Liquid cooling industrial and commercial storage temperature and humidity control energy storage system and control method

Abstract

The invention relates to a liquid cooling industrial and commercial temperature and humidity control energy storage system and a control method, and the method comprises the steps: collecting electric signals transmitted by a battery control management module, a fire-fighting fan, a liquid cooling unit, an industrial dehumidifier and a visual system based on an energy comprehensive management module; and temperature and humidity control is carried out based on a preset temperature and humidity adjusting strategy according to the electric signal, and the liquid cooling unit is controlled to enter a refrigeration mode, a self-circulation mode and a heating mode by judging the temperature of the battery cell, so that temperature and humidity adjustment is realized. The humidity in the cabinet is controlled through the dew-point temperature, it is guaranteed that no condensate water is generated in the cabinet in the plum rain season, the fire-fighting strong exhaust fan is used for forcibly discharging humidity, the visual system is used for increasing the humidity control means, it is guaranteed that the dew-point temperature in the cabinet is lower than the water outlet temperature of the liquid cooling unit, and through the temperature and humidity joint control adjusting strategy scheme, the temperature and humidity in the cabinet are adjusted. The safety of the battery in the whole life service cycle is ensured to the maximum extent, and thermal runaway and short circuit phenomena are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage control, and in particular to a liquid-cooled industrial and commercial energy storage system and a control method for controlling temperature and humidity. Background Art

[0002] Industrial and commercial energy storage is a typical application on the user side. Different from large-scale energy storage peak-shaving and frequency-regulating power stations, its main purpose is to use the peak-valley price difference of the power grid to achieve investment returns. The main load is to meet the power demand within the industry and commerce itself, to maximize the self-use of photovoltaic power generation, or to arbitrage through the peak-valley price difference, and has the transaction attributes of the power spot market. Its application scenarios solve the problem of fast and efficient power consumption in scenarios such as industrial power consumption in non-residential areas, community power consumption in residential areas, fast charging power consumption of new energy vehicles, power consumption in supermarkets, and power consumption in hospitals.

[0003] Liquid cooling technology can achieve precise temperature control of the battery and ensure uniform cooling by directly dissipating heat through liquid convection. However, in some high temperature and high humidity areas or rainy seasons, in addition to maintaining the battery in an appropriate temperature range, it is also necessary to control the temperature and humidity of the external environment of the energy storage battery, especially humidity control. Improper humidity regulation will liquefy on the surface of the module to form a large amount of condensed water, which can easily enter the battery's electrical component connector, causing a short circuit inside the industrial and commercial energy storage cabinet, resulting in a decrease in the life and quality of the equipment.

[0004] Most current liquid-cooled industrial and commercial energy storage systems are equipped with independent dehumidifiers in the control cabinet, relying solely on the humidity in the control cabinet to prevent the generation of condensed water. If this solution causes a large difference between the cold plate outlet and the ambient temperature due to cabinet sealing or cabinet insulation, the control accuracy is too low, which can easily lead to the generation of condensed water in the cabinet.

[0005] Therefore, it is necessary to improve the above-mentioned defects. Summary of the invention

[0006] In view of this, it is necessary to provide a liquid-cooled industrial and commercial energy storage temperature and humidity control energy storage system and control method to solve the problem of low temperature and humidity control accuracy of the existing industrial and commercial energy storage system.

[0007] In order to solve the above problems, the present invention provides a liquid-cooled industrial and commercial storage temperature and humidity control energy storage system, including: a cabinet structure and a pipeline structure; the cabinet structure includes a DC cabin, a temperature control cabin and an AC cabin; the pipeline structure includes a liquid outlet pipeline and a liquid return pipeline; The DC cabin is equipped with several battery modules, a battery control management module, an energy integrated management module, a fire-fighting fan, an industrial dehumidifier and a visual system; The temperature control cabin is provided with a liquid cooling unit; the energy integrated management module is communicatively connected with the battery control management module, the fire fighting fan, the liquid cooling unit, the industrial dehumidifier and the visual system; The AC cabin is provided with a high-voltage fusion PCS converter, an air inlet duct and an air outlet duct, and the air inlet duct and the air outlet duct are provided on both sides of the high-voltage fusion PCS converter; The liquid outlet pipeline and the liquid return pipeline both run through the direct current cabin and the temperature control cabin; Among them, the comprehensive energy management module is used to collect electrical signals transmitted by the battery control management module, fire fan, liquid cooling unit, industrial dehumidifier and visual system, and perform temperature and humidity control according to the electrical signals based on a preset temperature and humidity adjustment strategy.

