CN111342164A - Battery pack thermal management system based on four-way valve and variable flow resistance type cold plate combination design - Google Patents
Battery pack thermal management system based on four-way valve and variable flow resistance type cold plate combination design Download PDFInfo
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- CN111342164A CN111342164A CN202010140853.0A CN202010140853A CN111342164A CN 111342164 A CN111342164 A CN 111342164A CN 202010140853 A CN202010140853 A CN 202010140853A CN 111342164 A CN111342164 A CN 111342164A
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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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/6554—Rods or plates
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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
- 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
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
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- 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 battery pack heat management systems, in particular to a battery pack heat management system based on a combined design of a four-way valve and a variable flow resistance type cold plate, which comprises a cooling plate; j-shaped grooves are uniformly distributed in the inner wall of the cooling plate; four-way valves are fixedly connected to two sides of the cooling plate; a first liquid storage tank liquid is arranged above the J-shaped groove and in the inner wall of the cooling plate; a condenser is fixedly connected in the inner wall of the first liquid storage tank; the valve heads at the bottoms of the two four-way valves are fixedly connected with second guide pipes; a second liquid storage tank is arranged below the J-shaped groove and in the inner wall of the cooling plate; the invention is mainly used for solving the problems that the existing battery pack cooling system mostly adopts an internal liquid cooling pipeline, the temperature of an inlet is higher than that of an outlet under the cooling working condition, the internal temperature of the battery pack is easy to be uneven, and the temperature rise of a battery core in the battery pack is too high, so that thermal runaway is easy to be caused; the overcharge and the overdischarge of the battery core are easily caused, so that the problems of safety accidents such as fire, explosion and the like are caused.
Description
Technical Field
The invention belongs to the technical field of battery pack heat management systems, and particularly relates to a battery pack heat management system based on a combined design of a four-way valve and a variable flow resistance type cold plate.
Background
With the increasing severity of energy problems and environmental problems, the country strongly supports new energy resources, and the key technology of power batteries is becoming mature, power batteries have been widely used in electric cars, electric motorcycles, electric bicycles, solar energy, mobile communication terminal products, energy storage products and other products. The battery pack is used as a main energy storage element of the new energy automobile or the hybrid electric automobile, is a key part of the new energy automobile or the hybrid electric automobile, and has important influence on the performance and the service life of the new energy automobile or the hybrid electric automobile. The battery pack in the vehicle-mounted battery pack is formed by connecting a plurality of battery monomers in series, the loading space on the vehicle is limited, the number of batteries required by the vehicle is large, and the batteries are all tightly arranged and connected; when the battery pack generates certain heat in the working process, if the battery pack cannot be well radiated and cooled and is in a high-temperature environment for a long time, the performance and the service life of the battery are seriously influenced; for the introduction of the thermal management system of the battery pack, refer to journal: wu navigation mark, design and optimization of heat management system of lithium ion battery pack, Nanchang university 2018 (12). However, there still exist certain problems in the battery pack thermal management system, including the following aspects:
(1) at present, most of battery pack cooling systems adopt internal liquid cooling pipelines, the temperature of an inlet is higher than that of an outlet in a cooling working condition, so that the internal temperature of a battery pack is easy to be uneven, meanwhile, the battery pack is charged and discharged at high multiplying power, so that a higher challenge is brought to a heat management system of the battery pack, and the temperature rise of a battery cell in the battery pack is too high, so that thermal runaway is easy to be caused; the temperature difference is too large, so that the overcharge and the overdischarge of the battery core are easily caused, and safety accidents such as fire, explosion and the like are caused. At present, a heat management system of a battery pack has low heat dissipation power, low heat dissipation efficiency and low temperature equalization power and temperature equalization efficiency.
