CN115483360A - Bipolar pole piece and sodium ion bipolar battery - Google Patents
Bipolar pole piece and sodium ion bipolar battery Download PDFInfo
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- CN115483360A CN115483360A CN202211151990.XA CN202211151990A CN115483360A CN 115483360 A CN115483360 A CN 115483360A CN 202211151990 A CN202211151990 A CN 202211151990A CN 115483360 A CN115483360 A CN 115483360A
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/029—Bipolar electrodes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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
Abstract
The invention belongs to the technical field of solid batteries, and comprises a bipolar pole piece, wherein the bipolar pole piece comprises a current collector, the edges of the front side and the back side of the current collector are coated with sealing glue, a region surrounded by the sealing glue on the front side is coated with positive active substances, and a region surrounded by the sealing glue on the back side is coated with negative active substances. The battery also comprises a sodium ion bipolar battery, wherein the bipolar battery comprises a positive plate, a negative plate and a plurality of bipolar plates; the positive plate, the negative plate and each bipolar plate meet the condition that the positive active material is just opposite to the negative active material, and a diaphragm is arranged between the positive active material and the negative active material. Because electrons directly pass through the other surface from one surface of the current collector, and the current path has a small distance and a large area, the ohmic resistance is far smaller than that of the traditional pole piece, and the anode ear and the cathode ear of each bipolar battery have the same width with the current collector, so that the high-rate charge and discharge requirements of the battery can be met.
Description
Technical Field
The invention belongs to the technical field of storage batteries, and particularly relates to a bipolar pole piece and a sodium ion bipolar battery.
Background
The traditional sodium ion battery and lithium ion battery internally comprise a group of positive plates and negative plates, and the group of positive plates and the group of negative plates realize batteries with different capacities through multilayer superposition or positive and negative winding. The batteries in the form of pole piece superposition or winding are connected with the external positive and negative electrodes of the batteries through the tabs and the tabs of the current confluence, and the external positive and negative electrodes of the batteries are connected through wires to realize the serial connection or the parallel connection of the battery monomers to realize the random combination of capacity and voltage.
The width of a pole lug of the laminated structure is far smaller than that of a pole piece, the current of the positive pole piece is concentrated at the pole lug, and the temperature of the position is increased due to the excessive current, and even the pole lug is fused. Because the width of the tab is at the upper limit of the design, the design of bearing current is satisfied in order to ensure enough tab sectional area, so that thinner positive and negative current collectors cannot be used, and a battery with higher-rate charge and discharge cannot be designed.
For a hybrid electric vehicle, mechanical energy can be converted into electric energy of a battery in the braking process of the vehicle, and because of the characteristics of a sodium ion battery and a lithium ion battery, the energy recovery has upper limit recovery efficiency. Ohmic resistance is far less than that of a traditional pole piece and a battery in a lamination or winding mode, so that high-rate charging can be realized, and energy recovery efficiency is improved.
Disclosure of Invention
One objective of the present invention is to provide a bipolar electrode plate capable of allowing electrons to directly flow from one side of a current collector to the other side, so as to achieve the minimum transmission distance of electrons and the maximum current transmission area of the electrode plate, thereby infinitely improving the current carrying capacity of the electrode plate.
In order to achieve the purpose, the invention provides the following technical scheme: a bipolar pole piece comprises a current collector, wherein glue coating areas are reserved at the edges of the front side and the back side of the current collector respectively, a sealant is coated on the glue coating areas, a positive active material is coated in an area surrounded by the sealant on the front side, and a negative active material is coated in an area surrounded by the sealant on the back side.
In the technical scheme, one surface of the current collector is provided with the positive electrode active material, the other surface of the current collector is provided with the negative electrode active material, compared with the existing pole piece with the positive electrode active material and the negative electrode active material distributed on the left part and the right part of the current collector, electrons of the bipolar pole piece directly flow from one surface of the current collector to the other surface, namely the thickness of the current collector is the transmission distance of the electrons, the thickness of the current collector is far smaller than the length or the width, so the distance from the positive electrode to the negative electrode of the electrons in the bipolar pole piece is very short, in addition, in the bipolar pole piece, the front surface area of the current collector is the electron transmission area, and the ohmic resistance is far smaller than that of the traditional pole piece.
Preferably, the thickness of the sealant on one side of the current collector is larger than that of the active material on the corresponding side. The bipolar pole pieces are used as units for forming the battery, the bipolar batteries with different voltages are obtained by superposing a certain number of bipolar pole pieces, and the superimposed layers of bipolar pole pieces can be partially melted by a sealant higher than the active substance, and adjacent pole pieces are bonded, fixed and sealed.
