WO2023273811A1 - 电池冷板及电池系统 - Google Patents
电池冷板及电池系统 Download PDFInfo
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- WO2023273811A1 WO2023273811A1 PCT/CN2022/097400 CN2022097400W WO2023273811A1 WO 2023273811 A1 WO2023273811 A1 WO 2023273811A1 CN 2022097400 W CN2022097400 W CN 2022097400W WO 2023273811 A1 WO2023273811 A1 WO 2023273811A1
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- branch
- inlet
- branches
- outlet
- cold plate
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- 238000001816 cooling Methods 0.000 title abstract description 17
- 230000007423 decrease Effects 0.000 claims description 5
- 239000000110 cooling liquid Substances 0.000 abstract description 55
- 230000017525 heat dissipation Effects 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000013461 design Methods 0.000 description 14
- 239000007788 liquid Substances 0.000 description 6
- 210000001503 joint Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003032 molecular docking Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
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Classifications
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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
-
- 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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- 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
Definitions
- the present disclosure relates to new energy battery heat dissipation technology, in particular to a battery cold plate and a battery system.
- the current design of the new energy battery cooling system includes air cooling, liquid cooling, direct cooling, etc. Different cooling methods have different heat transfer results.
- the liquid cooling method is a cooling method commonly used at present, and the design of the liquid cooling is mainly the design of the liquid cooling plate. At present, more attention is paid to the design of the runner for the design of the cold plate. As the power demand and cruising range of the battery system increase, the size of the battery pack is getting larger and larger, and the size of the same cold plate is also getting larger, and the flow required in the heat dissipation system is increasing. , The flow resistance of the internal branches of the cold plate varies greatly, which makes the temperature of the cold plate uneven, resulting in poor heat dissipation balance.
- the disclosure provides a battery cold plate and a battery system, which can improve the temperature uniformity of each part of the cold plate, and improve the heat dissipation balance and efficiency.
- an embodiment of the present disclosure provides a battery cold plate, including two external interfaces, two confluence pipelines, and multiple branches;
- Each of the confluence pipelines is extended along the first direction, and the two external interfaces are respectively connected to the middle positions of the two confluence pipelines in the first direction;
- a plurality of the branches are arranged side by side along the first direction, and are located between two confluence pipelines in the second direction; the two ends of each branch in the second direction respectively pass at least One throttling port is connected to the two converging pipelines; the first direction and the second direction are two directions perpendicular to each other; the total cross-sectional area of the throttling port on the branch near the external interface is less than The total cross-sectional area of the orifice on the branch away from the external interface;
- a plurality of sub-branches are arranged in the branch along the first direction, each of the sub-branches is extended along the second direction, and the ends of the multiple sub-branches in the same branch are connected, and all the sub-branches
- the cross-sectional areas of the branches are the same.
- the number of throttle openings on the branch near the external interface is smaller than the number of throttle openings on the branch far from the external interface.
- the number of throttle openings on the branch near the external interface is equal to the number of throttle openings on the branch far from the external interface.
- each throttle port is the same.
- the cross-sectional area of the orifice on the branch near the external interface is smaller than the cross-sectional area of the orifice on the branch away from the external interface.
- the number of sub-branches in a branch close to the external interface is greater than the number of sub-branches in a branch far from the external interface.
- all sub-branches in all branches have the same cross-sectional area.
- the two external interfaces are the main inlet and the main outlet respectively
- the two confluence pipelines are the inlet and outlet confluence pipelines respectively
- the total inlet and the inlet confluence pipeline are , a plurality of the branches, the outlet confluence pipeline, and the total outlet are connected in sequence
- the throttle between the branch and the inlet confluence pipeline is a throttle inlet
- the branch The throttle port between the outlet confluence pipeline is the outlet throttle port.
- the number of the meter-in orifice and the meter-out orifice in the same branch is the same, and the cross-sectional area of the meter-out orifice is greater than or equal to the cross-sectional area of the meter-in orifice .
- the branch near the main inlet includes a first meter-in orifice and a first meter-out orifice, and the distance between the first meter-in orifice and the main inlet is smaller than the first meter-in orifice. The distance between a throttle port and the total outlet.
- said branch in a said branch, has opposite first and second sides in said first direction, ends of a plurality of said sub-branches A confluence cavity is formed between the throttle ports, and a confluence cavity is formed between the ends of the plurality of sub-branches and the throttle port;
- the size of the inlet and manifold cavity in the second direction gradually decreases, and the size of the outlet and manifold cavity in the second direction gradually increases;
- the meter-in inlet is located at a position where the size of the inlet-combining chamber is larger in the second direction;
- the throttle outlet is located at a position where the size of the manifold outlet in the second direction is larger.
