CN110571435A - Lithium ion power battery - Google Patents
Lithium ion power battery Download PDFInfo
- Publication number
- CN110571435A CN110571435A CN201710503649.9A CN201710503649A CN110571435A CN 110571435 A CN110571435 A CN 110571435A CN 201710503649 A CN201710503649 A CN 201710503649A CN 110571435 A CN110571435 A CN 110571435A
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- China
- Prior art keywords
- heat
- positive
- heat conduction
- collection
- negative
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 17
- 239000012530 fluid Substances 0.000 claims abstract description 65
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 20
- 239000003792 electrolyte Substances 0.000 claims abstract description 18
- 239000007774 positive electrode material Substances 0.000 claims abstract description 14
- 239000007773 negative electrode material Substances 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 claims description 2
- 229910052723 transition metal Inorganic materials 0.000 claims description 2
- -1 transition metal nitride Chemical class 0.000 claims description 2
- 239000010408 film Substances 0.000 claims 2
- 239000010409 thin film Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000011257 shell material Substances 0.000 description 17
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 210000005069 ears Anatomy 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000032683 aging Effects 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
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 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
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 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
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
-
- 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
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
-
- 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
- H01M4/70—Carriers or collectors characterised by shape or form
-
- 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 invention discloses a lithium ion power battery, which comprises a battery cell, a metal shell, electrolyte and a top cover fixedly connected to the metal shell; the battery cell comprises a positive plate, a negative plate and a diaphragm; the positive plate and the negative plate are respectively provided with a positive electrode tab and a negative electrode tab; the top cover is provided with a positive pole column and a negative pole column; the negative plate comprises a negative current collector and a negative active material layer; the positive plate comprises a positive current collector and a positive active material layer, and is characterized in that the positive plate is 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 the positive active material layer on the front part or/and the back part of the positive current collector, at least more than two heat conduction and heat collection bodies are overlapped to form a heat collection flow channel, the heat collection flow channel is overlapped or connected with a fluid flow channel part, and the fluid flow channel is exposed from the narrow surface of the shell. The invention can effectively solve the problems of over-high or over-low temperature of the battery and the like, and achieves the effects of controlling temperature, prolonging the service life of the battery, improving the production efficiency and the like.
Description
(I) technical field
The invention relates to a lithium ion battery, in particular to a lithium ion power 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 within 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 to be fast, the cycle times to be less, the service life to be shortened, and even the problems of thermal runaway of the battery and the like to be caused; the low temperature causes the conductivity of the electrolyte to decrease, the ability to conduct active ions to decrease, the impedance to increase, and the capacity to decrease.
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 the aluminum alloy and is prepared by compounding the thermoelectric material and the 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 led 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 new lithium ion power battery is urgently needed.
Disclosure of the invention
Aiming at the defects of the prior art, the invention provides a lithium ion power battery which can effectively solve the problems of over-high or over-low temperature and the like of the battery, and achieves the effects of controlling temperature, prolonging the service life of the battery, improving the production efficiency and the like.
The technical scheme of the invention is as follows:
The lithium ion power battery comprises a battery cell, a metal shell for accommodating the battery cell, electrolyte injected into the metal shell and a top cover fixedly connected to the metal shell; the battery cell comprises a positive plate, a negative plate and a diaphragm which is arranged between the positive plate and the negative plate at intervals, and the battery cell is manufactured by sequentially laminating or winding; the positive plate is provided with a positive lug; the negative plate is provided with a negative electrode tab; the top cover is provided with an anode pole column electrically connected with the anode tab and a cathode pole column electrically connected with the cathode tab; the negative plate comprises a negative current collector and a negative active material layer coated on the negative current collector; the positive plate comprises a positive current collector and a positive active material layer coated on the positive current collector, and is characterized in that the positive plate is 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 the positive active material layer on the front part or/and the back part of the positive current collector, heat conduction and heat collection flow passages are formed by overlapping the heat conduction and heat collection bodies in the same area from top to bottom to form a heat energy inlet and outlet heat collection flow passage of the battery cell, the heat collection flow passages are overlapped or connected with a fluid flow passage component, and the fluid flow passages are exposed from the narrow surface. Therefore, the heat conduction and collection body and the positive plate are integrally formed, the process is simplified, the production efficiency is improved, the heat conduction and collection body is overlapped in the upper region and the lower region to form a heat sink flow channel, the heat sink flow channel is heated or cooled through the fluid flow channel part, 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 fluid flow channels are exposed from the narrow surface of the shell, which is beneficial to the connection of the flow channels on each shell and fully utilizes the space of the battery.
