Cold storage type multi-channel full liquid cooling charging device and control strategy

Abstract

The invention discloses a cold accumulation type multi-channel full liquid cooling charging device and a control strategy, and relates to the technical field of electronic equipment manufacturing. Comprising a liquid storage tank 1 and a liquid storage tank 2, the liquid storage tank 11 is connected with at least two charging terminal cooling loops, the liquid storage tank 2 is connected with at least three power component cooling loops, and each loop drives cooling liquid to circularly dissipate heat through a water pump; the heat exchange loop is composed of a refrigeration driving module and a heat exchange module, and efficient heat transmission is achieved. The device is excellent in heat dissipation performance, the heat dissipation performance is 10-20 DEG C lower than that of air cooling, the heat dissipation performance is 10-30 DEG C lower than that of common liquid cooling, and the device is suitable for a system with the power Large-current fast charging is supported, and the charging time is shortened by 20%-30%; the energy consumption is reduced through time-sharing and zone-partitioning control; due to the full-liquid-cooling sealing design, the protection grade reaches IP65, the noise is low, and the failure rate is low; the maintenance frequency is reduced, the service life is prolonged, the cost is remarkably reduced, and the high-power charging requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle charging, and in particular to a cold storage type multi-channel full liquid cooling charging device and a control strategy. Background Art

[0002] At present, in order to meet the rapidly growing demand for charging of new energy vehicles, the market for charging piles is also growing rapidly, both AC charging piles and DC charging piles are growing rapidly. At the same time, due to the breakthrough of new energy vehicle battery technology, the mileage is constantly increasing, the battery capacity is constantly increasing, the charging speed needs to be faster, the charging current is getting larger and larger, and the heat dissipation demand of the charger equipment is getting stronger and stronger.

[0003] At present, the main heat dissipation methods of charging piles are: natural cooling, air cooling and ordinary liquid cooling. Natural cooling does not add any auxiliary equipment and has no temperature control capability. It cannot meet the heat dissipation requirements of existing chargers and equipment, and there is a risk of overheating. Air cooling technology relies on air cooling modules and natural cooling gun wires to reduce the temperature through heat exchange with air. However, in the face of high heat generation caused by high-current fast charging, if the air cooling method continues to be used, thicker copper wires must be used to increase the heat dissipation area. This will not only increase the manufacturing cost, but also increase the weight of the charging gun wire, which is not only inconvenient to use, but may also bring safety hazards due to excessive weight. In addition, a significant limitation of the air cooling method is that it cannot directly cool the core of the cable effectively. Ordinary liquid cooling technology can effectively improve the heat dissipation capacity. It combines a liquid cooling module with a liquid cooling gun wire. Through the coolant such as ethylene glycol, oil, etc. flowing through the liquid cooling cable, the heat generated by the cable is directly taken away. This method improves the heat dissipation efficiency, can achieve a small cross-section cable to carry a large current and maintain a low temperature rise, and improves the safety of charging. As the cable diameter is thinner, the weight is also reduced, which makes it easier to use and reduces the safety risks caused by excessive weight. Since ordinary liquid cooling systems do not have rotating parts such as fans, the noise is also lower, which improves the user experience. It has driven the development of liquid cooling systems for chargers, but with the development of battery technology, especially the development of new technologies such as solid-state batteries and graphene batteries, the energy density of batteries is constantly increasing, and the overall heat dissipation capacity is limited by the coolant temperature. Ordinary liquid cooling solutions cannot meet the heat dissipation needs of higher-power charging. The charging market needs a heat dissipation technology with better heat dissipation performance and more energy saving than ordinary liquid cooling solutions. Summary of the invention

[0004] In order to solve the problem that it is inconvenient to wind the electronic wiring harness with a binding tape, the present invention provides a fully liquid-cooled charger device and a control strategy with cold storage multi-channel heat dissipation to solve the problems of insufficient heat dissipation capacity, poor protection, high noise, short service life, high operating and maintenance costs, and high investment costs of existing charging heat dissipation methods in related technologies.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A cold energy storage type multi-channel all-liquid-cooled charging device includes a liquid storage tank 1 and a liquid storage tank 2. The liquid storage tank 1 is used to store low-temperature coolant and is connected to at least two charging terminal cooling circuits; the liquid storage tank 2 is used to store low-temperature coolant and is connected to at least three power component cooling circuits;

