WO2024036771A1 - 加热装置、电池以及用电装置 - Google Patents

加热装置、电池以及用电装置 Download PDF

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Publication number
WO2024036771A1
WO2024036771A1 PCT/CN2022/130483 CN2022130483W WO2024036771A1 WO 2024036771 A1 WO2024036771 A1 WO 2024036771A1 CN 2022130483 W CN2022130483 W CN 2022130483W WO 2024036771 A1 WO2024036771 A1 WO 2024036771A1
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WO
WIPO (PCT)
Prior art keywords
heating
heating device
adapter
battery
length direction
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Application number
PCT/CN2022/130483
Other languages
English (en)
French (fr)
Inventor
陈仁煜
Original Assignee
江苏时代新能源科技有限公司
宁德时代新能源科技股份有限公司
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Application filed by 江苏时代新能源科技有限公司, 宁德时代新能源科技股份有限公司 filed Critical 江苏时代新能源科技有限公司
Publication of WO2024036771A1 publication Critical patent/WO2024036771A1/zh

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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
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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

Definitions

  • the present application relates to the field of batteries, and in particular to a heating device, a battery and an electrical device.
  • Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection.
  • battery technology is an important factor related to their development.
  • a heating device is usually provided inside to heat the battery cells to ensure the battery's working requirements in low-temperature environments.
  • the existing heating device structure has flaws. When the battery cells expand due to heat, they are unable to accommodate the thickness changes caused by the expansion of the battery cells, and are prone to wrinkles and dry burning, affecting the overall safety performance of the battery.
  • this application provides a heating device, a battery and an electrical device.
  • the heating device can not only ensure the heating requirements of the battery cells, but also be compatible with the thickness changes caused by the expansion of the battery cells, and avoid wrinkles and dry burning phenomena. occurs to ensure the safety performance of the battery.
  • the application provides a heating device, including: a heating piece used to heat a battery cell, the heating piece being stretchable in its own length direction; and an adapter component used to connect the heating piece to the battery cell.
  • the adapter component includes more than two adapter bodies distributed along the length direction; wherein, the heating device can switch from the initial state to the stretched state; in the initial state, along the length direction, the length dimension of the heating piece is the first dimension, Two adjacent adapters are connected; in the stretched state, along the length direction, the heating sheet is stretched and elongated from the first dimension to the second dimension, and at least two adjacent adapters are disconnected from each other,
  • the second dimension is the vertical distance between the two end surfaces of the heating sheet along the length direction in the stretched state.
  • the heating device provided in the embodiment of the present application includes a heating piece and an adapter component.
  • the heating piece can be connected to the battery cell through the adapter component, and the heating piece is used to heat the battery cell to ensure that the battery cell can be heated at a predetermined temperature.
  • Work Since the heating sheet can be stretched in its own length direction, and the adapter component includes more than two adapter bodies distributed along the length direction, and the heating device can switch from the initial state to the stretched state, when the battery cell expands , the heating device can be switched from the initial state to the stretched state, the heating piece is extended from the first size to the second size, and at least two adjacent adapters are disconnected from each other, and can be compatible with the thickness caused by the expansion of the battery cells. Due to the elongation of the heating plate and the disconnection setting of the adapter, the heating plate can be prevented from wrinkles and can always be connected to the corresponding battery cell to avoid dry burning and ensure the safety performance of the battery.
  • the heating sheet includes two or more heating units and a connector.
  • the two or more heating units are distributed along the length direction.
  • the connector is used to connect two adjacent heating units.
  • the connector is stretchable along the length direction.
  • Each heating unit is connected to an adapter.
  • the heating device provided by the embodiment of the present application, through the above settings, when the battery cell expands and the thickness increases, at least two adapter bodies are disconnected and the position in the length direction changes with the expansion of the battery cell. Since each heating unit is connected to an adapter body, the corresponding heating unit can move with the adapter body, and the connector body can be stretched along the length direction. When the heating unit moves with the adapter body, the connector body can be elongated. , which can ensure compatibility with changes in thickness and size of battery cells when they expand, avoid dry burning caused by wrinkles in the heating device, and improve the safety performance of the battery.
  • the connector extends along a curved trajectory.
  • the heating device provided in the embodiment of the present application allows the connector to store a certain redundant length by extending the connector along a curved track along the length direction.
  • the connector When the battery cell expands and the thickness increases, the connector extending along the curved track will The connector will be stretched to accommodate changes in thickness and size of the battery cells.
  • the connector extends along a fold line trajectory.
  • the heating device provided in the embodiments of the present application can also allow the connector to store a certain redundant length by extending the connector along the folded track along the length direction.
  • the connector can be extended along the folded track. The extended connector will be stretched to accommodate changes in thickness and size of the battery cells.
  • the heating unit is in the form of a polygonal block structure.
  • the heating device provided in the embodiment of the present application facilitates molding by making the heating unit have a polygonal block structure and can ensure the connection requirements with the adapter components. At the same time, it can increase the heating area of the battery cells and ensure the heating effect.
  • the heating sheet further includes an input terminal and an output terminal, located in the two outermost heating units along the length direction, where one heating unit is connected to the input terminal and the other heating unit is connected to the output terminal.
  • the heating device provided in the embodiment of the present application can facilitate the connection between the heating plate and the external structure by arranging input terminals and output terminals to obtain energy and convert it into thermal energy for transmission in each heating unit to meet the heating requirements of the battery cells.
  • the heating unit, the connector, the input terminal and the output terminal are an integrated structure.
  • the heating device provided by the embodiment of the present application has an integrated structure of the heating unit, the connector, the input terminal and the output terminal, which can not only ensure the connection strength between the heating unit, the connector, the input terminal and the output terminal, but also facilitate heating. Forming of slices.
  • the heating device further includes a thermal conductive layer connected to the heating sheet, and the thermal conductive layer is used to transfer heat from the heating sheet to the battery cells.
  • the heating device provided in the embodiment of the present application can use the thermal conductive layer to quickly and evenly conduct heat from the heating plate to the battery cells by providing a thermal conductive layer, thereby ensuring the heating requirements for the battery cells.
  • the thermally conductive layer is an elastomer and is used to contact the battery cells.
  • the heating device used in the embodiment of the present application uses elastomer as the thermal conductive layer and is used to contact the battery cells, so that when the battery cells expand and deform, the thermal conductive layer can adapt to the deformation of the battery cells and always remain in contact with the battery cells. body contact to ensure the heat transfer effect and reduce the probability of dry burning of the heating device.
  • the thermal conductive layer is in the form of an elastic pad, which can also avoid rigid contact between the heating device and the battery cells, and reduce damage to the battery cells during vibration during battery transportation and other processes.
  • the adapter component has a limiting groove, and the shape of the heating piece matches the shape of the limiting groove and snaps into the limiting groove.
  • the limiting groove is used to limit the relative position of the heating piece and the adapter component. .
  • the heating device provided by the embodiment of the present application can use the limiting groove to realize the connection between the adapter component and the heating plate by providing a limiting groove on the adapter component.
  • the limiting groove can be used to control the heating plate when it is installed to Positioning and limiting when transferring components to ensure installation requirements.
  • the limiting groove has a bottom wall that abuts the heating sheet, and the adapter component also has an escape hole, and the escape hole is provided through the bottom wall along the thickness direction of the heating sheet.
  • the heating device provided in the embodiment of the present application can facilitate the heating plate to contact the battery cells directly or indirectly through the thermal conductive layer by setting the avoidance hole, ensuring the heat transfer requirements and satisfying the heating of the battery cells.
  • the heating plate is adhesively connected to the adapter component.
  • the heating plate and the adapter component are connected by adhesive connection, which can not only ensure the connection strength between the heating plate and the adapter component, but also eliminate the need to provide connection holes on the surface of the heating plate. and other structures to ensure the heating performance of the heating plate and facilitate the construction when the two are connected.
  • the limiting groove has a bottom wall that abuts the heating plate
  • the adapter component also has a glue-containing groove.
  • the glue-containing groove is formed by a recess in the bottom wall in a direction away from the heating plate, and an adhesive groove is provided in the glue-containing groove. Glue, the glue is used to connect the heating plate and the adapter component.
  • the heating device provided in the embodiment of the present application can provide a glue-coating area and space by arranging a glue-containing groove on the bottom wall of the limiting groove, which is conducive to fixing the heating piece in the limiting groove of the adapter component through glue, ensuring that The heating element will not move during the transfer and assembly process, which will affect the thermal conductivity and lead to uneven heating or dry burning.
  • the number of glue-containing grooves is more than two, and the two or more glue-containing grooves are spaced apart from each other.
  • the heating device by setting the number of glue-containing grooves to more than two, adhesive glue can be provided in each glue-containing groove, and a multi-point connection method can be used to improve the connection between the heating plate and the transfer The bonding area between components ensures the strength of the connection between them.
  • a connecting portion is provided between two adjacent adapter bodies along the length direction; in the initial state, two adjacent adapter bodies are connected through the connecting portion; in the tensile state, the connecting portion breaks to Disconnect two adjacent adapters from each other.
  • the heating device provided by the embodiment of the present application provides a connecting part between two adjacent adapter bodies, so that in the initial state, the two adjacent adapter bodies can be connected as a whole through the connecting part, which can ensure that the adapter
  • the integrity of the components facilitates the matching and installation between the adapter components, the heating plate and the battery cells.
  • the connection part can break before the adapter body, so that the two adjacent adapter bodies are disconnected from each other and can move with the expansion of the battery cell to be compatible with the thickness of the battery cell.
  • the change in size prevents dry burning and ensures the safety performance of the battery.
  • the thickness of the connecting portion is smaller than the thickness of the adapter body.
