Heat shields, battery devices and electrical equipment

Abstract

The utility model discloses a heat insulation board, a battery device and an electrical device, wherein the battery device comprises a box, a battery cell and a heat insulation board. The battery cell is arranged in the box; the heat insulation board is arranged between the battery cell and the box, and the heat insulation board comprises at least one composite unit, wherein the composite unit comprises a first plate body and a second plate body connected to each other, wherein one of the first plate body and the second plate body is a foamed phenolic material, and the other of the first plate body and the second plate body is a fiber reinforced material. The technical solution of the utility model enables the heat insulation board to have both good fireproof and heat-insulating properties and mechanical properties, so as to play a stable and effective role in fireproof and heat-insulating in the battery device.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a heat insulation board, a battery device and an electrical equipment. Background Art

[0002] During use, the battery device in the related art may suffer from thermal runaway due to short circuit or overcharge and discharge. Therefore, in order to reduce the damage range when thermal runaway occurs, a heat insulation board may be provided between the battery cell and the box.

[0003] However, the traditional heat insulation board can only meet the fireproof and heat insulation performance, and its mechanical performance is usually not high. The use environment in the battery device is relatively complex, which makes high requirements for the mechanical performance of the heat insulation board. Therefore, the traditional heat insulation board cannot perform stable fireproof and heat insulation work in the battery device because it cannot meet the mechanical performance requirements. Utility Model Content

[0004] The main purpose of the present application is to provide a battery device, aiming to make the heat insulation board have both good fireproof and heat-insulating properties and mechanical properties, so as to play a stable and effective role in fireproofing and heat-insulating in the battery device.

[0005] To achieve the above objectives, the battery device proposed in this application includes:

[0006] Box;

[0007] A battery cell, wherein the battery cell is arranged in the box; and

[0008] The heat insulation board is arranged between the battery cell and the box body. The heat insulation board includes at least one composite unit. The composite unit includes a first plate body and a second plate body connected to each other. One of the first plate body and the second plate body is a foamed phenolic material, and the other is a fiber reinforced material.

[0009] The battery device in the technical solution of the present application provides a heat insulation board between the battery cell and the box body, so that the heat insulation board plays a role of heat insulation and fire protection for the battery cell. Moreover, since the heat insulation board is further compounded with a first plate body and a second plate body, one of the first plate body and the second plate body is a foamed phenolic material, and the other is a fiber reinforced material, the heat insulation board can have both the heat insulation and fire protection performance of the foamed phenolic material and the high strength and high rigidity mechanical properties of the fiber reinforced material, so that the heat insulation board can stably and effectively play a role of fire protection and heat insulation in the battery device.

[0010] Optionally, in the same composite unit, the first plate body and the second plate body are stacked and arranged along a first direction, and the first direction is parallel to the thickness direction of the thermal insulation board;

[0011] Alternatively, the first plate body and the second plate body are arranged side by side along a second direction, and the second direction intersects with the thickness direction of the heat insulation board.

[0012] Thus, by stacking the first plate body and the second plate body in the first direction, the tensile capacity of the heat insulation board is improved. By arranging the first plate body and the second plate body side by side in the second direction, the compressive capacity of the heat insulation board is improved.

[0013] Optionally, the number of the composite units is at least two, and the at least two composite units are arranged along the first direction or the second direction.

[0014] In this way, the composite method of the thermal insulation board can be made more diversified so as to meet different performance requirements through different morphological structures.

[0015] Optionally, the arrangement direction of the first plate body and the second plate body in each composite unit is the same and intersects with the arrangement direction of at least two composite units.

[0016] As a result, the strength and rigidity of the heat insulation board in the first direction and the second direction can be enhanced, thereby improving the tensile capacity and compressive capacity of the heat insulation board at the same time.

[0017] Optionally, in the arrangement direction of at least two composite units, the first plates in each composite unit are arranged correspondingly, and the projected areas are equal;

[0018] And / or, the second plates in each composite unit are arranged correspondingly and have the same projected areas.

[0019] As a result, two adjacent composite units can have a contact interface of the same material in each region, which is beneficial to improve the tightness of the connection between the two and improve the stability of the overall structure of the insulation board.

[0020] Optionally, the number of the composite units is three, and in the arrangement direction of the three composite units, the density of the first plate bodies in the two composite units at the ends is the same, and is different from the density of the first plate body in the composite unit in the middle;

[0021] And / or, the density of the second plate bodies in the two composite units located at the end portions is the same, and is different from the density of the second plate body in the composite unit located in the middle.

