CN114497801A - Balanced heat dissipation control device of power battery - Google Patents
Balanced heat dissipation control device of power battery Download PDFInfo
- Publication number
- CN114497801A CN114497801A CN202111646689.1A CN202111646689A CN114497801A CN 114497801 A CN114497801 A CN 114497801A CN 202111646689 A CN202111646689 A CN 202111646689A CN 114497801 A CN114497801 A CN 114497801A
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- Prior art keywords
- battery
- heat
- temperature
- battery pack
- heat dissipation
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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
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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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
- H01M10/655—Solid structures for heat exchange or heat conduction
-
- 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
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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)
- Secondary Cells (AREA)
Abstract
The invention relates to a balanced heat dissipation control device for a power battery, and belongs to the technical field of power batteries. The battery pack comprises a battery pack and a heat dissipation assembly, the heat dissipation assembly comprises a heat conduction pipe, cooling liquid and a heat conductor, a plurality of battery monomers are arranged in the battery pack, the battery monomers are located in the battery pack and correspond to the heat conduction pipe, the heat conduction pipe is connected with the heat conductor, a plurality of temperature sensors are arranged in the battery pack, a temperature control CPU is arranged in the battery pack, the temperature sensors are located in corresponding positions in the battery pack to carry out temperature monitoring and data acquisition, the temperature sensors are connected with the temperature control CPU, the heat conduction pipe and the heat conductor are made of superconducting materials, and the heat conductor dissipates heat through air cooling or water cooling. The balanced heat dissipation control device for the power battery, provided by the invention, is used for comprehensively analyzing various data by combining various condition changes of voltage, current, internal resistance, external temperature environment, working condition and charging and discharging condition of the power battery, so that the service life of the battery is longer and safer.
Description
Technical Field
The invention relates to a balanced heat dissipation control device for a power battery, and belongs to the technical field of power batteries.
Background
In recent years, new energy automobiles develop rapidly, and the safety and the service life of batteries are the primary tasks for developing new energy automobiles. The battery thermal management system is particularly important for safety, because the temperature has great influence on the service life and consistency of the battery, and particularly, once the temperature is out of control, a thermal runaway event, fire and explosion can be caused, and great threat can be caused to lives and property.
The battery expert Mikael Cugnet of the french atomic energy commission has been proposed in the lecture published by the American Chemical Society (ACS), and if used properly, the battery life of electric vehicles can even be as long as 20 years. Cugnet states that the life of a lithium ion battery estimated according to an accelerated test is about 8 years, but it cannot accurately reflect how long the lithium ion battery actually can last. He believes that electric vehicle batteries can operate reliably for 15 years, and perhaps even as long as 20 years, if used properly. The thermal reason for the power battery is that the battery itself will generate heat during the charging and discharging process, and the battery will generate heat more seriously when the battery temperature rises faster and the battery discharge power is larger. The heat energy of the battery can generate accumulation in a closed space, and a plurality of battery cores in one battery pack are different in heat tolerance and heat release amount under the same power due to the process limitation of the battery per se even for the same batch of products. The battery with large heat generation quantity can cause the temperature of the surrounding battery to rise, if the heat dissipation is not good, the heat accumulation phenomenon can occur, and if the temperature is too high, the thermal runaway event can be generated.
However, at present, the heat dissipation of the battery mainly adopts two modes: air-cooled and water-cooled modes. However, because the batteries are located at different positions, air cooling and water cooling cannot achieve rapid and uniform heat dissipation of all the batteries.
At present, in the thermal management application of power batteries, most of the temperature control of the power batteries basically adopts a water cooling or air cooling method and other heat dissipation methods, and a conventional battery safety management system adopts voltage equalization and current equalization which are almost independent management systems, so that a comprehensive management system with a real meaning does not exist.
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the balanced heat dissipation control device for the power battery, disclosed by the invention, is used for comprehensively analyzing various data by combining various condition changes of voltage, current, internal resistance, external temperature environment, working condition and charging and discharging condition of the power battery, so that the thermal runaway of the power battery is effectively realized.
The invention provides a power battery balanced heat dissipation control device which comprises a battery pack and a heat dissipation assembly, wherein the heat dissipation assembly comprises a heat conduction pipe, cooling liquid and a heat conductor, a plurality of battery monomers are arranged in the battery pack and correspond to the heat conduction pipe, the heat conduction pipe is connected with the heat conductor, a plurality of temperature sensors and a temperature control CPU are arranged in the battery pack, the temperature sensors are arranged at corresponding positions in the battery pack for temperature monitoring and data acquisition, the temperature sensors are connected with the temperature control CPU, the heat conduction pipe and the heat conductor are made of superconducting materials, and the heat conductor dissipates heat through any one of air cooling or water cooling.
The heat conduction pipe and the heat conductor are made of any one or more of copper, copper foil, silver plating and silver foil.
The method comprises the steps that a temperature control CPU collects and analyzes air temperature and battery temperature through a temperature sensor, performs comparison analysis processing on relevant parameters such as voltage, current and internal resistance on battery monomers in a region exceeding a set range value, locks the position of a fault battery, and sends out corresponding instructions or starts relevant preset programs.
