Energy storage box dehumidification method, storage medium and energy storage box

Abstract

The present application discloses a dehumidification method for an energy storage box, a storage medium, and an energy storage box. The dehumidification method for an energy storage box includes: obtaining a first temperature and a first relative humidity in the energy storage box; obtaining a first dew point temperature according to the first temperature and the first relative humidity; obtaining a second temperature on the surface of a liquid cooling plate of the energy storage box, and obtaining a second relative humidity according to the first temperature and the second temperature; if the second temperature is lower than the first dew point temperature, and the second relative humidity is lower than the first relative humidity, then starting the dehumidification. The energy storage box dehumidification method of the present application can accurately determine when the dehumidification needs to be started, thereby avoiding both condensation and excessive dehumidification.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage boxes, and in particular to a dehumidification method for energy storage boxes, a storage medium, and an energy storage box. Background Art

[0002] The batteries in the energy storage box will generate heat during the charging and discharging process, and the temperature will drop when idle. This temperature fluctuation will form a temperature difference in the energy storage box, making it easy for water vapor in the air to condense on the surface of the liquid cooling plate inside the energy storage box. Condensation may cause electrical accidents and equipment damage. Summary of the invention

[0003] The embodiments of the present application provide an energy storage box dehumidification method, a storage medium, and an energy storage box. By using the energy storage box dehumidification method of the embodiments of the present application, it is possible to accurately determine when dehumidification needs to be turned on, thereby avoiding condensation and excessive dehumidification.

[0004] In a first aspect, an embodiment of the present application provides a method for dehumidifying an energy storage box, the method comprising:

[0005] Acquiring a first temperature and a first relative humidity in the energy storage box;

[0006] Obtaining a first dew point temperature according to the first temperature and the first relative humidity;

[0007] Acquire a second temperature of the surface of the liquid cooling plate of the energy storage box, and obtain a second relative humidity according to the first temperature and the second temperature;

[0008] If the second temperature is lower than the first dew point temperature, and the second relative humidity is lower than the first relative humidity, dehumidification is started.

[0009] In one embodiment, a first saturated humidity corresponding to the first temperature and a second saturated humidity corresponding to the second temperature are obtained; and the second relative humidity is obtained according to a ratio of the second saturated humidity to the first saturated humidity.

[0010] In one embodiment, the second temperature of the surface of the liquid cooling plate is obtained according to the charging power of the battery system and the cooling level of the liquid cooling system.

[0011] In one embodiment, the second temperature of the surface of the liquid cooling plate is calculated according to the following formula:

[0012] Tc=Ta+(c*m(Tb-Ta)-Q1) / (K*A)

[0013] Among them, A is the surface area of ​​the liquid cooling plate, K is the heat transfer coefficient of the liquid cooling plate, c is the specific heat capacity of the coolant, m is the mass of the coolant flowing through the liquid cooling plate per unit time, Ta is the liquid inlet temperature of the liquid cooling plate, Tb is the liquid outlet temperature of the liquid cooling plate, and Q1 is the heat exchanged between the battery and the liquid cooling plate.

[0014] In one embodiment, a first temperature range corresponding to the first temperature is obtained; and the second relative humidity is obtained according to the first temperature range, the charge and discharge power of the battery system, and the cooling level of the liquid cooling system.

[0015] In one embodiment, a third temperature and a third relative humidity in the energy storage box are obtained, a second dew point temperature is obtained according to the third temperature and the third relative humidity, a fourth temperature of the surface of the liquid cold plate is obtained, and a fourth relative humidity is obtained according to the third temperature and the fourth temperature; if the fourth temperature is higher than the second dew point temperature, or the fourth relative humidity is greater than the third relative humidity, dehumidification is turned off.

[0016] In one embodiment, if the fourth temperature is higher than the third temperature, or the fourth relative humidity is greater than the third relative humidity, timing starts; before reaching the preset time, if the fourth temperature is lower than the third temperature, and the fourth relative humidity is lower than the third relative humidity, dehumidification continues; if the fourth temperature continues to be higher than the third temperature, or the fourth relative humidity continues to be greater than the third relative humidity, dehumidification is turned off.

[0017] In one embodiment, the second temperature of each surface of the liquid cooling plate is obtained, and the corresponding second relative humidity is obtained according to the first temperature and the second temperature; if the second temperature of any surface of the liquid cooling plate is lower than the first dew point temperature, and the corresponding second relative humidity is lower than the first relative humidity, dehumidification is turned on.

[0018] In a second aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the energy storage box dehumidification method described in any one of the above items is implemented.

[0019] In a third aspect, an embodiment of the present application provides an energy storage box, comprising:

[0020] Processor; and

[0021] A memory stores a computer program, and when the computer program is executed by the processor, the processor executes the energy storage box dehumidification method as described in any one of the above items.

