Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment, and relates to the technical field of batteries, the battery device is used for guaranteeing the insulation reliability between a heat exchange assembly and a battery monomer assembly, the battery device comprises a box body, the battery monomer assembly, the heat exchange assembly and an insulation structure, and the battery monomer assembly is arranged in the box body. The heat exchange assembly is arranged in the box body, the battery monomer assembly is borne on one side of the heat exchange assembly in the first direction, and the heat exchange assembly is used for conducting heat exchange with the battery monomer assembly. The insulation structure is arranged between the battery monomer assembly and the heat exchange assembly in the first direction, the insulation structure comprises an insulation coating and at least one insulation film layer, the insulation film layer comprises a plurality of sub-films in the extension direction of the insulation film layer, and at least parts of the sub-films and the insulation coating are stacked in the first direction; and the sub-film and the insulating coating in the insulating film layer are used for insulating the heat exchange assembly and the battery monomer assembly. The battery device is used for storing and providing electric energy.

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] New energy batteries are increasingly widely used in life and industry. For example, electric equipment equipped with batteries has been widely used.

[0003] In the related art, a battery device includes a heat exchange assembly and a battery monomer assembly. The battery monomer assembly is carried on the heat exchange assembly. The heat exchange assembly and the battery monomer assembly need to be insulated. Therefore, guaranteeing the insulation reliability between the two is one of the current research topics. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems, the present application provides a battery device and an electric equipment for guaranteeing the insulation reliability between the battery monomer assembly and the heat exchange assembly.

[0005] The present application is implemented through the following technical solutions.

[0006] The first aspect of the present application provides a battery device, which includes a box body, a battery monomer assembly, a heat exchange assembly, and an insulation structure. The battery monomer assembly is arranged in the box body. The heat exchange assembly is arranged in the box body. The battery monomer assembly is carried on one side of the heat exchange assembly along a first direction. The heat exchange assembly is used for heat exchange with the battery monomer assembly. Along the first direction, the insulation structure is arranged between the battery monomer assembly and the heat exchange assembly. The insulation structure includes an insulation coating and at least one insulation film layer. Along the extension direction of the insulation film layer, the insulation film layer includes a plurality of sub-films. The sub-films and at least part of the insulation coating are stacked along the first direction. The sub-films in the insulation film layer and the insulation coating are both used for insulating the heat exchange assembly and the battery monomer assembly.

[0007] In the technical solution of the present application, the box body provides a containing space and physical protection for the battery monomer assembly and the heat exchange assembly. The heat exchange assembly can exchange heat with the battery monomer assembly to adjust the temperature of the battery monomer assembly, for example, to cool the battery monomer assembly. Since the insulation structure arranged between the battery monomer assembly and the heat exchange assembly includes an insulation film layer and an insulation coating, and the insulation film layer includes a plurality of sub-films, the stacked sub-films and the insulation coating can play a double insulation role. Since the insulation coating and the insulation film layer are formed in different ways, the insulation film layer is a preformed film structure, the sub-film is also a preformed film structure, and the insulation coating is formed by spraying. Therefore, even if any one of the insulation coating and the insulation film layer has an insulation defect, they can compensate for each other to achieve better insulation effect, guarantee the insulation reliability between the battery monomer assembly and the heat exchange assembly, and guarantee the reliability of the battery device.

[0008] In addition, since the insulating film layer is composed of a plurality of sub-films, when the insulating film layer is attached, the plurality of sub-films can be attached separately, and the attachment process of the plurality of sub-films is relatively independent and does not interfere, thereby improving the convenience of attachment.

[0009] In some embodiments of the present application, along the first direction, the insulating coating is coated on one side of the heat exchange assembly carrying the battery monomer assembly, and the sub-film in the insulating film layer is attached to the side of the insulating coating away from the heat exchange assembly.

[0010] In this way, the insulating coating is first coated on the heat exchange assembly, and then the sub-film in the insulating film layer is attached to the insulating coating to form an insulating structure. Since the insulating coating is located between the insulating film layer and the heat exchange assembly, the sub-film in the insulating film layer can provide additional protection for the insulating coating against wear and scratching, and can better resist the influence of environmental factors such as moisture and corrosive gas, thereby ensuring the overall insulating reliability of the insulating structure.

[0011] In some embodiments of the present application, the insulating structure further comprises a first adhesive layer, which is attached between the insulating coating and the sub-film in the insulating film layer along the first direction.

[0012] In this way, the first adhesive layer can be used to attach and fix the sub-film in the insulating film layer to the insulating coating, ensuring the close attachment of the sub-film in the insulating film layer and the insulating coating, ensuring the insulating reliability. In addition, it can also reduce the probability of bubbles in the sub-film in the insulating film layer, reduce the probability of increased heat transfer resistance between the battery monomer assembly and the heat exchange assembly due to the existence of bubbles, and ensure that the battery monomer assembly and the heat exchange assembly can exchange heat at high efficiency through the insulating film layer and the insulating coating. In addition, it can also ensure the uniformity of heat exchange, and balance the heat transfer performance and insulating performance between the battery monomer assembly and the heat exchange assembly.

[0013] In some embodiments of the present application, along the first direction, the sub-film in the insulating film layer is attached to one side of the heat exchange assembly carrying the battery monomer assembly, and the insulating coating is coated on the side of the sub-film in the insulating film layer away from the heat exchange assembly.

[0014] In this way, the sub-film in the insulating film layer is first attached to the heat exchange assembly, and then the insulating coating is coated on the sub-film in the insulating film layer to form an insulating structure. Since the insulating film layer is located between the insulating coating and the heat exchange assembly, the insulating coating can provide additional protection for the sub-film 1413 in the insulating film layer against scratching, thereby ensuring the overall uniformity and reliability of the insulating structure.

[0015] In some embodiments of the present application, the insulation structure further comprises a second adhesive layer, which is adhered between the heat exchange assembly and the sub-film in the insulation film layer along the first direction.

[0016] In this way, the second adhesive layer can be used to attach and fix the sub-film in the insulation film layer to the heat exchange assembly, ensuring that the sub-film in the insulation film layer and the heat exchange assembly are closely attached, thereby ensuring the flatness of the insulation coating coated on the sub-film in the insulation film layer, ensuring the insulation reliability of the overall insulation structure, and further reducing the probability of bubbles in the sub-film in the insulation film layer, reducing the probability of increased heat transfer resistance between the battery monomer assembly and the heat exchange assembly due to the presence of bubbles, ensuring that the battery monomer assembly and the heat exchange assembly can exchange heat at high efficiency through the sub-film in the insulation film layer and the insulation coating, and further ensuring the uniformity of heat exchange, balancing the heat transfer performance and insulation performance between the battery monomer assembly and the heat exchange assembly.

[0017] In some embodiments of the present application, the insulation film layer has multiple layers, and the multiple layers of the insulation film layer are stacked along the first direction.

[0018] In this way, the insulation coating and the multiple layers of the insulation film layer are stacked along the first direction to form the insulation structure, improving the insulation performance of the insulation structure and ensuring the insulation reliability between the battery monomer assembly and the heat exchange assembly, thereby ensuring the reliability of the battery device.

[0019] In some embodiments of the present application, at least two of the adjacent sub-films overlap each other along the first direction.

[0020] In this way, at least two of the adjacent sub-films overlap each other along the first direction, not only retaining the independence of the attachment of multiple sub-films, but also taking into account the tightness between at least two of the adjacent sub-films, thereby ensuring the insulation performance of the combination of the adjacent sub-films and the overall insulation performance of the insulation film layer, and ensuring the insulation reliability between the battery monomer assembly and the heat exchange assembly.

[0021] In some embodiments of the present application, along the first direction, the heat exchange assembly comprises a bearing surface arranged on one side of the battery monomer assembly, and along the extension direction of the bearing surface, the bearing surface comprises a planar region and a concave-convex region, the extension direction of the planar region is perpendicular to the first direction, and at least part of the concave-convex region is recessed and / or protruded relative to the planar region; the insulation film layer further comprises a relief region penetrating along the first direction, and along the first direction, the projection of the sub-film in the insulation film layer overlaps the projection of the planar region, the projection of the relief region overlaps the projection of the concave-convex region, and the projection of the insulation coating overlaps the projection of the planar region and the projection of the concave-convex region.

[0022] In this way, the bearing surface for bearing the battery monomer assembly has a planar region and a concave-convex region. Since the concave-convex region and the planar region are both provided with the insulating coating, the insulating coating can guarantee the basic insulation requirement between the battery monomer assembly and the heat exchange assembly. Since the projection of the avoidance region and the projection of the concave-convex region overlap along the first direction to the same projection plane, the sub-film in the insulating film layer is only located in the range of the planar region. Since the extension direction of the planar region is perpendicular to the first direction, the flatness of the sub-film in the insulating film layer after being attached can be guaranteed, and the unevenness of the concave-convex region can be avoided to cause the sub-film in the insulating film layer to wrinkle, thereby guaranteeing the insulation reliability of the insulating film layer.

[0023] In some embodiments of the present application, the projection of the battery monomer assembly and the projection of the planar region overlap along the first direction to the same projection plane.

[0024] In this way, since the projection of the battery monomer assembly and the projection of the planar region overlap, the battery monomer assembly is borne on the planar region. In this way, not only the stability of the placement of the battery monomer assembly can be guaranteed, but also the insulation effect can be guaranteed by the double insulation of the sub-film in the insulating film layer and the insulating coating in the planar region, thereby improving the reliability of the battery device.

[0025] In some embodiments of the present application, the number of battery monomer assemblies, the number of avoidance regions, the number of planar regions, and the number of concave-convex regions are all multiple. The multiple planar regions and the multiple concave-convex regions are alternately arranged along the second direction. The multiple planar regions are correspondingly arranged with the multiple battery monomer assemblies, and the multiple avoidance regions are correspondingly arranged with the multiple concave-convex regions. The projection of the avoidance region and the projection of the corresponding concave-convex region overlap along the first direction to the same projection plane, and the projection of the battery monomer assembly and the projection of the corresponding planar region overlap. The first direction intersects with the second direction.

