Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, the battery device comprises a box body, a battery monomer group, a circuit board, a fireproof plate and a phase change material layer, and the box body is provided with an accommodating cavity; the battery monomer group is arranged in the accommodating cavity; a conductive part is arranged on the circuit board and is electrically connected with the battery monomer group, a groove is formed in the fireproof plate, the fireproof plate is arranged on one side, deviating from the battery monomer group, of the circuit board, and the groove covers the conductive part; the phase change material layer is arranged on the fireproof plate. According to the scheme provided by the invention, when the battery monomer group is subjected to thermal runaway, the phase-change material is heated to be vaporized, and at the moment, the vaporized phase-change material can absorb a large amount of heat, so that the temperature on the battery monomer group is reduced, and the influence on other parts during thermal runaway is further reduced; and meanwhile, after the phase change material is vaporized, the air pressure in the box body can be increased, so that the opening of the anti-explosion valve can be accelerated.

Description

Technical Field

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

[0002] The battery generally includes a lower box body, a battery module accommodated in the lower box body, a fireproof component arranged on the battery module, and a sealing cover arranged on the upper cover of the lower box body.

[0003] The fireproof components in the related art cannot solve the problem of thermal runaway during use. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device that can solve the problem of thermal runaway that cannot be solved during the use of fire-proof components.

[0005] To solve the above technical problems, in a first aspect, the present application proposes a battery device, comprising: a box body, wherein the box body is provided with a receiving cavity;

[0006] A battery cell group, wherein the battery cell group is arranged in the accommodation cavity;

[0007] A circuit board, wherein a conductive member is disposed on the circuit board and the conductive member is electrically connected to the battery cell group;

[0008] A fireproof board, wherein a groove is arranged on the fireproof board, the fireproof board is arranged on a side of the circuit board away from the battery monomer group, and the groove covers the conductive member;

[0009] A phase change material layer is arranged on the fireproof board.

[0010] In the technical solution of the embodiment of the present application, since the fireproof board is provided with a phase change material layer, when the battery cell group has thermal runaway, the phase change material will be heated and vaporized. At this time, the vaporization of the phase change material can absorb a large amount of heat, thereby reducing the temperature on the battery cell group, and further reducing the impact on other parts during thermal runaway; at the same time, after the phase change material is vaporized, the air pressure in the box can be increased, thereby accelerating the opening of the explosion-proof valve; and, after the phase change material is vaporized, the oxygen inside the box can be diluted, thereby achieving the purpose of rapid extinguishing of the flame. Moreover, since the fireproof board is provided with a groove, when the fireproof board is fixed to the circuit board, the groove can cover the conductive parts on the circuit board. In this way, even if the conductive parts have thermal runaway, the groove can effectively cover each row of conductive parts, avoiding the thermal runaway of one row of conductive parts causing thermal runaway of another row of conductive parts, and at the same time, it can also avoid the thermal runaway generated in each row of conductive parts from gathering together, thereby effectively improving the fire prevention effect.

[0011] In some embodiments, the fireproof board is formed by mixing epoxy resin and glass fiber cloth to form a composite board, the phase change material layer is arranged on a side of the composite board facing the circuit board, and / or,

[0012] The phase change material layer is arranged on a side of the composite board facing away from the circuit board.

[0013] In some embodiments, the phase change material layer is bonded to the fireproof board, or the phase change material layer is clamped to the fireproof board.

[0014] In some embodiments, the fireproof board is provided with air holes, the phase change material layer is provided in the fireproof board, and the air holes are configured to connect the outside with the phase change material layer.

[0015] In some embodiments, a plurality of the grooves are arranged on the fireproof plate at intervals along the stacking direction of the battery cell group, and each of the grooves covers the corresponding conductive member.

[0016] In some embodiments, the box body includes a shell and a top cover, and the shell and the top cover are connected and arranged to form the accommodating cavity;

[0017] The fireproof plate is arranged on a side of the circuit board facing the top cover.

[0018] In some embodiments, the top cover is provided with reinforcing ribs, so that the overall strength of the top cover can be improved.

