An electrochemical energy storage station battery compartment cooling device

Abstract

The application provides an electrochemical energy storage station battery cabin cooling device, which comprises a box air conditioner shell, which is installed outside the battery cabin to form an area for heat exchange with the battery cabin inside the shell; a battery heat dissipation module, which is arranged in the battery cabin to regulate the temperature in the battery cabin; an alternating current heat dissipation module, which is arranged in the box air conditioner shell to regulate the temperature and humidity in the box air conditioner shell; and a monitoring control module, which is connected with the battery heat dissipation module, the heat dissipation and dehumidification module and a battery management unit respectively, is used to collect the temperature, current and voltage information of each battery in the battery cabin and the temperature and humidity information in the box air conditioner shell, and comprehensively regulates the temperature and humidity in the battery cabin and the box air conditioner shell according to various information to meet the working condition requirements. The box air conditioner and the corresponding monitoring control part are designed to regulate the working temperature of the battery cabin to meet the working condition requirements.

Description

Technical Field

[0001] This invention belongs to the field of battery compartment cooling technology, specifically relating to a battery compartment cooling device for an electrochemical energy storage station. Background Technology

[0002] With the continuous development of society and the economy, the requirements for power supply quality are constantly increasing, demanding that the power system possess sufficient power reserves and stable power supply reliability. This presents a new goal for the power system—energy storage. A significant technical challenge in energy storage is the safe and stable charging and discharging of batteries, as well as their efficient maintenance. With the construction of various prefabricated energy storage stations, the installed volume of various types of batteries is increasing, making the safe storage of batteries particularly important. A crucial factor affecting batteries is battery temperature. How to efficiently maintain battery temperature at a low level is a key technical challenge to ensure the long-term safe operation of batteries. Furthermore, because batteries can produce flammable and explosive gases under abnormal conditions, ordinary heat dissipation devices cannot meet the safety requirements within the storage compartment. Therefore, there is an urgent need to develop an electrochemical energy storage station battery compartment cooling system to meet the battery storage requirements of energy storage stations. Summary of the Invention

[0003] In view of this, the present invention aims to provide a battery compartment cooling device for an electrochemical energy storage station to meet the battery storage requirements of the energy storage station.

[0004] To achieve the above-mentioned technical effects, the present invention provides the following technical solution:

[0005] This invention provides a cooling device for the battery compartment of an electrochemical energy storage station, comprising:

[0006] The box-type air conditioner housing is installed outside the battery compartment to form an area for heat exchange with the battery compartment inside the housing.

[0007] The battery cooling module is located inside the battery compartment and is used to regulate the temperature inside the battery compartment.

[0008] An AC cooling module, installed inside the casing of the box-type air conditioner, is used to regulate the temperature and humidity inside the casing.

[0009] The monitoring and control module is connected to the battery heat dissipation module, the heat dissipation and dehumidification module, and the battery management unit, respectively. It is used to collect the temperature, current, and voltage information of each battery in the battery compartment and the temperature and humidity information inside the box-type air conditioner shell. Based on the various information, it comprehensively regulates the temperature and humidity inside the battery compartment and the box-type air conditioner shell to meet the working conditions.

[0010] Furthermore, the battery compartment adopts an 8*15*15 combined battery module array, which specifically includes:

[0011] There are 8 battery rows, each containing 15 sub-battery modules, and each sub-battery module contains 15 individual batteries.

[0012] Furthermore, the temperature inside the battery compartment is regulated within the battery heat dissipation module, specifically as follows:

[0013] The temperature of each battery in the battery compartment is collected and judged in real time. If the temperature of at least one battery is higher than the battery temperature threshold, the battery heat dissipation module will start the heat dissipation work.

[0014] Furthermore, the battery heat dissipation module specifically includes: a first temperature acquisition module, a cooling fan, a first heat dissipation mesh, and a sub-control circuit;

[0015] Each battery is equipped with a first temperature acquisition module. The sub-control circuit monitors the battery temperature through the first temperature acquisition module and starts the cooling fan when the temperature exceeds the temperature threshold, so as to dissipate the heat in the battery compartment through the first heat dissipation mesh.

