CN218548554U - Thermal management system of power type battery - Google Patents
Thermal management system of power type battery Download PDFInfo
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- CN218548554U CN218548554U CN202222230966.7U CN202222230966U CN218548554U CN 218548554 U CN218548554 U CN 218548554U CN 202222230966 U CN202222230966 U CN 202222230966U CN 218548554 U CN218548554 U CN 218548554U
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Abstract
The utility model discloses a heat management system of power type battery, including integrating module and cooling system, integrate the module and include electric core module, but the breathing type temperature-uniforming plate and heat conduction subassembly, but the breathing type temperature-uniforming plate interval sets up between electric core module and laminates with electric core, a plurality of electric core modules constitute electric core, heat conduction subassembly is arranged in electric core both ends and contacts with electric core, cooling system and heat conduction subassembly are connected, but the inside phase transition medium that is filled into of breathing type temperature-uniforming plate, but the breathing type temperature-uniforming plate memory after filling phase transition medium has the cavity; the breathable temperature equalization plate is expandable and compressible; the utility model greatly increases the heat dissipation area and the heat conduction efficiency of the battery core; the heat conductivity of the integrated heat conduction module is greatly improved, the control of temperature difference can be facilitated, the temperature and the temperature difference of the battery system can be controlled, the battery system can be continuously output at high power, and the heat exchange efficiency of the system is greatly improved.
Description
Technical Field
The utility model relates to a power type battery system heat management technical field, in particular to power type battery's heat management system.
Background
With the continuous development of new energy utilities, the specific energy of the lithium ion power battery is higher and higher, the specific power is higher and higher, the heat productivity is higher and higher, and particularly, the power type battery system is more prominent. In order to ensure the continuous high-power output of the power type battery system, avoid the reduction of the power performance of the whole vehicle and solve the problems of overhigh temperature and overhigh temperature rise of the power type battery system under the conditions of continuous high-rate charge and discharge and short-time ultrahigh-rate charge and discharge, the invention is urgent. Meanwhile, due to the limitation of the size of the battery cell and the packaging process of the electrode lug, the overcurrent capacity of the electrode lug of the battery cell is limited; in addition, the current carrying capacity of the module bus is limited due to space and bus soldering process limitations. If power type battery system carries out super high magnification charge-discharge, then electric core utmost point ear, busbar and electric core will produce a large amount of heats in the short time, if the heat can not derive fast and will lead to battery system to produce heat in the short time and gather, lead to high temperature to report to the police, even the person takes place the thermal safety problem. In this application scenario, higher requirements are put forward on the heat dissipation and temperature control technology of the power battery system. How to solve the problems of high-power heat conduction and thermal safety in a limited space is more prominent.
The above problems cannot be solved well by the existing battery thermal management system, for example, a thermal management device and a battery thermal management system disclosed in patent No. 202122921928.1, where the thermal management device includes: the battery pack is arranged in the circulation loop; the driving piece is arranged on the circulating loop; the liquid storage tank is arranged on the circulating loop and used for storing the anti-freezing liquid; the semiconductor refrigerating sheet is attached to the outer surface of the liquid storage box and used for heating or cooling the antifreeze in the liquid storage box; the driving part drives the heated or cooled antifreeze solution in the liquid storage tank to circulate in the circulating loop so as to cool or heat the battery pack. The heat management device does not need to be additionally provided with a refrigerant circulating loop, thereby fundamentally eliminating the risk of refrigerant leakage and being safer and more reliable; the structure of the heat management device can be effectively simplified, the manufacturing cost is greatly reduced, the structure is simple, the assembly difficulty is simplified, and the assembly efficiency is improved. To the utility model provides a power type battery system carries out super high multiplying power charge-discharge, and electric core utmost point ear, busbar and electric core will produce a large amount of heats in the short time so, if the heat can not derive fast and will lead to battery system to produce heat in the short time and gather, lead to high temperature to report to the police, and what did not take place the thermal safety problem, current technique can not obtain fine solution.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a thermal management system of power type battery, the quick heat when having solved power type battery system and carrying out super high multiplying power charge-discharge gathers and hot safety problem, and battery system is when carrying out super high multiplying power charge-discharge, and electric core utmost point ear, busbar and electric core will produce a large amount of heats in the short time, if the heat can not derive fast and will lead to battery system to produce heat in the short time and gather, lead to the high temperature to report to the police, the person takes place the heat problem even.
