Liquid-cooled industrial and commercial temperature and humidity control energy storage system and control method

Abstract

The application relates to a liquid-cooled industrial and commercial temperature and humidity control energy storage system and a control method, and the control method comprises the following 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 controlling temperature and humidity according to the electric signals based on a preset temperature and humidity adjusting strategy, wherein 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 the temperature and humidity are adjusted. In the application, the humidity in the cabinet is controlled by using the dew point temperature, condensate water is prevented from being generated in the cabinet in the plum rain season, forced dehumidification is realized by using the fire-fighting strong exhaust fan, and the visual system is used to increase the humidity control means, so that the dew point temperature in the cabinet is lower than the water outlet temperature of the liquid-cooling unit. Through the temperature and humidity joint control adjusting strategy scheme, the safety of the whole life cycle of the battery is maximally ensured, and the thermal runaway and short circuit phenomena are avoided.

Description

TECHNICAL FIELD

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

[0002] Industrial and commercial energy storage is a typical application at the user side, unlike large-scale energy storage power stations for peak regulation and frequency regulation. Its main purpose is to realize investment return by using the price difference between peak and valley of the power grid. The main load is to meet the internal power demand of industrial and commercial enterprises, to realize maximum self-generation and self-use of photovoltaic power generation, or to realize arbitrage through the price difference between peak and valley, and to have the attribute of power spot market transaction. The application scenario solves the problem of fast and efficient power use in non-residential industrial power, residential power, new energy vehicle fast charging power, commercial power, hospital power and other scenarios.

[0003] The liquid cooling technology can realize accurate temperature control of the battery through the direct heat dissipation mode of liquid convection, and ensure the uniformity of cooling. However, in some high-temperature and high-humidity areas or plum rain seasons, in addition to the need to maintain the battery in a suitable temperature range, temperature and humidity control of the external environment of the energy storage battery is also essential, especially humidity regulation. Improper humidity regulation can cause a large amount of condensed water to form on the surface of the module, which is easy to enter the battery connector, causing short circuit inside the industrial and commercial energy storage cabinet, and reducing the service life and quality of the equipment.

[0004] At present, the industrial and commercial energy storage system of the liquid cooling mostly configures an independent dehumidifier in the control cabinet to prevent the generation of condensed water by controlling the humidity in the cabinet. However, if the cabinet is sealed or the cabinet body is insulated, the control precision is too low when the temperature difference between the water outlet of the cold plate and the ambient temperature is too large, which can also cause the generation of condensed water in the cabinet.

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

[0006] Therefore, it is necessary to provide a liquid-cooled industrial and commercial temperature and humidity control energy storage system and a control method to solve the problem of low temperature and humidity control precision of the prior art industrial and commercial energy storage system.

[0007] In order to solve the above-mentioned problems, the present application provides a liquid-cooled industrial and commercial temperature and humidity control energy storage system, comprising: a cabinet structure and a pipeline structure; the cabinet structure comprises a direct current cabin, a temperature control cabin and an alternating current cabin; the pipeline structure comprises a liquid outlet pipeline and a liquid return pipeline;

[0008] A plurality of battery modules, a battery control and management module, an energy comprehensive management module, a fire-fighting fan, an industrial dehumidifier and a visual system are arranged in the direct current cabin.

[0009] The temperature control cabin is internally provided with a liquid cooling unit; the energy comprehensive management module is in communication connection with the battery control management module, the fire-fighting fan, the liquid cooling unit, the industrial dehumidifier and the visual system;

[0010] The AC cabin is internally 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 arranged on both sides of the high-voltage fusion PCS converter.

[0011] The liquid outlet pipeline and the liquid return pipeline both penetrate the DC cabin and the temperature control cabin.

[0012] The energy comprehensive management module is used for collecting the electric signals transmitted by the battery control management module, the fire-fighting fan, the liquid cooling unit, the industrial dehumidifier and the visual system, and performing temperature and humidity control according to the electric signals based on a preset temperature and humidity adjustment strategy.

[0013] In a possible implementation, the battery control management module is electrically connected with the plurality of battery modules, and is used for collecting the cell temperature signals of the plurality of batteries and transmitting the cell temperature signals to the energy comprehensive management module.

