CN110492201A - Electric car and its power battery - Google Patents
Electric car and its power battery Download PDFInfo
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- CN110492201A CN110492201A CN201910818823.8A CN201910818823A CN110492201A CN 110492201 A CN110492201 A CN 110492201A CN 201910818823 A CN201910818823 A CN 201910818823A CN 110492201 A CN110492201 A CN 110492201A
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- battery pack
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 148
- 238000010438 heat treatment Methods 0.000 claims abstract description 145
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 131
- 238000000576 coating method Methods 0.000 claims description 18
- 229910002804 graphite Inorganic materials 0.000 claims description 18
- 239000010439 graphite Substances 0.000 claims description 18
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 15
- 229910052709 silver Inorganic materials 0.000 claims description 15
- 239000004332 silver Substances 0.000 claims description 15
- 230000004308 accommodation Effects 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 7
- 150000001336 alkenes Chemical class 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 2
- 206010037660 Pyrexia Diseases 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 26
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 229920002379 silicone rubber Polymers 0.000 description 4
- 239000002356 single layer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- 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
- H01M10/6554—Rods or plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
- H01M10/6555—Rods or plates arranged between the cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present invention relates to a kind of power batteries, including shell, battery pack, the second graphene heating sheet for enclosing the first graphene heating sheet around battery pack and being set to inside battery pack.First graphene heating sheet be powered after, can ecto-entad battery pack is heated.Moreover, the first graphene heating sheet surrounds circlewise and is coated on the outside of battery pack, therefore heat can internally be spread from the surrounding of battery pack.Second graphene heating sheet is held between adjacent battery core, can be from from inside to outside to battery pack heating after energization.Therefore, when power battery starting heating, it can be achieved that heat simultaneously from inside to outside and side from outside to inside be communicated up.Moreover, the first graphene heating sheet and the fever of the second graphene heating sheet whole face, heating area is big and surface temperature distribution is balanced.Therefore, above-mentioned power battery can realize internal battery core and be evenly heated.In addition, the present invention also provides a kind of electric cars.
Description
Technical field
The present invention relates to technical field of new energy, in particular to a kind of electric car and its power battery.
Background technique
With the continuous development of new-energy automobile, the power battery for energizing for electric car is also widely answered
With.Currently, most power battery is all to be assembled into battery pack using single battery.At low ambient temperatures, most of battery,
The performance of especially common lithium ion battery all can sharply decline, so that the discharge capacity and operating voltage of power battery all can
It reduces, and then using limited.Therefore, it needs first to be heated when power battery uses in low temperature environment.
Currently, common battery heating method is, in the outside coated Si rubber-heating piece in battery pack, silicon rubber heating
Piece is mainly made of resistive heater and silicon rubber, and resistive heater is wrapped in silicon rubber inner layer.It powers to resistive heater, electricity
It hinders silk and generates heat, battery is passed to by silicon rubber and is heated.However, aforesaid way heating is uneven, lead to battery
There are biggish temperature difference between body, battery with two side terminals is influenced.In addition, temperature can constantly rise after resistance wire power supply.
Once the temperature control module of battery management system breaks down, the resistance wire that temperature constantly rises can bring the wind of thermal runaway to battery
Danger, the safety so as to cause existing power battery are relatively low.
Summary of the invention
Based on this, it is necessary to provide one kind and can be realized to internal cell and be evenly heated and the higher power battery of safety.
A kind of power battery, comprising:
Shell；
Battery pack comprising multiple battery cores is accommodated and is fixed in the shell；
First graphene heating sheet of strip, around circlewise, the first graphene heating sheet is coated on the electricity
The outside of Chi Bao and along the circumferentially extending of the battery pack；And
Second graphene heating sheet of strip, be set to inside the battery pack and be held on the adjacent battery core it
Between.
The second graphene heating sheet is uniformly distributed in the inside of the battery pack in one of the embodiments,.
The first graphene heating sheet is in parallel with the second graphene heating sheet in one of the embodiments,.
