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 heating piece, an electric connecting piece and a crimping piece, the heating piece is connected to the peripheral surface of the electric connecting piece and is conductively connected with the electric connecting piece, the crimping piece comprises a crimping sleeve, and the crimping sleeve is arranged at the joint of the heating piece and the electric connecting piece in a sleeving manner so as to fix the heating piece and the electric connecting piece. Wherein one part of the heating piece located in the crimping sleeve abuts against the position between the crimping sleeve and the electric connecting piece, and the other part of the heating piece and at least one of the crimping sleeve and the electric connecting piece are arranged in a clearance mode. 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 phones, notebook computers, electric cars, electric vehicles, electric aircraft, electric ships, electric toy cars, electric toy ships, electric toy aircraft and electric tools.

[0003] In the development of battery technology, how to improve the service life of the battery device is a technical problem that needs 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 an outer shell and an electrode assembly arranged in the outer shell; a heating device, at least one of the box body and the outer shell is provided with the heating device, the heating device comprising a heating piece, an electrical connecting piece and a compression connecting piece, the heating piece is connected to the outer peripheral surface of the electrical connecting piece and is in conductive connection with the electrical connecting piece, the compression connecting piece comprises a compression sleeve, the compression sleeve is sleeved at the connection between the heating piece and the electrical connecting piece to fix the heating piece and the electrical connecting piece; wherein a part of the heating piece located in the compression sleeve abuts between the compression sleeve and the electrical connecting piece, and another part is arranged in a gap with at least one of the compression sleeve and the electrical connecting piece.

[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, and by arranging a part of the heating piece located in the compression sleeve to abut between the compression sleeve and the electrical connecting piece, the stability of the electrical connection between the heating piece and the electrical connecting piece can be ensured, so that current can pass between them, thereby enabling the heating piece to achieve the heating effect, and by arranging another part of the heating piece located in the compression sleeve to be arranged in a gap with at least one of the compression sleeve and the electrical connecting piece, the deformation or damage problem of the heating piece caused by being pressed too tightly can be prevented, thereby improving the stability and service life of the heating piece, and further improving the reliability and service life of the battery device.

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

[0008] In some embodiments, the crimping sleeve has a first opening and a second opening opposite to each other, one of the first opening and the second opening is directed to the heating element, and the other is directed to the electrical connector, and the area of the first opening is larger than that of the second opening.

[0009] In the above scheme, the part of the crimping sleeve near the second opening can press the heating element to abut between the crimping sleeve and the electrical connector, and the part of the crimping sleeve near the first opening does not excessively press the heating element, which helps to prevent the heating element from being deformed or damaged.

[0010] In some embodiments, in the direction from the first opening to the second opening, the cross-sectional size of the crimping sleeve gradually decreases. By setting the crimping sleeve in the above structure, the effective connection between the heating element and the electrical connector can be ensured, and the deformation or damage of the heating element can be effectively prevented.

[0011] In some embodiments, in the direction from the electrical connector to the heating element, the cross-sectional size of the electrical connector in the crimping sleeve decreases, or the cross-sectional size of the electrical connector in the crimping sleeve increases. By setting the electrical connector in the above structure, the effective connection between the heating element and the electrical connector can be ensured, and the deformation or damage of the heating element can be effectively prevented.

[0012] In some embodiments, the outer periphery of the electrical connector is recessed inward to form a groove, and the heating element is embedded in the groove. By setting in this way, the contact area between the electrical connector and the heating element can be increased, and the connection strength and electrical performance of the two can be improved.

[0013] In some embodiments, in the direction from the electrical connector to the heating element, the groove has a spiral structure, and the heating element is wound around the electrical connector. By setting in this way, the heating element can have better heat conduction capacity, and the contact area between the heating element and the electrical connector can be increased, which is conducive to improving the connection stability.

[0014] In some embodiments, the heating device further comprises a protective layer, which is arranged between the crimping sleeve and the heating element. By setting the protective layer, the crimping sleeve can be prevented from directly acting on the heating element to crush it, which is conducive to improving the service life of the heating element and thus improving the reliability and service life of the battery device.

[0015] In some embodiments, the heating device further comprises a protective sleeve, a part of the heating element is arranged in the protective sleeve, and the other part of the heating element extends out of the protective sleeve and is connected with the electrical connector. In the above scheme, the protective sleeve is used to protect the heating element, which is conducive to improving the reliability and service life of the battery device.

[0016] In some embodiments, the crimping member further comprises an adapter connected to the crimping sleeve and the protective sleeve. The adapter can tightly combine the crimping sleeve and the protective sleeve together to prevent the crimping member from falling off, thereby improving the reliability of the battery device.

[0017] In some embodiments, the adapter has a first part and a second part, the first part is sleeved on the outer circumferential surface of the protective sleeve, and the second part is connected between one end of the first part facing the crimping sleeve and one end of the crimping sleeve facing the first part. In this way, the material of the crimping member can be reduced, thereby reducing the cost.

[0018] In some embodiments, the first part has a first end portion, a body and a second end portion connected in sequence along the circumferential direction of the first part, and the first end portion and the second end portion have a gap along the circumferential direction. In this way, the assembly between the first part of the adapter and the protective sleeve is facilitated.

[0019] In some embodiments, in the direction of the first end portion from the body, the size of the first end portion in the direction from the first part to the crimping sleeve decreases, and / or in the direction of the second end portion from the body, the size of the second end portion in the direction from the first part to the crimping sleeve decreases. In this way, the material of the crimping member can be reduced, thereby reducing the cost.

