Battery management system and energy storage system

Abstract

The utility model discloses a battery management system and an energy storage system. The battery management system of the utility model comprises a centralized processor; and the functional module is configured to be directly connected with the centralized processor, and the centralized processor is configured to process signals transmitted by the functional module so as to control the energy storage system to work. According to the battery management system, the signals of the functional modules of the energy storage system are directly transmitted to the centralized processor instead of being uploaded layer by layer through a multi-stage control module, so that the time for uploading the signals can be shortened, the battery management system is simplified, the centralized processor can quickly respond to various signals of the functional modules, and the battery management efficiency is improved. The processing efficiency of the centralized processor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage system technical field more specifically, relate to a kind of battery management system and energy storage system. BACKGROUND

[0002] In existing energy storage system, a large amount of data needs to be calculated and processed, so the battery management system of the energy storage system will have multiple levels, including BMU (battery management unit), CMU (battery control unit), BSC (power system management), LC (local controller), EMS (energy management system) and the like. In related technologies, the controller in the battery management system of the energy storage system has low efficiency when processing various signals. SUMMARY

[0003] The utility model embodiment provides a kind of battery management system and energy storage system.

[0004] The utility model embodiment provides a kind of battery management system, and the battery management system is used in energy storage system, and the battery management system includes:

[0005] Centralized processor;

[0006] Functional module, the functional module is configured to be directly connected with the centralized processor, and the centralized processor is configured to process the signal transmitted by the functional module to control the energy storage system to work.

[0007] In this way, in the battery management system and energy storage system of the utility model embodiment, by transmitting the signal of the functional module of the energy storage system directly to the centralized processor without layer-by-layer uploading through multiple control module layers, the time used for uploading signal can be reduced, the battery management system is simplified, so that the centralized processor can quickly respond to various signals of functional module, and the processing efficiency of the centralized processor is improved.

[0008] In some embodiments, the functional module includes a battery management unit, and the centralized processor is directly connected with the battery management unit, and the centralized processor is configured to process the battery cell current and battery cell voltage collected by the battery management unit.

[0009] In this way, by directly connecting the centralized processor with the battery management unit, the centralized processor can directly receive and process the battery cell voltage and battery cell current collected by the battery management unit, and control the energy storage system to work according to the processing result, thereby improving the processing efficiency of the battery-related information.

[0010] In some embodiments, the centralized processor is configured to determine the total current of the energy storage system according to the battery cell current.

[0011] Thus, by determining the total current of the energy storage system according to the cell current through the centralized processor, the device for separately collecting the total current can be omitted, thereby reducing the hardware of the battery management system and lowering the cost.

[0012] In some embodiments, the battery management unit is configured to collect the voltage of the battery pack, and the centralized processor is configured to determine the total voltage of the energy storage system according to the voltage of the battery pack, the battery pack comprising a plurality of the cells.

[0013] Thus, by configuring the battery management unit to collect the voltage of the battery pack and configuring the centralized processor to determine the total voltage of the energy storage system according to the voltage of the battery pack, the device for separately collecting the total voltage can be omitted, thereby reducing the hardware of the battery management system and lowering the cost.

[0014] In some embodiments, the functional module comprises an insulation sampling unit, the centralized processor is directly connected to the insulation sampling unit, and the centralized processor is configured to determine the insulation performance inside the energy storage system according to the signal collected by the insulation sampling unit.

[0015] Thus, by directly connecting the insulation sampling unit to the centralized processor, the signal transmission path of the insulation sampling unit is shorter, and the processing efficiency of the centralized processor for processing the signal transmitted by the insulation sampling unit is improved.

[0016] In some embodiments, the functional module comprises a safety management module, the centralized processor is directly connected to the safety management module, and the centralized processor is configured to process the signal transmitted by the safety module to perform safety management on the energy storage system.

[0017] Thus, by directly transmitting the signal containing the function information of the safety management module to the centralized processor, the centralized processor can quickly and timely process safety problems and perform more effective safety management on the energy storage system.

[0018] In some embodiments, the safety management module comprises a fire-fighting unit and / or an emergency stop unit.

[0019] In some embodiments, the functional module comprises a switch, the centralized processor is directly connected to the switch, and the number of interfaces of the switch is less than a set number.

