CN104183798A - Battery monomer and battery pack - Google Patents
Battery monomer and battery pack Download PDFInfo
- Publication number
- CN104183798A CN104183798A CN201410382941.6A CN201410382941A CN104183798A CN 104183798 A CN104183798 A CN 104183798A CN 201410382941 A CN201410382941 A CN 201410382941A CN 104183798 A CN104183798 A CN 104183798A
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- China
- Prior art keywords
- battery
- lower house
- upper shell
- main body
- battery cell
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Classifications
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/138—Primary casings, jackets or wrappings of a single cell or a single battery adapted for specific cells, e.g. electrochemical cells operating at high 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
- 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
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/103—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure prismatic or rectangular
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/138—Primary casings, jackets or wrappings of a single cell or a single battery adapted for specific cells, e.g. electrochemical cells operating at high temperature
- H01M50/1385—Hybrid cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to a battery monomer. The battery monomer comprises a package structure body, a battery cell and an electrode lug, wherein the package structure body covers outside the battery cell and is used for packaging the battery cell directly, the electrode lug is connected with the battery cell and is partially exposed to the outside of the package structure body, the package structure body comprises an upper shell and a lower shell, the upper shell and the lower shell are combined mutually to form a closed space for containing the battery cell, the upper shell is made of a flexible material, the lower shell is made of a rigid material, and a battery core is formed by an anode plate, a diaphragm and a cathode plate through stacking. The invention also relates to a battery pack. The battery pack comprises a plurality of battery monomers, wherein the plurality of battery monomers are stacked with one another.
Description
Technical field
The present invention relates to a kind of battery cell and battery pack.
Background technology
The fail safe of battery is to affect the universal maximum bottleneck of accumulator car without environment pollution, and power battery pack normally by a plurality of battery cells, is connected or connection in series-parallel forms.Battery cell, according to the difference of housing, has two kinds of aluminum hull/box hat battery and flexible-packed batteries.No matter be aluminum hull/box hat battery or flexible-packed battery, its inner battery core is comprised of with stacked version anode pole piece, barrier film, cathode pole piece, for making battery have good performance, all needs battery core to compress along stacked direction.
Flexible-packed battery monomer is packed battery core with one deck aluminum plastic film conventionally, and then the mode to vacuumize, utilizes the inside and outside atm difference of packaging structure to guarantee the compression of battery core.The advantages such as flexible-packed battery has flexible design, and security performance is good, and plasticity is stronger.Yet aluminum plastic film material is softer, make whole monomer softer, shape disunity, makes flexible-packed battery be difficult in when encapsulation firm, and corner is easy to be punctured, and has reduced fail safe.Current aluminum hull/box hat battery cell is on the basis of flexible-packed battery, flexible-packed battery is sealed in a rigidity structure, and is filled with the gases such as nitrogen in the rigidity structure of sealing, to obtain the effect that battery core is compressed.It is good that aluminum hull/box hat battery has intensity, the advantage of outside simple and convenient assembly, but its plasticity is not as good as flexible-packed battery, when inside produces a large amount of gas, can not discharge internal gas more by force because of shell rigidity, and the security incident such as easily set off an explosion.
In addition, in existing flexible-packed battery monomer and aluminum hull/box hat battery cell, battery core outside is coated one deck aluminum plastic film all, lower due to the conductive coefficient of aluminum plastic film, very unfavorable to the battery cell heat radiation charging and discharging in high magnification in situation, easily cause potential safety hazard.Meanwhile, existing flexible-packed battery monomer and aluminum hull/box hat battery cell all cannot take into account simultaneously there is fixed profile size, good heat dissipation, explosion-proof feature.
Summary of the invention
In view of this, necessary provide there is fixed profile size, can efficiently radiates heat and explosion-proof battery cell and battery pack.
