Heating components, battery devices and electrical equipment

Abstract

The present application relates to the field of battery technology, and provides a heating component, a battery device, and an electrical device. The heating component is used to heat a battery cell, and the heating component includes an insulating member and a heating member. The insulating member is arranged on the battery cell, and the insulating member includes a first insulating segment and a second insulating segment. The first insulating segment is arranged corresponding to the battery cell, and the second insulating segment is configured to span two adjacent battery cells, and the two adjacent first insulating segments are connected by the second insulating segment; the heating member includes a first heating segment arranged on the first insulating segment and a second heating segment arranged on the second insulating segment, and the two adjacent first heating segments are connected by the second heating segment; wherein the second insulating segment is configured to be able to switch from an initial state to a stretched state. When the battery cell expands or contracts, the second insulating segment will stretch, elongate, or shorten to accommodate the size changes of the battery cell and reduce the possibility of relative displacement between the battery cell and the insulating member.

Description

Technical Field

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

[0002] In the related technology, the battery device is the power source of new energy vehicles and is the core component of new energy vehicles. The battery device is often equipped with a heating component to perform thermal management on the battery cells in the battery device to achieve the best charging and discharging state. When the battery device is charging and discharging, the battery cells will expand and contract, and relative displacement will occur between the battery cells. The heating component of the battery device will be pulled due to the relative displacement between the battery cells, which is prone to wrinkles and dry burning, affecting the reliability of the heating component. Utility Model Content

[0003] In view of this, the embodiments of the present application are intended to provide a heating component, a battery device, and an electrical device that can accommodate the relative displacement caused by the expansion of the battery cells, reduce the possibility of wrinkles and dry burning of the heating component, and improve the reliability of the heating component.

[0004] A first aspect of an embodiment of the present application provides a heating assembly for heating a battery cell, wherein the heating assembly comprises:

[0005] an insulating member, disposed on the battery cell, the insulating member comprising a first insulating segment and a second insulating segment, the first insulating segment being disposed corresponding to the battery cell, the second insulating segment being configured to span two adjacent battery cells, and the two adjacent first insulating segments being connected via the second insulating segment;

[0006] A heating element, used to heat the battery cell, the heating element comprising a first heating segment disposed on the first insulating segment and a second heating segment disposed on the second insulating segment, two adjacent first heating segments being connected via the second heating segment;

[0007] The second insulating segment is configured to be switchable from an initial state to a stretched state, wherein the length dimension of the second insulating segment is a first dimension in the initial state, and the second insulating segment can be stretched to a second dimension in the stretched state, and the second dimension is larger than the first dimension.

[0008] In this embodiment, the battery cell is heated by the heating element; the insulating element is provided between the heating element and the battery cell for insulation to prevent short circuit; when the battery cell expands or contracts, the second insulating section will stretch, elongate or shorten to accommodate the size change of the battery cell and reduce the possibility of relative displacement between the battery cell and the insulating element. For example, when the battery cell and the insulating element are fixed by adhesive, it can prevent the battery cell and the insulating element from drying out after debonding, thereby improving the reliability of the heating component.

[0009] In some embodiments, the second heating segment is configured to be switchable from an initial state to a stretched state, wherein the length dimension of the second heating segment is the first dimension, and wherein the second heating segment can be stretched to the second dimension.

[0010] The second heating section can be stretched, that is, the second heating section has a certain redundant length along the first direction. When the battery cell expands or contracts, the second heating section will stretch, elongate or shorten to accommodate the size change of the battery cell. In this way, the second heating section can have a deformation amount. When the battery cell expands and the heating component is stretched, the second heating section can be deformed and stretched, reducing the possibility of wrinkling or being stretched and broken in the second heating section when the battery cell expands, thereby improving the reliability of the heating component.

[0011] In some embodiments, two adjacent first insulating segments are spaced apart to form a window area.

[0012] The window area separates the adjacent first insulating sections. The window area can effectively reduce the stress pulling between the battery cell and the insulating member, thereby achieving local buffering to adapt to the expansion of the battery cell, reduce the possibility of the insulating member detaching from the battery cell and causing empty burning, and can improve the heating efficiency and heating uniformity of the heating component.

[0013] In some embodiments, the second insulating segment is connected to one end of the first insulating segment, and the window area extends from the second insulating segment to the other end of the first insulating segment.

[0014] In this way, the available area of ​​the window opening area can be increased and the buffering effect of the window opening area can be enhanced.

[0015] In some embodiments, adjacent second insulating segments are disposed at the same end of the first insulating segment.

[0016] In some embodiments, adjacent second insulating segments are alternately disposed at two ends of the first insulating segment.

[0017] That is to say, the second heating segments are alternately arranged at both ends of the first heating segment. In this way, the second insulating segment can have a larger space to occupy, and the length of the second insulating segment can be appropriately increased according to the design requirements, reducing the possibility that the insufficient length of the second insulating segment affects the tensile deformation effect of the second insulating segment.

[0018] In some embodiments, the insulating member includes a third insulating segment located in the window area; in the initial state, two adjacent first insulating segments are connected by the third insulating segment; in the stretched state, adjacent first insulating segments are disconnected from each other at the third insulating segment.

[0019] By providing the third insulating section to connect the first insulating section, when the insulating member is installed on the battery cell, for example, when the insulating member is attached to the battery cell by means of a fixing glue, the insulating member can be conveniently moved as a whole and attached to the battery cell, and the release paper on the surface of the fixing glue can be conveniently removed. In addition, the possibility of the insulating member being separated from the surface of the battery cell can be reduced.

