Anti-condensation control system and method for liquid cooling outdoor energy storage equipment

Abstract

The invention discloses an anti-condensation control system and method for liquid cooling outdoor energy storage equipment. The anti-condensation control system comprises a cabinet, a liquid cooling machine, an energy storage battery pack unit, a dehumidifier, a water outlet pipe, a water return pipe, a temperature and humidity sensor and a main control system module, when RH is smaller than RH0, the temperature value T0 of the dew point is calculated according to the temperature TA and the humidity value RH in the battery bin, when the temperature T1 of the water outlet of the liquid cooling machine is smaller than T0, the main control system module needs to control the liquid cooling machine to enable the temperature of the water outlet of the liquid cooling machine to be increased to T2, and T2-T0 is the preset temperature difference; and when RH is larger than RH0, the dehumidifier is started to work until RH is smaller than RH0. According to the invention, the dew point temperature value can be calculated through the calculation module according to the humidity and temperature in the battery compartment, and the control instruction is directly sent to the liquid cooling machine through the main control system module of the energy storage equipment, so that the heating control of the circulating water cooling system is realized, and the effects of dehumidification and condensation prevention are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-condensation of energy storage equipment, and in particular to an anti-condensation control system and method for liquid-cooled outdoor energy storage equipment. Background Art

[0002] Outdoor liquid-cooled energy storage equipment generally includes energy storage battery packs, high-voltage boxes, PCS, liquid cooler cooling systems, EMS controllers, etc. There are generally two ways to cool the battery pack: air cooling and liquid cooling. For battery packs with larger capacity, liquid cooling must be used.

[0003] However, when using liquid cooling, if the humidity inside the energy storage cabinet is high and the temperature difference between the inside and outside of the cabinet is large, if it is not properly controlled, condensation will easily form on the water circulation pipes and battery packs. When a large amount of condensation is generated, the risk of device damage and danger increases.

[0004] In order to ensure that outdoor liquid-cooled energy storage equipment can still work reliably in high-humidity areas, it must be equipped with anti-condensation capabilities. The general measures to prevent condensation are heating and dehumidification, but long-term use of heating and dehumidification devices will not only consume energy, but heating will also affect the heat dissipation of the battery pack. Therefore, it is most critical to detect when to turn on the dehumidification device and control the heat dissipation temperature of the water cooling system within a reasonable range.

[0005] The current traditional heat dissipation mode is: set the temperature T0 of the water outlet of the liquid cooler in advance. When the coolant passes through the battery pack and the return liquid temperature T1>T0, the liquid cooler will cool to ensure that the outlet temperature of the liquid cooler is still T0 in the next cycle. When the return liquid temperature T1<T0, the liquid cooler will heat to maintain the outlet temperature of the liquid cooler at T0, thereby ensuring that the battery cell temperature remains within a reasonable range.

[0006] The current traditional dehumidification mode is: select a dehumidifier with appropriate configuration, set the dehumidifier's starting humidity point RH0 in advance, and when the sensor detects that the ambient humidity is greater than RH0, the dehumidifier starts dehumidifying, and stops working when the ambient humidity inside the cabinet is less than RH0.

[0007] The current problem with the system is that the fixed water outlet temperature T0 is likely to be consistent with the dew point of the environment, resulting in a lot of condensation on the battery pack. The working state of the dehumidifier is relatively simple, and the sensor has a discrete area. In this area, the condensation sensor is not sensitive to changes in dew point conditions and cannot correctly detect dew point conditions. In other words, condensation may have occurred before the anti-condensation device is turned on, and the prevention function cannot be achieved: If the condensation sensor is installed in an unreasonable position, or the surface of the condensation sensor is contaminated by dust or gas, it is very likely that the dew point conditions cannot be correctly detected, causing condensation in the cabinet, but the anti-condensation device is not turned on, which will have serious consequences. Summary of the invention