The heat sink flow channel is formed by welding and fixing a heat conduction and collection body. Therefore, the heat conduction and collection body is overlapped and fixed in a welding mode to form the heat collection channel, so that the combination is firm, the quality of the battery is favorably reduced, and the energy density of the battery is improved.
the welding is ultrasonic welding, laser welding or friction welding.
The heat collecting flow channel is formed by fixedly bolting or riveting a heat conducting and collecting body. Therefore, the heat-conducting heat-collecting body is overlapped and fixed in a bolting or riveting mode to form a heat sink flow passage, and the diaphragm and the like cannot be damaged.
The heat collecting flow channel is formed by bending and fixing a plurality of layers of heat conducting and collecting bodies into a whole. Thus, the heat on the heat conduction and collection body is more beneficial to be concentrated on the heat collection flow passage, and is beneficial to cooling or heating.
The included angle between the bent heat conduction and collection body and the positive plate is 0-90 degrees. Thus, the heat of the heat-conducting heat-collecting body is more favorably concentrated in the heat-collecting flow passage, and is favorable for cooling or heating.
The heat collection flow channel is formed by fixing a plurality of layers of heat conduction and collection bodies in a one-way bending mode. Therefore, the heat sink flow passage is convenient to install and is beneficial to cooling or heating.
The heat collecting flow channel is formed by bending and fixing a plurality of layers of heat conducting and collecting bodies in the forward direction and the reverse direction into a whole. Therefore, the heat conduction and collection bodies are well contacted, and the heat collection flow channel is favorable for cooling or heating.
The heat collecting flow channel is formed by fixing part of the heat conduction and heat collection body which is bent in multiple layers and the straight heat conduction and heat collection body into a whole. Thus, the heat conducting and collecting bodies are well contacted, and the heat collecting flow passage is favorable for cooling.
And part of the heat conduction and collection body which is bent in multiple layers is bent in a single direction. Thus, the process is relatively simple.
And part of the heat conduction and collection body which is bent in multiple layers is bent in the positive and reverse directions. Therefore, the heat conduction and collection bodies are well contacted, and the heat collection flow channel is favorable for cooling or heating.
And part or all of the heat conduction and collection body is perforated or is 3D concave-convex. Thus, the surface area of the heat conduction and collection body is increased, and cooling or heating is facilitated.
And a heat conduction and collection component with a through hole, a net shape, a 3D through hole and a 3D concave-convex shape is clamped between the heat conduction and collection bodies. Thus, the surface area of the heat conduction and collection body is increased, and cooling or heating is facilitated.
the heat conduction and heat collection body is provided with bent through holes, meshes, 3D through holes and 3D concave-convex self heat conduction and heat collection bodies. Thus, the heat conduction and collection body has good cooling or heating effect.
The surface of the heat conduction and collection body is provided with an insulating layer, an insulating heat conduction layer or an insulating film. Therefore, short circuit at the heat conduction and collection body can be avoided, and potential safety hazards are eliminated.
The surface of the heat sink channel is provided with an insulating layer or an insulating film. Therefore, short circuit at the heat sink flow passage can be avoided, and safety hidden danger is eliminated.
The heat sink flow channel is positioned on at least one side of the same side, the opposite side and the adjacent side of the positive electrode lug. Thus, the position of the heat sink flow passage can be set as required.
One or two or three heat sink flow channels are arranged on one side of the positive pole lug. Therefore, the number of the heat sink flow channels can be set according to requirements, and the temperature of the battery can be better controlled.
the heat conduction and collection body protrudes out of the positive plate. Therefore, the heat conduction and collection body is overlapped, and heat is led in or/and led out.
