WO2019001470A1 - 一种锂离子动力电池 - Google Patents

一种锂离子动力电池 Download PDF

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Publication number
WO2019001470A1
WO2019001470A1 PCT/CN2018/093109 CN2018093109W WO2019001470A1 WO 2019001470 A1 WO2019001470 A1 WO 2019001470A1 CN 2018093109 W CN2018093109 W CN 2018093109W WO 2019001470 A1 WO2019001470 A1 WO 2019001470A1
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WIPO (PCT)
Prior art keywords
heat
positive electrode
collector
lithium ion
power battery
Prior art date
Application number
PCT/CN2018/093109
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English (en)
French (fr)
Inventor
邱伯谦
Original Assignee
湖南妙盛汽车电源有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN201710503309.6A external-priority patent/CN109860759A/zh
Priority claimed from CN201710503711.4A external-priority patent/CN109873227A/zh
Application filed by 湖南妙盛汽车电源有限公司 filed Critical 湖南妙盛汽车电源有限公司
Priority to EP18823424.9A priority Critical patent/EP3648238A4/en
Publication of WO2019001470A1 publication Critical patent/WO2019001470A1/zh
Priority to US16/727,649 priority patent/US20200136206A1/en

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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
    • H01M10/654—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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • 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
    • H01M10/6552—Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
    • 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
    • H01M10/6553—Terminals or leads
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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

Definitions

  • the invention relates to a lithium ion battery, in particular to a lithium ion power battery.
  • Lithium-ion batteries have become the best candidates for new energy vehicle power systems because of their high specific energy, no pollution, and no memory effect.
  • lithium-ion batteries are very sensitive to temperature, and the battery pack can discharge efficiently and maintain good performance in a suitable temperature range.
  • the high temperature will make the lithium ion battery aging faster, the thermal resistance increase faster, the cycle times become less, the service life becomes shorter, and even the battery thermal runaway problems are caused; the low temperature will lower the conductivity of the electrolyte and the ability to conduct active ions. Falling, the impedance increases, and the capacity decreases.
  • the prior art either changes the position of the cell to improve the fluid flow path and increase the heat dissipation; or through the improvement of the battery case, such as replacing the shell material from the aluminum alloy to the thermoelectric material and the aluminum
  • the material is compositely prepared, and a plurality of heat dissipating ribs are added to the side of the shell; or the electrode sheet is extended into the electrolyte, and the energy is transmitted to the battery casing through the electrolyte, and then transmitted to the outside of the battery through the battery casing.
  • the prior art can play a certain role of heat dissipation, the heat can not be directly discharged from the pole piece of the main heating part to the outside of the battery, and the heat conduction and heat dissipation effect is poor. Therefore, research on a new type of lithium ion power battery has been urgently needed.
  • the present invention provides a lithium ion power battery, which can effectively solve the problems of excessive or too low battery temperature, achieve temperature control, improve battery life and improve production efficiency.
  • a lithium ion power battery comprising a battery core, a metal housing for accommodating the battery core, an electrolyte injected into the metal housing, and a top cover fixedly coupled to the metal housing;
  • the battery core includes a positive electrode sheet, a negative electrode sheet and a separator interposed between the positive electrode sheet and the negative electrode sheet, sequentially laminated or wound to form a battery core;
  • the positive electrode sheet is provided with a positive electrode tab; and the negative electrode sheet is provided with a negative electrode a pole;
  • the top cover is provided with a positive pole electrically connected to the positive pole, and a negative pole electrically connected to the negative pole;
  • the negative plate comprises a negative current collector and is coated on the negative electrode a negative active material layer on the current collector;
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer coated on the positive electrode current collector, wherein the positive electrode sheet or the negative electrode sheet is provided with a heat conductive heat collector, and the heat conductive heat collector a current collector that
  • the heat-conducting heat-collecting body above the sheet is stacked in the same area to form a heat-collecting heat-sinking channel, and the heat energy constituting the battery core enters and exits the heat-sinking channel, and the heat-sinking channel is superposed or connected with an insulating member, and the heat-sinking channel and the insulating member constitute an insulating heat.
  • Confluence channel components At least The heat-conducting heat-collecting body above the sheet is stacked in the same area to form a heat-collecting heat-sinking channel, and the heat energy constituting the battery core enters and exits the heat-sinking channel, and the heat-sinking channel is superposed or connected with an insulating member, and the heat-sinking channel and the insulating member constitute an insulating heat.
  • the heat-conductive heat collector and the positive electrode sheet are integrally formed, the process is simplified, the production efficiency is improved, and the heat-dissipating heat-collecting body is superposed on the upper and lower areas to form a heat-sinking channel, and the battery can be realized by heating or cooling the heat-sinking channel.
  • the internal temperature rises or falls, and the battery is always maintained at a suitable operating temperature, which improves battery efficiency, extends battery life, and eliminates safety hazards.