[0006] The charging terminal cooling circuit includes a first charging terminal cooling circuit, which is composed of a charging gun 1, a charging cable 1, a common charging pile 1 and a water pump 1; and a second charging terminal cooling circuit, which is composed of a charging gun 2, a charging cable 2, a common charging pile 2 and a water pump 2. The water pumps in each charging terminal cooling circuit drive the coolant in the liquid storage tank 1 to circulate to absorb the heat generated by the corresponding charging terminal;

[0007] The power component cooling circuit includes a power module cooling circuit, which is composed of a power module and a water pump 4; a power distribution module cooling circuit, which is composed of a power distribution module and a water pump 6; a distribution unit cooling circuit, which is composed of a distribution unit and a water pump 7. The water pumps in each power component cooling circuit drive the coolant in the liquid storage tank 2 to circulate to absorb the heat generated by the corresponding power component;

[0008] A heat exchange circuit, which is composed of a refrigeration drive module, a heat exchange module, a heat exchange fan, an expansion valve, a refrigeration side of the heat exchanger and a water tank side of the heat exchanger. Among them, heat exchange occurs between the refrigeration side of the heat exchanger and the water tank side of the heat exchanger. The refrigerant undergoes compression, condensation, expansion and evaporation processes in this heat exchange circuit to transfer the heat of the water tank side of the heat exchanger to the heat exchange module and then be discharged by the heat exchange fan;

[0009] The liquid storage tank 1 is connected to the water tank side of the heat exchanger through a water pump 3, and the liquid storage tank 2 is connected to the water tank side of the heat exchanger through a water pump 5 to form a coolant circulation circuit;

[0010] The liquid storage tank 1 and the liquid storage tank 2 are respectively connected to the water tank side of the heat exchanger through a water pump 3 and a water pump 5 to form a coolant circulation circuit.

[0011] Preferably, it further includes a control system. The control system includes: a wire group thermal management module 1, which is connected to the temperature sensors of the charging gun 1, the charging cable 1 and the common charging pile 1 in the first charging terminal cooling circuit, and is used to collect the temperature data of each component in the first charging terminal cooling circuit and control the start and stop of the water pump 1;

[0012] A gun wire group thermal management module 2, which is connected to the temperature sensors of the charging gun 2, the charging cable 2 and the common charging pile 2 in the second charging terminal cooling circuit, and is used to collect the temperature data of each component in the second charging terminal cooling circuit and control the start and stop of the water pump 2;

[0013] The power group thermal management module is connected to the power module temperature sensor, the power distribution module temperature sensor, and the distribution unit temperature sensor, and is used to collect the temperature data of each power component and respectively control the start and stop of water pumps 4, 6, and 7;

[0014] The thermal management main control module is connected to the liquid storage tank 1 temperature sensor, the liquid storage tank 2 temperature sensor, the heat exchanger water tank side temperature sensor, the heat exchange module temperature sensor, and the heat exchanger refrigeration side temperature sensor, and is used to collect the temperature data of the above components and control the operation of water pumps 3, 5, the refrigeration drive module, the heat exchange fan, and the expansion valve;

[0015] The wire group thermal management module 1, the gun wire group thermal management module 2, the power group thermal management module, and the thermal management main control module are connected through communication lines to form a master-slave communication system, which is uniformly coordinated and controlled by the thermal management main control module.

