Micro-channel heat exchange system, control method and controller thereof, and power battery

Abstract

The application discloses a micro-channel heat exchange system and a control method and controller thereof and a power battery, relates to the technical field of micro-channel heat exchange, and the micro-channel heat exchange system comprises a heat exchanger body, an inlet flow guide groove, an outlet flow collecting cavity, an ultrasonic vibrator unit, a micro-channel unit, a temperature measuring unit and a controller; the inlet flow guide groove is arranged in the heat exchanger body; the outlet flow collecting cavity is arranged in the heat exchanger body; the ultrasonic vibrator unit is arranged in the inlet flow guide groove and the outlet flow collecting cavity; the micro-channel unit is arranged between the inlet flow guide groove and the outlet flow collecting cavity, the micro-channel unit comprises a plurality of parallelly arranged first micro-channels, and a Tesla valve flow guiding section for one-way flow guiding is arranged on the first micro-channel; the temperature measuring unit is used for collecting temperature values of preset temperature measuring points on the micro-channel unit; and the controller is electrically connected with the ultrasonic vibrator unit and the temperature measuring unit respectively. The application can greatly improve the critical heat flux density of the heat exchanger.

Description

Technical Field

[0001] This application relates to the field of microchannel heat exchange technology, and in particular to a microchannel heat exchange system and its control method, controller and power battery. Background Technology

[0002] Microchannel heat exchangers have become core heat exchange components in high-density heat flux scenarios due to their advantages such as small size, high heat transfer coefficient, and fast response speed. However, conventional microchannel heat exchangers are prone to phenomena such as backflow of the working fluid and bubble aggregation under high heat flux density conditions, which leads to a sharp rise in the temperature of the heat exchange wall and eventually triggers the critical heat flux density (CHF), limiting their application in high heat flux density scenarios (such as chip heat dissipation and fast charging heat dissipation of power batteries). Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a microchannel heat exchange system and its control method, controller, and power battery, which can significantly improve the critical heat flux density of the heat exchanger.

[0004] In a first aspect, embodiments of this application provide a microchannel heat exchange system, including:

[0005] Heat exchanger body;

[0006] An inlet guide channel is provided inside the heat exchanger body;

[0007] The outlet manifold is located within the heat exchanger body.

[0008] An ultrasonic transducer unit is disposed within the inlet guide groove and the outlet collecting cavity;

[0009] A microchannel unit is disposed between the inlet guide channel and the outlet collection cavity. The microchannel unit includes multiple parallel first microchannels, and each first microchannel is provided with a Tesla valve guide section for unidirectional flow guidance.

[0010] A temperature measuring unit is used to collect temperature values ​​at preset temperature measuring points on the microchannel unit.

[0011] The controller is electrically connected to both the ultrasonic transducer unit and the temperature measuring unit.

[0012] According to some embodiments of this application, the microchannel unit further includes: multiple parallel second microchannels, wherein the second microchannels are conventional straight channels.

[0013] According to some embodiments of this application, the first microchannel further includes: a first DC section and a second DC section, one end of the first DC section being connected to the inlet guide groove, and the other end of the first DC section being connected to the Tesla valve guide section; one end of the second DC section being connected to the outlet collector cavity, and the other end of the second DC section being connected to the Tesla valve guide section.

[0014] According to some embodiments of this application, the Tesla valve guide section includes: a main channel and a plurality of Tesla valve structures, wherein the Tesla valve structures are disposed on the main channel and are connected to the main channel.

[0015] According to some embodiments of this application, the Tesla valve structure includes: a first branch flow channel and a second branch flow channel connected in sequence, wherein the angle formed between the first branch flow channel and the main flow channel is greater than the angle formed between the second branch flow channel and the main flow channel.

[0016] According to some embodiments of this application, the ultrasonic transducer unit includes: a first ultrasonic transducer and a second ultrasonic transducer, wherein the first ultrasonic transducer is disposed in the inlet guide groove and the second ultrasonic transducer is disposed in the outlet collector cavity.

[0017] Secondly, this application provides a control method for a microchannel heat exchange system, which is applied to a controller of a microchannel heat exchange system as described in any one of the embodiments of the first aspect. The microchannel heat exchange system includes: a heat exchanger body, an inlet guide channel, an outlet collection cavity, a microchannel unit, an ultrasonic transducer unit, and a temperature measuring unit.