In view of this, in order to overcome the above technical problems, the present inventors have designed and developed a battery pack thermal management system based on a four-way valve and variable flow resistance type cold plate combination design, so as to solve the above technical problems.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a battery pack thermal management system based on a combined design of a four-way valve and a variable flow resistance type cold plate, which is mainly used for solving the problems that the internal temperature of a battery pack is easily uneven because the inlet temperature is higher than the outlet temperature in the cooling working condition and the temperature rise of a battery cell in the battery pack is too high, so that thermal runaway is easily caused in the conventional battery pack cooling system; the temperature difference is too large, and the overcharge and the overdischarge of the battery core are easily caused, so that the problems of safety accidents such as fire, explosion and the like are caused.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a battery pack heat management system based on a four-way valve and variable flow resistance type cold plate combined design, which comprises a cooling plate; j-shaped grooves are uniformly distributed in the inner wall of the cooling plate; each J-shaped groove is mutually matched and communicated; four-way valves are fixedly connected to two sides of the cooling plate and are electrically connected with a controller through wires; two valve heads on the opposite sides of the two four-way valves are communicated with the J-shaped groove; the valve heads at the upper ends of the two four-way valves are fixedly connected with first guide pipes which are made of copper-aluminum alloy; a first liquid storage tank is arranged above the J-shaped groove and in the inner wall of the cooling plate, and cooling liquid is contained in the first liquid storage tank; the condenser is fixedly connected in the inner wall of the first liquid storage tank and is electrically connected with the controller through a lead; the right side of the condenser is fixedly connected with a water pump; the two first conduits are communicated with a first liquid storage tank; the valve heads at the bottoms of the two four-way valves are fixedly connected with second guide pipes which are made of copper-aluminum alloy; a second liquid storage tank is arranged below the J-shaped groove and in the inner wall of the cooling plate, and cooling liquid is contained in the second liquid storage tank; the second liquid storage tank is communicated with the rightmost J-shaped groove through the long hole; the second liquid storage tank is fixedly connected with radiators which are uniformly arranged, and the number of the radiators is three; the two second conduits are communicated with a second liquid storage tank; when the battery pack cooling device works, when the battery pack needs to be cooled, the controller controls one valve head on the four-way valve to stretch into the J-shaped groove, after the valve head is stretched, the cooling liquid in the first liquid storage tank flows into the four-way valve on the left side through the first conduit on the left side, the cooling liquid flowing into the four-way valve flows into the J-shaped groove through the stretched valve head, and the battery pack can be cooled in the process that the cooling liquid flows in the J-shaped groove, so that the temperature in the battery pack is prevented from being high, the battery is prevented from being damaged, because the J-shaped grooves are mutually matched and arranged in a staggered mode, the cooling liquid can flow in a staggered mode that the cooling liquid flows in the J-shaped groove, the battery pack can be cooled more comprehensively, when the temperature in the battery pack is overhigh, the controller controls the other valve head stretching into the J-shaped groove to stretch, in the process, the flow of the cooling liquid flowing into the J-shaped groove by the four-way valve can be improved, so that the flow of the cooling liquid in the J-shaped groove can be accelerated, the battery pack can be better cooled, when the cooling liquid in the J-shaped groove flows to the rightmost end of the cooling plate, the second liquid storage groove is communicated with the J-shaped groove through the long hole, the cooling liquid flowing through the long hole can partially flow into the second liquid storage groove, the radiator is fixedly connected in the second liquid storage groove, so that the cooling liquid flowing into the second liquid storage groove can be radiated, the temperature of the cooling liquid can be prevented from being overhigh in the process, so that the cooling effect on the battery pack is reduced, when the cooling liquid flows into the four-way valve on the right side, the controller controls the water pump in the first liquid storage groove to work, and in the process of the water pump, the cooling liquid flowing into the four-way valve on the right side can be pumped into the first, because the first pipe is made for copper aluminum alloy, the in-process that the coolant liquid flows in first pipe, the temperature of coolant liquid can be absorbed to first pipe, because the valve head of cross valve bottom has linked firmly the second pipe, and the second pipe communicates with the second reservoir, when the in-process of water pump work, can be with the coolant liquid suction that flows into in the second reservoir in the first reservoir to this circulation.
