A method for controlling temperature and humidity of energy storage and battery replacement stations

Abstract

The present application relates to a method for controlling temperature and humidity in an energy storage and battery swap station, including the following method: the operation method of the PTC heating mode of a battery pack group and a control room is as follows: when the temperature in any battery pack of the battery pack group satisfies t1<15℃ and t<‑20℃, the water pump and the PTC heater in the liquid cooling host work and the heating function is turned on. When t1>20℃, the PTC in the host stops heating. When the temperature in the control room is t2<T‑2℃ and t4<‑20℃, the PTC heater and the fan in the temperature control and dehumidification module work to heat the air in the control room. When t2≥T+2℃, the PTC heater stops working. The structure provided in the embodiment of the present application centrally controls the thermal management of the battery pack in the energy storage field or battery swap station, the temperature and humidity of places such as the battery compartment, the control room and the lounge. The control cabinet in the host automatically controls the speed of the compressor according to the parameters detected by the temperature and humidity sensor, and performs intelligent control to ensure that the temperature in the battery pack and the temperature and humidity in the cabin meet the requirements.

Description

Technical Field

[0001] The present application relates to the technical field of temperature and humidity control, and in particular to a method for controlling temperature and humidity in an energy storage and battery swap station. Background Art

[0002] With the rapid development of the new energy industry, energy storage and battery swap stations have been established in various regions. In order to improve battery charging efficiency and reduce heat loss, the charging temperature will be controlled within the range of 25-30°C. At the same time, the temperature and humidity in the battery compartment must be controlled to ensure that the battery pack is in a good external environment; the temperature and humidity in the control room must be controlled to ensure that the personnel are in a comfortable working environment.

[0003] The function of the temperature and humidity control system is to control the charging temperature of the battery pack during charging. If the charging temperature of the battery pack is lower than 15°C, the thermal management system outputs a higher temperature circulating fluid through its temperature control module to exchange heat with the battery pack to increase its charging temperature; if the battery pack temperature is higher than 30°C during charging, the thermal management system outputs a lower temperature circulating fluid to exchange heat with the battery pack to reduce its charging temperature.

[0004] In addition to ensuring the temperature of the battery pack, the temperature and humidity in the battery compartment and control room also need to be controlled. To ensure a comfortable temperature, the temperature is generally controlled at no higher than 26°C in summer and no lower than 15°C in winter, and the humidity is controlled within 45%-75%. At present, water cooling units are generally used to cool and heat the battery pack. The battery compartment and control room mostly use household air-conditioning units. In cold areas, auxiliary measures such as air heaters are also required. Dehumidification in summer relies on air-conditioning units, which is not ideal in areas with high humidity in the south. Adding an independent dehumidifier can easily lead to problems such as the inability to accurately control the temperature and complex operation. In addition, each device is independently controlled and operated, and cannot be centrally managed. Space utilization and energy consumption will be wasted. Therefore, we propose a temperature and humidity control method for energy storage and battery swap stations. Summary of the invention

[0005] The present application provides a temperature and humidity control method for an energy storage and battery swap station to solve the above-mentioned problems.

[0006] The present application provides a method for controlling temperature and humidity in an energy storage and battery swap station, which is characterized by comprising the following methods:

[0007] S1, battery pack and control room PTC heating mode operation method is as follows:

[0008] When the temperature in any battery pack of the battery pack group meets t1<15℃ and t<-20℃, the water pump and PTC heater in the liquid-cooled host work and the heating function is turned on. When t1>20℃, the PTC in the host stops heating. After 30s of self-circulation, the host stops running.

[0009] When the control room temperature t2<T-2℃ and t4<-20℃, the PTC heater and fan in the temperature control dehumidification module work to heat the control room air. When t2≥T+2℃, the PTC heater stops working and the fan stops working after 30s. Among them: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value;

[0010] S2, battery pack and control room heating heat pump mode operation method is as follows:

[0011] When the temperature in any battery pack of the battery pack group meets t1<15℃ and the ambient temperature t≥-20℃, and the temperature in the control room meets -20℃≤t4≤5℃ and t2<t3-2℃, the four-way reversing valve of the liquid-cooled host is powered on and starts working in heating mode. At the same time, the second solenoid valve in the liquid-cooled host and the fourth solenoid valve in the temperature-control dehumidification module work, and the first solenoid valve in the liquid-cooled host and the third solenoid valve in the temperature-control dehumidification module do not work. The air in the cabin exchanges heat with the high-temperature evaporator in the temperature-control dehumidification module to heat the air temperature in the cabin.

