Mobile energy storage device

Abstract

The invention discloses a mobile energy storage device which comprises a battery box, a temperature control management system, a fire extinguishing system, a battery management system, a high-voltage control system, an in-cabin energy management system and a power supply system. According to the invention, the temperature control management system is arranged in the energy storage device, so that the temperature of equipment in the battery box is monitored in real time, and the temperature of the equipment is specifically adjusted to different degrees according to the monitored temperature of the equipment, so that the temperature of the equipment is in a safe range; a fire extinguishing system is arranged, so that fire point detection on each component in the battery box is realized, and alarm information of different degrees is reported according to different temperatures and gas concentrations of fire points; in addition, by arranging the battery management system, each data of the battery unit is monitored in real time, and then the battery unit is managed according to each monitored data, so that the use of the battery unit is better protected, and the service life of the battery unit is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of electricity use in the construction industry, and in particular relates to a mobile energy storage device. Background Art

[0002] With the rapid development of my country's new energy industry and the deepening of the energy revolution, energy storage technology, as the core support for the development of the future energy system, has gradually become the focus of widespread attention. Energy storage technology will become a key technology that affects the future energy structure, and it is of great significance to ensure the safe, stable and efficient operation of its access to the energy system, improve the comprehensive utilization efficiency of energy, promote the development of the new energy industry, and promote the strategic transformation of energy.

[0003] Electricity consumption on construction sites usually shows obvious differences in peak and valley prices. Using new energy to achieve peak-valley arbitrage is an effective way to reduce electricity costs. By deploying mobile energy storage systems, construction sites can charge during valley periods when electricity prices are lower, and release stored energy during peak periods when electricity prices are higher, effectively reducing expenses.

[0004] Therefore, it is an urgent problem to be solved how the mobile energy storage system can optimize energy storage control, distributed power output and load switching strategies to enable the system to safely, economically and efficiently achieve energy management in different application scenarios and operating modes. Summary of the invention

[0005] The present invention provides a mobile energy storage device, which can effectively solve the above problems.

[0006] The present invention is achieved in that:

[0007] A mobile energy storage device, comprising:

[0008] A battery box, wherein a plurality of battery clusters formed by connecting a plurality of battery cells in series are arranged in the battery box;

[0009] A temperature control management system, which is used to monitor and adjust the temperature of the equipment in the battery box;

[0010] A fire fighting system for detecting fire points and responding to fires;

[0011] A battery management system, which is used to monitor, manage and protect battery cells;

[0012] A high voltage control system, the high voltage control system is used to manage and monitor the high voltage power distribution of the energy storage device;

[0013] An in-cabin energy management system for monitoring the internal environment of the battery cells and battery boxes;

[0014] A power supply system is used to provide power to the energy storage device.

[0015] As a further improvement, the battery management system adopts a two-level architecture, including BMU and BCU, wherein the BMU is a first-level slave control, responsible for collecting voltage and temperature information of battery cells, and estimates by inputting the collected parameter information into a preset algorithm, and finally performs thermal management and fault alarm according to the estimation results; the BCU is a second-level master control and is controlled by the BMU, responsible for the management of each battery cluster and calculates the charge capacity of each battery cluster, the charge and discharge power of the battery cluster, the health index of the battery cluster and the insulation performance of the battery cluster by collecting the discharge current of the battery cluster, and then estimates by inputting the collected parameter information into a preset algorithm, and estimates the capacity and charge state of the battery cluster based on the estimation results, and finally performs balancing management and charge and discharge management based on the estimation results.

[0016] As a further improvement, the fire protection system has an independent power supply and a fault alarm indicator light, wherein the fault alarm indicator light is used to display whether the fire protection system is operating normally, and the fire protection system includes a composite fire detector, which is used to monitor and analyze the thermal runaway characteristics of the battery box. The composite fire detector is installed inside the battery cluster in the battery box.

[0017] As a further improvement, the fire protection system also includes a cabinet-type energy storage non-pressure storage fire extinguishing device and a package-level perfluorohexanone nozzle. The cabinet-type energy storage non-pressure storage fire extinguishing device is connected to the composite fire detector via a CAN bus communication method. A non-pressure storage fire extinguishing agent bottle group is arranged in the cabinet-type energy storage non-pressure storage fire extinguishing device. The non-pressure storage fire extinguishing agent bottle group can realize the spraying of fire extinguishing agent through the package-level perfluorohexanone nozzle. The cabinet-type energy storage non-pressure storage fire extinguishing device is installed on the top of the battery rack in the energy storage cabinet, and the package-level perfluorohexanone nozzle is installed in the reserved installation hole of the battery cluster.

