Method for inhibiting formation of condensed water of energy storage system

Abstract

The invention relates to a method for inhibiting formation of condensate water of an energy storage system, which comprises an energy storage cabinet internally provided with a DTU and a heating device, temperature sensors are mounted inside and outside the energy storage cabinet, and a humidity sensor is further mounted inside the energy storage cabinet; the method comprises the following steps that the first temperature and the first humidity of the external environment where the energy storage cabinet is located are obtained, the humidity in the energy storage cabinet is obtained, and the temperature difference between the first temperature and the second temperature is obtained through processing of a DTU; and if the second temperature is smaller than the first temperature, the temperature difference is larger than a preset temperature difference threshold value, and the humidity is larger than a preset humidity threshold value, the DTU issues an instruction to start a heating device to heat the interior of the energy storage cabinet. The energy storage system can be automatically heated, the temperature difference between the interior and the exterior of the energy storage system is reduced, and generation of condensate water is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of energy storage systems, and in particular to a method for inhibiting the formation of condensed water in an energy storage system. Background Art

[0002] The existing energy storage system is mainly composed of batteries, cabinets, BMS (battery management system circuit board), cables, control systems, copper bars, etc., which are used to store and release electrical energy. During the operation of the energy storage cabinet, the batteries in the energy storage cabinet will generate heat, causing the temperature inside the energy storage cabinet to be higher than the temperature of the external environment of the energy storage cabinet. At this time, the energy storage cabinet needs to be cooled in time. However, when the temperature of the external environment of the energy storage cabinet is much higher than the internal temperature of the energy storage cabinet, condensation water will easily form after the external air enters the energy storage cabinet.

[0003] In the prior art, the focus is on heat dissipation of the energy storage cabinet. The heat dissipation principle is mainly to exchange and remove the heat generated by the battery through the flow of low-temperature substances (air, coolant) over the surface of the battery. However, while the battery is dissipating heat, due to the low temperature of the cooling medium and the high ambient temperature, when the high-temperature air encounters a low-temperature object, condensation will form on the surface of the low-temperature object, which will still affect the safe and stable operation of the energy storage cabinet. In order to prevent the formation of condensed water in the energy storage cabinet, the existing solution is to add a desiccant inside the energy storage cabinet to absorb moisture in the internal air through the desiccant to prevent condensation. However, if the desiccant absorbs moisture frequently for a long time, on the one hand, the drying performance of the desiccant will decrease, and on the other hand, the desiccant absorbs a large amount of moisture. When the temperature rises, the moisture absorbed in the desiccant will evaporate again, which will increase the relative humidity inside the energy storage cabinet. Some rely on external air conditioning to control the temperature of the external environment where the energy storage system is located, so as to avoid the formation of condensed water caused by excessive temperature difference between the inside and outside of the energy storage system. This can only change the external environment temperature, but cannot effectively improve the temperature inside the energy storage cabinet in a timely manner. Summary of the invention

[0004] In view of the existing deficiencies, the present invention provides a method for suppressing the formation of condensed water in an energy storage system.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a method for suppressing the formation of condensed water in an energy storage system, comprising an energy storage cabinet with a DTU and a heating device arranged inside, temperature sensors are installed inside and outside the energy storage cabinet, and a humidity sensor is also installed inside the energy storage cabinet; the steps are as follows:

[0006] Acquire a first temperature and a first humidity of the external environment of the energy storage cabinet, acquire the humidity inside the energy storage cabinet, and obtain a temperature difference between the first temperature and the second temperature through processing by the DTU;

[0007] If the second temperature is lower than the first temperature and the temperature difference is greater than a preset temperature difference threshold, and the humidity is greater than a preset humidity threshold, the DTU sends an instruction to start the heating device to heat the inside of the energy storage cabinet.

[0008] Preferably, the temperature difference threshold is 10°C.

[0009] Preferably, the humidity threshold is 60%.

[0010] Preferably, the energy storage cabinet comprises a cabinet body, at least one battery module is arranged in the cabinet body, a mounting frame is arranged in the cabinet body above the battery module and is spaced apart from the inner wall of the cabinet body by a gap, the heating device is a PTC heating module, the DTU and the PTC heating module are mounted on opposite sides of the mounting frame, the temperature sensor and the humidity sensor are mounted on the cabinet body, and the PTC heating module, the temperature sensor and the humidity sensor are all electrically connected to the DTU.

