CN216488266U - Heating film, battery module comprising same, battery pack and electric device - Google Patents
Heating film, battery module comprising same, battery pack and electric device Download PDFInfo
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- CN216488266U CN216488266U CN202122758262.2U CN202122758262U CN216488266U CN 216488266 U CN216488266 U CN 216488266U CN 202122758262 U CN202122758262 U CN 202122758262U CN 216488266 U CN216488266 U CN 216488266U
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The embodiment of the application provides a heating film, a battery module comprising the heating film, a battery pack and an electric device, wherein the heating film comprises an electric heating element, a detection conductive element and two layers of diaphragms; the electric heating element and the detection conductive element are positioned between the two layers of membranes; the detection conductive element surrounds the electric heating element and is positioned between the electric heating element and the edge of the diaphragm; the strength of the sensing conductive element is less than the strength of the electrical heating element. The heating film that this application embodiment provided, because the intensity that detects conductive element is less than electric heating element's intensity, when diaphragm and/or electric heating element take place the breakage but not complete when breaking, detect conductive element and can break earlier to through detecting this break-make that detects conductive element, can survey whether diaphragm and/or electric heating element take place the breakage.
Description
Technical Field
The present application relates to the field of battery technologies, and in particular, to a heating film, a battery module including the heating film, a battery pack including the heating film, and an electric device including the battery module.
Background
Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and electric vehicles become important components of the sustainable development of the automobile industry due to the advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.
When the battery system of the new energy automobile meets the low external environment temperature, the working efficiency is low, so that the battery needs to be heated by adopting the heating film to ensure that the self temperature of the battery can reach the normal charging and discharging level. However, the heating film is easy to be damaged, but at present, the damage of the heating film is difficult to be effectively detected, so that the battery system has potential safety hazard when in use.
SUMMERY OF THE UTILITY MODEL
An object of the embodiments of the present application is to provide a heating film, a battery module including the same, a battery pack including the same, and an electric device including the same, which are used to solve the problem that it is difficult to effectively detect the damage of the heating film. The specific technical scheme is as follows:
in a first aspect, the present application provides a heating film comprising: the electric heating element, the detection conductive element and the two layers of membranes; the electric heating element and the detection conductive element are positioned between the two layers of the membrane; the detection conductive element surrounds the electric heating element and is positioned between the electric heating element and the edge of the diaphragm; the strength of the detection conductive element is less than the strength of the electric heating element.
According to the heating film provided by the embodiment of the application, the electric heating element is positioned between the two layers of the membranes, and the heating function can be realized under the condition of connection; the detection conductive element surrounds the electric heating element and is positioned between the electric heating element and the edge of the diaphragm, and because the strength of the detection conductive element is smaller than that of the electric heating element, when the diaphragm and/or the electric heating element are damaged but not completely broken, the detection conductive element is broken first, so that whether the diaphragm and/or the electric heating element are damaged or not can be detected by detecting the on-off state of the detection conductive element. It can be seen that the heating film provided by the embodiment of the application can be effectively detected to be damaged, so that the risk of breakage in the later use process is reduced, and the potential safety hazard is reduced.
In some embodiments of the present application, the sensing conductive element forms a circuitously extending channel; the electrical heating element is integrally arranged within the circuitously extending channel. Therefore, the area where the detection conductive element is arranged can be increased, so that the area range of the area where the electric heating element and/or the diaphragm can be effectively detected is enlarged, and the detection sensitivity is improved.
In some embodiments of the present application, the electrical heating element extends circuitously within the channel. The electric heating element roundly extends in the channel for detecting the roundabout extension formed by the conductive element, the length of the electric heating element is prolonged, the area where the electric heating element is arranged is enlarged, the heating film can uniformly heat the battery, the heating rate can be increased, the battery can be rapidly heated, and the normal charging and discharging level is reached.
