CN120280609A - Low-temperature-difference low-flow-resistance liquid cooling plate - Google Patents
Low-temperature-difference low-flow-resistance liquid cooling plate Download PDFInfo
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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
- H01M10/6554—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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Abstract
A low-temperature-difference low-flow-resistance liquid cooling plate relates to the technical field of liquid cooling plate structures and comprises an upper cover plate and a flow passage plate, wherein the upper cover plate is arranged on the flow passage plate in a laminating mode, a cooling liquid inlet and a cooling liquid outlet are arranged on the same side of one end of the flow passage plate, a liquid inlet flow passage is arranged on the cooling liquid inlet side, a liquid outlet flow passage is arranged on the cooling liquid outlet side, a plurality of liquid inlet flow passages for cooling medium to flow are independently formed in the liquid inlet flow passage, each flow passage is a combination of different flow passage cavities from a single cavity to multiple cavities, a liquid inlet turbulent flow passage is arranged in the middle of the liquid inlet flow passage, a main converging flow passage communicated with the liquid outlet flow passage is arranged at the tail end of each liquid inlet flow passage, a multi-island converging flow passage is further arranged at the tail end of the liquid inlet flow passage far away from the liquid outlet flow passage, and the liquid outlet flow passage is of a multi-cavity decreasing flow passage structure. The liquid cooling plate has the advantages of relatively simple structure, good heat dissipation effect and lower flow resistance. The liquid cooling plate is used for more uniformly distributing the temperature of the surface of the battery, the temperature difference of the surface of the battery is controlled within 2 ℃, and the flow resistance is less than 20Kpa.
Description
Technical Field
The invention relates to the technical field of liquid cooling plates, in particular to a low-temperature-difference low-flow-resistance liquid cooling plate.
Background
Along with the wide application of the lithium ion battery in the fields of electric automobiles, energy storage systems and the like, the energy density and the power density of the lithium ion battery are continuously improved, but the thermal runaway risk is also obviously increased. If heat generated in the battery charging and discharging process cannot be timely dissipated, uneven temperature distribution, performance attenuation and even safety accidents can be caused. Traditional air cooling technology is difficult to meet the high-power scene requirement due to low efficiency and weak temperature control capability, and liquid cooling technology gradually becomes the mainstream choice due to higher heat dissipation efficiency.
The liquid cooling plate is tightly attached to the surface of the battery, and the fluid medium takes away heat generated by the battery through a flow passage of the liquid cooling plate, so that the battery thermal management function is realized. The most important purpose is to realize that the temperature difference of the surface of the battery is as small as possible, the temperature is generally controlled within 2-3 ℃ under the working condition of 0.5 ℃, the pressure drop is as low as possible, and the pressure drop is generally required to be within 25Kpa for 104s, particularly according to the actual working condition. The prior art discloses a scheme through optimizing liquid cooling plate runner structure, for example CN118610643a discloses a cooling method of liquid cooling plate runner structure, battery package and liquid cooling plate runner that is used for battery package heat dissipation, cooling medium import and cooling medium export have been arranged to lower liquid cooling plate one end homonymy, be provided with the entry side runner at the cooling medium import side, the cooling medium export side is provided with the export side runner, entry side runner and export side runner are the relative arrangement, form asymmetric structure, entry side runner and export side runner all independently form a plurality of shunt, every shunt is designed for the flow and the velocity of flow of cooling medium that flow in the regulation and control shunt from single cavity to the combination of the different quantity runner cavity of multi-chamber, the quantity of runner cavity that the cooling medium was arranged on the long shunt of path of coolant flow is more than the short shunt of path, export side runner can distribute more fluid in unit time and unit length in order to reduce the difference in temperature of battery package. However, the liquid cooling plate has a complicated flow channel structure and large flow resistance.
The high-performance liquid cooling plate can reasonably control the temperature difference and the flow passage pressure drop on the surface of the battery, so that the service life of the battery is prolonged, and the energy consumption is reduced. Therefore, how to realize the design of the high-performance liquid cooling plate is an important problem to be solved.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the defects of the prior art and providing the low-temperature-difference low-flow-resistance liquid cooling plate with simple structure and low temperature difference on the surface of a battery.
