CN111540849A - Low-temperature-resistant lithium ion battery - Google Patents
Low-temperature-resistant lithium ion battery Download PDFInfo
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- CN111540849A CN111540849A CN202010430785.1A CN202010430785A CN111540849A CN 111540849 A CN111540849 A CN 111540849A CN 202010430785 A CN202010430785 A CN 202010430785A CN 111540849 A CN111540849 A CN 111540849A
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- lithium ion
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 34
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 39
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000012528 membrane Substances 0.000 claims abstract description 5
- 239000004065 semiconductor Substances 0.000 claims description 38
- 238000005485 electric heating Methods 0.000 claims description 17
- 239000003792 electrolyte Substances 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 11
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 239000011888 foil Substances 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 9
- 238000004904 shortening Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000006698 induction Effects 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000003574 free electron Substances 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 239000005955 Ferric phosphate Substances 0.000 description 2
- 239000005030 aluminium foil Substances 0.000 description 2
- 239000010405 anode material Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 229940032958 ferric phosphate Drugs 0.000 description 2
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 2
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000005676 thermoelectric effect Effects 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 ethylene carbonate ester Chemical class 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- 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
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to 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
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6572—Peltier elements or thermoelectric devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a low temperature resistant lithium ion battery, which comprises: lithium cell main part, just lithium cell main part includes the battery protection cover box, the battery protection cover box sets up to the rectangle structure, and the junction box lid, its setting is in the top of battery protection cover box, and with the battery protection cover box passes through the draw-in groove to be connected, the bottom of junction box lid is provided with the recess, and the size of a dimension of recess with the planar dimension of battery protection cover box is the same, and the electrode discharge groove, its setting is in the inside of battery protection cover box, and the electrode discharge groove has five, be side by side between the electrode discharge groove and arrange, the inside of electrode discharge groove is provided with the positive pole module of discharging, one side of positive pole module of discharging is provided with the ionic membrane, and the opposite side of ionic membrane is provided with the negative pole. The lithium battery charging and discharging device has the advantages that when the lithium battery can be charged and discharged at a low temperature, the problems of battery efficiency reduction and battery service life shortening caused by low temperature influence are solved.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a low-temperature-resistant lithium ion battery.
Background
A "lithium battery" is a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a negative electrode material. Lithium metal batteries were first proposed and studied by Gilbert n.lewis in 1912. In the 70 s of the 20 th century, m.s.whitetingham proposed and began to study lithium ion batteries. Because the chemical characteristics of lithium metal are very active, the requirements on the environment for processing, storing and using the lithium metal are very high. With the development of scientific technology, lithium batteries have become mainstream, and the lithium batteries can be roughly divided into two types: lithium metal batteries and lithium ion batteries. Lithium ion batteries do not contain lithium in the metallic state and are rechargeable. The fifth generation of rechargeable batteries, lithium metal batteries, was born in 1996, and the safety, specific capacity, self-discharge rate and cost performance of rechargeable batteries were all superior to those of lithium ion batteries. Due to its own high technical requirement limits, only a few countries of companies are producing such lithium metal batteries.
In the low-temperature charging process of the existing lithium battery, particularly during low-temperature high-rate charging, lithium metal is separated out and deposited on the negative electrode, deposited metal lithium is easy to react with electrolyte irreversibly to consume a large amount of electrolyte, the thickness of the diaphragm is further increased, the impedance of the surface film of the negative electrode of the lithium battery is further increased, the polarization of the battery is enhanced again, and the low-temperature performance, the cycle life and the safety performance of the lithium battery can be damaged greatly.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
It is still another object of the present invention to provide a low temperature resistant lithium ion battery that does not suffer from the problem of reduced battery efficiency and shortened battery life due to low temperature when the lithium ion battery can be used for charging and discharging at low temperature.
