CN113764783A - Battery package thermal management system - Google Patents
Battery package thermal management system Download PDFInfo
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- CN113764783A CN113764783A CN202111073737.2A CN202111073737A CN113764783A CN 113764783 A CN113764783 A CN 113764783A CN 202111073737 A CN202111073737 A CN 202111073737A CN 113764783 A CN113764783 A CN 113764783A
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- heat transfer
- phase change
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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
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
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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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- 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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- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a battery pack heat management system, and the 3 battery pack heat management system comprises: a phase change heat transfer component and a heat exchange channel connected with the phase change heat transfer component. The phase change heat transfer assembly is arranged between the at least two battery cells and is in direct contact with the battery cells. The inside of each phase change heat transfer component is a closed pipeline, and the inside of the closed pipeline is filled with phase change media. The characteristics of high heat conduction rate and good temperature uniformity of the phase change heat transfer component are utilized, and the heat exchange performance and the temperature uniformity between the battery and the heat exchange component are greatly improved.
Description
Technical Field
The invention relates to the technical field of new energy, in particular to a battery pack heat management system.
Background
With the increasing energy density in power batteries and energy storage batteries, the market demands for quick charging of batteries are stronger and stronger. Meanwhile, in battery design, the use safety of the battery and the thermal management of the battery are considered more and more. On one hand, when the electric core is abused, a large amount of heat can be generated, the thermal runaway of the whole module is very easy to cause, even the whole power battery module is easy to cause, and therefore special safety protection is needed to be carried out on the power battery. On the other hand, as the requirement for quick charging of the battery is higher and higher, the requirement for thermal management of the battery module is higher and higher, and therefore the heat dissipation design of the battery module also needs to be optimized continuously.
In prior art, the protection between each electric core in the power battery module is only insulating basically, protecting against shock measure, and this just leads to having the potential risk of taking place thermal runaway between the electric core, arouses the thermal runaway who closes on electric core very easily when single electric core is out of control, finally leads to the inefficacy of whole battery module, battery package.
Disclosure of Invention
The invention aims to provide a battery pack thermal management system to solve the problem of failure caused by thermal runaway among battery cores in the conventional power battery module.
In order to solve the technical problem, the invention provides a battery pack heat management system, which comprises a battery cell body, a phase change heat transfer assembly and a heat exchange component, wherein:
the phase change heat transfer assembly comprises a body and a bending part, and is arranged between two or more battery cores; the body is arranged between the side surfaces of the battery cells in parallel and is in direct contact with the side surfaces of the battery cells; one side of the bending part is in direct contact with the heat exchange assembly, and the other side of the bending part is in direct contact with the side face of the battery cell.
Optionally, in the battery pack thermal management system, the heat exchange assembly includes a cooling assembly, the cooling assembly includes at least one of a natural cooling channel, a forced air cooling fin, and a liquid cooling plate, and the heat exchange assembly is in direct contact with the bent surface of the phase change heat transfer assembly. For example, a phase change heat transfer assembly includes a bend portion and a body, wherein: the body is arranged between the large side surfaces of the battery cell and is in direct contact with the large side surfaces of the battery cell; one surface of the bending part is in direct contact with the cooling assembly, and the other surface of the bending part is in direct contact with the small side surface of the battery cell; the bending part and the body are of an integrally formed structure.
Optionally, in the battery pack thermal management system, heat generated by the battery core in the charging and discharging process is transferred to the phase change heat transfer assembly through the side surface, the phase change heat transfer assembly transfers the heat to the cooling assembly through the bent portion of the phase change heat transfer assembly, and the cooling assembly is connected with a cold source outside the battery pack to further dissipate the heat to the outside of the battery pack;
the heat exchange assembly further comprises a heating assembly, and when the battery pack is heated under the low-temperature working condition, heat generated by the heating assembly is transferred to each battery core through the phase-change heat transfer assembly. For example, the bottom of the cooling assembly is provided with a heating assembly, and the surface of the heating assembly is in direct contact with the bending surface.
Optionally, in the battery pack thermal management system, heat generated by the battery core in the charging and discharging process is transferred to the phase change heat transfer assembly directly contacting with the battery core through the large side surface, the phase change heat transfer assembly transfers the heat to the cooling assembly through the bent portion of the phase change heat transfer assembly, and the cooling assembly is connected with an external cold source of the battery pack and further dissipates the heat to the outside of the battery pack;
when heating the battery pack under the low-temperature working condition, the heat generated by the heating component is uniformly transferred to the battery core through the phase-change heat transfer component.
