Battery and electric device

Abstract

The utility model is applicable to the technical field of batteries, and provides a battery and a power utilization device, the battery comprises a battery unit and a heating assembly, the battery unit comprises a plurality of battery cells arranged in sequence, and the heating assembly is in contact with the battery unit. The heating assembly comprises a first protective layer, a second protective layer and a heating film, the first protective layer is in contact with the battery unit, the second protective layer is stacked on one side, far away from the battery unit, of the first protective layer, and the heating film is clamped between the first protective layer and the second protective layer. In the battery provided by the invention, the first protection layer and the second protection layer respectively limit the heating film from the two sides, so that abnormal temperature rise caused by poor heat dissipation of the upwarp part of the heating film is reduced or even avoided to a certain extent, and the use stability of the battery is improved.

Description

Technical Field

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

[0002] As environmental pollution becomes increasingly serious, people's environmental awareness is gradually increasing. At this time, the rapid rise of the new energy industry has provided broad space for the application and development of batteries.

[0003] To ensure the stability of battery operation when the ambient temperature is low, the battery needs to be heated. In related technologies, a heating film is typically used to heat the battery. The heating film is typically attached to the side of the battery cell. During use, some areas of the heating film may separate from the battery cell and warp. The area where the heating film is separated from the battery cell is prone to temperature rise, and the increased temperature of the heating film can easily ablate structures near the heating film, thereby affecting the stability of the battery. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a battery and an electrical device, aiming to solve the technical problem in the prior art that the temperature rise in the debonding area of ​​the heating film affects the stability of the battery.

[0005] To achieve the above objectives, the technical solution adopted in this application is:

[0006] In a first aspect, a battery is provided, comprising:

[0007] A battery unit, comprising a plurality of battery cells arranged in sequence;

[0008] A heating assembly is disposed in contact with the battery cell;

[0009] The heating component includes:

[0010] A first protective layer is provided in contact with the battery cell;

[0011] a second protective layer, stacked on a side of the first protective layer away from the battery cell;

[0012] The heating film is sandwiched between the first protective layer and the second protective layer.

[0013] In the battery provided in this embodiment, the first protective layer and the second protective layer respectively play a role of limiting and fixing the heating film on both sides of the heating film, so that the heat of the heating film can be dissipated through the first protective layer and the second protective layer, and to a certain extent avoid abnormal temperature rise caused by poor heat dissipation of the raised part of the heating film, thereby improving the stability of the battery.

[0014] In a possible design, the battery further includes a limiting structure, which is used to limit and fix the battery unit, and at least one of the first protective layer and the second protective layer is connected to the limiting structure.

[0015] In this setting, the limiting structure is fixed relatively to the battery cell, and the heating component is connected to the limiting structure through the first protective layer and / or the second protective layer, thereby indirectly being connected to the battery cell in a relative limiting manner, thereby improving the contact stability between the first protective layer and the battery cell.

[0016] In one possible design, the limiting structure includes two end plates spaced apart along a first direction, the two end plates are respectively fixed on both sides of the battery cell in the first direction, and at least one of the first protective layer and the second protective layer is connected to the two end plates.

[0017] In this arrangement, both ends of the heating component in the first direction are respectively connected to the limiting structures, and the connection stability is relatively high.

[0018] In a possible design, the first protective layer is connected to the two first end plates at both ends in the first direction, and the second protective layer is connected to the first protective layer.

[0019] In this setting mode, the assembly process is simple and easy to operate.

[0020] In a possible design, in the first direction, the length of the first protective layer is greater than the length of the second protective layer, and the length of the second protective layer is greater than the length of the heating film.

[0021] In this setting, since the length of the second protective layer is greater than the length of the heating film, it is easy to fix the heating film between the first protective layer and the second protective layer. Since the length of the first protective layer is greater than the length of the second protective layer, it is easy to fix the first protective layer to the limiting structure.

[0022] In a possible design, the first protective layer is provided with assembly holes at both ends in the first direction, and the battery further includes a fixing member passing through the assembly hole, and the first protective layer is connected to the two end plates respectively through the fixing member.

[0023] In this arrangement, the connection between the first protective layer and the end plate is simple, easy to operate, and has high connection efficiency.

[0024] In a possible design, the outer peripheral edge of the second protective layer is connected to the first protective layer.

[0025] In this arrangement, the connection area between the first protective layer and the second protective layer is larger, and the connection stability is stronger.

[0026] In a possible design, the first protective layer and the second protective layer are fixed by welding.

[0027] In this arrangement, a clamping force is generated between the first protective layer and the second protective layer during the welding process, so as to further improve the limiting effect on the heating film.

[0028] In a possible design, the heating film is provided with a connection hole, which passes through the heating film along the thickness direction of the heating film, and the first protective layer is connected to the second protective layer via a connection structure passing through the connection hole.

[0029] In this arrangement, the connection area between the first protective layer and the second protective layer is larger, and the connection stability is stronger.

[0030] In a possible design, at least one of the first protective layer and the second protective layer is a conductive structure and is electrically connected to the limiting structure, and the limiting structure is used to connect to the insulation detection module.

[0031] In this embodiment, the insulation performance of the limiting structure can be detected by the insulation detection module, so that when the heating film is punctured, it can be detected in time, thereby improving the stability of battery use.

[0032] In one possible design, the battery further includes a battery management device, which includes an insulation detection module.

[0033] In this configuration, the insulation performance of the limiting structure is detected by the insulation detection module in the battery management device within the battery, without the need to connect other external insulation detection modules.

[0034] In a possible design, the first protective layer and the second protective layer are both conductive structures, the first protective layer is electrically connected to the limiting structure, and the second protective layer is electrically connected to the first protective layer.

[0035] In this arrangement, punctures on both sides of the heating film can be detected, thereby improving the accuracy of the detection.

[0036] In a possible design, the first protective layer and the second protective layer are both aluminum plates.

[0037] In this arrangement, the aluminum plate has good electrical conductivity and is lightweight.

[0038] In a possible design, the battery further includes a flow channel plate connected to a side of the second protective layer away from the heating film, and the flow channel plate has a liquid flow channel.

[0039] In this arrangement, cooling or heating can be performed through the liquid flow channel, thereby further facilitating the adjustment of the ambient temperature of the battery cell.

[0040] In a possible design, the first protective layer is provided with an adhesive layer, and the first protective layer is bonded to the battery cell through the adhesive layer.