[0020] In some embodiments, the second insulating segment and the third insulating segment are respectively disposed at two ends of the first insulating segment.

[0021] In this way, the second insulating segment can connect one end of two adjacent first insulating segments, the third insulating segment can connect the other end of two adjacent first insulating segments, and the second insulating segment, the third insulating segment and the two adjacent first insulating segments can form a relatively fixed whole. When the insulating member is installed on the battery cell assembly, for example, when the insulating member is attached to the battery cell assembly by fixing glue, it is convenient to move the insulating member as a whole and attach it to the battery cell assembly, and it is convenient to remove the release paper on the surface of the fixing glue.

[0022] In some embodiments, a width of the third insulating segment is greater than or equal to 1.0 mm and less than or equal to 5.0 mm.

[0023] This can prevent the width of the third insulating section from being too small, causing the third insulating section to be disconnected before the heating assembly is installed on the battery cell, causing installation inconvenience. At the same time, it can prevent the width of the third insulating section from being too large, causing the third insulating section to be unable to be disconnected smoothly when the battery cell is deformed, causing interference with the deformation of the second insulating section and the second heating section. The width of the third insulating section refers to the dimension along the third side.

[0024] In some embodiments, the second insulating segment is formed as a curved segment or a broken line segment.

[0025] In some embodiments, the second insulating section and the second heating section are both symmetrically arranged along a center line between two adjacent battery cells.

[0026] That is, the second insulating section and the second heating section both span two adjacent battery cells, and the second insulating section spans the same size of two adjacent battery cells, and the second heating section spans the same size of two adjacent battery cells. When the battery cell expands or contracts, the battery cell deforms, and the second insulating section and the second heating section can deform evenly, reducing the possibility of relative displacement between the first insulating section and the second insulating section and the battery cell.

[0027] In some embodiments, the first heating segment is a resistance wire, and the resistance wire is disposed in a circuitous manner in the first insulating segment.

[0028] In this way, more heating elements can be arranged in a limited space, increasing the contact area with the battery cells, and rapidly heating the battery cells over a large area, effectively improving the heating rate. The circuitous arrangement facilitates the design of resistance wires of different lengths to meet different heating power requirements.

[0029] In some embodiments, the resistance of the second heating segment is smaller than the resistance of the first heating segment.

[0030] That is to say, the width of the second heating section is greater than the width of the first heating section, which can reduce the heat generated by the second heating section and reduce the possibility of debonding when the second heating section is stretched due to excessive temperature. The width of the second heating section refers to the dimension along the third direction.

[0031] In some embodiments, the heating element and the insulating element are both integral components.

[0032] In this way, the heating element and the insulating element can be easily installed, the number of parts can be reduced, the assembly process can be simplified, and the overall structural strength of the heating assembly can be improved.

[0033] In some embodiments, the insulating member is configured in a film shape.

[0034] The insulating member is configured in a film shape to reduce the weight of the battery, which is conducive to the lightweight design of the battery. It is easy to cut into the required shape according to actual needs and easy to attach to the surface of the battery cell. It can be installed by a simple pasting method, such as pasting with a fixing glue, which is convenient and quick to operate.

[0035] In some embodiments, the insulating member is configured in a plate shape.

[0036] The insulating member is configured in a plate shape to have higher strength, can better withstand external impact or extrusion, and provide a stable physical barrier. The plate-shaped insulating member is generally installed on the battery cell by mechanical connection or adhesive connection.

[0037] In some embodiments, the insulating member is made of polyimide.

[0038] The polyimide insulation layer has a high melting point and good insulation performance, which can reduce the probability of insulation failure between the heating component and the outside world.

[0039] In some embodiments, the heating element is made of metal.

[0040] For example, the material of the heating element may be stainless steel or copper, etc., and the manufacturing technology is mature, and resistance wires with different directions can be processed and manufactured based on actual needs.

[0041] In some embodiments, the heating element is disposed between the two insulating elements.

[0042] In this way, the surface of the heating element is wrapped by the insulating element, which can improve the insulation effect of the heating element. It prevents the heating element from directly contacting the battery cell or other conductive parts to avoid short circuit. Exemplarily, two insulating elements are arranged at intervals along the second direction, and the heating element is arranged between the two insulating elements. The two insulating elements and the heating element are both arranged along the first direction.

[0043] In some embodiments, the heating assembly further includes a lead wire and a connector, wherein two ends of the lead wire are respectively connected to the heating element and the connector, and the connector is used to connect the heating element to an external power source.

[0044] The connector is connected to the heating element through a lead wire, and the heating element is powered on by electric energy provided by an external power source to generate heat to heat the battery cell.

[0045] In some embodiments, the heating assembly further includes a fixing glue for fixing the insulating member to the battery cell.

[0046] Fixing the insulating parts with fixing glue is simple, fast and low-cost, and can be applied to a variety of materials.

[0047] A second aspect of an embodiment of the present application provides a battery device, including:

[0048] The heating component described in the embodiments of the present application.

[0049] The battery device provided in the embodiment of the present application has the same beneficial effects as the above-mentioned heating assembly.

[0050] A third aspect of the embodiments of the present application provides an electrical device, including:

[0051] The heating component described in the embodiment of the present application; or,

[0052] The battery device described in the embodiments of the present application.