In order to achieve the above objects and other objects, the present invention adopts the following technical solutions:
a low temperature resistant lithium ion battery comprising:
the lithium battery comprises a lithium battery main body and a lithium battery protection cover box, wherein the lithium battery main body comprises a battery protection cover box which is arranged in a rectangular structure;
the bottom of the junction box cover is provided with a groove, and the size of the groove is the same as the plane size of the battery protection sleeve box;
and the five electrode discharge grooves are arranged in the battery protection sleeve box, and the electrode discharge grooves are arranged in parallel.
Preferably, the electrode discharge groove is internally provided with a positive electrode discharge module, one side of the positive electrode discharge module is provided with an ion diaphragm, and the other side of the ion diaphragm is provided with a negative electrode discharge module.
Preferably, the anodal module of discharging includes lithium iron phosphate and conductive coating, and conductive coating is including covering the carbon aluminium foil, the negative pole module of discharging includes graphite, and graphite sets up to honeycomb formula structure, the inside of electrode discharge groove is provided with electrolyte and lithium ion, and electrolyte includes ethylene carbonate ester, propylene carbonate and diethyl carbonate.
Preferably, an insulating heat-conducting partition plate is arranged between the electrode discharge grooves and fixedly connected with the battery protection sleeve box, an electric heating piece is arranged inside the insulating heat-conducting partition plate, and power supply terminals are arranged at two ends of the electric heating piece.
Preferably, a temperature sensing control assembly is arranged on the outer side of the battery protection sleeve box and is connected with the battery protection sleeve box through screws, and the temperature sensing control assembly comprises an AD7418ARZ temperature sensor and a data processing module.
Preferably, the battery protection cover box includes the heat conduction shell, and the heat conduction shell passes through the draw-in groove with the temperature difference response chip and is connected, the inside of heat conduction shell is provided with the temperature difference response chip, and the temperature difference response chip and temperature sensing control assembly electric connection.
Preferably, the temperature difference induction chip comprises a heat source semiconductor and a cold source semiconductor, the heat source semiconductor and the cold source semiconductor are arranged in a staggered mode, insulating base plates are arranged on two sides of the heat source semiconductor and two sides of the cold source semiconductor, and the insulating base plates are connected with the heat source semiconductor and the cold source semiconductor in an attached mode.
Preferably, be provided with the lid termination all around of junction box lid, and the lid termination passes through the internal thread rotation with the junction box lid and is connected, the surface of junction box lid is provided with the power groove, the inside in power groove is provided with anodal wiring mouth, and one side of anodal wiring mouth is provided with negative pole wiring mouth.
The invention at least comprises the following beneficial effects:
1. the temperature difference induction chip of the invention is bridged on the electric heating sheet in the insulating heat-conducting clapboard through the temperature sensing control component, the heat source semiconductor is positioned at the inner side of the chip and is close to the electrode discharge groove, the cold source semiconductor is positioned at the outer side of the chip and is close to the outside air, the lithium battery can generate certain heat when in use or charging, when the battery is in low-temperature environment, if the mean free path rises along with the temperature, the free electrons of the heat source semiconductor have higher chance to move to the cold source semiconductor, the Seebeck coefficient is negative, if the mean free path of the electrons falls along with the temperature rise, the free electrons at the cold end have higher chance to flow to the heat source semiconductor, the Seebeck coefficient is positive, electric energy can be generated in the process, and then the electric energy is transmitted to the electric heating sheet through a circuit, so that the electric heating sheet can generate heat, thereby offsetting the influence of the external temperature on the lithium battery.
2. The insulating heat-conducting partition plate has the advantages that the insulating heat-conducting partition plate plays a role in blocking, a group of electric heating pieces are arranged inside each group of insulating heat-conducting partition plates, the electric heating pieces are connected with the temperature sensing control assembly outside the battery shell, and certain heat can be released after the electric heating pieces are powered on, so that electrolyte inside the electrode discharge groove is heated, and the temperature of the electrolyte is maintained between normal charging temperatures.