  • the heat sink is superimposed or connected with insulating parts to make the heat sink more safe and avoid short circuits.
  • the heat sink is formed by fixing a heat conductive heat collector.
  • the heat-dissipating heat-collecting body is superposed and fixed by welding to form a heat-sinking channel, which not only combines firmly, but also helps to reduce the battery quality and improve the energy density of the battery.
  • the welding is ultrasonic welding, laser welding or friction welding.
  • the heat sink is formed by fixing a heat conducting heat collector by bolting or riveting.
  • the heat-conducting heat-collecting body is superposed by bolting or riveting to form a heat-sink, which does not cause damage to the diaphragm or the like.
  • the heat sink is a plurality of layers of the heat conducting heat collector bent and fixed into one body. In this way, the heat on the heat-conducting collector will be more conducive to concentration on the heat bus, facilitating cooling or heating.
  • the angle between the heat-conductive collector bend and the positive electrode sheet is 0-90°. In this way, the heat on the heat-conducting collector will be more conducive to concentration on the heat bus, facilitating cooling or heating.
  • the heat sink is integrally formed by unidirectional bending of the plurality of heat conductive collectors. In this way, the hot runner is convenient to install and is beneficial for cooling or heating.
  • the hot bus channel is a plurality of layers of the heat conducting heat collector fixed in a forward and reverse bend. In this way, the contact between the heat-dissipating heat collectors is good, and the heat-sinks are favorable for cooling or heating.
  • the heat sink is partially integrated with the plurality of layers of the heat conductive heat collector and is fixed integrally with the flat heat conductive heat collector. In this way, the contact between the heat-conducting heat collectors is good, and the heat-sinks are favorable for cooling.
  • the thermally conductive heat collector that partially bends in multiple layers is a one-way bend. In this way, the process is relatively simple.
  • the thermally conductive heat collector of the partial multi-layer bending is positive and negative bending. In this way, the contact between the heat-dissipating heat collectors is good, and the heat-sinks are favorable for cooling or heating.
  • Part or all of the thermally conductive heat collector is perforated or 3D perforated or 3D relief.
  • the surface area of the heat-conducting heat collector is increased to facilitate cooling or heating.
  • a heat conducting heat collecting member having perforations, meshes, 3D perforations, and 3D concavities and convexities is interposed between the heat conducting heat collectors.
  • the surface area of the heat-conducting heat collector is increased to facilitate cooling or heating.
  • the heat conducting heat collector has a self-heating heat collecting body with a bent perforation, a mesh shape, a 3D perforation, and a 3D unevenness. Thus, the cooling or heating effect of the heat conduction heat collector is good.
  • the surface of the heat conductive collector has an insulating layer, an insulating heat conducting layer or an insulating film. In this way, short-circuiting at the heat-dissipating heat collector can be avoided, and safety hazards can be eliminated.
  • the surface of the heat bus has an insulating layer or an insulating film. In this way, short circuits can be avoided at the heat sink and the safety hazard can be eliminated.
  • the heat sink is located on at least one side of the same side, the opposite side, and the adjacent side of the positive electrode tab. In this way, the location of the hot runner can be set as required.
  • the hot runner has one or two or three on one side of the positive tab. In this way, the number of hot runners can be set according to requirements, and the battery temperature can be better controlled.
  • the heat conductive heat collector protrudes from the positive electrode sheet. In this way, it is advantageous to superimpose between the heat-dissipating heat collectors, which is advantageous for the introduction or/and the introduction of heat.
  • the protruding heat conductive heat collector projects into the electrolyte in the battery casing.
  • the heat of the heat-dissipating heat collector can be introduced into the electrolyte, and the heat is quickly transmitted to the surface of the battery through the electrolyte, thereby avoiding heat transfer in the battery due to poor heat transfer performance of the separator, causing danger; and heat in the electrolyte It can also be quickly introduced into the pole piece through the heat conduction collector to avoid the battery temperature being too low.
  • the electrolyte is heated or cooled by the heat exchange device, and the electrolyte is heated or cooled by the heat transfer collector to maintain the battery temperature within a suitable range.
  • the heat conductive heat collector is recessed in the positive electrode sheet. In this way, it is advantageous to reduce the weight of the battery and increase the energy density of the battery.
  • the heat conducting heat collector has the same width as the joint portion of the positive electrode sheet. Thus, without increasing the weight of the battery, the contact area between the heat-conductive collector and the positive electrode sheet is the largest, and the heat conduction effect is the best.
  • the exposed surface current collector is parallel to the positive active material layer. In this way, the production process is convenient and the production efficiency is high.
  • the exposed surface current collector is a total current collector. In this way, the heat conduction effect is good.
  • the exposed surface current collector covers the middle of the positive active material layer on the same side.
