Flow channel plate, cold plate device having the same, battery pack, and electric device

Abstract

The utility model discloses a flow channel plate, cold plate device, battery pack and electrical equipment with it, the flow channel plate includes: first board body, second board body, the second board body and first board body laminated connection, the surface of second board body towards first board body has the flow channel groove recessed to the direction away from first board body, the inner wall of flow channel groove and first board body jointly define cooling flow channel, and second board body is transparent piece. According to the flow channel plate of utility model embodiment, by making second board body be transparent piece, make cooling flow channel visible, so that the state of refrigerant in cooling flow channel is visible, help to clear boiling heat transfer mechanism, improve simulation accuracy.

Description

Technical Field

[0001] This utility model relates to the research field of internal cold plates in battery packs, specifically to a flow channel plate, a cold plate device having the same, a battery pack, and electrical equipment. Background Technology

[0002] In related technologies, both the substrate and the flow channel plate of the cold plate are aluminum plates, making it impossible to observe the flow and heat transfer process of the refrigerant within the cold plate and to monitor the flow of the refrigerant within the flow channel in real time. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a flow channel plate, which makes the cooling flow channel visible by making at least a portion of the second plate transparent, thereby making the state of the refrigerant in the cooling flow channel visible, which helps to clarify the boiling heat transfer mechanism and improve simulation accuracy.

[0004] According to a first aspect of the present invention, a flow channel plate includes: a first plate body; a second plate body, the second plate body and the first plate body being stacked and connected, the surface of the second plate body facing the first plate body having a flow channel groove recessed in a direction away from the first plate body, the inner wall of the flow channel groove and the first plate body jointly defining a cooling flow channel, and the second plate body being a transparent component.

[0005] According to the embodiment of the present invention, by making the second plate a transparent part, the cooling channel is made visible, so that the state of the refrigerant in the cooling channel is visible, which helps to clarify the boiling heat transfer mechanism and improve the simulation accuracy.

[0006] In addition, the flow channel plate according to the above embodiments of the present invention may also have the following additional technical features:

[0007] According to some embodiments of the present invention, the surface of the first plate facing the second plate is a plane.

[0008] According to some embodiments of the present invention, the first plate and the second plate are sealed together.

[0009] According to some optional embodiments of the present invention, an adhesive layer is provided between the first plate and the second plate, and the adhesive layer is adapted to seal and connect the first plate and the second plate.

[0010] According to some specific embodiments of the present invention, at least one of the second plate and the first plate is provided with an adhesive-containing groove, wherein the adhesive-containing groove is closed-loop and surrounds the flow channel groove.

[0011] According to some specific embodiments of the present invention, the second plate body is provided with the adhesive-containing groove recessed in a direction away from the first plate body on the side facing the first plate body.

[0012] According to some specific embodiments of the present invention, the width of the adhesive groove is 1mm-2.5mm; and / or, the depth of the adhesive groove is 1mm-2.5mm.

[0013] According to some specific embodiments of the present invention, a sealing element is provided between the first plate and the second plate, surrounding the cooling channel.

[0014] In some embodiments, the seal is disposed within the adhesive recess.

[0015] According to some optional embodiments of the present invention, the flow channel plate further includes a docking portion having an inlet and an outlet, the docking portion being fixed to the first plate body, the first plate body having an avoidance hole, and the docking portion communicating with the cooling flow channel through the avoidance hole.

[0016] According to some embodiments of the present invention, one of the first plate and the second plate is provided with a mating protrusion, and the other of the first plate and the second plate is provided with a mating through groove that engages with the mating protrusion.

[0017] According to some optional embodiments of the present invention, the mating protrusion has a fastening hole, and the fastener cooperates with the fastening hole to fix the first plate and the second plate.

[0018] According to some specific embodiments of the present invention, the flow channel plate further includes a fixing plate, which is located on the side of the second plate body facing away from the first plate body. The fixing plate is provided with a mating hole, and the fastener is mated with the fastening hole through the mating hole.

[0019] In some embodiments, the fixing plate has a hollowed-out area, which is at least directly opposite the cooling channel.

[0020] According to some specific embodiments of the present invention, the mating groove penetrates the second plate along the thickness direction of the second plate, and the thickness of the second plate is H1, where H1≥23.5mm.

