CN114006082A - Lithium battery temperature control device - Google Patents
Lithium battery temperature control device Download PDFInfo
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- CN114006082A CN114006082A CN202111280327.5A CN202111280327A CN114006082A CN 114006082 A CN114006082 A CN 114006082A CN 202111280327 A CN202111280327 A CN 202111280327A CN 114006082 A CN114006082 A CN 114006082A
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- lithium battery
- cooling
- induction coil
- cooling medium
- temperature control
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 81
- 230000006698 induction Effects 0.000 claims abstract description 71
- 239000002826 coolant Substances 0.000 claims abstract description 45
- 238000001816 cooling Methods 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 239000000498 cooling water Substances 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 2
- 230000032258 transport Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000010405 anode material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
Images
Classifications
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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
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
-
- 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
-
- 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
Abstract
The invention discloses a temperature control device of a lithium battery, wherein the lithium battery comprises at least one electric core, a hollow induction coil is wound on the outer surface of the lithium battery to generate an alternating magnetic field which enables the interior of the lithium battery to excite eddy current and generate heat, the hollow induction coil comprises an inlet wiring end and an outlet wiring end, and the output end of an induction heating circuit is respectively connected with the inlet wiring end and the outlet wiring end to convert direct current into frequency-adjustable high-frequency alternating current to provide alternating current for the hollow induction coil; the cooling pipeline comprises a cooling medium inlet and a cooling medium outlet which are respectively connected with two ends of the hollow induction coil, the cooling pipeline transports cooling medium to the interior of the hollow induction coil through the cooling medium inlet and discharges the cooling medium through the cooling medium outlet, the cooling water tank is connected with the cooling pipeline to provide cooling medium, and the cooling water tank, the cooling pipeline and the hollow induction coil form a circulating cooling loop of the cooling medium.
Description
Technical Field
The invention relates to the technical field of temperature control of lithium batteries, in particular to a temperature control device for a lithium battery.
Background
Lithium ion batteries are currently an important power source. The working performance of the lithium battery is greatly influenced by the temperature, and the optimal working temperature range is limited (25-40 ℃). Specifically, the diffusion rate of lithium ions in most electrode materials is reduced sharply in a low-temperature environment, so that the low-temperature performance of the lithium battery is seriously degraded, lithium is seriously separated from the surface of a negative electrode material at low temperature, the separated metal lithium and electrolyte generate a new SEI (solid electrolyte interface) film, the resistance of the lithium ion in the process of intercalation and deintercalation is greatly increased, and the performance is further deteriorated; high temperature can destroy the chemical balance inside the battery, the side reaction rate is greatly increased, and the cycle life of the battery is greatly shortened. Therefore, how to rapidly heat up the battery in a low-temperature environment and effectively dissipate heat in a high-temperature environment is the key to ensure the optimal performance of the lithium battery in the full-temperature range.
At present, aiming at a wide temperature range heat management method and device of a battery, the battery is preheated mainly by arranging an electric heating sheet or a heat exchange device on the surface of the battery at low temperature, and heat exchange is carried out by direct or indirect contact of cooling media such as air, water and the like with the surface of the battery at high temperature, so that the aim of dissipating heat of the battery is fulfilled. Like patent ZL201520696479.7 a lithium cell of area cooling and device that generates heat, through attaching the electricity generate heat piece on lithium cell cladding group surface and carry out preheating of group battery under the low temperature, realize the heat dissipation of group battery under the high temperature through radiator fan and hydrologic cycle. For another example, patent ZL201710809905.7 discloses a lithium battery preheating and heat dissipating system using two-phase flow power type separated heat pipes, which uses a micro-channel heat pipe heat exchanger and a phase change heat reservoir to achieve heat input into the battery and heat output to the outside. According to the battery preheating and heat dissipation method and device, heat is required to be led in from the outside of the battery in the preheating process, high energy loss is caused due to the fact that large contact thermal resistance exists in a heat exchange interface between the battery and a heating medium, the temperature uniformity of the battery is poor due to overheating of the heating interface, and the temperature rise rate of the battery is low; the heat dissipation process requires too many and complicated devices, and the system cost and weight are greatly increased. Therefore, it is urgently needed to develop a battery wide temperature range temperature control technology with simple structure and high efficiency.
The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is well known to those of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a temperature control device of a lithium battery, which can heat and cool the battery with high efficiency and energy conservation.
