CN111864298A - Lithium battery passive heat dissipation treatment device based on sodium polyacrylate hydrogel - Google Patents
Lithium battery passive heat dissipation treatment device based on sodium polyacrylate hydrogel Download PDFInfo
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- CN111864298A CN111864298A CN202010579613.0A CN202010579613A CN111864298A CN 111864298 A CN111864298 A CN 111864298A CN 202010579613 A CN202010579613 A CN 202010579613A CN 111864298 A CN111864298 A CN 111864298A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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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
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
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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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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
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- Transportation (AREA)
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- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a thermal management system of a lithium battery pack of an electric automobile, in particular to a passive heat dissipation treatment device based on sodium polyacrylate hydrogel. The lithium iron phosphate battery pack comprises an external frame of the battery pack, the lithium iron phosphate battery pack and the sodium polyacrylate hydrogel filled between the frame and the battery pack, and is characterized in that the sodium polyacrylate hydrogel is filled between single cells of the battery pack. Tests show that the sodium polyacrylate hydrogel has the advantages of being used as a lithium iron phosphate ion battery pack heat dissipation system, including reducing the temperature rise in the battery pack and the temperature gradient in the battery pack, keeping the battery pack in a safe working temperature range and prolonging the service life of the battery pack.
Description
Technical Field
The invention relates to a thermal management system of a lithium battery pack of an electric automobile, in particular to a passive heat dissipation treatment device based on sodium polyacrylate hydrogel.
Background
The lithium iron phosphate battery pack is one of the core components of the electric automobile, and a proper temperature range is required for the normal and reliable operation of the battery pack. In the application of the thermal management system of the lithium iron phosphate battery pack to the electric automobile, the thermal management system has important significance for relieving the rapid temperature rise of the battery in the charging and discharging process and improving the stability and the performance of the battery. Thermal management systems are generally divided into two types, active cooling systems and passive cooling systems. Active cooling systems generally rely on the circulation of cold air or liquid to dissipate heat, so that pumps, fans or other power consuming devices are essential in the implementation of the system, and the active cooling method is difficult to implement due to the power consumption of cooling fans and the space limitations of electric vehicles. Passive cooling systems typically dissipate heat by sandwiching a high energy absorbing material between adjacent batteries. Phase change materials, which are the most widely studied cooling materials at present, utilize their high latent heat storage capacity to control the temperature of the battery pack. For example, phase change materials are added to various substrates, such as aluminum substrates and graphite substrates, to overcome the problem of poor heat transfer. However, the specific heat and the heat conductivity coefficient of the material in the solid phase and the liquid phase are low, so that the efficiency of the material in treating large heat dissipation and high temperature generated by high-power discharge is greatly reduced; another disadvantage is its fluidity in the liquid state: liquid may flow out of the battery pack and insulate the device, which necessitates sealing of the thermal management system.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a novel passive heat dissipation treatment device for hydrogel based on sodium polyacrylate. Hydrogels have good biocompatibility and are widely used in the biomedical field, but hydrogel-based thermal management systems have little research in the field of heat dissipation. A hydrogel is a solid material consisting of water and a three-dimensional network, the water mass concentration can vary between 70% and 99% when different materials are used to form the network. The stress intensity and shape of the hydrogel can change when different additives and matrices are added.
The present invention achieves the above object by the following technical means.
The utility model provides a processing apparatus that dispels heat passively of aquogel based on sodium polyacrylate, includes the outer frame of group battery, lithium iron phosphate group battery and packs the sodium polyacrylate hydrogel in the middle of frame and group battery, its characterized in that, packs sodium polyacrylate hydrogel between the monolithic battery of group battery.
In the passive heat dissipation device, the outer frame of the battery pack adopts a 304 stainless steel shell.
In the passive heat dissipation device, the distance between two adjacent lithium iron phosphate batteries is half the thickness of the batteries.
In the passive heat dissipation device, the filler between the passive heat dissipation device and the passive heat dissipation device is sodium polyacrylate hydrogel, as shown in 1-1 in figure 1.