  • a temperature sensor is disposed on the heat sink. In this way, the temperature on the heat sink channel can be accurately monitored to achieve the purpose of controlling the temperature of the heat sink channel.
  • the temperature sensor is a film temperature sensor. In this way, the temperature can be accurately monitored, and the weight is small, which can increase the energy density of the battery.
  • the laminate is a composite laminate or a pocket or a laminate.
  • the positive active material is lithium iron phosphate, lithium cobaltate, lithium manganate or a ternary material.
  • the negative electrode active material is a carbon negative electrode material, a tin-based negative electrode material, a lithium-containing transition metal nitride negative electrode material, or an alloy-based negative electrode material.
  • Embodiment 1 is a schematic structural view of Embodiment 1 of the present invention.
  • Figure 2 is a schematic view showing the structure of the battery core of Figure 1;
  • Figure 3 is a cross-sectional structural view of the cell of Figure 1;
  • FIG. 4 is a schematic cross-sectional structural view of a battery cell
  • Figure 5 is a schematic structural view of Embodiment 5 of the present invention.
  • Figure 6 is a schematic structural view of Embodiment 6 of the present invention.
  • Figure 7 is a schematic structural view of Embodiment 7 of the present invention.
  • Figure 8 is a schematic structural view of Embodiment 8 of the present invention.
  • Figure 9 is a schematic structural view of Embodiment 9 of the present invention.
  • Figure 10 is a schematic structural view of Embodiment 10 of the present invention.
  • Figure 11 is a schematic structural view of Embodiment 11 of the present invention.
  • Figure 12 is a schematic structural view of Embodiment 12 of the present invention.
  • Figure 13 is a schematic view showing the structure of Embodiment 13 of the present invention.
  • a lithium ion power battery comprising a battery core, a metal case for accommodating the battery core, an electrolyte injected into the metal case, and a top fixedly connected to the metal case a cover;
  • the battery core comprises a positive electrode sheet, a negative electrode sheet and a separator spaced between the positive electrode sheet and the negative electrode sheet, sequentially laminated or wound to form a battery core;
  • the positive electrode sheet is provided with a positive electrode tab;
  • the negative electrode sheet is provided with a negative electrode tab;
  • the top cover is provided with a positive pole pole electrically connected to the positive pole tab, and a negative pole pole electrically connected to the negative pole tab;
  • the negative electrode sheet includes a negative pole a current collector and a negative active material layer coated on the negative current collector;
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer coated on the positive electrode current collector, wherein the positive electrode sheet or the negative electrode sheet is provided with a heat conductive heat collector
  • the heat conducting heat collector is
  • Coating negative electrode activity The current collector of the material layer; at least two or more heat-conducting heat-collecting bodies are stacked on the same area to form a heat-collecting heat-sinking channel, and the heat energy constituting the battery core enters and exits the heat-sinking channel, and the heat-sinking channel is superposed or connected with insulating parts, heat
  • the manifold and the insulating member constitute an insulating heat bus assembly.
  • 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 conduction heat collector
  • 6 is a fluid flow path member
  • 7 is a battery core
  • 8 is a heat exchange.
  • the device, 9 is a metal casing
  • 10 is a top cover
  • 11 is a hot runner.
  • the positive and negative electrodes are disposed at the same end, and the positive and negative electrodes are respectively provided with a heat conducting heat collector 5, and are disposed at opposite ends of the tab, that is, the bottom end of the metal casing 9, the positive pole 1 and
  • the positive electrode terminal 3 provided on the top cover 10 is connected by an electrical connection, and the negative electrode tab 1 is connected to the negative electrode terminal 4 provided on the top cover 10 by electrical connection.
  • 2 is a schematic structural view of the battery cell of FIG. 1
  • FIG. 3 is a schematic cross-sectional view of FIG. 2, wherein the heat conducting heat collector 5 of FIG. 2 and FIG. 3 is integrally connected with the current collector.
  • a plurality of heat conducting heat collectors 5 are joined together to form a heat collecting heat collecting passage 11 of heat.
  • the positive and negative electrodes are disposed at the same end, the heat conducting heat collector 5 is disposed between the positive and negative electrodes, and the plurality of heat conducting heat collectors 5 are stacked into the heat collecting channel 11, and the fluid flow path member 6 is disposed at On the heat bus passage 11, the fluid flow path member 6 enters from the middle of the negative electrode terminal 4, exits from one end of the positive electrode terminal 3, and has an inlet and outlet pipe hole of the fluid flow path member 6 in the middle of the positive electrode terminal 3 and the negative electrode terminal 4, and A solution fluid flow path member 6 can also enter from the positive terminal 3, from the negative terminal 4, and a heat exchange device 8 and a fluid flow path member 6 outside the battery case 9 constitute a complete energy cycle.
