CN110556604A - Lithium ion soft package battery - Google Patents
Lithium ion soft package battery Download PDFInfo
- Publication number
- CN110556604A CN110556604A CN201710503415.4A CN201710503415A CN110556604A CN 110556604 A CN110556604 A CN 110556604A CN 201710503415 A CN201710503415 A CN 201710503415A CN 110556604 A CN110556604 A CN 110556604A
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- CN
- China
- Prior art keywords
- heat
- heat conduction
- collection
- flow channel
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 22
- 239000012530 fluid Substances 0.000 claims abstract description 31
- 239000011149 active material Substances 0.000 claims abstract description 10
- 238000004806 packaging method and process Methods 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000003792 electrolyte Substances 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims 2
- 239000007774 positive electrode material Substances 0.000 abstract description 4
- 239000007773 negative electrode material Substances 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 description 12
- 239000011257 shell material Substances 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000009413 insulation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- -1 transition metal nitride Chemical class 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—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
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
-
- 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
-
- 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
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
-
- 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
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
-
- 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
-
- 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
Abstract
The lithium ion soft package battery comprises a packaging bag, a positive tab, a negative tab and a battery cell accommodated in the packaging bag, wherein the positive tab and the negative tab respectively extend out of the packaging bag, the positive plate comprises a positive current collector and a positive active material layer coated on the positive current collector, the negative plate comprises a negative current collector and a negative active material layer coated on the negative current collector, the battery is characterized in that the positive plate or/and the negative plate is/are provided with a heat conduction and heat collection body, the heat conduction and heat collection body is a current collector which is not coated with an active material layer on the front part or/and the back part of the positive current collector or/and the negative current collector, at least more than two heat conduction and heat collection bodies are vertically stacked in the same region to form a heat collection flow channel for heat conduction and heat collection, the heat collection flow channel forms a heat collection flow channel for heat energy to enter and exit from the battery core, the heat collection flow channel is stacked or connected with a fluid flow channel part, and the. The problems of over-high or over-low temperature of the battery and the like can be effectively solved.
Description
(I) technical field
The invention relates to a lithium ion battery, in particular to a lithium ion soft package battery.
(II) background of the invention
Traffic brings double pressure to energy crisis and environmental pollution, and efficient, clean and safe new energy automobiles are urgently needed to be vigorously developed and researched to realize energy conservation and emission reduction. The lithium ion battery becomes the best candidate for a new energy automobile power system due to the advantages of high specific energy, no pollution, no memory effect and the like. However, lithium ion batteries are very temperature sensitive, and the battery pack can only discharge with high efficiency and maintain good performance in a proper temperature range. The high temperature can lead the aging speed of the lithium ion battery to be fast, the thermal resistance to be increased and fast, the cycle times to be less, the service life to be shortened, and even the thermal runaway of the battery and other problems to be caused; low temperatures can reduce the conductivity of the electrolyte, reduce the ability to conduct active ions, increase impedance, and reduce capacity.
in the prior art, the purposes of improving a fluid flow channel and increasing heat dissipation are achieved by changing the placing position of a battery core; or through the improvement of the battery shell, for example, the shell material is replaced by aluminum alloy and is prepared by compounding thermoelectric material and aluminum material, and a plurality of radiating convex edges are additionally arranged on the side surface of the shell; or the electrode plates extend into the electrolyte, the energy is transmitted to the battery shell through the electrolyte, and then the energy is transmitted to the outside of the battery through the battery shell. Although the prior art can play a certain role in heat dissipation, heat still can not be directly conducted out of the battery from the pole piece of the main heating part, and the heat conduction and heat dissipation effects are poor. Therefore, research on a novel lithium ion soft package battery is urgently needed.
Disclosure of the invention
Aiming at the defects of the prior art, the invention provides a lithium ion soft package battery which can effectively solve the problems of overhigh or overlow battery temperature and the like.