Optionally, in the battery pack thermal management system, the internal structure of the battery pack is formed by:
the battery cell is a cuboid, the plurality of battery cells are arranged in parallel along the length direction, the side surfaces of the battery cells in the width direction are opposite in pairs to form a line of battery cell units, and the like so as to form a plurality of lines of battery cell units;
the multiple rows of the battery cell units are arranged in parallel along the width direction, and the side surfaces of every two battery cell units in the length direction are opposite. For example, the battery cells are rectangular, each line of battery cells are arranged in parallel along the length direction, and the side faces of the battery cells in the width direction are opposite to each other, so that a first line of battery cell units is formed;
the first line of battery cell units and the second line of battery cell units are arranged in parallel along the width direction, and the side surfaces of the two battery cell units in the length direction are opposite.
Optionally, in the battery pack thermal management system, the step of forming the internal structure of the battery pack by:
a phase change heat transfer assembly covers the side surfaces of a row of the cell units in the length direction;
the phase change heat transfer assemblies are arranged in parallel at intervals, and more than one line of electric cores can be arranged between the adjacent phase change heat transfer assemblies according to specific electric core heating amount and heat dissipation requirements.
Optionally, in the battery pack thermal management system, the phase change heat transfer assembly is in an "L" shape, a longer end of the phase change heat transfer assembly covers a side surface of the battery cell unit in the length direction, and a bent end of the phase change heat transfer assembly covers a side surface of the battery cell unit in the width direction, for example, a body of the phase change heat transfer assembly covers the side surface of the battery cell unit in the length direction; the bending section covers the side face of the battery cell unit in the width direction; so that the phase change heat transfer components are arranged at two sides of the cooling component at intervals in parallel.
Optionally, in the battery pack thermal management system, the step of forming the internal structure of the battery pack by:
the plurality of radiating units are arranged in a plurality of rows, and the first side surfaces of the radiating units are opposite to each other in pairs;
arranging a cooling assembly between two rows of radiating units;
the cooling assembly is respectively contacted with the bending surfaces of the phase change heat transfer assemblies arranged on the two sides of the cooling assembly, and the heat of the battery cells on the two sides can be taken away simultaneously by utilizing the heat conduction function of the phase change heat transfer assemblies. For example, the plurality of heat dissipation units are arranged in two rows, and the first side surface of the first row of heat dissipation units is opposite to the first side surface of the second row of heat dissipation units; arranging a cooling assembly between the first row of radiating units and the second row of radiating units; the cooling assembly is respectively contacted with the bending surfaces of the phase change heat transfer assemblies arranged on the two sides of the cooling assembly, and the heat of the battery cells on the two sides can be taken away simultaneously by utilizing the heat conduction function of the phase change heat transfer assemblies.
Optionally, in the battery pack thermal management system, the step of forming the internal structure of the battery pack by:
arranging the heating assembly between the two rows of radiating units; the heating assembly is used for heating the battery cell under a low-temperature working condition;
the heating component is respectively contacted with the bending surfaces of the phase change heat transfer components arranged on the two sides of the heating component, and the electric cores on the two sides can be heated simultaneously by utilizing the heat conduction effect of the phase change heat transfer components.
For example, the heating assembly is arranged between the first row of radiating units and the second row of radiating units; the heating assembly is used for heating the battery cell under a low-temperature working condition;
the heating component is respectively contacted with the bending surfaces of the phase change heat transfer components arranged on the two sides of the heating component, and the electric cores on the two sides can be heated simultaneously by utilizing the heat conduction effect of the phase change heat transfer components.
Optionally, in the battery pack thermal management system, the step of forming the internal structure of the battery pack by:
if the cooling component is a water-cooling plate, arranging a cooling water inlet and a cooling water outlet on one end surface of the water-cooling plate;
if the cooling component is a forced air cooling channel, the bent surface of the phase change heat transfer component is provided with a plurality of radiating fins, the radiating fins are arranged at the gaps of the two rows of radiating units, for example, the radiating fins are arranged at the gaps of the first row of radiating units and the second row of radiating units, and cooling air flows in from one side of the forced air cooling channel and directly contacts with the surfaces of the radiating fins.