  • the positive and negative electrodes are disposed at the same end, the heat conduction heat collector 5 is disposed between the positive and negative electrodes, and the plurality of heat conduction heat collectors 5 are stacked to form the heat bus 11 and the fluid flow path member 6 is disposed at On the heat bus passage 11, the fluid flow path member 6 enters from one side of the end surface of the top cover 10, exits from one side of the end surface of the top cover 10, and a heat exchange device 8 and a fluid flow path member 6 form a complete outer portion of the battery case. Energy cycle.
  • the positive and negative electrodes are disposed at the same end, and the heat conductive collector 5 is disposed between the positive and negative electrodes, and may be disposed on the positive electrode or on the negative electrode, and the plurality of thermal heat collectors 5 are stacked.
  • Synthetic hot runner 11 the fluid runner member 6 is disposed on the hot runner 11, the fluid runner member 6 enters and exits from a port reserved at the end face of the cap 10, and its inlet and outlet are disposed at the port outside the battery case
  • the heat exchange unit 8 and the fluid flow path member 6 form a complete energy cycle.
  • the positive and negative electrodes are disposed at the same end, and the heat-dissipating heat collector 5 is disposed at the opposite end of the positive and negative electrodes, and may be disposed on the positive electrode or on the negative electrode, and the plurality of heat-conductive collectors 5
  • the heat flow channel 11 is stacked, the fluid flow path member 6 is disposed on the heat bus passage 11, and the fluid flow path member 6 enters from the bottom surface side of the metal case 9, and exits from the other side of the bottom surface of the metal case 9 at the battery.
  • a heat exchange device 8 and a fluid flow path member 6 on the outside of the housing form a complete energy cycle.
  • the positive and negative electrodes are disposed at the same end, and the heat-dissipating heat collector 5 is disposed at the opposite end of the positive and negative electrodes, and may be disposed on the positive electrode or on the negative electrode, and the plurality of heat-conductive collectors 5
  • the heat flow channel 11 is stacked, the fluid flow path member 6 is disposed on the heat flow channel 11, and the fluid flow path member 6 enters and exits from a port reserved at the bottom surface of the metal case 9, and both the inlet and the outlet are disposed at the port, in the battery
  • a heat exchange device 8 and a fluid flow path member 6 on the outside of the housing form a complete energy cycle.
  • the positive and negative electrodes are disposed at the same end, the heat conducting heat collector 5 is disposed between the positive and negative electrodes, the heat conducting heat collector 5 is connected with the negative electrode sheet, and the plurality of heat conducting heat collectors 5 are stacked.
  • the heat bus passage 11, the fluid flow path member 6 is disposed on the heat bus passage 11, and the fluid flow path member 6 comes in from the pipe hole reserved in the middle of the negative electrode terminal 4, and a fluid flow is reserved between the positive electrode terminal and the negative electrode terminal.
  • the positive and negative electrodes are disposed at the same end, the heat conducting heat collector 5 is disposed at the side of the battery cell 7, and the plurality of heat conducting heat collectors 5 are stacked to form the heat collecting channel 11, and the fluid flow path member 6 is disposed at On the heat bus passage 11, the fluid flow path member 6 enters and exits from a port reserved on the side of the metal casing 9, and a heat exchange device 8 and a fluid flow path member 6 constitute a complete energy cycle outside the battery casing.
  • the positive and negative electrodes are disposed at the same end, the heat conducting heat collector 5 is disposed at the side of the battery core 7, and the concave and the pole pieces are stacked, and the plurality of heat conducting heat collectors 5 are stacked to form the heat collecting channel 11,
  • the fluid flow path member 6 is disposed on the heat bus passage 11, and the fluid flow path member 6 enters and exits from a port reserved on the side of the metal casing 9, and a heat exchange device 8 and a fluid flow path member 6 form a complete body outside the battery case. Energy cycle.
  • the positive and negative electrodes are disposed at the same end, the heat conducting heat collector 5 is disposed at the side of the battery cell 7, and the plurality of heat conducting heat collectors 5 are stacked into the heat collecting channel 11, and the fluid flow path member 6 is disposed at On the heat bus passage 11, the inlet of the fluid flow path member 6 is disposed on the side of the metal casing 9, and the outlet of the fluid flow path member 6 is disposed at different positions on the same side of the metal casing 9, and heat exchange is performed outside the battery casing.
  • the device 8 and the fluid flow path member 6 form a complete energy cycle.