The technical scheme of the invention is as follows: lithium ion soft package battery, including wrapping bag, anodal ear, negative pole ear, hold in electric core in the wrapping bag, anodal ear and negative pole ear stretch out the wrapping bag respectively, the electric core includes coiling each other or superimposed positive plate, negative pole piece and set up in positive plate with the diaphragm between the negative pole piece, positive plate includes anodal mass flow body and the anodal active material layer of coating on anodal mass flow body, the negative pole piece includes negative current collector and the negative pole active material layer of coating on the negative current collector, its characterized in that is provided with heat conduction thermal-arrest body on anodal plate or/and the negative pole piece, heat conduction thermal-arrest body is the mass flow body that the front part of anodal mass flow body or/and negative current collector or/and the local active material layer of not coating in reverse side, the heat collection runner of heat conduction thermal-arrest is folded into in same region from top to, the heat energy of the battery core enters and exits the heat sink flow channel, the heat sink flow channel is overlapped or connected with a fluid flow channel part, and the fluid flow channel part is arranged on the same side of the negative pole ear and extends out of the battery shell. Therefore, the heat on the pole piece of the main heating part can be quickly concentrated on the heat-conducting heat-collecting body, and then is quickly led out through the heat exchange device arranged on the heat-conducting heat-collecting body, so that the overhigh temperature of the battery is avoided; meanwhile, the heat-conducting and heat-collecting body is overlapped in the same upper and lower areas to form a heat-collecting flow channel, and the heat-collecting flow channel is heated or cooled through the fluid flow channel part, so that the internal temperature of the battery can be increased or reduced, the battery is always kept at a proper working temperature, the working efficiency of the battery is improved, the service life of the battery is prolonged, and potential safety hazards are eliminated; the heat conduction and collection body can be integrally formed with the positive plate, so that the process is simplified, and the production efficiency is improved.
the invention is also characterized in that the fluid flow channel component is a flow channel metal plate or a flow channel plastic piece.
The invention is also characterized in that the runner metal plate or the runner plastic part is provided with an inlet and an outlet for liquid.
the invention is also characterized in that an insulating layer is arranged in the runner of the runner metal plate or the runner plastic part.
The invention is also characterized in that the outer surface of the runner metal plate or the runner plastic part is provided with an insulating layer.
The invention is also characterized in that a heat transfer metal layer is arranged in the runner of the runner metal plate or the runner plastic part.
The invention is also characterized in that the outer surface of the runner metal plate or the runner plastic part is provided with a heat transfer metal layer.
Optionally, the present invention is further characterized in that the heat sink channel is formed by welding and fixing the heat conductive and collecting body. Therefore, the heat conduction and collection bodies can be fixedly connected together without additionally adding components, heat can be quickly led in and out through the heat collection flow channel, and the battery is controlled within a proper temperature range.
The invention is also characterized in that the welding is ultrasonic welding, laser welding or friction welding.
Optionally, the present invention is further characterized in that the heat collecting channel is formed by bolting or riveting the heat conductive and collecting body. Therefore, the heat conduction and collection bodies can be fixedly connected together, heat can be quickly led in and out through the heat collection flow channel, and the battery is controlled within a proper temperature range.
Optionally, the present invention is further characterized in that the heat collecting channel is formed by bending and fixing a plurality of layers of the heat conducting and collecting bodies into a whole. Therefore, the heat on the heat conduction and collection body is more beneficial to being concentrated on the heat collection flow passage, and is beneficial to heat dissipation or heating.
Furthermore, the invention is characterized in that the heat conduction and collection body is bent to be perpendicular to the positive plate or the inclination angle is 0-89 degrees. Therefore, the heat on the heat conduction and collection body is more beneficial to being concentrated on the heat collection flow passage, and is beneficial to heat dissipation or heating.
Optionally, the present invention is further characterized in that the heat collecting channel is formed by fixing a plurality of layers of heat conducting and collecting bodies in a one-way bending manner. Therefore, the heat sink flow passage is convenient to install and is beneficial to heat dissipation or heating.