Preferably, the two sides of the first liquid storage tank are fixedly connected with a first liquid storage tank in the inner wall of the cooling plate, and the first liquid storage tank is filled with high-purity ethanol; the two first liquid storage tanks partially extend into the first liquid storage tanks; the two first guide pipes extend into the first liquid storage tank; one side of each first guide pipe extending into the first liquid storage tank is fixedly connected with a threaded pipe; the other ends of the two threaded pipes extend out of the first liquid storage tank and are communicated with the first liquid storage tank; the during operation, when the coolant liquid in the first pipe is through first liquid reserve tank, because screwed pipe and first pipe intercommunication in the first liquid reserve tank, the coolant liquid in the first single pipe can flow in the screwed pipe, because high-purity ethanol is equipped with in the first liquid reserve tank, thereby can cool down the coolant liquid of convection through the screwed pipe, thereby can further improve the cooling effect to the coolant liquid, because the screwed pipe is spiral design, thereby can increase during the contact of coolant liquid and ethanol, thereby can improve the cooling effect of ethanol to the coolant liquid, because the equal part of first cooling tank stretches into in the first liquid reserve tank, thereby can reduce the temperature of the coolant liquid in the first liquid reserve tank, because the screwed pipe opposite side all communicates with first liquid reserve tank, after the coolant liquid in the screwed pipe flows out, can directly flow in the first liquid reserve tank.
Preferably, the two first liquid storage tanks are communicated through first liquid pipes which are uniformly arranged, and the first liquid pipes are immersed in the cooling liquid; each first liquid pipe is made of a copper material; the during operation, because two first liquid reservoirs all communicate through the first liquid pipe of evenly arranging, and first intraductal ethanol that has flow equalized to can further reduce the temperature of first reservoir internal cooling liquid, because first liquid pipe is the copper product material and makes, and the copper product material has stronger cold nature of leading, can guarantee that first liquid pipe is in cold state always, thereby can be better cool down to the coolant liquid in the first reservoir.
Preferably, a second liquid storage tank is fixedly connected in the inner wall of the cooling plate below the first liquid storage tank, and the second liquid storage tank is communicated with the first liquid storage tank through a short pipe; a control valve is fixedly connected in the short pipe; the second liquid storage tanks partially extend into the first liquid storage tank; the inner walls of one sides of the second liquid storage tanks extending into the two first liquid storage tanks are fixedly connected with liquid guide pipes; first long grooves are formed in the inner wall of the cooling plate below the second liquid storage tank, and the first long grooves are communicated with the liquid guide pipe; through holes which are uniformly distributed are formed in the inner wall of the bottom of the first long groove and are communicated with the J-shaped groove; when the temperature in the battery pack is overhigh during working, the controller controls the control valve in the short pipe to be opened, when the control valve is opened, the cooling liquid in the first liquid storage tank can flow into the second liquid storage tank through the short pipe, when the cooling liquid flows into the second liquid storage tank, because the second liquid storage tank part extends into the first liquid storage tanks at two sides, the cooling liquid in the second liquid storage tank can be cooled by the ethanol in the first liquid storage tank, because the second liquid storage tank is communicated with the first long groove through the liquid guide pipe, the cooling liquid in the second liquid storage tank flows into the first long groove through the liquid guide pipe, the cooling liquid flowing into the first long groove flows into the J-shaped groove through the through holes which are uniformly distributed, in the process, the content of the cooling liquid in the J-shaped groove can be increased, and the flowing speed of the cooling liquid in the J-shaped groove can be increased, so that the temperature of the battery pack can be further reduced.
Preferably, air pumps which are uniformly arranged are fixedly connected in the inner wall of the cooling plate below the second liquid storage tank; the upper surface of each air pump is fixedly connected with an air pipe, and the bottom of each air pipe is fixedly connected with a one-way valve; each air pipe extends into the second liquid storage tank; uniformly arranged air holes are formed in the inner wall of each air pipe; the during operation, when the coolant liquid flowed into in the second reservoir, controller control air pump work this moment, at the in-process of air pump work, can take external gas into the trachea, because linked firmly the gas pocket of evenly arranging in the endotracheal wall, can pass through the even spout in the second reservoir of gas pocket with the gas in the trachea, the temperature of cooling liquid in the second reservoir can be reduced at this in-process, thereby improve the cooling liquid and to battery package cooling effect, because the check valve has all been linked firmly in every trachea, can prevent that the cooling liquid in the second reservoir from flowing out from the trachea, thereby avoid causing the unnecessary influence.
