Charging pile power supply module thermal management device

Abstract

The utility model relates to the technical field of charging pile thermal management, in particular to a thermal management device for a charging pile power supply module. The system comprises a charging cabinet, a plurality of power modules are fixed in the charging cabinet, liquid inlets and liquid outlets are formed in the surfaces of the power modules, a liquid cooling unit is fixed in the charging cabinet, the liquid outlet end of the liquid cooling unit is connected with the liquid inlet end of a first-stage liquid inlet pipe, the liquid outlet end of the first-stage liquid inlet pipe is communicated with the liquid inlet ends of a plurality of second-stage liquid inlet pipes, and the liquid inlet ends of the second-stage liquid inlet pipes are communicated with the liquid inlet ends of the second-stage liquid inlet pipes. The liquid outlet ends of the plurality of secondary liquid inlet pipes are respectively communicated with the liquid inlets of the plurality of power supply modules in a one-to-one correspondence manner, the liquid outlets of the plurality of power supply modules are respectively communicated with the liquid inlet ends of the plurality of secondary liquid outlet pipes in a one-to-one correspondence manner, and the liquid outlet ends of the plurality of secondary liquid outlet pipes are communicated with the liquid inlet end of the primary liquid return pipe; and the liquid outlet end of the primary liquid return pipe is connected with the liquid return end of the liquid cooling unit. According to the utility model, the on-off of the cooling path of the branch circuit where the power supply module is located can be controlled according to the start-stop state of the power supply module, and more accurate system heat dissipation is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal management of charging piles, in particular to a thermal management device for a power module of a charging pile. Background Art

[0002] The charging power host is an important device for charging electric vehicles, which is generally composed of a charging system and a liquid cooling system. The charging system consists of an ACDC power supply, a DCDC power supply, a control board, and various electrical appliances. The power module has too high power and too much concentrated heat, which requires forced heat dissipation. At present, liquid cooling is commonly used for high-power power modules.

[0003] In the prior art, the charging stack system does not control the flow distribution in the cabinet. Since the charging stack does not always run at full power, the internal power modules will be adjusted according to the power demand, so sometimes only a few of the internal power modules may remain in operation, so the traditional thermal management system cannot accurately control the temperature, which will also cause energy waste. Utility Model Content

[0004] In response to the shortcomings in the above-mentioned existing production technology, the present application provides a thermal management device for the power module of a charging stack, which can control the on-off of the cooling passage of the branch where the power module is located according to the start and stop status of the power module, thereby achieving more accurate system heat dissipation; at the same time, it can adjust the dynamic flow of the cooling medium in real time according to the working number of the power module, thereby reducing unnecessary waste of cooling capacity.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A charging stack power module thermal management device comprises a charging cabinet, wherein a plurality of power modules are fixed in the charging cabinet, and liquid inlets and liquid outlets are arranged on the surfaces of the plurality of power modules, and the device is characterized in that: a liquid cooling unit is fixed in the charging cabinet, and the liquid outlet end of the liquid cooling unit is connected to the liquid inlet end of a primary liquid inlet pipe, and the liquid outlet end of the primary liquid inlet pipe is respectively connected to the liquid inlet ends of a plurality of secondary liquid inlet pipes, and the liquid outlet ends of the plurality of secondary liquid inlet pipes are respectively connected to the liquid inlets of a plurality of power modules in a one-to-one correspondence, and the liquid outlets of the plurality of power modules are respectively connected to the liquid inlets of the plurality of secondary liquid outlet pipes. The ends are connected one by one, the liquid outlet ends of multiple secondary liquid outlet pipes are connected to the liquid inlet end of the primary liquid return pipe, and the liquid outlet end of the primary liquid return pipe is connected to the liquid return end of the liquid cooling unit; a control cabinet is fixed in the charging cabinet, and a control board is arranged in the control cabinet. A pipeline switch is arranged on each secondary liquid inlet pipe, and the pipeline switch can control the on and off of the secondary liquid inlet pipe. The pipeline switch is electrically connected to the control board, and the power module is electrically connected to the control board. The control board controls the opening and closing of the pipeline switch of the cooling branch where the power module is located according to the opening and closing signals of the power module.

[0007] Furthermore, the power module is an ACDC power module or a DCDC power module.

[0008] Furthermore, a liquid cooling channel is provided on the power module, and a liquid cooling medium can flow in the liquid cooling channel, and the liquid cooling channel is respectively connected to the liquid inlet and the liquid outlet.

[0009] Furthermore, the pipeline switch is a solenoid valve, and the liquid cooling medium is cooling water or cooling oil.

