapped with the flexible outer wrapping layer, the flexible outer wrapping layer can be attached to the inner plate assembly more easily, and the weight of the heat preservation plate is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery device and an electric equipment. BACKGROUND

[0002] With the popularity of mobile devices and the development of electric vehicles, batteries have gradually become a widely used battery type. The temperature of the battery can affect the normal use of the battery. In some technologies, a heat preservation structure is arranged outside the lithium battery, but the heat preservation structure has a large impact on the weight of the battery. CONTENT

[0003] The present application provides a battery device and an electric equipment, aiming to improve the problems of difficult vacuumizing and large volume and weight of the heat preservation structure of the battery.

[0004] To achieve the above technical effects, one technical scheme adopted by the present application is to provide a battery device comprising a box body, a plurality of battery monomers arranged in the box body, and a heat preservation plate for heat preservation of the plurality of battery monomers, the heat preservation plate comprising:

[0005] An inner plate assembly, the inner plate assembly comprising a first plate body, a second plate body, and a plurality of support portions, wherein the plurality of support portions are arranged between the first plate body and the second plate body and are spaced apart from each other, so that the first plate body and the second plate body are spaced apart from each other and form an integrated vacuum cavity around the plurality of support portions;

[0006] A flexible outer cladding layer, the flexible outer cladding layer being wrapped around the outer periphery of the inner plate assembly and sealing the vacuum cavity.

[0007] In the present example, the plurality of support portions are arranged to support the first plate body and the second plate body and form an integrated vacuum cavity, which facilitates vacuumizing of the inner plate assembly. The flexible outer cladding layer is wrapped around the outer periphery of the inner plate assembly, and the flexible performance of the flexible outer cladding layer allows the flexible outer cladding layer to better fit the inner plate assembly, effectively reducing the volume and weight of the heat preservation plate.

[0008] Wherein, when viewed in a direction perpendicular to the first plate body or the second plate body, the plurality of support portions are arranged in a two-dimensional array manner along the length direction and the width direction of the first plate body or the second plate body.

[0009] In the present example, the support portions are arranged in a two-dimensional array manner, which can improve the support effect and facilitate the formation of the support portions on the first plate body or the second plate body, thereby simplifying the manufacturing process of the support portions and improving the manufacturing efficiency of the heat preservation plate.

[0010] The support part is integrally formed with one of the first plate body and the second plate body. In this example, the support part is integrally formed with one of the first plate body and the second plate body, which can simplify the manufacturing process of the inner plate assembly and improve the manufacturing efficiency of the insulation board.

[0011] The support part includes a first sub-support part and a second sub-support part. The first sub-support part is integrally formed with the first plate body, and the second sub-support part is integrally formed with the second plate body. The end of the first sub-support part away from the first plate body and the end of the second sub-support part away from the second plate body are in contact with each other.

[0012] In this example, the support part is divided into a first sub-support part and a second sub-support part, which are integrally formed with the first plate body and the second plate body, respectively, and then combined with each other to form a whole. This can facilitate the molding and processing of the inner plate assembly.

[0013] Some of the plurality of support parts are integrally formed with the first plate body, and the other plurality of support parts are integrally formed with the second plate body.

[0014] In this example, the plurality of support parts are matched with the first plate body and the second plate body, respectively, to process some of the support parts with the first plate body by the same process and process the other support parts with the second plate body by the same process. This can effectively reduce the process difficulty of the support parts with the first plate body and the second plate body and improve the processing efficiency of the inner plate assembly.

[0015] When viewed in a direction perpendicular to the first plate body or the second plate body, the support part is arranged in a ring shape and forms an internal cavity inside the support part.

[0016] In this example, the support part is arranged in a ring shape, which can form a hollow structure and effectively reduce the weight of the inner plate assembly.

[0017] The internal cavity and the vacuum cavity are in communication with each other.

[0018] In this example, the internal cavity and the vacuum cavity are in communication with each other, so that the internal cavity can be synchronized with the vacuum cavity for vacuumizing operation. The internal cavity in a vacuum state can further improve the heat preservation performance of the insulation board.

[0019] The internal cavity and the vacuum cavity are isolated from each other, and the vacuum degree of the internal cavity is less than that of the vacuum cavity.

[0020] In this example, the air in the internal cavity can be used to support the first plate body and the second plate body, which can improve the compression resistance of the inner plate assembly.

[0021] The ratio between the total area of the inner cavity in the inner plate assembly and the total area of the first plate body or the second plate body is between 50% and 70% when viewed in the direction perpendicular to the first plate body or the second plate body.

[0022] In the present example, by reasonably configuring the ratio between the total area of the inner cavity and the total area of the first plate body or the second plate body, the thermal insulation plate can have appropriate compression resistance and appropriate thermal insulation effect.

