Battery management method, energy management system and energy storage system

Abstract

The present disclosure relates to new energy, and provides a battery management method, an energy management system and an energy storage system. The method comprises: connecting the energy management system and the battery management system in a communication line; the energy management system simulates the original vehicle battery pack in the running environment of the actual vehicle, communicates with the battery management system, acquires the battery running parameters of the original vehicle battery pack from the battery management system in real time, and performs charging and discharging of the energy storage unit through the energy storage converter unit based on an energy scheduling strategy. Thus, by simulating the running environment through the energy management system, the energy storage system can be constructed by using the redundant original vehicle battery pack, the maintenance cost problem of the redundant original vehicle battery pack is solved, and new energy consumption and power supply are effectively supported.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of new energy technology, in particular to a battery management method, an energy management system and an energy storage system. BACKGROUND

[0002] An energy storage power station is a facility that can convert renewable energy (such as solar energy, wind energy, etc.) into electrical energy and store it for power supply during peak demand or power system failure. The core function of the energy storage power station is to balance the supply and demand contradiction in the power system, and improve the stability and reliability of the power system.

[0003] In a battery-based energy storage power station, the battery as the core energy storage device, its own cost and control management (and corresponding research and development) cost are the primary considerations for establishing an energy storage power station. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present disclosure is to provide an energy storage system and an energy storage power station to solve the problems in the related art.

[0005] The first aspect of the present disclosure provides a battery management method applied to an energy management system of an energy storage system, the energy storage system comprising an energy storage unit, the energy storage unit being constructed based on an original vehicle battery pack for a new energy vehicle, the original vehicle battery pack comprising a battery management system; the method comprising: the energy management system and the battery management system forming a communication line connection; the energy management system simulating the original vehicle battery pack in the running environment of an actual vehicle and communicating with the battery management system to obtain the battery operating parameters of the original vehicle battery pack from the battery management system in real time, and performing charging and discharging of the energy storage unit through an energy storage converter based on an energy scheduling strategy.

[0006] In an embodiment of the first aspect, the energy management system forms a communication line connection with the battery management system through a converter of a preset communication interface to a CAN interface.

[0007] In an embodiment of the first aspect, the battery operating parameters of the energy storage unit include at least one of the following: at least one of cell temperature, cell voltage, cell current, busbar temperature, state of charge, health, battery energy / power adjustable depth, fault level, high-voltage interlock information, communication state, etc.

[0008] In an embodiment of the first aspect, the battery management method further comprises: the battery management system detecting in real time the operating parameters of each cell in the original vehicle battery pack and the temperature of the battery pack, and limiting the operating conditions of the cells within the safe operating area; the energy management system determining whether the energy storage system is operating under normal conditions based on the battery operating parameters obtained from the battery management system; if not, the energy storage system is disconnected from the connected external power grid.

[0009] In an embodiment of the first aspect, the energy storage unit is connected to an AC bus through an energy storage converter; the AC bus forms a plurality of power supply branches; the AC bus and the power supply branches are provided with AC switch units; the energy management system is communicatively connected to a programmable logic controller, and the programmable logic controller is connected to each of the AC switch units; the battery management method comprises: the energy management system instructing the programmable logic controller to control the on / off of each of the AC switch units; and when an energy management system failure is detected, the programmable logic controller closes a specified AC switch unit.

[0010] In an embodiment of the first aspect, the original vehicle battery pack is connected to the energy storage converter through a DC switch unit; the programmable logic controller is connected to each of the DC switch units; the battery management method comprises: the energy management system instructing the programmable logic controller to control the on / off of each of the DC switch units; and when an energy management system failure is detected, the programmable logic controller closes a specified DC switch unit.

[0011] In an embodiment of the first aspect, the energy management system is configured to control the charging and discharging of the energy storage unit based on an energy scheduling strategy; the energy scheduling strategy comprises at least one of the following: 1) charging the energy storage unit according to the valley and flat values of the local electricity price and discharging the energy storage unit according to the peak value; 2) when the power consumption scenario in which the energy storage system is located is limited in terms of power grid power consumption, discharging the energy storage unit according to the power requirement of the power consumption scenario; when the discharging power is greater than the load power of the external load in the power consumption scenario, limiting the reverse flow output of the energy storage unit to the upstream external power grid; 3) the energy storage unit is coupled to an AC bus through an energy storage converter; a transformer is arranged on the AC bus or in the line between the AC bus and the energy storage converter; the sum of the load powers of the loads connected to the output side of the transformer is less than the rated capacity of the transformer; 4) based on the set demand of the set power consumption scenario, limiting the power supply power of the entire energy storage system in the power consumption scenario from the external power grid to be less than the difference between the set demand and the load power of the external load in the power consumption scenario; and when the load power of the external load is greater than the set demand, stopping the charging of the energy storage unit.

[0012] In an embodiment of the first aspect, the energy management system is communicatively connected with a cloud platform monitoring system, and the battery management method comprises: the energy management system sending operation state data of the energy storage system to the cloud platform monitoring system for display; or receiving a user remote control instruction issued by the cloud platform monitoring system and performing a corresponding control action.

[0013] The second aspect of the present disclosure provides an energy management system, comprising:

[0014] a communicator, a processor, and a memory;

[0015] The memory stores a computer program or instructions;

[0016] The processor is configured to execute the computer program or instructions to perform the battery management method according to any one of the first aspect.

[0017] The third aspect of the present disclosure provides an energy storage system comprising one or more energy management systems according to the second aspect.

[0018] As described above, the present disclosure relates to new energy, and provides a battery management method, an energy management system, and an energy storage system. The method comprises: the energy management system being communicatively connected with the battery management system; the energy management system simulating the original vehicle battery pack in the actual vehicle operating environment and communicating with the battery management system to obtain the battery operating parameters of the original vehicle battery pack in real time, and performing charging and discharging of the energy storage unit through the energy storage converter unit based on an energy scheduling strategy. Thus, by simulating the operating environment through the energy management system, the redundant original vehicle battery pack can be used to build an energy storage system, thereby solving the problem of maintenance cost of the redundant original vehicle battery pack and effectively supporting new energy consumption and power supply. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 An electrical connection structure schematic diagram of the energy storage system in an embodiment of the present disclosure is shown.

[0020] Figure 2 A structure schematic diagram of the energy storage converter in an embodiment of the present disclosure is shown.

[0021] Figure 3 A communication connection structure schematic diagram between the energy management system and other components in an embodiment of the present disclosure is shown.

[0022] Figure 4A A flowchart schematic diagram of the battery management method of the energy management system in an embodiment of the present disclosure is shown.

[0023] Figure 4B A principle schematic diagram of the battery management method is shown. Figure 4A ​

[0024] Figure 5 A mechanical structure schematic diagram of the energy storage system in the embodiment of the present disclosure is shown.

[0025] Figure 6 A layout structure schematic diagram of the fire control system of the energy storage system in the embodiment of the present disclosure is shown.

[0026] Figure 7 A structure schematic diagram of the fire control unit in the embodiment of the present disclosure is shown.

[0027] Figure 8 A structure schematic diagram of the computer device in the embodiment of the present disclosure is shown.

[0028] Figure 9 A power consumption scenario schematic diagram in the embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0029] The embodiments of the present disclosure are described below by way of specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the disclosed messages. The present disclosure can also be implemented or applied by other different specific embodiments, and the details in the present disclosure can be modified or changed in different views and applications without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0030] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily implement the present disclosure. The present disclosure can be embodied in various different forms, and is not limited to the embodiments described herein.

[0031] In the representation of the present disclosure, the representation of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. Moreover, the specific features, structures, materials or characteristics represented can be combined in any one or group of embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples represented in the present disclosure without contradiction.

[0032] In addition, the terms "first", "second" are only used for the purpose of representation, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the representation of the present disclosure, the meaning of "a group" is two or more, unless otherwise specifically limited.