[0020] In a second aspect, the present application further provides a power consumption device comprising the battery device according to any one of the embodiments of the first aspect, and the battery device is used to store or provide electric energy.

[0021] In a third aspect, the present application further provides a heating device comprising: a heating member; an electrical connecting member, the heating member is connected to the outer circumferential surface of the electrical connecting member and is in conductive connection with the electrical connecting member; a crimping member connected to the outer circumferential surface of the electrical connecting member and in conductive connection with the electrical connecting member, the crimping member comprises a crimping sleeve, the crimping sleeve is sleeved on the connection between the heating member and the electrical connecting member to fix the heating member and the electrical connecting member; wherein a part of the heating member located in the crimping sleeve abuts between the crimping sleeve and the electrical connecting member, and another part is arranged with a gap from at least one of the crimping sleeve and the electrical connecting member.

[0022] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the following specific 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, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0023] 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 on the basis of the drawings without creative labor.

[0024] Figure 1 The structural schematic diagram of a vehicle provided for some embodiments of the present application is shown in the figure.

[0025] Figure 2 The exploded structural schematic diagram of a battery device provided for some embodiments of the present application is shown in the figure.

[0026] Figure 3 The exploded structural schematic diagram of a battery monomer provided for some embodiments of the present application is shown in the figure.

[0027] Figure 4 The structural schematic diagram of a heating device provided for some embodiments of the present application is shown in the figure.

[0028] Figure 5 The exploded structural schematic diagram of a heating device provided for some embodiments of the present application is shown in the figure.

[0029] Figure 6 The structural schematic diagram of a crimping piece in a heating device provided for some embodiments of the present application is shown in the figure.

[0030] Figure 7 The exploded structural schematic diagram of a heating device provided for some other embodiments of the present application is shown in the figure.

[0031] Figure 8 The exploded structural schematic diagram of a heating device provided for some other embodiments of the present application is shown in the figure.

[0032] The specific implementation drawings are as follows:

[0033] 1000, vehicle; 1, battery device; 2, controller; 3, motor; 4, battery monomer assembly;

[0034] 100, battery monomer; 110, shell; 1101, end cover; 1102, shell body; 120, electrode assembly; 130, electrode terminal; 140, pressure relief mechanism; 200, box body; 210, first box body; 220, second box body;

[0035] 10, heating device; 11, heating element; 12, electrical connector; 121, groove; 13, crimping element; 131, crimping sleeve; 1311, first opening; 1312, second opening; 132, adapter; 1321, first portion; 13211, first end portion; 13212, body; 13213, second end portion; 13214, gap; 1322, second portion; 14, protective sleeve; 15, support body. DETAILED DESCRIPTION

[0036] 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 but not all of 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 protection scope of the present application.

[0037] 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 specification of the present application are only for the purpose of describing the specific embodiments 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, not to describe a particular order or primary and secondary relationship.

[0038] 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 phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive or alternative to other embodiments.

[0039] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect", "attach" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] The term “and / or” in the present application is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character “ / ” in the present application generally represents an “or” relationship between the front and rear associated objects.

[0041] In the embodiments of the present application, the same reference signs represent the same components, and for the sake of brevity, the detailed description of the same components is 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 and should not constitute any limitation on the present application.

[0042] “Multiple” appearing in the present application means two or more (including two).

[0043] At present, from the development of market situation, the application of battery device is more and more widely. 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] To solve the above technical problems, the battery device provided in the application comprises a box, a battery monomer and a heating device. The battery monomer is arranged in the box, and the battery monomer comprises a shell and an electrode assembly arranged in the shell. At least one of the box and the shell is provided with the heating device, and the heating device comprises a heating piece, an electrical connecting piece and a pressure connecting piece. The heating piece is connected to the outer circumferential surface of the electrical connecting piece and is in conductive connection with the electrical connecting piece. The pressure connecting piece comprises a pressure connecting sleeve, and the pressure connecting sleeve is sleeved on the connection between the heating piece and the electrical connecting piece to fix the heating piece and the electrical connecting piece. Wherein, a part of the heating piece in the pressure connecting sleeve abuts between the pressure connecting sleeve and the electrical connecting piece, and the other part is arranged in a gap with at least one of the pressure connecting sleeve and the electrical connecting piece

[0048] By arranging the heating device, the temperature requirement of the battery monomer during charging and discharging can be better met, the temperature of the battery monomer can be quickly raised to the preset temperature range, and the service life of the battery device can be improved.

[0049] The technical solutions described in the embodiments of the application are suitable for various electric equipment using the battery device, for example, mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, the spacecraft includes airplanes, rockets, space shuttles and spacecraft, etc.

[0050] It should be understood that the technical solutions described in the embodiments of the application are not only limited to the above described devices, but also can be applied to all devices using the battery device, but for the sake of brevity, the following embodiments are described by taking the electric vehicle as an example.

[0051] For example, as shown in Figure 1 , Figure 1 The structural schematic diagram of a vehicle 1000 in one embodiment of the application. The vehicle 1000 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The vehicle 1000 can be provided with a motor 3, a controller 2 and a battery device 1 inside. The controller 2 is used to control the battery device 1 to supply power to the motor 3. For example, the battery device 1 can be arranged at the bottom, the front or the rear of the vehicle 1000. The battery device 1 can be used for power supply of the vehicle 1000, for example, the battery device 1 can be used as an operating power source of the vehicle 1000, and is used for the circuit system of the vehicle 1000, for example, is used for the power demand of the vehicle 1000 during starting, navigation and running. In another embodiment of the application, the battery device 1 can not only be used as an operating power source of the vehicle 1000, but also can be used as a driving power source of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0052] Please refer to 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.