[0010] Furthermore, the pipeline switch is an electromagnetic coil, the liquid cooling medium is a magnetic fluid, and the magnetic field generated by the electromagnetic coil can control the flow of the magnetic fluid.

[0011] Furthermore, a water pump is arranged on the first-level liquid inlet pipe.

[0012] Furthermore, the water pump is electrically connected to the control board, and the control board adjusts the rotation speed of the water pump according to the number of power modules turned on.

[0013] The beneficial effects of the utility model are as follows:

[0014] The utility model can control the on-off of the cooling passage of the branch where the power module is located according to the start and stop status of the power module, thereby achieving more accurate system heat dissipation; at the same time, it can adjust the dynamic flow of the cooling medium in real time according to the working number of the power module, reduce unnecessary waste of cooling capacity, and optimize thermal management. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model.

[0016] Figure 2 This is the control principle diagram of the utility model.

[0017] Among them: 1. Charging cabinet; 2. Liquid cooling unit; 3. Water pump; 4. Control cabinet; 5. First-level liquid inlet pipe; 6. First-level liquid return pipe; 7. Second-level liquid inlet pipe; 8. Pipeline switch; 9. Power module; 10. Second-level liquid outlet pipe. DETAILED DESCRIPTION

[0018] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0019] like Figure 1 As shown, a charging stack power module thermal management device includes a charging cabinet 1, in which three power modules 9 are fixed. The power modules 9 can be ACDC power modules or DCDC power modules. When charging, all or part of the multiple power modules 9 supply power to the outside.

[0020] A liquid cooling channel is provided on the power module 9, and a liquid cooling medium can flow in the liquid cooling channel, and the power module 9 is cooled by the flow of the liquid cooling medium. A liquid inlet and a liquid outlet are provided on the surface of the power module 9, and the liquid inlet and the liquid outlet are respectively connected to the liquid cooling channel, and the external liquid cooling medium enters the liquid cooling channel through the liquid inlet, and then flows out of the power module 9 through the liquid outlet.

[0021] like Figure 1 As shown, a liquid cooling unit 2 is fixed in the charging cabinet 1, and the liquid outlet of the liquid cooling unit 2 is connected to the liquid inlet of the primary liquid inlet pipe 5, and the liquid outlet of the primary liquid inlet pipe 5 is respectively connected to the liquid inlet of three secondary liquid inlet pipes 7, and the liquid outlets of the three secondary liquid inlet pipes 7 are respectively connected to the liquid inlets of three power modules 9 in a one-to-one correspondence, and the liquid outlets of the three power modules 9 are respectively connected to the liquid inlets of three secondary liquid outlet pipes 10 in a one-to-one correspondence. The liquid outlets of the three secondary liquid outlet pipes 10 are connected to the liquid inlet of the primary liquid return pipe 6, and the liquid outlet of the primary liquid return pipe 6 is connected to the liquid return end of the liquid cooling unit 2.

[0022] like Figure 1 As shown, a control cabinet 4 is fixed in the charging cabinet 1, and a control panel is arranged in the control cabinet 4, and the control panel can adopt a PLC control panel. A pipeline switch 8 is arranged on each secondary liquid inlet pipe 7, and the pipeline switch 8 can control the on and off of the secondary liquid inlet pipe 7. The pipeline switch 8 can adopt a solenoid valve, and the liquid cooling medium adopts cooling water or cooling oil.

[0023] like Figure 2 As shown, the pipeline switch 8 is electrically connected to the control board, the power module 9 is electrically connected to the control board, and the control board controls the opening and closing of the solenoid valve of the cooling branch where the power module 9 is located according to the opening and closing signals of a certain power module 9. During specific operation, according to the working condition that the charging system needs to output power, the control board controls the required power module to be turned on. At the same time, the control board controls the solenoid valve of the cooling branch where the power module 9 is located to open the cooling channel, and the cooling medium in the primary liquid inlet pipe 5 can flow into the cooling branch where the turned-on power module 9 is located to cool the turned-on power module 9.

[0024] like Figure 1 As shown, a water pump 3 is arranged on the primary liquid inlet pipe 5 , and the rotation speed of the water pump 3 can determine the flow rate of the cooling medium in the primary liquid inlet pipe 5 .

[0025] like Figure 2 As shown, the water pump 3 is electrically connected to the control board, and the control board adjusts the rotation speed of the water pump 3 according to the number of power modules 9 turned on, thereby controlling the flow of the cooling medium in the primary liquid inlet pipe 5.