[0023] The ratio between the total projected area of the annular portion of the support portion in the inner plate assembly on the first plate body in the vertical direction of the first plate body and the total area of the first plate body is between 5% and 10%.

[0024] In the present example, by reasonably configuring the ratio between the total area of the support portion and the total area of the first plate body, the inner plate assembly can have appropriate structural strength and effectively reduce the weight of the inner plate assembly.

[0025] The ratio between the total projected area of the annular portion of the support portion in the inner plate assembly on the second plate body in the vertical direction of the second plate body and the total area of the second plate body is between 5% and 10%.

[0026] In the present example, by reasonably configuring the ratio between the total area of the support portion and the total area of the second plate body, the inner plate assembly can have appropriate structural strength and effectively reduce the weight of the inner plate assembly.

[0027] The ratio between the radius of the minimum circumscribed circle of the support portion and the minimum interval distance between the minimum circumscribed circles of adjacent support portions is between 1.5 and 3 when viewed in the direction perpendicular to the first plate body or the second plate body.

[0028] In the present example, by reasonably configuring the ratio between the radius of the minimum circumscribed circle of the support portion and the minimum interval distance between the minimum circumscribed circles of adjacent support portions, the inner plate assembly can have appropriate structural strength and appropriate thermal insulation effect.

[0029] The support portion is arranged in a circular ring shape or a regular polygon ring shape when viewed in the direction perpendicular to the first plate body or the second plate body. In the present example, the support effect of the support portion has better consistency.

[0030] The box body has a wall portion, a plurality of battery monomers are arranged in an array and each has an end face facing the wall portion, and the thermal insulation plate is arranged between the end faces of the plurality of battery monomers and the wall portion.

[0031] The thermal insulation plate in the present example can be arranged between the wall portion of the box body and the end face of the battery monomer to reduce the influence of rapid temperature change on the performance of the battery monomer.

[0032] The battery device further comprises a temperature regulating plate for regulating the temperature of the plurality of battery cells, and the heat preservation plate is arranged between the temperature regulating plate and the box.

[0033] The temperature regulating plate in the example can be used for heat preservation between the heat preservation plate and the box to improve the heat preservation effect.

[0034] The application further provides an example of an electric device, which comprises the battery device as described in any of the above examples, and the battery is used to provide electric energy for the electric device. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 is a structural schematic diagram of an example of an electric device of the application;

[0037] Figure 2 is a structural schematic diagram of an example of a battery device of the application;

[0038] Figure 3 is a structural schematic diagram of an example of a heat preservation plate of the application;

[0039] Figure 4 is a structural schematic diagram of another example of a heat preservation plate of the application;

[0040] Figure 5 is Figure 4 is a partial enlarged view of the 4A part in FIG. 1;

[0041] Figure 6 is a structural schematic diagram of another example of an inner plate assembly of the application;

[0042] Figure 7 is a structural schematic diagram of still another example of an inner plate assembly of the application.

[0043] Wherein: 100, battery device;

[0044] 10, heat preservation plate; 11, inner plate assembly; 111, first plate body; 112, second plate body; 113, support part; 113a, first sub-support part; 113b, second sub-support part; 113c, internal cavity; 114, vacuum cavity; 12, flexible outer cladding;

[0045] 20, battery cell;

[0046] 30, box; 31, first shell; 32, second shell; 33, wall part; 34, temperature regulating plate;

[0047] 1000a, electrical equipment; 200a, control device; 300a, driving device. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0049] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited. It should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" in the description of the present application should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in this text can be understood according to the specific circumstances.

[0050] In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any implementation described as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. The following description is presented to enable any person skilled in the art to make and use the application. Details are set forth in the following description for purpose of explanation. It should be appreciated that one of ordinary skill in the art will readily recognize that the application can be practiced without the use of these specific details. In other instances, well-known structures and processes have not been described in detail in order to avoid obscuring the description of the application. Thus, the present application is not intended to be limited by the embodiments shown, but is to be accorded with the widest scope consistent with the principles and features disclosed.

[0051] With the development of market situation, the application of batteries is more and more extensive. Batteries are not only applied to energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, military equipment and aerospace, and many other fields. With the continuous expansion of the application field of batteries, the market demand is also increasing. The battery in the example of the present application can be used for mobile phones, tablets, laptops, electric toys, electric tools, electric vehicles, electric vehicles, ships, spacecraft power equipment. Batteries can be used to power electrical equipment, and batteries can also be used to power electronic devices on electrical equipment.

[0052] The battery can include a box body, and the battery monomer can be installed in the box body. The battery can generally include one or more battery monomers, and when a plurality of battery monomers are arranged in the box body, the plurality of battery monomers can be arranged according to a preset rule; the plurality of battery monomers can be connected in series, connected in parallel, or connected in series and parallel. Other functional components can also be provided on the battery. The battery monomer generally has an electrode assembly, which can include a cathode sheet, an anode sheet, and a separator. The separator can be used to separate the cathode sheet and the anode sheet to prevent the two electrodes from contacting and short-circuiting, and also has the function of allowing electrolyte ions to pass through.