Optionally, the present invention is further characterized in that the heat collecting channel is formed by bending and fixing a plurality of layers of the heat conducting and collecting bodies in forward and reverse directions. Thus, the heat sink flow path facilitates heat dissipation or heating.
Optionally, the present invention is further characterized in that the heat collecting channel is formed by fixing a part of the heat conducting and collecting body bent in multiple layers and a straight heat conducting and collecting body. Thus, the heat sink flow path facilitates heat dissipation or heating.
Optionally, the invention is further characterized in that part of the heat conduction and collection body which is bent in multiple layers is bent in a single direction. Therefore, the heat sink flow passage is convenient to install and is beneficial to heat dissipation or heating.
Optionally, the invention is further characterized in that part of the heat conduction and collection body which is bent in multiple layers is bent in the positive and negative directions. Thus, the heat sink flow path facilitates heat dissipation or heating.
optionally, the invention is further characterized by a part or all of the perforations or 3D reliefs of the heat conducting and collecting body. Thus, the surface area of the heat conduction and collection body is increased, and heat dissipation or heating is facilitated.
Optionally, the present invention is further characterized in that a heat conducting and collecting component with a through hole, a mesh shape, a 3D through hole, and a 3D concave-convex shape is sandwiched between the heat conducting and collecting bodies. Thus, the heat dissipation or heating capacity of the heat conduction and collection body is better.
Optionally, the invention is also characterised in that the heat sink flow passage is provided with a thermal connection. In this way, the thermal connector can quickly direct heat into or out of the heat sink.
Further, the present invention is characterized in that the thermal connecting member is a heat sink. Thus, the heat sink can quickly conduct heat away from the heat sink.
Further, the present invention is characterized in that the thermal connecting member is a metal sheet. In this way, the metal sheet can rapidly conduct heat out of the heat sink flow passage.
furthermore, the invention is characterized in that the metal sheet and the heat conduction and collection body are made of the same material. Thus, the metal sheet and the heat conducting and collecting body are more favorable for connection.
Optionally, the invention is also characterized in that fins are arranged between or on the surfaces of the heat-conducting and heat-collecting bodies. Therefore, the heat on the heat conduction and collection body can be quickly led out through the fins, and the temperature of the battery is further reduced.
Optionally, the present invention is further characterized in that a heat sink is disposed on the heat conducting and collecting body. In this way, the heat conducting and collecting body is controlled within a proper temperature range through the heat sink.
Optionally, the invention is further characterised in that the heat sink flow path is provided with heat exchange members. Therefore, the temperature of the heat sink flow passage can be controlled within a proper range through the heat exchange component, and the performance of the battery is prevented from being damaged.
Further, the present invention is characterized in that the heat sink flow path is integrally welded to the heat exchange member. Therefore, the heat sink flow passage and the heat exchange part can be firmly connected without adding an additional part, and the connection is also more convenient.
Further, the present invention is characterized in that the heat sink flow path is bolted, glued or riveted to the heat exchange member. In this way, the heat sink channel and the heat exchange member can be firmly connected together.
Optionally, the present invention is further characterized in that the surface of the heat conducting and collecting body is provided with an insulating layer, an insulating heat conducting layer or an insulating film. Thus, the danger of short circuit, explosion and the like in the battery can be avoided.
Optionally, the invention also features an insulating layer or film on the surface of the heat sink flow path. Thus, the danger of short circuit, explosion and the like in the battery can be avoided.
Optionally, the present invention is further characterized in that the heat sink flow path is located on at least one of the same side, the opposite side, and the adjacent side of the positive electrode tab.
Optionally, the invention is further characterized in that one or two or three of the heat sink channels are provided on one side of the positive electrode tab. Thus, heat is more advantageously conducted into or out of the heat sink.
Optionally, the present invention is further characterized in that the heat conduction and collection body protrudes from the positive plate. Thus, heat is advantageously conducted in or out.