[0041] In this arrangement, the first protective layer is bonded and fixed to the battery cell, which provides high connection stability and is conducive to heat conduction.

[0042] In a possible design, the first protective layer is provided with an adhesive layer, and the first protective layer is bonded to the battery cell through the adhesive layer.

[0043] In this arrangement, the connection between the first protective layer and the battery cell is highly stable and has a large contact area, which is conducive to heat conduction.

[0044] In a possible design, a barrier structure is further provided on the side of the first protective layer facing the battery cell. The barrier structure forms a glue-containing area on the surface of the first protective layer, and the glue layer is provided in the glue-containing area.

[0045] In this arrangement, due to the arrangement of the barrier structure, it is convenient to limit the arrangement area of ​​the adhesive layer and the thickness of the adhesive layer.

[0046] In a possible design, the heating assembly further includes an insulating layer, which is disposed on a surface of the first protective layer facing the battery cell.

[0047] In this configuration, the provision of the insulating layer improves the insulation isolation performance between the first protective layer and the battery cell, and improves the protection performance for the battery cell.

[0048] In a second aspect, an electrical device is provided, which includes the battery provided by the above technical solution, and the battery is used to provide electrical energy.

[0049] Since the electrical device includes the above-mentioned battery, it has at least all the beneficial effects of the above-mentioned battery, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0051] Figure 1 This is a schematic structural diagram of an electrical device provided by an embodiment of the present application;

[0052] Figure 2 is an exploded schematic diagram of a battery provided by one embodiment of the present application;

[0053] Figure 3 This is a schematic diagram of the relative positions of a battery unit, a limiting structure, and a heating assembly provided by an embodiment of the present application;

[0054] Figure 4 is a schematic structural diagram of a heating assembly provided by an embodiment of the present application;

[0055] Figure 5 yes Figure 4 A schematic cross-sectional view of the battery along the AA direction;

[0056] Figure 6 is a schematic structural diagram of a heating assembly provided by one embodiment of the present application from another perspective;

[0057] Figure 7 This is a schematic diagram of the placement of a barrier structure and an adhesive layer on a conductive structure provided by an embodiment of the present application;

[0058] Figure 8 This is a schematic structural diagram of a heating film provided by an embodiment of the present application;

[0059] Figure 9 is an exploded schematic diagram of a heating assembly provided by one embodiment of the present application;

[0060] Figure 10 is a schematic diagram of the relative positions of a battery unit, a limiting structure, and a heating assembly provided by another embodiment of the present application;

[0061] Figure 11 is an exploded schematic diagram of an assembly of a battery cell, a limiting structure, and a heating component in a battery provided by another embodiment of the present application;

[0062] Figure 12 This is a cross-sectional view of a flow channel plate provided in another embodiment of the present application.

[0063] The reference numerals used in the above drawings are as follows:

[0064] 1-electrical device; 10-battery; 20-control mechanism; 30-driving mechanism; 100-battery unit; 200-housing; 300-cover; 110-limiting structure; 111-end plate; 112-metal belt; 113-elastic strap; 120-battery unit; 130-heating assembly; 131-first protective layer; 1311-assembly hole; 1312-insulating layer; 1313-glue layer; 1314-blocking structure; 132-heating film; 1321-connecting hole; 1322-connecting terminal; 1323-wire; 133-fixing part; 134-second protective layer; 135-flow channel plate; 136-liquid flow channel; 137-flow channel interface. DETAILED DESCRIPTION

[0065] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0066] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0067] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0068] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0070] As environmental pollution becomes increasingly serious, people's environmental awareness is gradually increasing. At the same time, the rapid rise of the new energy industry has provided a broad space for the application and development of secondary batteries. Batteries are widely used in many fields such as electric vehicles and aerospace.

[0071] In the related art, a battery includes a battery cell with a heating film disposed on the outside of the battery cell. The heating film is adhered to the outside of the battery cell and contacts the battery cell to facilitate heating. During use, the heating film may become debonded and separated from the battery cell, causing warping. The area where the heating film is separated from the battery cell is prone to temperature rise due to reduced heat dissipation performance. This elevated temperature of the heating film can easily burn structures near the heating film, thereby affecting the battery's operational stability. Furthermore, the battery cell is mounted within the housing, and the heating film is located outside the battery cell. Thus, the heating film is flanked by the battery cell and the housing. During the battery manufacturing process, particulate matter, such as metal particles, is easily generated. These particles may be located on the inner wall of the housing or the outer wall of the battery cell. When the heating film comes into contact with the particulate matter, the insulating portion of the heating film can be punctured by the particles, exposing the metal wires in the heating film or even causing some of the wires to break. The resistance of the punctured heating film increases, leading to a temperature increase. Furthermore, the punctured heating film affects the resistance distribution and heat transfer efficiency of the entire heating film, resulting in ineffective heat dissipation in the punctured area, which in turn causes a temperature increase. The increase in the temperature of the heating film can easily cause ablation of the structure near the heating film, thereby affecting the stability of the battery.

[0072] Based on the above considerations, an embodiment of the present application provides a battery, which includes a battery cell and a heating assembly. The heating assembly includes a heating film and plates clamped on both sides of the heating film, one of the plates is in contact with the battery cell, and the two plates clamp the heating film in the middle. On the one hand, this can slow down or even prevent the heating film from debonding or warping to a certain extent. On the other hand, it has a protective effect on both sides of the heating film, which can prevent the heating film from being punctured to a certain extent. From the above, it can be seen that the battery provided by the embodiment of the present application can, to a certain extent, solve the problem of abnormal heating of the heating film due to debonding or puncture, and the battery has strong stability in use.

[0073] The battery and electrical device provided in the embodiments of the present application are explained in detail below.

[0074] The battery disclosed in the embodiments of the present application can be used in electrical devices that use the battery as a power source or in various energy storage systems that use the battery as an energy storage element.

[0075] See also Figure 1For ease of description, this example uses a vehicle as the electrical device 1. The vehicle can be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an augmented-range vehicle, among others. The vehicle's interior can be equipped with a drive mechanism 30, a control mechanism 20, and a battery 10. The drive mechanism 30 can be a motor, for example, and the control mechanism 20 controls the battery 10 to power the drive mechanism 30. For example, the battery 10 can be located at the bottom, front, or rear of the vehicle. The battery 10 can be used to power other devices in the vehicle. For example, the battery 10 can serve as the vehicle's operating power source and be used for the vehicle's circuit system, such as for starting, navigation, and operating power requirements. In another example, the battery 10 can serve not only as the vehicle's operating power source, but also as the vehicle's driving power source, replacing or partially replacing fuel or natural gas for providing propulsion. The vehicle in this example uses the aforementioned battery 10. By improving the reliability of the battery 10, the reliability of the electrical device 1 can be improved.

