CN-122008922-A - Integrated full liquid cooling charging pile equipment and intelligent temperature control method thereof

CN122008922ACN 122008922 ACN122008922 ACN 122008922ACN-122008922-A

Abstract

The application relates to an integrated full liquid cooling charging pile device and an intelligent temperature control method thereof, wherein the device comprises a cold plate heat exchanger, a circulating pump, a liquid cooling charging gun, a liquid storage tank and a liquid supply pump, wherein the liquid storage tank is communicated with the liquid cooling charging gun and an immersed power module cooling box; the liquid storage tank and the liquid cooling charging gun pipe are provided with liquid supply pumps, the liquid supply pumps are arranged on the liquid storage tank and the immersed power module cooling box, the input end of the circulating pump is communicated with the liquid cooling charging gun and the immersed power module cooling box, the circulating pump is communicated with the cold plate heat exchanger, and the cold plate heat exchanger is communicated with the liquid storage tank through the pipeline. The application adopts a circulating pump parallel cooling architecture, and connects the power module and the charging gun in parallel, the cooling liquid is pumped into the same cold plate heat exchanger after being mixed, and finally returns to the liquid storage tank to construct a closed loop, so that the heat carried by the cooling liquid is quickly transferred to an external cold source, the high-efficiency heat dissipation capability allows the power module to stably work at higher temperature and power, and the service lives of the charging gun and the power module are prolonged.

Inventors

CUI XINTAO
ZOU JICHEN
LU GUI

Assignees

华北电力大学

Dates

Publication Date: 20260512
Application Date: 20260206

Claims (10)