In some embodiments of the present application, the sensing conductive element has a width of 0.5 to 1mm, and the electric heating element has a width of 1.5 to 5 mm. The width of the electric heating element is controlled within the above range, so that the heating film can uniformly heat the battery, and the heating rate can be increased; the width of the detecting conductive element is controlled within the above range, and when the electric heating element is broken but not completely broken, the detecting conductive element is broken first.
In some embodiments of the present application, the sensing conductive element is 1-5mm from the electrical heating element and the sensing conductive element is 1-5mm from the edge of the diaphragm. The distance between the detection conductive element and the electric heating element and the distance between the edges of the membrane are set in the ranges, and when the membrane and/or the electric heating element are broken but not completely broken, the detection conductive element is broken firstly.
In some embodiments of the present application, the width spacing between the electrical heating elements is 1-5mm, and the electrical heating elements are 3-6mm from the edge of the film sheet. The width interval between the electric heating elements is set in the range, which is beneficial for the heating film to uniformly heat the battery and can improve the heating rate; the distance between the electric heating element and the edge of the membrane is set within the range, which is beneficial to arranging the detection conductive element between the electric heating element and the edge of the membrane.
In some embodiments of the present application, the sensing conductive element has a thickness of 0.03-0.1mm, and the electric heating element has a thickness of 0.03-0.1 mm. The thickness of the electric heating element is controlled within the above range, so that the heating film can uniformly heat the battery, and the heating rate can be increased; the thickness of the detecting conductive member is controlled within the above range, and when the electric heating element is broken but not completely broken, the detecting conductive member is broken first.
In some embodiments of the present application, the material used for the electrical heating element is selected from at least one of an electrically conductive metal and an electrically conductive alloy; the material adopted by the detection conductive element is at least one selected from conductive metal, conductive alloy and conductive oxide; wherein the conductive metals are each independently selected from at least one of copper, iron, chromium, aluminum, and titanium, the conductive alloys are each independently selected from at least one of nickel-aluminum alloys and copper-tin alloys, and the conductive oxides are selected from zinc oxide; the diaphragm is an insulating diaphragm, and the insulating diaphragm is made of at least one material selected from polyimide, polyethylene terephthalate, polyethylene and polyvinylidene fluoride. The electric heating element is made of the materials, so that the heating effect of the heating film is improved; the detection conductive element is made of the material, when the electric heating element is broken but not completely broken, the detection conductive element is broken firstly, and the occurrence of the breakage condition can be detected through an external circuit. The diaphragm is an insulating diaphragm, so that the electric heating element and the detection conductive element in the two layers of diaphragms can be prevented from being electrically connected with the outside; the insulating membrane is made of the materials, so that the insulating effect is good and the cost is low.
In some embodiments of the present application, the sensing conductive element forms at least one opening for passage of the electrical heating element and connection to an external circuit. The opening is formed by the detection conductive element, so that the electric heating element can pass through the opening, and the on-off condition of the detection conductive element can be detected by connecting the opening with an external circuit, so that whether the detection conductive element is broken or not is judged, and further whether the diaphragm and/or the electric heating element are damaged or not is judged.
In a second aspect, the present application provides a battery module comprising the heating film of the above embodiment for heating the battery. Therefore, whether the diaphragm and/or the electric heating element are damaged or not can be detected by detecting the on-off of the conductive element, so that the potential safety hazard is reduced; when the external environment temperature is lower, the heating film can heat the battery in the battery module so as to ensure that the self temperature of the battery can reach the level of normal charge and discharge.
In a third aspect, the present application provides a battery pack including the battery module in the above embodiment. Therefore, whether the diaphragm and/or the electric heating element are damaged or not can be detected by detecting the on-off of the conductive element, so that the potential safety hazard is reduced; when the temperature of the external environment is lower, the heating film can heat the battery in the battery pack so as to ensure that the temperature of the battery can reach the level of normal charge and discharge.
