CN106654459A - Efficient uniform-temperature structure for energy storage device and preparation method of structure - Google Patents
Efficient uniform-temperature structure for energy storage device and preparation method of structure Download PDFInfo
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- CN106654459A CN106654459A CN201610985193.XA CN201610985193A CN106654459A CN 106654459 A CN106654459 A CN 106654459A CN 201610985193 A CN201610985193 A CN 201610985193A CN 106654459 A CN106654459 A CN 106654459A
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- film
- samming
- battery core
- energy storage
- sensitive adhesive
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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
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of 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
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
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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
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Abstract
The invention discloses an efficient uniform-temperature structure for an energy storage device. The efficient uniform temperature structure comprises a uniform-temperature membrane, the uniform-temperature membrane continually extends on a selected flat surface or curved surface along selected direction and sequentially contacts with at least local surfaces of electric cores in the energy storage device, the uniform-temperature membrane comprises a heat conduction layer with good heat transfer performance, the heat conduction layer continually extends along the selected direction and can be closely connected with the energy storage device, and a release agent or pressure-sensitive adhesive is distributed at contacting interfaces between the uniform-temperature membrane and the surfaces of corresponding electric cores, so that the uniform-temperature membrane is seamlessly fitted to the surfaces of corresponding electric cores. The invention further discloses a method for preparing the uniform-temperature structure for the energy storage device. According to the efficient uniform-temperature structure, uniform-temperature effect can be effectively ensured in a simple, convenient and rapid operating manner, working performance of the energy storage device is improved, and the service life of the energy storage device is prolonged.
Description
Technical field
The present invention be more particularly directed to a kind of be applied to efficient average-temperature structure of the energy storage devices such as lithium battery group and preparation method thereof,
Category new energy field.
Background technology
Lithium battery, such as lithium ion battery etc. have been widely used as a kind of important new forms of energy.However, lithium battery
When in use, also need to overcome more technical problem, for example, existing lithium ion battery is typically unsuitable directly in overheated or supercooling
Used in environment.Particularly lithium ion battery can produce in use heat because of its internal resistance reason, so as to cause battery core to produce
The larger temperature rise of life.Because battery core quantity is more in battery pack, dense arrangement, the battery core only on the outside of battery pack is easily extraneous
Air is cooled down, and internal battery core is because lacking the contact with outside air, in radiating effect extreme difference, with battery pack on the outside of battery core phase
Than the temperature rise for often forming over more than 5 DEG C, to the use of battery core greatly harm is brought.Conventional solution includes：
Mini-fan is installed in battery pack carries out forced convertion, but due to limited space in battery pack, this mode even temperature effect is very
It is undesirable；Or, below battery pack plus circulation fluid is lowered the temperature again by refrigerator, this mode effect is general and has a strong impact on electricity
The structural compactness of Chi Bao.
For this purpose, inventor proposes a kind of new energy storage device average-temperature structure, by introducing one in lithium battery group
Samming film with fabulous heat transfer property, and be allowed to be contacted with each battery core in lithium battery group, so as to regulate and control in lithium battery group
The temperature uniformity of each battery core.Then, this kind of average-temperature structure still suffers from some problems in practical application, for example, due to battery core
Between compact conformation, samming film winding constructional difficulties；Often occurring between battery core in samming film and lithium battery group cannot be tight
Often exist at the contact interface of the situation of closely connected conjunction, particularly lithium battery group inside samming film and battery core between being difficult to eliminate
Gap, the haveing functions that of these gaps causes this kind of average-temperature structure to be difficult to play completely.
The content of the invention
Present invention is primarily targeted at offer is a kind of to be applied to efficient average-temperature structure of energy storage device and preparation method thereof,
To overcome deficiency of the prior art.
To realize aforementioned invention purpose, the technical solution used in the present invention includes：
The efficient average-temperature structure that a class is applied to energy storage device is embodiments provided, including：Samming film, it is in choosing
Allocate and continuously extend along preferential direction on face or curved surface, and successively with energy storage device in each battery core at least local surfaces phase
Contact；Wherein, the samming film includes the heat-conducting layer continuously extended along the preferential direction, and the samming film with it is corresponding
Release layer or pressure-sensitive adhesive layer are also distributed with the contact interface on battery core surface, the release layer or pressure-sensitive adhesive layer are described equal for making
Warm film is seamless applying at the contact interface with corresponding battery core surface.
Further, the pressure-sensitive adhesive layer or release layer are by covering in the samming film surface and/or the battery core surface
Pressure sensitive adhesive or mould release composition.
One of preferably, the release layer or pressure-sensitive adhesive layer also include conduction powder.
In some embodiments, the samming film also includes the heating element heater combined with heat-conducting layer.
In some embodiments, also it is covered with insulating barrier on the heat-conducting layer.