[0016] A multi-channel liquid cooling heat dissipation control strategy based on the device described in any one of claims 1-2, comprising the following steps:

[0017] S1. Charging terminal heat dissipation control: When the temperature detected by the charging gun 1 temperature sensor, the charging cable 1 temperature sensor, or the ordinary charging pile 1 temperature sensor in the first charging terminal cooling circuit ≥ 70°C, the wire group thermal management module 1 starts water pump 1; when the detected temperature ≤ 25°C, water pump 1 stops working, and if in a non-charging state, the system shuts down; when the temperature detected by the charging gun 2 temperature sensor, the charging cable 2 temperature sensor, or the ordinary charging pile 2 temperature sensor in the second charging terminal cooling circuit ≥ 70°C, the gun wire group thermal management module 2 starts water pump 2; when the detected temperature ≤ 25°C, water pump 2 stops working, and if in a non-charging state, the system shuts down;

[0018] S2. Power component heat dissipation control: When the power module temperature sensor detects that the temperature of the power module ≥ 70°C, the power group thermal management module starts water pump 4; when the power distribution module temperature sensor detects that the temperature of the power distribution module ≥ 70°C, the power group thermal management module starts water pump 6; when the distribution unit temperature sensor detects that the temperature of the distribution unit ≥ 70°C, the power group thermal management module starts water pump 7; when the temperature of the corresponding power component ≤ 25°C, the corresponding water pump stops working, and if in a non-charging state, the system shuts down;

[0019] S3. Liquid storage tank temperature regulation: When the liquid storage tank 1 temperature sensor detects that the temperature of the liquid storage tank 1 ≥ 50°C, the thermal management main control module starts water pump 3 to convey the coolant in the liquid storage tank 1 to the heat exchanger water tank side; when the liquid storage tank 2 temperature sensor detects that the temperature of the liquid storage tank 2 ≥ 50°C, the thermal management main control module starts water pump 5 to convey the coolant in the liquid storage tank 2 to the heat exchanger water tank side;

[0020] S4. Start and stop of the refrigeration circuit: When the temperature sensor on the water tank side of the heat exchanger detects that the temperature on the water tank side of the heat exchanger ≥ 50°C, the thermal management main control module starts the refrigeration drive module, the expansion valve, and the heat exchange fan; when the temperature detected by the temperature sensor on the water tank side of the heat exchanger ≤ 5°C, the thermal management main control module shuts down the refrigeration drive module, the expansion valve, and the heat exchange fan.

[0021] Preferably, both the liquid storage tank 1 and the liquid storage tank 2 are sealed containers, and the coolant stored inside is ethylene glycol or oil-based coolant. Moreover, the liquid storage tank 1 is provided with an expandable interface for increasing the number of cooling circuits for the charging terminal.

[0022] Preferably, the thermal management main control module communicates with the line group thermal management module 1, the gun line group thermal management module 2, and the power group thermal management module through the CAN bus or Ethernet to synchronize the temperature data and control instructions of each component in real time.

[0023] Preferably, the circulation of the coolant in each cooling circuit adopts a time-sharing and zone-control method. The water pumps in each circuit operate independently and are only started when the temperature of the corresponding component exceeds the set threshold. Moreover, the temperature control range of the coolant in the liquid storage tank 1 and the liquid storage tank 2 is 5°C - 50°C.

[0024] Preferably, after the refrigeration circuit is started, the thermal management main control module adjusts the opening degree of the expansion valve and the power of the refrigeration drive module according to the temperature difference detected by the temperature sensor on the refrigeration side of the heat exchanger and the temperature sensor of the heat exchange module through the proportional-integral-derivative algorithm to achieve precise control of the coolant temperature.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. Excellent heat dissipation performance, suitable for high-power scenarios: Adopting a dual-liquid storage tank and multi-channel liquid cooling design, the charging terminal, charging gun, cable, charging pile, and power components, power module, power distribution module, and distribution unit are precisely cooled through independent cooling circuits. Combining with the efficient heat exchange of the refrigeration drive module and the heat exchanger, the temperature of the charging system is reduced by 10~20°C compared with the traditional air-cooled solution and by 10~30°C compared with the ordinary liquid-cooled solution. It can stably support the large-current fast charging requirements of a charger system above 480kW and avoid charging interruption or equipment damage caused by overheating.

[0027] 2. Improve charging efficiency and optimize the user experience: The efficient heat dissipation ability allows a higher charging current to pass through, significantly shortening the charging time. The charging time is shorter than that of the traditional solution. Combining with the intelligent control strategy to adjust the heat dissipation power in real time, it ensures a stable and efficient charging process and greatly improves the user's fast charging experience.