[0012] When the temperature inside the battery pack t1>20℃, and the temperature inside the battery compartment t2<t3-2℃, the water pump and electronic expansion valve in the liquid cooling host will stop working after a delay of 30s, the compressor will continue to work, and the fan and electronic expansion valve in the temperature control and dehumidification module will continue to work;

[0013] When the temperature inside the battery pack t1≤20℃, and the temperature inside the battery compartment t2≥t3+2℃, the second solenoid valve in the liquid cooling host and the fourth solenoid valve in the temperature control and dehumidification module are powered off and stop working, and then the fan in the temperature control and dehumidification module stops running after a delay of 30s, while the compressor, water pump, and axial flow fan in the liquid cooling host continue to run;

[0014] When the temperature inside the battery pack t1>20℃, and the temperature inside the battery compartment t2≥t3+2℃, the compressor and axial fan in the liquid cooling host stop working, the water pump stops working after a delay of 30s, and the fan in the temperature control and dehumidification module stops working after a delay of 30s, and then the second solenoid valve and battery valve 4 are powered off and closed;

[0015] Where: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room indoor temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value;

[0016] S3, battery pack cooling, battery compartment and control room heating automatic mode operation method is as follows:

[0017] When the temperature inside the battery pack is t1>28℃, the temperature inside the battery compartment is t≤5℃ and t2<t3-2℃, the four-way valve in the liquid cooling host is not powered on and operates in cooling mode, providing low-temperature coolant for the battery pack to reduce the temperature inside the battery pack core, the solenoid valves in the liquid cooling host and the temperature and humidity control module do not work, and the PTC heater in the temperature and humidity control module works to heat the air in the battery compartment;

[0018] When the temperature inside the battery pack is less than 25°C, the battery pack exits the cooling mode, the compressor stops running, and the water pump and axial flow fan stop running after a delay of 30 seconds;

[0019] When the temperature in the battery compartment is t2≥t3+2, the PTC heater in the temperature control and dehumidification module stops running, and the fan stops running after a delay of 30s;

[0020] Where: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room indoor temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value;

[0021] S4, battery pack cooling, battery compartment and control room cooling mode operation method is as follows:

[0022] When the temperature inside the battery pack t1>28℃, the temperature inside the battery compartment t3+2℃≤t2 and t2≥24℃, that is, when the battery pack, battery compartment and control room all have cooling requirements, the four-way valve in the liquid cooling host is not powered on and operates in cooling mode to reduce the temperature inside the battery pack core;

[0023] When the temperature inside the battery pack t1 is less than 25°C and the temperature inside the battery compartment is t3+2°C≤t2 and t2≥24°C, the water pump and electronic expansion valve in the liquid cooling host stop running, and the other components remain in operation;

[0024] When the temperature inside the battery pack t1>28℃ and the temperature inside the battery compartment t2≤t3-2℃ or t4≤18℃, the second solenoid valve in the liquid cooling host and the fourth solenoid valve in the temperature control and dehumidification module are powered off and stop working, and then the fan in the temperature control and dehumidification module stops running after a delay of 30s, and the compressor, water pump and axial flow fan in the liquid cooling host continue to run.

[0025] When the temperature inside the battery pack is t1<25℃ and the temperature inside the battery compartment is t2≤t3-2℃ or t4≤18℃, the compressor and axial flow fan stop running, the second solenoid valve in the liquid cooling host and the fourth solenoid valve in the temperature control and dehumidification module are powered off and stop working, and the water pump and the fan in the temperature control and dehumidification module stop running after a delay of 30s;

[0026] Where: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room indoor temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value;

[0027] S5, battery pack cooling, battery compartment and control room dehumidification mode operation method is as follows:

[0028] When the temperature inside the battery pack t1>28℃, the humidity inside the battery compartment T≥T1+10%, and 0≤t2≤24℃, the four-way valve in the liquid cooling host will not be powered on and will operate in cooling mode to reduce the temperature inside the battery pack core;

[0029] When the temperature inside the battery pack t1 is less than 25°C and the temperature and humidity inside the battery compartment meet T≥T1+10% and t2 is less than 28°C, the water pump, axial flow fan and electronic expansion valve in the liquid cooling host stop running, the compressor keeps running, and the fan and electronic expansion valve in the thermostatic dehumidification module keep running;

[0030] When the temperature in the battery pack t1>28℃ and the temperature and humidity in the battery compartment meet T≤T1-10% or t2≥28℃, the first solenoid valve in the liquid cooling host and the third solenoid valve in the temperature control and dehumidification module are powered off and stop working, and then the fan in the temperature control and dehumidification module stops running after a delay of 30s, and the compressor, water pump and axial flow fan in the liquid cooling host continue to run;

[0031] When the temperature inside the battery pack t1 is less than 25°C and the temperature and humidity inside the battery compartment meet T≤T1-10% or t2≥28°C, the compressor and axial flow fan stop running, the first solenoid valve in the liquid cooling host and the third solenoid valve in the temperature control and dehumidification module are powered off and stop working, and the water pump and the fan in the temperature control and dehumidification module stop running after a delay of 30s;

[0032] Where: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room indoor temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value;

[0033] S6, battery compartment and control room humidification mode operation

[0034] When the temperature and humidity in the battery compartment meet ≤T1-10% and t2≥3℃, the temperature control and dehumidification module automatically turns on the humidification working mode, where: T1 represents the humidity setting value, and t2 represents the control room temperature value

[0035] The control system of the energy storage and battery swap station temperature and humidity control method includes a water-cooled host module, a battery compartment and a control room. The water-cooled host module temperature and humidity control connects the battery compartment and the control room. The battery compartment and the control room are both provided with temperature and humidity control modules of the same structure. The battery compartment is also provided with a battery pack group. The battery compartment and the control room are provided with temperature and humidity sensors.