In order to achieve the above purpose, the invention provides the following technical scheme:
the lithium battery temperature control device of the invention comprises,
a lithium battery, comprising at least one cell,
a hollow induction coil wound around an outer surface of the lithium battery to generate an alternating magnetic field that excites eddy currents and generates heat inside the lithium battery, the hollow induction coil including an inlet terminal and an outlet terminal,
the output end of the induction heating circuit is respectively connected with the inlet terminal and the outlet terminal so as to convert the direct current into high-frequency alternating current with adjustable frequency and provide the alternating current for the hollow induction coil;
a DC power supply connected to the induction heating circuit to supply DC power,
a cooling pipe including a cooling medium inlet and a cooling medium outlet respectively connected to both ends of the hollow induction coil, the cooling pipe transporting a cooling medium to the inside of the hollow induction coil via the cooling medium inlet and discharging via the cooling medium outlet,
and the cooling water tank is connected with the cooling pipeline to provide a cooling medium, and the cooling water tank, the cooling pipeline and the hollow induction coil form a circulating cooling loop of the cooling medium.
In the lithium battery temperature control device, the circulating cooling loop comprises a pump.
In the lithium battery temperature control device, the pump is arranged in the cooling pipeline.
The lithium battery temperature control device comprises a cylindrical lithium battery, a square lithium battery and a soft package lithium battery.
In the lithium battery temperature control device, the hollow induction coil comprises an enameled copper pipe or a hollow seamless copper pipe.
In the lithium battery temperature control device, the hollow induction coil is disc-shaped or spiral.
In the lithium battery temperature control device, the cooling medium in the hollow induction coil effectively dissipates heat of the battery through heat conduction and heat convection.
In the lithium battery temperature control device, the induction heating coil is tightly attached to the surface of the battery or enwraps the surface of the lithium battery in a winding manner.
In the above technical scheme, the lithium battery temperature control device provided by the invention has the following beneficial effects: the temperature control device for the lithium battery greatly reduces the phenomenon of overheating of a heating interface caused by interface contact thermal resistance, heating energy directly enters the battery, the temperature of the battery is more uniform, the heating efficiency is higher, the hollow induction coil can rapidly and uniformly cool through a circulating cooling medium, and the temperature can be accurately controlled and adjusted according to the requirement.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic diagram of a lithium battery temperature control device;
fig. 2 is a schematic diagram of a lithium battery and a hollow induction coil connection according to an embodiment of a lithium battery temperature control device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to fig. 1 to 2 of the drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
In one embodiment, as shown in fig. 1 to 2, a lithium battery temperature control apparatus includes,
a lithium battery 3, comprising at least one cell,
a hollow induction coil 4 wound around an outer surface of the lithium battery 3 to generate an alternating magnetic field that excites eddy currents and generates heat inside the lithium battery 3, the hollow induction coil 4 including an inlet terminal 9 and an outlet terminal 11,
an induction heating circuit 2, the output end of which is respectively connected with the inlet terminal 9 and the outlet terminal 11 to convert the direct current into a high-frequency alternating current with adjustable frequency and provide the alternating current for the hollow induction coil 4;
a DC power supply 1 connected to the induction heating circuit 2 to supply DC power,
a cooling pipe 6 which comprises a cooling medium inlet 8 and a cooling medium outlet 10 respectively connected with two ends of the hollow induction coil 4, wherein the cooling pipe 6 conveys the cooling medium to the inside of the hollow induction coil 4 through the cooling medium inlet 8 and discharges the cooling medium through the cooling medium outlet 10,
and a cooling water tank 5 connected to the cooling pipe 6 to supply a cooling medium, wherein the cooling water tank 5, the cooling pipe 6 and the hollow induction coil 4 constitute a circulating cooling loop of the cooling medium.
The invention can give consideration to the battery temperature control in low temperature environment and high temperature environment, and in the low temperature environment, the invention utilizes the principle of electromagnetic induction heating, and the magnetic induction coil on the surface of the battery is electrified with high-frequency alternating current, and the battery generates alternating current (namely eddy current) in an alternating magnetic field and generates heat, so that the lithium battery 3 can rapidly heat and raise the temperature in the low temperature environment; under high temperature environment or the high rate charge-discharge operating mode of battery, derive the inside heat of battery through the inside coolant of hollow coil, reduce battery temperature for lithium cell 3 self temperature maintains in best operating temperature scope.
In the preferred embodiment of the lithium battery temperature control device, the circulating cooling loop comprises a pump 7.
In the preferred embodiment of the lithium battery temperature control device, the pump 7 is arranged in the cooling pipeline 6.