A kind of battery cell, comprise mounting structure, battery core and lug, it is outside that described mounting structure covers in described battery core, directly encapsulate described battery core, described lug is connected with described battery core, and part is exposed to described encapsulating structure external body, described mounting structure comprises upper shell and lower house, described upper shell and described lower house mutually combine and form a confined space for holding described battery core, the material of described upper shell is flexible material, the material of described lower house is rigid material, described battery core by anode pole piece, barrier film, cathode pole piece is stacked forms.
A battery pack, comprises a plurality of described battery cells, the setting that mutually superposes of described a plurality of battery cells.
With respect to prior art, battery cell of the present invention has following beneficial effect: with mounting structure, directly encapsulate described battery core, the integral body of described battery core does not have metallized aluminum plastic film, and lower house is made by rigid material, the coefficient of heat conduction is high, and therefore, the heat of battery operated middle generation can directly conduct to rapidly outside by described lower house, be conducive to high magnification and charge and discharge the battery heat radiation in situation, the fail safe that improves battery.Meanwhile, upper shell is made by flexible material, when cell internal pressure is increased to a certain degree, can be in weak local leakage, and decompression voluntarily, the explosion-proof performance of raising battery cell.In addition, lower house adopts rigid material, has stronger intensity, is conducive to improve the support force of whole battery cell, and the more fixing shape of formation is convenient to install.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the battery cell of first embodiment of the invention.
Fig. 2 is that the battery cell of first embodiment of the invention is along the profile of II-II line.
Fig. 3 is the STRUCTURE DECOMPOSITION figure of the battery cell of first embodiment of the invention.
Fig. 4 is the stereogram of the battery pack of first embodiment of the invention.
Fig. 5 is the rearview of the battery pack of first embodiment of the invention.
Fig. 6 is the left view of the battery pack of second embodiment of the invention.
Fig. 7 is the schematic diagram of the battery cell of second embodiment of the invention.
Fig. 8 is that the battery cell of second embodiment of the invention is along the profile of VIII-VIII line.
Fig. 9 is the STRUCTURE DECOMPOSITION figure of the battery cell of second embodiment of the invention.
Figure 10 is the stereogram of the battery pack of second embodiment of the invention.
Figure 11 is the rearview of the battery pack of second embodiment of the invention.
Figure 12 is the left view of the battery pack of second embodiment of the invention.
Figure 13 is the schematic diagram of the battery cell of third embodiment of the invention.
Figure 14 is that the battery cell of third embodiment of the invention is along the profile of XIV-XIV line.
Figure 15 is the STRUCTURE DECOMPOSITION figure of the battery cell of third embodiment of the invention.
Figure 16 is the stereogram of the battery pack of third embodiment of the invention.
Figure 17 is the profile along XVII-XVII line of the battery pack of third embodiment of the invention.
Figure 18 is the left view of the battery pack of third embodiment of the invention.
Main element symbol description
| Battery cell | 10，20，30 |
| Mounting structure | 11，21，31 |
| Battery core | 12，22，32 |
| Lug | 13，23，33 |
| Upper shell | 14，24，34 |
| The first main body | 142，242，252，342， |
| The first side plate | 144，244，254，344 |
| The second side plate | 146，246，256，346 |
| Lower house | 15，25，35 |
| Location hole | 16 |
| The second main body | 352 |
| Side | 354 |
| The 3rd side plate | 3544 |
| The 4th side plate | 3546 |
| The 5th side plate | 3548 |
| The first spatial accommodation | 36 |
| The second spatial accommodation | 38 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Below in conjunction with the accompanying drawings and the specific embodiments battery cell provided by the invention and battery pack are described in further detail.
Refer to Fig. 1 to Fig. 3, first embodiment of the invention provides a kind of battery cell 10, comprises a mounting structure 11, a battery core 12 and a lug 13.Described mounting structure 11 covers in described battery core 12 outsides, directly encapsulates described battery core 12.Described lug 13 is connected with described battery core 12, and part is exposed to described mounting structure 11 outsides.
Described mounting structure 11 comprises a upper shell 14 and a lower house 15.Described upper shell 14 and described lower house 15 mutually combine and form a confined space for holding described battery core 12.The material of described upper shell 14 is flexible material, and the material of described lower house 15 is rigid material.
