CN113410540A - Power battery module cooling system - Google Patents
Power battery module cooling system Download PDFInfo
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- CN113410540A CN113410540A CN202110537842.0A CN202110537842A CN113410540A CN 113410540 A CN113410540 A CN 113410540A CN 202110537842 A CN202110537842 A CN 202110537842A CN 113410540 A CN113410540 A CN 113410540A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—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
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6552—Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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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
- H01M10/6567—Liquids
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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
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6572—Peltier elements or thermoelectric devices
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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
Abstract
The invention discloses a power battery module heat dissipation system, which comprises: the battery module comprises a shell and a plurality of battery cell units, wherein the battery cell units are placed in a containing cavity, each battery cell unit is connected in series or in parallel to form a group and is packaged and molded by the shell, the heat dissipation assembly comprises a plurality of transverse heat pipes arranged in an array and a plurality of longitudinal heat pipes arranged in an array, each transverse heat pipe and each longitudinal heat pipe are combined to form a mounting area, the battery module is mounted in the mounting area, heat dissipation working media are arranged in each transverse heat pipe and each longitudinal heat pipe, the transverse heat pipes are connected with the water-cooling heat dissipation module, heat inside the battery module and near an electrode in the charging and discharging process is quickly transferred to the bottom of the battery module through the longitudinal heat pipes and then is transferred to the water-cooling heat dissipation module through the transverse heat pipes for heat dissipation, the problem of heat accumulation inside the battery module is effectively solved, and the temperatures near the side wall and the electrode of the battery module are reduced, the temperature uniformity and the heat dissipation efficiency of the battery module are improved.
Description
Technical Field
The invention relates to the technical field of heat dissipation of lithium ion power batteries, in particular to a heat dissipation system of a power battery module.
Background
With the increasing exhaustion of fossil energy and the deterioration of ecological environment, energy and environmental crisis have become common challenges facing countries in the world today. The lithium ion power battery is the first choice of the green and environment-friendly battery, and has been popularized and applied in a plurality of fields such as electric vehicles, energy storage systems, mobile electronic devices and the like due to the advantages of high efficiency, high energy density, long cycle life and the like. However, the lithium ion battery has very strict requirements on temperature, and the performance of the battery is seriously attenuated even if the temperature is too high, and even safety accidents such as thermal runaway of the battery and the like occur.
At present, most of the heat dissipation of the power battery module generally uses an air-cooling or water-cooling heat dissipation system. The air-cooled heat dissipation system enables air to sweep across the battery pack in a passive or active mode to take away heat, so that the purpose of dissipating heat of the battery pack is achieved. The air cooling heat management system has the advantages of simple structure and low cost, but the application of the air cooling heat management system in a high-power and high-capacity battery pack is hindered due to the low heat transfer coefficient of forced air convection. The liquid heat management system realizes heat dissipation or preheating of the power battery module by means of convection heat exchange of liquid with high heat conductivity coefficient. The water-cooling heat dissipation system generally only acts on the side surface or the bottom surface of the power battery module, so that the heat dissipation energy consumption is high, the temperature uniformity of the surface of the power battery module is also influenced, and the local overheating phenomenon is easily caused. Therefore, it is necessary to design and develop a high-efficiency and safe battery heat dissipation system, so that the battery can be always maintained in a proper temperature range in a high-temperature environment or in a charge and discharge process, the temperature consistency is ensured, and the occurrence and spread of a thermal runaway accident of the battery are prevented.
Disclosure of Invention
The present invention is directed to at least one of the problems of the prior art, and provides a heat dissipation system for a power battery module.
According to a first aspect of the present invention, there is provided a heat dissipation system for a power battery module, including: the battery module comprises a shell and a plurality of battery cell units, wherein the shell is provided with a containing cavity, each battery cell unit is arranged in the containing cavity and is connected in series or in parallel to form a group, the shell is packaged and molded, the heat dissipation component comprises a plurality of transverse heat pipes arranged in arrays and a plurality of longitudinal heat pipes arranged in arrays, each transverse heat pipe and each longitudinal heat pipe are combined to form a mounting area, the battery module is installed in the mounting area, each transverse heat pipe and each longitudinal heat pipe are internally provided with a heat dissipation working medium, and one end of each transverse heat pipe is connected with the water-cooling heat dissipation module.