3. Through dividing into five groups of electrode discharge grooves with the inside of battery protection cover box, the inside of every electrode discharge groove all is provided with anodal discharge module, ionic membrane and negative pole discharge module, forms an independent lithium cell structure, and the inside structure of every electrode discharge groove can all carry out solitary operation moreover to the output and the input efficiency of control battery, when charging, can charge to the positive negative pole of five groups of electrode discharge groove insides in proper order, reasonable application electric energy reaches most effective charge efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a low temperature resistant lithium ion battery provided by the present invention;
FIG. 2 is a schematic view of an exploded structure of a low temperature resistant lithium ion battery provided by the present invention;
FIG. 3 is a schematic structural diagram of an insulating and heat-conducting separator for a low temperature resistant lithium ion battery provided by the present invention;
fig. 4 is a schematic structural diagram of a lithium ion battery protection kit for resisting low temperature provided by the present invention;
fig. 5 is an enlarged schematic structural diagram of the low temperature resistant lithium ion battery a provided by the present invention.
Detailed Description
The present invention is described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description.
As shown in fig. 1 to 5, the low temperature resistant lithium ion battery includes:
the lithium battery comprises a lithium battery main body 1, wherein the lithium battery main body 1 comprises a battery protection sleeve box 2, and the battery protection sleeve box 2 is arranged in a rectangular structure;
the junction box cover 4 is arranged above the battery protection box 2 and is connected with the battery protection box 2 through a clamping groove, a groove is arranged at the bottom of the junction box cover 4, and the size of the groove is the same as the plane size of the battery protection box 2;
and the battery protection sleeve 2 is arranged in the battery protection sleeve 2, five electrode discharge grooves 9 are formed, and the electrode discharge grooves 2 are arranged in parallel.
In the above scheme, the positive and negative electrodes of the lithium battery are arranged in the battery protection sleeve box, the battery protection sleeve box can provide protection for the positive and negative electrodes, and the battery protection sleeve box is internally provided with the group of thermoelectric generation modules, so that the influence of external low temperature on the internal battery can be reduced.
In a preferred embodiment, a positive electrode discharge module 11 is disposed inside the electrode discharge tank 9, an ion diaphragm 12 is disposed on one side of the positive electrode discharge module 11, and a negative electrode discharge module 13 is disposed on the other side of the ion diaphragm 12.
In the above scheme, the inside of the battery protection sleeve box is divided into five groups of electrode discharge grooves, the inside of each electrode discharge groove is provided with the anode discharge module, the ion diaphragm and the cathode discharge module, so that an independent lithium battery structure is formed, and the structure inside each electrode discharge groove can be operated independently, so that the output and input efficiency of the battery is controlled.
In a preferred scheme, anodal discharge module 11 includes lithium iron phosphate and conductive coating, and conductive coating is including covering the carbon aluminium foil, and negative pole discharge module 13 includes graphite, and graphite sets up to honeycomb structure, and the inside of electrode discharge groove 9 is provided with electrolyte and lithium ion, and electrolyte includes ethylene carbonate, propylene carbonate and diethyl carbonate.
In the scheme, the material body is subjected to bulk phase doping by Mn, Al, Cr, Mg, F and other elements, the interlayer spacing of the material is increased to improve the diffusion rate of Li + in the body and reduce the diffusion impedance of Li +, so that the low-temperature performance of the battery is improved, the phase transition from a lithium iron phosphate phase to a lithium iron phosphate phase in the charging process of the lithium iron phosphate battery positive electrode material is slower than the phase transition from a ferric phosphate phase to the lithium iron phosphate phase in the discharging process, the Cr doping can promote the phase transition from the ferric phosphate phase to the lithium iron phosphate phase in the discharging process, so that the multiplying power performance and the low-temperature performance of LiFePO4 are improved, the negative electrode discharging module is of a honeycomb graphite structure, the honeycomb structural design can improve the absorption and embedding of lithium ions, so that the charging efficiency under the low-temperature condition is ensured, when in operation, the lithium ions are embedded in the layered structure of the positive electrode material before charging and after the charging, when the lithium ion battery is used, the lithium ion battery starts to discharge, the electrons flow to the anode through the external circuit, the lithium ions losing the electrons are also extracted from the graphite layers, the lithium ions extracted from the cathode return to the anode material through the electrolyte and the diaphragm again, and the electrons reaching the anode through the external circuit are combined to form the relatively stable lithium-embedded anode material.