[0011] Preferably, the battery module comprises a module shell, a plurality of battery packs arranged in the module shell in a row and column structure, and a first fan installed on the module shell. The module shell is provided with shell ventilation holes on a surface on the side opposite to the installation of the first fan, and ventilation channels are formed between two adjacent battery packs and between the battery packs and the inner wall of the module shell.

[0012] Preferably, the PTC heating module is connected in series with a fuse.

[0013] Preferably, a plurality of mounting brackets are arranged in parallel and spaced apart from each other from bottom to top in the cabinet, and the mounting frame is installed on the uppermost mounting bracket.

[0014] Preferably, the mounting frame includes a U-shaped base and a partition installed in the base, the DTU and the PTC heating module are installed on two opposite surfaces of the partition, a base through hole is provided on the side wall of the base corresponding to the PTC heating module, and a second fan is installed in the base through hole.

[0015] Preferably, the partition includes a transverse partition and a vertical partition, the transverse partition is vertically installed in the middle of the back of the vertical partition, the PTC heating module is installed in the middle of the top surface of the transverse partition, and the DTU is installed on the front of the vertical partition.

[0016] Preferably, two second fans are provided, the PTC heating module is installed between the two second fans, and the DTU is installed on a side away from the PTC heating module.

[0017] The beneficial effect of the present invention is that the present invention processes the temperature and humidity data inside and outside the energy storage cabinet collected in real time by the temperature sensor and the humidity sensor through the DTU and compares them with the preset threshold value, and then judges the temperature and humidity conditions inside the energy storage cabinet and issues corresponding instructions. The heating device performs corresponding operations according to the instructions, so as to realize the energy storage cabinet's own timely and effective automatic temperature adjustment, solve the problems existing in the prior art, and effectively reduce the generation of condensed water inside the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the front side of the energy storage cabinet according to an embodiment of the present invention;

[0019] Figure 2 is a structural schematic diagram of the back side of the energy storage cabinet according to an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of the back side of the mounting frame according to an embodiment of the present invention;

[0021] Figure 4 is a schematic structural diagram of the front side of the mounting frame according to an embodiment of the present invention;

[0022] Figure 5 is a schematic structural diagram of a battery module according to an embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of the structure inside the module housing of an embodiment of the present invention;

[0024] Names and serial numbers of components in the figure: 1-DTU 2-heating device 3-cabinet 30-temperature sensor 31-humidity sensor 32-mounting bracket 4-battery module 40-module housing 41-first fan 42-housing ventilation hole 43-ventilation channel 5-mounting frame 50-base 500-base through hole 51-partition 510-horizontal partition 511-vertical partition 6-second fan. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the purpose, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in conjunction with the accompanying drawings and embodiments below for a clear and complete description. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. In addition, the directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", etc., are only referenced to the directions of the attached diagrams. The directional terms used are for better and clearer explanation and understanding of the present invention, rather than indicating or implying the orientation that the present invention must have, and therefore cannot be understood as limitations on the present invention.

[0026] Embodiments of the present invention Figures 1 to 6 As shown in , a method for suppressing the formation of condensed water in an energy storage system includes an energy storage cabinet having a DTU 1 and a heating device 2 disposed therein, wherein the DTU 1 is a data terminal unit, which includes a communication module, a data processing unit, an interface and wiring, a power management unit, etc. The DTU 1 processes and analyzes the data monitored by the temperature sensor 30 and the humidity sensor 31 and issues a control instruction to control the energy storage cabinet and the heating device 2; the heating device 2 starts heating or turns off heating after receiving the instruction from the DTU 1, the energy storage cabinet is provided with a temperature sensor 30 both inside and outside, and the energy storage cabinet is provided with a humidity sensor 31, the temperature sensor 30 is used to monitor the temperature inside and outside the energy storage cabinet in real time, and the humidity sensor 31 is used to monitor the humidity inside the energy storage cabinet in real time, and the temperature and humidity inside and outside the energy storage cabinet are automatically monitored in real time by the temperature sensor 30 and the humidity sensor 31, so as to better understand the state inside the energy storage cabinet, and the temperature sensor 30 and the humidity sensor 31 disposed in the energy storage cabinet can adopt an integrated temperature and humidity sensor; the steps are as follows:

