CN103647105A - Power battery - Google Patents
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- CN103647105A CN103647105A CN201310689084.XA CN201310689084A CN103647105A CN 103647105 A CN103647105 A CN 103647105A CN 201310689084 A CN201310689084 A CN 201310689084A CN 103647105 A CN103647105 A CN 103647105A
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- elastic plate
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- 230000008878 coupling Effects 0.000 claims description 57
- 238000010168 coupling process Methods 0.000 claims description 57
- 238000005859 coupling reaction Methods 0.000 claims description 57
- 239000000463 material Substances 0.000 claims description 17
- 230000008859 change Effects 0.000 claims description 8
- 229920001577 copolymer Polymers 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 6
- 230000000737 periodic effect Effects 0.000 claims description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- -1 perfluoroethylene-propylene Chemical group 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 12
- 230000004888 barrier function Effects 0.000 description 9
- 230000010261 cell growth Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 206010016766 flatulence Diseases 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 229910001290 LiPF6 Inorganic materials 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N NMP Substances CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a power battery. The power battery comprises a cell and a shell surrounding the outside of the cell; the power battery further comprises an elastic plate which is arranged between the cell and the shell, due to the adoption of the elastic plate, variable tension exists between the cell and the shell, so as to adjust the distance between a positive pole piece and a negative pole piece in the cell. According to the power battery, due to the adoption of the elastic plate, the tightness in the battery can be adjusted in time according to the actual charge and discharge situations, so as to effectively improve the situation of changed assembling ratios caused by the expansion of the battery, and therefore, the usability of the battery is improved. At the same time, due to the effective control to the assembling ratio, the thickness of the shell when the battery is at a discharge peak value can be reduced, and thus the size of the battery is controlled effectively.
Description
Technical field
The present invention relates to battery technology field, particularly a kind of electrokinetic cell.
Background technology
Day by day perfect along with technology, the universal huge business opportunity that lies dormant of pure electric automobile, this just has higher requirement to large capacity vehicle mounted dynamic battery, the quality of its performance, particularly inside battery capacity usage ratio occupies an important position.
The common battery of structure of battery is divided into sealing cell and open-type battery by opening mode, and for lithium-ion-power cell, it belongs to sealing cell.Along with slimming and the lightweight of electronic product, according to the needs of power consumption equipment and space, to battery, assembling is very important than carrying out reasonable design, and meanwhile, the assembling of battery is compared directly affects the performance of battery.
For lithium-ion-power cell, mainly battery core and housing and crowded ear, consist of, wherein, battery core is comprised of positive plate, negative plate, barrier film, electrolyte.The assembling mode major part that lithium-ion-power cell adopts is at present to be combined into an integral body by one or more battery cores, and within putting into the housing of battery.
The assembling ratio of battery, namely the elasticity of battery core is very large, concrete on battery performance impact, and the elasticity of battery core is presented as the distance size between positive/negative plate.When the elasticity tension of battery core, the distance between positive/negative plate is less, is unfavorable for the process and assemble of battery, and pole plate, barrier film are wetting more difficult, and discharge voltage is low, and capacity is low; When the elasticity of battery core is crossed pine, the distance between positive/negative plate is larger, has not only reduced specific capacity, also can make battery excessive expansion, affects battery life.
In order to assemble according to suitable assembling comparison battery, people consider that the mode of calculating by theory is to assembling than estimating, for example, according to volume core thickness, calculate assembling ratio with the business of inner chamber body thickness, yet, assembling in actual production has relation than negative pole system (negative plate bounce-back), chemical synthesis technology, equipment actual pressure with battery and the factor such as whether vacuumize, and therefore, only relies on simple theory calculating to be difficult to draw accurate conclusion.
In addition, because the area of the square casing side of high-capacity lithium-ion power battery is larger, therefore its meteorism resistent ability is poor, when battery expands, the battery pole piece of battery core inside can not get strong constraint, now can cause pole piece too loose, ionic conduction power between pole piece reduces, the utilance that can cause active material is on the low side, the contraction bulging of pole piece in battery charge and discharge process, cause surface very easily to go offline, cycle life shortens, affect safety, in order to improve expansion issues, elasticity in the time of can adjustment assembly, yet, if pole piece is too tight, can produce and be difficult to into shell again, assembling is inconvenient, and pole plate, barrier film is wetting more difficult, discharge voltage is low, the problems such as capacity is low.