[0008] In a possible implementation, the battery control management module is electrically connected to the plurality of battery modules, and is used to collect battery cell temperature signals of the plurality of batteries, and transmit the battery cell temperature signals to the energy integrated management module.

[0009] In one possible implementation, the industrial dehumidifier is used to suck the humid air in the enclosed space formed in the DC cabin into the industrial dehumidifier through a fan, cool it down and condense it through a semiconductor refrigerator. The condensation on the refrigerator drips into the water ditch under the action of gravity, and then flows out of the cabinet through a water pipe, thereby reducing the humidity inside the enclosed cabinet.

[0010] In a possible implementation, the visual system is used to detect condensation at the water inlets and outlets of several battery modules in the DC compartment to generate a condensation visual signal, calculate the dew point temperature, and convert the condensation visual signal and the dew point temperature into electrical signals and transmit them to the energy integrated management module.

[0011] In a possible implementation, the fire-fighting fan is shared by fire-fighting and forced dehumidification, and is used to forcibly exhaust the wet air in the cabinet when the visual system determines that condensation occurs and the humidity is too high.

[0012] In order to solve the above problems, the present invention also provides a temperature and humidity control method, which is applied to the above liquid-cooled industrial and commercial storage temperature and humidity control energy storage system, and the method comprises: Based on the energy integrated management module, the electrical signals transmitted by the battery control management module, fire fan, liquid cooling unit, industrial dehumidifier and visual system are collected, and the temperature and humidity are controlled according to the electrical signals based on the preset temperature and humidity adjustment strategy.

[0013] In a possible implementation, the temperature and humidity control based on the preset temperature and humidity adjustment strategy according to the electrical signal includes: When the energy integrated management module communicates normally with the liquid cooling unit, the fire fighting fan and the visual system, the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the battery modules collected by the battery control management module are obtained in real time, and the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature are compared with the preset cell temperature threshold, wherein the cell temperature threshold includes the maximum temperature threshold Ts max and minimum temperature threshold Ts min ; When the maximum value of the cell temperature Tcell_max is greater than or equal to the maximum temperature threshold Ts max When the energy integrated management module controls the liquid cooling unit to enter the cooling mode; When the maximum value Tcell_max of the cell temperature is less than the maximum temperature threshold Ts max , and when the minimum value of the cell temperature Tcell_min is greater than the minimum temperature threshold Ts min When the energy integrated management module controls the liquid cooling unit to enter the self-circulation mode; When the minimum value Tcell_min of the cell temperature is less than the minimum temperature threshold Ts min When the integrated energy management module controls the liquid cooling unit to enter the heating mode.

[0014] In a possible implementation, the cooling mode includes: The energy integrated management module controls the liquid cooling unit, sets the cooling point to T1 and the cooling sensitivity to T2; The energy integrated management module controls the industrial dehumidifier to start, and sets the start humidity to RH1 and the stop humidity to RH2; Use the visual system to determine whether there is condensation; If condensation occurs, the dew point temperature is calculated as T by the visual system. con， And transmit the signal to the energy comprehensive management module, the energy comprehensive management module controls the liquid cooling unit to set the water temperature cooling point to T con, the cooling sensitivity is T2; and continue to judge whether the maximum value Tcell_max of the battery cell temperature is less than T3. If so, transmit a signal to enable the energy comprehensive management module to continue to obtain the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the several battery modules collected by the battery control management module in real time. If not, the energy comprehensive management module controls the liquid cooling unit, sets the cooling point to T1, the cooling sensitivity to T2, and the energy comprehensive management module controls the fire fan to start, force dehumidification, and control the visual system to continuously judge whether there is condensation phenomenon, until there is no condensation phenomenon and then stop Dehumidification, when there is no condensation, the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the several battery modules, and determines whether the maximum value Tcell_max of the battery cell temperature is less than T3. If so, a signal is transmitted to enable the energy comprehensive management module to continue to obtain the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the several battery modules collected by the battery control management module in real time. If not, the energy comprehensive management module controls the liquid cooling unit, sets the cooling point to T1, and the cooling sensitivity to T2; If there is no condensation, the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the several battery modules, and determines whether the maximum value Tcell_max of the cell temperature is less than T3. If so, a signal is transmitted to enable the energy integrated management module to continue to obtain the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the several battery modules collected by the battery control management module in real time. If not, the energy integrated management module controls the liquid cooling unit, sets the cooling point to T1, and the cooling sensitivity to T2.