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Abstract

本发明公开了一种锂离子动力电池，包括电芯、金属壳体、电解液和固定连接在所述金属壳体上的顶盖；电芯包括正极片、负极片和隔膜；正极片和负极片上分别设有正极极耳和负极极耳；顶盖上设有正极极柱和负极极柱；其特征在于正极片或者负极片设置有导热集热体，所述导热集热体为正极集流体的正面局部或/和反面局部未涂覆正极活性材料层的集流体，或者所述导热集热体为负极集流体的正面局部或/和反面局部未涂覆负极活性材料层的集流体；至少两片以上导热集热体上下在同一区域叠成导热集热的热汇流道，构成电芯的热能进出热汇流道，热汇流道叠合或连接有绝缘部件，热汇流道与绝缘部件构成绝缘热汇流道组件。本发明能有效解决电池温度过高或过低等问题，达到控温，提高电池寿命和提高生产效率等效果。

Description

一种锂离子动力电池 (一)技术领域
本发明涉及一种锂离子电池，尤其涉及一种锂离子动力电池。
(二)背景技术
交通对能源危机和环境污染带来双重压力，迫切需要大力开发和研究高效、清洁、安全的新能源汽车来实现节能减排。锂离子电池由于具有比能量高、无污染、无记忆效应等优点成为新能源汽车动力系统的最佳候选。但锂离子电池对温度非常敏感，在合适的温度范围内电池组才能高效率放电并保持良好的性能。高温会使锂离子电池老化速度变快、热阻增加变快、循环次数变少、使用寿命变短，甚至引发电池热失控等问题；低温会使得电解液的电导率降低，传导活性离子的能力下降，阻抗增加，容量下降。
现有技术或是通过改变电芯的安放位置，以达到改善流体流道，增加散热的目的；或是通过对电池壳体的改进，如将壳体材料由铝合金更换为由热电材料和铝材料复合制备，将壳体侧面增设多处散热凸沿；或是将电极片延长伸入到电解液中，通过电解液将能量传输至电池外壳，再由电池外壳传输到电池外部等。现有技术虽然可以起到一定的散热作用，但是热量仍旧不能从主要发热部位极片直接导出到电池外部，导热散热效果较差。因此，研究一种新型锂离子动力电池已为急需。
(三)发明内容
针对现有技术的不足，本发明提供一种锂离子动力电池，它能有效解决电池温度过高或过低等问题，达到控温，提高电池寿命和提高生产效率等效果。
本发明的技术方案为：
锂离子动力电池，包括电芯、用于容纳所述电芯的金属壳体、注入到所述金属壳体内的电解液和固定连接在所述金属壳体上的顶盖；所述电芯包括正极片、负极片和间隔于所述正极片和负极片之间的隔膜，按顺序依次叠片或卷绕制成电芯；所述正极片设有正极极耳；所述负极片设有负极极耳；所述顶盖上设有与所述正极极耳电连接的正极极柱、与所述负极极耳电连接的负极极柱；所述的负极片包括负极集流体和涂覆在负极集流体上的负极活性材料层；正极片包括正极集流体和涂覆在正极集流体上的正极活性材料层，其特征在于正极片或负极片设置有导热集热体，所述导热集热体为正极集流体的正面局部或/和反面局部未涂覆正极活性材料层的集流体，或者所述导热集热体为负极集流体的正面局部或/和反面局部未涂覆负极活性材料层的集流体；至少两片以上导热集热体上下在同一区域叠成导热集热的热汇流道，构成电芯的热能进 出热汇流道，热汇流道叠合或连接有绝缘部件，热汇流道与绝缘部件构成绝缘热汇流道组件。这样，导热集热体与正极片一体成型，简化了工序，提高了生产效率，将导热集热体在上下同一区域叠合形成热汇流道，通过对热汇流道加热或冷却，即可实现电池内部温度升高或降低，始终维持电池在合适的工作温度，提高电池工作效率，延长电池寿命，消除安全隐患。热汇流道叠合或连接有绝缘部件，使得热汇流道更安全，避免发生短路。
所述热汇流道是导热集热体通过焊接固定形成。这样，通过焊接的方式将导热集热体叠合固定形成热汇流道，不仅结合牢固，而且有利于降低电池质量，提高电池能量密度。
所述焊接为超声波焊、激光焊或摩擦焊。
所述热汇流道是导热集热体通过栓接或铆接固定形成。这样，通过栓接或铆接的方式叠合固定导热集热体形成热汇流道，不会对隔膜等造成损害。
所述热汇流道为多层所述导热集热体折弯固定成一体。这样，导热集热体上的热量将更有利于集中于热汇流道，有利于冷却或加热。
所述导热集热体折弯与正极片的夹角为0-90°。这样，导热集热体上的热量将更有利于集中于热汇流道，有利于冷却或加热。
所述热汇流道为多层所述导热集热体单向折弯固定成一体。这样，热汇流道既安装比较方便，又有利于冷却或加热。
