Visual experiment device and method for simulating motion trail of bubbles in battery runner

Abstract

The embodiment of the invention provides a visual experiment device and method for simulating the motion trail of bubbles in a battery runner. Wherein the visual experiment device comprises a visual flow field plate, a gas injection component, an elastic block and a feeding component. The circumferential direction of the visual flow field plate is sealed, the visual flow field plate is internally provided with a gas injection port, a liquid inlet, a liquid outlet and a flow field runner for communicating the liquid inlet with the liquid outlet, and the gas injection port is communicated with the flow field runner; the air injection port is filled with the elastic block in a sealed mode, and the air injection component is used for penetrating through the elastic block and injecting air into the flow field runner to form bubbles; the feeding component is communicated with the liquid inlet through a pipeline so as to inject cooling liquid into the flow field flow channel. The flow field flow channel is arranged on the visual flow field plate, so that the movement track and retention condition of bubbles can be directly and visually observed, and support is provided for research, development and design of the cooling side flow channel.

Description

Technical Field

[0001] The invention relates to the technical field of batteries, and in particular to a visual experimental device for simulating the movement trajectory of bubbles in a battery flow channel and a visual experimental method for observing the movement trajectory of bubbles using the visual experimental device. Background Art

[0002] In the field of fuel cell bipolar plates, the cooling water or coolant in the cooling side flow channel has good thermal conductivity and plays an important role in temperature control during the operation of the fuel cell. Taking cooling water as the coolant as an example, in actual situations, there are a few bubbles in the cooling side flow channel in addition to liquid water. Due to the significant difference in the heat transfer characteristics of gas and liquid water, the heat transfer is slow at the bubbles, and there is a risk of local hot spots, which in turn leads to reduced fuel cell performance. Therefore, it is urgent to evaluate and optimize the bubble situation on the cooling side during the research and development process. However, how to accurately restore and observe the direction and aggregation of bubbles on the cooling side, and then how to design the cooling side flow channel and injection parameters, does not have a positive feedback effect. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of the present invention provides a visual experimental device for simulating the movement trajectory of bubbles in a battery flow channel. The visual experimental device can intuitively observe the movement trajectory and retention of bubbles, providing support for the research and development design of the cooling side flow channel.

[0004] The embodiment of the present invention further provides a method for visualizing the movement trajectory of bubbles in the battery flow channel.

[0005] The visualized experimental device for simulating the movement trajectory of bubbles in a battery flow channel according to an embodiment of the present invention comprises a visualized flow field plate, a gas injection component, an elastic block and a feeding component.

[0006] The visualized flow field plate is provided with a circumferential seal, and is provided with an air injection port, a liquid inlet, a liquid outlet, and a flow field channel connecting the liquid inlet and the liquid outlet, wherein the air injection port is connected with the flow field channel; the elastic block is sealed and filled on the air injection port, and the air injection component is used to pass through the elastic block and inject gas into the flow field channel to form bubbles; the feeding component is connected with the liquid inlet through a pipeline to inject coolant into the flow field channel.

[0007] The visualization experimental device for simulating the movement trajectory of bubbles in the battery flow channel of the embodiment of the present invention is provided with a flow field flow channel on a visualization flow field plate, and the flow field flow channel is used to simulate the shape and size of the cooling side flow channel of the fuel cell, and a coolant is injected into the flow field flow channel through the liquid inlet to form a simulation process of battery injection. And the gas injection component is used to inject gas into the flow field flow channel to form bubbles to simulate the bubbles in the cooling side flow channel during the battery injection process. Under this condition, the coolant is injected into the flow field flow channel through the feeding component, and while ensuring the sealing and accurately restoring the distribution of bubbles on the cooling side, the movement trajectory and retention of the bubbles can be directly observed visually, with high visibility, and the position and movement trajectory of the bubbles in the cooling side flow channel can be effectively simulated and observed, providing support for the research and development design of the cooling side flow channel. If the bubbles are retained in a certain place for many times, the shape of the airway can be adjusted in the later stage to improve the discharge rate of the bubbles. For example, the shape or size of this part is specially designed to avoid the problem of bubbles being retained in the flow field flow channel. The accurate restoration of the distribution of bubbles in the cooling side flow channel is achieved.

[0008] Therefore, the visualization experimental device for simulating the movement trajectory of bubbles in the battery flow channel of the embodiment of the present invention can intuitively observe the movement trajectory and retention of the bubbles, providing support for the research and development design of the cooling side flow channel.