[0053] In some embodiments, the battery cell assembly 4 is generally formed by arranging a plurality of battery cells 100.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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 connected with the frame, so that an enclosed space is formed inside the box 200 to accommodate the battery cell assembly 4.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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 by a cable tie.

[0063] Referring to Figure 3 The battery cell 100 includes a housing 110, an electrode assembly 120, and an electrode terminal 130.

[0064] The housing 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 housing 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.

[0065] For example, the housing 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.

[0066] In some embodiments, the housing 110 can be a sealed structure, or can also be a non-sealed structure. As an example, when the housing 110 is a non-sealed structure, the housing 110 plays a role of protecting the electrode assembly 120, and a sealing bag is further included between the housing 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 housing 110 is a sealed structure, it is used to package the electrode assembly 120, the electrolyte, and other components.

[0067] In some embodiments, the housing 110 includes an end cover 1101 and a shell 1102, and the shell 1102 is provided with an opening, and the end cover 1101 is provided on the opening. The shell 1102 can be provided with one or more openings. The end cover 1101 can also be provided with one or more openings.

[0068] The shape of the housing 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 housing can be selected; if the electrode assembly 120 is a cylindrical structure, a cylindrical housing can be selected.

[0069] The electrode assembly 120 is a component in which an electrochemical reaction occurs in the battery cell 100, and the housing 110 can contain one or more electrode assemblies 120.

[0070] In some embodiments, the electrode assembly 120 can have a cylindrical shape, a flat shape, or a multi-prism shape, etc. The electrode assembly 120 can have a winding structure, a stacking structure, or a hybrid structure of winding and stacking.

[0071] 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.

[0072] 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.

[0073] The electrode terminal 130 can be used to electrically connect with 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 connecting with the tab. The tab electrically connected to the electrode terminal 130 can be a positive electrode tab or a negative electrode tab.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] Please refer to Figure 2 to Figure 4The application provides a battery device 1, which comprises a box body 200, a battery monomer 100 and a heating device 10. The battery monomer 100 is arranged in the box body 200, and the battery monomer 100 comprises an outer shell 110 and an electrode assembly 120 arranged in the outer shell. At least one of the box body 200 and the outer shell 110 is provided with the heating device 10, and the heating device 10 comprises a heating piece 11, an electric connecting piece 12 and a press-fit piece 13. The heating piece 11 is connected to the outer peripheral surface of the electric connecting piece 12 and is electrically connected with the electric connecting piece 12. The press-fit piece 13 comprises a press-fit sleeve 131, and the press-fit sleeve 131 is sleeved on the connection position of the heating piece 11 and the electric connecting piece 12 to fix the heating piece 11 and the electric connecting piece 12. Wherein, a part of the heating piece 11 arranged in the press-fit sleeve 131 abuts between the press-fit sleeve 131 and the electric connecting piece 12, and the other part is arranged in a gap with at least one of the press-fit sleeve 131 and the electric connecting piece 12.

[0078] The heating device 10 is used for heating the battery monomer 100. Optionally, the heating piece can be an electric heating component, that is, an element capable of converting electric energy into heat energy. The heating piece 11 can be connected with an external power supply through the electric connecting piece 12 to realize the heating function.

[0079] The electrically conductive connection between the heating piece 11 and the electric connecting piece 12 can be understood as that the electric connecting piece 12 is used for transmitting electric energy to the heating piece 11 to make the heating piece 11 realize the heating function. The electric connecting piece 12 can be a conductive wire, which can include but is not limited to any one of a copper wire, an aluminum wire, a nichrome wire and the like.

[0080] The press-fit piece 13 is used for fixing the connection position of the heating piece 11 and the electric connecting piece 12 to ensure that the stable current passes between the two, thereby realizing the heating function of the heating device 10.

[0081] The battery device 1 provided by some embodiments of the application can better meet the temperature requirement of the charging and discharging of the battery monomer 100 by arranging the heating device 10 with the heating function and being more reliable, so that the temperature of the battery monomer 100 is more quickly raised to the preset temperature range, thereby facilitating the improvement of the service life of the battery device 1.

[0082] The part of the heating element 11 located in the crimping sleeve 131 and abutting between the crimping sleeve 131 and the electrical connecting element 12 can be understood as that the part of the heating element 11 is interference fitted between the crimping sleeve 131 and the electrical connecting element 12, and when the connecting part of the heating element 11 and the electrical connecting element 12 is sleeved and fixed by the crimping sleeve 131, the part of the heating element 11 is tightly fitted between the crimping sleeve 131 and the electrical connecting element 12 by a certain pressure, so that the part of the heating element 11 is tightly contacted with the crimping sleeve 131 and the electrical connecting element 12, to ensure that the part of the heating element 11 will not be loose or shaken.

[0083] The other part of the heating element 11 located in the crimping sleeve 131 and abutting between the crimping sleeve 131 and the electrical connecting element 12 can be understood as that the part of the heating element 11 is interference fitted between the crimping sleeve 131 and the electrical connecting element 12, and when the connecting part of the heating element 11 and the electrical connecting element 12 is sleeved and fixed by the crimping sleeve 131, the part of the heating element 11 is tightly fitted between the crimping sleeve 131 and the electrical connecting element 12 by a certain pressure, so that the part of the heating element 11 is tightly contacted with the crimping sleeve 131 and the electrical connecting element 12, to ensure that the part of the heating element 11 will not be loose or shaken.