  • the heating device provided by the embodiment of the present application can ensure that the strength of the connection part is smaller than the strength of the adapter body by making the thickness of the connection part smaller than the thickness of the adapter body.
  • the heating device switches from the initial state to the stretched state, it is beneficial to The connection part is broken to accommodate changes in the thickness and size of the battery cells.
  • the width of the connecting portion is smaller than the width of the adapter body.
  • the heating device provided in the embodiment of the present application can also ensure that the strength of the connecting part is smaller than the strength of the adapter body by making the width of the connection part smaller than the width of the adapter body.
  • the heating device switches from the initial state to the stretched state, It is conducive to the breakage of the connection part to be compatible with changes in the thickness and size of the battery cells.
  • the present application provides a battery, including: a plurality of battery cells; the above-mentioned heating device, the heating piece is connected to the plurality of battery cells through an adapter component to heat the plurality of battery cells.
  • the present application provides an electrical device, including the above-mentioned battery, and the battery is used to provide electrical energy.
  • Figure 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application.
  • Figure 2 is a schematic structural diagram of a battery provided by an embodiment of the present application.
  • Figure 3 is a schematic structural diagram of a battery module from one perspective according to an embodiment of the application.
  • Figure 4 is a schematic structural diagram from another perspective of a battery module provided by an embodiment of the present application.
  • Figure 5 is a schematic structural diagram of a heating device provided by an embodiment of the present application.
  • Figure 6 is a schematic structural diagram of a heating plate provided by an embodiment of the present application.
  • Figure 7 is a schematic structural diagram of a heating device provided by another embodiment of the present application.
  • Figure 8 is a schematic structural diagram of an adapter component provided by an embodiment of the present application from one perspective;
  • Figure 9 is a schematic structural diagram of the adapter component provided by an embodiment of the present application from another perspective.
  • Figure 10 is a partial enlarged view of position A in Figure 9;
  • Figure 11 is a side view of an adapter component provided by an embodiment of the present application.
  • Figure 12 is a partial enlarged view of B in Figure 11;
  • Figure 13 is a top view of an adapter component provided by an embodiment of the present application.
  • FIG. 14 is a partial enlarged view of position C in FIG. 13 .
  • a first feature “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in direct contact. Indirect contact through intermediaries.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • "Below”, “below” and “beneath” the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. . As the application fields of power batteries continue to expand, their market demand is also constantly expanding.
  • the battery mentioned in the embodiments of this application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack.
  • Batteries generally include a box for packaging one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
  • the battery structure is usually equipped with a heating device inside to heat the battery cells to ensure the battery's working requirements in low-temperature environments.
  • the existing heating device structure has defects and is prone to wrinkles and dry burning, affecting the overall safety performance of the battery.
  • existing heating devices usually adopt the form of heating films prepared by printing processes, etc., which cannot be extended in the length direction.
  • the thickness of the battery cells changes due to expansion, the existing heating devices are not compatible with the battery cells. The thickness change caused by expansion makes the heating device itself prone to wrinkles and even dry burning, which affects the safety performance of the battery.
  • the structure of the heating device can be changed so that its shape can change with the thickness of the battery cell to be compatible with the thickness change caused by the expansion of the battery cell. .
  • the heating device includes a heating plate and an adapter component.
  • the heating plate is used to heat the battery cells.
  • the heating piece can be stretched in its own length direction.
  • the adapter component is used to connect the heating plate to the battery cell, and the adapter component includes two or more adapter bodies distributed along the length direction.
  • the heating device can be switched from an initial state to a stretched state; in the initial state, along the length direction, the length dimension of the heating sheet is the first dimension, and two adjacent adapters are connected; in the stretched state, along the length direction, , the heating sheet is stretched and elongated from the first dimension to the second dimension, and at least two adjacent adapter bodies are disconnected from each other.
  • the heating piece can be connected to the battery cell through the adapter component, and the heating piece is used to heat the battery cell to ensure that the battery cell can operate at a predetermined temperature.
  • the heating sheet can be stretched in its own length direction, and the adapter component includes more than two adapter bodies distributed along the length direction, and the heating device can switch from the initial state to the stretched state, when the battery cell expands , the heating device can be switched from the initial state to the stretched state, the heating piece is extended from the first size to the second size, and at least two adjacent adapters are disconnected from each other, and can be compatible with the thickness caused by the expansion of the battery cells. Due to the elongation of the heating plate and the disconnection setting of the adapter, the heating plate can be prevented from wrinkles and can always be connected to the corresponding battery cell to avoid dry burning and ensure the safety performance of the battery.
  • Electrical devices can be vehicles, cell phones, portable devices, laptops, ships, spacecraft, electric toys and power tools, etc.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.
  • spacecraft include aircraft, rockets, space shuttles, spaceships, etc.
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.
  • electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • Electric drills Electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, planers and more.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • the battery 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 .
  • the battery 100 may be used to power the vehicle 1000 , for example, the battery 100 may serve as an operating power source for the vehicle 1000 .
  • the vehicle 1000 may also include a controller 200 and a motor 300 .
  • the controller 200 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating and driving the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but also can be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
  • the battery 100 includes a case 10 , a battery cell 20 and a heating device 40 .
  • the battery cell 20 and the heating device 40 are accommodated in the case 10 .
  • the box 10 is used to provide accommodating space for the battery cells 20 and the heating device 40, and the box 10 can adopt a variety of structures.
  • the box 10 may include a first part 11 and a second part 12 , the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a space for accommodating the battery cells 20 accommodation space 13.
  • the second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure.
  • the first part 11 covers the open side of the second part 12 so that the first part 11 and the second part 12 jointly define a receiving space.
  • the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12 .
  • the box 10 formed by the first part 11 and the second part 12 can be in various shapes, such as cylinder, rectangular parallelepiped, etc.
  • the battery 100 there may be a plurality of battery cells 20, and the plurality of battery cells 20 may be connected in series, in parallel, or in mixed connection.
  • Mixed connection means that the plurality of battery cells 20 are connected in series and in parallel.
  • the plurality of battery cells 20 can be directly connected in series or in parallel or mixed together, and then the whole composed of the plurality of battery cells 20 is accommodated in the box 10 .
  • the battery 100 can also be in the form of a plurality of battery cells 20 connected in series, parallel or mixed to form a battery module 30, and then the plurality of battery modules 30 are connected in series, parallel or mixed to form a whole and accommodated in the box 10.
  • the battery 100 may also include other structures.
  • the battery 100 may further include a bus component for realizing electrical connections between multiple battery cells.
  • Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.
  • the battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes.
  • the battery cell 20 refers to the smallest unit that constitutes the battery.
  • the battery cell 20 includes a case 21, an electrode assembly and an end cap assembly 22.
  • the casing has an opening, the electrode assembly is disposed in the casing 21 , the electrode assembly includes tabs, and the end cap assembly 22 is disposed to close the opening.
  • the heating device 40 provided by the embodiment of the present application includes a heating piece 41 and an adapter component 42.
  • the heating piece 41 is used to heat the battery cell 20.
  • the heating piece 41 can be stretched in the length direction X of itself.
  • the adapter component 42 is used to connect the heating sheet 41 to the battery cell 20 .
  • the adapter component 42 includes more than two adapter bodies 421 distributed along the length direction X. Among them, the heating device 40 can switch from the initial state to the stretched state. In the initial state, along the length direction One dimension is extended to the second dimension, and at least two adjacent adapter bodies 421 are disconnected from each other.
  • the number of adapter bodies 421 included in the adapter component 42 may be two, three or even more, and two adjacent adapter bodies 421 are connected.
  • connection strength between two adjacent adapter bodies 421 is smaller than the strength of the adapter body 421 itself. That is to say, the force used to separate two adjacent adapter bodies 421 is less than the force used to break the adapter body 421 into two parts.
  • the heating sheet 41 may be at least partially connected to the adapter component 42 , and the heating sheet 41 is connected to the battery cell 20 through the adapter component 42 .
  • the heating sheet 41 can directly contact the battery cell 20 and heat the battery cell 20.
  • other heat conductive parts can be provided between the heating sheet 41 and the battery cell 20 to transfer heat to the battery cell 20.
  • the battery cells 20 are heated.
  • the heating sheet 41 can be electrically heated, and can generate heat when energized.
  • the heating device 40 may be switched from the initial state to the stretched state.
  • the heating sheet 41 as a whole can be made of a material that can be stretched and deformed, and can be stretched and elongated when it bears a tensile force exceeding a predetermined range in the length direction X.
  • the heating sheet 41 can also adopt a partially stretchable form.
  • the heating sheet 41 can be partially arranged in the form of a curve or a polyline along the length direction X. When the heating sheet 41 is subjected to a tensile force exceeding a predetermined range in the length direction The heating sheet 41 is partially stretched.
  • the first dimension can be understood as the vertical distance between two end surfaces of the heating sheet 41 along the length direction X in the initial state.
  • the second dimension can be understood as the vertical distance between the two end surfaces of the heating sheet 41 along the length direction X in the stretched state.
  • the initial state may include when the heating device 40 is used in the battery and the battery cells 20 do not expand or expand such that the thickness of the battery cells 20 is still within a preset threshold range.
  • the tensile state may include when the battery cell 20 expands and the expansion causes the thickness of the battery cell 20 to exceed a preset threshold range.
  • At least two adjacent adapter bodies 421 are separated from each other. It can be understood that in the stretched state, at least two adjacent adapter bodies 421 are separated from each other. There may be a gap between them in the length direction X.
