CN111987386B - High-temperature fault cooling protection system for lithium power battery and control method thereof - Google Patents
High-temperature fault cooling protection system for lithium power battery and control method thereof Download PDFInfo
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- CN111987386B CN111987386B CN202010897312.2A CN202010897312A CN111987386B CN 111987386 B CN111987386 B CN 111987386B CN 202010897312 A CN202010897312 A CN 202010897312A CN 111987386 B CN111987386 B CN 111987386B
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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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- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a cooling protection system for high-temperature faults of a lithium power battery, which comprises: a power battery; the power battery comprises a first diode, a second diode and a first storage battery which are sequentially connected in series at two ends of the power battery, wherein the anode of the second diode is connected with the first diode, and the cathode of the second diode is connected with the first storage battery; the third diode and the refrigerating sheet are sequentially connected in series between the power battery and the first diode, wherein the anode of the third diode is connected with the first diode, and the cathode of the third diode is connected with the refrigerating sheet; and two ends of the mercury switch thermometer are respectively connected with the cathode of the second diode and the cathode of the third diode. The invention further provides a control method of the lithium power battery high-temperature fault cooling protection system.
Description
Technical Field
The invention relates to a cooling protection system for a high-temperature fault of a lithium power battery and a control method thereof.
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: firstly, the contact area between the water cooling pipeline and the lithium battery cell is limited, and the refrigeration effect is poor; secondly, the volume of the battery is greatly increased due to the arrangement of the water storage tank.
Disclosure of Invention
The invention provides a cooling protection system for a high-temperature fault of a lithium power battery and a control method thereof, which can effectively solve the problems.
The invention is realized by the following steps:
a lithium power battery high temperature fault cooling protection system includes:
a power battery;
the power battery comprises a first diode, a second diode and a first storage battery which are sequentially connected in series at two ends of the power battery, wherein the anode of the second diode is connected with the first diode, and the cathode of the second diode is connected with the first storage battery;
the third diode and the refrigerating sheet are sequentially connected in series between the power battery and the first diode, wherein the anode of the third diode is connected with the first diode, and the cathode of the third diode is connected with the refrigerating sheet; and
and two ends of the mercury switch thermometer are respectively connected with the cathode of the second diode and the cathode of the third diode, and the mercury switch thermometer is in a non-conducting state at a set temperature and is in a conducting state above the set temperature.
Further, the set temperature is 40-50 ℃.
As a further improvement, the mercury thermometer further comprises a fourth diode, wherein the anode of the fourth diode is connected with the mercury switch thermometer, and the cathode of the fourth diode is connected with the cathode of the third diode.
A control method of the lithium power battery high-temperature fault cooling protection system comprises the following steps:
s1, when the power battery works normally, the power battery respectively charges the first storage battery and supplies power to the refrigeration sheet;
and S2, when the power battery is short-circuited and the temperature rises, the first storage battery replaces the power battery to supply power to the refrigeration sheet.
The invention has the beneficial effects that: through the circuit structure, the power battery respectively charges the first storage battery and supplies power to the refrigeration piece when the power battery works normally through the use of the mercury switch thermometer; when the power battery is short-circuited or damaged at high temperature to cause temperature rise, the first storage battery replaces the power battery to supply power to the refrigeration sheet; further ensuring that the refrigerating sheet can normally supply power for refrigeration no matter the power battery works normally or is damaged due to high temperature; 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 lithium power battery high-temperature fault cooling protection system provided by an embodiment of the invention.
Fig. 2 is a schematic diagram of the power battery in the lithium power battery high-temperature fault cooling protection system according to the embodiment of the present invention, which works when the power battery is damaged.
Fig. 3 is a schematic diagram illustrating normal operation of a lithium power battery high-temperature fault cooling protection system according to another embodiment of the present invention.