Described upper shell 14 has a protruding space in the direction away from described lower house 15, and the edge in described space has outward extending side, and described side can be fixed on described lower house 15.The space of described upper shell 14 can hold at least part of described battery core 12, and the size shape in described space can be formulated according to actual needs.As long as can guarantee that described battery core 12 can be fixed in described upper shell 14 and described lower house 15 and mutually combine in the confined space forming, the quantity of described side and the shape of described side are not limit.
Refer to Fig. 2, described upper shell 14 is similar hat-shaped structure, and the periphery of described upper shell 14 is bent into " Z " type ledge structure, makes upper shell 14 have a sunk structure.Particularly, this upper shell 14 comprises the first main body 142 of rectangular plate shape, four the first side plates 144 that extend from the four edges bending of this first main body 142 respectively, and four the second side plates 146 that extend from the four edges outward of the first side plate 144 respectively.Described the first main body 142, can be one-body molded with the first side plate 144 and the second side plate 146, and form " Z " type ledge structure at the four edges of this first main body 142.Described the first side plate 144 is perpendicular to described the first main body 142, and described the second side plate 146 is parallel to described the first main body 142.Four described the first side plates 144 interconnect, and are connected with described the first main body 142 simultaneously, form a sunk structure, for carrying described battery core 12.Four described the second side plates 146 interconnect, and interconnect with four corresponding described the first side plates 144 simultaneously, and these four the second side plates 146 stretch out with respect to described the first main body 142, make described upper shell 14 become hat-shaped structure.Wherein, can be by described mounting structure 11 encapsulation in order to realize described battery core 12 integral body, described the first side plate 144 is more than or equal to the thickness of described battery core 12 in the length perpendicular in described the first main body 142 directions.
The material of described upper shell 14 is flexible material, for example, and aluminum plastic film.In the present embodiment, the material of described upper shell 14 is aluminum plastic film.Preferably, the thickness of described upper shell 14 is 0.3mm～1mm.
Described lower house 15 is a planar structure body, coordinates with described upper shell 14, forms a confined space and is used for carrying described battery core 12.Preferably, the planar structure body that described lower house 15 is a rectangular plate shape.The area of described lower house 15 is greater than the area of upper shell 14.That is, the edge of the rectangular plate shape of described lower house 15 is not covered by the edge of described second side plate 146 of described upper shell 14.The part that described lower house 15 is not covered by described second side plate 146 of described upper shell 14 can arrange location hole 16, while facilitating a plurality of battery cells 10 to be superimposed as battery pack, is fixed.
The material of described lower house 15 is rigid material, for example, is stainless steel, aluminium or magnadure.In the present embodiment, the material of described lower house 15 is aluminium.Preferably, the thickness of described lower house 15 is 0.3mm～1mm.
Further, preferably, the inner surface of described lower house 15 has insulation property.The inner surface of described lower house 15 refers to that described lower house 15 is near the surface of described battery core 12.For example, when the material of described lower house 15 is aluminium material, can obtain insulating properties through anodic oxidation; In addition, also can obtain insulating properties at the good insulating material of inner surface coated with thermally conductive of described lower house 15, as applied insulating material or PP(polypropylene) acquisition insulating properties.
Described battery core 12 by anode pole piece, barrier film, cathode pole piece is stacked forms.Described mounting structure 11 covers in described battery core 12 outsides, directly encapsulates described battery core 12.The described battery core 12 of described direct encapsulation refers to, described battery core 12 outsides only, by described mounting structure 11 encapsulation, are directly coated by described upper shell 14 and described lower house 15, no longer by other materials, are coated.More specifically, referring to does not have other encapsulating materials between described battery core 12 pole pieces and described mounting structure 11, or described battery core 12 pole pieces contact setting with the inner surface of described mounting structure 11.In described battery core 12, the material of described anode pole piece, barrier film and cathode pole piece and manufacture method can be same as the prior art.