When the temperature of the battery pack is high, the heat conduction pipe conducts the temperature of the battery monomer to the heat conductor; when the temperature of the battery pack is low, the heat conduction pipe conducts the temperature of the heat conductor to the battery monomer to form temperature circulation conduction, and therefore the battery temperature balance in the total battery pack is achieved.
The batteries with high temperature can also conduct heat to the batteries with low temperature, so that the temperature balance of the batteries in the whole battery pack is realized.
Two or more heat conduction pipes are arranged on the battery monomer and are effectively connected with the same heat conductor.
The preset instructions and programs of the temperature control CPU comprise triggering alarm, disconnecting a power supply, fusing a mechanism, forcibly dissipating heat and cooling, limiting current and forcibly balancing voltage.
The invention has the beneficial effects that:
the invention relates to a power battery balanced heat dissipation control device, which is used for comprehensively analyzing various data by combining various condition changes of voltage, current, internal resistance, external temperature environment, working condition and charging and discharging condition of a power battery, and is effective for thermal runaway of the power battery.
Drawings
FIG. 1: the invention relates to a schematic diagram of heat conduction pipe with heat transfer from heat conductor and left, right, up and down circulation
FIG. 2: the invention is a schematic diagram of heat conduction pipe with heat transfer from heat conductor and left-right and up-down circulation
FIG. 3: the invention relates to a heat conductor, a battery pack and a heat conduction pipe for heat transfer
FIG. 4: the invention relates to a heat conductor, a battery pack and a heat conduction pipe for heat transfer
FIG. 5: the invention discloses a schematic diagram of heat transfer between batteries by a heat conduction pipe.
FIG. 6: the invention discloses a schematic diagram for heat transfer of a heat conduction pipe in all directions in a balanced manner.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 to 6 show: the invention provides a power battery balanced heat dissipation control device which comprises a battery pack and a heat dissipation assembly, wherein the heat dissipation assembly comprises a heat conduction pipe, cooling liquid and a heat conductor, a plurality of battery monomers are arranged in the battery pack and correspond to the heat conduction pipe, the heat conduction pipe is connected with the heat conductor, a plurality of temperature sensors and a temperature control CPU are arranged in the battery pack, the temperature sensors are arranged at corresponding positions in the battery pack and are used for carrying out temperature monitoring and data acquisition, the temperature sensors are connected with the temperature control CPU, the heat conduction pipe and the heat conductor are made of superconducting materials, and the heat conductor is used for carrying out heat dissipation through any one of air cooling or water cooling.
The heat conduction pipe and the heat conductor are made of any one or more of copper, copper foil, silver plating and silver foil.
The temperature control CPU acquires and analyzes the air temperature and the battery temperature through the temperature sensor, performs comparative analysis processing on relevant parameters such as voltage, current, internal resistance and the like on the battery monomer in the area beyond the set range value, locks the position of a fault battery, and sends a corresponding instruction or starts a relevant preset program.
When the temperature of the battery pack is high, the heat conduction pipe conducts the temperature of the battery monomer to the heat conductor; when the temperature of the battery pack is low, the heat conduction pipe conducts the temperature of the heat conductor to the battery monomer to form temperature circulation conduction, and therefore the battery temperature balance in the total battery pack is achieved.
The battery with high temperature in the invention can also conduct heat to the battery with low temperature, thus realizing the temperature balance of the batteries in the whole battery pack.
The battery monomer is provided with two or more than two heat conduction pipes which are effectively connected with the same heat conductor.
The invention controls the CPU preset instructions and programs, including triggering alarm, cutting off power supply, fusing mechanism, forced heat dissipation and cooling, limiting current, and forced voltage equalization.
The invention does not need external power supply and other energy supply when working, and can realize full-time physical heat conduction, so that the temperature of the power battery can always keep the working state with the best consistency.
The working principle is as follows:
through temperature control CPU management logic, can be according to different types of batteries, the temperature under different operational environment or different operating modes is monitored and analyzed, temperature control CPU gathers the temperature in battery monomer and the battery package, to exceeding battery monomer and the module of setting value scope, carry out relevant parameter contrastive analysis processing such as voltage, electric current, internal resistance, and send corresponding instruction or start relevant preset program, carry out the method of effective control with power battery temperature, let the battery temperature control at best operating temperature state all the time, the uniformity of battery temperature is preserved, avoid power battery thermal runaway incident to take place, can also promote battery life to a great extent.
The heat transfer pipe is made of copper and a coolant, has a high cooling effect, not only conducts heat through metal, but also uses a refrigerant as a heat exchange medium, has a heat conductivity 200 times that of copper, and has excellent thermal responsiveness.
Unlike the conventional method (using a water-barrier sheet and a cooling pipe), the heat pipe is less likely to have a reduced cooling effect due to a reduced water flow caused by rust, scale, and the like, and is less likely to have a reduced amount of maintenance and repair work due to the evaporation and leakage of the coolant.