In a fourth aspect, the present application provides an electric device including at least one of the heating film, the battery module, or the battery pack of the above embodiments. Therefore, whether the diaphragm and/or the electric heating element are damaged or not can be detected by detecting the on-off of the conductive element, so that the potential safety hazard is reduced; when the temperature of the external environment is lower, the heating film can heat the battery in the electric device so as to ensure that the temperature of the battery can reach the level of normal charge and discharge.
Of course, not all advantages described above need to be achieved at the same time in the practice of any one product or method of the present application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a top view of a heater film according to some embodiments of the present application;
FIG. 2 is a schematic diagram of the structure of a diaphragm, an electrical heating element, and a sensing conductive element in a heating film according to some embodiments of the present application;
FIG. 3 is a top view of a heater film according to other embodiments of the present application;
FIG. 4 is a schematic diagram of the configuration of a diaphragm, an electrical heating element, and a sensing conductor in a heater film according to further embodiments of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the description of the embodiments of the present application, the terms "width", "thickness", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present application.
The inventor of the application notices that when the battery system of the new energy automobile meets the external environment temperature, the working efficiency is low, so that the battery needs to be heated by adopting the heating film, and the self temperature of the battery can reach the level of normal charging and discharging. However, when the heating film is damaged by scratches and the like, even if the heating film is damaged, the heating film is not directly broken, but is easily broken in the later use process, so that safety accidents are caused. Therefore, it is required to effectively detect the breakage of the heating film but not the complete breakage thereof, thereby reducing the safety risk during the use thereof.
Based on the above, in order to solve the problem of effectively detecting the damage condition of the heating film, the inventor has conducted intensive research and designed a heating film, wherein an electric heating element is positioned between two layers of diaphragms, and the electric heating element realizes the heating function under the condition of being switched on; the detection conductive element surrounds the electric heating element and is positioned between the electric heating element and the edge of the diaphragm, and because the strength of the detection conductive element is smaller than that of the electric heating element, when the diaphragm and/or the electric heating element are damaged but not completely broken, the detection conductive element is broken first, so that whether the diaphragm and/or the electric heating element are damaged or not can be detected by detecting the on-off state of the detection conductive element.
In a first aspect, as shown in fig. 1 and 2, an embodiment of the present application provides a heating film 10, including: two layers of membranes 1, electric heating elements 2 and detection conductive elements 3; the electric heating element 2 and the detection conductive element 3 are positioned between the two layers of the membrane 1, and the detection conductive element 3 surrounds the electric heating element 2 and is positioned between the electric heating element 2 and the edge of the membrane 1; the strength of the sensing conductor 3 is less than the strength of the electric heating element 2.
The electric heating element 2 in the embodiment of the present application is located between the two layers of membrane 1, and can perform the heating function when it is switched on. Because the strength of the electric heating element 2 is high, when the heating film 10 is damaged by scratches and the like, the electric heating element 2 is often damaged and not directly broken even if damaged, but is easily broken in the later use process, thereby easily causing safety accidents. Since the sensing conductive member 3 surrounds the electric heating element 2 and is located between the electric heating element 2 and the edge of the diaphragm 1, and the strength of the sensing conductive member 3 is smaller than that of the electric heating element 2, the sensing conductive member 3 is broken first when the electric heating element 2 is broken but not completely broken. Therefore, by detecting the on/off state of the detection conductive element 3, it is possible to detect whether the electric heating element 2 is broken or not.
The detection conductive element 3 in the embodiment of the application is located between the two layers of membranes 1, and if one or two layers of membranes 1 are damaged but not completely broken, the detection conductive element 3 is broken first. Therefore, by detecting the on/off of the detection conductive element 3, it is possible to detect whether or not the one or both layers of the diaphragm 1 are broken.
It can be seen that, by adopting the heating film 10 provided by the embodiment of the application, the condition that the diaphragm 1 and/or the electric heating element 2 are damaged can be effectively detected, so that the risk of breakage in the later use process is reduced, and the potential safety hazard is reduced.