[0009] In some embodiments, the visualization flow field plate includes a first plate body and a second plate body, at least one of the first plate body and the second plate body is a visualization plate body; at least one of the first plate body and the second plate body has a flow channel groove, and the first plate body and the second plate body are arranged in affixed manner so that the flow channel groove forms the flow field flow channel;

[0010] In other embodiments, the visualization flow field plate includes a first plate body and a second plate body, at least one of the first plate body and the second plate body is a visualization plate body, at least one of the first plate body and the second plate body has a protrusion, adjacent protrusions form a flow channel groove, the protrusion of the first plate body and the second plate body are arranged in a fit so that the flow channel groove forms the flow field flow channel.

[0011] In some embodiments, both the first plate body and the second plate body have the flow channel groove, the flow channel groove of the first plate body and the flow channel groove of the second plate body are alternately arranged along the direction from the liquid inlet to the liquid outlet, a first cooling shunt channel is formed between the flow channel groove of the first plate body and the second plate body, and a second cooling shunt channel is formed between the flow channel groove of the second plate body and the first plate body, and adjacent first cooling shunt channels and second cooling shunt channels are alternately connected in sequence to form the flow field channel.

[0012] In some embodiments, the flow channel is in a straight line, a folded line, or a wavy line.

[0013] In some embodiments, the area where the flow channel grooves are provided in the first plate body and the second plate body is at least 10 mm×10 mm.

[0014] In some embodiments, the first plate body and the second plate body are bonded and sealed.

[0015] In some embodiments, the first plate and the second plate are glass plates or acrylic plates.

[0016] In some embodiments, the flow channel groove is a photolithography groove or a wet etching groove, and the cross section of the flow channel groove is a rounded groove.

[0017] In some embodiments, the gas injection component is one of rubber, silicone or PDMS.

[0018] In some embodiments, there are a plurality of gas injection ports, and the plurality of gas injection ports are disposed on the visualization flow field plate at intervals.

[0019] In some embodiments, the spacing between adjacent gas injection ports is greater than 3 mm, and at least one gas injection port is disposed in the region of the flow channel groove.

[0020] In some embodiments, the experimental device for visualizing the movement trajectory of bubbles in a battery flow channel further includes a clamping component, which is coated on the circumference of the visualized flow field plate to seal the circumference of the visualized flow field plate.

[0021] In some embodiments, the clamping component includes a detachable front clamp and a rear clamp, at least one of the front clamp and the rear clamp is provided with an observation window, or at least one side of the front clamp and the rear clamp is a transparent plate, and one side of at least one of the front clamp and the rear clamp has a receiving groove, and the receiving groove is arranged along the circumference of the observation window so as to form a receiving cavity for accommodating the visualization flow field plate, the peripheral edge of the visualization flow field plate is arranged in the receiving cavity, and the part of the visualization flow field plate forming the flow field channel is arranged corresponding to the observation window.

[0022] In some embodiments, the parts of the front splint and the rear splint where the accommodating groove is arranged have a liquid inlet interface and a liquid outlet interface, and the liquid inlet interface and the liquid inlet port are arranged relative to each other in the thickness direction of the visualization flow field plate, and the liquid outlet interface and the liquid outlet port are arranged relative to each other in the thickness direction of the visualization flow field plate.

[0023] In some embodiments, the plate body portion of the front splint and the plate body portion of the rear splint are in contact with each other, the gas injection port and the liquid outlet are relatively arranged along the height direction of the visualization flow field plate, and the front splint and the rear splint have a support seat on one side in the height direction of the visualization flow field plate.

[0024] The method of the experimental device for visualizing the movement trajectory of bubbles in a battery flow channel according to any one of the above embodiments of the present invention comprises the following steps:

[0025] Open the feeding component to fill the flow field channel with coolant, and close the feeding component;

[0026] The needle of the gas injection component is inserted into the elastic block and connected to the flow field flow channel, the gas injection component is opened to produce bubbles, and the gas injection component is closed;

[0027] The feeding component is opened again, and the discharge of the bubbles in the flow field flow channel is observed through the visual flow field plate; different setting indicators are changed to measure the movement trajectory and retention of the bubbles in the flow field flow channel under different conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view of a visualization experimental device for simulating the movement trajectory of bubbles in a battery flow channel according to an embodiment of the present invention.

[0029] Figure 2 It is a reverse side view of a visualization experimental device for simulating the movement trajectory of bubbles in a battery flow channel according to an embodiment of the present invention.

