Domain controller and energy storage system

Abstract

A domain controller (203) and an energy storage system (200) are provided. The domain controller (203) is used for the energy storage system (200), the energy storage system (200) comprises an energy storage unit (201) and a non-energy storage unit (202), the non-energy storage unit (202) comprises a thermal management unit and a fire fighting unit, and the non-energy storage unit (202) is used for assisting the energy storage unit (201); the domain controller (200) integrates a management module (2011) of the energy storage unit (201) and a management module (2021) of the non-energy storage unit (202) and is used for managing the non-energy storage unit (202) according to state information of the energy storage unit (201), the management strategy of the energy storage system (200) can be reasonably adjusted, and efficient energy-saving management of the energy storage system (200) is achieved.

Description

[0001] Cross Reference to Related Applications

[0002] This application claims priority to PCT Patent Application No. PCT / CN2022 / 100146 entitled “Domain Controller, Energy Storage System and Control Method of Energy Storage System” filed on June 21, 2022, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of energy storage, in particular to a domain controller and an energy storage system. BACKGROUND

[0004] Based on the background of national power reform and significant increase in renewable energy generation capacity, energy storage technology will play an important role in the five links of power system generation, transmission, transformation, distribution and use. Battery energy storage systems are increasingly widely used in the fields of new energy, smart grid, energy saving technology, etc.

[0005] With the development of the energy storage industry, the performance of battery energy storage systems such as work efficiency, safety performance and cycle life is the focus of attention. How to reasonably manage battery energy storage systems and improve the performance of battery energy storage systems is a problem to be solved at present. SUMMARY

[0006] The present application provides a domain controller and an energy storage system, which can reasonably adjust the management strategy of the energy storage system and realize efficient and energy-saving management of the energy storage system.

[0007] In a first aspect, a domain controller is provided for an energy storage system, the energy storage system including an energy storage unit and a non-energy storage unit, the non-energy storage unit including a thermal management unit and a fire extinguishing unit, the non-energy storage unit being used to assist the energy storage unit; the domain controller integrates a management module of the energy storage unit and a management module of the non-energy storage unit, and is used to manage the non-energy storage unit according to state information of the energy storage unit.

[0008] In the embodiments of the present application, the management module of the energy storage unit and the management module of the non-energy storage unit are integrated in the domain controller. Compared with the prior art in which the management module of the energy storage unit and the management module of the non-energy storage unit are distributed, the present application integrates the management module of the energy storage unit and the management module of the non-energy storage unit in the domain controller, so that the management module of the energy storage unit and the management module of the non-energy storage unit can be controlled by the domain controller, the information interaction between the management module of the energy storage unit and the management module of the non-energy storage unit is smooth and rapid, the system management efficiency is improved, and the information of the management module of the energy storage unit and the management module of the non-energy storage unit can be integrated and processed to avoid system resource waste caused by multiple information processing. In particular, after the management module of the fire unit and the management module of the energy storage unit are integrated in the domain controller, the fire unit can obtain the state information of the energy storage unit in time, and the working state is adjusted in time by the domain controller to ensure the safety of the energy storage system. In addition, the non-energy storage unit is managed according to the state information of the energy storage unit, that is, the working state of the non-energy storage unit is reasonably adjusted according to the actual operation needs of the energy storage unit to save the operation cost of the non-energy storage unit.

[0009] In a possible implementation, the state information includes at least one of temperature information, voltage, insulation resistance value, state of charge (SOC) and state of health (SOH) of the energy storage unit of the energy storage system.

[0010] The temperature information, voltage, insulation resistance value, state of charge (SOC) and state of health (SOH) of the energy storage unit are all state information related to the working state of the energy storage unit. By obtaining these state information of the energy storage unit, the real-time working conditions of the energy storage unit can be mastered.

[0011] In a possible implementation, the management module of the energy storage unit includes a battery management system (BMS) and / or an energy management system (EMS).

[0012] The battery management system (BMS) and the energy management system (EMS) can manage and control the entire battery energy storage system according to the state information of the energy storage unit.

[0013] In a possible implementation, the temperature information includes a temperature rise rate of the energy storage unit.

[0014] The temperature rise rate of the energy storage unit is state information reflecting temperature change of the energy storage unit in a working state, and the temperature rise rate of the energy storage unit can be used to determine whether the energy storage unit has a risk of thermal runaway, and the working state of the non-energy storage unit is adjusted accordingly to ensure safe operation of the energy storage system.