Has the advantages that: this power battery module cooling system includes: the battery module comprises a shell and a plurality of cell units, wherein the shell is provided with a containing cavity, each cell unit is placed in the containing cavity, each cell unit is connected in series or in parallel to form a group and is packaged and molded by the shell, the heat dissipation component comprises a plurality of transverse heat pipes arranged in arrays and a plurality of longitudinal heat pipes arranged in arrays, each transverse heat pipe and each longitudinal heat pipe are combined to form a mounting area, the battery module is mounted in the mounting area, heat dissipation working media are arranged in each transverse heat pipe and each longitudinal heat pipe, one end of each transverse heat pipe is connected with the water-cooling heat dissipation module, a large amount of heat inside the battery module and near an electrode in the charging and discharging process is quickly transferred to the bottom of the battery module through the longitudinal heat pipes and then is transferred to the water-cooling heat dissipation module through the transverse heat pipes for heat dissipation, and the problem of heat accumulation inside the battery module is effectively solved, the temperature near the side wall and the electrode of the battery module is reduced, and the temperature uniformity and the heat dissipation efficiency of the battery module are improved.
According to the power battery module heat dissipation system in the embodiment of the first aspect of the present invention, the heat dissipation assembly further includes an aluminum substrate, and the transverse heat pipe and the longitudinal heat pipe are fixedly installed on the aluminum substrate.
According to the power battery module heat dissipation system in the embodiment of the first aspect of the invention, the transverse heat pipe comprises a first evaporation section and a first condensation section, the first evaporation section is attached to the bottom of the shell, the first condensation section extends out of the shell, and the first condensation section is connected with the water-cooling heat dissipation module.
According to the heat dissipation system for the power battery module in the embodiment of the first aspect of the present invention, the upper surface of the aluminum substrate is provided with a first transverse channel arranged along the length direction of the aluminum substrate, and the transverse heat pipe is arranged in the first transverse channel.
According to the power battery module heat dissipation system in the embodiment of the first aspect of the invention, the power battery module heat dissipation system further comprises a water-cooling heat dissipation module, and the first condensation section is connected with the water-cooling heat dissipation module.
According to the power battery module heat dissipation system provided by the embodiment of the first aspect of the invention, the water-cooling heat dissipation module is a water-cooling block, the width of the water-cooling block is consistent with the length of the first condensation section, a snake-shaped flow channel is arranged inside the water-cooling block, a water inlet and a water outlet are arranged on one side of the water-cooling block, and the water-cooling block is attached to the surface of the transverse heat pipe.
According to the power battery module heat dissipation system provided by the embodiment of the first aspect of the invention, the water-cooling heat dissipation module is formed by combining the semiconductor chilling plate and the water-cooling block, the semiconductor chilling plate and the water-cooling block are connected to a power supply through a lead, and the cooling surface of the semiconductor chilling plate and the water-cooling block is attached to the surface of the transverse heat pipe.
According to the heat dissipation system for the power battery module in the embodiment of the first aspect of the invention, the longitudinal heat pipe is L-shaped, the longitudinal heat pipe comprises a second evaporation section and a second condensation section, the second evaporation section is vertically arranged along the shell, and the second condensation section is horizontally arranged.
According to the heat dissipation system for the power battery module in the embodiment of the first aspect of the present invention, the lower surface of the aluminum substrate is provided with a second transverse channel arranged along the width direction of the aluminum substrate, the housing is provided with a longitudinal channel, the second evaporation section is arranged in the longitudinal channel, and the second condensation section is located in the second transverse channel.
According to the heat dissipation system of the power battery module in the embodiment of the first aspect of the invention, the transverse heat pipe and the longitudinal heat pipe are made of metal or alloy, and the heat dissipation working medium is one or a mixture of methanol, ethanol, acetone, deionized water and ammonia.