[0022] Thus, the density of the first plate bodies in the two composite units at the end is the same, and the density of the two second plate bodies is the same, so that the strength and stiffness of the first plate bodies in the two composite units at the end are consistent, and the strength and stiffness of the second plate bodies are also consistent, which is conducive to improving the uniformity of the force on both ends of the heat insulation board in the arrangement direction of the three composite units. Furthermore, the density of the first plate body and the second plate body in the two composite units at the end is set to be different from the density of the first plate body and the second plate body in the composite unit located in the middle, so that the composite unit located at the end and the composite unit located in the middle can have different strengths and stiffnesses, so as to achieve different mechanical performance requirements in different areas of the heat insulation board.

[0023] Optionally, the number of the composite units is three, and in the arrangement direction of the three composite units, the extension sizes of the two composite units located at the ends are equal.

[0024] Thus, the uniformity of the contraction of the two first plates located on both sides of the second plate can be further improved, and at the same time, modular manufacturing of the two first plates is facilitated.

[0025] Optionally, in the arrangement direction of the three composite units, the extension dimensions of the two composite units located at the ends are defined as N1, and the sum of the extension dimensions of the three composite units is defined as N2, satisfying the relationship: 0.05≤N1 / N2≤0.3.

[0026] This facilitates uniform pressure distribution within the insulation board and improves the bending yield capacity of the insulation board.

[0027] Optionally, two adjacent composite units are bonded together.

[0028] Thus, the connection area between the composite units can be increased, which is beneficial to improving the stability of the connection between the composite units. At the same time, it is unnecessary to set a connection structure on the composite unit, which is beneficial to protecting the structural strength of the composite unit itself.

[0029] Optionally, the composite unit includes two first plate bodies, and the second plate body is located between the two first plate bodies.

[0030] As a result, both sides of the second plate body can be evenly stressed during molding, which helps to reduce the possibility of warping of the insulation board.

[0031] Optionally, in the same composite unit, in the arrangement direction of the first plate body and the second plate body, the extension dimensions of the two first plate bodies are equal.

[0032] Thus, the uniformity of the contraction of the two first plates located on both sides of the second plate can be further improved, and at the same time, modular manufacturing of the two first plates is facilitated.

[0033] Optionally, in the arrangement direction of the first plate body and the second plate body, the extension dimension of the first plate body is defined as L1, and the corresponding extension dimension of the composite unit is defined as L2, satisfying the relationship: 0.05≤L1 / L2≤0.3.

[0034] This facilitates uniform pressure distribution within the insulation board and improves the bending yield capacity of the insulation board.

[0035] Optionally, in the same composite unit, on a projection plane intersecting in the arrangement direction of the first plate body and the second plate body, the projection of the first plate body and the projection of the second plate body overlap;

[0036] And / or, the first plate body and the second plate body in the same composite unit are an integral structure;

[0037] And / or, the battery device further includes a cold plate, which is disposed on the box body and configured to cool the battery cells, and the heat insulation plate is disposed between the cold plate and the box body.

[0038] Therefore, by setting the shape and area of ​​the first plate body and the second plate body to be equal, or by setting the area and shape of the longitudinal section of the first plate body and the second plate body to be equal, it is possible to facilitate full contact between the first plate body and the second plate body, and to achieve full compounding of the heat insulation board at all locations. By setting the first plate body and the second plate body as an integral structure, the strength of the two at the connection point can be enhanced, which is conducive to further improving the overall strength of the heat insulation board and improving the mechanical properties. The provision of the cold plate can improve the cooling effect on the battery cells, and the provision of the heat insulation plate between the cold plate and the box body will not affect the cooling effect of the cold plate on the battery cells.

[0039] The present application also proposes a heat insulation board, comprising at least one composite unit, wherein the composite unit comprises a first board body and a second board body connected to each other, wherein one of the first board body and the second board body is a foamed phenolic material, and the other of the first board body and the second board body is a fiber reinforced material.

[0040] As a result, the heat insulation board can have both the heat insulation and fireproof properties of the foamed phenolic material and the high strength and high rigidity mechanical properties of the fiber reinforced material, so that the heat insulation board can stably and effectively play a role in fireproofing and heat insulation in the battery device.

[0041] Optionally, the composite unit includes two first plates, and the second plate is located between the two first plates;

[0042] And / or, the first plate body and the second plate body in the same composite unit are an integral structure;

[0043] And / or, in the same composite unit, the first plate body and the second plate body are stacked and arranged along a first direction, and the first direction is parallel to the thickness direction of the thermal insulation board; or, the first plate body and the second plate body are arranged side by side along a second direction, and the second direction intersects with the thickness direction of the thermal insulation board;

[0044] And / or, the number of the composite units is three, and the arrangement direction of the first plate body and the second plate body in each composite unit is the same and intersects with the arrangement direction of the three composite units.