Preferably, a second long groove is formed above the second liquid storage tank and communicated with the air pipe; the inner wall of the second elongated slot is provided with uniformly distributed air grooves which are communicated with the J-shaped slot; during operation, because the trachea communicates with the second elongated slot, the gas in the trachea can directly let in the second elongated slot, and after the gas lets in the second elongated slot, can spout into "J" inslot through the air duct of evenly arranging, can blow to battery package inside at this in-process to can reduce the temperature of battery package, can also lower the temperature to the coolant liquid in "J" inslot simultaneously, thereby improve the cooling effect of coolant liquid.
The invention has the following beneficial effects:
1. by arranging the first liquid storage tank, when the cooling liquid in the first guide pipe passes through the first liquid storage tank, because the threaded pipe in the first liquid storage tank is communicated with the first guide pipe, the cooling liquid in the first single pipe can flow into the threaded pipe, because the first liquid storage tank is filled with high-purity ethanol, the cooling liquid flowing through the threaded pipe can be cooled, the cooling effect on the cooling liquid can be further improved, because the threaded pipe is designed in a spiral way, the contact time of the cooling liquid and the ethanol can be prolonged, the cooling effect of the ethanol on the cooling liquid can be improved, because the first cooling boxes partially extend into the first liquid storage tank, the temperature of the cooling liquid in the first liquid storage tank can be reduced, because the screwed pipe opposite side all communicates with first reservoir, after the coolant liquid outflow in the screwed pipe, can directly flow into first reservoir.
2. According to the invention, by arranging the air pump and the air pipes, when the cooling liquid flows into the second liquid storage tank, the controller controls the air pump to work, in the working process of the air pump, external air can be pumped into the air pipes, and because the air holes which are uniformly distributed are fixedly connected in the inner wall of the air pipe, the air in the air pipe can be uniformly sprayed into the second liquid storage tank through the air holes, in the process, the temperature of the cooling liquid in the second liquid storage tank can be reduced, so that the cooling effect of the cooling liquid on the battery pack is improved, and because the check valve is fixedly connected in each air pipe, the cooling liquid in the second liquid storage tank can be prevented from flowing out of the air pipe, so that unnecessary influence is avoided.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a body diagram of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is an enlarged view of a portion of FIG. 2 at B;
in the figure: the cooling plate 1, a 'J' -shaped groove 11, a first liquid storage tank 12, a condenser 13, a water pump 14, a first liquid storage tank 15, a threaded pipe 16, a first liquid pipe 17, a second liquid storage tank 18, a control valve 19, a liquid guide pipe 111, a first long groove 121, a through hole 131, a short pipe 141, a four-way valve 2, a first guide pipe 21, a second guide pipe 22, a second liquid storage tank 23, a long hole 24, a radiator 25, an air pump 26, an air pipe 27, a one-way valve 28, an air hole 29, a second long groove 291 and an air groove 292.
Detailed Description
A battery pack thermal management system based on a four-way valve and variable flow resistance type cold plate combination design according to an embodiment of the present invention will be described below with reference to fig. 1 to 4.
