CN111987385B - Temperature control system and method for lithium power battery - Google Patents
Temperature control system and method for lithium power battery Download PDFInfo
- Publication number
- CN111987385B CN111987385B CN202010895877.7A CN202010895877A CN111987385B CN 111987385 B CN111987385 B CN 111987385B CN 202010895877 A CN202010895877 A CN 202010895877A CN 111987385 B CN111987385 B CN 111987385B
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- power battery
- diode
- battery
- temperature
- ptc thermistor
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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
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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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
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- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a temperature control system of a lithium power battery, which comprises: a power battery; the power battery comprises a first diode, a PTC thermistor and a first storage battery which are sequentially connected in series at two ends of the power battery, wherein the positive electrode of the first diode is connected with the power battery, the negative electrode of the first diode is connected with one end of the PTC thermistor, the other end of the PTC thermistor is connected with the first storage battery, the PTC thermistor is in a conducting state at the set working temperature of the power battery, and is in a non-conducting state above the set working temperature of the power battery; the first diode, the second diode and the thermoelectric piece are sequentially connected in series at two ends of the power battery, and the cathode of the second diode is connected with the other end of the PTC thermistor; and the mercury switch thermometer, the third diode and the refrigerating sheet are sequentially connected in series at two ends of the first storage battery, the mercury switch thermometer is in a non-conduction state when the alarm temperature is set by the power battery, and is in a conduction state when the alarm temperature is set by the power battery.
Description
Technical Field
The invention relates to a temperature control system and a temperature control method for a lithium power battery.
Background
At present, lithium power batteries are one of the core components of electric vehicles, and are now widely used in the field of electric vehicles. The lithium power battery can generate heat when in work, and the heat can not be dissipated in time, so that the lithium power battery can be overheated to cause fire disasters and accidents. In order to prevent overheating and fire, the conventional lithium power battery is generally provided with a cooling device to cool the battery, for example, a water cooling pipeline is installed in the middle of the lithium battery, a small water storage tank is installed at the rear part of the water cooling pipeline, and water is used as a medium to cool the lithium battery. This prior art has the following problems: the heat generated by the lithium ion battery cannot be effectively utilized under normal operation.
Disclosure of Invention
The invention provides a temperature control system and a temperature control method for a lithium power battery, which can effectively solve the problems.
The invention is realized by the following steps:
a lithium power cell temperature control system comprising:
a power battery;
the power battery comprises a first diode, a PTC thermistor and a first storage battery which are sequentially connected in series with two ends of the power battery, wherein the positive electrode of the first diode is connected with the power battery, the negative electrode of the first diode is connected with one end of the PTC thermistor, the other end of the PTC thermistor is connected with the first storage battery, the PTC thermistor is in a conducting state at the set working temperature of the power battery, and is in a non-conducting state above the set working temperature of the power battery;
the first diode, the second diode and the thermoelectric piece are sequentially connected in series at two ends of the power battery, and the cathode of the second diode is connected with the other end of the PTC thermistor; and
the power battery comprises a mercury switch thermometer, a third diode and a refrigerating piece, wherein the mercury switch thermometer, the third diode and the refrigerating piece are sequentially connected in series at two ends of a first storage battery, the anode of the third diode is connected with one end of the mercury switch thermometer, the cathode of the third diode is connected with the refrigerating piece, the mercury switch thermometer is in a non-conducting state when the power battery sets an alarm temperature, and is in a conducting state when the power battery sets the alarm temperature.
The invention further provides a control method of the temperature control system of the lithium power battery, which comprises the following steps:
s1, when the power battery reaches the set working temperature, the power battery and the thermoelectric sheet charge the first storage battery simultaneously;
and S2, when the power battery reaches the set alarm temperature, the thermoelectric piece and the first storage battery supply power to the refrigerating piece at the same time, so that the refrigeration of the power battery is realized.
The invention has the beneficial effects that: through the circuit structure of the invention, the PTC thermistor is used, so that when the power battery works normally, the thermoelectric pieces of the power battery respectively charge the first storage battery, and the heat generated when the power battery works is effectively utilized; when the power battery sets the alarm temperature, the thermoelectric piece and the first storage battery supply power to the refrigeration piece at the same time; further ensuring that the power battery is rapidly cooled; in addition, due to the use of the refrigerating sheet, the cooling effect can be obviously improved, and the whole volume and weight of the system can be changed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of normal operation of a temperature control system for a lithium power battery according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the operation of the temperature control system for lithium-ion power batteries according to the embodiment of the present invention when setting the alarm temperature.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any 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.
Referring to fig. 1-2, an embodiment of the present invention provides a temperature control system for a lithium power battery, including:
a power battery 10;
a first diode 11, a PTC thermistor 12 and a first storage battery 13 sequentially connected in series to two ends of the power battery 10, wherein the positive electrode of the first diode 11 is connected to the power battery 10, the negative electrode of the first diode 11 is connected to one end of the PTC thermistor 12, the other end of the PTC thermistor 12 is connected to the first storage battery 13, the PTC thermistor 12 is in a conductive state at a set operating temperature of the power battery 10, and is in a non-conductive state above the set operating temperature of the power battery 10;
a second diode 15 and a thermoelectric piece 14, wherein the first diode 11, the second diode 15 and the thermoelectric piece 14 are sequentially connected in series at two ends of the power battery 10, and the cathode of the second diode 15 is connected to the other end of the PTC thermistor 12; and
the power battery comprises a mercury switch thermometer 16, a third diode 17 and a refrigerating sheet 18 which are sequentially connected in series with two ends of the first storage battery 13, wherein the anode of the third diode 17 is connected with one end of the mercury switch thermometer 16, the cathode of the third diode 17 is connected with the refrigerating sheet 18, the mercury switch thermometer 16 is in a non-conducting state when the power battery 10 sets an alarm temperature, and is in a conducting state when the power battery 10 sets the alarm temperature or higher.