[0053] The electrical device provided in the embodiment of the present application has the same beneficial effects as the above-mentioned heating assembly. The electrical device can be a mobile phone, a portable device, a laptop computer, a battery car, an electric toy, an electric tool, a vehicle, a ship, and a spacecraft, for example, a spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the structure of a heating component in one embodiment of the present application;

[0055] Figure 2 is a schematic structural diagram of a battery cell in an embodiment of the present application;

[0056] Figure 3 It is a partial structural schematic diagram of a battery cell and a heating assembly in one embodiment of the present application;

[0057] Figure 4 for Figure 1 A magnified schematic diagram of point A;

[0058] Figure 5 It is a schematic diagram of the structure of an electrical device in one embodiment of the present application.

[0059] Description of Reference Numerals

[0060] Heating assembly 100; insulating member 10; first insulating section 11; second insulating section 12; window area 10a; third insulating section 13; heating member 20; first heating section 21; second heating section 22; lead 30; connector 40; battery cell 200; side surface 201; large surface 202; battery device 300; electrical equipment 1000. DETAILED DESCRIPTION

[0061] The following is a further detailed description of the implementation of the present application in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application.

[0062] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms "first direction", "second direction", "third direction", "height direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0063] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0064] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "on" or "below" a second feature may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact through an intermediate medium.

[0065] In the description of this specification, the description with reference to the terms "some embodiments", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine different embodiments or examples described in this application and the features of different embodiments or examples without contradiction.

[0066] In the relevant technologies, energy conservation and emission reduction are the key to the sustainable development of the automobile industry. New energy vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. The battery device is the power source of new energy vehicles and is the core component of new energy vehicles. The endurance, charging speed, and battery life of new energy vehicles all require a reliable thermal management system. Under low temperature conditions, the charging and discharging capabilities of the battery device are poor, and a heating component needs to be configured to heat the battery cells in the battery device to achieve the optimal charging and discharging state. When the battery cells are charged and discharged, the battery cells will expand or contract, and relative displacement will occur between the battery cells. For example, when the heating component is bonded to the battery cell by fixing glue, the heating component will be pulled due to the relative displacement between the battery cells, resulting in debonding and dry burning problems, affecting the reliability of the heating component.

[0067] In view of this, please refer to Figure 1-Figure 4, the embodiment of the present application provides a heating assembly 100 for heating a battery cell 200, and the heating assembly 100 includes an insulating member 10 and a heating member 20. The insulating member 10 is disposed on the battery cell 200, and the insulating member 10 includes a first insulating segment 11 and a second insulating segment 12, the first insulating segment 11 is disposed corresponding to the battery cell 200, and the second insulating segment 12 is configured to span two adjacent battery cells 200, and the two adjacent first insulating segments 11 are connected by the second insulating segment 12; the heating member 20 is used to heat the battery cell 200, and the heating member 20 includes a first heating segment 21 disposed on the first insulating segment 11 and a second heating segment 22 disposed on the second insulating segment 12, and the two adjacent first heating segments 21 are connected by the second heating segment 22; wherein the second insulating segment 12 is configured to be able to switch from an initial state to a stretched state, and in the initial state, the length dimension of the second insulating segment 12 is a first dimension, and in the stretched state, the second insulating segment 12 can be stretched to a second dimension, and the second dimension is greater than the first dimension.

[0068] 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.

[0069] 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.

[0070] The battery cells may be cylindrical battery cells, prismatic battery cells, soft-pack battery cells or battery cells of other shapes. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal prismatic batteries. Polygonal prismatic batteries are, for example, hexagonal prismatic batteries, etc. There is no particular limitation in this application.

[0071] In the present application, square shell batteries are used as an example for explanation. Figure 1-Figure 3 , where X represents the first direction, Y represents the second direction, and Z represents the third direction. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The side surface 201 of the battery cell 200 is located in the first direction X, the large surface 202 of the battery cell 200 is located in the second direction Y, and the height direction of the battery cell 200 is located in the third direction Z. A plurality of battery cells 200 are arranged along the first direction X to form a battery cell assembly, and a buffer pad is generally provided between two adjacent battery cells 200. The heating assembly 100 can be provided on the battery cell assembly along the first direction X, that is, provided on the side surfaces 201 of the plurality of battery cells 200.

[0072] The first insulating section 11 and the first heating section 21 are arranged one-to-one, and the second insulating section 12 and the second heating section 22 are arranged one-to-one. The first insulating section 11 is arranged corresponding to the battery cell 200, and the first heating section 21 arranged in the first insulating section 11 is also arranged corresponding to the battery cell 200 to heat the battery cell 200.

[0073] The second insulating segment 12 can be stretched, that is, the second insulating segment 12 has a certain redundant length along the first direction X. When the battery cell 200 expands or contracts, the second insulating segment 12 will stretch, elongate or shorten to accommodate the size change of the battery cell 200. In this way, the second insulating segment 12 can have a deformation amount. When the battery cell 200 expands and the heating component 100 is stretched, the second insulating segment 12 can be deformed and stretched, reducing the possibility of the second insulating segment 12 being wrinkled or stretched and broken when the battery cell 200 expands, thereby improving the reliability of the heating component 100.

