CN-114784318-B - Device for performing rapid heat exchange based on heat conduction and medium phase change

Abstract

The invention provides a device for performing rapid heat exchange based on heat conduction and medium phase change, which comprises at least one group of heat exchange components, wherein the heat exchange components comprise a hydrogen heat exchange part, an air heat exchange part and an integrated device shell, the hydrogen heat exchange part is arranged in the integrated device shell along a first direction, the air heat exchange part is arranged in the integrated device shell along a second direction, the first direction is intersected with the second direction, the hydrogen heat exchange part is positioned above the air heat exchange part, high-temperature gas after heat exchange of the air heat exchange part rises to exchange heat with low-temperature hydrogen of the upper hydrogen heat exchange part, and low-temperature gas after heat exchange of the hydrogen heat exchange part descends based on gravity and then exchanges heat with the lower air heat exchange part again, and the device is reciprocally circulated to cool high-temperature air and heat low-temperature hydrogen so as to realize rapid heat exchange. The invention effectively improves the integration level of the whole machine, reduces the cooling liquid capacity in the thermal management system, improves the response speed of the system temperature control and improves the robustness of the thermal management system.

Inventors

• LI FEIQIANG
• GAO YUNQING
• WEN CHAO
• DING XINJIAN
• LI JIAYING

Assignees

• 北京亿华通科技股份有限公司

Dates

Publication Date

20260508

Application Date

20220603

Claims (6)

1. 1. An apparatus for rapid heat exchange based on heat transfer and medium phase change, the apparatus comprising: at least one group of heat exchange components comprising a hydrogen heat exchange part, an air heat exchange part and an integrated device shell; The hydrogen heat exchange part is arranged in the integrated device shell along a first direction, the air heat exchange part is arranged in the integrated device shell along a second direction, and the first direction is intersected with the second direction; The hydrogen heat exchange part is positioned above the air heat exchange part, the high-temperature gas after heat exchange of the air heat exchange part rises to exchange heat with the low-temperature hydrogen of the hydrogen heat exchange part above, the low-temperature gas after heat exchange of the hydrogen heat exchange part descends based on gravity and exchanges heat with the air heat exchange part below again, and the high-temperature air is cooled and the low-temperature hydrogen is heated to realize rapid heat exchange; The angle a between the first direction and the second direction ranges from 0 ° < a <90 °,90 ° < a <180 °; The heat exchange assembly further comprises a phase change material, wherein the phase change material is filled in the integrated device shell and can change phase when absorbing heat or releasing heat; The height of the phase change material filled in the integrated device shell is not higher than the bottom of the hydrogen heat exchange part and not lower than the top of the air heat exchange part; the heat exchange assembly further comprises a heat exchange tube, and the heat exchange tube is arranged around the hydrogen heat exchange part and the air heat exchange part along the circumferential direction.
2. 2. The device for rapid heat exchange based on heat transfer and medium phase change according to claim 1, wherein the heat exchange tubes have a diameter larger than a distance between two adjacent heat exchange tubes, and all the heat exchange tubes have the same diameter.
3. 3. The device for rapid heat exchange based on heat conduction and medium phase change according to claim 2, wherein the hydrogen heat exchange part comprises a hydrogen heat exchanger, a hydrogen cavity is arranged in the hydrogen heat exchanger, and the extending direction of the hydrogen cavity is perpendicular to the direction of the heat exchange tube.
4. 4. A device for rapid heat exchange based on heat transfer and medium phase change according to claim 3 wherein the air heat exchange section comprises an intercooler having an air chamber extending in a direction perpendicular to the direction of the heat exchange tube intersecting but not perpendicular to the direction of extension of the hydrogen chamber.
5. 5. The device for rapid heat exchange based on heat transfer and medium phase change according to claim 1, wherein the hydrogen heat exchange portion and the air heat exchange portion are spaced apart by a predetermined distance, the predetermined distance being one half of the length of the hydrogen heat exchange portion or the air heat exchange portion.
6. 6. The apparatus for rapid heat exchange based on heat transfer and medium phase change according to claim 1, wherein the flow direction of hydrogen in the hydrogen heat exchange part and the air heat exchange part is opposite to the flow direction of air.