- an inlet cavity is provided at the general inlet, and the total inlet communicates with the inlet confluence pipeline through the inlet cavity, and a plurality of inlet protrusions are arranged in the inlet cavity, and the plurality of inlets Protrusion array arrangement.
- an outlet cavity is provided at the total outlet, and the total outlet communicates with the outlet confluence pipeline through the outlet cavity, and a plurality of outlet protrusions are arranged in the outlet cavity, and the plurality of outlets Protrusion array arrangement.
- a plurality of first guide bars are arranged in the inlet confluence pipeline, and the plurality of first guide bars extend along the first direction and are arranged at intervals.
- the plurality of first flow guide bars are arranged in one or more rows along the second direction.
- the structures of the battery cold plate on both sides of the central axis are symmetrical.
- the battery cold plate includes a first plate body and a second plate body opposite to the first plate body, the first plate body forms a cavity and a plurality of ribs on the surface, and the plurality of The ribs are located in the cavity, and the ribs separate the cavity to form the two confluence pipelines, the multiple branches, and the multiple sub-branches, and the second board is provided with A plurality of butt holes, the plurality of butt holes are set corresponding to the plurality of ribs, and the plurality of ribs are abutted in the plurality of butt holes, so as to realize the connection between the first plate body and the second plate body positioning connection between.
- the plurality of raised ribs and the plurality of docking holes are interference fit.
- the butt holes are through holes.
- an embodiment of the present disclosure also provides a battery system, including a battery and the aforementioned battery cold plate, where the battery cold plate is bonded to the battery.
- the two external interfaces are respectively connected to the middle positions of the two confluence pipelines in the first direction; so that the flow of the cooling liquid in the confluence pipeline is half of the length of the confluence pipeline, so that the flow resistance of the cooling liquid along the confluence pipeline can be reduced; by gradually increasing the total cross-sectional area of several orifices in the branches away from the total outlet, and the sub-branches in all branches
- the width of the road, that is, the cross-sectional area is the same, which can balance the flow resistance of each branch, ensure that the flow resistance in each branch is consistent, and balance the flow rate of the cooling liquid in each branch, thereby making the temperature of the cold plate more uniform and improving
- the heat dissipation balance and efficiency are conducive to reducing the system's demand for water pump power, thereby reducing system costs.
- Fig. 1 is a schematic diagram of the internal pipeline structure of the battery cold plate provided by an embodiment of the present disclosure
- Fig. 2 is a schematic diagram of cooling liquid flowing in the pipeline in Fig. 1;
- Fig. 3 is a schematic structural view of the first plate body of the battery cold plate provided by an embodiment of the present disclosure
- Fig. 4 is a schematic structural diagram of a second plate body of a battery cold plate provided by an embodiment of the present disclosure.
- the disclosure provides a battery cold plate and a battery system.
- the battery system includes a battery and a battery cold plate.
- the battery cold plate is attached to the battery.
- the battery cold plate can dissipate heat from the battery through liquid cooling.
- the first direction in which the X-axis extends is hereinafter referred to as "the first direction X” and the second direction in which the Y-axis extends is hereinafter referred to as the “second direction Y" are two mutually perpendicular directions, referring to Figure 1
- the overall shape of the battery cold plate is square
- the first direction X is the left and right length direction of the battery cold plate
- the second direction Y is the width direction of the battery cold plate up and down.
- the first direction X may also be the width direction of the battery cold plate
- the second direction Y is the length direction of the battery cold plate.
- the battery cold plate includes a total inlet 10a, an inlet confluence pipeline 20a, a plurality of branches 31/32/33, an outlet confluence pipeline 20b, and a total Exit 10b.
- the main inlet 10a and the main outlet 10b are two external ports of the cold plate of the battery, which can be respectively connected to two circulation ports of the circulation pump.
- the cooling liquid flows into the battery cold plate through the main inlet 10a, passes through the inlet confluence pipeline 20a, multiple branches 31/32/33, and the outlet confluence pipeline 20b in sequence, and flows out of the battery cold plate from the main outlet 10b, and flows back to the circulation Pump.
- the inlet confluence pipeline 20a and the outlet confluence pipeline 20b are two confluence pipelines, which are respectively arranged at the general inlet 10a and the general outlet 10b. Both the inlet and outlet pipelines 20a and the outlet pipelines 20b extend along the first direction X respectively.
- the main inlet 10a is connected to the middle position of the inlet confluence pipeline 20a in the first direction X. After the cooling liquid enters the inlet confluence pipeline 20a through the main inlet 10a, it flows to both ends of the inlet confluence pipeline 20a along the first direction X. flow, so that the flow of the cooling liquid in the inlet confluence pipeline 20a is half the length of the inlet confluence pipeline 20a, thereby reducing the flow resistance of the cooling liquid in the inlet confluence pipeline 20a.