The embodiment of the present invention additionally provides application and preparation in the method for the efficient average-temperature structure of energy storage device, including：
Samming film is provided, and the samming film is continuously extended along preferential direction in selected plane or curved surface, and successively
Contact with least local surfaces of each battery core in energy storage device, the samming film includes continuously extending along the preferential direction
Heat-conducting layer；
Wherein, release layer or pressure-sensitive adhesive layer are also formed with the contact interface on the samming film with corresponding battery core surface,
The release layer or pressure-sensitive adhesive layer are used to make the samming film be brought into close contact at the contact interface with each battery core.
In some embodiments, described preparation method includes：First adopt in printing, coating, spraying, spin coating at least
Pressure sensitive adhesive or mould release are put on the samming film surface and/or the battery core surface by a kind of mode, and the samming is made afterwards
Film contacts successively with least local surfaces of each battery core, so as to form institute at the contact interface in the samming film with each battery core
State release layer or pressure-sensitive adhesive layer.
In some preferably embodiment, described preparation method includes：
First pressure sensitive adhesive is put on into the samming film surface and/or the battery core surface, the samming film is made afterwards successively
Contact with least local surfaces of each battery core in energy storage device,
Apply pressure to the samming film in the samming film and corresponding battery core surface in contact, make the samming film with
Each battery core is seamless applying at the contact interface.
In some embodiments particularly preferably, described preparation method includes：
First cover mould release on the samming film surface and/or the battery core surface；
Afterwards, make to be continued to pass through between each battery core of the samming film along sigmoid curve in energy storage device, while conformal cover
It is located on the region that each battery core outer wall is contacted with the samming film, the battery core is cylinder；
Thereafter, the power to make the samming film tensioning is uniformly applied at the samming film two ends, so that the samming
Film is seamless applying at the contact interface with corresponding battery core surface.
Compared with prior art, the present invention arranges release layer by the interface of each battery core in samming film and lithium battery group
Or pressure-sensitive adhesive layer, only samming film need to can be made seamless applying at contact interface with each battery core by simple and convenient operation, from
And effect of samming film can be made to play completely, reach more preferable " samming " effect.
Description of the drawings
Fig. 1 a are a kind of structural representation of samming film in an exemplary embodiments of the invention；
Fig. 1 b are the structural representation of another kind of samming film in an exemplary embodiments of the invention；
Fig. 1 c are the structural representation of another kind of samming film in an exemplary embodiments of the invention；
Fig. 2 is one of the application schematic diagram of a kind of samming film in dynamic lithium battery in an exemplary embodiments of the invention；
Fig. 3 is two of application schematic diagram of a kind of samming film in dynamic lithium battery in an exemplary embodiments of the invention；
Fig. 4 is three of application schematic diagram of a kind of samming film in dynamic lithium battery in an exemplary embodiments of the invention；
Fig. 5 is four of application schematic diagram of a kind of samming film in dynamic lithium battery in an exemplary embodiments of the invention；
Fig. 6 is five of application schematic diagram of a kind of samming film in dynamic lithium battery in an exemplary embodiments of the invention；
Fig. 7 is six of application schematic diagram of a kind of samming film in dynamic lithium battery in an exemplary embodiments of the invention.
Specific embodiment
In view of deficiency of the prior art, inventor Jing studies for a long period of time and puts into practice in a large number, is able to propose the present invention's
Technical scheme, will be further explained as follows to the technical scheme, its implementation process and principle etc..
The one side of the embodiment of the present invention provides the efficient average-temperature structure that a class is applied to energy storage device, and its feature exists
In including：Samming film, it continuously extends on selected plane or curved surface (preferably selecting curved surface) along preferential direction, and successively with
At least local surfaces of each battery core in energy storage device contact；Wherein, the samming film includes continuous along the preferential direction
The heat-conducting layer of extension, and release layer or pressure sensitive adhesive is also distributed with the contact interface on the samming film with corresponding battery core surface
Layer, the release layer or pressure-sensitive adhesive layer be used to making the samming film with corresponding battery core surface the seamless paste at the contact interface
Close.
Further, the characteristics of samming film has ultra-thin and flexible, thickness is 1 μm～50 μm or 10 μm～1000
μm, bending does not affect performance more than million times, is applied to Li-ion batteries piles and is not take up space.
Further, the samming film has efficiently heat effect, and even temperature effect significantly, can control temperature rise in module and exist
Within 5 DEG C, and will not fail because of electric power or mechanical breakdown.
Further, the heat-conducting layer is preferably formed by the material with Thermal conductivity.For example, at least in the choosing
Determine on direction, the thermal conductivity factor of the heat-conducting layer in more than 0.1W/mK, preferably in more than 10W/mK, further preferably in 100W/
More than mK, particularly preferably in more than 500W/mK.