[0026] In this way, each battery monomer assembly is correspondingly arranged in each planar region, so that each region where the battery monomer assembly is located can be provided with the double insulation of the sub-film in the insulating film layer and the insulating coating. Since each concave-convex region corresponds to an avoidance region, the concave-convex region will not affect the insulating film layer. Since the multiple planar regions and the multiple concave-convex regions are alternately arranged along the second direction, the multiple battery monomer assemblies can be arranged along the second direction. Therefore, the concave-convex region between any adjacent battery monomer assemblies can be provided with other components that are adapted to the battery monomer assembly, which is conducive to the spatial layout of the battery monomer assembly and other components in the box.

[0027] In some embodiments of the present application, the battery monomer assembly comprises multiple battery monomers stacked along a third direction. The planar region and the concave-convex region are both arranged along the third direction. The first direction, the second direction, and the third direction intersect with each other.

[0028] In this way, the flat area and the stacking direction of the battery cells in the battery cell assembly are consistent, so that the battery cell assembly can be arranged, and the area of the bearing surface along the second direction and the space of the box along the second direction can be fully utilized, thereby ensuring the utilization rate of the space in the box. Since the concave-convex area also extends along the third direction, the concave-convex area can be adapted to the stacking arrangement of the battery cells in the battery cell assembly, and other components arranged in the concave-convex area between the battery cell assemblies can be adapted to the battery cell assembly. Through the adaptation of the stacking direction of the battery cells in the battery cell assembly and the extension direction of the flat area and the concave-convex area, the space utilization and the rationality of the space layout in the box can be considered.

[0029] In some embodiments of the present application, the avoidance area penetrates through the opposite sides of the insulating film layer along the third direction.

[0030] In this way, the avoidance area penetrates through the opposite sides of the insulating film layer along the third direction to divide the insulating film layer into multiple independent parts, each part is attached to the corresponding flat area. Since the multiple parts do not interfere with each other, the multiple parts can be attached respectively when attaching the insulating film layer, so as to finally form the insulating film layer, which can reduce the influence of the concave-convex area on the attachment of the insulating film layer and improve the convenience of attachment.

[0031] In some embodiments of the present application, at least part of the adjacent sub-films is arranged in a spaced manner along the extension direction of the insulating film layer to form the avoidance area.

[0032] In this way, at least part of the multiple sub-films is arranged in a spaced manner to form the avoidance area, which can realize the independence of the attachment of the multiple sub-films and avoid the influence of the concave-convex area on the sub-films, and consider the convenience of the attachment of the sub-films and the flatness of the attachment of the sub-films.

[0033] In some embodiments of the present application, along the projection of the same projection surface in the first direction, the projection of the sub-film in the insulating film layer and the projection of the insulating coating completely overlap the projection of the heat exchange assembly.

[0034] In this way, the sub-film and the insulating coating of the laminated insulating film layer are completely attached to the surface of the heat exchange assembly close to the battery cell assembly, which can maximize the insulation reliability between the heat exchange assembly and the battery cell assembly.

[0035] In some embodiments of the present application, along the first direction, the heat exchange assembly includes a bearing surface arranged on one side of the battery cell assembly, and the extension direction of the bearing surface is perpendicular to the first direction.

[0036] Therefore, the bearing surface is a plane, which can not only facilitate the bearing of the battery monomer assembly, but also guarantee the close adhesion of the insulating film layer and the flatness of the insulating coating, guarantee the insulation reliability of the insulating structure as a whole, and reduce the probability of bubbles in the insulating film layer and the probability of increased heat transfer resistance between the battery monomer assembly and the heat exchange assembly due to the existence of bubbles, guaranteeing that the battery monomer assembly and the heat exchange assembly can exchange heat at high efficiency through the insulating film layer and the insulating coating, and guaranteeing the uniformity of heat exchange, taking into account the heat transfer performance and insulation performance between the battery monomer assembly and the heat exchange assembly.

[0037] In some embodiments of the present application, along the extension direction of the insulating coating, the insulating coating includes a first weak area, and along the first direction, a sub-film in the insulating film layer is attached to a side of the first weak area away from the heat exchange assembly; or, along the extension direction of the insulating film layer, a sub-film in the insulating film layer includes a second weak area, and along the first direction, the insulating coating is coated on a side of the second weak area away from the heat exchange assembly.

[0038] Therefore, the first weak area on the insulating coating can be supplemented with a sub-film in the insulating film layer as needed to supplement and enhance the insulation performance of the first weak area by the insulating film layer, thereby guaranteeing the insulation performance of the insulating structure as a whole, taking into account the material consumption of the sub-film in the insulating film layer and the insulation performance of the insulating structure. Similarly, the second weak area on the sub-film in the insulating film layer can be supplemented with an insulating coating as needed to supplement and enhance the insulation performance of the second weak area by the insulating coating, thereby guaranteeing the insulation performance of the insulating structure as a whole, taking into account the material consumption of the sub-film in the insulating film layer and the insulation performance of the insulating structure.

[0039] In some embodiments of the present application, the thickness of the insulating coating is in the range of 50 μm-400 μm.

[0040] Therefore, the lower limit of 50 μm of the thickness of the insulating coating can guarantee its basic insulation performance, and also reduce the material consumption of the insulating coating, control the cost, control the weight of the insulating structure, be conducive to the lightweight of the battery device, and make the insulating structure occupy less space, thereby guaranteeing the energy density of the battery device. The upper limit of 400 μm of the thickness of the insulating coating can guarantee that the insulating coating has better insulation performance and improve the insulation reliability of the battery device.

[0041] The second aspect of the present application provides a power utilization equipment including the battery device in any of the above embodiments.

[0042] In the technical solutions of the embodiments of the present application, since the battery device in any of the above embodiments is included, the same beneficial effects can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 is a structural schematic diagram of a vehicle provided by an embodiment of the present application;

[0044] Figure 2 is an explosion schematic diagram of a battery device provided by an embodiment of the present application;

[0045] Figure 3 is an internal structural schematic diagram of a battery device provided by an embodiment of the present application;

[0046] Figure 4 is a cross-sectional schematic diagram at A-A in Figure 3

[0047] Figure 5 is a cross-sectional schematic diagram along a first direction in which an insulating coating layer is located between an insulating film layer and a heat exchange component provided by an embodiment of the present application;

[0048] Figure 6 is a cross-sectional schematic diagram along a first direction in which an insulating film layer is located between an insulating coating layer and a heat exchange component provided by an embodiment of the present application;

[0049] Figure 7 is a cross-sectional schematic diagram along a first direction in which an insulating coating layer is located between a multilayer insulating film layer and a heat exchange component provided by an embodiment of the present application;

[0050] Figure 8 is a cross-sectional schematic diagram along a first direction in which a multilayer insulating film layer is located between an insulating coating layer and a heat exchange component provided by an embodiment of the present application;

[0051] Figure 9 is a top view schematic diagram in which an insulating film layer includes a plurality of sub-films provided by an embodiment of the present application;

[0052] Figure 10 is a cross-sectional schematic diagram at B-B in Figure 9

[0053] Figure 11 is a top view schematic diagram of a heat exchange component without an insulating structure provided by an embodiment of the present application;

[0054] Figure 12 is a first top view schematic diagram of a heat exchange component with an insulating structure provided by an embodiment of the present application;

[0055] Figure 13 is a top view schematic diagram of a heat exchange component with a battery monomer component carried thereon provided by an embodiment of the present application;

[0056] Figure 14 is a second top view schematic diagram of a heat exchange component with an insulating structure provided by an embodiment of the present application;​​

[0057] Figure 15 is a sectional view of the insulating coating layer including a first weak area provided by an embodiment of the present application;

[0058] Figure 16 is a sectional view of the insulating film layer including a second weak area provided by an embodiment of the present application.

[0059] It should be noted that the above-mentioned "first" and "second" are only used to distinguish different schemes, and do not represent the advantages or disadvantages of the schemes or the priority in the implementation process.

[0060] Explanation of reference signs

[0061] 1000 - vehicle; 100 - battery device; 110 - box body; 111 - first box part; 112 - second box part; 120 - battery cell assembly; 121 - battery cell; 130 - heat exchange assembly; 131 - first plate body; 132 - second plate body; a - first groove body; b - second groove body; 133 - bearing surface; 1331 - flat area; 1332 - concave-convex area; 140 - insulating structure; 141 - insulating film layer; 1411 - avoiding area; 1412 - second weak area; 1413 - sub-film; 142 - insulating coating layer; 1421 - first weak area; 143 - first adhesive layer; 144 - second adhesive layer; 200 - controller; 300 - motor; X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0062] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and the above drawings description of the present application are intended to cover non-exclusive inclusion.

[0064] In the description of the embodiments of the present application, the technical terms "first", "second", "third" and the like 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 two or more, unless otherwise specifically limited.

[0065] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment. One of ordinary skill in the art will readily recognize from the disclosure herein a wide number of variations, alternatives, and equivalents in the application.

[0066] In the description of the embodiments of the application, the term“and / or” only means an association relationship of the associated objects, and can represent three relationships, for example, A and / or B, which can represent three cases of existence of A alone, existence of A and B together, and existence of B alone. In addition, the character“ / ” herein generally represents an“or” relationship between the front and rear associated objects.

[0067] In the description of the embodiments of the application, the technical terms“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“left”,“right”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer”,“circumferential”, and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed in a particular orientation, operate or be used in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the application.

[0068] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection”,“fixing”, and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0069] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical term“contact” should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, and can be contact between two objects in contact without interaction force, or contact between two objects in contact with interaction force.

[0070] The application will be described in detail below.

[0071] At present, new energy batteries are more and more widely used in life and industry. New energy batteries are not only used in energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aircraft and other fields. With the continuous expansion of the application field of power batteries, the market demand is also increasing.