[0026] The pipeline switch 8 can also use an electromagnetic coil, and the liquid cooling medium is matched with a magnetic fluid. The magnetic field generated by the electromagnetic coil can control the flow of the magnetic fluid. During specific operation, according to the working condition of the charging system that needs to output power, the control board controls the required power module to turn on. At the same time, the electromagnetic coil of the cooling branch where the power module 9 is turned on is turned off, and the magnetic fluid in the primary liquid inlet pipe 5 can smoothly flow into the cooling branch where the turned-on power module 9 is located to cool the turned-on power module 9. The electromagnetic coil of the cooling branch where the power module 9 is in the closed state is controlled by the control board to turn on and generate a magnetic field. The magnetic fluid in the cooling branch is affected by the magnetic field of the electromagnetic coil and does not flow, and does not enter the liquid cooling channel of the power module 9 for cooling. The working mode of using an electromagnetic coil to control the magnetic fluid can achieve more precise control and precise cooling.

[0027] The working principle of the utility model is: when the charging system is working, the control board controls the appropriate number of power modules 9 to start working according to the output power. Then the control board controls the pipeline switch 8 of the branch where the power module is located to open according to the start-up status of the power module, so that the cooling medium in the primary liquid inlet pipe 5 enters the secondary liquid inlet pipe 7 where the turned-on power module is located, and cools the turned-on power module 9. At the same time, the start and stop status of the power module 9 will be fed back to the control board, and the control board adjusts the cooling flow output by the liquid cooling unit 2 in real time according to the start and stop number of the power modules 9, reducing unnecessary waste of cold. The utility model controls the thermal management water inlet logic through the charging condition logic, which can optimize the allocation of thermal management resources and reduce resource waste. More accurate heat dissipation of the system.

[0028] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A charging stack power module thermal management device, comprising a charging cabinet (1), wherein a plurality of power modules (9) are fixed inside the charging cabinet (1), and liquid inlets and liquid outlets are arranged on the surfaces of the plurality of power modules (9), characterized in that: A liquid cooling unit (2) is fixed in the charging cabinet (1), a liquid outlet end of the liquid cooling unit (2) is connected to a liquid inlet end of a first-level liquid inlet pipe (5), the liquid outlet end of the first-level liquid inlet pipe (5) is respectively connected to the liquid inlet ends of a plurality of second-level liquid inlet pipes (7), the liquid outlet ends of the plurality of second-level liquid inlet pipes (7) are respectively connected to the liquid inlets of a plurality of power modules (9) in a one-to-one correspondence, the liquid outlets of the plurality of power modules (9) are respectively connected to the liquid inlets of a plurality of second-level liquid outlet pipes (10) in a one-to-one correspondence, the liquid outlet ends of the plurality of second-level liquid outlet pipes (10) are connected to the liquid inlet end of the first-level liquid return pipe (6), and the liquid outlet ends of the plurality of second-level liquid outlet pipes (10) are respectively connected to the liquid inlet end of the first-level liquid return pipe (6). The liquid outlet end of the secondary liquid return pipe (6) is connected to the liquid return end of the liquid cooling unit (2); a control cabinet (4) is fixed in the charging cabinet (1), a control panel is arranged in the control cabinet (4), a pipeline switch (8) is arranged on each secondary liquid inlet pipe (7), the pipeline switch (8) can control the on and off of the secondary liquid inlet pipe (7), the pipeline switch (8) is electrically connected to the control panel, the power module (9) is electrically connected to the control panel, and the control panel controls the on and off of the pipeline switch (8) of the cooling branch where the power module (9) is located according to the on and off signals of the power module (9).

2. A charging stack power module thermal management device as claimed in claim 1, characterized in that: The power module (9) is an ACDC power module or a DCDC power module.

3. A charging stack power module thermal management device as claimed in claim 2, characterized in that: The power module (9) is provided with a liquid cooling channel, in which a liquid cooling medium can flow, and the liquid cooling channel is respectively connected to the liquid inlet and the liquid outlet.

4. A charging stack power module thermal management device as claimed in claim 3, characterized in that: The pipeline switch (8) is a solenoid valve, and the liquid cooling medium is cooling water or cooling oil.

5. A charging stack power module thermal management device as claimed in claim 3, characterized in that: The pipeline switch (8) is an electromagnetic coil, the liquid cooling medium is a magnetic fluid, and the magnetic field generated by the electromagnetic coil can control the flow of the magnetic fluid.

6. A charging stack power module thermal management device according to any one of claims 1 to 5, characterized in that: A water pump (3) is provided on the first-level liquid inlet pipe (5).

7. A charging stack power module thermal management device as claimed in claim 6, characterized in that: The water pump (3) is electrically connected to a control panel, and the control panel adjusts the rotation speed of the water pump (3) according to the number of power modules (9) turned on.

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