[0076] like Figures 2 to 5 As shown, the battery 10 provided in this embodiment includes a battery cell 100 and a heating assembly 130. The battery cell 100 includes a plurality of battery cells 120 arranged in sequence. The heating assembly 130 is disposed in contact with the battery cell 100. The heating assembly 130 includes a first protective layer 131, a second protective layer 134, and a heating film 132. The first protective layer 131 is disposed in contact with the battery cell 100, and the second protective layer 134 is stacked on a side of the first protective layer 131 away from the battery cell 100. The heating film 132 is sandwiched between the first protective layer 131 and the second protective layer 134.

[0077] In the embodiment of the present application, the battery unit 100 includes a plurality of battery cells 120, and the plurality of battery cells 120 can be electrically connected in series, in parallel or in a mixed manner. Figure 2As shown, the battery 10 may include multiple battery cells 100 and multiple heating assemblies 130, with each battery cell 100 being provided with at least one heating assembly 130. Each heating assembly 130 may be connected separately to a power supply component, or the heating assemblies 130 may be connected in series and then connected to the power supply component. The heating films 132 are provided with positive and negative terminals, and the positive and negative terminals of the heating films 132 may be connected in series. For example, the positive terminal of a first heating film 132 may be electrically connected to the negative terminal of a second heating film 132, and the positive terminal of the second heating film 132 may be electrically connected to the negative terminal of a third heating film 132. In this case, the three heating films 132 are connected in series, that is, the three heating assemblies 130 are connected in series. The negative terminal of the first heating film 132 may be electrically connected to the negative electrode of the power supply component, and the positive terminal of the third heating film 132 may be electrically connected to the positive electrode of the power supply component. In this case, the three heating assemblies 130 are connected in series to the power supply component. The power supply component can adopt the external structure of battery 10, or the power supply component can adopt the main circuit in battery 10, the main circuit includes a main positive terminal and a main negative terminal, the positive terminal of the heating film 132 is electrically connected to the main positive terminal, and the negative terminal of the heating film 132 is electrically connected to the main negative terminal.

[0078] In the embodiments of the present application, the battery cell 120 may be a secondary battery. A secondary battery is a battery cell that can be recharged to activate the active material after discharge and continue to be used. The battery cell may 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-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, or the like, and the embodiments of the present application are not limited thereto.

[0079] The battery cell 120 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell 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.

[0080] In one example, Figure 3 As shown, a plurality of battery cells 120 are arranged along a first direction, and the heating assembly 130 is located on one side of the second direction of the plurality of battery cells 120, and the first direction is perpendicular to the second direction, so that the first protective layer 131 can contact the plurality of battery cells 120 respectively. Exemplarily, the battery cell 120 may include an end face defined by a lengthwise edge and a widthwise edge, a small face defined by a widthwise edge and a heightwise edge, and a large face defined by a lengthwise edge and a heightwise edge. The heating assembly 130 may be arranged outside the large face, outside the small face, or outside the end face of the battery cell 120. Figure 3In the embodiment, the width direction of the battery cell 120 is the first direction, the length direction of the battery cell 120 is the second direction, the large surfaces of adjacent battery cells 120 face each other, and one small surface of each battery cell 120 is in contact with the first protective layer 131 in the heating component 130.

[0081] like Figure 3 As shown, in this embodiment, the length direction of the battery cell 120 is the Y-axis direction, the width direction of the battery cell 120 is the X-axis direction, and the height direction of the battery cell 120 is the Z-axis direction.

[0082] The heating assembly 130 includes a first protective layer 131, a second protective layer 134, and a heating film 132. Both the first and second protective layers 131, 134 are plate-like structures and can be connected by welding, bonding, snapping, screwing, or riveting. The heating film 132 is located between the first and second protective layers 131, 134. The first protective layer 131 is located on the side of the heating film 132 closer to the battery cells 120, while the second protective layer 134 is located on the side of the heating film 132 farther from the battery cells 120. The heat generated by the heating film 132 is transferred to the battery cells 120 via the first protective layer 131. During assembly of the heating assembly 130, the heating film 132 can be first attached to one of the first and second protective layers 131, 134, and then the first and second protective layers 131, 134 can be connected. The heating film 132 may be an electric heating structure. For example, the heating film 132 may include a heating portion and an insulating portion, and the insulating portion is coated on the outside of the heating portion. The heating portion may include a heating wire, such as a metal wire, which heats up when powered, thereby being used to heat the battery cell 120. In one example, the heating portion includes a heating layer composed of heating wires, and insulating portions are provided on both sides of the heating layer. The insulating portions coat the heating layer in the middle, thereby insulating the heating portion. The heating film 132 may also include a wire 1323 and a connecting terminal 1322 (such as Figure 3 and Figure 4 As shown), the wire 1323 is electrically connected to the heating portion, and the wire 1323 extends outside the area where the first protective layer 131 and the second protective layer 134 are opposite to each other and is electrically connected to the connection terminal 1322, which is used to connect to the power supply component to supply power to the heating portion. Figure 3 and Figure 4 As shown, the heating portion is connected to two wires 1323 , and the two wires 1323 are respectively connected to connection terminals 1322 , one of the connection terminals 1322 is a positive terminal, and the other connection terminal 1322 is a negative terminal.

[0083] In the battery 10 provided in this embodiment, the first protective layer 131 and the second protective layer 134 respectively play a role in limiting and fixing the heating film 132 on both sides of the heating film 132, thereby preventing the heating film 132 from warping due to debonding to a certain extent. The heat of the heating film 132 can be dissipated through the first protective layer 131 and the second protective layer 134, which can slow down the occurrence of local abnormal temperature rise of the heating film 132 to a certain extent, thereby improving the stability of the battery 10. Since the heating film 132 is located between the first protective layer 131 and the second protective layer 134, the first protective layer 131 and the second protective layer 134 respectively protect the heating film 132 from both sides of the heating film 132, thereby preventing the heating film 132 from being scratched or punctured by foreign objects to a certain extent.