[0027] The first temperature and the first humidity of the external environment of the energy storage cabinet are obtained, the humidity inside the energy storage cabinet is obtained, and the temperature difference between the first temperature and the second temperature is obtained by processing through DTU 1. The temperature sensor 30 and the humidity sensor 31 are used to monitor and obtain the first temperature, the second temperature and the humidity in real time, and transmit them to DTU 1. DTU 1 processes the obtained data and calculates the corresponding temperature difference, and then compares the first temperature and the second temperature, the temperature difference between the first temperature and the second temperature with the preset temperature difference threshold, and also compares the humidity with the preset humidity threshold. Finally, the corresponding control instruction is issued according to the comparison result. At this time, the temperature difference threshold is 10°C. When the temperature inside the energy storage cabinet and the temperature outside the cabinet differ by less than 10°C, the heat transfer speed inside and outside the energy storage cabinet is slow, and condensation water is not easy to be generated. The preferred temperature difference threshold is not more than 5°C, and the temperature inside the energy storage cabinet is equivalent to that of the external environment, and there will be no obvious heat transfer, and no condensation water will be generated in the energy storage cabinet. The humidity threshold is 60%, and there is a possibility of condensation when it is greater than this value.

[0028] If the second temperature is lower than the first temperature and the temperature difference is greater than the preset temperature difference threshold, the second temperature is lower than the first temperature, which means that the temperature inside the energy storage cabinet is lower than the temperature of the environment outside the energy storage cabinet. At this time, when the air enters the inside of the energy storage cabinet from the outside, it is the air with high temperature flowing into the space with low temperature, and there is a possibility of condensation. At the same time, the temperature difference between them is compared with the preset temperature difference threshold. When the temperature difference between them is greater than the temperature difference threshold, it means that the temperature difference between the inside and outside of the energy storage cabinet is large, and condensation is very likely to be generated. When the second temperature is greater than the first temperature, the temperature inside the energy storage cabinet is higher than the temperature outside the energy storage cabinet, that is, cold air enters the space with high temperature, and condensation will not be generated. When the second temperature is equal to the first temperature, the temperature inside and outside the energy storage cabinet is the same and there is no heat transfer. In these two cases, DTU 1 will not start the heating device to heat. In addition to temperature, the generation of condensation is also affected by humidity. When comparing the temperature, the humidity is also compared. That is, when the humidity is greater than the preset humidity threshold, it means that the humidity inside the energy storage cabinet can generate condensation. After comparing the temperature and humidity, if the above situation is met, DTU 1 sends a command to start the heating device 2 to heat the inside of the energy storage cabinet, and the heating increases the temperature inside the energy storage cabinet to reduce the occurrence of condensed water. In this way, the heating device is used to increase the temperature inside the energy storage cabinet, thereby reducing the temperature difference between the inside and outside of the energy storage cabinet and effectively reducing the generation of condensed water. At the same time, during the heating process of the heating device, if it is detected that the temperature inside the energy storage cabinet continues to rise, it can be determined that the heating device or the second fan is damaged, and DTU 1 sends a shutdown command to shut down the operation of the entire energy storage cabinet.

[0029] Further improvements, such as Figures 1 to 3As shown in the figure, the energy storage cabinet includes a cabinet body 3, at least one battery module 4 is arranged in the cabinet body 3, and a mounting frame 5 is arranged above the battery module 4 in the cabinet body 3 with a gap between the inner wall of the cabinet body 3, and the mounting frame 5 is convenient for integrating the DTU 1 and the heating device 2 together, so as to facilitate the installation inside the energy storage cabinet, the battery module 4 is arranged in the lower part of the cabinet body 3, and the mounting frame 5 is arranged in the upper part of the cabinet body 3, and there is a distance between the two, and at the same time, a control panel can be installed at the front end of the mounting frame 5, and a back plate with through holes can be installed at the rear end; the heating device 2 is a PTC heating module, and the DTU 1 and the PTC heating module are installed on opposite sides of the mounting frame 5, the DTU 1 is installed on the front side of the mounting frame 5, and the PTC heating module is installed on the rear side of the mounting frame 5, so as to reduce the impact of the PTC heating module on the DTU 1 when heating. 1, and the PTC heating module is connected in series with a fuse, so that the problem of excessive temperature caused by heating by the PTC heating module and damaging the energy storage cabinet can be avoided; the temperature sensor 30 and the humidity sensor 31 are installed on the cabinet 3, and the PTC heating module, the temperature sensor 30 and the humidity sensor 31 are all connected to the DTU 1 electrical connection; the temperature sensor 30 is respectively arranged inside and outside the cabinet 3. The temperature sensor 30 arranged outside is used to monitor the temperature outside the cabinet 3, that is, the temperature of the external environment where the energy storage cabinet is located. The temperature sensor 30 arranged inside is used to monitor the temperature inside the cabinet 3. The humidity sensor 31 is arranged inside the cabinet 3 to monitor the humidity inside the cabinet 3. If the temperature sensor 30 and the humidity sensor 31 are arranged in the cabinet 3 according to the number of battery modules 4 arranged, such as being arranged at the position between two adjacent battery modules 4 on the inner wall of the cabinet 3, the ambient temperature of each battery module 4 in the cabinet 3 can be more accurately monitored. At the same time, the temperature sensor 30 and the humidity sensor 31 for monitoring the temperature and humidity at the PTC heating module can also be arranged on the mounting frame 5, so that the temperature and humidity at different positions inside the energy storage cabinet can be monitored; one external temperature sensor 30 can be arranged and arranged on the outer wall or top of the cabinet 3 to monitor the temperature of the external environment where the energy storage cabinet is located. In order to facilitate the installation of the battery module 4, a plurality of mounting brackets 32 are arranged in parallel from bottom to top in the cabinet 3, and the mounting bracket 5 is installed on the uppermost mounting bracket 32; the battery module 4 is installed on the mounting bracket 32 ​​below the mounting bracket 5, that is, the DTU 1 and the PTC heating module are installed at the top, and the battery module 4 is installed at the bottom, so as to facilitate the installation and maintenance of the battery module 4.