The technical scheme adopted for solving the technical problems is as follows:
A low-temperature-difference low-flow-resistance liquid cooling plate comprises an upper cover plate and a flow channel plate, wherein the upper cover plate is arranged on the flow channel plate in a bonding mode, a cooling liquid inlet and a cooling liquid outlet are arranged on the same side of one end of the flow channel plate, a liquid inlet channel is arranged on the cooling liquid inlet side, a liquid outlet channel is arranged on the cooling liquid outlet side, a plurality of liquid inlet flow channels for cooling medium to flow are independently formed in the liquid inlet flow channels, each liquid inlet flow channel is a combination of different flow channel cavities from a single cavity to multiple cavities, a liquid inlet turbulent flow channel is arranged in the middle of at least one liquid inlet flow channel, a main confluence channel communicated with the liquid outlet channel is arranged at the tail end of each liquid inlet flow channel, a multi-island confluence channel is further arranged at the tail end of the liquid inlet flow channel far away from the liquid outlet channel, and the liquid outlet channel is of a multi-cavity decreasing flow channel structure.
The low-temperature-difference low-flow-resistance liquid cooling plate has the advantages that the liquid inlet flow channel adopts the single-cavity to multi-cavity change, the rapid heat dissipation of a battery is facilitated, the temperature distribution is uniform, the liquid inlet turbulence flow channel is arranged in the middle of the liquid inlet flow channel, the liquid inlet flow channel can serve as a flow guide block for guiding the flow distribution of cooling liquid in the increasing process of the number of the cavities of the liquid inlet flow channel, meanwhile, the cooling liquid can be subjected to turbulence, the temperature distribution difference between different cavities of the same flow distribution channel is reduced, the integral heat dissipation performance of the liquid cooling plate is improved, the integral flow channel layout of the liquid cooling plate is used for enabling the surface temperature distribution of the battery to be more uniform, and the surface temperature difference of the battery can be controlled within 2 ℃ under the normal operation condition of the battery. The flow resistance of the multiple liquid inlet runner sub-channels flowing into the same liquid outlet channel is effectively reduced, and the pressure drop of the channels is effectively reduced.
In an exemplary embodiment, auxiliary converging flow channels are arranged between the tail ends of adjacent liquid inlet flow channels, and liquid outlet turbulent flow channels are arranged in the middle of the liquid outlet flow channels.
Preferably, the diameter of the auxiliary converging flow passage is larger than or equal to that of the main converging flow passage, so that the cooling liquid of the liquid inlet flow passage on one side of the liquid cooling plate far away from the liquid outlet flow passage is accelerated to quickly enter the liquid outlet flow passage, the flow resistance is further reduced, and the pressure drop of the flow passage is reduced.
The liquid inlet turbulent flow channel and the liquid outlet turbulent flow channel are composed of first partition plates and second partition plates which are arranged at intervals, the number of the first partition plates is larger than or equal to that of the second partition plates, the length of the first partition plates is shorter than that of the second partition plates, the first partition plates and the second partition plates are equal in width, and the number of cavities of the multi-cavity flow channel adjacent to the second partition plates is larger than or equal to that of the cavities of the multi-cavity flow channel adjacent to the first partition plates.
In an exemplary embodiment, the liquid inlet flow dividing channel comprises a first liquid inlet flow dividing channel, a second liquid inlet flow dividing channel and a third liquid inlet flow dividing channel, wherein the first liquid inlet flow dividing channel and the second liquid inlet flow dividing channel are sequentially provided with a single-cavity flow channel, a double-cavity flow channel, a liquid inlet turbulent flow channel, a three-cavity flow channel and a multi-island converging flow channel, auxiliary converging flow channels are arranged among the multi-island converging flow channels of the first liquid inlet flow dividing channel and the second liquid inlet flow dividing channel and between the multi-island converging flow channel of the second liquid inlet flow dividing channel and the tail end of the third liquid inlet flow dividing channel, the third liquid inlet flow dividing channel is sequentially provided with the single-cavity flow channel, the double-cavity flow channel, the liquid inlet turbulent flow channel and the three-cavity flow channel, and the liquid outlet flow channel is of a combined structure of the three-cavity flow channel, the liquid outlet turbulent flow channel and the three-cavity flow channel.