[0084] Please continue reading Figure 2 and Figure 3 In some embodiments, the battery 10 further includes a limiting structure 110 , which is used to limit and fix the battery cell 100 , and at least one of the first protective layer 131 and the second protective layer 134 is connected to the limiting structure 110 .

[0085] The battery unit 100 includes multiple battery cells 120, and the limiting structure 110 is used to limit and fix the battery unit 100. The limiting structure 110 allows the multiple battery cells 120 in the battery unit 100 to be relatively limited and fixed, so that the multiple battery cells 120 are limited as an integral structure, which facilitates the common movement of all battery cells 120 in the battery unit 100, facilitates the movement of the battery unit 100, and facilitates the installation of the battery unit 100 in the electrical device.

[0086] At least one of the first protective layer 131 and the second protective layer 134 is connected to the limiting structure 110, that is, only the first protective layer 131 may be connected to the limiting structure 110, and the second protective layer 134 is not directly connected to the limiting structure 110, but the first protective layer 131 and the second protective layer 134 may be connected so that the second protective layer 134 is indirectly connected to the limiting structure 110 through the first protective layer 131; or, only the second protective layer 134 may be connected to the limiting structure 110, and the first protective layer 131 and the limiting structure 110 are not directly connected, but the first protective layer 131 and the second protective layer 134 may be connected so that the first protective layer 131 is indirectly connected to the limiting structure 110 through the second protective layer 134; or, both the first protective layer 131 and the second protective layer 134 are connected to the limiting structure 110.

[0087] Because the limiting structure 110 is used to limit and fix the battery cell 100, the limiting structure 110 and the battery cell 100 are relatively fixed. The limiting structure 110 can limit and fix the battery cell 100 through bonding, clamping, interference fit assembly, etc. Since the first protective layer 131, the second protective layer 134, and the heating film 132 are relatively fixed, at least one of the first protective layer 131 and the second protective layer 134 is connected to the limiting structure 110, which can ensure that the first protective layer 131 and the battery cell 100 are relatively fixed, thereby improving the contact stability between the first protective layer 131 and the battery cell 100.

[0088] In one possible design, Figure 3 As shown, the limiting structure 110 includes two end plates 111 spaced apart along the first direction. The two end plates 111 are respectively fixed on both sides of the battery cell 100 in the first direction, and at least one of the first protective layer 131 and the second protective layer 134 is connected to the two end plates 111.

[0089] At least one of the first protective layer 131 and the second protective layer 134 is connected to the two end plates 111, that is, only the first protective layer 131 may be connected to the two end plates 111, and the second protective layer 134 is not directly connected to the two end plates 111, but the first protective layer 131 and the second protective layer 134 may be connected so that the second protective layer 134 is indirectly connected to the two end plates 111 through the first protective layer 131; or, only the second protective layer 134 may be connected to the two end plates 111, and the first protective layer 131 and the two end plates 111 are not directly connected, but the first protective layer 131 and the second protective layer 134 may be connected so that the first protective layer 131 and the two end plates 111 are indirectly connected through the second protective layer 134; or, both the first protective layer 131 and the second protective layer 134 are connected to the two end plates 111.

[0090] The two end plates 111 respectively limit the position of the multiple battery cells 120 in the battery unit 100 at both ends of the battery cell 120 in the first direction. The battery 10 provided in this embodiment can be a module-free battery (CTP, Cell To Pack). In the module-free battery 10, the battery 10 includes a case 200, in which multiple battery cells 100 are arranged. The limiting structure 110 is used to limit and fix the multiple battery cells 120 into an integral structure, and the limiting structure 110 is fixedly connected to the case 200, so that the multiple battery cells 120 in the battery unit 100 are fixed in the case 200 through the limiting structure 110. The battery 10 may also include a cover 300, which covers the case 200, and a space for accommodating the battery cells 100 is formed between the case 200 and the cover 300. For example, the limiting structure 110 includes two end plates 111, and there is no bottom plate or top plate between the two end plates 111. The two end plates 111 and the plurality of battery cells 120 can be fixedly connected by a binding structure. In a specific example, Figure 3 As shown, the two end plates 111 are respectively located on both sides of the multiple battery cells 120 in the first direction, and the two end plates 111 and the multiple battery cells 120 are fixedly connected by two binding structures. The binding structure is arranged around the periphery of the two end plates 111 and the multiple battery cells 120, and the two binding structures are spaced apart in the height direction (Z-axis direction) of the battery 10. The binding structure can be a metal belt 112 or an elastic band 113. For example, one of the binding structures is a metal belt 112, such as a steel belt, and the other binding structure is an elastic band 113.

[0091] In this arrangement, since multiple battery cells 120 are arranged along the first direction, and at least one of the first protective layer 131 and the second protective layer 134 is connected to the end plate 111, the connection area between the heating component 130 and the limiting structure 110 can be increased, thereby improving the contact stability between the first protective layer 131 and the battery cell 100.

[0092] like Figure 3 As shown, in one example, the first protective layer 131 is connected to the two end plates 111 at both ends in the first direction, and the second protective layer 134 is connected to the first protective layer 131 .

[0093] In this arrangement, since the first protective layer 131 is arranged in contact with the battery cell 100 and the second protective layer 134 is located on the side of the first protective layer 131 that is farther away from the battery cell 100 in the second direction, the distance between the first protective layer 131 and the battery cell 100 is closer in the second direction. The end plates 111 are arranged on both sides of the battery cell 100 in the first direction, so in the second direction, the distance between the first protective layer 131 and the end plates 111 is smaller than the distance between the first protective layer 131 and the end plates 111. As can be seen from the above, the distance between the first protective layer 131 and the end plates 111 is relatively closer, which facilitates the connection operation. Since the second protective layer 134 is connected to the first protective layer 131, after the heating component 130 is assembled, the first protective layer 131 can be connected to the end plate 111, so that the first protective layer 131, the second protective layer 134 and the heating film 132 in the heating component 130 are all limited and fixed on one side of the battery cell 100, which facilitates the assembly of the battery cell 100.

[0094] like Figure 3 、 Figure 4 and 6 As shown, in a possible design, in the first direction, the length of the first protective layer 131 is greater than the length of the second protective layer 134, and the length of the second protective layer 134 is greater than the length of the heating film 132. Figure 3 、 Figure 4 and Figure 6 In the figure, because the length of the second protective layer 134 is greater than that of the heating film 132, the second protective layer 134 blocks the heating film 132, and the heating film 132 is not shown. Because the length of the second protective layer 134 is less than that of the first protective layer 131, the second protective layer 134 covers a portion of the first protective layer 131, while a portion of the first protective layer 131 is exposed from the second protective layer 134.