[0020] Thus, by using the switch with a small number of interfaces to connect the centralized processor to connect other control systems in the energy storage system, the system cost is reduced.

[0021] In some embodiments, the communication mode between the centralized processor and the functional module comprises CAN bus communication, network port communication or daisy chain communication.

[0022] Thus, the communication between the centralized processor and the functional module is realized through CAN bus communication, network port communication or daisy chain communication, so that the functional module can directly transmit signals to the centralized processor, reducing the signal transmission link.

[0023] In some embodiments, the functional module includes at least one of an energy storage converter, an uninterruptible power supply, a power supply unit, a cooling unit, and a light emitting unit.

[0024] Thus, by directly connecting the functional module and the centralized processor, the processing efficiency of the centralized processor can be accelerated, so that the centralized processor can more timely process problems of the energy storage system and more accurately and effectively control the operation of the energy storage system.

[0025] The utility model embodiment provides a kind of energy storage system, the energy storage system includes the battery management system of any one embodiment as above.

[0026] Additional aspects and advantages of the utility model will be in part given in the following description, part will become obvious from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0028] Figure 1 It is the schematic diagram of battery management system of the utility model embodiment;

[0029] Figure 2 It is the schematic diagram of battery management system of prior art;

[0030] Figure 3 It is the schematic diagram of CMU of prior art;

[0031] Figure 4 It is the schematic diagram of BSC of prior art;

[0032] Figure 5 It is the schematic diagram of LC or EMS of prior art. DETAILED DESCRIPTION

[0033] The embodiments of the utility model are described in detail below, and the reference signs of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0034] In the existing energy storage system, a large amount of data needs to be calculated and processed, so the battery management system of the energy storage system has multiple levels, including BMU (battery management unit), CMU (battery control unit), BSC (power system management), LC (local controller), EMS (energy management system) and the like. In the related art, the controller in the battery management system of the energy storage system has low efficiency when processing various signals.

[0035] Based on the above possible problems, please refer to Figure 1 The utility model embodiment provides a battery management system 100, the battery management system 100 is used for energy storage system, the battery management system 100 includes centralized processor 10 and functional module 30, functional module 30 is configured to be directly connected with centralized processor 10, and centralized processor 10 is configured to process the signal transmitted by functional module 30 to control the energy storage system to work.

[0036] Specifically, in large energy storage, the energy is high, the data calculation amount is large, and it is difficult to process all data using a single processor, so multiple levels need to be set to disperse the data calculation amount to each level and reduce the processing amount of each processor. With the development of industrial and commercial systems, more and more industrial and commercial energy storage systems are put into use. With the reference of large energy storage, even if the system is small (less than 1MWh on the DC side), the BMS control architecture of large energy storage system is still applied.

[0037] Industrial and commercial and large energy storage systems have different scenes. Large energy storage is more applied to power stations, industrial parks, heavy industries and the like. The characteristics of this part of the area are wide occupation area, large power consumption, large power and far away from the crowd. Industrial and commercial energy storage is more applied to enterprises, transportation stations, hospitals or servers and the like. Industrial and commercial energy storage is closer to the crowd than large energy storage, the scene is more flexible, and the interaction is more diverse. Applying the control architecture of large energy storage to industrial and commercial energy storage or household energy storage will have problems of low efficiency, low convenience of interaction, low safety and poor installation flexibility. Therefore, the control logic of large energy storage is no longer applicable to small and medium-sized energy storage systems such as industrial and commercial energy storage or household energy storage, and a more efficient and flexible control architecture needs to be considered to adapt to the characteristics of industrial and commercial energy storage.

[0038] The application embodiment designs a new BMS architecture, that is, a centralized processor 10 is arranged in the battery management system 100, and all signal processing functions are integrated in the centralized processor 10. The same parameters are unified and centrally processed. The other functional modules 30 of the battery management system 100 are directly connected to the centralized processor 10, and transmit their signals to the centralized processor 10 for processing by the centralized processor 10. The centralized processor 10 can obtain the state information of the energy storage system and control the energy storage system to work by processing the signals of the functional modules 30.