[0022] When judging whether to turn on dehumidification, the embodiment of the present application will judge whether the second temperature of the surface of the liquid cold plate is lower than the first dew point temperature of the air in the energy storage box. When the second temperature is lower than the first dew point temperature, the water vapor in the air may reach a saturated state and produce condensation when it encounters a sufficiently cold liquid cold plate surface. Furthermore, the first relative humidity corresponding to the first temperature is obtained, and the second relative humidity is obtained according to the second temperature and the first temperature, and then it is judged whether the second relative humidity is less than the first relative humidity, wherein the first relative humidity can be understood as the actual air humidity in the energy storage box, and the second relative humidity can be understood as the maximum air humidity that the surface of the liquid cold plate can withstand at the second temperature. If the air humidity around the surface of the liquid cold plate is greater than the maximum air humidity that the surface of the liquid cold plate can withstand at the second temperature, then the air is too humid relative to the surface of the liquid cold plate, and based on the second temperature being lower than the first dew point temperature, when the humid air contacts a sufficiently cold liquid cold plate surface, the water vapor in the air will reach a saturated state and condense on the surface of the liquid cold plate. On the contrary, if it is judged that the second temperature is higher than the first dew point temperature, the air will not drop to the first dew point temperature when it contacts the surface of the liquid cooling plate, the water vapor in the air will not be saturated, and condensation will not occur; and / or, when it is judged that the second relative humidity is lower than the first relative humidity, the humidity in the air is lower than the maximum humidity that the surface of the liquid cooling plate can withstand, and even if the water vapor in the air contacts the cold surface of the liquid cooling plate, the water vapor in the air will not condense into dew. Therefore, only when it is judged that the second temperature is lower than the first dew point temperature and the second relative humidity is lower than the first relative humidity, and it is determined that the current air water vapor reaches the conditions for condensation on the surface of the liquid cooling plate, the dehumidification will be turned on in time to prevent dew from condensing on the surface of the liquid cooling plate, so as to ensure the normal operation of the equipment and the stability of the internal environment of the energy storage box. When it is determined that the second temperature is higher than the first dew point temperature, and / or the second relative humidity is greater than the first relative humidity, the dehumidification will not be turned on to ensure that the dehumidification device is turned on only when it is really needed to prevent excessive dehumidification. Excessive dehumidification may also cause the air to be too dry and cause other problems, such as static electricity accumulation or drying and damage of equipment materials, which can save energy and reduce unnecessary operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a flow chart of the energy storage box dehumidification method provided in an embodiment of the present application.

[0025] Figure 2 A schematic diagram of the structure of the energy storage box dehumidification device provided in an embodiment of the present application.

[0026] Figure 3 A schematic diagram of the structure of the energy storage box provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] Please refer to the drawings, where the same component symbols represent the same components. The principle of the present application is illustrated by implementing it in an appropriate computing environment. The following description is based on the illustrated specific embodiments of the present application, which should not be considered as limiting other specific embodiments of the present application that are not described in detail herein.

[0028] See also Figure 1 , Figure 1 : is a schematic diagram of the process of the energy storage box dehumidification method provided in the embodiment of the present application. The energy storage box dehumidification method can be applied to the energy storage liquid cooling energy storage box. The process of the energy storage box dehumidification method can include:

[0029] In 101, a first temperature and a first relative humidity in the energy storage box are obtained;

[0030] In 102, a first dew point temperature is obtained according to a first temperature and a first relative humidity.

[0031] Exemplarily, a first temperature and a first relative humidity in the energy storage box can be obtained by a thermometer or other measuring device, wherein the first relative humidity refers to the ratio of the actual water vapor content in the air in the energy storage box to the maximum water vapor content (first saturated humidity) that the air can reach at the first temperature.

[0032] The first dew point temperature in the energy storage box refers to the temperature point at which the air temperature drops to the point at which the water vapor in the air begins to condense into dew while keeping the actual water vapor content in the air unchanged. The first dew point temperature in the energy storage box can be calculated based on the first temperature and the first relative humidity in the energy storage box. Exemplarily, the first dew point temperature can be calculated by a variety of formulas, such as the Magnus-Tetens approximation method. This embodiment does not limit the calculation method of the first dew point temperature.

[0033] In 103, a second temperature of the surface of the liquid cooling plate is acquired, and a second relative humidity is obtained according to the second temperature.

[0034] The energy storage box includes a battery system and a liquid cooling system, wherein the battery system is the core of the energy storage box, responsible for storing and releasing electrical energy. The battery system may include one or more battery cabinets, each battery cabinet may contain one or more battery packs, each battery pack may include one or more battery modules, each battery module may include one or more battery cells, and the battery cell is the basis for building a battery system and the main source of heat.

[0035] The liquid cooling system is used to manage the heat generated by the battery system. The liquid cooling system includes liquid cooling plates, liquid cooling pipelines and liquid cooling units. The number of liquid cooling plates is adapted to the number of battery packs in the energy storage box to ensure that each battery pack can be properly cooled. Each liquid cooling plate is arranged on the lower side of the corresponding battery pack and contacts the bottom of the battery cell to dissipate heat. The liquid cooling pipeline includes the main liquid inlet pipe, the battery cabinet liquid inlet branch pipe, the battery pack liquid inlet branch pipe, the battery pack liquid outlet branch pipe, the battery cabinet liquid outlet branch pipe and the main liquid outlet pipe. Among them, the main liquid inlet pipe and the main liquid outlet pipe are the main channels of the liquid cooling system, which are responsible for transporting the coolant from the liquid cooling unit to the battery module, and collecting the heated coolant and returning it to the liquid cooling unit. Among them, the liquid cooling unit includes refrigeration equipment, pumps, heat exchangers, etc., which are responsible for the circulation, cooling and recycling of the coolant.

[0036] The liquid inlet and outlet of each liquid cooling plate are connected to the liquid inlet branch pipe and the liquid outlet branch pipe of the battery pack respectively, so that the coolant can absorb the heat generated by each battery cell in the battery pack when flowing through the liquid cooling plate. The liquid inlet branch pipes and liquid outlet branch pipes of all battery packs in a single battery cabinet are connected in parallel to the liquid inlet branch pipe and the liquid outlet branch pipe of the battery cabinet respectively to ensure that the coolant can be distributed to all battery packs in the battery cabinet. The liquid inlet branch pipes and liquid outlet branch pipes of all battery cabinets are connected in parallel to the main liquid inlet pipe and the main liquid outlet pipe respectively, and the main liquid inlet pipe and the main liquid outlet pipe are connected to the liquid cooling unit so that the liquid cooling system of the entire energy storage box forms a unified circulation network.