In an exemplary embodiment, the liquid inlet split channel comprises a first liquid inlet split channel, a second liquid inlet split channel and a third liquid inlet split channel, wherein the first liquid inlet split channel is sequentially provided with a single-cavity channel, a double-cavity channel, a three-cavity channel and a multi-island confluence channel along the flowing direction of cooling liquid, the second liquid inlet split channel is sequentially provided with the single-cavity channel, the double-cavity channel, the liquid inlet turbulent flow channel, the three-cavity channel and the multi-island confluence channel along the flowing direction of cooling liquid, an auxiliary confluence channel is arranged between the first liquid inlet split channel and the multi-island confluence channel of the second liquid inlet split channel and between the multi-island confluence channel of the second liquid inlet split channel and the tail end of the third liquid inlet split channel, the third liquid inlet split channel is sequentially provided with the single-cavity channel, the double-cavity channel, the liquid inlet turbulent flow channel and the three-cavity channel along the flowing direction of cooling liquid, the double-cavity channel comprises the double-narrow-cavity channel and the double-wide-cavity channel which are sequentially arranged along the flowing direction of cooling liquid, and the liquid outlet channel is a combination structure of the three-cavity channel, the liquid outlet channel and the turbulent flow channel.
Because the material thickness of the liquid cooling plate is 1 to 1.5mm, in order to improve the pressure bearing power of the liquid cooling plate, preferably, a first reinforcing rib is arranged between the adjacent sides of the cooling liquid inlet and the cooling liquid outlet of the runner plate, a second reinforcing rib is arranged between the gap between the cooling liquid inlet and the cooling liquid outlet and the single-cavity runner of the liquid inlet runner and the gap between the two-cavity runners, and the first reinforcing rib and the second reinforcing rib play a structural bearing reinforcing role, so that the pressure bearing capacity of the liquid cooling plate and the runners is improved.
The first reinforcing ribs and the second reinforcing ribs are provided with connecting screw holes, so that the upper cover plate and the runner plate are convenient to install and fix, and the integral strength of the liquid cooling plate can be enhanced.
The first reinforcing rib and the second reinforcing rib are composed of a plurality of short rib plates which are arranged at intervals.
Preferably, the low temperature difference low flow resistance liquid cooling plate is a 1P104S battery liquid cooling plate, and 1P104S refers to 104 electric cores on one liquid cooling plate.
The low-temperature-difference low-flow-resistance liquid cooling plate has the beneficial effects that:
The liquid cooling plate has a relatively simple structure, is convenient for large-scale production, and has a runner plate with a three-in one-out distribution structure, good heat dissipation effect and lower flow resistance. The liquid cooling plate is used for realizing more uniform temperature distribution on the surface of the battery, and the flow channel can ensure that the temperature difference of the surface of the battery of 1P104S (104 electric cores on one liquid cooling plate) is controlled within 2 ℃ under the normal operation condition of the battery, and the flow resistance is smaller than 20Kpa.
Drawings
FIG. 1 is a perspective view showing the use state of a low temperature difference low flow resistance liquid cooling plate and a battery cell module according to the present invention;
FIG. 2-is a schematic view of the structure of a flow path plate in a low temperature difference low flow resistance liquid cooling plate in embodiment 1;
FIG. 3 is a graph showing the temperature distribution of the battery surface in a low temperature difference low flow resistance liquid cooling plate simulation experiment (inlet flow 8L/min,20 ℃ C. Ethylene glycol, 0.5℃ Working condition) in example 1;
FIG. 4 is a graph showing the temperature distribution of a flow channel plate in a low temperature differential low flow resistance liquid cooling plate simulation experiment (inlet flow 8L/min,20 ℃ C. Ethylene glycol, 0.5℃ Working condition) in example 1;
FIG. 5 is a graph showing the temperature distribution of the battery surface in a low temperature difference low flow resistance liquid cooling plate simulation experiment (inlet flow 10L/min,20 ℃ glycol, 0.5℃ Working condition) in example 1;
FIG. 6-is a schematic view of the structure of a flow path plate in a low temperature difference low flow resistance liquid cooling plate in example 2;
FIG. 7 is a graph showing the temperature distribution of the battery surface in a low temperature difference low flow resistance liquid cooling plate simulation experiment (inlet flow 10L/min,20 ℃ C. Ethylene glycol, 0.5℃ Working condition) in example 2;
FIG. 8 is a graph showing the temperature distribution of a flow channel plate in a low temperature differential low flow resistance liquid cooling plate simulation experiment (inlet flow 10L/min,20℃ethylene glycol, 0.5C operating mode) in example 2;
FIG. 9 is a schematic view showing the structure of a flow path plate in a low temperature difference low flow resistance liquid cooling plate in example 3;
FIG. 10 is a graph showing the temperature distribution of a low temperature difference low flow resistance liquid cooling plate simulation test (inlet flow rate 10L/min,20 ℃ glycol, 0.5C working condition) in example 3, wherein (a) the cell surface temperature distribution and (b) the flow channel plate temperature distribution are shown.