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 cooling protection system for a high-temperature fault of a lithium power battery, including:
a power battery 10;
a first diode 11, a second diode 12 and a first storage battery 15 which are sequentially connected in series at two ends of the power battery 10, wherein the anode of the second diode 12 is connected with the first diode 11, and the cathode of the second diode 12 is connected with the first storage battery 15;
a third diode 13 and a refrigeration piece 16 sequentially connected in series between the power battery 10 and the first diode 11, wherein the anode of the third diode 13 is connected with the first diode 11, and the cathode of the third diode 13 is connected with the refrigeration piece 16; and
both ends of the mercury switching thermometer 14 are connected to the cathode of the second diode 12 and the cathode of the third diode 13, respectively. The mercury switch thermometer 14 is in a non-conductive state at a set temperature and is in a conductive state at a set temperature or higher. The set temperature is 40-50 ℃.
Preferably, the cooling sheet 16 is disposed on the surface of the power battery 10, and the mercury switch thermometer 14 is also attached to the outer surface of the power battery 10.
Generally speaking, the optimum working temperature of the lithium ion power battery is within 40 ℃, so that the set temperature of the mercury switch thermometer 14 is 40-50 ℃, and therefore, when the temperature of the whole system exceeds 40 ℃, the first storage battery 15 can supply power to the refrigerating sheet 16 to ensure normal refrigeration of the refrigerating sheet.
As a further improvement, in other embodiments, the lithium-ion power battery high-temperature drop protection system further includes a fourth diode 17, an anode of which is connected to the mercury switch thermometer 14, and a cathode of which is connected to a cathode of the third diode 13.
The embodiment of the invention further provides a control method of the cooling protection system for the high-temperature fault of the lithium power battery, which comprises the following steps:
s1, when the power battery 10 works normally, the power battery 10 charges the first storage battery 15 and supplies power to the refrigeration sheet 16 respectively;
and S2, when the power battery 10 is short-circuited and the temperature rises, the first storage battery 15 replaces the power battery 10 to supply power to the refrigeration sheet 16.
Referring to fig. 3, an embodiment of the present invention provides a cooling protection system for a high-temperature fault of a lithium power battery, including:
a power battery 10;
the power battery comprises a first diode 11, a second mercury switch thermometer 18, a second diode 12 and a first storage battery 15 which are sequentially connected in series at two ends of the power battery 10, wherein the anode of the second diode 12 is connected with one end of the second mercury switch thermometer 18, the cathode of the second diode 12 is connected with the first storage battery 15, and the cathode of the first diode 11 is connected with the other end of the second mercury switch thermometer 18. The second mercury switch thermometer 18 is in a non-conductive state at a second set temperature and is in a conductive state at a temperature equal to or higher than the second set temperature. The set temperature is 20-30 ℃.
A third diode 13 and a refrigerating sheet 16 which are sequentially connected in series between the power battery 10 and a second mercury switch thermometer 18, wherein the anode of the third diode 13 is connected with one end of the second mercury switch thermometer 18, and the cathode of the third diode 13 is connected with the refrigerating sheet 16; and
both ends of the first mercury switching thermometer 14 are connected to the cathode of the second diode 12 and the cathode of the third diode 13, respectively. The first mercury switch thermometer 14 is in a non-conductive state at a first set temperature and is in a conductive state at or above the first set temperature. The first set temperature is 40-50 ℃.
The embodiment of the invention further provides a control method of the cooling protection system for the high-temperature fault of the lithium power battery, which comprises the following steps:
s3, when the power battery 10 operates at a temperature lower than normal temperature, the second mercury switch thermometer 18 is turned off, and the first battery 15 and the cooling plate 16 stop operating;
s4, when the power battery 10 works at normal temperature, the power battery 10 respectively charges the first storage battery 15 and supplies power to the refrigeration sheet 16;
and S5, when the power battery 10 is short-circuited and the temperature rises, the first storage battery 15 replaces the power battery 10 to supply power to the refrigeration sheet 16.
The first storage battery 15 may be disposed near one side of the power battery 10, so that when the power battery operates at a temperature lower than normal temperature, the first storage battery 15 reaches an operating temperature by preheating the residual heat of the power battery 10.