[0021] In some embodiments, the depth of the flow channel groove in the thickness direction of the second plate is H2, where H1 ≥ 8H2.

[0022] A cold plate device is provided according to a second aspect of the present invention, the cold plate device comprising: a flow channel plate as described in the first aspect of the present invention; and a heating element disposed on the flow channel plate to heat the flow channel plate.

[0023] The cold plate device according to the embodiment of the present invention utilizes the flow channel plate described in the first aspect of the present invention, making the second plate body transparent, so that the cooling flow channel is visible, and the state of the refrigerant in the cooling flow channel is visible, which helps to clarify the boiling heat transfer mechanism and improve the simulation accuracy.

[0024] According to some embodiments of the present invention, the heating element is disposed on the side of the first plate facing away from the second plate.

[0025] According to some optional embodiments of the present invention, the surface of the first plate facing the heating element is a plane.

[0026] A battery pack is provided according to a third aspect of the present invention, the battery pack including the flow channel plate described in the first aspect of the present invention.

[0027] According to the battery pack of the present invention, by utilizing the flow channel plate described in the first aspect of the present invention, the second plate is made transparent, making the cooling flow channel visible, thereby making the state of the refrigerant in the cooling flow channel visible, which helps to clarify the boiling heat transfer mechanism and improve the simulation accuracy.

[0028] According to a fourth aspect of the present invention, an electrical device is provided, the electrical device comprising a battery pack as described in an embodiment of a third aspect of the present invention.

[0029] According to the embodiments of the present invention, the electrical equipment utilizes the battery pack described in the third aspect of the present invention, making the second plate transparent so that the cooling channel is visible, thereby making the state of the refrigerant in the cooling channel visible, which helps to clarify the boiling heat transfer mechanism and improve simulation accuracy.

[0030] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0032] Figure 1 This is a schematic diagram of the flow channel plate according to an embodiment of the present utility model;

[0033] Figure 2 This is a schematic diagram of the structure of the second plate according to an embodiment of the present utility model;

[0034] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0035] Figure 4 This is a structural schematic diagram of the first plate and the mating part in one direction according to an embodiment of the present utility model;

[0036] Figure 5 This is a structural schematic diagram of the first plate and the mating part according to an embodiment of the present utility model in another direction;

[0037] Figure 6 yes Figure 5 Enlarged view of point B in the middle;

[0038] Figure 7 This is a structural schematic diagram of the fixing plate according to an embodiment of the present utility model.

[0039] Attached label: 10, flow channel plate;

[0040] 11. First plate; 111. Clearance hole; 112. Mating protrusion; 1121. Fastening hole;

[0041] 12. Second plate; 121. Flow channel groove; 122. Adhesive-containing groove; 123. Fitting through groove;

[0042] 20. Connecting part; 21. Liquid inlet; 22. Liquid outlet;

[0043] 30. Fixing plate; 31. Mating hole; 32. Cutout area. Detailed Implementation

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0045] The flow channel plate 10 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0046] like Figures 1-3 As shown, the flow channel plate 10 according to an embodiment of the present utility model includes a first plate body 11 and a second plate body 12.

[0047] The second plate 12 and the first plate 11 are stacked and connected. The surface of the second plate 12 facing the first plate 11 has a flow channel groove 121 that is recessed in the direction away from the first plate 11. The inner wall of the flow channel groove 121 and the first plate 11 together define a cooling flow channel. The second plate 12 is a transparent part.

[0048] The second plate 12 is made transparent to make the cooling channel visible. When the refrigerant flows in the cooling channel, a high-speed camera can be used to capture the flow state and flow pattern changes of the refrigerant in the cooling channel, which helps to clarify the boiling heat transfer mechanism and improve the simulation accuracy of the refrigerant in the cooling channel.

[0049] Specifically, the flow channel groove 121 can be directly observed through the second plate 12, thereby facilitating a clear observation of the flow state of the refrigerant within the flow channel groove 121, such as the size of the bubbles in the refrigerant. By observing and analyzing the flow state and flow pattern transformation of the refrigerant, the boiling heat transfer mechanism can be clarified, and the simulation accuracy can be improved.