Described lug 13 is arranged on two lip-deep any surfaces relative on described battery core 12 thickness directions, and its bearing of trend is parallel to described battery core 12 surfaces.Particularly, two relative lip-deep any surface co-planar settings on the thickness direction of described lug 13 and described battery core 12.When described mounting structure 11 encapsulates described battery core 12, preferably, described lug 13 arranges near described lower house 15.The material of described lug 13 can be aluminium foil or nickel plating Copper Foil, and the thickness of described lug 13 can be selected according to actual needs, and the thickness of lug described in present embodiment 13 is 0.2mm.
When described battery cell 10 is used, described upper shell 14 contacts with flat-type rigid face.When a plurality of described battery cells 10 are superimposed as battery pack, described upper shell 14 contacts with the described lower house 15 of adjacent described battery cell 10.Described lower house 15 is mainly used in being connected of described battery cell 10 and other peripheral fixed frame.When a plurality of described battery cells 10 are superimposed as battery pack, described lower house 15 is mainly used in the fixing of a plurality of described battery cells 10 mutual positions.
The assemble method of battery cell 10 is specially: described flexible material is struck out to described upper shell 14, described rigid material is struck out to the shape of described lower house 15, the described battery core 12 that is provided with described lug 13 is placed on described lower house 15, then the mode by thermoplastic combines described upper shell 14 and described lower house 15, form described mounting structure 11, and making described battery core 12 be encapsulated in described mounting structure 11 inside, the described lug 13 of part is exposed to described mounting structure 11 outsides for connecting external circuit.Particularly, when upper-lower casing encapsulates, after sealing part is done insulation processing with tab parcel lug 13, seal, rely on the miniature deformation realization envelope of upper shell 14 to mould, make the described lug 13 of part be exposed to described mounting structure 11 outsides for connecting external circuit.
Battery cell 10 provided by the invention has following beneficial effect: with mounting structure 11, directly encapsulate described battery core 12, the integral body of described battery core 12 does not have metallized aluminum plastic film, and lower house 15 is made by rigid material, the coefficient of heat conduction is high, therefore, the heat of battery operated middle generation can directly conduct to rapidly outside by described lower house 15, is conducive to high magnification and charges and discharge the battery heat radiation in situation, the fail safe that improves battery.Meanwhile, upper shell 14 is made by flexible material, when cell internal pressure is increased to a certain degree, can be in weak local leakage, and decompression voluntarily, the explosion-proof performance of raising battery cell 10.In addition, lower house 15 adopts rigid material, has stronger intensity, is conducive to improve the support force of whole battery cell 10, and the more fixing shape of formation is convenient to install.
In addition, refer to Fig. 4 to Fig. 6, first embodiment of the invention also provides a kind of battery pack 100.Described battery pack 100 comprises a plurality of battery cells 10 of stacked setting.Particularly, during a plurality of described battery cell 10 of stacked setting, the described upper shell 14 of a battery cell 10 contacts setting with the described lower house 15 of adjacent battery cell 10.The plurality of described battery cell 10 is by the fixing overall structure that forms of location hole 16.Particularly, can use the connection tightening members such as bolt, by location hole 16, described battery pack 100 be compressed.
Under the effect of described battery pack 100 clamping forces, can there is deformation for flexible material in described upper shell 14, and thrust is passed to battery core 12, simultaneously, to there is slight deformation in the region that described lower house 15 is corresponding with described battery core 12, in the direction of a plurality of described battery cell 10 stacks, produce displacement, the described battery core of described battery cell 10 inside 12 is compressed, guarantee that the interior positive/negative plate of battery and barrier film are in good contact condition, be beneficial to lithium ion and pass through barrier film, at positive and negative pole material, carry out Infix and desfix motion, ensure the work of battery-efficient rate.Because the inner surrounding of described mounting structure 11 has dielectric protection layer, can not cause mounting structure 11 inwalls damaged, therefore, described upper shell 14 and described lower house 15 region corresponding with described battery core 12 can not destroyed described battery core 12 during by the slight deformation of generation.