[0015] In a possible implementation, the self-circulation mode includes: The energy integrated management module controls the industrial dehumidifier to start, and sets the start humidity to RH1 and the stop humidity to RH2; Use the visual system to determine whether there is condensation; If condensation occurs, the dew point temperature is calculated as T by the visual system. con， And transmit the signal to the energy comprehensive management module, the energy comprehensive management module controls the liquid cooling unit to set the water temperature cooling point to T con , and the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the plurality of battery modules and transmits them to the energy comprehensive management module; If there is no condensation, the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the plurality of battery modules and transmits them to the energy comprehensive management module.

[0016] In a possible implementation, the heating mode includes: The energy integrated management module controls the liquid cooling unit, sets the water temperature heating point to T4 and the heating sensitivity to T5; The energy integrated management module acquires in real time the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the plurality of battery modules collected by the battery control management module; Determine whether the minimum cell temperature Tcell_min is greater than T6; If yes, the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the plurality of battery modules and transmits them to the energy integrated management module; If not, the energy integrated management module controls the liquid cooling unit, sets the water temperature heating point to T4 and the heating sensitivity to T5, until the minimum cell temperature Tcell_min is greater than T6.

[0017] The beneficial effects of the present invention are as follows: the present invention controls the humidity in the cabinet through the dew point temperature to ensure that no condensed water is generated in the cabinet during the rainy season, utilizes the fire exhaust fan to force dehumidification and the visual system to increase the humidity control means, ensures that the dew point temperature in the cabinet is lower than the outlet water temperature of the liquid cooling unit, and maximizes the safety of the battery throughout its life cycle through the temperature and humidity joint control adjustment strategy scheme, avoiding thermal runaway and short circuit phenomena. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of the structure of a liquid-cooled industrial and commercial temperature and humidity control energy storage system provided by an embodiment of the present invention; Figure 2 A schematic diagram of a flow chart of a temperature and humidity control method provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a liquid-cooled industrial and commercial energy storage system control module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0021] The descriptions of "first", "second", etc. involved in the embodiments of the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the technical features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0022] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] A specific embodiment of the present invention, as Figure 1 As shown, the present invention provides a liquid-cooled industrial and commercial storage temperature and humidity control energy storage system, including: a cabinet structure and a pipeline structure; the cabinet structure includes a DC cabin 1, a temperature control cabin 2 and an AC cabin 3; the pipeline structure includes a liquid outlet pipeline 4 and a liquid return pipeline 5.

[0024] The DC compartment 1 is provided with a plurality of battery modules 11, a battery management system (BMS), an energy management system (EMS), a fire fan 12, a visual system 13 and an industrial dehumidifier 14; A liquid cooling unit 15 is provided in the temperature control cabin 2; the energy integrated management module is communicatively connected with the battery control management module, the fire-fighting fan, the industrial dehumidifier and the visual system; A high-voltage fusion PCS converter 16, an air inlet duct 17 and an air outlet duct 18 are arranged in the AC cabin 3. The air inlet duct 17 and the air outlet duct 18 are arranged on both sides of the high-voltage fusion PCS converter 16; The liquid outlet pipeline 4 and the liquid return pipeline 5 both pass through the direct current cabin 1 and the temperature control cabin 2; Among them, the energy integrated management module EMS is used to collect electrical signals transmitted by the battery control management module BMS, the fire fan 12, the liquid cooling unit 15, the industrial dehumidifier 13 and the visual system 14, and control the temperature and humidity according to the electrical signals based on the preset temperature and humidity adjustment strategy.

