Battery assembly and energy storage device

Abstract

The utility model relates to a battery assembly and an energy storage device. The battery assembly comprises a battery and a sunshade piece. The battery comprises a battery shell, the sunshade piece is arranged on the battery shell, the orthographic projection of the battery in a target plane is located in the range of the outer contour of the orthographic projection of the sunshade piece in the target plane, and the target plane is perpendicular to the direction, pointing to the bottom of the battery, of the top of the battery. The battery can be shaded by utilizing the sun-shading piece, direct irradiation of sunlight to the battery is reduced, the temperature rise speed of the battery assembly when the battery assembly is applied to high-temperature environments such as outdoors or roofs can be further reduced, and the heat dissipation mechanism can be better utilized to dissipate heat of the battery assembly; the potential safety hazards of the battery assembly and the energy storage device comprising the battery assembly can be reduced, and the safety of the battery assembly and the energy storage device can be improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery assembly and an energy storage device. Background Art

[0002] In the related art, energy storage devices usually use heat dissipation mechanisms and internal and external temperature differences to dissipate heat to improve the safety of energy storage devices. However, with the widespread application of energy storage devices, new requirements have been put forward for the safety of energy storage devices. For example, for energy storage devices used in high-temperature environments such as outdoors or on rooftops, how to improve the safety of the energy storage devices has become an urgent problem to be solved. Summary of the invention

[0003] Based on this, it is necessary to provide a battery assembly and an energy storage device to address the problem of how to improve the safety of the energy storage device in the related art.

[0004] According to a first aspect of the present application, a battery assembly is provided, comprising a battery and a sunshade. The battery comprises a battery housing, and the sunshade is arranged on the battery housing, wherein the orthographic projection of the battery in a target plane is located within the range of the outer contour of the orthographic projection of the sunshade in the target plane, and the target plane is perpendicular to the direction from the top of the battery to the bottom of the battery.

[0005] In the technical solution of the present application, since the orthographic projection of the battery in the target plane is located within the range of the outer contour of the orthographic projection of the sunshade in the target plane, the sunshade can be used to shade the battery, reducing the direct exposure of the battery to sunlight, thereby reducing the rate of temperature rise when the battery assembly is used in high temperature environments such as outdoors or on roofs, which is conducive to better utilizing the heat dissipation mechanism to dissipate heat from the battery assembly, which can reduce the safety hazards of the battery assembly and the energy storage device including the battery assembly, and is also conducive to improving the safety of the battery assembly and the energy storage device; in addition, since the sunshade is directly provided on the battery casing, the sunshade can be designed to be more compact while meeting the battery shading requirements, which is conducive to reducing the overall occupied volume of the battery assembly.

[0006] In one embodiment, the battery further includes a battery module disposed in the battery housing, and a preset spacing is provided between the battery module and the sunshade in a direction parallel to the top of the battery and pointing to the bottom of the battery. It is understandable that a certain heat insulation distance is reserved between the sunshade and the battery module, so that when the battery assembly is used in a high temperature environment such as outdoors or on a roof, the heat radiated by sunlight on the sunshade will be transferred to the battery module more slowly, which can better reduce the speed of temperature rise when the battery assembly is used in a high temperature environment such as outdoors or on a roof, thereby facilitating the improvement of the safety of the battery assembly and the energy storage device.

[0007] In one embodiment, the preset spacing is D, where 8cm≤D≤25cm. Setting the preset spacing within a suitable range, such as setting D to 8cm≤D≤25cm, can not only reserve a sufficient heat insulation distance between the sunshade and the battery module, but also reduce the size of the battery assembly in a direction parallel to the top of the battery and pointing to the bottom of the battery, thereby reducing the volume of the battery assembly.

[0008] In one embodiment, 10 cm ≤ D ≤ 20 cm.

[0009] In one embodiment, a heat insulating member is provided between the battery housing and the battery module. The heat insulating member can be used to reduce the speed at which heat from the external environment is transferred to the battery module, thereby facilitating the speed at which the temperature of the battery assembly rises when used in a high temperature environment such as outdoors or on a roof, thereby facilitating improving the safety of the battery assembly and the energy storage device.

