Marine environment energy storage battery desalting, dehumidifying and cooling integrated thermal management control method

Abstract

The invention belongs to the technical field of energy storage batteries, and particularly relates to a desalting, dehumidifying and cooling integrated heat management control method for a marine environment energy storage battery, and the control method is applied to a desalting, dehumidifying and cooling integrated heat management device for the marine environment energy storage battery. The heat management device comprises an energy storage battery module, an air inlet dehumidification and desalination module, a return air reprocessing module, a salt crystallization and separation module, a cold source heat exchanger, a heat source heat exchanger and a sensor module, and the priorities of functions such as temperature control and battery cabin dehumidification of the energy storage battery module and air supply and desalination of the energy storage battery module are set. Cooling, dehumidification and desalination integrated heat management of the marine environment energy storage battery is achieved, and the reliability, safety and stability of operation of an energy storage system are guaranteed.

Description

Technical Field

[0001] This application belongs to the field of energy storage battery technology, and specifically relates to an integrated thermal management and control method for desalination, dehumidification and cooling of marine environment energy storage batteries. Background Technology

[0002] The summer climate in my country's coastal ports and deep-sea areas is characterized by high temperature, high humidity, and high salinity. As a result, energy storage battery systems are increasingly being used in energy storage devices for offshore wind and solar power generation systems. The high temperature, high salinity, and high humidity environment threatens battery heat dissipation, condensation on battery equipment, and aging of the battery's metal and non-metal components, affecting its safe and reliable operation and service life. High humidity and high salinity environments also greatly promote corrosion.

[0003] Therefore, there is an urgent need to provide a thermal management control method for marine environmental energy storage batteries that integrates desalination, dehumidification, and cooling, and can achieve integrated thermal management control of cooling, dehumidification, and desalination.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0005] To overcome the aforementioned problems in the prior art, this application provides an integrated thermal management control method for desalination, dehumidification, and cooling of marine environmental energy storage batteries. This control method is applied to an integrated thermal management device for desalination, dehumidification, and cooling of marine environmental energy storage batteries. The thermal management device includes: an energy storage battery module, an inlet dehumidification and desalination module, a return air reprocessing module, a salt crystallization and precipitation module, a cold source heat exchanger, a heat source heat exchanger, and a sensor module. Priorities are set for functions such as temperature control of the energy storage battery module, dehumidification of the battery compartment, and air supply desalination of the energy storage battery module. This achieves integrated thermal management of cooling, dehumidification, and desalination of marine environmental energy storage batteries, ensuring the reliability, safety, and stability of the energy storage system.

[0006] In some embodiments of this application, an integrated thermal management control method for desalination, dehumidification, and cooling of marine environment energy storage batteries is provided. The control method is applied to an integrated thermal management device for desalination, dehumidification, and cooling of marine environment energy storage batteries. The thermal management device includes: an energy storage battery module, an air inlet dehumidification and desalination module, a return air reprocessing module, a salt crystallization and precipitation module, a cold source heat exchanger, a heat source heat exchanger, and a sensor module. The control method includes: prioritizing the temperature of the energy storage battery module by first changing the gas volume flow rate on the air inlet side of the dehumidification and desalination module; when the flow rate is increased to its maximum value and the temperature of the energy storage battery module still does not meet the target value, calculating the required cooling capacity and verifying whether the average temperature of the energy storage battery module is within the target temperature range; if it is, determining the humidity inside the energy storage battery module; if the humidity is not met, calculating the dehumidification capacity; when the humidity inside the energy storage battery module is controlled to the target humidity, desalination control can be initiated, controlling the conductivity of the first solution to keep it within a preset range.

[0007] In some embodiments of this application, the sensor module includes: The first temperature sensor is used to acquire the temperature on the air inlet side of the air intake module for dehumidification and desalination, denoted as t. in ; The second temperature sensor is used to acquire the temperature on the air outlet side of the air intake dehumidification and desalination module, which is also the temperature on the air intake side of the energy storage battery module, denoted as T. in ; The third temperature sensor is used to obtain the average temperature of the energy storage battery module, denoted as T. b ; The fourth temperature sensor is used to obtain the temperature at the air outlet of the energy storage battery module, denoted as T. out ; A gas flow sensor is used to acquire the gas volumetric flow rate on the inlet side of the inlet air dehumidification and desalination module, denoted as m. air,in ; The first humidity sensor is used to acquire the relative humidity on the air inlet side of the air intake module for dehumidification and desalination, denoted as φ. in ; The second humidity sensor is used to acquire the relative humidity on the outlet side of the intake air dehumidification and desalination module, denoted as φ. out ; The third humidity sensor is used to obtain the relative humidity inside the energy storage battery module, denoted as φ. b ; The first conductivity sensor is used to obtain the conductivity of the first solvent in the first solution collection chamber at the bottom of the dehumidification and desalination module, denoted as δ1; The second conductivity sensor is used to obtain the conductivity of the second solution in the second solution collection chamber at the bottom of the return air reprocessing module, denoted as δ2. The third conductivity sensor is used to obtain the conductivity of the solution in the salt crystallization precipitation module, denoted as δ3.