[0033] For the sake of clearness of the present disclosure, devices irrelevant to the description are omitted, and the same reference numerals are given to the same or similar constituent elements throughout the specification.

[0034] Throughout the specification, when it is said that a certain device is "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" in which other elements are interposed therebetween. In addition, when it is said that a certain device "includes" a certain constituent element, other constituent elements are not excluded unless specifically stated to the contrary, but it means that other constituent elements can be further included.

[0035] Although the terms first, second, etc. are used herein to refer to various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first interface and a second interface, etc. are distinguished from each other. Also, as used herein, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", when used herein, specify the presence of stated features, steps, operations, elements, modules, items, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, modules, items, components, and / or groups thereof. As used herein, the terms "or" and "and / or" are construed to be inclusive, or mean one and any combination of the items. Thus, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition are only possible when items, functions, steps or operations are inherently mutually exclusive between some versions and not others.

[0036] The professional terms used herein are used only to refer to specific embodiments, and are not intended to limit the present disclosure. The singular form used herein, unless the context clearly indicates otherwise, also includes the plural form. The meaning of "include" used in the specification is to specify a certain characteristic, region, integer, step, operation, element and / or component, and is not to exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0037] Although not differently defined, all terms used herein including technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Terms defined in commonly used dictionaries are to be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0038] In battery-based energy storage power stations, the battery itself is the core energy storage device, and its cost, along with the control and management (and related R&D) costs, are the primary considerations for establishing such stations. Using entirely new batteries in energy storage power stations increases both the battery cost and the cost of either having the battery manufacturer rebuild the control and management system (such as an Energy Management System, EMS) or developing one in-house. Furthermore, it is detrimental to environmental protection.

[0039] Considering that vehicle manufacturers' sales are not as high as expected due to model iterations, each model will have many spare battery packs and inventory battery packs. These battery packs require a high-standard warehouse and professional personnel for maintenance and charging, which is an additional cost for the OEMs. These battery packs were not cheap when purchased, and selling them at depreciation would result in significant losses, making it not worthwhile.

[0040] In view of this, the applicant has developed an energy storage system based on the needs of this scenario to extend the value of the battery pack throughout its entire life cycle.

[0041] This disclosure provides an energy storage system and an energy storage power station. The energy storage system can utilize original vehicle battery packs such as spare battery packs, inventory battery packs, old batteries, and even retired battery packs to construct energy storage units. It utilizes the OEM's extra batteries, solves the OEM's maintenance cost problem for extra battery packs, and is more environmentally friendly. Furthermore, it provides a matching energy management system to achieve charging and discharging control, so as to effectively store and release new energy, effectively support the consumption of new energy and the guarantee of power supply, achieving multiple benefits.

[0042] like Figure 1 The diagram shows a schematic representation of the electrical connection structure of the energy storage system in an embodiment of this disclosure.

[0043] exist Figure 1 The energy storage system 100 includes: an energy storage unit 110, an energy storage converter unit 120, and an energy management system (EMS).

[0044] The energy storage unit 110 includes at least one original vehicle battery pack 111 for new energy vehicles. As an example, the original vehicle battery pack 111 can be one or more of ternary lithium batteries, lithium iron phosphate batteries, sodium-ion batteries, lead-acid batteries, solid-state batteries, etc. In some embodiments, the energy storage unit 110 includes multiple original vehicle battery packs 111, which can constitute one or more battery clusters. In some embodiments, each original vehicle battery pack 111 can be independently packaged. In some embodiments, each original vehicle battery pack 111 may include a battery management system 1111 (BMS).

[0045] The original vehicle battery pack 111 can be a used spare battery pack, a stock battery pack, an old battery, or even a retired battery pack, etc. (or a brand new battery pack). No disassembly is performed, and the original structure is not damaged. In some embodiments, the original vehicle battery pack 111 can integrate existing high-voltage power distribution boxes, BMSs, external connectors, liquid cooling plates, etc. Other units are arranged around the energy storage unit 110, so that a complete energy storage system 100 can be quickly and efficiently constructed at low cost.

[0046] In some embodiments, the battery in the energy storage working environment has a much better running state than in the actual running state of the vehicle, which can effectively prolong the service life of the original vehicle battery pack 111. The common charging and discharging rate of the vehicle is 2C, that is, the ratio of battery capacity to charging and discharging current is 2, but in the energy storage working environment, the charging and discharging rate of the original vehicle battery pack 111 is not higher than 0.5C, which is much lower than 2C, and the use environment temperature is stable, without the vibration and impact of vehicle movement, etc. Therefore, the old or retired original vehicle battery pack 111 can also have a longer service life in the energy storage working environment. Therefore, in the embodiments of the present disclosure, the old or retired original vehicle battery pack 111 is used to construct the energy storage system 100, which not only reduces the cost but also has better service quality and reliability, and has very high commercial value and environmental value.

[0047] In some embodiments, based on the more stringent reference standard, the battery health state (State of Health, SoH) can be used to select the battery pack with better health state from the recycled old battery or retired battery to construct the energy storage unit 110. For example, the battery pack with SoH above 90% is preferentially selected to construct the energy storage unit 110.

[0048] In some embodiments, the BMS inherent in the original vehicle battery pack 111 can have measurement function, fault alarm function, protection function, self-diagnosis function, and balancing function. In the embodiments of the present disclosure, the functions can be retained and play a role through the path of information and control instruction interaction between the EMS and the BMS.

[0049] The energy storage converter unit 120 includes an energy storage DC-DC converter 121 and an energy storage converter 122 (Power Conversion System, PCS). The energy storage DC-DC converter 121 and the energy storage converter 122 (Power Conversion System, PCS) are both bidirectional to adapt to the charging and discharging of the original vehicle battery pack 111.

[0050] In some embodiments, the energy storage DC-DC converter 121 corresponds one-to-one with each original vehicle battery pack 111, and is connected to each original vehicle battery pack 111 to convert the output voltage of the positive and negative terminals of each original vehicle battery pack 111 from DC to DC, and then lead them to the positive and negative lines of the DC bus, respectively. In some embodiments, a DC switching unit 140 is provided between each original vehicle battery pack 111 and the corresponding connected energy storage DC-DC converter 121. As an example, the DC switching unit 140 can be implemented as a DC circuit breaker. The DC switching unit 140 can automatically disconnect when the current in its line reaches a certain value, thereby forming a protection. For example, it can disconnect when the current flowing into or out of the original vehicle battery pack 111 is too large, to protect the original vehicle battery pack 111 or the devices powered by the original vehicle battery pack 111. In some embodiments, the low-voltage side voltage of the energy storage DC-DC converter 121 (i.e., the side connected to the energy storage unit 110) is, for example, a DC voltage of 200V to 800V, typically 400V, wherein the lower limit of the low voltage can be extended, and the low-voltage side current is -125A to +125A. The high-voltage side voltage (i.e., the other side of the energy storage DC-DC converter 121) is, for example, a DC voltage of 650V to 880V, and the high-voltage side current is, for example, -75A to 75A. That is, when the energy storage unit 110 is charging, it may be charged from the high-voltage side to the low-voltage side by step-down charging, and when the energy storage unit 110 is discharging, the energy storage DC-DC converter 121 may boost the output voltage of the energy storage unit 110 before outputting it. In some embodiments, the DC-DC converter has a communication port, such as CAN or RS485, which can be connected to an external source to receive external control and output data.

[0051] In some embodiments, the energy storage converter 122 includes a DC terminal and an AC terminal electrically connected to the at least one energy storage DC-DC converter 121, for converting between DC voltage and AC voltage. In some embodiments, the energy storage converter 122 can be implemented as a bidirectional inverter. When the energy storage unit 110 is discharging, the output DC voltage from the DC terminal of the energy storage unit 110 can be inverted into an AC voltage and output at the AC terminal; or when the energy storage unit 110 is charging, the input AC voltage from the AC terminal can be converted into a DC voltage and output to the energy storage unit 110 at the DC terminal.