[0010] In one embodiment, the battery housing includes at least four inner side walls arranged toward the battery module in different directions, and at least one heat insulating member is arranged between each inner side wall and the battery module. The heat insulating member between each inner side wall and the battery module can be used to better reduce the speed of heat radiated from the external environment to be transferred to the battery module, which can greatly reduce the heat conduction rate between the external environment and the battery module, thereby helping to reduce the speed of temperature rise when the battery assembly is used in a high temperature environment such as outdoors or on a roof, thereby helping to improve the safety of the battery assembly and the energy storage device.

[0011] In one embodiment, the battery module includes a high temperature resistant battery cell. Since the battery module includes a high temperature resistant battery cell, the battery module can still work normally at a higher temperature, which is conducive to the application of the battery assembly in a high temperature environment such as outdoors or on a roof, and can also reduce the safety hazards of the battery assembly and the energy storage device, and improve the safety of the battery assembly and the energy storage device.

[0012] In one embodiment, the maximum safe operating temperature of the high temperature resistant battery cell is T max , T max The battery module 120 can still work normally at a higher temperature (such as within 35°C-45°C), which is conducive to the application of battery components in high temperature environments such as outdoors or on roofs, and can also reduce the safety hazards of battery components and energy storage devices, and improve the safety of battery components and energy storage devices.

[0013] In one of the embodiments, the battery assembly further includes a load-bearing member, which is disposed on the top of the battery housing, and the sunshade member is disposed on the load-bearing member.

[0014] In one embodiment, the sunshade is detachably connected to the load-bearing member. The sunshade can be arranged on the top side of the battery housing through the load-bearing member, and the load-bearing member can be used to improve the bearing capacity of the battery housing, so that the sunshade can be more stably arranged on the battery housing. The sunshade can also be used to shade the battery, thereby reducing the temperature rise rate of the battery assembly when it is used in a high-temperature environment such as outdoors or on a roof, thereby improving the safety of the battery assembly and the energy storage device.

[0015] In one embodiment, the sunshade is provided with a first clamping portion, the load-bearing member includes a second clamping portion corresponding to the first clamping portion, and the sunshade and the load-bearing member are clamped together by means of the first clamping portion and the second clamping portion. In this way, the sunshade and the load-bearing member can be clamped together by using the first clamping portion and the second clamping portion, so as to facilitate the installation, removal and replacement of the sunshade.

[0016] In one embodiment, the battery housing includes a first housing and a reinforcement member disposed on at least one side of the first housing along a first direction, the load-bearing member is connected to the top of the reinforcement member, and the first direction and the direction from the top of the battery to the bottom of the battery intersect each other. In this way, the reinforcement member can be used to improve the strength of the battery housing, thereby improving the bearing capacity of the battery housing, which is conducive to improving the stability of the sunshade member disposed on the battery housing.

[0017] In one embodiment, a heat reflective coating layer is provided on the outer surface of the battery housing. The heat reflective coating layer can be used to effectively reflect heat, reduce the speed at which heat from the external environment is transferred to the battery module in the battery housing, and thus reduce the speed at which the temperature rise of the battery assembly when used in a high temperature environment such as outdoors or on a roof, thereby reducing the potential safety hazards of the battery assembly and the energy storage device including the battery assembly, and is also conducive to improving the safety of the battery assembly and the energy storage device.

[0018] According to a second aspect of the present application, there is provided an energy storage device comprising a battery assembly according to any one of the above embodiments.

[0019] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0021] Figure 1A schematic structural diagram of an energy storage device in an embodiment of the present application is shown.

[0022] Figure 2 A schematic structural diagram of a battery in an embodiment of the present application is shown.

[0023] Figure 3 A side view of an energy storage device in an embodiment of the present application is shown.

[0024] Figure 4 An exploded schematic diagram of an energy storage device in an embodiment of the present application is shown.

[0025] Figure 5 A schematic diagram of the internal structure of a battery in an embodiment of the present application is shown.