[0045] Thus, by arranging the second plate body between the two first plate bodies, it is possible to achieve uniform force on both sides of the second plate body during molding, which is conducive to reducing the possibility of warping of the insulation board. By making the first plate body and the second plate body in the same composite unit into an integrated structure, the strength of the two at the connection point can be enhanced, which is conducive to further improving the overall strength of the insulation board and improving the mechanical properties. By stacking the first plate body and the second plate body in the first direction, it is conducive to improving the tensile capacity of the insulation board. By arranging the first plate body and the second plate body side by side in the second direction, it is conducive to improving the compression capacity of the insulation board. Setting the number of composite units to three can prevent the number from being too large, which is conducive to simplifying the structure of the insulation board. Further, the arrangement direction of the first plate body and the second plate body in the composite unit is set to intersect with the arrangement direction of the three composite units, so that the strength and rigidity of the insulation board in the first direction and the second direction can be enhanced, thereby simultaneously improving the tensile capacity and compression capacity of the insulation board.

[0046] The present application also provides an electrical device, comprising the above-mentioned battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0048] Figure 1 This is a schematic structural diagram of an embodiment of a battery device of the present application;

[0049] Figure 2 This is a schematic structural diagram of an embodiment of a heat insulation board of the present application;

[0050] Figure 3 This is a schematic structural diagram of another embodiment of the heat insulation board of the present application;

[0051] Figure 4 This is a structural schematic diagram of another embodiment of the heat insulation board of the present application;

[0052] Figure 5 This is a schematic structural diagram of another embodiment of the heat insulation board of the present application.

[0053] Description of Figure Numbers:

[0054]

[0055] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0058] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0060] Batteries, which are devices for storing electrical energy, are widely used not only in energy storage power systems such as hydropower, thermal, wind and solar power stations, but also in electric transportation vehicles such as electric bicycles, electric motorcycles, electric cars and other fields.

[0061] The battery device may include a box body and a battery cell disposed in the box body. The battery cell is the smallest unit of the battery, and generally includes a battery housing and an electrode assembly disposed in the battery housing. The electrode assembly is the part of the battery cell where the electrochemical reaction actually occurs, and may include a positive electrode sheet, a negative electrode sheet, and a separator located therebetween, and the positive electrode sheet, the negative electrode sheet, and the separator are formed by winding or laminating.

[0062] Furthermore, during use, the battery device in the related art may suffer from thermal runaway due to short circuit or overcharge and discharge. Therefore, in order to reduce the damage range when thermal runaway occurs, a heat insulation board may be provided between the battery cell and the box.

[0063] However, traditional heat insulation boards are usually made of foamed phenolic materials. At this time, the material structure of the heat insulation board is single, so that the heat insulation board can only meet the fireproof and heat insulation performance, and the mechanical performance is relatively low. The use environment in the battery device is relatively complex, which makes the mechanical properties of the heat insulation board have higher requirements. Therefore, the traditional heat insulation board cannot perform stable fireproof and heat insulation work in the battery device because it cannot take into account the mechanical performance requirements.

[0064] Based on the above considerations, in order to meet the requirements of thermal insulation, fireproofing and mechanical properties required when the thermal insulation board is used in a battery device, the present application proposes a new type of thermal insulation board that can be applied to a battery device. The thermal insulation board innovatively combines a first plate body and a second plate body, and one of the first plate body and the second plate body is a foamed phenolic material and the other is a fiber-reinforced material, so that the thermal insulation board can have both the thermal insulation and fireproofing properties of the foamed phenolic material and the mechanical properties of the fiber-reinforced material, thereby improving the reliability of the thermal insulation board.

[0065] In addition, it should be noted that the insulation board proposed in this application can not only be used in battery devices to insulate and fireproof battery cells as described above, but can also be used on building exterior walls or roofs for insulation and fireproofing, or used in industrial equipment for thermal insulation and heat preservation. This application does not limit the application scenarios of the insulation board.

[0066] Next, the structure of the heat insulation board proposed in this application is explained:

[0067] Please refer to Figure 1 and Figure 2In one embodiment of the present application, the insulation board 50 includes at least one composite unit 51, and the composite unit 51 includes a first plate body 511 and a second plate body 513 connected to each other, one of the first plate body 511 and the second plate body 513 is a foamed phenolic material, and the other is a fiber reinforced material.

[0068] The composite unit 51 is a unit formed by connecting at least one first plate 511 and at least one second plate 513. That is, the number of the first plate 511 in the composite unit 51 can be one, or two or more. Similarly, the number of the second plate 513 in the composite unit 51 can be one, or two or more.