[0052] Figure 2The diagram schematically illustrates the structure of the energy storage converter 122, including three pairs of transistors connected to the three-phase four-wire system (phase A, B, C and neutral N). Each pair of transistors includes Q1, Q2 (or Q6), Q3 (or Q5), and Q4. Q1 to Q6 are MOS transistors, with Q1 and Q2 (or Q6) being NMOS transistors. Their drains and sources are connected to form a first connection point, which is connected to one of the three phases A, B, or C. Q3 and Q5 are PMOS transistors connected to the NMOS transistor Q4 via a common drain. The source of Q4 is connected to the first connection point, and the sources of Q3 and Q5 are connected to the neutral line. It also includes capacitors C1, C2, and C3. C1 and C2 are connected in series and in parallel with C3, and also in parallel with Q1 and Q2. The second connection point between C1 and C2 is connected to the N line. A bypass unit can be provided in the C3 branch. The bypass unit includes: a direct connection line with a first switching element; and a resistor branch line connected in parallel with the direct connection line and connected in series with a second switching element and a resistor R. By switching the first switching element and the second switching element, it can be selected to connect to R to form an RC circuit, or to bypass R.

[0053] In some embodiments, the energy storage converter 122 may include multiple PCS modules, and the output power of the energy storage converter 122 is the sum of the output power of the multiple PCS modules. For example, the energy storage converter 122 may include five 100kW PCS modules, and the output power of the energy storage converter 122 is 500kW. In some embodiments, the energy storage converter 122 may have at least one of the following functions: short circuit protection, reverse polarity protection, DC over / under voltage protection, off-grid overcurrent protection, over-temperature protection, AC input phase sequence error protection, communication fault protection, cooling system fault protection, and anti-islanding protection.

[0054] In a grid connection scenario, a 380V low-voltage grid connection can be selected, connecting to the user's 380V low-voltage distribution cabinet. The energy storage unit 110 is connected to the PCS after passing through the DC-DC converters 121 and DC bus 123. After being converted by the PCS, the output voltage is 380V, which is then connected to the user's 380V low-voltage bus via the low-voltage distribution cabinet.

[0055] The energy storage system 100 also includes an AC bus 160, electrically connected to the AC terminal of the energy storage converter 122 and connected to the external power grid. In some embodiments, the AC bus 160 can be connected to the external power grid via an AC switch unit 150 for controlling the connection and disconnection with the external power grid. The AC switch unit 150 can be implemented as an AC circuit breaker, disconnecting the AC bus 160 from the external power grid when the current / voltage reaches the disconnection standard, thereby providing protection. In some embodiments, an AC switch unit 150 can also be provided in each of the power supply branches of the AC bus 160 connecting to each electrical device (e.g., liquid-cooled air conditioning unit 180, fire protection system 190, lighting components 1000, EMS, and other controllers in each energy storage system 100), which can be implemented as an AC circuit breaker to protect each electrical device.

[0056] like Figure 9 As shown, the external power grid provides a main line, and various loads can be connected in parallel to this main line to obtain power. The loads may include the energy storage system 100 and other external loads 900. In a certain power consumption scenario, such as a user's factory, there are various industrial equipment and other external loads, as well as the energy storage system 100. When connected to the external power grid, the industrial equipment and the energy storage system 100 can receive power, and the energy storage system 100 can be charged. Alternatively, the energy storage system 100 can also discharge to power the industrial equipment in this power consumption scenario.

[0057] Back Figure 1 In some embodiments, the energy storage converter unit 120 may further include a transformer 1020 connected between the energy storage converter 122 and the AC bus 160 for transforming the AC voltage transmitted between the energy storage converter 122 and the AC bus 160 to the required voltage value.

[0058] It should be noted that although the structure of the energy storage converter unit 120 shown in the illustrated embodiment is such that each original vehicle battery pack 111 is connected to the DC bus 123 (busbar) via its corresponding energy storage DC-DC converter 121, and then the current is collected by the DC bus 123 and connected to one energy storage converter 122, in other embodiments, the structure of the energy storage converter unit 120 can also be such that each original vehicle battery pack is connected in parallel to each other via an energy storage DC-DC converter 121 and an energy storage converter 122 to form a collection on the AC bus. This structure of the energy storage converter unit 120 also falls within the protection scope of this application.

[0059] The energy management system 130 is communicatively connected to the battery management system 1111 and the energy storage converter 120 to collect their operating parameters and send control commands to control the charging and discharging of the energy storage unit 110. The energy management system 130 is communicatively connected to each of the battery management systems 1111 via adapters that can convert its preset communication interface (e.g., Ethernet or USB) to a CAN communication interface. The adapters can be, for example, CANFD devices that convert Ethernet to CAN. As an example, the energy management system 130 can obtain more output interfaces through Ethernet gateway devices to communicate with other devices.

[0060] You can refer to this. Figure 3 The diagram shows the communication connection structure between the energy management system 130 and other components.

[0061] exist Figure 3 In this embodiment, the energy management system 130 is configured as a physical device with multiple Ethernet ports for external communication and communication with other components via the TCP / IP protocol. Specifically, the energy management system 130 includes a first Ethernet port, which connects to the fifth Ethernet port of a first gateway T1. The first gateway T1 can be implemented as a switch. The sixth, seventh, and eighth Ethernet ports of the first gateway T1 are respectively connected to the BMS of multiple original vehicle battery packs via CANFD devices T1, T2, and T3.

[0062] The energy management system 130 can also communicate with the energy storage converter 122 via the ninth Ethernet port on the first gateway T1. Alternatively, the energy management system 130 can also communicate with the energy storage DC-DC converter 121 via other Ethernet ports on the first gateway T1 or its own Ethernet ports. Or, the communication interface of the energy storage DC-DC converter 121 can be converted by a converter and then connected to other communication interfaces (e.g., USB interfaces) of the energy management system 130. These implementation methods are flexible and not limited.

[0063] Optionally, the tenth Ethernet port on the first gateway T1 can be connected to a water-cooled air conditioning unit, and the eleventh Ethernet port on the first gateway can be connected to a PLC. Optionally, the second Ethernet port of the EMS can be connected to a second gateway T5, and the second gateway T5 can be implemented as a router. The router can be a wired or wireless router, used for communication with a remote end via the external Internet. Optionally, the remote end can be implemented as a cloud platform monitoring system 200.

[0064] To obtain battery operating parameters from the battery management system 1111 of the original vehicle battery pack 111 for monitoring and to control the charging and discharging of the battery management system 1111, the energy management system 130 can simulate the operating environment of the original vehicle battery pack 111 in a real vehicle by running a program. This allows it to obtain battery operating parameters from the battery management system 1111 in real time and control charging and discharging. Specifically, the energy management system 130 has a logic simulation function for the entire vehicle ECU node, thereby simulating the operating environment of the original vehicle battery pack 111 in a real vehicle environment without requiring any modification to the software of the original vehicle battery pack 111.

[0065] For example, the system simulates the vehicle CAN bus communication environment required by the BMS and captures the CAN bus data generated during the communication process of the original vehicle battery pack 111. It simulates the message information sent by nodes in the vehicle to the BMS, controls the BMS to enter various operating states, and responds to the messages sent by the BMS. In some embodiments, the energy management system can import the original vehicle BMSDBC file to communicate with the vehicle BMS and control charging and discharging to meet the energy scheduling strategy set by the system.

[0066] In an optional embodiment, the energy management system 130 can be housed in a control cabinet, which may include components such as an industrial computer, a programmable logic controller 1010 (PLC), an uninterruptible power supply (UPS), gateway devices (routers, switches), and a display screen.

[0067] In some embodiments, the UPS can be connected to the AC bus 160 and can supply power to the EMS, BMS, and fire protection components, ensuring that the EMS, BMS, and fire protection system 190 can operate normally for no less than a preset time, such as 30 to 60 minutes, in the event of a power outage.