Summary of the invention
The invention provides a kind of electrokinetic cell, for solving the electrokinetic cell of prior art, because cell expansion affects, cause the assembling ratio of battery to change, and the problem of the battery performance further causing decline.
In order to realize foregoing invention object, the invention provides a kind of electrokinetic cell, the housing that comprises battery core and be enclosed in described battery core outside,
Described electrokinetic cell also comprises elastic plate, and described elastic plate is arranged between described battery core and described housing, and described elastic plate makes to have variable tension force between described battery core and described housing, to adjust positive plate in described battery core and the distance between negative plate.
Preferably, the number of described elastic plate is 2, and 2 elastic plates are oppositely arranged on respectively between described surface of shell long-pending maximum side and battery core; And/or,
Described elastic plate produces the direction of deformation perpendicular to the surface of positive/negative plate in described battery core, thereby tension force that deformation produces can be acted on positive/negative plate effectively, with the distance between positive/negative plate, regulates.
Preferably, described elastic plate comprises planar section and coupling part, the outside of described planar section and described battery core fits, described coupling part is connected to the two ends of described planar section, and one end of described coupling part is connected to described planar section, the other end of described coupling part contacts with described housing;
Wherein, the employing of described coupling part can produce elastically-deformable material and make, so that the thickness of described elastic plate can change with the distance in gap between the deformation of described battery core or described battery core and described housing, thereby regulate positive plate in described battery core and the distance between negative plate.
Preferably, described coupling part is flat shape; Or,
Described coupling part is curve form, and described planar section and described coupling part are tangent connection.
Preferably, described elastic plate comprises the first planar section, the second planar section and coupling part, wherein,
The outside of described the first planar section and described battery core fits, and the inner side of described the second planar section and described housing fits;
Described coupling part is connected between described the first planar section and the second planar section, or one section is connected to described the first planar section and the other end contacts with the inner side of described housing;
Wherein, the employing of described coupling part can produce elastically-deformable material and make, so that the thickness of described elastic plate can change with the distance in gap between the deformation of described battery core or described battery core and described housing, thereby adjust positive plate in described battery core and the distance between negative plate.
Preferably, described coupling part is flat shape; Or,
Described coupling part is curve form, and between described coupling part and described the first planar section for being tangently connected, be tangent connection between described coupling part and described the second planar section.
Preferably, described the first planar section, the second planar section and coupling part form a continuous periodic structure, and described elastic plate comprises a plurality of above-mentioned periodic structures.
Preferably, described coupling part adopts metal material or plastic material to make.
Preferably, described metal material is stainless steel 304 or titanium alloy T R90.
Preferably, described plastic material is a kind of in perfluoroethylene-propylene (copolymer) PFA, ethene, TFE copolymer FEP or Kynoar FEP.
Beneficial effect of the present invention comprises:
By electrokinetic cell provided by the invention, between housing in battery and battery core, elastic plate is set, in battery charge and discharge process, when causing due to cell expansion in battery core that the distance between positive/negative plate becomes large, the squeezing action that elastic plate is subject to battery core produces deformation, because elastic plate becomes large to the tension force of battery core when there is deformation, therefore this tension force plays constraint effect by the positive/negative plate in battery core, under the constraint effect of mentioned strain, thereby elastic plate will push battery core reduces the distance between positive/negative plate, thereby increase elasticity.Therefore, according to the expansion situation in battery charge and discharge process, battery core can be pushed the elastic plate of its both sides automatically, thereby makes the elastic plate of both sides according to actual charge status, in time the inner elasticity of regulating cell.Therefore,, by elastic plate is set in electrokinetic cell, can effectively improves the assembling ratio causing due to cell expansion and occur situation about changing, thereby improve the serviceability of battery.Meanwhile, the effective control due to assembling ratio, has suppressed the expansion that battery occurs in charge and discharge process, can reduce the thickness of battery housing when electric discharge peak value, therefore, makes the size of battery obtain effective control.