[0008] To this end, the present invention provides an anti-condensation control system and method for a liquid-cooled outdoor energy storage device to solve the above-mentioned problems in the prior art.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A condensation prevention control system and method for a liquid-cooled outdoor energy storage device, comprising a cabinet, a liquid cooler, an energy storage battery pack unit, a dehumidifier, a water outlet pipe, a water return pipe, a temperature and humidity sensor, and a main control system module;

[0011] The energy storage battery pack unit is arranged inside the cabinet, and the energy storage battery pack unit is provided with multiple groups from top to bottom, and each group of energy storage battery pack units is provided with a liquid cooling device, and the liquid cooling device of the energy storage battery pack unit is provided with a battery pack water inlet pipe and a battery pack drainage pipe, and each battery pack water inlet pipe is connected to the water outlet pipe; each battery pack drainage pipe is connected to the return water pipe;

[0012] The liquid cooler is arranged below the energy storage battery pack unit, and the water outlet and water return port of the liquid cooler are respectively connected to the water outlet pipe and the water return pipe; a dehumidifier is arranged on the cabinet door, and a temperature and humidity sensor is arranged on the side of the dehumidifier;

[0013] The main control system module is located below the liquid cooler, and the liquid cooler, the temperature and humidity sensor and the dehumidifier are all electrically connected to the main control system module.

[0014] Further: a temperature sensor is provided at the water outlet of the liquid cooler.

[0015] Further: a drain outlet is provided at the bottom of the dehumidifier, and the drain outlet is connected to a drain pipe.

[0016] Further: a temperature sensor is provided on the return water pipe.

[0017] The present invention also discloses a method for preventing condensation of a liquid-cooled outdoor energy storage device, and the specific steps are as follows:

[0018] S1. Obtain the humidity value RH, ambient temperature value TA and water outlet temperature T1 of the cabinet in real time;

[0019] S2. Under the rated charge and discharge state of the battery pack, determine the size of RH and RH0, where RH0 is the humidity value set for the dehumidifier;

[0020] S3. When RH < RH0, the dew point temperature T0 is calculated according to the temperature TA and humidity value RH in the battery compartment. When the temperature T1 at the outlet of the liquid cooler is < T0, the main control system module is required to control the liquid cooler to increase the outlet temperature of the liquid cooler to T2, where T2-T0 is the preset temperature difference;

[0021] S4. When RH>RH0, start the dehumidifier until RH﹤RH0, and then repeat step S3.

[0022] Further: the outlet temperature of the liquid cooler is increased to T2 by heating.

[0023] Further: the preset temperature difference is 5 to 15°C.

[0024] Further: The temperature value of T2 cannot exceed 35 degrees.

[0025] Further: the dew point temperature value is obtained by looking up the corresponding relationship table between the dew point temperature and the temperature and humidity in the cabinet.

[0026] The present invention has the following advantages: the present invention can calculate the dew point temperature value through a calculation module according to the humidity and temperature in the battery compartment, and directly send a control instruction to the liquid cooler through the main control system module of the energy storage device to realize heating control of the circulating water cooling system, thereby achieving the effect of dehumidification and anti-condensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of an anti-condensation control system for a liquid-cooled outdoor energy storage device of the present invention.

[0028] Figure 2 for Figure 1 Schematic diagram of the local method structure.

[0029] Figure 3 The present invention is a flow chart of an anti-condensation control method for a liquid-cooled outdoor energy storage device.

