Battery cooling system for a ship and method of controlling the same

Abstract

The application relates to the technical field of power battery liquid cooling, and discloses a battery cooling system for a ship and a control method thereof, which comprises a compressor, a condenser, a condensing fan, a first heat exchanger, a second heat exchanger, a third heat exchanger, a first water pump and a second water pump, wherein the condensing fan is arranged opposite to the condenser, the compressor, the condenser and the first heat exchanger are communicated and combined with the condensing fan to form a compressor refrigeration circulating system, the first heat exchanger, the second heat exchanger and the compressor are communicated to form a seawater refrigeration circulating system, the third heat exchanger and the second water pump are communicated to form a seawater water cooling circulating system, the first heat exchanger, the third heat exchanger and the first water pump are communicated to form a cooling circulating system, and the working modes of the battery cooling system for the ship include a wind source refrigeration mode, a seawater source refrigeration mode and a seawater source water cooling mode. The application fully utilizes a natural cold source, greatly reduces the consumption of energy, and designs three cooling modes which can be switched according to requirements.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling technology for power batteries, and specifically to a battery cooling system for ships and its control method. Background Technology

[0002] As an important means of transportation and production in human history, ships are crucial in many core areas such as the global economy, international trade, people's livelihood, and technological development. They are a key link connecting land, sea, and the global system. The power of ships is the key to ensuring their normal navigation. At present, ships are still mostly powered by diesel, and ship cooling systems are mostly used for heat dissipation in ship refrigeration rooms, air conditioning, data centers, etc. Therefore, there are still many gaps in the field of heat dissipation of electric ship power batteries, and electric ship power batteries lack corresponding efficient heat dissipation systems. Summary of the Invention

[0003] In view of this, the present invention provides a battery cooling system for ships and a control method thereof to solve the problem of heat dissipation of ship power batteries.

[0004] In a first aspect, the present invention provides a marine battery cooling system, comprising a compressor, a condenser, a condensing fan, a first heat exchanger, a second heat exchanger, a third heat exchanger, a first water pump, and a second water pump. The condensing fan is disposed opposite to the condenser. The compressor, the condenser, and the first heat exchanger are connected and combined with the condensing fan to form a compressor refrigeration cycle system. The first heat exchanger, the second heat exchanger, and the compressor are connected to form a seawater refrigeration cycle system. The seawater refrigeration cycle system has a seawater inlet and includes a first valve disposed near the seawater inlet. The third heat exchanger and the second water pump are connected to form a... The seawater cooling circulation system, the first heat exchanger, the third heat exchanger, and the first water pump are connected to form a cooling circulation system. The operating modes of the marine battery cooling system include air-source cooling mode, seawater-source cooling mode, and seawater-source water-cooling mode. When the marine battery cooling system is in the air-source cooling mode, the compressor cooling circulation system is activated to exchange heat for the cooling circulation system. When the marine battery cooling system is in the seawater-source cooling mode, the seawater cooling circulation system is activated to exchange heat for the cooling circulation system. When the marine battery cooling system is in the seawater-source water-cooling mode, the seawater-source water-cooling circulation system is activated to exchange heat for the cooling circulation system.

[0005] Optionally, the second water pump, the second heat exchanger, and the third heat exchanger are connected to form a clean circulation system; the operating mode of the marine battery cooling system also includes a clean mode, when the marine battery cooling system is in the clean mode, the clean circulation system is activated to clean the seawater cooling circulation system and the seawater water cooling circulation system.

[0006] Optionally, the compressor refrigeration system includes a compressor refrigeration circulation pipeline, and the compressor, the condenser, and the first heat exchanger are disposed in the compressor refrigeration circulation pipeline.

[0007] Optionally, the seawater refrigeration cycle system further includes a seawater refrigeration cycle pipeline, which is connected to the compressor refrigeration cycle pipeline. The second heat exchanger is disposed in the seawater refrigeration cycle pipeline and is connected in parallel with the condenser.

[0008] Optionally, the seawater refrigeration cycle system includes a first seawater circulation pipeline and a third valve. The first valve, the third valve, and the second heat exchanger are disposed in the first seawater circulation pipeline. The seawater inlet is formed in the first seawater circulation pipeline. The first seawater circulation pipeline also has a seawater outlet. The third valve is disposed near the seawater outlet. The first seawater circulation pipeline and the seawater refrigeration cycle pipeline exchange heat through the second heat exchanger.

[0009] Optionally, the seawater cooling circulation system includes a second seawater circulation pipeline and a fourth valve. The fourth valve, the third heat exchanger, and the second water pump are installed in the second seawater circulation pipeline. The second seawater circulation pipeline is connected to the first seawater circulation pipeline. The second heat exchanger is connected in parallel with the third heat exchanger. The first seawater circulation pipeline is also equipped with a second valve.