Optionally, in the battery pack thermal management system:
one side surface of the phase change heat transfer component is a plane, the other side surface of the phase change heat transfer component is provided with an expansion structure, a closed heat transfer medium pipeline is arranged in the expansion structure, the whole surface expansion structure is in a mutually communicated honeycomb shape, and the whole pipeline is filled with the heat transfer medium through a filling opening.
In the battery pack heat management system provided by the invention, the phase change heat transfer component with high heat conductivity is directly contacted with the battery core and dissipates heat, and compared with most of simple liquid cooling or air cooling heat dissipation solutions in the current market, the battery pack heat management system has higher heat flow density and better temperature uniformity.
According to the invention, the heat dissipation of the battery core is realized through the phase change heat transfer component and the cooling component, the heating component realizes the heating of the battery core under the low-temperature working condition, the comprehensive heat management device capable of efficiently dissipating and heating the battery core is designed, the problem of the performance reduction of the battery caused by overhigh or overlow local temperature inside the battery core can be effectively reduced, and the safety and the service life of the battery are finally improved.
According to the invention, the phase change heat transfer component is arranged on the large surface of the battery cell, and even if the cooling component is not in direct contact with the large surface of the battery cell, the heat can be transferred to the cooling component by utilizing the heat superconductivity of the phase change heat transfer component; and a heating assembly is arranged for heating the battery pack under the low-temperature working condition.
Drawings
FIG. 1 is a general schematic diagram of a battery pack thermal management system using water-cooled plates in an embodiment of the invention;
FIG. 2 is a schematic view of a phase change heat transfer assembly used with a water cooled plate in a battery pack thermal management system according to an embodiment of the present invention;
FIG. 3 is a general schematic diagram of a battery pack thermal management system using forced air cooling channels in an embodiment of the invention;
FIG. 4 is a schematic view of a phase change heat transfer assembly used with a forced air cooling channel in a battery pack thermal management system according to an embodiment of the present invention;
FIG. 5 is a schematic view of a surface configuration of a phase change heat transfer component used in a battery pack thermal management system in accordance with an embodiment of the present invention;
FIG. 6 is a schematic diagram of a battery pack thermal management system according to another embodiment of the present invention;
FIG. 7 is a schematic diagram of a battery pack thermal management system according to another embodiment of the present invention;
fig. 8 is a schematic diagram of a battery pack thermal management system according to another embodiment of the invention.
Detailed Description
The invention is further elucidated with reference to the drawings in conjunction with the detailed description.
It should be noted that the components in the figures may be exaggerated and not necessarily to scale for illustrative purposes. In the figures, identical or functionally identical components are provided with the same reference symbols.
In the present invention, "disposed on …", "disposed over …" and "disposed over …" do not exclude the presence of an intermediate therebetween, unless otherwise specified. Further, "disposed on or above …" merely indicates the relative positional relationship between two components, and may also be converted to "disposed below or below …" and vice versa in certain cases, such as after reversing the product direction.
In the present invention, the embodiments are only intended to illustrate the aspects of the present invention, and should not be construed as limiting.
In the present invention, the terms "a" and "an" do not exclude the presence of a plurality of elements, unless otherwise specified.
It is further noted herein that in embodiments of the present invention, only a portion of the components or assemblies may be shown for clarity and simplicity, but those of ordinary skill in the art will appreciate that, given the teachings of the present invention, required components or assemblies may be added as needed in a particular scenario. Furthermore, features from different embodiments of the invention may be combined with each other, unless otherwise indicated. For example, a feature of the second embodiment may be substituted for a corresponding or functionally equivalent or similar feature of the first embodiment, and the resulting embodiments are likewise within the scope of the disclosure or recitation of the present application.
It is also noted herein that, within the scope of the present invention, the terms "same", "equal", and the like do not mean that the two values are absolutely equal, but allow some reasonable error, that is, the terms also encompass "substantially the same", "substantially equal". By analogy, in the present invention, the terms "perpendicular", "parallel" and the like in the directions of the tables also cover the meanings of "substantially perpendicular", "substantially parallel".
The numbering of the steps of the methods of the present invention does not limit the order of execution of the steps of the methods. Unless specifically stated, the method steps may be performed in a different order.
The following describes the battery pack thermal management system according to the present invention in further detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
The invention aims to provide a battery pack heat management system to solve the problem of failure caused by overheating among all battery cells in the conventional power battery module.
