Power supply energy-saving temperature control method, charging pile system, control device and storage medium

Abstract

The invention discloses a power supply energy-saving temperature control method, a charging pile system, a control device and a storage medium, and the method comprises the steps: obtaining the energy storage temperature of an energy storage power module of each charging pile device, and controlling a bidirectional pump corresponding to each charging pile device to execute an energy storage temperature adjustment step; refrigerant liquid level information of at least one of the first storage cavity and the second storage cavity is obtained, and the heat exchange device is controlled to operate according to the refrigerant liquid level information so as to exchange refrigerants between the first storage cavity and the second storage cavity; the first refrigerant temperature of the first storage cavity is obtained, and when the first refrigerant temperature is lower than a first refrigerant temperature threshold value, the heat exchange device is controlled to operate so as to heat a refrigerant in the first storage cavity; a second refrigerant temperature of the second storage cavity is obtained, and when the second refrigerant temperature is higher than a second refrigerant temperature threshold value, the heat exchange device is controlled to operate so as to refrigerate a refrigerant in the second storage cavity; according to the design, the temperature of the energy storage power supply module of each charging pile device is reasonably controlled, and the energy consumption and the operation cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of new energy charging equipment technology, and in particular to a power supply energy-saving temperature control method and a charging pile system, control device, and storage medium. Background Technology

[0002] New energy vehicles are gradually gaining popularity among users, and charging pile systems are being built in various areas of cities to provide charging for these vehicles. However, urban electricity consumption varies between peak and off-peak hours. Therefore, existing charging pile systems will install energy storage modules inside the charging piles. During off-peak hours, the mains power can charge the energy storage modules, and during peak hours, when the charging pile needs to charge a car, it can prioritize using the energy from the energy storage modules.

[0003] Because charging piles are equipped with energy storage modules, which include energy storage units and power modulation units, the power modulation units are connected to the energy storage units to charge and discharge them. Both charging and discharging processes generate heat. Overheating can affect the lifespan of the energy storage modules and may even pose safety risks. Similarly, in northern cities where the ambient temperature is low and no charging or discharging is in progress, the temperature of the energy storage modules can drop. When the temperature is too low, charging or discharging will affect the charging and discharging efficiency and lifespan. Therefore, existing charging pile systems equip each charging pile with a heat exchanger. This heat exchanger constantly regulates the temperature of the energy storage modules to maintain them within a suitable charging and discharging temperature range, ensuring operational quality and lifespan. However, the operation of the heat exchanger also consumes electricity, leading to significant energy consumption and high operating costs over long periods. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a power-saving temperature control method and a charging pile system, control device, and storage medium to reasonably control the temperature of the energy storage power module of each charging pile device, thereby reducing energy consumption and operating costs.

[0005] According to a first aspect of the present invention, a power-saving temperature control method is applied to a charging pile system. The charging pile system includes multiple charging pile devices, a heat exchange device, and a control module. Each charging pile device includes an energy storage power module. A heat exchange tube and a bidirectional pump disposed within the heat exchange tube are arranged around the energy storage power module. The energy storage power module and the heat exchange tube can transfer heat to each other. The heat exchange device includes a first storage cavity, a second storage cavity, and a bypass heat exchange module. The first storage cavity is connected to the first end of the heat exchange tube of each charging pile device, and the second storage cavity is connected to the tail end of the heat exchange tube of each charging pile device. Both the first and second storage cavities store refrigerant, and the first refrigerant temperature in the first storage cavity is higher than the second refrigerant temperature in the second storage cavity. The heat exchange device is connected to both the first and second storage cavities and can heat the refrigerant in the first storage cavity, cool the refrigerant in the second storage cavity, and exchange the refrigerant between the first and second storage cavities. The control module is electrically connected to each bidirectional pump and the heat exchange device, and executes the power-saving temperature control method. The method includes: acquiring the energy storage temperature of the energy storage power module of each charging pile device, and controlling the bidirectional pump corresponding to each charging pile device to perform an energy storage temperature regulation step. The energy storage temperature regulation step includes: when the energy storage temperature is lower than a first energy storage temperature threshold, controlling the bidirectional pump to operate with a first driving action, in which the bidirectional pump drives the refrigerant in the heat exchange tubes to flow from the first storage chamber to the second storage chamber; when the energy storage temperature is higher than a second energy storage temperature threshold, controlling the bidirectional pump to operate with a second driving action, in which the bidirectional pump drives the refrigerant in the heat exchange tubes to flow from the second storage chamber to the first storage chamber; acquiring refrigerant level information of at least one of the first and second storage chambers, and controlling the operation of the heat exchange device based on the refrigerant level information to exchange the refrigerant between the first and second storage chambers; acquiring a first refrigerant temperature in the first storage chamber, and when the first refrigerant temperature is lower than the first refrigerant temperature threshold, controlling the operation of the heat exchange device to heat the refrigerant in the first storage chamber; acquiring a second refrigerant temperature in the second storage chamber, and when the second refrigerant temperature is higher than the second refrigerant temperature threshold, controlling the operation of the heat exchange device to cool the refrigerant in the second storage chamber.

