Battery device, electric equipment and heating device

Abstract

The embodiment of the utility model provides a battery device, electric equipment and a heating device. The battery device comprises a box body, a battery monomer and the heating device, the battery monomer is arranged in the box body and comprises a shell and an electrode assembly arranged in the shell; at least one of the box body and the shell is provided with a heating device, the heating device comprises a protective sleeve, a heating piece and a heat conduction structure, the protective sleeve is provided with a protective cavity, at least part of the heating piece is arranged in the protective cavity, the heat conduction structure is arranged between the protective sleeve and the heating piece, and the heating piece is connected with the protective sleeve through the heat conduction structure. The service life of the battery device is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, and more particularly, to a battery device, an electric device and a heating device. BACKGROUND

[0002] With the development of new energy technology, the application of battery device is more and more widely, such as applied to mobile phone, notebook computer, electric car, electric vehicle, electric aircraft, electric ship, electric toy car, electric toy ship, electric toy aircraft and electric tool, etc.

[0003] In the development of battery technology, how to improve the service life of the battery device is a technical problem to be solved in the battery technology. CONTENT OF THE INVENTION

[0004] In view of the above problems, the present application provides a battery device, an electric device and a heating device, which is beneficial to improve the service life of the battery device.

[0005] In a first aspect, the present application provides a battery device, comprising: a box body; a battery monomer arranged in the box body, the battery monomer comprising a shell and an electrode assembly arranged in the shell; a heating device, at least one of the box body and the shell is provided with the heating device, the heating device comprising a protective sleeve, a heating element and a heat conduction structure, the protective sleeve having a protective cavity, at least part of the heating element being arranged in the protective cavity, the heat conduction structure being arranged between the protective sleeve and the heating element, and the heating element being connected with the protective sleeve through the heat conduction structure.

[0006] In some embodiments of the first aspect, by arranging the heating device, the heating device is used to heat the battery monomer, so that the temperature of the battery monomer can be quickly raised to the preset temperature range, thereby improving the service life of the battery device. In addition, by arranging the heat conduction structure between the protective sleeve and the heating element, and connecting the heating element with the protective sleeve through the heat conduction structure, the heat conduction structure can improve the heat conduction capacity between the heating element and the protective sleeve, which is beneficial to the heat dissipation of the heating element itself, reduces the risk of dry burning of the heating element, thereby improving the reliability and service life of the heating device, and also improving the heat conduction capacity of the heating device to the battery monomer, thereby improving the reliability and service life of the battery device.

[0007] In some embodiments, the heating element is a heating wire. Such design is convenient to obtain and is beneficial to reduce the cost.

[0008] In some embodiments, the heating device further comprises a support body, the support body is arranged in the protective cavity, and the heating element is wound on the support body. By arranging in this way, the support body can support the heating element, so that the heat of the heating element can be better transferred to the protective sleeve, which is beneficial to better improve the heating effect of the heating device on the battery monomer.

[0009] In some embodiments, the heat-conducting structure comprises a connecting groove arranged on the protective sleeve and communicating with the protective cavity, and the heating element is embedded in the connecting groove and abuts against the protective sleeve.

[0010] In the above scheme, the heat-conducting structure can be a connecting groove arranged on the protective sleeve. By embedding the heating element in the connecting groove, the contact area between the heating element and the protective sleeve is increased, so that the heat of the heating element is more quickly transferred to the protective sleeve, thereby improving the heat dissipation capacity of the heating element.

[0011] In some embodiments, the heat-conducting structure comprises a heat-conducting layer arranged on the surface of the heating element facing the protective sleeve, and / or a heat-conducting layer arranged on the inner circumferential surface of the protective sleeve facing the protective cavity.

[0012] In the above scheme, the heat-conducting structure can be a heat-conducting layer arranged on the heating element and / or the protective sleeve. The heat-conducting layer can effectively conduct the heat of the heating element and transfer it to the protective sleeve, thereby reducing the temperature of the heating element and preventing the heating element from being damaged due to overheating, thereby improving the reliability of the battery device.

[0013] In some embodiments, the heat-conducting layer comprises any one of a heat-conducting silicone grease layer, a heat-conducting double-sided adhesive layer, and a graphene layer. By this arrangement, the use flexibility of the heating device is improved.

[0014] In some embodiments, the heating device further comprises a wear-resistant layer arranged on the outer circumferential surface of the protective sleeve facing away from the protective cavity.

[0015] In the above scheme, by arranging a wear-resistant layer on the outer circumferential surface of the protective sleeve, the wear resistance of the protective sleeve is improved, thereby improving the strength of the protective sleeve, thereby improving the structural strength of the heating device, and thereby improving the reliability of the battery device.

[0016] In some embodiments, the wear-resistant layer comprises any one of a ceramic composite film layer, a polyimide film layer, and an epoxy resin film layer. By this arrangement, the use flexibility of the heating device is improved.