[0050] In addition, it is difficult to form cooling channels directly on the flow channel plate 10. Therefore, a flow channel groove 121 is first formed on the second plate 12, and the first plate 11 closes the opening of the flow channel groove 121 to form a cooling channel, which makes it easier to reduce the processing difficulty.

[0051] Therefore, according to the embodiment of the present invention, the flow channel plate 10 is made transparent by the second plate 12, so that the cooling flow channel is visible and the state of the refrigerant in the cooling flow channel is visible, which helps to clarify the boiling heat transfer mechanism and improve the simulation accuracy.

[0052] The flow channel plate according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

[0053] In some specific embodiments of this utility model, such as Figures 1-3 As shown, the flow channel plate 10 includes a first plate body 11 and a second plate body 12.

[0054] In some embodiments, the second plate 12 is made of quartz glass and acrylic sheet, so that the refrigerant in the cooling channel can be clearly observed while the second plate 12 can withstand the impact force on the second plate 12 when the refrigerant flows in the cooling channel.

[0055] It should be explained here that when it is necessary to study the flow state and flow pattern transformation of the refrigerant, the second plate 12 is made of transparent quartz glass and acrylic plate, so as to facilitate the observation of the flow state and flow pattern transformation of the refrigerant in the cooling channel through the second plate 12.

[0056] In some embodiments, by polishing the inner wall of the flow channel groove 121 and the surface of the first plate 11 facing the second plate 12, the inner wall of the cooling flow channel can have better smoothness, thereby reducing the resistance force encountered by the refrigerant when it flows in the cooling flow channel, and thus ensuring the smooth flow of the refrigerant in the cooling flow channel.

[0057] In some embodiments, the width of the flow channel groove 121 is 7 mm and the height of the flow channel groove 121 is 2.5 mm. Specifically, the dimensions of the flow channel groove 121 can be changed according to the cooling requirements of the battery pack or experimental needs, which will not be elaborated here.

[0058] In some embodiments, the flow channel groove 121 is S-shaped so that the shape of the flow channel groove 121 in the experiment is the same as the shape of the cooling flow channel in the cold plate of the battery pack, thereby facilitating the improvement of the accuracy of the experiment.

[0059] Specifically, the shape of the flow channel groove 121 can be designed according to different design levels, such as the cooling structure of the battery module inside the battery pack and the entire battery pack system. Furthermore, the shape of the cooling flow channel in the flow channel plate 10 can be extended to the module level and the pack level.

[0060] In some embodiments, the first plate 11 is an aluminum plate, so that the first plate 11 has good thermal conductivity, thereby enabling the heat generated by the heating element to be uniformly transferred to the refrigerant in the cooling channel through the first plate 11, so that the refrigerant in the cooling channel can uniformly absorb the heat on the first plate 11.

[0061] In some specific embodiments of this utility model, the surface of the first plate 11 facing the second plate 12 is a plane, so that the first plate 11 can close the opening of the flow channel groove 121 on the second plate 12, thereby forming a sealed cooling flow channel. At the same time, it is convenient for the first plate 11 to evenly transfer the heat generated by the heating element to the coolant in the cooling flow channel.

[0062] The surface of the first plate 11 facing the second plate 12 is flat, so that the inner wall of the cooling channel has a better smoothness, thereby reducing the resistance force encountered by the refrigerant when it flows in the cooling channel, and thus ensuring the smooth flow of the refrigerant in the cooling channel.

[0063] In some embodiments, the surface of the first plate 11 facing away from the second plate 12 is a plane.

[0064] Specifically, when the flow channel plate 10 is used as a cold plate in the battery pack, the first plate 11 is used as a heat spreader in the cold plate. In the actual use of the battery pack, since battery cells need to be arranged on one side of the heat spreader, one side of the heat spreader needs to be flat. Therefore, in this embodiment, the surface of the first plate 11 facing away from the second plate 12 is flat so that the design of the first plate 11 is the same as that of the heat spreader.

[0065] In some embodiments of this utility model, the first plate 11 and the second plate 12 are sealed together to seal the cooling channel and prevent the refrigerant in the cooling channel from overflowing.

[0066] In some optional embodiments of this utility model, an adhesive layer (not shown in the figure) is provided between the first plate 11 and the second plate 12. The adhesive layer is suitable for sealing the connection between the first plate 11 and the second plate 12, so as to glue the first plate 11 and the second plate 12 together and at the same time achieve the sealing of the cooling channel.