The utility model is realized in such a way, the heat management system of the power type battery comprises an integrated module, the integrated module comprises an electric core module, a breathable temperature-uniforming plate and a heat-conducting component, the electric core module comprises a plurality of electric cores, the breathable temperature-uniforming plate is arranged between the electric cores at intervals and is attached to the electric cores, the heat-conducting component is arranged at both ends of the electric core module and is contacted with the electric core module,
a phase change medium is filled in the breathable temperature equalization plate, and a phase change space exists in the breathable temperature equalization plate after the phase change medium is filled; the breathable temperature equalization plate is made of an expandable and compressible material.
The utility model discloses a further technical scheme is: but breathing formula temperature-uniforming plate interval sets up between the electric core and with the laminating of electric core, but breathing formula temperature-uniforming plate and the big laminating of electric core for the area of contact of breathing formula temperature-uniforming plate and electric core is the biggest as far as possible, increases the effective heat radiating area and the heat conduction efficiency of module. The breathable temperature equalization plate can be sequentially arranged in a single battery cell in the battery cell module, and a layer can be arranged every several battery cells.
The utility model discloses a further technical scheme is: according to the requirements of thermal runaway protection, insulation and voltage resistance and the like, corresponding surface treatment, such as surface insulation treatment and high-temperature-resistant coating treatment, is carried out on the breathable temperature-equalizing plate so as to increase the use function of the breathable temperature-equalizing plate. Various surface treatments are within the scope of this patent.
The utility model discloses a further technical scheme is: the breathable type temperature-uniforming plate is made of aluminum materials or stainless steel materials. According to different application scenes, the breathable temperature equalizing plate can be replaced by fireproof heat-insulating and compressible resilience materials, such as aerogel, mica and composite materials of compressible materials, polyimide and the like, so that the fireproof heat-insulating and compressible resilience performance is met. Wherein with partly breathable formula temperature-uniforming plate replace fire prevention insulating layer or/and compressible resilience layer, can not change original space size, can carry out different selections setting according to the cost. The substitution of different materials is within the scope of this patent.
The utility model discloses a further technical scheme is: the battery module may be a pouch cell, a square-shelled cell, or a cylindrical cell.
The utility model discloses a further technical scheme is: and a multi-level compression space is arranged in the breathable type temperature-uniforming plate. The cross section of the breathable temperature-equalizing plate is subjected to the 'breathable' principle and structural design. The principle of "respirable" is explained: when the temperature of the battery rises, the battery core expands when heated, so that the breathable temperature-equalizing plate is compressed, when the temperature is transmitted to the breathable temperature-equalizing plate and reaches the medium phase-change temperature, the phase change occurs in the breathable temperature-equalizing plate, the liquid medium is gasified, the pressure is generated in the breathable temperature-equalizing plate, and when the pressure of the inner cavity is greater than the pressure generated by the thermal expansion of the battery core, the breathable temperature-equalizing plate expands, so that the battery core is compressed; when the pressure of the inner cavity is smaller than the pressure generated by the thermal expansion of the battery cell, the battery cell expands to compress the breathable temperature equalizing plate; the "breathing" of the module is achieved during this regulation of the internal and external pressure imbalance. Through the breathable phase-change heat conduction and the structure innovation design, the service life of the battery cell can be greatly prolonged.
The utility model discloses a further technical scheme is: the thickness of parting bead is not equal, but the breathable formula temperature-uniforming plate passes through form the multilevel compression space after the parting bead separates, the compression space is the waist type.
The utility model discloses a further technical scheme is: the thickness of parting bead is not equal, but the breathable formula temperature-uniforming plate passes through form the multilevel compression space after the parting bead separates, the parting bead top is strip below semi-circular structure, the inside fretwork of semi-circular structure just is equipped with the support bar.
The utility model discloses a further technical scheme is: but breathing formula temperature-uniforming plate is hollow structure, and inside is equipped with a plurality of parting beads, the intensity of parting bead varies.
The utility model discloses a further technical scheme is: the strength of a plurality of parting strips varies for but the breathing temperature-uniforming plate has the multistage limit compression interval, has guaranteed the condensation segment space in the breathing temperature-uniforming plate, makes the phase change medium can not be full of whole cavity completely. It is within the scope of this patent to satisfy multiple levels of compression through different structural designs.
The utility model discloses a further technical scheme is: the heat conduction assembly comprises a busbar and a superconducting temperature equalizing plate attached to the busbar through a heat conduction insulating sheet, and the busbar is arranged at two ends of the battery cell module and is in contact with the battery cell module. The busbar contacts with the lugs at the two ends of the battery cell to carry out overcurrent and heat conduction. And whole heat-conducting component arranges the both ends of electric core in, can also play the effect of strengthening module structural strength and protection electric core.
The utility model discloses a further technical scheme is: the superconducting temperature-equalizing plate is any one of a superconducting refrigerant temperature-equalizing plate and a superconducting heat pipe temperature-equalizing plate.