[0017] In some embodiments, the heating device further comprises an electrical connector in electrically conductive connection with the heating element. By this arrangement, the reliability of the heating device is improved.

[0018] In some embodiments, the heating device further comprises a crimping member connected to the protective sleeve and arranged around the position where the heating element and the electrical connector are connected, so as to fix the heating element and the electrical connector. By this arrangement, the connection stability between the heating element and the electrical connector is improved, thereby improving the reliability of the heating device.

[0019] In a second aspect, the present application provides a battery device, comprising the battery device according to any one of the first aspect.

[0020] In a third aspect, the present application provides a heating device, comprising: a protective sleeve having a protective cavity; a heating element, at least part of the heating element being arranged in the protective cavity; and a heat-conducting structure arranged between the protective sleeve and the heating element, the heating element being connected to the protective sleeve through the heat-conducting structure.

[0021] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application, the following detailed description of the embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following detailed description of the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the drawings.

[0023] Figure 1 The structural schematic diagram of a vehicle is provided for some embodiments of the present application;

[0024] Figure 2 The exploded structural schematic diagram of a battery device is provided for some embodiments of the present application;

[0025] Figure 3 The exploded structural schematic diagram of a battery cell is provided for some embodiments of the present application;

[0026] Figure 4 The structural schematic diagram of a heating device is provided for some embodiments of the present application;

[0027] Figure 5 The exploded schematic diagram of a heating device is provided for some embodiments of the present application;

[0028] Figure 6 The partial sectional view of a protective sleeve in a heating device is provided for some embodiments of the present application;

[0029] Figure 7 The structural schematic diagram of a heating device is provided for some embodiments of the present application;

[0030] Figure 8 The side view of a heating device is provided for some embodiments of the present application.

[0031] The reference signs of the detailed description are as follows:

[0032] 1000, vehicle; 1, battery device; 2, controller; 3, motor; 4, battery cell assembly;

[0033] 100, battery cell; 110, housing; 1101, end cap; 1102, case; 120, electrode assembly; 130, electrode terminal; 140, pressure relief mechanism; 200, box; 210, first box; 220, second box;

[0034] 10, heating device;

[0035] 11, protective sleeve; 101, protective cavity; 132; 111, inner peripheral surface; 112, outer peripheral surface;

[0036] 12, heating member; 13, heat conducting structure; 131, connecting groove; 132, heat conducting layer;

[0037] 14, support body; 15, wear-resistant layer; 16, electrical connecting member; 17, pressure connecting member. DETAILED DESCRIPTION

[0038] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, and are not intended to describe a particular order or primary and secondary relationship.

[0040] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to the other embodiments.

[0041] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The term "and / or" in the present application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects have an "or" relationship.

[0043] In the embodiments of the present application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length and width of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0044] "Multiple" appearing in the present application means two or more (including two).

[0045] At present, from the development of market situation, the application of battery device is more and more extensive. The battery device is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery device, the demand of its market is also increasing.

[0046] In the embodiments of the present application, the battery monomer can be a secondary battery, which refers to a battery monomer that can be activated by charging after discharging.

[0047] The battery monomer can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc. The embodiments of the present application are not limited thereto.

[0048] The battery device cannot quickly enter the fast charging mode in a low temperature environment, which will affect the performance of the battery device, thereby reducing the service life of the battery device.

[0049] To address the aforementioned technical problems, this application provides a battery device, including a housing, a battery cell, and a heating device. The battery cell is disposed within the housing, and includes a casing and electrode components disposed within the casing. At least one of the housing and the casing is provided with a heating device, which includes a protective sleeve, a heating element, and a heat-conducting structure. The protective sleeve has a protective cavity, at least a portion of the heating element is disposed within the protective cavity, and the heat-conducting structure is disposed between the protective sleeve and the heating element. The heating element is connected to the protective sleeve via the heat-conducting structure.

[0050] By setting up a heating device, the temperature requirements for charging and discharging individual battery cells can be better met, allowing the temperature of individual battery cells to rise to the preset temperature range more quickly, thereby helping to improve the service life of the battery device.

[0051] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0052] It should be understood that the technical solutions described in the embodiments of this application are not limited to the devices described above, but can also be applied to all devices that use battery devices. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0053] For example, such as Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a vehicle 1000 according to one embodiment of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle 1000 can internally house a motor 3, a controller 2, and a battery device 1. The controller 2 controls the battery device 1 to supply power to the motor 3. For example, the battery device 1 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1 can be used to power the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation. In another embodiment of this application, the battery device 1 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle 1000.

[0054] Please see Figure 2The battery apparatus 1 mentioned in the embodiments of the present application can include one or more battery cell assemblies 4 for providing voltage and capacity. The battery cell assembly 4 can include a plurality of battery cells 100 connected in series, in parallel, or in a mixed connection through a busbar component.