[0016] Furthermore, the AC cooling module specifically includes: an AC cooling fan, a small compressor, a second heat dissipation grid, a temperature and humidity sensor, and a second temperature acquisition module;

[0017] The second temperature acquisition module is installed inside the casing of the box-type air conditioner and is used to collect temperature information inside the casing and transmit it to the monitoring and control module.

[0018] Temperature and humidity sensors are installed next to the battery compartment to collect temperature and humidity information and transmit it to the monitoring and control module.

[0019] The monitoring and control module analyzes the temperature information inside the casing, the temperature and humidity information next to the battery compartment, and the ambient temperature and humidity information. It controls the operation of the AC cooling fan and the small compressor to discharge heat through the second heat dissipation net, thereby controlling the temperature and humidity inside the box-type air conditioner casing to meet the working conditions.

[0020] Furthermore, the second heat dissipation mesh on the casing of the box-type air conditioner is positioned opposite to the first heat dissipation mesh on the battery compartment.

[0021] Furthermore, it also includes: a smoke monitoring module;

[0022] The smoke monitoring module is connected to the monitoring and control module and is used to send smoke information to the monitoring and control module after smoke is generated in the battery compartment.

[0023] Furthermore, the monitoring and control module also judges the working status of each battery in the battery compartment based on various information, and issues an alarm signal if abnormal operation is detected.

[0024] Furthermore, the monitoring and control module determines the operating status of each battery cell within the battery compartment based on various information, specifically:

[0025] The monitoring and control module determines whether there are sudden changes in the voltage or current of each battery in the battery compartment and whether the temperature difference between each battery exceeds a set threshold. If a sudden change occurs or the set threshold is exceeded, it determines whether smoke information is generated. If not, it generates a battery compartment malfunction signal. If so, it determines whether the temperature inside the box-type air conditioner casing has risen. If so, it generates a battery fire alarm signal. If not, it generates an error judgment signal.

[0026] Furthermore, it also includes: explosion-proof ventilation modules;

[0027] The explosion-proof ventilation module is installed inside the box-type air conditioner casing and is used to periodically exhaust the gas inside the box-type air conditioner casing.

[0028] In summary, this invention provides a cooling device for the battery compartment of an electrochemical energy storage station, comprising a box-type air conditioning housing installed outside the battery compartment to form a region for heat exchange with the battery compartment inside the housing; a battery heat dissipation module disposed inside the battery compartment for regulating the temperature inside the battery compartment; an AC heat dissipation module disposed inside the box-type air conditioning housing for regulating the temperature and humidity inside the box-type air conditioning housing; and a monitoring and control module connected to the battery heat dissipation module, the heat dissipation and dehumidification module, and the battery management unit, respectively, for collecting temperature, current, and voltage information of each battery in the battery compartment and temperature and humidity information inside the box-type air conditioning housing, and comprehensively regulating the temperature and humidity inside the battery compartment and the box-type air conditioning housing based on various information to meet the operating conditions. This invention designs a box-type air conditioning unit and corresponding monitoring and control components to achieve temperature regulation of the battery compartment to meet the operating conditions. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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 effort.

[0030] Figure 1 This is a schematic diagram of the structure of a battery compartment cooling device for an electrochemical energy storage station provided in an embodiment of the present invention;

[0031] Figure 2 This is a structural diagram of the battery compartment provided in an embodiment of the present invention;

[0032] Figure 3 This is a side view of the battery compartment structure provided in an embodiment of the present invention.

[0033] In the attached diagram: 1-Box-type air conditioner housing, 2-Explosion-proof exhaust vent, 3-Battery compartment, 4-Temperature and humidity sensor, 5-Second heat dissipation mesh, 6-AC cooling fan, 7-Drain outlet, 8-Thermistor, 9-Single battery, 10-Cooling fan, 11-Sub-control circuit, 12-Temperature measuring cable, 13-Communication cable, 14-Sub-battery module negative terminal, 15-Sub-battery module positive terminal, 16-First heat dissipation mesh, 17-Battery compartment handle. Detailed Implementation

[0034] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0035] With the continuous development of society and the economy, the requirements for power supply quality are constantly increasing, demanding that the power system possess sufficient power reserves and stable power supply reliability. This presents a new goal for the power system—energy storage. A significant technical challenge in energy storage is the safe and stable charging and discharging of batteries, as well as their efficient maintenance. With the construction of various prefabricated energy storage stations, the installed volume of various types of batteries is increasing, making the safe storage of batteries particularly important. A crucial factor affecting batteries is battery temperature. How to efficiently maintain battery temperature at a low level is a key technical challenge to ensure the long-term safe operation of batteries. Furthermore, because batteries can produce flammable and explosive gases under abnormal conditions, ordinary heat dissipation devices cannot meet the safety requirements within the storage compartment. Therefore, there is an urgent need to develop an electrochemical energy storage station battery compartment cooling system to meet the battery storage requirements of energy storage stations.

