CN110994079B - Lithium battery heat dissipation device for new energy automobile battery - Google Patents
Lithium battery heat dissipation device for new energy automobile battery Download PDFInfo
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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
- H01M16/00—Structural combinations of different types of electrochemical generators
- H01M16/003—Structural combinations of different types of electrochemical generators of fuel cells with other electrochemical devices, e.g. capacitors, electrolysers
- H01M16/006—Structural combinations of different types of electrochemical generators of fuel cells with other electrochemical devices, e.g. capacitors, electrolysers of fuel cells with rechargeable batteries
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
- H01M10/6555—Rods or plates arranged between the cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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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
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type 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
- 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
- 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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention discloses a lithium battery heat dissipation device for a new energy automobile battery, which comprises a flow battery monomer, a lithium battery and a connecting piece, wherein the flow battery monomer can be used as a heat dissipation liquid cooling plate after being modified; the flow battery single bodies are arranged between the lithium batteries in a clamping mode; the two lithium batteries and the clamped single flow battery form a minimum heat dissipation unit of the lithium battery heat dissipation device together; the flow battery monomer comprises a battery diaphragm in the middle, positive/negative flow field plates at the two extreme sides, a positive/negative electrode and a positive/negative electrode frame. The lithium battery heat dissipation device for the new energy automobile battery provided by the invention adopts a flow battery monomer structure with large flow field area, small overall thickness and simple structure to be applied to the lithium battery heat dissipation device, so that the heat dissipation device has an electricity storage function, the size and the thickness of the device can be greatly reduced, and the heat dissipation effect is improved.
Description
Technical Field
The invention belongs to the technical field of heat dissipation devices, and particularly relates to a lithium battery heat dissipation device for a new energy automobile battery.
Background
In the lithium ion power battery heat management technology of the new energy automobile, because air-cooled heat dissipation often cannot meet the expected heat dissipation effect, a liquid-cooled battery heat dissipation system for performing heat management on a power battery by using liquid as a medium is developed, the heat dissipation mode of the battery is that the liquid medium flows through the battery and takes away the heat of the battery, the heat is conveyed to a heat exchanger through a pump for cooling, and cooled fluid (cooling liquid) flows through the battery again.
Because the square lithium ion battery has regular shape and smooth surface, the battery can be cooled in a way that heat dissipation liquid cold plates are arranged between adjacent single batteries or on the side surface and the bottom surface of the battery pack. The liquid cooling plate is generally made of metal materials with high heat conductivity such as aluminum and copper, and has multiple structural forms, and the forming method of the liquid cooling plate which is applied at present is to embed a liquid cooling pipe into the metal plate, or directly weld flow passages of various shapes inside the plate. For the active liquid cooling battery heat dissipation system, in order to achieve a good heat dissipation effect, a higher flow rate of the cooling liquid and a lower temperature of a cooling liquid inlet are required, which inevitably increases the energy consumption of the pump and the refrigeration system. For electric vehicles, especially pure electric vehicles, the capacity of the battery system is limited and precious, so that the energy of the battery system is greatly consumed when the liquid cooling heat dissipation system operates; in addition, the heat dissipation system is used as a part of the battery system, and the liquid cooling plate is arranged between the single batteries, so that the volume and the weight of the whole battery system are increased, and further the overall energy density of the battery system is reduced.
Disclosure of Invention
The invention aims to overcome the problems in the background art, and provides a lithium battery heat dissipation device for a new energy automobile battery, which can remarkably improve the heat dissipation effect of the lithium battery, reduce the volume of the heat dissipation device, enable a cooling medium to have an electricity storage function, and increase the system electricity storage quantity.
