CN-224217474-U - Liquid cooling heat radiation structure, DCDC converter, fuel cell system and vehicle

CN224217474UCN 224217474 UCN224217474 UCN 224217474UCN-224217474-U

Abstract

The utility model relates to a liquid cooling heat dissipation structure, a DCDC converter, a fuel cell system and a vehicle, which comprises a shell and a three-dimensional flow equalization assembly, wherein the shell comprises a first shell and a second shell, the first shell and the second shell are matched to form a cavity for cooling liquid to pass through, the three-dimensional flow equalization assembly is arranged in the cavity between the first shell and the second shell, and comprises a flow equalization heat conduction plate and at least one flow equalization heat conduction column arranged on the flow equalization heat conduction plate.

Inventors

WANG FEI
ZHAO DEQI
CHEN JIE
Shi Lianzhi
WU RENHUA

Assignees

深圳欣锐科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250526

Claims (10)

1. A liquid-cooled heat sink structure, comprising: The shell comprises a first shell and a second shell, wherein the first shell and the second shell are matched to form a cavity for cooling liquid to pass through; The three-dimensional flow equalizing assembly is arranged in the cavity and comprises a flow equalizing heat conducting plate and at least one flow equalizing heat conducting column arranged on the flow equalizing heat conducting plate; The flow equalizing heat-conducting plate, the first shell and the second shell are provided with gaps, and the cavity is divided into a first accommodating cavity between the flow equalizing heat-conducting plate and the first shell and a second accommodating cavity between the flow equalizing heat-conducting plate and the second shell by the flow equalizing heat-conducting plate; The heat-conducting plate comprises at least one flow equalizing hole penetrating through the heat-conducting plate, the first accommodating cavity is communicated with the second accommodating cavity through the flow equalizing hole, and the flow equalizing heat-conducting columns are arranged at intervals with the flow equalizing holes.
2. The liquid-cooled heat dissipating structure of claim 1 wherein the flow-equalizing heat conductive post has opposite first and second ends, the first end extending into the first receiving chamber and the second end extending into the second receiving chamber.
3. The liquid-cooled heat sink structure of claim 1, further comprising: The liquid inlet is arranged on the first shell or the second shell and is communicated with the cavity; The liquid outlet is arranged in the first shell or the second shell and is communicated with the cavity.
4. The liquid cooling structure according to claim 3, wherein the liquid inlet and the liquid outlet are both disposed in the second housing, the liquid inlet is communicated with the second accommodating cavity, and the liquid outlet is communicated with the second accommodating cavity.
5. The liquid cooling heat dissipation structure according to claim 1, wherein the flow equalizing heat conducting plate is formed with a connecting rib extending along a preset direction, and the connecting rib is used for guiding the cooling liquid to flow along the preset direction.
6. The liquid cooling heat dissipation structure according to claim 1, wherein the three-dimensional current sharing component further comprises at least one connecting column arranged on the current sharing heat conducting plate, the connecting column is provided with a first connecting end and a second connecting end which are opposite, the first connecting end extends to the first accommodating cavity, the first connecting end is connected to the first housing, the second connecting end extends to the second accommodating cavity, the second connecting end is connected to the second housing, and the first housing and the second housing are connected through the connecting column.
7. A DCDC converter comprising a main power board and a liquid-cooled heat sink structure according to any one of claims 1-6, wherein the main power board is attached to the liquid-cooled heat sink structure.
8. The DCDC converter of claim 7, further comprising a cooling water channel having an inlet and an outlet, said inlet of said cooling water channel in communication with said inlet of said liquid cooled heat sink structure, said outlet of said cooling water channel in communication with a liquid outlet of said liquid cooled heat sink structure.
9. A fuel cell system comprising a stack and the DCDC converter according to claim 7 or 8, the DCDC converter being connected to the stack by a connection copper bar.
10. A vehicle comprising the fuel cell system of claim 9 and a power system, the fuel cell system being coupled to the power system.