[0074] Exemplarily, in the initial state, along the first direction X, the length dimension of the second insulating segment 12 is the first dimension, and in the stretched state, along the first direction X, the length dimension of the second insulating segment 12 is the second dimension. That is, the length dimension of the second insulating segment 12 refers to the distance between the two ends of the second insulating segment 12 along the first direction X. In the initial state, the second insulating segment 12 has a redundant length to accommodate the deformation of the battery cell 200. When the battery cell 200 expands or contracts, the second insulating segment 12 can be stretched, elongated or shortened. For example, the battery cell 200 and the insulating member 10 are bonded by a fixing glue, and the provision of the second insulating segment 12 can reduce the possibility of debonding between the battery cell 200 and the insulating member 10 after deformation.

[0075] The initial state may include when the heating assembly 100 is used in the battery device and the battery cell 200 is not expanded or expanded so that the thickness of the battery cell 200 is still within a preset threshold range. Alternatively, the stretched state may include when the battery cell 200 expands and the expansion causes the thickness of the battery cell 200 to exceed the preset threshold range.

[0076] There is no limitation on the way to realize the redundant length of the second insulating segment 12. Specifically, the second insulating segment 12 can be set to extend along a curved trajectory, or to be set to multiple fold line segments, as long as it can meet the requirements of adapting to the size change of the battery cell 200. Exemplarily, the second insulating segment 12 is formed as a curved segment or a fold line segment. For example, the curved segment can be S-shaped or U-shaped, etc., and the fold line segment can be V-shaped, etc. For example, the second insulating segment 12 is formed into a single S-shape, a single U-shape, or a single V-shape, or is formed into multiple S-shapes, multiple U-shapes, or multiple V-shapes, or is formed into a combination of at least two of the S-shape, U-shape, and V-shape. Please refer to Figure 3 , the second insulating section 12 is V-shaped.

[0077] Exemplarily, the second heating segment 22 is configured to be switchable from an initial state to a stretched state, in which the length dimension of the second heating segment 22 is a first dimension, and in the stretched state the second insulating segment 12 can be stretched to a second dimension.

[0078] The second heating segment 22 can be stretched, that is, the second heating segment 22 has a certain redundant length along the first direction X. When the battery cell 200 expands or contracts, the second heating segment 22 will stretch, elongate or shorten to accommodate the size change of the battery cell 200. In this way, the second heating segment 22 can have a deformation amount. When the battery cell 200 expands and the heating component 100 is stretched, the second heating segment 22 can be deformed and stretched, reducing the possibility of the second heating segment 22 being wrinkled or stretched and broken when the battery cell 200 expands, thereby improving the reliability of the heating component 100.

[0079] Exemplarily, in the initial state, the length dimension of the second heating segment 22 along the first direction X is the first dimension, and in the stretched state, the length dimension of the second heating segment 22 along the first direction X is the second dimension. That is, the length dimension of the second heating segment 22 refers to the distance between the two ends of the second heating segment 22 along the first direction X. In the initial state, the second heating segment 22 has a redundant length to adapt to the deformation of the battery cell 200, and when the battery cell 200 expands or contracts, the second heating segment 22 can be stretched, elongated or shortened.

[0080] There is no limitation on the way to realize the redundant length of the second heating segment 22. Specifically, the second heating segment 22 can be set to extend along a curved trajectory, or to be set to multiple fold line segments, as long as it can meet the requirements of adapting to the size changes of the battery cell 200. Exemplarily, the second heating segment 22 is formed as a curved segment or a fold line segment. For example, the curved segment can be S-shaped or U-shaped, etc., and the fold line segment can be V-shaped, etc. For example, the second heating segment 22 is formed into a single S-shape, a single U-shape, or a single V-shape, or is formed into multiple S-shapes, multiple U-shapes, or multiple V-shapes, or is formed into a combination of at least two of the S-shape, U-shape, and V-shape. Please refer to Figure 3 , the second heating section 22 is V-shaped.

[0081] For example, the second insulating section 12 and the second heating section 22 have the same shape, both are curved sections, such as S-shaped, U-shaped, etc.; or the second insulating section 12 and the second heating section 22 have the same shape, both are broken line sections, such as V-shaped, etc. Figure 3 The second insulating section 12 and the second heating section 22 are both V-shaped.

[0082] That is to say, the second heating segment 22 and the second insulating segment 12 have the same length dimension before and after stretching. When the battery cell 200 expands or contracts, the second insulating segment 12 and the second heating segment 22 have basically the same length dimension variable. The second insulating segment 12 and the second heating segment 22 are correspondingly arranged. When the battery cell 200 expands or contracts, the second insulating segment 12 and the second heating segment 22 are deformed to prevent the second insulating segment 12 and the second heating segment 22 from being misaligned in position.

[0083] The position of the second insulating segment 12 between each two adjacent first insulating segments 11 is not limited, and can be connected to the middle position of the two first insulating members 10, or connected to the ends of the two first insulating members 10. For example, see Figure 3 The second insulating section 12 is connected to one end of two adjacent first insulating sections 11. The position of the second heating section 22 is arranged corresponding to the second insulating section 12.

[0084] For example, see Figure 3 The second insulating section 12 and the second heating section 22 are both symmetrically arranged along the center line between two adjacent battery cells 200 .