According to the power battery module heat dissipation system in the embodiment of the first aspect of the present invention, a heat conduction layer is disposed between adjacent cell units, between adjacent cell units and the inner wall of the casing, and the heat conduction layer is any one of a phase change heat conduction material, a heat conduction glue, a heat conduction silica gel, a heat conduction paste and a heat conduction silica gel sheet.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
fig. 1 is a schematic structural diagram of a heat dissipation system of a power battery module according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a heat dissipation assembly according to an embodiment of the present invention;
FIG. 3 is a graph showing the temperature rise of the surface of a battery module using a conventional bottom water-cooled plate heat dissipation method under a 1C-rate discharge condition;
fig. 4 is a graph showing a temperature rise of a surface of a battery module using a water-cooling block heat dissipation manner of a heat dissipation assembly under a 1C-rate discharge condition;
fig. 5 is a graph showing a temperature rise of a surface of a battery module in a heat dissipation manner of a semiconductor cooling plate and an external water cooling block using a heat dissipation assembly under a 1C-rate discharge condition;
fig. 6 is a comparison graph of the maximum temperature rise and the maximum surface temperature difference after the discharge of the battery module is finished in different heat dissipation modes.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 and 2, a power battery module heat dissipation system includes: a battery module 100, a heat sink 200 and a water-cooling heat sink module 300.
The battery module 100 includes a housing 110 and a plurality of cell units 120, the housing 110 is formed with a containing cavity 111, each cell unit 120 is placed in the containing cavity 111, each cell unit 120 is grouped by series connection or parallel connection, and is encapsulated and molded by the housing 110, and a heat conduction layer 130 is arranged between a contact surface between each cell unit 120, each cell unit 120 and an inner wall of the housing 110.
The heat dissipation assembly 200 includes a plurality of transverse heat pipes 210 arranged in an array, a plurality of longitudinal heat pipes 220 arranged in an array, and an aluminum substrate 230. The transverse heat pipe 210, the longitudinal heat pipe 220 and the aluminum substrate 230 are integrally welded by brazing filler metal. Each transverse heat pipe 210 and each longitudinal heat pipe 220 are combined to form a mounting area, the battery module 100 is mounted in the mounting area, heat dissipation working media are arranged in each transverse heat pipe 210 and each longitudinal heat pipe 220, and the transverse heat pipes 210 and the longitudinal heat pipes 220 are welded, mounted and fixed through an aluminum substrate 230. The use of the three-dimensional heat pipe array can rapidly transfer heat at the position of the battery module 100 close to the electrode and at the side surface to the outside of the battery module 100 for heat dissipation, and can effectively improve the temperature uniformity of the whole surface of the battery module 100. And the three-dimensional heat pipe array can be designed according to the overall dimension of the battery module 100, and an integrated welding forming process is adopted, so that the difficulty and the cost of production, manufacturing and installation are low, and the mass production and application are facilitated.
The heat dissipation assembly 200 is formed as a three-dimensional array of heat pipes. The longitudinal heat pipe 220 is formed by bending and flattening heat pipes with a diameter of phi 6mm, wherein the bending radius is 9mm, and the flattening thickness is 3 mm. The longitudinal heat pipe 220 is L-shaped, the longitudinal heat pipe 220 includes a second evaporation section 221 and a second condensation section 222, the second evaporation section 221 is vertically disposed along the casing 110, and the second condensation section 222 is horizontally disposed. The length of the second evaporation section 221 corresponds to the height of the cell unit 120.
The lower surface of the aluminum base plate 230 is provided with a second transverse channel 232 arranged along the width direction of the aluminum base plate 230, the housing 110 is provided with a longitudinal channel 112, the second evaporation section 221 is arranged in the longitudinal channel 112, and the second condensation section 222 is positioned in the second transverse channel 232.
The transverse heat pipe 210 is horizontally disposed for use, the transverse heat pipe 210 includes a first evaporation section 211 and a first condensation section 212, the first evaporation section 211 is attached to the bottom of the casing 110, and the first condensation section 212 extends out of the casing 110. In order to increase the contact area with the bottom surface of the battery module 100, the heat pipe having a diameter of 8mm is manufactured through a flattening process, the flattened thickness is 5mm, and the first evaporation section 211 is located outside the battery module 100 and has a length of 100 mm. The first condensation section 212 is connected with the water-cooled heat dissipation module 300.
In the process of charging and discharging the battery module 100, heat on the side wall of the battery module 100 and near the electrode is continuously transferred to the transverse heat pipe 210 at the bottom of the battery module 100 through the longitudinal heat pipe 220, and then forced convection heat transfer is performed through the water-cooling heat dissipation module 300 connected with the first condensation section 212 of the transverse heat pipe 210.
In order to reduce the overall weight of the heat dissipation system, the thickness of the aluminum substrate 230 is 8mm, a first transverse channel 231 having the same width as the transverse heat pipe 210 is machined on the upper surface of the aluminum substrate 230, a second transverse channel 232 having the same width as the longitudinal heat pipe 220 and arranged along the width direction of the aluminum substrate 230 is arranged on the lower surface of the aluminum substrate 230, and a surface nickel plating process is performed to facilitate subsequent welding and forming.