[0008] In some embodiments of this application, the thermal management control method specifically includes: Step 1: Battery thermal balance calculation Obtain the average temperature T of the energy storage battery moduleb When T b When the temperature is below a preset threshold, calculate the heat generation Q of the energy storage battery module. b : ; ; in, For the specific heat capacity of the energy storage battery module, M b For the quality of energy storage battery modules, T represents the specific heat capacity of air in the energy storage battery module. set The target temperature for the energy storage battery module. The heat carried away by the air intake of the energy storage battery module; control Unchanged, improved The temperature of the energy storage battery module is measured. If it reaches T... set Jump to the next priority relative humidity determination and control step; if the set temperature T is not reached. set ,conduct Reduce calculations, i.e., calculate cooling capacity; Step 2: Calculation of Cooling Capacity when Set to the maximum value m in, max If the battery temperature of the energy storage battery module still cannot be controlled at the target value, then it is necessary to calculate the cooling capacity and determine the theoretical calculated setpoint T for the air intake side of the energy storage battery module. in, set Then perform the following calculations; Calculate the saturated water vapor pressure of the air on the intake side of the intake air dehumidification and desalination module: ; Calculate the saturated water vapor pressure of the air on the outlet side of the intake air dehumidification and desalination module: ; Calculate the actual water vapor pressure of the air on the intake side of the intake air dehumidification and desalination module: ; Calculate the actual water vapor pressure of the air on the outlet side of the intake air dehumidification and desalination module: ; Calculate the actual moisture content of the air on the intake side of the intake air dehumidification and desalination module: Where P is standard atmospheric pressure; Calculate the actual moisture content of the air at the outlet side of the intake air dehumidification and desalination module: Where P is standard atmospheric pressure; Calculate the enthalpy of the air on the intake side of the intake air dehumidification and desalination module: ; in, For the density of air, The specific heat capacity of air; Calculate the enthalpy of the air on the outlet side of the intake air dehumidification and desalination module: ; When T in The set temperature T on the air intake side of the energy storage battery module in set At that time, the cooling capacity is obtained, which consists of two parts: latent heat and sensible heat, calculated as follows: ; ; ; After confirming the cooling capacity, adjustments are made to achieve the required cooling capacity. And verify the average temperature T of the energy storage battery module. b If the target temperature range is met, the temperature control program of the energy storage battery module will be exited and the humidity control of the energy storage battery module, which is the second priority, will be entered. Step 3: Calculation of Dehumidification Capacity When the relative humidity φ inside the energy storage battery module b Greater than the set threshold φ b set Calculate the dehumidification capacity: ; Humidity control should be performed according to the required dehumidification capacity.

[0009] In some embodiments of this application, the thermal management control method further includes desalination control, wherein the conductivity of the first solution in the first solution collecting chamber is... And 0.002 μS / cm ≤0.08μS / cm; conductivity of the second solution in the second solution collecting chamber And 0.1 μS / cm ≤0.5μS / cm; where, when When the value is greater than 0.08 μS / cm, i.e., the first preset value, the first solution flows through the salt crystallization precipitation module, causing salt crystals to precipitate and ensuring... Within the preset range; when When the concentration is below 0.002 μS / cm, i.e., the second preset value, the concentration of the first solution is adjusted using the second solution to ensure... Within the preset range; when If the value is higher than 0.5 μS / cm, adjust the concentration of the second solution to ensure it is within the preset range.

[0010] In some embodiments of this application, in step two, the evaporation temperature of the cold source heat exchanger is adjusted to regulate the cooling capacity. When the cold source heat exchanger is the evaporator of an air conditioning system, the cooling capacity is adjusted by regulating the speed of the compressor in the air conditioning system, and / or the opening of the electronic expansion valve, and / or the speed of the evaporator fan, and / or the flow rate of the first solution.

[0011] In some embodiments of this application, in step three, the dehumidification capacity is controlled by using the cold source heat exchanger as an evaporator and by activating the dehumidification mode of the air conditioning system.

[0012] In some embodiments of this application, in step one, the preset temperature threshold is 35°C; in step two, the target temperature range is 20-30°C; in step three, the threshold φ b set The RH level is 25-35%.

[0013] In some embodiments of this application, the air volume is controlled by the fan of the second evaporator of the air conditioning system, with the maximum speed set to 12,000 rpm.

[0014] In some embodiments of this application, the thermal management device specifically includes: An energy storage battery module, which includes an energy storage battery pack, a dehumidification interlayer between batteries, and an energy storage battery inlet and outlet air duct; The air intake dehumidification and desalination module includes a first shell-and-tube spray heat exchanger to allow direct heat exchange between the intake air and the spray solution. The cavity of the first shell-and-tube spray heat exchanger is divided into three sections longitudinally, from top to bottom: a first solution spray chamber, a first solution-intake air heat exchange section, and a first solution collection chamber. The first solution spray chamber is provided with multiple first solution nozzles, and the bottom of the first solution collection chamber is provided with three outlets, namely the first outlet, the second outlet, and the third outlet. The spraying process of the first solution dissolves the salt in the intake air, and the condensation temperature of the moisture in the intake air decreases, thereby achieving the purpose of desalination, cooling, and dehumidification of the intake air. A cold source heat exchanger, wherein the first end of the cold source heat exchanger is connected to the first solution nozzle at the upper end of the first shell-and-tube spray heat exchanger via a pipe, and the second end of the cold source heat exchanger is connected to the first outlet of the first solution collection chamber via a pipe; the cold source heat exchanger is used to exchange heat with the first solution to cool the first solution. The salt crystallization precipitation module includes a salt crystallization precipitation device. Its first end is connected to the pipe between the cold source heat exchanger and the first outlet through a pipe, and a three-way valve is installed at the connection point. The second end is connected to the second outlet of the first solution collection chamber through a pipe. By switching the three-way valve, the first solution flowing out of the first outlet is guided to the salt crystallization precipitation device, and the desalted solution flows into the first solution collection chamber through the second outlet. The return air reprocessing module includes a second shell-and-tube spray heat exchanger. The cavity of the second shell-and-tube spray heat exchanger is divided into three parts from top to bottom: the upper section is the second solution spray chamber, the middle section is the second solution-return air heat exchange section, and the lower section is the second solution collection chamber. The second solution spray chamber is provided with multiple second solution nozzles. The bottom of the lower section of the second solution collection chamber is provided with a fourth outlet and a fifth outlet. The fourth outlet is connected to the third outlet through a pipe and is used for adjusting the concentration of the first solution. A heat source heat exchanger, wherein the first end of the heat source heat exchanger is connected to the second solution nozzle at the upper end of the second shell-and-tube spray heat exchanger via a pipe, and the second end of the heat source heat exchanger is connected to the fifth outlet of the second solution collection chamber via a pipe; the heat source heat exchanger is used to exchange heat with the second solution to raise the temperature of the second solution.