[0095] In this setting, since the length of the second protective layer 134 is greater than the length of the heating film 132, it is easy to fix the heating film 132 between the first protective layer 131 and the second protective layer 134. Since the length of the first protective layer 131 is greater than the length of the second protective layer 134, it is easy to fix the first protective layer 131 to the end plate 111.

[0096] In some examples, such as Figure 6As shown, the second protective layer 134 is arranged at a relatively central position of the first protective layer 131 in the first direction, so that part of the first protective layer 131 at both ends in the first direction has an area not covered by the second protective layer 134, and the first protective layer 131 at both ends in the first direction is provided with assembly holes 1311 in the area not covered by the second protective layer 134, so as to be riveted to the two end plates 111 respectively through the conductive fixing parts 133.

[0097] like Figure 3 、 Figure 6 and Figure 7 As shown, in one possible design, the outer peripheral edge of the second protective layer 134 is connected to the first protective layer 131. The edge area of ​​the projection of the second protective layer 134 in its own thickness direction (the second direction) is the outer peripheral edge of the second protective layer 134. For example, when the second protective layer 134 is a circular plate-like structure, the area of ​​the second protective layer 134 away from the center of the circle is the outer peripheral edge of the second protective layer 134. When the second protective layer 134 is a rectangular plate-like structure, the outer peripheral edge of the second protective layer 134 includes the two side edges of the second protective layer 134 in the first direction and the two side edges in the second direction.

[0098] Since the heating film 132 is located between the first protective layer 131 and the second protective layer 134, and the circumferential edge of the second protective layer 134 is connected to the first protective layer 131, a relatively sealed chamber is formed between the second protective layer 134 and the first protective layer 131. The heating film 132 is located in the relatively sealed chamber, the connection area between the first protective layer 131 and the second protective layer 134 is relatively large, the connection stability is relatively strong, and the limiting effect on the heating film 132 is relatively good.

[0099] The first protective layer 131 and the second protective layer 134 may be connected by bonding, riveting or welding.

[0100] In some examples, the first protective layer and the second protective layer are fixed by welding.

[0101] The first protective layer 131 and the second protective layer 134 are made of the same conductive material. The outer edge of the second protective layer 134 is welded to the first protective layer 131, thereby connecting the outer edge of the second protective layer 134 to the first protective layer 131. In this arrangement, the connection area between the second protective layer 134 and the first protective layer 131 is relatively larger, and the connection stability is improved. During the welding process of the first and second protective layers 131 and 134, the clamping force generated by the welding allows the first and second protective layers 131 and 134 to clamp the heating film 132 more tightly, thereby effectively limiting and fixing the heating film 132.

[0102] In one possible design, Figure 8As shown, the heating film 132 is provided with a connection hole 1321 , which penetrates the heating film 132 along the thickness direction of the heating film 132 , and the first protective layer 131 is connected to the second protective layer 134 via a connection structure penetrating the connection hole 1321 .

[0103] After the heating assembly 130 is connected to the battery cell 120, the thickness direction of the heating film 132 is the second direction. The first protective layer 131 and the second protective layer 134 are connected at the connection hole 1321 by a connection structure. The first protective layer 131 and the second protective layer 134 can be connected at the connection hole 1321 by plugging, welding, or riveting. When the first protective layer 131 and the second protective layer 134 are plugged in at the connection hole 1321, the connection structure includes a protrusion. A protrusion is provided in the first protective layer 131, and a groove is provided in the second protective layer 134. The protrusion and the groove are both opposite to the connection hole 1321. The protrusion passes through the connection hole 1321 and extends into the groove, so that the first protective layer 131 and the second protective layer 134 are relatively limited and plugged in at the connection hole 1321. The protrusion and the groove can be a transition fit connection. When the first protective layer 131 and the second protective layer 134 are welded at the connection hole 1321, the connection structure is the portion of the first protective layer 131 that melts during the welding process and extends into the connection hole 1321. Spot welding can be performed at the locations where the first and second protective layers 131 and 134 are opposite to the connection hole 1321, thereby welding portions of the first and second protective layers 131 and 134 within the connection hole 1321. When the first and second protective layers 131 and 134 are riveted together at the connection hole 1321, the connection structure is a rivet. The rivet can be installed on a side of the first or second protective layer 131 or 134 away from the other, passing through the connection hole 1321 and extending into the other of the first and second protective layers 131 and 134.

[0104] In this arrangement, the connection area between the first protective layer 131 and the second protective layer 134 is larger, and the connection stability is stronger. At the same time, the connection structure between the first protective layer 131 and the second protective layer 134 is provided within the connection hole 1321, thereby better limiting the position of the heating film 132 and improving the fixing stability of the heating film 132 between the first protective layer 131 and the second protective layer 134.

[0105] In one possible design, Figure 6 、 Figure 7 and Figure 9 As shown, the first protective layer 131 is provided with assembly holes 1311 at both ends in the first direction. The battery 10 further includes a fixing member 133 , which passes through the assembly holes 1311 . The first protective layer 131 is connected to the two end plates 111 respectively through the fixing member 133 .

[0106] like Figure 6As shown, the length direction of the first protective layer 131 is the X-axis direction, the width direction of the first protective layer 131 is the Z-axis direction, and the thickness direction of the first protective layer 131 is the Y-axis direction. The assembly hole 1311 penetrates the first protective layer 131 along the thickness direction of the first protective layer 131. Multiple assembly holes 1311 can be provided at both ends of the length direction of the first protective layer 131. The number of assembly holes 1311 can be set according to factors such as the weight of the first protective layer 131 and the width of the first protective layer 131. If the weight of the first protective layer 131 is large and / or the width of the first protective layer 131 is large, a larger number of assembly holes 1311 can be provided to fix the first protective layer 131 and the end plate 111 via a larger number of fixing members 133.

[0107] In this arrangement, the connection between the first protective layer 131 and the end plate 111 is simple, easy to operate, and has high connection efficiency.

[0108] In a possible design, at least one of the first protective layer 131 and the second protective layer 134 is a conductive structure and is electrically connected to the limiting structure 110 . The limiting structure 110 is used to connect to the insulation detection module.

