Energy storage system, control method, storage medium and electric equipment

Abstract

The invention discloses an energy storage system, a control method, a storage medium and electric equipment. The energy storage system comprises a battery, a battery management system, a valve and a first temperature detection module. The battery management system comprises a master control module and at least two slave control modules which are electrically connected. A valve is arranged between at least one slave control module and a corresponding battery, and the valve is configured to have a first valve opening degree. On one hand, under the condition that the valve is at the first valve opening degree, electric energy interaction between the at least one slave control module and the corresponding battery is disconnected, so that the main control module can be awakened to execute the preset function, and the main control module can execute the preset function according to the battery operation parameters obtained by the slave control modules and the temperature data of the valve. For example, whether thermal runaway occurs or not is confirmed, and corresponding fault operation is executed.

Description

Technical Field

[0001] This application relates to the field of battery thermal management technology, specifically to energy storage systems, control methods, storage media, and electrical equipment. Background Technology

[0002] Thermal runaway is a serious safety malfunction in battery systems. When a cell triggers thermal runaway, it instantly generates a large amount of high-temperature gas and heat, causing a sharp increase in internal pressure and temperature of the energy storage system. If the high temperature and flames cannot be effectively isolated, it can trigger a chain reaction of thermal runaway reactions in adjacent cells, i.e., heat propagation, which may eventually lead to a fire and explosion of the entire energy storage system.

[0003] When the vehicle is running (operating state), the Battery Management System (BMS) can collect signals such as voltage, temperature, and pressure in real time to determine if thermal runaway has occurred. However, when the vehicle is parked and the engine is off, the BMS enters sleep mode to conserve power. In this state, most of the BMS's detection functions are disabled. If thermal runaway occurs at this time, the BMS cannot detect it and be woken up, thus failing to perform the corresponding fault operations.

[0004] In related technologies, BMS wake-up relies on an electronic wake-up signal, which has low reliability. Summary of the Invention

[0005] This application provides an energy storage system, control method, storage medium, and electrical device, which improves the reliability of the battery management system being woken up, thereby at least partially solving the above-mentioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, an energy storage system is provided, the energy storage system comprising: Battery; The battery management system includes a master control module and at least two slave control modules connected electrically, wherein at least one of the slave control modules interacts with the battery. A valve is disposed between at least one of the slave control modules and the corresponding battery, the valve being configured to have a first valve opening degree; The first temperature detection module is configured to detect the temperature data of the valve, and the first temperature detection module is electrically connected to the main control module; When the valve is at the first valve opening degree, at least one of the slave control modules disconnects the power exchange with the corresponding battery to wake up the master control module to execute a preset function; wherein the preset function includes collecting the temperature data of the valve and / or the operating parameters of the battery.

[0007] By setting a valve between at least one slave control module and its corresponding battery, and configuring the valve to have a first valve opening degree, the electrical interaction between the slave control module and the corresponding battery is disconnected when the valve is at the first valve opening degree. This allows the master control module to be awakened to execute preset functions. In addition to the battery operating parameters obtained from the slave control modules, the master control module can also execute preset functions based on the valve's temperature data, such as confirming whether thermal runaway has occurred and performing corresponding fault operations. Furthermore, by using a mechanical valve to control the electrical interaction between the slave control module and the corresponding battery, there is no need to set up a separate sensor to identify the valve status and transmit sensor signals. This effectively reduces the structural complexity of the battery system, avoids false wake-ups in non-fault scenarios, further improves the accuracy of thermal runaway fault identification, and avoids invalid warnings caused by misjudgment of a single signal or the inability to smoothly transmit sensor signals.

[0008] Optionally, the main control module is further configured to determine that the energy storage system has malfunctioned if the temperature data of the valve is greater than or equal to a temperature threshold.

[0009] After the main control module is activated, it combines the valve temperature data and battery operating parameters to determine whether the battery has experienced thermal runaway. This avoids false alarms caused by relying on a single data point to determine whether the battery has experienced thermal runaway, thus improving the accuracy of the diagnosis.

[0010] Optionally, the first temperature detection module is configured to correspond one-to-one with each of the valves; the main control module is further configured to locate the faulty battery based on the temperature data of the valves.

[0011] By analyzing the temperature data of each valve, the location of the battery that experienced thermal runaway can be identified, allowing for targeted troubleshooting actions (such as alarm prompts, limiting battery charging and discharging, cutting off high-voltage circuits, and activating fire suppression systems), thus improving work efficiency.

[0012] Optionally, the valve is also configured to have a second valve opening degree; When the valve is at the second valve opening degree, each slave control module and the corresponding battery form an electrical energy interaction, so that each slave control module can obtain the operating parameters of the battery respectively; The opening degree of the second valve is less than that of the first valve.

[0013] By associating the second valve opening degree with the normal operating state of the slave control module, the slave control module and the battery's electrical energy can be kept in a state of electrical energy interaction, thus ensuring the normal operation of the slave control module.

[0014] Optionally, the first valve opening degree includes the maximum opening degree.

[0015] With the valve in its first opening position, after the valve cover, valve stem, and insulating connector move a certain distance along the first direction, the conductive component can move along the first direction to the disconnected position. In the conducting position, the conductive component disconnects from both the first and second external conductive components, thus breaking the current flow path between the first, second, and third external conductive components. The first and second external conductive components are respectively connected to the slave control module and the battery, thus disconnecting the power exchange between the slave control module and the battery. Consequently, the slave control module can no longer periodically collect parameters such as voltage and temperature from the corresponding battery, leading to the master control module's inability to obtain battery parameters from the corresponding slave control module, resulting in data interruption. Therefore, the master control module is awakened from low-power sleep mode to normal operating state and executes the corresponding functions.