[0006] The power-saving temperature control method according to embodiments of the present invention has at least the following beneficial effects:

[0007] This invention relates to a power-saving temperature control method. A charging pile system can be deployed in a parking lot. When a vehicle enters the parking lot, it can choose a charging pile for charging. However, in each charging pile, some charging piles will use mains power to charge the energy storage module, while others will use the energy storage module to charge the vehicle. Both scenarios will cause the energy storage module to heat up. Meanwhile, some charging piles are in a static state. If the ambient temperature is low, the temperature of the energy storage module will also decrease. If a vehicle uses this charging pile or mains power to charge it, the low temperature of the energy storage module will affect the charging and discharging efficiency and lifespan. Therefore, the control module obtains the energy storage temperature of the energy storage power module of each charging pile device. For charging pile devices with lower energy storage temperatures, the control module controls the bidirectional pump to operate in a first driving action. In the first driving action, the bidirectional pump drives the refrigerant in the heat exchange tubes to flow from the first storage chamber to the second storage chamber. The refrigerant temperature in the first storage chamber is higher, and heat can be transferred to the energy storage power module with the lower energy storage temperature, raising the temperature of the energy storage power module to a suitable value for charging and discharging. At the same time, it lowers the temperature of the refrigerant so that it can flow into the second storage chamber. For charging pile devices with higher energy storage temperatures, the control module controls the bidirectional pump to operate in a second driving action. In the second driving action... A bidirectional pump drives the refrigerant in the heat exchange tubes from the second storage chamber to the first storage chamber. The refrigerant temperature in the second storage chamber is higher, allowing heat from the energy storage module to be transferred to the refrigerant, thus lowering the module temperature to a suitable level for charging and discharging. Simultaneously, this raises the refrigerant temperature so it can flow into the first storage chamber. When the refrigerant levels in both chambers are sufficient, and when the refrigerant temperatures in both chambers meet the first and second refrigerant temperature thresholds, the heat exchanger does not need to be started. Each charging station adaptively adjusts the temperature, significantly reducing energy consumption. This continues until the refrigerant temperature in the first and second storage chambers reaches the required threshold. When the refrigerant level in the storage chamber is low, the control module controls the heat exchange device to exchange the refrigerant between the first and second storage chambers to balance the refrigerant levels in the first and second storage chambers. Alternatively, when the temperature of the first refrigerant is lower than the first refrigerant temperature threshold, the control module controls the heat exchange device to heat the refrigerant in the first storage chamber. When the temperature of the second refrigerant is higher than the second refrigerant temperature threshold, the control module controls the heat exchange device to cool the refrigerant in the second storage chamber. This ensures that the refrigerant temperatures in the first and second storage chambers are appropriate for heat exchange with the corresponding energy storage power modules. This design effectively controls the temperature of the energy storage power modules in each charging pile device and reduces energy consumption and operating costs.

[0008] According to some embodiments of the present invention, the bypass heat exchange module includes an electric heat exchanger, a first inner ring pipe, and a second inner ring pipe. The electric heat exchanger has a heating part and a cooling part. The operation of the electric heat exchanger enables the heating part to heat up and the cooling part to cool down. The first and last ends of the first inner ring pipe are respectively connected to the first storage cavity, and the first and last ends of the second inner ring pipe are respectively connected to the second storage cavity. A first drive pump is disposed in the first inner ring pipe, and a second drive pump is disposed in the second inner ring pipe. The step of controlling the operation of the heat exchange device to heat the refrigerant in the first storage cavity when the first refrigerant temperature is lower than the first refrigerant temperature threshold includes: controlling the first drive pump to start and controlling the heating part of the electric heat exchanger to heat the first inner ring pipe when the first refrigerant temperature is lower than the first refrigerant temperature threshold; the step of controlling the operation of the heat exchange device to cool the refrigerant in the second storage cavity when the second refrigerant temperature is higher than the second refrigerant temperature threshold includes: controlling the second drive pump to start and controlling the cooling part of the electric heat exchanger to cool the second inner ring pipe.

[0009] According to some embodiments of the present invention, when either the first refrigerant temperature is lower than the first refrigerant temperature threshold or the second refrigerant temperature is higher than the second refrigerant temperature threshold, the first drive pump and the second drive pump are controlled to start, and the heating part of the electric heat exchanger is controlled to heat the first inner ring pipe and the cooling part of the electric heat exchanger is controlled to cool the second inner ring pipe.

[0010] According to some embodiments of the present invention, the bypass heat exchange module includes a first exchange pipe and a second exchange pipe. The first exchange pipe has its head end connected to a first storage cavity and its tail end connected to a second storage cavity. The second exchange pipe has its head end connected to the second storage cavity and its tail end connected to the first storage cavity. The cooling section of the electric heat exchanger can cool the first exchange pipe, and the heating section of the electric heat exchanger can heat the second exchange pipe. A third drive pump is disposed inside the first exchange pipe, and a fourth drive pump is disposed inside the second exchange pipe. The method of controlling the operation of the heat exchange device to exchange the refrigerant between the first and second storage cavities based on the refrigerant level information includes: when the first refrigerant level is lower than a first level threshold, controlling the fourth drive pump to start and controlling the heating section of the electric heat exchanger to heat the second exchange pipe; when the first refrigerant level is higher than a second level threshold, controlling the third drive pump to start and controlling the cooling section of the electric heat exchanger to cool the first exchange pipe.

[0011] According to some embodiments of the present invention, the step of controlling the bidirectional pump to operate with a first driving action when the energy storage temperature is lower than a first energy storage temperature threshold includes: calculating a first temperature difference between the first energy storage temperature threshold and the energy storage temperature; determining a first refrigerant flow rate based on the first temperature difference, wherein the first refrigerant flow rate is proportional to the first temperature difference; and controlling the bidirectional pump to operate with a first driving action, wherein the bidirectional pump drives the refrigerant in the heat exchange tube to flow from the first storage chamber to the second storage chamber at a flow rate approaching the first refrigerant flow rate.

[0012] According to some embodiments of the present invention, the step of controlling the bidirectional pump to operate in a second driving action when the energy storage temperature is higher than a second energy storage temperature threshold includes: calculating a second temperature difference between the energy storage temperature and the second energy storage temperature threshold; determining a second refrigerant flow rate based on the second temperature difference, wherein the second refrigerant flow rate is proportional to the second temperature difference; and controlling the bidirectional pump to operate in a second driving action, wherein the bidirectional pump drives the refrigerant in the heat exchange tube to flow from the second storage chamber to the first storage chamber at a flow rate approaching the second refrigerant flow rate.