[0072] In the existing battery system, the battery device includes a battery monomer assembly and a heat exchange assembly, the battery monomer assembly is carried on the heat exchange assembly, and heat exchange can be performed between the battery monomer assembly and the heat exchange assembly. Since the battery monomer assembly is electrified, and the heat exchange assembly generally has a conductive property, insulation needs to be provided between the battery monomer assembly and the heat exchange assembly, and the insulation reliability between the battery monomer assembly and the heat exchange assembly is one of the current research topics.

[0073] In the related art, the following two ways are used to realize the insulation between the battery monomer assembly and the heat exchange assembly.

[0074] The first way is to spray insulating paint on the surface of the heat exchange assembly close to the battery monomer assembly in the case of ultra-high direct current voltage (more than 3600 volts, for example, 9300 volts). In theory, in a dust-free environment, an insulating paint with a thickness of 110 μm (microns) to 210 μm can meet the insulation requirements, but in actual process, it will be affected by many factors. First, the spraying environment is not a dust-free workshop, and dust and other particulate matter will mix into the insulating paint. Second, the larger the spraying area, the higher the probability of dust and other particulate matter being mixed. Third, the heat exchange assembly surface has a concave-convex structure, the thickness of the insulating paint is uneven, and weak points are easily formed. The above factors will affect the insulation effect of the insulating paint. As the voltage increases, impurities such as particles are easily broken down, forming a burst point, and ultimately causing insulation failure.

[0075] Based on the insulating paint scheme, in another related art, the insulation strength is increased by increasing the thickness of the insulating paint sprayed at one time. Specifically, 300 μm to 400 μm of insulating paint is sprayed at one time on a sample of 5 heat exchange assemblies, and the length of the sample is 2.2 meters and the width is 1.2 meters. Then test, test standard: within 10 seconds, the voltage is increased to the target voltage 9300 volts, and maintained for 60 seconds, then the voltage is decreased to 0.5 seconds and ended, and the detection result finally needs to meet the leakage current less than or equal to 1 milliampere. However, after the final detection, it is found that the leakage current is too high when the voltage is between 5000 volts and 7000 volts, so it cannot meet the test standard.

[0076] In another related art, based on the insulating paint solution, a secondary spraying of insulating paint is adopted, specifically, a first layer of insulating paint is sprayed first, and after the first layer of insulating paint is baked and cured, a second layer of insulating paint is sprayed again, and then baked and cured to form a double-layer insulating paint structure. The thickness of the double-layer insulating paint structure can reach 400-600 pm, but this case has the following problems: first, after the first layer of insulating paint is cured, the first layer of insulating paint will be contaminated by dust, oil stains and other impurities in the environment, so after spraying the second layer of insulating paint, there will be a pollution superposition problem; second, since the secondary spraying involves heat exchange component flow problems, it increases the probability of dust and other particulate matter mixing; third, the bonding force between the two layers of insulating paint is poor, and delamination, blistering and other problems are easy to occur, which can easily lead to local insulation failure. After the above similar verification, in the case of a voltage of 2900-7000 volts, five samples all failed, with excessive leakage current, so it does not meet the test standard. In combination with the above single spraying and double-layer spraying tests, it can be concluded that increasing the thickness of the insulating paint does not necessarily improve the insulation performance, and insulation failure problems still occur.

[0077] In addition, in combination with the above argument and industry standards, it is known that in mass production, an insulating paint thickness of 110-210 pm can only guarantee a withstand voltage requirement of less than or equal to 1500 volts; an insulating paint thickness of 150-250 pm can only guarantee a withstand voltage requirement of 1500-3000 volts; an insulating paint thickness of 180-300 pm can only guarantee a withstand voltage requirement of 3000-4500 volts; an insulating paint thickness of 300-400 pm can only guarantee a withstand voltage requirement of 4500-5700 volts, and within the insulation range of 5700-9300 volts, there is no single insulating paint that can achieve stable mass production.

[0078] The second way is to attach a flexible insulating film to the surface of the heat exchange assembly close to the battery monomer assembly to achieve insulation. In theory, an insulating film with a thickness of 100 pm and no wrinkles, bubbles or damage can meet the insulation requirements of 9300 volts and a leakage current of less than or equal to 1 mA, but in actual production, when one of the length and width of the heat exchange assembly is greater than or equal to 1 meter, or when the heat exchange assembly has a non-planar structure such as a recess, a protrusion or a flange, the film attachment process will inevitably produce wrinkles, bubbles, edge lifting and local damage, which can easily lead to insulation failure. Moreover, the flexible insulating film is easily damaged or pierced by metal burrs on the heat exchange assembly during attachment, which can also cause insulation failure.

[0079] Based on this, this application provides a battery device, which includes a housing, a battery cell assembly, a heat exchange assembly, and an insulating structure. The battery cell assembly is disposed within the housing. The heat exchange assembly is disposed within the housing, and the battery cell assembly is supported on one side of the heat exchange assembly along a first direction. The heat exchange assembly is used for heat exchange with the battery cell assembly. Along the first direction, the insulating structure is disposed between the battery cell assembly and the heat exchange assembly. The insulating structure includes an insulating coating and at least one insulating film layer. Along the extension direction of the insulating film layer, the insulating film layer includes multiple sub-films. At least a portion of the sub-films and the insulating coating are stacked along the first direction. The sub-films and the insulating coating in the insulating film layer are used to insulate the heat exchange assembly and the battery cell assembly.

[0080] Through the above configuration, the enclosure provides housing space and physical protection for the battery cell assembly and heat exchange assembly. The heat exchange assembly can exchange heat with the battery cell assembly to regulate its temperature, such as by cooling it. Since the insulation structure between the battery cell assembly and the heat exchange assembly includes an insulating film layer and an insulating coating, and the insulating film layer comprises multiple sub-films, with at least a portion of the sub-films and insulating coating stacked together, the stacked sub-films and insulating coating can provide dual insulation. Furthermore, because the insulating coating and insulating film are formed in different ways—the insulating film is a pre-fabricated thin-film structure, the sub-films are also pre-fabricated thin-film structures, and the insulating coating is formed by spraying—even if either the insulating coating or the insulating film has an insulation defect, they can compensate for each other to achieve better insulation. This effectively copes with ultra-high voltage or conventional voltage conditions, ensuring the insulation reliability between the battery cell assembly and the heat exchange assembly, guaranteeing the reliability of the battery device, and facilitating mass production.

[0081] In addition, since the insulating film layer is composed of multiple sub-films, multiple sub-films can be applied individually when applying the insulating film layer. The application process between the multiple sub-films is relatively independent and will not interfere with each other, which improves the convenience of application.

[0082] The solutions in this application can be applied to electrical equipment, such as aircraft, spacecraft, electric vehicles, electric cars, ships, etc. Aircraft can include airplanes, rockets, space shuttles, and spacecraft.

[0083] For ease of explanation, the mobile electrical device of this application is exemplarily described using a vehicle 1000 as an example.

[0084] Figure 1 The diagram illustrates the structure of a vehicle as provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended vehicles, etc. Figure 1As shown, the interior of the vehicle 1000 is provided with a battery apparatus 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery apparatus 100 can be used for power supply of the vehicle 1000, for example, the battery apparatus 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 being used to control the battery apparatus 100 to supply power to the motor 300, for example, for the power demand of the vehicle 1000 during starting, navigation and driving.

[0085] In some embodiments of the present application, the battery apparatus 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0086] Further exemplarily, the power consuming equipment in an embodiment of the present application includes an aircraft.

[0087] The aircraft generally refers to an instrument flying in the atmosphere or in the space (space) outside the atmosphere, which can include an aircraft flying in the atmosphere and a spacecraft flying in the space.

[0088] The aircraft can include an airplane, an airship, etc., and exemplarily can be a low-altitude aircraft, an eVTOL (electric Vertical Take-off and Landing) aircraft, a commuter aircraft, a regional aircraft, etc.

[0089] The spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0090] The aircraft generally includes a body (cabin shell), and a battery apparatus 100 arranged on the body and providing electric energy for the body.

[0091] The battery apparatus 100 (Battery Apparatus) mentioned in the embodiments of the present application can include a plurality of battery cell assemblies 120 for providing voltage and capacity. The battery cell assembly 120 (Battery Cell Assembly) can include a plurality of battery cells 121 connected in series, in parallel or in a mixed manner by a busbar.

[0092] In some embodiments, the battery cell assembly 120 (Battery Cell Assembly) is generally formed by arranging a plurality of battery cells 121; as an example, the battery cell assembly 120 can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells by a cable tie.

[0093] In some embodiments, as shown in FIG. 1, the battery device 100 can be a battery pack, which includes a box 110 and a plurality of battery cell assemblies 120 accommodated in the box. Figure 2

[0094] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0095] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., which are not limited in the embodiments of the present application.

[0096] The battery cell includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator disposed between the negative electrode and the positive electrode. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time, the active ions can pass through.

[0097] In some examples, the battery cell includes a housing, and the electrode assembly is located in the housing.

[0098] In some examples, the battery cell includes an electrode terminal, the electrode terminal is mounted on the housing, and the electrode terminal is electrically connected with the electrode assembly.

[0099] In some examples, the box 110 in the present application is formed by buckling a first box part 111 and a second box part 112, and a receiving cavity for accommodating the battery cell assembly 120 is formed between the two box parts.

[0100] The following will be described with reference to Figures 3 to 16 Some embodiments of the present application will be described in detail.

