CN115742663A - Battery thermal management system - Google Patents
Battery thermal management system Download PDFInfo
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- CN115742663A CN115742663A CN202211198955.3A CN202211198955A CN115742663A CN 115742663 A CN115742663 A CN 115742663A CN 202211198955 A CN202211198955 A CN 202211198955A CN 115742663 A CN115742663 A CN 115742663A
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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 belongs to the technical field of electric vehicles and (or) energy storage, and relates to a battery heat management system, which comprises a compressor, a liquid cooling condenser, a throttling device, a battery heat exchanger, an electronic fan, a first four-way valve, a second four-way valve, a first water pump and a second water pump, wherein a radiator is arranged outdoors, the electronic fan is arranged on the radiator, and a battery is arranged in a battery pack; the compressor, the liquid cooling condenser, the throttling device, the battery heat exchanger and the compressor are sequentially connected to form a refrigerant circulation loop; four ports of the first four-way valve are respectively connected with a cooling liquid outlet of the battery pack, a cooling liquid inlet of the liquid cooling condenser, a cooling liquid inlet of the battery heat exchanger and a cooling liquid outlet of the radiator; four ports of the second four-way valve are respectively connected with a cooling liquid outlet of the liquid cooling condenser, an inlet of the first water pump, an inlet of the second water pump and a cooling liquid outlet of the battery heat exchanger; the outlet of the first water pump is connected with the cooling liquid inlet of the radiator, and the outlet of the second water pump is connected with the cooling liquid inlet of the battery pack.
Description
Technical Field
The invention belongs to the technical field of electric vehicles and (or) energy storage, and particularly relates to a battery thermal management system.
Background
The current thermal management of batteries for electric vehicles or for energy storage using heat pump systems has two basic operating modes, a heat pump mode and a cooling mode. The heat pump mode is that the refrigerant absorbs the heat of the external environment through the outdoor heat exchanger, then exchanges the heat to the cooling liquid through the liquid cooling condenser, and finally provides the heat for the battery pack; in the refrigeration mode, the battery pack transmits heat to a refrigerant in the battery heat exchanger through cooling liquid, and the refrigerant releases the heat to the external environment through the outdoor heat exchanger. The working temperature of the battery is ensured through the heat pump mode and the refrigeration mode of the battery heat management, and further the charging and discharging efficiency and the service life of the battery are ensured.
The existing battery thermal management of an electric vehicle or an energy storage using a heat pump system has the following defects and shortcomings: 1. an outdoor heat exchanger (or a condenser) is easy to frost in a heat pump mode, so that the heating efficiency of a system is reduced, the work of a battery is influenced, and the service life of the battery is damaged; 2. the battery heat management system has more parts, more and complex pipelines for cooling liquid and refrigerant and larger occupied space; 3. high cost and complex process.
Disclosure of Invention
The invention provides a battery thermal management system, aiming at solving the problems that the heating efficiency of the battery thermal management system is low, and the pipelines of cooling liquid and refrigerant are more and complicated in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is that the battery heat management system comprises a compressor, a liquid cooling condenser, a throttling device, a battery heat exchanger, an electronic fan, a radiator, a first four-way valve, a second four-way valve, a first water pump and a second water pump, wherein the battery is arranged in a battery pack, the radiator is arranged outdoors, and the electronic fan is arranged on the radiator; the compressor, the liquid cooling condenser, the throttling device, the battery heat exchanger and the compressor are sequentially connected to form a refrigerant circulation loop;
four ports of the first four-way valve are respectively connected with a cooling liquid outlet of the battery pack, a cooling liquid inlet of the liquid cooling condenser, a cooling liquid inlet of the battery heat exchanger and a cooling liquid outlet of the radiator; four ports of the second four-way valve are respectively connected with a cooling liquid outlet of the liquid cooling condenser, an inlet of the first water pump, an inlet of the second water pump and a cooling liquid outlet of the battery heat exchanger; the outlet of the first water pump is connected with the cooling liquid inlet of the radiator, and the outlet of the second water pump is connected with the cooling liquid inlet of the battery pack.