[0036] The main body of the water-cooled host module includes a water tank, a heat exchanger, a first evaporator, a PTC heater group, a compressor, a first solenoid valve, a host condenser, a host electronic expansion valve and a second solenoid valve. The water tank is connected to the first evaporator through a valve group, and the liquid outlet of the first evaporator is connected to the PTC heater group through a pipeline, and the PTC heater group is connected to the battery pack group inside the battery compartment through a pipeline, and the liquid outlet of the battery pack group is also connected to the water tank through a pipeline to form a closed loop;

[0037] The compressor is connected to the inlet of the four-way reversing valve, one of the other three outlets of the four-way reversing valve is connected to the host condenser through a pipeline, the outlet of the host condenser is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the host electronic expansion valve through a pipeline, the host electronic expansion valve is connected to the first evaporator through a pipeline, and the other interface of the first evaporator and the interface of the battery compartment and the control room are connected to the four-way reversing valve through a three-way pipeline, the middle outlet of the four-way reversing valve is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the compressor through a pipeline, the first solenoid valve and the second solenoid valve are connected to the battery compartment and the control room through a three-way pipeline, and the first solenoid valve is also connected to the host condenser and the outlet of the four-way reversing valve through a pipeline, and the second solenoid valve is connected to the outlet of the host condenser through a pipeline;

[0038] The temperature and humidity control module includes a second evaporator, a condenser, a PTC heater, a humidifier, a third solenoid valve, a fourth solenoid valve, an electronic expansion valve and a drying filter. The second evaporator is connected to the outlet of the four-way reversing valve of the water-cooled host module through a pipeline, and the second evaporator is connected to the electronic expansion valve. The electronic expansion valve is divided into two ways through a pipeline tee, one way is connected to the drying filter through a pipeline, the drying filter is connected to the condenser, the condenser is connected to the third solenoid valve, and the other way of the electronic expansion valve is connected to the fourth solenoid valve. The third solenoid valve and the fourth solenoid valve are connected in parallel and connected to the first solenoid valve and the second solenoid valve through a pipeline; the PTC heater, the humidifier and the second evaporator are installed and fixed together;

[0039] The battery pack group includes multiple groups of battery packs, and the inlet pipe of each group of battery packs is connected to a manual ball valve Q and an electric ball valve V, and the outlet pipe of the battery pack is provided with other manual ball valves.

[0040] Preferably, the outlet of the host condenser is also connected to a frequency converter radiator, and an axial flow fan is also provided on the outside of the host condenser, and the outlet of the frequency converter radiator is also connected to a drying filter through a pipeline.

[0041] Preferably, an exhaust thermometer TK2, an exhaust pressure gauge PK1 and a detection valve 2 are provided on the pipeline between the four-way reversing valve and the first solenoid valve and the main engine condenser, and an intake pressure gauge PK2 and an intake thermometer TK2 are provided on the pipeline between the compressor and the heat exchanger.

[0042] Preferably, the valve group includes a group of butterfly valves D1, check valves Z1, water pumps 1 and butterfly valves D1 and another group of butterfly valves D2, check valves Z2, water pumps 2 and butterfly valves D2 connected in sequence, and a water pump outlet pressure gauge PL1 and a water pump inlet pressure gauge PL1 are respectively provided at both ends of the valve group.

[0043] Preferably, a unit return liquid thermometer TL1 is also provided on the water inlet pipe of the water tank.

[0044] Preferably, the liquid outlet pipe connected to the PTC heater group is provided with a manual ball valve Q54, a unit liquid outlet thermometer TL11, a Y-type filter, a manual liquid discharge ball valve Q52 and a butterfly valve D5.

[0045] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0046] The structure provided in the embodiment of the present application centrally controls the thermal management of battery packs in energy storage fields or battery swap stations, and the temperature and humidity of places such as battery compartments, control rooms, and lounges. The temperature control and dehumidification modules installed in the battery compartments, control rooms, and lounges share some refrigerant systems such as compressors with the water-cooled host of the battery thermal management. The control cabinet in the host automatically controls the compressor speed, solenoid valve switching, fan and water pump speed control, etc. according to the parameters detected by the temperature and humidity sensors, and performs intelligent control to ensure that the temperature in the battery pack and the temperature and humidity in the cabin meet the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0048] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0049] Figure 1 This is a schematic diagram of the water-cooled host structure of the present invention;

[0050] Figure 2 This is a diagram of the internal structure of the battery compartment and the control room of the present invention;

[0051] Figure 3 The schematic diagram for starting the regulation of the operating method of the present invention. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0053] Various embodiments of the present application may exist in the form of a range. It should be understood that the description in the form of a range is only for convenience and simplicity and should not be understood as a hard limit to the scope of the present application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single values ​​within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which are applicable regardless of the range. In addition, whenever a numerical range is indicated in the present application, it is meant to include any quoted numbers (fractions or integers) within the indicated range. Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present application, etc., can be purchased from the market or can be prepared by existing equipment.