The protruded heat conduction and collection body extends into the electrolyte in the battery shell. Therefore, the heat of the heat conduction and collection body can be led 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 inside 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.
The electrolyte is provided with a heat exchanger for heating or cooling the electrolyte. Thus, the electrolyte is heated or cooled by the heat exchange device, and then the electrolyte heats or cools the heat conduction heat collector, so that the temperature of the battery is maintained in a proper range.
The heat conduction and collection body is recessed in the positive plate. Thus, the weight of the battery is reduced, and the energy density of the battery is improved.
The connecting part of the heat conduction and collection body and the positive plate is the same width. Therefore, under the condition of not increasing the weight of the battery, the contact area of the heat conduction and collection body and the connection part of the positive plate is the largest, and the heat conduction effect is the best.
The open-faced current collector is parallel to the positive active material layer. Therefore, the production process is convenient and the production efficiency is high.
The open-surface current collector is a full current collector. Thus, the heat conduction effect is good.
The exposed current collector covers the middle part of the positive active material layer at the same side.
And a temperature sensor is arranged on the heat sink flow passage. Therefore, the temperature on the heat sink flow passage can be accurately monitored, and the purpose of controlling the temperature of the heat sink flow passage is achieved.
The temperature sensor is a film temperature sensor. Therefore, the temperature can be accurately monitored, the weight is small, and the energy density of the battery can be improved.
The laminates are composite laminates or bagged or fine laminate laminates.
The positive active material is lithium iron phosphate, lithium cobaltate, lithium manganate or a ternary material.
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.
The fluid flow path member has an inlet and an outlet for fluid.
The inner wall of the fluid flow passage part flow passage is provided with an insulating layer or/and the joint of the fluid flow passage is provided with an insulating layer. Therefore, short circuit caused by the fluid flow passage part can be avoided, and potential safety hazards are eliminated.
The fluid flow passage member has an insulating layer on an outer surface thereof. Therefore, short circuit caused by the fluid flow passage part can be avoided, and potential safety hazards are eliminated.
The fluid flow passage part is a fluid flow passage pipe fitting or an air conditioner refrigerant pipe fitting or a heat pipe consisting of a pipe shell and a liquid absorption core. Thus, the heating or cooling effect is good.
Fins are provided in the fluid flow path member. Thus, the heat conduction of the fluid flow passage member is more facilitated.
(IV) description of the drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
Fig. 2 is a schematic diagram of a cell structure in fig. 1;
FIG. 3 is a schematic cross-sectional view of FIG. 2;
fig. 4 is a schematic cross-sectional structure diagram of a battery cell;
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 structural view of example 10 of the present invention
FIG. 11 is a schematic structural view of example 11 of the present invention;
FIG. 12 is a schematic structural view of example 12 of the present invention;
fig. 13 is a schematic structural view of embodiment 13 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: the lithium ion power battery comprises a battery cell, a metal shell for accommodating the battery cell, electrolyte injected into the metal shell and a top cover fixedly connected to the metal shell; the battery cell comprises a positive plate, a negative plate and a diaphragm which is arranged between the positive plate and the negative plate at intervals, and the battery cell is manufactured by sequentially laminating or winding; the positive plate is provided with a positive tab; the negative plate is provided with a negative electrode tab; the top cover is provided with an anode pole column electrically connected with the anode tab and a cathode pole column electrically connected with the cathode tab; the negative plate comprises a negative current collector and a negative active material layer coated on the negative current collector; the positive plate comprises a positive current collector and a positive active material layer coated on the positive current collector, and is characterized in that the positive plate is 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 the positive active material layer on the front part or/and the back part of the positive current collector, heat conduction and heat collection bodies are overlapped into a heat collection flow channel of the heat conduction and heat collection heat in the same area from top to bottom to form a heat energy inlet and outlet heat collection flow channel of the battery cell, the heat collection flow channel is overlapped or connected with a fluid flow channel part, and the fluid flow channel is.