Furthermore, the invention is characterized in that the protruded heat conduction and collection body extends into the electrolyte in the packaging bag. Therefore, the heat of the heat conduction and collection body can be conducted into the electrolyte, and the heat is quickly transferred to the surface of the battery through the electrolyte, so that the danger caused by the heat gathering in the battery due to poor heat transfer performance of the diaphragm is avoided; meanwhile, heat in the electrolyte can be quickly led into the pole piece through the heat conduction and collection body, and the condition that the temperature of the battery is too low is avoided.
Further, the present invention is characterized in that the electrolyte has a heat exchanger for heating or cooling the electrolyte. Thus, the electrolyte can maintain the battery temperature within a proper range by heating or cooling the heat conductive heat collector.
Optionally, the present invention is further characterized in that the heat conducting and collecting body is recessed in the positive plate. Thus, the internal space of the battery can be saved, and the capacity of the battery with the same volume can be larger.
Optionally, the present invention is further characterized in that the width of the connecting portion of the heat conduction and heat collection body and the positive plate is the same. Thus, the heat conducting performance is good, and the manufacturing process is simple.
Optionally, the present invention is further characterized in that the open-faced current collector is parallel to the positive electrode active material layer.
furthermore, the invention is characterized in that the open-surface current collector is a full current collector.
Optionally, the invention is further characterized in that the open-surface current collector covers the middle part of the positive active material layer on the same side.
Optionally, the present invention is further characterized in that a temperature sensor is disposed on the heat sink flow path. In this way, temperature data on the heat sink flow path can be accurately obtained.
Optionally, the present invention is further characterized in that a temperature sensor is provided on the heat exchange member. In this way, temperature data on the heat exchange member can be accurately obtained.
Further, the present invention is characterized in that the temperature sensor is a thin film temperature sensor.
Optionally, the invention is further characterized in that the positive active material is lithium iron phosphate, lithium cobaltate, lithium manganate or a ternary material.
Optionally, the invention is further characterized in that the negative active material is a carbon negative material, a tin-based negative material, a lithium-containing transition metal nitride negative material or an alloy negative material.
(IV) description of the drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic cross-sectional view of the structure of FIG. 1;
FIG. 3 is a schematic structural view of embodiment 3 of the present invention;
FIG. 4 is a schematic cross-sectional view of FIG. 3;
FIG. 5 is a schematic structural view of embodiment 5 of the present invention;
FIG. 6 is a schematic structural view of embodiment 6 of the present invention;
FIG. 7 is a schematic structural view of embodiment 7 of the present invention;
FIG. 8 is a schematic structural view of example 8 of the present invention;
FIG. 9 is a schematic structural view of example 9 of the present invention;
FIG. 10 is a schematic illustration of the structure of FIG. 9 of the present invention;
FIG. 11 is a schematic structural view of example 11 of the present invention;
FIG. 12 is a schematic illustration of the structure of FIG. 11 in accordance with the present invention;
FIG. 13 is a schematic structural view of example 13 of the present invention;
FIG. 14 is a schematic illustration of the structure of FIG. 13 in accordance with the present invention;
FIG. 15 is a schematic structural view of example 15 of the present invention;
FIG. 16 is a schematic structural view of example 16 of the present invention;
FIG. 17 is a schematic structural view of example 17 of the present invention.
(V) detailed description of the preferred embodiments
The present invention will be described in further detail with reference to the accompanying drawings.
The technical scheme of the invention is as follows: lithium ion soft package battery, including wrapping bag, anodal ear, negative pole ear, hold in electric core in the wrapping bag, anodal ear and negative pole ear stretch out the wrapping bag respectively, the electric core includes coiling each other or superimposed positive plate, negative pole piece and set up in positive plate with the diaphragm between the negative pole piece, positive plate includes anodal mass flow body and the anodal active material layer of coating on anodal mass flow body, the negative pole piece includes negative current collector and the negative pole active material layer of coating on the negative current collector, its characterized in that is provided with heat conduction thermal-arrest body on anodal plate or/and the negative pole piece, heat conduction thermal-arrest body is the mass flow body that the front part of anodal mass flow body or/and negative current collector or/and the local active material layer of not coating in reverse side, the heat collection runner of heat conduction thermal-arrest is folded into in same region from top to, the heat energy of the battery core enters and exits the heat sink flow channel, the heat sink flow channel is overlapped or connected with a fluid flow channel part, and the fluid flow channel part is arranged on the same side of the negative pole ear and extends out of the battery shell.