To achieve the above object, the present invention provides a battery pack thermal management system, comprising: the device comprises a plurality of battery cores, a plurality of phase change heat transfer assemblies arranged in parallel at intervals, a cooling assembly and a heating assembly; the phase change heat transfer assemblies are arranged between the sides of the battery cells, and the interior of each phase change heat transfer assembly is configured to form a closed pipeline which is filled with a heat transfer medium.
In one embodiment of the present invention, as shown in fig. 1 and 3, the thermal management system for energy storage battery pack includes: the device comprises a plurality of battery cores, a plurality of phase change heat transfer assemblies arranged in parallel at intervals, a cooling assembly and a heating assembly; the phase change heat transfer component is internally provided with a closed pipeline, and a heat transfer medium is filled in the pipeline; the cooling component can be a water cooling plate, a forced air cooling channel and the like; the heating assembly can be an electric heating film or other heating assemblies and is used for heating the battery core under the low-temperature working condition.
The connection relationship of the components is as follows: as shown in fig. 1 and 3, a plurality of battery cells are arranged inside the battery pack, and a certain distance is left between the surfaces of the adjacent battery cells. For a battery pack of a water cooling system, as shown in fig. 1, a water cooling plate is arranged at a gap between two adjacent rows of battery cells in the center of the battery pack, and a cooling water inlet and a cooling water outlet are arranged on one end surface of the water cooling plate; for the forced air cooling battery pack, as shown in fig. 3 and 4, the bent surface of the phase change heat transfer assembly is provided with a plurality of heat dissipation fins, the heat dissipation fins are arranged at the gap between two adjacent rows of battery cells in the center of the battery pack, and cooling air flows in from one side of the channel and directly contacts with the surfaces of the heat dissipation fins.
The phase change heat transfer component is arranged between the adjacent large side faces of the battery core and is in direct contact with the large side faces of the battery core, one face of the bent part of the phase change heat transfer component is in direct contact with the cooling component (the side face of the water cooling plate or the cooling air), and the other face of the bent part of the phase change heat transfer component is in direct contact with the small side face of the battery core, as shown in fig. 2 and 4, the bent part of the phase change inhibiting material radiating fin and the body are of an integrally formed structure.
As shown in fig. 1 and 3, the bottom of the cooling assembly is provided with a heating assembly, and the surface of the heating assembly is in direct contact with the bending surface of the phase change heat transfer assembly.
In one embodiment of the invention, the working principle of the energy storage battery pack thermal management system is as follows:
the battery pack comprises a battery pack, a phase-change heat transfer assembly, a cooling assembly, a battery pack external cold source and a battery pack, wherein the battery pack is provided with a plurality of battery cells, the battery cells are arranged in the battery pack, and the battery cells are arranged in the battery pack; in the same way, when the battery pack is heated under the low-temperature working condition, the heat generated by the heating assembly is uniformly transferred to the battery core through the phase-change heat transfer assembly. Because the phase change heat transfer component has extremely high heat conductivity, the whole heat resistance of the heat dissipation system is small, and the heat dissipation heat flow density is high.
The phase-change heat transfer component with high heat conductivity (10000W/m/DEG C) is used as a heat exchange structure for exchanging heat with each battery cell, and has the advantages of high heat conduction speed, high heat dissipation efficiency, uniform surface temperature and the like, so that the problem of performance reduction of the battery caused by nonuniform internal temperature and overhigh local temperature in the rapid charging and discharging process of the battery cell can be effectively reduced, and the safety and the service life of the battery are finally improved;
according to the invention, the phase change heat transfer assemblies are arranged between the side surfaces of the adjacent electric cores, and compared with the design that the heat dissipation structure is arranged at the bottom or the top of the electric core, the heat dissipation in the electric core is more uniform;
according to the invention, a heat dissipation mode combining the cooling component and the phase change heat transfer component is adopted, heat is uniformly taken away by the cooling component through the action of the phase change heat transfer component, and compared with the traditional air cooling heat dissipation mode, the distribution distance between the battery cores is greatly reduced, and the space is saved; compared with the traditional liquid cooling heat dissipation, the arrangement area of the liquid cooling plate is greatly reduced, and the design of a battery pack system is simplified;
the cooling assembly and the heating assembly are both arranged at the center of the battery pack, so that the heat dissipation or absorption of the whole battery pack is more uniform.