[0015] In some embodiments of this application, the cold source heat exchanger exchanges heat with the evaporator of the air conditioning system, the heat source heat exchanger exchanges heat with the condenser of the air conditioning system, and the air conditioning system includes a refrigerant circulation loop in which the refrigerant circulates in sequence, consisting of a compressor, a condenser, an electronic expansion valve, and an evaporator.

[0016] Compared with the prior art, this application has at least the following technical effects: (1) The thermal management control method of this application sets the priority of functions such as temperature control of the energy storage battery module, dehumidification of the battery compartment, and air supply and desalination of the energy storage battery module. It realizes integrated thermal management of cooling, dehumidification and desalination of marine environment energy storage batteries, and ensures the reliability, safety and stability of the energy storage system operation.

[0017] (2) The thermal management device used in the control method of this application can realize the battery air cooling and dehumidification functions: by using the first solution to spray the sea breeze to cool it down, the temperature of the sea breeze is reduced, the saturated vapor pressure of the sea breeze air is reduced, and the water vapor of the sea breeze air is condensed and collected.

[0018] (3) The thermal management device used in the control method of this application can realize the desalination function of the energy storage battery module, avoid metal corrosion and shorten the service life of non-metals, and combine with dehumidification to avoid short circuits and safety problems caused by the conduction of salt water.

[0019] (4) The thermal management device used in the control method of this application can make full use of the same ion dissolution effect of the first solution. At the same temperature, the ion concentration in the solution is lower than the salt spray ion concentration in the air, so as to dissolve the salt spray ions in the sea breeze air and achieve the purpose of desalination of the sea breeze air.

[0020] (5) The thermal management device used in the control method of this application can ensure the balance of the water and salt concentration of the first solution: In the air intake dehumidification and desalination module, the concentration of the first solution in the first solution collection chamber will fluctuate. Firstly, water vapor in the sea breeze condenses and falls back into the first solution collection chamber under the action of neutrality. When the concentration is lower than the set lower limit value (concentration corresponds one-to-one with conductivity), the concentration of the first solution is adjusted by the second solution. Secondly, it absorbs and dissolves salt mist ions in the sea breeze and falls back into the first solution collection chamber under the action of gravity. This causes the concentration of the first solution to increase. When the concentration is higher than the set upper limit value, the salt crystallization precipitation module is used to precipitate and crystallize to reduce the concentration.

[0021] (6) The thermal management device applicable to the control method of this application can utilize the waste heat of the battery outlet air in the first solution water salt concentration balance: in the second solution, the second solution is heated by a heat source, and in order to save energy, the battery outlet air waste heat is used to further increase its temperature, thereby increasing the partial pressure of water vapor in the outlet air, dissolving water in the second solution during the exchange process, and increasing the concentration of the second solution; this process utilizes the battery return air to save energy. Attached Figure Description

[0022] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the thermal management device in some embodiments of this application. Figure 1 ; Figure 2 This is a schematic diagram of the thermal management device in some embodiments of this application. Figure 2 ; Figure 3 This is a schematic diagram of the thermal management device in some embodiments of this application. Figure 3 ; Figure 4 This is a schematic diagram of the thermal management device in some embodiments of this application. Figure 4 ; Figure 5 This is a schematic diagram of the thermal management device in some embodiments of this application. Figure 5 ; Among them, 100-energy storage battery module, 101-energy storage battery pack, 102-battery room dehumidification interlayer, 103-air inlet dehumidification and desalination module, 104-first solution spray chamber, 105-first solution-air inlet heat exchange section chamber, 106-first solution collection chamber, 107-first outlet, 108-second outlet, 109-third outlet, 110-first pump body, 111-three-way valve, 112-cold source heat exchanger, 113-cold source, 114-cold source and first solution heat exchanger Thermal circulation, 115-Sea breeze, 116-Processed sea breeze, 117-First solution nozzle, 118-Salt crystallization precipitation module, 119-Stirring component, 120-Fourth pump body, 121-Return air reprocessing module, 122-Second solution spray chamber, 123-Second solution-return air heat exchange section chamber, 124-Second solution collection chamber, 125-Second solution nozzle, 126-Fourth outlet, 127-Fifth outlet, 128-Third pump body, 129-Heat source heat exchanger. 130 - Heat source; 131 - Heat exchange cycle between heat source and second solution; 132 - Battery module exhaust air; 133 - Air carrying water vapor; 134 - Second pump body; 201 - Compressor; 202 - Condenser; 203 - Electronic expansion valve; 204 - Evaporator; 205 - Second evaporator; 301 - First temperature sensor; 302 - Second temperature sensor; 303 - Third temperature sensor; 304 - Fourth temperature sensor; 401 - Gas flow sensor; 501 - First humidity sensor; 502 - Second humidity sensor; 503 - Third humidity sensor; 601 - First conductivity sensor; 602 - Second conductivity sensor; 603 - Third conductivity sensor. Detailed Implementation

[0024] The technical solution of this application will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are some embodiments of this application, but not all embodiments, and are only used to illustrate this application, and should not be regarded as limiting the scope of this application.

[0025] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, 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 pertains.

[0026] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and for simplification, 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 this application. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in practical applications, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0028] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0029] In the embodiments of this application, the words "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0030] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0031] The following examples, in conjunction with the accompanying drawings, illustrate the concepts. Figures 1-5 This application will be described in further detail.

[0032] In some embodiments of this application, an integrated thermal management control method for desalination, dehumidification, and cooling of marine environment energy storage batteries is provided. The control method is applied to an integrated thermal management device for desalination, dehumidification, and cooling of marine environment energy storage batteries. The thermal management device includes: an energy storage battery module 100, an air inlet dehumidification and desalination module 103, a return air reprocessing module 121, a salt crystallization and precipitation module, a cold source heat exchanger 112, a heat source heat exchanger 129, and a sensor module. The control method includes: prioritizing the temperature of the energy storage battery module 100 by first changing the gas volume flow rate on the air inlet side of the air inlet dehumidification and desalination module 103; when the flow rate increases to its maximum value, if the temperature of the energy storage battery module 100 still does not meet the target value, calculating the required cooling capacity and verifying whether the average temperature of the energy storage battery module 100 is within the target temperature range; if it is, determining the humidity inside the energy storage battery module 100; if the humidity is not met, calculating the dehumidification capacity; when the humidity inside the energy storage battery module 100 is controlled to the target humidity, desalination control can be initiated, controlling the conductivity of the first solution to keep it within a preset range.

