Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and the battery device comprises a box body which is provided with an accommodation cavity, and a first wall in the box body is provided with a clamping groove; the single batteries are arranged in the accommodating cavities; the heating piece comprises an electric heating wire, and the electric heating wire is fixed in the clamping groove. According to the scheme provided by the invention, the electric heating wire is fixed in the clamping groove in the first wall in the box body, so that the electric heating wire does not need to be adhered to the battery monomer, and the risk of degumming between the electric heating wire and the battery monomer can be avoided when the battery monomer vibrates.

Description

Technical Field

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

[0002] The battery generally includes a lower box, a battery module accommodated in the lower box, and an upper cover of the lower box with a sealing cover. In order to make the battery module have a better operating temperature range, a heating film is generally provided on the battery module.

[0003] The heating film in the related art may have the problem of debonding due to vibration when in use. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can solve the problem of vibration debonding of the heating film when it is in use.

[0005] In order to solve the above technical problems, in a first aspect, the present application proposes a battery device, comprising:

[0006] The box body has a containing cavity, and a first wall inside the box body is provided with a card slot;

[0007] A battery cell, wherein the battery cell is disposed in the accommodation cavity;

[0008] The heating element comprises a heating wire, and the heating wire is fixed in the slot.

[0009] In the technical solution of the embodiment of the present application, since the heating wire is fixed in the slot on the first wall inside the box, there is no need to bond the heating wire to the battery cell, thereby avoiding the risk of debonding between the heating wire and the battery cell when the battery cell vibrates.

[0010] In some embodiments, the heating wire includes a first heating wire and a second heating wire, and the card slot includes a first groove and a second groove;

[0011] The first heating wire is disposed in the first groove, and the second heating wire is disposed in the second groove.

[0012] Since the heating wire itself is small in size, after the first heating wire and the second heating wire are correspondingly arranged in the first groove and the second groove, the heating wire occupies a small area of ​​the bottom surface inside the box. At this time, the contact area between the bottom surface inside the box and the battery cell can be effectively increased, thereby increasing the bonding strength between the bottom surface inside the box and the battery cell, and further reducing the risk of debonding between the bottom surface inside the box and the battery cell during vibration.

[0013] In some embodiments, the first grooves are evenly distributed in the first area of ​​the first wall inside the box; and / or,

[0014] The second grooves are evenly distributed in the second area of ​​the first wall inside the box, wherein the first area is the periphery of the first wall inside the box, and the second area is the other area except the first area. In this way, when the first heating wire is set in the first groove, the first heating wire is evenly distributed in the first area under the limitation of the first groove. Similarly, the second heating wire is also evenly distributed in the second area, so that the heating wires can be prevented from gathering together and causing uneven heating.

[0015] In some embodiments, a plurality of the battery cells are disposed in the accommodation cavity, and the plurality of the battery cells form a battery cell group;

[0016] The first heating wire is located at the periphery of the battery cell group, and the first heating wire is at least partially located outside the battery cell group; and / or,

[0017] The second heating wire is located on the bottom surface of the battery cell group. In this way, the first heating wire or the second heating wire can be turned on according to the heating needs. When the battery cell group needs to be heated quickly, the first heating wire and the second heating wire are turned on at the same time; when the battery cell group needs to be kept warm, only the first heating wire can be turned on.

[0018] In some embodiments, the first groove extends in a bent structure, and / or,

[0019] The second groove extends in a bent structure. Since the first groove extends in a bent structure, after the first heating wire is arranged in the first groove, the first heating wire is limited by the first groove and extends in a bent structure as a whole, thereby effectively increasing the length of the first heating wire. In this way, when heating, a larger amount of heat can be provided to the battery cell group. Similarly, when heating, the second heating wire can also provide a larger amount of heat to the battery cell group.

[0020] In some embodiments, the resistance of the first heating wire is equal to the resistance of the second heating wire, and / or,

[0021] The resistance of the first heating wire is greater than the resistance of the second heating wire, and / or the resistance of the first heating wire is less than the resistance of the second heating wire. In this way, heating wires with the same resistance or different resistances can be selected according to actual needs to facilitate heating of the battery cell group.