[0069] The heat insulation board 50 may include one composite unit 51, or may include two or more composite units 51 in succession. In the same composite unit 51, the first plate body 511 and the second plate body 513 may be stacked in the first direction as described below. At this time, the composite unit 51 may be a double-layer structure or a multi-layer structure. Of course, the composite unit 51 may also be a single-layer structure, for example: the first plate body 511 and the second plate body 513 may be arranged side by side in the second direction as described below; or, the first plate body 511 and the second plate body 513 may be one of annular and the other located on the inner side of the annular shape. Even in some embodiments, the first plate body 511 and the second plate body 513 may be arranged at an angle.

[0070] In addition, the first plate 511 may be made of a foamed phenolic material, and the second plate 513 may be made of a fiber-reinforced material. Of course, the first plate 511 may be made of a fiber-reinforced material, and the second plate 513 may be made of a foamed phenolic material. The fiber-reinforced material may include glass fiber and carbon fiber material.

[0071] In addition, the shape of the first plate 511 can be any shape such as a square, a rectangle or a circle. Similarly, the shape of the second plate 513 can also be any shape such as a square, a rectangle or a circle. Moreover, the shape of the first plate 511 and the shape of the second plate 513 can be set to be the same, or they can be set to be different. In addition, the thickness of the first plate 511 and the second plate 513 can be set to be equal, or they can be set to be different. Similarly, the area of ​​the first plate 511 and the second plate 513 can be set to be equal, or they can be set to be unequal. In addition, the first plate 511 and the second plate 513 can be an integrated structure as described below, or they can be a split structure, and then connected and assembled by bonding or other methods.

[0072] The heat insulation board 50 in the technical solution of the present application is composited with a first plate body 511 and a second plate body 513, one of which is a foamed phenolic material, and the other of which is a fiber-reinforced material, so that the heat insulation board 50 can have both the heat insulation and fireproof properties of the foamed phenolic material and the high strength and high rigidity mechanical properties of the fiber-reinforced material, so that the heat insulation board 50 can stably and effectively play a role in fireproofing and heat insulation in the battery device 100. Moreover, the fiber-reinforced material also has good electrical insulation, and thus can also be used to improve the insulation effect of the heat insulation board 50. In addition, the heat insulation board 50 in this solution is also composited with a fiber-reinforced material on the surface of the foamed phenolic material. Compared with adding a fiber-reinforced material inside the foamed phenolic material, it can reduce stress concentration so that it can be transmitted more evenly, which is beneficial to improve the overall mechanical properties of the heat insulation board 50.

[0073] Please refer to Figure 2 In one embodiment of the present application, within the same composite unit 51 , the first plate body 511 and the second plate body 513 are stacked and arranged along a first direction, and the first direction is parallel to the thickness direction of the heat insulation board 50 .

[0074] The first direction may be parallel to the thickness direction of the heat insulation board 50, so that the first plate body 511 and the second plate body 513 in the same composite unit 51 are stacked into a two-layer structure or a multi-layer structure. At this time, in the first direction, the projection surface of the first plate body 511 and the projection surface of the second plate body 513 may overlap, of course, may be staggered, or the projection of one may be completely within the projection of the other.

[0075] In this embodiment, the first plate body 511 and the second plate body 513 are stacked along the first direction, so that the strength and rigidity of the insulation board 50 in the first direction can be enhanced, thereby reducing excessive local deformation or fracture of the insulation board 50 under the action of tensile force, thereby helping to improve the tensile capacity of the insulation board 50.

[0076] Please refer to Figure 3 In one embodiment of the present application, the first plate body 511 and the second plate body 513 are arranged side by side along a second direction, and the second direction intersects with the thickness direction of the heat insulation board 50 .

[0077] The second direction may intersect with the first direction and be parallel to the length direction or the width direction of the heat insulation board 50 , so that the first board body 511 and the second board body 513 in the same composite unit 51 are arranged side by side as a single-layer structure.

[0078] In this embodiment, the first plate body 511 and the second plate body 513 are arranged side by side along the second direction, so that the strength and stiffness of the composite unit 51 in the second direction can be enhanced, reducing the buckling or instability of the insulation board 50 under the action of the compression force, thereby facilitating improving the compression capacity of the insulation board 50.

[0079] Please refer to Figure 1 or Figure 2 In one embodiment of the present application, the composite unit 51 includes two first plates 511 , and the second plate 513 is located between the two first plates 511 .

[0080] When the first plate 511 and the second plate 513 are stacked and arranged along the first direction as described above, the two first plates 511 can be located on both sides of the thickness direction of the second plate 513. When the first plate 511 and the second plate 513 are arranged side by side along the second direction as described above, the two first plates 511 can be located on both sides of the length direction or width direction of the second plate 513.