[0055] In some embodiments, the battery cell assembly 4 is generally formed by arranging a plurality of battery cells 100.

[0056] In some embodiments, the battery apparatus 1 can be a battery pack including a box 200 and one or more battery cell assemblies 4 accommodated in the box 200.

[0057] As an example, the battery cell assembly 4 can be a battery module, which can be accommodated in the box 200 by fixing the battery module in the box 200.

[0058] As an example, the battery cell assembly 4 can also be accommodated in the box 200 by fixing the plurality of battery cells 100 directly in the box 200.

[0059] As an example, the box 200 can include a first box 210 and a second box 220. The first box 210 and the second box 220 are fastened to form an accommodation cavity, so that an enclosed space is formed inside the box 200 to accommodate the battery cell assembly 4. Here, enclosed means covered or closed, which can be sealed or unsealed. The first box 210 can be a top cover or a bottom plate.

[0060] As an example, the box 200 can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame, so that an enclosed space is formed inside the box 200 to accommodate the battery cell assembly 4.

[0061] In some embodiments, the box 200 can be part of the chassis structure of the vehicle 1000. For example, part of the box 200 can be at least part of the floor of the vehicle 1000, or part of the box 200 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0062] The box 200 can be a simple cuboid or a simple cylinder, or a complex cuboid or a complex cylinder formed by combining simple cuboids or simple cylinders, and the embodiments of the present application are not limited thereto.

[0063] Specifically, the box body 200 can be a metal shell made of alloy steel, alloy aluminum, etc., or a composite material shell made of metal and polypropylene, etc.

[0064] As an example, the battery cell assembly 4 can be a battery module formed by arranging and fixing a plurality of battery cells 100. As an example, the battery module can be formed by bundling a plurality of battery cells 100 with a cable tie.

[0065] Referring to Figure 3 , the battery cell 100 includes a shell 110, an electrode assembly 120, and an electrode terminal 130.

[0066] The shell 110 is a component for forming an internal environment of the battery cell 100, and the internal environment formed thereby can be used to accommodate the electrode assembly 120, and can also be used to accommodate electrolyte and other components. Optionally, the shell 110 can be, but is not limited to, made of a metal or a non-metal material, for example, the metal material can be copper, aluminum, or stainless steel, etc., and the non-metal material can be polyethylene, polypropylene, or polyvinyl chloride, etc.

[0067] For example, the shell 110 can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0068] In some embodiments, the shell 110 can be a sealed structure, or can also be a non-sealed structure. As an example, when the shell 110 is a non-sealed structure, the shell 110 plays a role of protecting the electrode assembly 120, and a sealing bag is further included between the shell 110 and the electrode assembly 120, which is used to package the electrode assembly 120 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the shell 110 is a sealed structure, it is used to package the electrode assembly 120, the electrolyte, and other components.

[0069] In some embodiments, the shell 110 includes an end cover 1101 and a shell body 1102, the shell body 1102 is provided with an opening, and the end cover 1101 is provided on the opening. The shell body 1102 can be provided with one or more openings. The end cover 1101 can also be provided with one or more openings.

[0070] The shape of the shell 110 can be determined according to the specific shape of the electrode assembly 120. For example, if the electrode assembly 120 is a cuboid structure, a cuboid shell can be selected; if the electrode assembly 120 is a cylindrical structure, a cylindrical shell can be selected.

[0071] The electrode assembly 120 is a component in which an electrochemical reaction occurs in the battery cell 100, and the shell 110 can contain one or more electrode assemblies 120.

[0072] In some embodiments, the electrode assembly 120 can have a cylindrical shape, a flat shape, or a multi-prism shape, etc.

[0073] The electrode assembly 120 can have a wound structure, a stacked structure, or a hybrid structure of the wound and stacked structures.

[0074] The electrode assembly 120 includes a positive electrode, a negative electrode, and a separator disposed between the negative electrode and the positive electrode. During the charging and discharging of the battery cell 100, active ions (e.g., lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator disposed between the positive electrode and the negative electrode can prevent the positive and negative electrodes from shorting while allowing the active ions to pass through.

[0075] In some embodiments, the housing 110 is provided with at least one electrode terminal 130 electrically connected to the tab of the electrode assembly 120. The electrode terminal 130 can be directly connected to the tab or indirectly connected to the tab through a current collecting member.

[0076] The electrode terminal 130 can be used to electrically connect to the electrode assembly 120 for outputting or inputting the electrical energy of the battery cell 100. The electrode terminal 130 can be electrically connected to the electrode assembly 120 by being connected to the tab. The tab electrically connected to the electrode terminal 130 can be a positive electrode tab or a negative electrode tab.

[0077] In some embodiments, the housing 110 is provided with a pressure relief mechanism 140. The pressure relief mechanism 140 is used to discharge the internal gas of the battery cell 100.