[0030] Further improvements such as Figure 5 and Figure 6As shown in the figure, the battery module 4 includes a module shell 40, a plurality of battery packs (not shown in the figure) arranged in the module shell 40 in a row and column structure, and a first fan 41 installed on the module shell 40. If a shell through hole is set on the front side surface of the module shell 40, and the first fan 41 is installed in the shell through hole, the plurality of battery packs are arranged in a row and column structure, which means that there is a gap between two adjacent battery packs, and this gap constitutes a ventilation channel between each battery pack. The module shell 40 is provided with a shell ventilation hole 42 on the side surface opposite to the installation of the first fan 41. The shell ventilation hole 42 and the first fan 41 are arranged on opposite sides of the module shell 40. The first fan 41 is installed on the front side surface of the module shell 40, and the shell ventilation hole 42 is arranged on the module shell 40. On the rear surface, when the first fan 41 blows air, the shell ventilation holes 42 constitute an air outlet for discharging air into the module shell 40; when the first fan 41 sucks air, the shell ventilation holes 42 constitute an air inlet for taking air into the module shell 40. Preferably, a shell ventilation hole 42 is provided on each of the left and right sides of the rear surface of the module shell 40, which is more conducive to the flow of air and can also enable the flowing air to more evenly and comprehensively cover all battery packs to achieve heat exchange. Ventilation channels 43 are formed between two adjacent battery packs and between the battery pack and the inner wall of the module shell 40. When the battery pack is installed in the module shell 40, there is a gap between the battery pack and the inner wall of the module shell 40, and the gap constitutes a ventilation channel therebetween.

[0031] Further improvements such as Figure 2 and Figure 3As shown in the figure, the mounting frame 5 includes a U-shaped base 50, a partition 51 installed in the base 50, the DTU 1 and the PTC heating module are installed on two opposite surfaces of the partition 51, and the partition 51 divides the base 50 into two spaces, the front space and the rear space. The DTU 1 and the PTC heating module are installed on two opposite sides of the partition 51, that is, the DTU 1 and the PTC heating module are in different spaces. For example, if the DTU 1 is installed on the front side surface of the partition 51, the DTU 1 is in the front space, and the PTC heating module is installed in the rear space. At this time, the partition 51 is set to the front side of the base 50 so that the rear space is larger than the front space, which is convenient for the installation of the PTC heating module in the rear space and also conducive to the flow of hot air generated after heating; a base through hole 500 is set on the side wall corresponding to the PTC heating module in the base 50, and a second fan 6 is installed in the base through hole 500. In this way, the second fan 6 promotes air circulation inside and outside the base 50. At this time, the partition 51 includes a transverse partition 510 arranged horizontally at the rear part of the base 50 and a vertical partition 511 arranged vertically at the front part. The transverse partition 510 is vertically installed in the middle of the back side of the vertical partition 511, so that the PTC heating module and the inner side wall of the base are not in contact, which is beneficial to the flow of hot air after heating by the PTC heating module. The PTC heating module is installed in the middle of the top surface of the transverse partition 510, and the DTU 1 is installed on the front side of the vertical partition 511. The transverse partition 510 and the vertical partition 511 form a sideways T-shaped structure, and the transverse partition 510 is separated from the inner bottom surface of the base 50 by a distance. At this time, an L-shaped connector can also be provided on the mounting frame 5, and a mounting hole is provided on the connector. A mounting rod is provided on the inner wall of the energy storage cabinet, and then one end of the connector is installed on the mounting rod by screws through the mounting hole, and the other end of the connector is installed on the mounting frame in the same way. After installation, there is a gap between the mounting frame 5 and the inner wall of the energy storage cabinet, and the gap constitutes a circulation channel for hot air after the PTC heating module heats the air. The second fan 6 accelerates the circulation of air in the energy storage cabinet to keep the temperature inside and outside the energy storage cabinet from having too large a temperature difference. For example, the second fan 6 uses a fan that can rotate forward and reverse. Two second fans 6 are provided, and the PTC heating module is installed between the two second fans 6. The DTU 1 is installed on the side away from the PTC heating module. The two second fans 6 are located on the opposite sides of the PTC heating module, which accelerates the circulation of air; and the DTU 1 is installed on the side away from the PTC heating module, which reduces the adverse effects of the PTC heating module heating on the DTU.