[0022] In some embodiments, the battery device further includes a first controller and a second controller, wherein the first controller is electrically connected to the first heating wire and is used to control the switch of the first heating wire; and the second controller is electrically connected to the second heating wire and is used to control the switch of the second heating wire. In this way, it is convenient to control the opening and closing of the first heating wire and the second heating wire.

[0023] In some embodiments, the first heating wire is located in the first groove, the first heating wire is flush with the side of the first wall facing the accommodating cavity, or the first heating wire is located below the side of the first wall facing the accommodating cavity. In this way, the first heating wire can be prevented from protruding from the first wall inside the box, and when the battery cell group contacts the first wall inside the box, friction between the first heating wire and the battery cell group can be avoided.

[0024] In some embodiments, the second heating wire is located in the second groove, the second heating wire is flush with the side of the first wall facing the accommodating cavity, or the second heating wire is located below the side of the first wall facing the accommodating cavity. In this way, the second heating wire can be prevented from protruding from the first wall inside the box, and when the battery cell group contacts the first wall inside the box, friction between the second heating wire and the battery cell group can be avoided.

[0025] In some embodiments, the battery device further comprises an adhesive member, and when the heating member is located in the slot, the adhesive member fills the slot, so that the heating member can be stably located in the slot.

[0026] In some embodiments, the adhesive comprises thermally conductive adhesive, and when the heating element is located in the slot, the thermally conductive adhesive fills the slot.

[0027] Since the thermal conductive adhesive is not only sticky but also can improve the heat dissipation efficiency, when the heating element is fixed in the slot by the thermal conductive adhesive, not only can the heating element be stably located in the slot, but the heat generated by the heating element can also be quickly transferred to the bottom surface of the battery cell group through the thermal conductive adhesive, thereby facilitating rapid heating of the battery cell group.

[0028] In some embodiments, the first wall is a bottom wall, and the slot is disposed on the bottom wall.

[0029] 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.

[0030] 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

[0031] 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:

[0032] Figure 1 A schematic diagram of the structure of an electric device provided in some embodiments of the present application;

[0033] Figure 2 A schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0034] Figure 3 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application;

[0035] Figure 4 A schematic diagram of the structure of a battery device provided in some embodiments of the present application;

[0036] Figure 5 A schematic diagram of a heating element provided in some embodiments of the present application being located inside a box;

[0037] Figure 6 for Figure 4 A is an enlarged schematic diagram;

[0038] Figure 7 A schematic diagram of a heating element provided in some embodiments of the present application;

[0039] Figure 8 A schematic diagram of a first heating wire provided in some embodiments of the present application;

[0040] Fig. 9 A schematic diagram of a second heating wire provided in some embodiments of the present application.

[0041] The reference numerals in the specific implementation manner are as follows:

[0042] 1000. Vehicles;

[0043] 100, battery; 200, controller; 300, motor;

[0044] 110, box body; 111, first part; 112, second part; 120, battery cell; 121, shell; 122, end cover; 123, electrode assembly;

[0045] 10. Box body; 101. First groove; 102. Second groove; 11. Heating element; 113. First heating wire; 114. Second heating wire; 12. Battery cell group; 13. Cover plate. DETAILED DESCRIPTION

[0046] The following embodiments of the technical solution of the present application are 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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).

[0052] 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.

[0053] 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.

[0054] 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.

[0055] After the development in recent years, the number of electric vehicles has undergone a qualitative change, and the market share of electric vehicles is getting higher and higher. Due to the advantages of lithium batteries such as high energy density, fast charging capability and long cycle life, they are increasingly favored by various car companies. However, in a low temperature environment, the battery cell cannot quickly enter fast charging, so the battery cell needs to be heated quickly at low temperature. With the further development of heating plate technology, especially in the context of low-carbon economic construction and energy conservation and emission reduction, the heating plate in the battery has the advantages of high heating rate, stable heating structure interface and low cost, which makes more and more car companies use it.