[0015] In a possible implementation, the domain controller is configured to determine the working mode of the thermal management unit according to the temperature rise rate of the energy storage unit.

[0016] The working mode of the thermal management unit is determined according to the temperature rise rate of the energy storage unit, that is, the working state of the thermal management unit is adjusted reasonably according to the temperature rise rate of the energy storage unit, so that the energy storage unit is in a suitable working condition, and efficient and safe operation of the energy storage system is ensured.

[0017] In a possible implementation, the domain controller is configured to determine the working mode of the fire extinguishing unit according to the temperature rise rate of the energy storage unit and the working mode of the thermal management unit.

[0018] The thermal management unit adjusts its working state according to the temperature rise rate of the energy storage unit, when the thermal management unit reaches the limit of adjusting the working condition of the energy storage unit, and the energy storage unit is still not in a suitable working condition or even has a risk of thermal runaway, the fire extinguishing unit changes the working mode to participate in adjusting the working condition of the energy storage unit, to avoid safety problems such as thermal runaway of the energy storage system.

[0019] In a possible implementation, the domain controller is configured to, in a case where the temperature rise rate of the energy storage unit is not less than a first threshold value and lasts for a certain time period, determine whether the temperature rise rate of the energy storage unit is not less than a second threshold value, the second threshold value being greater than the first threshold value; and in a case where the temperature rise rate of the energy storage unit is not less than the second threshold value, determine the working mode of the thermal management unit as a full-power refrigeration mode.

[0020] In a case where the temperature rise rate of the energy storage unit is not less than the first threshold value and lasts for a certain time period, and the temperature rise rate of the energy storage unit continues to rise and is not less than the second threshold value, it is determined that the thermal management unit works in the full-power refrigeration mode, and the energy storage unit is cooled with full power to avoid thermal runaway of the energy storage system.

[0021] In a possible implementation, the domain controller is configured to, in a case where the working mode of the thermal management unit is the full-power refrigeration mode and the temperature rise rate of the energy storage unit is less than a third threshold value, the third threshold value being greater than the second threshold value, determine the working mode of the fire extinguishing unit as a shutdown mode.

[0022] When the thermal management unit cools the energy storage unit in the full-power refrigeration mode, the temperature rise rate of the energy storage unit continues to increase, but does not exceed the third threshold value, the fire-fighting unit is determined to be in the closed mode and does not participate in the temperature adjustment of the energy storage unit, and the thermal management unit continues to cool the energy storage unit in the full-power refrigeration mode. In this way, the fire-fighting unit can be started in the case that the thermal management unit can effectively adjust the temperature of the energy storage unit, so as to avoid irreversible performance damage to the energy storage unit when the fire-fighting system is started unnecessarily.

[0023] In a possible implementation, the domain controller is configured to determine that the working mode of the fire-fighting unit is the open mode when the working mode of the thermal management unit is the full-power refrigeration mode and the temperature rise rate of the energy storage unit is not less than a third threshold value, the third threshold value being greater than the second threshold value.

[0024] When the thermal management unit cools the energy storage unit in the full-power refrigeration mode, and the temperature rise rate of the energy storage unit continues to increase and exceeds the third threshold value, that is, the thermal management unit cannot effectively control the temperature rise rate of the energy storage unit in the full-power refrigeration mode, the fire-fighting system is determined to be in the open mode, and the fire-fighting system participates in the temperature adjustment of the energy storage unit, so as to avoid thermal runaway of the energy storage system and safety problems of the energy storage system.

[0025] In a second aspect, an energy storage system is provided, including: an energy storage unit; a non-energy storage unit including a thermal management unit and a fire-fighting unit, the non-energy storage unit being configured to assist the energy storage unit; and a domain controller integrating a management module of the energy storage unit and a management module of the non-energy storage unit, and configured to manage the non-energy storage unit according to state information of the energy storage unit.

[0026] In a possible implementation, the state information includes at least one of temperature information, voltage, insulation resistance value, state of charge (SOC) and state of health (SOH) of the energy storage unit of the energy storage system.

[0027] In a possible implementation, the management module of the energy storage unit includes a battery management system (BMS) and / or an energy management system (EMS).

[0028] In a possible implementation, the temperature information includes a temperature rise rate of the energy storage unit.

[0029] In a possible implementation, the domain controller is configured to determine the working mode of the thermal management unit according to the temperature rise rate of the energy storage unit.

[0030] In a possible implementation, the domain controller is configured to determine the working mode of the fire extinguishing unit according to the temperature rise rate of the energy storage unit and the working mode of the thermal management unit.

