Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment. The battery device comprises a box body, a heating piece and a battery monomer, the box body is provided with a containing cavity and comprises a first wall. The battery monomers are arranged in the accommodating cavity; the heating pieces are arranged on the first wall and connected with the battery monomers, the heating pieces are heating wires, at least two heating pieces are distributed at intervals and connected to the power supply circuit in parallel. The performance of the battery device is improved.

Description

Technical Field

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

[0002] With the development of new energy technologies, battery devices are being used more and more widely, for example, in mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools.

[0003] In the development of battery technology, how to improve the performance of battery devices is a technical problem that needs to be solved urgently. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which are beneficial to improving the performance of the battery device.

[0005] In a first aspect, the present application provides a battery device, comprising: a box body having a accommodating cavity, the box body comprising a first wall; a battery cell arranged in the accommodating cavity; a heating element arranged on the first wall and connected to the battery cell, the heating element being a heating wire, and the number of the heating elements is multiple, and at least two heating elements are distributed at intervals and connected in parallel to a power supply circuit.

[0006] In some embodiments of the first aspect, by providing a heating element for heating the battery cell on the first wall, the temperature of the battery cell can be increased to a preset range to ensure the safe operation of the battery cell, and by setting the number of heating elements to be multiple, and at least two heating elements are distributed at intervals and arranged in parallel with the power supply circuit, it is beneficial to increase the heating power of the heating element, thereby improving the heating effect of the heating element on the battery cell, so that the temperature of the battery cell can be increased faster, thereby helping to improve the performance of the battery device.

[0007] In some embodiments, the heating element is a strip-shaped structure and is bent and arranged on the first wall. By arranging in this way, the flexibility of the layout of the heating element can be improved and the cost can be reduced.

[0008] In some embodiments, the first wall is provided with a groove communicating with the accommodating cavity, a plurality of heating elements are respectively embedded in the groove, and the battery cells are respectively connected to the heating elements and the first wall.

[0009] By embedding the heating element in the groove provided in the first wall, the connection between the heating element and the first wall is made more stable, which is beneficial to reducing the possibility of shaking or displacement of the heating element. In addition, because the heating element is embedded in the first wall, the heating element and the first wall are arranged more closely, which is beneficial to improving the connection strength between the battery cell and the first wall, thereby improving the structural strength of the battery device, and further improving the reliability of the battery device.

[0010] In some embodiments, there are multiple grooves, and the grooves are arranged one-to-one with the heating element. By arranging in this way, the layout is reasonable, which is convenient for positioning and assembling the heating element.

[0011] In some embodiments, the battery device further includes a first adhesive layer, which is disposed between the battery cell and the first wall, and the battery cell is respectively bonded to the first wall and the heating element through the first adhesive layer.

[0012] In the above solution, the battery cell can be respectively bonded to the first wall and the heating element through a first bonding layer, which is beneficial to improve the strength between the battery cell and the first wall and make the battery device more reliable.

[0013] In some embodiments, the battery device further comprises a second adhesive layer, which is disposed between the heating element and the groove, and the heating element is bonded to the first wall via the second adhesive layer. This arrangement is conducive to improving the stability of the connection between the heating element and the first wall, thereby facilitating improving the reliability of the battery device.

[0014] In some embodiments, at least one of the first adhesive layer and the second adhesive layer includes any one of a thermal conductive adhesive layer, a thermal conductive potting adhesive layer, and a silicone rubber layer.

[0015] In the above solution, the first adhesive layer and / or the second adhesive layer can not only play a bonding role, but also play a heat conductive role, which is beneficial to improve the heat conductivity of the heating element to the battery cell and / or the first wall.

[0016] In some embodiments, the groove is a strip-shaped structure and is bent on the first wall.

[0017] In the above scheme, the grooves can be evenly and flexibly arranged on the first wall, so that the heating element can be arranged more flexibly and can evenly heat the battery cells. In addition, the grooves of the strip structure can effectively disperse and withstand external forces, which is beneficial to increase the structural stability of the first wall, and further help to improve the structural strength of the box.

[0018] In some embodiments, the groove includes a plurality of first groove sections extending along the first direction and spaced apart along the second direction, and a second groove section connected between two adjacent first groove sections, and the first direction intersects the second direction. By setting in this way, the groove can be arranged in a wider range on the first wall, so that the heating element can be arranged in a wider range, which is conducive to improving the heating effect of the heating element.

[0019] In some embodiments, a plurality of battery cells are provided, the first wall has a first surface facing the accommodating cavity, the first surface is provided with a notch connecting the groove and the accommodating cavity, and in the direction from the battery cell to the first wall, the orthographic projection of each battery cell overlaps with the orthographic projection of the first surface and overlaps with the orthographic projection of the heating element respectively.

[0020] In the above scheme, it can be ensured that each battery cell can be connected to the heating element and the first surface, which can ensure that each battery cell can be heated by the heating element to improve the uniformity of heating the battery cell by the heating element, and can also ensure that each battery cell can be connected to the first surface to improve the connection strength between the battery cell and the first wall.

[0021] In some embodiments, the first wall has a plurality of heating zones, each of which is connected to a battery cell, and each of which is provided with a heating element.

[0022] In the above scheme, each heating element can only heat the battery cells located in the heating zone corresponding to it. Heating elements with different resistances can be arranged according to the heating requirements of different heating zones to meet the differentiated heating requirements of the battery device, which is conducive to improving the flexibility of use.

[0023] In some embodiments, the number of heating zones and the number of heating elements are two, and there is an intersection line between the two heating zones, and the two heating elements are arranged in mirror symmetry with respect to the intersection line. This arrangement facilitates the assembly and layout of the heating elements.

[0024] In some embodiments, the first wall has a plurality of heating zones, each of which is connected to a battery cell, and in a direction from the battery cell to the first wall, an orthographic projection of each heating element overlaps with an orthographic projection of each heating zone.

[0025] In the above solution, each heating element can heat the battery cells located in each heating zone to prevent the problem of local heating failure of the battery device when a certain heating element fails, which is beneficial to improving the reliability of the battery device.

[0026] In some embodiments, there are two heating elements, one of which is arranged around the other. Arranged in this way, it is convenient to assemble and layout the heating elements.