In order to ensure the reliability of the heat pipe array of the heat dissipation assembly 200 under high temperature conditions, the surfaces of the longitudinal heat pipes 220 and the transverse heat pipes 210 are uniformly coated with medium temperature tin solder with a melting point of 183 ℃, the medium temperature tin solder is placed in a channel processed by the aluminum substrate 230, and the heat pipe array is fixedly clamped by using a fastening clamp, so that the heat pipes are prevented from generating thermal expansion deformation under high temperature conditions to influence the welding effect. And (3) keeping the temperature of the material to be welded in a high-temperature oven at 200 ℃ for 10min, taking out, cooling in air, and welding and forming.
It is easily understood that one end of the transverse heat pipe 210 is connected to the water-cooled heat dissipation module 300. Specifically, the first condensation section 212 is connected with the water-cooled heat dissipation module 300.
The water-cooling heat dissipation module 300 is a water-cooling block. The water cooling block is made of an aluminum alloy material, a snake-shaped flow channel is machined inside the water cooling block, the width of the water cooling block is consistent with the length of the first condensation section 212, a water inlet and a water outlet are formed in one side of the water cooling block, and the water inlet and the water outlet are formed in the same side. The water cooling block is attached to the surface of the transverse heat pipe 210. The water-cooling piece is arranged in battery module 100's outside, and the size of water-cooling piece is less, runs through the water-cooling board radiating mode with the tradition and compares, has reduced traditional bottom water-cooling board and can appear leaking and then cause the risk of battery short circuit.
The water-cooling heat dissipation module 300 is a semiconductor chilling plate composite water-cooling block, and the whole size is slightly larger than the width of the transverse heat pipe. The compound water-cooling piece of semiconductor refrigeration piece includes semiconductor refrigeration piece and water-cooling piece, and the semiconductor refrigeration piece passes through the wire and inserts the power, and the cooling surface and the laminating in horizontal heat pipe 210 surface of semiconductor refrigeration piece, the face of generating heat and the laminating of water-cooling piece of semiconductor refrigeration piece carry out quick heat dissipation. The semiconductor refrigeration piece composite water cooling block is cooled by using the Peltier effect, the maximum refrigeration power of a single piece is 60W, the number of the parallel connection use is determined according to the heat production power of the battery module 100, and the auxiliary direct current power supply supplies power. The cooling surface of the semiconductor chilling plate is attached to the first condensing section 212 of the transverse heat pipe 210, and the heating surface is attached to the surface of the water cooling block.
The heat dissipation structure of the semiconductor cooling plate composite water cooling block can quickly dissipate a large amount of heat generated by the battery module 100 by using the peltier effect, thereby greatly improving the heat dissipation efficiency and the thermal safety of the battery module 100. Moreover, compared with the traditional arrangement mode of placing the semiconductor refrigeration pieces outside the battery module 100 and attaching the semiconductor refrigeration pieces on the surface of the battery module 100, the number of the semiconductor refrigeration pieces can be effectively reduced, and therefore heat dissipation energy consumption is reduced.
In the assembly process of the power battery module heat dissipation system, a heat conduction layer is arranged between the bottom surface of the battery module 100 and the transverse heat pipe 210, the longitudinal heat pipe 220 is embedded into the longitudinal channel 112 of the shell 110 and is fixed by using heat conduction glue, the water-cooling heat dissipation module 300 is tightly attached to the first condensation section 212 of the transverse heat pipe 210 through the heat conduction layer, heat of the side wall of the electrode of the battery module 100 in the charging and discharging process is firstly transferred to the transverse heat pipe 210 through the longitudinal heat pipe 220, and then the heat is quickly dissipated through the water-cooling heat dissipation module 300.
The materials of the transverse heat pipe 210 and the longitudinal heat pipe 220 are metals or alloys, and the heat dissipation working medium is one or a mixture of methanol, ethanol, acetone, deionized water and ammonia. The heat conduction layer 130 is any one of a phase change heat conduction material, a heat conduction glue, a heat conduction silica gel, a heat conduction paste, and a heat conduction silica gel sheet.
