Energy storage charging pile thermal management system and method thereof

Abstract

The invention discloses an energy storage charging pile thermal management system which comprises an evaporator installed on a heat dissipation pipeline of a charging pile, and the outlet end of the evaporator is communicated with the inlet end of the heat dissipation pipeline of the charging pile; the condenser is installed on the heat dissipation pipeline of the charging pile, and the inlet end of the condenser communicates with the outlet end of the heat dissipation pipeline of the charging pile; the water pump is installed on a heat dissipation pipeline of the charging pile, the inlet end of the water pump communicates with the outlet end of the condenser, and the outlet end of the water pump communicates with the inlet end of the evaporator; the compressor is installed between the evaporator and the condenser through a connecting pipeline, the inlet end of the compressor is communicated with the outlet end of the condenser, and the outlet end of the compressor is communicated with the inlet end of the evaporator; the temperature of the outlet end of the heat dissipation pipeline of the charging pile is monitored, three optional modes of heating / refrigerating / self-circulation are achieved according to different temperature ranges, different cooling and heat dissipation modes can be selected according to the temperature of cooling liquid, and therefore effective heat exchange management is conducted on an energy storage system of the charging pile and liquid cooling power.

Description

Technical Field

[0001] The present invention relates to the technical field of charging pile thermal management, and in particular to a thermal management system and method for an energy storage charging pile. Background Art

[0002] With the rapid development of electric vehicles, the demand for the construction of charging piles has become increasingly significant. Compared with traditional charging piles, DC charging piles have the characteristics of high charging power and fast charging speed, but they are prone to cause internal power devices to heat up too quickly during operation, affecting the thermal safety of power devices. In addition, most existing charging pile cooling systems cool the charging pile system through heat pipes or natural air cooling, and the cooling capacity is very limited, and it is impossible to dissipate heat in local high heat generation areas in a timely and effective manner. For this reason, this application proposes a thermal management system for energy storage charging piles to solve the problem of heat dissipation in existing charging pile cooling systems. Summary of the invention

[0003] The embodiment of the present application provides a thermal management system for an energy storage charging pile. By monitoring the temperature at the outlet end of the heat dissipation pipe of the charging pile, three optional modes of heating / cooling / self-circulation are realized according to different temperature ranges. Different cooling and heat dissipation methods can be selected according to the temperature of the coolant, thereby effectively managing the heat exchange of the charging pile energy storage system and the liquid cooling power.

[0004] The embodiment of the present application provides a thermal management system for an energy storage charging pile, comprising:

[0005] The evaporator is installed on the heat dissipation pipe of the charging pile. The outlet of the evaporator is connected to the inlet of the heat dissipation pipe of the charging pile. A three-way valve is installed at the inlet of the evaporator. The ports of the three-way valve are divided into three ports: A, B, and C. The port B of the three-way valve is provided with a connecting pipe 1 which is connected to the outlet of the evaporator. The port C of the three-way valve is connected to the outlet of the water pump.

[0006] The condenser is installed on the heat dissipation pipe of the charging pile. The inlet end of the condenser is connected to the outlet end of the heat dissipation pipe of the charging pile. A three-way valve 2 is installed at the inlet end of the condenser. The ports of the three-way valve 2 are divided into three ports: E, F, and G. The port F of the three-way valve 2 is provided with a connecting pipe 2 connected to the outlet end of the condenser. The port G of the three-way valve 2 is connected to the outlet end of the condenser.

[0007] A water pump is installed on the heat dissipation pipe of the charging pile, the inlet end of the water pump is connected to the outlet end of the condenser, and the outlet end of the water pump is connected to the inlet end of the evaporator;

[0008] The compressor is installed between the evaporator and the condenser through a connecting pipe. The compressor inlet is connected to the condenser outlet, and the compressor outlet is connected to the evaporator inlet.

[0009] Furthermore, electromagnetic valves are installed at the three ports of the three-way valve one and the three ports of the three-way valve two.