[0084] In summary, it can be understood that the part of the heating element 11 abutting between the crimping sleeve 131 and the electrical connecting element 12 is subjected to a greater pressure than the other part of the heating element 11 located in the crimping sleeve 131 and abutting between the crimping sleeve 131 and the electrical connecting element 12.

[0085] In the related art, the heating element 11 located in the crimping sleeve 131 is abuttingly arranged between the crimping sleeve 131 and the electrical connecting element 12, which is easy to cause the heating element 11 to be crushed and broken or fail.

[0086] However, in the embodiment of the present application, the part of the heating element 11 located in the crimping sleeve 131 is abuttingly arranged between the crimping sleeve 131 and the electrical connecting element 12, to ensure the stability of the electrical connection between the heating element 11 and the electrical connecting element 12, so that the current can pass between them, thereby enabling the heating element 11 to achieve the heating effect, and the other part of the heating element 11 located in the crimping sleeve 131 is gap arranged with at least one of the crimping sleeve 131 and the electrical connecting element 12, to prevent the heating element 11 from being deformed or damaged due to excessive compression, thereby improving the stability and service life of the heating element 11, and improving the reliability of the heating device 10, and further improving the reliability and service life of the battery device 1.

[0087] In addition, by gap setting the other part of the heating piece 11 located in the crimping sleeve 131 and at least one of the crimping sleeve 131 and the electrical connecting piece 12, it is also beneficial to facilitate assembly and improve assembly efficiency.

[0088] Optionally, the heating device 10 can be provided in a straight line structure, or in an arc structure, or in a broken line structure, and the shape of the heating device 10 can be set according to requirements.

[0089] In some embodiments, the box body 200 can be provided with the 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.

[0090] Optionally, the heating device 10 can be arranged on the first box body 210 or on the second box body 220.

[0091] The box body 200 can be provided with one heating device 10, two heating devices 10, or more heating devices 10, and the heating devices 10 can be arranged at positions with high heating requirements, which is beneficial to improve the heat conduction efficiency of the heating device 10 to the battery monomer 100, reduce costs, and improve flexible use.

[0092] In some embodiments, the shell 110 can also be provided with the 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.

[0093] In some embodiments, the box body 200 and the shell 110 can be respectively provided with the heating device 10.

[0094] Optionally, the heating piece 11 and the electrical connecting piece 12 can be respectively provided with an insulating layer except for the connected part, to prevent the risk of electrical connection with external components.

[0095] Optionally, the crimping sleeve 131 can be a whole ring structure, or can be provided in a ring structure with an intermittent structure.

[0096] In some optional embodiments, the heating piece 11 can be provided as a heating wire. The heating wire can include a metal wire structure, and the metal structure can include any one of iron-chromium-aluminum alloy, nickel-chromium alloy, copper-nickel alloy, and stainless steel, or the like, or can include a non-metal structure, such as carbon fiber.

[0097] The heating wire occupies a small area and is easy to change shape, so it can be arranged at any position of the shell 110 or the box 200 according to requirements, is convenient to obtain, and is conducive to reducing costs.

[0098] Optionally, the heating element 11 can also be a heating plate or a heating strip.

[0099] Please refer to Figure 4 to Figure 6 In some embodiments, the crimping sleeve 131 has a first opening 1311 and a second opening 1312 facing opposite directions, one of the first opening 1311 and the second opening 1312 faces the heating element 11, and the other faces the electrical connecting element 12, and the area of the first opening 1311 is larger than that of the second opening 1312.

[0100] To meet the effectiveness that a part of the heating element 11 located in the crimping sleeve 131 is arranged to abut between the crimping sleeve 131 and the electrical connecting element 12, and another part is arranged with a gap from at least one of the crimping sleeve 131 and the electrical connecting element 12, the crimping sleeve 131 can be arranged as described above, so that the part of the crimping sleeve 131 near the second opening 1312 can press the heating element 11 to make it abut between the crimping sleeve 131 and the electrical connecting element 12, and the part of the crimping sleeve 131 near the first opening 1311 will not excessively press the heating element 11, which helps to prevent the heating element 11 from being deformed or damaged.

[0101] As an example, the first opening 1311 faces the heating element 11, and the second opening 1312 faces the electrical connecting element 12.

[0102] The crimping sleeve 131 can be inserted into the extension direction of the electrical connecting element 12 or the extension direction of the heating element 11, and arranged in the above manner, so that in the process of contacting the heating element 11, the heating element 11 is pressed by the crimping sleeve 131 in a trend of first large and then small, or first small and then large, to prevent the heating element 11 from being in an over-pressing state all the time in the process of assembling the crimping sleeve 131, thereby effectively avoiding the risk of damage or fracture of the heating element 11 under pressure.

[0103] The crimping sleeve 131 can also be changed in shape by some process to be sleeved at the connection between the electrical connecting element 12 and the heating element 11, and arranged in the above manner, which can also prevent the heating element 11 from being in an over-pressing state all the time in the process of assembling the crimping sleeve 131, thereby effectively avoiding the risk of damage or fracture of the heating element 11 under pressure.

[0104] Please continue to refer to Figure 6 In some optional embodiments, in the direction from the first opening 1311 to the second opening 1312, the cross-sectional size of the crimping sleeve 131 gradually decreases.

[0105] It can be understood that the crimping sleeve 131 can be in a trumpet structure, and the part of the crimping sleeve 131 between the first opening 1311 and the second opening 1312 is a continuous arc surface structure.