[0036] Traditional battery compartment cooling systems have the following problems:

[0037] (1) Traditional battery compartments often use split air conditioners for heat dissipation, which consumes a lot of electricity. The installation and maintenance costs are high, and the electrical structure of the internal fan is not suitable for the special environment inside the battery compartment where flammable and explosive gases may be generated.

[0038] (2) Traditional heat dissipation methods can only rely on a single air conditioner for heat dissipation. A single battery pack does not have an independent temperature acquisition subsystem and the battery temperature monitoring system is not linked with the battery compartment air conditioning system.

[0039] (3) Traditional battery compartments only have a heat dissipation system, no dedicated explosion-proof ventilation device, and no linkage with the centralized monitoring system.

[0040] (4) The traditional battery compartment temperature detection system has a simple logic judgment. The entire battery compartment temperature acquisition and automatic detection control system is relatively simple and is prone to issuing false alarm signals for battery temperature. It cannot make a true judgment on battery temperature and status.

[0041] Based on this, the present invention provides a cooling device for the battery compartment of an electrochemical energy storage station.

[0042] The following is a detailed description of an embodiment of a battery compartment cooling device for an electrochemical energy storage station according to the present invention.

[0043] This embodiment provides a battery compartment cooling device for an electrochemical energy storage station, including: a box-type air conditioner housing, a battery heat dissipation module, an AC heat dissipation module, and a monitoring and control module.

[0044] In this embodiment, a box-type air conditioner housing is installed outside the battery compartment to form an area for heat exchange with the battery compartment inside the housing.

[0045] In this embodiment, the battery heat dissipation module is installed inside the battery compartment to regulate the temperature inside the battery compartment;

[0046] In this embodiment, the AC heat dissipation module is installed inside the box-type air conditioner housing to regulate the temperature and humidity inside the box-type air conditioner housing;

[0047] In this embodiment, the monitoring and control module is connected to the battery heat dissipation module, the heat dissipation and dehumidification module, and the battery management unit, respectively. It is used to collect the temperature, current, and voltage information of each battery in the battery compartment and the temperature and humidity information inside the box-type air conditioner housing. Based on the various information, it comprehensively regulates the temperature and humidity inside the battery compartment and the box-type air conditioner housing to meet the working conditions.

[0048] This embodiment provides a cooling device for the battery compartment of an electrochemical energy storage station, including a box-type air conditioning shell installed outside the battery compartment to form a region for heat exchange with the battery compartment inside the shell; a battery heat dissipation module located inside the battery compartment to regulate the temperature inside the battery compartment; an AC heat dissipation module located inside the box-type air conditioning shell to regulate the temperature and humidity inside the box-type air conditioning shell; and a monitoring and control module connected to the battery heat dissipation module, the heat dissipation and dehumidification module, and the battery management unit, respectively, to collect temperature, current, and voltage information of each battery in the battery compartment, as well as temperature and humidity information inside the box-type air conditioning shell, and to comprehensively regulate the temperature and humidity inside the battery compartment and the box-type air conditioning shell based on various information to meet the operating conditions. The cooling device provided in this embodiment combines various information from inside and outside the battery compartment for comprehensive analysis and control, thereby maintaining a good working environment temperature and humidity within the battery compartment.

[0049] Please see Figure 1-3In a preferred embodiment, the battery compartment 3 adopts an 8*15*15 combined battery module array, i.e., 8 rows of battery columns, each row of battery columns includes 15 sub-battery modules, and each sub-battery module includes 15 single-cell batteries 9. Each sub-module is interconnected in series through its respective sub-battery module positive terminal 15 and sub-battery module negative terminal. Each battery compartment 3 is connected to an external monitoring and control module through a communication cable 13, and a battery compartment handle 17 is provided on the battery compartment 3.