- the main inlet 10a is provided with an inlet cavity 11a, and the total inlet 10a is connected with the inlet confluence pipeline 20a through the inlet cavity 11a.
- the inlet cavity 11a is square, and a plurality of inlet protrusions 12a are arranged in the inlet cavity 11a, and the plurality of inlet protrusions 12a are arranged in an array, and the plurality of inlet protrusions 12a can also be used to divert the cooling liquid entering the inlet cavity 11a to avoid The cooling liquid is too concentrated at this location and increases flow resistance.
- a plurality of first flow guide bars 21a are disposed in the inlet confluence pipeline 20a, and the plurality of first flow guide bars 21a extend along the first direction X and are arranged at intervals.
- a plurality of first guide bars 21a extend along the first direction X, and the cooling liquid entering the inlet confluence pipeline 20a can flow along the first guide bars 21a by using the first guide bars 21a, that is, along the first direction X flow, thereby reducing the flow resistance of the cooling liquid in the inlet confluence pipeline 20a.
- a plurality of first flow guide bars 21a are arranged at intervals along the first direction X, and part of the cooling liquid can flow to the branches in gaps between the plurality of flow guide bars.
- first guide strips 21a are arranged in two rows along the second direction Y, so as to better achieve the effect of guide flow and reduce flow resistance, and at the same time guide more cooling liquid away from the main inlet 10a at the branch road.
- multiple first guide bars 21a can be arranged in one row, three rows, or more rows.
- a plurality of branches 31 / 32 / 33 are arranged side by side along the first direction X, and are located between the inlet confluence pipeline 20 a and the outlet confluence pipeline 20 b in the second direction Y. Both ends of each branch in the second direction Y are connected to the inlet and outlet pipelines 20a and outlet pipelines 20b through several throttle ports.
- Each branch 31/32/33 is arranged with a plurality of sub-branches along the first direction X, and each sub-branch is extended along the second direction Y, and the ends of the multiple sub-branches in the same branch are connected, so that entering The cooling liquid in the branch enters the sub-branch from one end of the sub-branch, and flows out of the sub-branch from the other end of the sub-branch.
- the number of branches is six.
- the line connecting the central positions of the main inlet 10a and the main outlet 10b is the central axis, and three branch roads are respectively arranged on both sides of the central axis.
- the structures on both sides of the central axis are roughly the same, and here one side is taken as an example to describe the structures of the three branches.
- the three branches are respectively the first branch 31 , the second branch 32 and the third branch 33 .
- the second branch 32 is arranged between the first branch 31 and the third branch 33 .
- the first branch 31 is closer to the main inlet 10 a and the main outlet 10 b than the third branch 33 .
- first branch 31 One end of the first branch 31 is connected to the inlet confluence pipeline 20a through a first throttle inlet 31a, and the other end is connected to the outlet confluence pipeline 20b through a first throttle outlet 31b.
- first branch 31 On the first branch 31, there is one first inlet throttle port 31a, and one first outlet throttle port 31b.
- Multiple first sub-branches 310 are arranged in the first branch 31 .
- the first meter-in orifice 31a and the first meter-out orifice 31b can be determined according to the number of first sub-branches 310 in the first branch 31.
- first meter-out orifice 31b can also be set to two or more.
- the cross-sectional area of each first meter-out orifice 31b is the same as that of each first meter-in orifice 31a, so the number of to adjust the flow of the cooling liquid, of course, in other embodiments, the first meter-out orifice 31b and the first meter-in orifice 31a can be kept as one, and the flow of the cooling liquid can be adjusted by increasing or decreasing the cross-sectional area. flow.
- the distance between the first meter-in orifice 31a and the total inlet 10a is smaller than the distance between the first meter-out orifice 31b and the total outlet 10b, so that the cooling liquid entering the inlet confluence pipeline 20a can flow into the In the first branch 31 , the cooling liquid is easy to enter the first branch 31 , and the resistance of the cooling liquid entering the first branch 31 is reduced.
- the cross-sectional area of the first throttle-out opening 31b is equal to the cross-sectional area of the first throttle-in opening 31a, so as to facilitate processing and molding.
- the cross-sectional area of the first meter-out orifice 31b can be set larger than the cross-sectional area of the first meter-in orifice 31a.
- the first branch 31 has opposite first sides 311 and second sides 312 in the first direction X. As shown in FIG. In this embodiment, the first side 311 is closer to the main inlet and the main outlet than the second side 312 . Of course, in other embodiments, it may also be that the second side 312 is closer to the main inlet and the main outlet than the first side 311 .
- a confluence cavity 30a Between the ends of the plurality of first sub-branches 310 and the first meter-in orifice 31a is formed a confluence cavity 30a, along the direction from the first side 311 to the second side 312, the confluence cavity 30a is in the second direction Y
- the upper dimension gradually decreases, so that the junction cavity 30a has a substantially triangular wedge-shaped structure.