[0018] As a further improvement, the temperature control management system includes a liquid cooling plate, a liquid cooling unit, a liquid cooling pipe and a liquid cooling unit controller. The liquid cooling plate is arranged at the bottom of the battery box, and the liquid cooling pipe is distributed from the liquid cooling unit to each battery cluster. The liquid cooling unit is used to cool the battery cluster, and the liquid cooling unit controller is used to switch the mode and switch of the liquid cooling unit according to the actual temperature feedback from the battery cluster.

[0019] As a further improvement, the high-voltage control system includes a high-voltage converter and a control unit. The control unit can dynamically adjust the high-voltage converter according to the high-voltage current and voltage monitored in real time. The high-voltage control system can also intelligently adjust the charging and discharging process of the battery cluster by integrating with the battery management system and the in-cabin energy management system.

[0020] As a further improvement, when the composite fire detector detects that the carbon monoxide concentration in the battery box is greater than 190ppm and less than 890ppm, the composite fire detector increases the sampling frequency and focuses on monitoring the battery cluster with excessively high carbon monoxide concentration, and the controller uploads a first-level alarm message via RS485; when the composite fire detector detects that the carbon monoxide concentration in the battery box is greater than or equal to 890ppm and less than 1500ppm or the temperature rise rate in the battery box is greater than or equal to 1°C / s and lasts for 10 seconds, the controller uploads a second-level alarm message via RS485; when the composite fire detector detects that the carbon monoxide concentration in the battery box is greater than or equal to 1500ppm and the temperature in the battery box is greater than or equal to 65°C or the temperature rise rate in the battery box is greater than or equal to 1°C / s and lasts for 10 seconds, the controller opens the non-pressure storage fire extinguishing agent bottle group, and the fire extinguishing agent suppresses the battery cluster through the package-level perfluorohexanone nozzle, and the controller uploads a third-level alarm message via RS485.

[0021] As a further improvement, the preset algorithm of the battery management system includes:

[0022] A) SOC (State Of Charge), through the ampere-hour integration method and the extended Kalman filter algorithm, combined with the algorithm results to correct the control strategy, such as open circuit voltage correction, battery full correction, battery charging end correction and battery capacity correction at different temperatures and SOH (State Of Hea l th);

[0023] B) SOH (State Of Health) is used to characterize the current health status of the battery, which is a value between 0-100%. If it is lower than 80%, the battery cannot be used anymore.

[0024] C) SOE (State Of Energy) algorithm uses a multi-analysis algorithm to obtain the ratio of the remaining energy to the maximum available energy in the current state;

[0025] D) SOP (State Of Power) algorithm, through temperature and SOC algorithm data, obtains the current available charge and discharge power of the battery, and further analyzes the release of battery capacity and protects battery performance.

[0026] As a further improvement, the cabin energy management system includes:

[0027] Summary interface: the default interface entered after the in-cabin energy management system is started. The summary interface can display the key parameters and power generation of the energy storage system in operation, and there are also charge, discharge and stop buttons on the summary interface;

[0028] The battery box interface can view multiple groups of battery cell voltage, battery cell temperature data, etc. in real time;

[0029] Converter interface, where detailed parameters of the battery side and high voltage side can be viewed;

[0030] Temperature control interface, which can view the maximum temperature of the battery cluster in real time, and can set the cooling or heating target temperature, view the real-time pressure of the liquid outlet or liquid inlet, and view the real-time temperature of the liquid outlet or liquid inlet;

[0031] Fire protection system interface, which can view the current temperature and carbon monoxide concentration of each battery cluster in real time;

[0032] The login interface is used to log in by selecting a user and entering a corresponding password, and the parameter adjustment function in the cabin energy management system is restricted according to different logged-in users.

[0033] As a further improvement, the power supply system includes a high-voltage DCDC to 24V module and a backup lead-acid battery pack. The high-voltage DCDC to 24V module can provide power for each system in the energy storage device. The backup lead-acid battery pack includes two 12V30Ah lead-acid batteries connected in series. In an emergency situation where the DC power supply system has no output, the backup lead-acid battery pack can provide power for each system in the energy storage device.