[0019] In some embodiments, a protrusion is provided on a side of the top cover facing the fireproof board;

[0020] The position of the protrusion coincides with the position of the reinforcing rib, and / or the position of the protrusion and the position of the reinforcing rib are spaced apart along the stacking direction of the battery cell group. In this way, the strength of the top cover can be further improved to prevent it from deforming when heated.

[0021] In some embodiments, the thickness of the protrusion is greater than the thickness of the top cover.

[0022] In some embodiments, the protrusions and the grooves are spaced apart from each other along the stacking direction of the battery cell group.

[0023] In some embodiments, the inner surface of the top cover is provided with a heat insulation layer, and / or the outer surface of the top cover is provided with a heat insulation layer. In this way, the heat insulation effect of the top cover can be improved.

[0024] In some embodiments, the top cover is a silicone rubber plate. Since silicone rubber itself is light in weight and resistant to ablation, the top cover is also light in weight and resistant to ablation, thereby reducing the weight of the entire battery device and improving the ablation resistance of the entire battery device.

[0025] In a second aspect, the present application proposes an electrical device, comprising a battery device as described in any one of the embodiments of the present application.

[0026] 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

[0027] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the embodiments below. The accompanying drawings are only for the purpose of illustrating the 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:

[0028] Figure 1 A schematic diagram of the structure of an electric device provided in some embodiments of the present application;

[0029] Figure 2 A schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0030] Figure 3 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application;

[0031] Figure 4 A cross-sectional view of a battery device provided for some embodiments of the present application;

[0032] Figure 5 A partial schematic diagram of a battery device provided in some embodiments of the present application;

[0033] Figure 6 for Figure 5 Schematic diagram at A in the middle;

[0034] Figure 7 A front view of a battery device provided in some embodiments of the present application;

[0035] Figure 8 A top view of a battery device provided in some embodiments of the present application.

[0036] The reference numerals in the specific implementation manner are as follows:

[0037] 1000. Vehicles;

[0038] 100, battery; 200, controller; 300, motor;

[0039] 110, storage box; 111, first part; 112, second part; 120, battery cell; 121, shell body; 122, end cover; 123, electrode assembly;

[0040] 10. Box body; 11. Shell; 12. Top cover; 124. Protrusion; 13. Battery cell group; 14. Fireproof board; 141. Groove; 142. Air hole; 15. Phase change material layer. DETAILED DESCRIPTION

[0041] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0043] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0044] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0047] In the description of the embodiments of the present application, the technical 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. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0048] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it 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, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0049] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0050] In the related art, a battery generally includes a lower box body, a battery module accommodated in the lower box body, a fireproof component arranged on the battery module, and a sealing cover arranged on an upper cover of the lower box body.

[0051] The above-mentioned fireproof components are mostly mica boards. When thermal runaway occurs in the battery module, the fireproof components cannot solve the thermal runaway problem.

[0052] Based on the above considerations, in order to solve the problem of thermal runaway that fire-proof components cannot solve during use, a battery device is designed, which includes a box body, a battery cell group, a circuit board, a fire-proof board and a phase change material layer, wherein the box body is provided with a accommodating cavity, the battery cell group is arranged in the accommodating cavity, a conductive part is arranged on the circuit board, the conductive part is electrically connected to the battery cell group, a groove is arranged on the fire-proof board, the fire-proof board is arranged on the side of the circuit board away from the battery cell group, the groove covers the conductive part, and the phase change material layer is arranged on the fire-proof board.

[0053] In the technical solution of the embodiment of the present application, since the fireproof board is provided with a phase change material layer, when the battery cell group has thermal runaway, the phase change material will be heated and vaporized. At this time, the vaporization of the phase change material can absorb a large amount of heat, thereby reducing the temperature on the battery cell group, and further reducing the impact on other parts during thermal runaway; at the same time, after the phase change material is vaporized, the air pressure in the box can be increased, thereby accelerating the opening of the explosion-proof valve; and, after the phase change material is vaporized, the oxygen inside the box can be diluted, thereby achieving the purpose of rapid extinguishing of the flame. Moreover, since the fireproof board is provided with a groove, when the fireproof board is fixed to the circuit board, the groove can cover the conductive parts on the circuit board. In this way, even if the conductive parts have thermal runaway, the groove can effectively cover each row of conductive parts, avoiding the thermal runaway of one row of conductive parts causing thermal runaway of another row of conductive parts, and at the same time, it can also avoid the thermal runaway generated in each row of conductive parts from gathering together, thereby effectively improving the fire prevention effect.