Preferably, the bipolar pole piece is of a sheet structure and has the performance of folding and winding into a roll. The bipolar battery has a thin sheet structure with small thickness and large surface area, and the internal temperature is more uniform, so that the heat dissipation and heating of the battery are facilitated.
As a preferred scheme, the current collectors of the bipolar pole pieces are all made of aluminum, and the bipolar pole pieces can be used for manufacturing sodium-ion batteries.
Another objective of the present invention is to provide a sodium-ion bipolar battery, which achieves the purpose that electrons have the smallest transmission distance and the pole piece has the largest current transmission area, so as to infinitely improve the current carrying capacity of the pole piece.
In order to achieve the purpose, the invention provides the following technical scheme: a sodium ion bipolar battery comprises a positive plate, a negative plate and a plurality of bipolar plates according to the claims, wherein the bipolar plates are stacked between the positive plate and the negative plate along the thickness direction, and current collectors in the bipolar plates, the positive plate and the negative plate of the sodium ion bipolar battery are all made of aluminum. Specifically, the positive plate has no negative active material on the back side and no sealant around the negative active material compared with the bipolar plate, one side of the current collector extends to form a reserved positive electrode lug part, the negative plate has no positive active material on the back side and no sealant around the positive active material compared with the bipolar plate, and one side of the current collector extends to form a reserved negative electrode lug part; the positive plate, the negative plate and each bipolar plate meet the condition that the positive active material is opposite to the negative active material, a diaphragm is arranged between the positive active material and the negative active material, and electrolyte is adsorbed in the diaphragm.
In the technical scheme, the stacked bipolar pole pieces are connected in series in a mode of being connected by the ear-free connecting parts, so that the cost and the occupied space of the connecting parts are saved, the bipolar batteries with different voltages can be obtained by setting the number of stacked layers of the bipolar pole pieces, and the batteries with different capacities can be obtained by setting the weight of active substances in a single pole piece. In the bipolar battery, because electrons directly pass through one surface of the current collector and the current path has a small distance and a large area, the ohmic resistance is far smaller than that of the traditional pole piece, and the anode lug and the cathode lug of each bipolar battery have the same width with the current collector, the high-rate charge-discharge requirement of the battery can be met, and the purpose of improving the energy recovery efficiency can be realized in mobile equipment such as oil-electricity hybrid power equipment.
Preferably, the sodium-ion bipolar battery further comprises an insulating layer which integrally wraps and seals the positive plate, the negative plate and the bipolar plate, and the positive pole lug part and the negative pole lug part penetrate through the insulating layer and are exposed outside.
Preferably, adjacent sealing glue among the positive plate, the negative plate and the bipolar plate is bonded together to realize fixation and sealing of the battery and ensure that the battery has stable charge and discharge performance.
Preferably, the positive pole ear and the negative pole ear have the same cross-sectional shape with the side face of the current collector, so that the positive pole ear and the negative pole ear have the largest size, the current carrying capacity is improved, and the requirement of high-rate charge-discharge performance on the pole lug is met.
Preferably, the current collectors in the positive plate and the negative plate are both made of aluminum, and the positive active substance is one of a layered oxide material, a polyanion compound material, prussian and the like material and an organic compound material; the negative active substance is one of a carbon material, an alloy type negative material, an oxide type negative material and a sulfide type negative material; the electrolyte is a chain or cyclic ester compound containing sodium hexafluorophosphate, sodium perchlorate, naTFSI, naFTFSI and NaFSI.
In summary, the sodium ion bipolar battery provided by the invention has the following beneficial effects:
1. the voltage of the combined bipolar battery depends on the number of layers of the bipolar pole pieces, and the battery without the connecting parts connected in series can provide different battery voltages;
2. the cutting opening of the bipolar battery pole piece is not positioned in the battery, so that the pole piece has no edge burrs;
3. the cost and the occupied space of the connecting part are saved, and the multiplying power charge and discharge performance of the battery can be greatly improved;
4. the bipolar battery has large area, small thickness and more uniform internal temperature, and is more beneficial to heat dissipation and heating of the battery;
5. the bipolar sodium ion battery pack made of the bipolar sodium ion battery pack has no external serial connection, or the serial connection of batteries is greatly reduced, connecting components are saved, and the energy density is improved;
6. when the series battery pack is charged and discharged, the basic unit cells have the same current and different voltages, when one basic unit cell falls behind, the voltage fluctuation of other basic unit cells is caused, and the current does not change, so that the damage of the falling basic unit cell is easily accelerated, and even thermal runaway is caused. The capacity is increased in a parallel connection mode, if one battery unit is abnormal or damaged, charging and discharging can be shielded, the voltage is not changed, the capacity is reduced, and the battery pack can still be used normally. The defect that the whole battery pack cannot be used after one basic unit is damaged in a combined mode of series connection of traditional lead-acid batteries or lithium ion batteries is overcome.