[0081] In this embodiment, the number of first plates 511 is set to two, and they are located on both sides of the second plate 513, so that when the first plate 511 and the second plate 513 are solidified, the two first plate bodies 511 located on both sides of the second plate 513 can shrink evenly, so that both sides of the second plate 513 can be evenly stressed during molding, which is beneficial to reduce the possibility of warping of the insulation board 50.

[0082] Please refer to Figure 2 or Figure 3 In one embodiment of the present application, in the same composite unit 51 , in the arrangement direction of the first plate body 511 and the second plate body 513 , the extension dimensions of the two first plate bodies 511 are equal.

[0083] When the first plate 511 and the second plate 513 are stacked along the first direction as described above, the extension dimension of the two first plates 511 can also be said to be the thickness dimension of the two first plates 511. When the first plate 511 and the second plate 513 are arranged side by side along the second direction as described above, the extension dimension of the two first plates 511 can also be said to be the length or width dimension of the two first plates 511.

[0084] In this embodiment, in the arrangement direction of the first plate 511 and the second plate 513, the extension dimensions of the two first plates 511 are set to be equal, which can further improve the uniformity of the contraction of the two first plates 511 located on both sides of the second plate 513. At the same time, it is convenient to carry out modular manufacturing of the two first plates 511.

[0085] Please refer to Figure 2In one embodiment of the present application, in the arrangement direction of the first plate body 511 and the second plate body 513, the extension dimension of the first plate body 511 is defined as L1, and the corresponding extension dimension of the composite unit 51 is defined as L2, satisfying the relationship: 0.05≤L1 / L2≤0.3.

[0086] In this embodiment, the ratio of L1 to L2 is set to 0.05 to 0.3, so that the proportion of the first plate body 511 will not be too small or too large, so as to achieve uniform pressure distribution in the heat insulation board 50 and improve the bending yield capacity of the heat insulation board 50. The ratio of L1 to L2 can be 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29 or 0.3, and of course it can be any value in the above range.

[0087] Please refer to Figure 2 or Figure 3 In one embodiment of the present application, within the same composite unit 51, on a projection plane intersecting the arrangement direction of the first plate 511 and the second plate 513, the projection of the first plate 511 and the projection of the second plate 513 overlap.

[0088] When the first plate 511 and the second plate 513 are stacked and arranged along the first direction as described above, on the projection plane intersecting the arrangement direction of the first plate 511 and the second plate 513, the projection of the first plate 511 and the projection of the second plate 513 overlap, that is, the shapes and areas of the first plate 511 and the second plate 513 are equal. When the first plate 511 and the second plate 513 are arranged side by side along the second direction as described above, on the projection plane intersecting the arrangement direction of the first plate 511 and the second plate 513, the projection of the first plate 511 and the projection of the second plate 513 overlap, that is, the areas and shapes of the longitudinal sections of the first plate 511 and the second plate 513 are equal.

[0089] In this embodiment, the shapes and areas of the first plate 511 and the second plate 513 are set to be equal, or the areas and shapes of the longitudinal sections of the first plate 511 and the second plate 513 are set to be equal, so that the first plate 511 and the second plate 513 can be fully contacted, and the insulation board 50 can be fully compounded at all locations.

[0090] In one embodiment of the present application, the first plate body 511 and the second plate body 513 in the same composite unit 51 are an integral structure.

[0091] The integral structure means that the first plate 511 and the second plate 513 are integrally formed by manufacturing. For example, when the first plate 511 and the second plate 513 are not completely solidified, they can be placed together for pressurized solidification, and then an integral structure can be formed after solidification.

[0092] In this embodiment, the first plate body 511 and the second plate body 513 are provided as an integral structure, which can enhance the strength of the connection between the two, thereby further improving the overall strength and mechanical properties of the heat insulation board 50. At the same time, the connection structure between the first plate body 511 and the second plate body 513 can also be omitted, thereby simplifying the structure of the heat insulation board 50.

[0093] Please refer to Figure 4 or Figure 5 In one embodiment of the present application, the number of the composite units 51 is at least two, and at least two composite units 51 are arranged along the first direction or the second direction.

[0094] The arrangement direction of at least two composite units 51 may be the same as the arrangement direction of the first plate 511 and the second plate 513 in the composite unit 51. For example, when the first plate 511 and the second plate 513 in the composite unit 51 are arranged along the first direction, the at least two composite units 51 may also be arranged along the first direction. When the first plate 511 and the second plate 513 in the composite unit 51 are arranged along the second direction, the at least two composite units 51 may also be arranged along the second direction. Of course, the arrangement direction of at least two composite units 51 may also be different from the arrangement direction of the first plate 511 and the second plate 513 in the composite unit 51. For example, when the first plate 511 and the second plate 513 in the composite unit 51 are arranged along the first direction, the at least two composite units 51 may be arranged along the second direction. When the first plate 511 and the second plate 513 in the composite unit 51 are arranged along the second direction, the at least two composite units 51 may also be arranged along the first direction. Furthermore, the arrangement directions of the first plate bodies 511 and the second plate bodies 513 in different composite units 51 may be set to be the same, or may be set to be different.