In some embodiments of the present application, the sensing conductive element 3 forms a circuitously extending channel; the electric heating element 2 is arranged entirely within the circuitously extending channel. Therefore, the area for detecting the conductive element 3 can be increased, so that the area range for effectively detecting the damage of the electric heating element 2 and/or the diaphragm 1 can be enlarged, and the detection sensitivity can be improved. For example, when the portion of the electric heating element 2 between the two layers of membranes 1 near the center is broken, or the portion of the membrane 1 near the center is broken, the portion of the sensing conductive element 3 between the two layers of membranes 1 near the center is broken before the portion of the sensing conductive element 3 between the two layers of membranes 1 near the edge of the membrane 1, so as to effectively detect the breakage of the electric heating element 2 and/or the membrane 1 in the whole area.
Further, the electric heating element 2 extends circuitously within the channel. The electric heating element 2 is extended in a circuitous way in a channel formed by the detection conductive element 3, the length of the electric heating element 2 is prolonged, and the area where the electric heating element 2 is arranged is enlarged, so that the heating film 10 can uniformly heat the battery, the heating rate can be increased, and the battery can be rapidly heated to reach the level of normal charging and discharging.
In some embodiments of the present application, the width of the sensing conductive element 3 is 0.5-1mm, and the width of the electric heating element 2 is 1.5-5 mm. The width of the electric heating element 2 is controlled within the above range so that the heating film 10 can uniformly heat the battery and the heating rate can be increased; the width of the detecting conductive member 3 is controlled within the above range, and when the electric heating element 2 is broken but not completely broken, the detecting conductive member 3 is broken first.
In some embodiments of the present application, the distance between the sensing conductive element 3 and the electric heating element 2 is 1-5mm, and the distance between the sensing conductive element 3 and the edge of the diaphragm 1 is 1-5 mm. The distance between the detection conductive element 3 and the electric heating element 2 and the distance between the edges of the diaphragm 1 are set within the above ranges, and when the diaphragm 1 and/or the electric heating element 2 are broken but not completely broken, the detection conductive element 3 is broken first.
In some embodiments of the present application, the width spacing between the electrical heating elements 2 is 1-5mm, and the distance between the electrical heating elements 2 and the edge of the film web 1 is 3-6 mm. The width interval between the electric heating elements 2 is set within the above range, which is advantageous in that the heating film 10 can uniformly heat the battery and the heating rate can be increased. The distance of the electric heating element 2 from the edge of the membrane 1 is set in the above range, which is advantageous for arranging the detecting conductive element 3 between the electric heating element 2 and the edge of the membrane 1.
In some embodiments of the present application, the sensing conductive element 3 has a thickness of 0.03-0.1mm, and the electric heating element 2 has a thickness of 0.03-0.1 mm. The thickness of the electric heating element 2 is controlled within the above range, so that the heating film 10 can uniformly heat the battery, and the heating rate can be increased; the thickness of the detecting conductive member 3 is controlled within the above range, and when the electric heating element 2 is broken but not completely broken, the detecting conductive member 3 is broken first. In a preferred embodiment, the thickness of the sensing conductive member 3 is the same as that of the electric heating element 2, so that the resulting heating film 10 is provided, and the outer surface of the heating film 10 is relatively flat.
In some embodiments of the present application, the material used for the electric heating element 2 is selected from at least one of an electrically conductive metal and an electrically conductive alloy; the material adopted by the detection conductive element 3 is at least one selected from conductive metal, conductive alloy and conductive oxide; wherein each conductive metal is independently selected from at least one of copper, iron, chromium, aluminum and titanium, each conductive alloy is independently selected from at least one of nickel-aluminum alloy and copper-tin alloy, and the conductive oxide is selected from zinc oxide. The electric heating element 2 is made of the materials, so that the heating effect of the heating film 10 is improved; the detection conductive element 3 is made of the material, and because the strength of the detection conductive element 3 is smaller than that of the electric heating element 2, when the electric heating element 2 is broken but not completely broken, the detection conductive element 3 is broken first, and the occurrence of the breakage can be detected through an external circuit.