[0026] Reference numerals:

[0027] 10. Energy storage device;

[0028] 100, battery; 110, battery housing; 111, first housing; 112, reinforcement; 113, second housing; 1111, inner wall; 120, battery module; 130, heat insulating member; 140, sealing ring;

[0029] 200, sunshade; 201, first clamping portion; 210, top wall; 220, bottom wall; 230, connecting wall;

[0030] 300, load-bearing member; 301, second clamping portion;

[0031] 400, support member; 401, first connecting portion;

[0032] 500. Connectors. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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 the specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0039] As described in the background technology, the energy storage device in the related art usually uses a heat dissipation mechanism and the temperature difference between the inside and outside to dissipate heat. If the energy storage device is used in a high-temperature environment such as outdoors or on a roof, for example, the ambient temperature outdoors or on the roof is high during the hot summer period, the heat dissipation mechanism cannot solve the high temperature problem of the energy storage device in the related art, which in turn leads to a high safety hazard of the energy storage device in the related art.

[0040] In order to solve the problem of high safety hazards of energy storage devices in related technologies, the present application designs a battery assembly and an energy storage device, which can reduce the rate of temperature rise when the battery assembly is used in high-temperature environments such as outdoors or on roofs, thereby facilitating better utilization of the heat dissipation mechanism to dissipate heat from the battery assembly, thereby reducing the safety hazards of the battery assembly and the energy storage device including the battery assembly, and also facilitating improving the safety of the battery assembly and the energy storage device.

[0041] Figure 1 1 shows a schematic diagram of the structure of an energy storage device 10 in an embodiment of the present application. Figure 2 A schematic structural diagram of a battery 100 in an embodiment of the present application is shown.

[0042] See also Figure 1 and Figure 2 A battery assembly provided in one embodiment of the present application includes a battery 100 and a sunshade 200 .

[0043] The battery 100 includes a battery housing 110, and the sunshade 200 is arranged on the battery housing 110, wherein the orthographic projection of the battery 100 in the target plane is located within the range of the outer contour of the orthographic projection of the sunshade 200 in the target plane, and the target plane is perpendicular to the top of the battery 100 and points to the bottom of the battery 100.

[0044] “The orthographic projection of the battery 100 in the target plane is located within the range of the outer contour of the orthographic projection of the sun visor 200 in the target plane” can be understood as that the orthographic projection of the sun visor 200 in the target plane covers the orthographic projection of the battery 100 in the target plane, and the outer contour of the orthographic projection of the sun visor 200 in the target plane is located outside the outer contour of the orthographic projection of the battery 100 in the target plane.

[0045] Specifically, the direction from the top of the battery 100 to the bottom of the battery 100 is parallel to the height direction of the battery, that is, the target plane is perpendicular to the height direction of the battery 100 .

[0046] Specifically, the sunshade 200 is a sunshade. For example, along the direction from the top of the battery 100 to the bottom of the battery 100 , the cross-sectional shape of the sunshade 200 is substantially an inverted V shape.

[0047] Since the orthographic projection of the battery 100 in the target plane is within the range of the outer contour of the orthographic projection of the sunshade 200 in the target plane, the sunshade 200 can be used to shade the battery 100, reducing the direct exposure of the battery 100 to sunlight, thereby reducing the rate of temperature rise when the battery assembly is used in high-temperature environments such as outdoors or on roofs, which is conducive to better utilizing the heat dissipation mechanism to dissipate heat from the battery assembly, reducing the safety hazards of the battery assembly and the energy storage device 10 including the battery assembly, and is also conducive to improving the safety of the battery assembly and the energy storage device 10; in addition, since the sunshade 200 is directly arranged on the battery housing 110, the sunshade 200 can be designed to be more compact while meeting the shading requirements of the battery 100, which is conducive to reducing the overall occupied volume of the battery assembly.

[0048] In some embodiments, see Figure 2 and Figure 3 The battery 100 further includes a battery module 120 disposed in the battery housing 110, and a preset distance is provided between the battery module 120 and the sunshade 200 along a direction parallel to the top of the battery 100 and pointing to the bottom of the battery 100. The preset distance is D.

[0049] Since there is a preset spacing between the battery module 120 and the sunshade 200 in a direction parallel to the top of the battery 100 pointing to the bottom of the battery 100, a certain heat insulation distance is reserved between the sunshade 200 and the battery module 120. In this way, when the battery assembly is used in a high-temperature environment such as outdoors or on a roof, the heat radiated by sunlight on the sunshade 200 will be transferred to the battery module 120 more slowly, which can better reduce the rate of temperature rise when the battery assembly is used in a high-temperature environment such as outdoors or on a roof, thereby helping to improve the safety of the battery assembly and the energy storage device 10.