[0014] In a possible implementation, the industrial dehumidifier is used for absorbing the humid air in the closed space in the DC cabin into the interior of the industrial dehumidifier through a fan, and the humid air is cooled and dewed by a semiconductor refrigerator, the dew of the refrigerator is dripped into a water guide groove under the action of gravity, and then flows out of the cabinet through a water guide pipe, so as to reduce the humidity in the closed cabinet.

[0015] In a possible implementation, the visual system is used for generating a condensation visual signal after detecting the condensation phenomenon of the water inlets and outlets of the plurality of battery modules in the DC cabin, and calculating a dew point temperature, and the condensation visual signal and the dew point temperature are converted into an electric signal and transmitted to the energy comprehensive management module.

[0016] In a possible implementation, the fire-fighting fan is used for fire-fighting and forced dehumidification, and is used for forcibly discharging the humid air in the cabinet when the visual system determines that the condensation phenomenon occurs and the humidity is too high.

[0017] In order to solve the above problems, the application further provides a temperature and humidity control method applied to the liquid cooling industrial and commercial storage temperature and humidity control energy storage system, and the method comprises the following steps:

[0018] The energy comprehensive management module is used for collecting the electric signals transmitted by the battery control management module, the fire-fighting fan, the liquid cooling unit, the industrial dehumidifier and the visual system, and performing temperature and humidity control according to the electric signals based on a preset temperature and humidity adjustment strategy.

[0019] In a possible implementation, the temperature and humidity control according to the preset temperature and humidity adjustment strategy based on the electric signal comprises:

[0020] In the case that the energy comprehensive management module is in normal communication 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 plurality of battery modules collected by the battery control management module are acquired in real time, and the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature are compared with preset cell temperature thresholds, wherein the cell temperature thresholds comprise a maximum temperature threshold Ts max and a minimum temperature threshold Ts min .

[0021] When the maximum value Tcell_max of the cell temperature is greater than or equal to the maximum temperature threshold Ts max , the energy comprehensive management module controls the liquid cooling unit to enter a refrigeration mode.

[0022] When the maximum value Tcell_max of the cell temperature is less than the maximum temperature threshold Ts max , and when the minimum value Tcell_min of the cell temperature is greater than the minimum temperature threshold Ts min , the energy comprehensive management module controls the liquid cooling unit to enter a self-circulation mode.

[0023] When the minimum value Tcell_min of the cell temperature is less than the minimum temperature threshold Ts min , the energy comprehensive management module controls the liquid cooling unit to enter a heating mode.

[0024] In a possible implementation, the refrigeration mode comprises:

[0025] The energy comprehensive management module controls the liquid cooling unit, sets a refrigeration point to T1, and sets a refrigeration sensitivity to T2.

[0026] The energy comprehensive management module controls an industrial dehumidifier to be turned on, and sets an opening humidity to RH1 and a stopping humidity to RH2.

[0027] It is judged by the visual system whether there is a condensation phenomenon.

[0028] If there is a condensation phenomenon, a dew point temperature T con， is calculated by the visual system and a signal is transmitted to the energy comprehensive management module, and the energy comprehensive management module controls the liquid cooling unit to set a water temperature refrigeration 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, the signal is transmitted to the energy integrated 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 integrated management module controls the liquid cooling unit, sets the cooling point to T1, the cooling sensitivity to T2, and the energy integrated 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 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 the energy integrated 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 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;

[0029] 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 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 integrated 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 integrated management module controls the liquid cooling unit, sets the cooling point to T1, and the cooling sensitivity to T2.

[0030] In a possible implementation, the self-circulation mode includes:

[0031] The energy integrated management module controls the industrial dehumidifier to start, and sets the start humidity to RH1 and the stop humidity to RH2;

[0032] Use the visual system to determine whether there is condensation;

[0033] If condensation occurs, the dew point temperature is calculated as T by the visual system. con， And transmit the signal to the energy integrated management module, the energy integrated 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 integrated management module;

[0034] 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 cell temperature in the plurality of battery modules and transmits them to the energy comprehensive management module.

[0035] In a possible implementation, the heating mode includes:

[0036] The energy comprehensive management module controls the liquid cooling unit, sets the water temperature heating point as T4, and sets the heating sensitivity as T5.