  • the heating device 40 provided in the embodiment of the present application can connect the heating sheet 41 to the battery cell 20 through the adapter component 42, and use the heating sheet 41 to heat the battery cell 20 to ensure that the battery cell 20 can operate at a predetermined temperature. . Since the heating sheet 41 can be stretched in the length direction X of itself, and the adapter member 42 includes more than two adapter bodies 421 distributed along the length direction When the battery cell 20 expands, the heating device 40 can be switched from the initial state to the stretched state, the heating piece 41 is extended from the first size to the second size, and at least two adjacent adapters 421 are disconnected from each other. , can be compatible with the thickness change caused by the expansion of the battery cell 20.
  • the occurrence of wrinkles in the heating piece 41 can be avoided, and it can always be connected to the corresponding battery cell 20. , to avoid the occurrence of dry burning and ensure the safety performance of the battery.
  • the heating sheet 41 includes two or more heating units 411 and a connector 412.
  • the two or more heating units 411 are distributed along the length direction X, and the connector 412 is used to connect two adjacent ones.
  • the heating unit 411 and the connecting body 412 are stretchable along the length direction X, and each heating unit 411 is connected to an adapter body 421.
  • the number of heating units 411 included in the heating sheet 41 may be two, three or even more.
  • the number of heating units 411 may be the same as the number of adapter bodies 421 and arranged in one-to-one correspondence.
  • each heating unit 411 and the adapter body 421 can be connected to each other by snapping, bonding, or other methods.
  • each heating unit 411 is connected to an adapter 421, the corresponding heating unit 411 can move with the adapter 421, and the connector 412 can be stretched along the length direction X.
  • the connecting body 412 can be extended to ensure compatibility with changes in thickness and size of the battery cell 20 when it expands, avoid dry burning caused by wrinkles in the heating device 40, and improve the safety performance of the battery.
  • the connector 412 extends along a curved trajectory.
  • the curved track may include arc segments along the length direction X, and two adjacent arc segments may be directly connected and have opposite protruding directions.
  • two adjacent arc-shaped sections can also be connected through a transition section.
  • the protruding directions of the two related arc-shaped sections can also be the same.
  • the protruding direction of the arc segment intersects with the length direction X, and optionally is perpendicular to each other.
  • the heating device 40 provided in the embodiment of the present application extends the connector 412 along a curved track along the length direction
  • the connector 412 extending along the curved track will be stretched and elongated to accommodate changes in the thickness and size of the battery cell 20 .
  • the connecting body 412 extends along a polyline track.
  • these trajectories may include multiple polyline segments along the length direction X, and the bending directions of the multiple polyline segments may be the same, or of course may be opposite.
  • the shape of the polyline segment may be a sharp angle, for example, it may be a triangle shape, or of course, it may also be a trapezoid shape.
  • the heating device 40 provided in the embodiment of the present application can also enable the connector 412 to store a certain redundant length by extending the connector 412 along the folded track along the length direction , the connector 412 extending along the fold line track will be stretched and elongated to accommodate changes in the thickness and size of the battery cell 20 .
  • the heating unit 411 is in the form of a polygonal block structure.
  • the heating unit 411 may be in the form of a rectangular block, a pentagonal block, a hexagonal block, etc., as long as the heating area of the battery cell 20 can be guaranteed.
  • the heating device 40 provided in the embodiment of the present application makes the heating unit 411 in the form of a polygonal block structure, which is convenient for molding, can ensure the connection requirements with the adapter component 42, and at the same time can increase the heating area of the battery cell 20. Guaranteed heating effect.
  • the heating sheet 41 also includes an input terminal 413 and an output terminal 414.
  • one heating unit 411 is connected to the input terminal 413 and the other The heating unit 411 is connected to an output terminal 414 .
  • the input terminal 413 and the output terminal 414 can be connected to the corresponding heating unit 411 in a fixed connection manner.
  • they can also be connected to each other in a pluggable and detachable manner.
  • the input terminal 413 may be connected to one end of one of the two outermost heating units 411 in the length direction X, or of course, may be connected to one end of the heating unit 411 in the direction intersecting the length direction X.
  • the output terminal 414 may be connected to one end of the other of the two outermost heating units 411 in the length direction X, or of course, may be connected to one end of the heating unit 411 in the direction intersecting the length direction X.
  • the heating device 40 provided in the embodiment of the present application can facilitate the connection between the heating plate 41 and the external structure by setting the input terminal 413 and the output terminal 414 to obtain energy and convert it into heat energy for transmission in each heating unit 411 to meet the requirements for battery cells. heating requirements of body 20.
  • the heating device 40, the heating unit 411, the connector 412, the input terminal 413 and the output terminal 414 provided by the embodiment of the present application are of an integrated structure.
  • the material of the heating plate 41 may include iron-chromium-aluminum electric heating alloy, etc., which has strong oxidation resistance, is light in weight, and is cheap in cost.
  • the heating unit 411, the connecting body 412, the input terminal 413 and the output terminal 414 may be integrally cast or machined.
  • the heating device 40 provided in the embodiment of the present application can ensure that the heating unit 411 , the connector 412 , the input terminal 413 and the output terminal 414 have an integrated structure by making the heating unit 411 , the connector 412 , the input terminal 413 and the output terminal 414 The connection strength between them is also beneficial to the molding of the heating plate 41 .
  • the heating device 40 further includes a thermal conductive layer 43 connected to the heating sheet 41 , and the thermal conductive layer 43 is used to transfer heat from the heating sheet 41 to the battery cell 20 .
  • the thermal conductive layer 43 can use a thermally conductive silicone pad, a one-component adhesive film with thermal conductive properties, etc. to enhance compatibility and reduce the occurrence of dry burning caused by insufficient pasting.
  • thermal conductive layer 43 and the heating sheet 41 may be connected to each other by bonding or other methods.
  • the thermal conductive layer 43 may be made of insulating material to insulate the heating device 40 from the battery cells 20 .
  • a thermal conductive layer 43 may be provided on each heating unit 411.
  • the heating device 40 provided in the embodiment of the present application can use the thermal conductive layer 43 to quickly and evenly conduct the heat of the heating sheet 41 to the battery cells 20 by providing the thermal conductive layer 43 to ensure the heating requirements for the battery cells 20 .
  • the thermal conductive layer 43 is an elastomer and is used to contact the battery cell 20 .
  • the thermally conductive layer 43 may be in the form of an elastic pad.
  • the thermal conductive layer 43 is in contact with the battery cell 20.
  • the heating device 40 used in the embodiment of the present application uses elastomer for the thermal conductive layer 43 and is used to contact the battery cell 20, so that when the battery cell 20 expands and deforms, the thermal conductive layer 43 can adapt to the deformation of the battery cell 20. , always maintain contact with the battery cell 20 to ensure the heat transfer effect and reduce the probability of dry burning of the heating device 40 .
  • the thermal conductive layer 43 is in the form of an elastic pad, which can also prevent the heating device 40 from being in rigid contact with the battery cells 20 and reduce damage to the battery cells 20 during vibration during battery transportation.
  • the adapter component 42 has a limiting groove 423.
  • the shape of the heating piece 41 matches the shape of the limiting groove 423 and is locked in the limiting groove 423.
  • the groove 423 is used to limit the relative position of the heating plate 41 and the adapter component 42 .
  • the shape of the limiting groove 423 matches the outline of the heating plate 41 .
  • the limiting groove 423 may be a rectangular groove or other polygonal groove.
  • the heating piece 41 may be partially or entirely located in the limiting groove 423 .
  • the limiting groove 423 is used to limit the relative position of the heating piece 41 and the adapter member 42. It can be understood that the limiting groove 423 limits the heating piece 41 to a predetermined position of the adapter member 42, and can limit the relative rotation of the heating piece 41.
  • the connecting part 42 moves.
  • the limiting groove 423 can be used to realize the connection between the adapter component 42 and the heating plate 41.
  • the limiting groove can be used to 423 positions and limits the heating plate 41 when it is installed on the adapter component 42 to ensure the installation requirements.
  • the limiting groove 423 has a bottom wall 4231 that abuts the heating sheet 41, and the adapter component 42 also has an escape hole 4232.
  • the escape hole 4232 is along the heating surface.
  • the thickness direction Y of the sheet 41 is disposed through the bottom wall 4231 .
  • the orthogonal projected area of the escape hole 4232 is smaller than the orthogonal projected area of the heating sheet 41 .
  • the thermally conductive layer 43 may be at least partially protruded from the adapter component 42 by the escape holes 4232 to facilitate contact with the battery cells 20 .
  • the heating device 40 provided in the embodiment of the present application can facilitate the heating plate 41 to contact the battery cell 20 directly or indirectly through the thermal conductive layer 43 by providing the avoidance hole 4232, ensuring the heat transfer requirements and satisfying the heating of the battery cell 20.
  • the heating sheet 41 is adhesively connected to the adapter component 42 .
  • the heating piece 41 and the adapter component 42 can be fixedly connected using a fluid connection glue after solidification.
  • the heating piece 41 can also be connected using solid tape such as double-sided tape.
  • the heating piece 41 and the adapter component 42 are connected by adhesive connection, which can not only ensure the connection strength between the heating piece 41 and the adapter component 42, but also eliminate the need to modify the heating piece 41.
  • Structures such as connection holes are provided on the surface to ensure the heating performance of the heating plate 41 and facilitate the construction when the two are connected.
  • the limiting groove 423 has a bottom wall 4231 that abuts the heating sheet 41, and the adapter component 42 also has a container.
  • the glue groove 424 is formed by the bottom wall 4231 being recessed in a direction away from the heating plate 41 .
  • the glue groove 424 is provided with adhesive glue, and the adhesive glue is used to connect the heating plate 41 and the adapter component 42 .
  • the shape of the limiting groove 423 may be circular, elliptical or polygonal.