[0095] In this embodiment, the number of the composite units 51 is set to at least two, so that the composite method of the heat insulation board 50 can be more diversified, so as to meet different performance requirements through different morphological structures.

[0096] Please refer to Figure 4 or Figure 5 In one embodiment of the present application, the arrangement direction of the first plate body 511 and the second plate body 513 in each composite unit 51 is the same and intersects with the arrangement direction of at least two composite units 51 .

[0097] In this embodiment, the arrangement direction of the first plate body 511 and the second plate body 513 in the composite unit 51 and the arrangement direction of at least two composite units 51 are set to intersect, that is, different, so that the strength and rigidity of the insulation board 50 in the first direction and the second direction can be enhanced, thereby improving the tensile capacity and compression capacity of the insulation board 50 at the same time.

[0098] In one embodiment of the present application, in the arrangement direction of at least two composite units 51 , the first plates 511 in each composite unit 51 are arranged correspondingly and have the same projected area.

[0099] The first plates 511 in each composite unit 51 are arranged correspondingly and have the same projected area, that is, the first plates 511 in different composite units 51 have the same shape and area.

[0100] In this embodiment, the first plate bodies 511 in each composite unit 51 are arranged to correspond to each other and have equal shapes and areas, so that the two can have a contact interface of the same material, which is beneficial to improve the tightness of the connection between the two and improve the stability of the overall structure of the insulation board 50.

[0101] Please refer to Figure 4 or Figure 5 In one embodiment of the present application, the second plates 513 in each composite unit 51 are arranged correspondingly and have the same projected areas.

[0102] The second plates 513 in each composite unit 51 are arranged correspondingly and have the same projected area, that is, the second plates 513 in different composite units 51 have the same shape and area.

[0103] In this embodiment, the second plate bodies 513 in each composite unit 51 are arranged to correspond to each other and have equal shapes and areas, so that the two can have a contact interface of the same material, which is beneficial to improve the tightness of the connection between the two and improve the stability of the overall structure of the insulation board 50.

[0104] Please refer to Figure 4 or Figure 5 In one embodiment of the present application, the number of the composite units 51 is three. In the arrangement direction of the three composite units 51, the density of the first plate bodies 511 in the two composite units 51 at the ends is the same, and is different from the density of the first plate body 511 in the composite unit 51 in the middle.

[0105] In this embodiment, the number of the composite units 51 is set to three, so that the number is not too large, which is conducive to simplifying the structure of the heat insulation board 50. Furthermore, the density of the first plate body 511 in the two composite units 51 at the end is the same, so that the strength and rigidity of the first plate body 511 of the two composite units 51 at the end are consistent, which is conducive to improving the uniformity of the force at both ends of the heat insulation board 50 in the arrangement direction of the three composite units 51. Furthermore, the density of the first plate body 511 in the two composite units 51 at the end and the density of the first plate body 511 in the composite unit 51 in the middle are set to be different, so that the composite unit 51 at the end and the composite unit 51 in the middle can have different strengths and rigidities, so as to achieve different mechanical performance requirements in different areas of the heat insulation board 50. Similarly, in one embodiment of the present application, the density of the second plate body 513 in the two composite units 51 at the end is the same, and is different from the density of the second plate body 513 in the composite unit 51 in the middle. In addition, the density of the first plate body 511 in the composite unit 51 at the end is set to be equal, and the density of the second plate body 513 is also set to be equal, which can also facilitate modular manufacturing of the composite units 51 at the two ends.

[0106] Of course, it should be noted that, in some embodiments, the density of the first plate body 511 in the end composite unit 51 may be set to be different, and the density of the second plate body 513 may also be set to be different. Alternatively, the density of the first plate body 511 in each composite unit 51 may be set to be equal, and the density of the second plate body 513 may also be set to be equal.

[0107] Please refer to Figure 4 or Figure 5 In one embodiment of the present application, in the arrangement direction of the three composite units 51 , the extension sizes of the two composite units 51 located at the end are equal.

[0108] When the three composite units 51 are stacked and arranged along the first direction as described above, the extension dimensions of the two composite units 51 at the ends can also be said to be the thickness dimensions of the two end units. When the three composite units 51 are arranged side by side along the second direction as described above, the extension dimensions of the two composite units 51 at the ends can also be said to be the length or width dimensions of the two end units.