Further, the thickness of the heat-conducting layer is 1 μm～1000 μm, preferably 1 μm～50 μm, or preferably 10 μm
～1000 μm.
In some embodiments, the samming film also includes the heating element heater combined with heat-conducting layer, and the heat-conducting layer is extremely
It is distributed in less between the heating element heater and the energy storage device.
Further, the samming film interior can set heating element heater, and the heating element heater side connects described heat-conducting layer.At some
In embodiment, also heat-conducting layer can be all connected with heating element heater both sides, the heating element heater continuously extends along the preferential direction,
And be distributed between heat-conducting layer.
Further, the interior samming film for setting heating element heater, can not only solve the problems, such as temperature rise heterogeneity during day heat, and
Lithium ion battery not work problem can be solved during low temperature.
Wherein, the heating element heater can be planar thermal source, wire thermal source (such as heating cable etc.), can also be point-like
Thermal source, it continuous distributed, or can be intervally arranged.
In some embodiments, the heating element heater adopts heating film, and at least in the heating film and the storage
The adjacent side surface of energy device is covered with heat-conducting layer.
Further, it is adaptable to which the heating film of the present invention can be face heating film, or non-face heating film, Ke Yiwei
Low-voltage heating film (for example driving voltage can be in below 60V), or high voltage heating film；It can be flexible heater
Film, or non-flexible heating film.
It is more preferred, the heating film back to both side surface be covered with the heat-conducting layer.
Further, the heating film include resistance wire electric heating film, PTC (thermistor) electric heating film, carbon fiber or
Appointing in carbon fiber composite electric heating film, graphite and/or Graphene electric heating film, CNT electric heating film, ITO electric heating films
Anticipate one or more kinds of combinations, but not limited to this.
Wherein, described graphite electric heating film can be artificial graphite heating film, and it can be for after PI film carbonized graphites
Product, or expanded graphite calendering after product.
Wherein, the Graphene heating film can be the product after graphene dispersion coating, or the product of CVD growth
Thing；
More preferred, the heating film is selected from CNT selected from the electric heating film based on material with carbon element, the material with carbon element
And/or Graphene, it is of course possible to it is carbon fiber etc., such electric heating film based on material with carbon element has under low driving voltage and quickly rises
The characteristics such as temperature, energy-saving safe.
Further, the heat-conducting layer may be selected from fin and/or heat conducting coating.
In some embodiments, the fin is in graphite heat radiation fin, Graphene fin, metal fin
Any one or two or more combinations, preferably graphite heat radiation fin or Graphene fin.
Wherein, the thickness of the fin is preferably 10 μm～1000 μm.
Further, the graphite heat radiation fin or Graphene fin have fabulous thermal conductivity, and its thermal conductivity factor is 500
～2000W/mK.
Further, the thermal conductivity factor of the metal fin is 100～500W/mK.
Wherein, the metal fin preferably adopts metal forming, such as Copper Foil, aluminium foil etc..
In some embodiments, the thickness of the heat conducting coating is preferably 1 μm～50 μm.
In some embodiments, the thermal conductivity factor of the heat conducting coating is preferably 0.1～10W/mK.
In some embodiments, the fin can be combined by glue-line with heating element heater.For example foregoing graphites dissipate
Backing/Graphene fin, metal fin (Copper Foil, aluminium foil) etc. can be incorporated into heating film surface by glue-line etc..
Wherein, the composition material of the glue-line can be epoxy adhesive, elastic resin (such as rubber elastomer),
Can be any one or the two or more combinations in epoxy resin, acrylic resin, polyurethane resin, silica column, but
Not limited to this.
In some embodiments, the heat conducting coating can pass through at least one in printing, coating, spraying, spin coating
Mode is formed at heater element surface.
Further, the heat conducting coating can mainly by heatproof high molecule material be scattered in the macromolecular material
Conduction powder composition.
Wherein, the temperature tolerance of the heatproof high molecule material is preferably 150 DEG C～300 DEG C.For example, the heatproof high molecule
Material can be epoxy adhesive, elastic resin (such as rubber elastomer), or epoxy resin, acrylic resin,
Any one in polyurethane resin, silica column, polyimides or two or more combinations, but not limited to this；
Wherein, the particle diameter of the conduction powder is preferably 5nm～5 μm.
Wherein, the heat conducting coating can include 10～90wt% conduction powders.
Wherein, the conduction powder preferably from but it is not limited to this aluminum oxide, boron nitride, aluminium nitride, Nano diamond, anti-
One or more combination in cupric oxide powder, aluminium powder.
In some embodiments, also it is covered with insulating barrier on the heat-conducting layer.
More preferred, the thickness of the insulating barrier is 0.1～5 μm.