[0027] In some embodiments, the box includes a first box and a second box connected along its height direction, the first box and the second box enclose a receiving cavity, and the second box includes a first wall spaced apart from the first box along the height direction. This arrangement makes the layout reasonable and helps reduce costs.

[0028] In some embodiments, the battery device further includes a plurality of shunt components, the heating element has a first end and a second end opposite to each other along its extension direction, the first ends of at least two heating elements are electrically connected to any one of the shunt components, and the second ends of at least two heating elements are electrically connected to any other one of the shunt components. This arrangement helps ensure the effectiveness of the heating element being connected in parallel to the power supply circuit.

[0029] In a second aspect, the present application provides an electrical device, comprising a battery device provided according to any embodiment of the first aspect, the battery device being used to store or provide electrical energy.

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

[0032] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

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

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

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

[0036] Figure 5 A partial top view of a box in a battery device provided in some embodiments of the present application;

[0037] Figure 6 A schematic diagram of the structure of a heating element in a battery device provided in some embodiments of the present application;

[0038] Figure 7 A partial top view of a box in a battery device provided in some other embodiments of the present application;

[0039] Figure 8 A schematic diagram of the structure of a heating element in a battery device provided in some embodiments of the present application.

[0040] The reference numerals of the specific embodiments are as follows:

[0041] 100. Vehicle; 1. Battery device; 2. Controller; 3. Motor; 4. Battery cell assembly;

[0042] 10, box body; 101, accommodating chamber; 110, first box body; 120, second box body; 11, first wall; 1001, first surface; 111, groove; 1111, first groove section; 1112, second groove section; 112, heating zone; 1121, intersection line;

[0043] 20. Battery cell; 21. Shell; 211. End cap; 212. Shell; 22. Electrode assembly; 23. Electrode terminal; 24. Pressure relief mechanism;

[0044] 30. Heating element; 31. First end; 32. Second end; 40. Diverter assembly;

[0045] X, height direction; Y, first direction; Z, second direction. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application 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 drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0048] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places 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.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can 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 application generally indicates that the associated objects before and after are in an "or" relationship.

[0051] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0052] The term “plurality” used in this application refers to two or more (including two).

[0053] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices 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 battery devices, the market demand is also constantly expanding.

[0054] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0055] The battery cell 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., which is not limited in the embodiments of the present application.

[0056] The battery cells of the battery device cannot quickly enter the fast charging mode in a low temperature environment. Therefore, in order to improve the performance of the battery device, it is necessary to design the battery cells to be heated in a low temperature environment. In the related art, the design of the heating element in the battery device cannot meet the demand for rapid heating of the battery cells in a low temperature environment.

[0057] Based on the above technical problems, the present application provides a battery device, including a box, a heating element and a battery cell. The box has a receiving cavity, and the box includes a first wall. The battery cell is arranged in the receiving cavity. The heating element is arranged on the first wall and connected to the battery cell, and the heating element is a heating wire, and the number of the heating elements is multiple, and at least two heating elements are distributed at intervals and connected in parallel to the power supply circuit.

[0058] By setting the number of heating elements to be multiple, and at least two heating elements are distributed at intervals and arranged in parallel with the power supply circuit, it is beneficial to increase the heating power of the heating element, thereby improving the heating effect of the heating element on the battery cell, so that the temperature of the battery cell can rise faster, thereby helping to improve the performance of the battery device.

[0059] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0060] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0061] For example, Figure 1 As shown, Figure 1 This is a structural schematic diagram of a vehicle 100 according to an embodiment of the present application. The vehicle 100 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 3, a controller 2 and a battery device 1 may be provided inside the vehicle 100. The controller 2 is used to control the battery device 1 to power the motor 3. For example, a battery device 1 may be provided at the bottom, front or rear of the vehicle 100. The battery device 1 may be used to power the vehicle 100. For example, the battery device 1 may be used as an operating power source for the vehicle 100, for the circuit system of the vehicle 100, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 100. In another embodiment of the present application, the battery device 1 may not only be used as an operating power source for the vehicle 100, but also as a driving power source for the vehicle 100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100.

[0062] See also Figure 2 The battery apparatus 1 mentioned in the embodiment of the present application may include one or more battery cell assemblies 4 for providing voltage and capacity. The battery cell assembly 4 may include a plurality of battery cells 20, and the plurality of battery cells 20 are connected in series, in parallel or in mixed connection through a busbar component.

[0063] In some embodiments, the battery cell assembly 4 (Battery Cell Assembly) is generally formed by arranging a plurality of battery cells 20 .

[0064] As an example, the battery cell assembly 4 may be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells 20 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 20 by a cable tie.

[0065] See also Figure 3 The battery cell 20 includes a housing 21 , an electrode assembly 22 and an electrode terminal 23 .

[0066] The housing 21 is a component used to form an internal environment of the battery cell 20. The internal environment formed by the housing 21 can be used to accommodate the electrode assembly 22, and can also be used to accommodate electrolyte and other components. Optionally, the housing 21 can be made of, but not limited to, metal or non-metal materials. For example, the metal material can be copper, aluminum or stainless steel, etc.; the non-metal material can be polyethylene, polypropylene or polyvinyl chloride, etc.

[0067] For example, the housing 21 may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0068] In some embodiments, the housing 21 may be a sealed structure or a non-sealed structure. As an example, when the housing 21 is a non-sealed structure, the housing 21 plays a role in protecting the electrode assembly 22, and a sealed bag is also included between the housing 21 and the electrode assembly 22, and the sealed bag is used to encapsulate the electrode assembly 22 and the electrolyte. Specifically, the sealed bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing 21 is a sealed structure, it is used to encapsulate the electrode assembly 22, the electrolyte and other components.

[0069] In some embodiments, the housing 21 includes an end cap 211 and a shell 212. The shell 212 is provided with an opening, and the end cap 211 is provided to cover the opening. The shell 212 may be provided with one or more openings. One or more end caps 211 may also be provided.

[0070] The shape of the shell 21 can be determined according to the specific shape of the electrode assembly 22. For example, if the electrode assembly 22 is a rectangular parallelepiped structure, a rectangular shell can be selected; if the electrode assembly 22 is a cylindrical structure, a cylindrical shell can be selected.