[0109] In this embodiment, in the arrangement direction of the three composite units 51, the extension sizes of the two end units are set to be equal, which can further improve the uniformity of the contraction of the two first plates 511 located on both sides of the second plate 513. At the same time, it is convenient for the two first plates 511 to be manufactured in a modular manner.

[0110] In this embodiment, the extension dimensions of the two composite units 51 at the end are set to be equal, which can improve the structural consistency of the two composite units 51, thereby facilitating the uniformity of the force on both ends of the heat insulation board 50 in the arrangement direction of the three composite units 51. At the same time, it is also convenient to modularize the two end composite units 51.

[0111] Please refer to Figure 4 In one embodiment of the present application, in the arrangement direction of the three composite units 51, the extension dimensions of the two composite units 51 located at the end are defined as N1, and the sum of the extension dimensions of the three composite units 51 is N2, satisfying the relationship: 0.05≤N1 / N2≤0.3.

[0112] In this embodiment, the ratio of N1 to N2 is set to 0.05 to 0.3, so that the proportion of the end composite unit 51 will not be too small or too large, so as to achieve uniform pressure distribution in the heat insulation board 50 and improve the bending yield capacity of the heat insulation board 50. The ratio of N1 to N2 can be 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29 or 0.3, and of course it can be any value in the above range.

[0113] In one embodiment of the present application, two adjacent composite units 51 are bonded and connected.

[0114] In this embodiment, two adjacent composite units 51 are bonded together by glue, which can increase the connection area between the composite units 51, thereby facilitating the improvement of the stability of the connection between the composite units 51. Moreover, by bonding with glue, there is no need to set a connection structure on the composite unit 51, thereby facilitating the protection of the structural strength of the composite unit 51.

[0115] Please refer to Figure 4In one embodiment of the present application, the heat insulation board 50 includes three composite units 51, and the composite unit 51 includes a first plate body 511 and a second plate body 513 connected to each other, one of the first plate body 511 and the second plate body 513 is a foamed phenolic material, and the other is a fiber reinforced material. In the same composite unit 51, the first plate body 511 and the second plate body 513 are arranged side by side along the second direction, and the second direction intersects with the thickness direction of the heat insulation board 50. The arrangement direction of the first plate body 511 and the second plate body 513 in each composite unit 51 is the same, and intersects with the arrangement direction of at least two composite units 51. In the arrangement direction of the three composite units 51, the first plate body 511 in each composite unit 51 is correspondingly arranged, and the projected area is equal; the second plate body 513 in each composite unit 51 is correspondingly arranged, and the projected area is equal. In the arrangement direction of the three composite units 51, the density of the first plate 511 in the two composite units 51 at the end is the same, and is different from the density of the first plate 511 in the composite unit 51 in the middle; the density of the second plate 513 in the two composite units 51 at the end is the same, and is different from the density of the second plate 513 in the composite unit 51 in the middle. In the arrangement direction of the three composite units 51, the extension dimensions of the two composite units 51 at the end are equal. In the arrangement direction of the three composite units 51, the extension dimensions of the two composite units 51 at the end are defined as N1, and the sum of the extension dimensions of the three composite units 51 is N2, satisfying the relationship: 0.05≤N1 / N2≤0.3. Two adjacent composite units 51 are bonded. The composite unit 51 includes two first plate bodies 511, and the second plate body 513 is located between the two first plate bodies 511. In the same composite unit 51, in the arrangement direction of the first plate 511 and the second plate 513, the extension dimensions of the two first plates 511 are equal. In the arrangement direction of the first plate 511 and the second plate 513, the extension dimension of the first plate 511 is defined as L1, and the corresponding extension dimension of the composite unit 51 is L2, satisfying the relationship: 0.05≤L1 / L2≤0.3. In the same composite unit 51, on the projection plane intersecting the arrangement direction of the first plate 511 and the second plate 513, the projection of the first plate 511 and the projection of the second plate 513 overlap; the first plate 511 and the second plate 513 in the same composite unit 51 are an integrated structure.

[0116] Please refer to Figure 1The present application also proposes a battery device 100, which includes a box body 10, a battery cell 30 and a heat insulation plate 50. The specific structure of the heat insulation plate 50 refers to the above embodiment. Since the present battery device 100 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the battery cell 30 is arranged in the box body 10, and the heat insulation plate 50 is arranged between the battery cell 30 and the box body 10. At this time, the heat insulation plate 50 is in direct contact with the battery cell 30. Of course, it can also include the situation of indirect contact with the battery cell 30, for example: in one embodiment of the present application, the battery device 100 can also include a cold plate, which is arranged in the box body 10 and is configured to cool the battery cell 30. At this time, the heat insulation plate 50 is arranged between the cold plate and the box body 10.