[0030] Figure 3 Schematic diagram of the assembly of the clamping component of the embodiment of the present invention

[0031] Figure 4 2 is a perspective view of a front clamping plate according to an embodiment of the present invention.

[0032] Figure 5 It is a schematic diagram of a side of the front splint close to the rear splint of an embodiment of the present invention.

[0033] Figure 6 It is a schematic diagram of a side of the front splint away from the rear splint according to an embodiment of the present invention.

[0034] Figure 7 Schematic diagram of a first plate body according to an embodiment of the present invention.

[0035] Figure 8 Schematic diagram of a second plate body according to an embodiment of the present invention.

[0036] Fig. 9 It is a physical picture of the visualization experiment device of the embodiment of the present invention.

[0037] Fig.10 It is an experimental state diagram of a visual experimental device for simulating the movement trajectory of bubbles in a battery flow channel according to an embodiment of the present invention, in which the coolant enters from the bottom and exits from the top.

[0038] Fig.11 It is an experimental state diagram of a visual experimental device for simulating the movement trajectory of bubbles in a battery flow channel according to an embodiment of the present invention, in which the coolant enters from the top and exits from the bottom.

[0039] Fig.12 It is a schematic diagram of the corresponding positions of bubbles in a simulated battery flow channel on a visualized flow field plate according to an embodiment of the present invention.

[0040] Fig.13 It is an embodiment of the present invention that simulates the influence of bubbles at different positions in the battery flow channel under different liquid inlet methods, at a reference flow rate.

[0041] Fig.14 It is an embodiment of the present invention that simulates the liquid inlet flow rate in the battery flow channel, the influence of bubbles at different positions on different liquid inlet methods, and the bubbles are completely discharged.

[0042] Reference numerals:

[0043] Visualized flow field plate 1; first plate body 11; second plate body 12; flow channel groove 121;

[0044] Gas injection port 101; liquid inlet 102; liquid outlet 103; flow field channel 104;

[0045] Gas injection component 2;

[0046] Elastic block 3;

[0047] Feeding component 4;

[0048] Clamping component 5; front clamping plate 51; rear clamping plate 52; support seat body 53; liquid inlet interface 501; liquid outlet interface 502; accommodating groove 503; observation window 504. DETAILED DESCRIPTION

[0049] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0050] Reference below Figure 1-Figure 13 A visualization experimental device and method for simulating the motion trajectory of bubbles in a battery flow channel according to an embodiment of the present invention are described.

[0051] The visualized experimental device for simulating the movement trajectory of bubbles in a battery flow channel according to an embodiment of the present invention comprises a visualized flow field plate 1 , a gas injection component 2 , an elastic block 3 and a feeding component 4 .

[0052] The visualized flow field plate 1 is provided with a circumferential seal, and is provided with a gas injection port 101, a liquid inlet 102, a liquid outlet 103, and a flow field channel 104 connecting the liquid inlet 102 and the liquid outlet 103, wherein the gas injection port 101 is connected with the flow field channel 104; the elastic block 3 is sealed and filled on the gas injection port 101, and the gas injection component 2 is used to pass through the elastic block 3 and inject gas into the flow field channel 104 to form bubbles; the feeding component 4 is connected with the liquid inlet 102 through a pipeline to inject coolant into the flow field channel 104.

[0053] The visualization experimental device for simulating the movement trajectory of bubbles in the battery flow channel of the embodiment of the present invention is provided with a flow field flow channel 104 on the visualization flow field plate 1. The flow field flow channel 104 is used to simulate the shape and size of the cooling side flow channel of the fuel cell, and coolant is injected into the flow field flow channel 104 through the liquid inlet 102 to form a simulation process of battery injection. And the gas injection component 2 is used to inject gas into the flow field flow channel 104 to form bubbles to simulate the bubbles in the cooling side flow channel during the battery injection process. Under this condition, coolant is injected into the flow field flow channel 104 through the feeding component 4, while ensuring the sealing and accurately restoring the distribution of bubbles in the cooling side of the battery, so as to directly observe the movement trajectory and retention of the bubbles. It has a high degree of visibility, can effectively simulate and observe the position and movement trajectory of the bubbles in the cooling side flow channel, and provide support for the research and development design of the cooling side flow channel. If the bubbles are retained in a certain place for many times, the shape of the airway can be adjusted in the later stage to improve the discharge rate of the bubbles. For example, the shape or size of the part is specially designed to avoid the problem of bubbles being retained in the flow field flow channel 104. The accurate restoration of the bubble distribution in the cooling side flow channel is achieved.