The utility model discloses a further technical scheme is: the superconducting temperature-equalizing plate is used for phase change heat transfer and is provided with a cooling end.
The superconducting refrigerant temperature equalizing plate and the superconducting heat pipe temperature equalizing plate are phase-change heat transfer and have good heat conducting performance.
The utility model discloses a further technical scheme is: the superconductive refrigerant temperature equalizing plate is gravity type phase transition temperature equalizing plate, and the cooling end is generally installed on the upper strata, and if the cooling end is installed in the bottom, can reduce superconductive refrigerant plate's heat transfer capacity, can not use, consequently, the cooling end is installed and is also belonged to this patent protection scope in the lower floor. This patent demonstrates at upper strata mounting means.
The utility model discloses a further technical scheme is: the superconducting heat pipe temperature equalizing plate belongs to a non-gravity type phase change temperature equalizing plate, phase change and cooling reflux are carried out through capillary holes of a heat pipe, and a cooling end can be arranged on the upper layer or the bottom. This patent demonstrates at bottom mounting means.
The superconductive temperature-uniforming plate is attached to the busbar through the heat-conducting insulating sheet, and heat under the working condition of instantaneous large current is rapidly led out. Wherein the heat-conducting insulating sheet is a heat-conducting silica gel sheet. The heat-conducting insulating sheet can also be replaced by heat-conducting structural adhesive or heat-conducting gel and other materials with heat-conducting and insulating functions. All fall within the scope of protection of this patent.
The utility model discloses a further technical scheme is: the integrated module further comprises an end plate and a heat conduction structure integrated temperature-equalizing plate connected with the battery cell module through a heat conduction structure adhesive, the heat conduction structure integrated temperature-equalizing plate is arranged at the bottom or/and the top of the battery cell module, and the end plate is arranged at two sides of the battery cell module.
The integrated temperature-uniforming plate can also play a role in protecting and supporting the battery cell module, so that the overall structural strength of the module is improved.
The utility model discloses a further technical scheme is: the heat management system further comprises a cooling system, wherein the cooling system is arranged above or below the integrated module, and is connected with a cooling end in the heat conducting assembly.
The utility model discloses a further technical scheme is: the cooling system with it is equipped with the heat conduction insulating piece to integrate between the module.
Through the combination of the ultrahigh heat conduction integrated module and the cooling system, the power type battery system is effectively controlled in temperature.
The utility model discloses a further technical scheme is: the filling amount of the phase-change medium is 40-60% of the volume of the inner cavity of the breathable temperature-uniforming plate.
The inside of the breathable type temperature-uniforming plate is filled with a phase-change medium, such as: r1233ZD, different phase-change media can be selected according to the phase-change temperature, and the initial perfusion volume is 40% -60% of the inner cavity volume.
The utility model discloses a further technical scheme is: the superconducting uniform temperature plate is filled with a phase change medium. When the electric core is out of control, the medium in the superconductive temperature-equalizing plate and the breathable temperature-equalizing plate is changed in phase, and the medium is gasified instantly at high temperature, so that a large amount of heat is absorbed quickly, and the thermal diffusion of the battery is delayed.
Meanwhile, the utility model discloses the well integrated module cooperates with the liquid cooling system, has formed the "totally closed" module structure that multiaspect metal material wrapped up, and the metal material of parcel all has high heat conduction and phase transition instantaneous heat absorption function simultaneously, promotes battery system structure security and thermal safety greatly; even if the battery system is out of control thermally, the flame is difficult to spread to other modules or the outer side of the battery pack, and enough safe escape time is provided for passengers.
The utility model discloses a further technical scheme is: the integrated module has the functions of rapid heat conduction and rapid temperature control.