[0013] According to some embodiments of the present invention, the power energy-saving temperature control method further includes: acquiring real-time time; when the real-time time is during a low-peak usage period and the number of charging pile devices with energy storage temperatures higher than the second energy storage temperature threshold is zero, then when the energy storage temperature of any charging pile device is lower than the first energy storage temperature threshold, the bidirectional pump is not controlled to operate with the first driving action.

[0014] According to a second aspect of the present invention, a charging pile system includes multiple charging pile devices, a heat exchange device, and a control module. Each charging pile device includes an energy storage power module. The energy storage power module is surrounded by heat exchange pipes and a bidirectional pump disposed within the heat exchange pipes. The energy storage power module and the heat exchange pipes can transfer heat to each other. The heat exchange device includes a first storage cavity, a second storage cavity, and a bypass heat exchange module. The first storage cavity is connected to the first end of the heat exchange pipe of each charging pile device, and the second storage cavity is connected to the tail end of the heat exchange pipe of each charging pile device. Both the first and second storage cavities store refrigerant, and the first refrigerant temperature in the first storage cavity is higher than the second refrigerant temperature in the second storage cavity. The heat exchange device is connected to both the first and second storage cavities. The heat exchange device can heat the refrigerant in the first storage cavity, cool the refrigerant in the second storage cavity, and exchange the refrigerant between the first and second storage cavities. The control module is electrically connected to each bidirectional pump and the heat exchange device. The control module executes the power-saving temperature control method disclosed in any of the above embodiments.

[0015] The charging pile system according to embodiments of the present invention has at least the following beneficial effects:

[0016] The charging pile system of the present invention applies the power energy saving and temperature control method disclosed in any of the above embodiments to reasonably control the temperature of the energy storage power module of each charging pile device, and reduce energy consumption and operating costs.

[0017] According to a third aspect of the present invention, the control device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the power-saving temperature control method disclosed in any of the above embodiments.

[0018] According to a fourth aspect of the present invention, a computer-readable storage medium stores a computer program that, when executed by a processor, implements the power-saving temperature control method disclosed in any of the above embodiments.

[0019] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of one embodiment of the charging pile system of the present invention;

[0022] Figure 2 This is a schematic diagram of the charging pile system of the present invention, according to one embodiment.

[0023] Figure 3 This is a flowchart of one embodiment of the power supply energy-saving temperature control method of the present invention;

[0024] Figure 4 This is a schematic diagram of the control device of the present invention in one embodiment.

[0025] Figure label:

[0026] Charging pile device 100; energy storage power module 110; heat exchange pipe fitting 120; bidirectional pump 130; heat exchange device 200; first storage chamber 210; second storage chamber 220; electric heat exchange component 230; heating element 231; cooling element 232; first inner ring pipe fitting 240; first drive pump 241; second inner ring pipe fitting 250; second drive pump 251; first exchange pipe fitting 260; third drive pump 261; second exchange pipe fitting 270; fourth drive pump 271; control module 300; first temperature sensor 410; second temperature sensor 420; third temperature sensor 430; liquid level sensor 440; processor 610; memory 620; input / output interface 630; communication interface 640; bus 650. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0028] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0030] like Figure 1 , 2 As shown, the power-saving temperature control method according to a first aspect embodiment of the present invention is applied to a charging pile system. The charging pile system includes multiple charging pile devices 100, heat exchange devices 200, and a control module 300. Each charging pile device 100 includes an energy storage power module 110. A heat exchange tube 120 and a bidirectional pump 130 disposed within the heat exchange tube 120 are arranged around the energy storage power module 110. The energy storage power module 110 and the heat exchange tube 120 can transfer heat to each other. The heat exchange device 200 includes a first storage cavity 210, a second storage cavity 220, and a bypass heat exchange module. The first storage cavity 210 is connected to the heat exchange tube 120 of each charging pile device 100. The first end is connected, and the second storage cavity 220 is connected to the tail end of the heat exchange tube 120 of each charging pile device 100. Both the first storage cavity 210 and the second storage cavity 220 store refrigerant, and the first refrigerant temperature in the first storage cavity 210 is higher than the second refrigerant temperature in the second storage cavity 220. The heat exchange device 200 is connected to the first storage cavity 210 and the second storage cavity 220 respectively. The heat exchange device 200 can heat the refrigerant in the first storage cavity 210, cool the refrigerant in the second storage cavity 220, and exchange the refrigerant between the first storage cavity 210 and the second storage cavity 220. The control module 300 is electrically connected to each bidirectional pump 130 and the heat exchange device 200 respectively.

[0031] When a vehicle enters the parking lot, it can choose to charge at a charging station 100. In this process, some charging stations 100 will use mains power to charge the energy storage module 110, while others will use the energy storage module 110 to charge the vehicle. Both situations will cause the energy storage module 110 to heat up. Since some charging stations 100 are in a static state, if the ambient temperature is low, the temperature of the energy storage module 110 will also decrease. If a vehicle uses this charging station 100 or mains power to charge it, the low temperature of the energy storage module 110 will affect the charging and discharging efficiency and its lifespan. The charging station system and power energy-saving temperature control method of this invention can reasonably regulate the energy storage temperature of each charging station 100.