In a preferred scheme, an insulating heat-conducting partition plate 10 is arranged between the electrode discharge grooves 9, the insulating heat-conducting partition plate 10 is fixedly connected with the battery protection sleeve box 2, an electric heating piece 14 is arranged inside the insulating heat-conducting partition plate 10, and power supply terminals 15 are arranged at two ends of the electric heating piece 14.
In the above scheme, insulating heat conduction baffle is located between two sets of adjacent electrode discharge cells, insulating heat conduction baffle adopts the insulating material that the heat conductivity is good to make, play the effect of separation through insulating heat conduction baffle, all be provided with a set of electric heating plate in the inside of the insulating heat conduction baffle of every group simultaneously, the electric heating plate is connected with the temperature sensing control assembly in the battery case outside, can release certain heat after the circular telegram, thereby heat the inside electrolyte of electrode discharge cell, make the electrolyte temperature maintain at the temperature interval of normal charge.
In a preferable scheme, a temperature-sensing control component 3 is arranged on the outer side of the battery protection sleeve 2, the temperature-sensing control component 3 is connected with the battery protection sleeve 2 through screws, and the temperature-sensing control component 3 comprises an AD7418ARZ temperature sensor and a data processing module.
In the scheme, the temperature-sensing control assembly positioned outside the battery protection sleeve box can detect the internal temperature of the battery and the external temperature, and when two groups of temperature values reach the specified threshold values, corresponding heat preservation measures can be started, so that the normal operation of the battery is guaranteed.
In a preferred scheme, battery protection box 2 includes heat conduction shell 16, and heat conduction shell 16 passes through the draw-in groove with temperature difference sensing chip 17 and is connected, and the inside of heat conduction shell 16 is provided with temperature difference sensing chip 17, and temperature difference sensing chip 17 and temperature sensing control assembly 3 electric connection.
In the above scheme, the side plates around the battery protection sleeve box are of a hollow structure, a group of temperature difference induction chips are mounted inside each side plate, the temperature difference induction chips can generate a thermoelectric effect in a low-temperature state, the thermoelectric effect is direct conversion of voltage generated by temperature difference, and vice versa, when two groups of semiconductors have temperature difference, a voltage can be generated, when a voltage is applied to one semiconductor, the other semiconductor can generate a temperature difference, and electrons in the semiconductor can be transferred after the temperature difference occurs, so that electric energy is generated.
In a preferred scheme, the temperature difference sensing chip 17 comprises a heat source semiconductor 19 and a heat source semiconductor 20, the heat source semiconductor 19 and the heat source semiconductor 20 are arranged in a staggered manner, insulating pads 18 are arranged on two sides of the heat source semiconductor 19 and two sides of the heat source semiconductor 20, and the insulating pads 18 are attached to the heat source semiconductor 19 and the heat source semiconductor 20.
In the scheme, the temperature difference induction chip is bridged on the electric heating sheet in the insulating heat conduction partition plate through the temperature sensing control assembly, the heat source semiconductor is positioned on the inner side of the chip and is close to the electrode discharge groove, the cold source semiconductor is positioned on the outer side of the chip and is close to the outside air, the lithium battery can generate certain heat when in use or charging, when the battery operates in a low-temperature environment, if the mean free path rises along with the temperature, the free electrons of the heat source semiconductor have higher chance to move to the cold source semiconductor, the Seebeck coefficient is a negative value at the moment, if the mean free path of the electrons falls along with the temperature rise, the free electrons at the cold end have higher chance to flow to the heat source semiconductor, the Seebeck coefficient is a positive value, electric energy can be generated in the process, and then is transmitted to the electric heating sheet through a circuit, so that the electric heating sheet can generate heat, thereby offsetting the influence of the external temperature on the lithium battery.