[0025] It should be noted that the system is divided into three compartments, DC compartment 1, temperature control compartment 2, and AC compartment 3. The three compartments are independent of each other and interconnected, and the cabinet structure is divided into three independent compartments.

[0026] In some embodiments, the battery control management module is electrically connected to several battery modules 11 for collecting the cell temperature signals of several batteries and transmitting the cell temperature signals to the energy integrated management module. In a preferred embodiment, the number of battery modules 11 is 5.

[0027] In some embodiments, the industrial dehumidifier 13 is used to suck the humid air in the enclosed space formed in the DC cabin 1 into the industrial dehumidifier 13 through a fan and cool it down and condense it through a semiconductor refrigerator. The condensation of the refrigerator drips into the water ditch under the action of gravity, and then flows out of the cabinet through the water pipe, thereby reducing the humidity in the enclosed cabinet.

[0028] In some embodiments, the visual system 14 is used to detect condensation at the water inlets and outlets of several battery modules 11 in the DC compartment 1 to generate a condensation visual signal, calculate the dew point temperature, and convert the condensation visual signal and the dew point temperature into electrical signals and transmit them to the energy integrated management module.

[0029] In some embodiments, the fire-fighting fan 12 is used for fire-fighting and forced dehumidification, and is used to forcefully exhaust the wet air in the cabinet when the visual system 14 determines that condensation occurs and the humidity is too high.

[0030] It should be noted that the DC cabin 1 includes a battery module 11, a battery control system (BMS), an energy integrated management system (EMS), a fire fan 12, an industrial dehumidifier 13, a visual system 14 and part of the secondary and tertiary liquid inlet and outlet pipelines 4; the temperature control cabin 2 includes a liquid cooling unit 15 and secondary liquid inlet and outlet pipelines 4, which are installed horizontally. The coolant with a lower temperature output by the liquid cooling unit 15 first enters the secondary pipeline of the system, and then reaches the battery module 11 of the DC cabin 1 and the tertiary pipeline of the secondary pipeline through the male and female joints of the compartments. The coolant is finally returned to the secondary pipeline of the system, and then passes through the liquid cooling unit 15 and the fluorine path side of the cooling unit for heat exchange and cooling. The heat on the fluorine path side is cooled by the fan of the external circulation condenser. The AC cabin 3 includes a high-voltage fusion PCS converter 16 to realize the original function integration with the sub-control box, and the internal components of the sub-control box and the main circuit are integrated inside the PCS.

[0031] See also Figure 3The energy integrated management system (EMS) collects the electrical signals of the battery control system (BMS), liquid cooling unit 15, converter PCS, fire fan 12, industrial dehumidifier 13, and visual system 14, and realizes the overall temperature and humidity joint control and regulation through the control strategy corresponding to the battery temperature and temperature regulation, so as to maximize the safety of the battery in DC cabin 1 throughout its life cycle and avoid thermal runaway and short circuit.

[0032] Furthermore, the industrial dehumidifier 13, the visual system 14 and the fire-fighting fan 12 have the function of controlling the humidity of the DC compartment 1, so as to avoid excessive humidity in the DC compartment 1, which may cause condensation water to endanger the safety of the battery cells in the DC compartment 1. The industrial dehumidifier 13 is used to suck the humid air in the enclosed space formed in the DC compartment 1 into the industrial dehumidifier 13 through the fan, and cool and condense through the semiconductor refrigerator. The condensation of the refrigerator drips into the water inlet trough under the action of gravity, and then flows out of the cabinet through the water pipe, thereby reducing the humidity in the enclosed cabinet. The visual system 14 is used to detect the condensation phenomenon at the water inlet and outlet of the battery module 11 in the DC compartment 1, and calculate the dew point temperature, and convert the visual signal and dew point temperature of the visual system 14 into electrical signals and transmit them to the energy integrated management system (EMS). The fire-fighting fan 12 is shared by fire-fighting and dehumidification. It is only used to forcibly exhaust the humid air in the cabinet after the visual system 14 determines that condensation occurs and the humidity is too high. Its dry node signal is independent of the fire-fighting signal.

