Energy storage and temperature control system capable of controlling temperature and humidity and control mode of energy storage and temperature control system

Abstract

According to the system, a temperature and humidity control unit is composed of a compressor, an air cooling heat exchanger, a flow device, a liquid cooling heat exchanger, a water pump, a heating device and a dehumidification heat exchanger, the compressor has the function of an air pump, when the temperature control system works, a battery PACK can be cooled through a main machine, and the temperature and humidity of the battery PACK can be controlled through a dehumidification heat exchanger. And the dehumidification heat exchanger can be utilized to realize moderate control of the energy storage container. The energy storage battery has multiple use modes including the refrigeration mode, the air pump mode, the dehumidification mode, the heating mode and the refrigeration and dehumidification mode, when the energy storage battery is used, the different modes can be started to control the temperature and humidity of the energy storage battery according to the environment temperature and humidity, refrigeration, air pump, heating and dehumidification are integrated, and the energy storage battery is more convenient to use. Temperature control and humidity control of an electrochemical energy storage system are well achieved, and electrochemical energy storage, energy conservation, safety and reliability are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage temperature control, and particularly relates to an energy storage temperature control system for controlling temperature and humidity and its control method. Background Art

[0002] Since the output of renewable energy sources such as photovoltaic and wind power varies greatly with seasons and weather conditions, the introduction of energy storage technology can improve the problem of mismatch between the output of wind power and photovoltaic and the electricity load. Energy storage technologies include pumped storage, compressed air, electrochemical energy storage, and hydrogen energy storage, etc. Among them, pumped storage and compressed air require suitable sites, while hydrogen energy storage is currently in the research stage, and electrochemical energy storage has entered the industry's vision and gradually become an important energy storage technology.

[0003] Due to the strict requirements of lithium batteries for operating temperature, the electrochemical energy storage temperature control system can play an important role. The traditional liquid-cooled energy storage temperature control system only supports temperature control and cannot achieve humidity control.

[0004] Therefore, how to provide an energy storage temperature control system for controlling temperature and humidity and its control method to solve the problems existing in the prior art is of great significance for its application. Summary of the Invention

[0006] In view of this, the purpose of this application is to provide an energy storage temperature control system for controlling temperature and humidity and its control method to solve the problems.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] An energy storage temperature control system for controlling temperature and humidity and its control method, including a coolant circulation loop, a refrigerant circulation loop, and a liquid-cooled heat exchanger. The liquid-cooled heat exchanger includes a refrigerant channel and a coolant channel;

[0009] The coolant circulation loop is connected to the coolant channel of the liquid-cooled heat exchanger, and the refrigerant circulation loop is connected to the refrigerant channel of the liquid-cooled heat exchanger;

[0010] The coolant circulation loop includes a water pump, a heating device, and a battery PACK;

[0011] The refrigerant circulation loop includes a compressor, an air-cooled heat exchanger, a flow device, and a dehumidifying heat exchanger;

[0012] The exhaust port of the compressor is connected to the inlet of the air-cooled heat exchanger. The flow device has two flow devices, namely flow device 3A and flow device 3B. The outlet of the air-cooled heat exchanger and the outlet of flow device 3B are both connected to the inlet of flow device 3A. The outlet of flow device 3A is connected to the inlet of the refrigerant channel of the liquid-cooled heat exchanger;

[0013] The inlet of the dehumidifying heat exchanger and the inlet of the compressor are both connected to the outlet of the refrigerant channel of the liquid-cooled heat exchanger, and the inlet of the flow device 3B is connected to the outlet of the dehumidifying heat exchanger;

[0014] Preferably, the outlet of the coolant channel of the liquid-cooled heat exchanger is connected to the inlet of the heating device, the outlet of the water pump is connected to the inlet of the coolant channel of the liquid-cooled heat exchanger, and the inlet of the water pump is connected to the battery PACK.

[0015] Preferably, the flow device has a wide-range flow regulation function, and the compressor has an air pump function.

[0016] Preferably, there are two or more battery PACKs, and they are connected in parallel.

[0017] A temperature and humidity control energy storage temperature control system and its control method include the following steps:

[0018] 1): Detect the outdoor temperature and humidity;

[0019] 2): Select different modes of the temperature control system according to the outdoor temperature and humidity.

[0020] Preferably, the temperature control system includes the following five modes: refrigeration mode, air pump mode, dehumidification mode, heating mode, refrigeration + dehumidification mode.