  • the number of limiting grooves 423 may be one, two or more.
  • the heating device 40 provided in the embodiment of the present application can provide a glue-coating area and space by arranging a glue-containing groove 424 on the bottom wall 4231 of the limiting groove 423, which is conducive to fixing the heating piece 41 to the adapter component 42 through glue.
  • the limiting groove 423 ensures that the heating piece 41 will not move during the transfer and assembly process, which will affect the heat conduction effect and lead to uneven heating or dry burning.
  • the heating device 40 provided by the embodiment of the present application has more than two glue-containing grooves 424, and the two or more glue-containing grooves 424 are spaced apart from each other.
  • the number of glue-containing grooves 424 can be two, three or more.
  • the heating device 40 by setting the number of glue-containing grooves 424 to more than two, adhesive glue can be provided in each glue-containing groove 424, and multi-point connection is adopted, which can improve the efficiency of the heating plate.
  • the bonding area between 41 and the adapter component 42 ensures the connection strength between the two.
  • the heating device 40 provided by the embodiment of the present application has a connecting portion 422 between two adjacent adapter bodies 421 along the length direction X; In the initial state, two adjacent adapter bodies 421 are connected through the connecting portion 422; in the tensile state, the connecting portion 422 breaks, so that the two adjacent adapter bodies 421 are disconnected from each other.
  • the strength of the connecting part 422 is smaller than the strength of the adapter body 421.
  • the connection part 422 breaks before the adapter body 421, so that the two adjacent adapter bodies 421 are disconnected from each other. It is provided and capable of relative movement along with the expansion and deformation of the battery cell 20 .
  • the connecting portion 422 may be in the form of a connecting bar, a connecting block, or other structural forms.
  • the number of connecting portions 422 between two adjacent adapter bodies 421 may be one or more than two; when there are more than two connecting portions 422, they should be spaced apart from each other.
  • the heating device 40 provided in the embodiment of the present application provides a connecting part 422 between two adjacent adapter bodies 421, so that in the initial state, the two adjacent adapter bodies 421 can be connected as a whole through the connecting part 422. , can ensure the integrity of the adapter component 42 and facilitate the matching and installation between the adapter component 42, the heating plate 41 and the battery cell 20.
  • the connecting portion 422 breaks before the adapter body 421 , so that the two adjacent adapter bodies 421 are disconnected from each other and can move with the expansion of the battery cell 20 to be compatible.
  • the change in the thickness and size of the battery cell 20 prevents dry burning and ensures the safety performance of the battery.
  • the thickness of the connecting portion 422 is smaller than the thickness of the adapter body 421 .
  • the thickness direction Y and the length direction X of the heating sheet 41 are perpendicular to each other.
  • the surface of the heating sheet 41 in the thickness direction Y faces the battery cell 20 and is directly or indirectly connected to the battery cell 20 for heating the battery cell 20 .
  • the heating device 40 provided in the embodiment of the present application, by making the thickness of the connecting part 422 smaller than the thickness of the adapter body 421, can help ensure that the strength of the connecting part 422 is smaller than the strength of the adapter body 421.
  • the heating device 40 is switched from the initial state to In the stretched state, the connecting portion 422 is facilitated to break, so as to be compatible with changes in the thickness and size of the battery cell 20 .
  • the width of the connecting portion 422 is smaller than the width of the adapter body 421 .
  • the width direction Z, the length direction X and the thickness direction Y of the heating sheet 41 are perpendicular to each other.
  • the number of connecting portions 422 may be more than two.
  • the two or more connecting portions 422 are spaced apart in the width direction Z.
  • Each connecting portion 422 is connected to two adjacent adapter bodies 421 respectively.
  • a tear groove is formed between two adjacent connecting parts 422 .
  • the heating device 40 provided in the embodiment of the present application, by making the width of the connecting part 422 smaller than the width of the adapter body 421, can also help ensure that the strength of the connecting part 422 is smaller than the strength of the adapter body 421.
  • the heating device 40 is switched from the initial state When reaching the tensile state, the connecting portion 422 is facilitated to break, so as to be compatible with changes in the thickness and size of the battery cell 20 .
  • the present application also provides a battery, including a plurality of battery cells 20 and the heating device 40 described in any of the above solutions.
  • the heating sheet 41 is connected to the plurality of battery cells through an adapter component 42 20 are connected to heat multiple battery cells 20 .
  • the battery provided by the embodiment of the present application includes the heating device 40 provided by the above embodiments, which can ensure the heating requirements of the battery.
  • the connecting body 412 can be extended. It can ensure the compatibility effect with changes in thickness and size of the battery cell 20 when it expands, avoid dry burning caused by wrinkles in the heating device 40, and ensure high safety performance of the battery.
  • the present application also provides an electric device, the above-mentioned battery 100.
  • the battery 100 is used to provide electric energy for the electric device; the electric device can be any of the aforementioned devices or systems that use batteries.
  • the heating device 40 provided by the embodiment of the present application includes a heating sheet 41 , an adapter component 42 and a thermal conductive layer 43 .
  • the heating sheet 41 is used to heat the battery cell 20 .
  • the heating sheet 41 includes two More than two heating units 411, connectors 412, input terminals 413 and output terminals 414. Two or more heating units 411 are distributed along the length direction X.
  • the connector 412 is used to connect two adjacent heating units 411. Along the length direction X, connect The body 412 extends along a curved track and is stretchable along the length direction
  • the unit 411, the connector 412, the input terminal 413 and the output terminal 414 have an integrated structure.
  • the adapter component 42 is used to connect the heating sheet 41 to the battery cell 20 .
  • the adapter component 42 includes two or more adapter bodies 421 distributed along the length direction X and a connection part for connecting two adjacent adapter bodies 421 422, the number of heating units 411 is the same as the number of adapter bodies 421, and each heating unit 411 is connected to one adapter body 421.
  • the adapter component 42 has a limiting groove 423 and a glue-containing groove 424.
  • the shape of the heating piece 41 matches the shape of the limiting groove 423 and is clamped in the limiting groove 423.
  • the limiting groove 423 is used to limit the contact between the heating piece 41 and the limiting groove 423.
  • the limiting groove 423 has a bottom wall 4231 that is in contact with the heating sheet 41.
  • the adapter component 42 also has an escape hole 4232.
  • the escape hole 4232 is provided through the bottom wall 4231 along the thickness direction Y of the heater sheet 41.
  • the glue-containing groove 424 is formed by the bottom wall 4231 being recessed in the direction away from the heating plate 41.
  • the glue-containing groove 424 is provided with adhesive glue.
  • the adhesive glue is used to connect the heating plate 41 and the adapter component 42.
  • the thermal conductive layer 43 is connected to The heating sheet 41 and the thermal conductive layer 43 are used to transfer the heat of the heating sheet 41 to the battery cells 20 .
  • the thermal conductive layer 43 is an elastomer and is used to contact the battery cells 20 .
  • the heating device 40 can be switched from the initial state to the stretched state. In the initial state, along the length direction In the stretched state, along the length direction The thickness and size changes to avoid dry burning and ensure the safety performance of the battery.