Further, the insulating barrier can be formed at by least one mode in printing, coating, spraying, spin coating
Heat conduction layer surface.
In some embodiments, two or more battery core of the energy storage device comprising closely arrangement, the two or more electricity
At least regional area of the outer wall of core and/or upper surface and/or lower surface is contacted with the samming film.
In some more specific embodiment, described average-temperature structure includes two samming films, two samming films
Be respectively arranged at the energy storage device back to both sides, and contact with the lateral surface of each battery core in energy storage device respectively.
In some more specifically preferred embodiment, two samming films continuously extend along waveform curved surface, and
Respectively from energy storage device back to both sides the outer wall of each battery core is coated, and cooperatively form each battery core outer wall is fully wrapped around
Structure.
In some more specifically embodiment, each battery core of the samming film along waveform curve in energy storage device
Between continue to pass through, while conformal be covered on the region that each battery core outer wall is contacted with the samming film.
More preferred, in these more specifically embodiment, the battery core is cylinder.
It is more highly preferred to, release layer is distributed with the samming film and the contact interface of each battery core.
In some more specific embodiment, it is distributed with the samming film and the contact interface of each battery core pressure-sensitive
Layer.
Wherein, the battery core can be cuboid.
In some embodiments, the thickness of the pressure-sensitive adhesive layer or release layer is preferably 0.1～10 μm；Particularly preferably
, 5 μm of the thickness ＜ of the pressure-sensitive adhesive layer or release layer.
In some embodiments, the pressure-sensitive adhesive layer or release layer are by covering in the samming film surface and/or described
The pressure sensitive adhesive on battery core surface or mould release are constituted.
Wherein, the pressure sensitive adhesive may include any one in acrylic, silica gel and PU glue, but not limited to this.
Wherein, the mould release includes any one in silicone oil mould release, fluorine modeling mould release, but not limited to this.
More preferably, the release layer or pressure-sensitive adhesive layer also include conduction powder, to make the release layer or pressure
Quick glue-line has good thermal conductivity.
Preferably, the release layer or pressure-sensitive adhesive layer include 10～90wt% conduction powders.
Preferably, the particle diameter of the conduction powder is 5nm～5 μm.
Preferably, the conduction powder may include aluminum oxide, boron nitride, aluminium nitride, Nano diamond, anti-oxidant copper powder,
One or more combination in aluminium powder, but not limited to this.
Further, the samming film located at the energy storage device inside the shell, and the samming film two ends also with it is described
Shell is fixedly connected.
In some more preferred embodiment, the samming film also connects with heat abstractor and/or refrigerating plant heat transfer
Connect, so by the samming film heat energy excessive in energy storage device can be in time transferred out of and be distributed, prevent energy storage device
Interior generation superheating phenomenon.
In some more preferred embodiment, the samming film can also be with the heater located at energy storage device periphery
Heat transfer connection, can so pass through the heat importing energy storage device that the samming film produces peripheral heater, and be allowed to
Also can normal work in low temperature environment.These heaters can be all kinds of common firing equipments.
The embodiment of the present invention additionally provides a kind of method for preparing the efficient average-temperature structure for being applied to energy storage device, bag
Include：
Samming film is provided, and the samming film is continuously extended along preferential direction in selected plane or curved surface, and successively
Contact with least local surfaces of each battery core in energy storage device, the samming film includes continuously extending along the preferential direction
Heat-conducting layer；
Wherein, release layer or pressure-sensitive adhesive layer are also formed with the contact interface on the samming film with corresponding battery core surface,
The release layer or pressure-sensitive adhesive layer are used to make the samming film be brought into close contact at the contact interface with corresponding battery core surface.
In some more specific embodiment, described preparation method includes：First using printing, coating, spraying, rotation
Pressure sensitive adhesive or mould release are put on the samming film surface and/or the battery core surface by least one mode in painting, afterwards
The samming film is set to contact with least local surfaces of each battery core successively, so as on the samming film and corresponding battery core surface
The release layer or pressure-sensitive adhesive layer are formed at contact interface.
In some more preferred embodiment, described preparation method includes：
First pressure sensitive adhesive is put on into the samming film surface and/or the battery core surface, the samming film is made afterwards successively
Contact with least local surfaces of each battery core in energy storage device,
Apply pressure to the samming film in the samming film and corresponding battery core surface in contact, make the samming film with
Corresponding battery core surface is seamless applying at the contact interface.
It is aforementioned these more in preferred embodiment, the battery core can be various forms, for example cuboid, circle
Cylindrical body etc..And it is corresponding, the samming film can be acted on (e.g., with manual compression or mould pressurizing) in appropriate external force
Under, it is brought into close contact by pressure-sensitive adhesive layer and battery core surface (as above, lower surface, the partially or fully region of outer wall).But for ease of
Apply aforesaid external force, samming film was preferably made before each battery core is assembled into into the energy storage device with cramped construction with each battery core
With reference to, or, preferably make samming film that the surface district outside energy storage device is exposed to each battery core in the energy storage device being molded
Fit in domain.