In addition, refer to Fig. 5 and Fig. 6, in described battery pack 100, the part that described lower house 15 is not covered by described battery core 12 can form radiating fin, the heat that lower house 15 can produce battery core described in battery cell 10 12 is transmitted to the fin of four sides, by scale, heat is derived to battery pack 100, the heat radiation of battery is had to positive role.By installing and connect tightening member at described location hole 16, can easily described battery pack 100 be compressed, increase the heat-transfer capability of battery pack, improve the thermal balance performance of described battery pack 100.
Refer to Fig. 7 to Fig. 9, second embodiment of the invention provides a kind of battery cell 20, comprises a mounting structure 21, a battery core 22 and a lug 23.Described mounting structure 21 covers in described battery core 22 outsides, directly encapsulates described battery core 22.Described lug 23 is connected with described battery core 22, and part is exposed to described mounting structure 21 outsides.
Described mounting structure 21 comprises a upper shell 24 and a lower house 25.Described upper shell 24 and described lower house 25 mutually combine and form a confined space for holding described battery core 22.The material of described upper shell 24 is flexible material, and the material of described lower house 25 is rigid material.
In described battery cell 20 in the present embodiment, the structure of described battery core 22, described lug 23 and described upper shell 24 and material respectively with battery cell 10 described in the first execution mode in, structure and the material of described battery core 12, described lug 13 and described upper shell 14 are identical.Be from 10 differences of battery cell described in the first execution mode: the structure of described lower house 25 and described upper shell 24 is identical but material is different, that is, the structure of the described lower house 25 in the present embodiment and described upper shell 24 is all identical with the structure of described upper shell 14 in the first embodiment; Described lug 23 is arranged in the plane at described battery core 22 thickness direction places.
Particularly, the first side plate 244 that the first main body 242, four that described upper shell 24 comprises rectangular plate shape extended from the four edges of this rectangular slab respectively, and four the second side plates 246 that extend from the four edges of the first side plate 244 respectively.The first side plate 254 that the first main body 252, four that lower house 25 comprises rectangular plate shape extended from the four edges of this rectangular slab respectively, and four the second side plates 256 that extend from the four edges of the first side plate 254 respectively.Mode by splicing, welding or metal flange parcel combines described second side plate 246 of described upper shell 24 and described second side plate 256 of described lower house 25, forms described mounting structure 21, seals described battery core 22.In addition, can be by described mounting structure 21 encapsulation in order to realize described battery core 22 integral body, described the first side plate 244 at the length perpendicular in described the first main body 242 directions and described the first side plate 254 in the length perpendicular in described the first main body 252 directions and, be more than or equal to the thickness of described battery core 22.
Described upper shell 24 is identical and symmetrical with described lower house 25 structures.In order better to encapsulate described battery core 22, described battery core 22 is not damaged, and makes full use of the space of described mounting structure 21, preferably, described lug 23 is arranged on the center of the plane on described battery core 22 thickness directions.
Described battery cell 20 provided by the invention has following beneficial effect: with mounting structure 21, directly encapsulate described battery core 22, the integral body of described battery core 22 does not have metallized aluminum plastic film, and lower house 15 is made by rigid material, the coefficient of heat conduction is high, therefore, the heat of battery operated middle generation can directly conduct to rapidly outside by described lower house 25, is conducive to high magnification and charges and discharge the battery heat radiation in situation, the fail safe that improves battery.Meanwhile, upper shell 24 is made by flexible material, when cell internal pressure is increased to a certain degree, can be in weak local leakage, and decompression voluntarily, the explosion-proof performance of raising battery cell 20.In addition, lower house 25 adopts rigid material, has stronger intensity, is conducive to improve the support force of whole battery cell 20, and the more fixing shape of formation is convenient to install.And described upper shell 24 is of similar shape with described lower house 25, manufacture method is simple; Described upper shell 24 is all hat-shaped structure with described lower house 25; effectively protecting the corner of described battery cell 20; when preventing that described battery cell 20 from being damaged by scratch, also can guarantee that described lug 23 is in the central plane of described battery cell 20, can adapt to the installation of specific (special) requirements.