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Abstract

提供一种加热装置(40)、电池(100)以及用电装置，加热装置(40)包括：加热片(41)，用于加热电池单体(20)，加热片(41)在自身长度方向上可拉伸设置；转接部件(42)，用于将加热片(41)连接于电池单体(20)，转接部件(42)包括两个以上沿长度方向分布的转接体(421)；其中，加热装置(40)能够由初始状态切换至拉伸状态；在初始状态，沿长度方向，加热片(41)的长度尺寸为第一尺寸，相邻两个转接体(421)相连接；在拉伸状态，沿长度方向，加热片(41)被拉伸且由第一尺寸伸长至第二尺寸，至少两个相邻的转接体(421)彼此断开设置。提供的加热装置(40)、电池(100)以及用电装置，加热装置(40)既能够保证对电池单体(20)的加热需求，且能够兼容电池单体(20)膨胀引起的厚度变化，避免褶皱以及干烧现象的发生，保证电池(100)的安全性能。

Description

加热装置、电池以及用电装置
相关申请的交叉引用
本申请要求享有于2022年08月15日提交的名称为“加热装置、电池以及用电装置”的中国专利申请202210971703.3的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池领域，特别涉及一种加热装置、电池以及用电装置。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。
在一些情形下的电池结构中，其内部通常设置有加热装置，以用于对电池单体进行加热处理，保证电池在低温环境中的工作需求。然而，已有的加热装置结构存在缺陷，当电池单体受热膨胀时，无法兼容电池单体膨胀引起的厚度变化，容易出现褶皱并导致干烧现象的发生，影响电池整体的安全性能。
发明内容
鉴于上述问题，本申请提供一种加热装置、电池以及用电装置，加热装置既能够保证对电池单体的加热需求，且能够兼容电池单体膨胀引起的厚度变化，避免褶皱以及干烧现象的发生，保证电池的安全性能。
第一方面，本申请提供了一种加热装置，包括：加热片，用于加热电池单体，加热片在自身长度方向上可拉伸设置；转接部件，用于将加热片连接于电池单体，转接部件包括两个以上沿长度方向分布的转接体；其中，加热装置能够由初始状态切换至拉伸状态；在初始状态，沿长度方向，加热片的长度尺寸为第一尺寸，相邻两个转接体相连接；在拉伸状态，沿长度方向，加热片被拉伸且由第一尺寸伸长至第二尺寸，至少两个相邻的转接体彼此断开设置，第二尺寸为在拉伸状态下，加热片沿长度方向上的两个端面之间的垂直距离。
本申请实施例提供的加热装置，包括加热片以及转接部件，通过转接部件能够将加热片连接于电池单体，利用加热片对电池单体进行加热，保证电池单体能够在预定温度下工作。由于加热片在自身长度方向上可拉伸设置，且转接部件包括两个以上沿长度方向分布的转接体，且加热装置能够由初始状态切换至拉伸状态，当电池单体发生膨胀时，加热装置能够由初始状态切换至拉伸状态，加热片由第一尺寸伸长至第二尺寸，且至少两个相邻的转接体彼此断开设置，能够兼容电池单体膨胀引起的厚度变化，由于加热片的伸长以及转接体的断开设置，能够避免加热片褶皱现象的发生，可始终与相应的电池单体连接，避免干烧现象的发生，保证电池的安全性能。
在一些实施例中，加热片包括两个以上加热单元以及连接体，两个以上加热单元沿长度方向分布，连接体用于连接相邻两个加热单元，连接体沿长度方向可拉伸设置，每个加热单元与一个转接体连接。
本申请实施例提供的加热装置，通过上述设置，当电池单体发生膨胀且厚度尺寸增加时，至少两个转接体断开设置并随电池单体的膨胀在长度方向上的位置发生变化，由于每个加热单元与一个转接体连接，相应的加热单元能够随转接体移动，且连接体沿长度方向可拉伸设置，当加热单元随转接体移动时，连接体可伸长设置，能够保证对电池单体在膨胀时厚度尺寸变化的兼容效果，避免加热装置发生褶皱导致干烧现象发生，提高电池的安全性能。
在一些实施例中，沿长度方向，连接体沿曲线轨迹延伸。
本申请实施例提供的加热装置，通过使得连接体沿长度方向沿曲线轨迹延伸，使得连接体可以存储一定的冗余长度，当电池单体发生膨胀导致厚度尺寸增大时，沿曲线轨迹延伸的连接体将会被拉伸伸长，以兼容电池单体的厚度尺寸变化。
在一些实施例中，沿长度方向，连接体沿折线轨迹延伸。
本申请实施例提供的加热装置，通过使得连接体沿长度方向沿折线轨迹延伸，同样可以使得连接体可以存储一定的冗余长度，当电池单体发生膨胀导致厚度尺寸增大时，沿折线轨迹延伸的连接体将会被拉伸伸长，以兼容电池单体的厚度尺寸变化。
在一些实施例中，加热单元呈多边形块状结构体。
本申请实施例提供的加热装置，通过使得加热单元呈多边块状结构体，利于成型，能够保证与转接部件之间的连接需求，同时能够提高对电池单体的加热面积，保证加热效果。
在一些实施例中，加热片还包括输入端子以及输出端子，沿长度方向位于最外侧的两个加热单元中，其中一个加热单元连接有输入端子且另一个加热单元连接有输 出端子。
本申请实施例提供的加热装置，通过设置输入端子以及输出端子，能够利于加热片与外部结构的连接，以获取能量并转换为热能在各加热单元中传输，满足对电池单体的加热需求。
在一些实施例中，加热单元、连接体、输入端子以及输出端子为一体式结构。
本申请实施例提供的加热装置，通过使得加热单元、连接体、输入端子以及输出端子呈一体式结构，既能够保证加热单元、连接体、输入端子以及输出端子之间的连接强度，同时利于加热片的成型。
在一些实施例中，加热装置还包括导热层，导热层连接于加热片，导热层用于将加热片的热量传递至电池单体。
本申请实施例提供的加热装置，通过设置导热层，能够利用导热层将加热片的热量快速且均匀地传导至电池单体，保证对电池单体的加热需求。
在一些实施例中，导热层为弹性体且用于与电池单体抵接。
本申请实施例提供的加热装置，通过使得导热层采用弹性体并用于与电池单体相抵接，使得当电池单体发生膨胀形变时，导热层能够适应电池单体的形变，始终保持与电池单体接触，保证传热效果，降低加热装置干烧的概率。并且，导热层采用弹性垫的形式，还能够避免加热装置与电池单体刚性接触，在电池运输等发生振动过程中，降低对电池单体的损伤。
在一些实施例中，转接部件具有限位槽，加热片的形状与限位槽的形状相匹配并卡接于限位槽内，限位槽用于限制加热片与转接部件的相对位置。
本申请实施例提供的加热装置，通过在转接部件上设置限位槽，能够利用限位槽实现转接部件与加热片之间的连接，同时，能够利用限位槽对加热片在安装至转接部件时的定位以及限位，保证安装需求。
在一些实施例中，限位槽具有与加热片抵接的底壁，转接部件还具有避让孔，避让孔沿加热片的厚度方向贯穿底壁设置。
本申请实施例提供的加热装置，通过设置避让孔，能够利于加热片直接或者通过导热层间接与电池单体接触，保证热量的传递需求，满足对电池单体的加热。
在一些实施例中，加热片与转接部件粘接连接。
本申请实施例提供的加热装置，加热片与转接部件之间采用粘接连接的方式，既能够保证加热片与转接部件之间的连接强度，同时无需对加热片的表面设置连接孔位等结构，保证加热片的加热性能，且利于二者连接时的施工。
在一些实施例中，限位槽具有与加热片抵接的底壁，转接部件还具有容胶槽，容胶槽由底壁向远离加热片的方向凹陷形成，容胶槽内设置有粘接胶，粘接胶用于连接加热片与转接部件。
本申请实施例提供的加热装置，通过在限位槽的底壁上设置容胶槽，能够提供涂胶区域和空间，有利于将加热片通过胶固定在转接部件的限位槽内，确保转运和装配过程中加热片不会出现窜动，影响导热效果，导致受热不均或干烧现象的发生。
在一些实施例中，容胶槽的数量为两个以上，两个以上容胶槽彼此间隔设置。
本申请实施例提供的加热装置，通过将容胶槽的数量设置为两个以上，可以在每个容胶槽内均设置粘接胶，采用多点连接的方式，能够提高加热片与转接部件之间的粘接面积，保证二者之间的连接强度。
在一些实施例中，沿长度方向，相邻两个转接体之间设置有连接部；在初始状态，相邻两个转接体通过连接部连接；在拉伸状态，连接部断裂，以使相邻两个转接体彼此断开设置。
本申请实施例提供的加热装置，通过在相邻两个转接体之间设置连接部，使得在初始状态下，相邻两个转接体能够通过连接部连接为一整体，能够保证转接部件的整体性，利于转接部件与加热片以及电池单体之间的配合安装。当电池单体膨胀形变导致厚度尺寸增大时，连接部能够先于转接体断裂，使得相邻两个转接体彼此断开并能够随电池单体的膨胀运动，以兼容电池单体厚度尺寸的变化，避免干烧现象的发生，保证电池的安全性能。
在一些实施例中，在加热片的厚度方向，连接部的厚度小于转接体的厚度。
本申请实施例提供的加热装置，通过使得连接部的厚度小于转接体的厚度，能够利于保证连接部的强度小于转接体的强度，当加热装置由初始状态切换至拉伸状态时，利于连接部断裂，以兼容电池单体厚度尺寸的变化。
在一些实施例中，在加热片的宽度方向，连接部的宽度小于转接体的宽度。
本申请实施例提供的加热装置，通过使得连接部的宽度小于转接体的宽度，同样能够利于保证连接部的强度小于转接体的强度，当加热装置由初始状态切换至拉伸状态时，利于连接部断裂，以兼容电池单体厚度尺寸的变化。
第二方面，本申请提供了一种电池，包括：多个电池单体；上述的加热装置，加热片通过转接部件与多个电池单体连接，以加热多个电池单体。
第三方面，本申请提供了一种用电装置，包括上述的电池，电池用于提供电能。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1是本申请一实施例提供的车辆的结构示意图；
图2是本申请一实施例提供的电池的结构示意图；
图3是申请一实施例提供的一种电池模块一个视角下的结构示意图；
图4是本申请一实施例提供的一种电池模块另一个视角下的结构示意图；
图5是本申请一个实施例提供的加热装置的结构示意图；
图6是本申请一个实施例提供的加热片的结构示意图；
图7是本申请另一个实施例提供的加热装置的结构示意图；
图8是本申请一个实施例提供的转接部件在一个视角下的结构示意图；
图9是本申请一个实施例提供的转接部件在另一个视角下的结构示意图；
图10是图9中A处的局部放大图；
图11是本申请一个实施例提供的转接部件的侧视图；
图12是图11中B处的局部放大图；
图13是本申请一个实施例提供的转接部件的俯视图；
图14是图13中C处的局部放大图。
具体实施方式中的附图标号如下：