[0030] In the figure: 1. Cabinet; 2. Liquid cooler; 3. Energy storage battery pack unit; 4. Dehumidifier; 5. Water outlet pipe; 6. Water return pipe; 7. Temperature and humidity sensor; 8. Main control system module; 9. Battery pack drain pipe; 10. Battery pack water inlet pipe. DETAILED DESCRIPTION

[0031] The following is an explanation of the implementation of the present invention by specific specific examples. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. It should be understood that these embodiments are only to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field can make some non-essential improvements and adjustments to the present invention based on the contents of the above invention; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1-2 As shown, a condensation prevention control system for a liquid-cooled outdoor energy storage device includes a cabinet 1, a liquid cooler 2, an energy storage battery pack unit 3, a dehumidifier 4, a water outlet pipe 5, a water return pipe 6, a temperature and humidity sensor 7, and a main control system module 8; the energy storage battery pack unit 3 is arranged inside the cabinet 1, and the energy storage battery pack unit 3 is provided with multiple groups from top to bottom, and each group of energy storage battery pack units 3 is provided with a liquid cooling device, and the liquid cooling device of the energy storage battery pack unit 3 is provided with a battery pack water inlet pipe 10 and a battery pack drainage pipe 9, and each battery pack water inlet pipe 10 is connected to the water outlet pipe 5; each battery pack drainage pipe 9 is connected to the water return pipe 6;

[0033] The liquid cooler 2 is arranged below the energy storage battery pack unit 3, and the water outlet and water return port of the liquid cooler 2 are connected to the water outlet pipe 5 and the water return pipe 6 respectively; thereby, the coolant of the liquid cooler 2 can circulate back and forth in the energy storage battery pack unit 3, thereby completing the heat dissipation and cooling of the energy storage battery pack unit 3.

[0034] In addition, a temperature sensor is provided at the water outlet of the liquid cooler 2, so that the temperature of the coolant when it comes out of the liquid cooler 2 can be known in real time.

[0035] In order to improve the effect, a temperature sensor may also be provided on the water return pipe 6 so as to more accurately understand the temperature of the coolant.

[0036] A dehumidifier 4 is disposed on the door of the cabinet 1 , and a temperature and humidity sensor 7 is disposed on the side of the dehumidifier 4 .

[0037] The main control system module 8 is located below the liquid cooler 2 . The liquid cooler 2 , the temperature and humidity sensor 7 and the dehumidifier 4 are all electrically connected to the main control system module 8 . The main control system module 8 can control the opening or closing of the liquid cooler 2 and the dehumidifier 4 .

[0038] The dehumidifier 4 is provided with a drain outlet at the bottom, and the drain outlet can be connected to a drain pipe. The water outlet of the drain pipe can be set according to actual needs and is generally set on the outside of the cabinet 1.

[0039] The anti-condensation control system of the present invention can obtain the humidity value, ambient temperature value and the temperature of the water outlet of the liquid cooler in real time in the cabinet 1; under the rated charge and discharge state of the battery pack, when the humidity value in the cabinet 1 is greater than the humidity value set for the dehumidifier 4 to work, the dehumidifier 4 starts to work until the humidity value in the cabinet 1 is less than the humidity value set for the dehumidifier 4 to work;

[0040] When the humidity value in the cabinet 1 is lower than the humidity value set for the dehumidifier 4, compare the temperature of the water outlet of the liquid cooler 2 with the dew point value. When the temperature of the water outlet of the liquid cooler 2 is lower than the dew point value, condensation may occur again. At this time, it is necessary to heat the liquid in the liquid cooler 2 so that the temperature of the water outlet of the liquid cooler 2 is 5 to 15°C higher than the dew point value to prevent condensation.

[0041] like Figure 3 As shown, a method for preventing condensation from occurring in a liquid-cooled outdoor energy storage device is provided, and the specific steps are as follows:

[0042] S1. Obtain the humidity value RH in the cabinet, the ambient temperature value TA, and the temperature T1 of the water outlet of the liquid cooler in real time.

[0043] S2. Under the rated charge and discharge state of the battery pack, determine the size of RH and RH0 (the set humidity value of the dehumidifier).

[0044] S3. When RH < RH0, the dew point temperature T0 is calculated according to the temperature TA and humidity value RH in the battery compartment. When the temperature T1 of the water outlet of the liquid cooler is < T0, the main control system module needs to control the liquid cooler to increase the outlet temperature of the liquid cooler to T2. Generally, heating is used to increase the outlet temperature of the liquid cooler to T2, where T2-T0 is the preset temperature difference, generally 5-15°C.