[0032] The charging pile system can be deployed in a parking lot. The charging pile device 100 can be a conventional charging pile. The energy storage power module 110 includes an energy storage unit and a power modulation unit. The power modulation unit is connected to the energy storage unit to realize the charging and discharging of the energy storage unit. The energy storage unit can be selected from conventional batteries. The power modulation unit can include EMI circuit, AC-DC rectifier and filter circuit, inverter power modulation circuit, power control chip, etc., set on the circuit board. The power control chip is connected to the upper control module 300 to receive the control commands sent down to realize the charging and discharging control. The energy storage power module 110 is surrounded by heat exchange tubes 120. During the installation process, the energy storage power module 110 and the heat exchange tubes 120 can be installed as a whole in the charging pile device. The heat exchange tubes 120 in multiple charging pile devices need to be interconnected through the tubes. The charging plugs installed in the charging pile device 100 are all conventional components, which will not be described in detail here. The heat exchange tube 120 can be a small-diameter capillary tube. The heat exchange tube 120 surrounds the outer periphery of the energy storage power module 110 and contacts the wall of the energy storage power module 110 to fully exchange heat. The bidirectional pump 130 can be selected from conventional pumps with bidirectional switching function. Specifically, a pump with flow rate regulation function can also be selected.

[0033] The control module 300 can be a chip with processing functions such as an MCU or CPU, and its associated circuitry. Each charging pile device 100 is equipped with a first temperature sensor 410 to detect the temperature of the energy storage power module 110. Both the first storage cavity 210 and the second storage cavity 220 can be enclosed by sheet metal parts made of heat-insulating material. A second temperature sensor 420 is installed in the first storage cavity 210 to detect the temperature of the refrigerant in the first storage cavity 210, and a third temperature sensor 430 is installed in the second storage cavity 220 to detect the temperature of the refrigerant in the second storage cavity 220. Additionally, because the first storage... The refrigerant is not easily leaked in the internal circulation pipeline formed by the first storage chamber 210, the second storage chamber 220, each heat exchange pipe 120 and the bypass heat exchange module. Therefore, only one liquid level sensor 440 needs to be installed in either the first storage chamber 210 or the second storage chamber 220 to know the amount of refrigerant in the first storage chamber 210 and the second storage chamber 220. Specifically, the following description uses the liquid level sensor 440 installed in the first storage chamber 210 as an example. The control module 300 is connected to each of the first temperature sensor 410, the second temperature sensor 420, the third temperature sensor 430 and the liquid level sensor 440 respectively.

[0034] like Figure 3 As shown, the power-saving temperature control method implemented by the control module includes:

[0035] S510. Obtain the energy storage temperature of the energy storage power module of each charging pile device, and control the bidirectional pump corresponding to each charging pile device to perform the energy storage temperature regulation step. The energy storage temperature regulation step includes: when the energy storage temperature is lower than the first energy storage temperature threshold, control the bidirectional pump to run with the first driving action. In the first driving action, the bidirectional pump drives the refrigerant in the heat exchange tube to flow from the first storage cavity to the second storage cavity. When the energy storage temperature is higher than the second energy storage temperature threshold, control the bidirectional pump to run with the second driving action. In the second driving action, the bidirectional pump drives the refrigerant in the heat exchange tube to flow from the second storage cavity to the first storage cavity.

[0036] S520: Obtain refrigerant level information of at least one of the first storage cavity and the second storage cavity, and control the operation of the heat exchange device according to the refrigerant level information to exchange the refrigerant between the first storage cavity and the second storage cavity.

[0037] S530: Obtain the first refrigerant temperature of the first storage cavity; when the first refrigerant temperature is lower than the first refrigerant temperature threshold, control the heat exchange device to operate to heat the refrigerant in the first storage cavity.

[0038] S540: Obtain the temperature of the second refrigerant in the second storage cavity. When the temperature of the second refrigerant is higher than the second refrigerant temperature threshold, control the heat exchange device to operate to cool the refrigerant in the second storage cavity.

[0039] It is understandable that the energy storage power module 110 has an energy storage temperature range suitable for charging and discharging. The upper limit of the energy storage temperature range is used as the second energy storage temperature threshold, and the lower limit of the energy storage temperature range is used as the first energy storage temperature threshold. Specifically, both the first and second energy storage temperature thresholds can be set by the manufacturer according to the specific parameters of the energy storage power module 110.

[0040] The present invention provides a power-saving temperature control method. A control module 300 acquires the energy storage temperature of the energy storage power module 110 of each charging pile device 100. For charging pile devices 100 with lower energy storage temperatures, the control module 300 controls a bidirectional pump 130 to operate in a first driving action. In this first driving action, the bidirectional pump 130 drives the refrigerant in the heat exchange tube 120 to flow from the first storage chamber 210 to the second storage chamber 220. The refrigerant temperature in the first storage chamber 210 is higher, and heat can be transferred to the energy storage power module 110 with the lower energy storage temperature, causing the temperature of the energy storage power module 110 to rise to a suitable value for charging and discharging. Electricity simultaneously lowers the refrigerant temperature so it flows into the second storage chamber 220. For the charging pile device 100, which has a higher energy storage temperature, the control module 300 controls the bidirectional pump 130 to operate in a second driving action. In this second driving action, the bidirectional pump 130 drives the refrigerant in the heat exchange tube 120 from the second storage chamber 220 to the first storage chamber 210. The refrigerant temperature in the second storage chamber 220 is higher, allowing heat from the energy storage power module 110 to be transferred to the refrigerant, thus lowering the temperature of the energy storage power module 110 to a suitable value for charging and discharging. Simultaneously, this raises the refrigerant temperature so it flows into the first storage chamber 210. When the refrigerant levels in the first storage chamber 210 and the second storage chamber 220 are sufficient, and when the refrigerant temperatures in the first storage chamber 210 and the second storage chamber 220 correspond to the first and second refrigerant temperature thresholds, the heat exchange device 200 does not need to be started. Each charging pile device 100 adaptively adjusts the temperature, significantly reducing energy consumption. Only when the refrigerant levels in the first storage chamber 210 and the second storage chamber 220 are low does the control module 300 control the heat exchange device 200 to exchange the refrigerant between the first storage chamber 210 and the second storage chamber 220 to balance the refrigerant in the first storage chamber 210. The heat exchange device 200 is controlled to heat the refrigerant in the first storage chamber 210 when the refrigerant temperature is lower than the first refrigerant temperature threshold, and to cool the refrigerant in the second storage chamber 220 when the refrigerant temperature is higher than the second refrigerant temperature threshold. This ensures that the refrigerant temperature in the first storage chamber 210 and the second storage chamber 220 is appropriate for heat exchange with the corresponding energy storage power module 110. This design reasonably controls the temperature of the energy storage power module 110 of each charging pile device 100 and reduces energy consumption and operating costs.