[0050] In some embodiments, the preset distance is D, where 8cm≤D≤25cm.

[0051] For example, D may be 8 cm, 10 cm, 15 cm, 20 cm or 25 cm.

[0052] If the preset spacing is too small, the speed of transferring the heat radiated on the sunshade 200 to the battery module 120 will increase; if the preset spacing is too large, the size occupied by the battery assembly in the direction parallel to the top of the battery 100 pointing to the bottom of the battery 100 will be too large; for this reason, it is necessary to set the preset spacing within an appropriate range, such as setting D to 8cm≤D≤25cm, which can not only reserve a sufficient insulation distance between the sunshade 200 and the battery module 120, but also reduce the size occupied by the battery assembly in the direction parallel to the top of the battery 100 pointing to the bottom of the battery 100, thereby reducing the volume of the battery assembly.

[0053] In some embodiments, 10 cm ≤ D ≤ 20 cm.

[0054] For example, D may be 10 cm, 12 cm, 14 cm, 16 cm, 18 cm or 20 cm.

[0055] Setting the preset spacing within a suitable range, for example, setting D to 8cm≤D≤25cm, can not only reserve a sufficient thermal insulation distance between the sunshade 200 and the battery module 120, but also better reduce the size occupied by the battery assembly in a direction parallel to the top of the battery 100 pointing to the bottom of the battery 100, thereby reducing the volume of the battery assembly.

[0056] In some embodiments, see Figure 3 and Figure 4 The sunshade 200 includes a top wall 210 and a bottom wall 220 spaced apart in a direction parallel to the top of the battery 100 pointing to the bottom of the battery 100, and two connecting walls 230 connected between the top wall 210 and the bottom wall 220 and spaced apart from each other. In the direction from the top wall 210 to the bottom wall 220, the distance between the ends of the two connecting walls 230 connected to the top wall 210 is smaller than the distance between the ends of the two connecting walls 230 connected to the bottom wall 220.

[0057] It can be understood that the sunshade 200 is generally in an inverted V-shaped structure.

[0058] In this way, along the direction parallel to the top of the battery 100 pointing to the bottom of the battery 100, the distance between the top wall 210 and the battery module 120 is larger than that of the bottom wall 220, and the transfer speed of heat radiated on the top wall 210 of the sunshade 200 to the battery module 120 is lower than the transfer speed of heat radiated on the bottom wall 220 of the sunshade 200 to the battery module 120, which is more conducive to reducing the temperature rise rate of the battery assembly when it is used in high temperature environments such as outdoors or on roofs, and thus is beneficial to improving the safety of the battery assembly and the energy storage device 10.

[0059] In some embodiments, see Figure 3 and Figure 5A heat insulating member 130 is provided between the battery housing 110 and the battery module 120 .

[0060] The heat insulating member 130 is in a plate shape, and the material of the heat insulating member 130 includes heat insulating materials, such as glass fiber, asbestos, rock wool, silicate, etc.

[0061] The heat insulation 130 can be used to reduce the speed at which heat from the external environment is transferred to the battery module 120, which is beneficial to the speed of temperature rise when the battery assembly is used in a high temperature environment such as outdoors or on a roof, thereby helping to improve the safety of the battery assembly and the energy storage device 10.

[0062] In some embodiments, the battery housing 110 includes at least four inner side walls 1111 disposed along different directions toward the battery module 120 , and at least one heat insulating member 130 is disposed between each inner side wall 1111 and the battery module 120 .

[0063] The battery housing 110 may be a tetrahedron, and the battery housing 110 includes four inner side walls 1111. Alternatively, the battery housing 110 may be a pentahedron, and the battery housing 110 includes five inner side walls 1111. Similarly, the battery housing 110 may also be a hexahedron, and the battery housing 110 includes six inner side walls 1111.

[0064] By way of example, the battery housing 110 is substantially rectangular, that is, the battery housing 110 includes six inner side walls 1111 .

[0065] The heat insulating member 130 may be an integral plate-shaped structure, and the heat insulating member 130 may also include a plurality of plates disposed between the corresponding inner side wall 1111 and the battery module 120 and spaced apart from each other.

