Condensation prevention method and terminal of energy storage system

Abstract

The application discloses a condensate water prevention method and a terminal of an energy storage system, at least two water cooling control modes are preset, the water cooling control mode comprises a battery refrigeration start-stop point and a water temperature refrigeration point; different value ranges of an ambient temperature and corresponding duration conditions of the value ranges are preset, based on a value range and the corresponding duration condition, an entering condition and an exiting condition of one water cooling control mode are determined, the value range has the duration condition; a real-time ambient temperature of the energy storage system is acquired, based on whether the real-time ambient temperature meets the entering condition of any water cooling control mode, if yes, an adaptive water cooling control mode is selected; and the water cooling unit of the energy storage system is controlled according to the battery refrigeration start-stop point and the water temperature refrigeration point of the selected water cooling control mode. The application guarantees that the cooling liquid assists the energy storage system to normally work, and effectively inhibits the generation of condensate water.

Description

Technical Field

[0001] This invention relates to the field of energy storage system maintenance technology, and in particular to a method and terminal for preventing condensation in energy storage systems. Background Technology

[0002] In some regions with consistently high temperatures, the ambient temperature is high. In order to ensure the heat dissipation efficiency of core components such as internal battery modules and inverters, the coolant of the energy storage system needs to be maintained at a low temperature of 18°C ​​or below to ensure the normal operation of the energy storage system. However, this also leads to a significant temperature difference between the cold surface inside the energy storage cabinet and the high-humidity air that intrudes from the outside. Moisture in humid air will condense at electrical connection points (such as busbars and circuit breaker interfaces) and on the surfaces of fire-fighting equipment, forming condensate. This condensate not only corrodes electrical connections, reducing conductivity and connection reliability, but also erodes the metal casing and internal components of fire-fighting equipment. Over time, this can easily affect the normal operation of the energy storage system.

[0003] Therefore, many equipment manufacturers equip their systems with dehumidifiers to prevent condensation. However, dehumidifiers increase the cost and space required for energy storage systems, and their effectiveness is limited in hot weather, making it difficult to fully suppress condensation. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to effectively suppress the generation of condensate while ensuring the normal operation of the coolant-assisted energy storage system.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A method for preventing condensation in an energy storage system, comprising: At least two water cooling control modes are preset, including a battery cooling on / off point and a water temperature cooling point. Different ranges of ambient temperature and corresponding duration conditions are preset. Based on a range of temperature and the corresponding duration conditions, an entry and exit condition for a water cooling control mode is determined. The range of temperature has a duration condition. The real-time ambient temperature of the energy storage system is obtained. Based on whether the real-time ambient temperature meets the entry conditions of any of the water cooling control modes, if so, the appropriate water cooling control mode is selected. The water-cooled unit of the energy storage system is controlled according to the battery cooling start / stop point and water temperature cooling point of the selected water-cooled control mode.

[0006] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows: A condensation prevention terminal for an energy storage system includes a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor is communicatively connected to the energy management unit and the water-cooled unit of the energy storage system, respectively. When the processor runs the computer program, it implements the aforementioned condensation prevention method for the energy storage system.

[0007] The beneficial effects of this invention are as follows: It provides a method and terminal for preventing condensation in an energy storage system, which presets at least two water-cooling control modes and different ranges of ambient temperature. Based on one range, it determines the entry and exit conditions for a water-cooling control mode. This allows different ambient temperatures to correspond to different water-cooling control modes, forming a multi-level adjustment for the battery cooling start / stop point and the water temperature cooling point. When selecting, it accurately selects the battery cooling start / stop point and the water temperature cooling point of the appropriate water-cooling control mode based on whether the real-time ambient temperature meets the range and duration of the entry conditions. This controls the water-cooling unit of the energy storage system, flexibly adjusting the coolant temperature while ensuring the normal heat dissipation needs of core components such as batteries. Since the water-cooling control mode is selected based on the ambient temperature, it can minimize the temperature difference between the cold surface inside the energy storage cabinet and the high-humidity air outside, suppressing condensation generation at the source and ensuring the long-term stable operation of the energy storage system. Attached Figure Description

[0008] Figure 1 This is a schematic diagram illustrating the steps of an energy storage system anti-condensation method according to the present invention; Figure 2 This is a flowchart illustrating the mode selection process for an anti-condensation method for an energy storage system according to an embodiment of the present invention. Figure 3 This is a system block diagram of an anti-condensation terminal for an energy storage system according to an embodiment of the present invention. Detailed Implementation

[0009] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0010] To better understand the technical solution of the present invention, some technical feature terms in the solution are explained below, as shown in Table 1.