In order to achieve the above object, the present invention is realized by:
a lithium battery heat dissipation device for a new energy automobile battery comprises a flow battery monomer which can be used as a heat dissipation liquid cooling plate after being modified, a lithium battery subjected to liquid cooling heat dissipation, and a connecting piece for connecting all parts of the flow battery monomer together; the flow battery single bodies are arranged between the lithium batteries in a clamping mode; the two lithium batteries and the clamped single flow battery form a minimum heat dissipation unit of the lithium battery heat dissipation device together;
the flow battery monomer comprises a battery diaphragm in the middle, positive/negative flow field plates at the two extreme sides, positive/negative electrodes and positive/negative electrode frames; the positive/negative electrode and the positive/negative electrode frame are arranged between the battery diaphragm and the positive/negative flow field plates, the positive/negative electrode is arranged on the positive/negative electrode frame, and the single flow battery clamps the positive/negative electrode frame provided with the positive/negative electrode through all the forming units according to the arrangement mode that the battery diaphragm is arranged in the middle and the positive/negative flow field plates are arranged at two sides to form an integrated structure and is fixedly connected together.
Further, still include liquid storage pot and transfer pump, the liquid storage pot is used for storing and carries to the free electrolyte solution of redox flow battery when carrying out the liquid cooling radiating action, the inlet of liquid storage pot passes through the pipeline and links to each other with the free electrolyte export of redox flow battery, the feed liquor end of transfer pump inserts in the liquid storage pot, the play liquid end of transfer pump passes through the pipeline and links to each other with the free electrolyte import of redox flow battery.
Further, the flow battery cell comprises one or more; the number of the lithium batteries is at least two.
Further, the positive electrode of the positive/negative electrode is a carbon felt, carbon cloth or carbon paper electrode with a three-dimensional porous structure, and the negative electrode of the positive/negative electrode is made of carbon felt, carbon paper, carbon cloth, copper foam, nickel foam, titanium foam or stainless steel foam; the battery diaphragm is an anion exchange membrane, a cation exchange membrane or a porous diaphragm.
Furthermore, the flow battery monomer clamps the positive/negative electrode frames provided with the positive/negative electrodes through all the components according to an arrangement mode that the middle part is provided with a battery diaphragm and two sides are opposite to form a positive/negative flow field plate to form an integrated structure and is fixedly connected together through a connecting piece; connecting holes are formed in the positive/negative electrode flow field plate and the positive/negative electrode frame, the connecting pieces are bolts, the connecting holes are screw holes matched with the connecting pieces, and the connecting holes are formed in the peripheral edges of the positive/negative electrode flow field plate and the positive/negative electrode frame.
Furthermore, the flow battery monomer clamps the positive/negative electrode frames provided with the positive/negative electrodes through all the components according to an arrangement mode that the middle part is provided with a battery diaphragm and two sides are opposite to form a positive/negative flow field plate to form an integrated structure, and the integrated structure is fixedly connected together through a glue sealing mode.
Furthermore, the inner side surface of the positive/negative electrode flow field plate is provided with a flow channel, the flow channel is a snake-shaped flow field or an interdigital flow field or a graded interdigital flow field, the cross section size of the flow channel meets the requirements that the depth is 0.2-5mm, the width is 0.2-20mm, and the rib width between the two flow channels is 0.2-20 mm; electrolyte solution inlets/outlets are formed in the upper end and the lower end of one side of the positive/negative electrode flow field plate and used for being connected with positive and negative electrode pipelines for conveying electrolyte solutions.
Furthermore, the flow channel is a serpentine flow field, the thickness of the single flow battery is 2-6mm, the thickness of the positive/negative flow field plate is 0.5-3mm, the positive/negative flow field plate is made of copper, an anti-corrosion coating of gold, titanium carbide, titanium nitride or chromium carbide is attached to the surface of the positive/negative flow field plate, and the flow field part of the positive/negative flow field plate is communicated with the positive/negative electrode through an electrolyte solution.
Furthermore, an electrolyte solution is communicated in the flow channel of the anode flow field plate and the cathode flow field plate of the single flow battery, and the electrolyte solution is ZnI2An aqueous solution, and optionally a KCl or NaCl supporting electrolyte.