- the first meter-in orifice 31a is located at a position where the inlet-combining chamber 30a has a larger size in the second direction Y, that is, the first meter-in orifice 31a is located near the first side 311, and the inlet-combining chamber 30a is near the first side 311.
- the space at the throttle opening 31 a is large, so that the cooling liquid can easily enter the first branch 31 , reducing the flow resistance into the first branch 31 .
- a confluence cavity 30b is formed between the ends of the plurality of first sub-branches 310 and the first throttle orifice 31b.
- the confluence cavity 30b is in the second direction Y
- the dimension on the top gradually increases, so that the junction cavity 30b exits a substantially triangular wedge-shaped structure.
- the first throttle opening 31 b is located at a position where the size of the manifold outlet 30 b is larger in the second direction Y, that is, the first throttle opening 31 b is located near the second side 312 .
- the outlet confluence chamber 30b has a larger space near the first outlet orifice 31b, so that the cooling liquid is easy to converge to the position of the outlet confluence chamber 30b close to the first outlet orifice 31b, which in turn facilitates the cooling liquid from the first outlet
- the flow port 31b flows out into the outlet confluence pipeline 20b , reducing the flow resistance of the cooling liquid when it flows out from the first branch 31 .
- the first sub-branch 310 on one side 311 has a larger inlet and a smaller outlet
- the first sub-branch 310 near the second side 312 has a smaller inlet and a larger outlet, which can ensure that the cooling liquid flows in different first sub-branches.
- the flow rates of 310 are substantially the same, so as to ensure the balance of cooling liquid flow in each first sub-branch 310 .
- the branch closest to the external interface is the first branch in this embodiment, in which the number of sub-branches is the largest, and in this branch, the inlet and outlet chambers are both It is wedge-shaped to ensure the balance between multiple sub-branches, while in other branches, such as the second branch and the third branch, the number of sub-branches is relatively small, and both the inlet and outlet cavity and the outlet and return cavity are set Just be square.
- One end of the second branch 32 is connected to the inlet confluence pipeline 20a through two second meter-in ports 32a, and the other end is connected to the outlet confluence pipeline 20b through two second meter-out ports 32b.
- a plurality of second sub-branches 321 are disposed in the second branch 32 .
- One end of the third branch 33 is connected to the inlet confluence pipeline 20a through three third throttle inlets 33a, and the other end is connected to the outlet confluence pipeline 20b through three third throttle outlets 33b.
- a plurality of third sub-branches 331 are arranged in the third branch 33 .
- the first meter-in orifice 31a, the second meter-in orifice 32a, and the third meter-in orifice 33a have the same aperture, that is, the cross-sectional area. Since the first meter-in orifice 31a is one , the second meter-in orifice 32a is two, the third meter-in orifice 33a is three, the total cross-sectional area of a first meter-in orifice 31a, the total cross-section of two second meter-in orifices 32a The area and the total cross-sectional area of the three third inlet orifices 33a increase sequentially, that is, the total cross-sectional area of several orifices close to the branch of the total inlet 10a is smaller than that of several orifices far from the branch of the total inlet 10a The total cross-sectional area, by gradually increasing the total cross-sectional area of several orifices in the branch away from the main inlet 10a, can reduce the flow resistance into the
- the throttling is performed according to the distance between the branch road and the total inlet 10a.
- the quantity design can reduce the flow resistance of the cooling liquid entering the branch away from the main inlet 10a, which is convenient for structural layout design.
- the number of the second meter-in orifice 32a and the third meter-in orifice 33a can be one.
- the cross-sectional area of the first meter-in orifice 31a and the diameter of the third meter-in orifice 33a, that is, the cross-sectional area, are larger than the cross-sectional area of the second meter-in orifice 32a.
- the cross-sectional area of the three can also be gradually increased to further reduce the inflow.
- the diameters of the first throttle opening 31b, the second throttle opening 32b, and the third throttle opening 33b have the same cross-sectional area, since the first throttle opening 31b is one , the second meter-out orifice 32b is two, the third meter-out orifice 33b is three, the total cross-sectional area of a first meter-out orifice 31b, the total cross-sectional area of two second meter-out orifices 32b
- the area and the total cross-sectional area of the three third throttle outlets 33b increase sequentially, that is, the total cross-sectional area of several throttles in the branches close to the main outlet 10b is smaller than that of several throttles in the branches far away from the main outlet 10b
- the total cross-sectional area by gradually increasing the total cross-sectional area of several orifices in the branch away from the main outlet 10b, can reduce the flow resistance of the branch away from the main outlet 10b.
- the throttling is performed according to the distance between the branch road and the total outlet 10b.