[0109] At least one of the first protective layer 131 and the second protective layer 134 is electrically connected to the limiting structure 110. That is, only the first protective layer 131 may be a conductive structure and electrically connected to the limiting structure 110, while the second protective layer 134 is not electrically connected to the limiting structure 110. Alternatively, only the second protective layer 134 may be a conductive structure and electrically connected to the limiting structure 110, while the first protective layer 131 is not electrically connected to the limiting structure 110. Alternatively, both the first protective layer 131 and the second protective layer 134 are conductive structures and electrically connected to the limiting structure 110. In the case where one of the first protective layer 131 and the second protective layer 134 is electrically connected to the limiting structure 110 and the other is not electrically connected to the limiting structure 110, in some embodiments, the one electrically connected to the limiting structure 110 may be a conductive structure made of a conductive material, while the one not electrically connected to the limiting structure 110 may be made of an insulating material. In the case where both the first protective layer 131 and the second protective layer 134 are electrically connected to the limiting structure 110, in some embodiments, the first protective layer 131 and the second protective layer 134 can be conductive structures made of conductive materials, and the first protective layer 131 and the second protective layer 134 can be directly electrically connected to the limiting structure 110, and the first protective layer 131 and the second protective layer 134 are connected. Alternatively, in other embodiments, the first protective layer 131 and the second protective layer 134 are electrically connected, and one of the first protective layer 131 and the second protective layer 134 is electrically connected to the limiting structure 110.

[0110] The limiting structure 110 is connected to an insulation detection module, which may be a module possessed by the battery 10 itself or an external module. Exemplarily, the battery 10 includes an insulation detection module, and the limiting structure 110 is connected to the insulation detection module. In another example, the battery 10 is applied to an electrical device 1, and the electrical device 1 includes an insulation detection module, and the limiting structure 110 is connected to the insulation detection module. The insulation detection module is used to detect the insulation performance of the limiting structure 110. For example, the insulation detection module can determine whether the insulation performance of the limiting structure 110 is abnormal by detecting whether the voltage of the limiting structure 110 is within the voltage range of the limiting structure 110 when in a normal insulation state, or detecting whether the current of the limiting structure 110 is within the current range of the limiting structure 110 when in a normal insulation state, or detecting whether the insulation resistance of the limiting structure 110 is within the insulation resistance range of the limiting structure 110 when in a normal insulation state.

[0111] In the battery 10 provided in the above embodiment, even if particles fall between the first protective layer 131 and the second protective layer 134 and puncture the heating film 132 during the assembly process, after the heating film 132 is energized, the current flows to the limiting structure 110 through one of the first protective layer 131 and the second protective layer 134 that is electrically connected to the limiting structure 110. The insulation detection module can detect the insulation performance of the limiting structure 110, so that it can be detected in time when the heating film 132 is punctured, so as to timely deal with the problem of the heating film 132 being punctured, thereby improving the stability of the battery 10.

[0112] In a possible design, the battery 10 further includes a battery management device, which includes an insulation detection module. The insulation detection module is connected to the limiting structure 110 and is used to detect the insulation performance of the limiting structure 110.

[0113] The battery management system (BMS) is used to monitor and manage the status and performance of the battery 10. For example, the BMS can be used to manage the charge and discharge status of each battery cell 120 and detect the voltage, current, and other characteristics of each battery cell 120. The BMS includes an insulation detection module, which is connected to the limiting mechanism. In this configuration, the insulation detection module in the BMS within the battery 10 detects the insulation performance of the limiting structure 110, eliminating the need for an external insulation detection module. In one example, the BMS also includes a control module and an alarm module. Both the alarm module and the insulation detection module are connected to the control module. If the insulation detection module detects an abnormal insulation performance of the limiting structure 110, the control module controls the alarm module to issue an alarm. For example, the alarm module can include a buzzer, a display screen, or a warning light, among other components for generating an alarm. The buzzer can sound an alarm, the display screen can display text or images indicating a warning message, and the warning light can illuminate or flash to issue an alarm. In other examples, the battery management device also includes a control module, which is connected to the heating film 132 and the insulation detection module respectively. When the insulation detection module detects that the insulation performance of the limiting structure 110 is abnormal, the control module controls the heating film 132 to stop heating.

[0114] In a possible design, the first protective layer 131 and the second protective layer 134 are both conductive structures. The first protective layer 131 is electrically connected to the limiting structure 110 , and the second protective layer 134 is electrically connected to the first protective layer 131 .

[0115] The first protective layer 131 and the second protective layer 134 can both be plate-like structures made of conductive materials. The first protective layer 131 and the second protective layer 134 can be made of the same conductive material or different conductive materials. The first protective layer 131 and the second protective layer 134 are electrically connected, so that the potentials of the first protective layer 131 and the second protective layer 134 are equal, and current can flow between the first protective layer 131 and the second protective layer 134. Since the first protective layer 131 is electrically connected to the limiting structure 110, the first protective layer 131 is directly electrically connected to the limiting structure 110, and the second protective layer 134 is indirectly electrically connected to the limiting structure 110 through the first protective layer 131, that is, the first protective layer 131 and the second protective layer 134 are both electrically connected to the limiting structure 110. With this arrangement, if either side of the heating film 132 is punctured, the heating portion of the heating film 132 will contact one of the first protective layer 131 and the second protective layer 134. Consequently, when the heating film 132 is energized, current can flow through the first protective layer 131 to the retaining structure 110, allowing the insulation detection module to promptly detect any insulation anomalies in the retaining structure 110, thereby facilitating the detection of punctures in the heating film 132. In this arrangement, even if the heating film 132 is not completely punctured, it can still be detected.

[0116] In some examples, the first protective layer 131 and the second protective layer 134 are both aluminum plates. Aluminum plates are made of metal aluminum, which has good electrical conductivity, relatively high structural strength and relatively low weight, and provides stronger protection for the heating film 132 and the battery cell 120.

[0117] In one possible design, Figure 3 As shown, when the limiting structure 110 includes two end plates 111 spaced apart along the first direction, the two end plates 111 are both connected to the insulation detection module, and the first protective layer 131 is electrically connected to the two end plates 111 respectively.

[0118] Both end plates 111 are connected to the insulation detection module. The two end plates 111 can be connected to the insulation detection module separately, or the two end plates 111 are electrically connected, and one of the end plates 111 is connected to the insulation detection module, so that any abnormal insulation performance of any end plate 111 of the two end plates 111 can be detected by the insulation detection module.