[0037] The coolant starts from the liquid cooling unit and enters the energy storage box through the main liquid inlet pipe. The coolant is distributed to the liquid inlet of each liquid cooling plate through the battery cabinet liquid inlet branch pipe and the battery pack liquid inlet branch pipe. In the liquid cooling plate, the coolant absorbs the heat generated by the battery module. The heated coolant flows out from the liquid outlet of the liquid cooling plate and returns to the main liquid outlet pipe through the battery pack outlet branch pipe and the battery cabinet outlet branch pipe. The coolant returns to the liquid cooling unit, releases heat in the heat exchanger and is cooled again. The coolant enters the cycle again and continues to flow through the energy storage box for cooling.

[0038] In one embodiment, the second temperature of the surface of the liquid cooling plate is obtained according to the charging power of the battery system and the cooling level of the liquid cooling system.

[0039] It is understandable that the charging power of the battery system is different, and the heat generated by the battery is different, so the heat conducted by the battery to the liquid cooling plate is different, which will affect the second temperature of the surface of the liquid cooling plate. Exemplarily, the charging power of the battery system is positively correlated with the second temperature of the surface of the liquid cooling plate. When the charging and discharging power of the battery system is greater, the heat generated by the battery cell is greater, and the heat conducted to the liquid cooling plate is greater, and the second temperature of the surface of the liquid cooling plate is also greater. The cooling level of the liquid cooling system is different, the temperature of the coolant entering the liquid inlet of the liquid cooling plate is different, and the cooling effect of the coolant is also different, which will also affect the second temperature of the surface of the liquid cooling plate. Exemplarily, the cooling level is inversely correlated with the second temperature of the surface of the liquid cooling plate. When the cooling level is higher, the temperature of the coolant entering the liquid inlet of the liquid cooling plate is also lower. The lower the temperature of the coolant can take away more heat, and the stronger the cooling effect is, so the second temperature of the surface of the liquid cooling plate is also lower.

[0040] Exemplarily, the temperature data of the surface of the liquid cooling plate under different charge and discharge powers and cooling levels can be collected through experiments or historical data, so as to pre-establish a correspondence table between the charge and discharge power of the battery system, the cooling level of the liquid cooling system and the second temperature of the surface of the liquid cooling plate based on these temperature data. By real-time monitoring of the charge and discharge power of the battery system and the cooling level of the liquid cooling system, the accurate surface temperature of the liquid cooling plate can be quickly obtained by querying the correspondence table. In another example, the temperature data of the surface of the liquid cooling plate under different charge and discharge powers and cooling levels are collected, and the thermal model is trained using these data to ensure that the trained thermal model can accurately predict the corresponding surface temperature of the liquid cooling plate under different combinations of charge and discharge powers of the battery system and cooling levels of the liquid cooling system, so that the trained thermal model can be used to quickly predict the accurate second temperature of the surface of the liquid cooling plate.

[0041] In one embodiment, the second temperature of the surface of the liquid cooling plate may be calculated according to the following formula:

[0042] Tc=Ta+(c*m(Tb-Ta)-Q1) / (K*A)

[0043] Among them, A is the surface area of ​​the liquid cooling plate, K is the heat transfer coefficient of the liquid cooling plate, c is the specific heat capacity of the coolant, m is the mass of the coolant flowing through the liquid cooling plate per unit time, Ta is the temperature of the coolant at the liquid inlet of the liquid cooling plate, Tb is the temperature of the coolant at the liquid outlet of the liquid cooling plate, and Q1 is the heat exchanged between the battery and the liquid cooling plate.

[0044] It is understandable that the area A of the liquid cooling plate surface, the heat transfer coefficient K of the liquid cooling plate, the specific heat capacity c of the coolant, and the mass m of the coolant flowing through the liquid cooling plate per unit time are all known constant values ​​in the liquid cooling system. To calculate the second temperature, it is also necessary to obtain the variable parameters, including: the heat Q1 of the heat exchange between the battery and the liquid cooling plate, the liquid inlet temperature Ta of the liquid cooling plate, and the liquid outlet temperature Tb of the liquid cooling plate.

[0045] Exemplarily, the heat Q1 of the heat exchange between the battery and the liquid cooling plate can be obtained from the heat generation data of the battery. For example, the battery system will continuously monitor the voltage, current and temperature of the battery during operation, and calculate the heat generation through various algorithms. Exemplarily, the temperature Ta of the coolant at the liquid inlet of the liquid cooling plate and the temperature Tb of the coolant at the liquid outlet of the liquid cooling plate can be tested according to temperature sensors. Specifically, temperature sensors can be provided at the liquid outlet of the liquid cooling plate and at the liquid outlet of the liquid cooling plate, respectively, and the temperature Ta of the coolant at the liquid inlet of the liquid cooling plate and the temperature Tb of the coolant at the liquid outlet of the liquid cooling plate are measured by the temperature sensors.

[0046] In another example, the heat Q1 of the heat exchange between the battery and the liquid cooling plate can be obtained according to the charge and discharge power of the battery system. When the charge and discharge power of the battery system is greater, the heat generated by the battery system is greater, and the heat Q1 required to be exchanged between the battery and the liquid cooling plate is more, that is, the heat Q1 required to be exchanged between the battery and the liquid cooling plate depends on the charge and discharge power of the battery system. The liquid inlet temperature Ta of the liquid cooling plate is obtained according to the refrigeration level of the liquid cooling system. The higher the refrigeration level, the lower the temperature Ta of the coolant entering the liquid inlet, that is, the temperature Ta of the coolant entering the liquid inlet depends on the refrigeration level of the liquid cooling system. The temperature Tb of the coolant at the liquid outlet is affected by the heat Q1 of the heat exchange of the liquid cooling plate and the temperature Ta of the coolant at the liquid inlet, that is, the temperature Tb of the coolant at the liquid outlet actually depends on the charge and discharge power of the battery system and the refrigeration level of the liquid cooling system. From the above, it can be seen that the three changing parameters in the calculation formula are all related to the charge and discharge power of the battery system and the refrigeration level of the liquid cooling system. Therefore, the second temperature can be obtained according to the charge and discharge power of the battery system and the refrigeration level of the liquid cooling system.