[0033] The high-voltage fusion PCS converter 16 realizes the original functional integration with the sub-control box. The internal components of the sub-control box and the main circuit are integrated inside the PCS to realize AC and DC high-voltage integration. Its protection level is IP66, and its temperature control is controlled by the fan speed control inside the PCS. Therefore, the temperature and humidity control of DC cabin 1 is unrelated to AC cabin 3.

[0034] In order to solve the above problems, the present invention also provides a temperature and humidity control method, which is applied to the above liquid-cooled industrial and commercial storage temperature and humidity control energy storage system. Figure 2 , the method comprising: Based on the energy comprehensive management module, the electrical signals transmitted by the battery control management module, the fire fan 12, the industrial dehumidifier 13 and the visual system 14 are collected, and the temperature and humidity are controlled according to the electrical signals based on the preset temperature and humidity adjustment strategy.

[0035] Specifically, the temperature and humidity are controlled according to the electrical signal based on the preset temperature and humidity adjustment strategy, including: When the energy integrated management module communicates normally with the liquid cooling unit 15, the fire fan 12 and the visual system 14, the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the battery modules 11 collected by the battery control management module are obtained in real time, and the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature are compared with the preset cell temperature threshold, wherein the cell temperature threshold includes the maximum temperature threshold Ts max and minimum temperature threshold Ts min ; When the maximum cell temperature Tcell_max is greater than or equal to the maximum temperature threshold Ts max When the energy integrated management module controls the liquid cooling unit 15 to enter the cooling mode; When the maximum cell temperature Tcell_max is less than the maximum temperature threshold Ts max , and when the minimum value of the cell temperature Tcell_min is greater than the minimum temperature threshold Ts min When the energy integrated management module controls the liquid cooling unit 15 to enter the self-circulation mode; When the minimum cell temperature Tcell_min is less than the minimum temperature threshold Ts min When the integrated energy management module controls the liquid cooling unit 15 to enter the heating mode.

[0036] Specifically, the cooling modes include: The energy integrated management module controls the liquid cooling unit 15, sets the cooling point to T1, and the cooling sensitivity to T2; The energy integrated management module controls the industrial dehumidifier 13 to start, and sets the start humidity to RH1 and the stop humidity to RH2; Determine whether there is condensation through the visual system 14; If condensation occurs, the dew point temperature is calculated as T by the visual system 14. con， And transmit the signal to the energy comprehensive management module, which controls the liquid cooling unit 15 to set the water temperature cooling point to T con, the cooling sensitivity is T2; and continue to judge whether the maximum value of the cell temperature Tcell_max is less than the maximum temperature threshold T3 (slightly less than Tsmax) allowed by the cell cooling mode. If so, the signal is transmitted to enable the energy comprehensive management module to continue to obtain the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the battery modules 11 collected by the battery control management module in real time. If not, the energy comprehensive management module controls the liquid cooling unit 15, sets the cooling point to T1, the cooling sensitivity to T2, and the energy comprehensive management module controls the fire fan 12 to turn on, force dehumidification, and controls the visual system 14 to continuously judge whether there is condensation. Dew phenomenon, until there is no condensation phenomenon, then stop dehumidification, when there is no condensation phenomenon, then the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the battery modules 11, and judges whether the maximum value Tcell_max of the battery cell temperature is less than T3, if so, then transmits a signal to enable the energy comprehensive management module to continue to obtain the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the battery modules 11 collected by the battery control management module in real time, if not, then the energy comprehensive management module controls the liquid cooling unit 15, sets the cooling point to T1, and the cooling sensitivity to T2; If there is no condensation, the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in several battery modules 11, and determines whether the maximum value Tcell_max of the cell temperature is less than T3. If so, a signal is transmitted to enable the energy integrated management module to continue to obtain the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in several battery modules 11 collected by the battery control management module in real time. If not, the energy integrated management module controls the liquid cooling unit 15, sets the cooling point to T1, and the cooling sensitivity to T2.