[0119] In this configuration, both ends of the first protective layer 131 are electrically connected to the end plate 111, thereby increasing the electrical connection area between the first protective layer 131 and the limiting structure 110. Consequently, if the heating film 132 is punctured, the current from the heating film 132 can be transmitted to the end plate 111 through the electrical connection area between the first protective layer 131 and the limiting structure 110, allowing insulation performance testing to be performed by an insulation testing module electrically connected to the end plate 111.

[0120] like Figure 3 、 Figure 6 and Figure 7 As shown, in one possible design, the outer peripheral edge of the second protective layer 134 is electrically connected to the first protective layer 131. In this arrangement, the second protective layer 134 is electrically connected to the first protective layer 131, and the first protective layer 131 is electrically connected to the limiting structure 110 (e.g., the end plate 111), thereby electrically connecting the second protective layer 134 to the limiting structure 110 (e.g., the end plate 111). Since the first protective layer 131 and the second protective layer 134 are located on either side of the heating film 132, no matter which side of the heating film 132 is punctured, the heating portion of the heating film 132 will contact one of the first protective layer 131 and the second protective layer 134. When the heating film 132 is energized, current can flow to the limiting structure 110 (e.g., the end plate 111), allowing the insulation detection module to promptly detect abnormal insulation performance of the limiting structure 110, thereby facilitating the detection of punctures in the heating film 132. In this arrangement, even if the heating film 132 is not completely pierced, it can still be detected.

[0121] In one example, the second protective layer 134 is a rectangular plate, and both side edges of the second protective layer 134 in the length direction and both side edges of the second protective layer 134 in the width direction are electrically connected to the first protective layer 131 respectively.

[0122] The first protective layer 131 and the second protective layer 134 can be connected by riveting or welding. In this way, the first protective layer 131 and the second protective layer 134 are relatively fixedly connected and can also be electrically connected.

[0123] like Figure 3 、 Figure 5 and Figure 7 As shown, in a possible design, the first protective layer 131 is provided with an adhesive layer 1313 , and the first protective layer 131 is adhered to the battery cell 120 through the adhesive layer 1313 .

[0124] The adhesive layer 1313 can be an adhesive structure such as glue, adhesive paper or adhesive tape. In this configuration, the connection area between the first protective layer 131 and the battery cell 120 is relatively large, the connection stability is high, and it is conducive to heat conduction between the first protective layer 131 and the battery cell 120.

[0125] like Figure 3 、 Figures 5 to 7 As shown, in one example, a barrier structure 1314 is provided on the side of the first protective layer 131 facing the battery cell 120 , a glue holding area is formed between the barrier structure 1314 and the first protective layer 131 , and the glue layer 1313 is provided in the glue holding area.

[0126] The barrier structure 1314 is a closed annular structure. A glue-retaining area is formed between the barrier structure 1314 and the first protective layer 131. Adhesive is provided within the adhesive-retaining area, forming an adhesive layer 1313. The first protective layer 131 is bonded to the battery cell 120 via the adhesive layer 1313. By controlling the size of the barrier structure 1314, the size of the coating area of ​​the adhesive layer 1313 can be controlled. By controlling the thickness of the barrier structure 1314, the thickness of the adhesive layer 1313 can be controlled to a certain extent, allowing the adhesive layer 1313 to be formed to a predetermined thickness.

[0127] In one possible design, barrier structure 1314 is a flexible structure. Made of a flexible material, such as foam, rubber, or silicone, barrier structure 1314 possesses a certain degree of elastic deformation, providing a buffering effect between first protective layer 131 and battery cell 120.

[0128] In some embodiments, a portion of the barrier structure 1314 is located outside the width of the plate. Because the barrier structure 1314 is located outside the width of the plate, it covers the width edge of the plate. Since the barrier structure 1314 is located between the plate and the battery cells 120, it acts as a buffer between the width edge of the plate and the battery cells 120, preventing direct contact between the width edge of the plate and the battery cells 120 and thus protecting the battery cells 120.

[0129] In this arrangement, the connection between the first protective layer 131 and the end plate 111 is simple, easy to operate, and has high connection efficiency.

[0130] In one possible design, Figure 5 As shown, the heating assembly 130 further includes an insulating layer 1312 , which is disposed on a surface of the first protective layer 131 facing the battery cell 120 .

[0131] In some embodiments, the insulating layer 1312 can be formed by spraying an insulating varnish on the surface of the first protective layer 131 facing the battery cell 120 in an area opposite the battery cell 120 to form the insulating layer 1312. Spraying the insulating varnish provides a stable connection between the insulating layer 1312 and the first protective layer 131. In other embodiments, the insulating layer 1312 can be a layered structure made of an insulating material and fixed to the area of ​​the first protective layer 131 facing the battery cell 120. The insulating layer 1312 and the first protective layer 131 can be bonded.

[0132] In the first direction, the length of the insulating layer 1312 is shorter than that of the first protective layer 131. The insulating layer 1312 covers part of the side of the first protective layer 131 facing the battery cell 120. The uncovered area is electrically connected to the limiting structure 110.

[0133] In this configuration, the provision of the insulating layer 1312 improves the insulation isolation performance between the first protection layer 131 and the battery cell 120 , and improves the protection performance for the battery cell 120 .

[0134] like Figures 10 to 12 As shown, in a possible design, the battery 10 further includes a flow channel plate 135 . The flow channel plate 135 is connected to a side of the second protective layer 134 away from the heating film 132 . The flow channel plate 135 has a liquid flow channel 136 .

[0135] The liquid flow channel 136 is used to hold liquid. Liquid introduced into the liquid flow channel 136 can remove heat from the battery cells 120 through the flowing liquid, thereby improving the heat dissipation efficiency of the battery cells 120. Introducing a lower-temperature liquid into the liquid flow channel 136 can cool the battery cells 120, while introducing a higher-temperature liquid into the liquid flow channel 136 can heat the battery cells 120. If the battery cells 120 require heating, they can be heated simultaneously by the heating film 132 and by introducing a higher-temperature liquid into the liquid flow channel 136, resulting in higher heating efficiency. If the battery cells 120 require cooling, the heating film 132 can be placed in an inoperative state, and the battery cells 120 can be cooled by introducing a lower-temperature liquid into the liquid flow channel 136.