In each drawing, 1 is a positive electrode tab, 2 is a negative electrode tab, 3 is a positive electrode terminal, 4 is a negative electrode terminal, 5 is a heat-conducting and heat-collecting body, 6 is a fluid flow passage component, 7 is an electric core, 8 is a heat exchange device, 9 is a metal shell, 10 is a top cover, and 11 is a heat sink flow passage.
As shown in fig. 1, the positive and negative electrode tabs are disposed at the same end, and the heat conduction and heat collection bodies 5 are disposed on the positive and negative electrode tabs and disposed at the opposite ends of the electrode tabs, i.e., the bottom ends of the metal shells 9, the positive electrode tab 1 is electrically connected to the positive electrode terminal 3 disposed on the top cover 10, and the negative electrode tab 1 is electrically connected to the negative electrode terminal 4 disposed on the top cover 10. Fig. 2 is a schematic structural diagram of the battery cell in fig. 1, fig. 3 is a schematic sectional diagram of fig. 2, and the heat-conducting and heat-collecting body 5 and the current collector in fig. 2 and fig. 3 are integrally connected. In fig. 4, a plurality of heat conducting and collecting bodies 5 are connected together to form a heat collecting flow channel 11 for heat conducting and collecting.
As shown in fig. 5, the positive and negative electrode tabs are disposed at the same end, the heat conducting and collecting body 5 is disposed between the positive and negative electrode tabs, the heat conducting and collecting bodies 5 are stacked into a heat collecting channel 11, the fluid channel member 6 is disposed on the heat collecting channel 11, the fluid channel member 6 enters from the middle of the negative electrode terminal 4 and exits from one end of the positive electrode terminal 3, an inlet and outlet hole of the fluid channel member 6 is reserved between the positive electrode terminal 3 and the negative electrode terminal 4, in another aspect, the fluid channel member 6 can enter from the positive electrode terminal 3 and exit from the negative electrode terminal 4, and a heat exchanging device 8 and the fluid channel member 6 are disposed outside the battery case 9 to form a complete energy cycle.
As shown in fig. 6, the positive and negative electrode tabs are disposed at the same end, the heat conducting and collecting body 5 is disposed between the positive and negative electrode tabs, the heat conducting and collecting bodies 5 are stacked to form a heat collecting flow channel 11, the fluid flow channel member 6 is disposed on the heat collecting flow channel 11, the fluid flow channel member 6 enters from one side of the end surface of the top cover 10 and exits from one side of the end surface of the top cover 10, and the heat exchanging device 8 and the fluid flow channel member 6 are disposed outside the battery case to form a complete energy cycle.
As shown in fig. 7, the positive and negative electrode tabs are disposed at the same end, the heat conducting and collecting body 5 is disposed between the positive and negative electrode tabs, and can be disposed on the positive electrode tab, or can be disposed on the negative electrode tab, the heat conducting and collecting bodies 5 are stacked to form a heat collecting flow channel 11, the fluid flow channel member 6 is disposed on the heat collecting flow channel 11, the fluid flow channel member 6 enters and exits from a port reserved on the end surface of the top cover 10, an inlet and an outlet of the fluid flow channel member are disposed on the port, and a heat exchanging device 8 and the fluid flow channel member 6 are disposed outside the battery case to form a complete energy cycle.
As shown in fig. 8, the positive and negative electrode tabs are disposed at the same end, the heat conducting and collecting body 5 is disposed at the opposite end of the positive and negative electrode tabs, and can be disposed on the positive electrode tab or the negative electrode tab, a plurality of heat conducting and collecting bodies 5 are stacked to form a heat sink flow channel 11, the fluid flow channel member 6 is disposed on the heat sink flow channel 11, the fluid flow channel member 6 enters from one side of the bottom surface of the metal casing 9 and exits from the other side of the bottom surface of the metal casing 9, and the heat exchanging device 8 and the fluid flow channel member 6 outside the battery casing form a complete energy cycle.