The problem of balanced heat dissipation of the battery is solved, and firstly, the problem of balanced heat conduction of the battery is solved. The heat conduction speed is determined by a conductive object material, in the total battery pack, the heat transfer between the batteries depends on air convection, the shell material conducts heat, the heat transfer speed is low, the temperature difference between the batteries is too large, the temperature consistency is poor, and the service life of the batteries and the safety of the batteries are seriously influenced.
The heat conduction pipe has excellent thermal responsiveness, conducts heat quickly, reasonably arranges the heat conduction pipe, is effectively connected to form a circulating heat conduction mode, and can solve the safety problem when the battery is used by heat accumulation of the battery and prolong the service life of the battery.
At battery monomer, battery module suitable position, install two or more than two heat pipes, and effective connection is at same heat-conducting body, conduct the heat-conducting body with battery temperature, carry out positive reverse circulation heat-conduction, because battery monomer position is different in the battery package, the heat conduction speed difference is big, lead to heat-conduction to the heat-conducting body above the back, different zone temperature is inconsistent, can increase heat pipe quantity as required, effectively be connected the use with the heat conduction material.
According to the size of a battery pack, a plurality of air temperature sensors are installed in the battery pack and distributed at appropriate positions in the battery pack, temperature monitoring and temperature data acquisition are carried out on the whole battery pack, a heat conduction pipe is combined with CPU control to cool down a battery monomer with overhigh temperature, the temperature control CPU locks the position of a fault battery through data analysis of battery temperature, voltage, internal resistance, working condition state and the like, and the preset instructions and programs of the temperature control CPU comprise triggering alarm, power supply disconnection, a fusing mechanism, forced cooling, current limiting and forced balanced voltage risk assessment and judgment.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a balanced heat dissipation controlling means of power battery which characterized in that: including battery package, radiator unit includes heat pipe, coolant liquid, heat conductor, be equipped with a plurality of battery monomers in the battery package, battery monomer is located the battery package and corresponds with the heat pipe, the heat pipe is connected with the heat conductor, be equipped with a plurality of temperature sensor, temperature control CPU in the battery package, it is a plurality of temperature sensor is located the battery package and carries out temperature monitoring and data acquisition corresponding to the position, temperature sensor is connected with temperature control CPU, heat pipe, heat conductor are superconducting material and make, the heat conductor dispels the heat through any one in forced air cooling or the water-cooling.
2. The balanced heat dissipation control device for the power battery according to claim 1, wherein: the heat conduction pipe and the heat conductor are made of any one or more of copper, copper foil, silver plating and silver foil.
3. The balanced heat dissipation control device for the power battery according to claim 1, wherein: the method comprises the steps that a temperature control CPU collects and analyzes air temperature and battery temperature through a temperature sensor, performs comparison analysis processing on relevant parameters such as voltage, current and internal resistance on battery monomers in a region exceeding a set range value, locks the position of a fault battery, and sends out corresponding instructions or starts relevant preset programs.
4. The balanced heat dissipation control device for the power battery according to claim 3, wherein: when the temperature of the battery pack is high, the heat conduction pipe conducts the temperature of the battery monomer to the heat conductor; when the temperature of the battery pack is low, the heat conduction pipe conducts the temperature of the heat conductor to the battery monomer to form temperature circulation conduction, and therefore the battery temperature balance in the total battery pack is achieved.
5. The balanced heat dissipation control device for the power battery according to claim 3, wherein: the batteries with high temperature can also conduct heat to the batteries with low temperature, so that the temperature balance of the batteries in the whole battery pack is realized.
6. The balanced heat dissipation control device for the power battery according to claim 3, wherein: two or more heat conduction pipes are arranged on the single battery and are effectively connected with the same heat conductor, and heat conduction is carried out between the single batteries.
7. The balanced heat dissipation control device for the power battery according to claim 3, wherein: the preset instructions and programs of the temperature control CPU comprise triggering alarm, disconnecting a power supply, fusing a mechanism, forcibly dissipating heat and cooling, limiting current and forcibly balancing voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646689.1A CN114497801A (en) | 2021-12-30 | 2021-12-30 | Balanced heat dissipation control device of power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646689.1A CN114497801A (en) | 2021-12-30 | 2021-12-30 | Balanced heat dissipation control device of power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114497801A true CN114497801A (en) | 2022-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111646689.1A Withdrawn CN114497801A (en) | 2021-12-30 | 2021-12-30 | Balanced heat dissipation control device of power battery |
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| Country | Link |
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| CN (1) | CN114497801A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117728079A (en) * | 2023-10-21 | 2024-03-19 | 南通国轩新能源科技有限公司 | Battery temperature control management method and system for new energy battery pack |
| GB2624051A (en) * | 2022-11-07 | 2024-05-08 | Cirrus Logic Int Semiconductor Ltd | A battery temperature control system |
-
2021
- 2021-12-30 CN CN202111646689.1A patent/CN114497801A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2624051A (en) * | 2022-11-07 | 2024-05-08 | Cirrus Logic Int Semiconductor Ltd | A battery temperature control system |
| CN117728079A (en) * | 2023-10-21 | 2024-03-19 | 南通国轩新能源科技有限公司 | Battery temperature control management method and system for new energy battery pack |
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Application publication date: 20220513 |
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| WW01 | Invention patent application withdrawn after publication |