[0031] In a possible implementation, the domain controller is configured to, in a case where the temperature rise rate of the energy storage unit is not less than a first threshold value and lasts for a certain time period, determine whether the temperature rise rate of the energy storage unit is not less than a second threshold value, the second threshold value being greater than the first threshold value; and in a case where the temperature rise rate of the energy storage unit is not less than the second threshold value, determine the working mode of the thermal management unit as the full-power refrigeration mode.

[0032] In a possible implementation, the domain controller is configured to, in a case where the working mode of the thermal management unit is the full-power refrigeration mode and the temperature rise rate of the energy storage unit is less than a third threshold value, the third threshold value being greater than the second threshold value, determine the working mode of the fire extinguishing unit as the off mode.

[0033] In a possible implementation, the domain controller is configured to, in a case where the working mode of the thermal management unit is the full-power refrigeration mode and the temperature rise rate of the energy storage unit is not less than a third threshold value, the third threshold value being greater than the second threshold value, determine the working mode of the fire extinguishing unit as the on mode.

[0034] The present application provides a domain controller for an energy storage system, which integrates a management module of an energy storage unit and a management module of a non-energy storage unit. Compared with the prior art in which the management module of the energy storage unit and the management module of the non-energy storage unit are separately arranged, the present application integrates the management module of the energy storage unit and the management module of the non-energy storage unit in the domain controller. The domain controller can centrally control the management module of the energy storage unit and the management module of the non-energy storage unit, so that the information interaction between the management module of the energy storage unit and the management module of the non-energy storage unit is smooth and rapid, the system management efficiency is improved, and the information of the management module of the energy storage unit and the management module of the non-energy storage unit can be integrated and processed, thereby avoiding the waste of system resources caused by multiple information processing. In particular, after the management module of the fire extinguishing unit and the management module of the energy storage unit are integrated in the domain controller, the fire extinguishing unit can timely obtain the state information of the energy storage unit, and the working state is adjusted in a timely manner by the domain controller to ensure the safety of the energy storage system. In addition, the non-energy storage unit is managed according to the state information of the energy storage unit, that is, the working state of the non-energy storage unit is reasonably adjusted according to the actual operation needs of the energy storage unit, thereby saving the operation cost of the non-energy storage unit. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the drawings.

[0036] Figure 1 is a schematic diagram of a storage energy system disclosed by an embodiment of the present application;

[0037] Figure 2 is a schematic diagram of a storage energy system disclosed by an embodiment of the present application;

[0038] Figure 3 is a schematic diagram of a storage energy system disclosed by an embodiment of the present application. DETAILED DESCRIPTION

[0039] The embodiments of the present application will be further described in detail below with reference to the drawings and embodiments. The detailed description of the following embodiments and the drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, i.e., the present application is not limited to the described embodiments.

[0040] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like only serves to facilitate the description of the present application and simplify the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error.

[0041] The orientation words appearing in the following description are the directions shown in the drawings, and are not limited to the specific structure of the present application. In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The term "and / or" in the present application is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects are in an "or" relationship.

[0043] Based on the background of national power reform and the substantial increase in renewable energy generation capacity, energy storage technology will play an important role in the five links of power generation, transmission, transformation, distribution and use. Battery energy storage systems are increasingly widely used in new energy, smart grid, energy saving technology and other fields.

[0044] Battery energy storage systems realize the functions of power storage, peak clipping and valley filling, and new energy output fluctuation suppression in distributed power generation and microgrid systems, which are essential links in the system. With the continuous development of energy storage technology and the strong support of countries around the world for batteries and new energy technology, large-scale battery energy storage system devices have been increasingly researched and applied.

[0045] With the development of the energy storage industry, the working efficiency, safety performance and cycle life of the battery energy storage system are the focus of attention, and these performances of the battery energy storage system are closely related to the management of the battery energy storage system. Reasonable management of the battery energy storage system can effectively improve the performance of the battery energy storage system and save the operation cost of the battery energy storage system.

[0046] For example, in the existing battery energy storage system, the thermal management unit and the fire extinguishing unit work independently, and the fire extinguishing unit is often triggered to start the working mode by means of temperature sensor or smoke sensor. Since the battery energy storage system includes multiple batteries, the temperature sensor or the smoke sensor will be triggered only when the overall temperature of the energy storage system reaches a certain value or the smoke concentration of the energy storage system reaches a certain value. This will cause the temperature sensor or the smoke sensor not to be triggered when individual batteries far away from the temperature sensor or the smoke sensor in the energy storage system occur thermal runaway, and the fire extinguishing system will not start, resulting in thermal runaway of the energy storage system.