[0054] In the present application, in the absence of any contrary description, the directional words used, such as "upper" and "lower", are specifically the directions of the drawings in the accompanying drawings. In addition, in the present application, the terms "include", "comprise", etc. refer to "including but not limited to". In the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A, B can be singular or plural. In the present application, "at least one" refers to one or more, and "plural" refers to two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular items or plural items. For example, "at least one of a, b, or c" or "at least one of a, b and c" can both mean: a, b, c, ab, i.e. a and b, ac, bc, or abc, where a, b, c can be single or plural, respectively.

[0055] like Figure 1-Figure 3 As shown, the embodiment of the present application provides a method for controlling temperature and humidity of an energy storage and battery swap station, including the following method:

[0056] S1. The operation method of the battery pack and control room PTC heating mode is as follows:

[0057] When the temperature in any battery pack of the battery pack group meets t1<15℃ and t<-20℃, the water pump and PTC heater in the liquid-cooled host work and the heating function is turned on. When t1>20℃, the PTC in the host stops heating. After 30s of self-circulation, the host stops running.

[0058] When the control room temperature t2<T-2℃ and t4<-20℃, the PTC heater and fan in the temperature control dehumidification module work to heat the control room air. When t2≥T+2℃, the PTC heater stops working and the fan stops working after 30s. Among them: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value;

[0059] S2, battery pack and control room heating heat pump mode operation method is as follows:

[0060] When the temperature in any battery pack of the battery pack group meets t1<15℃ and the ambient temperature t≥-20℃, and the temperature in the control room meets -20℃≤t4≤5℃ and t2<t3-2℃, the four-way reversing valve of the liquid-cooled host is powered on and starts working in heating mode. At the same time, the second solenoid valve in the liquid-cooled host and the fourth solenoid valve in the temperature-control dehumidification module work, and the first solenoid valve in the liquid-cooled host and the third solenoid valve in the temperature-control dehumidification module do not work. The air in the cabin exchanges heat with the high-temperature evaporator in the temperature-control dehumidification module to heat the air temperature in the cabin.

[0061] At the same time, the second solenoid valve in the liquid cooling host and the fourth solenoid valve in the temperature control and dehumidification module work, while the first solenoid valve in the liquid cooling host and the third solenoid valve in the temperature control and dehumidification module do not work. The refrigerant enters the evaporator of the temperature control and dehumidification module and then returns to the inside of the liquid cooling host through the electronic expansion valve, the fourth solenoid valve and the second solenoid valve. The air in the cabin exchanges heat with the high-temperature evaporator in the temperature control and dehumidification module to heat the air temperature in the cabin.

[0062] When the temperature inside the battery pack t1>20℃, and the temperature inside the battery compartment t2<t3-2℃, the water pump and electronic expansion valve in the liquid cooling host will stop working after a delay of 30s, the compressor will continue to work, and the fan and electronic expansion valve in the temperature control and dehumidification module will continue to work;

[0063] When the temperature inside the battery pack t1≤20℃, and the temperature inside the battery compartment t2≥t3+2℃, the second solenoid valve in the liquid cooling host and the fourth solenoid valve in the temperature control and dehumidification module are powered off and stop working, and then the fan in the temperature control and dehumidification module stops running after a delay of 30s. The compressor, water pump, and axial flow fan in the liquid cooling host continue to run;

[0064] When the temperature inside the battery pack t1>20℃, and the temperature inside the battery compartment t2≥t3+2℃, the compressor and axial fan in the liquid cooling host stop working, the water pump stops working after a delay of 30s, and the fan in the temperature control and dehumidification module stops working after a delay of 30s, and then the second solenoid valve and battery valve 4 are powered off and closed;

[0065] Where: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room indoor temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value;

[0066] S3, battery pack cooling, battery compartment and control room heating automatic mode operation method is as follows:

[0067] When the temperature inside the battery pack is t1>28℃, the temperature inside the battery compartment is t≤5℃ and t2<t3-2℃, the four-way valve in the liquid cooling host is not powered on and operates in cooling mode, providing low-temperature coolant for the battery pack to reduce the temperature inside the battery pack core. The solenoid valves in the liquid cooling host and the temperature and humidity control module do not work, and the PTC heater in the temperature and humidity control module works to heat the air in the battery compartment;

[0068] When the temperature inside the battery pack is less than 25°C, the battery pack exits the cooling mode, the compressor stops running, and the water pump and axial flow fan stop running after a delay of 30 seconds;

[0069] When the temperature in the battery compartment is t2≥t3+2, the PTC heater in the temperature control and dehumidification module stops running, and the fan stops running after a delay of 30s;

[0070] Where: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room indoor temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value;

[0071] S4, battery pack cooling, battery compartment and control room cooling mode operation method is as follows:

[0072] When the temperature inside the battery pack t1>28℃, the temperature inside the battery compartment t3+2℃≤t2 and t2≥24℃, that is, when the battery pack, battery compartment and control room all have cooling requirements, the four-way valve in the liquid cooling host is not powered on and operates in cooling mode to reduce the temperature inside the battery pack core;

[0073] At the same time, the second solenoid valve in the liquid cooling host and the fourth solenoid valve in the temperature control and dehumidification module are working, while the first solenoid valve in the liquid cooling host and the third solenoid valve in the temperature control and dehumidification module are not working. The liquid refrigerant in the liquid cooling host that has passed through the condenser flows into the temperature control and dehumidification module through the second solenoid valve, and enters the electronic expansion valve through the fourth solenoid valve. The throttled low-temperature refrigerant enters the evaporator in the temperature control and dehumidification module to form low-temperature gas and then returns to the liquid cooling host pipeline. At the same time, the fan in the temperature control and dehumidification module circulates the air in the battery compartment and the control room through the evaporator in the temperature control and dehumidification module to reduce the temperature in the compartment.