[0011] Table 1 Explanation of Technical Features

[0012] To ensure the heat dissipation efficiency of core components such as internal battery modules and inverters, the coolant in an energy storage system must be maintained at a low temperature to guarantee the normal operation of the system. However, in some high-temperature regions, the temperature difference between the ambient temperature and the coolant is significant, resulting in a substantial temperature difference between the cold surface inside the energy storage cabinet and the invading, high-humidity air.

[0013] Condensate can corrode electrical connections, reducing conductivity and connection reliability. It can also erode the metal casing and internal components of fire-fighting equipment. Over time, this can affect the normal operation of the energy storage system.

[0014] To solve at least the above problems, such as Figure 1 and Figure 2 As shown, this invention discloses a method 100 for preventing condensation in an energy storage system, the method comprising: In step 102, at least two water cooling control modes are preset, including battery cooling start / stop point and water temperature cooling point.

[0015] The battery cooling on / off points and water temperature cooling points differ for different water-cooling control modes. Specifically, the battery cooling on / off points are divided into battery cooling start-up points and battery cooling shutdown points. The historical ambient temperature of the target area where the energy storage system is located is obtained. Based on this historical ambient temperature, the battery cooling on / off points and water temperature cooling points for each water-cooling control mode are determined. For example, taking a target area with a long-term high-temperature climate of ≥35℃ as an example, see Table 2.

[0016] Table 2 Control methods for different water-cooling control modes

[0017] It is evident that different water cooling control modes match differentiated battery cooling start / stop points and water temperature cooling points for different environmental conditions. This not only ensures that the battery is always in the optimal operating temperature range and optimizes system energy efficiency and equipment lifespan, but also avoids the generation of condensation on the pipes and battery surface by dynamically matching the water temperature with the ambient dew point temperature and reducing the temperature difference between hot and cold.

[0018] In step 104, different ranges of ambient temperature and corresponding duration conditions are preset. Based on a range of temperature and corresponding duration conditions, the entry and exit conditions of a water cooling control mode are determined. The range of temperature has a duration condition. Different ranges of ambient temperature are preset. Based on a range, the entry and exit conditions of a water cooling control mode are determined. The range has a duration condition.

[0019] In some embodiments, the historical ambient temperature of the target area where the energy storage system is located is obtained; at least two temperature limit values ​​are determined based on the historical ambient temperature; and different value ranges are obtained based on the temperature limit values. The target area is assumed to be in a high-temperature climate with a long-term temperature ≥35℃, and the duration is set at 30 minutes, as shown in Table 3.

[0020] Table 3. Entry and Exit Conditions for Different Water Cooling Control Modes

[0021] Where Ta represents the ambient temperature.

[0022] In some embodiments, to improve the accuracy of determining whether the ambient temperature meets the entry conditions, the real-time inlet temperature of the energy storage system is obtained; the real-time ambient temperature is obtained by subtracting an error correction value from the real-time inlet temperature. The real-time inlet temperature can be collected by the energy storage converter of the energy storage system. This is because the energy storage converter itself needs to monitor the inlet temperature for its own heat dissipation protection, thus eliminating the need for an additional temperature sensor and reducing hardware costs. The magnitude of the error correction value can be obtained based on experience summarizing the historical ambient temperatures of the target area over a long period of time, for example, 5°C.

[0023] In step 106, the real-time ambient temperature of the energy storage system is obtained. Based on whether the real-time ambient temperature meets the entry conditions for any water-cooling control mode, if so, the appropriate water-cooling control mode is selected.

[0024] In some embodiments, before controlling the water-cooled unit of the energy storage system according to the selected water-cooling control mode and after exiting the water-cooling control mode, the water-cooled unit is controlled to run in self-circulation mode for a preset time. This allows for a uniform and stable temperature transition between the battery and water, avoiding thermal shock and condensation, extending equipment lifespan, and improving safety and energy efficiency. The preset time can be selected from 2 minutes to 4 minutes, preferably 2 minutes.

[0025] During the execution of the water-cooling control mode, the cooling hysteresis corresponding to the water temperature cooling point of the selected water-cooling control mode is set; and the water temperature heating point and heating hysteresis are set to form a temperature control hysteresis, which avoids the cooling / heating unit from frequently starting and stopping near the threshold, reduces equipment impact and energy consumption, and at the same time accurately stabilizes the coolant temperature to ensure the battery's operating temperature range.