[0018] The method includes:

[0019] The temperature measurement unit collects temperature values ​​at preset temperature measurement points on the microchannel unit.

[0020] The intensity and frequency of the ultrasonic waves emitted by the ultrasonic transducer unit to the microchannel unit are controlled according to the temperature change of the temperature value.

[0021] According to some embodiments of this application, controlling the sound intensity and frequency of the ultrasonic waves emitted by the ultrasonic transducer unit to the microchannel unit based on the temperature change of the temperature value includes:

[0022] When the temperature change indicates that the temperature value has risen abnormally, the temperature range in which the temperature value falls is determined;

[0023] The target sound intensity and target frequency are determined based on the temperature range.

[0024] The ultrasonic transducer unit is controlled to emit ultrasonic waves to the microchannel unit according to the target sound intensity and the target frequency.

[0025] Thirdly, embodiments of this application provide a controller, including at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to perform a control method for a microchannel heat exchange system as described in any of the second aspect embodiments.

[0026] Fourthly, embodiments of this application provide a power battery, including the microchannel heat exchange system as described in any one of the embodiments of the first aspect.

[0027] This application embodiment includes: a microchannel heat exchange system comprising: a heat exchanger body, an inlet guide channel, an outlet collection cavity, an ultrasonic transducer unit, a microchannel unit, a temperature measuring unit, and a controller; the inlet guide channel is disposed within the heat exchanger body; the outlet collection cavity is disposed within the heat exchanger body; the ultrasonic transducer unit is disposed within the inlet guide channel and the outlet collection cavity; the microchannel unit is disposed between the inlet guide channel and the outlet collection cavity, the microchannel unit comprising multiple parallel first microchannels, each first microchannel having a Tesla valve guide section for unidirectional flow guidance; the temperature measuring unit is used to collect temperature values ​​at preset temperature measuring points on the microchannel unit; the controller is electrically connected to the ultrasonic transducer unit and the temperature measuring unit respectively. When the microchannel heat exchange system is working, the working fluid enters the microchannel unit from the inlet guide channel. The working fluid exchanges heat with a high heat flux density heat source outside the heat exchanger body. After absorbing heat, the working fluid partially vaporizes to form a gas-liquid two-phase flow. A Tesla valve guide section is set on the first microchannel. The forward flow resistance of the Tesla valve guide section is small, allowing the gas-liquid two-phase flow to flow smoothly to the outlet collection chamber. If a sudden increase in local heat flux density or pressure fluctuation causes bubbles to accumulate and push the working fluid to flow in the opposite direction, the reverse flow resistance of the Tesla valve guide section is large, which weakens the reverse flow velocity and prevents the reverse flow. This reduces the probability of bubble accumulation leading to vapor blockage and ensures that there is always a supply of fresh working fluid in the conventional heat exchange section. By using the first microchannel with a Tesla valve guide section for unidirectional flow to suppress the reverse flow of the working fluid, the accumulation of bubbles in the conventional heat exchange section of the first microchannel to form vapor blockage is avoided, ensuring that there is always a supply of fresh working fluid in the conventional heat exchange section, thereby significantly increasing the critical heat flux density of the heat exchanger. In other words, the embodiments of this application can significantly increase the critical heat flux density of the heat exchanger.

[0028] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description and the accompanying drawings. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a microchannel heat exchange system provided in one embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the specific structure of an ultrasonic transducer unit provided in one embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the structure of a second microchannel provided in one embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the structure of a first microchannel provided in one embodiment of this application;

[0033] Figure 5 This is a flowchart illustrating the steps of a control method for a microchannel heat exchange system provided in one embodiment of this application.