[0067] In some specific embodiments of this utility model, such as Figure 2 , Figure 3 As shown, at least one of the second plate 12 and the first plate 11 is provided with an adhesive-containing groove 122, which is a closed ring and surrounds the flow channel groove 121.

[0068] Specifically, the adhesive layer is initially a flowable adhesive, and the adhesive-containing groove 122 is used to contain the adhesive. The adhesive-containing groove 122 is a closed ring and is arranged around the flow channel groove 121 so as to use the adhesive to seal the first plate 11 and the second plate 12, thereby achieving the sealing of the cooling flow channel and preventing the refrigerant in the cooling flow channel from leaking.

[0069] It needs to be explained here that the refrigerant in the cooling channel can undergo a phase change. For example, the refrigerant can be a gas-liquid mixture, so that the adhesive groove 122 is a closed ring and is arranged around the channel groove 121 to ensure that the gap between the first plate 11 and the second plate 12 on the outer edge of the channel groove 121 is fully sealed, and the refrigerant in the cooling channel will not leak.

[0070] Furthermore, when an adhesive layer is provided between the first plate 11 and the second plate 12, there is a risk that the adhesive may flow into the flow channel groove 121. Therefore, the adhesive-containing groove 122 is provided around the flow channel groove 121. In this way, when the first plate 11 and the second plate 12 compress the adhesive, the adhesive flowing towards the flow channel groove 121 will enter the adhesive-containing groove 122, so as to avoid the adhesive entering the flow channel groove 121 and affecting the flow of refrigerant in the flow channel groove 121.

[0071] In some embodiments, the adhesive consists of a resin base and a hardener. When used, the resin base and the hardener are mixed in proportion and then applied to the side of the first plate 11 and the second plate 12 facing each other. After the resin base and the hardener are cured, an adhesive layer is formed, which glues and seals the first plate 11 and the second plate 12 together, while ensuring the sealing of the cooling channel and preventing refrigerant leakage in the cooling channel.

[0072] In some specific embodiments of this utility model, such as Figure 2 , Figure 3 As shown, the second plate 12 has a recessed adhesive groove 122 on the side facing the first plate 11, which is recessed away from the first plate 11. Both the adhesive groove 122 and the flow channel groove 121 are set on the second plate 12. In this way, during processing, the adhesive groove 122 can be directly made to surround the flow channel groove 121. When the first plate 11 and the second plate 12 are bonded together, there is no need to adjust the relative position of the flow channel groove 121 and the adhesive groove 122, which makes it easier to reduce the assembly difficulty.

[0073] In addition, the adhesive groove 122 and the flow channel groove 121 are both set on the second plate 12 to ensure the overall flatness of the first plate 11, so that when the first plate 11 is used as a heat spreader, the first plate 11 can evenly transfer heat to the refrigerant in the cooling flow channel.

[0074] In some specific embodiments of this utility model, the width of the adhesive-containing groove 122 is 1mm-2.5mm, so that the adhesive-containing groove 122 has sufficient space to accommodate the adhesive flowing to the flow channel groove 121, so as to achieve a full seal of the cooling flow channel by using the adhesive in the adhesive-containing groove 122, and at the same time, it can also prevent the adhesive from entering the flow channel groove 121 and affecting the flow of refrigerant in the flow channel groove 121.

[0075] In some embodiments, the width of the adhesive groove 122 may be 1 mm, 1.5 mm, 2 mm or 2.5 mm.

[0076] In some specific embodiments of this utility model, the depth of the adhesive-containing groove 122 is 1mm-2.5mm, so that the adhesive-containing groove 122 has sufficient space to accommodate the adhesive flowing to the flow channel groove 121, so as to achieve a full seal of the cooling flow channel by using the adhesive in the adhesive-containing groove 122, while also preventing the adhesive from entering the flow channel groove 121 and affecting the flow of refrigerant in the flow channel groove 121.

[0077] In some embodiments, the depth of the adhesive groove 122 may be 1 mm, 1.5 mm, 2 mm or 2.5 mm.

[0078] In some specific embodiments of this utility model, a sealing element is provided between the first plate 11 and the second plate 12, which surrounds the cooling channel, to seal the gap between the first plate 11 and the second plate 12, thereby ensuring the sealing performance of the cooling channel.