[0028] 3. Intelligent energy saving, dynamically adapting to heat dissipation requirements: The time-sharing and zone control of the coolant circulation is realized through the "one master and multiple slaves" control system. The water pumps of each loop are only started when the temperature of the corresponding component exceeds the threshold, such as ≥70°C. The liquid storage tank is linked with the refrigeration system for adjustment. For example, heat exchange is started when the temperature of the liquid storage tank ≥50°C, avoiding ineffective energy consumption. Through actual measurement, the energy consumption of the system is reduced compared with the traditional liquid cooling solution, significantly improving the energy utilization efficiency.

[0029] 4. High protection level, adapting to harsh environments: The fully liquid-cooled sealed design, with the liquid storage tank and coolant pipelines being sealed structures, enables the device to reach a protection level of IP65 or above, effectively resisting the intrusion of dust, rainwater and moisture. Combined with the design of low mechanical components without fans, the failure risk caused by environmental factors is greatly reduced. The failure rate is reduced by 60% compared with traditional air-cooled equipment, and it can be stably applied to harsh scenarios such as outdoor ultra-fast charging stations, high-cold and high-heat regions.

[0030] 5. Low-noise operation, enhancing the usage experience: Compared with the air-cooled solution that relies on forced air cooling by fans, the liquid cooling system of the present invention only starts the heat exchange fan at high temperatures, and there are no mechanical vibration components in the liquid cooling loop. The operating noise ≤50dB, which is reduced by more than 30% compared with the air-cooled solution, creating a quiet charging environment.

[0031] 6. Long service life and low maintenance, reducing the total cost: The efficient heat dissipation and high-reliability design reduce the thermal aging loss of components. The coolant circulation loop of the liquid storage tank adopts corrosion-resistant materials. Combined with the intelligent fault diagnosis and automatic start-stop strategy, the equipment maintenance frequency is reduced compared with the traditional solution, the service life is extended, and the full-cycle operation cost is significantly reduced. Description of the Drawings

[0032] The drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0033] Figure 1 It is a schematic diagram of the cold storage type multi-channel full liquid-cooled charging system of the present invention;

[0034] Figure 2 It is a schematic diagram of the cold storage type multi-channel full liquid-cooled charging control system of the present invention;

[0035] Figure 3 It is the charging terminal temperature control strategy of the present invention;

[0036] Figure 4 It is the liquid storage tank temperature control strategy of the present invention;

[0037] Figure 5 It is the heat dissipation system control strategy of the present invention;

[0038] Figure 6Schematic diagram for controlling the digital reference circuit of the present invention. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0040] Embodiment: Referring to FIGS. 1-5, a cold energy storage type multi-channel all-liquid-cooled charging device, characterized in that: it includes a liquid storage tank 1 and a liquid storage tank 2. The liquid storage tank 1 is used to store low-temperature coolant and is connected to at least two charging terminal cooling circuits; the liquid storage tank 2 is used to store low-temperature coolant and is connected to at least three power component cooling circuits;

[0041] The charging terminal cooling circuit includes a first charging terminal cooling circuit, which is composed of a charging gun 1, a charging cable 1, an ordinary charging pile 1, and a water pump 1; and a second charging terminal cooling circuit, which is composed of a charging gun 2, a charging cable 2, an ordinary charging pile 2, and a water pump 2; the water pumps in each charging terminal cooling circuit drive the coolant in the liquid storage tank 1 to circulate to absorb the heat generated by the corresponding charging terminal. The power component cooling circuit includes a power module cooling circuit, which is composed of a power module and a water pump 4; a power distribution module cooling circuit, which is composed of a power distribution module and a water pump 6; a distribution unit cooling circuit, which is composed of a distribution unit and a water pump 7; the water pumps in each power component cooling circuit drive the coolant in the liquid storage tank 2 to circulate to absorb the heat generated by the corresponding power component. The heat exchange circuit is composed of a refrigeration drive module, a heat exchange module, a heat exchange fan, an expansion valve, a refrigerant side of the heat exchanger, and a water tank side of the heat exchanger; wherein, heat exchange occurs between the refrigerant side of the heat exchanger and the water tank side of the heat exchanger, and the refrigerant undergoes compression, condensation, expansion, and evaporation processes in this heat exchange circuit to transfer the heat of the water tank side of the heat exchanger to the heat exchange module, and then it is discharged by the heat exchange fan. The liquid storage tank 1 is connected to the water tank side of the heat exchanger through a water pump 3, and the liquid storage tank 2 is connected to the water tank side of the heat exchanger through a water pump 5 to form a coolant circulation circuit. The liquid storage tank 1 and the liquid storage tank 2 are respectively connected to the water tank side of the heat exchanger through the water pump 3 and the water pump 5 to form a coolant circulation circuit.