[0037] Specifically, the self-circulation mode includes: The energy integrated management module controls the industrial dehumidifier 13 to start, and sets the start humidity to RH1 and the stop humidity to RH2; Determine whether there is condensation through the visual system 14; If condensation occurs, the dew point temperature is calculated as T by the visual system 14. con， And transmit the signal to the energy comprehensive management module, which controls the liquid cooling unit 15 to set the water temperature cooling point to T con , and the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the battery modules 11 and transmits them to the energy comprehensive management module; If there is no condensation, the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the temperature of each battery cell in the battery modules 11 and transmits them to the energy integrated management module.

[0038] Specifically, the heating modes include: The energy integrated management module controls the liquid cooling unit 15, sets the water temperature heating point to T4, and the heating sensitivity to T5; The energy integrated management module obtains in real time the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the battery modules 11 collected by the battery control management module; Determine whether the minimum cell temperature Tcell_min is greater than the minimum temperature threshold T6 (slightly greater than Tsmin) allowed by the cell heating mode; If yes, the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the battery modules 11 and transmits them to the energy integrated management module; If not, the energy integrated management module controls the liquid cooling unit 15, sets the water temperature heating point to T4, and the heating sensitivity to T5, until the minimum cell temperature Tcell_min is greater than T6.

[0039] In order to further explain the principle of the control method, the following is a detailed explanation: The temperature and humidity linkage control mode is as follows: the energy integrated management system (EMS) communicates with the battery control system (BMS), the liquid cooling unit 15, the industrial dehumidifier 13, the fire fan 12 and the visual system 14 in real time, collects the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature, and selects different temperature and humidity linkage control modes according to the maximum and minimum temperatures of the battery cell. When T cell_max ≥ Tsmax value, the liquid cooling unit 15 is controlled to start and enter the cooling mode, and the EMS controls the water temperature cooling point of the liquid cooling unit 15 to be T1, the cooling sensitivity to be T2, and controls the industrial dehumidifier 13 to start, the humidity when the industrial dehumidifier 13 is turned on is RH1, and the humidity when it is stopped is RH2. The visual system 14 detects the condensation phenomenon at the water inlet and outlet of the battery module 11 of the DC compartment 1 and makes a judgment, and transmits the judgment signal to the EMS. If there is no condensation phenomenon, the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature are collected in real time, and the conditions are met and the system exits. If condensation occurs at the water inlet and outlet of the battery module 11 in room 1 of the DC cabin, the visual system 14 calculates the dew point temperature according to the temperature and humidity in the cabinet, and the EMS controls the liquid cooling unit 15 to be in cooling mode, with the water temperature cooling point being the dew point temperature Tcon and the cooling sensitivity being T2. The maximum cell temperature Tcell_max and the minimum cell temperature Tcell_min are collected in real time, and the system exits after the condition Tcell_max<T3 is met. If the condition is not met, the EMS controls the water temperature cooling point of the liquid cooling unit 15 to be T1 and the cooling sensitivity to T2, and controls the fire-fighting fan 12 to force dehumidification to reduce the humidity in room 1 of the DC cabin, until the visual system 14 detects that there is no condensation at the water inlet and outlet of the battery module 11 in room 1 of the DC cabin, and exits.

[0040] When T cell_max<Tsmax&Tmin>Tsmin value, EMS controls the liquid cooling unit 15 to enter the self-circulation mode, and controls the industrial dehumidifier 13 to start, the industrial dehumidifier 13 starts with a humidity of RH1, and stops with a humidity of RH2. The visual system 14 detects the condensation phenomenon at the water inlet and outlet of the battery module 11 in the DC compartment 1 and makes a judgment, and transmits the judgment signal to the EMS. If there is no condensation phenomenon, the EMS exits. If there is condensation phenomenon, the EMS controls the water temperature outlet temperature to the dew point temperature Tcon, and collects the maximum value of the battery cell temperature Tcell_max and the minimum value of the battery cell temperature Tcell_min in real time.