[0066] At least one heat insulating member 130 is provided between each inner wall 1111 and the battery module 120. Thus, the heat insulating member 130 between each inner wall 1111 and the battery module 120 can be utilized to better reduce the speed at which heat radiated from the external environment is transferred to the battery module 120, which can greatly reduce the thermal conductivity rate between the external environment and the battery module 120, thereby helping to reduce the speed at which the temperature rises when the battery assembly is used in high temperature environments such as outdoors or on rooftops, thereby helping to improve the safety of the battery assembly and the energy storage device 10.

[0067] In some embodiments, the battery module 120 includes high temperature resistant battery cells.

[0068] The high temperature resistant battery cell may be a lithium iron phosphate battery, a sodium ion battery or other types of high temperature resistant battery cells, among which lithium iron phosphate batteries and sodium ion batteries may be designed according to specific safe operating temperature requirements.

[0069] Since the battery module 120 includes high temperature resistant battery cells, the battery module 120 can still work normally at higher temperatures, which is beneficial for the application of battery components in high temperature environments such as outdoors or on rooftops. It can also reduce the safety hazards of battery components and energy storage devices 10 and improve the safety of battery components and energy storage devices 10.

[0070] In some embodiments, the maximum safe operating temperature of the high temperature resistant battery cell is T max , T max It is 35℃-45℃.

[0071] The safe operating temperature of a high temperature resistant battery cell refers to the temperature at which the high temperature resistant battery cell can safely operate, and the maximum safe operating temperature of a high temperature resistant battery cell refers to the maximum value selected from multiple safe operating temperatures of the high temperature resistant battery cell.

[0072] That is to say, the battery module 120 can still work normally at a higher temperature (such as within 35°C-45°C), which is conducive to the application of battery components in high temperature environments such as outdoors or on roofs, and can also reduce the safety hazards of battery components and energy storage devices 10 and improve the safety of battery components and energy storage devices 10.

[0073] In some embodiments, the battery assembly further includes a load-bearing member 300 , which is disposed on the top of the battery housing 110 , and the sunshade 200 is disposed on the load-bearing member 300 .

[0074] Alternatively, the battery assembly includes one load-bearing member 300 ; alternatively, the battery assembly includes two or more load-bearing members 300 spaced apart at the top of the battery housing 110 . For example, the battery assembly includes two load-bearing members 300 spaced apart at the top of the battery housing 110 .

[0075] The sunshade 200 can be arranged on the top side of the battery casing 110 through the load-bearing member 300. The load-bearing member 300 can be used to improve the bearing capacity of the battery casing 110, so that the sunshade 200 can be more stably arranged on the battery casing 110. The sunshade 200 can also be used to shade the battery 100, thereby reducing the temperature rise rate of the battery assembly when it is used in a high temperature environment such as outdoors or on a roof, thereby improving the safety of the battery assembly and the energy storage device 10.

[0076] In some embodiments, the load bearing member 300 is detachably connected to the top of the battery housing 110 .

[0077] The load-bearing member 300 may be connected to the top of the battery housing 110 by means of bolts or clamping.

[0078] In this way, it is convenient to disassemble or replace the load-bearing component 300 .

[0079] In some embodiments, Figure 4As shown, the sunshade 200 is provided with a first clamping portion 201 , and the load-bearing member 300 includes a second clamping portion 301 corresponding to the first clamping portion 201 , and the sunshade 200 and the load-bearing member 300 are clamped together by means of the first clamping portion 201 and the second clamping portion 301 .

[0080] One of the first clamping portion 201 and the second clamping portion 301 is a clamping slot, and the other of the first clamping portion 201 and the second clamping portion 301 is adapted to the clamping slot. Figure 4 As shown, the first clamping portion 201 is a clamping slot, and the second clamping portion 301 is an outer wall matched with the clamping slot.

[0081] In this way, the first clamping portion 201 and the second clamping portion 301 can be used to clamp the sunshade 200 and the load-bearing member 300 to each other, so as to facilitate the installation, disassembly and replacement of the sunshade 200 .

[0082] In some embodiments, Figure 4 As shown, the battery housing 110 includes a first shell 111 and a reinforcement 112 arranged on at least one side of the first shell 111 along a first direction F1, the load-bearing member 300 is connected to the top of the reinforcement 112, and the first direction F1 and the direction from the top of the battery 100 to the bottom of the battery 100 intersect with each other.