Furthermore, the positive/negative electrode frame adopts a fluorine film, a silicon film or a rubber film.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a lithium battery heat dissipation device for a new energy automobile battery, which adopts a flow battery monomer structure with large flow field area, small overall thickness and simple structure to be applied to the lithium battery heat dissipation device, can greatly reduce the volume and thickness of the device, improve the heat dissipation effect and increase the overall electric storage capacity of the system. The lithium battery heat dissipation device for the new energy automobile battery is a lithium battery heat dissipation device with an electricity storage function, namely a flow battery monomer is used as a lithium battery heat dissipation liquid cold plate, an electrolyte solution in the flow battery is used as a cooling liquid to dissipate heat of the lithium battery, and meanwhile, the flow battery is used as a secondary battery with an electricity storage function, and the flow battery has battery capacity capable of providing energy for the operation of a liquid cooling heat dissipation system and the whole electric automobile battery system, so that the overall energy density of the battery system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a lithium battery heat dissipation device for a new energy vehicle battery according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a flow battery cell 1 in an embodiment of the invention;
fig. 3 is a schematic structural view of the positive/negative flow field plate 4 in the embodiment of the present invention.
The flow cell comprises a flow cell monomer 1, a flow cell monomer 2, a lithium cell 3, a connecting piece 4, a positive/negative flow field plate 5, a positive/negative electrode 6, a positive/negative electrode frame 7, a cell diaphragm 8, a connecting hole 9, a flow channel 10 and an electrolyte solution inlet/outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
Fig. 1 shows a structure of a lithium battery heat dissipation device for a new energy vehicle battery according to an embodiment of the invention. As shown in fig. 1 to fig. 3, a lithium battery heat dissipation device for a new energy vehicle battery according to an embodiment of the present invention includes a flow battery cell 1 that can be used as a heat dissipation liquid cold plate after being modified, a lithium battery 2 that is subjected to liquid cooling heat dissipation, and a connecting member 3 for connecting all parts of the flow battery cell together; the flow battery monomer 1 is arranged between two lithium batteries 2 in a clamping manner; the two lithium batteries 2 and the clamped flow battery monomer 1 jointly form a minimum heat dissipation unit of the lithium battery heat dissipation device; the flow battery monomer 1 in the embodiment of the invention is a novel flow battery monomer battery structure obtained by transforming a traditional flow battery, and the transformed flow battery has the characteristics that high-heat-conductivity metals such as copper and aluminum are used as a current collecting plate, and the corrosion-resistant coating is used for solving the problem that the metal is corroded by electrolyte.
The flow battery monomer 1 comprises a battery diaphragm 7 in the middle, positive/negative flow field plates 4 at the two extreme sides, a positive/negative electrode 5 and a positive/negative electrode frame 6; the positive/negative electrode 5 and the positive/negative electrode frame 6 are both arranged between the battery diaphragm 7 and the positive/negative flow field plate 4, the positive/negative electrode 5 is arranged on the positive/negative electrode frame 6, and the flow battery monomer 1 clamps the positive/negative electrode frame 6 with the positive/negative electrode 5 arranged therein through all the components according to the arrangement mode that the battery diaphragm 7 is arranged in the middle and the positive/negative flow field plates 4 are arranged in pairs at two sides to form an integrated structure and are connected together through the connecting piece 3.
In the embodiment of the invention, the flow battery cell 1 comprises one or more cells; the number of lithium batteries 2 is at least two.
Wherein, the positive/negative electrode 5 is a carbon felt electrode with a three-dimensional porous structure.
The positive/negative electrode flow field plate 4 and the positive/negative electrode frame 6 are provided with connecting holes 8. The connecting piece 3 is a bolt, the connecting hole 8 is a screw hole matched with the connecting piece 3, and the connecting hole 8 is arranged at the peripheral edges of the anode/cathode flow field plate 4 and the anode/cathode electrode frame 6.
A flow channel 9 is arranged on the inner side surface of the positive/negative electrode flow field plate 4, the flow channel 9 is a snake-shaped flow channel, the cross section of the flow channel 9 is 3 multiplied by 1mm, namely the width of the flow channel 9 is 3mm, the depth of the flow channel is 1mm, and the width of a rib between the two flow channels is 4 mm; in practical application, a pagoda mouth interface can be connected with the electrolyte solution inlet/outlet 10 by bolts, and then the anode and cathode pipelines are connected with liquid inlet and outlet ports on the anode and cathode of the flow battery monomer 1.