[0047] In view of this, the embodiment of the present application provides a domain controller for an energy storage system. The domain controller integrates the management module of the energy storage unit and the management module of the non-energy storage unit. Compared with the prior art in which the management module of the energy storage unit and the management module of the non-energy storage unit are arranged separately, the present application integrates the management module of the energy storage unit and the management module of the non-energy storage unit in the domain controller. The management module of the energy storage unit and the management module of the non-energy storage unit can be controlled by the domain controller, so that the information interaction between the management module of the energy storage unit and the management module of the non-energy storage unit is smooth and rapid, the system management efficiency is improved, and the information of the management module of the energy storage unit and the management module of the non-energy storage unit can be integrated and processed, thereby avoiding the waste of system resources caused by multiple information processing. In particular, after the management module of the fire-fighting unit and the management module of the energy storage unit are integrated in the domain controller, the fire-fighting unit can obtain the state information of the energy storage unit in time, and the working state is adjusted in time by the domain controller, thereby solving the problem that the battery thermal runaway cannot be controlled in time due to the fact that the fire-fighting unit can only start the working mode by triggering the temperature sensor or the smoke sensor, and improving the safety of the energy storage system. In addition, the non-energy storage unit is managed according to the state information of the energy storage unit, that is, the working state of the non-energy storage unit is adjusted reasonably according to the actual operation needs of the energy storage unit, thereby saving the operation cost of the non-energy storage unit.

[0048] Figure 1 is a schematic diagram of an energy storage system 100 provided by the present application.

[0049] The energy storage system 100 includes a plurality of battery clusters, such as Figure 1 battery cluster 1 to battery cluster m as shown in the figure, where m can be a natural number greater than 1, that is, in actual application, the number of battery clusters can be flexibly adjusted according to the energy storage capacity. If the energy storage capacity is large, the number of battery clusters can be appropriately increased, and if the energy storage capacity is small, the number of battery clusters can be appropriately reduced.

[0050] Each battery cluster is composed of at least two battery energy storage modules (ESS) in series, such as Figure 1 energy storage module 1 to energy storage module j in the figure, where j can be a natural number greater than or equal to 2. Each energy storage module ESS is composed of a plurality of energy storage elements in series or parallel, forming the smallest energy storage and management unit. In order to realize the detection and control of the energy storage system, a battery management system BMS is designed in each energy storage module and battery cluster to monitor the battery information such as battery state of charge SOC, temperature, current, etc., and to perform real-time information interaction with the upper layer energy management system EMS or power conversion system (PCS), thereby realizing the management and control of the entire battery energy storage system.

[0051] The battery management system BMS, the energy management system EMS, and the power conversion system PCS of the energy storage system are usually designed separately, and the information exchange between the systems is delayed and not smooth.

[0052] The application provides an energy storage system, which can be used for Figure 1 The energy storage system 100 in the energy storage system 100.

[0053] As shown in Figure 2 The energy storage system 200 includes an energy storage unit 201 and a non-energy storage unit 202, and the non-energy storage unit 202 is used for assisting the energy storage unit 201. The non-energy storage unit 202 includes a thermal management unit and a fire extinguishing unit. The thermal management unit can cool the battery pack of the energy storage unit 201 when the temperature of the battery pack is too high, and can heat the battery pack when the battery pack needs to be heated to improve the charging and discharging speed. The fire extinguishing unit can extinguish fire when thermal runaway occurs in the battery energy storage system.

[0054] The domain controller 203 integrates an energy storage unit management module 2011 and a non-energy storage unit management module 2021, and is used for managing the non-energy storage unit 202 according to the state information of the energy storage unit 201.

[0055] The temperature information of the battery is important state information reflecting the working state of the battery. The temperature of the battery is an important factor affecting the aging of the battery. A suitable working temperature can slow down the aging of the battery and also play the optimal performance of the battery. Therefore, the non-energy storage unit 202 is managed according to the temperature information of the battery, so that the battery is in a suitable working temperature, which is beneficial to improve the performance of the battery and ensure that the energy storage system can be efficiently and safely operated.