[0078] In this application, the battery cell 100 can include, but is not limited to, one of a lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell.

[0079] As an example, the battery cell 100 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or other shaped battery cells, and the prismatic battery cell includes a square battery cell, a blade battery cell, a multi-prismatic battery cell, such as a hexagonal battery cell, etc.

[0080] Please refer to Figure 2 to Figure 5According to the embodiment of the present application, a battery device 1 is provided, which comprises a box 200, a battery cell 100 and a heating device 10. The battery cell 100 is arranged in the box 200, and the battery cell 100 comprises an outer shell 110 and an electrode assembly 120 arranged in the outer shell. At least one of the box 200 and the outer shell 110 is provided with the heating device 10, and the heating device 10 comprises a protective sleeve 11, a heating element 12 and a heat conduction structure 13. The protective sleeve 11 has a protective cavity 101. At least part of the heating element 12 is arranged in the protective cavity 101. The heat conduction structure 13 is arranged between the protective sleeve 11 and the heating element 12, and the heating element 12 is connected to the protective sleeve 11 through the heat conduction structure 13.

[0081] The heating device 10 is used for heating the battery cell 100. By arranging the heating device 10 with the heating function and the improved heat conduction capacity, the temperature requirement of the battery cell 100 for charging and discharging can be better met, the temperature of the battery cell 100 can be quickly raised to the preset temperature range, and the service life of the battery device 1 can be improved.

[0082] The protective sleeve 11 is used for protecting the heating element 12, so as to reduce the direct contact of the heating element 12 with the external environment, avoid the energy loss, improve the heat conduction efficiency, and prevent the oxidation or corrosion of the heating element 12.

[0083] The protective sleeve 11 can be connected to the box 200 and / or the outer shell 110, so that the heating device 10 heats the battery cell 100. The protective sleeve 11 can be made of an insulating material to prevent the heating element 12 from being electrically connected to the box 200 or the outer shell 110. The insulating material can include aluminum oxide, silicon oxide, etc. For example, the protective sleeve 11 can be a silica gel sleeve.

[0084] The heating element 12 can be entirely located in the protective cavity 101 to be protected by the protective sleeve 11, or can partially extend out of the protective cavity 101. It can be understood that the heating element 12 extending out of the protective cavity 101 should be coated with an insulating material or wrapped or separated by other insulating materials to avoid the electrical connection with external components.

[0085] Optionally, the heating element can be an electric heating component, i.e., an element that can convert electrical energy into heat energy. The heating element 12 can be connected to an external power source through an electrical connector 16 to realize the heating function.

[0086] The heat conduction structure 13 is used for improving the heat conduction capacity between the heating element 12 and the protective sleeve 11. After the heating element 12 is connected to the protective sleeve 11 through the heat conduction structure 13, the heat conduction capacity of the heating element 12 to the protective sleeve 11 through the heat conduction structure 13 is greater than the heat conduction capacity of the heating element 12 to the protective sleeve 11 directly.

[0087] In the related art, the heating device may have a dry burning risk due to the slow heat dissipation of the heating element during use.

[0088] In the embodiments of the present application, the heat conduction structure 13 is arranged between the protective sleeve 11 and the heating element 12, and the heating element 12 is connected to the protective sleeve 11 through the heat conduction structure 13. The heat conduction structure 13 can improve the heat conduction capacity between the heating element 12 and the protective sleeve 11, which is conducive to the heat dissipation of the heating element 12 and reduces the risk of dry burning of the heating element 12, thereby improving the reliability and service life of the heating device 10. In addition, the heat of the heating element 12 can be quickly transferred to the protective sleeve 11 through the heat conduction structure 13, which is also conducive to improving the heat conduction capacity of the heating device 10 to the battery monomer 100, thereby improving the heating effect of the heating device 10 on the battery monomer 100, so that the battery monomer 100 can be quickly heated in a low-temperature state to improve the performance and service life of the battery device 1.

[0089] Optionally, the heating device 10 can be provided in a straight line structure, or in an arc structure, or in a polyline structure. The shape of the heating device 10 can be set according to requirements.

[0090] In some embodiments, the box body 200 can be provided with a heating device 10. Optionally, the heating device 10 can be arranged on the side of the box body 200 facing the battery monomer 100, or on the side of the box body 200 away from the battery monomer 100.

[0091] Optionally, the heating device 10 can be arranged on the first box body 210 or on the second box body 220.

[0092] One, two or more heating devices 10 can be arranged on the box body 200. The heating devices 10 can be arranged at positions with high heating requirements, which is conducive to improving the heat conduction efficiency of the heating device 10 to the battery monomer 100, reducing costs, and improving flexible use.