The thickness of the flow battery monomer 1 is 6mm, wherein the thickness of the anode/cathode flow field plate 4 is 2mm, the overall size of the anode/cathode flow field plate 4 is 170 x 115mm, the anode/cathode flow field plate 4 is made of copper, a titanium carbide anti-corrosion coating is attached to the surface of the flow field plate, the area of the flow field part of the anode/cathode flow field plate 4 is 142 x 80mm, and the flow field part of the anode/cathode flow field plate 4 is communicated with the anode/cathode electrode 5 through electrolyte solution.
The positive/negative electrode flow field plates 4 of the single flow battery 1 are communicated with an electrolyte solution in the flow channels 9, wherein in the embodiment of the invention, the electrolyte solution is ZnI2An aqueous solution. The lithium battery 2 is a lithium iron phosphate square battery with the specification of 148 multiplied by 92 multiplied by 28 mm.
The positive/negative electrode frame 6 adopts fluorine film with a certain compression amount, so that the fluorine film simultaneously plays the roles of placing electrodes, insulating and sealing.
In the embodiment of the present invention, the flow battery cell 1 is a flow battery with high energy density: the zinc-iodine (Zn-I) flow battery is formed by modifying the zinc-iodine (Zn-I) flow battery, and the total reaction formula of the zinc-iodine (Zn-I) flow battery is as follows:
during charging, zinc ions in the negative electrode obtain electrons and deposit metal zinc on the electrode, and iodine ions in the positive electrode lose electrons to form polyiodide ions.
Obviously, the area of a single flow field of a traditional flow battery is small compared with that of the whole single battery, the thickness of the single battery is large, and the traditional flow battery is provided with a current collecting plate, an end plate and the like, so that the traditional flow battery is not suitable for being used as a liquid cooling plate for heat dissipation of a lithium ion battery. Therefore, it must be improved to be applied to a heat sink of a lithium battery. The invention improves the traditional flow battery, is applied to a lithium battery heat dissipation device, designs a flow battery monomer structure with large flow field area, small overall thickness and simple structure, and is suitable to be used as a micro-channel heat dissipation liquid cooling plate. Fig. 2 is a schematic structural diagram of the flow battery cell 1. In the embodiment of the invention, the flow battery monomer 1 eliminates an end plate and a current collecting plate structure on the traditional flow battery structure, the positive/negative flow field plate 4 is made of copper with high heat conductivity, and an electrolyte flow channel is processed on the positive/negative flow field plate 4 and subjected to surface anticorrosion treatment, so that the positive/negative flow field plate can simultaneously take the functions of the current collecting plate and the polar plate. The structure of the single flow battery 1 is composed of a battery diaphragm 7, a positive/negative flow field plate 4, a positive/negative electrode 5 and a positive/negative electrode frame 6 as described above for the structure of the single flow battery 1, the positive/negative electrode 5 and the positive/negative electrode frame 6 are assembled by overlapping the positive/negative electrode 5 and the positive/negative electrode frame 6 in a bolt sealing manner through connecting holes reserved in the positive/negative flow field plate 4 to form a single flow battery, and the thickness of the single flow battery is only 6mm, so that the structure of the single flow battery 1 is greatly simplified and the single flow battery can be used on a lithium battery heat dissipation device. When the single flow battery works and operates as a lithium ion battery heat dissipation liquid cold plate, cooling liquid (electrolyte solution) is conveyed to flow fields inside the positive electrode and the negative electrode of the battery through a pump to take away heat generated by the battery; meanwhile, the electrolyte solution (coolant) undergoes an oxidation-reduction reaction on the electrodes in the positive and negative flow fields, generating electricity.