The first embodiment is as follows:
under the 1C discharge rate of the battery module 100, the battery surface heat dissipation effect of the invention and the traditional bottom water-cooling heat dissipation mode is researched, the battery module penetrating through a water-cooling plate is installed at the bottom to serve as a blank control group, and the power battery module heat dissipation system is used as an experimental group.
The capacity of the battery module 100 is 120Ah, the environmental temperature in the test process is 28 ℃, a constant-temperature water tank is used for continuously introducing cooling water with the water temperature of 25 ℃ into the water cooling block at the bottom, and the flow rate of the water is 100L/h. A total of 6 temperature measuring points are arranged on the surface of the battery module 100 during the test. Wherein, two electrodes, two are respectively arranged on the side surface and the bottom surface.
As shown in fig. 3, in the conventional bottom water-cooling heat dissipation manner, the temperature rise curves of the bottom surface and other surfaces of the battery module 100 are greatly different from each other, the temperature of the bottom surface tightly attached to the water-cooling block during the discharge process can be controlled within 34.5 ℃, the temperature difference between the side surface and the electrode is gradually increased during the discharge process, and the maximum temperatures at the end of the discharge process reach 37.5 ℃ and 39.6 ℃ respectively. This is because the water-cooling block at the bottom can prevent the temperature of the bottom surface of the battery module 100 from being well controlled, and the heat accumulated above the battery module 100 can be slowly conducted downward only through the case having a low thermal conductivity and the internal electrode material, which causes the uneven distribution of the surface temperature of the battery module 100.
As shown in fig. 4, in the experimental group, after the power battery heat dissipation module system of the present invention is used, both the surface temperature rise and the temperature uniformity of the battery module 100 are effectively improved, wherein the maximum temperature of the electrode surface is 38.1 ℃, compared with the traditional bottom water-cooling plate method, the temperature rise is reduced by about 1.5 ℃, the maximum temperatures of the side wall and the bottom surface are 36.2 ℃ and 34.7 ℃, meanwhile, the surface temperature uniformity of the battery module 100 is effectively improved, the use of the transverse heat pipe and the longitudinal heat pipe three-dimensional array can play a role in rapidly transferring the heat at the electrode and the heat at the side wall of the battery module 100, which is beneficial for improving the surface temperature uniformity of the battery module 100, and the reduction of the size of the water-cooling block can effectively reduce the heat dissipation energy consumption of the battery module 100.
Example two:
under the 1C discharge rate of the battery module 100, the battery surface heat dissipation effect of the power battery module heat dissipation system of the invention and the traditional bottom water-cooling heat dissipation manner was studied. The battery module that runs through the water-cooling board is installed to the bottom is as blank control group, uses the battery module cooling system of the compound water-cooling piece of semiconductor refrigeration piece as experimental group, and the cooling surface of semiconductor refrigeration piece is laminated the first condensation section to horizontal heat pipe through the heat-conducting layer, and the surface of generating heat is laminated the water-cooling piece surface through the heat-conducting layer. And (3) continuously introducing cooling water with the water temperature of 25 ℃ into the water cooling block at the bottom by using a constant-temperature water tank, wherein the water flow is 100L/H.
As shown in fig. 5, the heat dissipation mode of using the semiconductor chilling plate to compound the water cooling block at the condensation section of the three-dimensional heat pipe array shows better heat dissipation effect. Wherein the maximum temperature of the electrode is within 37 ℃, and the temperatures of the side surface and the bottom surface do not exceed 33 ℃ in the discharge process. The Peltier effect of the semiconductor refrigerating sheet is removed in the working process to exert a better refrigerating effect. The temperature rise descending range of the bottom surface of the battery module 100 close to the condensation section is more obvious, the temperature after the discharge is finished is only 31.6 ℃, and the result shows that low-temperature cooling water flow in the water cooling block can rapidly transfer heat of the heating surface of the refrigerating sheet through heat convection, and the refrigerating power of the refrigerating sheet in the using process is improved.
As shown in fig. 6, the maximum temperature and the maximum temperature difference of the surface of the battery module 100 after the discharge in different heat dissipation manners is completed, the use of the semiconductor refrigeration sheet may affect the uniformity of the surface temperature of the battery module 100, the surface temperature difference after the discharge is completed is 5.1 ℃, and the maximum temperature differences of the surface in the conventional water cooling manner and the three-dimensional heat pipe array composite water cooling manner are 5.6 ℃ and 3.7 ℃ respectively.