[0034] Figure 6 This is a schematic diagram of the hardware structure of a controller provided in one embodiment of this application;

[0035] Figure Description: The microchannel heat exchange system 1000 includes: a heat exchanger body 100, an inlet guide channel 200, an outlet collection cavity 300, an ultrasonic transducer unit 400, a microchannel unit 500, a temperature measuring unit 600, and a controller 700; a first ultrasonic transducer 410, a second ultrasonic transducer 420, a second microchannel 520, a first microchannel 510, a first direct current section 511, a second direct current section 512, a Tesla valve guide section 513, a main current channel 5131, a Tesla valve structure 5132, a first branch channel A, and a second branch channel B. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0037] It should be understood that in the description of this application, the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0038] It should be noted that although a logical order is shown in the flowcharts in this application, in some cases, the steps shown or described may be performed in a different order than that shown in the flowcharts. In the description of this application, "several" means one or more, and "more" means two or more. The terms "first" and "second" are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order in which the technical features are indicated.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0040] This application discloses a microchannel heat exchange system, a control method for the microchannel heat exchange system, a controller, and a power battery, relating to the field of microchannel heat exchange technology. The microchannel heat exchange system includes: a heat exchanger body, an inlet guide channel, an outlet collector cavity, an ultrasonic transducer unit, a microchannel unit, a temperature measuring unit, and a controller. The inlet guide channel is disposed within the heat exchanger body. The outlet collector cavity is disposed within the heat exchanger body. The ultrasonic transducer unit is disposed within the inlet guide channel and the outlet collector cavity. The microchannel unit is disposed between the inlet guide channel and the outlet collector cavity, and the microchannel unit includes multiple parallel first microchannels, each with a Tesla valve guide section for unidirectional flow guidance. The temperature measuring unit is used to collect temperature values ​​at preset temperature measuring points on the microchannel unit. The controller is electrically connected to both the ultrasonic transducer unit and the temperature measuring unit. This application can significantly increase the critical heat flux density of the heat exchanger.

[0041] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0042] Firstly, such as Figure 1 As shown, Figure 1This is a schematic diagram of a microchannel heat exchange system provided in one embodiment of this application. A microchannel heat exchange system 1000 includes: a heat exchanger body 100, an inlet guide channel 200, an outlet collection cavity 300, an ultrasonic transducer unit 400, a microchannel unit 500, a temperature measuring unit 600, and a controller 700; wherein, the inlet guide channel 200 is disposed within the heat exchanger body 100; the outlet collection cavity 300 is disposed within the heat exchanger body 100; the ultrasonic transducer unit 400 is disposed within the inlet guide channel 200 and the outlet collection cavity 300; the microchannel unit 500 is disposed between the inlet guide channel 200 and the outlet collection cavity 300, and the microchannel unit 500 includes multiple parallel first microchannels, each first microchannel having a Tesla valve guide section for unidirectional flow guidance; the temperature measuring unit 600 is used to collect temperature values ​​at preset temperature measuring points on the microchannel unit 500; the controller 700 is electrically connected to the ultrasonic transducer unit 400 and the temperature measuring unit 600 respectively.

[0043] It should be noted that in the microchannel heat exchange system 1000, the normal flow direction of the working fluid is to enter the inlet guide channel 200, then flow through the microchannel unit 500 to the outlet collection chamber 300.

[0044] Specifically, the working fluid is a coolant or refrigerant; this application does not limit the specific type of working fluid.

[0045] It should be noted that the preset temperature measurement points are set on the side of the channels of the microchannel unit 500. Specifically, as shown... Figure 1 As shown, the preset temperature measurement points on the microchannel heat exchange system 1000 include: temperature measurement point 1, temperature measurement point 2, temperature measurement point 3, temperature measurement point 4, temperature measurement point 5, and temperature measurement point 6. This application sets six temperature measurement points, but the actual number of temperature measurement points can be adjusted according to actual needs. This application does not impose a specific limit on the number of temperature measurement points.

[0046] In the microchannel heat exchange system 1000 provided in this application embodiment, when the microchannel heat exchange system 1000 is working, the working fluid enters the microchannel unit 500 from the inlet guide channel 200. The working fluid exchanges heat with a high heat flux density heat source outside the heat exchanger body 100. After absorbing heat, the working fluid partially vaporizes to form a gas-liquid two-phase flow. A Tesla valve guide section is provided on the first microchannel. The forward flow resistance of the Tesla valve guide section is small, which allows the gas-liquid two-phase flow to flow smoothly to the outlet collection chamber 300. If a sudden increase in local heat flux density or pressure fluctuation causes bubbles to accumulate and push the working fluid... When a reverse flow trend occurs, the reverse flow velocity of the working fluid weakens due to the large reverse flow resistance of the Tesla valve guide section, thus preventing reverse flow. This reduces the probability of bubble accumulation leading to vapor blockage, ensuring a constant supply of fresh working fluid in the conventional heat exchange section. By utilizing the first microchannel with a Tesla valve guide section for unidirectional flow to suppress reverse flow of the working fluid, bubble accumulation and vapor blockage in the conventional heat exchange section of the first microchannel are avoided, ensuring a constant supply of fresh working fluid in the conventional heat exchange section, thereby significantly increasing the critical heat flux density of the heat exchanger.