[0074] When the temperature inside the battery pack t1 is less than 25°C and the temperature inside the battery compartment is t3+2°C≤t2 and t2≥24°C, the water pump and electronic expansion valve in the liquid cooling host stop running, and the other components remain in operation;

[0075] When the temperature inside the battery pack t1>28℃ and the temperature inside the battery compartment t2≤t3-2℃ or t4≤18℃, the second solenoid valve in the liquid cooling host and the fourth solenoid valve in the temperature control and dehumidification module are powered off and stop working, and then the fan in the temperature control and dehumidification module stops running after a delay of 30s. The compressor, water pump and axial flow fan in the liquid cooling host continue to run.

[0076] When the temperature inside the battery pack is t1<25℃ and the temperature inside the battery compartment is t2≤t3-2℃ or t4≤18℃, the compressor and axial flow fan stop running, the second solenoid valve in the liquid cooling host and the fourth solenoid valve in the temperature control and dehumidification module are powered off and stop working, and the water pump and the fan in the temperature control and dehumidification module stop running after a delay of 30s;

[0077] Where: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room indoor temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value;

[0078] S5, battery pack cooling, battery compartment and control room dehumidification mode operation method is as follows:

[0079] When the temperature inside the battery pack t1>28℃, the humidity inside the battery compartment T≥T1+10%, and 0≤t2≤24℃, the four-way valve in the liquid cooling host will not be powered on and will operate in cooling mode to reduce the temperature inside the battery pack core;

[0080] When the temperature inside the battery pack t1>28℃, the humidity inside the battery compartment T≥T1+10%, and 0≤t2≤24℃, the four-way valve in the liquid-cooled host is not powered on and operates in cooling mode. The compressor, water pump, axial flow fan, etc. start working, and the refrigerant flows through the condenser and electronic expansion valve in the host to become a low-temperature liquid. The coolant temperature is reduced through the plate heat exchanger, thereby reducing the temperature inside the battery pack core;

[0081] At the same time, the first solenoid valve in the liquid cooling host and the third solenoid valve in the temperature control and dehumidification module work, while the second solenoid valve in the liquid cooling host and the fourth solenoid valve in the temperature control and dehumidification module do not work, that is, the high-temperature gas sent by the compressor in the liquid cooling host flows into the temperature control and dehumidification module through the first solenoid valve, enters the condenser in the temperature control and dehumidification module through the third solenoid valve, and then enters the evaporator through the electronic expansion valve. The evaporated refrigerant returns to the liquid cooling host pipeline. The fan in the temperature control and dehumidification module works according to the dehumidification mode (maximum air volume 70%), circulates the air in the battery compartment and the control room through the evaporator in the temperature control and dehumidification module, and reduces the humidity in the cabin;

[0082] When the temperature inside the battery pack t1 is less than 25°C and the temperature and humidity inside the battery compartment meet T≥T1+10% and t2 is less than 28°C, the water pump, axial flow fan and electronic expansion valve in the liquid cooling host stop running, the compressor keeps running, and the fan and electronic expansion valve in the thermostatic dehumidification module keep running;

[0083] When the temperature in the battery pack t1>28℃ and the temperature and humidity in the battery compartment meet T≤T1-10% or t2≥28℃, the first solenoid valve in the liquid cooling host and the third solenoid valve in the temperature control and dehumidification module are powered off and stop working, and then the fan in the temperature control and dehumidification module stops running after a delay of 30s, and the compressor, water pump and axial flow fan in the liquid cooling host continue to run;

[0084] When the temperature inside the battery pack t1 is less than 25°C and the temperature and humidity inside the battery compartment meet T≤T1-10% or t2≥28°C, the compressor and axial flow fan stop running, the first solenoid valve in the liquid cooling host and the third solenoid valve in the temperature control and dehumidification module are powered off and stop working, and the water pump and the fan in the temperature control and dehumidification module stop running after a delay of 30s;

[0085] Where: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room indoor temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value;

[0086] S6, battery compartment and control room humidification mode operation

[0087] When the temperature and humidity in the battery compartment meet ≤T1-10% and t2≥3℃, the temperature control and dehumidification module automatically turns on the humidification working mode. The humidification working mode can be operated together with the battery compartment (control room) heating mode, battery pack cooling mode and battery pack heating mode according to the collected temperature and humidity conditions. Among them: T1 represents the humidity setting value, and t2 represents the control room temperature value.