7. The size characteristics of the polar sodium ion battery pack determine that the heat dissipation performance is very good, the internal resistance of the electrodeless lug connection is very small, and the polar sodium ion battery pack is very suitable for electric bicycles or electric motorcycles under the working conditions of high-rate charge and discharge.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic cross-sectional view of an embodiment of a bipolar electrode plate of the present invention;
FIG. 2 is a schematic view of a partially cut-away structure of a bipolar electrode plate provided by the present invention;
FIG. 3 is a schematic view of a cross-sectional structure of a positive electrode plate in the bipolar electrode plate provided by the present invention;
FIG. 4 is a schematic view of a cross-sectional structure of a negative electrode plate in the bipolar electrode plate provided by the present invention;
FIG. 5 is a schematic sectional structure view of a sodium ion bipolar battery manufactured by using the bipolar electrode plates shown in FIGS. 1 to 4 according to the present invention.
In the figure, a current collector 1, a negative electrode active material 2, a positive electrode active material 3, a sealant 4, a bipolar electrode sheet 5, a positive electrode sheet 6, a negative electrode sheet 7, a separator 8, an insulating layer 9, a positive electrode lug 11, and a negative electrode lug 12.
Detailed Description
The embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present application can be fully understood and implemented.
Fig. 1 and fig. 2 show an embodiment of a bipolar electrode sheet according to the present invention, the bipolar electrode sheet has a sheet structure, and has a folding and winding performance, and includes a current collector 1, and according to a type of a battery to be manufactured, the current collector 1 may be made of a single material, such as a metal material, e.g., aluminum, nickel, platinum, or a double-layer material, such as a copper-aluminum double-layer material with an aluminum front surface and a copper back surface. Glue coating areas are reserved at the edges of the front surface and the back surface of the current collector 1 respectively, a sealant 4 is coated on the glue coating areas, a positive active material 3 is coated in an area surrounded by the sealant 4 on the front surface, a negative active material 2 is coated in an area surrounded by the sealant 4 on the back surface, and the thickness of the sealant on one side of the current collector 1 is larger than that of the active material on the corresponding side. Compared with the existing pole pieces with positive and negative active materials distributed on the left and right parts of the same side of the current collector, the bipolar pole piece has the condition that electrons directly flow from one side of the current collector to the other side, namely the thickness of the current collector is the transmission distance of the electrons, and the distance from the positive electrode to the negative electrode in the bipolar pole piece is very short because the thickness of the current collector is far smaller than the length or the width, in addition, in the bipolar pole piece, the area of the front side of the current collector 1 is the electron transmission area, so the ohmic resistance is far smaller than that of the traditional pole piece.
Based on the bipolar pole pieces, the invention also provides a sodium ion bipolar battery, wherein each bipolar battery comprises a positive pole piece 6 shown in fig. 3, a negative pole piece 7 shown in fig. 4 and a plurality of bipolar pole pieces 5 shown in fig. 1, and the outermost layer of each bipolar battery is wrapped by an insulating layer 9 to realize the sealing of the battery. The current collectors in the bipolar pole piece 5, the positive pole piece 6 and the negative pole piece 7 of the sodium ion bipolar battery are all made of aluminum. Specifically, the positive electrode sheet 6 has no negative electrode active material 2 on the back side and no sealant 4 around the negative electrode active material 2 compared to the bipolar electrode sheet 5, the negative electrode sheet has no positive electrode active material 3 on the back side and no sealant 4 around the positive electrode active material 3 compared to the bipolar electrode sheet 5, and one side of the current collector of the positive electrode sheet 6 and the negative electrode sheet 7 extends in the full length dimension and forms a positive electrode tab 11 and a negative electrode tab 12, respectively. The positive electrode active material 3 is one of a layered oxide material, a polyanion compound material, prussian and its analogue material, and an organic compound material; the negative electrode active material 2 is one of a carbon material, an alloy type negative electrode material, an oxide type negative electrode material, and a sulfide type negative electrode material; the electrolyte is a chain or cyclic ester compound containing sodium hexafluorophosphate, sodium perchlorate, naTFSI, naFTFSI and NaFSI.