[0136] In this configuration, cooling or heating can be performed through the liquid flow channel 136 , thereby further facilitating adjustment of the ambient temperature of the battery cell 120 .

[0137] like Figure 10 and Figure 11As shown, in some embodiments, a flow channel interface 137 is provided on the flow channel plate 135, and the number of the flow channel interfaces 137 is at least two, wherein at least one flow channel interface 137 is used to introduce liquid into the liquid flow channel 136, and at least one flow channel interface 137 is used to discharge the liquid in the liquid flow channel 136.

[0138] like Figure 12 As shown, in some examples, a recess is formed on the side of the flow channel plate 135 facing the second protective layer 134, forming a liquid flow channel 136. The opening of the liquid flow channel 136 faces the second protective layer 134. After the flow channel plate 135 is connected to the second protective layer 134, the second protective layer 134 covers the opening of the liquid flow channel 136 facing the second protective layer 134. In this arrangement, the thickness of the flow channel plate 135 is relatively smaller and the weight is relatively lighter. The liquid flow channel 136 can be formed by stamping or cutting on the second protective layer 134. In some examples, please continue to refer to Figure 12 The liquid flow channel 136 is formed by stamping on the second protective layer 134, that is, a convex portion is formed on the second protective layer 134 on the other side opposite to the liquid flow channel 136. In this arrangement, the weight of the flow channel plate 135 is further reduced.

[0139] In a specific implementation of the present application, the battery 10 includes a limiting structure 110, a battery cell 120 and a heating assembly 130. The limiting structure 110 includes two end plates 111 arranged at relative intervals in a first direction. The number of battery cells 120 is multiple, and the multiple battery cells 120 are arranged in sequence along the first direction. The two end plates 111 are respectively located on both sides of the multiple battery cells 120 in the first direction. The heating assembly 130 includes a first protective layer 131, a second protective layer 134 and a heating film 132. The first protective layer 131 and the second protective layer 134 are both aluminum plates. In the first direction, the length of the first protective layer 131 is greater than the length of the second protective layer 134, and the length of the second protective layer 134 is greater than the length of the heating film 132. The heating film 132 is adhered to the first protective layer 131, and the two side edges of the heating film 132 in the first direction are respectively at a certain distance from the two side edges of the first protective layer 131. The peripheral edge of the second protective layer 134 is welded to the first protective layer 131, so that the heating film 132 is clamped and fixed between the first protective layer 131 and the second protective layer 134. The first protective layer 131 and the second protective layer 134 are respectively in contact with the two sides of the heating film 132 in the thickness direction. The second protective layer 134 covers a partial area in the middle of the first protective layer 131. There are partial areas at both ends of the first protective layer 131 in the first direction that are not covered by the second protective layer 134. Assembly holes 1311 are provided in these partial areas. The assembly holes 1311 are used for the fixing parts 133 to pass through. The first protective layer 131 is fixed and electrically connected to the corresponding end plates 111 on both sides of the first direction through the fixing parts 133. The fixing parts 133 are rivets.

[0140] The embodiment of the present application further provides an electric device 1, which includes a battery 10 provided by the above technical solution, and the battery 10 is used to provide electrical energy.

[0141] The electric device 1 provided in the embodiment of the present application may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: include: A battery unit, comprising a plurality of battery cells arranged in sequence; a heating assembly, disposed in contact with the battery cell; Wherein, the heating component comprises: a first protective layer, disposed in contact with the battery cell; a second protective layer, stacked on a side of the first protective layer away from the battery cell; The heating film is sandwiched between the first protective layer and the second protective layer.

2. The battery according to claim 1, wherein The battery further includes a limiting structure, which is used to limit and fix the battery unit, and at least one of the first protective layer and the second protective layer is connected to the limiting structure.

3. The battery according to claim 2, wherein The limiting structure includes two end plates spaced apart along a first direction, the two end plates are respectively fixed on both sides of the battery unit in the first direction, and at least one of the first protective layer and the second protective layer is connected to the two end plates.

4. The battery according to claim 3, wherein The first protective layer is connected to the two end plates at both ends in the first direction, and the second protective layer is connected to the first protective layer.

5. The battery according to claim 4, wherein In the first direction, the length of the first protective layer is greater than that of the second protective layer, and the length of the second protective layer is greater than that of the heating film.

6. The battery according to claim 5, wherein The first protective layer is provided with assembly holes at both ends in the first direction. The battery further includes a fixing member passing through the assembly holes. The first protective layer is connected to the two end plates respectively through the fixing member.

7. The battery according to claim 4, wherein The outer peripheral edge of the second protective layer is connected to the first protective layer.

8. The battery according to claim 4, wherein The first protective layer and the second protective layer are fixed by welding.

9. The battery according to claim 4, wherein The heating film is provided with a connection hole, and the connection hole penetrates the heating film along the thickness direction of the heating film. The first protective layer is connected to the second protective layer via a connection structure penetrating the connection hole.

10. The battery according to any one of claims 2 to 9, characterized in that At least one of the first protective layer and the second protective layer is a conductive structure and is electrically connected to the limiting structure, and the limiting structure is used to connect to the insulation detection module.

11. The battery according to claim 10, wherein The battery further includes a battery management device, and the battery management device includes the insulation detection module.

12. The battery according to claim 10, wherein The first protective layer and the second protective layer are both conductive structures. The first protective layer is electrically connected to the limiting structure, and the second protective layer is electrically connected to the first protective layer.

13. The battery according to claim 12, wherein The first protective layer and the second protective layer are both aluminum plates.

14. The battery according to any one of claims 1 to 9, characterized in that The battery further includes a flow channel plate connected to a side of the second protective layer away from the heating film, and the flow channel plate of the second protective layer has a liquid flow channel.

15. The battery according to any one of claims 1 to 9, characterized in that The first protective layer is provided with an adhesive layer, and the first protective layer is adhered to the battery cell through the adhesive layer.

16. The battery according to claim 15, wherein A barrier structure is further provided on a side of the first protective layer facing the battery cell. The barrier structure forms a glue-containing area on the surface of the first protective layer, and the glue layer is provided in the glue-containing area.

17. The battery according to any one of claims 1 to 9, characterized in that The heating assembly further includes an insulating layer, which is disposed on a surface of the first protective layer facing the battery cell.

18. An electrical device, characterized in that: The battery according to any one of claims 1 to 17 is used to provide electrical energy.

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