[0045] S4. When RH>RH0, start the dehumidifier until RH﹤RH0, and then repeat step S3.

[0046] The temperature value of T2 cannot exceed 35 degrees.

[0047] Calculation of dew point temperature: The dew point temperature T0 is calculated according to the temperature and humidity values ​​in the cabinet 1 using the pre-set calculation module of the main control system module 8. The dew point temperature value can be obtained by looking up the corresponding relationship table between the dew point temperature and the temperature and humidity in the cabinet.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-condensation control system for a liquid-cooled outdoor energy storage device, characterized in that: It includes a cabinet (1), a liquid cooler (2), an energy storage battery pack unit (3), a dehumidifier (4), a water outlet pipe (5), a water return pipe (6), a temperature and humidity sensor (7) and a main control system module (8); The energy storage battery pack unit (3) is arranged inside the cabinet (1), and the energy storage battery pack unit (3) is provided with a plurality of groups from top to bottom, and each group of energy storage battery pack units (3) is provided with a liquid cooling device, and the liquid cooling device of the energy storage battery pack unit (3) is provided with a battery pack water inlet pipe (10) and a battery pack water discharge pipe (9), and each battery pack water inlet pipe (10) is connected to a water outlet pipe (5); and each battery pack water discharge pipe (9) is connected to a water return pipe (6); The liquid cooling machine (2) is arranged below the energy storage battery pack unit (3), and the water outlet and water return port of the liquid cooling machine (2) are respectively connected to the water outlet pipe (5) and the water return pipe (6); a dehumidifier (4) is arranged on the cabinet door of the cabinet (1), and a temperature and humidity sensor (7) is arranged on the side of the dehumidifier (4); The main control system module (8) is located below the liquid cooling machine (2), and the liquid cooling machine (2), the temperature and humidity sensor (7) and the dehumidifier (4) are all electrically connected to the main control system module (8); A temperature sensor is provided at the water outlet of the liquid cooling machine (2).

2. The anti-condensation control system of a liquid-cooled outdoor energy storage device according to claim 1, characterized in that: The bottom of the dehumidifier (4) is provided with a drain outlet, and the drain outlet is connected to a drain pipe.

3. An anti-condensation control system for a liquid-cooled outdoor energy storage device according to any one of claims 1-2, characterized in that: The water return pipe (6) is provided with a temperature sensor.

4. A method for preventing condensation of a liquid-cooled outdoor energy storage device, characterized in that: The specific steps are as follows: S1. Obtain the humidity value RH, ambient temperature value TA and water outlet temperature T1 of the cabinet in real time; S2. Under the rated charge and discharge state of the battery pack, determine the size of RH and RH0, where RH0 is the humidity value set for the dehumidifier; S3. When RH < RH0, the dew point temperature T0 is calculated according to the temperature TA and humidity value RH in the battery compartment. When the temperature T1 at the outlet of the liquid cooler is < T0, the main control system module is required to control the liquid cooler to increase the outlet temperature of the liquid cooler to T2, where T2-T0 is the preset temperature difference; S4. When RH>RH0, start the dehumidifier until RH﹤RH0, and then repeat step S3.

5. The anti-condensation control method for liquid-cooled outdoor energy storage equipment according to claim 4, characterized in that: The outlet temperature of the liquid cooler is raised to T2 by heating.

6. The anti-condensation control method for liquid-cooled outdoor energy storage equipment according to claim 4, characterized in that: The preset temperature difference is 5 to 15°C.

7. The anti-condensation control method for liquid-cooled outdoor energy storage equipment according to claim 4, characterized in that: The temperature value of T2 cannot exceed 35 degrees.

8. The anti-condensation control method for liquid-cooled outdoor energy storage equipment according to claim 4, characterized in that: The dew point temperature value is obtained by looking up the corresponding relationship table between the dew point temperature and the temperature and humidity in the cabinet.

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