In addition, refer to Figure 10 to Figure 12, second embodiment of the invention also provides a kind of battery pack 200.Described battery pack 200 comprises a plurality of described battery cell 20 of stacked setting.Particularly, during a plurality of described battery cell 20 of stacked setting, the described upper shell 24 of a battery cell 20 contacts setting with the described lower house 25 of adjacent battery cell 20.A plurality of described battery cells 20 can pass through the stacked combination of binding agent, form an overall structure.
In described battery pack 200, the lower house 25 that rigid material forms can be derived the heat of battery pack inside fast; The part formation radiating fin that the second side plate 256 of described lower house 25 is overlapping with the second side plate 246 of described upper shell 24, heat conduction to 20 of the described battery cells of described battery pack 200 has positive role, can increase the internal heat transfer ability of battery pack, improve the thermal balance performance of battery pack.
Refer to Figure 13 to Figure 15, third embodiment of the invention provides a kind of battery cell 30, comprises a mounting structure 31, a battery core 32 and a lug 33.Described mounting structure 31 covers in described battery core 32 outsides, directly encapsulates described battery core 32.Described lug 33 is connected with described battery core 32, and part is exposed to described mounting structure 31 outsides.
Described mounting structure 31 comprises a upper shell 34 and a lower house 35.Described upper shell 34 and described lower house 35 mutually combine and form a confined space for holding described battery core 32.The material of described upper shell 34 is flexible material, and the material of described lower house 35 is rigid material.The first side plate 344 that the first main body 342, four that described upper shell 34 comprises rectangular plate shape extended from the four edges of this rectangular slab respectively, and four the second side plates 346 that extend from the four edges of the first side plate 344 respectively.
In described battery cell 30 in the present embodiment, described in the structure of described battery core 32, described lug 33 and described upper shell 34 and material and the first execution mode, in battery cell 10, structure and the material of described battery core 12, described lug 13 and described upper shell 14 are all identical.Be from 10 differences of battery cell described in the first execution mode: the structure of the described lower house 15 in the structure of lower house described in the present embodiment 35 and the first execution mode is different, and lower house 15 described in the concrete combination of described lower house 35 and described upper shell 34 and the first execution mode is different with the concrete combination of described upper shell 14.
Particularly, described lower house 35 comprises the second main body 352 and three step-like sides 354 that extend from three limits of this rectangular slab respectively of rectangular plate shape.Described three sides 354 can interconnect.More specifically, described side 354 can have the 3rd side plate 3544 that is connected with described the second main body 352, away from this, state the 5th side plate 3548 of described the second main body 352, and described the 4th side plate 3546 that the 3rd side plate 3544 is connected with described the 5th side plate 3548, jointly to form this step-like described side 354.Described the 3rd side plate 3544 can be perpendicular to described the second main body 352 with described the 5th side plate 3548, and described the 4th side plate 3546 can be parallel to described the second main body 352.Described the 3rd side plate 3544 is less than or equal to the thickness of described battery core 32 in the length perpendicular in described the second main body 352 directions, be beneficial to a plurality of battery cells 30 when stacked, and two adjacent described lower houses 35 are bonded to each other fixing.
Refer to Figure 14, described lower house 35 with the concrete combination of described upper shell 34 is: described the second side plate 346 contacts setting with described the second main body 352, make described the first main body 342, described the first side plate 344 and described the second main body 352 jointly surround a confined space, for encapsulating described battery core 32; Described the first side plate 344 arranges with described side 354 intervals.