[0050] In a preferred embodiment, the battery cooling module collects the temperature of each battery in the battery compartment 3 and makes a real-time judgment. If the temperature of at least one battery is higher than the battery temperature threshold, the battery cooling module starts the cooling operation. Specifically, the battery cooling module is equipped with a first temperature acquisition module, a cooling fan 10, a first heat dissipation mesh 16, and a sub-control circuit 11. The first temperature acquisition module consists of a thermistor 8 and a temperature measuring cable 12. A set of thermistors 8 and temperature measuring cables 12 is set next to each individual battery 9. The temperature of each individual battery 9 is collected by the thermistor 8 and the data is transmitted to the monitoring and control module through the temperature measuring cable 12. The monitoring and control module performs a preliminary analysis of the temperature collected by the thermistor 8. If the temperature is higher than a certain value, the cooling fan 10 will be activated. This is the first start-up logic.

[0051] In a preferred embodiment, the AC cooling module includes an AC cooling fan 6, a small compressor, a second heat dissipation mesh 5, a temperature and humidity sensor 4, and a second temperature acquisition module. Similarly, the second temperature acquisition module also consists of a thermistor 8 and a temperature measuring cable 12. The temperature and humidity sensor 4 is located in the area of ​​high heat exchange, outside the heat dissipation mesh of the battery compartment 3. Because cold and hot air circulate frequently in this area, the temperature and humidity sensor 4 closely monitors the temperature and humidity. If the humidity shows an upward trend, it records the information and issues an alert, reducing the cold air velocity and increasing the dehumidification control index. A drain outlet 7 is provided on the outside of the casing, from which condensate is discharged, preventing excessive humidity in the battery compartment 3 from causing insulation degradation of the battery, wire connections, battery monitoring system circuit board, and temperature and humidity sensor 4.

[0052] The monitoring and control module analyzes the temperature information inside the casing, the temperature and humidity information next to the battery compartment 3, and the ambient temperature and humidity information. It controls the AC cooling fan 6 and the small compressor to discharge heat through the second heat dissipation net 5, so as to control the temperature and humidity inside the box-type air conditioner casing 1 to meet the working conditions.

[0053] In a preferred embodiment, the inside of the box-type air conditioner faces the front of the battery module matrix cooling fan 10, which can effectively exchange heat and carry the heat out of the compartment through the box-type air conditioner, thereby improving the overall heat dissipation efficiency of the battery compartment 3.

[0054] In a preferred embodiment, the cooling device may also be equipped with a smoke monitoring module, which is used to send smoke information to the monitoring and control module after smoke is generated in the battery compartment 3.

[0055] The monitoring and control module, along with each heat dissipation module, smoke monitoring module, and battery management unit, connects to the battery compartment 3 monitoring system via RS-485 communication. This communication method is simple, reliable, and facilitates installation, commissioning, and subsequent maintenance.

[0056] The monitoring and control module compares, verifies, and judges the collected voltage, current, and temperature data against historical data. If the voltage of a single battery cell suddenly drops, or its temperature drops to 0°C, or its voltage and temperature deviate significantly from those of other single batteries, the system automatically identifies this and retrieves the temperature and voltage data of surrounding single batteries and the data from the entire battery pack for comparison to verify if the data is abnormal. That is, when a battery's temperature is abnormal, it may be due to an error in the thermistor's temperature readings or an error in the data analysis by the acquisition unit. In this case, historical temperature data, voltage and current data, and temperature data of adjacent batteries are compared. For battery module temperature data verification, if the difference is particularly large, for example, 25°C - 0°C > 20°C, and the ambient temperature is 25°C, a single battery cell cannot be at 0°C. The system temperature detection verification is abnormal, and an error signal is output. The system continues to check for abnormal voltage fluctuations. If there are no abnormal fluctuations, it is identified as a false signal, and no alarm is issued. If continuous data verification shows no abnormalities, it is generally determined to be a false signal. This abnormal data will be recorded in the historical data for future temperature data verification. For example, if the same battery module still triggers an abnormal temperature alarm, the system will automatically retrieve the historical abnormal data for verification, thereby determining that the battery heat dissipation module or thermistor 8 may be faulty and needs to be replaced.