The resistance value of the first graphene heating sheet is heated less than second graphene in one of the embodiments,
The resistance value of piece.
The multiple battery core is arranged in multiple row in one of the embodiments, and every two arrange between the adjacent battery core
It is clamped with the second graphene heating sheet.
In one of the embodiments, on the extending direction of the second graphene heating sheet, second graphene
The resistance value of heating sheet is successively decreased from centre to both ends.
The first graphene heating sheet includes two layers of first insulating layers and is held on described in one of the embodiments,
The surface of the first graphite ene coatings between two layers of first insulating layers, the first graphite ene coatings adds along first graphene
The longitudinally of backing is formed with the first silver paste band, and one end of the first graphene heating sheet is provided with and first silver medal
Starch the first supply lines with electrical connection；
The second graphene heating sheet includes two layers of second insulating layer and is held between two layers of second insulating layer
The second graphite ene coatings, the surface of the second graphite ene coatings is formed along the longitudinally of the second graphene heating sheet
There is the second silver paste band, and one end of the second graphene heating sheet is provided with second be electrically connected with the second silver paste band and supplies
Electric wire.
It in one of the embodiments, further include the battery management system being contained in the shell, the battery management
System is electrically connected with the battery pack, the first graphene heating sheet and the second graphene heating sheet.
It in one of the embodiments, further include being embedded at the side wall of the shell and being electrically connected just with the battery pack
Pole and negative terminal, the outer wall of the shell are provided with pole plate, and the pole plate is surrounded by the accommodation groove that middle part has partition,
The positive terminal and the negative terminal are located at the accommodation groove and are distributed in the two sides of the partition.
Above-mentioned power battery, the first graphene heating sheet be powered after, can ecto-entad battery pack is heated.Moreover,
First graphene heating sheet surrounds circlewise and is coated on the outside of battery pack, therefore heat can internally expand from the surrounding of battery pack
It dissipates.Second graphene heating sheet is held between adjacent battery core, can be from from inside to outside to battery pack heating after energization.Therefore,
When power battery starting heating, it can be achieved that heat simultaneously from inside to outside and side from outside to inside be communicated up.Moreover, first
Graphene heating sheet and the fever of the second graphene heating sheet whole face, heating area is big and surface temperature distribution is balanced.Therefore, above-mentioned
Power battery can realize internal battery core and be evenly heated.
In addition, graphene has special heat generation characteristic, when to the first graphene heating sheet and the second graphene heating sheet
After power supply, it can be rapidly heated.Moreover, being positively retained at after reaching set temperature value, this is temperature-resistant, is not in lasting liter
The situation of temperature.Therefore, even if battery management system breaks down, in battery pack temperature will not thermal runaway, be conducive in promotion
State the safety of power battery.
The present invention also provides a kind of electric car, which includes as described in any one of above preferred embodiment
Power battery.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of power battery in present pre-ferred embodiments；
Fig. 2 is the structural schematic diagram of battery pack in power battery shown in Fig. 1；
Fig. 3 is the structural schematic diagram that battery pack shown in Fig. 2 removes the first graphene heating sheet；
Fig. 4 is the structural schematic diagram of the first graphene heating sheet in power battery shown in Fig. 1；
Fig. 5 is the structural schematic diagram of the second graphene heating sheet in power battery shown in Fig. 1.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give preferred embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more saturating
It is thorough comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Referring to Fig. 1, the present invention provides a kind of electric car and power batteries 100.Wherein, electric car includes power
Battery 100, power battery 100 are used to energize for electric car.
Please refer to figs. 2 and 3 together, and the power battery 100 in present pre-ferred embodiments includes shell 110, battery pack
120, the first graphene heating sheet 130 and the second graphene heating sheet 140.
Shell 110 plays encapsulation and protective effect, can be formed by metal, plastic or other material.The shape of shell 110 can be according to dynamic
The battery compartment that power battery 100 is adapted to is designed, such as cuboid-type, cylinder or nonstandard abnormity.General shell 110 includes
Shell and cover board, shell can be connected by screw to cover board, to facilitate the inside to power battery 100 to safeguard.