The electric core module comprises a core module body 1, a liquid cooling plate, a cooling liquid inlet, a cooling liquid outlet, a cooling liquid flow channel 5, a liquid inlet flow channel 51, a first liquid inlet flow channel 52, a second liquid inlet flow channel 53, a third liquid inlet flow channel 6, a liquid outlet flow channel 7, a first reinforcing rib 8, a second reinforcing rib 9, a single cavity flow channel 10, a double cavity flow channel 101, a double narrow cavity flow channel 102, a double wide cavity flow channel 11, a liquid inlet turbulent flow channel 12, a first partition plate 13, a second partition plate 14, a three cavity flow channel 15, a multi-island confluence flow channel 16, a main confluence flow channel 17, a liquid outlet turbulent flow channel 18, a connecting screw hole 19 and an auxiliary confluence flow channel.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Example 1
Referring to fig. 1 and 2, the low temperature difference low flow resistance liquid cooling plate 2 of the embodiment comprises an upper cover plate and a flow channel plate, wherein the upper cover plate is arranged on the flow channel plate in a bonding mode, a cooling liquid inlet 3 and a cooling liquid outlet 4 are arranged on the same side of one end of the flow channel plate, a liquid inlet channel 5 is arranged on the side of the cooling liquid inlet 3, a liquid outlet channel 6 is arranged on the side of the cooling liquid outlet 4, a plurality of liquid inlet flow channels for cooling medium to flow are independently formed in the liquid inlet channel 5, each flow channel is a combination of different flow channel cavities from a single cavity to multiple cavities, a liquid inlet turbulence flow channel 11 is arranged at the middle of the flow channel, a main confluence flow channel 16 communicated with the liquid outlet flow channel 6 is arranged at the tail end of each liquid inlet flow channel, a multi-island confluence flow channel 15 is further arranged at the tail end of the liquid inlet flow channel far away from the liquid outlet flow channel 6, and the liquid outlet flow channel 6 is of a multi-cavity decreasing flow channel structure.
The liquid inlet flow channel 5 of the low-temperature-difference low-flow-resistance liquid cooling plate 2 is changed from a single cavity to multiple cavities, so that the battery can quickly dissipate heat and has uniform temperature distribution, the liquid inlet turbulence flow channel 11 arranged in the middle of the liquid inlet flow channel 5 can serve as a flow guide block to guide the diversion of cooling liquid in the increasing process of the number of the cavities of the liquid inlet flow channel 5, meanwhile, the cooling liquid can be subjected to turbulence, the temperature distribution difference between different cavities of the same flow diversion channel is reduced, the integral heat dissipation performance of the liquid cooling plate 2 is improved, the integral flow channel layout of the liquid cooling plate 2 is used for enabling the surface temperature distribution of the battery to be more uniform, and the flow channel can ensure that the surface temperature difference of the battery is controlled within 2 ℃ under the normal operation working condition of the battery. The main confluence flow channel 16 at the tail end of the liquid inlet flow channel and the multi-island confluence flow channel 15 at the tail end of the liquid inlet flow channel far away from the liquid outlet flow channel 6 effectively reduce the flow resistance of the multiple liquid inlet flow channels 5 flowing into the same liquid outlet flow channel 6, thereby effectively reducing the flow channel pressure drop.
The middle part of the liquid outlet channel 6 is provided with a liquid outlet turbulent flow channel 17.
The liquid inlet turbulent flow channel 11 and the liquid outlet turbulent flow channel 17 are composed of first partition plates 12 and second partition plates 13 which are arranged at intervals, the number of the first partition plates 12 is 2 and is larger than the number of the second partition plates 13 (the number of the second partition plates 13 is 1), the length of the first partition plates 12 is shorter than that of the second partition plates 13, the two partition plates are equal in width, and the number of cavities (three-cavity flow channels) of the multi-cavity flow channels adjacent to the second partition plates 13 is more than or equal to that of the multi-cavity flow channels adjacent to the first partition plates 12 (double-cavity flow channels).
The liquid inlet flow dividing channel comprises a first liquid inlet flow dividing channel 51, a second liquid inlet flow dividing channel 52 and a third liquid inlet flow dividing channel 53, wherein the first liquid inlet flow dividing channel 51 and the second liquid inlet flow dividing channel 52 are sequentially provided with a single-cavity flow channel 9, a double-cavity flow channel 10, a liquid inlet turbulent flow channel 11, a three-cavity flow channel 14 and a multi-island confluence flow channel 15, the third liquid inlet flow dividing channel 53 is sequentially provided with the single-cavity flow channel 9, the double-cavity flow channel 10, the liquid inlet turbulent flow channel 11 and the three-cavity flow channel 14, and the liquid outlet flow channel 6 is a combined structure of the three-cavity flow channel 14, the liquid outlet turbulent flow channel 17 and the three-cavity flow channel 14.