Experimental tests show that the power battery module heat dissipation system can effectively reduce the temperature of the surface of an electrode and improve the uniformity of the overall temperature of the module, wherein the heat dissipation mode of the three-dimensional heat pipe array composite water cooling block shows better temperature uniformity in the discharging process of the battery module 100, and the heat dissipation mode of the semiconductor cooling sheet composite water cooling block can play a better temperature control effect, but can form larger temperature difference on the surface of the battery module 100. Therefore, under the low-rate charge and discharge condition of the battery module 100, the temperature of the battery module is controlled by adopting the heat dissipation mode of the three-dimensional heat pipe array composite water cooling block, so that the battery module has the advantages of energy conservation and high efficiency. And under battery module 100 is in some abominable operating modes and high temperature condition, the heat dissipation measure that uses the compound water cooling piece of semiconductor refrigeration piece can reduce battery module surface temperature fast and delay the temperature rise speed in the short time, avoids the module high temperature and causes harm.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The utility model provides a power battery module cooling system which characterized in that includes:
the battery module comprises a shell and a plurality of battery cell units, wherein the shell is provided with an accommodating cavity, each battery cell unit is placed in the accommodating cavity, and the battery cell units are connected in series or in parallel to form a group and are packaged and molded through the shell; and
the battery module is arranged in the mounting area, and heat dissipation working media are arranged in the transverse heat pipes and the longitudinal heat pipes; and
and one end of the transverse heat pipe is connected with the water-cooling heat dissipation module.
2. The power battery module heat dissipation system of claim 1, wherein: the heat dissipation assembly further comprises an aluminum substrate, and the transverse heat pipe and the longitudinal heat pipe are fixedly installed through the aluminum substrate.
3. The power battery module heat dissipation system of claim 2, wherein: the transverse heat pipe comprises a first evaporation section and a first condensation section, the first evaporation section is attached to the bottom of the shell, the first condensation section extends out of the shell, and the first condensation section is connected with the water-cooling heat dissipation module.
4. The heat dissipation system for power battery modules as recited in claim 3, wherein: the upper surface of the aluminum substrate is provided with a first transverse channel arranged along the length direction of the aluminum substrate, and the transverse heat pipe is arranged in the first transverse channel.
5. The heat dissipation system for power battery modules as recited in claim 3, wherein: the water-cooling radiating module is a water-cooling block, the width of the water-cooling block is consistent with the length of the first condensation section, a snake-shaped flow channel is arranged inside the water-cooling block, a water inlet and a water outlet are formed in one side of the water-cooling block, and the water-cooling block is attached to the surface of the transverse heat pipe.
6. The heat dissipation system for power battery modules as recited in claim 5, wherein: the water-cooling heat dissipation module is a semiconductor refrigerating sheet composite water-cooling block, the semiconductor refrigerating sheet composite water-cooling block is connected with a power supply through a lead, and a cooling surface of the semiconductor refrigerating sheet composite water-cooling block is attached to the surface of the transverse heat pipe.
7. The power battery module heat dissipation system of claim 2, wherein: the longitudinal heat pipe is L-shaped and comprises a second evaporation section and a second condensation section, the second evaporation section is arranged along the vertical direction of the shell, and the second condensation section is arranged horizontally.
8. The heat dissipation system for power battery modules as recited in claim 7, wherein: the lower surface of the aluminum substrate is provided with a second transverse channel arranged along the width direction of the aluminum substrate, the shell is provided with a longitudinal channel, the second evaporation section is arranged in the longitudinal channel, and the second condensation section is positioned in the second transverse channel.
9. The power battery module heat dissipation system of claim 1, wherein: the materials of the transverse heat pipe and the longitudinal heat pipe are metals or alloys, and the heat dissipation working medium is one or a mixture of methanol, ethanol, acetone, deionized water and ammonia.