[0054] Therefore, the visualization experimental device for simulating the movement trajectory of bubbles in the battery flow channel of the embodiment of the present invention can intuitively observe the movement trajectory and retention of the bubbles, providing support for the research and development design of the cooling side flow channel.

[0055] Specifically, the flow field channels 104 match the size and shape of the cooling side channels of the fuel cell.

[0056] Optionally, the gas injection component 2 includes a syringe pump, an air guide tube and an injection head, the syringe pump is connected to the injection head through the air guide tube, and when bubbles need to be formed, the injection head is inserted into the elastic block 3, and the syringe pump is turned on to inject gas into the flow field flow channel 104 to form bubbles. Further, the syringe pump is a micro syringe pump.

[0057] like Figure 1 and Figure 2As shown, the visualized flow field plate 1 includes a first plate body 11 and a second plate body 12, at least one of the first plate body 11 and the second plate body 12 is a visualized plate body; at least one of the first plate body 11 and the second plate body 12 has a flow channel groove 121, and the first plate body 11 and the second plate body 12 are arranged in affixed manner so that the flow channel groove 121 forms a flow field flow channel 104. It can be understood that one of the first plate body 11 and the second plate body 12 is a visualized plate body; both of the first plate body 11 and the second plate body 12 are visualized plates. For example, the first plate body 11 has a flow channel groove 121, and the flow channel groove 121 on the first plate body 11 is partially fitted with the plate body of the second plate body 12 to form the flow field flow channel 104. Similarly, the flow channel groove 121 on the second plate body 12 can also be fitted with the plate body of the first plate body 11 to form the flow field flow channel 104.

[0058] The visualization experimental device for simulating the movement trajectory of bubbles in a battery flow channel according to an embodiment of the present invention is formed by dividing the visualization flow field plate 1 into a first plate body 11 and a second plate body 12, and forming a flow channel 104 through flow channel grooves 121 on corresponding plates (first plate body 11 and second plate body 12). Therefore, the visualization experimental device has the advantage of a relatively simple structure.

[0059] Optionally, the gas injection port 101 and the liquid inlet 102 can be arranged on the first plate body 11, and the liquid outlet 103 can be arranged on the second plate body 12. However, the gas injection port 101, the liquid inlet 102 and the liquid outlet 103 are not limited thereto and can be arranged interchangeably. Alternatively, they can all be arranged on the first plate body 11 or the second plate body 12.

[0060] The embodiments of the present invention are not limited thereto. For example, in other embodiments, the visualized flow field plate 1 includes a first plate body 11 and a second plate body 12, at least one of the first plate body 11 and the second plate body 12 is a visualized plate body, at least one of the first plate body 11 and the second plate body 12 has a protrusion (not shown), adjacent protrusions form a flow channel groove 121, and the protrusion of the first plate body 11 and the second plate body 12 are arranged in a close fit so that the flow channel groove 121 forms a flow field flow channel 104. Similarly, the visualized experimental device has the advantage of a relatively simple structure.

[0061] like Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, both the first plate body 11 and the second plate body 12 have flow channel grooves 121, and the flow channel grooves 121 of the first plate body 11 and the flow channel grooves 121 of the second plate body 12 are alternately arranged along the direction from the liquid inlet 102 to the liquid outlet 103 to form a mesh flow field channel 104, a first cooling shunt channel is formed between the flow channel grooves 121 of the first plate body 11 and the second plate body 12, and a second cooling shunt channel is formed between the flow channel grooves 121 of the second plate body 12 and the first plate body 11, and adjacent first cooling shunt channels and second cooling shunt channels are alternately connected in sequence to form a flow field channel 104.

[0062] The visualization experimental device for simulating the movement trajectory of bubbles in the flow channel of a battery according to an embodiment of the present invention is provided with flow channel grooves 121 on the first plate 11 and the second plate 12, and the flow channel grooves 121 of the first plate 11 and the flow channel grooves 121 of the second plate 12 are staggered along the direction from the liquid inlet 102 to the liquid outlet 103 to form a mesh flow field flow channel 104. This helps to improve the passing rate of the coolant in the flow field flow channel 104 area, and helps to simulate the bubble movement trajectory and retention situation of the complex flow field flow channel 104 in one step. In addition, the bubble movement trajectory and retention situation of the cooling side flow channel of the reaction battery can be more realistic. Therefore, the visualization experimental device has the advantage of high experimental accuracy.