In some embodiments particularly preferably, described preparation method includes：
First cover mould release on the samming film surface and/or the battery core surface；
Afterwards, make to be continued to pass through between each battery core of the samming film along sigmoid curve in energy storage device, while conformal cover
It is located on the region that each battery core outer wall is contacted with the samming film, the battery core is cylinder；
Thereafter, the power to make the samming film tensioning is uniformly applied at the samming film two ends, so that the samming
Film is seamless applying at the contact interface with corresponding battery core surface.
In aforementioned these embodiments particularly preferably, the battery core is preferably cylindrical.Wherein, the samming film
Can before each battery core is assembled as the energy storage device with cramped construction or be assembled the energy storage device basic knot
Combined with each battery core after structure (should wherein not contain the accessory that the samming film may be prevented to continue to pass through between each battery core),
And the roughness for each battery core outer wall simultaneously has no special requirements (only need to visually observe for smooth), by it is aforesaid from
Type agent, on the one hand can utilize the lubricant effect of mould release the samming film is smoothly continued to pass through between each battery core, separately
On the one hand can also pass through certain tension force effect of mould release generation make the samming film and each battery core at contact interface more
Closely laminating, particular, it is important that after the samming film is passed through between each battery core, only need to be the two of the samming film
End uniformly applies certain tension force effect, you can be tensioned the samming film, eliminates samming film and is contacting with corresponding battery core surface
Interface gap that may be present, makes the samming film seamless applying at contact interface with corresponding battery core surface.This mode
It is simple and direct easy to operate, and can have bigger and basically identical contact surface between samming film and each battery core, therefore with more preferably
Even temperature effect.
Accordingly, the other side of the embodiment of the present invention additionally provides a class device, and it includes energy storage device and institute
That what is stated is applied to the efficient average-temperature structure of energy storage device.Described device can be the energy storage devices such as types of applications dynamic lithium battery
Device, such as electric motor car, camera, mobile phone, notebook computer etc., and not limited to this.
Accompanying drawing and some exemplary embodiments will be combined as follows the technical solution of the present invention is further explained explanation.
Refer to shown in Fig. 1 a, in a typical embodiments of the present invention, a class samming film 1 may include heat-conducting layer 11,
The heat-conducting layer 11 back to both sides can respectively cover an insulating barrier 12.
Preferably, it is real in another typical case of the present invention refering to shown in Fig. 1 b, being to improve the contact between samming film and battery core
In applying scheme, a class samming film 2 may include heat-conducting layer 11, and insulating barrier 12 can be covered on the heat-conducting layer 11, and in insulating barrier
Heat conduction pressure-sensitive adhesive layer 21 can be also covered on 12.Further, also release diaphragm 22 can be covered on the surface of pressure-sensitive adhesive layer 21, to protect
Shield not tarnished using front, and when samming film is used, can be removed release diaphragm 22 in pressure-sensitive adhesive layer 21.
Refer to shown in Fig. 1 c, in another typical embodiments of the present invention, a class samming film 3 may include heat-conducting layer
11, insulating barrier 12 can be covered on the heat-conducting layer 11, and the release coating 31 of heat conduction can be also covered on the insulating layer 12.
In aforesaid these embodiments, before the form of each part, size, material etc. may be selected from samming film
Scope described in text.For example, wherein heat-conducting layer 11 can adopt any one material, form or the structure addressed above, for example may be used
Think metal fin, graphite heat radiation fin, Graphene fin, can also be heat conducting coating etc..Preferably, graphite can be selected
Flexible conductive structure with splendid heat conductivility such as alkene fin etc., and it can also have relatively thin thickness.
Each samming film in foregoing embodiments can be integrally flexible membranous structure resistant to bending, and its integral thickness can be with
Less (thickness be 1 μm～50 μm or 10 μm～1000 μm), is beneficial to and coordinates densely arranged battery core, and less increase or
Keep the volume and weight of the energy storage device such as dynamic lithium battery, or energy storage device original structure can be adjusted
In the case of, only take up wherein intrinsic idle space, so as to for production firm it is cost-effective.
Aforementioned heat conduction pressure-sensitive adhesive layer 21 and the release coating 31 of heat conduction can include 10～90wt% conduction powders, these heat conduction
Powder may be selected from aluminum oxide, boron nitride, aluminium nitride, Nano diamond, anti-oxidant copper, aluminium powder that particle diameter is 5nm～5 μm etc..
The pressure sensitive adhesive for constituting aforementioned pressure-sensitive adhesive layer may be selected from acrylic, silica gel and PU glue etc..