[0039] The embodiments of the present application are applicable to small and medium-sized energy storage systems. For example, the current commercial and industrial energy storage systems on the market have at most 2-3 clusters of batteries, which are much smaller than large energy storage systems with dozens of clusters. Therefore, the battery management system 100 of the embodiments of the present application can be applied to current commercial and industrial energy storage systems or household energy storage systems. Moreover, since the information of the battery cell, the switch quantity and the safety data in the system are more concentrated, they are more convenient to process. Therefore, the control logic can be more detailed. Therefore, the battery management system 100 collects and processes the signals of the functional modules 30 in a centralized manner, which can improve the response speed to medium and large safety problems and further improve the safety of the energy storage system.

[0040] It should be noted that, when the computing power of the centralized processor 10 is sufficient, the battery management system 100 of the embodiments of the present application is also applicable to large energy storage systems.

[0041] Please refer to Figure 2 In the related art, the BSC, LC and EMS are arranged layer by layer. Among them, the BSC is responsible for directly collecting the information of the battery cell voltage, temperature and the like. The LC is responsible for uniformly collecting the information in the system, and completing the processing and classification, maintaining the interface, and bearing the total input and output of the energy storage system. The EMS is responsible for system energy scheduling, function control, system diagnosis and early warning, system regulation and control, and customer interruption connection to realize customer terminal man-machine interaction. The signals of each functional module need to be uploaded layer by layer before being processed. For example, the fire information of the fire unit in the energy storage system needs to be uploaded to the BSC first, and then uploaded to the LC after being summarized by the BSC. The LC processes and classifies the information, and continues to upload it to the EMS, which performs corresponding system scheduling and system diagnosis and early warning.

[0042] In an embodiment of the present application, the fire unit 151 is directly connected to the centralized processor 10 and transmits the signal containing the fire information to the centralized processor 10. The centralized processor 10 directly performs corresponding system scheduling and system diagnosis and early warning according to the signal.

[0043] Since in the related art, each control module is dispersed, and each control unit needs to have a certain computing power, various types of controllers are added in each control unit. In the embodiments of the present application, the multiple control modules in the original system are all integrated into a centralized processor 10, so that all signals are uniformly collected by the centralized processor 10 and uniformly processed by the centralized processor 10. Therefore, only the controller needs to be arranged in the centralized processor 10, which reduces the hardware arrangement and reduces the system arrangement cost.

[0044] In one embodiment, the controller in the original LC or EMC is sufficient in computing power, and is idle in a large case, the controller in the original LC or EMC can be used as the centralized processor 10, and is directly connected with each functional module 30, so that no additional hardware components are needed, and development cost is reduced.

[0045] In addition, the more control modules in the energy storage system, the more failure points are likely to occur. The battery management system 100 of the embodiments of the present application can realize centralized control through simplified settings, so that many single device failure modes can be avoided, and even if the failure modes cannot be avoided, the failure points can be found at a relatively lower cost and faster speed.

[0046] Further, in the centralized processor 10, information is uniformly collected and processed, and only the priority of each type of signal collected by the centralized processor 10 needs to be set to perform efficient processing. At the same time, since only one centralized processor 10 is provided, when the function of the centralized processor 10 is increased, the centralized processor 10 only needs to be upgraded, and the upgrading method is simple. In one embodiment, in the priority order of the signals collected by the centralized processor 10, the priority of the safety signal is the highest, so as to ensure the safe operation of the energy storage system. The safety signal refers to the fire signal transmitted by the fire unit 151, the emergency stop signal transmitted by the emergency stop unit 153, and the signal indicating that the battery has a fault.

[0047] In this way, by directly transmitting the signals of the functional modules 30 of the energy storage system to the centralized processor 10 without layer-by-layer uploading through multiple control module layers, the time for uploading the signals can be reduced, the battery management system 100 is simplified, the centralized processor 10 can quickly respond to various signals of the functional modules 30, and the processing efficiency of the centralized processor 10 is improved.

[0048] In some embodiments, the functional module 30 includes a battery management unit 11, the centralized processor 10 is directly connected with the battery management unit 11, and the centralized processor 10 is configured to process the battery cell current and the battery cell voltage collected by the battery management unit 11.

[0049] Specifically, the BMU (Battery Management Unit, battery management unit 11) can be used to directly collect the current and voltage of the battery cell to obtain the battery cell current and the battery cell voltage, and transmit the battery cell current and the battery cell voltage to the centralized processor 10.