[0034] The beneficial effects of the present invention are as follows: by arranging a temperature control management system in the energy storage device, the temperature of the equipment in the battery box is monitored in real time, and the temperature of the equipment is adjusted to different degrees according to the monitored temperature of the equipment, so that the temperature of the equipment is within a safe range; by arranging a fire protection system, the fire point detection of each component in the battery box is realized, and according to the temperature and gas concentration of the fire point, different degrees of alarm information are reported, and fire extinguishing treatment is carried out in a targeted manner according to different alarm information; by arranging a high-voltage control system, the voltage of each component in the battery box is monitored, and voltage instability or Adaptive adjustment is made to the voltage being insufficient, i.e. the voltage of each component in the battery box is distributed, so that each component in the battery box can work normally. By setting up an in-cabin energy management system, the internal environment of the battery unit and the battery box can be reflected on the touch control screen in real time, which is convenient for the user to observe, and the preset data of each battery unit or battery box can be manually adjusted through the touch control screen. By setting up a battery management system, real-time monitoring of each data of the battery unit is realized, and then the battery unit is managed according to the data obtained from the monitoring, so as to better protect the use of the battery unit and increase the service life of the battery unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a schematic diagram of the overall structural frame connection of a mobile energy storage device of the present invention;

[0037] Figure 2 It is the electrical schematic diagram of the liquid cooling unit in the present invention;

[0038] Figure 3 is a schematic interface diagram of the EMS in the present invention;

[0039] Figure 4 It is a battery box interface diagram of the EMS in the present invention;

[0040] Figure 5 is a converter interface diagram of the EMS in the present invention;

[0041] Figure 6 It is a temperature control interface diagram of the EMS in the present invention;

[0042] Figure 7 It is a fire protection system interface diagram of the EMS in the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, the orientations or positional relationships indicated by terms such as "upper", "lower", "above", "both ends", etc. are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] Reference Figure 1-7 As shown, this embodiment provides a mobile energy storage device, including:

[0046] A battery box, wherein a plurality of battery clusters formed by connecting a plurality of battery cells in series are arranged in the battery box;

[0047] A temperature control management system, which is used to monitor and adjust the temperature of the equipment in the battery box;

[0048] A fire fighting system for detecting fire points and responding to fires;

[0049] A battery management system, which is used to monitor, manage and protect battery cells;

[0050] A high voltage control system, the high voltage control system is used to manage and monitor the high voltage power distribution of the energy storage device;

[0051] An in-cabin energy management system for monitoring the internal environment of the battery cells and battery boxes;

[0052] A power supply system is used to provide power to the energy storage device.

[0053] By setting up a temperature control management system in the energy storage device, the temperature of the equipment in the battery box is monitored in real time, and the temperature of the equipment is adjusted to different degrees according to the monitored equipment temperature, so that the equipment temperature is within a safe range; by setting up a fire protection system, the fire point detection of each component in the battery box is realized, and according to the temperature and gas concentration of the fire point, different degrees of alarm information are reported, and fire extinguishing treatment is carried out according to different alarm information; by setting up a high-voltage control system, the voltage of each component in the battery box is monitored, and adaptive adjustment is made according to voltage instability or insufficient voltage in different situations, that is, the voltage of each component in the battery box is distributed, so that each component in the battery box can work normally; by setting up an in-cabin energy management system, the internal environment of the battery unit and the battery box is reflected in real time to the touch control screen, which is convenient for users to observe, and the preset data of each battery unit or battery box can be manually adjusted through the touch control screen; by setting up a battery management system, the various data of the battery unit is monitored in real time, and then the battery unit is managed according to the various data obtained by monitoring, so as to better protect the use of the battery unit and improve the service life of the battery unit.

[0054] Furthermore, the battery management system adopts a two-level architecture, including BMU and BCU, wherein the BMU serves as a first-level slave control, responsible for collecting voltage and temperature information of battery cells, and estimates by inputting the collected parameter information into a preset algorithm, and finally performs thermal management and fault alarm according to the estimation results; the BCU serves as a second-level master control and is controlled by the BMU, responsible for the management of each battery cluster and calculating the charge capacity of each battery cluster, the charge and discharge power of the battery cluster, the health index of the battery cluster, and the insulation performance of the battery cluster by collecting the discharge current of the battery cluster, and then estimates by inputting the collected parameter information into a preset algorithm, and estimates the capacity and charge state of the battery cluster according to the estimation results, and finally performs balancing management and charge and discharge management according to the estimation results.