[0037] The energy comprehensive management module acquires 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 in real time.

[0038] It is determined whether the minimum value Tcell_min of the cell temperature is greater than T6.

[0039] If yes, the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the plurality of battery modules and transmits them to the energy comprehensive management module.

[0040] If no, the energy comprehensive management module controls the liquid cooling unit, sets the water temperature heating point as T4, and sets the heating sensitivity as T5, until the minimum value Tcell_min of the cell temperature is greater than T6.

[0041] The present application has the beneficial effects that: the present application controls the humidity in the cabinet by the dew point temperature, ensures that no condensate is generated in the cabinet in the plum rain season, uses the fire-fighting strong exhaust fan to forcibly exhaust the humidity and uses 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 whole life cycle of the battery by using the temperature and humidity joint control adjustment strategy scheme, and avoids the heat runaway and short circuit phenomenon. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0043] Figure 1 A structural schematic diagram of a liquid cooling industrial and commercial storage temperature and humidity control energy storage system is provided for the embodiments of the present application.

[0044] Figure 2 A flowchart of a temperature and humidity control method is provided for the embodiments of the present application.

[0045] Figure 3 The structural schematic diagram of the liquid-cooled industrial and commercial energy storage system control module provided by the embodiment of the present application is shown. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present application will be described in detail with reference to the drawings, which form a part of this description, and which are illustrative of embodiments of the present application and are not intended to limit the scope of the present application, as best understood from the detailed description.

[0047] The terms "first", "second", and the like, as used in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the descriptive terms "first", "second", etc., are to be interpreted, by those skilled in the art, as a structural or functional pertinence designation rather than a necessarily described sequential or chronological order. Thus, a first element discussed below could be termed a second element without departing from the teachings of the present application.

[0048] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is to be understood that embodiments described herein can be combined with other embodiments in each instance.

[0049] One specific embodiment of the present application, as shown in FIG. 1, provides a liquid-cooled industrial and commercial energy storage system, comprising: a cabinet structure and a pipeline structure; the cabinet structure comprises a direct current cabin 1, a temperature control cabin 2 and an alternating current cabin 3; the pipeline structure comprises a liquid outlet pipeline 4 and a liquid return pipeline 5. Figure 1

[0050] The direct current cabin 1 is provided with a plurality of battery modules 11, a battery control management module (Battery Management System, BMS), an energy comprehensive management module (Energy Management System, EMS), a fire-fighting fan 12, an industrial dehumidifier 13 and a visual system 14;

[0051] The temperature control cabin 2 is provided with a liquid-cooled unit 15; the energy comprehensive management module is in communication connection with the battery control management module, the fire-fighting fan, the industrial dehumidifier and the visual system;

[0052] The alternating current cabin 3 is provided with a high-voltage fusion PCS converter 16, an air inlet duct 17 and an air outlet duct 18, and the air inlet duct 17 and the air outlet duct 18 are arranged on both sides of the high-voltage fusion PCS converter 16;

[0053] The liquid outlet pipeline 4 and the liquid return pipeline 5 both penetrate the direct current cabin 1 and the temperature control cabin 2; ​

[0054] The energy comprehensive management module EMS is configured to collect the electrical signals transmitted by the battery control management module BMS, the fire-fighting fan 12, the liquid cooling unit 15, the industrial dehumidifier 13 and the visual system 14, and perform temperature and humidity control based on a preset temperature and humidity adjustment strategy according to the electrical signals.

[0055] It should be noted that the system is divided into three cabins, namely, a direct-current cabin 1, a temperature control cabin 2 and an alternating-current cabin 3. The three cabins are independent of each other and are connected to each other, and the cabinet structure is divided into three sub-cabin.

[0056] In some embodiments, the battery control management module is electrically connected with a plurality of battery modules 11, configured to collect the cell temperature signals of the plurality of batteries and transmit the cell temperature signals to the energy comprehensive management module. In a preferred embodiment, the number of battery modules 11 is 5.