[0056] In the embodiments of the present application, the energy storage unit management module 2011 and the non-energy storage unit management module 2021 are integrated in the domain controller 203. Compared with the existing scheme in which the energy storage unit management module 2011 and the non-energy storage unit management module 2021 of the energy storage system 200 are dispersedly arranged, the scheme in which the energy storage unit management module 2011 and the non-energy storage unit management module 2021 are integrated in the domain controller 203 can realize centralized control of the energy storage unit management module 2011 and the non-energy storage unit management module 2021 by the domain controller 203, so that information interaction between the energy storage unit management module 2011 and the non-energy storage unit management module 2021 is smooth and rapid, the system management efficiency is improved, and the information of the energy storage unit management module 2011 and the non-energy storage unit management module 2021 can be integrated and processed to avoid system resource waste caused by multiple information processing. Especially, after the management module 2021 of the fire-fighting unit and the energy storage unit management module 2011 are integrated in the domain controller 203, the fire-fighting unit can obtain the state information of the energy storage unit 201 in time, and the working state is adjusted in time by the domain controller 203 to ensure the safety of the energy storage system 200. In addition, the non-energy storage unit 202 is managed according to the state information of the energy storage unit 201, that is, the working state of the non-energy storage unit 202 is reasonably adjusted according to the actual operation needs of the energy storage unit 201, so as to save the operation cost of the non-energy storage unit 202.

[0057] Optionally, in the embodiments of the present application, the state information of the energy storage system includes at least one of temperature information, voltage, insulation resistance value, state of charge SOC and state of health SOH of the energy storage unit of the energy storage system.

[0058] The temperature of the battery is an important factor affecting the aging of the battery, and appropriate working temperature can slow down the aging of the battery and also play the optimal performance of the battery, so it is necessary to monitor the temperature of the battery in real time, adjust the working mode of the thermal management unit to ensure that the battery maintains appropriate working temperature, and when the temperature of the battery abnormally rises, the battery temperature can be reduced by the fire-fighting system.

[0059] The insulation resistance of the battery refers to a thermistor with negative temperature coefficient, whose resistance decreases exponentially with the increase of temperature, and the resistance value decreases with the increase of temperature.

[0060] The state of charge SOC of the battery is a physical quantity used to reflect the remaining capacity condition of the battery, which represents the ratio of the remaining capacity of the battery after a period of use or long-term storage to the capacity of the fully charged state.

[0061] The state of health SOH of the battery is a quality factor of the battery compared with its ideal state, and generally decreases with the increase of the use time and frequency. Generally, the state of health SOH of the battery is determined by the changes of the electrical parameters such as the internal resistance, capacity, voltage, self-discharge speed, charging capacity, and charging and discharging cycles.

[0062] It should be understood that the above-mentioned state information is only an example and does not limit the present application. The state information in the embodiments of the present application can include any of the above-mentioned state information, but is not limited to the above-mentioned state information.

[0063] The temperature information, voltage, insulation resistance value, state of charge SOC, state of health SOH of the energy storage unit are all state information related to the working state of the energy storage unit. The acquisition of these state information of the energy storage unit can master the real-time working conditions of the energy storage unit.

[0064] Optionally, in the embodiments of the present application, the management module 2011 of the energy storage unit 201 includes a battery management system BMS and / or an energy management system EMS.

[0065] The battery management system BMS interacts with the energy management system EMS by monitoring the state information such as the state of charge SOC, temperature, and current of the battery, and realizes the management and control of the whole battery energy storage system. For example, the battery management system BMS estimates the state of charge SOC of the battery to ensure that the SOC is maintained within a reasonable range, and prevents damage to the battery due to overcharging or overdischarging; during the charging and discharging process of the battery, the battery management system BMS collects the terminal voltage and temperature of each battery in the battery pack, the charging and discharging current, and the total voltage of the battery pack in real time, prevents the battery from overcharging or overdischarging, and prolongs the service life of the battery.

[0066] It should be understood that the above-mentioned energy storage unit management module 2011 is only an example and does not limit the present application. The energy storage unit management module 2011 in the embodiments of the present application can include any of the above-mentioned management modules, but is not limited to the above-mentioned management modules.

[0067] Optionally, in the embodiments of the present application, the temperature information includes the temperature rise rate of the energy storage unit 201.

[0068] The temperature rise rate of the energy storage unit 201 is state information reflecting the temperature change of the energy storage unit 201 in the working state. According to the temperature rise rate of the energy storage unit 201, it can be judged whether the energy storage unit 201 has the risk of thermal runaway, and the working state of the non-energy storage unit 202 is adjusted accordingly to ensure the safe operation of the energy storage system 200.

[0069] Optionally, in the embodiment of the present application, the domain controller 203 is configured to determine the working mode of the thermal management unit according to the temperature rise rate of the energy storage unit 201.