[0041] When Tmin≤Tsmin, regardless of the state of the battery system, the liquid cooling unit 15 is controlled to start and enter the heating mode, the heating wire is turned on, the water temperature heating point is T4, and the water temperature heating sensitivity is T5. After the conditions are met, the heating mode is exited. Since the battery system is in the heating mode in winter, the ambient temperature in winter is lower than the water temperature, so condensation will not occur. Different working modes of the liquid cooling unit 15 and the fire fan 12 are selected by the maximum value Tmax of the battery cell temperature, the minimum value Tmin of the battery cell temperature, the visual system 14, and the industrial dehumidifier 13, so as to realize the temperature and humidity joint control and adjustment of the overall liquid-cooled industrial and commercial energy storage system, avoid unnecessary energy loss and thermal management loss, realize the overall circulation power and heat dissipation power adjustment, maximize the safety of the battery in the DC cabin 1 throughout its life cycle, and avoid thermal runaway and short circuit.

[0042] In summary, the liquid-cooled industrial and commercial storage temperature and humidity control energy storage system and method provided by the present invention controls the humidity in the cabinet through the dew point temperature to ensure that no condensation water is generated in the cabinet during the rainy season, and uses the fire exhaust fan to force dehumidification and the visual system to increase the humidity control means to ensure that the dew point temperature in the cabinet is lower than the outlet water temperature of the liquid cooling unit. Through the temperature and humidity joint control adjustment strategy, the safety of the battery throughout its life cycle is maximized to avoid thermal runaway and short circuit phenomena.

[0043] The above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A liquid-cooled industrial and commercial temperature and humidity control energy storage system, characterized in that: include: Cabinet structure and pipeline structure; the cabinet structure includes DC cabin, temperature control cabin and AC cabin; the pipeline structure includes liquid outlet pipeline and liquid return pipeline; The DC cabin is equipped with several battery modules, a battery control management module, an energy integrated management module, a fire-fighting fan, an industrial dehumidifier and a visual system; The temperature control cabin is provided with a liquid cooling unit; the energy integrated management module is communicatively connected with the battery control management module, the fire fighting fan, the liquid cooling unit, the industrial dehumidifier and the visual system; The AC cabin is provided with a high-voltage fusion PCS converter, an air inlet duct and an air outlet duct, and the air inlet duct and the air outlet duct are provided on both sides of the high-voltage fusion PCS converter; The liquid outlet pipeline and the liquid return pipeline both run through the direct current cabin and the temperature control cabin; Among them, the comprehensive energy management module is used to collect electrical signals transmitted by the battery control management module, fire fan, liquid cooling unit, industrial dehumidifier and visual system, and perform temperature and humidity control according to the electrical signals based on a preset temperature and humidity adjustment strategy.

2. The liquid-cooled industrial and commercial temperature and humidity control energy storage system according to claim 1 is characterized in that: The battery control management module is electrically connected to the plurality of battery modules, and is used for collecting the battery cell temperature signals of the plurality of batteries, and transmitting the battery cell temperature signals to the energy comprehensive management module.

3. The liquid-cooled industrial and commercial temperature and humidity control energy storage system according to claim 1, characterized in that: The industrial dehumidifier is used to suck the humid air in the enclosed space formed in the DC cabin into the industrial dehumidifier through a fan and cool it down and condense it through a semiconductor refrigerator. The condensation of the refrigerator drips into the water ditch under the action of gravity and then flows out of the cabinet through a water pipe, thereby reducing the humidity in the enclosed cabinet.

4. The liquid-cooled industrial and commercial temperature and humidity control energy storage system according to claim 1, characterized in that: The visual system is used to detect condensation at the water inlets and outlets of several battery modules in the DC compartment, generate condensation visual signals, calculate the dew point temperature, and convert the condensation visual signals and dew point temperature into electrical signals to be transmitted to the energy integrated management module.

5. The liquid-cooled industrial and commercial temperature and humidity control energy storage system according to claim 1, characterized in that: The fire-fighting fan is shared by fire-fighting and forced dehumidification, and is used to forcibly exhaust the wet air in the cabinet when the visual system determines that condensation occurs and the humidity is too high.

6. A temperature and humidity control method, applied to the liquid-cooled industrial and commercial temperature and humidity control energy storage system according to any one of claims 1 to 5, characterized in that: The method comprises: Based on the energy integrated management module, the electrical signals transmitted by the battery control management module, fire fan, liquid cooling unit, industrial dehumidifier and visual system are collected, and the temperature and humidity are controlled according to the electrical signals based on the preset temperature and humidity adjustment strategy.