[0016] Optionally, the second valve opening degree includes a minimum opening degree.

[0017] When the valve is in the second valve opening position, the valve cover, valve stem, insulating connector and conductive component move to the right in the first direction until they are connected to the first external conductive component and the second external conductive component respectively, thereby realizing the electrical energy interaction between the slave control module and the battery, ensuring that the slave control module can periodically collect battery temperature and voltage signals.

[0018] Optionally, each slave control module has a first circuit with the corresponding battery, and a valve is set in one of the first circuits to control the on / off state of the first circuit where the valve is located.

[0019] By establishing a first circuit between each slave control module and its corresponding battery, and installing a valve on one of these first circuits, the system enables the switching on and off of one of the first circuits. Meanwhile, the other slave control modules maintain electrical energy exchange with the batteries, ensuring the normal operation of the battery management system. In other words, with each slave control module having an independent power supply, the electrical energy exchange between each slave control module and the power supply is controlled by an independent valve.

[0020] Optionally, the battery management system is further configured such that, when one of the slave control modules disconnects its power interaction with the battery, each of the remaining slave control modules maintains power interaction with its corresponding battery, and each of the remaining slave control modules is electrically connected to the master control module.

[0021] Using the above technical solution, when the power interaction between one slave control module and the battery is disconnected, the remaining slave control modules maintain power interaction with the battery, and each of the remaining slave control modules is electrically connected to the master control module, which ensures the normal operation of multiple slave control modules of the battery management system, and the slave control modules can obtain most of the battery's operating parameters (such as temperature and voltage).

[0022] Optionally, the battery operating parameters include battery temperature data; The battery management system also includes: The second temperature detection module is configured to detect the temperature data of the battery. Each of the second temperature detection modules is connected to the corresponding slave control module.

[0023] By adopting the above technical solution, each second temperature detection module is connected to a corresponding slave control module. At least one second temperature detection module is set on each battery to realize single-point detection of the battery. Each temperature detection module is set with a corresponding slave control module. In this way, the temperature data of each battery is transmitted to the slave control module separately, realizing the stability and reliability of temperature data transmission.

[0024] Optionally, the battery's operating parameters include the battery's voltage data; the battery management system further includes: A voltage detection module is configured to detect the voltage data of the battery; Each of the voltage detection modules is connected to the corresponding slave control module.

[0025] Using the above technical solution, each voltage detection module works independently and transmits the detected voltage data to the corresponding slave control module, which can accurately determine whether the battery has faults such as overvoltage or undervoltage.

[0026] Optionally, the energy storage system is further configured to: when the internal air pressure of the energy storage system reaches a first air pressure threshold, cause the valve to be in a first valve opening degree under the action of the air pressure.

[0027] When the battery of the energy storage system is operating normally (such as during charging or driving), the internal air pressure will only fluctuate slightly due to changes in ambient temperature and slight gas production, remaining far below the first air pressure threshold. The valve will always maintain the second valve opening (minimum opening). The first and second external conductive components maintain electrical energy interaction through the conductive components, thus preventing false wake-up of the main control module. Only when thermal runaway occurs will the battery of the energy storage system react violently and generate a large amount of high-pressure gas, causing the internal air pressure of the energy storage system to rise sharply or even exceed the first air pressure threshold. The valve will reach the first valve opening under the action of air pressure, avoiding false wake-up of the main control module in non-faulty scenarios and improving the accuracy of judgment.

[0028] According to a second aspect of this application, a control method for an energy storage system is provided, applied to the energy storage system described above, the control method comprising: When the valve is at the first valve opening degree, the power interaction between at least one slave control module and the corresponding battery is disconnected to wake up the master control module to collect the temperature data of the valve and / or the operating parameters of the battery.

[0029] Optionally, the control method of the energy storage system further includes: locating the faulty battery based on the temperature data of the valve.

[0030] Optionally, the control method of the energy storage system further includes: locating the faulty battery based on the temperature data of the valve.

[0031] Optionally, the control method for the energy storage system further includes: When the valve is at the second valve opening degree, each slave control module and the corresponding battery form an electrical energy interaction, so that each slave control module can obtain the operating parameters of the battery respectively; The opening degree of the second valve is smaller than that of the first valve.

[0032] Optionally, the control method for the energy storage system further includes: When the power exchange between one of the slave control modules and the battery is disconnected, each of the remaining slave control modules maintains power exchange with the corresponding battery.

[0033] Optionally, the control method of the energy storage system further includes: detecting the temperature data of the battery.

[0034] Optionally, the control method of the energy storage system further includes: detecting the voltage data of the battery.

[0035] Optionally, the control method of the energy storage system further includes: collecting pressure data inside the battery.

[0036] Optionally, the control method of the energy storage system further includes: detecting the temperature data of the valve.

[0037] According to a third aspect of this application, a computer-readable storage medium is provided that stores a computer program or instructions thereon, the computer program or instructions being loaded by a processor to perform steps in a control method for an energy storage system.

[0038] According to a fourth aspect of this application, embodiments of this application also provide a computer program product, including a computer program or instructions, which, when executed by a processor, implement the control method of the energy storage system described above.