[0055] The benefit of balancing management is that in a battery pack, due to the consistency differences of battery cells (including capacity, internal resistance, self-discharge rate, etc.), as the charge and discharge cycle proceeds, the SOC (state of charge) of each battery cell will gradually differ, and this difference will affect the overall performance, life and safety of the battery cluster. Therefore, balancing management is to adjust according to the SOC differences of each battery cell to ensure that the SOC of each battery cell can reduce the difference as much as possible, thereby improving the overall performance and life of the battery cluster. At the same time, through thermal balancing management, the battery pack can work within a certain temperature and range, effectively ensuring the temperature consistency of the battery and achieving long-term operation of the battery system.

[0056] The purpose of balancing management is to balance the power of each battery cell in the battery cluster. The prerequisites for balancing management are: the battery management system is powered on and in normal working mode, the minimum and maximum voltages of the battery cells are in the effective value range of [2.45, 3.75] V, and the minimum and maximum temperatures of the battery cells are in the effective value range of [0, 50] ° C. Only when the above conditions are met at the same time can balancing management be entered. If any one of the conditions is not met, balancing will be exited.

[0057] In this embodiment, the balancing management includes two control algorithms:

[0058] Threshold control method: Set a SOC or voltage threshold, and when the SOC or voltage difference between battery cells exceeds this threshold, start balancing. For example, set the voltage difference threshold to 0.05V, and when the voltage difference between two battery cells is greater than 0.05V, the balancing management system starts working.

[0059] Fuzzy control method: Consider multiple factors, such as battery temperature, SOC change rate, etc. to comprehensively determine whether to start balancing and the intensity of balancing, so as to manage battery balancing more flexibly and accurately.

[0060] In this embodiment, two control algorithms can be adaptively selected according to actual working conditions.

[0061] Charge and discharge management uses components such as inductors or transformers to transfer energy from battery cells with high power to battery cells with low power, ensuring that the remaining power of each battery cell is almost the same, thereby better charging the battery cluster as a whole and avoiding overcharging or over-discharging of a single battery cell.

[0062] Furthermore, the preset algorithm of the battery management system includes:

[0063] A) SOC (State Of Charge), through the ampere-hour integration method and the extended Kalman filter algorithm, combined with the algorithm results to correct the control strategy, such as open circuit voltage correction, battery full correction, battery charging end correction and battery capacity correction at different temperatures and SOH (State Of Hea l th);

[0064] B) SOH (State Of Health) is used to characterize the current health status of the battery, which is a value between 0-100%. If it is lower than 80%, the battery cannot be used anymore.

[0065] C) SOE (State Of Energy) algorithm uses a multi-analysis algorithm to obtain the ratio of the remaining energy to the maximum available energy in the current state;

[0066] D) SOP (State Of Power) algorithm, through temperature and SOC algorithm data, obtains the current available charge and discharge power of the battery, and further analyzes the release of battery capacity and protects battery performance.

[0067] Battery SOC estimation: The remaining charge of the battery is expressed as a percentage of the battery's capacity.

[0068] Typical algorithms for SOC estimation include the open circuit voltage method (OCV method), the ampere-hour integration method, the impedance method, the Kalman filter method, and the neural network method. Most BMSs use the weighted ampere-hour integration method, which adds open circuit voltage, rated capacity at different temperatures, and charge and discharge efficiency at different currents and other cell parameters to the ampere-hour integration method to correct the SOC. Artificial intelligence SOC is based on the weighted ampere-hour integration method, and collects real-time data of the battery system (cell voltage, current, temperature, etc.) to calculate the real-time OCV, thereby realizing dynamic OCV correction of SOC.

[0069] Battery SOH estimation: The percentage of the number of times the battery has been fully charged to the number of available charges in the battery life cycle.

[0070] Battery SOP estimation: The battery power state is usually expressed by short-term peak power. The temperature and SOC are used to check the simulated power point (MAP) to obtain the current available charge and discharge power of the battery.

[0071] By adopting the composite battery model algorithm (ie the above-mentioned multiple preset algorithms), the internal state of the battery can be accurately obtained, and the error between the actual and calculated results can be guaranteed not to exceed 5%.