[0063] Furthermore, the flow channel groove 121 of the first plate body 11 and the flow channel groove 121 of the second plate body 12 are staggered along the direction from the liquid inlet 102 to the liquid outlet 103 .

[0064] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the flow channel groove 121 is in a straight line, a folded line or a wavy line. Thus, the path length of the flow field flow channel 104 can be extended. Thus, the visual experimental device helps to further improve the accuracy of the experiment.

[0065] The flow channel 121 is preferably in a zigzag or wavy line shape.

[0066] Furthermore, the first plate 11 has a plurality of flow channel grooves 121, and the plurality of flow channel grooves 121 are arranged along the flow field flow channel 104. Figure 1 The flow channel groove 121 may be a W-shaped folded line, and the flow channel groove 121 on the second plate body 12 also has a plurality of flow channel grooves 121 along the flow field flow channel 104. Figure 1 As shown in the figure, the flow channel grooves 121 of the first plate body 11 and the flow channel grooves 121 of the second plate body 12 are arranged spaced apart in the upper and lower directions, and they intersect in the thickness direction of the visualized flow field plate 1 so that the flow channel grooves 121 of the first plate body 11 and the flow channel grooves 121 of the second plate body 12 are connected to form a network structure.

[0067] The area where the flow channel groove 121 is set in the first plate body 11 and the second plate body 12 is at least 10 mm×10 mm, which helps to prevent the problem that the flow field flow channel 104 path is too short due to the area being too small and cannot truly feedback the bubble movement trajectory and retention situation.

[0068] The cross section of the flow channel groove 121 is a rounded groove. Therefore, the visualization experiment device has the advantage of high processing convenience.

[0069] The first plate body 11 and the second plate body 12 are bonded and sealed. Therefore, the visualization experiment device has the advantage of good sealing effect.

[0070] The first plate body 11 and the second plate body 12 are glass plates or acrylic plates.

[0071] Optionally, when the visualized flow field plate 1 is an optical glass plate, the flow channel groove 121 is photolithography / wet etching, and the first plate body 11 and the second plate body 12 are sealed by high temperature and low pressure bonding. This method has a small deformation degree, and the deformation is small while ensuring the sealing. In addition, the optical glass plate has high visibility, which is convenient for clearly recording the trajectory of the bubble. The visualized flow field plate 1 can also be an acrylic plate, and the flow channel groove 121 is a CNC machined groove. The first plate body 11 and the second plate body 12 are sealed by low temperature and high pressure bonding.

[0072] like Figure 7 and Fig.12 As shown, there are a plurality of gas injection ports 101 , and the plurality of gas injection ports 101 are arranged on the visualization flow field plate 1 at intervals.

[0073] The visualization experimental device for simulating the movement trajectory of bubbles in a battery flow channel of an embodiment of the present invention, by setting a plurality of gas injection ports 101 spaced apart on a visualization flow field plate 1, can form bubbles at a plurality of sites through different gas injection ports 101, simulate bubbles in a plurality of flow field channels 104, and further truly reflect the bubble retention points at a plurality of sites, further improving the movement trajectory and retention conditions of the bubbles.

[0074] The distance between adjacent gas injection ports 101 is greater than 3 mm, and at least one gas injection port 101 is disposed in the region of the flow channel groove 121 .

[0075] The gas injection component 2 is one of rubber, silicone or PDMS (polydimethylsiloxane). PDMS is an elastomer with its stretchable and bendable properties and excellent biocompatibility. It ensures the sealing without affecting the visualization effect, and realizes the accurate restoration of the bubble distribution of the cooling side flow channel, which serves as the interface for needle puncture and gas inlet.

[0076] Optionally, the gas injection component can be made of a transparent material, such as transparent rubber or transparent silicone.

[0077] like Figure 1 and Figure 2 As shown, the visualization experimental device for simulating the movement trajectory of bubbles in a battery flow channel according to an embodiment of the present invention further includes a clamping component 5 , which is coated on the circumference of the visualization flow field plate 1 to seal the circumference of the visualization flow field plate 1 .

[0078] The visualized experimental device for simulating the movement trajectory of bubbles in a battery flow channel according to an embodiment of the present invention can clamp and seal the visualized flow field plate 1 by providing a clamping component 5, which is covered on the circumference of the visualized flow field plate 1. Therefore, the visualized experimental device has the advantages of good structural stability and good sealing performance.