In some embodiments of the present application, the membrane 1 is an insulating membrane, and the material used for the insulating membrane is at least one selected from Polyimide (PI), polyethylene terephthalate (PET), Polyethylene (PE), and polyvinylidene fluoride (PVDF), that is, the material used for the insulating membrane may be any one of the above materials, or a mixture of any two or more of the above materials, or a polymer of any two or more of the above materials. The membrane 1 is an insulating membrane, so that the electric heating element 2 and the detection conductive element 3 in the two layers of membranes 1 can be prevented from being electrically connected with the outside; the insulating membrane is made of the materials, so that the insulating effect is good and the cost is low.
In some embodiments of the present application, the sensing conductive element 3 forms at least one opening for the passage of the electrical heating element 2 and the connection to an external electrical circuit. The detection conductive element 3 forms an opening, so that the electric heating element 2 can pass through the opening, and the on-off condition of the detection conductive element 3 can be detected by connecting the detection conductive element 3 with an external circuit, so that whether the detection conductive element 3 breaks or not is judged, and further whether the diaphragm 1 and/or the electric heating element 2 is damaged or not is judged.
The external detection circuit for detecting the on-off of the conductive element 3 is not limited, and the purpose of the external detection circuit can be achieved, for example, a multimeter can be used for detection manually, and an integrated circuit can also be used for automatic detection.
In order to achieve the heating function of the electric heating element 2, an interface is included in the electric heating element 2, to which an external circuit can be connected.
The present application is not particularly limited as far as the thickness of the membrane sheet 1 can be achieved.
The present application is not particularly limited as to the size or dimension of the heating film 10 as long as the object of the present application can be achieved.
In order to achieve adhesion of the membrane 1 to the electric heating element 2 and the sensing conductor 3, the membrane 1 may be provided with a backing adhesive, such as a double-sided adhesive backing adhesive.
The present application is not particularly limited as to the specific layout of the electric heating element 2 and the detecting conductive member 3 as long as the object of the present application can be achieved. For example, the electrical heating element 2 may have a serpentine course, which may be S-shaped, M-shaped or in another curved form; the meandering course of the detection conductor 3 may be rectangular, but may also be S-shaped or in another curved form.
Fig. 1 and 2 show one type of heating film 10 as claimed in the present application, in which an electric heating element 2 and a detecting conductive element 3 are located between two layers of membrane sheet 1; the detection conductive element 3 surrounds the electric heating element 2 and is located between the electric heating element 2 and the edge of the membrane 3; the detection conductive element 3 forms two openings through which the power heating element 2 passes and is connected with an external circuit; the detection conductive element 3 forms a roundabout extending channel, the roundabout extending direction is S-shaped, specifically, the S-shaped channel comprises a plurality of linear sub-channels, each sub-channel extends along a first direction, and the plurality of linear sub-channels are sequentially connected end to form the S-shaped channel; the electric heating element 2 is arranged in a channel in which the detection conductive element 3 forms a circuitous extension, and the electric heating element 2 is circuitous extending in the channel, and the electric heating element 2 comprises a plurality of sections, each section is correspondingly arranged in one sub-channel, and each section comprises a plurality of S-shaped sub-sections arranged along the first direction.