[0093] In some embodiments, the shell 110 can also be provided with a heating device 10. Optionally, the heating device 10 can be arranged on the side of the shell 110 away from the electrode assembly 120 to achieve the heating effect on the battery monomer 100. Further, the heating device 10 can be arranged on the side of the shell 1102 away from the electrode assembly 120.

[0094] In some embodiments, the box body 200 and the shell 110 can be respectively provided with a heating device 10.

[0095] In some alternative embodiments, the heating element 12 can be provided as a heating wire. The heating wire can include a metal wire structure, which includes but is not limited to any one of iron-chromium-aluminum alloy, nickel-chromium alloy, copper-nickel alloy, stainless steel, etc., and the heating wire can also include a non-metal structure, such as carbon fiber.

[0096] The heating wire has a small area and is easy to change shape, so that it can be arranged at any position of the shell 110 or the box 200 according to requirements, is easy to obtain, and is conducive to reducing costs.

[0097] Alternatively, the heating element 12 can also be provided as a heating plate or a heating strip.

[0098] The heating element 12 is connected with the protective sleeve 11 through the heat-conducting structure 13, wherein the heating element 12 can be adhesively connected with the protective sleeve 11 through the heat-conducting structure 13, and the heating element 12 can also be abuttingly connected with the protective sleeve 11 through the heat-conducting structure 13.

[0099] Alternatively, the heat-conducting structure 13 can be heat-conducting glue provided on a side surface of the protective sleeve 11 facing the heating element 12, or the heat-conducting structure 13 can also be heat-conducting glue provided on a side surface of the heating element 12 facing the protective sleeve 11, and the heating element 12 is adhesively connected with the protective sleeve 11 through the heat-conducting glue to improve the heat-conducting capacity between the heating element 12 and the protective sleeve 11.

[0100] Alternatively, the heat-conducting structure 13 can be a groove provided on a side surface of the protective sleeve 11 facing the heating element 12, and the heat-conducting structure 13 is arranged in the groove to abut against the protective sleeve 11 to increase the contact area between the heating element 12 and the protective sleeve 11, thereby facilitating the increase of the heat-conducting area of the heating element 12 and the protective sleeve 11.

[0101] Please refer to Figure 5 In some alternative embodiments, the heating device 10 further includes a support body 14, and the support body 14 is arranged in the protective cavity 101, and the heating element 12 is wound around the support body 14.

[0102] The support body 14 can be made of insulating material and has a certain strength to support the heating element 12. Alternatively, the support body 14 can be made of synthetic fiber material, such as glass fiber, ceramic fiber, etc.

[0103] The heating element 12 is wound around the support body 14, which can be understood as that the heating element 12 can be provided as a spiral structure. By this way, when the heating element 12 and the support body 14 are assembled, the heating power can be adjusted by changing the pitch of the heating element 12, which is flexible. Specifically, the more dense the position of the heating element 12 is, the higher the heating efficiency is.

[0104] The battery device 1 provided by some embodiments of the present application can prevent the heating element 12 from deforming or displacing by arranging the support body 14 to support the heating element 12, thereby improving the reliability of the heating device 10 and the battery device 1, and further enabling the heat of the heating element 12 to be better transferred to the protective sleeve 11, thereby improving the heating effect of the heating device 10 on the battery monomer 100 and the service life of the battery device 1.

[0105] Please refer to Figure 5 and Figure 6 In some optional embodiments, the heat-conducting structure 13 comprises a connecting groove 131 arranged in the protective sleeve 11 and communicating with the protective cavity 101, and the heating element 12 is embedded in the connecting groove 131 and abuts against the protective sleeve 11.

[0106] The heating device 10 provided by some embodiments of the present application can be arranged as the connecting groove 131 on the protective sleeve 11, and the heating element 12 is embedded in the connecting groove 131 to be connected with the protective sleeve 11, thereby increasing the contact area between the heating element 12 and the protective sleeve 11, making the contact between the heating element 12 and the protective sleeve 11 more closely, and enabling the heat of the heating element 12 to be more quickly transferred to the protective sleeve 11 to improve the heat dissipation capacity of the heating element 12.

[0107] The connecting groove 131 should match the shape of the heating element 12, which can be a spiral structure or a linear structure.

[0108] Please continue to refer to Figure 5 In some optional embodiments, the heat-conducting structure 13 comprises a heat-conducting layer 132, the surface of the heating element 12 facing the protective sleeve 11 is provided with the heat-conducting layer 132, and / or the protective sleeve 11 has an inner circumferential surface 111 facing the protective cavity 101 and provided with the heat-conducting layer 132.

[0109] The heat-conducting layer 132 can be arranged on at least one of the heating element 12 and the protective sleeve 11 by a process such as immersion or coating.

[0110] The heat-conducting layer 132 can not only effectively conduct the heat of the heating element 12, but also play a role in bonding and fixing, thereby ensuring that the heating element 12 and the protective sleeve 11 remain stably connected in a vibrating or temperature-varying environment, and the heat-conducting layer 132 can also reduce thermal resistance, which helps to reduce the resistance in the heat conduction path from the heating element 12 to the protective sleeve 11, thereby improving the heat conduction efficiency.