Preferably, the battery thermal management system further comprises a refrigerant flow channel plate and a coolant flow channel plate, wherein the refrigerant flow channel plate is used for connecting a refrigerant outlet of the liquid-cooled condenser with an inlet of the throttling device, an outlet of the throttling device is connected with a refrigerant inlet of the battery heat exchanger, and the liquid-cooled condenser, the throttling device and the battery heat exchanger are integrally assembled on the refrigerant flow channel plate; the coolant flow channel plate is used for connecting two ports corresponding to the first four-way valve with a coolant inlet of the liquid cooling condenser and a coolant inlet of the battery heat exchanger respectively, and four ports of the second four-way valve are connected with a coolant outlet of the liquid cooling condenser, an inlet of the first water pump, an inlet of the second water pump and a coolant outlet of the battery heat exchanger respectively, and the first water pump, the second water pump, the first four-way valve and the second four-way valve are assembled on the coolant flow channel plate in an integrated mode. The refrigerant side and the cooling liquid side both adopt integrated structures, the integrated structure is reasonable and compact in layout, pipelines connected among integrated parts are omitted, space is saved, production and assembly are facilitated, and cost is reduced.
Preferably, the air outlet of the compressor is connected with the refrigerant inlet of the liquid cooling condenser through a refrigerant pipe, and the refrigerant outlet of the battery heat exchanger is connected with the air inlet of the compressor through a refrigerant pipe; the cooling liquid inlet of the radiator is connected with the outlet of the first water pump through a water pipe or the cooling liquid runner plate, the cooling liquid outlet of the radiator is connected with the inlet of the first four-way valve through a water pipe or the cooling liquid runner plate, the cooling liquid outlet of the battery pack is connected with the inlet of the first four-way valve through a water pipe, and the cooling liquid inlet of the battery pack is connected with the outlet of the second water pump through a water pipe. The connection mode of the compressor, the radiator and the battery pack in the battery thermal management system is simple and reliable, the assembly of the battery thermal management system is facilitated, and the cost is low.
Preferably, a gas-liquid separator can be arranged between the battery heat exchanger and the compressor, an inlet of the gas-liquid separator is connected with a refrigerant outlet of the battery heat exchanger through the refrigerant runner plate, an outlet of the gas-liquid separator is connected with an inlet of the compressor through a refrigerant pipe, and the liquid cooling condenser, the throttling device, the battery heat exchanger and the gas-liquid separator are integrally assembled on the refrigerant runner plate. The gas-liquid separator filters liquid in the refrigerant gas, ensures that the refrigerant entering the compressor is gaseous, and prevents the liquid refrigerant from entering the compressor to cause liquid impact damage to the compressor, thereby protecting the compressor and ensuring the compression effect on the refrigerant gas.
Preferably, a liquid storage tank can be arranged between the liquid cooling condenser and the throttling device, an inlet of the liquid storage tank is connected with a refrigerant outlet of the liquid cooling condenser through the refrigerant runner plate, an outlet of the liquid storage tank is connected with an inlet of the throttling device through the refrigerant runner plate, and the liquid storage tank is also integrally assembled on the refrigerant runner plate. The refrigerant entering the throttling device is ensured to be liquid, so that bubbles generated when the refrigerant in a gas-liquid mixed state enters the throttling device are prevented from blocking an inlet of the throttling device, the efficiency is reduced, and noise is generated.
Preferably, a proportional three-way valve can be arranged between the cooling liquid outlet of the liquid cooling condenser and the second four-way valve, the cooling liquid outlet of the liquid cooling condenser is connected with the inlet of the proportional three-way valve, the first outlet of the proportional three-way valve is connected with the second four-way valve, and the second outlet of the proportional three-way valve is connected with the cooling liquid inlet of the battery heat exchanger. When the temperature of the refrigerant in the battery heat exchanger is not much different from the temperature of the external environment or higher than the temperature of the external environment, the battery heat exchanger has no way to absorb heat from the external environment through refrigerant evaporation, the battery heat management system can not realize a heat pump mode, and then the system heating can be realized through a proportional three-way valve, and the operation working conditions are as follows: the valve port to battery heat exchanger is opened to the proportion tee bend, directly gets into in the battery heat exchanger with partly coolant liquid that is heated, and the refrigerant in the battery heat exchanger just can absorb the heat of this part coolant liquid like this, through adjusting the superheat degree, guarantees that the refrigerant that comes out from the battery heat exchanger is gaseous, and all heats of this mode are all from the compressor, so the efficiency of entire system can be than low, but is favorable to adapting to extremely cold operating mode.