[0088] The control system of the energy storage and battery swap station temperature and humidity control method includes a water-cooled host module, a battery compartment and a control room. The water-cooled host module temperature and humidity control connects the battery compartment and the control room. The battery compartment and the control room are both provided with temperature and humidity control modules of the same structure. The battery compartment is also provided with a battery pack group. The battery compartment and the control room are provided with temperature and humidity sensors.

[0089] The main body of the water-cooled host module includes a water tank, a heat exchanger, a first evaporator, a PTC heater group, a compressor, a first solenoid valve, a host condenser, a host electronic expansion valve and a second solenoid valve. The water tank is connected to the first evaporator through a valve group, and the liquid outlet of the first evaporator is connected to the PTC heater group through a pipeline, and the PTC heater group is connected to the battery pack group inside the battery compartment through a pipeline, and the liquid outlet of the battery pack group is also connected to the water tank through a pipeline to form a closed loop;

[0090] The compressor is connected to the inlet of the four-way reversing valve, one of the other three outlets of the four-way reversing valve is connected to the host condenser through a pipeline, the outlet of the host condenser is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the host electronic expansion valve through a pipeline, the host electronic expansion valve is connected to the first evaporator through a pipeline, and the other interface of the first evaporator and the interface of the battery compartment and the control room are connected to the four-way reversing valve through a three-way pipeline, the middle outlet of the four-way reversing valve is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the compressor through a pipeline, the first solenoid valve and the second solenoid valve are connected to the battery compartment and the control room through a three-way pipeline, and the first solenoid valve is also connected to the host condenser and the outlet of the four-way reversing valve through a pipeline, and the second solenoid valve is connected to the outlet of the host condenser through a pipeline;

[0091] The temperature and humidity control module includes a second evaporator, a condenser, a PTC heater, a humidifier, a third solenoid valve, a fourth solenoid valve, an electronic expansion valve and a drying filter. The second evaporator is connected to the outlet of the four-way reversing valve of the water-cooled host module through a pipeline, and the second evaporator is connected to the electronic expansion valve. The electronic expansion valve is divided into two ways through a pipeline tee, one way is connected to the drying filter through a pipeline, the drying filter is connected to the condenser, the condenser is connected to the third solenoid valve, and the other way of the electronic expansion valve is connected to the fourth solenoid valve. The third solenoid valve and the fourth solenoid valve are connected in parallel and connected to the first solenoid valve and the second solenoid valve through a pipeline; the PTC heater, the humidifier and the second evaporator are installed and fixed together;

[0092] The battery pack group includes multiple groups of battery packs, and the inlet pipe of each group of battery packs is connected to a manual ball valve Q and an electric ball valve V, and the outlet pipe of the battery pack is provided with other manual ball valves;

[0093] The outlet of the host condenser is also connected to a frequency converter radiator, and an axial flow fan is also arranged on the outside of the host condenser, and the outlet of the frequency converter radiator is also connected to a drying filter through a pipeline.

[0094] An exhaust thermometer TK2, an exhaust pressure gauge PK1 and a detection valve 2 are provided on the pipeline between the four-way reversing valve and the first solenoid valve and the main engine condenser, and an intake pressure gauge PK2 and an intake thermometer TK2 are provided on the pipeline between the compressor and the heat exchanger.

[0095] The valve group includes a group of butterfly valves D1, check valves Z1, water pumps 1 and butterfly valves D1 and another group of butterfly valves D2, check valves Z2, water pumps 2 and butterfly valves D2 connected in sequence. The two ends of the valve group are respectively provided with a water pump outlet pressure gauge PL1 and a water pump inlet pressure gauge PL1.

[0096] A unit return liquid thermometer TL1 is also provided on the water inlet pipe of the water tank.

[0097] The liquid outlet pipe connected to the PTC heater group is provided with a manual ball valve Q54, a unit liquid outlet thermometer TL11, a Y-type filter, a manual liquid discharge ball valve Q52 and a butterfly valve D5.

[0098] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. It will be apparent to those skilled in the art that various modifications to these embodiments are possible, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown in the present application, but will conform to the widest scope consistent with the principles and novel features applied for by the present application.