[0050] In the related art, the BMS of the energy storage system includes multiple control layers. For example, a CMU, an LC and an EMS are arranged layer by layer. Among them, the CMU is responsible for collecting power distribution, various switch values and fire-fighting information in the system, and uploading after summarizing. The BMU, the CMU, the LC and the EMS are connected in turn. The BMU transmits the battery cell current and the battery cell voltage obtained by collection to the CMU, the CMU uploads to the LC after summarizing and calculating. The LC processes and classifies the obtained battery cell related data and transmits it to the EMS. The EMS further performs energy scheduling and function control of the energy storage system according to the battery cell related data. Through this way of data uploading and processing, multiple and complex control levels are used.

[0051] Please refer to Figures 3 to 5 In the related art, the CMU needs to be provided with a first communication interface, a second communication interface and a third communication interface to respectively communicate with the lower level, communicate with the upper level and communicate with other functional modules. In addition, it also includes a power supply interface, a DIDO interface and a sampling interface. It can be seen that in the multi-level BMS architecture, the CMU needs multiple interfaces to communicate and connect with the upper and lower levels. Similarly, the BSC, the LC and the EMS also need to be provided with multiple communication interfaces, power supply interfaces and other interfaces, and the interface setting is complex.

[0052] Further, in the related art, the power supply and communication types used by the CMU, the BSC, the LC and the EMS may also be different. For example, the CMU usually needs low-voltage power supply, including 24V, 12V, etc., but the BSC and the LC usually use 24V, 48V or 220V power supply, and the EMC usually uses 220V power supply. For example, the CMU communicating with the BMU needs to include daisy chain, CAN, 485 communication; while the BSC and the LC need to have 485, CAN and network port; the device frequently maintained in the field needs to increase the maintenance interface; since the EMS communicates with the master station, the EMS also increases the wireless interface.

[0053] It can be seen that in the related art, the multi-level BMS architecture needs to be provided with multiple power supplies, multiple communications and multiple interfaces. The system also needs to design a shell separately for these different levels of products and reserve a placement position, causing unnecessary trouble.

[0054] In the embodiment of the present application, the CMU and LC are omitted, and the BMU is directly connected to the centralized processor 10. After the BMU collects the cell current and the cell voltage, the cell current and the cell voltage are directly uploaded to the centralized processor 10. After the centralized processor 10 calculates and processes the cell current and the cell voltage, the working of the energy storage system is controlled according to the processing result. The BMS architecture of the embodiment of the present application is simple in hierarchy, and the cell data does not need to be uploaded and processed layer by layer, so that the processing efficiency is improved. At the same time, since multiple control modules do not need to be set, only the power supply interface of the centralized processor 10 and the communication interface connected with each functional module 30 need to be set, so that the number of interfaces is reduced, and the setting difficulty and the maintenance difficulty are reduced.

[0055] In addition, in the battery management system 100 of the embodiment of the present application, other functionally similar components can be used to replace the BMU, and the components are provided with computing capability, and even a control chip can be integrated in the components, so that the control of the cells can be realized while the cells are detected.

[0056] In one embodiment, the energy storage system includes one energy storage battery, and the BMS can include only the power distribution part and the BMU, or only one BMU which is used to detect the state information of the entire energy storage system.

[0057] In this way, the centralized processor 10 can directly receive and process the cell voltage and the cell current collected by the battery management unit 11, and the working of the energy storage system is controlled according to the processing result, so that the processing efficiency of the battery related information is improved.

[0058] In some embodiments, the centralized processor 10 is configured to determine the total current of the energy storage system according to the cell current.

[0059] Specifically, since the CMU is omitted, the functional module 30 for collecting the total current of the energy storage system is not separately provided in the embodiment of the present application. However, according to the series-parallel connection relationship in the loop of the energy storage system, a relevant calculation method can be set in the centralized processor 10, so that the total current and the total voltage of the energy storage system can be determined according to the cell current and the cell voltage by the centralized processor 10.

[0060] For example, in the loop of the energy storage system, the currents at all positions in the series circuit are equal. In the parallel circuit, the currents of each part are added to obtain the current of the part. The total current of the energy storage system can be determined according to the cell voltage of each cell in the energy storage system.