[0010] Optionally, the cleaning circulation system includes a cleaning inlet branch, a cleaning outlet branch, a fifth valve, and a sixth valve. Both the cleaning inlet branch and the cleaning outlet branch are connected to the first seawater circulation pipeline. The fifth valve is located on the cleaning inlet branch, and the sixth valve is located on the cleaning outlet branch. The connection between the cleaning inlet branch and the first seawater circulation pipeline is located between the first valve and the second heat exchanger, and the connection between the cleaning outlet branch and the first seawater circulation pipeline is located between the second heat exchanger and the third valve.

[0011] Optionally, the cooling circulation system includes a cooling circulation pipeline, and the first water pump, the first heat exchanger, and the third heat exchanger are disposed in the cooling circulation pipeline, and at least two first water pumps are disposed in parallel.

[0012] The present invention also provides a control method for controlling the above-mentioned marine battery cooling system, comprising the following steps: obtaining the inlet temperature of the condenser, the outlet temperature of the third heat exchanger, and the inlet temperature of the seawater cooling circulation system; and controlling the marine battery cooling system to select a mode based on the inlet temperature of the condenser, the outlet temperature of the third heat exchanger, and the inlet temperature of the seawater cooling circulation system.

[0013] Optionally, the step of selecting the mode for the marine battery cooling system based on the inlet temperature of the condenser, the outlet temperature of the third heat exchanger, and the outlet temperature of the first valve includes: when the inlet temperature of the condenser is <T2 and the outlet temperature of the third heat exchanger is ≥T1, the compressor refrigeration cycle system is operated to exchange heat for the cooling cycle system, wherein T1 refers to the outlet temperature of the cooling cycle system set according to user requirements, and T2 refers to the ambient temperature at the inlet of the condenser; when the inlet temperature of the condenser is ≥T2, the outlet temperature of the first valve is ≥T3, and the outlet temperature of the third heat exchanger is ≥T1, the seawater source cooling mode is operated to exchange heat for the cooling cycle system, wherein T3 refers to the inlet temperature threshold of the first valve set by the user; when the inlet temperature of the condenser is ≥T2, the outlet temperature of the first valve is <T3, and the outlet temperature of the third heat exchanger is ≥T1, the seawater source water cooling mode is operated to exchange heat for the cooling cycle system.

[0014] The technical solution of the present invention has the following advantages:

[0015] 1. This invention provides a marine battery cooling system. A compressor refrigeration cycle system is formed by connecting a compressor, a condenser, and a first heat exchanger. A condenser fan is positioned opposite the condenser. A seawater refrigeration cycle system is formed by connecting the first heat exchanger, a second heat exchanger, and the compressor. A seawater water-cooling cycle system is formed by connecting the third heat exchanger and a second water pump. A cooling cycle system is formed by connecting the first heat exchanger, the third heat exchanger, and the first water pump. Therefore, this heating system can operate in three modes: air-source cooling, seawater-source cooling, and seawater-source water-cooling. When the seawater temperature is low, the marine battery cooling system can use seawater to cool the battery coolant. When the air temperature is low, it can also use sea breeze to cool the battery coolant. It automatically selects the optimal cooling method under different environmental conditions, maximizing the use of natural cold sources. By fully utilizing natural cold sources, energy consumption is significantly reduced. When natural resources are insufficient, the compressor refrigeration cycle system can also be used for cooling. This switching according to different situations improves the energy efficiency of the liquid cooling system and provides protection in case of failure of a particular cooling system.

[0016] 2. The present invention provides a marine battery cooling system, which forms a clean circulation system through the connection of a second water pump, a second heat exchanger, and a third heat exchanger. The marine battery cooling system has a cleaning mode, capable of cleaning salt deposits, biofouling, and silt from seawater pipes. This cleaning mode is particularly important when ships sail for extended periods in waters with high salinity and abundant biofouling, ensuring the unobstructed flow of seawater pipes and maintaining heat exchange efficiency. It prevents performance degradation or even malfunction of the cooling system due to pipe blockage, thereby ensuring the continuous, stable, and efficient operation of the marine battery cooling system.