[0068] In some embodiments, the software system running in the energy management system 130 can be developed based on a mature and stable development system (such as CentOS based on Linux, but not limited to this), which can fully utilize the software ecosystem provided by the development system. In some embodiments, the software system of the energy management system 130 can integrate a Javascript interpreter and UI rendering, supporting rapid updates to software logic and algorithms. After mutual verification with the programmable logic controller 1010 hardware, the energy management system 130 can still be controlled by the programmable logic controller 1010 to shut down equipment after system crashes or communication failures. For example, in addition to shutting down each DC switch unit 140 and AC switch unit 150 according to abnormal voltage and current in the line, the energy management system 130 can also be turned on / off by the programmable logic controller 1010. Therefore, when the energy management system 130 fails, the programmable logic controller 1010 can shut down a designated AC switch unit 150 to de-energize the corresponding equipment, thereby ensuring system safety.

[0069] The energy management system 130 can communicate with the original battery pack BMS via CANFD and has the function of importing and editing CAN DBC files from the original vehicle BMS. Therefore, it can read all battery operating parameters issued by the original vehicle battery pack 111's BMS, including at least one of the following: cell temperature, cell voltage, cell current, bus temperature, state of charge, health, battery energy / power adjustable depth, fault level, high-voltage interlock information, and communication status, enabling real-time monitoring of the original vehicle battery pack 111. Through logic algorithms, it can control the main relay in the original vehicle battery pack 111 to achieve charging and discharging functions.

[0070] In some embodiments, the energy management system 130 obtains the operating parameters of the energy storage converter 120 through communication with the energy storage converter 120. The operating parameters of the energy storage converter 120 include at least one of the following: DC voltage, DC current, DC power, AC voltage, AC current, converter internal temperature, clock, frequency, power factor, current input power, current output power, cumulative input power, and cumulative output power.

[0071] In some embodiments, the energy management system 130 has a battery doctor algorithm that can predict the trend of various parameters of the battery cell based on changes in the cell's health. For example, it can determine the rate of deterioration of the cell's health based on the maximum capacity and the rate of change of the slope of the decline in health.

[0072] In some embodiments, in order to expand the types of BMS supported, the EMS may also reserve extended communication interfaces for data interoperability with the EMS monitoring systems of other vehicle manufacturers, such as extended communication interfaces supporting multiple communication protocols such as MODBUS, DL / T 860, DL / T634.5104 and DL / T 634.5101.

[0073] In some embodiments, see Figure 1 and Figure 3 As shown, the energy storage system 100 may further include a smart meter unit 170, electrically connected to the AC bus 160 to collect power parameters, and communicatively connected to the energy management system 130 to transmit the power parameter signals. Figure 3 In the example, the smart meter unit 170 can be directly connected to a communication interface of the EMS, such as an RS485 interface. In some embodiments, the smart meter unit 170 can use a bidirectional high-precision smart meter capable of measuring all common power parameters, such as three-phase current, voltage, active and reactive power, electricity consumption and harmonics, the amount of electricity charged from the external grid to the energy storage system 100, and the amount of electricity discharged from the energy storage system 100 to the external grid. It also has comprehensive communication functions for communicating with the EMS. In some embodiments, the smart meter unit 170 can have a display interface that can display the amount of electricity charged from the external grid to the energy storage system and the amount of electricity discharged from the energy storage system to the external grid.

[0074] Optionally, the energy storage system 100 may further include an auxiliary subsystem, which may include at least one auxiliary functional unit. The auxiliary functional unit may, for example, be a liquid-cooled air conditioning unit 180, a fire protection system 190, or a lighting assembly 1000.

[0075] The liquid-cooled air conditioning unit 180 is electrically connected to the AC bus 160 to obtain power, and is communicatively coupled to the energy management system 130, outputting the operating parameters of the liquid-cooled air conditioning unit 180 and receiving control commands. In some embodiments, the operating parameters of the liquid-cooled air conditioning unit 180 include at least one of the following: ambient temperature, flow rate, inlet and outlet temperatures, and alarm information.

[0076] In some embodiments, the liquid-cooled air conditioning unit 180 includes a liquid chiller and an external piping system. As an example, the liquid chiller mainly comprises three modules: a refrigeration circuit, a coolant circuit, and an electronic control system. The refrigeration circuit mainly includes components such as a compressor, fan, condenser, plate heat exchanger, expansion valve, high-pressure detector, and high / low-pressure switches. The coolant circuit consists of components such as a water pump, water tank, flow detector, and temperature-sensitive fire detector; the coolant can be water or other types of coolant, not limited to water. The electronic control system mainly includes a controller, frequency converter, circuit breaker, contactor, and relay. As an example, the external piping system mainly includes connecting pipes, fan coil units, and a water distribution assembly, wherein the water distribution assembly may include ball valves, automatic vent valves, and connecting pipes. This external piping system can be functionally matched with the liquid chiller to meet the thermal management requirements of the original vehicle battery pack 111 in the energy storage unit 110.

[0077] During temperature regulation, the refrigeration circuit and coolant circuit exchange heat through a plate heat exchanger to maintain the water tank temperature within the set temperature range. The water pump supplies coolant to the original vehicle battery pack 111 and the fan coil unit, while simultaneously controlling the temperature of the original vehicle battery pack 111 and the ambient temperature to ensure operation within a suitable temperature range.

[0078] During operation, the cell temperature of the energy storage system 100 can be controlled at 25℃±3℃. Additionally, the temperature of the energy storage system 100 can be regulated by a coil fan. Optionally, the coil fan also has a dehumidification function.

[0079] The energy storage system 100 is typically placed outdoors, usually within a container 300, such as a shipping container. Therefore, the operating environment is often harsh. Consequently, the liquid-cooled air conditioning unit 180 can function as both a cooling and heating unit to regulate the operating temperature of the original vehicle battery pack 111. The cooling function of the liquid-cooled air conditioning unit 180 effectively cools the original vehicle battery pack 111, effectively solving problems such as thermal runaway, severe battery capacity degradation, and reduced product lifespan caused by excessively high temperatures inside the container during charging and discharging. Furthermore, the heating function of the liquid-cooled air conditioning unit 180 effectively solves the problem of the original vehicle battery pack 111 failing to start in cold regions, ensuring normal startup and efficient operation within a suitable temperature range. It also effectively addresses the problem of excessively low temperatures inside the container during winter.

[0080] In some embodiments, the fire protection system 190 is electrically connected to the AC bus 160 to obtain power, communicatively coupled to and controlled by the energy management system 130, outputting operating parameters of the fire protection system 190 and receiving control commands. In some embodiments, the fire protection system 190 can perform one or more fire-fighting actions such as fire alarm, ventilation and explosion protection, fire extinguishing agent spraying, and even water extinguishing. The operating parameters of the fire protection system 190 may include at least one of the following: alarm information and gas injection signal.

[0081] In some embodiments, the lighting component 1000 is electrically connected to the AC bus 160 to obtain power. The lighting component 1000 may include one or more of lighting fixtures, indicator lights, etc.

[0082] In some embodiments, the energy storage system 100 further includes a plurality of data collectors (not shown) and a data acquisition module (not shown). The plurality of data collectors are respectively disposed in connection with the AC bus 160 and each of its power supply branches, and are used to collect power supply data, such as voltage and current, of the AC bus 160 and its power supply branches. The power supply branches may include power supply branches connecting each auxiliary functional unit and the energy storage converter 122. In some embodiments, each power supply branch and the AC bus 160 may also be provided with an AC switch unit 150, which may be implemented as an AC circuit breaker, etc. The data acquisition module is communicatively connected to the plurality of data collectors and the energy management system 130, and is used to collect the power supply data and transmit it to the energy management system 130.

[0083] exist Figure 1 The energy management system 130 in this embodiment can also be used to control the charging and discharging of the energy storage unit 110 based on an energy dispatch strategy. The energy dispatch strategy includes at least one of the following: peak shaving and valley filling, reverse current prevention and power limiting support, transformer capacity protection, and demand setting protection.