In the preferred embodiment of the lithium battery temperature control device, the lithium battery 3 includes a cylindrical lithium battery 3, a square lithium battery 3 and a soft package lithium battery 3.
In the preferred embodiment of the temperature control device for lithium battery, the positive electrode material of the lithium battery 3 includes lithium cobaltate, lithium iron phosphate, lithium manganate and ternary material.
In a preferred embodiment of the temperature control device for a lithium battery, the hollow induction coil 4 includes an enameled copper tube or a hollow seamless copper tube.
In a preferred embodiment of the lithium battery temperature control device, the hollow induction coil 4 is disc-shaped or spiral.
In a preferred embodiment of the lithium battery temperature control device, in an environment of 0 ℃, the induction heating power P of the hollow induction coil 4 is:
where B is the magnetic field strength of the induction heating, D is the diameter of the hollow induction coil 4, f is the predetermined frequency, ρ is the material resistivity, and D is the material density. And calculating appropriate alternating current frequency, corresponding magnetic field alternating frequency and geometric parameters of the induction coil through design, calculating corresponding induction heating power according to the formula, and determining corresponding battery temperature rise rate to enable the temperature rise rate to be in a controllable range.
In a preferred embodiment of the lithium battery temperature control device, the cooling medium in the hollow induction coil 4 effectively dissipates heat of the battery through heat conduction and heat convection.
In the preferred embodiment of the lithium battery temperature control device, the induction heating coil is tightly attached to the surface of the battery or enwraps the surface of the lithium battery 3.
In one embodiment, the lithium battery temperature control device further comprises a power adjusting unit for adjusting the power of the induction heating circuit 2 or the direct current power supply 1.
In one embodiment, the lithium battery temperature control device further comprises a flow rate adjusting device for adjusting the flow rate of the circulating cooling loop.
In one embodiment, the flow rate regulating device is connected to a pump 7.
In one embodiment, the lithium battery temperature control device further comprises a processor connected with the power regulating unit and the flow rate regulating device.
In one embodiment, the hollow magnetic induction coil structure is designed according to the shape of a battery cell, and a disc-shaped coil, a spiral coil and a Helmholtz coil can be mainly adopted, so that good fit with the surface of the battery is ensured to ensure a heat exchange effect; theoretically calculating physical parameters of internal materials and structures of the battery to obtain design and operation parameters of the magnetic induction heating module, wherein the design and operation parameters mainly comprise output power, a coil structure, the number of turns and working time; the specific design and operating parameters of the internal cooling circuit are determined by the amount of heat generated by the battery itself. Compared with the existing wide-temperature-range heat management technology, the invention greatly improves the problem of interface overheating caused by interface contact thermal resistance in the existing external heating method, heat is generated and uniformly distributed in the battery, so that the integral temperature uniformity of the battery is improved, the heating efficiency is higher, and meanwhile, the good heat dissipation effect can be ensured under the working conditions of high-temperature or high-rate charge and discharge of the battery.
Set up hollow induction coil 4 on the battery surface, thereby let in high frequency alternating current and produce alternating magnetic field in the coil through induction heating circuit 2, and then at the inside electric current that produces the alternation of battery (being the vortex), the heat effect and the hysteresis loss of vortex make the battery produce a large amount of heats in the short time, realize preheating of battery. The coolant in the water tank 5 is introduced into the hollow induction coil 4 through the cooling pipeline 6 to form a circulation loop, the coolant contacts with the surface of the battery through the induction coil and takes away the heat inside the battery mainly through heat conduction and heat convection, and the heat dissipation of the battery is realized.
The battery can represent a single battery cell or a combination of a plurality of battery cells, and the battery cells can adopt a cylindrical lithium battery 3, a square lithium battery 3 and a soft package lithium battery 3. The anode material of the battery comprises lithium cobaltate, lithium iron phosphate, lithium manganate and a ternary material.
The induction heating circuit 2 is mainly composed of a capacitor, a high-speed switching tube, a field effect tube, a diode and other components, and the introduced direct current passes through two high-speed switching tubes in the induction heating circuit 2 in a single period under the action of alternate switching on of the high-speed switching tubes, so that the direct current is converted into high-frequency alternating current and an alternating magnetic field is generated around the induction coil. When the magnetic line of force of alternating magnetic field passes through the inside metal material of battery, a large amount of vortex is produced to metal material inside, and the heat effect of vortex and hysteresis loss make the battery produce a large amount of heats in the short time for battery temperature rises fast.
The hollow induction coil 4 is made of an enameled copper pipe and a hollow seamless copper pipe, and has a disc-shaped and spiral structure.