[0072] Furthermore, the fire protection system has an independent power supply and a fault alarm indicator light, wherein the fault alarm indicator light is used to display whether the fire protection system is operating normally, and the fire protection system includes a composite fire detector, wherein the composite fire detector is used to monitor and analyze the thermal runaway characteristic quantities of the battery box, and the composite fire detector is installed inside the battery cluster in the battery box.

[0073] Furthermore, the fire protection system also includes a cabinet-type energy storage non-pressure storage fire extinguishing device and a package-level perfluorohexanone nozzle. The cabinet-type energy storage non-pressure storage fire extinguishing device is connected to the composite fire detector via a CAN bus communication method. A non-pressure storage fire extinguishing agent bottle group is arranged in the cabinet-type energy storage non-pressure storage fire extinguishing device. The non-pressure storage fire extinguishing agent bottle group can realize the spraying of fire extinguishing agent through the package-level perfluorohexanone nozzle. The cabinet-type energy storage non-pressure storage fire extinguishing device is installed on the top of the battery rack in the energy storage cabinet, and the package-level perfluorohexanone nozzle is installed in the reserved installation hole of the battery cluster.

[0074] In this embodiment, the energy storage system is used as a protection zone, and two levels of protection are set up - package-level protection and cabinet-level protection; the package-level protection uses a two-in-one composite detector as a detection device placed in each battery cluster to detect the concentration and temperature of combustible gas in the battery unit, and a package-level nozzle is set on each battery cluster. The two-in-one composite detector is electrically connected to the cabinet-type energy storage non-storage pressure fire extinguishing device. The outlet of the cabinet-type energy storage non-storage pressure fire extinguishing device is through a high-pressure hose. Once a battery cluster has thermal runaway, the two-in-one detector transmits an alarm signal to the cabinet-type energy storage non-storage pressure fire extinguishing device, and the cabinet-type energy storage non-storage pressure fire extinguishing device is activated, and the perfluorohexanone fire extinguishing agent acts directly on the runaway battery cluster through the quick-pipe line and the package-level nozzle.

[0075] The entire cabinet-level protection adopts passive protection, which is combined with a non-pressure storage perfluorohexanone fire extinguishing device and a temperature-sensitive magnetic power generation component. Once the temperature inside the cabinet exceeds the starting temperature of the temperature-sensitive magnetic power generation, the temperature-sensitive magnetic power generation component will emit a pulse current to start the non-pressure storage perfluorohexanone fire extinguishing device in the cabinet, fully flood the energy storage cabinet, and feedback the starting signal to the cabinet-type energy storage non-pressure storage fire extinguishing device.

[0076] Advantages of fire protection system:

[0077] 1) Using high-sensitivity sensors, the temperature and CO concentration in the energy storage cabinet can be detected before a fire occurs.

[0078] 2) Collect and monitor the air environment in real time and report any abnormalities in a timely manner.

[0079] 3) It adopts 485 bus connection mode, can communicate directly with BMS, and the wiring is convenient, and multiple alarms can be flexibly mounted.

[0080] 4) Use multi-level warning to accurately monitor carbon monoxide in the battery pack of the energy storage cabinet to prevent false alarms and missed alarms.

[0081] 5) Integrated design of fire extinguishing and control, easy to install and saves space.

[0082] 6) The use of perfluorohexanone fire extinguishing agent has a significant cooling effect and does not damage live equipment and precision equipment (it is volatile without residue, has strong insulation and is non-conductive).

[0083] Furthermore, the temperature control management system includes a liquid cooling plate, a liquid cooling unit, a liquid cooling pipe and a liquid cooling unit controller. The liquid cooling plate is arranged at the bottom of the battery box. The liquid cooling pipe is distributed from the liquid cooling unit to each battery cluster. The liquid cooling unit is used to cool the battery cluster. The liquid cooling unit controller is used to switch the mode and switch of the liquid cooling unit according to the actual temperature feedback from the battery cluster.