1. The integrated full liquid cooling charging pile device comprises a cold plate heat exchanger, a circulating pump, an immersed power module cooling box, a liquid cooling charging gun, a liquid storage tank and a liquid supply pump, and is characterized in that: the liquid storage tank is communicated with the liquid cooling charging gun and the immersed power module cooling box through pipelines, and a liquid supply pump is arranged on the pipeline between the liquid storage tank and the liquid cooling charging gun; The input end of the circulating pump is communicated with the liquid cooling charging gun and the immersed power module cooling box through a three-way pipe and a pipeline, the output end of the circulating pump is communicated with the cold plate heat exchanger through a pipeline, and the cold plate heat exchanger is communicated with the liquid storage tank through a pipeline.
2. The integrated full liquid cooling charging pile device according to claim 1, wherein a filter, a pressure sensor, a flow control valve and a flowmeter are arranged on a pipeline between the liquid storage tank and the liquid cooling charging gun, and the filter, the pressure sensor, the flow control valve and the flowmeter are fixedly arranged on a pipeline between the circulating pump and the immersed power module cooling tank.
3. The integrated full liquid cooling charging pile device according to claim 1 is characterized in that temperature sensors are fixedly arranged on the outer side of a box body of a cooling box of an immersed power module and at the position of a gun head of a liquid cooling charging gun, a pressure sensor, a temperature sensor and a flowmeter are arranged on a pipeline between a circulating pump and a cold plate heat exchanger, a high-level liquid level meter and a low-level liquid level meter are arranged on the inner wall of a liquid storage tank, and an automatic exhaust valve is arranged at the top of the liquid storage tank.
4. The integrated full liquid cooling charging pile device of claim 1, wherein the immersed power module cooling box is internally provided with a flow guiding structure, the flow guiding structure comprises a flow guiding plate and a flow disturbing column, the flow guiding plate guides cooling liquid to flow along the arrangement direction of the power module, and the flow disturbing column is arranged in a gap of the power module.
5. The integrated full liquid cooling charging pile device of claim 1, wherein a liquid collecting part and a gas-liquid separation structure are arranged in a low-level area in front of an input end of the circulating pump, and the liquid collecting part is in a conical design; The gas-liquid separation structure is a stainless steel closed cavity, the gas-liquid separation structure comprises a conical liquid collecting and precipitating area, a diversion defoaming separation area and an air chamber exhaust area, and a liquid inlet and a liquid outlet are arranged on the side face of the cavity of the gas-liquid separation structure.
6. The integrated full liquid cooling charging pile device of claim 1, wherein the liquid cooling charging gun comprises a gun head section, a holding section and a gun section, wherein internal liquid cooling channels of the gun head section, the holding section and the gun section are in seamless penetration, the gun head section adopts a surrounding type liquid cooling cavity, a liquid inlet adapter and a terminal base heat conduction embedding structure, the holding section adopts a channel switching and sealing maintenance structure, and the gun section adopts a coaxial structure of an inner conductor bundle and a liquid cooling sleeve.
7. The integrated full liquid cooling charging pile device according to claim 1 is characterized in that a liquid inlet connector and a data transmission connector are fixedly arranged at the upper end of the rear side of a cooling box of an immersed power module, a liquid return connector is arranged at the lower end of the rear side of the box, a plurality of three-phase electric alternating current input connectors and direct current output connectors are arranged at the rear side of the box of the cooling box of the immersed power module, a transparent window is embedded in the upper end of the front side of the box, and a metal fixing support is detachably and fixedly arranged inside the cooling box of the immersed power module.
8. An intelligent temperature control method using the integrated full liquid cooling charging pile device of claims 1-7, comprising: After the main controller is started, completing the self-checking of hardware and communication, and alarming and prohibiting charging when the self-checking is abnormal; filtering and denoising, time synchronization and normalization are carried out on the collected original data, and standardized data is output; Establishing a comprehensive analysis model based on standardized data, completing heat dissipation requirement judgment, feedforward compensation, decision query and PID fine adjustment, calculating target parameters of an execution part, identifying abnormality and outputting a temporary regulation instruction; Converting the analysis result into an execution control signal, generating a final instruction set after passing the safety check, and recalculating if the check fails; the main controller issues instructions to each execution unit to execute heat dissipation regulation and control, and acquires the executed system state to form a feedback signal; and feeding back the feedback signal and the alarm information to an intelligent analysis module, dynamically optimizing the regulation and control parameters, and preferentially executing emergency measures when abnormal, so as to realize closed-loop temperature control.
9. The intelligent temperature control method of the integrated full liquid cooling charging pile device of claim 8, wherein the building of the comprehensive analysis model comprises the following steps: Establishing a comprehensive analysis model, namely setting target function parameters by taking the minimum system operation energy consumption as a target function and combining with the operation power consumption characteristics of a liquid supply pump, wherein constraint conditions comprise thermal safety constraint, flow generation constraint and executor limiting constraint, and the thermal safety constraint needs to ensure that the real-time temperature of a power module and the gun head of a charging gun does not exceed the respective allowable maximum working temperature; judging the heat dissipation demand level according to the current system state and generating a preliminary control target; Calculating an environmental temperature compensation coefficient according to the real-time environmental temperature and a preset compensation gain, calculating the basic flow demands of the power module branch and the charging gun branch, and simplifying a flow model through inverse solution to obtain a feedforward rotation speed increment required by meeting the basic flow; inquiring a decision rule base, namely inquiring a preset two-dimensional decision rule base according to the combination of the power module and the charging gun demand level, determining a basic control strategy, and obtaining the basic rotating speed of the liquid supply pump and the basic opening of the flow control valve; and regulating the branch circuits with the demand level in a normal regulation state by adopting a controller, and realizing regulation by combining the real-time temperature deviation, the historical temperature deviation accumulation value and the temperature change rate through a proportional coefficient, an integral coefficient and a differential coefficient, thereby finally synthesizing the target control quantity of the liquid supply pump of the power module branch circuits and the charging gun branch circuits.
10. The intelligent temperature control method of the integrated full liquid cooling charging pile device according to claim 9, wherein the state prediction and the comprehensive judgment complete the thermal state assessment by calculating the temperature deviation and the temperature change rate, the heat dissipation requirements are divided into different grades based on the temperature deviation and the temperature change rate, and the requirement grades of the power module and the charging gun are respectively output.