[0085] That is, the second insulating section 12 and the second heating section 22 both span two adjacent battery cells 200, and the second insulating section 12 spans the same size of two adjacent battery cells 200, and the second heating section 22 spans the same size of two adjacent battery cells 200. When the battery cell 200 expands or contracts, the battery cell 200 deforms, and the second insulating section 12 and the second heating section 22 can deform evenly, reducing the possibility of relative displacement between the first insulating section 11 and the second insulating section 12 and the battery cell 200.

[0086] Exemplarily, the heating element 20 and the insulating element 10 are both integrated components, so that the heating element 20 and the insulating element 10 can be easily installed, the number of parts can be reduced, the assembly process can be simplified, and the overall structural strength of the heating assembly 100 can be improved.

[0087] Exemplarily, the insulating member 10 is configured in a film shape. The insulating member 10 is configured in a film shape to reduce the weight of the battery, which is conducive to realizing a lightweight design of the battery. It is convenient to cut into a desired shape according to actual needs and easy to attach to the surface of the battery cell 200. It can be installed by a simple pasting method, such as pasting with a fixing glue, which is convenient and quick to operate.

[0088] Exemplarily, the insulating member 10 is configured in a plate shape. The insulating member 10 is configured in a plate shape to have higher strength, can better withstand external impact or compression, and provide a stable physical barrier. The plate-shaped insulating member 10 is generally installed on the battery cell by mechanical connection or adhesive connection.

[0089] Exemplarily, the insulating member 10 is made of polyimide. The polyimide insulating layer has a high melting point and good insulation performance, which can reduce the probability of insulation failure between the heating component 100 and the outside world.

[0090] Exemplarily, the material of the heating element 20 is metal. Exemplarily, the material of the heating element 20 can be stainless steel or copper, etc., and the manufacturing technology is mature, and resistance wires with different directions can be processed and manufactured based on actual needs.

[0091] Exemplarily, the heating element 20 is disposed between the two insulating elements 10. In this way, the surfaces of the heating element 20 are all wrapped by the insulating element 10, which can improve the insulation effect of the heating element 20. Prevent the heating element 20 from directly contacting the battery cell 200 or other conductive parts to avoid short circuit. Exemplarily, the two insulating elements 10 are spaced apart along the second direction Y, the heating element 20 is disposed between the two insulating elements 10, and the two insulating elements 10 and the heating element 20 are both disposed along the first direction X.

[0092] The heating component 100 is fixed to the battery device in any manner. For example, the heating component 100 further includes a fixing glue for fixing the insulating member 10 to the battery cell 200. Fixing the insulating member 10 by the fixing glue is simple, fast and low-cost, and can be applied to a variety of materials.

[0093] For example, the fixing glue may be epoxy resin glue or polyurethane glue. Epoxy resin glue has high strength, heat resistance and good chemical stability. Polyurethane glue can achieve bonding between various substrates, such as plastics or metals, and has good flexibility and impact resistance.

[0094] For example, see Figure 3 The first heating section 21 is a resistance wire, which is arranged in a circuitous manner in the first insulating section 11. Using a resistance wire as the first heating section 21, the energy conversion efficiency of the resistance wire heating is high, the heating speed is fast, the temperature can be quickly increased, and it is easy to install and maintain. The resistance wire is arranged in a circuitous manner, and the type of the circuitous arrangement is not limited. More heating elements 20 can be arranged in a limited space, increasing the contact area with the battery cell 200, and rapidly heating the battery cell 200 over a large area, effectively improving the heating rate. And the circuitous arrangement facilitates the design of resistance wires of different lengths to meet different heating power requirements.

[0095] Exemplarily, the resistance value of the second heating segment 22 is smaller than the resistance value of the first heating segment 21 .

[0096] That is, the width of the second heating section 22 is greater than the width of the first heating section 21, which can reduce the heat generated by the second heating section 22 and reduce the possibility of debonding when the second heating section 22 is stretched due to excessive temperature. The width of the second heating section 22 refers to the dimension along the third direction Z.

[0097] The heating assembly 100 provided in the embodiment of the present application heats the battery cell 200 through the heating element 20; the insulating element 10 is provided between the heating element 20 and the battery cell 200 for insulation to prevent short circuit; when the battery cell 200 expands or contracts, the second insulating segment 12 will stretch, elongate or shorten to accommodate the size change of the battery cell 200, reducing the possibility of relative displacement between the battery cell 200 and the insulating element 10. For example, when the battery cell 200 and the insulating element 10 are fixed by adhesive bonding, it can prevent the battery cell 200 and the insulating element 10 from drying out after debonding, thereby improving the reliability of the heating assembly 100.

[0098] For some examples, see Figure 3 , two adjacent first insulating segments 11 are spaced apart to form a window area 10a.

[0099] The window area 10a separates the adjacent first insulating sections 11. The window area 10a can effectively reduce the stress pulling between the battery cell 200 and the insulating component 10, thereby achieving local buffering to adapt to the expansion of the battery cell 200, reduce the possibility of the insulating component 10 detaching from the battery cell 200 and causing a dry burn, and can improve the heating efficiency and heating uniformity of the heating component 100.

[0100] Exemplarily, the window area 10a is set corresponding to the midline of two adjacent battery cells 200. When the battery cell 200 expands and contracts, the window area 10a increases or decreases accordingly, which can reduce the pulling force on the insulating member 10. The first heating section 21 arranged on the first insulating section 11 is arranged corresponding to the battery cell 200, and keeps in contact with the battery cell 200 when the battery cell 200 expands. For example, when the insulating member 10 and the battery cell 200 are fixed by adhesive, the possibility of debonding between the insulating member 10 and the battery cell 200 can be reduced.