Further, the liquid cooling condenser is a water cooling condenser; the radiator is a fin radiator. A water-cooled condenser is selected to ensure the heat exchange effect of cooling liquid and a refrigerant, and a fin radiator is selected to ensure the heat exchange effect of the battery heat management system and outdoor heat.
Further, the first four-way valve and the second four-way valve are both electronic four-way valves, and the compressor is an electric compressor. The control and regulation of the cooling mode, the heating mode and the natural wind cooling mode of the battery thermal management system are facilitated.
Has the advantages that:
1. according to the battery thermal management system, the task that the refrigerant in a heat pump system commonly used by the electric automobile absorbs heat from the external environment through the outdoor heat exchanger is transferred to the cooling liquid in the radiator, and the cooling liquid exchanges heat with the refrigerant through the liquid cooling condenser, so that the using amount of the refrigerant in the system is greatly reduced, the cost is reduced, and the refrigerant filling time is shortened;
2. according to the battery thermal management system, the heating mode is that the cooling liquid is utilized to absorb heat from the outside through the radiator, so that the frosting phenomenon is greatly reduced; the normal use of the battery under the working conditions of low external environment temperature and high humidity is ensured, and the service life of the battery is prolonged;
3. according to the battery thermal management system, the refrigerant side and the cooling liquid side are both of integrated structures, so that a pipeline connected between integrated parts is omitted, the space is saved, and the production and the assembly are convenient;
4. according to the battery thermal management system, when the external environment temperature is not high but the battery pack has a refrigeration requirement, the battery thermal management system can enter a natural air cooling mode, the refrigerant side does not work, the battery pack is cooled in an air cooling radiator cooling liquid mode, the working time of a compressor is greatly reduced in spring and autumn, the service life of the compressor is prolonged, the energy loss is reduced, and the use cost of the product is reduced;
5. according to the battery heat management system, the conversion among the refrigeration mode, the heating mode and the natural air cooling mode of the battery heat management system can be realized by controlling the first four-way valve and the second four-way valve, so that the battery heat management system is convenient and intelligent, and has good user experience.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic illustration of the cooling mode of embodiment 1 of the battery thermal management system of the present invention;
fig. 2 is a schematic diagram of the heating mode of embodiment 1 of the battery thermal management system of the present invention;
fig. 3 is a schematic illustration of the natural wind cooling mode of embodiment 1 of the battery thermal management system of the present invention;
FIG. 4 is a schematic diagram of the cooling mode of embodiment 2 of the battery thermal management system of the present invention;
FIG. 5 is a schematic illustration of the heating mode of embodiment 2 of the battery thermal management system of the present invention;
FIG. 6 is a schematic illustration of the natural air cooling mode of embodiment 2 of the battery thermal management system of the present invention;
FIG. 7 is a schematic diagram of the cooling mode of embodiment 3 of the battery thermal management system of the present invention;
FIG. 8 is a schematic illustration of the heating mode of embodiment 3 of the battery thermal management system of the present invention;
fig. 9 is a schematic illustration of the natural wind cooling mode of embodiment 3 of the battery thermal management system of the present invention;
FIG. 10 is a schematic diagram of a first heating mode of embodiment 4 of the battery thermal management system of the present invention;
FIG. 11 is a schematic diagram of a second heating mode of embodiment 4 of the battery thermal management system of the present invention;
fig. 12 is a schematic illustration of a third heating mode of embodiment 4 of the battery thermal management system of the present invention;