[0021] Preferably, the mode selection criteria are as follows:

[0022] Ⅰ. When the outdoor temperature is higher than 25°C and the humidity is normal, select the refrigeration mode;

[0023] Ⅱ. When the outdoor temperature is lower than 25°C and the humidity is normal, select the air pump mode;

[0024] Ⅲ. When the outdoor temperature is 15°C to 25°C and the humidity is high, select the dehumidification mode;

[0025] Ⅳ. When the outdoor temperature is between -30°C and 14°C and the humidity is normal, select the heating mode;

[0026] Ⅴ. When the outdoor temperature is higher than 25°C and the humidity is high, select the refrigeration + dehumidification mode.

[0027] Preferably, in the refrigeration mode: the compressor is turned on, the water pump is turned on, the flow device 3A is turned on, and the flow device 3B is turned off;

[0028] In the air pump mode: the compressor is used as an air pump, the compressor is turned on, the water pump is turned on, the flow device 3A is turned on, and the flow device 3B is turned off;

[0029] Heating mode: The compressor is not turned on, the water pump 6 is turned on, the heating device 5 is turned on, the flow device 3A is turned off, and the flow device 3B is turned off;

[0030] Dehumidification mode: The compressor is turned on, the water pump is turned off, the flow device 3A is turned off, and the flow device 3B is turned on;

[0031] Refrigeration + dehumidification mode: The compressor is turned on, the water pump 6 is turned on, the flow device 3A is turned on, and the flow device 3B is turned on.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] The present invention has multiple usage modes, including refrigeration mode, air pump mode, dehumidification mode, heating mode, and refrigeration + dehumidification mode. During use, different modes can be turned on according to the ambient temperature and humidity to control the temperature and humidity of the energy storage battery. It integrates refrigeration, air pump, heating, and dehumidification, and can well solve the temperature control and humidity control of the electrochemical energy storage system, realizing energy saving, safety, and reliability of the electrochemical energy storage.

[0034] The above description is only an overview of the technical solution of the present application. In order to understand the technical means of the present application more clearly, so as to be implemented in accordance with the content of the specification, and in order to make the above and other purposes, features, and advantages of the present application more obvious and understandable, the following is a detailed description of the preferred embodiments of the present application in conjunction with the drawings as follows.

[0035] Based on the following detailed description of the specific embodiments of the present application in conjunction with the drawings, those skilled in the art will understand the above and other purposes, advantages, and features of the present application more clearly. Brief Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0037] Figure 1 It is a schematic diagram of Embodiment 1;

[0038] Figure 2 It is a schematic diagram of Embodiment 1 when the refrigeration mode is turned on;

[0039] Figure 3 It is a schematic diagram of Embodiment 1 when the air pump mode is turned on;

[0040] Figure 4 Schematic diagram of Example 1 when the dehumidification mode is turned on;

[0041] Figure 5 Schematic diagram of Example 1 when the heating mode is turned on;

[0042] Figure 6 Schematic diagram of Example 1 when the cooling + dehumidification mode is turned on

[0043] Figure 7 Schematic diagram of Example 2 of the present invention.

[0044] Figure 8 Schematic diagram of Example 3;

[0045] Figure 9 Schematic diagram of Example 3 when the cooling mode is turned on;

[0046] Figure 10 Schematic diagram of Example 3 when the air pump mode is turned on;

[0047] Figure 11 Schematic diagram of Example 3 when the dehumidification mode is turned on;

[0048] Figure 12 Schematic diagram of Example 3 when the heating mode is turned on;

[0049] Figure 13 Schematic diagram of Example 3 when in the cooling + dehumidification mode.

[0050] In the figure: 1. Compressor; 2. Air-cooled heat exchanger; 3. Flow device; 4. Liquid-cooled heat exchanger; 5. Heating device; 6. Water pump; 7. Dehumidification heat exchanger; 8. Dehumidification solenoid valve; 9. Capillary tube. Detailed implementation manners

[0051] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. In the following description, specific details such as specific configurations and components are provided only to assist in a comprehensive understanding of the embodiments of the present application. Therefore, those skilled in the art should clearly understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Additionally, descriptions of known functions and structures are omitted in the embodiments for clarity and conciseness.

[0052] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or arrangements discussed.

[0053] In this text, the term "and / or" is merely a description of the associated relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, B exists alone, and both A and B exist simultaneously. In this text, the term " / and" is a description of another associated object relationship, indicating that there can be two relationships. For example, A / and B can represent: A exists alone, and both A and B exist alone. Additionally, in this text, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0054] It should also be noted that in this text, 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. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion.

