CN114709361A - Lithium ion battery and manufacturing method thereof - Google Patents

Lithium ion battery and manufacturing method thereof Download PDF

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Publication number
CN114709361A
CN114709361A CN202110680175.1A CN202110680175A CN114709361A CN 114709361 A CN114709361 A CN 114709361A CN 202110680175 A CN202110680175 A CN 202110680175A CN 114709361 A CN114709361 A CN 114709361A
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China
Prior art keywords
temperature sensor
current collector
lithium ion
thermocouple
ion battery
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Pending
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CN202110680175.1A
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Inventor
刘泽召
陈明明
李魁豪
刘止善
夏兰
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Ningbo University
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Ningbo University
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Priority to CN202110680175.1A priority Critical patent/CN114709361A/en
Publication of CN114709361A publication Critical patent/CN114709361A/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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • 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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

The application discloses lithium ion battery includes: the battery comprises a current collector, a lead-out wire, a battery shell with a lead-out hole, a temperature sensor coated on the upper surface of the current collector and a wiring terminal; the temperature sensor comprises an anode thermocouple and a cathode thermocouple, the anode thermocouple and the cathode thermocouple are respectively connected with the wiring terminal, one end of the outgoing line is connected with the wiring terminal, and the other end of the outgoing line is located on the outer side of the outgoing hole. Temperature sensor is located the upper surface of the mass flow body, and temperature sensor is located lithium ion battery's inside promptly, can promote the measuring result of battery temperature to, coating at the upper surface of the mass flow body during temperature sensor, it is stronger with the adhesion of the mass flow body, be difficult for receiving the influence of the inside adverse temperature environment of lithium ion battery and drop, the difficult emergence in position changes, reduces the probability that the deviation appears in the temperature. In addition, the application also provides a manufacturing method of the lithium ion battery with the advantages.

Description

Lithium ion battery and manufacturing method thereof
Technical Field
The present disclosure relates to lithium ion batteries, and particularly to a lithium ion battery and a method for manufacturing the same.
Background
The lithium ion battery is a secondary battery (rechargeable battery) which mainly depends on the movement of lithium ions between a positive electrode and a negative electrode to work and has the advantages of large specific energy, long cycle life, small self-discharge and the like.
Thermal runaway of lithium ion batteries can cause ignition and even explosion of the batteries, and therefore the thermal runaway of the lithium ion batteries becomes a current hot point problem. At present, when carrying out temperature monitoring to lithium ion battery, mainly utilize temperature sensor to arrange at lithium ion battery's lateral wall or near come the measuring temperature, but, because the difference of battery inside and outside temperature is great, temperature measurement result is inaccurate, causes the battery cooling untimely to appear thermal runaway easily.
Therefore, how to solve the above technical problems should be a great concern to those skilled in the art.
Disclosure of Invention
The application aims to provide a lithium ion battery and a manufacturing method thereof so as to improve the temperature measurement accuracy of the lithium ion battery.
In order to solve the above technical problem, the present application provides a lithium ion battery, including:
the battery comprises a current collector, an outgoing line, a battery shell with an outgoing hole, a temperature sensor coated on the upper surface of the current collector and a terminal;
the temperature sensor comprises an anode thermocouple and a cathode thermocouple, the anode thermocouple and the cathode thermocouple are respectively connected with the wiring terminal, one end of the outgoing line is connected with the wiring terminal, and the other end of the outgoing line is located on the outer side of the outgoing hole.
Optionally, the current collector includes a positive current collector and a negative current collector, and the temperature sensor is coated on the positive current collector or the negative current collector.
Optionally, the method further includes:
an insulating layer between the current collector and the temperature sensor.
Optionally, the temperature sensor is a thin film type temperature sensor.
Optionally, the temperature sensor is any one of the following:
platinum-rhodium 10-platinum S-type thermocouples, platinum-rhodium 13-platinum R-type thermocouples, platinum-rhodium 30-platinum-rhodium 6B-type thermocouples, nickel-chromium-nickel-silicon K-type thermocouples, nickel-chromium-silicon-nickel-silicon N-type thermocouples, nickel-chromium-copper-nickel E-type thermocouples, iron-copper-nickel J-type thermocouples and copper-nickel T-type thermocouples.