The utility model has the advantages that: when the temperature of the battery rises, the battery core is heated to expand so as to compress the breathable temperature equalizing plate, when the temperature is transmitted to the breathable temperature equalizing plate, and the temperature reaches the medium phase transition temperature, the phase transition occurs inside the breathable temperature equalizing plate, the liquid medium is gasified, the pressure is generated inside the breathable temperature equalizing plate, and when the pressure of the inner cavity is greater than the pressure generated by the thermal expansion of the battery core, the breathable temperature equalizing plate expands so as to compress the battery core; when the pressure of the inner cavity is smaller than the pressure generated by the thermal expansion of the battery cell, the battery cell expands to compress the breathable temperature equalizing plate; the breathing of the module is realized in the process of adjusting the internal and external pressure imbalance, and the service life of the battery cell is greatly prolonged; the breathable temperature-equalizing plate is attached to the battery cell, so that the heat dissipation area and the heat conduction efficiency of the battery cell are greatly increased;
the ultrahigh heat conduction integrated module has ultrahigh heat conduction and breathing functions, and can rapidly guide heat out and transmit the heat to a cooling system through the breathable temperature equalizing plates and the superconductive temperature equalizing plates on the two sides of the bus bar, so that the heat of a battery system is taken away. Meanwhile, the heat conduction performance of the integrated heat conduction module is greatly improved, the control of temperature difference can be facilitated, the control of the temperature and the temperature difference of the battery system is realized, the continuous high-power output of the battery system is ensured, the integrated module is combined with the traditional liquid cooling system, the original liquid cooling system function is expanded to the condenser function of the superconducting temperature equalizing plate, and the heat exchange efficiency of the system is greatly improved;
phase-change media are filled in the superconducting temperature-uniforming plate, when the battery core is out of control due to heat, the media in the superconducting temperature-uniforming plate and the breathable temperature-uniforming plate are subjected to phase change, and the media are instantly gasified due to high temperature, so that a large amount of heat is rapidly absorbed, and the heat diffusion of the battery is delayed;
the utility model discloses heat conduction subassembly and the breathable formula temperature-uniforming plate around the module of well integration and end plate, the integrated temperature-uniforming plate/cooling system of bottom, the cooling system of top/the integrated temperature-uniforming plate cooperation have formed the "totally closed" module structure of multiaspect metal material parcel, and the metal material of parcel all has high heat conduction and the instantaneous heat absorption function of phase transition simultaneously, promotes battery system structure security and thermal safety nature greatly; even if the battery system is out of control thermally, the flame is difficult to spread to other modules or the outer side of the battery pack, and enough safe escape time is provided for passengers.
Drawings
Fig. 1 is a schematic structural diagram of a battery module in a thermal management system of a power battery according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a battery module in a thermal management system for a power battery according to a second embodiment of the present invention;
fig. 3 is a schematic structural view illustrating a battery cell module and a breathable temperature equalization plate according to the present invention;
fig. 4 is a schematic structural view illustrating a battery cell module and a breathable temperature equalization plate according to the present invention;
fig. 5 is a schematic structural view illustrating a lamination of a cell module and a breathable temperature equalization plate provided by the present invention;
fig. 6 is a schematic structural view illustrating a lamination of a cell module and a breathable temperature equalization plate provided by the present invention;
fig. 7 is a cross-sectional view of the breathable temperature equalization plate provided by the present invention;
fig. 8 is a cross-sectional view of the breathable temperature equalization plate provided by the present invention;
fig. 9 is a schematic structural diagram of a thermal management system of a power battery according to a first embodiment of the present invention;
fig. 10 is a schematic structural diagram of a thermal management system of a power battery according to a second embodiment of the present invention.
Reference numerals: 0. the battery comprises an integrated module, a battery cell module 1, a breathable type temperature-uniforming plate 2, a heat-conducting assembly 3, a spacer bar 21, a busbar 31, a heat-conducting insulating sheet 32, a superconducting temperature-uniforming plate 33, an end plate 4, a heat-conducting structure adhesive 5, a heat-conducting structure integrated temperature-uniforming plate 6 and a cooling system 7.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
It should be noted that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are used for clarity of description only, and are not used to limit the scope of the present invention, and the relative relationship between the terms may be changed or adjusted without substantial technical changes.
The first embodiment is as follows:
fig. 1, 3-9 show a thermal management system of a power battery, the thermal management system includes an integrated module 0, the integrated module 0 includes a plurality of battery cells 1, a breathable temperature-uniforming plate 2 and a heat-conducting component 3, the battery cell module 1 includes a plurality of battery cells, the breathable temperature-uniforming plate 2 is disposed between the battery cells and attached to the battery cells, the heat-conducting component 3 is disposed at two ends of the battery cell module 1 and contacts with the battery cell module 1,
a phase-change medium is filled in the breathable temperature-uniforming plate 2, and a phase-change space exists in the breathable temperature-uniforming plate 2 after the phase-change medium is filled; the breathable temperature equalization plate 2 is made of an expandable and compressible material. Filled with phase change medium
But 2 intervals of breathing formula temperature-uniforming plate set up between the electric core module 1 and with the laminating of electric core, but breathing formula temperature-uniforming plate and the big laminating of electric core for the area of contact of breathing formula temperature-uniforming plate and electric core is the biggest as far as possible, increases the effective heat radiating area and the heat conduction efficiency of module. The breathable type temperature equalizing plate can be sequentially arranged in a single battery cell in the battery cell module, and a layer can be arranged every several battery cells.