[0070] Specifically, when the temperature rise rate of the energy storage unit is abnormal (the temperature rise value is large in a short time), the cooling capacity of the thermal management unit can be increased to speed up the cooling speed of the energy storage unit by increasing the rotation speed of the compressor and the cooling fan, increasing the flow rate of the cooling liquid, and the like; correspondingly, when the temperature rise rate of the energy storage unit is small and the temperature of the energy storage unit is low, the cooling capacity of the thermal management unit can be appropriately reduced, or the thermal management unit can be stopped to cool to increase the temperature rise rate of the energy storage unit.

[0071] According to the temperature rise rate of the energy storage unit 201, the working mode of the thermal management unit is determined, that is, the working state of the thermal management unit is reasonably adjusted according to the temperature rise rate of the energy storage unit 201, so that the energy storage unit 201 is in a suitable working condition, and the efficient and safe operation of the energy storage system 200 is ensured.

[0072] Optionally, in the embodiment of the present application, the domain controller 203 is configured to determine the working mode of the fire extinguishing unit according to the temperature rise rate of the energy storage unit 201 and the working mode of the thermal management unit.

[0073] That is, when the temperature rise value of the energy storage unit 201 is large in a short time, and the thermal management unit is in full-power cooling state by increasing the rotation speed of the compressor and the cooling fan, and increasing the flow rate of the cooling liquid, the temperature rise rate of the energy storage unit 201 is still not controlled. Then the fire extinguishing unit is started to participate in adjusting the temperature of the energy storage unit 201.

[0074] The thermal management unit adjusts its own working state according to the temperature rise rate of the energy storage unit 201. When the thermal management unit reaches the limit of adjusting the working condition of the energy storage unit 201, and the energy storage unit 201 is still not in a suitable working condition or even has a risk of thermal runaway, the fire extinguishing unit changes the working mode to participate in adjusting the working condition of the energy storage unit 201, to avoid the safety problems such as thermal runaway of the energy storage system 200.

[0075] Optionally, in the embodiment of the present application, the domain controller 203 is configured to, in a case where the temperature rise rate of the energy storage unit 201 is not less than a first threshold value and lasts for a certain time period, determine whether the temperature rise rate of the energy storage unit 201 is not less than a second threshold value, the second threshold value being greater than the first threshold value; and in a case where the temperature rise rate of the energy storage unit 201 is not less than the second threshold value, determine the working mode of the thermal management unit as a full-power cooling mode.

[0076] Optionally, the first threshold is 0.01-2 ℃ / min, the temperature rising rate of the energy storage unit 201 is not less than the first threshold, and the duration of the state is 10-300 s, and the second threshold is 2-10 ℃ / min. It should be understood that the above numerical ranges are only exemplary descriptions of the embodiments of the present application, and do not constitute a limitation on the present application. The actual parameter setting can be adjusted according to the actual working state of the energy storage system.

[0077] In the case that the temperature rising rate of the energy storage unit 201 is not less than the first threshold and continues for a certain period of time, and the temperature rising rate continues to rise and is not less than the second threshold, it is determined that the thermal management unit works in the full-power cooling mode, and the full power is used to cool the energy storage unit 201 to avoid thermal runaway of the energy storage system 200.

[0078] Optionally, in the embodiments of the present application, the domain controller 203 is configured to: in the case that the working mode of the thermal management unit is the full-power cooling mode and the temperature rising rate of the energy storage unit 201 is less than a third threshold, the working mode of the fire extinguishing unit is determined to be the closed mode, and the third threshold is greater than the second threshold, for example, the third threshold can be 10-50 ℃ / min.

[0079] When the thermal management unit cools the energy storage unit 201 in the full-power cooling mode, and the temperature rising rate of the energy storage unit 201 continues to increase but does not exceed the third threshold, the fire extinguishing unit is determined to be in the closed mode and does not participate in the temperature adjustment of the energy storage unit 201, and the thermal management unit continues to cool the energy storage unit 201 in the full-power cooling mode. In this way, in the case that the thermal management unit can effectively adjust the temperature of the energy storage unit 201, the fire extinguishing unit is not started to avoid causing irreversible performance damage to the energy storage unit 201 in unnecessary cases.

[0080] Optionally, in the embodiments of the present application, the domain controller 203 is configured to: in the case that the working mode of the thermal management unit is the full-power cooling mode and the temperature rising rate of the energy storage unit 201 is not less than the third threshold, the working mode of the fire extinguishing unit is determined to be the open mode.