The diameter of the auxiliary converging flow passage 19 is larger than or equal to that of the main converging flow passage 16, so that the cooling liquid of the liquid inlet flow passage 5 on one side of the liquid cooling plate 2 far away from the liquid outlet flow passage 6 is accelerated to quickly enter the liquid outlet flow passage 6, the flow resistance is further reduced, and the flow passage pressure drop is reduced.
Because the material thickness of the liquid cooling plate 2 is 1 to 1.5mm, in order to improve the compression power of the liquid cooling plate 2, a first reinforcing rib 7 is arranged between the adjacent sides of the cooling liquid inlet 3 and the cooling liquid outlet 4 of the runner plate, a second reinforcing rib 8 is arranged between the gap between the other side of the cooling liquid inlet 3 and the cooling liquid outlet 4 and the single-cavity runner 9 of the liquid inlet runner 5 and the middle of the double-cavity runner 10, and the first reinforcing rib 7 and the second reinforcing rib 8 play a structural bearing reinforcing role, so that the compression capacity of the liquid cooling plate 2 and the runner is improved.
Referring to fig. 1, a low temperature difference low flow resistance liquid cooling plate 2 of the present application is disposed below a battery cell module 1. The low temperature difference low flow resistance liquid cooling plate is a 1P104S battery liquid cooling plate, and it is to be noted that 1P104S refers to a battery cell module 1 formed by arranging 104 battery cells on a liquid cooling plate.
Example 2
Referring to fig. 1 and 6, a low temperature difference low flow resistance liquid cooling plate 2 of the present embodiment is different from the embodiment in that:
an auxiliary confluence flow passage 19 is arranged between the tail ends of the adjacent liquid inlet flow distribution passages.
The first reinforcing ribs 7 and the second reinforcing ribs 8 are provided with connecting screw holes 18, so that the upper cover plate and the runner plate are convenient to install and fix, and the integral strength of the liquid cooling plate 2 can be enhanced.
Example 3
Referring to fig. 9 to 10, a low temperature difference low flow resistance liquid cooling plate 2 of the present embodiment is different from the embodiment in that:
The liquid inlet split flow channel comprises a first liquid inlet split flow channel 51, a second liquid inlet split flow channel 52 and a third liquid inlet split flow channel 53, wherein the first liquid inlet split flow channel 51 is sequentially provided with a single-cavity flow channel 9, a double-cavity flow channel 10, a three-cavity flow channel 14 and a multi-island converging flow channel 15 along the cooling liquid flow direction, the second liquid inlet split flow channel 52 is sequentially provided with the single-cavity flow channel 9, the double-cavity flow channel 10, a liquid inlet turbulent flow channel 11, the three-cavity flow channel 14 and the multi-island converging flow channel 15 along the cooling liquid flow direction, the auxiliary converging flow channel 19 is arranged between the multi-island converging flow channel 15 of the first liquid inlet split flow channel 51 and the second liquid inlet split flow channel 52 and between the multi-island converging flow channel 15 of the second liquid inlet split flow channel 52 and the tail end of the third liquid inlet split flow channel 53, the third liquid inlet split flow channel 53 is sequentially provided with the single-cavity flow channel 9, the double-cavity flow channel 10, the liquid inlet turbulent flow channel 11 and the three-cavity flow channel 14 along the cooling liquid flow direction, and the double-cavity flow channel 10 comprises a double-cavity flow channel 101, a double-cavity flow channel 102 and a liquid outlet turbulent flow channel 14, and a three-cavity flow channel 14 which are sequentially arranged along the cooling liquid flow direction.
An auxiliary confluence flow passage 19 is arranged between the tail ends of the adjacent liquid inlet flow distribution passages.
Because the material thickness of the liquid cooling plate 2 is 1 to 1.5mm, in order to improve the compression power of the liquid cooling plate 2, a first reinforcing rib 7 is arranged between the adjacent sides of the cooling liquid inlet 3 and the cooling liquid outlet 4 of the runner plate, a second reinforcing rib 8 is arranged between the gap between the other side of the cooling liquid inlet 3 and the cooling liquid outlet 4 and the single-cavity runner 9 of the liquid inlet runner 5 and the middle of the double-cavity runner 10, and the first reinforcing rib 7 and the second reinforcing rib 8 play a structural bearing reinforcing role, so that the compression capacity of the liquid cooling plate 2 and the runner is improved.