Battery pack 120 includes multiple battery cores 121.Specifically, multiple battery cores 121 can be by bracket assembled at an entirety.
Multiple battery settling hole positions are pre-formed on bracket.When assembling, multiple battery cores 121 are sequentially loaded into the battery settling hole position i.e.
It can.By parallel with one another and series connection between multiple battery cores 121, the battery group knot with high voltage and larger capacity is constituted
Structure.
Specifically in the present embodiment, elder generation by M battery core 121 and is unified into a column battery core unit.Then, N number of battery core unit is simultaneously
Column are arranged and are connected, and constitute battery pack 120.Wherein, M and N is the integer greater than 1.By taking Fig. 2 as an example, M 7, N 10.
Moreover, multiple battery cores 121 can be Multi-layers distributing, it can also be monolayer distribution.That is, battery pack 120 can be single layer
Or multilayer.Battery pack 120 shown in Fig. 2 is single layer structure.
It should be pointed out that in other embodiments, according to power battery 100 to the different demands of capacity and voltage not
Together, the number of plies of the series-parallel relationship between the numerical value of above-mentioned M and N, battery core 121 and battery pack 120 can reasonably adjust.
Battery pack 120 is accommodated and is fixed in shell 110.Specifically, can be tight by the bracket of integrated battery core 121 by screw
It is fixed in the inner wall of shell 110, realizes the fixation of battery pack 120.For the ease of 120 charge and discharge of battery pack, specifically in the present embodiment
In, power battery 100 further includes the positive terminal 151 and negative terminal for being embedded at the side wall of shell 110 and being electrically connected with battery pack 120
153。
Further, in the present embodiment, the outer wall of shell 110 is provided with pole plate 111, during pole plate 111 is surrounded by
Portion has the accommodation groove of partition 1112 (figure is not marked).Positive terminal 151 and negative terminal 153 are located at accommodation groove and are distributed in partition 1112
Two sides.
Pole plate 111 can be integrally formed with shell 110, can also be separated and be passed through welding, bonding, screw threads for fastening etc. after forming
Mode is fixed on the outer wall of shell 110.The accommodation groove that pole plate 111 is formed can provide guarantor to positive terminal 151 and negative terminal 153
Shield is deformed with preventing it from being squeezed by external force.In addition, effectively positive terminal 151 can be isolated with negative terminal 153 for partition 1112,
So as to avoid short circuit risk occurs in use process.
In the present embodiment, power battery 100 further includes the battery management system (not shown) being contained in shell 110,
Battery management system is electrically connected with battery pack 120, the first graphene heating sheet 130 and the second graphene heating sheet 140.
Battery management system (BMS) acquires the information such as voltage, total current, the temperature of battery core 121 by acquisition harness.With biography
Unite power battery in BMS system function it is identical, above-mentioned battery management system can to battery pack 120 provide voltage, current monitoring with
And the functions such as battery thermal management.
Battery management system is integrated in and is conducive to keep power battery 100 compact-sized in shell 110.Moreover, having electricity
The power battery 100 of pond management system can realize plug and play, and BMS is additionally arranged on the electric car of its adaptation without requiring
The applicable scene of power battery 100 is effectively promoted in system.
Referring to Figure 4 together, the first graphene heating sheet 130 is elongated.Moreover, the first graphene heating sheet 130 is first
Tail connection, around circlewise.First graphene heating sheet 130 is coated on the outside of battery pack 120 and along the circumferential direction of battery pack 120
Extend.
Fig. 2 show single layer battery pack 120, and a first graphene heating sheet 130 can be centered around the week of battery pack 120
To.Obviously, for multi-layer cell packet 120, the quantity for increasing by the first graphene heating sheet 130 can be corresponded to, or increase by a graphite
The width of alkene heating sheet 130.