[0026] In some embodiments, basic operating conditions and corresponding basic control modes are preset; real-time operating parameters of the energy storage system are acquired; based on the real-time operating parameters, it is determined whether the energy storage system meets the basic operating conditions; if not, the basic control mode is invoked to control the water-cooled unit of the energy storage system. The basic operating conditions include at least two types, such as determining whether the communication between the energy management unit and the battery management unit of the energy storage system is normal, determining whether the battery management unit of the energy storage system is under high voltage, and whether the unit communication is normal.

[0027] In some embodiments, a basic operating condition is that the communication between the energy management unit and the battery management unit of the energy storage system is normal. If not, the basic control mode can be selected as the water-cooled unit issuing a cooling water temperature control command. The command content includes: cooling point 18°C, cooling hysteresis 3°C, heating point 10°C, heating hysteresis 3°C.

[0028] Another basic operating condition is that the battery management unit of the energy storage system maintains a high voltage. If not, the basic control mode is that the current system mode is not water-cooled control mode and the liquid outlet temperature is >40°C for 5 minutes. In this case, the basic control mode is to implement the sun exposure prevention strategy.

[0029] Another basic operating condition is that the energy storage system's unit communication is normal. If not, the water-cooled unit of the energy storage system is controlled by the basic control mode or water-cooled control mode most recently used by the energy storage system.

[0030] The above-mentioned content can automatically trigger an adaptive fallback temperature control strategy under various abnormal operating conditions such as communication failure between the energy management unit and the battery management unit, high voltage in the battery management unit, and communication failure of the unit. This not only ensures battery temperature safety in extreme scenarios and prevents the risk of thermal runaway, but also avoids system runaway, while stabilizing the temperature control logic by fixing the hysteresis parameter.

[0031] Furthermore, it presets early warning conditions and corresponding emergency control modes; acquires real-time operating parameters of the energy storage system; and, based on the real-time operating parameters, determines whether the energy storage system meets the early warning conditions. If so, it invokes the emergency control mode to control the water-cooled unit.

[0032] One warning condition is: when the lowest battery temperature is less than 16℃, the emergency control mode is that the water-cooled unit issues a hot water temperature control command, with a cooling hysteresis of 3℃ at the cooling point of 32℃ and a heating hysteresis of 3℃ at the heating point of 26℃, until the lowest battery temperature is greater than 18℃.

[0033] Another warning condition is: the current system mode is not water-cooled control mode and the outlet temperature is >40°C for 5 minutes; at this time, if the charge / discharge rate is ≤0.1 and lasts for 5 minutes, the emergency control mode is that the water-cooled unit issues a cooling water temperature control command, with a cooling point of 18°C ​​and a cooling hysteresis of 3°C; a heating point of 10°C and a heating hysteresis of 3°C, until the outlet temperature is <25°C; if the charge / discharge rate is >0.1 and lasts for 5 minutes, the anti-sun exposure mode is activated.

[0034] Another warning condition is: if the difference between the battery's highest temperature and lowest temperature is ≥6℃, the emergency control mode will be triggered to activate the self-circulation mode until the difference between the battery's highest temperature and lowest temperature is <6℃.

[0035] In step 108, the water-cooled unit of the energy storage system is controlled according to the battery cooling start / stop point and water temperature cooling point of the selected water-cooled control mode.

[0036] In this step, the corresponding cooling start and stop points are triggered based on the ambient temperature, and the corresponding water temperature cooling point and hysteresis are matched to issue precise cooling / heating commands to the water-cooled unit. The unit adjusts the coolant temperature and flow rate in real time, and dynamically balances the battery temperature through heat exchange between the coolant and the battery cluster. At the same time, a self-circulation transition is provided before and after mode switching to ensure a smooth transition between battery and water temperature.

[0037] After each execution of water cooling control mode, basic control mode or emergency control mode, it enters standby mode to wait for the next data acquisition, judgment and processing.

[0038] Reference Figure 3 The present invention discloses an anti-condensation terminal 200 for an energy storage system, including a memory 202, a processor 204, and a computer program stored in the memory 202 and executable on the processor 204. The processor 204 is communicatively connected to the energy management unit and the water-cooled unit of the energy storage system. When the processor 204 runs the computer program, it implements the above-mentioned anti-condensation method for an energy storage system.