[0111] The battery device 1 provided by some embodiments of the present application can be provided with the heat conduction structure 13, which can be a heat conduction layer 132 arranged on the heating element 12 and / or the protective sleeve 11. The heat conduction layer 132 can effectively conduct the heat of the heating element 12 and transfer it to the protective sleeve 11, so as to reduce the temperature of the heating element 12 and prevent the heating element 12 from being damaged due to overheating. In addition, the heat conduction layer 132 can also provide protection for the heating element 12 together with the protective sleeve 11, which is conducive to further improving the reliability and service life of the heating device 10, and thus the reliability and service life of the battery device 1.

[0112] Optionally, the heat conduction layer 132 is arranged on the surface of the heating element 12 facing the protective sleeve 11, or the heat conduction layer 132 is arranged on the inner circumferential surface 111 of the protective sleeve 11, or the heat conduction layer 132 is arranged on both the surface of the heating element 12 facing the protective sleeve 11 and the inner circumferential surface 111 of the protective sleeve 11.

[0113] Optionally, the heat conduction structure 13 includes the connecting groove 131 and the heat conduction layer 132, and the heat conduction layer 132 is arranged between the heating element 12 and the connecting groove 131, and the heating element 12 is embedded in the connecting groove 131 and bonded to the protective sleeve 11 through the heat conduction layer 132.

[0114] In some embodiments, the heat conduction layer 132 is arranged on the outer surface of the heating element 12.

[0115] In order to facilitate manufacturing, in some optional embodiments, the heating element 12 can be first wound and assembled on the support body 14 to form an integral whole, and then the heat conduction layer 132 is arranged on the surface of the integral whole.

[0116] The heat conduction layer 132 can fill the gap between the heating element 12, the support body 14 and the protective sleeve 11, so as to increase the area of the heating element 12 connected to the protective sleeve 11 through the heat conduction layer 132, which is conducive to better improving the heat conduction efficiency.

[0117] In some optional embodiments, the heat conduction layer 132 includes any one of a heat conduction silicone grease layer, a heat conduction double-sided adhesive layer and a graphene layer.

[0118] The heat conduction silicone grease layer is a paste structure layer with high heat conduction and low thermal resistance. It is mainly made of organic silicone as the main raw material and materials with excellent heat resistance and heat conduction performance. It is conducive to improving the efficiency of heat transfer and prolonging the service life of electronic components, and has good electrical insulation. The heat conduction double-sided adhesive layer is a material layer composed of acrylic polymer filled with heat conduction ceramic powder and organic silicone adhesive. It has excellent high heat conduction and is easy to manufacture. The graphene layer is a two-dimensional crystal material layer composed of single-layer carbon atoms. It can not only improve the heat conduction efficiency, but also reduce the interface thermal phase and improve the heat dissipation performance.

[0119] The battery device 1 provided by some embodiments of the present application, the heat-conducting layer 132 can be any of the above-mentioned coating layers, which is conducive to improving the flexibility of the heating device 10, thereby improving the flexibility of the battery device 1.

[0120] Please refer to Figure 7 and Figure 8 In some optional embodiments, the heating device 10 further comprises a wear-resistant layer 15, and the outer peripheral surface 112 of the protective sleeve 11 away from the protective cavity 101 is provided with the wear-resistant layer 15.

[0121] The wear-resistant layer 15 is used to improve the wear resistance of the outer peripheral surface 112 of the protective sleeve 11, thereby improving the wear resistance of the heating device 10 as a whole, so as to effectively reduce the risk of insulation failure caused by wear or damage of the protective sleeve 11.

[0122] The battery device 1 provided by some embodiments of the present application, by providing the wear-resistant layer 15 on the outer peripheral surface 112 of the protective sleeve 11, the wear-resistant ability of the protective sleeve 11 is improved, thereby improving the strength of the protective sleeve 11, and further improving the structural strength of the heating device 10. In addition, the wear-resistant layer 15 can also provide protection for the heating element 12 together with the protective sleeve 11, which is conducive to further improving the reliability and service life of the battery device 1.

[0123] In some optional embodiments, the wear-resistant layer 15 comprises any of a ceramic composite film layer, a polyimide film layer, and an epoxy resin film layer.

[0124] The ceramic composite film layer is a film layer composed of ceramic material and metal substrate, which has the advantages of high strength, high temperature resistance, corrosion resistance, etc.; the polyimide film layer is mainly composed of polyimide resin, solvent and other additives, which has good mechanical strength, wear resistance, high temperature resistance and corrosion resistance, and excellent electrical insulation; the epoxy resin film layer is a film layer composed of epoxy resin and curing agent, which has good electrical insulation and good wear resistance and corrosion resistance.