In one embodiment of the invention, a phase change heat transfer assembly is applied to an energy storage battery pack system containing 52 cells, and through thermal simulation:
(1) when the heating power of a single battery is 37.5W, the ambient temperature is 20 ℃, and the inlet flow is 5L/min, the highest temperature of the battery core is 37 ℃, the lowest temperature is 32 ℃, and the maximum temperature difference of the battery core can be controlled within 5 ℃;
(2) when the heating power of a single battery is 12.5W, the ambient temperature is 20 ℃, and the inlet flow is 5L/min, the highest temperature of the battery core is 25.7 ℃, the lowest temperature is 24 ℃, and the maximum temperature difference of the battery core can be controlled within 2 ℃.
The invention designs the comprehensive heat management device capable of efficiently radiating and heating the battery core, which can effectively reduce the problem of battery performance reduction caused by overhigh or overlow local temperature inside the battery core, effectively inhibit thermal runaway, and finally improve the safety and service life of the battery.
Compared with most of pure liquid cooling or air cooling heat dissipation solutions in the current market, the phase change heat transfer assembly with high heat conductivity is used for dissipating heat of the battery, so that the heat flow density is higher, and the temperature uniformity is better; the phase change heat transfer component is arranged on the large surface of the battery core, and even if the cooling component is not in direct contact with the large surface of the battery core, the heat can be conducted to the cooling component by utilizing the heat superconductivity of the phase change heat transfer component; and a heating assembly is arranged for heating the battery pack under the low-temperature working condition.
In order to make the whole battery pack simpler in process and lower in cost, one heat dissipation unit can be used as a manufacturing unit, and a plurality of heat dissipation units are arranged to form the battery pack, for example, two battery cores form one heat dissipation unit, the two battery cores are arranged in parallel along the length direction, and the side surfaces in the width direction are opposite to each other to form a first line of battery core units; the other two battery cells are arranged in parallel along the length direction, and the side surfaces of the two battery cells in the width direction are opposite to form a second row of battery cell units; the first line of battery cell units and the second line of battery cell units are arranged in parallel along the width direction, and the side surfaces of the two battery cell units in the length direction are opposite, so that the four battery cells are finally arranged to form a shape like a Chinese character 'tian'.
As shown in fig. 2 and 4, the phase change heat transfer assembly is in an "L" shape, and when the longer end portion thereof covers the side surface of the cell unit in the longitudinal direction, the shorter end portion thereof covers the side surface of the cell unit in the width direction.
As shown in fig. 1 and 3, the plurality of heat dissipation units are arranged in two rows, and the first side surface of the first row of heat dissipation units is opposite to the first side surface of the second row of heat dissipation units;
arranging a cooling assembly between the first row of radiating units and the second row of radiating units;
the cooling component is respectively contacted with the bending surfaces of the phase change heat transfer components arranged on the two sides of the cooling component, and the heat of the battery cells on the two sides can be taken away simultaneously by utilizing the heat conduction function of the phase change heat transfer components;
the cooling component can be a water cooling plate or a forced air cooling channel and the like.
As shown in fig. 1 and 2, if the cooling assembly is a water-cooling plate, a cooling water inlet and a cooling water outlet are arranged on one end surface of the water-cooling plate; as shown in fig. 4, if the cooling assembly is a forced air cooling channel, the shorter end of the phase change heat transfer assembly is provided with a plurality of heat dissipation fins, the heat dissipation fins are arranged at a gap between two adjacent rows of battery cells of the first row of heat dissipation units and the second row of heat dissipation units, and cooling air flows in from one side of the forced air cooling channel and directly contacts with the surfaces of the heat dissipation fins.
Further, the heating assembly is disposed between the heat radiating units of the first row and the heat radiating units of the second row; the heating component is an electric heating film and is used for heating the battery cell under the low-temperature working condition; the heating assembly can transmit heat to the cell units on the two sides simultaneously through direct contact with the bending sections of the phase change heat transfer assemblies on the two sides.
As shown in fig. 5, one side surface of the phase change heat transfer component is a plane, the other side surface is provided with an expansion structure, the inside of the expansion structure is provided with a closed heat transfer medium pipeline, the whole surface expansion structure is in a mutually communicated honeycomb shape, and the whole pipeline is filled with the heat transfer medium through a filling opening.
Fig. 6 is a front view of the heat dissipating unit, fig. 7 is a bottom view of the heat dissipating unit, and fig. 8 is a side view of the heat dissipating unit.