- the design of the number of ports can reduce the flow resistance of the cooling liquid flowing out of the branch away from the main outlet 10b, which is convenient for structural layout design.
- the number of the second throttle orifice 32b and the third throttle orifice 33b may both be one.
- the cross-sectional area of the first throttle port 31b and the aperture diameter of the third throttle port 33b, that is, the cross-sectional area, are larger than the cross-sectional area of the second throttle port 32b.
- the cross-sectional area of the three can be gradually increased to further reduce the outflow.
- the quantity of the first sub-branch 310 in the first branch 31 is greater than the quantity of the second sub-branch 321 in the second branch 32, and the quantity of the second sub-branch 321 in the second branch 32 is the same as that of the third branch.
- the number of third sub-branches 331 in 33 is the same. More specifically, in this embodiment, there are ten first sub-branches 310 , four second sub-branches 321 , and four third sub-branches 331 . Of course, the number of the first sub-branch 310 , the second sub-branch 321 , and the third sub-branch 331 is not limited thereto, and other numbers can be set as required.
- the number of first sub-branches 310 of the first branch 31 closer to the main entrance 10a is relatively large, and the number of second sub-branches 321 and third sub-branches 331 relatively far from the main entrance 10a is relatively small , can reduce the flow resistance when the cooling liquid enters the second branch 32 and the third branch 33 .
- the width of the sub-branches in all branches is the same, that is, the cross-sectional area is the same, that is, the cross-sectional areas of the multiple first sub-branches 310, the multiple second sub-branches 321, and the multiple third sub-branches 331 are the same, which can
- the flow resistance of the cooling liquid in each sub-branch is the same, and the volume of the cooling liquid in multiple sub-branches is the same, so as to ensure the uniformity of heat dissipation at each position of the battery cold plate. It can be seen from the description of the aforementioned quantitative relationship that, in the first direction X, the size of the first branch 31 is larger than the size of the second branch 32 and the third branch 33 .
- a plurality of second flow guide bars 21b are disposed in the outlet confluence pipeline 20b, and the plurality of second flow guide bars 21b extend along the first direction X and are arranged at intervals.
- a plurality of second guide bars 21b extend along the first direction X, and the cooling liquid entering the inlet confluence pipeline 20a can flow along the second guide bars 21b by using the second guide bars 21b, that is, along the first direction X flow, thereby reducing the flow resistance of the cooling liquid in the inlet confluence pipeline 20a.
- a plurality of second guide bars 21b are arranged at intervals along the first direction X, and part of the cooling liquid can flow into the outlet confluence pipeline 20b in the gaps between the plurality of guide bars.
- An outlet chamber 11b is provided at the main outlet 10b, and the main outlet 10b communicates with the outlet confluence pipeline 20b through the outlet chamber 11b.
- the outlet chamber 11b is square, and a plurality of outlet protrusions 12b are arranged in the outlet chamber 11b, and the plurality of outlet protrusions 12b are arranged in an array, and the plurality of outlet protrusions 12b can also be used to divert the cooling liquid flowing out of the outlet chamber 11b to avoid The cooling liquid is too concentrated at this location and increases flow resistance.
- the battery cold plate includes a first plate body 100 and a second plate body 200 arranged in parallel, and both the first plate body 100 and the second plate body 200 are made of heat-conducting plates. into, in order to facilitate heat transfer.
- the first plate body 100 is punched to form a cavity 101 and a plurality of ribs 102 on the surface of the plate body.
- the plurality of ribs 102 are located in the cavity 101.
- the ribs 102 separate the cavity 101 to form a plurality of channels for cooling liquid to pass through.
- the pipeline that is, the cavity 101 can be divided into two confluence pipelines 20a/20b, multiple branches 31/32/33, and multiple sub-branches located in the branch.
- a plurality of butt joint holes 202 are provided on the second plate body 200, and the plurality of butt joint holes 202 are set correspondingly to the plurality of ribs 102, and the plurality of ribs 102 are abutted in the plurality of butt joint holes 202, so as to realize the connection between the first board body 100 and the plurality of ribs 102.
- the ribs 102 and the docking holes 202 can be an interference fit, so that the ribs 102 are closely connected with the joints, ensuring that the multiple branches 31/32/33 are isolated from each other, and preventing the cooling liquid from flowing between the branches .
- a thermally conductive sealant can be provided between the butt hole 202 and the rib 102 to further ensure that the connection between the two is sealed.
- the butt hole 202 is a through hole, so as to be formed by stamping.
- the outer surface is flush to facilitate bonding with the battery.
- the docking hole 202 may also be a blind hole.
- the butt hole 202 may not be provided on the second plate body 200 .