According to the lithium battery heat dissipation device for the new energy automobile battery, the flow battery single battery is improved, and the flow battery single battery is used as a micro-channel heat dissipation liquid cooling plate. The positive electrode and the negative electrode separated by the battery diaphragm are both provided with a serpentine flow field structure, the material of the flow field plate is copper with high heat conductivity coefficient, and the thickness of the flow field plate is only 2mm, so that heat generated during charging and discharging of the lithium battery can be rapidly transferred to the liquid cooling plate and is taken away by the cooling liquid continuously flowing in the liquid cooling plate; meanwhile, as the carbon felt electrode with the three-dimensional porous structure is arranged in the electrode frame on the snake-shaped flow field in the flow cell, the electrolyte infiltrates the whole electrode area, and the carbon felt electrode with the porous structure plays a role in enhancing heat transfer; the serpentine flow field is communicated with the electrodes by electrolyte, so that the device has a good temperature equalizing effect. The single liquid flow battery serving as the micro-channel liquid cooling plate has an excellent heat dissipation effect, and experiments prove that when the liquid cooling plate is clamped between two square lithium iron phosphate batteries with the sizes of 148 x 92 x 28mm, the ambient temperature is 25 ℃, the inlet temperature of cooling liquid is 25 ℃, the flow rate of the cooling liquid is 2ml/s, and the lithium battery 4℃ discharges, the liquid cooling plate can control the highest temperature of the lithium battery to be below 39.7 ℃, other conditions are unchanged, and when the lithium battery has no heat dissipation measures, the highest temperature of the lithium battery is 50.1 ℃, namely the liquid cooling plate can reduce the temperature of the lithium battery by 10.4 ℃ under the working condition.
When the single liquid flow battery operates as a liquid cooling plate, the single liquid flow battery can also be used as an energy storage battery to release electric quantity, and the zinc-iodine liquid flow battery provided by the invention is ZnI2Aqueous solution as positive and negative electrolyte solution, ZnI2The zinc-iodine flow battery has high solubility, the theoretical energy density of the flow battery can reach 322Wh/L at the highest solubility, and the zinc-iodine flow battery has high energy density, so that objective battery capacity can be added to the whole battery system after the zinc-iodine flow battery is used as a liquid cooling plate to be grouped with a lithium battery.
In practical application, an electric vehicle battery system is composed of tens of or even hundreds of square batteries, when the heat dissipation device in the invention is used as a heat management system to dissipate heat of lithium batteries, as shown in fig. 1 and 2, a single flow battery (i.e. an improved liquid cooling plate) is firstly assembled and clamped between two square lithium batteries, and heat conducting glue or heat conducting grease is coated on the surface of the liquid cooling plate, which is in contact with the lithium batteries, so that certain pre-tightening force is ensured, and adverse effects of contact thermal resistance are reduced. A liquid cooling plate is clamped by the two lithium batteries to form a minimum heat dissipation unit of the heat dissipation system, and then the minimum heat dissipation units are arranged in the battery box in parallel. The liquid inlet and outlet interfaces of the liquid cooling plate are connected with the pipeline system through the pagoda mouth interface, and the pipeline system can be connected into each liquid cooling plate monomer in a parallel connection mode. Therefore, a complete lithium ion battery thermal management system can be formed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A lithium battery heat dissipation device for a new energy automobile battery is characterized by comprising a flow battery monomer (1) which can be used as a heat dissipation liquid cold plate after being modified, a lithium battery (2) which is subjected to liquid cooling heat dissipation, and a connecting piece (3) which is used for connecting all parts of the flow battery monomer together; the flow battery single bodies (1) are arranged between the lithium batteries (2) in a clamping mode; the two lithium batteries (2) and the clamped single flow battery (1) jointly form a minimum heat dissipation unit of the lithium battery heat dissipation device;
the flow battery monomer (1) comprises a battery diaphragm (7) in the middle, positive/negative flow field plates (4) at the two extreme sides, positive/negative electrodes (5) and positive/negative electrode frames (6); the flow battery monomer (1) clamps the positive/negative electrode frame (6) provided with the positive/negative electrode (5) through all the components according to the arrangement mode that the battery diaphragm (7) is arranged in the middle and the positive/negative flow field plates (4) are oppositely arranged at two sides to form an integrated structure and is fixedly connected together, wherein the positive/negative electrode frame (6) is provided with the positive/negative electrode (5);
the improved flow battery monomer (1) which can be used as a heat dissipation liquid cooling plate removes an end plate and a current collecting plate structure on the traditional flow battery structure, the positive/negative flow field plate (4) is made of copper with high heat conductivity, and an electrolyte flow channel is processed on the positive/negative flow field plate and subjected to surface corrosion prevention treatment.