The cooling pipeline 6 mainly comprises a cooling pipe, a pump 7, a valve and the like. The pump 7 pumps the cooling medium in the cooling water tank 5 into the cooling pipe, and the cooling medium is led into the hollow induction coil 4 to exchange heat with the surface of the battery and then returns to the cooling water tank 5, so that a circulating cooling loop is formed, and the cooling efficiency is improved.
In one embodiment, an apparatus comprises:
a direct current power supply 1 for supplying power to the induction heating circuit 2;
an induction heating circuit 2 for converting a direct current into a frequency-modulated high-frequency alternating current and supplying the alternating current to the hollow induction coil 4 by connecting an output terminal to an inlet terminal 9 and an outlet terminal 11;
the hollow induction coil 4 is used for generating an alternating magnetic field in the surrounding space, the alternating magnetic field enables the interior of the lithium battery 3 to excite eddy current and generate heat, the coil can be wrapped on the surface of a cylindrical battery through spiral winding to perform overall preheating of the battery, and the coil can also be placed on the surfaces of a square battery and a soft package battery through coiling into a disc shape;
a cooling water tank 5 for storing and supplying a cooling medium at a certain temperature;
and the cooling pipeline 6 is used for conveying the cooling medium in the cooling water tank 5 to the inside of the hollow induction coil 4, the cooling medium in the cooling water tank 5 is introduced into the hollow induction coil 4 through the cooling medium inlet 8 under the action of the pump 7, is discharged from the cooling medium outlet 10 after exchanging heat with the surface of the battery, and returns to the cooling water tank 5 to form a circulating cooling loop.
The working principle of the invention is as follows: the direct current power supply inputs direct current to the induction heating circuit, high-frequency alternating current is output and is introduced into the hollow induction coil to generate an alternating magnetic field, metal materials in the battery in the alternating magnetic field generate eddy current, and the heat effect of the eddy current generates a large amount of heat in a short time to quickly raise the temperature of the battery; the coil is in close contact with the battery, the circulating cooling medium in the hollow coil effectively dissipates heat of the battery through heat conduction and heat convection, and simultaneously can take away ohmic heat accumulated by self resistance after the coil is electrified.
Finally, it should be noted that: the embodiments described are only a part of the embodiments of the present application, and not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments in the present application belong to the protection scope of the present application.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (7)
1. A temperature control device for a lithium battery is characterized by comprising,
a lithium battery, comprising at least one cell,
a hollow induction coil wound around an outer surface of the lithium battery to generate an alternating magnetic field that excites eddy currents and generates heat inside the lithium battery, the hollow induction coil including an inlet terminal and an outlet terminal,
the output end of the induction heating circuit is respectively connected with the inlet terminal and the outlet terminal so as to convert the direct current into high-frequency alternating current with adjustable frequency and provide the alternating current for the hollow induction coil;
a DC power supply connected to the induction heating circuit to supply DC power,
a cooling pipe including a cooling medium inlet and a cooling medium outlet respectively connected to both ends of the hollow induction coil, the cooling pipe transporting a cooling medium to the inside of the hollow induction coil via the cooling medium inlet and discharging via the cooling medium outlet,
and the cooling water tank is connected with the cooling pipeline to provide a cooling medium, and the cooling water tank, the cooling pipeline and the hollow induction coil form a circulating cooling loop of the cooling medium.
2. The lithium battery temperature control device of claim 1, wherein the circulating cooling loop preferably comprises a pump.
3. The lithium battery temperature control device of claim 2, wherein the pump is disposed in the cooling duct.
4. The lithium battery temperature control device of claim 1, wherein the lithium battery comprises a cylindrical lithium battery, a square lithium battery, and a soft pack lithium battery.
5. The lithium battery temperature control device of claim 1, wherein the hollow induction coil comprises an enameled copper tube or a hollow seamless copper tube.
6. The lithium battery temperature control device of claim 1, wherein the hollow induction coil is disk-shaped or spiral-shaped.
7. The lithium battery temperature control device of claim 1, wherein the cooling medium in the hollow induction coil effectively dissipates heat from the battery through heat conduction and heat convection.
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| CN211376891U (en) * | 2020-02-19 | 2020-08-28 | 上海能环实业有限公司 | Self-cooling system of high-speed magnetic levitation generator |
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| CN113506933A (en) * | 2021-06-18 | 2021-10-15 | 西安交通大学 | Lithium battery heating device |
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Application publication date: 20220201 |