[0084] Peak shaving and valley filling refers to charging the energy storage unit 110 according to the local electricity price's off-peak and off-peak periods, and discharging during peak periods. Specifically, it charges and discharges according to a set time, discharging during peak electricity price periods and charging during off-peak and off-peak electricity price periods.

[0085] Backflow prevention and power limitation support refer to the mechanism where, when power consumption is restricted by the power grid, the energy storage unit 110 discharges according to the power requirements of the external load connected in parallel with the energy storage system 100 to the external power grid. Furthermore, when the discharge power of the energy storage system 100 exceeds the load power of the external load, backflow from the energy storage system 100 to the external power grid is restricted. Specifically, when power consumption is limited (i.e., the power grid restricts the power consumption of electrical equipment), the energy storage unit 110 discharges according to the power requirements and the power load. The energy storage system 100 does not discharge upstream of the grid connection point. A meter with communication capabilities and the ability to transmit active power can be installed on the main incoming line side of the grid connection point.

[0086] Transformer capacity protection. The energy storage unit is coupled to an AC bus via an energy storage converter unit. A transformer is installed in the AC bus or the line between the AC bus and the energy storage converter; the sum of the load power of the loads connected to the output side of the transformer is less than the rated capacity of the transformer. For example, in Figure 1 In this embodiment, the energy storage converter 122 can be electrically connected to the AC bus 160 via a transformer 1020. When the energy storage unit 110 is charging, the output side of the transformer 1020 is the first side connected to the energy storage converter 120, and the connected loads are internal loads such as the energy storage converter 120 and the energy storage unit 110. Therefore, the sum of the charging power to each energy storage unit 110 is limited to be less than the rated capacity of the transformer 1020. Furthermore, when the energy storage unit 110 is discharging and connected to the external power grid, the output side of the transformer 1020 is the second side connected to the AC bus, and the connected loads are internal loads such as the liquid-cooled air conditioning unit 180. In grid-connected mode, external loads from the external power grid are also included. Therefore, the sum of the load power of the connected internal loads, or the load power of the internal and external loads, can be limited to be less than the rated capacity of the transformer 1020, thereby protecting the transformer. The energy management system 130 can track the load power of the energy storage system 100 through communication with the transformer 1020 or through a data acquisition module to obtain the real-time load power.

[0087] In another embodiment, the transformer may also be located in the AC bus 160, for example, between the AC bus 160 and the grid connection point with the external power grid and the connection points with each auxiliary functional unit (e.g. Figure 1 If the entire energy storage system is powered by an external power grid (position B), then the output side of the transformer is the side that supplies power to the internal loads of each auxiliary functional unit, energy storage unit 110, etc., and the sum of the load power of each internal load is limited to less than the rated capacity of the transformer.

[0088] Demand setting protection refers to limiting the power supply (i.e., charging) obtained by the energy storage system 100 to a level lower than the difference between the set demand and the load power of the external load in the power consumption scenario, based on the set demand of a set power consumption scenario. When the load power of the external load exceeds the set demand, charging of the energy storage unit 110 is stopped to ensure power supply to the external load in the power consumption scenario. The EMS can track the load power output of the entire energy storage system to the external power grid.

[0089] It is understandable that the power regulation and output in the above energy dispatch strategy can be achieved by the energy management system 130 controlling and regulating the output power of the energy storage converter unit 120.

[0090] In some embodiments, the energy management system 130 is communicatively connected to the cloud platform monitoring system 200, and the communication connection method is as follows: Figure 3 As shown, the energy storage system 100 sends its operating status data to the cloud platform monitoring system 200 for display. The energy management system 130 can also receive remote control commands from the cloud platform monitoring system 200 and execute corresponding control actions. In some embodiments, the data displayed by the cloud platform monitoring system 200 includes at least one of the following: real-time tracking of changing battery operating parameters of the energy storage unit 110; operating parameters of the energy storage converter unit 120; energy storage system 100 management; user management; alarm management; and revenue management.

[0091] In optional examples, the cloud platform monitoring system 200 has remote terminal monitoring capabilities (which can be a fixed terminal or a mobile terminal), a user-friendly interface, and can be connected to a monitor or large screen for demonstration purposes. The cloud platform monitoring system 200 can detect and remotely control the operation of the energy storage system in real time, set operating strategies (such as the aforementioned energy dispatch strategies and fire suppression strategies), and can also study distributed data acquisition technology and integrate multi-system, multi-protocol communication. In some examples, all data on the EMS can be transmitted to the remote cloud platform monitoring system 200 via a wireless router using the TCP / IP protocol, enabling mobile terminals (such as mobile phones), browsers, computers, and other terminals to perform online detection and remote monitoring of the energy storage system 100 through the cloud platform monitoring system.

[0092] In an optional example, the user can view the operating parameters of the energy storage unit 110 through the cloud platform monitoring system 200, such as cell voltage, temperature, current, SOC, SOH, and the adjustable depth of the battery system's energy / power. Another example is the battery status display: communication status, main relay status, SOC, SOH, fault level, and high-voltage interlock information. In another optional example, the user can view the operating parameters of the energy storage converter unit 120, such as DC voltage, DC current, DC power, AC voltage, AC current, converter internal temperature, clock, frequency, power factor, current output (input) power, cumulative input power, and cumulative output power.

[0093] The cloud platform monitoring system 200 can set and adjust the operating status and mode of the battery energy storage system, such as data display, collection, and uploading.

[0094] Based on the above embodiments, a battery management method for the energy management system 130 is provided. This method can be used in conjunction with other methods. Figure 4A and Figure 4B .like Figure 4A The diagram shown illustrates a flowchart of the battery management method of the energy management system in an embodiment of this disclosure. Figure 4B As shown, the display Figure 4A A schematic diagram illustrating the principle of the battery management method.

[0095] like Figure 4A The battery management method described herein includes:

[0096] Step S401: The energy management system and the battery management system form a communication line connection.

[0097] For reference Figure 4B For example, the energy management system can establish a communication connection with the battery management system through an adapter T with a preset CAN interface. As a further example, the adapter T can be a CANFD device that converts an Ethernet port to CAN.

[0098] For example, such as Figure 3 As shown, the energy management system has an Ethernet port and can connect to each CANDFD device T2, T3, and T4 through a first gateway.

[0099] Step S402: The energy management system simulates the original vehicle battery pack in the actual vehicle operating environment and communicates with the battery management system to obtain the battery operating parameters of the original vehicle battery pack in real time from the battery management system, and performs charging and discharging of the energy storage unit through the energy storage converter based on the energy scheduling strategy.

[0100] In some embodiments, reference may be made to Figure 4BThe energy management system 130 can import the original vehicle BMS DBC file 131 to simulate the vehicle CAN bus communication environment 132 required by the battery management system 1111, and capture the CAN bus communication data generated during the communication process of the original vehicle battery pack 111. Through the vehicle CAN bus communication environment, it simulates the message information sent by nodes in the vehicle to the BMS, controls the BMS to enter various working states, and responds to the messages sent by the BMS. This enables communication with the vehicle BMS and controls charging and discharging to meet the energy scheduling strategy set by the system.

[0101] In some embodiments, the energy management system 130 is communicatively connected to the programmable logic controller 1010 to control the on / off state of the AC switching unit and the DC switching unit via the PLC to form a power supply, and to automatically shut down in the event of a fault in the energy management system 130 to form a protection.