[0106] By setting the cross-sectional size of the crimping sleeve 131 to gradually increase or gradually decrease, the crimping sleeve 131 can provide more uniform pressure to the heating element 11 during crimping, which helps to reduce damage to the heating element 11 caused by excessive total pressure provided by the crimping sleeve 131, and also helps to reduce the pulling force provided by the crimping sleeve 131 to the heating element 11 during crimping, thereby facilitating to ensure the performance of the heating element 11 and the reliability of the electrical connection between the heating element 11 and the electrical connector 12, and further facilitating to improve the reliability of the heating device.

[0107] Further, by setting the crimping sleeve 131 to the above structure, the crimping sleeve 131 can better resist deformation and looseness when subjected to external force or vibration, thereby facilitating to improve the stability of the heating element 11 and the electrical connection, and further facilitating to further improve the reliability of the heating device 10, in addition, it is also convenient for the processing and manufacturing of the crimping piece 13.

[0108] Of course, the crimping sleeve 131 can also be set to a stepped structure in the direction from the first opening 1311 to the second opening 1312.

[0109] Please refer to Figure 4 and Figure 7 In some embodiments, the cross-sectional size of the electrical connector 12 located in the crimping sleeve 131 tends to decrease in the direction from the electrical connector 12 to the heating element 11. Alternatively, in some embodiments, the cross-sectional size of the electrical connector 12 located in the crimping sleeve 131 tends to increase in the direction from the electrical connector 12 to the heating element 11.

[0110] In order to meet the effectiveness that part of the heating element 11 located in the crimping sleeve 131 is arranged to abut between the crimping sleeve 131 and the electrical connector 12, and the other part is arranged with a gap to at least one of the crimping sleeve 131 and the electrical connector 12, the part of the electrical connector 12 located in the crimping sleeve 131 can be set as the above structure, so that the part of the crimping sleeve 131 with larger cross-sectional size of the electrical connector 12 can press the heating element 11 to abut between the crimping sleeve 131 and the electrical connector 12, and the part of the crimping sleeve 131 with smaller cross-sectional size of the electrical connector 12 will not excessively press the heating element 11, which helps to prevent the heating element 11 from deforming or being damaged.

[0111] For example, the cross-sectional size of the electrical connector 12 located in the crimping sleeve 131 tends to gradually decrease in the direction from the electrical connector 12 to the heating element 11, or the cross-sectional size of the electrical connector 12 located in the crimping sleeve 131 tends to gradually increase.

[0112] Please refer to Figure 8 In some alternative embodiments, the outer circumferential surface of the electrical connector 12 is internally recessed to form a groove 121, and the heating element 11 is embedded in the groove 121.

[0113] The design of the groove 121 can better fix the heating element 11 to prevent the heating element 11 from shaking or shifting, which is conducive to improving the stability and reliability of the connection between the heating element 11 and the electrical connector 12. In addition, the embedded cooperation between the heating element 11 and the electrical connector 12 can also increase the contact area between them, thereby reducing the contact resistance and helping to reduce the energy loss and heating phenomenon during the transmission of the current between them, thereby improving the electrical transmission efficiency and enhancing the electrical performance, thereby improving the performance of the battery device 1.

[0114] In addition, since the heating element 11 can be embedded in the groove 121 to fix the position, it can also prevent the heating element 11 from accumulating during the crimping of the heating element 11 and the electrical connector 12, which is conducive to improving the uniformity of the distribution of the heating element 11.

[0115] From the direction of the electrical connector 12 pointing to the heating element 11, the groove 121 can be designed as a structure extending in this direction, and can also be designed as a spiral structure, and the specific shape can be designed according to the needs.

[0116] Please refer to Figure 5 and Figure 8 In some embodiments, from the direction of the electrical connector 12 pointing to the heating element 11, the groove 121 is in a spiral structure, and the heating element 11 is wound around the electrical connector 12.

[0117] The "heating element 11 wound around the electrical connector 12" can be understood as the part of the heating element 11 connected to the electrical connector 12 can be designed as a spiral structure to be wound around the electrical connector 12 and embedded in the groove 121 in a spiral structure.

[0118] By the above-mentioned manner, the contact area between the heating element 11 and the electrical connector 12 can be increased, thereby improving the conduction efficiency of the current, and the spiral winding manner can firmly fix the heating element 11 on the electrical connector 12 to prevent it from loosening or falling off during work. This structure can also disperse the thermal stress generated during heating, reduce the structural deformation and damage caused by thermal expansion and contraction, and in addition, the groove 121 in a spiral structure can make the heating element 11 wind more orderly and compactly on the electrical connector 12, which is convenient for installation and disassembly.

[0119] Optionally, the heating element 11 is provided in a spiral structure, which is convenient for adjusting the length and density of the heating element 11 according to actual needs to meet different heating requirements.

[0120] In some embodiments, the heating device 10 further comprises a protective layer, which is arranged between the crimping sleeve 131 and the heating element 11.

[0121] The protective layer can buffer the pressure provided by the crimping sleeve 131 to the heating element 11, so as to disperse part of the pressure, which is conducive to reducing the probability of damage to the heating element 11, thereby improving the service life of the battery device 1.

[0122] Optionally, the protective layer can include but is not limited to a layer of synthetic rubber or polyethylene material.

[0123] The battery device 1 provided by some embodiments of the present application can effectively avoid the crimping sleeve 131 directly acting on the heating element 11 to crush it, which is conducive to ensuring the reliability of the heating element 11 abutting between the crimping sleeve 131 and the electrical connecting element 12, improving the service life of the heating element 11, and thereby improving the reliability and service life of the battery device 1.

[0124] Please continue to refer to Figure 4 and Figure 5 In some embodiments, the heating device 10 further comprises a protective sleeve 14, a part of the heating element 11 is arranged in the protective sleeve 14, and another part of the heating element 11 extends out of the protective sleeve 14 and is connected with the electrical connecting element 12.