[0017] 3. The present invention provides a marine battery cooling system, which incorporates at least two water pumps in the cooling circulation system. When both pumps are functioning properly, they are periodically rotated, such as daily or weekly, extending their service life under strong vibration environments. If one pump fails, the remaining pumps can continuously ensure the circulation of the cooling system. This multi-pump parallel design improves the system's reliability and stability, ensuring uninterrupted operation of the cooling circulation system even if one pump fails. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a marine battery cooling system provided in Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the compressor refrigeration cycle system provided in Embodiment 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of the seawater refrigeration cycle system provided in Embodiment 1 of the present invention;

[0022] Figure 4 This is a schematic diagram of the seawater cooling circulation system provided in Embodiment 1 of the present invention;

[0023] Figure 5 This is a schematic diagram of the cooling circulation system provided in Embodiment 1 of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure during cooling in the air-source cooling mode provided in Embodiment 1 of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure during cooling using the seawater source cooling mode provided in Embodiment 1 of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure during seawater source cooling mode provided in Embodiment 1 of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure during operation of the cleaning mode provided in Embodiment 1 of the present invention;

[0028] Figure 10 This is a temperature control flowchart in a control method for a marine battery cooling system provided in Embodiment 2 of the present invention;

[0029] Figure 11 This is a flowchart of the air-source cooling mode control method provided in Embodiment 2 of the present invention;

[0030] Figure 12 This is a flowchart of the seawater source cooling mode control method provided in Embodiment 2 of the present invention;

[0031] Figure 13 This is a flowchart of the seawater source cooling mode control method provided in Embodiment 2 of the present invention;

[0032] Figure 14 The flowchart is for the cleaning mode control method provided in Embodiment 2 of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100. Compressor refrigeration cycle system; 101. Compressor; 102. Condenser; 103. First heat exchanger; 104. Condenser fan; 105. Compressor refrigeration cycle pipeline; 106. First temperature sensor; 107. Second temperature sensor; 108. Third temperature sensor; 109. First pressure sensor; 110. Second pressure sensor; 111. Electronic expansion valve; 112. First solenoid valve; 113. First check valve; 114. First refrigerant charging port; 115. Second refrigerant charging port; 116. Gas-liquid separator; 117. Pressure switch; 118. Seventh temperature sensor; 200. Seawater refrigeration cycle system; 201. Second heat exchanger; 202. Seawater refrigeration cycle pipeline; 203. First seawater circulation pipeline; 2031. First branch; 2032. Second branch; 2033. Third branch; 2034. Fourth branch Branch 2035, Fifth Branch; 204, Second Valve; 300, Seawater Cooling Circulation System; 301, Third Heat Exchanger; 302, Second Seawater Circulation Pipeline; 3021, Sixth Branch; 303, First Valve; 304, Third Valve; 305, Fourth Valve; 306, Filter Device; 307, Third Pressure Sensor; 308, Fourth Pressure Sensor; 309, Sixth Temperature Sensor; 400, Cooling Circulation System; 401, First Water Pump; 402, Safety Valve; 403, Expansion Tank; 404, Fourth Temperature Sensor; 405, Fifth Temperature Sensor; 406, Second Check Valve; 407, Third Check Valve; 408, Cooling Circulation Pipeline; 500, Cleaning Circulation System; 501, Second Water Pump; 502, Cleaning Inlet Branch; 503, Cleaning Outlet Branch; 504, Fifth Valve; 505, Sixth Valve. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Example 1

[0040] like Figures 1 to 9 A specific embodiment of a marine battery cooling system includes: a compressor 101, a condenser 102, a condensing fan 104, a first heat exchanger 103, a second heat exchanger 201, a third heat exchanger 301, a first water pump 401, and a second water pump 501. The condensing fan 104 is positioned opposite to the condenser 102. The compressor 101, condenser 102, and first heat exchanger 103 are connected and combined with the condensing fan 104 to form a compressor refrigeration cycle system 100. The first heat exchanger 103, second heat exchanger 201, and compressor 101 are connected to form a seawater refrigeration cycle system 200. The seawater refrigeration cycle system 200 has a seawater inlet and includes a first valve 3 located near the seawater inlet. 03, the third heat exchanger 301 and the second water pump 501 are connected to form a seawater cooling circulation system 300, the first heat exchanger 103, the third heat exchanger 301 and the first water pump 401 are connected to form a cooling circulation system 400; the working modes of the marine battery cooling system include air source cooling mode, seawater source cooling mode and seawater source water cooling mode. When the marine battery cooling system is in air source cooling mode, the compressor cooling circulation system 100 is turned on to exchange heat for the cooling circulation system 400. When the marine battery cooling system is in seawater source cooling mode, the seawater cooling circulation system 200 is turned on to exchange heat for the cooling circulation system 400. When the marine battery cooling system is in seawater source water cooling mode, the seawater cooling circulation system 300 is turned on to exchange heat for the cooling circulation system 400.