[0039] According to a fifth aspect of this application, embodiments of this application also provide an electronic device, including: a memory and a processor, wherein the memory stores a computer program or instructions; the processor is configured to execute the computer program or instructions in the memory to implement the steps of the control method for the energy storage system described above. According to a sixth aspect of this application, an electrical appliance is provided, including the energy storage system described above.

[0040] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is an architecture diagram of an energy storage system provided in an exemplary embodiment of this application, in which the valve is at a second valve opening degree, so that an electrical energy interaction is formed between the first battery and the first slave control module; Figure 2 This is an architecture diagram of an energy storage system provided in an exemplary embodiment of this application, in which the valve is at a first valve opening degree, thereby disconnecting the power interaction between the first battery and the first slave control module; Figure 3 This is another architecture diagram of the energy storage system provided in the exemplary embodiment of this application, in which the valve is at the second valve opening degree so that the first battery and the first slave control module form an electrical energy interaction. Figure 4 This is another architecture diagram of the energy storage system provided in the exemplary embodiment of this application, in which the valve is at a first valve opening degree, so that the power interaction between the first battery and the first slave control module is disconnected; Figure 5 This is an architecture diagram of the battery management system provided in an exemplary embodiment of this application; Figure 6 This is a schematic diagram of the valve in the first valve opening position provided in an exemplary embodiment of this application; Figure 7 This is a schematic diagram of the valve in the second valve opening position provided in an exemplary embodiment of this application; Figure 8 This is a flowchart of a control method provided in an exemplary embodiment of this application; Figure 9 This is a flowchart of another control method provided in an exemplary embodiment of this application.

[0043] Explanation of reference numerals in the attached figures: 100. Energy storage system; 10. Battery; 101. First battery; 102. Second battery; 10N. Nth battery; 20. Battery management system; 201. Main control module; 202. Slave control module; 2021. First slave control module; 2021a. First sub-communication loop; 2021b. Second sub-communication loop; 2022. Second slave control module; 2023. Third slave control module; 2024. Nth slave control module; 30. Valve; 301. Valve cover; 302. Valve seat; 303. Valve stem; 304. Conductive component; 305. Reset component; 306. First external conductive component; 307. Second external conductive component; 308. Insulating connector; 40. First temperature detection module; 50. Voltage detection module; 60. Second temperature detection module. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0047] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0048] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0049] Based on the aforementioned background technology, a state identification system for explosion-proof valves is disclosed in related technologies. The identification system includes at least one mechanical explosion-proof valve, a thermal runaway acquisition module, a battery pack, and an explosion-proof valve state identification circuit. The mechanical explosion-proof valve and the thermal runaway acquisition module are mounted on the battery pack. The explosion-proof valve state identification circuit is connected to the continuity monitoring device in all mechanical explosion-proof valves. By acquiring the circuit output signal output by the explosion-proof valve state identification circuit, which includes a valve opening wake-up signal output when the continuity monitoring device is in a connected state, the system acquires thermal runaway information collected by the thermal runaway acquisition module under the control of the valve opening wake-up signal, and determines the opening state of the mechanical explosion-proof valve based on the thermal runaway information.

[0050] In this identification system, the opening status of the explosion-proof valve is identified to output a valve opening wake-up signal, which is used to wake up the BMS. However, this wake-up method still relies on the transmission of sensor signals, requiring additional status identification circuits and signal processing modules. This makes the structure of the battery 10 system complex and may reduce reliability, leading to response delays or false alarms in thermal runaway emergencies.

[0051] In view of this, embodiments of this application provide an energy storage system 100 that can improve the accuracy of judging thermal runaway of battery 10.

[0052] According to a first aspect of this application, an energy storage system 100 is provided, comprising: a battery 10, a battery management system 20, a valve 30, and a first temperature detection module 40. The battery management system 20 includes a master control module 201 electrically connected to at least two slave control modules 202, wherein at least one slave control module 202 interacts with the battery 10. The valve 30 is disposed between at least one slave control module 202 and the corresponding battery 10, and the valve 30 is configured to have a first valve opening. The first temperature detection module 40 is configured to detect the temperature data of the valve 30, and the first temperature detection module 40 is electrically connected to the master control module 201.

[0053] When valve 30 is in the first valve opening position, the power interaction between at least one slave control module 202 and the corresponding battery 10 is disconnected to wake up the master control module 201 to execute the preset function.

[0054] In this embodiment, the preset function performed by the main control module is to collect the temperature data of the valve and / or the operating parameters of the battery. The operating parameters of the battery may include: the temperature data, voltage data, and pressure data inside the battery pack, etc. The operating parameters of the battery can be obtained through temperature detection module, voltage detection module, and pressure detection module.