[0042] In terms of the charging circuit components, there are a charging gun 1, a charging cable 1, and an ordinary charging pile 1, which are connected to the water pump 1 and the liquid storage tank 1 to form a first charging terminal cooling circuit; the charging gun 2, the charging cable 2, and the ordinary charging pile 2 are connected to the water pump 2 and the liquid storage tank 1 to form a second charging terminal cooling circuit. The power module and the water pump 4 and the liquid storage tank 2 form a power module cooling circuit; the power distribution module and the water pump 6 and the liquid storage tank 2 form a power distribution module cooling circuit; the distribution unit and the water pump 7 and the liquid storage tank 2 form a distribution unit cooling circuit.

[0043] The components of the heat exchange system include a refrigeration drive module, a heat exchange module, a heat exchange fan, an expansion valve, the refrigeration side of the heat exchanger, and the water tank side of the heat exchanger. Among them, the refrigeration side of the heat exchanger and the water tank side of the heat exchanger are closely matched, and the refrigerant circulates in the heat exchange loop composed of these components to achieve heat transfer.

[0044] The components of the control system include many sensors and control modules such as the heat management module 1 of the gun line group, the temperature sensor of charging gun 1, the temperature sensor of charging cable 1, and the temperature sensor of ordinary charging pile 1. Each temperature sensor monitors the temperature of the corresponding component, and the heat management module controls the operation of devices such as water pumps and refrigeration drive modules according to the temperature data.

[0045] In the present invention, the connection relationships of the components are close and orderly. The liquid storage tank 1 and the liquid storage tank 2 respectively form a coolant circulation loop with the water tank side of the heat exchanger through the water pump 3 and the water pump 5 to adjust the temperature of the coolant in the liquid storage tank. The heat management module 1 of the gun line group collects the real-time temperatures detected by the temperature sensor of charging gun 1, the temperature sensor of charging cable 1, and the temperature sensor of ordinary charging pile 1, and controls the operation of the water pump 1; the heat management module 2 of the gun line group collects the real-time temperatures detected by the temperature sensor of charging gun 2, the temperature sensor of charging cable 2, and the temperature sensor of ordinary charging pile 2, and controls the operation of the water pump 2; the heat management module of the power group collects the real-time temperatures detected by the temperature sensor of the power module, the temperature sensor of the power distribution module, and the temperature sensor of the distribution unit, and controls the operation of the water pump 4, the water pump 6, and the water pump 7 respectively; the main heat management module collects the real-time temperatures of the temperature sensor of the liquid storage tank 1, the temperature sensor of the water tank side of the heat exchanger, the temperature sensor of the liquid storage tank 2, the temperature sensor of the heat exchange module, and the temperature sensor of the refrigeration side of the heat exchanger, and controls the operation of the water pump 3, the water pump 5, the refrigeration drive module, the heat exchange fan, and the expansion valve respectively. The heat management module 1 of the gun line group, the heat management module 2 of the gun line group, the heat management module of the power group, and the main heat management module constitute a control and communication system, which is uniformly coordinated and controlled by the main heat management module.

[0046] In actual use scenarios, for example, in a 480kW charger system:

[0047] First, during the system installation stage, install each component according to the design requirements. Carefully connect the charging gun, charging cable, charging pile to the corresponding liquid storage tank and water pump to ensure that the coolant pipeline is well sealed and there is no risk of leakage; install the components of the heat exchange system to ensure the normal operation of the refrigerant circulation loop; connect each temperature sensor and control module to ensure stable signal transmission. After the installation is completed, conduct a comprehensive inspection of the entire system to test whether each component can operate normally and whether the temperature sensor can accurately measure the temperature.