[0101] For some examples, see Figure 3 The second insulating segment 12 is connected to one end of the first insulating segment 11, and the window area 10a extends from the second insulating segment 12 to the other end of the first insulating segment 11. In this way, the available area of ​​the window area 10a can be increased, and the buffering effect of the window area 10a can be increased.

[0102] For some examples, see Figure 3, adjacent second insulating segments 12 are alternately arranged at both ends of the first insulating segment 11. That is, the second heating segments 22 are alternately arranged at both ends of the first heating segment 21. In this way, the second insulating segment 12 can have a larger space to occupy, and the length of the second insulating segment 12 can be appropriately increased according to the design requirements, reducing the possibility that the insufficient length of the second insulating segment 12 affects the tensile deformation effect of the second insulating segment 12.

[0103] In some other embodiments not shown, adjacent second insulating segments 12 are disposed at the same end of the first insulating segment 11. That is, the second heating segment 22 is disposed at the same end of the first heating segment 21.

[0104] For some examples, see Figure 3 The insulating member 10 includes a third insulating segment 13 located in the window area 10a; in the initial state, two adjacent first insulating segments 11 are connected by the third insulating segment 13; in the stretched state, the adjacent first insulating segments 11 are disconnected from each other at the third insulating segment 13.

[0105] By providing the third insulating segment 13 to connect the first insulating segment 11, when the insulating member 10 is installed on the battery cell 200, for example, when the insulating member 10 is attached to the battery cell 200 by a fixing glue, the insulating member 10 can be conveniently moved and attached to the battery cell 200 as a whole, and the release paper on the surface of the fixing glue can be conveniently removed. In addition, the possibility of the insulating member 10 being separated from the surface of the battery cell 200 can be reduced.

[0106] Exemplarily, the third insulating segment 13 is provided with a tear mark along the thickness direction, for example, the second direction, and the tear mark is provided corresponding to the midline between two adjacent battery cells 200. When the battery cell 200 expands or contracts, the third insulating segment 13 can be broken in time, reducing the possibility that the third insulating segment 13 cannot be broken and interferes with the deformation of the second insulating segment 12.

[0107] The third insulating segment 13 can be arranged at any segment of the window area 10a. The closer the third insulating segment 13 is to the end of the first insulating segment 11 away from the second insulating segment 12, the better the limiting effect on the first insulating segment 11 can be.

[0108] For example, see Figure 3 The second insulating segment 12 and the third insulating segment 13 are respectively arranged at two ends of the first insulating segment 11.

[0109] In this way, the second insulating segment 12 can connect one end of two adjacent first insulating segments 11, and the third insulating segment 13 can connect the other ends of two adjacent first insulating segments 11, and the second insulating segment 12, the third insulating segment 13 and the two adjacent first insulating segments 11 can form a relatively fixed whole. When the insulating member 10 is installed on the battery cell assembly, for example, when the insulating member 10 is attached to the battery cell assembly by a fixing glue, it is convenient to move the insulating member 10 as a whole and attach it to the battery cell assembly, and it is convenient to remove the release paper on the surface of the fixing glue.

[0110] In some embodiments, the width dimension of the third insulating segment 13 is greater than or equal to 1.0 mm (millimeter) and less than or equal to 5.0 mm. Exemplarily, the width dimension of the third insulating segment 13 may be 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm or 5.0 mm, etc. This is to prevent the width dimension of the third insulating segment 13 from being too small, resulting in the third insulating segment 13 being disconnected before the heating assembly 100 is installed on the battery cell 200, causing inconvenience in installation. At the same time, it can prevent the width dimension of the third insulating segment 13 from being too large, resulting in the third insulating segment 13 being unable to be disconnected smoothly when the battery cell 200 is deformed, and interfering with the deformation of the second insulating segment 12 and the second heating segment 22. Among them, the width of the third insulating segment 13 refers to the dimension along the third direction Z.

[0111] For some examples, see Figure 1 The heating assembly 100 further includes a lead 30 and a connector 40. The two ends of the lead 30 are respectively connected to the heating element 20 and the connector 40. The connector 40 is used to connect the heating element 20 to an external power source. The connector 40 is connected to the heating element 20 through the lead 30. The electric energy provided by the external power source causes the heating element 20 to generate heat after being powered on to heat the battery cell 200.

[0112] The present application also provides a battery device, including the heating assembly 100 described in any one of the embodiments of the present application. The battery device is used to store or provide electrical energy. The battery device may include one or more battery cell assemblies to provide voltage and capacity. The battery cell assembly may include a plurality of battery cells 200, and the plurality of battery cells 200 are connected in series, in parallel, or in mixed series through a busbar. In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells 200.

[0113] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, and the battery cell assembly is accommodated in the case. As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the case by fixing the battery module in the case. As an example, the battery cell assembly may also be accommodated in the case by directly fixing a plurality of battery cells 200 to the case.

[0114] The present application also provides an electric device 1000, including the heating assembly 100 described in any one of the embodiments of the present application. The electric device can be a mobile phone, a portable device, a laptop computer, a battery car, an electric toy, an electric tool, a vehicle, a ship, and a spacecraft, for example, a spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft.

[0115] For some examples, see Figure 5 , the electric device 1000 includes the battery device 300 in the embodiment of the present application.