2. The lithium battery heat dissipation device for the new energy automobile battery is characterized by further comprising a liquid storage tank and an infusion pump, wherein the liquid storage tank is used for storing electrolyte solution conveyed to the single flow battery (1) during liquid cooling heat dissipation, a liquid inlet of the liquid storage tank is connected with an electrolyte outlet of the single flow battery (1) through a pipeline, a liquid inlet end of the infusion pump is connected into the liquid storage tank, and a liquid outlet end of the infusion pump is connected with an electrolyte inlet of the single flow battery (1) through a pipeline.
3. The lithium battery heat dissipation device for the new energy automobile battery as claimed in claim 1 or 2, wherein the flow battery cells (1) comprise one or more; the number of the lithium batteries (2) is at least two.
4. The lithium battery heat dissipation device for the new energy automobile battery is characterized in that the positive electrode of the positive/negative electrode (5) is a carbon felt, carbon cloth or carbon paper electrode with a three-dimensional porous structure, and the negative electrode of the positive/negative electrode (5) is a carbon felt, carbon paper, carbon cloth, copper foam, nickel foam, titanium foam or stainless steel foam material; the battery diaphragm (7) is an anion exchange membrane, a cation exchange membrane or a porous diaphragm.
5. The lithium battery heat dissipation device for the new energy automobile battery as claimed in claim 3, wherein the flow battery cell (1) is formed into an integrated structure by clamping a positive/negative electrode frame (6) provided with a positive/negative electrode (5) through all the components according to an arrangement mode of a battery diaphragm (7) in the middle and positive/negative flow field plates (4) on two sides, and is fixedly connected together through a connecting piece (3); all be provided with connecting hole (8) on positive/negative pole flow field board (4), positive/negative pole electrode frame (6), connecting piece (3) are the bolt, connecting hole (8) are the screw with connecting piece (3) matched with, connecting hole (8) are seted up at the edge all around of positive/negative pole flow field board (4), positive/negative pole electrode frame (6).
6. The lithium battery heat dissipation device for the new energy automobile battery as claimed in claim 3, wherein the flow battery cell (1) is formed by clamping a positive/negative electrode frame (6) provided with a positive/negative electrode (5) through all the components according to an arrangement mode of a battery diaphragm (7) in the middle and positive/negative flow field plates (4) in two opposite sides to form an integrated structure, and is fixedly connected together through glue sealing.
7. The lithium battery heat dissipation device for the new energy automobile battery as claimed in claim 3, wherein the inner side surface of the positive/negative electrode flow field plate (4) is provided with a flow channel (9), the flow channel (9) is a serpentine flow field or an interdigital flow field or a stepped interdigital flow field, the cross-sectional dimension depth of the flow channel (9) is 0.2-5mm, the width is 0.2-20mm, and the rib width between two flow channels is 0.2-20 mm; electrolyte solution inlet/outlet ports (10) are formed in the upper end and the lower end of one side of the positive/negative electrode flow field plate (4), and the electrolyte solution inlet/outlet ports (10) are used for being connected with positive and negative electrode pipelines for conveying electrolyte solutions.
8. The lithium battery heat dissipation device for the new energy automobile battery according to claim 7, wherein the thickness of the flow battery cell (1) is 2-6mm, wherein the thickness of the positive/negative flow field plate (4) is 0.5-3mm, the material of the positive/negative flow field plate (4) is copper or aluminum, the surface of the positive/negative flow field plate is attached with a gold, titanium carbide, titanium nitride or chromium carbide anti-corrosion coating, and the flow field part of the positive/negative flow field plate (4) is communicated with the positive/negative electrode (5) through an electrolyte solution.
9. The lithium battery heat dissipation device for the new energy automobile battery as claimed in claim 7 or 8, wherein the positive/negative flow field plates (4) of the flow battery cell (1) are communicated with an electrolyte solution in the flow channel (9), and the electrolyte solution is ZnI2An aqueous solution, with or without KCl or NaCl supporting electrolyte.
10. The lithium battery heat dissipation device for the new energy automobile battery according to claim 1, wherein the positive/negative electrode frame (6) is made of a fluorine film, a silicon sheet or a rubber sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911269424.7A CN110994079B (en) | 2019-12-11 | 2019-12-11 | Lithium battery heat dissipation device for new energy automobile battery |
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