In addition, electrokinetic cell provided by the invention, in the process of processing, changes less with respect to original battery processing technology, only need to increase the process of assembling elastic plate, simple to operation, and the scope of application is extensive, can be widely applicable in the production of big-and-middle-sized electrokinetic cell.
Accompanying drawing explanation
The structural representation of a kind of lithium-ion-power cell that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the another kind of lithium-ion-power cell that Fig. 2 provides for the embodiment of the present invention;
The structural representation of another lithium-ion-power cell that Fig. 3 provides for the embodiment of the present invention.
Embodiment
For making those skilled in the art understand better technical scheme of the present invention, the electrokinetic cell embodiment of the present invention being provided below in conjunction with accompanying drawing is described in detail.
The invention provides a kind of electrokinetic cell, to improve the assembling ratio being caused due to cell expansion, occur situation about changing, effectively to assembling than controlling, thus the serviceability of raising battery.In the embodiment of the present invention, the electrokinetic cell of take is illustrated as lithium-ion-power cell as example, and in addition, electrokinetic cell is other electrokinetic cells of Ni-MH power cell and so on for example also.
The embodiment of the present invention provides a kind of lithium-ion-power cell, refers to Fig. 1, the structural representation of the lithium-ion-power cell providing for the embodiment of the present invention.As shown in Figure 1, described lithium-ion-power cell comprises battery core 100, is enclosed in housing 200 and the lug 300 in described battery core 100 outsides; Described battery core 100 comprises positive plate, negative plate, barrier film, and electrolyte; Wherein, positive plate, barrier film and negative plate adopt coiling or stacked system arrangement to be connected, and barrier film is interval between adjacent positive plate, negative plate; Battery core 100 is connected to power consumption equipment by being arranged at the lug 300 on housing 200 surfaces.Described lithium-ion-power cell also comprises elastic plate 400, described elastic plate 400 is arranged between described battery core 100 and described housing 200, described elastic plate 400 makes to have variable tension force between described battery core 100 and described housing 200, in the process discharging and recharging at described lithium-ion-power cell, adjust positive plate in described battery core 100 and the distance between negative plate.
In the embodiment of the present invention, elastic plate 400 is arranged between battery core 100 and housing 200, when there is the situation of expansion in battery, elastic plate 400 is subject to the squeezing action of battery core 100 and produces distortion, and therefore, it is large that the tension force of 400 pairs of battery cores 100 of elastic plate becomes, thereby the positive/negative plate in battery core 100 is played to certain constraint effect, under the constraint effect of mentioned strain, can improve the problem that originally caused the distance between positive/negative plate to increase due to cell expansion, thereby improve the serviceability of battery.
In the embodiment of the present invention, the number of elastic plate 400 can be more than 1 or 1.Preferably, the number of described elastic plate 400 is 2, and 2 elastic plates 400 are oppositely arranged on respectively between described surface of shell long-pending maximum side and battery core.In lithium-ion-power cell, for the larger side of surface area, the ability of its anti-expansion is poor, when the situation of expansion appears in battery in its use procedure, the change of distance between positive/negative plate is larger, larger on the serviceability impact of battery, therefore, by two sides in battery table area maximum, elastic plate is set, can more effectively improves the assembling ratio causing due to cell expansion and occur situation about changing, thereby improve the serviceability of battery.When the volume of lithium-ion-power cell is larger, when the poor side of its anti-swelliong power is more, also can elastic plate be set respectively in above-mentioned a plurality of sides.In addition, for the tension force that elastic plate 400 deformation produce can be regulated the distance between positive/negative plate effectively, the component of the tension force that elastic plate 400 produces due to deformation in the perpendicular direction in the surface with positive/negative plate is greater than 0.Preferably, elastic plate 400 produces the direction of deformation perpendicular to the surface of positive/negative plate, thereby tension force that deformation produces can be acted on positive/negative plate most effectively, with the distance between positive/negative plate, regulates.