Further, refer to Figure 17, described the second main body 352 and a plurality of described the first side plate 3554 common definition one first spatial accommodations 36, a plurality of described sides 354 are the further definition of a side one second spatial accommodation 38 away from described the second main body 352 at described the first spatial accommodation 36, described the second spatial accommodation 38 matches with described the second main body 352, can when a plurality of described lower houses 35 superpose mutually, hold described second main body 352 of another identical described lower house 35.Described the first spatial accommodation 36 is for holding described battery core 32 and described upper shell 34, described the second spatial accommodation 38 holds and coordinates another identical described lower house 35 for part, is mainly described the second main body 352 and described the 3rd side plate 3544 that holds another battery cell 30.Described side 354 the length perpendicular in described the second main body 352 directions be greater than described battery core 32 and described upper shell 34 thickness and, thereby described lower house 35 can be covered in outside described battery core 32 and described upper shell 34, and further make outside the described side 354 of part that described the second spatial accommodation 38 can hold adjacent described lower house 35.Still can be mutually when the shape of described side 354 can make midfeather have two adjacent described lower houses 35 of described battery core 32 and described upper shell 34 to superpose along equidirectional against.Particularly, described in the inner side of the described side 354 of described lower house 35 and adjacent another, the outside of the described side 354 of lower house 35 leans.
Described battery cell 30 provided by the invention has following beneficial effect: with mounting structure 31, directly encapsulate described battery core 32, the integral body of described battery core 32 does not have metallized aluminum plastic film, and lower house 35 is made by rigid material, the coefficient of heat conduction is high, therefore, the heat of battery operated middle generation can directly conduct to rapidly outside by described lower house 35, is conducive to high magnification and charges and discharge the battery heat radiation in situation, the fail safe that improves battery.Meanwhile, upper shell 34 is made by flexible material, when cell internal pressure is increased to a certain degree, can be in weak local leakage, and decompression voluntarily, the explosion-proof performance of raising battery cell 30.In addition, lower house 35 adopts rigid material, has stronger intensity, is conducive to improve the support force of whole battery cell 30, and the more fixing shape of formation is convenient to install.Meanwhile, because described upper shell 34 has with described lower house 35 side plate matching, described upper shell 34 can directly fix in conjunction with forming mounting structure 31 with described lower house 35, does not need, by thermoplastic mode or adhesive bond, to have simplified operation.
In addition, refer to Figure 16 to Figure 18, third embodiment of the invention also provides a kind of battery pack 300.Described battery pack 300 comprises a plurality of described battery cell 30 of stacked setting.The plurality of battery cell 30 can pass through the stacked combination of binding agent, forms an overall structure.
A plurality of described lower house 35 of described battery pack 300 superposes along equidirectional, makes the stack setting mutually of a plurality of described battery cells 30.The direction that defines a plurality of described battery cell 30 stacks is X.When a plurality of described battery cell 30 stack, on directions X, described lower house 35 relative positions of the plurality of mutual stack are fixed, thereby described battery core 32 and the described upper shell 34 in described the first spatial accommodation 36 is fixed.That is, be separated with one between between two adjacent described the second main bodys 352 described in battery core 32 and described upper shell 34, at this directions X, described the first main body 342 contacts and fits with described second main body 352 of adjacent battery cell 30.
Under the effect of described battery pack 300 clamping forces, can there is deformation for flexible material in described upper shell 34, and thrust is passed to battery core 12, simultaneously, to there is slight deformation in the region that described lower house 35 is corresponding with described battery core 12, in the direction of a plurality of described battery cell 30 stacks, produce displacement, the described battery core of described battery cell 30 inside 32 is compressed, guarantee that the interior positive/negative plate of battery and barrier film are in good contact condition, be beneficial to lithium ion and pass through barrier film, at positive and negative pole material, carry out Infix and desfix motion, ensure the work of battery-efficient rate.Because the inner surrounding of mounting structure has dielectric protection layer, can not cause mounting structure 11 inwalls damaged, therefore, described upper shell 34 and described lower house 35 region corresponding with described battery core 32 can not destroyed described battery core 32 during by the slight deformation of generation.
In addition, described upper shell 34 has with described lower house 35 side plate matching, can form the unified described battery pack 300 of overall dimension, can easily described battery pack 300 is fixed and be compressed, the described lower house 35 that rigid material is made can be derived the heat of described battery pack 300 inside fast; The side of overlapped lower house 35 is conducive in described battery pack 300 the heat conduction of 30 of battery cells described in each, increases the heat-transfer capability of described battery pack 300 inside, improves the thermal balance performance of described battery pack 300.