Description

Integrated full liquid cooling charging pile equipment and intelligent temperature control method thereof Technical Field The application relates to the technical field of electric automobile charging equipment, in particular to integrated full liquid cooling charging pile equipment and an intelligent temperature control method thereof. Background With the popularization of electric vehicles, the requirements of users on energy supplementing efficiency are continuously upgraded, a high-power and ultra-fast charging technology becomes a core race track for the development of new energy vehicle industry, the energy supplementing experience of charging images is realized, technological breakthroughs from a battery, a vehicle end and a pile end to a foundation full-link are completed, liquid cooling ultra-charging and megawatt-level fast charging become main flow directions, and meanwhile, a passenger vehicle and a commercial vehicle ultra-fast charging technology are in double-line parallel, so that the new energy vehicles are driven to span from energy utilization to good utilization. With the popularization of electric automobiles, high-power and ultra-fast charging technologies have become a development trend. However, the prior art has the obvious defects that the charging power is increased to cause the power module and the charging gun in the charging pile to generate a large amount of heat, the traditional air cooling heat dissipation mode can not meet the heat dissipation requirement, and the prior art has the defects that (1) the air cooling heat exchange coefficient is low, the heat dissipation efficiency is low, the heat density generated by continuous high-power operation is difficult to cope with, and the power device is easy to overheat and derate or damage. (2) High power fans are required for high power heat dissipation, producing significant noise pollution. (3) The air cooling needs to be provided with holes, so that dust and moisture are easy to enter, and the electrical safety and the service life of equipment are influenced. The gun head part of the charging gun has narrow space and complex structure, and the internal conductor and the contact point of the charging gun are difficult to be directly and effectively cooled by air cooling. At present, part of schemes adopt liquid cooling charging guns, but a cooling loop of the liquid cooling charging guns is independent of a cooling system of a power module in a pile, and the problems of two sets of circulation, complex structure and high cost exist. There are also schemes for cooling power modules with cold plates, but cold plates are usually only in contact with the device substrate, and thermal resistance still exists. Therefore, the invention provides integrated full liquid cooling charging pile equipment and an intelligent temperature control method thereof. Disclosure of Invention In order to overcome the defects in the prior art, the application provides integrated full liquid cooling charging pile equipment and an intelligent temperature control method thereof, and particularly adopts the following technical scheme. An integrated full liquid cooling charging pile device comprises a cold plate heat exchanger, a circulating pump, an immersed power module cooling box, a liquid cooling charging gun, a liquid storage tank, a liquid supply pump A and a liquid supply pump B. The liquid storage tank is respectively communicated with the liquid cooling charging gun and the immersed power module cooling box through pipelines, a liquid supply pump B is arranged on the pipeline between the liquid storage tank and the liquid cooling charging gun, and a liquid supply pump A is arranged on the pipeline between the liquid storage tank and the immersed power module cooling box. The input end of the circulating pump is communicated with the liquid cooling charging gun and the immersed power module cooling box through a three-way pipe and a pipeline. The output end of the circulating pump is communicated with the cold plate heat exchanger through a pipeline, and the cold plate heat exchanger is communicated with the liquid storage tank through a pipeline. As an alternative scheme of the invention, a filter, a pressure sensor, a flow control valve and a flowmeter are arranged on a pipeline between the liquid storage tank and the liquid cooling charging gun. A fifty mesh filter screen is detachably and fixedly arranged on the filter. A filter, a pressure sensor, a flow control valve and a flowmeter are fixedly arranged on a pipeline between the circulating pump and the immersed power module cooling box. As an alternative scheme of the invention, temperature sensors are fixedly arranged at the outer side of a cooling box body of the immersed power module and at the gun head of the liquid cooling charging gun, the temperature sensors directly collect real-time temperature of heating components, the temperature sensors are arranged on a liquid inlet end pipe