The breathable temperature-uniforming plate is made of aluminum materials or stainless steel materials. According to the requirements of thermal runaway protection, insulation and voltage resistance and the like, corresponding surface treatment, such as surface insulation treatment and high-temperature-resistant coating treatment, is carried out on the breathable temperature-equalizing plate so as to increase the use function of the breathable temperature-equalizing plate. Wherein with partly breathable formula temperature-uniforming plate replace fire prevention insulating layer or/and compressible resilience layer, can not change original space size, can carry out different selections setting according to the cost. Various surface treatments are within the scope of this patent.
The integrated module has the functions of rapid heat conduction and rapid temperature control.
The battery module 1 may be a soft-package cell, a square-shell cell, or a cylindrical cell, as shown in fig. 3-6; the breathable temperature equalization plates may be inserted between the battery modules in a straight plate manner, or inserted between the battery modules in other manners, for example, in order to increase the contact area, the breathable temperature equalization plates may be sequentially arranged around the battery modules in an S-shaped manner.
In this embodiment, a multi-stage compression space is disposed in the breathable temperature equalization plate 2. The cross section of the breathable temperature equalizing plate is subjected to the 'breathable' principle and structural design, and two breathable pressure equalizing plates with different structures and multi-level compression spaces are provided as shown in figures 7 to 8. The principle of "respirable" is explained: when the temperature of the battery rises, the battery core expands when being heated, so that the breathable temperature-equalizing plate is compressed (the compression limit thickness of the plate is designed in a multi-level mode, the internal cavity is ensured not to be filled with a liquid phase-change medium through the design of the compression limit thickness, a condensation area is reserved, and the phase-change heat transfer efficiency of the temperature-equalizing plate is ensured); when the pressure of the inner cavity is smaller than the pressure generated by the thermal expansion of the battery cell, the battery cell expands to compress the breathable temperature equalizing plate; the "breathing" of the module is achieved during this regulation of the internal and external pressure imbalance. Through the breathable phase-change heat conduction and the structure innovation design, the service life of the battery cell can be greatly prolonged.
In this embodiment, the partition bars 21 have different thicknesses, and the breathable temperature equalization plate 2 is partitioned by the partition bars 21 to form a multi-stage compression space, which is waist-shaped, as shown in fig. 7.
As a preferred embodiment, the partition bars 21 have different thicknesses, the breathable temperature equalization plate 2 is partitioned by the partition bars to form a multi-level compression space, a semicircular structure below the partition bars is arranged above the partition bars, and the semicircular structure is hollowed out and provided with supporting strips, as shown in fig. 8.
In this embodiment, the breathable temperature equalization plate 2 is a hollow structure, and a plurality of division bars 21 are disposed inside the breathable temperature equalization plate, and the division bars 21 have different strengths.
The strengths of the plurality of parting strips are different, so that the breathable temperature-uniforming plate has a multi-level limit compression interval, the space of a condensation section in the breathable temperature-uniforming plate is ensured, and a phase-change (refrigerant) medium can not be completely filled in the whole cavity. It is within the scope of this patent to satisfy multiple levels of compression through different structural designs.
In this embodiment, the heat conducting assembly 3 includes a bus bar 31 and a superconducting uniform temperature plate 33 attached to the bus bar 31 via a heat conducting insulation sheet 32, and the bus bar 31 is disposed at two ends of the cell module and contacts with the cell module. The busbar contacts with the pole lugs at two ends of the battery cell to perform overcurrent and heat conduction. And whole heat-conducting component arranges the both ends of electric core in, can also play the effect of strengthening module structural strength and protection electric core.
In this embodiment, the superconducting temperature equalizing plate 33 is a superconducting refrigerant temperature equalizing plate. As shown in fig. 1.
In this embodiment, the superconducting refrigerant temperature-uniforming plate is a phase-change heat transfer plate and is provided with a cooling end.
The superconducting refrigerant temperature equalizing plate and the superconducting heat pipe temperature equalizing plate are phase-change heat transfer and have good heat conducting performance.
The superconducting refrigerant temperature-equalizing plate is a gravity type phase-change temperature-equalizing plate, and the cooling end is generally arranged on the upper layer, so that the cooling system connected with the superconducting temperature-equalizing plate in the embodiment is preferably arranged above the battery cell; if the cooling end is installed at the bottom, the heat transfer capacity of the superconducting refrigerant plate is reduced, and the superconducting refrigerant plate cannot be used, so that the cooling end is installed at the lower layer, which also belongs to the protection scope of the patent. This patent demonstrates at upper strata mounting means.
The superconductive temperature-equalizing plate is attached to the busbar through the heat-conducting insulating sheet, and heat under the working condition of instantaneous large current is rapidly led out. Wherein the heat conduction insulating sheet is a heat conduction silica gel sheet. The heat-conducting insulating sheet can also be replaced by heat-conducting structural adhesive or heat-conducting gel and other materials with heat-conducting and insulating functions. All fall within the scope of protection of this patent.