[0047] Exemplarily, a large amount of experimental or historical data can be collected to collect the heat Q1 generated by the battery under different charge and discharge powers and different cooling levels, the temperature Ta of the coolant at the liquid inlet, the temperature Tb of the coolant at the liquid outlet, and various physical parameters of the liquid cooling system, including the area A of the surface of the liquid cooling plate, the heat transfer coefficient K of the liquid cooling plate, the specific heat capacity c of the coolant, and the mass m of the coolant flowing through the liquid cooling plate per unit time, etc. These data are used to train a reliable model to simulate the behavior of the battery system and the liquid cooling system, and to accurately predict the second temperature Tc of the surface of the liquid cooling plate. This embodiment takes into account that the second temperature Tc of the surface of the liquid cooling plate will vary with the charge and discharge power of the battery system and the cooling level of the liquid cooling system. Therefore, when calculating the second temperature Tc of the surface of the liquid cooling plate, the charge and discharge power of the battery system and the cooling level of the liquid cooling system are taken into consideration, so that the second temperature of the surface of the liquid cooling plate can be accurately and quickly calculated.

[0048] After the second temperature of the surface of the liquid cooling plate is obtained, the second relative humidity can be obtained according to the first temperature and the second temperature.

[0049] In one embodiment, a first saturated humidity corresponding to the first temperature and a second saturated humidity corresponding to the second temperature are obtained; and a second relative humidity is obtained according to a ratio of the second saturated humidity to the first saturated humidity. The first saturated humidity is the maximum water vapor content that the air can contain at the first temperature. At the first temperature, when the water vapor content in the air reaches the first saturated humidity, the air can no longer contain more water vapor; the second saturated humidity is the maximum water vapor content that the air can contain at the second temperature. At the second temperature, when the water vapor content in the air reaches the second saturated humidity, the air can no longer contain more water vapor.

[0050] In one embodiment, a first temperature in the energy storage box is obtained, and a first temperature range corresponding to the first temperature is obtained; and a second relative humidity is obtained according to the first temperature range, the charge and discharge power of the battery system, and the refrigeration level of the liquid cooling system.

[0051] Among them, the second relative humidity is the ratio of the second saturated humidity corresponding to the second temperature to the first saturated humidity corresponding to the first temperature. As described in the above embodiment, the charge and discharge power of the battery system and the refrigeration level of the liquid cooling system can be used to determine the second temperature of the surface of the liquid cooling plate, so that the second saturated humidity corresponding to the second temperature can be determined. The first temperature in the energy storage box is divided into temperature intervals, and the first saturated humidity is calculated by using the representative temperature in the temperature interval, such as the middle value or the maximum value, to simplify the calculation process. It can be understood that the first temperature measured in the actual scene may also fluctuate. Using the representative temperature in the corresponding temperature interval can reduce the impact of these fluctuations on the calculation results, so that as long as the first temperature change in the energy storage box does not exceed the temperature interval, the calculated second relative humidity is relatively stable, reducing the impact on the subsequent judgment of whether to turn on dehumidification according to the second relative humidity. In this embodiment, the charge and discharge power of the battery system, the refrigeration level of the liquid cooling system, and the corresponding relationship between the first temperature interval and the second relative humidity can be established in advance, so that the second relative humidity of the battery system and the liquid cooling system under specific working conditions can be quickly determined according to the first temperature in the current box.

[0052] For example, as the temperature increases, the amount of water vapor that the air can hold increases, so as the temperature in the first temperature range increases, the corresponding first saturated humidity also increases. Therefore, when the battery system and the liquid cooling system operate under the same operating conditions, as the temperature in the first temperature range increases, the second relative humidity decreases.

[0053] In 104 , if the second temperature is lower than the first dew point temperature and the second relative humidity is lower than the first relative humidity, dehumidification is started.

[0054] It can be understood that the first dew point temperature is the temperature at which the water vapor content in the air reaches a saturated state. When the surface temperature of the liquid cooling plate is lower than the first dew point temperature of the air, the water vapor in the air will reach a saturated state and begin to condense when it encounters the cold surface of the liquid cooling plate. When the surface temperature of the liquid cooling plate is not lower than the first dew point temperature of the air, the water vapor in the air will not reach a saturated state on the surface of the liquid cooling plate, and thus will not condense.

[0055] In the scenario where the second temperature is judged to be lower than the first dew point temperature, this embodiment will continue to judge whether the second relative humidity is lower than the first relative humidity. Only when the second relative humidity is lower than the first relative humidity will the dehumidification be turned on. Among them, the first relative humidity can be understood as the current actual air humidity, and the second relative humidity can be understood as the maximum air humidity that the surface of the liquid cooling plate can withstand at the second temperature. If the humidity of the air around the surface of the liquid cooling plate is greater than the maximum air humidity that the surface of the liquid cooling plate can withstand at the second temperature, the air is too humid relative to the surface of the liquid cooling plate, and condensation may occur when the water vapor in the air contacts the surface of the liquid cooling plate. Therefore, condensation may only occur when the first relative humidity is greater than the second relative humidity. On the contrary, when the second relative humidity is lower than the first relative humidity, the humidity in the air is less than the maximum air humidity that the surface of the liquid cooling plate can withstand. Even if the water vapor in the air contacts the cold surface of the liquid cooling plate, the water vapor in the air will not condense into dew.