[0048] Next, during the charging process, after the system starts up, each water pump, refrigeration circuit, etc. enter the standby state. When the gun line group thermal management module 1 detects that the temperature of any one of the charging gun 1 temperature sensor, charging cable 1 temperature sensor, and ordinary charging pile 1 temperature sensor is greater than or equal to 70°C, water pump 1 starts to work, driving the coolant to circulate in the first charging terminal cooling circuit to take away heat. Similarly, when the gun line group thermal management module 2 detects that the relevant temperature is greater than or equal to 70°C, water pump 2 starts to work. When the power group thermal management module detects that the temperature of any one of the power module temperature sensor, power distribution module temperature sensor, and distribution unit temperature sensor is greater than or equal to 70°C, the corresponding water pumps 4, 6, and 7 start to work. When the thermal management main control module detects that the temperature of the liquid storage tank 1 temperature sensor or the liquid storage tank 2 temperature sensor is greater than or equal to 50°C, water pump 3 or water pump 5 starts to work to adjust the temperature of the coolant in the liquid storage tank. When the thermal management main control module detects that the temperature of the heat exchanger water tank side temperature sensor is greater than or equal to 50°C, the refrigeration circuit composed of the refrigeration drive module, heat exchange module, expansion valve, and refrigeration side of the heat exchanger starts to work, and the heat exchange fan also starts to work to cool down the coolant.

[0049] After the charging is completed, the system stops the charging operation. At this time, devices such as each water pump and refrigeration circuit gradually stop working according to the detection results of the temperature sensors. Check whether the temperature of each component has returned to the normal range, and check whether there is any leakage of the coolant and whether there is abnormal wear of the equipment. If problems are found, repair and maintenance should be carried out in a timely manner to ensure that the equipment can operate normally next time. Through such an implementation method, the charging device can effectively reduce the temperature of the charging system, improve the charging efficiency, and adapt to different heat dissipation requirements, showing good energy-saving effects, high protection levels, and low noise levels. The equipment has a low maintenance frequency and a long service life.

[0050] Working principle: In this embodiment, the present invention also proposes a cold energy storage type multi-channel all-liquid-cooled charging device and control strategy, including the following steps:

[0051] Step 1, charging terminal heat dissipation control: When the temperature detected by the charging gun 1 temperature sensor, charging cable 1 temperature sensor, or ordinary charging pile 1 temperature sensor in the first charging terminal cooling circuit is ≥70°C, the line group thermal management module 1 starts water pump 1; when the detected temperature ≤25°C, water pump 1 stops working, and if it is in a non-charging state, the system shuts down; when the temperature detected by the charging gun 2 temperature sensor, charging cable 2 temperature sensor, or ordinary charging pile 2 temperature sensor in the second charging terminal cooling circuit is ≥70°C, the gun line group thermal management module 2 starts water pump 2; when the detected temperature ≤25°C, water pump 2 stops working, and if it is in a non-charging state, the system shuts down;

[0052] Step 2, Heat Dissipation Control of Power Components: When the temperature sensor of the power module detects that the temperature of the power module ≥ 70°C, the power group thermal management module starts water pump 4; when the temperature sensor of the power distribution module detects that the temperature of the power distribution module ≥ 70°C, the power group thermal management module starts water pump 6; when the temperature sensor of the distribution unit detects that the temperature of the distribution unit ≥ 70°C, the power group thermal management module starts water pump 7; when the temperature of the corresponding power component ≤ 25°C, the corresponding water pump stops working, and if it is in a non-charging state, the system shuts down;

[0053] Step 3, Temperature Regulation of the Liquid Storage Tank: When the temperature sensor of liquid storage tank 1 detects that the temperature of liquid storage tank 1 ≥ 50°C, the thermal management main control module starts water pump 3 to convey the coolant in liquid storage tank 1 to the water tank side of the heat exchanger; when the temperature sensor of liquid storage tank 2 detects that the temperature of liquid storage tank 2 ≥ 50°C, the thermal management main control module starts water pump 5 to convey the coolant in liquid storage tank 2 to the water tank side of the heat exchanger;