[0033] In some embodiments of this application, the sensor module includes: The first temperature sensor 301 is used to acquire the temperature on the air inlet side of the air inlet dehumidification and desalination module 103, denoted as t. in ; The second temperature sensor 302 is used to acquire the temperature on the air outlet side of the air intake dehumidification and desalination module 103, which is also the temperature on the air intake side of the energy storage battery module 100, denoted as T. in ; The third temperature sensor 303 is used to obtain the average temperature of the energy storage battery module 100, denoted as T. b ; The fourth temperature sensor 304 is used to acquire the temperature at the air outlet of the energy storage battery module 100, denoted as T. out ; Gas flow sensor 401 is used to acquire the gas volumetric flow rate on the inlet side of the inlet air dehumidification and desalination module 103, denoted as m. air,in ; The first humidity sensor 501 is used to acquire the relative humidity on the air inlet side of the air inlet dehumidification and desalination module 103, denoted as φ. in ; The second humidity sensor 502 is used to acquire the relative humidity on the outlet side of the air intake dehumidification and desalination module 103, denoted as φ. out ; The third humidity sensor 503 is used to acquire the relative humidity inside the energy storage battery module 100, denoted as φ. b ; The first conductivity sensor 601 is used to obtain the conductivity of the first solvent in the first solution collection chamber 106 at the bottom of the dehumidification and desalination module, denoted as δ1; The second conductivity sensor 602 is used to obtain the conductivity of the second solution in the second solution collection chamber 124 at the bottom of the return air reprocessing module 121, denoted as δ2. The third conductivity sensor 603 is used to obtain the conductivity of the solution in the salt crystallization precipitation module, denoted as δ3.

[0034] In some embodiments of this application, the thermal management control method specifically includes: Step 1: Battery thermal balance calculation Obtain the average temperature T of the energy storage battery module 100 b When T b When the temperature is below a preset threshold, calculate the heat generation Q of the energy storage battery module 100. b : ; ; in, M is the specific heat capacity of the energy storage battery module 100. b For the mass of energy storage battery module 100, T represents the specific heat capacity of air in the energy storage battery module 100. set The target temperature for the energy storage battery module 100, The heat carried away by the air intake of the energy storage battery module 100; control Unchanged, improved Perform temperature checks on the energy storage battery module 100. If the temperature reaches T... set Jump to the next priority relative humidity determination and control step; if the set temperature T is not reached. set ,conduct Reduce calculations, i.e., calculate cooling capacity; Step 2: Calculation of Cooling Capacity when Set to the maximum value m in, max If the battery temperature of the energy storage battery module 100 still cannot be controlled at the target value, then it is necessary to calculate the cooling capacity and determine the theoretical calculated setpoint T on the air intake side of the energy storage battery module 100. in, set Then perform the following calculations; Calculate the saturated water vapor pressure of the air on the intake side of the intake air dehumidification and desalination module 103: ; Calculate the saturated water vapor pressure of the air on the outlet side of the intake air dehumidification and desalination module 103: ; Calculate the actual water vapor pressure of the air on the intake side of the intake air dehumidification and desalination module 103: ; Calculate the actual water vapor pressure of the air on the outlet side of the intake air dehumidification and desalination module 103: ; Calculate the actual moisture content of the air on the intake side of the intake air dehumidification and desalination module 103: Where P is standard atmospheric pressure; Calculate the actual moisture content of the air on the outlet side of the intake air dehumidification and desalination module 103: Where P is standard atmospheric pressure; Calculate the enthalpy of the air on the intake side of the intake air dehumidification and desalination module 103: ; in, For the density of air, The specific heat capacity of air; Calculate the enthalpy of the air on the outlet side of the intake air dehumidification and desalination module 103: ; When T in The set temperature T on the air inlet side of the energy storage battery module 100 in set At that time, the cooling capacity is obtained, which consists of two parts: latent heat and sensible heat, calculated as follows: ; ; ; After confirming the cooling capacity, adjustments are made to achieve the required cooling capacity. And verify the average temperature T of the energy storage battery module 100. b If the temperature is within the target temperature range, then exit the temperature control program of the energy storage battery module 100 and enter the humidity control of the energy storage battery module 100 with the second priority. Step 3: Calculation of Dehumidification Capacity When the relative humidity φ inside the energy storage battery module 100 b Greater than the set threshold φ b set Calculate the dehumidification capacity: ; Humidity control should be performed according to the required dehumidification capacity.

[0035] In some embodiments of this application, the thermal management control method further includes desalination control, wherein the conductivity of the first solution in the first solution collecting chamber 106 is... And 0.002 μS / cm ≤0.08μS / cm; conductivity of the second solution in the second solution collecting chamber 124 And 0.1 μS / cm ≤0.5μS / cm; where, when When the value is greater than 0.08 μS / cm, i.e., the first preset value, the first solution flows through the salt crystallization precipitation module, causing salt crystals to precipitate and ensuring... Within the preset range; when When the concentration is below 0.002 μS / cm, i.e., the second preset value, the concentration of the first solution is adjusted using the second solution to ensure... Within the preset range; when If the value is higher than 0.5 μS / cm, adjust the concentration of the second solution to ensure it is within the preset range.

[0036] In some embodiments of this application, in step two, the evaporation temperature of the cold source heat exchanger 112 is adjusted to regulate the cooling capacity. When the cold source heat exchanger 112 is the evaporator 204 of an air conditioning system, the cooling capacity is adjusted by regulating the speed of the compressor 201 in the air conditioning system, and / or the opening degree of the electronic expansion valve 203, and / or the speed of the evaporator 204 fan, and / or the flow rate of the first solution.