[0057] In some embodiments, the industrial dehumidifier 13 is configured to suck the humid air in the closed space in the direct-current cabin 1 into the interior of the industrial dehumidifier 13 through a fan, and the humid air is cooled and dewed by a semiconductor refrigerator, the dew of the refrigerator is dripped into a water guide groove under the action of gravity, and then flows out of the cabinet through a water guide pipe, so as to reduce the humidity in the closed cabinet.

[0058] In some embodiments, the visual system 14 is configured to generate a condensation visual signal after detecting the condensation phenomenon of the water inlet and outlet of the plurality of battery modules 11 in the direct-current cabin 1, and calculate the dew point temperature, and convert the condensation visual signal and the dew point temperature into an electrical signal and transmit the electrical signal to the energy comprehensive management module.

[0059] In some embodiments, the fire-fighting fan 12 is used for fire-fighting and forced dehumidification, and is configured to use forced discharge of the humid air in the cabinet when the visual system 14 determines that the condensation phenomenon occurs and the humidity is too high.

[0060] It should be noted that the direct current cabin 1 comprises a battery module 11, a battery control system (BMS), an energy comprehensive management system (EMS), a fire-fighting fan 12, an industrial dehumidifier 13, a visual system 14 and part of the second and third liquid inlet and outlet pipelines 4; the temperature control cabin 2 comprises a liquid cooling unit 15 and the second liquid inlet and outlet pipeline 4, which is installed horizontally, and the low-temperature cooling liquid output by the liquid cooling unit 15 first enters the system second pipeline, passes through the yin and yang joints of the cabin to reach the battery module 11 in the direct current cabin 1 and the three-way position of the second pipeline, and then continues to flow into the cold plate flow channel inside the battery module 11 through the system third pipeline, and finally the cooling liquid heated through heat exchange flows out of the cold plate flow channel. The heated cooling liquid is finally returned to the system second pipeline, and then cooled through heat exchange between the fluorine road side of the liquid cooling unit 15 and the cooling unit. The heat of the fluorine road side is cooled by the fan of the external circulation condenser.

[0061] Please refer to Figure 3 , the energy comprehensive management system (EMS) collects the electrical signals of the battery control system (BMS), the liquid cooling unit 15, the converter PCS, the fire-fighting fan 12, the industrial dehumidifier 13 and the visual system 14, and realizes the overall temperature and humidity joint control and adjustment through the corresponding control strategy of the battery temperature and temperature adjustment, so as to maximize the safety of the battery in the direct current cabin 1 during the whole life cycle and avoid the occurrence of thermal runaway and short circuit.

[0062] Further, the industrial dehumidifier 13, the visual system 14 and the fire-fighting fan 12 have the function of controlling the humidity in the direct current cabin 1, avoiding the generation of condensate water due to too high humidity in the direct current cabin 1, which endangers the safety of the battery in the direct current cabin 1. The industrial dehumidifier 13 is used to suck the humid air in the closed space in the direct current cabin 1 into the interior of the industrial dehumidifier 13 through a fan, and the condensed water in the refrigeration unit is dripped into the water guide groove under the action of gravity, and then flows out of the cabinet through the water guide pipe, so as to reduce the humidity in the closed cabinet. The visual system 14 is used to detect the condensation phenomenon of the water inlet and outlet of the battery module 11 in the direct current cabin 1, calculate the dew point temperature, and convert the visual signal of the visual system 14 and the dew point temperature into an electrical signal and transmit it to the energy comprehensive management system (EMS). The fire-fighting fan 12 is used for fire-fighting and dehumidification, and it is only used to exhaust the humid air in the cabinet when the visual system 14 determines that the condensation phenomenon occurs and the humidity is too high. The dry node signal and the fire-fighting signal are independent of each other.

[0063] The high-voltage fusion PCS converter 16 realizes the fusion of the original functions of the sub-control box, and the internal devices of the sub-control box and the main circuit are integrated in the PCS, realizing the fusion of AC and DC high voltage, and the protection level is IP66, and the temperature control relies on the PCS internal fan speed control, so the temperature and humidity control of the DC cabin 1 room is irrelevant to the AC cabin 3 room.

[0064] To solve the above problems, the application also provides a temperature and humidity control method applied to the liquid-cooled industrial and commercial temperature and humidity control energy storage system, which can be specifically referred to Figure 2 The method comprises the following steps.