[0041] The marine battery cooling system of this embodiment can select different operating modes according to different environments and needs. In air-source cooling mode, the marine battery cooling system activates the compressor refrigeration cycle system 100, starts the condenser fan 104 and condenser 102 to ensure the battery pack is at a suitable temperature. In seawater-source cooling mode, the seawater refrigeration cycle system 200 cools the battery pack. In seawater-source water-cooling mode, the seawater water-cooling cycle system 300 directly utilizes seawater for cooling, making full use of environmental energy to reduce energy consumption. This invention provides a liquid cooling system for pure electric ships, utilizing different natural resources under different ambient temperatures to provide an efficient heat dissipation source for the batteries of pure electric ships.

[0042] It is worth noting that in related technologies, diesel is still the main power source for ship propulsion, while liquid cooling systems for ships are mostly used for heat dissipation in ship refrigeration rooms, air conditioning, data centers, etc. Therefore, there are still many gaps in the field of heat dissipation for electric ship power batteries. In addition, ships are subject to long-term vibration and turbulence at sea, and marine equipment is prone to damage or failure in this harsh operating environment. Therefore, emergency handling or alternative solutions for failures also need to be considered.

[0043] like Figure 9 As shown, the second water pump 501, the second heat exchanger 201, and the third heat exchanger 301 are connected to form a clean circulation system 500; the operating mode of the marine battery cooling system also includes a clean mode. When the marine battery cooling system is in the clean mode, the clean circulation system 500 is turned on to clean the seawater cooling circulation system 200 and the seawater cooling circulation system 300.

[0044] By setting a cleaning mode, the accumulation of dirt and impurities in the seawater cooling circulation system 200 and the seawater water cooling circulation system 300 during use is effectively resolved, effectively extending the service life of the pipelines and ensuring the long-term stable operation of the system.

[0045] Specifically, in this embodiment, such as Figure 1 , Figure 2 as well as Figure 6 As shown, the compressor refrigeration cycle system 100 includes a compressor refrigeration cycle pipeline 105, and a compressor 101, a condenser 102, and a first heat exchanger 103 are disposed in the compressor refrigeration cycle pipeline 105.

[0046] It is worth noting that the compressor refrigeration cycle pipeline 105 is also equipped with a first temperature sensor 106, a first pressure sensor 109, a second temperature sensor 107, a second pressure sensor 110, a gas-liquid separator 116, a pressure switch 117, a first solenoid valve 112, a first refrigerant charging port 114, a second refrigerant charging port 115, a third temperature sensor 108, a first one-way valve 113, and an electronic expansion valve 111, and a seventh temperature sensor 118 is installed at the inlet of the condenser 102.

[0047] In this system, compressor 101 draws in low-pressure, low-temperature refrigerant and raises its pressure and temperature through mechanical compression; first solenoid valve 112 regulates the flow of refrigerant to condenser 102; condenser 102 releases the heat from the high-pressure, high-temperature gaseous refrigerant discharged from compressor 101 to the outside via condenser fan 104, causing the refrigerant to condense and liquefy; first check valve 113 prevents refrigerant from flowing back into condenser 102 in other operating modes; electronic expansion valve 111 controls the flow rate of high-pressure liquid refrigerant through a throttling orifice or valve core, reducing its pressure and allowing it to rapidly expand and cool before entering first heat exchanger 103; the low-pressure, low-temperature gas-liquid... The mixed refrigerant absorbs heat from the cooling cycle system 400 in the first heat exchanger 103, causing the liquid refrigerant to completely evaporate into a gaseous state. The gas-liquid separator 116 protects the compressor 101 from liquid slugging damage by preventing liquid refrigerant from entering, while stabilizing the refrigerant state and balancing the circulation volume. The first refrigerant charging port 114 and the second refrigerant charging port 115 are used to charge or release refrigerant. The first temperature sensor 106 monitors the refrigerant temperature at the compressor 101 inlet and calculates the system superheat in conjunction with the first pressure sensor 109. If the superheat is abnormal (too high / too low), it indicates that the electronic expansion valve 111 is improperly adjusted or that the system malfunctions. If a fault occurs, timely adjustment is required. The first pressure sensor 109 monitors the refrigerant pressure at the inlet of the compressor 101, reflecting the heat exchange efficiency and refrigerant charge of the first heat exchanger 103. If the pressure is too low, it may indicate insufficient refrigerant or frost on the first heat exchanger 103. The control system adjusts the opening of the electronic expansion valve 111 accordingly to ensure cooling efficiency. The second temperature sensor 107 monitors the refrigerant temperature at the outlet of the compressor 101 to determine if the refrigerant is overheated. If the temperature is too high, it may indicate overload or insufficient cooling of the compressor 101, preventing equipment damage. The pressure switch 117 serves as a safety protection device. When the second pressure sensor... When the pressure fed back by the device 110 exceeds the set upper limit, the power supply to the compressor 101 is automatically cut off to prevent high pressure from damaging the compressor 101, pipelines, and other components. The second pressure sensor 110 is used to monitor the high pressure of the refrigerant at the outlet of the compressor 101, reflecting the heat dissipation efficiency of the condenser 102 and whether the system is blocked. It provides pressure data to the control system for adjusting the operating status, such as adjusting the speed of the condenser fan 104 and the opening of the electronic expansion valve 111. The third temperature sensor 108 is used to provide real-time feedback of the refrigerant temperature, helping the controller to judge key states such as heat dissipation efficiency, system pressure, and refrigerant charge, so as to achieve dynamic adjustment and safety protection.