[0056] Exemplarily, the first relative humidity refers to the ratio of the actual water content (current humidity) in the ambient air to the maximum water vapor content (first saturated humidity) that the air can reach at the first temperature. The second relative humidity refers to the ratio of the maximum water vapor content (second saturated humidity) that the air can reach at the second temperature to the maximum water vapor content (first saturated humidity) that the air can reach at the first temperature. Therefore, the comparison between the first relative humidity and the second relative humidity is actually the comparison between the current water vapor content (current humidity) of the air in the energy storage box and the maximum water vapor content (second saturated humidity) that the air can reach at the second temperature.

[0057] It is understandable that if the current humidity of the air in the energy storage box is greater than the second saturated humidity corresponding to the second temperature of the liquid cooling plate surface, it means that the water vapor content in the air is already higher than the saturated water vapor content of the air at the second temperature of the liquid cooling plate surface. In other words, the air is too humid relative to the surface of the liquid cooling plate. When the humid air contacts the cold surface of the liquid cooling plate, since the second temperature of the liquid cooling plate surface is lower than the first dew point temperature of the air, the water vapor in the air will quickly reach a saturated state and begin to condense on the surface of the liquid cooling plate to form dew.

[0058] In this embodiment, when it is determined that the second temperature is lower than the first dew point temperature and the second relative humidity is lower than the first relative humidity, when it is determined that the current air water vapor reaches the condition of condensation on the surface of the liquid cold plate, dehumidification measures are taken in time to reduce the water vapor content in the air and prevent dew from condensing on the surface of the liquid cold plate to ensure the normal operation of the equipment and the stability of the internal environment of the energy storage box. When the second temperature is higher than the first dew point temperature, or the second relative humidity is lower than the first relative humidity, the dehumidification will not be turned on. It can be understood that when the second temperature is higher than the first dew point temperature, the air will not drop to the first dew point temperature when it contacts the surface of the liquid cold plate, and the water vapor will not reach saturation, so the water vapor in the air will not condense on the surface of the liquid cold plate. And / or, when the second relative humidity is lower than the first relative humidity, the water vapor content in the air is lower than the content required to reach saturation at the surface temperature of the liquid cold plate, and even if the water vapor in the air contacts the cold surface of the liquid cold plate, the water vapor in the air will not condense into dew. Therefore, the energy storage box dehumidification method of this embodiment can also ensure that the dehumidification device is turned on only when it is really needed, which helps to prevent excessive dehumidification. Excessive dehumidification may also cause the air to be too dry and cause other problems, such as static electricity accumulation or drying and damage of equipment materials, which can save energy and reduce unnecessary operating costs.

[0059] It should be noted that the liquid cooling system of the energy storage box includes multiple liquid cooling plates, and the second temperature of the surface of each liquid cooling plate can be obtained, and the second relative humidity corresponding to the surface of each liquid cooling plate can be calculated according to the second temperature of the surface of each liquid cooling plate. Exemplarily, if the second temperature of any liquid cooling plate surface is lower than the first dew point temperature of the air in the energy storage box, and the second relative humidity is lower than the first relative humidity of the air in the energy storage box, the dehumidification is turned on, which can effectively avoid condensation on the surface of each liquid cooling plate in the energy storage box. In another example, a ratio can also be set, such as 20%, 30%, 50%, etc. If more than a certain proportion of the second temperature of the surface of the liquid cooling plate is lower than the first dew point temperature, and the second relative humidity is lower than the first relative humidity, the dehumidification is turned on. In this embodiment, the dehumidification strategy can be selected according to the overall performance requirements of the energy storage box. It can be based on the state of a single liquid cooling plate or the state of multiple liquid cooling plates can be comprehensively evaluated to determine whether the dehumidification needs to be turned on. This embodiment is not limited to this.

[0060] In one embodiment, as described above, since the corresponding relationship between the charge and discharge power of the battery system, the cooling level of the liquid cooling system, and the first temperature range and the second relative humidity can be established in advance, when it is determined that the second temperature on the surface of the liquid cooling plate is lower than the dew point temperature of the ambient air, the second relative humidity can be quickly determined based on the first temperature in the current energy storage box, the charge and discharge power of the battery system, and the cooling level of the liquid cooling system. If the second relative humidity is lower than the first relative humidity, the dehumidification is turned on in time, and all areas in the energy storage box where condensation water may be generated can be dehumidified to avoid the existence of condensation water blind spots, thereby more effectively managing and controlling the humidity in the energy storage box, protecting the internal equipment from moisture and condensation water damage, and improving the controllability of the internal environment of the energy storage box and the safety of the equipment.

[0061] In some embodiments, if the second temperature is lower than the first temperature and the second relative humidity is lower than the first relative humidity, after the dehumidification is turned on, the third temperature and the third relative humidity in the energy storage box are obtained, and the second dew point temperature is obtained according to the third temperature and the third relative humidity, and the fourth temperature of the surface of the liquid cold plate is obtained, and the fourth relative humidity is obtained according to the fourth temperature; if the fourth temperature is higher than the second dew point temperature, or the fourth relative humidity is greater than the third relative humidity, the dehumidification is turned off.