[0055] Please refer to Figures 1-13 , the present invention provides a technical solution for a temperature and humidity control energy storage temperature control system and its control method:

[0056] Embodiment 1:

[0057] A temperature and humidity control energy storage temperature control system and its control method include a coolant circulation loop, a refrigerant circulation loop, and a liquid-cooled heat exchanger 4. The liquid-cooled heat exchanger 4 includes a refrigerant channel and a coolant channel;

[0058] The coolant circulation loop is connected to the coolant channel of the liquid-cooled heat exchanger 4, and the refrigerant circulation loop is connected to the refrigerant channel of the liquid-cooled heat exchanger 4;

[0059] The coolant circulation loop includes a water pump 6, a heating device 5, and a battery PACK;

[0060] The refrigerant circulation loop includes a compressor 1, an air-cooled heat exchanger 2, a flow device 3, and a dehumidification heat exchanger 7;

[0061] The exhaust port of the compressor 1 is connected to the inlet of the air-cooled heat exchanger 2. The flow device 3 has two parts, namely the flow device 3A and the flow device 3B. The outlet of the air-cooled heat exchanger 2 and the outlet of the flow device 3B are both connected to the inlet of the flow device 3A, and the outlet of the flow device 3A is connected to the inlet of the refrigerant channel of the liquid-cooled heat exchanger 4; the inlet of the dehumidifying heat exchanger 7 and the intake port of the compressor 1 are both connected to the outlet of the refrigerant channel of the liquid-cooled heat exchanger 4, and the inlet of the flow device 3B is connected to the outlet of the dehumidifying heat exchanger 7; the outlet of the coolant channel of the liquid-cooled heat exchanger 4 is connected to the inlet of the heating device 5, the outlet of the water pump 6 is connected to the inlet of the coolant channel of the liquid-cooled heat exchanger 4, and the inlet of the water pump 6 is connected to the battery PACK. The flow device 3 has the function of widely adjusting the flow rate, and the compressor 1 has the function of an air pump. There are two or more battery PACKs, and they are arranged in parallel.

[0062] Embodiment 2

[0063] Refer to Figure 7 , different from Embodiment 1, a dehumidifying solenoid valve 8 is additionally provided, and the original flow device 3B is replaced with a capillary tube 9. The inlet of the dehumidifying solenoid valve 8 is connected to the capillary tube 9, and the outlet of the dehumidifying solenoid valve 8 is connected to the flow device 3A, and dehumidification is achieved through the dehumidifying solenoid valve 8 and the capillary tube 9.

[0064] The present invention can operate in different working modes:

[0065] (1) Refrigeration mode

[0066] As Figure 2 shown, when the electrochemical energy storage is charging or discharging, the system will generate a large amount of heat, and the battery can generally work safely, stably and efficiently in an environment of 15 - 35 °C (suitable humidity). When the outdoor temperature is higher than 25 °C, it operates in the refrigeration mode. The compressor 1 is turned on, the water pump 6 is turned on, the heating device 5 is turned off, the flow device 3A is turned on, and the flow device 3B is turned off. The water pump 6 delivers the coolant into the cooling channel of the battery PACK, absorbs the heat generated by the battery and transfers it to the coolant. The temperature of the coolant itself rises and returns to the coolant channel of the liquid-cooled heat exchanger 4. At this time, under the action of compression and condensation heat dissipation by the compressor 1, the relatively high-temperature coolant is cooled through the heat exchange of the liquid-cooled heat exchanger 4 and is again delivered to the cooling channel of the battery PACK by the action of the water pump 6 for refrigeration, and so on to dissipate heat for the battery;

[0067] (2) Air pump mode

[0068] As Figure 3As shown in the figure, when the outdoor temperature is lower than 25°C, the electro-chemical energy storage is in the transitional season or the low-temperature season in winter, and when charging and discharging are required at this time, a large amount of heat will be generated by the system. To maintain the battery in an environment of 15 - 35°C (suitable humidity), the system operates in the air pump mode. The compressor 1 is used as an air pump, the water pump 6 is turned on, the heating device 5 is turned off, the flow device 3A is turned on, and the flow device 3B is turned off. The water pump 6 delivers the coolant into the cooling channels of the battery PACK, absorbs the heat generated by the battery and transfers it to the coolant. The temperature of the coolant itself rises, and it returns to the coolant channel of the liquid-cooled heat exchanger 4. At this time, the compressor 1 (air pump) is appropriately pressurized to overcome the resistance, dissipates heat by relying on the low outdoor temperature in the air-cooled heat exchanger 2, and under the action of the flow device 3, cools the coolant with a higher temperature through the heat exchange of the liquid-cooled heat exchanger 4, and is then delivered to the cooling channels of the battery PACK again for refrigeration under the action of the water pump 6, and circulates in this way to dissipate heat for the battery;