[0101] Figure 3 FIG. 1 is a schematic diagram of the internal structure of a battery device provided by an embodiment of the present application. Figure 4 FIG. 2 is a schematic diagram of the internal structure of a battery device provided by an embodiment of the present application. Figure 3 FIG. 3 is a schematic diagram of the cross-section at A-A in FIG. 2. Figure 5 FIG. 4 is a schematic diagram of the cross-section of the battery device provided by an embodiment of the present application, in which the insulating coating layer is located between the insulating film layer and the heat exchange assembly in the first direction. Figure 6 FIG. 5 is a schematic diagram of the cross-section of the battery device provided by an embodiment of the present application, in which the insulating film layer is located between the insulating coating layer and the heat exchange assembly in the first direction. Figure 7 FIG. 6 is a schematic diagram of the cross-section of the battery device provided by an embodiment of the present application, in which the insulating coating layer is located between the multilayer insulating film layer and the heat exchange assembly in the first direction. Figure 8 ​is a sectional view of the application provided by the insulation film layer along the first direction multilayer insulation film layer between the insulation coating and the heat exchange assembly. Figure 9 is a top view of the application provided by the insulation film layer including a plurality of sub-films. Figure 10 is Figure 9 is a sectional view of the application provided by the insulation film layer along the first direction multilayer insulation film layer between the insulation coating and the heat exchange assembly. Figure 11 is a top view of the application provided by the heat exchange assembly without insulation structure. Figure 12 is a first top view of the application provided by the heat exchange assembly with insulation structure. Figure 13 is a top view of the application provided by the heat exchange assembly with battery monomer assembly. Figure 14 is a second top view of the application provided by the heat exchange assembly with insulation structure. Figure 15 is a sectional view of the application provided by the insulation coating including a first weak area. Figure 16 is a sectional view of the application provided by the insulation film layer including a second weak area.

[0102] For ease of illustration, the application sets the first direction, the second direction and the third direction, the first direction, the second direction and the third direction intersect with each other, in order to facilitate the description and the indication, exemplarily, the application takes the first direction, the second direction and the third direction perpendicular to each other as an example to describe, exemplarily, the first direction is the direction of the heat exchange assembly carrying the battery monomer assembly, the first direction can also be considered as the height direction of the battery monomer in the battery monomer assembly, the second direction is the arrangement direction of the plurality of battery monomer assemblies, and the third direction is the stacking direction of the plurality of battery monomers in the battery monomer assembly.

[0103] In some embodiments of the application, as Figure 3 , Figure 4 shown, a battery device 100 is provided, the battery device 100 includes a box body 110, a battery monomer assembly 120, a heat exchange assembly 130 and an insulation structure 140, the battery monomer assembly 120 is arranged in the box body 110. The heat exchange assembly 130 is arranged in the box body 110, the battery monomer assembly 120 is carried on one side of the heat exchange assembly 130 along the first direction X, and the heat exchange assembly 130 is used for heat exchange with the battery monomer assembly 120. Along the first direction X, the insulation structure 140 is arranged between the battery monomer assembly 120 and the heat exchange assembly 130, the insulation structure 140 includes an insulation coating 142 and at least one insulation film layer 141, along the extension direction of the insulation film layer 141, the insulation film layer 141 includes a plurality of sub-films 1413, and the sub-film 1413 and at least part of the insulation coating 142 are arranged in layers along the first direction X, the sub-film 1413 in the insulation film layer 141 and the insulation coating 142 are all used for insulating the heat exchange assembly 130 and the battery monomer assembly 120.

[0104] In some examples, the heat exchange assembly 130 exchanges heat with the battery monomer assembly 120 via the insulation structure 140, that is, the insulation structure 140 needs to have the performance of heat exchange, which balances the insulation function and the heat exchange function of the insulation structure 140. For the high heat exchange area on the heat exchange assembly 130, the thickness of at least one of the insulation film layer 141 and the insulation coating layer 142 in the insulation structure 140 in the high heat exchange area can be thinned, so as to reduce the thermal resistance and guarantee the heat exchange efficiency between the battery monomer assembly 120 and the heat exchange assembly 130. For example, the high heat exchange area can be the area corresponding to the battery monomer 121 in the battery monomer assembly 120.

[0105] In some examples, as shown in Figure 4 The heat exchange assembly 130 has a plurality of flow channels inside. The plurality of flow channels are arranged at intervals along the second direction Y and penetrate the heat exchange assembly 130 along the third direction Z. The flow channels have heat exchange medium flowing therein, and the heat exchange medium flows to exchange heat with the battery monomer assembly 120. The heat exchange assembly 130 has a flow collecting component at each of the two opposite ends along the third direction Z. The flow collecting component has a flow collecting space inside. The flow collecting space is in communication with at least part of the end of the flow channel corresponding to the end. The flow collecting space is also in communication with the heat exchange medium outside. Thus, the plurality of flow channels can be connected in series or in parallel through the flow collecting space of the two flow collecting components, so as to guarantee the flow of the heat exchange medium between the plurality of flow channels and realize heat exchange.

[0106] Exemplarily, the heat exchange assembly 130 includes a first plate body 131 and a second plate body 132. Along the first direction X, the side of the first plate body 131 close to the battery monomer assembly 120 has a plurality of recessed first groove bodies a. The plurality of first groove bodies a are arranged at intervals along the second direction Y and penetrate the first plate body 131 along the third direction Z. The second plate body 132 is connected between the first plate body 131 and the battery monomer assembly 120 along the first direction X. The second plate body 132 blocks the groove opening of the first groove body a along the first direction X to form a plurality of flow channels. In this case, the battery monomer assembly 120 is carried on the side of the second plate body 132 away from the first plate body 131.

[0107] Exemplarily, in order to guarantee the uniform thickness of the first plate body 131, a second groove body b is further formed on the side of the first plate body 131 away from the second plate body 132. Along the second direction Y, the first groove body a and the second groove body b are arranged alternately. Through the arrangement of the first groove body a and the second groove body b, the thickness of the first plate body 131 can be balanced. The second plate body 132 can be a plate-shaped structure with uniform thickness along the first direction X.

[0108] In order to facilitate the formation of the first groove body a and the second groove body b, the first plate body 131 with the first groove body a and the second groove body b can be formed by punching or integrated die casting.

[0109] In the first direction X, the insulation structure 140 is arranged between the battery monomer assembly 120 and the heat exchange assembly 130, which means that the insulation structure 140 is connected to the heat exchange assembly 130, and then the battery monomer assembly 120 is carried on the insulation structure 140.

[0110] It should be explained that the insulation structure 140 includes an insulation film layer 141 and an insulation coating layer 142 formed in different ways. The different formation ways mean that the insulation film layer 141 can be a preformed film structure formed by flow casting process, calendering process and other technologies, while the insulation coating layer 142 is formed by spraying and other technologies. At least part of the insulation film layer 141 and at least part of the insulation coating layer 142 are laminated, which can be that the insulation coating layer 142 is sprayed on the side of the heat exchange assembly 130 close to the battery monomer assembly 120, and then the insulation film layer 141 is attached to the side of the insulation film layer 141 away from the heat exchange assembly 130; or, the insulation film layer 141 is attached to the side of the heat exchange assembly 130 close to the battery monomer assembly 120, and then the insulation coating layer 142 is sprayed on the side of the insulation film layer 141 away from the battery monomer assembly 120.

[0111] In some examples, the insulation film layer 141 can be a flexible insulation film, for example, the insulation film layer 141 can be a polyethylene film, a polypropylene film, a polycarbonate film, a polyimide (PI) blue film, a polyethylene terephthalate (PET) film or other high-performance engineering plastic film.

[0112] The number and shape of the sub-film 1413 can be selected and arranged as needed. For example, the number of sub-films 1413 can be two, three, four or five, etc. The shape of the sub-film 1413 can be a regular shape such as square, circle or ellipse, of course, the shape of the sub-film 1413 can also be an irregular shape.

[0113] In addition, along the extension direction of the insulation film layer 141, adjacent sub-films 1413 can be arranged with intervals; or, adjacent sub-films 1413 can also be arranged in close contact; or, along the first direction X, the projections of adjacent sub-films 1413 on the same projection plane can also partially overlap.

[0114] In some examples, 300-400 μm of the insulating coating 142 is first coated on one side of the heat exchange assembly 130 carrying the battery cell assembly 120, and then a plurality of sub-films 1413 are attached on the insulating coating 142 by hot pressing, UV, or other techniques to form the insulating structure 140. The insulating structure 140 can meet the insulation requirements of 9300 volts and a leakage current of less than or equal to 1 milliampere, and has a high yield in mass production when tested according to the test standards in related technologies.

[0115] In some examples, when the insulating film layer 141 is set, hot pressing, cold sticking, and ultraviolet curing (UV) processes can be used, in which the hot pressing serves to bond the insulating film layer 141 and the insulating coating 142, or bond the insulating film layer 141 and the heat exchange assembly 130; the cold sticking is used for surface treatment of the insulating film layer 141; and the ultraviolet curing is used for light treatment of the insulating film layer 141 locally or as a whole to ensure the insulation effect of the insulating film layer 141.

[0116] In some examples, after the sub-film 1413 in the insulating film layer 141 and the insulating coating 142 are stacked and set, the sub-film 1413 in the insulating film layer 141 and the insulating coating 142 can be bonded and fixed by adhesive, or attached to the insulating film layer 141 by the adhesion force of the insulating coating 142 during spraying, so as to have a certain bonding strength therebetween, thereby ensuring the relative stability between the insulating film layer 141 and the insulating coating 142, the structural stability of the whole, and the insulation performance.

[0117] In some examples, after the insulating structure 140 is set on the heat exchange assembly 130, various aging impact tests can be performed on the insulating structure 140 and the heat exchange assembly 130 as a whole, and after the tests are completed, the insulating structure 140 still needs to meet the insulation requirements. The aging impact tests can include natural exposure tests, ultraviolet aging tests, and hot air aging tests, etc.

[0118] In some examples, the insulating coating 142 can be an insulating paint layer, such as an epoxy insulating paint layer, a silicone insulating paint layer, or a water-based insulating paint layer, etc. After the insulating coating 142 is sprayed, the insulating coating 142 can be cured by high temperature (e.g., a temperature of about 200°C).