[0039] In summary, the present invention provides a method and terminal for preventing condensation in an energy storage system. It presets at least two water-cooling control modes and different ranges of ambient temperature. Based on one range, it determines the entry and exit conditions for a water-cooling control mode. This allows different ambient temperatures to correspond to different water-cooling control modes, forming multi-level adjustments for battery cooling start / stop points and water temperature cooling points. During selection, it accurately selects the battery cooling start / stop points and water temperature cooling points of the appropriate water-cooling control mode based on whether the real-time ambient temperature meets the range and duration of the entry conditions. This controls the water-cooling unit of the energy storage system, flexibly adjusting the coolant temperature while ensuring the normal heat dissipation needs of core components such as batteries. This reduces the temperature difference between the cold surface inside the energy storage cabinet and the high-humidity air outside, fundamentally suppressing condensation generation and ensuring the long-term stable operation of the energy storage system.

[0040] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for preventing condensation in an energy storage system, characterized in that, include: At least two water cooling control modes are preset, including a battery cooling on / off point and a water temperature cooling point. Different ranges of ambient temperature and corresponding duration conditions are preset. Based on a range of temperature and the corresponding duration conditions, an entry and exit condition for a water cooling control mode is determined. The range of temperature has a duration condition. The real-time ambient temperature of the energy storage system is obtained. Based on whether the real-time ambient temperature meets the entry conditions of any of the water cooling control modes, if so, the appropriate water cooling control mode is selected. The water-cooled unit of the energy storage system is controlled according to the battery cooling start / stop point and water temperature cooling point of the selected water-cooled control mode.

2. The method for preventing condensation in an energy storage system according to claim 1, characterized in that, The preset range of different values ​​for the ambient temperature includes: Obtain the historical ambient temperature of the target area where the energy storage system is located; Determine at least two temperature limit values ​​based on the historical ambient temperature; Based on the stated temperature limit values, different value ranges are obtained.

3. The method for preventing condensation in an energy storage system according to claim 2, characterized in that, The preset at least two water-cooling control modes also include: Based on the historical ambient temperature, the battery cooling on / off point and water temperature cooling point are determined for each of the water cooling control modes.

4. The method for preventing condensation in an energy storage system according to claim 1, characterized in that, Also includes: Preset basic operating conditions and corresponding basic control modes; Obtain the real-time operating parameters of the energy storage system; Based on the real-time operating parameters, it is determined whether the energy storage system meets the basic operating conditions. If not, the basic control mode is invoked to control the coolant of the energy storage system. The basic operating conditions are that the communication between the energy management unit and the battery management unit of the energy storage system is normal, or that the battery management unit of the energy storage system maintains a high voltage.

5. The method for preventing condensation in an energy storage system according to claim 4, characterized in that, Also includes: If the communication between the energy management unit of the energy storage system and the water-cooled unit is abnormal, the water-cooled unit of the energy storage system will be controlled according to the basic control mode or the water-cooled control mode most recently used by the energy storage system.

6. The method for preventing condensation in an energy storage system according to claim 1, characterized in that, Also includes: Preset early warning conditions and corresponding emergency control modes; Obtain the real-time operating parameters of the energy storage system; Based on the real-time operating parameters, it is determined whether the energy storage system meets the early warning conditions. If so, the emergency control mode is invoked to control the water-cooled unit.

7. The method for preventing condensation in an energy storage system according to claim 1, characterized in that, The step of controlling the operation of the water-cooled unit of the energy storage system according to the selected water-cooling control mode also includes: Set the cooling hysteresis corresponding to the water temperature cooling point of the selected water cooling control mode; Set the water temperature heating point and heating hysteresis.

8. The method for preventing condensation in an energy storage system according to claim 1, characterized in that, The specific steps for obtaining the real-time ambient temperature of the energy storage system are as follows: Obtain the real-time air inlet temperature of the energy storage system; The real-time ambient temperature is obtained by subtracting the error correction value from the real-time air inlet temperature.

9. A method for preventing condensation in an energy storage system according to claim 1, characterized in that, Before controlling the water-cooled unit of the energy storage system according to the selected water-cooling control mode, the following is also included: Control the water-cooled unit to operate in self-circulation mode for a preset time.

10. A condensate protection terminal for an energy storage system, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor is communicatively connected to the energy management unit and the water-cooled unit of the energy storage system, respectively. When the processor runs the computer program, it implements the anti-condensation method of the energy storage system according to any one of claims 1 to 9.

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