[0055] The main control module 201 is primarily responsible for the overall monitoring and data aggregation of the energy storage system 100 (such as the total voltage, total current, remaining charge (SOC), and state of health (SOH) of the batteries 10), as well as controlling the charging and discharging of the batteries 10. Each slave control module 202 is connected to a group of batteries 10 (or a single battery cell 10), responsible for collecting parameters such as voltage and temperature of the corresponding battery 10, and communicating with the main control module 201 to transmit the collected parameters of the battery 10 to the main control module 201 to control the charging and discharging of the battery 10, preventing overcharging, over-discharging, or overheating of a single battery 10 from affecting the system performance of the energy storage system 100. In this embodiment, waking up the main control module 201 refers to waking up the main control module 201 from the low-power sleep mode. When the energy storage system 100 is in normal standby, low load, or no operation state, the main control module 201 can enter a low-power sleep mode. When the main control module 201 is in low-power sleep mode, the core computing module (such as the CPU) of the main control module 201 will reduce the main frequency or stop working, but the communication circuit between the main control module 201 and the slave control module 202 will maintain low-power operation. Therefore, when the power interaction between the slave control module 202 and the corresponding battery 10 is disconnected, the slave control module 202 that has disconnected the power interaction can no longer periodically collect parameters such as voltage and temperature of the corresponding battery 10, which leads to the main control module 201 being unable to obtain battery 10 parameters from the corresponding slave control module 202, resulting in a data interruption. Therefore, the main control module 201 is woken up from the low-power sleep mode to the normal working state and performs the corresponding functions.

[0056] In some embodiments, the main control module is further configured to determine that the energy storage system has failed if the temperature data of the valve is greater than or equal to a temperature threshold.

[0057] It should be noted that when we confirm a failure in the energy storage system, we are referring to a failure in the energy storage unit within the system, such as a battery.

[0058] Specifically, when the temperature of battery 10 rises, causing high-temperature gas to be generated inside the energy storage system 100, the high-temperature gas pressure acts on valve 30, pushing valve cover 301 of valve 30 to move conductive component 304 along the first direction, thus opening valve 30. Simultaneously, the high-temperature gas directly heats valve 30. Therefore, the temperature data of valve 30 measured by the first temperature detection module 40 will also increase. If the temperature data of valve 30 exceeds a certain temperature threshold, it is confirmed that battery 10 has experienced thermal runaway. This avoids false wake-ups of the main control module 201 due to mechanical vibration causing valve 30 to have a first valve opening, further improving the reliability of main control module 201 wake-up. After main control module 201 is woken up, it combines the temperature data of valve 30 and battery operating parameters to determine whether the battery has experienced thermal runaway. This avoids false alarms caused by judging whether the battery has experienced thermal runaway based on a single data point, improving the accuracy of determining whether the battery has experienced thermal runaway.

[0059] For example, in this embodiment of the application, there can be multiple valves 30, with one or more valves 30 provided for each battery 10. Since the temperature of the battery 10 that has experienced thermal runaway will increase rapidly, the temperature of the valves 30 provided for each battery 10 will change drastically (for example, the temperature will rise rapidly to above 80°C within ten seconds). By using the temperature data of each valve 30, the location of the battery 10 that has experienced thermal runaway can be identified, and targeted fault operations can be performed (such as alarm prompts, limiting the charging and discharging of the battery 10, cutting off the high-voltage circuit, and activating the fire extinguishing device).

[0060] It is understood that the first temperature detection module 40 in this embodiment may include a temperature detection element, which is disposed on the valve 30 and electrically connected to the main control module 201. The temperature detection element can collect the temperature of the valve 30 and send the collected temperature to the main control module 201, so as to add a data type for the main control module 201 to determine the state of the battery 10. For example, the temperature detection element may be a temperature sensor.

[0061] In summary, in this embodiment, a valve 30 is provided between at least one slave control module 202 and the corresponding battery 10, and the valve 30 is configured to have a first valve opening. On the one hand, when the valve 30 is at the first valve opening, the electrical interaction between at least one slave control module 202 and the corresponding battery 10 is disconnected, thus enabling the master control module 201 to execute preset functions based at least on the temperature data of the valve 30 and the operating parameters of the battery 10. In this way, the master control module 201 can not only determine whether thermal runaway has occurred based on the operating parameters of the battery 10 obtained from the slave control module 202, but also based on the temperature data of the valve 30, and execute corresponding preset functions, such as fault operation. On the other hand, the mechanical valve 30 controls the electrical energy interaction between the slave control module 202 and the corresponding battery 10. There is no need to set up a separate sensor to identify the state of the valve 30 for the transmission of sensor signals. This effectively reduces the structural complexity of the battery 10 system, avoids false wake-ups in non-fault scenarios, further improves the accuracy of thermal runaway fault identification, and avoids invalid warnings caused by misjudgment of a single signal or the inability to smoothly transmit sensor signals.

[0062] For example, in this embodiment of the application, the main control module 201 can also determine the state of the battery 10 based solely on the operating parameters of the battery 10, or simultaneously determine the state of the battery 10 based on the temperature data of the valve 30 and the operating parameters of the battery 10 obtained by the other slave control modules 202. There is no limitation on this.

[0063] In some embodiments, valve 30 is further configured to have a second valve opening. When valve 30 is at the second valve opening, each slave control module 202 engages with the corresponding battery 10 to obtain the operating parameters of the battery 10. The second valve opening is smaller than the first valve opening.

[0064] By associating the second valve opening of valve 30 with the normal operating state of slave control module 202, the slave control module 202 and the battery 10 can be kept in a state of electrical energy interaction, thus ensuring the normal operation of slave control module 202.

[0065] It is understood that the opening degree of the first valve in this embodiment is greater than the opening degree of the second valve. That is, the opening degree of valve 30 is coupled with the gas pressure inside the energy storage system 100. When the gas pressure inside the energy storage system 100 reaches a certain threshold, valve 30 can be in the first valve opening degree; when the gas pressure inside the energy storage system 100 drops to a certain value, valve 30 can be in the second valve opening degree. By setting the first valve 30 to a greater opening degree than the second valve, the electrical energy between the slave control module 202 and the battery 10 is disconnected when valve 30 is open.