[0041] In some embodiments of the present invention, such as Figure 1 , 2 As shown, the bypass heat exchange module includes an electric heat exchanger 230, a first inner ring pipe 240, and a second inner ring pipe 250. The electric heat exchanger 230 has a heating element 231 and a cooling element 232. The operation of the electric heat exchanger 230 enables the heating element 231 to heat up and the cooling element 232 to cool down. The first and last ends of the first inner ring pipe 240 are respectively connected to the first storage cavity 210, and the first and last ends of the second inner ring pipe 250 are respectively connected to the second storage cavity 220. A first drive pump 241 is installed inside the first inner ring pipe 240, and a second drive pump 251 is installed inside the second inner ring pipe 250. The step of controlling the heat exchange device to heat the refrigerant in the first storage cavity when the first refrigerant temperature is lower than the first refrigerant temperature threshold includes:

[0042] When the temperature of the first refrigerant is lower than the first refrigerant temperature threshold, the first drive pump is started and the heating part of the electric heat exchanger is heated to the first inner ring pipe.

[0043] The step of controlling the heat exchange device to cool the refrigerant in the second storage chamber when the temperature of the second refrigerant is higher than the second refrigerant temperature threshold includes:

[0044] The second drive pump is started and the cooling section of the electric heat exchanger is used to cool the second inner ring pipe.

[0045] The electric heat exchanger 230 can be a semiconductor heat exchanger plate, which has a heating surface as a heating part 231 and a cooling surface as a cooling part 232. Powering the electric heat exchanger 230 can cause the heating surface to heat up and the cooling surface to cool down. The electric heat exchanger 230 can also be a heat exchange system composed of a compressor, a condenser and an evaporator. The condenser can serve as the heating part 231 of the electric heat exchanger 230, and the evaporator can serve as the cooling part 232 of the electric heat exchanger 230.

[0046] It is understandable that the refrigerant temperature in the first storage chamber 210 is relatively high, and the first refrigerant temperature needs to be higher than the first refrigerant temperature threshold in order to provide heat to the energy storage power module 110 with a lower energy storage temperature. Therefore, when the first refrigerant temperature is lower than the first refrigerant temperature threshold, the first drive pump 241 and the electric heat exchanger 230 are started. The heating element 231 heats the first inner ring pipe 240. The first drive pump 241 enables the refrigerant in the first storage chamber 210 to flow in from the first end of the first inner ring pipe 240, absorb heat in the first inner ring pipe 240, and then flow out from the tail end of the first inner ring pipe 240 back into the first storage chamber 210. Continuous operation can increase the first refrigerant temperature in the first storage chamber 210.

[0047] Similarly, the refrigerant temperature in the second storage chamber 220 is relatively low, and the second refrigerant temperature needs to be lower than the second refrigerant temperature threshold in order to provide heat to the energy storage power module 110 with a higher energy storage temperature. Therefore, when the second refrigerant temperature is higher than the second refrigerant temperature threshold, the second drive pump 251 and the electric heat exchanger 230 are started. The cooling unit 232 heats the second inner ring pipe 250. The second drive pump 251 enables the refrigerant in the second storage chamber 220 to flow in from the first end of the second inner ring pipe 250, release heat in the second inner ring pipe 250, and then flow out from the tail end of the second inner ring pipe 250 into the second storage chamber 220. Continuous operation can reduce the second refrigerant temperature in the second storage chamber 220.

[0048] Generally, when the electric heat exchanger 230 is running, the heating part 231 heats up while the cooling part 232 cools down. Therefore, in order to improve energy utilization efficiency, in some embodiments of the present invention, when either the first refrigerant temperature is lower than the first refrigerant temperature threshold or the second refrigerant temperature is higher than the second refrigerant temperature threshold, the first drive pump 241 and the second drive pump 251 are started, and the heating part 231 of the electric heat exchanger 230 is controlled to heat the first inner ring pipe 240 and the cooling part 232 of the electric heat exchanger 230 is controlled to cool the second inner ring pipe 250. This fully utilizes the temperature difference formed between the heating part 231 and the cooling part 232 when the electric heat exchanger 230 is running, further increasing the temperature of the refrigerant in the first storage cavity 210 and decreasing the temperature of the refrigerant in the second storage cavity 220, thus ensuring the stable operation of the charging pile system.

[0049] In some embodiments of the present invention, the bypass heat exchange module includes a first exchange pipe 260 and a second exchange pipe 270. The first end of the first exchange pipe 260 is connected to the first storage cavity 210, and the last end of the first exchange pipe 260 is connected to the second storage cavity 220. The first end of the second exchange pipe 270 is connected to the second storage cavity 220, and the last end of the second exchange pipe 270 is connected to the first storage cavity 210. The cooling section 232 of the electric heat exchanger 230 can cool the first exchange pipe 260, and the heating section 231 of the electric heat exchanger 230 can heat the second exchange pipe 270. A third drive pump 261 is provided inside the first exchange pipe 260, and a fourth drive pump 271 is provided inside the second exchange pipe 270. The method of controlling the operation of the heat exchange device according to the refrigerant level information to exchange the refrigerant between the first and second storage cavities includes:

[0050] When the first refrigerant level is lower than the first level threshold, the fourth drive pump is started and the heating element of the electric heat exchanger is heated to heat the second heat exchange tube.