[0069] (3) Dehumidification mode

[0070] As Figure 4 shown in the figure, when the temperature is between -30°C and 50°C, since the outdoor humidity is relatively high at this time, when the humidity inside the electro-chemical energy storage container needs to be controlled, especially when it is raining or the humidity is high outside, the compressor 1 works at this time. The compressor 1 is turned on, the flow device 3B is turned on. At this time, under the action of compression and the air-cooled heat exchanger 2, the water pump 6 is turned on, and the container is dehumidified through the dehumidification heat exchanger 7;

[0071] (4) Heating mode

[0072] As Figure 5 shown in the figure, when the electro-chemical energy storage is in the low-temperature season in winter and is not working in the charging and discharging mode but only in the standby state, to maintain the battery in an environment of 15 - 35°C (suitable humidity), the system operates in the heating mode. At this time, the compressor 1 is turned off, while the heating device 5 starts to work, and at the same time the water pump 6 also works. The flow device 3A is turned off, and the flow device 3B is turned off. The coolant with a higher temperature is delivered into the cooling channels of the battery PACK through the water pump 6 for heating. The cooled coolant is further heated and raised in temperature under the heating device 5, and then delivered to the cooling channels of the battery PACK again for heating, and circulates in this way to heat the battery;

[0073] (5) Refrigeration + dehumidification mode

[0074] As Figure 6As shown, when the electrochemical energy storage is in the charging and discharging operation and the outdoor humidity is very high, cooling and dehumidification are required at the same time. To maintain the battery in an environment of 15 - 35°C (appropriate humidity), the system operates in the cooling + dehumidification mode. At this time, the compressor is turned on, the heating device is turned off, the water pump works, the flow device 3A is opened, the flow device 3B is opened, and the water pump conveys the coolant into the cooling channel of the battery PACK, absorbs the heat generated by the battery and transfers it to the coolant. The temperature of the coolant itself rises, and it returns to the coolant channel of the liquid-cooled heat exchanger 4. At this time, the compressor 1 compresses, condenses and dissipates heat in the air-cooled heat exchanger 2, cools the relatively high-temperature coolant through the heat exchange of the liquid-cooled heat exchanger 4, and is conveyed to the cooling channel of the battery PACK again under the action of the water pump 6 for refrigeration, and circulates like this to dissipate heat for the battery. At the same time, the container interior is dehumidified through the dehumidification heat exchanger.

[0075] During specific use:

[0076] ① When the electrochemical energy storage is in full working conditions outdoors, such as -30°C to 50°C, a large amount of heat is generated by the battery during charging and discharging, so cooling is required. The battery generally needs to work safely, stably and efficiently in an environment of 15 - 35°C (appropriate humidity). When the outdoor temperature is higher than 25°C, the compressor 1 is turned on, the water pump 6 is opened, the flow device 3A is opened, and the flow device 3B is closed. To maintain an appropriate temperature, the water pump 6 conveys the coolant at a temperature of 12 - 16°C into the cooling channel of the battery PACK, absorbs the heat generated by the battery, and the temperature of the coolant itself rises, such as 15 - 20°C. The coolant returns to the coolant channel of the liquid-cooled heat exchanger 4. At this time, the compressor 1 compresses, condenses and dissipates heat and under the action of the throttling device, cools the relatively high-temperature coolant of 15 - 20°C through the heat exchange of the liquid-cooled heat exchanger 4 to 12 - 16°C, and is conveyed to the cooling channel of the battery PACK again under the action of the water pump 6 for refrigeration, and circulates like this to dissipate heat for the battery;