The mould release for constituting aforementioned parting agent layer may be selected from silicone oil mould release, fluorine modeling mould release etc..
The samming film (the samming film addressed in including but not limited to aforementioned typical embodiments) of the present invention can adopt many
The lithium battery group such as the form of kind and dynamic lithium battery coordinates and forms average-temperature structure, for example, in the samming film and lithium battery group respectively
The way of contact of battery core includes being contacted with each battery core side S types with the side contacts of each battery core two or connects with each battery core side full-enclosed
Touch, etc..
Refer to Fig. 2 and show application state of a kind of samming film in dynamic lithium battery in first embodiment of the invention and show
It is intended to, wherein samming film is placed in the both sides of cylindrical battery core 10, and thermal conductive surface (heat-conducting layer) and the side of battery core 10 of each samming film connect
Touch.When temperature contrast increases between each battery core of dynamic lithium battery, heat is by the uniform rapidly outside transfer of thermal conductive surface and dissipates
Send out, reach the effect of each battery core samming.
Refer to Fig. 3 and show application state of a kind of samming film in dynamic lithium battery in second embodiment of the invention and show
It is intended to, wherein battery core 20 is cuboid, and samming film is essentially identical with the fit system of battery core and first embodiment.
It is that a kind of application state of samming film in dynamic lithium battery is illustrated in third embodiment of the invention to refer to Fig. 4
, along square waveform track from passing through between each rectangle battery core, the wherein thermal conductive surface (heat-conducting layer) of samming film is by electricity for figure, wherein samming film
The side wrap of core 20.When temperature contrast increases between power lithium cell electric core, heat is uniform rapidly outwards by thermal conductive surface
Shift and distribute, reach the effect of each battery core samming.
It is that a kind of application state of samming film in dynamic lithium battery is illustrated in fourth embodiment of the invention to refer to Fig. 5
Figure, two of which samming film is placed in rectangle battery core both sides, and the thermal conductive surface (heat-conducting layer) of two samming films coats the side of each battery core 20
Cooperatively form the fully wrapped around structure of each battery core outer wall between face, and two samming films.The temperature between power lithium cell electric core
When degree difference increases, heat is uniformly rapidly outwards shifted and distributed by thermal conductive surface, reaches the effect of each battery core samming.
Refer to Fig. 6 and show application state of a kind of samming film in dynamic lithium battery in fifth embodiment of the invention and show
It is intended to, two of which samming film is placed in cylindrical battery core both sides, and the thermal conductive surface (heat-conducting layer) of two samming films coats each battery core
Cooperatively form the fully wrapped around structure of each battery core outer wall between 10 sides, and two samming films.See in power lithium cell electric core
When temperature contrast increases, heat is uniformly rapidly outwards shifted and distributed by thermal conductive surface, reaches the effect of each battery core samming.
In the aforesaid first to the 5th embodiment, samming film can adopt the samming film in Fig. 1 a- Fig. 1 c shown in any one.
But it is more preferred, can select with the samming film shown in Fig. 1 b (mould release membrance protective layer therein is removed when in use).
Wherein, in the average-temperature structure in building aforementioned first, second embodiment (shown in Fig. 2-Fig. 3), only need to pass through will
Samming film there is a side surface of pressure-sensitive adhesive layer to be attached to be assembled on the side wall of each battery core of the basic structure of battery pack,
Apply appropriate pressure again, you can make the samming film reach seamless applying with corresponding battery core surface by pressure-sensitive adhesive layer.
And in the average-temperature structure in building aforementioned three, the four, the 5th embodiment (shown in Fig. 4-Fig. 6), then preferably exist
During each battery core is assembled into into the basic structure of battery pack, the side surface that samming film has pressure-sensitive adhesive layer is attached to respectively
Battery core surface, applies again afterwards appropriate pressure, you can the samming film is reached with corresponding battery core surface by pressure-sensitive adhesive layer
It is seamless applying.
It is obvious, according to the scheme shown in aforementioned first, second embodiment, then no matter for battery pack manufacturer or
For consumer, average-temperature structure can be realized by very shirtsleeve operation.And according to aforementioned three, the four, the 5th embodiment
Shown scheme, then for battery pack manufacturer, average-temperature structure also can be realized easier, and because of samming film and battery core
With bigger contact surface, thus even temperature effect more more preferable than first, second embodiment can be reached.
Fig. 7 is referred to again show application state of a kind of samming film in dynamic lithium battery in sixth embodiment of the invention
Schematic diagram, wherein samming film along S types track from passing through between each cylindrical battery core, the wherein thermal conductive surface (heat-conducting layer) of samming film
By the side wrap of battery core 10.When temperature contrast increases between power lithium cell electric core, heat is uniformly rapid by thermal conductive surface
Outwards shift and distribute, reach the effect of each battery core samming.