The first reinforcing ribs 7 and the second reinforcing ribs 8 are composed of a plurality of short rib plates which are arranged at intervals.
The first reinforcing ribs 7 and the second reinforcing ribs 8 are provided with connecting screw holes 18, so that the upper cover plate and the runner plate are convenient to install and fix, and the integral strength of the liquid cooling plate 2 can be enhanced.
The low temperature difference low flow resistance liquid cooling plate 2 described in examples 1 to 3 was subjected to simulation experiments under the conditions of inlet flow rate of 8L/min, 25 ℃ or 10L/min, 20 ℃ glycol, and 0.5C, and the temperature distribution of the battery modules of the simulation experiments of the low temperature difference low flow resistance liquid cooling plate 2 of examples 1,2, and 3 was as shown in fig. 3 (inlet flow rate of 8L/min) and fig. 5 (inlet flow rate of 10L/min), fig. 7 (inlet flow rate of 8L/min), and fig. 10 (a) (inlet flow rate of 10L/min), and the temperature distribution during the operation of the liquid cooling plate 2 of examples 1,2, and 3 was as shown in fig. 4, 8, and 10 (b).
Referring to fig. 3 and 5, in the low temperature difference low flow resistance liquid cooling plate 2 in the embodiment 1, when the inlet flow rate is 10L/min, the temperature of 20 ℃ glycol is 0.5 ℃ and the temperature of the battery surface of the low temperature difference low flow resistance liquid cooling plate 2 in the embodiment 1 is 28.17 ℃ at the highest, the temperature of the battery surface is 26.18 ℃ at the lowest, the temperature difference of the battery surface is only 1.99 ℃ and the temperature difference of the inlet and outlet cooling liquid is 3.36 ℃, in order to further examine the influence of the cooling liquid flow rate and the initial temperature on the cooling plate cooling battery, the inventor of the application also completes the simulation experiment under the working conditions of the inlet flow rate of 8L/min, the temperature of 25 ℃ glycol and the temperature of 0.5 ℃ and the battery surface temperature of 33.45 ℃ at the highest, the temperature of 31.15 ℃ at the lowest and the temperature difference of the battery surface of only 2.3 ℃ and the temperature difference of the inlet and outlet cooling liquid of 4.02 ℃ at the highest, which shows that the designed flow channel structure of the liquid cooling plate can meet the cooling requirement of the battery pack even if the cooling liquid inlet flow rate is reduced and the initial temperature of the cooling liquid is increased, the battery surface temperature difference is still lower than 3 ℃ and the battery surface maximum temperature is allowed to be within the allowable temperature of the battery core die (max ℃) of 35 ℃ or less than or equal to 48 ℃.
The low temperature difference and low flow resistance liquid cooling plate 2 in the embodiment 2 has the advantages that the temperature of the battery surface is up to 28.09 ℃ and is at the lowest 26.16 ℃ in a simulation experiment under the working conditions of 10L/min of inlet flow, 20 ℃ of glycol and 0.5 ℃ in the low temperature difference and low flow resistance liquid cooling plate 2, the temperature difference of the battery surface is only 1.93 ℃ and the temperature difference of inlet and outlet cooling liquid is 3.28 ℃, and the temperature uniformity of the battery surface is obviously improved through the optimized design of a convection structure, and the temperature difference of the battery surface is smaller than 2 ℃ and is obviously lower than 3 ℃ required by the conventional requirement.
The low temperature difference low flow resistance liquid cooling plate 2 in the embodiment 3 has good cooling effect on a battery core body based on the low temperature difference low flow resistance liquid cooling plate 2 of the embodiment 3, the temperature of the battery surface is at the highest 34.53 ℃ and the temperature difference of the inlet cooling liquid is at the lowest 32.74 ℃ in a simulation experiment under the working condition of the inlet flow rate of 8L/min, the ethylene glycol at 25 ℃ and the temperature of 0.5 ℃, the temperature of the battery surface is at the highest 34.53 ℃ and the temperature difference of the battery surface is only 1.79 ℃, namely, the low temperature difference low flow resistance liquid cooling plate 2 in the embodiment 1 for the simulation experiment under the same condition obviously improves the uniformity of the temperature distribution of the battery surface to be lower than the conventional requirement of 3 ℃ by adopting the double narrow cavity flow channel and the double wide cavity flow channel which are sequentially arranged to replace the double cavity flow channel in the prior embodiment 1, and reducing the flow resistance of the cooling liquid in the process of the cooling liquid in a synchronous and relatively reducing the temperature lifting range of the cooling liquid in the heat dissipation process of the battery surface by optimizing the confluence flow channel structure at the tail end of the liquid inlet flow channel.