[0116] In some embodiments, the heating assembly includes an insulating element 10 and a heating element 20 . The insulating member 10 is arranged on the battery cell 200, and the insulating member 10 includes a first insulating segment 11 and a second insulating segment 12. The first insulating segment 11 is arranged corresponding to the battery cell 200, and the second insulating segment 12 is configured to span two adjacent battery cells 200, and the two adjacent first insulating segments 11 are connected by the second insulating segment 12; the heating member 20 is used to heat the battery cell 200, and the heating member 20 includes a first heating segment 21 arranged on the first insulating segment 11 and a second heating segment 22 arranged on the second insulating segment 12, and the two adjacent first heating segments 21 are connected by the second heating segment 22; wherein, the second insulating segment 12 is configured to be able to switch from an initial state to a stretched state, in the initial state, the length dimension of the second insulating segment 12 is a first dimension, and in the stretched state, the second insulating segment 12 can be stretched to a second dimension, and the second dimension is greater than the first dimension; the second heating segment 22 is configured to be able to switch from an initial state to a stretched state, in the initial state, the length dimension of the second heating segment 22 is a first dimension, and in the stretched state, the second insulating segment 12 can be stretched to a second dimension. The heating element 20 is arranged between the two insulating elements 10. Among them, the second heating segment 22 and the second insulating segment 12 are formed into a broken line segment such as a V shape, and the second insulating segment 12 and the second heating segment 22 are symmetrically arranged along the midline between the two adjacent battery cells 200. The heating element 20 and the insulating element 10 are both integral components, the insulating element 10 is configured in a film shape, the material is polyimide, and the material of the heating element 20 is metal. The heating assembly 100 also includes a fixing glue for fixing the insulating element 10 on the battery cell 200. The first heating segment 21 is a resistance wire, and the resistance wire is arranged in a circuitous manner in the first insulating segment 11. The resistance value of the second heating segment 22 is less than the resistance value of the first heating segment 21. The two adjacent first insulating segments 11 are arranged at intervals to form a window area 10a, the second insulating segment 12 is connected to one end of the first insulating segment 11, and the window area 10a extends from the second insulating segment 12 to the other end of the first insulating segment 11. Adjacent second insulating segments 12 are alternately arranged at both ends of the first insulating segment 11. The insulating member 10 includes a third insulating segment 13 located in the window area 10a; the width of the third insulating segment 13 is 2.0 mm, and the second insulating segment 12 and the third insulating segment 13 are respectively arranged at both ends of the first insulating segment 11. In the initial state, two adjacent first insulating segments 11 are connected by the third insulating segment 13; in the stretched state, the adjacent first insulating segments 11 are disconnected from each other at the third insulating segment 13. The heating assembly 100 also includes a lead 30 and a connector 40, the two ends of the lead 30 are respectively connected to the heating member 20 and the connector 40, and the connector 40 is used to connect the heating member 20 to an external power source.

[0117] In this embodiment, the battery cell 200 is heated by the heating element 20; the insulating element 10 is provided between the heating element 20 and the battery cell 200 for insulation to prevent short circuit; when the battery cell 200 expands or contracts, the second insulating segment 12 will stretch, elongate or shorten to accommodate the size change of the battery cell 200 and reduce the possibility of relative displacement between the battery cell 200 and the insulating element 10. For example, when the battery cell 200 and the insulating element 10 are fixed by adhesive, it can prevent the battery cell 200 and the insulating element 10 from drying out after debonding, thereby improving the reliability of the heating assembly 100. The second heating segment 22 has a certain redundant length along the first direction X. When the battery cell 200 expands or contracts, the second heating segment 22 will stretch, elongate or shorten to accommodate the size change of the battery cell 200. The window area 10a separates the adjacent first insulating segments 11, which can effectively reduce the stress pulling between the battery cell 200 and the insulating member 10, thereby achieving local buffering to adapt to the expansion of the battery cell 200, reduce the possibility of the insulating member 10 detaching from the battery cell 200 and causing the phenomenon of empty burning, and improve the heating efficiency and heating uniformity of the heating component 100. The second heating segments 22 are alternately arranged at both ends of the first heating segment 21, and the second insulating segment 12 can have a larger space to occupy. The length of the second insulating segment 12 can be appropriately increased according to the design requirements, reducing the possibility that the insufficient length of the second insulating segment 12 affects the tensile deformation effect of the second insulating segment 12. By setting the third insulating segment 13 to connect the first insulating segment 11, when the insulating member 10 is installed on the battery cell 200, for example, when the insulating member 10 is attached to the battery cell 200 by fixing glue, it is convenient to move the insulating member 10 as a whole and stick it to the battery cell 200, and it is convenient to remove the release paper on the surface of the fixing glue. And it can reduce the possibility of the insulating member 10 detaching from the surface of the battery cell 200. When installing the insulating member 10 on the battery cell assembly, for example, when the insulating member 10 is attached to the battery cell assembly by means of a fixing glue, it is convenient to move the insulating member 10 as a whole and attach it to the battery cell assembly, and it is convenient to remove the release paper on the surface of the fixing glue. The width of the third insulating segment 13 is set to 2.0 mm to prevent the width of the third insulating segment 13 from being too small, causing the third insulating segment 13 to be disconnected before the heating assembly 100 is installed on the battery cell 200, causing inconvenience in installation. At the same time, it can prevent the width of the third insulating segment 13 from being too large, causing the third insulating segment 13 to be unable to be disconnected smoothly when the battery cell 200 is deformed, and interfering with the deformation of the second insulating segment 12 and the second heating segment 22.The second heating section 22 and the second insulating section 12 have the same length dimension before and after stretching. When the battery cell 200 expands or contracts, the second insulating section 12 and the second heating section 22 have substantially the same length dimension variable. The second insulating section 12 and the second heating section 22 are arranged correspondingly. When the battery cell 200 expands or contracts, the second insulating section 12 and the second heating section 22 are deformed to prevent the second insulating section 12 and the second heating section 22 from being misaligned. When the battery cell 200 expands or contracts, the battery cell 200 is deformed, and the second insulating section 12 and the second heating section 22 can be deformed uniformly, reducing the possibility of relative displacement between the first insulating section 11 and the second insulating section 12 and the battery cell 200. Using a resistance wire as the first heating section 21, the energy conversion efficiency of the resistance wire heating is high, the heating speed is fast, the temperature can be quickly increased, and it is easy to install and maintain. The resistance wire is arranged in a circuitous manner, and the type of the circuitous arrangement is not limited. More heating elements 20 can be arranged in a limited space, the contact area with the battery cell 200 is increased, and the battery cell 200 is quickly heated over a large area, effectively improving the heating rate. The circuitous arrangement facilitates the design of resistance wires of different lengths to meet different heating power requirements. The connector 40 is connected to the heating element 20 through the lead wire 30, and the electric energy provided by the external power source causes the heating element 20 to generate heat after being energized to heat the battery cell 200.