As shown in fig. 9, the positive and negative electrode tabs are disposed at the same end, the heat conducting and collecting body 5 is disposed at the opposite end of the positive and negative electrode tabs, and may be disposed on the positive electrode tab or the negative electrode tab, the heat conducting and collecting bodies 5 are stacked into a heat sink flow channel 11, the fluid flow channel member 6 is disposed on the heat sink flow channel 11, the fluid flow channel member 6 enters and exits from a port reserved on the bottom surface of the metal casing 9, an inlet and an outlet thereof are disposed at the port, and the heat exchanging device 8 and the fluid flow channel member 6 outside the battery casing form a complete energy cycle.
As shown in fig. 10, the positive and negative electrode tabs are disposed at the same end, the heat conducting and collecting body 5 is disposed between the positive and negative electrode tabs, the heat conducting and collecting body 5 and the negative electrode tabs are connected into a whole, the heat conducting and collecting bodies 5 are stacked into a heat collecting flow channel 11, the fluid flow channel member 6 is disposed on the heat collecting flow channel 11, the fluid flow channel member 6 enters from a tube hole reserved in the middle of the negative electrode terminal 4, and an inlet and outlet tube hole of the fluid flow channel member 6 is reserved in the middle of the positive electrode terminal and the negative electrode terminal; (in another scheme, the heat conduction and collection body 5 is connected with the positive plate to form a whole, and the fluid flow passage component 6 is reserved from the positive terminal 3 for the inlet and outlet pipe holes of the fluid flow passage component 6 to enter and exit), and a heat exchange device 8 and the fluid flow passage component 6 form a complete energy cycle outside the battery shell.
As shown in fig. 11, the positive and negative electrode ears are disposed at the same end, the heat conductive and collecting body 5 is disposed at the side of the battery cell 7, the heat conductive and collecting bodies 5 are stacked to form a heat sink flow channel 11, the fluid flow channel member 6 is disposed on the heat sink flow channel 11, the fluid flow channel member 6 enters and exits from a port reserved on the side of the metal casing 9, and the heat exchange device 8 and the fluid flow channel member 6 are disposed outside the battery casing to form a complete energy cycle.
As shown in fig. 12, the positive and negative electrode ears are disposed at the same end, the heat conducting and collecting body 5 is disposed at the side of the battery cell 7 and is recessed inward to form a pole piece, the heat conducting and collecting bodies 5 are stacked to form a heat collecting flow channel 11, the fluid flow channel member 6 is disposed on the heat collecting flow channel 11, the fluid flow channel member 6 enters and exits from a port reserved on the side surface of the metal casing 9, and the heat exchanging device 8 and the fluid flow channel member 6 are disposed outside the battery casing to form a complete energy cycle.
As shown in fig. 13, the positive and negative electrode ears are disposed at the same end, the heat conductive and collecting body 5 is disposed at the side of the battery cell 7, the heat conductive and collecting bodies 5 are stacked to form a heat sink flow channel 11, the fluid flow channel member 6 is disposed on the heat sink flow channel 11, the inlet of the fluid flow channel member 6 is disposed at the side of the metal casing 9, the outlet of the fluid flow channel member 6 is disposed at different positions on the same side of the metal casing 9, and the heat exchange device 8 and the fluid flow channel member 6 form a complete energy cycle outside the battery casing.
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 intended 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 (5)
1. The lithium ion power battery comprises a battery cell, a metal shell for accommodating the battery cell, electrolyte injected into the metal shell and a top cover fixedly connected to the metal shell; the battery cell comprises a positive plate, a negative plate and a diaphragm which is arranged between the positive plate and the negative plate at intervals, and the battery cell is manufactured by sequentially laminating or winding; the positive plate is provided with a positive electrode tab; the negative plate is provided with a negative electrode tab; the top cover is provided with an anode pole column electrically connected with the anode tab and a cathode pole column electrically connected with the cathode tab; the negative plate comprises a negative current collector and a negative active material layer coated on the negative current collector; the positive plate comprises a positive current collector and a positive active material layer coated on the positive current collector, and is characterized in that the positive plate is 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 the positive active material layer on the front part or/and the back part of the positive current collector, heat conduction and heat collection flow passages are formed by overlapping the heat conduction and heat collection bodies in the same area from top to bottom to form a heat energy inlet and outlet heat collection flow passage of the battery cell, the heat collection flow passages are overlapped or connected with a fluid flow passage component, and the fluid flow passages are exposed from the narrow.