[0048] Specifically, the second temperature sensor 107 and the second pressure sensor 110 are located at the outlet of the compressor 101, the gas-liquid separator 116, the first temperature sensor 106 and the first pressure sensor 109 are located at the inlet of the compressor 101, and the electronic expansion valve 111 is located at the outlet of the condenser 102.

[0049] In this embodiment, the seawater refrigeration cycle system 200 further includes a seawater refrigeration cycle pipeline 202, which is connected to the compressor refrigeration cycle pipeline 105. A second heat exchanger 201 is disposed in the seawater refrigeration cycle pipeline 202 and is connected in parallel with the condenser 102.

[0050] In this embodiment, the seawater cooling circulation system 200 includes a first seawater circulation pipeline 203 and a third valve 304. The first valve 303, the third valve 304 and the second heat exchanger 201 are disposed in the first seawater circulation pipeline 203. The seawater inlet is formed in the first seawater circulation pipeline 203. The first seawater circulation pipeline 203 also has a seawater outlet. The third valve 304 is disposed near the seawater outlet. The first seawater circulation pipeline 203 and the seawater cooling circulation pipeline 202 exchange heat through the second heat exchanger 201.

[0051] It is worth noting that valves are used to cut off or connect pipelines.

[0052] In this embodiment, the seawater cooling circulation system 300 includes a second seawater circulation pipeline 302 and a fourth valve 305. The fourth valve 305, the third heat exchanger 301, and the second water pump 501 are disposed in the second seawater circulation pipeline 302. The second seawater circulation pipeline 302 is connected to the first seawater circulation pipeline 203. The second heat exchanger 201 and the third heat exchanger 301 are connected in parallel. The first seawater circulation pipeline 203 is also provided with a second valve 204.

[0053] Specifically, the second seawater circulation pipeline 302 is also connected to the third pressure sensor 307, the fourth pressure sensor 308, the sixth temperature sensor 309, and the filter device 306.

[0054] Specifically, the filter device 306 is located at the outlet of the first valve 303.

[0055] The filter device 306 is used to filter impurities in seawater to prevent impurities from entering the system and damaging the devices, clogging the pipes, or affecting heat exchange; the second water pump 501 is used to provide circulation power for the entire seawater system; the sixth temperature sensor 309 is used to monitor the temperature of the seawater; the third pressure sensor 307 and the fourth pressure sensor 308 are used to monitor whether there is any blockage in the seawater circulation system pipes, and can also monitor the operating status of the second water pump 501.

[0056] Specifically, the first seawater circulation pipeline 203 includes a first branch 2031, a second branch 2032, a third branch 2033, a fourth branch 2034, and a fifth branch 2035. A third valve 304 is located in the first branch 2031. A fourth pressure sensor 308 and a second water pump 501 are located in the second branch 2032. A second heat exchanger 201 and a second valve 204 are located in the third branch 2033. A filter device 306, a third pressure sensor 307, and a sixth pressure sensor are located in the fourth branch 2034. A first valve 303 is located in the fifth branch 2035. The second seawater circulation pipeline 302 includes a first branch 2031, a second branch 2032, a fourth branch 2034, a fifth branch 2035, and a sixth branch 3021. A third heat exchanger 301 and a fourth valve 305 are located in the sixth branch 3021.

[0057] In this embodiment, as Figure 9 As shown, the clean circulation system 500 includes a clean inlet branch 502, a clean outlet branch 503, a fifth valve 504, and a sixth valve 505. Both the clean inlet branch 502 and the clean outlet branch 503 are connected to the first seawater circulation pipeline 203. The fifth valve 504 is located on the clean inlet branch 502, and the sixth valve 505 is located on the clean outlet branch 503. The connection between the clean inlet branch 502 and the first seawater circulation pipeline 203 is located between the first valve 303 and the second heat exchanger 201. The connection between the clean outlet branch 503 and the first seawater circulation pipeline 203 is located between the second heat exchanger 201 and the third valve 304.