Further, the outer frame of the battery pack made of 304 stainless steel was closed except for the positive direction of the Z axis shown in fig. 1.
Further, square battery pieces of a lithium battery are arranged in the heat dissipation device, the distance between the square battery pieces is half of the thickness of the battery pieces according to the specification of [ 0007 ], then sodium polyacrylate particles are arranged in the gaps,
further, deionized water was injected along one side of the opening of the apparatus using a 1L beaker, and the volume of the injected deionized water was calculated by the following equation:
and (3) directly injecting the ionized water into the battery modules of the sodium polyacrylate particles which are uniformly distributed to obtain the hydrogel TMS for the experiment. Due to the high hygroscopicity of sodium polyacrylate, solid hydrogels are formed immediately.
Further, the open side of the frame was sealed with a 304 stainless steel casing.
Further, to ensure the safety of the hydrogel battery, the resistivity of the sodium polyacrylate hydrogel was measured with a dc digital resistance meter, which was greater than 10 μm cm, sufficient to withstand the electric field in the battery.
Further, the hydrogel is disposed on both outer sides of the battery pack, as shown at 1-1 in fig. 1.
Further, a constant current discharge experiment is carried out on a 4S1P 3Ah lithium iron phosphate battery pack, the battery pack is charged at 1C, the voltage is 4.2V in the constant current charging stage until the current reaches C/36, and the balance time is 1 h.
Further, during the discharge, the initial temperature was between 22.5 ℃ and 23.5 ℃, and the discharge cutoff voltage of each cell was set to 3V.
Further, during the discharging process, two K-type thermocouples are connected to each battery pack to measure the temperature, one thermocouple is placed in the center of the battery pack, i.e., point a in fig. 1, and the other thermocouple is placed in the center of the surface of the battery pack, i.e., point B in fig. 1.
Furthermore, a 4S1P 3Ah lithium iron phosphate battery pack was subjected to a 4-cycle continuous high-rate charge-discharge test, and no rest time was set between the charge-discharge processes in one cycle or between two consecutive cycles.
Further, the maximum discharge current and the maximum charge current were each set to 7.5A (2.5C).
Further, for safety reasons, a cut-off temperature of 75 ℃ was used during the experiment.
Further, during the charging and discharging processes, two K-type thermocouples are connected to each battery pack to measure the temperature, one thermocouple is placed in the center of the battery pack, i.e., at point a in fig. 1, and the other thermocouple is placed in the center of the surface of the battery pack, i.e., at point B in fig. 1.
When the lithium iron phosphate battery pack works, the generated heat mainly comprises two parts: reversible heat and internal resistance heat. The reversible heat is related to entropy change inside the battery in the reaction process, and the related reaction formula is as follows:
wherein I represents the intensity of charge and discharge current, T represents the temperature of the battery pack, and UocRepresenting the open circuit voltage.
The internal resistance heat is related to the internal resistance of the battery, and the related reaction formula is as follows:
Qi＝I2(Rp+RIC) (2)
wherein I represents the charge-discharge current intensity and RpIndicating internal resistance to polarization, RICIndicating the contact internal resistance.
Internal resistance is often the primary cause of lithium iron phosphate battery pack heating at high power. After a simple calculation of the given value (current intensity 10A), the amount of heat generated by the internal resistance is about 30 times the amount of heat generated by the reversible process. Therefore, only the heat generated by the internal resistance is considered for this invention.
For a lithium iron phosphate battery without a hydrogel heat dissipation system, the heat balance equation is as follows:
the internal resistance of the entire battery pack generates heat as follows:
in the formula (I), the compound is shown in the specification,
the average internal resistance of the whole battery pack in the charging and discharging process can be calculated by the following formula:
wherein R isiThe internal resistance of the battery pack at different discharge depths is measured by a battery analyzer in the discharge process, and n is a data number.
In the device, the heat conductivity coefficients of the battery pack in all directions are calculated by the following formulas respectively:
thermal conductivity in X direction:
wherein liAnd kiIndicating the thickness and thermal conductivity of the different components within the cell.