[0079] In some embodiments, the hardness of the seal is 40 Shore or 70 Shore, so that the seal can fully seal the gap between the first plate 11 and the second plate 12, thereby achieving a full seal on the flow channel groove 121.

[0080] In some embodiments, the seal is disposed in the adhesive groove 122 to limit the position of the seal, thereby preventing the seal from moving when the first plate 11 and the second plate 12 are fixedly connected together, thus ensuring the sealing performance of the seal on the gap between the first plate 11 and the second plate 12, thereby achieving a full seal on the flow channel groove 121 and preventing refrigerant leakage in the flow channel groove 121.

[0081] In some optional embodiments of this utility model, such as Figure 1 , Figure 5 and Figure 6 As shown, the flow channel plate 10 also includes a docking part 20, which is provided with an inlet 21 and an outlet 22. The docking part 20 is fixed to the first plate body 11, and the first plate body 11 is provided with a clearance hole 111. The docking part 20 communicates with the cooling flow channel through the clearance hole 111 to realize the flow of refrigerant in the cooling flow channel, so that the refrigerant can carry away the heat on the first plate body 11 when it flows in the cooling flow channel.

[0082] Specifically, the refrigerant enters the cooling channel through the liquid inlet 21 and the clearance hole 111, flows along the cooling channel, and then flows out through the clearance hole 111 and the liquid outlet 22 to carry away the heat on the first plate 11.

[0083] In some embodiments, such as Figure 6 As shown, the first plate 11 is provided with two clearance holes 111. The two clearance holes 111 are spaced apart and are directly opposite to and connected to the flow channel groove 121. The liquid inlet 21 is connected to the cooling flow channel through one of the clearance holes 111, and the liquid outlet 22 is connected to the cooling flow channel through the other clearance hole 111, so that the liquid entering the cooling flow channel from the liquid inlet 21 flows along the cooling flow channel and flows out from the liquid outlet 22, so as to remove the heat on the first plate 11.

[0084] In some embodiments, the first plate 11 is fixed to the mating portion 20 by brazing to improve the seal between the mating portion 20 and the inner wall of the clearance hole 111, thereby preventing refrigerant leakage.

[0085] In some embodiments of this utility model, one of the first plate 11 and the second plate 12 is provided with a mating protrusion 112, and the other of the first plate 11 and the second plate 12 is provided with a mating through groove 123. The mating through groove 123 is inserted into the mating protrusion 112. In this way, before the first plate 11 and the second plate 12 are fixedly connected, the positions of the first plate 11 and the second plate 12 can be positioned by the insertion of the mating protrusion 112 and the mating through groove 123.

[0086] In some embodiments, the second plate 12 is provided with a plurality of mating grooves 123, which are spaced apart from the flow channel grooves 121. The surface of the first plate 11 facing the second plate 12 is provided with a plurality of mating protrusions 112, which are mated to the mating grooves 123 in a one-to-one correspondence. Before the first plate 11 and the second plate 12 are fixedly connected, the positions of the first plate 11 and the second plate 12 can be positioned by the insertion and engagement of the plurality of mating protrusions 112 and the plurality of mating grooves 123.

[0087] In some examples, the protrusion 112 has a fastening hole 1121, and the fastener cooperates with the fastening hole 1121 to fix the first plate 11 and the second plate 12. The fastener fixes the first plate 11 and the second plate 12 together, which enhances the fixing force between the first plate 11 and the second plate 12. In this way, when refrigerant is introduced into the cooling channel, the fixing force between the first plate 11 and the second plate 12 can be guaranteed to withstand the impact force of the refrigerant on the first plate 11 and the second plate 12, so as to avoid the first plate 11 and the second plate 12 separating due to the impact force when refrigerant is introduced into the cooling channel.

[0088] In some examples, mating protrusions 112 are distributed on the area of ​​the first plate 11 coated with adhesive, and mating grooves 123 are located on the area of ​​the second plate 12 coated with adhesive, so as to fix the first plate 11 and the second plate 12 together using adhesive layers and fasteners, thereby improving the fastening force between the first plate 11 and the second plate 12.