[0084] In this embodiment, the temperature control management system includes three modes:

[0085] In cooling mode, the compressor is turned on, and the high-temperature and high-pressure refrigerant is discharged from the compressor. After entering the condenser for condensation and heat exchange, it is throttled and depressurized and cooled through the TXV, and then enters the plate evaporator for evaporation and heat exchange with the antifreeze water. The refrigerant absorbs heat and evaporates in the plate evaporator and then flows back to the compressor intake port, completing a refrigeration cycle. At this time, the water pump in the water circuit is turned on, and the antifreeze water cools in the plate evaporator and then enters the power battery cluster to cool the battery and take out the heat, thereby achieving the purpose of cooling the battery. This mode is suitable for situations where the load is relatively large during battery charging and discharging.

[0086] In the self-circulation mode, the compressor is turned off and the water pump starts running, so that the antifreeze water circulates repeatedly in the power battery cluster to remove the heat in the battery cluster. This mode is suitable for situations where the load is relatively small when the battery is charged and discharged.

[0087] In shutdown mode, all components of the system are in a turned-off state. At this time, the battery does not require a power battery thermal management unit and can operate within a suitable temperature range.

[0088] Furthermore, the high-voltage control system includes a high-voltage converter and a control unit. The control unit can dynamically adjust the high-voltage converter according to the high-voltage current and voltage monitored in real time. The high-voltage control system can also intelligently adjust the charging and discharging process of the battery cluster by integrating with the battery management system and the in-cabin energy management system.

[0089] The liquid cooling pipes from the water-cooling unit to a single battery cluster have different inner diameters depending on the distribution of flow levels, and the liquid cooling pipes are made of PE or PA12-T I E-PP material.

[0090] Furthermore, when the composite fire detector detects that the carbon monoxide concentration in the battery box is greater than 190ppm and less than 890ppm, the composite fire detector increases the sampling frequency and focuses on monitoring the battery cluster with excessively high carbon monoxide concentration, and the controller uploads a first-level alarm message via RS485; when the composite fire detector detects that the carbon monoxide concentration in the battery box is greater than or equal to 890ppm and less than 1500ppm or the temperature rise rate in the battery box is greater than or equal to 1°C / s and lasts for 10 seconds, the controller uploads a second-level alarm message via RS485; when the composite fire detector detects that the carbon monoxide concentration in the battery box is greater than or equal to 1500ppm and the temperature in the battery box is greater than or equal to 65°C or the temperature rise rate in the battery box is greater than or equal to 1°C / s and lasts for 10 seconds, the controller opens the non-pressure storage fire extinguishing agent bottle group, and the fire extinguishing agent suppresses the battery cluster through the package-level perfluorohexanone nozzle, and the controller uploads a third-level alarm message via RS485.

[0091] When the detection device detects objects and gas exceeding the standard value of the first-level alarm information, the second-level alarm information or the third-level alarm information, the detection device uploads the information to the fire system linkage controller through RS485. The fire system linkage controller uploads the first-level alarm information, the second-level alarm information or the third-level alarm information to the energy storage system EMS in real time. The EMS display terminal will display the uploaded alarm information in real time, and then guide the workers to take corresponding measures for different alarm information.

[0092] Furthermore, the in-cabin energy management system includes:

[0093] Summary interface: the default interface entered after the in-cabin energy management system is started. The summary interface can display the key parameters and power generation of the energy storage system in operation, and there are also charge, discharge and stop buttons on the summary interface;

[0094] The battery box interface can view multiple groups of battery cell voltage, battery cell temperature data, etc. in real time;

[0095] Converter interface, where detailed parameters of the battery side and high voltage side can be viewed;

[0096] Temperature control interface, which can view the maximum temperature of the battery cluster in real time, and can set the cooling or heating target temperature, view the real-time pressure of the liquid outlet or liquid inlet, and view the real-time temperature of the liquid outlet or liquid inlet;

[0097] Fire protection system interface, which can view the current temperature and carbon monoxide concentration of each battery cluster in real time;

[0098] The login interface is used to log in by selecting a user and entering a corresponding password, and the parameter adjustment function in the cabin energy management system is restricted according to different logged-in users.

[0099] Advantages of in-cabin energy management system:

[0100] (1) The energy storage EMS comprehensively monitors the real-time operation information and alarm information of the energy storage battery, and performs multi-dimensional statistics and analysis on the energy storage. Through the configurable interface, the system can automatically control the energy storage system based on the preset curve, and automatically implement protection measures according to the configuration parameters, achieving comprehensive control of the energy storage system.