所述热汇流道为多层所述导热集热体正、反向折弯固定成一体。这样，导热集热体间接触好，热汇流道有利于冷却或加热。
所述热汇流道为部分多层折弯的所述导热集热体与平直的所述导热集热体固定成一体。这样，导热集热体之间接触好，热汇流道有利于冷却。
部分多层折弯的所述导热集热体为单向折弯。这样，工序比较简单。
部分多层折弯的所述导热集热体为正、反向折弯。这样，导热集热体间接触好，热汇流道有利于冷却或加热。
所述导热集热体的部分或全部穿孔或3D穿孔或3D凹凸。这样，导热集热体的表面积增大，更有利于冷却或加热。
所述导热集热体之间夹有穿孔、网状、3D穿孔、3D凹凸的导热集热部件。这样，导热集热体的表面积增大，更有利于冷却或加热。
所述导热集热体之间夹有折弯的穿孔、网状、3D穿孔、3D凹凸的自身导热集热体。这样，导热集热体的冷却或加热效果好。
所述导热集热体表面有绝缘层、绝缘导热层或绝缘膜。这样，可以避免导热集热体处发生短路，消除安全隐患。
所述热汇流道表面有绝缘层或绝缘膜。这样，可以避免热汇流道处发生短路，消除安全隐患。
所述热汇流道位于所述正极极耳的同侧、相对侧和相邻侧的至少一侧。这样，可以根据需求，设置热汇流道的位置。
所述热汇流道在正极极耳的一侧有一个或两个或三个。这样，可以根据需求，设置热汇流道的个数，更好的控制电池温度。
所述导热集热体凸出于正极片。这样，有利于导热集热体之间叠合，有利于热量的导入或/和导出。
凸出的所述导热集热体伸入电池外壳内的电解液中。这样，导热集热体的热量可导入电解液中，热量经电解液迅速传至电池表面，避免因隔膜传热性能不佳，而导致热量在电池内部集聚，引发危险；同时电解液中的热量也可通过导热集热体而迅速的导入极片，避免电池温度过低。
所述电解液中有加热或冷却电解液用热交换器。这样，通过热交换装置对电解液进行加热或冷却，电解液再对导热集热体进行加热或冷却，而使电池温度维持在合适的范围内。
所述导热集热体凹陷于正极片。这样，有利于减小电池重量，提高电池能量密度。
所述导热集热体与正极片相连部位同宽。这样，在不增加电池重量的情况下，导热集热体和正极片连接部位接触面积最大，导热效果最好。
所述露面集流体平行于正极活性材料层。这样，生产工艺方便，生产效率高。
所述露面集流体为全集流体。这样，导热效果好。
所述露面集流体为同侧覆盖正极活性材料层中部。
所述热汇流道上设置有温度传感器。这样，可准确监控热汇流道上的温度，达到控制热汇流道温度的目的。
所述温度传感器为薄膜温度传感器。这样，既可以准确监控温度，又具有重量小等特点，可提高电池的能量密度。
所述叠片为复合叠片或袋装或细片叠片。
所述正极活性材料为磷酸铁锂、钴酸锂、锰酸锂或三元材料。
所述负极活性材料为碳负极材料、锡基负极材料、含锂过渡金属氮化物负极材料或合金类负极材料。
(四)附图说明
图1是本发明实施例1的结构示意图；
图2是图1中的电芯结构示意图；
图3是图1中电芯的剖面结构示意图；
图4是电芯的剖面结构示意图；
图5是本发明实施例5的结构示意图；
图6是本发明实施例6的结构示意图；
图7是本发明实施例7的结构示意图；
图8是本发明实施例8的结构示意图；
图9是本发明实施例9的结构示意图；
图10是本发明实施例10的结构示意图
图11是本发明实施例11的结构示意图；
图12是本发明实施例12的结构示意图；
图13是本发明实施例13的结构示意图。
(五)具体实施方式
下面结合附图对本发明作进一步详细说明。
本发明的技术方案为：锂离子动力电池，包括电芯、用于容纳所述电芯的金属壳体、注入到所述金属壳体内的电解液和固定连接在所述金属壳体上的顶盖；所述电芯包括正极片、负极片和间隔于所述正极片和负极片之间的隔膜，按顺序依次叠片或卷绕制成电芯；所述正极片设有正极极耳；所述负极片设有负极极耳；所述顶盖上设有与所述正极极耳电连接的正极极柱、与所述负极极耳电连接的负极极柱；所述的负极片包括负极集流体和涂覆在负极集流体上的负极活性材料层；正极片包括正极集流体和涂覆在正极集流体上的正极活性材料层，其特征在于正极片或负极片设置有导热集热体，所述导热集热体为正极集流体的正面局部或/和反面局部未涂覆正极活性材料层的集流体，或者所述导热集热体为负极集流体的正面局部或/和反面局部未涂覆负极活性材料层的集流体；至少两片以上导热集热体上下在同一区域叠成导热集热的热汇流道，构成电芯的热能进出热汇流道，热汇流道叠合或连接有绝缘部件，热汇流道与绝缘部件构成绝缘热汇流道组件。