[0118] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heating assembly for heating a battery cell, characterized in that: The heating assembly comprises: an insulating member, disposed on the battery cell, the insulating member comprising a first insulating segment and a second insulating segment, the first insulating segment being disposed corresponding to the battery cell, the second insulating segment being configured to span two adjacent battery cells, and the two adjacent first insulating segments being connected via the second insulating segment; A heating element, used to heat the battery cell, the heating element comprising a first heating segment disposed on the first insulating segment and a second heating segment disposed on the second insulating segment, two adjacent first heating segments being connected via the second heating segment; The second insulating segment is configured to be switchable from an initial state to a stretched state, wherein the length dimension of the second insulating segment is a first dimension in the initial state, and the second insulating segment can be stretched to a second dimension in the stretched state, and the second dimension is larger than the first dimension.

2. The heating assembly according to claim 1, characterized in that The second heating segment is configured to be switchable from an initial state to a stretched state, wherein the length dimension of the second heating segment is the first dimension, and wherein the second heating segment can be stretched to the second dimension.

3. The heating assembly according to claim 1, characterized in that Two adjacent first insulating segments are spaced apart to form a window area.

4. The heating assembly according to claim 3, characterized in that The second insulating segment is connected to one end of the first insulating segment, and the window area extends from the second insulating segment to the other end of the first insulating segment.

5. The heating assembly according to claim 4, characterized in that Adjacent second insulating segments are arranged at the same end of the first insulating segment, or are alternately arranged at two ends of the first insulating segment.

6. The heating assembly according to claim 3, characterized in that The insulating member includes a third insulating section located in the window area; In the initial state, two adjacent first insulating segments are connected by the third insulating segment; in the stretched state, adjacent first insulating segments are disconnected from each other at the third insulating segment.

7. The heating assembly according to claim 6, characterized in that The second insulating section and the third insulating section are respectively arranged at two ends of the first insulating section.

8. The heating assembly according to claim 6, characterized in that The width of the third insulating segment is greater than or equal to 1.0 mm and less than or equal to 5.0 mm.

9. The heating assembly according to any one of claims 1 to 8, characterized in that: The second insulating segment is formed as a curved segment or a broken line segment.

10. The heating assembly according to any one of claims 1 to 8, characterized in that: The second insulating section and the second heating section are both symmetrically arranged along a center line between two adjacent battery cells.

11. The heating assembly according to any one of claims 1 to 8, characterized in that The first heating section is a resistance wire, and the resistance wire is arranged in a circuitous manner in the first insulating section.

12. The heating assembly according to any one of claims 1 to 8, characterized in that The resistance value of the second heating segment is smaller than the resistance value of the first heating segment.

13. The heating assembly according to any one of claims 1 to 8, characterized in that The heating element and the insulating element are both integral components.

14. The heating assembly according to claim 13, characterized in that The insulating member is configured in a film shape or a plate shape.

15. The heating assembly according to any one of claims 1 to 8, characterized in that The insulating element is made of polyimide; and / or the heating element is made of metal.

16. The heating assembly according to any one of claims 1 to 8, characterized in that The heating element is arranged between the two insulating elements.

17. The heating assembly according to any one of claims 1 to 8, characterized in that The heating assembly also includes a lead wire and a connector, two ends of the lead wire are respectively connected to the heating element and the connector, and the connector is used to connect the heating element to an external power source.

18. The heating assembly according to any one of claims 1 to 8, characterized in that The heating assembly also includes a fixing glue for fixing the insulating member on the battery cell.

19. A battery device, characterized in that: include: A heating assembly as claimed in any one of claims 1 to 18.

20. An electrical equipment, characterized in that: include: The heating assembly according to any one of claims 1 to 18; or, The battery device of claim 19.

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