[0102] In some embodiments, the battery management system 1111 and energy management system 130 can monitor the safety of multiple levels of operating states, from small to large. Specifically, the battery management system 1111 is used to detect the operating parameters and battery pack temperature of each cell in the original vehicle battery pack in real time and transmit them to the energy management system 130 and energy storage inverter 122 in real time to limit each cell to a safe operating state. That is, the BMS can monitor and control the safe operating state of the cells in real time. For example, the energy management system 130 is used to detect the operating parameters of the battery management system 1111 and energy storage inverter 122 in real time, and determine whether the energy storage system is operating under normal conditions based on the operating parameters transmitted by the battery management system 1111 and energy storage inverter 122; if not, it disconnects from the external power grid, isolates the energy storage inverter 122 from the energy storage unit, and isolates the battery packs in the energy storage unit 110 from each other. That is, the EMS can monitor and control the safe operating state of the energy storage system 100 in real time. For example, the energy storage converter 122 can detect the operating parameters of the energy storage unit 110 in real time, limiting the energy storage unit to a safe operating state within the safe operating range. That is, the PCS can monitor and control the safe operating state of the energy storage unit 110 in real time.

[0103] In some embodiments, the energy management system is used to control the charging and discharging of the energy storage unit based on an energy dispatch strategy; the energy dispatch strategy includes at least one of the previously described strategies: peak shaving and valley filling, reverse current prevention and power limiting support, transformer capacity protection, and demand setting protection, etc. These will not be repeated here.

[0104] In some embodiments, the energy management system sends the operating status data of the energy storage system to the cloud platform monitoring system for display; or, it receives remote control commands from the user issued by the cloud platform monitoring system and executes the corresponding control actions.

[0105] like Figure 5 The diagram shown illustrates the mechanical structure of the energy storage system 100 in this embodiment of the present disclosure.

[0106] exist Figure 5 In this configuration, the energy storage system 100 is housed within a container 300, which can be implemented as a shipping container. To facilitate observation of the internal equipment distribution within the container 300, Figure 5 The side panels of the housing 300 are omitted. The housing 300 includes a battery compartment 310 and an electrical compartment 320. Multiple battery units 112 contained in the energy storage unit 110 are stacked in the battery compartment 310. Each battery unit 112 includes one or more original vehicle battery packs 111. The multiple battery units 112 in the energy storage unit 110 can be stacked in one or more columns, such as the two columns shown in the figure. The energy storage DC-DC converter 121, energy storage inverter unit 120, AC bus 160, energy management system 130, etc., are located in the electrical compartment 320. As an example, a distribution cabinet can be installed in the electrical compartment 320, and the AC bus 160 and its power supply branches connecting various auxiliary functional units, EMS, etc., as well as each AC switch unit 150 in the AC bus 160 and power supply branches, etc., can be located in the distribution cabinet. As an example, the smart meter unit can be located in the distribution cabinet. A control cabinet can be installed, powered by one power supply branch. The energy management system 130, the first gateway (T1), the router (T5), and their power supply circuits are located in the control cabinet. The power supply circuit can be a switching power supply, used to convert the AC voltage (e.g., 220V) provided by the power supply branch line into a working voltage suitable for the control cabinet (e.g., 12V, 24V, etc.). As an example, the liquid-cooled air conditioning unit 180 can also be located in the electrical compartment 320.

[0107] like Figure 6 The diagram shows the layout structure of the fire protection system in an embodiment of this disclosure.

[0108] The enclosure 300 is equipped with a fire protection system 190. The fire protection system 190 includes a fire detection and alarm component 191 and a fire extinguishing component 192. Specifically, the fire detection and alarm component 191 includes a detection unit 1911, an alarm unit 1912, and a fire control unit 1913 that is communicatively connected to the detection unit 1911 and the alarm unit 1912.

[0109] In some embodiments, the alarm unit 1912 may include at least one of the following installed in the enclosure 300: an in-station audible and visual alarm, a gas release alarm (or an indicator light), or an alarm bell. Optionally, the alarm unit 1912 may also include an external audible and visual alarm, a gas release alarm, or other alarm located outside the enclosure 300 for alarm notification. The alarm unit 1912 may be controlled by the fire control unit 1913, or it may be connected to a manual alarm button for manual alarm activation by the user.

[0110] In some embodiments, the detection unit 1911 includes a compartment-level detection component and a battery cell-level detection component. The battery cell-level detection component includes a composite fire detector 19111 for detecting combustible gas and temperature, provided for each battery cell 112. As an example, the composite fire detector 19111 may be provided on each battery cell 112, for example, located on the surface of the battery cell 112.

[0111] The compartment-level detection assembly includes a preset number of heat detectors 19112, combustible gas detectors 19113, and smoke detectors 19114. The detectors in the compartment-level detection assembly can be distributed in the battery compartment 310 or the battery compartment 310 and the electrical compartment 320, and can be installed at the top. Figure 6 In this embodiment, the compartment-level detection assembly may include a set of two heat-sensitive fire detectors 19112. These are disposed on one side of the top of the battery compartment 310. A set of heat-sensitive fire detectors 19112 and a smoke detector 19114 are disposed on the top of the other side. A combustible gas detector 19113 is disposed on the top between the two side areas; the combustible gas detector 19113 may be a combined gas detector for hydrogen (H2) and carbon monoxide (CO). Optionally, a set of heat-sensitive fire detectors 19112 and smoke detectors 19114 may also be disposed on the top of the electrical compartment 320 to detect fires spreading into the electrical compartment 320.

[0112] The fire extinguishing component 192 is communicatively connected to and controlled by the fire control unit 1913, so as to perform fire extinguishing actions under the control of the fire control unit 1913. In some embodiments, the fire extinguishing component 192 includes an exhaust unit 1921, a fire extinguishing agent spraying component 1922, and a water injection component 1923.

[0113] The exhaust unit 1921 connects the battery compartment 310 to the outside and is used to vent air from the battery compartment 310 to prevent explosion. In some embodiments, the exhaust unit 1921 may include a fan, and an air inlet and an air outlet (which may also include louvers) disposed on the side wall of the housing 300 and connecting the battery compartment 310. The fan may be disposed in the flow channel between the air inlet and the air outlet, for example, at the air outlet. The exhaust unit 1921 may be connected to and controlled by the fire control unit 1913. Optionally, the fan may also have a manual fan switch, allowing the user to manually start and stop the fan.

[0114] The spray nozzle of the fire extinguishing agent spraying assembly 1922 is connected to the battery unit 112. Figure 6 In this embodiment, the fire extinguishing agent spraying assembly 1922 includes a fire extinguishing agent spraying device 19221, a fire extinguishing agent main pipe 19222, and various fire extinguishing agent branch pipes 19223. Optionally, the fire extinguishing agent spraying device 19221 can be located in the electrical compartment 320 adjacent to the battery compartment 310. The fire extinguishing agent in the fire extinguishing agent spraying device 19221 can be perfluoroacetone. Compared with heptafluoropropane, perfluorohexanone has higher insulation strength, and after extinguishing an open flame, the concentration of perfluorohexanone can be maintained locally and through total flooding by intermittent spraying, which is beneficial for suppressing battery thermal runaway and thus achieving continuous suppression of reignition. Perfluorohexanone is a liquid at room temperature and can be safely transported and stored in ordinary containers under normal pressure, which meets the performance requirements of the regulations that recommend configuring a separate fire extinguishing medium nozzle for each battery unit 112. Perfluorohexanone (PFH) has a zero ODP (ozone depletion potential), low GWP, and an atmospheric residence time of 5 days, making it a high-performance, environmentally friendly refrigerant that is expected to replace other traditional fire extinguishing agents such as heptafluoropropane. The main fire extinguishing agent pipe 19222 is connected to the fire extinguishing agent spraying device 19221 and extends to the top of the battery compartment 310. Subsequently, the main fire extinguishing agent pipe 19222 extends downwards from the top of the battery compartment 310 at positions corresponding to each row of battery cells 112, with corresponding branch pipes 19223 connecting to each battery cell 112. Each branch pipe 19223 is connected to a zone valve 19224, used to control the on / off state of the branch pipe 19223, thereby controlling whether the branch pipe 19223 sprays or stops spraying fire extinguishing agent onto the corresponding battery cell 112. The zone valve 19224 is controllable by the fire control unit 1913.