[0071] The electrode assembly 22 is a component in the battery cell 20 where electrochemical reactions occur. The housing 21 may contain one or more electrode assemblies 22 .

[0072] In some embodiments, the shape of the electrode assembly 22 can be cylindrical, flat, or polygonal.

[0073] The electrode assembly 22 may be a wound structure, a laminated structure, or a mixed structure of a wound structure and a laminated structure.

[0074] The electrode assembly 22 includes a positive electrode, a negative electrode, and a separator, and the separator is disposed between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell 20, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0075] In some embodiments, at least one electrode terminal 23 is disposed on the housing 21, and the electrode terminal 23 is electrically connected to the tab of the electrode assembly 22. The electrode terminal 23 may be directly connected to the tab, or may be indirectly connected to the tab through a current collecting member.

[0076] The electrode terminal 23 can be used to electrically connect to the electrode assembly 22 to output or input the electrical energy of the battery cell 20. The electrode terminal 23 can be electrically connected to the electrode assembly 22 by connecting to the tab. The tab electrically connected to the electrode terminal 23 can be a positive tab or a negative tab.

[0077] In some embodiments, a pressure relief mechanism 24 is disposed on the housing 21 . The pressure relief mechanism 24 is used to discharge the internal gas of the battery cell 20 .

[0078] As an example, the battery cell 20 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery.

[0079] See also Figure 4 In some embodiments, the battery device 1 may be a battery pack, which includes a box 10 and one or more battery cell assemblies 4 , wherein the battery cell assemblies 4 are accommodated in the box 10 .

[0080] As an example, the battery cell assembly 4 may be a battery module, and the battery cell assembly 4 may be accommodated in the box body 10 by fixing the battery module in the box body 10 .

[0081] As an example, the battery cell assembly 4 may also be accommodated in the case 10 by directly fixing the plurality of battery cells 20 to the case 10 .

[0082] As an example, the box 10 may include a first box 110 and a second box 120. The first box 110 and the second box 120 are buckled together to form a receiving chamber 101, so that a closed space is formed inside the box 10 to accommodate the battery cell assembly 4. The closed here means covered or closed, which can be sealed or unsealed.

[0083] Optionally, the first box body 110 and the second box body 120 may both be configured as a cylindrical structure with an opening, or one of the first box body 110 and the second box body 120 may also be configured as a plate-like structure, and the other may be configured as a cylindrical structure with an opening.

[0084] Exemplarily, the first box body 110 is a plate-like structure, the second box body 120 is a cylindrical structure, the first box body 110 and the second box body 120 are buckled together in the height direction to form the accommodating cavity 101, and the first box body 110 is located on the top of the second box body 120.

[0085] As an example, the box body 10 may further include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body 10 to accommodate the battery cell assembly 4.

[0086] In some embodiments, the box 10 may be a part of the chassis structure of the vehicle 100. For example, part of the box 10 may become at least a part of the floor of the vehicle 100, or part of the box 10 may become at least a part of the cross beam and longitudinal beam of the vehicle 100.

[0087] The box body 10 may be a simple three-dimensional structure such as a single cuboid or a cylinder, or may be a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids or cylinders, which is not limited in the embodiments of the present application.

[0088] Specifically, the box body 10 can be a metal shell made of alloy steel, alloy aluminum, etc., or a composite material shell made of metal and polypropylene, etc.

[0089] See also Figure 4According to an embodiment of the present application, a battery device 1 is provided, comprising a housing 10, a battery cell 20 and a heating element 30. The housing 10 has a receiving cavity 101, and the housing 10 comprises a first wall 11. The battery cell 20 is disposed in the receiving cavity 101. The heating element 30 is disposed on the first wall 11 and connected to the battery cell 20. The heating element 30 is a heating wire, and the number of the heating elements 30 is multiple, and at least two heating elements 30 are distributed at intervals and connected in parallel to the power supply circuit.

[0090] The box body 10 is used to accommodate and protect the battery cells 20 and the heating element 30. The battery cells 20 can be placed in the accommodating cavity 101 enclosed by the box body 10, and the heating element 30 can be arranged on the first wall 11 of the box body 10. The first wall 11 can be any wall on the box body 10, and the specific position of the first wall 11 can be set according to the layout of the battery cells 20.

[0091] The heating element 30 is used to heat the battery cell 20 to meet the heating requirements of the battery cell 20 in a low temperature environment, so that the battery cell 20 can be heated to a preset temperature range in a low temperature environment, so that the battery cell 20 can operate under good temperature conditions, thereby improving the operating reliability and service life of the battery device 1.

[0092] The heating element 30 may be configured as a heating wire. It should be noted that the heating wire is an electric heating component that can convert electrical energy into thermal energy, that is, it can generate more heat under the premise of external power supply to meet the heating requirements of the battery cell 20.

[0093] "Connected in parallel to the power supply circuit" means that the parallel heating elements 30 can work independently and have the same voltage, and the total current of the parallel circuit is the sum of the currents of each parallel heating element 30. Therefore, the total current can be increased by increasing the number of parallel heating elements 30 to increase the heating power and achieve a better heating effect.

[0094] The battery device 1 provided in some embodiments of the present application can increase the temperature of the battery cell 20 to a preset range by providing a heating element 30 for heating the battery cell 20 on the first wall 11 to ensure the safe operation of the battery cell 20, and by setting the number of the heating elements 30 to be multiple and at least two heating elements 30 to be arranged in parallel, the current can be diverted between the heating elements 30, so that the current density is reduced, thereby reducing the resistance and improving the heat conversion efficiency, so that the heating efficiency can be improved under the same power, the heating time can be shortened, and a better heating effect can be achieved, so that the temperature of the battery cell can be increased faster, which is beneficial to improving the performance of the battery device. In addition, the service life of the heating element 30 is related to the current density received. The smaller the current density, the longer the service life of the heating element 30. Therefore, the parallel arrangement of the heating elements 30 can also extend the service life.

[0095] Furthermore, the parallel arrangement of the heating elements 30 can also reduce energy waste, lower energy costs, and facilitate maintenance. When one of the heating elements 30 arranged in parallel is damaged, the other heating elements 30 can still continue to work without affecting the other heating elements 30. Therefore, there is no need to shut down the entire circuit during maintenance.