Fig. 3 and 4 show another heating film 10 as claimed in the present application, in which the electric heating element 2 and the detecting conductive element 3 are located between two layers of membrane sheets 1; the detection conductive element 3 surrounds the electric heating element 2 and is located between the electric heating element 2 and the edge of the membrane 3; the detection conductive element 3 forms two openings through which the power heating element 2 passes and is connected with an external circuit; the detection conductive element 3 forms a roundabout extending channel, the roundabout extending direction is S-shaped, specifically, the S-shaped channel comprises a plurality of linear sub-channels, each sub-channel extends along a first direction, and the plurality of linear sub-channels are sequentially connected end to form the S-shaped channel; the electric heating element 2 is arranged in a channel in which the detection conductive element 3 forms a circuitous extension, and the electric heating element 2 is circuitous extending in the channel, and the electric heating element 2 comprises a plurality of sections, each section is correspondingly arranged in one sub-channel, and each section comprises a plurality of S-shaped sub-sections arranged along a second direction, wherein the second direction is perpendicular to the first direction.
In a second aspect, the present embodiments provide a battery module including the heating film 10 according to the first aspect of the present disclosure. The battery module according to the present application may be provided with a heating film 10 on the outer side of at least one surface thereof for heating the battery module. Therefore, when the external environment temperature is low, the heating film 10 can heat the battery in the battery module, so as to ensure that the temperature of the battery can reach the normal charge and discharge level; when the diaphragm 1 and/or the electric heating element 2 are damaged but not completely broken, the detection conductive element 3 is broken first, so that whether the diaphragm 1 and/or the electric heating element 2 are damaged or not is detected by detecting the on-off of the detection conductive element 3, and the potential safety hazard is reduced. The present application is not particularly limited as long as the object of the present application can be achieved.
In a third aspect, an embodiment of the present application provides a battery pack including the battery module described in the second aspect of the present application. Therefore, when the external environment temperature is low, the heating film 10 can heat the battery in the battery pack so as to ensure that the temperature of the battery can reach the normal charge and discharge level; when the diaphragm 1 and/or the electric heating element 2 are/is damaged but not completely broken, the detection conductive element 3 is firstly broken, so that whether the diaphragm 1 and/or the electric heating element 2 are/is damaged or not is detected by detecting the on-off of the detection conductive element 3, and the potential safety hazard is reduced. The present application is not particularly limited as long as the object of the present application can be achieved.
In a fourth aspect, an embodiment of the present application provides an electric device, which includes at least one of the heating film 10 according to the first aspect of the present application, the battery module according to the second aspect of the present application, or the battery pack according to the third aspect of the present application. Therefore, when the external environment temperature is low, the heating film 10 can heat the battery to ensure that the temperature of the battery can reach the normal charge and discharge level; when the diaphragm 1 and/or the electric heating element 2 are damaged but not completely broken, the detection conductive element 3 is broken first, so that whether the diaphragm 1 and/or the electric heating element 2 are damaged or not is detected by detecting the on-off of the detection conductive element 3, and the potential safety hazard is reduced.
The present application is not particularly limited as long as the object of the present application can be achieved. The powered device may be, but is not limited to, a cell phone, tablet, laptop, electronic toy, electric tool, battery car, electric car, ship, spacecraft, and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only for the preferred embodiment of the present application and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application are included in the protection scope of the present application.
Claims (12)
1. A heating film, comprising: the electric heating element, the detection conductive element and the two layers of membranes;
the electric heating element and the detection conductive element are positioned between the two layers of the membrane; the detection conductive element surrounds the electric heating element and is positioned between the electric heating element and the edge of the diaphragm; the strength of the detection conductive element is less than the strength of the electric heating element.
2. A heating film according to claim 1, wherein the detection conductive member forms a meander-extending channel; the electrical heating element is integrally arranged within the circuitously extending channel.
3. A heating film as claimed in claim 2, wherein the electric heating element extends circuitously within the channel.
4. A heating film according to any one of claims 1 to 3, wherein the width of the detection conductive element is 0.5-1mm, and the width of the electric heating element is 1.5-5 mm.
5. A heating film according to any of claims 1 to 3, wherein the distance of the sensing conductor from the electrical heating element is 1-5mm and the distance of the sensing conductor from the edge of the film sheet is 1-5 mm.