[0081] When the thermal management unit cools the energy storage unit in the full-power cooling mode, and the temperature rising rate of the energy storage unit 201 continues to increase and exceeds the third threshold, that is, the thermal management unit works in the full-power cooling mode and cannot effectively control the temperature rising rate of the energy storage unit 201, the fire extinguishing system is determined to be in the open mode, and the fire extinguishing system participates in the adjustment of the temperature of the energy storage unit to avoid thermal runaway of the energy storage system 200 and safety problems of the energy storage system 200.

[0082] The present application also provides an energy storage system 300, as shown in Figure 3As shown, the energy storage system 300 includes an energy storage unit 301, a non-energy storage unit 302, and a domain controller 303.

[0083] The non-energy storage unit 302 is used to assist the energy storage unit 301, and the non-energy storage unit 302 includes a thermal management unit and a fire-fighting unit.

[0084] The domain controller 303 integrates a management module of the energy storage unit 301 and a management module of the non-energy storage unit 302, and is configured to manage the non-energy storage unit 302 according to state information of the energy storage unit 301.

[0085] In the embodiments of the present application, the management module of the energy storage unit 301 and the management module of the non-energy storage unit 302 are integrated in the domain controller 303. Compared with the prior art scheme in which the management module of the energy storage unit 301 and the management module of the non-energy storage unit 302 are distributed, the scheme of integrating the management module of the energy storage unit 301 and the management module of the non-energy storage unit 302 in the domain controller 303 can centrally control the management module of the energy storage unit 301 and the management module of the non-energy storage unit 302 through the domain controller 303, so that the information interaction between the management module of the energy storage unit 301 and the management module of the non-energy storage unit 302 is smooth and rapid, the system management efficiency is improved, and the information of the management module of the energy storage unit 301 and the management module of the non-energy storage unit 302 can be integrated and processed to avoid system resource waste caused by multiple information processing. In particular, after the management module of the fire-fighting unit and the management module of the energy storage unit 301 are integrated in the domain controller 303, the fire-fighting unit can obtain the state information of the energy storage unit 301 in time, and the working state is adjusted in time by the domain controller 303 to ensure the safety of the energy storage system 300. In addition, the non-energy storage unit 302 is managed according to the state information of the energy storage unit 301, that is, the working state of the non-energy storage unit 302 is reasonably adjusted according to the actual operation needs of the energy storage unit 301, so as to save the operation cost of the non-energy storage unit 302.

[0086] Optionally, in the embodiments of the present application, the state information of the energy storage system includes at least one of temperature information, voltage, insulation resistance value, state of charge SOC, and state of health SOH of the energy storage unit of the energy storage system.

[0087] Optionally, in the embodiments of the present application, the management module of the energy storage unit 301 includes a battery management system BMS and / or an energy management system EMS.

[0088] Optionally, in the embodiments of the present application, the temperature information includes a temperature rise rate of the energy storage unit 301.

[0089] Optionally, in the embodiments of the present application, the domain controller 303 is configured to determine a working mode of the thermal management unit according to the temperature rise rate of the energy storage unit 301.

[0090] Optionally, in the embodiment of the present application, the domain controller 303 is configured to determine the working mode of the fire-fighting unit according to the temperature rise rate of the energy storage unit 301 and the working mode of the thermal management unit.

[0091] Optionally, in the embodiment of the present application, the domain controller 303 is configured to, in the case that the temperature rise rate of the energy storage unit 301 is not less than the first threshold value and lasts for a certain period of time, determine whether the temperature rise rate of the energy storage unit 301 is not less than a second threshold value, the second threshold value being greater than the first threshold value; and in the case that the temperature rise rate of the energy storage unit 301 is not less than the second threshold value, determine the working mode of the thermal management unit as the full-power refrigeration mode.

[0092] Optionally, in the embodiment of the present application, the domain controller 303 is configured to, in the case that the working mode of the thermal management unit is the full-power refrigeration mode and the temperature rise rate of the energy storage unit 301 is less than a third threshold value, the third threshold value being greater than the second threshold value, determine the working mode of the fire-fighting unit as the off mode.

[0093] Optionally, in the embodiment of the present application, the domain controller 303 is configured to, in the case that the working mode of the thermal management unit is the full-power refrigeration mode and the temperature rise rate of the energy storage unit 301 is not less than the third threshold value, determine the working mode of the fire-fighting unit as the on mode.