[0037] In some embodiments of this application, in step three, the dehumidification capacity is controlled by using the cold source heat exchanger 112 as the evaporator 204, and the dehumidification mode of the air conditioning system is activated for control.

[0038] In some embodiments of this application, in step one, the preset temperature threshold is 35°C; in step two, the target temperature range is 20-30°C; in step three, the threshold φ b set The RH level is 25-35%.

[0039] In some embodiments of this application, the air volume is controlled by the fan of the second evaporator of the air conditioning system, with the maximum speed set to 12,000 rpm.

[0040] In some embodiments of this application, taking the maritime city of Qingdao as an example, the battery module of the marine platform energy storage power station has a specific heat capacity of 1050 kJ / (kg·℃), a battery system mass of 3000 kg, an average battery system temperature of 30℃, and the battery module operates at a 1C discharge power. If the temperature drops to 20℃ within 5 minutes...

[0041] Summer ocean air temperature, i.e., the temperature on the air inlet side of the intake dehumidification and desalination module 103, t in =28℃, summer marine air humidity, i.e., the relative humidity on the air inlet side of the air intake dehumidification and desalination module 103, φ in=90%RH, the gas volumetric flow rate on the inlet side of the intake dehumidification and desalination module 103 under summer marine air conditions is 4000 m³ / h. 3 / h, then m in,max = ×4000m 3 / h / 3600 kg / s, the density of air at the ocean surface is 1.03 kg / m³. 3 Its specific heat capacity is 1.01 kJ / (kg·℃).

[0042] According to the battery thermal balance calculation in step one The battery generates heat as 105kW.

[0043] According to the battery thermal balance calculation in step one At this time Increase to the maximum value m in,max =4000m 3 / h, without turning on the intake air dehumidification and desalination module 103, under natural air intake T in =t in =28℃, unable to lower the battery temperature to the set value =20℃; therefore, it is determined that the air intake dehumidification and desalination module 103 should be turned on.

[0044] Based on the cooling capacity calculation in step two, the specific details are as follows: Based on the calculation of cooling capacity in step two, the saturated water vapor pressure of the air on the intake side of the intake air dehumidification and desalination module is calculated. Actual water vapor pressure of the air on the intake side of the air intake dehumidification and desalination module: Calculate the actual moisture content of the air on the intake side of the intake air dehumidification and desalination module: Where P is standard atmospheric pressure, calculate the enthalpy of the air on the intake side of the intake air dehumidification and desalination module: in, For the density of air, Given the specific heat capacity of air, the density of air at the ocean surface is 1.03 kg / m³. 3 The specific heat capacity is assumed to be 1.01 kJ / (kg·℃). The temperature on the inlet side of the inlet air dehumidification and desalination module 103 is t. in =28℃, relative humidity, φ in =90%RH; Calculated saturated water vapor pressure on the air inlet side of air intake dehumidification and desalination module 103. The actual water pressure is 3.774 kPa. 3.396 kPa, enthalpy-humidity It is 21.6 g / kg, enthalpy value It is 83.21 kJ / kg.

[0045] Based on the saturated water vapor pressure of the air on the outlet side of the intake air dehumidification and desalination module in step two of the cooling capacity calculation: Calculate the actual water vapor pressure of the air on the outlet side of the intake air dehumidification and desalination module: The actual moisture content of the air on the outlet side of the intake dehumidification and desalination module: Where P is standard atmospheric pressure; the density of air at the ocean surface is assumed to be 1.3 kg / m³. 3 Assuming a specific heat capacity of 1.01 kJ / (kg·℃), the enthalpy of the air at the outlet side of the inlet dehumidification and desalination module is: The enthalpy and humidity of the air outlet side of the intake air dehumidification and desalination module were calculated. 3.15 g / kg, enthalpy value It is 21.6 kJ / kg.

[0046] When T in The set temperature T on the air intake side of the energy storage battery module in set At 15℃, ; ; = =26kg / s.

[0047] In some embodiments of this application, the thermal management device includes: The energy storage battery module 100 includes an energy storage battery pack 101, a battery compartment dehumidification interlayer 102, and an energy storage battery inlet and outlet air duct. The air intake dehumidification and desalination module 103 includes a first shell-and-tube spray heat exchanger to allow direct heat exchange between the intake air and the spray solution. The cavity of the first shell-and-tube spray heat exchanger is divided into three sections longitudinally, from top to bottom: a first solution spraying chamber 104, a first solution-intake air heat exchange section 105, and a first solution collecting chamber 106. The first solution spraying chamber 104 is provided with multiple first solution nozzles 117, and the bottom of the first solution collecting chamber 106 is provided with three outlets: a first outlet 107, a second outlet 108, and a third outlet 109. The spraying process of the first solution dissolves the salt in the intake air, and the condensation temperature of the moisture in the intake air decreases, thereby achieving the purpose of desalination, cooling, and dehumidification of the intake air. A cold source heat exchanger 112 is provided, with its first end connected to the first solution nozzle 117 at the upper end of the first shell-and-tube spray heat exchanger via a pipe, and its second end connected to the first outlet 107 of the first solution collection chamber 106 via a pipe. The cold source heat exchanger 112 is used to exchange heat with the first solution to cool the first solution. The salt crystallization precipitation module 118 includes a salt crystallization precipitation device. Its first end is connected to the cold source heat exchanger 112 and the first outlet 107 through a pipe, and a three-way valve 111 is provided at the connection. Its second end is connected to the second outlet 108 of the first solution collection chamber 106 through a pipe. By switching the three-way valve 111, the first solution flowing out of the first outlet 107 is guided to the salt crystallization precipitation device, and the desalted solution flows into the first solution collection chamber 106 through the second outlet 108. The return air reprocessing module 121 includes a second shell-and-tube spray heat exchanger. The cavity of the second shell-and-tube spray heat exchanger is divided into three parts from top to bottom: the upper section is the second solution spray cavity 122, the middle section is the second solution-return air heat exchange section cavity 123, and the lower section is the second solution collection cavity 124. The second solution spray cavity 122 is provided with a plurality of second solution nozzles 125. The bottom of the lower section of the second solution collection cavity 124 is provided with a fourth outlet 126 and a fifth outlet 127. The fourth outlet 126 is connected to the third outlet 109 through a pipe and is used for adjusting the concentration of the first solution. The heat source heat exchanger 129 has its first end connected to the second solution nozzle 125 at the upper end of the second shell-and-tube spray heat exchanger via a pipe, and its second end connected to the fifth outlet 127 of the second solution collection chamber 124 via a pipe. The heat source heat exchanger 129 is used to exchange heat with the second solution to raise the temperature of the second solution.