各附图中，1为正极极耳，2为负极极耳，3为正极端子，4为负极端子，5为导热集热体，6为流体流道部件，7为电芯，8为热交换装置，9为金属壳体，10顶盖，11为热汇流道。
如图1中，正负极耳设置在同一端，正负极片上均设置有导热集热体5，且设置在极耳的相对端，即金属壳体9的底端，正极极耳1与顶盖10上设置的正极端子3通过电连接连接，负极极耳1与顶盖10上设置的负极端子4通过电连接连接。图2为图1中电芯的结构示意图，图3为图2的剖面示意图，图2、图3中导热集热体5与集流体连接成整体。图4中多个导热集热体5连接在一起，形成导热集热的热汇流道11。
如图5所示，正负极耳设置在同一端，导热集热体5设置在正负极片之间，多个导 热集热体5叠合成热汇流道11，流体流道部件6设置在热汇流道11上，流体流道部件6从负极端子4的中间进入，从正极端子3一端出来，在正极端子3与负极端子4的中间预留有流体流道部件6的进出管孔，另一方案流体流道部件6还可以从正极端子3进入，从负极端子4出来，在电池壳体9外面有热交换装置8与流体流道部件6构成一个完整的能量循环。
如图6所示，正负极耳设置在同一端，导热集热体5设置在正负极片之间，多个导热集热体5叠合成热汇流道11，流体流道部件6设置在热汇流道11上，流体流道部件6从顶盖10端面的一侧进入，从顶盖10端面的一侧出来，在电池壳体外面有热交换装置8与流体流道部件6构成一个完整的能量循环。
如图7所示，正负极耳设置在同一端，导热集热体5设置在正负极片之间，可以设置在正极片上，也可以设置在负极片上，多个导热集热体5叠合成热汇流道11，流体流道部件6设置在热汇流道11上，流体流道部件6从顶盖10端面预留的端口进出，其进口和出口均设置在该端口，在电池壳体外面有热交换装置8与流体流道部件6构成一个完整的能量循环。
如图8所示，正负极耳设置在同一端，导热集热体5设置在正负极耳的相对端，可以设置在正极片上，也可以设置在负极片上，多个导热集热体5叠合成热汇流道11，流体流道部件6设置在热汇流道11上，流体流道部件6从金属壳体9的底面一侧进入，从金属壳体9底面的另一侧出来，在电池壳体外面有热交换装置8与流体流道部件6构成一个完整的能量循环。
如图9所示，正负极耳设置在同一端，导热集热体5设置在正负极耳的相对端，可以设置在正极片上，也可以设置在负极片上，多个导热集热体5叠合成热汇流道11，流体流道部件6设置在热汇流道11上，流体流道部件6从金属壳体9的底面预留的端口进出，其进口和出口均设置在该端口，在电池壳体外面有热交换装置8与流体流道部件6构成一个完整的能量循环。
如图10所示，正负极耳设置在同一端，导热集热体5设置在正负极片之间，导热集热体5与负极片连接成整体，多个导热集热体5叠合成热汇流道11，流体流道部件6设置在热汇流道11上，流体流道部件6从负极端子4的中间预留的管孔中进来，在正极端子与负极端子的中间预留有流体流道部件6的进出管孔；(另一方案中导热集热体5与正极片连接成整体，案流体流道部件6从正极端子3预留流体流道部件6的进出管孔进出)，在电池壳体外面有热交换装置8与流体流道部件6构成一个完整的能量循环。
如图11所示，正负极耳设置在同一端，导热集热体5设置在电芯7的侧边，多个导热集热体5叠合成热汇流道11，流体流道部件6设置在热汇流道11上，流体流道部件6从金属壳体9的侧面预留的端口进出，在电池壳体外面有热交换装置8与流体流道 部件6构成一个完整的能量循环。
如图12所示，正负极耳设置在同一端，导热集热体5设置在电芯7的侧边，并且内凹与极片，多个导热集热体5叠合成热汇流道11，流体流道部件6设置在热汇流道11上，流体流道部件6从金属壳体9的侧面预留的端口进出，在电池壳体外面有热交换装置8与流体流道部件6构成一个完整的能量循环。
如图13所示，正负极耳设置在同一端，导热集热体5设置在电芯7的侧边，多个导热集热体5叠合成热汇流道11，流体流道部件6设置在热汇流道11上，流体流道部件6的入口设置在金属壳体9的侧面，流体流道部件6的出口设置在金属壳体9的同侧面的不同位置，在电池壳体外面有热交换装置8与流体流道部件6构成一个完整的能量循环。
上述内容为本发明的具体实施例的例举，对于其中未详尽描述的设备和结构，应当理解为采取本领域已有的通用设备及通用方法来予以实施。