[0010] Furthermore, a temperature sensor is installed at the outlet end of the charging pile heat dissipation pipe. The temperature sensor is electrically connected to the controller through a wire. The controller, as the main control unit, is electrically connected to the evaporator, condenser, water pump, compressor and solenoid valve through a wire. Through the temperature transmitted by the temperature sensor, the controller can choose to turn on different devices to achieve different cooling and heat dissipation.

[0011] Further, when the heat management system is used to dissipate heat during the working process of the charging pile according to the temperature of the coolant at the outlet end of the heat dissipation pipe of the charging pile, the specific cooling and heat dissipation process is as follows:

[0012] (1) Cooling mode: The temperature sensor detects that the temperature at the outlet of the charging pile heat dissipation pipe is greater than 36°C, and transmits its signal to the controller. The controller controls the compressor to work and controls the compressor speed according to the temperature. The three-way valve port B and the three-way valve port E are opened. The other three-way valve ports one and two are closed by default. The condenser is used for cooling to achieve the cooling effect.

[0013] (2) Heating mode: The temperature sensor detects that the temperature at the outlet of the charging pile heat dissipation pipe is less than 6°C, and transmits its signal to the controller. The controller controls the compressor to work and controls the compressor speed according to the temperature. At the same time, the three-way valve A port and the three-way valve F port are opened. The other three-way valves one and two ports are closed by default. The evaporator is used for heating to achieve the effect of heating and heating.

[0014] (3) Self-circulation mode: The temperature sensor detects that the temperature at the outlet of the charging pile heat dissipation pipe is greater than 6°C and less than 36°C, and transmits its signal to the controller. The controller controls the compressor to stop working and the water pump to work. At the same time, the three-way valve port B and the three-way valve port F are opened. The other three-way valve ports one and two are closed by default, and the water pump is used to push the coolant to circulate automatically.

[0015] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: the thermal management system of the present application monitors the temperature at the outlet end of the heat dissipation pipe of the charging pile, realizes three optional modes of heating / cooling / self-circulation according to different temperature ranges, and can select different cooling and heat dissipation methods according to the temperature of the coolant, thereby effectively managing the heat exchange of the charging pile energy storage system and the liquid cooling power. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the thermal management system structure of the energy storage charging pile in this application;

[0017] Figure 2 This is a schematic diagram of the installation structure of the three-way valve 1 and the three-way valve 2 of this application;

[0018] Figure 3This is the cooling and heat dissipation flow chart of the energy storage charging pile thermal management system for this application;

[0019] Figure 4 This is a schematic diagram of the temperature-speed changes of the compressor in this application.

[0020] In the figure: 10 charging pile heat dissipation pipe inlet, 20 charging pile heat dissipation pipe outlet, 30 compressor, 40 evaporator, 50 condenser, 60 water pump, 70 three-way valve one, 80 three-way valve two. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] Embodiment 1

[0025] See also Figure 1-4 , a thermal management system for an energy storage charging pile, comprising:

[0026] The evaporator 40 is installed on the heat dissipation pipe of the charging pile. The outlet of the evaporator is connected to the inlet 10 of the heat dissipation pipe of the charging pile. When the temperature of the cooling water outlet is less than 6°C, the evaporator 40 is used for heating to achieve the effect of heating and heating.

[0027] The condenser 50 is installed on the heat dissipation pipe of the charging pile. The inlet end of the condenser is connected to the outlet end 20 of the heat dissipation pipe of the charging pile. When the temperature of the cooling water outlet is higher than 36°C, the condenser 50 is used for cooling to achieve the effect of cooling and cooling.

[0028] The water pump 60 is installed on the heat dissipation pipe of the charging pile. The water pump inlet is connected to the condenser outlet, and the water pump outlet is connected to the evaporator inlet. When the temperature of the cooling water outlet is between 6°C and 36°C, the water pump 60 is used to push the coolant to perform cooling circulation by itself.