[0096] The battery device 1 provided in some embodiments of the present application may be provided with two, three or even more heating elements 30, wherein all the heating elements 30 may be arranged in parallel and distributed at intervals, or a part of the heating elements 30 may be arranged in parallel and distributed at intervals.

[0097] Exemplarily, the battery device 1 includes two heating elements 30 , and the two heating elements 30 are spaced apart and arranged in parallel.

[0098] In some embodiments, the heating wire may include a metal wire structure, including but not limited to any one of iron-chromium-aluminum alloy, nickel-chromium alloy, copper-nickel alloy and stainless steel, etc. The heating wire may also include a non-metallic structure, such as carbon fiber.

[0099] The heating wire occupies a small area and is easy to change its shape, so that it can be set at any position of the first wall 11 according to needs. It is easy to obtain, flexible to use, and conducive to reducing costs.

[0100] The heating element 30 also includes an insulating layer covering the heating wire, which can prevent the risk of the current of the heating wire being transferred to the box 10 or the battery cell 20, thereby reducing the probability of leakage of the battery device 1 and thus improving the reliability of the battery device 1 during use.

[0101] Optionally, the heating element 30 may also be configured as a heating plate, a heating film or a heating strip.

[0102] Please refer to 5 to Figure 8 In some embodiments, the heating element 30 is a strip-shaped structure and is bent on the first wall 11 .

[0103] "Bent arrangement" means that the heating element 30 can have multiple extension directions, such as Figure 4 As shown, in the direction from the battery cell 20 to the first wall 11, that is, in the height direction X, the orthographic projection of the heating element 30 is arranged in a zigzag manner, that is, the heating element 30 has both a portion extending along the first direction Y and a portion extending along the second direction Z. Optionally, the heating element 30 can be a zigzag structure or an arc structure.

[0104] The first direction Y may be the length direction of the box 10, and the second direction Z may be the width direction of the box 10, or the first direction Y may be the width direction of the box 10, and the second direction Z may be the length direction of the box 10. Of course, the design of the heating element 30 is not limited to the above structure, and the heating element 30 may be bent in other directions.

[0105] The above arrangement is helpful to improve the flexibility of the layout of the heating element 30 , and can also make it more widely arranged on the first wall 11 , so that each battery cell 20 can be connected to a part of the heating element 30 .

[0106] Please continue reading Figure 4 In some optional embodiments, the first wall 11 is provided with a groove 111 communicating with the accommodating cavity 101 , a plurality of heating elements 30 are respectively embedded in the groove 111 , and the battery cells 20 are respectively connected to the first wall 11 and the heating elements 30 .

[0107] The first wall 11 has a first surface 1001 disposed toward the accommodating cavity 101 . The first surface 1001 is provided with a notch connecting the groove 111 and the accommodating cavity 101 . The battery cell 20 is connected to the first surface 1001 .

[0108] By embedding the heating element 30 in the groove 111, the contact area between the heating element 30 and the first wall 11 can be increased, thereby improving the heating effect of the heating element 30 on the first wall 11. The temperature of the first wall 11 can be transferred to other walls of the box body 10, and the heat of the first wall 11 and other walls can be transferred to nearby battery cells 20 to heat up the battery cells 20.

[0109] The battery cell 20 can be connected to the heating element 30 and the first wall 11 by bonding with an adhesive, or, of course, by a direct contact abutment connection. Regardless of which connection method is used, since the heating element 30 can be embedded in the groove 111 of the first wall 11, after the battery cell 20 and the box body 10 are assembled, the battery cell 20 can be closer to the first wall 11, or the battery cell 20 can be in direct contact with the first wall 11. During the operation of the battery device 1, the risk of shaking or displacement of the battery cell 20 can be reduced.

[0110] In the related art, a heating element is arranged between the battery cell and the casing, so that a heating element is spaced between the battery cell and a part of the casing, while a certain distance is spaced between the battery cell and another part of the casing. This will cause an unstable connection between the battery cell and the casing, and may easily lead to risks such as shaking or displacement of the battery cell due to connection failure.

[0111] However, the embodiment of the present application is different from this. In the embodiment of the present application, the heating element 30 is embedded in a groove 111 provided on the first wall 11 of the box body 10 to be integrated with the box body 10. This arrangement can shorten the vertical distance between the battery cell 20 and the first wall 11, so that the battery cell 20 and the first wall 11 are connected more closely, which is beneficial to reduce the possibility of shaking or displacement of the battery cell 20, thereby helping to improve the reliability and service life of the battery device 1.

[0112] Moreover, in the embodiment of the present application, since the heating element 30 is integrated into the box body 10, the connection between the heating element 30 and the first wall 11 can be more stably achieved, which is beneficial to reduce the risk of shaking or displacement of the heating element 30, so that it can better play a heating role. In addition, through the above-mentioned arrangement, the heating element 30 can also improve the thermal conductivity effect of the box body 10, and the box body 10 can transfer heat to the battery cell 20, which is beneficial to improve the heating efficiency of the heating element 30 on the battery cell 20.

[0113] In summary, the battery device 1 provided in some embodiments of the present application can reduce the risk of shaking or displacement of the heating element 30 and the battery cell 20 at the same time by embedding the heating element 30 into the groove 111 provided on the first wall 11 of the box body 10, so that the connection between the box body 10, the battery cell 20 and the heating element 30 is tighter and more stable, thereby helping to improve the structural strength of the battery device 1, and then helping to improve the reliability of the battery device 1.

[0114] It should be noted that the heating element 30 can be fully embedded in the groove 111, or partially embedded in the groove 111, and the other part extends into the accommodating cavity 101 to connect with the battery cell 20. In addition, the number of the heating element 30 can be one, two, or even more.

[0115] The groove 111 can be configured as a strip structure to accommodate the heating wire.

[0116] In some embodiments, there are multiple grooves 111 , and the grooves 111 and the heating elements 30 are arranged one to one.

[0117] The number of heating elements 30 is the same as that of grooves 111 , and one heating element 30 is embedded in one groove 111 . The layout is reasonable, which facilitates the positioning and assembly of the heating elements 30 , and can also prevent interference between adjacent heating elements 30 , thereby improving reliability.