In this embodiment, integrate module 0 still include end plate 4 and glue 5 through heat conduction structure with heat conduction structure integration temperature-uniforming plate 6 that electric core module is connected, heat conduction structure integration temperature-uniforming plate 6 arranges in the bottom or/and the top of electric core module, end plate 4 arranges in the both sides of electric core module.
The integrated temperature-equalizing plate can also play a role in protecting and supporting the battery cell module, so that the overall structural strength of the module is improved.
As a preferred embodiment, the thermal management system further includes a cooling system 7, the cooling system 7 is disposed above the integrated module 0, and the cooling system 7 is connected to the cooling end of the heat conducting assembly 3.
In this embodiment, a heat-conducting insulating sheet 32 is disposed between the cooling system 7 and the integrated module 0.
Through the combination of the ultrahigh heat conduction integrated module and the cooling system, the power type battery system is effectively controlled in temperature.
In this embodiment, the perfusion amount of the phase-change medium is 40% to 60% of the volume of the inner cavity of the breathable temperature equalization plate 2.
The inside of the breathable type temperature-uniforming plate is filled with a phase-change medium, such as: r1233ZD, different phase-change media can be selected according to the phase-change temperature, and the initial perfusion volume is 40% -60% of the inner cavity volume.
The superconducting uniform temperature plate is filled with a phase change medium. When the battery core is out of control thermally, the medium in the superconducting temperature-uniforming plate and the breathable temperature-uniforming plate is subjected to phase change, and the medium is gasified instantly at high temperature, so that a large amount of heat is absorbed quickly, and the thermal diffusion of the battery is delayed.
Meanwhile, the utility model discloses the well integrated module cooperates with the liquid cooling system, has formed the "totally closed" module structure of multiaspect metallic material parcel, and the metallic material of parcel all has high heat conduction and phase transition instantaneous heat absorption function simultaneously, promotes battery system structure security and thermal safety nature greatly; even if the battery system is out of control due to heat, the flame is difficult to spread to other modules or the outer side of the battery pack, and enough safe escaping time is provided for passengers.
Example two:
figures 2-8 and 10 show a thermal management system for a power cell,
the heat management system comprises an integrated module 0, the integrated module 0 comprises a battery cell module 1, a breathable temperature-uniforming plate 2 and a heat-conducting component 3, the battery cell module 1 comprises a plurality of battery cells, the breathable temperature-uniforming plates 2 are arranged between the battery cells at intervals and are attached to the battery cells, the heat-conducting component 3 is arranged at two ends of the battery cell module 1 and is in contact with the battery cell module 1,
a phase-change medium is filled in the breathable temperature-uniforming plate 2, and a phase-change space exists in the breathable temperature-uniforming plate 2 after the phase-change medium is filled; the breathable temperature equalization plate 2 is made of an expandable and compressible material. Filled with phase change medium
But 2 intervals of breathing formula temperature-uniforming plate set up between the electric core module 1 and with the laminating of electric core, but breathing formula temperature-uniforming plate and the big laminating of electric core for the area of contact of breathing formula temperature-uniforming plate and electric core is the biggest as far as possible, increases the effective heat radiating area and the heat conduction efficiency of module. The breathable temperature equalization plate can be sequentially arranged in a single battery cell in the battery cell module, and a layer can be arranged every several battery cells.
The breathable temperature-uniforming plate is made of aluminum materials or stainless steel materials. According to the requirements of thermal runaway protection, insulation and voltage resistance and the like, corresponding surface treatment, such as surface insulation treatment and high-temperature-resistant coating treatment, is carried out on the breathable temperature-equalizing plate so as to increase the use function of the breathable temperature-equalizing plate. Wherein with partly breathable formula temperature-uniforming plate replace fire prevention insulating layer or/and compressible resilience layer, can not change original space size, can carry out different selection settings according to the cost. Various surface treatments are within the scope of this patent.
The integrated module has the functions of rapid heat conduction and rapid temperature control.
The battery module 1 may be a soft-package cell, a square-shell cell, or a cylindrical cell, as shown in fig. 3-6; the breathable temperature equalization plates can be inserted between the battery modules in the form of straight plates or inserted between the battery modules in other forms, for example, in order to increase the contact area, the breathable temperature equalization plates can be arranged around the battery modules in an S-shaped manner.