其中：
1000-车辆；
100-电池；200-控制器；300-马达；
10-箱体；11-第一部分；12-第二部分；13-容纳空间；
20-电池单体；21-壳体；22-端盖组件；30-电池模块；
40-加热装置；
41-加热片；411-加热单元；412-连接体；413-输入端子；414-输出端子；
42-转接部件；421-转接体；422-连接部；423-限位槽；4231-底壁；4232-避让 孔；424-容胶槽；
43-导热层；
X-长度方向；Y-厚度方向；Z-宽度方向。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
需要注意的是，除非另有说明，本申请实施例使用的技术术语或者科学术语应当为本申请实施例所属领域技术人员所理解的通常意义。
在本申请实施例的描述中，技术术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
此外，技术术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
在本申请实施例的描述中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池模块或电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
本申请人注意到，在一些情形下电池结构中，其内部通常设置有加热装置，以用于对电池单体进行加热处理，保证电池在低温环境中的工作需求。然而，已有的加热装置结构存在缺陷，容易出现褶皱并导致干烧现象的发生，影响电池整体的安全性能。本申请人进一步研究发现，已有的加热装置通常采用印刷工艺等制备的加热膜形式，其长度方向不能延展设置，当电池单体膨胀导致厚度变化时，已有的加热装置无法兼容电池单体膨胀引起的厚度变化，使得加热装置自身容易出现褶皱，甚至出现干烧现象的发生，影响电池的安全性能。
为了缓解加热装置出现褶皱甚至干烧问题的发生，申请人研究发现，可以通过改变加热装置的结构，使其形态能够随电池单体的厚度变化而变化，以兼容电池单体膨胀引起的厚度改变。
基于以上考虑，为了解决加热装置出现褶皱甚至干烧问题的发生的问题，发明人经过深入研究，设计了一种加热装置，加热装置包括加热片以及转接部件，加热片用于加热电池单体，加热片在自身长度方向上可拉伸设置。转接部件用于将加热片连接于电池单体，转接部件包括两个以上沿长度方向分布的转接体。其中，加热装置能够由初始状态切换至拉伸状态；在初始状态，沿长度方向，加热片的长度尺寸为第一尺寸，相邻两个转接体相连接；在拉伸状态，沿长度方向，加热片被拉伸且由第一尺寸伸长至第二尺寸，至少两个相邻的转接体彼此断开设置。
在这样的电池单体中，通过转接部件能够将加热片连接于电池单体，利用加热片对电池单体进行加热，保证电池单体能够在预定温度下工作。由于加热片在自身长度方向上可拉伸设置，且转接部件包括两个以上沿长度方向分布的转接体，且加热装置能够由初始状态切换至拉伸状态，当电池单体发生膨胀时，加热装置能够由初始状态切换至拉伸状态，加热片由第一尺寸伸长至第二尺寸，且至少两个相邻的转接体彼此断开设置，能够兼容电池单体膨胀引起的厚度变化，由于加热片的伸长以及转接体 的断开设置，能够避免加热片褶皱现象的发生，可始终与相应的电池单体连接，避免干烧现象的发生，保证电池的安全性能。
本申请实施例描述的技术方案适用于电池以及使用电池的用电装置。
用电装置可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。本申请实施例对上述用电装置不做特殊限制。
应理解，本申请实施例描述的技术方案不仅仅局限适用于上述所描述的电池和用电装置，还可以适用于所有电池以及使用电池的用电装置，但为描述简洁，下述实施例均以电动车辆为例进行说明。
请参照图1，图1为本申请一些实施例提供的车辆1000的结构示意图。车辆1000可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1000的内部设置有电池100，电池100可以设置在车辆1000的底部或头部或尾部。电池100可以用于车辆1000的供电，例如，电池100可以作为车辆1000的操作电源。车辆1000还可以包括控制器200和马达300，控制器200用来控制电池100为马达300供电，例如，用于车辆1000的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池100不仅可以作为车辆1000的操作电源，还可以作为车辆1000的驱动电源，代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
请参照图2至图5，电池100包括箱体10、电池单体20以及加热装置40，电池单体20以及加热装置40容纳于箱体10内。
箱体10用于为电池单体20以及加热装置40提供容纳空间，箱体10可以采用多种结构。在一些实施例中，箱体10可以包括第一部分11和第二部分12，第一部分11与第二部分12相互盖合，第一部分11和第二部分12共同限定出用于容纳电池单体20的容纳空间13。第二部分12可以为一端开口的空心结构，第一部分11可以为板状结构，第一部分11盖合于第二部分12的开口侧，以使第一部分11与第二部分12共 同限定出容纳空间13。第一部分11和第二部分12也可以是均为一侧开口的空心结构，第一部分11的开口侧盖合于第二部分12的开口侧。当然，第一部分11和第二部分12形成的箱体10可以是多种形状，比如，圆柱体、长方体等。
在电池100中，电池单体20可以是多个，多个电池单体20之间可串联或并联或混联，混联是指多个电池单体20中既有串联又有并联。多个电池单体20之间可直接串联或并联或混联在一起，再将多个电池单体20构成的整体容纳于箱体10内。当然，电池100也可以是多个电池单体20先串联或并联或混联组成电池模块30形式，多个电池模块30再串联或并联或混联形成一个整体，并容纳于箱体10内。电池100还可以包括其他结构，例如，该电池100还可以包括汇流部件，用于实现多个电池单体之间的电连接。
其中，每个电池单体20可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。电池单体20可呈圆柱体、扁平体、长方体或其它形状等。电池单体20是指组成电池的最小单元。可选地，电池单体20包括有壳体21、电极组件以及端盖组件22。壳体具有开口，电极组件设置于壳体21内，电极组件包括极耳，端盖组件22封闭开口设置。
请参照图5，本申请实施例提供的加热装置40，包括加热片41以及转接部件42，加热片41用于加热电池单体20，加热片41在自身长度方向X上可拉伸设置，转接部件42用于将加热片41连接于电池单体20，转接部件42包括两个以上沿长度方向X分布的转接体421。其中，加热装置40能够由初始状态切换至拉伸状态。在初始状态，沿长度方向X，加热片41的长度尺寸为第一尺寸，相邻两个转接体421相连接，在拉伸状态，沿长度方向X，加热片41被拉伸且由第一尺寸伸长至第二尺寸，至少两个相邻的转接体421彼此断开设置。
可选地，转接部件42所包括的转接体421的数量可以为两个、三个甚至更多个，相邻两个转接体421相连接。
可选地，相邻两个转接体421之间的连接强度小于转接体421自身的强度。也就是说用于使得相邻两个转接体421分离设置的力小于将转接体421破坏断裂呈两部分的力。
可选地，加热片41可以至少部分与转接部件42连接，通过转接部件42将加热片41与电池单体20连接。
可选地，加热片41可以直接与电池单体20接触并加热电池单体20，当然，加热片41与电池单体20之间可以设置其他导热件，以将热量传递至电池单体20，实现 对电池单体20的加热。
可选地，加热片41可以采用电加热方式，通电能够发热。
可选地，当电池单体20受热膨胀时至预定厚度后，加热装置40可以由初始状态切换至拉伸状态。
可选地，加热片41整体可以采用拉伸能够形变的材料制成，当在长度方向X上承受超过预定范围的拉力时，能够被拉伸伸长。当然，加热片41也可以采用局部可拉伸的形态，例如可以使得加热片41局部沿长度方向X设置为曲线或者折线的形式，当在长度方向X上承受超过预定范围的拉力时，可以使得加热片41局部被拉伸伸长。
可选地，第一尺寸可以理解为在初始状态下，加热片41沿长度方向X上的两个端面之间的垂直距离。第二尺寸可以理解为在拉伸状态下，加热片41沿长度方向X上的两个端面之间的垂直距离。
可选地，初始状态可以包括加热装置40在用于电池中，电池单体20未膨胀或者膨胀使得电池单体20的厚度还在预设阈值范围内时。可选地，拉伸状态可以包括电池单体20在发生膨胀且膨胀使得电池单体20的厚度超过预设阈值范围内时。
可选地，在拉伸状态，至少两个相邻的转接体421彼此断开设置，可以理解为在拉伸状态，至少两个相邻的转接体421彼此之间分离设置，二者之间在长度方向X上可以形成有间隔。
本申请实施例提供的加热装置40，通过转接部件42能够将加热片41连接于电池单体20，利用加热片41对电池单体20进行加热，保证电池单体20能够在预定温度下工作。由于加热片41在自身长度方向X上可拉伸设置，且转接部件42包括两个以上沿长度方向X分布的转接体421，且加热装置40能够由初始状态切换至拉伸状态，当电池单体20发生膨胀时，加热装置40能够由初始状态切换至拉伸状态，加热片41由第一尺寸伸长至第二尺寸，且至少两个相邻的转接体421彼此断开设置，能够兼容电池单体20膨胀引起的厚度变化，由于加热片41的伸长以及转接体421的断开设置，能够避免加热片41褶皱现象的发生，可始终与相应的电池单体20连接，避免干烧现象的发生，保证电池的安全性能。
请参阅图6所示，在一些实施例中，加热片41包括两个以上加热单元411以及连接体412，两个以上加热单元411沿长度方向X分布，连接体412用于连接相邻两个加热单元411，连接体412沿长度方向X可拉伸设置，每个加热单元411与一个转接体421连接。
可选地，加热片41所包括的加热单元411的数量可以为两个、三个甚至更 多个。
可选地，加热单元411的数量可以与转接体421的数量相同并一一对应设置。
可选地，每个加热单元411与转接体421之间可以采用卡接、粘接等方式相互连接。