[0083] Specifically, the load-bearing member 300 is detachably connected to the top of the reinforcement member 112. For example, a first threaded hole is provided on the load-bearing member 300, and a second threaded hole corresponding to the first connection hole is provided on the reinforcement member 112. The load-bearing member 300 is connected to the top of the reinforcement member 112 by bolts (the bolts are respectively adapted to the first threaded hole and the second threaded hole).

[0084] The first housing 111 may be provided with a reinforcing member 112 on one side along the first direction F1, or may be provided with reinforcing members 112 on two opposite sides along the first direction F1. In this embodiment, the first housing 111 is provided with reinforcing members 112 on two opposite sides along the first direction F1, and the load-bearing member 300 is connected to the two reinforcing members 112 by bolts.

[0085] The first direction F1 may be perpendicular to a direction from the top of the battery 100 to the bottom of the battery 100 , and the first direction F1 may be parallel to a length direction or a width direction of the battery 100 . For example, the first direction F1 is parallel to the width direction of the battery 100 .

[0086] In this way, the reinforcement member 112 can be used to improve the strength of the battery housing 110 , thereby improving the bearing capacity of the battery housing 110 , which is beneficial to improving the stability of the sunshade member 200 disposed on the battery housing 110 .

[0087] In this embodiment, the battery housing 110 further includes a second housing 113, and the first housing 111 and the second housing 113 enclose a storage space for accommodating the heat insulating member 130 and the battery module 120. The first housing 111 includes five inner side walls 1111, and the five inner side walls 1111 include a top inner wall and four side inner walls respectively connected to the top inner wall and arranged around the battery module 120, and the second housing 113 includes an inner side wall 1111, and the inner side wall 1111 is a bottom inner wall.

[0088] Optionally, the first shell 111 and the second shell 113 are connected by a plurality of bolts to facilitate assembly of the battery 100 .

[0089] Optionally, the battery housing 110 further includes a sealing ring 140 , which is disposed between the periphery of the first shell 111 and the periphery of the second shell 113 to improve the sealing of the accommodating space.

[0090] In some embodiments, the outer surface of the battery housing 110 is provided with a heat reflective paint layer.

[0091] The material of the heat-reflective coating layer includes at least one of solar shielding coating, solar heat-reflective coating, space heat-insulating coating, energy-saving heat-insulating coating and infrared camouflage cooling coating.

[0092] The outer surface of the battery shell 110 is provided with a heat-reflective paint layer, which may be that all outer surfaces of the battery shell 110 are provided with a heat-reflective paint layer, or that part of the outer surface of the battery shell 110 is provided with a heat-reflective paint layer, for example, the outer surface of the first shell 111 of the battery shell 110 is provided with a heat-reflective paint layer. For example, all outer surfaces of the battery shell 110 are provided with a heat-reflective paint layer, for example, the outer surfaces of the first shell 111, the reinforcement 112, and the second shell 113 of the battery shell 110 are provided with a heat-reflective paint layer.

[0093] In this way, the heat-reflective coating layer can be used to effectively reflect heat, thereby reducing the speed at which heat from the external environment is transferred to the battery module 120 in the battery housing 110, thereby reducing the speed at which the temperature rise of the battery assembly is used in high-temperature environments such as outdoors or on rooftops, thereby reducing the safety hazards of the battery assembly and the energy storage device 10 including the battery assembly, and is also beneficial to improving the safety of the battery assembly and the energy storage device 10.

[0094] In some embodiments, a battery assembly provided by an embodiment of the present application includes a battery 100 and a sunshade 200. The battery 100 includes a battery housing 110 and a battery module 120 disposed in the battery housing 110, a heat insulating member 130 is disposed between the battery housing 110 and the battery module 120, and a heat reflective coating layer is disposed on the outer surface of the battery housing 110. The orthographic projection of the battery 100 in the target plane is located within the outer contour of the orthographic projection of the sunshade 200 in the target plane.

[0095] The sunshade 200 can be used to shade the battery 100 to reduce direct exposure of the battery 100 to sunlight. The heat insulation 130 and the heat-reflective coating layer can also be used to reduce the speed at which heat from the external environment is transferred to the battery module 120, thereby reducing the speed at which the temperature rise of the battery assembly is used in high-temperature environments such as outdoors or on rooftops. This can reduce the safety hazards of the battery assembly and the energy storage device 10, and is also beneficial to improving the safety of the battery assembly and the energy storage device 10.