The static pressure drop and static temperature of the coolant inlet 3 and the coolant outlet 4 of the low temperature difference low flow resistance liquid cooling plate 2 of examples 1 to 3 are shown in table 1.
TABLE 1 static pressure drop and static temperature at the coolant inlet and coolant outlet of a low temperature differential low flow resistance liquid cooled panel
As can be seen from table 1, the flow resistance of the flow channel of the low temperature-difference low flow resistance liquid cooling plate 2 of the present application is lower than the conventional requirement of 25KPa, the flow resistance of the low temperature-difference low flow resistance liquid cooling plate 2 of the embodiment 2 is lower than 15.026KPa in the flow channel of the embodiment 2 compared with the flow resistance pressure drop supply 17.223KPa of the embodiment 1 under the same simulation experiment condition by adding the auxiliary confluence flow channel 19 on the basis of the embodiment 1, and the flow resistance of the liquid cooling plate 2 is further remarkably reduced. The low temperature-difference low flow resistance liquid cooling plate 2 of embodiment 3 adjusts the existing double-cavity flow channel into a combined structure of the double-narrow-cavity flow channel and the double-wide-cavity flow channel on the basis of embodiment 1, omits the turbulent flow channel in the middle of the first liquid inlet flow channel, and reduces the inlet flow rate of the cooling liquid and further reduces the pressure drop of the flow channel on the premise of ensuring that the cooling effect of the liquid cooling plate on the battery cell module meets the requirement by reducing the flow resistance in the cooling liquid flow channel as low as 13.0K49pa relative to the flow resistance pressure drop supply 14.331KPa in embodiment 1 under the same simulation experiment condition, thereby indicating that the low temperature-difference low flow resistance liquid cooling plate 2 of the application achieves the purpose that the surface temperature difference of the battery cell module is lower than 2 ℃ and simultaneously further remarkably reduces the pressure drop of the liquid cooling plate in the prior art.
In summary, the low temperature difference low flow resistance liquid cooling plate 2 of the application can reasonably control the temperature difference and the flow passage pressure drop on the surface of the battery, thereby prolonging the service life of the battery and reducing the energy consumption.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Claims (10)
1. A low-temperature-difference low-flow-resistance liquid cooling plate is characterized by comprising an upper cover plate and a flow channel plate, wherein the upper cover plate is arranged on the flow channel plate in a fitting mode, a cooling liquid inlet (3) and a cooling liquid outlet (4) are arranged on the same side of one end of the flow channel plate, a liquid inlet flow channel (5) is arranged on the side of the cooling liquid inlet (3), a liquid outlet flow channel (6) is arranged on the side of the cooling liquid outlet (4), a plurality of liquid inlet flow channels for cooling medium flowing are independently formed in the liquid inlet flow channel (5), each liquid inlet flow channel is a combination of different flow channel cavities from a single cavity to a plurality of cavities, a liquid inlet turbulence flow channel (11) is arranged in the middle of at least one liquid inlet flow channel, a main confluence flow channel (16) communicated with the liquid outlet flow channel (6) is arranged at the tail end of each liquid inlet flow channel, a plurality of island confluence flow channels (15) are further arranged at the tail ends of the liquid inlet flow channels far away from the liquid outlet flow channel (6), and the liquid outlet flow channel (6) is of a multi-cavity decreasing flow channel structure.
2. The low-temperature-difference low-flow-resistance liquid cooling plate according to claim 1, wherein an auxiliary converging flow passage (19) is arranged between the tail ends of adjacent liquid inlet flow passages, and a liquid outlet turbulent flow passage (17) is arranged in the middle of the liquid outlet flow passage (6).
3. The low temperature difference low flow resistance liquid cooling plate according to claim 2, wherein the diameter of the auxiliary merging flow passage (19) is equal to or larger than the diameter of the main merging flow passage (16).
4. The low-temperature-difference low-flow-resistance liquid cooling plate according to claim 2, wherein the liquid inlet turbulent flow channel (11) and the liquid outlet turbulent flow channel (17) are composed of first partition plates (12) and second partition plates (13) which are arranged at intervals, the number of the first partition plates (12) is larger than or equal to that of the second partition plates (13), the length of the first partition plates (12) is shorter than that of the second partition plates (13), the two partition plates are equal in width, and the number of cavities of the adjacent multi-cavity flow channels of the second partition plates (13) is larger than or equal to that of the adjacent multi-cavity flow channels of the first partition plates (12).