[0119] Through the above arrangement, the box body 110 provides a containing space and physical protection for the battery monomer assembly 120 and the heat exchange assembly 130, and the heat exchange assembly 130 can exchange heat with the battery monomer assembly 120 to adjust the temperature of the battery monomer assembly 120, for example, to cool the battery monomer assembly 120. Since the insulating structure 140 arranged between the battery monomer assembly 120 and the heat exchange assembly 130 includes the insulating film layer 141 and the insulating coating layer 142, and the insulating film layer 141 includes a plurality of sub-films 1413, and the plurality of sub-films 1413 and the insulating coating layer 142 are at least laminated, the laminated sub-films 1413 and the insulating coating layer 142 can play a double insulation role, and since the insulating coating layer 142 and the insulating film layer 141 are formed in different ways, the insulating film layer 141 is a pre-made film structure, the sub-film 1413 is also a pre-made film structure, and the insulating coating layer 142 is formed by spraying, so even if any one of the insulating coating layer 142 and the insulating film layer 141 has an insulation defect, they can compensate for each other, effectively cope with ultra-high voltage or conventional voltage conditions, achieve better insulation effect, ensure the insulation reliability between the battery monomer assembly 120 and the heat exchange assembly 130, and ensure the reliability of the battery device 100, and is also conducive to mass production.

[0120] In addition, since the insulating film layer 141 is composed of a plurality of sub-films 1413, when attaching the insulating film layer 141, the plurality of sub-films 1413 can be attached separately, and the attachment process between the plurality of sub-films 1413 is relatively independent and will not interfere, improving the convenience of attachment.

[0121] The laminated arrangement of the insulating coating layer 142 and the insulating film layer 141 will be described below.

[0122] In some embodiments of the present application, as shown in Figure 4 In the first direction X, the insulating coating layer 142 is coated on the side of the heat exchange assembly 130 carrying the battery monomer assembly 120, and the sub-film 1413 in the insulating film layer 141 is attached to the side of the insulating coating layer 142 away from the heat exchange assembly 130.

[0123] In some examples, the insulating coating layer 142 can be coated on the side of the heat exchange assembly 130 carrying the battery monomer assembly 120 by any suitable means such as spraying process, coating process or brushing process.

[0124] In some examples, the sub-film 1413 in the insulating film layer 141 can be attached and connected to the insulating coating layer 142 by means of gluing, electrostatic adsorption or mechanical clamping. In order to ensure the convenience of arranging the sub-film 1413 in the insulating film layer 141, the sub-film 1413 in the insulating film layer 141 needs to be arranged after the insulating coating layer 142 is cured after being coated on the heat exchange assembly 130.

[0125] Through the above arrangement, the insulating coating 142 is first coated on the heat exchange assembly 130, and then the sub-film 1413 in the insulating film layer 141 is attached on the insulating coating 142 to form the insulating structure 140. Since the insulating coating 142 is located between the sub-film 1413 in the insulating film layer 141 and the heat exchange assembly 130, the insulating film layer 141 can provide additional protection for the insulating coating 142 against wear and tear, and can better resist the influence of environmental factors such as moisture and corrosive gases, thereby ensuring the overall insulating reliability of the insulating structure 140. In addition, since the insulating coating 142 is coated first, and the insulating film layer 141 needs to be attached after the insulating coating 142 is dried, the insulating film layer 141 will not be disturbed during the drying process of the insulating coating 142, and the insulating reliability of the insulating film layer 141 can be ensured.

[0126] In some embodiments of the present application, as shown in Figure 5 The insulating structure 140 further includes a first adhesive layer 143, which is adhered between the insulating coating 142 and the sub-film 1413 in the insulating film layer 141 along the first direction X.

[0127] It can be understood that, in order to ensure that the heat exchange assembly 130 and the battery monomer assembly 120 can exchange heat through the insulating structure 140, the first adhesive layer 143 needs to have heat conduction performance.

[0128] The first adhesive layer 143 can be an adhesive layer that is self-provided on the sub-film 1413 in the insulating film layer 141, or the first adhesive layer 143 can be an adhesive layer that is independent of the insulating coating 142 and the sub-film 1413 in the insulating film layer 141.

[0129] In some examples, the first adhesive layer 143 can include double-sided tape with a substrate or solvent-based, solid or semi-solid adhesive without a substrate.

[0130] The first adhesive layer 143 can include an insulating acrylic adhesive, which has the characteristics of strong insulating performance and environmental protection. Alternatively, the first adhesive layer 143 can include a silicon-based pressure-sensitive adhesive, which has the advantages of high temperature resistance and good insulating performance, which is conducive to heat exchange and insulation between the heat exchange assembly 130 and the battery monomer assembly 120.

[0131] In some examples, the bonding strength of the insulating coating 142 and the insulating film layer 141 after bonding via the first adhesive layer 143 can be greater than or equal to 9 (MPa) megapascals, which can ensure the relative stability and firmness of the fixed insulating coating 142 and the insulating film layer 141, and ensure the insulating stability.

[0132] Through the above arrangement, the sub-film 1413 in the insulating film layer 141 can be attached and fixed on the insulating coating layer 142 by the first adhesive layer 143, so as to guarantee the close adhesion of the sub-film 1413 in the insulating film layer 141 and the insulating coating layer 142, guarantee the insulation reliability, and also reduce the probability of bubbles in the sub-film 1413 in the insulating film layer 141, reduce the probability of increasing the heat transfer resistance between the battery monomer assembly 120 and the heat exchange assembly 130 due to the existence of bubbles, guarantee that the battery monomer assembly 120 and the heat exchange assembly 130 can exchange heat at high efficiency through the insulating film layer 141 and the insulating coating layer 142, and also guarantee the uniformity of heat exchange, and balance the heat transfer performance and insulation performance between the battery monomer assembly 120 and the heat exchange assembly 130.

[0133] In some embodiments of the present application, as shown in Figure 6 along the first direction X, the sub-film 1413 in the insulating film layer 141 is attached to the side of the heat exchange assembly 130 carrying the battery monomer assembly 120, and the insulating coating layer 142 is coated on the side of the sub-film 1413 in the insulating film layer 141 away from the heat exchange assembly 130.

[0134] In some examples, the insulating film layer 141 can be attached and connected to the heat exchange assembly 130 by means of adhesion, electrostatic adsorption or mechanical clamping.

[0135] In some examples, the insulating coating layer 142 can be coated on the side of the sub-film 1413 in the insulating film layer 141 away from the heat exchange assembly 130 by any suitable means such as spraying process, coating process or brushing process. In order to facilitate the adhesion of the insulating coating layer 142 to the sub-film 1413 in the insulating film layer 141, the insulating coating layer 142 can be treated by plasma activation or the like. The plasma activation treatment can improve the surface energy (adhesion) of the insulating coating layer 142, so as to guarantee that the insulating coating layer 142 can be stably attached to the sub-film 1413 in the insulating film layer 141, guarantee the stability of the combination of the insulating coating layer 142 and the sub-film 1413 in the insulating film layer 141, and guarantee the insulation performance of the insulating structure 140.

[0136] Through the above arrangement, the sub-film 1413 in the insulating film layer 141 is first attached to the heat exchange assembly 130, and then the insulating coating layer 142 is coated on the sub-film 1413 in the insulating film layer 141 to form the insulating structure 140. Since the insulating film layer 141 is located between the insulating coating layer 142 and the heat exchange assembly 130, the insulating coating layer 142 can provide additional protection against scratching for the sub-film 1413 in the insulating film layer 141, so as to guarantee the uniformity and reliability of the insulating structure 140 as a whole.

[0137] In some embodiments of the present application, as shown in Figure 6As shown, the insulation structure 140 further comprises a second adhesive layer 144, which is adhered between the heat exchange assembly 130 and the sub-film 1413 in the insulation film layer 141 along the first direction X.

[0138] It can be understood that, in order to guarantee that the heat exchange assembly 130 and the battery monomer assembly 120 can exchange heat through the insulation structure 140, the second adhesive layer 144 needs to have heat conduction performance.

[0139] In some examples, the second adhesive layer 144 can include double-sided adhesive tape with a substrate or solvent-based, solid or semi-solid adhesive without a substrate.

[0140] The second adhesive layer 144 can include an insulation type acrylic adhesive, which has the characteristics of strong insulation performance and environmental protection. Alternatively, the second adhesive layer 144 can also include a silicon-based pressure-sensitive adhesive, which has the advantages of high temperature resistance and good insulation performance, which is conducive to heat exchange and insulation between the heat exchange assembly 130 and the battery monomer assembly 120.

[0141] Through the above arrangement, the second adhesive layer 144 can be used to attach and fix the sub-film 1413 in the insulation film layer 141 to the heat exchange assembly 130, guaranteeing that the insulation film layer 141 and the heat exchange assembly 130 are closely attached, and further guaranteeing the flatness of the insulation coating 142 coated on the sub-film 1413 in the insulation film layer 141, guaranteeing the overall insulation reliability of the insulation structure 140. In addition, it can also reduce the probability of bubbles in the sub-film 1413 in the insulation film layer 141, reduce the probability of increased heat transfer resistance between the battery monomer assembly 120 and the heat exchange assembly 130 due to the existence of bubbles, guarantee that the battery monomer assembly 120 and the heat exchange assembly 130 can exchange heat at high efficiency through the sub-film 1413 in the insulation film layer 141 and the insulation coating 142, and further guarantee the uniformity of heat exchange, taking into account the heat transfer performance and insulation performance between the battery monomer assembly 120 and the heat exchange assembly 130.

[0142] In some embodiments of the present application, as shown in Figure 7 , Figure 8 The insulation film layer 141 has multiple layers, and the multiple insulation film layers 141 are arranged in layers along the first direction X.

[0143] The sub-films 1413 in adjacent insulation film layers 141 can be fixed by adhesion, electrostatic adsorption or mechanical clamping, etc. along the first direction X.

[0144] In addition, the number of layers of the insulation film layer 141 can be two, three, four or five, etc.

[0145] In some examples, as shown in Figure 7As shown, along the first direction X, the insulating coating 142 is coated on the side of the heat exchange assembly 130 carrying the battery monomer assembly 120, and the laminated multi-layer insulating film layer 141 is integrally attached to the side of the insulating coating 142 away from the heat exchange assembly 130, and the first adhesive layer 143 is adhered between the adjacent insulating coating 142 and the sub-film 1413 in the insulating film layer 141.