[0096] An embodiment of the present application provides an energy storage device 10, comprising a battery assembly according to any of the above embodiments.

[0097] In some embodiments, the battery assembly also includes a support member 400 for supporting the battery, and the energy storage device 10 includes at least two battery assemblies arranged in a direction parallel to the top of the battery 100 and pointing to the bottom of the battery 100, and among two adjacent battery assemblies, the load-bearing member 300 of one battery assembly and the support member 400 of the other battery assembly are detachably connected.

[0098] like Figure 4 As shown, the support member 400 is provided with a first connection portion 401 , the load-bearing member 300 is provided with a second connection portion corresponding to the first connection portion 401 , and the energy storage device 10 further includes a connection member 500 respectively adapted to the first connection portion 401 and the second connection portion.

[0099] For example, the first connection portion 401 and the second connection portion are both threaded holes, and the connection member 500 is a bolt that matches the bolt hole.

[0100] Among two adjacent battery assemblies, the load-bearing member 300 of one battery assembly and the supporting member 400 of the other battery assembly are detachably connected, so that at least two battery assemblies are stacked in a direction parallel to the top of the battery 100 and pointing to the bottom of the battery 100, which is beneficial to reducing the footprint of the at least two battery assemblies and facilitating the storage of the at least two battery assemblies.

[0101] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0102] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery assembly, characterized in that: include: A battery (100) comprising a battery housing (110); and A sunshade (200) is provided on the battery housing (110); The orthographic projection of the battery (100) in the target plane is located within the range of the outer contour of the orthographic projection of the sunshade (200) in the target plane; The target plane is perpendicular to a direction from the top of the battery (100) to the bottom of the battery (100).

2. The battery assembly according to claim 1, characterized in that: The battery (100) further comprises a battery module (120) disposed in the battery housing (110); Along a direction parallel to the top of the battery (100) and pointing toward the bottom of the battery (100), there is a preset distance between the battery module (120) and the sunshade (200).

3. The battery assembly according to claim 2, characterized in that: The preset distance is D, wherein 8cm≤D≤25cm.

4. The battery assembly according to claim 3, characterized in that: 10cm≤D≤20cm.

5. The battery assembly according to claim 2, characterized in that: A heat insulating member (130) is provided between the battery housing (110) and the battery module (120).

6. The battery assembly according to claim 5, characterized in that: The battery housing (110) comprises at least four inner side walls (1111) arranged in different directions towards the battery module (120), and at least one thermal insulation component (130) is provided between each inner side wall (1111) and the battery module (120).

7. The battery assembly according to claim 2, characterized in that: The battery module (120) comprises a high temperature resistant battery cell.

8. The battery assembly according to claim 7, characterized in that: The maximum safe operating temperature of the high temperature resistant battery is T max ; The T max It is 35℃-45℃.

9. The battery assembly according to any one of claims 1 to 8, characterized in that: The battery assembly further comprises a load-bearing member (300), wherein the load-bearing member (300) is arranged on the top of the battery housing (110); The sunshade component (200) is arranged on the load-bearing component (300).

10. The battery assembly according to claim 9, characterized in that: The sunshade (200) is detachably connected to the load-bearing component (300).

11. The battery assembly according to claim 10, characterized in that: The sunshade (200) is provided with a first clamping portion (201), and the load-bearing member (300) comprises a second clamping portion (301) corresponding to the first clamping portion (201); The sunshade (200) and the load-bearing member (300) are clamped together by means of the first clamping portion (201) and the second clamping portion (301).

12. The battery assembly according to claim 9, characterized in that: The battery housing (110) comprises a first housing (111) and a reinforcing member (112) provided on at least one side of the first housing (111) along a first direction, and the load-bearing member (300) is connected to the top of the reinforcing member (112); The first direction and a direction from the top of the battery (100) to the bottom of the battery (100) intersect each other.

13. The battery assembly according to any one of claims 1 to 8, characterized in that: The outer surface of the battery housing (110) is provided with a heat reflective paint layer.

14. An energy storage device, characterized in that: Comprising a battery assembly as described in any one of claims 1-13.

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