[0051] When the first refrigerant level is higher than the second level threshold, the third drive pump is started and the refrigeration section of the electric heat exchanger is controlled to refrigerate the first heat exchange pipe.

[0052] Understandably, if, during a certain period, the energy storage temperature of a large number of energy storage modules 110 is high, meaning that multiple bidirectional pumps 130 execute the second drive action, the refrigerant in the first storage chamber 210 will gradually increase, while the refrigerant in the second storage chamber 220 will gradually decrease. Simultaneously, the temperature of the refrigerant will also increase due to continuous heat dissipation from the energy storage modules 110. When the refrigerant level decreases to a certain point, it becomes impossible to maintain temperature control for each energy storage module 110. Therefore, when the first refrigerant level is higher than the second level threshold, the third drive pump 261 is activated, and the cooling section 232 of the electric heat exchanger 230 is controlled to cool the first heat exchanger 2... 60. In the cooling process, the refrigerant in the first storage chamber 210 flows into the first exchange pipe 260, is cooled by the cooling part 232 of the electric heat exchanger 230, and then flows out from the tail end of the first exchange pipe 260 to the second storage chamber 220. Conversely, when the first refrigerant level is lower than the first level threshold, the fourth drive pump 271 is started and the heating part 231 of the electric heat exchanger 230 is heated to heat the second exchange pipe 270. The refrigerant in the second storage chamber 220 flows into the first end of the second exchange pipe 270, is heated by the heating part 231 of the electric heat exchanger 230, and then flows out from the tail end of the second exchange pipe 270 to the first storage chamber 210.

[0053] In some embodiments of the present invention, the step of controlling the bidirectional pump to operate with a first driving action when the energy storage temperature is lower than a first energy storage temperature threshold includes:

[0054] Calculate the first temperature difference between the first energy storage temperature threshold and the first energy storage temperature;

[0055] The first refrigerant flow rate is determined based on the first temperature difference value, wherein the first refrigerant flow rate is proportional to the first temperature difference value;

[0056] The bidirectional pump is controlled to operate with a first driving action, wherein the bidirectional pump drives the refrigerant in the heat exchange tubes to flow from the first storage chamber to the second storage chamber at a velocity close to the first refrigerant flow rate.

[0057] Understandably, both excessively low and high energy storage temperatures will affect the charging and discharging operation of the energy storage power module. When the energy storage temperature is too low, the first temperature difference between the energy storage temperature and the first energy storage temperature threshold will also be larger. At this time, it is necessary to quickly increase the energy storage temperature of the energy storage power module to cope with future vehicle charging. Therefore, the first refrigerant flow rate is obtained by using the first temperature difference in a proportional function, for example, y = kx, where y is the first refrigerant flow rate, x is the first temperature difference, and k is the proportionality coefficient set by the manufacturer. As the first temperature difference increases, the first refrigerant flow rate will also increase, and heat can be transferred to the corresponding energy storage power module more quickly. When the first temperature difference is small, the first refrigerant flow rate is also low, which is easy to adjust and prevents excessive occupation of the refrigerant in the first storage cavity, providing more space for temperature adjustment of other energy storage power modules.

[0058] Similarly, in some embodiments of the present invention, the step of controlling the bidirectional pump to operate with a second driving action when the energy storage temperature is higher than a second energy storage temperature threshold includes:

[0059] Calculate the second temperature difference between the energy storage temperature and the second energy storage temperature threshold;

[0060] The second refrigerant flow rate is determined based on the second temperature difference, wherein the second refrigerant flow rate is proportional to the second temperature difference.

[0061] The bidirectional pump is controlled to operate with a second driving action, wherein the bidirectional pump drives the refrigerant in the heat exchange tube to flow from the second storage chamber to the first storage chamber at a velocity close to the second refrigerant flow rate.

[0062] When the energy storage temperature is too high, the second temperature difference between the energy storage temperature and the second energy storage temperature threshold will also be larger. At this time, it is necessary to quickly increase the energy storage temperature of the energy storage power module to cope with the future charging of vehicles. Therefore, the second refrigerant flow rate is obtained by using the second temperature difference in a proportional function, for example, y = kx, where y is the second refrigerant flow rate, x is the second temperature difference, and k is the proportional coefficient set by the manufacturer. As the second temperature difference increases, the second refrigerant flow rate will also increase, and the heat of the energy storage power module can be dissipated more quickly. When the second temperature difference is small, the second refrigerant flow rate is also low, which is easy to adjust and reduces the refrigerant resources occupied in the second storage cavity.

[0063] In some embodiments of the present invention, the power supply energy-saving temperature control method further includes:

[0064] Get real-time time;

[0065] When the real-time is during a low-peak usage period and the number of charging pile devices with energy storage temperatures higher than the second energy storage temperature threshold is zero, then when the energy storage temperature of any charging pile device is lower than the first energy storage temperature threshold, the bidirectional pump will not be controlled to operate in the first drive action.

[0066] Understandably, during the late night hours, the frequency of use of each charging station drops significantly. At this time, the temperature of the unused energy storage power module naturally drops below the first energy storage temperature threshold. However, since the charging station is unlikely to be used for a long period of time afterward, it would be a waste of energy to maintain the temperature of the energy storage power module.