As shown in fig. 1-4, the battery pack thermal management system based on the four-way valve and variable flow resistance cold plate combination design according to the present invention includes a cooling plate 1; the inner wall of the cooling plate 1 is provided with J-shaped grooves 11 which are uniformly distributed; each J-shaped groove 11 is mutually matched and communicated; the four-way valves 2 are fixedly connected to two sides of the cooling plate 1, and the four-way valves 2 are electrically connected with the controller through wires; two valve heads on the opposite sides of the two four-way valves 2 are communicated with a J-shaped groove 11; the valve heads at the upper ends of the two four-way valves 2 are fixedly connected with first guide pipes 21, and the first guide pipes 21 are made of copper-aluminum alloy; a first liquid storage tank 12 is arranged above the J-shaped groove 11 and in the inner wall of the cooling plate 1, and cooling liquid is contained in the first liquid storage tank 12; the condenser 13 is fixedly connected in the inner wall of the first liquid storage tank 12, and the condenser 13 is electrically connected with the controller through a lead; the right side of the condenser 13 is fixedly connected with a water pump 14; both said first ducts 21 are in communication with the first reservoir 12; the valve heads at the bottoms of the two four-way valves 2 are fixedly connected with second guide pipes 22, and the second guide pipes 22 are made of copper-aluminum alloy; a second liquid storage tank 23 is arranged below the J-shaped groove 11 and in the inner wall of the cooling plate 1, and cooling liquid is contained in the second liquid storage tank 23; the second liquid storage tank 23 is communicated with the rightmost J-shaped groove 11 through a long hole 24; the second liquid storage tank 23 is fixedly connected with uniformly arranged radiators 25, and the number of the radiators 25 is three; both of the second conduits 22 are in communication with a second reservoir 23; when the battery pack cooling device works, when the battery pack is required to be cooled, the controller controls the valve head extending into the J-shaped groove 11 on the four-way valve 2 to be opened, after the valve head is opened, the cooling liquid in the first liquid storage tank 12 flows into the four-way valve 2 on the left side through the first conduit 21 on the left side, the cooling liquid flowing into the four-way valve 2 flows into the J-shaped groove 11 through the opened valve head, the battery pack can be cooled in the process that the cooling liquid flows in the J-shaped groove 11, so that the battery pack is prevented from being damaged due to high temperature, because the J-shaped grooves 11 are mutually matched and arranged in a staggered mode, the cooling liquid can flow in a staggered mode in the process that the cooling liquid flows in the J-shaped groove 11, the battery pack can be more comprehensively cooled, and when the temperature in the battery pack is too high, the controller controls the other valve head extending into the J-shaped groove to be opened, in the process, the cooling liquid flowing into the J-shaped groove 11 from the four-way valve 2 can be improved, so that the flowing of the cooling liquid in the J-shaped groove 11 can be accelerated, the battery pack can be cooled better, when the cooling liquid in the J-shaped groove 11 flows to the rightmost end of the cooling plate 1, the second liquid storage tank 23 is communicated with the J-shaped groove 11 through the long hole 24, the cooling liquid flowing through the long hole 24 can partially flow into the second liquid storage tank 23, the radiator 25 is fixedly connected in the second liquid storage tank 23, so that the cooling liquid flowing into the second liquid storage tank 23 can be radiated, the temperature of the cooling liquid can be prevented from being too high in the process, so that the cooling effect on the battery pack is reduced, when the cooling liquid flows into the four-way valve 2 on the right side, the controller controls the water pump 14 in the first liquid storage tank 12 to work at the moment, and the cooling liquid flowing into the four-way valve 2 on the right side can be pumped into the first liquid storage tank 12 from the first conduit 21, because the first pipe 21 is made of copper-aluminum alloy, the first pipe 21 can absorb the temperature of the cooling liquid in the process that the cooling liquid flows in the first pipe 21, and because the second pipe 22 is fixedly connected to the valve head at the bottom of the four-way valve 2 and the second pipe 22 is communicated with the second liquid storage tank 23, the cooling liquid flowing into the second liquid storage tank 23 can be pumped into the first liquid storage tank 12 in the process that the water pump 14 works, so that the cooling liquid circulates.