[0115] The outlet of the water injection component 1923 is connected to the battery compartment 310. Figure 6The water injection assembly 1923, as shown, includes a water injection pipe 19231. The water injection pipe 19231 extends from the outside of the battery compartment 310 through a hole in the wall of the battery compartment 310 into the battery compartment 310, and its outlet is positioned near the top, above each of the battery cells 112. The water injection pipe 19231 has a valve outside the battery compartment 310, such as an electric ball valve 19232 that can be manually and electrically controlled, for controlling the water injection pipe 19231 to inject water into the battery compartment 310 for fire extinguishing. The electric ball valve 19232 is controllable by the fire control unit 1913. The water inlet of the water injection pipe 19231 outside the battery compartment 310 can be connected to a fire water source, such as a fire hydrant, via a fire water pipe. In some embodiments, the housing 300 can be located close to the fire water source for easy water injection. When gas fire suppression fails to control the spread of thermal runaway, fire-fighting water will be used to flood the entire compartment, immersing the thermally runaway original vehicle battery pack 111 in water to quickly control the fire.

[0116] In some embodiments, the fire control unit 1913 may have a fire-fighting strategy, which determines the severity of the fire alarm based on the detection data of the detection unit 1911, and issues a corresponding alarm through the alarm unit 1912. It may also select to activate the exhaust unit 1921, the fire extinguishing agent spraying assembly 1922, and the water injection assembly 1923 in the fire extinguishing assembly 192 according to the severity.

[0117] In some embodiments, such as Figure 7 As shown, the fire control unit 1913 may include a gas extinguishing controller 19131 and a water extinguishing controller 19132. The exhaust unit 1921's fan includes a fan controller, and the gas extinguishing controller 19131 is connected to and controls the fan controller to control the start and stop of the exhaust unit 1921. The gas extinguishing controller 19131 is connected to and controls the alarm unit 1912, and also connects to and controls the on / off state of the zone valve and the start and stop of the extinguishing agent spraying device 19221. The water extinguishing controller 19132 is communicatively connected to the gas extinguishing controller 19131, and connects to and controls the opening and closing of the electric ball valve 19232.

[0118] The fire protection strategy of the fire control unit 1913 in this embodiment can determine the severity of the fire alarm based on the following logic.

[0119] First, the fire control unit 1913, in response to a first fire alarm signal from any one of the detectors in the warehouse-level detection component and the battery unit-level detection component, activates the alarm unit 1912 to sound an alarm. Specifically, when any detector in the detection unit 1911 (which can be a detector from the warehouse-level detection component or a detector from the battery unit-level detection component) detects abnormal data or a manual fire alarm button press, it outputs the first fire alarm signal and reports it to the fire control unit 1913 (e.g., to the gas extinguishing controller 19131). If it is a combustible gas alarm (e.g., the combustible gas concentration reaches a threshold), it can be vented through the exhaust unit 1921 for explosion protection.

[0120] The fire control unit 1913 responds to a second fire alarm signal from any two detectors belonging to the same protected area, and then, after a preset delay, activates the fire extinguishing component 192 to perform a fire extinguishing action. The protected area of ​​a gas extinguishing system refers to a confined space that meets the requirements of a total flooding gas extinguishing system. Specifically, upon receiving a second linkage trigger signal, a second alarm signal indicating a more severe fire is generated and reported to the gas extinguishing controller 19131. The linkage trigger signal refers to the alarm signal from a detector belonging to the same protected area as the detector that generated the first-level alarm. When the fire control unit 1913 receives the second alarm signal, it controls the fire extinguishing device to activate after a delay (e.g., spraying after a 30-second countdown) to spray the extinguishing agent. In some embodiments, to avoid the airflow from the exhaust unit 1921 affecting the spraying of the extinguishing agent, the exhaust unit 1921 can be shut down and the fire extinguishing component 192 activated. If the battery unit 112 has a battery explosion-proof valve, the valve can also be opened.

[0121] Taking a battery cell-level detection component as an example, when a fire occurs, the composite fire detector 19111 of a certain battery cell 112 detects abnormal data, generating a first alarm signal and reporting it to the gas extinguishing controller 19131. The gas extinguishing controller 19131 then activates the fire alarm sound and light device outside the battery cell 112 to alert personnel. Subsequently, another composite fire detector 19111 also alarms, and the two composite fire detectors 19111 generate a second alarm signal. The fire control unit 1913 reports to the gas extinguishing controller 19131, which activates the zone valve of the extinguishing agent branch pipe 19223 corresponding to the battery cell 112 of the composite fire detector 19111, and activates the extinguishing agent spraying device 19221. The extinguishing agent is sprayed onto the corresponding battery cell 112 through the extinguishing agent branch pipe 19223 corresponding to the load detector that generated the abnormal alarm to extinguish the fire and cool it down.

[0122] After the fire extinguishing device is activated, the fire control unit 1913 can select further actions based on the feedback information from the activation of the fire extinguishing device. For example, if thermal runaway occurs after spraying, the water injection component 1923 needs to be activated (e.g., the water injection fire extinguishing controller 19132 is electrically activated or the ball valve 19232 is manually activated to inject water). In some embodiments, the feedback information may include data for determining whether the thermal runaway conditions are met, such as the continued high temperature after the fire extinguishing agent is sprayed. As an example, after receiving the fire extinguishing device activation signal, if the temperature measured by the heat detector reaches a first threshold (e.g., 80°C) and remains above it for more than a first duration (e.g., 10 minutes), or reaches a higher second threshold (e.g., 130°C) and remains above it for more than a shorter second duration (e.g., minutes), or if the heat detector or composite fire detector 19111 goes offline and the temperature remains high (e.g., reaches the first threshold) within a third duration (e.g., 10 minutes) before going offline, the water injection fire extinguishing controller 19132 will be triggered to start water injection. In addition, the water-filled fire extinguishing control unit can trigger higher-level alarms through the alarm unit 1912, such as coordinated alarms through the audible and visual alarms inside and outside the battery compartment 310, and the gas release indicator light.

[0123] Based on the above multi-level alarm fire protection strategy, a fire protection scheme of level 112 for battery unit and a corresponding fire protection scheme of level 310 for battery compartment and level 320 for electrical compartment can be realized.

[0124] The battery unit 112-level fire suppression system can automatically and independently extinguish fires in the original vehicle battery pack 111, featuring zoned operation, zoned sensing, and zoned activation. In the event of a fire, the composite fire detector 19111 generates a first alarm signal, reporting to the gas extinguishing controller 19131, which activates the audible and visual alarms to alert personnel in the protected area. Once two or more composite fire detectors 19111 issue second-level alarm signals, the battery explosion-proof valve of the abnormal battery pack on fire is directly opened, and the gas extinguishing controller 19131 is simultaneously notified to activate the fire extinguishing device. The extinguishing agent is sprayed into the abnormal battery pack via the extinguishing agent branch pipe 19223 to extinguish and cool the fire. The gas extinguishing controller 19131 sends a signal to the water injection fire extinguishing controller 19132 to activate the fire extinguishing device. The water injection fire extinguishing controller 19132 determines that thermal runaway conditions are met based on the detected temperature data and initiates water injection.

[0125] The warehouse-level fire protection plan is also implemented according to the three-level early warning system.

[0126] Level 1 Warning – If any detector within the enclosure 300 issues a first fire alarm, the fire control unit 1913 (such as the gas extinguishing control unit within it) will issue a warning via audible and visual alarms through the alarm unit 1912. If the combustible gas detector 19113 alarms, the exhaust unit 1921 will be activated. Other linkage logic, such as shunt trip signal output, fire alarm, and fault signal outputs, can be customized according to actual requirements.

[0127] Level 2 fire alarm – Upon receiving an alarm from another detector within the same protected area, i.e., when two or more detectors in the same protected area form a second fire alarm signal, the fire control unit 1913 (such as the gas extinguishing control unit within it) will send a linkage signal to shut down the fan and electric louvers, and then send a linkage trigger signal to the fire extinguishing device. After the 30-second delay trigger countdown of the fire extinguishing device ends, the fire extinguishing agent will be sprayed.