In a preferred scheme, a box cover sealing end 5 is arranged on the periphery of a junction box cover 4, the box cover sealing end 5 is rotatably connected with the junction box cover 4 through internal threads, a power supply groove 6 is formed in the outer surface of the junction box cover 4, an anode wiring port 7 is arranged inside the power supply groove 6, and a cathode wiring port 8 is arranged on one side of the anode wiring port 7.
In the above scheme, the positive wiring port and the negative wiring port are in a parallel structure, and the adjacent positive wiring port and the adjacent negative wiring port can be connected with the positive module and the negative module in the same group of electrode discharge grooves.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (8)
1. A low temperature resistant lithium ion battery, comprising:
the lithium battery comprises a lithium battery main body and a lithium battery protection cover box, wherein the lithium battery main body comprises a battery protection cover box which is arranged in a rectangular structure;
the bottom of the junction box cover is provided with a groove, and the size of the groove is the same as the plane size of the battery protection sleeve box;
and the five electrode discharge grooves are arranged in the battery protection sleeve box, and the electrode discharge grooves are arranged in parallel.
2. The low temperature resistant lithium ion battery according to claim 1, wherein a positive electrode discharge module is disposed inside the electrode discharge cell, an ionic membrane is disposed on one side of the positive electrode discharge module, and a negative electrode discharge module is disposed on the other side of the ionic membrane.
3. The low temperature resistant lithium ion battery of claim 2, wherein the positive electrode discharge module comprises lithium iron phosphate and a conductive coating, the conductive coating comprises a carbon-coated aluminum foil, the negative electrode discharge module comprises graphite, the graphite is arranged in a honeycomb structure, an electrolyte and lithium ions are arranged inside the electrode discharge groove, and the electrolyte comprises ethylene carbonate, propylene carbonate and diethyl carbonate.
4. The low temperature resistant lithium ion battery according to claim 2, wherein an insulating heat conducting partition plate is disposed between the electrode discharge grooves and is fixedly connected to the battery protection sleeve, an electric heating plate is disposed inside the insulating heat conducting partition plate, and power terminals are disposed at both ends of the electric heating plate.
5. The low temperature resistant lithium ion battery of claim 1, wherein a temperature sensing control component is arranged on the outer side of the battery protection sleeve, and the temperature sensing control component is connected with the battery protection sleeve through screws, and the temperature sensing control component comprises an AD7418ARZ temperature sensor and a data processing module.
6. The low temperature resistant lithium ion battery of claim 1, wherein the battery protection kit comprises a heat conducting shell, the heat conducting shell is connected with the temperature difference sensing chip through a clamping groove, the temperature difference sensing chip is arranged inside the heat conducting shell, and the temperature difference sensing chip is electrically connected with the temperature sensing control component.
7. The low temperature resistant lithium ion battery of claim 6, wherein the temperature difference sensing chip comprises a heat source semiconductor and a cold source semiconductor, the heat source semiconductor and the cold source semiconductor are arranged in a staggered manner, insulating padding plates are arranged on two sides of the heat source semiconductor and two sides of the cold source semiconductor, and the insulating padding plates are attached to the heat source semiconductor and the cold source semiconductor.
8. The low temperature resistant lithium ion battery of claim 1, wherein a box cover end cover is arranged around the junction box cover and is rotatably connected with the junction box cover through an internal thread, a power supply groove is arranged on the outer surface of the junction box cover, a positive wiring port is arranged inside the power supply groove, and a negative wiring port is arranged on one side of the positive wiring port.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010430785.1A CN111540849A (en) | 2020-05-20 | 2020-05-20 | Low-temperature-resistant lithium ion battery |
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| CN202010430785.1A CN111540849A (en) | 2020-05-20 | 2020-05-20 | Low-temperature-resistant lithium ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024212448A1 (en) * | 2023-04-13 | 2024-10-17 | 赵乐亮 | Automatic protection device for storage battery at low-temperature |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100143795A1 (en) * | 2006-10-02 | 2010-06-10 | Kenneth Michael Partington | Battery and a Process for Making a Battery |
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