[0048] In some embodiments of this application, the salt crystallization precipitation device is further provided with a stirring component 119 for stirring to accelerate the precipitation of salt. When salt crystallizes and precipitates on the stirring component 119, the stirring component is removed by opening the cover of the salt crystallization precipitation device for desalination. The desalted solution can flow into the first solution collection chamber 106 through the second outlet 108.

[0049] In some embodiments of this application, a first valve and a first pump body 110 are provided on the pipeline connecting the first outlet 107 and the three-way valve 111; a second valve and a second pump body 134 are provided on the pipeline connecting the fourth outlet 126 and the third outlet 109; a third valve and a third pump body 128 are provided on the pipeline connecting the fifth outlet 127 and the heat source heat exchanger 129. The first valve, the second valve, and the third valve are used to control the on / off state of their respective pipelines, and the first pump body 110, the second pump body 134, and the third pump body 128 are used to control the solution flow rate of their respective pipelines.

[0050] In some embodiments of this application, the cold source heat exchanger 112 exchanges heat with the cold source 113 to form a cold source and first solution heat exchange cycle 114; the heat source heat exchanger 129 exchanges heat with the heat source 130 to form a heat source and second solution heat exchange cycle 131.

[0051] In some embodiments of this application, the cold source heat exchanger 112 exchanges heat with the evaporator 204 of the air conditioning system, and the heat source heat exchanger 129 exchanges heat with the condenser 202 of the air conditioning system. The air conditioning system includes a refrigerant circulation loop, in which the refrigerant circulates in the refrigerant circulation loop consisting of a compressor 201, a condenser 202, an electronic expansion valve 203, and an evaporator 204 in sequence.

[0052] In some embodiments of this application, the evaporator 204 includes a first evaporator and a second evaporator 205 arranged in parallel in the refrigerant circulation loop; the first evaporator exchanges heat with the cold source heat exchanger 112; along the airflow direction, the second evaporator 205 is located upstream of the air inlet dehumidification and desalination module 103, the air inlet first flows through the second evaporator 205 for first-stage cooling and dehumidification treatment, and then flows through the air inlet dehumidification and desalination module 103. The two-stage cooling and dehumidification is suitable for heat dissipation of energy storage batteries in high-humidity, high-temperature, and deep-sea areas.

[0053] In some embodiments of this application, the cold source heat exchanger 112 uses marine air cooling to cool the first solution; the heat source heat exchanger 129 uses a marine photovoltaic collector for heating to heat the second solution.

[0054] In some embodiments of this application, the first solution and the second solution are one or more of LiCl, BrCl, KCl, and NaCl solutions, and the salt concentration in the first solution is less than the salt concentration in Haifeng 115; the salt concentration in the second solution is greater than the salt concentration in Haifeng 115.

[0055] In some embodiments of this application, the concentration of NaCl in the first solution is less than the concentration of NaCl in Haifeng 115; the concentration of NaCl in the second solution is greater than the concentration of NaCl in Haifeng 115.

[0056] In some embodiments of this application, the first solution passes through the first pump body 110 and the three-way valve 111, enters the cold source heat exchanger 112 for heat exchange, and the cooled first solution is then sprayed out through the first solution nozzle 117 to achieve dehumidification, cooling and desalination of the sea breeze 115. After treatment, the sea breeze 116 exchanges heat with the energy storage battery pack 101 through the energy storage battery inlet and outlet air duct. The first solution dissolves the salt in the sea breeze 115 in the spray to achieve desalination, and at the same time cools the sea breeze 115. After cooling, the water vapor partial pressure of the sea breeze 115 decreases, water vapor condenses, and the air humidity decreases, thus achieving the purpose of dehumidification and cooling.

[0057] In some embodiments of this application, during the spraying of the first solution, the concentration of the first solution changes, and the concentration balance of the first solution is maintained by the second solution through the salt crystallization precipitation module 118 and the fourth outlet 126.

[0058] In some embodiments of this application, when the conductivity of the first solution in the first solution collecting chamber 106 is... When the value exceeds the first preset value, the solution is switched by the three-way valve 111 to induce the solution to enter the salt crystallization precipitation device. The salt precipitation is accelerated by the stirring component 119. The crystallized salt is precipitated on the stirring component 119. The salt is desalted by opening the cover of the salt crystallization precipitation device. The desalted first solution flows into the first solution collection chamber 106 through the second outlet 108.

[0059] In some embodiments of this application, a fourth valve and a fourth pump body 120 are also provided on the pipeline connecting the second end of the salt crystallization precipitation device to the second outlet 108, for controlling the opening and closing of this pipeline and the flow rate of the solution.

[0060] In some embodiments of this application, when the conductivity of the first solution in the first solution collecting chamber 106 is... When the concentration is less than the second preset value, the return air reprocessing module 121 is used to achieve the concentration balance of the first solution. The second solution enters the heat source heat exchanger 129 through the fifth outlet 127 under the action of the third pump body 128. After the second solution is heated, it flows into the cavity of the second shell and tube spray heat exchanger for spraying. At this time, the battery module exhaust air 132 flowing through the energy storage battery module 100 absorbs the heat of the energy storage battery pack 101. Due to the increase in temperature, the water vapor it can carry increases. During the process of spraying and heat exchange with the second solution, it absorbs the water in the second solution and becomes air 133 carrying water vapor, which is discharged into the environment. The concentration of the second solution that falls back into the second solution collection chamber 124 increases. It mixes with the first solution through the fourth outlet 126 and the second pump body 134 to adjust the concentration of the first solution. When the concentration of the first solution does not need to be adjusted and the concentration of the second solution is higher than the threshold, salt particles can also crystallize out naturally.