Description

Liquid cooling heat radiation structure, DCDC converter, fuel cell system and vehicle Technical Field The present utility model relates to a liquid cooling structure, and more particularly, to a liquid cooling structure, a DCDC converter, a fuel cell system, and a vehicle. Background Currently, increasing the power of hydrogen fuel cell systems is a major technical development direction, with the objective of providing more powerful power and longer endurance for the whole vehicle. However, high power operation produces a larger current, which causes more heat loss to occur in the power device. In a DCDC converter of a hydrogen fuel cell system, SIC, gaN, and the like are often used as main electronic power devices, and therefore, efficient heat dissipation is performed on these power devices, which directly relates to the reliability of the entire product. At present, a die-casting water-cooling radiator is mostly adopted in the industry to solve the heat dissipation problem, but the scheme has difficulty in molding due to the die-casting process, so that the thickness of a heat dissipation wall is large, the heat conduction path is influenced, and the heat conduction efficiency is reduced. Disclosure of utility model The present utility model is directed to a liquid cooling structure, which solves the above-mentioned problems in the prior art. In order to solve the problems, in a first aspect, in one embodiment, a liquid cooling heat dissipation structure is provided, which comprises a shell, a three-dimensional flow equalizing assembly and a three-dimensional flow equalizing assembly, wherein the shell comprises a first shell and a second shell, the first shell and the second shell are matched to form a cavity for cooling liquid to pass through, the three-dimensional flow equalizing assembly is arranged in the cavity between the first shell and the second shell, and the three-dimensional flow equalizing assembly comprises a flow equalizing heat conducting plate and at least one flow equalizing heat conducting column arranged on the flow equalizing heat conducting plate. The heat-equalizing heat-conducting plate, the first shell and the second shell are provided with gaps, the heat-equalizing heat-conducting plate divides the cavity into a first accommodating cavity between the heat-equalizing heat-conducting plate and the first shell, and a second accommodating cavity between the heat-equalizing heat-conducting plate and the second shell. The heat-conducting plate comprises at least one flow-equalizing hole penetrating through the heat-conducting plate, the first accommodating cavity is communicated with the second accommodating cavity through the flow-equalizing hole, and the at least one flow-equalizing heat-conducting column is arranged at intervals with the flow-equalizing hole. According to the liquid cooling heat dissipation structure, the two layers of light shells and the middle three-dimensional flow equalization component are welded to form the liquid cooling heat radiator with high sealing strength and high heat transfer efficiency, so that a heat exchange path of a heat conduction power device can be reduced, and the design of the flow equalization heat conduction plate and the flow equalization heat conduction column in the three-dimensional flow equalization component can enlarge the contact area with cooling liquid and has high-efficiency and rapid heat conduction effect. Through setting up the heat conduction post that flow equalizes, can improve the intensity of liquid cooling heat radiation structure, effectively disperse hydraulic deformation stress, the shell warp when preventing that the hydraulic pressure is too big and makes power device damage, reduces the risk that power device became invalid. In one embodiment, the flow equalizing heat conducting post is provided with a first end and a second end which are opposite, wherein the first end extends into the first accommodating cavity, and the second end extends into the second accommodating cavity. In one embodiment, the flow equalization heat conduction column is a gradual flow equalization heat conduction column, and the gradual flow equalization heat conduction column comprises an elliptical column. In one embodiment, the first housing includes a first set of mounting holes spaced along an edge thereof and the second housing includes a second set of mounting holes spaced along an edge thereof, wherein the first set of mounting holes are spaced from the second set of mounting holes to effect connection of the first housing to the second housing. In one embodiment, the liquid cooling heat dissipation structure further comprises a liquid inlet which is arranged on the first shell or the second shell and communicated with the cavity, and a liquid outlet which is arranged on the first shell or the second shell and communicated with the cavity. In one embodiment, the first housing includes a first target side, the second housing inclu