[0118] Exemplarily, two heating elements 30 and grooves 111 are each provided, and both the heating element 30 and the grooves 111 are strip-shaped structures and are arranged in a curved manner. By arranging in this manner, the grooves 111 and the heating element 30 can be arranged more evenly on the first wall 11, which can ensure the uniformity of force at various positions of the first wall 11 and the uniformity of heating the battery cells 20 by the heating element 30.

[0119] In some optional embodiments, the battery device 1 further includes a first adhesive layer, which is disposed between the battery cell 20 and the first wall 11 , and the battery cell 20 is respectively bonded to the first wall 11 and the heating element 30 through the first adhesive layer.

[0120] The first adhesive layer is used to bond the battery cell 20 to the heating element 30 and the box body 10 . The first adhesive layer can be made of a material with adhesive properties. The first adhesive layer can also be made of a material with thermal conductivity, which helps to improve the thermal conductivity of the heating element 30 to the battery cell 20 .

[0121] By bonding the heating element 30 to the battery cell 20 , the stability of the connection between the two can be ensured, which is beneficial to improving the heating effect of the heating element 30 on the battery cell 20 .

[0122] The first adhesive layer can cover the first wall 11 and the heating element 30, so that the notch of the groove 111 located on the first surface 1001 of the first wall 11 facing the accommodating cavity 101 is no longer exposed, which is conducive to protecting the heating element 30 disposed in the groove 111 and improving the reliability of the heating element 30. In addition, the first adhesive layer also has the function of flattening the first surface 1001, which is conducive to reducing the difficulty of installing the battery cell 20 in the accommodating cavity 101 and can also make the battery cell 20 more stable.

[0123] The provision of the first adhesive layer can not only ensure stable connection between the battery cell 20, the heating element 30 and the first wall 11, but also reduce the risk of collision between the heating element 30 and the battery cell 20 and the first wall 11 due to direct contact, thereby improving the reliability of the structure.

[0124] In the related art, a layer of glue is provided on the surface of the box body facing the battery cell to adhere the heating element to the surface of the box body, and then another layer of glue is provided on the surface of the heating element and the surface of the box body not covered with the heating element to adhere the battery cell to the heating element and the surface of the box body not covered with the heating element. This will cause the battery cell and the box body to be far apart, and the glue layer between the two is thicker, which makes the battery cell prone to the risk of debonding.

[0125] However, the embodiment of the present application is different from this. In the embodiment of the present application, the heating element 30 is embedded in the groove 111 provided on the first wall 11 of the box body 10 to be integrated with the box body 10. This arrangement can shorten the vertical distance between the battery cell 20 and the first wall 11 to reduce the thickness of the first adhesive layer used to bond the two, and can also provide only one first adhesive layer between the battery cell 20 and the first wall 11, thereby making the battery cell 20 and the first wall 11 more tightly connected, which is beneficial to reducing the risk of debonding, thereby helping to improve the reliability and service life of the battery device 1.

[0126] In summary, in the battery device 1 provided in some embodiments of the present application, the battery cell 20 can be respectively bonded to the first wall 11 and the heating element 30 through a first adhesive layer, so that the battery cell 20 is more tightly connected to the first wall 11, which is beneficial to improve the connection strength between the battery cell 20 and the first wall 11, thereby helping to improve the structural strength of the battery device 1, and further helping to improve the reliability of the battery device 1.

[0127] In some optional embodiments, the battery device 1 further includes a second adhesive layer, which is disposed between the heating element 30 and the groove 111 , and the heating element 30 is bonded to the first wall 11 via the second adhesive layer.

[0128] The second adhesive layer can fill the gap between the heating element 30 and the groove 111 to make the connection between the two more stable and prevent the heating element 30 from shaking or shifting, which is beneficial to improving the reliability of the battery device 1. In addition, the second adhesive layer can also separate the heating element 30 and the first wall 11, which is beneficial to reducing the risk of collision between the two due to direct contact, and is beneficial to improving the reliability of the two structures.

[0129] The second adhesive layer is used to bond the heating element 30 to the first wall 11 . The second adhesive layer can be made of a material with adhesive properties. The second adhesive layer can also be made of a material with thermal conductivity, which helps to improve the thermal conductivity of the heating element 30 to the first wall 11 .

[0130] In some optional embodiments, at least one of the first adhesive layer and the second adhesive layer includes any one of a thermal conductive adhesive layer, a thermal conductive potting adhesive layer and a silicone layer.

[0131] Thermally conductive adhesive consists of three parts: thermally conductive filler, base material and adhesive. The thermally conductive filler (such as metal powder, carbon black, aluminum oxide, etc.) is used to increase thermal conductivity, the base material (such as epoxy resin, silicone, etc.) plays the role of bonding and transferring thermal conductivity, and the adhesive (such as epoxy resin, acrylic acid, etc.) bonds the thermally conductive filler and the base material together to form thermally conductive adhesive. Optionally, the thermally conductive adhesive may include but is not limited to any one of epoxy resin thermally conductive adhesive and silicone thermally conductive adhesive.

[0132] The thermally conductive potting glue is made by filling a thermally conductive filler in a polymer material matrix, which can provide good thermal conductivity and bonding performance. Optionally, the thermally conductive potting glue can include but is not limited to any one of epoxy resin glue and silicone rubber.

[0133] Silicone glue is a highly elastic, high temperature resistant and chemical corrosion resistant glue. It can not only be used for packaging and fixing, but also can be used as a thermal conductive glue. It also has excellent electrical insulation and aging resistance.

[0134] The battery device 1 provided in some embodiments of the present application, by setting the first adhesive layer and / or the second adhesive layer as any of the above adhesive structures with heat-conducting function, can make the first adhesive layer and / or the second adhesive layer not only play a bonding role, but also play a heat-conducting role, which is beneficial to improve the thermal conductivity of the heating element 30 to the battery cell 20 and / or the first wall 11. In addition, since the first adhesive layer and / or the second adhesive layer have a certain thermal conductivity, they can also conduct the heat generated by the heating element 30 in time to reduce the risk of dry burning of the heating element 30, which is beneficial to improve the service life of the heating element 30, thereby helping to improve the service life of the battery device 1.