Optionally, the method further includes:
and the protective layer is positioned on the upper surface of the temperature sensor.
Optionally, when the upper surface area of the temperature sensor is smaller than the upper surface area of the current collector, the protective layer is located in an area where the upper surface of the temperature sensor and the upper surface of the current collector are not covered.
The application also provides a manufacturing method of the lithium ion battery, which comprises the following steps:
obtaining a current collector and a battery case with a lead-out hole;
depositing a positive thermocouple and a negative thermocouple on the upper surface of the current collector to form a temperature sensor;
depositing a terminal connected with the positive thermocouple and the negative thermocouple on the upper surface of the current collector;
and connecting one end of the outgoing line with the wiring terminal, and extending the other end of the outgoing line out of the outgoing hole of the battery shell to obtain the lithium ion battery.
Optionally, before depositing the positive thermocouple and the negative thermocouple on the upper surface of the current collector to form the temperature sensor, the method further includes:
depositing an insulating layer on the upper surface of the current collector;
correspondingly, depositing a positive thermocouple and a negative thermocouple on the upper surface of the current collector to form the temperature sensor comprises:
and depositing the positive thermocouple and the negative thermocouple on the upper surface of the insulating layer to form the temperature sensor.
Optionally, after depositing terminals connected to the positive thermocouple and the negative thermocouple on the upper surface of the current collector, the method further includes:
and depositing a protective layer on the upper surface of the temperature sensor.
The application provides a lithium ion battery, includes: the battery comprises a current collector, a lead-out wire, a battery shell with a lead-out hole, a temperature sensor coated on the upper surface of the current collector and a wiring terminal; the temperature sensor comprises an anode thermocouple and a cathode thermocouple, the anode thermocouple and the cathode thermocouple are respectively connected with the wiring terminal, one end of the outgoing line is connected with the wiring terminal, and the other end of the outgoing line is located on the outer side of the outgoing hole.
It is thus clear that lithium ion battery in this application includes the mass flow body, the lead-out wire, temperature sensor, the wiring end, temperature sensor is connected to the wiring end, connect the lead-out wire simultaneously, the lead-out wire spreads the temperature signal that temperature sensor measures outside the battery through the wiring end, temperature sensor is located the upper surface of the mass flow body, temperature sensor is located lithium ion battery's inside promptly, can promote the measuring result of battery temperature, and, the coating is on the upper surface of the mass flow body during temperature sensor, it is stronger with the adhesion of the mass flow body, be difficult for receiving the influence of the inside abominable temperature environment of lithium ion battery and drop, the position is difficult for taking place to change, reduce the probability that the deviation appears in the temperature.
In addition, the application also provides a manufacturing method of the lithium ion battery with the advantages.
Drawings
For a clearer explanation of the embodiments or technical solutions of the prior art of the present application, the drawings needed for the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic partial structure diagram of a lithium ion battery provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a positional relationship among a separator, a positive electrode, and a negative electrode in a lithium ion battery provided in an embodiment of the present application;
fig. 3 is a schematic diagram of an electrode and a lead-out hole in a lithium ion battery provided in an embodiment of the present application;
fig. 4 is a schematic cross-sectional view of a lithium ion battery provided in an embodiment of the present application;
fig. 5 is a schematic cross-sectional view of another lithium ion battery provided in an embodiment of the present application;
fig. 6 is a flowchart of a method for manufacturing a lithium ion battery according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As described in the background section, currently, when monitoring the temperature of a lithium ion battery, a temperature sensor is mainly arranged on a side wall of the lithium ion battery or near the side wall to measure the temperature, but because the difference between the internal temperature and the external temperature of the battery is large, the temperature measurement result is not accurate, and the battery is prone to being cooled down untimely and thermal runaway occurs.