in the figure: 1. the system comprises a compressor, 2, a liquid cooling condenser, 3, a throttling device, 4, a battery heat exchanger, 5, an electronic fan, 6, a radiator, 7, a first four-way valve, 8, a second four-way valve, 9, a first water pump, 10, a second water pump, 11, a battery pack, 12, a refrigerant pipe, 13, a water pipe, 14, a gas-liquid separator, 15, a liquid storage tank, 16 and a proportional three-way valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 to 3, a battery thermal management system includes a compressor 1, a liquid-cooled condenser 2, a throttling device 3, a battery heat exchanger 4, an electronic fan 5, a radiator 6, a first four-way valve 7, a second four-way valve 8, a first water pump 9, and a second water pump 10, where the battery is disposed in a battery pack 11, the radiator 6 is disposed outdoors, the radiator 6 may also be disposed indoors, the radiator 6 of this embodiment is a fin radiator, and the electronic fan 5 is disposed on the radiator 6; the compressor 1, the liquid cooling condenser 2, the throttling device 3, the battery heat exchanger 4 and the compressor 1 are sequentially connected to form a refrigerant circulation loop, the compressor 1 in the embodiment is an electric compressor, the liquid cooling condenser 2 in the embodiment is a water cooling condenser, and the throttling device 3 in the embodiment can be an electronic expansion valve or a thermal expansion valve and the like; four ports of the first four-way valve 7 are respectively connected with a cooling liquid outlet of the battery pack 11, a cooling liquid inlet of the liquid cooling condenser 2, a cooling liquid inlet of the battery heat exchanger 4 and a cooling liquid outlet of the radiator 6; four ports of the second four-way valve 8 are respectively connected with a cooling liquid outlet of the liquid cooling condenser 2, an inlet of the first water pump 9, an inlet of the second water pump 10 and a cooling liquid outlet of the battery heat exchanger 4, and the first four-way valve 7 and the second four-way valve 8 are both electronic four-way valves; the outlet of the first water pump 9 is connected with the cooling liquid inlet of the radiator 6, and the outlet of the second water pump 10 is connected with the cooling liquid inlet of the battery pack 11.
For convenience of description and understanding, in this embodiment, it is noted that four ports of the first four-way valve 7 are respectively an a port, a B port, a C port and a D port, the a port of the first four-way valve 7 is connected to the cooling liquid inlet of the battery heat exchanger 4, the B port of the first four-way valve 7 is connected to the cooling liquid outlet of the radiator 6, the C port of the first four-way valve 7 is connected to the cooling liquid outlet of the battery pack 11, and the D port of the first four-way valve 7 is connected to the cooling liquid inlet of the liquid-cooled condenser 2; note that four ports of the second four-way valve 8 are an a port, a B port, a C port and a D port, respectively, the a port of the second four-way valve 8 is connected to the coolant outlet of the battery heat exchanger 4, the B port of the second four-way valve 8 is connected to the inlet of the first water pump 9, the C port of the second four-way valve 8 is connected to the inlet of the second water pump 10, and the D port of the second four-way valve 8 is connected to the coolant outlet of the liquid-cooled condenser 2.
In order to improve the integration level of the battery thermal management system, save space, facilitate assembly, and ensure the reliability and stability of the overall structure, in this embodiment, the battery thermal management system further includes a coolant flow channel plate and a coolant flow channel plate, the coolant flow channel plate is used for connecting a coolant outlet of the liquid cooling condenser 2 with an inlet of the throttling device 3, and an outlet of the throttling device 3 with a coolant inlet of the battery heat exchanger 4, the liquid cooling condenser 2, the throttling device 3 and the battery heat exchanger 4 are integrally assembled on the coolant flow channel plate (schematically shown in the figure), that is, the coolant side adopts an integrated structure; the coolant flow channel plate is used for being connected two mouths that first cross valve 7 corresponds respectively with the coolant liquid import of liquid cooling condenser 2 and the coolant liquid import of battery heat exchanger 4, and four mouths of second cross valve 8 respectively with the coolant liquid export of liquid cooling condenser 2, the import of first water pump 9, the import of second water pump 10 and the coolant liquid exit linkage of battery heat exchanger 4, first water pump 9, second water pump 10, first cross valve 7 and the integrated assembly of second cross valve 8 are on the coolant flow channel plate (for showing in the figure), and the coolant liquid side adopts integrated form structure promptly.