本申请实施例提供的加热装置40，通过上述设置，当电池单体20发生膨胀且厚度尺寸增加时，至少两个转接体421断开设置并随电池单体20的膨胀在长度方向X上的位置发生变化，由于每个加热单元411与一个转接体421连接，相应的加热单元411能够随转接体421移动，且连接体412沿长度方向X可拉伸设置，当加热单元411随转接体421移动时，连接体412可伸长设置，能够保证对电池单体20在膨胀时厚度尺寸变化的兼容效果，避免加热装置40发生褶皱导致干烧现象发生，提高电池的安全性能。
在一些实施例中，沿长度方向X，连接体412沿曲线轨迹延伸。
可选地，曲线轨迹沿长度方向X可以包括弧形段，相邻两个弧形段之间可以直接连接且凸出方向相反。当然，相邻两个弧形段之间也可以通过过渡段转接，此时，相关两个弧形段的凸出方向也可以相同。可选地，弧形段的凸出方向与长度方向X相交，可选为相互垂直。
本申请实施例提供的加热装置40，通过使得连接体412沿长度方向X沿曲线轨迹延伸，使得连接体412可以存储一定的冗余长度，当电池单体20发生膨胀导致厚度尺寸增大时，沿曲线轨迹延伸的连接体412将会被拉伸伸长，以兼容电池单体20的厚度尺寸变化。
在一些实施例中，沿长度方向X，连接体412沿折线轨迹延伸。
可选地，这些轨迹沿着长度方向X可以包括多个折线段，多个折线段的折弯方向可以相同，当然也可以相反。可选地，折线段的形状可以是尖角状，例如可以呈三角形状，当然，也可以呈梯形状。
本申请实施例提供的加热装置40，通过使得连接体412沿长度方向X沿折线轨迹延伸，同样可以使得连接体412可以存储一定的冗余长度，当电池单体20发生膨胀导致厚度尺寸增大时，沿折线轨迹延伸的连接体412将会被拉伸伸长，以兼容电池单体20的厚度尺寸变化。
在一些可选地实施例中，加热单元411呈多边形块状结构体。
可选地，加热单元411可以呈矩形块、五边形块、六边形块等，只要能够保 证对电池单体20的加热面积均可。
本申请实施例提供的加热装置40，通过使得加热单元411呈多边块状结构体，利于成型，能够保证与转接部件42之间的连接需求，同时能够提高对电池单体20的加热面积，保证加热效果。
在一些可选地实施例中，加热片41还包括输入端子413以及输出端子414，沿长度方向X位于最外侧的两个加热单元411中，其中一个加热单元411连接有输入端子413且另一个加热单元411连接有输出端子414。
可选地，输入端子413以及输出端子414与相应的加热单元411可以采用固定连接的方式相连接，当然，也可以采用可插拔拆卸的方式相互连接。
可选地，输入端子413可以连接于两个最外侧加热单元411中一者在长度方向X的一端，当然也可以连接于该加热单元411在与长度方向X相交方向的一端。
可选地，输出端子414可以连接于两个最外侧加热单元411中另一者在长度方向X的一端，当然也可以连接于该加热单元411在与长度方向X相交方向的一端。
本申请实施例提供的加热装置40，通过设置输入端子413以及输出端子414，能够利于加热片41与外部结构的连接，以获取能量并转换为热能在各加热单元411中传输，满足对电池单体20的加热需求。
在一些可选地实施例中，本申请实施例提供的加热装置40，加热单元411、连接体412、输入端子413以及输出端子414为一体式结构。
可选地，加热片41的材料可以包括铁铬铝电热合金等，抗氧化性强，质量轻，造价便宜。可选地，加热单元411、连接体412、输入端子413以及输出端子414可以采用一体式铸造或者及机加方式成型。
本申请实施例提供的加热装置40，通过使得加热单元411、连接体412、输入端子413以及输出端子414呈一体式结构，既能够保证加热单元411、连接体412、输入端子413以及输出端子414之间的连接强度，同时利于加热片41的成型。
请参阅图7，在一些可选地实施例中，加热装置40还包括导热层43，导热层43连接于加热片41，导热层43用于将加热片41的热量传递至电池单体20。
可选地，导热层43可以采用导热硅胶垫、具有导热性能的单组份胶膜背胶等，兼容性加强，减少粘贴不到位带来的干烧发生。
可选地，导热层43与加热片41之间可以采用粘接等方式相互连接。
可选地，导热层43可以采用绝缘材料制成，以将加热装置40与电池单体20绝缘设置。
可选地，可以在每个加热单元411上设置导热层43。
本申请实施例提供的加热装置40，通过设置导热层43，能够利用导热层43将加热片41的热量快速且均匀地传导至电池单体20，保证对电池单体20的加热需求。
在一些可选地实施例中，本申请实施例提供的加热装置40，导热层43为弹性体且用于与电池单体20抵接。
可选地，导热层43可以呈弹性垫的形式。
可选地，加热装置40在初始状态以及拉伸状态，导热层43均与电池单体20相抵接。
本申请实施例提供的加热装置40，通过使得导热层43采用弹性体并用于与电池单体20相抵接，使得当电池单体20发生膨胀形变时，导热层43能够适应电池单体20的形变，始终保持与电池单体20接触，保证传热效果，降低加热装置40干烧的概率。并且，导热层43采用弹性垫的形式，还能够避免加热装置40与电池单体20刚性接触，在电池运输等发生振动过程中，降低对电池单体20的损伤。
请参阅图8，在一些可选地实施例中，转接部件42具有限位槽423，加热片41的形状与限位槽423的形状相匹配并卡接于限位槽423内，限位槽423用于限制加热片41与转接部件42的相对位置。
可选地，限位槽423的形状与加热片41的外形轮廓相匹配。
可选地，限位槽423可以采用矩形槽等其他多边形槽。
可选地，加热片41可以部分或者全部位于限位槽423内。
可选地，限位槽423用于限制加热片41与转接部件42的相对位置可以理解为限位槽423将加热片41限制在转接部件42的预定位置，能够限制加热片41相对转接部件42运动。
本申请实施例提供的加热装置40，通过在转接部件42上设置限位槽423，能够利用限位槽423实现转接部件42与加热片41之间的连接，同时，能够利用限位槽423对加热片41在安装至转接部件42时的定位以及限位，保证安装需求。
在一些可选地实施例中，本申请实施例提供的加热装置40，限位槽423具有与加热片41抵接的底壁4231，转接部件42还具有避让孔4232，避让孔4232沿加热片41的厚度方向Y贯穿底壁4231设置。
可选地，沿厚度方向Y上，避让孔4232的正投影的面积小于加热片41的正投影面积。
可选地，当包括导热层43时，导热层43可以至少部分由避让孔4232凸出转接部件42设置，以便于与电池单体20接触。
本申请实施例提供的加热装置40，通过设置避让孔4232，能够利于加热片41直接或者通过导热层43间接与电池单体20接触，保证热量的传递需求，满足对电池单体20的加热。
在一些可选地实施例中，加热片41与转接部件42粘接连接。
可选地，加热片41与转接部件42之间可以采用流体状连接胶固化后固定连接。当然，加热片41也可以采用双面胶等固体胶带形式进行连接。
本申请实施例提供的加热装置40，加热片41与转接部件42之间采用粘接连接的方式，既能够保证加热片41与转接部件42之间的连接强度，同时无需对加热片41的表面设置连接孔位等结构，保证加热片41的加热性能，且利于二者连接时的施工。
请参阅图9以及图10，在一些可选的实施例中，本申请实施例提供的加热装置40，限位槽423具有与加热片41抵接的底壁4231，转接部件42还具有容胶槽424，容胶槽424由底壁4231向远离加热片41的方向凹陷形成，容胶槽424内设置有粘接胶，粘接胶用于连接加热片41与转接部件42。
可选地，限位槽423的形状可以呈圆形、椭圆形或者多边形。
可选地，限位槽423的数量可以为一个、两个或者更多个。
本申请实施例提供的加热装置40，通过在限位槽423的底壁4231上设置容胶槽424，能够提供涂胶区域和空间，有利于将加热片41通过胶固定在转接部件42的限位槽423内，确保转运和装配过程中加热片41不会出现窜动，影响导热效果，导致受热不均或干烧现象的发生。
在一些可选地实施例中，本申请实施例提供的加热装置40，容胶槽424的数量为两个以上，两个以上容胶槽424彼此间隔设置。
可选地，容胶槽424的数量可以为两个、三个设置更多个。
本申请实施例提供的加热装置40，通过将容胶槽424的数量设置为两个以上，可以在每个容胶槽424内均设置粘接胶，采用多点连接的方式，能够提高加热片41与转接部件42之间的粘接面积，保证二者之间的连接强度。
请参阅图11至图14所示，在一些可选地实施例中，本申请实施例提供的加热装置40，沿长度方向X，相邻两个转接体421之间设置有连接部422；在初始状态，相邻两个转接体421通过连接部422连接；在拉伸状态，连接部422断裂，以使 相邻两个转接体421彼此断开设置。
可选地，连接部422的强度小于转接体421的强度，当承受外力超过预设阈值范围时，连接部422先于转接体421断裂，使得相邻两个转接体421彼此断开设置并能够随电池单体20的膨胀形变而相对运动。
可选地，连接部422可以呈连接条、连接块等结构形式。
可选地，相邻两个转接体421之间的连接部422的数量可以为一个或两个以上；当有两个以上的连接部422时，彼此间隔设置。
本申请实施例提供的加热装置40，通过在相邻两个转接体421之间设置连接部422，使得在初始状态下，相邻两个转接体421能够通过连接部422连接为一整体，能够保证转接部件42的整体性，利于转接部件42与加热片41以及电池单体20之间的配合安装。当电池单体20膨胀形变导致厚度尺寸增大时，连接部422先于转接体421断裂，使得相邻两个转接体421彼此断开并能够随电池单体20的膨胀运动，以兼容电池单体20厚度尺寸的变化，避免干烧现象的发生，保证电池的安全性能。
请参阅图11以及图12，在一些实施例中，在加热片41的厚度方向Y，连接部422的厚度小于转接体421的厚度。
可选地，加热片41的厚度方向Y与长度方向X相互垂直。
可选地，加热片41在厚度方向Y的表面面向电池单体20并与电池单体20直接或者间接连接，用于加热电池单体20。
本申请实施例提供的加热装置40，通过使得连接部422的厚度小于转接体421的厚度，能够利于保证连接部422的强度小于转接体421的强度，当加热装置40由初始状态切换至拉伸状态时，利于连接部422断裂，以兼容电池单体20厚度尺寸的变化。
请参阅图13以及图14，在一些实施例中，在加热片41的宽度方向Z，连接部422的宽度小于转接体421的宽度。
可选地，加热片41的宽度方向Z与长度方向X、厚度方向Y两两相互垂直。