2. the lithium ion power cell of claim 1, wherein the heat sink channel is formed by welding and fixing a heat conductive and collecting body; or the heat collecting flow channel is formed by fixedly bolting or riveting a heat-conducting heat-collecting body; or the heat collection flow channel is formed by 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 part of the heat conduction and collection body which is bent in multiple layers and the 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 bent through holes, meshes, 3D through holes and 3D concave-convex self heat conduction and heat collection bodies; 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 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 the open-faced current collector is parallel to the positive active material layer; or the exposed current collector is a full current collector; or the exposed current collector covers the middle part of the positive active material layer at the same side; or a temperature sensor is arranged on the heat sink flow passage; or the laminates are composite laminates or bagged or fine laminate laminates; or the positive active material is lithium iron phosphate, lithium cobaltate, lithium manganate or a ternary material; or 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.
3. The lithium ion power cell of claim 2, wherein the welding is ultrasonic welding, laser welding, or friction welding; or the included angle between the bent heat conduction and collection body and the positive plate is 0-90 degrees; 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 part of the heat conduction and collection body which is bent in multiple layers is bent in a single direction; or part of the heat conduction and collection body which is bent in multiple layers is bent in the positive and reverse directions; or the protruded heat conduction and collection body extends into the electrolyte in the battery shell; or the temperature sensor is a thin film temperature sensor.
4. The lithium ion power cell of claim 3, wherein the electrolyte has a heat exchanger for heating or cooling the electrolyte.
5. The lithium ion power cell of claim 1, wherein the fluid flow channel member has an inlet and an outlet for fluid; or the inner wall of the fluid flow passage part is provided with an insulating layer or/and the joint of the fluid flow passage is provided with an insulating layer; or the outer surface of the fluid flow passage part is provided with an insulating layer; or the fluid flow passage part is a fluid flow passage pipe fitting or an air conditioner refrigerant pipe fitting or a heat pipe consisting of a pipe shell and a liquid absorption core; or fins may be provided in the fluid flow path member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710503649.9A CN110571435A (en) | 2017-06-28 | 2017-06-28 | Lithium ion power battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710503649.9A CN110571435A (en) | 2017-06-28 | 2017-06-28 | Lithium ion power battery |
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| CN110571435A true CN110571435A (en) | 2019-12-13 |
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| CN201710503649.9A Pending CN110571435A (en) | 2017-06-28 | 2017-06-28 | Lithium ion power battery |
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| CN202076386U (en) * | 2010-12-31 | 2011-12-14 | 比亚迪股份有限公司 | Battery temperature management system and automobile |
| CN103855355A (en) * | 2012-11-30 | 2014-06-11 | 海洋王照明科技股份有限公司 | Power battery pole ears and power battery |
| CN104882635A (en) * | 2015-05-30 | 2015-09-02 | 深圳市格瑞普电池有限公司 | Laminated lithium ion battery, battery pack comprising same and pole piece of laminated lithium ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6451472B1 (en) * | 1999-04-16 | 2002-09-17 | Samsung Sdi Co., Ltd. | Lithium battery and manufacturing method thereof |
| CN202076386U (en) * | 2010-12-31 | 2011-12-14 | 比亚迪股份有限公司 | Battery temperature management system and automobile |
| CN103855355A (en) * | 2012-11-30 | 2014-06-11 | 海洋王照明科技股份有限公司 | Power battery pole ears and power battery |
| CN104882635A (en) * | 2015-05-30 | 2015-09-02 | 深圳市格瑞普电池有限公司 | Laminated lithium ion battery, battery pack comprising same and pole piece of laminated lithium ion battery |
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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: 20191213 |