[0047] According to some embodiments of this application, such as Figure 2 As shown, Figure 2 This is a schematic diagram of the specific structure of an ultrasonic transducer unit provided in one embodiment of this application. The ultrasonic transducer unit 400 includes: a first ultrasonic transducer 410 and a second ultrasonic transducer 420. The first ultrasonic transducer 410 is disposed in the inlet guide groove 200, and the second ultrasonic transducer 420 is disposed in the outlet collecting cavity 300.

[0048] Specifically, in this embodiment, two first ultrasonic transducers 410 are provided in the inlet guide channel 200, and two second ultrasonic transducers 420 are provided in the outlet collecting cavity 300. It is understood that the number of first ultrasonic transducers 410 and second ultrasonic transducers 420 can be set according to actual needs, and this application does not impose specific limitations on the number of first ultrasonic transducers and second ultrasonic transducers used.

[0049] Specifically, the first and second ultrasonic transducers are used to adjust the intensity and frequency of the ultrasonic waves. If an abnormal increase in the temperature value at the measuring point is detected, adaptive control is applied to the ultrasonic transducer unit to adjust the intensity and frequency of the ultrasonic waves.

[0050] According to some embodiments of this application, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of a second microchannel provided in one embodiment of this application. The microchannel unit 500 further includes multiple parallel second microchannels 520, which are conventional straight channels. By retaining a portion of the conventional straight channels, minimal flow resistance is maintained, allowing the working fluid to maintain a high flow rate in the absence of abnormal temperatures.

[0051] Combination Figure 4 , Figure 4 This is a schematic diagram of the structure of the first microchannel provided in one embodiment of this application, which further illustrates the specific structure of the first microchannel.

[0052] According to some embodiments of this application, the first microchannel 510 further includes: a first DC section 511 and a second DC section 512, one end of the first DC section 511 is connected to the inlet guide groove 200, and the other end of the first DC section 511 is connected to the Tesla valve guide section 513; one end of the second DC section 512 is connected to the outlet collector cavity 300, and the other end of the second DC section 512 is connected to the Tesla valve guide section 513.

[0053] According to some embodiments of this application, the Tesla valve guide section 513 includes: a main channel 5131 and a plurality of Tesla valve structures 5132, wherein the Tesla valve structures 5132 are disposed on the main channel 5131 and are connected to the main channel 5131.

[0054] According to some embodiments of this application, the Tesla valve structure 5132 includes: a first branch flow channel A and a second branch flow channel B connected in sequence, wherein the angle formed between the first branch flow channel A and the main flow channel is greater than the angle formed between the second branch flow channel B and the main flow channel. The second branch flow channel B is located closer to the inlet guide groove 200, and the first branch flow channel A is located farther from the inlet guide groove 200.

[0055] Specifically, the first DC section 511 and the second DC section 512 are conventional heat exchange sections on the first microchannel 510.

[0056] It should be noted that the Tesla valve, as a unidirectional flow-guiding structure without moving parts, relies on the pressure loss difference of the fluid in different flow channel branches to achieve the function of "forward conduction and reverse cut-off," and has advantages such as simple structure, high reliability, and no additional energy consumption. Currently, Tesla valves have been applied in fluid transportation, energy recovery, and other fields, but they have not yet been combined with microchannel heat exchangers. This application embeds the Tesla valve from a macroscopic pipeline valve into a microchannel, solving the problem of backflow of liquid in the channel due to gas expansion under high heat flux density.