Fig. 5 is a schematic view showing a sodium ion bipolar battery according to the present embodiment in a flat state, in which 11 bipolar substrates 5 shown in fig. 1 are used, the bipolar substrates 5 are stacked in order with the negative electrode facing upward and the positive electrode facing downward, the positive electrode active material of the positive electrode sheet 6 faces the negative electrode active material of the uppermost bipolar substrate 5, the negative electrode active material of the negative electrode sheet 7 faces the positive electrode active material of the lowermost bipolar substrate 5, and a separator 8 is provided between the adjacent positive electrode active material and negative electrode active material. In addition, after adjacent pole pieces in the bipolar battery are stacked, the sealant area is heated and pressurized, all the pole pieces are bonded together after the sealant is melted, and the sealant and the diaphragm play a role in sealing and insulating. And (3) not heating and pressurizing any width of any side of the bipolar battery, forming a liquid injection port, ensuring that the anode lug part 11 and the cathode lug part 12 extend out of the insulating layer 9 and the sealing performance of the peripheries of the tabs, then performing a liquid injection process into the insulating layer 9 through the liquid injection port, pressurizing the whole battery after formation is finished, heating and pressurizing the liquid injection port, and sealing to obtain the qualified bipolar battery.
In the embodiment, the sizes of the current collectors of the positive and negative electrode plates are 0.05mm 220mm 300mm, and the leading-out lengths of the positive electrode lug part 11 and the negative electrode lug part 12 are 20mm; the size of a current collector in the bipolar pole piece is 0.01mm 200mm 300mm, the coating area of the middle active substance is 180mm 280mm, and the width of the sealant at the periphery is 10mm; the size of the used separator is 0.02mm 202mm 302mm, the periphery of the separator exceeds the current collector of the bipolar battery by 1mm, the material is a PET (polyethylene terephthalate) stretched porous membrane or a fiber membrane, and the porous separator prepared from materials with the melting point higher than 160 ℃ such as PI (polyimide), aramid fiber and the like can also be used.
In the bipolar pole piece, the N/P ratio of the positive and negative active substances is 1.0-2.0, and the positive active substance coating surface density is 200g/m 2 The density of the coated surface of the negative electrode active material is 100g/m 2 . The thickness of the finally obtained bipolar pole piece is 0.18mm-0.20mm; the thickness of the positive pole piece is 0.10mm-0.12mm; the thickness of the negative pole piece is 0.16mm-0.18mm. The bipolar sodium-ion battery pole piece, the sodium-ion positive pole piece and the sodium-ion negative pole piece can be obtained according to the method, and the bipolar sodium-ion battery pole piece, the sodium-ion positive pole piece and the sodium-ion negative pole piece are stacked according to the stacking method of the bipolar battery to form the sodium-ion battery with integral multiple of basic unit voltage such as 12V,24V,48V,60V, 72V. For a 48V bipolar battery, the thickness is 3.6mm, the length and width dimensions are 200mm × 300mm, the capacity of the bipolar battery pack is 1.2Ah, and the capacity of the battery pack can be increased by increasing the area of the bipolar pole pieces.
In the embodiment, the stacked bipolar pole pieces are connected in series in a mode of being connected by the ear-free connecting parts, so that the cost and the occupied space of the connecting parts are saved, the bipolar batteries with different voltage sizes can be obtained by setting the number of stacked layers of the bipolar pole pieces, and the batteries with different capacity sizes can be obtained by setting the weight of active substances in a single pole piece. In the bipolar battery, because electrons directly pass through one surface of the current collector and the current path has a small distance and a large area, the ohmic resistance is far smaller than that of the traditional pole piece, and the anode ear 11 and the cathode ear 12 of each bipolar battery have the same width with the current collector, so that the purposes that the electrons have the minimum transmission distance and the pole pieces have the maximum current transmission area are realized, the current bearing capacity of the pole pieces is infinitely improved, the high-rate charge and discharge requirements of the battery can be met, and the purpose of improving the energy recovery efficiency can be realized in a mobile device such as oil-electricity hybrid motion.
In addition, the sodium ion bipolar battery can be applied to the electric bicycle, the battery occupies small space and can be wound, so that the position of the battery bin can be designed to the bottom of the pedal plate and the seat barrel connected with the pedal plate, the length and width of the battery bin can be improved to the maximum extent by the design of the battery bin, the height of the pedal plate can be reduced to the maximum extent, the storage space in the seat barrel is hardly occupied, the gravity center of the electric bicycle is reduced to the maximum extent, and the seat is completely designed to be above the rear wheel. Therefore, the battery is used, so that the design of the electric bicycle is not limited by the battery compartment, the control safety of the electric bicycle is greatly improved, and the driving comfort is greatly improved.