[0125] The battery device 1 provided by some embodiments of the present application, the wear-resistant layer 15 can be any of the above-mentioned film layers, which is conducive to improving the flexibility of the heating device 10, thereby improving the flexibility of the battery device 1.

[0126] In some optional embodiments, the wear-resistant layer 15 can further comprise a polyethylene terephthalate film (PET) film layer.

[0127] Please continue to refer to Figure 4 and Figure 5 In some optional embodiments, the heating device 10 further comprises an electrical connecting piece 16, and the electrical connecting piece 16 is in conductive connection with the heating element 12.

[0128] The electric connecting member 16 is used to connect with an external power supply member, so that the external power supply member can supply power to the heating member 12 through the electric connecting member 16, thereby enabling the heating member 12 to realize the heating function.

[0129] The battery device 1 provided by some embodiments of the present application can ensure the safety performance of the heating device 10 by setting the electric connecting member 16 to meet the requirement of supplying power to the heating member 12, thereby facilitating the improvement of the reliability of the battery device 1.

[0130] The electric connecting member 16 can extend into the protection cavity 101 to be electrically connected with the heating member 12, and the heating member 12 can also extend out of the protection cavity 101 to be electrically connected with the electric connecting member 16.

[0131] In some embodiments, the electric connecting member 16 includes any one of an electric wire, a busbar, etc., and the heating member 12 and the electric connecting member 16 can be connected integrally by welding, which is reliable.

[0132] In some embodiments, the electric connecting member 16 includes a terminal, and the heating member 12 can be inserted into a corresponding hole of the terminal first, and then be fixed by screwing, which is convenient for the subsequent maintenance and replacement of the heating member 12.

[0133] Please continue to refer to Figure 4 and Figure 5 In some optional embodiments, the heating device 10 further includes a crimping member 17 connected to the protective sleeve 11 and sleeved on the position where the heating member 12 and the electric connecting member 16 are connected, so as to fix the heating member 12 and the electric connecting member 16.

[0134] For example, the electric connecting member 16 can be an electric wire.

[0135] The heating member 12 and the electric connecting member 16 are crimped integrally by setting the crimping member 17, which is conducive to improving the connection stability between the heating member 12 and the electric connecting member 16, and part of the crimping member 17 is also connected with the protective sleeve 11, which is conducive to improving the stability of the crimping member 17 to prevent displacement and loosening, thereby improving the reliability of the heating device 10 and the battery device 1.

[0136] The crimping member 17 is connected to the outer circumferential surface 112 of the protective sleeve 11, which is convenient for assembly and can also reduce the occupation of the protection cavity 101, so that more heating members 12 can be arranged in the protection cavity 101 to improve the heat conduction efficiency of the heating device 10.

[0137] Optionally, the crimping member 17 can be provided in a whole annular structure, or in an annular structure with an intermittent structure.

[0138] As shown in the figures, in some alternative embodiments, the crimping member 17 can also be sleeved on the heating member 12 and the support 14 to fix the heating member 12 and the support 14, so as to better fix the position of the heating member 12 and prevent it from being displaced or shaken. Figure 5

[0139] Please refer to Figure 2 to Figure 8 , the present application provides a battery device 1, the battery device 1 includes a box body 200, a battery monomer 100 and a heating device 10, the heating device 10 includes a protective sleeve 11, a heating member 12, a heat conduction layer 132, a support 14, a wear-resistant layer 15, an electrical connecting member 16 and a crimping member 17.

[0140] The heating device 10 is arranged on the box body 200, the protective sleeve 11 has a protective cavity 101, the outer peripheral surface 112 of the protective sleeve 11 away from the protective cavity 101 is provided with the wear-resistant layer 15, the support 14 is arranged in the protective cavity 101, and part of the heating member 12 is arranged in the protective cavity 101 and wound on the support 14. The heat conduction layer 132 is arranged between the heating member 12 and the protective sleeve 11, the heat conduction layer 132 includes a heat-conducting silicone layer, and the heating member 12 is bonded to the protective sleeve 11 through the heat conduction layer 132. The electrical connecting member 16 is in conductive connection with the heating member 12, and the crimping member 17 is connected to the protective sleeve 11 and sleeved on the heating member 12 and the electrical connecting member 16 to fix the heating member 12 and the electrical connecting member 16.

[0141] According to some embodiments of the present application, the present application also provides a power-using equipment, which includes the battery device 1, the battery monomer 100 or the battery device 1 provided by any one of the above embodiments, and the battery monomer 100 or the battery device 1 is used for storing or providing electric energy.