[0057] Specifically, when the heat exchanger is working, the working fluid (such as coolant or refrigerant) enters the conventional heat exchange section of the first microchannel of the microchannel unit from the inlet guide channel. In the conventional heat exchange section, it exchanges heat with a high heat flux density heat source (such as a chip or battery) outside the heat exchanger body. After absorbing heat, the working fluid partially vaporizes to form a gas-liquid two-phase flow. The gas-liquid two-phase flow continues to flow towards the Tesla valve guide section. Because the forward flow resistance of the Tesla valve guide section is small, most of the gas-liquid two-phase flow flows smoothly to the outlet collector through the main channel and the second branch channel. If a sudden increase in local heat flux density or pressure fluctuation causes bubbles to accumulate and push the working fluid to reverse flow, the reverse-flowing working fluid will preferentially enter the first branch channel due to the large reverse flow resistance of the second branch channel. The high flow resistance of the first branch channel will significantly weaken the reverse flow velocity or even prevent the reverse flow. By suppressing the reverse flow of the working fluid, the accumulation of bubbles in the conventional heat exchange section to form a vapor block is avoided, ensuring that there is always a supply of fresh working fluid in the conventional heat exchange section, thereby greatly increasing the critical heat flux density of the heat exchanger.

[0058] It is important to emphasize that the microchannel heat exchange system provided in this application provides a microchannel heat exchanger with an integrated Tesla valve structure. By embedding a Tesla valve unit within a conventional microchannel, the unidirectional flow characteristics of the Tesla valve are utilized to suppress backflow of the working fluid and bubble accumulation, thereby significantly improving the critical heat flux density of the heat exchanger. Therefore, this application, by adding a Tesla valve, can overcome the shortcomings of existing microchannel heat exchangers, such as low critical heat flux density and susceptibility to backflow of the working fluid.

[0059] Those skilled in the art will understand that the system structure shown in the figures does not constitute a limitation on the embodiments of this application, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0060] The system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0061] It will be understood by those skilled in the art that the system architecture and application scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. It is known by those skilled in the art that with the evolution of system architecture and the emergence of new application scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0062] Based on the above system structure, various embodiments of the control method for the microchannel heat exchange system of this application are proposed below.

[0063] Secondly, such as Figure 5 As shown, Figure 5 This is a flowchart illustrating the steps of a control method for a microchannel heat exchange system according to an embodiment of this application. This control method for a microchannel heat exchange system can be applied to, for example... Figure 1 The controller for the microchannel heat exchange system shown includes a heat exchanger body, an inlet guide channel, an outlet manifold, a microchannel unit, an ultrasonic transducer unit, and a temperature measurement unit. The control method for this microchannel heat exchange system may include, but is not limited to, steps S100 to S200.

[0064] Step S100: Collect temperature values ​​at preset temperature measurement points on the microchannel unit using the temperature measurement unit;

[0065] Step S200: Control the intensity and frequency of the ultrasonic waves emitted by the ultrasonic transducer unit to the microchannel unit according to the temperature change.

[0066] Through steps S100 to S200, when the microchannel heat exchange system is working, the working fluid enters the microchannel unit from the inlet guide channel. The working fluid exchanges heat with a high heat flux density heat source outside the heat exchanger body. After absorbing heat, the working fluid partially vaporizes to form a gas-liquid two-phase flow. A Tesla valve guide section is provided on the first microchannel. The forward flow resistance of the Tesla valve guide section is small, allowing the gas-liquid two-phase flow to smoothly flow towards the outlet collection chamber. If a sudden increase in local heat flux density or pressure fluctuation causes bubbles to accumulate and push the working fluid to exhibit a reverse flow tendency, the flow is reversed. The high reverse flow resistance of the Tesla valve guide section weakens the reverse flow velocity of the working fluid, preventing it from flowing backward. This reduces the probability of bubble accumulation leading to vapor blockage, ensuring a constant supply of fresh working fluid in the conventional heat exchange section. By utilizing the first microchannel with a Tesla valve guide section for unidirectional flow control to suppress reverse flow, bubble accumulation and vapor blockage in the conventional heat exchange section of the first microchannel are avoided, ensuring a constant supply of fresh working fluid and significantly increasing the critical heat flux density of the heat exchanger. When the working fluid flows through the microchannel unit, the temperature value is collected at a preset temperature measurement point on the microchannel unit by the temperature measurement unit. Based on the temperature change, the intensity and frequency of the ultrasonic waves emitted by the ultrasonic transducer unit to the microchannel unit are controlled. This achieves an ultrasonic adaptive control mechanism. By applying ultrasonic waves of different intensities and frequencies to the microchannel unit, the bubbles that have gathered in the microchannel are broken into smaller bubbles, further enhancing the flow disturbance and strengthening heat transfer. In other words, the embodiments of this application can significantly increase the critical heat flux density of the heat exchanger.