In order to facilitate the connection of the compressor 1, the radiator 6 and the battery pack 11 to the battery thermal management system and ensure the reliability and stability of installation, in this embodiment, the air outlet of the compressor 1 is connected with the refrigerant inlet of the liquid cooling condenser 2 through a refrigerant pipe 12, and the refrigerant outlet of the battery heat exchanger 4 is connected with the air inlet of the compressor 1 through the refrigerant pipe 12; the cooling liquid inlet of the radiator 6 is connected with the outlet of the first water pump 9 through a water pipe 13, the cooling liquid outlet of the radiator 6 is connected with the inlet of the first four-way valve 7 through a water pipe 13, the cooling liquid outlet of the battery pack 11 is connected with the inlet of the first four-way valve 7 through a water pipe 13, and the cooling liquid inlet of the battery pack 11 is connected with the outlet of the second water pump 10 through a water pipe 13.
In order to ensure the working environment temperature of the battery, in the embodiment, when the external environment temperature is higher (for example, 20 ℃ -40 ℃), the battery thermal management system operates a cooling mode, as shown in fig. 1; when the external environment temperature is lower (for example, -30 ℃ -5 ℃), the battery thermal management system operates a heating mode, as shown in figure 2; when the outside environment temperature is appropriate (for example: 5 ℃ -20 ℃), the battery thermal management system operates in a natural wind cooling mode, as shown in fig. 3. When the external environment temperature is not high but the battery pack 11 has a refrigeration demand, the battery thermal management system can enter a natural air cooling mode, the refrigerant side does not work, the battery pack 11 is cooled by the cooling liquid of the air cooling radiator 6, the working time of the compressor 1 is greatly reduced in spring and autumn, the service life of the compressor 1 is prolonged, the energy loss is reduced, and the product use cost is reduced.
The battery thermal management system has the following operation modes:
cooling mode (when the outside ambient temperature is high, for example, 20 to 40 ℃): when the battery pack 11 has a refrigeration requirement, the battery thermal management system enters a refrigeration mode, and the system operates under the following working conditions: the first four-way valve 7 and the second four-way valve 8 operate to the positions shown in fig. 1, a refrigerant (low-temperature low-pressure gas) is pressurized by the compressor 1 (the refrigerant is high-temperature high-pressure gas) and then enters the liquid-cooled condenser 2, heat is transferred to cooling liquid of the liquid-cooled condenser 2, then the refrigerant (high-temperature high-pressure liquid) flows into the throttling device 3 to be throttled and depressurized (the refrigerant is a low-temperature low-pressure gas-liquid two-phase mixture), then the refrigerant enters the battery heat exchanger 4 to absorb heat of the cooling liquid of the battery heat exchanger 4, and the refrigerant (the refrigerant is low-temperature low-pressure gas) enters the compressor 1 to be pressurized again, so that the circulation of the refrigerant side is completed; the cooling liquid heated in the liquid-cooling condenser 2 enters a first water pump 9 through a port D and a port B of a second four-way valve 8, and enters a radiator 6 through the first water pump 9, the medium-temperature cooling liquid transfers heat to outside air under the action of flat pipes and fins of the radiator 6 and an electronic fan 5, and the cooled cooling liquid enters the liquid-cooling condenser 2 through the port B and the port D of the first four-way valve 7 to absorb heat, so that the cooling liquid can complete the task of heat dissipation in the external environment; the cooling liquid cooled in the battery heat exchanger 4 enters a second water pump 10 through an opening A and an opening C of a second four-way valve 8, then flows into a battery pack 11 through the second water pump 10 to dissipate heat of the battery pack 11, flows out of the battery pack 11 after absorbing heat, flows into the battery heat exchanger 4 through an opening C and an opening A of a first four-way valve 7 to be cooled by a refrigerant, and thus the cooling liquid completes the task of dissipating heat of the battery pack 11;