[0032] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A method for inhibiting the formation of condensed water in an energy storage system, characterized in that: It includes an energy storage cabinet with a DTU and a heating device installed inside, temperature sensors are installed inside and outside the energy storage cabinet, and a humidity sensor is also installed inside the energy storage cabinet; the steps are as follows: Acquire a first temperature and a first humidity of the external environment of the energy storage cabinet, acquire the humidity inside the energy storage cabinet, and obtain a temperature difference between the first temperature and the second temperature through processing by the DTU; If the second temperature is lower than the first temperature and the temperature difference is greater than a preset temperature difference threshold, and the humidity is greater than a preset humidity threshold, the DTU sends an instruction to start the heating device to heat the inside of the energy storage cabinet.

2. The method for inhibiting the formation of condensed water in an energy storage system according to claim 1, characterized in that :The temperature difference threshold is 10°C.

3. The method for inhibiting the formation of condensed water in an energy storage system according to claim 1, characterized in that :The humidity threshold is 60%.

4. The method for inhibiting the formation of condensed water in an energy storage system according to claim 1, characterized in that The energy storage cabinet comprises a cabinet body, at least one battery module is arranged in the cabinet body, a mounting frame is arranged in the cabinet body above the battery module and is spaced apart from the inner wall of the cabinet body by a gap, the heating device is a PTC heating module, the DTU and the PTC heating module are mounted on opposite sides of the mounting frame, the temperature sensor and the humidity sensor are mounted on the cabinet body, and the PTC heating module, the temperature sensor and the humidity sensor are all electrically connected to the DTU.

5. The method for inhibiting the formation of condensed water in an energy storage system according to claim 4, characterized in that The battery module comprises a module shell, a plurality of battery packs arranged in the module shell in a row and column structure, and a first fan installed on the module shell. The module shell is provided with shell ventilation holes on a surface on the side opposite to the first fan, and ventilation channels are formed between two adjacent battery packs and between the battery packs and the inner wall of the module shell.

6. The method for inhibiting the formation of condensed water in an energy storage system according to claim 4, characterized in that : The PTC heating module is connected in series with a fuse.

7. The method for inhibiting the formation of condensed water in an energy storage system according to claim 4, characterized in that A plurality of mounting brackets are arranged in parallel from bottom to top in the cabinet, and the mounting bracket is installed on the uppermost mounting bracket.

8. The method for inhibiting the formation of condensed water in an energy storage system according to claim 4, characterized in that The mounting frame includes a U-shaped base and a partition installed in the base, the DTU and the PTC heating module are installed on two opposite surfaces of the partition, a base through hole is provided on the side wall corresponding to the PTC heating module in the base, and a second fan is installed in the base through hole.

9. The method for inhibiting the formation of condensed water in an energy storage system according to claim 8, characterized in that :The partition includes a transverse partition and a vertical partition. The transverse partition is vertically installed in the middle of the back of the vertical partition, the PTC heating module is installed in the middle of the top surface of the transverse partition, and the DTU is installed on the front of the vertical partition.

10. The method for inhibiting the formation of condensed water in an energy storage system according to claim 4, characterized in that : Two second fans are provided, the PTC heating module is installed between the two second fans, and the DTU is installed on the side away from the PTC heating module.

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