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. The description and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, that a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrases "comprising one of \8230;" does not exclude the presence of additional like elements in an article or system comprising the element.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A bipolar pole piece, comprising: the current collector comprises a current collector body, wherein a circle of gluing area is reserved at the edge of the front side and the edge of the back side of the current collector body respectively, a sealant is coated on the gluing area, a positive active material is coated in an area surrounded by the sealant on the front side, and a negative active material is coated in an area surrounded by the sealant on the back side.
2. A bipolar pole piece as claimed in claim 1, wherein: the thickness of the sealant on one side of the current collector is larger than that of the active material on the corresponding side.
3. A bipolar pole piece as claimed in claim 2, wherein: the bipolar pole piece is of a sheet structure and has deformation performance of folding and winding into a roll.
4. A bipolar pole piece according to any one of claims 1 to 3, wherein: and the current collector of the bipolar pole piece is made of aluminum.
5. A sodium ion bipolar battery, characterized in that: the bipolar pole pieces comprise a positive pole piece, a negative pole piece and a plurality of bipolar pole pieces according to claim 4, wherein the bipolar pole pieces are stacked between the positive pole piece and the negative pole piece along the thickness direction; compared with the bipolar pole piece, the positive pole piece does not have the negative active material on the back side and the sealant on the periphery of the negative active material, one side of the current collector extends to form a reserved positive pole lug part, compared with the bipolar pole piece, the negative pole piece does not have the positive active material on the back side and the sealant on the periphery of the positive active material, and one side of the current collector extends to form a reserved negative pole lug part; the positive plate, the negative plate and each bipolar plate meet the condition that the positive active material is just opposite to the negative active material, and a diaphragm for adsorbing electrolyte is arranged between the positive active material and the negative active material.
6. The bipolar battery according to claim 5, wherein: the bipolar battery also comprises an insulating layer which integrally wraps and seals the positive plate, the negative plate and the bipolar plate, and the positive pole lug part and the negative pole lug part penetrate through the insulating layer and are exposed outside.
7. The bipolar battery according to claim 6, wherein: and adjacent sealing glue among the positive plate, the negative plate and the bipolar plate is adhered together.
8. The bipolar battery according to claim 6, wherein: the positive electrode lug and the negative electrode lug have the same cross-sectional shape as the side surface of the current collector.
9. The bipolar battery according to any one of claims 5-8, wherein: the current collectors in the positive plate and the negative plate are both made of aluminum materials, and the positive active substance is one of a layered oxide material, a polyanion compound material, a Prussian and analogue material thereof and an organic compound material; the negative electrode active material is one of a carbon material, an alloy type negative electrode material, an oxide type negative electrode material and a sulfide type negative electrode material; the electrolyte is a chain or cyclic ester compound containing sodium hexafluorophosphate, sodium perchlorate, naTFSI, naFTFSI and NaFSI.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211151990.XA CN115483360A (en) | 2022-09-21 | 2022-09-21 | Bipolar pole piece and sodium ion bipolar battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211151990.XA CN115483360A (en) | 2022-09-21 | 2022-09-21 | Bipolar pole piece and sodium ion bipolar battery |
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| CN115483360A true CN115483360A (en) | 2022-12-16 |
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| CN202211151990.XA Pending CN115483360A (en) | 2022-09-21 | 2022-09-21 | Bipolar pole piece and sodium ion bipolar battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116853072A (en) * | 2023-06-15 | 2023-10-10 | 浙江华宇钠电新能源科技有限公司 | Voltage follow-up control method and control system for sodium ion battery |
| CN117613193A (en) * | 2024-01-24 | 2024-02-27 | 北京希倍动力科技有限公司 | Non-negative sodium ion bipolar solid-state battery and preparation method thereof |
-
2022
- 2022-09-21 CN CN202211151990.XA patent/CN115483360A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116853072A (en) * | 2023-06-15 | 2023-10-10 | 浙江华宇钠电新能源科技有限公司 | Voltage follow-up control method and control system for sodium ion battery |
| CN116853072B (en) * | 2023-06-15 | 2023-12-15 | 浙江华宇钠电新能源科技有限公司 | Voltage follow-up control method and control system for sodium ion battery |
| CN117613193A (en) * | 2024-01-24 | 2024-02-27 | 北京希倍动力科技有限公司 | Non-negative sodium ion bipolar solid-state battery and preparation method thereof |
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