[0101] (2) The system is equipped with efficient graphic configuration, template management, database management and algorithm configuration tools, which are simple and easy to use, significantly shortening the project implementation cycle.

[0102] (3) Using a unique energy storage optimization algorithm, the system can maintain optimized operation even when the battery is in poor condition, ensuring strong system stability.

[0103] (4) The system has cross-platform operation characteristics and supports Windows, Linux and domestic operating system platforms.

[0104] (5) The system design adopts advanced solutions that are in line with future development trends, demonstrating the system's advancement and foresight.

[0105] (6) In terms of security, the system has built a complete security architecture to effectively avoid security vulnerabilities.

[0106] (7) The system exhibits good scalability in terms of capacity, communication capability, and processing capability, facilitating product upgrades, replacements, and functional expansion. It adopts advanced technologies and methods to provide open standard interfaces for third-party applications, effectively protecting existing investments while providing cost-effective comprehensive performance.

[0107] (8) The system is designed to meet the requirements of 24-hour operation and 365-day continuous operation, and all equipment has high reliability and excellent performance.

[0108] (9) The system attaches great importance to security and confidentiality, and effectively prevents illegal intrusion through means such as hierarchical protection, data storage permission control, and network security isolation.

[0109] System administrators can easily perform maintenance and management, and the overall operation of the system will not be affected during maintenance. All document records must be complete, accurate and consistent to ensure the accuracy of physical connections and be truly recorded in the corresponding documents to facilitate the smooth implementation of user maintenance work in the future.

[0110] Furthermore, the power supply system includes a high-voltage DCDC to 24V module and a backup lead-acid battery pack. The high-voltage DCDC to 24V module can provide power for each system in the energy storage device. The backup lead-acid battery pack includes two 12V30Ah lead-acid batteries connected in series. In an emergency situation where the DC power supply system has no output, the backup lead-acid battery pack can provide power for each system in the energy storage device.

[0111] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mobile energy storage device, characterized in that: include: A battery box, wherein a plurality of battery clusters formed by connecting a plurality of battery cells in series are arranged in the battery box; A temperature control management system, which is used to monitor and adjust the temperature of the equipment in the battery box; A fire fighting system for detecting fire points and responding to fires; A battery management system, which is used to monitor, manage and protect battery cells; A high voltage control system, the high voltage control system is used to manage and monitor the high voltage power distribution of the energy storage device; An in-cabin energy management system for monitoring the internal environment of the battery cells and battery boxes; A power supply system is used to provide power to the energy storage device.

2. The mobile energy storage device according to claim 1, characterized in that: The battery management system adopts a two-level architecture, including BMU and BCU, wherein the BMU is a first-level slave control, responsible for collecting voltage and temperature information of battery cells, and estimates by inputting the collected parameter information into a preset algorithm, and finally performs thermal management and fault alarm according to the estimation results; the BCU is a second-level master control and is controlled by the BMU, responsible for the management of each battery cluster and calculates the charge capacity of each battery cluster, the charge and discharge power of the battery cluster, the health index of the battery cluster and the insulation performance of the battery cluster by collecting the discharge current of the battery cluster, and then estimates by inputting the collected parameter information into a preset algorithm, and estimates the capacity and charge state of the battery cluster according to the estimation results, and finally performs balancing management and charge and discharge management according to the estimation results.

3. The mobile energy storage device according to claim 1, characterized in that: The fire protection system has an independent power supply and a fault alarm indicator light, wherein the fault alarm indicator light is used to display whether the fire protection system is operating normally, and the fire protection system includes a composite fire detector, wherein the composite fire detector is used to monitor and analyze the thermal runaway characteristic quantities of the battery box, and the composite fire detector is installed inside the battery cluster in the battery box.

4. The mobile energy storage device according to claim 3, characterized in that: The fire protection system also includes a cabinet-type energy storage non-pressure storage fire extinguishing device and a package-level perfluorohexanone nozzle. The cabinet-type energy storage non-pressure storage fire extinguishing device is connected to the composite fire detector via a CAN bus communication method. A non-pressure storage fire extinguishing agent bottle group is arranged in the cabinet-type energy storage non-pressure storage fire extinguishing device. The non-pressure storage fire extinguishing agent bottle group can realize the spraying of the fire extinguishing agent through the package-level perfluorohexanone nozzle. The cabinet-type energy storage non-pressure storage fire extinguishing device is installed on the top of the battery rack in the energy storage cabinet, and the package-level perfluorohexanone nozzle is installed in the reserved installation hole of the battery cluster.