[0094] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to the present application and equivalents thereof without departing from the scope of the present application. In particular, the technical features mentioned in each of the embodiments can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A domain controller for an energy storage system, characterized in that, The energy storage system includes an energy storage unit and a non-energy storage unit. The non-energy storage unit includes a thermal management unit and a fire protection unit. The non-energy storage unit is used to assist the energy storage unit. The domain controller integrates the management module of the energy storage unit and the management module of the non-energy storage unit, and is used to manage the non-energy storage unit according to the status information of the energy storage unit.

2. The domain controller according to claim 1, characterized in that, The status information includes at least one of the following: temperature information, voltage, insulation resistance value, state of charge (SOC), and state of health (SOH) of the energy storage unit of the energy storage system.

3. The domain controller according to claim 1, characterized in that, The management module of the energy storage unit includes a battery management system (BMS) and / or an energy management system (EMS).

4. The domain controller according to claim 2, characterized in that, The temperature information includes the rate of temperature rise of the energy storage unit.

5. The domain controller according to claim 4, characterized in that, The domain controller is used for: The operating mode of the thermal management unit is determined based on the rate of temperature rise of the energy storage unit.

6. The domain controller according to claim 5, characterized in that, The domain controller is used for: The operating mode of the fire protection unit is determined based on the temperature rise rate of the energy storage unit and the operating mode of the thermal management unit.

7. The domain controller according to any one of claims 4 to 6, characterized in that, The domain controller is used for: If the temperature rise rate of the energy storage unit is not less than a first threshold and continues for a certain period of time, it is determined whether the temperature rise rate of the energy storage unit is not less than a second threshold, wherein the second threshold is greater than the first threshold. If the temperature rise rate of the energy storage unit is not less than the second threshold, the operating mode of the thermal management unit is determined to be full-power cooling mode.

8. The domain controller according to claim 7, characterized in that, The domain controller is used for: When the thermal management unit is operating in full-power cooling mode and the temperature rise rate of the energy storage unit is less than a third threshold, the operating mode of the fire protection unit is determined to be the shutdown mode, where the third threshold is greater than the second threshold.

9. The domain controller according to claim 7, characterized in that, The domain controller is used for: When the thermal management unit is in full-power cooling mode and the temperature rise rate of the energy storage unit is not less than a third threshold, the fire protection unit is determined to be in open mode, where the third threshold is greater than the second threshold.

10. An energy storage system, characterized in that, include: Energy storage unit; A non-energy storage unit, which includes a thermal management unit and a fire protection unit, is used to assist the energy storage unit. and A domain controller, which integrates the management module of the energy storage unit and the management module of the non-energy storage unit, is used to manage the non-energy storage unit according to the status information of the energy storage unit.

11. The energy storage system according to claim 10, characterized in that, The status information includes at least one of the following: temperature information, voltage, insulation resistance value, state of charge (SOC), and state of health (SOH) of the energy storage unit of the energy storage system.

12. The energy storage system according to claim 10, characterized in that, The management module of the energy storage unit includes a battery management system (BMS) and / or an energy management system (EMS).

13. The energy storage system according to claim 11, characterized in that, The temperature information includes the rate of temperature rise of the energy storage unit.

14. The energy storage system according to claim 13, characterized in that, The domain controller is used for: The operating mode of the thermal management unit is determined based on the rate of temperature rise of the energy storage unit.

15. The energy storage system according to claim 14, characterized in that, The domain controller is used for: The operating mode of the fire protection unit is determined based on the temperature rise rate of the energy storage unit and the operating mode of the thermal management unit.

16. The energy storage system according to any one of claims 13 to 15, characterized in that, The domain controller is used for: If the temperature rise rate of the energy storage unit is not less than a first threshold and continues for a certain period of time, it is determined whether the temperature rise rate of the energy storage unit is not less than a second threshold, wherein the second threshold is greater than the first threshold. If the temperature rise rate of the energy storage unit is not less than the second threshold, the operating mode of the thermal management unit is determined to be full-power cooling mode.

17. The energy storage system according to claim 16, characterized in that, The domain controller is used for: When the thermal management unit is operating in full-power cooling mode and the temperature rise rate of the energy storage unit is less than a third threshold, the operating mode of the fire protection unit is determined to be the shutdown mode, where the third threshold is greater than the second threshold.

18. The energy storage system according to claim 16, characterized in that, The domain controller is used for: When the thermal management unit is in full-power cooling mode and the temperature rise rate of the energy storage unit is not less than a third threshold, the fire protection unit is determined to be in open mode, where the third threshold is greater than the second threshold.

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