[0089] Furthermore, the flow channel plate 10 also includes a fixing plate 30, which is located on the side of the second plate 12 facing away from the first plate 11. The fixing plate 30 is provided with a mating hole 31. The fasteners engage with the fastening hole 1121 through the mating hole 31, so that the second plate 12 is clamped between the first plate 11 and the fixing plate 30 by utilizing the force between the fasteners and the first plate 11 and the fixing plate 30, thereby enhancing the fastening force between the first plate 11 and the second plate 12.

[0090] A fixing plate 30 is provided on the side of the second plate 12 facing away from the first plate 11. The fixing plate 30 can also be used to protect the second plate 12, which can help improve the pressure resistance of the second plate 12.

[0091] In some examples, the fastening hole 1121 in the mating protrusion 112 has an internal thread, the fastener is a screw, the fastener is threaded into the fastening hole 1121 in the mating protrusion 112, and the mating groove 123 penetrates the second plate 12 in the thickness direction.

[0092] In this design, the mating protrusion 112 on the first plate 11 extends into the mating groove 123, such that the mating groove 123 is positioned opposite to the mating hole 31 on the fixing plate 30. The screw passes through the mating hole 31 on the fixing plate 30 and engages with the fastening hole 1121 in the mating protrusion 112. At the same time, the screw head of the screw abuts against the surface of the fixing plate 30 on the side away from the second plate 12. In this way, the screw can create a force between the first plate 11 and the fixing plate 30, thereby clamping the second plate 12 between the first plate 11 and the fixing plate 30. This provides sufficient fastening force between the first plate 11 and the second plate 12, preventing the impact of the refrigerant on the first plate 11 and the second plate 12 when the refrigerant is introduced into the cooling channel from causing the first plate 11 and the second plate 12 to separate.

[0093] In some embodiments, such as Figure 7 As shown, the fixing plate 30 has a hollow area 32, which is at least directly opposite the cooling channel to facilitate the photographing and observation of the refrigerant in the cooling channel from the hollow area 32.

[0094] Specifically, after the first plate 11, the second plate 12 and the fixing plate 30 are fixedly connected together, the experimenter can take pictures and observe the flow state and flow pattern change of the refrigerant in the cooling channel through the outer periphery of the second plate 12 and the hollow area 32 on the fixing plate 30. This allows for taking pictures and observing the flow state and flow pattern change of the refrigerant from multiple angles, which helps to improve the accuracy of experimental data and the precision of simulation.

[0095] For example, when observing the size of bubbles in the refrigerant, the refrigerant can be photographed and observed from the outer periphery of the second plate 12 and the hollow area 32 on the fixed plate 30 to obtain more accurate experimental data, which can improve the accuracy of the implementation and the simulation precision.

[0096] In summary, the flow and heat transfer of refrigerant within the flow channel plate 10, the boiling heat absorption, and the flow pattern transformation can be clearly observed through a high-speed camera. This facilitates in-depth research on the boiling heat transfer mechanism and helps to propose and improve the design of enhanced heat transfer in local areas of the flow channel plate 10 for different flow patterns.

[0097] In some optional embodiments of this utility model, the mating groove 123 penetrates the second plate 12 along the thickness direction of the second plate 12, and the thickness of the second plate 12 is H1, where H1≥23.5mm. This makes it easier to increase the mating area of ​​the mating protrusion 112 and the mating groove 123 when the mating protrusion 112 on the first plate 11 extends into the mating groove 123 on the second plate 12, thus ensuring the strength of the fixed connection between the first plate 11 and the second plate 12. This also prevents the impact force of the refrigerant on the inner wall of the cooling channel from causing the first plate 11 and the second plate 12 to separate when the refrigerant is introduced into the cooling channel.

[0098] In some embodiments, the thickness of the second plate 12 is H1, and the depth of the flow channel groove 122 in the thickness direction of the second plate 12 is H2, where H1≥8H2, so as to ensure the overall strength of the second plate 12 and avoid the second plate 12 being too weak due to the flow channel groove 122, thereby reducing the possibility of the second plate 12 being damaged.

[0099] In some embodiments, H1 ≥ 23.5 mm.