[0057] If the temperature detected by each temperature acquisition module exceeds the set value, and the smoke monitoring module at the top of the compartment detects smoke, accompanied by sudden voltage and current changes in individual battery modules (e.g., voltage suddenly drops to 0, thermistor 8 detects no data or displays an open circuit, infinite resistance, or sudden changes in the output current of this battery pack), a battery fire can be identified. If a battery fire signal is identified, it should be further determined whether the temperature inside the compartment is rising rapidly and continuously within a short period. If a fire signal is detected but the temperature collected by thermistors 8 installed in all corners of the compartment is normal, the system may misjudge and not issue a false alarm. If a smoke alarm signal is detected, it should be further determined whether there are abnormal fluctuations in voltage and current to comprehensively assess whether a fire has actually occurred in battery compartment 3. When a fire signal is detected, there may be battery explosions or short circuits in the wires. By comparing the voltage of all individual batteries, if all battery voltages and output currents are normal, an error judgment signal is output.

[0058] In a preferred embodiment, the cooling device is further equipped with an explosion-proof ventilation module. The ventilation system is configured to ventilate at set times based on the temperature inside and outside the cabin. During long-term charging and discharging, the battery will produce flammable and explosive hydrogen gas. When the outside temperature To-Ti is less than the set value, it indicates that the outside temperature will not be too high. Therefore, starting the fan will not raise the cabin temperature too much, and the gas can be exhausted through the explosion-proof ventilation port 2 on the casing. Furthermore, after the fan is started, the air conditioning system will adjust the temperature once based on any sudden temperature changes to ensure the cabin temperature remains normal.

[0059] The cooling device provided in the above embodiments has advantages such as high stability, low installation cost, low maintenance cost, simple structure, and simple debugging.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electrochemical energy storage station battery compartment cooling device, characterized by, The application relates to a battery cabin cooling device of an electrochemical energy storage station. The battery cabin cooling device comprises a box-type air conditioner shell, a battery heat dissipation module, an alternating heat dissipation module and a monitoring control module. The battery cabin cooling device further comprises a battery management unit. The battery cabin cooling device further comprises a smoke monitoring module. The smoke monitoring module is connected with the monitoring control module and is used for sending smoke information to the monitoring control module when smoke is generated in the battery cabin. The monitoring control module further judges the working conditions of the batteries in the battery cabin according to various information and sends an alarm signal when the working conditions are abnormal. The battery cabin cooling device further comprises an 8*15*15 combined battery module array. The 8*15*15 combined battery module array comprises eight battery columns. Each battery column comprises 15 sub-battery modules. Each sub-battery module comprises 15 single batteries. The second heat dissipation net on the box-type air conditioner shell is arranged opposite to the first heat dissipation net on the battery cabin. The smoke monitoring module is connected with the monitoring control module and is used for sending smoke information to the monitoring control module when smoke is generated in the battery cabin. The monitoring control module further judges the working conditions of the batteries in the battery cabin according to various information and sends an alarm signal when the working conditions are abnormal. ​ 2. The electrochemical energy storage station battery compartment cooling apparatus of claim 1, wherein, ​ ​ ​ ​ 4. The electrochemical energy storage station battery compartment cooling apparatus of claim 1, wherein, ​ ​ ​ 5. The electrochemical energy storage station battery compartment cooling apparatus of claim 4, wherein, ​ 6. The electrochemical energy storage station battery compartment cooling apparatus of claim 5, wherein, The monitoring control module judges the working conditions of each section of the batteries in the battery cabin according to various types of information, specifically: The monitoring control module judges whether the voltage or current of each section of the batteries in the battery cabin is suddenly changed or whether the temperature difference between each section of the batteries exceeds a set threshold value, if the sudden change or the set threshold value is exceeded, whether the smoke information is generated at this time, if not, a battery cabin working abnormally signal is generated, if yes, whether the temperature inside the box type air conditioner shell rises, if yes, a battery fire alarm signal is generated, if not, an error judgment signal is generated.

7. The electrochemical energy storage station battery compartment cooling apparatus of claim 1, wherein, Also includes: An explosion-proof exhaust module; The explosion-proof exhaust module is arranged in the box type air conditioner shell, and is used for exhausting the gas in the box type air conditioner shell at a time.

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