[0077] ② When the outdoor temperature is lower than 25°C, the compressor 1 is used as an air pump at this time, the water pump 6 is opened, the flow device 3A is opened, and the flow device 3B is closed. To maintain an appropriate temperature, at this time the compressor 1 (air pump) is appropriately pressurized to overcome the resistance, dissipates heat by relying on the outdoor low temperature in the air-cooled heat exchanger 2, and under the action of the flow device, cools the relatively high-temperature coolant of 15 - 20°C through the heat exchange of the liquid-cooled heat exchanger 4 to 12 - 16°C. The water pump 6 conveys the coolant at a temperature of 12 - 16°C into the cooling channel of the battery PACK, absorbs the heat generated by the battery, and the temperature of the coolant itself rises by 15 - 20°C. The coolant returns to the coolant channel of the liquid-cooled heat exchanger 4, and is conveyed to the cooling channel of the battery PACK again under the action of the water pump 6 for refrigeration, and circulates like this to dissipate heat for the battery;

[0078] ③When the electrochemical energy storage is under outdoor low-temperature conditions, such as -30°C to 14°C, since the energy storage battery is not constantly in the charging and discharging process, and the heat preservation effect of the container is not significant, the outdoor low temperature will affect the battery performance, resulting in battery performance degradation. Therefore, heating is required at this time. The water pump 6 is turned on, and the low-temperature coolant, generally <15°C, is transported to the liquid-cooling channel of the liquid-cooling heat exchanger 4 through the action of the water pump 6. Since the compressor 1 is not turned on, the flow device 3A is closed, and the flow device 3B is closed. It only flows through the channel and then enters the heating device 5. The heating device 5 heats the low-temperature coolant, generally heating it to 15 - 20°C, and then enters the channel of the battery PACK again to maintain the battery pack temperature within a suitable temperature range;

[0079] ④When the electrochemical energy storage is under outdoor full working conditions, such as -30°C to 50°C, since the outdoor humidity is relatively high at this time, and the container sealing is not perfect, and the liquid-cooling device does not have a dehumidification function, the dehumidification heat exchanger 7 needs to be opened at this time, and the compressor 1 is turned on. The flow device 3B is opened, so that the low-temperature dehumidification heat exchanger 7 realizes dehumidification. Under the working condition of the evaporation temperature (5 - 12°C) of the dehumidification heat exchanger 7, the humidity inside the container is controlled;

[0080] ⑤When the electrochemical energy storage is under outdoor high-temperature conditions, and at the same time the outdoor humidity is high, and the container sealing is not perfect, and the liquid-cooling device does not have a dehumidification function, the dehumidification heat exchanger 7 needs to be opened at this time, and the compressor 1 is turned on. The flow device 3B is opened, and the flow device 3A is opened, so that the low-temperature dehumidification heat exchanger 7 realizes dehumidification. Under the working condition of the evaporation temperature (5 - 12°C) of the dehumidification heat exchanger 7, the humidity inside the container is controlled.

[0081] Embodiment Three

[0082] It includes a coolant circulation loop, a refrigerant circulation loop, and a liquid-side heat exchanger 4. The liquid-side heat exchanger 4 includes a refrigerant channel and a coolant channel;

[0083] The coolant circulation loop is connected to the coolant channel of the liquid-side heat exchanger 4, and the refrigerant circulation loop is connected to the refrigerant channel of the liquid-side heat exchanger 4;

[0084] The coolant circulation loop includes a water pump 6, a heating device 5, and a battery PACK;

[0085] The refrigerant circulation loop includes a compressor 1, an air-cooled heat exchanger 2, a flow device 3, and a dehumidification heat exchanger 7;

[0086] Among them, there are two flow devices 3, namely flow device 3A and flow device 3B. The exhaust port of the compressor 1 is connected to the inlet of the air-cooled heat exchanger 2. The outlet of the air-cooled heat exchanger 2 is connected to the inlet of the flow device 3A. The outlet of the flow device 3A is connected to the inlet of the refrigerant channel of the liquid-side heat exchanger 4. The outlet of the refrigerant channel of the liquid-side heat exchanger 4 is connected to the inlet of the flow device 3B. The outlet of the flow device 3B is connected to the inlet of the dehumidifying heat exchanger 7. The outlet of the dehumidifying heat exchanger 7 is connected to the suction port of the compressor 1. The outlet of the coolant channel of the liquid-side heat exchanger 4 is connected to the inlet of the heating device 5. The outlet of the water pump 6 is connected to the inlet of the coolant channel of the liquid-side heat exchanger 4. The inlet of the water pump 6 is connected to the battery PACK. The flow device 3 has the function of widely adjusting the flow rate. The compressor 1 has the function of an air pump. There are more than 2 battery PACKs, and they are arranged in parallel.