[0125] The protective sleeve 14 is used to provide protection and isolation for the heating element 11, so as to reduce damage or safety problems caused by direct contact of the heating element 11 with the external environment, and the protective sleeve 14 can also reduce heat loss to the outside, improve heating efficiency, and prevent oxidation or corrosion of the heating element 11.

[0126] The protective sleeve 14 can be connected with the box 200 and / or the shell 110, so that the heating device 10 can heat the battery monomer 100. The protective sleeve 14 can be made of insulating material to prevent the heating element 11 from being electrically connected with the box 200 or the shell 110, and the insulating material can include aluminum oxide, silicon oxide, etc. As an example, the protective sleeve 14 can be provided as a silica gel sleeve.

[0127] The heating element 11 is a core component of the heating device 10, part of which is located in the protective sleeve 14 to be protected, and the other part of which extends out of the protective sleeve 14 and is connected with the electrical connector 12, so that the heating element 11 can be conveniently connected to the circuit to obtain the required electrical energy for heating. It can be understood that the heating element 11 extending out of the protective sleeve 14 should be coated with an insulating material or wrapped or separated by other insulating materials to avoid electrical connection with external components and other safety problems.

[0128] In some embodiments, the heating device 10 further comprises a heat-conducting adhesive layer arranged between the heating element 11 and the protective sleeve 14, and the heating element 11 is bonded to the protective sleeve 14 through the heat-conducting adhesive to improve the heat-conducting capacity between the heating element 11 and the protective sleeve 14.

[0129] Please continue to refer to Figure 4 and Figure 5 In some embodiments, the crimping member 13 further comprises an adapter portion 132, and the crimping sleeve 131 and the protective sleeve 14 are connected through the adapter portion 132.

[0130] In order to enhance the stability and reliability of the connection of the crimping member 13, the crimping member 13 further comprises an adapter portion 132 connected between the crimping sleeve 131 and the protective sleeve 14, which not only tightly connects the crimping sleeve 131 and the protective sleeve 14 together, but also can withstand a certain tension and pressure, ensuring that the entire heating device 10 remains stable and reliable during long-term use.

[0131] Some embodiments of the battery device 1 provided by the present application set the adapter portion 132 to tightly combine the crimping sleeve 131 and the protective sleeve 14 together, so as to prevent the crimping member 13 from falling off, which is beneficial to improve the stability of the heating device 10, thereby improving the reliability of the battery device 1.

[0132] Please continue to refer to Figure 4 to Figure 6 In some embodiments, the adapter portion has a first portion 1321 and a second portion 1322, the first portion 1321 is sleeved on the outer circumferential surface of the protective sleeve 14, and the second portion 1322 is connected between one end of the first portion 1321 facing the crimping sleeve 131 and one end of the crimping sleeve 131 facing the first portion 1321.

[0133] The first part 1321 is sleeved on the outer circumferential surface of the protective sleeve 14 to connect with the protective sleeve 14. The first part 1321 can be crimped on the protective sleeve 14 or can be bonded to the protective sleeve 14. The second part 1322 is connected between the first part 1321 and the crimping sleeve 131. The second part 1322 can play a transition role. Since the radial dimension of the protective sleeve 14 is larger than the radial dimension of the heating element 11 and the electrical connecting element 12 after being connected, the above arrangement facilitates the assembly of the first part 1321 and the crimping sleeve 131, and can also reduce the overall material of the crimping element 13, thereby reducing the cost.

[0134] In some embodiments, the first part 1321 has a first end portion 13211, a body 13212 and a second end portion 13213 connected in sequence along the circumferential direction of the first part 1321. The first end portion 13211 and the second end portion 13213 have a gap 13214 along the circumferential direction.

[0135] The "first end portion 13211 and the second end portion 13213 have a gap 13214 along the circumferential direction" can be understood as that the first part 1321 has an annular structure with an intermittent design. The first end portion 13211 and the second end portion 13213 can play a positioning and fixing role. The above arrangement facilitates the assembly of the first part 1321 to the protective sleeve 14.

[0136] In some embodiments, in the direction of the body 13212 pointing to the first end portion 13211, the size of the first end portion 13211 in the direction of the first part 1321 pointing to the crimping sleeve shows a decreasing trend.

[0137] The above arrangement can reduce the material of the first end portion 13211, thereby reducing the cost.

[0138] In some embodiments, in the direction of the body 13212 pointing to the second end portion 13213, the size of the second end portion 13213 in the direction of the first part 1321 pointing to the crimping sleeve shows a decreasing trend.

[0139] The above arrangement can reduce the material of the second end portion 13213, thereby reducing the cost.

[0140] As shown in FIG. 1, Figure 8 In some alternative embodiments, the heating device 10 further comprises a support body 15 arranged in the protective sleeve 14. The heating element 11 arranged in the protective sleeve 14 is wound around the support body 15.

[0141] The support body 15 can be made of insulating material and has a certain strength to support the heating element 11. Alternatively, the support body 15 can be made of synthetic fiber material, such as glass fiber, ceramic fiber, etc.

[0142] The heating element 11 located in the protective sleeve 14 is wound around the support body 15, which means that the heating element 11 located in the protective sleeve 14 can be arranged in a spiral structure. In this way, the connection stability between the two can be improved, which facilitates the support effect of the support body 15 on the heating element 11, prevents the heating element 11 from deforming or displacing, thereby facilitating the reliability of the heating device 10. In addition, when assembling the two, the heating power can be adjusted by changing the pitch of the heating element 11, which is flexible. Specifically, the more dense the heating element 11 is, the higher the heating efficiency is.