Thermal conductivity in Y and Z directions:
the density and specific heat capacity were calculated from the thickness of each part by the following formula:
in the battery pack, the transient three-dimensional energy balance equation is as follows:
where Q is calculated according to equation (3), at the surface boundary of the battery without hydrogel coverage, the heat transfer to the face and radiant should be considered, the calculation equation is as follows:
convection heat exchange: q. q.sc＝hc(T-Tamb) (9)
Radiation heat exchange:
equations (9) and (10) may be further combined as:
in the formula, hc、TambT, and σ represent the convective heat transfer coefficient, ambient temperature, cell surface temperature, emissivity, and stefan-boltzmann constant, respectively.
For the lithium iron phosphate battery pack provided with the hydrogel heat dissipation system, the transient three-dimensional energy balance equation of the battery pack is the same as the equation (8); for hydrogels, the three-dimensional energy balance equation is as follows:
in the formula, the subscript h represents a hydrogel. In lithium iron phosphate batteries loaded with hydrogels, the thermodynamic boundary conditions were as follows:
monolithic cell and hydrogel:
hydrogel to air interface: 
A monolithic cell and air interface;
the invention has the beneficial effects that:
1) the experimental results at high discharge rates (10A) show that the sodium polyacrylate hydrogel has excellent performance in reducing the temperature rise and temperature gradient within the battery.
2) Continuous charge and discharge safety test shows that the battery pack without sodium polyacrylate hydrogel has potential safety hazard caused by high temperature, and when the sodium polyacrylate hydrogel is used, the lithium iron phosphate battery pack can be kept in a safe working temperature range in the whole test process.
3) The battery using the sodium polyacrylate hydrogel showed a lower capacity fade rate compared to the high fade rate of the battery under ambient conditions, which may extend the service life of the battery.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of exemplary embodiments of the invention, as illustrated in the accompanying drawings.
Fig. 1 shows a lithium iron phosphate battery pack at ambient temperature and provided with sodium polyacrylate hydrogel, wherein the center of the battery pack, i.e., point a, and the center of the battery pack surface, i.e., point B, require installation of a K-type thermocouple to measure temperature, and a three-dimensional coordinate axis for calculating the internal thermal conductivity of the lithium iron phosphate battery pack as a direction, and in addition, 1-1 represents the sodium polyacrylate hydrogel in the lithium iron phosphate battery pack provided with the sodium polyacrylate hydrogel, 1-2 represents the lithium iron phosphate battery pack in the lithium iron phosphate battery pack provided with the sodium polyacrylate hydrogel, and 1-3 represents the lithium iron phosphate battery pack of the lithium iron phosphate battery pack at ambient temperature.
Fig. 2 shows the temperature of the specified point of the lithium iron phosphate battery pack, i.e. the center of the battery pack in fig. 1, i.e. point a, and the center of the battery pack surface, i.e. point B, at different current intensities of 3A and 7.5A during continuous constant current discharge, the curves representing in sequence from bottom to top: discharge current 3A, hydrogel battery B point; discharging current 3A, hydrogel battery A point; discharging current 3A, battery B point under environment; discharging current 3A, and battery pack A point under the environment; discharge current 7.5A, hydrogel battery B point; discharge current 7.5A, hydrogel battery A point; discharging current is 7.5A, and a battery pack B point is arranged under the environment; discharge current 7.5A, battery A point under the environment.
Fig. 3 shows the temperature of the specified point of the lithium iron phosphate battery pack, i.e. the center of the battery pack in fig. 1, i.e. point a, and the center of the battery pack surface, i.e. point B, at different current intensities 5A and 10A during continuous constant current discharge, the curves representing in sequence from bottom to top: discharge current 5A, hydrogel battery B point; discharge current 5A, hydrogel battery A point; discharging current 5A, and battery pack B point under the environment; discharging current 5A, and battery pack A point under the environment; discharge current 10A, hydrogel battery B point; discharge current 10A, hydrogel battery A point; discharge current 10A, battery B point under environment; discharge current 10A, battery a point under ambient.