[0062] After turning on the dehumidification device, this embodiment will continue to monitor new environmental parameters in the energy storage box, including the third temperature and the third relative humidity. According to the third temperature and the third relative humidity, the second dew point temperature is calculated. At the same time, the fourth temperature of the surface of the liquid cold plate is obtained again, and the fourth relative humidity is obtained according to the third temperature and the fourth temperature. If the fourth temperature is higher than the second dew point temperature, or the fourth relative humidity is greater than the third relative humidity, this means that the surface of the liquid cold plate is no longer in a state that may cause condensation, and the dehumidification device can be turned off. Among them, please refer to the above embodiment for the method of obtaining the second dew point temperature, the fourth temperature, and the fourth relative humidity, which will not be repeated here. The liquid cooling system can dynamically adjust the operation of the dehumidification device according to real-time data to ensure that the temperature and humidity of the internal environment of the energy storage box are in the best state, which not only avoids condensation, but also avoids excessive dehumidification, and can also save energy.

[0063] In one embodiment, if the fourth temperature is higher than the third temperature, or the fourth relative humidity is greater than the third relative humidity, timing starts; before reaching the preset time, if the fourth temperature is lower than the third temperature, and the fourth relative humidity is lower than the third relative humidity, dehumidification continues; if the fourth temperature continues to be higher than the third temperature, or the fourth relative humidity continues to be greater than the third relative humidity, dehumidification is turned off.

[0064] In this embodiment, after the dehumidification is turned on, if it is monitored that the fourth temperature is higher than the third temperature, or the fourth relative humidity is greater than the third relative humidity, the dehumidification will not be turned off immediately, but the timing will be started. Before the preset time arrives, the fourth temperature is continuously monitored to see whether it is continuously higher than the third temperature, or whether the fourth relative humidity is continuously greater than the third relative humidity. If within the preset time, if it is again monitored that the fourth temperature is lower than the third temperature, and the fourth relative humidity is lower than the third relative humidity, it means that there is still a risk of condensation on the surface of the liquid cold plate, and the dehumidification device is turned on; only if the fourth temperature is continuously higher than the third temperature, or the fourth relative humidity is continuously greater than the third relative humidity within the preset time, the dehumidification device is turned off. This embodiment can identify the true change trend of the third temperature, the fourth temperature, the third relative humidity, and the fourth relative humidity through continuous monitoring of the preset time period, and will not react to short-term fluctuations, which helps to make more accurate control decisions, and can avoid frequent switching of the dehumidification device due to short-term amplitude fluctuations of the third temperature, the fourth temperature, the third relative humidity, and the fourth relative humidity.

[0065] Exemplarily, the energy storage box of this embodiment can be dehumidified by a condensing coil dehumidification device. The condensing coil dehumidification device may include a housing, a coil, a fan, and a drainage system. The fan draws air from the energy storage box into the device, and the air flows through the coil. The low-temperature surface of the coil reduces the air temperature to below the dew point. The water vapor in the air condenses into water droplets on the surface of the cold coil. The condensed water droplets are collected in the drain pan and discharged from the energy storage box through the drain pipe. The dehumidified air is discharged through the fan and returns to the inside of the energy storage box.

[0066] Among them, the condensing coil dehumidifier is located near the top of the energy storage box, which can make full use of the space at the top of the energy storage box. Based on the natural convection principle that hot air rises and cold air falls, the dehumidifier installed on the top can more effectively capture the rising moisture, thereby improving the dehumidification efficiency. In addition, multiple condensing coil dehumidifiers can be evenly installed on the top of the energy storage box to ensure that the humidity of the entire internal space of the energy storage box can be effectively controlled.

[0067] It should be noted that other dehumidification devices can also be used for dehumidification in the energy storage box, such as a fan, an air conditioner, a compression dehumidifier, a rotary dehumidifier, etc. This embodiment does not limit the dehumidification device and can be flexibly selected according to factors such as the size of the energy storage box and the dehumidification requirements.

[0068] See also Figure 2 , Figure 2 The schematic diagram of the structure of the energy storage box dehumidification device provided in the embodiment of the present application. The energy storage box dehumidification device 500 may include: a first acquisition module 501, an adjustment module 502, a second acquisition module 503 and a judgment module 504.

[0069] The acquisition module 501 is used to: acquire a first temperature and a first relative humidity inside the energy storage box.

[0070] The first calculation module 502 is used to obtain a first dew point temperature according to the first temperature and the first relative humidity.

[0071] The second calculation module 503 is used to obtain a second temperature of the surface of the liquid cooling plate of the energy storage box, and obtain a second relative humidity according to the first temperature and the second temperature.

[0072] The judgment module 504 is used to start dehumidification if the second temperature is lower than the first dew point temperature and the second relative humidity is lower than the first relative humidity.

[0073] In one implementation, the second calculation module 503 may be used to: obtain a first saturated humidity corresponding to the first temperature and a second saturated humidity corresponding to the second temperature; and obtain a second relative humidity according to a ratio of the second saturated humidity to the first saturated humidity.

[0074] In one embodiment, the energy storage box includes a battery system and a liquid cooling system, and the second calculation module 503 can be used to calculate the second temperature of the surface of the liquid cooling plate according to the following formula:

[0075] Tc=Ta+(c*m(Tb-Ta)-Q1) / (K*A)

[0076] Among them, A is the surface area of ​​the liquid cooling plate, K is the heat transfer coefficient of the liquid cooling plate, c is the specific heat capacity of the coolant, m is the mass of the coolant flowing through the liquid cooling plate per unit time, Ta is the liquid inlet temperature of the liquid cooling plate, Tb is the liquid outlet temperature of the liquid cooling plate, and Q1 is the heat exchanged between the battery and the liquid cooling plate.

[0077] In one implementation, the second calculation module 503 may be used to: obtain a first temperature range corresponding to the first temperature; and obtain a second relative humidity according to the first temperature range, the charge and discharge power of the battery system, and the cooling level of the liquid cooling system.