[0135] Exemplarily, the first adhesive layer and the second adhesive layer are both configured as thermally conductive adhesive layers.

[0136] In some embodiments, the first adhesive layer includes an insulating material to reduce the possibility that the current in the heating element 30 flows into the battery cell 20 , which helps to reduce the risk of leakage of the battery device 1 , thereby helping to improve the reliability of the battery device 1 .

[0137] In some embodiments, the second adhesive layer includes an insulating material to reduce the possibility of the current in the heating element 30 flowing into the box body 10 , which is beneficial to reduce the risk of leakage of the battery device 1 , thereby facilitating improving the reliability of the battery device 1 .

[0138] Optionally, the first adhesive layer and the second adhesive layer both include insulating materials. It should be noted that, since the first adhesive layer and the second adhesive layer both include insulating materials, the heating element 30 may be provided with an insulating layer to further improve the insulating performance. Of course, the insulating layer may also be removed.

[0139] In some embodiments, the groove 111 is a strip-shaped structure and is bent on the first wall 11 .

[0140] like Figure 4As shown, in the direction from the battery cell 20 to the first wall 11, that is, in the height direction X, the orthographic projection of the groove 111 is arranged in a winding manner, that is, the groove 111 has both a portion extending along the first direction Y and a portion extending along the second direction Z. Optionally, the groove 111 can be a folded line structure or an arc structure. Of course, the design form of the groove 111 is not limited to the above structure, and the groove 111 can also be arranged in a curved manner in other directions.

[0141] It can be understood that by setting the groove 111 as a strip structure and bending it, the width of the groove 111 can be reduced and its length can be increased, so that it can be set in a winding manner on the first wall 11. Compared with setting it as a rectangular or other shaped structure, the groove 111 with a strip structure can be evenly and flexibly set on the first wall 11, so that each position of the first wall 11 can have a part of the groove 111, so that the heating element 30 can be set at various positions of the first wall 11 to heat the battery cells evenly. In addition, the groove 111 with a strip structure can also effectively disperse and withstand external forces, which is beneficial to increase the structural stability of the first wall 11, and then help to improve the structural strength of the box body 10.

[0142] Optionally, one heating element 30 may be embedded in one groove 111 , or multiple heating elements 30 may be embedded therein, and the extending direction of the heating element 30 may be the same as the extending direction of the groove 111 , or may be different.

[0143] See also Figure 5 and Figure 7 , Figure 5 and Figure 7 They can be respectively represented as top views of the second box body 120, wherein the first wall 11 can be the bottom wall of the second box body 120. In some embodiments, the groove 111 includes a plurality of first groove sections 1111 extending along the first direction Y and spaced apart along the second direction Z, and a second groove section 1112 connected between two adjacent first groove sections 1111, and the first direction Y intersects with the second direction Z.

[0144] The groove 111 includes a plurality of first groove sections 1111, each of which extends along the first direction Y, and the plurality of first groove sections 1111 are spaced apart along the second direction Z, which can also be understood as being arranged side by side. Optionally, the first direction Y is perpendicular to the second direction Z, wherein the extension lengths of different first groove sections 1111 may be the same or different.

[0145] The second slot segment 1112 is used to connect two adjacent first slot segments 1111 so that the two adjacent first slot segments 1111 are connected to each other. The second slot segment 1112 can extend along the second direction Z. The second slot segment 1112 can also be configured as a broken line structure or an arc structure.

[0146] The battery device 1 provided in some embodiments of the present application is arranged in the above manner, so that the total extension length of the groove 111 on the first wall 11 can be increased, and the groove 111 is distributed more widely on the first wall 11, which is beneficial to increase the extension length of the heating element 30, and the heating element 30 is distributed more widely on the first wall 11, so as to improve the heating efficiency.

[0147] Optionally, the heating element 30 may be located in the first slot section 1111 and the second slot section 1112 at the same time, so that the heating element 30 may be continuous and complete.

[0148] like Figure 4 As shown, in some embodiments, a plurality of battery cells 20 are provided, the first wall 11 has a first surface 1001 disposed toward the accommodating cavity 101, the first surface 1001 is provided with a notch connecting the groove 111 and the accommodating cavity 101, and in the direction from the battery cell 20 to the first wall 11, the orthographic projections of each battery cell 20 overlap with the orthographic projections of the first surface 1001, and overlap with the orthographic projections of the heating element 30, respectively.

[0149] The number of the battery cells 20 may be two, three, or even more, and the plurality of battery cells 20 may be arranged side by side or in an array.

[0150] It can be understood that when the first wall 11 is the bottom wall of the second box body 120, the direction from the battery cell 20 to the first wall 11 is the height direction X, and when the first wall 11 is a side wall of the second box body 120, the direction from the battery cell 20 to the first wall 11 is the first direction Y or the second direction Z.

[0151] “The orthographic projections of each battery cell 20 overlap with the orthographic projections of the first surface 1001, and overlap with the orthographic projections of the heating element 30” can be understood as that each battery cell 20 can be connected to the first surface 1001 and can be connected to the heating element 30, which can ensure both the connection strength between the battery cell 20 and the first wall 11 and the uniformity of the connection between the battery cell 20 and the first wall 11 to reduce the risk of displacement of the battery cell 20, and can also ensure that the heating element 30 can heat each battery cell 20, which is beneficial to improve the uniformity of heating of each battery cell 20, thereby facilitating improving the performance of the battery device 1.

[0152] In some embodiments, the groove 111 may be formed by the first surface 1001 being recessed on the side facing away from the accommodating cavity 101. In this structure, the wall thickness of the position where the groove 111 is provided on the first wall 11 is smaller than the wall thickness of other positions.

[0153] It should be noted that there are many ways to form the groove 111 , and the groove 111 can be formed on the first wall 11 by a stamping process, a grooving process, or a cutting process.

[0154] In the related art, a heating film or a heating sheet is used to heat the battery cells, but the layout position of the heating film or the heating sheet is relatively concentrated, resulting in that the battery cells close to the heating film or the heating sheet can be heated and can only be connected to the heating film or the heating sheet, while the battery cells far away from the heating film or the heating sheet cannot be directly heated, and the heating efficiency is slow, resulting in uneven temperature of the battery cells in the battery device.