As an embodiment of the invention, the first liquid storage tanks 15 are fixedly connected in the inner wall of the cooling plate 1 at two sides of the first liquid storage tank 12, and the first liquid storage tanks 15 are filled with high-purity ethanol; the two first liquid storage tanks 15 partially extend into the first liquid storage tank 12; both the first conduits 21 extend into the first reservoir 15; one side of each of the two first guide pipes 21 extending into the first liquid storage tank 15 is fixedly connected with a threaded pipe 16; the other ends of the two threaded pipes 16 extend out of the first liquid storage tank 15 and are communicated with the first liquid storage tank 12; in operation, when the coolant in the first conduit 21 passes through the first reservoir 15, since the threaded pipe 16 in the first reservoir 15 is in communication with the first conduit 21, the coolant in the first single pipe can thus flow into the threaded pipe 16, because the first liquid storage tank 15 is filled with high-purity ethanol, the cooling liquid flowing through the threaded pipe 16 can be cooled, so that the cooling effect on the cooling liquid can be further improved, because the threaded pipe 16 is designed in a spiral way, the contact time of the cooling liquid and the ethanol can be prolonged, the cooling effect of the ethanol on the cooling liquid can be improved, since the first cooling tanks each partially extend into the first reservoir 12, the temperature of the cooling liquid in the first reservoir 12 can be lowered, because the other side of the threaded pipe 16 is communicated with the first reservoir 12, the cooling liquid in the threaded pipe 16 can directly flow into the first reservoir 12 after flowing out.
As an embodiment of the present invention, the two first liquid tanks 15 are communicated by first liquid pipes 17 which are uniformly arranged, and the first liquid pipes 17 are immersed in the cooling liquid; each of the first liquid pipes 17 is made of a copper material; the during operation, because two first liquid storages 15 all communicate through the first liquid pipe 17 of evenly arranging, and it has ethanol to flow equalize in the first liquid pipe 17 to can further reduce the temperature of the cooling liquid in first reservoir 12, because first liquid pipe 17 is the copper product and makes, and the copper product has stronger cold nature of leading, can guarantee that first liquid pipe 17 is in cold state always, thereby can be better cool down to the cooling liquid in first reservoir 12.
As an embodiment of the present invention, a second liquid storage tank 18 is fixedly connected in the inner wall of the cooling plate 1 below the first liquid storage tank 12, and the second liquid storage tank 18 is communicated with the first liquid storage tank 12 through a short pipe 141; the control valve 19 is fixedly connected in the short pipe 141; the second liquid storage tanks 18 partially extend into the first liquid storage tank 15; the inner walls of the second liquid storage tanks 18 extending into the two first liquid storage tanks 15 are fixedly connected with liquid guide pipes 111; a first long groove 121 is formed in the inner wall of the cooling plate 1 below the second liquid storage tank 18, and the first long grooves 121 are communicated with the liquid guide pipe 111; through holes 131 are uniformly arranged in the inner wall of the bottom of the first long groove 121, and the through holes 131 are communicated with the J-shaped groove 11; when the temperature in the battery pack is too high during operation, the controller controls the control valve 19 in the short pipe 141 to open, after the control valve 19 is opened, the cooling liquid in the first liquid storage tank 12 flows into the second liquid storage tank 18 through the short pipe 141, after the cooling liquid flows into the second liquid storage tank 18, the second liquid storage tank 18 partially extends into the first liquid storage tanks 15 at two sides, so that the cooling liquid in the second liquid storage tank 18 can be cooled by the ethanol in the first liquid storage tank 15, because the second liquid storage tank 18 is communicated with the first long groove 121 through the liquid guide pipe 111, the cooling liquid in the second liquid storage tank 18 flows into the first long groove 121 through the liquid guide pipe 111, the cooling liquid flowing into the first long groove 121 flows into the J-shaped groove 11 through the uniformly arranged through holes 131, the content of the cooling liquid in the J-shaped groove 11 can be increased in the process, and the flowing speed of the cooling liquid in the J-shaped groove 11 can be increased, thereby can further carry out cooling treatment to the battery package.