Description

Device for performing rapid heat exchange based on heat conduction and medium phase change Technical Field The invention belongs to the technical field of fuel cells, and particularly relates to a device for performing rapid heat exchange based on heat conduction and medium phase change. Background With the increasing emphasis of energy problems and environmental pollution problems, new energy automobiles are receiving more and more attention as a substitute for the traditional fuel automobiles at present, wherein electric automobiles using lithium ion batteries as power sources have become research hotspots of various automobile manufacturers and scientific research institutions. Similar to the traditional engine, the lithium ion power battery can emit heat in the working process, if a proper heat pipe understanding solution is not available, thermal runaway is extremely easy to occur, and the power battery is triggered to catch fire, burn and even explode, so that serious threat is generated to the personal safety of drivers and passengers. In the electric automobile model sold at present, the heat dissipation of the power battery mainly depends on an air convection mode and a liquid convection mode, and the liquid medium has the advantages that the battery module can achieve better temperature uniformity due to higher heat conductivity coefficient, and the like, and is considered as the development direction of a power battery thermal management system in the future. However, in addition to the heat dissipation required for normal operation of the power cell, the battery pack needs to be preheated under low temperature conditions, especially when the ambient temperature is below 0 ℃. Studies have shown that when a power battery is discharged below 0 ℃, its internal resistance increases dramatically, thereby affecting battery life. The heat transfer path of the temperature control device provided by the related technology is that an intercooler is connected with a hydrogen heat exchanger in series and then connected with a main path of a thermal management system in parallel, and pipelines for connecting all components are required to be arranged for the intercooler and the hydrogen heat exchanger. However, the temperature control method provided by the related technology has higher temperature control delay, the specific heat capacity of the cooling liquid is larger, and a branch circuit of which the intercooler is connected with the hydrogen heat exchanger in series is connected in parallel on the main circuit of the heat management system, so that the cooling liquid capacity of the system is increased, the delay of the system on temperature control is not beneficial to improvement, the robustness of the temperature control of the heat management system is reduced, the load of the water pump is larger, and the development difficulty is large. Disclosure of Invention The invention provides a method for preparing a metal supporting monomer by adopting a co-casting method, which can solve the technical problems that the metal supporting monomer prepared by adopting an impregnation method can cause coarsening of crystal grains after long-term operation, and the battery performance is attenuated and the stability is influenced. The technical scheme provided by the invention is as follows: An apparatus for rapid heat exchange based on heat conduction and medium phase change, the apparatus comprising: at least one group of heat exchange components comprising a hydrogen heat exchange part, an air heat exchange part and an integrated device shell; The hydrogen heat exchange part is arranged in the integrated device shell along a first direction, the air heat exchange part is arranged in the integrated device shell along a second direction, and the first direction is intersected with the second direction; the hydrogen heat exchange part is located above the air heat exchange part, high-temperature gas after heat exchange of the air heat exchange part rises to exchange heat with low-temperature hydrogen of the hydrogen heat exchange part above, low-temperature gas after heat exchange of the hydrogen heat exchange part descends based on gravity and exchanges heat with the air heat exchange part below again, and the high-temperature gas is cooled by reciprocating circulation, and low-temperature hydrogen is heated to realize rapid heat exchange. In an alternative embodiment, the angle α between the first direction and the second direction ranges from 0 ° < α <90 °,90 ° < α <180 °. In an alternative embodiment, the heat exchange assembly further comprises a phase change material filled within the integrated device housing, the phase change material being capable of undergoing a phase change upon absorbing or releasing heat. In an alternative embodiment, the phase change material is filled in the integrated device housing to a height not higher than the bottom of the hydrogen heat exchange portion and not lower than t