6. A heating film as claimed in any one of claims 1 to 3, wherein the width spacing between the sensing conductive elements is 1-5mm and the distance of the electrical heating element from the edge of the film sheet is 3-6 mm.
7. A heating film according to any one of claims 1 to 3, wherein the thickness of the detecting conductive member is 0.03-0.1mm, and the thickness of the electric heating member is 0.03-0.1 mm.
8. A heating film as claimed in any one of claims 1 to 3, wherein the material used for the electric heating element is selected from electrically conductive metals or alloys; the material adopted by the detection conductive element is selected from conductive metal, conductive alloy or conductive oxide; wherein the conductive metals are each independently selected from copper, iron, chromium, aluminum or titanium, the conductive alloys are each independently selected from nickel-aluminum alloys or copper-tin alloys, and the conductive oxides are selected from zinc oxide;
the diaphragm is an insulating diaphragm, and the insulating diaphragm is made of materials selected from polyimide, polyethylene terephthalate, polyethylene or polyvinylidene fluoride.
9. A heating film according to any one of claims 1 to 3, wherein the detecting conductive member forms at least one opening for passing the electric heating element therethrough and connecting with an external circuit.
10. A battery module characterized by comprising the heating film according to any one of claims 1 to 9.
11. A battery pack comprising the battery module according to claim 10.
12. An electric device comprising at least one selected from the heating film according to any one of claims 1 to 9, the battery module according to claim 10, or the battery pack according to claim 11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122758262.2U CN216488266U (en) | 2021-11-11 | 2021-11-11 | Heating film, battery module comprising same, battery pack and electric device |
| PCT/CN2022/130724 WO2023083196A1 (en) | 2021-11-11 | 2022-11-08 | Heating film, battery module comprising heating film, battery pack and electrical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122758262.2U CN216488266U (en) | 2021-11-11 | 2021-11-11 | Heating film, battery module comprising same, battery pack and electric device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216488266U true CN216488266U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122758262.2U Active CN216488266U (en) | 2021-11-11 | 2021-11-11 | Heating film, battery module comprising same, battery pack and electric device |
Country Status (2)
| Country | Link |
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| CN (1) | CN216488266U (en) |
| WO (1) | WO2023083196A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023083196A1 (en) * | 2021-11-11 | 2023-05-19 | 宁德时代新能源科技股份有限公司 | Heating film, battery module comprising heating film, battery pack and electrical device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1898504A (en) * | 2003-12-23 | 2007-01-17 | Bsh博施及西门子家用器具有限公司 | Thick-film fluid heater and continuous heating device |
| CN106028482B (en) * | 2016-07-04 | 2023-07-14 | 广东新宝电器股份有限公司 | Multiple protection quartz capsule heating device |
| CN206379445U (en) * | 2017-01-18 | 2017-08-04 | 华霆（合肥）动力技术有限公司 | Heating film group and power-supply device |
| CN206907894U (en) * | 2017-05-26 | 2018-01-19 | 北京新能源汽车股份有限公司 | Battery modules and electric automobile |
| CN109991489A (en) * | 2017-12-30 | 2019-07-09 | 深圳市泰瑞达科技有限公司 | A kind of the safety detection circuit and its system of heating coating component |
| CN211212628U (en) * | 2019-09-25 | 2020-08-11 | 李高升 | Heating circuit of glass electric kettle and glass electric kettle |
| CN216488266U (en) * | 2021-11-11 | 2022-05-10 | 宁德时代新能源科技股份有限公司 | Heating film, battery module comprising same, battery pack and electric device |
-
2021
- 2021-11-11 CN CN202122758262.2U patent/CN216488266U/en active Active
-
2022
- 2022-11-08 WO PCT/CN2022/130724 patent/WO2023083196A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023083196A1 (en) * | 2021-11-11 | 2023-05-19 | 宁德时代新能源科技股份有限公司 | Heating film, battery module comprising heating film, battery pack and electrical device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023083196A1 (en) | 2023-05-19 |
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