[0056] The battery in the related art generally includes a lower box, a battery module accommodated in the lower box, and a sealing cover disposed on the upper cover of the lower box. In order to make the battery module have a better operating temperature range, a heating film is generally bonded to the battery module. In this way, when the battery vibrates, there is a risk of debonding between the heating film and the battery module.

[0057] Based on the above considerations, in order to solve the problem of vibration debonding of the heating film during use, a battery device is designed, which includes a box body, a battery cell and a heating element, wherein the box body has a accommodating cavity, a first wall inside the box body is provided with a card slot, the battery cell is arranged in the accommodating cavity, and the heating element includes a heating wire, which is fixed in the card slot.

[0058] In the technical solution of the embodiment of the present application, since the heating wire is fixed in the slot on the first wall inside the box, there is no need to bond the heating wire to the battery cell, thereby avoiding the risk of debonding between the heating wire and the battery cell when the battery cell vibrates.

[0059] The battery 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.

[0060] 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.

[0061] 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.

[0062] Please refer to Figure 1 , Figure 1 A 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.

[0063] 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.

[0064] 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 box body 110 and a battery cell 120, and the battery cell 120 is accommodated in the box body 110. Among them, the box body 110 is used to provide a storage space for the battery cell 120, and the box body 110 can adopt a variety of structures. In some embodiments, the box body 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 box body 110 formed by the first part 111 and the second part 112 can be in various shapes, such as a cylinder, a cuboid, etc.

[0065] 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 box body 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 box body 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.

[0066] 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.

[0067] like Figure 3 As shown, the battery cell 120 may include a housing, an electrode assembly 123 and an electrode terminal. The housing includes a shell 121 and an end cap 122. The shell 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.

[0068] The shell 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 121 and the end cap 122 can be independent components. The shell 121 can be of various shapes and sizes. Specifically, the shape of the shell 121 can be determined according to the specific shape and size of the electrode assembly 123. The material of the shell 121 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0069] The end cap 122 refers to a component that covers the opening of the shell 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 121 to match the shell 121. Optionally, the end cap 122 can be made of a material with a certain hardness and strength, such as an 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 embodiment of the present application does not impose special restrictions on this. In some embodiments, an insulating structure can also be provided on the inner side of the end cap 122, and the insulating structure can be used to isolate the electrical connection components in the shell 121 from the end cap 122 to reduce the risk of short circuit. Exemplarily, the insulating structure may be plastic, rubber, or the like.

[0070] The electrode assembly 123 is a component in the battery cell 120 where an electrochemical reaction occurs. One or more electrode assemblies 123 may be included in the housing 121. 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 may 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 may be a winding structure or a laminated structure.

[0071] 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.

[0072] According to some embodiments of the present application, Figure 4 is a schematic diagram of the structure of the battery device in this application, Figure 5 This is a schematic diagram of the heating element in this application being located inside the box. Figure 4 Combined with Figure 5 As shown, the present application provides a battery device, which includes a box body 10, a battery cell and a heating element 11, wherein the box body 10 has a accommodating cavity, a first wall inside the box body 10 is provided with a card slot, the battery cell is arranged in the accommodating cavity, and the heating element 11 includes a heating wire, which is fixed in the card slot.

[0073] refer to Figure 1 As shown, the battery device further includes a cover plate 13 and battery cells. A plurality of battery cells are connected to form a battery cell group 12 . The battery cell group 12 is disposed in a box body 10 , and the cover plate 13 is detachably fixed to an opening side of the box body 10 .