[0053] Taking a lithium battery as an example, the battery has some parts that need to be kept warm, such as the end of the battery cell, the water cooling plate, and the bottom guard plate. If there is a serious heat dissipation problem, the battery is easy to lose heat too fast in a low temperature environment. The lithium battery heat preservation plate can be used to keep the battery warm, thereby helping to improve the reliability of the battery. The heat preservation plate can effectively insulate heat and reduce heat transfer.

[0054] In some technologies, the heat preservation plate adopts a homogeneous plate structure, and in order to facilitate the installation of the heat preservation plate, a fixed frame is clamped on the surface of the homogeneous plate, and the overall structure is relatively complex. In order to improve the heat preservation performance, the volume and weight of the heat preservation plate need to be increased, so that the heat preservation plate occupies a large space on the battery, and greatly increases the weight of the battery.

[0055] The battery device 100a provided in the present application can be used in the electric equipment 1000a, which can be used in the fields of water power, fire power, wind power, solar power station, energy storage, electric bicycle, electric motorcycle, electric vehicle, electric transportation and the like. By using the battery device 100a with the heat preservation plate 10, the reliability of the battery device 100a can be improved.

[0056] Please refer to Figure 1 The battery device 100a provided in the present application can be used in the electric equipment 1000a, which can be used in the fields of water power, fire power, wind power, solar power station, energy storage, electric bicycle, electric motorcycle, electric vehicle, electric transportation and the like. By using the battery device 100a with the heat preservation plate 10, the reliability of the battery device 100a can be improved.

[0057] Please refer to Figure 2 、 Figure 3 and Figure 4 The battery device 100a provided in the present application can be used in the electric equipment 1000a, which can be used in the fields of water power, fire power, wind power, solar power station, energy storage, electric bicycle, electric motorcycle, electric vehicle, electric transportation and the like. By using the battery device 100a with the heat preservation plate 10, the reliability of the battery device 100a can be improved.

[0058] The box 30 can be used to accommodate the battery monomer 20. Optionally, the box 30 can include a first shell 31 and a second shell 32, and the first shell 31 and the second shell 32 enclose a cavity for accommodating the battery monomer 20. The number of battery monomers 20 in the battery device 100a can be one or more, and when multiple battery monomers 20 are provided, the multiple battery monomers 20 can be arranged in one row and multiple columns, multiple rows and multiple columns, or irregularly, and the multiple battery monomers 20 can be arranged in series, parallel, or series-parallel. By using the above-mentioned heat preservation plate 10, the heat preservation and insulation performance of the battery device 100a can be improved, and the possibility of heat transfer between adjacent battery devices 100a can be reduced.

[0059] Please refer to Figure 5 , Figure 6 and Figure 7 , the inner plate assembly 11 can be used as the main structure of the heat preservation plate 10, and the inner plate assembly 11 has a first plate body 111 and a second plate body 112, wherein the first plate body 111 and the second plate body 112 are oppositely arranged, and the first plate body 111 and the second plate body 112 have a gap therebetween. Optionally, the first plate body 111 and the second plate body 112 in the present example can each be a rectangular plate structure, and the areas of the end faces of the first plate body 111 and the second plate body 112 facing each other can be equal. Optionally, the first plate body 111 and the second plate body 112 can be arranged parallel to each other, and by arranging the first plate body 111 and the second plate body 112 in parallel, the inner plate assembly 11 can have relatively uniform deformation performance, which helps to improve the structural consistency of different parts of the inner plate assembly 11.

[0060] The support part 113 is arranged between the first plate body 111 and the second plate body 112, and can play a supporting and limiting role between the first plate body 111 and the second plate body 112. The number of support parts 113 is multiple, and the multiple support parts 113 are arranged at intervals from each other, so that the support part 113, the first plate body 111 and the second plate body 112 form an integrated vacuum cavity 114. The integrated vacuum cavity 114 refers to the hollow region formed between the multiple support parts 113, the first plate body 111 and the second plate body 112, which are in communication with each other. Since the support part 113 supports the first plate body 111 and the second plate body 112 and forms an integrated vacuum cavity 114, the vacuum cavity 114 can be easily evacuated, so that the shape of the thermal insulation plate 10 has certain stability and consistency. The support part 113 can support the first plate body 111 and the second plate body 112 to keep them apart, and a hollow region is formed between the outer surface of the support part 113, the first plate body 111 and the second plate body 112. Optionally, the inner plate assembly 11 can be a PP (polypropylene) honeycomb composite material. In some examples, in order to simplify the process of the inner plate assembly 11, the height direction of the support part 113 is defined from the first plate body 111 to the second plate body 112, and the first plate body 111 and the second plate body 112 can be symmetrically arranged at both ends of the height direction of the support part 113.