[0058] Specifically, the cleaning circulation system 500 includes a cleaning inlet branch 502, a fourth branch 2034, a third branch 2033, a second branch 2032, a sixth branch 3021, and a cleaning outlet branch 503.

[0059] In this embodiment, the cooling circulation system 400 includes a cooling circulation pipeline 408, a first water pump 401, a first heat exchanger 103, and a third heat exchanger 301 disposed in the cooling circulation pipeline 408, and at least two first water pumps 401 are disposed in parallel.

[0060] Specifically, the cooling circulation pipe 408 is also connected to the expansion tank 403, the fourth temperature sensor 404, and the safety valve 402.

[0061] The expansion tank 403 is a semi-enclosed design with a pressure-bearing bidirectional tank cover on top. When the system pressure reaches the set value, the tank cover operates. A liquid level sensor and a visual liquid level gauge are installed inside the tank to achieve functions such as pressure stabilization, fault alarm, water replenishment, and easy manual observation. The fourth temperature sensor 404 is used to monitor the inlet temperature of the cooling circulation system 400, and the fifth temperature sensor 405 is used to monitor the outlet temperature of the cooling circulation system 400. The temperature difference between the two is used to measure the system operating efficiency, load matching, and system stability. At the same time, the temperature of the fifth temperature sensor 405 is the key information that mainly determines the control of the total liquid cooling system.

[0062] It is worth noting that, such as Figure 5 As shown, in this embodiment, two first water pumps 401 are provided, and the two water pumps are respectively connected to the second one-way valve 406 and the third one-way valve 407.

[0063] The first water pump 401 is used to provide circulating power for the entire cooling system; the second check valve 406 and the third check valve 407 are used to prevent liquid backflow; and the safety valve 402 is used to ensure the pressure safety of the pipeline.

[0064] It is worth noting that in this embodiment, the first valve 303 to the sixth valve 505 are pneumatic butterfly valves.

[0065] Example 2

[0066] like Figures 10 to 14 The control method for a marine battery cooling system shown includes the following steps:

[0067] Step S10: Obtain the inlet temperature of condenser 102, the outlet temperature of third heat exchanger 301, and the outlet temperature of first valve 303.

[0068] Step S20: Select the mode of the marine battery cooling system based on the inlet temperature of the condenser 102, the outlet temperature of the third heat exchanger 301, and the outlet temperature of the first valve 303.

[0069] In step S10, the inlet temperature of the condenser 102 is monitored by the seventh temperature sensor 118, the outlet temperature of the third heat exchanger 301 is monitored by the fifth temperature sensor 405, and the outlet temperature of the first valve 303 is monitored by the sixth temperature sensor 309.

[0070] In step S20, when the inlet temperature of condenser 102 is < T2 and the outlet temperature of the third heat exchanger 301 is ≥ T1, the compressor refrigeration cycle system 100 is operated to exchange heat with the cooling cycle system 400, where T1 refers to the outlet temperature of the cooling cycle system 400 set according to user requirements, and T2 refers to the ambient temperature at the inlet of condenser 102; when the inlet temperature of condenser 102 is ≥ T2, the outlet temperature of the first valve 303 is ≥ T3, and the outlet temperature of the third heat exchanger 301 is ≥ T1, the seawater source refrigeration mode is operated to exchange heat with the cooling cycle system 400, where T3 refers to the outlet temperature threshold of the first valve 303 set by the user; when the inlet temperature of condenser 102 is ≥ T2, the outlet temperature of the first valve 303 is < T3, and the outlet temperature of the third heat exchanger 301 is ≥ T1, the seawater source water cooling mode is operated to exchange heat with the cooling cycle system 400.

[0071] In step S20, when the battery begins charging and discharging, the temperature monitoring process begins. First, the first water pump 401 starts to circulate the cooling system, and then the temperature value of the fifth temperature sensor 405 is judged. When the temperature monitored by the fifth temperature sensor 405 is <T1, the battery temperature has not reached the heat dissipation requirement, and the cooling system continues to circulate. When the temperature monitored by the fifth temperature sensor 405 is ≥T1, the temperature monitored by the sixth temperature sensor 309 is <T2, and the air source cooling mode is implemented. When the temperature monitored by the fifth temperature sensor 405 is ≥T1, the temperature monitored by the seventh temperature sensor 118 is ≥T2, and the temperature monitored by the sixth temperature sensor 309 is <T3, and the seawater source cooling mode is implemented. When the temperature monitored by the fifth temperature sensor 405 is ≥T1, the temperature monitored by the seventh temperature sensor 118 is ≥T2, and the temperature monitored by the sixth temperature sensor 309 is ≥T3, the seawater source cooling mode is implemented. During the process, the temperature monitoring process continuously monitors and is used by the system to select and switch the cooling mode.