Below in conjunction with Figure of description, the structure of embodiment of the present invention Elastic plate 400 is described.
As shown in Figure 1, elastic plate 400 comprises planar section 10 and coupling part 20, described planar section 10 fits with the outside of described battery core 100, described coupling part 20 is connected to the two ends of described planar section 10, and one end of described coupling part 20 is connected to described planar section 10, the other end of described coupling part 20 contacts with described housing 200; Wherein, 20 employings of described coupling part can produce elastically-deformable material and make, so that the thickness of elastic plate 400 can change with the distance in gap between the deformation of described battery core 100 or described battery core 100 and described housing 200, thereby adjust positive plate in described battery core 100 and the distance between negative plate, wherein thickness refers to the width that elastic plate 400 has in the direction perpendicular to planar section 10, as shown in D1 in Fig. 1, the side namely arranging at elastic plate 400 places, the distance between the outside of battery core 100 and the inner side of housing 200.
As shown in Figure 1, described coupling part 20 is flat shape.In addition, coupling part 20 also can adopt other shape.Refer to Fig. 2, the structural representation of the another kind of lithium-ion-power cell providing for the embodiment of the present invention, as shown in Figure 2, coupling part 20 is curve form, and described planar section 10 and described coupling part 20 are tangent connection.By the coupling part of flat shape, avoided the contact-making surface between elastic plate and battery core too sharp-pointed, also avoided due to sharp-pointed the caused risk that may puncture battery core inner pole piece, thus the practicality and the fail safe that have improved elastic plate.
Refer to Fig. 3, the structural representation of another lithium-ion-power cell providing for the embodiment of the present invention, as shown in Figure 3, elastic plate 400 comprises the first planar section 40, the second planar section 50 and coupling part 60, wherein, described the first planar section 40 fits with the outside of described battery core 100, and described the first planar section 40 fits with the inner side of described housing 200; Described coupling part 60 is connected between described the first planar section 40 and the second planar section 50, or one section is connected to described the first planar section 40 and the other end contacts with the inner side of described housing 200; Wherein, described coupling part 60 adopts and can produce elastically-deformable material and make, so that the thickness of elastic plate 400 can change with the distance in gap between the deformation of described battery core 100 or described battery core 100 and described housing 200.When the less thick of elastic plate 400, the tension force of 400 pairs of battery cores 100 of elastic plate will become large, thereby the positive/negative plate in battery core 100 is played to certain constraint effect, under the constraint effect of mentioned strain, can improve the problem that originally caused the distance between positive/negative plate to increase due to cell expansion, in the situation that battery core 100 expands, the tension force that the deformation of elastic plate 400 provides can reduce positive plate in described battery core 100 and the distance between negative plate, thereby suppressed to assemble in battery the variation of ratio, improved the serviceability of battery.
In Fig. 3, take described coupling part 60, to be flat shapes be illustrated as example.In addition, coupling part 60 can be also other shapes, and for example, coupling part 60 can be curve form, and between coupling part 60 and described the first planar section 40 for being tangently connected, be tangent connection between coupling part 60 and described the second planar section 50.
Preferably, as shown in Figure 3, in elastic plate 400, can comprise a plurality of periodic structures, each periodic structure comprises above-mentioned the first planar section 40, the second planar section 50 and coupling part 60.
Need to illustrate, the structure of the elastic plate 400 in the embodiment of the present invention shown in Fig. 1 to Fig. 3 is only exemplary illustration, and under the prerequisite of function that realizes elastic plate 400, elastic plate 400 can adopt other structure.
The embodiment of the present invention, preferably, described coupling part adopts metal material or plastic material to make.At elastic plate, by deformation, provide in the process of variable tension force, the part that deformation occurs is mainly the coupling part in elastic plate, can there is not deformation in its planar section (comprising above-mentioned the first planar section and the second planar section), therefore, coupling part in elastic plate need adopt and can produce elastically-deformable material, produce elastically-deformable material and can produce deformation being squeezed, and return to original shape when extruding disappears.In addition, for the convenience of processing, planar section in elastic plate (comprising above-mentioned the first planar section and the second planar section) can adopt identical material with coupling part, in addition, the planar section in elastic plate (comprising above-mentioned the first planar section and the second planar section) also can adopt other material.