[0054] The battery device in this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery pack, etc. The battery can be used as a power source or power system for an electrical device, which is conducive to improving the overall performance of the battery and facilitating the promotion of the battery.

[0055] The above-mentioned electrical devices may be, but are not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0056] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0057] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0058] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0059] Please refer to Figure 2 , Figure 2 An exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a storage box 110 and a battery cell 120, and the battery cell 120 is contained in the storage box 110. The storage box 110 is used to provide a storage space for the battery cell 120, and the storage box 110 can adopt a variety of structures. In some embodiments, the storage box 110 may include a first part 111 and a second part 112, the first part 111 and the second part 112 cover each other, and the first part 111 and the second part 112 jointly define a storage space for accommodating the battery cell 120. The second part 112 may be a hollow structure with one end open, the first part 111 may be a plate-like structure, and the first part 111 covers the open side of the second part 112, so that the first part 111 and the second part 112 jointly define a storage space; the first part 111 and the second part 112 may also be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the storage box 110 formed by the first part 111 and the second part 112 can be in various shapes, such as a cylinder, a cuboid, etc.

[0060] In the battery 100, there may be multiple battery cells 120, and the multiple battery cells 120 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 120 are both connected in series and in parallel. The multiple battery cells 120 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 120 is accommodated in the storage box 110; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 120 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the storage box 110. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 120.

[0061] Each battery cell 120 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 120 may be cylindrical, flat, rectangular, or in other shapes.

[0062] like Figure 3 As shown, the battery cell 120 may include a housing, an electrode assembly 123 and electrode terminals. The housing includes a housing body 121 and an end cap 122. The housing body 121 has an opening, and the end cap 122 closes the opening to isolate the internal environment of the battery cell 120 from the external environment.

[0063] The shell body 121 is a component used to cooperate with the end cap 122 to form the internal environment of the battery cell 120, wherein the formed internal environment can be used to accommodate the electrode assembly 123, the electrolyte and other components. The shell body 121 and the end cap 122 can be independent components. The shell body 121 can be of various shapes and sizes. Specifically, the shape of the shell body 121 can be determined according to the specific shape and size of the electrode assembly 123. The material of the shell body 121 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0064] The end cap 122 refers to a component that covers the opening of the shell body 121 to isolate the internal environment of the battery cell 120 from the external environment. Without limitation, the shape of the end cap 122 can be adapted to the shape of the shell body 121 to match the shell body 121. Optionally, the end cap 122 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 122 is not easily deformed when squeezed and collided, so that the battery cell 120 can have a higher structural strength and reliability can also be improved. Functional components such as electrode terminals can be provided on the end cap 122. The electrode terminal can be used to electrically connect to the electrode assembly 123 for outputting or inputting electrical energy of the battery cell 120. The material of the end cap 122 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this. In some embodiments, an insulating structure may be provided inside the end cap 122, and the insulating structure may be used to isolate the electrical connection components in the shell body 121 from the end cap 122 to reduce the risk of short circuit. For example, the insulating structure may be plastic, rubber, or the like.

[0065] The electrode assembly 123 is a component in the battery cell 120 where an electrochemical reaction occurs. The shell body 121 may contain one or more electrode assemblies 123. The electrode assembly 123 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet, and the separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid short circuits between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly 123, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the pole ear. The positive pole ear and the negative pole ear can be located at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery 100, the positive active material and the negative active material react with the electrolyte, and the pole ear connects the electrode terminal to form a current loop. In addition, the electrode assembly 123 can be a winding structure or a stacked structure.

[0066] In some embodiments, the battery cell 120 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 120 reaches a threshold value.