[0067] Therefore, the real-time time and off-peak usage periods can be set by staff based on the specific charging habits of users in the city where the charging pile system is located. For example, the off-peak usage period can be set to 0:00-6:00 AM. When the real-time time is within this period, as long as the number of charging pile devices with energy storage temperatures higher than the second energy storage temperature threshold is zero, that is, other charging pile devices with lower energy storage temperatures do not need to exchange heat with the refrigerant to meet the heat dissipation needs of charging pile devices with higher energy storage temperatures, the bidirectional pumps corresponding to the charging pile devices with lower energy storage temperatures will not be controlled to operate in the first drive action.

[0068] Of course, if a vehicle enters the parking lot during off-peak hours and connects to a charging station with a lower temperature, the bidirectional pump corresponding to the charging station will operate in the first driving action to raise the energy storage temperature of the energy storage power module to the first energy storage temperature threshold before charging the vehicle.

[0069] According to a second aspect of the present invention, a charging pile system includes a plurality of charging pile devices 100, a heat exchange device 200, and a control module 300. Each charging pile device 100 includes an energy storage power module 110, on which a heat exchange tube 120 is arranged and a bidirectional pump 130 is disposed within the heat exchange tube 120. The energy storage power module 110 and the heat exchange tube 120 are capable of transferring heat to each other. The heat exchange device 200 includes a first storage cavity 210, a second storage cavity 220, and a bypass heat exchange module. The first storage cavity 210 is connected to the first end of the heat exchange tube 120 of each charging pile device 100, and the second storage cavity 220 is connected to each charging pile device 100. The tail end of the heat exchange tube 120 is connected. The first storage chamber 210 and the second storage chamber 220 both store refrigerant, and the first refrigerant temperature in the first storage chamber 210 is higher than the second refrigerant temperature in the second storage chamber 220. The heat exchange device 200 is connected to the first storage chamber 210 and the second storage chamber 220 respectively. The heat exchange device 200 can heat the refrigerant in the first storage chamber 210, cool the refrigerant in the second storage chamber 220, and exchange the refrigerant between the first storage chamber 210 and the second storage chamber 220. The control module 300 is electrically connected to each bidirectional pump 130 and the heat exchange device 200 respectively. The control module 300 executes the power-saving temperature control method disclosed in any of the above embodiments.

[0070] The charging pile system of the present invention applies the power energy saving and temperature control method disclosed in any of the above embodiments to reasonably control the temperature of the energy storage power module of each charging pile device, and reduce energy consumption and operating costs.

[0071] According to a third aspect of the present invention, the control device includes a memory 620 and a processor 610. The memory 620 stores a computer program, and the processor 610 executes the computer program to implement the power-saving temperature control method disclosed in any of the above embodiments.

[0072] like Figure 4 As shown, Figure 4 The hardware structure of a control device according to another embodiment is also illustrated. The control device includes:

[0073] The processor 610 can be implemented using a general-purpose central processing unit (CPU), a microprocessor 610, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application.

[0074] The memory 620 can be implemented as a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 620 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 620 and is called and executed by the processor 610 to implement the power saving and temperature control method of the embodiments of this application.

[0075] The input / output interface 630 is used to realize information input and output;

[0076] The communication interface 640 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0077] Bus 650 transmits information between various components of the device (e.g., processor 610, memory 620, input / output interface 630, and communication interface 640);

[0078] The processor 610, memory 620, input / output interface 630 and communication interface 640 are connected to each other within the device via bus 650.

[0079] According to a fourth aspect of the present invention, a computer-readable storage medium stores a computer program that, when executed by a processor 610, implements the power-saving temperature control method disclosed in any of the above embodiments.

[0080] Memory 620, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 620 may optionally include memory remotely located relative to the processor, which can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0081] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0082] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0083] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0084] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0085] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0086] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A power-saving temperature control method applied to a charging pile system. The charging pile system includes multiple charging pile devices, a heat exchange device, and a control module. Each charging pile device includes an energy storage power module. The energy storage power module has heat exchange pipes arranged around it and a bidirectional pump installed within the heat exchange pipes. The energy storage power module and the heat exchange pipes can transfer heat to each other. The heat exchange device includes a first storage chamber, a second storage chamber, and a bypass heat exchange module. The first storage chamber is connected to the first end of the heat exchange pipes of each charging pile device, and the second storage chamber is connected to the tail end of the heat exchange pipes of each charging pile device. Both the first and second storage chambers store refrigerant, and the temperature of the first refrigerant in the first storage chamber is higher than the temperature of the second refrigerant in the second storage chamber. The heat exchange device is connected to both the first and second storage chambers and can heat the refrigerant in the first storage chamber, cool the refrigerant in the second storage chamber, and exchange the refrigerant between the first and second storage chambers. The control module is electrically connected to each bidirectional pump and the heat exchange device. The method is characterized in that… The control module implements power-saving temperature control methods including: The energy storage temperature of the energy storage power module of each charging pile device is obtained, and the bidirectional pump corresponding to each charging pile device is controlled to perform the energy storage temperature regulation step. The energy storage temperature regulation step includes: when the energy storage temperature is lower than the first energy storage temperature threshold, the bidirectional pump is controlled to operate with the first driving action. In the first driving action, the bidirectional pump drives the refrigerant in the heat exchange tube to flow from the first storage chamber to the second storage chamber. When the energy storage temperature is higher than the second energy storage temperature threshold, the bidirectional pump is controlled to operate with the second driving action. In the second driving action, the bidirectional pump drives the refrigerant in the heat exchange tube to flow from the second storage chamber to the first storage chamber. The refrigerant level information of at least one of the first and second storage cavities is obtained, and the operation of the heat exchange device is controlled according to the refrigerant level information to exchange the refrigerant between the first and second storage cavities. The first refrigerant temperature of the first storage cavity is obtained. When the first refrigerant temperature is lower than the first refrigerant temperature threshold, the heat exchange device is controlled to operate to heat the refrigerant in the first storage cavity. The temperature of the second refrigerant in the second storage cavity is obtained. When the temperature of the second refrigerant is higher than the second refrigerant temperature threshold, the heat exchange device is controlled to operate to cool the refrigerant in the second storage cavity.