[0155] However, the embodiment of the present application is different from that. In the embodiment of the present application, each battery cell 20 can be connected to both the heating element 30 and the first wall 11 through the above-mentioned arrangement, which can not only ensure the heating requirements of each battery cell 20, but also improve the connection strength between each battery cell 20 and the first wall 11, and also ensure the uniformity of heating of all battery cells 20.

[0156] To achieve the above manner, the groove 111 can be set as a linear strip structure or a curved strip structure, and correspondingly, the heating element 30 can be set as a linear strip structure or a curved strip structure.

[0157] Please also read Figures 4 to 8 In some embodiments, the first wall 11 has a plurality of heating zones 112 , each heating zone 112 is connected to a battery cell 20 , and each heating zone 112 is respectively provided with a heating element 30 .

[0158] “The first wall 11 has multiple heating zones 112” can be understood as that the first wall 11 can be divided into multiple areas. In the embodiment of the present application, the first wall 11 can be equally divided into two heating zones 112. Of course, the first wall 11 can also be divided into more heating zones 112, wherein the area of ​​each heating zone 112 can be the same or different.

[0159] like Figure 5 and Figure 6 As shown, each heating zone 112 is respectively provided with a heating element 30, so that each heating element 30 can only heat the battery cell 20 located in the heating zone 112 corresponding to it, and all the heating elements 30 are arranged in parallel. Heating elements 30 with different resistances can be arranged according to the heating requirements of the battery cells 20 in different heating zones 112, so as to meet the differentiated heating requirements of the battery device 1 and improve the flexibility of use.

[0160] like Figure 5As shown, in some embodiments, the number of heating zones 112 and the number of heating elements 30 are respectively two, and there is an intersection line 1121 between the two heating zones 112 , and the two heating elements 30 are arranged in mirror symmetry with respect to the intersection line 1121 .

[0161] The “intersection line 1121” may be understood as the intersection portion between the two heating zones 112 , and the heating element 30 in one of the heating zones 112 and the heating element 30 in the other heating zone 112 are symmetrically arranged with the intersection line 1121 as the axis of symmetry.

[0162] The battery device 1 provided in some embodiments of the present application is arranged in the above manner, which is convenient for processing and forming the groove 111 on the first wall 11, and is also convenient for assembling and laying out the heating element 30, so that the first end 31 and the second end 32 of two adjacent heating elements 30 can be arranged adjacent to each other, so as to facilitate assembly with the shunt component 40.

[0163] Please also read Figures 4 to 8 In some embodiments, the first wall 11 has a plurality of heating zones 112 , each heating zone 112 is connected to a battery cell 20 , and in the direction from the battery cell 20 to the first wall 11 , the orthographic projection of each heating element 30 overlaps with the orthographic projection of each heating zone 112 .

[0164] By configuring in the above manner, each heating element 30 can heat the battery cells 20 located in each heating zone 112 to prevent the problem of local heating failure of the battery device 1 when a certain heating element 30 fails, thereby improving the reliability of the battery device 1.

[0165] like Figure 8 As shown, in some embodiments, there are two heating elements 30, and one of the two heating elements 30 is disposed around the other.

[0166] The battery device 1 provided in some embodiments of the present application is arranged in the above manner, which is convenient for processing and forming the groove 111 on the first wall 11, and is also convenient for assembling and laying out the heating element 30, so that the first end 31 and the second end 32 of two adjacent heating elements 30 can be arranged adjacent to each other, so as to facilitate assembly with the shunt component 40.

[0167] Specifically, the bending tracks of the at least two heating elements 30 are the same, and any one of the at least two heating elements 30 is disposed around any other one.

[0168] In some embodiments, the box 10 includes a first box 110 and a second box 120 connected along its own height direction X, the first box 110 and the second box 120 enclose a receiving cavity 101, and the second box 120 includes a first wall 11 spaced apart from the first box 110 along the height direction X.

[0169] The first wall 11 may be a wall away from the electrical devices on the battery cell 20 to prevent interference between the two or prevent safety issues from occurring.

[0170] By setting the first wall 11 as a wall separating the second box body 120 from the first box body 110 along the height direction X, that is, setting the first wall 11 as the wall with the lowest height position of the box body 10, the heating element 30 can be located at the bottom of all the battery cells 20, so that the heating element 30 will not interfere with the electrical components on the battery cells 20, and can transfer heat to each battery cell 20, which is beneficial to improve the thermal conductivity efficiency and the layout is reasonable. In addition, the first wall 11 can also support the battery cells 20, making them more tightly connected. In addition, it can also reduce costs and reduce the position of the groove 111 on the box body 10.

[0171] like Figure 6 and Figure 8 As shown, in some embodiments, the battery device 1 also includes a plurality of shunt components 40, the heating element 30 has a first end 31 and a second end 32 opposite to its own extension direction, at least two first ends 31 of the heating elements 30 are electrically connected to any one of the shunt components 40, and at least two second ends 32 of the heating elements 30 are electrically connected to any other one of the shunt components 40.

[0172] As an example, the shunt component 40 connected to the first end 31 can transfer and distribute the current passing through itself to the heating elements 30 arranged in parallel, and the shunt component 40 connected to the second end 32 can transfer the current of the heating elements 30 arranged in parallel to the wire or the power supply to form a parallel circuit, or the shunt component 40 connected to the second end 32 can transfer and distribute the current passing through itself to the heating elements 30 arranged in parallel, and the shunt component 40 connected to the first end 31 can transfer the current of the heating elements 30 arranged in parallel to the wire or the power supply.

[0173] The shunt component 40 can be electrically connected to the wire or other electrical connector to ensure that current passes through the heating element 30 to achieve heating. The battery device 1 provided in some embodiments of the present application is beneficial to ensuring the effectiveness of the parallel setting of the heating element 30 by providing the shunt component 40, and can also reasonably distribute the current to each heating element 30 to ensure that each heating element 30 is not subjected to excessive current shock, so as to extend the service life of the heating element 30.

[0174] In a second aspect, the present application provides an electrical device, comprising a battery device 1 provided in any of the above embodiments, and the battery device 1 is used to store or provide electrical energy.