[0029] The compressor 30 is installed between the evaporator 40 and the condenser 50 through a connecting pipe. The compressor inlet is connected to the condenser outlet, and the compressor outlet is connected to the evaporator inlet. By compressing and transporting the refrigerant vapor, a low pressure is created in the evaporator 40 and a high pressure is created in the condenser 50, so that the refrigerant absorbs the heat of the cooled object in the evaporator 40 and releases the heat in the condenser 50. A throttle valve is installed on the connecting pipe.

[0030] A three-way valve 70 is installed at the inlet end of the evaporator. The ports of the three-way valve 70 are divided into three ports A, B and C. The port B of the three-way valve is provided with a connecting pipe 1 which is connected to the outlet end of the evaporator, and the port C of the three-way valve is connected to the outlet end of the water pump.

[0031] A three-way valve 80 is installed at the inlet end of the condenser. The ports of the three-way valve 80 are divided into three ports, E, F and G. The port F of the three-way valve is provided with a connecting pipe 2 which is connected to the outlet end of the condenser. The port G of the three-way valve is connected to the outlet end of the condenser.

[0032] Solenoid valves are installed at the three ports of the three-way valve 1 70 and the three ports of the three-way valve 2 80 .

[0033] A temperature sensor is installed at the outlet end 20 of the charging pile heat dissipation pipeline to monitor the temperature of the coolant. Different cooling and heat dissipation methods are selected according to the temperature of the coolant. The temperature sensor can be a thermocouple temperature sensor, a thermistor temperature sensor, or other sensor for measuring temperature.

[0034] The temperature sensor is electrically connected to a controller through a wire, which can be an industrial-grade microcontroller or PLC (programmable logic controller), etc. The controller serves as a main control unit, receives the temperature signal transmitted by the temperature sensor, and controls the opening and closing of other devices according to the set program logic to achieve different cooling and heat dissipation methods; the controller is electrically connected to the evaporator 40, the condenser 50, the water pump 60, the compressor 30 and the solenoid valve through a wire. Through the temperature transmitted by the temperature sensor, the controller can choose to open different devices to achieve different cooling and heat dissipation.

[0035] The controller can be used as a separate electrical component and connected in parallel to the charging pile control system to ensure the normal operation of the charging pile in the later stage.

[0036] The charging pile will generate heat during operation. Different components will be used in different charging working modes. For example, when ACDC1 works alone in the three-phase power grid, battery pack 1, ACDC1, and DCDC1 work at the same time. When battery pack 1 and DCDC1 work, the components will generate heat. Different working modes will generate different amounts of heat, which requires different cooling and heat dissipation methods.

[0037] When the heat management system is used to dissipate heat during the working process of the charging pile according to the temperature of the coolant at the outlet end 20 of the charging pile heat dissipation pipeline, the specific cooling and heat dissipation process is as follows:

[0038] (1) Refrigeration mode: The temperature sensor detects that the temperature at the outlet 20 of the charging pile heat dissipation pipe is greater than 36°C, and transmits its signal to the controller. The controller controls the compressor 30 to work and controls the speed of the compressor 30 according to the temperature. The three-way valve 1 B port and the three-way valve 2 E port are opened. The other three-way valves 1 and 2 ports are closed by default. The condenser 50 is used for refrigeration to achieve the effect of cooling and lowering the temperature.

[0039] (2) Heating mode: The temperature sensor detects that the temperature at the outlet 20 of the charging pile heat dissipation pipe is less than 6°C, and transmits its signal to the controller. The controller controls the compressor 30 to work and controls the speed of the compressor 30 according to the temperature. At the same time, the three-way valve A port and the three-way valve F port are opened. The other three-way valves 1 and 2 ports are closed by default. The evaporator 40 is used for heating to achieve the effect of heating and temperature increase.

[0040] (3) Self-circulation mode: The temperature sensor detects that the temperature at the outlet 20 of the charging pile heat dissipation pipe is greater than 6°C and less than 36°C, and transmits its signal to the controller. The controller controls the compressor 30 to stop working and the water pump 60 to work. At the same time, the three-way valve 1 port B and the three-way valve 2 port F are opened. The other three-way valves 1 and 2 ports are closed by default, and the water pump 60 is used to push the coolant to circulate automatically.