heating mode (when the outside environment temperature is low, such as-30-5 ℃): when the battery pack 11 needs heating, the battery thermal management system enters a heat pump mode, and the system operates as follows: the first four-way valve 7 and the second four-way valve 8 operate to the positions shown in fig. 2, and the circulation of the refrigerant side is the same as the refrigeration mode, which is not described again; the coolant side cycle is as follows: the cooling liquid absorbing heat in the liquid cooling condenser 2 enters a second water pump 10 through a D port and a C port of a second four-way valve 8, flows into a battery pack 11 through the second water pump 10 to heat the battery pack 11, and the cooling liquid releasing heat enters the liquid cooling condenser 2 from the battery pack 11 through the C port and the D port of a first four-way valve 7 to absorb heat, so that the cooling liquid completes the task of heating the battery pack 11; the cooled coolant in the battery heat exchanger 4 flows into a first water pump 9 through an opening A and an opening B of a second four-way valve 8 and then enters a radiator 6 through the first water pump 9, the low-temperature coolant absorbs heat from outside air through the action of flat tubes and fins in the radiator 6 and an electronic fan 5, the coolant after absorbing heat enters the battery heat exchanger 4 through the opening B and the opening A of the first four-way valve 7 and transfers the heat to a coolant, and therefore the coolant can absorb heat from the outside environment;
natural wind cooling mode (when the outside environment temperature is appropriate, for example: 5-20 ℃): when the battery pack 11 has a heat dissipation requirement and the external environment temperature is low, the battery heat management system enters a natural air cooling mode, the first four-way valve 7 and the second four-way valve 8 run to the positions shown in the figure 3, and the refrigerant side does not work; the medium temperature cooling liquid flowing out of the battery pack 11 flows through the port C and the port A of the first four-way valve 7 and then enters the battery heat exchanger 4, then flows through the port A and the port B of the second four-way valve 8 and then enters the radiator 6 through the first water pump 9, the medium temperature cooling liquid transfers heat to outside air through the action of flat pipes and fins in the radiator 6 and the electronic fan 5, the cooled cooling liquid flows into the liquid condenser 2 after passing through the port B and the port D of the first four-way valve 7 and finally flows into the battery pack 11 after entering the port D and the port C of the second four-way valve 8, and the cooling liquid absorbs heat from the battery pack 11 and then flows out, so that the task of radiating the battery is completed.
Example 2
As shown in fig. 4 to 6, in the present embodiment, the difference from embodiment 1 is that a gas-liquid separator 14 is provided between the battery heat exchanger 4 and the compressor 1, an inlet of the gas-liquid separator 14 is connected to a refrigerant outlet of the battery heat exchanger 4 through the refrigerant flow channel plate, an outlet of the gas-liquid separator 14 is connected to an inlet of the compressor 1 through a refrigerant pipe 12, and the liquid-cooling condenser 2, the throttling device 3, the battery heat exchanger 4, and the gas-liquid separator 14 are integrally assembled on the refrigerant flow channel plate (schematically shown in the figure). The gas-liquid separator filters liquid in refrigerant gas, ensures that the refrigerant entering the compressor is gaseous, prevents liquid refrigerant from entering the compressor to cause liquid impact damage to the compressor, protects the compressor and ensures the compression effect on the refrigerant gas.
Example 3
As shown in fig. 7 to 9, in this embodiment, the difference from embodiment 1 is that a liquid storage tank 15 is disposed between the liquid-cooled condenser 2 and the throttling device 3, an inlet of the liquid storage tank 15 is connected to a refrigerant outlet of the liquid-cooled condenser 2 through the refrigerant flow passage plate, an outlet of the liquid storage tank 15 is connected to an inlet of the throttling device 3 through the refrigerant flow passage plate, and the liquid storage tank 15 is also integrally assembled on the refrigerant flow passage plate (schematically shown in the figure). The refrigerant entering the throttling device is ensured to be liquid, so that bubbles generated when the refrigerant in a gas-liquid mixed state enters the throttling device are prevented from blocking an inlet of the throttling device, the efficiency is reduced, and noise is generated.