Claims

1. A method for controlling temperature and humidity in an energy storage and battery swap station, characterized in that: The following methods are included: S1, battery pack and control room PTC heating mode operation method is as follows: When the temperature in any battery pack of the battery pack group meets t1<15℃ and t<-20℃, the water pump and PTC heater in the liquid-cooled host work and the heating function is turned on. When t1>20℃, the PTC in the host stops heating. After 30s of self-circulation, the host stops running. When the control room temperature t2<T-2℃ and t4<-20℃, the PTC heater and fan in the temperature control dehumidification module work to heat the control room air. When t2≥T+2℃, the PTC heater stops working and the fan stops working after 30s. Among them: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value; S2, battery pack and control room heating heat pump mode operation method is as follows: When the temperature in any battery pack of the battery pack group meets t1<15℃ and the ambient temperature t≥-20℃, and the temperature in the control room meets -20℃≤t4≤5℃ and t2<t3-2℃, the four-way reversing valve of the liquid-cooled host is powered on and starts working in heating mode. At the same time, the second solenoid valve in the liquid-cooled host and the fourth solenoid valve in the temperature-control dehumidification module work, and the first solenoid valve in the liquid-cooled host and the third solenoid valve in the temperature-control dehumidification module do not work. The air in the cabin exchanges heat with the high-temperature evaporator in the temperature-control dehumidification module to heat the air temperature in the cabin. When the temperature inside the battery pack t1>20℃, and the temperature inside the battery compartment t2<t3-2℃, the water pump and electronic expansion valve in the liquid cooling host will stop working after a delay of 30s, the compressor will continue to work, and the fan and electronic expansion valve in the temperature control and dehumidification module will continue to work; When the temperature inside the battery pack t1≤20℃, and the temperature inside the battery compartment t2≥t3+2℃, the second solenoid valve in the liquid cooling host and the fourth solenoid valve in the temperature control and dehumidification module are powered off and stop working, and then the fan in the temperature control and dehumidification module stops running after a delay of 30s, while the compressor, water pump, and axial flow fan in the liquid cooling host continue to run; When the temperature inside the battery pack t1>20℃, and the temperature inside the battery compartment t2≥t3+2℃, the compressor and axial fan in the liquid cooling host stop working, the water pump stops working after a delay of 30s, and the fan in the temperature control and dehumidification module stops working after a delay of 30s, and then the second solenoid valve and battery valve 4 are powered off and closed; Where: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room indoor temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value; S3, battery pack cooling, battery compartment and control room heating automatic mode operation method is as follows: When the temperature inside the battery pack is t1>28℃, the temperature inside the battery compartment is t≤5℃ and t2<t3-2℃, the four-way valve in the liquid cooling host is not powered on and operates in cooling mode, providing low-temperature coolant for the battery pack to reduce the temperature inside the battery pack core, the solenoid valves in the liquid cooling host and the temperature and humidity control module do not work, and the PTC heater in the temperature and humidity control module works to heat the air in the battery compartment; When the temperature inside the battery pack is less than 25°C, the battery pack exits the cooling mode, the compressor stops running, and the water pump and axial flow fan stop running after a delay of 30 seconds; When the temperature in the battery compartment is t2≥t3+2, the PTC heater in the temperature control and dehumidification module stops running, and the fan stops running after a delay of 30s; Where: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room indoor temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value; S4, battery pack cooling, battery compartment and control room cooling mode operation method is as follows: When the temperature inside the battery pack t1>28℃, the temperature inside the battery compartment t3+2℃≤t2 and t2≥24℃, that is, when the battery pack, battery compartment and control room all have cooling requirements, the four-way valve in the liquid cooling host is not powered on and operates in cooling mode to reduce the temperature inside the battery pack core; When the temperature inside the battery pack t1 is less than 25°C and the temperature inside the battery compartment is t3+2°C≤t2 and t2≥24°C, the water pump and electronic expansion valve in the liquid cooling host stop running, and the other components remain in operation; When the temperature inside the battery pack t1>28℃ and the temperature inside the battery compartment t2≤t3-2℃ or t4≤18℃, the second solenoid valve in the liquid cooling host and the fourth solenoid valve in the temperature control and dehumidification module are powered off and stop working, and then the fan in the temperature control and dehumidification module stops running after a delay of 30s, and the compressor, water pump and axial flow fan in the liquid cooling host continue to run; When the temperature inside the battery pack is t1<25℃ and the temperature inside the battery compartment is t2≤t3-2℃ or t4≤18℃, the compressor and axial flow fan stop running, the second solenoid valve in the liquid cooling host and the fourth solenoid valve in the temperature control and dehumidification module are powered off and stop working, and the water pump and the fan in the temperature control and dehumidification module stop running after a delay of 30s; Where: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room indoor temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value; S5, battery pack cooling, battery compartment and control room dehumidification mode operation method is as follows: When the temperature inside the battery pack t1>28℃, the humidity inside the battery compartment T≥T1+10%, and 0≤t2≤24℃, the four-way valve in the liquid cooling host will not be powered on and will operate in cooling mode to reduce the temperature inside the battery pack core; When the temperature inside the battery pack t1 is less than 25°C and the temperature and humidity inside the battery compartment meet T≥T1+10% and t2 is less than 28°C, the water pump, axial flow fan and electronic expansion valve in the liquid cooling host stop running, the compressor keeps running, and the fan and electronic expansion valve in the thermostatic dehumidification module keep running; When the temperature in the battery pack t1>28℃ and the temperature and humidity in the battery compartment meet T≤T1-10% or t2≥28℃, the first solenoid valve in the liquid cooling host and the third solenoid valve in the temperature control and dehumidification module are powered off and stop working, and then the fan in the temperature control and dehumidification module stops running after a delay of 30s, and the compressor, water pump and axial flow fan in the liquid cooling host continue to run; When the temperature inside the battery pack t1 is less than 25°C and the temperature and humidity inside the battery compartment meet T≤T1-10% or t2≥28°C, the compressor and axial flow fan stop running, the first solenoid valve in the liquid cooling host and the third solenoid valve in the temperature control and dehumidification module are powered off and stop working, and the water pump and the fan in the temperature control and dehumidification module stop running after a delay of 30s; Where: t represents the battery pack ambient temperature, t1 represents the battery cell temperature, t4 represents the outdoor ambient temperature of the control room, t2 represents the control room indoor temperature value, t3 represents the temperature setting value, T represents the humidity collection value and T1 represents the humidity setting value; S6, battery compartment and control room humidification mode operation method is as follows: When the temperature and humidity in the battery compartment meet ≤T1-10% and t2≥3℃, the temperature control and dehumidification module automatically turns on the humidification working mode, where: T1 represents the humidity setting value, and t2 represents the control room temperature value; The control system of the energy storage and battery swap station temperature and humidity control method includes a water-cooled host module, a battery compartment and a control room. The water-cooled host module temperature and humidity control connects the battery compartment and the control room. The battery compartment and the control room are both provided with temperature and humidity control modules of the same structure. The battery compartment is also provided with a battery pack group. The battery compartment and the control room are provided with temperature and humidity sensors. The main body of the water-cooled host module includes a water tank, a heat exchanger, a first evaporator, a PTC heater group, a compressor, a first solenoid valve, a host condenser, a host electronic expansion valve and a second solenoid valve. The water tank is connected to the first evaporator through a valve group, and the liquid outlet of the first evaporator is connected to the PTC heater group through a pipeline, and the PTC heater group is connected to the battery pack group inside the battery compartment through a pipeline, and the liquid outlet of the battery pack group is also connected to the water tank through a pipeline to form a closed loop; The compressor is connected to the inlet of the four-way reversing valve, one of the other three outlets of the four-way reversing valve is connected to the host condenser through a pipeline, the outlet of the host condenser is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the host electronic expansion valve through a pipeline, the host electronic expansion valve is connected to the first evaporator through a pipeline, and the other interface of the first evaporator and the interface of the battery compartment and the control room are connected to the four-way reversing valve through a three-way pipeline, the middle outlet of the four-way reversing valve is connected to the heat exchanger through a pipeline, the heat exchanger is connected to the compressor through a pipeline, the first solenoid valve and the second solenoid valve are connected to the battery compartment and the control room through a three-way pipeline, and the first solenoid valve is also connected to the host condenser and the outlet of the four-way reversing valve through a pipeline, and the second solenoid valve is connected to the outlet of the host condenser through a pipeline; The temperature and humidity control module includes a second evaporator, a condenser, a PTC heater, a humidifier, a third solenoid valve, a fourth solenoid valve, an electronic expansion valve and a drying filter. The second evaporator is connected to the outlet of the four-way reversing valve of the water-cooled host module through a pipeline, and the second evaporator is connected to the electronic expansion valve. The electronic expansion valve is divided into two ways through a pipeline tee, one way is connected to the drying filter through a pipeline, the drying filter is connected to the condenser, the condenser is connected to the third solenoid valve, and the other way of the electronic expansion valve is connected to the fourth solenoid valve. The third solenoid valve and the fourth solenoid valve are connected in parallel and connected to the first solenoid valve and the second solenoid valve through a pipeline; the PTC heater, the humidifier and the second evaporator are installed and fixed together; The battery pack group includes multiple groups of battery packs, and the inlet pipe of each group of battery packs is connected to a manual ball valve Q and an electric ball valve V, and the outlet pipe of the battery pack is provided with other manual ball valves.