[0061] The flexible outer cladding layer 12 can be wrapped around the periphery of the inner plate assembly 11. The flexible outer cladding layer 12 can be used to form a cladding layer on the outer side of the inner plate assembly 11, so that the flexible outer cladding layer 12 wraps the inner plate assembly 11 to form a whole. The flexible outer cladding layer 12 seals the vacuum cavity 114 to form a closed cavity inside the inner plate assembly 11. Optionally, the flexible outer cladding layer 12 can be an aluminum plastic film or other film layer structure that can be used to seal and wrap the outside of the inner plate assembly 11.

[0062] The flexible outer cladding layer 12 in the present example is combined with the inner plate assembly 11 to form the thermal insulation plate 10. The vacuum cavity 114 of the inner plate assembly 11 can be used to reduce the temperature loss rate of the battery device 100a, improve the thermal insulation performance of the battery device 100a, and reduce the possibility of the battery device 100a losing temperature too fast in a low temperature environment. Since the flexible outer cladding layer 12 is wrapped around the periphery of the inner plate assembly 11, on the one hand, it can form a sealed cavity inside the thermal insulation plate 10, which helps to improve the sealing performance of the vacuum cavity 114, so that the thermal insulation plate 10 maintains a better vacuum degree; on the other hand, the flexible outer cladding layer 12 can more easily fit the outer surface of the inner plate assembly 11, which can simplify the structure of the thermal insulation plate 10 and reduce the overall volume and weight of the thermal insulation plate 10. Since the vacuum cavity 114 and the flexible outer cladding layer 12 are used in cooperation, the poor vacuum heat transfer performance can be used to maintain the thermal insulation performance of the thermal insulation plate 10 while reducing the volume of the thermal insulation plate 10.

[0063] The inner plate assembly 11 in the example adopts the first plate body 111, the second plate body 112, and the support part 113 to cooperate with each other, so that the inner plate assembly 11 has a certain compressibility, which can on the one hand enable the inner plate assembly 11 to absorb the tolerance of adjacent parts, and on the other hand reduce the possibility of the flexible outer package layer 12 being pressed to break and leak.

[0064] In the example, after the inner plate assembly 11 is formed, the flexible outer package layer 12 is covered outside the inner plate assembly 11, and then the whole is placed in a vacuum box to extract vacuum. After vacuum extraction, the periphery of the flexible outer package layer 12 is edge sealed by a hot pressing process, and the vacuum heat insulation performance is used to provide the thermal insulation performance for the battery device 100a.

[0065] Please refer to Figure 4 In some examples, when viewed in a direction perpendicular to the first plate body 111 or the second plate body 112, the plurality of support parts 113 are arranged in a two-dimensional array manner and spaced apart from each other along the length direction and the width direction of the first plate body 111 or the second plate body 112.

[0066] The direction perpendicular to the first plate body 111 or the second plate body 112 can be the thickness direction of the first plate body 111 or the second plate body 112.

[0067] The plurality of support parts 113 arranged in a two-dimensional array manner and spaced apart from each other along the length direction and the width direction of the first plate body 111 or the second plate body 112 means that the plurality of support parts 113 are arranged in a matrix along the length direction and the width direction of the first plate body 111 or the second plate body 112. By using the above arrangement, on the one hand, the consistency of the structural strength of the inner plate assembly 11 in the length direction and the width direction can be improved, and on the other hand, the regularity of the structure of the inner plate assembly 11 can be improved, and the forming difficulty of the inner plate assembly 11 can be reduced.

[0068] Please refer to Figure 6 In some examples, the support part 113 is integrally formed with one of the first plate body 111 and the second plate body 112. In the example, the support part 113 can be integrally processed with one of the first plate body 111 and the second plate body 112, so as to simplify the forming process of the inner plate assembly 11.

[0069] Please refer to Figure 7 In some examples, the support part 113 includes a first sub-support part 113a and a second sub-support part 113b. The first sub-support part 113a is integrally formed with the first plate body 111, and the second sub-support part 113b is integrally formed with the second plate body 112. An end of the first sub-support part 113a away from the first plate body 111 and an end of the second sub-support part 113b away from the second plate body 112 are in contact with each other.

[0070] The first sub-supporting part 113a in the example can be located on the side of the first plate body 111 facing the second plate body 112, the second sub-supporting part 113b can be located on the side of the second plate body 112 facing the first plate body 111, and the first sub-supporting part 113a and the second sub-supporting part 113b combine to form the supporting part 113.