[0067] According to some embodiments of the present application, Figure 4 is a cross-sectional view of the battery device in this application, Figure 5 is a partial schematic diagram of the battery device in this application, Figure 6 for Figure 5 Schematic diagram at A in the middle; Figure 7 This is a front view of the battery device in this application. Figure 8 FIG. 1 is a top view of the battery device in this application. Figure 4-Figure 8As shown, the present application provides a battery device, which includes a box body 10, a battery cell group 13, a circuit board, a fireproof board 14 and a phase change material layer, wherein the box body 10 is provided with a accommodating cavity, the battery cell group 13 is arranged in the accommodating cavity, a conductive member is arranged on the circuit board, the conductive member is electrically connected to the battery cell group 13, a groove 141 is arranged on the fireproof board 14, the fireproof board 14 is arranged on the side of the circuit board away from the battery cell group 13, the groove 141 covers the conductive member, and the phase change material layer is arranged on the fireproof board 14.

[0068] The box body 10 in this embodiment can be square, round, etc., and the specific size can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0069] The fireproof board 14 in this embodiment can be formed by pressing epoxy resin and glass fiber cloth, or the fireproof board 14 is formed by silicone rubber. The specific method can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0070] The phase change material in the phase change material layer in this embodiment can be dry ice, ammonium chloride, sodium acetate, etc. The specific phase change material can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0071] In this embodiment, a plurality of rows of conductive parts are provided on the circuit board, and the conductive parts may be bars, busbars, etc. When the fireproof plate 14 is fixed to the circuit board, the grooves 141 on the fireproof plate 14 cover the corresponding rows of conductive parts. In this way, even if thermal runaway occurs in the conductive parts, the grooves can effectively cover each row of conductive parts, thereby preventing the thermal runaway of one row of conductive parts from causing thermal runaway in another row of conductive parts. At the same time, it can also prevent the thermal runaways generated in each row of conductive parts from gathering together, thereby effectively improving the fire prevention effect.

[0072] In the technical solution of the embodiment of the present application, since the fireproof board 14 is provided with a phase change material layer, when the battery cell group 13 has thermal runaway, the phase change material will be heated and vaporized. At this time, the vaporization of the phase change material can absorb a large amount of heat, thereby reducing the temperature on the battery cell group 13, and further reducing the impact on other parts during thermal runaway; at the same time, after the phase change material is vaporized, the air pressure in the box 10 can be increased, thereby accelerating the opening of the explosion-proof valve; and after the phase change material is vaporized, the oxygen inside the box 10 can be diluted, thereby achieving the purpose of rapid extinguishing of the flame. Moreover, since the fireproof board 14 is provided with a groove 141, when the fireproof board 14 is fixed to the circuit board, the groove 141 can cover the conductive parts on the circuit board. In this way, even if the conductive parts have thermal runaway, the groove 141 can effectively cover each row of conductive parts, avoiding the thermal runaway of one row of conductive parts causing thermal runaway of another row of conductive parts, and at the same time, it can also avoid the thermal runaway generated in each row of conductive parts from being gathered together, thereby effectively improving the fire prevention effect.

[0073] According to some embodiments of the present application, the fireproof board 14 is formed by mixing epoxy resin and glass fiber cloth to form a composite board, and the phase change material layer is arranged on the side of the composite board facing the circuit board, and / or the phase change material layer is arranged on the side of the composite board facing away from the circuit board.

[0074] The phase change material layer in this embodiment can be arranged on the side of the composite board facing the circuit board, or the phase change material layer can be arranged on the side of the composite board facing away from the circuit board, or phase change material layers can be arranged on both sides of the composite board. For the convenience of explanation, the following description will be given by taking the case where phase change material layers are arranged on both sides of the composite board as an example.

[0075] The fireproof board in this example is formed by laminating an epoxy resin layer and a glass fiber cloth layer. Since the fireproof board formed by the epoxy resin layer and the glass fiber cloth layer has higher mechanical strength, it is helpful to resist the impact caused by thermal runaway.

[0076] According to some embodiments of the present application, the phase change material layer is bonded to the fireproof board 14 , or the phase change material layer is clamped to the fireproof board 14 .

[0077] The phase change material layer in this embodiment can be bonded to the fireproof board 14 by colloid, or a slot is formed on the fireproof board 14, and the phase change material layer is correspondingly snapped into the slot, so that it is convenient to fix the phase change material layer to the fireproof board 14.