In each drawing, 1 is a battery shell, 2 is a battery core, 3 is a positive tab, 4 is a negative tab, 5 is a heat conduction and collection body, 6 is a heat inlet and outlet heat collection channel, 7 is a fluid channel component, 8 is a heat exchange device, and 9 is an insulating layer.
As shown in FIG. 1, the positive and negative electrode tabs are disposed at the same end, and the heat conduction and collection body and the fluid flow passage member are disposed at the opposite ends of the electrode tabs and connected with the positive electrode tabs. Fig. 2 is a schematic sectional view of fig. 1, wherein the heat conduction and collection body is connected with the positive tab 3.
As shown in FIG. 3, the positive and negative electrode tabs are disposed at the same end, and the heat conductive and collecting body and the fluid flow path member are disposed at the opposite ends of the electrode tabs and connected to the negative electrode tabs. Fig. 4 is a schematic cross-sectional view of fig. 3, wherein a heat conducting and collecting body is connected with the positive tab 3.
As shown in fig. 5, the heat conducting and collecting body is disposed at the same end as the positive and negative electrode tabs and between the positive and negative electrode tabs, and the fluid flow channel member connected to the heat conducting and collecting body enters from the negative electrode end of the battery and exits from the positive electrode end, and the entering end and the exiting end are both provided with an insulating layer for insulating the fluid flow channel member from the electrode tabs.
As shown in fig. 6, the heat conducting and collecting body is disposed at the same end as the positive and negative electrode tabs and between the positive and negative electrode tabs, and the fluid flow channel member connected to the heat conducting and collecting body enters from the negative electrode end of the battery and exits from the positive electrode end, and an insulating layer is disposed at the exit end to insulate the fluid flow channel member from the electrode tabs.
As shown in fig. 7, the positive and negative electrode tabs are disposed at opposite ends of the battery, the heat conduction and collection body is disposed at the positive electrode tab end and connected to the positive electrode tab, the fluid flow passage member connected to the heat conduction and collection body enters and exits from the same port of the battery, and the outlet end and the inlet end are both provided with insulating layers to insulate the fluid flow passage member from the electrode tabs, and at the same time, to achieve the effect of heat insulation.
As shown in fig. 8, the positive and negative electrode tabs are disposed at the same end of the battery, the heat conduction and collection body is disposed at the opposite end of the electrode tab, the fluid flow passage member connected to the heat conduction and collection body enters and exits from the same port of the battery, and the exit end and the entrance end are both provided with insulating layers to insulate the fluid flow passage member from the electrode tabs, and at the same time, to achieve the effect of thermal insulation.
As shown in fig. 9, the positive and negative electrode tabs are disposed at opposite ends of the battery, the heat conductive and collecting body is disposed at a side end of the battery, and the fluid flow path member connected to the heat conductive and collecting body enters from one port of the battery and exits from the other port. Fig. 10 is a cross-sectional view of fig. 9.
As shown in fig. 11, the positive and negative electrode tabs are disposed at the same end of the battery, the heat conductive and collecting body is disposed at the side end of the battery, and the fluid flow path member connected to the heat conductive and collecting body enters from one port of the battery and exits from the other port. Fig. 12 is a cross-sectional view of fig. 11.
As shown in fig. 13, the positive tab is disposed adjacent to the negative tab, the heat conductive and heat collecting body is disposed at the opposite end of the positive tab, and the fluid flow path member connected to the heat conductive and heat collecting body enters from one port of the battery and exits from the other port. Fig. 14 is a cross-sectional view of fig. 13.