[0087] As Figure 9 shown, refrigeration mode: When the electrochemical energy storage is in the process of charging or discharging, the system will generate a large amount of heat. Generally, the battery can work safely, stably and efficiently in an environment of 15 - 35 °C (suitable humidity). When the outdoor temperature is relatively high, when operating in the refrigeration mode, the compressor 1 is turned on, the water pump 6 is turned on, the heating device 5 is turned off, the flow device 3A is appropriately opened, the flow device 3B is fully opened. The water pump 6 transports the coolant into the cooling channel of the battery PACK, absorbs the heat generated by the battery and transfers it to the coolant. The temperature of the coolant itself rises and returns to the coolant channel of the liquid-side heat exchanger 4. At this time, after the compressor 6 compresses and condenses and dissipates heat through the air-cooled heat exchanger 2, the relatively high-temperature coolant is cooled through the heat exchange of the liquid-side heat exchanger 4, and is transported to the cooling channel of the battery PACK again under the action of the water pump 6 for refrigeration, and so on to dissipate heat for the battery.

[0088] As Figure 10 shown, air pump mode: When the electrochemical energy storage is in the transitional season or the low-temperature season in winter, and at this time charging and discharging are required, the system will generate a large amount of heat. To maintain the battery in an environment of 15 - 35 °C (suitable humidity), the system operates in the air pump mode. The compressor 1 is used as an air pump, the water pump 6 is turned on, the heating device 5 is turned off, the flow device 3A is appropriately opened, the flow device 3B is fully opened. The water pump 6 transports the coolant into the cooling channel of the battery PACK, absorbs the heat generated by the battery and transfers it to the coolant. The temperature of the coolant itself rises and returns to the coolant channel of the liquid-side heat exchanger 4. At this time, the compressor 1 (air pump) is appropriately pressurized and overcomes the resistance, dissipates heat by relying on the low outdoor temperature in the air-cooled heat exchanger 2, and under the action of the flow device 3, the relatively high-temperature coolant is cooled through the heat exchange of the liquid-side heat exchanger 4, and is transported to the cooling channel of the battery PACK again under the action of the water pump 6 for refrigeration, and so on to dissipate heat for the battery.

[0089] As Figure 11As shown, dehumidification mode: When the humidity inside the electro-chemical energy storage container needs to be controlled, especially when it is raining or the humidity is high outside, the compressor 1 works at this time. The compressor 1 is turned on, and the flow device 3A is appropriately opened or fully opened according to the demand, and the flow device 3B is appropriately opened. At this time, after the compressor 1 compresses and is cooled and dissipated heat by the air-cooled heat exchanger 2, the water pump 6 is turned on, and dehumidification is carried out for the inside of the container through the dehumidification heat exchanger 7.

[0090] As Figure 12 shown, heating mode: When the electro-chemical energy storage is in the low-temperature season in winter and is not working in the charge and discharge mode at this time, but only in the standby state, in order to maintain the battery in an environment of 15 - 35°C (suitable humidity), the system runs in the heating mode. At this time, the compressor 1 is turned off, the flow device 3A is turned off, the flow device 3B is turned off, and the heating device 5 starts to work. At the same time, the water pump 6 also works, and the coolant with a higher temperature is transported through the water pump 6 into the cooling channel of the battery PACK for heating. The cooled coolant is further heated and raised in temperature under the heating device 5, and then transported again into the cooling channel of the battery PACK for heating, and so on to heat the battery.

[0091] As Figure 13 shown, refrigeration + dehumidification mode: The electro-chemical energy storage is in the charge and discharge operation, and at the same time the outdoor humidity is very high. At this time, refrigeration and dehumidification are required. In order to maintain the battery in an environment of 15 - 35°C (suitable humidity), the system runs in the refrigeration + dehumidification mode. At this time, the compressor 1 is turned on, and the heating device 5 is turned off. The water pump 6 works, the flow device 3A is appropriately opened, the flow device 3B is appropriately opened. The water pump 6 transports the coolant into the cooling channel of the battery PACK, absorbs the heat generated by the battery and transfers it to the coolant. The temperature of the coolant itself rises, and it returns to the coolant channel of the liquid-side heat exchanger 4. At this time, after the compressor 1 compresses and is cooled and dissipated heat by the air-cooled heat exchanger 2, the coolant with a higher temperature is cooled through the heat exchange of the liquid-side heat exchanger 4, and is transported again into the cooling channel of the battery PACK for refrigeration under the action of the water pump 6, and so on to dissipate heat for the battery. At the same time, dehumidification is carried out for the inside of the container through the dehumidification heat exchanger 7.