[0146] In some examples, as shown in FIG. 1B, along the first direction X, the laminated multi-layer insulating film layer 141 is integrally attached to the side of the heat exchange assembly 130 carrying the battery monomer 121, at this time, the second adhesive layer 144 is closest to the sub-film 1413 in the insulating film layer 141 and the heat exchange assembly 130, and then the insulating coating 142 is coated on the insulating film layer 141 farthest away from the heat exchange assembly 130. Figure 8

[0147] Through the above arrangement, the insulating coating 142 and the multi-layer insulating film layer 141 are arranged in a laminated manner along the first direction X to form the insulating structure 140, which improves the insulation performance of the insulating structure 140, guarantees the insulation reliability between the battery monomer assembly 120 and the heat exchange assembly 130, and guarantees the reliability of the battery device 100.

[0148] In some embodiments of the present application, as shown in FIG. 1B, along the first direction X, at least two of the adjacent sub-films 1413 overlap with each other. Figure 10

[0149] That is, along the first direction X, the projection of at least two of the adjacent sub-films 1413 overlaps in the same projection plane.

[0150] The number of adjacent sub-films 1413 can be determined according to the number of sub-films 1413, the arrangement of the sub-films 1413, etc., for example, it can be adjacent two sub-films 1413, adjacent three sub-films 1413, or adjacent four sub-films 1413, etc.

[0151] In addition, when at least two of the adjacent sub-films 1413 overlap with each other along the first direction X, they can be fixed by means of adhesion or electrostatic adsorption, etc.

[0152] Through the above arrangement, at least two of the adjacent sub-films 1413 overlap with each other along the first direction X, not only the independence of the attachment of multiple sub-films 1413 is retained, but also the tightness between at least two of the adjacent sub-films 1413 is taken into account, which guarantees the insulation performance of the joint of the adjacent sub-films 1413, and further guarantees the insulation performance of the insulating film layer 141 as a whole, and guarantees the insulation reliability between the battery monomer assembly 120 and the heat exchange assembly 130.

[0153] In some embodiments of the present application, as shown in FIG. 1B, along the first direction X, at least two of the adjacent sub-films 1413 overlap with each other. Figure 11 ,​​Figure 12 As shown, along the first direction X, the heat exchange assembly 130 comprises a bearing surface 133 located on the side where the battery monomer assembly 120 is located, along the extension direction of the bearing surface 133, the bearing surface 133 comprises a planar region 1331 and a concave-convex region 1332, the extension direction of the planar region 1331 is perpendicular to the first direction X, at least part of the concave-convex region 1332 is recessed and / or protruded relative to the planar region 1331. The insulation film layer 141 further comprises an avoiding region 1411 penetrating along the first direction X, along the first direction X, the projection of the sub-film 1413 in the insulation film layer 141 overlaps the projection of the planar region 1331, the projection of the avoiding region 1411 overlaps the projection of the concave-convex region 1332, and the projection of the insulation coating layer 142 overlaps the projection of the planar region 1331 and the projection of the concave-convex region 1332.

[0154] Wherein, along the first direction X, the projection of the sub-film 1413 in the insulation film layer 141 overlaps the projection of the planar region 1331, the projection of the avoiding region 1411 overlaps the projection of the concave-convex region 1332, and the projection of the insulation coating layer 142 overlaps the projection of the planar region 1331 and the projection of the concave-convex region 1332. There can be two implementation cases as follows.

[0155] In the first implementation case, the insulation coating layer 142 is located between the sub-film 1413 in the insulation film layer 141 and the bearing surface 133, that is, the insulation coating layer 142 is coated on the planar region 1331 and the concave-convex region 1332 first, then the sub-film 1413 in the insulation film layer 141 is attached to the side of the insulation coating layer 142 corresponding to the planar region 1331 away from the heat exchange assembly 130, and the avoiding region 1411 on the insulation film layer 141 is opposite to the concave-convex region 1332 in the first direction X. Since the avoiding region 1411 is arranged penetratingly along the first direction X, the concave-convex arrangement of the concave-convex region 1332 will not affect the sub-film 1413 in the insulation film layer 141, and the overall attachment flatness of the insulation film layer 141 can be guaranteed. In this case, it can be considered that at least part of the insulation coating layer 142 and the sub-film 1413 in the insulation film layer 141 are arranged in a stack along the first direction X, and the part of the insulation coating layer 142 opposite to the avoiding region 1411 along the first direction X, that is, the part of the insulation coating layer 142 located in the concave-convex region 1332, is not arranged in a stack with the sub-film 1413 in the insulation film layer 141.

[0156] In the second implementation, the sub-film 1413 in the insulating film layer 141 is located between the insulating coating layer 142 and the bearing surface 133, that is, the sub-film 1413 in the insulating film layer 141 is first attached to the planar region 1331, and the avoiding region 1411 is opposite to the first direction X and the concave-convex region 1332, then the sub-film 1413 in the insulating film layer 141 on the planar region 1331 is coated with the insulating coating layer 142 on the side away from the heat exchange assembly 130, and the insulating coating layer 142 is coated in the concave-convex region 1332 to form the insulating structure 140. In this case, it can also be considered that at least part of the insulating coating layer 142 and the sub-film 1413 in the insulating film layer 141 are stacked in the first direction X, and part of the insulating coating layer 142 opposite to the avoiding region 1411 in the first direction X, that is, the part of the insulating coating layer 142 located in the concave-convex region 1332, is not stacked with the insulating film layer 141.

[0157] It can be understood that the extension direction of the planar region 1331 is perpendicular to the first direction X, which means that the planar region 1331 is a flat surface. At least part of the concave-convex region 1332 is recessed and / or protruded relative to the planar region 1331, which means that the concave-convex region 1332 can be provided with some protruding or recessed structures, for example, some hole-like structures, groove-like structures, etc.

[0158] Exemplarily, the concave-convex region 1332 is an area extending in the third direction Z, and has a plurality of protruding and / or recessed structures spaced apart in the third direction Z in the concave-convex region 1332, so that part of the concave-convex region 1332 is protruded and / or recessed in the first direction X.

[0159] Exemplarily, the entire concave-convex region 1332 is protruded and / or recessed in the first direction X relative to the planar region 1331.

[0160] Exemplarily, the battery monomer assembly 120 can be placed in the planar region 1331, and the concave-convex region 1332 can be used to place some components that assist the normal work of the battery monomer assembly 120, for example, some side heat exchangers other than the heat exchange assembly 130 can be placed in the concave-convex region 1332, and then the hole-like structures, groove-like structures, etc. in the concave-convex region 1332 can be used to fix the side heat exchangers and the heat exchange assembly 130.

[0161] Of course, in some examples, the concave-convex region 1332 can also be used to place the battery monomer assembly 120.

[0162] Through the above arrangement, the bearing surface 133 for bearing the battery monomer assembly 120 has a planar area 1331 and a concave-convex area 1332. Since the concave-convex area 1332 and the planar area 1331 are both provided with the insulating coating 142, the insulating coating 142 can guarantee the basic insulation requirement between the battery monomer assembly 120 and the heat exchange assembly 130. Since the projection of the battery monomer assembly 120 and the projection of the planar area 1331 overlap along the same projection plane in the first direction X, the sub-film 1413 in the insulating film layer 141 is only located in the range of the planar area 1331. Since the extension direction of the planar area 1331 is perpendicular to the first direction X, the flatness of the sub-film 1413 after being attached can be guaranteed, and the concave-convex area 1332 can be prevented from causing the sub-film 1413 in the insulating film layer 141 to wrinkle, thereby guaranteeing the insulation reliability of the insulating film layer 141.

[0163] In some embodiments of the present application, as shown in Figure 13 the projection of the battery monomer assembly 120 and the projection of the planar area 1331 overlap along the same projection plane in the first direction X.

[0164] That is, the battery monomer assembly 120 is placed in the planar area 1331.

[0165] Through the above arrangement, since the projection of the battery monomer assembly 120 and the projection of the planar area 1331 overlap, the battery monomer assembly 120 is borne on the planar area 1331. In this way, not only the placement stability of the battery monomer assembly 120 can be guaranteed, but also the insulation effect can be guaranteed by the double insulation of the sub-film 1413 in the insulating film layer 141 and the insulating coating 142 in the planar area 1331, thereby improving the reliability of the battery device 100.

[0166] In some embodiments of the present application, as shown in Figure 13 the number of battery monomer assemblies 120, the number of avoidance areas 1411, the number of planar areas 1331, and the number of concave-convex areas 1332 are all multiple. The multiple planar areas 1331 and the multiple concave-convex areas 1332 are alternately arranged along the second direction Y. The multiple planar areas 1331 are correspondingly arranged with the multiple battery monomer assemblies 120, and the multiple avoidance areas 1411 are correspondingly arranged with the multiple concave-convex areas 1332. The projection of the avoidance area 1411 and the projection of the corresponding concave-convex area 1332 overlap along the same projection plane in the first direction X, and the projection of the battery monomer assembly 120 and the projection of the corresponding planar area 1331 overlap. The first direction X intersects the second direction Y.

[0167] The number of the battery monomer assemblies 120 can be two, three, four, five or six, etc. The number of the avoidance areas 1411 can be two, three, four, five or six, etc. The number of the planar areas 1331 can be two, three, four, five or six, etc. The number of the concave-convex areas 1332 can be two, three, four, five or six, etc.

[0168] Exemplarily, the number of the battery monomer assemblies 120 and the number of the planar areas 1331 are both four, and the number of the avoidance areas 1411 and the number of the concave-convex areas 1332 are both three.

[0169] It can be understood that in this embodiment, the plurality of battery monomers 121 in the battery monomer assembly 120 located in the planar area 1331 can be stacked in any suitable direction.

[0170] Through the above arrangement, each battery monomer assembly 120 is arranged in the corresponding planar area 1331, so that the area where each battery monomer assembly 120 is located can have double insulation of the sub-film 1413 in the insulation film layer 141 and the insulation coating 142, and each concave-convex area 1332 corresponds to the avoidance area 1411, so that each concave-convex area 1332 will not affect the insulation film layer 141. Since the plurality of planar areas 1331 and the plurality of concave-convex areas 1332 are alternately arranged along the second direction Y, the plurality of battery monomer assemblies can be arranged at intervals along the second direction Y, so that the concave-convex area 1332 between any adjacent battery monomer assemblies 120 can be arranged with other components matched with the battery monomer assembly 120, which is beneficial to the spatial layout of the battery monomer assembly 120 and other components in the box 110.