As an embodiment of the present invention, air pumps 26 uniformly arranged are fixedly connected in the inner wall of the cooling plate 1 below the second liquid storage tank 23; the upper surface of each air pump 26 is fixedly connected with an air pipe 27, and the bottom of each air pipe 27 is fixedly connected with a one-way valve 28; each air pipe 27 extends into the second liquid storage tank 23; air holes 29 which are uniformly distributed are formed in the inner wall of each air pipe 27; the during operation, when the coolant liquid flows into in the second reservoir 23, controller control air pump 26 work this moment, at the in-process of air pump 26 work, can be with external gas suction trachea 27 in, because linked firmly evenly arranged's gas pocket 29 in the trachea 27 inner wall, can pass through the even spraying into second reservoir 23 of gas pocket 29 with the gas in the trachea 27, can reduce the temperature of the cooling liquid in second reservoir 23 at this in-process, thereby improve the coolant liquid and to battery package cooling effect, because check valve 28 has all been linked firmly in every trachea 27, can prevent that the cooling liquid in the second reservoir 23 from flowing out from trachea 27, thereby avoid causing unnecessary influence.
As an embodiment of the present invention, a second long groove 291 is formed above the second liquid storage tank 23, and the second long groove 291 is communicated with the air pipe 27; the inner wall of the second long groove 291 is provided with uniformly arranged air grooves 292, and the air grooves 292 are communicated with the J-shaped groove 11; during operation, because the air pipe 27 is communicated with the second long groove 291, air in the air pipe 27 can be directly introduced into the second long groove 291, and after the air is introduced into the second long groove 291, the air can be sprayed into the J-shaped groove 11 through the uniformly arranged air grooves 292, and the interior of the battery pack can be blown in the process, so that the temperature of the battery pack can be reduced, meanwhile, cooling liquid in the J-shaped groove 11 can be cooled, and the cooling effect of the cooling liquid is improved.
The specific working process is as follows:
when the battery pack cooling device works, when the battery pack needs to be cooled, the controller controls a valve head on the four-way valve 2, which extends into the J-shaped groove 11, to open, after the valve head is opened, the cooling liquid in the first liquid storage tank 12 flows into the four-way valve 2 on the left side through the first conduit 21 on the left side, the cooling liquid flowing into the four-way valve 2 flows into the J-shaped groove 11 through the opened valve head, the battery pack can be cooled in the process that the cooling liquid flows in the J-shaped groove 11, when the temperature in the battery pack is overhigh, the controller controls another valve head extending into the J-shaped groove to open, in the process, the cooling liquid flowing into the J-shaped groove 11 through the four-way valve 2 can be improved, so that the flow of the cooling liquid in the J-shaped groove 11 can be accelerated, when the cooling liquid in the J-shaped groove 11 flows to the rightmost end of the cooling plate 1, because the second liquid storage tank 23 is communicated with the J-shaped groove 11 through the long hole 24, the cooling liquid flowing through the long hole 24 can partially flow into the second liquid storage tank 23, the radiator 25 is fixedly connected in the second liquid storage tank 23, so that the cooling liquid flowing into the second liquid storage tank 23 can be radiated, when the cooling liquid flows into the right four-way valve 2, the controller controls the water pump 14 in the first liquid storage tank 12 to work at the moment, the cooling liquid flowing into the right four-way valve 2 can be pumped into the first liquid storage tank 12 from the first guide pipe 21 on the right side in the working process of the water pump 14, because the first guide pipe 21 is made of copper-aluminum alloy, the first guide pipe 21 can absorb the temperature of the cooling liquid in the flowing process of the cooling liquid in the first guide pipe 21, because the second guide pipe 22 is fixedly connected on the valve head at the bottom of the four-way valve 2, and the second guide pipe 22 is communicated with the second liquid storage tank 23, in the working process of the water pump 14, the cooling liquid flowing into the second liquid storage tank 23 can be pumped into, thus circulating.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. Battery package thermal management system based on cross valve and variable flow resistance type cold drawing integrated design, its characterized in that: comprising a cooling plate (1); j-shaped grooves (11) are uniformly distributed in the inner wall of the cooling plate (1); each J-shaped groove (11) is mutually matched and communicated; the four-way valves (2) are fixedly connected to two sides of the cooling plate (1), and the four-way valves (2) are electrically connected with the controller through wires; two valve heads on the opposite sides of the two four-way valves (2) are communicated with a J-shaped groove (11); the valve heads at the upper ends of the two four-way valves (2) are fixedly connected with first guide pipes (21), and the first guide pipes (21) are made of copper-aluminum alloy; a first liquid storage tank (12) is arranged above the J-shaped groove (11) and in the inner wall of the cooling plate (1), and cooling liquid is contained in the first liquid storage tank (12); a condenser (13) is fixedly connected in the inner wall of the first liquid storage tank (12), and the condensers (13) are electrically connected with the controller through leads; the right side of the condenser (13) is fixedly connected with a water pump (14); both of the first conduits (21) are communicated with a first reservoir (12); the valve heads at the bottoms of the two four-way valves (2) are fixedly connected with second guide pipes (22), and the second guide pipes (22) are made of copper-aluminum alloy; a second liquid storage tank (23) is arranged below the J-shaped groove (11) and in the inner wall of the cooling plate (1), and cooling liquid is contained in the second liquid storage tank (23); the second liquid storage tank (23) is communicated with the rightmost J-shaped groove (11) through a long hole (24); the second liquid storage tank (23) is fixedly connected with uniformly arranged radiators (25), and the number of the radiators (25) is three; both of the second conduits (22) are in communication with a second reservoir (23).