As shown in fig. 15, the positive and negative electrode tabs are disposed at opposite ends of the battery, the heat conductive and collecting body is disposed at a side end of the battery, the fluid flow path member connected to the heat conductive and collecting body enters and exits from the same port of the battery, and a heat insulating layer is disposed between an entrance end and an exit end of the fluid flow path member.
as shown in fig. 16, the positive and negative electrode tabs are disposed at adjacent ends of the battery, the heat conductive and collecting body is disposed at a side end of the battery, the opposite end of the positive electrode tab, the fluid flow path member connected with the heat conductive and collecting body enters and exits from the same port of the battery, and a thermal insulation layer is disposed between an entrance end and an exit end of the fluid flow path member.
As shown in fig. 17, the positive and negative electrode tabs are disposed at the same end of the battery, the heat conductive and collecting body is disposed at the side end of the battery, the fluid flow passage member connected to the heat conductive and collecting body enters and exits from the same port of the battery, and a thermal insulation layer is disposed between the inlet end and the outlet end of the fluid flow passage member.
The foregoing is illustrative of specific embodiments of the present invention and reference should be made to the implementation of apparatus and structures not specifically described herein, which is understood to be a general purpose apparatus and method of operation known in the art.
Meanwhile, the above embodiments of the present invention are only used for illustrating the technical solutions of the present invention, and are only examples of the technical solutions of the present invention, and are not used to limit the technical solutions of the present invention and the protection scope thereof. Modifications of the technical solutions disclosed in the claims and the specification by equivalent technical means, equivalent devices and the like should be considered as not exceeding the scope of the claims and the specification of the invention.
Claims (10)
1. Lithium ion soft package battery, including wrapping bag, anodal ear, negative pole ear, hold in electric core in the wrapping bag, anodal ear and negative pole ear stretch out the wrapping bag respectively, the electric core includes coiling each other or superimposed positive plate, negative pole piece and set up in positive plate with the diaphragm between the negative pole piece, positive plate includes anodal mass flow body and the anodal active material layer of coating on anodal mass flow body, the negative pole piece includes negative current collector and the negative pole active material layer of coating on the negative current collector, its characterized in that is provided with heat conduction thermal-arrest body on anodal plate or/and the negative pole piece, heat conduction thermal-arrest body is the mass flow body that the front part of anodal mass flow body or/and negative current collector or/and the local active material layer of not coating in reverse side, the heat collection runner of heat conduction thermal-arrest is folded into in same region from top to, the heat energy of the battery core enters and exits the heat sink flow channel, the heat sink flow channel is overlapped or connected with a fluid flow channel part, and the fluid flow channel part is arranged on the same side of the negative pole ear and extends out of the battery shell.
2. The lithium ion pouch cell of claim 1, wherein said fluid flow channel member is a flow channel metal plate or a flow channel plastic part; or the runner metal plate or the runner plastic part is provided with a liquid inlet and a liquid outlet; or an insulating layer is arranged in the runner of the runner metal plate or the runner plastic part; or the outer surface of the runner metal plate or the runner plastic part is provided with an insulating layer; or a heat transfer metal layer is arranged in the runner of the runner metal plate or the runner plastic part; or the outer surface of the runner metal plate or the runner plastic part is provided with a heat transfer metal layer.
3. the lithium ion soft package battery of claim 2, wherein at least two or more heat conductive and heat collecting bodies are stacked in the same region at intervals up and down to form a heat collecting channel for heat conduction and heat collection of a sandwich core, thereby forming a heat collecting channel for heat energy of the battery cell to enter and exit.
4. The lithium ion pouch battery according to claim 2, wherein the heat sink channel is formed by welding and fixing a heat conductive and collecting body; or the heat sink flow channel is formed by welding and fixing the heat conduction and collection body.
5. The lithium ion pouch cell of claim 4, wherein said weld is an ultrasonic weld, a laser weld, or a friction weld.
6. The lithium ion pouch battery according to claim 2, wherein the heat sink channel is formed by bolting or riveting a heat conductive and collecting body.