[0100] In some specific embodiments of this utility model, adhesives and screws are used to fix the first plate 11 and the second plate 12 together so that there is sufficient fastening force between the first plate 11 and the second plate 12 to avoid the impact force of the refrigerant on the cooling channel when the refrigerant enters the cooling channel, which would cause the first plate 11 and the second plate 12 to separate.

[0101] Specifically, experiments have shown that when refrigerant is introduced into the cooling channel, the fastening force of the adhesive layer and fasteners used to fix the first plate 11 and the second plate 12 together is sufficient to withstand the impact force of the refrigerant on the cooling channel.

[0102] The following describes a cold plate apparatus according to an embodiment of the present invention. The cold plate apparatus according to an embodiment of the present invention includes a flow channel plate 10 according to the above embodiment of the present invention and a heating element, the heating element being disposed on the flow channel plate 10 to heat the flow channel plate 10.

[0103] The heating element (not shown in the figure) is used to simulate the heat generated by multiple battery cells in the battery pack during operation. The flow channel plate 10 is used to simulate the cold plate in the battery pack. When the refrigerant flows in the cooling channel, the refrigerant absorbs the heat generated by the heating element, thereby simulating the cold plate absorbing the heat generated by the battery cells. The flow channel plate 10 is used to simulate the cooling process of the battery cells in the battery pack.

[0104] It should be explained here that the cold plate device in this utility model is suitable for research use, used to study the flow state and flow pattern transformation of refrigerant, and further to study the boiling heat transfer mechanism of refrigerant, etc., and to study the heat transfer capacity of the flow channel plate 10. By making the cooling flow channel visible, it is convenient for experimental simulation.

[0105] According to the cold plate device of the present invention, by utilizing the flow channel plate 10 of the above embodiment of the present invention, the second plate 12 is made transparent, making the cooling flow channel visible, so that the state of the refrigerant in the cooling flow channel is visible, which helps to clarify the boiling heat transfer mechanism and improve the simulation accuracy.

[0106] In some optional embodiments of this utility model, the heating element is disposed on the side of the first plate 11 facing away from the second plate 12, so that the heating element transfers heat to the refrigerant in the cooling channel through the first plate 11. At this time, the user can take pictures of the flow state and flow pattern change of the refrigerant in the cooling channel through the outer periphery of the second plate 12 or the side of the second plate 12 facing away from the first plate 11, so as to clarify the boiling heat transfer mechanism and improve the simulation accuracy.

[0107] In some specific embodiments of this utility model, the surface of the first plate 11 facing the heating element is a plane, so as to facilitate the heating element to uniformly transfer heat to the first plate 11, and then uniformly transfer heat to the refrigerant in the cooling channel.

[0108] Specifically, the flow channel plate 10 corresponds to the structure of the cold plate in the battery pack. The first plate 11 serves as the heat spreader in the cold plate. In the actual use of the battery pack, since battery cells need to be arranged on one side of the heat spreader, one side of the heat spreader needs to be flat. Therefore, in this embodiment, the surface of the first plate 11 facing away from the second plate 12 is flat so that the design of the first plate 11 is the same as that of the heat spreader, thereby facilitating the improvement of experimental accuracy.

[0109] The following describes a battery pack according to an embodiment of the present invention. The battery pack according to an embodiment of the present invention includes a flow channel plate 10 according to the above embodiment of the present invention.

[0110] According to the battery pack of the present invention, by utilizing the flow channel plate 10 of the above embodiment of the present invention, the second plate 12 is made transparent, making the cooling flow channel visible, so that the state of the refrigerant in the cooling flow channel is visible, which helps to clarify the boiling heat transfer mechanism and improve the simulation accuracy.

[0111] Other configurations and operations of the battery pack according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0112] The following describes an electrical device according to an embodiment of the present invention. The electrical device according to an embodiment of the present invention includes a battery pack according to the above-described embodiment of the present invention.

[0113] The electrical equipment mentioned here can include, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc.

[0114] Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; spacecraft can include airplanes, rockets, space shuttles, and spacecraft; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0115] In some embodiments, the electrical equipment is a vehicle, which may be a pure electric vehicle or a hybrid vehicle.

[0116] According to the embodiments of the present invention, the electrical equipment utilizes the battery pack according to the above embodiments of the present invention to make the second plate 12 transparent, so that the cooling channel is visible, and the state of the refrigerant in the cooling channel is visible, which helps to clarify the boiling heat transfer mechanism and improve the simulation accuracy.