同时本发明上述实施例仅为说明本发明技术方案之用，仅为本发明技术方案的列举，并不用于限制本发明的技术方案及其保护范围。采用等同技术手段、等同设备等对本发明权利要求书及说明书所公开的技术方案的改进应当认为是没有超出本发明权利要求书及说明书所公开的范围。

Claims (20)

  1. 锂离子动力电池，包括电芯、用于容纳所述电芯的金属壳体、注入到所述金属壳体内的电解液和固定连接在所述金属壳体上的顶盖；所述电芯包括正极片、负极片和间隔于所述正极片和负极片之间的隔膜，按顺序依次叠片或卷绕制成电芯；所述正极片设有正极极耳，所述负极片设有负极极耳；所述顶盖上设有与所述正极极耳电连接的正极极柱、与所述负极极耳电连接的负极极柱；所述的负极片包括负极集流体和涂覆在负极集流体上的负极活性材料层；正极片包括正极集流体和涂覆在正极集流体上的正极活性材料层，其特征在于正极片或者负极片设置有导热集热体，所述导热集热体为正极集流体的正面局部或/和反面局部未涂覆正极活性材料层的集流体，或者所述导热集热体为负极集流体的正面局部或/和反面局部未涂覆负极活性材料层的集流体；至少两片以上导热集热体上下在同一区域叠成导热集热的热汇流道，构成电芯的热能进出热汇流道，热汇流道叠合或连接有绝缘部件，热汇流道与绝缘部件构成绝缘热汇流道组件。
  2. 如权利要求1所述的锂离子动力电池，其特征在于所述热汇流道是导热集热体通过焊接固定形成。
  3. 如权利要求2所述的锂离子动力电池，其特征在于所述焊接为超声波焊、激光焊或摩擦焊。
  4. 如权利要求1所述的锂离子动力电池，其特征在于所述热汇流道是导热集热体通过栓接或铆接固定形成。
  5. 如权利要求1至4中任一权利要求所述的锂离子动力电池，其特征在于所述热汇流道为多层所述导热集热体折弯固定成一体。
  6. 如权利要求5所述的锂离子动力电池，其特征在于所述导热集热体折弯与正极片的夹角为0‐90°；或者所述热汇流道为多层所述导热集热体单向折弯固定成一体。
  7. 如权利要求6所述的锂离子动力电池，其特征在于所述热汇流道为多层所述导热集热体正、反向折弯固定成一体。
  8. 如权利要求1至4中任一权利要求所述的锂离子动力电池，其特征在于所述热汇流道为部分多层折弯的所述导热集热体与平直的所述导热集热体固定成一体。
  9. 如权利要求8所述的锂离子动力电池，其特征在于部分多层折弯的所述导热集热体为单向折弯；或者部分多层折弯的所述导热集热体为正、反向折弯。
  10. 如权利要求1至4中任一权利要求所述的锂离子动力电池，其特征在于导热集热体的部分或全部穿孔或3D穿孔或3D凹凸；或者导热集热体之间夹有穿孔、网状、3D穿孔、3D凹凸的导热集热部件；或者导热集热体之间夹有折弯的穿孔、网状、3D穿孔、3D凹凸的自身导热集热体。
  11. 如权利要求1至4中任一权利要求所述的锂离子动力电池，其特征在于导热集热体表面有绝缘层、绝缘导热层或绝缘膜；或者所述热汇流道表面有绝缘层或绝缘膜。
  12. 如权利要求1至4中任一权利要求所述的锂离子动力电池，其特征在于所述热汇流道位于所述正极极耳的同侧、相对侧和相邻侧的至少一侧。
  13. 如权利要求1至4中任一权利要求所述的锂离子动力电池，其特征在于所述热汇流道在正极极耳的一侧有一个或两个或三个。
  14. 如权利要求1至4中任一权利要求所述的锂离子动力电池，其特征在于导热集热体凸出于正极片。
  15. 如权利要求14所述的锂离子动力电池，其特征在于凸出的所述导热集热体伸入电池外壳内的电解液中。
  16. 如权利要求15所述的锂离子动力电池，其特征在于所述电解液中有加热或冷却电解液用热交换器。
  17. 如权利要求1至4中任一权利要求所述的锂离子动力电池，其特征在于导热集热体凹陷于正极片；或者导热集热体与正极片相连部位同宽。
  18. 如权利要求1至4中任一权利要求所述的锂离子动力电池，其特征在于露面集流体为同侧覆盖正极活性材料层中部。
  19. 如权利要求1至4中任一权利要求所述的锂离子动力电池，其特征在于所述热汇流道上设置有温度传感器。
  20. 如权利要求1至4中任一权利要求所述的锂离子动力电池，其特征在于所述叠片为复合叠片或袋装或细片叠片。
PCT/CN2018/093109 2017-06-28 2018-06-27 一种锂离子动力电池 WO2019001470A1 (zh)

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