In this embodiment, a multi-stage compression space is disposed in the breathable temperature equalization plate 2. The cross section of the breathable temperature equalizing plate is subjected to the 'breathable' principle and structural design, and two breathable pressure equalizing plates with different structures and multi-level compression spaces are provided as shown in figures 7 to 8. The principle of "respirable" is explained: when the temperature of the battery rises, the battery core expands when being heated, so that the breathable type temperature-uniforming plate is compressed (the compression limit thickness of the plate is designed in a multi-level mode, the design of the compression limit thickness is adopted to ensure that an internal cavity cannot be filled with a liquid phase-change medium, so that a condensation area is reserved, and the phase-change heat transfer efficiency of the temperature-uniforming plate is ensured). When the temperature is transferred to the breathable type temperature-uniforming plate and reaches the medium phase-change temperature, the phase change occurs in the breathable type temperature-uniforming plate, the liquid medium is gasified, the pressure is generated in the breathable type temperature-uniforming plate, and when the pressure of the internal cavity is greater than the pressure generated by the thermal expansion of the battery core, the breathable type temperature-uniforming plate expands to compress the battery core; when the pressure of the inner cavity is smaller than the pressure generated by the thermal expansion of the battery core, the battery core expands to compress the breathable type temperature-uniforming plate; the "breathing" of the module is achieved during this regulation of the internal and external pressure imbalance. Through the breathing phase change heat conduction and the structure innovation design, the service life of the battery cell can be greatly prolonged.
In this embodiment, the partition bars 21 have different thicknesses, and the breathable temperature equalization plate 2 is partitioned by the partition bars 21 to form a multi-stage compression space cavity, where the compression space is waist-shaped, as shown in fig. 7.
As a preferred embodiment, the partition bars 21 have different thicknesses, the breathable temperature equalization plate 2 is partitioned by the partition bars to form a multi-level compression space, a semicircular structure below the partition bars is arranged above the partition bars, and the semicircular structure is hollowed and provided with support bars, as shown in fig. 8.
In this embodiment, the breathable temperature equalization plate 2 is a hollow structure, and a plurality of division bars 21 are disposed inside the breathable temperature equalization plate, and the division bars 21 have different strengths.
The strengths of the plurality of parting strips are different, so that the breathable temperature-uniforming plate has a multi-level limit compression interval, the space of a condensation section in the breathable temperature-uniforming plate is ensured, and a phase-change (refrigerant) medium can not be completely filled in the whole cavity. It is within the scope of this patent to satisfy the multi-stage compression through different structural designs.
In this embodiment, the heat conducting assembly 3 includes a bus bar 31, and a superconducting uniform temperature plate 33 attached to the bus bar 31 through a heat conducting insulating sheet 32, where the bus bar 31 is disposed at two ends of the cell module and contacts with the cell module. The busbar contacts with the lugs at two ends of the battery cell to conduct overcurrent heat conduction. And whole heat-conducting component arranges the both ends of electric core in, can also play the effect of strengthening module structural strength and protection electric core.
In this embodiment, the superconducting temperature equalizing plate 33 is a superconducting heat pipe temperature equalizing plate. As shown in fig. 2.
In this embodiment, the superconducting uniform temperature plate 33 is phase-change heat transfer and is provided with a cooling end.
The superconducting refrigerant temperature-equalizing plate and the superconducting heat pipe temperature-equalizing plate are phase-change heat transfer and have good heat-conducting performance.
The superconducting heat pipe temperature equalizing plate belongs to a non-gravity type phase change temperature equalizing plate, phase change and cooling reflux are carried out through capillary holes of a heat pipe, and a cooling end can be arranged on the upper layer or the bottom. This embodiment is shown in a bottom mounted manner as shown in fig. 10.
The superconductive temperature-equalizing plate is attached to the busbar through the heat-conducting insulating sheet, and heat under the working condition of instantaneous large current is rapidly led out. Wherein the heat conduction insulating sheet is a heat conduction silica gel sheet. The heat-conducting insulating sheet can also be replaced by heat-conducting structural adhesive or heat-conducting gel and other materials with heat-conducting and insulating functions. All fall within the scope of protection of this patent.
As a preferred embodiment, the integrated module 0 further includes an end plate 4 and a heat-conducting structure-integrated temperature-uniforming plate 6 connected to the cell module through a heat-conducting structure adhesive 5, the heat-conducting structure-integrated temperature-uniforming plate 6 is disposed at the bottom or/and top of the cell module, and the end plate 4 is disposed at both sides of the cell module.
The integrated temperature-equalizing plate can also play a role in protecting and supporting the battery cell module.
As a preferred embodiment, the thermal management system further includes a cooling system 7, the cooling system 7 is disposed below the integrated module 0, and the cooling system 7 is connected to the cooling end of the heat conducting assembly 3.