2. The power-saving temperature control method according to claim 1, wherein the bypass heat exchange module includes an electric heat exchanger, a first inner ring pipe, and a second inner ring pipe; the electric heat exchanger has a heating part and a cooling part; the operation of the electric heat exchanger enables the heating part to heat up and the cooling part to cool down; the first and last ends of the first inner ring pipe are respectively connected to the first storage cavity; the first and last ends of the second inner ring pipe are respectively connected to the second storage cavity; a first driving pump is disposed inside the first inner ring pipe; and a second driving pump is disposed inside the second inner ring pipe. The step of controlling the heat exchange device to heat the refrigerant in the first storage chamber when the first refrigerant temperature is lower than the first refrigerant temperature threshold includes: When the temperature of the first refrigerant is lower than the first refrigerant temperature threshold, the first drive pump is started and the heating part of the electric heat exchanger is heated to the first inner ring pipe. The step of controlling the heat exchange device to cool the refrigerant in the second storage chamber when the temperature of the second refrigerant is higher than the second refrigerant temperature threshold includes: The second drive pump is started and the cooling section of the electric heat exchanger is used to cool the second inner ring pipe.

3. The power supply energy-saving temperature control method according to claim 2, characterized in that, When either the first refrigerant temperature is lower than the first refrigerant temperature threshold or the second refrigerant temperature is higher than the second refrigerant temperature threshold, the first drive pump and the second drive pump are started, and the heating part of the electric heat exchanger is controlled to heat the first inner ring pipe and the cooling part of the electric heat exchanger is controlled to cool the second inner ring pipe.

4. The power-saving temperature control method according to claim 2, wherein the bypass heat exchange module includes a first exchange pipe and a second exchange pipe, the first end of the first exchange pipe is connected to a first storage cavity, the tail end of the first exchange pipe is connected to a second storage cavity, the first end of the second exchange pipe is connected to the second storage cavity, and the tail end of the second exchange pipe is connected to the first storage cavity; the cooling part of the electric heat exchanger can cool the first exchange pipe, and the heating part of the electric heat exchanger can heat the second exchange pipe; a third drive pump is provided inside the first exchange pipe, and a fourth drive pump is provided inside the second exchange pipe; the refrigerant level information includes the first refrigerant level in the first storage cavity, characterized in that... The refrigerant used to control the operation of the heat exchange device based on refrigerant level information to exchange the refrigerant between the first and second storage chambers includes: When the first refrigerant level is lower than the first level threshold, the fourth drive pump is started and the heating element of the electric heat exchanger is heated to heat the second heat exchange tube. When the first refrigerant level is higher than the second level threshold, the third drive pump is started and the refrigeration section of the electric heat exchanger is controlled to refrigerate the first heat exchange pipe.

5. The power supply energy-saving temperature control method according to claim 1, characterized in that, The step of controlling the bidirectional pump to operate with a first drive action when the energy storage temperature is lower than the first energy storage temperature threshold includes: Calculate the first temperature difference between the first energy storage temperature threshold and the first energy storage temperature; The first refrigerant flow rate is determined based on the first temperature difference value, wherein the first refrigerant flow rate is proportional to the first temperature difference value; The bidirectional pump is controlled to operate with a first driving action, wherein the bidirectional pump drives the refrigerant in the heat exchange tubes to flow from the first storage chamber to the second storage chamber at a velocity close to the first refrigerant flow rate.

6. The power supply energy-saving temperature control method according to claim 1, characterized in that, The step of controlling the bidirectional pump to operate in a second drive action when the energy storage temperature is higher than the second energy storage temperature threshold includes: Calculate the second temperature difference between the energy storage temperature and the second energy storage temperature threshold; The second refrigerant flow rate is determined based on the second temperature difference, wherein the second refrigerant flow rate is proportional to the second temperature difference. The bidirectional pump is controlled to operate with a second driving action, wherein the bidirectional pump drives the refrigerant in the heat exchange tube to flow from the second storage chamber to the first storage chamber at a velocity close to the second refrigerant flow rate.

7. The power supply energy-saving temperature control method according to claim 1, characterized in that, Also includes: Get real-time time; When the real-time is during a low-peak usage period and the number of charging pile devices with energy storage temperatures higher than the second energy storage temperature threshold is zero, then when the energy storage temperature of any charging pile device is lower than the first energy storage temperature threshold, the bidirectional pump will not be controlled to operate in the first drive action.

8. A charging pile system, characterized in that, The device includes multiple charging piles, a heat exchange device, and a control module. Each charging pile includes an energy storage power module, around which heat exchange pipes and a bidirectional pump are arranged. The energy storage power module and the heat exchange pipes can transfer heat to each other. The heat exchange device includes a first storage chamber, a second storage chamber, and a bypass heat exchange module. The first storage chamber is connected to the first end of the heat exchange pipes of each charging pile, and the second storage chamber is connected to the tail end of the heat exchange pipes of each charging pile. Both the first and second storage chambers store refrigerant, and the first refrigerant temperature in the first storage chamber is higher than the second refrigerant temperature in the second storage chamber. The heat exchange device is connected to both the first and second storage chambers and can heat the refrigerant in the first storage chamber, cool the refrigerant in the second storage chamber, and exchange the refrigerant between the first and second storage chambers. The control module is electrically connected to each bidirectional pump and the heat exchange device. The control module executes the power-saving temperature control method as described in any one of claims 1 to 7.

9. A control device, characterized in that, The control device includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the power-saving temperature control method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the power-saving temperature control method according to any one of claims 1 to 7.

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