[0061] In some embodiments of this application, the high-temperature, high-pressure refrigerant discharged by the compressor 201 from all air conditioning systems then enters the condenser 202 for condensation and heat release. The heat is transferred to the second solution in the heat source heat exchanger 129, achieving heat exchange between the refrigerant and the second solution, thus heating the second solution. After heat exchange between the refrigerant and the second solution, it becomes a medium-pressure, low-temperature refrigerant liquid. This liquid is then throttled and depressurized by the electronic expansion valve 203, becoming a low-temperature, low-pressure refrigerant liquid with subcooling properties before entering the evaporator 204, thereby cooling the first solution.

[0062] In some embodiments of this application, the heat source heat exchanger 129 and the cold source heat exchanger 112 are liquid-liquid heat exchangers. The thermal management device also includes an air conditioning system, which includes a refrigerant circulation loop. The refrigerant circulates in the refrigerant circulation loop, which consists of a compressor 201, a condenser 202, an electronic expansion valve 203, and an evaporator 204. The refrigerant discharged from the compressor 201 first passes through the heat source heat exchanger 129, where it condenses and releases heat. The second solution absorbs the heat and its temperature rises. After being throttled and depressurized by the electronic expansion valve 203, the refrigerant passes through the cold source heat exchanger 112, where it evaporates and absorbs heat from the first solution, thus cooling the first solution. At this time, the heat source heat exchanger 129 is the condenser 202 of the air conditioning system, and the cold source heat exchanger 112 is the evaporator 204 of the air conditioning system. The heat source heat exchanger 129 heats the second solution, and the cold source heat exchanger 112 cools the first solution.

[0063] In some embodiments of this application, the conductivity of the first solution in the first solution collecting chamber 106 is... And 0.002 μS / cm ≤0.08μS / cm; conductivity of the second solution in the second solution collecting chamber 124 And 0.1 μS / cm ≤0.5μS / cm; where, when When the flow rate is greater than 0.08 μS / cm, the three-way valve 111 switches, allowing the first solution to flow through the salt crystallization module 118, causing salt crystals to precipitate and ensuring... Within the preset range; when If the concentration is below 0.002 μS / cm, open the third valve and use the second solution to adjust the concentration of the first solution to ensure... Within the preset range; when If the concentration is higher than 0.5 μS / cm, the third valve is also opened to adjust the concentration of the second solution to ensure it is within the preset range.

[0064] In some embodiments of this application, the priorities are set to ensure the temperature of the energy storage battery, the humidity inside the energy storage battery module 100, and the salinity inside the energy storage battery module 100. Both the air supply volume and the air supply temperature affect the battery temperature. The air supply volume is changed first. If the temperature cannot be controlled by increasing the air supply volume, the intake air dehumidification and desalination module 103 is turned on to adjust the cooling capacity and obtain the intake air temperature. When the temperature reaches the set target, the humidity inside the energy storage battery module 100 is determined. If the humidity is not satisfied, the air supply temperature is adjusted. After the humidity inside the energy storage battery module 100 is controlled, the desalination control is entered. The conductivity of the first solution is controlled to ensure that it is lower than the conductivity of salt spray in the ocean air. The intake air can be desalinated by spraying.

[0065] The control method of this application is set according to different priorities to ensure the temperature, humidity and salinity of the energy storage battery module. The air volume and air temperature of the energy storage battery module both affect the battery temperature. The air volume is changed first. If the temperature cannot be controlled by increasing the air volume, the cooling capacity is adjusted and the average temperature of the energy storage battery module is verified to be within the target temperature range. When the temperature reaches the set target, the humidity inside the energy storage battery module is determined. If the humidity does not meet the requirements, the dehumidification capacity is calculated. After the humidity inside the energy storage battery module is well controlled, desalination control can be entered. The conductivity of the first solution is controlled, and desalination treatment of the incoming air can be achieved through spraying.

[0066] This application provides a thermal management control method for marine environmental energy storage batteries that integrates desalination, dehumidification, and cooling, enabling integrated thermal management control of cooling, dehumidification, and desalination.

[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these fall within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the appended claims.

Claims

1. A method for integrated thermal management and control of desalination, dehumidification, and cooling of marine environmental energy storage batteries, characterized in that, The control method is applied to an integrated thermal management device for desalination, dehumidification, and cooling of marine environmental energy storage batteries. The thermal management device includes: an energy storage battery module, an air inlet dehumidification and desalination module, a return air reprocessing module, a salt crystallization precipitation module, a cold source heat exchanger, a heat source heat exchanger, and a sensor module. The control method includes: prioritizing the temperature of the energy storage battery module by first changing the gas volume flow rate on the air inlet side of the dehumidification and desalination module; when the flow rate is increased to its maximum value and the temperature of the energy storage battery module still does not meet the target value, calculating the required cooling capacity and verifying whether the average temperature of the energy storage battery module is within the target temperature range; if it is, determining the humidity inside the energy storage battery module; if the humidity is not met, calculating the dehumidification capacity; when the humidity inside the energy storage battery module is controlled to the target humidity, desalination control can be initiated, controlling the conductivity of the first solution to keep it within a preset range.