[0066] It should be noted that during the transition of valve 30 from the second valve opening to the first valve opening, valve 30 is in an open state. During this process, battery 10 maintains electrical energy interaction with slave control module 202, that is, the master control module 201 is not awakened. The high-pressure gas in energy storage system 100 will also be discharged along the first exhaust channel of valve 30 to reduce the gas pressure in energy storage system 100 and balance the gas pressure in energy storage system 100.

[0067] For example, the operating parameters may include, but are not limited to, battery voltage data, battery temperature data, battery power data, etc.

[0068] In some embodiments, the first valve opening degree includes the maximum opening degree.

[0069] In some embodiments, the second valve opening degree includes a minimum opening degree.

[0070] It is understood that the first valve opening degree in this embodiment includes the maximum opening degree of valve 30, which refers to the maximum opening degree that valve 30 can reach after thermal runaway of battery 10 causes a sharp increase in the gas pressure inside battery 10. At the maximum opening degree, the first external conductive component 306 and the second external conductive component 307 of valve 30 are disconnected under the action of valve 30, realizing the disconnection of electrical energy interaction between slave control module 202 and battery 10. The second valve opening degree in this embodiment includes the minimum opening degree of valve 30, which refers to the near-complete seal between valve cover 301 and valve seat 302 of valve 30 or a small venting gap between them when the energy storage system 100 is operating normally (such as driving or charging) or under slight gas pressure fluctuations (such as normal venting caused by ambient temperature changes). The first external conductive component 306 and the second external conductive component 307 are electrically connected to realize the electrical energy interaction between slave control module 202 and battery 10.

[0071] For example, please refer to Figure 6 and Figure 7In this embodiment, the valve 30 includes a valve cover 301, a valve seat 302, a valve stem 303, a conductive element 304, a reset element 305, a first external conductive element 306, and a second external conductive element 307. The reset element 305 is sleeved on the valve stem 303, with one end abutting against the valve seat 302 and the other end abutting against the valve stem 303. The conductive element 304 is insulatedly connected to the valve stem 303 via an insulating connector 308. The insulating connector 308, the conductive element 304, the valve cover 301, and the valve stem 303 form a single unit. The valve stem 303 passes through the through-space of the valve seat 302 and connects to the valve cover 301. The conductive element 304 can move in a first direction under the action of the valve stem 303 and the valve cover 301. The first external conductive element 306 and the second external conductive element 307 are respectively connected to the corresponding battery 10 and slave control module 202.

[0072] When valve 30 is in the first valve opening position, after valve cover 301, valve stem 303, and insulating connector 308 move a certain distance along the first direction, conductive component 304 can move to the disconnected position along the first direction. In the conducting position, conductive component 304 disconnects from the first external conductive component 306 and the second external conductive component 307, thus breaking the current flow path between the first external conductive component 306, conductive component 304, and the second external conductive component 307. The first external conductive component 306 and the second external conductive component 307 are respectively connected to the slave control module 202 and the battery 10, thus disconnecting the power exchange between the slave control module 202 and the battery 10. Therefore, the slave control module 202 can no longer periodically collect parameters such as voltage and temperature of the corresponding battery 10, resulting in the master control module 201 being unable to obtain battery 10 parameters from the corresponding slave control module 202, causing a data interruption. Therefore, the master control module 201 is woken up from the low-power sleep mode to the normal operating state and executes the corresponding functions.

[0073] When valve 30 is in the second valve opening position, valve cover 301, valve stem 303, insulating connector 308, and conductive component 304 move to the right in the first direction until they are connected to the first external conductive component 306 and the second external conductive component 307 respectively. This enables the first external conductive component 306 and the second external conductive component 307 to form a connection, so that the slave control module 202 and the battery 10 can interact with each other, ensuring that the slave control module 202 can periodically collect the temperature and voltage signals of the battery 10.

[0074] It should be noted that in this embodiment, the second valve opening is at its minimum, thus forming a sealed connection between the valve cover 301 and the valve seat 302. This ensures the airtightness of the energy storage system 100, preventing external substances (such as moisture and dust) from entering and avoiding corrosion or short-circuit risks to components such as the battery cell and wiring harness. The reset member 305 is in a compressed state, allowing the valve stem 303, valve seat 302, insulating connector 308, and conductive member 304 to tend to move away from the valve seat 302 along the first direction.

[0075] In some embodiments, each slave control module 202 has a first circuit with the corresponding battery 10, and a valve 30 is provided in one of the first circuits to control the opening and closing of the first circuit where the valve 30 is located.

[0076] By establishing a first circuit between each slave control module 202 and its corresponding battery 10, and installing a valve 30 on one of these first circuits, the on / off state of one of the first circuits is achieved, while the other slave control modules 202 maintain electrical energy interaction with the battery 10, ensuring the normal operation of the battery management system 20. In other words, with each slave control module 202 having an independent power supply, the opening and closing of the valve 30 on one of the first circuits is controlled to manage the electrical energy interaction between the slave control module 202 and the power supply.

[0077] For example, in this embodiment of the application, multiple batteries 10 constitute a battery module. The temperature of the middle battery 10 in a battery module is relatively high. Therefore, a valve 30 can be set on the first circuit between the middle battery 10 and the slave control module 202, and the valve 30 can control the power supply between the battery 10 and the slave control module 202.