Fig. 4 shows a lithium iron phosphate battery pack at ambient temperature, and when discharging at a continuous constant current, different current intensities are shown, the center of the battery pack in fig. 1, i.e., the point a, and the center of the battery pack surface, i.e., the point B, are shown, and the temperature difference of the battery pack is represented sequentially from bottom to top by a curve: a discharge current 3A; a discharge current 5A; discharge current 7.5A; discharge current 10A.
Fig. 5 shows a lithium iron phosphate battery pack provided with a sodium polyacrylate hydrogel, wherein during continuous constant current discharge, different current intensities are obtained, the center of the battery pack in fig. 1, namely, the point a, and the center of the surface of the battery pack, namely, the point B, are represented in sequence from bottom to top, and the temperature difference of the battery pack is represented by the following curves: a discharge current 3A; a discharge current 5A; discharge current 7.5A; discharge current 10A.
Detailed Description
The invention is further described below with reference to the test procedure and the accompanying drawings.
In the continuous constant-current charge and discharge test, two test groups are arranged, one is a lithium iron phosphate battery pack at ambient temperature, and the other is the lithium iron phosphate battery pack filled with the sodium polyacrylate hydrogel.
The cell thickness of the battery used in the test was 8mm, and the hydrogel thickness was half of that of the cell according to [ 0007 ], which is 4 mm.
Then, according to [ 0014 ], constant-current charging is firstly carried out on two groups of lithium iron phosphate battery packs of 4S1P 3Ah, the battery packs are charged at 1C, the voltage in the constant-current charging stage is 4.2V until the current reaches C/36, and the balancing time is 1 h.
And then, carrying out a continuous constant-current discharge test on the lithium iron phosphate battery pack at the ambient temperature, wherein 4 groups of tests are set in total, and the discharge currents are respectively set to be 3A, 5A, 7.5A and 10A.
Then, according to [ 0015 ], during the discharge, the initial temperature was between 22.5 ℃ and 23.5 ℃, and the discharge cutoff voltage of each battery was set to 3V.
Then, according to [ 0016 ], during the discharging process, two K-type thermocouples are connected to the lithium iron phosphate battery pack to measure the temperature, one thermocouple is placed at the center of the battery pack, i.e., the point a, and the other thermocouple is placed at the center of the surface of the battery pack, i.e., the point B, as shown in fig. 1.
Then, according to [ 0017 ], no rest time is set between the charge and discharge processes within one cycle or between two consecutive cycles.
Then, according to [ 0018 ], the maximum charging current was set to 7.5A (2.5C).
Then, according to [ 0019 ], a cut-off temperature of 75 ℃ was used during the experiment for safety reasons.
Then, according to [ 0033 ] - [ 0041 ], a continuous constant current discharge test was performed on the lithium iron phosphate battery pack filled with the sodium polyacrylate hydrogel.
According to fig. 2 and 3, the temperature of the lithium iron phosphate battery at ambient temperature reached 45 ℃ at the end of discharge at a discharge current of 3A, which is higher than the recommended operating temperature range and may even reach 77 ℃ at 10A.
According to the lithium iron phosphate battery pack with the sodium polyacrylate hydrogel shown in fig. 2 and 3, when the discharge current is 3A and 5A respectively, the highest temperature at the center of the battery pack is lower than 35 ℃; when the discharge currents are 7.5A and 10A, respectively, the maximum temperature is also around 45 c, which is unlikely to result in poor performance, rapid loss, or thermal runaway.
As shown in fig. 4 and 5, the temperatures at the same designated points a and B in the two battery packs differ at different continuous discharge current intensities. When the discharge current is 7.5A, the temperature difference of the lithium iron phosphate battery pack filled with the sodium polyacrylate hydrogel is 4.5 ℃ when the discharge is finished, and the temperature difference is 11.8 ℃ at the ambient temperature. At other discharge current levels, it is clear that the temperature difference generally increases with increasing discharge current, but decreases significantly when sodium polyacrylate hydrogel is used in the battery.