[0078] In one embodiment, the judgment module 504 can be used to: obtain a third temperature and a third relative humidity in the energy storage box, obtain a second dew point temperature based on the third temperature and the third relative humidity, obtain a fourth temperature on the surface of the liquid cooling plate, and obtain a fourth relative humidity based on the third temperature and the fourth temperature; if the fourth temperature is higher than the second dew point temperature, or the fourth relative humidity is greater than the third relative humidity, dehumidification is turned off.

[0079] In one embodiment, the judgment module 504 can be used to: start timing if the fourth temperature is higher than the third temperature, or the fourth relative humidity is greater than the third relative humidity; before reaching the preset time, if the fourth temperature is lower than the third temperature, and the fourth relative humidity is lower than the third relative humidity, continue dehumidification; if the fourth temperature continues to be higher than the third temperature, or the fourth relative humidity continues to be greater than the third relative humidity, turn off dehumidification.

[0080] In one embodiment, the judgment module 504 can be used to: obtain the second temperature of each liquid cooling plate surface, and obtain the corresponding second relative humidity based on the first temperature and the second temperature; if the second temperature of any liquid cooling plate surface is lower than the first dew point temperature, and the corresponding second relative humidity is lower than the first relative humidity, dehumidification is turned on.

[0081] An embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed on a computer, the computer executes the process in the energy storage box dehumidification method provided in this embodiment.

[0082] See also Figure 3 , Figure 3 The present invention also provides an energy storage box, wherein the energy storage box 600 includes a memory 601 and a processor 602, and the processor 602 is used to execute the process of the energy storage box dehumidification method provided in the present embodiment by calling the computer program stored in the memory 601.

[0083] Those skilled in the art will understand that Figure 3 The energy storage box structure shown in the figure does not constitute a limitation of the energy storage box, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0084] The application programs stored in the memory 601 include computer programs. The processor 602 executes various functional applications and data processing by running the computer programs stored in the memory 601 .

[0085] The processor 602 is the control center of the energy storage box. It uses various interfaces and lines to connect various parts of the entire energy storage box. It executes various functions of the energy storage box and processes data by running or executing computer programs stored in the memory 601 and calling data stored in the memory 601, thereby monitoring the energy storage box as a whole.

[0086] In this embodiment, the processor 602 in the energy storage box will load the executable code corresponding to the process of one or more application programs into the memory 601 according to the following instructions, and the processor 602 will run the application program stored in the memory 601 to execute:

[0087] Acquiring a first temperature and a first relative humidity in the energy storage box;

[0088] Obtaining a first dew point temperature according to the first temperature and the first relative humidity;

[0089] Acquire a second temperature of the surface of the liquid cooling plate of the energy storage box, and obtain a second relative humidity according to the first temperature and the second temperature;

[0090] If the second temperature is lower than the first dew point temperature, and the second relative humidity is lower than the first relative humidity, dehumidification is started.

[0091] In one embodiment, in obtaining the second relative humidity based on the first temperature and the second temperature, the processor 602 executes obtaining the first saturated humidity corresponding to the first temperature and the second saturated humidity corresponding to the second temperature; and obtains the second relative humidity based on the ratio of the second saturated humidity to the first saturated humidity.

[0092] In one embodiment, the energy storage box includes a battery system and a liquid cooling system. In obtaining the second temperature of the surface of the liquid cooling plate, the processor 602 executes to obtain the second temperature of the surface of the liquid cooling plate according to the charging power of the battery system and the cooling level of the liquid cooling system.

[0093] In one embodiment, in obtaining the second temperature of the surface of the liquid cooling plate, the processor 602 executes the calculation according to the following formula to obtain the second temperature of the surface of the liquid cooling plate: Tc=Ta+(c*m(Tb-Ta)-Q1) / (K*A), wherein A is the surface area of ​​the liquid cooling plate, K is the heat transfer coefficient of the liquid cooling plate, c is the specific heat capacity of the coolant, m is the mass of the coolant flowing through the liquid cooling plate per unit time, Ta is the liquid inlet temperature of the liquid cooling plate, Tb is the liquid outlet temperature of the liquid cooling plate, and Q1 is the heat exchanged between the battery and the liquid cooling plate.

[0094] In one embodiment, in obtaining the second relative humidity according to the first temperature and the second temperature, the processor 602 executes: obtaining a first temperature range corresponding to the first temperature; and obtaining the second relative humidity according to the first temperature range, the charge and discharge power of the battery system, and the cooling level of the liquid cooling system.

[0095] In one embodiment, if the second temperature is lower than the first dew point temperature, and the second relative humidity is lower than the first relative humidity, after the dehumidification is turned on, the processor 602 executes: obtaining a third temperature and a third relative humidity in the energy storage box, obtaining a second dew point temperature according to the third temperature and the third relative humidity, and obtaining a fourth temperature on the surface of the liquid cooling plate, and obtaining a fourth relative humidity according to the third temperature and the fourth temperature; if the fourth temperature is higher than the second dew point temperature, or the fourth relative humidity is greater than the third relative humidity, the dehumidification is turned off.

[0096] In one embodiment, in the process of turning off dehumidification if the fourth temperature is higher than the second dew point temperature, or the fourth relative humidity is greater than the third relative humidity, the processor 602 executes: if the fourth temperature is higher than the third temperature, or the fourth relative humidity is greater than the third relative humidity, starting timing; before reaching the preset time, if the fourth temperature is lower than the third temperature, and the fourth relative humidity is lower than the third relative humidity, continuing dehumidification; if the fourth temperature continues to be higher than the third temperature, or the fourth relative humidity continues to be greater than the third relative humidity, turning off dehumidification.

[0097] In one embodiment, the energy storage box includes a plurality of liquid cooling plates, and if the second temperature is lower than the first dew point temperature, and the second relative humidity is lower than the first relative humidity, dehumidification is turned on, and the processor 602 executes: obtaining the second temperature of the surface of each liquid cooling plate, and obtaining the corresponding second relative humidity according to the first temperature and the second temperature; if the second temperature of the surface of any liquid cooling plate is lower than the first dew point temperature, and the corresponding second relative humidity is lower than the first relative humidity, dehumidification is turned on.