[0143] Please refer to Figure 2 to Figure 8 The battery device 1 provided by the embodiment of the present application comprises a box body 200, a battery monomer 100 and a heating device 10. The battery monomer 100 is arranged in the box body 200, and the heating device 10 is arranged in the box body 200. The heating device 10 comprises a heating element 11, an electric connecting element 12, a pressure connecting element 13 and a protective sleeve 14.

[0144] Part of the heating element 11 is arranged in the protective sleeve 14, and the other part extends out of the protective sleeve 14 and is in conductive connection with the electric connecting element 12. The outer periphery of the electric connecting element 12 is recessed inward to form a groove 121. From the direction of the electric connecting element 12 pointing to the heating element 11, the groove 121 is in a spiral structure, and the heating element 11 is wound around the electric connecting element 12 and embedded in the groove 121. The pressure connecting element 13 comprises a pressure connecting sleeve 131 and an adapter 132. The pressure connecting sleeve 131 and the protective sleeve 14 are connected through the adapter 132. The adapter 132 has a first part 1321 and a second part 1322. The first part 1321 is sleeved on the outer periphery of the protective sleeve 14. The second part 1322 is connected between one end of the first part 1321 facing the pressure connecting sleeve 131 and one end of the pressure connecting sleeve 131 facing the first part 1321. The first part 1321 has a first end part 13211, a body 13212 and a second end part 13213 connected in sequence along the circumferential direction of the first part 1321. The first end part 13211 and the second end part 13213 have a gap 13214 along the circumferential direction. From the direction of the body 13212 pointing to the first end part 13211, the size of the first end part 13211 in the direction of the first part 1321 pointing to the pressure connecting sleeve has a decreasing trend. From the direction of the body 13212 pointing to the second end part 13213, the size of the second end part 13213 in the direction of the first part 1321 pointing to the pressure connecting sleeve has a decreasing trend.

[0145] The crimping sleeve 131 has a first opening 1311 and a second opening 1312 facing opposite directions, one of the first opening 1311 and the second opening 1312 faces the heating element 11, and the other one faces the electrical connecting element 12. In the direction from the first opening 1311 to the second opening 1312, the cross-sectional size of the crimping sleeve 131 gradually decreases, so that a part of the heating element 11 located in the crimping sleeve 131 abuts between the crimping sleeve 131 and the electrical connecting element 12, and another part is arranged in a gap with at least one of the crimping sleeve 131 and the electrical connecting element 12. Alternatively, in the direction from the electrical connecting element 12 to the heating element 11, the cross-sectional size of the electrical connecting element 12 located in the crimping sleeve 131 gradually decreases or gradually increases, so that a part of the heating element 11 located in the crimping sleeve 131 abuts between the crimping sleeve 131 and the electrical connecting element 12, and another part is arranged in a gap with at least one of the crimping sleeve 131 and the electrical connecting element 12.

[0146] According to some embodiments of the present application, the present application also provides an electric device, which comprises the battery cell 100 provided by any one of the above embodiments or the battery device 1 provided by any one of the above embodiments, and the battery cell 100 or the battery device 1 is used for storing or providing electric energy.

[0147] Please refer to Figure 2 to Figure 5 The present application provides a heating device 10, which comprises a heating element 11, an electrical connecting element 12, and a crimping element 13. The heating element 11 is connected to the outer circumferential surface of the electrical connecting element 12 and is electrically connected to the electrical connecting element 12. The crimping element 13 comprises a crimping sleeve 131, which is arranged at the connection between the heating element 11 and the electrical connecting element 12 to fix the heating element 11 and the electrical connecting element 12. A part of the heating element 11 located in the crimping sleeve 131 abuts between the crimping sleeve 131 and the electrical connecting element 12, and another part is arranged in a gap with at least one of the crimping sleeve 131 and the electrical connecting element 12.

[0148] The heating device 10 provided by some embodiments of the present application ensures the stability of the electrical connection between the heating element 11 and the electrical connecting element 12 by abutting a part of the heating element 11 located in the crimping sleeve 131 between the crimping sleeve 131 and the electrical connecting element 12, so that current can pass between the two, thereby enabling the heating element 11 to achieve a heating effect. In addition, by arranging another part of the heating element 11 located in the crimping sleeve 131 in a gap with at least one of the crimping sleeve 131 and the electrical connecting element 12, the problem of deformation or damage of the heating element 11 caused by excessive compression can be prevented, thereby facilitating the improvement of the stability and service life of the heating element 11, and further facilitating the improvement of the reliability of the heating device 10.

[0149] The heating device 10 provided by the embodiments of the present application is suitable for various devices with heating requirements, such as electric kettles, electric hair dryers and the like, and can also be used in various electric devices using battery devices, such as electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, such as aircraft, rockets, space shuttles and spaceships. It should be understood that the technical solutions described in the embodiments of the present application are not only limited to the above-mentioned devices, but can also be applied to all devices and equipment using the heating device 10.

[0150] For a better understanding of the present application, reference will be made to the following drawings: Figure 4 to Figure 8 The embodiments of the present application provide a heating device 10, a heating element 11, an electrical connecting element 12, a compression element 13 and a protective sleeve 14.