In this embodiment, a heat-conducting insulating sheet 32 is disposed between the cooling system 7 and the integrated module 0.
Through the combination of the ultrahigh heat conduction integrated module and the cooling system, the power type battery system is effectively controlled in temperature.
In this embodiment, the perfusion amount of the phase-change medium is 40% to 60% of the volume of the inner cavity of the breathable temperature equalization plate 2.
The breathable temperature-uniforming plate is internally filled with a phase-change medium, such as: r1233ZD, can choose different phase change mediums according to the phase change temperature, the initial perfusion volume is 40% -60% of the lumen volume.
The superconducting uniform temperature plate is filled with a phase change medium. When the electric core is out of control, the medium in the superconductive temperature-equalizing plate and the breathable temperature-equalizing plate is changed in phase, and the medium is gasified instantly at high temperature, so that a large amount of heat is absorbed quickly, and the thermal diffusion of the battery is delayed.
Meanwhile, the utility model discloses the well integrated module cooperates with the liquid cooling system, has formed the "totally closed" module structure of multiaspect metallic material parcel, and the metallic material of parcel all has high heat conduction and phase transition instantaneous heat absorption function simultaneously, promotes battery system structure security and thermal safety nature greatly; even if the battery system is out of control thermally, the flame is difficult to spread to other modules or the outer side of the battery pack, and enough safe escape time is provided for passengers.
According to different application scenes, the breathable temperature equalization plate can be replaced by fireproof heat insulation and compressible resilience materials, such as aerogel, mica and composite materials of compressible materials (foaming silica gel and PU foam surface), polyimide and other materials, and the fireproof heat insulation and compressible resilience performance is met. The substitution of different materials is within the scope of this patent.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (10)
1. A thermal management system for a power cell, comprising: the heat management system comprises an integrated module (0), the integrated module (0) comprises electric core modules (1), breathable uniform temperature plates (2) and heat conducting components (3), the electric core modules (1) comprise a plurality of electric cores, the breathable uniform temperature plates (2) are arranged among the electric cores at intervals and are attached to the electric cores, the heat conducting components (3) are arranged at two ends of the electric core modules (1) and are in contact with the electric core modules (1),
the phase-change medium is filled in the breathable temperature-uniforming plate (2), and a phase-change space exists in the breathable temperature-uniforming plate (2) after the phase-change medium is filled; the breathable temperature equalization plate (2) is made of an expandable and compressible material.
2. The thermal management system for power cells according to claim 1, wherein said breathable temperature equalization plate (2) is provided with a plurality of compression spaces.
3. The thermal management system of a power battery according to claim 2, wherein the breathable temperature-uniforming plate (2) is a hollow structure and is internally provided with a plurality of spacers (21), and the spacers (21) separate the breathable temperature-uniforming plate (2) into the multi-stage compression spaces.
4. The thermal management system of a power battery according to any of claims 1 to 3, wherein the heat conducting assembly (3) comprises a busbar (31), and a superconducting soaking plate (33) attached to the busbar (31) through a heat conducting insulating sheet (32), wherein the busbar (31) is disposed at two ends of the cell module (1) and is in contact with the cell module (1).
5. The thermal management system of the power battery as claimed in claim 4, wherein the superconducting temperature-equalizing plate (33) is one of a superconducting refrigerant temperature-equalizing plate and a superconducting heat pipe temperature-equalizing plate.
6. The thermal management system of a power battery according to claim 4, wherein the superconducting soaking plate (33) is phase change heat transfer and is provided with a cooling end.
7. The thermal management system of the power battery according to any one of claims 1 to 3, wherein the integrated module (0) further comprises an end plate (4) and a heat-conducting structure-integrated temperature equalization plate (6) connected with the cell module (1) through a heat-conducting structure adhesive (5), the heat-conducting structure-integrated temperature equalization plate (6) is disposed at the bottom or/and the top of the cell module (1), and the end plate (4) is disposed at two sides of the cell module (1).
8. A thermal management system for power cells according to any of claims 1 to 3, characterized in that it further comprises a cooling system (7), said cooling system (7) being placed above or below said integrated module (0), and said cooling system (7) being connected to the cooling end of said heat conducting assembly (3).
9. The system according to claim 8, characterized in that a thermally conductive insulating sheet (32) is provided between the cooling system (7) and the integrated module (0).
10. The thermal management system of a power cell according to any of claims 1-3, further comprising a fire-resistant thermal insulation layer or/and a compressible resilient layer between said cells.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222230966.7U CN218548554U (en) | 2022-08-24 | 2022-08-24 | Thermal management system of power type battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222230966.7U CN218548554U (en) | 2022-08-24 | 2022-08-24 | Thermal management system of power type battery |
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