- an embodiment of the present disclosure also provides a battery system, the battery system includes a battery and the above-mentioned battery cold plate, the battery cold plate is attached to the battery, and the battery cold plate can dissipate heat from the battery through liquid cooling.
- the total inlet and outlet of the battery cold plate are placed in the middle of the cold plate, and after the cooling liquid enters the cold plate from the main inlet in the middle, it needs to flow to both sides.
- the cold plate flows out from the main outlet in the middle, so that the flow pipeline of the cooling liquid in the battery cold plate is roughly in a U-shaped structure.
- the confluence pipeline should be connected in parallel as much as possible, that is, multiple rows of guide bars should be set to reduce the resistance along the confluence pipeline.
- the number of branches is determined by matching the length of the confluence with the length of the branches.
- each road is designed according to the distance from the throttle port to the total inlet and the total outlet.
- the arrangement of the flow channel structure of the battery cold plate of the present disclosure minimizes the flow resistance in the same area of the battery cold plate under the same flow rate, thereby helping to reduce the power demand of the system for the water pump, thereby reducing the cost of the system, and at the same time ,
- the cold plate structure with low flow resistance can increase the flow of the battery cold plate as much as possible when the power of the water pump is constant, thereby reducing the temperature difference between the inlet and outlet.
- the external interface of the battery cold plate adopts a one-in-one-out structure, and the length of the converging pipeline is halved through the middle-in and middle-out import and export mode, and the shunt branch adopts The principle of maximization, the more parallel branches, the smaller the total flow resistance of the parallel pipeline, and then the flow resistance of the entire cold plate is designed to be the minimum.
- the flow resistance of the large cold plate under large flow can be minimized, and the flow of each branch can be evenly distributed by optimizing the diameter of the orifice, that is, the cross-sectional area, thereby improving the overall The heat transfer performance of the cold plate; with reduced flow resistance, the battery cold plate is suitable for a large-sized battery cold plate structure, which can reduce the power of the water pump, thereby reducing the cost of the vehicle system.
- the first flow guide bar 21a and the second flow guide bar 21b are named when they are arranged in different confluence pipelines, that is, multiple flow guide strips can be arranged in the confluence pipeline , a plurality of flow guide strips extend along the first direction X and are arranged at intervals.
- the cooling liquid entering the confluence pipeline can flow along the flow guide strips, that is, flow along the first direction X, thereby reducing the cooling liquid
- multiple guide strips can be arranged in one row or more than two rows.
- first branch 31, the second branch 32, and the third branch 33 are named according to different positions among the multiple branches, which can be understood as different specific branches. Method to realize. The same applies to the first sub-branch, the second sub-branch, and the third sub-branch.
- the first meter-in orifice 31a, the second meter-in orifice 32a, and the third meter-in orifice 33a are named according to the meter-in orifice on different branches,
- the first meter-out orifice 31b, the second meter-out orifice 32b, and the third meter-out orifice 33b are based on the names of the meter-out orifices on different branches,
- the number of meter-in ports and meter-out ports is equal to one.
- the meter-in ports can be set
- the distance between the main inlet 10a and the main outlet 10b is smaller than the distance between the throttle outlet and the main outlet 10b, so that the cooling liquid entering the inlet confluence pipeline 20a can flow into the branch for a short distance, making it easy for the cooling liquid to enter the In the branch, at the same time, the throttle inlet and the throttle outlet are respectively arranged on opposite sides of the branch, so that the cooling liquid entering the branch can flow through all the sub-branches.
- the number of throttle inlets and throttle outlets in the same branch can be the same, and the cross-sectional area of the throttle outlet can be set to be larger than the cross-sectional area of the throttle inlet, so as to reduce the size of the branch and the outlet manifold.
- the flow resistance between the channels, or the cross-sectional area of the outlet orifice and the cross-sectional area of the inlet orifice can be equal.
- the throttle inlet and the throttle outlet are different implementations of the throttle.
- the quantity and cross-sectional area design of the inlet orifice and the outlet orifice can control the flow and velocity of the cooling liquid entering the branch.
- the number of throttle openings on the branch near the external interface is smaller than the number of throttle openings on the branch away from the external interface, so that the cooling liquid can easily enter the branch away from the external interface.
- the cross-sectional area of each throttling port can be the same to facilitate processing, or the cross-sectional area of the throttling port on the branch road close to the external interface is smaller than the cross-sectional area of the throttle port on the branch road away from the external port, or it can be Make it easy for the cooling liquid to enter the branch away from the external interface.
- the inlet and outlet cavity 30a and the outlet cavity 30b are named according to the different locations of the inlet and outlet cavity, and are different implementations of the inlet and outlet cavity 30a and the outlet cavity 30b.
- the shape of the branch can be used not only for the first branch 31, but also for other branches.