5. The low-temperature-difference low-flow-resistance liquid cooling plate according to claim 1 or 2, wherein the liquid inlet split channels comprise a first liquid inlet split channel (51), a second liquid inlet split channel (52) and a third liquid inlet split channel (53), the first liquid inlet split channel (51) and the second liquid inlet split channel (52) are sequentially provided with a single-cavity channel (9), a double-cavity channel (10), a liquid inlet turbulent flow channel (11), a three-cavity channel (14) and a multi-island confluence channel (15), an auxiliary confluence channel (19) is arranged between the multi-island confluence channel (15) of the first liquid inlet split channel (51), the second liquid inlet split channel (52) and the tail end of the second liquid inlet split channel, the third liquid inlet split channel (53) is sequentially provided with a single-cavity channel (9), a double-cavity channel (10), a liquid inlet turbulent flow channel (11) and a three-cavity channel (14), and the liquid outlet channel (6) is a turbulent flow channel structure of a combination of the three-cavity channel (14) and the three-cavity channel (17).
6. The low temperature difference low flow resistance liquid cooling plate according to claim 5, wherein a first reinforcing rib (7) is arranged between adjacent sides of the cooling liquid inlet (3) and the cooling liquid outlet (4) of the flow passage plate, and a second reinforcing rib (8) is arranged between a gap between the cooling liquid inlet (3), the other side of the cooling liquid outlet (4) and the single cavity flow passage (9) of the liquid inlet flow passage (5) and between the double cavity flow passages (10).
7. The low temperature difference low flow resistance liquid cooling plate according to claim 6, wherein the first reinforcing rib (7) and the second reinforcing rib (8) are provided with connecting screw holes (18).
8. The low temperature-difference low flow resistance liquid cooling plate according to claim 1 or 2, wherein the first reinforcing rib (7) and the second reinforcing rib (8) are composed of a plurality of short rib plates which are arranged at intervals.
9. The low-temperature-difference low-flow-resistance liquid cooling plate as claimed in claim 1 or 2, wherein the liquid inlet split channels comprise a first liquid inlet split channel (51), a second liquid inlet split channel (52) and a third liquid inlet split channel (53), the first liquid inlet split channel (51) is sequentially provided with a single-cavity flow channel (9), a double-cavity flow channel (10), a three-cavity flow channel (14) and a multi-island confluence flow channel (15) along the flowing direction of cooling liquid, the second liquid inlet split channel (52) is sequentially provided with a single-cavity flow channel (9), a double-cavity flow channel (10), a turbulent flow channel (11), a three-cavity flow channel (14) and a multi-island confluence flow channel (15) along the flowing direction of cooling liquid, the first liquid inlet split channel (51), the multi-island confluence flow channel (15) of the second liquid inlet split channel (52) and the auxiliary confluence flow channel (19) are sequentially arranged between the multi-island confluence flow channel (15) of the second liquid inlet split channel (52) and the tail end of the third liquid split channel (53), the third liquid split channel (52) is sequentially provided with a single-cavity flow channel (9), the double-cavity flow channel (10) and the double-cavity flow channel (11) are sequentially arranged along the flowing direction of cooling liquid flow channel (10), the liquid outlet flow channel (6) is a combined structure of a three-cavity flow channel (14), a liquid outlet turbulent flow channel (17) and the three-cavity flow channel (14).
10. The low temperature-differential low flow resistance liquid cooling plate according to claim 1 or 2, wherein the low temperature-differential low flow resistance liquid cooling plate is a 1P104s battery liquid cooling plate.
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|---|---|---|---|
| CN202510687505.8A CN120280609A (en) | 2025-05-27 | 2025-05-27 | Low-temperature-difference low-flow-resistance liquid cooling plate |
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| CN202510687505.8A CN120280609A (en) | 2025-05-27 | 2025-05-27 | Low-temperature-difference low-flow-resistance liquid cooling plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120834337A (en) * | 2025-09-16 | 2025-10-24 | 浙江晶科储能有限公司 | Liquid cooling plates, energy storage devices, energy storage systems and electrical equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120834337A (en) * | 2025-09-16 | 2025-10-24 | 浙江晶科储能有限公司 | Liquid cooling plates, energy storage devices, energy storage systems and electrical equipment |
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