[0142] Please refer to Figure 4 and Figure 5 , according to the embodiments of the present application, a heating device 10 is provided, which includes a protective sleeve 11, a heating member 12 and a heat conduction structure 13. The protective sleeve 11 has a protective cavity 101. At least part of the heating member 12 is arranged in the protective cavity 101. The heat conduction structure 13 is arranged between the protective sleeve 11 and the heating member 12, and the heating member 12 is connected to the protective sleeve 11 through the heat conduction structure 13.

[0143] ​The heating device 10 provided by some embodiments of the present application has the heat-conducting structure 13 arranged between the protective sleeve 11 and the heating element 12, and the heating element 12 is connected with the protective sleeve 11 through the heat-conducting structure 13. The heat-conducting structure 13 can improve the heat-conducting capacity between the heating element 12 and the protective sleeve 11, facilitate the heat dissipation of the heating element 12, reduce the risk of dry burning of the heating element 12, thereby improving the reliability and service life of the heating device 10. In addition, the heat of the heating element 12 can be transmitted to the protective sleeve 11 through the heat-conducting structure 13 more quickly, which is also conducive to improving the overall heat-conducting capacity of the heating device 10, thereby improving the heating effect of the heating device 10 on external components.

[0144] For a better understanding of the present application, reference will be made to the following embodiments thereof by way of example, and without limitation, with reference to the accompanying drawings, wherein: Figure 4 to Figure 8 The present application provides a heating device 10, which comprises a protective sleeve 11, a heating element 12, a heat-conducting layer 132, a support body 14, a wear-resistant layer 15, an electrical connecting element 16 and a compression element 17.

[0145] The protective sleeve 11 has a protective cavity 101, and the wear-resistant layer 15 is arranged on the outer circumferential surface 112 of the protective sleeve 11 away from the protective cavity 101. The support body 14 is arranged in the protective cavity 101, and part of the heating element 12 is arranged in the protective cavity 101 and wound around the support body 14. The heat-conducting layer 132 is arranged between the heating element 12 and the protective sleeve 11, and the heat-conducting layer 132 comprises a heat-conducting silicone layer. The heating element 12 is bonded to the protective sleeve 11 through the heat-conducting layer 132. The electrical connecting element 16 is electrically connected to the heating element 12, and the compression element 17 is connected to the protective sleeve 11 and arranged around the position where the heating element 12 and the electrical connecting element 16 are connected, so as to fix the heating element 12 and the electrical connecting element 16.

[0146] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to some technical features, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery device, characterized by, The battery device comprises: a box; a battery monomer arranged in the box, the battery monomer comprising a shell and an electrode assembly arranged in the shell; a heating device, at least one of the box and the shell being provided with the heating device, the heating device comprising a protective sleeve, a heating element and a heat-conducting structure, the protective sleeve having a protective cavity, at least part of the heating element being arranged in the protective cavity, the heat-conducting structure being arranged between the protective sleeve and the heating element, the heating element being connected with the protective sleeve through the heat-conducting structure.

2. The battery device according to claim 1, characterized by The heating element is a heating wire.

3. The battery device of claim 1, wherein The heating device further comprises a support body, the support body being arranged in the protective cavity, and the heating element being wound around the support body.

4. The battery device of claim 1, wherein The heat-conducting structure comprises a connecting groove, the connecting groove being arranged in the protective sleeve and communicating with the protective cavity, the heating element being embedded in the connecting groove and abutting against the protective sleeve.

5. The battery device of claim 1, wherein The heat-conducting structure comprises a heat-conducting layer, the heating element being provided with the heat-conducting layer on a surface thereof facing the protective sleeve, and / or the protective sleeve being provided with the heat-conducting layer on an inner peripheral surface thereof facing the protective cavity.

6. The battery device of claim 5, wherein, The heat-conducting layer comprises any one of a heat-conducting silicone grease layer, a heat-conducting double-sided adhesive tape layer and a graphene layer.

7. The battery device according to any one of claims 1 to 6, characterized by, The heating device further comprises a wear-resistant layer, the protective sleeve being provided with the wear-resistant layer on an outer peripheral surface thereof away from the protective cavity.

8. The battery device of claim 7, wherein, The wear-resistant layer comprises any one of a ceramic composite film layer, a polyimide film layer and an epoxy resin film layer.

9. The battery device according to any one of claims 1 to 6, characterized by The heating device further comprises an electrical connector, the electrical connector being in conductive connection with the heating element.

10. The battery device of claim 9, wherein, The heating device further comprises a crimping element, the crimping element being connected to the protective sleeve and sleeved on a position where the heating element and the electrical connector are connected, so as to fix the heating element and the electrical connector.

11. An electrical device, characterized by The battery device is used for storing or providing electric energy.

12. A heating device, characterized by The battery device comprises: a protective sleeve having a protective cavity; a heating element, at least part of the heating element being arranged in the protective cavity; a heat-conducting structure, the heat-conducting structure being arranged between the protective sleeve and the heating element, the heating element being connected with the protective sleeve through the heat-conducting structure.

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