[0041] The technical solutions in the above-mentioned embodiments of the present application have at least the following technical effects or advantages: the thermal management system of the present application monitors the temperature at the outlet end of the heat dissipation pipe of the charging pile, realizes three optional modes of heating / cooling / self-circulation according to different temperature ranges, and can select different cooling and heat dissipation methods according to the temperature of the coolant, thereby effectively managing the heat exchange of the charging pile energy storage system and the liquid cooling power.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A thermal management system for an energy storage charging pile, characterized in that: include, The evaporator is installed on the heat dissipation pipe of the charging pile. The outlet of the evaporator is connected to the inlet of the heat dissipation pipe of the charging pile. A three-way valve is installed at the inlet of the evaporator. The ports of the three-way valve are divided into three ports: A, B, and C. The port B of the three-way valve is provided with a connecting pipe 1 which is connected to the outlet of the evaporator. The port C of the three-way valve is connected to the outlet of the water pump. The condenser is installed on the heat dissipation pipe of the charging pile. The inlet end of the condenser is connected to the outlet end of the heat dissipation pipe of the charging pile. A three-way valve 2 is installed at the inlet end of the condenser. The ports of the three-way valve 2 are divided into three ports: E, F, and G. The port F of the three-way valve 2 is provided with a connecting pipe 2 connected to the outlet end of the condenser. The port G of the three-way valve 2 is connected to the outlet end of the condenser. A water pump is installed on the heat dissipation pipe of the charging pile, the inlet end of the water pump is connected to the outlet end of the condenser, and the outlet end of the water pump is connected to the inlet end of the evaporator; The compressor is installed between the evaporator and the condenser through a connecting pipe. The compressor inlet is connected to the condenser outlet, and the compressor outlet is connected to the evaporator inlet.

2. The energy storage charging pile thermal management system according to claim 1, characterized in that: Solenoid valves are installed at the three ports of the three-way valve one and the three ports of the three-way valve two.

3. The energy storage charging pile thermal management system according to claim 1, characterized in that: A temperature sensor is installed at the outlet end of the charging pile heat dissipation pipe. The temperature sensor is electrically connected to the controller through a wire. The controller, as the main control unit, is electrically connected to the evaporator, condenser, water pump, compressor and solenoid valve through wires. Through the temperature transmitted by the temperature sensor, the controller can choose to turn on different devices to achieve different cooling and heat dissipation.

4. The energy storage charging pile thermal management system according to claim 1, characterized in that: When the thermal management system is used to dissipate heat during the working process of the charging pile according to the temperature of the coolant at the outlet of the charging pile heat dissipation pipeline, the specific cooling and heat dissipation process is as follows: (1) Cooling mode: The temperature sensor detects that the temperature at the outlet of the charging pile heat dissipation pipe is greater than 36°C, and transmits its signal to the controller. The controller controls the compressor to work and controls the compressor speed according to the temperature. The three-way valve port B and the three-way valve port E are opened. The other three-way valve ports one and two are closed by default. The condenser is used for cooling to achieve the cooling effect. (2) Heating mode: The temperature sensor detects that the temperature at the outlet of the charging pile heat dissipation pipe is less than 6°C, and transmits its signal to the controller. The controller controls the compressor to work and controls the compressor speed according to the temperature. At the same time, the three-way valve A port and the three-way valve F port are opened. The other three-way valves one and two ports are closed by default. The evaporator is used for heating to achieve the effect of heating and heating. (3) Self-circulation mode: The temperature sensor detects that the temperature at the outlet of the charging pile heat dissipation pipe is greater than 6°C and less than 36°C, and transmits its signal to the controller. The controller controls the compressor to stop working and the water pump to work. At the same time, the three-way valve port B and the three-way valve port F are opened. The other three-way valve ports one and two are closed by default, and the water pump is used to push the coolant to circulate automatically.

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