[0117] Other components and operations of the electrical equipment according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0118] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them.

[0119] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0120] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0121] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0122] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A flow channel plate (10), characterized in that, include: First plate (11); The second plate (12) is stacked and connected with the first plate (11). The surface of the second plate (12) facing the first plate (11) has a flow channel groove (121) that is recessed in the direction away from the first plate (11). The inner wall of the flow channel groove (121) and the first plate (11) together define a cooling flow channel. The second plate (12) is a transparent part.

2. The flow channel plate (10) according to claim 1, characterized in that, The surface of the first plate (11) facing the second plate (12) is a plane.

3. The flow channel plate (10) according to claim 1, characterized in that, The first plate (11) and the second plate (12) are sealed together.

4. The flow channel plate (10) according to claim 3, characterized in that, An adhesive layer is provided between the first plate (11) and the second plate (12), and the adhesive layer is suitable for sealingly connecting the first plate (11) and the second plate (12).

5. The flow channel plate (10) according to claim 4, characterized in that, At least one of the second plate (12) and the first plate (11) is provided with an adhesive-containing groove (122), which is closed-loop and surrounds the flow channel groove (121).

6. The flow channel plate (10) according to claim 5, characterized in that, The second plate (12) has a recessed adhesive groove (122) on the side facing the first plate (11) that is recessed away from the first plate (11).

7. The flow channel plate (10) according to claim 5, characterized in that, The width of the adhesive-containing groove (122) is 1mm-2.5mm; and / or, the depth of the adhesive-containing groove (122) is 1mm-2.5mm.

8. The flow channel plate (10) according to claim 5, characterized in that, A sealing element is provided between the first plate (11) and the second plate (12) surrounding the cooling channel.

9. The flow channel plate (10) according to claim 8, characterized in that, The seal is located within the adhesive groove (122).

10. The flow channel plate (10) according to claim 2, characterized in that, It also includes a docking part (20) with an inlet (21) and an outlet (22), the docking part (20) being fixed to the first plate (11), the first plate (11) having a clearance hole (111), and the docking part (20) communicating with the cooling channel through the clearance hole (111).

11. The flow channel plate (10) according to any one of claims 1-10, characterized in that, One of the first plate (11) and the second plate (12) is provided with a mating protrusion (112), and the other of the first plate (11) and the second plate (12) is provided with a mating through groove (123) that is inserted into the mating protrusion (112).

12. The flow channel plate (10) according to claim 11, characterized in that, The mating protrusion (112) has a fastening hole (1121), and the fastener cooperates with the fastening hole (1121) to fix the first plate (11) and the second plate (12).

13. The flow channel plate (10) according to claim 12, characterized in that, It also includes a fixing plate (30), which is located on the side of the second plate (12) facing away from the first plate (11). The fixing plate (30) is provided with a mating hole (31), and the fastener is mated with the fastening hole (1121) through the mating hole (31).

14. The flow channel plate (10) according to claim 13, characterized in that, The fixing plate (30) has a hollow area (32), which is at least directly opposite the cooling channel.

15. The flow channel plate (10) according to claim 11, characterized in that, The mating groove (123) penetrates the second plate (12) along the thickness direction of the second plate (12), and the thickness of the second plate (12) is H1, where H1 ≥ 23.5 mm.

16. The flow channel plate (10) according to any one of claims 1-10, characterized in that, The thickness of the second plate (12) is H1, and the depth of the flow channel groove (122) in the thickness direction of the second plate (12) is H2, where H1≥8H2.

17. A cold plate assembly, characterized in that, include: Flow channel plate (10), wherein the flow channel plate (10) is any one of claims 1-16; A heating element is disposed on the flow channel plate (10) to heat the flow channel plate (10).

18. The cold plate apparatus according to claim 17, characterized in that, The heating element is located on the side of the first plate (11) facing away from the second plate (12).

19. The cold plate apparatus according to claim 18, characterized in that, The surface of the first plate (11) facing the heating element is a plane.

20. A battery pack, characterized in that, Includes the flow channel plate (10) according to any one of claims 1-16.

21. An electrical appliance, characterized in that, Includes the battery pack as described in claim 20.

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