[0065] Based on the energy comprehensive management module, the battery control management module, the fire-fighting fan 12, the industrial dehumidifier 13 and the visual system 14 transmit electrical signals, and based on the preset temperature and humidity adjustment strategy, the temperature and humidity are controlled according to the electrical signals.

[0066] Specifically, based on the preset temperature and humidity adjustment strategy, the temperature and humidity are controlled according to the electrical signals, which comprises the following steps.

[0067] In the case that the energy comprehensive management module and the liquid-cooled unit 15, the fire-fighting fan 12 and the visual system 14 are in normal communication, the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the battery module 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 comprises a maximum temperature threshold Ts max and a minimum temperature threshold Ts min .

[0068] When the maximum value Tcell_max of the cell temperature is greater than or equal to the maximum temperature threshold Ts max , the energy comprehensive management module controls the liquid-cooled unit 15 to enter the refrigeration mode.

[0069] When the maximum value Tcell_max of the cell temperature is less than the maximum temperature threshold Ts max , and when the minimum value Tcell_min of the cell temperature is greater than the minimum temperature threshold Ts min , the energy comprehensive management module controls the liquid-cooled unit 15 to enter the self-circulation mode.

[0070] When the minimum value Tcell_min of the cell temperature is less than the minimum temperature threshold Ts min , the energy comprehensive management module controls the liquid-cooled unit 15 to enter the heating mode.

[0071] Specifically, the refrigeration mode comprises the following steps.

[0072] The energy comprehensive management module controls the liquid cooling unit 15, sets the refrigeration point as T1, and the refrigeration sensitivity as T2.

[0073] The energy comprehensive management module controls the industrial dehumidifier 13 to start, and sets the starting humidity as RH1 and the stopping humidity as RH2.

[0074] The visual system 14 judges whether there is condensation phenomenon.

[0075] If there is condensation phenomenon, the visual system 14 calculates the dew point temperature as T con， and transmits a signal to the energy comprehensive management module, which controls the liquid cooling unit 15 to set the water temperature refrigeration point as T con , the refrigeration sensitivity as T2; and continues to judge whether the maximum value Tcell_max of the cell temperature is less than the maximum threshold value T3 (slightly less than Tsmax) of the cell refrigeration mode, if yes, transmits a signal to the energy comprehensive management module to continue to acquire the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the battery module 11 collected by the battery control management module in real time, if no, the energy comprehensive management module controls the liquid cooling unit 15 to set the refrigeration point as T1, the refrigeration sensitivity as T2, and controls the fire-fighting fan 12 to start to forcibly dehumidify, and controls the visual system 14 to continuously judge whether there is condensation phenomenon, and stops dehumidifying when there is no condensation phenomenon, and after there is no condensation phenomenon, the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the battery module 11 collected by the battery control management module are judged whether the maximum value Tcell_max of the cell temperature is less than T3, if yes, transmits a signal to the energy comprehensive management module to continue to acquire the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the battery module 11 collected by the battery control management module in real time, if no, the energy comprehensive management module controls the liquid cooling unit 15 to set the refrigeration point as T1, the refrigeration sensitivity as T2.

[0076] If there is no condensation phenomenon, the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the battery module 11 collected by the battery control management module are judged whether the maximum value Tcell_max of the cell temperature is less than T3, if yes, transmits a signal to the energy comprehensive management module to continue to acquire the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the battery module 11 collected by the battery control management module in real time, if no, the energy comprehensive management module controls the liquid cooling unit 15 to set the refrigeration point as T1, the refrigeration sensitivity as T2.

[0077] Specifically, the self-circulation mode includes:

[0078] The energy comprehensive management module controls the industrial dehumidifier 13 to start, and sets the starting humidity as RH1 and the stopping humidity as RH2.

[0079] The visual system 14 judges whether there is condensation phenomenon or not.

[0080] If there is condensation phenomenon, the visual system 14 calculates the dew point temperature as T con， and transmits a signal to the energy comprehensive management module, which controls the liquid cooling unit 15 to set the water temperature refrigeration point as T con , and 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 11 and transmits them to the energy comprehensive management module.