In view of this, the present application provides a lithium ion battery, please refer to fig. 1, fig. 1 is a schematic diagram of a partial structure of the lithium ion battery provided in an embodiment of the present application, including:
the battery comprises a current collector 1, an outgoing line 2, a battery shell with an outgoing hole 8, a temperature sensor 3 coated on the upper surface of the current collector 1 and a terminal 4;
the temperature sensor 3 comprises an anode thermocouple and a cathode thermocouple, the anode thermocouple and the cathode thermocouple are respectively connected with the wiring terminal 4, one end of the outgoing line 2 is connected with the wiring terminal 4, and the other end of the outgoing line 2 is located on the outer side of the outgoing hole 8.
It should be noted that the positive thermocouple is connected to one terminal 4, the negative thermocouple is connected to one terminal 4, and one terminal 4 is connected to one outgoing line 2. The other end of the outgoing line 2 can be connected with a temperature acquisition module, the connection part of the wiring end 4 and the outgoing line 2 is coated with conductive adhesive to fix the outgoing line 2, and the outgoing line 2 is coated with epoxy resin.
In order to improve the accuracy of the temperature signal output of the temperature sensor 3, the material of the outgoing line 2 is the same as that of the connected terminal 4.
The lithium ion battery in the application also comprises a positive electrode 7, a negative electrode 5, a diaphragm 6, an electrode 9 and the like, wherein the diaphragm 6 is positioned between the positive electrode 7 and the negative electrode 5, as shown in fig. 2, the schematic diagram of the electrode 9 and a lead-out hole 8 is shown in fig. 3, and the electrode 9 is used for leading out a circuit.
It should be noted that the kind of thermocouple in the temperature sensor 3 is not particularly limited in the present application. The specific type is determined according to the battery capacity and the requirements of the use environment. For example, the temperature sensor 3 is any one of:
platinum-rhodium 10-platinum S-type thermocouples, platinum-rhodium 13-platinum R-type thermocouples, platinum-rhodium 30-platinum-rhodium 6B-type thermocouples, nickel-chromium-nickel-silicon K-type thermocouples, nickel-chromium-silicon-nickel-silicon N-type thermocouples, nickel-chromium-copper-nickel E-type thermocouples, iron-copper-nickel J-type thermocouples and copper-nickel T-type thermocouples.
The current collector 1 functions to collect current, and the current collector 1 includes a positive electrode current collector and a negative electrode current collector. The position of the temperature sensor 3 is not specifically limited in the present application, and can be set by itself. For example, the temperature sensor 3 is coated on the upper surfaces of the positive and negative electrode current collectors, or the temperature sensor 3 is coated on the positive or negative electrode current collector. When the temperature sensor 3 is coated on the positive current collector or the negative current collector, only two wiring terminals 4 and two outgoing lines 2 are needed, the structure is simple, and the manufacturing cost can be saved.
Lithium ion battery in this application includes the mass flow body 1, lead-out wire 2, temperature sensor 3, wiring end 4, temperature sensor 3 is connected to wiring end 4, connect lead-out wire 2 simultaneously, the temperature signal that lead-out wire 2 measured temperature sensor 3 through wiring end 4 spreads the battery outside, temperature sensor 3 is located the upper surface of mass flow body 1, temperature sensor 3 is located lithium ion battery's inside promptly, can promote the measuring result of battery temperature, and, the coating is on the upper surface of mass flow body 1 during temperature sensor 3, it is stronger with the adhesion of mass flow body 1, be difficult for receiving the influence of the inside adverse temperature environment of lithium ion battery and drop, the position is difficult for taking place to change, reduce the probability that the deviation appears in the temperature.
On the basis of the above-described embodiment, in one embodiment of the present application, the temperature sensor 3 is a thin film type temperature sensor.
The thickness of film type temperature sensor compares and reduces greatly in traditional temperature sensor 3, and is small, and is less to the interference of test temperature field, can further promote temperature measurement's accuracy to film type temperature sensor's response time is very fast, and response time is several milliseconds, can satisfy the demand of battery temperature control.