First graphene heating sheet 130 be powered after, can ecto-entad battery pack 120 is heated.Moreover, heat can be from
The surrounding of battery pack 120 is internally spread.Further, the first graphene heating sheet 130 is generated heat by grapheme material and is realized
Heating, surface heat area are big.After energization, 130 surface temperature distribution of the first graphene heating sheet is balanced, therefore battery pack 120
Around be heated more evenly.
In the present embodiment, the first graphene heating sheet 130 includes two layers first insulating layers (figure is not marked) and is held on two
The first graphite ene coatings 131 between the first insulating layer of layer, the surface of the first graphite ene coatings 131 is along the first graphene heating sheet
130 longitudinally is formed with the first silver paste band 133, and one end of the first graphene heating sheet 130 is provided with and the first silver paste
The first supply lines 135 with 133 electrical connections.
First insulating layer is generally transparent film layer, is not easily distinguishable visually, therefore diagram is not labeled the first insulating layer.
First graphite ene coatings 131 are held between two layers of first insulating layers, 131 conduction of the first graphite ene coatings is can avoid and causes
121 short circuit of battery core, promotes security performance.
Wherein, the first supply lines 135 is for connecting power supply.Specifically, the first supply lines 135 is generally and battery management system
Electrical connection.Moreover, the first silver paste band 133 by strip powers to the first graphite ene coatings 131, the first graphene can guarantee
The voltage of coating 131 everywhere is consistent, to make 130 surface temperature distribution of the first graphene heating sheet more evenly.
In addition, the both ends of the first graphene heating sheet 130 offer fixation hole 137.Band 139 is arranged in the fixation at both ends
In hole 137, the head and the tail both ends of the first graphene heating sheet 130 are linked together, form cyclic structure.Obviously, the first stone
The both ends of black alkene heating sheet 130 can also realize connection by modes such as bondings.
Please refer to fig. 5, the second graphene heating sheet 140 is elongated.Second graphene heating sheet 140 is arranged in electricity
Packet 120 inside in pond is simultaneously held between adjacent battery core 121.Second graphene heating sheet 140 and the first graphene heating sheet 130
Heat generation characteristic having the same, therefore 140 surface temperature distribution of the second graphene heating sheet is balanced.
The structure of second graphene heating sheet 140 and the first graphene heating sheet 130 are also essentially identical.Specifically in this implementation
In example, the second graphene heating sheet 140 includes two layers of second insulating layer (not shown) and is held between two layers of second insulating layer
The second graphite ene coatings 141, the longitudinally shape of the surfaces of the second graphite ene coatings 141 along the second graphene heating sheet 140
At there is the second silver paste band 143, and one end of the second graphene heating sheet 140 is provided with and is electrically connected with the second silver paste band 143
The second supply lines 145.
Wherein, the structure of second insulating layer, the second graphite ene coatings 141, the second silver paste band 143 and the second supply lines 145,
Function and material are identical as the first insulating layer, the first graphite ene coatings 131, the first silver paste band 133 and the first supply lines 135, therefore
It repeats no more.
It, can be from from inside to outside to the heating of battery pack 120 after second graphene heating sheet 140 is powered.Add with the first graphene
The cooperation of backing 130, it can be achieved that heat simultaneously from inside to outside and side from outside to inside be communicated up.Moreover, the first graphene
The whole face of heating sheet 130 and the second graphene heating sheet 140 can generate heat.Compared to traditional silicon rubber-heating piece, fever
Area is big and surface temperature distribution is balanced.Therefore, the battery core 121 in battery pack 120 is heated more evenly.
In order to keep the inside of battery pack 120 heated more evenly, specifically in the present embodiment, the second graphene heating sheet 140
It is uniformly distributed in the inside of battery pack 120.Wherein, the second graphene heating sheet 140 can be individually, can also be multiple.