[0081] 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 cell temperature in the several battery modules 11 and transmits them to the energy comprehensive management module.

[0082] Specifically, the heating mode includes:

[0083] The energy comprehensive management module controls the liquid cooling unit 15 to set the water temperature heating point as T4 and the heating sensitivity as T5.

[0084] The energy comprehensive management module obtains the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature in the several battery modules 11 collected by the battery control management module in real time.

[0085] It is judged whether the minimum value Tcell_min of the cell temperature is greater than the minimum threshold T6 (slightly greater than Tsmin) of the cell heating mode.

[0086] If yes, 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 11 and transmits them to the energy comprehensive management module.

[0087] If no, the energy comprehensive management module controls the liquid cooling unit 15 to set the water temperature heating point as T4 and the heating sensitivity as T5 until the minimum value Tcell_min of the cell temperature is greater than T6.

[0088] In order to further explain the principle of the control method, the following is explained again:

[0089] The temperature and humidity linkage control mode is that the energy comprehensive management system (EMS) communicates with the battery control system (BMS), the liquid cooling unit 15, the industrial dehumidifier 13, the fire-fighting fan 12 and the visual system 14 in real time, collects the maximum cell temperature Tcell_max and the minimum cell temperature Tcell_min, and selects different temperature and humidity linkage control modes according to the highest temperature and the lowest temperature of the cell. When T cell_max≥Tsmax, the liquid cooling unit 15 is controlled to start and enter the refrigeration mode, the EMS controls the water temperature of the liquid cooling unit 15 to be T1, the refrigeration sensitivity is T2, and the industrial dehumidifier 13 is controlled to start, the starting humidity of the industrial dehumidifier 13 is RH1, and the stopping humidity is RH2. The visual system 14 detects and judges the condensation phenomenon of the water inlet and outlet of the battery module 11 in the direct current cabin 1, and transmits the judgment signal to the EMS. If there is no condensation phenomenon, the maximum cell temperature Tcell_max and the minimum cell temperature T cell_min are collected in real time, and the condition is met to exit. If there is condensation phenomenon at the water inlet and outlet of the battery module 11 in the direct current cabin 1, the visual system 14 calculates the dew point temperature according to the temperature and humidity in the cabinet, the EMS controls the liquid cooling unit 15 to be in the refrigeration mode, the water temperature refrigeration point is the dew point temperature Tcon, the refrigeration sensitivity is T2, the maximum cell temperature Tcell_max and the minimum cell temperature T cell_min are collected in real time, and the condition Tcell_max<T3 is met to exit. If not, the EMS controls the water temperature refrigeration point of the liquid cooling unit 15 to be T1, the refrigeration sensitivity is T2, and controls the fire-fighting fan 12 to forcibly dehumidify and reduce the humidity in the direct current cabin 1 until the visual system 14 detects no condensation phenomenon at the water inlet and outlet of the battery module 11 in the direct current cabin 1 to exit.

[0090] When T cell_max<Tsmax&Tmin>Tsmin, the EMS controls the liquid cooling unit 15 to enter the self-circulation mode, and controls the industrial dehumidifier 13 to start, the starting humidity of the industrial dehumidifier 13 is RH1, and the stopping humidity is RH2. The visual system 14 detects and judges the condensation phenomenon of the water inlet and outlet of the battery module 11 in the direct current cabin 1, and transmits the judgment signal to the EMS. If there is no condensation phenomenon, the EMS controls the water temperature of the liquid cooling unit 15 to be T1, the refrigeration sensitivity is T2, and controls the fire-fighting fan 12 to forcibly dehumidify and reduce the humidity in the direct current cabin 1 until the visual system 14 detects no condensation phenomenon at the water inlet and outlet of the battery module 11 in the direct current cabin 1 to exit.