[0117] The present application also proposes an electrical device, which includes a battery device 100. The specific structure of the battery device 100 refers to the above embodiment. Since the electrical device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the electrical device can be but not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as: game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; spacecraft can include airplanes, rockets, space shuttles and spacecraft, etc.

[0118] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the inventive concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A battery device, characterized in that: include: Box; A battery cell, wherein the battery cell is arranged in the box; as well as A heat insulation board, wherein the heat insulation board is arranged between the battery cell and the box body, and the heat insulation board includes at least one composite unit, wherein the composite unit includes a first plate body and a second plate body connected to each other, wherein one of the first plate body and the second plate body is a foamed phenolic material, and the other of the first plate body and the second plate body is a fiber reinforced material.

2. The battery device according to claim 1, characterized in that: In the same composite unit, the first plate body and the second plate body are stacked and arranged along a first direction, and the first direction is parallel to the thickness direction of the thermal insulation board; Alternatively, the first plate body and the second plate body are arranged side by side along a second direction, and the second direction intersects with a thickness direction of the heat insulation board.

3. The battery device according to claim 2, characterized in that: The number of the composite units is at least two, and at least two of the composite units are arranged along the first direction or the second direction.

4. The battery device according to claim 3, characterized in that: The arrangement direction of the first plate body and the second plate body in each of the composite units is the same and intersects with the arrangement direction of at least two of the composite units.

5. The battery device according to claim 4, characterized in that: In the arrangement direction of at least two of the composite units, the first plates in the respective composite units are arranged correspondingly and have the same projected areas; And / or, the second plates in each of the composite units are arranged correspondingly and have the same projected areas.

6. The battery device according to claim 5, characterized in that The number of the composite units is three, and in the arrangement direction of the three composite units, the density of the first plate bodies in the two composite units at the ends is the same, and is different from the density of the first plate body in the composite unit located in the middle; And / or, the density of the second plate bodies in the two composite units located at the end portions is the same, and is different from the density of the second plate body in the composite unit located in the middle.

7. The battery device according to claim 3, characterized in that: The number of the composite units is three, and in the arrangement direction of the three composite units, the extension dimensions of the two composite units located at the end portions are equal.

8. The battery device according to claim 7, characterized in that: In the arrangement direction of the three composite units, the extension dimensions of the two composite units located at the end are defined as N1, and the sum of the extension dimensions of the three composite units is defined as N2, satisfying the relationship: 0.05≤N1 / N2≤0.

3.

9. The battery device according to claim 3, characterized in that: Two adjacent composite units are bonded and connected.

10. The battery device according to any one of claims 1 to 9, characterized in that: The composite unit includes two first plate bodies, and the second plate body is located between the two first plate bodies.

11. The battery device according to claim 10, characterized in that: In the same composite unit, in the arrangement direction of the first plate body and the second plate body, the extension dimensions of the two first plate bodies are equal.

12. The battery device according to claim 11, characterized in that In the arrangement direction of the first plate body and the second plate body, the extension dimension of the first plate body is defined as L1, and the corresponding extension dimension of the composite unit is defined as L2, satisfying the relationship: 0.05≤L1 / L2≤0.

3.

13. The battery device according to any one of claims 1 to 9, characterized in that: In the same composite unit, on a projection plane intersecting the arrangement direction of the first plate body and the second plate body, the projection of the first plate body and the projection of the second plate body overlap; And / or, the first plate body and the second plate body in the same composite unit are an integral structure; And / or, the battery device further includes a cold plate, which is disposed on the box and configured to cool the battery cells, and the heat insulation plate is disposed between the cold plate and the box.

14. A heat insulation board, characterized in that: The invention comprises at least one composite unit, wherein the composite unit comprises a first plate body and a second plate body connected to each other, wherein one of the first plate body and the second plate body is made of a foamed phenolic material, and the other of the first plate body and the second plate body is made of a fiber-reinforced material.

15. The heat insulation board according to claim 14, characterized in that The composite unit includes two first plates, and the second plate is located between the two first plates; And / or, the first plate body and the second plate body in the same composite unit are an integral structure; And / or, in the same composite unit, the first plate body and the second plate body are stacked and arranged along a first direction, and the first direction is parallel to the thickness direction of the thermal insulation board; or, the first plate body and the second plate body are arranged side by side along a second direction, and the second direction intersects with the thickness direction of the thermal insulation board; And / or, the number of the composite units is three, and the arrangement direction of the first plate body and the second plate body in each composite unit is the same and intersects with the arrangement direction of the three composite units.

16. An electrical equipment, characterized in that: Comprising a battery device as claimed in any one of claims 1 to 13.

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