[0092] During specific use:

[0093] ①When the electrochemical energy storage is under all outdoor working conditions, such as -30°C to 50°C, since charging and discharging are required, a large amount of heat will be generated by the battery at this time, so cooling is needed. The battery can generally work safely, stably and efficiently in an environment of 15 to 35°C (appropriate humidity). When the outdoor temperature is higher than 25°C, the compressor 1 is turned on at this time, the water pump 6 is opened, the flow device 3A is opened appropriately, and the flow device 3B is fully opened. To maintain a suitable temperature, the water pump 6 delivers the coolant at a temperature of 12 to 16°C into the cooling channel of the battery PACK, absorbs the heat generated by the battery, and the temperature of the coolant itself rises, such as 15 to 20°C. The coolant returns to the coolant channel of the liquid-cooled heat exchanger 4. At this time, under the action of compression by the compressor 1 and condensation and heat dissipation by the air-cooled heat exchanger 2, the coolant at a higher temperature of 15 to 20°C is cooled through the heat exchange of the liquid-cooled heat exchanger 4 to 12 to 16°C, and is transported to the cooling channel of the battery PACK again under the action of the water pump 1 for refrigeration. Such a cycle dissipates heat for the battery;

[0094] ②When the outdoor temperature is lower than 25°C, the compressor 1 is used as an air pump at this time, the water pump 6 is opened, the flow device 3A is opened appropriately, and the flow device 3B is fully opened. To maintain a suitable temperature, at this time, the compressor 1 (air pump) is appropriately pressurized to overcome the resistance, dissipates heat by relying on the outdoor low temperature in the air-cooled heat exchanger 2, and under the action of the flow device 3, the coolant at a higher temperature of 15 to 20°C is cooled through the heat exchange of the liquid-cooled heat exchanger 4 to 12 to 16°C. The water pump delivers the coolant at a temperature of 12 to 16°C into the cooling channel of the battery PACK, absorbs the heat generated by the battery, and the temperature of the coolant itself rises by 15 to 20°C. The coolant returns to the coolant channel of the liquid-cooled heat exchanger 4 and is transported to the cooling channel of the battery PACK again under the action of the water pump 6 for refrigeration. Such a cycle dissipates heat for the battery.

[0095] ③When the electrochemical energy storage is under outdoor low temperature conditions, such as -30°C to 14°C, since the energy storage battery is not charging and discharging all the time, and the heat preservation effect of the container is not significant, the outdoor low temperature will affect the battery performance and cause the battery performance to decay. Therefore, heating is needed at this time. The water pump 6 is turned on, the flow device 3A is closed, and the flow device 3B is closed. The low-temperature coolant, generally <15°C, is transported to the liquid-cooled channel of the liquid-cooled heat exchanger 4 through the action of the water pump. Since the main engine is not turned on, it only flows through the channel and then enters the heating device 5. The heating device 5 heats the low-temperature coolant, generally heating it to 15 to 20°C, and then enters the channel of the battery PACK again to keep the temperature of the battery pack within a suitable temperature range.

[0096] ④When the electrochemical energy storage is under full outdoor working conditions, such as -30°C to 50°C, since the outdoor humidity is relatively high at this time, and the container's sealing is not perfect, and the liquid cooling device does not have a dehumidification function, it is necessary to turn on the dehumidification heat exchanger 7 and turn on the compressor 1 at this time. The flow device 3A is appropriately opened or fully opened according to requirements, and the flow device 3B is appropriately opened, so that the low-temperature dehumidification heat exchanger 7 can achieve dehumidification. When the dehumidification heat exchanger 7 operates at an evaporation temperature of (5 - 12°C), the humidity inside the container is controlled.

[0097] ⑤When the electrochemical energy storage is under high outdoor temperature conditions and at the same time the outdoor humidity is high, and the container's sealing is not perfect, and the liquid cooling device does not have a dehumidification function, it is necessary to turn on the dehumidification heat exchanger 7 and turn on the compressor 1 at this time. The flow device 3B is appropriately opened, and the flow device 3A is appropriately opened, so that the low-temperature dehumidification heat exchanger 7 can achieve dehumidification. When the dehumidification heat exchanger 7 operates at an evaporation temperature of (5 - 12°C), the humidity inside the container is controlled.