[0079] like Figures 1 to 6 As shown, the clamping component 5 includes a detachable front clamp plate 51 and a rear clamp plate 52, an observation window 504 is opened on at least one of the front clamp plate 51 and the rear clamp plate 52, or at least one side of the front clamp plate 51 and the rear clamp plate 52 is a transparent plate, and at least one side of the front clamp plate 51 and the rear clamp plate 52 has a receiving groove 503, and the receiving groove 503 is arranged along the circumference of the observation window 504 so as to form a receiving cavity for accommodating the visualization flow field plate 1, the peripheral edge of the visualization flow field plate 1 is arranged in the receiving cavity, and the part of the visualization flow field plate 1 that forms the flow field channel 104 is arranged corresponding to the observation window 504.

[0080] The visualized experimental device for simulating the movement trajectory of bubbles in a battery flow channel according to the embodiment of the present invention is provided by dividing the clamping component 5 into a detachable front clamping plate 51 and a rear clamping plate 52, at least one of the front clamping plate 51 and the rear clamping plate 52 is provided with an observation window 504, and the portion of the visualized flow field plate 1 forming the flow field flow channel 104 is provided corresponding to the observation window 504. Therefore, the visualized experimental device has the advantage of a simple structure.

[0081] like Figures 1 to 6 As shown, the parts of the front clamping plate 51 and the rear clamping plate 52 where the accommodating groove 503 is set have a liquid inlet interface 501 and a liquid outlet interface 502, the liquid inlet interface 501 and the liquid inlet port 102 are arranged relative to each other in the thickness direction of the visualized flow field plate 1, and the liquid outlet interface 502 and the liquid outlet port 103 are arranged relative to each other in the thickness direction of the visualized flow field plate 1.

[0082] The visualization experimental device for simulating the movement trajectory of bubbles in a battery flow channel of an embodiment of the present invention has a liquid inlet interface 501 and a liquid outlet interface 502 on the portion where the accommodating groove 503 is set on the front clamping plate 51 and the rear clamping plate 52, which helps to improve the convenience of connecting the visualization flow field plate 1 with the feeding component 4.

[0083] like Figures 1 to 6 As shown, the plate body portion of the front clamping plate 51 and the plate body portion of the rear clamping plate 52 are fitted together, the gas injection port 101 and the liquid outlet port 103 are arranged relatively along the height direction of the visualized flow field plate 1, and the front clamping plate 51 and the rear clamping plate 52 are arranged in the height direction of the visualized flow field plate 1 ( Figure 1 A support seat 53 is provided on one side of the visual experiment device (in the up and down direction shown in FIG). Therefore, the visual experiment device can be stably placed on the experimental table by setting the base. Thus, the visual experiment device has the advantage of good structural stability.

[0084] Furthermore, the clamping component 5 is composed of a support seat body 53, a front splint 51 and a rear splint 52. The front splint 51 is provided with an observation window 504, a liquid inlet interface 501, a receiving groove 503 and a bolt hole; the rear splint 52 is provided with an observation window 504, a liquid outlet interface 502, a clamping groove and a bolt hole; and the support seat body 53 is also provided with a bolt hole. Among them, the positions of the liquid inlet interface 501 and the liquid outlet interface 502 can be flexibly changed according to experimental needs. The front and rear splints 52 are fixed to the support seat body 53 by bolts to clamp the visualization component in the receiving groove 503. The front and rear splints 52 and the base are both made of acrylic. During assembly, the liquid inlet 102 of the first plate body 11 is aligned with the liquid inlet interface 501 of the front splint 51, and the liquid outlet 103 of the second plate body 12 is aligned with the liquid outlet interface 502 of the rear splint 52.

[0085] The feeding component 4 includes a liquid feeding assembly, a peristaltic pump and a liquid inlet pipe. The peristaltic pump is connected to the liquid inlet 102 through the liquid inlet pipe. The liquid feeding assembly uses the peristaltic pump to make the coolant flow out of the peristaltic pump.