[0054] Step 4, Start and Stop of the Refrigeration Circuit: When the temperature sensor of the water tank side of the heat exchanger detects that the temperature of the water tank side of the heat exchanger ≥ 50°C, the thermal management main control module starts the refrigeration drive module, the expansion valve, and the heat exchange fan; when the temperature detected by the temperature sensor of the water tank side of the heat exchanger ≤ 5°C, the thermal management main control module shuts down the refrigeration drive module, the expansion valve, and the heat exchange fan.

[0055] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A cold energy storage type multi-channel all-liquid-cooled charging device, characterized in that: It includes a liquid storage tank 1 and a liquid storage tank 2. The liquid storage tank 1 is used to store low-temperature coolant and is connected to at least two charging terminal cooling circuits; the liquid storage tank 2 is used to store low-temperature coolant and is connected to at least three power component cooling circuits. The charging terminal cooling circuits include a first charging terminal cooling circuit, which consists of a charging gun 1, a charging cable 1, a common charging pile 1 and a water pump 1; and a second charging terminal cooling circuit, which consists of a charging gun 2, a charging cable 2, a common charging pile 2 and a water pump 2. The water pumps in each charging terminal cooling circuit drive the coolant in the liquid storage tank 1 to circulate to absorb the heat generated by the corresponding charging terminal. The power component cooling circuits include a power module cooling circuit, which consists of a power module and a water pump 4; a power distribution module cooling circuit, which consists of a power distribution module and a water pump 6; and a distribution unit cooling circuit, which consists of a distribution unit and a water pump 7. The water pumps in each power component cooling circuit drive the coolant in the liquid storage tank 2 to circulate to absorb the heat generated by the corresponding power component. The heat exchange circuit consists of a refrigeration drive module, a heat exchange module, a heat exchange fan, an expansion valve, a refrigeration side of the heat exchanger and a water tank side of the heat exchanger. Among them, heat exchange occurs between the refrigeration side of the heat exchanger and the water tank side of the heat exchanger. The refrigerant undergoes compression, condensation, expansion and evaporation processes in this heat exchange circuit to transfer the heat on the water tank side of the heat exchanger to the heat exchange module and then be discharged by the heat exchange fan. The liquid storage tank 1 is connected to the water tank side of the heat exchanger through a water pump 3, and the liquid storage tank 2 is connected to the water tank side of the heat exchanger through a water pump 5 to form a coolant circulation circuit. The liquid storage tank 1 and the liquid storage tank 2 are respectively connected to the water tank side of the heat exchanger through the water pump 3 and the water pump 5 to form a coolant circulation circuit.

2. The liquid-cooled charging device with cold storage and multi-channels according to claim 1, wherein: It further includes a control system. The control system includes: a line group thermal management module 1, which is connected to the temperature sensors of the charging gun 1, the charging cable 1 and the common charging pile 1 in the first charging terminal cooling circuit, and is used to collect the temperature data of each component in the first charging terminal cooling circuit and control the start and stop of the water pump 1; a gun line group thermal management module 2, which is connected to the temperature sensors of the charging gun 2, the charging cable 2 and the common charging pile 2 in the second charging terminal cooling circuit, and is used to collect the temperature data of each component in the second charging terminal cooling circuit and control the start and stop of the water pump 2; a power group thermal management module, which is connected to the power module temperature sensor, the power distribution module temperature sensor and the distribution unit temperature sensor, and is used to collect the temperature data of each power component and respectively control the start and stop of the water pump 4, the water pump 6 and the water pump 7; a thermal management main control module, which is connected to the temperature sensors of the liquid storage tank 1, the liquid storage tank 2, the water tank side of the heat exchanger, the heat exchange module and the refrigeration side of the heat exchanger, and is used to collect the temperature data of the above-mentioned components and control the operation of the water pump 3, the water pump 5, the refrigeration drive module, the heat exchange fan and the expansion valve. The line group thermal management module 1, the gun line group thermal management module 2, the power group thermal management module and the thermal management main control module are connected through communication lines to form a master-slave communication system, which is uniformly coordinated and controlled by the thermal management main control module.