In addition, those skilled in the art also can do other and change in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention, within all should being included in the present invention's scope required for protection.
Claims (12)
1. a battery cell, comprise mounting structure, battery core and lug, it is characterized in that, it is outside that described mounting structure covers in described battery core, directly encapsulate described battery core, described lug is connected with described battery core, and part is exposed to described encapsulating structure external body, described mounting structure comprises upper shell and lower house, described upper shell and described lower house mutually combine and form a confined space for holding described battery core, the material of described upper shell is flexible material, the material of described lower house is rigid material, described battery core is by anode pole piece, barrier film, the stacked composition of cathode pole piece.
2. battery cell as claimed in claim 1, is characterized in that, the material of described lower house is stainless steel, aluminium or magnadure, and described upper shell is aluminum plastic film.
3. battery cell as claimed in claim 1, is characterized in that, the inner surface of described upper shell and described lower house has insulation property.
4. battery cell as claimed in claim 1, is characterized in that, described upper shell has a protruding space in the direction away from described lower house, and the edge in described space has side, and described side is fixed on described lower house.
5. battery cell as claimed in claim 4, it is characterized in that, described upper shell comprises the first main body of rectangular plate shape, four the first side plates that extend from the four edges of described the first main body respectively, and four the second side plates that extend from the four edges of the first side plate respectively, described the first side plate is perpendicular to described the first main body, four described the first side plates interconnect, and be connected with described the first main body simultaneously, described the second side plate is parallel to described the first main body, four described the second side plates interconnect, and interconnect with four corresponding described the first side plates simultaneously, these four second side plates stretch out with respect to described the first main body.
6. battery cell as claimed in claim 1, is characterized in that, described lower house is a planar structure body.
7. battery cell as claimed in claim 1, is characterized in that, the structure of described lower house is identical with the structure of described upper shell.
8. battery cell as claimed in claim 1, is characterized in that, described lower house comprises the second main body and side, and described the second main body is rectangular slab, and the quantity of described side is three, extends respectively from three limits of described rectangular slab.
9. battery cell as claimed in claim 8, is characterized in that, described side the length perpendicular on described the second main direction be greater than described battery core and described upper shell thickness and.
10. battery cell as claimed in claim 8, it is characterized in that, described side is a step-like structure, described side comprises the 3rd side plate that is connected with described the second main body, away from the 5th side plate of described the second main body, and the 4th side plate that the 3rd side plate is connected with the 5th side plate, described the 3rd side plate and described the 5th side plate are perpendicular to described the second main body, and described the 4th side plate is parallel to described the second main body.
11. 1 kinds of battery pack, comprise a plurality of battery cells as described in any one in claim 1 to 10, the setting that mutually superposes of a plurality of described battery cells.
12. battery pack as claimed in claim 11, it is characterized in that, when the shape of described lower house makes two identical described lower houses superpose along equidirectional the inner side of the described side of a described lower house and described in another outside of the described side of lower house lean, and between the second main body of two described lower houses, there is interval, for holding described battery core and described upper shell.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410382941.6A CN104183798B (en) | 2014-08-06 | 2014-08-06 | Battery cell and battery pack |
| PCT/CN2015/082713 WO2016019769A1 (en) | 2014-08-06 | 2015-06-30 | Battery cell and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410382941.6A CN104183798B (en) | 2014-08-06 | 2014-08-06 | Battery cell and battery pack |
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| CN104183798A true CN104183798A (en) | 2014-12-03 |
| CN104183798B CN104183798B (en) | 2016-09-07 |
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| Country | Link |
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| WO (1) | WO2016019769A1 (en) |
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Also Published As
| Publication number | Publication date |
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| CN104183798B (en) | 2016-09-07 |
| WO2016019769A1 (en) | 2016-02-11 |
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