Preferably, above-mentioned metal material is stainless steel 304 or titanium alloy T R90; Above-mentioned plastic material is a kind of in perfluoroethylene-propylene (copolymer) PFA, ethene, TFE copolymer FEP or Kynoar FEP.
In addition, elastic plate can produce deformation being squeezed, its shape becomes thickness and reduces, and is appreciated that when thickness of elastic plates reduces, its length (length in the direction vertical with thickness direction, as shown in D2 in Fig. 1) will become large, therefore, when elastic plate is set, between the two ends of elastic plate and the inner side of housing, need a reserved gap, thereby provide space for the deformation of elastic plate.
In the embodiment of the present invention, can adopt graphite as negative material, be mixed and made into by a certain percentage cathode size with water, conductive agent, binding agent etc., coat Copper Foil and make negative plate; Can adopt LiFePO4 as positive electrode, be mixed and made into by a certain percentage anode sizing agent with NMP, conductive agent, binding agent etc., coat aluminium foil and make positive plate, the membrane for polymer that barrier film adopts PP, PE to make, electrolyte solute is LiPF6, and solvent is the mixture of DEC and DMC.Adopt coiling or stacked system to arrange positive plate, barrier film and negative plate and be connected, barrier film is interval between adjacent positive plate, negative plate, through lamination, makes battery core.Battery Theoretical Design capacity is 45Ah.The in the situation that of elastic plate be not set in lithium-ion-power cell retrain, after injecting electrolyte, there is the process of de-embedding with reaction in battery core, the battery container bulging causing should be in 5%-10% left and right, because the area of the square-shaped battery casing broad side surface of high-capacity lithium-ion power battery is larger, meteorism resistent ability is poor, therefore battery pole piece can not get strong constraint, if reduce assembling ratio, inside battery pole piece is too loose, ionic conduction power between pole piece reduces, the utilance that can cause active material is on the low side, and the thermal effect of battery charging and discharging is excessive.By the lithium-ion-power cell that adopts the embodiment of the present invention to provide, elastic plate is set in battery to be fettered the distance between positive/negative plate, in battery charge and discharge process, when occurring expanding and causing elasticity to diminish (it is large that the distance between positive/negative plate becomes), elastic plate can push battery core, reduce the distance between positive/negative plate, thereby increase elasticity.Therefore, according to the expansion situation in battery charge and discharge process, battery core can be pushed the elastic plate of its both sides automatically, thereby makes the elastic plate of both sides according to actual charge status, in time the inner elasticity of regulating cell.Adopt the battery capacity of the lithium-ion-power cell of structure as shown in Figure 1 can reach 45.5Ah, the internal resistance of cell is less than 0.8m Ω, batch production qualification rate is more than 96%, and during this lithium-ion-power cell 3C electric discharge, than original-pack distribution pond, (other parameters are identical, but elastic plate is not set) electric discharge peak value time housing thickness low about 4mm, therefore, the size that is arranged so that battery by elastic plate has obtained effective control.
Be understandable that, above execution mode is only used to principle of the present invention is described and the illustrative embodiments that adopts, yet the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (10)
1. an electrokinetic cell, the housing that comprises battery core and be enclosed in described battery core outside, is characterized in that,
Described electrokinetic cell also comprises elastic plate, and described elastic plate is arranged between described battery core and described housing, and described elastic plate makes to have variable tension force between described battery core and described housing, to adjust positive plate in described battery core and the distance between negative plate.
2. electrokinetic cell as claimed in claim 1, is characterized in that,
The number of described elastic plate is 2, and 2 elastic plates are oppositely arranged on respectively between described surface of shell long-pending maximum side and battery core; And/or,
Described elastic plate produces the direction of deformation perpendicular to the surface of positive/negative plate in described battery core, thereby tension force that deformation produces can be acted on positive/negative plate effectively, with the distance between positive/negative plate, regulates.