[0171] In some embodiments of the present application, as shown in Figure 13 The battery monomer assembly 120 includes a plurality of battery monomers 121 stacked along the third direction Z, and the planar area 1331 and the concave-convex area 1332 are arranged along the third direction Z. The first direction X, the second direction Y and the third direction Z intersect with each other.

[0172] That is, the stacking direction of the plurality of battery monomers 121 in the battery monomer assembly 120 is consistent with the extension direction of the planar area 1331 and the concave-convex area 1332. Since the plurality of battery monomer assemblies 120 are arranged along the second direction Y, the space utilization inside the box 110 is improved.

[0173] It can be understood that in order to adapt to the extension of the concave-convex area 1332 along the third direction Z, the avoidance area 1411 is also arranged along the third direction Z, and whether the avoidance area 1411 extends through the insulation film layer 141 along the third direction Z can be selected as needed.

[0174] Through the above setting, the stacking direction of the battery cells 121 in the battery cell assembly 120 is consistent with the planar region 1331, so not only can the setting of the battery cell assembly 120 be met, but also the area of the bearing surface 133 along the second direction Y can be fully utilized, the space of the box body 110 along the second direction Y can be fully utilized, and the utilization rate of the space in the box body 110 is guaranteed. Since the concave-convex region 1332 also extends along the third direction Z, the concave-convex region 1332 can adapt to the stacking setting of the battery cells 121 in the battery cell assembly 120, and other components arranged in the concave-convex region 1332 between the battery cell assemblies 120 can be adapted to the battery cell assembly 120. Through the adaptation of the stacking direction of the battery cells 121 in the battery cell assembly 120 and the extension direction of the planar region 1331 and the concave-convex region 1332, the space utilization and the rationality of the space layout in the box body 110 can be considered.

[0175] In some embodiments of the present application, as shown in Figure 12 、 Figure 13 The avoidance region 1411 penetrates through the opposite sides of the insulating film layer 141 along the third direction Z.

[0176] That is, the avoidance region 1411 not only penetrates through the insulating film layer 141 along the first direction X, but also extends along the third direction Z to penetrate through the opposite sides of the insulating film layer 141.

[0177] In some examples, in the plane formed by the intersection of the second direction Y and the third direction Z, the insulating film layer 141 has a square structure, two adjacent sides of the square structure extend along the second direction Y and the third direction Z respectively, then a plurality of avoidance regions 1411 arranged along the second direction Y are arranged on the square structure, and each avoidance region 1411 extends along the third direction Z to penetrate through the opposite sides of the insulating film layer 141. In this way, the insulating film layer 141 is divided into a plurality of independent parts.

[0178] Among them, the avoidance region 1411 can be a regular long strip structure extending along the third direction Z, or the avoidance region 1411 can also be an irregular bent strip structure extending along the third direction Z. As long as the avoidance region 1411 as a whole has the trend of extending along the third direction Z.

[0179] Through the above setting, the avoidance region 1411 penetrates through the opposite sides of the insulating film layer 141 along the third direction Z to divide the insulating film layer 141 into a plurality of independent parts, and each part is attached to the corresponding planar region 1331. Since the plurality of parts do not interfere with each other, the plurality of parts can be attached respectively when the insulating film layer 141 is attached, so as to finally form the insulating film layer 141, which can reduce the influence of the concave-convex region 1332 on the attachment of the insulating film layer 141 and improve the convenience of attachment.

[0180] The avoidance area 1411 can be formed on the sub-film 1413, or the avoidance area 1411 can also be formed between adjacent sub-films 1413, which will be described below.

[0181] In some embodiments of the present application, at least part of the adjacent sub-films 1413 are spaced apart along the extension direction of the insulating film layer 141 to form the avoidance area 1411.

[0182] In some examples, the adjacent sub-films 1413 are spaced apart along the extension direction of the insulating film layer 141, and the avoidance area 1411 is formed between the adjacent sub-films 1413, so that the adhesion of the multiple sub-films 1413 is realized while the avoidance of the sub-film 1413 to the concave-convex area 1332 is realized, thereby guaranteeing the convenience of adhesion of the sub-film 1413 and the flatness of the adhesion of the sub-film 1413.

[0183] Through the above arrangement, at least part of the multiple sub-films 1413 are spaced apart to form the avoidance area 1411, which can realize the independence of the adhesion of the multiple sub-films 1413 and avoid the influence of the concave-convex area 1332 on the sub-film 1413, and also guarantee the convenience of adhesion of the sub-film 1413 and the flatness of the adhesion of the sub-film 1413.

[0184] In some embodiments of the present application, as shown in Figure 14 When projected along the first direction X to the same projection plane, the projection of the sub-film 1413 in the insulating film layer 141 and the projection of the insulating coating layer 142 are completely overlapped with the projection of the heat exchange assembly 130.

[0185] In other words, when projected along the first direction X to the same projection plane, the projection of the sub-film 1413 in the insulating film layer 141 and the projection of the insulating coating layer 142 are coincident with the projection of the heat exchange assembly 130. That is to say, the entire heat exchange assembly 130 is arranged on the surface of the battery monomer assembly 120, and the sub-film 1413 in the insulating film layer 141 and the insulating coating layer 142 are completely overlapped with the heat exchange assembly 130.

[0186] Through the above arrangement, the sub-film 1413 in the insulating film layer 141 and the insulating coating layer 142 are completely adhered to the side surface of the heat exchange assembly 130 close to the battery monomer assembly 120, which can guarantee the insulation reliability between the heat exchange assembly 130 and the battery monomer assembly 120 to the greatest extent.

[0187] In some embodiments of the present application, as shown in Figure 14 The heat exchange assembly 130 includes a bearing surface 133 arranged on the side of the battery monomer assembly 120 along the first direction X, and the extension direction of the bearing surface 133 is perpendicular to the first direction X.

[0188] That is, the bearing surface 133 is a planar structure perpendicular to the first direction X.

[0189] Through the above arrangement, since the extension direction of the bearing surface 133 is perpendicular to the first direction X, the bearing surface 133 is a plane, so not only can the bearing arrangement of the battery monomer assembly 120 be facilitated, but the close adhesion of the insulating film layer 141 and the flatness of the insulating coating 142 can be ensured, the overall insulation reliability of the insulating structure 140 can be ensured, in addition, the probability of bubbles in the insulating film layer 141 can be reduced, the probability of increased heat transfer thermal resistance between the battery monomer assembly 120 and the heat exchange assembly 130 due to the presence of bubbles can be reduced, the battery monomer assembly 120 and the heat exchange assembly 130 can be ensured. Higher efficiency heat exchange through the insulating film layer 141 and the insulating coating 142, and the uniformity of heat exchange can also be ensured, and the heat transfer performance and insulation performance between the battery monomer assembly 120 and the heat exchange assembly 130 are taken into account.

[0190] When the insulating film layer 141 and the insulating coating 142 are arranged in a stacked manner, in addition to the above-mentioned overall arrangement or local arrangement according to the flatness of the bearing surface 133, a second layer of insulating film (insulating coating 142 located on the side of the insulating film layer 141 away from the heat exchange assembly 130, or insulating film layer 141 located on the side of the insulating coating 142 away from the heat exchange assembly 130) can be selectively arranged in a local manner according to the voltage resistance of different positions of the first layer of insulating film (insulating film layer 141 or insulating coating 142 directly contacting the bearing surface 133 of the heat exchange assembly 130) when the first layer of insulating film is arranged.

[0191] In some embodiments of the present application, as shown in Figure 15 along the extension direction of the insulating coating 142, the insulating coating 142 includes a first weak area 1421, and along the first direction X, the sub-film 1413 in the insulating film layer 141 is attached to the side of the first weak area 1421 away from the heat exchange assembly 130. Or, as shown in Figure 16 along the extension direction of the insulating film layer 141, the sub-film 1413 in the insulating film layer 141 includes a second weak area 1412, and along the first direction X, the insulating coating 142 is coated on the side of the second weak area 1412 away from the heat exchange assembly 130.

[0192] In some examples, the insulating coating 142 is between the heat exchange assembly 130 and the sub-film 1413 in the insulating film layer 141. In this case, the insulating coating 142 is first coated on the heat exchange assembly 130 as a base film layer, then the insulating coating 142 is subjected to AC voltage withstand test or DC voltage withstand test to identify the areas of the insulating coating 142 that fail to insulate or have weak insulation to define as the first weak area 1421, then the sub-film 1413 in the insulating film layer 141 is made according to the shape of the first weak area 1421, and then the sub-film 1413 in the insulating film layer 141 with a specific shape is attached to the side of the first weak area 1421 away from the heat exchange assembly 130 to strengthen the insulation of the first weak area 1421, and finally the entire insulating structure 140 is subjected to voltage withstand test to obtain a qualified product. In this way, not only the insulation effect of the entire insulating structure 140 can be guaranteed, but also the consumption of the insulating film layer 141 can be controlled, the cost can be controlled, in addition, the weight of the entire insulating structure 140 can be controlled, which is conducive to the lightweight of the battery device 100. Moreover, the insulating structure 140 can occupy less space, and the energy density of the battery device 100 can be guaranteed.

[0193] In other examples, the sub-film 1413 in the insulating film layer 141 is between the heat exchange assembly 130 and the insulating coating 142. In this case, the sub-film 1413 in the insulating film layer 141 is first attached to the heat exchange assembly 130 as a base film layer, then the sub-film 1413 in the insulating film layer 141 is subjected to AC voltage withstand test or DC voltage withstand test to identify the areas of the sub-film 1413 in the insulating film layer 141 that fail to insulate or have weak insulation to define as the second weak area 1412, then the insulating coating 142 is coated in the second weak area 1412 to strengthen the insulation of the second weak area 1412, and finally the entire insulating structure 140 is subjected to voltage withstand test to obtain a qualified product. In this way, not only the insulation effect of the entire insulating structure 140 can be guaranteed, but also the consumption of the insulating coating 142 can be controlled, the cost can be controlled, in addition, the weight of the entire insulating structure 140 can be controlled, which is conducive to the lightweight of the battery device 100. Moreover, the insulating structure 140 can occupy less space, and the energy density of the battery device 100 can be guaranteed.