[0074] The upper side of the box 10 in this embodiment is an open structure, and a receiving cavity is formed inside the box 10, which can be used to accommodate the battery cell group 12. The box 10 can be a rectangular parallelepiped, a cylinder, etc., which can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0075] The heating element 11 in this embodiment can also be a heating wire, a carbon fiber heating wire, a ceramic heating wire, etc. The specific one can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0076] The slots in this embodiment can be evenly distributed on the first wall inside the box 10, and the heating wire is evenly connected to the slots, so that the heating wire can be stably located on the first wall inside the box 10. Of course, it can be understood that the heating wire can also be fixed to the first wall inside the box 10 by a fixing sheet, which is not limited here.

[0077] In the technical solution of the embodiment of the present application, since the heating wire is fixed in the slot on the first wall inside the box body 10, there is no need to bond the heating wire to the battery cell, thereby avoiding the risk of debonding between the heating wire and the battery cell when the battery cell vibrates.

[0078] According to some embodiments of the present application, Figure 6 Combined with Figure 7 , Figure 8 , Fig. 9 As shown, the electric heating wire includes a first heating wire 113 and a second heating wire 114 , and the card slot includes a first groove 101 and a second groove 102 , wherein the first heating wire 113 is arranged in the first groove 101 , and the second heating wire 114 is arranged in the second groove 102 .

[0079] like Figure 8 As shown, the first heating wire 113 in this embodiment is in a bent structure and is evenly arranged in the first groove 101. Fig. 9 As shown, the second heating wire 114 is also in a bent structure as a whole and is evenly arranged in the second groove 102. The overall shape of the first groove 101 is the same as the overall shape of the first heating wire 113, and the overall shape of the second groove 102 is also the same as the overall shape of the second heating wire 114. Of course, it can be understood that the overall shape of the first heating wire 113 may also be different from the overall shape of the first groove 101. The specific shape can be determined according to actual conditions, and the embodiments of this specification do not limit this.

[0080] Since the heating wire itself is small in size, when the first heating wire 113 and the second heating wire 114 are correspondingly arranged in the first groove 101 and the second groove 102, the heating wire occupies a small area of ​​the inner bottom surface of the box body 10. At this time, the contact area between the inner bottom surface of the box body 10 and the battery cell can be effectively increased, thereby increasing the bonding strength between the inner bottom surface of the box body 10 and the battery cell, and further reducing the risk of debonding between the inner bottom surface of the box body 10 and the battery cell during vibration.

[0081] According to some embodiments of the present application, the first groove 101 is evenly distributed in the first area of ​​the first wall inside the box body 10; and / or the second groove 102 is evenly distributed in the second area of ​​the first wall inside the box body 10, wherein the first area is the periphery of the first wall inside the box body 10, and the second area is other areas excluding the first area.

[0082] In this embodiment, only the first groove 101 may be evenly distributed in the first area of ​​the first wall inside the box 10, or only the second groove 102 may be evenly distributed in the second area of ​​the first wall inside the box 10, or the first groove 101 may be evenly distributed in the first area of ​​the first wall inside the box 10, and at the same time, the second groove 102 may be evenly distributed in the second area of ​​the first wall inside the box 10. For the sake of convenience in the following description, the example in which the first groove 101 is evenly distributed in the first area of ​​the first wall inside the box 10 and the second groove 102 is evenly distributed in the second area of ​​the first wall inside the box 10 is used for explanation.

[0083] When in use, after the first heating wire 113 is arranged in the first groove 101, the first heating wire 113 as a whole will be evenly distributed in the first area under the limitation of the first groove 101. Similarly, the second heating wire 114 will also be evenly distributed in the second area, so as to avoid the heating wires gathering together and causing uneven heating.

[0084] According to some embodiments of the present application, a plurality of battery cells are arranged in the accommodating cavity, and the plurality of battery cells form a battery cell group 12; the first heating wire 113 is located at the periphery of the battery cell group 12, and the first heating wire 113 is at least partially located outside the battery cell group 12; and / or the second heating wire 114 is located on the bottom surface of the battery cell group 12.