Control of the course of work of first graphene heating sheet 130 and the second graphene heating sheet 140 by battery management system
System.Specifically, first passing through the temperature inside battery management system measurement battery pack 120, whether temperature value, which is lower than, is opened heating
Threshold value；When being lower than threshold value, battery management system is turned on the switch, and is heated to the first graphene heating sheet 130 and the second graphene
Piece 140 is powered, and is begun to warm up；Battery pack 120 is gradually increasing by heating temperature, when temperature rises the threshold value of shutdown heating,
Battery management system disconnects switch, and the first graphene heating sheet 130 and the second graphene heating sheet 140 stop heating, thus real
The intelligent control that existing battery pack 120 heats.
After powering to the first graphene heating sheet 130 and the second graphene heating sheet 140, it can be rapidly heated (one
As can achieve equalized temperature point within 20 seconds).Moreover, being positively retained at after reaching set temperature value, this is temperature-resistant, will not go out
The situation of existing persistently overheating.Therefore, even if battery management system breaks down, in battery pack 120 temperature will not thermal runaway, have
Conducive to the safety for promoting power battery 100.
In the present embodiment, the first graphene heating sheet 130 is in parallel with the second graphene heating sheet 140.Therefore, after energization
First graphene heating sheet 130 is identical as the voltage at 140 both ends of the second graphene heating sheet, consequently facilitating carrying out to heating process
Control.
Further, in the present embodiment, the resistance value of the first graphene heating sheet 130 is less than the second graphene heating sheet
140 resistance value.Since the first graphene heating sheet 130 is in parallel with the second graphene heating sheet 140, therefore the voltage phase of the two
Together.Therefore, small 130 calorific value of the first graphene heating sheet of resistance value is bigger.
First graphene heating sheet 130 is in 120 outside of battery pack, compared to internal 140 heat of the second graphene heating sheet
Amount is scattered and disappeared faster.Moreover, the heat losses inside battery pack 120 are slower, therefore the temperature inside battery pack 120 is generally greater than outside
Temperature.Therefore, 130 calorific value of the first graphene heating sheet is greater than the second graphene heating sheet 140, is conducive to maintain battery pack
120 inside are consistent with temperature outside.
In the present embodiment, multiple battery cores 121 are arranged in multiple row, and are clamped with second between the adjacent battery core 121 of every two column
Graphene heating sheet 140.
Specifically, battery core unit and the second graphene heating sheet 140 are alternately arranged structure inside battery pack 120,
Each second graphene heating sheet 140 can the battery core 121 to its two sides heat, therefore the second graphene heating sheet 140 is in electricity
It realizes and is uniformly distributed in pond packet 120.
When the columns of battery core unit be greater than 2 column when, the second graphene heating sheet 140 be it is multiple, multiple second graphenes add
Backing 140 is set side by side and can be parallel with one another.For shown in Fig. 2, multiple battery cores 121 are divided for 10 column battery core units.Therefore,
The quantity of two graphene heating sheets 140 is 9.
In the present embodiment, the side of battery pack 120 is additionally provided with bus bar 101, and bus bar 101 is attached at battery pack
120 side.Moreover, bus bar 101 successively supplies the second supply lines 145 and first of multiple second graphene heating sheets 140
Electric wire 135 is in parallel, and converges and be connected on battery management system.
Further, in the present embodiment, on the extending direction of the second graphene heating sheet 140, the second graphene adds
The resistance value of backing 140 is incremented by from middle part to both ends.
Specifically, the middle part of the second graphene heating sheet 140 is located at the middle part of battery pack 120, both ends are then to battery pack
120 edge extends.Second graphene heating sheet 140 is designed to nonuniformity structure.The modes such as control thickness, doping can be passed through
The resistance value in the middle part of it is set to be less than the resistance value at both ends.After energization, due to size of current phase in the second graphene heating sheet 140
Together, therefore the temperature on its surface will show decline trend from middle part to both ends.That is, inside battery pack 120,
The temperature on 140 surface of the second graphene heating sheet is lower.