As a further improvement, the set working temperature is 20-40 ℃. In one embodiment, the set operating temperature is about 40 ℃.
As a further improvement, the set alarm temperature is 40-60 ℃. The set alarm temperature may be slightly higher than the set operating temperature, which in one embodiment is about 42 ℃.
As a further improvement, the thermoelectric sheet 14 and the refrigeration sheet 18 are symmetrically arranged on two sides of the power battery 10.
As a further improvement, the present invention further provides a control method of the temperature control system for lithium power battery, comprising the following steps:
s1, when the power battery 10 reaches the set working temperature, the power battery 10 and the thermoelectric sheet 14 charge the first storage battery 13 at the same time;
and S2, when the power battery 10 reaches the set alarm temperature, the thermoelectric sheet 14 and the first storage battery 13 simultaneously supply power to the refrigerating sheet 18, so that the refrigeration of the power battery 10 is realized.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A temperature control system of a lithium power battery is characterized in that,
a power cell (10);
the power battery comprises a first diode (11), a PTC thermistor (12) and a first storage battery (13) which are sequentially connected in series with two ends of the power battery (10), wherein the positive electrode of the first diode (11) is connected with the power battery (10), the negative electrode of the first diode (11) is connected with one end of the PTC thermistor (12), the other end of the PTC thermistor (12) is connected with the first storage battery (13), the PTC thermistor (12) is in a conducting state at the set working temperature of the power battery (10) and is in a non-conducting state above the set working temperature of the power battery (10);
a second diode (15) and a thermoelectric piece (14), wherein the first diode (11), the second diode (15) and the thermoelectric piece (14) are sequentially connected in series at two ends of the power battery (10), and the cathode of the second diode (15) is connected with the other end of the PTC thermistor (12); and
the power battery comprises a mercury switch thermometer (16), a third diode (17) and a refrigerating sheet (18) which are sequentially connected in series with the two ends of the first storage battery (13), wherein the anode of the third diode (17) is connected with one end of the mercury switch thermometer (16), the cathode of the third diode (17) is connected with the refrigerating sheet (18), the mercury switch thermometer (16) is in a non-conducting state when the alarm temperature of the power battery (10) is set, and is in a conducting state when the alarm temperature of the power battery (10) is set.
2. The temperature control system for lithium-ion power batteries according to claim 1, wherein the set operating temperature is 20-40 ℃.
3. The temperature control system for a lithium-ion power battery according to claim 1, wherein the set alarm temperature is 40-60 ℃.
4. The lithium power battery temperature control system according to claim 1, characterized in that the thermoelectric sheet (14) and the refrigeration sheet (18) are symmetrically arranged on both sides of the power battery (10).
5. A control method of the temperature control system of the lithium-ion power battery according to any one of claims 1 to 4, comprising the steps of:
s1, when the power battery (10) reaches the set working temperature, the power battery (10) and the thermoelectric sheet (14) charge the first storage battery (13) simultaneously;
s2, when the power battery (10) reaches the set alarm temperature, the thermoelectric sheet (14) and the first storage battery (13) supply power to the refrigerating sheet (18) at the same time, and refrigeration of the power battery (10) is achieved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010895877.7A CN111987385B (en) | 2020-08-31 | 2020-08-31 | Temperature control system and method for lithium power battery |
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| CN202010895877.7A CN111987385B (en) | 2020-08-31 | 2020-08-31 | Temperature control system and method for lithium power battery |
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| CN111987385A CN111987385A (en) | 2020-11-24 |
| CN111987385B true CN111987385B (en) | 2022-02-15 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001210389A (en) * | 2000-01-31 | 2001-08-03 | Sanyo Electric Co Ltd | Electric power supply equipped with battery |
| JP2005293971A (en) * | 2004-03-31 | 2005-10-20 | Sanyo Electric Co Ltd | Power source device with battery |
| CN105895973A (en) * | 2015-03-16 | 2016-08-24 | 中国新能源汽车有限公司 | Power management in electric vehicles |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5889391A (en) * | 1997-11-07 | 1999-03-30 | Sierra Applied Sciences, Inc. | Power supply having combined regulator and pulsing circuits |
| CN206697577U (en) * | 2016-12-28 | 2017-12-01 | 郑州宇通客车股份有限公司 | The power battery cooling system and electric car of a kind of energy-conservation |
| CN108494057A (en) * | 2017-11-05 | 2018-09-04 | 杨春晓 | Lead-acid accumulator or battery set charge/discharge device |
| CN108461835A (en) * | 2018-02-13 | 2018-08-28 | 天津大学 | A kind of urgent cooling system of batteries of electric automobile based on Peltier effect |
| CN110911775B (en) * | 2018-09-17 | 2022-11-15 | 沃尔沃汽车公司 | Power battery cooling system and method based on solar skylight |
| CN109962317B (en) * | 2019-03-27 | 2020-11-27 | 山东大学 | Thermal management and energy recovery system and method for battery module of electric vehicle |
| CN210167483U (en) * | 2019-08-23 | 2020-03-20 | 张汉林 | Lithium battery temperature management system |
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- 2020-08-31 CN CN202010895877.7A patent/CN111987385B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001210389A (en) * | 2000-01-31 | 2001-08-03 | Sanyo Electric Co Ltd | Electric power supply equipped with battery |
| JP2005293971A (en) * | 2004-03-31 | 2005-10-20 | Sanyo Electric Co Ltd | Power source device with battery |
| CN105895973A (en) * | 2015-03-16 | 2016-08-24 | 中国新能源汽车有限公司 | Power management in electric vehicles |
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