[0085] In this embodiment, after the first heating wire 113 and the second heating wire 114 are fixed, after the battery cell group 12 is placed in the box body 10, the periphery of the battery cell group 12 facing the inner bottom surface of the box body 10 is opposite to the first heating wire 113, and the center of the battery cell group 12 facing the inner bottom surface of the box body 10 is opposite to the second heating wire 114.

[0086] In this way, the first heating wire 113 or the second heating wire 114 can be turned on according to the heating needs. For example, when the battery cell group 12 needs to be quickly heated, the first heating wire 113 and the second heating wire 114 are turned on at the same time; when the battery cell group 12 needs to be kept warm, only the first heating wire 113 can be turned on.

[0087] According to some embodiments of the present application, the first groove 101 extends in a bent structure, and / or the second groove 102 extends in a bent structure.

[0088] In this embodiment, only the first groove 101 may extend in a bent structure, or only the second groove 102 may extend in a bent structure, or both the first groove 101 and the second groove 102 may extend in a bent structure. For the convenience of description, the following description will take the example that both the first groove 101 and the second groove 102 extend in a bent structure.

[0089] Since the first groove 101 extends in a bent structure, after the first heating wire 113 is disposed in the first groove 101, the first heating wire 113 is limited by the first groove 101 and extends in a bent structure as a whole, thereby effectively increasing the length of the first heating wire 113. In this way, when heating, a large amount of heat can be provided to the battery cell group 12. Similarly, when heating, the second heating wire 114 can also provide a large amount of heat to the battery cell group 12.

[0090] It should be noted that the structures of the first groove and the second groove are only examples, and other structures may be used in other alternative solutions, for example, the first groove is a spiral structure, etc. The present application does not impose any special restrictions on the specific structures of the first groove and the second groove, as long as the above structures can achieve the purpose of the present application.

[0091] According to some embodiments of the present application, the resistance of the first heating wire 113 is equal to the resistance of the second heating wire 114, and / or the resistance of the first heating wire 113 is greater than the resistance of the second heating wire 114, and / or the resistance of the first heating wire 113 is less than the resistance of the second heating wire 114. In this way, heating wires with the same resistance or different resistances can be selected according to actual needs, so as to facilitate heating of the battery cell group 12.

[0092] According to some embodiments of the present application, the battery device further includes a first controller and a second controller, wherein the first controller is electrically connected to the first heating wire 113 for controlling the switch of the first heating wire 113 ; the second controller is electrically connected to the second heating wire 114 for controlling the switch of the second heating wire 114 .

[0093] The first controller and the second controller in this embodiment can both be PLC controllers, and the specific ones can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0094] When in use, the first controller controls the opening and closing of the first heating wire 113 , and the second controller controls the opening and closing of the second heating wire 114 . In this way, it is convenient to control the opening and closing of the first heating wire 113 and the second heating wire 114 .

[0095] According to some embodiments of the present application, the first heating wire 113 is located in the first groove 101, and the first heating wire 113 is flush with the side of the first wall facing the accommodating cavity, or the first heating wire 113 is located below the side of the first wall facing the accommodating cavity.

[0096] In this embodiment, when the first heating wire 113 is arranged in the first groove 101, the first heating wire 113 will not protrude from the inner bottom surface of the box body 10, so when the battery cell group 12 contacts the inner bottom surface of the box body 10, friction between the first heating wire 113 and the battery cell group 12 can be avoided.

[0097] According to some embodiments of the present application, the second heating wire 114 is located in the second groove 102, and the second heating wire 114 is flush with the side of the first wall facing the accommodating cavity, or the second heating wire 114 is located below the side of the first wall facing the accommodating cavity.

[0098] In this embodiment, when the second heating wire 114 is arranged in the second groove 102, the second heating wire 114 will not protrude from the inner bottom surface of the box body 10, so when the battery cell group 12 contacts the inner bottom surface of the box body 10, the second heating wire 114 can be prevented from rubbing against the battery cell group 12.

[0099] According to some embodiments of the present application, the battery device further includes an adhesive member, and when the heating member 11 is located in the slot, the adhesive member fills the slot.