Example 4
As shown in fig. 10 to 12, in the present embodiment, a difference from embodiment 1, 2 or 3 is that a proportional three-way valve 16 is provided between the coolant outlet of the liquid-cooled condenser 2 and the second four-way valve 8, the coolant outlet of the liquid-cooled condenser 2 is connected to an inlet of the proportional three-way valve 16, a first outlet of the proportional three-way valve 16 is connected to the second four-way valve 8, and a second outlet of the proportional three-way valve 16 is connected to the coolant inlet of the battery heat exchanger 4. The proportional three-way valve 16 has the functions of feeding water at one end and discharging water at two ends, and the water discharge at two ends can be adjusted; under the extreme cold condition (for example, the ambient temperature is less than or equal to minus 30 ℃), because the refrigerant temperature is not much higher than the ambient temperature or higher than the ambient temperature, the battery heat exchanger 4 can not absorb heat from the outside through the evaporation of the refrigerant, and the battery thermal management system can not realize the heating effect through the heat pump mode, the system can be heated through the proportional three-way valve 16, and the operation conditions are as follows: the proportional three-way valve 16 is opened to a cooling liquid inlet of the battery heat exchanger 4, a part of heated cooling liquid directly enters the battery heat exchanger 4, so that the refrigerant in the battery heat exchanger 4 can absorb the heat of the part of cooling liquid, the refrigerant coming out of the battery heat exchanger 4 is ensured to be gaseous by adjusting the superheat degree, all the heat comes from the compressor 1 in the mode, the efficiency of the whole system is low, and the extreme cold working condition is ensured to be adapted.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (8)
1. A battery thermal management system, characterized by: the solar battery cooling system comprises a compressor (1), a liquid cooling condenser (2), a throttling device (3), a battery heat exchanger (4), an electronic fan (5), a radiator (6), a first four-way valve (7), a second four-way valve (8), a first water pump (9) and a second water pump (10), wherein the battery is arranged in a battery pack (11), the radiator (6) is arranged outdoors, and the electronic fan (5) is arranged on the radiator (6); the compressor (1), the liquid cooling condenser (2), the throttling device (3), the battery heat exchanger (4) and the compressor (1) are sequentially connected to form a refrigerant circulation loop;
four ports of the first four-way valve (7) are respectively connected with a cooling liquid outlet of the battery pack (11), a cooling liquid inlet of the liquid cooling condenser (2), a cooling liquid inlet of the battery heat exchanger (4) and a cooling liquid outlet of the radiator (6); four ports of the second four-way valve (8) are respectively connected with a cooling liquid outlet of the liquid cooling condenser (2), an inlet of the first water pump (9), an inlet of the second water pump (10) and a cooling liquid outlet of the battery heat exchanger (4); the outlet of the first water pump (9) is connected with the cooling liquid inlet of the radiator (6), and the outlet of the second water pump (10) is connected with the cooling liquid inlet of the battery pack (11).
2. The battery thermal management system of claim 1, wherein: the battery heat management system also comprises a refrigerant flow channel plate and a coolant flow channel plate, wherein the refrigerant flow channel plate is used for connecting a refrigerant outlet of the liquid cooling condenser (2) with an inlet of the throttling device (3), connecting an outlet of the throttling device (3) with a refrigerant inlet of the battery heat exchanger (4), and the liquid cooling condenser (2), the throttling device (3) and the battery heat exchanger (4) are integrally assembled on the refrigerant flow channel plate; the cooling liquid flow channel plate is used for connecting two ports corresponding to the first four-way valve (7) with a cooling liquid inlet of the liquid cooling condenser (2) and a cooling liquid inlet of the battery heat exchanger (4) respectively, and four ports of the second four-way valve (8) are connected with a cooling liquid outlet of the liquid cooling condenser (2), an inlet of the first water pump (9), an inlet of the second water pump (10) and a cooling liquid outlet of the battery heat exchanger (4) respectively, and the first water pump (9), the second water pump (10), the first four-way valve (7) and the second four-way valve (8) are assembled on the cooling liquid flow channel plate in an integrated mode.