[0194] Through the above setting, the sub-film 1413 in the insulating film layer 141 can be additionally arranged on the first weak area 1421 on the insulating coating 142 according to needs, so as to supplement and enhance the insulation performance of the first weak area 1421 by the sub-film 1413 in the insulating film layer 141, thereby guaranteeing the insulation performance of the whole insulating structure 140, and taking into account the consumption of the sub-film 1413 in the insulating film layer 141 and the insulation performance of the insulating structure 140. Similarly, the insulating coating 142 can be additionally arranged on the second weak area 1412 on the sub-film 1413 in the insulating film layer 141 according to needs, so as to supplement and enhance the insulation performance of the second weak area 1412 by the insulating coating 142, thereby guaranteeing the insulation performance of the whole insulating structure 140, and taking into account the consumption of the insulating coating 142 and the insulation performance of the insulating structure 140.

[0195] In some embodiments of the present application, the thickness of the insulating coating 142 is in the range of 50 μm-400 μm.

[0196] In some examples, the thickness of the insulating coating 142 can be in the range of 50 μm-100 μm, 50 μm-150 μm, 100 μm-200 μm, 75 μm-155 μm, or 200 μm-400 μm, etc.

[0197] The thickness of the insulating coating 142 can be 50 μm, 80 μm, 120 μm, 130 μm, 170 μm, 190 μm, 200 μm, 300 μm, or 400 μm, etc.

[0198] In some examples, the thickness of the insulating coating 142 can be 50 μm. Through such a setting, the basic insulation performance can be guaranteed, and the consumption of the insulating coating 142 can be reduced, the cost can be controlled, and the weight of the insulating structure 140 can be controlled, which is beneficial to the lightweight of the battery device 100. Moreover, the occupied space of the insulating structure 140 can be small, and the energy density of the battery device 100 can be guaranteed.

[0199] In some examples, the thickness of the insulating coating 142 can be 400 μm. Through such a setting, the insulating coating 142 can have better insulation performance, and the insulation reliability of the battery device 100 can be improved.

[0200] The insulating coating 142 can be formed by one-time spraying, or can also be formed by two-time spraying.

[0201] Through the above setting, the insulation coating 142 thickness of the 50 pm lower limit value can guarantee the basic insulation performance, and also can reduce the consumption of the insulation coating 142, control the cost, control the weight of the insulation structure 140 at the same time, and realize the lightweight of the battery device 100. The insulation coating 142 thickness of the 400 pm upper limit value can guarantee that the insulation coating 142 has better insulation performance, and improves the insulation reliability of the battery device 100.

[0202] In some embodiments of the present application, the present application also provides a power utilization equipment, which comprises the battery device 100 in the present application.

[0203] Through the above setting, since the power utilization equipment comprises the battery device 100 in the present application, the insulation reliability between the battery monomer assembly 120 and the heat exchange assembly 130 can be guaranteed, and the reliability of the battery device 100 can be guaranteed.

[0204] In order to more clearly understand the present application, the battery device 100 in the present application is introduced in some embodiments.

[0205] The partial setting of the bearing surface 133 of the heat exchange assembly 130 is the sub-film 1413 in the insulation film layer 141 and the insulation coating 142: including the first kind, the pressure test is carried out, and the local insulation failure or insulation weakness occurs; the second kind, the bearing surface 133 comprises the plane area 1331 and the concave-convex area 1332.

[0206] The first kind: first, the insulation coating 142 is coated on the bearing surface 133 of the heat exchange assembly 130, and after the insulation coating 142 is cured, the insulation coating 142 is subjected to a pressure test to obtain a first weak area 1421 on the insulation coating 142, and the first weak area 1421 is cleaned, the sub-film 1413 in the insulation film layer 141 is pre-prepared according to the shape of the first weak area 1421, then the sub-film 1413 in the insulation film layer 141 is attached to the side of the first weak area 1421 away from the bearing surface 133, to form the insulation structure 140, and then the insulation structure 140 is subjected to a pressure test to obtain the insulation structure 140 meeting the requirements. For the case that the insulation film layer 141 is located between the insulation coating 142 and the bearing surface 133, the same steps can be analogized.

[0207] The second kind: the insulation coating 142 is coated in the plane area 1331 and the concave-convex area 1332, and then the sub-film 1413 in the insulation film layer 141 is attached in the plane area 1331 to form the insulation structure 140.

[0208] The whole setting of the bearing surface 133 of the heat exchange assembly 130 is the sub-film 1413 in the insulation film layer 141 and the insulation coating 142:

[0209] Without performing the pressure resistance test, when the bearing surface 133 is a planar structure perpendicular to the first direction X, the sub-film 1413 in the insulating film layer 141 and the insulating coating layer 142 are directly stacked on the bearing surface 133, and are projected to the same projection surface along the first direction X, so that the projection of the sub-film 1413 in the insulating film layer 141, the projection of the insulating coating layer 142, and the projection of the bearing surface 133 are overlapped.

[0210] The above merely provides an example of the present application, but is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, and improvement within the spirit and scope of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The application relates to a battery pack, comprising: a box body; a battery cell assembly arranged in the box body; a heat exchange assembly arranged in the box body, the battery cell assembly being carried on one side of the heat exchange assembly along a first direction, and the heat exchange assembly being used for heat exchange with the battery cell assembly; an insulation structure arranged between the battery cell assembly and the heat exchange assembly along the first direction, the insulation structure comprising an insulation coating and at least one insulation film layer, the insulation film layer comprising a plurality of sub-films along the extension direction of the insulation film layer, the sub-films and at least part of the insulation coating being arranged in a stack along the first direction, and the sub-films in the insulation film layer and the insulation coating being used for insulating the heat exchange assembly and the battery cell assembly.

2. The battery device according to claim 1, characterized by The insulation coating is coated on the side of the heat exchange assembly carrying the battery cell assembly along the first direction, and the sub-films in the insulation film layer are attached to the side of the insulation coating away from the heat exchange assembly.

3. The battery device of claim 2, wherein, The insulation structure further comprises a first adhesive layer arranged between the insulation coating and the sub-films in the insulation film layer along the first direction.

4. The battery device of claim 1, wherein The sub-films in the insulation film layer are attached to the side of the heat exchange assembly carrying the battery cell assembly along the first direction, and the insulation coating is coated on the side of the sub-films in the insulation film layer away from the heat exchange assembly.

5. The battery device of claim 4, wherein, The insulation structure further comprises a second adhesive layer arranged between the heat exchange assembly and the sub-films in the insulation film layer along the first direction.

6. The battery device according to any one of claims 1 to 5, wherein The insulation film layer has a plurality of layers, and the plurality of insulation film layers are arranged in a stack along the first direction.

7. The battery device according to any one of claims 1 to 5, wherein At least two adjacent sub-films are overlapped with each other along the first direction.

8. The battery device according to any one of claims 1 to 5, wherein The heat exchange assembly comprises a carrying surface arranged on the side of the battery cell assembly along the first direction, the carrying surface comprises a planar region and a concave-convex region along the extension direction of the carrying surface, the extension direction of the planar region is perpendicular to the first direction, and at least part of the concave-convex region is recessed and / or protruded relative to the planar region; The insulation film layer further comprises an avoiding region penetrating along the first direction, the projection of the sub-films in the insulation film layer overlaps with the projection of the planar region, the projection of the avoiding region overlaps with the projection of the concave-convex region, and the projection of the insulation coating overlaps with the projection of the planar region and the projection of the concave-convex region.

9. The battery device of claim 8, wherein, The projection of the battery cell assembly overlaps with the projection of the planar region along the first direction.

10. The battery device of claim 9, wherein, The number of the battery cell assemblies, the number of the avoiding regions, the number of the planar regions and the number of the concave-convex regions are all plural, the plurality of planar regions and the plurality of concave-convex regions are arranged alternately along a second direction, the plurality of planar regions are arranged correspondingly to the plurality of battery cell assemblies, and the plurality of avoiding regions are arranged correspondingly to the plurality of concave-convex regions. The projection of the avoiding area overlaps the projection of the corresponding concave-convex area, and the projection of the battery monomer assembly overlaps the projection of the corresponding planar area when projected along the first direction to the same projection plane. The first direction intersects the second direction.

11. The battery device of claim 10, wherein, The battery monomer assembly comprises a plurality of battery monomers arranged in a third direction, and the planar area and the concave-convex area are arranged in the third direction. The first direction, the second direction, and the third direction intersect each other.

12. The battery device of claim 11, wherein, The avoiding area penetrates through the opposite sides of the insulation film layer along the third direction.

13. The battery device of claim 8, wherein, At least part of adjacent sub-films are arranged in intervals along the extension direction of the insulation film layer to form the avoiding area.

14. The battery device of any one of claims 1-5, wherein, The projection of the sub-film in the insulation film layer and the projection of the insulation coating both completely overlap the projection of the heat exchange assembly when projected along the first direction to the same projection plane.

15. The battery device of claim 14, wherein, The heat exchange assembly comprises a bearing surface arranged on the side of the battery monomer assembly along the first direction, and the extension direction of the bearing surface is perpendicular to the first direction.

16. The battery device according to any one of claims 1-5, wherein, The insulation coating comprises a first weak area along the extension direction of the insulation coating, and the sub-film in the insulation film layer is attached to the side of the first weak area away from the heat exchange assembly along the first direction; or The sub-film in the insulation film layer comprises a second weak area along the extension direction of the insulation film layer, and the insulation coating is coated on the side of the second weak area away from the heat exchange assembly along the first direction.

17. The battery device of any one of claims 1-5, wherein, The thickness of the insulation coating is in the range of 50 μm-400 μm.

18. An electrical device, characterized by The battery device according to any one of claims 1-17 is used to provide electric energy. ​

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