In summary, the above embodiments describe the different configurations of the thermal management system of the energy storage battery pack in detail, and it goes without saying that the present invention includes but is not limited to the configurations listed in the above embodiments, and any modifications based on the configurations provided by the above embodiments are within the scope of the present invention. One skilled in the art can take the contents of the above embodiments to take a counter-measure.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (10)
1. The utility model provides an efficient battery package thermal management system, its characterized in that, battery package thermal management system includes electric core body, phase transition heat transfer assembly and heat transfer assembly, wherein:
the phase change heat transfer component is arranged between two or more electric cores and is in surface contact with the electric cores, and meanwhile, the phase change heat transfer component is in contact with the heat exchange component.
2. The battery pack thermal management system of claim 1, wherein the heat exchange assembly comprises a cooling assembly comprising at least one of a natural cooling channel, a forced air cooled heat sink channel, a heat sink, a liquid cooled plate, and a liquid cooled conduit, the heat exchange assembly in direct contact with the phase change heat transfer assembly.
3. The battery pack thermal management system of claim 2, wherein heat generated by the battery cell during charging and discharging is transferred to the phase change heat transfer assembly, the phase change heat transfer assembly transfers the heat to the heat exchange assembly, and the heat exchange assembly is connected to a cold source outside the battery pack to further transfer the heat to the outside of the battery pack;
the heat exchange assembly further comprises a heating assembly, and when the battery pack is heated under the low-temperature working condition, heat generated by the heating assembly is transferred to the battery core through the phase-change heat transfer assembly.
4. The energy storage battery pack thermal management system of claim 1, wherein the internal structure of the battery pack is formed by:
a plurality of battery cells are arranged in parallel along the length direction to form a line of battery cell units, and the analogy is repeated to form a plurality of lines of battery cell units;
the multiple rows of the battery cell units are arranged in parallel along the other direction, and the side surfaces of every two battery cell units in the length direction are opposite.
5. The battery pack thermal management system of claim 4, wherein the step of forming the internal structure of the battery pack by:
a phase change heat transfer assembly covers the side surfaces of a row of the cell units in the length direction;
the phase change heat transfer assemblies are arranged in parallel at intervals, and more than one line of electric cores can be arranged between the adjacent phase change heat transfer assemblies according to the specific heat productivity of the electric core unit.
6. The battery pack thermal management system of claim 5, wherein the step of forming the internal structure of the battery pack by:
one part of the phase change heat transfer assembly covers the side surface of the cell unit in the length direction.
7. The energy storage battery pack thermal management system of claim 6, wherein the step of forming the internal structure of the battery pack by:
the battery cell units are arranged in multiple rows, and the first side surfaces of the battery cell units are opposite to each other in pairs;
arranging the heat exchange assembly between the two rows of the battery cell units;
the heat exchange component is respectively contacted with the surfaces of the phase change heat transfer components arranged on the two sides of the heat exchange component, and the heat of the electric core component can be taken away by utilizing the heat conduction function of the phase change heat transfer components.
8. The energy storage battery pack thermal management system of claim 7, wherein the step of forming the internal structure of the battery pack by:
arranging a heating assembly between two rows of cell units; the heating assembly is used for heating the electric core assembly;
the heating component is respectively contacted with the surfaces of the phase change heat transfer components arranged on the two sides of the heating component, and the electric core can be heated by utilizing the heat conduction effect of the phase change heat transfer components.
9. The energy storage battery pack thermal management system of claim 8, wherein the step of forming the internal structure of the battery pack by:
if the heat dissipation device is a water cooling plate, a cooling water inlet and a cooling water outlet are arranged on one end face of the water cooling plate;
if the heat dissipation device is a forced air cooling channel, the bending surface of the phase change heat transfer material assembly is provided with a plurality of heat dissipation fins, the heat dissipation fins are arranged at the gap between the two rows of heat dissipation units, and cooling air flows in from one side of the forced air cooling channel and directly contacts the surfaces of the heat dissipation fins.
10. The energy storage battery pack thermal management system of claim 1, wherein:
the surface of one side of the phase change heat transfer material component is a plane, the surface of the other side of the phase change heat transfer material component is provided with an expansion structure, a closed heat transfer medium pipeline is arranged in the expansion structure, the expansion structure on the whole surface is in a mutually communicated honeycomb shape, and the heat transfer medium fills the whole pipeline through a canning opening.
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| CN114724849A (en) * | 2022-05-18 | 2022-07-08 | 广东电网有限责任公司 | Thin film capacitor and manufacturing method thereof |
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