[0072] Specifically, such as Figure 11As shown, when entering the air-source cooling mode, the first water pump 401 remains running, the first valve 303, the third valve 304, the fifth valve 504, and the sixth valve 505 are closed, and the second valve 204 and the fourth valve 305 are open. The compressor 101 and the fan start. During the cooling operation, the real-time temperature value of the fifth temperature sensor 405 is continuously monitored. When the temperature monitored by the fifth temperature sensor 405 is ≥ T1, the compressor 101 reduces its frequency; otherwise, the compressor 101 increases its frequency. Then, the second temperature sensor 107 and the second pressure sensor 110 monitor the temperature. Before use, the user specifies the set value of the refrigerant temperature at the outlet of the compressor 101 and the set value of the high-pressure refrigerant at the outlet of the compressor 101. If the temperature monitored by the second temperature sensor 107 is greater than the set value of the refrigerant temperature at the outlet of the compressor 101, or the pressure monitored by the second pressure sensor 110 is greater than the set value of the high-pressure refrigerant at the outlet of the compressor 101, the compressor 101 continuously reduces its frequency to ensure the safety of system operation, and then returns to the input temperature detection process.

[0073] Specifically, such as Figure 12 As shown, when entering the seawater source cooling mode, the first water pump 401 remains running, the first valve 303, the second valve 204 and the third valve 304 are open, and the fourth valve 305, the fifth valve 504 and the sixth valve 505 are closed. The second water pump 501 and the compressor 101 start, allowing seawater and refrigerant to circulate in the system. At this time, the real-time temperature value of the fifth temperature sensor 405 is monitored. When the temperature monitored by the fifth temperature sensor 405 is ≥ T1, the compressor 101 increases its frequency; otherwise, the compressor 101 decreases its frequency. Then, the second temperature sensor 107 and the second pressure sensor 110 monitor the temperature. If the temperature is greater than the set value, the compressor 101 continues to decrease its frequency, and then returns to the input temperature detection process.

[0074] Specifically, such as Figure 13 As shown, when entering the seawater source cooling mode, the first water pump 401 remains running, the first valve 303, the third valve 304 and the fourth valve 305 are open, the second valve 204, the fifth valve 504 and the sixth valve 505 are closed, the second water pump 501 starts, the temperature value of the fifth temperature sensor 405 is monitored in real time, the speed of the second water pump 501 is adjusted after judging the magnitude, and then the process returns to the input temperature detection process.

[0075] Specifically, such as Figure 14As shown, when entering cleaning mode, the second valve 204, the fourth valve 305, the fifth valve 504, and the sixth valve 505 are opened, while the first valve 303 and the third valve 304 are closed. First, the residual seawater in the pipeline is drained. The cleaning inlet and outlet are connected to the cleaning device, which injects cleaning agent into the pipeline. After the pipeline is full, the second water pump 501 is started. After continuous circulation for a certain period of time, the cleaning agent is discharged into a specific container. It must not be discharged into the sea to pollute the environment. After the cleaning agent in the pipeline is drained, pure water is injected and continuously circulated for a certain period of time. Then, the circulated pure water is discharged into a specific container, and the second valve 204 and the fourth valve 305 are closed, completing the pipeline cleaning.

[0076] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A control method for a marine battery cooling system, used to control the marine battery cooling system, characterized in that, The marine battery cooling system includes: a compressor (101), a condenser (102), a condenser fan (104), a first heat exchanger (103), a second heat exchanger (201), a third heat exchanger (301), a first water pump (401), and a second water pump (501). The condenser fan (104) is arranged opposite to the condenser (102). The compressor (101), the condenser (102), and the first heat exchanger (103) are connected and combined with the condenser fan (104) to form a compressor refrigeration cycle system (100). The first heat exchanger (103), the second heat exchanger (201), and the compressor (101) are connected to form a seawater refrigeration cycle system (200). The seawater refrigeration cycle system (200) has a seawater inlet. The seawater refrigeration cycle system (200) includes a first valve (303) located near the seawater inlet. The third heat exchanger (301) and the second water pump (501) are connected to form a seawater water cooling cycle system (300). The first heat exchanger (103), the third heat exchanger (301), and the first water pump (401) are connected to form a cooling cycle system (400). The operating modes of the marine battery cooling system include air source cooling mode, seawater source cooling mode and seawater source water cooling mode. When the marine battery cooling system is in the air source cooling mode, the compressor cooling cycle system (100) is turned on to exchange heat with the cooling cycle system (400). When the marine battery cooling system is in the seawater source cooling mode, the seawater cooling cycle system (200) is turned on to exchange heat with the cooling cycle system (400). When the marine battery cooling system is in the seawater source water cooling mode, the seawater water cooling cycle system (300) is turned on to exchange heat with the cooling cycle system (400). The control method for marine battery cooling systems includes the following steps: The inlet temperature of the condenser (102), the outlet temperature of the third heat exchanger (301), and the outlet temperature of the first valve (303) are obtained. The mode selection of the marine battery cooling system is controlled based on the inlet temperature of the condenser (102), the outlet temperature of the third heat exchanger (301), and the outlet temperature of the first valve (303). The steps include: When the inlet temperature of the condenser (102) is <T2 and the outlet temperature of the third heat exchanger (301) is ≥T1, the compressor refrigeration cycle system (100) is operated to exchange heat for the cooling cycle system (400), wherein T1 refers to the outlet temperature of the cooling cycle system (400) set according to the user's needs, and T2 refers to the ambient temperature at the inlet of the condenser (102); When the inlet temperature of the condenser (102) is ≥ T2, the outlet temperature of the first valve (303) is ≥ T3, and the outlet temperature of the third heat exchanger (301) is ≥ T1, the seawater source cooling mode is used to exchange heat for the cooling cycle system (400), wherein T3 refers to the user-set threshold temperature of the outlet temperature of the first valve (303). When the inlet temperature of the condenser (102) is ≥ T2, the outlet temperature of the first valve (303) is < T3, and the outlet temperature of the third heat exchanger (301) is ≥ T1, the seawater source cooling mode is used for heat exchange in the cooling circulation system (400).