The thickness of the thin film type temperature sensor is between 50 um-500 um, including end point values such as 80um, 150um, 200um, 260um, 300um, 400um, 430um, 480um, etc., to reduce the influence on the battery volume.
In order to avoid the adverse effect of the current in the current collector 1 on the temperature sensor 3 and prolong the service life of the temperature sensor 3, referring to fig. 4, the cross-sectional schematic diagram of the lithium ion battery of this embodiment further includes:
an insulating layer 10 located between said current collector 1 and said temperature sensor 3.
The material of the insulating layer 10 includes, but is not limited to, tantalum pentoxide (Ta)2O5) Silicon oxide (SiO)2) Silicon nitride (Si)3N4) Alumina (Al)2O3) Aluminum nitride (AlN), polyimide, polyethylene, polyvinylidene fluoride, polytetrafluoroethylene.
The thickness of the insulating layer 10 is not particularly limited in this application and may be set by itself. For example, the insulating layer 10 has a thickness of between 100nm and 300nm, inclusive, such as 130nm, 190nm, 250nm, 270nm, 285nm, and the like. The thickness of the insulating layer 10 is prevented from being too thin, so that the temperature sensor 3 is not protected enough, and meanwhile, the thickness of the insulating layer 10 is prevented from being too thick, so that the volume of the lithium ion battery is prevented from being too large.
On the basis of any one of the above embodiments, in an embodiment of the present application, the lithium ion battery further includes:
and the protective layer 11 positioned on the upper surface of the temperature sensor 3 avoids the adverse effect of the complex environment inside the battery on the temperature sensor 3, and prolongs the service life of the temperature sensor 3.
The material of the protective layer 11 includes, but is not limited to, aluminum oxide (Al)2O3) Silicon oxide (SiO)2) Silicon nitride (Si)3N4) Alumina (Al)2O3) Aluminum nitride (AlN). The material of the insulating layer is also suitable for the protective layer, since both layers need to be resistant to high temperatures and insulating.
The thickness of the protective layer 11 is not particularly limited in this application and may be set by itself. For example, the thickness of the protection layer 11 is between 1um and 5um, including end points such as 1.2um, 1.5um, 3um, 3.6um, 4.2um, 4.5um, 4.8um, etc. The thickness of the protective layer 11 is prevented from being too thin, the protective effect on the temperature sensor 3 is too weak, even the protective effect cannot be achieved, and meanwhile, the thickness of the temperature sensor 3 is prevented from being too thick, so that the volume of the lithium ion battery is too large.
When the area of the upper surface of the temperature sensor 3 is smaller than the area of the upper surface of the current collector 1, the protective layer 11 is located in the uncovered areas of the upper surfaces of the temperature sensor 3 and the current collector 1, and the schematic cross-sectional view of the lithium ion battery provided in the embodiment of the present application is shown in fig. 5.
When the upper surface area of the temperature sensor 3 is equal to the upper surface area of the current collector 1, the protective layer 11 is located on the upper surface of the temperature sensor 3.
Referring to fig. 6, fig. 6 is a flowchart of a method for manufacturing a lithium ion battery according to an embodiment of the present application, where the method includes:
step S101: a current collector and a battery case having a lead-out hole are obtained.
The current collector may be a precision polished current collector.
Step S102: and depositing a positive thermocouple and a negative thermocouple on the upper surface of the current collector to form the temperature sensor.
The methods for depositing the positive thermocouple and the negative thermocouple include, but are not limited to, ion beam sputtering deposition technology, magnetron sputtering coating technology, chemical vapor deposition technology, and high vacuum electron beam evaporation coating technology.
Step S103: and depositing a terminal connected with the positive thermocouple and the negative thermocouple on the upper surface of the current collector.
The wiring terminals are deposited by means including, but not limited to, ion beam sputter deposition techniques, magnetron sputter coating techniques, chemical vapor deposition techniques, and high vacuum electron beam evaporation coating techniques.