[0151] Part of the heating element 11 is arranged in the protective sleeve 14, and the other part protrudes from the protective sleeve 14 and is in conductive connection with the electrical connecting element 12. The outer periphery of the electrical connecting element 12 is recessed inward to form a groove 121. From the direction of the electrical connecting element 12 pointing to the heating element 11, the groove 121 has a spiral structure, and the heating element 11 is wound around the electrical connecting element 12 and embedded in the groove 121. The compression element 13 includes a compression sleeve 131 and an adapter 132, and the compression sleeve 131 and the protective sleeve 14 are connected through the adapter 132. The adapter 132 has a first part 1321 and a second part 1322. The first part 1321 is sleeved on the outer periphery of the protective sleeve 14, and the second part 1322 is connected between one end of the first part 1321 facing the compression sleeve 131 and one end of the compression sleeve 131 facing the first part 1321. The first part 1321 has a first end portion 13211, a body 13212 and a second end portion 13213 connected in sequence along the circumferential direction of the first part 1321. The first end portion 13211 and the second end portion 13213 have a gap 13214 along the circumferential direction. From the direction of the body 13212 pointing to the first end portion 13211, the size of the first end portion 13211 in the direction of the first part 1321 pointing to the compression sleeve has a decreasing trend. From the direction of the body 13212 pointing to the second end portion 13213, the size of the second end portion 13213 in the direction of the first part 1321 pointing to the compression sleeve has a decreasing trend.

[0152] The crimping sleeve 131 has a first opening 1311 and a second opening 1312 facing opposite directions, one of the first opening 1311 and the second opening 1312 faces the heating element 11, and the other one faces the electrical connecting element 12. In the direction from the first opening 1311 to the second opening 1312, the cross-sectional size of the crimping sleeve 131 gradually decreases, so that a part of the heating element 11 located in the crimping sleeve 131 abuts between the crimping sleeve 131 and the electrical connecting element 12, and another part is arranged in a gap with at least one of the crimping sleeve 131 and the electrical connecting element 12. Alternatively, in the direction from the electrical connecting element 12 to the heating element 11, the cross-sectional size of the electrical connecting element 12 located in the crimping sleeve 131 gradually decreases or gradually increases, so that a part of the heating element 11 located in the crimping sleeve 131 abuts between the crimping sleeve 131 and the electrical connecting element 12, and another part is arranged in a gap with at least one of the crimping sleeve 131 and the electrical connecting element 12.

[0153] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0154] 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 for part of the 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 heating element, an electrical connecting element and a crimping element, the heating element being connected to an outer circumferential surface of the electrical connecting element and being in conductive connection with the electrical connecting element, the crimping element comprising a crimping sleeve, the crimping sleeve being sleeved at a connection between the heating element and the electrical connecting element to fix the heating element and the electrical connecting element; wherein a part of the heating element in the crimping sleeve abuts between the crimping sleeve and the electrical connecting element, and another part is arranged in a gap with at least one of the crimping sleeve and the electrical connecting element.

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 crimping sleeve has first and second openings facing in opposite directions, one of the first and second openings faces the heating element, and the other one faces the electrical connecting element, an area of the first opening is greater than an area of the second opening.

4. The battery device of claim 3, wherein In a direction from the first opening to the second opening, a cross-sectional dimension of the crimping sleeve gradually decreases.

5. The battery device of claim 1, wherein In a direction from the electrical connecting element to the heating element, a cross-sectional dimension of the electrical connecting element in the crimping sleeve decreases, or a cross-sectional dimension of the electrical connecting element in the crimping sleeve increases.

6. The battery device according to any one of claims 1 to 5, characterized by An outer circumferential surface of the electrical connecting element is recessed inward to form a groove, and the heating element is embedded in the groove.

7. The battery device of claim 6, wherein In a direction from the electrical connecting element to the heating element, the groove has a spiral structure, and the heating element is wound around the electrical connecting element.

8. The battery device according to any one of claims 1 to 5, wherein The heating device further comprises a protective layer arranged between the crimping sleeve and the heating element.

9. The battery device according to any one of claims 1 to 5, wherein The heating device further comprises a protective sleeve, a part of the heating element is arranged in the protective sleeve, and another part of the heating element extends out of the protective sleeve and is connected to the electrical connecting element.

10. The battery device of claim 9, wherein, The crimping element further comprises an adapter, and the crimping sleeve and the protective sleeve are connected through the adapter.

11. The battery device of claim 10, wherein, The adapter has first and second parts, the first part is sleeved on an outer circumferential surface of the protective sleeve, and the second part is connected between one end of the first part facing the crimping sleeve and one end of the crimping sleeve facing the first part.

12. The battery device of claim 11, wherein, The first part has a first end portion, a body and a second end portion connected in sequence along a circumferential direction of the first part, and the first end portion and the second end portion have gaps along the circumferential direction.

13. The battery device of claim 12, wherein, In a direction from the body to the first end portion, a dimension of the first end portion in a direction from the first part to the crimping sleeve decreases, and / or in a direction from the body to the second end portion, a dimension of the second end portion in the direction from the first part to the crimping sleeve decreases.

14. An electrical device, characterized by The battery device comprises any one of 1 to 13, and is used for storing or providing electric energy.

15. A heating device, characterized by The battery device comprises: a heating element; an electrical connecting element, the heating element being connected to an outer circumferential surface of the electrical connecting element and being in conductive connection with the electrical connecting element; A crimping member connected to the outer circumferential surface of the electrical connecting member and electrically connected with the electrical connecting member, the crimping member comprising a crimping sleeve, the crimping sleeve being sleeved at the connection between the heating member and the electrical connecting member to fix the heating member and the electrical connecting member; wherein a part of the heating member located in the crimping sleeve abuts between the crimping sleeve and the electrical connecting member, and another part is arranged in a gap with at least one of the crimping sleeve and the electrical connecting member.

Images