[0078] It should be noted that, in this embodiment of the application, the first circuit between the slave control module 202 and the battery 10 can be a low-voltage wiring harness to connect the low-voltage electrical interface of the slave control module 202 and the battery 10.

[0079] In some embodiments, the battery management system 20 is further configured such that when one of the slave control modules 202 disconnects its power interaction with the battery 10, each of the remaining slave control modules 202 maintains power interaction with its corresponding battery 10, and each of the remaining slave control modules 202 is electrically connected to the master control module 201.

[0080] By adopting the above technical solution, when the power interaction between one of the slave control modules 202 and the battery 10 is disconnected, the other slave control modules 202 maintain power interaction with the battery 10, and each of the other slave control modules 202 is electrically connected to the master control module 201, which ensures the normal operation of the multiple slave control modules 202 of the battery management system 20, and the slave control modules 202 can obtain most of the operating parameters of the battery 10 (such as temperature and voltage).

[0081] It should be noted that each slave control module 202 is electrically connected to the master control module 201. Each slave control module 202 can be independently connected to the master control module 201. Of course, each slave control module 202 can also be connected to the master control module 201 through one of the multiple slave control modules 202.

[0082] When the power interaction between one of the slave control modules 202 and the battery 10 is disconnected, the other slave control modules 202 maintain power interaction with the battery 10, and each of the other slave control modules 202 is electrically connected to the master control module 201.

[0083] Each slave control module 202 can be connected to the master control module 201 through one of the multiple slave control modules 202. The other multiple slave control modules 202 can be connected to the master control module 201 through the slave control module 202 corresponding to valve 30. For example, the slave control module 202 corresponding to the first circuit where valve 30 is located is defined as the first slave control module 2021, and the remaining slave control modules 202 are defined as the second slave control module 2022, the third slave control module 2023, and so on, up to the Nth slave control module 2024. The battery 10 corresponding to each slave control module 202 is defined as the first battery 101, the second battery 102, the third battery 10, and so on, up to the Nth battery 10N. The first slave control module 2021 includes a first sub-communication circuit 2021a and a second sub-communication circuit 2021b. The first slave control module 2021 and the master control module 201 transmit the operating parameters of the first battery 101 through the first sub-communication circuit 2021a. The third slave control module 2023 and the Nth slave control module 2024 are connected in series. The second slave control module 2022 and the master control module 201 transmit the operating parameters of the remaining batteries 10 through the second sub-communication circuit 2021b of the first slave control module 2021.

[0084] In some embodiments, the battery operating parameters also include temperature data of the battery 10. Please refer to... Figure 5 The battery management system 20 in this embodiment further includes a second temperature detection module 60. The second temperature detection module 60 is configured to detect the temperature data of the battery 10; wherein each second temperature detection module 60 is connected to a corresponding slave control module 202.

[0085] The second temperature detection module 60 in this embodiment is used to detect the temperature data of the battery 10; wherein, each second temperature detection module 60 is connected to the corresponding slave control module 202.

[0086] By adopting the above technical solution, each second temperature detection module 60 is connected to the corresponding slave control module 202. At least one second temperature detection module 60 is set on each battery 10 to realize single-point detection of the battery 10. Each second temperature detection module 60 is correspondingly set to a slave control module 202. In this way, the temperature of each battery 10 is transmitted to the slave control module 202 individually, realizing the stability and reliability of temperature data transmission.

[0087] In some embodiments, the battery management system 20 further includes a voltage detection module 50. The voltage detection module 50 is configured to detect the voltage data of the battery 10; wherein each voltage detection module 50 is connected to a corresponding slave control module 202.

[0088] Using the above technical solution, each voltage detection module 50 works independently and transmits the detected voltage data to the corresponding slave control module 202, which can accurately determine whether the battery 10 has faults such as overvoltage or undervoltage.

[0089] In some embodiments, the energy storage system 100 is further configured to: when the internal air pressure of the energy storage system 100 reaches a first air pressure threshold, the valve 30 is placed at a first valve opening degree under the action of the air pressure.

[0090] When the battery 10 of the energy storage system 100 is operating normally (such as during charging or driving), the internal air pressure will only fluctuate slightly due to changes in ambient temperature and slight gas production, which is far below the first air pressure threshold. The valve 30 always maintains the second valve opening (minimum opening). The first external conductive component 306 and the second external conductive component 307 maintain electrical energy interaction through the conductive component 304, thus preventing the main control module 201 from being falsely awakened. Only when thermal runaway occurs, the battery 10 of the energy storage system 100 reacts violently and generates a large amount of high-pressure gas, causing the internal air pressure inside the energy storage system 100 to rise sharply or even exceed the first air pressure threshold. The valve 30 will reach the first valve opening under the action of air pressure, avoiding false awakening of the main control module 201 in non-fault scenarios and improving the accuracy of judgment.

[0091] It is understood that the valve opening in the embodiments of this application is coupled with the gas pressure inside the energy storage system 100.

[0092] In some embodiments, the preset functions include at least one of the following: collecting temperature data of battery 10; collecting voltage data of battery 10; collecting pressure data inside battery 10; and collecting temperature data of valve 30.

[0093] In this embodiment, after the main control module 201 is woken up, it performs the acquisition of voltage data of the battery 10, pressure data inside the battery 10, temperature data of the battery 10, and temperature data of the valve 30. Based on these data, it then determines whether the battery 10 has experienced thermal runaway. This method improves the accuracy of determining whether the battery 10 has experienced thermal runaway by not relying on a single data point.

