CN-121994061-A - Microchannel heat exchange system, control method thereof, controller and power battery

CN121994061ACN 121994061 ACN121994061 ACN 121994061ACN-121994061-A

Abstract

The application discloses a micro-channel heat exchange system, a control method thereof, a controller and a power battery, and relates to the technical field of micro-channel heat exchange; 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, wherein 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 and comprises a plurality of first micro-channels which are arranged in parallel, a Tesla valve flow guide section for unidirectional flow guide is arranged on the first micro-channels, the temperature measuring unit is used for collecting temperature values at preset temperature measuring points on the micro-channel unit, and the controller is respectively and electrically connected with the ultrasonic vibrator unit and the temperature measuring unit. The application can greatly improve the critical heat flow density of the heat exchanger.

Inventors

DENG CONG
HUANG YU
HU HUASHENG
WANG LEI
ZHANG RUIDA
LI CHAOYANG
LI XUFENG
LIU JIAYUE
YANG NINGXIANG
GUO JIN

Assignees

广东省特种设备检测研究院（广东省特种设备事故调查中心）

Dates

Publication Date: 20260508
Application Date: 20260410

Claims (10)

1. A microchannel heat exchange system comprising: A heat exchanger body; an inlet diversion trench arranged in the heat exchanger body; An outlet manifold disposed within the heat exchanger body; The ultrasonic vibrator unit is arranged in the inlet diversion trench and the outlet flow collecting cavity; The micro-channel unit is arranged between the inlet diversion trench and the outlet manifold, and comprises a plurality of first micro-channels which are arranged in parallel, and a Tesla valve diversion section for unidirectional diversion is arranged on the first micro-channels; The temperature measuring unit is used for collecting temperature values from preset temperature measuring points on the micro-channel unit; And the controller is respectively and electrically connected with the ultrasonic vibrator unit and the temperature measuring unit.
2. The microchannel heat exchange system as set forth in claim 1 wherein the first microchannel further comprises a first DC section and a second DC section, one end of the first DC section being connected to the inlet flow channel, the other end of the first DC section being connected to the Tesla valve flow channel, one end of the second DC section being connected to the outlet manifold, the other end of the second DC section being connected to the Tesla valve flow channel.
3. The microchannel heat exchange system as set forth in claim 2 wherein the tesla valve flow directing section comprises a primary flow passage and a plurality of tesla valve structures disposed on the primary flow passage, the tesla valve structures in communication with the primary flow passage.
4. The microchannel heat exchange system as set forth in claim 3, wherein the tesla valve structure comprises a first branch flow passage and a second branch flow passage connected in sequence, and an included angle formed between the first branch flow passage and the main flow passage is larger than an included angle formed between the second branch flow passage and the main flow passage.
5. The microchannel heat exchange system as set forth in claim 1 wherein said ultrasonic vibrator unit comprises a first ultrasonic vibrator disposed in said inlet flow channel and a second ultrasonic vibrator disposed in said outlet flow manifold.
6. The microchannel heat exchange system as set forth in claim 1, wherein the microchannel unit further comprises a plurality of parallel second microchannels, the second microchannels being conventional straight channels.
7. A control method of a micro-channel heat exchange system, which is characterized by being applied to the controller of the micro-channel heat exchange system according to any one of claims 1 to 6, wherein the micro-channel heat exchange system comprises a heat exchanger body, an inlet diversion trench, an outlet flow collecting cavity, a micro-channel unit, an ultrasonic vibrator unit and a temperature measuring unit; The method comprises the following steps: Acquiring a temperature value from a preset temperature measuring point on the micro-channel unit through the temperature measuring unit; and controlling the sound intensity and the frequency of the ultrasonic waves emitted by the ultrasonic vibrator unit to the micro-channel unit according to the temperature change condition of the temperature value.
8. The method for controlling a micro-channel heat exchange system according to claim 7, wherein controlling the sound intensity and frequency of the ultrasonic wave emitted from the ultrasonic vibrator unit to the micro-channel unit according to the temperature change condition of the temperature value comprises: when the temperature change condition indicates that the temperature value is abnormally increased, determining a temperature interval in which the temperature value is located; determining corresponding target sound intensity and target frequency according to the temperature interval; and controlling the ultrasonic vibrator unit to send ultrasonic waves to the micro-channel unit according to the target sound intensity and the target frequency.
9. A controller comprising at least one processor and a memory for communicative connection with the at least one processor, the memory storing instructions executable by the at least one processor to enable the at least one processor to perform the method of controlling a microchannel heat exchange system according to any one of claims 7 to 8.
10. A power cell comprising a microchannel heat exchange system according to any one of claims 1 to 6.