- the shape of the manifold cavity is especially suitable for the case where both the inlet throttle port and the outlet throttle port are one on the branch road.
- a confluence cavity may be formed between the ends of the multiple sub-branches and the throttle port.
- the size of the confluence cavity in the second direction Y gradually decreases from being close to the throttle port to being far away from the throttle port. The small size makes it easy for the cooling liquid to enter and exit the branch circuit, reducing the flow resistance in and out of the branch circuit.
- the inlet cavity 11a and the outlet cavity are different implementations of the interface cavity, and an interface cavity may be provided at the external interface, and the external interface communicates with the confluence pipeline through the interface cavity.
- the interface cavity is square, and there are multiple protrusions arranged in an array in the inlet cavity 11a. The multiple protrusions can also be used to divert the cooling liquid entering and exiting the interface cavity, so as to avoid excessive concentration of the cooling liquid at this position and Increased resistance to flow.
- the number of sub-branches in the two branches located at both ends of the first direction X is slightly different.
- the sub-branches located at The number of sub-branches in the two branches can be set to be the same.
- the structure of the battery cold plate on both sides of the central axis It can be set as a completely symmetrical structure to ensure the same flow resistance on both sides.
- the number of branches is 6, and there are 3 branches on both sides of the middle position.
- the cooling liquid can enter from the main inlet in the middle position, flow toward both ends along the inlet confluence pipeline, and pass through the branches. After that, it flows back to the main outlet through the outlet confluence pipeline from both sides.
- the number of branches is not limited to this. Under the condition of sufficient space, as many branches as possible can be used for shunting.
- the number of branches can be designed according to the arrangement of battery cells or heat dissipation requirements, from The design angle of reducing the flow resistance, when determining the number of branches in the design: if the size of the battery cold plate in the first direction is greater than twice the size of the battery cold plate in the second direction, the number of branches is based on the heat dissipation of the battery cells In terms of demand, adopt multi-parallel branch design.
- add the fourth and fifth branches that is, increase the number of branches; if the size of the battery cold plate in the first direction is smaller than that of the battery
- the size of the cold plate in the second direction is twice that of the half of the length of the cold plate of the battery combined with the width of the sub-branch for branch design.
- the number of branches is six.
- the battery cold plate is square, and its size in the first direction is relatively larger than the size in the second direction, so the size in the first direction is the length of the battery cold plate, and the size in the second direction is the length of the battery cold plate Therefore, half the length of the cold plate of the battery is half of the size of the cold plate of the battery in the first direction.