3. The battery thermal management system of claim 2, wherein: the air outlet of the compressor (1) is connected with the refrigerant inlet of the liquid cooling condenser (2) through a refrigerant pipe (12), and the refrigerant outlet of the battery heat exchanger (4) is connected with the air inlet of the compressor (1) through the refrigerant pipe (12); the cooling liquid inlet of the radiator (6) is connected with the outlet of the first water pump (9) through a water pipe (13) or through the cooling liquid runner plate, the cooling liquid outlet of the radiator (6) is connected with the inlet of the first four-way valve (7) through the water pipe (13) or through the cooling liquid runner plate, the cooling liquid outlet of the battery pack (11) is connected with the inlet of the first four-way valve (7) through the water pipe (13), and the cooling liquid inlet of the battery pack (11) is connected with the outlet of the second water pump (10) through the water pipe (13).
4. The battery thermal management system of claim 3, wherein: be provided with between battery heat exchanger (4) and compressor (1) vapour and liquid separator (14), the import of vapour and liquid separator (14) is passed through the refrigerant exit linkage of refrigerant runner plate and battery heat exchanger (4), the export of vapour and liquid separator (14) is passed through the access linkage of refrigerant pipe (12) and compressor (1), liquid cooling condenser (2), throttling arrangement (3), battery heat exchanger (4) and vapour and liquid separator (14) integrated assembly are on refrigerant runner plate.
5. The battery thermal management system of claim 3, wherein: be provided with liquid storage pot (15) between liquid cooling condenser (2) and throttling arrangement (3), the import of liquid storage pot (15) is passed through the refrigerant exit linkage of refrigerant runner plate and liquid cooling condenser (2), the export of liquid storage pot (15) is passed through the refrigerant runner plate is connected with the access of throttling arrangement (3), liquid storage pot (15) also integrated assembly is on refrigerant runner plate.
6. The battery thermal management system of any of claims 1-5, wherein: be provided with proportion three-way valve (16) between the coolant liquid export of liquid cooling condenser (2) and second cross valve (8), the coolant liquid export of liquid cooling condenser (2) and the access connection of proportion three-way valve (16), the first export and the second cross valve (8) of proportion three-way valve (16) are connected, the second export of proportion three-way valve (16) and the coolant liquid access connection of battery heat exchanger (4).
7. The battery thermal management system of any of claims 1-5, wherein: the liquid cooling condenser (2) is a water cooling condenser; the radiator (6) is a fin radiator.
8. The battery thermal management system of claim 7, wherein: the first four-way valve (7) and the second four-way valve (8) are both electronic four-way valves, and the compressor (1) is an electric compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211198955.3A CN115742663A (en) | 2022-09-29 | 2022-09-29 | Battery thermal management system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211198955.3A CN115742663A (en) | 2022-09-29 | 2022-09-29 | Battery thermal management system |
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| CN115742663A true CN115742663A (en) | 2023-03-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117080625A (en) * | 2023-08-25 | 2023-11-17 | 无锡柯诺威新能源科技有限公司 | Direct-cooling battery thermal management system and control method thereof |
| CN117175051A (en) * | 2023-09-05 | 2023-12-05 | 哲弗智能系统（上海）有限公司 | Energy storage unit and thermal management system thereof |
| CN117168008A (en) * | 2023-09-04 | 2023-12-05 | 苏州黑盾环境股份有限公司 | Application of thermal fluorine technology in energy storage variable-frequency refrigeration |
-
2022
- 2022-09-29 CN CN202211198955.3A patent/CN115742663A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117080625A (en) * | 2023-08-25 | 2023-11-17 | 无锡柯诺威新能源科技有限公司 | Direct-cooling battery thermal management system and control method thereof |
| CN117168008A (en) * | 2023-09-04 | 2023-12-05 | 苏州黑盾环境股份有限公司 | Application of thermal fluorine technology in energy storage variable-frequency refrigeration |
| CN117175051A (en) * | 2023-09-05 | 2023-12-05 | 哲弗智能系统（上海）有限公司 | Energy storage unit and thermal management system thereof |
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