[0098] The above are only the preferred embodiments of the present invention, and it does not limit the protection scope of the present invention accordingly. For those skilled in the art, various changes and modifications can be made to the present invention. Any changes, modifications, substitutions, integrations, and parameter changes made to these embodiments within the spirit and principle of the present invention by means of conventional substitutions or capable of achieving the same functions without departing from the principle and spirit of the present invention fall within the protection scope of the present invention.

Claims

1. A temperature and humidity controlled energy storage temperature control system and its control method, characterized in that: The system includes a coolant circulation loop, a refrigerant circulation loop, and a liquid-cooled heat exchanger (4). The liquid-cooled heat exchanger (4) includes a refrigerant channel and a coolant channel; The coolant circulation loop is connected to the coolant channel of the liquid-cooled heat exchanger (4), and the refrigerant circulation loop is connected to the refrigerant channel of the liquid-cooled heat exchanger (4); The coolant circulation loop includes a water pump (6), a heating device (5), and a battery PACK; The refrigerant circulation loop includes a compressor (1), an air-cooled heat exchanger (2), a flow device (3), and a dehumidifying heat exchanger (7); The exhaust port of the compressor (1) is connected to the inlet of the air-cooled heat exchanger (2). There are two flow devices (3), namely a flow device (3A) and a flow device (3B). The outlet of the air-cooled heat exchanger (2) and the outlet of the flow device (3B) are both connected to the inlet of the flow device (3A), and the outlet of the flow device (3A) is connected to the inlet of the refrigerant channel of the liquid-cooled heat exchanger (4); The inlet of the dehumidifying heat exchanger (7) and the inlet of the compressor (1) are both connected to the outlet of the refrigerant channel of the liquid-cooled heat exchanger (4), and the inlet of the flow device (3B) is connected to the outlet of the dehumidifying heat exchanger (7).

2. The temperature and humidity controlled energy storage temperature control system and its control method according to claim 1, characterized in that: The outlet of the coolant channel of the liquid-cooled heat exchanger (4) is connected to the inlet of the heating device (5), the outlet of the water pump (6) is connected to the inlet of the coolant channel of the liquid-cooled heat exchanger (4), and the inlet of the water pump (6) is connected to the battery PACK.

3. The temperature and humidity controlled energy storage temperature control system and its control method according to claim 2, characterized in that: The flow device (3) has a function of widely adjusting the flow rate, and the compressor (1) has an air pump function.

4. The temperature and humidity controlled energy storage temperature control system and its control method according to claim 3, characterized in that: There are two or more battery PACKs, and they are connected in parallel.

5. The temperature and humidity controlled energy storage temperature control system and its control method according to claim 4, characterized in that: Its control method includes the following steps: 1): Detect the outdoor temperature and humidity; 2): Select the mode of the temperature control system according to the outdoor temperature and humidity.

6. The temperature and humidity controlled energy storage temperature control system and its control method according to claim 5, characterized in that: The temperature control system includes the following five modes: refrigeration mode, air pump mode, dehumidification mode, heating mode, and refrigeration + dehumidification mode.

7. The temperature and humidity controlled energy storage temperature control system and its control method according to claim 4, characterized in that: The mode selection criteria are as follows Ⅰ. When the outdoor temperature is higher than 25°C and the humidity is normal, select the refrigeration mode; Ⅱ. When the outdoor temperature is lower than 25°C and the humidity is normal, select the air pump mode; Ⅲ. When the outdoor temperature is 15°C to 25°C and the humidity is high, select the dehumidification mode; Ⅳ. When the outdoor temperature is -30°C to 14°C and the humidity is normal, select the heating mode; Ⅴ. When the outdoor temperature is higher than 25°C and the humidity is high, select the refrigeration + dehumidification mode.

8. The temperature and humidity control energy storage temperature control system and its control method according to claim 7, characterized in that: Refrigeration mode: The compressor (1) is turned on, the water pump (6) is turned on, the flow device (3A) is turned on, and the flow device (3B) is turned off; Air pump mode: The compressor (1) is used as an air pump, the compressor (1) is turned on, the water pump (6) is turned on, the flow device (3A) is turned on, and the flow device (3B) is turned off; Heating mode: The compressor (1) is not turned on, the water pump (6) is turned on, the heating device (5) is turned on, the flow device (3A) is turned off, and the flow device (3B) is turned off; Dehumidification mode: The compressor (1) is turned on, the water pump (6) is turned off, the flow device (3A) is turned off, and the flow device (3B) is turned on; Refrigeration + dehumidification mode: The compressor (1) is turned on, the water pump (6) is turned on, the flow device (3A) is opened, and the flow device (3B) is turned on.

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