[0078] According to some embodiments of the present application, Figure 6 As shown, the fireproof board 14 is provided with air holes 142 , the phase change material layer 15 is provided in the fireproof board 14 , and the air holes 142 are configured to communicate with the outside and the phase change material layer 15 .

[0079] In this embodiment, the phase change material layer 15 is integrated inside the fireproof board 14, so that the phase change material layer 15 can be stably located on the fireproof board 14. When the phase change material layer 15 is vaporized, the gas generated by it can flow into the box through the air holes 142.

[0080] According to some embodiments of the present application, Figure 5 As shown, a plurality of grooves 141 are arranged at intervals on the fireproof plate 14 along the stacking direction of the battery cell group 13 , and each groove 141 covers a corresponding conductive member.

[0081] In this embodiment, one, two, three or more grooves 141 may be provided on the fireproof plate 14. The size of each groove 141 may also be different. The specific size may be determined according to actual conditions, and this specification embodiment does not limit this.

[0082] When in use, after the fireproof plate 14 is set on the battery cell group 13, the groove 141 is buckled on each row of conductive parts on the circuit board. In this way, each groove 141 covers each row of conductive parts, effectively separating the rows of conductive parts, and preventing thermal runaway of one row of conductive parts from causing thermal runaway of another row of conductive parts.

[0083] According to some embodiments of the present application, Figure 4 Combined with Figure 5 As shown, the box body 10 includes a shell 11 and a top cover 12 , the shell 11 and the top cover 12 are connected and arranged to form a receiving cavity, and at the same time, a fireproof plate 14 is arranged on a side of the circuit board facing the top cover 12 .

[0084] The side of the shell 11 facing the top cover 12 in this embodiment is an open structure, and the top cover 12 can be connected to the shell 11 by bolts, or the top cover 12 is connected to the shell 11 by a hinge. The specific structure can be determined according to actual conditions and is not limited in this embodiment of the present specification.

[0085] After the battery cell group 13 is placed in the housing 11 , the fireproof plate 14 is placed on top of the battery cell group 13 , and finally the top cover 12 is closed.

[0086] According to some embodiments of the present application, reinforcing ribs (not marked in the figure) are provided on the top cover 12 .

[0087] In this embodiment, a plurality of reinforcing ribs may be provided on the outer surface or the inner surface of the top cover 12. The plurality of reinforcing ribs may intersect with each other, or the plurality of reinforcing ribs may be provided in parallel. The specific number may be determined according to actual conditions, and the embodiments of this specification do not limit this.

[0088] Since the top cover 12 is provided with reinforcing ribs, the overall strength of the top cover 12 can be improved.

[0089] According to some embodiments of the present application, Figure 5 As shown, a protrusion 124 is provided on the side of the top cover 12 facing the fireproof plate 14 , wherein the position of the protrusion 124 coincides with the position of the reinforcing rib, and / or the position of the protrusion 124 and the position of the reinforcing rib are spaced apart along the stacking direction of the battery cell group 13 .

[0090] In this embodiment, the top cover 12 and the protrusion 124 can be integrally formed, or the protrusion 124 can be snap-connected to the side of the top cover 12 facing the fireproof board 14. The specific details can be determined according to actual conditions, and the embodiments of this specification do not limit this.

[0091] In this embodiment, since a protrusion 124 is provided on the side of the top cover 12 facing the fireproof plate 14, the airflow pressure generated by thermal runaway can be effectively resisted, and at the same time, the strength of the top cover 12 is improved to prevent it from deforming when heated.

[0092] According to some embodiments of the present application, Figure 5 As shown, the thickness of the protrusion 124 is greater than the thickness of the top cover 12. In this way, under the action of the protrusion 124, the overall strength of the top cover 12 is significantly improved, which is conducive to preventing it from deforming when heated.

[0093] According to some embodiments of the present application, Figure 5 As shown, the protrusions 124 and the grooves 141 are spaced apart along the stacking direction of the battery cell group 13. In this way, when the entire battery device generates airflow due to thermal runaway, the protrusions 124 and the grooves 141 can be prevented from colliding with each other, causing damage to the fireproof plate 14.