[0094] In this embodiment, the main control module 201 can collect data by sensors such as temperature sensors, voltage sensors, and pressure sensors included in the battery management system 20, which collect temperature data of the battery 10 and voltage data of the valve 30. It can also collect temperature data of the valve 30 by a temperature sensor installed on the valve 30, thus avoiding monitoring failure due to the failure of a single sensor.

[0095] The battery management system 20 in the embodiments of this application will be described below with several examples.

[0096] Please see Figure 1 , Figure 1 This is an architecture diagram of the energy storage system 100 in the embodiments of this application. Figure 1 In the first battery 101 to the Nth battery 10N, the first slave control module 2021 to the Nth slave control module 2024 are respectively connected to each other. A valve 30 is set in the first circuit between the first battery 101 and the first slave control module 2021. The valve 30 is in the second valve opening degree so that the first battery 101 and the first slave control module 2021 can form an electrical energy interaction.

[0097] Please see Figure 2 , Figure 2 This is an architecture diagram of the energy storage system 100 in the embodiments of this application. The first battery 101 to the Nth battery 10N are respectively connected to the first slave control module 2021 to the Nth slave control module 2024. A valve 30 is provided in the first circuit between the first battery 101 and the first slave control module 2021. The valve 30 is in the first valve opening degree so that the power interaction between the first battery 101 and the first slave control module 2021 is disconnected.

[0098] Please see Figure 3 , Figure 3 This is an architecture diagram of the energy storage system 100 in the embodiments of this application. The first slave control module 2021 and the remaining second slave control modules 2022 to Nth slave control modules 2024 are respectively connected to the main control module 201 through the first sub-communication loop 2021a and the second sub-communication loop 2021b.

[0099] Please see Figure 4 , Figure 4 This is an architecture diagram of the energy storage system 100 in this application embodiment. When the first slave control module 2021 disconnects from the electrical energy interaction with the first battery 101, the communication between the first slave control module 2021 and the master control module 201 is lost. The remaining second slave control modules 2022 to the Nth slave control module 2024 are connected in series and are connected to the master control module 201 through the second sub-communication loop 2021b of the first slave control module 2021.

[0100] According to the second aspect of this application, please refer to Figure 8 , Figure 8 This is a flowchart of a control method for an energy storage system 100 provided in an embodiment of this application. Figure 8 As shown, the control method of the energy storage system 100 may include the following step S60.

[0101] Step S60: When valve 30 is in the first valve opening position, the power interaction between at least one slave control module 202 and the corresponding battery 10 is disconnected to wake up the master control module 201 to execute the preset function.

[0102] In some embodiments, step S60 can be implemented by the following step S61: Step S61: When valve 30 is in the second valve opening position, each slave control module 202 establishes an electrical energy interaction with the corresponding battery 10 so that each slave control module 202 obtains the operating parameters of the battery 10 respectively. The opening degree of the second valve is smaller than that of the first valve.

[0103] The operating parameters of the battery 10 are obtained from the control module 202. This can be done continuously or periodically at a certain time interval.

[0104] In some embodiments, Figure 9 This is a flowchart of a control method for an energy storage system 100 provided in an embodiment of this application. Figure 9 As shown, the control method of the energy storage system 100 may include the following step S70.

[0105] Step S70: When the power interaction between one of the slave control modules 202 and the battery 10 is disconnected, each of the remaining slave control modules 202 maintains power interaction with the corresponding battery 10.

[0106] In some embodiments, the control method of the energy storage system 100 may further include the following steps S81, S82, S83 and S84.

[0107] Step S81: Detect the temperature data of battery 10.

[0108] Step S82: Detect the voltage data of battery 10.

[0109] Step S83: Collect pressure data inside battery 10.

[0110] Step S84: Detect the temperature data of valve 30.

[0111] For example, in the embodiments of this application, steps S81 to S84 can be performed simultaneously or at intervals. There is no limitation on this.

[0112] According to a third aspect of this application, embodiments of this application also provide a computer-readable storage medium storing a computer program or instructions that, when executed by a processor, implement the above-described wake-up control method and have all the beneficial effects of the control method of the above-described energy storage system 100, which will not be elaborated further here.

[0113] According to a fourth aspect of this application, embodiments of this application also provide a computer program product, including a computer program or instructions, which, when executed by a processor, implement the control method of the energy storage system 100 described above and have all the beneficial effects of the control method of the energy storage system 100 described above, which will not be elaborated further here.

[0114] According to a fifth aspect of this application, embodiments of this application also provide an electronic device, including: a memory and a processor, wherein the memory stores a computer program or instructions; the processor is used to execute the computer program or instructions in the memory to implement the steps of the control method for the energy storage system 100 described above. This electronic device possesses all the beneficial effects of the control method for the energy storage system 100 described above, which will not be elaborated upon here.

[0115] Computer-readable storage media can be, for example, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof, without particular limitation herein. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0116] In some embodiments of this application, a computer-readable storage medium may be any tangible medium that contains or stores a program that may be used or combined with an instruction execution system, apparatus, or device.

[0117] The aforementioned computer-readable storage medium may be included in the aforementioned electronic device or may exist independently without being assembled into the electronic device.