[0061] In this way, the total current of the energy storage system is determined by the centralized processor 10 according to the cell current, so that the device for separately collecting the total current can be omitted, the hardware of the battery management system 100 is reduced, and the cost is reduced.

[0062] In some embodiments, the battery management unit 11 is configured to collect the voltage of the battery pack, and the centralized processor 10 is configured to determine the total voltage of the energy storage system according to the voltage of the battery pack, the battery pack including a plurality of battery cells.

[0063] Specifically, as described above, the embodiments of the present application do not separately provide the functional module 30 for collecting the total voltage of the energy storage system.

[0064] Since the battery management unit 11 needs to have the ability to collect the voltage of the battery cell according to the energy storage standard, the battery management unit 11 can be further provided with the function of collecting the voltage of the single battery pack Pack. After collecting the voltage of the plurality of battery packs in the energy storage system, the voltage is transmitted to the centralized processor 10, and the centralized processor 10 sums the voltage of the plurality of battery packs in the energy storage system to determine the total voltage of the energy storage system.

[0065] Further, the voltage of the single battery pack collected by the BMU can be compared with the sum of the battery cell voltages of the battery cells to determine the accuracy of the collection result. That is, the sum of the battery cell voltages of the battery cells in the single battery pack is compared with the voltage of the battery pack to determine whether the voltage is accurate.

[0066] In this way, by configuring the battery management unit 11 to collect the voltage of the battery pack and configuring the centralized processor 10 to determine the total voltage of the energy storage system according to the voltage of the battery pack, the device for separately collecting the total voltage can be omitted, thereby reducing the hardware of the battery management system 100 and reducing the cost.

[0067] In some embodiments, the functional module 30 includes an insulation sampling unit 13, the centralized processor 10 is directly connected to the insulation sampling unit 13, and the centralized processor 10 is configured to determine the insulation performance inside the energy storage system according to the signal collected by the insulation sampling unit 13.

[0068] Specifically, the insulation sampling unit 13 is directly connected to the centralized processor 10, and the insulation sampling unit 13 is configured to detect the insulation of the battery pack and other components in the energy storage system to prevent electrical faults and safety hazards. After insulation sampling, the insulation sampling unit 13 transmits the collected signal to the centralized processor 10. The centralized processor 10 can detect possible electrical faults or short circuits inside the battery system in time by processing the signal transmitted by the insulation sampling unit 13, thereby avoiding safety problems such as battery performance degradation, thermal runaway, and even fire.

[0069] In the related art, the insulation sampling unit, the CMU, the LC, and the EMS are connected in sequence. That is, the signal collected by the insulation sampling unit is transmitted to the EMS for processing after being transmitted layer by layer through the CMU and the LC, resulting in a long transmission path and low processing efficiency.

[0070] In the battery management unit 11 of the embodiments of the present application, the insulation sampling unit 13 is directly connected to the centralized processor 10 and can directly transmit the sampled signals to the centralized processor 10, the transmission path is short, the centralized processor 10 can timely and quickly process the signals transmitted by the insulation sampling unit 13, and the processing efficiency is improved.

[0071] In this way, the insulation sampling unit 13 is directly connected to the centralized processor 10, the signal transmission path of the insulation sampling unit 13 is shorter, and the processing efficiency of the centralized processor 10 in processing the signals transmitted by the insulation sampling unit 13 is improved.

[0072] In some embodiments, the functional module 30 includes a safety management module 15, the centralized processor 10 is directly connected to the safety management module 15, and the centralized processor 10 is configured to process the signals transmitted by the safety module to manage the safety of the energy storage system.

[0073] Specifically, the safety management module 15 is used to detect the safety state of the energy storage system. For example, detecting the fire safety state, fault state, etc. of the energy storage system. The safety management module 15 is directly connected to the centralized processor 10, and does not need to be transmitted to the centralized processor 10 through layer-by-layer uploading, which speeds up the transmission of signals. The centralized processor 10 can determine whether there is a safety problem in the energy storage system based on the signals transmitted by the safety management module 15, and control the operation of the energy storage system.