2. The integrated thermal management and control method for desalination, dehumidification, and cooling of marine environmental energy storage batteries according to claim 1, characterized in that, The sensor module includes: The first temperature sensor is used to acquire the temperature on the air inlet side of the air intake module for dehumidification and desalination, denoted as t. in ; The second temperature sensor is used to acquire the temperature on the air outlet side of the air intake dehumidification and desalination module, which is also the temperature on the air intake side of the energy storage battery module, denoted as T. in ; The third temperature sensor is used to obtain the average temperature of the energy storage battery module, denoted as T. b ; The fourth temperature sensor is used to obtain the temperature at the air outlet of the energy storage battery module, denoted as T. out ; A gas flow sensor is used to acquire the gas volumetric flow rate on the inlet side of the inlet air dehumidification and desalination module, denoted as m. air,in ; The first humidity sensor is used to acquire the relative humidity on the air inlet side of the air intake module for dehumidification and desalination, denoted as φ. in ; The second humidity sensor is used to acquire the relative humidity on the outlet side of the intake air dehumidification and desalination module, denoted as φ. out ; The third humidity sensor is used to obtain the relative humidity inside the energy storage battery module, denoted as φ. b ; The first conductivity sensor is used to obtain the conductivity of the first solvent in the first solution collection chamber at the bottom of the dehumidification and desalination module, denoted as δ1; The second conductivity sensor is used to obtain the conductivity of the second solution in the second solution collection chamber at the bottom of the return air reprocessing module, denoted as δ2. The third conductivity sensor is used to obtain the conductivity of the solution in the salt crystallization precipitation module, denoted as δ3.

3. The integrated thermal management and control method for desalination, dehumidification, and cooling of marine environmental energy storage batteries according to claim 2, characterized in that, The thermal management control method is specifically as follows: Step 1: Battery thermal balance calculation Obtain the average temperature T of the energy storage battery module b When T b When the temperature is below a preset threshold, calculate the heat generation Q of the energy storage battery module. b : ； ； in, For the specific heat capacity of the energy storage battery module, M b For the quality of energy storage battery modules, T represents the specific heat capacity of air in the energy storage battery module. set The target temperature for the energy storage battery module. The heat carried away by the air intake of the energy storage battery module; control Unchanged, improved The temperature of the energy storage battery module is measured. If it reaches T... set Jump to the next priority relative humidity determination and control step; if the set temperature T is not reached. set ,conduct Reduce calculations, i.e., calculate cooling capacity; Step 2: Calculation of Cooling Capacity when Set to the maximum value m in, max If the battery temperature of the energy storage battery module still cannot be controlled at the target value, then it is necessary to calculate the cooling capacity and determine the theoretical calculated setpoint T for the air intake side of the energy storage battery module. in, set Then perform the following calculations; Calculate the saturated water vapor pressure of the air on the intake side of the intake air dehumidification and desalination module: ； Calculate the saturated water vapor pressure of the air on the outlet side of the intake air dehumidification and desalination module: ； Calculate the actual water vapor pressure of the air on the intake side of the intake air dehumidification and desalination module: ； Calculate the actual water vapor pressure of the air on the outlet side of the intake air dehumidification and desalination module: ； Calculate the actual moisture content of the air on the intake side of the intake air dehumidification and desalination module: Where P is standard atmospheric pressure; Calculate the actual moisture content of the air at the outlet side of the intake air dehumidification and desalination module: Where P is standard atmospheric pressure; Calculate the enthalpy of the air on the intake side of the intake air dehumidification and desalination module: ； in, For the density of air, The specific heat capacity of air; Calculate the enthalpy of the air on the outlet side of the intake air dehumidification and desalination module: ； When T in The set temperature T on the air intake side of the energy storage battery module in set At that time, the cooling capacity is obtained, which consists of two parts: latent heat and sensible heat, calculated as follows: ； ； ； After confirming the cooling capacity, adjustments are made to achieve the required cooling capacity. And verify the average temperature T of the energy storage battery module. b If the target temperature range is met, the temperature control program of the energy storage battery module will be exited and the humidity control of the energy storage battery module, which is the second priority, will be entered. Step 3: Calculation of Dehumidification Capacity When the relative humidity φ inside the energy storage battery module b Greater than the set threshold φ b set Calculate the dehumidification capacity: ; Humidity control should be performed according to the required dehumidification capacity.

4. The integrated thermal management and control method for desalination, dehumidification, and cooling of marine environmental energy storage batteries according to claim 1, characterized in that, The desalination control is defined as follows: the conductivity of the first solution in the first solution collecting chamber. And 0.002 μS / cm ≤0.08μS / cm; conductivity of the second solution in the second solution collecting chamber And 0.1 μS / cm ≤0.5μS / cm; where, when When the value is greater than 0.08 μS / cm, i.e., the first preset value, the first solution flows through the salt crystallization precipitation module, causing salt crystals to precipitate and ensuring... Within the preset range; when When the concentration is below 0.002 μS / cm, i.e., the second preset value, the concentration of the first solution is adjusted using the second solution to ensure... Within the preset range; when If the value is higher than 0.5 μS / cm, adjust the concentration of the second solution to ensure it is within the preset range.

5. The integrated thermal management and control method for desalination, dehumidification, and cooling of marine environmental energy storage batteries according to claim 3, characterized in that, In step two, the cooling capacity is controlled by adjusting the evaporation temperature of the cold source heat exchanger. When the cold source heat exchanger is the evaporator of an air conditioning system, the cooling capacity is controlled by adjusting the speed of the compressor in the air conditioning system, and / or the opening of the electronic expansion valve, and / or the speed of the evaporator fan, and / or the flow rate of the first solution.

6. The integrated thermal management and control method for desalination, dehumidification, and cooling of marine environmental energy storage batteries according to claim 3, characterized in that, In step three, the dehumidification capacity is controlled by using the cold source heat exchanger as an evaporator and by activating the dehumidification mode of the air conditioning system.

7. The integrated thermal management and control method for desalination, dehumidification, and cooling of marine environmental energy storage batteries according to claim 3, characterized in that, In step one, the preset temperature threshold is 35℃; in step two, the target temperature range is 20-30℃; in step three, the threshold φ b set The RH level is 25-35%.

8. The integrated thermal management and control method for desalination, dehumidification, and cooling of marine environmental energy storage batteries according to claim 3, characterized in that, m in, max It is controlled by the fan of the second evaporator of the air conditioning system, with a maximum speed set to 12,000 rpm.

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