- the sub-branch is strip-shaped along the second direction, it can be understood that the length of the sub-branch is its size in the second direction, and the width of the sub-branch is its size in the first direction, so that Further balance the channel flow resistance of the entire cold plate to improve the cooling and heat dissipation capacity.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
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Abstract
Description
Claims (20)
- 一种电池冷板,其特征在于,包括两个外接口、两个汇流管路、及多个支路;各所述汇流管路均沿第一方向延伸设置,两个所述外接口分别连通至两个所述汇流管路在所述第一方向上的中间位置;多个所述支路沿所述第一方向并排设置,且在第二方向上位于两个所述汇流管路之间;各所述支路在所述第二方向上的两端分别经至少一个节流口连通至两个所述汇流管路;所述第一方向与所述第二方向为两个相互垂直的方向;靠近所述外接口的支路上的节流口总横截面面积小于远离所述外接口的支路上的节流口总横截面面积;所述支路内沿第一方向排布有多条子支路,各所述子支路沿第二方向延伸设置,同一所述支路内的多条子支路的端部连通,所有所述子支路的横截面面积相同。
- 根据权利要求1所述的电池冷板,其特征在于,靠近所述外接口的支路上的节流口数量小于远离所述外接口的支路上的节流口数量。
- 根据权利要求1所述的电池冷板,其特征在于,靠近所述外接口的支路上的节流口数量等于远离所述外接口的支路上的节流口数量。
- 根据权利要求2所述的电池冷板,其特征在于,各所述节流口的横截面面积是相同的。
- 根据权利要求1至3任一项所述的电池冷板,其特征在于,靠近所述外接口的支路上的节流口横截面面积小于远离所述外接口的支路上的节流口横截面面积。
- 根据权利要求1至5任一项所述的电池冷板,其特征在于,靠近所述外接口的支路内的子支路数量大于远离所述外接口的支路内的子支路数量。
- 根据权利要求1至6任一项所述的电池冷板,其特征在于,所有支路中的所有子支路的横截面积相同。
- 根据权利要求1至7任一项所述的电池冷板,其特征在于,两个所述外接口分别为总进口与总出口,两个所述汇流管路分别为进口汇流管路与出口汇流管路,所述总进口、所述进口汇流管路、多个所述支路、所述出口汇流管路、及所述总出口依次连通,所述支路与所述进口汇流管路之间的节流口为进节流口,所述支路与所述出口汇流管路之间的节流口为出节流口。
- 根据权利要求8所述的电池冷板,其特征在于,在同一所述支路中的进节流口与出节流口的数量相同,所述出节流口的横截面面积大于或等于所述进节流口的横截面面积。
- 根据权利要求8或9所述的电池冷板,其特征在于,靠近所述总进口的支路上包括第一进节流口和第一出节流口,所述第一进节流口与所述总进口之间的距离小于所述第一出 节流口与所述总出口之间的距离。
- 根据权利要求8至10任一项所述的电池冷板,其特征在于,在一所述支路中,所述支路在所述第一方向上具有相对的第一侧和第二侧,多个所述子支路的端部与所述进节流口之间形成有进汇流腔,多个所述子支路的端部与所述出节流口之间形成有出汇流腔;沿所述第一侧至第二侧的方向,所述进汇流腔在第二方向上的尺寸逐渐减小,所述出汇流腔在第二方向上的尺寸逐渐增大;所述进节流口位于所述进汇流腔在第二方向上的尺寸较大的位置处;所述出节流口位于所述出汇流腔在第二方向上的尺寸较大的位置处。
- 根据权利要求8至11任一项所述的电池冷板,其特征在于,总进口处设置有进口腔,所述总进口经所述进口腔与所述进口汇流管路连通,所述进口腔内设置有多个进口凸起,所述多个进口凸起阵列排布。
- 根据权利要求8至12任一项所述的电池冷板,其特征在于,总出口处设置有出口腔,所述总出口经所述出口腔与所述出口汇流管路连通,所述出口腔内设置有多个出口凸起,所述多个出口凸起阵列排布。
- 根据权利要求8至13任一项所述的电池冷板,其特征在于,所述进口汇流管路内设置有多个第一导流条,所述多个第一导流条沿第一方向延伸及间隔排布。
- 根据权利要求14所述的电池冷板,其特征在于,所述多个第一导流条沿第二方向排列成一排或多排。
- 根据权利要求1至15任一项所述的电池冷板,其特征在于,以两个所述外接口的中心所在位置的连线为中轴线,所述电池冷板在所述中轴线两侧的结构是对称的。
- 根据权利要求1至16任一项所述的电池冷板,其特征在于,所述电池冷板包括第一板体和与第一板体相对的第二板体,所述第一板体在表面形成腔体及多个凸筋,所述多个凸筋位于所述腔体,所述凸筋将所述腔体分隔形成所述两个汇流管路、所述多个支路、及所述多条子支路,所述第二板体上设置多个对接孔,所述多个对接孔与所述多个凸筋对应设置,所述多个凸筋抵接于所述多个对接孔内,以便实现第一板体与第二板体之间的定位连接。
- 根据权利要求17所述的电池冷板,其特征在于,所述多个凸筋与所述多个对接孔为过盈配合。
- 根据权利要求17或18所述的电池冷板,其特征在于,所述对接孔为通孔。
- 一种电池系统,其特征在于,包括电池及权利要求1-19任一项所述的电池冷板,所述电池冷板贴合于所述电池。
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JP2023559038A JP2024518247A (ja) | 2021-06-30 | 2022-06-07 | 電池冷却プレート及び電池システム |
KR1020237032714A KR20230148362A (ko) | 2021-06-30 | 2022-06-07 | 배터리 냉각판 및 배터리 시스템 |
EP22831632.9A EP4300659A4 (en) | 2021-06-30 | 2022-06-07 | BATTERY COOLING PLATE AND BATTERY SYSTEM |
CA3213990A CA3213990A1 (en) | 2021-06-30 | 2022-06-07 | Battery cold plate and battery system |
US18/475,602 US20240030513A1 (en) | 2021-06-30 | 2023-09-27 | Battery cooling plate, and battery system |
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CN202110741232.2 | 2021-06-30 | ||
CN202110741232.2A CN115548504B (zh) | 2021-06-30 | 2021-06-30 | 电池冷板及电池系统 |
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US18/475,602 Continuation US20240030513A1 (en) | 2021-06-30 | 2023-09-27 | Battery cooling plate, and battery system |
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EP (1) | EP4300659A4 (zh) |
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KR (1) | KR20230148362A (zh) |
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EP4300659A1 (en) | 2024-01-03 |
US20240030513A1 (en) | 2024-01-25 |
CN115548504B (zh) | 2024-10-11 |
JP2024518247A (ja) | 2024-05-01 |
CN115548504A (zh) | 2022-12-30 |
CA3213990A1 (en) | 2023-01-05 |
KR20230148362A (ko) | 2023-10-24 |
EP4300659A4 (en) | 2024-10-16 |
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