[0074] In some embodiments, the safety management module 15 includes a fire unit 151 and / or an emergency stop unit 153. The fire unit 151 can prevent, detect, and alarm the fire safety problem inside the energy storage system to ensure the safety of the energy storage system. The emergency stop unit 153 is used to quickly cut off the power supply of the energy storage system in an emergency, and isolate the energy storage system from the power grid and / or other equipment. The emergency stop unit 153 can detect abnormal conditions of the energy storage system in real time and transmit the detection results to the centralized processor 10 for processing and judgment by the centralized processor 10. Safety management includes fire safety management, emergency stop management, temperature management, etc.

[0075] In one embodiment, the safety management module 15 includes a fire unit 151. The fire unit 151 detects environmental parameters inside the energy storage system in real time, such as smoke, temperature, hydrogen concentration, carbon monoxide concentration, etc., and uploads the detection results to the centralized processor 10 in real time. When the centralized processor 10 determines that there is a fire safety problem in the energy storage system according to the detection results of the fire unit 151, it can issue an alarm and control the fire function components of the fire unit 151 of the energy storage system to work, so as to avoid the occurrence of fire or further deterioration of the situation when the fire has occurred.

[0076] Further, the switch quantity of the energy storage system is mainly generated by the power supply, electrical components, fire unit 151 and the like. In a small energy storage system, the switch quantity is small, and therefore the switch quantity can be integrated in the centralized processor 10. Even if the switch quantity generated in the safety management module 15 is large, the signals of the fire unit 151, the emergency stop unit 153 and the like can be collected in blocks and then uploaded to the centralized processor 10, so as to reduce the level while ensuring that the number of interfaces of the centralized processor 10 is small.

[0077] In this way, the signal containing the function information of the safety management module 15 is directly transmitted to the centralized processor 10, so that the centralized processor 10 can quickly and timely process safety problems and more effectively manage the safety of the energy storage system.

[0078] In some embodiments, the function module 30 includes a switch 17, the centralized processor 10 is directly connected to the switch 17, and the number of interfaces of the switch 17 is less than a set number.

[0079] Specifically, the switch 17 is used to connect other control systems in the energy storage system to the centralized processor 10, so that the centralized processor 10 can communicate with other control systems in the energy storage system through the switch 17.

[0080] Since the battery management system 100 in the embodiments of the present application directly connects the function module 30 to the centralized processor 10, and omits the intermediate levels such as CMU, BSC and LC, the number of required interfaces is greatly reduced, and a switch 17 with a small number of interfaces can be selected.

[0081] The set number is a preset number, and the number of interfaces of the switch 17 is small when the number of interfaces of the switch 17 is less than the set number.

[0082] In this way, the switch 17 with a small number of interfaces is used to connect the centralized processor 10 to connect other control systems in the energy storage system, thereby reducing the system cost.

[0083] In some embodiments, the communication mode between the centralized processor 10 and the function module 30 includes CAN bus communication, network port communication or daisy chain communication.

[0084] Specifically, in the related art, the communication link of the BMS architecture is complex, the BMU of each cluster of batteries needs to communicate with the corresponding CMU, the CMU and the BSC need to further deliver data to the LC, and the LC collects all information and then delivers it to the EMS. In some systems, the data is first delivered to the BSC, and then the BSC delivers it to the LC. In a large system, such hierarchical delivery can reduce the length of the communication harness, but in a small or medium-sized system, it is unnecessary to increase such a complex communication link.

[0085] In the embodiments of the present application, the implementation mode of the communication link between the functional module 30 and all the integrated processors 10 includes, but is not limited to, CAN bus communication, network port communication or daisy chain communication, so that the functional module 30 can directly transmit data to the integrated processor. Since the functional module 30 and the integrated processor are connected in a hand-in-hand manner, there is no risk of excessive interfaces in the integrated processor.

[0086] Further, the switching quantity signals in the energy storage system can be connected to the integrated processor 10, and the integrated processor 10 can collect and sort them. Since the switching quantity is the most basic function of the control chip, the switching quantity can be directly integrated in the integrated processor 10, and the implementation mode is simple.

[0087] In addition, the operation permission can be opened in the integrated processor 10, so that the interface connected to other functional components can be added on the integrated processor 10, so that the control and maintenance of the BMS can be flexible and convenient. Further, encryption processing can be performed when the operation permission is opened, so as to improve the security of the integrated processor 10.