Step S104: and connecting one end of an outgoing line with the wiring terminal, and extending the other end of the outgoing line out of the outgoing hole of the battery shell to obtain the lithium ion battery.
And coating conductive adhesive at the position where the terminal is connected with the outgoing line, and then fixedly connecting the outgoing line on the terminal.
Lithium ion battery that lithium ion battery preparation method made in this application includes the mass flow body, the lead-out wire, temperature sensor, the wiring end, temperature sensor is connected to the wiring end, connect the lead-out wire simultaneously, the lead-out wire spreads the temperature signal that temperature sensor measures outside the battery through the wiring end, temperature sensor is located the upper surface of the mass flow body, temperature sensor is located lithium ion battery's inside promptly, can promote the measuring result of battery temperature, and, the coating is on the upper surface of the mass flow body during temperature sensor, it is stronger with the adhesion of the mass flow body, be difficult for receiving the influence of the inside adverse temperature environment of lithium ion battery and drop, the position is difficult for changing, reduce the probability that the deviation appears in the temperature.
In order to simplify the manufacturing process and reduce the manufacturing cost, in an embodiment of the present application, depositing a positive thermocouple and a negative thermocouple on the upper surface of the current collector, and forming the temperature sensor includes:
and depositing a positive thermocouple and a negative thermocouple on the upper surface of the positive current collector or the negative current collector to form the temperature sensor.
On the basis of the above embodiments, in an embodiment of the present application, before depositing a positive thermocouple and a negative thermocouple on an upper surface of the current collector to form a temperature sensor, the method further includes:
depositing an insulating layer on the upper surface of the current collector;
correspondingly, depositing a positive thermocouple and a negative thermocouple on the upper surface of the current collector to form the temperature sensor comprises:
and depositing the positive thermocouple and the negative thermocouple on the upper surface of the insulating layer to form the temperature sensor.
Before the positive thermocouple and the negative thermocouple are deposited on the upper surface of the insulating layer, photoetching can be performed on positions, corresponding to the positive thermocouple and the negative thermocouple, on the insulating layer, so that friction force between the positive thermocouple and the insulating layer and friction force between the negative thermocouple and the insulating layer are increased, the positive thermocouple and the negative thermocouple are not easy to transfer, and the measurement accuracy is improved.
The insulating layer is deposited by ion beam sputtering deposition, magnetron sputtering, chemical vapor deposition, and high vacuum electron beam evaporation.
The insulating layer is deposited, so that the adverse effect of the current in the current collector on the temperature sensor can be avoided, and the service life of the temperature sensor is prolonged.
On the basis of any one of the above embodiments, in an embodiment of the present application, after depositing terminals connected to the positive thermocouple and the negative thermocouple on the upper surface of the current collector, the method further includes:
and depositing a protective layer on the upper surface of the temperature sensor.
The protective layer is deposited by ion beam sputtering deposition, magnetron sputtering, chemical vapor deposition, and high vacuum electron beam evaporation.
The deposition of the protective layer can avoid the adverse effect of the complex environment in the battery on the temperature sensor, and prolong the service life of the temperature sensor.
When the upper surface area of temperature sensor is less than the upper surface area of the mass flow body, include at the upper surface deposition protective layer of temperature sensor:
depositing a protective layer on the uncovered areas of the upper surface of the temperature sensor and the upper surface of the current collector.
The following explains the method for manufacturing the lithium ion battery in the present application in a specific case.
Step 1, obtaining a current collector and a battery shell with a lead-out hole;
step 2, depositing Ta on the positive current collector by an ion beam sputtering deposition technology2O5An insulating layer;
step 3, depositing on Ta by ion beam sputtering2O5Depositing a positive thermocouple and a negative thermocouple on the insulating layer to form a film type temperature sensor;
step 4, forming terminals on the positive thermocouple and the negative thermocouple by an ion beam sputtering deposition technology;
step 5, connecting one end of the outgoing line with the wiring terminal;
step 6, forming a protective layer on the uncovered areas of the film type temperature sensor and the positive current collector by an ion beam sputtering deposition technology;
and 7, extending the other end of the outgoing line out of the outgoing hole of the battery shell to obtain the lithium ion battery.