In the sixth embodiment, samming film can adopt the samming film in Fig. 1 a- Fig. 1 c shown in any one.
When using samming film shown in Fig. 1 a- Fig. 1 b, can refer to the scheme of the first to the 5th embodiment by samming film with
Each battery core is assembled.
Preferably, can use with the samming film shown in Fig. 1 c in the sixth embodiment.In the embodiment
In, samming film can before each battery core is assembled as the energy storage device with cramped construction or be assembled the energy storage device
Basic structure (should wherein not contain the accessory that may prevent that the samming film continues to pass through between each battery core) after with it is each
Battery core is combined, and the roughness for each battery core outer wall and is had no special requirements (only need to visually observe for smooth), logical
Cross aforesaid parting agent layer, it is possible to use the lubricant effect of mould release is made in minim gap of the samming film between each battery core
Smoothly continue to pass through, and, the certain tension force effect that can also be produced by mould release makes the samming film and each battery core
More closely fit at contact interface.
Further, after the samming film is passed through between each battery core, only need to be uniform at the two ends of the samming film
Apply certain tension force effect, you can be tensioned the samming film, elimination samming film is with corresponding battery core surface at contact interface
Gap that may be present, makes the samming film seamless applying at contact interface with corresponding battery core surface.
This mode can be simple and convenient no matter for battery pack manufacturer or consumer, realization, and samming
There can be bigger and basically identical contact surface between film and each battery core, therefore with more preferably even temperature effect.
Refer to table 1 be sixth embodiment of the invention one be embodied as in case respectively use samming film 1, samming film 2,
Samming film 3 (that is, the equal temperate zone 1,2,3 in table 1) carries out S type parcels to the cylindrical battery core in commercially available dynamic lithium battery group
Application result.Heat-conducting layer in the samming film 1, samming film 2, samming film 3 adopts the Copper Foil of about 50 μm～100 μm of thickness,
Using the PET film of about 10 μm～15 μm of thickness, pressure-sensitive adhesive layer, the thickness of parting agent layer are 2～5 μm to dielectric film.It is wherein pressure-sensitive
Glue is PU glue, and mould release is silicone oil mould release, and pressure sensitive adhesive or mould release can pass through in printing, coating, spraying, spin coating at least
A kind of mode is formed at insulating film surface.In addition, can be with 20～30wt%'s of Uniform Doped in pressure-sensitive adhesive layer or parting agent layer
Nm-class boron nitride powder etc..
Wherein, the parcel of samming film 1 region is " the first test block ", and samming film 2 wraps up region for " the second test block ", samming
The parcel of film 3 region is " the 3rd test block ", and it is " the 4th test block " not wrap up region, and ABCD tetra- is arranged in each test block
Individual temperature monitoring point, wherein ABC is located at the battery modules central area of samming film and battery pack composition, and D is located at outside battery modules
Enclose region；Battery modules are carried out with 3C chargings and 1C electric discharges, data are test result after 1.5C circulations in table 1.By experimental result
As can be seen that the temperature difference in the battery modules of parcel samming film 1 from 9.1 DEG C of sammings to 2～5 DEG C, can wrap up the electricity of samming film 2
The temperature difference that the temperature difference in the module of pond from 9.1 DEG C of sammings to 0.5～1.5 DEG C, can be wrapped up in the battery modules of samming film 3 can be from 9.1
DEG C samming is to 0.5～1.5 DEG C, and even temperature effect is notable.
It should be appreciated that above-described embodiment technology design only to illustrate the invention and feature, its object is to allow and are familiar with this
The personage of item technology will appreciate that present disclosure and implement according to this, can not be limited the scope of the invention with this.It is all
The equivalence changes made according to spirit of the invention or modification, all should be included within the scope of the present invention.
Claims (19)
1. the efficient average-temperature structure of energy storage device is applied to, it is characterised in that included：Samming film, it is in selected plane or curved surface
Continuously extend along preferential direction, and contact with least local surfaces of each battery core in energy storage device successively；Wherein, it is described equal
Warm film includes the heat-conducting layer continuously extended along the preferential direction, and in contact circle on the samming film with corresponding battery core surface
Release layer or pressure-sensitive adhesive layer are also distributed with face, the release layer or pressure-sensitive adhesive layer are used to make the samming film with corresponding battery core table
Face is seamless applying at the contact interface.
2. efficient average-temperature structure according to claim 1, it is characterised in that：The energy storage device is answered comprising closely arrangement
Several battery cores, the samming film and the outer wall of a plurality of battery cores and/or at least regional area patch of upper surface and/or lower surface
Close.
3. efficient average-temperature structure according to claim 2, it is characterised in that including two or more samming film, the two or more
Samming film continuously extends along waveform curved surface, and respectively from energy storage device back to both sides by the outer wall bag of each battery core
Cover, and cooperatively form the fully wrapped around structure of each battery core outer wall.