[0067] According to some embodiments of this application, step S200 is further described. Step S200: The sound intensity and frequency of the ultrasonic waves emitted by the ultrasonic transducer unit to the microchannel unit are controlled according to the temperature change of the temperature value, including but not limited to steps S210 to S230.

[0068] Step S210: When the temperature change indicator shows an abnormally high temperature value, determine the temperature range in which the temperature value is located.

[0069] Step S220: Determine the corresponding target sound intensity and target frequency based on the temperature range.

[0070] Step S230: Control the ultrasonic transducer unit to emit ultrasonic waves to the microchannel unit according to the target sound intensity and target frequency.

[0071] Through steps S210 to S230, an ultrasonic adaptive control mechanism can be realized. By applying ultrasonic waves of different intensities and frequencies to the microchannel, the bubbles formed by the convergence of the microchannel are broken into smaller bubbles, further enhancing the flow disturbance in the channel and strengthening heat transfer.

[0072] like Figure 6 As shown, Figure 6 This is a schematic diagram of the hardware structure of a controller provided in one embodiment of this application. The present invention also provides a controller, comprising:

[0073] The processor 601 can be implemented using a general-purpose central processing unit (CPU), microprocessor, application specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application.

[0074] The memory 602 can be implemented as a read-only memory (ROM), static storage device, dynamic storage device, or random access memory (RAM). The memory 602 can store the operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 602 and is called and executed by the processor 601 to execute the control method of the microchannel heat exchange system of the embodiments of this application.

[0075] The input / output interface 603 is used to implement information input and output;

[0076] The communication interface 604 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0077] Bus 605 transmits information between various components of the device (e.g., processor 601, memory 602, input / output interface 603, and communication interface 604);

[0078] The processor 601, memory 602, input / output interface 603, and communication interface 604 are connected to each other within the device via bus 605.

[0079] Fourthly, embodiments of this application also provide a power battery, including the microchannel heat exchange system described above.

[0080] Specifically, the microchannel heat exchange system provided in this application integrates a Tesla valve and an ultrasonically reinforced structure (i.e., an ultrasonic transducer unit), which can significantly improve the critical heat flux density of the microchannel heat exchanger. It is mainly suitable for heat dissipation of power batteries in new energy vehicles (especially in fast charging scenarios), and can also be extended to scenarios with extremely high requirements for heat exchange efficiency and thermal safety, such as heat dissipation of electronic devices and thermal control in aerospace.

[0081] According to some embodiments of this application, the power battery includes: a heat exchanger body, an inlet guide channel, an outlet collector cavity, an ultrasonic transducer unit, a microchannel unit, a temperature measuring unit, and a controller; the inlet guide channel is disposed within the heat exchanger body; the outlet collector cavity is disposed within the heat exchanger body; the ultrasonic transducer unit is disposed within the inlet guide channel and the outlet collector cavity; the microchannel unit is disposed between the inlet guide channel and the outlet collector cavity, and the microchannel unit includes multiple parallel first microchannels, each first microchannel having a Tesla valve guide section for unidirectional flow guidance; the temperature measuring unit is used to collect temperature values ​​from preset temperature measuring points on the microchannel unit; the controller is electrically connected to the ultrasonic transducer unit and the temperature measuring unit respectively. When the microchannel heat exchange system is working, the working fluid enters the microchannel unit from the inlet guide channel. The working fluid exchanges heat with a high heat flux density heat source outside the heat exchanger body. After absorbing heat, the working fluid partially vaporizes to form a gas-liquid two-phase flow. A Tesla valve guide section is set on the first microchannel. The forward flow resistance of the Tesla valve guide section is small, allowing the gas-liquid two-phase flow to flow smoothly to the outlet collection chamber. If a sudden increase in local heat flux density or pressure fluctuation causes bubbles to accumulate and push the working fluid to flow in the opposite direction, the reverse flow resistance of the Tesla valve guide section is large, which weakens the reverse flow velocity and prevents the reverse flow. This reduces the probability of bubble accumulation leading to vapor blockage and ensures that there is always a supply of fresh working fluid in the conventional heat exchange section. By using the first microchannel with a Tesla valve guide section for unidirectional flow to suppress the reverse flow of the working fluid, the accumulation of bubbles in the conventional heat exchange section of the first microchannel to form vapor blockage is avoided, ensuring that there is always a supply of fresh working fluid in the conventional heat exchange section, thereby significantly increasing the critical heat flux density of the heat exchanger. When the working fluid flows through the microchannel unit, the temperature value is collected by the temperature measuring unit at the preset temperature measuring point on the microchannel unit. Based on the temperature change, the intensity and frequency of the ultrasonic waves emitted by the ultrasonic transducer unit to the microchannel unit are controlled. This achieves an ultrasonic adaptive control mechanism. By applying ultrasonic waves of different intensities and frequencies to the microchannel unit, the bubbles that have formed in the microchannel are broken into smaller bubbles, further enhancing the flow disturbance in the channel and strengthening heat transfer. In other words, the embodiments of this application can significantly increase the critical heat flux density of the heat exchanger.