[0128] Level 3 fire alarm – When the fire control unit 1913 (such as the water injection fire extinguishing control unit within it) receives an activation feedback signal from the fire extinguishing device, it can issue an alarm notification through the in-station audible and visual alarm inside the enclosure 300, the external audible and visual alarm outside the enclosure 300, and the venting indicator light. If the conditions for thermal runaway are met, the fire control unit 1913 will activate ball valve 19232 to inject water for fire extinguishing.

[0129] like Figure 8 The diagram shown illustrates the structure of a computer device according to an embodiment of the present disclosure.

[0130] The computer device 700 includes a bus 701, a processor 702, and a memory 703. The processor 702 and the memory 703 can communicate via the bus 701. The memory 703 can store computer programs or instructions. The processor 702 implements the battery management method of the EMS in the previous embodiment by running the computer program or instructions in the memory 703, for example... Figure 4A .

[0131] Bus 701 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, although only one thick line is used in the diagram, this does not indicate that there is only one bus or one type of bus.

[0132] In some embodiments, processor 702 may be implemented as a central processing unit (CPU), microprocessor unit (MCU), system on chip (System on Chip), or field-programmable array (FPGA). Memory 703 may include volatile memory for temporary data storage during program execution, such as random access memory (RAM).

[0133] The memory 703 may also include non-volatile memory for data storage, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid-state disk (SSD).

[0134] In some embodiments, the computer device 700 may further include a communicator 704. The communicator 704 is used for communication with external devices. In specific examples, the communicator 704 may include one or more wired and / or wireless communication circuit modules. For example, the communicator 704 may include one or more of, for example, a wired network card, a USB module, a serial interface module, etc. The wireless communication protocols followed by the wireless communication module include, for example, Nearfield Communication (NFC) technology, Infrared (IR) technology, Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Time-Division Code Division Multiple Access (TD-SCDMA), Long Term Evolution (LTE), Bluetooth (BT), Global Navigation Satellite System (GNSS), etc.

[0135] This disclosure also provides a computer-readable storage medium storing a computer program or instructions, which, when executed, implement the battery management method described in the previous embodiments, such as... Figure 4A .

[0136] That is, the method steps in the above embodiments are implemented as software or computer code that can be stored in a recording medium (such as CD ROM, RAM, floppy disk, hard disk or magneto-optical disk), or implemented as computer code that is originally stored in a remote recording medium or a non-transitory machine-readable medium and will be stored in a local recording medium after being downloaded via a network, so that the method represented herein can be stored in such software processing on a recording medium using a general-purpose computer, a special processor or programmable or special hardware (such as ASIC or FPGA).

[0137] This disclosure may also provide a computer program product, one or more computer programs or instructions, which, when run, execute all or part of the battery management method described in this disclosure. The computer program product includes one or more computer programs or instructions.

[0138] Computer programs or instructions can be stored in a readable storage medium or transferred from one readable storage medium to another. For example, the computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The readable storage medium can be any available medium capable of access, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a digital video optical disc; or a semiconductor medium, such as a solid-state drive. The computer-readable storage medium can be a volatile or non-volatile storage medium, or it can include both volatile and non-volatile types of storage media.

[0139] In summary, this disclosure relates to new energy sources, providing a battery management method, an energy management system, and an energy storage system. The method includes: the energy management system and the battery management system forming a communication line connection; the energy management system simulating the original vehicle battery pack's operating environment in a real vehicle communicating and interacting with the battery management system to obtain real-time battery operating parameters from the battery management system, and performing charging and discharging of the energy storage unit through an energy storage converter based on an energy scheduling strategy. Therefore, by simulating the operating environment through the energy management system, an energy storage system can be constructed using redundant original vehicle battery packs, solving the maintenance cost problem of redundant original vehicle battery packs and effectively supporting the consumption of new energy sources and power supply security.

[0140] The above embodiments are merely illustrative of the principles and effects of this disclosure and are not intended to limit this disclosure. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this disclosure. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this disclosure should still be covered by the protection scope of this disclosure.

Claims

1. A battery management method, characterized by, The energy management system is applied to the energy storage system, the energy storage system includes an energy storage unit, the energy storage unit is constructed based on an original vehicle battery pack for a new energy vehicle, the original vehicle battery pack includes a battery management system, the energy storage unit is connected to an AC bus through an energy storage converter unit, the AC bus forms multiple power supply branches, the AC bus and the power supply branches are provided with AC switch units, the energy management system is communicatively connected to a programmable logic controller and is mutually verified, and the programmable logic controller is connected to each AC switch unit. The original vehicle battery pack is connected to the energy storage converter unit through a DC switch unit. The programmable logic controller is connected to each DC switch unit, and the method comprises the following steps: The energy management system is communicatively connected to the battery management system; The energy management system simulates the original vehicle battery pack in the actual vehicle operating environment, communicates with the battery management system, obtains the battery operating parameters of the original vehicle battery pack from the battery management system in real time, and performs charging and discharging of the energy storage unit through the energy storage converter unit based on an energy scheduling strategy; When the programmable logic controller verifies that the energy management system collapses or has a communication fault, the programmable logic controller takes over to control the turn-off of the specified DC switch unit and AC switch unit; in addition to being able to be turned off according to voltage and current abnormalities in the line, the DC switch unit and the AC switch unit can also be turned on / off by the energy management system through the programmable logic controller.

2. The battery management method of claim 1, wherein, The energy management system is communicatively connected to the battery management system through a CAN interface adapter of a preset communication interface.

3. The battery management method of claim 1, wherein, The battery operating parameters of the energy storage unit include at least one of the following: at least one of cell temperature, cell voltage, cell current, busbar temperature, state of charge, health degree, battery energy / power adjustable depth, fault level, high-voltage interlocking information, communication state and the like.

4. The battery management method of claim 1, wherein, Further comprising: The battery management system detects the operating parameters of each cell in the original vehicle battery pack and the battery pack temperature in real time, and limits the working conditions of the cells within the safe working area; The energy management system determines whether the energy storage system works under normal conditions based on the battery operating parameters obtained from the battery management system; if not, the energy storage system is disconnected from the external power grid.

5. The battery management method of claim 1, wherein, The energy management system is used to control the charging and discharging of the energy storage unit based on an energy scheduling strategy; the energy scheduling strategy includes at least one of the following: 1) allowing the energy storage unit to charge according to the valley and flat values of the local electricity price and discharge at the peak value; 2) when the power consumption scene of the energy storage system is limited to the power grid, allowing the energy storage unit to discharge according to the power requirement of the power consumption scene; when the discharge power is greater than the load power of the external load in the power consumption scene, limiting the reverse flow output of the energy storage unit to the upstream external power grid; 3) the energy storage unit is coupled to an AC bus through an energy storage converter unit; a transformer is arranged in the AC bus or between the AC bus and the energy storage converter; the sum of the load powers of the loads connected to the output side of the transformer is less than the rated capacity of the transformer. 4) based on the set demand of the power consumption scenario, limit the power supply of the energy storage system from the external power grid to be lower than the difference between the set demand and the load power of the external load in the power consumption scenario; and when the load power of the external load is greater than the set demand, stop charging the energy storage unit.

6. The battery management method of claim 1, wherein, The energy management system is in communication connection with a cloud platform monitoring system, and the battery management method comprises: The energy management system sends the running state data of the energy storage system to the cloud platform monitoring system for display; or receives a user remote control instruction issued by the cloud platform monitoring system and executes a corresponding control action.

7. An energy management system, characterized by Comprise: a communicator, a processor and a memory; The memory stores computer programs or instructions; The processor is used to run the computer programs or instructions to execute the battery management method as claimed in any one of claims 1 to 6.

8. An energy storage system characterized by, One or more energy management systems as claimed in any one of claims 1 to 7.

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