4. efficient average-temperature structure according to claim 2, it is characterised in that：The samming film is along waveform curve in energy storage
Continue to pass through between each battery core in device, while conformal be covered on the region that each battery core outer wall is contacted with the samming film.
5. efficient average-temperature structure according to claim 4, it is characterised in that：The battery core is cylinder.
6. the average-temperature structure according to any one of claim 1-5, it is characterised in that：The samming film and corresponding battery core table
Release layer is distributed with the contact interface in face.
7. the efficient average-temperature structure according to any one of claim 1-4, it is characterised in that：The battery core is cuboid.
8. efficient average-temperature structure according to claim 7, it is characterised in that：The samming film connects with corresponding battery core surface
Tactile interface is distributed with varistor layer.
9. the efficient average-temperature structure according to any one of claim 1-5,8, it is characterised in that：The pressure-sensitive adhesive layer or from
The thickness of type layer is 0.1～10 μm；Preferably, 5 μm of the thickness ＜ of the pressure-sensitive adhesive layer or release layer.
10. the efficient average-temperature structure according to any one of claim 1-5,8, it is characterised in that：The pressure-sensitive adhesive layer or
Release layer is made up of the pressure sensitive adhesive or mould release covered in the samming film surface and/or the battery core surface.
11. efficient average-temperature structures according to claim 10, it is characterised in that：The pressure sensitive adhesive includes acrylic, silica gel
With any one in PU glue.
12. efficient temperature structures according to claim 10, it is characterised in that：The mould release includes silicone oil mould release, fluorine
Any one in modeling mould release.
The 13. efficient average-temperature structures according to any one of claim 1-5,8, it is characterised in that：The release layer or pressure
Quick glue-line also includes conduction powder；Preferably, the release layer or pressure-sensitive adhesive layer include 10～90wt% conduction powders；It is preferred that
, the particle diameter of the conduction powder is 5nm～5 μm；Preferably, the conduction powder include aluminum oxide, boron nitride, aluminium nitride,
One or more combination in Nano diamond, anti-oxidant copper powder, aluminium powder.
14. efficient average-temperature structures according to claim 1, it is characterised in that：The samming film also includes being tied with heat-conducting layer
The heating element heater of conjunction；Or, insulating barrier is also covered with the heat-conducting layer.
15. efficient average-temperature structures according to claim 1, it is characterised in that：The samming film also with heating combined equipment, radiating
The heat transfer connection of at least one of device, refrigerating plant.
The preparation method of the 16. efficient average-temperature structures for being applied to energy storage device, it is characterised in that include：
Samming film is provided, and the samming film is continuously extended along preferential direction in selected plane or curved surface, and successively with storage
At least local surfaces of each battery core in energy device contact, and the samming film is included along leading that the preferential direction continuously extends
Thermosphere；
Wherein, release layer or pressure-sensitive adhesive layer are also formed with the contact interface on the samming film with corresponding battery core surface, it is described
Release layer or pressure-sensitive adhesive layer are used to make the samming film be brought into close contact at the contact interface with each battery core.
17. preparation methods as claimed in claim 16, it is characterised in that include：First using in printing, coating, spraying, spin coating
At least one mode pressure sensitive adhesive or mould release are put on into the samming film surface and/or the battery core surface, institute is made afterwards
State samming film to contact with least local surfaces of each battery core successively, at the contact interface in the samming film with each battery core
Form the release layer or pressure-sensitive adhesive layer.
18. preparation methods as claimed in claim 17, it is characterised in that include：
First pressure sensitive adhesive is put on into the samming film surface and/or the battery core surface, make afterwards the samming film successively with storage
At least local surfaces of each battery core in energy device contact,
Apply pressure to the samming film with corresponding battery core surface in contact in the samming film, make the samming film and each electricity
Core is seamless applying at the contact interface.
19. preparation methods as claimed in claim 17, it is characterised in that include：
First cover mould release on the samming film surface and/or the battery core surface；
Afterwards, make to be continued to pass through between each battery core of the samming film along sigmoid curve in energy storage device, while conformal be covered in
On the region that each battery core outer wall is contacted with the samming film, the battery core is cylinder；
Thereafter, uniformly apply the power to make the samming film tensioning at the samming film two ends so that the samming film with
Corresponding battery core surface is seamless applying at the contact interface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610880382 | 2016-10-09 | ||
| CN2016108803820 | 2016-10-09 |
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| CN106654459A true CN106654459A (en) | 2017-05-10 |
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| CN201610985193.XA Pending CN106654459A (en) | 2016-10-09 | 2016-10-25 | Efficient uniform-temperature structure for energy storage device and preparation method of structure |
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