[0071] The first sub-supporting part 113a is integrally formed with the first plate body 111 to separately form the first sub-supporting part 113a and the first plate body 111, the second sub-supporting part 113b is integrally formed with the second plate body 112 to separately form the second sub-supporting part 113b and the second plate body 112, the first sub-supporting part 113a is arranged opposite to the second supporting part 113 and in contact with each other, so that the first supporting part 113 and the second sub-supporting part 113b combine to form the supporting part 113, and the gap between the supporting part 113 and the first plate body 111 and the second plate body 112 forms the vacuum cavity 114. Optionally, the length of the first supporting part 113 and the second supporting part 113 can be equal or not equal from the first plate body 111 to the second plate body 112.

[0072] In the example, the inner plate assembly 11 can be divided into two parts and then combined, which can facilitate the forming of the internal supporting part 113 and the vacuum cavity 114, on the one hand, it helps to simplify the processing technology and reduce the processing difficulty, on the other hand, it can facilitate the control of the forming quality of the supporting part 113 and improve the structural consistency of the inner plate assembly 11.

[0073] In some examples, when viewed in a direction perpendicular to the first plate body 111 or the second plate body 112, the supporting part 113 is arranged in a ring shape and forms an internal cavity 113c inside the supporting part 113.

[0074] The supporting part 113 is arranged in a ring shape, which means that the supporting part 113 can have a hollow region inside, so that the inside of the supporting part 113 can form a cavity. Optionally, in the example, when viewed in a direction perpendicular to the first plate body 111 or the second plate body 112, the internal cavity 113c of the supporting part 113 can pass through to the first plate body 111 and the second plate body 112, and the inner surface of the supporting part 113 can be enclosed by the first plate body 111 and the second plate body 112; optionally, the end of the supporting part 113 close to the first plate body 111 and / or the second plate body 112 can be in a sealed state. In the example, when viewed in a direction perpendicular to the first plate body 111 or the second plate body 112, the inner wall surface of the supporting part 113 can be circular or regular polygonal structure, or it can be irregular shape. In the example, by adopting the supporting part 113 with the internal cavity 113c, the overall weight of the supporting part 113 can be reduced, and thus the weight of the insulation board 10 can be reduced.

[0075] In some examples, the internal cavity 113c and the vacuum cavity 114 are in communication with each other. In this example, a via hole or a notch can be arranged on the support portion 113, so that the internal cavity 113c can be in communication with the vacuum cavity 114. When the thermal insulation plate 10 is vacuumized, the vacuum cavity 114 and the internal cavity 113c of the support portion 113 can be vacuumized at the same time, so that the internal cavity 113c and the vacuum cavity 114 form an integrated negative pressure space, thereby increasing the volume of the negative pressure space of the thermal insulation plate 10 and improving the thermal insulation performance of the thermal insulation plate 10.

[0076] In some examples, the internal cavity 113c and the vacuum cavity 114 are isolated from each other, and the vacuum degree of the internal cavity 113c is less than that of the vacuum cavity 114. The internal cavity 113c formed in the support portion 113 is not in communication with the vacuum cavity 114, so that the internal cavity 113c and the vacuum cavity 114 form two independent cavity regions. In this example, the vacuum degree of the internal cavity 113c is less than that of the vacuum cavity 114, so that the internal cavity 113c can have a certain supporting effect on the support portion 113, the first plate body 111 and the second plate body 112, which helps to improve the compressibility of the thermal insulation plate 10 and thereby improve the structural performance of the thermal insulation plate 10.

[0077] In some examples, the ratio between the total area of the internal cavity 113c in the inner plate assembly 11 and the total area of the first plate body 111 or the second plate body 112 is between 50% and 70% when viewed in a direction perpendicular to the first plate body 111 or the second plate body 112.

[0078] The present application can facilitate the control of the thermal insulation performance of the thermal insulation plate 10 and the control of the structural strength of the thermal insulation plate 10 by limiting the ratio between the total area of the internal cavity 113c of the inner plate assembly 11 and the total area of the first plate body 111 or the second plate body 112. In the present example, the ratio between the total area of the internal cavity 113c of the inner plate assembly 11 and the total area of the first plate body 111 or the second plate body 112 is not less than 50%, so that the area of the vacuum cavity 114 of the inner plate assembly 11 can be within an appropriate range, and the thermal insulation plate 10 can have better thermal insulation performance when used in the battery device 100a. In the present example, by limiting the ratio between the total area of the internal cavity 113c of the inner plate assembly 11 and the total area of the first plate body 111 or the second plate body 112 to be not more than 70%, on the one hand, the problem of the thermal insulation performance of the thermal insulation plate 10 being reduced due to the volume of the vacuum cavity 114 being too small can be reduced, on the other hand, the weight of the thermal insulation plate 10 can be relatively light, and on the other hand, the thermal insulation plate 10 can have better structural strength and thermal insulation performance, and to a certain extent, the volume of the thermal insulation plate 10 can be controlled, so that the thermal insulation plate 10 occupies a relatively smaller space in the battery device 100a. In the present example, the ratio between the total area of the internal cavity 113c of the inner plate assembly 11 and the total area of the first plate body 111 or the second plate body 112 can be 50%, 55%, 60%, 65%, 70% or any other value within the above range.