2. The battery pack thermal management system based on the combined design of the four-way valve and the variable flow resistance cold plate according to claim 1, wherein: a first liquid storage tank (15) is fixedly connected to the two sides of the first liquid storage tank (12) in the inner wall of the cooling plate (1), and high-purity ethanol is contained in the first liquid storage tank (15); the two first liquid storage tanks (15) partially extend into the first liquid storage tank (12); the two first guide pipes (21) extend into the first liquid storage tank (15); one side of each first guide pipe (21) extending into the first liquid storage tank (15) is fixedly connected with a threaded pipe (16); the other ends of the two threaded pipes (16) extend out of the first liquid storage tank (15) and are communicated with the first liquid storage tank (12).
3. The battery pack thermal management system based on the combination design of the four-way valve and the variable flow resistance cold plate according to claim 2, wherein: the two first liquid storage tanks (15) are communicated through first liquid pipes (17) which are uniformly arranged, and the first liquid pipes (17) are immersed in cooling liquid; each first liquid pipe (17) is made of copper material.
4. The battery pack thermal management system based on the combined design of the four-way valve and the variable flow resistance cold plate according to claim 3, wherein: a second liquid storage tank (18) is fixedly connected in the inner wall of the cooling plate (1) below the first liquid storage tank (12), and the second liquid storage tank (18) is communicated with the first liquid storage tank (12) through a short pipe (141); a control valve (19) is fixedly connected in the short pipe (141); the second liquid storage tanks (18) partially extend into the first liquid storage tank (15); the inner walls of one sides of the second liquid storage tanks (18) extending into the two first liquid storage tanks (15) are fixedly connected with liquid guide pipes (111); a first long groove (121) is formed in the inner wall of the cooling plate (1) below the second liquid storage tank (18), and the first long grooves (121) are communicated with the liquid guide pipe (111); through holes (131) are uniformly distributed in the inner wall of the bottom of the first long groove (121), and the through holes (131) are communicated with the J-shaped groove (11).
5. The battery pack thermal management system based on the combined design of the four-way valve and the variable flow resistance cold plate according to claim 1, wherein: air pumps (26) which are uniformly arranged are fixedly connected in the inner wall of the cooling plate (1) below the second liquid storage tank (23); the upper surface of each air pump (26) is fixedly connected with an air pipe (27), and the bottom of each air pipe (27) is fixedly connected with a one-way valve (28); each air pipe (27) extends into the second liquid storage tank (23); air holes (29) which are uniformly distributed are formed in the inner wall of each air pipe (27).
6. The battery pack thermal management system based on the combined design of the four-way valve and the variable flow resistance cold plate according to claim 5, wherein: a second long groove (291) is formed above the second liquid storage tank (23), and the second long groove (291) is communicated with the air pipe (27); the inner wall of the second long groove (291) is provided with air grooves (292) which are uniformly distributed, and the air grooves (292) are communicated with the J-shaped groove (11).
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| CN111342164B (en) | 2020-11-27 |
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