10. The power battery module heat dissipation system of claim 1, wherein: adjacent the electricity core unit with be provided with the heat-conducting layer between the shells inner wall, the heat-conducting layer is any one of phase change heat conduction material, heat conduction glue, heat conduction silica gel, heat conduction cream and heat conduction silica gel piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110537842.0A CN113410540B (en) | 2021-05-18 | 2021-05-18 | Power battery module cooling system |
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| CN113777473A (en) * | 2021-09-24 | 2021-12-10 | 长江存储科技有限责任公司 | Aging test system |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150244036A1 (en) * | 2014-02-25 | 2015-08-27 | Tesla Motors, Inc. | Energy storage system with heat pipe thermal management |
| WO2016197797A1 (en) * | 2016-01-04 | 2016-12-15 | 中兴通讯股份有限公司 | Battery module and base station provided with battery module |
| CN206921972U (en) * | 2017-04-27 | 2018-01-23 | 比亚迪股份有限公司 | A kind of radiator structure, thermal management device of battery and automobile |
| CN108365157A (en) * | 2018-01-18 | 2018-08-03 | 湖南三迅新能源科技有限公司 | Power battery cooling system and assembly method |
| CN108390123A (en) * | 2018-01-04 | 2018-08-10 | 福建省汽车工业集团云度新能源汽车股份有限公司 | A kind of power battery pack heat management system and automobile |
| CN209929437U (en) * | 2019-04-22 | 2020-01-10 | 天津北洋云创新能源技术开发有限公司 | Power battery is with returning type water cooling plant |
| CN110739505A (en) * | 2019-06-13 | 2020-01-31 | 赵耀华 | safe and energy-saving vertical lithium battery pack dual-mode thermal management system and method |
| CN211480101U (en) * | 2019-09-29 | 2020-09-11 | 淄博博一新能源科技发展有限公司 | Movable electricity storage box based on micro heat pipe array |
| CN111697288A (en) * | 2020-07-24 | 2020-09-22 | 广东工业大学 | Power battery thermal management system with cold and hot working condition temperature regulation function |
| CN212412130U (en) * | 2020-07-24 | 2021-01-26 | 广东工业大学 | Power battery thermal management system with cold and hot working condition temperature regulation function |
| CN212434707U (en) * | 2020-04-13 | 2021-01-29 | 淄博博一新能源科技发展有限公司 | Blade battery package thermal management system based on micro heat pipe array |
-
2021
- 2021-05-18 CN CN202110537842.0A patent/CN113410540B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150244036A1 (en) * | 2014-02-25 | 2015-08-27 | Tesla Motors, Inc. | Energy storage system with heat pipe thermal management |
| WO2016197797A1 (en) * | 2016-01-04 | 2016-12-15 | 中兴通讯股份有限公司 | Battery module and base station provided with battery module |
| CN206921972U (en) * | 2017-04-27 | 2018-01-23 | 比亚迪股份有限公司 | A kind of radiator structure, thermal management device of battery and automobile |
| CN108390123A (en) * | 2018-01-04 | 2018-08-10 | 福建省汽车工业集团云度新能源汽车股份有限公司 | A kind of power battery pack heat management system and automobile |
| CN108365157A (en) * | 2018-01-18 | 2018-08-03 | 湖南三迅新能源科技有限公司 | Power battery cooling system and assembly method |
| CN209929437U (en) * | 2019-04-22 | 2020-01-10 | 天津北洋云创新能源技术开发有限公司 | Power battery is with returning type water cooling plant |
| CN110739505A (en) * | 2019-06-13 | 2020-01-31 | 赵耀华 | safe and energy-saving vertical lithium battery pack dual-mode thermal management system and method |
| CN211480101U (en) * | 2019-09-29 | 2020-09-11 | 淄博博一新能源科技发展有限公司 | Movable electricity storage box based on micro heat pipe array |
| CN212434707U (en) * | 2020-04-13 | 2021-01-29 | 淄博博一新能源科技发展有限公司 | Blade battery package thermal management system based on micro heat pipe array |
| CN111697288A (en) * | 2020-07-24 | 2020-09-22 | 广东工业大学 | Power battery thermal management system with cold and hot working condition temperature regulation function |
| CN212412130U (en) * | 2020-07-24 | 2021-01-26 | 广东工业大学 | Power battery thermal management system with cold and hot working condition temperature regulation function |
Non-Patent Citations (1)
| Title |
|---|
| HUANG YAO ET AL: "Challenges and recent progress in thermal management with heat pipes for lithium-ion power batteries in electric vehicles", 《SCIENCE CHINA TECHNOLOGICAL SCIENCES》, vol. 64, 4 January 2021 (2021-01-04), pages 919 - 956, XP037445347, DOI: 10.1007/s11431-020-1714-1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113777473A (en) * | 2021-09-24 | 2021-12-10 | 长江存储科技有限责任公司 | Aging test system |
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