It is analyzed according to front it is found that due to 121 operational heat of battery core and the difference of heat losses speed, leads to battery pack
Temperature in 120 is also to be successively decreased from middle part to edge.Therefore, after the second graphene heating sheet 140 is powered, to battery pack 120
Middle part (areas of higher temperature) transmitting heat is few, and more to 120 edge of battery pack (temperature lower region) transmitting heat, thus into
One step guarantees that the temperature inside battery pack 120 is consistent.
Above-mentioned power battery 100, the first graphene heating sheet 130 be powered after, can ecto-entad battery pack 120 is added
Heat.Moreover, the first graphene heating sheet 130 surrounds circlewise and is coated on the outside of battery pack 120, therefore heat can be from battery pack
120 surrounding is internally spread.Second graphene heating sheet 140 is held between adjacent battery core 121, can be from by interior after energization
Battery pack 120 is heated outward.Therefore, it can be achieved that heat is simultaneously from inside to outside and by when the starting of power battery 100 heating
Interior side is arrived outside to be communicated up.Moreover, the first graphene heating sheet 130 and the fever of 140 whole face of the second graphene heating sheet, fever
Area is big and its surface temperature distribution is balanced.Therefore, above-mentioned power battery 100 can realize internal battery core 121 and be evenly heated.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of power battery characterized by comprising
Shell；
Battery pack comprising multiple battery cores is accommodated and is fixed in the shell；
First graphene heating sheet of strip, around circlewise, the first graphene heating sheet is coated on the battery pack
Outside and along the circumferentially extending of the battery pack；And
Second graphene heating sheet of strip is set to inside the battery pack and is held between the adjacent battery core.
2. power battery according to claim 1, which is characterized in that the second graphene heating sheet is in the battery pack
Inside be uniformly distributed.
3. power battery according to claim 1, which is characterized in that the first graphene heating sheet and second stone
Black alkene heating sheet is in parallel.
4. power battery according to claim 3, which is characterized in that the resistance value of the first graphene heating sheet is less than
The resistance value of the second graphene heating sheet.
5. power battery according to claim 1, which is characterized in that the multiple battery core is arranged in multiple row, and every two column
The second graphene heating sheet is clamped between the adjacent battery core.
6. power battery according to claim 5, which is characterized in that in the extending direction of the second graphene heating sheet
On, the resistance value of the second graphene heating sheet is successively decreased from middle part to both ends.
7. power battery according to claim 1, which is characterized in that the first graphene heating sheet includes two layers first
Insulating layer and the first graphite ene coatings being held between two layers of first insulating layers, the surface of the first graphite ene coatings
The first silver paste band, and one end of the first graphene heating sheet are formed with along the longitudinally of the first graphene heating sheet
It is provided with the first supply lines being electrically connected with the first silver paste band；
The second graphene heating sheet include two layers of second insulating layer and be held between two layers of second insulating layer
The surface of two graphite ene coatings, the second graphite ene coatings is formed with along the longitudinally of the second graphene heating sheet
Two silver paste bands, and one end of the second graphene heating sheet is provided with the second power supply being electrically connected with the second silver paste band
Line.
8. power battery according to claim 1, which is characterized in that further include the battery management being contained in the shell
System, the battery management system and the battery pack, the first graphene heating sheet and the second graphene heating sheet
Electrical connection.
9. power battery according to claim 1, which is characterized in that further include be embedded at the shell side wall and with institute
The positive terminal and negative terminal of battery pack electrical connection are stated, the outer wall of the shell is provided with pole plate, during the pole plate is surrounded by
Portion has the accommodation groove of partition, and the positive terminal and the negative terminal are located at the accommodation groove and are distributed in the two of the partition
Side.
10. a kind of electric car, which is characterized in that including the described in any item power batteries of such as the claims 1 to 9.
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|---|---|---|---|
| CN201910818823.8A CN110492201A (en) | 2019-08-30 | 2019-08-30 | Electric car and its power battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910818823.8A CN110492201A (en) | 2019-08-30 | 2019-08-30 | Electric car and its power battery |
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| CN110492201A true CN110492201A (en) | 2019-11-22 |
Family
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