[0088] In this way, the communication between the integrated processor 10 and the functional module 30 is realized by the CAN bus communication, the network port communication or the daisy chain communication, so that the functional module 30 can directly transmit signals to the integrated processor 10, and the signal transmission link is reduced.

[0089] In some embodiments, the functional module 30 includes at least one of an energy storage converter, an uninterruptible power supply, a power supply unit, a cooling unit, and a lighting unit.

[0090] Specifically, the energy storage converter (PCS) can be used to charge and discharge the battery after converting the voltage. The uninterruptible power supply (UPS) is used for uninterrupted power supply. The power supply unit includes a power supply to supply energy for the operation of the energy storage system. The cooling unit includes a fan and the like, which is used to control the temperature of the energy storage system. The lighting unit includes an indicator light, a door light and the like, which is used to indicate the state of the energy storage system. The functional module 30 can also include other components that can support the operation of the energy storage system, such as DCDC, group string type PCS, etc., which are not listed here.

[0091] The above-mentioned functional module 30 is directly connected with the integrated processor 10 and directly transmits its own signals to the integrated processor 10, so that the integrated processor 10 can timely receive and quickly process the signals of the functional module 30, and the processing efficiency of the integrated processor 10 is accelerated.

[0092] Therefore, by directly connecting the function module 30 with the centralized processor 10, the processing efficiency of the centralized processor 10 can be improved, and the centralized processor 10 can process problems of the energy storage system more timely and control the energy storage system more accurately and effectively.

[0093] The energy storage system provided by the embodiment of the present application comprises the battery management system 100 of any one of the above embodiments. Specifically, the energy storage system can further comprise an energy storage battery, etc. The battery management system 100 can manage the operation of the energy storage battery, so as to ensure that the energy storage battery operates safely, stably and efficiently.

[0094] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0095] In addition, the term "connection" should be understood broadly, for example, it can include fixed connection, or detachable connection, or integral connection; it can include direct connection, or indirect connection through intermediate medium, or internal communication of two elements. 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.

[0096] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0097] Any process or method described in the flowchart or otherwise described herein can be understood as representing code modules, segments or portions of code that include executable instructions for performing specific logic functions or steps, and the scope of the preferred embodiments of the present application includes additional implementation in which the functions are performed in different orders, including substantially simultaneously, or in reverse order, according to the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0098] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A battery management system for an energy storage system, the battery management system comprising: The battery management system comprises: a centralized processor; a function module, which is configured to be directly connected with the centralized processor, and the centralized processor is configured to process signals transmitted by the function module to control the operation of the energy storage system.

2. The battery management system of claim 1, wherein, The function module comprises a battery management unit, the centralized processor is directly connected with the battery management unit, and the centralized processor is configured to process cell current and cell voltage collected by the battery management unit.

3. The battery management system of claim 2, wherein, The centralized processor is configured to determine the total current of the energy storage system according to the cell current.

4. The battery management system of claim 2, wherein, The battery management unit is configured to collect the voltage of the battery pack, the centralized processor is configured to determine the total voltage of the energy storage system according to the voltage of the battery pack, and the battery pack comprises a plurality of cells.

5. The battery management system of claim 1, wherein, The function module comprises an insulation sampling unit, the centralized processor is directly connected with the insulation sampling unit, and the centralized processor is configured to determine the insulation performance inside the energy storage system according to signals collected by the insulation sampling unit.

6. The battery management system of claim 1, wherein, The function module comprises a safety management module, the centralized processor is directly connected with the safety management module, and the centralized processor is configured to process signals transmitted by the safety module to perform safety management on the energy storage system.

7. The battery management system of claim 6, wherein, The safety management module comprises a fire-fighting unit and / or an emergency stop unit.

8. The battery management system of claim 1, wherein, The function module comprises a switch, the centralized processor is directly connected with the switch, and the number of interfaces of the switch is less than a set number.

9. The battery management system of claim 1, wherein, The communication mode between the centralized processor and the function module comprises CAN bus communication, network port communication or daisy chain communication.

10. The battery management system of claim 1, wherein, The function module comprises at least one of an energy storage converter, an uninterruptible power supply, a power supply unit, a cooling unit and a light-emitting unit.

11. An energy storage system characterized by, The energy storage system comprises the battery management system according to any one of claims 1-9.

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