[0100] The adhesive in this embodiment can be a thermosetting adhesive, a hot melt adhesive, a structural adhesive, etc. The specific adhesive can be determined according to actual conditions, and this specification embodiment does not limit this.

[0101] During use, when the heating element 11 is located in the slot, the adhesive fills the slot, so that the heating element 11 can be stably located in the slot.

[0102] According to some embodiments of the present application, the adhesive member includes thermally conductive adhesive, and when the heating element 11 is located in the slot, the thermally conductive adhesive fills the slot.

[0103] Since the thermally conductive adhesive is not only sticky but also can improve the heat dissipation efficiency, when the heating element 11 is fixed in the slot by the thermally conductive adhesive, not only can the heating element 11 be stably located in the slot, but the heat generated by the heating element can also be quickly transferred to the bottom surface of the battery cell group 12 through the thermally conductive adhesive, thereby facilitating rapid heating of the battery cell group 12.

[0104] According to some embodiments of the present application, the first wall is a bottom wall, wherein the card slot is arranged on the bottom wall. Of course, it is understandable that the first wall can also be a side wall of the box body 10, which can be determined according to actual conditions, and the embodiments of this specification do not limit this.

[0105] The present application also provides an electrical device, comprising a battery device as described in any one of the embodiments of the present application.

[0106] 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.

[0107] 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: The box body has a containing cavity, and a first wall inside the box body is provided with a card slot; A battery cell, wherein the battery cell is disposed in the accommodation cavity; The heating element comprises a heating wire, and the heating wire is fixed in the slot.

2. The battery device according to claim 1, characterized in that: The heating wire includes a first heating wire and a second heating wire, and the card slot includes a first groove and a second groove; The first heating wire is disposed in the first groove, and the second heating wire is disposed in the second groove.

3. The battery device according to claim 2, characterized in that: The first grooves are evenly distributed in the first area of ​​the first wall inside the box; and / or, The second grooves are evenly distributed in the second area of ​​the first wall inside the box, wherein the first area is the periphery of the first wall inside the box, and the second area is other areas except the first area.

4. The battery device according to claim 2, characterized in that: A plurality of battery cells are arranged in the accommodation cavity, and the plurality of battery cells form a battery cell group; The first heating wire is located at the periphery of the battery cell group, and the first heating wire is at least partially located outside the battery cell group; and / or, The second heating wire is located on the bottom surface of the battery cell group.

5. The battery device according to claim 2, characterized in that: The first groove extends in a bent structure, and / or, The second groove extends in a bent structure.

6. The battery device according to claim 2, characterized in that: The resistance of the first heating wire is equal to the resistance of the second heating wire, and / or, The resistance of the first heating wire is greater than the resistance of the second heating wire, and / or the resistance of the first heating wire is less than the resistance of the second heating wire.

7. The battery device according to claim 2, characterized in that: The battery device further includes a first controller and a second controller, wherein the first controller is electrically connected to the first heating wire and is used to control the switch of the first heating wire; and the second controller is electrically connected to the second heating wire and is used to control the switch of the second heating wire.

8. The battery device according to claim 2, characterized in that: The first heating wire is located in the first groove, the first heating wire is flush with a side of the first wall facing the accommodating cavity, or the first heating wire is located below a side of the first wall facing the accommodating cavity.

9. The battery device according to claim 8, characterized in that: The second heating wire is located in the second groove, the second heating wire is flush with the side of the first wall facing the accommodating cavity, or the second heating wire is located below the side of the first wall facing the accommodating cavity.

10. The battery device according to any one of claims 2 to 9, characterized in that: The battery device further comprises an adhesive component, the heating component is located in the card slot, and the adhesive component fills the card slot.

11. The battery device according to claim 10, characterized in that: The adhesive component includes heat-conducting glue, and the heat-conducting glue fills the card slot.

12. The battery device according to any one of claims 2 to 9, characterized in that: The first wall is a bottom wall, and the slot is disposed on the bottom wall.

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

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