2. A method for controlling temperature and humidity of an energy storage and battery swap station according to claim 1, characterized in that: The outlet of the host condenser is also connected to a frequency converter radiator, and an axial flow fan 1 is also provided on the outside of the host condenser, and the outlet of the frequency converter radiator is also connected to a drying filter through a pipeline.

3. A method for controlling temperature and humidity of an energy storage and battery swap station according to claim 1, characterized in that: An exhaust thermometer TK2, an exhaust pressure gauge PK1 and a detection valve 2 are provided on the pipeline between the four-way reversing valve and the first solenoid valve and the main engine condenser, and an intake pressure gauge PK2 and an intake thermometer TK2 are provided on the pipeline between the compressor and the heat exchanger.

4. A method for controlling temperature and humidity of an energy storage and battery swap station according to claim 1, characterized in that: The valve group includes a group of butterfly valves D1, check valves Z1, water pumps 1 and butterfly valves D1 and another group of butterfly valves D2, check valves Z2, water pumps 2 and butterfly valves D2 connected in sequence. The two ends of the valve group are respectively provided with a water pump outlet pressure gauge PL1 and a water pump inlet pressure gauge PL1.

5. A method for controlling temperature and humidity in an energy storage and battery swap station according to claim 1, characterized in that: A unit return liquid thermometer TL1 is also provided on the water inlet pipe of the water tank.

6. A method for controlling temperature and humidity in an energy storage and battery swap station according to claim 1, characterized in that: The liquid outlet pipe connected to the PTC heater group is provided with a manual ball valve Q54, a unit liquid outlet thermometer TL11, a Y-type filter, a manual liquid discharge ball valve Q52 and a butterfly valve D5.

Images