[0098] In the above embodiments, the description of each embodiment has its own emphasis. For the part that is not described in detail in a certain embodiment, please refer to the detailed description of the energy storage box dehumidification method above, and will not be repeated here.

[0099] The energy storage box dehumidification device provided in the embodiment of the present application and the energy storage box dehumidification method in the above embodiment belong to the same concept. Any method provided in the energy storage box dehumidification method embodiment can be run on the energy storage box dehumidification device. The specific implementation process is detailed in the energy storage box dehumidification method embodiment, which will not be repeated here.

[0100] It should be noted that, for the energy storage box dehumidification method of the embodiment of the present application, ordinary technicians in this field can understand that the whole or part of the process of the energy storage box dehumidification method of the embodiment of the present application can be completed by controlling the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, such as a memory, and executed by at least one processor, and the execution process may include the process of the embodiment of the energy storage box dehumidification method. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM, Read Only Memory), a random access memory (RAM, Random Access Memory), etc.

[0101] For the energy storage box of the embodiment of the present application, each functional module can be integrated into a processing chip, or each module can exist physically separately, or two or more modules can be integrated into one module. The above-mentioned integrated module can be implemented in the form of hardware or in the form of software functional modules. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium, such as a read-only memory, a disk or an optical disk.

[0102] The above is a detailed introduction to the energy storage box dehumidification method, device, storage medium and energy storage box provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for dehumidifying an energy storage box, characterized in that: include: Acquiring a first temperature and a first relative humidity in the energy storage box; Obtaining a first dew point temperature according to the first temperature and the first relative humidity; Acquire a second temperature of the surface of the liquid cooling plate of the energy storage box, and obtain a second relative humidity according to the first temperature and the second temperature; If the second temperature is lower than the first dew point temperature, and the second relative humidity is lower than the first relative humidity, dehumidification is started; The obtaining of the second temperature of the surface of the liquid cooling plate of the energy storage box includes: The second temperature of the surface of the liquid cooling plate of the energy storage box is obtained according to the following formula: Tc=Ta+(c*m(Tb-Ta)-Q1) / (K*A) Wherein, A is the surface area of ​​the liquid cooling plate, K is the heat transfer coefficient of the liquid cooling plate, c is the specific heat capacity of the coolant, m is the mass of the coolant flowing through the liquid cooling plate per unit time, Ta is the liquid inlet temperature of the liquid cooling plate, Tb is the liquid outlet temperature of the liquid cooling plate, and Q1 is the heat exchanged between the battery and the liquid cooling plate; The obtaining a second relative humidity according to the first temperature and the second temperature includes: Acquire a first saturated humidity corresponding to the first temperature and a second saturated humidity corresponding to the second temperature; The second relative humidity is obtained according to a ratio of the second saturated humidity to the first saturated humidity.

2. The energy storage box dehumidification method according to claim 1, characterized in that: The energy storage box includes a battery system and a liquid cooling system, and obtaining the second temperature of the surface of the liquid cooling plate includes: A second temperature of the surface of the liquid cooling plate is obtained according to the charging power of the battery system and the cooling level of the liquid cooling system.

3. The energy storage box dehumidification method according to claim 1, characterized in that: The obtaining a second relative humidity according to the first temperature and the second temperature includes: Acquire a first temperature interval corresponding to the first temperature; The second relative humidity is obtained according to the first temperature range, the charge and discharge power of the battery system, and the cooling level of the liquid cooling system.

4. The energy storage box dehumidification method according to claim 1, characterized in that: If the second temperature is lower than the first dew point temperature, and the second relative humidity is lower than the first relative humidity, after dehumidification is started, the method further includes: Acquire a third temperature and a third relative humidity in the energy storage box, obtain a second dew point temperature according to the third temperature and the third relative humidity, acquire a fourth temperature on the surface of the liquid cold plate, and obtain a fourth relative humidity according to the third temperature and the fourth temperature; If the fourth temperature is higher than the second dew point temperature, or the fourth relative humidity is greater than the third relative humidity, dehumidification is turned off.

5. The energy storage box dehumidification method according to claim 4, characterized in that: If the fourth temperature is higher than the second dew point temperature, or the fourth relative humidity is higher than the third relative humidity, then turning off dehumidification comprises: If the fourth temperature is higher than the third temperature, or the fourth relative humidity is greater than the third relative humidity, start timing; Before the preset time is reached, if the fourth temperature is lower than the third temperature, and the fourth relative humidity is lower than the third relative humidity, then dehumidification continues; If the fourth temperature is continuously higher than the third temperature, or the fourth relative humidity is continuously higher than the third relative humidity, dehumidification is turned off.

6. The energy storage box dehumidification method according to claim 1, characterized in that: The energy storage box includes a plurality of liquid cooling plates, and if the second temperature is lower than the first dew point temperature and the second relative humidity is lower than the first relative humidity, dehumidification is started, including: Acquire a second temperature of the surface of each of the liquid cooling plates, and obtain a corresponding second relative humidity according to the first temperature and the second temperature; If the second temperature of the surface of any of the liquid cooling plates is lower than the first dew point temperature, and the corresponding second relative humidity is lower than the first relative humidity, dehumidification is started.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the energy storage box dehumidification method according to any one of claims 1 to 6 is implemented.

8. An energy storage box, characterized in that: include: processor; as well as A memory storing a computer program, which, when executed by the processor, enables the processor to execute the energy storage box dehumidification method according to any one of claims 1 to 6.

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