[0079] In some examples, the ratio between the total projected area of the annular portion of the support 113 in the inner plate assembly 11 on the first plate body 111 in the vertical direction of the first plate body 111 and the total area of the first plate body 111 is between 5%-10%.

[0080] In the present example, by limiting the ratio between the total area of the support 113 and the total area of the first plate body 111, the number and volume of the support 113 can be facilitated to be controlled, and thus the structural strength of the thermal insulation plate 10 can be controlled. In the present example, by limiting the ratio between the total area of the support 113 in the inner plate assembly 11 and the total area of the first plate body 111 to be not less than 5%, the problem of the structural strength of the thermal insulation plate 10 being reduced due to the volume of the support 113 being too small can be reduced. In the present example, by limiting the ratio between the total area of the support 113 in the inner plate assembly 11 and the total area of the first plate body 111 to be not more than 10%, the problem of the thermal insulation performance of the thermal insulation plate 10 being reduced due to the area of the support 113 being too large can be reduced. In the present example, the ratio between the total area of the support 113 in the inner plate assembly 11 and the total area of the first plate body 111 can be 5%, 6%, 7%, 8%, 9%, 10% or any other value within the above range.

[0081] In some examples, the ratio between the total projected area of the annular portion of the support portion 113 on the second plate body 112 in the vertical direction of the second plate body 112 and the total area of the second plate body 112 is between 5%-10%.

[0082] In the present example, by limiting the ratio between the total area of the support portion 113 and the total area of the second plate body 112, the number and volume of the support portion 113 can be conveniently controlled, and thus the structural strength of the insulation board 10 can be controlled. In the present example, by limiting the ratio between the total area of the support portion 113 in the inner plate assembly 11 and the total area of the second plate body 112 to be no less than 5%, the problem of reduced structural strength of the insulation board 10 due to the excessively small volume of the support portion 113 can be reduced. In the present example, by limiting the ratio between the total area of the support portion 113 in the inner plate assembly 11 and the total area of the second plate body 112 to be no more than 10%, the problem of reduced insulation performance of the insulation board 10 due to the excessively large area of the support portion 113 can be reduced. In the present example, the ratio between the total area of the support portion 113 in the inner plate assembly 11 and the total area of the second plate body 112 can be 5%, 6%, 7%, 8%, 9%, 10% or any other value within the above range.

[0083] Please refer to Figure 5 In some examples, when viewed in the direction perpendicular to the first plate body 111 or the second plate body 112, the ratio between the radius of the minimum circumscribed circle of the support portion 113 and the minimum interval distance between the minimum circumscribed circles of adjacent support portions 113 is between 1.5-3.

[0084] The radius of the minimum circumscribed circle of the support portion 113 in the example is r, and the minimum interval distance between the minimum circumscribed circles of adjacent support portions 113 is d. By limiting the ratio of the radius of the minimum circumscribed circle of the support portion 113 to the minimum interval distance between the minimum circumscribed circles of adjacent support portions 113, the volume of the vacuum cavity 114 can be conveniently controlled. On the one hand, the weight of the heat preservation plate 10 can be controlled, and on the other hand, the heat preservation performance of the heat preservation plate 10 can be conveniently controlled to adapt the heat preservation plate 10 to the specific battery device 100a. In the example, by limiting the ratio of the radius of the minimum circumscribed circle of the support portion 113 to the minimum interval distance between the minimum circumscribed circles of adjacent support portions 113 to be not less than 1.5, the adjacent support portions can maintain an appropriate distance. On the one hand, the support portion 113 can support the inner plate assembly 11, and on the other hand, the volume of the vacuum cavity 114 formed between the adjacent support portions 113 can be within an appropriate range to make the heat preservation plate 10 have better heat preservation performance. In the example, by limiting the ratio of the radius of the minimum circumscribed circle of the support portion 113 to the minimum interval distance between the minimum circumscribed circles of adjacent support portions 113 to be not more than 3, the problem of the volume of the vacuum cavity 114 being reduced due to the support portion 113 occupying too large a proportion can be reduced, which can help control the volume of the vacuum region of the heat preservation plate 10 and further control the heat preservation performance of the heat preservation plate 10. In the example, the ratio of the radius of the minimum circumscribed circle of the support portion 113 to the minimum interval distance between the minimum circumscribed circles of adjacent support portions 113 can be 1.5, 1.8, 2, 2.3, 2.5, 2.8, 3, or any other value within the above range.

[0085] In some examples, the support portion 113 is arranged in a circular ring shape or a regular polygon ring shape when viewed in a direction perpendicular to the first plate body 111 or the second plate body 112.