7. The lithium ion pouch battery according to claim 3, wherein the heat sink channel is formed by bending and fixing a plurality of layers of the heat conductive and collecting body into a whole.
8. The lithium ion soft package battery according to any one of claims 1 to 7, wherein the included angle between the heat conducting and collecting body bend and the positive plate is 0-90 °; or the heat collection flow channel is formed by fixing a plurality of layers of heat conduction and collection bodies into a whole in a one-way bending manner; or the heat collection flow channel is formed by forward and backward bending and fixing a plurality of layers of heat conduction and collection bodies into a whole; or the heat collection flow channel is formed by fixing the heat conduction and collection body which is bent in multiple layers and the straight heat conduction and collection body into a whole; or the heat conduction and collection body with multiple layers of bends is a forward bend and a reverse bend; or the heat sink flow channel is formed by welding a part of multi-layer heat conduction and collection body bent and a straight heat conduction and collection body into a whole; or partial or all perforations or 3D concave-convex of the heat conduction and collection body; or a heat conduction and heat collection component with a perforation, a net shape, a 3D perforation and a 3D concave-convex shape is clamped between the heat conduction and heat collection bodies; or the heat conduction and heat collection bodies are provided with self-bent through holes, meshes, 3D through holes and 3D concave-convex heat conduction and heat collection bodies; or the heat sink flow passage is provided with a heat connecting piece; or the thermal connector is a heat sink; or the thermal connector is a metal sheet; or the metal sheet is a multi-metal sheet; or the metal sheet and the heat conduction and collection body are made of the same material; or fins are arranged between or on the surface of the heat conduction and collection body; or the heat conducting and collecting body is provided with a heat sink.
9. The lithium ion pouch cell of any of claims 1 to 7, wherein the heat sink flow path is provided with a heat exchange member; or the heat sink flow passage and the heat exchange part are welded into a whole; or the heat collecting flow channel and the heat exchange part are bolted, cemented or riveted into a whole; or the surface of the heat conduction and collection body is provided with an insulating layer, an insulating heat conduction layer or an insulating film; or the surface of the heat sink flow passage is provided with an insulating layer or an insulating film; or the heat sink flow channel is positioned on at least one of the same side, the opposite side and the adjacent side of the positive electrode lug; or one or two or three heat sink flow channels are arranged on one side of the positive electrode lug; or the heat conduction and collection body protrudes out of the positive plate; or the protruded heat conduction and collection body extends into the electrolyte in the packaging bag.
10. The lithium ion pouch cell according to any of claims 1 to 7, wherein the electrolyte is provided with a heat exchanger for heating or cooling the electrolyte; or the heat conduction and collection body is sunken in the positive plate; or the width of the connecting part of the heat conduction and heat collection body and the positive plate is the same; or a temperature sensor is arranged on the heat sink flow passage; or a temperature sensor is arranged on the heat exchange component; or the temperature sensor is a film temperature sensor or a fiber grating temperature sensor; or the temperature sensor is a film temperature sensor or a fiber grating temperature sensor.
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| CN201710503415.4A CN110556604A (en) | 2017-06-28 | 2017-06-28 | Lithium ion soft package battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710503415.4A CN110556604A (en) | 2017-06-28 | 2017-06-28 | Lithium ion soft package battery |
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| CN110556604A true CN110556604A (en) | 2019-12-10 |
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Effective date of registration: 20210122 Address after: Room 702, superstar entrepreneurial base, No.8 Lujing Road, Changsha high tech Development Zone, Changsha City, Hunan Province, 410205 Applicant after: Changsha Juneng new energy Co.,Ltd. Address before: Room 706, superstar entrepreneurial base, No.8 Lujing Road, high tech Development Zone, Changsha City, Hunan Province, 410205 Applicant before: HUNAN MELSEN CAR POWER Co.,Ltd. |
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Application publication date: 20191210 |