7. The temperature and humidity control method according to claim 6, characterized in that: The temperature and humidity control based on the preset temperature and humidity adjustment strategy according to the electrical signal includes: When the energy integrated management module communicates normally with the liquid cooling unit, the fire fighting fan and the visual system, the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the battery modules collected by the battery control management module are obtained in real time, and the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature are compared with the preset cell temperature threshold, wherein the cell temperature threshold includes the maximum temperature threshold Ts max and minimum temperature threshold Ts min ; When the maximum value of the cell temperature Tcell_max is greater than or equal to the maximum temperature threshold Ts max When the energy integrated management module controls the liquid cooling unit to enter the cooling mode; When the maximum value Tcell_max of the cell temperature is less than the maximum temperature threshold Ts max , and when the minimum value of the cell temperature Tcell_min is greater than the minimum temperature threshold Ts min When the energy integrated management module controls the liquid cooling unit to enter the self-circulation mode; When the minimum value Tcell_min of the cell temperature is less than the minimum temperature threshold Ts min When the integrated energy management module controls the liquid cooling unit to enter the heating mode.

8. The temperature and humidity control method according to claim 7, characterized in that: The cooling modes include: The energy integrated management module controls the liquid cooling unit, sets the cooling point to T1 and the cooling sensitivity to T2; The energy integrated management module controls the industrial dehumidifier to start, and sets the start humidity to RH1 and the stop humidity to RH2; Use the visual system to determine whether there is condensation; If condensation occurs, the dew point temperature is calculated as T by the visual system. con， And transmit the signal to the energy comprehensive management module, the energy comprehensive management module controls the liquid cooling unit to set the water temperature cooling point to T con , the cooling sensitivity is T2; and continue to judge whether the maximum value Tcell_max of the battery cell temperature is less than T3. If so, transmit a signal to enable the energy comprehensive management module to continue to obtain the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the several battery modules collected by the battery control management module in real time. If not, the energy comprehensive management module controls the liquid cooling unit, sets the cooling point to T1, the cooling sensitivity to T2, and the energy comprehensive management module controls the fire fan to start, force dehumidification, and control the visual system to continuously judge whether there is condensation phenomenon, until there is no condensation phenomenon and then stop Dehumidification, when there is no condensation, the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the several battery modules, and determines whether the maximum value Tcell_max of the battery cell temperature is less than T3. If so, a signal is transmitted to enable the energy comprehensive management module to continue to obtain the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the several battery modules collected by the battery control management module in real time. If not, the energy comprehensive management module controls the liquid cooling unit, sets the cooling point to T1, and the cooling sensitivity to T2; If there is no condensation, the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the several battery modules, and determines whether the maximum value Tcell_max of the cell temperature is less than T3. If so, a signal is transmitted to enable the energy integrated management module to continue to obtain the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the several battery modules collected by the battery control management module in real time. If not, the energy integrated management module controls the liquid cooling unit, sets the cooling point to T1, and the cooling sensitivity to T2.

9. The temperature and humidity control method according to claim 7, characterized in that: The self-circulation mode includes: The energy integrated management module controls the industrial dehumidifier to start, and sets the start humidity to RH1 and the stop humidity to RH2; Use the visual system to determine whether there is condensation; If condensation occurs, the dew point temperature is calculated as T by the visual system. con， And transmit the signal to the energy comprehensive management module, the energy comprehensive management module controls the liquid cooling unit to set the water temperature cooling point to T con , and the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the plurality of battery modules and transmits them to the energy comprehensive management module; If there is no condensation phenomenon, the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the plurality of battery modules and transmits them to the energy comprehensive management module.

10. The temperature and humidity control method according to claim 7, characterized in that: The heating modes include: The energy integrated management module controls the liquid cooling unit, sets the water temperature heating point to T4 and the heating sensitivity to T5; The energy integrated management module acquires in real time the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the plurality of battery modules collected by the battery control management module; Determine whether the minimum cell temperature Tcell_min is greater than T6; If yes, the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the plurality of battery modules and transmits them to the energy integrated management module; If not, the energy integrated management module controls the liquid cooling unit, sets the water temperature heating point to T4 and the heating sensitivity to T5, until the minimum cell temperature Tcell_min is greater than T6.

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