[0118] Computer program code for performing operations of some embodiments of this application can be written in one or more programming languages ​​or a combination thereof. These programming languages ​​include object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network (including a Local Area Network (LAN) or a Wide Area Network (WAN)), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0119] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function.

[0120] It should also be noted that in some alternative implementations, the functions marked in the box may occur in a different order than those marked in the attached figures.

[0121] For example, two consecutively represented blocks can actually be executed in substantially parallel order, and sometimes they can be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, as well as combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified functions or operations, or using a combination of dedicated hardware and computer instructions.

[0122] The units described in some embodiments of this application can be implemented in software or in hardware. The described units can also be located in a processor.

[0123] The functions described above in this document can be performed at least in part by one or more hardware logic components. For example, exemplary types of hardware logic components that can be used, without limitation, include: Field Programmable Gate Array (FPGA), Application Specific Integrated Circuit (ASIC), Application Specific Standard Parts (ASSP), System on Chip (SOC), Complex Programmable Logic Device (CPLD), and so on.

[0124] The energy storage system 100 in this embodiment includes a battery pack 10. After the main control module 201 of the battery management system 20 is activated, the battery management system 20 can monitor many key parameters of the battery 10 in real time, such as voltage, current, temperature, state of charge (SOC), state of health (SOH), and remaining discharge capacity (RUL), to confirm the state of the battery 10.

[0125] According to a sixth aspect of this application, embodiments of this application also provide an electrical device that includes the aforementioned electronic device or the aforementioned energy storage system 100. This electrical device possesses all the beneficial effects of the aforementioned electronic device and energy storage system 100, which will not be elaborated upon here.

[0126] If the electrical equipment in this embodiment includes a vehicle, then the energy storage system 100 can be the vehicle's power battery pack 10, used to provide the electrical energy required for the vehicle to drive.

[0127] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not make any specific restrictions.

[0128] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0129] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0130] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0131] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An energy storage system, characterized in that, The energy storage system includes: Battery; The battery management system includes a master control module and at least two slave control modules connected electrically, wherein at least one of the slave control modules interacts with the battery. A valve is disposed between at least one of the slave control modules and the corresponding battery, the valve being configured to have a first valve opening degree; The first temperature detection module is configured to detect the temperature data of the valve, and the first temperature detection module is electrically connected to the main control module; When the valve is at the first valve opening degree, at least one of the slave control modules disconnects the power exchange with the corresponding battery to wake up the master control module to execute a preset function; wherein the preset function includes collecting the temperature data of the valve and / or the operating parameters of the battery.

2. The energy storage system according to claim 1, characterized in that, The main control module is also configured to: If the temperature data of the valve is greater than or equal to the temperature threshold, it is determined that the energy storage system has malfunctioned.

3. The energy storage system according to claim 2, characterized in that, The first temperature detection module is configured to correspond one-to-one with each of the valves; the main control module is further configured to: Based on the temperature data of the valve, locate the faulty battery.

4. The energy storage system according to claim 1, characterized in that, The valve is also configured to have a second valve opening degree; When the valve is at the second valve opening degree, each slave control module and the corresponding battery form an electrical energy interaction, so that each slave control module can obtain the operating parameters of the battery respectively; The opening degree of the second valve is less than that of the first valve.

5. The energy storage system according to claim 4, characterized in that, The first valve opening includes the maximum opening; and / or The second valve opening degree includes the minimum opening degree.

6. The energy storage system according to claim 1, characterized in that, Each slave control module has a first circuit with the corresponding battery, and a valve is set in one of the first circuits to control the opening and closing of the first circuit where the valve is located.

7. The energy storage system according to claim 1, characterized in that, The battery management system is further configured such that, when one of the slave control modules disconnects its power interaction with the battery, each of the remaining slave control modules maintains power interaction with its corresponding battery, and each of the remaining slave control modules is electrically connected to the master control module.

8. The energy storage system according to any one of claims 1 to 7, characterized in that, The operating parameters of the battery include the battery's temperature data; The battery management system also includes: The second temperature detection module is configured to detect the temperature data of the battery. Each of the second temperature detection modules is connected to the corresponding slave control module.

9. The energy storage system according to any one of claims 1 to 7, characterized in that, The operating parameters of the battery include the battery's voltage data; The battery management system also includes: A voltage detection module is configured to detect the voltage data of the battery; Each of the voltage detection modules is connected to the corresponding slave control module.

10. The energy storage system according to any one of claims 1 to 7, characterized in that, The energy storage system is further configured to, when the internal air pressure of the energy storage system reaches a first air pressure threshold, cause the valve to be at a first valve opening degree under the action of the air pressure.

11. A control method for an energy storage system, characterized in that, Applied to the energy storage system according to any one of claims 1 to 10, The method includes: When the valve is at the first valve opening degree, the power interaction between at least one slave control module and the corresponding battery is disconnected to wake up the master control module to collect the temperature data of the valve and / or the operating parameters of the battery.

12. The control method according to claim 11, characterized in that, The method further includes: Based on the temperature data of the valve, locate the faulty battery.

13. The control method according to claim 11, characterized in that, The method further includes: When the valve is at the second valve opening degree, each slave control module and the corresponding battery form an electrical energy interaction, so that each slave control module can obtain the operating parameters of the battery respectively; The opening degree of the second valve is smaller than that of the first valve.

14. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to perform the steps of the method according to any one of claims 11 to 13.

15. An electrical appliance, characterized in that, The energy storage system includes any one of claims 1 to 10.

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