In the present specification, the embodiments are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same or similar parts between the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The lithium ion battery and the manufacturing method thereof provided by the present application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims (10)

1. A lithium ion battery, comprising:
the battery comprises a current collector, a lead-out wire, a battery shell with a lead-out hole, a temperature sensor coated on the upper surface of the current collector and a wiring terminal;
the temperature sensor comprises an anode thermocouple and a cathode thermocouple, the anode thermocouple and the cathode thermocouple are respectively connected with the wiring terminal, one end of the outgoing line is connected with the wiring terminal, and the other end of the outgoing line is located on the outer side of the outgoing hole.
2. The lithium ion battery of claim 1, wherein the current collectors comprise a positive current collector and a negative current collector, and the temperature sensor is coated on the positive current collector or the negative current collector.
3. The lithium ion battery of claim 1, further comprising:
an insulating layer between the current collector and the temperature sensor.
4. The lithium ion battery of claim 1, wherein the temperature sensor is a thin film type temperature sensor.
5. The lithium ion battery of claim 1, wherein the temperature sensor is any one of:
platinum-rhodium 10-platinum S-type thermocouples, platinum-rhodium 13-platinum R-type thermocouples, platinum-rhodium 30-platinum-rhodium 6B-type thermocouples, nickel-chromium-nickel-silicon K-type thermocouples, nickel-chromium-silicon-nickel-silicon N-type thermocouples, nickel-chromium-copper-nickel E-type thermocouples, iron-copper-nickel J-type thermocouples and copper-nickel T-type thermocouples.
6. The lithium ion battery of any of claims 1 to 5, further comprising:
and the protective layer is positioned on the upper surface of the temperature sensor.
7. The lithium ion battery of claim 6, wherein the protective layer is located in an area where an upper surface of the temperature sensor and an upper surface of the current collector are uncovered when an upper surface area of the temperature sensor is less than an upper surface area of the current collector.
8. A method for manufacturing a lithium ion battery is characterized by comprising the following steps:
obtaining a current collector and a battery case with a lead-out hole;
depositing a positive thermocouple and a negative thermocouple on the upper surface of the current collector to form a temperature sensor;
depositing a terminal connected with the positive thermocouple and the negative thermocouple on the upper surface of the current collector;
and connecting one end of the outgoing line with the wiring terminal, and extending the other end of the outgoing line out of the outgoing hole of the battery shell to obtain the lithium ion battery.
9. The lithium ion battery of claim 8, wherein before depositing the positive and negative thermocouples on the upper surface of the current collector to form the temperature sensor, further comprising:
depositing an insulating layer on the upper surface of the current collector;
correspondingly, depositing a positive thermocouple and a negative thermocouple on the upper surface of the current collector to form the temperature sensor comprises:
and depositing the positive thermocouple and the negative thermocouple on the upper surface of the insulating layer to form the temperature sensor.
10. The lithium ion battery of claim 8 or 9, further comprising, after depositing terminals connected to the positive and negative thermocouples on the upper surface of the current collector:
and depositing a protective layer on the upper surface of the temperature sensor.
CN202110680175.1A 2021-06-18 2021-06-18 Lithium ion battery and manufacturing method thereof Pending CN114709361A (en)

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CN112054207A (en) * 2020-09-30 2020-12-08 电子科技大学 Battery current collector integrating temperature sensing function and battery device thereof

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Publication number Priority date Publication date Assignee Title
CN207868299U (en) * 2017-10-11 2018-09-14 北京卫蓝新能源科技有限公司 A kind of battery with temperature sensor
CN109065961A (en) * 2018-08-09 2018-12-21 北京理工大学 A kind of production method that multipoint mode internal temperature monitors integrated electrochemical cell
CN112054207A (en) * 2020-09-30 2020-12-08 电子科技大学 Battery current collector integrating temperature sensing function and battery device thereof

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