可选地，连接部422的数量可以为两个以上，两个以上连接部422在宽度方向Z间隔分布，每个连接部422分别与相邻两个转接体421连接，沿宽度方向Z，相邻两个连接部422之间形成有撕裂槽。
本申请实施例提供的加热装置40，通过使得连接部422的宽度小于转接体421的宽度，同样能够利于保证连接部422的强度小于转接体421的强度，当加热装置 40由初始状态切换至拉伸状态时，利于连接部422断裂，以兼容电池单体20厚度尺寸的变化。
根据本申请的一些实施例，本申请还提供了一种电池，包括多个电池单体20和以上任一方案所述的加热装置40，加热片41通过转接部件42与多个电池单体20连接，以加热多个电池单体20。
本申请实施例提供的电池，因包括上述各实施例提供的加热装置40，能保证对电池的加热需求，同时，当加热单元411随转接体421移动时，连接体412可伸长设置，能够保证对电池单体20在膨胀时厚度尺寸变化的兼容效果，避免加热装置40发生褶皱导致干烧现象发生，电池的安全性能高。
根据本申请的一些实施例，本申请还提供了一种用电装置，上述的电池100，电池100用于为用电装置提供电能；用电装置可以是前述任一应用电池的设备或系统。
请参阅图3至图10所示，本申请实施例提供的加热装置40，包括加热片41、转接部件42以及导热层43，加热片41用于加热电池单体20，加热片41包括两个以上加热单元411、连接体412、输入端子413以及输出端子414，两个以上加热单元411沿长度方向X分布，连接体412用于连接相邻两个加热单元411，沿长度方向X，连接体412沿曲线轨迹延伸并沿长度方向X可拉伸设置，位于最外侧的两个加热单元411中，其中一个加热单元411连接有输入端子413且另一个加热单元411连接有输出端子414，加热单元411、连接体412、输入端子413以及输出端子414为一体式结构。
转接部件42用于将加热片41连接于电池单体20，转接部件42包括两个以上沿长度方向X分布的转接体421以及用于连接相邻两个转接体421的连接部422，加热单元411的数量与转接体421的数量相同，每个加热单元411与一个转接体421连接。转接部件42具有限位槽423以及容胶槽424，加热片41的形状与限位槽423的形状相匹配并卡接于限位槽423内，限位槽423用于限制加热片41与转接部件42的相对位置，限位槽423具有与加热片41抵接的底壁4231，转接部件42还具有避让孔4232，避让孔4232沿加热片41的厚度方向Y贯穿底壁4231设置，容胶槽424由底壁4231向远离加热片41的方向凹陷形成，容胶槽424内设置有粘接胶，粘接胶用于连接加热片41与转接部件42，导热层43连接于加热片41，导热层43用于将加热片41的热量传递至电池单体20，导热层43为弹性体且用于与电池单体20抵接。加热装置40能够由初始状态切换至拉伸状态，在初始状态，沿长度方向X，加热片41的长度尺寸 为第一尺寸，相邻两个转接体421通过连接部422相连接，在拉伸状态，沿长度方向X，加热片41被拉伸且由第一尺寸伸长至第二尺寸，至少两个相邻的转接体421彼此断开设置，以适应电池单体20膨胀引起的厚度尺寸变化，避免干烧现象的发生，保证电池的安全性能。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (17)

  1. 一种加热装置，其特征在于，包括：
    加热片，用于加热电池单体，所述加热片在自身长度方向上可拉伸设置；
    转接部件，用于将所述加热片连接于所述电池单体，所述转接部件包括两个以上沿所述长度方向分布的转接体；
    其中，所述加热装置能够由初始状态切换至拉伸状态；
    在所述初始状态，沿所述长度方向，所述加热片的长度尺寸为第一尺寸，相邻两个所述转接体相连接；
    在所述拉伸状态，沿所述长度方向，所述加热片被拉伸且由所述第一尺寸伸长至第二尺寸，至少两个相邻的所述转接体彼此断开设置，所述第二尺寸为在所述拉伸状态下，所述加热片沿所述长度方向上的两个端面之间的垂直距离。
  2. 根据权利要求1所述的加热装置，其特征在于，所述加热片包括两个以上加热单元以及连接体，两个以上所述加热单元沿所述长度方向分布，所述连接体用于连接相邻两个所述加热单元，所述连接体沿所述长度方向可拉伸设置，每个所述加热单元与一个所述转接体连接。
  3. 根据权利要求2所述的加热装置，其特征在于，沿所述长度方向，所述连接体沿曲线轨迹延伸；
    或者，沿所述长度方向，所述连接体沿折线轨迹延伸。
  4. 根据权利要求2所述的加热装置，其特征在于，所述加热单元呈多边形块状结构体。
  5. 根据权利要求2所述的加热装置，其特征在于，所述加热片还包括输入端子以及输出端子，沿所述长度方向位于最外侧的两个所述加热单元中，其中一个所述加热单元连接有所述输入端子且另一个所述加热单元连接有所述输出端子。
  6. 根据权利要求5所述的加热装置，其特征在于，所述加热单元、所述连接体、所述输入端子以及所述输出端子为一体式结构。
  7. 根据权利要求1所述的加热装置，其特征在于，所述加热装置还包括导热层，所述导热层连接于所述加热片，所述导热层用于将所述加热片的热量传递至所述电池单体。
  8. 根据权利要求7所述的加热装置，其特征在于，所述导热层为弹性体且用于与所述电池单体抵接。
  9. 根据权利要求1至8任意一项所述的加热装置，其特征在于，所述转接部件具有限位槽，所述加热片的形状与所述限位槽的形状相匹配并卡接于所述限位槽内，所述限位槽用于限制所述加热片与所述转接部件的相对位置。
  10. 根据权利要求9所述的加热装置，其特征在于，所述限位槽具有与所述加热片抵接的底壁，所述转接部件还具有避让孔，所述避让孔沿所述加热片的厚度方向贯穿所述底壁设置。
  11. 根据权利要求9所述的加热装置，其特征在于，所述加热片与所述转接部件粘接连接。
  12. 根据权利要求11所述的加热装置，其特征在于，所述限位槽具有与所述加热片抵接的底壁，所述转接部件还具有容胶槽，所述容胶槽由所述底壁向远离所述加热片的方向凹陷形成，所述容胶槽内设置有粘接胶，所述粘接胶用于连接所述加热片与所述转接部件。
  13. 根据权利要求12所述的加热装置，其特征在于，所述容胶槽的数量为两个以上，两个以上所述容胶槽彼此间隔设置。
  14. 根据权利要求1至8任意一项所述的加热装置，其特征在于，沿所述长度方向，相邻两个转接体之间设置有连接部；
    在所述初始状态，相邻两个所述转接体通过所述连接部连接；
    在所述拉伸状态，所述连接部断裂，以使相邻两个所述转接体彼此断开设置。
  15. 根据权利要求14所述的加热装置，其特征在于，在所述加热片的厚度方向，所述连接部的厚度小于所述转接体的厚度；
    和/或，在所述加热片的宽度方向，所述连接部的宽度小于所述转接体的宽度。
  16. 一种电池，其特征在于，包括：
    多个电池单体；
    如权利要求1至15任意一项所述的加热装置，所述加热片通过所述转接部件与所述多个电池单体连接，以加热所述多个电池单体。
  17. 一种用电装置，其特征在于，包括如权利要求16所述的电池，所述电池用于提供电能。
PCT/CN2022/130483 2022-08-15 2022-11-08 加热装置、电池以及用电装置 WO2024036771A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN212874605U (zh) * 2020-09-11 2021-04-02 湖北亿纬动力有限公司 一种电池加热膜结构及电池模组
JP2021077583A (ja) * 2019-11-13 2021-05-20 株式会社デンソー 電池温調装置
CN113764780A (zh) * 2020-06-02 2021-12-07 郑州宇通集团有限公司 一种加热膜及使用该加热膜的电池模组
CN113906624A (zh) * 2019-06-28 2022-01-07 三洋电机株式会社 电源装置和具有该电源装置的电动车辆以及蓄电装置
CN216354437U (zh) * 2021-10-29 2022-04-19 宁德时代新能源科技股份有限公司 一种加热装置、电池及用电装置
CN115051079A (zh) * 2022-08-15 2022-09-13 江苏时代新能源科技有限公司 加热装置、电池以及用电装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3917964B2 (ja) * 2003-08-22 2007-05-23 株式会社 工房Ｐｄａ 熱圧着用のヒーターチップ
CN211629264U (zh) * 2020-04-03 2020-10-02 深圳市海科盛科技有限公司 一种低温条件下工作的锂离子电池组
CN216671768U (zh) * 2021-12-30 2022-06-03 上海瑞浦青创新能源有限公司 一种电池模组用加热片
CN216872109U (zh) * 2022-02-10 2022-07-01 宁德时代新能源科技股份有限公司 一种加热组件、电池以及用电装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113906624A (zh) * 2019-06-28 2022-01-07 三洋电机株式会社 电源装置和具有该电源装置的电动车辆以及蓄电装置
JP2021077583A (ja) * 2019-11-13 2021-05-20 株式会社デンソー 電池温調装置
CN113764780A (zh) * 2020-06-02 2021-12-07 郑州宇通集团有限公司 一种加热膜及使用该加热膜的电池模组
CN212874605U (zh) * 2020-09-11 2021-04-02 湖北亿纬动力有限公司 一种电池加热膜结构及电池模组
CN216354437U (zh) * 2021-10-29 2022-04-19 宁德时代新能源科技股份有限公司 一种加热装置、电池及用电装置
CN115051079A (zh) * 2022-08-15 2022-09-13 江苏时代新能源科技有限公司 加热装置、电池以及用电装置

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