3. A multi-channel liquid cooling heat dissipation control strategy based on the device according to any one of claims 1-2, characterized in that, The steps include: S1. Cooling control of the charging terminal: When the temperature detected by the charging gun 1 temperature sensor, the charging cable 1 temperature sensor or the ordinary charging pile 1 temperature sensor in the first charging terminal cooling circuit is ≥70°C, the line group thermal management module 1 starts the water pump 1; when the detected temperature ≤25°C, the water pump 1 stops working. If it is in a non-charging state, the system shuts down; when the temperature detected by the charging gun 2 temperature sensor, the charging cable 2 temperature sensor or the ordinary charging pile 2 temperature sensor in the second charging terminal cooling circuit is ≥70°C, the gun line group thermal management module 2 starts the water pump 2; when the detected temperature ≤25°C, the water pump 2 stops working. If it is in a non-charging state, the system shuts down; S2. Cooling control of power components: When the power module temperature sensor detects that the temperature of the power module is ≥70°C, the power group thermal management module starts the water pump 4; when the power distribution module temperature sensor detects that the temperature of the power distribution module is ≥70°C, the power group thermal management module starts the water pump 6; when the distribution unit temperature sensor detects that the temperature of the distribution unit is ≥70°C, the power group thermal management module starts the water pump 7; when the temperature of the corresponding power component ≤25°C, the corresponding water pump stops working. If it is in a non-charging state, the system shuts down; S3. Temperature adjustment of the liquid storage tank: When the liquid storage tank 1 temperature sensor detects that the temperature of the liquid storage tank 1 is ≥50°C, the thermal management main control module starts the water pump 3 to transport the coolant in the liquid storage tank 1 to the water tank side of the heat exchanger; when the liquid storage tank 2 temperature sensor detects that the temperature of the liquid storage tank 2 is ≥50°C, the thermal management main control module starts the water pump 5 to transport the coolant in the liquid storage tank 2 to the water tank side of the heat exchanger; S4. Start and stop of the refrigeration circuit: When the heat exchanger water tank side temperature sensor detects that the temperature of the heat exchanger water tank side is ≥50°C, the thermal management main control module starts the refrigeration drive module, the expansion valve and the heat exchange fan; when the temperature detected by the heat exchanger water tank side temperature sensor is ≤5°C, the thermal management main control module shuts down the refrigeration drive module, the expansion valve and the heat exchange fan.

4. The cold storage type multi-channel all-liquid-cooling charging device according to claim 1, wherein: Both the liquid storage tank 1 and the liquid storage tank 2 are sealed containers, and the coolant stored inside is ethylene glycol or oil-based coolant. The liquid storage tank 1 is provided with an expandable interface for increasing the number of charging terminal cooling circuits.

5. The cold storage type multi-channel all-liquid-cooling charging device according to claim 2, characterized in that: The thermal management main control module communicates with the line group thermal management module 1, the gun line group thermal management module 2, and the power group thermal management module through the CAN bus or Ethernet to synchronize the temperature data and control instructions of each component in real time.

6. The multi-channel liquid cooling heat dissipation control strategy according to claim 3, wherein: The circulation of the coolant in each cooling circuit adopts a time-sharing and zoning control method. The water pumps in each circuit operate independently and are only started when the temperature of the corresponding component exceeds the set threshold. The temperature control range of the coolant in the liquid storage tank 1 and the liquid storage tank 2 in each circuit is 5°C - 50°C.

7. The multi-channel liquid cooling heat dissipation control strategy according to claim 3, characterized in that: After the refrigeration circuit is started, the thermal management master control module adjusts the opening of the expansion valve and the power of the refrigeration drive module through the proportional integral derivative algorithm according to the temperature difference detected by the temperature sensor on the refrigeration side of the heat exchanger and the temperature sensor of the heat exchange module, so as to achieve precise control of the coolant temperature.

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