[0091] When Tmin≤Tsmin, the liquid cooling unit 15 is started to enter the heating mode regardless of the state of the battery system, the heating wire is turned on, the water temperature heating point is T4, and the water temperature heating sensitivity is T5. The heating mode is exited after meeting the conditions. Since the battery system is usually in the heating mode in winter, the ambient temperature in winter is relatively lower than the water temperature, so the condensation phenomenon does not occur. The maximum cell temperature Tmax, the minimum cell temperature Tmin, the visual system 14, and the industrial dehumidifier 13 are used to select different working modes of the liquid cooling unit 15 and the fire-fighting fan 12, so as to realize the temperature and humidity combined control and adjustment of the overall liquid cooling industrial energy storage system, avoid unnecessary energy loss and heat management loss, realize the adjustment of the overall circulating power and heat dissipation power, maximize the safety of the full life cycle of the direct current cabin 1 room battery, and avoid the occurrence of thermal runaway and short circuit phenomenon.

[0092] In summary, the liquid cooling industrial energy storage temperature and humidity control system and method provided by the present application controls the humidity in the cabinet through the dew point temperature, ensures that no condensate water is generated in the cabinet in the plum rain season, uses the forced dehumidification of the fire-fighting fan and the humidity control means of the visual system to ensure that the dew point temperature in the cabinet is lower than the outlet water temperature of the liquid cooling unit, and uses the temperature and humidity combined control and adjustment strategy scheme to maximize the safety of the full life cycle of the battery and avoid the occurrence of thermal runaway and short circuit phenomenon.

[0093] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical range disclosed by the present application can be easily thought of by those skilled in the art, and should be covered within the protection scope of the present application.

Claims

1. A liquid-cooled industrial temperature and humidity controlled energy storage system, comprising: The application relates to a cabinet structure and a pipeline structure; the cabinet structure comprises a direct-current cabin, a temperature control cabin and an alternating-current cabin; the pipeline structure comprises a liquid outlet pipeline and a liquid return pipeline; A plurality of battery modules, a battery control management module, an energy comprehensive management module, a fire-fighting fan, an industrial dehumidifier and a visual system are arranged in the direct-current cabin; A liquid cooling unit is arranged in the temperature control cabin; the energy comprehensive management module is in communication connection with the battery control management module, the fire-fighting fan, the liquid cooling unit, the industrial dehumidifier and the visual system; A high-voltage fusion PCS converter, an air inlet air duct and an air outlet air duct are arranged in the alternating-current cabin; the air inlet air duct and the air outlet air duct are arranged on the two sides of the high-voltage fusion PCS converter; The liquid outlet pipeline and the liquid return pipeline penetrate the direct-current cabin and the temperature control cabin; The energy comprehensive management module is used for collecting electric signals transmitted by the battery control management module, the fire-fighting fan, the liquid cooling unit, the industrial dehumidifier and the visual system, and performing temperature and humidity control according to the electric signals based on a preset temperature and humidity adjusting strategy; The battery control management module is electrically connected with the plurality of battery modules, is used for collecting cell temperature signals of the plurality of batteries, and transmits the cell temperature signals to the energy comprehensive management module; The industrial dehumidifier is used for absorbing humid air in a closed space in the direct-current cabin into the industrial dehumidifier through a fan, and the humid air is cooled and dewed by a semiconductor refrigerator; the dew of the refrigerator drops into a water guide groove under the action of gravity, and then flows out of the cabinet through a water guide pipe, so that the humidity in the closed cabinet is reduced; The visual system is used for detecting the condensation phenomenon of the water inlets and outlets of the plurality of battery modules in the direct-current cabin, generating a condensation visual signal, calculating a dew point temperature, and converting the condensation visual signal and the dew point temperature into an electric signal and transmitting the electric signal to the energy comprehensive management module; The fire-fighting fan is used for fire fighting and forced dehumidification, and is used for forcibly discharging the humid air in the cabinet when the visual system determines that the condensation phenomenon occurs and the humidity is too high. The method comprises the following steps:

2. A temperature and humidity control method applied to the liquid-cooled industrial and commercial temperature and humidity control energy storage system according to claim 1, characterized in that, The energy comprehensive management module collects electric signals transmitted by the battery control management module, the fire-fighting fan, the liquid cooling unit, the industrial dehumidifier and the visual system, and performs temperature and humidity control according to the electric signals based on a preset temperature and humidity adjusting strategy. The temperature and humidity control based on the preset temperature and humidity adjusting strategy according to the electric signals comprises the following steps:

3. The temperature and humidity control method according to claim 2, wherein The refrigeration mode comprises the following steps: In the case that the energy comprehensive management module is in normal communication 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 plurality of battery modules collected by the battery control management module are acquired in real time, and the maximum value Tcell_max and the minimum value Tcell_min of the cell temperature are compared with preset cell temperature thresholds, wherein the cell temperature thresholds include a maximum temperature threshold Ts max and a minimum temperature threshold Ts min . When the maximum value Tcell_max of the cell temperature is greater than or equal to the maximum temperature threshold Ts max , the energy integrated management module controls the liquid cooling unit to enter the refrigeration mode. when a maximum value Tcell max of the battery cell temperature is less than the maximum temperature threshold Ts max , and when a minimum value Tcell min of the battery cell temperature is greater than the minimum temperature threshold Ts min , the energy integrated management module controls the liquid cooling unit to enter a self-circulation mode. When the minimum value Tcell_min of the cell temperature is less than the minimum temperature threshold Ts min The energy integrated management module controls the liquid cooling unit to enter the heating mode.

4. The temperature and humidity control method according to claim 3, wherein The energy comprehensive management module controls the liquid cooling unit, sets a refrigeration point as T1, and sets a refrigeration sensitivity as T2; The energy comprehensive management module controls the industrial dehumidifier to be started, sets a starting humidity as RH1, and sets a stopping humidity as RH2; Whether the condensation phenomenon exists is judged through the visual system; ​ If there is condensation phenomenon, the dew point temperature is calculated by the visual system as T con， and a signal is transmitted to the energy comprehensive management module, which controls the liquid cooling unit to set the refrigeration point as T con , and the refrigeration sensitivity as T2; and continues to determine whether the maximum value of the cell temperature Tcell_max is less than T3, if yes, a signal is transmitted to the energy comprehensive management module to continue to acquire the maximum value and minimum value of the cell temperature in the battery module collected by the battery control management module, if no, the energy comprehensive management module controls the liquid cooling unit to set the refrigeration point as T1, and the refrigeration sensitivity as T2, and controls the fire-fighting fan to start to forcibly dehumidify, and controls the visual system to continuously determine whether there is condensation phenomenon, until there is no condensation phenomenon, then the maximum value and minimum value of the cell temperature in the battery module collected by the battery control management module are determined whether the maximum value of the cell temperature Tcell_max is less than T3, if yes, a signal is transmitted to the energy comprehensive management module to continue to acquire the maximum value and minimum value of the cell temperature in the battery module collected by the battery control management module, if no, the energy comprehensive management module controls the liquid cooling unit to set the refrigeration point as T1, and the refrigeration sensitivity as T2; 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, judges whether the maximum value Tcell_max of the battery cell temperature is less than T3, if yes, the energy comprehensive management module continues to acquire the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the plurality of battery modules collected by the battery control management module in real time, if no, the energy comprehensive management module controls the liquid cooling unit, sets the refrigeration point to T1 and the refrigeration sensitivity to T2.

5. The temperature and humidity control method according to claim 3, wherein The self-circulation mode includes: The energy comprehensive management module controls the industrial dehumidifier to be turned on, and sets the opening humidity to RH1 and the stop humidity to RH2; Whether there is a condensation phenomenon is judged through a visual system; If the condensation phenomenon exists, the dew point temperature is calculated as T by the vision system con， and a signal is transmitted to the energy comprehensive management module, which controls the liquid cooling unit to set the water temperature refrigeration point as T con , and the battery control management module collects the maximum value Tcell_max and the minimum value Tcell_min of the 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.

6. The temperature and humidity control method according to claim 3, wherein The heating mode includes: The energy comprehensive management module controls the liquid cooling unit, sets the water temperature heating point to T4 and the heating sensitivity to T5; The energy comprehensive management module acquires the maximum value Tcell_max and the minimum value Tcell_min of the battery cell temperature in the plurality of battery modules collected by the battery control management module in real time; Whether the minimum value Tcell_min of the battery cell temperature is greater than T6 is judged; 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 comprehensive management module; If no, the energy comprehensive management module controls the liquid cooling unit, sets the water temperature heating point to T4 and the heating sensitivity to T5, until the minimum value Tcell_min of the battery cell temperature is greater than T6.

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