[0082] This application also provides a storage medium, which is a computer-readable storage medium, storing a computer program that, when executed by a processor, implements a control method for a microchannel heat exchange system.

[0083] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof. The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separate, and may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0084] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0085] The above provides a detailed description of the preferred embodiments of this application. However, this application is not limited to the above-described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by this application.

Claims

1. A microchannel heat exchange system, characterized in that, include: Heat exchanger body; An inlet guide channel is provided inside the heat exchanger body; The outlet manifold is located within the heat exchanger body. An ultrasonic transducer unit is disposed within the inlet guide groove and the outlet collecting cavity; A microchannel unit is disposed between the inlet guide channel and the outlet collection cavity. The microchannel unit includes multiple parallel first microchannels, and each first microchannel is provided with a Tesla valve guide section for unidirectional flow guidance. A temperature measuring unit is used to collect temperature values ​​at preset temperature measuring points on the microchannel unit. The controller is electrically connected to both the ultrasonic transducer unit and the temperature measuring unit. The first microchannel further includes: a first DC section and a second DC section, one end of the first DC section being connected to the inlet guide groove and the other end of the first DC section being connected to the Tesla valve guide section; one end of the second DC section being connected to the outlet collector cavity and the other end of the second DC section being connected to the Tesla valve guide section; The Tesla valve guide section includes a main channel and multiple Tesla valve structures, wherein the Tesla valve structures are disposed on the main channel and are connected to the main channel; The Tesla valve structure includes a first branch channel and a second branch channel connected in sequence, wherein the angle between the first branch channel and the main channel is greater than the angle between the second branch channel and the main channel.

2. The microchannel heat exchange system according to claim 1, characterized in that, The ultrasonic transducer unit includes a first ultrasonic transducer and a second ultrasonic transducer, wherein the first ultrasonic transducer is disposed in the inlet guide groove and the second ultrasonic transducer is disposed in the outlet collector cavity.

3. The microchannel heat exchange system according to claim 1, characterized in that, The microchannel unit further includes: multiple parallel second microchannels, wherein the second microchannels are conventional straight channels.

4. A control method for a microchannel heat exchange system, characterized in that, A controller for a microchannel heat exchange system as described in any one of claims 1 to 3, wherein the microchannel heat exchange system comprises: a heat exchanger body, an inlet guide channel, an outlet collector cavity, a microchannel unit, an ultrasonic transducer unit, and a temperature measuring unit; The method includes: The temperature measurement unit collects temperature values ​​at preset temperature measurement points on the microchannel unit. The intensity and frequency of the ultrasonic waves emitted by the ultrasonic transducer unit to the microchannel unit are controlled according to the temperature change of the temperature value.

5. The control method for the microchannel heat exchange system according to claim 4, characterized in that, The control of the sound intensity and frequency of the ultrasonic waves emitted by the ultrasonic transducer unit to the microchannel unit based on the temperature change of the temperature value includes: When the temperature change indicates that the temperature value has risen abnormally, the temperature range in which the temperature value falls is determined; The target sound intensity and target frequency are determined based on the temperature range. The ultrasonic transducer unit is controlled to emit ultrasonic waves to the microchannel unit according to the target sound intensity and the target frequency.

6. A controller, characterized in that, It includes at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to perform the control method of the microchannel heat exchange system as described in any one of claims 4 to 5.

7. A power battery, characterized in that, Including the microchannel heat exchange system as described in any one of claims 1 to 3.

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