3. electrokinetic cell as claimed in claim 1, it is characterized in that, described elastic plate comprises planar section and coupling part, the outside of described planar section and described battery core fits, described coupling part is connected to the two ends of described planar section, and one end of described coupling part is connected to described planar section, the other end of described coupling part contacts with described housing;
Wherein, the employing of described coupling part can produce elastically-deformable material and make, so that the thickness of described elastic plate can change with the distance in gap between the deformation of described battery core or described battery core and described housing, thereby regulate positive plate in described battery core and the distance between negative plate.
4. electrokinetic cell as claimed in claim 3, is characterized in that,
Described coupling part is flat shape; Or,
Described coupling part is curve form, and described planar section and described coupling part are tangent connection.
5. electrokinetic cell as claimed in claim 1, is characterized in that, described elastic plate comprises the first planar section, the second planar section and coupling part, wherein,
The outside of described the first planar section and described battery core fits, and the inner side of described the second planar section and described housing fits;
Described coupling part is connected between described the first planar section and the second planar section, or one section is connected to described the first planar section and the other end contacts with the inner side of described housing;
Wherein, the employing of described coupling part can produce elastically-deformable material and make, so that the thickness of described elastic plate can change with the distance in gap between the deformation of described battery core or described battery core and described housing, thereby adjust positive plate in described battery core and the distance between negative plate.
6. electrokinetic cell as claimed in claim 5, is characterized in that,
Described coupling part is flat shape; Or,
Described coupling part is curve form, and between described coupling part and described the first planar section for being tangently connected, be tangent connection between described coupling part and described the second planar section.
7. electrokinetic cell as claimed in claim 5, is characterized in that, described the first planar section, the second planar section and coupling part form a continuous periodic structure, and described elastic plate comprises a plurality of above-mentioned periodic structures.
8. the electrokinetic cell as described in claim 3 or 5, is characterized in that, described coupling part adopts metal material or plastic material to make.
9. electrokinetic cell as claimed in claim 8, is characterized in that, described metal material is stainless steel 304 or titanium alloy T R90.
10. electrokinetic cell as claimed in claim 8, is characterized in that, described plastic material is a kind of in perfluoroethylene-propylene (copolymer) PFA, ethene, TFE copolymer FEP or Kynoar FEP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310689084.XA CN103647105A (en) | 2013-12-12 | 2013-12-12 | Power battery |
Applications Claiming Priority (1)
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| CN106207016A (en) * | 2015-05-04 | 2016-12-07 | 宁德时代新能源科技股份有限公司 | Power battery |
| CN106450100A (en) * | 2016-12-21 | 2017-02-22 | 常熟高嘉能源科技有限公司 | Lithium battery aluminum case with high strength and large accommodating spaces |
| CN106952742A (en) * | 2017-03-14 | 2017-07-14 | 苏州海凌达电子科技有限公司 | A kind of preparation method of high-performance barium titanate based coextruded film super capacitor material |
| CN107452918A (en) * | 2017-08-16 | 2017-12-08 | 包头昊明稀土新电源科技有限公司 | Rare earth new power and preparation method thereof |