[0086] The method of the experimental device for visualizing the motion trajectory of bubbles in a battery flow channel according to any one of the above embodiments of the present invention is characterized by comprising the following steps:

[0087] Open the feeding component 4, so that the flow field flow channel 104 is filled with coolant, and close the feeding component 4;

[0088] The fine needle of the gas injection component 2 is inserted into the elastic block 3 and connected to the flow field channel 104, the gas injection component 2 is opened to produce bubbles, and the gas injection component 2 is closed;

[0089] Open the feeding component 4 again, and observe the discharge of bubbles in the flow field channel 104 through the visualized flow field plate 1; change different setting indicators (for example, the inlet and outlet directions of the feeding component 4, the flow rate of the feeding component 4 and the coolant model), and measure the movement trajectory and retention of bubbles in the flow field channel 104 under different conditions.

[0090] Optionally, the needle of the gas injection component 2 is a thin needle. Optionally, after the bubble is formed, a tape can be pasted on the needle hole.

[0091] Specifically, 1) First embodiment: Fig.10 As shown, before the experiment, the peristaltic pump of the feeding component 4 is turned on until the flow field channel 104 is filled with liquid water. The peristaltic pump is turned off, the microinjection pump of the gas injection component 2 is turned on, and small bubbles are made at a pre-set position using a fine needle, with an air intake of 100 μL, and then the microinjection pump is turned off. During the experiment, the peristaltic pump is turned on, and the coolant (liquid water) flows out from the liquid feeding assembly of the feeding component 4, enters the flow field channel 104 through the liquid inlet interface 501 below the observation window 504 and the liquid inlet of the front flow field plate, and flows from bottom to top (in from bottom and out from top), driving the bubbles in the channel to move upward, and finally the liquid water mixed with bubbles is discharged from the outlet pipeline through the outlet of the rear flow field plate above the observation window 504 and the liquid outlet interface 502 of the rear clamping plate 52. During the experiment, the cooling water flow rate (at the reference flow rate) is 50 mL / min, and a high-speed camera is used to record image data in order to evaluate and analyze the bubble situation in the cooling side channel under the bottom-in and top-out conditions.

[0092] The results show that at the baseline flow rate, most of the bubbles in the mainstream area are quickly discharged. When the flow rate increases to 150-160mL / min, only a few bubbles cannot be discharged. When the flow rate increases to 300mL / min, the bubbles are basically discharged.

[0093] 2) Second embodiment: Fig.11 As shown, the difference from Example 1 is that the liquid enters the flow field channel 104 through the liquid inlet interface 501 below the observation window 504 and the liquid inlet of the front flow field plate, and flows from top to bottom (in from top and out from bottom), driving the bubbles in the flow channel to move downward.

[0094] The results show that at the baseline flow rate, there are still a large number of bubbles in the mainstream area that cannot be discharged. As the flow rate increases, the bubbles are gradually discharged. When the flow rate increases to 350-400mL / min, the bubbles are basically discharged.

[0095] Furthermore, in the two modes of bottom-in-top-out and top-in-bottom-out, a single bubble is injected at the following 12 positions respectively. The positions of the 12 positions are as follows: Fig.12 As shown, record the flow rate at which the bubble starts to move and the flow rate at which it is completely removed. Fig.13 The conclusions are as follows: Fig.13 As shown, the positions where bubbles are difficult to be discharged by the bottom-in-top-out method are: 1, 2, 5, 9, 12. The positions where bubbles are difficult to be discharged by the top-in-bottom-out method are 1, 2, 3, 4, 5, 6, 8, 9, 12. When only the liquid inlet method is different, the bottom-in-top-out method is better than the top-in-bottom-out method.

[0096] Fig.14 As shown, in the top-in, bottom-out mode, the volume flow rate required to completely remove the bubbles (volume flow rate divided by the cross-sectional area is the flow rate) is significantly higher than that in the bottom-in, top-out mode, which means that increasing the flow rate helps to increase the amount of bubble discharge.

[0097] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0098] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0099] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0100] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0101] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0102] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A visual experimental device for simulating the motion trajectory of bubbles in a battery flow channel, characterized in that: include: A visual flow field plate, wherein the visual flow field plate is provided with a circumferential seal, and the visual flow field plate is provided with an air injection port, a liquid inlet, a liquid outlet, and a flow field flow channel connecting the liquid inlet and the liquid outlet, and the air injection port is connected to the flow field flow channel; A gas injection component and an elastic block, wherein the elastic block is sealed and filled on the gas injection port, and the gas injection component is used to pass through the elastic block and inject gas into the flow field flow channel to form bubbles; A feeding component is connected to the liquid inlet through a pipeline to inject experimental coolant into the flow field flow channel.