[0175] It should be noted that the electrical equipment provided in the embodiments of the present application has the beneficial effects of the battery device 1 in any of the above embodiments.

[0176] Please also read Figures 5 to 8 According to some embodiments of the present application, a battery device 1 is provided, which includes a box body 10, a plurality of battery cells 20, two heating elements 30, a first adhesive layer, two shunt components 40 and a second adhesive layer.

[0177] The box body 10 includes a first box body 110 and a second box body 120 connected along its own height direction X, the first box body 110 and the second box body 120 enclose a receiving cavity 101, the second box body 120 includes a first wall 11 spaced apart from the first box body 110 along the height direction X, and the first wall 11 is provided with two grooves 111 communicating with the receiving cavity 101. The groove 111 is a strip structure, and the groove 111 includes a plurality of first groove sections 1111 extending along the first direction Y and spaced apart along the second direction Z, and a second groove section 1112 connected between two adjacent first groove sections 1111, and the first direction Y, the second direction Z and the height direction X intersect each other.

[0178] The heating element 30 is arranged one-to-one with the groove 111 and is completely embedded in the groove 111. The heating element 30 is a strip structure and is bent. The heating element 30 is a heating wire. The two heating elements 30 are distributed at intervals and connected in parallel to the power supply circuit. The heating element 30 has a first end 31 and a second end 32 opposite to its own extension direction. The first ends 31 of the two heating elements 30 are electrically connected to one of the shunt components 40, and the second ends 32 of the two heating elements 30 are electrically connected to the other shunt component 40.

[0179] The battery cell 20 is disposed in the accommodating cavity 101, and the first adhesive layer is disposed between the battery cell 20 and the first wall 11, and the battery cell 20 is respectively bonded to the first wall 11 and the heating element 30 through the first adhesive layer. The second adhesive layer is disposed between the heating element 30 and the groove 111, and the heating element 30 is bonded to the first wall 11 through the second adhesive layer, and both the first adhesive layer and the second adhesive layer are thermally conductive adhesive layers.

[0180] The first wall 11 has a first surface 1001 disposed toward the accommodating cavity 101, and the first surface 1001 is provided with a notch connecting the groove 111 and the accommodating cavity 101. In the height direction X, the orthographic projections of each battery cell 20 overlap with the orthographic projections of the first surface 1001, and overlap with the orthographic projections of the heating element 30. The first wall 11 has two heating areas 112, each of which is bonded with a battery cell 20, and each of which is provided with a heating element 30, or, in the height direction X, the orthographic projections of each heating element 30 overlap with the orthographic projections of each heating area 112.

[0181] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0182] 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 it. 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 make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery device, characterized in that: include: A box body having a containing cavity, wherein the box body comprises a first wall; A battery cell, disposed in the accommodation cavity; A heating element is arranged on the first wall and connected to the battery cell. The heating element is a heating wire. There are multiple heating elements, and at least two of them are spaced apart and connected in parallel to the power supply circuit.

2. The battery device according to claim 1, characterized in that: The heating element is a strip-shaped structure and is bent and arranged on the first wall.

3. The battery device according to claim 1 or 2, characterized in that: The first wall is provided with a groove communicating with the accommodating cavity, a plurality of the heating elements are respectively embedded in the groove, and the battery cells are respectively connected to the heating elements and the first wall.

4. The battery device according to claim 3, characterized in that: There are multiple grooves, and the grooves are arranged one-to-one with the heating elements.

5. The battery device according to claim 3, characterized in that: The battery device further includes a first adhesive layer, which is disposed between the battery cell and the first wall. The battery cell is respectively bonded to the first wall and the heating element through the first adhesive layer.

6. The battery device according to claim 5, characterized in that: The battery device further includes a second adhesive layer, which is disposed between the heating element and the groove, and the heating element is bonded to the first wall via the second adhesive layer.

7. The battery device according to claim 6, characterized in that: At least one of the first adhesive layer and the second adhesive layer includes any one of a thermal conductive adhesive layer, a thermal conductive potting adhesive layer and a silicone rubber layer.

8. The battery device according to claim 3, characterized in that: The groove is a strip-shaped structure and is bent on the first wall.

9. The battery device according to claim 8, characterized in that: The groove includes a plurality of first groove sections extending along a first direction and spaced apart along a second direction, and a second groove section connected between two adjacent first groove sections, and the first direction intersects with the second direction.

10. The battery device according to claim 3, characterized in that: The battery cells are arranged in plurality, the first wall has a first surface arranged toward the accommodating cavity, the first surface is provided with a notch connecting the groove and the accommodating cavity, and in the direction from the battery cells to the first wall, the orthographic projections of each of the battery cells overlap with the orthographic projections of the first surface, and overlap with the orthographic projections of the heating element, respectively.

11. The battery device according to claim 3, characterized in that: The first wall has a plurality of heating zones, each of which is connected to the battery cell, and each of which is provided with a heating element.

12. The battery device according to claim 11, characterized in that: The number of the heating zones and the number of the heating elements are respectively two, and there is an intersection line between the two heating zones, and the two heating elements are arranged in mirror symmetry with respect to the intersection line.

13. The battery device according to claim 3, characterized in that: The first wall has a plurality of heating zones, each of which is connected to the battery cell, and in a direction from the battery cell to the first wall, an orthographic projection of each heating element overlaps with an orthographic projection of each heating zone.

14. The battery device according to claim 13, characterized in that: Any one of the at least two heating elements is disposed around any other one.

15. The battery device according to claim 1 or 2, characterized in that: The box body includes a first box body and a second box body connected along its height direction, the first box body and the second box body enclose the accommodating cavity, and the second box body includes the first wall spaced apart from the first box body along the height direction.

16. The battery device according to claim 1 or 2, characterized in that: The battery device also includes a plurality of shunt components, the heating element having a first end and a second end opposite to each other in its extension direction, the first ends of at least two of the heating elements being electrically connected to any one of the shunt components, and the second ends of at least two of the heating elements being electrically connected to any other of the shunt components.

17. An electrical equipment, characterized in that: The invention comprises a battery device according to any one of claims 1 to 16, wherein the battery device is used to store or provide electrical energy.

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