5. The mobile energy storage device according to claim 1, characterized in that: The temperature control management system includes a liquid cooling plate, a liquid cooling unit, a liquid cooling pipe and a liquid cooling unit controller. The liquid cooling plate is arranged at the bottom of the battery box. The liquid cooling pipe is distributed from the liquid cooling unit to each battery cluster. The liquid cooling unit is used to cool the battery cluster. The liquid cooling unit controller is used to switch the mode and switch of the liquid cooling unit according to the actual temperature fed back by the battery cluster.

6. The mobile energy storage device according to claim 1, characterized in that: The high-voltage control system includes a high-voltage converter and a control unit. The control unit can dynamically adjust the high-voltage converter according to the high-voltage current and voltage monitored in real time. The high-voltage control system can also intelligently adjust the charging and discharging process of the battery cluster by integrating with the battery management system and the in-cabin energy management system.

7. The mobile energy storage device according to claim 3, characterized in that: When the composite fire detector detects that the carbon monoxide concentration in the battery box is greater than 190ppm and less than 890ppm, the composite fire detector increases the sampling frequency and focuses on monitoring the battery cluster with excessively high carbon monoxide concentration, and the controller uploads a first-level alarm message via RS485; when the composite fire detector detects that the carbon monoxide concentration in the battery box is greater than or equal to 890ppm and less than 1500ppm or the temperature rise rate in the battery box is greater than or equal to 1°C / s and lasts for 10 seconds, the controller uploads a second-level alarm message via RS485; when the composite fire detector detects that the carbon monoxide concentration in the battery box is greater than or equal to 1500ppm and the temperature in the battery box is greater than or equal to 65°C or the temperature rise rate in the battery box is greater than or equal to 1°C / s and lasts for 10 seconds, the controller opens the non-pressure storage fire extinguishing agent bottle group, and the fire extinguishing agent suppresses the battery cluster through the package-level perfluorohexanone nozzle, and the controller uploads a third-level alarm message via RS485.

8. The mobile energy storage device according to claim 2, characterized in that: The preset algorithm of the battery management system includes: A) SOC (State Of Charge), through the ampere-hour integration method and the extended Kalman filter algorithm, combined with the algorithm results to correct the control strategy, such as open circuit voltage correction, battery full correction, battery charging end correction, and battery capacity correction at different temperatures and SOH (State Of Health); B) SOH (State Of Health) is used to characterize the current health status of the battery, which is a value between 0-100%. If it is lower than 80%, the battery cannot be used anymore. C) SOE (State Of Energy) algorithm uses a multi-analysis algorithm to obtain the ratio of the remaining energy to the maximum available energy in the current state; D) SOP (State Of Power) algorithm, through temperature and SOC algorithm data, obtains the current available charge and discharge power of the battery, and further analyzes the release of battery capacity and protects battery performance.

9. The mobile energy storage device according to claim 1, characterized in that: The in-cabin energy management system comprises: Summary interface: the default interface entered after the in-cabin energy management system is started. The summary interface can display the key parameters and power generation of the energy storage system in operation, and there are also charge, discharge and stop buttons on the summary interface; The battery box interface can view multiple groups of battery cell voltage, battery cell temperature data, etc. in real time; Converter interface, where detailed parameters of the battery side and high voltage side can be viewed; Temperature control interface, which can view the maximum temperature of the battery cluster in real time, and can set the cooling or heating target temperature, view the real-time pressure of the liquid outlet or liquid inlet, and view the real-time temperature of the liquid outlet or liquid inlet; Fire protection system interface, which can view the current temperature and carbon monoxide concentration of each battery cluster in real time; The login interface is used to log in by selecting a user and entering a corresponding password, and the parameter adjustment function in the cabin energy management system is restricted according to different logged-in users.

10. The mobile energy storage device according to claim 1, characterized in that: The power supply system includes a high-voltage DCDC to 24V module and a backup lead-acid battery pack. The high-voltage DCDC to 24V module can provide power for each system in the energy storage device. The backup lead-acid battery pack includes two 12V30Ah lead-acid batteries connected in series. In an emergency situation where the DC power supply system has no output, the backup lead-acid battery pack can provide power for each system in the energy storage device.

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