2. The visual experimental device for the movement trajectory of bubbles in a battery flow channel according to claim 1, characterized in that: The visualization flow field plate comprises a first plate body and a second plate body, and at least one of the first plate body and the second plate body is a visualization plate body; At least one of the first plate and the second plate has a flow channel, and the first plate and the second plate are arranged in close contact so that the flow channel forms the flow field flow channel; Alternatively, at least one of the first plate body and the second plate body has a protrusion, and adjacent protrusions form a flow channel groove, and the protrusion of the first plate body and the second plate body are arranged in contact with each other so that the flow channel groove forms the flow field flow channel.

3. The visual experimental device for the movement trajectory of bubbles in a battery flow channel according to claim 2, characterized in that: The first plate body and the second plate body are both provided with the flow channel grooves, the flow channel grooves of the first plate body and the flow channel grooves of the second plate body are staggered in the direction from the liquid inlet to the liquid outlet to form a mesh flow field flow channel, a first cooling shunt flow channel is formed between the flow channel grooves of the first plate body and the second plate body, a second cooling shunt flow channel is formed between the flow channel grooves of the second plate body and the first plate body, and adjacent first cooling shunt flow channels and second cooling shunt flow channels are alternately connected in sequence to form the flow field flow channel; And / or, the flow channel groove is in a straight line, a broken line or a wavy line shape; And / or, the area where the flow channel groove is arranged in the first plate body and the second plate body is at least 10 mm×10 mm.

4. The visual experimental device for the movement trajectory of bubbles in a battery flow channel according to claim 2, characterized in that: The first plate body and the second plate body are bonded and sealed; And / or, the first plate body and the second plate body are glass plates or acrylic plates; And / or, the flow channel groove is a photolithography groove or a wet etching groove, and the cross section of the flow channel groove is a rounded groove.

5. The visual experimental device for the movement trajectory of bubbles in a battery flow channel according to claim 1, characterized in that: The gas injection component is one of rubber, silicone or PDMS; And / or, there are multiple gas injection ports, and the multiple gas injection ports are arranged on the visualization flow field plate at intervals.

6. The visual experimental device for the movement trajectory of bubbles in a battery flow channel according to claim 5, characterized in that: The spacing between adjacent gas injection ports is greater than 3 mm, and at least one gas injection port is arranged in the region of the flow channel groove.

7. The visual experimental device for the movement trajectory of bubbles in a battery flow channel according to claim 1, characterized in that: It also includes a clamping component, which is covered on the circumference of the visualization flow field plate to seal the circumference of the visualization flow field plate.

8. The visual experimental device for the movement trajectory of bubbles in a battery flow channel according to claim 7, characterized in that: The clamping component includes a detachable front clamp plate and a rear clamp plate, at least one of which is provided with an observation window, or at least one side of the front clamp plate and the rear clamp plate is a transparent plate, and at least one side of the front clamp plate and the rear clamp plate has a receiving groove, and the receiving groove is arranged along the circumference of the observation window to form a receiving cavity for accommodating the visualization flow field plate, the peripheral edge of the visualization flow field plate is arranged in the receiving cavity, and the part of the visualization flow field plate that forms the flow field channel is arranged corresponding to the observation window.

9. The visual experimental device for the movement trajectory of bubbles in a battery flow channel according to claim 8, characterized in that: The front clamping plate and the rear clamping plate have a liquid inlet interface and a liquid outlet interface on the portion where the accommodating groove is arranged, wherein the liquid inlet interface and the liquid inlet are arranged opposite to each other in the thickness direction of the visualized flow field plate, and the liquid outlet interface and the liquid outlet are arranged opposite to each other in the thickness direction of the visualized flow field plate; And / or, the plate body portion of the front splint and the plate body portion of the rear splint are in contact with each other, the gas injection port and the liquid outlet are arranged relatively to each other along the height direction of the visualized flow field plate, and the front splint and the rear splint have a support seat on one side in the height direction of the visualized flow field plate.

10. A method for visualizing the movement trajectory of bubbles in a battery flow channel according to any one of claims 1 to 9, characterized in that: The steps include: Open the feeding component to fill the flow field flow channel with coolant, and close the feeding component; The needle of the gas injection component is inserted into the elastic block and connected to the flow field flow channel, the gas injection component is opened to produce bubbles, and the gas injection component is closed; The feeding component is opened again, and the discharge of the bubbles in the flow field channel is observed through the visualization flow field plate; different setting indicators are changed to measure the movement trajectory and retention of the bubbles in the flow field channel under different conditions.

Images