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 (3)
1. A cooling protection system for high-temperature fault of lithium power battery is characterized in that,
a power cell (10);
a first diode (11), a second mercury switch thermometer (18), a second diode (12) and a first storage battery (15) which are sequentially connected in series with two ends of the power battery (10), wherein the anode of the second diode (12) is connected with one end of the second mercury switch thermometer (18), the cathode of the second diode (12) is connected with the first storage battery (15), the cathode of the first diode (11) is connected with the other end of the second mercury switch thermometer (18), the second mercury switch thermometer (18) is in a non-conducting state at a second set temperature and is in a conducting state above the second set temperature, and the second set temperature is 20-30 ℃;
a third diode (13) and a refrigerating sheet (16) which are sequentially connected in series between the power battery (10) and the second mercury switch thermometer (18), wherein the positive electrode of the third diode (13) is connected with one end of the second mercury switch thermometer (18), and the negative electrode of the third diode (13) is connected with the refrigerating sheet (16); and
the two ends of the mercury switch thermometer (14) are respectively connected with the cathode of the second diode (12) and the cathode of the third diode (13), the mercury switch thermometer (14) is in a non-conduction state at a first set temperature and is in a conduction state above the first set temperature, and the first set temperature is 40-50 ℃.
2. The lithium-ion power battery high-temperature fault temperature reduction protection system according to claim 1, further comprising a fourth diode (17) having an anode connected to the mercury switch thermometer (14) and a cathode connected to the cathode of the third diode (13).
3. A control method of a lithium power battery high temperature fault cool-down protection system according to any one of claims 1-2, characterized by comprising the following steps:
s1, when the power battery (10) works at a temperature lower than normal temperature, the second mercury switch thermometer (18) is switched off, and the first storage battery (15) and the refrigerating sheet (16) stop working;
s2, when the power battery (10) works normally, the power battery (10) charges the first storage battery (15) and supplies power to the refrigerating sheet (16);
s3, when the power battery (10) is short-circuited and the temperature rises, the first storage battery (15) replaces the power battery (10) to supply power to the refrigeration sheet (16).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010897312.2A CN111987386B (en) | 2020-08-31 | 2020-08-31 | High-temperature fault cooling protection system for lithium power battery and control method thereof |
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| CN202010897312.2A CN111987386B (en) | 2020-08-31 | 2020-08-31 | High-temperature fault cooling protection system for lithium power battery and control method thereof |
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| CN111987386A CN111987386A (en) | 2020-11-24 |
| CN111987386B true CN111987386B (en) | 2021-11-12 |
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| CN2665947Y (en) * | 2003-09-05 | 2004-12-22 | 比亚迪股份有限公司 | Power lithium ion secondary battery |
| 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 |
| CN208423102U (en) * | 2018-06-14 | 2019-01-22 | 厦门盈趣科技股份有限公司 | A kind of temperature controlled bicycle electric power device of band |
| CN110370988A (en) * | 2019-07-15 | 2019-10-25 | 重庆工商大学 | New energy car battery is for electric regulating system |
| CN110911775A (en) * | 2018-09-17 | 2020-03-24 | 沃尔沃汽车公司 | Power battery cooling system and method based on solar skylight |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4848780B2 (en) * | 2006-01-27 | 2011-12-28 | トヨタ自動車株式会社 | Control device for cooling fan |
| 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 |
| CN211295174U (en) * | 2019-11-18 | 2020-08-18 | 刘银杰 | Stable form new forms of energy battery box that protection effect is good |
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- 2020-08-31 CN CN202010897312.2A patent/CN111987386B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2665947Y (en) * | 2003-09-05 | 2004-12-22 | 比亚迪股份有限公司 | Power lithium ion secondary battery |
| 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 |
| CN208423102U (en) * | 2018-06-14 | 2019-01-22 | 厦门盈趣科技股份有限公司 | A kind of temperature controlled bicycle electric power device of band |
| CN110911775A (en) * | 2018-09-17 | 2020-03-24 | 沃尔沃汽车公司 | Power battery cooling system and method based on solar skylight |
| CN110370988A (en) * | 2019-07-15 | 2019-10-25 | 重庆工商大学 | New energy car battery is for electric regulating system |
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| CN111987386A (en) | 2020-11-24 |
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