[0086] The support portion 113 in the example can be in a hollow cylindrical shape, so that the support portion 113 is in a circular ring structure when viewed in a direction perpendicular to the first plate body 111 or the second plate body 112. The inner wall surface of the support portion 113 in the example can be in a regular polygon structure. The outer wall surface of the support portion 113 in the example can also be in a regular polygon structure. Alternatively, the support portion 113 is in a regular polygon ring structure when viewed in a direction perpendicular to the first plate body 111 or the second plate body 112. By limiting the cross-sectional shape of the support portion 113, the structure of the support portion 113 can be consistent, which can help improve the consistency of the support effect of the support portion 113.

[0087] Please refer to Figure 2 In some examples, the box 30 has a wall portion 33, and the plurality of battery monomers 20 are arranged in an array and each has an end surface facing the wall portion 33. The heat preservation plate 10 is arranged between the end surface of the plurality of battery monomers 20 and the wall portion 33.

[0088] The wall portion 33 can be a wall surface on the box 30, and can be a wall surface of an end portion of the battery device 100a, a water cooling plate, a bottom guard plate, or the like.

[0089] The plurality of battery cells 20 are arranged in an array within the box 30 to make full use of the internal space of the box 30. The plurality of battery cells 20 each have an end surface facing the wall portion 33, which can mean that a projection of the end surface in a direction pointing to the wall portion 33 can fall on the wall portion 33 without passing through other battery cells 20 arranged in an array.

[0090] The wall portion 33 and the end surface of the plurality of battery cells 20 are provided with the thermal insulation plate 10 for thermal insulation between the plurality of battery cells 20 and the wall portion 33. The wall portion 33 in the present example can be a wall surface of a region on the battery device 100a where heat dissipation is relatively serious, and the thermal insulation plate 10 can be used to provide a thermal insulation plate 10 at a position on the battery device 100a where heat dissipation is relatively serious, so as to reduce the problem of the battery cells 20 being affected by the serious heat dissipation of the wall portion 33.

[0091] In some examples, the battery device 100a further comprises a temperature regulating plate 34 for regulating the temperature of the plurality of battery cells 20, and the thermal insulation plate 10 is arranged between the temperature regulating plate 34 and the box 30.

[0092] The temperature regulating plate 34 can be a structure having a temperature regulating function. In some examples, the temperature regulating plate 34 can be a plate-shaped structure having a heat exchange function, which can be heat exchange through a liquid, a gas, or a gas-liquid mixed medium, or can be heat exchange in other ways.

[0093] In the present example, the temperature regulating plate 34 is arranged to provide thermal insulation between the box 30 and the thermal insulation plate 10, so as to improve the thermal insulation effect of the battery device 100a. Alternatively, the temperature regulating plate 34 can be arranged at a position on the battery device 100a where heat dissipation is relatively serious, and the position of the temperature regulating plate 34 can be determined according to the specific structure of the battery device 100a.

[0094] The thermal insulation plate 10 can be arranged at a desired position on the battery device 100a, for example, the thermal insulation plate 10 can be arranged between the battery cells 20 and an end portion of the battery device 100a, a water cooling plate, and a bottom guard plate, so as to improve the heat dissipation problem at the corresponding components of the battery cells 20.

[0095] By using the thermal insulation plate 10, the propagation of thermal runaway can be reduced, the high-temperature resistance of the battery pack can be improved, and the operating stability of the battery under extreme conditions can be improved.

[0096] Please refer to Figure 1On the basis of the above-mentioned example of the battery device 100a, the present application also proposes an example of an electrically powered device 1000a, and the battery device 100a can be used to provide electric energy for the electrically powered device 1000a. The battery device 100a in the example of the present application can serve as a power source for the electrically powered device 1000a, and the battery device 100a can also be used to supply power to electrical components on the electrically powered device 1000a. Taking the electrically powered device 1000a as an example of a vehicle, the vehicle can also include a driving device 200a and a control device 300a, and the control device 300a is used to control the battery device 100a to supply power to the driving device 200a, for example, to meet the power demand of the vehicle during starting, navigation, and driving.