According to [ 0043 ] -0045 ], the sodium polyacrylate hydrogel thermal management system has an obvious improvement effect on heat dissipation of the battery pack in the continuous constant-current discharge test process.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (7)
1. The utility model provides a passive heat dissipation processing apparatus based on sodium polyacrylate hydrogel, includes the outer frame of group battery, lithium iron phosphate group battery and fills the sodium polyacrylate hydrogel in the middle of frame and group battery, its characterized in that, is filled with sodium polyacrylate hydrogel between the monolithic battery of group battery.
2. The passive heat dissipation processing device based on sodium polyacrylate hydrogel of claim 1, wherein in the passive heat dissipation processing device, the external frame of the battery pack is 304 stainless steel casing, the top end of the external frame is opened, the battery is assembled, and after the sodium polyacrylate hydrogel is filled, the opened side of the frame is sealed by 304 stainless steel casing.
3. The passive heat dissipation processing device based on sodium polyacrylate hydrogel as claimed in claim 1, wherein lithium battery square cells are arranged in the heat dissipation processing device, the distance between the square cells is half of the thickness of the cells, sodium polyacrylate particles are arranged in the gaps, and finally deionized water is injected to form the hydrogel.
4. The passive heat dissipation treatment device of claim 3, wherein a 1L beaker is used to inject deionized water along one side of the opening of the device, and the volume of the injected deionized water can be calculated by the following formula:
the ionic water is directly injected into the battery module with the uniformly distributed sodium polyacrylate particles to obtain the experimental hydrogel TMS, and the solid hydrogel is formed immediately due to the high hygroscopicity of the sodium polyacrylate.
5. The passive heat dissipation treatment device of claim 1, wherein the sodium polyacrylate hydrogel has a resistivity value greater than 10 μm cm sufficient to withstand an electric field in the battery.
6. The passive heat dissipation treatment device based on sodium polyacrylate hydrogel as claimed in claim 1, wherein sodium polyacrylate hydrogel is disposed on both outer sides of the battery pack.
7. The passive heat dissipation treatment device based on sodium polyacrylate hydrogel as claimed in claim 1, wherein two K-type thermocouples are connected to the external frame and the battery pack to measure temperature, one thermocouple is placed at the center of the battery pack, and the other thermocouple is placed at the center of the surface of the battery pack.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100028758A1 (en) * | 2008-08-04 | 2010-02-04 | Eaves Stephen S | Suppression of battery thermal runaway |
| CN106935933A (en) * | 2017-04-12 | 2017-07-07 | 厦门金龙联合汽车工业有限公司 | A kind of preparation technology for strengthening the hydrogel of battery modules radiating |
| CN106953137A (en) * | 2017-04-12 | 2017-07-14 | 厦门金龙联合汽车工业有限公司 | A kind of method of utilization hydrogel enhancing battery modules radiating |
| CN109943002A (en) * | 2019-04-02 | 2019-06-28 | 武汉大学 | It is a kind of from moisture absorption hydrogel, preparation method and based on its thermal management algorithm |
| CN110498937A (en) * | 2019-08-09 | 2019-11-26 | 上海第二工业大学 | A kind of high heat conductive insulating elastomer thermal interface material and preparation method thereof of netted spider silk filling hydrogel |
-
2020
- 2020-06-23 CN CN202010579613.0A patent/CN111864298A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100028758A1 (en) * | 2008-08-04 | 2010-02-04 | Eaves Stephen S | Suppression of battery thermal runaway |
| CN106935933A (en) * | 2017-04-12 | 2017-07-07 | 厦门金龙联合汽车工业有限公司 | A kind of preparation technology for strengthening the hydrogel of battery modules radiating |
| CN106953137A (en) * | 2017-04-12 | 2017-07-14 | 厦门金龙联合汽车工业有限公司 | A kind of method of utilization hydrogel enhancing battery modules radiating |
| CN109943002A (en) * | 2019-04-02 | 2019-06-28 | 武汉大学 | It is a kind of from moisture absorption hydrogel, preparation method and based on its thermal management algorithm |
| CN110498937A (en) * | 2019-08-09 | 2019-11-26 | 上海第二工业大学 | A kind of high heat conductive insulating elastomer thermal interface material and preparation method thereof of netted spider silk filling hydrogel |
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Application publication date: 20201030 |