2. The control method for a marine battery cooling system according to claim 1, characterized in that, The second water pump (501), the second heat exchanger (201), and the third heat exchanger (301) are connected to form a clean circulation system (500). The operating mode of the marine battery cooling system also includes a cleaning mode. When the marine battery cooling system is in the cleaning mode, the cleaning circulation system (500) is activated to clean the seawater cooling circulation system (200) and the seawater cooling circulation system (300).

3. The control method for a marine battery cooling system according to claim 2, characterized in that, The compressor refrigeration cycle system (100) includes a compressor refrigeration cycle pipeline (105), and the compressor (101), the condenser (102), and the first heat exchanger (103) are disposed in the compressor refrigeration cycle pipeline (105).

4. The control method for a marine battery cooling system according to claim 3, characterized in that, The seawater refrigeration cycle system (200) further includes a seawater refrigeration cycle pipeline (202), which is connected to the compressor refrigeration cycle pipeline (105). The second heat exchanger (201) is disposed in the seawater refrigeration cycle pipeline (202) and is connected in parallel with the condenser (102).

5. The control method for a marine battery cooling system according to claim 4, characterized in that, The seawater cooling circulation system (200) includes a first seawater circulation pipeline (203) and a third valve (304). The first valve (303), the third valve (304) and the second heat exchanger (201) are disposed in the first seawater circulation pipeline (203). The seawater inlet is formed in the first seawater circulation pipeline (203). The first seawater circulation pipeline (203) also has a seawater outlet. The third valve (304) is disposed near the seawater outlet. The first seawater circulation pipeline (203) and the seawater cooling circulation pipeline (202) exchange heat through the second heat exchanger (201).

6. The control method for a marine battery cooling system according to claim 5, characterized in that, The seawater cooling circulation system (300) includes a second seawater circulation pipeline (302) and a fourth valve (305). The fourth valve (305), the third heat exchanger (301), and the second water pump (501) are installed in the second seawater circulation pipeline (302). The second seawater circulation pipeline (302) is connected to the first seawater circulation pipeline (203). The second heat exchanger (201) is connected in parallel with the third heat exchanger (301). The first seawater circulation pipeline (203) is also equipped with a second valve (204).

7. The control method for a marine battery cooling system according to claim 6, characterized in that, The clean circulation system (500) includes a clean inlet branch (502), a clean outlet branch (503), a fifth valve (504), and a sixth valve (505). The clean inlet branch (502) and the clean outlet branch (503) are both connected to the first seawater circulation pipeline (203). The fifth valve (504) is located on the clean inlet branch (502), and the sixth valve (505) is located on the clean outlet branch (503). The connection point between the clean inlet branch (502) and the first seawater circulation pipeline (203) is located between the first valve (303) and the second heat exchanger (201), and the connection point between the clean outlet branch (503) and the first seawater circulation pipeline (203) is located between the second heat exchanger (201) and the third valve (304).

8. The control method for a marine battery cooling system according to any one of claims 1 to 7, characterized in that, The cooling circulation system (400) includes a cooling circulation pipeline (408), the first water pump (401), the first heat exchanger (103), and the third heat exchanger (301) are disposed in the cooling circulation pipeline (408), and at least two of the first water pumps (401) are connected in parallel.

Images