Description

Microchannel heat exchange system, control method thereof, controller and power battery Technical Field The application relates to the technical field of micro-channel heat exchange, in particular to a micro-channel heat exchange system, a control method thereof, a controller and a power battery. Background The micro-channel heat exchanger has become a core heat exchange component in a high-density heat flow scene due to the advantages of small volume, high heat exchange coefficient, high response speed and the like. However, under the working condition of high heat flux density, the conventional micro-channel heat exchanger is easy to generate phenomena such as working medium backflow, bubble aggregation and the like, so that the temperature of the heat exchange wall surface is suddenly increased, and finally, critical heat flux density (CHF) is triggered, thereby limiting the application of the micro-channel heat exchanger in high heat flux density scenes (such as chip heat dissipation and power battery fast charge heat dissipation). Disclosure of Invention The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a micro-channel heat exchange system, a control method thereof, a controller and a power battery, which can greatly improve the critical heat flow density of the heat exchanger. In a first aspect, an embodiment of the present application provides a microchannel heat exchange system, including: A heat exchanger body; an inlet diversion trench arranged in the heat exchanger body; An outlet manifold disposed within the heat exchanger body; The ultrasonic vibrator unit is arranged in the inlet diversion trench and the outlet flow collecting cavity; The micro-channel unit is arranged between the inlet diversion trench and the outlet manifold, and comprises a plurality of first micro-channels which are arranged in parallel, and a Tesla valve diversion section for unidirectional diversion is arranged on the first micro-channels; The temperature measuring unit is used for collecting temperature values from preset temperature measuring points on the micro-channel unit; And the controller is respectively and electrically connected with the ultrasonic vibrator unit and the temperature measuring unit. According to some embodiments of the application, the microchannel unit further comprises a plurality of second microchannels arranged in parallel, the second microchannels being conventional straight channels. According to some embodiments of the application, the first microchannel further comprises a first direct current section and a second direct current section, wherein one end of the first direct current section is connected with the inlet diversion trench, the other end of the first direct current section is connected with the Tesla valve diversion section, one end of the second direct current section is connected with the outlet flow collecting cavity, and the other end of the second direct current section is connected with the Tesla valve diversion section. According to some embodiments of the application, the tesla valve diversion section includes a primary flow passage and a plurality of tesla valve structures disposed on the primary flow passage, the tesla valve structures in communication with the primary flow passage. According to some embodiments of the application, the Tesla valve structure comprises a first branch flow passage and a second branch flow passage which are connected in sequence, wherein an included angle formed between the first branch flow passage and the main flow passage is larger than an included angle formed between the second branch flow passage and the main flow passage. According to some embodiments of the application, the ultrasonic vibrator unit comprises a first ultrasonic vibrator and a second ultrasonic vibrator, wherein the first ultrasonic vibrator is arranged in an inlet flow guide groove, and the second ultrasonic vibrator is arranged in the outlet flow collecting cavity. In a second aspect, an embodiment of the present application provides a control method of a micro-channel heat exchange system, which is applied to the controller of the micro-channel heat exchange system according to any one of the embodiments of the first aspect, where the micro-channel heat exchange system includes a heat exchanger body, an inlet flow guide groove, an outlet flow manifold, a micro-channel unit, an ultrasonic vibrator unit, and a temperature measurement unit; The method comprises the following steps: Acquiring a temperature value from a preset temperature measuring point on the micro-channel unit through the temperature measuring unit; and controlling the sound intensity and the frequency of the ultrasonic waves emitted by the ultrasonic vibrator unit to the micro-channel unit according to the temperature change condition of the temperature value. According to some embodiments of the application,