| CN107464900A (en) * | 2017-07-03 | 2017-12-12 | 江苏科耐尔新能源科技有限公司 | A kind of lead-acid battery battery case |
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| CN110679025A (en) * | 2017-12-06 | 2020-01-10 | 株式会社Lg化学 | Cylindrical secondary battery provided with piezoelectric element |
| CN111009693A (en) * | 2019-11-19 | 2020-04-14 | 江伟 | Internal fine adjustment cylindrical battery cell assembly process |
| CN111052437A (en) * | 2017-08-29 | 2020-04-21 | 卡尔·弗罗伊登伯格公司 | Energy storage system |
| CN111916604A (en) * | 2020-08-10 | 2020-11-10 | 东方醒狮储能电池有限公司 | Multifunctional shell for installing lithium power battery |
| CN112820995A (en) * | 2020-12-28 | 2021-05-18 | 中国科学院软件研究所 | Energy integration system for software-defined satellite |
| CN113394490A (en) * | 2021-05-28 | 2021-09-14 | 东莞塔菲尔新能源科技有限公司 | Secondary battery |
| CN114725595A (en) * | 2021-01-04 | 2022-07-08 | 佛吉亚排气系统有限公司 | Power storage battery |
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| CN104037448A (en) * | 2014-06-13 | 2014-09-10 | 广东亿纬赛恩斯新能源系统有限公司 | Battery |
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| CN106450100A (en) * | 2016-12-21 | 2017-02-22 | 常熟高嘉能源科技有限公司 | Lithium battery aluminum case with high strength and large accommodating spaces |
| CN106952742A (en) * | 2017-03-14 | 2017-07-14 | 苏州海凌达电子科技有限公司 | A kind of preparation method of high-performance barium titanate based coextruded film super capacitor material |
| CN110366794A (en) * | 2017-03-29 | 2019-10-22 | 松下知识产权经营株式会社 | Non-aqueous electrolyte secondary battery and battery module |
| CN110366794B (en) * | 2017-03-29 | 2022-03-04 | 松下知识产权经营株式会社 | Nonaqueous electrolyte secondary battery and battery module |
| CN107464900A (en) * | 2017-07-03 | 2017-12-12 | 江苏科耐尔新能源科技有限公司 | A kind of lead-acid battery battery case |
| CN107464900B (en) * | 2017-07-03 | 2021-01-12 | 江苏科耐尔新能源科技有限公司 | Lead-acid battery jar |
| CN107452918B (en) * | 2017-08-16 | 2020-09-18 | 包头昊明稀土新电源科技有限公司 | Rare earth new power supply and preparation method thereof |
| CN107452918A (en) * | 2017-08-16 | 2017-12-08 | 包头昊明稀土新电源科技有限公司 | Rare earth new power and preparation method thereof |
| CN111052437A (en) * | 2017-08-29 | 2020-04-21 | 卡尔·弗罗伊登伯格公司 | Energy storage system |
| CN110679025A (en) * | 2017-12-06 | 2020-01-10 | 株式会社Lg化学 | Cylindrical secondary battery provided with piezoelectric element |
| CN110679025B (en) * | 2017-12-06 | 2023-03-10 | 株式会社Lg新能源 | Cylindrical secondary battery provided with piezoelectric element |
| US11362377B2 (en) | 2017-12-06 | 2022-06-14 | Lg Energy Solution, Ltd. | Cylindrical secondary battery having piezoelectric element disposed therein |
| CN111009693B (en) * | 2019-11-19 | 2021-09-17 | 南京中比新能源科技有限公司 | Internal fine adjustment cylindrical battery cell assembly process |
| CN111009693A (en) * | 2019-11-19 | 2020-04-14 | 江伟 | Internal fine adjustment cylindrical battery cell assembly process |
| CN111916604B (en) * | 2020-08-10 | 2022-06-14 | 东方醒狮储能电池有限公司 | Multifunctional shell for installing lithium power battery |
| CN111916604A (en) * | 2020-08-10 | 2020-11-10 | 东方醒狮储能电池有限公司 | Multifunctional shell for installing lithium power battery |
| CN112820995A (en) * | 2020-12-28 | 2021-05-18 | 中国科学院软件研究所 | Energy integration system for software-defined satellite |
| CN112820995B (en) * | 2020-12-28 | 2022-06-07 | 中国科学院软件研究所 | Energy integration system for software-defined satellite |
| CN114725595A (en) * | 2021-01-04 | 2022-07-08 | 佛吉亚排气系统有限公司 | Power storage battery |
| CN113394490A (en) * | 2021-05-28 | 2021-09-14 | 东莞塔菲尔新能源科技有限公司 | Secondary battery |
| CN113394490B (en) * | 2021-05-28 | 2022-10-11 | 江苏正力新能电池技术有限公司 | Secondary battery |
| WO2023283807A1 (en) * | 2021-07-13 | 2023-01-19 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and power-consuming device |
| US11855297B2 (en) | 2021-07-13 | 2023-12-26 | Contemporary Amperex Technology Co., Limited | Battery unit, battery, and electric apparatus |
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