[0094] According to some embodiments of the present application, a heat insulating layer is disposed on the inner surface of the top cover 12 , and / or a heat insulating layer is disposed on the outer surface of the top cover 12 .

[0095] The heat insulation layer in this embodiment can be made of aluminum silicate material, extruded board material, etc. The specific material can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0096] In this embodiment, a heat insulation layer can be provided on the inner surface of the top cover 12, or a heat insulation layer can be provided on the outer surface of the top cover 12, or a heat insulation layer can be provided on both the inner and outer surfaces of the top cover 12. For the sake of convenience, the following description will be given by taking the example of providing heat insulation layers on both the inner and outer surfaces of the top cover 12.

[0097] Since a heat insulating layer is provided on the surface of the top cover 12 , the heat insulating effect of the top cover 12 can be improved.

[0098] According to some embodiments of the present application, the top cover 12 is a silicone rubber plate. Of course, it is understandable that the top cover 12 can also be formed of other materials, such as steel plates, alloy plates, etc., which can be determined according to actual conditions and are not limited in this embodiment of the present specification.

[0099] In this embodiment, since the silicone rubber itself is light in weight and resistant to ablation, the top cover 12 is also light in weight and resistant to ablation, thereby reducing the weight of the entire battery device and improving the ablation resistance of the entire battery device.

[0100] The present application also provides an electrical device, comprising a battery device as described in any one of the embodiments of the present application.

[0101] The specific structure of the battery device in this embodiment refers to the above embodiment. Since all the technical solutions of all the above embodiments are adopted in this electrical device, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body, wherein the box body is provided with a containing cavity; A battery cell group, wherein the battery cell group is arranged in the accommodation cavity; A circuit board, wherein a conductive member is disposed on the circuit board and the conductive member is electrically connected to the battery cell group; A fireproof board, wherein a groove is arranged on the fireproof board, the fireproof board is arranged on a side of the circuit board away from the battery monomer group, and the groove covers the conductive member; A phase change material layer is arranged on the fireproof board.

2. The battery device according to claim 1, characterized in that: The fireproof board is formed by mixing epoxy resin and glass fiber cloth to form a composite board, the phase change material layer is arranged on a side of the composite board facing the circuit board, and / or, The phase change material layer is arranged on a side of the composite board facing away from the circuit board.

3. The battery device according to claim 1 or 2, characterized in that: The phase change material layer is bonded to the fireproof board, or the phase change material layer is clamped to the fireproof board.

4. The battery device according to claim 1 or 2, characterized in that: The fireproof board is provided with air holes, the phase change material layer is provided in the fireproof board, and the air holes are configured to communicate with the outside and the phase change material layer.

5. The battery device according to claim 1, characterized in that: A plurality of the grooves are arranged on the fireproof plate at intervals along the stacking direction of the battery monomer group, and each of the grooves covers the corresponding conductive member.

6. The battery device according to claim 5, characterized in that: The box body comprises a shell and a top cover, and the shell and the top cover are connected and arranged to form the accommodating cavity; The fireproof plate is arranged on a side of the circuit board facing the top cover.

7. The battery device according to claim 6, characterized in that: The top cover is provided with reinforcing ribs.

8. The battery device according to claim 7, characterized in that: A protrusion is provided on one side of the top cover facing the fireproof board; The position of the protrusion coincides with the position of the reinforcing rib, and / or the position of the protrusion and the position of the reinforcing rib are spaced apart along the stacking direction of the battery cell group.

9. The battery device according to claim 8, characterized in that: The thickness of the protrusion is greater than the thickness of the top cover.

10. The battery device according to claim 8, characterized in that: The protrusions and the grooves are spaced apart from each other along the stacking direction of the battery cell group.

11. The battery device according to any one of claims 6 to 10, characterized in that: The inner surface of the top cover is provided with a heat insulation layer, and / or, The outer surface of the top cover is provided with a heat insulation layer.

12. The battery device according to any one of claims 6 to 10, characterized in that: The top cover is a silicone rubber plate.

13. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1 to 12.

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