[0097] Please refer to Figure 2 to Figure 7The battery device 100a includes a box 30, a plurality of battery cells 20 arranged in the box 30, and a heat preservation plate 10 to improve at least one of the above problems. The heat preservation plate 10 includes an inner plate assembly 11 and a flexible outer layer 12. The inner plate assembly 11 includes a first plate body 111, a second plate body 112, and a plurality of support portions 113 arranged between the first plate body 111 and the second plate body 112 and spaced apart from each other, so that the first plate body 111 and the second plate body 112 are spaced apart from each other and form an integrated vacuum cavity 114 around the plurality of support portions 113. The flexible outer layer 12 covers the outer periphery of the inner plate assembly 11 and seals the vacuum cavity 114. The heat preservation plate 10 can be used on a battery to improve the heat dissipation problem of the battery. In the example of the present application, the heat preservation plate 10 can include an inner plate assembly 11 and a flexible outer layer 12. The inner plate assembly 11 includes a first plate body 111, a second plate body 112, and a support portion 113 arranged between the first plate body 111 and the second plate body 112. The support portion 113 is used to be suspended between the first plate body 111 and the second plate body 112 to form an integrated vacuum cavity 114 between the first plate body 111 and the second plate body 112. The flexible outer layer 12 can be used to cover the inner plate assembly 11 so that the inner plate assembly 11 can form a relatively stable vacuum state. In the example of the present application, the support portion 113 can be integrally arranged with the first plate body 111 and the second plate body 112. The support portion 113 can be divided into a first sub-support portion 113a and a second sub-support portion 113b. The first sub-support portion 113a can be integrally arranged with the first plate body 111, and the second sub-support portion 113b can be integrally arranged with the second plate body 112, and the first sub-support portion 113a and the second sub-support portion 113b are mutually butted. In the example, the support portion 113 can be a hollow structure to further reduce the weight of the heat preservation plate 10. The cross section of the support portion 113 can be a circular ring or a regular polygonal ring structure. The number of support portions 113 is multiple. The plurality of support portions 113 can be arranged in a two-dimensional array between the first plate body 111 and the second plate body 112 to improve the consistency of the support effect.

[0098] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the contents of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A battery device, characterized by, The battery device comprises a box body, a plurality of battery cells arranged in the box body, and a heat preservation plate for heat preservation of the plurality of battery cells, the heat preservation plate comprising: an inner plate assembly comprising a first plate body, a second plate body, and a plurality of support portions, wherein the plurality of support portions are arranged between the first plate body and the second plate body and are spaced apart from each other, so that the first plate body and the second plate body are spaced apart from each other and form an integrated vacuum cavity between the periphery of the plurality of support portions and the first plate body and the second plate body; a flexible outer cladding layer covering the periphery of the inner plate assembly and sealing the vacuum cavity.

2. The battery device according to claim 1, characterized by When viewed in a direction perpendicular to the first plate body or the second plate body, the plurality of support portions are arranged in a two-dimensional array in the length direction and the width direction of the first plate body or the second plate body.

3. The battery device of claim 1, wherein The support portion is integrally formed with one of the first plate body and the second plate body.

4. The battery device of claim 1, wherein The support portion comprises a first sub-support portion integrally formed with the first plate body and a second sub-support portion integrally formed with the second plate body, and an end of the first sub-support portion away from the first plate body and an end of the second sub-support portion away from the second plate body are in contact with each other.

5. The battery device of claim 1, wherein Part of the plurality of support portions is integrally formed with the first plate body, and the other part of the plurality of support portions is integrally formed with the second plate body.

6. The battery device of claim 1, wherein When viewed in a direction perpendicular to the first plate body or the second plate body, the support portion is arranged in a ring shape and forms an internal cavity inside the support portion.

7. The battery device of claim 6, wherein The internal cavity and the vacuum cavity are in communication with each other.

8. The battery device of claim 6, wherein, The internal cavity and the vacuum cavity are isolated from each other, and the vacuum degree of the internal cavity is less than that of the vacuum cavity.

9. The battery device of claim 8, wherein, When viewed in a direction perpendicular to the first plate body or the second plate body, the ratio between the total area of the internal cavity in the inner plate assembly and the total area of the first plate body or the second plate body is between 50% and 70%.

10. The battery device of claim 9, wherein, The ratio between the total projected area of the ring-shaped part of the support portion in the inner plate assembly on the first plate body in the vertical direction of the first plate body and the total area of the first plate body is between 5% and 10%, and / or the ratio between the total projected area of the ring-shaped part of the support portion in the inner plate assembly on the second plate body in the vertical direction of the second plate body and the total area of the second plate body is between 5% and 10%.

11. The battery device according to claim 8 or 9, characterized by When viewed in a direction perpendicular to the first plate body or the second plate body, the ratio between the radius of the minimum circumscribed circle of the support portion and the minimum spacing distance between the minimum circumscribed circles of adjacent support portions is between 1.5 and 3.

12. The battery device of claim 6, wherein, When viewed in a direction perpendicular to the first plate body or the second plate body, the support portion is arranged in a circular ring shape or a regular polygon ring shape.

13. The battery device of claim 1, wherein, The box body has a wall portion, the plurality of battery cells are arranged in an array and each have an end face arranged to face the wall portion, and the heat preservation plate is arranged between the end faces of the plurality of battery cells and the wall portion.

14. The battery device of claim 1, wherein, The battery device further comprises a temperature regulating plate for regulating temperature of the plurality of battery cells, the temperature regulating plate being arranged between the temperature regulating plate and the box.

15. An electrical device, characterized by The electric device comprises the battery device as claimed in any one of claims 1 to 14, the battery being configured to provide electric energy for the electric device.

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